[fixes] stackalloc warnings, consolidate duplicated methods, minor adjustments in project settings (#39)

* [fixes] stackalloc warnings, consolidate duplicated methods

* [fix] remove unnecessary edit in .slnx file

.editorconfig

@@ -14,7 +14,7 @@ indent_size = 4
 indent_style = space
 tab_width = 4
 
-[*.{md,json,yml,props,csproj}]
+[*.{md,json,yml,xml,props,csproj}]
 
 indent_size = 2
 tab_width = 2

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,59 @@
+# Copyright (C) 2026 SharpEmu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+name: Bug Report
+description: Report a bug in the emulator
+labels: ["bug"]
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ### Before creating an issue
+
+        - Do not create issues involving **software piracy**. Our rules specifically prohibit this.  
+          Issues related to piracy will be closed and the author may be banned from the repository.
+
+        - The issue tracker is **not for asking questions**.  
+          Question-type issues will be closed.
+
+        - Only open an issue if you are reporting an actual **bug in the emulator**.
+
+  - type: input
+    id: emulator_version
+    attributes:
+      label: Emulator Version / Commit
+      description: The emulator version or git commit where the bug occurred
+      placeholder: e.g. v0.0.2 / a1b2c3d
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Bug Description
+      description: Describe the problem and how to reproduce it
+      placeholder: |
+        Steps to reproduce:
+        1. Launch emulator
+        2. Load game
+        3. Crash occurs
+
+        Expected behavior:
+        ...
+
+        Actual behavior:
+        ...
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Log File
+      description: |
+        Drag & drop your log file here, or paste the log contents.
+
+        Supported: .log / .txt / .zip
+        Large logs should be uploaded as a file.
+      render: shell

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,4 @@
+# Copyright (C) 2026 SharpEmu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/game-compatibility.yml

@@ -1,3 +1,6 @@
+# Copyright (C) 2026 SharpEmu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 name: Game Compatibility Report
 description: Report compatibility status of a game
 labels: ["game-compatibility"]

.github/workflows/workflow.yml

@@ -1,3 +1,6 @@
+# Copyright (C) 2026 SharpEmu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 name: Build and Release
 
 on:
@@ -6,11 +9,17 @@ on:
       - "**"
     paths-ignore:
       - "**/*.md"
+      - "**/*.png"
+      - "**/*.jpeg"
+      - "**/*.jpg"
   pull_request:
     branches:
       - main
     paths-ignore:
       - "**/*.md"
+      - "**/*.png"
+      - "**/*.jpeg"
+      - "**/*.jpg"
   workflow_dispatch:
 
 permissions:
@@ -79,7 +88,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: 10.0.x
+          dotnet-version: 10.0.103
           cache: true
           cache-dependency-path: |
             Directory.Packages.props
@@ -106,7 +115,7 @@ jobs:
           Compress-Archive -Path (Join-Path $env:PUBLISH_DIR '*') -DestinationPath $archivePath -CompressionLevel Optimal
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ needs.init.outputs.artifact-name }}
           path: ${{ env.RELEASE_DIR }}\${{ needs.init.outputs.archive-name }}
@@ -117,13 +126,13 @@ jobs:
     needs:
       - init
       - build
-    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
+    if: github.event_name == 'workflow_dispatch' || (github.event_name == 'push' && github.ref == 'refs/heads/main')
     runs-on: ubuntu-latest
     permissions:
       contents: write
     steps:
       - name: Download build artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: ${{ needs.init.outputs.artifact-name }}
           path: release

.gitignore

@@ -26,11 +26,16 @@ arm64/
 *.userosscache
 *.sln.docstates
 
+.packages
 packages/
 *.nupkg
 .nuget/
+.dotnet-home/
+.cache/
 
 .DS_Store
 Thumbs.db
 Desktop.ini
 ehthumbs.db
+
+.vs/

Directory.Packages.props

@@ -1,13 +1,22 @@
-<!--
+<!--
 Copyright (C) 2026 SharpEmu Emulator Project
 SPDX-License-Identifier: GPL-2.0-or-later
 -->
-
 <Project>
   <PropertyGroup>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
   <ItemGroup>
+    <PackageVersion Include="Avalonia" Version="11.3.18" />
+    <PackageVersion Include="Avalonia.Desktop" Version="11.3.18" />
+    <PackageVersion Include="Avalonia.Fonts.Inter" Version="11.3.18" />
+    <PackageVersion Include="Avalonia.Themes.Fluent" Version="11.3.18" />
     <PackageVersion Include="Iced" Version="1.21.0" />
+    <PackageVersion Include="Silk.NET.Vulkan" Version="2.23.0" />
+    <PackageVersion Include="Silk.NET.Vulkan.Extensions.EXT" Version="2.23.0" />
+    <PackageVersion Include="Silk.NET.Vulkan.Extensions.KHR" Version="2.23.0" />
+    <PackageVersion Include="Silk.NET.Windowing" Version="2.23.0" />
+    <!-- Transitive of Avalonia.Desktop; pinned to fix GHSA-xrw6-gwf8-vvr9 -->
+    <PackageVersion Include="Tmds.DBus.Protocol" Version="0.21.3" />
   </ItemGroup>
-</Project>
+</Project>

REUSE.toml

@@ -3,10 +3,14 @@ version = 1
 [[annotations]]
 path = [
     "REUSE.toml",
+    "nuget.config",
+    "global.json",
     "**/packages.lock.json",
     "scripts/ps5_names.txt",
     "src/SharpEmu.HLE/Aerolib/aerolib.bin",
-    "_logs/**"
+    "_logs/**",
+    ".github/images/**",
+    "assets/images/**"
 ]
 precedence = "aggregate"
 SPDX-FileCopyrightText = "SharpEmu Emulator Project"

SharpEmu.slnx

@@ -7,6 +7,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
   <Folder Name="/src/">
     <Project Path="src/SharpEmu.CLI/SharpEmu.CLI.csproj" />
     <Project Path="src/SharpEmu.Core/SharpEmu.Core.csproj" />
+    <Project Path="src/SharpEmu.GUI/SharpEmu.GUI.csproj" />
     <Project Path="src/SharpEmu.HLE/SharpEmu.HLE.csproj" />
     <Project Path="src/SharpEmu.Libs/SharpEmu.Libs.csproj" />
     <Project Path="src/SharpEmu.Logging/SharpEmu.Logging.csproj" />

global.json

@@ -0,0 +1,6 @@
+{
+    "sdk": {
+        "version": "10.0.103",
+        "rollForward": "latestFeature"
+    }
+}

nuget.config

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<configuration>
+  <config>
+    <add key="globalPackagesFolder" value=".packages" />
+  </config>
+
+  <packageSources>
+    <clear />
+    <add key="Nuget" value="https://api.nuget.org/v3/index.json" />
+  </packageSources>
+
+  <packageSourceMapping>
+    <packageSource key="Nuget">
+      <package pattern="*" />
+    </packageSource>
+  </packageSourceMapping>
+</configuration>

src/SharpEmu.CLI/Program.cs

@@ -3,6 +3,7 @@
 
 using SharpEmu.Core.Runtime;
 using SharpEmu.Core.Cpu;
+using SharpEmu.GUI;
 using SharpEmu.HLE;
 using SharpEmu.Logging;
 using System.Runtime.InteropServices;
@@ -24,12 +25,32 @@ internal static partial class Program
     private const ulong PROCESS_CREATION_MITIGATION_POLICY2_CET_USER_SHADOW_STACKS_ALWAYS_OFF = 0x00000002UL << 28;
     private const ulong PROCESS_CREATION_MITIGATION_POLICY2_USER_CET_SET_CONTEXT_IP_VALIDATION_ALWAYS_OFF = 0x00000002UL << 32;
     private const ulong PROCESS_CREATION_MITIGATION_POLICY2_XTENDED_CONTROL_FLOW_GUARD_ALWAYS_OFF = 0x00000002UL << 40;
+    private const int ATTACH_PARENT_PROCESS = -1;
+    private const int STD_OUTPUT_HANDLE = -11;
+    private const int STD_ERROR_HANDLE = -12;
+    private const uint GENERIC_READ = 0x80000000;
+    private const uint GENERIC_WRITE = 0x40000000;
+    private const uint FILE_SHARE_READ = 0x00000001;
+    private const uint FILE_SHARE_WRITE = 0x00000002;
+    private const uint OPEN_EXISTING = 3;
 
+    [STAThread]
     private static int Main(string[] args)
     {
+        args = NormalizeInternalArguments(args, out var isMitigatedChild);
+        if (args.Length == 0 && !isMitigatedChild)
+        {
+            // No arguments: open the desktop frontend. Any argument selects
+            // the classic CLI behavior below.
+            return GuiLauncher.Run();
+        }
+
+        // The executable uses the GUI subsystem, so CLI mode has to connect
+        // itself to a console before the first write.
+        EnsureCliConsole();
+
         Console.Error.WriteLine($"[DEBUG] SharpEmu starting with {args.Length} args");
 
-        args = NormalizeInternalArguments(args, out var isMitigatedChild);
         if (!isMitigatedChild && TryRunMitigatedChild(args, out var childExitCode))
         {
             return childExitCode;
@@ -101,6 +122,58 @@ internal static partial class Program
         return result == OrbisGen2Result.ORBIS_GEN2_OK ? 0 : 4;
     }
 
+    private static void EnsureCliConsole()
+    {
+        if (!OperatingSystem.IsWindows())
+        {
+            return;
+        }
+
+        // Standard handles already provided (pipes or file redirection, e.g.
+        // when the GUI or a script launches us): use them as-is.
+        if (IsHandleValid(GetStdHandle(STD_OUTPUT_HANDLE)) && IsHandleValid(GetStdHandle(STD_ERROR_HANDLE)))
+        {
+            return;
+        }
+
+        // Prefer the console of the parent process (interactive terminal);
+        // create one only when started with arguments but no terminal at all
+        // (e.g. a shortcut), so usage and errors remain visible.
+        if (!AttachConsole(ATTACH_PARENT_PROCESS) && GetConsoleWindow() == 0)
+        {
+            _ = AllocConsole();
+        }
+
+        RebindStdHandleToConsole(STD_OUTPUT_HANDLE);
+        RebindStdHandleToConsole(STD_ERROR_HANDLE);
+    }
+
+    private static void RebindStdHandleToConsole(int stdHandle)
+    {
+        if (IsHandleValid(GetStdHandle(stdHandle)) || GetConsoleWindow() == 0)
+        {
+            return;
+        }
+
+        var conOut = CreateFileW(
+            "CONOUT$",
+            GENERIC_READ | GENERIC_WRITE,
+            FILE_SHARE_READ | FILE_SHARE_WRITE,
+            0,
+            OPEN_EXISTING,
+            0,
+            0);
+        if (IsHandleValid(conOut))
+        {
+            _ = SetStdHandle(stdHandle, conOut);
+        }
+    }
+
+    private static bool IsHandleValid(nint handle)
+    {
+        return handle != 0 && handle != -1;
+    }
+
     private static string[] NormalizeInternalArguments(string[] args, out bool isMitigatedChild)
     {
         isMitigatedChild = false;
@@ -670,4 +743,32 @@ internal static partial class Program
     [DllImport("kernel32.dll", SetLastError = true)]
     [return: MarshalAs(UnmanagedType.Bool)]
     private static extern bool CloseHandle(nint handle);
+
+    [DllImport("kernel32.dll")]
+    private static extern nint GetConsoleWindow();
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool AttachConsole(int processId);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool AllocConsole();
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    private static extern nint GetStdHandle(int stdHandle);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool SetStdHandle(int stdHandle, nint handle);
+
+    [DllImport("kernel32.dll", EntryPoint = "CreateFileW", SetLastError = true, CharSet = CharSet.Unicode)]
+    private static extern nint CreateFileW(
+        string fileName,
+        uint desiredAccess,
+        uint shareMode,
+        nint securityAttributes,
+        uint creationDisposition,
+        uint flagsAndAttributes,
+        nint templateFile);
 }

src/SharpEmu.CLI/SharpEmu.CLI.csproj

@@ -7,11 +7,14 @@ SPDX-License-Identifier: GPL-2.0-or-later
 
   <ItemGroup>
     <ProjectReference Include="..\SharpEmu.Core\SharpEmu.Core.csproj" />
+    <ProjectReference Include="..\SharpEmu.GUI\SharpEmu.GUI.csproj" />
     <ProjectReference Include="..\SharpEmu.Logging\SharpEmu.Logging.csproj" />
   </ItemGroup>
 
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
+    <!-- GUI subsystem so starting without arguments opens the frontend with no
+         console window; CLI mode re-attaches to the parent terminal's console. -->
+    <OutputType>WinExe</OutputType>
     <AssemblyName>SharpEmu</AssemblyName>
     <RuntimeIdentifiers>win-x64;linux-x64;osx-arm64</RuntimeIdentifiers>
     <SelfContained>true</SelfContained>
@@ -30,6 +33,15 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(RuntimeIdentifier)' == 'win-x64' Or '$(RuntimeIdentifier)' == ''">
+    <ApplicationIcon>..\..\assets\images\SharpEmu.ico</ApplicationIcon>
+    <Win32Icon>..\..\assets\images\SharpEmu.ico</Win32Icon>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <NoWarn>$(NoWarn);1591</NoWarn>
+  </PropertyGroup>
+  
   <ItemGroup>
     <Content Include="..\..\LICENSE.txt">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
@@ -38,4 +50,17 @@ SPDX-License-Identifier: GPL-2.0-or-later
     </Content>
   </ItemGroup>
 
+  <!-- Keep glfw as a loose file next to the executable; every other native
+       library is embedded into the single-file bundle. -->
+  <Target Name="KeepGlfwOutsideSingleFile" AfterTargets="ComputeResolvedFilesToPublishList">
+    <ItemGroup>
+      <_GlfwPublishFiles Include="@(ResolvedFileToPublish)"
+                         Condition="$([System.String]::Copy('%(ResolvedFileToPublish.Filename)').StartsWith('glfw'))" />
+      <ResolvedFileToPublish Remove="@(_GlfwPublishFiles)" />
+      <ResolvedFileToPublish Include="@(_GlfwPublishFiles)">
+        <ExcludeFromSingleFile>true</ExcludeFromSingleFile>
+      </ResolvedFileToPublish>
+    </ItemGroup>
+  </Target>
+
 </Project>

src/SharpEmu.CLI/packages.lock.json

@@ -4,9 +4,196 @@
     "net10.0": {
       "Microsoft.NET.ILLink.Tasks": {
         "type": "Direct",
-        "requested": "[10.0.3, )",
-        "resolved": "10.0.3",
-        "contentHash": "0B6nZyCHWXnvmlB559oduOspVdNOnpNXPjhpWVMovLPAsDVG7A4jJR9rzECf67JUzxP8/ee/wA8clwIzJcWNFA=="
+        "requested": "[10.0.9, )",
+        "resolved": "10.0.9",
+        "contentHash": "4Iw41e2h7I4t70SJcX2GCmbyKJIlA273Cfm9RJMM050/3VBejGAG1KcthP5Z2L6SQcbfbf6BhNWO26+ZG+GzMg=="
+      },
+      "Avalonia.Angle.Windows.Natives": {
+        "type": "Transitive",
+        "resolved": "2.1.25547.20250602",
+        "contentHash": "ZL0VLc4s9rvNNFt19Pxm5UNAkmKNylugAwJPX9ulXZ6JWs/l6XZihPWWTyezaoNOVyEPU8YbURtW7XMAtqXH5A=="
+      },
+      "Avalonia.BuildServices": {
+        "type": "Transitive",
+        "resolved": "11.3.2",
+        "contentHash": "qHDToxto1e3hci5YqbG9n0Ty8mlp3zBUN5wT66wKqaDVzXyQ0do3EnRILd4Ke9jpvsktaPpgE0YjEk7hornryQ=="
+      },
+      "Avalonia.FreeDesktop": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "aUwv8BNruRUOaUfMu4U3uibIUS60/rSHgGOhd8zBkLkpxY3JFJvgRbeq5ZzHIyKXCuKi18PO00YHAgCarp3wdw==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Tmds.DBus.Protocol": "0.21.3"
+        }
+      },
+      "Avalonia.Native": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "8g53DROFW6wVJAnTsE1Iu5bdZO5r0oqxbdbMQODs1QDYCK2IU/y/x/vQVKCYOvqxl4tXkzU9tExv8XqSGPWthQ==",
+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
+      },
+      "Avalonia.Remote.Protocol": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "vw+6ZfgTuu72dA9aVWn6u56t2nrBd5MoMU0wo/qI9XJAl/c0oYYphIvwLvJP1JorubQY4UE3d0ac8ULBhrGBiA=="
+      },
+      "Avalonia.Skia": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "/B4aXmNRNjG8I5U/a1xJI+bIi0XO6DDzS3mBrIKlVnJRY2CyZiUeESRQXLnIU77Z9TvqkUROs+D47s085YjFtA==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "HarfBuzzSharp": "8.3.1.1",
+          "HarfBuzzSharp.NativeAssets.Linux": "8.3.1.1",
+          "HarfBuzzSharp.NativeAssets.WebAssembly": "8.3.1.1",
+          "SkiaSharp": "2.88.9",
+          "SkiaSharp.NativeAssets.Linux": "2.88.9",
+          "SkiaSharp.NativeAssets.WebAssembly": "2.88.9"
+        }
+      },
+      "Avalonia.Win32": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "eioUHkM2PeLPETd1aEks3rvb9plbba6buIrNdrqCpwE/qgHKUjvRNBd5mUQfAbGgTLiAes524gB8uUMDhrsJVQ==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Avalonia.Angle.Windows.Natives": "2.1.25547.20250602"
+        }
+      },
+      "Avalonia.X11": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "m4Ki/G5Dovnq+6QzfS0iGbK8V77Q6oTjToMLOB0CxPCCrl3Oxywh6kIjuGJDPaN6kopMmjxlNShyQf+vPYL+JA==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Avalonia.FreeDesktop": "11.3.18",
+          "Avalonia.Skia": "11.3.18"
+        }
+      },
+      "HarfBuzzSharp": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "tLZN66oe/uiRPTZfrCU4i8ScVGwqHNh5MHrXj0yVf4l7Mz0FhTGnQ71RGySROTmdognAs0JtluHkL41pIabWuQ==",
+        "dependencies": {
+          "HarfBuzzSharp.NativeAssets.Win32": "8.3.1.1",
+          "HarfBuzzSharp.NativeAssets.macOS": "8.3.1.1"
+        }
+      },
+      "HarfBuzzSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "3EZ1mpIiKWRLL5hUYA82ZHteeDIVaEA/Z0rA/wU6tjx6crcAkJnBPwDXZugBSfo8+J3EznvRJf49uMsqYfKrHg=="
+      },
+      "HarfBuzzSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "jbtCsgftcaFLCA13tVKo5iWdElJScrulLTKJre36O4YQTIlwDtPPqhRZNk+Y0vv4D1gxbscasGRucUDfS44ofQ=="
+      },
+      "HarfBuzzSharp.NativeAssets.WebAssembly": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "loJweK2u/mH/3C2zBa0ggJlITIszOkK64HLAZB7FUT670dTg965whLFYHDQo69NmC4+d9UN0icLC9VHidXaVCA=="
+      },
+      "HarfBuzzSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "UsJtQsfAJoFDZrXc4hCUfRPMqccfKZ0iumJ/upcUjz/cmsTgVFGNEL5yaJWmkqsuFYdMWbj/En5/kS4PFl9hBA=="
+      },
+      "MicroCom.Runtime": {
+        "type": "Transitive",
+        "resolved": "0.11.0",
+        "contentHash": "MEnrZ3UIiH40hjzMDsxrTyi8dtqB5ziv3iBeeU4bXsL/7NLSal9F1lZKpK+tfBRnUoDSdtcW3KufE4yhATOMCA=="
+      },
+      "Microsoft.DotNet.PlatformAbstractions": {
+        "type": "Transitive",
+        "resolved": "3.1.6",
+        "contentHash": "jek4XYaQ/PGUwDKKhwR8K47Uh1189PFzMeLqO83mXrXQVIpARZCcfuDedH50YDTepBkfijCZN5U/vZi++erxtg=="
+      },
+      "Microsoft.Extensions.DependencyModel": {
+        "type": "Transitive",
+        "resolved": "9.0.9",
+        "contentHash": "fNGvKct2De8ghm0Bpfq0iWthtzIWabgOTi+gJhNOPhNJIowXNEUE2eZNW/zNCzrHVA3PXg2yZ+3cWZndC2IqYA=="
+      },
+      "Silk.NET.Core": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "D7AT/nnwlB+4RZ84XY8QNGBZMJI5z9l4CSSETIJ1wCfRJzRt/341y3MRZ4HbnFz4r/IGaWOEZr86iE+0/65yyQ==",
+        "dependencies": {
+          "Microsoft.DotNet.PlatformAbstractions": "3.1.6",
+          "Microsoft.Extensions.DependencyModel": "9.0.9"
+        }
+      },
+      "Silk.NET.GLFW": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "UIs4sH57xlPUNHQ/1bt9rymPWlGy8IMDCNv86h0iM4TOA1CkIx0XM/n/tA4AReh1zQkNrvkxPEdZ3Blvy1dyXg==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Ultz.Native.GLFW": "3.4.0"
+        }
+      },
+      "Silk.NET.Maths": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "r8PdIVzME8EH0qAgbmRPO87I4GfgR2j8TofT7EMuRJDf1QluoQwnVypDoFJjQ2ZBSRsGYk5unYxxogI05Ogsmw=="
+      },
+      "Silk.NET.Windowing.Common": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "ThStSinmY9KQI8DGiF5XEhkLJVnBcgRTBTzL9ijg1wMZAYuckz7ykrNw04fjRm2Gryh6tCNGbvz2XaY0efeFzg==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Silk.NET.Maths": "2.23.0"
+        }
+      },
+      "Silk.NET.Windowing.Glfw": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "aYBudKmENmvLRn9p15HbdvlQTnnXskcDfTfbYwSb/4fr263rGLwYuDw/txUEc2jihHJiWCp5+75Y7z5wTJWl7g==",
+        "dependencies": {
+          "Silk.NET.GLFW": "2.23.0",
+          "Silk.NET.Windowing.Common": "2.23.0"
+        }
+      },
+      "SkiaSharp": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "3MD5VHjXXieSHCleRLuaTXmL2pD0mB7CcOB1x2kA1I4bhptf4e3R27iM93264ZYuAq6mkUyX5XbcxnZvMJYc1Q==",
+        "dependencies": {
+          "SkiaSharp.NativeAssets.Win32": "2.88.9",
+          "SkiaSharp.NativeAssets.macOS": "2.88.9"
+        }
+      },
+      "SkiaSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "cWSaJKVPWAaT/WIn9c8T5uT/l4ETwHxNJTkEOtNKjphNo8AW6TF9O32aRkxqw3l8GUdUo66Bu7EiqtFh/XG0Zg==",
+        "dependencies": {
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+        }
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "Nv5spmKc4505Ep7oUoJ5vp3KweFpeNqxpyGDWyeEPTX2uR6S6syXIm3gj75dM0YJz7NPvcix48mR5laqs8dPuA=="
+      },
+      "SkiaSharp.NativeAssets.WebAssembly": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "kt06RccBHSnAs2wDYdBSfsjIDbY3EpsOVqnlDgKdgvyuRA8ZFDaHRdWNx1VHjGgYzmnFCGiTJBnXFl5BqGwGnA=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "wb2kYgU7iy84nQLYZwMeJXixvK++GoIuECjU4ECaUKNuflyRlJKyiRhN1MAHswvlvzuvkrjRWlK0Za6+kYQK7w=="
+      },
+      "Ultz.Native.GLFW": {
+        "type": "Transitive",
+        "resolved": "3.4.0",
+        "contentHash": "Iy22JopynbOJ32vA0lBhFEzGi65GQJBuJHYBYRBpydrDpNoTiHnjIXfA65Gu+8qsOr/ZEoIF8r9aHCgAXuO6DA=="
       },
       "sharpemu.core": {
         "type": "Project",
@@ -17,27 +204,284 @@
           "SharpEmu.Logging": "[1.0.0, )"
         }
       },
+      "sharpemu.gui": {
+        "type": "Project",
+        "dependencies": {
+          "Avalonia": "[11.3.18, )",
+          "Avalonia.Desktop": "[11.3.18, )",
+          "Avalonia.Fonts.Inter": "[11.3.18, )",
+          "Avalonia.Themes.Fluent": "[11.3.18, )",
+          "Tmds.DBus.Protocol": "[0.21.3, )"
+        }
+      },
       "sharpemu.hle": {
         "type": "Project"
       },
       "sharpemu.libs": {
         "type": "Project",
         "dependencies": {
-          "SharpEmu.HLE": "[1.0.0, )"
+          "SharpEmu.HLE": "[1.0.0, )",
+          "Silk.NET.Vulkan": "[2.23.0, )",
+          "Silk.NET.Vulkan.Extensions.EXT": "[2.23.0, )",
+          "Silk.NET.Vulkan.Extensions.KHR": "[2.23.0, )",
+          "Silk.NET.Windowing": "[2.23.0, )"
         }
       },
       "sharpemu.logging": {
         "type": "Project"
       },
+      "Avalonia": {
+        "type": "CentralTransitive",
+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
+        "contentHash": "2C4UxhWUObWGgYKWic1x5BMMWGJP6SElb91WeOxs+X/iR26rtkqpxFFwwo50FXS9AyYnHfk8QKXDEfe7oT/kZA==",
+        "dependencies": {
+          "Avalonia.BuildServices": "11.3.2",
+          "Avalonia.Remote.Protocol": "11.3.18",
+          "MicroCom.Runtime": "0.11.0"
+        }
+      },
+      "Avalonia.Desktop": {
+        "type": "CentralTransitive",
+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
+        "contentHash": "bilMPa5vYiis6fbNovb6esKytBnOCEGojBa1XFegLCRHCP6g6PvZwS0XF/YOAGkENRlHG8dI7lohOpQ9bIkq1g==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Avalonia.Native": "11.3.18",
+          "Avalonia.Skia": "11.3.18",
+          "Avalonia.Win32": "11.3.18",
+          "Avalonia.X11": "11.3.18"
+        }
+      },
+      "Avalonia.Fonts.Inter": {
+        "type": "CentralTransitive",
+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
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+        "dependencies": {
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+        }
+      },
+      "Avalonia.Themes.Fluent": {
+        "type": "CentralTransitive",
+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
+        "contentHash": "+Q/TJoynD0zNuu5w2gD+xcTl7GNKJFxlPYAndRLs/mTDrNbbsvv/271WyIysbMPsXSjCyBDp7RCZzQkpD6x5Bg==",
+        "dependencies": {
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+        }
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       "Iced": {
         "type": "CentralTransitive",
         "requested": "[1.21.0, )",
         "resolved": "1.21.0",
         "contentHash": "dv5+81Q1TBQvVMSOOOmRcjJmvWcX3BZPZsIq31+RLc5cNft0IHAyNlkdb7ZarOWG913PyBoFDsDXoCIlKmLclg=="
+      },
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+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "3/irtlSWXZ3eTi8N6nelI6L34NTB8ZJHpqVMNzZx2aX7Ek9YEQ34NoQW8/Tljrtmkg8KRhHW8hKTEzZaKV8PgA==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0"
+        }
+      },
+      "Silk.NET.Vulkan.Extensions.EXT": {
+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "+Oth189ksRiL6HvGCwIdnsYHawqrbO8y49u1H61z3wsfcHhQZeVDYe/wF5LD7fk3NcdgDvwFD3mLm1QWhdZySw==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Silk.NET.Vulkan": "2.23.0"
+        }
+      },
+      "Silk.NET.Vulkan.Extensions.KHR": {
+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "uRaf4j+SmH3DumjSSSUbFg33BnsGZUyXGj93O9NgGKZSJN3OTmNmQDxRew+/KiVLcgH6qzbto8aNGZ++j9GFWg==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Silk.NET.Vulkan": "2.23.0"
+        }
+      },
+      "Silk.NET.Windowing": {
+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "OPNPmt/lRyUKVYrFLQXVxyATqD3MKLc1iY1oKx1/2GppgmZxVZPwN12tekrQ4C7408kgB1L5JD1Wnirqqeb2kg==",
+        "dependencies": {
+          "Silk.NET.Windowing.Common": "2.23.0",
+          "Silk.NET.Windowing.Glfw": "2.23.0"
+        }
+      },
+      "Tmds.DBus.Protocol": {
+        "type": "CentralTransitive",
+        "requested": "[0.21.3, )",
+        "resolved": "0.21.3",
+        "contentHash": "hDwB8WsQoyALQKqIbwzS68UKdlnafDm4T/DkO/JrA/YIneP/rKv96SxYPVXeh3FP4i/SXfShrYftKLtciJAIlw=="
       }
     },
-    "net10.0/linux-x64": {},
-    "net10.0/osx-arm64": {},
-    "net10.0/win-x64": {}
+    "net10.0/linux-x64": {
+      "Avalonia.Angle.Windows.Natives": {
+        "type": "Transitive",
+        "resolved": "2.1.25547.20250602",
+        "contentHash": "ZL0VLc4s9rvNNFt19Pxm5UNAkmKNylugAwJPX9ulXZ6JWs/l6XZihPWWTyezaoNOVyEPU8YbURtW7XMAtqXH5A=="
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+        }
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+      "HarfBuzzSharp.NativeAssets.Linux": {
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+        "resolved": "8.3.1.1",
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+        "type": "Transitive",
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+        "contentHash": "jbtCsgftcaFLCA13tVKo5iWdElJScrulLTKJre36O4YQTIlwDtPPqhRZNk+Y0vv4D1gxbscasGRucUDfS44ofQ=="
+      },
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+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "UsJtQsfAJoFDZrXc4hCUfRPMqccfKZ0iumJ/upcUjz/cmsTgVFGNEL5yaJWmkqsuFYdMWbj/En5/kS4PFl9hBA=="
+      },
+      "SkiaSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "cWSaJKVPWAaT/WIn9c8T5uT/l4ETwHxNJTkEOtNKjphNo8AW6TF9O32aRkxqw3l8GUdUo66Bu7EiqtFh/XG0Zg==",
+        "dependencies": {
+          "SkiaSharp": "2.88.9"
+        }
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "Nv5spmKc4505Ep7oUoJ5vp3KweFpeNqxpyGDWyeEPTX2uR6S6syXIm3gj75dM0YJz7NPvcix48mR5laqs8dPuA=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "wb2kYgU7iy84nQLYZwMeJXixvK++GoIuECjU4ECaUKNuflyRlJKyiRhN1MAHswvlvzuvkrjRWlK0Za6+kYQK7w=="
+      },
+      "Ultz.Native.GLFW": {
+        "type": "Transitive",
+        "resolved": "3.4.0",
+        "contentHash": "Iy22JopynbOJ32vA0lBhFEzGi65GQJBuJHYBYRBpydrDpNoTiHnjIXfA65Gu+8qsOr/ZEoIF8r9aHCgAXuO6DA=="
+      }
+    },
+    "net10.0/osx-arm64": {
+      "Avalonia.Angle.Windows.Natives": {
+        "type": "Transitive",
+        "resolved": "2.1.25547.20250602",
+        "contentHash": "ZL0VLc4s9rvNNFt19Pxm5UNAkmKNylugAwJPX9ulXZ6JWs/l6XZihPWWTyezaoNOVyEPU8YbURtW7XMAtqXH5A=="
+      },
+      "Avalonia.Native": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "8g53DROFW6wVJAnTsE1Iu5bdZO5r0oqxbdbMQODs1QDYCK2IU/y/x/vQVKCYOvqxl4tXkzU9tExv8XqSGPWthQ==",
+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
+      },
+      "HarfBuzzSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "3EZ1mpIiKWRLL5hUYA82ZHteeDIVaEA/Z0rA/wU6tjx6crcAkJnBPwDXZugBSfo8+J3EznvRJf49uMsqYfKrHg=="
+      },
+      "HarfBuzzSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "jbtCsgftcaFLCA13tVKo5iWdElJScrulLTKJre36O4YQTIlwDtPPqhRZNk+Y0vv4D1gxbscasGRucUDfS44ofQ=="
+      },
+      "HarfBuzzSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "UsJtQsfAJoFDZrXc4hCUfRPMqccfKZ0iumJ/upcUjz/cmsTgVFGNEL5yaJWmkqsuFYdMWbj/En5/kS4PFl9hBA=="
+      },
+      "SkiaSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "cWSaJKVPWAaT/WIn9c8T5uT/l4ETwHxNJTkEOtNKjphNo8AW6TF9O32aRkxqw3l8GUdUo66Bu7EiqtFh/XG0Zg==",
+        "dependencies": {
+          "SkiaSharp": "2.88.9"
+        }
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "Nv5spmKc4505Ep7oUoJ5vp3KweFpeNqxpyGDWyeEPTX2uR6S6syXIm3gj75dM0YJz7NPvcix48mR5laqs8dPuA=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "wb2kYgU7iy84nQLYZwMeJXixvK++GoIuECjU4ECaUKNuflyRlJKyiRhN1MAHswvlvzuvkrjRWlK0Za6+kYQK7w=="
+      },
+      "Ultz.Native.GLFW": {
+        "type": "Transitive",
+        "resolved": "3.4.0",
+        "contentHash": "Iy22JopynbOJ32vA0lBhFEzGi65GQJBuJHYBYRBpydrDpNoTiHnjIXfA65Gu+8qsOr/ZEoIF8r9aHCgAXuO6DA=="
+      }
+    },
+    "net10.0/win-x64": {
+      "Avalonia.Angle.Windows.Natives": {
+        "type": "Transitive",
+        "resolved": "2.1.25547.20250602",
+        "contentHash": "ZL0VLc4s9rvNNFt19Pxm5UNAkmKNylugAwJPX9ulXZ6JWs/l6XZihPWWTyezaoNOVyEPU8YbURtW7XMAtqXH5A=="
+      },
+      "Avalonia.Native": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "8g53DROFW6wVJAnTsE1Iu5bdZO5r0oqxbdbMQODs1QDYCK2IU/y/x/vQVKCYOvqxl4tXkzU9tExv8XqSGPWthQ==",
+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
+      },
+      "HarfBuzzSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "3EZ1mpIiKWRLL5hUYA82ZHteeDIVaEA/Z0rA/wU6tjx6crcAkJnBPwDXZugBSfo8+J3EznvRJf49uMsqYfKrHg=="
+      },
+      "HarfBuzzSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "jbtCsgftcaFLCA13tVKo5iWdElJScrulLTKJre36O4YQTIlwDtPPqhRZNk+Y0vv4D1gxbscasGRucUDfS44ofQ=="
+      },
+      "HarfBuzzSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "UsJtQsfAJoFDZrXc4hCUfRPMqccfKZ0iumJ/upcUjz/cmsTgVFGNEL5yaJWmkqsuFYdMWbj/En5/kS4PFl9hBA=="
+      },
+      "SkiaSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "cWSaJKVPWAaT/WIn9c8T5uT/l4ETwHxNJTkEOtNKjphNo8AW6TF9O32aRkxqw3l8GUdUo66Bu7EiqtFh/XG0Zg==",
+        "dependencies": {
+          "SkiaSharp": "2.88.9"
+        }
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "Nv5spmKc4505Ep7oUoJ5vp3KweFpeNqxpyGDWyeEPTX2uR6S6syXIm3gj75dM0YJz7NPvcix48mR5laqs8dPuA=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "wb2kYgU7iy84nQLYZwMeJXixvK++GoIuECjU4ECaUKNuflyRlJKyiRhN1MAHswvlvzuvkrjRWlK0Za6+kYQK7w=="
+      },
+      "Ultz.Native.GLFW": {
+        "type": "Transitive",
+        "resolved": "3.4.0",
+        "contentHash": "Iy22JopynbOJ32vA0lBhFEzGi65GQJBuJHYBYRBpydrDpNoTiHnjIXfA65Gu+8qsOr/ZEoIF8r9aHCgAXuO6DA=="
+      }
+    }
   }
 }

src/SharpEmu.Core/Cpu/CpuDispatcher.cs

@@ -22,6 +22,7 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
     private const ulong StackSize = 0x0020_0000UL;
     private const ulong TlsBaseAddress = 0x7FFE_0000_0000UL;
     private const ulong TlsSize = 0x0001_0000UL;
+    private const ulong TlsPrefixSize = 0x0000_1000UL;
     private const ulong BootstrapStubBaseAddress = 0x7FFD_F000_0000UL;
     private const ulong BootstrapPayloadBaseAddress = 0x7FFD_E000_0000UL;
     private const ulong DynlibFallbackStubBaseAddress = 0x7FFD_D000_0000UL;
@@ -193,6 +194,11 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
             return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
         }
 
+        if (!InitializeGuestFrameChainSentinel(context))
+        {
+            return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
         if (!InitializeTls(context, tlsBase))
         {
             return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
@@ -337,11 +343,12 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
         for (var i = 0; i < 32; i++)
         {
             var candidateBase = TlsBaseAddress - ((ulong)i * tlsStride);
+            var mappedBase = candidateBase - TlsPrefixSize;
             try
             {
                 _virtualMemory.Map(
-                    candidateBase,
-                    TlsSize,
+                    mappedBase,
+                    TlsSize + TlsPrefixSize,
                     fileOffset: 0,
                     fileData: ReadOnlySpan<byte>.Empty,
                     ProgramHeaderFlags.Read | ProgramHeaderFlags.Write);
@@ -358,9 +365,28 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
 
     private static bool InitializeTls(CpuContext context, ulong tlsBase)
     {
-        return context.TryWriteUInt64(tlsBase + 0x00, tlsBase) &&
+        return context.TryWriteUInt64(tlsBase - 0xF0, 0) &&
+               context.TryWriteUInt64(tlsBase + 0x00, tlsBase) &&
                context.TryWriteUInt64(tlsBase + 0x10, tlsBase) &&
-               context.TryWriteUInt64(tlsBase + 0x28, 0xC0DEC0DECAFEBABEUL);
+               context.TryWriteUInt64(tlsBase + 0x28, 0xC0DEC0DECAFEBABEUL) &&
+               context.TryWriteUInt64(tlsBase + 0x60, tlsBase);
+    }
+
+    private static bool InitializeGuestFrameChainSentinel(CpuContext context)
+    {
+        var stackTop = context[CpuRegister.Rsp] + sizeof(ulong);
+        var sentinelFrame = AlignDown(stackTop - 0x20, 16);
+        var seedRsp = sentinelFrame - sizeof(ulong);
+        if (!context.TryWriteUInt64(sentinelFrame, 0) ||
+            !context.TryWriteUInt64(sentinelFrame + sizeof(ulong), 0) ||
+            !context.TryWriteUInt64(seedRsp, 0))
+        {
+            return false;
+        }
+
+        context[CpuRegister.Rbp] = sentinelFrame;
+        context[CpuRegister.Rsp] = seedRsp;
+        return true;
     }
 
     private static bool InitializeProcessEntryFrame(
@@ -389,8 +415,8 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
 
         const ulong entryParamsSize = 0x20;
         var entryParamsAddress = AlignDown(argv0Address - entryParamsSize, 16);
-        if (!TryWriteUInt32(context, entryParamsAddress + 0x00, 1) ||
-            !TryWriteUInt32(context, entryParamsAddress + 0x04, 0) ||
+        if (!context.TryWriteUInt32(entryParamsAddress + 0x00, 1) ||
+            !context.TryWriteUInt32(entryParamsAddress + 0x04, 0) ||
             !context.TryWriteUInt64(entryParamsAddress + 0x08, argv0Address) ||
             !context.TryWriteUInt64(entryParamsAddress + 0x10, 0) ||
             !context.TryWriteUInt64(entryParamsAddress + 0x18, 0))
@@ -398,6 +424,13 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
             return false;
         }
 
+        var entryStackPointer = entryParamsAddress - sizeof(ulong);
+        if (!context.TryWriteUInt64(entryStackPointer, 0))
+        {
+            return false;
+        }
+
+        context[CpuRegister.Rsp] = entryStackPointer;
         context[CpuRegister.Rdi] = entryParamsAddress;
         context[CpuRegister.Rsi] = programExitHandlerAddress;
         context[CpuRegister.Rdx] = 0;
@@ -423,13 +456,6 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
         return value & ~(alignment - 1);
     }
 
-    private static bool TryWriteUInt32(CpuContext context, ulong address, uint value)
-    {
-        Span<byte> buffer = stackalloc byte[sizeof(uint)];
-        BinaryPrimitives.WriteUInt32LittleEndian(buffer, value);
-        return context.Memory.TryWrite(address, buffer);
-    }
-
     private static string BuildEntryFrameDiagnostic(
         ulong entryPoint,
         CpuContext context,

src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.Diagnostics.cs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
 using System.Runtime.InteropServices;
@@ -12,10 +13,23 @@ namespace SharpEmu.Core.Cpu.Native;
 
 public sealed partial class DirectExecutionBackend
 {
+	private static readonly ConcurrentDictionary<ulong, byte> _knownExecutablePages = new();
 
-	private void RecordRecentImportTrace(string traceLine)
+	private void RecordRecentImportTrace(
+		long dispatchIndex,
+		string nid,
+		ulong returnRip,
+		ulong arg0,
+		ulong arg1,
+		ulong arg2)
 	{
-		_recentImportTrace[_recentImportTraceWriteIndex] = traceLine;
+		_recentImportTrace[_recentImportTraceWriteIndex] = new RecentImportTraceEntry(
+			dispatchIndex,
+			nid,
+			returnRip,
+			arg0,
+			arg1,
+			arg2);
 		_recentImportTraceWriteIndex = (_recentImportTraceWriteIndex + 1) % _recentImportTrace.Length;
 		if (_recentImportTraceCount < _recentImportTrace.Length)
 		{
@@ -34,10 +48,12 @@ public sealed partial class DirectExecutionBackend
 		for (int i = 0; i < _recentImportTraceCount; i++)
 		{
 			int num2 = (num + i) % _recentImportTrace.Length;
-			string text = _recentImportTrace[num2];
-			if (!string.IsNullOrEmpty(text))
+			var entry = _recentImportTrace[num2];
+			if (!string.IsNullOrEmpty(entry.Nid))
 			{
-				Console.Error.WriteLine("[LOADER][INFO]     " + text);
+				Console.Error.WriteLine(
+					$"[LOADER][INFO]     #{entry.DispatchIndex} nid={entry.Nid} ret=0x{entry.ReturnRip:X16} " +
+					$"rdi=0x{entry.Arg0:X16} rsi=0x{entry.Arg1:X16} rdx=0x{entry.Arg2:X16}");
 			}
 		}
 	}
@@ -97,12 +113,13 @@ public sealed partial class DirectExecutionBackend
 
 	private void ProbeReturnRip(ulong returnRip, long dispatchIndex)
 	{
-		if (_cpuContext == null || returnRip == 0)
+		var cpuContext = ActiveCpuContext;
+		if (cpuContext == null || returnRip == 0)
 		{
 			return;
 		}
 		Span<byte> destination = stackalloc byte[128];
-		if (!_cpuContext.Memory.TryRead(returnRip, destination))
+		if (!cpuContext.Memory.TryRead(returnRip, destination))
 		{
 			Console.Error.WriteLine($"[LOADER][TRACE] Import#{dispatchIndex} return-rip probe: unreadable @0x{returnRip:X16}");
 			return;
@@ -113,7 +130,7 @@ public sealed partial class DirectExecutionBackend
 		{
 			int num = BitConverter.ToInt32(destination.Slice(2, 4));
 			ulong num2 = returnRip + 6 + (ulong)num;
-			if (_cpuContext.TryReadUInt64(num2, out var value2))
+			if (cpuContext.TryReadUInt64(num2, out var value2))
 			{
 				Console.Error.WriteLine($"[LOADER][TRACE] Import#{dispatchIndex} return-rip slot: [0x{num2:X16}] = 0x{value2:X16}");
 			}
@@ -122,7 +139,7 @@ public sealed partial class DirectExecutionBackend
 		{
 			int num3 = BitConverter.ToInt32(destination.Slice(3, 4));
 			ulong num4 = returnRip + 7 + (ulong)num3;
-			if (_cpuContext.TryReadUInt64(num4, out var value3))
+			if (cpuContext.TryReadUInt64(num4, out var value3))
 			{
 				Console.Error.WriteLine($"[LOADER][TRACE] Import#{dispatchIndex} return-rip mov-slot: [0x{num4:X16}] = 0x{value3:X16}");
 			}
@@ -134,12 +151,82 @@ public sealed partial class DirectExecutionBackend
 				int num5 = BitConverter.ToInt32(destination.Slice(i + 2, 4));
 				ulong num6 = returnRip + (ulong)i;
 				ulong num7 = num6 + 6 + (ulong)num5;
-				if (_cpuContext.TryReadUInt64(num7, out var value4))
+				if (cpuContext.TryReadUInt64(num7, out var value4))
 				{
 					Console.Error.WriteLine($"[LOADER][TRACE] Import#{dispatchIndex} near-indirect @{num6:X16}: slot=0x{num7:X16} val=0x{value4:X16}");
 				}
 			}
 		}
+		Span<byte> targetBytes = stackalloc byte[32];
+		for (int i = 0; i + 5 <= destination.Length; i++)
+		{
+			if (destination[i] != 0xE8)
+			{
+				continue;
+			}
+
+			int rel32 = BitConverter.ToInt32(destination.Slice(i + 1, 4));
+			ulong callRip = returnRip + (ulong)i;
+			ulong target = unchecked((ulong)((long)(callRip + 5) + rel32));
+			Console.Error.WriteLine($"[LOADER][TRACE] Import#{dispatchIndex} near-call @{callRip:X16}: target=0x{target:X16}");
+			for (int importIndex = 0; importIndex < _importEntries.Length; importIndex++)
+			{
+				if (_importEntries[importIndex].Address != target)
+				{
+					continue;
+				}
+
+				string nid = _importEntries[importIndex].Nid;
+				if (_moduleManager.TryGetExport(nid, out var export))
+				{
+					Console.Error.WriteLine(
+						$"[LOADER][TRACE] Import#{dispatchIndex} near-call import: index={importIndex} {export.LibraryName}:{export.Name} ({nid})");
+				}
+				else
+				{
+					Console.Error.WriteLine(
+						$"[LOADER][TRACE] Import#{dispatchIndex} near-call import: index={importIndex} nid={nid}");
+				}
+				break;
+			}
+
+			if (cpuContext.Memory.TryRead(target, targetBytes))
+			{
+				Console.Error.WriteLine(
+					$"[LOADER][TRACE] Import#{dispatchIndex} near-call target bytes @0x{target:X16}: " +
+					BitConverter.ToString(targetBytes.ToArray()).Replace("-", " "));
+				if (targetBytes[0] == 0xFF && targetBytes[1] == 0x25)
+				{
+					int slotRel32 = BitConverter.ToInt32(targetBytes.Slice(2, 4));
+					ulong slot = unchecked((ulong)((long)(target + 6) + slotRel32));
+					if (cpuContext.TryReadUInt64(slot, out var slotTarget))
+					{
+						Console.Error.WriteLine(
+							$"[LOADER][TRACE] Import#{dispatchIndex} near-call PLT slot: [0x{slot:X16}] = 0x{slotTarget:X16}");
+						for (int importIndex = 0; importIndex < _importEntries.Length; importIndex++)
+						{
+							if (_importEntries[importIndex].Address != slotTarget)
+							{
+								continue;
+							}
+
+							string nid = _importEntries[importIndex].Nid;
+							if (_moduleManager.TryGetExport(nid, out var export))
+							{
+								Console.Error.WriteLine(
+									$"[LOADER][TRACE] Import#{dispatchIndex} near-call PLT import: index={importIndex} {export.LibraryName}:{export.Name} ({nid})");
+							}
+							else
+							{
+								Console.Error.WriteLine(
+									$"[LOADER][TRACE] Import#{dispatchIndex} near-call PLT import: index={importIndex} nid={nid}");
+							}
+							break;
+						}
+					}
+				}
+			}
+		}
 	}
 
 	private static bool IsUnresolvedSentinel(ulong value)
@@ -231,11 +318,24 @@ public sealed partial class DirectExecutionBackend
 
 	private unsafe static bool IsExecutableAddress(ulong address)
 	{
+		var pageAddress = address & ~0xFFFUL;
+		if (_knownExecutablePages.ContainsKey(pageAddress))
+		{
+			return true;
+		}
+
 		if (VirtualQuery((void*)address, out var lpBuffer, (nuint)sizeof(MEMORY_BASIC_INFORMATION64)) == 0)
 		{
 			return false;
 		}
-		return lpBuffer.State == 4096 && IsExecutableProtection(lpBuffer.Protect);
+
+		var executable = lpBuffer.State == 4096 && IsExecutableProtection(lpBuffer.Protect);
+		if (executable)
+		{
+			_knownExecutablePages.TryAdd(pageAddress, 0);
+		}
+
+		return executable;
 	}
 
 	private static ulong AlignUp(ulong value, ulong alignment)

src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.Exceptions.cs

@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using System.Globalization;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using System.Threading;
 using SharpEmu.Core.Cpu.Disasm;
 using SharpEmu.HLE;
 
@@ -14,11 +15,19 @@ namespace SharpEmu.Core.Cpu.Native;
 
 public sealed partial class DirectExecutionBackend
 {
+	private const ulong LazyCommitWindowBytes = 0x0200_0000UL;
+	private static int _lazyCommitTraceCount;
+
 	private unsafe void SetupExceptionHandler()
 	{
 		if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_DISABLE_RAW_HANDLER"), "1", StringComparison.Ordinal))
 		{
-			_rawExceptionHandler = (nint)AddVectoredExceptionHandler(1u, RawVectoredHandlerPtrManaged);
+			_rawExceptionHandlerStub = CreateExceptionHandlerTrampoline(RawVectoredHandlerPtrManaged);
+			if (_rawExceptionHandlerStub == 0)
+			{
+				throw new InvalidOperationException("Failed to create raw exception handler trampoline");
+			}
+			_rawExceptionHandler = (nint)AddVectoredExceptionHandler(1u, _rawExceptionHandlerStub);
 			Console.Error.WriteLine($"[LOADER][INFO] Raw exception handler installed: 0x{_rawExceptionHandler:X16}");
 		}
 		else
@@ -28,12 +37,22 @@ public sealed partial class DirectExecutionBackend
 
 		_handlerDelegate = VectoredHandler;
 		_handlerHandle = GCHandle.Alloc(_handlerDelegate);
-		_exceptionHandler = (nint)AddVectoredExceptionHandler(1u, Marshal.GetFunctionPointerForDelegate(_handlerDelegate));
+		_exceptionHandlerStub = CreateExceptionHandlerTrampoline(Marshal.GetFunctionPointerForDelegate(_handlerDelegate));
+		if (_exceptionHandlerStub == 0)
+		{
+			throw new InvalidOperationException("Failed to create exception handler trampoline");
+		}
+		_exceptionHandler = (nint)AddVectoredExceptionHandler(1u, _exceptionHandlerStub);
 		Console.Error.WriteLine($"[LOADER][INFO] Exception handler installed: 0x{_exceptionHandler:X16}");
 
 		_unhandledFilterDelegate = UnhandledExceptionFilter;
 		_unhandledFilterHandle = GCHandle.Alloc(_unhandledFilterDelegate);
-		SetUnhandledExceptionFilter(Marshal.GetFunctionPointerForDelegate(_unhandledFilterDelegate));
+		_unhandledFilterStub = CreateExceptionHandlerTrampoline(Marshal.GetFunctionPointerForDelegate(_unhandledFilterDelegate));
+		if (_unhandledFilterStub == 0)
+		{
+			throw new InvalidOperationException("Failed to create unhandled exception filter trampoline");
+		}
+		SetUnhandledExceptionFilter(_unhandledFilterStub);
 	}
 
 	private unsafe int UnhandledExceptionFilter(void* exceptionInfo)
@@ -61,7 +80,7 @@ public sealed partial class DirectExecutionBackend
 	{
 		if (_vectoredHandlerDepth > 0)
 		{
-			Console.Error.WriteLine("[LOADER][TRACE] Nested VEH exception; passing through.");
+			LogNestedVectoredException(exceptionInfo);
 			Console.Error.Flush();
 			return 0;
 		}
@@ -84,10 +103,18 @@ public sealed partial class DirectExecutionBackend
 			ulong rip = ReadCtxU64(contextRecord, 248);
 			ulong rsp = ReadCtxU64(contextRecord, 152);
 
-			if (exceptionCode == 3221225477u && TryHandleLazyCommittedPage(exceptionRecord))
+			if (exceptionCode == 3221225477u && TryHandleLazyCommittedPage(exceptionRecord, rip, rsp))
 			{
 				return -1;
 			}
+			if (IsBenignHostDebugException(exceptionCode))
+			{
+				return -1;
+			}
+			if (exceptionCode == MSVC_CPP_EXCEPTION)
+			{
+				return 0;
+			}
 
 			switch (exceptionCode)
 			{
@@ -278,6 +305,37 @@ public sealed partial class DirectExecutionBackend
 		}
 	}
 
+	private static bool IsBenignHostDebugException(uint exceptionCode)
+	{
+		return exceptionCode is DBG_PRINTEXCEPTION_C or DBG_PRINTEXCEPTION_WIDE_C or MS_VC_THREADNAME_EXCEPTION;
+	}
+
+	private unsafe static void LogNestedVectoredException(void* exceptionInfo)
+	{
+		int count = Interlocked.Increment(ref _nestedVehTraceCount);
+		if (count > 16 && count % 128 != 0)
+		{
+			return;
+		}
+
+		try
+		{
+			EXCEPTION_POINTERS* pointers = (EXCEPTION_POINTERS*)exceptionInfo;
+			EXCEPTION_RECORD* record = pointers->ExceptionRecord;
+			void* contextRecord = pointers->ContextRecord;
+			ulong rip = contextRecord != null ? ReadCtxU64(contextRecord, 248) : 0;
+			ulong rsp = contextRecord != null ? ReadCtxU64(contextRecord, 152) : 0;
+			ulong accessType = record->NumberParameters >= 1 ? *record->ExceptionInformation : 0;
+			ulong target = record->NumberParameters >= 2 ? record->ExceptionInformation[1] : 0;
+			Console.Error.WriteLine(
+				$"[LOADER][TRACE] Nested VEH exception#{count}: code=0x{record->ExceptionCode:X8} ex=0x{(ulong)record->ExceptionAddress:X16} rip=0x{rip:X16} rsp=0x{rsp:X16} type={accessType} target=0x{target:X16}; passing through.");
+		}
+		catch
+		{
+			Console.Error.WriteLine($"[LOADER][TRACE] Nested VEH exception#{count}; passing through.");
+		}
+	}
+
 	private unsafe void LogAccessViolationTrace(ulong exceptionAddress, EXCEPTION_RECORD* exceptionRecord)
 	{
 		ulong accessType = exceptionRecord->NumberParameters >= 1 ? (*exceptionRecord->ExceptionInformation) : 0;
@@ -828,7 +886,7 @@ public sealed partial class DirectExecutionBackend
 		return true;
 	}
 
-	private unsafe static bool TryHandleLazyCommittedPage(EXCEPTION_RECORD* exceptionRecord)
+	private unsafe bool TryHandleLazyCommittedPage(EXCEPTION_RECORD* exceptionRecord, ulong rip, ulong rsp)
 	{
 		if (exceptionRecord->NumberParameters < 2)
 		{
@@ -845,6 +903,10 @@ public sealed partial class DirectExecutionBackend
 		{
 			return false;
 		}
+		if (!IsGuestOwnedLazyCommitAddress(faultAddress, out var owner))
+		{
+			return false;
+		}
 		if (VirtualQuery((void*)faultAddress, out var mbi, (nuint)sizeof(MEMORY_BASIC_INFORMATION64)) == 0)
 		{
 			return false;
@@ -852,7 +914,21 @@ public sealed partial class DirectExecutionBackend
 
 		ulong pageBase = faultAddress & 0xFFFFFFFFFFFFF000uL;
 		uint commitProtect = ResolveLazyCommitProtection(accessType, mbi.AllocationProtect);
-		Console.Error.WriteLine($"[LOADER][TRACE] lazy-query: fault=0x{faultAddress:X16} state=0x{mbi.State:X08} base=0x{mbi.BaseAddress:X16} size=0x{mbi.RegionSize:X16} alloc=0x{mbi.AllocationProtect:X08} prot=0x{mbi.Protect:X08}");
+		int traceIndex = Interlocked.Increment(ref _lazyCommitTraceCount);
+		bool traceLazyCommit = ShouldTraceLazyCommit(traceIndex);
+		if (traceLazyCommit)
+		{
+			Console.Error.WriteLine($"[LOADER][TRACE] lazy-query#{traceIndex}: fault=0x{faultAddress:X16} owner={owner} rip=0x{rip:X16} rsp=0x{rsp:X16} state=0x{mbi.State:X08} base=0x{mbi.BaseAddress:X16} size=0x{mbi.RegionSize:X16} alloc=0x{mbi.AllocationProtect:X08} prot=0x{mbi.Protect:X08}");
+		}
+
+		if (mbi.State == 4096 && IsAccessCompatible(accessType, mbi.Protect))
+		{
+			if (traceLazyCommit)
+			{
+				Console.Error.WriteLine($"[LOADER][TRACE] lazy-commit-race#{traceIndex}: fault=0x{faultAddress:X16} protect=0x{mbi.Protect:X08}");
+			}
+			return true;
+		}
 
 		bool committed = false;
 		ulong committedBase = 0;
@@ -860,14 +936,25 @@ public sealed partial class DirectExecutionBackend
 
 		if (mbi.State == 65536)
 		{
-			ulong largeBase = faultAddress & 0xFFFFFFFFFFE00000uL;
-			if (TryReserveThenCommit(largeBase, 2097152uL, largeBase, 2097152uL, commitProtect))
+			if (TryGetLazyCommitWindow(faultAddress, mbi.BaseAddress, mbi.RegionSize, out var windowBase, out var windowSize) &&
+				TryReserveThenCommit(windowBase, windowSize, windowBase, windowSize, commitProtect))
 			{
 				committed = true;
-				committedBase = largeBase;
-				committedSize = 2097152uL;
+				committedBase = windowBase;
+				committedSize = windowSize;
 			}
 			else
+			{
+				ulong largeBase = faultAddress & 0xFFFFFFFFFFE00000uL;
+				if (TryReserveThenCommit(largeBase, 2097152uL, largeBase, 2097152uL, commitProtect))
+				{
+					committed = true;
+					committedBase = largeBase;
+					committedSize = 2097152uL;
+				}
+			}
+
+			if (!committed)
 			{
 				ulong region64kBase = faultAddress & 0xFFFFFFFFFFFF0000uL;
 				if (TryReserveThenCommit(region64kBase, 65536uL, region64kBase, 65536uL, commitProtect))
@@ -890,7 +977,10 @@ public sealed partial class DirectExecutionBackend
 			}
 
 			TryCommitRange(pageBase + 4096, 4096uL, commitProtect);
-			Console.Error.WriteLine($"[LOADER][TRACE] lazy-reserve-commit: addr=0x{committedBase:X16} size=0x{committedSize:X16} access={accessType} protect=0x{commitProtect:X8}");
+			if (traceLazyCommit)
+			{
+				Console.Error.WriteLine($"[LOADER][TRACE] lazy-reserve-commit#{traceIndex}: addr=0x{committedBase:X16} size=0x{committedSize:X16} access={accessType} protect=0x{commitProtect:X8}");
+			}
 			return true;
 		}
 
@@ -899,14 +989,25 @@ public sealed partial class DirectExecutionBackend
 			return false;
 		}
 
-		ulong largeCommitBase = faultAddress & 0xFFFFFFFFFFE00000uL;
-		if (TryCommitRange(largeCommitBase, 2097152uL, commitProtect))
+		if (TryGetLazyCommitWindow(faultAddress, mbi.BaseAddress, mbi.RegionSize, out var commitWindowBase, out var commitWindowSize) &&
+			TryCommitRange(commitWindowBase, commitWindowSize, commitProtect))
 		{
 			committed = true;
-			committedBase = largeCommitBase;
-			committedSize = 2097152uL;
+			committedBase = commitWindowBase;
+			committedSize = commitWindowSize;
 		}
 		else
+		{
+			ulong largeCommitBase = faultAddress & 0xFFFFFFFFFFE00000uL;
+			if (TryCommitRange(largeCommitBase, 2097152uL, commitProtect))
+			{
+				committed = true;
+				committedBase = largeCommitBase;
+				committedSize = 2097152uL;
+			}
+		}
+
+		if (!committed)
 		{
 			ulong region64kBase = faultAddress & 0xFFFFFFFFFFFF0000uL;
 			if (TryCommitRange(region64kBase, 65536uL, commitProtect))
@@ -935,9 +1036,46 @@ public sealed partial class DirectExecutionBackend
 		}
 
 		TryCommitRange(pageBase + 4096, 4096uL, commitProtect);
-		Console.Error.WriteLine($"[LOADER][TRACE] lazy-commit: addr=0x{committedBase:X16} size=0x{committedSize:X16} access={accessType} protect=0x{commitProtect:X8}");
+		if (traceLazyCommit)
+		{
+			Console.Error.WriteLine($"[LOADER][TRACE] lazy-commit#{traceIndex}: addr=0x{committedBase:X16} size=0x{committedSize:X16} access={accessType} protect=0x{commitProtect:X8}");
+		}
 		return true;
 
+		static bool TryGetLazyCommitWindow(ulong fault, ulong regionBase, ulong regionSize, out ulong baseAddress, out ulong length)
+		{
+			baseAddress = 0;
+			length = 0;
+			if (regionSize == 0 || ulong.MaxValue - regionBase < regionSize)
+			{
+				return false;
+			}
+
+			ulong regionEnd = regionBase + regionSize;
+			ulong windowBase = fault & ~(LazyCommitWindowBytes - 1);
+			if (windowBase < regionBase)
+			{
+				windowBase = regionBase;
+			}
+
+			if (windowBase >= regionEnd)
+			{
+				return false;
+			}
+
+			ulong windowEnd = Math.Min(regionEnd, windowBase + LazyCommitWindowBytes);
+			ulong windowSize = windowEnd - windowBase;
+			windowSize &= 0xFFFFFFFFFFFFF000uL;
+			if (windowSize == 0)
+			{
+				return false;
+			}
+
+			baseAddress = windowBase;
+			length = windowSize;
+			return true;
+		}
+
 		static unsafe bool TryCommitRange(ulong baseAddress, ulong length, uint protection)
 		{
 			if (length == 0)
@@ -964,6 +1102,49 @@ public sealed partial class DirectExecutionBackend
 			}
 			return TryCommitRange(commitAddress, commitSize, protection);
 		}
+
+		static bool IsAccessCompatible(ulong accessType, uint protection)
+		{
+			const uint pageNoAccess = 0x01;
+			const uint pageReadOnly = 0x02;
+			const uint pageReadWrite = 0x04;
+			const uint pageWriteCopy = 0x08;
+			const uint pageExecute = 0x10;
+			const uint pageExecuteRead = 0x20;
+			const uint pageExecuteReadWrite = 0x40;
+			const uint pageExecuteWriteCopy = 0x80;
+			const uint pageGuard = 0x100;
+			const uint accessMask = 0xFF;
+
+			if ((protection & pageGuard) != 0)
+			{
+				return false;
+			}
+
+			uint access = protection & accessMask;
+			if (access == pageNoAccess)
+			{
+				return false;
+			}
+
+			return accessType switch
+			{
+				0 => access is pageReadOnly or pageReadWrite or pageWriteCopy or pageExecuteRead or pageExecuteReadWrite or pageExecuteWriteCopy,
+				1 => access is pageReadWrite or pageWriteCopy or pageExecuteReadWrite or pageExecuteWriteCopy,
+				8 => access is pageExecute or pageExecuteRead or pageExecuteReadWrite or pageExecuteWriteCopy,
+				_ => false
+			};
+		}
+	}
+
+	private static bool ShouldTraceLazyCommit(int traceIndex)
+	{
+		if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_LAZY_COMMIT"), "1", StringComparison.Ordinal))
+		{
+			return true;
+		}
+
+		return traceIndex <= 16 || traceIndex % 256 == 0;
 	}
 
 	private static uint ResolveLazyCommitProtection(ulong accessType, uint allocationProtect)

src/SharpEmu.Core/Cpu/TrackedCpuMemory.cs

@@ -5,7 +5,7 @@ using SharpEmu.HLE;
 
 namespace SharpEmu.Core.Cpu;
 
-public sealed class TrackedCpuMemory : ICpuMemory, ITrackedCpuMemory
+public sealed class TrackedCpuMemory : ICpuMemory, ITrackedCpuMemory, IGuestMemoryAllocator
 {
     private readonly ICpuMemory _inner;
 
@@ -39,4 +39,15 @@ public sealed class TrackedCpuMemory : ICpuMemory, ITrackedCpuMemory
 
         return result;
     }
+
+    public bool TryAllocateGuestMemory(ulong size, ulong alignment, out ulong address)
+    {
+        if (_inner is IGuestMemoryAllocator allocator)
+        {
+            return allocator.TryAllocateGuestMemory(size, alignment, out address);
+        }
+
+        address = 0;
+        return false;
+    }
 }

src/SharpEmu.Core/Loader/SelfImage.cs

@@ -21,7 +21,10 @@ public sealed class SelfImage
         IReadOnlyList<ulong>? initializerFunctions = null,
         ulong initFunctionEntryPoint = 0,
         ulong imageBase = 0,
-        ulong procParamAddress = 0)
+        ulong procParamAddress = 0,
+        string? title = null,
+        string? titleId = null,
+        string? version = null)
     {
         ArgumentNullException.ThrowIfNull(programHeaders);
         ArgumentNullException.ThrowIfNull(mappedRegions);
@@ -38,6 +41,9 @@ public sealed class SelfImage
         InitFunctionEntryPoint = initFunctionEntryPoint;
         _imageBase = imageBase;
         ProcParamAddress = procParamAddress;
+        Title = title;
+        TitleId = titleId;
+        Version = version;
     }
 
     public bool IsSelf { get; }
@@ -63,4 +69,10 @@ public sealed class SelfImage
     public ulong EntryPoint => ElfHeader.EntryPoint + _imageBase;
 
     public ulong ProcParamAddress { get; }
+
+    public string? Title { get; }
+
+    public string? TitleId { get; }
+
+    public string? Version { get; }
 }

src/SharpEmu.Core/Loader/SelfLoader.cs

@@ -144,10 +144,9 @@ public sealed class SelfLoader : ISelfLoader
             throw new InvalidDataException("Input image is empty.");
         }
 
-        if (readParamJson)
-        {
-            TryLoadParamJson(fs, mountRoot);
-        }
+        var applicationInfo = readParamJson
+            ? TryLoadParamJson(fs, mountRoot)
+            : default;
 
         if (clearVirtualMemory)
         {
@@ -270,15 +269,20 @@ public sealed class SelfLoader : ISelfLoader
             initializerFunctions,
             initFunctionEntryPoint,
             imageBase,
-            procParamAddress);
+            procParamAddress,
+            applicationInfo.Title,
+            applicationInfo.TitleId,
+            applicationInfo.Version);
     }
 
-    private static void TryLoadParamJson(IFileSystem? fs, string? mountRoot)
+    private static (string? Title, string? TitleId, string? Version) TryLoadParamJson(
+        IFileSystem? fs,
+        string? mountRoot)
     {
         if (fs == null)
         {
             Console.WriteLine("[LOADER] param.json not found (no filesystem provided).");
-            return;
+            return default;
         }
 
         string[] possiblePaths = string.IsNullOrEmpty(mountRoot)
@@ -298,12 +302,16 @@ public sealed class SelfLoader : ISelfLoader
         if (foundPath == null)
         {
             Console.WriteLine("[LOADER] param.json not found (no root path / unknown layout).");
-            return;
+            return default;
         }
 
-        var (title, titleId, ver) = Ps5ParamJsonReader.TryReadPs5Param(fs, foundPath);
+        var applicationInfo = Ps5ParamJsonReader.TryReadPs5Param(fs, foundPath);
         Console.WriteLine($"[LOADER] Loading param.json at {foundPath}");
-        Console.WriteLine($"[LOADER] Title: {title ?? "(unknown)"}, TitleId: {titleId ?? "(unknown)"}, Version: {ver ?? "(unknown)"}");
+        Console.WriteLine(
+            $"[LOADER] Title: {applicationInfo.Title ?? "(unknown)"}, " +
+            $"TitleId: {applicationInfo.TitleId ?? "(unknown)"}, " +
+            $"Version: {applicationInfo.Version ?? "(unknown)"}");
+        return applicationInfo;
     }
 
     private static LoadContext ParseLayout(ReadOnlySpan<byte> imageData)

src/SharpEmu.Core/Memory/PhysicalVirtualMemory.cs

@@ -7,15 +7,22 @@ using SharpEmu.HLE;
 
 namespace SharpEmu.Core.Memory;
 
-public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
+public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryAllocator, IDisposable
 {
-    private readonly object _gate = new();
+    private readonly ReaderWriterLockSlim _gate = new(LockRecursionPolicy.SupportsRecursion);
+    private readonly object _guestAllocationGate = new();
+    private readonly object _allocationSearchHintGate = new();
     private readonly List<MemoryRegion> _regions = new();
+    private readonly Dictionary<(ulong DesiredAddress, ulong Alignment, bool Executable), ulong> _allocationSearchHints = new();
     private readonly Dictionary<ulong, ProgramHeaderFlags> _pageProtections = new();
     private bool _disposed;
     private const ulong PageSize = 0x1000;
+    private const ulong GuestAllocationArenaAddress = 0x00006000_0000_0000;
+    private const ulong GuestAllocationArenaSize = 0x0100_0000;
+    private const ulong GuestAllocationArenaStartOffset = PageSize;
     private const ulong LargeDataReserveThreshold = 0x4000_0000UL; // 1 GiB
-    private const ulong LazyReservePrimeBytes = 0x5000_0000UL; // 1.25 GiB
+    private const ulong FullCommitRegionLimit = 4UL << 30;
+    private const ulong DefaultLazyReservePrimeBytes = 0x0400_0000UL; // 64 MiB
     private const ulong LazyReservePrimeChunkBytes = 0x0200_0000UL; // 32 MiB
 
     private const uint MEM_COMMIT = 0x1000;
@@ -29,6 +36,10 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
     private const uint PAGE_READWRITE = 0x04;
     private const uint PAGE_READONLY = 0x02;
 
+    private ulong _guestAllocationArenaBase;
+    private ulong _guestAllocationOffset;
+    private static readonly ulong LazyReservePrimeBytes = ResolveLazyReservePrimeBytes();
+
     [DllImport("kernel32.dll", SetLastError = true)]
     private static extern void* VirtualAlloc(void* lpAddress, nuint dwSize, uint flAllocationType, uint flProtect);
 
@@ -40,6 +51,9 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
     [return: MarshalAs(UnmanagedType.Bool)]
     private static extern bool VirtualProtect(void* lpAddress, nuint dwSize, uint flNewProtect, out uint lpflOldProtect);
 
+    [DllImport("kernel32.dll")]
+    private static extern nuint VirtualQuery(void* lpAddress, out MemoryBasicInformation64 lpBuffer, nuint dwLength);
+
     [DllImport("kernel32.dll")]
     private static extern void FlushInstructionCache(void* hProcess, void* lpBaseAddress, nuint dwSize);
 
@@ -68,9 +82,10 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
             return false;
         }
 
-        lock (_gate)
+        _gate.EnterWriteLock();
+        try
         {
-            _regions.Add(new MemoryRegion
+            InsertRegionSorted(new MemoryRegion
             {
                 VirtualAddress = actualAddress,
                 Size = alignedSize,
@@ -79,9 +94,13 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
                 Protection = protection
             });
         }
+        finally
+        {
+            _gate.ExitWriteLock();
+        }
 
         var allocationKind = executable ? "executable memory" : "data memory";
-        Console.Error.WriteLine($"[VMEM] Allocated exact {allocationKind}: 0x{actualAddress:X16} - 0x{actualAddress + alignedSize:X16} ({alignedSize} bytes)");
+        TraceVmem($"Allocated exact {allocationKind}: 0x{actualAddress:X16} - 0x{actualAddress + alignedSize:X16} ({alignedSize} bytes)");
         return true;
     }
 
@@ -95,7 +114,9 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
         var protection = executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
         var allocationType = MEM_COMMIT | MEM_RESERVE;
         var reservedOnly = false;
-        var preferReserveOnly = !executable && alignedSize >= LargeDataReserveThreshold;
+        var preferReserveOnly = !executable &&
+            alignedSize >= LargeDataReserveThreshold &&
+            alignedSize > FullCommitRegionLimit;
 
         void* result = null;
         if (preferReserveOnly)
@@ -124,7 +145,7 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
                 throw new InvalidOperationException($"Failed to allocate exact mapping at 0x{desiredAddress:X16} ({alignedSize} bytes)");
             }
 
-            Console.Error.WriteLine($"[VMEM] Could not allocate at 0x{desiredAddress:X16}, trying any address...");
+            TraceVmem($"Could not allocate at 0x{desiredAddress:X16}, trying any address...");
             result = VirtualAlloc(null, (nuint)alignedSize, allocationType, protection);
 
             if (result == null)
@@ -178,12 +199,12 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
                     lazyPrimeState = committedBytes == primeBytes
                         ? $"ok:{committedBytes:X}"
                         : $"partial:{committedBytes:X}/{primeBytes:X}";
-                    Console.Error.WriteLine($"[VMEM] Primed lazy region: 0x{actualAddress:X16} - 0x{actualAddress + committedBytes:X16} ({committedBytes} bytes)");
+                    TraceVmem($"Primed lazy region: 0x{actualAddress:X16} - 0x{actualAddress + committedBytes:X16} ({committedBytes} bytes)");
                 }
                 else
                 {
                     lazyPrimeState = $"fail:{primeBytes:X}";
-                    Console.Error.WriteLine($"[VMEM] Failed to prime lazy region at 0x{actualAddress:X16} ({primeBytes} bytes), continuing with on-demand commit");
+                    TraceVmem($"Failed to prime lazy region at 0x{actualAddress:X16} ({primeBytes} bytes), continuing with on-demand commit");
                 }
             }
             else
@@ -192,9 +213,10 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
             }
         }
 
-        lock (_gate)
+        _gate.EnterWriteLock();
+        try
         {
-            _regions.Add(new MemoryRegion
+            InsertRegionSorted(new MemoryRegion
             {
                 VirtualAddress = actualAddress,
                 Size = alignedSize,
@@ -203,25 +225,135 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
                 Protection = protection
             });
         }
+        finally
+        {
+            _gate.ExitWriteLock();
+        }
 
         var allocationKind = reservedOnly
             ? "reserved data memory (lazy commit)"
             : (executable ? "executable memory" : "data memory");
-        Console.Error.WriteLine($"[VMEM] Allocated {allocationKind}: 0x{actualAddress:X16} - 0x{actualAddress + alignedSize:X16} ({alignedSize} bytes) lazy_prime={lazyPrimeState}");
+        TraceVmem($"Allocated {allocationKind}: 0x{actualAddress:X16} - 0x{actualAddress + alignedSize:X16} ({alignedSize} bytes) lazy_prime={lazyPrimeState}");
 
         return actualAddress;
     }
 
+    public bool TryAllocateAtOrAbove(
+        ulong desiredAddress,
+        ulong size,
+        bool executable,
+        ulong alignment,
+        out ulong actualAddress)
+    {
+        actualAddress = 0;
+        if (size == 0)
+        {
+            return false;
+        }
+
+        var alignedSize = AlignUp(size, PageSize);
+        var effectiveAlignment = Math.Max(PageSize, alignment == 0 ? PageSize : alignment);
+        var requestedCursor = AlignUp(desiredAddress, effectiveAlignment);
+        var cursor = GetAllocationSearchCursor(desiredAddress, requestedCursor, effectiveAlignment, executable);
+
+        for (var attempt = 0; attempt < 0x10000; attempt++)
+        {
+            if (cursor == 0 || ulong.MaxValue - cursor < alignedSize)
+            {
+                return false;
+            }
+
+            if (TryGetOverlappingRegionEnd(cursor, alignedSize, out var overlapEnd))
+            {
+                cursor = AlignUp(overlapEnd, effectiveAlignment);
+                continue;
+            }
+
+            try
+            {
+                actualAddress = AllocateAt(cursor, alignedSize, executable, allowAlternative: false);
+                if (actualAddress == cursor)
+                {
+                    UpdateAllocationSearchCursor(desiredAddress, effectiveAlignment, executable, actualAddress + alignedSize);
+                    return true;
+                }
+
+                actualAddress = 0;
+            }
+            catch
+            {
+            }
+
+            cursor = AlignUp(cursor + effectiveAlignment, effectiveAlignment);
+        }
+
+        return false;
+    }
+
+    public bool TryAllocateGuestMemory(ulong size, ulong alignment, out ulong address)
+    {
+        address = 0;
+        if (size == 0 || alignment == 0 || (alignment & (alignment - 1)) != 0)
+        {
+            return false;
+        }
+
+        lock (_guestAllocationGate)
+        {
+            if (_guestAllocationArenaBase == 0)
+            {
+                try
+                {
+                    _guestAllocationArenaBase = AllocateAt(
+                        GuestAllocationArenaAddress,
+                        GuestAllocationArenaSize,
+                        executable: false,
+                        allowAlternative: true);
+                    _guestAllocationOffset = GuestAllocationArenaStartOffset;
+                }
+                catch (Exception)
+                {
+                    return false;
+                }
+            }
+
+            var alignedOffset = AlignUp(_guestAllocationOffset, alignment);
+            if (alignedOffset > GuestAllocationArenaSize || size > GuestAllocationArenaSize - alignedOffset)
+            {
+                return false;
+            }
+
+            address = _guestAllocationArenaBase + alignedOffset;
+            _guestAllocationOffset = alignedOffset + size;
+            return true;
+        }
+    }
+
     public void Clear()
     {
-        lock (_gate)
+        lock (_guestAllocationGate)
         {
-            foreach (var region in _regions)
+            _gate.EnterWriteLock();
+            try
             {
-                VirtualFree((void*)region.VirtualAddress, 0, MEM_RELEASE);
+                foreach (var region in _regions)
+                {
+                    VirtualFree((void*)region.VirtualAddress, 0, MEM_RELEASE);
+                }
+                _regions.Clear();
+                _pageProtections.Clear();
+                lock (_allocationSearchHintGate)
+                {
+                    _allocationSearchHints.Clear();
+                }
             }
-            _regions.Clear();
-            _pageProtections.Clear();
+            finally
+            {
+                _gate.ExitWriteLock();
+            }
+
+            _guestAllocationArenaBase = 0;
+            _guestAllocationOffset = 0;
         }
     }
 
@@ -238,7 +370,8 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
         var mapEnd = AlignUp(segmentEnd, PageSize);
         var mapSize = checked(mapEnd - mapStart);
 
-        lock (_gate)
+        _gate.EnterWriteLock();
+        try
         {
             var existingRegion = FindRegion(mapStart, mapSize);
             if (existingRegion == null)
@@ -269,7 +402,11 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
 
             ApplySegmentProtection(mapStart, mapEnd, protection);
 
-            Console.Error.WriteLine($"[VMEM] Mapped segment: 0x{virtualAddress:X16} - 0x{virtualAddress + memorySize:X16} (file: {fileData.Length} bytes, prot: {protection})");
+            TraceVmem($"Mapped segment: 0x{virtualAddress:X16} - 0x{virtualAddress + memorySize:X16} (file: {fileData.Length} bytes, prot: {protection})");
+        }
+        finally
+        {
+            _gate.ExitWriteLock();
         }
     }
 
@@ -320,7 +457,8 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
 
     public IReadOnlyList<VirtualMemoryRegion> SnapshotRegions()
     {
-        lock (_gate)
+        _gate.EnterReadLock();
+        try
         {
             var snapshot = new VirtualMemoryRegion[_regions.Count];
             for (var i = 0; i < _regions.Count; i++)
@@ -335,86 +473,240 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
             }
             return snapshot;
         }
+        finally
+        {
+            _gate.ExitReadLock();
+        }
     }
 
     public bool TryRead(ulong virtualAddress, Span<byte> destination)
     {
-        lock (_gate)
+        var requiresExclusiveAccess = false;
+        _gate.EnterReadLock();
+        try
         {
-            foreach (var region in _regions)
+            var region = FindRegion(virtualAddress, (ulong)destination.Length);
+            if (region is not null &&
+                TryResolveRegionOffset(
+                    virtualAddress,
+                    (ulong)destination.Length,
+                    region,
+                    out var offset))
             {
-                if (TryResolveRegionOffset(virtualAddress, (ulong)destination.Length, region, out var offset))
+                var srcPtr = (void*)(region.VirtualAddress + offset);
+                if (destination.IsEmpty)
                 {
-                    var srcPtr = (void*)(region.VirtualAddress + offset);
-                    if (destination.IsEmpty)
-                    {
-                        return true;
-                    }
+                    return true;
+                }
 
-                    if (!TryTemporarilyProtectForRead((ulong)srcPtr, (ulong)destination.Length, region, out var touchedPages))
+                if (region.IsReservedOnly)
+                {
+                    if (!EnsureRangeCommitted((ulong)srcPtr, (ulong)destination.Length, region))
                     {
                         return false;
                     }
+                }
 
-                    try
+                if (!CanReadWithoutProtectionChange((ulong)srcPtr, (ulong)destination.Length, region))
+                {
+                    requiresExclusiveAccess = true;
+                }
+                else
+                {
+                    fixed (byte* destPtr = destination)
                     {
-                        fixed (byte* destPtr = destination)
-                        {
-                            Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
-                        }
-                    }
-                    finally
-                    {
-                        RestorePageProtections(touchedPages);
+                        Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
                     }
 
                     return true;
                 }
             }
+        }
+        finally
+        {
+            _gate.ExitReadLock();
+        }
+
+        if (!requiresExclusiveAccess)
+        {
             return false;
         }
+
+        _gate.EnterWriteLock();
+        try
+        {
+            return TryReadExclusive(virtualAddress, destination);
+        }
+        finally
+        {
+            _gate.ExitWriteLock();
+        }
     }
 
     public bool TryWrite(ulong virtualAddress, ReadOnlySpan<byte> source)
     {
-        lock (_gate)
+        var requiresExclusiveAccess = false;
+        _gate.EnterReadLock();
+        try
         {
-            foreach (var region in _regions)
+            var region = FindRegion(virtualAddress, (ulong)source.Length);
+            if (region is not null &&
+                TryResolveRegionOffset(
+                    virtualAddress,
+                    (ulong)source.Length,
+                    region,
+                    out var offset))
             {
-                if (TryResolveRegionOffset(virtualAddress, (ulong)source.Length, region, out var offset))
+                var destPtr = (void*)(region.VirtualAddress + offset);
+                if (source.IsEmpty)
                 {
-                    var destPtr = (void*)(region.VirtualAddress + offset);
-                    if (source.IsEmpty)
-                    {
-                        return true;
-                    }
+                    return true;
+                }
 
-                    if (!VirtualProtect(destPtr, (nuint)source.Length, PAGE_EXECUTE_READWRITE, out var oldProtect))
+                if (region.IsReservedOnly)
+                {
+                    if (!EnsureRangeCommitted((ulong)destPtr, (ulong)source.Length, region))
                     {
                         return false;
                     }
+                }
 
-                    try
+                if (!CanWriteWithoutProtectionChange((ulong)destPtr, (ulong)source.Length, region))
+                {
+                    requiresExclusiveAccess = true;
+                }
+                else
+                {
+                    fixed (byte* srcPtr = source)
                     {
-                        fixed (byte* srcPtr = source)
-                        {
-                            Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
-                        }
-                    }
-                    finally
-                    {
-                        VirtualProtect(destPtr, (nuint)source.Length, oldProtect, out _);
-                        if (IsExecutableProtection(oldProtect))
-                        {
-                            FlushInstructionCache(null, destPtr, (nuint)source.Length);
-                        }
+                        Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
                     }
 
                     return true;
                 }
             }
+        }
+        finally
+        {
+            _gate.ExitReadLock();
+        }
+
+        if (!requiresExclusiveAccess)
+        {
             return false;
         }
+
+        _gate.EnterWriteLock();
+        try
+        {
+            return TryWriteExclusive(virtualAddress, source);
+        }
+        finally
+        {
+            _gate.ExitWriteLock();
+        }
+    }
+
+    private bool TryReadExclusive(ulong virtualAddress, Span<byte> destination)
+    {
+        var region = FindRegion(virtualAddress, (ulong)destination.Length);
+        if (region is not null &&
+            TryResolveRegionOffset(
+                virtualAddress,
+                (ulong)destination.Length,
+                region,
+                out var offset))
+        {
+            var srcPtr = (void*)(region.VirtualAddress + offset);
+            if (!EnsureRangeCommitted((ulong)srcPtr, (ulong)destination.Length, region))
+            {
+                return false;
+            }
+
+            if (CanReadWithoutProtectionChange((ulong)srcPtr, (ulong)destination.Length, region))
+            {
+                fixed (byte* destPtr = destination)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
+                }
+
+                return true;
+            }
+
+            if (!TryTemporarilyProtectForRead((ulong)srcPtr, (ulong)destination.Length, region, out var touchedPages))
+            {
+                return false;
+            }
+
+            try
+            {
+                fixed (byte* destPtr = destination)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
+                }
+            }
+            finally
+            {
+                RestorePageProtections(touchedPages);
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    private bool TryWriteExclusive(ulong virtualAddress, ReadOnlySpan<byte> source)
+    {
+        var region = FindRegion(virtualAddress, (ulong)source.Length);
+        if (region is not null &&
+            TryResolveRegionOffset(
+                virtualAddress,
+                (ulong)source.Length,
+                region,
+                out var offset))
+        {
+            var destPtr = (void*)(region.VirtualAddress + offset);
+            if (!EnsureRangeCommitted((ulong)destPtr, (ulong)source.Length, region))
+            {
+                return false;
+            }
+
+            if (CanWriteWithoutProtectionChange((ulong)destPtr, (ulong)source.Length, region))
+            {
+                fixed (byte* srcPtr = source)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
+                }
+
+                return true;
+            }
+
+            if (!VirtualProtect(destPtr, (nuint)source.Length, PAGE_EXECUTE_READWRITE, out var oldProtect))
+            {
+                return false;
+            }
+
+            try
+            {
+                fixed (byte* srcPtr = source)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
+                }
+            }
+            finally
+            {
+                VirtualProtect(destPtr, (nuint)source.Length, oldProtect, out _);
+                if (IsExecutableProtection(oldProtect))
+                {
+                    FlushInstructionCache(null, destPtr, (nuint)source.Length);
+                }
+            }
+
+            return true;
+        }
+
+        return false;
     }
 
     public bool TryWriteUInt64(ulong virtualAddress, ulong value)
@@ -426,45 +718,146 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
 
     public void* GetPointer(ulong virtualAddress)
     {
-        lock (_gate)
+        _gate.EnterReadLock();
+        try
         {
-            foreach (var region in _regions)
-            {
-                if (virtualAddress >= region.VirtualAddress &&
-                    virtualAddress < region.VirtualAddress + region.Size)
-                {
-                    return (void*)virtualAddress;
-                }
-            }
-            return null;
+            return FindRegion(virtualAddress, 1) is not null
+                ? (void*)virtualAddress
+                : null;
+        }
+        finally
+        {
+            _gate.ExitReadLock();
         }
     }
 
     public bool IsAccessible(ulong virtualAddress, ulong size)
     {
-        lock (_gate)
+        _gate.EnterReadLock();
+        try
         {
-            foreach (var region in _regions)
-            {
-                if (TryResolveRegionOffset(virtualAddress, size, region, out _))
-                {
-                    return true;
-                }
-            }
-            return false;
+            return FindRegion(virtualAddress, size) is not null;
+        }
+        finally
+        {
+            _gate.ExitReadLock();
         }
     }
 
     private MemoryRegion? FindRegion(ulong address, ulong size)
     {
-        foreach (var region in _regions)
+        var low = 0;
+        var high = _regions.Count - 1;
+        MemoryRegion? candidate = null;
+        while (low <= high)
         {
-            if (TryResolveRegionOffset(address, size, region, out _))
+            var middle = low + ((high - low) >> 1);
+            var region = _regions[middle];
+            if (region.VirtualAddress <= address)
             {
-                return region;
+                candidate = region;
+                low = middle + 1;
+            }
+            else
+            {
+                high = middle - 1;
             }
         }
-        return null;
+
+        return candidate is not null &&
+            TryResolveRegionOffset(address, size, candidate, out _)
+                ? candidate
+                : null;
+    }
+
+    private void InsertRegionSorted(MemoryRegion region)
+    {
+        var low = 0;
+        var high = _regions.Count;
+        while (low < high)
+        {
+            var middle = low + ((high - low) >> 1);
+            if (_regions[middle].VirtualAddress < region.VirtualAddress)
+            {
+                low = middle + 1;
+            }
+            else
+            {
+                high = middle;
+            }
+        }
+
+        _regions.Insert(low, region);
+    }
+
+    private bool TryGetOverlappingRegionEnd(ulong address, ulong size, out ulong overlapEnd)
+    {
+        overlapEnd = 0;
+        if (size == 0 || ulong.MaxValue - address < size - 1)
+        {
+            return false;
+        }
+
+        var end = address + size;
+        _gate.EnterReadLock();
+        try
+        {
+            foreach (var region in _regions)
+            {
+                var regionEnd = region.VirtualAddress + region.Size;
+                if (region.VirtualAddress >= end)
+                {
+                    break;
+                }
+
+                if (regionEnd <= address)
+                {
+                    continue;
+                }
+
+                if (address < regionEnd && region.VirtualAddress < end)
+                {
+                    overlapEnd = Math.Max(overlapEnd, regionEnd);
+                }
+            }
+        }
+        finally
+        {
+            _gate.ExitReadLock();
+        }
+
+        return overlapEnd != 0;
+    }
+
+    private ulong GetAllocationSearchCursor(
+        ulong desiredAddress,
+        ulong requestedCursor,
+        ulong alignment,
+        bool executable)
+    {
+        lock (_allocationSearchHintGate)
+        {
+            var key = (desiredAddress, alignment, executable);
+            if (_allocationSearchHints.TryGetValue(key, out var hintedCursor) &&
+                hintedCursor > requestedCursor)
+            {
+                return AlignUp(hintedCursor, alignment);
+            }
+        }
+
+        return requestedCursor;
+    }
+
+    private void UpdateAllocationSearchCursor(
+        ulong desiredAddress,
+        ulong alignment,
+        bool executable,
+        ulong nextCursor)
+    {
+        lock (_allocationSearchHintGate)
+        {
+            _allocationSearchHints[(desiredAddress, alignment, executable)] = AlignUp(nextCursor, alignment);
+        }
     }
 
     private static bool TryResolveRegionOffset(ulong address, ulong size, MemoryRegion region, out ulong offset)
@@ -494,6 +887,100 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
         return protection is PAGE_EXECUTE or PAGE_EXECUTE_READ or PAGE_EXECUTE_READWRITE or PAGE_EXECUTE_WRITECOPY;
     }
 
+    private bool CanReadWithoutProtectionChange(ulong address, ulong size, MemoryRegion region) =>
+        CanAccessWithoutProtectionChange(address, size, region, write: false);
+
+    private bool CanWriteWithoutProtectionChange(ulong address, ulong size, MemoryRegion region) =>
+        CanAccessWithoutProtectionChange(address, size, region, write: true);
+
+    private bool CanAccessWithoutProtectionChange(ulong address, ulong size, MemoryRegion region, bool write)
+    {
+        var startPage = AlignDown(address, PageSize);
+        var endPage = AlignUp(address + size, PageSize);
+        for (var pageAddress = startPage; pageAddress < endPage; pageAddress += PageSize)
+        {
+            if (_pageProtections.TryGetValue(pageAddress, out var flags))
+            {
+                if (write ? (flags & ProgramHeaderFlags.Write) == 0 : (flags & ProgramHeaderFlags.Read) == 0)
+                {
+                    return false;
+                }
+            }
+            else if (write ? !IsWritableProtection(region.Protection) : !IsReadableProtection(region.Protection))
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private static bool IsReadableProtection(uint protection)
+    {
+        return protection is PAGE_READONLY or PAGE_READWRITE or PAGE_EXECUTE_READ or PAGE_EXECUTE_READWRITE;
+    }
+
+    private static bool IsWritableProtection(uint protection)
+    {
+        return protection is PAGE_READWRITE or PAGE_EXECUTE_READWRITE;
+    }
+
+    private static uint GetCommitProtection(MemoryRegion region)
+    {
+        return region.IsExecutable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
+    }
+
+    private static unsafe bool EnsureRangeCommitted(ulong address, ulong size, MemoryRegion region)
+    {
+        if (size == 0 || !region.IsReservedOnly)
+        {
+            return true;
+        }
+
+        var startPage = AlignDown(address, PageSize);
+        var endPage = AlignUp(address + size, PageSize);
+        var commitProtection = GetCommitProtection(region);
+
+        var pageAddress = startPage;
+        while (pageAddress < endPage)
+        {
+            if (VirtualQuery((void*)pageAddress, out var info, (nuint)sizeof(MemoryBasicInformation64)) == 0)
+            {
+                return false;
+            }
+
+            var queriedEnd = info.RegionSize > ulong.MaxValue - info.BaseAddress
+                ? ulong.MaxValue
+                : info.BaseAddress + info.RegionSize;
+            var rangeEnd = Math.Min(endPage, queriedEnd);
+            if (rangeEnd <= pageAddress)
+            {
+                return false;
+            }
+
+            if (info.State == MEM_COMMIT)
+            {
+                pageAddress = rangeEnd;
+                continue;
+            }
+
+            if (info.State != MEM_RESERVE)
+            {
+                return false;
+            }
+
+            var commitSize = rangeEnd - pageAddress;
+            if (VirtualAlloc((void*)pageAddress, (nuint)commitSize, MEM_COMMIT, commitProtection) == null)
+            {
+                return false;
+            }
+
+            pageAddress = rangeEnd;
+        }
+
+        return true;
+    }
+
     private bool TryTemporarilyProtectForRead(
         ulong address,
         ulong size,
@@ -541,6 +1028,29 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
         return checked((value + mask) & ~mask);
     }
 
+    private static ulong ResolveLazyReservePrimeBytes()
+    {
+        var configured = Environment.GetEnvironmentVariable("SHARPEMU_LAZY_RESERVE_PRIME_MB");
+        if (ulong.TryParse(configured, out var megabytes))
+        {
+            return megabytes == 0
+                ? 0
+                : checked(Math.Min(megabytes, 4096UL) * 1024UL * 1024UL);
+        }
+
+        return DefaultLazyReservePrimeBytes;
+    }
+
+    private static void TraceVmem(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_VMEM"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[VMEM] {message}");
+    }
+
     public void Dispose()
     {
         if (!_disposed)
@@ -558,4 +1068,17 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
         public bool IsReservedOnly { get; set; }
         public uint Protection { get; set; }
     }
+
+    private struct MemoryBasicInformation64
+    {
+        public ulong BaseAddress;
+        public ulong AllocationBase;
+        public uint AllocationProtect;
+        public uint Alignment1;
+        public ulong RegionSize;
+        public uint State;
+        public uint Protect;
+        public uint Type;
+        public uint Alignment2;
+    }
 }

src/SharpEmu.Core/Runtime/SharpEmuRuntime.cs

@@ -10,6 +10,7 @@ using SharpEmu.HLE;
 using SharpEmu.Libs.VideoOut;
 using SharpEmu.Libs.Kernel;
 using SharpEmu.Libs.AppContent;
+using SharpEmu.Libs.SaveData;
 using System.Buffers.Binary;
 using System.Collections.Generic;
 using System.Linq;
@@ -125,6 +126,8 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
 
     public OrbisGen2Result Run(string ebootPath)
     {
+        var normalizedEbootPath = Path.GetFullPath(ebootPath);
+        using var app0Binding = BindApp0Root(normalizedEbootPath);
         Console.Error.WriteLine($"[RUNTIME] Loading: {ebootPath}");
         LastExecutionDiagnostics = null;
         LastExecutionTrace = null;
@@ -132,8 +135,9 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         LastBasicBlockTrace = null;
         LastMilestoneLog = null;
         KernelModuleRegistry.Reset();
-        var image = LoadImage(ebootPath);
-        var normalizedEbootPath = Path.GetFullPath(ebootPath);
+        var image = LoadImage(normalizedEbootPath);
+        VideoOutExports.ConfigureApplicationInfo(image.Title, image.TitleId, image.Version);
+        SaveDataExports.ConfigureApplicationInfo(image.TitleId);
         RegisterLoadedModule(normalizedEbootPath, image, isMain: true, isSystemModule: false);
         KernelRuntimeCompatExports.ConfigureProcessProcParamAddress(image.ProcParamAddress);
         Console.Error.WriteLine($"[RUNTIME] Entry: 0x{image.EntryPoint:X16}");
@@ -350,6 +354,41 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         return result;
     }
 
+    private static App0BindingScope? BindApp0Root(string normalizedEbootPath)
+    {
+        const string app0VariableName = "SHARPEMU_APP0_DIR";
+        if (!string.IsNullOrWhiteSpace(Environment.GetEnvironmentVariable(app0VariableName)))
+        {
+            return null;
+        }
+
+        var app0Root = Path.GetDirectoryName(normalizedEbootPath);
+        if (string.IsNullOrWhiteSpace(app0Root))
+        {
+            return null;
+        }
+
+        Environment.SetEnvironmentVariable(app0VariableName, app0Root);
+        return new App0BindingScope(app0VariableName);
+    }
+
+    private sealed class App0BindingScope(string variableName) : IDisposable
+    {
+        private readonly string _variableName = variableName;
+        private bool _disposed;
+
+        public void Dispose()
+        {
+            if (_disposed)
+            {
+                return;
+            }
+
+            Environment.SetEnvironmentVariable(_variableName, null);
+            _disposed = true;
+        }
+    }
+
     private OrbisGen2Result? RunAllInitializers(
         SelfImage mainImage,
         IReadOnlyList<LoadedModuleImage> loadedModuleImages,
@@ -504,6 +543,7 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         {
             Path.Combine(ebootDirectory, "sce_module"),
             Path.Combine(ebootDirectory, "sce_modules"),
+            Path.Combine(ebootDirectory, "Media", "Modules"),
         }
         .Distinct(StringComparer.OrdinalIgnoreCase)
         .Where(Directory.Exists)
@@ -515,7 +555,9 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         }
 
         var allModulePaths = moduleDirectories
-            .SelectMany(Directory.EnumerateFiles)
+            .SelectMany(directory => Directory
+                .EnumerateFiles(directory)
+                .OrderBy(path => path, StringComparer.OrdinalIgnoreCase))
             .Where(path =>
             {
                 var extension = Path.GetExtension(path);
@@ -523,7 +565,6 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
                        string.Equals(extension, ".sprx", StringComparison.OrdinalIgnoreCase);
             })
             .Distinct(StringComparer.OrdinalIgnoreCase)
-            .OrderBy(path => path, StringComparer.OrdinalIgnoreCase)
             .ToArray();
 
         var modulePaths = allModulePaths

src/SharpEmu.Core/SharpEmu.Core.csproj

@@ -1,4 +1,4 @@
-<!--
+<!--
 Copyright (C) 2026 SharpEmu Emulator Project
 SPDX-License-Identifier: GPL-2.0-or-later
 -->
@@ -14,6 +14,10 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <PackageReference Include="Iced" />
   </ItemGroup>
 
+  <PropertyGroup>
+    <NoWarn>$(NoWarn);1591</NoWarn>
+  </PropertyGroup>
+
   <PropertyGroup>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>

src/SharpEmu.Core/packages.lock.json

@@ -8,17 +8,116 @@
         "resolved": "1.21.0",
         "contentHash": "dv5+81Q1TBQvVMSOOOmRcjJmvWcX3BZPZsIq31+RLc5cNft0IHAyNlkdb7ZarOWG913PyBoFDsDXoCIlKmLclg=="
       },
+      "Microsoft.DotNet.PlatformAbstractions": {
+        "type": "Transitive",
+        "resolved": "3.1.6",
+        "contentHash": "jek4XYaQ/PGUwDKKhwR8K47Uh1189PFzMeLqO83mXrXQVIpARZCcfuDedH50YDTepBkfijCZN5U/vZi++erxtg=="
+      },
+      "Microsoft.Extensions.DependencyModel": {
+        "type": "Transitive",
+        "resolved": "9.0.9",
+        "contentHash": "fNGvKct2De8ghm0Bpfq0iWthtzIWabgOTi+gJhNOPhNJIowXNEUE2eZNW/zNCzrHVA3PXg2yZ+3cWZndC2IqYA=="
+      },
+      "Silk.NET.Core": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "D7AT/nnwlB+4RZ84XY8QNGBZMJI5z9l4CSSETIJ1wCfRJzRt/341y3MRZ4HbnFz4r/IGaWOEZr86iE+0/65yyQ==",
+        "dependencies": {
+          "Microsoft.DotNet.PlatformAbstractions": "3.1.6",
+          "Microsoft.Extensions.DependencyModel": "9.0.9"
+        }
+      },
+      "Silk.NET.GLFW": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "UIs4sH57xlPUNHQ/1bt9rymPWlGy8IMDCNv86h0iM4TOA1CkIx0XM/n/tA4AReh1zQkNrvkxPEdZ3Blvy1dyXg==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Ultz.Native.GLFW": "3.4.0"
+        }
+      },
+      "Silk.NET.Maths": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "r8PdIVzME8EH0qAgbmRPO87I4GfgR2j8TofT7EMuRJDf1QluoQwnVypDoFJjQ2ZBSRsGYk5unYxxogI05Ogsmw=="
+      },
+      "Silk.NET.Windowing.Common": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "ThStSinmY9KQI8DGiF5XEhkLJVnBcgRTBTzL9ijg1wMZAYuckz7ykrNw04fjRm2Gryh6tCNGbvz2XaY0efeFzg==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Silk.NET.Maths": "2.23.0"
+        }
+      },
+      "Silk.NET.Windowing.Glfw": {
+        "type": "Transitive",
+        "resolved": "2.23.0",
+        "contentHash": "aYBudKmENmvLRn9p15HbdvlQTnnXskcDfTfbYwSb/4fr263rGLwYuDw/txUEc2jihHJiWCp5+75Y7z5wTJWl7g==",
+        "dependencies": {
+          "Silk.NET.GLFW": "2.23.0",
+          "Silk.NET.Windowing.Common": "2.23.0"
+        }
+      },
+      "Ultz.Native.GLFW": {
+        "type": "Transitive",
+        "resolved": "3.4.0",
+        "contentHash": "Iy22JopynbOJ32vA0lBhFEzGi65GQJBuJHYBYRBpydrDpNoTiHnjIXfA65Gu+8qsOr/ZEoIF8r9aHCgAXuO6DA=="
+      },
       "sharpemu.hle": {
         "type": "Project"
       },
       "sharpemu.libs": {
         "type": "Project",
         "dependencies": {
-          "SharpEmu.HLE": "[1.0.0, )"
+          "SharpEmu.HLE": "[1.0.0, )",
+          "Silk.NET.Vulkan": "[2.23.0, )",
+          "Silk.NET.Vulkan.Extensions.EXT": "[2.23.0, )",
+          "Silk.NET.Vulkan.Extensions.KHR": "[2.23.0, )",
+          "Silk.NET.Windowing": "[2.23.0, )"
         }
       },
       "sharpemu.logging": {
         "type": "Project"
+      },
+      "Silk.NET.Vulkan": {
+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "3/irtlSWXZ3eTi8N6nelI6L34NTB8ZJHpqVMNzZx2aX7Ek9YEQ34NoQW8/Tljrtmkg8KRhHW8hKTEzZaKV8PgA==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0"
+        }
+      },
+      "Silk.NET.Vulkan.Extensions.EXT": {
+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "+Oth189ksRiL6HvGCwIdnsYHawqrbO8y49u1H61z3wsfcHhQZeVDYe/wF5LD7fk3NcdgDvwFD3mLm1QWhdZySw==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Silk.NET.Vulkan": "2.23.0"
+        }
+      },
+      "Silk.NET.Vulkan.Extensions.KHR": {
+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "uRaf4j+SmH3DumjSSSUbFg33BnsGZUyXGj93O9NgGKZSJN3OTmNmQDxRew+/KiVLcgH6qzbto8aNGZ++j9GFWg==",
+        "dependencies": {
+          "Silk.NET.Core": "2.23.0",
+          "Silk.NET.Vulkan": "2.23.0"
+        }
+      },
+      "Silk.NET.Windowing": {
+        "type": "CentralTransitive",
+        "requested": "[2.23.0, )",
+        "resolved": "2.23.0",
+        "contentHash": "OPNPmt/lRyUKVYrFLQXVxyATqD3MKLc1iY1oKx1/2GppgmZxVZPwN12tekrQ4C7408kgB1L5JD1Wnirqqeb2kg==",
+        "dependencies": {
+          "Silk.NET.Windowing.Common": "2.23.0",
+          "Silk.NET.Windowing.Glfw": "2.23.0"
+        }
       }
     }
   }

src/SharpEmu.GUI/App.axaml

@@ -0,0 +1,118 @@
+<!--
+Copyright (C) 2026 SharpEmu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="SharpEmu.GUI.App"
+             RequestedThemeVariant="Dark">
+
+  <Application.Resources>
+    <Color x:Key="SystemAccentColor">#7C5CFC</Color>
+
+    <SolidColorBrush x:Key="BgBrush" Color="#0D1017" />
+    <SolidColorBrush x:Key="ChromeBrush" Color="#090C12" />
+    <SolidColorBrush x:Key="CardBrush" Color="#141924" />
+    <SolidColorBrush x:Key="CardBorderBrush" Color="#232B3A" />
+    <SolidColorBrush x:Key="ElevatedBrush" Color="#1B2230" />
+    <SolidColorBrush x:Key="TextBrush" Color="#E8ECF4" />
+    <SolidColorBrush x:Key="MutedBrush" Color="#8B94A7" />
+    <SolidColorBrush x:Key="FaintBrush" Color="#5A6478" />
+    <SolidColorBrush x:Key="AccentBrush" Color="#7C5CFC" />
+    <SolidColorBrush x:Key="AccentHoverBrush" Color="#8F73FF" />
+    <SolidColorBrush x:Key="DangerBrush" Color="#E5484D" />
+    <SolidColorBrush x:Key="DangerHoverBrush" Color="#F2555A" />
+    <SolidColorBrush x:Key="SuccessBrush" Color="#46C46B" />
+  </Application.Resources>
+
+  <Application.Styles>
+    <FluentTheme />
+
+    <Style Selector="Window">
+      <Setter Property="FontFamily" Value="Inter, Segoe UI, sans-serif" />
+      <Setter Property="Foreground" Value="{StaticResource TextBrush}" />
+    </Style>
+
+    <Style Selector="Border.card">
+      <Setter Property="Background" Value="{StaticResource CardBrush}" />
+      <Setter Property="BorderBrush" Value="{StaticResource CardBorderBrush}" />
+      <Setter Property="BorderThickness" Value="1" />
+      <Setter Property="CornerRadius" Value="10" />
+      <Setter Property="Padding" Value="16" />
+    </Style>
+
+    <Style Selector="Border.pill">
+      <Setter Property="Background" Value="{StaticResource ElevatedBrush}" />
+      <Setter Property="CornerRadius" Value="999" />
+      <Setter Property="Padding" Value="10,3" />
+    </Style>
+
+    <Style Selector="TextBlock.sectionTitle">
+      <Setter Property="FontSize" Value="11" />
+      <Setter Property="FontWeight" Value="SemiBold" />
+      <Setter Property="LetterSpacing" Value="1.5" />
+      <Setter Property="Foreground" Value="{StaticResource MutedBrush}" />
+    </Style>
+
+    <Style Selector="TextBlock.fieldLabel">
+      <Setter Property="FontSize" Value="12" />
+      <Setter Property="Foreground" Value="{StaticResource MutedBrush}" />
+      <Setter Property="Margin" Value="0,0,0,6" />
+    </Style>
+
+    <Style Selector="Button.accent">
+      <Setter Property="Background" Value="{StaticResource AccentBrush}" />
+      <Setter Property="Foreground" Value="White" />
+      <Setter Property="FontWeight" Value="SemiBold" />
+      <Setter Property="Padding" Value="22,10" />
+      <Setter Property="CornerRadius" Value="8" />
+    </Style>
+    <Style Selector="Button.accent:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource AccentHoverBrush}" />
+      <Setter Property="Foreground" Value="White" />
+    </Style>
+
+    <Style Selector="Button.danger">
+      <Setter Property="Background" Value="{StaticResource DangerBrush}" />
+      <Setter Property="Foreground" Value="White" />
+      <Setter Property="FontWeight" Value="SemiBold" />
+      <Setter Property="Padding" Value="22,10" />
+      <Setter Property="CornerRadius" Value="8" />
+    </Style>
+    <Style Selector="Button.danger:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource DangerHoverBrush}" />
+      <Setter Property="Foreground" Value="White" />
+    </Style>
+
+    <Style Selector="Button.ghost">
+      <Setter Property="Background" Value="Transparent" />
+      <Setter Property="BorderBrush" Value="{StaticResource CardBorderBrush}" />
+      <Setter Property="BorderThickness" Value="1" />
+      <Setter Property="Foreground" Value="{StaticResource TextBrush}" />
+      <Setter Property="Padding" Value="12,7" />
+      <Setter Property="CornerRadius" Value="8" />
+    </Style>
+    <Style Selector="Button.ghost:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource ElevatedBrush}" />
+      <Setter Property="Foreground" Value="{StaticResource TextBrush}" />
+    </Style>
+
+    <Style Selector="ListBox.console">
+      <Setter Property="Background" Value="#0B0E14" />
+      <Setter Property="FontFamily" Value="Cascadia Mono, Consolas, Courier New, monospace" />
+      <Setter Property="FontSize" Value="12" />
+    </Style>
+    <Style Selector="ListBox.console ListBoxItem">
+      <Setter Property="Padding" Value="10,1" />
+      <Setter Property="MinHeight" Value="0" />
+    </Style>
+
+    <Style Selector="ListBox.library ListBoxItem">
+      <Setter Property="CornerRadius" Value="8" />
+      <Setter Property="Margin" Value="4,2" />
+      <Setter Property="Padding" Value="8,4" />
+    </Style>
+  </Application.Styles>
+
+</Application>

src/SharpEmu.GUI/App.axaml.cs

@@ -0,0 +1,26 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace SharpEmu.GUI;
+
+public partial class App : Application
+{
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.MainWindow = new MainWindow();
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}

src/SharpEmu.GUI/EmulatorProcess.cs

@@ -0,0 +1,645 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Text;
+using Microsoft.Win32.SafeHandles;
+
+namespace SharpEmu.GUI;
+
+/// <summary>
+/// Launches the SharpEmu CLI as a child process with the same CET/CFG mitigation
+/// opt-outs the CLI would apply to its own relaunched child, while capturing
+/// stdout/stderr through pipes. The CLI's internal relaunch is suppressed via
+/// SHARPEMU_DISABLE_MITIGATION_RELAUNCH so output is not lost to a detached
+/// console. A kill-on-close job object ties the emulator's lifetime to the GUI.
+/// </summary>
+internal sealed class EmulatorProcess : IDisposable
+{
+    private const uint EXTENDED_STARTUPINFO_PRESENT = 0x00080000;
+    private const uint CREATE_NO_WINDOW = 0x08000000;
+    private const int STARTF_USESTDHANDLES = 0x00000100;
+    private const uint HANDLE_FLAG_INHERIT = 0x00000001;
+    private const uint INFINITE = 0xFFFFFFFF;
+    private const int PROC_THREAD_ATTRIBUTE_MITIGATION_POLICY = 0x00020007;
+    private const uint JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE = 0x00002000;
+    private const int JobObjectExtendedLimitInformation = 9;
+    private const ulong PROCESS_CREATION_MITIGATION_POLICY_CONTROL_FLOW_GUARD_ALWAYS_OFF = 0x00000002UL << 40;
+    private const ulong PROCESS_CREATION_MITIGATION_POLICY2_CET_USER_SHADOW_STACKS_ALWAYS_OFF = 0x00000002UL << 28;
+    private const ulong PROCESS_CREATION_MITIGATION_POLICY2_USER_CET_SET_CONTEXT_IP_VALIDATION_ALWAYS_OFF = 0x00000002UL << 32;
+    private const ulong PROCESS_CREATION_MITIGATION_POLICY2_XTENDED_CONTROL_FLOW_GUARD_ALWAYS_OFF = 0x00000002UL << 40;
+
+    private readonly object _sync = new();
+    private nint _processHandle;
+    private nint _jobHandle;
+    private Process? _fallbackProcess;
+    private bool _running;
+    private bool _disposed;
+
+    public event Action<string, bool>? OutputReceived;
+
+    public event Action<int>? Exited;
+
+    public bool IsRunning
+    {
+        get
+        {
+            lock (_sync)
+            {
+                return _running;
+            }
+        }
+    }
+
+    public void Start(string exePath, IReadOnlyList<string> arguments, string? workingDirectory)
+    {
+        lock (_sync)
+        {
+            ObjectDisposedException.ThrowIf(_disposed, this);
+            if (_running)
+            {
+                throw new InvalidOperationException("The emulator process is already running.");
+            }
+
+            if (OperatingSystem.IsWindows())
+            {
+                StartWindows(exePath, arguments, workingDirectory);
+            }
+            else
+            {
+                StartFallback(exePath, arguments, workingDirectory);
+            }
+
+            _running = true;
+        }
+    }
+
+    public void Stop()
+    {
+        lock (_sync)
+        {
+            if (!_running)
+            {
+                return;
+            }
+
+            if (_processHandle != 0)
+            {
+                _ = TerminateProcess(_processHandle, 1);
+            }
+
+            try
+            {
+                _fallbackProcess?.Kill(entireProcessTree: true);
+            }
+            catch (InvalidOperationException)
+            {
+                // Already exited.
+            }
+        }
+    }
+
+    public void Dispose()
+    {
+        lock (_sync)
+        {
+            if (_disposed)
+            {
+                return;
+            }
+
+            _disposed = true;
+        }
+
+        Stop();
+    }
+
+    private void StartWindows(string exePath, IReadOnlyList<string> arguments, string? workingDirectory)
+    {
+        // The CLI would otherwise relaunch itself into a mitigated child whose
+        // console output cannot flow through our pipes.
+        Environment.SetEnvironmentVariable("SHARPEMU_DISABLE_MITIGATION_RELAUNCH", "1");
+
+        var securityAttributes = new SECURITY_ATTRIBUTES
+        {
+            nLength = Marshal.SizeOf<SECURITY_ATTRIBUTES>(),
+            bInheritHandle = 1,
+        };
+
+        if (!CreatePipe(out var stdoutRead, out var stdoutWrite, ref securityAttributes, 0) ||
+            !CreatePipe(out var stderrRead, out var stderrWrite, ref securityAttributes, 0))
+        {
+            throw new Win32Exception(Marshal.GetLastWin32Error(), "Failed to create output pipes.");
+        }
+
+        _ = SetHandleInformation(stdoutRead, HANDLE_FLAG_INHERIT, 0);
+        _ = SetHandleInformation(stderrRead, HANDLE_FLAG_INHERIT, 0);
+
+        var startupInfoEx = new STARTUPINFOEX();
+        startupInfoEx.StartupInfo.cb = Marshal.SizeOf<STARTUPINFOEX>();
+        startupInfoEx.StartupInfo.dwFlags = STARTF_USESTDHANDLES;
+        startupInfoEx.StartupInfo.hStdOutput = stdoutWrite;
+        startupInfoEx.StartupInfo.hStdError = stderrWrite;
+
+        nint attributeList = 0;
+        nint mitigationPolicies = 0;
+        try
+        {
+            nuint attributeListSize = 0;
+            _ = InitializeProcThreadAttributeList(0, 1, 0, ref attributeListSize);
+            attributeList = Marshal.AllocHGlobal((nint)attributeListSize);
+            if (!InitializeProcThreadAttributeList(attributeList, 1, 0, ref attributeListSize))
+            {
+                throw new Win32Exception(Marshal.GetLastWin32Error(), "Failed to initialize the process attribute list.");
+            }
+
+            startupInfoEx.lpAttributeList = attributeList;
+
+            var policy1 = PROCESS_CREATION_MITIGATION_POLICY_CONTROL_FLOW_GUARD_ALWAYS_OFF;
+            var policy2 =
+                PROCESS_CREATION_MITIGATION_POLICY2_CET_USER_SHADOW_STACKS_ALWAYS_OFF |
+                PROCESS_CREATION_MITIGATION_POLICY2_USER_CET_SET_CONTEXT_IP_VALIDATION_ALWAYS_OFF |
+                PROCESS_CREATION_MITIGATION_POLICY2_XTENDED_CONTROL_FLOW_GUARD_ALWAYS_OFF;
+
+            mitigationPolicies = Marshal.AllocHGlobal(sizeof(ulong) * 2);
+            Marshal.WriteInt64(mitigationPolicies, unchecked((long)policy1));
+            Marshal.WriteInt64(nint.Add(mitigationPolicies, sizeof(long)), unchecked((long)policy2));
+
+            if (!UpdateProcThreadAttribute(
+                attributeList,
+                0,
+                PROC_THREAD_ATTRIBUTE_MITIGATION_POLICY,
+                mitigationPolicies,
+                (nuint)(sizeof(ulong) * 2),
+                0,
+                0))
+            {
+                throw new Win32Exception(Marshal.GetLastWin32Error(), "Failed to apply the mitigation policy.");
+            }
+
+            var currentDirectory = workingDirectory ?? Environment.CurrentDirectory;
+            var created = CreateProcessW(
+                exePath,
+                new StringBuilder(BuildCommandLine(exePath, arguments)),
+                0,
+                0,
+                true,
+                EXTENDED_STARTUPINFO_PRESENT | CREATE_NO_WINDOW,
+                0,
+                currentDirectory,
+                ref startupInfoEx,
+                out var processInfo);
+
+            if (!created)
+            {
+                // Some mitigation policy bits (e.g. XFG) are not supported on
+                // older Windows builds. Mirror the CLI's behavior and fall back
+                // to launching without the mitigation attribute list.
+                startupInfoEx.lpAttributeList = 0;
+                created = CreateProcessW(
+                    exePath,
+                    new StringBuilder(BuildCommandLine(exePath, arguments)),
+                    0,
+                    0,
+                    true,
+                    CREATE_NO_WINDOW,
+                    0,
+                    currentDirectory,
+                    ref startupInfoEx,
+                    out processInfo);
+            }
+
+            if (!created)
+            {
+                var error = Marshal.GetLastWin32Error();
+                throw new Win32Exception(error, $"Failed to start '{exePath}' (Win32 error {error}: {new Win32Exception(error).Message}).");
+            }
+
+            CloseHandle(processInfo.hThread);
+            _processHandle = processInfo.hProcess;
+
+            _jobHandle = CreateJobObjectW(0, null);
+            if (_jobHandle != 0 &&
+                (!TryEnableKillOnJobClose(_jobHandle) || !AssignProcessToJobObject(_jobHandle, processInfo.hProcess)))
+            {
+                CloseHandle(_jobHandle);
+                _jobHandle = 0;
+            }
+
+            StartReaderThread(stdoutRead, isError: false);
+            StartReaderThread(stderrRead, isError: true);
+            StartExitWatcherThread();
+        }
+        catch
+        {
+            CloseHandle(stdoutRead);
+            CloseHandle(stderrRead);
+            throw;
+        }
+        finally
+        {
+            // The child owns duplicated pipe write ends; closing ours lets the
+            // readers observe EOF when the child exits.
+            CloseHandle(stdoutWrite);
+            CloseHandle(stderrWrite);
+
+            if (attributeList != 0)
+            {
+                DeleteProcThreadAttributeList(attributeList);
+                Marshal.FreeHGlobal(attributeList);
+            }
+
+            if (mitigationPolicies != 0)
+            {
+                Marshal.FreeHGlobal(mitigationPolicies);
+            }
+        }
+    }
+
+    private void StartFallback(string exePath, IReadOnlyList<string> arguments, string? workingDirectory)
+    {
+        var startInfo = new ProcessStartInfo
+        {
+            FileName = exePath,
+            WorkingDirectory = workingDirectory ?? Environment.CurrentDirectory,
+            UseShellExecute = false,
+            CreateNoWindow = true,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+        };
+        foreach (var argument in arguments)
+        {
+            startInfo.ArgumentList.Add(argument);
+        }
+
+        var process = new Process { StartInfo = startInfo, EnableRaisingEvents = true };
+        process.OutputDataReceived += (_, e) =>
+        {
+            if (e.Data is not null)
+            {
+                OutputReceived?.Invoke(e.Data, false);
+            }
+        };
+        process.ErrorDataReceived += (_, e) =>
+        {
+            if (e.Data is not null)
+            {
+                OutputReceived?.Invoke(e.Data, true);
+            }
+        };
+        process.Exited += (_, _) =>
+        {
+            int exitCode;
+            try
+            {
+                exitCode = process.ExitCode;
+            }
+            catch (InvalidOperationException)
+            {
+                exitCode = -1;
+            }
+
+            OnExited(exitCode);
+        };
+
+        process.Start();
+        process.BeginOutputReadLine();
+        process.BeginErrorReadLine();
+        _fallbackProcess = process;
+    }
+
+    private void StartReaderThread(nint readHandle, bool isError)
+    {
+        var thread = new Thread(() =>
+        {
+            using var stream = new FileStream(new SafeFileHandle(readHandle, ownsHandle: true), FileAccess.Read);
+            using var reader = new StreamReader(stream, Encoding.UTF8);
+            try
+            {
+                while (reader.ReadLine() is { } line)
+                {
+                    OutputReceived?.Invoke(line, isError);
+                }
+            }
+            catch (IOException)
+            {
+                // Pipe broken on process teardown.
+            }
+        })
+        {
+            IsBackground = true,
+            Name = isError ? "SharpEmu stderr reader" : "SharpEmu stdout reader",
+        };
+        thread.Start();
+    }
+
+    private void StartExitWatcherThread()
+    {
+        var processHandle = _processHandle;
+        var thread = new Thread(() =>
+        {
+            _ = WaitForSingleObject(processHandle, INFINITE);
+            var exitCode = GetExitCodeProcess(processHandle, out var rawExitCode)
+                ? unchecked((int)rawExitCode)
+                : -1;
+            OnExited(exitCode);
+        })
+        {
+            IsBackground = true,
+            Name = "SharpEmu exit watcher",
+        };
+        thread.Start();
+    }
+
+    private void OnExited(int exitCode)
+    {
+        lock (_sync)
+        {
+            if (!_running)
+            {
+                return;
+            }
+
+            _running = false;
+            if (_processHandle != 0)
+            {
+                CloseHandle(_processHandle);
+                _processHandle = 0;
+            }
+
+            if (_jobHandle != 0)
+            {
+                CloseHandle(_jobHandle);
+                _jobHandle = 0;
+            }
+
+            _fallbackProcess?.Dispose();
+            _fallbackProcess = null;
+        }
+
+        Exited?.Invoke(exitCode);
+    }
+
+    private static bool TryEnableKillOnJobClose(nint jobHandle)
+    {
+        var extendedLimitInfo = new JOBOBJECT_EXTENDED_LIMIT_INFORMATION
+        {
+            BasicLimitInformation = new JOBOBJECT_BASIC_LIMIT_INFORMATION
+            {
+                LimitFlags = JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE,
+            },
+        };
+
+        var size = Marshal.SizeOf<JOBOBJECT_EXTENDED_LIMIT_INFORMATION>();
+        var memory = Marshal.AllocHGlobal(size);
+        try
+        {
+            Marshal.StructureToPtr(extendedLimitInfo, memory, false);
+            return SetInformationJobObject(
+                jobHandle,
+                JobObjectExtendedLimitInformation,
+                memory,
+                unchecked((uint)size));
+        }
+        finally
+        {
+            Marshal.FreeHGlobal(memory);
+        }
+    }
+
+    private static string BuildCommandLine(string processPath, IReadOnlyList<string> args)
+    {
+        var builder = new StringBuilder();
+        builder.Append(QuoteArgument(processPath));
+        for (var i = 0; i < args.Count; i++)
+        {
+            builder.Append(' ');
+            builder.Append(QuoteArgument(args[i]));
+        }
+
+        return builder.ToString();
+    }
+
+    private static string QuoteArgument(string argument)
+    {
+        if (argument.Length == 0)
+        {
+            return "\"\"";
+        }
+
+        var needsQuotes = false;
+        foreach (var c in argument)
+        {
+            if (char.IsWhiteSpace(c) || c == '"')
+            {
+                needsQuotes = true;
+                break;
+            }
+        }
+
+        if (!needsQuotes)
+        {
+            return argument;
+        }
+
+        var builder = new StringBuilder(argument.Length + 2);
+        builder.Append('"');
+
+        var backslashCount = 0;
+        foreach (var c in argument)
+        {
+            if (c == '\\')
+            {
+                backslashCount++;
+                continue;
+            }
+
+            if (c == '"')
+            {
+                builder.Append('\\', (backslashCount * 2) + 1);
+                builder.Append('"');
+                backslashCount = 0;
+                continue;
+            }
+
+            if (backslashCount > 0)
+            {
+                builder.Append('\\', backslashCount);
+                backslashCount = 0;
+            }
+
+            builder.Append(c);
+        }
+
+        if (backslashCount > 0)
+        {
+            builder.Append('\\', backslashCount * 2);
+        }
+
+        builder.Append('"');
+        return builder.ToString();
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct SECURITY_ATTRIBUTES
+    {
+        public int nLength;
+        public nint lpSecurityDescriptor;
+        public int bInheritHandle;
+    }
+
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+    private struct STARTUPINFO
+    {
+        public int cb;
+        public nint lpReserved;
+        public nint lpDesktop;
+        public nint lpTitle;
+        public int dwX;
+        public int dwY;
+        public int dwXSize;
+        public int dwYSize;
+        public int dwXCountChars;
+        public int dwYCountChars;
+        public int dwFillAttribute;
+        public int dwFlags;
+        public short wShowWindow;
+        public short cbReserved2;
+        public nint lpReserved2;
+        public nint hStdInput;
+        public nint hStdOutput;
+        public nint hStdError;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct STARTUPINFOEX
+    {
+        public STARTUPINFO StartupInfo;
+        public nint lpAttributeList;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct PROCESS_INFORMATION
+    {
+        public nint hProcess;
+        public nint hThread;
+        public int dwProcessId;
+        public int dwThreadId;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct JOBOBJECT_BASIC_LIMIT_INFORMATION
+    {
+        public long PerProcessUserTimeLimit;
+        public long PerJobUserTimeLimit;
+        public uint LimitFlags;
+        public nuint MinimumWorkingSetSize;
+        public nuint MaximumWorkingSetSize;
+        public uint ActiveProcessLimit;
+        public nint Affinity;
+        public uint PriorityClass;
+        public uint SchedulingClass;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct IO_COUNTERS
+    {
+        public ulong ReadOperationCount;
+        public ulong WriteOperationCount;
+        public ulong OtherOperationCount;
+        public ulong ReadTransferCount;
+        public ulong WriteTransferCount;
+        public ulong OtherTransferCount;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct JOBOBJECT_EXTENDED_LIMIT_INFORMATION
+    {
+        public JOBOBJECT_BASIC_LIMIT_INFORMATION BasicLimitInformation;
+        public IO_COUNTERS IoInfo;
+        public nuint ProcessMemoryLimit;
+        public nuint JobMemoryLimit;
+        public nuint PeakProcessMemoryUsed;
+        public nuint PeakJobMemoryUsed;
+    }
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool CreatePipe(
+        out nint hReadPipe,
+        out nint hWritePipe,
+        ref SECURITY_ATTRIBUTES lpPipeAttributes,
+        uint nSize);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool SetHandleInformation(nint hObject, uint dwMask, uint dwFlags);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool InitializeProcThreadAttributeList(
+        nint lpAttributeList,
+        int dwAttributeCount,
+        int dwFlags,
+        ref nuint lpSize);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool UpdateProcThreadAttribute(
+        nint lpAttributeList,
+        uint dwFlags,
+        nint attribute,
+        nint lpValue,
+        nuint cbSize,
+        nint lpPreviousValue,
+        nint lpReturnSize);
+
+    [DllImport("kernel32.dll")]
+    private static extern void DeleteProcThreadAttributeList(nint lpAttributeList);
+
+    [DllImport("kernel32.dll", EntryPoint = "CreateJobObjectW", SetLastError = true, CharSet = CharSet.Unicode)]
+    private static extern nint CreateJobObjectW(nint lpJobAttributes, string? lpName);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool SetInformationJobObject(
+        nint hJob,
+        int jobObjectInfoClass,
+        nint lpJobObjectInfo,
+        uint cbJobObjectInfoLength);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool AssignProcessToJobObject(nint hJob, nint hProcess);
+
+    [DllImport("kernel32.dll", EntryPoint = "CreateProcessW", SetLastError = true, CharSet = CharSet.Unicode)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool CreateProcessW(
+        string applicationName,
+        StringBuilder commandLine,
+        nint processAttributes,
+        nint threadAttributes,
+        [MarshalAs(UnmanagedType.Bool)] bool inheritHandles,
+        uint creationFlags,
+        nint environment,
+        string currentDirectory,
+        ref STARTUPINFOEX startupInfo,
+        out PROCESS_INFORMATION processInformation);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    private static extern uint WaitForSingleObject(nint handle, uint milliseconds);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool GetExitCodeProcess(nint process, out uint exitCode);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool TerminateProcess(nint process, uint exitCode);
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool CloseHandle(nint handle);
+}

src/SharpEmu.GUI/GameEntry.cs

@@ -0,0 +1,22 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+namespace SharpEmu.GUI;
+
+public sealed record GameEntry(string Name, string? TitleId, string Path, long SizeBytes)
+{
+    public string Detail => TitleId is not null
+        ? $"{TitleId}  •  {FormatSize(SizeBytes)}"
+        : $"{FormatSize(SizeBytes)}  •  {Path}";
+
+    private static string FormatSize(long bytes)
+    {
+        return bytes switch
+        {
+            >= 1L << 30 => $"{bytes / (double)(1L << 30):0.0} GiB",
+            >= 1L << 20 => $"{bytes / (double)(1L << 20):0.0} MiB",
+            >= 1L << 10 => $"{bytes / (double)(1L << 10):0.0} KiB",
+            _ => $"{bytes} B",
+        };
+    }
+}

src/SharpEmu.GUI/GuiLauncher.cs

@@ -0,0 +1,47 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using Avalonia;
+
+namespace SharpEmu.GUI;
+
+/// <summary>
+/// Entry point for the desktop frontend, hosted by the SharpEmu executable
+/// when it is started without command-line arguments.
+/// </summary>
+public static class GuiLauncher
+{
+    public static int Run()
+    {
+        try
+        {
+            BuildAvaloniaApp().StartWithClassicDesktopLifetime(Array.Empty<string>());
+            return 0;
+        }
+        catch (Exception ex)
+        {
+            WriteCrashLog(ex);
+            throw;
+        }
+    }
+
+    public static AppBuilder BuildAvaloniaApp()
+        => AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+            .WithInterFont()
+            .LogToTrace();
+
+    private static void WriteCrashLog(Exception ex)
+    {
+        try
+        {
+            File.AppendAllText(
+                Path.Combine(AppContext.BaseDirectory, "gui-crash.log"),
+                $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] {ex}{Environment.NewLine}{Environment.NewLine}");
+        }
+        catch (Exception)
+        {
+            // Crash logging is best-effort.
+        }
+    }
+}

src/SharpEmu.GUI/GuiSettings.cs

@@ -0,0 +1,64 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Text.Json;
+
+namespace SharpEmu.GUI;
+
+public sealed class GuiSettings
+{
+    private static readonly JsonSerializerOptions SerializerOptions = new()
+    {
+        WriteIndented = true,
+    };
+
+    public List<string> GameFolders { get; set; } = new();
+
+    public string LogLevel { get; set; } = "Info";
+
+    public int ImportTraceLimit { get; set; }
+
+    public bool StrictDynlibResolution { get; set; }
+
+    public string? EmulatorPath { get; set; }
+
+    // The emulator is portable and keeps its data next to the executable;
+    // the GUI follows the same convention.
+    public static string SettingsPath => Path.Combine(AppContext.BaseDirectory, "gui-settings.json");
+
+    public static GuiSettings Load()
+    {
+        try
+        {
+            if (File.Exists(SettingsPath))
+            {
+                var json = File.ReadAllText(SettingsPath);
+                return JsonSerializer.Deserialize<GuiSettings>(json, SerializerOptions) ?? new GuiSettings();
+            }
+        }
+        catch (Exception)
+        {
+            // Corrupt or unreadable settings fall back to defaults.
+        }
+
+        return new GuiSettings();
+    }
+
+    public void Save()
+    {
+        try
+        {
+            var directory = Path.GetDirectoryName(SettingsPath);
+            if (!string.IsNullOrEmpty(directory))
+            {
+                Directory.CreateDirectory(directory);
+            }
+
+            File.WriteAllText(SettingsPath, JsonSerializer.Serialize(this, SerializerOptions));
+        }
+        catch (Exception)
+        {
+            // Settings persistence is best-effort.
+        }
+    }
+}

src/SharpEmu.GUI/LogLine.cs

@@ -0,0 +1,8 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using Avalonia.Media;
+
+namespace SharpEmu.GUI;
+
+public sealed record LogLine(string Text, IBrush Brush);

src/SharpEmu.GUI/MainWindow.axaml

@@ -0,0 +1,157 @@
+<!--
+Copyright (C) 2026 SharpEmu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        x:Class="SharpEmu.GUI.MainWindow"
+        Title="SharpEmu"
+        Width="1280" Height="800"
+        MinWidth="980" MinHeight="620"
+        WindowStartupLocation="CenterScreen"
+        Background="{StaticResource BgBrush}"
+        ExtendClientAreaToDecorationsHint="True"
+        ExtendClientAreaChromeHints="PreferSystemChrome"
+        ExtendClientAreaTitleBarHeightHint="44"
+        Icon="avares://SharpEmu.GUI/Assets/SharpEmu.ico">
+
+  <Grid RowDefinitions="44,*,32">
+
+    <!-- Title bar -->
+    <Grid x:Name="TitleBar" Grid.Row="0" Background="{StaticResource ChromeBrush}">
+      <StackPanel Orientation="Horizontal" Spacing="10" Margin="16,0" VerticalAlignment="Center">
+        <Image Source="avares://SharpEmu.GUI/Assets/logo.png" Width="20" Height="20" />
+        <TextBlock Text="SharpEmu" FontSize="14" FontWeight="SemiBold" VerticalAlignment="Center" />
+        <Border Classes="pill">
+          <TextBlock x:Name="VersionText" Text="v0.0.1" FontSize="11" Foreground="{StaticResource MutedBrush}" />
+        </Border>
+      </StackPanel>
+    </Grid>
+
+    <!-- Main content -->
+    <Grid Grid.Row="1" Margin="14" ColumnDefinitions="360,14,*">
+
+      <!-- Game library -->
+      <Border Grid.Column="0" Classes="card" Padding="0">
+        <Grid RowDefinitions="Auto,Auto,*,Auto">
+          <Grid Grid.Row="0" ColumnDefinitions="*,Auto" Margin="16,16,16,10">
+            <TextBlock Classes="sectionTitle" Text="GAME LIBRARY" VerticalAlignment="Center" />
+            <Border Grid.Column="1" Classes="pill">
+              <TextBlock x:Name="GameCountText" Text="0" FontSize="11" Foreground="{StaticResource MutedBrush}" />
+            </Border>
+          </Grid>
+
+          <TextBox Grid.Row="1" x:Name="SearchBox" Watermark="Search games…" Margin="12,0,12,8" CornerRadius="8" />
+
+          <ListBox Grid.Row="2" x:Name="GameList" Classes="library" Background="Transparent" Margin="8,0">
+            <ListBox.ItemTemplate>
+              <DataTemplate>
+                <StackPanel Margin="4,4" Spacing="2">
+                  <TextBlock Text="{Binding Name}" FontSize="14" FontWeight="SemiBold" TextTrimming="CharacterEllipsis" />
+                  <TextBlock Text="{Binding Detail}" FontSize="11" Foreground="{StaticResource MutedBrush}" TextTrimming="CharacterEllipsis" />
+                </StackPanel>
+              </DataTemplate>
+            </ListBox.ItemTemplate>
+          </ListBox>
+
+          <StackPanel Grid.Row="3" Orientation="Horizontal" Spacing="8" Margin="16,12,16,16">
+            <Button x:Name="AddFolderButton" Classes="ghost" Content="＋ Add folder" />
+            <Button x:Name="RescanButton" Classes="ghost" Content="⟳ Rescan" />
+            <Button x:Name="OpenFileButton" Classes="ghost" Content="Open file…" />
+          </StackPanel>
+        </Grid>
+      </Border>
+
+      <!-- Right column -->
+      <Grid Grid.Column="2" RowDefinitions="Auto,12,Auto,12,*">
+
+        <!-- Selected game / launch -->
+        <Border Grid.Row="0" Classes="card">
+          <Grid ColumnDefinitions="*,Auto">
+            <StackPanel Grid.Column="0" Spacing="6" VerticalAlignment="Center">
+              <TextBlock x:Name="SelectedGameTitle" Text="No game selected" FontSize="20" FontWeight="Bold" TextTrimming="CharacterEllipsis" />
+              <TextBlock x:Name="SelectedGamePath" Text="Pick a game from the library, or open an eboot.bin directly."
+                         FontSize="12" Foreground="{StaticResource MutedBrush}" TextTrimming="CharacterEllipsis" />
+              <StackPanel Orientation="Horizontal" Spacing="8">
+                <Ellipse x:Name="StatusDot" Width="9" Height="9" Fill="{StaticResource FaintBrush}" VerticalAlignment="Center" />
+                <TextBlock x:Name="StatusText" Text="Idle" FontSize="12" Foreground="{StaticResource MutedBrush}" VerticalAlignment="Center" />
+              </StackPanel>
+            </StackPanel>
+            <StackPanel Grid.Column="1" Orientation="Horizontal" Spacing="10" VerticalAlignment="Center" Margin="16,0,0,0">
+              <Button x:Name="LaunchButton" Classes="accent" Content="▶  Launch" IsEnabled="False" />
+              <Button x:Name="StopButton" Classes="danger" Content="■  Stop" IsEnabled="False" />
+            </StackPanel>
+          </Grid>
+        </Border>
+
+        <!-- Launch options -->
+        <Border Grid.Row="2" Classes="card">
+          <StackPanel Spacing="12">
+            <TextBlock Classes="sectionTitle" Text="LAUNCH OPTIONS" />
+            <WrapPanel>
+              <StackPanel Margin="0,0,24,0">
+                <TextBlock Classes="fieldLabel" Text="CPU engine" />
+                <ComboBox x:Name="CpuEngineBox" Width="150" SelectedIndex="0" CornerRadius="8">
+                  <ComboBoxItem Content="Native" />
+                </ComboBox>
+              </StackPanel>
+              <StackPanel Margin="0,0,24,0">
+                <TextBlock Classes="fieldLabel" Text="Log level" />
+                <ComboBox x:Name="LogLevelBox" Width="150" SelectedIndex="2" CornerRadius="8">
+                  <ComboBoxItem Content="Trace" />
+                  <ComboBoxItem Content="Debug" />
+                  <ComboBoxItem Content="Info" />
+                  <ComboBoxItem Content="Warning" />
+                  <ComboBoxItem Content="Error" />
+                  <ComboBoxItem Content="Critical" />
+                </ComboBox>
+              </StackPanel>
+              <StackPanel Margin="0,0,24,0">
+                <TextBlock Classes="fieldLabel" Text="Import trace limit (0 = off)" />
+                <NumericUpDown x:Name="TraceImportsBox" Width="170" Minimum="0" Maximum="4096" Increment="16"
+                               Value="0" FormatString="0" CornerRadius="8" />
+              </StackPanel>
+              <StackPanel>
+                <TextBlock Classes="fieldLabel" Text="Strict dynlib resolution" />
+                <ToggleSwitch x:Name="StrictToggle" OnContent="On" OffContent="Off" />
+              </StackPanel>
+            </WrapPanel>
+          </StackPanel>
+        </Border>
+
+        <!-- Console -->
+        <Border Grid.Row="4" Classes="card" Padding="0">
+          <Grid RowDefinitions="Auto,*">
+            <Grid Grid.Row="0" ColumnDefinitions="*,Auto,Auto,Auto" Margin="16,14,16,10">
+              <TextBlock Classes="sectionTitle" Text="CONSOLE" VerticalAlignment="Center" />
+              <CheckBox Grid.Column="1" x:Name="AutoScrollCheck" Content="Auto-scroll" IsChecked="True"
+                        FontSize="12" Margin="0,0,12,0" />
+              <Button Grid.Column="2" x:Name="CopyLogButton" Classes="ghost" Content="Copy" FontSize="12"
+                      Padding="10,4" Margin="0,0,8,0" />
+              <Button Grid.Column="3" x:Name="ClearLogButton" Classes="ghost" Content="Clear" FontSize="12"
+                      Padding="10,4" />
+            </Grid>
+            <ListBox Grid.Row="1" x:Name="ConsoleList" Classes="console" BorderThickness="0,1,0,0"
+                     BorderBrush="{StaticResource CardBorderBrush}" CornerRadius="0,0,10,10">
+              <ListBox.ItemTemplate>
+                <DataTemplate>
+                  <TextBlock Text="{Binding Text}" Foreground="{Binding Brush}" TextWrapping="NoWrap" />
+                </DataTemplate>
+              </ListBox.ItemTemplate>
+            </ListBox>
+          </Grid>
+        </Border>
+      </Grid>
+    </Grid>
+
+    <!-- Status bar -->
+    <Grid Grid.Row="2" Background="{StaticResource ChromeBrush}" ColumnDefinitions="*,Auto">
+      <TextBlock x:Name="EmulatorPathText" Grid.Column="0" Text="Emulator: locating…" FontSize="11"
+                 Foreground="{StaticResource FaintBrush}" VerticalAlignment="Center" Margin="16,0"
+                 TextTrimming="CharacterEllipsis" />
+      <TextBlock x:Name="StatusBarRight" Grid.Column="1" Text="" FontSize="11"
+                 Foreground="{StaticResource FaintBrush}" VerticalAlignment="Center" Margin="16,0" />
+    </Grid>
+  </Grid>
+</Window>

src/SharpEmu.GUI/MainWindow.axaml.cs

@@ -0,0 +1,609 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Collections.Concurrent;
+using System.Collections.ObjectModel;
+using System.Reflection;
+using System.Text.Json;
+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.Media;
+using Avalonia.Platform.Storage;
+using Avalonia.Threading;
+
+namespace SharpEmu.GUI;
+
+public partial class MainWindow : Window
+{
+    private const int MaxConsoleLines = 4000;
+
+    private static readonly IBrush DefaultLineBrush = new SolidColorBrush(Color.Parse("#C7CFDE"));
+    private static readonly IBrush DimLineBrush = new SolidColorBrush(Color.Parse("#6B7488"));
+    private static readonly IBrush InfoLineBrush = new SolidColorBrush(Color.Parse("#6FA8FF"));
+    private static readonly IBrush WarningLineBrush = new SolidColorBrush(Color.Parse("#E8B341"));
+    private static readonly IBrush ErrorLineBrush = new SolidColorBrush(Color.Parse("#F2777C"));
+    private static readonly IBrush SuccessLineBrush = new SolidColorBrush(Color.Parse("#63D489"));
+
+    private readonly List<GameEntry> _allGames = new();
+    private readonly ObservableCollection<GameEntry> _visibleGames = new();
+    private readonly ObservableCollection<LogLine> _consoleLines = new();
+    private readonly ConcurrentQueue<(string Line, bool IsError)> _pendingLines = new();
+    private readonly DispatcherTimer _consoleFlushTimer;
+
+    private GuiSettings _settings = new();
+    private EmulatorProcess? _emulator;
+    private string? _emulatorExePath;
+    private bool _isRunning;
+    private int _autoScrollTicks;
+
+    public MainWindow()
+    {
+        InitializeComponent();
+
+        GameList.ItemsSource = _visibleGames;
+        ConsoleList.ItemsSource = _consoleLines;
+
+        _consoleFlushTimer = new DispatcherTimer
+        {
+            Interval = TimeSpan.FromMilliseconds(80),
+        };
+        _consoleFlushTimer.Tick += (_, _) =>
+        {
+            FlushPendingConsoleLines();
+            MaybeAutoScroll();
+        };
+        _consoleFlushTimer.Start();
+
+        TitleBar.PointerPressed += OnTitleBarPointerPressed;
+        GameList.SelectionChanged += (_, _) => UpdateSelectedGame();
+        GameList.DoubleTapped += (_, _) => LaunchSelected();
+        SearchBox.TextChanged += (_, _) => RefreshVisibleGames();
+        AddFolderButton.Click += async (_, _) => await AddFolderAsync();
+        RescanButton.Click += async (_, _) => await RescanLibraryAsync();
+        OpenFileButton.Click += async (_, _) => await OpenFileAsync();
+        LaunchButton.Click += (_, _) => LaunchSelected();
+        StopButton.Click += (_, _) => _emulator?.Stop();
+        ClearLogButton.Click += (_, _) => _consoleLines.Clear();
+        CopyLogButton.Click += async (_, _) => await CopyConsoleAsync();
+
+        Opened += async (_, _) => await OnOpenedAsync();
+        Closing += (_, _) => OnWindowClosing();
+    }
+
+    private async Task OnOpenedAsync()
+    {
+        var version = Assembly.GetExecutingAssembly().GetName().Version;
+        if (version is not null)
+        {
+            VersionText.Text = $"v{version.ToString(3)}";
+        }
+
+        _settings = GuiSettings.Load();
+        ApplySettingsToControls();
+        LocateEmulator();
+        await RescanLibraryAsync();
+    }
+
+    private void OnWindowClosing()
+    {
+        ReadControlsIntoSettings();
+        _settings.Save();
+        _consoleFlushTimer.Stop();
+        _emulator?.Dispose();
+    }
+
+    private void OnTitleBarPointerPressed(object? sender, PointerPressedEventArgs e)
+    {
+        if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
+        {
+            BeginMoveDrag(e);
+        }
+    }
+
+    // ---- Settings <-> controls ----
+
+    private void ApplySettingsToControls()
+    {
+        LogLevelBox.SelectedIndex = _settings.LogLevel.ToLowerInvariant() switch
+        {
+            "trace" => 0,
+            "debug" => 1,
+            "info" => 2,
+            "warning" or "warn" => 3,
+            "error" => 4,
+            "critical" or "fatal" => 5,
+            _ => 2,
+        };
+        TraceImportsBox.Value = Math.Clamp(_settings.ImportTraceLimit, 0, 4096);
+        StrictToggle.IsChecked = _settings.StrictDynlibResolution;
+    }
+
+    private void ReadControlsIntoSettings()
+    {
+        _settings.LogLevel = SelectedLogLevel();
+        _settings.ImportTraceLimit = (int)(TraceImportsBox.Value ?? 0);
+        _settings.StrictDynlibResolution = StrictToggle.IsChecked == true;
+    }
+
+    private string SelectedLogLevel()
+    {
+        return LogLevelBox.SelectedIndex switch
+        {
+            0 => "Trace",
+            1 => "Debug",
+            2 => "Info",
+            3 => "Warning",
+            4 => "Error",
+            5 => "Critical",
+            _ => "Info",
+        };
+    }
+
+    // ---- Emulator discovery ----
+
+    private void LocateEmulator()
+    {
+        var exeName = OperatingSystem.IsWindows() ? "SharpEmu.exe" : "SharpEmu";
+        var baseDirectory = AppContext.BaseDirectory;
+        var candidates = new List<string>();
+        if (!string.IsNullOrWhiteSpace(_settings.EmulatorPath))
+        {
+            candidates.Add(_settings.EmulatorPath);
+        }
+
+        // The GUI and the CLI are the same executable: with arguments it runs
+        // the emulator, so the preferred child process is this process itself.
+        if (Environment.ProcessPath is { } selfPath &&
+            Path.GetFileNameWithoutExtension(selfPath).Equals("SharpEmu", StringComparison.OrdinalIgnoreCase))
+        {
+            candidates.Add(selfPath);
+        }
+
+        candidates.Add(Path.Combine(baseDirectory, exeName));
+        candidates.Add(Path.Combine(baseDirectory, "win-x64", exeName));
+        candidates.Add(Path.Combine(baseDirectory, "..", exeName));
+
+        _emulatorExePath = candidates.FirstOrDefault(File.Exists) is { } found
+            ? Path.GetFullPath(found)
+            : null;
+
+        EmulatorPathText.Text = _emulatorExePath is not null
+            ? $"Emulator: {_emulatorExePath}"
+            : "Emulator: SharpEmu executable not found — build SharpEmu.CLI first.";
+    }
+
+    // ---- Game library ----
+
+    private async Task AddFolderAsync()
+    {
+        var folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions
+        {
+            Title = "Choose a folder containing games",
+            AllowMultiple = false,
+        });
+
+        var path = folders.FirstOrDefault()?.TryGetLocalPath();
+        if (string.IsNullOrEmpty(path))
+        {
+            return;
+        }
+
+        if (!_settings.GameFolders.Contains(path, StringComparer.OrdinalIgnoreCase))
+        {
+            _settings.GameFolders.Add(path);
+            _settings.Save();
+        }
+
+        await RescanLibraryAsync();
+    }
+
+    private async Task RescanLibraryAsync()
+    {
+        var folders = _settings.GameFolders.ToArray();
+        StatusBarRight.Text = "Scanning library…";
+
+        var games = await Task.Run(() => ScanFolders(folders));
+
+        _allGames.Clear();
+        _allGames.AddRange(games);
+        RefreshVisibleGames();
+        StatusBarRight.Text = folders.Length == 0
+            ? "Add a game folder to populate the library."
+            : $"Library scanned: {games.Count} game(s) in {folders.Length} folder(s).";
+    }
+
+    private static List<GameEntry> ScanFolders(IReadOnlyList<string> folders)
+    {
+        var games = new List<GameEntry>();
+        var seen = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        var enumeration = new EnumerationOptions
+        {
+            IgnoreInaccessible = true,
+            RecurseSubdirectories = true,
+            MaxRecursionDepth = 8,
+        };
+
+        foreach (var folder in folders)
+        {
+            if (!Directory.Exists(folder))
+            {
+                continue;
+            }
+
+            try
+            {
+                foreach (var file in Directory.EnumerateFiles(folder, "eboot.bin", enumeration))
+                {
+                    var fullPath = Path.GetFullPath(file);
+                    if (!seen.Add(fullPath))
+                    {
+                        continue;
+                    }
+
+                    long size = 0;
+                    try
+                    {
+                        size = new FileInfo(fullPath).Length;
+                    }
+                    catch (IOException)
+                    {
+                    }
+
+                    var (title, titleId) = TryReadParamJson(fullPath);
+                    games.Add(new GameEntry(title ?? GameNameFor(fullPath), titleId, fullPath, size));
+                }
+            }
+            catch (Exception)
+            {
+                // Skip folders that fail to enumerate.
+            }
+        }
+
+        games.Sort((a, b) => string.Compare(a.Name, b.Name, StringComparison.OrdinalIgnoreCase));
+        return games;
+    }
+
+    /// <summary>
+    /// Reads the game title and title id from sce_sys/param.json next to the
+    /// executable, when present.
+    /// </summary>
+    private static (string? Title, string? TitleId) TryReadParamJson(string ebootPath)
+    {
+        try
+        {
+            var directory = Path.GetDirectoryName(ebootPath);
+            if (directory is null)
+            {
+                return (null, null);
+            }
+
+            var paramPath = Path.Combine(directory, "sce_sys", "param.json");
+            if (!File.Exists(paramPath))
+            {
+                return (null, null);
+            }
+
+            // ReadAllText handles a UTF-8 BOM, which JsonDocument rejects in
+            // raw bytes.
+            using var document = JsonDocument.Parse(File.ReadAllText(paramPath));
+            var root = document.RootElement;
+
+            string? titleId = null;
+            if (root.TryGetProperty("titleId", out var idElement) && idElement.ValueKind == JsonValueKind.String)
+            {
+                titleId = idElement.GetString();
+            }
+
+            string? title = null;
+            if (root.TryGetProperty("localizedParameters", out var localized) &&
+                localized.ValueKind == JsonValueKind.Object)
+            {
+                if (localized.TryGetProperty("defaultLanguage", out var language) &&
+                    language.ValueKind == JsonValueKind.String &&
+                    localized.TryGetProperty(language.GetString()!, out var defaultBlock) &&
+                    defaultBlock.ValueKind == JsonValueKind.Object &&
+                    defaultBlock.TryGetProperty("titleName", out var titleName) &&
+                    titleName.ValueKind == JsonValueKind.String)
+                {
+                    title = titleName.GetString();
+                }
+                else
+                {
+                    foreach (var property in localized.EnumerateObject())
+                    {
+                        if (property.Value.ValueKind == JsonValueKind.Object &&
+                            property.Value.TryGetProperty("titleName", out var anyTitleName) &&
+                            anyTitleName.ValueKind == JsonValueKind.String)
+                        {
+                            title = anyTitleName.GetString();
+                            break;
+                        }
+                    }
+                }
+            }
+
+            return (
+                string.IsNullOrWhiteSpace(title) ? null : title,
+                string.IsNullOrWhiteSpace(titleId) ? null : titleId);
+        }
+        catch (Exception)
+        {
+            return (null, null);
+        }
+    }
+
+    private static string GameNameFor(string ebootPath)
+    {
+        var directory = Path.GetDirectoryName(ebootPath);
+        var name = directory is not null ? Path.GetFileName(directory) : null;
+        return string.IsNullOrEmpty(name) ? Path.GetFileName(ebootPath) : name;
+    }
+
+    private void RefreshVisibleGames()
+    {
+        var query = SearchBox.Text?.Trim() ?? string.Empty;
+        var selected = GameList.SelectedItem as GameEntry;
+
+        _visibleGames.Clear();
+        foreach (var game in _allGames)
+        {
+            if (query.Length == 0 ||
+                game.Name.Contains(query, StringComparison.OrdinalIgnoreCase) ||
+                game.Path.Contains(query, StringComparison.OrdinalIgnoreCase))
+            {
+                _visibleGames.Add(game);
+            }
+        }
+
+        GameCountText.Text = _visibleGames.Count.ToString();
+        if (selected is not null && _visibleGames.Contains(selected))
+        {
+            GameList.SelectedItem = selected;
+        }
+
+        UpdateSelectedGame();
+    }
+
+    private void UpdateSelectedGame()
+    {
+        if (GameList.SelectedItem is GameEntry game)
+        {
+            SelectedGameTitle.Text = game.Name;
+            SelectedGamePath.Text = game.Path;
+        }
+        else
+        {
+            SelectedGameTitle.Text = "No game selected";
+            SelectedGamePath.Text = "Pick a game from the library, or open an eboot.bin directly.";
+        }
+
+        UpdateRunButtons();
+    }
+
+    // ---- Launching ----
+
+    private async Task OpenFileAsync()
+    {
+        var files = await StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
+        {
+            Title = "Open an executable to launch",
+            AllowMultiple = false,
+            FileTypeFilter = new[]
+            {
+                new FilePickerFileType("PS executables") { Patterns = new[] { "eboot.bin", "*.bin", "*.self", "*.elf" } },
+                FilePickerFileTypes.All,
+            },
+        });
+
+        var path = files.FirstOrDefault()?.TryGetLocalPath();
+        if (!string.IsNullOrEmpty(path))
+        {
+            Launch(path, Path.GetFileName(path));
+        }
+    }
+
+    private void LaunchSelected()
+    {
+        if (GameList.SelectedItem is GameEntry game)
+        {
+            Launch(game.Path, game.Name);
+        }
+    }
+
+    private void Launch(string ebootPath, string displayName)
+    {
+        if (_isRunning)
+        {
+            return;
+        }
+
+        if (_emulatorExePath is null)
+        {
+            LocateEmulator();
+            if (_emulatorExePath is null)
+            {
+                AppendConsoleLine("SharpEmu executable not found. Build the SharpEmu.CLI project first (dotnet build).", ErrorLineBrush);
+                return;
+            }
+        }
+
+        ReadControlsIntoSettings();
+        _settings.Save();
+
+        var arguments = new List<string>
+        {
+            "--cpu-engine=native",
+            $"--log-level={_settings.LogLevel.ToLowerInvariant()}",
+        };
+        if (_settings.StrictDynlibResolution)
+        {
+            arguments.Add("--strict");
+        }
+
+        if (_settings.ImportTraceLimit > 0)
+        {
+            arguments.Add($"--trace-imports={_settings.ImportTraceLimit}");
+        }
+
+        arguments.Add(ebootPath);
+
+        _consoleLines.Clear();
+        AppendConsoleLine($"$ SharpEmu {string.Join(' ', arguments)}", DimLineBrush);
+
+        var emulator = new EmulatorProcess();
+        emulator.OutputReceived += (line, isError) => _pendingLines.Enqueue((line, isError));
+        emulator.Exited += code => Dispatcher.UIThread.Post(() => OnEmulatorExited(code));
+
+        try
+        {
+            emulator.Start(_emulatorExePath, arguments, Path.GetDirectoryName(ebootPath));
+        }
+        catch (Exception ex)
+        {
+            emulator.Dispose();
+            AppendConsoleLine($"Failed to start the emulator: {ex.Message}", ErrorLineBrush);
+            return;
+        }
+
+        _emulator = emulator;
+        _isRunning = true;
+        StatusDot.Fill = SuccessLineBrush;
+        StatusText.Text = $"Running — {displayName}";
+        StatusBarRight.Text = $"Running {displayName}";
+        UpdateRunButtons();
+    }
+
+    private void OnEmulatorExited(int exitCode)
+    {
+        FlushPendingConsoleLines();
+        _isRunning = false;
+        _emulator?.Dispose();
+        _emulator = null;
+
+        var meaning = exitCode switch
+        {
+            0 => "OK",
+            1 => "invalid arguments",
+            2 => "eboot not found",
+            3 => "runtime exception",
+            4 => "emulation error",
+            _ => "unknown",
+        };
+        var brush = exitCode == 0 ? SuccessLineBrush : ErrorLineBrush;
+        AppendConsoleLine($"Process exited with code {exitCode} ({meaning}).", brush);
+
+        StatusDot.Fill = exitCode == 0 ? (IBrush)SuccessLineBrush : ErrorLineBrush;
+        StatusText.Text = $"Exited with code {exitCode} ({meaning})";
+        StatusBarRight.Text = "Idle";
+        UpdateRunButtons();
+    }
+
+    private void UpdateRunButtons()
+    {
+        LaunchButton.IsEnabled = !_isRunning && GameList.SelectedItem is GameEntry;
+        StopButton.IsEnabled = _isRunning;
+        OpenFileButton.IsEnabled = !_isRunning;
+    }
+
+    // ---- Console ----
+
+    private void FlushPendingConsoleLines()
+    {
+        if (_pendingLines.IsEmpty)
+        {
+            return;
+        }
+
+        var incoming = new List<LogLine>();
+        while (_pendingLines.TryDequeue(out var pending))
+        {
+            incoming.Add(new LogLine(pending.Line, BrushForLine(pending.Line)));
+        }
+
+        if (incoming.Count >= MaxConsoleLines)
+        {
+            // A burst larger than the cap: keep only the newest lines.
+            _consoleLines.Clear();
+            for (var i = incoming.Count - MaxConsoleLines; i < incoming.Count; i++)
+            {
+                _consoleLines.Add(incoming[i]);
+            }
+        }
+        else
+        {
+            var overflow = _consoleLines.Count + incoming.Count - MaxConsoleLines;
+            for (var i = 0; i < overflow; i++)
+            {
+                _consoleLines.RemoveAt(0);
+            }
+
+            foreach (var line in incoming)
+            {
+                _consoleLines.Add(line);
+            }
+        }
+
+        _autoScrollTicks = 3;
+    }
+
+    private void AppendConsoleLine(string text, IBrush brush)
+    {
+        _consoleLines.Add(new LogLine(text, brush));
+        _autoScrollTicks = 3;
+        MaybeAutoScroll();
+    }
+
+    private void MaybeAutoScroll()
+    {
+        // ScrollToEnd is applied over a few flush-timer ticks because the
+        // virtualizing panel re-estimates its extent after large batches, and
+        // a single scroll can land short of the true end. A synchronous
+        // ScrollIntoView during rapid adds is avoided entirely — it can crash
+        // the panel with "Invalid Arrange rectangle".
+        if (_autoScrollTicks <= 0 || AutoScrollCheck.IsChecked != true)
+        {
+            return;
+        }
+
+        _autoScrollTicks--;
+        (ConsoleList.Scroll as ScrollViewer)?.ScrollToEnd();
+    }
+
+    private static IBrush BrushForLine(string line)
+    {
+        if (line.Contains("[ERROR]", StringComparison.Ordinal) ||
+            line.Contains("[CRITICAL]", StringComparison.Ordinal))
+        {
+            return ErrorLineBrush;
+        }
+
+        if (line.Contains("[WARNING]", StringComparison.Ordinal))
+        {
+            return WarningLineBrush;
+        }
+
+        if (line.Contains("[INFO]", StringComparison.Ordinal))
+        {
+            return InfoLineBrush;
+        }
+
+        if (line.Contains("[DEBUG]", StringComparison.Ordinal) ||
+            line.Contains("[TRACE]", StringComparison.Ordinal))
+        {
+            return DimLineBrush;
+        }
+
+        return DefaultLineBrush;
+    }
+
+    private async Task CopyConsoleAsync()
+    {
+        if (_consoleLines.Count == 0 || Clipboard is null)
+        {
+            return;
+        }
+
+        var text = string.Join(Environment.NewLine, _consoleLines.Select(line => line.Text));
+        await Clipboard.SetTextAsync(text);
+    }
+}

src/SharpEmu.GUI/SharpEmu.GUI.csproj

@@ -0,0 +1,28 @@
+<!--
+Copyright (C) 2026 SharpEmu Emulator Project
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <!-- Class library: the GUI is hosted by SharpEmu.CLI, which opens it when
+       the executable is started without arguments. -->
+  <PropertyGroup>
+    <GenerateDocumentationFile>false</GenerateDocumentationFile>
+    <Version>0.0.1</Version>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia" />
+    <PackageReference Include="Avalonia.Desktop" />
+    <PackageReference Include="Avalonia.Fonts.Inter" />
+    <PackageReference Include="Avalonia.Themes.Fluent" />
+    <PackageReference Include="Tmds.DBus.Protocol" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <AvaloniaResource Include="..\..\assets\images\logo.png" Link="Assets/logo.png" />
+    <AvaloniaResource Include="..\..\assets\images\SharpEmu.ico" Link="Assets/SharpEmu.ico" />
+  </ItemGroup>
+
+</Project>

src/SharpEmu.GUI/packages.lock.json

@@ -0,0 +1,186 @@
+{
+  "version": 2,
+  "dependencies": {
+    "net10.0": {
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+        "dependencies": {
+          "Avalonia.BuildServices": "11.3.2",
+          "Avalonia.Remote.Protocol": "11.3.18",
+          "MicroCom.Runtime": "0.11.0"
+        }
+      },
+      "Avalonia.Desktop": {
+        "type": "Direct",
+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
+        "contentHash": "bilMPa5vYiis6fbNovb6esKytBnOCEGojBa1XFegLCRHCP6g6PvZwS0XF/YOAGkENRlHG8dI7lohOpQ9bIkq1g==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Avalonia.Native": "11.3.18",
+          "Avalonia.Skia": "11.3.18",
+          "Avalonia.Win32": "11.3.18",
+          "Avalonia.X11": "11.3.18"
+        }
+      },
+      "Avalonia.Fonts.Inter": {
+        "type": "Direct",
+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
+        "contentHash": "27u6hB3Y2Ue586yjfeVakberY73VNQXtuKwe/P927XG1QPlhsfmOyifLHDDpSHG85Zl1x/Xv9IZ3+tk9FnjcZQ==",
+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
+      },
+      "Avalonia.Themes.Fluent": {
+        "type": "Direct",
+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
+        "contentHash": "+Q/TJoynD0zNuu5w2gD+xcTl7GNKJFxlPYAndRLs/mTDrNbbsvv/271WyIysbMPsXSjCyBDp7RCZzQkpD6x5Bg==",
+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
+      },
+      "Tmds.DBus.Protocol": {
+        "type": "Direct",
+        "requested": "[0.21.3, )",
+        "resolved": "0.21.3",
+        "contentHash": "hDwB8WsQoyALQKqIbwzS68UKdlnafDm4T/DkO/JrA/YIneP/rKv96SxYPVXeh3FP4i/SXfShrYftKLtciJAIlw=="
+      },
+      "Avalonia.Angle.Windows.Natives": {
+        "type": "Transitive",
+        "resolved": "2.1.25547.20250602",
+        "contentHash": "ZL0VLc4s9rvNNFt19Pxm5UNAkmKNylugAwJPX9ulXZ6JWs/l6XZihPWWTyezaoNOVyEPU8YbURtW7XMAtqXH5A=="
+      },
+      "Avalonia.BuildServices": {
+        "type": "Transitive",
+        "resolved": "11.3.2",
+        "contentHash": "qHDToxto1e3hci5YqbG9n0Ty8mlp3zBUN5wT66wKqaDVzXyQ0do3EnRILd4Ke9jpvsktaPpgE0YjEk7hornryQ=="
+      },
+      "Avalonia.FreeDesktop": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "aUwv8BNruRUOaUfMu4U3uibIUS60/rSHgGOhd8zBkLkpxY3JFJvgRbeq5ZzHIyKXCuKi18PO00YHAgCarp3wdw==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Tmds.DBus.Protocol": "0.21.3"
+        }
+      },
+      "Avalonia.Native": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "8g53DROFW6wVJAnTsE1Iu5bdZO5r0oqxbdbMQODs1QDYCK2IU/y/x/vQVKCYOvqxl4tXkzU9tExv8XqSGPWthQ==",
+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
+      },
+      "Avalonia.Remote.Protocol": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "vw+6ZfgTuu72dA9aVWn6u56t2nrBd5MoMU0wo/qI9XJAl/c0oYYphIvwLvJP1JorubQY4UE3d0ac8ULBhrGBiA=="
+      },
+      "Avalonia.Skia": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "/B4aXmNRNjG8I5U/a1xJI+bIi0XO6DDzS3mBrIKlVnJRY2CyZiUeESRQXLnIU77Z9TvqkUROs+D47s085YjFtA==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "HarfBuzzSharp": "8.3.1.1",
+          "HarfBuzzSharp.NativeAssets.Linux": "8.3.1.1",
+          "HarfBuzzSharp.NativeAssets.WebAssembly": "8.3.1.1",
+          "SkiaSharp": "2.88.9",
+          "SkiaSharp.NativeAssets.Linux": "2.88.9",
+          "SkiaSharp.NativeAssets.WebAssembly": "2.88.9"
+        }
+      },
+      "Avalonia.Win32": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "eioUHkM2PeLPETd1aEks3rvb9plbba6buIrNdrqCpwE/qgHKUjvRNBd5mUQfAbGgTLiAes524gB8uUMDhrsJVQ==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Avalonia.Angle.Windows.Natives": "2.1.25547.20250602"
+        }
+      },
+      "Avalonia.X11": {
+        "type": "Transitive",
+        "resolved": "11.3.18",
+        "contentHash": "m4Ki/G5Dovnq+6QzfS0iGbK8V77Q6oTjToMLOB0CxPCCrl3Oxywh6kIjuGJDPaN6kopMmjxlNShyQf+vPYL+JA==",
+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Avalonia.FreeDesktop": "11.3.18",
+          "Avalonia.Skia": "11.3.18"
+        }
+      },
+      "HarfBuzzSharp": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "tLZN66oe/uiRPTZfrCU4i8ScVGwqHNh5MHrXj0yVf4l7Mz0FhTGnQ71RGySROTmdognAs0JtluHkL41pIabWuQ==",
+        "dependencies": {
+          "HarfBuzzSharp.NativeAssets.Win32": "8.3.1.1",
+          "HarfBuzzSharp.NativeAssets.macOS": "8.3.1.1"
+        }
+      },
+      "HarfBuzzSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "3EZ1mpIiKWRLL5hUYA82ZHteeDIVaEA/Z0rA/wU6tjx6crcAkJnBPwDXZugBSfo8+J3EznvRJf49uMsqYfKrHg=="
+      },
+      "HarfBuzzSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "jbtCsgftcaFLCA13tVKo5iWdElJScrulLTKJre36O4YQTIlwDtPPqhRZNk+Y0vv4D1gxbscasGRucUDfS44ofQ=="
+      },
+      "HarfBuzzSharp.NativeAssets.WebAssembly": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "loJweK2u/mH/3C2zBa0ggJlITIszOkK64HLAZB7FUT670dTg965whLFYHDQo69NmC4+d9UN0icLC9VHidXaVCA=="
+      },
+      "HarfBuzzSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "8.3.1.1",
+        "contentHash": "UsJtQsfAJoFDZrXc4hCUfRPMqccfKZ0iumJ/upcUjz/cmsTgVFGNEL5yaJWmkqsuFYdMWbj/En5/kS4PFl9hBA=="
+      },
+      "MicroCom.Runtime": {
+        "type": "Transitive",
+        "resolved": "0.11.0",
+        "contentHash": "MEnrZ3UIiH40hjzMDsxrTyi8dtqB5ziv3iBeeU4bXsL/7NLSal9F1lZKpK+tfBRnUoDSdtcW3KufE4yhATOMCA=="
+      },
+      "SkiaSharp": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "3MD5VHjXXieSHCleRLuaTXmL2pD0mB7CcOB1x2kA1I4bhptf4e3R27iM93264ZYuAq6mkUyX5XbcxnZvMJYc1Q==",
+        "dependencies": {
+          "SkiaSharp.NativeAssets.Win32": "2.88.9",
+          "SkiaSharp.NativeAssets.macOS": "2.88.9"
+        }
+      },
+      "SkiaSharp.NativeAssets.Linux": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "cWSaJKVPWAaT/WIn9c8T5uT/l4ETwHxNJTkEOtNKjphNo8AW6TF9O32aRkxqw3l8GUdUo66Bu7EiqtFh/XG0Zg==",
+        "dependencies": {
+          "SkiaSharp": "2.88.9"
+        }
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "Nv5spmKc4505Ep7oUoJ5vp3KweFpeNqxpyGDWyeEPTX2uR6S6syXIm3gj75dM0YJz7NPvcix48mR5laqs8dPuA=="
+      },
+      "SkiaSharp.NativeAssets.WebAssembly": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "kt06RccBHSnAs2wDYdBSfsjIDbY3EpsOVqnlDgKdgvyuRA8ZFDaHRdWNx1VHjGgYzmnFCGiTJBnXFl5BqGwGnA=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "2.88.9",
+        "contentHash": "wb2kYgU7iy84nQLYZwMeJXixvK++GoIuECjU4ECaUKNuflyRlJKyiRhN1MAHswvlvzuvkrjRWlK0Za6+kYQK7w=="
+      }
+    }
+  }
+}

src/SharpEmu.HLE/CpuContext.cs

@@ -2,25 +2,20 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 using System.Buffers.Binary;
+using System.Text;
 
 namespace SharpEmu.HLE;
 
-public sealed class CpuContext
+public sealed class CpuContext(ICpuMemory memory, Generation generation)
 {
     private readonly ulong[] _registers = new ulong[16];
     private readonly ulong[] _xmmRegisters = new ulong[32];
     private readonly ulong[] _ymmUpperRegisters = new ulong[32];
     private bool _raxWritten;
 
-    public CpuContext(ICpuMemory memory, Generation generation)
-    {
-        Memory = memory ?? throw new ArgumentNullException(nameof(memory));
-        TargetGeneration = generation;
-    }
+    public ICpuMemory Memory { get; } = memory ?? throw new ArgumentNullException(nameof(memory));
 
-    public ICpuMemory Memory { get; }
-
-    public Generation TargetGeneration { get; }
+    public Generation TargetGeneration { get; } = generation;
 
     public ulong Rip { get; set; }
 
@@ -130,6 +125,39 @@ public sealed class CpuContext
         SetYmmUpper(registerIndex, highLow, highHigh);
     }
 
+    public bool TryReadByte(ulong address, out byte value)
+    {
+        Span<byte> buffer = stackalloc byte[1];
+        if (!Memory.TryRead(address, buffer))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = buffer[0];
+        return true;
+    }
+
+    public bool TryReadUInt32(ulong address, out uint value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(uint)];
+        if (!Memory.TryRead(address, buffer))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt32LittleEndian(buffer);
+        return true;
+    }
+
+    public bool TryWriteUInt32(ulong address, uint value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(buffer, value);
+        return Memory.TryWrite(address, buffer);
+    }
+
     public bool TryReadUInt64(ulong address, out ulong value)
     {
         Span<byte> buffer = stackalloc byte[sizeof(ulong)];
@@ -150,6 +178,33 @@ public sealed class CpuContext
         return Memory.TryWrite(address, buffer);
     }
 
+    public bool TryReadNullTerminatedUtf8(ulong address, int capacity, out string value)
+    {
+        value = string.Empty;
+        if (address == 0 || capacity <= 0)
+        {
+            return false;
+        }
+
+        var bytes = new byte[capacity];
+        for (var index = 0; index < bytes.Length; index++)
+        {
+            if (!Memory.TryRead(address + (ulong)index, bytes.AsSpan(index, 1)))
+            {
+                return false;
+            }
+
+            if (bytes[index] == 0)
+            {
+                value = Encoding.UTF8.GetString(bytes, 0, index);
+                return true;
+            }
+        }
+
+        value = Encoding.UTF8.GetString(bytes);
+        return true;
+    }
+
     public bool PushUInt64(ulong value)
     {
         var rsp = this[CpuRegister.Rsp];

src/SharpEmu.HLE/GuestThreadExecution.cs

@@ -0,0 +1,456 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Diagnostics;
+
+namespace SharpEmu.HLE;
+
+public readonly record struct GuestThreadStartRequest(
+    ulong ThreadHandle,
+    ulong EntryPoint,
+    ulong Argument,
+    ulong AttributeAddress,
+    string Name,
+    int Priority,
+    ulong AffinityMask);
+
+public readonly record struct GuestThreadSnapshot(
+    ulong ThreadHandle,
+    string Name,
+    string State,
+    long ImportCount,
+    string? LastImportNid,
+    ulong LastReturnRip,
+    string? BlockReason);
+
+public interface IGuestThreadScheduler
+{
+    bool SupportsGuestContextTransfer { get; }
+
+    bool TryStartThread(CpuContext creatorContext, GuestThreadStartRequest request, out string? error);
+
+    bool TryJoinThread(
+        CpuContext callerContext,
+        ulong threadHandle,
+        out ulong returnValue,
+        out string? error);
+
+    void Pump(CpuContext callerContext, string reason);
+
+    int WakeBlockedThreads(string wakeKey, int maxCount = int.MaxValue);
+
+    IReadOnlyList<GuestThreadSnapshot> SnapshotThreads();
+
+    bool TryCallGuestFunction(
+        CpuContext callerContext,
+        ulong entryPoint,
+        ulong arg0,
+        ulong arg1,
+        ulong stackAddress,
+        ulong stackSize,
+        string reason,
+        out string? error);
+
+    bool TryCallGuestContinuation(
+        CpuContext callerContext,
+        GuestCpuContinuation continuation,
+        string reason,
+        out string? error);
+}
+
+public readonly record struct GuestImportCallFrame(
+    bool IsValid,
+    ulong ReturnRip,
+    ulong ResumeRsp,
+    ulong ReturnSlotAddress);
+
+public readonly record struct GuestCpuContinuation(
+    ulong Rip,
+    ulong Rsp,
+    ulong ReturnSlotAddress,
+    ulong Rflags,
+    ulong FsBase,
+    ulong GsBase,
+    ulong Rax,
+    ulong Rcx,
+    ulong Rdx,
+    ulong Rbx,
+    ulong Rbp,
+    ulong Rsi,
+    ulong Rdi,
+    ulong R8,
+    ulong R9,
+    ulong R12,
+    ulong R13,
+    ulong R14,
+    ulong R15);
+
+public static class GuestThreadExecution
+{
+    [ThreadStatic]
+    private static ulong _currentGuestThreadHandle;
+
+    [ThreadStatic]
+    private static ulong _currentFiberAddress;
+
+    [ThreadStatic]
+    private static string? _pendingBlockReason;
+
+    [ThreadStatic]
+    private static bool _pendingBlockContinuationValid;
+
+    [ThreadStatic]
+    private static GuestCpuContinuation _pendingBlockContinuation;
+
+    [ThreadStatic]
+    private static string? _pendingBlockWakeKey;
+
+    [ThreadStatic]
+    private static Func<int>? _pendingBlockResumeHandler;
+
+    [ThreadStatic]
+    private static Func<bool>? _pendingBlockWakeHandler;
+
+    [ThreadStatic]
+    private static long _pendingBlockDeadlineTimestamp;
+
+    [ThreadStatic]
+    private static bool _pendingEntryExit;
+
+    [ThreadStatic]
+    private static ulong _pendingEntryExitValue;
+
+    [ThreadStatic]
+    private static string? _pendingEntryExitReason;
+
+    [ThreadStatic]
+    private static bool _pendingContextTransfer;
+
+    [ThreadStatic]
+    private static GuestCpuContinuation _pendingContextTransferTarget;
+
+    [ThreadStatic]
+    private static bool _hasCurrentImportCallFrame;
+
+    [ThreadStatic]
+    private static ulong _currentImportReturnRip;
+
+    [ThreadStatic]
+    private static ulong _currentImportResumeRsp;
+
+    [ThreadStatic]
+    private static ulong _currentImportReturnSlotAddress;
+
+    public static IGuestThreadScheduler? Scheduler { get; set; }
+
+    public static bool IsGuestThread => _currentGuestThreadHandle != 0;
+
+    public static ulong CurrentGuestThreadHandle => _currentGuestThreadHandle;
+
+    public static ulong CurrentFiberAddress => _currentFiberAddress;
+
+    public static ulong EnterGuestThread(ulong threadHandle)
+    {
+        var previous = _currentGuestThreadHandle;
+        _currentGuestThreadHandle = threadHandle;
+        _pendingBlockReason = null;
+        _pendingBlockContinuationValid = false;
+        _pendingBlockContinuation = default;
+        _pendingBlockWakeKey = null;
+        _pendingBlockResumeHandler = null;
+        _pendingBlockWakeHandler = null;
+        _pendingBlockDeadlineTimestamp = 0;
+        _pendingEntryExit = false;
+        _pendingEntryExitValue = 0;
+        _pendingEntryExitReason = null;
+        _pendingContextTransfer = false;
+        _pendingContextTransferTarget = default;
+        _hasCurrentImportCallFrame = false;
+        _currentImportReturnRip = 0;
+        _currentImportResumeRsp = 0;
+        _currentImportReturnSlotAddress = 0;
+        return previous;
+    }
+
+    public static void RestoreGuestThread(ulong previousThreadHandle)
+    {
+        _currentGuestThreadHandle = previousThreadHandle;
+        _pendingBlockReason = null;
+        _pendingBlockContinuationValid = false;
+        _pendingBlockContinuation = default;
+        _pendingBlockWakeKey = null;
+        _pendingBlockResumeHandler = null;
+        _pendingBlockWakeHandler = null;
+        _pendingBlockDeadlineTimestamp = 0;
+        _pendingEntryExit = false;
+        _pendingEntryExitValue = 0;
+        _pendingEntryExitReason = null;
+        _pendingContextTransfer = false;
+        _pendingContextTransferTarget = default;
+        _hasCurrentImportCallFrame = false;
+        _currentImportReturnRip = 0;
+        _currentImportResumeRsp = 0;
+        _currentImportReturnSlotAddress = 0;
+    }
+
+    public static ulong EnterFiber(ulong fiberAddress)
+    {
+        var previous = _currentFiberAddress;
+        _currentFiberAddress = fiberAddress;
+        return previous;
+    }
+
+    public static void RestoreFiber(ulong previousFiberAddress)
+    {
+        _currentFiberAddress = previousFiberAddress;
+    }
+
+    public static bool RequestCurrentThreadBlock(string reason) => RequestCurrentThreadBlock(null, reason);
+
+    public static bool RequestCurrentThreadBlock(
+        CpuContext? context,
+        string reason,
+        string? wakeKey = null,
+        Func<int>? resumeHandler = null,
+        Func<bool>? wakeHandler = null,
+        long blockDeadlineTimestamp = 0)
+    {
+        if (!IsGuestThread)
+        {
+            return false;
+        }
+
+        _pendingBlockReason = string.IsNullOrWhiteSpace(reason) ? "guest_thread_blocked" : reason;
+        _pendingBlockWakeKey = string.IsNullOrWhiteSpace(wakeKey) ? _pendingBlockReason : wakeKey;
+        _pendingBlockResumeHandler = resumeHandler;
+        _pendingBlockWakeHandler = wakeHandler;
+        _pendingBlockDeadlineTimestamp = blockDeadlineTimestamp;
+        if (context is not null && TryCaptureCurrentBlockContinuation(context, out var continuation))
+        {
+            _pendingBlockContinuation = continuation;
+            _pendingBlockContinuationValid = true;
+        }
+        else
+        {
+            _pendingBlockContinuation = default;
+            _pendingBlockContinuationValid = false;
+        }
+
+        return true;
+    }
+
+    public static bool TryConsumeCurrentThreadBlock(out string reason)
+    {
+        return TryConsumeCurrentThreadBlock(out reason, out _, out _);
+    }
+
+    public static bool TryConsumeCurrentThreadBlock(
+        out string reason,
+        out GuestCpuContinuation continuation,
+        out bool hasContinuation)
+    {
+        return TryConsumeCurrentThreadBlock(
+            out reason,
+            out continuation,
+            out hasContinuation,
+            out _,
+            out _,
+            out _,
+            out _);
+    }
+
+    public static bool TryConsumeCurrentThreadBlock(
+        out string reason,
+        out GuestCpuContinuation continuation,
+        out bool hasContinuation,
+        out string wakeKey,
+        out Func<int>? resumeHandler,
+        out Func<bool>? wakeHandler)
+    {
+        return TryConsumeCurrentThreadBlock(
+            out reason,
+            out continuation,
+            out hasContinuation,
+            out wakeKey,
+            out resumeHandler,
+            out wakeHandler,
+            out _);
+    }
+
+    public static bool TryConsumeCurrentThreadBlock(
+        out string reason,
+        out GuestCpuContinuation continuation,
+        out bool hasContinuation,
+        out string wakeKey,
+        out Func<int>? resumeHandler,
+        out Func<bool>? wakeHandler,
+        out long blockDeadlineTimestamp)
+    {
+        reason = _pendingBlockReason ?? string.Empty;
+        if (string.IsNullOrEmpty(reason))
+        {
+            continuation = default;
+            hasContinuation = false;
+            wakeKey = string.Empty;
+            resumeHandler = null;
+            wakeHandler = null;
+            blockDeadlineTimestamp = 0;
+            return false;
+        }
+
+        continuation = _pendingBlockContinuation;
+        hasContinuation = _pendingBlockContinuationValid;
+        wakeKey = _pendingBlockWakeKey ?? reason;
+        resumeHandler = _pendingBlockResumeHandler;
+        wakeHandler = _pendingBlockWakeHandler;
+        blockDeadlineTimestamp = _pendingBlockDeadlineTimestamp;
+        _pendingBlockReason = null;
+        _pendingBlockContinuation = default;
+        _pendingBlockContinuationValid = false;
+        _pendingBlockWakeKey = null;
+        _pendingBlockResumeHandler = null;
+        _pendingBlockWakeHandler = null;
+        _pendingBlockDeadlineTimestamp = 0;
+        return true;
+    }
+
+    public static long ComputeDeadlineTimestamp(TimeSpan timeout)
+    {
+        if (timeout <= TimeSpan.Zero)
+        {
+            return Stopwatch.GetTimestamp();
+        }
+
+        var ticks = timeout.TotalSeconds >= long.MaxValue / (double)Stopwatch.Frequency
+            ? long.MaxValue
+            : (long)Math.Ceiling(timeout.TotalSeconds * Stopwatch.Frequency);
+        var now = Stopwatch.GetTimestamp();
+        if (long.MaxValue - now <= ticks)
+        {
+            return long.MaxValue;
+        }
+
+        return now + Math.Max(1, ticks);
+    }
+
+    private static bool TryCaptureCurrentBlockContinuation(CpuContext context, out GuestCpuContinuation continuation)
+    {
+        if (!TryGetCurrentImportCallFrame(out var frame) ||
+            frame.ReturnRip < 65536 ||
+            frame.ResumeRsp == 0 ||
+            frame.ReturnSlotAddress == 0)
+        {
+            continuation = default;
+            return false;
+        }
+
+        continuation = new GuestCpuContinuation(
+            frame.ReturnRip,
+            frame.ResumeRsp,
+            frame.ReturnSlotAddress,
+            context.Rflags,
+            context.FsBase,
+            context.GsBase,
+            0,
+            context[CpuRegister.Rcx],
+            context[CpuRegister.Rdx],
+            context[CpuRegister.Rbx],
+            context[CpuRegister.Rbp],
+            context[CpuRegister.Rsi],
+            context[CpuRegister.Rdi],
+            context[CpuRegister.R8],
+            context[CpuRegister.R9],
+            context[CpuRegister.R12],
+            context[CpuRegister.R13],
+            context[CpuRegister.R14],
+            context[CpuRegister.R15]);
+        return true;
+    }
+
+    public static void RequestCurrentEntryExit(string reason, int status)
+    {
+        RequestCurrentEntryExit(reason, unchecked((ulong)(long)status));
+    }
+
+    public static void RequestCurrentEntryExit(string reason, ulong value)
+    {
+        _pendingEntryExit = true;
+        _pendingEntryExitValue = value;
+        _pendingEntryExitReason = string.IsNullOrWhiteSpace(reason) ? "guest_entry_exit" : reason;
+    }
+
+    public static bool TryConsumeCurrentEntryExit(out ulong value, out string reason)
+    {
+        value = _pendingEntryExitValue;
+        reason = _pendingEntryExitReason ?? string.Empty;
+        if (!_pendingEntryExit)
+        {
+            return false;
+        }
+
+        _pendingEntryExit = false;
+        _pendingEntryExitValue = 0;
+        _pendingEntryExitReason = null;
+        return true;
+    }
+
+    public static void RequestCurrentContextTransfer(GuestCpuContinuation target)
+    {
+        _pendingContextTransferTarget = target;
+        _pendingContextTransfer = true;
+    }
+
+    public static bool TryConsumeCurrentContextTransfer(out GuestCpuContinuation target)
+    {
+        target = _pendingContextTransferTarget;
+        if (!_pendingContextTransfer)
+        {
+            return false;
+        }
+
+        _pendingContextTransfer = false;
+        _pendingContextTransferTarget = default;
+        return true;
+    }
+
+    public static GuestImportCallFrame EnterImportCallFrame(
+        ulong returnRip,
+        ulong resumeRsp,
+        ulong returnSlotAddress)
+    {
+        var previous = new GuestImportCallFrame(
+            _hasCurrentImportCallFrame,
+            _currentImportReturnRip,
+            _currentImportResumeRsp,
+            _currentImportReturnSlotAddress);
+        _hasCurrentImportCallFrame = true;
+        _currentImportReturnRip = returnRip;
+        _currentImportResumeRsp = resumeRsp;
+        _currentImportReturnSlotAddress = returnSlotAddress;
+        return previous;
+    }
+
+    public static void RestoreImportCallFrame(GuestImportCallFrame previous)
+    {
+        _hasCurrentImportCallFrame = previous.IsValid;
+        _currentImportReturnRip = previous.ReturnRip;
+        _currentImportResumeRsp = previous.ResumeRsp;
+        _currentImportReturnSlotAddress = previous.ReturnSlotAddress;
+    }
+
+    public static bool TryGetCurrentImportCallFrame(out GuestImportCallFrame frame)
+    {
+        if (!_hasCurrentImportCallFrame)
+        {
+            frame = default;
+            return false;
+        }
+
+        frame = new GuestImportCallFrame(
+            true,
+            _currentImportReturnRip,
+            _currentImportResumeRsp,
+            _currentImportReturnSlotAddress);
+        return true;
+    }
+}

src/SharpEmu.HLE/IGuestMemoryAllocator.cs

@@ -0,0 +1,9 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+namespace SharpEmu.HLE;
+
+public interface IGuestMemoryAllocator
+{
+    bool TryAllocateGuestMemory(ulong size, ulong alignment, out ulong address);
+}

src/SharpEmu.HLE/SharpEmu.HLE.csproj

@@ -8,6 +8,10 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
+  <PropertyGroup>
+    <NoWarn>$(NoWarn);1591</NoWarn>
+  </PropertyGroup>
+
   <ItemGroup>
     <EmbeddedResource Include="Aerolib\aerolib.bin" />
   </ItemGroup>

src/SharpEmu.Libs/Agc/Gen5ShaderIr.cs

@@ -0,0 +1,313 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+namespace SharpEmu.Libs.Agc;
+
+internal enum Gen5ShaderEncoding
+{
+    Sop1,
+    Sop2,
+    Sopc,
+    Sopp,
+    Sopk,
+    Smrd,
+    Smem,
+    Mubuf,
+    Mtbuf,
+    Vop1,
+    Vop2,
+    Vopc,
+    Vop3,
+    Vintrp,
+    Ds,
+    Flat,
+    Vop3p,
+    Mimg,
+    Exp,
+}
+
+internal enum Gen5OperandKind
+{
+    ScalarRegister,
+    VectorRegister,
+    EncodedConstant,
+    LiteralConstant,
+}
+
+internal enum Gen5ShaderResourceKind
+{
+    ReadOnlyTexture,
+    ReadWriteTexture,
+    Sampler,
+    ConstantBuffer,
+}
+
+internal enum Gen5PixelOutputKind
+{
+    Float,
+    Uint,
+    Sint,
+}
+
+internal enum Gen5SpirvStage
+{
+    Vertex,
+    Pixel,
+    Compute,
+}
+
+internal sealed record Gen5SpirvShader(
+    byte[] Spirv,
+    IReadOnlyList<Gen5GlobalMemoryBinding> GlobalMemoryBindings,
+    IReadOnlyList<Gen5ImageBinding> ImageBindings,
+    uint AttributeCount,
+    IReadOnlyList<Gen5VertexInputBinding> VertexInputs);
+
+internal readonly record struct Gen5ShaderResourceMapping(
+    Gen5ShaderResourceKind Kind,
+    uint Slot,
+    uint OffsetDwords,
+    bool SizeFlag);
+
+internal sealed record Gen5ShaderMetadata(
+    uint ExtendedUserDataSizeDwords,
+    uint ShaderResourceTableSizeDwords,
+    IReadOnlyDictionary<uint, uint> DirectResources,
+    IReadOnlyList<Gen5ShaderResourceMapping> Resources);
+
+internal readonly record struct Gen5ComputeSystemRegisters(
+    uint? WorkGroupXRegister,
+    uint? WorkGroupYRegister,
+    uint? WorkGroupZRegister,
+    uint? ThreadGroupSizeRegister)
+{
+    public bool TryGetExpression(uint scalarRegister, out string expression)
+    {
+        if (WorkGroupXRegister == scalarRegister)
+        {
+            expression = "gl_WorkGroupID.x";
+            return true;
+        }
+
+        if (WorkGroupYRegister == scalarRegister)
+        {
+            expression = "gl_WorkGroupID.y";
+            return true;
+        }
+
+        if (WorkGroupZRegister == scalarRegister)
+        {
+            expression = "gl_WorkGroupID.z";
+            return true;
+        }
+
+        if (ThreadGroupSizeRegister == scalarRegister)
+        {
+            expression = "(gl_WorkGroupSize.x * gl_WorkGroupSize.y * gl_WorkGroupSize.z)";
+            return true;
+        }
+
+        expression = string.Empty;
+        return false;
+    }
+
+    public void ClearStaticValues(Span<uint> scalarRegisters)
+    {
+        ClearStaticValue(scalarRegisters, WorkGroupXRegister);
+        ClearStaticValue(scalarRegisters, WorkGroupYRegister);
+        ClearStaticValue(scalarRegisters, WorkGroupZRegister);
+        ClearStaticValue(scalarRegisters, ThreadGroupSizeRegister);
+    }
+
+    private static void ClearStaticValue(Span<uint> scalarRegisters, uint? scalarRegister)
+    {
+        if (scalarRegister is { } register && register < scalarRegisters.Length)
+        {
+            scalarRegisters[(int)register] = 0;
+        }
+    }
+}
+
+internal sealed record Gen5ShaderState(
+    Gen5ShaderProgram Program,
+    IReadOnlyList<uint> UserData,
+    Gen5ShaderMetadata? Metadata,
+    Gen5ComputeSystemRegisters? ComputeSystemRegisters = null,
+    uint UserDataScalarRegisterBase = 0);
+
+internal readonly record struct Gen5Operand(Gen5OperandKind Kind, uint Value)
+{
+    public static Gen5Operand Scalar(uint index) =>
+        new(Gen5OperandKind.ScalarRegister, index);
+
+    public static Gen5Operand Vector(uint index) =>
+        new(Gen5OperandKind.VectorRegister, index);
+
+    public static Gen5Operand Source(uint encoded, uint? literal = null)
+    {
+        if (encoded >= 256)
+        {
+            return Vector(encoded - 256);
+        }
+
+        if (encoded is 249 or 255 && literal.HasValue)
+        {
+            return new(Gen5OperandKind.LiteralConstant, literal.Value);
+        }
+
+        if (encoded <= 105 || encoded is 106 or 107 or 124 or 126 or 127)
+        {
+            return Scalar(encoded);
+        }
+
+        return new(Gen5OperandKind.EncodedConstant, encoded);
+    }
+
+    public override string ToString() => Kind switch
+    {
+        Gen5OperandKind.ScalarRegister => $"s{Value}",
+        Gen5OperandKind.VectorRegister => $"v{Value}",
+        Gen5OperandKind.LiteralConstant => $"0x{Value:X8}",
+        _ => $"src[{Value}]",
+    };
+}
+
+internal abstract record Gen5InstructionControl;
+
+internal sealed record Gen5ImageControl(
+    uint Dmask,
+    uint VectorAddress,
+    IReadOnlyList<uint> AddressRegisters,
+    uint VectorData,
+    uint ScalarResource,
+    uint ScalarSampler,
+    uint Dimension,
+    bool IsArray,
+    bool Glc,
+    bool Slc) : Gen5InstructionControl
+{
+    public uint GetAddressRegister(int component) =>
+        component < AddressRegisters.Count
+            ? AddressRegisters[component]
+            : VectorAddress + (uint)component;
+}
+
+internal sealed record Gen5GlobalMemoryControl(
+    uint DwordCount,
+    uint VectorAddress,
+    uint VectorData,
+    uint ScalarAddress,
+    int OffsetBytes,
+    bool Glc,
+    bool Slc) : Gen5InstructionControl;
+
+internal sealed record Gen5BufferMemoryControl(
+    uint DwordCount,
+    uint VectorAddress,
+    uint VectorData,
+    uint ScalarResource,
+    int OffsetBytes,
+    bool IndexEnabled,
+    bool OffsetEnabled,
+    bool Glc,
+    bool Slc) : Gen5InstructionControl;
+
+internal sealed record Gen5ExportControl(
+    uint Target,
+    uint EnableMask,
+    bool Compressed,
+    bool Done,
+    bool ValidMask) : Gen5InstructionControl;
+
+internal sealed record Gen5InterpolationControl(
+    uint Attribute,
+    uint Channel) : Gen5InstructionControl;
+
+internal sealed record Gen5Vop3Control(
+    uint AbsoluteMask,
+    uint NegateMask,
+    uint OutputModifier,
+    bool Clamp,
+    uint? ScalarDestination) : Gen5InstructionControl;
+
+internal sealed record Gen5SdwaControl(
+    uint DestinationSelect,
+    uint Source0Select,
+    uint Source1Select,
+    uint AbsoluteMask,
+    uint NegateMask,
+    uint OutputModifier,
+    bool Clamp) : Gen5InstructionControl;
+
+internal sealed record Gen5DppControl(
+    uint Control,
+    bool FetchInactive,
+    bool BoundControl,
+    uint AbsoluteMask,
+    uint NegateMask,
+    uint BankMask,
+    uint RowMask) : Gen5InstructionControl;
+
+internal sealed record Gen5ScalarMemoryControl(
+    uint DestinationCount,
+    int ImmediateOffsetBytes,
+    uint? DynamicOffsetRegister) : Gen5InstructionControl;
+
+internal sealed record Gen5DataShareControl(
+    uint Offset0,
+    uint Offset1,
+    bool Gds) : Gen5InstructionControl;
+
+internal sealed record Gen5ImageBinding(
+    uint Pc,
+    string Opcode,
+    Gen5ImageControl Control,
+    IReadOnlyList<uint> ResourceDescriptor,
+    IReadOnlyList<uint> SamplerDescriptor,
+    uint? MipLevel);
+
+internal sealed record Gen5GlobalMemoryBinding(
+    uint ScalarAddress,
+    ulong BaseAddress,
+    IReadOnlyList<uint> InstructionPcs,
+    byte[] Data);
+
+internal sealed record Gen5VertexInputBinding(
+    uint Pc,
+    uint Location,
+    uint ComponentCount,
+    uint DataFormat,
+    uint NumberFormat,
+    ulong BaseAddress,
+    uint Stride,
+    uint OffsetBytes,
+    byte[] Data);
+
+internal sealed record Gen5ShaderEvaluation(
+    IReadOnlyList<uint> InitialScalarRegisters,
+    IReadOnlyList<uint> ScalarRegisters,
+    IReadOnlyDictionary<uint, IReadOnlyList<uint>> ScalarRegistersByPc,
+    IReadOnlyList<Gen5ImageBinding> ImageBindings,
+    IReadOnlyList<Gen5GlobalMemoryBinding> GlobalMemoryBindings,
+    Gen5ComputeSystemRegisters? ComputeSystemRegisters = null,
+    IReadOnlySet<uint>? RuntimeScalarRegisters = null,
+    IReadOnlyList<Gen5VertexInputBinding>? VertexInputs = null);
+
+internal sealed record Gen5ShaderInstruction(
+    uint Pc,
+    Gen5ShaderEncoding Encoding,
+    string Opcode,
+    IReadOnlyList<uint> Words,
+    IReadOnlyList<Gen5Operand> Sources,
+    IReadOnlyList<Gen5Operand> Destinations,
+    Gen5InstructionControl? Control);
+
+internal sealed record Gen5ShaderProgram(
+    ulong Address,
+    IReadOnlyList<Gen5ShaderInstruction> Instructions)
+{
+    public IEnumerable<Gen5ImageControl> ImageResources =>
+        Instructions
+            .Select(instruction => instruction.Control)
+            .OfType<Gen5ImageControl>();
+}

src/SharpEmu.Libs/Agc/Gen5ShaderMetadataReader.cs

@@ -0,0 +1,140 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+
+namespace SharpEmu.Libs.Agc;
+
+internal static class Gen5ShaderMetadataReader
+{
+    private const ulong ShaderUserDataOffset = 0x08;
+    private const int ResourceClassCount = 4;
+    private const int MaxMetadataEntries = 4096;
+
+    public static bool TryRead(
+        CpuContext ctx,
+        ulong shaderHeaderAddress,
+        out Gen5ShaderMetadata metadata)
+    {
+        metadata = default!;
+        if (!ctx.TryReadUInt64(shaderHeaderAddress + ShaderUserDataOffset, out var userDataAddress) ||
+            userDataAddress == 0 ||
+            !ctx.TryReadUInt64(userDataAddress, out var directResourceOffsetsAddress))
+        {
+            return false;
+        }
+
+        var resourceOffsets = new ulong[ResourceClassCount];
+        for (var resourceClass = 0; resourceClass < ResourceClassCount; resourceClass++)
+        {
+            if (!ctx.TryReadUInt64(
+                    userDataAddress + 0x08 + (ulong)(resourceClass * sizeof(ulong)),
+                    out resourceOffsets[resourceClass]))
+            {
+                return false;
+            }
+        }
+
+        if (!TryReadUInt16(ctx, userDataAddress + 0x28, out var extendedUserDataSize) ||
+            !TryReadUInt16(ctx, userDataAddress + 0x2A, out var shaderResourceTableSize) ||
+            !TryReadUInt16(ctx, userDataAddress + 0x2C, out var directResourceCount) ||
+            directResourceCount > MaxMetadataEntries)
+        {
+            return false;
+        }
+
+        var resourceCounts = new ushort[ResourceClassCount];
+        for (var resourceClass = 0; resourceClass < ResourceClassCount; resourceClass++)
+        {
+            if (!TryReadUInt16(
+                    ctx,
+                    userDataAddress + 0x2E + (ulong)(resourceClass * sizeof(ushort)),
+                    out resourceCounts[resourceClass]) ||
+                resourceCounts[resourceClass] > MaxMetadataEntries)
+            {
+                return false;
+            }
+        }
+
+        var directResources = new Dictionary<uint, uint>();
+        if (directResourceCount != 0)
+        {
+            if (directResourceOffsetsAddress == 0)
+            {
+                return false;
+            }
+
+            for (uint type = 0; type < directResourceCount; type++)
+            {
+                if (!TryReadUInt16(ctx, directResourceOffsetsAddress + type * sizeof(ushort), out var offset))
+                {
+                    return false;
+                }
+
+                if (offset != ushort.MaxValue)
+                {
+                    directResources[type] = offset;
+                }
+            }
+        }
+
+        var resources = new List<Gen5ShaderResourceMapping>();
+        for (var resourceClass = 0; resourceClass < ResourceClassCount; resourceClass++)
+        {
+            var count = resourceCounts[resourceClass];
+            if (count == 0)
+            {
+                continue;
+            }
+
+            if (resourceOffsets[resourceClass] == 0)
+            {
+                return false;
+            }
+
+            for (uint slot = 0; slot < count; slot++)
+            {
+                if (!TryReadUInt16(
+                        ctx,
+                        resourceOffsets[resourceClass] + slot * sizeof(ushort),
+                        out var sharp))
+                {
+                    return false;
+                }
+
+                var offset = (uint)(sharp & 0x7FFF);
+                if (offset == 0x7FFF)
+                {
+                    continue;
+                }
+
+                resources.Add(new Gen5ShaderResourceMapping(
+                    (Gen5ShaderResourceKind)resourceClass,
+                    slot,
+                    offset,
+                    (sharp & 0x8000) != 0));
+            }
+        }
+
+        metadata = new Gen5ShaderMetadata(
+            extendedUserDataSize,
+            shaderResourceTableSize,
+            directResources,
+            resources);
+        return true;
+    }
+
+    private static bool TryReadUInt16(CpuContext ctx, ulong address, out ushort value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(ushort)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt16LittleEndian(bytes);
+        return true;
+    }
+}

src/SharpEmu.Libs/Agc/SpirvFixedShaders.cs

@@ -0,0 +1,167 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+namespace SharpEmu.Libs.Agc;
+
+internal static class SpirvFixedShaders
+{
+    public static byte[] CreateFullscreenVertex(uint attributeCount)
+    {
+        var module = new SpirvModuleBuilder();
+        module.AddCapability(SpirvCapability.Shader);
+
+        var voidType = module.TypeVoid();
+        var boolType = module.TypeBool();
+        var uintType = module.TypeInt(32, signed: false);
+        var floatType = module.TypeFloat(32);
+        var vec4Type = module.TypeVector(floatType, 4);
+        var inputUintPointer = module.TypePointer(SpirvStorageClass.Input, uintType);
+        var outputVec4Pointer = module.TypePointer(SpirvStorageClass.Output, vec4Type);
+
+        var vertexIndex = module.AddGlobalVariable(inputUintPointer, SpirvStorageClass.Input);
+        module.AddName(vertexIndex, "vertexIndex");
+        module.AddDecoration(
+            vertexIndex,
+            SpirvDecoration.BuiltIn,
+            (uint)SpirvBuiltIn.VertexIndex);
+
+        var position = module.AddGlobalVariable(outputVec4Pointer, SpirvStorageClass.Output);
+        module.AddName(position, "position");
+        module.AddDecoration(position, SpirvDecoration.BuiltIn, (uint)SpirvBuiltIn.Position);
+
+        var attributes = new uint[attributeCount];
+        for (uint index = 0; index < attributeCount; index++)
+        {
+            attributes[index] =
+                module.AddGlobalVariable(outputVec4Pointer, SpirvStorageClass.Output);
+            module.AddName(attributes[index], $"attr{index}");
+            module.AddDecoration(attributes[index], SpirvDecoration.Location, index);
+            module.AddDecoration(attributes[index], SpirvDecoration.NoPerspective);
+        }
+
+        var functionType = module.TypeFunction(voidType);
+        var main = module.BeginFunction(voidType, functionType);
+        module.AddName(main, "main");
+        module.AddLabel();
+
+        var indexValue = module.AddInstruction(SpirvOp.Load, uintType, vertexIndex);
+        var one = module.Constant(uintType, 1);
+        var two = module.Constant(uintType, 2);
+        var shifted = module.AddInstruction(SpirvOp.ShiftLeftLogical, uintType, indexValue, one);
+        var xBits = module.AddInstruction(SpirvOp.BitwiseAnd, uintType, shifted, two);
+        var yBits = module.AddInstruction(SpirvOp.BitwiseAnd, uintType, indexValue, two);
+        var x = module.AddInstruction(SpirvOp.ConvertUToF, floatType, xBits);
+        var y = module.AddInstruction(SpirvOp.ConvertUToF, floatType, yBits);
+        var zero = module.ConstantFloat(floatType, 0f);
+        var oneFloat = module.ConstantFloat(floatType, 1f);
+        var twoFloat = module.ConstantFloat(floatType, 2f);
+        var xPosition = module.AddInstruction(SpirvOp.FMul, floatType, x, twoFloat);
+        xPosition = module.AddInstruction(SpirvOp.FSub, floatType, xPosition, oneFloat);
+        var yPosition = module.AddInstruction(SpirvOp.FMul, floatType, y, twoFloat);
+        yPosition = module.AddInstruction(SpirvOp.FSub, floatType, yPosition, oneFloat);
+        var positionValue = module.AddInstruction(
+            SpirvOp.CompositeConstruct,
+            vec4Type,
+            xPosition,
+            yPosition,
+            zero,
+            oneFloat);
+        module.AddStatement(SpirvOp.Store, position, positionValue);
+
+        var attributeValue = module.AddInstruction(
+            SpirvOp.CompositeConstruct,
+            vec4Type,
+            x,
+            y,
+            zero,
+            oneFloat);
+        foreach (var attribute in attributes)
+        {
+            module.AddStatement(SpirvOp.Store, attribute, attributeValue);
+        }
+
+        module.AddStatement(SpirvOp.Return);
+        module.EndFunction();
+
+        var interfaces = new uint[2 + attributes.Length];
+        interfaces[0] = vertexIndex;
+        interfaces[1] = position;
+        attributes.CopyTo(interfaces, 2);
+        module.AddEntryPoint(SpirvExecutionModel.Vertex, main, "main", interfaces);
+        _ = boolType;
+        return module.Build();
+    }
+
+    public static byte[] CreateCopyFragment()
+    {
+        var module = new SpirvModuleBuilder();
+        module.AddCapability(SpirvCapability.Shader);
+
+        var voidType = module.TypeVoid();
+        var floatType = module.TypeFloat(32);
+        var vec2Type = module.TypeVector(floatType, 2);
+        var vec4Type = module.TypeVector(floatType, 4);
+        var inputVec4Pointer = module.TypePointer(SpirvStorageClass.Input, vec4Type);
+        var outputVec4Pointer = module.TypePointer(SpirvStorageClass.Output, vec4Type);
+        var imageType = module.TypeImage(
+            floatType,
+            SpirvImageDim.Dim2D,
+            depth: false,
+            arrayed: false,
+            multisampled: false,
+            sampled: 1,
+            SpirvImageFormat.Unknown);
+        var sampledImageType = module.TypeSampledImage(imageType);
+        var sampledImagePointer =
+            module.TypePointer(SpirvStorageClass.UniformConstant, sampledImageType);
+
+        var attribute = module.AddGlobalVariable(inputVec4Pointer, SpirvStorageClass.Input);
+        module.AddName(attribute, "attr0");
+        module.AddDecoration(attribute, SpirvDecoration.Location, 0);
+
+        var texture = module.AddGlobalVariable(
+            sampledImagePointer,
+            SpirvStorageClass.UniformConstant);
+        module.AddName(texture, "tex0");
+        module.AddDecoration(texture, SpirvDecoration.DescriptorSet, 0);
+        module.AddDecoration(texture, SpirvDecoration.Binding, 1);
+
+        var output = module.AddGlobalVariable(outputVec4Pointer, SpirvStorageClass.Output);
+        module.AddName(output, "outColor");
+        module.AddDecoration(output, SpirvDecoration.Location, 0);
+
+        var functionType = module.TypeFunction(voidType);
+        var main = module.BeginFunction(voidType, functionType);
+        module.AddName(main, "main");
+        module.AddLabel();
+
+        var attributeValue = module.AddInstruction(SpirvOp.Load, vec4Type, attribute);
+        var coordinates = module.AddInstruction(
+            SpirvOp.VectorShuffle,
+            vec2Type,
+            attributeValue,
+            attributeValue,
+            0,
+            1);
+        var sampledImage = module.AddInstruction(SpirvOp.Load, sampledImageType, texture);
+        var lod = module.ConstantFloat(floatType, 0f);
+        var color = module.AddInstruction(
+            SpirvOp.ImageSampleExplicitLod,
+            vec4Type,
+            sampledImage,
+            coordinates,
+            2,
+            lod);
+        module.AddStatement(SpirvOp.Store, output, color);
+        module.AddStatement(SpirvOp.Return);
+        module.EndFunction();
+
+        module.AddEntryPoint(
+            SpirvExecutionModel.Fragment,
+            main,
+            "main",
+            [attribute, texture, output]);
+        module.AddExecutionMode(main, SpirvExecutionMode.OriginUpperLeft);
+        return module.Build();
+    }
+}

src/SharpEmu.Libs/Agc/SpirvModuleBuilder.cs

@@ -0,0 +1,885 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Buffers.Binary;
+using System.Text;
+
+namespace SharpEmu.Libs.Agc;
+
+internal enum SpirvOp : ushort
+{
+    Nop = 0,
+    Name = 5,
+    Extension = 10,
+    ExtInstImport = 11,
+    ExtInst = 12,
+    MemoryModel = 14,
+    EntryPoint = 15,
+    ExecutionMode = 16,
+    Capability = 17,
+    TypeVoid = 19,
+    TypeBool = 20,
+    TypeInt = 21,
+    TypeFloat = 22,
+    TypeVector = 23,
+    TypeImage = 25,
+    TypeSampler = 26,
+    TypeSampledImage = 27,
+    TypeArray = 28,
+    TypeRuntimeArray = 29,
+    TypeStruct = 30,
+    TypePointer = 32,
+    TypeFunction = 33,
+    ConstantTrue = 41,
+    ConstantFalse = 42,
+    Constant = 43,
+    ConstantComposite = 44,
+    ConstantNull = 46,
+    Function = 54,
+    FunctionParameter = 55,
+    FunctionEnd = 56,
+    FunctionCall = 57,
+    Variable = 59,
+    Load = 61,
+    Store = 62,
+    AccessChain = 65,
+    ArrayLength = 68,
+    Decorate = 71,
+    VectorExtractDynamic = 77,
+    VectorInsertDynamic = 78,
+    VectorShuffle = 79,
+    CompositeConstruct = 80,
+    CompositeExtract = 81,
+    CompositeInsert = 82,
+    CopyObject = 83,
+    SampledImage = 86,
+    ImageSampleImplicitLod = 87,
+    ImageSampleExplicitLod = 88,
+    ImageSampleDrefImplicitLod = 89,
+    ImageSampleDrefExplicitLod = 90,
+    ImageFetch = 95,
+    ImageGather = 96,
+    ImageDrefGather = 97,
+    ImageRead = 98,
+    ImageWrite = 99,
+    Image = 100,
+    ImageQuerySizeLod = 103,
+    ImageQuerySize = 104,
+    ImageQueryLod = 105,
+    ImageQueryLevels = 106,
+    ImageQuerySamples = 107,
+    ConvertFToU = 109,
+    ConvertFToS = 110,
+    ConvertSToF = 111,
+    ConvertUToF = 112,
+    UConvert = 113,
+    SConvert = 114,
+    FConvert = 115,
+    Bitcast = 124,
+    SNegate = 126,
+    FNegate = 127,
+    IAdd = 128,
+    FAdd = 129,
+    ISub = 130,
+    FSub = 131,
+    IMul = 132,
+    FMul = 133,
+    UDiv = 134,
+    SDiv = 135,
+    FDiv = 136,
+    UMod = 137,
+    SRem = 138,
+    SMod = 139,
+    FRem = 140,
+    FMod = 141,
+    IAddCarry = 149,
+    ISubBorrow = 150,
+    UMulExtended = 151,
+    SMulExtended = 152,
+    Any = 154,
+    All = 155,
+    IsNan = 156,
+    IsInf = 157,
+    LogicalEqual = 164,
+    LogicalNotEqual = 165,
+    LogicalOr = 166,
+    LogicalAnd = 167,
+    LogicalNot = 168,
+    Select = 169,
+    IEqual = 170,
+    INotEqual = 171,
+    UGreaterThan = 172,
+    SGreaterThan = 173,
+    UGreaterThanEqual = 174,
+    SGreaterThanEqual = 175,
+    ULessThan = 176,
+    SLessThan = 177,
+    ULessThanEqual = 178,
+    SLessThanEqual = 179,
+    FOrdEqual = 180,
+    FUnordEqual = 181,
+    FOrdNotEqual = 182,
+    FUnordNotEqual = 183,
+    FOrdLessThan = 184,
+    FUnordLessThan = 185,
+    FOrdGreaterThan = 186,
+    FUnordGreaterThan = 187,
+    FOrdLessThanEqual = 188,
+    FUnordLessThanEqual = 189,
+    FOrdGreaterThanEqual = 190,
+    FUnordGreaterThanEqual = 191,
+    ShiftRightLogical = 194,
+    ShiftRightArithmetic = 195,
+    ShiftLeftLogical = 196,
+    BitwiseOr = 197,
+    BitwiseXor = 198,
+    BitwiseAnd = 199,
+    Not = 200,
+    BitFieldInsert = 201,
+    BitFieldSExtract = 202,
+    BitFieldUExtract = 203,
+    BitReverse = 204,
+    BitCount = 205,
+    ControlBarrier = 224,
+    MemoryBarrier = 225,
+    AtomicIAdd = 234,
+    Phi = 245,
+    LoopMerge = 246,
+    SelectionMerge = 247,
+    Label = 248,
+    Branch = 249,
+    BranchConditional = 250,
+    Switch = 251,
+    Kill = 252,
+    Return = 253,
+    ReturnValue = 254,
+    Unreachable = 255,
+    GroupNonUniformElect = 333,
+    GroupNonUniformAll = 334,
+    GroupNonUniformAny = 335,
+    GroupNonUniformAllEqual = 336,
+    GroupNonUniformBroadcast = 337,
+    GroupNonUniformBroadcastFirst = 338,
+    GroupNonUniformBallot = 339,
+    GroupNonUniformShuffle = 345,
+    GroupNonUniformShuffleXor = 346,
+    GroupNonUniformShuffleUp = 347,
+    GroupNonUniformShuffleDown = 348,
+}
+
+internal enum SpirvCapability : uint
+{
+    Shader = 1,
+    Float16 = 9,
+    Float64 = 10,
+    Int64 = 11,
+    Int16 = 22,
+    ImageGatherExtended = 25,
+    StorageImageExtendedFormats = 49,
+    ImageQuery = 50,
+    StorageImageReadWithoutFormat = 55,
+    StorageImageWriteWithoutFormat = 56,
+    GroupNonUniform = 61,
+    GroupNonUniformVote = 62,
+    GroupNonUniformBallot = 64,
+    GroupNonUniformShuffle = 65,
+    RuntimeDescriptorArray = 5302,
+}
+
+internal enum SpirvStorageClass : uint
+{
+    UniformConstant = 0,
+    Input = 1,
+    Uniform = 2,
+    Output = 3,
+    Workgroup = 4,
+    Private = 6,
+    Function = 7,
+    PushConstant = 9,
+    Image = 11,
+    StorageBuffer = 12,
+}
+
+internal enum SpirvExecutionModel : uint
+{
+    Vertex = 0,
+    Fragment = 4,
+    GLCompute = 5,
+}
+
+internal enum SpirvExecutionMode : uint
+{
+    OriginUpperLeft = 7,
+    DepthReplacing = 12,
+    LocalSize = 17,
+}
+
+internal enum SpirvDecoration : uint
+{
+    Block = 2,
+    ArrayStride = 6,
+    BuiltIn = 11,
+    NoPerspective = 13,
+    Flat = 14,
+    Location = 30,
+    Binding = 33,
+    DescriptorSet = 34,
+    Offset = 35,
+}
+
+internal enum SpirvBuiltIn : uint
+{
+    Position = 0,
+    VertexIndex = 42,
+    InstanceIndex = 43,
+    FragCoord = 15,
+    FrontFacing = 17,
+    WorkgroupId = 26,
+    LocalInvocationId = 27,
+    GlobalInvocationId = 28,
+    LocalInvocationIndex = 29,
+    SubgroupLocalInvocationId = 41,
+}
+
+internal enum SpirvImageDim : uint
+{
+    Dim1D = 0,
+    Dim2D = 1,
+    Dim3D = 2,
+    Cube = 3,
+    Buffer = 5,
+}
+
+internal enum SpirvImageFormat : uint
+{
+    Unknown = 0,
+    Rgba32f = 1,
+    Rgba16f = 2,
+    R32f = 3,
+    Rgba8 = 4,
+    Rgba8Snorm = 5,
+    Rg32f = 6,
+    Rg16f = 7,
+    R11fG11fB10f = 8,
+    R16f = 9,
+    Rgba16 = 10,
+    Rgb10A2 = 11,
+    Rg16 = 12,
+    Rg8 = 13,
+    R16 = 14,
+    R8 = 15,
+    Rgba16Snorm = 16,
+    Rg16Snorm = 17,
+    Rg8Snorm = 18,
+    R16Snorm = 19,
+    R8Snorm = 20,
+    Rgba32i = 21,
+    Rgba16i = 22,
+    Rgba8i = 23,
+    R32i = 24,
+    Rg32i = 25,
+    Rg16i = 26,
+    Rg8i = 27,
+    R16i = 28,
+    R8i = 29,
+    Rgba32ui = 30,
+    Rgba16ui = 31,
+    Rgba8ui = 32,
+    R32ui = 33,
+    Rgb10A2ui = 34,
+    Rg32ui = 35,
+    Rg16ui = 36,
+    Rg8ui = 37,
+    R16ui = 38,
+    R8ui = 39,
+}
+
+internal sealed class SpirvModuleBuilder
+{
+    private const uint Magic = 0x07230203;
+    private const uint Version15 = 0x00010500;
+    private const uint Generator = 0x53504500; // "SPE"
+
+    private readonly List<uint> _capabilities = [];
+    private readonly List<uint> _extensions = [];
+    private readonly List<uint> _imports = [];
+    private readonly List<uint> _memoryModel = [];
+    private readonly List<uint> _entryPoints = [];
+    private readonly List<uint> _executionModes = [];
+    private readonly List<uint> _debug = [];
+    private readonly List<uint> _annotations = [];
+    private readonly List<uint> _typesConstantsGlobals = [];
+    private readonly List<uint> _functions = [];
+    private readonly Dictionary<(uint Width, bool Signed), uint> _integerTypes = [];
+    private readonly Dictionary<uint, uint> _floatTypes = [];
+    private readonly Dictionary<(uint Component, uint Count), uint> _vectorTypes = [];
+    private readonly Dictionary<
+        (
+            uint SampledType,
+            SpirvImageDim Dimension,
+            bool Depth,
+            bool Arrayed,
+            bool Multisampled,
+            uint Sampled,
+            SpirvImageFormat Format
+        ),
+        uint> _imageTypes = [];
+    private readonly Dictionary<uint, uint> _sampledImageTypes = [];
+    private readonly Dictionary<(SpirvStorageClass Storage, uint Type), uint> _pointerTypes = [];
+    private readonly Dictionary<(uint Element, uint Count), uint> _arrayTypes = [];
+    private readonly Dictionary<uint, uint> _runtimeArrayTypes = [];
+    private readonly Dictionary<string, uint> _functionTypes = [];
+    private readonly Dictionary<(uint Type, ulong Value), uint> _constants = [];
+    private readonly HashSet<SpirvCapability> _declaredCapabilities = [];
+    private readonly Dictionary<string, uint> _extInstImports = [];
+    private uint _nextId = 1;
+    private uint? _voidType;
+    private uint? _boolType;
+
+    public uint AllocateId() => _nextId++;
+
+    public void AddCapability(SpirvCapability capability)
+    {
+        if (_declaredCapabilities.Add(capability))
+        {
+            Emit(_capabilities, SpirvOp.Capability, (uint)capability);
+        }
+    }
+
+    public void AddExtension(string extension) =>
+        EmitWithString(_extensions, SpirvOp.Extension, [], extension);
+
+    public uint ImportExtInst(string name)
+    {
+        if (_extInstImports.TryGetValue(name, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        EmitWithString(_imports, SpirvOp.ExtInstImport, [id], name);
+        _extInstImports.Add(name, id);
+        return id;
+    }
+
+    public void SetLogicalGlsl450MemoryModel() =>
+        Emit(_memoryModel, SpirvOp.MemoryModel, 0, 1);
+
+    public void AddEntryPoint(
+        SpirvExecutionModel model,
+        uint function,
+        string name,
+        IReadOnlyList<uint> interfaces)
+    {
+        var prefix = new uint[2 + interfaces.Count];
+        prefix[0] = (uint)model;
+        prefix[1] = function;
+        for (var index = 0; index < interfaces.Count; index++)
+        {
+            prefix[index + 2] = interfaces[index];
+        }
+
+        EmitWithString(_entryPoints, SpirvOp.EntryPoint, prefix, name, stringBeforeTailCount: 2);
+    }
+
+    public void AddExecutionMode(uint function, SpirvExecutionMode mode, params uint[] operands)
+    {
+        var values = new uint[2 + operands.Length];
+        values[0] = function;
+        values[1] = (uint)mode;
+        operands.CopyTo(values, 2);
+        Emit(_executionModes, SpirvOp.ExecutionMode, values);
+    }
+
+    public void AddName(uint target, string name) =>
+        EmitWithString(_debug, SpirvOp.Name, [target], name);
+
+    public void AddDecoration(uint target, SpirvDecoration decoration, params uint[] operands)
+    {
+        var values = new uint[2 + operands.Length];
+        values[0] = target;
+        values[1] = (uint)decoration;
+        operands.CopyTo(values, 2);
+        Emit(_annotations, SpirvOp.Decorate, values);
+    }
+
+    public void AddMemberDecoration(
+        uint target,
+        uint member,
+        SpirvDecoration decoration,
+        params uint[] operands)
+    {
+        var values = new uint[3 + operands.Length];
+        values[0] = target;
+        values[1] = member;
+        values[2] = (uint)decoration;
+        operands.CopyTo(values, 3);
+        EmitRaw(_annotations, 72, values);
+    }
+
+    public uint TypeVoid()
+    {
+        if (_voidType is { } existing)
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeVoid, id);
+        _voidType = id;
+        return id;
+    }
+
+    public uint TypeBool()
+    {
+        if (_boolType is { } existing)
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeBool, id);
+        _boolType = id;
+        return id;
+    }
+
+    public uint TypeInt(uint width, bool signed)
+    {
+        var key = (width, signed);
+        if (_integerTypes.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeInt, id, width, signed ? 1u : 0u);
+        _integerTypes.Add(key, id);
+        return id;
+    }
+
+    public uint TypeFloat(uint width)
+    {
+        if (_floatTypes.TryGetValue(width, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeFloat, id, width);
+        _floatTypes.Add(width, id);
+        return id;
+    }
+
+    public uint TypeVector(uint componentType, uint count)
+    {
+        var key = (componentType, count);
+        if (_vectorTypes.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeVector, id, componentType, count);
+        _vectorTypes.Add(key, id);
+        return id;
+    }
+
+    public uint TypeImage(
+        uint sampledType,
+        SpirvImageDim dimension,
+        bool depth,
+        bool arrayed,
+        bool multisampled,
+        uint sampled,
+        SpirvImageFormat format)
+    {
+        var key = (
+            sampledType,
+            dimension,
+            depth,
+            arrayed,
+            multisampled,
+            sampled,
+            format);
+        if (_imageTypes.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(
+            _typesConstantsGlobals,
+            SpirvOp.TypeImage,
+            id,
+            sampledType,
+            (uint)dimension,
+            depth ? 1u : 0u,
+            arrayed ? 1u : 0u,
+            multisampled ? 1u : 0u,
+            sampled,
+            (uint)format);
+        _imageTypes.Add(key, id);
+        return id;
+    }
+
+    public uint TypeSampledImage(uint imageType)
+    {
+        if (_sampledImageTypes.TryGetValue(imageType, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeSampledImage, id, imageType);
+        _sampledImageTypes.Add(imageType, id);
+        return id;
+    }
+
+    public uint TypeArray(uint elementType, uint count)
+    {
+        var key = (elementType, count);
+        if (_arrayTypes.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var length = Constant(TypeInt(32, false), count);
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeArray, id, elementType, length);
+        _arrayTypes.Add(key, id);
+        return id;
+    }
+
+    public uint TypeRuntimeArray(uint elementType)
+    {
+        if (_runtimeArrayTypes.TryGetValue(elementType, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypeRuntimeArray, id, elementType);
+        _runtimeArrayTypes.Add(elementType, id);
+        return id;
+    }
+
+    public uint TypeStruct(params uint[] memberTypes)
+    {
+        var id = AllocateId();
+        var operands = new uint[memberTypes.Length + 1];
+        operands[0] = id;
+        memberTypes.CopyTo(operands, 1);
+        Emit(_typesConstantsGlobals, SpirvOp.TypeStruct, operands);
+        return id;
+    }
+
+    public uint TypePointer(SpirvStorageClass storageClass, uint type)
+    {
+        var key = (storageClass, type);
+        if (_pointerTypes.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.TypePointer, id, (uint)storageClass, type);
+        _pointerTypes.Add(key, id);
+        return id;
+    }
+
+    public uint TypeFunction(uint returnType, params uint[] parameterTypes)
+    {
+        var key = returnType + ":" + string.Join(',', parameterTypes);
+        if (_functionTypes.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        var operands = new uint[parameterTypes.Length + 2];
+        operands[0] = id;
+        operands[1] = returnType;
+        parameterTypes.CopyTo(operands, 2);
+        Emit(_typesConstantsGlobals, SpirvOp.TypeFunction, operands);
+        _functionTypes.Add(key, id);
+        return id;
+    }
+
+    public uint ConstantBool(bool value)
+    {
+        var type = TypeBool();
+        var key = (type, value ? 1UL : 0UL);
+        if (_constants.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(
+            _typesConstantsGlobals,
+            value ? SpirvOp.ConstantTrue : SpirvOp.ConstantFalse,
+            type,
+            id);
+        _constants.Add(key, id);
+        return id;
+    }
+
+    public uint Constant(uint type, uint value)
+    {
+        var key = (type, (ulong)value);
+        if (_constants.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.Constant, type, id, value);
+        _constants.Add(key, id);
+        return id;
+    }
+
+    public uint Constant64(uint type, ulong value)
+    {
+        var key = (type, value);
+        if (_constants.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(
+            _typesConstantsGlobals,
+            SpirvOp.Constant,
+            type,
+            id,
+            (uint)value,
+            (uint)(value >> 32));
+        _constants.Add(key, id);
+        return id;
+    }
+
+    public uint ConstantFloat(uint type, float value) =>
+        Constant(type, BitConverter.SingleToUInt32Bits(value));
+
+    public uint ConstantComposite(uint type, params uint[] constituents)
+    {
+        var id = AllocateId();
+        var operands = new uint[constituents.Length + 2];
+        operands[0] = type;
+        operands[1] = id;
+        constituents.CopyTo(operands, 2);
+        Emit(_typesConstantsGlobals, SpirvOp.ConstantComposite, operands);
+        return id;
+    }
+
+    public uint ConstantNull(uint type)
+    {
+        var key = (type, ulong.MaxValue);
+        if (_constants.TryGetValue(key, out var existing))
+        {
+            return existing;
+        }
+
+        var id = AllocateId();
+        Emit(_typesConstantsGlobals, SpirvOp.ConstantNull, type, id);
+        _constants.Add(key, id);
+        return id;
+    }
+
+    public uint AddGlobalVariable(
+        uint pointerType,
+        SpirvStorageClass storageClass,
+        uint? initializer = null)
+    {
+        var id = AllocateId();
+        if (initializer.HasValue)
+        {
+            Emit(
+                _typesConstantsGlobals,
+                SpirvOp.Variable,
+                pointerType,
+                id,
+                (uint)storageClass,
+                initializer.Value);
+        }
+        else
+        {
+            Emit(_typesConstantsGlobals, SpirvOp.Variable, pointerType, id, (uint)storageClass);
+        }
+
+        return id;
+    }
+
+    public uint BeginFunction(uint returnType, uint functionType)
+    {
+        var id = AllocateId();
+        Emit(_functions, SpirvOp.Function, returnType, id, 0, functionType);
+        return id;
+    }
+
+    public uint AddFunctionParameter(uint type) =>
+        EmitResult(_functions, SpirvOp.FunctionParameter, type);
+
+    public uint AddLabel(uint? id = null)
+    {
+        var result = id ?? AllocateId();
+        Emit(_functions, SpirvOp.Label, result);
+        return result;
+    }
+
+    public uint AddFunctionVariable(uint pointerType, uint? initializer = null)
+    {
+        var id = AllocateId();
+        if (initializer.HasValue)
+        {
+            Emit(
+                _functions,
+                SpirvOp.Variable,
+                pointerType,
+                id,
+                (uint)SpirvStorageClass.Function,
+                initializer.Value);
+        }
+        else
+        {
+            Emit(
+                _functions,
+                SpirvOp.Variable,
+                pointerType,
+                id,
+                (uint)SpirvStorageClass.Function);
+        }
+
+        return id;
+    }
+
+    public uint AddInstruction(SpirvOp opcode, uint resultType, params uint[] operands) =>
+        EmitResult(_functions, opcode, resultType, operands);
+
+    public void AddStatement(SpirvOp opcode, params uint[] operands) =>
+        Emit(_functions, opcode, operands);
+
+    public void EndFunction() => Emit(_functions, SpirvOp.FunctionEnd);
+
+    public byte[] Build()
+    {
+        if (_memoryModel.Count == 0)
+        {
+            SetLogicalGlsl450MemoryModel();
+        }
+
+        var wordCount =
+            5 +
+            _capabilities.Count +
+            _extensions.Count +
+            _imports.Count +
+            _memoryModel.Count +
+            _entryPoints.Count +
+            _executionModes.Count +
+            _debug.Count +
+            _annotations.Count +
+            _typesConstantsGlobals.Count +
+            _functions.Count;
+        var words = new uint[wordCount];
+        var offset = 0;
+        WriteWord(Magic);
+        WriteWord(Version15);
+        WriteWord(Generator);
+        WriteWord(_nextId);
+        WriteWord(0);
+        WriteSection(_capabilities);
+        WriteSection(_extensions);
+        WriteSection(_imports);
+        WriteSection(_memoryModel);
+        WriteSection(_entryPoints);
+        WriteSection(_executionModes);
+        WriteSection(_debug);
+        WriteSection(_annotations);
+        WriteSection(_typesConstantsGlobals);
+        WriteSection(_functions);
+        var bytes = new byte[wordCount * sizeof(uint)];
+        Buffer.BlockCopy(words, 0, bytes, 0, bytes.Length);
+        return bytes;
+
+        void WriteWord(uint value)
+        {
+            words[offset++] = value;
+        }
+
+        void WriteSection(List<uint> section)
+        {
+            foreach (var value in section)
+            {
+                WriteWord(value);
+            }
+        }
+    }
+
+    private uint EmitResult(
+        List<uint> section,
+        SpirvOp opcode,
+        uint resultType,
+        params uint[] operands)
+    {
+        var result = AllocateId();
+        var values = new uint[operands.Length + 2];
+        values[0] = resultType;
+        values[1] = result;
+        operands.CopyTo(values, 2);
+        Emit(section, opcode, values);
+        return result;
+    }
+
+    private static void Emit(List<uint> section, SpirvOp opcode, params uint[] operands) =>
+        EmitRaw(section, (ushort)opcode, operands);
+
+    private static void EmitRaw(List<uint> section, ushort opcode, params uint[] operands)
+    {
+        section.Add(((uint)(operands.Length + 1) << 16) | opcode);
+        section.AddRange(operands);
+    }
+
+    private static void EmitWithString(
+        List<uint> section,
+        SpirvOp opcode,
+        IReadOnlyList<uint> prefix,
+        string value,
+        int stringBeforeTailCount = -1)
+    {
+        var encoded = EncodeString(value);
+        if (stringBeforeTailCount < 0)
+        {
+            var operands = new uint[prefix.Count + encoded.Length];
+            for (var index = 0; index < prefix.Count; index++)
+            {
+                operands[index] = prefix[index];
+            }
+
+            encoded.CopyTo(operands, prefix.Count);
+            Emit(section, opcode, operands);
+            return;
+        }
+
+        var result = new uint[prefix.Count + encoded.Length];
+        for (var index = 0; index < stringBeforeTailCount; index++)
+        {
+            result[index] = prefix[index];
+        }
+
+        encoded.CopyTo(result, stringBeforeTailCount);
+        for (var index = stringBeforeTailCount; index < prefix.Count; index++)
+        {
+            result[index + encoded.Length] = prefix[index];
+        }
+
+        Emit(section, opcode, result);
+    }
+
+    private static uint[] EncodeString(string value)
+    {
+        var byteCount = Encoding.UTF8.GetByteCount(value) + 1;
+        var words = new uint[(byteCount + 3) / 4];
+        Encoding.UTF8.GetBytes(value, System.Runtime.InteropServices.MemoryMarshal.AsBytes(words.AsSpan()));
+        return words;
+    }
+}

src/SharpEmu.Libs/Ampr/AmprExports.cs

@@ -0,0 +1,920 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using SharpEmu.Libs.Kernel;
+using System.Buffers;
+using System.Buffers.Binary;
+using System.Collections.Concurrent;
+
+namespace SharpEmu.Libs.Ampr;
+
+public static class AmprExports
+{
+    private const int CommandBufferHeaderSize = 0x28;
+    private const ulong CommandBufferSelfOffset = 0x00;
+    private const ulong CommandBufferDataOffset = 0x08;
+    private const ulong CommandBufferSizeOffset = 0x10;
+    private const ulong CommandBufferAux0Offset = 0x18;
+    private const ulong CommandBufferAux1Offset = 0x20;
+    private const ulong ReadFileRecordSize = 0x30;
+    private const ulong KernelEventQueueRecordSize = 0x30;
+    private const ulong WriteAddressRecordSize = 0x20;
+    private const uint ReadFileRecordType = 1;
+    private const uint KernelEventQueueRecordType = 2;
+    private const uint WriteAddressRecordType = 3;
+    private static readonly ConcurrentDictionary<ulong, CommandBufferState> _commandBuffers = new();
+    private static readonly ConcurrentDictionary<string, Lazy<CachedHostFile>> _hostFileCache = new(StringComparer.OrdinalIgnoreCase);
+    private static readonly bool _traceAmpr =
+        string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR"), "1", StringComparison.Ordinal);
+    private static readonly bool _traceAmprReads =
+        _traceAmpr ||
+        string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR_READS"), "1", StringComparison.Ordinal);
+
+    private sealed class CommandBufferState
+    {
+        public ulong Buffer;
+        public ulong Size;
+        public ulong WriteOffset;
+    }
+
+    private sealed class CachedHostFile
+    {
+        public CachedHostFile(string path)
+        {
+            Stream = new FileStream(
+                path,
+                FileMode.Open,
+                FileAccess.Read,
+                FileShare.ReadWrite | FileShare.Delete,
+                bufferSize: 1024 * 1024,
+                FileOptions.RandomAccess);
+        }
+
+        public object Gate { get; } = new();
+        public FileStream Stream { get; }
+    }
+
+    [SysAbiExport(
+        Nid = "8aI7R7WaOlc",
+        ExportName = "sceAmprCommandBufferConstructor",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferConstructor(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var buffer = ctx[CpuRegister.Rsi];
+        var size = ctx[CpuRegister.Rdx];
+
+        if (commandBuffer == 0)
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (!InitializeCommandBuffer(ctx, commandBuffer, buffer, size, aux0: 0, aux1: 0, clear: true))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "ctor", commandBuffer, buffer, size);
+        ctx[CpuRegister.Rax] = commandBuffer;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "a8uLzYY--tM",
+        ExportName = "sceAmprAprCommandBufferConstructor",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int AprCommandBufferConstructor(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var aux0 = ctx[CpuRegister.Rsi];
+        var aux1 = ctx[CpuRegister.Rdx];
+
+        if (commandBuffer == 0)
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (!InitializeCommandBuffer(ctx, commandBuffer, buffer: 0, size: 0, aux0, aux1, clear: false))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "apr_ctor", commandBuffer, aux0, aux1);
+        ctx[CpuRegister.Rax] = commandBuffer;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "Qs1xtplKo0U",
+        ExportName = "sceAmprAprCommandBufferDestructor",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int AprCommandBufferDestructor(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        if (commandBuffer == 0)
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        Span<byte> auxiliaryPointers = stackalloc byte[sizeof(ulong) * 2];
+        auxiliaryPointers.Clear();
+        if (!ctx.Memory.TryWrite(commandBuffer + CommandBufferAux0Offset, auxiliaryPointers))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "apr_dtor", commandBuffer, 0, 0);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "GuchCTefuZw",
+        ExportName = "sceAmprCommandBufferDestructor",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferDestructor(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        if (commandBuffer == 0)
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (!WriteVisibleCommandBufferPointers(ctx, commandBuffer, buffer: 0, size: 0))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        _commandBuffers.TryRemove(commandBuffer, out _);
+        TraceAmpr(ctx, "dtor", commandBuffer, 0, 0);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "N-FSPA4S3nI",
+        ExportName = "sceAmprCommandBufferSetBuffer",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferSetBuffer(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var buffer = ctx[CpuRegister.Rsi];
+        var size = ctx[CpuRegister.Rdx];
+
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!WriteCommandBufferPointers(ctx, commandBuffer, buffer, size))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "set_buffer", commandBuffer, buffer, size);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "baQO9ez2gL4",
+        ExportName = "sceAmprCommandBufferReset",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferReset(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        Span<byte> bufferPointers = stackalloc byte[sizeof(ulong) * 2];
+        if (!ctx.Memory.TryRead(commandBuffer + CommandBufferDataOffset, bufferPointers))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        var buffer = BinaryPrimitives.ReadUInt64LittleEndian(bufferPointers);
+        var size = BinaryPrimitives.ReadUInt64LittleEndian(bufferPointers[sizeof(ulong)..]);
+        if (
+            !WriteCommandBufferPointers(ctx, commandBuffer, buffer, size, writeOffset: 0))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "reset", commandBuffer, buffer, size);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "ULvXMDz56po",
+        ExportName = "sceAmprCommandBufferClearBuffer",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferClearBuffer(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        if (commandBuffer == 0)
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!TryGetCommandBufferState(ctx, commandBuffer, out var buffer, out var size, out _) ||
+            !WriteVisibleCommandBufferPointers(ctx, commandBuffer, buffer: 0, size: 0))
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        _commandBuffers.TryRemove(commandBuffer, out _);
+        TraceAmpr(ctx, "clear_buffer", commandBuffer, buffer, size);
+        ctx[CpuRegister.Rax] = buffer;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "mQ16-QdKv7k",
+        ExportName = "sceAmprAprCommandBufferReadFile",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int AprCommandBufferReadFile(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var fileId = unchecked((uint)ctx[CpuRegister.Rcx]);
+        var destination = ctx[CpuRegister.R8];
+        var size = ctx[CpuRegister.R9];
+
+        if (commandBuffer == 0 || (destination == 0 && size != 0))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!ctx.TryReadUInt64(ctx[CpuRegister.Rsp] + sizeof(ulong), out var fileOffset))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (!AmprFileRegistry.TryGetHostPath(fileId, out var hostPath))
+        {
+            TraceAmprRead(ctx, commandBuffer, fileId, destination, size, fileOffset, bytesRead: 0, hostPath, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        }
+
+        var result = TryReadFileToGuestMemory(ctx, hostPath, fileOffset, destination, size, out var bytesRead);
+        if (result != (int)OrbisGen2Result.ORBIS_GEN2_OK)
+        {
+            TraceAmprRead(ctx, commandBuffer, fileId, destination, size, fileOffset, bytesRead, hostPath, result);
+            return result;
+        }
+
+        if (!AppendReadFileRecord(ctx, commandBuffer, fileId, destination, size, fileOffset, bytesRead))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmprRead(ctx, commandBuffer, fileId, destination, size, fileOffset, bytesRead, hostPath, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "vWU-odnS+fU",
+        ExportName = "sceAmprMeasureCommandSizeReadFile",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int MeasureCommandSizeReadFile(CpuContext ctx)
+    {
+        TraceAmpr(ctx, "measure_read_file", 0, ReadFileRecordSize, 0);
+        ctx[CpuRegister.Rax] = ReadFileRecordSize;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "sSAUCCU1dv4",
+        ExportName = "sceAmprMeasureCommandSizeWriteKernelEventQueue_04_00",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int MeasureCommandSizeWriteKernelEventQueue0400(CpuContext ctx)
+    {
+        TraceAmpr(ctx, "measure_write_equeue", 0, KernelEventQueueRecordSize, 0);
+        ctx[CpuRegister.Rax] = KernelEventQueueRecordSize;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "C+IEj+BsAFM",
+        ExportName = "sceAmprMeasureCommandSizeWriteAddressOnCompletion",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int MeasureCommandSizeWriteAddressOnCompletion(CpuContext ctx)
+    {
+        TraceAmpr(ctx, "measure_write_address_complete", 0, WriteAddressRecordSize, 0);
+        ctx[CpuRegister.Rax] = WriteAddressRecordSize;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "tZDDEo2tE5k",
+        ExportName = "sceAmprCommandBufferGetSize",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferGetSize(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!TryGetCommandBufferState(ctx, commandBuffer, out _, out var size, out _))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "get_size", commandBuffer, size, 0);
+        ctx[CpuRegister.Rax] = size;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "GnxKOHEawhk",
+        ExportName = "sceAmprCommandBufferGetCurrentOffset",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferGetCurrentOffset(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!TryGetCommandBufferOffset(ctx, commandBuffer, out var offset))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "get_offset", commandBuffer, offset, 0);
+        ctx[CpuRegister.Rax] = offset;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "H896Pt-yB4I",
+        ExportName = "sceAmprCommandBufferWriteKernelEventQueue_04_00",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferWriteKernelEventQueue0400(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var equeue = ctx[CpuRegister.Rsi];
+        var ident = ctx[CpuRegister.Rdx];
+        var completionToken = ctx[CpuRegister.Rcx];
+        var userData = ctx[CpuRegister.R8];
+
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!AppendKernelEventQueueRecord(
+                ctx,
+                commandBuffer,
+                equeue,
+                ident,
+                completionToken,
+                userData))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "write_equeue", commandBuffer, ident, completionToken);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "sJXyWHjP-F8",
+        ExportName = "sceAmprCommandBufferWriteAddressOnCompletion",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAmpr")]
+    public static int CommandBufferWriteAddressOnCompletion(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var address = ctx[CpuRegister.Rsi];
+        var value = ctx[CpuRegister.Rdx];
+
+        if (commandBuffer == 0 || address == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!AppendWriteAddressRecord(ctx, commandBuffer, address, value))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceAmpr(ctx, "write_address_complete", commandBuffer, address, value);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    public static int CompleteCommandBuffer(CpuContext ctx, ulong commandBuffer)
+    {
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!TryGetCommandBufferState(ctx, commandBuffer, out var buffer, out _, out var state) || state is null)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ulong writeOffset;
+        lock (state)
+        {
+            writeOffset = state.WriteOffset;
+        }
+
+        var offset = 0UL;
+        while (offset < writeOffset)
+        {
+            if (!ctx.TryReadUInt32(buffer + offset, out var recordType))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+
+            switch (recordType)
+            {
+                case ReadFileRecordType:
+                    offset += ReadFileRecordSize;
+                    break;
+
+                case KernelEventQueueRecordType:
+                    if (!CompleteKernelEventQueueRecord(ctx, buffer + offset))
+                    {
+                        return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+                    }
+
+                    offset += KernelEventQueueRecordSize;
+                    break;
+
+                case WriteAddressRecordType:
+                    if (!CompleteWriteAddressRecord(ctx, buffer + offset))
+                    {
+                        return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+                    }
+
+                    offset += WriteAddressRecordSize;
+                    break;
+
+                default:
+                    TraceAmpr(ctx, "complete_unknown", commandBuffer, recordType, offset);
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+            }
+        }
+
+        TraceAmpr(ctx, "complete", commandBuffer, buffer, writeOffset);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static bool InitializeCommandBuffer(
+        CpuContext ctx,
+        ulong commandBuffer,
+        ulong buffer,
+        ulong size,
+        ulong aux0,
+        ulong aux1,
+        bool clear)
+    {
+        Span<byte> header = stackalloc byte[CommandBufferHeaderSize];
+        if (clear)
+        {
+            header.Clear();
+        }
+        else
+        {
+            if (!ctx.Memory.TryRead(commandBuffer, header))
+            {
+                return false;
+            }
+
+            buffer = BinaryPrimitives.ReadUInt64LittleEndian(header[(int)CommandBufferDataOffset..]);
+            size = BinaryPrimitives.ReadUInt64LittleEndian(header[(int)CommandBufferSizeOffset..]);
+        }
+
+        BinaryPrimitives.WriteUInt64LittleEndian(header[(int)CommandBufferSelfOffset..], commandBuffer);
+        BinaryPrimitives.WriteUInt64LittleEndian(header[(int)CommandBufferDataOffset..], buffer);
+        BinaryPrimitives.WriteUInt64LittleEndian(header[(int)CommandBufferSizeOffset..], size);
+        BinaryPrimitives.WriteUInt64LittleEndian(header[(int)CommandBufferAux0Offset..], aux0);
+        BinaryPrimitives.WriteUInt64LittleEndian(header[(int)CommandBufferAux1Offset..], aux1);
+        if (!ctx.Memory.TryWrite(commandBuffer, header))
+        {
+            return false;
+        }
+
+        UpdateCommandBufferState(commandBuffer, buffer, size, writeOffset: 0);
+        return true;
+    }
+
+    private static bool WriteCommandBufferPointers(CpuContext ctx, ulong commandBuffer, ulong buffer, ulong size)
+    {
+        return WriteCommandBufferPointers(ctx, commandBuffer, buffer, size, writeOffset: 0);
+    }
+
+    private static bool WriteCommandBufferPointers(CpuContext ctx, ulong commandBuffer, ulong buffer, ulong size, ulong writeOffset)
+    {
+        if (!WriteVisibleCommandBufferPointers(ctx, commandBuffer, buffer, size))
+        {
+            return false;
+        }
+
+        UpdateCommandBufferState(commandBuffer, buffer, size, writeOffset);
+
+        return true;
+    }
+
+    private static bool WriteVisibleCommandBufferPointers(CpuContext ctx, ulong commandBuffer, ulong buffer, ulong size)
+    {
+        Span<byte> pointers = stackalloc byte[sizeof(ulong) * 3];
+        BinaryPrimitives.WriteUInt64LittleEndian(pointers, commandBuffer);
+        BinaryPrimitives.WriteUInt64LittleEndian(pointers[sizeof(ulong)..], buffer);
+        BinaryPrimitives.WriteUInt64LittleEndian(pointers[(sizeof(ulong) * 2)..], size);
+        return ctx.Memory.TryWrite(commandBuffer + CommandBufferSelfOffset, pointers);
+    }
+
+    private static void UpdateCommandBufferState(
+        ulong commandBuffer,
+        ulong buffer,
+        ulong size,
+        ulong writeOffset)
+    {
+        var state = _commandBuffers.GetOrAdd(commandBuffer, static _ => new CommandBufferState());
+        lock (state)
+        {
+            state.Buffer = buffer;
+            state.Size = size;
+            state.WriteOffset = writeOffset;
+        }
+    }
+
+    private static bool TryGetCommandBufferState(
+        CpuContext ctx,
+        ulong commandBuffer,
+        out ulong buffer,
+        out ulong size,
+        out CommandBufferState? state)
+    {
+        if (_commandBuffers.TryGetValue(commandBuffer, out state))
+        {
+            lock (state)
+            {
+                buffer = state.Buffer;
+                size = state.Size;
+            }
+
+            return true;
+        }
+
+        Span<byte> pointers = stackalloc byte[sizeof(ulong) * 2];
+        if (ctx.Memory.TryRead(commandBuffer + CommandBufferDataOffset, pointers))
+        {
+            buffer = BinaryPrimitives.ReadUInt64LittleEndian(pointers);
+            size = BinaryPrimitives.ReadUInt64LittleEndian(pointers[sizeof(ulong)..]);
+            state = _commandBuffers.GetOrAdd(commandBuffer, static _ => new CommandBufferState());
+            lock (state)
+            {
+                state.Buffer = buffer;
+                state.Size = size;
+                state.WriteOffset = 0;
+            }
+
+            return true;
+        }
+
+        buffer = 0;
+        size = 0;
+        state = null;
+        return false;
+    }
+
+    private static bool TryGetCommandBufferOffset(CpuContext ctx, ulong commandBuffer, out ulong offset)
+    {
+        if (!TryGetCommandBufferState(ctx, commandBuffer, out _, out _, out var state) || state is null)
+        {
+            offset = 0;
+            return false;
+        }
+
+        lock (state)
+        {
+            offset = state.WriteOffset;
+        }
+
+        return true;
+    }
+
+    private static int TryReadFileToGuestMemory(
+        CpuContext ctx,
+        string hostPath,
+        ulong fileOffset,
+        ulong destination,
+        ulong size,
+        out ulong bytesRead)
+    {
+        bytesRead = 0;
+        if (size == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (fileOffset > long.MaxValue)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        const int ChunkSize = 1024 * 1024;
+        var buffer = ArrayPool<byte>.Shared.Rent((int)Math.Min((ulong)ChunkSize, size));
+
+        try
+        {
+            if (!TryGetCachedHostFile(hostPath, out var cachedFile, out var openResult))
+            {
+                return openResult;
+            }
+
+            long fileLength;
+            lock (cachedFile.Gate)
+            {
+                fileLength = cachedFile.Stream.Length;
+            }
+
+            if (fileOffset >= (ulong)fileLength)
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+            }
+
+            while (bytesRead < size)
+            {
+                if (bytesRead > ulong.MaxValue - fileOffset)
+                {
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+                }
+
+                var absoluteOffset = fileOffset + bytesRead;
+                if (absoluteOffset > long.MaxValue)
+                {
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+                }
+
+                var request = (int)Math.Min((ulong)buffer.Length, size - bytesRead);
+                int read;
+                lock (cachedFile.Gate)
+                {
+                    cachedFile.Stream.Position = unchecked((long)absoluteOffset);
+                    read = cachedFile.Stream.Read(buffer, 0, request);
+                }
+
+                if (read <= 0)
+                {
+                    break;
+                }
+
+                if (!ctx.Memory.TryWrite(destination + bytesRead, buffer.AsSpan(0, read)))
+                {
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+                }
+
+                bytesRead += (ulong)read;
+            }
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_PERMISSION_DENIED;
+        }
+        catch (IOException)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        }
+        finally
+        {
+            ArrayPool<byte>.Shared.Return(buffer);
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static bool TryGetCachedHostFile(string hostPath, out CachedHostFile file, out int result)
+    {
+        file = null!;
+        result = (int)OrbisGen2Result.ORBIS_GEN2_OK;
+
+        string cachePath;
+        try
+        {
+            cachePath = Path.GetFullPath(hostPath);
+        }
+        catch
+        {
+            cachePath = hostPath;
+        }
+
+        var lazy = _hostFileCache.GetOrAdd(
+            cachePath,
+            static path => new Lazy<CachedHostFile>(() => new CachedHostFile(path), isThreadSafe: true));
+
+        try
+        {
+            file = lazy.Value;
+            return true;
+        }
+        catch (UnauthorizedAccessException)
+        {
+            _hostFileCache.TryRemove(cachePath, out _);
+            result = (int)OrbisGen2Result.ORBIS_GEN2_ERROR_PERMISSION_DENIED;
+            return false;
+        }
+        catch (IOException)
+        {
+            _hostFileCache.TryRemove(cachePath, out _);
+            result = (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            return false;
+        }
+    }
+
+    private static bool AppendReadFileRecord(
+        CpuContext ctx,
+        ulong commandBuffer,
+        uint fileId,
+        ulong destination,
+        ulong size,
+        ulong fileOffset,
+        ulong bytesRead)
+    {
+        Span<byte> record = stackalloc byte[(int)ReadFileRecordSize];
+        record.Clear();
+        BinaryPrimitives.WriteUInt32LittleEndian(record[0x00..], ReadFileRecordType);
+        BinaryPrimitives.WriteUInt32LittleEndian(record[0x04..], fileId);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x08..], destination);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x10..], size);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x18..], fileOffset);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x20..], bytesRead);
+
+        return AppendCommandBufferRecord(ctx, commandBuffer, record);
+    }
+
+    private static bool AppendKernelEventQueueRecord(
+        CpuContext ctx,
+        ulong commandBuffer,
+        ulong equeue,
+        ulong ident,
+        ulong completionToken,
+        ulong userData)
+    {
+        Span<byte> record = stackalloc byte[(int)KernelEventQueueRecordSize];
+        record.Clear();
+        BinaryPrimitives.WriteUInt32LittleEndian(record[0x00..], KernelEventQueueRecordType);
+        BinaryPrimitives.WriteInt16LittleEndian(record[0x04..], KernelEventQueueCompatExports.KernelEventFilterAmpr);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x08..], equeue);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x10..], ident);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x18..], userData);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x20..], completionToken);
+
+        return AppendCommandBufferRecord(ctx, commandBuffer, record);
+    }
+
+    private static bool AppendWriteAddressRecord(CpuContext ctx, ulong commandBuffer, ulong address, ulong value)
+    {
+        Span<byte> record = stackalloc byte[(int)WriteAddressRecordSize];
+        record.Clear();
+        BinaryPrimitives.WriteUInt32LittleEndian(record[0x00..], WriteAddressRecordType);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x08..], address);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x10..], value);
+
+        return AppendCommandBufferRecord(ctx, commandBuffer, record);
+    }
+
+    private static bool AppendCommandBufferRecord(CpuContext ctx, ulong commandBuffer, ReadOnlySpan<byte> record)
+    {
+        if (!TryGetCommandBufferState(ctx, commandBuffer, out _, out _, out var state) || state is null)
+        {
+            return false;
+        }
+
+        var recordSize = (ulong)record.Length;
+        lock (state)
+        {
+            if (state.Buffer == 0 ||
+                state.WriteOffset > state.Size ||
+                recordSize > state.Size - state.WriteOffset)
+            {
+                return false;
+            }
+
+            if (!ctx.Memory.TryWrite(state.Buffer + state.WriteOffset, record))
+            {
+                return false;
+            }
+
+            state.WriteOffset += recordSize;
+        }
+
+        return true;
+    }
+
+    private static bool CompleteKernelEventQueueRecord(CpuContext ctx, ulong recordAddress)
+    {
+        Span<byte> record = stackalloc byte[(int)KernelEventQueueRecordSize];
+        if (!ctx.Memory.TryRead(recordAddress, record))
+        {
+            return false;
+        }
+
+        var filter = unchecked((short)BinaryPrimitives.ReadUInt32LittleEndian(record[0x04..]));
+        var equeue = BinaryPrimitives.ReadUInt64LittleEndian(record[0x08..]);
+        var ident = BinaryPrimitives.ReadUInt64LittleEndian(record[0x10..]);
+        var userData = BinaryPrimitives.ReadUInt64LittleEndian(record[0x18..]);
+        var data = BinaryPrimitives.ReadUInt64LittleEndian(record[0x20..]);
+        var extra = BinaryPrimitives.ReadUInt64LittleEndian(record[0x28..]);
+
+        var queuedEvent = new KernelEventQueueCompatExports.KernelQueuedEvent(
+            ident,
+            filter,
+            0x20,
+            unchecked((uint)extra),
+            data,
+            userData);
+
+        _ = KernelEventQueueCompatExports.EnqueueEvent(equeue, queuedEvent);
+        TraceAmpr(ctx, "complete_equeue", equeue, ident, data);
+        return true;
+    }
+
+    private static bool CompleteWriteAddressRecord(CpuContext ctx, ulong recordAddress)
+    {
+        Span<byte> record = stackalloc byte[(int)WriteAddressRecordSize];
+        if (!ctx.Memory.TryRead(recordAddress, record))
+        {
+            return false;
+        }
+
+        var address = BinaryPrimitives.ReadUInt64LittleEndian(record[0x08..]);
+        var value = BinaryPrimitives.ReadUInt64LittleEndian(record[0x10..]);
+        if (!ctx.TryWriteUInt64(address, value))
+        {
+            return false;
+        }
+
+        TraceAmpr(ctx, "complete_write_address", address, value, 0);
+        return true;
+    }
+
+    private static void TraceAmpr(CpuContext ctx, string operation, ulong commandBuffer, ulong arg0, ulong arg1)
+    {
+        if (!_traceAmpr)
+        {
+            return;
+        }
+
+        var returnRip = 0UL;
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out returnRip);
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] ampr.{operation}: cmd=0x{commandBuffer:X16} arg0=0x{arg0:X16} arg1=0x{arg1:X16} ret=0x{returnRip:X16}");
+    }
+
+    private static void TraceAmprRead(
+        CpuContext ctx,
+        ulong commandBuffer,
+        uint fileId,
+        ulong destination,
+        ulong size,
+        ulong fileOffset,
+        ulong bytesRead,
+        string? hostPath,
+        int result)
+    {
+        if (!_traceAmprReads)
+        {
+            return;
+        }
+
+        var returnRip = 0UL;
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out returnRip);
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] ampr.read_file: cmd=0x{commandBuffer:X16} id=0x{fileId:X8} dst=0x{destination:X16} size=0x{size:X16} offset=0x{fileOffset:X16} read=0x{bytesRead:X16} result=0x{result:X8} path='{hostPath ?? string.Empty}' ret=0x{returnRip:X16}");
+    }
+}

src/SharpEmu.Libs/Ampr/AmprFileRegistry.cs

@@ -0,0 +1,40 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Collections.Concurrent;
+
+namespace SharpEmu.Libs.Ampr;
+
+internal static class AmprFileRegistry
+{
+    private static readonly ConcurrentDictionary<uint, string> _hostPathsById = new();
+
+    public static uint Register(string guestPath, string hostPath)
+    {
+        var id = ComputeFileId(guestPath);
+        _hostPathsById[id] = hostPath;
+        return id;
+    }
+
+    public static bool TryGetHostPath(uint id, out string hostPath)
+    {
+        return _hostPathsById.TryGetValue(id, out hostPath!);
+    }
+
+    private static uint ComputeFileId(string guestPath)
+    {
+        var bytes = System.Text.Encoding.UTF8.GetBytes(guestPath);
+
+        const uint offsetBasis = 2166136261;
+        const uint prime = 16777619;
+
+        var hash = offsetBasis;
+        foreach (var b in bytes)
+        {
+            hash ^= b;
+            hash *= prime;
+        }
+
+        return hash;
+    }
+}

src/SharpEmu.Libs/AppContent/AppContentExports.cs

@@ -2,11 +2,44 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Text;
+using System.Text.Json;
 
 namespace SharpEmu.Libs.AppContent;
 
 public static class AppContentExports
 {
+    private const ulong BootParamAttrOffset = 4;
+    private const string Temp0MountPoint = "/temp0";
+    private const uint AppParamSkuFlag = 0;
+    private const int AppParamSkuFlagFull = 3;
+
+    [SysAbiExport(
+        Nid = "R9lA82OraNs",
+        ExportName = "sceAppContentInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAppContent")]
+    public static int AppContentInitialize(CpuContext ctx)
+    {
+        var initParamAddress = ctx[CpuRegister.Rdi];
+        var bootParamAddress = ctx[CpuRegister.Rsi];
+        if (initParamAddress == 0 || bootParamAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        Span<byte> attrBytes = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(attrBytes, 0);
+        if (!ctx.Memory.TryWrite(bootParamAddress + BootParamAttrOffset, attrBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "xnd8BJzAxmk",
         ExportName = "sceAppContentGetAddcontInfoList",
@@ -14,7 +47,165 @@ public static class AppContentExports
         LibraryName = "libSceAppContent")]
     public static int AppContentGetAddcontInfoList(CpuContext ctx)
     {
-        _ = ctx;
+        var hitCountAddress = ctx[CpuRegister.Rcx];
+        if (hitCountAddress != 0)
+        {
+            Span<byte> hitCountBytes = stackalloc byte[sizeof(uint)];
+            BinaryPrimitives.WriteUInt32LittleEndian(hitCountBytes, 0);
+            if (!ctx.Memory.TryWrite(hitCountAddress, hitCountBytes))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+        }
+
+        ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
+
+    [SysAbiExport(
+        Nid = "99b82IKXpH4",
+        ExportName = "sceAppContentAppParamGetInt",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAppContent")]
+    public static int AppContentAppParamGetInt(CpuContext ctx)
+    {
+        var paramId = (uint)ctx[CpuRegister.Rdi];
+        var valueAddress = ctx[CpuRegister.Rsi];
+        if (valueAddress == 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        int value;
+        if (paramId == AppParamSkuFlag)
+        {
+            value = AppParamSkuFlagFull;
+        }
+        else if (!TryReadUserDefinedParam(paramId, out value))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> valueBytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(valueBytes, value);
+        if (!ctx.Memory.TryWrite(valueAddress, valueBytes))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceAppContent($"app_param_get_int id={paramId} value={value}");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "buYbeLOGWmA",
+        ExportName = "sceAppContentTemporaryDataMount2",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAppContent")]
+    public static int AppContentTemporaryDataMount2(CpuContext ctx)
+    {
+        var mountPointAddress = ctx[CpuRegister.Rsi];
+        if (mountPointAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        Directory.CreateDirectory(ResolveTemp0Root());
+        var mountPointBytes = Encoding.ASCII.GetBytes($"{Temp0MountPoint}\0");
+        if (!ctx.Memory.TryWrite(mountPointAddress, mountPointBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static bool TryReadUserDefinedParam(uint paramId, out int value)
+    {
+        value = 0;
+        if (paramId is < 1 or > 4)
+        {
+            return false;
+        }
+
+        var app0Root = Environment.GetEnvironmentVariable("SHARPEMU_APP0_DIR");
+        if (string.IsNullOrWhiteSpace(app0Root))
+        {
+            return true;
+        }
+
+        var paramJsonPath = Path.Combine(app0Root, "sce_sys", "param.json");
+        if (!File.Exists(paramJsonPath))
+        {
+            return true;
+        }
+
+        try
+        {
+            using var stream = File.OpenRead(paramJsonPath);
+            using var document = JsonDocument.Parse(stream);
+            var propertyName = $"userDefinedParam{paramId}";
+            if (document.RootElement.TryGetProperty(propertyName, out var element) &&
+                element.TryGetInt32(out var parsedValue))
+            {
+                value = parsedValue;
+            }
+
+            return true;
+        }
+        catch (IOException)
+        {
+            return true;
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return true;
+        }
+        catch (JsonException)
+        {
+            return true;
+        }
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
+
+    private static void TraceAppContent(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_APP_CONTENT"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] app_content.{message}");
+    }
+
+    private static string ResolveTemp0Root()
+    {
+        const string temp0VariableName = "SHARPEMU_TEMP0_DIR";
+        var configuredRoot = Environment.GetEnvironmentVariable(temp0VariableName);
+        if (!string.IsNullOrWhiteSpace(configuredRoot))
+        {
+            return Path.GetFullPath(configuredRoot);
+        }
+
+        var app0Root = Environment.GetEnvironmentVariable("SHARPEMU_APP0_DIR");
+        var appName = string.IsNullOrWhiteSpace(app0Root)
+            ? "default"
+            : Path.GetFileName(Path.TrimEndingDirectorySeparator(app0Root));
+        if (string.IsNullOrWhiteSpace(appName))
+        {
+            appName = "default";
+        }
+
+        var invalidChars = Path.GetInvalidFileNameChars();
+        appName = new string(appName.Select(ch => invalidChars.Contains(ch) ? '_' : ch).ToArray());
+        var root = Path.Combine(Path.GetTempPath(), "SharpEmu", appName, "temp0");
+        Environment.SetEnvironmentVariable(temp0VariableName, root);
+        return root;
+    }
 }

src/SharpEmu.Libs/Audio/AudioOut2Exports.cs

@@ -0,0 +1,224 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Threading;
+
+namespace SharpEmu.Libs.Audio;
+
+public static class AudioOut2Exports
+{
+    private const int AudioOut2ContextParamSize = 0x80;
+    private const int AudioOut2ContextMemorySize = 0x10000;
+    private const int AudioOut2ContextMemoryAlignment = 0x10000;
+    private static long _nextContextHandle = 1;
+    private static long _nextUserHandle = 1;
+    private static int _nextPortId;
+
+    [SysAbiExport(
+        Nid = "g2tViFIohHE",
+        ExportName = "sceAudioOut2Initialize",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2Initialize(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "t5YrizufpQc",
+        ExportName = "sceAudioOut2ContextResetParam",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextResetParam(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        if (paramAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> param = stackalloc byte[AudioOut2ContextParamSize];
+        param.Clear();
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x00..], AudioOut2ContextParamSize);
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x04..], 2);
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x08..], 48000);
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x0C..], 0x400);
+
+        return ctx.Memory.TryWrite(paramAddress, param)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "pDmme7Bgm6E",
+        ExportName = "sceAudioOut2ContextQueryMemory",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextQueryMemory(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        var memoryInfoAddress = ctx[CpuRegister.Rsi];
+        if (paramAddress == 0 || memoryInfoAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> memoryInfo = stackalloc byte[0x20];
+        memoryInfo.Clear();
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x00..], AudioOut2ContextMemorySize);
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x08..], AudioOut2ContextMemoryAlignment);
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x10..], AudioOut2ContextMemorySize);
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x18..], AudioOut2ContextMemoryAlignment);
+
+        return ctx.Memory.TryWrite(memoryInfoAddress, memoryInfo)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "0x6o1VVAYSY",
+        ExportName = "sceAudioOut2ContextCreate",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextCreate(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        var memoryAddress = ctx[CpuRegister.Rsi];
+        var memorySize = ctx[CpuRegister.Rdx];
+        var outContextAddress = ctx[CpuRegister.Rcx];
+        if (paramAddress == 0 || memoryAddress == 0 || memorySize == 0 || outContextAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = (ulong)Interlocked.Increment(ref _nextContextHandle);
+        return ctx.TryWriteUInt64(outContextAddress, handle)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "on6ZH7Abo10",
+        ExportName = "sceAudioOut2ContextDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextDestroy(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "JK2wamZPzwM",
+        ExportName = "sceAudioOut2PortCreate",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2PortCreate(CpuContext ctx)
+    {
+        var type = unchecked((int)ctx[CpuRegister.Rdi]);
+        var paramAddress = ctx[CpuRegister.Rsi];
+        var outPortAddress = ctx[CpuRegister.Rdx];
+        var contextAddress = ctx[CpuRegister.Rcx];
+        if (type < 0 || type > 255 || paramAddress == 0 || outPortAddress == 0 || contextAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var portId = unchecked((uint)Interlocked.Increment(ref _nextPortId)) & 0xFF;
+        var handle = 0x2000_0000UL | ((ulong)(uint)type << 16) | portId;
+        return ctx.TryWriteUInt64(outPortAddress, handle)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "gatEUKG+Ea4",
+        ExportName = "sceAudioOut2PortGetState",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2PortGetState(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var stateAddress = ctx[CpuRegister.Rsi];
+        if (handle == 0 || stateAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var type = (int)((handle >> 16) & 0xFF);
+        Span<byte> state = stackalloc byte[0x20];
+        state.Clear();
+        var output = type == 2 ? 0x40 : 0x01;
+        var channels = type == 2 ? 1 : 2;
+        BinaryPrimitives.WriteUInt16LittleEndian(state[0x00..], unchecked((ushort)output));
+        state[0x02] = unchecked((byte)channels);
+        BinaryPrimitives.WriteInt16LittleEndian(state[0x04..], -1);
+
+        return ctx.Memory.TryWrite(stateAddress, state)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "DImz2Ft9E2g",
+        ExportName = "sceAudioOut2GetSpeakerInfo",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2GetSpeakerInfo(CpuContext ctx)
+    {
+        var infoAddress = ctx[CpuRegister.Rdi];
+        if (infoAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> info = stackalloc byte[0x40];
+        info.Clear();
+        BinaryPrimitives.WriteUInt32LittleEndian(info[0x00..], 1);
+        BinaryPrimitives.WriteUInt32LittleEndian(info[0x04..], 2);
+        BinaryPrimitives.WriteUInt32LittleEndian(info[0x08..], 48000);
+
+        return ctx.Memory.TryWrite(infoAddress, info)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "cd+Rtw+D1x8",
+        ExportName = "sceAudioOut2PortDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2PortDestroy(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "IaZXJ9M79uo",
+        ExportName = "sceAudioOut2UserDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2UserDestroy(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "xywYcRB7nbQ",
+        ExportName = "sceAudioOut2UserCreate",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2UserCreate(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var outUserAddress = ctx[CpuRegister.Rsi];
+        if ((userId != 0 && userId != 1 && userId != 255) || outUserAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = (ulong)Interlocked.Increment(ref _nextUserHandle);
+        return ctx.TryWriteUInt64(outUserAddress, handle)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/Audio/AudioOutExports.cs

@@ -0,0 +1,242 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers;
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.Threading;
+
+namespace SharpEmu.Libs.Audio;
+
+public static class AudioOutExports
+{
+    private static readonly ConcurrentDictionary<int, PortState> Ports = new();
+    private static int _nextPortHandle;
+
+    private sealed class PortState : IDisposable
+    {
+        private readonly object _paceGate = new();
+        private long _nextSilentOutput;
+
+        public PortState(
+            int userId,
+            int type,
+            uint bufferLength,
+            uint frequency,
+            int format,
+            int channels,
+            int bytesPerSample,
+            bool isFloat,
+            WinMmAudioPort? backend)
+        {
+            UserId = userId;
+            Type = type;
+            BufferLength = bufferLength;
+            Frequency = frequency;
+            Format = format;
+            Channels = channels;
+            BytesPerSample = bytesPerSample;
+            IsFloat = isFloat;
+            Backend = backend;
+        }
+
+        public int UserId { get; }
+        public int Type { get; }
+        public uint BufferLength { get; }
+        public uint Frequency { get; }
+        public int Format { get; }
+        public int Channels { get; }
+        public int BytesPerSample { get; }
+        public bool IsFloat { get; }
+        public WinMmAudioPort? Backend { get; }
+        public int BufferByteLength =>
+            checked((int)BufferLength * Channels * BytesPerSample);
+
+        public void PaceSilence()
+        {
+            long delay;
+            lock (_paceGate)
+            {
+                var now = Stopwatch.GetTimestamp();
+                if (_nextSilentOutput < now)
+                {
+                    _nextSilentOutput = now;
+                }
+
+                delay = _nextSilentOutput - now;
+                _nextSilentOutput += checked(
+                    (long)Math.Ceiling(
+                        Stopwatch.Frequency * (double)BufferLength / Frequency));
+            }
+
+            if (delay > 0)
+            {
+                Thread.Sleep(TimeSpan.FromSeconds((double)delay / Stopwatch.Frequency));
+            }
+        }
+
+        public void Dispose() => Backend?.Dispose();
+    }
+
+    [SysAbiExport(
+        Nid = "JfEPXVxhFqA",
+        ExportName = "sceAudioOutInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutInit(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "ekNvsT22rsY",
+        ExportName = "sceAudioOutOpen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutOpen(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var type = unchecked((int)ctx[CpuRegister.Rsi]);
+        var bufferLength = unchecked((uint)ctx[CpuRegister.Rcx]);
+        var frequency = unchecked((uint)ctx[CpuRegister.R8]);
+        var format = unchecked((int)ctx[CpuRegister.R9]);
+        if (bufferLength == 0 || frequency == 0 ||
+            !TryGetFormat(format, out var channels, out var bytesPerSample, out var isFloat))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        WinMmAudioPort? backend = null;
+        string backendName;
+        try
+        {
+            backend = new WinMmAudioPort(frequency);
+            backendName = "winmm";
+        }
+        catch (Exception exception)
+        {
+            backendName = "silent";
+            Console.Error.WriteLine(
+                $"[LOADER][WARN] AudioOut host backend unavailable: {exception.Message}");
+        }
+
+        var handle = Interlocked.Increment(ref _nextPortHandle);
+        Ports[handle] = new PortState(
+            userId,
+            type,
+            bufferLength,
+            frequency,
+            format,
+            channels,
+            bytesPerSample,
+            isFloat,
+            backend);
+        Console.Error.WriteLine(
+            $"[LOADER][INFO] AudioOut port {handle}: {frequency} Hz, " +
+            $"{channels} ch, {(isFloat ? "float32" : "s16")}, " +
+            $"{bufferLength} frames, backend={backendName}");
+        return SetReturn(ctx, handle);
+    }
+
+    [SysAbiExport(
+        Nid = "s1--uE9mBFw",
+        ExportName = "sceAudioOutClose",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutClose(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        if (!Ports.TryRemove(handle, out var port))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        port.Dispose();
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "QOQtbeDqsT4",
+        ExportName = "sceAudioOutOutput",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutOutput(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        var sourceAddress = ctx[CpuRegister.Rsi];
+        if (!Ports.TryGetValue(handle, out var port))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (sourceAddress == 0)
+        {
+            return SetReturn(ctx, 0);
+        }
+
+        var buffer = ArrayPool<byte>.Shared.Rent(port.BufferByteLength);
+        try
+        {
+            var source = buffer.AsSpan(0, port.BufferByteLength);
+            if (!ctx.Memory.TryRead(sourceAddress, source))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            if (port.Backend is null ||
+                !port.Backend.Submit(
+                    source,
+                    port.BufferLength,
+                    port.Channels,
+                    port.BytesPerSample,
+                    port.IsFloat))
+            {
+                port.PaceSilence();
+            }
+
+            return SetReturn(ctx, 0);
+        }
+        finally
+        {
+            ArrayPool<byte>.Shared.Return(buffer);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "b+uAV89IlxE",
+        ExportName = "sceAudioOutSetVolume",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutSetVolume(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        return SetReturn(
+            ctx,
+            Ports.ContainsKey(handle)
+                ? 0
+                : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static bool TryGetFormat(
+        int rawFormat,
+        out int channels,
+        out int bytesPerSample,
+        out bool isFloat)
+    {
+        var format = rawFormat & 0xFF;
+        channels = format switch
+        {
+            0 or 3 => 1,
+            1 or 4 => 2,
+            2 or 5 or 6 or 7 => 8,
+            _ => 0,
+        };
+        bytesPerSample = format is >= 3 and <= 5 or 7 ? 4 : 2;
+        isFloat = bytesPerSample == 4;
+        return channels != 0;
+    }
+}

src/SharpEmu.Libs/Audio/WinMmAudioPort.cs

@@ -0,0 +1,302 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Buffers;
+using System.Buffers.Binary;
+using System.Runtime.InteropServices;
+
+namespace SharpEmu.Libs.Audio;
+
+internal sealed class WinMmAudioPort : IDisposable
+{
+    private const uint WaveMapper = uint.MaxValue;
+    private const uint CallbackEvent = 0x0005_0000;
+    private const ushort WaveFormatPcm = 1;
+    private const uint WaveHeaderDone = 0x0000_0001;
+    private const int MaximumQueuedPcmBytes = 32 * 1024;
+
+    private readonly object _gate = new();
+    private readonly AutoResetEvent _completion = new(false);
+    private readonly Queue<NativeBuffer> _buffers = new();
+    private IntPtr _device;
+    private int _queuedPcmBytes;
+    private bool _disposed;
+
+    public WinMmAudioPort(uint sampleRate)
+    {
+        if (!OperatingSystem.IsWindows())
+        {
+            throw new PlatformNotSupportedException("WinMM audio is only available on Windows.");
+        }
+
+        var format = new WaveFormat
+        {
+            FormatTag = WaveFormatPcm,
+            Channels = 2,
+            SamplesPerSecond = sampleRate,
+            AverageBytesPerSecond = checked(sampleRate * 4),
+            BlockAlign = 4,
+            BitsPerSample = 16,
+            ExtraSize = 0,
+        };
+        var result = WaveOutOpen(
+            out _device,
+            WaveMapper,
+            ref format,
+            _completion.SafeWaitHandle.DangerousGetHandle(),
+            IntPtr.Zero,
+            CallbackEvent);
+        if (result != 0)
+        {
+            throw new InvalidOperationException($"waveOutOpen failed with MMRESULT {result}.");
+        }
+    }
+
+    public bool Submit(
+        ReadOnlySpan<byte> source,
+        uint frames,
+        int channels,
+        int bytesPerSample,
+        bool isFloat)
+    {
+        lock (_gate)
+        {
+            if (_disposed)
+            {
+                return false;
+            }
+
+            var outputLength = checked((int)frames * 4);
+            ReapCompletedBuffers();
+            while (_queuedPcmBytes != 0 &&
+                   _queuedPcmBytes + outputLength > MaximumQueuedPcmBytes)
+            {
+                if (!_completion.WaitOne(TimeSpan.FromSeconds(1)))
+                {
+                    return false;
+                }
+
+                ReapCompletedBuffers();
+            }
+
+            var output = ArrayPool<byte>.Shared.Rent(outputLength);
+            try
+            {
+                ConvertToStereoPcm16(
+                    source,
+                    output.AsSpan(0, outputLength),
+                    checked((int)frames),
+                    channels,
+                    bytesPerSample,
+                    isFloat);
+                return QueueBuffer(output.AsSpan(0, outputLength));
+            }
+            finally
+            {
+                ArrayPool<byte>.Shared.Return(output);
+            }
+        }
+    }
+
+    public void Dispose()
+    {
+        lock (_gate)
+        {
+            if (_disposed)
+            {
+                return;
+            }
+
+            _disposed = true;
+            if (_device != IntPtr.Zero)
+            {
+                WaveOutReset(_device);
+                while (_buffers.TryDequeue(out var buffer))
+                {
+                    ReleaseBuffer(buffer);
+                }
+
+                WaveOutClose(_device);
+                _device = IntPtr.Zero;
+            }
+
+            _completion.Dispose();
+        }
+    }
+
+    private bool QueueBuffer(ReadOnlySpan<byte> data)
+    {
+        var dataAddress = Marshal.AllocHGlobal(data.Length);
+        var headerAddress = IntPtr.Zero;
+        try
+        {
+            unsafe
+            {
+                data.CopyTo(new Span<byte>((void*)dataAddress, data.Length));
+            }
+
+            var header = new WaveHeader
+            {
+                Data = dataAddress,
+                BufferLength = checked((uint)data.Length),
+            };
+            headerAddress = Marshal.AllocHGlobal(Marshal.SizeOf<WaveHeader>());
+            Marshal.StructureToPtr(header, headerAddress, false);
+
+            var result = WaveOutPrepareHeader(
+                _device,
+                headerAddress,
+                checked((uint)Marshal.SizeOf<WaveHeader>()));
+            if (result != 0)
+            {
+                return false;
+            }
+
+            result = WaveOutWrite(
+                _device,
+                headerAddress,
+                checked((uint)Marshal.SizeOf<WaveHeader>()));
+            if (result != 0)
+            {
+                WaveOutUnprepareHeader(
+                    _device,
+                    headerAddress,
+                    checked((uint)Marshal.SizeOf<WaveHeader>()));
+                return false;
+            }
+
+            _buffers.Enqueue(new NativeBuffer(dataAddress, headerAddress, data.Length));
+            _queuedPcmBytes += data.Length;
+            dataAddress = IntPtr.Zero;
+            headerAddress = IntPtr.Zero;
+            return true;
+        }
+        finally
+        {
+            if (headerAddress != IntPtr.Zero)
+            {
+                Marshal.FreeHGlobal(headerAddress);
+            }
+
+            if (dataAddress != IntPtr.Zero)
+            {
+                Marshal.FreeHGlobal(dataAddress);
+            }
+        }
+    }
+
+    private void ReapCompletedBuffers()
+    {
+        while (_buffers.TryPeek(out var buffer))
+        {
+            var header = Marshal.PtrToStructure<WaveHeader>(buffer.Header);
+            if ((header.Flags & WaveHeaderDone) == 0)
+            {
+                return;
+            }
+
+            _buffers.Dequeue();
+            ReleaseBuffer(buffer);
+        }
+    }
+
+    private void ReleaseBuffer(NativeBuffer buffer)
+    {
+        WaveOutUnprepareHeader(
+            _device,
+            buffer.Header,
+            checked((uint)Marshal.SizeOf<WaveHeader>()));
+        _queuedPcmBytes -= buffer.Length;
+        Marshal.FreeHGlobal(buffer.Header);
+        Marshal.FreeHGlobal(buffer.Data);
+    }
+
+    private static void ConvertToStereoPcm16(
+        ReadOnlySpan<byte> source,
+        Span<byte> destination,
+        int frames,
+        int channels,
+        int bytesPerSample,
+        bool isFloat)
+    {
+        var sourceFrameSize = checked(channels * bytesPerSample);
+        for (var frame = 0; frame < frames; frame++)
+        {
+            var sourceFrame = source.Slice(frame * sourceFrameSize, sourceFrameSize);
+            var left = ReadSample(sourceFrame, 0, bytesPerSample, isFloat);
+            var right = channels == 1
+                ? left
+                : ReadSample(sourceFrame, 1, bytesPerSample, isFloat);
+            BinaryPrimitives.WriteInt16LittleEndian(destination[(frame * 4)..], left);
+            BinaryPrimitives.WriteInt16LittleEndian(destination[((frame * 4) + 2)..], right);
+        }
+    }
+
+    private static short ReadSample(
+        ReadOnlySpan<byte> frame,
+        int channel,
+        int bytesPerSample,
+        bool isFloat)
+    {
+        var sample = frame.Slice(channel * bytesPerSample, bytesPerSample);
+        if (!isFloat)
+        {
+            return BinaryPrimitives.ReadInt16LittleEndian(sample);
+        }
+
+        var bits = BinaryPrimitives.ReadInt32LittleEndian(sample);
+        var value = Math.Clamp(BitConverter.Int32BitsToSingle(bits), -1.0f, 1.0f);
+        return checked((short)MathF.Round(value * short.MaxValue));
+    }
+
+    private readonly record struct NativeBuffer(IntPtr Data, IntPtr Header, int Length);
+
+    [StructLayout(LayoutKind.Sequential, Pack = 2)]
+    private struct WaveFormat
+    {
+        public ushort FormatTag;
+        public ushort Channels;
+        public uint SamplesPerSecond;
+        public uint AverageBytesPerSecond;
+        public ushort BlockAlign;
+        public ushort BitsPerSample;
+        public ushort ExtraSize;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    private struct WaveHeader
+    {
+        public IntPtr Data;
+        public uint BufferLength;
+        public uint BytesRecorded;
+        public nuint User;
+        public uint Flags;
+        public uint Loops;
+        public IntPtr Next;
+        public nuint Reserved;
+    }
+
+    [DllImport("winmm.dll", EntryPoint = "waveOutOpen")]
+    private static extern uint WaveOutOpen(
+        out IntPtr device,
+        uint deviceId,
+        ref WaveFormat format,
+        IntPtr callback,
+        IntPtr instance,
+        uint flags);
+
+    [DllImport("winmm.dll", EntryPoint = "waveOutPrepareHeader")]
+    private static extern uint WaveOutPrepareHeader(IntPtr device, IntPtr header, uint headerSize);
+
+    [DllImport("winmm.dll", EntryPoint = "waveOutWrite")]
+    private static extern uint WaveOutWrite(IntPtr device, IntPtr header, uint headerSize);
+
+    [DllImport("winmm.dll", EntryPoint = "waveOutUnprepareHeader")]
+    private static extern uint WaveOutUnprepareHeader(IntPtr device, IntPtr header, uint headerSize);
+
+    [DllImport("winmm.dll", EntryPoint = "waveOutReset")]
+    private static extern uint WaveOutReset(IntPtr device);
+
+    [DllImport("winmm.dll", EntryPoint = "waveOutClose")]
+    private static extern uint WaveOutClose(IntPtr device);
+}

src/SharpEmu.Libs/AvPlayer/AvPlayerExports.cs

@@ -0,0 +1,77 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using SharpEmu.Libs.Kernel;
+
+namespace SharpEmu.Libs.AvPlayer;
+
+public static class AvPlayerExports
+{
+    private const int InvalidParameters = unchecked((int)0x806A0001);
+    private static readonly object StateGate = new();
+    private static readonly HashSet<ulong> Players = new();
+
+    [SysAbiExport(
+        Nid = "aS66RI0gGgo",
+        ExportName = "sceAvPlayerInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAvPlayer")]
+    public static int AvPlayerInit(CpuContext ctx)
+    {
+        if (ctx[CpuRegister.Rdi] == 0 ||
+            !KernelMemoryCompatExports.TryAllocateHleData(ctx, 0x40, 16, out var handle))
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return 0;
+        }
+
+        lock (StateGate)
+        {
+            Players.Add(handle);
+        }
+
+        ctx[CpuRegister.Rax] = handle;
+        return unchecked((int)handle);
+    }
+
+    [SysAbiExport(
+        Nid = "HD1YKVU26-M",
+        ExportName = "sceAvPlayerPostInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAvPlayer")]
+    public static int AvPlayerPostInit(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var dataAddress = ctx[CpuRegister.Rsi];
+        lock (StateGate)
+        {
+            return SetReturn(
+                ctx,
+                handle != 0 && dataAddress != 0 && Players.Contains(handle)
+                    ? 0
+                    : InvalidParameters);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "NkJwDzKmIlw",
+        ExportName = "sceAvPlayerClose",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAvPlayer")]
+    public static int AvPlayerClose(CpuContext ctx)
+    {
+        lock (StateGate)
+        {
+            return SetReturn(
+                ctx,
+                Players.Remove(ctx[CpuRegister.Rdi]) ? 0 : InvalidParameters);
+        }
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/CommonDialog/CommonDialogExports.cs

@@ -0,0 +1,38 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.CommonDialog;
+
+public static class CommonDialogExports
+{
+    private const int AlreadySystemInitialized = unchecked((int)0x80B80002);
+    private static int _initialized;
+
+    [SysAbiExport(
+        Nid = "uoUpLGNkygk",
+        ExportName = "sceCommonDialogInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceCommonDialog")]
+    public static int CommonDialogInitialize(CpuContext ctx)
+    {
+        var result = Interlocked.Exchange(ref _initialized, 1) == 0
+            ? 0
+            : AlreadySystemInitialized;
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    [SysAbiExport(
+        Nid = "BQ3tey0JmQM",
+        ExportName = "sceCommonDialogIsUsed",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceCommonDialog")]
+    public static int CommonDialogIsUsed(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+}

src/SharpEmu.Libs/CommonDialog/MsgDialogExports.cs

@@ -0,0 +1,27 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Threading;
+
+namespace SharpEmu.Libs.CommonDialog;
+
+public static class MsgDialogExports
+{
+    private const int AlreadyInitialized = unchecked((int)0x80B80002);
+    private static int _initialized;
+
+    [SysAbiExport(
+        Nid = "lDqxaY1UbEo",
+        ExportName = "sceMsgDialogInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceMsgDialog")]
+    public static int MsgDialogInitialize(CpuContext ctx)
+    {
+        var result = Interlocked.Exchange(ref _initialized, 1) == 0
+            ? 0
+            : AlreadyInitialized;
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/Fiber/FiberExports.cs

@@ -0,0 +1,964 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Buffers.Binary;
+using System.Collections.Concurrent;
+using System.Text;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Fiber;
+
+public static class FiberExports
+{
+    private const int MaxNameLength = 31;
+    private const int FiberInfoSize = 128;
+    private const int FiberContextMinimumSize = 512;
+    private const uint FiberSignature0 = 0xDEF1649C;
+    private const uint FiberSignature1 = 0xB37592A0;
+    private const uint FiberOptSignature = 0xBB40E64D;
+    private const ulong FiberStackSignature = 0x7149F2CA7149F2CAUL;
+    private const ulong FiberStackSizeCheck = 0xDEADBEEFDEADBEEFUL;
+    private const uint FiberStateRun = 1;
+    private const uint FiberStateIdle = 2;
+    private const uint FiberStateTerminated = 3;
+    private const uint FiberFlagContextSizeCheck = 0x10;
+
+    private const int FiberErrorNull = unchecked((int)0x80590001);
+    private const int FiberErrorAlignment = unchecked((int)0x80590002);
+    private const int FiberErrorRange = unchecked((int)0x80590003);
+    private const int FiberErrorInvalid = unchecked((int)0x80590004);
+    private const int FiberErrorPermission = unchecked((int)0x80590005);
+    private const int FiberErrorState = unchecked((int)0x80590006);
+
+    private const int FiberMagicStartOffset = 0;
+    private const int FiberStateOffset = 4;
+    private const int FiberEntryOffset = 8;
+    private const int FiberArgOnInitializeOffset = 16;
+    private const int FiberContextAddressOffset = 24;
+    private const int FiberContextSizeOffset = 32;
+    private const int FiberNameOffset = 40;
+    private const int FiberContextPointerOffset = 72;
+    private const int FiberFlagsOffset = 80;
+    private const int FiberContextStartOffset = 88;
+    private const int FiberContextEndOffset = 96;
+    private const int FiberMagicEndOffset = 104;
+
+    private static int _contextSizeCheck;
+
+    [ThreadStatic]
+    private static ulong _currentFiberAddress;
+
+    private static readonly object _fiberGate = new();
+    private static readonly ConcurrentDictionary<ulong, FiberContinuation> _continuations = new();
+    private static readonly ConcurrentDictionary<ulong, FiberReturnTarget> _returnTargets = new();
+    private static readonly ConcurrentDictionary<ulong, FiberStackRange> _stackRanges = new();
+
+    [SysAbiExport(
+        Nid = "hVYD7Ou2pCQ",
+        ExportName = "_sceFiberInitializeImpl",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberInitialize(CpuContext ctx)
+    {
+        var optParam = ReadStackArg64(ctx, 0);
+        return FiberInitializeCore(
+            ctx,
+            ctx[CpuRegister.Rdi],
+            ctx[CpuRegister.Rsi],
+            ctx[CpuRegister.Rdx],
+            ctx[CpuRegister.Rcx],
+            ctx[CpuRegister.R8],
+            ctx[CpuRegister.R9],
+            optParam,
+            flags: 0);
+    }
+
+    [SysAbiExport(
+        Nid = "7+OJIpko9RY",
+        ExportName = "_sceFiberInitializeWithInternalOptionImpl",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberInitializeWithInternalOption(CpuContext ctx)
+    {
+        var optParam = ReadStackArg64(ctx, 0);
+        var flags = unchecked((uint)ReadStackArg64(ctx, 1));
+        return FiberInitializeCore(
+            ctx,
+            ctx[CpuRegister.Rdi],
+            ctx[CpuRegister.Rsi],
+            ctx[CpuRegister.Rdx],
+            ctx[CpuRegister.Rcx],
+            ctx[CpuRegister.R8],
+            ctx[CpuRegister.R9],
+            optParam,
+            flags);
+    }
+
+    [SysAbiExport(
+        Nid = "asjUJJ+aa8s",
+        ExportName = "sceFiberOptParamInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberOptParamInitialize(CpuContext ctx)
+    {
+        var optParam = ctx[CpuRegister.Rdi];
+        if (optParam == 0)
+        {
+            return SetReturn(ctx, FiberErrorNull);
+        }
+
+        if ((optParam & 7) != 0)
+        {
+            return SetReturn(ctx, FiberErrorAlignment);
+        }
+
+        return ctx.TryWriteUInt32(optParam, FiberOptSignature)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, FiberErrorInvalid);
+    }
+
+    [SysAbiExport(
+        Nid = "JeNX5F-NzQU",
+        ExportName = "sceFiberFinalize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberFinalize(CpuContext ctx)
+    {
+        var fiber = ctx[CpuRegister.Rdi];
+        if (!TryValidateFiber(ctx, fiber, out var error))
+        {
+            return SetReturn(ctx, error);
+        }
+
+        if (!ctx.TryReadUInt32(fiber + FiberStateOffset, out var state))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (state != FiberStateIdle)
+        {
+            return SetReturn(ctx, FiberErrorState);
+        }
+
+        _continuations.TryRemove(fiber, out _);
+        _returnTargets.TryRemove(fiber, out _);
+        _stackRanges.TryRemove(fiber, out _);
+        _ = ctx.TryWriteUInt32(fiber + FiberStateOffset, FiberStateTerminated);
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "a0LLrZWac0M",
+        ExportName = "sceFiberRun",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberRun(CpuContext ctx)
+    {
+        return FiberRunCore(
+            ctx,
+            ctx[CpuRegister.Rdi],
+            ctx[CpuRegister.Rsi],
+            ctx[CpuRegister.Rdx],
+            attachContextAddress: 0,
+            attachContextSize: 0,
+            reason: "sceFiberRun",
+            isSwitch: false);
+    }
+
+    [SysAbiExport(
+        Nid = "avfGJ94g36Q",
+        ExportName = "_sceFiberAttachContextAndRun",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberAttachContextAndRun(CpuContext ctx)
+    {
+        return FiberRunCore(
+            ctx,
+            ctx[CpuRegister.Rdi],
+            ctx[CpuRegister.Rcx],
+            ctx[CpuRegister.R8],
+            attachContextAddress: ctx[CpuRegister.Rsi],
+            attachContextSize: ctx[CpuRegister.Rdx],
+            reason: "_sceFiberAttachContextAndRun",
+            isSwitch: false);
+    }
+
+    [SysAbiExport(
+        Nid = "PFT2S-tJ7Uk",
+        ExportName = "sceFiberSwitch",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberSwitch(CpuContext ctx)
+    {
+        return FiberRunCore(
+            ctx,
+            ctx[CpuRegister.Rdi],
+            ctx[CpuRegister.Rsi],
+            ctx[CpuRegister.Rdx],
+            attachContextAddress: 0,
+            attachContextSize: 0,
+            reason: "sceFiberSwitch",
+            isSwitch: true);
+    }
+
+    [SysAbiExport(
+        Nid = "ZqhZFuzKT6U",
+        ExportName = "_sceFiberAttachContextAndSwitch",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberAttachContextAndSwitch(CpuContext ctx)
+    {
+        return FiberRunCore(
+            ctx,
+            ctx[CpuRegister.Rdi],
+            ctx[CpuRegister.Rcx],
+            ctx[CpuRegister.R8],
+            attachContextAddress: ctx[CpuRegister.Rsi],
+            attachContextSize: ctx[CpuRegister.Rdx],
+            reason: "_sceFiberAttachContextAndSwitch",
+            isSwitch: true);
+    }
+
+    [SysAbiExport(
+        Nid = "B0ZX2hx9DMw",
+        ExportName = "sceFiberReturnToThread",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberReturnToThread(CpuContext ctx)
+    {
+        var fiberAddress = ResolveCurrentFiberAddress(ctx);
+        if (fiberAddress == 0)
+        {
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+
+        if (GuestThreadExecution.Scheduler is not { SupportsGuestContextTransfer: true } ||
+            !GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
+        {
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+
+        var returnArgument = ctx[CpuRegister.Rdi];
+        var argOnRunAddress = ctx[CpuRegister.Rsi];
+        if (argOnRunAddress != 0 && !ctx.TryWriteUInt64(argOnRunAddress, 0))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        GuestCpuContinuation transferTarget;
+        ulong previousFiber;
+        lock (_fiberGate)
+        {
+            _continuations[fiberAddress] = new FiberContinuation(
+                CaptureContinuation(ctx, frame.ReturnRip, frame.ResumeRsp, frame.ReturnSlotAddress),
+                argOnRunAddress);
+
+            if (!_returnTargets.TryRemove(fiberAddress, out var returnTarget))
+            {
+                _continuations.TryRemove(fiberAddress, out _);
+                return SetReturn(ctx, FiberErrorPermission);
+            }
+
+            previousFiber = returnTarget.PreviousFiber;
+            if (previousFiber != 0)
+            {
+                if (!_continuations.TryRemove(previousFiber, out var previousContinuation) ||
+                    !TryWriteResumeArgument(ctx, previousContinuation, returnArgument) ||
+                    !ctx.TryWriteUInt32(previousFiber + FiberStateOffset, FiberStateRun))
+                {
+                    _continuations.TryRemove(fiberAddress, out _);
+                    return SetReturn(ctx, FiberErrorState);
+                }
+
+                transferTarget = previousContinuation.Context with { Rax = 0 };
+            }
+            else
+            {
+                if (!returnTarget.ThreadContinuation.HasValue ||
+                    !TryWriteResumeArgument(ctx, returnTarget.ThreadContinuation.Value, returnArgument))
+                {
+                    _continuations.TryRemove(fiberAddress, out _);
+                    return SetReturn(ctx, FiberErrorState);
+                }
+
+                transferTarget = returnTarget.ThreadContinuation.Value.Context with { Rax = 0 };
+            }
+
+            if (!ctx.TryWriteUInt32(fiberAddress + FiberStateOffset, FiberStateIdle))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+        }
+
+        _currentFiberAddress = previousFiber;
+        _ = GuestThreadExecution.EnterFiber(previousFiber);
+        GuestThreadExecution.RequestCurrentContextTransfer(transferTarget);
+        TraceFiber(
+            $"return fiber=0x{fiberAddress:X16} to=0x{previousFiber:X16} " +
+            $"resume=0x{transferTarget.Rip:X16} rsp=0x{transferTarget.Rsp:X16} arg=0x{returnArgument:X16}");
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "p+zLIOg27zU",
+        ExportName = "sceFiberGetSelf",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberGetSelf(CpuContext ctx)
+    {
+        var outAddress = ctx[CpuRegister.Rdi];
+        if (outAddress == 0)
+        {
+            return SetReturn(ctx, FiberErrorNull);
+        }
+
+        var fiberAddress = ResolveCurrentFiberAddress(ctx);
+        if (fiberAddress == 0)
+        {
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+
+        return ctx.TryWriteUInt64(outAddress, fiberAddress)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, FiberErrorInvalid);
+    }
+
+    [SysAbiExport(
+        Nid = "uq2Y5BFz0PE",
+        ExportName = "sceFiberGetInfo",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberGetInfo(CpuContext ctx)
+    {
+        var fiber = ctx[CpuRegister.Rdi];
+        var info = ctx[CpuRegister.Rsi];
+        if (info == 0)
+        {
+            return SetReturn(ctx, FiberErrorNull);
+        }
+
+        if (!TryValidateFiber(ctx, fiber, out var error))
+        {
+            return SetReturn(ctx, error);
+        }
+
+        if (!ctx.TryReadUInt64(info, out var size) || size != FiberInfoSize)
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (!TryReadFiberFields(ctx, fiber, out var fields))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (!ctx.TryWriteUInt64(info + 8, fields.Entry) ||
+            !ctx.TryWriteUInt64(info + 16, fields.ArgOnInitialize) ||
+            !ctx.TryWriteUInt64(info + 24, fields.ContextAddress) ||
+            !ctx.TryWriteUInt64(info + 32, fields.ContextSize) ||
+            !TryWriteName(ctx, info + 40, fields.Name) ||
+            !ctx.TryWriteUInt64(info + 72, ulong.MaxValue))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "JzyT91ucGDc",
+        ExportName = "sceFiberRename",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberRename(CpuContext ctx)
+    {
+        var fiber = ctx[CpuRegister.Rdi];
+        var nameAddress = ctx[CpuRegister.Rsi];
+        if (!TryValidateFiber(ctx, fiber, out var error))
+        {
+            return SetReturn(ctx, error);
+        }
+
+        if (nameAddress == 0)
+        {
+            return SetReturn(ctx, FiberErrorNull);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxNameLength + 1, out var name))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        return TryWriteName(ctx, fiber + FiberNameOffset, name)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, FiberErrorInvalid);
+    }
+
+    [SysAbiExport(
+        Nid = "Lcqty+QNWFc",
+        ExportName = "sceFiberStartContextSizeCheck",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberStartContextSizeCheck(CpuContext ctx)
+    {
+        if (ctx[CpuRegister.Rdi] != 0)
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        return Interlocked.Exchange(ref _contextSizeCheck, 1) == 0
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, FiberErrorState);
+    }
+
+    [SysAbiExport(
+        Nid = "Kj4nXMpnM8Y",
+        ExportName = "sceFiberStopContextSizeCheck",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberStopContextSizeCheck(CpuContext ctx)
+    {
+        return Interlocked.Exchange(ref _contextSizeCheck, 0) == 1
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, FiberErrorState);
+    }
+
+    [SysAbiExport(
+        Nid = "0dy4JtMUcMQ",
+        ExportName = "_sceFiberGetThreadFramePointerAddress",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceFiber")]
+    public static int FiberGetThreadFramePointerAddress(CpuContext ctx)
+    {
+        var outAddress = ctx[CpuRegister.Rdi];
+        if (outAddress == 0)
+        {
+            return SetReturn(ctx, FiberErrorNull);
+        }
+
+        if (ResolveCurrentFiberAddress(ctx) == 0)
+        {
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+
+        return ctx.TryWriteUInt64(outAddress, ctx[CpuRegister.Rbp])
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, FiberErrorInvalid);
+    }
+
+    private static int FiberInitializeCore(
+        CpuContext ctx,
+        ulong fiber,
+        ulong nameAddress,
+        ulong entry,
+        ulong argOnInitialize,
+        ulong contextAddress,
+        ulong contextSize,
+        ulong optParam,
+        uint flags)
+    {
+        if (fiber == 0 || nameAddress == 0 || entry == 0)
+        {
+            return SetReturn(ctx, FiberErrorNull);
+        }
+
+        if ((fiber & 7) != 0 ||
+            (contextAddress & 15) != 0 ||
+            (optParam & 7) != 0)
+        {
+            return SetReturn(ctx, FiberErrorAlignment);
+        }
+
+        if (contextSize != 0 && contextSize < FiberContextMinimumSize)
+        {
+            return SetReturn(ctx, FiberErrorRange);
+        }
+
+        if ((contextSize & 15) != 0 ||
+            (contextAddress == 0 && contextSize != 0) ||
+            (contextAddress != 0 && contextSize == 0))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (optParam != 0 &&
+            (!ctx.TryReadUInt32(optParam, out var optMagic) || optMagic != FiberOptSignature))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxNameLength + 1, out var name))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (Volatile.Read(ref _contextSizeCheck) != 0)
+        {
+            flags |= FiberFlagContextSizeCheck;
+        }
+
+        if (!ctx.TryWriteUInt32(fiber + FiberMagicStartOffset, FiberSignature0) ||
+            !ctx.TryWriteUInt32(fiber + FiberStateOffset, FiberStateIdle) ||
+            !ctx.TryWriteUInt64(fiber + FiberEntryOffset, entry) ||
+            !ctx.TryWriteUInt64(fiber + FiberArgOnInitializeOffset, argOnInitialize) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextAddressOffset, contextAddress) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextSizeOffset, contextSize) ||
+            !TryWriteName(ctx, fiber + FiberNameOffset, name) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextPointerOffset, 0) ||
+            !ctx.TryWriteUInt32(fiber + FiberFlagsOffset, flags) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextStartOffset, contextAddress) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextEndOffset, contextAddress == 0 ? 0 : contextAddress + contextSize) ||
+            !ctx.TryWriteUInt32(fiber + FiberMagicEndOffset, FiberSignature1))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (contextAddress != 0)
+        {
+            if (!ctx.TryWriteUInt64(contextAddress, FiberStackSignature))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+
+            if ((flags & FiberFlagContextSizeCheck) != 0)
+            {
+                FillContextSizeCheck(ctx, contextAddress + sizeof(ulong), contextSize - sizeof(ulong));
+            }
+        }
+
+        if (contextAddress != 0 && contextSize != 0)
+        {
+            _stackRanges[fiber] = new FiberStackRange(contextAddress, contextSize);
+        }
+
+        TraceFiber($"init fiber=0x{fiber:X16} entry=0x{entry:X16} ctx=0x{contextAddress:X16} size=0x{contextSize:X} name='{name}'");
+        return SetReturn(ctx, 0);
+    }
+
+    private static int FiberRunCore(
+        CpuContext ctx,
+        ulong fiber,
+        ulong argOnRun,
+        ulong outArgumentAddress,
+        ulong attachContextAddress,
+        ulong attachContextSize,
+        string reason,
+        bool isSwitch)
+    {
+        if (!TryValidateFiber(ctx, fiber, out var error))
+        {
+            return SetReturn(ctx, error);
+        }
+
+        if (!TryReadFiberFields(ctx, fiber, out var fields))
+        {
+            return SetReturn(ctx, FiberErrorInvalid);
+        }
+
+        if (attachContextAddress != 0 || attachContextSize != 0)
+        {
+            var attachResult = AttachContext(ctx, fiber, attachContextAddress, attachContextSize, ref fields);
+            if (attachResult != 0)
+            {
+                return SetReturn(ctx, attachResult);
+            }
+        }
+
+        var previousFiber = ResolveCurrentFiberAddress(ctx);
+        if ((isSwitch && previousFiber == 0) ||
+            (!isSwitch && previousFiber != 0))
+        {
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+        if (previousFiber == fiber)
+        {
+            return SetReturn(ctx, FiberErrorState);
+        }
+        if (GuestThreadExecution.Scheduler is not { SupportsGuestContextTransfer: true } ||
+            !GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
+        {
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+
+        GuestCpuContinuation transferTarget;
+        var resumed = false;
+        lock (_fiberGate)
+        {
+            if (!TryReadFiberFields(ctx, fiber, out fields))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+            if (fields.State != FiberStateIdle)
+            {
+                TraceFiber($"run-state-error reason={reason} fiber=0x{fiber:X16} state=0x{fields.State:X8}");
+                return SetReturn(ctx, FiberErrorState);
+            }
+
+            FiberContinuation targetContinuation;
+            if (_continuations.TryGetValue(fiber, out var savedContinuation))
+            {
+                targetContinuation = savedContinuation;
+                resumed = true;
+            }
+            else if (!TryCreateInitialContinuation(ctx, fields, argOnRun, out targetContinuation))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+
+            if (resumed && !TryWriteResumeArgument(ctx, targetContinuation, argOnRun))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+
+            var callerContinuation = new FiberContinuation(
+                CaptureContinuation(ctx, frame.ReturnRip, frame.ResumeRsp, frame.ReturnSlotAddress),
+                outArgumentAddress);
+
+            if (previousFiber != 0)
+            {
+                if (!ctx.TryReadUInt32(previousFiber + FiberStateOffset, out var previousState) ||
+                    previousState != FiberStateRun ||
+                    !ctx.TryWriteUInt32(previousFiber + FiberStateOffset, FiberStateIdle))
+                {
+                    return SetReturn(ctx, FiberErrorState);
+                }
+
+                _continuations[previousFiber] = callerContinuation;
+                _returnTargets[fiber] = new FiberReturnTarget(previousFiber, null);
+            }
+            else
+            {
+                _returnTargets[fiber] = new FiberReturnTarget(0, callerContinuation);
+            }
+
+            if (!ctx.TryWriteUInt32(fiber + FiberStateOffset, FiberStateRun))
+            {
+                if (previousFiber != 0)
+                {
+                    _continuations.TryRemove(previousFiber, out _);
+                    _ = ctx.TryWriteUInt32(previousFiber + FiberStateOffset, FiberStateRun);
+                }
+                _returnTargets.TryRemove(fiber, out _);
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+
+            if (resumed)
+            {
+                _continuations.TryRemove(fiber, out _);
+            }
+
+            transferTarget = targetContinuation.Context with { Rax = 0 };
+        }
+
+        _currentFiberAddress = fiber;
+        _ = GuestThreadExecution.EnterFiber(fiber);
+        GuestThreadExecution.RequestCurrentContextTransfer(transferTarget);
+        TraceFiber(
+            $"transfer reason={reason} from=0x{previousFiber:X16} to=0x{fiber:X16} resume={resumed} " +
+            $"rip=0x{transferTarget.Rip:X16} rsp=0x{transferTarget.Rsp:X16} arg=0x{argOnRun:X16}");
+        return SetReturn(ctx, 0);
+    }
+
+    private static bool TryCreateInitialContinuation(
+        CpuContext ctx,
+        FiberFields fields,
+        ulong argOnRun,
+        out FiberContinuation continuation)
+    {
+        continuation = default;
+        if (fields.ContextAddress == 0 || fields.ContextSize < FiberContextMinimumSize)
+        {
+            return false;
+        }
+
+        var stackEnd = fields.ContextAddress + fields.ContextSize;
+        var entryRsp = (stackEnd & ~15UL) - sizeof(ulong);
+        if (!ctx.TryWriteUInt64(entryRsp, 0))
+        {
+            return false;
+        }
+
+        continuation = new FiberContinuation(
+            new GuestCpuContinuation(
+                fields.Entry,
+                entryRsp,
+                entryRsp,
+                ctx.Rflags == 0 ? 0x202UL : ctx.Rflags,
+                ctx.FsBase,
+                ctx.GsBase,
+                0,
+                0,
+                0,
+                0,
+                0,
+                argOnRun,
+                fields.ArgOnInitialize,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0),
+            0);
+        return true;
+    }
+
+    private static bool TryWriteResumeArgument(
+        CpuContext ctx,
+        FiberContinuation continuation,
+        ulong argument) =>
+        continuation.ArgOnRunAddress == 0 ||
+        ctx.TryWriteUInt64(continuation.ArgOnRunAddress, argument);
+
+    private static GuestCpuContinuation CaptureContinuation(
+        CpuContext ctx,
+        ulong resumeRip,
+        ulong resumeRsp,
+        ulong returnSlotAddress) =>
+        new(
+            resumeRip,
+            resumeRsp,
+            returnSlotAddress,
+            ctx.Rflags == 0 ? 0x202UL : ctx.Rflags,
+            ctx.FsBase,
+            ctx.GsBase,
+            0,
+            ctx[CpuRegister.Rcx],
+            ctx[CpuRegister.Rdx],
+            ctx[CpuRegister.Rbx],
+            ctx[CpuRegister.Rbp],
+            ctx[CpuRegister.Rsi],
+            ctx[CpuRegister.Rdi],
+            ctx[CpuRegister.R8],
+            ctx[CpuRegister.R9],
+            ctx[CpuRegister.R12],
+            ctx[CpuRegister.R13],
+            ctx[CpuRegister.R14],
+            ctx[CpuRegister.R15]);
+
+    private static ulong ResolveCurrentFiberAddress(CpuContext ctx)
+    {
+        if (_currentFiberAddress != 0)
+        {
+            return _currentFiberAddress;
+        }
+
+        if (GuestThreadExecution.CurrentFiberAddress != 0)
+        {
+            return GuestThreadExecution.CurrentFiberAddress;
+        }
+
+        return TryFindFiberByStack(ctx, out var fiberAddress) ? fiberAddress : 0;
+    }
+
+    internal static ulong GetCurrentFiberAddressForDiagnostics(CpuContext ctx) =>
+        ResolveCurrentFiberAddress(ctx);
+
+    private static int AttachContext(
+        CpuContext ctx,
+        ulong fiber,
+        ulong contextAddress,
+        ulong contextSize,
+        ref FiberFields fields)
+    {
+        if ((contextAddress & 15) != 0)
+        {
+            return FiberErrorAlignment;
+        }
+
+        if (contextSize != 0 && contextSize < FiberContextMinimumSize)
+        {
+            return FiberErrorRange;
+        }
+
+        if ((contextSize & 15) != 0 ||
+            contextAddress == 0 ||
+            contextSize == 0 ||
+            fields.ContextAddress != 0)
+        {
+            return FiberErrorInvalid;
+        }
+
+        if (!ctx.TryWriteUInt64(fiber + FiberContextAddressOffset, contextAddress) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextSizeOffset, contextSize) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextStartOffset, contextAddress) ||
+            !ctx.TryWriteUInt64(fiber + FiberContextEndOffset, contextAddress + contextSize) ||
+            !ctx.TryWriteUInt64(contextAddress, FiberStackSignature))
+        {
+            return FiberErrorInvalid;
+        }
+
+        fields = fields with
+        {
+            ContextAddress = contextAddress,
+            ContextSize = contextSize,
+        };
+        _stackRanges[fiber] = new FiberStackRange(contextAddress, contextSize);
+        return 0;
+    }
+
+    private static bool TryFindFiberByStack(CpuContext ctx, out ulong fiber)
+    {
+        if (TryFindFiberByStackAddress(ctx[CpuRegister.Rsp], out fiber))
+        {
+            return true;
+        }
+
+        return TryFindFiberByStackAddress(ctx[CpuRegister.Rbp], out fiber);
+    }
+
+    private static bool TryFindFiberByStackAddress(ulong address, out ulong fiber)
+    {
+        if (address != 0)
+        {
+            foreach (var (candidate, range) in _stackRanges)
+            {
+                if (range.Contains(address))
+                {
+                    fiber = candidate;
+                    return true;
+                }
+            }
+        }
+
+        fiber = 0;
+        return false;
+    }
+
+    private static bool TryValidateFiber(CpuContext ctx, ulong fiber, out int error)
+    {
+        if (fiber == 0)
+        {
+            error = FiberErrorNull;
+            return false;
+        }
+
+        if ((fiber & 7) != 0)
+        {
+            error = FiberErrorAlignment;
+            return false;
+        }
+
+        if (!ctx.TryReadUInt32(fiber + FiberMagicStartOffset, out var magicStart) ||
+            !ctx.TryReadUInt32(fiber + FiberMagicEndOffset, out var magicEnd) ||
+            magicStart != FiberSignature0 ||
+            magicEnd != FiberSignature1)
+        {
+            error = FiberErrorInvalid;
+            return false;
+        }
+
+        error = 0;
+        return true;
+    }
+
+    private static bool TryReadFiberFields(CpuContext ctx, ulong fiber, out FiberFields fields)
+    {
+        fields = default;
+        if (!ctx.TryReadUInt32(fiber + FiberStateOffset, out var state) ||
+            !ctx.TryReadUInt64(fiber + FiberEntryOffset, out var entry) ||
+            !ctx.TryReadUInt64(fiber + FiberArgOnInitializeOffset, out var argOnInitialize) ||
+            !ctx.TryReadUInt64(fiber + FiberContextAddressOffset, out var contextAddress) ||
+            !ctx.TryReadUInt64(fiber + FiberContextSizeOffset, out var contextSize) ||
+            !ctx.TryReadUInt32(fiber + FiberFlagsOffset, out var flags) ||
+            !TryReadInlineName(ctx, fiber + FiberNameOffset, out var name))
+        {
+            return false;
+        }
+
+        fields = new FiberFields(
+            state,
+            entry,
+            argOnInitialize,
+            contextAddress,
+            contextSize,
+            flags,
+            name);
+        return true;
+    }
+
+    private static void FillContextSizeCheck(CpuContext ctx, ulong address, ulong size)
+    {
+        Span<byte> value = stackalloc byte[sizeof(ulong)];
+        BinaryPrimitives.WriteUInt64LittleEndian(value, FiberStackSizeCheck);
+        var end = address + size;
+        for (var current = address; current + sizeof(ulong) <= end; current += sizeof(ulong))
+        {
+            _ = ctx.Memory.TryWrite(current, value);
+        }
+    }
+
+    private static ulong ReadStackArg64(CpuContext ctx, int index)
+    {
+        if (ctx.TryReadUInt64(ctx[CpuRegister.Rsp] + sizeof(ulong) + ((ulong)index * sizeof(ulong)), out var value))
+        {
+            return value;
+        }
+
+        return 0;
+    }
+
+    private static bool TryWriteName(CpuContext ctx, ulong address, string name)
+    {
+        Span<byte> buffer = stackalloc byte[MaxNameLength + 1];
+        var bytes = Encoding.UTF8.GetBytes(name);
+        bytes.AsSpan(0, Math.Min(bytes.Length, MaxNameLength)).CopyTo(buffer);
+        return ctx.Memory.TryWrite(address, buffer);
+    }
+
+    private static bool TryReadInlineName(CpuContext ctx, ulong address, out string value)
+    {
+        Span<byte> buffer = stackalloc byte[MaxNameLength + 1];
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            value = string.Empty;
+            return false;
+        }
+
+        var length = buffer.IndexOf((byte)0);
+        if (length < 0)
+        {
+            length = buffer.Length;
+        }
+
+        value = Encoding.UTF8.GetString(buffer[..length]);
+        return true;
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceFiber(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_FIBER"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] fiber.{message}");
+        }
+    }
+
+    private readonly record struct FiberFields(
+        uint State,
+        ulong Entry,
+        ulong ArgOnInitialize,
+        ulong ContextAddress,
+        ulong ContextSize,
+        uint Flags,
+        string Name);
+
+    private readonly record struct FiberContinuation(
+        GuestCpuContinuation Context,
+        ulong ArgOnRunAddress);
+
+    private readonly record struct FiberReturnTarget(
+        ulong PreviousFiber,
+        FiberContinuation? ThreadContinuation);
+
+    private readonly record struct FiberStackRange(ulong Start, ulong Size)
+    {
+        public bool Contains(ulong address) =>
+            Size != 0 && address >= Start && address < Start + Size;
+    }
+}

src/SharpEmu.Libs/GameUpdate/GameUpdateExports.cs

@@ -0,0 +1,24 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.GameUpdate;
+
+public static class GameUpdateExports
+{
+    private static int _initialized;
+
+    [SysAbiExport(
+        Nid = "YJtKLttI9fM",
+        ExportName = "sceGameUpdateInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceGameUpdate")]
+    public static int GameUpdateInitialize(CpuContext ctx)
+    {
+        Interlocked.Exchange(ref _initialized, 1);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+}

src/SharpEmu.Libs/Json/JsonExports.cs

@@ -0,0 +1,91 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Json;
+
+public static class JsonExports
+{
+    [SysAbiExport(
+        Nid = "-hJRce8wn1U",
+        ExportName = "_ZN3sce4Json12MemAllocatorC2Ev",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceJson")]
+    public static int MemAllocatorConstructor(CpuContext ctx)
+    {
+        var thisAddress = ctx[CpuRegister.Rdi];
+        TraceJson("MemAllocator.ctor", thisAddress, 0);
+        ctx[CpuRegister.Rax] = thisAddress;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "OcAgPxcq5Vk",
+        ExportName = "_ZN3sce4Json12MemAllocatorD2Ev",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceJson")]
+    public static int MemAllocatorDestructor(CpuContext ctx)
+    {
+        TraceJson("MemAllocator.dtor", ctx[CpuRegister.Rdi], 0);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "cK6bYHf-Q5E",
+        ExportName = "_ZN3sce4Json11InitializerC1Ev",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceJson")]
+    public static int InitializerConstructor(CpuContext ctx)
+    {
+        var thisAddress = ctx[CpuRegister.Rdi];
+        TraceJson("Initializer.ctor", thisAddress, 0);
+        ctx[CpuRegister.Rax] = thisAddress;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "RujUxbr3haM",
+        ExportName = "_ZN3sce4Json11InitializerD1Ev",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceJson")]
+    public static int InitializerDestructor(CpuContext ctx)
+    {
+        TraceJson("Initializer.dtor", ctx[CpuRegister.Rdi], 0);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "Cxwy7wHq4J0",
+        ExportName = "_ZN3sce4Json11Initializer10initializeEPKNS0_13InitParameterE",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceJson")]
+    public static int InitializerInitialize(CpuContext ctx)
+    {
+        var thisAddress = ctx[CpuRegister.Rdi];
+        var initParameterAddress = ctx[CpuRegister.Rsi];
+        if (thisAddress == 0)
+        {
+            ctx[CpuRegister.Rax] = unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        TraceJson("Initializer.initialize", thisAddress, initParameterAddress);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static void TraceJson(string operation, ulong thisAddress, ulong argument)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_JSON"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] json.{operation} this=0x{thisAddress:X16} arg=0x{argument:X16}");
+    }
+}

src/SharpEmu.Libs/Kernel/KernelAprCompatExports.cs

@@ -0,0 +1,247 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using SharpEmu.Libs.Ampr;
+using System.Collections.Concurrent;
+using System.Threading;
+
+namespace SharpEmu.Libs.Kernel;
+
+public static class KernelAprCompatExports
+{
+    private static readonly ConcurrentDictionary<uint, AprSubmission> _submittedCommandBuffers = new();
+    private static int _nextSubmissionId;
+    private static int _aprWaitTraceCount;
+    private static readonly bool _traceApr =
+        string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR"), "1", StringComparison.Ordinal);
+
+    private readonly record struct AprSubmission(ulong CommandBuffer, ulong Priority, ulong ResultAddress);
+
+    [SysAbiExport(
+        Nid = "ASoW5WE-UPo",
+        ExportName = "sceKernelAprSubmitCommandBufferAndGetResult",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAprSubmitCommandBufferAndGetResult(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var priority = ctx[CpuRegister.Rsi];
+        var resultAddress = ctx[CpuRegister.Rdx];
+        var outSubmissionId = ctx[CpuRegister.Rcx];
+
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var submissionId = unchecked((uint)Interlocked.Increment(ref _nextSubmissionId));
+        if (submissionId == 0)
+        {
+            submissionId = unchecked((uint)Interlocked.Increment(ref _nextSubmissionId));
+        }
+
+        _submittedCommandBuffers[submissionId] = new AprSubmission(commandBuffer, priority, resultAddress);
+
+        var completionResult = AmprExports.CompleteCommandBuffer(ctx, commandBuffer);
+        if (completionResult != (int)OrbisGen2Result.ORBIS_GEN2_OK)
+        {
+            return completionResult;
+        }
+
+        if (outSubmissionId != 0 && !ctx.TryWriteUInt32(outSubmissionId, submissionId))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (resultAddress != 0 && !TryWriteAprResult(ctx, resultAddress))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceApr(ctx, "submit_get_result", submissionId, commandBuffer, priority, resultAddress);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "rqwFKI4PAiM",
+        ExportName = "sceKernelAprWaitCommandBuffer",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAprWaitCommandBuffer(CpuContext ctx)
+    {
+        var submissionId = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var waitArg1 = ctx[CpuRegister.Rsi];
+        var waitArg2 = ctx[CpuRegister.Rdx];
+
+        if (!_submittedCommandBuffers.TryRemove(submissionId, out var submission))
+        {
+            TraceAprWaitFailure(ctx, "wait_missing", submissionId, commandBuffer: 0, waitArg1, waitArg2);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        }
+
+        var resultAddress = ResolveWaitResultAddress(waitArg1, waitArg2, submission.ResultAddress);
+        if (resultAddress != 0 && !TryWriteAprResult(ctx, resultAddress))
+        {
+            TraceAprWaitFailure(ctx, "wait_result_fault", submissionId, submission.CommandBuffer, waitArg1, waitArg2);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceApr(ctx, "wait", submissionId, submission.CommandBuffer, waitArg1, resultAddress);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "eE4Szl8sil8",
+        ExportName = "sceKernelAprSubmitCommandBuffer",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAprSubmitCommandBuffer(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        if (commandBuffer == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var submissionId = unchecked((uint)Interlocked.Increment(ref _nextSubmissionId));
+        _submittedCommandBuffers[submissionId] = new AprSubmission(commandBuffer, ctx[CpuRegister.Rsi], ResultAddress: 0);
+
+        var completionResult = AmprExports.CompleteCommandBuffer(ctx, commandBuffer);
+        if (completionResult != (int)OrbisGen2Result.ORBIS_GEN2_OK)
+        {
+            return completionResult;
+        }
+
+        TraceApr(ctx, "submit", submissionId, commandBuffer, ctx[CpuRegister.Rsi], 0);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "qvMUCyyaCSI",
+        ExportName = "sceKernelAprSubmitCommandBufferAndGetId",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAprSubmitCommandBufferAndGetId(CpuContext ctx)
+    {
+        var commandBuffer = ctx[CpuRegister.Rdi];
+        var outSubmissionId = ctx[CpuRegister.Rdx];
+        if (commandBuffer == 0 || outSubmissionId == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var submissionId = unchecked((uint)Interlocked.Increment(ref _nextSubmissionId));
+        _submittedCommandBuffers[submissionId] = new AprSubmission(commandBuffer, ctx[CpuRegister.Rsi], ResultAddress: 0);
+
+        var completionResult = AmprExports.CompleteCommandBuffer(ctx, commandBuffer);
+        if (completionResult != (int)OrbisGen2Result.ORBIS_GEN2_OK)
+        {
+            return completionResult;
+        }
+
+        if (!ctx.TryWriteUInt32(outSubmissionId, submissionId))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceApr(ctx, "submit_get_id", submissionId, commandBuffer, ctx[CpuRegister.Rsi], outSubmissionId);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static bool TryWriteAprResult(CpuContext ctx, ulong resultAddress)
+    {
+        Span<byte> result = stackalloc byte[sizeof(ulong)];
+        result.Clear();
+        return ctx.Memory.TryWrite(resultAddress, result);
+    }
+
+    private static ulong ResolveWaitResultAddress(ulong waitArg1, ulong waitArg2, ulong submittedResultAddress)
+    {
+        if (waitArg2 == 0)
+        {
+            return submittedResultAddress;
+        }
+
+        if (IsAmprCompletionToken(waitArg1) && waitArg2 <= 0xFFFF)
+        {
+            return submittedResultAddress;
+        }
+
+        return waitArg2;
+    }
+
+    private static bool IsAmprCompletionToken(ulong value)
+    {
+        var tag = value >> 56;
+        return tag is 0x0C or 0x10;
+    }
+
+    private static void TraceApr(
+        CpuContext ctx,
+        string operation,
+        uint submissionId,
+        ulong commandBuffer,
+        ulong priority,
+        ulong aux)
+    {
+        if (!_traceApr)
+        {
+            return;
+        }
+
+        var returnRip = 0UL;
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out returnRip);
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] apr.{operation}: id=0x{submissionId:X8} cmd=0x{commandBuffer:X16} priority=0x{priority:X16} aux=0x{aux:X16} ret=0x{returnRip:X16}");
+        if (aux != 0 &&
+            ctx.TryReadUInt64(aux, out var result0) &&
+            ctx.TryReadUInt64(aux + sizeof(ulong), out var result1))
+        {
+            Console.Error.WriteLine(
+                $"[LOADER][TRACE] apr.{operation}.result: addr=0x{aux:X16} q0=0x{result0:X16} q1=0x{result1:X16}");
+        }
+    }
+
+    private static void TraceAprWaitFailure(
+        CpuContext ctx,
+        string operation,
+        uint submissionId,
+        ulong commandBuffer,
+        ulong priority,
+        ulong resultAddress)
+    {
+        if (!_traceApr)
+        {
+            return;
+        }
+
+        var traceCount = Interlocked.Increment(ref _aprWaitTraceCount);
+        if (traceCount > 32 && (traceCount & 0x3FF) != 0)
+        {
+            return;
+        }
+
+        var returnRip = 0UL;
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out returnRip);
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] apr.{operation}: id=0x{submissionId:X8} cmd=0x{commandBuffer:X16} " +
+            $"rsi=0x{priority:X16} rdx=0x{resultAddress:X16} rcx=0x{ctx[CpuRegister.Rcx]:X16} " +
+            $"r8=0x{ctx[CpuRegister.R8]:X16} r9=0x{ctx[CpuRegister.R9]:X16} ret=0x{returnRip:X16}");
+        TraceReadableQword(ctx, operation, "rsi", priority);
+        TraceReadableQword(ctx, operation, "rdx", resultAddress);
+        TraceReadableQword(ctx, operation, "rcx", ctx[CpuRegister.Rcx]);
+        TraceReadableQword(ctx, operation, "r8", ctx[CpuRegister.R8]);
+    }
+
+    private static void TraceReadableQword(CpuContext ctx, string operation, string name, ulong address)
+    {
+        if (address == 0 || !ctx.TryReadUInt64(address, out var value))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] apr.{operation}.{name}: addr=0x{address:X16} q0=0x{value:X16}");
+    }
+}

src/SharpEmu.Libs/Kernel/KernelEventFlagCompatExports.cs

@@ -0,0 +1,566 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Collections.Concurrent;
+using System.Text;
+using SharpEmu.HLE;
+using SharpEmu.Libs.Fiber;
+
+namespace SharpEmu.Libs.Kernel;
+
+public static class KernelEventFlagCompatExports
+{
+    private const int MaxEventFlagNameLength = 31;
+    private const int HostWaitPumpMilliseconds = 1;
+    private const uint AttrThreadFifo = 0x01;
+    private const uint AttrThreadPriority = 0x02;
+    private const uint AttrSingle = 0x10;
+    private const uint AttrMulti = 0x20;
+    private const uint WaitAnd = 0x01;
+    private const uint WaitOr = 0x02;
+    private const uint ClearAll = 0x10;
+    private const uint ClearPattern = 0x20;
+
+    private static readonly ConcurrentDictionary<ulong, EventFlagState> _eventFlags = new();
+    private static long _nextEventFlagHandle = 1;
+
+    private sealed class EventFlagState
+    {
+        public required string Name { get; init; }
+        public required uint Attributes { get; init; }
+        public ulong Bits { get; set; }
+        public int WaitingThreads { get; set; }
+        public object Gate { get; } = new();
+    }
+
+    [SysAbiExport(
+        Nid = "BpFoboUJoZU",
+        ExportName = "sceKernelCreateEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelCreateEventFlag(CpuContext ctx)
+    {
+        var outAddress = ctx[CpuRegister.Rdi];
+        var nameAddress = ctx[CpuRegister.Rsi];
+        var attributes = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var initialPattern = ctx[CpuRegister.Rcx];
+        var optionAddress = ctx[CpuRegister.R8];
+
+        if (outAddress == 0 ||
+            nameAddress == 0 ||
+            optionAddress != 0 ||
+            !IsValidAttributes(attributes))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxEventFlagNameLength + 1, out var name))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        if (Encoding.UTF8.GetByteCount(name) > MaxEventFlagNameLength)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = unchecked((ulong)Interlocked.Increment(ref _nextEventFlagHandle));
+        _eventFlags[handle] = new EventFlagState
+        {
+            Name = name,
+            Attributes = attributes,
+            Bits = initialPattern,
+        };
+
+        if (!ctx.TryWriteUInt64(outAddress, handle))
+        {
+            _eventFlags.TryRemove(handle, out _);
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceEventFlag($"create handle=0x{handle:X16} name='{name}' attr=0x{attributes:X2} bits=0x{initialPattern:X16}");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "8mql9OcQnd4",
+        ExportName = "sceKernelDeleteEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        if (!_eventFlags.TryRemove(handle, out var state))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            Monitor.PulseAll(state.Gate);
+        }
+
+        TraceEventFlag($"delete handle=0x{handle:X16} name='{state.Name}'");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "IOnSvHzqu6A",
+        ExportName = "sceKernelSetEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelSetEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var pattern = ctx[CpuRegister.Rsi];
+        var returnRip = GetCurrentReturnRip();
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            state.Bits |= pattern;
+            Monitor.PulseAll(state.Gate);
+            TraceEventFlag($"set handle=0x{handle:X16} pattern=0x{pattern:X16} bits=0x{state.Bits:X16} ret=0x{returnRip:X16}");
+        }
+
+        _ = GuestThreadExecution.Scheduler?.WakeBlockedThreads(GetEventFlagWakeKey(handle));
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "7uhBFWRAS60",
+        ExportName = "sceKernelClearEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelClearEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var pattern = ctx[CpuRegister.Rsi];
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            state.Bits &= pattern;
+            TraceEventFlag($"clear handle=0x{handle:X16} mask=0x{pattern:X16} bits=0x{state.Bits:X16}");
+        }
+
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "9lvj5DjHZiA",
+        ExportName = "sceKernelPollEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelPollEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var pattern = ctx[CpuRegister.Rsi];
+        var waitMode = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var resultAddress = ctx[CpuRegister.Rcx];
+
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (pattern == 0 || !IsValidWaitMode(waitMode))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (state.Gate)
+        {
+            if (!TryWriteResultPattern(ctx, resultAddress, state.Bits))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            if (!IsSatisfied(state.Bits, pattern, waitMode))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY);
+            }
+
+            ApplyClearMode(state, pattern, waitMode);
+            TraceEventFlag($"poll handle=0x{handle:X16} pattern=0x{pattern:X16} mode=0x{waitMode:X2} bits=0x{state.Bits:X16}");
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "JTvBflhYazQ",
+        ExportName = "sceKernelWaitEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelWaitEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var pattern = ctx[CpuRegister.Rsi];
+        var waitMode = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var resultAddress = ctx[CpuRegister.Rcx];
+        var timeoutAddress = ctx[CpuRegister.R8];
+        var returnRip = GetCurrentReturnRip();
+
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (pattern == 0 || !IsValidWaitMode(waitMode))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        uint timeoutUsec = 0;
+        if (timeoutAddress != 0 && !ctx.TryReadUInt32(timeoutAddress, out timeoutUsec))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        Monitor.Enter(state.Gate);
+        try
+        {
+            if (TryCompleteSatisfiedWait(ctx, state, pattern, waitMode, resultAddress, out var immediateWaitResult))
+            {
+                return SetReturn(ctx, immediateWaitResult);
+            }
+
+            if (timeoutAddress != 0)
+            {
+                _ = ctx.TryWriteUInt32(timeoutAddress, 0);
+                _ = TryWriteResultPattern(ctx, resultAddress, state.Bits);
+                TraceEventFlag($"wait-timeout handle=0x{handle:X16} pattern=0x{pattern:X16} timeout={timeoutUsec} ret=0x{returnRip:X16}");
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT);
+            }
+
+            var currentGuestThread = GuestThreadExecution.CurrentGuestThreadHandle;
+            var currentFiber = FiberExports.GetCurrentFiberAddressForDiagnostics(ctx);
+            var managedThread = Environment.CurrentManagedThreadId;
+            var blockedWaitResult = OrbisGen2Result.ORBIS_GEN2_OK;
+            var requestedBlock = GuestThreadExecution.RequestCurrentThreadBlock(
+                ctx,
+                "sceKernelWaitEventFlag",
+                GetEventFlagWakeKey(handle),
+                () => (int)blockedWaitResult,
+                () =>
+                {
+                    if (!TryPrepareBlockedWait(
+                            ctx,
+                            state,
+                            pattern,
+                            waitMode,
+                            resultAddress,
+                            out var preparedResult))
+                    {
+                        return false;
+                    }
+
+                    blockedWaitResult = preparedResult;
+                    return true;
+                });
+            TraceEventFlag($"wait-unsatisfied handle=0x{handle:X16} pattern=0x{pattern:X16} bits=0x{state.Bits:X16} guest_thread=0x{currentGuestThread:X16} fiber=0x{currentFiber:X16} managed={managedThread} block={requestedBlock} ret=0x{returnRip:X16} frames={FormatFrameChain(ctx)}");
+            TraceEventFlag($"wait-object handle=0x{handle:X16} name='{state.Name}' {FormatGuestWaitObject(ctx)}");
+            if (!requestedBlock)
+            {
+                var scheduler = GuestThreadExecution.Scheduler;
+                if (scheduler is null)
+                {
+                    return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN);
+                }
+
+                state.WaitingThreads++;
+                TraceEventFlag($"wait-pump handle=0x{handle:X16} pattern=0x{pattern:X16} waiters={state.WaitingThreads} guest_thread=0x{currentGuestThread:X16} fiber=0x{currentFiber:X16} managed={managedThread} ret=0x{returnRip:X16}");
+                var releaseWaiter = true;
+                try
+                {
+                    while (true)
+                    {
+                        Monitor.Exit(state.Gate);
+                        try
+                        {
+                            scheduler.Pump(ctx, "sceKernelWaitEventFlag");
+                        }
+                        finally
+                        {
+                            Monitor.Enter(state.Gate);
+                        }
+
+                        if (TryCompleteSatisfiedWait(ctx, state, pattern, waitMode, resultAddress, out var pumpedWaitResult))
+                        {
+                            state.WaitingThreads = Math.Max(0, state.WaitingThreads - 1);
+                            releaseWaiter = false;
+                            TraceEventFlag($"wait-wake handle=0x{handle:X16} pattern=0x{pattern:X16} bits=0x{state.Bits:X16} waiters={state.WaitingThreads} ret=0x{returnRip:X16}");
+                            return SetReturn(ctx, pumpedWaitResult);
+                        }
+
+                        Monitor.Wait(state.Gate, HostWaitPumpMilliseconds);
+                    }
+                }
+                finally
+                {
+                    if (releaseWaiter)
+                    {
+                        state.WaitingThreads = Math.Max(0, state.WaitingThreads - 1);
+                    }
+                }
+            }
+
+            state.WaitingThreads++;
+            TraceEventFlag($"wait-block handle=0x{handle:X16} pattern=0x{pattern:X16} waiters={state.WaitingThreads} guest_thread=0x{currentGuestThread:X16} fiber=0x{currentFiber:X16} managed={managedThread} ret=0x{returnRip:X16}");
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+        finally
+        {
+            Monitor.Exit(state.Gate);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "PZku4ZrXJqg",
+        ExportName = "sceKernelCancelEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelCancelEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var setPattern = ctx[CpuRegister.Rsi];
+        var waiterCountAddress = ctx[CpuRegister.Rdx];
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            if (waiterCountAddress != 0 &&
+                !ctx.TryWriteUInt32(waiterCountAddress, unchecked((uint)state.WaitingThreads)))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            state.Bits = setPattern;
+            state.WaitingThreads = 0;
+            Monitor.PulseAll(state.Gate);
+            TraceEventFlag($"cancel handle=0x{handle:X16} bits=0x{setPattern:X16}");
+        }
+
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static bool IsValidAttributes(uint attributes)
+    {
+        var queueMode = attributes & 0x0F;
+        var threadMode = attributes & 0xF0;
+        return (queueMode is 0 or AttrThreadFifo or AttrThreadPriority) &&
+            (threadMode is 0 or AttrSingle or AttrMulti) &&
+            (attributes & ~0x33u) == 0;
+    }
+
+    private static bool IsValidWaitMode(uint waitMode)
+    {
+        var condition = waitMode & 0x0F;
+        var clearMode = waitMode & 0xF0;
+        return condition is WaitAnd or WaitOr &&
+            clearMode is 0 or ClearAll or ClearPattern &&
+            (waitMode & ~0x33u) == 0;
+    }
+
+    private static bool IsSatisfied(ulong bits, ulong pattern, uint waitMode) =>
+        (waitMode & 0x0F) == WaitAnd
+            ? (bits & pattern) == pattern
+            : (bits & pattern) != 0;
+
+    private static void ApplyClearMode(EventFlagState state, ulong pattern, uint waitMode)
+    {
+        switch (waitMode & 0xF0)
+        {
+            case ClearAll:
+                state.Bits = 0;
+                break;
+            case ClearPattern:
+                state.Bits &= ~pattern;
+                break;
+        }
+    }
+
+    private static bool TryCompleteSatisfiedWait(
+    CpuContext ctx,
+    EventFlagState state,
+    ulong pattern,
+    uint waitMode,
+    ulong resultAddress,
+    out OrbisGen2Result result)
+    {
+        result = OrbisGen2Result.ORBIS_GEN2_OK;
+
+        if (!IsSatisfied(state.Bits, pattern, waitMode))
+        {
+            return false;
+        }
+
+        if (!TryWriteResultPattern(ctx, resultAddress, state.Bits))
+        {
+            result = OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            return true;
+        }
+
+        ApplyClearMode(state, pattern, waitMode);
+        return true;
+    }
+
+    private static bool TryPrepareBlockedWait(
+        CpuContext ctx,
+        EventFlagState state,
+        ulong pattern,
+        uint waitMode,
+        ulong resultAddress,
+        out OrbisGen2Result result)
+    {
+        lock (state.Gate)
+        {
+            result = OrbisGen2Result.ORBIS_GEN2_OK;
+            if (!IsSatisfied(state.Bits, pattern, waitMode))
+            {
+                return false;
+            }
+
+            if (!TryWriteResultPattern(ctx, resultAddress, state.Bits))
+            {
+                result = OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+            else
+            {
+                ApplyClearMode(state, pattern, waitMode);
+            }
+
+            state.WaitingThreads = Math.Max(0, state.WaitingThreads - 1);
+            TraceEventFlag(
+                $"wait-wake pattern=0x{pattern:X16} mode=0x{waitMode:X2} bits=0x{state.Bits:X16} waiters={state.WaitingThreads}");
+            return true;
+        }
+    }
+
+    private static string GetEventFlagWakeKey(ulong handle) =>
+        $"event_flag:0x{handle:X16}";
+
+    private static bool TryWriteResultPattern(CpuContext ctx, ulong address, ulong bits) =>
+        address == 0 || ctx.TryWriteUInt64(address, bits);
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        var value = (int)result;
+        ctx[CpuRegister.Rax] = unchecked((ulong)value);
+        return value;
+    }
+
+    private static void TraceEventFlag(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_EVENT_FLAG"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] event_flag.{message}");
+        }
+    }
+
+    private static ulong GetCurrentReturnRip() =>
+        GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame)
+            ? frame.ReturnRip
+            : 0UL;
+
+    private static string FormatFrameChain(CpuContext ctx)
+    {
+        Span<ulong> returns = stackalloc ulong[4];
+        var count = 0;
+        var frame = ctx[CpuRegister.Rbp];
+        for (var index = 0; index < returns.Length && frame != 0; index++)
+        {
+            if (!ctx.TryReadUInt64(frame, out var nextFrame) ||
+                !ctx.TryReadUInt64(frame + sizeof(ulong), out var returnAddress))
+            {
+                break;
+            }
+
+            returns[count++] = returnAddress;
+            if (nextFrame <= frame)
+            {
+                break;
+            }
+
+            frame = nextFrame;
+        }
+
+        return count switch
+        {
+            0 => "none",
+            1 => $"0x{returns[0]:X16}",
+            2 => $"0x{returns[0]:X16},0x{returns[1]:X16}",
+            3 => $"0x{returns[0]:X16},0x{returns[1]:X16},0x{returns[2]:X16}",
+            _ => $"0x{returns[0]:X16},0x{returns[1]:X16},0x{returns[2]:X16},0x{returns[3]:X16}",
+        };
+    }
+
+    private static string FormatGuestWaitObject(CpuContext ctx)
+    {
+        var r12 = ctx[CpuRegister.R12];
+        var r13 = ctx[CpuRegister.R13];
+        var objectAddress = r12 != 0
+            ? r12
+            : r13 >= 0xA8
+                ? r13 - 0xA8
+                : 0;
+
+        var builder = new StringBuilder(256);
+        builder.Append($"r12=0x{r12:X16} r13=0x{r13:X16}");
+        if (objectAddress == 0)
+        {
+            return builder.ToString();
+        }
+
+        builder.Append($" obj=0x{objectAddress:X16}");
+        AppendUInt32(builder, ctx, objectAddress + 0x58, "o58");
+        AppendUInt32(builder, ctx, objectAddress + 0x5C, "o5C");
+        AppendUInt64(builder, ctx, objectAddress + 0x60, "o60");
+        AppendByte(builder, ctx, objectAddress + 0x6C, "state6C");
+        AppendByte(builder, ctx, objectAddress + 0x6D, "o6D");
+        AppendByte(builder, ctx, objectAddress + 0xA0, "waitA0");
+        AppendByte(builder, ctx, objectAddress + 0xA1, "stateA1");
+        AppendByte(builder, ctx, objectAddress + 0xA2, "oA2");
+        AppendUInt64(builder, ctx, objectAddress + 0xA8, "eventA8");
+        if (r13 != 0)
+        {
+            AppendUInt64(builder, ctx, r13, "r13_0");
+            AppendUInt64(builder, ctx, r13 + 8, "r13_8");
+        }
+
+        return builder.ToString();
+    }
+
+    private static void AppendByte(StringBuilder builder, CpuContext ctx, ulong address, string name)
+    {
+        if (ctx.TryReadByte(address, out var value))
+        {
+            builder.Append($" {name}=0x{value:X2}");
+        }
+    }
+
+    private static void AppendUInt32(StringBuilder builder, CpuContext ctx, ulong address, string name)
+    {
+        if (ctx.TryReadUInt32(address, out var value))
+        {
+            builder.Append($" {name}=0x{value:X8}");
+        }
+    }
+
+    private static void AppendUInt64(StringBuilder builder, CpuContext ctx, ulong address, string name)
+    {
+        if (ctx.TryReadUInt64(address, out var value))
+        {
+            builder.Append($" {name}=0x{value:X16}");
+        }
+    }
+}

src/SharpEmu.Libs/Kernel/KernelEventQueueCompatExports.cs

@@ -0,0 +1,661 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Threading;
+
+namespace SharpEmu.Libs.Kernel;
+
+public static class KernelEventQueueCompatExports
+{
+    private const int KernelEventSize = 0x20;
+    public const short KernelEventFilterGraphics = -14;
+    public const short KernelEventFilterAmpr = -16;
+    public const short KernelEventFilterAmprSystem = -17;
+
+    private static readonly object _eventQueueGate = new();
+    private static readonly HashSet<ulong> _eventQueues = new();
+    private static readonly Dictionary<ulong, LinkedList<KernelQueuedEvent>> _pendingEvents = new();
+    private static readonly Dictionary<ulong, Dictionary<(ulong Ident, short Filter), KernelEventRegistration>> _registeredEvents = new();
+    private static long _nextEventQueueHandle = 1;
+
+    public readonly record struct KernelQueuedEvent(
+        ulong Ident,
+        short Filter,
+        ushort Flags,
+        uint Fflags,
+        ulong Data,
+        ulong UserData);
+
+    private readonly record struct KernelEventRegistration(
+        ulong Ident,
+        short Filter,
+        ulong UserData);
+
+    [SysAbiExport(
+        Nid = "D0OdFMjp46I",
+        ExportName = "sceKernelCreateEqueue",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelCreateEqueue(CpuContext ctx)
+    {
+        var outAddress = ctx[CpuRegister.Rdi];
+        if (outAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var handle = unchecked((ulong)Interlocked.Increment(ref _nextEventQueueHandle));
+        lock (_eventQueueGate)
+        {
+            _eventQueues.Add(handle);
+            _pendingEvents[handle] = new LinkedList<KernelQueuedEvent>();
+            _registeredEvents[handle] = new Dictionary<(ulong Ident, short Filter), KernelEventRegistration>();
+        }
+
+        if (!ctx.TryWriteUInt64(outAddress, handle))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceEventQueue(ctx, "create", handle);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "jpFjmgAC5AE",
+        ExportName = "sceKernelDeleteEqueue",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteEqueue(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        lock (_eventQueueGate)
+        {
+            _eventQueues.Remove(handle);
+            _pendingEvents.Remove(handle);
+            _registeredEvents.Remove(handle);
+        }
+
+        TraceEventQueue(ctx, "delete", handle);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "WDszmSbWuDk",
+        ExportName = "sceKernelAddUserEventEdge",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAddUserEventEdge(CpuContext ctx)
+    {
+        TraceEventQueue(ctx, "add_user_edge", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "4R6-OvI2cEA",
+        ExportName = "sceKernelAddUserEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAddUserEvent(CpuContext ctx)
+    {
+        TraceEventQueue(ctx, "add_user", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "LJDwdSNTnDg",
+        ExportName = "sceKernelDeleteUserEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteUserEvent(CpuContext ctx)
+    {
+        TraceEventQueue(ctx, "delete_user", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "F6e0kwo4cnk",
+        ExportName = "sceKernelTriggerUserEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelTriggerUserEvent(CpuContext ctx)
+    {
+        TraceEventQueue(ctx, "trigger_user", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "bBfz7kMF2Ho",
+        ExportName = "sceKernelAddAmprEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAddAmprEvent(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var registered = RegisterEvent(
+            handle,
+            unchecked((uint)ctx[CpuRegister.Rsi]),
+            KernelEventFilterAmpr,
+            ctx[CpuRegister.Rdx]);
+        TraceEventQueue(ctx, "add_ampr", handle);
+        return registered
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+    }
+
+    [SysAbiExport(
+        Nid = "vuae5JPNt9A",
+        ExportName = "sceKernelAddAmprSystemEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAddAmprSystemEvent(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var registered = RegisterEvent(
+            handle,
+            unchecked((uint)ctx[CpuRegister.Rsi]),
+            KernelEventFilterAmprSystem,
+            ctx[CpuRegister.Rdx]);
+        TraceEventQueue(ctx, "add_ampr_system", handle);
+        return registered
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+    }
+
+    [SysAbiExport(
+        Nid = "bMmid3pfyjo",
+        ExportName = "sceKernelDeleteAmprEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteAmprEvent(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var deleted = DeleteRegisteredEvent(
+            handle,
+            unchecked((uint)ctx[CpuRegister.Rsi]),
+            KernelEventFilterAmpr);
+        TraceEventQueue(ctx, "delete_ampr", handle);
+        return deleted
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+    }
+
+    [SysAbiExport(
+        Nid = "Ij+ryuEClXQ",
+        ExportName = "sceKernelDeleteAmprSystemEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteAmprSystemEvent(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var deleted = DeleteRegisteredEvent(
+            handle,
+            unchecked((uint)ctx[CpuRegister.Rsi]),
+            KernelEventFilterAmprSystem);
+        TraceEventQueue(ctx, "delete_ampr_system", handle);
+        return deleted
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+    }
+
+    [SysAbiExport(
+        Nid = "QyrxcdBrb0M",
+        ExportName = "sceKernelGetKqueueFromEqueue",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelGetKqueueFromEqueue(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = ctx[CpuRegister.Rdi];
+        TraceEventQueue(ctx, "get_kqueue", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "vz+pg2zdopI",
+        ExportName = "sceKernelGetEventUserData",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelGetEventUserData(CpuContext ctx)
+    {
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rdi] + 0x18, out var userData);
+        ctx[CpuRegister.Rax] = userData;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "mJ7aghmgvfc",
+        ExportName = "sceKernelGetEventId",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelGetEventId(CpuContext ctx)
+    {
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rdi], out var ident);
+        ctx[CpuRegister.Rax] = ident;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "23CPPI1tyBY",
+        ExportName = "sceKernelGetEventFilter",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelGetEventFilter(CpuContext ctx)
+    {
+        Span<byte> filterBytes = stackalloc byte[sizeof(short)];
+        var filter = ctx.Memory.TryRead(ctx[CpuRegister.Rdi] + 0x08, filterBytes)
+            ? BinaryPrimitives.ReadInt16LittleEndian(filterBytes)
+            : (short)0;
+        ctx[CpuRegister.Rax] = unchecked((uint)filter);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "kwGyyjohI50",
+        ExportName = "sceKernelGetEventData",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelGetEventData(CpuContext ctx)
+    {
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rdi] + 0x10, out var data);
+        ctx[CpuRegister.Rax] = data;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "fzyMKs9kim0",
+        ExportName = "sceKernelWaitEqueue",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelWaitEqueue(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var eventsAddress = ctx[CpuRegister.Rsi];
+        var eventCapacity = (int)Math.Min(ctx[CpuRegister.Rdx], int.MaxValue);
+        var outCountAddress = ctx[CpuRegister.Rcx];
+        var timeoutAddress = ctx[CpuRegister.R8];
+
+        if (!IsValidEqueue(handle))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        }
+
+        if (eventsAddress == 0 || eventCapacity < 1)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        uint timeoutUsec = 0;
+        if (timeoutAddress != 0 && !ctx.TryReadUInt32(timeoutAddress, out timeoutUsec))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        var deliveredCount = DequeueEvents(ctx, handle, eventsAddress, eventCapacity);
+        if (outCountAddress != 0 && !ctx.TryWriteUInt32(outCountAddress, (uint)deliveredCount))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (deliveredCount > 0)
+        {
+            TraceEventQueue(ctx, "wait-deliver", handle);
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (timeoutAddress == 0 &&
+            GuestThreadExecution.RequestCurrentThreadBlock(
+                ctx,
+                "sceKernelWaitEqueue",
+                GetEventQueueWakeKey(handle),
+                () => ResumeWaitEqueue(ctx, handle, eventsAddress, eventCapacity, outCountAddress),
+                () => HasPendingEvents(handle)))
+        {
+            TraceEventQueue(ctx, "wait-block", handle);
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (timeoutAddress != 0 && ctx.TryReadUInt64(timeoutAddress, out var timeoutRaw))
+        {
+            var timeoutMicros = timeoutRaw & 0xFFFF_FFFFUL;
+            var deadline = Environment.TickCount64 +
+                Math.Max(1L, (long)Math.Min(timeoutMicros / 1000, int.MaxValue));
+            lock (_eventQueueGate)
+            {
+                while (!HasPendingEvents(handle))
+                {
+                    var remaining = deadline - Environment.TickCount64;
+                    if (remaining <= 0)
+                    {
+                        break;
+                    }
+
+                    Monitor.Wait(_eventQueueGate, (int)Math.Min(remaining, 100));
+                }
+            }
+
+            deliveredCount = DequeueEvents(ctx, handle, eventsAddress, eventCapacity);
+            if (outCountAddress != 0 && !ctx.TryWriteUInt32(outCountAddress, (uint)deliveredCount))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+
+            if (deliveredCount > 0)
+            {
+                TraceEventQueue(ctx, "wait-timed-deliver", handle);
+                return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+            }
+
+            TraceEventQueue(ctx, "wait-timeout", handle);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT;
+        }
+
+        TraceEventQueue(ctx, "wait", handle);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    public static bool IsValidEqueue(ulong handle)
+    {
+        lock (_eventQueueGate)
+        {
+            return _eventQueues.Contains(handle);
+        }
+    }
+
+    public static bool EnqueueEvent(ulong handle, KernelQueuedEvent queuedEvent)
+    {
+        var queued = false;
+        lock (_eventQueueGate)
+        {
+            if (!_eventQueues.Contains(handle))
+            {
+                return false;
+            }
+
+            if (!_pendingEvents.TryGetValue(handle, out var queue))
+            {
+                queue = new LinkedList<KernelQueuedEvent>();
+                _pendingEvents[handle] = queue;
+            }
+
+            queue.AddLast(queuedEvent);
+            queued = true;
+            Monitor.PulseAll(_eventQueueGate);
+        }
+
+        if (queued)
+        {
+            WakeEventQueue(handle);
+        }
+
+        return queued;
+    }
+
+    public static bool RegisterEvent(
+        ulong handle,
+        ulong ident,
+        short filter,
+        ulong userData)
+    {
+        lock (_eventQueueGate)
+        {
+            if (!_eventQueues.Contains(handle))
+            {
+                return false;
+            }
+
+            if (!_registeredEvents.TryGetValue(handle, out var events))
+            {
+                events = new Dictionary<(ulong Ident, short Filter), KernelEventRegistration>();
+                _registeredEvents[handle] = events;
+            }
+
+            events[(ident, filter)] = new KernelEventRegistration(ident, filter, userData);
+            return true;
+        }
+    }
+
+    public static bool DeleteRegisteredEvent(
+        ulong handle,
+        ulong ident,
+        short filter)
+    {
+        lock (_eventQueueGate)
+        {
+            return _registeredEvents.TryGetValue(handle, out var events) &&
+                   events.Remove((ident, filter));
+        }
+    }
+
+    public static int TriggerRegisteredEvents(
+        ulong ident,
+        short filter,
+        ulong data)
+    {
+        List<ulong>? wakeHandles = null;
+        var triggeredCount = 0;
+        lock (_eventQueueGate)
+        {
+            foreach (var (handle, registrations) in _registeredEvents)
+            {
+                if (!registrations.TryGetValue((ident, filter), out var registration))
+                {
+                    continue;
+                }
+
+                if (!_pendingEvents.TryGetValue(handle, out var queue))
+                {
+                    queue = new LinkedList<KernelQueuedEvent>();
+                    _pendingEvents[handle] = queue;
+                }
+
+                QueueOrUpdateEvent(
+                    queue,
+                    new KernelQueuedEvent(
+                        registration.Ident,
+                        registration.Filter,
+                        0,
+                        1,
+                        data,
+                        registration.UserData));
+                (wakeHandles ??= new List<ulong>()).Add(handle);
+                triggeredCount++;
+            }
+        }
+
+        if (wakeHandles is not null)
+        {
+            foreach (var handle in wakeHandles)
+            {
+                WakeEventQueue(handle);
+            }
+        }
+
+        return triggeredCount;
+    }
+
+    public static bool TriggerDisplayEvent(
+        ulong handle,
+        ulong ident,
+        short filter,
+        ulong eventHint,
+        ulong userData)
+    {
+        var triggered = false;
+        lock (_eventQueueGate)
+        {
+            if (!_eventQueues.Contains(handle))
+            {
+                return false;
+            }
+
+            if (!_pendingEvents.TryGetValue(handle, out var events))
+            {
+                events = new LinkedList<KernelQueuedEvent>();
+                _pendingEvents[handle] = events;
+            }
+
+            var count = 1UL;
+            var pendingNode = FindPendingEvent(events, ident, filter);
+            if (pendingNode is not null)
+            {
+                count = Math.Min(((pendingNode.Value.Data >> 12) & 0xFUL) + 1, 0xFUL);
+            }
+
+            var timeBits = unchecked((ulong)Environment.TickCount64) & 0xFFFUL;
+            var eventData = timeBits | (count << 12) | (eventHint & 0xFFFF_FFFF_FFFF_0000UL);
+            var triggeredEvent = new KernelQueuedEvent(
+                ident,
+                filter,
+                0x20,
+                0,
+                eventData,
+                userData);
+
+            if (pendingNode is not null)
+            {
+                pendingNode.Value = triggeredEvent;
+            }
+            else
+            {
+                events.AddLast(triggeredEvent);
+            }
+
+            triggered = true;
+        }
+
+        if (triggered)
+        {
+            WakeEventQueue(handle);
+        }
+
+        return triggered;
+    }
+
+    private static int ResumeWaitEqueue(
+        CpuContext ctx,
+        ulong handle,
+        ulong eventsAddress,
+        int eventCapacity,
+        ulong outCountAddress)
+    {
+        var deliveredCount = DequeueEvents(ctx, handle, eventsAddress, eventCapacity);
+        if (outCountAddress != 0 && !ctx.TryWriteUInt32(outCountAddress, (uint)deliveredCount))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        return deliveredCount > 0
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT;
+    }
+
+    private static bool HasPendingEvents(ulong handle)
+    {
+        lock (_eventQueueGate)
+        {
+            return _pendingEvents.TryGetValue(handle, out var events) && events.Count != 0;
+        }
+    }
+
+    private static void QueueOrUpdateEvent(
+        LinkedList<KernelQueuedEvent> queue,
+        KernelQueuedEvent queuedEvent)
+    {
+        var pendingNode = FindPendingEvent(queue, queuedEvent.Ident, queuedEvent.Filter);
+        if (pendingNode is null)
+        {
+            queue.AddLast(queuedEvent);
+            return;
+        }
+
+        pendingNode.Value = queuedEvent with
+        {
+            Fflags = Math.Max(pendingNode.Value.Fflags + 1, queuedEvent.Fflags),
+        };
+    }
+
+    private static LinkedListNode<KernelQueuedEvent>? FindPendingEvent(
+        LinkedList<KernelQueuedEvent> queue,
+        ulong ident,
+        short filter)
+    {
+        for (var node = queue.First; node is not null; node = node.Next)
+        {
+            if (node.Value.Ident == ident && node.Value.Filter == filter)
+            {
+                return node;
+            }
+        }
+
+        return null;
+    }
+
+    private static string GetEventQueueWakeKey(ulong handle) =>
+        $"sceKernelWaitEqueue:{handle:X16}";
+
+    private static void WakeEventQueue(ulong handle)
+    {
+        _ = GuestThreadExecution.Scheduler?.WakeBlockedThreads(GetEventQueueWakeKey(handle));
+    }
+
+    private static int DequeueEvents(CpuContext ctx, ulong handle, ulong eventsAddress, int eventCapacity)
+    {
+        if (eventsAddress == 0 || eventCapacity <= 0)
+        {
+            return 0;
+        }
+
+        KernelQueuedEvent[] events;
+        lock (_eventQueueGate)
+        {
+            if (!_pendingEvents.TryGetValue(handle, out var queue) || queue.Count == 0)
+            {
+                return 0;
+            }
+
+            var count = Math.Min(eventCapacity, queue.Count);
+            events = new KernelQueuedEvent[count];
+            for (var i = 0; i < count; i++)
+            {
+                events[i] = queue.First!.Value;
+                queue.RemoveFirst();
+            }
+        }
+
+        for (var i = 0; i < events.Length; i++)
+        {
+            if (!WriteKernelEvent(ctx, eventsAddress + ((ulong)i * KernelEventSize), events[i]))
+            {
+                return i;
+            }
+        }
+
+        return events.Length;
+    }
+
+    private static bool WriteKernelEvent(CpuContext ctx, ulong address, KernelQueuedEvent queuedEvent)
+    {
+        Span<byte> eventBytes = stackalloc byte[KernelEventSize];
+        BinaryPrimitives.WriteUInt64LittleEndian(eventBytes[0x00..], queuedEvent.Ident);
+        BinaryPrimitives.WriteInt16LittleEndian(eventBytes[0x08..], queuedEvent.Filter);
+        BinaryPrimitives.WriteUInt16LittleEndian(eventBytes[0x0A..], queuedEvent.Flags);
+        BinaryPrimitives.WriteUInt32LittleEndian(eventBytes[0x0C..], queuedEvent.Fflags);
+        BinaryPrimitives.WriteUInt64LittleEndian(eventBytes[0x10..], queuedEvent.Data);
+        BinaryPrimitives.WriteUInt64LittleEndian(eventBytes[0x18..], queuedEvent.UserData);
+        return ctx.Memory.TryWrite(address, eventBytes);
+    }
+
+    private static void TraceEventQueue(CpuContext ctx, string operation, ulong handle)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_EQUEUE"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out ulong returnRip);
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] equeue.{operation}: handle=0x{handle:X16} rsi=0x{ctx[CpuRegister.Rsi]:X16} rdx=0x{ctx[CpuRegister.Rdx]:X16} ret=0x{returnRip:X16}");
+    }
+}

src/SharpEmu.Libs/Kernel/KernelExceptionCompatExports.cs

@@ -0,0 +1,65 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Kernel;
+
+public static class KernelExceptionCompatExports
+{
+    private static readonly HashSet<int> AllowedSignals = new() { 1, 4, 8, 10, 11, 30 };
+    private static readonly Dictionary<int, ulong> _installedHandlers = new();
+    private static readonly object _gate = new();
+
+    [SysAbiExport(
+        Nid = "WkwEd3N7w0Y",
+        ExportName = "sceKernelInstallExceptionHandler",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int InstallExceptionHandler(CpuContext ctx)
+    {
+        var signum = unchecked((int)ctx[CpuRegister.Rdi]);
+        var handler = ctx[CpuRegister.Rsi];
+
+        if (!AllowedSignals.Contains(signum))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        lock (_gate)
+        {
+            if (_installedHandlers.ContainsKey(signum))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_ALREADY_EXISTS;
+            }
+
+            _installedHandlers[signum] = handler;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "Qhv5ARAoOEc",
+        ExportName = "sceKernelRemoveExceptionHandler",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int RemoveExceptionHandler(CpuContext ctx)
+    {
+        var signum = unchecked((int)ctx[CpuRegister.Rdi]);
+
+        if (!AllowedSignals.Contains(signum))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        lock (_gate)
+        {
+            _installedHandlers.Remove(signum);
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+}

src/SharpEmu.Libs/Kernel/KernelExports.cs

@@ -55,7 +55,10 @@ public static class KernelExports
         LibraryName = "libKernel")]
     public static int Exit(CpuContext ctx)
     {
-        _ = ctx;
+        var status = unchecked((int)ctx[CpuRegister.Rdi]);
+        Console.Error.WriteLine($"[LOADER][INFO] exit(status={status})");
+        GuestThreadExecution.RequestCurrentEntryExit("exit", status);
+        ctx[CpuRegister.Rax] = unchecked((ulong)status);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -68,7 +71,8 @@ public static class KernelExports
     {
         var status = unchecked((int)ctx[CpuRegister.Rdi]);
         Console.Error.WriteLine($"[LOADER][INFO] catchReturnFromMain(status={status})");
-        ctx[CpuRegister.Rax] = 0;
+        GuestThreadExecution.RequestCurrentEntryExit("catchReturnFromMain", status);
+        ctx[CpuRegister.Rax] = unchecked((ulong)status);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -200,6 +204,16 @@ public static class KernelExports
         var nameAddress = ctx[CpuRegister.R8];
         var name = nameAddress == 0 ? string.Empty : ReadCString(ctx, nameAddress, 256);
         var threadHandle = KernelPthreadState.CreateThreadHandle(name);
+        KernelPthreadExtendedCompatExports.GetThreadStartScheduling(
+            ctx,
+            attrAddress,
+            out var priority,
+            out var affinityMask);
+        KernelPthreadExtendedCompatExports.RegisterThreadStart(
+            threadHandle,
+            name,
+            priority,
+            affinityMask);
         if (threadIdAddress != 0 && !ctx.TryWriteUInt64(threadIdAddress, threadHandle))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -208,7 +222,29 @@ public static class KernelExports
         if (ShouldTracePthread())
         {
             Console.Error.WriteLine(
-                $"[LOADER][TRACE] pthread_create: out=0x{threadIdAddress:X16} attr=0x{attrAddress:X16} entry=0x{entryAddress:X16} arg=0x{argument:X16} name_ptr=0x{nameAddress:X16} name='{name}' -> thread=0x{threadHandle:X16}");
+                $"[LOADER][TRACE] pthread_create: out=0x{threadIdAddress:X16} attr=0x{attrAddress:X16} " +
+                $"entry=0x{entryAddress:X16} arg=0x{argument:X16} name_ptr=0x{nameAddress:X16} " +
+                $"name='{name}' priority={priority} affinity=0x{affinityMask:X} -> thread=0x{threadHandle:X16}");
+        }
+
+        var scheduler = GuestThreadExecution.Scheduler;
+        if (scheduler is not null && entryAddress != 0)
+        {
+            var request = new GuestThreadStartRequest(
+                threadHandle,
+                entryAddress,
+                argument,
+                attrAddress,
+                name,
+                priority,
+                affinityMask);
+            if (!scheduler.TryStartThread(ctx, request, out var error))
+            {
+                Console.Error.WriteLine(
+                    $"[LOADER][ERROR] pthread_create: failed to schedule guest thread '{name}' entry=0x{entryAddress:X16}: {error}");
+                ctx[CpuRegister.Rax] = unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN);
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN;
+            }
         }
 
         ctx[CpuRegister.Rax] = 0;
@@ -225,6 +261,42 @@ public static class KernelExports
         return PthreadCreate(ctx);
     }
 
+    [SysAbiExport(
+        Nid = "Jmi+9w9u0E4",
+        ExportName = "pthread_create_name_np",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PosixPthreadCreateNameNp(CpuContext ctx)
+    {
+        return PthreadCreate(ctx);
+    }
+
+    [SysAbiExport(
+        Nid = "3kg7rT0NQIs",
+        ExportName = "scePthreadExit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadExit(CpuContext ctx)
+    {
+        var value = ctx[CpuRegister.Rdi];
+        GuestThreadExecution.RequestCurrentEntryExit("scePthreadExit", value);
+        ctx[CpuRegister.Rax] = value;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "FJrT5LuUBAU",
+        ExportName = "pthread_exit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePosix")]
+    public static int PosixPthreadExit(CpuContext ctx)
+    {
+        var value = ctx[CpuRegister.Rdi];
+        GuestThreadExecution.RequestCurrentEntryExit("pthread_exit", value);
+        ctx[CpuRegister.Rax] = value;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "onNY9Byn-W8",
         ExportName = "scePthreadJoin",
@@ -234,10 +306,6 @@ public static class KernelExports
     {
         var threadId = ctx[CpuRegister.Rdi];
         var returnValueAddress = ctx[CpuRegister.Rsi];
-        if (returnValueAddress != 0 && !ctx.TryWriteUInt64(returnValueAddress, 0))
-        {
-            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
-        }
 
         if (ShouldTracePthread())
         {
@@ -245,6 +313,30 @@ public static class KernelExports
                 $"[LOADER][TRACE] pthread_join: thread=0x{threadId:X16} retval_out=0x{returnValueAddress:X16}");
         }
 
+        var returnValue = 0UL;
+        if (GuestThreadExecution.Scheduler is { } scheduler &&
+            !scheduler.TryJoinThread(ctx, threadId, out returnValue, out var error))
+        {
+            Console.Error.WriteLine(
+                $"[LOADER][ERROR] pthread_join: thread=0x{threadId:X16}: {error}");
+            var result = string.Equals(
+                error,
+                "thread cannot join itself",
+                StringComparison.Ordinal)
+                ? OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT
+                : OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+            return (int)result;
+        }
+
+        if (returnValueAddress != 0 &&
+            !ctx.TryWriteUInt64(returnValueAddress, returnValue))
+        {
+            ctx[CpuRegister.Rax] =
+                unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -264,22 +356,21 @@ public static class KernelExports
         ExportName = "open",
         Target = Generation.Gen4 | Generation.Gen5,
         LibraryName = "libKernel")]
-    public static int Open(CpuContext ctx)
-    {
-        ctx[CpuRegister.Rax] = unchecked((ulong)Interlocked.Increment(ref _nextFileDescriptor));
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-    }
+    public static int Open(CpuContext ctx) => KernelMemoryCompatExports.KernelOpenUnderscore(ctx);
 
     [SysAbiExport(
         Nid = "1G3lF1Gg1k8",
         ExportName = "sceKernelOpen",
         Target = Generation.Gen4 | Generation.Gen5,
         LibraryName = "libKernel")]
-    public static int KernelOpen(CpuContext ctx)
-    {
-        ctx[CpuRegister.Rax] = unchecked((ulong)Interlocked.Increment(ref _nextFileDescriptor));
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-    }
+    public static int KernelOpen(CpuContext ctx) => KernelMemoryCompatExports.KernelOpenUnderscore(ctx);
+
+    [SysAbiExport(
+        Nid = "mqQMh1zPPT8",
+        ExportName = "fstat",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int Fstat(CpuContext ctx) => KernelMemoryCompatExports.KernelFstat(ctx);
 
     [SysAbiExport(
         Nid = "hcuQgD53UxM",
@@ -290,84 +381,17 @@ public static class KernelExports
     {
         ulong fmtPtr = ctx[CpuRegister.Rdi];
         string fmt = ReadCString(ctx, fmtPtr, 4096);
-
-        ulong[] args =
+        string outStr = KernelMemoryCompatExports.FormatStringFromVarArgs(ctx, fmt, firstGpArgIndex: 1);
+        if (outStr.EndsWith('\n') || outStr.EndsWith('\r'))
         {
-        ctx[CpuRegister.Rsi],
-        ctx[CpuRegister.Rdx],
-        ctx[CpuRegister.Rcx],
-        ctx[CpuRegister.R8],
-        ctx[CpuRegister.R9],
-    };
-
-        int argIndex = 0;
-        var sb = new System.Text.StringBuilder(fmt.Length + 64);
-
-        for (int i = 0; i < fmt.Length; i++)
+            Console.Write($"[DEBUG][PRINF] {outStr}");
+        }
+        else
         {
-            char ch = fmt[i];
-            if (ch != '%')
-            {
-                sb.Append(ch);
-                continue;
-            }
-
-            if (i + 1 < fmt.Length && fmt[i + 1] == '%')
-            {
-                sb.Append('%');
-                i++;
-                continue;
-            }
-
-            int j = i + 1;
-            while (j < fmt.Length && "-+ #0".IndexOf(fmt[j]) >= 0) j++;
-            while (j < fmt.Length && char.IsDigit(fmt[j])) j++;
-
-            if (j < fmt.Length && fmt[j] == '.')
-            {
-                j++;
-                while (j < fmt.Length && char.IsDigit(fmt[j])) j++;
-            }
-
-            if (j >= fmt.Length) break;
-            char spec = fmt[j];
-            i = j;
-
-            ulong a = argIndex < args.Length ? args[argIndex++] : 0;
-
-            switch (spec)
-            {
-                case 's':
-                    sb.Append(a == 0 ? "(null)" : ReadCString(ctx, a, 4096));
-                    break;
-
-                case 'd':
-                case 'i':
-                    sb.Append(unchecked((int)a));
-                    break;
-
-                case 'u':
-                    sb.Append(unchecked((uint)a));
-                    break;
-
-                case 'x':
-                    sb.Append(unchecked((uint)a).ToString("x"));
-                    break;
-
-                case 'p':
-                    sb.Append("0x").Append(a.ToString("x16"));
-                    break;
-
-                default:
-                    sb.Append('%').Append(spec);
-                    break;
-            }
+            Console.WriteLine($"[DEBUG][PRINF] {outStr}");
         }
 
-        string outStr = sb.ToString();
-        Console.WriteLine($"[DEBUG][PRINF] {outStr}");
-
-        ctx[CpuRegister.Rax] = (ulong)outStr.Length;
+        ctx[CpuRegister.Rax] = (ulong)System.Text.Encoding.UTF8.GetByteCount(outStr);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 

src/SharpEmu.Libs/Kernel/KernelPthreadExtendedCompatExports.cs

@@ -3,33 +3,80 @@
 
 using SharpEmu.HLE;
 using System.Buffers.Binary;
+using System.Collections.Concurrent;
 using System.Text;
 using System.Threading;
+using System.Diagnostics.CodeAnalysis;
 
 namespace SharpEmu.Libs.Kernel;
 
 public static class KernelPthreadExtendedCompatExports
 {
     private const int DefaultThreadPriority = 700;
-    private const ulong DefaultThreadAffinityMask = ulong.MaxValue;
+    private const ulong DefaultThreadAffinityMask = 0x7FUL;
     private const int DefaultDetachState = 0;
     private const ulong DefaultGuardSize = 0x1000UL;
     private const ulong DefaultStackSize = 0x1_00000UL;
-    private const int DefaultInheritSched = 0;
-    private const int DefaultSchedPolicy = 0;
-    private const int DefaultSchedPriority = 0;
+    private const int DefaultInheritSched = 4;
+    private const int DefaultSchedPolicy = 1;
+    private const int DefaultSchedPriority = DefaultThreadPriority;
     private const ulong SyntheticRwlockHandleBase = 0x00006003_0000_0000;
+    private const ulong SyntheticPthreadAttrHandleBase = 0x00006004_0000_0000;
+    private const ulong SyntheticRwlockAttrHandleBase = 0x00006005_0000_0000;
 
     private static readonly object _stateGate = new();
     private static readonly Dictionary<ulong, ThreadState> _threadStates = new();
     private static readonly Dictionary<ulong, PthreadAttrState> _attrStates = new();
-    private static readonly Dictionary<ulong, ReaderWriterLockSlim> _rwlockStates = new();
-    private static readonly Dictionary<int, TlsKeyState> _tlsKeys = new();
+    private static readonly Dictionary<ulong, PthreadRwlockState> _rwlockStates = new();
+    private static readonly ConcurrentDictionary<int, TlsKeyState> _tlsKeys = new();
     private static int _nextTlsKey = 1;
     private static long _nextSyntheticRwlockHandleId = 1;
+    private static long _nextSyntheticPthreadAttrHandleId = 1;
+    private static long _nextSyntheticRwlockAttrHandleId = 1;
 
-    [ThreadStatic]
-    private static Dictionary<int, ulong>? _threadLocalSpecific;
+    private static readonly ConcurrentDictionary<ulong, ConcurrentDictionary<int, ulong>> _threadLocalSpecific = new();
+
+    internal static void GetThreadStartScheduling(
+        CpuContext ctx,
+        ulong attrAddress,
+        out int priority,
+        out ulong affinityMask)
+    {
+        if (attrAddress == 0)
+        {
+            priority = DefaultThreadPriority;
+            affinityMask = DefaultThreadAffinityMask;
+            return;
+        }
+
+        var resolvedAddress = ResolvePthreadAttrHandle(ctx, attrAddress);
+        lock (_stateGate)
+        {
+            var attributes = GetOrCreateAttrStateLocked(resolvedAddress);
+            priority = attributes.SchedPriority;
+            affinityMask = attributes.AffinityMask;
+        }
+    }
+
+    internal static void RegisterThreadStart(
+        ulong thread,
+        string name,
+        int priority,
+        ulong affinityMask)
+    {
+        lock (_stateGate)
+        {
+            var state = GetOrCreateThreadStateLocked(thread);
+            state.Name = name;
+            state.Priority = priority;
+            state.AffinityMask = affinityMask;
+            state.Attributes = state.Attributes with
+            {
+                SchedPriority = priority,
+                AffinityMask = affinityMask,
+            };
+        }
+    }
 
     private sealed class ThreadState
     {
@@ -40,6 +87,47 @@ public static class KernelPthreadExtendedCompatExports
         public PthreadAttrState Attributes { get; set; } = PthreadAttrState.Default;
     }
 
+    private sealed class PthreadRwlockState
+    {
+        public object SyncRoot { get; } = new();
+        public Dictionary<ulong, int> ReaderCounts { get; } = new();
+        public int ReaderTotalCount { get; set; }
+        public ulong WriterThreadId { get; set; }
+        public int WaitingWriters { get; set; }
+
+        public int GetReaderCount(ulong threadId)
+        {
+            return ReaderCounts.TryGetValue(threadId, out var count) ? count : 0;
+        }
+
+        public void AddReader(ulong threadId)
+        {
+            ReaderCounts.TryGetValue(threadId, out var currentCount);
+            ReaderCounts[threadId] = currentCount + 1;
+            ReaderTotalCount++;
+        }
+
+        public bool RemoveReader(ulong threadId)
+        {
+            if (!ReaderCounts.TryGetValue(threadId, out var currentCount) || currentCount <= 0)
+            {
+                return false;
+            }
+
+            if (currentCount == 1)
+            {
+                ReaderCounts.Remove(threadId);
+            }
+            else
+            {
+                ReaderCounts[threadId] = currentCount - 1;
+            }
+
+            ReaderTotalCount = Math.Max(0, ReaderTotalCount - 1);
+            return true;
+        }
+    }
+
     private readonly record struct TlsKeyState(ulong Destructor);
 
     private readonly record struct PthreadAttrState(
@@ -142,6 +230,35 @@ public static class KernelPthreadExtendedCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "rcrVFJsQWRY",
+        ExportName = "scePthreadGetaffinity",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadGetaffinity(CpuContext ctx)
+    {
+        var thread = ctx[CpuRegister.Rdi];
+        var outMaskAddress = ctx[CpuRegister.Rsi];
+        if (thread == 0 || outMaskAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        ulong affinityMask;
+        lock (_stateGate)
+        {
+            affinityMask = GetOrCreateThreadStateLocked(thread).AffinityMask;
+        }
+
+        if (!ctx.TryWriteUInt64(outMaskAddress, affinityMask))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "1tKyG7RlMJo",
         ExportName = "scePthreadGetprio",
@@ -194,6 +311,41 @@ public static class KernelPthreadExtendedCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "Xs9hdiD7sAA",
+        ExportName = "pthread_setschedparam",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PosixPthreadSetschedparam(CpuContext ctx)
+    {
+        var thread = ctx[CpuRegister.Rdi];
+        var policy = unchecked((int)ctx[CpuRegister.Rsi]);
+        var schedParamAddress = ctx[CpuRegister.Rdx];
+        if (thread == 0 || schedParamAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!TryReadInt32(ctx, schedParamAddress, out var schedPriority))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        lock (_stateGate)
+        {
+            var state = GetOrCreateThreadStateLocked(thread);
+            state.Priority = schedPriority;
+            state.Attributes = state.Attributes with
+            {
+                SchedPolicy = policy,
+                SchedPriority = schedPriority,
+            };
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "nsYoNRywwNg",
         ExportName = "scePthreadAttrInit",
@@ -207,15 +359,32 @@ public static class KernelPthreadExtendedCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
+        var syntheticHandle = AllocateSyntheticHandle(SyntheticPthreadAttrHandleBase, ref _nextSyntheticPthreadAttrHandleId);
+        if (!ctx.TryWriteUInt64(attrAddress, syntheticHandle))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
         lock (_stateGate)
         {
             _attrStates[attrAddress] = PthreadAttrState.Default;
+            _attrStates[syntheticHandle] = PthreadAttrState.Default;
         }
 
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "wtkt-teR1so",
+        ExportName = "pthread_attr_init",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PosixPthreadAttrInit(CpuContext ctx)
+    {
+        return PthreadAttrInit(ctx);
+    }
+
     [SysAbiExport(
         Nid = "62KCwEMmzcM",
         ExportName = "scePthreadAttrDestroy",
@@ -229,15 +398,31 @@ public static class KernelPthreadExtendedCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
+        var resolvedAddress = ResolvePthreadAttrHandle(ctx, attrAddress);
         lock (_stateGate)
         {
             _attrStates.Remove(attrAddress);
+            if (resolvedAddress != attrAddress)
+            {
+                _attrStates.Remove(resolvedAddress);
+            }
         }
 
+        _ = ctx.TryWriteUInt64(attrAddress, 0);
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "zHchY8ft5pk",
+        ExportName = "pthread_attr_destroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PosixPthreadAttrDestroy(CpuContext ctx)
+    {
+        return PthreadAttrDestroy(ctx);
+    }
+
     [SysAbiExport(
         Nid = "x1X76arYMxU",
         ExportName = "scePthreadAttrGet",
@@ -378,6 +563,37 @@ public static class KernelPthreadExtendedCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "-quPa4SEJUw",
+        ExportName = "scePthreadAttrGetstack",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadAttrGetstack(CpuContext ctx)
+    {
+        var attrAddress = ctx[CpuRegister.Rdi];
+        var outStackAddressPointer = ctx[CpuRegister.Rsi];
+        var outStackSizeAddress = ctx[CpuRegister.Rdx];
+        if (attrAddress == 0 || outStackAddressPointer == 0 || outStackSizeAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        PthreadAttrState state;
+        lock (_stateGate)
+        {
+            state = GetOrCreateAttrStateLocked(attrAddress);
+        }
+
+        if (!ctx.TryWriteUInt64(outStackAddressPointer, state.StackAddress) ||
+            !ctx.TryWriteUInt64(outStackSizeAddress, state.StackSize))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "-fA+7ZlGDQs",
         ExportName = "scePthreadAttrGetstacksize",
@@ -503,6 +719,35 @@ public static class KernelPthreadExtendedCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "FXPWHNk8Of0",
+        ExportName = "scePthreadAttrGetschedparam",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadAttrGetschedparam(CpuContext ctx)
+    {
+        var attrAddress = ctx[CpuRegister.Rdi];
+        var schedParamAddress = ctx[CpuRegister.Rsi];
+        if (attrAddress == 0 || schedParamAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        PthreadAttrState state;
+        lock (_stateGate)
+        {
+            state = GetOrCreateAttrStateLocked(attrAddress);
+        }
+
+        if (!TryWriteInt32(ctx, schedParamAddress, state.SchedPriority))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "DzES9hQF4f4",
         ExportName = "scePthreadAttrSetschedparam",
@@ -570,10 +815,57 @@ public static class KernelPthreadExtendedCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
+        var resolvedAddress = ResolvePthreadAttrHandle(ctx, attrAddress);
         lock (_stateGate)
         {
-            var state = GetOrCreateAttrStateLocked(attrAddress);
-            _attrStates[attrAddress] = state with { StackSize = stackSize };
+            var state = GetOrCreateAttrStateLocked(resolvedAddress);
+            var updated = state with { StackSize = stackSize };
+            _attrStates[resolvedAddress] = updated;
+            if (resolvedAddress != attrAddress)
+            {
+                _attrStates[attrAddress] = updated;
+            }
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "2Q0z6rnBrTE",
+        ExportName = "pthread_attr_setstacksize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PosixPthreadAttrSetstacksize(CpuContext ctx)
+    {
+        return PthreadAttrSetstacksize(ctx);
+    }
+
+    [SysAbiExport(
+        Nid = "Bvn74vj6oLo",
+        ExportName = "scePthreadAttrSetstack",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadAttrSetstack(CpuContext ctx)
+    {
+        var attrAddress = ctx[CpuRegister.Rdi];
+        var stackAddress = ctx[CpuRegister.Rsi];
+        var stackSize = ctx[CpuRegister.Rdx];
+        if (attrAddress == 0 || stackAddress == 0 || stackSize == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var resolvedAddress = ResolvePthreadAttrHandle(ctx, attrAddress);
+        lock (_stateGate)
+        {
+            var state = GetOrCreateAttrStateLocked(resolvedAddress);
+            var updated = state with { StackAddress = stackAddress, StackSize = stackSize };
+            _attrStates[resolvedAddress] = updated;
+            if (resolvedAddress != attrAddress)
+            {
+                _attrStates[attrAddress] = updated;
+            }
         }
 
         ctx[CpuRegister.Rax] = 0;
@@ -599,15 +891,14 @@ public static class KernelPthreadExtendedCompatExports
             var resolvedAddress = ResolveRwlockHandle(ctx, rwlockAddress);
             if (_rwlockStates.Remove(resolvedAddress, out var existing))
             {
-                existing.Dispose();
             }
 
-            var rwlock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
+            var rwlock = new PthreadRwlockState();
             _rwlockStates[rwlockAddress] = rwlock;
             _rwlockStates[syntheticHandle] = rwlock;
         }
 
-        _ = ctx.TryWriteUInt64(rwlockAddress, syntheticHandle);
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, rwlockAddress, syntheticHandle);
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -633,14 +924,10 @@ public static class KernelPthreadExtendedCompatExports
         }
 
         var resolvedAddress = ResolveRwlockHandle(ctx, rwlockAddress);
-        ReaderWriterLockSlim? state;
+        PthreadRwlockState? state;
         lock (_stateGate)
         {
-            _rwlockStates.Remove(resolvedAddress, out state);
-            if (resolvedAddress != rwlockAddress)
-            {
-                _rwlockStates.Remove(rwlockAddress);
-            }
+            _rwlockStates.TryGetValue(resolvedAddress, out state);
         }
 
         if (state is null)
@@ -648,8 +935,24 @@ public static class KernelPthreadExtendedCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
-        _ = ctx.TryWriteUInt64(rwlockAddress, 0);
-        state.Dispose();
+        lock (state.SyncRoot)
+        {
+            if (state.WriterThreadId != 0 || state.ReaderTotalCount != 0 || state.WaitingWriters != 0)
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY;
+            }
+        }
+
+        lock (_stateGate)
+        {
+            _rwlockStates.Remove(resolvedAddress);
+            if (resolvedAddress != rwlockAddress)
+            {
+                _rwlockStates.Remove(rwlockAddress);
+            }
+        }
+
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, rwlockAddress, 0);
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -702,29 +1005,38 @@ public static class KernelPthreadExtendedCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        if (!TryResolveRwlockState(ctx, rwlockAddress, createIfZero: true, out _, out var rwlock))
+        if (!TryResolveRwlockState(ctx, rwlockAddress, createIfZero: false, out _, out var rwlock))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
+        var currentThreadId = KernelPthreadState.GetCurrentThreadHandle();
+
         try
         {
-            if (rwlock.IsWriteLockHeld)
+            lock (rwlock.SyncRoot)
             {
-                rwlock.ExitWriteLock();
-            }
-            else if (rwlock.IsReadLockHeld)
-            {
-                rwlock.ExitReadLock();
-            }
-            else
-            {
-                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+                if (rwlock.WriterThreadId == currentThreadId)
+                {
+                    rwlock.WriterThreadId = 0;
+                    Monitor.PulseAll(rwlock.SyncRoot);
+                }
+                else if (rwlock.RemoveReader(currentThreadId))
+                {
+                    if (rwlock.ReaderTotalCount == 0 || rwlock.WaitingWriters > 0)
+                    {
+                        Monitor.PulseAll(rwlock.SyncRoot);
+                    }
+                }
+                else
+                {
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_PERMISSION_DENIED;
+                }
             }
         }
         catch (SynchronizationLockException)
         {
-            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_PERMISSION_DENIED;
         }
 
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
@@ -737,6 +1049,47 @@ public static class KernelPthreadExtendedCompatExports
         LibraryName = "libKernel")]
     public static int PosixPthreadRwlockUnlock(CpuContext ctx) => PthreadRwlockUnlock(ctx);
 
+    [SysAbiExport(
+        Nid = "yOfGg-I1ZII",
+        ExportName = "scePthreadRwlockattrInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadRwlockattrInit(CpuContext ctx)
+    {
+        var attrAddress = ctx[CpuRegister.Rdi];
+        if (attrAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var syntheticHandle = AllocateSyntheticHandle(SyntheticRwlockAttrHandleBase, ref _nextSyntheticRwlockAttrHandleId);
+        if (!KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, attrAddress, syntheticHandle))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "i2ifZ3fS2fo",
+        ExportName = "scePthreadRwlockattrDestroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadRwlockattrDestroy(CpuContext ctx)
+    {
+        var attrAddress = ctx[CpuRegister.Rdi];
+        if (attrAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, attrAddress, 0);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "mqULNdimTn0",
         ExportName = "pthread_key_create",
@@ -752,15 +1105,13 @@ public static class KernelPthreadExtendedCompatExports
         }
 
         int key;
-        lock (_stateGate)
+        while (true)
         {
-            while (_tlsKeys.ContainsKey(_nextTlsKey))
+            key = Interlocked.Increment(ref _nextTlsKey) - 1;
+            if (_tlsKeys.TryAdd(key, new TlsKeyState(destructor)))
             {
-                _nextTlsKey++;
+                break;
             }
-
-            key = _nextTlsKey++;
-            _tlsKeys[key] = new TlsKeyState(destructor);
         }
 
         if (!TryWriteInt32(ctx, outKeyAddress, key))
@@ -768,7 +1119,7 @@ public static class KernelPthreadExtendedCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
-        ctx[CpuRegister.Rax] = unchecked((uint)key);
+        ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -787,15 +1138,16 @@ public static class KernelPthreadExtendedCompatExports
     public static int PosixPthreadKeyDelete(CpuContext ctx)
     {
         var key = unchecked((int)ctx[CpuRegister.Rdi]);
-        lock (_stateGate)
+        if (!_tlsKeys.TryRemove(key, out _))
         {
-            if (!_tlsKeys.Remove(key))
-            {
-                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
-            }
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        }
+
+        foreach (var values in _threadLocalSpecific.Values)
+        {
+            values.TryRemove(key, out _);
         }
 
-        _threadLocalSpecific?.Remove(key);
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -816,16 +1168,16 @@ public static class KernelPthreadExtendedCompatExports
     {
         var key = unchecked((int)ctx[CpuRegister.Rdi]);
         var value = ctx[CpuRegister.Rsi];
-        lock (_stateGate)
+        var currentThreadHandle = KernelPthreadState.GetCurrentThreadHandle();
+        if (!_tlsKeys.ContainsKey(key))
         {
-            if (!_tlsKeys.TryGetValue(key, out _))
-            {
-                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
-            }
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
-        _threadLocalSpecific ??= new Dictionary<int, ulong>();
-        _threadLocalSpecific[key] = value;
+        var values = _threadLocalSpecific.GetOrAdd(
+            currentThreadHandle,
+            static _ => new ConcurrentDictionary<int, ulong>());
+        values[key] = value;
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -845,19 +1197,21 @@ public static class KernelPthreadExtendedCompatExports
     public static int PosixPthreadGetspecific(CpuContext ctx)
     {
         var key = unchecked((int)ctx[CpuRegister.Rdi]);
-        lock (_stateGate)
+        var currentThreadHandle = KernelPthreadState.GetCurrentThreadHandle();
+        ulong value = 0;
+        if (!_tlsKeys.ContainsKey(key))
         {
-            if (!_tlsKeys.TryGetValue(key, out _))
-            {
-                ctx[CpuRegister.Rax] = 0;
-                return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-            }
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
         }
 
-        ctx[CpuRegister.Rax] =
-            _threadLocalSpecific is not null && _threadLocalSpecific.TryGetValue(key, out var value)
-                ? value
-                : 0UL;
+        if (_threadLocalSpecific.TryGetValue(currentThreadHandle, out var values) &&
+            values.TryGetValue(key, out var storedValue))
+        {
+            value = storedValue;
+        }
+
+        ctx[CpuRegister.Rax] = value;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -880,21 +1234,47 @@ public static class KernelPthreadExtendedCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
-        try
+        var currentThreadId = KernelPthreadState.GetCurrentThreadHandle();
+        lock (rwlock.SyncRoot)
         {
             if (write)
             {
-                rwlock.EnterWriteLock();
+                if (rwlock.WriterThreadId == currentThreadId || rwlock.GetReaderCount(currentThreadId) > 0)
+                {
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_DEADLOCK;
+                }
+
+                rwlock.WaitingWriters++;
+                try
+                {
+                    while (rwlock.WriterThreadId != 0 || rwlock.ReaderTotalCount != 0)
+                    {
+                        Monitor.Wait(rwlock.SyncRoot);
+                    }
+                }
+                finally
+                {
+                    rwlock.WaitingWriters--;
+                }
+
+                rwlock.WriterThreadId = currentThreadId;
             }
             else
             {
-                rwlock.EnterReadLock();
+                if (rwlock.WriterThreadId == currentThreadId)
+                {
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_DEADLOCK;
+                }
+
+                while (rwlock.WriterThreadId != 0 ||
+                       (rwlock.WaitingWriters > 0 && rwlock.GetReaderCount(currentThreadId) == 0))
+                {
+                    Monitor.Wait(rwlock.SyncRoot);
+                }
+
+                rwlock.AddReader(currentThreadId);
             }
         }
-        catch (LockRecursionException)
-        {
-            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_ALREADY_EXISTS;
-        }
 
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -914,7 +1294,7 @@ public static class KernelPthreadExtendedCompatExports
             }
         }
 
-        if (ctx.TryReadUInt64(rwlockAddress, out var pointedHandle) && pointedHandle != 0)
+        if (KernelMemoryCompatExports.TryReadUInt64Compat(ctx, rwlockAddress, out var pointedHandle) && pointedHandle != 0)
         {
             lock (_stateGate)
             {
@@ -928,7 +1308,7 @@ public static class KernelPthreadExtendedCompatExports
         return rwlockAddress;
     }
 
-    private static bool TryResolveRwlockState(CpuContext ctx, ulong rwlockAddress, bool createIfZero, out ulong resolvedAddress, out ReaderWriterLockSlim? rwlock)
+    private static bool TryResolveRwlockState(CpuContext ctx, ulong rwlockAddress, bool createIfZero, out ulong resolvedAddress, [NotNullWhen(true)] out PthreadRwlockState? rwlock)
     {
         resolvedAddress = 0;
         rwlock = null;
@@ -946,7 +1326,7 @@ public static class KernelPthreadExtendedCompatExports
             }
         }
 
-        if (!ctx.TryReadUInt64(rwlockAddress, out var pointedHandle))
+        if (!KernelMemoryCompatExports.TryReadUInt64Compat(ctx, rwlockAddress, out var pointedHandle))
         {
             return false;
         }
@@ -973,7 +1353,7 @@ public static class KernelPthreadExtendedCompatExports
             return false;
         }
 
-        var createdRwlock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
+        var createdRwlock = new PthreadRwlockState();
         var syntheticHandle = AllocateSyntheticHandle(SyntheticRwlockHandleBase, ref _nextSyntheticRwlockHandleId);
         lock (_stateGate)
         {
@@ -981,7 +1361,7 @@ public static class KernelPthreadExtendedCompatExports
             _rwlockStates[syntheticHandle] = createdRwlock;
         }
 
-        _ = ctx.TryWriteUInt64(rwlockAddress, syntheticHandle);
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, rwlockAddress, syntheticHandle);
         resolvedAddress = syntheticHandle;
         rwlock = createdRwlock;
         return true;
@@ -1028,6 +1408,35 @@ public static class KernelPthreadExtendedCompatExports
         return state;
     }
 
+    private static ulong ResolvePthreadAttrHandle(CpuContext ctx, ulong attrAddress)
+    {
+        if (attrAddress == 0)
+        {
+            return 0;
+        }
+
+        lock (_stateGate)
+        {
+            if (_attrStates.ContainsKey(attrAddress))
+            {
+                return attrAddress;
+            }
+        }
+
+        if (ctx.TryReadUInt64(attrAddress, out var pointedHandle) && pointedHandle != 0)
+        {
+            lock (_stateGate)
+            {
+                if (_attrStates.ContainsKey(pointedHandle))
+                {
+                    return pointedHandle;
+                }
+            }
+        }
+
+        return attrAddress;
+    }
+
     private static bool TryWriteFixedUtf8CString(CpuContext ctx, ulong address, string value, int maxBytes)
     {
         if (maxBytes <= 0)

src/SharpEmu.Libs/Kernel/KernelPthreadState.cs

@@ -1,8 +1,10 @@
 // Copyright (C) 2026 SharpEmu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+using System.Collections.Concurrent;
 using System.Runtime.InteropServices;
 using System.Threading;
+using SharpEmu.HLE;
 
 namespace SharpEmu.Libs.Kernel;
 
@@ -10,8 +12,7 @@ internal static class KernelPthreadState
 {
     private const int ThreadObjectSize = 0x1000;
 
-    private static readonly object Gate = new();
-    private static readonly Dictionary<ulong, ThreadIdentity> Threads = new();
+    private static readonly ConcurrentDictionary<ulong, ThreadIdentity> Threads = new();
     private static readonly byte[] ZeroThreadObject = new byte[ThreadObjectSize];
     private static long _nextUniqueThreadId = 1;
 
@@ -25,12 +26,24 @@ internal static class KernelPthreadState
 
     internal static ulong GetCurrentThreadHandle()
     {
+        var guestThreadHandle = GuestThreadExecution.CurrentGuestThreadHandle;
+        if (guestThreadHandle != 0 && TryGetThreadIdentity(guestThreadHandle, out _))
+        {
+            return guestThreadHandle;
+        }
+
         EnsureCurrentThreadRegistered();
         return _currentThreadHandle;
     }
 
     internal static ulong GetCurrentThreadUniqueId()
     {
+        var guestThreadHandle = GuestThreadExecution.CurrentGuestThreadHandle;
+        if (guestThreadHandle != 0 && TryGetThreadIdentity(guestThreadHandle, out var identity))
+        {
+            return identity.UniqueId;
+        }
+
         EnsureCurrentThreadRegistered();
         return _currentThreadUniqueId;
     }
@@ -43,10 +56,7 @@ internal static class KernelPthreadState
 
     internal static bool TryGetThreadIdentity(ulong threadHandle, out ThreadIdentity identity)
     {
-        lock (Gate)
-        {
-            return Threads.TryGetValue(threadHandle, out identity);
-        }
+        return Threads.TryGetValue(threadHandle, out identity);
     }
 
     private static void EnsureCurrentThreadRegistered()
@@ -68,10 +78,7 @@ internal static class KernelPthreadState
         Marshal.Copy(ZeroThreadObject, 0, pointer, ThreadObjectSize);
 
         var handle = unchecked((ulong)pointer.ToInt64());
-        lock (Gate)
-        {
-            Threads[handle] = new ThreadIdentity(uniqueId, string.IsNullOrWhiteSpace(name) ? $"Thread-{uniqueId:X}" : name);
-        }
+        Threads[handle] = new ThreadIdentity(uniqueId, string.IsNullOrWhiteSpace(name) ? $"Thread-{uniqueId:X}" : name);
 
         return handle;
     }

src/SharpEmu.Libs/Kernel/KernelRuntimeCompatExports.cs

@@ -2,11 +2,11 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 using SharpEmu.HLE;
+using SharpEmu.Libs.Fiber;
 using System.Buffers.Binary;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
-using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Runtime.Intrinsics.X86;
 using System.Security.Cryptography;
@@ -25,12 +25,16 @@ public static class KernelRuntimeCompatExports
     private const ulong TlsNewReplaceOffset = 0x300;
     private const int MallocReplaceSize = 0x70;
     private const int NewReplaceSize = 0x68;
+    private const int OrbisTimesecSize = sizeof(long) + sizeof(uint) + sizeof(uint);
     private const ulong ModuleInfoHandleOffset = 0x108;
     private const ulong ModuleInfoNameOffset = 0x10;
     private const int ModuleInfoNameMaxBytes = 64;
     private const ulong DefaultKernelTscFrequency = 10_000_000UL;
     private const ulong PrtAreaStartAddress = 0x0000001000000000UL;
     private const ulong PrtAreaSize = 0x000000EC00000000UL;
+    private const int MapFlagFixed = 0x10;
+    private const ulong DefaultVirtualRangeAlignment = 0x4000UL;
+    private const int AioInitParamSize = 0x3C;
     private const uint MemCommit = 0x1000;
     private const uint MemReserve = 0x2000;
     private const uint PageExecuteReadWrite = 0x40;
@@ -51,6 +55,14 @@ public static class KernelRuntimeCompatExports
     private static readonly object _prtApertureGate = new();
     private static readonly (ulong Base, ulong Size)[] _prtApertures = new (ulong Base, ulong Size)[3];
     private static int _stackChkFailCount;
+    private static long _usleepTraceCount;
+    private static readonly bool _traceUsleep =
+        string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_USLEEP"), "1", StringComparison.Ordinal);
+    private static readonly bool _traceGuestThreads =
+        string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_GUEST_THREADS"), "1", StringComparison.Ordinal);
+
+    [ThreadStatic]
+    private static int _shortUsleepCount;
 
     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
     private delegate ulong RdtscDelegate();
@@ -63,33 +75,104 @@ public static class KernelRuntimeCompatExports
     public static int KernelUsleep(CpuContext ctx)
     {
         var micros = ctx[CpuRegister.Rdi];
+        TraceUsleepSpin(ctx, micros);
         if (micros == 0)
         {
             ctx[CpuRegister.Rax] = 0;
             return (int)OrbisGen2Result.ORBIS_GEN2_OK;
         }
 
-        var sleepMilliseconds = (int)Math.Min(micros / 1000UL, int.MaxValue);
-        if (sleepMilliseconds > 0)
-        {
-            Thread.Sleep(sleepMilliseconds);
-        }
+        GuestThreadExecution.Scheduler?.Pump(ctx, "sceKernelUsleep");
 
-        var remainingMicros = micros % 1000UL;
-        if (remainingMicros > 0)
+        if (micros < 1000)
         {
-            var targetTicks = (long)((double)remainingMicros * Stopwatch.Frequency / 1_000_000.0);
-            var spin = Stopwatch.StartNew();
-            while (spin.ElapsedTicks < targetTicks)
+            // Guest worker pools use usleep(1) as a polling backoff. Do not turn
+            // PS microsecond waits into Windows millisecond sleeps on hot paths.
+            if ((++_shortUsleepCount & 255) == 0)
             {
-                Thread.SpinWait(16);
+                Thread.Sleep(0);
             }
+            else
+            {
+                Thread.Yield();
+            }
+        }
+        else
+        {
+            _shortUsleepCount = 0;
+            var sleepMilliseconds = (int)Math.Min((micros + 999UL) / 1000UL, int.MaxValue);
+            Thread.Sleep(sleepMilliseconds);
         }
 
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    private static void TraceUsleepSpin(CpuContext ctx, ulong micros)
+    {
+        if (!_traceUsleep)
+        {
+            return;
+        }
+
+        var count = Interlocked.Increment(ref _usleepTraceCount);
+        if (count > 32 && count % 10000 != 0)
+        {
+            return;
+        }
+
+        var rbx = ctx[CpuRegister.Rbx];
+        var r12 = ctx[CpuRegister.R12];
+        var r13 = ctx[CpuRegister.R13];
+        var lockAddress = rbx == 0 ? 0 : rbx + 0xF78;
+        var lockText = "unreadable";
+        if (lockAddress != 0 && ctx.TryReadUInt64(lockAddress, out var lockValue))
+        {
+            lockText = $"0x{lockValue:X16}";
+        }
+
+        var schedulerText = "unreadable";
+        if (r12 != 0 && ctx.TryReadUInt64(r12 + 8, out var schedulerAddress))
+        {
+            schedulerText = $"0x{schedulerAddress:X16}";
+        }
+
+        var waitValueText = "unreadable";
+        if (r13 != 0 && ctx.TryReadUInt64(r13, out var waitValue))
+        {
+            waitValueText = $"0x{waitValue:X16}";
+        }
+
+        var callerReturnText = "unreadable";
+        var rbp = ctx[CpuRegister.Rbp];
+        if (rbp != 0 && ctx.TryReadUInt64(rbp + 8, out var callerReturn))
+        {
+            callerReturnText = $"0x{callerReturn:X16}";
+        }
+
+        var returnRip = GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame)
+            ? frame.ReturnRip
+            : 0UL;
+        var thread = GuestThreadExecution.CurrentGuestThreadHandle;
+        var fiber = FiberExports.GetCurrentFiberAddressForDiagnostics(ctx);
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] usleep#{count}: usec={micros} ret=0x{returnRip:X16} caller={callerReturnText} thread=0x{thread:X16} fiber=0x{fiber:X16} rbx=0x{rbx:X16} lock@+F78=0x{lockAddress:X16}:{lockText} r12=0x{r12:X16} scheduler@+8={schedulerText} r13=0x{r13:X16}:{waitValueText} r14=0x{ctx[CpuRegister.R14]:X16} r15=0x{ctx[CpuRegister.R15]:X16}");
+
+        if (count % 100000 == 0 &&
+            _traceGuestThreads &&
+            GuestThreadExecution.Scheduler is { } scheduler)
+        {
+            foreach (var snapshot in scheduler.SnapshotThreads())
+            {
+                Console.Error.WriteLine(
+                    $"[LOADER][TRACE] guest_thread.snapshot handle=0x{snapshot.ThreadHandle:X16} name='{snapshot.Name}' " +
+                    $"state={snapshot.State} imports={snapshot.ImportCount} nid={snapshot.LastImportNid ?? "none"} " +
+                    $"ret=0x{snapshot.LastReturnRip:X16} block={snapshot.BlockReason ?? "none"}");
+            }
+        }
+    }
+
     [SysAbiExport(
         Nid = "QBi7HCK03hw",
         ExportName = "sceKernelClockGettime",
@@ -155,6 +238,37 @@ public static class KernelRuntimeCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "n88vx3C5nW8",
+        ExportName = "gettimeofday",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PosixGettimeofday(CpuContext ctx)
+    {
+        var timeAddress = ctx[CpuRegister.Rdi];
+        var timezoneAddress = ctx[CpuRegister.Rsi];
+        var now = DateTimeOffset.UtcNow;
+        var seconds = now.ToUnixTimeSeconds();
+        var microseconds = (now.Ticks % TimeSpan.TicksPerSecond) / 10;
+
+        if (timeAddress != 0 &&
+            (!ctx.TryWriteUInt64(timeAddress, unchecked((ulong)seconds)) ||
+             !ctx.TryWriteUInt64(timeAddress + sizeof(long), unchecked((ulong)microseconds))))
+        {
+            return -1;
+        }
+
+        if (timezoneAddress != 0 &&
+            (!TryWriteInt32(ctx, timezoneAddress, 0) ||
+             !TryWriteInt32(ctx, timezoneAddress + sizeof(int), 0)))
+        {
+            return -1;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return 0;
+    }
+
     [SysAbiExport(
         Nid = "-2IRUCO--PM",
         ExportName = "sceKernelReadTsc",
@@ -257,6 +371,8 @@ public static class KernelRuntimeCompatExports
             }
         }
 
+        TraceProcParam(ctx, address);
+
         ctx[CpuRegister.Rax] = address;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -269,6 +385,223 @@ public static class KernelRuntimeCompatExports
         }
     }
 
+    private static void TraceProcParam(CpuContext ctx, ulong address)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PROC_PARAM"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        if (address == 0)
+        {
+            Console.Error.WriteLine("[LOADER][TRACE] proc_param: address=0");
+            return;
+        }
+
+        const int dumpSize = 0x200;
+        var buffer = GC.AllocateUninitializedArray<byte>(dumpSize);
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] proc_param: address=0x{address:X16} unreadable");
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] proc_param: address=0x{address:X16} size=0x{dumpSize:X}");
+        for (var offset = 0; offset < dumpSize; offset += 16)
+        {
+            var slice = buffer.AsSpan(offset, 16);
+            var hex = Convert.ToHexString(slice);
+            Console.Error.WriteLine($"[LOADER][TRACE] proc_param[{offset:X3}]: {hex}");
+        }
+
+        TraceProcParamPointers(ctx, address, buffer);
+    }
+
+    private static void TraceProcParamPointers(CpuContext ctx, ulong baseAddress, ReadOnlySpan<byte> buffer)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PROC_PARAM_PTRS"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        if (buffer.Length < 0x50)
+        {
+            return;
+        }
+
+        for (var offset = 0x20; offset <= 0x48; offset += 8)
+        {
+            var ptr = BinaryPrimitives.ReadUInt64LittleEndian(buffer.Slice(offset, 8));
+            Console.Error.WriteLine($"[LOADER][TRACE] proc_param.ptr@{offset:X2}: 0x{ptr:X16}");
+            if (ptr == 0)
+            {
+                continue;
+            }
+
+            TraceProcParamPointerTarget(ctx, ptr);
+        }
+    }
+
+    private static void TraceProcParamPointerTarget(CpuContext ctx, ulong address)
+    {
+        const int maxAsciiBytes = 256;
+        const int maxWideChars = 128;
+
+        if (TryReadUtf8CString(ctx, address, maxAsciiBytes, out var asciiValue))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] proc_param.ptr.target ascii@0x{address:X16}: \"{asciiValue}\"");
+            return;
+        }
+
+        if (TryReadUtf16CString(ctx, address, maxWideChars, out var wideValue))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] proc_param.ptr.target wide@0x{address:X16}: \"{wideValue}\"");
+            return;
+        }
+
+        var preview = GC.AllocateUninitializedArray<byte>(64);
+        if (ctx.Memory.TryRead(address, preview))
+        {
+            var hex = Convert.ToHexString(preview);
+            Console.Error.WriteLine($"[LOADER][TRACE] proc_param.ptr.target hex@0x{address:X16}: {hex}");
+            TraceProcParamEmbeddedPointers(ctx, address, preview);
+        }
+        else
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] proc_param.ptr.target unreadable@0x{address:X16}");
+        }
+    }
+
+    private static bool TryReadUtf8CString(CpuContext ctx, ulong address, int maxBytes, out string value)
+    {
+        value = string.Empty;
+        var buffer = GC.AllocateUninitializedArray<byte>(maxBytes);
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            return false;
+        }
+
+        var length = Array.IndexOf(buffer, (byte)0);
+        if (length < 0)
+        {
+            length = maxBytes;
+        }
+
+        if (length == 0)
+        {
+            return false;
+        }
+
+        var text = Encoding.UTF8.GetString(buffer, 0, length);
+        if (!IsMostlyPrintable(text))
+        {
+            return false;
+        }
+
+        value = text;
+        return true;
+    }
+
+    private static bool TryReadUtf16CString(CpuContext ctx, ulong address, int maxChars, out string value)
+    {
+        value = string.Empty;
+        var maxBytes = maxChars * 2;
+        var buffer = GC.AllocateUninitializedArray<byte>(maxBytes);
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            return false;
+        }
+
+        var lengthBytes = -1;
+        for (var i = 0; i + 1 < buffer.Length; i += 2)
+        {
+            if (buffer[i] == 0 && buffer[i + 1] == 0)
+            {
+                lengthBytes = i;
+                break;
+            }
+        }
+
+        if (lengthBytes <= 0)
+        {
+            return false;
+        }
+
+        var text = Encoding.Unicode.GetString(buffer, 0, lengthBytes);
+        if (!IsMostlyPrintable(text))
+        {
+            return false;
+        }
+
+        value = text;
+        return true;
+    }
+
+    private static bool IsMostlyPrintable(string text)
+    {
+        if (string.IsNullOrWhiteSpace(text))
+        {
+            return false;
+        }
+
+        var printable = 0;
+        for (var i = 0; i < text.Length; i++)
+        {
+            var ch = text[i];
+            if (ch == '\0')
+            {
+                continue;
+            }
+
+            if (!char.IsControl(ch) || ch == '\r' || ch == '\n' || ch == '\t')
+            {
+                printable++;
+            }
+        }
+
+        return printable >= Math.Max(4, text.Length * 3 / 4);
+    }
+
+    private static void TraceProcParamEmbeddedPointers(CpuContext ctx, ulong baseAddress, ReadOnlySpan<byte> data)
+    {
+        const int maxCandidates = 12;
+        var found = 0;
+        Span<byte> probe = stackalloc byte[2];
+
+        for (var offset = 0; offset + 8 <= data.Length; offset += 8)
+        {
+            var candidate = BinaryPrimitives.ReadUInt64LittleEndian(data.Slice(offset, 8));
+            if (candidate == 0)
+            {
+                continue;
+            }
+
+            if (!ctx.Memory.TryRead(candidate, probe))
+            {
+                continue;
+            }
+
+            if (TryReadUtf8CString(ctx, candidate, 256, out var ascii))
+            {
+                Console.Error.WriteLine($"[LOADER][TRACE] proc_param.ptr.embed@0x{baseAddress:X16}+0x{offset:X2} -> 0x{candidate:X16} ascii \"{ascii}\"");
+                if (++found >= maxCandidates)
+                {
+                    return;
+                }
+                continue;
+            }
+
+            if (TryReadUtf16CString(ctx, candidate, 128, out var wide))
+            {
+                Console.Error.WriteLine($"[LOADER][TRACE] proc_param.ptr.embed@0x{baseAddress:X16}+0x{offset:X2} -> 0x{candidate:X16} wide \"{wide}\"");
+                if (++found >= maxCandidates)
+                {
+                    return;
+                }
+            }
+        }
+    }
+
     [SysAbiExport(
         Nid = "9BcDykPmo1I",
         ExportName = "__error",
@@ -277,19 +610,16 @@ public static class KernelRuntimeCompatExports
     public static int ErrorAddress(CpuContext ctx)
     {
         var address = GetTlsScratchAddress(ctx, TlsErrnoOffset);
-        if (address != 0)
-        {
-            Span<byte> zero = stackalloc byte[sizeof(int)];
-            if (!ctx.Memory.TryWrite(address, zero))
-            {
-                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
-            }
-        }
-
         ctx[CpuRegister.Rax] = address;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    internal static bool TrySetErrno(CpuContext ctx, int value)
+    {
+        var address = GetTlsScratchAddress(ctx, TlsErrnoOffset);
+        return address != 0 && TryWriteInt32(ctx, address, value);
+    }
+
     [SysAbiExport(
         Nid = "bnZxYgAFeA0",
         ExportName = "sceKernelGetSanitizerNewReplaceExternal",
@@ -332,6 +662,17 @@ public static class KernelRuntimeCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "jh+8XiK4LeE",
+        ExportName = "sceKernelIsAddressSanitizerEnabled",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelIsAddressSanitizerEnabled(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "ca7v6Cxulzs",
         ExportName = "sceKernelSetGPO",
@@ -370,7 +711,7 @@ public static class KernelRuntimeCompatExports
     {
         var inOutAddressPointer = ctx[CpuRegister.Rdi];
         var length = ctx[CpuRegister.Rsi];
-        var _flags = ctx[CpuRegister.Rdx];
+        var flags = unchecked((int)ctx[CpuRegister.Rdx]);
         var alignment = ctx[CpuRegister.Rcx];
         if (inOutAddressPointer == 0 || length == 0)
         {
@@ -382,7 +723,8 @@ public static class KernelRuntimeCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
-        var effectiveAlignment = alignment == 0 ? 0x10000UL : alignment;
+        var effectiveAlignment = alignment == 0 ? DefaultVirtualRangeAlignment : alignment;
+        var fixedMapping = (flags & MapFlagFixed) != 0;
         ulong desiredAddress;
         lock (_stateGate)
         {
@@ -391,13 +733,16 @@ public static class KernelRuntimeCompatExports
                 : AlignUp(_nextReservedVirtualBase, effectiveAlignment);
         }
 
-        if (!TryReserveVirtualRange(ctx, desiredAddress, length, out var mappedAddress))
+        if (!TryReserveVirtualRange(ctx, desiredAddress, length, effectiveAlignment, allowSearch: !fixedMapping, out var mappedAddress))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
-        Console.Error.WriteLine(
-            $"[LOADER][TRACE] reserve_virtual_range: req=0x{requestedAddress:X16} desired=0x{desiredAddress:X16} mapped=0x{mappedAddress:X16} len=0x{length:X16}");
+        if (ShouldTraceVirtualMemory())
+        {
+            Console.Error.WriteLine(
+                $"[LOADER][TRACE] reserve_virtual_range: req=0x{requestedAddress:X16} desired=0x{desiredAddress:X16} mapped=0x{mappedAddress:X16} len=0x{length:X16} flags=0x{flags:X8} align=0x{effectiveAlignment:X16}");
+        }
 
         if (!ctx.TryWriteUInt64(inOutAddressPointer, mappedAddress))
         {
@@ -409,6 +754,7 @@ public static class KernelRuntimeCompatExports
             _nextReservedVirtualBase = Math.Max(_nextReservedVirtualBase, mappedAddress + length);
         }
 
+        KernelMemoryCompatExports.RegisterReservedVirtualRange(mappedAddress, length);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -681,14 +1027,12 @@ public static class KernelRuntimeCompatExports
     public static int StackCheckFail(CpuContext ctx)
     {
         var count = Interlocked.Increment(ref _stackChkFailCount);
-        if (count <= 8)
-        {
-            Console.Error.WriteLine(
-                $"[LOADER][WARNING] __stack_chk_fail recovery#{count}: rip=0x{ctx.Rip:X16} rdi=0x{ctx[CpuRegister.Rdi]:X16}");
-        }
-
-        ctx[CpuRegister.Rax] = 0;
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        Console.Error.WriteLine(
+            $"[LOADER][ERROR] __stack_chk_fail#{count}: rip=0x{ctx.Rip:X16} rdi=0x{ctx[CpuRegister.Rdi]:X16}");
+        var result = (int)OrbisGen2Result.ORBIS_GEN2_ERROR_CPU_TRAP;
+        GuestThreadExecution.RequestCurrentEntryExit("__stack_chk_fail", result);
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
     }
 
     [SysAbiExport(
@@ -780,6 +1124,153 @@ public static class KernelRuntimeCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "nu4a0-arQis",
+        ExportName = "sceKernelAioInitializeParam",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAioInitializeParam(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        if (paramAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        Span<byte> zero = stackalloc byte[AioInitParamSize];
+        zero.Clear();
+        if (!ctx.Memory.TryWrite(paramAddress, zero))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "-o5uEDpN+oY",
+        ExportName = "sceKernelConvertUtcToLocaltime",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelConvertUtcToLocaltime(CpuContext ctx)
+    {
+        var utcSeconds = unchecked((long)ctx[CpuRegister.Rdi]);
+        var localTimeAddress = ctx[CpuRegister.Rsi];
+        var timesecAddress = ctx[CpuRegister.Rdx];
+        var dstSecondsAddress = ctx[CpuRegister.Rcx];
+
+        if (localTimeAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var utc = DateTimeOffset.FromUnixTimeSeconds(utcSeconds);
+        var local = TimeZoneInfo.ConvertTime(utc, TimeZoneInfo.Local);
+        var offset = local.Offset;
+        var localSeconds = utcSeconds + (long)offset.TotalSeconds;
+        var dstSeconds = TimeZoneInfo.Local.IsDaylightSavingTime(local.DateTime)
+            ? (uint)Math.Max(0, TimeZoneInfo.Local.GetAdjustmentRules()
+                .Where(rule => rule.DateStart <= local.Date && rule.DateEnd >= local.Date)
+                .Select(rule => rule.DaylightDelta.TotalSeconds)
+                .DefaultIfEmpty(0)
+                .Max())
+            : 0u;
+        var westSeconds = unchecked((uint)(int)offset.TotalSeconds);
+
+        if (!ctx.TryWriteUInt64(localTimeAddress, unchecked((ulong)localSeconds)))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (timesecAddress != 0)
+        {
+            Span<byte> timesec = stackalloc byte[OrbisTimesecSize];
+            BinaryPrimitives.WriteInt64LittleEndian(timesec, utcSeconds);
+            BinaryPrimitives.WriteUInt32LittleEndian(timesec.Slice(sizeof(long), sizeof(uint)), westSeconds);
+            BinaryPrimitives.WriteUInt32LittleEndian(timesec.Slice(sizeof(long) + sizeof(uint), sizeof(uint)), dstSeconds);
+            if (!ctx.Memory.TryWrite(timesecAddress, timesec))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+        }
+
+        if (dstSecondsAddress != 0 && !ctx.TryWriteUInt64(dstSecondsAddress, dstSeconds))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "0NTHN1NKONI",
+        ExportName = "sceKernelConvertLocaltimeToUtc",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelConvertLocaltimeToUtc(CpuContext ctx)
+    {
+        var localSeconds = unchecked((long)ctx[CpuRegister.Rdi]);
+        var utcTimeAddress = ctx[CpuRegister.Rdx];
+        var timezoneAddress = ctx[CpuRegister.Rcx];
+        var dstSecondsAddress = ctx[CpuRegister.R8];
+
+        if (timezoneAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var localDate = DateTimeOffset.FromUnixTimeSeconds(localSeconds).DateTime;
+        var offset = TimeZoneInfo.Local.GetUtcOffset(localDate);
+        var utcSeconds = localSeconds - (long)offset.TotalSeconds;
+        var dstSeconds = TimeZoneInfo.Local.IsDaylightSavingTime(localDate)
+            ? (int)Math.Max(0, TimeZoneInfo.Local.GetAdjustmentRules()
+                .Where(rule => rule.DateStart <= localDate.Date && rule.DateEnd >= localDate.Date)
+                .Select(rule => rule.DaylightDelta.TotalSeconds)
+                .DefaultIfEmpty(0)
+                .Max())
+            : 0;
+        var minutesWest = unchecked((int)-offset.TotalMinutes);
+
+        if (!TryWriteInt32(ctx, timezoneAddress, minutesWest) ||
+            !TryWriteInt32(ctx, timezoneAddress + sizeof(int), dstSeconds / 60))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (utcTimeAddress != 0 && !ctx.TryWriteUInt64(utcTimeAddress, unchecked((ulong)utcSeconds)))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (dstSecondsAddress != 0 && !TryWriteInt32(ctx, dstSecondsAddress, dstSeconds))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "vYU8P9Td2Zo",
+        ExportName = "sceKernelAioInitializeImpl",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelAioInitializeImpl(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        var size = unchecked((int)ctx[CpuRegister.Rsi]);
+        if (paramAddress == 0 || size < AioInitParamSize)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "eR2bZFAAU0Q",
         ExportName = "sceSysmoduleUnloadModule",
@@ -1044,30 +1535,40 @@ public static class KernelRuntimeCompatExports
             ulong.TryParse(overrideHzText, out var overrideHz) &&
             overrideHz >= minSane)
         {
+            TraceKernelTscFrequency("env", overrideHz);
             return overrideHz;
         }
 
-        if (TryResolveCpuidTscFrequency(out ulong cpuidHz) && cpuidHz >= minSane)
-        {
-            return cpuidHz;
-        }
-
         if (TryCalibrateHostTscFrequency(out ulong calibratedHz) && calibratedHz >= minSane)
         {
+            TraceKernelTscFrequency("calibrated-rdtsc", calibratedHz);
             return calibratedHz;
         }
 
+        if (TryResolveCpuidTscFrequency(out ulong cpuidHz) && cpuidHz >= minSane)
+        {
+            TraceKernelTscFrequency("cpuid", cpuidHz);
+            return cpuidHz;
+        }
+
         var hostQpc = Stopwatch.Frequency > 0
             ? unchecked((ulong)Stopwatch.Frequency)
             : DefaultKernelTscFrequency;
         if (hostQpc >= minSane)
         {
+            TraceKernelTscFrequency("qpc", hostQpc);
             return hostQpc;
         }
 
+        TraceKernelTscFrequency("default", DefaultKernelTscFrequency);
         return DefaultKernelTscFrequency;
     }
 
+    private static void TraceKernelTscFrequency(string source, ulong frequencyHz)
+    {
+        Console.Error.WriteLine($"[LOADER][INFO] Kernel TSC frequency: {frequencyHz} Hz ({source})");
+    }
+
     private static bool TryResolveCpuidTscFrequency(out ulong frequencyHz)
     {
         frequencyHz = 0;
@@ -1226,96 +1727,24 @@ public static class KernelRuntimeCompatExports
     [DllImport("kernel32.dll", SetLastError = true)]
     private static extern nint VirtualAlloc(nint lpAddress, nuint dwSize, uint flAllocationType, uint flProtect);
 
-    private static bool TryReserveVirtualRange(CpuContext ctx, ulong desiredAddress, ulong length, out ulong mappedAddress)
+    private static bool TryReserveVirtualRange(
+        CpuContext ctx,
+        ulong desiredAddress,
+        ulong length,
+        ulong alignment,
+        bool allowSearch,
+        out ulong mappedAddress)
     {
-        mappedAddress = 0;
-        if (length == 0)
-        {
-            return false;
-        }
-
-        try
-        {
-            object memoryObject = ctx.Memory;
-            MethodInfo? allocateAt = null;
-            var allocateAtHasAllowAlternativeArg = false;
-            for (var depth = 0; depth < 4; depth++)
-            {
-                foreach (var candidate in memoryObject.GetType().GetMethods(BindingFlags.Public | BindingFlags.Instance))
-                {
-                    if (!string.Equals(candidate.Name, "AllocateAt", StringComparison.Ordinal))
-                    {
-                        continue;
-                    }
-
-                    var parameters = candidate.GetParameters();
-                    if (parameters.Length == 3 &&
-                        parameters[0].ParameterType == typeof(ulong) &&
-                        parameters[1].ParameterType == typeof(ulong) &&
-                        parameters[2].ParameterType == typeof(bool))
-                    {
-                        allocateAt = candidate;
-                        allocateAtHasAllowAlternativeArg = false;
-                        break;
-                    }
-
-                    if (parameters.Length == 4 &&
-                        parameters[0].ParameterType == typeof(ulong) &&
-                        parameters[1].ParameterType == typeof(ulong) &&
-                        parameters[2].ParameterType == typeof(bool) &&
-                        parameters[3].ParameterType == typeof(bool))
-                    {
-                        allocateAt = candidate;
-                        allocateAtHasAllowAlternativeArg = true;
-                        break;
-                    }
-                }
-
-                if (allocateAt is not null)
-                {
-                    break;
-                }
-
-                var innerProperty = memoryObject.GetType().GetProperty("Inner", BindingFlags.Public | BindingFlags.Instance);
-                if (innerProperty is null)
-                {
-                    break;
-                }
-
-                var innerValue = innerProperty.GetValue(memoryObject);
-                if (innerValue is null || ReferenceEquals(innerValue, memoryObject))
-                {
-                    break;
-                }
-
-                memoryObject = innerValue;
-            }
-
-            if (allocateAt is null)
-            {
-                Console.Error.WriteLine($"[LOADER][TRACE] reserve_virtual_range: AllocateAt missing on {ctx.Memory.GetType().FullName}");
-                return false;
-            }
-
-            var invokeArgs = allocateAtHasAllowAlternativeArg
-                ? new object[] { desiredAddress, length, false, true }
-                : new object[] { desiredAddress, length, false };
-            var result = allocateAt.Invoke(memoryObject, invokeArgs);
-            if (result is not ulong allocated || allocated == 0)
-            {
-                var resultType = result?.GetType().FullName ?? "null";
-                Console.Error.WriteLine($"[LOADER][TRACE] reserve_virtual_range: AllocateAt returned {resultType} value={result ?? "null"}");
-                return false;
-            }
-
-            mappedAddress = allocated;
-            return true;
-        }
-        catch
-        {
-            Console.Error.WriteLine("[LOADER][TRACE] reserve_virtual_range: AllocateAt invocation threw");
-            return false;
-        }
+        return KernelVirtualRangeAllocator.TryReserve(
+            ctx,
+            desiredAddress,
+            length,
+            executable: false,
+            alignment,
+            allowSearch,
+            allowAllocateAtAlternative: allowSearch,
+            "reserve_virtual_range",
+            out mappedAddress);
     }
 
     private static ulong AlignUp(ulong value, ulong alignment)
@@ -1328,4 +1757,9 @@ public static class KernelRuntimeCompatExports
         var mask = alignment - 1;
         return (value + mask) & ~mask;
     }
+
+    private static bool ShouldTraceVirtualMemory()
+    {
+        return string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_VIRTUAL_MEMORY"), "1", StringComparison.Ordinal);
+    }
 }

src/SharpEmu.Libs/Kernel/KernelSemaphoreCompatExports.cs

@@ -0,0 +1,266 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Collections.Concurrent;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Kernel;
+
+public static class KernelSemaphoreCompatExports
+{
+    private const int MaxSemaphoreNameLength = 128;
+    private static readonly ConcurrentDictionary<uint, KernelSemaphoreState> _semaphores = new();
+    private static int _nextSemaphoreHandle = 1;
+
+    private sealed class KernelSemaphoreState
+    {
+        public required string Name { get; init; }
+        public required int InitialCount { get; init; }
+        public required int MaxCount { get; init; }
+        public int Count { get; set; }
+        public int WaitingThreads { get; set; }
+        public object Gate { get; } = new();
+    }
+
+    [SysAbiExport(
+        Nid = "188x57JYp0g",
+        ExportName = "sceKernelCreateSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelCreateSema(CpuContext ctx)
+    {
+        var semaphoreAddress = ctx[CpuRegister.Rdi];
+        var nameAddress = ctx[CpuRegister.Rsi];
+        var attr = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var initialCount = unchecked((int)ctx[CpuRegister.Rcx]);
+        var maxCount = unchecked((int)ctx[CpuRegister.R8]);
+        var optionAddress = ctx[CpuRegister.R9];
+
+        if (semaphoreAddress == 0 ||
+            nameAddress == 0 ||
+            attr > 2 ||
+            initialCount < 0 ||
+            maxCount <= 0 ||
+            initialCount > maxCount ||
+            optionAddress != 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxSemaphoreNameLength, out var name))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        var handle = unchecked((uint)Interlocked.Increment(ref _nextSemaphoreHandle));
+        if (handle == 0)
+        {
+            handle = unchecked((uint)Interlocked.Increment(ref _nextSemaphoreHandle));
+        }
+
+        _semaphores[handle] = new KernelSemaphoreState
+        {
+            Name = name,
+            InitialCount = initialCount,
+            MaxCount = maxCount,
+            Count = initialCount,
+        };
+
+        if (!ctx.TryWriteUInt32(semaphoreAddress, handle))
+        {
+            _semaphores.TryRemove(handle, out _);
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceSemaphore($"create handle=0x{handle:X8} name='{name}' attr=0x{attr:X} init={initialCount} max={maxCount}");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "Zxa0VhQVTsk",
+        ExportName = "sceKernelWaitSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelWaitSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var needCount = unchecked((int)ctx[CpuRegister.Rsi]);
+        var timeoutAddress = ctx[CpuRegister.Rdx];
+
+        if (!_semaphores.TryGetValue(handle, out var semaphore))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (needCount < 1 || needCount > semaphore.MaxCount)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (semaphore.Count >= needCount)
+            {
+                semaphore.Count -= needCount;
+                TraceSemaphore($"wait handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+            }
+
+            if (timeoutAddress != 0)
+            {
+                if (!ctx.TryReadUInt32(timeoutAddress, out _))
+                {
+                    return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+
+                _ = ctx.TryWriteUInt32(timeoutAddress, 0);
+                TraceSemaphore($"wait-timeout handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT);
+            }
+
+            if (!GuestThreadExecution.RequestCurrentThreadBlock(ctx, "sceKernelWaitSema"))
+            {
+                TraceSemaphore($"wait-would-block handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN);
+            }
+
+            semaphore.WaitingThreads++;
+            TraceSemaphore($"wait-block handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count} waiters={semaphore.WaitingThreads}");
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "12wOHk8ywb0",
+        ExportName = "sceKernelPollSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelPollSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var needCount = unchecked((int)ctx[CpuRegister.Rsi]);
+
+        if (!_semaphores.TryGetValue(handle, out var semaphore))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (needCount < 1 || needCount > semaphore.MaxCount)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (semaphore.Count < needCount)
+            {
+                TraceSemaphore($"poll-busy handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY);
+            }
+
+            semaphore.Count -= needCount;
+            TraceSemaphore($"poll handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "4czppHBiriw",
+        ExportName = "sceKernelSignalSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelSignalSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var signalCount = unchecked((int)ctx[CpuRegister.Rsi]);
+
+        if (!_semaphores.TryGetValue(handle, out var semaphore))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (signalCount <= 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (semaphore.Count > semaphore.MaxCount - signalCount)
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+            }
+
+            semaphore.Count += signalCount;
+            TraceSemaphore($"signal handle=0x{handle:X8} name='{semaphore.Name}' signal={signalCount} count={semaphore.Count} waiters={semaphore.WaitingThreads}");
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "4DM06U2BNEY",
+        ExportName = "sceKernelCancelSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelCancelSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var setCount = unchecked((int)ctx[CpuRegister.Rsi]);
+        var waitingThreadsAddress = ctx[CpuRegister.Rdx];
+
+        if (!_semaphores.TryGetValue(handle, out var semaphore))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (setCount > semaphore.MaxCount)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (waitingThreadsAddress != 0 && !ctx.TryWriteUInt32(waitingThreadsAddress, unchecked((uint)semaphore.WaitingThreads)))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            semaphore.Count = setCount < 0 ? semaphore.InitialCount : setCount;
+            semaphore.WaitingThreads = 0;
+            TraceSemaphore($"cancel handle=0x{handle:X8} name='{semaphore.Name}' set={setCount} count={semaphore.Count}");
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "R1Jvn8bSCW8",
+        ExportName = "sceKernelDeleteSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        if (!_semaphores.TryRemove(handle, out var semaphore))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        TraceSemaphore($"delete handle=0x{handle:X8} name='{semaphore.Name}'");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        var value = (int)result;
+        ctx[CpuRegister.Rax] = unchecked((ulong)value);
+        return value;
+    }
+
+    private static void TraceSemaphore(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_SEMA"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] sema.{message}");
+        }
+    }
+}

src/SharpEmu.Libs/Kernel/KernelVirtualRangeAllocator.cs

@@ -0,0 +1,159 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System;
+using System.Collections.Concurrent;
+using System.Reflection;
+
+namespace SharpEmu.Libs.Kernel;
+
+internal static class KernelVirtualRangeAllocator
+{
+    private static readonly ConcurrentDictionary<Type, Accessor> _accessors = new();
+
+    public static bool TryReserve(
+        CpuContext ctx,
+        ulong desiredAddress,
+        ulong length,
+        bool executable,
+        ulong alignment,
+        bool allowSearch,
+        bool allowAllocateAtAlternative,
+        string traceName,
+        out ulong mappedAddress)
+    {
+        mappedAddress = 0;
+        if (length == 0)
+        {
+            return false;
+        }
+
+        try
+        {
+            if (!TryResolveAccessor(ctx.Memory, out var target, out var accessor))
+            {
+                Console.Error.WriteLine($"[LOADER][TRACE] {traceName}: AllocateAt missing on {ctx.Memory.GetType().FullName}");
+                return false;
+            }
+
+            if (allowSearch && accessor.AllocateAtOrAbove is not null)
+            {
+                var searchArgs = new object[] { desiredAddress, length, executable, alignment, 0UL };
+                var searchResult = accessor.AllocateAtOrAbove.Invoke(target, searchArgs);
+                if (searchResult is bool trueValue && trueValue &&
+                    searchArgs[4] is ulong searchedAddress && searchedAddress != 0)
+                {
+                    mappedAddress = searchedAddress;
+                    return true;
+                }
+            }
+
+            if (accessor.AllocateAt is null)
+            {
+                Console.Error.WriteLine($"[LOADER][TRACE] {traceName}: AllocateAt missing on {target.GetType().FullName}");
+                return false;
+            }
+
+            var invokeArgs = accessor.AllocateAtHasAllowAlternativeArg
+                ? new object[] { desiredAddress, length, executable, allowAllocateAtAlternative }
+                : new object[] { desiredAddress, length, executable };
+            var result = accessor.AllocateAt.Invoke(target, invokeArgs);
+            if (result is not ulong allocated || allocated == 0)
+            {
+                var resultType = result?.GetType().FullName ?? "null";
+                Console.Error.WriteLine($"[LOADER][TRACE] {traceName}: AllocateAt returned {resultType} value={result ?? "null"}");
+                return false;
+            }
+
+            mappedAddress = allocated;
+            return true;
+        }
+        catch
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] {traceName}: AllocateAt invocation threw");
+            return false;
+        }
+    }
+
+    private static bool TryResolveAccessor(object rootMemory, out object target, out Accessor accessor)
+    {
+        target = rootMemory;
+        accessor = default;
+
+        for (var depth = 0; depth < 4; depth++)
+        {
+            accessor = _accessors.GetOrAdd(target.GetType(), DiscoverAccessor);
+            if (accessor.AllocateAt is not null || accessor.AllocateAtOrAbove is not null)
+            {
+                return true;
+            }
+
+            if (accessor.InnerProperty is null)
+            {
+                break;
+            }
+
+            var innerValue = accessor.InnerProperty.GetValue(target);
+            if (innerValue is null || ReferenceEquals(innerValue, target))
+            {
+                break;
+            }
+
+            target = innerValue;
+        }
+
+        return false;
+    }
+
+    private static Accessor DiscoverAccessor(Type type)
+    {
+        MethodInfo? allocateAt = null;
+        MethodInfo? allocateAtOrAbove = null;
+        var allocateAtHasAllowAlternativeArg = false;
+
+        foreach (var candidate in type.GetMethods(BindingFlags.Public | BindingFlags.Instance))
+        {
+            var parameters = candidate.GetParameters();
+            if (string.Equals(candidate.Name, "TryAllocateAtOrAbove", StringComparison.Ordinal) &&
+                parameters.Length == 5 &&
+                parameters[0].ParameterType == typeof(ulong) &&
+                parameters[1].ParameterType == typeof(ulong) &&
+                parameters[2].ParameterType == typeof(bool) &&
+                parameters[3].ParameterType == typeof(ulong) &&
+                parameters[4].ParameterType == typeof(ulong).MakeByRefType())
+            {
+                allocateAtOrAbove = candidate;
+            }
+            else if (string.Equals(candidate.Name, "AllocateAt", StringComparison.Ordinal))
+            {
+                if (parameters.Length == 3 &&
+                    parameters[0].ParameterType == typeof(ulong) &&
+                    parameters[1].ParameterType == typeof(ulong) &&
+                    parameters[2].ParameterType == typeof(bool))
+                {
+                    allocateAt = candidate;
+                    allocateAtHasAllowAlternativeArg = false;
+                }
+                else if (parameters.Length == 4 &&
+                    parameters[0].ParameterType == typeof(ulong) &&
+                    parameters[1].ParameterType == typeof(ulong) &&
+                    parameters[2].ParameterType == typeof(bool) &&
+                    parameters[3].ParameterType == typeof(bool))
+                {
+                    allocateAt = candidate;
+                    allocateAtHasAllowAlternativeArg = true;
+                }
+            }
+        }
+
+        var innerProperty = type.GetProperty("Inner", BindingFlags.Public | BindingFlags.Instance);
+        return new Accessor(allocateAt, allocateAtOrAbove, allocateAtHasAllowAlternativeArg, innerProperty);
+    }
+
+    private readonly record struct Accessor(
+        MethodInfo? AllocateAt,
+        MethodInfo? AllocateAtOrAbove,
+        bool AllocateAtHasAllowAlternativeArg,
+        PropertyInfo? InnerProperty);
+}

src/SharpEmu.Libs/Network/Http2Exports.cs

@@ -0,0 +1,79 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System;
+using System.Collections.Concurrent;
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Network;
+
+public static class Http2Exports
+{
+    private const int Http2ErrorInvalidId = unchecked((int)0x80436004);
+    private const int Http2ErrorInvalidArgument = unchecked((int)0x80436016);
+
+    private static readonly ConcurrentDictionary<int, Http2Context> _contexts = new();
+    private static int _nextContextId;
+
+    private sealed record Http2Context(int NetId, int SslId, ulong PoolSize, int MaxRequests);
+
+    [SysAbiExport(
+        Nid = "3JCe3lCbQ8A",
+        ExportName = "sceHttp2Init",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceHttp2")]
+    public static int Http2Init(CpuContext ctx)
+    {
+        var netId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var sslId = unchecked((int)ctx[CpuRegister.Rsi]);
+        var poolSize = ctx[CpuRegister.Rdx];
+        var maxRequests = unchecked((int)ctx[CpuRegister.Rcx]);
+
+        if (poolSize == 0 || maxRequests <= 0)
+        {
+            return SetReturn(ctx, Http2ErrorInvalidArgument);
+        }
+
+        var id = Interlocked.Increment(ref _nextContextId);
+        _contexts[id] = new Http2Context(netId, sslId, poolSize, maxRequests);
+
+        TraceHttp2("init", id, unchecked((ulong)netId), unchecked((ulong)sslId), poolSize, unchecked((ulong)maxRequests));
+        ctx[CpuRegister.Rax] = unchecked((ulong)id);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "YiBUtz-pGkc",
+        ExportName = "sceHttp2Term",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceHttp2")]
+    public static int Http2Term(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        if (!_contexts.TryRemove(id, out _))
+        {
+            return SetReturn(ctx, Http2ErrorInvalidId);
+        }
+
+        TraceHttp2("term", id, 0, 0, 0, 0);
+        return SetReturn(ctx, 0);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceHttp2(string operation, int id, ulong arg0, ulong arg1, ulong arg2, ulong arg3)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_HTTP2"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] http2.{operation} id={id} arg0=0x{arg0:X16} arg1=0x{arg1:X16} arg2=0x{arg2:X16} arg3=0x{arg3:X16}");
+    }
+}

src/SharpEmu.Libs/Network/HttpExports.cs

@@ -0,0 +1,122 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Collections.Concurrent;
+using System.Threading;
+
+namespace SharpEmu.Libs.Network;
+
+public static class HttpExports
+{
+    private const int HttpErrorInvalidId = unchecked((int)0x80431100);
+    private const int HttpErrorInvalidValue = unchecked((int)0x804311FE);
+
+    private static readonly ConcurrentDictionary<int, HttpContext> Contexts = new();
+    private static readonly ConcurrentDictionary<int, HttpTemplate> Templates = new();
+    private static int _nextContextId;
+    private static int _nextTemplateId = 0x1000;
+
+    private sealed record HttpContext(int NetMemoryId, int SslContextId, ulong PoolSize);
+
+    private sealed record HttpTemplate(int ContextId, ulong UserAgentAddress, int HttpVersion, bool AutoProxyConfig);
+
+    [SysAbiExport(
+        Nid = "A9cVMUtEp4Y",
+        ExportName = "sceHttpInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceHttp")]
+    public static int HttpInit(CpuContext ctx)
+    {
+        var netMemoryId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var sslContextId = unchecked((int)ctx[CpuRegister.Rsi]);
+        var poolSize = ctx[CpuRegister.Rdx];
+        if (poolSize == 0)
+        {
+            return SetReturn(ctx, HttpErrorInvalidValue);
+        }
+
+        var id = Interlocked.Increment(ref _nextContextId);
+        Contexts[id] = new HttpContext(netMemoryId, sslContextId, poolSize);
+        TraceHttp("init", id, unchecked((ulong)netMemoryId), unchecked((ulong)sslContextId), poolSize, 0);
+        ctx[CpuRegister.Rax] = unchecked((ulong)id);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "0gYjPTR-6cY",
+        ExportName = "sceHttpCreateTemplate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceHttp")]
+    public static int HttpCreateTemplate(CpuContext ctx)
+    {
+        var contextId = unchecked((int)ctx[CpuRegister.Rdi]);
+        if (!Contexts.ContainsKey(contextId))
+        {
+            return SetReturn(ctx, HttpErrorInvalidId);
+        }
+
+        var userAgentAddress = ctx[CpuRegister.Rsi];
+        var httpVersion = unchecked((int)ctx[CpuRegister.Rdx]);
+        var autoProxyConfig = ctx[CpuRegister.Rcx] != 0;
+        var id = Interlocked.Increment(ref _nextTemplateId);
+        Templates[id] = new HttpTemplate(contextId, userAgentAddress, httpVersion, autoProxyConfig);
+        TraceHttp("create_template", id, unchecked((ulong)contextId), userAgentAddress, unchecked((ulong)httpVersion), autoProxyConfig ? 1UL : 0UL);
+        ctx[CpuRegister.Rax] = unchecked((ulong)id);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "4I8vEpuEhZ8",
+        ExportName = "sceHttpDeleteTemplate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceHttp")]
+    public static int HttpDeleteTemplate(CpuContext ctx)
+    {
+        var templateId = unchecked((int)ctx[CpuRegister.Rdi]);
+        return Templates.TryRemove(templateId, out _)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, HttpErrorInvalidId);
+    }
+
+    [SysAbiExport(
+        Nid = "Ik-KpLTlf7Q",
+        ExportName = "sceHttpTerm",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceHttp")]
+    public static int HttpTerm(CpuContext ctx)
+    {
+        var contextId = unchecked((int)ctx[CpuRegister.Rdi]);
+        if (!Contexts.TryRemove(contextId, out _))
+        {
+            return SetReturn(ctx, HttpErrorInvalidId);
+        }
+
+        foreach (var pair in Templates)
+        {
+            if (pair.Value.ContextId == contextId)
+            {
+                Templates.TryRemove(pair.Key, out _);
+            }
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceHttp(string operation, int id, ulong arg0, ulong arg1, ulong arg2, ulong arg3)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_HTTP"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] http.{operation} id={id} arg0=0x{arg0:X16} arg1=0x{arg1:X16} arg2=0x{arg2:X16} arg3=0x{arg3:X16}");
+    }
+}

src/SharpEmu.Libs/Network/NetCtlExports.cs

@@ -0,0 +1,229 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+
+namespace SharpEmu.Libs.Network;
+
+public static class NetCtlExports
+{
+    private const int MaxCallbacks = 8;
+    private const int NatInfoSize = 16;
+    private const int NetCtlErrorNoSpace = unchecked((int)0x80412103);
+    private const int NetCtlErrorInvalidAddress = unchecked((int)0x80412107);
+    private const int NetCtlErrorNotConnected = unchecked((int)0x80412108);
+    private const int NetCtlInfoDevice = 1;
+    private const int NetCtlInfoEtherAddress = 2;
+    private const int NetCtlInfoMtu = 3;
+    private const int NetCtlInfoLink = 4;
+    private const int NetCtlInfoIpConfig = 11;
+    private const int NetCtlInfoDhcpHostname = 12;
+    private const int NetCtlInfoPppoeAuthName = 13;
+    private const int NetCtlInfoIpAddress = 14;
+    private const int NetCtlInfoNetmask = 15;
+    private const int NetCtlInfoDefaultRoute = 16;
+    private const int NetCtlInfoPrimaryDns = 17;
+    private const int NetCtlInfoSecondaryDns = 18;
+    private const int NetCtlInfoHttpProxyConfig = 19;
+    private const int NetCtlInfoHttpProxyServer = 20;
+    private const int NetCtlInfoHttpProxyPort = 21;
+    private const int NetCtlDeviceWired = 0;
+    private const int NetCtlLinkDisconnected = 0;
+    private const int NetCtlIpConfigStatic = 0;
+    private static readonly object CallbackGate = new();
+    private static readonly CallbackRegistration[] Callbacks = new CallbackRegistration[MaxCallbacks];
+
+    private readonly record struct CallbackRegistration(ulong Function, ulong Argument);
+
+    [SysAbiExport(
+        Nid = "gky0+oaNM4k",
+        ExportName = "sceNetCtlInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlInit(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "JO4yuTuMoKI",
+        ExportName = "sceNetCtlGetNatInfo",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlGetNatInfo(CpuContext ctx)
+    {
+        var natInfoAddress = ctx[CpuRegister.Rdi];
+        if (natInfoAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        Span<byte> natInfo = stackalloc byte[NatInfoSize];
+        if (!ctx.Memory.TryRead(natInfoAddress, natInfo))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        var size = BinaryPrimitives.ReadUInt32LittleEndian(natInfo[..sizeof(uint)]);
+        if (size != NatInfoSize)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        BinaryPrimitives.WriteInt32LittleEndian(natInfo[4..], 1);
+        BinaryPrimitives.WriteInt32LittleEndian(natInfo[8..], 3);
+        BinaryPrimitives.WriteUInt32LittleEndian(natInfo[12..], 0x7F000001);
+        return ctx.Memory.TryWrite(natInfoAddress, natInfo)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "iQw3iQPhvUQ",
+        ExportName = "sceNetCtlCheckCallback",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlCheckCallback(CpuContext ctx)
+    {
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "uBPlr0lbuiI",
+        ExportName = "sceNetCtlGetState",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlGetState(CpuContext ctx)
+    {
+        var stateAddress = ctx[CpuRegister.Rdi];
+        if (stateAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        Span<byte> stateBytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(stateBytes, 0);
+        return ctx.Memory.TryWrite(stateAddress, stateBytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "UJ+Z7Q+4ck0",
+        ExportName = "sceNetCtlRegisterCallback",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlRegisterCallback(CpuContext ctx)
+    {
+        var function = ctx[CpuRegister.Rdi];
+        var argument = ctx[CpuRegister.Rsi];
+        var callbackIdAddress = ctx[CpuRegister.Rdx];
+        if (function == 0 || callbackIdAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        lock (CallbackGate)
+        {
+            var callbackId = Array.FindIndex(Callbacks, static callback => callback.Function == 0);
+            if (callbackId < 0)
+            {
+                return SetReturn(ctx, NetCtlErrorNoSpace);
+            }
+
+            Span<byte> callbackIdBytes = stackalloc byte[sizeof(uint)];
+            BinaryPrimitives.WriteUInt32LittleEndian(callbackIdBytes, unchecked((uint)callbackId));
+            if (!ctx.Memory.TryWrite(callbackIdAddress, callbackIdBytes))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            Callbacks[callbackId] = new CallbackRegistration(function, argument);
+        }
+
+        return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "obuxdTiwkF8",
+        ExportName = "sceNetCtlGetInfo",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlGetInfo(CpuContext ctx)
+    {
+        var code = unchecked((int)ctx[CpuRegister.Rdi]);
+        var infoAddress = ctx[CpuRegister.Rsi];
+        if (infoAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        return code switch
+        {
+            NetCtlInfoDevice => WriteUInt32(ctx, infoAddress, NetCtlDeviceWired),
+            NetCtlInfoEtherAddress => WriteZeroBytes(ctx, infoAddress, 6),
+            NetCtlInfoMtu => WriteUInt32(ctx, infoAddress, 1500),
+            NetCtlInfoLink => WriteUInt32(ctx, infoAddress, NetCtlLinkDisconnected),
+            NetCtlInfoIpConfig => WriteUInt32(ctx, infoAddress, NetCtlIpConfigStatic),
+            NetCtlInfoDhcpHostname => WriteAsciiZ(ctx, infoAddress, string.Empty, 256),
+            NetCtlInfoPppoeAuthName => WriteAsciiZ(ctx, infoAddress, string.Empty, 128),
+            NetCtlInfoIpAddress => WriteAsciiZ(ctx, infoAddress, "127.0.0.1", 16),
+            NetCtlInfoNetmask => WriteAsciiZ(ctx, infoAddress, "255.0.0.0", 16),
+            NetCtlInfoDefaultRoute => WriteAsciiZ(ctx, infoAddress, "127.0.0.1", 16),
+            NetCtlInfoPrimaryDns => WriteAsciiZ(ctx, infoAddress, "1.1.1.1", 16),
+            NetCtlInfoSecondaryDns => WriteAsciiZ(ctx, infoAddress, "1.1.1.1", 16),
+            NetCtlInfoHttpProxyConfig => WriteUInt32(ctx, infoAddress, 0),
+            NetCtlInfoHttpProxyServer => WriteAsciiZ(ctx, infoAddress, string.Empty, 256),
+            NetCtlInfoHttpProxyPort => WriteUInt16(ctx, infoAddress, 0),
+            _ => SetReturn(ctx, NetCtlErrorNotConnected),
+        };
+    }
+
+    private static int WriteZeroBytes(CpuContext ctx, ulong address, int count)
+    {
+        Span<byte> bytes = stackalloc byte[count];
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int WriteUInt32(CpuContext ctx, ulong address, uint value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(bytes, value);
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int WriteUInt16(CpuContext ctx, ulong address, ushort value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(ushort)];
+        BinaryPrimitives.WriteUInt16LittleEndian(bytes, value);
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int WriteAsciiZ(CpuContext ctx, ulong address, string value, int byteCount)
+    {
+        Span<byte> bytes = stackalloc byte[byteCount];
+        var copyCount = Math.Min(value.Length, byteCount - 1);
+        for (var i = 0; i < copyCount; i++)
+        {
+            bytes[i] = (byte)value[i];
+        }
+
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(long)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/Network/NetExports.cs

@@ -0,0 +1,210 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System;
+using System.Buffers.Binary;
+using System.Collections.Concurrent;
+using System.Text;
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Network;
+
+public static class NetExports
+{
+    private const int NetErrorBadFileDescriptor = unchecked((int)0x80410109);
+    private const int NetErrorInvalidArgument = unchecked((int)0x80410116);
+    private const int MaxNameLength = 256;
+
+    private static readonly ConcurrentDictionary<int, NetPool> _pools = new();
+    private static readonly ConcurrentDictionary<int, ResolverContext> _resolvers = new();
+    private static int _nextPoolId;
+    private static int _nextResolverId = 0x2000;
+    private static bool _initialized;
+
+    private sealed record NetPool(string Name, int Size, int Flags);
+
+    private sealed record ResolverContext(string Name, int PoolId, int Flags, int LastError);
+
+    [SysAbiExport(
+        Nid = "Nlev7Lg8k3A",
+        ExportName = "sceNetInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetInit(CpuContext ctx)
+    {
+        _initialized = true;
+        TraceNet("init", 0, 0, 0, 0);
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "cTGkc6-TBlI",
+        ExportName = "sceNetTerm",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetTerm(CpuContext ctx)
+    {
+        _initialized = false;
+        _pools.Clear();
+        _resolvers.Clear();
+        TraceNet("term", 0, 0, 0, 0);
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "dgJBaeJnGpo",
+        ExportName = "sceNetPoolCreate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetPoolCreate(CpuContext ctx)
+    {
+        var nameAddress = ctx[CpuRegister.Rdi];
+        var size = unchecked((int)ctx[CpuRegister.Rsi]);
+        var flags = unchecked((int)ctx[CpuRegister.Rdx]);
+
+        if (size <= 0)
+        {
+            return SetReturn(ctx, NetErrorInvalidArgument);
+        }
+
+        var name = TryReadUtf8Z(ctx, nameAddress, MaxNameLength, out var value)
+            ? value
+            : string.Empty;
+
+        var id = Interlocked.Increment(ref _nextPoolId);
+        _pools[id] = new NetPool(name, size, flags);
+
+        TraceNet("pool.create", id, unchecked((ulong)size), unchecked((ulong)flags), _initialized ? 1UL : 0UL);
+        ctx[CpuRegister.Rax] = unchecked((ulong)id);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "K7RlrTkI-mw",
+        ExportName = "sceNetPoolDestroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetPoolDestroy(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        if (!_pools.TryRemove(id, out _))
+        {
+            return SetReturn(ctx, NetErrorBadFileDescriptor);
+        }
+
+        TraceNet("pool.destroy", id, 0, 0, _initialized ? 1UL : 0UL);
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "C4UgDHHPvdw",
+        ExportName = "sceNetResolverCreate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetResolverCreate(CpuContext ctx)
+    {
+        var nameAddress = ctx[CpuRegister.Rdi];
+        var poolId = unchecked((int)ctx[CpuRegister.Rsi]);
+        var flags = unchecked((int)ctx[CpuRegister.Rdx]);
+        if (flags != 0)
+        {
+            return SetReturn(ctx, NetErrorInvalidArgument);
+        }
+
+        var name = TryReadUtf8Z(ctx, nameAddress, MaxNameLength, out var value)
+            ? value
+            : string.Empty;
+        var id = Interlocked.Increment(ref _nextResolverId);
+        _resolvers[id] = new ResolverContext(name, poolId, flags, 0);
+        TraceNet("resolver.create", id, unchecked((ulong)poolId), unchecked((ulong)flags), _initialized ? 1UL : 0UL);
+        ctx[CpuRegister.Rax] = unchecked((ulong)id);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "kJlYH5uMAWI",
+        ExportName = "sceNetResolverDestroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetResolverDestroy(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        return _resolvers.TryRemove(id, out _)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, NetErrorBadFileDescriptor);
+    }
+
+    [SysAbiExport(
+        Nid = "J5i3hiLJMPk",
+        ExportName = "sceNetResolverGetError",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetResolverGetError(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        var statusAddress = ctx[CpuRegister.Rsi];
+        if (statusAddress == 0)
+        {
+            return SetReturn(ctx, NetErrorInvalidArgument);
+        }
+
+        if (!_resolvers.TryGetValue(id, out var resolver))
+        {
+            return SetReturn(ctx, NetErrorBadFileDescriptor);
+        }
+
+        Span<byte> status = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(status, resolver.LastError);
+        return ctx.Memory.TryWrite(statusAddress, status)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static bool TryReadUtf8Z(CpuContext ctx, ulong address, int maxLength, out string value)
+    {
+        value = string.Empty;
+        if (address == 0)
+        {
+            return true;
+        }
+
+        Span<byte> one = stackalloc byte[1];
+        var bytes = new byte[maxLength];
+        var count = 0;
+        for (; count < maxLength; count++)
+        {
+            if (!ctx.Memory.TryRead(address + (ulong)count, one))
+            {
+                return false;
+            }
+
+            if (one[0] == 0)
+            {
+                break;
+            }
+
+            bytes[count] = one[0];
+        }
+
+        value = Encoding.UTF8.GetString(bytes, 0, count);
+        return true;
+    }
+
+    private static void TraceNet(string operation, int id, ulong arg0, ulong arg1, ulong arg2)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_NET"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] net.{operation} id={id} arg0=0x{arg0:X16} arg1=0x{arg1:X16} arg2=0x{arg2:X16}");
+    }
+}

src/SharpEmu.Libs/Network/SslExports.cs

@@ -0,0 +1,87 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System;
+using System.Collections.Concurrent;
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Network;
+
+public static class SslExports
+{
+    private const int SslErrorInvalidId = unchecked((int)0x8095F006);
+    private const int SslErrorOutOfSize = unchecked((int)0x8095F008);
+
+    private static readonly ConcurrentDictionary<int, SslContext> _contexts = new();
+    private static int _nextContextId;
+
+    private sealed record SslContext(ulong PoolSize);
+
+    [SysAbiExport(
+        Nid = "hdpVEUDFW3s",
+        ExportName = "sceSslInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSsl")]
+    public static int SslInit(CpuContext ctx)
+    {
+        var poolSize = ctx[CpuRegister.Rdi];
+        if (poolSize == 0)
+        {
+            return SetReturn(ctx, SslErrorOutOfSize);
+        }
+
+        var id = Interlocked.Increment(ref _nextContextId);
+        _contexts[id] = new SslContext(poolSize);
+
+        TraceSsl("init", id, poolSize);
+        ctx[CpuRegister.Rax] = unchecked((ulong)id);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "0K1yQ6Lv-Yc",
+        ExportName = "sceSslTerm",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSsl")]
+    public static int SslTerm(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        if (!_contexts.TryRemove(id, out _))
+        {
+            return SetReturn(ctx, SslErrorInvalidId);
+        }
+
+        TraceSsl("term", id, 0);
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "viRXSHZYd0c",
+        ExportName = "sceSslClose",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSsl")]
+    public static int SslClose(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        TraceSsl("close", id, 0);
+        return SetReturn(ctx, 0);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceSsl(string operation, int id, ulong arg0)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_SSL"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] ssl.{operation} id={id} arg0=0x{arg0:X16}");
+    }
+}

src/SharpEmu.Libs/Ngs2/Ngs2Exports.cs

@@ -0,0 +1,322 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using SharpEmu.Libs.Kernel;
+using System.Buffers.Binary;
+using System.Threading;
+
+namespace SharpEmu.Libs.Ngs2;
+
+public static class Ngs2Exports
+{
+    private const int OrbisNgs2ErrorInvalidOutAddress = unchecked((int)0x804A0053);
+    private const int OrbisNgs2ErrorInvalidSystemHandle = unchecked((int)0x804A0230);
+    private const int OrbisNgs2ErrorInvalidRackHandle = unchecked((int)0x804A0261);
+    private const int OrbisNgs2ErrorInvalidVoiceHandle = unchecked((int)0x804A0300);
+    private const ulong HandleStorageSize = 0x20;
+    private const int RenderBufferInfoSize = 0x18;
+    private const ulong MaximumRenderBufferSize = 16 * 1024 * 1024;
+
+    private static readonly object StateGate = new();
+    private static readonly Dictionary<ulong, SystemState> Systems = new();
+    private static readonly Dictionary<ulong, RackState> Racks = new();
+    private static readonly Dictionary<ulong, VoiceState> Voices = new();
+    private static long _nextUid;
+    private static long _renderCount;
+
+    private sealed record SystemState(uint Uid);
+    private sealed record RackState(ulong SystemHandle, uint RackId);
+    private sealed record VoiceState(ulong RackHandle, uint VoiceIndex);
+
+    [SysAbiExport(
+        Nid = "mPYgU4oYpuY",
+        ExportName = "sceNgs2SystemCreateWithAllocator",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2SystemCreateWithAllocator(CpuContext ctx)
+    {
+        var outHandleAddress = ctx[CpuRegister.Rdx];
+        if (outHandleAddress == 0)
+        {
+            return SetReturn(ctx, OrbisNgs2ErrorInvalidOutAddress);
+        }
+
+        if (!TryCreateHandle(ctx, type: 1, ownerHandle: 0, out var handle) ||
+            !ctx.TryWriteUInt64(outHandleAddress, handle))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        lock (StateGate)
+        {
+            Systems[handle] = new SystemState(unchecked((uint)Interlocked.Increment(ref _nextUid)));
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "u-WrYDaJA3k",
+        ExportName = "sceNgs2SystemDestroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2SystemDestroy(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        lock (StateGate)
+        {
+            if (!Systems.Remove(handle))
+            {
+                return SetReturn(ctx, OrbisNgs2ErrorInvalidSystemHandle);
+            }
+
+            var rackHandles = Racks
+                .Where(pair => pair.Value.SystemHandle == handle)
+                .Select(pair => pair.Key)
+                .ToArray();
+            foreach (var rackHandle in rackHandles)
+            {
+                RemoveRackLocked(rackHandle);
+            }
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "U546k6orxQo",
+        ExportName = "sceNgs2RackCreateWithAllocator",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2RackCreateWithAllocator(CpuContext ctx)
+    {
+        var systemHandle = ctx[CpuRegister.Rdi];
+        var rackId = unchecked((uint)ctx[CpuRegister.Rsi]);
+        var outHandleAddress = ctx[CpuRegister.R8];
+        lock (StateGate)
+        {
+            if (!Systems.ContainsKey(systemHandle))
+            {
+                return SetReturn(ctx, OrbisNgs2ErrorInvalidSystemHandle);
+            }
+        }
+
+        if (outHandleAddress == 0)
+        {
+            return SetReturn(ctx, OrbisNgs2ErrorInvalidOutAddress);
+        }
+
+        if (!TryCreateHandle(ctx, type: 2, systemHandle, out var handle) ||
+            !ctx.TryWriteUInt64(outHandleAddress, handle))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        lock (StateGate)
+        {
+            Racks[handle] = new RackState(systemHandle, rackId);
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "lCqD7oycmIM",
+        ExportName = "sceNgs2RackDestroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2RackDestroy(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        lock (StateGate)
+        {
+            if (!Racks.ContainsKey(handle))
+            {
+                return SetReturn(ctx, OrbisNgs2ErrorInvalidRackHandle);
+            }
+
+            RemoveRackLocked(handle);
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "MwmHz8pAdAo",
+        ExportName = "sceNgs2RackGetVoiceHandle",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2RackGetVoiceHandle(CpuContext ctx)
+    {
+        var rackHandle = ctx[CpuRegister.Rdi];
+        var voiceIndex = unchecked((uint)ctx[CpuRegister.Rsi]);
+        var outHandleAddress = ctx[CpuRegister.Rdx];
+        lock (StateGate)
+        {
+            if (!Racks.ContainsKey(rackHandle))
+            {
+                return SetReturn(ctx, OrbisNgs2ErrorInvalidRackHandle);
+            }
+
+            var existing = Voices.FirstOrDefault(
+                pair => pair.Value.RackHandle == rackHandle && pair.Value.VoiceIndex == voiceIndex);
+            if (existing.Key != 0)
+            {
+                return ctx.TryWriteUInt64(outHandleAddress, existing.Key)
+                    ? SetReturn(ctx, 0)
+                    : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+        }
+
+        if (outHandleAddress == 0)
+        {
+            return SetReturn(ctx, OrbisNgs2ErrorInvalidOutAddress);
+        }
+
+        if (!TryCreateHandle(ctx, type: 4, rackHandle, out var handle) ||
+            !ctx.TryWriteUInt64(outHandleAddress, handle))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        lock (StateGate)
+        {
+            Voices[handle] = new VoiceState(rackHandle, voiceIndex);
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "uu94irFOGpA",
+        ExportName = "sceNgs2VoiceControl",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2VoiceControl(CpuContext ctx)
+    {
+        lock (StateGate)
+        {
+            return SetReturn(
+                ctx,
+                Voices.ContainsKey(ctx[CpuRegister.Rdi]) ? 0 : OrbisNgs2ErrorInvalidVoiceHandle);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "AbYvTOZ8Pts",
+        ExportName = "sceNgs2VoiceRunCommands",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2VoiceRunCommands(CpuContext ctx) => Ngs2VoiceControl(ctx);
+
+    [SysAbiExport(
+        Nid = "i0VnXM-C9fc",
+        ExportName = "sceNgs2SystemRender",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2SystemRender(CpuContext ctx)
+    {
+        var systemHandle = ctx[CpuRegister.Rdi];
+        var bufferInfoAddress = ctx[CpuRegister.Rsi];
+        var bufferInfoCount = unchecked((uint)ctx[CpuRegister.Rdx]);
+        lock (StateGate)
+        {
+            if (!Systems.ContainsKey(systemHandle))
+            {
+                return SetReturn(ctx, OrbisNgs2ErrorInvalidSystemHandle);
+            }
+        }
+
+        if (bufferInfoCount != 0 && bufferInfoAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        for (uint i = 0; i < bufferInfoCount; i++)
+        {
+            var entryAddress = bufferInfoAddress + (i * RenderBufferInfoSize);
+            if (!ctx.TryReadUInt64(entryAddress, out var bufferAddress) ||
+                !ctx.TryReadUInt64(entryAddress + 8, out var bufferSize))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            if (bufferAddress != 0 && bufferSize != 0)
+            {
+                if (bufferSize > MaximumRenderBufferSize || !TryClearGuestBuffer(ctx, bufferAddress, bufferSize))
+                {
+                    return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+            }
+        }
+
+        var count = Interlocked.Increment(ref _renderCount);
+        if (ShouldTrace() && (count <= 4 || count % 10_000 == 0))
+        {
+            Console.Error.WriteLine(
+                $"[LOADER][TRACE] ngs2.render#{count} system=0x{systemHandle:X16} buffers={bufferInfoCount}");
+        }
+
+        return SetReturn(ctx, 0);
+    }
+
+    private static bool TryCreateHandle(CpuContext ctx, uint type, ulong ownerHandle, out ulong handle)
+    {
+        handle = 0;
+        if (!KernelMemoryCompatExports.TryAllocateHleData(ctx, HandleStorageSize, 16, out handle))
+        {
+            return false;
+        }
+
+        Span<byte> data = stackalloc byte[(int)HandleStorageSize];
+        data.Clear();
+        BinaryPrimitives.WriteUInt64LittleEndian(data[0..8], handle);
+        BinaryPrimitives.WriteUInt64LittleEndian(data[8..16], ownerHandle);
+        BinaryPrimitives.WriteUInt32LittleEndian(data[16..20], 1);
+        BinaryPrimitives.WriteUInt32LittleEndian(data[24..28], type);
+        return ctx.Memory.TryWrite(handle, data);
+    }
+
+    private static bool TryClearGuestBuffer(CpuContext ctx, ulong address, ulong length)
+    {
+        Span<byte> zeroes = stackalloc byte[4096];
+        zeroes.Clear();
+        for (ulong offset = 0; offset < length;)
+        {
+            var chunkSize = (int)Math.Min((ulong)zeroes.Length, length - offset);
+            if (!ctx.Memory.TryWrite(address + offset, zeroes[..chunkSize]))
+            {
+                return false;
+            }
+
+            offset += unchecked((uint)chunkSize);
+        }
+
+        return true;
+    }
+
+    private static void RemoveRackLocked(ulong rackHandle)
+    {
+        Racks.Remove(rackHandle);
+        foreach (var voiceHandle in Voices
+                     .Where(pair => pair.Value.RackHandle == rackHandle)
+                     .Select(pair => pair.Key)
+                     .ToArray())
+        {
+            Voices.Remove(voiceHandle);
+        }
+    }
+
+    private static bool ShouldTrace() =>
+        string.Equals(
+            Environment.GetEnvironmentVariable("SHARPEMU_LOG_NGS2"),
+            "1",
+            StringComparison.Ordinal);
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/Np/NpEntitlementAccessExports.cs

@@ -0,0 +1,76 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Np;
+
+public static class NpEntitlementAccessExports
+{
+    private const int BootParamClearSize = 0x20;
+    private const int EmptyAddcontInfoListSize = 0x10;
+
+    [SysAbiExport(
+        Nid = "jO8DM8oyego",
+        ExportName = "sceNpEntitlementAccessInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpEntitlementAccess")]
+    public static int NpEntitlementAccessInitialize(CpuContext ctx)
+    {
+        var initParam = ctx[CpuRegister.Rdi];
+        var bootParam = ctx[CpuRegister.Rsi];
+
+        if (bootParam != 0)
+        {
+            Span<byte> clear = stackalloc byte[BootParamClearSize];
+            clear.Clear();
+            if (!ctx.Memory.TryWrite(bootParam, clear))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+        }
+
+        TraceNpEntitlementAccess($"initialize init=0x{initParam:X16} boot=0x{bootParam:X16}");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "TFyU+KFBv54",
+        ExportName = "sceNpEntitlementAccessGetAddcontEntitlementInfoList",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpEntitlementAccess")]
+    public static int NpEntitlementAccessGetAddcontEntitlementInfoList(CpuContext ctx)
+    {
+        var listAddress = ctx[CpuRegister.Rsi];
+        if (listAddress != 0)
+        {
+            Span<byte> emptyList = stackalloc byte[EmptyAddcontInfoListSize];
+            emptyList.Clear();
+            if (!ctx.Memory.TryWrite(listAddress, emptyList))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+        }
+
+        TraceNpEntitlementAccess(
+            $"get_addcont_info_list service=0x{ctx[CpuRegister.Rdi]:X16} list=0x{listAddress:X16} " +
+            $"max={ctx[CpuRegister.Rdx]} flags=0x{ctx[CpuRegister.Rcx]:X16} -> empty");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
+
+    private static void TraceNpEntitlementAccess(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_NP"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] np.entitlement.{message}");
+    }
+}

src/SharpEmu.Libs/Np/NpManagerExports.cs

@@ -0,0 +1,143 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+
+namespace SharpEmu.Libs.Np;
+
+public static class NpManagerExports
+{
+    private const int NpTitleIdSize = 16;
+    private const int NpTitleSecretSize = 128;
+
+    [SysAbiExport(
+        Nid = "3Zl8BePTh9Y",
+        ExportName = "sceNpCheckCallback",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpManager")]
+    public static int NpCheckCallback(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "JELHf4xPufo",
+        ExportName = "sceNpCheckCallbackForLib",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpManager")]
+    public static int NpCheckCallbackForLib(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "VfRSmPmj8Q8",
+        ExportName = "sceNpRegisterStateCallback",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpManager")]
+    public static int NpRegisterStateCallback(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "qQJfO8HAiaY",
+        ExportName = "sceNpRegisterStateCallbackA",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpManager")]
+    public static int NpRegisterStateCallbackA(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "0c7HbXRKUt4",
+        ExportName = "sceNpRegisterStateCallbackForToolkit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpManagerForToolkit")]
+    public static int NpRegisterStateCallbackForToolkit(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "eQH7nWPcAgc",
+        ExportName = "sceNpGetState",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpManager")]
+    public static int NpGetState(CpuContext ctx)
+    {
+        var stateAddress = ctx[CpuRegister.Rsi];
+        if (stateAddress == 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> stateBytes = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(stateBytes, 1);
+        return ctx.Memory.TryWrite(stateAddress, stateBytes)
+            ? SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK)
+            : SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "Ec63y59l9tw",
+        ExportName = "sceNpSetNpTitleId",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpManager")]
+    public static int NpSetNpTitleId(CpuContext ctx)
+    {
+        var titleIdAddress = ctx[CpuRegister.Rdi];
+        var titleSecretAddress = ctx[CpuRegister.Rsi];
+        if (titleIdAddress == 0 || titleSecretAddress == 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> titleId = stackalloc byte[NpTitleIdSize];
+        Span<byte> titleSecret = stackalloc byte[NpTitleSecretSize];
+        if (!ctx.Memory.TryRead(titleIdAddress, titleId) ||
+            !ctx.Memory.TryRead(titleSecretAddress, titleSecret))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceNp($"set_np_title_id title='{ReadTitleId(titleId)}'");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
+
+    private static string ReadTitleId(ReadOnlySpan<byte> bytes)
+    {
+        var length = 0;
+        while (length < 12 && length < bytes.Length && bytes[length] != 0)
+        {
+            length++;
+        }
+
+        return length == 0
+            ? string.Empty
+            : System.Text.Encoding.ASCII.GetString(bytes[..length]);
+    }
+
+    private static void TraceNp(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_NP"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] np.{message}");
+    }
+}

src/SharpEmu.Libs/Np/NpSessionSignalingExports.cs

@@ -0,0 +1,20 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Np;
+
+public static class NpSessionSignalingExports
+{
+    [SysAbiExport(
+        Nid = "ysmw6J-P8Ak",
+        ExportName = "sceNpSessionSignalingInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpSessionSignaling")]
+    public static int NpSessionSignalingInitialize(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+}

src/SharpEmu.Libs/Np/NpUniversalDataSystemExports.cs

@@ -0,0 +1,98 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Threading;
+
+namespace SharpEmu.Libs.Np;
+
+public static class NpUniversalDataSystemExports
+{
+    private const int NpUniversalDataSystemErrorInvalidArgument = unchecked((int)0x80553102);
+    private static int _nextHandle = 1;
+
+    [SysAbiExport(
+        Nid = "sjaobBgqeB4",
+        ExportName = "sceNpUniversalDataSystemInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpUniversalDataSystem")]
+    public static int NpUniversalDataSystemInitialize(CpuContext ctx)
+    {
+        var parameterAddress = ctx[CpuRegister.Rdi];
+        if (parameterAddress == 0)
+        {
+            return SetReturn(ctx, NpUniversalDataSystemErrorInvalidArgument);
+        }
+
+        Span<byte> parameters = stackalloc byte[16];
+        return ctx.Memory.TryRead(parameterAddress, parameters)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "5zBnau1uIEo",
+        ExportName = "sceNpUniversalDataSystemCreateContext",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpUniversalDataSystem")]
+    public static int NpUniversalDataSystemCreateContext(CpuContext ctx)
+    {
+        var contextAddress = ctx[CpuRegister.Rdi];
+        if (contextAddress == 0)
+        {
+            return SetReturn(ctx, 0);
+        }
+
+        Span<byte> context = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(context, 1);
+        return ctx.Memory.TryWrite(contextAddress, context)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "hT0IAEvN+M0",
+        ExportName = "sceNpUniversalDataSystemCreateHandle",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpUniversalDataSystem")]
+    public static int NpUniversalDataSystemCreateHandle(CpuContext ctx)
+    {
+        var handle = Interlocked.Increment(ref _nextHandle);
+        if (TryWriteInt32(ctx, ctx[CpuRegister.Rdi], handle) ||
+            TryWriteInt32(ctx, ctx[CpuRegister.Rsi], handle))
+        {
+            return SetReturn(ctx, 0);
+        }
+
+        return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "tpFJ8LIKvPw",
+        ExportName = "sceNpUniversalDataSystemRegisterContext",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpUniversalDataSystem")]
+    public static int NpUniversalDataSystemRegisterContext(CpuContext ctx)
+    {
+        return SetReturn(ctx, 0);
+    }
+
+    private static bool TryWriteInt32(CpuContext ctx, ulong address, int value)
+    {
+        if (address == 0)
+        {
+            return false;
+        }
+
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(bytes, value);
+        return ctx.Memory.TryWrite(address, bytes);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(long)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/Np/NpWebApi2Exports.cs

@@ -0,0 +1,65 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System;
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Np;
+
+public static class NpWebApi2Exports
+{
+    private const int NpWebApi2ErrorInvalidArgument = unchecked((int)0x80553402);
+
+    private static int _initialized;
+
+    [SysAbiExport(
+        Nid = "+o9816YQhqQ",
+        ExportName = "sceNpWebApi2Initialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpWebApi2")]
+    public static int NpWebApi2Initialize(CpuContext ctx)
+    {
+        var httpContextId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var poolSize = ctx[CpuRegister.Rsi];
+
+        if (httpContextId <= 0 || poolSize == 0)
+        {
+            return SetReturn(ctx, NpWebApi2ErrorInvalidArgument);
+        }
+
+        Interlocked.Exchange(ref _initialized, 1);
+        TraceNpWebApi2("init", httpContextId, poolSize);
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "bEvXpcEk200",
+        ExportName = "sceNpWebApi2Terminate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpWebApi2")]
+    public static int NpWebApi2Terminate(CpuContext ctx)
+    {
+        var libraryContextId = unchecked((int)ctx[CpuRegister.Rdi]);
+        Interlocked.Exchange(ref _initialized, 0);
+        TraceNpWebApi2("term", libraryContextId, 0);
+        return SetReturn(ctx, 0);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceNpWebApi2(string operation, int id, ulong arg0)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_NP_WEB_API2"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] npwebapi2.{operation} id={id} arg0=0x{arg0:X16} initialized={Volatile.Read(ref _initialized)}");
+    }
+}

src/SharpEmu.Libs/NpGameIntent/NpGameIntentExports.cs

@@ -0,0 +1,24 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.NpGameIntent;
+
+public static class NpGameIntentExports
+{
+    private static int _initialized;
+
+    [SysAbiExport(
+        Nid = "m87BHxt-H60",
+        ExportName = "sceNpGameIntentInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpGameIntent")]
+    public static int NpGameIntentInitialize(CpuContext ctx)
+    {
+        Interlocked.Exchange(ref _initialized, 1);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+}

src/SharpEmu.Libs/Pad/PadExports.cs

@@ -0,0 +1,263 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace SharpEmu.Libs.Pad;
+
+public static class PadExports
+{
+    private const int OrbisPadErrorInvalidHandle = unchecked((int)0x80920003);
+    private const int OrbisPadErrorNotInitialized = unchecked((int)0x80920005);
+    private const int OrbisPadErrorDeviceNotConnected = unchecked((int)0x80920007);
+    private const int OrbisPadErrorDeviceNoHandle = unchecked((int)0x80920008);
+    private const int PrimaryUserId = 1;
+    private const int StandardPortType = 0;
+    private const int PrimaryPadHandle = 1;
+    private const int ControllerInformationSize = 0x1C;
+    private const int PadDataSize = 0x78;
+
+    private static bool _initialized;
+
+    [SysAbiExport(
+        Nid = "hv1luiJrqQM",
+        ExportName = "scePadInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePad")]
+    public static int PadInit(CpuContext ctx)
+    {
+        _initialized = true;
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "xk0AcarP3V4",
+        ExportName = "scePadOpen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePad")]
+    public static int PadOpen(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var type = unchecked((int)ctx[CpuRegister.Rsi]);
+        var index = unchecked((int)ctx[CpuRegister.Rdx]);
+        var parameterAddress = ctx[CpuRegister.Rcx];
+        if (!_initialized)
+        {
+            return SetReturn(ctx, OrbisPadErrorNotInitialized);
+        }
+
+        if (userId == -1)
+        {
+            return SetReturn(ctx, OrbisPadErrorDeviceNoHandle);
+        }
+
+        if (userId != PrimaryUserId || type != StandardPortType || index != 0 || parameterAddress != 0)
+        {
+            return SetReturn(ctx, OrbisPadErrorDeviceNotConnected);
+        }
+
+        Console.Error.WriteLine("[LOADER][INFO] Keyboard controls: Arrow keys = D-pad, WASD = left stick, IJKL = right stick, Z/Enter = Cross, X/Esc = Circle, C = Square, V = Triangle, Q = L1, E = R1, R = L2, F = R2, Tab/Backspace = Options");
+        return SetReturn(ctx, PrimaryPadHandle);
+    }
+
+    [SysAbiExport(
+        Nid = "clVvL4ZDntw",
+        ExportName = "scePadSetMotionSensorState",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePad")]
+    public static int PadSetMotionSensorState(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        return handle == PrimaryPadHandle
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, OrbisPadErrorInvalidHandle);
+    }
+
+    [SysAbiExport(
+        Nid = "gjP9-KQzoUk",
+        ExportName = "scePadGetControllerInformation",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePad")]
+    public static int PadGetControllerInformation(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        var informationAddress = ctx[CpuRegister.Rsi];
+        if (handle != PrimaryPadHandle)
+        {
+            return SetReturn(ctx, OrbisPadErrorInvalidHandle);
+        }
+
+        if (informationAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> information = stackalloc byte[ControllerInformationSize];
+        BinaryPrimitives.WriteSingleLittleEndian(information[0x00..], 44.86f);
+        BinaryPrimitives.WriteUInt16LittleEndian(information[0x04..], 1920);
+        BinaryPrimitives.WriteUInt16LittleEndian(information[0x06..], 943);
+        information[0x08] = 30;
+        information[0x09] = 30;
+        information[0x0A] = StandardPortType;
+        information[0x0B] = 1;
+        information[0x0C] = 1;
+        BinaryPrimitives.WriteInt32LittleEndian(information[0x10..], 0);
+
+        return ctx.Memory.TryWrite(informationAddress, information)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "YndgXqQVV7c",
+        ExportName = "scePadReadState",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePad")]
+    public static int PadReadState(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        var dataAddress = ctx[CpuRegister.Rsi];
+        if (handle != PrimaryPadHandle)
+        {
+            return SetReturn(ctx, OrbisPadErrorInvalidHandle);
+        }
+
+        if (dataAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        return WriteNeutralPadData(ctx, dataAddress)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "q1cHNfGycLI",
+        ExportName = "scePadRead",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePad")]
+    public static int PadRead(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        var dataAddress = ctx[CpuRegister.Rsi];
+        var count = unchecked((int)ctx[CpuRegister.Rdx]);
+        if (handle != PrimaryPadHandle)
+        {
+            return SetReturn(ctx, OrbisPadErrorInvalidHandle);
+        }
+
+        if (dataAddress == 0 || count < 1 || count > 64)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        return WriteNeutralPadData(ctx, dataAddress)
+            ? SetReturn(ctx, 1)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+    Nid = "W2G-yoyMF5U",
+    ExportName = "scePadSetVibrationMode",
+    Target = Generation.Gen4 | Generation.Gen5,
+    LibraryName = "libScePad")]
+    public static int PadSetVibrationMode(CpuContext ctx)
+    {
+        return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static bool WriteNeutralPadData(CpuContext ctx, ulong dataAddress)
+    {
+        Span<byte> data = stackalloc byte[PadDataSize];
+        data.Clear();
+        var acceptsKeyboardInput = IsEmulatorWindowFocused();
+        var buttons = acceptsKeyboardInput ? ReadKeyboardButtons() : 0;
+        BinaryPrimitives.WriteUInt32LittleEndian(data[0x00..], buttons);
+        var leftX = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x41), IsKeyDown(0x44)) : (byte)128;
+        var leftY = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x57), IsKeyDown(0x53)) : (byte)128;
+        var rightX = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x4A), IsKeyDown(0x4C)) : (byte)128;
+        var rightY = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x49), IsKeyDown(0x4B)) : (byte)128;
+        data[0x04] = leftX;
+        data[0x05] = leftY;
+        data[0x06] = rightX;
+        data[0x07] = rightY;
+        data[0x08] = acceptsKeyboardInput && IsKeyDown(0x52) ? (byte)255 : (byte)0;
+        data[0x09] = acceptsKeyboardInput && IsKeyDown(0x46) ? (byte)255 : (byte)0;
+        BinaryPrimitives.WriteSingleLittleEndian(data[0x18..], 1.0f);
+        data[0x4C] = 1;
+        var timestampTicks = Stopwatch.GetTimestamp();
+        var timestampMicroseconds =
+            ((ulong)(timestampTicks / Stopwatch.Frequency) * 1_000_000UL) +
+            ((ulong)(timestampTicks % Stopwatch.Frequency) * 1_000_000UL / (ulong)Stopwatch.Frequency);
+        BinaryPrimitives.WriteUInt64LittleEndian(
+            data[0x50..],
+            timestampMicroseconds);
+        data[0x68] = 1;
+
+        return ctx.Memory.TryWrite(dataAddress, data);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    [DllImport("user32.dll")]
+    private static extern short GetAsyncKeyState(int vKey);
+
+    [DllImport("user32.dll")]
+    private static extern nint GetForegroundWindow();
+
+    [DllImport("user32.dll")]
+    private static extern uint GetWindowThreadProcessId(nint hWnd, out uint processId);
+
+    private static bool IsKeyDown(int vk) =>
+        (GetAsyncKeyState(vk) & 0x8000) != 0;
+
+    private static bool IsEmulatorWindowFocused()
+    {
+        var foregroundWindow = GetForegroundWindow();
+        if (foregroundWindow == 0)
+        {
+            return false;
+        }
+
+        GetWindowThreadProcessId(foregroundWindow, out var processId);
+        return processId == (uint)Environment.ProcessId;
+    }
+
+    private static uint ReadKeyboardButtons()
+    {
+        uint buttons = 0;
+        // D-pad
+        if (IsKeyDown(0x25)) buttons |= 0x0080; // Left
+        if (IsKeyDown(0x27)) buttons |= 0x0020; // Right
+        if (IsKeyDown(0x26)) buttons |= 0x0010; // Up
+        if (IsKeyDown(0x28)) buttons |= 0x0040; // Down
+        // Face buttons
+        if (IsKeyDown(0x5A) || IsKeyDown(0x0D)) buttons |= 0x4000; // Z / Enter = Cross
+        if (IsKeyDown(0x58) || IsKeyDown(0x1B)) buttons |= 0x2000; // X / Escape = Circle
+        if (IsKeyDown(0x43)) buttons |= 0x8000; // C = Square
+        if (IsKeyDown(0x56)) buttons |= 0x1000; // V = Triangle
+        // Shoulder buttons
+        if (IsKeyDown(0x51)) buttons |= 0x0400; // Q = L1
+        if (IsKeyDown(0x45)) buttons |= 0x0800; // E = R1
+        if (IsKeyDown(0x52)) buttons |= 0x0100; // R = L2 (digital)
+        if (IsKeyDown(0x46)) buttons |= 0x0200; // F = R2 (digital)
+        // Options (Start)
+        if (IsKeyDown(0x09) || IsKeyDown(0x08)) buttons |= 0x0008; // Tab / Backspace = Options
+        return buttons;
+    }
+
+    private static byte ReadAnalogStick(bool negative, bool positive)
+    {
+        if (negative && !positive) return 0;
+        if (positive && !negative) return 255;
+        return 128;
+    }
+}

src/SharpEmu.Libs/PlayGo/PlayGoExports.cs

@@ -0,0 +1,792 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Text.RegularExpressions;
+
+namespace SharpEmu.Libs.PlayGo;
+
+public static class PlayGoExports
+{
+    private const int OrbisPlayGoErrorInvalidArgument = unchecked((int)0x80B20004);
+    private const int OrbisPlayGoErrorNotInitialized = unchecked((int)0x80B20005);
+    private const int OrbisPlayGoErrorAlreadyInitialized = unchecked((int)0x80B20006);
+    private const int OrbisPlayGoErrorBadHandle = unchecked((int)0x80B20009);
+    private const int OrbisPlayGoErrorBadPointer = unchecked((int)0x80B2000A);
+    private const int OrbisPlayGoErrorBadSize = unchecked((int)0x80B2000B);
+    private const int OrbisPlayGoErrorBadChunkId = unchecked((int)0x80B2000C);
+    private const int OrbisPlayGoErrorNotSupportPlayGo = unchecked((int)0x80B2000E);
+    private const int OrbisPlayGoErrorBadLocus = unchecked((int)0x80B20010);
+    private const ulong PlayGoInitBufAddrOffset = 0;
+    private const ulong PlayGoInitBufSizeOffset = 8;
+    private const uint PlayGoMinimumInitBufferSize = 0x200000;
+    private const uint PlayGoHandle = 1;
+    private const int PlayGoLocusNotDownloaded = 0;
+    private const int PlayGoLocusLocalSlow = 2;
+    private const int PlayGoLocusLocalFast = 3;
+    private const int PlayGoInstallSpeedSuspended = 0;
+    private const int PlayGoInstallSpeedTrickle = 1;
+    private const int PlayGoInstallSpeedFull = 2;
+    private const uint MaxPlayGoQueryEntries = 0x4000;
+    private const uint PlayGoAllEntriesSentinel = uint.MaxValue;
+
+    private static readonly Regex ChunkIdPattern = new(
+        @"<chunk\s+[^>]*\bid\s*=\s*""(?<id>\d+)""",
+        RegexOptions.CultureInvariant);
+
+    private static readonly Regex DefaultChunkPattern = new(
+        @"default_chunk\s*=\s*""(?<id>\d+)""",
+        RegexOptions.CultureInvariant);
+
+    private static readonly object _stateGate = new();
+    private static bool _initialized;
+    private static bool _opened;
+    private static PlayGoMetadata _metadata = PlayGoMetadata.Empty;
+    private static int _installSpeed = PlayGoInstallSpeedTrickle;
+    private static ulong _languageMask = ulong.MaxValue;
+    private static int _unknownChunkDiagnostics;
+    private static int _locusTraceDiagnostics;
+
+    [SysAbiExport(
+        Nid = "ts6GlZOKRrE",
+        ExportName = "scePlayGoInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoInitialize(CpuContext ctx)
+    {
+        var initParamsAddress = ctx[CpuRegister.Rdi];
+        if (initParamsAddress == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (!ctx.TryReadUInt64(initParamsAddress + PlayGoInitBufAddrOffset, out var bufferAddress))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        Span<byte> bufferSizeBytes = stackalloc byte[sizeof(uint)];
+        if (!ctx.Memory.TryRead(initParamsAddress + PlayGoInitBufSizeOffset, bufferSizeBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        var bufferSize = BinaryPrimitives.ReadUInt32LittleEndian(bufferSizeBytes);
+
+        if (bufferAddress == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (bufferSize < PlayGoMinimumInitBufferSize)
+        {
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        lock (_stateGate)
+        {
+            if (_initialized)
+            {
+                return OrbisPlayGoErrorAlreadyInitialized;
+            }
+
+            _metadata = LoadPlayGoMetadata();
+            _installSpeed = PlayGoInstallSpeedTrickle;
+            _languageMask = ulong.MaxValue;
+            _opened = false;
+            _initialized = true;
+            TracePlayGo($"initialize chunks={_metadata.ChunkIds.Length} available={_metadata.Available}");
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "M1Gma1ocrGE",
+        ExportName = "scePlayGoOpen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoOpen(CpuContext ctx)
+    {
+        var outHandleAddress = ctx[CpuRegister.Rdi];
+        var paramAddress = ctx[CpuRegister.Rsi];
+        if (outHandleAddress == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (paramAddress != 0)
+        {
+            return OrbisPlayGoErrorInvalidArgument;
+        }
+
+        lock (_stateGate)
+        {
+            if (!_initialized)
+            {
+                return OrbisPlayGoErrorNotInitialized;
+            }
+
+            if (!_metadata.Available)
+            {
+                return OrbisPlayGoErrorNotSupportPlayGo;
+            }
+
+            _opened = true;
+            TracePlayGo($"open handle={PlayGoHandle} chunks={_metadata.ChunkIds.Length}");
+        }
+
+        Span<byte> handleBytes = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(handleBytes, PlayGoHandle);
+        if (!ctx.Memory.TryWrite(outHandleAddress, handleBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "MPe0EeBGM-E",
+        ExportName = "scePlayGoTerminate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoTerminate(CpuContext ctx)
+    {
+        _ = ctx;
+        lock (_stateGate)
+        {
+            if (!_initialized)
+            {
+                return OrbisPlayGoErrorNotInitialized;
+            }
+
+            _initialized = false;
+            _opened = false;
+            _metadata = PlayGoMetadata.Empty;
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "Uco1I0dlDi8",
+        ExportName = "scePlayGoClose",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoClose(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        lock (_stateGate)
+        {
+            if (!_initialized)
+            {
+                return OrbisPlayGoErrorNotInitialized;
+            }
+
+            if (handle != PlayGoHandle)
+            {
+                return OrbisPlayGoErrorBadHandle;
+            }
+
+            _opened = false;
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "73fF1MFU8hA",
+        ExportName = "scePlayGoGetChunkId",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoGetChunkId(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var outChunkIdList = ctx[CpuRegister.Rsi];
+        var numberOfEntries = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var outEntries = ctx[CpuRegister.Rcx];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (outEntries == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (outChunkIdList != 0 && numberOfEntries == 0)
+        {
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        ushort[] chunkIds;
+        lock (_stateGate)
+        {
+            chunkIds = _metadata.ChunkIds;
+        }
+
+        var availableEntries = chunkIds.Length == 0 ? 1u : (uint)chunkIds.Length;
+        if (outChunkIdList == 0)
+        {
+            TracePlayGo($"get_chunk_id count_only entries={availableEntries} out_entries=0x{outEntries:X16}");
+            return ctx.TryWriteUInt32(outEntries, availableEntries)
+                ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+                : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        var entriesToWrite = Math.Min(numberOfEntries, availableEntries);
+        if (entriesToWrite > MaxPlayGoQueryEntries)
+        {
+            TracePlayGo($"get_chunk_id bad_size requested={numberOfEntries} available={availableEntries}");
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        for (uint i = 0; i < entriesToWrite; i++)
+        {
+            var chunkId = chunkIds.Length == 0 ? (ushort)0 : chunkIds[i];
+            if (!TryWriteUInt16(ctx, outChunkIdList + (i * sizeof(ushort)), chunkId))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+        }
+
+        TracePlayGo($"get_chunk_id write requested={numberOfEntries} wrote={entriesToWrite} available={availableEntries}");
+        return ctx.TryWriteUInt32(outEntries, entriesToWrite)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "v6EZ-YWRdMs",
+        ExportName = "scePlayGoGetEta",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoGetEta(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var chunkIds = ctx[CpuRegister.Rsi];
+        var numberOfEntries = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var outEta = ctx[CpuRegister.Rcx];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (chunkIds == 0 || outEta == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (numberOfEntries == 0 || numberOfEntries > MaxPlayGoQueryEntries)
+        {
+            TracePlayGo($"get_eta bad_size entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outEta:X16}");
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        return ValidateChunkIds(ctx, chunkIds, numberOfEntries) is { } chunkError && chunkError != 0
+            ? chunkError
+            : TryWriteInt64(ctx, outEta, 0)
+                ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+                : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "rvBSfTimejE",
+        ExportName = "scePlayGoGetInstallSpeed",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoGetInstallSpeed(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var outSpeed = ctx[CpuRegister.Rsi];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (outSpeed == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        int speed;
+        lock (_stateGate)
+        {
+            speed = _installSpeed;
+        }
+
+        return TryWriteInt32(ctx, outSpeed, speed)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "3OMbYZBaa50",
+        ExportName = "scePlayGoGetLanguageMask",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoGetLanguageMask(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var outLanguageMask = ctx[CpuRegister.Rsi];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (outLanguageMask == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        ulong languageMask;
+        lock (_stateGate)
+        {
+            languageMask = _languageMask;
+        }
+
+        return ctx.TryWriteUInt64(outLanguageMask, languageMask)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "uWIYLFkkwqk",
+        ExportName = "scePlayGoGetLocus",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoGetLocus(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var chunkIds = ctx[CpuRegister.Rsi];
+        var numberOfEntries = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var outLoci = ctx[CpuRegister.Rcx];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (chunkIds == 0 || outLoci == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (numberOfEntries == PlayGoAllEntriesSentinel)
+        {
+            TracePlayGo($"get_locus sentinel entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outLoci:X16}");
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (numberOfEntries == 0 || numberOfEntries > MaxPlayGoQueryEntries)
+        {
+            TracePlayGo($"get_locus bad_size entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outLoci:X16}");
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        var loci = new byte[numberOfEntries];
+        for (uint i = 0; i < numberOfEntries; i++)
+        {
+            if (!TryReadUInt16(ctx, chunkIds + (i * sizeof(ushort)), out var chunkId))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+
+            if (!IsKnownChunkId(chunkId))
+            {
+                if (Interlocked.Increment(ref _unknownChunkDiagnostics) <= 8)
+                {
+                    ushort[] knownChunkIds;
+                    lock (_stateGate)
+                    {
+                        knownChunkIds = _metadata.ChunkIds;
+                    }
+
+                    Console.Error.WriteLine(
+                        $"[LOADER][TRACE] playgo.unknown_chunk_id id={chunkId} entries={numberOfEntries} " +
+                        $"known=[{string.Join(',', knownChunkIds)}]");
+                }
+            }
+
+            loci[i] = PlayGoLocusLocalFast;
+        }
+
+        TracePlayGoLocus(numberOfEntries, chunkIds, outLoci);
+        return ctx.Memory.TryWrite(outLoci, loci)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "-RJWNMK3fC8",
+        ExportName = "scePlayGoGetProgress",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoGetProgress(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var chunkIds = ctx[CpuRegister.Rsi];
+        var numberOfEntries = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var outProgress = ctx[CpuRegister.Rcx];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (chunkIds == 0 || outProgress == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (numberOfEntries == 0 || numberOfEntries > MaxPlayGoQueryEntries)
+        {
+            TracePlayGo($"get_progress bad_size entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outProgress:X16}");
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        var chunkError = ValidateChunkIds(ctx, chunkIds, numberOfEntries);
+        if (chunkError != 0)
+        {
+            return chunkError;
+        }
+
+        TracePlayGo($"get_progress entries={numberOfEntries}");
+        Span<byte> progress = stackalloc byte[sizeof(ulong) * 2];
+        BinaryPrimitives.WriteUInt64LittleEndian(progress, 0);
+        BinaryPrimitives.WriteUInt64LittleEndian(progress[sizeof(ulong)..], 0);
+        return ctx.Memory.TryWrite(outProgress, progress)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "Nn7zKwnA5q0",
+        ExportName = "scePlayGoGetToDoList",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoGetToDoList(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var outTodoList = ctx[CpuRegister.Rsi];
+        var numberOfEntries = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var outEntries = ctx[CpuRegister.Rcx];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (outTodoList == 0 || outEntries == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (numberOfEntries == 0)
+        {
+            TracePlayGo("get_todo bad_size entries=0");
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        TracePlayGo($"get_todo requested={numberOfEntries} wrote=0");
+        return ctx.TryWriteUInt32(outEntries, 0)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "-Q1-u1a7p0g",
+        ExportName = "scePlayGoPrefetch",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoPrefetch(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var chunkIds = ctx[CpuRegister.Rsi];
+        var numberOfEntries = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var minimumLocus = unchecked((int)ctx[CpuRegister.Rcx]);
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (chunkIds == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        if (numberOfEntries == 0 || numberOfEntries > MaxPlayGoQueryEntries)
+        {
+            return OrbisPlayGoErrorBadSize;
+        }
+
+        if (minimumLocus is not PlayGoLocusNotDownloaded and not PlayGoLocusLocalSlow and not PlayGoLocusLocalFast)
+        {
+            return OrbisPlayGoErrorBadLocus;
+        }
+
+        return ValidateChunkIds(ctx, chunkIds, numberOfEntries) is { } chunkError && chunkError != 0
+            ? chunkError
+            : (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "4AAcTU9R3XM",
+        ExportName = "scePlayGoSetInstallSpeed",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoSetInstallSpeed(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var speed = unchecked((int)ctx[CpuRegister.Rsi]);
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (speed is not PlayGoInstallSpeedSuspended and not PlayGoInstallSpeedTrickle and not PlayGoInstallSpeedFull)
+        {
+            return OrbisPlayGoErrorInvalidArgument;
+        }
+
+        lock (_stateGate)
+        {
+            _installSpeed = speed;
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "LosLlHOpNqQ",
+        ExportName = "scePlayGoSetLanguageMask",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoSetLanguageMask(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var languageMask = ctx[CpuRegister.Rsi];
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        lock (_stateGate)
+        {
+            _languageMask = languageMask;
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "gUPGiOQ1tmQ",
+        ExportName = "scePlayGoSetToDoList",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePlayGo")]
+    public static int PlayGoSetToDoList(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var todoList = ctx[CpuRegister.Rsi];
+        var numberOfEntries = unchecked((uint)ctx[CpuRegister.Rdx]);
+
+        var validation = ValidateHandle(handle);
+        if (validation != 0)
+        {
+            return validation;
+        }
+
+        if (todoList == 0)
+        {
+            return OrbisPlayGoErrorBadPointer;
+        }
+
+        return numberOfEntries == 0
+            ? OrbisPlayGoErrorBadSize
+            : (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static int ValidateHandle(uint handle)
+    {
+        lock (_stateGate)
+        {
+            if (!_initialized)
+            {
+                return OrbisPlayGoErrorNotInitialized;
+            }
+
+            if (handle != PlayGoHandle || !_opened)
+            {
+                return OrbisPlayGoErrorBadHandle;
+            }
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static int ValidateChunkIds(CpuContext ctx, ulong chunkIds, uint numberOfEntries)
+    {
+        for (uint i = 0; i < numberOfEntries; i++)
+        {
+            if (!TryReadUInt16(ctx, chunkIds + (i * sizeof(ushort)), out var chunkId))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+
+            _ = chunkId;
+        }
+
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static bool IsKnownChunkId(ushort chunkId)
+    {
+        lock (_stateGate)
+        {
+            return _metadata.ChunkIds.Length == 0 || Array.BinarySearch(_metadata.ChunkIds, chunkId) >= 0;
+        }
+    }
+
+    private static PlayGoMetadata LoadPlayGoMetadata()
+    {
+        var app0Root = Environment.GetEnvironmentVariable("SHARPEMU_APP0_DIR");
+        if (string.IsNullOrWhiteSpace(app0Root))
+        {
+            return PlayGoMetadata.Empty;
+        }
+
+        var playGoDat = Path.Combine(app0Root, "sce_sys", "playgo-chunk.dat");
+        var scenarioJson = Path.Combine(app0Root, "sce_sys", "playgo-scenario.json");
+        var chunkDefsXml = Path.Combine(app0Root, "playgo-chunkdefs.xml");
+
+        var hasMetadata = File.Exists(playGoDat) || File.Exists(scenarioJson) || File.Exists(chunkDefsXml);
+        if (!hasMetadata)
+        {
+            return PlayGoMetadata.Empty;
+        }
+
+        var chunkIds = LoadChunkIds(chunkDefsXml);
+        return new PlayGoMetadata(true, chunkIds);
+    }
+
+    private static ushort[] LoadChunkIds(string chunkDefsXml)
+    {
+        if (!File.Exists(chunkDefsXml))
+        {
+            return Array.Empty<ushort>();
+        }
+
+        try
+        {
+            var xml = File.ReadAllText(chunkDefsXml);
+            var chunkIds = new HashSet<ushort>();
+            AddChunkIds(xml, DefaultChunkPattern, chunkIds);
+            AddChunkIds(xml, ChunkIdPattern, chunkIds);
+
+            var sorted = chunkIds.ToArray();
+            Array.Sort(sorted);
+            return sorted;
+        }
+        catch (IOException)
+        {
+            return Array.Empty<ushort>();
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return Array.Empty<ushort>();
+        }
+    }
+
+    private static void AddChunkIds(string xml, Regex pattern, HashSet<ushort> chunkIds)
+    {
+        foreach (Match match in pattern.Matches(xml))
+        {
+            if (ushort.TryParse(match.Groups["id"].Value, out var chunkId))
+            {
+                chunkIds.Add(chunkId);
+            }
+        }
+    }
+
+    private static bool TryReadUInt16(CpuContext ctx, ulong address, out ushort value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(ushort)];
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt16LittleEndian(buffer);
+        return true;
+    }
+
+    private static bool TryWriteUInt16(CpuContext ctx, ulong address, ushort value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(ushort)];
+        BinaryPrimitives.WriteUInt16LittleEndian(buffer, value);
+        return ctx.Memory.TryWrite(address, buffer);
+    }
+
+    private static bool TryWriteInt32(CpuContext ctx, ulong address, int value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(buffer, value);
+        return ctx.Memory.TryWrite(address, buffer);
+    }
+
+    private static bool TryWriteInt64(CpuContext ctx, ulong address, long value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(long)];
+        BinaryPrimitives.WriteInt64LittleEndian(buffer, value);
+        return ctx.Memory.TryWrite(address, buffer);
+    }
+
+    private static void TracePlayGo(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PLAYGO"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] playgo.{message}");
+        }
+    }
+
+    private static void TracePlayGoLocus(uint entries, ulong chunkIds, ulong outLoci)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PLAYGO"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        var count = Interlocked.Increment(ref _locusTraceDiagnostics);
+        if (entries != 1 || count <= 32 || count % 1000 == 0)
+        {
+            Console.Error.WriteLine(
+                $"[LOADER][TRACE] playgo.get_locus entries={entries} chunk_ids=0x{chunkIds:X16} out=0x{outLoci:X16}");
+        }
+    }
+
+    private sealed record PlayGoMetadata(bool Available, ushort[] ChunkIds)
+    {
+        public static readonly PlayGoMetadata Empty = new(false, Array.Empty<ushort>());
+    }
+}

src/SharpEmu.Libs/Rtc/RtcExports.cs

@@ -8,6 +8,8 @@ namespace SharpEmu.Libs.Rtc;
 
 public static class RtcExports
 {
+    private const long DateTimeTicksPerMicrosecond = 10;
+
     [SysAbiExport(
         Nid = "ZPD1YOKI+Kw",
         ExportName = "sceRtcGetCurrentClockLocalTime",
@@ -42,6 +44,29 @@ public static class RtcExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "18B2NS1y9UU",
+        ExportName = "sceRtcGetCurrentTick",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceRtc")]
+    public static int RtcGetCurrentTick(CpuContext ctx)
+    {
+        var tickAddress = ctx[CpuRegister.Rdi];
+        if (tickAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var tickValue = unchecked((ulong)(DateTime.UtcNow.Ticks / DateTimeTicksPerMicrosecond));
+        if (!ctx.TryWriteUInt64(tickAddress, tickValue))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "8w-H19ip48I",
         ExportName = "sceRtcGetTick",
@@ -72,14 +97,57 @@ public static class RtcExports
                 rtcDateTime.Minute,
                 rtcDateTime.Second,
                 DateTimeKind.Utc);
-            tickValue = checked((ulong)((baseDateTime.Ticks / 10) + rtcDateTime.Microsecond));
+            tickValue = checked((ulong)((baseDateTime.Ticks / DateTimeTicksPerMicrosecond) + rtcDateTime.Microsecond));
+        }
+        catch (Exception ex) when (ex is ArgumentOutOfRangeException or OverflowException)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!ctx.TryWriteUInt64(tickAddress, tickValue))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "ueega6v3GUw",
+        ExportName = "sceRtcSetTick",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceRtc")]
+    public static int RtcSetTick(CpuContext ctx)
+    {
+        var dateTimeAddress = ctx[CpuRegister.Rdi];
+        var tickAddress = ctx[CpuRegister.Rsi];
+        if (dateTimeAddress == 0 || tickAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        if (!ctx.TryReadUInt64(tickAddress, out var tickValue))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (tickValue > long.MaxValue / DateTimeTicksPerMicrosecond)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        DateTime dateTime;
+        try
+        {
+            dateTime = new DateTime(checked((long)tickValue * DateTimeTicksPerMicrosecond), DateTimeKind.Utc);
         }
         catch (ArgumentOutOfRangeException)
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        if (!ctx.TryWriteUInt64(tickAddress, tickValue))
+        if (!TryWriteRtcDateTime(ctx, dateTimeAddress, dateTime))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -108,6 +176,21 @@ public static class RtcExports
         return true;
     }
 
+    private static bool TryWriteRtcDateTime(CpuContext ctx, ulong address, DateTime dateTime)
+    {
+        Span<byte> rtcDateTime = stackalloc byte[16];
+        BinaryPrimitives.WriteUInt16LittleEndian(rtcDateTime[0..2], checked((ushort)dateTime.Year));
+        BinaryPrimitives.WriteUInt16LittleEndian(rtcDateTime[2..4], checked((ushort)dateTime.Month));
+        BinaryPrimitives.WriteUInt16LittleEndian(rtcDateTime[4..6], checked((ushort)dateTime.Day));
+        BinaryPrimitives.WriteUInt16LittleEndian(rtcDateTime[6..8], checked((ushort)dateTime.Hour));
+        BinaryPrimitives.WriteUInt16LittleEndian(rtcDateTime[8..10], checked((ushort)dateTime.Minute));
+        BinaryPrimitives.WriteUInt16LittleEndian(rtcDateTime[10..12], checked((ushort)dateTime.Second));
+        BinaryPrimitives.WriteUInt32LittleEndian(
+            rtcDateTime[12..16],
+            checked((uint)((dateTime.Ticks % TimeSpan.TicksPerSecond) / DateTimeTicksPerMicrosecond)));
+        return ctx.Memory.TryWrite(address, rtcDateTime);
+    }
+
     private readonly record struct RtcDateTime(
         ushort Year,
         ushort Month,

src/SharpEmu.Libs/SaveData/SaveDataDialogExports.cs

@@ -0,0 +1,200 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Threading;
+
+namespace SharpEmu.Libs.SaveData;
+
+public static class SaveDataDialogExports
+{
+    private const int StatusNone = 0;
+    private const int StatusInitialized = 1;
+    private const int StatusRunning = 2;
+    private const int StatusFinished = 3;
+
+    private const int ErrorOk = 0;
+    private const int ErrorNotInitialized = unchecked((int)0x80B80003);
+    private const int ErrorAlreadyInitialized = unchecked((int)0x80B80004);
+    private const int ErrorNotFinished = unchecked((int)0x80B80005);
+    private const int ErrorNotRunning = unchecked((int)0x80B8000B);
+    private const int ErrorArgNull = unchecked((int)0x80B8000D);
+
+    private const int ResultSize = 0x48;
+    private static int _status;
+    private static int _lastMode;
+    private static ulong _lastUserData;
+
+    [SysAbiExport(
+        Nid = "s9e3+YpRnzw",
+        ExportName = "sceSaveDataDialogInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogInitialize(CpuContext ctx)
+    {
+        if (Interlocked.CompareExchange(ref _status, StatusInitialized, StatusNone) != StatusNone)
+        {
+            return SetReturn(ctx, ErrorAlreadyInitialized);
+        }
+
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "4tPhsP6FpDI",
+        ExportName = "sceSaveDataDialogOpen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogOpen(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        if (paramAddress == 0)
+        {
+            return SetReturn(ctx, ErrorArgNull);
+        }
+
+        if (_status is not (StatusInitialized or StatusFinished))
+        {
+            return SetReturn(ctx, ErrorNotInitialized);
+        }
+
+        _lastMode = TryReadInt32(ctx, paramAddress, out var mode) ? mode : 0;
+        _lastUserData = ctx.TryReadUInt64(paramAddress + 0xC8, out var userData) ? userData : 0;
+
+        // There is no host save dialog yet. Complete immediately with OK so
+        // guest polling sees a finished dialog instead of spinning forever.
+        Interlocked.Exchange(ref _status, StatusFinished);
+        TraceSaveDataDialog($"open mode={_lastMode} userData=0x{_lastUserData:X16} -> finished");
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "ERKzksauAJA",
+        ExportName = "sceSaveDataDialogGetStatus",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogGetStatus(CpuContext ctx) => SetReturn(ctx, Volatile.Read(ref _status));
+
+    [SysAbiExport(
+        Nid = "KK3Bdg1RWK0",
+        ExportName = "sceSaveDataDialogUpdateStatus",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogUpdateStatus(CpuContext ctx) => SetReturn(ctx, Volatile.Read(ref _status));
+
+    [SysAbiExport(
+        Nid = "en7gNVnh878",
+        ExportName = "sceSaveDataDialogIsReadyToDisplay",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogIsReadyToDisplay(CpuContext ctx) => SetReturn(ctx, 1);
+
+    [SysAbiExport(
+        Nid = "yEiJ-qqr6Cg",
+        ExportName = "sceSaveDataDialogGetResult",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogGetResult(CpuContext ctx)
+    {
+        var resultAddress = ctx[CpuRegister.Rdi];
+        if (resultAddress == 0)
+        {
+            return SetReturn(ctx, ErrorArgNull);
+        }
+
+        if (Volatile.Read(ref _status) != StatusFinished)
+        {
+            return SetReturn(ctx, ErrorNotFinished);
+        }
+
+        Span<byte> result = stackalloc byte[ResultSize];
+        result.Clear();
+        BinaryPrimitives.WriteInt32LittleEndian(result[0x00..], _lastMode);
+        BinaryPrimitives.WriteInt32LittleEndian(result[0x04..], 0);
+        BinaryPrimitives.WriteInt32LittleEndian(result[0x08..], 0);
+        BinaryPrimitives.WriteUInt64LittleEndian(result[0x20..], _lastUserData);
+
+        if (!ctx.Memory.TryWrite(resultAddress, result))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "fH46Lag88XY",
+        ExportName = "sceSaveDataDialogClose",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogClose(CpuContext ctx)
+    {
+        if (Interlocked.CompareExchange(ref _status, StatusFinished, StatusRunning) != StatusRunning)
+        {
+            return SetReturn(ctx, ErrorNotRunning);
+        }
+
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "YuH2FA7azqQ",
+        ExportName = "sceSaveDataDialogTerminate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogTerminate(CpuContext ctx)
+    {
+        if (Interlocked.Exchange(ref _status, StatusNone) == StatusNone)
+        {
+            return SetReturn(ctx, ErrorNotInitialized);
+        }
+
+        _lastMode = 0;
+        _lastUserData = 0;
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "V-uEeFKARJU",
+        ExportName = "sceSaveDataDialogProgressBarInc",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogProgressBarInc(CpuContext ctx) => SetReturn(ctx, ErrorOk);
+
+    [SysAbiExport(
+        Nid = "hay1CfTmLyA",
+        ExportName = "sceSaveDataDialogProgressBarSetValue",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogProgressBarSetValue(CpuContext ctx) => SetReturn(ctx, ErrorOk);
+
+    private static bool TryReadInt32(CpuContext ctx, ulong address, out int value)
+    {
+        value = 0;
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadInt32LittleEndian(bytes);
+        return true;
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceSaveDataDialog(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_SAVEDATA"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] save_data_dialog.{message}");
+    }
+}

src/SharpEmu.Libs/SaveData/SaveDataExports.cs

@@ -0,0 +1,549 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using SharpEmu.Libs.Kernel;
+using System.Buffers.Binary;
+using System.Text;
+
+namespace SharpEmu.Libs.SaveData;
+
+public static class SaveDataExports
+{
+    private const int OrbisSaveDataErrorParameter = unchecked((int)0x809F0000);
+    private const int OrbisSaveDataErrorExists = unchecked((int)0x809F0007);
+    private const int OrbisSaveDataErrorNotFound = unchecked((int)0x809F0008);
+    private const int OrbisSaveDataErrorInternal = unchecked((int)0x809F000B);
+    private const int SaveDataTitleIdSize = 10;
+    private const int SaveDataDirNameSize = 32;
+    private const int SaveDataParamSize = 0x530;
+    private const int SaveDataSearchInfoSize = 0x30;
+    private const ulong ResultHitNumOffset = 0x00;
+    private const ulong ResultDirNamesOffset = 0x08;
+    private const ulong ResultDirNamesNumOffset = 0x10;
+    private const ulong ResultSetNumOffset = 0x14;
+    private const ulong ResultParamsOffset = 0x18;
+    private const ulong ResultInfosOffset = 0x20;
+    private const uint SortKeyFreeBlocks = 5;
+    private const uint SortOrderDescent = 1;
+    private const uint MountModeCreate = 1u << 2;
+    private const uint MountModeCreate2 = 1u << 5;
+    private const int MountResultSize = 0x40;
+    private static readonly object _stateGate = new();
+    private static string? _titleId;
+
+    public static void ConfigureApplicationInfo(string? titleId)
+    {
+        lock (_stateGate)
+        {
+            _titleId = string.IsNullOrWhiteSpace(titleId) ? null : SanitizePathSegment(titleId.Trim());
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "TywrFKCoLGY",
+        ExportName = "sceSaveDataInitialize3",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataInitialize3(CpuContext ctx)
+    {
+        try
+        {
+            Directory.CreateDirectory(ResolveSaveDataRoot());
+            return SetReturn(ctx, 0);
+        }
+        catch (IOException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "dyIhnXq-0SM",
+        ExportName = "sceSaveDataDirNameSearch",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataDirNameSearch(CpuContext ctx)
+    {
+        var condAddress = ctx[CpuRegister.Rdi];
+        var resultAddress = ctx[CpuRegister.Rsi];
+        if (condAddress == 0 || resultAddress == 0)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        if (!TryReadSearchCond(ctx, condAddress, out var cond) ||
+            !TryReadSearchResult(ctx, resultAddress, out var result))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        if (cond.UserId < 0 || cond.SortKey > SortKeyFreeBlocks || cond.SortOrder > SortOrderDescent)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        try
+        {
+            string titleId;
+            if (cond.TitleIdAddress == 0)
+            {
+                titleId = ResolveConfiguredTitleId();
+            }
+            else if (!TryReadFixedAscii(ctx, cond.TitleIdAddress, SaveDataTitleIdSize, out titleId))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            var root = ResolveTitleSaveRoot(cond.UserId, titleId);
+            var entries = Directory.Exists(root)
+                ? EnumerateSaveDirectories(root, cond.Pattern)
+                : [];
+
+            entries = SortEntries(entries, cond.SortKey, cond.SortOrder);
+            var setNum = result.DirNamesNum == 0
+                ? 0
+                : Math.Min(result.DirNamesNum, entries.Count);
+            if (!ctx.TryWriteUInt32(resultAddress + ResultHitNumOffset, checked((uint)entries.Count)) ||
+                !ctx.TryWriteUInt32(resultAddress + ResultSetNumOffset, checked((uint)setNum)))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            if (setNum == 0)
+            {
+                TraceSaveData($"dir_name_search user={cond.UserId} title={titleId} hits={entries.Count} set=0 root='{root}'");
+                return SetReturn(ctx, 0);
+            }
+
+            if (result.DirNamesAddress == 0)
+            {
+                return SetReturn(ctx, OrbisSaveDataErrorParameter);
+            }
+
+            for (var i = 0; i < setNum; i++)
+            {
+                var entry = entries[i];
+                if (!TryWriteFixedAscii(
+                        ctx,
+                        result.DirNamesAddress + ((ulong)i * SaveDataDirNameSize),
+                        SaveDataDirNameSize,
+                        entry.Name) ||
+                    (result.ParamsAddress != 0 &&
+                     !TryWriteParam(ctx, result.ParamsAddress + ((ulong)i * SaveDataParamSize), entry)) ||
+                    (result.InfosAddress != 0 &&
+                     !TryWriteSearchInfo(ctx, result.InfosAddress + ((ulong)i * SaveDataSearchInfoSize), entry)))
+                {
+                    return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+            }
+
+            TraceSaveData($"dir_name_search user={cond.UserId} title={titleId} hits={entries.Count} set={setNum} root='{root}'");
+            return SetReturn(ctx, 0);
+        }
+        catch (IOException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "ZP4e7rlzOUk",
+        ExportName = "sceSaveDataMount3",
+        Target = Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataMount3(CpuContext ctx)
+    {
+        var mountAddress = ctx[CpuRegister.Rdi];
+        var resultAddress = ctx[CpuRegister.Rsi];
+        if (mountAddress == 0 || resultAddress == 0)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        if (!TryReadInt32(ctx, mountAddress, out var userId) ||
+            !ctx.TryReadUInt64(mountAddress + 0x08, out var dirNameAddress) ||
+            !ctx.TryReadUInt64(mountAddress + 0x10, out var blocks) ||
+            !ctx.TryReadUInt64(mountAddress + 0x18, out var systemBlocks) ||
+            !ctx.TryReadUInt32(mountAddress + 0x20, out var mountMode) ||
+            !ctx.TryReadUInt32(mountAddress + 0x24, out var resource) ||
+            !ctx.TryReadUInt32(mountAddress + 0x28, out var mode) ||
+            dirNameAddress == 0 ||
+            !TryReadFixedAscii(ctx, dirNameAddress, SaveDataDirNameSize, out var dirName))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        if (userId < 0 || string.IsNullOrWhiteSpace(dirName))
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        try
+        {
+            var titleId = ResolveConfiguredTitleId();
+            var savePath = Path.Combine(
+                ResolveTitleSaveRoot(userId, titleId),
+                SanitizePathSegment(dirName));
+            var existed = Directory.Exists(savePath);
+            var create = (mountMode & MountModeCreate) != 0;
+            var createIfMissing = (mountMode & MountModeCreate2) != 0;
+
+            if (!existed && !create && !createIfMissing)
+            {
+                return SetReturn(ctx, OrbisSaveDataErrorNotFound);
+            }
+
+            if (existed && create)
+            {
+                return SetReturn(ctx, OrbisSaveDataErrorExists);
+            }
+
+            if (!existed)
+            {
+                Directory.CreateDirectory(savePath);
+            }
+
+            const string mountPoint = "/savedata0";
+            KernelMemoryCompatExports.RegisterGuestPathMount(mountPoint, savePath);
+
+            Span<byte> result = stackalloc byte[MountResultSize];
+            result.Clear();
+            WriteAscii(result[..16], mountPoint);
+            BinaryPrimitives.WriteUInt32LittleEndian(result[0x1C..], createIfMissing && !existed ? 1u : 0u);
+            if (!ctx.Memory.TryWrite(resultAddress, result))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            TraceSaveData(
+                $"mount3 user={userId} title={titleId} dir={dirName} blocks={blocks} " +
+                $"system_blocks={systemBlocks} mount_mode=0x{mountMode:X} resource={resource} mode={mode} " +
+                $"mount_point={mountPoint} created={!existed} root='{savePath}'");
+            return SetReturn(ctx, 0);
+        }
+        catch (IOException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (ArgumentException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+    }
+
+    private static int _nextTransactionResource;
+    [SysAbiExport(
+        Nid = "gjRZNnw0JPE",
+        ExportName = "sceSaveDataCreateTransactionResource",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataCreateTransactionResource(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var reserved = ctx[CpuRegister.Rsi];
+        var resourceAddress = ctx[CpuRegister.Rdx];
+
+        if (resourceAddress == 0)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        var id = (uint)Interlocked.Increment(ref _nextTransactionResource);
+
+        if (!ctx.TryWriteUInt32(resourceAddress, id))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceSaveData(
+            $"create_transaction_resource user={userId} reserved=0x{reserved:X} resource_addr=0x{resourceAddress:X} id={id}");
+
+        return SetReturn(ctx, 0);
+    }
+
+    private static bool TryReadSearchCond(CpuContext ctx, ulong address, out SearchCond cond)
+    {
+        cond = default;
+        if (!TryReadInt32(ctx, address, out var userId) ||
+            !ctx.TryReadUInt64(address + 0x08, out var titleIdAddress) ||
+            !ctx.TryReadUInt64(address + 0x10, out var dirNameAddress) ||
+            !ctx.TryReadUInt32(address + 0x18, out var sortKey) ||
+            !ctx.TryReadUInt32(address + 0x1C, out var sortOrder))
+        {
+            return false;
+        }
+
+        string pattern;
+        if (dirNameAddress == 0)
+        {
+            pattern = string.Empty;
+        }
+        else if (!TryReadFixedAscii(ctx, dirNameAddress, SaveDataDirNameSize, out pattern))
+        {
+            return false;
+        }
+
+        cond = new SearchCond(userId, titleIdAddress, pattern, sortKey, sortOrder);
+        return true;
+    }
+
+    private static bool TryReadSearchResult(CpuContext ctx, ulong address, out SearchResult result)
+    {
+        result = default;
+        if (!ctx.TryReadUInt64(address + ResultDirNamesOffset, out var dirNamesAddress) ||
+            !ctx.TryReadUInt32(address + ResultDirNamesNumOffset, out var dirNamesNum) ||
+            !ctx.TryReadUInt64(address + ResultParamsOffset, out var paramsAddress) ||
+            !ctx.TryReadUInt64(address + ResultInfosOffset, out var infosAddress))
+        {
+            return false;
+        }
+
+        result = new SearchResult(dirNamesAddress, dirNamesNum, paramsAddress, infosAddress);
+        return true;
+    }
+
+    private static List<SaveEntry> EnumerateSaveDirectories(string root, string pattern)
+    {
+        var entries = new List<SaveEntry>();
+        foreach (var directory in Directory.EnumerateDirectories(root))
+        {
+            var name = Path.GetFileName(directory);
+            if (string.IsNullOrWhiteSpace(name) ||
+                name.StartsWith("sce_", StringComparison.OrdinalIgnoreCase) ||
+                (!string.IsNullOrEmpty(pattern) && !MatchPattern(name, pattern)))
+            {
+                continue;
+            }
+
+            var info = new DirectoryInfo(directory);
+            entries.Add(new SaveEntry(name, directory, info.LastWriteTimeUtc));
+        }
+
+        return entries;
+    }
+
+    private static List<SaveEntry> SortEntries(List<SaveEntry> entries, uint sortKey, uint sortOrder)
+    {
+        IOrderedEnumerable<SaveEntry> sorted = sortKey switch
+        {
+            3 => entries.OrderBy(entry => entry.LastWriteUtc),
+            _ => entries.OrderBy(entry => entry.Name, StringComparer.OrdinalIgnoreCase),
+        };
+
+        var list = sorted.ToList();
+        if (sortOrder == SortOrderDescent)
+        {
+            list.Reverse();
+        }
+
+        return list;
+    }
+
+    private static bool TryWriteParam(CpuContext ctx, ulong address, SaveEntry entry)
+    {
+        var param = new byte[SaveDataParamSize];
+        WriteAscii(param.AsSpan(0x00, 128), "Saved Data");
+        WriteAscii(param.AsSpan(0x100, 1024), entry.Name);
+        BinaryPrimitives.WriteInt64LittleEndian(
+            param.AsSpan(0x508, sizeof(long)),
+            new DateTimeOffset(entry.LastWriteUtc).ToUnixTimeSeconds());
+        return ctx.Memory.TryWrite(address, param);
+    }
+
+    private static bool TryWriteSearchInfo(CpuContext ctx, ulong address, SaveEntry entry)
+    {
+        var size = GetDirectorySize(entry.Path);
+        var usedBlocks = checked((ulong)((size + 32767) / 32768));
+        var blocks = Math.Max(96UL, usedBlocks);
+        Span<byte> info = stackalloc byte[SaveDataSearchInfoSize];
+        info.Clear();
+        BinaryPrimitives.WriteUInt64LittleEndian(info[0x00..], blocks);
+        BinaryPrimitives.WriteUInt64LittleEndian(info[0x08..], blocks - usedBlocks);
+        return ctx.Memory.TryWrite(address, info);
+    }
+
+    private static long GetDirectorySize(string root)
+    {
+        long total = 0;
+        foreach (var file in Directory.EnumerateFiles(root, "*", SearchOption.AllDirectories))
+        {
+            total += new FileInfo(file).Length;
+        }
+
+        return total;
+    }
+
+    private static bool MatchPattern(string value, string pattern) =>
+        MatchPattern(value.AsSpan(), pattern.AsSpan());
+
+    private static bool MatchPattern(ReadOnlySpan<char> value, ReadOnlySpan<char> pattern)
+    {
+        if (pattern.IsEmpty)
+        {
+            return value.IsEmpty;
+        }
+
+        if (pattern[0] == '%')
+        {
+            for (var i = 0; i <= value.Length; i++)
+            {
+                if (MatchPattern(value[i..], pattern[1..]))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        if (value.IsEmpty)
+        {
+            return false;
+        }
+
+        if (pattern[0] == '_' ||
+            char.ToUpperInvariant(pattern[0]) == char.ToUpperInvariant(value[0]))
+        {
+            return MatchPattern(value[1..], pattern[1..]);
+        }
+
+        return false;
+    }
+
+    private static string ResolveTitleSaveRoot(int userId, string titleId) =>
+        Path.Combine(ResolveSaveDataRoot(), userId.ToString(), SanitizePathSegment(titleId));
+
+    private static string ResolveSaveDataRoot()
+    {
+        var configured = Environment.GetEnvironmentVariable("SHARPEMU_SAVEDATA_DIR");
+        var root = string.IsNullOrWhiteSpace(configured)
+            ? Path.Combine(AppContext.BaseDirectory, "user", "savedata")
+            : configured;
+        return Path.GetFullPath(root);
+    }
+
+    private static string ResolveConfiguredTitleId()
+    {
+        lock (_stateGate)
+        {
+            if (!string.IsNullOrWhiteSpace(_titleId))
+            {
+                return _titleId;
+            }
+        }
+
+        var app0Root = Environment.GetEnvironmentVariable("SHARPEMU_APP0_DIR");
+        var app0Name = string.IsNullOrWhiteSpace(app0Root)
+            ? null
+            : Path.GetFileName(Path.TrimEndingDirectorySeparator(app0Root));
+        if (!string.IsNullOrWhiteSpace(app0Name))
+        {
+            var candidate = app0Name.Split('-', StringSplitOptions.RemoveEmptyEntries)[0];
+            if (!string.IsNullOrWhiteSpace(candidate))
+            {
+                return SanitizePathSegment(candidate);
+            }
+        }
+
+        return "default";
+    }
+
+    private static string SanitizePathSegment(string value)
+    {
+        var invalid = Path.GetInvalidFileNameChars();
+        var sanitized = new string(value.Select(ch => invalid.Contains(ch) ? '_' : ch).ToArray());
+        return string.IsNullOrWhiteSpace(sanitized) ? "default" : sanitized;
+    }
+
+    private static bool TryReadFixedAscii(CpuContext ctx, ulong address, int length, out string value)
+    {
+        value = string.Empty;
+        Span<byte> buffer = stackalloc byte[length];
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            return false;
+        }
+
+        var stringLength = buffer.IndexOf((byte)0);
+        if (stringLength < 0)
+        {
+            stringLength = buffer.Length;
+        }
+
+        value = Encoding.ASCII.GetString(buffer[..stringLength]);
+        return true;
+    }
+
+    private static bool TryWriteFixedAscii(CpuContext ctx, ulong address, int length, string value)
+    {
+        Span<byte> buffer = stackalloc byte[length];
+        buffer.Clear();
+        WriteAscii(buffer, value);
+        return ctx.Memory.TryWrite(address, buffer);
+    }
+
+    private static void WriteAscii(Span<byte> destination, string value)
+    {
+        var count = Math.Min(value.Length, Math.Max(0, destination.Length - 1));
+        for (var i = 0; i < count; i++)
+        {
+            var ch = value[i];
+            destination[i] = ch <= 0x7F ? (byte)ch : (byte)'?';
+        }
+    }
+
+    private static bool TryReadInt32(CpuContext ctx, ulong address, out int value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadInt32LittleEndian(bytes);
+        return true;
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceSaveData(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_SAVEDATA"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] savedata.{message}");
+        }
+    }
+
+    private readonly record struct SearchCond(
+        int UserId,
+        ulong TitleIdAddress,
+        string Pattern,
+        uint SortKey,
+        uint SortOrder);
+
+    private readonly record struct SearchResult(
+        ulong DirNamesAddress,
+        uint DirNamesNum,
+        ulong ParamsAddress,
+        ulong InfosAddress);
+
+    private readonly record struct SaveEntry(string Name, string Path, DateTime LastWriteUtc);
+}

src/SharpEmu.Libs/Share/ShareExports.cs

@@ -0,0 +1,112 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Text;
+using System.Threading;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Share;
+
+public static class ShareExports
+{
+    private const int MaxContentParamBytes = 4096;
+
+    private static int _initialized;
+    private static string _contentParam = string.Empty;
+
+    [SysAbiExport(
+        Nid = "nBDD66kiFW8",
+        ExportName = "sceShareInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceShareUtility")]
+    public static int ShareInitialize(CpuContext ctx)
+    {
+        var memorySize = ctx[CpuRegister.Rdi];
+        var priority = unchecked((int)ctx[CpuRegister.Rsi]);
+        var affinityMask = ctx[CpuRegister.Rdx];
+        if (memorySize == 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Interlocked.Exchange(ref _initialized, 1);
+
+        TraceShare($"initialize memory=0x{memorySize:X} priority={priority} affinity=0x{affinityMask:X}");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "7QZtURYnXG4",
+        ExportName = "sceShareSetContentParam",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceShareUtility")]
+    public static int ShareSetContentParam(CpuContext ctx)
+    {
+        var contentParamAddress = ctx[CpuRegister.Rdi];
+        if (contentParamAddress == 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (!TryReadNullTerminatedUtf8(ctx, contentParamAddress, MaxContentParamBytes, out var contentParam))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        _contentParam = contentParam;
+        if (Volatile.Read(ref _initialized) == 0)
+        {
+            TraceShare("set_content_param before initialize");
+        }
+
+        TraceShare($"set_content_param len={contentParam.Length} preview='{FormatTraceString(contentParam)}'");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
+
+    private static bool TryReadNullTerminatedUtf8(CpuContext ctx, ulong address, int maxLength, out string value)
+    {
+        Span<byte> bytes = stackalloc byte[maxLength];
+        Span<byte> one = stackalloc byte[1];
+        for (var index = 0; index < maxLength; index++)
+        {
+            if (!ctx.Memory.TryRead(address + (ulong)index, one))
+            {
+                value = string.Empty;
+                return false;
+            }
+
+            if (one[0] == 0)
+            {
+                value = Encoding.UTF8.GetString(bytes[..index]);
+                return true;
+            }
+
+            bytes[index] = one[0];
+        }
+
+        value = string.Empty;
+        return false;
+    }
+
+    private static string FormatTraceString(string value)
+    {
+        var normalized = value.Replace("\r", "\\r", StringComparison.Ordinal).Replace("\n", "\\n", StringComparison.Ordinal);
+        return normalized.Length <= 120 ? normalized : string.Concat(normalized.AsSpan(0, 120), "...");
+    }
+
+    private static void TraceShare(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_SHARE"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] share.{message}");
+    }
+}

src/SharpEmu.Libs/SharpEmu.Libs.csproj

@@ -8,6 +8,17 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <ProjectReference Include="..\SharpEmu.HLE\SharpEmu.HLE.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Silk.NET.Vulkan" />
+    <PackageReference Include="Silk.NET.Vulkan.Extensions.EXT" />
+    <PackageReference Include="Silk.NET.Vulkan.Extensions.KHR" />
+    <PackageReference Include="Silk.NET.Windowing" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <NoWarn>$(NoWarn);1591</NoWarn>
+  </PropertyGroup>
+
   <PropertyGroup>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>