[GUI] update icon to .ico format

* GUI: redesign library as a cover-art grid with game management

Replace the sidebar game list with a full-width grid of cover tiles.
Cover art is loaded automatically from each game's sce_sys/icon0.png
(pic0.png fallback) and decoded off the UI thread; games without art
get a deterministic gradient placeholder with the title's initials.

- New layout: search/scan toolbar, tile grid with hover and selection
  states, bottom launch bar with cover thumbnail, collapsible launch
  options and console panels (console auto-opens on launch)
- Right-click context menu on tiles: launch, open game folder, copy
  path/title ID, remove from library
- Removed games persist in an ExcludedGames settings list; re-adding
  a folder restores any removed games beneath it
- Search now also matches title IDs
- Fix: placeholder brushes were constructed on the scan thread, which
  throws in Avalonia and was silently swallowed, yielding empty scans

* GUI: show full install folder size instead of eboot.bin size

The library previously displayed the size of eboot.bin alone, which
wildly understates a game's real footprint. The install folder is now
totaled recursively in the existing background pass (after cover art,
which is cheaper and more visible), and each tile updates live once
its size is ready.

* GUI: selection backdrop, smaller tiles, controller navigation

Address review feedback on the library redesign:

- Selecting a game fades its key art (sce_sys/pic0.png, pic1.png
  fallback) in as the window backdrop, dimmed by a gradient scrim;
  decoded off the UI thread and cached per entry
- Cover tiles reduced from 156px to 128px
- The library can be driven with a DualSense: d-pad/left stick moves
  the selection (hold-to-repeat, row-aware), Cross launches, Circle
  stops; input is ignored while the launcher window is unfocused.
  Reuses the pad HID reader by compile-linking its dependency-free
  sources instead of referencing all of SharpEmu.Libs

.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

@@ -0,0 +1,144 @@
+# 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"]
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Use this template to report the compatibility status of a game.
+
+        Please include the **game name in the issue title**.
+
+        Example title:
+        Demon’s Souls (PPSA01341)
+
+  - type: input
+    id: game_name
+    attributes:
+      label: Game Name
+      placeholder: e.g. Demon's Souls
+    validations:
+      required: true
+
+  - type: input
+    id: title_id
+    attributes:
+      label: Title ID
+      description: Game title ID (PPSA / CUSA / PCSA etc.)
+      placeholder: e.g. PPSA01341
+    validations:
+      required: true
+
+  - type: input
+    id: game_version
+    attributes:
+      label: Game Version
+      placeholder: e.g. 1.00 / 1.09
+    validations:
+      required: true
+
+  - type: dropdown
+    id: status
+    attributes:
+      label: Current Status
+      description: What happens when running the game?
+      options:
+        - Nothing happens
+        - Crashes on boot
+        - Boots to black screen
+        - Shows intro / menus
+        - Ingame but unstable
+        - Playable
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Describe what happens when running the game
+      placeholder: |
+        Example:
+        - Game boots
+        - Shows intro logos
+        - Crashes when entering gameplay
+    validations:
+      required: true
+
+  - type: upload
+    id: logs
+    attributes:
+      label: Log File
+      description: Drag and drop your log file here, or click to browse
+    validations:
+      required: false
+      accept: ".log,.txt,.zip"
+
+  - type: dropdown
+    id: operating_system
+    attributes:
+      label: Operating System
+      options:
+        - Windows 11
+        - Windows 10
+        - Linux
+        - macOS
+        - Other
+    validations:
+      required: true
+
+  - type: input
+    id: cpu
+    attributes:
+      label: CPU
+      placeholder: e.g. AMD Ryzen 7 5800X3D
+    validations:
+      required: true
+
+  - type: input
+    id: gpu
+    attributes:
+      label: GPU
+      placeholder: e.g. NVIDIA GeForce RTX 4070 Super
+    validations:
+      required: true
+
+  - type: input
+    id: ram
+    attributes:
+      label: RAM
+      placeholder: e.g. 32 GB
+    validations:
+      required: true
+
+  - type: input
+    id: emulator_version
+    attributes:
+      label: Emulator Version / Commit
+      placeholder: e.g. v0.0.1 / a1b2c3d
+    validations:
+      required: true
+
+  - type: dropdown
+    id: renderer
+    attributes:
+      label: Renderer
+      options:
+        - Vulkan
+        - OpenGL
+        - DirectX
+        - Software
+        - N/A
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional Notes
+      description: Screenshots, settings, patches, workarounds, or anything else relevant

.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 +25,44 @@ 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)
     {
+        try
+        {
+            return Run(args);
+        }
+        finally
+        {
+            SharpEmuLog.Shutdown();
+        }
+    }
+
+    private static int Run(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;
@@ -45,7 +78,7 @@ internal static partial class Program
 
         ebootPath = Path.GetFullPath(ebootPath);
         Console.Error.WriteLine($"[DEBUG] Full path: {ebootPath}");
-        
+
         if (!File.Exists(ebootPath))
         {
             Log.Error($"EBOOT file was not found: {ebootPath}");
@@ -101,6 +134,58 @@ 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 +755,32 @@ 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": {
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+      },
+      "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

@@ -7,15 +7,25 @@ using SharpEmu.Core.Cpu.Native;
 using SharpEmu.Core.Loader;
 using SharpEmu.Core.Memory;
 using SharpEmu.HLE;
+using SharpEmu.Logging;
 
 namespace SharpEmu.Core.Cpu;
 
 public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
 {
+    private static readonly SharpEmuLogger Log = SharpEmuLog.For("Dispatcher");
+
+    private enum EntryFrameKind
+    {
+        ProcessEntry,
+        ModuleInitializer,
+    }
+
     private const ulong StackBaseAddress = 0x7FFF_F000_0000UL;
     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;
@@ -73,8 +83,8 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
         string processImageName = "eboot.bin",
         CpuExecutionOptions executionOptions = default)
     {
-        Console.Error.WriteLine("[DISPATCHER] === DispatchEntry START ===");
-        Console.Error.WriteLine($"[DISPATCHER] entryPoint=0x{entryPoint:X16}, generation={generation}");
+        Log.Debug("=== DispatchEntry START ===");
+        Log.Debug($"entryPoint=0x{entryPoint:X16}, generation={generation}");
 
         try
         {
@@ -82,8 +92,36 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
         }
         catch (Exception ex)
         {
-            Console.Error.WriteLine($"[DISPATCHER] FATAL EXCEPTION in DispatchEntry: {ex.GetType().Name}: {ex.Message}");
-            Console.Error.WriteLine($"[DISPATCHER] Stack trace: {ex.StackTrace}");
+            Log.Critical($"FATAL EXCEPTION in DispatchEntry: {ex.GetType().Name}: {ex.Message}", ex);
+            throw;
+        }
+    }
+
+    public OrbisGen2Result DispatchModuleInitializer(
+        ulong entryPoint,
+        Generation generation,
+        IReadOnlyDictionary<ulong, string>? importStubs = null,
+        IReadOnlyDictionary<string, ulong>? runtimeSymbols = null,
+        string moduleName = "module",
+        CpuExecutionOptions executionOptions = default)
+    {
+        Log.Debug("=== DispatchModuleInitializer START ===");
+        Log.Debug($"moduleInit=0x{entryPoint:X16}, generation={generation}, module={moduleName}");
+
+        try
+        {
+            return DispatchEntryCore(
+                entryPoint,
+                generation,
+                importStubs,
+                runtimeSymbols,
+                moduleName,
+                executionOptions,
+                EntryFrameKind.ModuleInitializer);
+        }
+        catch (Exception ex)
+        {
+            Log.Critical($"FATAL EXCEPTION in DispatchModuleInitializer: {ex.GetType().Name}: {ex.Message}", ex);
             throw;
         }
     }
@@ -94,9 +132,10 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
         IReadOnlyDictionary<ulong, string>? importStubs = null,
         IReadOnlyDictionary<string, ulong>? runtimeSymbols = null,
         string processImageName = "eboot.bin",
-        CpuExecutionOptions executionOptions = default)
+        CpuExecutionOptions executionOptions = default,
+        EntryFrameKind frameKind = EntryFrameKind.ProcessEntry)
     {
-        Console.Error.WriteLine("[DISPATCHER] DispatchEntryCore STARTING...");
+        Log.Debug("DispatchEntryCore STARTING...");
 
         LastEntryPoint = entryPoint;
         LastTrapInfo = null;
@@ -156,6 +195,11 @@ 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);
@@ -164,23 +208,33 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
         var effectiveImportStubs = importStubs is null
             ? new Dictionary<ulong, string>()
             : new Dictionary<ulong, string>(importStubs);
-        var programExitHandlerStubAddress = TryMapDynlibFallbackStubRegion();
-        if (programExitHandlerStubAddress == 0)
+        var entryParamsConfigured = false;
+        if (frameKind == EntryFrameKind.ProcessEntry)
         {
-            return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
-        }
-
-        if (!InitializeProcessEntryFrame(context, processImageName, programExitHandlerStubAddress))
-        {
-            return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
-        }
-
-        if (ShouldInjectBootstrapPayload(entryPoint))
-        {
-            if (!TryInstallBootstrapPayload(context, effectiveImportStubs))
+            var programExitHandlerStubAddress = TryMapDynlibFallbackStubRegion();
+            if (programExitHandlerStubAddress == 0)
             {
                 return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
             }
+
+            if (!InitializeProcessEntryFrame(context, processImageName, programExitHandlerStubAddress))
+            {
+                return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            entryParamsConfigured = true;
+
+            if (ShouldInjectBootstrapPayload(entryPoint))
+            {
+                if (!TryInstallBootstrapPayload(context, effectiveImportStubs))
+                {
+                    return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+            }
+        }
+        else if (!InitializeModuleInitializerFrame(context))
+        {
+            return FailEarly(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
         }
 
         var entryFrameDiagnostic = BuildEntryFrameDiagnostic(
@@ -188,7 +242,7 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
             context,
             sentinelEnabled: true,
             sentinelValue: returnToHostStubAddress,
-            entryParamsConfigured: true);
+            entryParamsConfigured: entryParamsConfigured);
 
         if (executionOptions.CpuEngine != CpuExecutionEngine.NativeOnly)
         {
@@ -253,7 +307,7 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
             LastMilestoneLog,
             Environment.NewLine,
             $"CpuEngine native-only failed: {backendError}");
-        Console.Error.WriteLine($"[DISPATCHER] Native backend FAILED: {backendError}");
+        Log.Error($"Native backend FAILED: {backendError}");
         return FailEarly(
             OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_IMPLEMENTED,
             CpuExitReason.NativeBackendUnavailable);
@@ -290,11 +344,12 @@ 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);
@@ -311,9 +366,28 @@ 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(
@@ -342,8 +416,8 @@ 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))
@@ -351,6 +425,13 @@ 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;
@@ -360,18 +441,22 @@ public sealed class CpuDispatcher : ICpuDispatcher, IDisposable
         return true;
     }
 
+    private static bool InitializeModuleInitializerFrame(CpuContext context)
+    {
+        context[CpuRegister.Rdi] = 0;
+        context[CpuRegister.Rsi] = 0;
+        context[CpuRegister.Rdx] = 0;
+        context[CpuRegister.Rcx] = 0;
+        context[CpuRegister.R8] = 0;
+        context[CpuRegister.R9] = 0;
+        return true;
+    }
+
     private static ulong AlignDown(ulong value, ulong alignment)
     {
         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/ICpuDispatcher.cs

@@ -34,4 +34,12 @@ public interface ICpuDispatcher
         IReadOnlyDictionary<string, ulong>? runtimeSymbols = null,
         string processImageName = "eboot.bin",
         CpuExecutionOptions executionOptions = default);
+
+    OrbisGen2Result DispatchModuleInitializer(
+        ulong entryPoint,
+        Generation generation,
+        IReadOnlyDictionary<ulong, string>? importStubs = null,
+        IReadOnlyDictionary<string, ulong>? runtimeSymbols = null,
+        string moduleName = "module",
+        CpuExecutionOptions executionOptions = default);
 }

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

@@ -4,8 +4,10 @@
 using System;
 using System.Buffers.Binary;
 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;
 
@@ -13,11 +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
@@ -27,12 +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)
@@ -60,7 +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;
 		}
@@ -83,10 +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)
 			{
@@ -254,6 +282,9 @@ public sealed partial class DirectExecutionBackend
 						Console.Error.WriteLine("[LOADER][ERROR]   Could not read code at RIP");
 					}
 					DumpRecentImportTrace();
+					DumpGuestDisasmDiagnostics(rip, rbp);
+					DumpGuestReferenceDiagnostics();
+					DumpGuestPointerWindowDiagnostics();
 					break;
 				case 2147483651u:
 					Console.Error.WriteLine("[LOADER][WARNING]   Type: Breakpoint (int3)");
@@ -274,6 +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;
@@ -322,6 +384,239 @@ public sealed partial class DirectExecutionBackend
 		}
 	}
 
+	private void DumpGuestDisasmDiagnostics(ulong rip, ulong rbp)
+	{
+		if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_DISASM"), "1", StringComparison.Ordinal))
+		{
+			return;
+		}
+
+		if (rip >= 0x20)
+		{
+			DumpGuestInstructionStream("fault-prelude", rip - 0x20, 24);
+		}
+
+		try
+		{
+			ulong frame = rbp;
+			for (int i = 0; i < 3; i++)
+			{
+				if (frame < 140733193388032L || frame > 140737488355327L)
+				{
+					break;
+				}
+
+				ulong ret = (ulong)Marshal.ReadInt64((nint)(frame + 8));
+				if (ret >= 0x40)
+				{
+					DumpGuestInstructionStream($"frame#{i}-ret-prelude", ret - 0x40, 24);
+				}
+
+				ulong next = (ulong)Marshal.ReadInt64((nint)frame);
+				if (next <= frame)
+				{
+					break;
+				}
+
+				frame = next;
+			}
+		}
+		catch
+		{
+			Console.Error.WriteLine("[LOADER][WARNING]   Could not dump disasm diagnostics.");
+		}
+
+		var extraAddresses = Environment.GetEnvironmentVariable("SHARPEMU_LOG_DISASM_ADDRS");
+		if (string.IsNullOrWhiteSpace(extraAddresses))
+		{
+			return;
+		}
+
+		foreach (var token in extraAddresses.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+		{
+			var normalized = token.StartsWith("0x", StringComparison.OrdinalIgnoreCase)
+				? token[2..]
+				: token;
+			if (!ulong.TryParse(normalized, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var address) || address < 0x20)
+			{
+				continue;
+			}
+
+			DumpGuestInstructionStream($"extra-0x{address:X16}", address, 48);
+		}
+	}
+
+	private unsafe void DumpGuestReferenceDiagnostics()
+	{
+		var targetList = ParseDiagnosticAddresses(Environment.GetEnvironmentVariable("SHARPEMU_LOG_REFSCAN_ADDRS"));
+		if (targetList.Count == 0 || _cpuContext == null)
+		{
+			return;
+		}
+
+		const ulong scanBase = 0x0000000800000000UL;
+		const ulong scanEnd = 0x0000000810000000UL;
+		const int maxHitsPerTarget = 24;
+
+		Console.Error.WriteLine(
+			$"[LOADER][INFO]   Ref scan targets: {string.Join(", ", targetList.ConvertAll(static addr => $"0x{addr:X16}"))}");
+
+		var hitCounts = new Dictionary<ulong, int>(targetList.Count);
+		for (var i = 0; i < targetList.Count; i++)
+		{
+			hitCounts[targetList[i]] = 0;
+		}
+
+		ulong address = scanBase;
+		while (address < scanEnd)
+		{
+			if (VirtualQuery((void*)address, out var mbi, (nuint)sizeof(MEMORY_BASIC_INFORMATION64)) == 0)
+			{
+				break;
+			}
+
+			ulong regionBase = mbi.BaseAddress;
+			ulong regionEnd = regionBase + mbi.RegionSize;
+			if (regionEnd <= address)
+			{
+				break;
+			}
+
+			if (mbi.State == MEM_COMMIT &&
+				IsReadableProtection(mbi.Protect) &&
+				IsExecutableProtection(mbi.Protect))
+			{
+				ScanExecutableRegionForTargetReferences(regionBase, regionEnd, targetList, hitCounts, maxHitsPerTarget);
+			}
+
+			var allTargetsSatisfied = true;
+			for (var i = 0; i < targetList.Count; i++)
+			{
+				if (hitCounts[targetList[i]] < maxHitsPerTarget)
+				{
+					allTargetsSatisfied = false;
+					break;
+				}
+			}
+
+			if (allTargetsSatisfied)
+			{
+				break;
+			}
+
+			address = regionEnd;
+		}
+
+		for (var i = 0; i < targetList.Count; i++)
+		{
+			var target = targetList[i];
+			if (!hitCounts.TryGetValue(target, out var count) || count == 0)
+			{
+				Console.Error.WriteLine($"[LOADER][INFO]   Ref scan 0x{target:X16}: none");
+			}
+		}
+	}
+
+	private void DumpGuestPointerWindowDiagnostics()
+	{
+		var targetList = ParseDiagnosticAddresses(Environment.GetEnvironmentVariable("SHARPEMU_LOG_POINTER_WINDOWS"));
+		if (targetList.Count == 0)
+		{
+			return;
+		}
+
+		var windowSize = 0x80;
+		var rawWindowSize = Environment.GetEnvironmentVariable("SHARPEMU_LOG_POINTER_WINDOW_SIZE");
+		if (!string.IsNullOrWhiteSpace(rawWindowSize))
+		{
+			var normalized = rawWindowSize.StartsWith("0x", StringComparison.OrdinalIgnoreCase)
+				? rawWindowSize[2..]
+				: rawWindowSize;
+			if (int.TryParse(normalized, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var parsedWindowSize) &&
+				parsedWindowSize > 0)
+			{
+				windowSize = parsedWindowSize;
+			}
+		}
+
+		foreach (var target in targetList)
+		{
+			DumpPointerWindow($"ptrwin-0x{target:X16}", target, windowSize);
+		}
+	}
+
+	private void ScanExecutableRegionForTargetReferences(
+		ulong regionBase,
+		ulong regionEnd,
+		IReadOnlyList<ulong> targets,
+		IDictionary<ulong, int> hitCounts,
+		int maxHitsPerTarget)
+	{
+		if (_cpuContext == null || regionEnd <= regionBase)
+		{
+			return;
+		}
+
+		ulong rip = regionBase;
+		while (rip < regionEnd)
+		{
+			if (!IcedDecoder.TryReadGuestBytes(_cpuContext.Memory, rip, maxLen: 15, out var bytes) ||
+				!IcedDecoder.TryDecode(rip, bytes, out var instruction) ||
+				instruction.Length <= 0)
+			{
+				rip++;
+				continue;
+			}
+
+			if (instruction.MemoryAddress is { } memoryAddress)
+			{
+				for (var i = 0; i < targets.Count; i++)
+				{
+					var target = targets[i];
+					if (memoryAddress != target ||
+						!hitCounts.TryGetValue(target, out var count) ||
+						count >= maxHitsPerTarget)
+					{
+						continue;
+					}
+
+					hitCounts[target] = count + 1;
+					Console.Error.WriteLine(
+						$"[LOADER][INFO]   Ref scan hit target=0x{target:X16} rip=0x{instruction.Rip:X16} text={instruction.Text} bytes={IcedDecoder.FormatBytes(instruction.Bytes)}");
+				}
+			}
+
+			rip += (ulong)instruction.Length;
+		}
+	}
+
+	private static List<ulong> ParseDiagnosticAddresses(string? rawValue)
+	{
+		var result = new List<ulong>();
+		if (string.IsNullOrWhiteSpace(rawValue))
+		{
+			return result;
+		}
+
+		foreach (var token in rawValue.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+		{
+			var normalized = token.StartsWith("0x", StringComparison.OrdinalIgnoreCase)
+				? token[2..]
+				: token;
+			if (!ulong.TryParse(normalized, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var address))
+			{
+				continue;
+			}
+
+			if (!result.Contains(address))
+			{
+				result.Add(address);
+			}
+		}
+
+		return result;
+	}
+
 	private void DumpUnresolvedSentinelWindow(string name, ulong baseAddress, int size)
 	{
 		if (baseAddress < 0x10000 || size <= 0)
@@ -591,7 +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)
 		{
@@ -608,6 +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;
@@ -615,7 +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;
@@ -623,14 +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))
@@ -653,7 +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;
 		}
 
@@ -662,14 +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))
@@ -698,9 +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)
@@ -727,6 +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/ImportedSymbolRelocation.cs

@@ -0,0 +1,10 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+namespace SharpEmu.Core.Loader;
+
+public readonly record struct ImportedSymbolRelocation(
+    ulong TargetAddress,
+    long Addend,
+    string Nid,
+    bool IsData);

src/SharpEmu.Core/Loader/SelfImage.cs

@@ -16,8 +16,15 @@ public sealed class SelfImage
         IReadOnlyList<VirtualMemoryRegion> mappedRegions,
         IReadOnlyDictionary<ulong, string>? importStubs = null,
         IReadOnlyDictionary<string, ulong>? runtimeSymbols = null,
+        IReadOnlyList<ImportedSymbolRelocation>? importedRelocations = null,
+        IReadOnlyList<ulong>? preInitializerFunctions = null,
+        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);
@@ -28,8 +35,15 @@ public sealed class SelfImage
         MappedRegions = mappedRegions;
         ImportStubs = importStubs ?? new Dictionary<ulong, string>();
         RuntimeSymbols = runtimeSymbols ?? new Dictionary<string, ulong>(StringComparer.Ordinal);
+        ImportedRelocations = importedRelocations ?? Array.Empty<ImportedSymbolRelocation>();
+        PreInitializerFunctions = preInitializerFunctions ?? Array.Empty<ulong>();
+        InitializerFunctions = initializerFunctions ?? Array.Empty<ulong>();
+        InitFunctionEntryPoint = initFunctionEntryPoint;
         _imageBase = imageBase;
         ProcParamAddress = procParamAddress;
+        Title = title;
+        TitleId = titleId;
+        Version = version;
     }
 
     public bool IsSelf { get; }
@@ -44,7 +58,21 @@ public sealed class SelfImage
 
     public IReadOnlyDictionary<string, ulong> RuntimeSymbols { get; }
 
+    public IReadOnlyList<ImportedSymbolRelocation> ImportedRelocations { get; }
+
+    public IReadOnlyList<ulong> PreInitializerFunctions { get; }
+
+    public IReadOnlyList<ulong> InitializerFunctions { get; }
+
+    public ulong InitFunctionEntryPoint { get; }
+
     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

@@ -29,6 +29,7 @@ public sealed class SelfLoader : ISelfLoader
     private const int ElfRelocationSize = 24;
     private const int ElfSectionHeaderSize = 64;
     private const uint SectionTypeSymbolTable = 2;
+    private const uint SectionTypeRela = 4;
 
     private const long DtNull = 0;
     private const long DtPltRelSize = 0x02;
@@ -37,8 +38,13 @@ public sealed class SelfLoader : ISelfLoader
     private const long DtSymTab = 0x06;
     private const long DtRela = 0x07;
     private const long DtRelaSize = 0x08;
+    private const long DtInit = 0x0C;
     private const long DtStrSize = 0x0A;
     private const long DtJmpRel = 0x17;
+    private const long DtInitArray = 0x19;
+    private const long DtInitArraySize = 0x1B;
+    private const long DtPreInitArray = 0x20;
+    private const long DtPreInitArraySize = 0x21;
     private const long DtSceJmpRel = 0x61000029;
     private const long DtScePltRelSize = 0x6100002D;
     private const long DtSceRela = 0x6100002F;
@@ -60,11 +66,12 @@ public sealed class SelfLoader : ISelfLoader
     private const ulong Ps4ModuleSearchStart = 0x0000000002000000UL;
     private const ulong Ps4ModuleSearchEnd = 0x0000000040000000UL;
     private const ulong ModulePlacementStep = 0x00200000UL;
-    private const ulong FocusRelocGuestStart = 0x00000008030FC300UL;
-    private const ulong FocusRelocGuestEnd = 0x00000008030FC3F0UL;
+    private const ulong FocusRelocGuestStart = 0x0000000807BA25B0UL;
+    private const ulong FocusRelocGuestEnd = 0x0000000807BA2608UL;
     private const byte SymbolBindLocal = 0;
     private const byte SymbolBindGlobal = 1;
     private const byte SymbolBindWeak = 2;
+    private const byte SymbolTypeObject = 1;
 
     private IModuleManager? _moduleManager;
     private uint _nextTlsModuleId = 1;
@@ -72,6 +79,7 @@ public sealed class SelfLoader : ISelfLoader
     private static readonly IReadOnlyDictionary<ulong, string> EmptyImportStubs = new Dictionary<ulong, string>();
     private static readonly IReadOnlyDictionary<string, ulong> EmptyRuntimeSymbols =
         new Dictionary<string, ulong>(StringComparer.Ordinal);
+    private static readonly IReadOnlyList<ulong> EmptyInitializerFunctions = Array.Empty<ulong>();
     private static readonly int SelfHeaderSize = Unsafe.SizeOf<SelfHeader>();
     private static readonly int SelfSegmentSize = Unsafe.SizeOf<SelfSegment>();
     private static readonly int ProgramHeaderSize = Unsafe.SizeOf<ProgramHeader>();
@@ -136,10 +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)
         {
@@ -190,11 +197,13 @@ public sealed class SelfLoader : ISelfLoader
         var importStubs = ResolveAndPatchImportStubs(
             imageData,
             loadContext,
+            elfHeader,
             programHeaders,
             virtualMemory,
             imageBase,
             _moduleManager,
-            tlsModuleId);
+            tlsModuleId,
+            out var importedRelocations);
         var effectiveImportStubs = importStubs.Count == 0
             ? new Dictionary<ulong, string>()
             : new Dictionary<ulong, string>(importStubs);
@@ -214,6 +223,15 @@ public sealed class SelfLoader : ISelfLoader
         var finalizedRuntimeSymbols = runtimeSymbols.Count == 0
             ? EmptyRuntimeSymbols
             : runtimeSymbols;
+        CollectInitializerFunctions(
+            imageData,
+            loadContext,
+            programHeaders,
+            virtualMemory,
+            imageBase,
+            out var initFunctionEntryPoint,
+            out var preInitializerFunctions,
+            out var initializerFunctions);
         var procParamAddress = ResolveProcParamAddress(programHeaders, imageBase);
 
         Console.WriteLine($"[LOADER] ELF e_entry: 0x{elfHeader.EntryPoint:X16}");
@@ -246,16 +264,25 @@ public sealed class SelfLoader : ISelfLoader
             virtualMemory.SnapshotRegions(),
             finalizedImportStubs,
             finalizedRuntimeSymbols,
+            importedRelocations,
+            preInitializerFunctions,
+            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)
@@ -275,12 +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)
@@ -426,12 +457,15 @@ public sealed class SelfLoader : ISelfLoader
     private static IReadOnlyDictionary<ulong, string> ResolveAndPatchImportStubs(
         ReadOnlySpan<byte> imageData,
         LoadContext loadContext,
+        ElfHeader elfHeader,
         IReadOnlyList<ProgramHeader> programHeaders,
         IVirtualMemory virtualMemory,
         ulong imageBase,
         IModuleManager? moduleManager,
-        uint tlsModuleId)
+        uint tlsModuleId,
+        out IReadOnlyList<ImportedSymbolRelocation> importedRelocations)
     {
+        importedRelocations = Array.Empty<ImportedSymbolRelocation>();
         if (!TryGetProgramHeader(programHeaders, ProgramHeaderType.Dynamic, out var dynamicHeader, out var dynamicHeaderIndex))
         {
             return EmptyImportStubs;
@@ -447,10 +481,18 @@ public sealed class SelfLoader : ISelfLoader
             throw new NotSupportedException("Dynamic metadata segments larger than 2 GB are not currently supported.");
         }
 
-        var dynamicOffset = ResolvePhysicalSegmentOffset(imageData.Length, loadContext, dynamicHeader, dynamicHeaderIndex);
-        EnsureRange(imageData.Length, dynamicOffset, dynamicHeader.FileSize);
+        if (!TryLoadDynamicTableBytes(
+                imageData,
+                loadContext,
+                virtualMemory,
+                imageBase,
+                dynamicHeader,
+                dynamicHeaderIndex,
+                out var dynamicTable))
+        {
+            return EmptyImportStubs;
+        }
 
-        var dynamicTable = imageData.Slice((int)dynamicOffset, (int)dynamicHeader.FileSize);
         var elfData = imageData;
 
         var dynamicInfo = ParseDynamicInfo(dynamicTable);
@@ -463,13 +505,6 @@ public sealed class SelfLoader : ISelfLoader
         Console.WriteLine($"[LOADER] TLS module id: {tlsModuleId}");
         Console.WriteLine($"[LOADER] HasImportMetadata: {dynamicInfo.HasImportMetadata}");
 
-        if (!dynamicInfo.HasImportMetadata)
-        {
-            Console.WriteLine($"[LOADER] No import metadata found in ELF!");
-            return EmptyImportStubs;
-        }
-
-        Console.WriteLine($"[LOADER] ImageBase runtime: 0x{imageBase:X16}");
         var relocations = new List<ElfRelocation>(512);
 
         if (dynamicInfo.RelaSize != 0 &&
@@ -484,13 +519,16 @@ public sealed class SelfLoader : ISelfLoader
             CollectRelocations(jmpRelBytes, relocations);
         }
 
-        if (relocations.Count == 0)
+        if (!dynamicInfo.HasImportMetadata)
         {
-            Console.WriteLine($"[LOADER] No relocations found!");
-            return EmptyImportStubs;
+            Console.WriteLine($"[LOADER] No import metadata found in ELF!");
         }
 
-        Console.WriteLine($"[LOADER] Processing {relocations.Count} relocations...");
+        if (relocations.Count != 0)
+        {
+            Console.WriteLine($"[LOADER] ImageBase runtime: 0x{imageBase:X16}");
+            Console.WriteLine($"[LOADER] Processing {relocations.Count} relocations...");
+        }
 
         uint maxSymbolIndex = 0;
         foreach (var relocation in relocations)
@@ -544,164 +582,37 @@ public sealed class SelfLoader : ISelfLoader
         var descriptors = new List<RelocationDescriptor>(256);
         var orderedImportNids = new List<string>(128);
         var seenImportNids = new HashSet<string>(StringComparer.Ordinal);
-        var skippedUnsupported = 0;
-        var skippedUnmapped = 0;
-        var skippedSymbolRead = 0;
-        var skippedNonImportBind = 0;
-        var skippedNameRead = 0;
-        var skippedEmptyNid = 0;
-        foreach (var relocation in relocations)
+        AppendRelocationDescriptors(
+            relocations,
+            symbolTable,
+            stringTable,
+            virtualMemory,
+            imageBase,
+            tlsModuleId,
+            descriptors,
+            orderedImportNids,
+            seenImportNids);
+
+        if (descriptors.Count == 0)
         {
-            if (IsFocusRelocationOffset(relocation.Offset, imageBase))
+            var sectionFallbackRelocCount = AppendSectionRelocationDescriptors(
+                imageData,
+                loadContext,
+                elfHeader,
+                virtualMemory,
+                imageBase,
+                tlsModuleId,
+                descriptors,
+                orderedImportNids,
+                seenImportNids);
+            if (sectionFallbackRelocCount != 0)
             {
-                Console.Error.WriteLine(
-                    $"[LOADER][FOCUS][SCAN] off=0x{relocation.Offset:X16} type={relocation.Type} sym={relocation.SymbolIndex} addend=0x{relocation.Addend:X}");
+                Console.WriteLine(
+                    $"[LOADER] Section relocation fallback recovered {sectionFallbackRelocCount} relocation entries, {orderedImportNids.Count} unique NIDs, {descriptors.Count} descriptors");
             }
-
-            if (!IsSupportedRelocationType(relocation.Type))
-            {
-                skippedUnsupported++;
-                if (IsFocusRelocationOffset(relocation.Offset, imageBase))
-                {
-                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] unsupported type={relocation.Type}");
-                }
-                continue;
-            }
-
-            if (!TryResolveMappedAddress(virtualMemory, relocation.Offset, imageBase, sizeof(ulong), out var targetAddress))
-            {
-                skippedUnmapped++;
-                if (IsFocusRelocationOffset(relocation.Offset, imageBase))
-                {
-                    Console.Error.WriteLine("[LOADER][FOCUS][SKIP] target address not mapped");
-                }
-                continue;
-            }
-
-            if (relocation.Type == RelocationTypeRelative)
-            {
-                descriptors.Add(new RelocationDescriptor(
-                    targetAddress,
-                    relocation.Addend,
-                    null,
-                    imageBase,
-                    RelocationValueKind.Pointer));
-                continue;
-            }
-
-            if (relocation.Type == RelocationTypeTlsModuleId)
-            {
-                var dtpmodValue = tlsModuleId == 0 ? 1u : tlsModuleId;
-                descriptors.Add(new RelocationDescriptor(
-                    targetAddress,
-                    0,
-                    null,
-                    dtpmodValue,
-                    RelocationValueKind.TlsModuleId));
-                continue;
-            }
-
-            var symbolIndex = relocation.SymbolIndex;
-            ElfSymbol symbol;
-            if (symbolIndex == 0)
-            {
-                symbol = default;
-            }
-            else if (!TryReadSymbol(symbolTable, symbolIndex, out symbol))
-            {
-                skippedSymbolRead++;
-                if (targetAddress >= FocusRelocGuestStart && targetAddress <= FocusRelocGuestEnd)
-                {
-                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] symbol read failed index={symbolIndex}");
-                }
-                continue;
-            }
-
-            var addend = relocation.Type is RelocationTypeGlobalData or RelocationTypeJumpSlot ? 0 : relocation.Addend;
-            var symbolBind = GetSymbolBind(symbol.Info);
-            if (symbolBind == SymbolBindLocal)
-            {
-                var symbolAddress = ResolveMappedAddressOrFallback(virtualMemory, symbol.Value, imageBase);
-                if (symbolAddress == 0)
-                {
-                    Console.Error.WriteLine(
-                        $"[LOADER] Skipping local relocation with invalid symbol value 0x{symbol.Value:X} " +
-                        $"at target 0x{targetAddress:X16}, type={relocation.Type}, sym={symbolIndex}");
-                    continue;
-                }
-
-                descriptors.Add(new RelocationDescriptor(
-                    targetAddress,
-                    addend,
-                    null,
-                    symbolAddress,
-                    RelocationValueKind.Pointer));
-                continue;
-            }
-
-            if (symbol.Value != 0)
-            {
-                var symbolAddress = ResolveMappedAddressOrFallback(virtualMemory, symbol.Value, imageBase);
-                if (symbolAddress == 0)
-                {
-                    Console.Error.WriteLine(
-                        $"[LOADER] Skipping relocation with invalid symbol value 0x{symbol.Value:X} " +
-                        $"at target 0x{targetAddress:X16}, type={relocation.Type}, sym={symbolIndex}");
-                    continue;
-                }
-
-                descriptors.Add(new RelocationDescriptor(
-                    targetAddress,
-                    addend,
-                    null,
-                    symbolAddress,
-                    RelocationValueKind.Pointer));
-                continue;
-            }
-
-            if (symbolBind is not (SymbolBindGlobal or SymbolBindWeak))
-            {
-                skippedNonImportBind++;
-                if (targetAddress >= FocusRelocGuestStart && targetAddress <= FocusRelocGuestEnd)
-                {
-                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] bind={symbolBind} not importable");
-                }
-                continue;
-            }
-
-            if (!TryReadNullTerminatedAscii(stringTable, symbol.NameOffset, out var symbolName))
-            {
-                skippedNameRead++;
-                if (targetAddress >= FocusRelocGuestStart && targetAddress <= FocusRelocGuestEnd)
-                {
-                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] symbol name read failed offset={symbol.NameOffset}");
-                }
-                continue;
-            }
-
-            var nid = ExtractNid(symbolName);
-            if (string.IsNullOrWhiteSpace(nid))
-            {
-                skippedEmptyNid++;
-                continue;
-            }
-
-            if (seenImportNids.Add(nid))
-            {
-                orderedImportNids.Add(nid);
-            }
-
-            descriptors.Add(new RelocationDescriptor(
-                targetAddress,
-                addend,
-                nid,
-                0,
-                RelocationValueKind.Pointer));
         }
 
         Console.WriteLine($"[LOADER] Found {orderedImportNids.Count} unique NIDs, {descriptors.Count} descriptors");
-        Console.WriteLine(
-            $"[LOADER] Reloc skip stats: unsupported={skippedUnsupported}, unmapped={skippedUnmapped}, symbolRead={skippedSymbolRead}, nonImportBind={skippedNonImportBind}, nameRead={skippedNameRead}, emptyNid={skippedEmptyNid}");
 
         if (descriptors.Count == 0)
         {
@@ -709,6 +620,8 @@ public sealed class SelfLoader : ISelfLoader
             return EmptyImportStubs;
         }
 
+        importedRelocations = BuildImportedRelocations(descriptors);
+
         var stubsByAddress = CreateImportStubMapping(virtualMemory, orderedImportNids);
         Console.WriteLine($"[LOADER] Created {stubsByAddress.Count} import stubs");
 
@@ -784,6 +697,237 @@ public sealed class SelfLoader : ISelfLoader
         return stubsByAddress;
     }
 
+    private static int AppendSectionRelocationDescriptors(
+        ReadOnlySpan<byte> imageData,
+        LoadContext loadContext,
+        ElfHeader elfHeader,
+        IVirtualMemory virtualMemory,
+        ulong imageBase,
+        uint tlsModuleId,
+        ICollection<RelocationDescriptor> descriptors,
+        IList<string> orderedImportNids,
+        ISet<string> seenImportNids)
+    {
+        if (elfHeader.SectionHeaderOffset == 0 ||
+            elfHeader.SectionHeaderCount == 0 ||
+            elfHeader.SectionHeaderEntrySize < ElfSectionHeaderSize)
+        {
+            return 0;
+        }
+
+        var appendedRelocations = 0;
+        for (var sectionIndex = 0; sectionIndex < elfHeader.SectionHeaderCount; sectionIndex++)
+        {
+            if (!TryReadSectionHeader(imageData, loadContext, elfHeader, sectionIndex, out var relocationHeader) ||
+                relocationHeader.Type != SectionTypeRela ||
+                relocationHeader.Size == 0 ||
+                relocationHeader.EntrySize < ElfRelocationSize)
+            {
+                continue;
+            }
+
+            if (!TryReadElfRelativeSlice(imageData, loadContext, relocationHeader.Offset, relocationHeader.Size, out var relocationTable))
+            {
+                continue;
+            }
+
+            var relocations = new List<ElfRelocation>(checked((int)(relocationHeader.Size / relocationHeader.EntrySize)));
+            CollectRelocations(relocationTable, relocations);
+            if (relocations.Count == 0)
+            {
+                continue;
+            }
+
+            ReadOnlySpan<byte> symbolTable = ReadOnlySpan<byte>.Empty;
+            ReadOnlySpan<byte> stringTable = ReadOnlySpan<byte>.Empty;
+            if (relocationHeader.Link < elfHeader.SectionHeaderCount &&
+                TryReadSectionHeader(imageData, loadContext, elfHeader, (int)relocationHeader.Link, out var symbolHeader) &&
+                symbolHeader.Size != 0 &&
+                symbolHeader.EntrySize >= ElfSymbolSize &&
+                TryReadElfRelativeSlice(imageData, loadContext, symbolHeader.Offset, symbolHeader.Size, out symbolTable) &&
+                symbolHeader.Link < elfHeader.SectionHeaderCount &&
+                TryReadSectionHeader(imageData, loadContext, elfHeader, (int)symbolHeader.Link, out var stringHeader) &&
+                stringHeader.Size != 0 &&
+                TryReadElfRelativeSlice(imageData, loadContext, stringHeader.Offset, stringHeader.Size, out stringTable))
+            {
+            }
+
+            AppendRelocationDescriptors(
+                relocations,
+                symbolTable,
+                stringTable,
+                virtualMemory,
+                imageBase,
+                tlsModuleId,
+                descriptors,
+                orderedImportNids,
+                seenImportNids);
+            appendedRelocations += relocations.Count;
+        }
+
+        return appendedRelocations;
+    }
+
+    private static void AppendRelocationDescriptors(
+        IReadOnlyList<ElfRelocation> relocations,
+        ReadOnlySpan<byte> symbolTable,
+        ReadOnlySpan<byte> stringTable,
+        IVirtualMemory virtualMemory,
+        ulong imageBase,
+        uint tlsModuleId,
+        ICollection<RelocationDescriptor> descriptors,
+        IList<string> orderedImportNids,
+        ISet<string> seenImportNids)
+    {
+        foreach (var relocation in relocations)
+        {
+            if (IsFocusRelocationOffset(relocation.Offset, imageBase))
+            {
+                Console.Error.WriteLine(
+                    $"[LOADER][FOCUS][SCAN] off=0x{relocation.Offset:X16} type={relocation.Type} sym={relocation.SymbolIndex} addend=0x{relocation.Addend:X}");
+            }
+
+            if (!IsSupportedRelocationType(relocation.Type))
+            {
+                if (IsFocusRelocationOffset(relocation.Offset, imageBase))
+                {
+                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] unsupported type={relocation.Type}");
+                }
+                continue;
+            }
+
+            if (!TryResolveMappedAddress(virtualMemory, relocation.Offset, imageBase, sizeof(ulong), out var targetAddress))
+            {
+                if (IsFocusRelocationOffset(relocation.Offset, imageBase))
+                {
+                    Console.Error.WriteLine("[LOADER][FOCUS][SKIP] target address not mapped");
+                }
+                continue;
+            }
+
+            if (relocation.Type == RelocationTypeRelative)
+            {
+                descriptors.Add(new RelocationDescriptor(
+                    targetAddress,
+                    relocation.Addend,
+                    null,
+                    imageBase,
+                    RelocationValueKind.Pointer,
+                    IsDataImport: false));
+                continue;
+            }
+
+            if (relocation.Type == RelocationTypeTlsModuleId)
+            {
+                var dtpmodValue = tlsModuleId == 0 ? 1u : tlsModuleId;
+                descriptors.Add(new RelocationDescriptor(
+                    targetAddress,
+                    0,
+                    null,
+                    dtpmodValue,
+                    RelocationValueKind.TlsModuleId,
+                    IsDataImport: false));
+                continue;
+            }
+
+            var symbolIndex = relocation.SymbolIndex;
+            ElfSymbol symbol;
+            if (symbolIndex == 0)
+            {
+                symbol = default;
+            }
+            else if (!TryReadSymbol(symbolTable, symbolIndex, out symbol))
+            {
+                if (targetAddress >= FocusRelocGuestStart && targetAddress <= FocusRelocGuestEnd)
+                {
+                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] symbol read failed index={symbolIndex}");
+                }
+                continue;
+            }
+
+            var addend = relocation.Type is RelocationTypeGlobalData or RelocationTypeJumpSlot ? 0 : relocation.Addend;
+            var symbolBind = GetSymbolBind(symbol.Info);
+            if (symbolBind == SymbolBindLocal)
+            {
+                var symbolAddress = ResolveMappedAddressOrFallback(virtualMemory, symbol.Value, imageBase);
+                if (symbolAddress == 0)
+                {
+                    Console.Error.WriteLine(
+                        $"[LOADER] Skipping local relocation with invalid symbol value 0x{symbol.Value:X} " +
+                        $"at target 0x{targetAddress:X16}, type={relocation.Type}, sym={symbolIndex}");
+                    continue;
+                }
+
+                descriptors.Add(new RelocationDescriptor(
+                    targetAddress,
+                    addend,
+                    null,
+                    symbolAddress,
+                    RelocationValueKind.Pointer,
+                    IsDataImport: false));
+                continue;
+            }
+
+            if (symbol.Value != 0)
+            {
+                var symbolAddress = ResolveMappedAddressOrFallback(virtualMemory, symbol.Value, imageBase);
+                if (symbolAddress == 0)
+                {
+                    Console.Error.WriteLine(
+                        $"[LOADER] Skipping relocation with invalid symbol value 0x{symbol.Value:X} " +
+                        $"at target 0x{targetAddress:X16}, type={relocation.Type}, sym={symbolIndex}");
+                    continue;
+                }
+
+                descriptors.Add(new RelocationDescriptor(
+                    targetAddress,
+                    addend,
+                    null,
+                    symbolAddress,
+                    RelocationValueKind.Pointer,
+                    IsDataImport: false));
+                continue;
+            }
+
+            if (symbolBind is not (SymbolBindGlobal or SymbolBindWeak))
+            {
+                if (targetAddress >= FocusRelocGuestStart && targetAddress <= FocusRelocGuestEnd)
+                {
+                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] bind={symbolBind} not importable");
+                }
+                continue;
+            }
+
+            if (!TryReadNullTerminatedAscii(stringTable, symbol.NameOffset, out var symbolName))
+            {
+                if (targetAddress >= FocusRelocGuestStart && targetAddress <= FocusRelocGuestEnd)
+                {
+                    Console.Error.WriteLine($"[LOADER][FOCUS][SKIP] symbol name read failed offset={symbol.NameOffset}");
+                }
+                continue;
+            }
+
+            var nid = ExtractNid(symbolName);
+            if (string.IsNullOrWhiteSpace(nid))
+            {
+                continue;
+            }
+
+            if (seenImportNids.Add(nid))
+            {
+                orderedImportNids.Add(nid);
+            }
+
+            descriptors.Add(new RelocationDescriptor(
+                targetAddress,
+                addend,
+                nid,
+                0,
+                RelocationValueKind.Pointer,
+                IsDataImport: GetSymbolType(symbol.Info) == SymbolTypeObject));
+        }
+    }
+
     private static void RegisterRuntimeSymbolsAndHooks(
         ReadOnlySpan<byte> imageData,
         LoadContext loadContext,
@@ -811,6 +955,159 @@ public sealed class SelfLoader : ISelfLoader
         }
     }
 
+    private static void CollectInitializerFunctions(
+        ReadOnlySpan<byte> imageData,
+        LoadContext loadContext,
+        IReadOnlyList<ProgramHeader> programHeaders,
+        IVirtualMemory virtualMemory,
+        ulong imageBase,
+        out ulong initFunctionEntryPoint,
+        out IReadOnlyList<ulong> preInitializerFunctions,
+        out IReadOnlyList<ulong> initializerFunctions)
+    {
+        initFunctionEntryPoint = 0;
+        preInitializerFunctions = EmptyInitializerFunctions;
+        initializerFunctions = EmptyInitializerFunctions;
+
+        if (!TryGetProgramHeader(programHeaders, ProgramHeaderType.Dynamic, out var dynamicHeader, out var dynamicHeaderIndex) ||
+            dynamicHeader.FileSize == 0)
+        {
+            return;
+        }
+
+        if (!TryLoadDynamicTableBytes(
+                imageData,
+                loadContext,
+                virtualMemory,
+                imageBase,
+                dynamicHeader,
+                dynamicHeaderIndex,
+                out var dynamicTable))
+        {
+            return;
+        }
+
+        var dynamicInfo = ParseDynamicInfo(dynamicTable);
+        var preInitializers = new List<ulong>(4);
+        var initializers = new List<ulong>(8);
+        initFunctionEntryPoint = ResolveMappedAddressOrFallback(virtualMemory, dynamicInfo.InitOffset, imageBase);
+        if (initFunctionEntryPoint < 0x10000)
+        {
+            initFunctionEntryPoint = 0;
+        }
+
+        AppendInitializerArrayEntries(
+            preInitializers,
+            imageData,
+            virtualMemory,
+            imageBase,
+            dynamicInfo.PreInitArrayOffset,
+            dynamicInfo.PreInitArraySize);
+
+        AppendResolvedInitializer(initializers, dynamicInfo.InitOffset, virtualMemory, imageBase);
+        AppendInitializerArrayEntries(
+            initializers,
+            imageData,
+            virtualMemory,
+            imageBase,
+            dynamicInfo.InitArrayOffset,
+            dynamicInfo.InitArraySize);
+
+        if (preInitializers.Count != 0)
+        {
+            preInitializerFunctions = preInitializers;
+        }
+
+        if (initializers.Count != 0)
+        {
+            initializerFunctions = initializers;
+        }
+
+        if (preInitializers.Count != 0 || initializers.Count != 0)
+        {
+            Console.Error.WriteLine(
+                $"[LOADER] Initializers discovered: preinit={preInitializers.Count}, init={initializers.Count}");
+        }
+    }
+
+    private static void AppendInitializerArrayEntries(
+        ICollection<ulong> destination,
+        ReadOnlySpan<byte> imageData,
+        IVirtualMemory virtualMemory,
+        ulong imageBase,
+        ulong arrayOffset,
+        ulong arraySize)
+    {
+        if (arrayOffset == 0 || arraySize < sizeof(ulong))
+        {
+            return;
+        }
+
+        if (!TryLoadTableBytes(imageData, virtualMemory, imageBase, arrayOffset, arraySize, out var arrayBytes))
+        {
+            return;
+        }
+
+        var entryCount = arrayBytes.Length / sizeof(ulong);
+        for (var i = 0; i < entryCount; i++)
+        {
+            var entryOffset = i * sizeof(ulong);
+            var entryAddress = BinaryPrimitives.ReadUInt64LittleEndian(arrayBytes.AsSpan(entryOffset, sizeof(ulong)));
+            AppendResolvedInitializer(destination, entryAddress, virtualMemory, imageBase);
+        }
+    }
+
+    private static void AppendResolvedInitializer(
+        ICollection<ulong> destination,
+        ulong functionAddress,
+        IVirtualMemory virtualMemory,
+        ulong imageBase)
+    {
+        var resolvedAddress = ResolveMappedAddressOrFallback(virtualMemory, functionAddress, imageBase);
+        if (resolvedAddress < 0x10000)
+        {
+            return;
+        }
+
+        foreach (var existing in destination)
+        {
+            if (existing == resolvedAddress)
+            {
+                return;
+            }
+        }
+
+        destination.Add(resolvedAddress);
+    }
+
+    private static IReadOnlyList<ImportedSymbolRelocation> BuildImportedRelocations(
+        IReadOnlyList<RelocationDescriptor> descriptors)
+    {
+        if (descriptors.Count == 0)
+        {
+            return Array.Empty<ImportedSymbolRelocation>();
+        }
+
+        var importedRelocations = new List<ImportedSymbolRelocation>(descriptors.Count);
+        foreach (var descriptor in descriptors)
+        {
+            if (descriptor.ImportNid is null || descriptor.ValueKind != RelocationValueKind.Pointer)
+            {
+                continue;
+            }
+
+            importedRelocations.Add(new ImportedSymbolRelocation(
+                descriptor.TargetAddress,
+                descriptor.Addend,
+                descriptor.ImportNid,
+                descriptor.IsDataImport));
+        }
+
+        return importedRelocations.Count == 0
+            ? Array.Empty<ImportedSymbolRelocation>()
+            : importedRelocations;
+    }
+
     private static int RegisterSectionRuntimeSymbols(
         ReadOnlySpan<byte> imageData,
         LoadContext loadContext,
@@ -909,9 +1206,18 @@ public sealed class SelfLoader : ISelfLoader
             return 0;
         }
 
-        var dynamicOffset = ResolvePhysicalSegmentOffset(imageData.Length, loadContext, dynamicHeader, dynamicHeaderIndex);
-        EnsureRange(imageData.Length, dynamicOffset, dynamicHeader.FileSize);
-        var dynamicTable = imageData.Slice((int)dynamicOffset, (int)dynamicHeader.FileSize);
+        if (!TryLoadDynamicTableBytes(
+                imageData,
+                loadContext,
+                virtualMemory,
+                imageBase,
+                dynamicHeader,
+                dynamicHeaderIndex,
+                out var dynamicTable))
+        {
+            return 0;
+        }
+
         var dynamicInfo = ParseDynamicInfo(dynamicTable);
         if (dynamicInfo.SymTabOffset == 0 || dynamicInfo.StrTabOffset == 0)
         {
@@ -1044,6 +1350,37 @@ public sealed class SelfLoader : ISelfLoader
         return true;
     }
 
+    private static bool TryLoadDynamicTableBytes(
+        ReadOnlySpan<byte> imageData,
+        LoadContext loadContext,
+        IVirtualMemory virtualMemory,
+        ulong imageBase,
+        ProgramHeader dynamicHeader,
+        int dynamicHeaderIndex,
+        out ReadOnlySpan<byte> dynamicTable)
+    {
+        if (TryLoadTableBytes(
+                imageData,
+                virtualMemory,
+                imageBase,
+                dynamicHeader.VirtualAddress,
+                dynamicHeader.FileSize,
+                out var loadedDynamicTable))
+        {
+            dynamicTable = loadedDynamicTable;
+            return true;
+        }
+
+        var dynamicOffset = ResolvePhysicalSegmentOffset(imageData.Length, loadContext, dynamicHeader, dynamicHeaderIndex);
+        if (!TrySlice(imageData, dynamicOffset, dynamicHeader.FileSize, out dynamicTable))
+        {
+            dynamicTable = default;
+            return false;
+        }
+
+        return true;
+    }
+
     private static bool TryReadElfRelativeSlice(
         ReadOnlySpan<byte> imageData,
         LoadContext loadContext,
@@ -1185,11 +1522,16 @@ public sealed class SelfLoader : ISelfLoader
         ulong strTabSize = 0;
         ulong symTabOffset = 0;
         ulong symTabSize = 0;
+        ulong initOffset = 0;
         ulong relaOffset = 0;
         ulong relaSize = 0;
         ulong jmpRelOffset = 0;
         ulong jmpRelSize = 0;
         ulong pltGotOffset = 0;
+        ulong initArrayOffset = 0;
+        ulong initArraySize = 0;
+        ulong preInitArrayOffset = 0;
+        ulong preInitArraySize = 0;
 
         for (var offset = 0; offset + DynamicEntrySize <= dynamicTable.Length; offset += DynamicEntrySize)
         {
@@ -1236,6 +1578,13 @@ public sealed class SelfLoader : ISelfLoader
                         relaSize = value;
                     }
 
+                    break;
+                case DtInit:
+                    if (initOffset == 0)
+                    {
+                        initOffset = value;
+                    }
+
                     break;
                 case DtJmpRel:
                     if (jmpRelOffset == 0)
@@ -1243,6 +1592,34 @@ public sealed class SelfLoader : ISelfLoader
                         jmpRelOffset = value;
                     }
 
+                    break;
+                case DtInitArray:
+                    if (initArrayOffset == 0)
+                    {
+                        initArrayOffset = value;
+                    }
+
+                    break;
+                case DtInitArraySize:
+                    if (initArraySize == 0)
+                    {
+                        initArraySize = value;
+                    }
+
+                    break;
+                case DtPreInitArray:
+                    if (preInitArrayOffset == 0)
+                    {
+                        preInitArrayOffset = value;
+                    }
+
+                    break;
+                case DtPreInitArraySize:
+                    if (preInitArraySize == 0)
+                    {
+                        preInitArraySize = value;
+                    }
+
                     break;
                 case DtPltRelSize:
                     if (jmpRelSize == 0)
@@ -1290,11 +1667,16 @@ public sealed class SelfLoader : ISelfLoader
             strTabSize,
             symTabOffset,
             symTabSize,
+            initOffset,
             relaOffset,
             relaSize,
             jmpRelOffset,
             jmpRelSize,
-            pltGotOffset);
+            pltGotOffset,
+            initArrayOffset,
+            initArraySize,
+            preInitArrayOffset,
+            preInitArraySize);
     }
 
     private static bool IsSupportedRelocationType(uint relocationType)
@@ -1512,6 +1894,11 @@ public sealed class SelfLoader : ISelfLoader
         return (byte)(info >> 4);
     }
 
+    private static byte GetSymbolType(byte info)
+    {
+        return (byte)(info & 0x0F);
+    }
+
     private static bool IsFocusRelocationOffset(ulong relocationOffset, ulong imageBase)
     {
         if (relocationOffset >= FocusRelocGuestStart && relocationOffset <= FocusRelocGuestEnd)
@@ -1896,11 +2283,16 @@ public sealed class SelfLoader : ISelfLoader
         ulong StrTabSize,
         ulong SymTabOffset,
         ulong SymTabSize,
+        ulong InitOffset,
         ulong RelaOffset,
         ulong RelaSize,
         ulong JmpRelOffset,
         ulong JmpRelSize,
-        ulong PltGotOffset)
+        ulong PltGotOffset,
+        ulong InitArrayOffset,
+        ulong InitArraySize,
+        ulong PreInitArrayOffset,
+        ulong PreInitArraySize)
     {
         public bool HasImportMetadata =>
             StrTabOffset != 0 &&
@@ -1947,7 +2339,8 @@ public sealed class SelfLoader : ISelfLoader
         long Addend,
         string? ImportNid,
         ulong SymbolValue,
-        RelocationValueKind ValueKind);
+        RelocationValueKind ValueKind,
+        bool IsDataImport);
 
     private enum SelfSegmentResolveStatus
     {

src/SharpEmu.Core/Memory/PhysicalVirtualMemory.cs

@@ -4,17 +4,28 @@
 using System.Runtime.InteropServices;
 using SharpEmu.Core.Loader;
 using SharpEmu.HLE;
+using SharpEmu.Logging;
 
 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 static readonly SharpEmuLogger Log = SharpEmuLog.For("VMEM");
+
+    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;
@@ -24,9 +35,14 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
     private const uint PAGE_EXECUTE_READWRITE = 0x40;
     private const uint PAGE_EXECUTE = 0x10;
     private const uint PAGE_EXECUTE_WRITECOPY = 0x80;
+    private const uint PAGE_NOACCESS = 0x01;
     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);
 
@@ -39,7 +55,14 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
     private static extern bool VirtualProtect(void* lpAddress, nuint dwSize, uint flNewProtect, out uint lpflOldProtect);
 
     [DllImport("kernel32.dll")]
-    private static extern void FlushInstructionCache(void* hProcess, void* lpBaseAddress, nuint dwSize);
+    private static extern nuint VirtualQuery(void* lpAddress, out MemoryBasicInformation64 lpBuffer, nuint dwLength);
+
+    [DllImport("kernel32.dll")]
+    private static extern void* GetCurrentProcess();
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool FlushInstructionCache(void* hProcess, void* lpBaseAddress, nuint dwSize);
 
     public bool TryAllocateAtExact(ulong desiredAddress, ulong size, bool executable, out ulong actualAddress)
     {
@@ -66,9 +89,10 @@ 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,
@@ -77,9 +101,13 @@ 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;
     }
 
@@ -93,7 +121,9 @@ 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)
@@ -122,9 +152,9 @@ 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)
             {
                 if (!executable)
@@ -176,12 +206,12 @@ 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
@@ -190,9 +220,10 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
             }
         }
 
-        lock (_gate)
+        _gate.EnterWriteLock();
+        try
         {
-            _regions.Add(new MemoryRegion
+            InsertRegionSorted(new MemoryRegion
             {
                 VirtualAddress = actualAddress,
                 Size = alignedSize,
@@ -201,24 +232,135 @@ 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();
+            finally
+            {
+                _gate.ExitWriteLock();
+            }
+
+            _guestAllocationArenaBase = 0;
+            _guestAllocationOffset = 0;
         }
     }
 
@@ -235,7 +377,8 @@ 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)
@@ -264,20 +407,39 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
                 NativeMemory.Clear((void*)(virtualAddress + (ulong)fileData.Length), (nuint)zeroFillSize);
             }
 
-            SetProtection(mapStart, mapSize, protection);
+            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();
+        }
+    }
+
+    private void ApplySegmentProtection(ulong mapStart, ulong mapEnd, ProgramHeaderFlags flags)
+    {
+        for (var pageAddress = mapStart; pageAddress < mapEnd; pageAddress += PageSize)
+        {
+            _pageProtections.TryGetValue(pageAddress, out var existingFlags);
+            var mergedFlags = existingFlags | flags;
+            _pageProtections[pageAddress] = mergedFlags;
+            SetProtection(pageAddress, PageSize, mergedFlags);
         }
     }
 
     private void SetProtection(ulong address, ulong size, ProgramHeaderFlags flags)
     {
         uint protection;
-        
-        if ((flags & ProgramHeaderFlags.Execute) != 0)
+
+        if (flags == ProgramHeaderFlags.None)
         {
-            protection = (flags & ProgramHeaderFlags.Write) != 0 
-                ? PAGE_EXECUTE_READWRITE 
+            protection = PAGE_NOACCESS;
+        }
+        else if ((flags & ProgramHeaderFlags.Execute) != 0)
+        {
+            protection = (flags & ProgramHeaderFlags.Write) != 0
+                ? PAGE_EXECUTE_READWRITE
                 : PAGE_EXECUTE_READ;
         }
         else if ((flags & ProgramHeaderFlags.Write) != 0)
@@ -296,89 +458,262 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
 
         if ((flags & ProgramHeaderFlags.Execute) != 0)
         {
-            FlushInstructionCache(null, (void*)address, (nuint)size);
+            FlushInstructionCache(GetCurrentProcess(), (void*)address, (nuint)size);
         }
     }
 
     public IReadOnlyList<VirtualMemoryRegion> SnapshotRegions()
     {
-        lock (_gate)
+        _gate.EnterReadLock();
+        try
         {
             var snapshot = new VirtualMemoryRegion[_regions.Count];
             for (var i = 0; i < _regions.Count; i++)
             {
                 var r = _regions[i];
                 snapshot[i] = new VirtualMemoryRegion(
-                    r.VirtualAddress, 
-                    r.Size, 
-                    0, 
-                    r.Size, 
+                    r.VirtualAddress,
+                    r.Size,
+                    0,
+                    r.Size,
                     r.IsExecutable ? ProgramHeaderFlags.Execute | ProgramHeaderFlags.Read : ProgramHeaderFlags.Read);
             }
             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)
+                {
+                    return true;
+                }
+
+                if (region.IsReservedOnly)
+                {
+                    if (!EnsureRangeCommitted((ulong)srcPtr, (ulong)destination.Length, region))
+                    {
+                        return false;
+                    }
+                }
+
+                if (!CanReadWithoutProtectionChange((ulong)srcPtr, (ulong)destination.Length, region))
+                {
+                    requiresExclusiveAccess = true;
+                }
+                else
                 {
-                    var srcPtr = (void*)(region.VirtualAddress + offset);
                     fixed (byte* destPtr = destination)
                     {
                         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(GetCurrentProcess(), destPtr, (nuint)source.Length);
+                }
+            }
+
+            return true;
+        }
+
+        return false;
     }
 
     public bool TryWriteUInt64(ulong virtualAddress, ulong value)
@@ -390,45 +725,146 @@ 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)
@@ -458,6 +894,135 @@ 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,
+        MemoryRegion region,
+        out List<(ulong Address, uint Protection)> touchedPages)
+    {
+        touchedPages = new List<(ulong Address, uint Protection)>();
+
+        var startPage = AlignDown(address, PageSize);
+        var endPage = AlignUp(address + size, PageSize);
+        var temporaryProtection = region.IsExecutable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
+
+        for (var pageAddress = startPage; pageAddress < endPage; pageAddress += PageSize)
+        {
+            if (!VirtualProtect((void*)pageAddress, (nuint)PageSize, temporaryProtection, out var oldProtection))
+            {
+                RestorePageProtections(touchedPages);
+                touchedPages.Clear();
+                return false;
+            }
+
+            touchedPages.Add((pageAddress, oldProtection));
+        }
+
+        return true;
+    }
+
+    private static void RestorePageProtections(List<(ulong Address, uint Protection)> touchedPages)
+    {
+        foreach (var (pageAddress, protection) in touchedPages)
+        {
+            VirtualProtect((void*)pageAddress, (nuint)PageSize, protection, out _);
+        }
+    }
+
     private static ulong AlignDown(ulong value, ulong alignment)
     {
         var mask = alignment - 1;
@@ -470,6 +1035,29 @@ 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;
+        }
+
+        Log.Debug(message);
+    }
+
     public void Dispose()
     {
         if (!_disposed)
@@ -487,4 +1075,17 @@ 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 +10,8 @@ using SharpEmu.HLE;
 using SharpEmu.Libs.VideoOut;
 using SharpEmu.Libs.Kernel;
 using SharpEmu.Libs.AppContent;
+using SharpEmu.Libs.SaveData;
+using SharpEmu.Logging;
 using System.Buffers.Binary;
 using System.Collections.Generic;
 using System.Linq;
@@ -19,6 +21,10 @@ namespace SharpEmu.Core.Runtime;
 
 public sealed class SharpEmuRuntime : ISharpEmuRuntime
 {
+    private static readonly SharpEmuLogger Log = SharpEmuLog.For("Runtime");
+
+    private readonly record struct LoadedModuleImage(string Path, SelfImage Image);
+
     private static readonly HashSet<string> PreloadSkipModules = new(StringComparer.OrdinalIgnoreCase)
     {
         "libkernel.prx",
@@ -123,30 +129,53 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
 
     public OrbisGen2Result Run(string ebootPath)
     {
-        Console.Error.WriteLine($"[RUNTIME] Loading: {ebootPath}");
+        var normalizedEbootPath = Path.GetFullPath(ebootPath);
+        using var app0Binding = BindApp0Root(normalizedEbootPath);
+        Log.Info($"Loading: {ebootPath}");
         LastExecutionDiagnostics = null;
         LastExecutionTrace = null;
         LastSessionSummary = null;
         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($"[RUNTIME] Entry: 0x{image.EntryPoint:X16}");
+        Log.Info($"Entry: 0x{image.EntryPoint:X16}");
         var generation = image.ElfHeader.AbiVersion == 2 ? Generation.Gen5 : Generation.Gen4;
         var activeImportStubs = new Dictionary<ulong, string>(image.ImportStubs);
         var activeRuntimeSymbols = new Dictionary<string, ulong>(image.RuntimeSymbols, StringComparer.Ordinal);
-        LoadAdjacentSceModules(ebootPath, activeImportStubs, activeRuntimeSymbols);
         var processImageName = Path.GetFileName(ebootPath);
         if (string.IsNullOrWhiteSpace(processImageName))
         {
             processImageName = "eboot.bin";
         }
 
-        Console.Error.WriteLine($"[RUNTIME] Dispatching, gen: {generation}");
-        Console.Error.WriteLine($"[RUNTIME] About to call DispatchEntry with entryPoint=0x{image.EntryPoint:X16}");
+        HleDataSymbols.ConfigureProcessImageName(processImageName);
+        MergeKnownHleDataSymbols(activeRuntimeSymbols);
+        var loadedModuleImages = LoadAdjacentSceModules(ebootPath, activeImportStubs, activeRuntimeSymbols);
+        RebindImportedDataSymbols(image, loadedModuleImages, activeRuntimeSymbols);
+        var initializerResult = RunAllInitializers(
+            image,
+            loadedModuleImages,
+            generation,
+            activeImportStubs,
+            activeRuntimeSymbols,
+            processImageName);
+        if (initializerResult is { } failedInitializerResult)
+        {
+            Log.Error($"Initializer dispatch failed: {failedInitializerResult}");
+            LastExecutionTrace = _cpuDispatcher.LastImportResolutionTrace;
+            LastMilestoneLog = _cpuDispatcher.LastMilestoneLog;
+            LastSessionSummary = BuildSessionSummary(_cpuDispatcher.LastSessionSummary);
+            LastBasicBlockTrace = _cpuDispatcher.LastBasicBlockTrace;
+            return failedInitializerResult;
+        }
+
+        Log.Info($"Dispatching, gen: {generation}");
+        Log.Debug($"About to call DispatchEntry with entryPoint=0x{image.EntryPoint:X16}");
 
         var result = _cpuDispatcher.DispatchEntry(
             image.EntryPoint,
@@ -156,8 +185,8 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
             processImageName,
             _cpuExecutionOptions);
 
-        Console.Error.WriteLine($"[RUNTIME] DispatchEntry returned: {result}");
-        Console.Error.WriteLine($"[RUNTIME] Dispatch result: {result}");
+        Log.Info($"DispatchEntry returned: {result}");
+        Log.Info($"Dispatch result: {result}");
         LastExecutionTrace = _cpuDispatcher.LastImportResolutionTrace;
         LastMilestoneLog = _cpuDispatcher.LastMilestoneLog;
         LastSessionSummary = BuildSessionSummary(_cpuDispatcher.LastSessionSummary);
@@ -328,21 +357,196 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         return result;
     }
 
-    private void LoadAdjacentSceModules(
+    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,
+        Generation generation,
+        IReadOnlyDictionary<ulong, string> activeImportStubs,
+        IReadOnlyDictionary<string, ulong> activeRuntimeSymbols,
+        string processImageName)
+    {
+        var moduleStartResult = RunPreloadedModuleInitializers(
+            loadedModuleImages,
+            generation,
+            activeImportStubs,
+            activeRuntimeSymbols);
+        if (moduleStartResult is not null)
+        {
+            return moduleStartResult;
+        }
+
+        // On current PS5 dumps DT_INIT commonly resolves to imageBase+0x10, which is inside
+        // the mapped ELF header rather than a callable guest routine. Startup must remain
+        // guest-driven until the PS5 init/module ABI is identified precisely.
+        return null;
+    }
+
+    private OrbisGen2Result? RunPreloadedModuleInitializers(
+        IReadOnlyList<LoadedModuleImage> loadedModuleImages,
+        Generation generation,
+        IReadOnlyDictionary<ulong, string> activeImportStubs,
+        IReadOnlyDictionary<string, ulong> activeRuntimeSymbols)
+    {
+        for (var i = 0; i < loadedModuleImages.Count; i++)
+        {
+            var loadedModule = loadedModuleImages[i];
+            var initEntryPoint = loadedModule.Image.InitFunctionEntryPoint;
+            if (initEntryPoint < 0x10000)
+            {
+                continue;
+            }
+
+            var moduleName = Path.GetFileName(loadedModule.Path);
+            if (string.IsNullOrWhiteSpace(moduleName))
+            {
+                moduleName = $"module#{i}";
+            }
+
+            Log.Info(
+                $"Starting module {moduleName}: dt_init=0x{initEntryPoint:X16}");
+
+            var result = _cpuDispatcher.DispatchModuleInitializer(
+                initEntryPoint,
+                generation,
+                activeImportStubs,
+                activeRuntimeSymbols,
+                moduleName,
+                _cpuExecutionOptions);
+            if (result != OrbisGen2Result.ORBIS_GEN2_OK)
+            {
+                Log.Error(
+                    $"Module start failed: {moduleName} -> {result}");
+                return result;
+            }
+        }
+
+        return null;
+    }
+
+    private OrbisGen2Result? RunImageInitializers(
+        string label,
+        SelfImage image,
+        Generation generation,
+        IReadOnlyDictionary<ulong, string> activeImportStubs,
+        IReadOnlyDictionary<string, ulong> activeRuntimeSymbols,
+        string processImageName)
+    {
+        if (image.PreInitializerFunctions.Count == 0 && image.InitializerFunctions.Count == 0)
+        {
+            return null;
+        }
+
+        Log.Info(
+            $"Running initializers for {label}: preinit={image.PreInitializerFunctions.Count}, init={image.InitializerFunctions.Count}");
+
+        var result = RunInitializerList(
+            $"{label}:preinit",
+            image.PreInitializerFunctions,
+            generation,
+            activeImportStubs,
+            activeRuntimeSymbols,
+            processImageName);
+        if (result is not null)
+        {
+            return result;
+        }
+
+        return RunInitializerList(
+            $"{label}:init",
+            image.InitializerFunctions,
+            generation,
+            activeImportStubs,
+            activeRuntimeSymbols,
+            processImageName);
+    }
+
+    private OrbisGen2Result? RunInitializerList(
+        string label,
+        IReadOnlyList<ulong> initializerFunctions,
+        Generation generation,
+        IReadOnlyDictionary<ulong, string> activeImportStubs,
+        IReadOnlyDictionary<string, ulong> activeRuntimeSymbols,
+        string processImageName)
+    {
+        for (var i = 0; i < initializerFunctions.Count; i++)
+        {
+            var initializerAddress = initializerFunctions[i];
+            if (initializerAddress < 0x10000)
+            {
+                continue;
+            }
+
+            Log.Debug(
+                $"  Initializer {label}[{i}] -> 0x{initializerAddress:X16}");
+
+            var result = _cpuDispatcher.DispatchEntry(
+                initializerAddress,
+                generation,
+                activeImportStubs,
+                activeRuntimeSymbols,
+                processImageName,
+                _cpuExecutionOptions);
+            if (result != OrbisGen2Result.ORBIS_GEN2_OK)
+            {
+                return result;
+            }
+        }
+
+        return null;
+    }
+
+    private List<LoadedModuleImage> LoadAdjacentSceModules(
         string ebootPath,
         IDictionary<ulong, string> importStubs,
         IDictionary<string, ulong> runtimeSymbols)
     {
+        var loadedImages = new List<LoadedModuleImage>();
         var ebootDirectory = Path.GetDirectoryName(ebootPath);
         if (string.IsNullOrWhiteSpace(ebootDirectory))
         {
-            return;
+            return loadedImages;
         }
 
         var moduleDirectories = new[]
         {
             Path.Combine(ebootDirectory, "sce_module"),
             Path.Combine(ebootDirectory, "sce_modules"),
+            Path.Combine(ebootDirectory, "Media", "Modules"),
         }
         .Distinct(StringComparer.OrdinalIgnoreCase)
         .Where(Directory.Exists)
@@ -350,11 +554,13 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
 
         if (moduleDirectories.Length == 0)
         {
-            return;
+            return loadedImages;
         }
 
         var allModulePaths = moduleDirectories
-            .SelectMany(Directory.EnumerateFiles)
+            .SelectMany(directory => Directory
+                .EnumerateFiles(directory)
+                .OrderBy(path => path, StringComparer.OrdinalIgnoreCase))
             .Where(path =>
             {
                 var extension = Path.GetExtension(path);
@@ -362,7 +568,6 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
                        string.Equals(extension, ".sprx", StringComparison.OrdinalIgnoreCase);
             })
             .Distinct(StringComparer.OrdinalIgnoreCase)
-            .OrderBy(path => path, StringComparer.OrdinalIgnoreCase)
             .ToArray();
 
         var modulePaths = allModulePaths
@@ -375,16 +580,16 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
             .ToArray();
         if (skippedModules.Length > 0)
         {
-            Console.Error.WriteLine($"[RUNTIME] Skipping {skippedModules.Length} core module(s): {string.Join(", ", skippedModules)}");
+            Log.Info($"Skipping {skippedModules.Length} core module(s): {string.Join(", ", skippedModules)}");
         }
 
         if (modulePaths.Length == 0)
         {
-            return;
+            return loadedImages;
         }
 
-        Console.Error.WriteLine($"[RUNTIME] Module search directories: {string.Join(", ", moduleDirectories)}");
-        Console.Error.WriteLine($"[RUNTIME] Loading {modulePaths.Length} module(s)...");
+        Log.Debug($"Module search directories: {string.Join(", ", moduleDirectories)}");
+        Log.Info($"Loading {modulePaths.Length} module(s)...");
         var loadedModules = 0;
         var failedModules = 0;
         var mergedImportCount = 0;
@@ -416,20 +621,119 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
                 mergedImportCount += MergeImportStubs(importStubs, moduleImage.ImportStubs, modulePath);
                 mergedSymbolCount += MergeRuntimeSymbols(runtimeSymbols, moduleImage.RuntimeSymbols);
                 RegisterLoadedModule(modulePath, moduleImage, isMain: false, isSystemModule: false);
+                loadedImages.Add(new LoadedModuleImage(modulePath, moduleImage));
                 loadedModules++;
 
-                Console.Error.WriteLine(
-                    $"[RUNTIME] Loaded module {Path.GetFileName(modulePath)}: entry=0x{moduleImage.EntryPoint:X16}, imports={moduleImage.ImportStubs.Count}, symbols={moduleImage.RuntimeSymbols.Count}");
+                Log.Info(
+                    $"Loaded module {Path.GetFileName(modulePath)}: entry=0x{moduleImage.EntryPoint:X16}, imports={moduleImage.ImportStubs.Count}, symbols={moduleImage.RuntimeSymbols.Count}");
             }
             catch (Exception ex)
             {
                 failedModules++;
-                Console.Error.WriteLine($"[RUNTIME] Module load failed: {modulePath} ({ex.GetType().Name}: {ex.Message})");
+                Log.Error($"Module load failed: {modulePath} ({ex.GetType().Name}: {ex.Message})", ex);
             }
         }
 
-        Console.Error.WriteLine(
-            $"[RUNTIME] Module preload summary: loaded={loadedModules}, failed={failedModules}, merged_imports={mergedImportCount}, merged_symbols={mergedSymbolCount}");
+        Log.Info(
+            $"Module preload summary: loaded={loadedModules}, failed={failedModules}, merged_imports={mergedImportCount}, merged_symbols={mergedSymbolCount}");
+        return loadedImages;
+    }
+
+    private void RebindImportedDataSymbols(
+        SelfImage mainImage,
+        IReadOnlyList<LoadedModuleImage> loadedModuleImages,
+        IReadOnlyDictionary<string, ulong> runtimeSymbols)
+    {
+        var rebound = 0;
+        var unresolved = 0;
+
+        rebound += RebindImportedDataSymbols(mainImage, runtimeSymbols, ref unresolved);
+        for (var i = 0; i < loadedModuleImages.Count; i++)
+        {
+            rebound += RebindImportedDataSymbols(loadedModuleImages[i].Image, runtimeSymbols, ref unresolved);
+        }
+
+        if (rebound != 0 || unresolved != 0)
+        {
+            Log.Info(
+                $"Imported data rebind: rebound={rebound}, unresolved={unresolved}");
+        }
+    }
+
+    private int RebindImportedDataSymbols(
+        SelfImage image,
+        IReadOnlyDictionary<string, ulong> runtimeSymbols,
+        ref int unresolved)
+    {
+        if (image.ImportedRelocations.Count == 0)
+        {
+            return 0;
+        }
+
+        var rebound = 0;
+        var logRebind = string.Equals(
+            Environment.GetEnvironmentVariable("SHARPEMU_LOG_DATA_REBIND"),
+            "1",
+            StringComparison.Ordinal);
+        for (var i = 0; i < image.ImportedRelocations.Count; i++)
+        {
+            var relocation = image.ImportedRelocations[i];
+            if (!relocation.IsData)
+            {
+                continue;
+            }
+
+            if (!runtimeSymbols.TryGetValue(relocation.Nid, out var symbolAddress) ||
+                !IsUsableRuntimeSymbolAddress(symbolAddress))
+            {
+                if (logRebind)
+                {
+                    Log.Warning(
+                        $"Imported data unresolved: nid={relocation.Nid} target=0x{relocation.TargetAddress:X16} addend=0x{unchecked((ulong)relocation.Addend):X16}");
+                }
+
+                unresolved++;
+                continue;
+            }
+
+            var reboundValue = AddSigned(symbolAddress, relocation.Addend);
+            if (!TryWriteUInt64(_virtualMemory, relocation.TargetAddress, reboundValue))
+            {
+                if (logRebind)
+                {
+                    Log.Error(
+                        $"Imported data write-failed: nid={relocation.Nid} target=0x{relocation.TargetAddress:X16} value=0x{reboundValue:X16}");
+                }
+
+                unresolved++;
+                continue;
+            }
+
+            if (logRebind)
+            {
+                Log.Debug(
+                    $"Imported data rebound: nid={relocation.Nid} target=0x{relocation.TargetAddress:X16} value=0x{reboundValue:X16}");
+            }
+
+            rebound++;
+        }
+
+        return rebound;
+    }
+
+    private static void MergeKnownHleDataSymbols(IDictionary<string, ulong> runtimeSymbols)
+    {
+        foreach (var nid in HleDataSymbols.EnumerateKnownNids())
+        {
+            if (runtimeSymbols.ContainsKey(nid) ||
+                !HleDataSymbols.TryGetAddress(nid, out var symbolAddress) ||
+                !IsUsableRuntimeSymbolAddress(symbolAddress))
+            {
+                continue;
+            }
+
+            runtimeSymbols[nid] = symbolAddress;
+        }
     }
 
     private static int MergeImportStubs(
@@ -444,8 +748,8 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
             {
                 if (!string.Equals(existingNid, nid, StringComparison.Ordinal))
                 {
-                    Console.Error.WriteLine(
-                        $"[RUNTIME] Import stub conflict at 0x{address:X16}: keep={existingNid}, skip={nid} ({Path.GetFileName(modulePath)})");
+                    Log.Warning(
+                        $"Import stub conflict at 0x{address:X16}: keep={existingNid}, skip={nid} ({Path.GetFileName(modulePath)})");
                 }
 
                 continue;
@@ -498,6 +802,24 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         return address >= 0x10000 && !IsUnresolvedRuntimeSentinel(address);
     }
 
+    private static bool TryWriteUInt64(IVirtualMemory virtualMemory, ulong address, ulong value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(ulong)];
+        BinaryPrimitives.WriteUInt64LittleEndian(bytes, value);
+        return virtualMemory.TryWrite(address, bytes);
+    }
+
+    private static ulong AddSigned(ulong value, long addend)
+    {
+        if (addend >= 0)
+        {
+            return unchecked(value + (ulong)addend);
+        }
+
+        var magnitude = unchecked((ulong)(-(addend + 1))) + 1;
+        return unchecked(value - magnitude);
+    }
+
     private static bool IsUnresolvedRuntimeSentinel(ulong value)
     {
         return value == 0xFFFEUL ||
@@ -536,8 +858,8 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
             image.EntryPoint,
             isMain,
             isSystemModule);
-        Console.Error.WriteLine(
-            $"[RUNTIME] Registered module handle={handle} name={Path.GetFileName(modulePath)} base=0x{baseAddress:X16} size=0x{size:X16}");
+        Log.Info(
+            $"Registered module handle={handle} name={Path.GetFileName(modulePath)} base=0x{baseAddress:X16} size=0x{size:X16}");
     }
 
     private static bool TryComputeImageRange(SelfImage image, out ulong baseAddress, out ulong size)

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 +1,198 @@
+<!--
+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>
+
+    <LinearGradientBrush x:Key="BgBrush" StartPoint="0%,0%" EndPoint="100%,100%">
+      <GradientStop Offset="0" Color="#12151F" />
+      <GradientStop Offset="0.55" Color="#0D1017" />
+      <GradientStop Offset="1" Color="#0B0D14" />
+    </LinearGradientBrush>
+
+    <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" />
+    <SolidColorBrush x:Key="TileHoverBrush" Color="#1A2130" />
+    <SolidColorBrush x:Key="TileSelectedBrush" Color="#212A3F" />
+  </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="12" />
+      <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="TextBox">
+      <Setter Property="CornerRadius" Value="8" />
+    </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="ToggleButton.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="ToggleButton.ghost:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource ElevatedBrush}" />
+      <Setter Property="Foreground" Value="{StaticResource TextBrush}" />
+    </Style>
+    <Style Selector="ToggleButton.ghost:checked /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource ElevatedBrush}" />
+      <Setter Property="BorderBrush" Value="{StaticResource AccentBrush}" />
+      <Setter Property="Foreground" Value="{StaticResource TextBrush}" />
+    </Style>
+
+    <Style Selector="ContextMenu">
+      <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="6" />
+    </Style>
+    <Style Selector="ContextMenu MenuItem">
+      <Setter Property="Padding" Value="10,7" />
+      <Setter Property="CornerRadius" Value="7" />
+    </Style>
+    <Style Selector="ContextMenu Separator">
+      <Setter Property="Background" Value="{StaticResource CardBorderBrush}" />
+      <Setter Property="Height" Value="1" />
+      <Setter Property="Margin" Value="8,4" />
+    </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>
+
+    <!-- Cover-art library grid -->
+    <Style Selector="ListBox.tileGrid ListBoxItem">
+      <Setter Property="Padding" Value="10" />
+      <Setter Property="Margin" Value="5" />
+      <Setter Property="CornerRadius" Value="14" />
+      <Setter Property="Background" Value="Transparent" />
+      <Setter Property="BorderThickness" Value="1" />
+      <Setter Property="BorderBrush" Value="Transparent" />
+      <Setter Property="RenderTransform" Value="translateY(0px)" />
+      <Setter Property="Transitions">
+        <Transitions>
+          <TransformOperationsTransition Property="RenderTransform" Duration="0:0:0.12" />
+        </Transitions>
+      </Setter>
+    </Style>
+    <Style Selector="ListBox.tileGrid ListBoxItem:pointerover">
+      <Setter Property="RenderTransform" Value="translateY(-3px)" />
+    </Style>
+    <Style Selector="ListBox.tileGrid ListBoxItem:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource TileHoverBrush}" />
+    </Style>
+    <Style Selector="ListBox.tileGrid ListBoxItem:selected /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource TileSelectedBrush}" />
+      <Setter Property="BorderBrush" Value="{StaticResource AccentBrush}" />
+    </Style>
+    <Style Selector="ListBox.tileGrid ListBoxItem:selected:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+      <Setter Property="Background" Value="{StaticResource TileSelectedBrush}" />
+      <Setter Property="BorderBrush" Value="{StaticResource AccentHoverBrush}" />
+    </Style>
+
+    <Style Selector="Border.coverShadow">
+      <Setter Property="CornerRadius" Value="10" />
+      <Setter Property="BoxShadow" Value="0 6 14 0 #55000000" />
+    </Style>
+    <Style Selector="Border.coverClip">
+      <Setter Property="CornerRadius" Value="10" />
+      <Setter Property="ClipToBounds" Value="True" />
+      <Setter Property="Background" Value="{StaticResource ElevatedBrush}" />
+    </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 +1,156 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.ComponentModel;
+using Avalonia;
+using Avalonia.Media;
+using Avalonia.Media.Imaging;
+
+namespace SharpEmu.GUI;
+
+public sealed class GameEntry : INotifyPropertyChanged
+{
+    // Placeholder gradients for games without cover art, picked
+    // deterministically from the game name so a game keeps its color.
+    private static readonly (Color Start, Color End)[] PlaceholderPalette =
+    {
+        (Color.Parse("#5B4B8A"), Color.Parse("#2C2A4A")),
+        (Color.Parse("#1F6E8C"), Color.Parse("#173B45")),
+        (Color.Parse("#7A4069"), Color.Parse("#3B1C32")),
+        (Color.Parse("#2D6A4F"), Color.Parse("#1B3A2B")),
+        (Color.Parse("#8C5425"), Color.Parse("#4A2B12")),
+        (Color.Parse("#4F6D9E"), Color.Parse("#263349")),
+        (Color.Parse("#8A4B4B"), Color.Parse("#3F2222")),
+        (Color.Parse("#3E7C7B"), Color.Parse("#1E3D3C")),
+    };
+
+    private Bitmap? _cover;
+    private IBrush? _placeholderBrush;
+    private long _sizeBytes;
+
+    public GameEntry(
+        string name, string? titleId, string path, long sizeBytes, string? coverPath, string? backgroundPath)
+    {
+        Name = name;
+        TitleId = titleId;
+        Path = path;
+        _sizeBytes = sizeBytes;
+        CoverPath = coverPath;
+        BackgroundPath = backgroundPath;
+        Initials = ComputeInitials(name);
+    }
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    public string Name { get; }
+
+    public string? TitleId { get; }
+
+    public string Path { get; }
+
+    /// <summary>
+    /// Total size of the game. Initially the eboot's own size from the scan;
+    /// replaced with the full install folder size once computed in the
+    /// background.
+    /// </summary>
+    public long SizeBytes
+    {
+        get => _sizeBytes;
+        set
+        {
+            if (_sizeBytes == value)
+            {
+                return;
+            }
+
+            _sizeBytes = value;
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(SizeBytes)));
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Detail)));
+        }
+    }
+
+    /// <summary>Path to the cover art image shipped with the game, if found.</summary>
+    public string? CoverPath { get; }
+
+    /// <summary>Path to the key art (pic0/pic1) shipped with the game, if found.</summary>
+    public string? BackgroundPath { get; }
+
+    /// <summary>
+    /// Decoded key art used as the window backdrop while this game is
+    /// selected. Loaded on demand and cached; not exposed via binding.
+    /// </summary>
+    public Bitmap? Background { get; set; }
+
+    public string Initials { get; }
+
+    // Built lazily: brushes are AvaloniaObjects that must be created on the
+    // UI thread, while GameEntry itself is constructed on the scan thread.
+    public IBrush PlaceholderBrush => _placeholderBrush ??= BuildPlaceholderBrush(Name);
+
+    /// <summary>Decoded cover art; loaded asynchronously after the library scan.</summary>
+    public Bitmap? Cover
+    {
+        get => _cover;
+        set
+        {
+            if (ReferenceEquals(_cover, value))
+            {
+                return;
+            }
+
+            _cover = value;
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Cover)));
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(HasCover)));
+        }
+    }
+
+    public bool HasCover => _cover is not null;
+
+    public string Detail => TitleId is not null
+        ? $"{TitleId}  •  {FormatSize(SizeBytes)}"
+        : FormatSize(SizeBytes);
+
+    private static string ComputeInitials(string name)
+    {
+        var initials = name
+            .Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
+            .Where(word => char.IsLetterOrDigit(word[0]))
+            .Select(word => char.ToUpperInvariant(word[0]))
+            .Take(2)
+            .ToArray();
+
+        return initials.Length > 0 ? new string(initials) : "?";
+    }
+
+    private static IBrush BuildPlaceholderBrush(string name)
+    {
+        var hash = 0;
+        foreach (var ch in name)
+        {
+            hash = unchecked(hash * 31 + ch);
+        }
+
+        var (start, end) = PlaceholderPalette[(int)((uint)hash % PlaceholderPalette.Length)];
+        return new LinearGradientBrush
+        {
+            StartPoint = new RelativePoint(0, 0, RelativeUnit.Relative),
+            EndPoint = new RelativePoint(1, 1, RelativeUnit.Relative),
+            GradientStops =
+            {
+                new GradientStop(start, 0),
+                new GradientStop(end, 1),
+            },
+        };
+    }
+
+    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 +1,67 @@
+// 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();
+
+    /// <summary>Eboot paths hidden from the library via "Remove from library".</summary>
+    public List<string> ExcludedGames { 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 +1,265 @@
+<!--
+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="820"
+        MinWidth="980" MinHeight="640"
+        WindowStartupLocation="CenterScreen"
+        Background="{StaticResource BgBrush}"
+        ExtendClientAreaToDecorationsHint="True"
+        ExtendClientAreaChromeHints="PreferSystemChrome"
+        ExtendClientAreaTitleBarHeightHint="44"
+        Icon="avares://SharpEmu.GUI/Assets/SharpEmu.ico">
+
+  <Grid RowDefinitions="44,*,32">
+
+    <!-- Selected-game backdrop: key art behind the main content, dimmed by
+         a scrim so tiles and text stay readable. Fades on selection. -->
+    <Panel Grid.Row="1" ClipToBounds="True">
+      <Image x:Name="BackdropImage" Stretch="UniformToFill" Opacity="0"
+             HorizontalAlignment="Center" VerticalAlignment="Center">
+        <Image.Transitions>
+          <Transitions>
+            <DoubleTransition Property="Opacity" Duration="0:0:0.35" />
+          </Transitions>
+        </Image.Transitions>
+      </Image>
+      <Border>
+        <Border.Background>
+          <LinearGradientBrush StartPoint="0%,0%" EndPoint="0%,100%">
+            <GradientStop Offset="0" Color="#730D1017" />
+            <GradientStop Offset="0.55" Color="#BF0D1017" />
+            <GradientStop Offset="1" Color="#EB0D1017" />
+          </LinearGradientBrush>
+        </Border.Background>
+      </Border>
+    </Panel>
+
+    <!-- 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/SharpEmu.ico" Width="20" Height="20"
+               RenderOptions.BitmapInterpolationMode="HighQuality" />
+        <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="18,14,18,14" RowDefinitions="Auto,*,Auto,Auto">
+
+      <!-- Library toolbar -->
+      <Grid Grid.Row="0" ColumnDefinitions="Auto,Auto,*,Auto,Auto,Auto,Auto" Margin="6,0,6,12">
+        <TextBlock Grid.Column="0" Text="Library" FontSize="22" FontWeight="Bold" VerticalAlignment="Center" />
+        <Border Grid.Column="1" Classes="pill" Margin="12,2,0,0" VerticalAlignment="Center">
+          <TextBlock x:Name="GameCountText" Text="0 games" FontSize="11" Foreground="{StaticResource MutedBrush}" />
+        </Border>
+        <TextBox Grid.Column="3" x:Name="SearchBox" Watermark="Search library…" Width="280"
+                 VerticalAlignment="Center" Margin="0,0,12,0" />
+        <Button Grid.Column="4" x:Name="AddFolderButton" Classes="ghost" Content="＋ Add folder"
+                VerticalAlignment="Center" Margin="0,0,8,0" />
+        <Button Grid.Column="5" x:Name="RescanButton" Classes="ghost" Content="⟳ Rescan"
+                VerticalAlignment="Center" Margin="0,0,8,0" />
+        <Button Grid.Column="6" x:Name="OpenFileButton" Classes="ghost" Content="Open file…"
+                VerticalAlignment="Center" />
+      </Grid>
+
+      <!-- Cover-art grid -->
+      <Panel Grid.Row="1">
+        <ListBox x:Name="GameList" Classes="tileGrid" Background="Transparent"
+                 SelectionMode="Single" Padding="0">
+          <ListBox.ContextMenu>
+            <ContextMenu x:Name="GameContextMenu" Placement="Pointer">
+              <MenuItem x:Name="CtxLaunch" Header="Launch" FontWeight="SemiBold">
+                <MenuItem.Icon>
+                  <TextBlock Text="▶" FontSize="11" Foreground="{StaticResource AccentHoverBrush}"
+                             HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </MenuItem.Icon>
+              </MenuItem>
+              <MenuItem x:Name="CtxOpenFolder" Header="Open game folder">
+                <MenuItem.Icon>
+                  <TextBlock Text="📂" FontSize="12" HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </MenuItem.Icon>
+              </MenuItem>
+              <Separator />
+              <MenuItem x:Name="CtxCopyPath" Header="Copy path">
+                <MenuItem.Icon>
+                  <TextBlock Text="⧉" FontSize="13" Foreground="{StaticResource MutedBrush}"
+                             HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </MenuItem.Icon>
+              </MenuItem>
+              <MenuItem x:Name="CtxCopyTitleId" Header="Copy title ID">
+                <MenuItem.Icon>
+                  <TextBlock Text="⧉" FontSize="13" Foreground="{StaticResource MutedBrush}"
+                             HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </MenuItem.Icon>
+              </MenuItem>
+              <Separator />
+              <MenuItem x:Name="CtxRemove" Header="Remove from library"
+                        Foreground="{StaticResource DangerHoverBrush}">
+                <MenuItem.Icon>
+                  <TextBlock Text="✕" FontSize="12" Foreground="{StaticResource DangerHoverBrush}"
+                             HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </MenuItem.Icon>
+              </MenuItem>
+            </ContextMenu>
+          </ListBox.ContextMenu>
+          <ListBox.ItemsPanel>
+            <ItemsPanelTemplate>
+              <WrapPanel />
+            </ItemsPanelTemplate>
+          </ListBox.ItemsPanel>
+          <ListBox.ItemTemplate>
+            <DataTemplate>
+              <StackPanel Width="128" Height="186" Spacing="7">
+                <Border Classes="coverShadow" Width="128" Height="128">
+                  <Border Classes="coverClip">
+                    <Panel>
+                      <Border Background="{Binding PlaceholderBrush}" IsVisible="{Binding !HasCover}">
+                        <TextBlock Text="{Binding Initials}" FontSize="36" FontWeight="Bold"
+                                   Foreground="#E8ECF4" Opacity="0.85"
+                                   HorizontalAlignment="Center" VerticalAlignment="Center" />
+                      </Border>
+                      <Image Source="{Binding Cover}" Stretch="UniformToFill" IsVisible="{Binding HasCover}" />
+                    </Panel>
+                  </Border>
+                </Border>
+                <StackPanel Spacing="2">
+                  <TextBlock Text="{Binding Name}" FontSize="13" FontWeight="SemiBold"
+                             TextWrapping="Wrap" MaxLines="2" TextTrimming="CharacterEllipsis" />
+                  <TextBlock Text="{Binding Detail}" FontSize="11" Foreground="{StaticResource MutedBrush}"
+                             TextTrimming="CharacterEllipsis" />
+                </StackPanel>
+              </StackPanel>
+            </DataTemplate>
+          </ListBox.ItemTemplate>
+        </ListBox>
+
+        <!-- Empty state -->
+        <StackPanel x:Name="EmptyState" Spacing="10" HorizontalAlignment="Center" VerticalAlignment="Center"
+                    IsVisible="False">
+          <TextBlock Text="🎮" FontSize="44" HorizontalAlignment="Center" Opacity="0.7" />
+          <TextBlock x:Name="EmptyStateTitle" Text="Your library is empty" FontSize="18" FontWeight="SemiBold"
+                     HorizontalAlignment="Center" />
+          <TextBlock x:Name="EmptyStateHint" Text="Add a folder containing your games to get started."
+                     FontSize="13" Foreground="{StaticResource MutedBrush}" HorizontalAlignment="Center" />
+          <Button x:Name="EmptyAddFolderButton" Classes="accent" Content="＋ Add game folder"
+                  HorizontalAlignment="Center" Margin="0,8,0,0" />
+        </StackPanel>
+      </Panel>
+
+      <!-- Console (collapsible) -->
+      <Border Grid.Row="2" x:Name="ConsolePanel" Classes="card" Padding="0" Height="240"
+              Margin="0,12,0,0" IsVisible="False">
+        <Grid RowDefinitions="Auto,*">
+          <Grid Grid.Row="0" ColumnDefinitions="*,Auto,Auto,Auto" Margin="16,12,16,8">
+            <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="0,0,12,12">
+            <ListBox.ItemTemplate>
+              <DataTemplate>
+                <TextBlock Text="{Binding Text}" Foreground="{Binding Brush}" TextWrapping="NoWrap" />
+              </DataTemplate>
+            </ListBox.ItemTemplate>
+          </ListBox>
+        </Grid>
+      </Border>
+
+      <!-- Launch bar -->
+      <Border Grid.Row="3" Classes="card" Margin="0,12,0,0" Padding="14">
+        <StackPanel Spacing="14">
+          <Grid ColumnDefinitions="Auto,*,Auto">
+
+            <!-- Selected game cover thumbnail -->
+            <Border Grid.Column="0" Classes="coverClip" Width="56" Height="56" CornerRadius="8"
+                    VerticalAlignment="Center">
+              <Panel x:Name="SelectedCoverPanel">
+                <Border Background="{Binding PlaceholderBrush, FallbackValue={x:Null}}"
+                        IsVisible="{Binding !HasCover, FallbackValue=False}">
+                  <TextBlock Text="{Binding Initials}" FontSize="20" FontWeight="Bold"
+                             Foreground="#E8ECF4" Opacity="0.85"
+                             HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </Border>
+                <Image Source="{Binding Cover}" Stretch="UniformToFill"
+                       IsVisible="{Binding HasCover, FallbackValue=False}" />
+              </Panel>
+            </Border>
+
+            <StackPanel Grid.Column="1" Spacing="3" VerticalAlignment="Center" Margin="14,0,14,0">
+              <TextBlock x:Name="SelectedGameTitle" Text="No game selected" FontSize="16" FontWeight="Bold"
+                         TextTrimming="CharacterEllipsis" />
+              <TextBlock x:Name="SelectedGamePath" Text="Pick a game from the library, or open an eboot.bin directly."
+                         FontSize="11" Foreground="{StaticResource MutedBrush}" TextTrimming="CharacterEllipsis" />
+              <StackPanel Orientation="Horizontal" Spacing="7">
+                <Ellipse x:Name="StatusDot" Width="8" Height="8" Fill="{StaticResource FaintBrush}"
+                         VerticalAlignment="Center" />
+                <TextBlock x:Name="StatusText" Text="Idle" FontSize="11" Foreground="{StaticResource MutedBrush}"
+                           VerticalAlignment="Center" />
+              </StackPanel>
+            </StackPanel>
+
+            <StackPanel Grid.Column="2" Orientation="Horizontal" Spacing="8" VerticalAlignment="Center">
+              <ToggleButton x:Name="OptionsToggle" Classes="ghost" Content="⚙ Options" />
+              <ToggleButton x:Name="ConsoleToggle" Classes="ghost" Content="≡ Console" />
+              <Button x:Name="LaunchButton" Classes="accent" Content="▶  Launch" IsEnabled="False" />
+              <Button x:Name="StopButton" Classes="danger" Content="■  Stop" IsEnabled="False" />
+            </StackPanel>
+          </Grid>
+
+          <!-- Launch options (collapsible) -->
+          <WrapPanel x:Name="OptionsPanel" IsVisible="False">
+            <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>
+    </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/SharpEmu.GUI.csproj

@@ -0,0 +1,35 @@
+<!--
+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\SharpEmu.ico" Link="Assets/SharpEmu.ico" />
+  </ItemGroup>
+
+  <!-- The DualSense HID reader is shared with the emulator's pad HLE. It is
+       dependency-free, so it is compiled in directly rather than pulling a
+       reference to all of SharpEmu.Libs into the launcher. -->
+  <ItemGroup>
+    <Compile Include="..\SharpEmu.Libs\Pad\HidNative.cs" Link="Input/HidNative.cs" />
+    <Compile Include="..\SharpEmu.Libs\Pad\DualSenseReader.cs" Link="Input/DualSenseReader.cs" />
+  </ItemGroup>
+
+</Project>

src/SharpEmu.GUI/packages.lock.json

@@ -0,0 +1,186 @@
+{
+  "version": 2,
+  "dependencies": {
+    "net10.0": {
+      "Avalonia": {
+        "type": "Direct",
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+        "dependencies": {
+          "Avalonia.BuildServices": "11.3.2",
+          "Avalonia.Remote.Protocol": "11.3.18",
+          "MicroCom.Runtime": "0.11.0"
+        }
+      },
+      "Avalonia.Desktop": {
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+        "requested": "[11.3.18, )",
+        "resolved": "11.3.18",
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+        "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": {
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+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
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+      "Avalonia.Themes.Fluent": {
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+        "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": {
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+      },
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+      },
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+        "dependencies": {
+          "Avalonia": "11.3.18",
+          "Tmds.DBus.Protocol": "0.21.3"
+        }
+      },
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+        "dependencies": {
+          "Avalonia": "11.3.18"
+        }
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+        "type": "Transitive",
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+        "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 +125,91 @@ 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 TryReadUInt16(ulong address, out ushort value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(ushort)];
+        if (!Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt16LittleEndian(bytes);
+        return true;
+    }
+
+    public bool TryWriteUInt16(ulong address, ushort value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(ushort)];
+        BinaryPrimitives.WriteUInt16LittleEndian(buffer, value);
+        return Memory.TryWrite(address, buffer);
+    }
+
+    public bool TryReadInt32(ulong address, out int value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        if (!Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadInt32LittleEndian(bytes);
+        return true;
+    }
+
+    public bool TryWriteInt32(ulong address, int value, bool checkNil = false)
+    {
+        if (checkNil && address == 0)
+        {
+            return false;
+        }
+
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(bytes, value);
+        return Memory.TryWrite(address, bytes);
+    }
+
+    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 TryWriteInt64(ulong address, long value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(long)];
+        BinaryPrimitives.WriteInt64LittleEndian(buffer, value);
+        return Memory.TryWrite(address, buffer);
+    }
+
     public bool TryReadUInt64(ulong address, out ulong value)
     {
         Span<byte> buffer = stackalloc byte[sizeof(ulong)];
@@ -150,6 +230,33 @@ 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];
@@ -169,4 +276,23 @@ public sealed class CpuContext
         this[CpuRegister.Rsp] = rsp + sizeof(ulong);
         return true;
     }
+
+    public int SetReturn(int result, Type? cast = null)
+    {
+        var value = cast switch
+        {
+            null => (ulong)result,
+            _ when cast == typeof(long) => (ulong)(long)result,
+            _ => throw new NotSupportedException(),
+        };
+
+        this[CpuRegister.Rax] = unchecked(value);
+        return result;
+    }
+
+    public int SetReturn(OrbisGen2Result result)
+    {
+        this[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
 }

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/HleDataSymbols.cs

@@ -0,0 +1,130 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace SharpEmu.HLE;
+
+public static class HleDataSymbols
+{
+    private const string StackChkGuardNid = "f7uOxY9mM1U";
+    private const string ProgNameNid = "djxxOmW6-aw";
+    private const string LibcNeedFlagNid = "P330P3dFF68";
+    private const string LibcInternalNeedFlagNid = "ZT4ODD2Ts9o";
+    private const int ProgNameMaxBytes = 511;
+    private const ulong StackChkGuardValue = 0xC0DEC0DECAFEBABEUL;
+
+    private static readonly object _gate = new();
+    private static readonly nint _stackChkGuardAddress = Allocate(sizeof(ulong) * 2);
+    private static readonly nint _progNameBufferAddress = Allocate(ProgNameMaxBytes + 1);
+    private static readonly nint _progNamePointerAddress = Allocate(nint.Size);
+    private static readonly nint _libcNeedFlagAddress = Allocate(sizeof(uint));
+    private static readonly nint _libcInternalNeedFlagAddress = Allocate(sizeof(uint));
+
+    static HleDataSymbols()
+    {
+        if (_stackChkGuardAddress != 0)
+        {
+            Marshal.WriteInt64(_stackChkGuardAddress, unchecked((long)StackChkGuardValue));
+            Marshal.WriteInt64(
+                IntPtr.Add(_stackChkGuardAddress, sizeof(ulong)),
+                unchecked((long)StackChkGuardValue));
+        }
+
+        if (_libcNeedFlagAddress != 0)
+        {
+            Marshal.WriteInt32(_libcNeedFlagAddress, 1);
+        }
+
+        if (_libcInternalNeedFlagAddress != 0)
+        {
+            Marshal.WriteInt32(_libcInternalNeedFlagAddress, 1);
+        }
+
+        ConfigureProcessImageName("eboot.bin");
+    }
+
+    public static IEnumerable<string> EnumerateKnownNids()
+    {
+        yield return StackChkGuardNid;
+        yield return ProgNameNid;
+        yield return LibcNeedFlagNid;
+        yield return LibcInternalNeedFlagNid;
+    }
+
+    public static void ConfigureProcessImageName(string? processImageName)
+    {
+        var effectiveName = string.IsNullOrWhiteSpace(processImageName)
+            ? "eboot.bin"
+            : processImageName;
+        var encodedName = Encoding.UTF8.GetBytes(effectiveName);
+        var byteCount = Math.Min(encodedName.Length, ProgNameMaxBytes);
+
+        lock (_gate)
+        {
+            if (_progNameBufferAddress == 0 || _progNamePointerAddress == 0)
+            {
+                return;
+            }
+
+            for (var i = 0; i <= ProgNameMaxBytes; i++)
+            {
+                Marshal.WriteByte(_progNameBufferAddress, i, 0);
+            }
+
+            Marshal.Copy(encodedName, 0, _progNameBufferAddress, byteCount);
+            WritePointer(_progNamePointerAddress, _progNameBufferAddress);
+        }
+    }
+
+    public static bool TryGetAddress(string nid, out ulong address)
+    {
+        var pointer = nid switch
+        {
+            StackChkGuardNid => _stackChkGuardAddress,
+            ProgNameNid => _progNamePointerAddress,
+            LibcNeedFlagNid => _libcNeedFlagAddress,
+            LibcInternalNeedFlagNid => _libcInternalNeedFlagAddress,
+            _ => 0,
+        };
+
+        if (pointer == 0)
+        {
+            address = 0;
+            return false;
+        }
+
+        address = unchecked((ulong)pointer);
+        return true;
+    }
+
+    private static nint Allocate(int size)
+    {
+        try
+        {
+            var memory = Marshal.AllocHGlobal(size);
+            for (var i = 0; i < size; i++)
+            {
+                Marshal.WriteByte(memory, i, 0);
+            }
+
+            return memory;
+        }
+        catch
+        {
+            return 0;
+        }
+    }
+
+    private static void WritePointer(nint target, nint value)
+    {
+        if (nint.Size == sizeof(int))
+        {
+            Marshal.WriteInt32(target, value.ToInt32());
+            return;
+        }
+
+        Marshal.WriteInt64(target, value.ToInt64());
+    }
+}

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/IModuleManager.cs

@@ -17,5 +17,7 @@ public interface IModuleManager
 
     bool TryGetExportByName(string exportName, out ExportedFunction export);
 
+    bool TryDispatch(string nid, CpuContext context, out OrbisGen2Result result);
+
     OrbisGen2Result Dispatch(string nid, CpuContext context);
 }

src/SharpEmu.HLE/ModuleManager.cs

@@ -47,6 +47,7 @@ public sealed class ModuleManager : IModuleManager
                     var handler = CreateHandler(type, method, instances);
                     if (!_dispatchTable.TryAdd(exportInfo.Value.Nid, handler))
                     {
+                        Console.Error.WriteLine($"[HLE] Duplicate NID '{exportInfo.Value.Nid}' ({exportInfo.Value.ExportName}) — already registered, skipping.");
                         continue;
                     }
 
@@ -93,22 +94,33 @@ public sealed class ModuleManager : IModuleManager
     }
 
     public OrbisGen2Result Dispatch(string nid, CpuContext context)
+    {
+        TryDispatch(nid, context, out var result);
+        return result;
+    }
+
+    public bool TryDispatch(string nid, CpuContext context, out OrbisGen2Result result)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(nid);
         ArgumentNullException.ThrowIfNull(context);
 
         if (!_dispatchTable.TryGetValue(nid, out var function) || !_exportTable.TryGetValue(nid, out var export))
         {
+            Console.Error.WriteLine($"[HLE] NID '{nid}' not found in dispatch table.");
             context[CpuRegister.Rax] = unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
-            return OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            result = OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            return false;
         }
 
         if ((export.Target & context.TargetGeneration) == 0)
         {
-            context[CpuRegister.Rax] = unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
-            return OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            Console.Error.WriteLine($"[HLE] NID '{nid}' ({export.Name}) found but not implemented for generation {context.TargetGeneration} (targets: {export.Target}).");
+            context[CpuRegister.Rax] = unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_IMPLEMENTED);
+            result = OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_IMPLEMENTED;
+            return false;
         }
 
+
         context.ClearRaxWriteFlag();
         int ret = ((SysAbiFunction)function).Invoke(context);
 
@@ -117,7 +129,8 @@ public sealed class ModuleManager : IModuleManager
             context[CpuRegister.Rax] = unchecked((ulong)ret);
         }
 
-        return (OrbisGen2Result)ret;
+        result = (OrbisGen2Result)ret;
+        return true;
     }
 
     private static Delegate CreateHandler(Type ownerType, MethodInfo method, IDictionary<Type, object> instances)

src/SharpEmu.HLE/OrbisGen2Result.cs

@@ -15,6 +15,11 @@ public enum OrbisGen2Result : int
     /// </summary>
     ORBIS_GEN2_OK = 0,
 
+    /// <summary>
+    /// Indicates that the operation is not permitted for the calling thread.
+    /// </summary>
+    ORBIS_GEN2_ERROR_PERMISSION_DENIED = unchecked((int)0x80020001),
+
     /// <summary>
     /// Indicates that the requested export was not found.
     /// </summary>
@@ -30,11 +35,31 @@ public enum OrbisGen2Result : int
     /// </summary>
     ORBIS_GEN2_ERROR_ALREADY_EXISTS = unchecked((int)0x80020004),
 
+    /// <summary>
+    /// Indicates that completing the operation would deadlock.
+    /// </summary>
+    ORBIS_GEN2_ERROR_DEADLOCK = unchecked((int)0x8002000B),
+
+    /// <summary>
+    /// Indicates that the target resource is busy.
+    /// </summary>
+    ORBIS_GEN2_ERROR_BUSY = unchecked((int)0x80020010),
+
+    /// <summary>
+    /// Indicates that the operation should be retried later.
+    /// </summary>
+    ORBIS_GEN2_ERROR_TRY_AGAIN = unchecked((int)0x80020023),
+
     /// <summary>
     /// Indicates that behavior is recognized but not implemented yet.
     /// </summary>
     ORBIS_GEN2_ERROR_NOT_IMPLEMENTED = unchecked((int)0x8002FFFF),
 
+    /// <summary>
+    /// Indicates that the operation timed out.
+    /// </summary>
+    ORBIS_GEN2_ERROR_TIMED_OUT = unchecked((int)0x8002003C),
+
     /// <summary>
     /// Indicates that memory access failed.
     /// </summary>

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 +1,124 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+
+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 (!ctx.TryReadUInt16(userDataAddress + 0x28, out var extendedUserDataSize) ||
+            !ctx.TryReadUInt16(userDataAddress + 0x2A, out var shaderResourceTableSize) ||
+            !ctx.TryReadUInt16(userDataAddress + 0x2C, out var directResourceCount) ||
+            directResourceCount > MaxMetadataEntries)
+        {
+            return false;
+        }
+
+        var resourceCounts = new ushort[ResourceClassCount];
+        for (var resourceClass = 0; resourceClass < ResourceClassCount; resourceClass++)
+        {
+            if (!ctx.TryReadUInt16(
+                    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 (!ctx.TryReadUInt16(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 (!ctx.TryReadUInt16(
+                        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;
+    }
+}

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 +47,159 @@ 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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        int value;
+        if (paramId == AppParamSkuFlag)
+        {
+            value = AppParamSkuFlagFull;
+        }
+        else if (!TryReadUserDefinedParam(paramId, out value))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> valueBytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(valueBytes, value);
+        if (!ctx.Memory.TryWrite(valueAddress, valueBytes))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceAppContent($"app_param_get_int id={paramId} value={value}");
+        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "buYbeLOGWmA",
+        ExportName = "sceAppContentTemporaryDataMount2",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAppContent")]
+    public static int AppContentTemporaryDataMount2(CpuContext ctx)
+    {
+        var mountPointAddress = ctx[CpuRegister.Rsi];
+        if (mountPointAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        Directory.CreateDirectory(ResolveTemp0Root());
+        var mountPointBytes = Encoding.ASCII.GetBytes($"{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 = $"userDefinedParam{paramId}";
+            if (document.RootElement.TryGetProperty(propertyName, out var element) &&
+                element.TryGetInt32(out var parsedValue))
+            {
+                value = parsedValue;
+            }
+
+            return true;
+        }
+        catch (IOException)
+        {
+            return true;
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return true;
+        }
+        catch (JsonException)
+        {
+            return true;
+        }
+    }
+
+    private static void TraceAppContent(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_APP_CONTENT"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[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 +1,217 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+
+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 ctx.SetReturn((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)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((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 ctx.SetReturn((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)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((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 ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = (ulong)Interlocked.Increment(ref _nextContextHandle);
+        return ctx.TryWriteUInt64(outContextAddress, handle)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "on6ZH7Abo10",
+        ExportName = "sceAudioOut2ContextDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextDestroy(CpuContext ctx) => ctx.SetReturn(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 ctx.SetReturn((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)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((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 ctx.SetReturn((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)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((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 ctx.SetReturn((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)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((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) => ctx.SetReturn(0);
+
+    [SysAbiExport(
+        Nid = "IaZXJ9M79uo",
+        ExportName = "sceAudioOut2UserDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2UserDestroy(CpuContext ctx) => ctx.SetReturn(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 ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = (ulong)Interlocked.Increment(ref _nextUserHandle);
+        return ctx.TryWriteUInt64(outUserAddress, handle)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+}

src/SharpEmu.Libs/Audio/AudioOutExports.cs

@@ -0,0 +1,234 @@
+// 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;
+
+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) => ctx.SetReturn(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 ctx.SetReturn((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 ctx.SetReturn(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 ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        port.Dispose();
+        return ctx.SetReturn(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 ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (sourceAddress == 0)
+        {
+            return ctx.SetReturn(0);
+        }
+
+        var buffer = ArrayPool<byte>.Shared.Rent(port.BufferByteLength);
+        try
+        {
+            var source = buffer.AsSpan(0, port.BufferByteLength);
+            if (!ctx.Memory.TryRead(sourceAddress, source))
+            {
+                return ctx.SetReturn((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 ctx.SetReturn(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 ctx.SetReturn(
+            Ports.ContainsKey(handle)
+                ? 0
+                : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+    }
+
+    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 +1,68 @@
+// 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 ctx.SetReturn(
+                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 ctx.SetReturn(Players.Remove(ctx[CpuRegister.Rdi]) ? 0 : InvalidParameters);
+        }
+    }
+}

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/CxxAbiExports.cs

@@ -10,9 +10,14 @@ namespace SharpEmu.Libs.CxxAbi;
 
 public static class CxaGuardExports
 {
+    private const ulong GuardCompleteValue = 0x0000_0000_0000_0001;
+    private const ulong GuardPendingValue = 0x0000_0000_0000_0100;
+    private const ulong GuardStateMask = 0x0000_0000_0000_FFFF;
+
     private sealed class GuardState
     {
         public int OwnerThreadId { get; set; }
+        public int RecursionDepth { get; set; }
     }
 
     private static readonly ConcurrentDictionary<ulong, GuardState> _inProgress = new();
@@ -35,13 +40,13 @@ public static class CxaGuardExports
         var spinner = new SpinWait();
         while (true)
         {
-            if (!TryReadGuardInitialized(ctx, guardPtr, out var initialized))
+            if (!TryReadGuardState(ctx, guardPtr, out _, out var initialized, out var inProgress))
             {
                 ctx[CpuRegister.Rax] = 0;
                 return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
             }
 
-            LogGuardState(ctx, "guard_acquire", guardPtr, initialized);
+            LogGuardState(ctx, "guard_acquire", guardPtr, initialized, inProgress);
 
             if (initialized)
             {
@@ -53,9 +58,17 @@ public static class CxaGuardExports
             var newState = new GuardState
             {
                 OwnerThreadId = currentThreadId,
+                RecursionDepth = 1,
             };
             if (_inProgress.TryAdd(guardPtr, newState))
             {
+                if (!TryWriteGuardState(ctx, guardPtr, GuardPendingValue))
+                {
+                    _inProgress.TryRemove(guardPtr, out _);
+                    ctx[CpuRegister.Rax] = 0;
+                    return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+                }
+
                 ctx[CpuRegister.Rax] = 1;
                 LogGuardResult("guard_acquire", guardPtr, result: 1, initialized, inProgress: true, ownerThreadId: currentThreadId);
                 return (int)OrbisGen2Result.ORBIS_GEN2_OK;
@@ -101,14 +114,28 @@ public static class CxaGuardExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        if (!TryWriteGuardInitialized(ctx, guardPtr, initialized: true))
+        if (state is not null)
+        {
+            lock (state)
+            {
+                if (state.RecursionDepth > 1)
+                {
+                    state.RecursionDepth--;
+                    ctx[CpuRegister.Rax] = 0;
+                    LogGuardResult("guard_release", guardPtr, result: 0, initialized: false, inProgress: true, ownerThreadId: state.OwnerThreadId);
+                    return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+                }
+            }
+        }
+
+        if (!TryWriteGuardState(ctx, guardPtr, GuardCompleteValue))
         {
             ctx[CpuRegister.Rax] = 0;
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
         _inProgress.TryRemove(guardPtr, out _);
-        LogGuardState(ctx, "guard_release", guardPtr, initialized: true);
+        LogGuardState(ctx, "guard_release", guardPtr, initialized: true, inProgress: false);
 
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
@@ -136,60 +163,50 @@ public static class CxaGuardExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        _ = TryWriteGuardInitialized(ctx, guardPtr, initialized: false);
+        _ = TryWriteGuardState(ctx, guardPtr, 0);
         _inProgress.TryRemove(guardPtr, out _);
-        LogGuardState(ctx, "guard_abort", guardPtr, initialized: false);
+        LogGuardState(ctx, "guard_abort", guardPtr, initialized: false, inProgress: false);
 
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
-    private static bool TryReadGuardInitialized(CpuContext ctx, ulong guardPtr, out bool initialized)
+    private static bool TryReadGuardState(CpuContext ctx, ulong guardPtr, out ulong word, out bool initialized, out bool inProgress)
     {
+        word = 0;
         initialized = false;
-
-        var aligned = guardPtr & ~7UL;
-        var shift = (int)((guardPtr & 7UL) * 8);
-
-        if (!ctx.TryReadUInt64(aligned, out var word))
+        inProgress = false;
+        if (!ctx.TryReadUInt64(guardPtr, out word))
         {
             return false;
         }
 
-        var b0 = (byte)((word >> shift) & 0xFF);
-        initialized = (b0 & 0x01) != 0;
+        initialized = (word & GuardCompleteValue) != 0;
+        inProgress = (word & 0x0000_0000_0000_FF00) != 0;
         return true;
     }
 
-    private static bool TryWriteGuardInitialized(CpuContext ctx, ulong guardPtr, bool initialized)
+    private static bool TryWriteGuardState(CpuContext ctx, ulong guardPtr, ulong stateValue)
     {
-        var aligned = guardPtr & ~7UL;
-        var shift = (int)((guardPtr & 7UL) * 8);
-        var mask = 0xFFUL << shift;
-
-        if (!ctx.TryReadUInt64(aligned, out var word))
+        if (!ctx.TryReadUInt64(guardPtr, out var word))
         {
             return false;
         }
 
-        var b0 = (byte)((word >> shift) & 0xFF);
-        b0 = initialized ? (byte)(b0 | 0x01) : (byte)(b0 & ~0x01);
-
-        var newWord = (word & ~mask) | ((ulong)b0 << shift);
-        return ctx.TryWriteUInt64(aligned, newWord);
+        var newWord = (word & ~GuardStateMask) | (stateValue & GuardStateMask);
+        return ctx.TryWriteUInt64(guardPtr, newWord);
     }
 
-    private static void LogGuardState(CpuContext ctx, string op, ulong guardPtr, bool initialized)
+    private static void LogGuardState(CpuContext ctx, string op, ulong guardPtr, bool initialized, bool inProgress)
     {
         if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_GUARDS"), "1", StringComparison.Ordinal))
         {
             return;
         }
 
-        var aligned = guardPtr & ~7UL;
-        var readable = ctx.TryReadUInt64(aligned, out var word);
+        var readable = ctx.TryReadUInt64(guardPtr, out var word);
         Console.Error.WriteLine(
-            $"[LOADER][TRACE] {op}: guard=0x{guardPtr:X16} aligned=0x{aligned:X16} init={initialized} word={(readable ? $"0x{word:X16}" : "<unreadable>")}");
+            $"[LOADER][TRACE] {op}: guard=0x{guardPtr:X16} init={initialized} in_progress={inProgress} word={(readable ? $"0x{word:X16}" : "<unreadable>")}");
     }
 
     private static void LogGuardResult(string op, ulong guardPtr, int result, bool initialized, bool inProgress, int ownerThreadId)

src/SharpEmu.Libs/Fiber/FiberExports.cs

@@ -0,0 +1,958 @@
+// 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 ctx.SetReturn(FiberErrorNull);
+        }
+
+        if ((optParam & 7) != 0)
+        {
+            return ctx.SetReturn(FiberErrorAlignment);
+        }
+
+        return ctx.TryWriteUInt32(optParam, FiberOptSignature)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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 ctx.SetReturn(error);
+        }
+
+        if (!ctx.TryReadUInt32(fiber + FiberStateOffset, out var state))
+        {
+            return ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        if (state != FiberStateIdle)
+        {
+            return ctx.SetReturn(FiberErrorState);
+        }
+
+        _continuations.TryRemove(fiber, out _);
+        _returnTargets.TryRemove(fiber, out _);
+        _stackRanges.TryRemove(fiber, out _);
+        _ = ctx.TryWriteUInt32(fiber + FiberStateOffset, FiberStateTerminated);
+        return ctx.SetReturn(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 ctx.SetReturn(FiberErrorPermission);
+        }
+
+        if (GuestThreadExecution.Scheduler is not { SupportsGuestContextTransfer: true } ||
+            !GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
+        {
+            return ctx.SetReturn(FiberErrorPermission);
+        }
+
+        var returnArgument = ctx[CpuRegister.Rdi];
+        var argOnRunAddress = ctx[CpuRegister.Rsi];
+        if (argOnRunAddress != 0 && !ctx.TryWriteUInt64(argOnRunAddress, 0))
+        {
+            return ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(FiberErrorState);
+                }
+
+                transferTarget = previousContinuation.Context with { Rax = 0 };
+            }
+            else
+            {
+                if (!returnTarget.ThreadContinuation.HasValue ||
+                    !TryWriteResumeArgument(ctx, returnTarget.ThreadContinuation.Value, returnArgument))
+                {
+                    _continuations.TryRemove(fiberAddress, out _);
+                    return ctx.SetReturn(FiberErrorState);
+                }
+
+                transferTarget = returnTarget.ThreadContinuation.Value.Context with { Rax = 0 };
+            }
+
+            if (!ctx.TryWriteUInt32(fiberAddress + FiberStateOffset, FiberStateIdle))
+            {
+                return ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(FiberErrorNull);
+        }
+
+        var fiberAddress = ResolveCurrentFiberAddress(ctx);
+        if (fiberAddress == 0)
+        {
+            return ctx.SetReturn(FiberErrorPermission);
+        }
+
+        return ctx.TryWriteUInt64(outAddress, fiberAddress)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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 ctx.SetReturn(FiberErrorNull);
+        }
+
+        if (!TryValidateFiber(ctx, fiber, out var error))
+        {
+            return ctx.SetReturn(error);
+        }
+
+        if (!ctx.TryReadUInt64(info, out var size) || size != FiberInfoSize)
+        {
+            return ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        if (!TryReadFiberFields(ctx, fiber, out var fields))
+        {
+            return ctx.SetReturn(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 ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        return ctx.SetReturn(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 ctx.SetReturn(error);
+        }
+
+        if (nameAddress == 0)
+        {
+            return ctx.SetReturn(FiberErrorNull);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxNameLength + 1, out var name))
+        {
+            return ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        return TryWriteName(ctx, fiber + FiberNameOffset, name)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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 ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        return Interlocked.Exchange(ref _contextSizeCheck, 1) == 0
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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 ctx.SetReturn(FiberErrorNull);
+        }
+
+        if (ResolveCurrentFiberAddress(ctx) == 0)
+        {
+            return ctx.SetReturn(FiberErrorPermission);
+        }
+
+        return ctx.TryWriteUInt64(outAddress, ctx[CpuRegister.Rbp])
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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 ctx.SetReturn(FiberErrorNull);
+        }
+
+        if ((fiber & 7) != 0 ||
+            (contextAddress & 15) != 0 ||
+            (optParam & 7) != 0)
+        {
+            return ctx.SetReturn(FiberErrorAlignment);
+        }
+
+        if (contextSize != 0 && contextSize < FiberContextMinimumSize)
+        {
+            return ctx.SetReturn(FiberErrorRange);
+        }
+
+        if ((contextSize & 15) != 0 ||
+            (contextAddress == 0 && contextSize != 0) ||
+            (contextAddress != 0 && contextSize == 0))
+        {
+            return ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        if (optParam != 0 &&
+            (!ctx.TryReadUInt32(optParam, out var optMagic) || optMagic != FiberOptSignature))
+        {
+            return ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxNameLength + 1, out var name))
+        {
+            return ctx.SetReturn(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 ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        if (contextAddress != 0)
+        {
+            if (!ctx.TryWriteUInt64(contextAddress, FiberStackSignature))
+            {
+                return ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(error);
+        }
+
+        if (!TryReadFiberFields(ctx, fiber, out var fields))
+        {
+            return ctx.SetReturn(FiberErrorInvalid);
+        }
+
+        if (attachContextAddress != 0 || attachContextSize != 0)
+        {
+            var attachResult = AttachContext(ctx, fiber, attachContextAddress, attachContextSize, ref fields);
+            if (attachResult != 0)
+            {
+                return ctx.SetReturn(attachResult);
+            }
+        }
+
+        var previousFiber = ResolveCurrentFiberAddress(ctx);
+        if ((isSwitch && previousFiber == 0) ||
+            (!isSwitch && previousFiber != 0))
+        {
+            return ctx.SetReturn(FiberErrorPermission);
+        }
+        if (previousFiber == fiber)
+        {
+            return ctx.SetReturn(FiberErrorState);
+        }
+        if (GuestThreadExecution.Scheduler is not { SupportsGuestContextTransfer: true } ||
+            !GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
+        {
+            return ctx.SetReturn(FiberErrorPermission);
+        }
+
+        GuestCpuContinuation transferTarget;
+        var resumed = false;
+        lock (_fiberGate)
+        {
+            if (!TryReadFiberFields(ctx, fiber, out fields))
+            {
+                return ctx.SetReturn(FiberErrorInvalid);
+            }
+            if (fields.State != FiberStateIdle)
+            {
+                TraceFiber($"run-state-error reason={reason} fiber=0x{fiber:X16} state=0x{fields.State:X8}");
+                return ctx.SetReturn(FiberErrorState);
+            }
+
+            FiberContinuation targetContinuation;
+            if (_continuations.TryGetValue(fiber, out var savedContinuation))
+            {
+                targetContinuation = savedContinuation;
+                resumed = true;
+            }
+            else if (!TryCreateInitialContinuation(ctx, fields, argOnRun, out targetContinuation))
+            {
+                return ctx.SetReturn(FiberErrorInvalid);
+            }
+
+            if (resumed && !TryWriteResumeArgument(ctx, targetContinuation, argOnRun))
+            {
+                return ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(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 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 +1,559 @@
+// 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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxEventFlagNameLength + 1, out var name))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        if (Encoding.UTF8.GetByteCount(name) > MaxEventFlagNameLength)
+        {
+            return ctx.SetReturn(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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceEventFlag($"create handle=0x{handle:X16} name='{name}' attr=0x{attributes:X2} bits=0x{initialPattern:X16}");
+        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "8mql9OcQnd4",
+        ExportName = "sceKernelDeleteEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        if (!_eventFlags.TryRemove(handle, out var state))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            Monitor.PulseAll(state.Gate);
+        }
+
+        TraceEventFlag($"delete handle=0x{handle:X16} name='{state.Name}'");
+        return ctx.SetReturn(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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            state.Bits |= pattern;
+            Monitor.PulseAll(state.Gate);
+            TraceEventFlag($"set handle=0x{handle:X16} pattern=0x{pattern:X16} bits=0x{state.Bits:X16} ret=0x{returnRip:X16}");
+        }
+
+        _ = GuestThreadExecution.Scheduler?.WakeBlockedThreads(GetEventFlagWakeKey(handle));
+        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "7uhBFWRAS60",
+        ExportName = "sceKernelClearEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelClearEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var pattern = ctx[CpuRegister.Rsi];
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            state.Bits &= pattern;
+            TraceEventFlag($"clear handle=0x{handle:X16} mask=0x{pattern:X16} bits=0x{state.Bits:X16}");
+        }
+
+        return ctx.SetReturn(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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (pattern == 0 || !IsValidWaitMode(waitMode))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (state.Gate)
+        {
+            if (!TryWriteResultPattern(ctx, resultAddress, state.Bits))
+            {
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            if (!IsSatisfied(state.Bits, pattern, waitMode))
+            {
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY);
+            }
+
+            ApplyClearMode(state, pattern, waitMode);
+            TraceEventFlag($"poll handle=0x{handle:X16} pattern=0x{pattern:X16} mode=0x{waitMode:X2} bits=0x{state.Bits:X16}");
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "JTvBflhYazQ",
+        ExportName = "sceKernelWaitEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelWaitEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var pattern = ctx[CpuRegister.Rsi];
+        var waitMode = unchecked((uint)ctx[CpuRegister.Rdx]);
+        var resultAddress = ctx[CpuRegister.Rcx];
+        var timeoutAddress = ctx[CpuRegister.R8];
+        var returnRip = GetCurrentReturnRip();
+
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (pattern == 0 || !IsValidWaitMode(waitMode))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        uint timeoutUsec = 0;
+        if (timeoutAddress != 0 && !ctx.TryReadUInt32(timeoutAddress, out timeoutUsec))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        Monitor.Enter(state.Gate);
+        try
+        {
+            if (TryCompleteSatisfiedWait(ctx, state, pattern, waitMode, resultAddress, out var immediateWaitResult))
+            {
+                return ctx.SetReturn(immediateWaitResult);
+            }
+
+            if (timeoutAddress != 0)
+            {
+                _ = ctx.TryWriteUInt32(timeoutAddress, 0);
+                _ = TryWriteResultPattern(ctx, resultAddress, state.Bits);
+                TraceEventFlag($"wait-timeout handle=0x{handle:X16} pattern=0x{pattern:X16} timeout={timeoutUsec} ret=0x{returnRip:X16}");
+                return ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(pumpedWaitResult);
+                        }
+
+                        Monitor.Wait(state.Gate, HostWaitPumpMilliseconds);
+                    }
+                }
+                finally
+                {
+                    if (releaseWaiter)
+                    {
+                        state.WaitingThreads = Math.Max(0, state.WaitingThreads - 1);
+                    }
+                }
+            }
+
+            state.WaitingThreads++;
+            TraceEventFlag($"wait-block handle=0x{handle:X16} pattern=0x{pattern:X16} waiters={state.WaitingThreads} guest_thread=0x{currentGuestThread:X16} fiber=0x{currentFiber:X16} managed={managedThread} ret=0x{returnRip:X16}");
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+        finally
+        {
+            Monitor.Exit(state.Gate);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "PZku4ZrXJqg",
+        ExportName = "sceKernelCancelEventFlag",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelCancelEventFlag(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var setPattern = ctx[CpuRegister.Rsi];
+        var waiterCountAddress = ctx[CpuRegister.Rdx];
+        if (!_eventFlags.TryGetValue(handle, out var state))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        lock (state.Gate)
+        {
+            if (waiterCountAddress != 0 &&
+                !ctx.TryWriteUInt32(waiterCountAddress, unchecked((uint)state.WaitingThreads)))
+            {
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            state.Bits = setPattern;
+            state.WaitingThreads = 0;
+            Monitor.PulseAll(state.Gate);
+            TraceEventFlag($"cancel handle=0x{handle:X16} bits=0x{setPattern:X16}");
+        }
+
+        return ctx.SetReturn(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) =>
+        $"event_flag:0x{handle:X16}";
+
+    private static bool TryWriteResultPattern(CpuContext ctx, ulong address, ulong bits) =>
+        address == 0 || ctx.TryWriteUInt64(address, bits);
+
+    private static void TraceEventFlag(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_EVENT_FLAG"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[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

@@ -8,10 +8,11 @@ namespace SharpEmu.Libs.Kernel;
 
 public static class KernelExports
 {
-    private static long _nextThreadId = 1;
-    private static int _nextFileDescriptor = 2;
     private static readonly object _cxaGate = new();
     private static readonly List<CxaDestructorEntry> _cxaDestructors = new();
+    private static readonly object _coredumpGate = new();
+    private static ulong _coredumpHandler;
+    private static ulong _coredumpHandlerContext;
 
     private readonly record struct CxaDestructorEntry(
         ulong Function,
@@ -29,6 +30,23 @@ public static class KernelExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "8zLSfEfW5AU",
+        ExportName = "sceCoredumpRegisterCoredumpHandler",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceCoredump")]
+    public static int CoredumpRegisterHandler(CpuContext ctx)
+    {
+        lock (_coredumpGate)
+        {
+            _coredumpHandler = ctx[CpuRegister.Rdi];
+            _coredumpHandlerContext = ctx[CpuRegister.Rsi];
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "uMei1W9uyNo",
         ExportName = "exit",
@@ -36,7 +54,10 @@ 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;
     }
 
@@ -49,7 +70,8 @@ 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;
     }
 
@@ -175,12 +197,56 @@ public static class KernelExports
     public static int PthreadCreate(CpuContext ctx)
     {
         var threadIdAddress = ctx[CpuRegister.Rdi];
-        var nextThreadId = unchecked((ulong)Interlocked.Increment(ref _nextThreadId));
-        if (threadIdAddress != 0 && !ctx.TryWriteUInt64(threadIdAddress, nextThreadId))
+        var attrAddress = ctx[CpuRegister.Rsi];
+        var entryAddress = ctx[CpuRegister.Rdx];
+        var argument = ctx[CpuRegister.Rcx];
+        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;
         }
 
+        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}' 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;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -194,6 +260,42 @@ 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",
@@ -201,12 +303,40 @@ public static class KernelExports
         LibraryName = "libKernel")]
     public static int PthreadJoin(CpuContext ctx)
     {
+        var threadId = ctx[CpuRegister.Rdi];
         var returnValueAddress = ctx[CpuRegister.Rsi];
-        if (returnValueAddress != 0 && !ctx.TryWriteUInt64(returnValueAddress, 0))
+
+        if (ShouldTracePthread())
         {
+            Console.Error.WriteLine(
+                $"[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;
     }
 
@@ -225,22 +355,21 @@ 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",
@@ -251,84 +380,17 @@ 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;
     }
 
@@ -370,4 +432,9 @@ public static class KernelExports
         try { return System.Text.Encoding.UTF8.GetString(buf.Slice(0, len)); }
         catch { return System.Text.Encoding.ASCII.GetString(buf.Slice(0, len)); }
     }
+
+    private static bool ShouldTracePthread()
+    {
+        return string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PTHREADS"), "1", StringComparison.Ordinal);
+    }
 }

src/SharpEmu.Libs/Kernel/KernelPthreadState.cs

@@ -0,0 +1,85 @@
+// 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;
+
+internal static class KernelPthreadState
+{
+    private const int ThreadObjectSize = 0x1000;
+
+    private static readonly ConcurrentDictionary<ulong, ThreadIdentity> Threads = new();
+    private static readonly byte[] ZeroThreadObject = new byte[ThreadObjectSize];
+    private static long _nextUniqueThreadId = 1;
+
+    [ThreadStatic]
+    private static ulong _currentThreadHandle;
+
+    [ThreadStatic]
+    private static ulong _currentThreadUniqueId;
+
+    internal readonly record struct ThreadIdentity(ulong UniqueId, string Name);
+
+    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;
+    }
+
+    internal static ulong CreateThreadHandle(string name)
+    {
+        var uniqueId = unchecked((ulong)Interlocked.Increment(ref _nextUniqueThreadId));
+        return AllocateThreadHandle(uniqueId, name);
+    }
+
+    internal static bool TryGetThreadIdentity(ulong threadHandle, out ThreadIdentity identity)
+    {
+        return Threads.TryGetValue(threadHandle, out identity);
+    }
+
+    private static void EnsureCurrentThreadRegistered()
+    {
+        if (_currentThreadHandle != 0)
+        {
+            return;
+        }
+
+        var uniqueId = unchecked((ulong)Interlocked.Increment(ref _nextUniqueThreadId));
+        var name = $"Thread-{uniqueId:X}";
+        _currentThreadHandle = AllocateThreadHandle(uniqueId, name);
+        _currentThreadUniqueId = uniqueId;
+    }
+
+    private static ulong AllocateThreadHandle(ulong uniqueId, string name)
+    {
+        var pointer = Marshal.AllocHGlobal(ThreadObjectSize);
+        Marshal.Copy(ZeroThreadObject, 0, pointer, ThreadObjectSize);
+
+        var handle = unchecked((ulong)pointer.ToInt64());
+        Threads[handle] = new ThreadIdentity(uniqueId, string.IsNullOrWhiteSpace(name) ? $"Thread-{uniqueId:X}" : name);
+
+        return handle;
+    }
+}

src/SharpEmu.Libs/Kernel/KernelRuntimeCompatExports.cs

@@ -2,16 +2,13 @@
 // 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;
 using System.Text;
-using System.Threading;
 
 namespace SharpEmu.Libs.Kernel;
 
@@ -25,12 +22,16 @@ 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;
@@ -39,7 +40,10 @@ public static class KernelRuntimeCompatExports
     private static readonly RdtscDelegate? _rdtscReader = CreateRdtscReader();
     private static readonly ulong _kernelTscFrequency = ResolveKernelTscFrequency();
     private static readonly ulong _stackChkGuardValue = 0xC0DEC0DECAFEBABEUL;
-    private static readonly nint _stackChkGuardObjectAddress = AllocateStackChkGuardObject();
+    private static readonly nint _stackChkGuardObjectAddress =
+        HleDataSymbols.TryGetAddress("f7uOxY9mM1U", out var stackChkGuardAddress)
+            ? unchecked((nint)stackChkGuardAddress)
+            : AllocateStackChkGuardObject();
     private static ulong _applicationHeapApiAddress;
     private static ulong _processProcParamAddress;
     private static ulong _nextReservedVirtualBase = 0x6000_0000_0UL;
@@ -48,6 +52,14 @@ 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();
@@ -60,33 +72,104 @@ 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",
@@ -152,6 +235,37 @@ 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 &&
+            (!ctx.TryWriteInt32(timezoneAddress, 0) ||
+             !ctx.TryWriteInt32(timezoneAddress + sizeof(int), 0)))
+        {
+            return -1;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return 0;
+    }
+
     [SysAbiExport(
         Nid = "-2IRUCO--PM",
         ExportName = "sceKernelReadTsc",
@@ -254,6 +368,8 @@ public static class KernelRuntimeCompatExports
             }
         }
 
+        TraceProcParam(ctx, address);
+
         ctx[CpuRegister.Rax] = address;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -266,6 +382,223 @@ 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",
@@ -274,19 +607,16 @@ 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 && ctx.TryWriteInt32(address, value);
+    }
+
     [SysAbiExport(
         Nid = "bnZxYgAFeA0",
         ExportName = "sceKernelGetSanitizerNewReplaceExternal",
@@ -329,6 +659,17 @@ 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",
@@ -367,7 +708,7 @@ 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)
         {
@@ -379,7 +720,8 @@ 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)
         {
@@ -388,13 +730,16 @@ 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))
         {
@@ -406,6 +751,7 @@ public static class KernelRuntimeCompatExports
             _nextReservedVirtualBase = Math.Max(_nextReservedVirtualBase, mappedAddress + length);
         }
 
+        KernelMemoryCompatExports.RegisterReservedVirtualRange(mappedAddress, length);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -478,7 +824,7 @@ public static class KernelRuntimeCompatExports
         }
 
         var moduleHandle = ResolveModuleHandleByAddress(queriedAddress);
-        if (!TryWriteInt32(ctx, outInfoAddress + ModuleInfoHandleOffset, moduleHandle))
+        if (!ctx.TryWriteInt32(outInfoAddress + ModuleInfoHandleOffset, moduleHandle))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -508,7 +854,7 @@ public static class KernelRuntimeCompatExports
         }
 
         var moduleHandle = ResolveModuleHandleByAddress(queriedAddress);
-        if (!TryWriteInt32(ctx, outInfoAddress + ModuleInfoHandleOffset, moduleHandle))
+        if (!ctx.TryWriteInt32(outInfoAddress + ModuleInfoHandleOffset, moduleHandle))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -678,14 +1024,12 @@ 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(
@@ -711,7 +1055,7 @@ public static class KernelRuntimeCompatExports
     public static int KernelStopUnloadModule(CpuContext ctx)
     {
         var resultAddress = ctx[CpuRegister.R9];
-        if (resultAddress != 0 && !TryWriteInt32(ctx, resultAddress, 0))
+        if (resultAddress != 0 && !ctx.TryWriteInt32(resultAddress, 0))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -729,7 +1073,7 @@ public static class KernelRuntimeCompatExports
     {
         var modulePathAddress = ctx[CpuRegister.Rdi];
         var resultAddress = ctx[CpuRegister.R9];
-        if (resultAddress != 0 && !TryWriteInt32(ctx, resultAddress, 0))
+        if (resultAddress != 0 && !ctx.TryWriteInt32(resultAddress, 0))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -777,6 +1121,153 @@ 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 (!ctx.TryWriteInt32(timezoneAddress, minutesWest) ||
+            !ctx.TryWriteInt32(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 && !ctx.TryWriteInt32(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",
@@ -810,7 +1301,7 @@ public static class KernelRuntimeCompatExports
             _loadedSysmodules.Add(moduleId);
         }
 
-        if (resultAddress != 0 && !TryWriteInt32(ctx, resultAddress, 0))
+        if (resultAddress != 0 && !ctx.TryWriteInt32(resultAddress, 0))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -900,7 +1391,7 @@ public static class KernelRuntimeCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
-        if (!TryWriteInt32(ctx, outInfoAddress + ModuleInfoHandleOffset, module.Handle))
+        if (!ctx.TryWriteInt32(outInfoAddress + ModuleInfoHandleOffset, module.Handle))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -937,7 +1428,7 @@ public static class KernelRuntimeCompatExports
         var writableCount = (int)Math.Min(Math.Min(capacity, (ulong)int.MaxValue), (ulong)handles.Length);
         for (var i = 0; i < writableCount; i++)
         {
-            if (!TryWriteInt32(ctx, handlesAddress + (ulong)(i * sizeof(int)), handles[i]))
+            if (!ctx.TryWriteInt32(handlesAddress + (ulong)(i * sizeof(int)), handles[i]))
             {
                 return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
             }
@@ -1010,13 +1501,6 @@ public static class KernelRuntimeCompatExports
         return unchecked(ctx.FsBase + offset);
     }
 
-    private static bool TryWriteInt32(CpuContext ctx, ulong address, int value)
-    {
-        Span<byte> bytes = stackalloc byte[sizeof(int)];
-        BinaryPrimitives.WriteInt32LittleEndian(bytes, value);
-        return ctx.Memory.TryWrite(address, bytes);
-    }
-
     private static nint AllocateStackChkGuardObject()
     {
         try
@@ -1041,30 +1525,40 @@ 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;
@@ -1223,96 +1717,24 @@ 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)
@@ -1325,4 +1747,9 @@ 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 +1,259 @@
+// 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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (!ctx.TryReadNullTerminatedUtf8(nameAddress, MaxSemaphoreNameLength, out var name))
+        {
+            return ctx.SetReturn(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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceSemaphore($"create handle=0x{handle:X8} name='{name}' attr=0x{attr:X} init={initialCount} max={maxCount}");
+        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "Zxa0VhQVTsk",
+        ExportName = "sceKernelWaitSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelWaitSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var needCount = unchecked((int)ctx[CpuRegister.Rsi]);
+        var timeoutAddress = ctx[CpuRegister.Rdx];
+
+        if (!_semaphores.TryGetValue(handle, out var semaphore))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (needCount < 1 || needCount > semaphore.MaxCount)
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (semaphore.Count >= needCount)
+            {
+                semaphore.Count -= needCount;
+                TraceSemaphore($"wait handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+            }
+
+            if (timeoutAddress != 0)
+            {
+                if (!ctx.TryReadUInt32(timeoutAddress, out _))
+                {
+                    return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+
+                _ = ctx.TryWriteUInt32(timeoutAddress, 0);
+                TraceSemaphore($"wait-timeout handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT);
+            }
+
+            if (!GuestThreadExecution.RequestCurrentThreadBlock(ctx, "sceKernelWaitSema"))
+            {
+                TraceSemaphore($"wait-would-block handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN);
+            }
+
+            semaphore.WaitingThreads++;
+            TraceSemaphore($"wait-block handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count} waiters={semaphore.WaitingThreads}");
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "12wOHk8ywb0",
+        ExportName = "sceKernelPollSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelPollSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var needCount = unchecked((int)ctx[CpuRegister.Rsi]);
+
+        if (!_semaphores.TryGetValue(handle, out var semaphore))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (needCount < 1 || needCount > semaphore.MaxCount)
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (semaphore.Count < needCount)
+            {
+                TraceSemaphore($"poll-busy handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY);
+            }
+
+            semaphore.Count -= needCount;
+            TraceSemaphore($"poll handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "4czppHBiriw",
+        ExportName = "sceKernelSignalSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelSignalSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        var signalCount = unchecked((int)ctx[CpuRegister.Rsi]);
+
+        if (!_semaphores.TryGetValue(handle, out var semaphore))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (signalCount <= 0)
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (semaphore.Count > semaphore.MaxCount - signalCount)
+            {
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+            }
+
+            semaphore.Count += signalCount;
+            TraceSemaphore($"signal handle=0x{handle:X8} name='{semaphore.Name}' signal={signalCount} count={semaphore.Count} waiters={semaphore.WaitingThreads}");
+            return ctx.SetReturn(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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        if (setCount > semaphore.MaxCount)
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        lock (semaphore.Gate)
+        {
+            if (waitingThreadsAddress != 0 && !ctx.TryWriteUInt32(waitingThreadsAddress, unchecked((uint)semaphore.WaitingThreads)))
+            {
+                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            semaphore.Count = setCount < 0 ? semaphore.InitialCount : setCount;
+            semaphore.WaitingThreads = 0;
+            TraceSemaphore($"cancel handle=0x{handle:X8} name='{semaphore.Name}' set={setCount} count={semaphore.Count}");
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "R1Jvn8bSCW8",
+        ExportName = "sceKernelDeleteSema",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int KernelDeleteSema(CpuContext ctx)
+    {
+        var handle = unchecked((uint)ctx[CpuRegister.Rdi]);
+        if (!_semaphores.TryRemove(handle, out var semaphore))
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
+        }
+
+        TraceSemaphore($"delete handle=0x{handle:X8} name='{semaphore.Name}'");
+        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    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/LibcInternalExports.cs

@@ -0,0 +1,78 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Runtime.InteropServices;
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.LibcInternal;
+
+public static class LibcInternalExports
+{
+    private const ulong HeapTraceInfoSize = 32;
+    private const int HeapTraceTableEntryCount = 64;
+    private const int HeapTraceMaskOffset = 0;
+    private const int HeapTraceTableOffset = HeapTraceMaskOffset + sizeof(ulong);
+    private const int HeapTraceStorageSize = HeapTraceTableOffset + (HeapTraceTableEntryCount * sizeof(ulong));
+
+    private static readonly object _heapTraceGate = new();
+    private static nint _heapTraceStorage;
+
+    [SysAbiExport(
+        Nid = "NWtTN10cJzE",
+        ExportName = "LibcHeapGetTraceInfo",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "LibcInternalExt")]
+    public static int LibcHeapGetTraceInfo(CpuContext ctx)
+    {
+        var infoAddress = ctx[CpuRegister.Rdi];
+        if (infoAddress == 0 || !ctx.TryReadUInt64(infoAddress, out var size) || size != HeapTraceInfoSize)
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        var storage = EnsureHeapTraceStorage();
+        if (storage == 0)
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        var maskAddress = unchecked((ulong)(storage + HeapTraceMaskOffset));
+        var tableAddress = unchecked((ulong)(storage + HeapTraceTableOffset));
+        if (!ctx.TryWriteUInt64(infoAddress + 16, maskAddress) ||
+            !ctx.TryWriteUInt64(infoAddress + 24, tableAddress))
+        {
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    private static nint EnsureHeapTraceStorage()
+    {
+        lock (_heapTraceGate)
+        {
+            if (_heapTraceStorage != 0)
+            {
+                return _heapTraceStorage;
+            }
+
+            var storage = Marshal.AllocHGlobal(HeapTraceStorageSize);
+            if (storage == 0)
+            {
+                return 0;
+            }
+
+            unsafe
+            {
+                NativeMemory.Clear((void*)storage, (nuint)HeapTraceStorageSize);
+            }
+
+            _heapTraceStorage = storage;
+            return storage;
+        }
+    }
+}

src/SharpEmu.Libs/Network/Http2Exports.cs

@@ -0,0 +1,71 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Collections.Concurrent;
+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 ctx.SetReturn(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 ctx.SetReturn(Http2ErrorInvalidId);
+        }
+
+        TraceHttp2("term", id, 0, 0, 0, 0);
+        return ctx.SetReturn(0);
+    }
+
+    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 +1,115 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Collections.Concurrent;
+
+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 ctx.SetReturn(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 ctx.SetReturn(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 _)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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 ctx.SetReturn(HttpErrorInvalidId);
+        }
+
+        foreach (var pair in Templates)
+        {
+            if (pair.Value.ContextId == contextId)
+            {
+                Templates.TryRemove(pair.Key, out _);
+            }
+        }
+
+        return ctx.SetReturn(0);
+    }
+
+    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 +1,223 @@
+// 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 ctx.SetReturn(NetCtlErrorInvalidAddress, typeof(long));
+        }
+
+        Span<byte> natInfo = stackalloc byte[NatInfoSize];
+        if (!ctx.Memory.TryRead(natInfoAddress, natInfo))
+        {
+            return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+        }
+
+        var size = BinaryPrimitives.ReadUInt32LittleEndian(natInfo[..sizeof(uint)]);
+        if (size != NatInfoSize)
+        {
+            return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT, typeof(long));
+        }
+
+        BinaryPrimitives.WriteInt32LittleEndian(natInfo[4..], 1);
+        BinaryPrimitives.WriteInt32LittleEndian(natInfo[8..], 3);
+        BinaryPrimitives.WriteUInt32LittleEndian(natInfo[12..], 0x7F000001);
+        return ctx.Memory.TryWrite(natInfoAddress, natInfo)
+            ? ctx.SetReturn(0, typeof(long))
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+    }
+
+    [SysAbiExport(
+        Nid = "iQw3iQPhvUQ",
+        ExportName = "sceNetCtlCheckCallback",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlCheckCallback(CpuContext ctx)
+    {
+        return ctx.SetReturn(0, typeof(long));
+    }
+
+    [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 ctx.SetReturn(NetCtlErrorInvalidAddress, typeof(long));
+        }
+
+        Span<byte> stateBytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(stateBytes, 0);
+        return ctx.Memory.TryWrite(stateAddress, stateBytes)
+            ? ctx.SetReturn(0, typeof(long))
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+    }
+
+    [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 ctx.SetReturn(NetCtlErrorInvalidAddress, typeof(long));
+        }
+
+        lock (CallbackGate)
+        {
+            var callbackId = Array.FindIndex(Callbacks, static callback => callback.Function == 0);
+            if (callbackId < 0)
+            {
+                return ctx.SetReturn(NetCtlErrorNoSpace, typeof(long));
+            }
+
+            Span<byte> callbackIdBytes = stackalloc byte[sizeof(uint)];
+            BinaryPrimitives.WriteUInt32LittleEndian(callbackIdBytes, unchecked((uint)callbackId));
+            if (!ctx.Memory.TryWrite(callbackIdAddress, callbackIdBytes))
+            {
+                return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+            }
+
+            Callbacks[callbackId] = new CallbackRegistration(function, argument);
+        }
+
+        return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_OK, typeof(long));
+    }
+
+    [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 ctx.SetReturn(NetCtlErrorInvalidAddress, typeof(long));
+        }
+
+        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),
+            _ => ctx.SetReturn(NetCtlErrorNotConnected, typeof(long)),
+        };
+    }
+
+    private static int WriteZeroBytes(CpuContext ctx, ulong address, int count)
+    {
+        Span<byte> bytes = stackalloc byte[count];
+        return ctx.Memory.TryWrite(address, bytes)
+            ? ctx.SetReturn(0, typeof(long))
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+    }
+
+    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)
+            ? ctx.SetReturn(0, typeof(long))
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+    }
+
+    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)
+            ? ctx.SetReturn(0, typeof(long))
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+    }
+
+    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)
+            ? ctx.SetReturn(0, typeof(long))
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT, typeof(long));
+    }
+}

src/SharpEmu.Libs/Network/NetExports.cs

@@ -0,0 +1,202 @@
+// 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.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 ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(NetErrorBadFileDescriptor);
+        }
+
+        TraceNet("pool.destroy", id, 0, 0, _initialized ? 1UL : 0UL);
+        return ctx.SetReturn(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 ctx.SetReturn(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 _)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn(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 ctx.SetReturn(NetErrorInvalidArgument);
+        }
+
+        if (!_resolvers.TryGetValue(id, out var resolver))
+        {
+            return ctx.SetReturn(NetErrorBadFileDescriptor);
+        }
+
+        Span<byte> status = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(status, resolver.LastError);
+        return ctx.Memory.TryWrite(statusAddress, status)
+            ? ctx.SetReturn(0)
+            : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    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 +1,79 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Collections.Concurrent;
+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 ctx.SetReturn(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 ctx.SetReturn(SslErrorInvalidId);
+        }
+
+        TraceSsl("term", id, 0);
+        return ctx.SetReturn(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 ctx.SetReturn(0);
+    }
+
+    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 +1,316 @@
+// 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;
+
+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 ctx.SetReturn(OrbisNgs2ErrorInvalidOutAddress);
+        }
+
+        if (!TryCreateHandle(ctx, type: 1, ownerHandle: 0, out var handle) ||
+            !ctx.TryWriteUInt64(outHandleAddress, handle))
+        {
+            return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        lock (StateGate)
+        {
+            Systems[handle] = new SystemState(unchecked((uint)Interlocked.Increment(ref _nextUid)));
+        }
+
+        return ctx.SetReturn(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 ctx.SetReturn(OrbisNgs2ErrorInvalidSystemHandle);
+            }
+
+            var rackHandles = Racks
+                .Where(pair => pair.Value.SystemHandle == handle)
+                .Select(pair => pair.Key)
+                .ToArray();
+            foreach (var rackHandle in rackHandles)
+            {
+                RemoveRackLocked(rackHandle);
+            }
+        }
+
+        return ctx.SetReturn(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 ctx.SetReturn(OrbisNgs2ErrorInvalidSystemHandle);
+            }
+        }
+
+        if (outHandleAddress == 0)
+        {
+            return ctx.SetReturn(OrbisNgs2ErrorInvalidOutAddress);
+        }
+
+        if (!TryCreateHandle(ctx, type: 2, systemHandle, out var handle) ||
+            !ctx.TryWriteUInt64(outHandleAddress, handle))
+        {
+            return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        lock (StateGate)
+        {
+            Racks[handle] = new RackState(systemHandle, rackId);
+        }
+
+        return ctx.SetReturn(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 ctx.SetReturn(OrbisNgs2ErrorInvalidRackHandle);
+            }
+
+            RemoveRackLocked(handle);
+        }
+
+        return ctx.SetReturn(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 ctx.SetReturn(OrbisNgs2ErrorInvalidRackHandle);
+            }
+
+            var existing = Voices.FirstOrDefault(
+                pair => pair.Value.RackHandle == rackHandle && pair.Value.VoiceIndex == voiceIndex);
+            if (existing.Key != 0)
+            {
+                return ctx.TryWriteUInt64(outHandleAddress, existing.Key)
+                    ? ctx.SetReturn(0)
+                    : ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+        }
+
+        if (outHandleAddress == 0)
+        {
+            return ctx.SetReturn(OrbisNgs2ErrorInvalidOutAddress);
+        }
+
+        if (!TryCreateHandle(ctx, type: 4, rackHandle, out var handle) ||
+            !ctx.TryWriteUInt64(outHandleAddress, handle))
+        {
+            return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        lock (StateGate)
+        {
+            Voices[handle] = new VoiceState(rackHandle, voiceIndex);
+        }
+
+        return ctx.SetReturn(0);
+    }
+
+    [SysAbiExport(
+        Nid = "uu94irFOGpA",
+        ExportName = "sceNgs2VoiceControl",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNgs2")]
+    public static int Ngs2VoiceControl(CpuContext ctx)
+    {
+        lock (StateGate)
+        {
+            return ctx.SetReturn(
+                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 ctx.SetReturn(OrbisNgs2ErrorInvalidSystemHandle);
+            }
+        }
+
+        if (bufferInfoCount != 0 && bufferInfoAddress == 0)
+        {
+            return ctx.SetReturn((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 ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            if (bufferAddress != 0 && bufferSize != 0)
+            {
+                if (bufferSize > MaximumRenderBufferSize || !TryClearGuestBuffer(ctx, bufferAddress, bufferSize))
+                {
+                    return ctx.SetReturn((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 ctx.SetReturn(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);
+}

src/SharpEmu.Libs/Np/NpEntitlementAccessExports.cs

@@ -0,0 +1,70 @@
+// 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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+        }
+
+        TraceNpEntitlementAccess($"initialize init=0x{initParam:X16} boot=0x{bootParam:X16}");
+        return ctx.SetReturn(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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+        }
+
+        TraceNpEntitlementAccess(
+            $"get_addcont_info_list service=0x{ctx[CpuRegister.Rdi]:X16} list=0x{listAddress:X16} " +
+            $"max={ctx[CpuRegister.Rdx]} flags=0x{ctx[CpuRegister.Rcx]:X16} -> empty");
+        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static void TraceNpEntitlementAccess(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_NP"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] np.entitlement.{message}");
+    }
+}

src/SharpEmu.Libs/Np/NpManagerExports.cs

@@ -0,0 +1,137 @@
+// 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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> stateBytes = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(stateBytes, 1);
+        return ctx.Memory.TryWrite(stateAddress, stateBytes)
+            ? ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK)
+            : ctx.SetReturn(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 ctx.SetReturn(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 ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceNp($"set_np_title_id title='{ReadTitleId(titleId)}'");
+        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static string ReadTitleId(ReadOnlySpan<byte> bytes)
+    {
+        var length = 0;
+        while (length < 12 && length < bytes.Length && bytes[length] != 0)
+        {
+            length++;
+        }
+
+        return length == 0
+            ? string.Empty
+            : System.Text.Encoding.ASCII.GetString(bytes[..length]);
+    }
+
+    private static void TraceNp(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_NP"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[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;
+    }
+}