[loader] cut import overhead

- Enable VertexPipelineStoresAndAtomics/FragmentStoresAndAtomics:
  fixes vkCreateGraphicsPipelines() rejecting guestBuffers storage
  descriptor as NonWritable in vertex/fragment stages.
- Enable ShaderInt64: fixes vkCreateShaderModule() rejecting SPIR-V
  using 64-bit integer capability.
- Query GetPhysicalDeviceFeatures first and only enable what the GPU
  actually reports as supported, with a warning fallback otherwise.

Also adds optional Vulkan Validation Layers (SHARPEMU_VK_VALIDATION=1)
to surface these VUID errors during development instead of silent
VK_ERROR_DEVICE_LOST.

.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/workflows/workflow.yml

@@ -9,11 +9,17 @@ on:
       - "**"
     paths-ignore:
       - "**/*.md"
+      - "**/*.png"
+      - "**/*.jpeg"
+      - "**/*.jpg"
   pull_request:
     branches:
       - main
     paths-ignore:
       - "**/*.md"
+      - "**/*.png"
+      - "**/*.jpeg"
+      - "**/*.jpg"
   workflow_dispatch:
 
 permissions:
@@ -120,7 +126,7 @@ 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

.gitignore

@@ -26,6 +26,7 @@ arm64/
 *.userosscache
 *.sln.docstates
 
+.packages
 packages/
 *.nupkg
 .nuget/

Directory.Packages.props

@@ -2,7 +2,6 @@
 Copyright (C) 2026 SharpEmu Emulator Project
 SPDX-License-Identifier: GPL-2.0-or-later
 -->
-
 <Project>
   <PropertyGroup>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
@@ -10,7 +9,8 @@ SPDX-License-Identifier: GPL-2.0-or-later
   <ItemGroup>
     <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" />
   </ItemGroup>
-</Project>
+</Project>

REUSE.toml

@@ -3,12 +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/**",
-    ".github/images/**"
+    ".github/images/**",
+    "assets/images/**"
 ]
 precedence = "aggregate"
 SPDX-FileCopyrightText = "SharpEmu Emulator Project"

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/SharpEmu.CLI.csproj

@@ -16,7 +16,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <RuntimeIdentifiers>win-x64;linux-x64;osx-arm64</RuntimeIdentifiers>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>true</PublishSingleFile>
-    <IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract>
+    <!-- <IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract> -->
     <EnableCompressionInSingleFile>true</EnableCompressionInSingleFile>
     <ImplicitUsings>enable</ImplicitUsings>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -30,6 +30,11 @@ 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>
+
   <ItemGroup>
     <Content Include="..\..\LICENSE.txt">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>

src/SharpEmu.CLI/packages.lock.json

@@ -81,6 +81,7 @@
         "dependencies": {
           "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, )"
         }
@@ -103,6 +104,16 @@
           "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, )",

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}");
 			}
 		}
 	}
@@ -302,11 +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

@@ -15,6 +15,9 @@ 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))
@@ -911,7 +914,21 @@ public sealed partial class DirectExecutionBackend
 
 		ulong pageBase = faultAddress & 0xFFFFFFFFFFFFF000uL;
 		uint commitProtect = ResolveLazyCommitProtection(accessType, mbi.AllocationProtect);
-		Console.Error.WriteLine($"[LOADER][TRACE] lazy-query: fault=0x{faultAddress:X16} owner={owner} rip=0x{rip:X16} rsp=0x{rsp:X16} state=0x{mbi.State:X08} base=0x{mbi.BaseAddress:X16} size=0x{mbi.RegionSize:X16} alloc=0x{mbi.AllocationProtect:X08} prot=0x{mbi.Protect:X08}");
+		int traceIndex = Interlocked.Increment(ref _lazyCommitTraceCount);
+		bool traceLazyCommit = ShouldTraceLazyCommit(traceIndex);
+		if (traceLazyCommit)
+		{
+			Console.Error.WriteLine($"[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;
@@ -919,14 +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))
@@ -949,7 +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;
 		}
 
@@ -958,14 +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))
@@ -994,9 +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)
@@ -1023,6 +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/Native/DirectExecutionBackend.Imports.cs

@@ -14,6 +14,9 @@ namespace SharpEmu.Core.Cpu.Native;
 
 public sealed partial class DirectExecutionBackend
 {
+	private readonly object _importResultLogSampleGate = new();
+	private readonly Dictionary<string, int> _importResultLogSamples = new(StringComparer.Ordinal);
+
 	private static ulong ImportDispatchGatewayManaged(nint backendHandle, int importIndex, nint argPackPtr)
 	{
 		try
@@ -73,8 +76,11 @@ public sealed partial class DirectExecutionBackend
 
 	private unsafe ulong DispatchImport(int importIndex, nint argPackPtr)
 	{
-		long num = Interlocked.Increment(ref _importDispatchCount);
-		MarkExecutionProgress();
+		long num = NextImportDispatchIndex();
+		if ((num & 0x3F) == 0)
+		{
+			MarkExecutionProgress();
+		}
 		var cpuContext = ActiveCpuContext;
 		if (cpuContext == null)
 		{
@@ -93,6 +99,12 @@ public sealed partial class DirectExecutionBackend
 			Console.Error.WriteLine($"[LOADER][TRACE] Raw sentinel recoveries: {num2} (last import index={importIndex})");
 			_lastReportedRawSentinelRecoveries = num2;
 		}
+		if (IsLeafImport(importStubEntry.Nid) &&
+			TryDispatchLeafImport(cpuContext, importStubEntry, argPackPtr, num, out var leafResult))
+		{
+			return leafResult;
+		}
+
 		cpuContext.Rip = importStubEntry.Address;
 		cpuContext[CpuRegister.Rdi] = *(ulong*)argPackPtr;
 		cpuContext[CpuRegister.Rsi] = *(ulong*)(argPackPtr + 8);
@@ -106,6 +118,10 @@ public sealed partial class DirectExecutionBackend
 		cpuContext[CpuRegister.R13] = *(ulong*)(argPackPtr + 72);
 		cpuContext[CpuRegister.R14] = *(ulong*)(argPackPtr + 80);
 		cpuContext[CpuRegister.R15] = *(ulong*)(argPackPtr + 88);
+		cpuContext.SetXmmRegister(
+			0,
+			*(ulong*)(argPackPtr - 16),
+			*(ulong*)(argPackPtr - 8));
 		cpuContext[CpuRegister.Rsp] = (ulong)argPackPtr + 96uL;
 		ulong value = cpuContext[CpuRegister.Rdi];
 		ulong value2 = cpuContext[CpuRegister.Rsi];
@@ -120,6 +136,7 @@ public sealed partial class DirectExecutionBackend
 		ulong value7 = cpuContext[CpuRegister.R14];
 		ulong value8 = cpuContext[CpuRegister.R15];
 		ulong num7 = *(ulong*)(argPackPtr + 96);
+		var isGuestWorker = GuestThreadExecution.IsGuestThread;
 		if (!IsLikelyReturnAddress(num7))
 		{
 			for (int i = 1; i <= 4; i++)
@@ -134,19 +151,29 @@ public sealed partial class DirectExecutionBackend
 				}
 			}
 		}
-		TrackDistinctImportNid(importStubEntry.Nid);
-		var probeImportReturn = Environment.GetEnvironmentVariable("SHARPEMU_PROBE_IMPORT_RET");
-		if (!string.IsNullOrWhiteSpace(probeImportReturn) &&
-			(string.Equals(probeImportReturn, "*", StringComparison.Ordinal) ||
-			 string.Equals(probeImportReturn, importStubEntry.Nid, StringComparison.Ordinal)))
+		if (_activeGuestThreadState is { } activeGuestThreadState)
+		{
+			Interlocked.Increment(ref activeGuestThreadState.ImportCount);
+			Volatile.Write(ref activeGuestThreadState.LastImportNid, importStubEntry.Nid);
+			Volatile.Write(ref activeGuestThreadState.LastReturnRip, num7);
+		}
+		if (_logStrlenBursts)
+		{
+			TrackDistinctImportNid(importStubEntry.Nid);
+			TrackStrlenPrelude(importStubEntry.Nid, num, num7);
+		}
+		if (!string.IsNullOrWhiteSpace(_probeImportReturn) &&
+			(string.Equals(_probeImportReturn, "*", StringComparison.Ordinal) ||
+			 string.Equals(_probeImportReturn, importStubEntry.Nid, StringComparison.Ordinal)))
 		{
 			ProbeReturnRip(num7, num);
 		}
-		TrackStrlenPrelude(importStubEntry.Nid, num, num7);
-		TraceGuestContext(
-			$"import dispatch={num} nid={importStubEntry.Nid} ret=0x{num7:X16} managed={Environment.CurrentManagedThreadId} guest=0x{GuestThreadExecution.CurrentGuestThreadHandle:X16} fiber=0x{GuestThreadExecution.CurrentFiberAddress:X16} active={HasActiveExecutionThread}");
-		bool logBootstrap = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_BOOTSTRAP"), "1", StringComparison.Ordinal);
-		if (logBootstrap && string.Equals(importStubEntry.Nid, RuntimeStubNids.BootstrapBridge, StringComparison.Ordinal))
+		if (_logGuestContext)
+		{
+			TraceGuestContext(
+				$"import dispatch={num} nid={importStubEntry.Nid} ret=0x{num7:X16} managed={Environment.CurrentManagedThreadId} guest=0x{GuestThreadExecution.CurrentGuestThreadHandle:X16} fiber=0x{GuestThreadExecution.CurrentFiberAddress:X16} active={HasActiveExecutionThread}");
+		}
+		if (_logBootstrap && string.Equals(importStubEntry.Nid, RuntimeStubNids.BootstrapBridge, StringComparison.Ordinal))
 		{
 			string symbolText = "<unreadable>";
 			if (TryReadAsciiZ(value2, 256, out var sym))
@@ -156,7 +183,10 @@ public sealed partial class DirectExecutionBackend
 			Console.Error.WriteLine(
 				$"[LOADER][TRACE] bootstrap_call#{num}: op=0x{value:X16} sym_ptr=0x{value2:X16} sym='{symbolText}' out_ptr=0x{num3:X16} ret=0x{num7:X16}");
 		}
-		if (!ActiveForcedGuestExit && ShouldForceGuestExitOnImportLoop(importStubEntry.Nid, num7, num, value, value2) && TryForceGuestExitToHostStub(argPackPtr, num, num7, importStubEntry.Nid))
+		if (!isGuestWorker &&
+			!ActiveForcedGuestExit &&
+			ShouldForceGuestExitOnImportLoop(importStubEntry.Nid, num7, num, value, value2) &&
+			TryForceGuestExitToHostStub(argPackPtr, num, num7, importStubEntry.Nid))
 		{
 			cpuContext[CpuRegister.Rax] = 1uL;
 			return 1uL;
@@ -165,27 +195,33 @@ public sealed partial class DirectExecutionBackend
 		bool flag = num7 >= 2156221920u && num7 <= 2156225024u;
 		bool flag2 = num7 >= 2156351360u && num7 <= 2156352080u;
 		bool flag3 = num >= 1020 && num <= 1040;
-		bool logAllImports = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_ALL_IMPORTS"), "1", StringComparison.Ordinal);
-		string importFilter = Environment.GetEnvironmentVariable("SHARPEMU_LOG_IMPORT_FILTER");
-		bool flag4 = !string.IsNullOrWhiteSpace(importFilter);
+		bool flag4 = !string.IsNullOrWhiteSpace(_importFilter);
 		bool flag5 = false;
-		ExportedFunction matchedExport = null;
-		if (_moduleManager.TryGetExport(importStubEntry.Nid, out ExportedFunction export))
+		ExportedFunction? matchedExport = importStubEntry.Export;
+		bool periodicTrace = num <= 128 ||
+			(num >= 240 && num <= 400) ||
+			(num >= 900 && num <= 1300) ||
+			num % 100000 == 0L ||
+			(importStubEntry.Nid == "tsvEmnenz48" && (num <= 256 || num % 1000 == 0L)) ||
+			(importStubEntry.Nid == "rTXw65xmLIA" && (num <= 256 || num % 128 == 0)) ||
+			flag ||
+			flag2 ||
+			flag3;
+		if (matchedExport is not null)
 		{
-			matchedExport = export;
 			if (flag4)
 			{
-				flag5 = export.LibraryName.Contains(importFilter, StringComparison.OrdinalIgnoreCase)
-					|| export.Name.Contains(importFilter, StringComparison.OrdinalIgnoreCase)
-					|| importStubEntry.Nid.Contains(importFilter, StringComparison.OrdinalIgnoreCase);
+				flag5 = matchedExport.LibraryName.Contains(_importFilter!, StringComparison.OrdinalIgnoreCase)
+					|| matchedExport.Name.Contains(_importFilter!, StringComparison.OrdinalIgnoreCase)
+					|| importStubEntry.Nid.Contains(_importFilter!, StringComparison.OrdinalIgnoreCase);
 			}
 		}
 		else if (flag4)
 		{
-			flag5 = importStubEntry.Nid.Contains(importFilter, StringComparison.OrdinalIgnoreCase);
+			flag5 = importStubEntry.Nid.Contains(_importFilter!, StringComparison.OrdinalIgnoreCase);
 		}
-		bool flag6 = logAllImports || flag5;
-		if (!flag0 && (flag6 || num <= 128 || (num >= 240 && num <= 400) || (num >= 900 && num <= 1300) || num % 100000 == 0L || (importStubEntry.Nid == "tsvEmnenz48" && (num <= 256 || num % 1000 == 0L)) || (importStubEntry.Nid == "rTXw65xmLIA" && (num <= 256 || num % 128 == 0)) || flag || flag2 || flag3))
+		bool flag6 = _logAllImports || flag5;
+		if (!flag0 && (flag6 || periodicTrace))
 		{
 			if (matchedExport != null)
 			{
@@ -218,9 +254,15 @@ public sealed partial class DirectExecutionBackend
 				Console.Error.Flush();
 			}
 		}
-		if (!flag0)
+		if (!flag0 && !isGuestWorker)
 		{
-			RecordRecentImportTrace($"#{num} nid={importStubEntry.Nid} ret=0x{num7:X16} rdi=0x{cpuContext[CpuRegister.Rdi]:X16} rsi=0x{cpuContext[CpuRegister.Rsi]:X16} rdx=0x{cpuContext[CpuRegister.Rdx]:X16}");
+			RecordRecentImportTrace(
+				num,
+				importStubEntry.Nid,
+				num7,
+				cpuContext[CpuRegister.Rdi],
+				cpuContext[CpuRegister.Rsi],
+				cpuContext[CpuRegister.Rdx]);
 		}
 		if (importStubEntry.Nid == "8zTFvBIAIN8" && num <= 256)
 		{
@@ -247,11 +289,11 @@ public sealed partial class DirectExecutionBackend
 					Console.Error.WriteLine($"[LOADER][TRACE] ImportStack#{num}: rsp=0x{num9:X16} [0]=0x{value9:X16} [8]=0x{value10:X16} [10]=0x{value11:X16} [18]=0x{value12:X16} [20]=0x{value13:X16} [28]=0x{value14:X16} [30]=0x{value15:X16} [38]=0x{value16:X16} [40]=0x{value17:X16}");
 				}
 			}
-			if (flag6 && string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_IMPORT_FRAMES"), "1", StringComparison.Ordinal))
+			if (flag6 && _logImportFrames)
 			{
 				TraceImportFrameChain(cpuContext, num);
 			}
-			if (flag6 && string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_IMPORT_RECENT"), "1", StringComparison.Ordinal))
+			if (flag6 && _logImportRecent)
 			{
 				DumpRecentImportTrace();
 			}
@@ -262,7 +304,7 @@ public sealed partial class DirectExecutionBackend
 		}
 		if (importStubEntry.Nid == "Ou3iL1abvng")
 		{
-			if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_STACK_CHK"), "1", StringComparison.Ordinal))
+			if (_logStackCheck)
 			{
 				var savedGuardAddress = value4 >= 0x10 ? value4 - 0x10 : 0;
 				var guardKnown = TryReadUInt64Compat(value3, out var guardValue);
@@ -296,13 +338,31 @@ public sealed partial class DirectExecutionBackend
 				{
 					orbisGen2Result = DispatchBootstrapBridge();
 				}
-				else if (string.Equals(importStubEntry.Nid, RuntimeStubNids.KernelDynlibDlsym, StringComparison.Ordinal))
+				else if (string.Equals(importStubEntry.Nid, RuntimeStubNids.KernelDynlibDlsym, StringComparison.Ordinal) ||
+					string.Equals(importStubEntry.Nid, "LwG8g3niqwA", StringComparison.Ordinal))
 				{
 					orbisGen2Result = DispatchKernelDynlibDlsym();
 				}
+				else if (string.Equals(importStubEntry.Nid, "r8mvOaWdi28", StringComparison.Ordinal))
+				{
+					orbisGen2Result = DispatchIl2CppApiLookupSymbol();
+				}
+				else if (importStubEntry.Export is { } cachedExport &&
+					(cachedExport.Target & cpuContext.TargetGeneration) != 0)
+				{
+					cpuContext.ClearRaxWriteFlag();
+					var returnValue = cachedExport.Function(cpuContext);
+					if (!cpuContext.WasRaxWritten)
+					{
+						cpuContext[CpuRegister.Rax] = unchecked((ulong)returnValue);
+					}
+					orbisGen2Result = (OrbisGen2Result)returnValue;
+				}
 				else
 				{
-					dispatchResolved = _moduleManager.TryDispatch(importStubEntry.Nid, cpuContext, out orbisGen2Result);
+					dispatchResolved = false;
+					orbisGen2Result = OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+					cpuContext[CpuRegister.Rax] = unchecked((ulong)(int)orbisGen2Result);
 				}
 			}
 			finally
@@ -318,7 +378,9 @@ public sealed partial class DirectExecutionBackend
 			if (!dispatchResolved)
 			{
 				LastError = "Missing HLE export for NID: " + importStubEntry.Nid;
-				Console.Error.WriteLine($"[LOADER][WARN] Import#{num} unresolved: nid={importStubEntry.Nid} ret=0x{num7:X16}");
+				Console.Error.WriteLine(
+					$"[LOADER][WARN] Import#{num} unresolved: nid={importStubEntry.Nid} ret=0x{num7:X16} " +
+					$"rdi=0x{value:X16} rsi=0x{value2:X16} rdx=0x{num3:X16} rcx=0x{num4:X16} r8=0x{num5:X16} r9=0x{num6:X16}");
 				if (importStubEntry.Nid == "L-Q3LEjIbgA")
 				{
 					string value18 = string.Join(" ", importStubEntry.Nid.Select(delegate (char c)
@@ -337,9 +399,12 @@ public sealed partial class DirectExecutionBackend
 			}
 			else if (orbisGen2Result != OrbisGen2Result.ORBIS_GEN2_OK)
 			{
-				Console.Error.WriteLine(
-					$"[LOADER][WARN] Import#{num} result: {orbisGen2Result} ({importStubEntry.Nid}) " +
-					$"rdi=0x{value:X16} rsi=0x{value2:X16} rdx=0x{num3:X16} rcx=0x{num4:X16} ret=0x{num7:X16}");
+				if (ShouldLogImportResult(importStubEntry.Nid, orbisGen2Result))
+				{
+					Console.Error.WriteLine(
+						$"[LOADER][WARN] Import#{num} result: {orbisGen2Result} ({importStubEntry.Nid}) " +
+						$"rdi=0x{value:X16} rsi=0x{value2:X16} rdx=0x{num3:X16} rcx=0x{num4:X16} ret=0x{num7:X16}");
+				}
 			}
 			cpuContext[CpuRegister.Rbx] = value3;
 			cpuContext[CpuRegister.Rbp] = value4;
@@ -349,11 +414,36 @@ public sealed partial class DirectExecutionBackend
 			cpuContext[CpuRegister.R15] = value8;
 			cpuContext[CpuRegister.Rdi] = value;
 			cpuContext[CpuRegister.Rsi] = value2;
-			if (GuestThreadExecution.TryConsumeCurrentEntryExit(out var exitStatus, out var exitReason))
+			if (GuestThreadExecution.TryConsumeCurrentContextTransfer(out var transferTarget))
 			{
-				if (TryCompleteGuestEntryToHostStub(argPackPtr, num, num7, importStubEntry.Nid, exitReason, exitStatus))
+				if (!TryPrepareGuestContextTransfer(
+						transferTarget,
+						out var transferFrame,
+						out var transferStub,
+						out var transferError))
 				{
-					cpuContext[CpuRegister.Rax] = unchecked((ulong)exitStatus);
+					LastError = transferError ?? "failed to prepare guest context transfer";
+					ActiveForcedGuestExit = true;
+					cpuContext[CpuRegister.Rax] = 18446744071562199298uL;
+					return cpuContext[CpuRegister.Rax];
+				}
+
+				*(ulong*)(argPackPtr + 96) = unchecked((ulong)transferStub);
+				if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_FIBER"), "1", StringComparison.Ordinal))
+				{
+					Console.Error.WriteLine(
+						$"[LOADER][TRACE] fiber.context-transfer rip=0x{transferTarget.Rip:X16} " +
+						$"rsp=0x{transferTarget.Rsp:X16} guest=0x{GuestThreadExecution.CurrentGuestThreadHandle:X16} " +
+						$"fiber=0x{GuestThreadExecution.CurrentFiberAddress:X16}");
+				}
+
+				return unchecked((ulong)transferFrame);
+			}
+			if (GuestThreadExecution.TryConsumeCurrentEntryExit(out var exitValue, out var exitReason))
+			{
+				if (TryCompleteGuestEntryToHostStub(argPackPtr, num, num7, importStubEntry.Nid, exitReason, exitValue))
+				{
+					cpuContext[CpuRegister.Rax] = exitValue;
 				}
 				else
 				{
@@ -361,9 +451,27 @@ public sealed partial class DirectExecutionBackend
 					cpuContext[CpuRegister.Rax] = 18446744071562199298uL;
 				}
 			}
-			if (GuestThreadExecution.TryConsumeCurrentThreadBlock(out var blockReason) &&
+			if (GuestThreadExecution.TryConsumeCurrentThreadBlock(
+					out var blockReason,
+					out var blockContinuation,
+					out var hasBlockContinuation,
+					out var blockWakeKey,
+					out var blockResumeHandler,
+					out var blockWakeHandler,
+					out var blockDeadlineTimestamp) &&
 				TryYieldGuestThreadToHostStub(argPackPtr, num, num7, importStubEntry.Nid, blockReason))
 			{
+				if (hasBlockContinuation)
+				{
+					RegisterBlockedGuestThreadContinuation(
+						GuestThreadExecution.CurrentGuestThreadHandle,
+						blockContinuation,
+						blockWakeKey,
+						blockResumeHandler,
+						blockWakeHandler,
+						blockDeadlineTimestamp);
+				}
+
 				cpuContext[CpuRegister.Rax] = 0uL;
 			}
 			if (flag || flag2 || flag3)
@@ -379,11 +487,341 @@ public sealed partial class DirectExecutionBackend
 		catch (Exception ex)
 		{
 			LastError = $"HLE dispatch error for {importStubEntry.Nid}: {ex.GetType().Name}: {ex.Message}";
+			Console.Error.WriteLine($"[LOADER][ERROR] {LastError}");
+			Console.Error.WriteLine($"[LOADER][ERROR] {ex.StackTrace}");
 			cpuContext[CpuRegister.Rax] = 18446744071562199298uL;
 			return 18446744071562199298uL;
 		}
 	}
 
+	private unsafe bool TryDispatchLeafImport(
+		CpuContext cpuContext,
+		ImportStubEntry importStubEntry,
+		nint argPackPtr,
+		long dispatchIndex,
+		out ulong result)
+	{
+		result = 0;
+		if (importStubEntry.Export is not { } export ||
+			(export.Target & cpuContext.TargetGeneration) == 0)
+		{
+			return false;
+		}
+
+		var arg0 = *(ulong*)argPackPtr;
+		var returnRip = *(ulong*)(argPackPtr + 96);
+		cpuContext.Rip = importStubEntry.Address;
+		cpuContext[CpuRegister.Rdi] = arg0;
+		cpuContext[CpuRegister.Rsi] = *(ulong*)(argPackPtr + 8);
+		cpuContext[CpuRegister.Rdx] = *(ulong*)(argPackPtr + 16);
+		cpuContext[CpuRegister.Rcx] = *(ulong*)(argPackPtr + 24);
+		cpuContext[CpuRegister.R8] = *(ulong*)(argPackPtr + 32);
+		cpuContext[CpuRegister.R9] = *(ulong*)(argPackPtr + 40);
+		cpuContext[CpuRegister.Rbx] = *(ulong*)(argPackPtr + 48);
+		cpuContext[CpuRegister.Rbp] = *(ulong*)(argPackPtr + 56);
+		cpuContext[CpuRegister.R12] = *(ulong*)(argPackPtr + 64);
+		cpuContext[CpuRegister.R13] = *(ulong*)(argPackPtr + 72);
+		cpuContext[CpuRegister.R14] = *(ulong*)(argPackPtr + 80);
+		cpuContext[CpuRegister.R15] = *(ulong*)(argPackPtr + 88);
+		cpuContext[CpuRegister.Rsp] = (ulong)argPackPtr + 96uL;
+
+		if (_activeGuestThreadState is { } activeGuestThreadState)
+		{
+			Interlocked.Increment(ref activeGuestThreadState.ImportCount);
+			Volatile.Write(ref activeGuestThreadState.LastImportNid, importStubEntry.Nid);
+			Volatile.Write(ref activeGuestThreadState.LastReturnRip, returnRip);
+		}
+		if (dispatchIndex % 100000 == 0)
+		{
+			Console.Error.WriteLine(
+				$"[LOADER][TRACE] Import#{dispatchIndex}: {export.LibraryName}:{export.Name} ({importStubEntry.Nid}) " +
+				$"rdi=0x{arg0:X16} rsi=0x{cpuContext[CpuRegister.Rsi]:X16} " +
+				$"rdx=0x{cpuContext[CpuRegister.Rdx]:X16} rcx=0x{cpuContext[CpuRegister.Rcx]:X16} " +
+				$"ret=0x{returnRip:X16}");
+		}
+
+		int returnValue;
+		if (IsNoBlockLeafImport(importStubEntry.Nid))
+		{
+			cpuContext.ClearRaxWriteFlag();
+			returnValue = export.Function(cpuContext);
+			if (!cpuContext.WasRaxWritten)
+			{
+				cpuContext[CpuRegister.Rax] = unchecked((ulong)returnValue);
+			}
+		}
+		else
+		{
+			var previousImportCallFrame = GuestThreadExecution.EnterImportCallFrame(
+				returnRip,
+				(ulong)argPackPtr + 104uL,
+				ActiveGuestReturnSlotAddress);
+			try
+			{
+				cpuContext.ClearRaxWriteFlag();
+				returnValue = export.Function(cpuContext);
+				if (!cpuContext.WasRaxWritten)
+				{
+					cpuContext[CpuRegister.Rax] = unchecked((ulong)returnValue);
+				}
+			}
+			finally
+			{
+				GuestThreadExecution.RestoreImportCallFrame(previousImportCallFrame);
+			}
+		}
+
+		if (returnValue != (int)OrbisGen2Result.ORBIS_GEN2_OK)
+		{
+			var returnResult = (OrbisGen2Result)returnValue;
+			if (ShouldLogImportResult(importStubEntry.Nid, returnResult))
+			{
+				Console.Error.WriteLine(
+					$"[LOADER][WARN] Import#{dispatchIndex} result: {returnResult} ({importStubEntry.Nid}) " +
+					$"rdi=0x{arg0:X16} rsi=0x{cpuContext[CpuRegister.Rsi]:X16} " +
+					$"rdx=0x{cpuContext[CpuRegister.Rdx]:X16} rcx=0x{cpuContext[CpuRegister.Rcx]:X16} " +
+					$"r8=0x{cpuContext[CpuRegister.R8]:X16} r9=0x{cpuContext[CpuRegister.R9]:X16} " +
+					$"ret=0x{returnRip:X16}");
+			}
+		}
+
+		if (GuestThreadExecution.TryConsumeCurrentThreadBlock(
+				out var blockReason,
+				out var blockContinuation,
+				out var hasBlockContinuation,
+				out var blockWakeKey,
+				out var blockResumeHandler,
+				out var blockWakeHandler,
+				out var blockDeadlineTimestamp) &&
+			TryYieldGuestThreadToHostStub(argPackPtr, dispatchIndex, returnRip, importStubEntry.Nid, blockReason))
+		{
+			if (hasBlockContinuation)
+			{
+				RegisterBlockedGuestThreadContinuation(
+					GuestThreadExecution.CurrentGuestThreadHandle,
+					blockContinuation,
+					blockWakeKey,
+					blockResumeHandler,
+					blockWakeHandler,
+					blockDeadlineTimestamp);
+			}
+
+			cpuContext[CpuRegister.Rax] = 0uL;
+		}
+
+		result = cpuContext[CpuRegister.Rax];
+		return true;
+	}
+
+	private static bool IsNoBlockLeafImport(string nid) =>
+		nid is
+			"8aI7R7WaOlc" or // sceAmprCommandBufferConstructor
+			"a8uLzYY--tM" or // sceAmprAprCommandBufferConstructor
+			"Qs1xtplKo0U" or // sceAmprAprCommandBufferDestructor
+			"GuchCTefuZw" or // sceAmprCommandBufferDestructor
+			"N-FSPA4S3nI" or // sceAmprCommandBufferSetBuffer
+			"baQO9ez2gL4" or // sceAmprCommandBufferReset
+			"ULvXMDz56po" or // sceAmprCommandBufferClearBuffer
+			"mQ16-QdKv7k" or // sceAmprAprCommandBufferReadFile
+			"vWU-odnS+fU" or // sceAmprMeasureCommandSizeReadFile
+			"sSAUCCU1dv4" or // sceAmprMeasureCommandSizeWriteKernelEventQueue_04_00
+			"C+IEj+BsAFM" or // sceAmprMeasureCommandSizeWriteAddressOnCompletion
+			"tZDDEo2tE5k" or // sceAmprCommandBufferGetSize
+			"GnxKOHEawhk" or // sceAmprCommandBufferGetCurrentOffset
+			"H896Pt-yB4I" or // sceAmprCommandBufferWriteKernelEventQueue_04_00
+			"sJXyWHjP-F8" or // sceAmprCommandBufferWriteAddressOnCompletion
+			"ASoW5WE-UPo" or // sceKernelAprSubmitCommandBufferAndGetResult
+			"rqwFKI4PAiM" or // sceKernelAprWaitCommandBuffer
+			"eE4Szl8sil8" or // sceKernelAprSubmitCommandBuffer
+			"qvMUCyyaCSI" or // sceKernelAprSubmitCommandBufferAndGetId
+			"Q2V+iqvjgC0" or // vsnprintf
+			"q1cHNfGycLI" or // scePadRead
+			"xk0AcarP3V4" or // scePadOpen
+			"yH17Q6NWtVg" or // sceUserServiceGetEvent
+			"D-CzAxQL0XI" or // sceUserServiceGetPlatformPrivacySetting
+			"K-jXhbt2gn4";   // scePthreadMutexTrylock
+
+	private bool ShouldLogImportResult(string nid, OrbisGen2Result result)
+	{
+		var resultValue = unchecked((int)result);
+		if (resultValue > 0)
+		{
+			return false;
+		}
+
+		var expectedFileProbeMiss =
+			result == OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND &&
+			IsExpectedFileProbeNotFoundNid(nid);
+		var expectedTimedWaitTimeout =
+			string.Equals(nid, "27bAgiJmOh0", StringComparison.Ordinal) &&
+			unchecked((int)result) == 60;
+		var expectedEqueueTimeout =
+			string.Equals(nid, "fzyMKs9kim0", StringComparison.Ordinal) &&
+			result == OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT;
+		var expectedMutexTrylockBusy =
+			string.Equals(nid, "K-jXhbt2gn4", StringComparison.Ordinal) &&
+			result == OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY;
+		var expectedUserServiceNoEvent =
+			string.Equals(nid, "yH17Q6NWtVg", StringComparison.Ordinal) &&
+			resultValue == unchecked((int)0x80960007);
+		var expectedPrivacyInvalidParameter =
+			string.Equals(nid, "D-CzAxQL0XI", StringComparison.Ordinal) &&
+			resultValue == unchecked((int)0x80960009);
+		if (!expectedFileProbeMiss &&
+			!expectedTimedWaitTimeout &&
+			!expectedEqueueTimeout &&
+			!expectedMutexTrylockBusy &&
+			!expectedUserServiceNoEvent &&
+			!expectedPrivacyInvalidParameter)
+		{
+			return true;
+		}
+
+		if (!ShouldLogExpectedImportResults())
+		{
+			return false;
+		}
+
+		var key = nid + "\0" + resultValue;
+		int count;
+		lock (_importResultLogSampleGate)
+		{
+			_importResultLogSamples.TryGetValue(key, out count);
+			count++;
+			_importResultLogSamples[key] = count;
+		}
+
+		return count <= 8 || count % 10000 == 0;
+	}
+
+	private static bool ShouldLogExpectedImportResults() =>
+		string.Equals(
+			Environment.GetEnvironmentVariable("SHARPEMU_LOG_EXPECTED_IMPORT_RESULTS"),
+			"1",
+			StringComparison.Ordinal);
+
+	private static bool IsExpectedFileProbeNotFoundNid(string nid) =>
+		nid is
+			"eV9wAD2riIA" or // sceKernelStat
+			"1G3lF1Gg1k8" or // sceKernelOpen
+			"gEpBkcwxUjw";   // sceKernelAprResolveFilepathsToIdsAndFileSizes
+
+	private bool IsLeafImport(string nid)
+	{
+		if (nid == "1jfXLRVzisc")
+		{
+			return !_logUsleep;
+		}
+
+		return nid is
+			"9UK1vLZQft4" or
+			"tn3VlD0hG60" or
+			"7H0iTOciTLo" or
+			"2Z+PpY6CaJg" or
+			"8aI7R7WaOlc" or
+			"zgXifHT9ErY" or // sceVideoOutIsFlipPending
+			"V++UgBtQhn0" or // sceAgcGetDataPacketPayloadAddress
+			"qj7QZpgr9Uw" or // Gen5 graphics type-2 packet
+			"LtTouSCZjHM" or // sceAgcCbNop
+			"k3GhuSNmBLU" or // sceAgcCbDispatch
+			"UZbQjYAwwXM" or // sceAgcCbSetShRegistersDirect
+			"JrtiDtKeS38" or // sceAgcAcbResetQueue
+			"cFazmnXpJOE" or // sceAgcAcbEventWrite
+			"KT-hTp-Ch14" or // sceAgcAcbAcquireMem
+			"htn36gPnBk4" or // sceAgcAcbWaitRegMem
+			"eZ4+17OQz4Q" or // sceAgcAcbWriteData
+			"j3EtxFkSIhQ" or // sceAgcAcbDispatchIndirect
+			"gSRnr79F8tQ" or // sceAgcDriverSubmitAcb
+			"i1jyy49AjXU" or // sceAgcDcbWriteData
+			"VmW0Tdpy420" or // sceAgcDcbWaitRegMem
+			"WmAc2MEj6Io" or // sceAgcDcbDmaData
+			"rUuVjyR+Rd4" or // sceAgcDcbGetLodStatsGetSize
+			"vuSXe69VILM" or // sceAgcDcbGetLodStats
+			"RmaJwLtc8rY" or // sceAgcDcbSetBaseIndirectArgs
+			"CtB+A9-VxO0" or // sceAgcDcbDispatchIndirect
+			"+kSrjIVxKFE" or // sceAgcDcbPushMarker
+			"H7uZqCoNuWk" or // sceAgcDcbPopMarker
+			"IxYiarKlXxM" or // sceAgcDmaDataPatchSetDstAddressOrOffset
+			"3KDcnM3lrcU" or // sceAgcWaitRegMemPatchAddress
+			"0fWWK5uG9rQ" or // sceAgcQueueEndOfPipeActionPatchAddress
+			"a8uLzYY--tM" or
+			"Qs1xtplKo0U" or
+			"GuchCTefuZw" or
+			"N-FSPA4S3nI" or
+			"baQO9ez2gL4" or
+			"ULvXMDz56po" or
+			"mQ16-QdKv7k" or
+			"vWU-odnS+fU" or
+			"sSAUCCU1dv4" or
+			"C+IEj+BsAFM" or
+			"tZDDEo2tE5k" or
+			"GnxKOHEawhk" or
+			"H896Pt-yB4I" or
+			"sJXyWHjP-F8" or
+			"ASoW5WE-UPo" or
+			"rqwFKI4PAiM" or
+			"eE4Szl8sil8" or
+			"qvMUCyyaCSI" or
+			"Vo5V8KAwCmk" or // sceSystemServiceHideSplashScreen
+			"TywrFKCoLGY" or // sceSaveDataInitialize3
+			"dyIhnXq-0SM" or // sceSaveDataDirNameSearch
+			"ZP4e7rlzOUk" or // sceSaveDataMount3
+			"ERKzksauAJA" or // sceSaveDataDialogGetStatus
+			"KK3Bdg1RWK0" or // sceSaveDataDialogUpdateStatus
+			"en7gNVnh878" or // sceSaveDataDialogIsReadyToDisplay
+			"jO8DM8oyego" or // sceNpEntitlementAccessInitialize
+			"TFyU+KFBv54" or // sceNpEntitlementAccessGetAddcontEntitlementInfoList
+			"27bAgiJmOh0" or // pthread_cond_timedwait
+			"iQw3iQPhvUQ" or // sceNetCtlCheckCallback
+			"Q2V+iqvjgC0" or // vsnprintf
+			"j4ViWNHEgww" or // strlen
+			"5jNubw4vlAA" or // strnlen
+			"LHMrG7e8G78" or // wcslen
+			"WkkeywLJcgU" or // wcslen
+			"Ovb2dSJOAuE" or // strcmp
+			"aesyjrHVWy4" or // strncmp
+			"pNtJdE3x49E" or // wcscmp
+			"fV2xHER+bKE" or // wcscoll
+			"E8wCoUEbfzk" or // wcsncmp
+			"Q3VBxCXhUHs" or // memcpy
+			"+P6FRGH4LfA" or // memmove
+			"DfivPArhucg" or // memcmp
+			"ytQULN-nhL4" or // pthread_rwlock_init
+			"6ULAa0fq4jA" or // scePthreadRwlockInit
+			"1471ajPzxh0" or // pthread_rwlock_destroy
+			"BB+kb08Tl9A" or // scePthreadRwlockDestroy
+			"iGjsr1WAtI0" or // pthread_rwlock_rdlock
+			"Ox9i0c7L5w0" or // scePthreadRwlockRdlock
+			"sIlRvQqsN2Y" or // pthread_rwlock_wrlock
+			"mqdNorrB+gI" or // scePthreadRwlockWrlock
+			"EgmLo6EWgso" or // pthread_rwlock_unlock
+			"+L98PIbGttk" or // scePthreadRwlockUnlock
+			"aI+OeCz8xrQ" or // scePthreadSelf
+			"EotR8a3ASf4" or // pthread_self
+			"eoht7mQOCmo" or // scePthreadGetspecific
+			"0-KXaS70xy4" or // pthread_getspecific
+			"+BzXYkqYeLE" or // scePthreadSetspecific
+			"WrOLvHU0yQM" or // pthread_setspecific
+			"vz+pg2zdopI" or // sceKernelGetEventUserData
+			"mJ7aghmgvfc" or // sceKernelGetEventId
+			"23CPPI1tyBY" or // sceKernelGetEventFilter
+			"kwGyyjohI50";   // sceKernelGetEventData
+	}
+
+	private long NextImportDispatchIndex()
+	{
+		if (!ReferenceEquals(_importCounterOwner, this) ||
+			_nextImportDispatchIndex >= _importDispatchBlockEnd)
+		{
+			var blockEnd = Interlocked.Add(ref _importDispatchCount, ImportDispatchBlockSize);
+			_importCounterOwner = this;
+			_nextImportDispatchIndex = blockEnd - ImportDispatchBlockSize + 1;
+			_importDispatchBlockEnd = blockEnd + 1;
+		}
+
+		return _nextImportDispatchIndex++;
+	}
+
 	private void TraceImportFrameChain(CpuContext context, long dispatchIndex)
 	{
 		var frame = context[CpuRegister.Rbp];
@@ -431,7 +869,7 @@ public sealed partial class DirectExecutionBackend
 		return true;
 	}
 
-	private unsafe bool TryCompleteGuestEntryToHostStub(nint argPackPtr, long dispatchIndex, ulong returnRip, string nid, string reason, int status)
+	private unsafe bool TryCompleteGuestEntryToHostStub(nint argPackPtr, long dispatchIndex, ulong returnRip, string nid, string reason, ulong value)
 	{
 		ulong hostExit = ActiveEntryReturnSentinelRip;
 		if (hostExit < 65536 || !TryPatchActiveGuestReturnSlot(hostExit))
@@ -447,7 +885,7 @@ public sealed partial class DirectExecutionBackend
 			return false;
 		}
 		Console.Error.WriteLine(
-			$"[LOADER][INFO] Guest entry exit at import#{dispatchIndex}: nid={nid} ret=0x{returnRip:X16} reason={reason} status={status}");
+			$"[LOADER][INFO] Guest entry exit at import#{dispatchIndex}: nid={nid} ret=0x{returnRip:X16} reason={reason} value=0x{value:X16}");
 		return true;
 	}
 
@@ -469,8 +907,11 @@ public sealed partial class DirectExecutionBackend
 
 		ActiveGuestThreadYieldRequested = true;
 		ActiveGuestThreadYieldReason = string.IsNullOrWhiteSpace(reason) ? nid : reason;
-		Console.Error.WriteLine(
-			$"[LOADER][INFO] Guest thread yield at import#{dispatchIndex}: nid={nid} ret=0x{returnRip:X16} reason={ActiveGuestThreadYieldReason}");
+		if (_logGuestThreads)
+		{
+			Console.Error.WriteLine(
+				$"[LOADER][INFO] Guest thread yield at import#{dispatchIndex}: nid={nid} ret=0x{returnRip:X16} reason={ActiveGuestThreadYieldReason}");
+		}
 		return true;
 	}
 
@@ -488,7 +929,7 @@ public sealed partial class DirectExecutionBackend
 		{
 			return false;
 		}
-		if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_DISABLE_IMPORT_LOOP_GUARD"), "1", StringComparison.Ordinal))
+		if (_disableImportLoopGuard || _importLoopGuardSeconds <= 0)
 		{
 			return false;
 		}
@@ -503,6 +944,10 @@ public sealed partial class DirectExecutionBackend
 			_importNidHashCache[nid] = value;
 		}
 		RecordImportLoopSignature(value, returnRip, BuildImportLoopSignature(value, returnRip, arg0, arg1));
+		if ((dispatchIndex & 0x3F) != 0)
+		{
+			return false;
+		}
 		if (!HasRepeatingImportLoopPattern())
 		{
 			if (_importLoopPatternHits > 0)
@@ -520,14 +965,13 @@ public sealed partial class DirectExecutionBackend
 			_importLoopPatternStartTimestamp = Stopwatch.GetTimestamp();
 		}
 		_importLoopPatternHits++;
-		var guardSeconds = GetImportLoopGuardSeconds();
-		if (guardSeconds <= 0 || _importLoopPatternHits < 6)
+		if (_importLoopPatternHits < 6)
 		{
 			return false;
 		}
 
 		var elapsedTicks = Stopwatch.GetTimestamp() - _importLoopPatternStartTimestamp;
-		return elapsedTicks >= (long)(guardSeconds * Stopwatch.Frequency);
+		return elapsedTicks >= (long)(_importLoopGuardSeconds * Stopwatch.Frequency);
 	}
 
 	private static bool IsImportLoopGuardBoundary(string nid) =>
@@ -778,8 +1222,11 @@ public sealed partial class DirectExecutionBackend
 			cpuContext[CpuRegister.Rax] = 18446744073709551615uL;
 			return OrbisGen2Result.ORBIS_GEN2_OK;
 		}
-		if (!TryResolveRuntimeSymbolAddress(symbolName, out var resolvedAddress))
+		if (!TryResolveRuntimeSymbolAddress(symbolName, out var resolvedAddress) &&
+			!TryResolveRuntimeSymbolAlias(symbolName, out resolvedAddress))
 		{
+			Console.Error.WriteLine(
+				$"[LOADER][WARN] sceKernelDlsym failed: handle=0x{cpuContext[CpuRegister.Rdi]:X} symbol='{symbolName}'");
 			cpuContext[CpuRegister.Rax] = 18446744073709551615uL;
 			return OrbisGen2Result.ORBIS_GEN2_OK;
 		}
@@ -792,6 +1239,62 @@ public sealed partial class DirectExecutionBackend
 		return OrbisGen2Result.ORBIS_GEN2_OK;
 	}
 
+	private bool TryResolveRuntimeSymbolAlias(string symbolName, out ulong address)
+	{
+		address = 0;
+		var alias = symbolName switch
+		{
+			"scriptingGetMem" => "malloc",
+			"scriptingFreeMem" => "free",
+			"scriptingRealloc" => "realloc",
+			"scriptingCalloc" => "calloc",
+			_ => null,
+		};
+
+		return alias != null && TryResolveRuntimeSymbolAddress(alias, out address);
+	}
+
+	private OrbisGen2Result DispatchIl2CppApiLookupSymbol()
+	{
+		var cpuContext = ActiveCpuContext;
+		if (cpuContext == null)
+		{
+			return OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+		}
+
+		var symbolNameAddress = cpuContext[CpuRegister.Rdi];
+		var outputAddress = cpuContext[CpuRegister.Rsi];
+		if (!TryReadAsciiZ(symbolNameAddress, 512, out var symbolName) ||
+			outputAddress == 0 ||
+			!TryResolveIl2CppApiAddress(symbolName, out var resolvedAddress) ||
+			!TryWriteUInt64Compat(outputAddress, resolvedAddress))
+		{
+			Console.Error.WriteLine(
+				$"[LOADER][WARN] il2cpp_api_lookup_symbol failed: name='{symbolName}' out=0x{outputAddress:X16}");
+			if (outputAddress != 0)
+			{
+				_ = TryWriteUInt64Compat(outputAddress, 0);
+			}
+
+			cpuContext[CpuRegister.Rax] = ulong.MaxValue;
+			return OrbisGen2Result.ORBIS_GEN2_OK;
+		}
+
+		cpuContext[CpuRegister.Rax] = 0;
+		return OrbisGen2Result.ORBIS_GEN2_OK;
+	}
+
+	private bool TryResolveIl2CppApiAddress(string symbolName, out ulong address)
+	{
+		if (TryResolveRuntimeSymbolAddress(symbolName, out address))
+		{
+			return true;
+		}
+
+		return Aerolib.Instance.TryGetByExportName(symbolName, out var symbol) &&
+			TryResolveRuntimeSymbolAddress(symbol.Nid, out address);
+	}
+
 	private OrbisGen2Result DispatchBootstrapBridge()
 	{
 		var cpuContext = ActiveCpuContext;
@@ -810,8 +1313,7 @@ public sealed partial class DirectExecutionBackend
 		{
 			return result;
 		}
-		bool logBootstrap = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_BOOTSTRAP"), "1", StringComparison.Ordinal);
-		if (logBootstrap)
+		if (_logBootstrap)
 		{
 			Console.Error.WriteLine(
 				$"[LOADER][TRACE] bootstrap_dispatch: handle=0x{bridgeHandle:X16} symbol='{symbolName}' out=0x{outputAddress:X16} rax=0x{cpuContext[CpuRegister.Rax]:X16}");

src/SharpEmu.Core/Memory/PhysicalVirtualMemory.cs

@@ -9,9 +9,11 @@ namespace SharpEmu.Core.Memory;
 
 public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryAllocator, IDisposable
 {
-    private readonly object _gate = new();
+    private readonly ReaderWriterLockSlim _gate = new(LockRecursionPolicy.SupportsRecursion);
     private readonly object _guestAllocationGate = new();
+    private readonly object _allocationSearchHintGate = new();
     private readonly List<MemoryRegion> _regions = new();
+    private readonly Dictionary<(ulong DesiredAddress, ulong Alignment, bool Executable), ulong> _allocationSearchHints = new();
     private readonly Dictionary<ulong, ProgramHeaderFlags> _pageProtections = new();
     private bool _disposed;
     private const ulong PageSize = 0x1000;
@@ -19,7 +21,8 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
     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;
@@ -35,6 +38,7 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
 
     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);
@@ -78,9 +82,10 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
             return false;
         }
 
-        lock (_gate)
+        _gate.EnterWriteLock();
+        try
         {
-            _regions.Add(new MemoryRegion
+            InsertRegionSorted(new MemoryRegion
             {
                 VirtualAddress = actualAddress,
                 Size = alignedSize,
@@ -89,9 +94,13 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
                 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;
     }
 
@@ -105,7 +114,9 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
         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)
@@ -134,7 +145,7 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
                 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)
@@ -188,12 +199,12 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
                     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
@@ -202,9 +213,10 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
             }
         }
 
-        lock (_gate)
+        _gate.EnterWriteLock();
+        try
         {
-            _regions.Add(new MemoryRegion
+            InsertRegionSorted(new MemoryRegion
             {
                 VirtualAddress = actualAddress,
                 Size = alignedSize,
@@ -213,11 +225,15 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
                 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;
     }
@@ -237,7 +253,8 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
 
         var alignedSize = AlignUp(size, PageSize);
         var effectiveAlignment = Math.Max(PageSize, alignment == 0 ? PageSize : alignment);
-        var cursor = AlignUp(desiredAddress, effectiveAlignment);
+        var requestedCursor = AlignUp(desiredAddress, effectiveAlignment);
+        var cursor = GetAllocationSearchCursor(desiredAddress, requestedCursor, effectiveAlignment, executable);
 
         for (var attempt = 0; attempt < 0x10000; attempt++)
         {
@@ -257,6 +274,7 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
                 actualAddress = AllocateAt(cursor, alignedSize, executable, allowAlternative: false);
                 if (actualAddress == cursor)
                 {
+                    UpdateAllocationSearchCursor(desiredAddress, effectiveAlignment, executable, actualAddress + alignedSize);
                     return true;
                 }
 
@@ -315,7 +333,8 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
     {
         lock (_guestAllocationGate)
         {
-            lock (_gate)
+            _gate.EnterWriteLock();
+            try
             {
                 foreach (var region in _regions)
                 {
@@ -323,6 +342,14 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
                 }
                 _regions.Clear();
                 _pageProtections.Clear();
+                lock (_allocationSearchHintGate)
+                {
+                    _allocationSearchHints.Clear();
+                }
+            }
+            finally
+            {
+                _gate.ExitWriteLock();
             }
 
             _guestAllocationArenaBase = 0;
@@ -343,7 +370,8 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
         var mapEnd = AlignUp(segmentEnd, PageSize);
         var mapSize = checked(mapEnd - mapStart);
 
-        lock (_gate)
+        _gate.EnterWriteLock();
+        try
         {
             var existingRegion = FindRegion(mapStart, mapSize);
             if (existingRegion == null)
@@ -374,7 +402,11 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
 
             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();
         }
     }
 
@@ -425,7 +457,8 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
 
     public IReadOnlyList<VirtualMemoryRegion> SnapshotRegions()
     {
-        lock (_gate)
+        _gate.EnterReadLock();
+        try
         {
             var snapshot = new VirtualMemoryRegion[_regions.Count];
             for (var i = 0; i < _regions.Count; i++)
@@ -440,96 +473,240 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
             }
             return snapshot;
         }
+        finally
+        {
+            _gate.ExitReadLock();
+        }
     }
 
     public bool TryRead(ulong virtualAddress, Span<byte> destination)
     {
-        lock (_gate)
+        var requiresExclusiveAccess = false;
+        _gate.EnterReadLock();
+        try
         {
-            foreach (var region in _regions)
+            var region = FindRegion(virtualAddress, (ulong)destination.Length);
+            if (region is not null &&
+                TryResolveRegionOffset(
+                    virtualAddress,
+                    (ulong)destination.Length,
+                    region,
+                    out var offset))
             {
-                if (TryResolveRegionOffset(virtualAddress, (ulong)destination.Length, region, out var offset))
+                var srcPtr = (void*)(region.VirtualAddress + offset);
+                if (destination.IsEmpty)
                 {
-                    var srcPtr = (void*)(region.VirtualAddress + offset);
-                    if (destination.IsEmpty)
-                    {
-                        return true;
-                    }
+                    return true;
+                }
 
+                if (region.IsReservedOnly)
+                {
                     if (!EnsureRangeCommitted((ulong)srcPtr, (ulong)destination.Length, region))
                     {
                         return false;
                     }
+                }
 
-                    if (!TryTemporarilyProtectForRead((ulong)srcPtr, (ulong)destination.Length, region, out var touchedPages))
+                if (!CanReadWithoutProtectionChange((ulong)srcPtr, (ulong)destination.Length, region))
+                {
+                    requiresExclusiveAccess = true;
+                }
+                else
+                {
+                    fixed (byte* destPtr = destination)
                     {
-                        return false;
-                    }
-
-                    try
-                    {
-                        fixed (byte* destPtr = destination)
-                        {
-                            Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
-                        }
-                    }
-                    finally
-                    {
-                        RestorePageProtections(touchedPages);
+                        Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
                     }
 
                     return true;
                 }
             }
+        }
+        finally
+        {
+            _gate.ExitReadLock();
+        }
+
+        if (!requiresExclusiveAccess)
+        {
             return false;
         }
+
+        _gate.EnterWriteLock();
+        try
+        {
+            return TryReadExclusive(virtualAddress, destination);
+        }
+        finally
+        {
+            _gate.ExitWriteLock();
+        }
     }
 
     public bool TryWrite(ulong virtualAddress, ReadOnlySpan<byte> source)
     {
-        lock (_gate)
+        var requiresExclusiveAccess = false;
+        _gate.EnterReadLock();
+        try
         {
-            foreach (var region in _regions)
+            var region = FindRegion(virtualAddress, (ulong)source.Length);
+            if (region is not null &&
+                TryResolveRegionOffset(
+                    virtualAddress,
+                    (ulong)source.Length,
+                    region,
+                    out var offset))
             {
-                if (TryResolveRegionOffset(virtualAddress, (ulong)source.Length, region, out var offset))
+                var destPtr = (void*)(region.VirtualAddress + offset);
+                if (source.IsEmpty)
                 {
-                    var destPtr = (void*)(region.VirtualAddress + offset);
-                    if (source.IsEmpty)
-                    {
-                        return true;
-                    }
+                    return true;
+                }
 
+                if (region.IsReservedOnly)
+                {
                     if (!EnsureRangeCommitted((ulong)destPtr, (ulong)source.Length, region))
                     {
                         return false;
                     }
+                }
 
-                    if (!VirtualProtect(destPtr, (nuint)source.Length, PAGE_EXECUTE_READWRITE, out var oldProtect))
+                if (!CanWriteWithoutProtectionChange((ulong)destPtr, (ulong)source.Length, region))
+                {
+                    requiresExclusiveAccess = true;
+                }
+                else
+                {
+                    fixed (byte* srcPtr = source)
                     {
-                        return false;
-                    }
-
-                    try
-                    {
-                        fixed (byte* srcPtr = source)
-                        {
-                            Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
-                        }
-                    }
-                    finally
-                    {
-                        VirtualProtect(destPtr, (nuint)source.Length, oldProtect, out _);
-                        if (IsExecutableProtection(oldProtect))
-                        {
-                            FlushInstructionCache(null, destPtr, (nuint)source.Length);
-                        }
+                        Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
                     }
 
                     return true;
                 }
             }
+        }
+        finally
+        {
+            _gate.ExitReadLock();
+        }
+
+        if (!requiresExclusiveAccess)
+        {
             return false;
         }
+
+        _gate.EnterWriteLock();
+        try
+        {
+            return TryWriteExclusive(virtualAddress, source);
+        }
+        finally
+        {
+            _gate.ExitWriteLock();
+        }
+    }
+
+    private bool TryReadExclusive(ulong virtualAddress, Span<byte> destination)
+    {
+        var region = FindRegion(virtualAddress, (ulong)destination.Length);
+        if (region is not null &&
+            TryResolveRegionOffset(
+                virtualAddress,
+                (ulong)destination.Length,
+                region,
+                out var offset))
+        {
+            var srcPtr = (void*)(region.VirtualAddress + offset);
+            if (!EnsureRangeCommitted((ulong)srcPtr, (ulong)destination.Length, region))
+            {
+                return false;
+            }
+
+            if (CanReadWithoutProtectionChange((ulong)srcPtr, (ulong)destination.Length, region))
+            {
+                fixed (byte* destPtr = destination)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
+                }
+
+                return true;
+            }
+
+            if (!TryTemporarilyProtectForRead((ulong)srcPtr, (ulong)destination.Length, region, out var touchedPages))
+            {
+                return false;
+            }
+
+            try
+            {
+                fixed (byte* destPtr = destination)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)destination.Length, (nuint)destination.Length);
+                }
+            }
+            finally
+            {
+                RestorePageProtections(touchedPages);
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    private bool TryWriteExclusive(ulong virtualAddress, ReadOnlySpan<byte> source)
+    {
+        var region = FindRegion(virtualAddress, (ulong)source.Length);
+        if (region is not null &&
+            TryResolveRegionOffset(
+                virtualAddress,
+                (ulong)source.Length,
+                region,
+                out var offset))
+        {
+            var destPtr = (void*)(region.VirtualAddress + offset);
+            if (!EnsureRangeCommitted((ulong)destPtr, (ulong)source.Length, region))
+            {
+                return false;
+            }
+
+            if (CanWriteWithoutProtectionChange((ulong)destPtr, (ulong)source.Length, region))
+            {
+                fixed (byte* srcPtr = source)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
+                }
+
+                return true;
+            }
+
+            if (!VirtualProtect(destPtr, (nuint)source.Length, PAGE_EXECUTE_READWRITE, out var oldProtect))
+            {
+                return false;
+            }
+
+            try
+            {
+                fixed (byte* srcPtr = source)
+                {
+                    Buffer.MemoryCopy(srcPtr, destPtr, (nuint)source.Length, (nuint)source.Length);
+                }
+            }
+            finally
+            {
+                VirtualProtect(destPtr, (nuint)source.Length, oldProtect, out _);
+                if (IsExecutableProtection(oldProtect))
+                {
+                    FlushInstructionCache(null, destPtr, (nuint)source.Length);
+                }
+            }
+
+            return true;
+        }
+
+        return false;
     }
 
     public bool TryWriteUInt64(ulong virtualAddress, ulong value)
@@ -541,45 +718,76 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
 
     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)
@@ -591,21 +799,67 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
         }
 
         var end = address + size;
-        lock (_gate)
+        _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)
     {
         offset = 0;
@@ -633,6 +887,44 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
         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;
@@ -649,15 +941,26 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
         var endPage = AlignUp(address + size, PageSize);
         var commitProtection = GetCommitProtection(region);
 
-        for (var pageAddress = startPage; pageAddress < endPage; pageAddress += PageSize)
+        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;
             }
 
@@ -666,10 +969,13 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
                 return false;
             }
 
-            if (VirtualAlloc((void*)pageAddress, (nuint)PageSize, MEM_COMMIT, commitProtection) == null)
+            var commitSize = rangeEnd - pageAddress;
+            if (VirtualAlloc((void*)pageAddress, (nuint)commitSize, MEM_COMMIT, commitProtection) == null)
             {
                 return false;
             }
+
+            pageAddress = rangeEnd;
         }
 
         return true;
@@ -722,6 +1028,29 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IGuestMemoryA
         return checked((value + mask) & ~mask);
     }
 
+    private static ulong ResolveLazyReservePrimeBytes()
+    {
+        var configured = Environment.GetEnvironmentVariable("SHARPEMU_LAZY_RESERVE_PRIME_MB");
+        if (ulong.TryParse(configured, out var megabytes))
+        {
+            return megabytes == 0
+                ? 0
+                : checked(Math.Min(megabytes, 4096UL) * 1024UL * 1024UL);
+        }
+
+        return DefaultLazyReservePrimeBytes;
+    }
+
+    private static void TraceVmem(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_VMEM"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[VMEM] {message}");
+    }
+
     public void Dispose()
     {
         if (!_disposed)

src/SharpEmu.Core/Runtime/SharpEmuRuntime.cs

@@ -10,6 +10,7 @@ using SharpEmu.HLE;
 using SharpEmu.Libs.VideoOut;
 using SharpEmu.Libs.Kernel;
 using SharpEmu.Libs.AppContent;
+using SharpEmu.Libs.SaveData;
 using System.Buffers.Binary;
 using System.Collections.Generic;
 using System.Linq;
@@ -136,6 +137,7 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         KernelModuleRegistry.Reset();
         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}");
@@ -541,6 +543,7 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         {
             Path.Combine(ebootDirectory, "sce_module"),
             Path.Combine(ebootDirectory, "sce_modules"),
+            Path.Combine(ebootDirectory, "Media", "Modules"),
         }
         .Distinct(StringComparer.OrdinalIgnoreCase)
         .Where(Directory.Exists)
@@ -552,7 +555,9 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
         }
 
         var allModulePaths = moduleDirectories
-            .SelectMany(Directory.EnumerateFiles)
+            .SelectMany(directory => Directory
+                .EnumerateFiles(directory)
+                .OrderBy(path => path, StringComparer.OrdinalIgnoreCase))
             .Where(path =>
             {
                 var extension = Path.GetExtension(path);
@@ -560,7 +565,6 @@ public sealed class SharpEmuRuntime : ISharpEmuRuntime
                        string.Equals(extension, ".sprx", StringComparison.OrdinalIgnoreCase);
             })
             .Distinct(StringComparer.OrdinalIgnoreCase)
-            .OrderBy(path => path, StringComparer.OrdinalIgnoreCase)
             .ToArray();
 
         var modulePaths = allModulePaths

src/SharpEmu.Core/packages.lock.json

@@ -72,6 +72,7 @@
         "dependencies": {
           "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, )"
         }
@@ -88,6 +89,16 @@
           "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, )",

src/SharpEmu.HLE/GuestThreadExecution.cs

@@ -1,6 +1,8 @@
 // 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(
@@ -8,14 +10,37 @@ public readonly record struct GuestThreadStartRequest(
     ulong EntryPoint,
     ulong Argument,
     ulong AttributeAddress,
-    string Name);
+    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,
@@ -71,15 +96,39 @@ public static class GuestThreadExecution
     [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 int _pendingEntryExitStatus;
+    private static ulong _pendingEntryExitValue;
 
     [ThreadStatic]
     private static string? _pendingEntryExitReason;
 
+    [ThreadStatic]
+    private static bool _pendingContextTransfer;
+
+    [ThreadStatic]
+    private static GuestCpuContinuation _pendingContextTransferTarget;
+
     [ThreadStatic]
     private static bool _hasCurrentImportCallFrame;
 
@@ -105,9 +154,17 @@ public static class GuestThreadExecution
         var previous = _currentGuestThreadHandle;
         _currentGuestThreadHandle = threadHandle;
         _pendingBlockReason = null;
+        _pendingBlockContinuationValid = false;
+        _pendingBlockContinuation = default;
+        _pendingBlockWakeKey = null;
+        _pendingBlockResumeHandler = null;
+        _pendingBlockWakeHandler = null;
+        _pendingBlockDeadlineTimestamp = 0;
         _pendingEntryExit = false;
-        _pendingEntryExitStatus = 0;
+        _pendingEntryExitValue = 0;
         _pendingEntryExitReason = null;
+        _pendingContextTransfer = false;
+        _pendingContextTransferTarget = default;
         _hasCurrentImportCallFrame = false;
         _currentImportReturnRip = 0;
         _currentImportResumeRsp = 0;
@@ -119,9 +176,17 @@ public static class GuestThreadExecution
     {
         _currentGuestThreadHandle = previousThreadHandle;
         _pendingBlockReason = null;
+        _pendingBlockContinuationValid = false;
+        _pendingBlockContinuation = default;
+        _pendingBlockWakeKey = null;
+        _pendingBlockResumeHandler = null;
+        _pendingBlockWakeHandler = null;
+        _pendingBlockDeadlineTimestamp = 0;
         _pendingEntryExit = false;
-        _pendingEntryExitStatus = 0;
+        _pendingEntryExitValue = 0;
         _pendingEntryExitReason = null;
+        _pendingContextTransfer = false;
+        _pendingContextTransferTarget = default;
         _hasCurrentImportCallFrame = false;
         _currentImportReturnRip = 0;
         _currentImportResumeRsp = 0;
@@ -140,7 +205,15 @@ public static class GuestThreadExecution
         _currentFiberAddress = previousFiberAddress;
     }
 
-    public static bool RequestCurrentThreadBlock(string reason)
+    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)
         {
@@ -148,31 +221,167 @@ public static class GuestThreadExecution
         }
 
         _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;
-        _pendingEntryExitStatus = status;
+        _pendingEntryExitValue = value;
         _pendingEntryExitReason = string.IsNullOrWhiteSpace(reason) ? "guest_entry_exit" : reason;
     }
 
-    public static bool TryConsumeCurrentEntryExit(out int status, out string reason)
+    public static bool TryConsumeCurrentEntryExit(out ulong value, out string reason)
     {
-        status = _pendingEntryExitStatus;
+        value = _pendingEntryExitValue;
         reason = _pendingEntryExitReason ?? string.Empty;
         if (!_pendingEntryExit)
         {
@@ -180,11 +389,30 @@ public static class GuestThreadExecution
         }
 
         _pendingEntryExit = false;
-        _pendingEntryExitStatus = 0;
+        _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,

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 +1,154 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+
+namespace SharpEmu.Libs.Agc;
+
+internal static class Gen5ShaderMetadataReader
+{
+    private const ulong ShaderUserDataOffset = 0x08;
+    private const int ResourceClassCount = 4;
+    private const int MaxMetadataEntries = 4096;
+
+    public static bool TryRead(
+        CpuContext ctx,
+        ulong shaderHeaderAddress,
+        out Gen5ShaderMetadata metadata)
+    {
+        metadata = default!;
+        if (!TryReadUInt64(ctx, shaderHeaderAddress + ShaderUserDataOffset, out var userDataAddress) ||
+            userDataAddress == 0 ||
+            !TryReadUInt64(ctx, userDataAddress, out var directResourceOffsetsAddress))
+        {
+            return false;
+        }
+
+        var resourceOffsets = new ulong[ResourceClassCount];
+        for (var resourceClass = 0; resourceClass < ResourceClassCount; resourceClass++)
+        {
+            if (!TryReadUInt64(
+                    ctx,
+                    userDataAddress + 0x08 + (ulong)(resourceClass * sizeof(ulong)),
+                    out resourceOffsets[resourceClass]))
+            {
+                return false;
+            }
+        }
+
+        if (!TryReadUInt16(ctx, userDataAddress + 0x28, out var extendedUserDataSize) ||
+            !TryReadUInt16(ctx, userDataAddress + 0x2A, out var shaderResourceTableSize) ||
+            !TryReadUInt16(ctx, userDataAddress + 0x2C, out var directResourceCount) ||
+            directResourceCount > MaxMetadataEntries)
+        {
+            return false;
+        }
+
+        var resourceCounts = new ushort[ResourceClassCount];
+        for (var resourceClass = 0; resourceClass < ResourceClassCount; resourceClass++)
+        {
+            if (!TryReadUInt16(
+                    ctx,
+                    userDataAddress + 0x2E + (ulong)(resourceClass * sizeof(ushort)),
+                    out resourceCounts[resourceClass]) ||
+                resourceCounts[resourceClass] > MaxMetadataEntries)
+            {
+                return false;
+            }
+        }
+
+        var directResources = new Dictionary<uint, uint>();
+        if (directResourceCount != 0)
+        {
+            if (directResourceOffsetsAddress == 0)
+            {
+                return false;
+            }
+
+            for (uint type = 0; type < directResourceCount; type++)
+            {
+                if (!TryReadUInt16(ctx, directResourceOffsetsAddress + type * sizeof(ushort), out var offset))
+                {
+                    return false;
+                }
+
+                if (offset != ushort.MaxValue)
+                {
+                    directResources[type] = offset;
+                }
+            }
+        }
+
+        var resources = new List<Gen5ShaderResourceMapping>();
+        for (var resourceClass = 0; resourceClass < ResourceClassCount; resourceClass++)
+        {
+            var count = resourceCounts[resourceClass];
+            if (count == 0)
+            {
+                continue;
+            }
+
+            if (resourceOffsets[resourceClass] == 0)
+            {
+                return false;
+            }
+
+            for (uint slot = 0; slot < count; slot++)
+            {
+                if (!TryReadUInt16(
+                        ctx,
+                        resourceOffsets[resourceClass] + slot * sizeof(ushort),
+                        out var sharp))
+                {
+                    return false;
+                }
+
+                var offset = (uint)(sharp & 0x7FFF);
+                if (offset == 0x7FFF)
+                {
+                    continue;
+                }
+
+                resources.Add(new Gen5ShaderResourceMapping(
+                    (Gen5ShaderResourceKind)resourceClass,
+                    slot,
+                    offset,
+                    (sharp & 0x8000) != 0));
+            }
+        }
+
+        metadata = new Gen5ShaderMetadata(
+            extendedUserDataSize,
+            shaderResourceTableSize,
+            directResources,
+            resources);
+        return true;
+    }
+
+    private static bool TryReadUInt16(CpuContext ctx, ulong address, out ushort value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(ushort)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt16LittleEndian(bytes);
+        return true;
+    }
+
+    private static bool TryReadUInt64(CpuContext ctx, ulong address, out ulong value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(ulong)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt64LittleEndian(bytes);
+        return true;
+    }
+}

src/SharpEmu.Libs/Agc/SpirvFixedShaders.cs

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

src/SharpEmu.Libs/Agc/SpirvModuleBuilder.cs

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

src/SharpEmu.Libs/Ampr/AmprExports.cs

@@ -3,6 +3,7 @@
 
 using SharpEmu.HLE;
 using SharpEmu.Libs.Kernel;
+using System.Buffers;
 using System.Buffers.Binary;
 using System.Collections.Concurrent;
 
@@ -23,6 +24,12 @@ public static class AmprExports
     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
     {
@@ -31,6 +38,23 @@ public static class AmprExports
         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",
@@ -75,12 +99,7 @@ public static class AmprExports
             return (int)OrbisGen2Result.ORBIS_GEN2_OK;
         }
 
-        var buffer = 0UL;
-        var size = 0UL;
-        _ = ctx.TryReadUInt64(commandBuffer + CommandBufferDataOffset, out buffer);
-        _ = ctx.TryReadUInt64(commandBuffer + CommandBufferSizeOffset, out size);
-
-        if (!InitializeCommandBuffer(ctx, commandBuffer, buffer, size, aux0, aux1, clear: false))
+        if (!InitializeCommandBuffer(ctx, commandBuffer, buffer: 0, size: 0, aux0, aux1, clear: false))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
@@ -104,8 +123,9 @@ public static class AmprExports
             return (int)OrbisGen2Result.ORBIS_GEN2_OK;
         }
 
-        if (!ctx.TryWriteUInt64(commandBuffer + CommandBufferAux0Offset, 0) ||
-            !ctx.TryWriteUInt64(commandBuffer + CommandBufferAux1Offset, 0))
+        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;
         }
@@ -179,8 +199,15 @@ public static class AmprExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        if (!ctx.TryReadUInt64(commandBuffer + CommandBufferDataOffset, out var buffer) ||
-            !ctx.TryReadUInt64(commandBuffer + CommandBufferSizeOffset, out var size) ||
+        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;
@@ -240,7 +267,7 @@ public static class AmprExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
-        if (!AmprFileRegistry.TryGetHostPath(fileId, out var hostPath) || !File.Exists(hostPath))
+        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;
@@ -355,24 +382,26 @@ public static class AmprExports
         var commandBuffer = ctx[CpuRegister.Rdi];
         var equeue = ctx[CpuRegister.Rsi];
         var ident = ctx[CpuRegister.Rdx];
-        var filter = ctx[CpuRegister.Rcx];
+        var completionToken = ctx[CpuRegister.Rcx];
         var userData = ctx[CpuRegister.R8];
-        var data = ctx[CpuRegister.R9];
 
         if (commandBuffer == 0)
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        var extra = 0UL;
-        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp] + sizeof(ulong), out extra);
-
-        if (!AppendKernelEventQueueRecord(ctx, commandBuffer, equeue, ident, filter, userData, data, extra))
+        if (!AppendKernelEventQueueRecord(
+                ctx,
+                commandBuffer,
+                equeue,
+                ident,
+                completionToken,
+                userData))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
-        TraceAmpr(ctx, "write_equeue", commandBuffer, equeue, ident);
+        TraceAmpr(ctx, "write_equeue", commandBuffer, ident, completionToken);
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -472,20 +501,34 @@ public static class AmprExports
         ulong aux1,
         bool clear)
     {
+        Span<byte> header = stackalloc byte[CommandBufferHeaderSize];
         if (clear)
         {
-            Span<byte> header = stackalloc byte[CommandBufferHeaderSize];
             header.Clear();
-            if (!ctx.Memory.TryWrite(commandBuffer, header))
+        }
+        else
+        {
+            if (!ctx.Memory.TryRead(commandBuffer, header))
             {
                 return false;
             }
+
+            buffer = BinaryPrimitives.ReadUInt64LittleEndian(header[(int)CommandBufferDataOffset..]);
+            size = BinaryPrimitives.ReadUInt64LittleEndian(header[(int)CommandBufferSizeOffset..]);
         }
 
-        return ctx.TryWriteUInt64(commandBuffer + CommandBufferSelfOffset, commandBuffer) &&
-               ctx.TryWriteUInt64(commandBuffer + CommandBufferAux0Offset, aux0) &&
-               ctx.TryWriteUInt64(commandBuffer + CommandBufferAux1Offset, aux1) &&
-               WriteCommandBufferPointers(ctx, commandBuffer, buffer, size, writeOffset: 0);
+        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)
@@ -500,6 +543,26 @@ public static class AmprExports
             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)
         {
@@ -507,15 +570,6 @@ public static class AmprExports
             state.Size = size;
             state.WriteOffset = writeOffset;
         }
-
-        return true;
-    }
-
-    private static bool WriteVisibleCommandBufferPointers(CpuContext ctx, ulong commandBuffer, ulong buffer, ulong size)
-    {
-        return ctx.TryWriteUInt64(commandBuffer + CommandBufferSelfOffset, commandBuffer) &&
-               ctx.TryWriteUInt64(commandBuffer + CommandBufferDataOffset, buffer) &&
-               ctx.TryWriteUInt64(commandBuffer + CommandBufferSizeOffset, size);
     }
 
     private static bool TryGetCommandBufferState(
@@ -536,9 +590,11 @@ public static class AmprExports
             return true;
         }
 
-        if (ctx.TryReadUInt64(commandBuffer + CommandBufferDataOffset, out buffer) &&
-            ctx.TryReadUInt64(commandBuffer + CommandBufferSizeOffset, out size))
+        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)
             {
@@ -591,23 +647,48 @@ public static class AmprExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        const int ChunkSize = 64 * 1024;
-        var buffer = new byte[(int)Math.Min((ulong)ChunkSize, size)];
+        const int ChunkSize = 1024 * 1024;
+        var buffer = ArrayPool<byte>.Shared.Rent((int)Math.Min((ulong)ChunkSize, size));
 
         try
         {
-            using var stream = new FileStream(hostPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete);
-            if (fileOffset >= (ulong)stream.Length)
+            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;
             }
 
-            stream.Position = unchecked((long)fileOffset);
-
             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);
-                var read = stream.Read(buffer, 0, request);
+                int read;
+                lock (cachedFile.Gate)
+                {
+                    cachedFile.Stream.Position = unchecked((long)absoluteOffset);
+                    read = cachedFile.Stream.Read(buffer, 0, request);
+                }
+
                 if (read <= 0)
                 {
                     break;
@@ -629,10 +710,52 @@ public static class AmprExports
         {
             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,
@@ -659,20 +782,17 @@ public static class AmprExports
         ulong commandBuffer,
         ulong equeue,
         ulong ident,
-        ulong filter,
-        ulong userData,
-        ulong data,
-        ulong extra)
+        ulong completionToken,
+        ulong userData)
     {
         Span<byte> record = stackalloc byte[(int)KernelEventQueueRecordSize];
         record.Clear();
         BinaryPrimitives.WriteUInt32LittleEndian(record[0x00..], KernelEventQueueRecordType);
-        BinaryPrimitives.WriteUInt32LittleEndian(record[0x04..], unchecked((uint)filter));
+        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..], data);
-        BinaryPrimitives.WriteUInt64LittleEndian(record[0x28..], extra);
+        BinaryPrimitives.WriteUInt64LittleEndian(record[0x20..], completionToken);
 
         return AppendCommandBufferRecord(ctx, commandBuffer, record);
     }
@@ -778,7 +898,7 @@ public static class AmprExports
 
     private static void TraceAmpr(CpuContext ctx, string operation, ulong commandBuffer, ulong arg0, ulong arg1)
     {
-        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR"), "1", StringComparison.Ordinal))
+        if (!_traceAmpr)
         {
             return;
         }
@@ -800,7 +920,7 @@ public static class AmprExports
         string? hostPath,
         int result)
     {
-        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR"), "1", StringComparison.Ordinal))
+        if (!_traceAmprReads)
         {
             return;
         }

src/SharpEmu.Libs/AppContent/AppContentExports.cs

@@ -4,6 +4,7 @@
 using SharpEmu.HLE;
 using System.Buffers.Binary;
 using System.Text;
+using System.Text.Json;
 
 namespace SharpEmu.Libs.AppContent;
 
@@ -11,6 +12,8 @@ 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",
@@ -59,6 +62,41 @@ public static class AppContentExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "99b82IKXpH4",
+        ExportName = "sceAppContentAppParamGetInt",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAppContent")]
+    public static int AppContentAppParamGetInt(CpuContext ctx)
+    {
+        var paramId = (uint)ctx[CpuRegister.Rdi];
+        var valueAddress = ctx[CpuRegister.Rsi];
+        if (valueAddress == 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        int value;
+        if (paramId == AppParamSkuFlag)
+        {
+            value = AppParamSkuFlagFull;
+        }
+        else if (!TryReadUserDefinedParam(paramId, out value))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> valueBytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(valueBytes, value);
+        if (!ctx.Memory.TryWrite(valueAddress, valueBytes))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceAppContent($"app_param_get_int id={paramId} value={value}");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
     [SysAbiExport(
         Nid = "buYbeLOGWmA",
         ExportName = "sceAppContentTemporaryDataMount2",
@@ -83,6 +121,69 @@ public static class AppContentExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    private static bool TryReadUserDefinedParam(uint paramId, out int value)
+    {
+        value = 0;
+        if (paramId is < 1 or > 4)
+        {
+            return false;
+        }
+
+        var app0Root = Environment.GetEnvironmentVariable("SHARPEMU_APP0_DIR");
+        if (string.IsNullOrWhiteSpace(app0Root))
+        {
+            return true;
+        }
+
+        var paramJsonPath = Path.Combine(app0Root, "sce_sys", "param.json");
+        if (!File.Exists(paramJsonPath))
+        {
+            return true;
+        }
+
+        try
+        {
+            using var stream = File.OpenRead(paramJsonPath);
+            using var document = JsonDocument.Parse(stream);
+            var propertyName = $"userDefinedParam{paramId}";
+            if (document.RootElement.TryGetProperty(propertyName, out var element) &&
+                element.TryGetInt32(out var parsedValue))
+            {
+                value = parsedValue;
+            }
+
+            return true;
+        }
+        catch (IOException)
+        {
+            return true;
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return true;
+        }
+        catch (JsonException)
+        {
+            return true;
+        }
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
+
+    private static void TraceAppContent(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_APP_CONTENT"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] app_content.{message}");
+    }
+
     private static string ResolveTemp0Root()
     {
         const string temp0VariableName = "SHARPEMU_TEMP0_DIR";

src/SharpEmu.Libs/Audio/AudioOut2Exports.cs

@@ -0,0 +1,231 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Threading;
+
+namespace SharpEmu.Libs.Audio;
+
+public static class AudioOut2Exports
+{
+    private const int AudioOut2ContextParamSize = 0x80;
+    private const int AudioOut2ContextMemorySize = 0x10000;
+    private const int AudioOut2ContextMemoryAlignment = 0x10000;
+    private static long _nextContextHandle = 1;
+    private static long _nextUserHandle = 1;
+    private static int _nextPortId;
+
+    [SysAbiExport(
+        Nid = "g2tViFIohHE",
+        ExportName = "sceAudioOut2Initialize",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2Initialize(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "t5YrizufpQc",
+        ExportName = "sceAudioOut2ContextResetParam",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextResetParam(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        if (paramAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> param = stackalloc byte[AudioOut2ContextParamSize];
+        param.Clear();
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x00..], AudioOut2ContextParamSize);
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x04..], 2);
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x08..], 48000);
+        BinaryPrimitives.WriteUInt32LittleEndian(param[0x0C..], 0x400);
+
+        return ctx.Memory.TryWrite(paramAddress, param)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "pDmme7Bgm6E",
+        ExportName = "sceAudioOut2ContextQueryMemory",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextQueryMemory(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        var memoryInfoAddress = ctx[CpuRegister.Rsi];
+        if (paramAddress == 0 || memoryInfoAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> memoryInfo = stackalloc byte[0x20];
+        memoryInfo.Clear();
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x00..], AudioOut2ContextMemorySize);
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x08..], AudioOut2ContextMemoryAlignment);
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x10..], AudioOut2ContextMemorySize);
+        BinaryPrimitives.WriteUInt64LittleEndian(memoryInfo[0x18..], AudioOut2ContextMemoryAlignment);
+
+        return ctx.Memory.TryWrite(memoryInfoAddress, memoryInfo)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "0x6o1VVAYSY",
+        ExportName = "sceAudioOut2ContextCreate",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextCreate(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        var memoryAddress = ctx[CpuRegister.Rsi];
+        var memorySize = ctx[CpuRegister.Rdx];
+        var outContextAddress = ctx[CpuRegister.Rcx];
+        if (paramAddress == 0 || memoryAddress == 0 || memorySize == 0 || outContextAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = (ulong)Interlocked.Increment(ref _nextContextHandle);
+        return TryWriteUInt64(ctx, outContextAddress, handle)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "on6ZH7Abo10",
+        ExportName = "sceAudioOut2ContextDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2ContextDestroy(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "JK2wamZPzwM",
+        ExportName = "sceAudioOut2PortCreate",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2PortCreate(CpuContext ctx)
+    {
+        var type = unchecked((int)ctx[CpuRegister.Rdi]);
+        var paramAddress = ctx[CpuRegister.Rsi];
+        var outPortAddress = ctx[CpuRegister.Rdx];
+        var contextAddress = ctx[CpuRegister.Rcx];
+        if (type < 0 || type > 255 || paramAddress == 0 || outPortAddress == 0 || contextAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var portId = unchecked((uint)Interlocked.Increment(ref _nextPortId)) & 0xFF;
+        var handle = 0x2000_0000UL | ((ulong)(uint)type << 16) | portId;
+        return TryWriteUInt64(ctx, outPortAddress, handle)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "gatEUKG+Ea4",
+        ExportName = "sceAudioOut2PortGetState",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2PortGetState(CpuContext ctx)
+    {
+        var handle = ctx[CpuRegister.Rdi];
+        var stateAddress = ctx[CpuRegister.Rsi];
+        if (handle == 0 || stateAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var type = (int)((handle >> 16) & 0xFF);
+        Span<byte> state = stackalloc byte[0x20];
+        state.Clear();
+        var output = type == 2 ? 0x40 : 0x01;
+        var channels = type == 2 ? 1 : 2;
+        BinaryPrimitives.WriteUInt16LittleEndian(state[0x00..], unchecked((ushort)output));
+        state[0x02] = unchecked((byte)channels);
+        BinaryPrimitives.WriteInt16LittleEndian(state[0x04..], -1);
+
+        return ctx.Memory.TryWrite(stateAddress, state)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "DImz2Ft9E2g",
+        ExportName = "sceAudioOut2GetSpeakerInfo",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2GetSpeakerInfo(CpuContext ctx)
+    {
+        var infoAddress = ctx[CpuRegister.Rdi];
+        if (infoAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        Span<byte> info = stackalloc byte[0x40];
+        info.Clear();
+        BinaryPrimitives.WriteUInt32LittleEndian(info[0x00..], 1);
+        BinaryPrimitives.WriteUInt32LittleEndian(info[0x04..], 2);
+        BinaryPrimitives.WriteUInt32LittleEndian(info[0x08..], 48000);
+
+        return ctx.Memory.TryWrite(infoAddress, info)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "cd+Rtw+D1x8",
+        ExportName = "sceAudioOut2PortDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2PortDestroy(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "IaZXJ9M79uo",
+        ExportName = "sceAudioOut2UserDestroy",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2UserDestroy(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "xywYcRB7nbQ",
+        ExportName = "sceAudioOut2UserCreate",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut2")]
+    public static int AudioOut2UserCreate(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var outUserAddress = ctx[CpuRegister.Rsi];
+        if ((userId != 0 && userId != 1 && userId != 255) || outUserAddress == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = (ulong)Interlocked.Increment(ref _nextUserHandle);
+        return TryWriteUInt64(ctx, outUserAddress, handle)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static bool TryWriteUInt64(CpuContext ctx, ulong address, ulong value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(ulong)];
+        BinaryPrimitives.WriteUInt64LittleEndian(buffer, value);
+        return ctx.Memory.TryWrite(address, buffer);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/Audio/AudioOutExports.cs

@@ -0,0 +1,92 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Collections.Concurrent;
+using System.Threading;
+
+namespace SharpEmu.Libs.Audio;
+
+public static class AudioOutExports
+{
+    private static readonly ConcurrentDictionary<int, PortState> Ports = new();
+    private static int _nextPortHandle;
+
+    private sealed record PortState(int UserId, int Type, uint BufferLength, uint Frequency, int Format);
+
+    [SysAbiExport(
+        Nid = "JfEPXVxhFqA",
+        ExportName = "sceAudioOutInit",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutInit(CpuContext ctx) => SetReturn(ctx, 0);
+
+    [SysAbiExport(
+        Nid = "ekNvsT22rsY",
+        ExportName = "sceAudioOutOpen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutOpen(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var type = unchecked((int)ctx[CpuRegister.Rsi]);
+        var bufferLength = unchecked((uint)ctx[CpuRegister.Rcx]);
+        var frequency = unchecked((uint)ctx[CpuRegister.R8]);
+        var format = unchecked((int)ctx[CpuRegister.R9]);
+        if (bufferLength == 0 || frequency == 0)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        var handle = Interlocked.Increment(ref _nextPortHandle);
+        Ports[handle] = new PortState(userId, type, bufferLength, frequency, format);
+        return SetReturn(ctx, handle);
+    }
+
+    [SysAbiExport(
+        Nid = "s1--uE9mBFw",
+        ExportName = "sceAudioOutClose",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutClose(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        return SetReturn(
+            ctx,
+            Ports.TryRemove(handle, out _)
+                ? 0
+                : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+    }
+
+    [SysAbiExport(
+        Nid = "QOQtbeDqsT4",
+        ExportName = "sceAudioOutOutput",
+        Target = Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutOutput(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "b+uAV89IlxE",
+        ExportName = "sceAudioOutSetVolume",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceAudioOut")]
+    public static int AudioOutSetVolume(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        return SetReturn(
+            ctx,
+            Ports.ContainsKey(handle)
+                ? 0
+                : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+}

src/SharpEmu.Libs/AvPlayer/AvPlayerExports.cs

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

src/SharpEmu.Libs/CommonDialog/MsgDialogExports.cs

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

src/SharpEmu.Libs/Fiber/FiberExports.cs

@@ -48,15 +48,10 @@ public static class FiberExports
     [ThreadStatic]
     private static ulong _currentFiberAddress;
 
-    [ThreadStatic]
-    private static bool _fiberReturnRequested;
-
-    [ThreadStatic]
-    private static ulong _fiberReturnArgument;
-
+    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();
-    private static readonly ConcurrentDictionary<ulong, FiberRunSession> _runSessions = new();
 
     [SysAbiExport(
         Nid = "hVYD7Ou2pCQ",
@@ -146,6 +141,7 @@ public static class FiberExports
         }
 
         _continuations.TryRemove(fiber, out _);
+        _returnTargets.TryRemove(fiber, out _);
         _stackRanges.TryRemove(fiber, out _);
         _ = TryWriteUInt32(ctx, fiber + FiberStateOffset, FiberStateTerminated);
         return SetReturn(ctx, 0);
@@ -231,43 +227,75 @@ public static class FiberExports
     public static int FiberReturnToThread(CpuContext ctx)
     {
         var fiberAddress = ResolveCurrentFiberAddress(ctx);
-        var inferredFiber = false;
-        if (_currentFiberAddress == 0 && fiberAddress != 0)
-        {
-            inferredFiber = true;
-        }
-
         if (fiberAddress == 0)
         {
             return SetReturn(ctx, FiberErrorPermission);
         }
 
+        if (GuestThreadExecution.Scheduler is not { SupportsGuestContextTransfer: true } ||
+            !GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
+        {
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+
+        var returnArgument = ctx[CpuRegister.Rdi];
         var argOnRunAddress = ctx[CpuRegister.Rsi];
         if (argOnRunAddress != 0 && !TryWriteUInt64(ctx, argOnRunAddress, 0))
         {
             return SetReturn(ctx, FiberErrorInvalid);
         }
 
-        _fiberReturnRequested = true;
-        _fiberReturnArgument = ctx[CpuRegister.Rdi];
-        if (_runSessions.TryGetValue(fiberAddress, out var session))
-        {
-            session.SetReturn(ctx[CpuRegister.Rdi]);
-        }
-
-        if (GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
+        GuestCpuContinuation transferTarget;
+        ulong previousFiber;
+        lock (_fiberGate)
         {
             _continuations[fiberAddress] = new FiberContinuation(
                 CaptureContinuation(ctx, frame.ReturnRip, frame.ResumeRsp, frame.ReturnSlotAddress),
                 argOnRunAddress);
-            TraceFiber($"yield{(inferredFiber ? "-inferred" : string.Empty)} fiber=0x{fiberAddress:X16} resume=0x{frame.ReturnRip:X16} rsp=0x{frame.ResumeRsp:X16} return_slot=0x{frame.ReturnSlotAddress:X16} arg_out=0x{argOnRunAddress:X16}");
-        }
-        else
-        {
-            TraceFiber($"yield-no-frame{(inferredFiber ? "-inferred" : string.Empty)} fiber=0x{fiberAddress:X16} arg_out=0x{argOnRunAddress:X16}");
+
+            if (!_returnTargets.TryRemove(fiberAddress, out var returnTarget))
+            {
+                _continuations.TryRemove(fiberAddress, out _);
+                return SetReturn(ctx, FiberErrorPermission);
+            }
+
+            previousFiber = returnTarget.PreviousFiber;
+            if (previousFiber != 0)
+            {
+                if (!_continuations.TryRemove(previousFiber, out var previousContinuation) ||
+                    !TryWriteResumeArgument(ctx, previousContinuation, returnArgument) ||
+                    !TryWriteUInt32(ctx, previousFiber + FiberStateOffset, FiberStateRun))
+                {
+                    _continuations.TryRemove(fiberAddress, out _);
+                    return SetReturn(ctx, FiberErrorState);
+                }
+
+                transferTarget = previousContinuation.Context with { Rax = 0 };
+            }
+            else
+            {
+                if (!returnTarget.ThreadContinuation.HasValue ||
+                    !TryWriteResumeArgument(ctx, returnTarget.ThreadContinuation.Value, returnArgument))
+                {
+                    _continuations.TryRemove(fiberAddress, out _);
+                    return SetReturn(ctx, FiberErrorState);
+                }
+
+                transferTarget = returnTarget.ThreadContinuation.Value.Context with { Rax = 0 };
+            }
+
+            if (!TryWriteUInt32(ctx, fiberAddress + FiberStateOffset, FiberStateIdle))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
         }
 
-        GuestThreadExecution.RequestCurrentEntryExit("sceFiberReturnToThread", 0);
+        _currentFiberAddress = previousFiber;
+        _ = GuestThreadExecution.EnterFiber(previousFiber);
+        GuestThreadExecution.RequestCurrentContextTransfer(transferTarget);
+        TraceFiber(
+            $"return fiber=0x{fiberAddress:X16} to=0x{previousFiber:X16} " +
+            $"resume=0x{transferTarget.Rip:X16} rsp=0x{transferTarget.Rsp:X16} arg=0x{returnArgument:X16}");
         return SetReturn(ctx, 0);
     }
 
@@ -536,170 +564,152 @@ public static class FiberExports
             }
         }
 
-        if (fields.State != FiberStateIdle)
-        {
-            TraceFiber($"run-state-error reason={reason} fiber=0x{fiber:X16} state=0x{fields.State:X8}");
-            return SetReturn(ctx, FiberErrorState);
-        }
-
         var previousFiber = ResolveCurrentFiberAddress(ctx);
-        var switchingFromFiber = isSwitch && previousFiber != 0 && previousFiber != fiber;
-        if (isSwitch && previousFiber == 0)
+        if ((isSwitch && previousFiber == 0) ||
+            (!isSwitch && previousFiber != 0))
         {
             return SetReturn(ctx, FiberErrorPermission);
         }
-
-        var scheduler = GuestThreadExecution.Scheduler;
-        if (scheduler is null)
-        {
-            return SetReturn(ctx, FiberErrorPermission);
-        }
-
-        var session = new FiberRunSession();
-        var ownsSession = _runSessions.TryAdd(fiber, session);
-        if (!ownsSession && !_runSessions.TryGetValue(fiber, out session))
+        if (previousFiber == fiber)
         {
             return SetReturn(ctx, FiberErrorState);
         }
-
-        FiberContinuation? previousContinuation = null;
-        GuestImportCallFrame switchFrame = default;
-        if (switchingFromFiber)
+        if (GuestThreadExecution.Scheduler is not { SupportsGuestContextTransfer: true } ||
+            !GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
         {
-            if (!GuestThreadExecution.TryGetCurrentImportCallFrame(out switchFrame))
+            return SetReturn(ctx, FiberErrorPermission);
+        }
+
+        GuestCpuContinuation transferTarget;
+        var resumed = false;
+        lock (_fiberGate)
+        {
+            if (!TryReadFiberFields(ctx, fiber, out fields))
             {
-                if (ownsSession)
-                {
-                    _runSessions.TryRemove(fiber, out _);
-                }
-                TraceFiber($"switch-no-frame from=0x{previousFiber:X16} to=0x{fiber:X16} arg_out=0x{outArgumentAddress:X16}");
-                return SetReturn(ctx, FiberErrorPermission);
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+            if (fields.State != FiberStateIdle)
+            {
+                TraceFiber($"run-state-error reason={reason} fiber=0x{fiber:X16} state=0x{fields.State:X8}");
+                return SetReturn(ctx, FiberErrorState);
             }
 
-            previousContinuation = new FiberContinuation(
-                CaptureContinuation(ctx, switchFrame.ReturnRip, switchFrame.ResumeRsp, switchFrame.ReturnSlotAddress),
+            FiberContinuation targetContinuation;
+            if (_continuations.TryGetValue(fiber, out var savedContinuation))
+            {
+                targetContinuation = savedContinuation;
+                resumed = true;
+            }
+            else if (!TryCreateInitialContinuation(ctx, fields, argOnRun, out targetContinuation))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+
+            if (resumed && !TryWriteResumeArgument(ctx, targetContinuation, argOnRun))
+            {
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+
+            var callerContinuation = new FiberContinuation(
+                CaptureContinuation(ctx, frame.ReturnRip, frame.ResumeRsp, frame.ReturnSlotAddress),
                 outArgumentAddress);
-        }
 
-        if (!TryWriteUInt32(ctx, fiber + FiberStateOffset, FiberStateRun))
-        {
-            if (ownsSession)
+            if (previousFiber != 0)
             {
-                _runSessions.TryRemove(fiber, out _);
-            }
-            return SetReturn(ctx, FiberErrorInvalid);
-        }
-
-        if (switchingFromFiber && !TryWriteUInt32(ctx, previousFiber + FiberStateOffset, FiberStateIdle))
-        {
-            _ = TryWriteUInt32(ctx, fiber + FiberStateOffset, FiberStateIdle);
-            if (ownsSession)
-            {
-                _runSessions.TryRemove(fiber, out _);
-            }
-            return SetReturn(ctx, FiberErrorInvalid);
-        }
-
-        if (previousContinuation.HasValue)
-        {
-            _continuations[previousFiber] = previousContinuation.Value;
-            TraceFiber($"switch-save from=0x{previousFiber:X16} to=0x{fiber:X16} resume=0x{switchFrame.ReturnRip:X16} rsp=0x{switchFrame.ResumeRsp:X16} return_slot=0x{switchFrame.ReturnSlotAddress:X16} arg_out=0x{outArgumentAddress:X16}");
-        }
-
-        var previousReturnRequested = _fiberReturnRequested;
-        var previousReturnArgument = _fiberReturnArgument;
-        _currentFiberAddress = fiber;
-        _fiberReturnRequested = false;
-        _fiberReturnArgument = 0;
-        var previousExecutionFiber = GuestThreadExecution.EnterFiber(fiber);
-        TraceFiber($"run-enter reason={reason} fiber=0x{fiber:X16} prev=0x{previousFiber:X16} thread=0x{GuestThreadExecution.CurrentGuestThreadHandle:X16} managed={Environment.CurrentManagedThreadId} stack=0x{fields.ContextAddress:X16}");
-
-        var hasContinuation = _continuations.TryGetValue(fiber, out var continuation);
-        if (hasContinuation)
-        {
-            _continuations.TryRemove(fiber, out _);
-        }
-
-        TraceFiber(hasContinuation
-            ? $"run-dispatch reason={reason} fiber=0x{fiber:X16} resume=1 rip=0x{continuation.Context.Rip:X16} rsp=0x{continuation.Context.Rsp:X16} return_slot=0x{continuation.Context.ReturnSlotAddress:X16} arg_out=0x{continuation.ArgOnRunAddress:X16}"
-            : $"run-dispatch reason={reason} fiber=0x{fiber:X16} resume=0 rip=0x{fields.Entry:X16} rsp=0x{fields.ContextAddress + fields.ContextSize:X16} arg_out=0x{outArgumentAddress:X16}");
-        bool callbackOk;
-        string? callbackError;
-        try
-        {
-            if (hasContinuation)
-            {
-                if (continuation.ArgOnRunAddress != 0 &&
-                    !TryWriteUInt64(ctx, continuation.ArgOnRunAddress, argOnRun))
+                if (!TryReadUInt32(ctx, previousFiber + FiberStateOffset, out var previousState) ||
+                    previousState != FiberStateRun ||
+                    !TryWriteUInt32(ctx, previousFiber + FiberStateOffset, FiberStateIdle))
                 {
-                    callbackOk = false;
-                    callbackError = $"failed to write resumed argOnRun to 0x{continuation.ArgOnRunAddress:X16}";
-                }
-                else
-                {
-                    callbackOk = scheduler.TryCallGuestContinuation(
-                        ctx,
-                        continuation.Context,
-                        reason,
-                        out callbackError);
+                    return SetReturn(ctx, FiberErrorState);
                 }
+
+                _continuations[previousFiber] = callerContinuation;
+                _returnTargets[fiber] = new FiberReturnTarget(previousFiber, null);
             }
             else
             {
-                callbackOk = scheduler.TryCallGuestFunction(
-                    ctx,
-                    fields.Entry,
-                    fields.ArgOnInitialize,
-                    argOnRun,
-                    fields.ContextAddress,
-                    fields.ContextSize,
-                    reason,
-                    out callbackError);
+                _returnTargets[fiber] = new FiberReturnTarget(0, callerContinuation);
             }
-        }
-        finally
-        {
-            GuestThreadExecution.RestoreFiber(previousExecutionFiber);
+
+            if (!TryWriteUInt32(ctx, fiber + FiberStateOffset, FiberStateRun))
+            {
+                if (previousFiber != 0)
+                {
+                    _continuations.TryRemove(previousFiber, out _);
+                    _ = TryWriteUInt32(ctx, previousFiber + FiberStateOffset, FiberStateRun);
+                }
+                _returnTargets.TryRemove(fiber, out _);
+                return SetReturn(ctx, FiberErrorInvalid);
+            }
+
+            if (resumed)
+            {
+                _continuations.TryRemove(fiber, out _);
+            }
+
+            transferTarget = targetContinuation.Context with { Rax = 0 };
         }
 
-        var returnRequested = _fiberReturnRequested;
-        var returnArgument = _fiberReturnArgument;
-        if (!returnRequested && session.TryGetReturn(out var sessionReturnArgument))
-        {
-            returnRequested = true;
-            returnArgument = sessionReturnArgument;
-        }
-
-        if (ownsSession)
-        {
-            _runSessions.TryRemove(fiber, out _);
-        }
-
-        _currentFiberAddress = previousFiber;
-        _fiberReturnRequested = previousReturnRequested;
-        _fiberReturnArgument = previousReturnArgument;
-
-        _ = TryWriteUInt32(ctx, fiber + FiberStateOffset, FiberStateIdle);
-        if (switchingFromFiber)
-        {
-            _ = TryWriteUInt32(ctx, previousFiber + FiberStateOffset, FiberStateRun);
-        }
-
-        if (!callbackOk)
-        {
-            TraceFiber($"run-failed fiber=0x{fiber:X16} entry=0x{fields.Entry:X16} error={callbackError}");
-            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_CPU_TRAP);
-        }
-
-        if (outArgumentAddress != 0 && !TryWriteUInt64(ctx, outArgumentAddress, returnArgument))
-        {
-            return SetReturn(ctx, FiberErrorInvalid);
-        }
-
-        TraceFiber($"run fiber=0x{fiber:X16} entry=0x{fields.Entry:X16} resume={hasContinuation} arg=0x{argOnRun:X16} ret=0x{returnArgument:X16}");
+        _currentFiberAddress = fiber;
+        _ = GuestThreadExecution.EnterFiber(fiber);
+        GuestThreadExecution.RequestCurrentContextTransfer(transferTarget);
+        TraceFiber(
+            $"transfer reason={reason} from=0x{previousFiber:X16} to=0x{fiber:X16} resume={resumed} " +
+            $"rip=0x{transferTarget.Rip:X16} rsp=0x{transferTarget.Rsp:X16} arg=0x{argOnRun:X16}");
         return SetReturn(ctx, 0);
     }
 
+    private static bool TryCreateInitialContinuation(
+        CpuContext ctx,
+        FiberFields fields,
+        ulong argOnRun,
+        out FiberContinuation continuation)
+    {
+        continuation = default;
+        if (fields.ContextAddress == 0 || fields.ContextSize < FiberContextMinimumSize)
+        {
+            return false;
+        }
+
+        var stackEnd = fields.ContextAddress + fields.ContextSize;
+        var entryRsp = (stackEnd & ~15UL) - sizeof(ulong);
+        if (!TryWriteUInt64(ctx, 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 ||
+        TryWriteUInt64(ctx, continuation.ArgOnRunAddress, argument);
+
     private static GuestCpuContinuation CaptureContinuation(
         CpuContext ctx,
         ulong resumeRip,
@@ -1007,30 +1017,9 @@ public static class FiberExports
         GuestCpuContinuation Context,
         ulong ArgOnRunAddress);
 
-    private sealed class FiberRunSession
-    {
-        private int _returnRequested;
-
-        private ulong _returnArgument;
-
-        public void SetReturn(ulong argument)
-        {
-            _returnArgument = argument;
-            Volatile.Write(ref _returnRequested, 1);
-        }
-
-        public bool TryGetReturn(out ulong argument)
-        {
-            if (Volatile.Read(ref _returnRequested) == 0)
-            {
-                argument = 0;
-                return false;
-            }
-
-            argument = _returnArgument;
-            return true;
-        }
-    }
+    private readonly record struct FiberReturnTarget(
+        ulong PreviousFiber,
+        FiberContinuation? ThreadContinuation);
 
     private readonly record struct FiberStackRange(ulong Start, ulong Size)
     {

src/SharpEmu.Libs/Kernel/KernelAprCompatExports.cs

@@ -11,8 +11,13 @@ namespace SharpEmu.Libs.Kernel;
 
 public static class KernelAprCompatExports
 {
-    private static readonly ConcurrentDictionary<uint, ulong> _submittedCommandBuffers = new();
+    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",
@@ -37,7 +42,7 @@ public static class KernelAprCompatExports
             submissionId = unchecked((uint)Interlocked.Increment(ref _nextSubmissionId));
         }
 
-        _submittedCommandBuffers[submissionId] = commandBuffer;
+        _submittedCommandBuffers[submissionId] = new AprSubmission(commandBuffer, priority, resultAddress);
 
         var completionResult = AmprExports.CompleteCommandBuffer(ctx, commandBuffer);
         if (completionResult != (int)OrbisGen2Result.ORBIS_GEN2_OK)
@@ -67,20 +72,23 @@ public static class KernelAprCompatExports
     public static int KernelAprWaitCommandBuffer(CpuContext ctx)
     {
         var submissionId = unchecked((uint)ctx[CpuRegister.Rdi]);
-        var priority = ctx[CpuRegister.Rsi];
-        var resultAddress = ctx[CpuRegister.Rdx];
+        var waitArg1 = ctx[CpuRegister.Rsi];
+        var waitArg2 = ctx[CpuRegister.Rdx];
 
-        if (!_submittedCommandBuffers.TryRemove(submissionId, out var commandBuffer))
+        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, commandBuffer, priority, resultAddress);
+        TraceApr(ctx, "wait", submissionId, submission.CommandBuffer, waitArg1, resultAddress);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -98,7 +106,7 @@ public static class KernelAprCompatExports
         }
 
         var submissionId = unchecked((uint)Interlocked.Increment(ref _nextSubmissionId));
-        _submittedCommandBuffers[submissionId] = commandBuffer;
+        _submittedCommandBuffers[submissionId] = new AprSubmission(commandBuffer, ctx[CpuRegister.Rsi], ResultAddress: 0);
 
         var completionResult = AmprExports.CompleteCommandBuffer(ctx, commandBuffer);
         if (completionResult != (int)OrbisGen2Result.ORBIS_GEN2_OK)
@@ -125,7 +133,7 @@ public static class KernelAprCompatExports
         }
 
         var submissionId = unchecked((uint)Interlocked.Increment(ref _nextSubmissionId));
-        _submittedCommandBuffers[submissionId] = commandBuffer;
+        _submittedCommandBuffers[submissionId] = new AprSubmission(commandBuffer, ctx[CpuRegister.Rsi], ResultAddress: 0);
 
         var completionResult = AmprExports.CompleteCommandBuffer(ctx, commandBuffer);
         if (completionResult != (int)OrbisGen2Result.ORBIS_GEN2_OK)
@@ -149,6 +157,27 @@ public static class KernelAprCompatExports
         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 bool TryWriteUInt32(CpuContext ctx, ulong address, uint value)
     {
         Span<byte> buffer = stackalloc byte[sizeof(uint)];
@@ -164,7 +193,7 @@ public static class KernelAprCompatExports
         ulong priority,
         ulong aux)
     {
-        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_AMPR"), "1", StringComparison.Ordinal))
+        if (!_traceApr)
         {
             return;
         }
@@ -181,4 +210,46 @@ public static class KernelAprCompatExports
                 $"[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

@@ -127,6 +127,7 @@ public static class KernelEventFlagCompatExports
             TraceEventFlag($"set handle=0x{handle:X16} pattern=0x{pattern:X16} bits=0x{state.Bits:X16} ret=0x{returnRip:X16}");
         }
 
+        _ = GuestThreadExecution.Scheduler?.WakeBlockedThreads(GetEventFlagWakeKey(handle));
         return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
     }
 
@@ -226,7 +227,7 @@ public static class KernelEventFlagCompatExports
         Monitor.Enter(state.Gate);
         try
         {
-            if (TryCompleteSatisfiedWait(ctx, state, pattern, waitMode, out var immediateWaitResult))
+            if (TryCompleteSatisfiedWait(ctx, state, pattern, waitMode, resultAddress, out var immediateWaitResult))
             {
                 return SetReturn(ctx, immediateWaitResult);
             }
@@ -242,7 +243,28 @@ public static class KernelEventFlagCompatExports
             var currentGuestThread = GuestThreadExecution.CurrentGuestThreadHandle;
             var currentFiber = FiberExports.GetCurrentFiberAddressForDiagnostics(ctx);
             var managedThread = Environment.CurrentManagedThreadId;
-            var requestedBlock = GuestThreadExecution.RequestCurrentThreadBlock("sceKernelWaitEventFlag");
+            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)
@@ -270,7 +292,7 @@ public static class KernelEventFlagCompatExports
                             Monitor.Enter(state.Gate);
                         }
 
-                        if (TryCompleteSatisfiedWait(ctx, state, pattern, waitMode, out var pumpedWaitResult))
+                        if (TryCompleteSatisfiedWait(ctx, state, pattern, waitMode, resultAddress, out var pumpedWaitResult))
                         {
                             state.WaitingThreads = Math.Max(0, state.WaitingThreads - 1);
                             releaseWaiter = false;
@@ -369,19 +391,21 @@ public static class KernelEventFlagCompatExports
     }
 
     private static bool TryCompleteSatisfiedWait(
-        CpuContext ctx,
-        EventFlagState state,
-        ulong pattern,
-        uint waitMode,
-        out OrbisGen2Result result)
+    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, ctx[CpuRegister.Rcx], state.Bits))
+        if (!TryWriteResultPattern(ctx, resultAddress, state.Bits))
         {
             result = OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
             return true;
@@ -391,6 +415,41 @@ public static class KernelEventFlagCompatExports
         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);
 

src/SharpEmu.Libs/Kernel/KernelEventQueueCompatExports.cs

@@ -10,10 +10,14 @@ 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(
@@ -24,6 +28,11 @@ public static class KernelEventQueueCompatExports
         ulong Data,
         ulong UserData);
 
+    private readonly record struct KernelEventRegistration(
+        ulong Ident,
+        short Filter,
+        ulong UserData);
+
     [SysAbiExport(
         Nid = "D0OdFMjp46I",
         ExportName = "sceKernelCreateEqueue",
@@ -42,6 +51,7 @@ public static class KernelEventQueueCompatExports
         {
             _eventQueues.Add(handle);
             _pendingEvents[handle] = new LinkedList<KernelQueuedEvent>();
+            _registeredEvents[handle] = new Dictionary<(ulong Ident, short Filter), KernelEventRegistration>();
         }
 
         if (!ctx.TryWriteUInt64(outAddress, handle))
@@ -65,6 +75,7 @@ public static class KernelEventQueueCompatExports
         {
             _eventQueues.Remove(handle);
             _pendingEvents.Remove(handle);
+            _registeredEvents.Remove(handle);
         }
 
         TraceEventQueue(ctx, "delete", handle);
@@ -122,8 +133,16 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelAddAmprEvent(CpuContext ctx)
     {
-        TraceEventQueue(ctx, "add_ampr", ctx[CpuRegister.Rdi]);
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        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(
@@ -133,8 +152,16 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelAddAmprSystemEvent(CpuContext ctx)
     {
-        TraceEventQueue(ctx, "add_ampr_system", ctx[CpuRegister.Rdi]);
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        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(
@@ -144,8 +171,15 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelDeleteAmprEvent(CpuContext ctx)
     {
-        TraceEventQueue(ctx, "delete_ampr", ctx[CpuRegister.Rdi]);
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        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(
@@ -155,8 +189,15 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelDeleteAmprSystemEvent(CpuContext ctx)
     {
-        TraceEventQueue(ctx, "delete_ampr_system", ctx[CpuRegister.Rdi]);
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        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(
@@ -171,6 +212,57 @@ public static class KernelEventQueueCompatExports
         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",
@@ -184,6 +276,22 @@ public static class KernelEventQueueCompatExports
         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 && !TryReadUInt32(ctx, timeoutAddress, out timeoutUsec))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
         var deliveredCount = DequeueEvents(ctx, handle, eventsAddress, eventCapacity);
         if (outCountAddress != 0 && !TryWriteUInt32(ctx, outCountAddress, (uint)deliveredCount))
         {
@@ -196,12 +304,53 @@ public static class KernelEventQueueCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_OK;
         }
 
-        if (timeoutAddress == 0 && GuestThreadExecution.RequestCurrentThreadBlock("sceKernelWaitEqueue"))
+        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 && !TryWriteUInt32(ctx, 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;
     }
@@ -216,6 +365,7 @@ public static class KernelEventQueueCompatExports
 
     public static bool EnqueueEvent(ulong handle, KernelQueuedEvent queuedEvent)
     {
+        var queued = false;
         lock (_eventQueueGate)
         {
             if (!_eventQueues.Contains(handle))
@@ -230,10 +380,101 @@ public static class KernelEventQueueCompatExports
             }
 
             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,
@@ -241,6 +482,7 @@ public static class KernelEventQueueCompatExports
         ulong eventHint,
         ulong userData)
     {
+        var triggered = false;
         lock (_eventQueueGate)
         {
             if (!_eventQueues.Contains(handle))
@@ -254,17 +496,8 @@ public static class KernelEventQueueCompatExports
                 _pendingEvents[handle] = events;
             }
 
-            LinkedListNode<KernelQueuedEvent>? pendingNode = null;
-            for (var node = events.First; node is not null; node = node.Next)
-            {
-                if (node.Value.Ident == ident && node.Value.Filter == filter)
-                {
-                    pendingNode = node;
-                    break;
-                }
-            }
-
             var count = 1UL;
+            var pendingNode = FindPendingEvent(events, ident, filter);
             if (pendingNode is not null)
             {
                 count = Math.Min(((pendingNode.Value.Data >> 12) & 0xFUL) + 1, 0xFUL);
@@ -289,8 +522,82 @@ public static class KernelEventQueueCompatExports
                 events.AddLast(triggeredEvent);
             }
 
-            return true;
+            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 && !TryWriteUInt32(ctx, 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)
@@ -359,4 +666,17 @@ public static class KernelEventQueueCompatExports
         BinaryPrimitives.WriteUInt32LittleEndian(buffer, value);
         return ctx.Memory.TryWrite(address, buffer);
     }
+
+    private static bool TryReadUInt32(CpuContext ctx, ulong address, out uint value)
+    {
+        Span<byte> buffer = stackalloc byte[sizeof(uint)];
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt32LittleEndian(buffer);
+        return true;
+    }
 }

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

@@ -204,6 +204,16 @@ public static class KernelExports
         var nameAddress = ctx[CpuRegister.R8];
         var name = nameAddress == 0 ? string.Empty : ReadCString(ctx, nameAddress, 256);
         var threadHandle = KernelPthreadState.CreateThreadHandle(name);
+        KernelPthreadExtendedCompatExports.GetThreadStartScheduling(
+            ctx,
+            attrAddress,
+            out var priority,
+            out var affinityMask);
+        KernelPthreadExtendedCompatExports.RegisterThreadStart(
+            threadHandle,
+            name,
+            priority,
+            affinityMask);
         if (threadIdAddress != 0 && !ctx.TryWriteUInt64(threadIdAddress, threadHandle))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -212,13 +222,22 @@ public static class KernelExports
         if (ShouldTracePthread())
         {
             Console.Error.WriteLine(
-                $"[LOADER][TRACE] pthread_create: out=0x{threadIdAddress:X16} attr=0x{attrAddress:X16} entry=0x{entryAddress:X16} arg=0x{argument:X16} name_ptr=0x{nameAddress:X16} name='{name}' -> thread=0x{threadHandle:X16}");
+                $"[LOADER][TRACE] pthread_create: out=0x{threadIdAddress:X16} attr=0x{attrAddress:X16} " +
+                $"entry=0x{entryAddress:X16} arg=0x{argument:X16} name_ptr=0x{nameAddress:X16} " +
+                $"name='{name}' priority={priority} affinity=0x{affinityMask:X} -> thread=0x{threadHandle:X16}");
         }
 
         var scheduler = GuestThreadExecution.Scheduler;
         if (scheduler is not null && entryAddress != 0)
         {
-            var request = new GuestThreadStartRequest(threadHandle, entryAddress, argument, attrAddress, name);
+            var request = new GuestThreadStartRequest(
+                threadHandle,
+                entryAddress,
+                argument,
+                attrAddress,
+                name,
+                priority,
+                affinityMask);
             if (!scheduler.TryStartThread(ctx, request, out var error))
             {
                 Console.Error.WriteLine(
@@ -252,6 +271,32 @@ public static class KernelExports
         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",
@@ -261,10 +306,6 @@ public static class KernelExports
     {
         var threadId = ctx[CpuRegister.Rdi];
         var returnValueAddress = ctx[CpuRegister.Rsi];
-        if (returnValueAddress != 0 && !ctx.TryWriteUInt64(returnValueAddress, 0))
-        {
-            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
-        }
 
         if (ShouldTracePthread())
         {
@@ -272,6 +313,30 @@ public static class KernelExports
                 $"[LOADER][TRACE] pthread_join: thread=0x{threadId:X16} retval_out=0x{returnValueAddress:X16}");
         }
 
+        var returnValue = 0UL;
+        if (GuestThreadExecution.Scheduler is { } scheduler &&
+            !scheduler.TryJoinThread(ctx, threadId, out returnValue, out var error))
+        {
+            Console.Error.WriteLine(
+                $"[LOADER][ERROR] pthread_join: thread=0x{threadId:X16}: {error}");
+            var result = string.Equals(
+                error,
+                "thread cannot join itself",
+                StringComparison.Ordinal)
+                ? OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT
+                : OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+            return (int)result;
+        }
+
+        if (returnValueAddress != 0 &&
+            !ctx.TryWriteUInt64(returnValueAddress, returnValue))
+        {
+            ctx[CpuRegister.Rax] =
+                unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -300,6 +365,13 @@ public static class KernelExports
         LibraryName = "libKernel")]
     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",
         ExportName = "printf",

src/SharpEmu.Libs/Kernel/KernelPthreadCompatExports.cs

@@ -1,7 +1,9 @@
 // Copyright (C) 2026 SharpEmu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+using System.Collections.Concurrent;
 using SharpEmu.HLE;
+using System.Buffers.Binary;
 using System.Threading;
 using System.Diagnostics.CodeAnalysis;
 
@@ -9,7 +11,6 @@ namespace SharpEmu.Libs.Kernel;
 
 public static class KernelPthreadCompatExports
 {
-    private const int MutexTypeDefault = 1;
     private const int MutexTypeErrorCheck = 1;
     private const int MutexTypeRecursive = 2;
     private const int MutexTypeNormal = 3;
@@ -19,22 +20,39 @@ public static class KernelPthreadCompatExports
     private const int MutexAttrObjectSize = 0x40;
     private const int CondObjectSize = 0x100;
     private const int DefaultSpuriousCondWakeMilliseconds = 1;
+    private const int PthreadOnceUninitialized = 0;
+    private const int PthreadOnceInProgress = 1;
+    private const int PthreadOnceDone = 2;
 
     private static readonly object _stateGate = new();
-    private static readonly Dictionary<ulong, PthreadMutexState> _mutexStates = new();
+    private static readonly ConcurrentDictionary<ulong, PthreadMutexState> _mutexStates = new();
     private static readonly Dictionary<ulong, PthreadMutexAttrState> _mutexAttrStates = new();
     private static readonly Dictionary<ulong, PthreadCondState> _condStates = new();
+    private static readonly Dictionary<ulong, object> _onceGates = new();
     private static readonly HashSet<ulong> _condAttrStates = new();
+    private static readonly bool _tracePthreads =
+        string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PTHREADS"), "1", StringComparison.Ordinal);
+    private static readonly bool _tracePthreadConds =
+        _tracePthreads ||
+        string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PTHREAD_CONDS"), "1", StringComparison.Ordinal);
+    private static readonly HashSet<ulong>? _tracePthreadMutexFilter = ParseTraceAddressFilter(
+        Environment.GetEnvironmentVariable("SHARPEMU_LOG_PTHREAD_MUTEX_FILTER"));
 
     private sealed class PthreadMutexState
     {
         public SemaphoreSlim Semaphore { get; } = new(1, 1);
         public ulong OwnerThreadId { get; set; }
         public int RecursionCount { get; set; }
-        public int Type { get; set; } = MutexTypeDefault;
+        public int Type { get; set; } = MutexTypeErrorCheck;
         public int Protocol { get; set; }
     }
 
+    private sealed class PthreadMutexWaiter
+    {
+        public required ulong ThreadId { get; init; }
+        public int Reserved;
+    }
+
     private sealed class PthreadCondState
     {
         public object SyncRoot { get; } = new();
@@ -57,6 +75,13 @@ public static class KernelPthreadCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "EotR8a3ASf4",
+        ExportName = "pthread_self",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PosixPthreadSelf(CpuContext ctx) => PthreadSelf(ctx);
+
     [SysAbiExport(
         Nid = "3PtV6p3QNX4",
         ExportName = "scePthreadEqual",
@@ -70,6 +95,13 @@ public static class KernelPthreadCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "7Xl257M4VNI",
+        ExportName = "pthread_equal",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int PosixPthreadEqual(CpuContext ctx) => PthreadEqual(ctx);
+
     [SysAbiExport(
         Nid = "T72hz6ffq08",
         ExportName = "scePthreadYield",
@@ -340,6 +372,93 @@ public static class KernelPthreadCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "14bOACANTBo",
+        ExportName = "scePthreadOnce",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadOnce(CpuContext ctx)
+    {
+        var onceAddress = ctx[CpuRegister.Rdi];
+        var initRoutine = ctx[CpuRegister.Rsi];
+        if (onceAddress == 0 || initRoutine == 0)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        if (!TryReadInt32(ctx, onceAddress, out var onceValue))
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        if (onceValue == PthreadOnceDone)
+        {
+            return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+        }
+
+        var gate = GetPthreadOnceGate(onceAddress);
+        var shouldCall = false;
+        lock (gate)
+        {
+            if (!TryReadInt32(ctx, onceAddress, out onceValue))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            while (onceValue == PthreadOnceInProgress)
+            {
+                Monitor.Wait(gate, TimeSpan.FromMilliseconds(1));
+                if (!TryReadInt32(ctx, onceAddress, out onceValue))
+                {
+                    return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+            }
+
+            if (onceValue != PthreadOnceDone)
+            {
+                if (!TryWriteInt32(ctx, onceAddress, PthreadOnceInProgress))
+                {
+                    return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+
+                shouldCall = true;
+            }
+        }
+
+        if (shouldCall)
+        {
+            var scheduler = GuestThreadExecution.Scheduler;
+            string? error = null;
+            if (scheduler is null ||
+                !scheduler.TryCallGuestFunction(ctx, initRoutine, 0, 0, 0, 0, "pthread_once", out error))
+            {
+                lock (gate)
+                {
+                    _ = TryWriteInt32(ctx, onceAddress, PthreadOnceUninitialized);
+                    Monitor.PulseAll(gate);
+                }
+
+                TracePthreadOnce(onceAddress, initRoutine, "failed", error);
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN);
+            }
+
+            lock (gate)
+            {
+                if (!TryWriteInt32(ctx, onceAddress, PthreadOnceDone))
+                {
+                    _ = TryWriteInt32(ctx, onceAddress, PthreadOnceUninitialized);
+                    Monitor.PulseAll(gate);
+                    return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+
+                Monitor.PulseAll(gate);
+            }
+        }
+
+        TracePthreadOnce(onceAddress, initRoutine, shouldCall ? "call" : "done", null);
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
     private static int PthreadMutexInitCore(CpuContext ctx, ulong mutexAddress, ulong attrAddress)
     {
         if (mutexAddress == 0)
@@ -364,19 +483,13 @@ public static class KernelPthreadCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
-        lock (_stateGate)
-        {
-            _mutexStates[mutexAddress] = state;
-            _mutexStates[handle] = state;
-        }
+        _mutexStates[mutexAddress] = state;
+        _mutexStates[handle] = state;
 
-        if (!ctx.TryWriteUInt64(mutexAddress, handle))
+        if (!KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, mutexAddress, handle))
         {
-            lock (_stateGate)
-            {
-                _mutexStates.Remove(mutexAddress);
-                _mutexStates.Remove(handle);
-            }
+            _mutexStates.TryRemove(mutexAddress, out _);
+            _mutexStates.TryRemove(handle, out _);
 
             state.Semaphore.Dispose();
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -393,15 +506,10 @@ public static class KernelPthreadCompatExports
         }
 
         var resolvedAddress = ResolveMutexHandle(ctx, mutexAddress);
-        PthreadMutexState? state;
-        lock (_stateGate)
+        _mutexStates.TryRemove(resolvedAddress, out var state);
+        if (resolvedAddress != mutexAddress)
         {
-            _mutexStates.TryGetValue(resolvedAddress, out state);
-            _mutexStates.Remove(resolvedAddress);
-            if (resolvedAddress != mutexAddress)
-            {
-                _mutexStates.Remove(mutexAddress);
-            }
+            _mutexStates.TryRemove(mutexAddress, out _);
         }
 
         if (state is null)
@@ -409,7 +517,7 @@ public static class KernelPthreadCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
-        _ = ctx.TryWriteUInt64(mutexAddress, 0);
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, mutexAddress, 0);
         state.Semaphore.Dispose();
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -464,15 +572,33 @@ public static class KernelPthreadCompatExports
             }
         }
 
-        var acquired = true;
-        if (tryOnly)
+        var acquired = state.Semaphore.Wait(0);
+        if (!acquired)
         {
-            acquired = state.Semaphore.Wait(0);
-        }
-        else
-        {
-            state.Semaphore.Wait();
+            // Guest-thread blocking for pthread_mutex_lock is currently disabled.
+            // Demon's Souls deadlocks during PS5SyncEvent initialization.
+            /* var waiter = new PthreadMutexWaiter { ThreadId = currentThreadId };
+            if (!tryOnly &&
+                GuestThreadExecution.IsGuestThread &&
+                GuestThreadExecution.TryGetCurrentImportCallFrame(out _) &&
+                GuestThreadExecution.RequestCurrentThreadBlock(
+                    ctx,
+                    "pthread_mutex_lock",
+                    GetMutexWakeKey(resolvedAddress),
+                    () => CompleteBlockedMutexLock(ctx, mutexAddress, resolvedAddress, state, waiter),
+                    () => TryReserveBlockedMutexLock(ctx, mutexAddress, resolvedAddress, state, waiter)))
+            {
+                TracePthreadMutex(ctx, "lock-block", mutexAddress, resolvedAddress, state, currentThreadId, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+                return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+            } */
+
+            if (!tryOnly)
+            {
+                state.Semaphore.Wait();
+                acquired = true;
+            }
         }
+
         if (!acquired)
         {
             TracePthreadMutex(ctx, tryOnly ? "trylock" : "lock", mutexAddress, resolvedAddress, state, currentThreadId, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY);
@@ -531,6 +657,7 @@ public static class KernelPthreadCompatExports
             try
             {
                 state.Semaphore.Release();
+                _ = GuestThreadExecution.Scheduler?.WakeBlockedThreads(GetMutexWakeKey(resolvedAddress), 1);
             }
             catch (SemaphoreFullException)
             {
@@ -555,7 +682,7 @@ public static class KernelPthreadCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
-        var initialState = new PthreadMutexAttrState(MutexTypeDefault, 0);
+        var initialState = new PthreadMutexAttrState(MutexTypeErrorCheck, 0);
         if (!WriteMutexAttrObject(ctx, handle, initialState))
         {
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -567,7 +694,7 @@ public static class KernelPthreadCompatExports
             _mutexAttrStates[handle] = initialState;
         }
 
-        if (!ctx.TryWriteUInt64(attrAddress, handle))
+        if (!KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, attrAddress, handle))
         {
             lock (_stateGate)
             {
@@ -614,7 +741,7 @@ public static class KernelPthreadCompatExports
         {
             if (!_mutexAttrStates.TryGetValue(resolvedAddress, out var state))
             {
-                state = new PthreadMutexAttrState(MutexTypeDefault, 0);
+                state = new PthreadMutexAttrState(MutexTypeErrorCheck, 0);
             }
 
             updatedState = state with { Type = NormalizeMutexType(type) };
@@ -643,7 +770,7 @@ public static class KernelPthreadCompatExports
         {
             if (!_mutexAttrStates.TryGetValue(resolvedAddress, out var state))
             {
-                state = new PthreadMutexAttrState(MutexTypeDefault, 0);
+                state = new PthreadMutexAttrState(MutexTypeErrorCheck, 0);
             }
 
             updatedState = state with { Protocol = protocol };
@@ -666,22 +793,16 @@ public static class KernelPthreadCompatExports
             return 0;
         }
 
-        lock (_stateGate)
+        if (_mutexStates.ContainsKey(mutexAddress))
         {
-            if (_mutexStates.ContainsKey(mutexAddress))
-            {
-                return mutexAddress;
-            }
+            return mutexAddress;
         }
 
-        if (ctx.TryReadUInt64(mutexAddress, out var pointedHandle) && pointedHandle != 0)
+        if (KernelMemoryCompatExports.TryReadUInt64Compat(ctx, mutexAddress, out var pointedHandle) && pointedHandle != 0)
         {
-            lock (_stateGate)
+            if (_mutexStates.ContainsKey(pointedHandle))
             {
-                if (_mutexStates.ContainsKey(pointedHandle))
-                {
-                    return pointedHandle;
-                }
+                return pointedHandle;
             }
         }
 
@@ -697,16 +818,13 @@ public static class KernelPthreadCompatExports
             return false;
         }
 
-        lock (_stateGate)
+        if (_mutexStates.TryGetValue(mutexAddress, out state))
         {
-            if (_mutexStates.TryGetValue(mutexAddress, out state))
-            {
-                resolvedAddress = mutexAddress;
-                return true;
-            }
+            resolvedAddress = mutexAddress;
+            return true;
         }
 
-        if (!ctx.TryReadUInt64(mutexAddress, out var pointedHandle))
+        if (!KernelMemoryCompatExports.TryReadUInt64Compat(ctx, mutexAddress, out var pointedHandle))
         {
             return false;
         }
@@ -718,14 +836,11 @@ public static class KernelPthreadCompatExports
 
         if (pointedHandle != 0)
         {
-            lock (_stateGate)
+            if (_mutexStates.TryGetValue(pointedHandle, out state))
             {
-                if (_mutexStates.TryGetValue(pointedHandle, out state))
-                {
-                    _mutexStates[mutexAddress] = state;
-                    resolvedAddress = pointedHandle;
-                    return true;
-                }
+                _mutexStates.TryAdd(mutexAddress, state);
+                resolvedAddress = pointedHandle;
+                return true;
             }
 
             resolvedAddress = pointedHandle;
@@ -738,7 +853,7 @@ public static class KernelPthreadCompatExports
             return false;
         }
 
-        return CreateImplicitMutexState(ctx, mutexAddress, MutexTypeDefault, out resolvedAddress, out state);
+        return CreateImplicitMutexState(ctx, mutexAddress, MutexTypeErrorCheck, out resolvedAddress, out state);
     }
 
     private static ulong ResolveMutexAttrHandle(CpuContext ctx, ulong attrAddress)
@@ -748,7 +863,7 @@ public static class KernelPthreadCompatExports
             return 0;
         }
 
-        if (ctx.TryReadUInt64(attrAddress, out var pointedHandle) && pointedHandle != 0)
+        if (KernelMemoryCompatExports.TryReadUInt64Compat(ctx, attrAddress, out var pointedHandle) && pointedHandle != 0)
         {
             lock (_stateGate)
             {
@@ -782,7 +897,7 @@ public static class KernelPthreadCompatExports
         {
             return _mutexAttrStates.TryGetValue(resolvedAddress, out var state)
                 ? state
-                : new PthreadMutexAttrState(MutexTypeDefault, 0);
+                : new PthreadMutexAttrState(MutexTypeErrorCheck, 0);
         }
     }
 
@@ -801,7 +916,7 @@ public static class KernelPthreadCompatExports
             }
         }
 
-        if (ctx.TryReadUInt64(condAddress, out var pointedHandle) && pointedHandle != 0)
+        if (KernelMemoryCompatExports.TryReadUInt64Compat(ctx, condAddress, out var pointedHandle) && pointedHandle != 0)
         {
             lock (_stateGate)
             {
@@ -833,7 +948,7 @@ public static class KernelPthreadCompatExports
             }
         }
 
-        if (ctx is null || !ctx.TryReadUInt64(condAddress, out var pointedHandle))
+        if (ctx is null || !KernelMemoryCompatExports.TryReadUInt64Compat(ctx, condAddress, out var pointedHandle))
         {
             return false;
         }
@@ -872,7 +987,7 @@ public static class KernelPthreadCompatExports
             _condStates[handle] = createdState;
         }
 
-        if (!ctx.TryWriteUInt64(condAddress, handle))
+        if (!KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, condAddress, handle))
         {
             lock (_stateGate)
             {
@@ -936,7 +1051,7 @@ public static class KernelPthreadCompatExports
             _condStates[handle] = state;
         }
 
-        if (!ctx.TryWriteUInt64(condAddress, handle))
+        if (!KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, condAddress, handle))
         {
             lock (_stateGate)
             {
@@ -967,7 +1082,7 @@ public static class KernelPthreadCompatExports
             }
         }
 
-        _ = ctx.TryWriteUInt64(condAddress, 0);
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, condAddress, 0);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -1103,6 +1218,63 @@ public static class KernelPthreadCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    private static string GetMutexWakeKey(ulong resolvedMutexAddress) =>
+        $"pthread_mutex:0x{resolvedMutexAddress:X16}";
+
+    private static bool TryReserveBlockedMutexLock(
+        CpuContext ctx,
+        ulong mutexAddress,
+        ulong resolvedAddress,
+        PthreadMutexState state,
+        PthreadMutexWaiter waiter)
+    {
+        lock (state)
+        {
+            if (state.OwnerThreadId != 0 || state.RecursionCount != 0)
+            {
+                TracePthreadMutex(ctx, "lock-reserve-busy", mutexAddress, resolvedAddress, state, waiter.ThreadId, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY);
+                return false;
+            }
+
+            state.OwnerThreadId = waiter.ThreadId;
+            state.RecursionCount = 1;
+            Interlocked.Exchange(ref waiter.Reserved, 1);
+        }
+
+        TracePthreadMutex(ctx, "lock-reserve", mutexAddress, resolvedAddress, state, waiter.ThreadId, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+        return true;
+    }
+
+    private static int CompleteBlockedMutexLock(
+        CpuContext ctx,
+        ulong mutexAddress,
+        ulong resolvedAddress,
+        PthreadMutexState state,
+        PthreadMutexWaiter waiter)
+    {
+        var currentThreadId = KernelPthreadState.GetCurrentThreadHandle();
+        if (Interlocked.Exchange(ref waiter.Reserved, 0) == 1)
+        {
+            TracePthreadMutex(ctx, "lock-resume", mutexAddress, resolvedAddress, state, currentThreadId, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        if (!state.Semaphore.Wait(0))
+        {
+            TracePthreadMutex(ctx, "lock-resume-busy", mutexAddress, resolvedAddress, state, currentThreadId, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY;
+        }
+
+        lock (state)
+        {
+            state.OwnerThreadId = currentThreadId;
+            state.RecursionCount = 1;
+        }
+
+        TracePthreadMutex(ctx, "lock-resume", mutexAddress, resolvedAddress, state, currentThreadId, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     private static TimeSpan GetCondWaitTimeout(uint timeoutUsec)
     {
         if (timeoutUsec == 0)
@@ -1127,15 +1299,55 @@ public static class KernelPthreadCompatExports
     {
         return type switch
         {
-            0 => MutexTypeDefault,
+            0 => MutexTypeErrorCheck,
             1 => MutexTypeErrorCheck,
             2 => MutexTypeRecursive,
             3 => MutexTypeNormal,
             4 => MutexTypeAdaptiveNp,
-            _ => MutexTypeDefault,
+            _ => MutexTypeErrorCheck,
         };
     }
 
+    private static object GetPthreadOnceGate(ulong onceAddress)
+    {
+        lock (_stateGate)
+        {
+            if (!_onceGates.TryGetValue(onceAddress, out var gate))
+            {
+                gate = new object();
+                _onceGates[onceAddress] = gate;
+            }
+
+            return gate;
+        }
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
+
+    private static bool TryReadInt32(CpuContext ctx, ulong address, out int value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadInt32LittleEndian(bytes);
+        return true;
+    }
+
+    private static 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 bool CreateImplicitMutexState(CpuContext ctx, ulong mutexAddress, int type, out ulong resolvedAddress, [NotNullWhen(true)] out PthreadMutexState? state)
     {
         var createdState = new PthreadMutexState
@@ -1174,13 +1386,10 @@ public static class KernelPthreadCompatExports
             _mutexStates[handle] = createdState;
         }
 
-        if (!ctx.TryWriteUInt64(mutexAddress, handle))
+        if (!KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, mutexAddress, handle))
         {
-            lock (_stateGate)
-            {
-                _mutexStates.Remove(mutexAddress);
-                _mutexStates.Remove(handle);
-            }
+            _mutexStates.TryRemove(mutexAddress, out _);
+            _mutexStates.TryRemove(handle, out _);
 
             resolvedAddress = 0;
             state = null;
@@ -1204,15 +1413,27 @@ public static class KernelPthreadCompatExports
             $"[LOADER][TRACE] pthread_self: stale_rdi=0x{ctx[CpuRegister.Rdi]:X16} thread=0x{currentThreadHandle:X16} tid=0x{currentThreadId:X16}");
     }
 
-    private static void TracePthreadMutex(CpuContext ctx, string operation, ulong mutexAddress, ulong resolvedAddress, PthreadMutexState? state, ulong currentThreadId, int result)
+    private static void TracePthreadOnce(ulong onceAddress, ulong initRoutine, string operation, string? error)
     {
         if (!ShouldTracePthread())
         {
             return;
         }
 
-        _ = ctx.TryReadUInt64(mutexAddress, out var guestWord0);
-        _ = ctx.TryReadUInt64(mutexAddress + 8, out var guestWord1);
+        var suffix = string.IsNullOrWhiteSpace(error) ? string.Empty : $" error={error}";
+        Console.Error.WriteLine(
+            $"[LOADER][TRACE] pthread_once_{operation}: once=0x{onceAddress:X16} init=0x{initRoutine:X16}{suffix}");
+    }
+
+    private static void TracePthreadMutex(CpuContext ctx, string operation, ulong mutexAddress, ulong resolvedAddress, PthreadMutexState? state, ulong currentThreadId, int result)
+    {
+        if (!ShouldTracePthreadMutex(mutexAddress, resolvedAddress))
+        {
+            return;
+        }
+
+        _ = KernelMemoryCompatExports.TryReadUInt64Compat(ctx, mutexAddress, out var guestWord0);
+        _ = KernelMemoryCompatExports.TryReadUInt64Compat(ctx, mutexAddress + 8, out var guestWord1);
         Console.Error.WriteLine(
             $"[LOADER][TRACE] pthread_{operation}: mutex=0x{mutexAddress:X16} resolved=0x{resolvedAddress:X16} " +
             $"guest[0]=0x{guestWord0:X16} guest[8]=0x{guestWord1:X16} " +
@@ -1222,7 +1443,7 @@ public static class KernelPthreadCompatExports
 
     private static void TracePthreadCond(string operation, ulong condAddress, ulong mutexAddress, PthreadCondState? state, bool timed, int result)
     {
-        if (!ShouldTracePthread())
+        if (!_tracePthreadConds)
         {
             return;
         }
@@ -1234,6 +1455,45 @@ public static class KernelPthreadCompatExports
 
     private static bool ShouldTracePthread()
     {
-        return string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PTHREADS"), "1", StringComparison.Ordinal);
+        return _tracePthreads;
+    }
+
+    private static bool ShouldTracePthreadMutex(ulong mutexAddress, ulong resolvedAddress)
+    {
+        if (_tracePthreadMutexFilter is null || _tracePthreadMutexFilter.Count == 0)
+        {
+            return _tracePthreads;
+        }
+
+        return _tracePthreadMutexFilter.Contains(mutexAddress) ||
+            _tracePthreadMutexFilter.Contains(resolvedAddress);
+    }
+
+    private static HashSet<ulong>? ParseTraceAddressFilter(string? filter)
+    {
+        if (string.IsNullOrWhiteSpace(filter))
+        {
+            return null;
+        }
+
+        var addresses = new HashSet<ulong>();
+        foreach (var token in filter.Split(new[] { ',', ';', ' ' }, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+        {
+            var normalized = token.StartsWith("0x", StringComparison.OrdinalIgnoreCase)
+                ? token[2..]
+                : token;
+            normalized = normalized.TrimStart('0');
+
+            if (ulong.TryParse(
+                    normalized.Length == 0 ? "0" : normalized,
+                    System.Globalization.NumberStyles.HexNumber,
+                    System.Globalization.CultureInfo.InvariantCulture,
+                    out var address))
+            {
+                addresses.Add(address);
+            }
+        }
+
+        return addresses.Count == 0 ? null : addresses;
     }
 }

src/SharpEmu.Libs/Kernel/KernelPthreadExtendedCompatExports.cs

@@ -3,6 +3,7 @@
 
 using SharpEmu.HLE;
 using System.Buffers.Binary;
+using System.Collections.Concurrent;
 using System.Text;
 using System.Threading;
 using System.Diagnostics.CodeAnalysis;
@@ -12,13 +13,13 @@ namespace SharpEmu.Libs.Kernel;
 public static class KernelPthreadExtendedCompatExports
 {
     private const int DefaultThreadPriority = 700;
-    private const ulong DefaultThreadAffinityMask = ulong.MaxValue;
+    private const ulong DefaultThreadAffinityMask = 0x7FUL;
     private const int DefaultDetachState = 0;
     private const ulong DefaultGuardSize = 0x1000UL;
     private const ulong DefaultStackSize = 0x1_00000UL;
-    private const int DefaultInheritSched = 0;
-    private const int DefaultSchedPolicy = 0;
-    private const int DefaultSchedPriority = 0;
+    private const int DefaultInheritSched = 4;
+    private const int DefaultSchedPolicy = 1;
+    private const int DefaultSchedPriority = DefaultThreadPriority;
     private const ulong SyntheticRwlockHandleBase = 0x00006003_0000_0000;
     private const ulong SyntheticPthreadAttrHandleBase = 0x00006004_0000_0000;
 
@@ -26,12 +27,54 @@ public static class KernelPthreadExtendedCompatExports
     private static readonly Dictionary<ulong, ThreadState> _threadStates = new();
     private static readonly Dictionary<ulong, PthreadAttrState> _attrStates = new();
     private static readonly Dictionary<ulong, PthreadRwlockState> _rwlockStates = new();
-    private static readonly Dictionary<int, TlsKeyState> _tlsKeys = new();
+    private static readonly ConcurrentDictionary<int, TlsKeyState> _tlsKeys = new();
     private static int _nextTlsKey = 1;
     private static long _nextSyntheticRwlockHandleId = 1;
     private static long _nextSyntheticPthreadAttrHandleId = 1;
 
-    private static readonly Dictionary<ulong, Dictionary<int, ulong>> _threadLocalSpecific = new();
+    private static readonly ConcurrentDictionary<ulong, ConcurrentDictionary<int, ulong>> _threadLocalSpecific = new();
+
+    internal static void GetThreadStartScheduling(
+        CpuContext ctx,
+        ulong attrAddress,
+        out int priority,
+        out ulong affinityMask)
+    {
+        if (attrAddress == 0)
+        {
+            priority = DefaultThreadPriority;
+            affinityMask = DefaultThreadAffinityMask;
+            return;
+        }
+
+        var resolvedAddress = ResolvePthreadAttrHandle(ctx, attrAddress);
+        lock (_stateGate)
+        {
+            var attributes = GetOrCreateAttrStateLocked(resolvedAddress);
+            priority = attributes.SchedPriority;
+            affinityMask = attributes.AffinityMask;
+        }
+    }
+
+    internal static void RegisterThreadStart(
+        ulong thread,
+        string name,
+        int priority,
+        ulong affinityMask)
+    {
+        lock (_stateGate)
+        {
+            var state = GetOrCreateThreadStateLocked(thread);
+            state.Name = name;
+            state.Priority = priority;
+            state.AffinityMask = affinityMask;
+            state.Attributes = state.Attributes with
+            {
+                SchedPriority = priority,
+                AffinityMask = affinityMask,
+            };
+        }
+    }
 
     private sealed class ThreadState
     {
@@ -185,6 +228,35 @@ public static class KernelPthreadExtendedCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "rcrVFJsQWRY",
+        ExportName = "scePthreadGetaffinity",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadGetaffinity(CpuContext ctx)
+    {
+        var thread = ctx[CpuRegister.Rdi];
+        var outMaskAddress = ctx[CpuRegister.Rsi];
+        if (thread == 0 || outMaskAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        ulong affinityMask;
+        lock (_stateGate)
+        {
+            affinityMask = GetOrCreateThreadStateLocked(thread).AffinityMask;
+        }
+
+        if (!ctx.TryWriteUInt64(outMaskAddress, affinityMask))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "1tKyG7RlMJo",
         ExportName = "scePthreadGetprio",
@@ -645,6 +717,35 @@ public static class KernelPthreadExtendedCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "FXPWHNk8Of0",
+        ExportName = "scePthreadAttrGetschedparam",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libKernel")]
+    public static int PthreadAttrGetschedparam(CpuContext ctx)
+    {
+        var attrAddress = ctx[CpuRegister.Rdi];
+        var schedParamAddress = ctx[CpuRegister.Rsi];
+        if (attrAddress == 0 || schedParamAddress == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
+        }
+
+        PthreadAttrState state;
+        lock (_stateGate)
+        {
+            state = GetOrCreateAttrStateLocked(attrAddress);
+        }
+
+        if (!TryWriteInt32(ctx, schedParamAddress, state.SchedPriority))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "DzES9hQF4f4",
         ExportName = "scePthreadAttrSetschedparam",
@@ -764,7 +865,7 @@ public static class KernelPthreadExtendedCompatExports
             _rwlockStates[syntheticHandle] = rwlock;
         }
 
-        _ = ctx.TryWriteUInt64(rwlockAddress, syntheticHandle);
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, rwlockAddress, syntheticHandle);
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -818,7 +919,7 @@ public static class KernelPthreadExtendedCompatExports
             }
         }
 
-        _ = ctx.TryWriteUInt64(rwlockAddress, 0);
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, rwlockAddress, 0);
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -930,15 +1031,13 @@ public static class KernelPthreadExtendedCompatExports
         }
 
         int key;
-        lock (_stateGate)
+        while (true)
         {
-            while (_tlsKeys.ContainsKey(_nextTlsKey))
+            key = Interlocked.Increment(ref _nextTlsKey) - 1;
+            if (_tlsKeys.TryAdd(key, new TlsKeyState(destructor)))
             {
-                _nextTlsKey++;
+                break;
             }
-
-            key = _nextTlsKey++;
-            _tlsKeys[key] = new TlsKeyState(destructor);
         }
 
         if (!TryWriteInt32(ctx, outKeyAddress, key))
@@ -965,17 +1064,14 @@ public static class KernelPthreadExtendedCompatExports
     public static int PosixPthreadKeyDelete(CpuContext ctx)
     {
         var key = unchecked((int)ctx[CpuRegister.Rdi]);
-        lock (_stateGate)
+        if (!_tlsKeys.TryRemove(key, out _))
         {
-            if (!_tlsKeys.Remove(key))
-            {
-                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
-            }
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        }
 
-            foreach (var entry in _threadLocalSpecific)
-            {
-                entry.Value.Remove(key);
-            }
+        foreach (var values in _threadLocalSpecific.Values)
+        {
+            values.TryRemove(key, out _);
         }
 
         ctx[CpuRegister.Rax] = 0;
@@ -999,22 +1095,15 @@ public static class KernelPthreadExtendedCompatExports
         var key = unchecked((int)ctx[CpuRegister.Rdi]);
         var value = ctx[CpuRegister.Rsi];
         var currentThreadHandle = KernelPthreadState.GetCurrentThreadHandle();
-        lock (_stateGate)
+        if (!_tlsKeys.ContainsKey(key))
         {
-            if (!_tlsKeys.TryGetValue(key, out _))
-            {
-                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
-            }
-
-            if (!_threadLocalSpecific.TryGetValue(currentThreadHandle, out var values))
-            {
-                values = new Dictionary<int, ulong>();
-                _threadLocalSpecific[currentThreadHandle] = values;
-            }
-
-            values[key] = value;
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
+        var values = _threadLocalSpecific.GetOrAdd(
+            currentThreadHandle,
+            static _ => new ConcurrentDictionary<int, ulong>());
+        values[key] = value;
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
@@ -1036,19 +1125,16 @@ public static class KernelPthreadExtendedCompatExports
         var key = unchecked((int)ctx[CpuRegister.Rdi]);
         var currentThreadHandle = KernelPthreadState.GetCurrentThreadHandle();
         ulong value = 0;
-        lock (_stateGate)
+        if (!_tlsKeys.ContainsKey(key))
         {
-            if (!_tlsKeys.TryGetValue(key, out _))
-            {
-                ctx[CpuRegister.Rax] = 0;
-                return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-            }
+            ctx[CpuRegister.Rax] = 0;
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
 
-            if (_threadLocalSpecific.TryGetValue(currentThreadHandle, out var values) &&
-                values.TryGetValue(key, out var storedValue))
-            {
-                value = storedValue;
-            }
+        if (_threadLocalSpecific.TryGetValue(currentThreadHandle, out var values) &&
+            values.TryGetValue(key, out var storedValue))
+        {
+            value = storedValue;
         }
 
         ctx[CpuRegister.Rax] = value;
@@ -1134,7 +1220,7 @@ public static class KernelPthreadExtendedCompatExports
             }
         }
 
-        if (ctx.TryReadUInt64(rwlockAddress, out var pointedHandle) && pointedHandle != 0)
+        if (KernelMemoryCompatExports.TryReadUInt64Compat(ctx, rwlockAddress, out var pointedHandle) && pointedHandle != 0)
         {
             lock (_stateGate)
             {
@@ -1166,7 +1252,7 @@ public static class KernelPthreadExtendedCompatExports
             }
         }
 
-        if (!ctx.TryReadUInt64(rwlockAddress, out var pointedHandle))
+        if (!KernelMemoryCompatExports.TryReadUInt64Compat(ctx, rwlockAddress, out var pointedHandle))
         {
             return false;
         }
@@ -1201,7 +1287,7 @@ public static class KernelPthreadExtendedCompatExports
             _rwlockStates[syntheticHandle] = createdRwlock;
         }
 
-        _ = ctx.TryWriteUInt64(rwlockAddress, syntheticHandle);
+        _ = KernelMemoryCompatExports.TryWriteUInt64Compat(ctx, rwlockAddress, syntheticHandle);
         resolvedAddress = syntheticHandle;
         rwlock = createdRwlock;
         return true;

src/SharpEmu.Libs/Kernel/KernelPthreadState.cs

@@ -1,6 +1,7 @@
 // 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;
@@ -11,8 +12,7 @@ internal static class KernelPthreadState
 {
     private const int ThreadObjectSize = 0x1000;
 
-    private static readonly object Gate = new();
-    private static readonly Dictionary<ulong, ThreadIdentity> Threads = new();
+    private static readonly ConcurrentDictionary<ulong, ThreadIdentity> Threads = new();
     private static readonly byte[] ZeroThreadObject = new byte[ThreadObjectSize];
     private static long _nextUniqueThreadId = 1;
 
@@ -56,10 +56,7 @@ internal static class KernelPthreadState
 
     internal static bool TryGetThreadIdentity(ulong threadHandle, out ThreadIdentity identity)
     {
-        lock (Gate)
-        {
-            return Threads.TryGetValue(threadHandle, out identity);
-        }
+        return Threads.TryGetValue(threadHandle, out identity);
     }
 
     private static void EnsureCurrentThreadRegistered()
@@ -81,10 +78,7 @@ internal static class KernelPthreadState
         Marshal.Copy(ZeroThreadObject, 0, pointer, ThreadObjectSize);
 
         var handle = unchecked((ulong)pointer.ToInt64());
-        lock (Gate)
-        {
-            Threads[handle] = new ThreadIdentity(uniqueId, string.IsNullOrWhiteSpace(name) ? $"Thread-{uniqueId:X}" : name);
-        }
+        Threads[handle] = new ThreadIdentity(uniqueId, string.IsNullOrWhiteSpace(name) ? $"Thread-{uniqueId:X}" : name);
 
         return handle;
     }

src/SharpEmu.Libs/Kernel/KernelRuntimeCompatExports.cs

@@ -7,7 +7,6 @@ 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;
@@ -57,6 +56,13 @@ public static class KernelRuntimeCompatExports
     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();
@@ -80,10 +86,20 @@ public static class KernelRuntimeCompatExports
 
         if (micros < 1000)
         {
-            Thread.Yield();
+            // 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.Sleep(0);
+            }
+            else
+            {
+                Thread.Yield();
+            }
         }
         else
         {
+            _shortUsleepCount = 0;
             var sleepMilliseconds = (int)Math.Min((micros + 999UL) / 1000UL, int.MaxValue);
             Thread.Sleep(sleepMilliseconds);
         }
@@ -94,7 +110,7 @@ public static class KernelRuntimeCompatExports
 
     private static void TraceUsleepSpin(CpuContext ctx, ulong micros)
     {
-        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_USLEEP"), "1", StringComparison.Ordinal))
+        if (!_traceUsleep)
         {
             return;
         }
@@ -106,6 +122,8 @@ public static class KernelRuntimeCompatExports
         }
 
         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))
@@ -113,6 +131,25 @@ public static class KernelRuntimeCompatExports
             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;
@@ -120,7 +157,20 @@ public static class KernelRuntimeCompatExports
         var fiber = FiberExports.GetCurrentFiberAddressForDiagnostics(ctx);
 
         Console.Error.WriteLine(
-            $"[LOADER][TRACE] usleep#{count}: usec={micros} ret=0x{returnRip:X16} thread=0x{thread:X16} fiber=0x{fiber:X16} rbx=0x{rbx:X16} lock@+F78=0x{lockAddress:X16}:{lockText} r13=0x{ctx[CpuRegister.R13]:X16} r14=0x{ctx[CpuRegister.R14]:X16} r15=0x{ctx[CpuRegister.R15]:X16}");
+            $"[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(
@@ -560,19 +610,16 @@ public static class KernelRuntimeCompatExports
     public static int ErrorAddress(CpuContext ctx)
     {
         var address = GetTlsScratchAddress(ctx, TlsErrnoOffset);
-        if (address != 0)
-        {
-            Span<byte> zero = stackalloc byte[sizeof(int)];
-            if (!ctx.Memory.TryWrite(address, zero))
-            {
-                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
-            }
-        }
-
         ctx[CpuRegister.Rax] = address;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    internal static bool TrySetErrno(CpuContext ctx, int value)
+    {
+        var address = GetTlsScratchAddress(ctx, TlsErrnoOffset);
+        return address != 0 && TryWriteInt32(ctx, address, value);
+    }
+
     [SysAbiExport(
         Nid = "bnZxYgAFeA0",
         ExportName = "sceKernelGetSanitizerNewReplaceExternal",
@@ -691,8 +738,11 @@ public static class KernelRuntimeCompatExports
             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} flags=0x{flags:X8} align=0x{effectiveAlignment: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))
         {
@@ -704,6 +754,7 @@ public static class KernelRuntimeCompatExports
             _nextReservedVirtualBase = Math.Max(_nextReservedVirtualBase, mappedAddress + length);
         }
 
+        KernelMemoryCompatExports.RegisterReservedVirtualRange(mappedAddress, length);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -1484,30 +1535,40 @@ public static class KernelRuntimeCompatExports
             ulong.TryParse(overrideHzText, out var overrideHz) &&
             overrideHz >= minSane)
         {
+            TraceKernelTscFrequency("env", overrideHz);
             return overrideHz;
         }
 
-        if (TryResolveCpuidTscFrequency(out ulong cpuidHz) && cpuidHz >= minSane)
-        {
-            return cpuidHz;
-        }
-
         if (TryCalibrateHostTscFrequency(out ulong calibratedHz) && calibratedHz >= minSane)
         {
+            TraceKernelTscFrequency("calibrated-rdtsc", calibratedHz);
             return calibratedHz;
         }
 
+        if (TryResolveCpuidTscFrequency(out ulong cpuidHz) && cpuidHz >= minSane)
+        {
+            TraceKernelTscFrequency("cpuid", cpuidHz);
+            return cpuidHz;
+        }
+
         var hostQpc = Stopwatch.Frequency > 0
             ? unchecked((ulong)Stopwatch.Frequency)
             : DefaultKernelTscFrequency;
         if (hostQpc >= minSane)
         {
+            TraceKernelTscFrequency("qpc", hostQpc);
             return hostQpc;
         }
 
+        TraceKernelTscFrequency("default", DefaultKernelTscFrequency);
         return DefaultKernelTscFrequency;
     }
 
+    private static void TraceKernelTscFrequency(string source, ulong frequencyHz)
+    {
+        Console.Error.WriteLine($"[LOADER][INFO] Kernel TSC frequency: {frequencyHz} Hz ({source})");
+    }
+
     private static bool TryResolveCpuidTscFrequency(out ulong frequencyHz)
     {
         frequencyHz = 0;
@@ -1674,117 +1735,16 @@ public static class KernelRuntimeCompatExports
         bool allowSearch,
         out ulong mappedAddress)
     {
-        mappedAddress = 0;
-        if (length == 0)
-        {
-            return false;
-        }
-
-        try
-        {
-            object memoryObject = ctx.Memory;
-            MethodInfo? allocateAt = null;
-            MethodInfo? allocateAtOrAbove = null;
-            var allocateAtHasAllowAlternativeArg = false;
-            for (var depth = 0; depth < 4; depth++)
-            {
-                foreach (var candidate in memoryObject.GetType().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;
-                        }
-                    }
-
-                    if (allocateAtOrAbove is not null && allocateAt is not null)
-                    {
-                        break;
-                    }
-                }
-
-                if (allocateAtOrAbove is not null || 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 (allowSearch && allocateAtOrAbove is not null)
-            {
-                var searchArgs = new object[] { desiredAddress, length, false, alignment, 0UL };
-                var searchResult = allocateAtOrAbove.Invoke(memoryObject, searchArgs);
-                if (searchResult is bool trueValue && trueValue &&
-                    searchArgs[4] is ulong searchedAddress && searchedAddress != 0)
-                {
-                    mappedAddress = searchedAddress;
-                    return true;
-                }
-            }
-
-            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, false }
-                : 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)
@@ -1797,4 +1757,9 @@ public static class KernelRuntimeCompatExports
         var mask = alignment - 1;
         return (value + mask) & ~mask;
     }
+
+    private static bool ShouldTraceVirtualMemory()
+    {
+        return string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_VIRTUAL_MEMORY"), "1", StringComparison.Ordinal);
+    }
 }

src/SharpEmu.Libs/Kernel/KernelSemaphoreCompatExports.cs

@@ -120,7 +120,7 @@ public static class KernelSemaphoreCompatExports
                 return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT);
             }
 
-            if (!GuestThreadExecution.RequestCurrentThreadBlock("sceKernelWaitSema"))
+            if (!GuestThreadExecution.RequestCurrentThreadBlock(ctx, "sceKernelWaitSema"))
             {
                 TraceSemaphore($"wait-would-block handle=0x{handle:X8} name='{semaphore.Name}' need={needCount} count={semaphore.Count}");
                 return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN);

src/SharpEmu.Libs/Kernel/KernelVirtualRangeAllocator.cs

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

src/SharpEmu.Libs/Network/HttpExports.cs

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

src/SharpEmu.Libs/Network/NetCtlExports.cs

@@ -2,11 +2,40 @@
 // 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",
@@ -17,4 +46,184 @@ public static class NetCtlExports
         ctx[CpuRegister.Rax] = 0;
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
+
+    [SysAbiExport(
+        Nid = "JO4yuTuMoKI",
+        ExportName = "sceNetCtlGetNatInfo",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlGetNatInfo(CpuContext ctx)
+    {
+        var natInfoAddress = ctx[CpuRegister.Rdi];
+        if (natInfoAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        Span<byte> natInfo = stackalloc byte[NatInfoSize];
+        if (!ctx.Memory.TryRead(natInfoAddress, natInfo))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        var size = BinaryPrimitives.ReadUInt32LittleEndian(natInfo[..sizeof(uint)]);
+        if (size != NatInfoSize)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        BinaryPrimitives.WriteInt32LittleEndian(natInfo[4..], 1);
+        BinaryPrimitives.WriteInt32LittleEndian(natInfo[8..], 3);
+        BinaryPrimitives.WriteUInt32LittleEndian(natInfo[12..], 0x7F000001);
+        return ctx.Memory.TryWrite(natInfoAddress, natInfo)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "iQw3iQPhvUQ",
+        ExportName = "sceNetCtlCheckCallback",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlCheckCallback(CpuContext ctx)
+    {
+        return SetReturn(ctx, 0);
+    }
+
+    [SysAbiExport(
+        Nid = "uBPlr0lbuiI",
+        ExportName = "sceNetCtlGetState",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlGetState(CpuContext ctx)
+    {
+        var stateAddress = ctx[CpuRegister.Rdi];
+        if (stateAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        Span<byte> stateBytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(stateBytes, 0);
+        return ctx.Memory.TryWrite(stateAddress, stateBytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "UJ+Z7Q+4ck0",
+        ExportName = "sceNetCtlRegisterCallback",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlRegisterCallback(CpuContext ctx)
+    {
+        var function = ctx[CpuRegister.Rdi];
+        var argument = ctx[CpuRegister.Rsi];
+        var callbackIdAddress = ctx[CpuRegister.Rdx];
+        if (function == 0 || callbackIdAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        lock (CallbackGate)
+        {
+            var callbackId = Array.FindIndex(Callbacks, static callback => callback.Function == 0);
+            if (callbackId < 0)
+            {
+                return SetReturn(ctx, NetCtlErrorNoSpace);
+            }
+
+            Span<byte> callbackIdBytes = stackalloc byte[sizeof(uint)];
+            BinaryPrimitives.WriteUInt32LittleEndian(callbackIdBytes, unchecked((uint)callbackId));
+            if (!ctx.Memory.TryWrite(callbackIdAddress, callbackIdBytes))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            Callbacks[callbackId] = new CallbackRegistration(function, argument);
+        }
+
+        return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    [SysAbiExport(
+        Nid = "obuxdTiwkF8",
+        ExportName = "sceNetCtlGetInfo",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNetCtl")]
+    public static int NetCtlGetInfo(CpuContext ctx)
+    {
+        var code = unchecked((int)ctx[CpuRegister.Rdi]);
+        var infoAddress = ctx[CpuRegister.Rsi];
+        if (infoAddress == 0)
+        {
+            return SetReturn(ctx, NetCtlErrorInvalidAddress);
+        }
+
+        return code switch
+        {
+            NetCtlInfoDevice => WriteUInt32(ctx, infoAddress, NetCtlDeviceWired),
+            NetCtlInfoEtherAddress => WriteZeroBytes(ctx, infoAddress, 6),
+            NetCtlInfoMtu => WriteUInt32(ctx, infoAddress, 1500),
+            NetCtlInfoLink => WriteUInt32(ctx, infoAddress, NetCtlLinkDisconnected),
+            NetCtlInfoIpConfig => WriteUInt32(ctx, infoAddress, NetCtlIpConfigStatic),
+            NetCtlInfoDhcpHostname => WriteAsciiZ(ctx, infoAddress, string.Empty, 256),
+            NetCtlInfoPppoeAuthName => WriteAsciiZ(ctx, infoAddress, string.Empty, 128),
+            NetCtlInfoIpAddress => WriteAsciiZ(ctx, infoAddress, "127.0.0.1", 16),
+            NetCtlInfoNetmask => WriteAsciiZ(ctx, infoAddress, "255.0.0.0", 16),
+            NetCtlInfoDefaultRoute => WriteAsciiZ(ctx, infoAddress, "127.0.0.1", 16),
+            NetCtlInfoPrimaryDns => WriteAsciiZ(ctx, infoAddress, "1.1.1.1", 16),
+            NetCtlInfoSecondaryDns => WriteAsciiZ(ctx, infoAddress, "1.1.1.1", 16),
+            NetCtlInfoHttpProxyConfig => WriteUInt32(ctx, infoAddress, 0),
+            NetCtlInfoHttpProxyServer => WriteAsciiZ(ctx, infoAddress, string.Empty, 256),
+            NetCtlInfoHttpProxyPort => WriteUInt16(ctx, infoAddress, 0),
+            _ => SetReturn(ctx, NetCtlErrorNotConnected),
+        };
+    }
+
+    private static int WriteZeroBytes(CpuContext ctx, ulong address, int count)
+    {
+        Span<byte> bytes = stackalloc byte[count];
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int WriteUInt32(CpuContext ctx, ulong address, uint value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(bytes, value);
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int WriteUInt16(CpuContext ctx, ulong address, ushort value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(ushort)];
+        BinaryPrimitives.WriteUInt16LittleEndian(bytes, value);
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int WriteAsciiZ(CpuContext ctx, ulong address, string value, int byteCount)
+    {
+        Span<byte> bytes = stackalloc byte[byteCount];
+        var copyCount = Math.Min(value.Length, byteCount - 1);
+        for (var i = 0; i < copyCount; i++)
+        {
+            bytes[i] = (byte)value[i];
+        }
+
+        return ctx.Memory.TryWrite(address, bytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(long)result);
+        return result;
+    }
 }

src/SharpEmu.Libs/Network/NetExports.cs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 using System;
+using System.Buffers.Binary;
 using System.Collections.Concurrent;
 using System.Text;
 using System.Threading;
@@ -16,11 +17,15 @@ public static class NetExports
     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",
@@ -42,6 +47,7 @@ public static class NetExports
     {
         _initialized = false;
         _pools.Clear();
+        _resolvers.Clear();
         TraceNet("term", 0, 0, 0, 0);
         return SetReturn(ctx, 0);
     }
@@ -91,6 +97,70 @@ public static class NetExports
         return SetReturn(ctx, 0);
     }
 
+    [SysAbiExport(
+        Nid = "C4UgDHHPvdw",
+        ExportName = "sceNetResolverCreate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetResolverCreate(CpuContext ctx)
+    {
+        var nameAddress = ctx[CpuRegister.Rdi];
+        var poolId = unchecked((int)ctx[CpuRegister.Rsi]);
+        var flags = unchecked((int)ctx[CpuRegister.Rdx]);
+        if (flags != 0)
+        {
+            return SetReturn(ctx, NetErrorInvalidArgument);
+        }
+
+        var name = TryReadUtf8Z(ctx, nameAddress, MaxNameLength, out var value)
+            ? value
+            : string.Empty;
+        var id = Interlocked.Increment(ref _nextResolverId);
+        _resolvers[id] = new ResolverContext(name, poolId, flags, 0);
+        TraceNet("resolver.create", id, unchecked((ulong)poolId), unchecked((ulong)flags), _initialized ? 1UL : 0UL);
+        ctx[CpuRegister.Rax] = unchecked((ulong)id);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "kJlYH5uMAWI",
+        ExportName = "sceNetResolverDestroy",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetResolverDestroy(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        return _resolvers.TryRemove(id, out _)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, NetErrorBadFileDescriptor);
+    }
+
+    [SysAbiExport(
+        Nid = "J5i3hiLJMPk",
+        ExportName = "sceNetResolverGetError",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNet")]
+    public static int NetResolverGetError(CpuContext ctx)
+    {
+        var id = unchecked((int)ctx[CpuRegister.Rdi]);
+        var statusAddress = ctx[CpuRegister.Rsi];
+        if (statusAddress == 0)
+        {
+            return SetReturn(ctx, NetErrorInvalidArgument);
+        }
+
+        if (!_resolvers.TryGetValue(id, out var resolver))
+        {
+            return SetReturn(ctx, NetErrorBadFileDescriptor);
+        }
+
+        Span<byte> status = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(status, resolver.LastError);
+        return ctx.Memory.TryWrite(statusAddress, status)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
     private static int SetReturn(CpuContext ctx, int result)
     {
         ctx[CpuRegister.Rax] = unchecked((ulong)result);

src/SharpEmu.Libs/Ngs2/Ngs2Exports.cs

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

src/SharpEmu.Libs/Np/NpEntitlementAccessExports.cs

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

src/SharpEmu.Libs/Np/NpManagerExports.cs

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

src/SharpEmu.Libs/Np/NpSessionSignalingExports.cs

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

src/SharpEmu.Libs/Np/NpUniversalDataSystemExports.cs

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

src/SharpEmu.Libs/Pad/PadExports.cs

@@ -4,6 +4,7 @@
 using SharpEmu.HLE;
 using System.Buffers.Binary;
 using System.Diagnostics;
+using System.Runtime.InteropServices;
 
 namespace SharpEmu.Libs.Pad;
 
@@ -58,6 +59,7 @@ public static class PadExports
             return SetReturn(ctx, OrbisPadErrorDeviceNotConnected);
         }
 
+        Console.Error.WriteLine("[LOADER][INFO] Keyboard controls: Arrow keys = D-pad, WASD = left stick, IJKL = right stick, Z/Enter = Cross, X/Esc = Circle, C = Square, V = Triangle, Q = L1, E = R1, R = L2, F = R2, Tab/Backspace = Options");
         return SetReturn(ctx, PrimaryPadHandle);
     }
 
@@ -128,12 +130,63 @@ public static class PadExports
             return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
         }
 
+        return WriteNeutralPadData(ctx, dataAddress)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "q1cHNfGycLI",
+        ExportName = "scePadRead",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libScePad")]
+    public static int PadRead(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        var dataAddress = ctx[CpuRegister.Rsi];
+        var count = unchecked((int)ctx[CpuRegister.Rdx]);
+        if (handle != PrimaryPadHandle)
+        {
+            return SetReturn(ctx, OrbisPadErrorInvalidHandle);
+        }
+
+        if (dataAddress == 0 || count < 1 || count > 64)
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        return WriteNeutralPadData(ctx, dataAddress)
+            ? SetReturn(ctx, 1)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+    Nid = "W2G-yoyMF5U",
+    ExportName = "scePadSetVibrationMode",
+    Target = Generation.Gen4 | Generation.Gen5,
+    LibraryName = "libScePad")]
+    public static int PadSetVibrationMode(CpuContext ctx)
+    {
+        return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static bool WriteNeutralPadData(CpuContext ctx, ulong dataAddress)
+    {
         Span<byte> data = stackalloc byte[PadDataSize];
         data.Clear();
-        data[0x04] = 128;
-        data[0x05] = 128;
-        data[0x06] = 128;
-        data[0x07] = 128;
+        var acceptsKeyboardInput = IsEmulatorWindowFocused();
+        var buttons = acceptsKeyboardInput ? ReadKeyboardButtons() : 0;
+        BinaryPrimitives.WriteUInt32LittleEndian(data[0x00..], buttons);
+        var leftX = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x41), IsKeyDown(0x44)) : (byte)128;
+        var leftY = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x57), IsKeyDown(0x53)) : (byte)128;
+        var rightX = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x4A), IsKeyDown(0x4C)) : (byte)128;
+        var rightY = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x49), IsKeyDown(0x4B)) : (byte)128;
+        data[0x04] = leftX;
+        data[0x05] = leftY;
+        data[0x06] = rightX;
+        data[0x07] = rightY;
+        data[0x08] = acceptsKeyboardInput && IsKeyDown(0x52) ? (byte)255 : (byte)0;
+        data[0x09] = acceptsKeyboardInput && IsKeyDown(0x46) ? (byte)255 : (byte)0;
         BinaryPrimitives.WriteSingleLittleEndian(data[0x18..], 1.0f);
         data[0x4C] = 1;
         var timestampTicks = Stopwatch.GetTimestamp();
@@ -145,9 +198,7 @@ public static class PadExports
             timestampMicroseconds);
         data[0x68] = 1;
 
-        return ctx.Memory.TryWrite(dataAddress, data)
-            ? SetReturn(ctx, 0)
-            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        return ctx.Memory.TryWrite(dataAddress, data);
     }
 
     private static int SetReturn(CpuContext ctx, int result)
@@ -155,4 +206,58 @@ public static class PadExports
         ctx[CpuRegister.Rax] = unchecked((ulong)result);
         return result;
     }
+
+    [DllImport("user32.dll")]
+    private static extern short GetAsyncKeyState(int vKey);
+
+    [DllImport("user32.dll")]
+    private static extern nint GetForegroundWindow();
+
+    [DllImport("user32.dll")]
+    private static extern uint GetWindowThreadProcessId(nint hWnd, out uint processId);
+
+    private static bool IsKeyDown(int vk) =>
+        (GetAsyncKeyState(vk) & 0x8000) != 0;
+
+    private static bool IsEmulatorWindowFocused()
+    {
+        var foregroundWindow = GetForegroundWindow();
+        if (foregroundWindow == 0)
+        {
+            return false;
+        }
+
+        GetWindowThreadProcessId(foregroundWindow, out var processId);
+        return processId == (uint)Environment.ProcessId;
+    }
+
+    private static uint ReadKeyboardButtons()
+    {
+        uint buttons = 0;
+        // D-pad
+        if (IsKeyDown(0x25)) buttons |= 0x0080; // Left
+        if (IsKeyDown(0x27)) buttons |= 0x0020; // Right
+        if (IsKeyDown(0x26)) buttons |= 0x0010; // Up
+        if (IsKeyDown(0x28)) buttons |= 0x0040; // Down
+        // Face buttons
+        if (IsKeyDown(0x5A) || IsKeyDown(0x0D)) buttons |= 0x4000; // Z / Enter = Cross
+        if (IsKeyDown(0x58) || IsKeyDown(0x1B)) buttons |= 0x2000; // X / Escape = Circle
+        if (IsKeyDown(0x43)) buttons |= 0x8000; // C = Square
+        if (IsKeyDown(0x56)) buttons |= 0x1000; // V = Triangle
+        // Shoulder buttons
+        if (IsKeyDown(0x51)) buttons |= 0x0400; // Q = L1
+        if (IsKeyDown(0x45)) buttons |= 0x0800; // E = R1
+        if (IsKeyDown(0x52)) buttons |= 0x0100; // R = L2 (digital)
+        if (IsKeyDown(0x46)) buttons |= 0x0200; // F = R2 (digital)
+        // Options (Start)
+        if (IsKeyDown(0x09) || IsKeyDown(0x08)) buttons |= 0x0008; // Tab / Backspace = Options
+        return buttons;
+    }
+
+    private static byte ReadAnalogStick(bool negative, bool positive)
+    {
+        if (negative && !positive) return 0;
+        if (positive && !negative) return 255;
+        return 128;
+    }
 }

src/SharpEmu.Libs/PlayGo/PlayGoExports.cs

@@ -29,6 +29,7 @@ public static class PlayGoExports
     private const int PlayGoInstallSpeedTrickle = 1;
     private const int PlayGoInstallSpeedFull = 2;
     private const uint MaxPlayGoQueryEntries = 0x4000;
+    private const uint PlayGoAllEntriesSentinel = uint.MaxValue;
 
     private static readonly Regex ChunkIdPattern = new(
         @"<chunk\s+[^>]*\bid\s*=\s*""(?<id>\d+)""",
@@ -44,6 +45,8 @@ public static class PlayGoExports
     private static PlayGoMetadata _metadata = PlayGoMetadata.Empty;
     private static int _installSpeed = PlayGoInstallSpeedTrickle;
     private static ulong _languageMask = ulong.MaxValue;
+    private static int _unknownChunkDiagnostics;
+    private static int _locusTraceDiagnostics;
 
     [SysAbiExport(
         Nid = "ts6GlZOKRrE",
@@ -93,6 +96,7 @@ public static class PlayGoExports
             _languageMask = ulong.MaxValue;
             _opened = false;
             _initialized = true;
+            TracePlayGo($"initialize chunks={_metadata.ChunkIds.Length} available={_metadata.Available}");
         }
 
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
@@ -130,6 +134,7 @@ public static class PlayGoExports
             }
 
             _opened = true;
+            TracePlayGo($"open handle={PlayGoHandle} chunks={_metadata.ChunkIds.Length}");
         }
 
         Span<byte> handleBytes = stackalloc byte[sizeof(uint)];
@@ -228,6 +233,7 @@ public static class PlayGoExports
         var availableEntries = chunkIds.Length == 0 ? 1u : (uint)chunkIds.Length;
         if (outChunkIdList == 0)
         {
+            TracePlayGo($"get_chunk_id count_only entries={availableEntries} out_entries=0x{outEntries:X16}");
             return TryWriteUInt32(ctx, outEntries, availableEntries)
                 ? (int)OrbisGen2Result.ORBIS_GEN2_OK
                 : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -236,6 +242,7 @@ public static class PlayGoExports
         var entriesToWrite = Math.Min(numberOfEntries, availableEntries);
         if (entriesToWrite > MaxPlayGoQueryEntries)
         {
+            TracePlayGo($"get_chunk_id bad_size requested={numberOfEntries} available={availableEntries}");
             return OrbisPlayGoErrorBadSize;
         }
 
@@ -248,6 +255,7 @@ public static class PlayGoExports
             }
         }
 
+        TracePlayGo($"get_chunk_id write requested={numberOfEntries} wrote={entriesToWrite} available={availableEntries}");
         return TryWriteUInt32(ctx, outEntries, entriesToWrite)
             ? (int)OrbisGen2Result.ORBIS_GEN2_OK
             : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -278,6 +286,7 @@ public static class PlayGoExports
 
         if (numberOfEntries == 0 || numberOfEntries > MaxPlayGoQueryEntries)
         {
+            TracePlayGo($"get_eta bad_size entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outEta:X16}");
             return OrbisPlayGoErrorBadSize;
         }
 
@@ -375,8 +384,15 @@ public static class PlayGoExports
             return OrbisPlayGoErrorBadPointer;
         }
 
+        if (numberOfEntries == PlayGoAllEntriesSentinel)
+        {
+            TracePlayGo($"get_locus sentinel entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outLoci:X16}");
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
         if (numberOfEntries == 0 || numberOfEntries > MaxPlayGoQueryEntries)
         {
+            TracePlayGo($"get_locus bad_size entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outLoci:X16}");
             return OrbisPlayGoErrorBadSize;
         }
 
@@ -390,15 +406,24 @@ public static class PlayGoExports
 
             if (!IsKnownChunkId(chunkId))
             {
-                loci[i] = PlayGoLocusNotDownloaded;
-                return ctx.Memory.TryWrite(outLoci, loci)
-                    ? OrbisPlayGoErrorBadChunkId
-                    : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+                if (Interlocked.Increment(ref _unknownChunkDiagnostics) <= 8)
+                {
+                    ushort[] knownChunkIds;
+                    lock (_stateGate)
+                    {
+                        knownChunkIds = _metadata.ChunkIds;
+                    }
+
+                    Console.Error.WriteLine(
+                        $"[LOADER][TRACE] playgo.unknown_chunk_id id={chunkId} entries={numberOfEntries} " +
+                        $"known=[{string.Join(',', knownChunkIds)}]");
+                }
             }
 
             loci[i] = PlayGoLocusLocalFast;
         }
 
+        TracePlayGoLocus(numberOfEntries, chunkIds, outLoci);
         return ctx.Memory.TryWrite(outLoci, loci)
             ? (int)OrbisGen2Result.ORBIS_GEN2_OK
             : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -429,6 +454,7 @@ public static class PlayGoExports
 
         if (numberOfEntries == 0 || numberOfEntries > MaxPlayGoQueryEntries)
         {
+            TracePlayGo($"get_progress bad_size entries={numberOfEntries} chunk_ids=0x{chunkIds:X16} out=0x{outProgress:X16}");
             return OrbisPlayGoErrorBadSize;
         }
 
@@ -438,6 +464,7 @@ public static class PlayGoExports
             return chunkError;
         }
 
+        TracePlayGo($"get_progress entries={numberOfEntries}");
         Span<byte> progress = stackalloc byte[sizeof(ulong) * 2];
         BinaryPrimitives.WriteUInt64LittleEndian(progress, 0);
         BinaryPrimitives.WriteUInt64LittleEndian(progress[sizeof(ulong)..], 0);
@@ -471,9 +498,11 @@ public static class PlayGoExports
 
         if (numberOfEntries == 0)
         {
+            TracePlayGo("get_todo bad_size entries=0");
             return OrbisPlayGoErrorBadSize;
         }
 
+        TracePlayGo($"get_todo requested={numberOfEntries} wrote=0");
         return TryWriteUInt32(ctx, outEntries, 0)
             ? (int)OrbisGen2Result.ORBIS_GEN2_OK
             : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
@@ -624,10 +653,7 @@ public static class PlayGoExports
                 return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
             }
 
-            if (!IsKnownChunkId(chunkId))
-            {
-                return OrbisPlayGoErrorBadChunkId;
-            }
+            _ = chunkId;
         }
 
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
@@ -743,6 +769,29 @@ public static class PlayGoExports
         return ctx.Memory.TryWrite(address, buffer);
     }
 
+    private static void TracePlayGo(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PLAYGO"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] playgo.{message}");
+        }
+    }
+
+    private static void TracePlayGoLocus(uint entries, ulong chunkIds, ulong outLoci)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_PLAYGO"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        var count = Interlocked.Increment(ref _locusTraceDiagnostics);
+        if (entries != 1 || count <= 32 || count % 1000 == 0)
+        {
+            Console.Error.WriteLine(
+                $"[LOADER][TRACE] playgo.get_locus entries={entries} chunk_ids=0x{chunkIds:X16} out=0x{outLoci:X16}");
+        }
+    }
+
     private sealed record PlayGoMetadata(bool Available, ushort[] ChunkIds)
     {
         public static readonly PlayGoMetadata Empty = new(false, Array.Empty<ushort>());

src/SharpEmu.Libs/Rtc/RtcExports.cs

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

src/SharpEmu.Libs/SaveData/SaveDataDialogExports.cs

@@ -0,0 +1,213 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using System.Buffers.Binary;
+using System.Threading;
+
+namespace SharpEmu.Libs.SaveData;
+
+public static class SaveDataDialogExports
+{
+    private const int StatusNone = 0;
+    private const int StatusInitialized = 1;
+    private const int StatusRunning = 2;
+    private const int StatusFinished = 3;
+
+    private const int ErrorOk = 0;
+    private const int ErrorNotInitialized = unchecked((int)0x80B80003);
+    private const int ErrorAlreadyInitialized = unchecked((int)0x80B80004);
+    private const int ErrorNotFinished = unchecked((int)0x80B80005);
+    private const int ErrorNotRunning = unchecked((int)0x80B8000B);
+    private const int ErrorArgNull = unchecked((int)0x80B8000D);
+
+    private const int ResultSize = 0x48;
+    private static int _status;
+    private static int _lastMode;
+    private static ulong _lastUserData;
+
+    [SysAbiExport(
+        Nid = "s9e3+YpRnzw",
+        ExportName = "sceSaveDataDialogInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogInitialize(CpuContext ctx)
+    {
+        if (Interlocked.CompareExchange(ref _status, StatusInitialized, StatusNone) != StatusNone)
+        {
+            return SetReturn(ctx, ErrorAlreadyInitialized);
+        }
+
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "4tPhsP6FpDI",
+        ExportName = "sceSaveDataDialogOpen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogOpen(CpuContext ctx)
+    {
+        var paramAddress = ctx[CpuRegister.Rdi];
+        if (paramAddress == 0)
+        {
+            return SetReturn(ctx, ErrorArgNull);
+        }
+
+        if (_status is not (StatusInitialized or StatusFinished))
+        {
+            return SetReturn(ctx, ErrorNotInitialized);
+        }
+
+        _lastMode = TryReadInt32(ctx, paramAddress, out var mode) ? mode : 0;
+        _lastUserData = TryReadUInt64(ctx, paramAddress + 0xC8, out var userData) ? userData : 0;
+
+        // There is no host save dialog yet. Complete immediately with OK so
+        // guest polling sees a finished dialog instead of spinning forever.
+        Interlocked.Exchange(ref _status, StatusFinished);
+        TraceSaveDataDialog($"open mode={_lastMode} userData=0x{_lastUserData:X16} -> finished");
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "ERKzksauAJA",
+        ExportName = "sceSaveDataDialogGetStatus",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogGetStatus(CpuContext ctx) => SetReturn(ctx, Volatile.Read(ref _status));
+
+    [SysAbiExport(
+        Nid = "KK3Bdg1RWK0",
+        ExportName = "sceSaveDataDialogUpdateStatus",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogUpdateStatus(CpuContext ctx) => SetReturn(ctx, Volatile.Read(ref _status));
+
+    [SysAbiExport(
+        Nid = "en7gNVnh878",
+        ExportName = "sceSaveDataDialogIsReadyToDisplay",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogIsReadyToDisplay(CpuContext ctx) => SetReturn(ctx, 1);
+
+    [SysAbiExport(
+        Nid = "yEiJ-qqr6Cg",
+        ExportName = "sceSaveDataDialogGetResult",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogGetResult(CpuContext ctx)
+    {
+        var resultAddress = ctx[CpuRegister.Rdi];
+        if (resultAddress == 0)
+        {
+            return SetReturn(ctx, ErrorArgNull);
+        }
+
+        if (Volatile.Read(ref _status) != StatusFinished)
+        {
+            return SetReturn(ctx, ErrorNotFinished);
+        }
+
+        Span<byte> result = stackalloc byte[ResultSize];
+        result.Clear();
+        BinaryPrimitives.WriteInt32LittleEndian(result[0x00..], _lastMode);
+        BinaryPrimitives.WriteInt32LittleEndian(result[0x04..], 0);
+        BinaryPrimitives.WriteInt32LittleEndian(result[0x08..], 0);
+        BinaryPrimitives.WriteUInt64LittleEndian(result[0x20..], _lastUserData);
+
+        if (!ctx.Memory.TryWrite(resultAddress, result))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "fH46Lag88XY",
+        ExportName = "sceSaveDataDialogClose",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogClose(CpuContext ctx)
+    {
+        if (Interlocked.CompareExchange(ref _status, StatusFinished, StatusRunning) != StatusRunning)
+        {
+            return SetReturn(ctx, ErrorNotRunning);
+        }
+
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "YuH2FA7azqQ",
+        ExportName = "sceSaveDataDialogTerminate",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogTerminate(CpuContext ctx)
+    {
+        if (Interlocked.Exchange(ref _status, StatusNone) == StatusNone)
+        {
+            return SetReturn(ctx, ErrorNotInitialized);
+        }
+
+        _lastMode = 0;
+        _lastUserData = 0;
+        return SetReturn(ctx, ErrorOk);
+    }
+
+    [SysAbiExport(
+        Nid = "V-uEeFKARJU",
+        ExportName = "sceSaveDataDialogProgressBarInc",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogProgressBarInc(CpuContext ctx) => SetReturn(ctx, ErrorOk);
+
+    [SysAbiExport(
+        Nid = "hay1CfTmLyA",
+        ExportName = "sceSaveDataDialogProgressBarSetValue",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveDataDialog")]
+    public static int SaveDataDialogProgressBarSetValue(CpuContext ctx) => SetReturn(ctx, ErrorOk);
+
+    private static bool TryReadInt32(CpuContext ctx, ulong address, out int value)
+    {
+        value = 0;
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadInt32LittleEndian(bytes);
+        return true;
+    }
+
+    private static bool TryReadUInt64(CpuContext ctx, ulong address, out ulong value)
+    {
+        value = 0;
+        Span<byte> bytes = stackalloc byte[sizeof(ulong)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt64LittleEndian(bytes);
+        return true;
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceSaveDataDialog(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_SAVEDATA"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] save_data_dialog.{message}");
+    }
+}

src/SharpEmu.Libs/SaveData/SaveDataExports.cs

@@ -0,0 +1,569 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+using SharpEmu.Libs.Kernel;
+using System.Buffers.Binary;
+using System.Text;
+
+namespace SharpEmu.Libs.SaveData;
+
+public static class SaveDataExports
+{
+    private const int OrbisSaveDataErrorParameter = unchecked((int)0x809F0000);
+    private const int OrbisSaveDataErrorExists = unchecked((int)0x809F0007);
+    private const int OrbisSaveDataErrorNotFound = unchecked((int)0x809F0008);
+    private const int OrbisSaveDataErrorInternal = unchecked((int)0x809F000B);
+    private const int SaveDataTitleIdSize = 10;
+    private const int SaveDataDirNameSize = 32;
+    private const int SaveDataParamSize = 0x530;
+    private const int SaveDataSearchInfoSize = 0x30;
+    private const ulong ResultHitNumOffset = 0x00;
+    private const ulong ResultDirNamesOffset = 0x08;
+    private const ulong ResultDirNamesNumOffset = 0x10;
+    private const ulong ResultSetNumOffset = 0x14;
+    private const ulong ResultParamsOffset = 0x18;
+    private const ulong ResultInfosOffset = 0x20;
+    private const uint SortKeyFreeBlocks = 5;
+    private const uint SortOrderDescent = 1;
+    private const uint MountModeCreate = 1u << 2;
+    private const uint MountModeCreate2 = 1u << 5;
+    private const int MountResultSize = 0x40;
+    private static readonly object _stateGate = new();
+    private static string? _titleId;
+
+    public static void ConfigureApplicationInfo(string? titleId)
+    {
+        lock (_stateGate)
+        {
+            _titleId = string.IsNullOrWhiteSpace(titleId) ? null : SanitizePathSegment(titleId.Trim());
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "TywrFKCoLGY",
+        ExportName = "sceSaveDataInitialize3",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataInitialize3(CpuContext ctx)
+    {
+        try
+        {
+            Directory.CreateDirectory(ResolveSaveDataRoot());
+            return SetReturn(ctx, 0);
+        }
+        catch (IOException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "dyIhnXq-0SM",
+        ExportName = "sceSaveDataDirNameSearch",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataDirNameSearch(CpuContext ctx)
+    {
+        var condAddress = ctx[CpuRegister.Rdi];
+        var resultAddress = ctx[CpuRegister.Rsi];
+        if (condAddress == 0 || resultAddress == 0)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        if (!TryReadSearchCond(ctx, condAddress, out var cond) ||
+            !TryReadSearchResult(ctx, resultAddress, out var result))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        if (cond.UserId < 0 || cond.SortKey > SortKeyFreeBlocks || cond.SortOrder > SortOrderDescent)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        try
+        {
+            string titleId;
+            if (cond.TitleIdAddress == 0)
+            {
+                titleId = ResolveConfiguredTitleId();
+            }
+            else if (!TryReadFixedAscii(ctx, cond.TitleIdAddress, SaveDataTitleIdSize, out titleId))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            var root = ResolveTitleSaveRoot(cond.UserId, titleId);
+            var entries = Directory.Exists(root)
+                ? EnumerateSaveDirectories(root, cond.Pattern)
+                : [];
+
+            entries = SortEntries(entries, cond.SortKey, cond.SortOrder);
+            var setNum = result.DirNamesNum == 0
+                ? 0
+                : Math.Min(result.DirNamesNum, entries.Count);
+            if (!TryWriteUInt32(ctx, resultAddress + ResultHitNumOffset, checked((uint)entries.Count)) ||
+                !TryWriteUInt32(ctx, resultAddress + ResultSetNumOffset, checked((uint)setNum)))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            if (setNum == 0)
+            {
+                TraceSaveData($"dir_name_search user={cond.UserId} title={titleId} hits={entries.Count} set=0 root='{root}'");
+                return SetReturn(ctx, 0);
+            }
+
+            if (result.DirNamesAddress == 0)
+            {
+                return SetReturn(ctx, OrbisSaveDataErrorParameter);
+            }
+
+            for (var i = 0; i < setNum; i++)
+            {
+                var entry = entries[i];
+                if (!TryWriteFixedAscii(
+                        ctx,
+                        result.DirNamesAddress + ((ulong)i * SaveDataDirNameSize),
+                        SaveDataDirNameSize,
+                        entry.Name) ||
+                    (result.ParamsAddress != 0 &&
+                     !TryWriteParam(ctx, result.ParamsAddress + ((ulong)i * SaveDataParamSize), entry)) ||
+                    (result.InfosAddress != 0 &&
+                     !TryWriteSearchInfo(ctx, result.InfosAddress + ((ulong)i * SaveDataSearchInfoSize), entry)))
+                {
+                    return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+                }
+            }
+
+            TraceSaveData($"dir_name_search user={cond.UserId} title={titleId} hits={entries.Count} set={setNum} root='{root}'");
+            return SetReturn(ctx, 0);
+        }
+        catch (IOException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+    }
+
+    [SysAbiExport(
+        Nid = "ZP4e7rlzOUk",
+        ExportName = "sceSaveDataMount3",
+        Target = Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataMount3(CpuContext ctx)
+    {
+        var mountAddress = ctx[CpuRegister.Rdi];
+        var resultAddress = ctx[CpuRegister.Rsi];
+        if (mountAddress == 0 || resultAddress == 0)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        if (!TryReadInt32(ctx, mountAddress, out var userId) ||
+            !ctx.TryReadUInt64(mountAddress + 0x08, out var dirNameAddress) ||
+            !ctx.TryReadUInt64(mountAddress + 0x10, out var blocks) ||
+            !ctx.TryReadUInt64(mountAddress + 0x18, out var systemBlocks) ||
+            !TryReadUInt32(ctx, mountAddress + 0x20, out var mountMode) ||
+            !TryReadUInt32(ctx, mountAddress + 0x24, out var resource) ||
+            !TryReadUInt32(ctx, mountAddress + 0x28, out var mode) ||
+            dirNameAddress == 0 ||
+            !TryReadFixedAscii(ctx, dirNameAddress, SaveDataDirNameSize, out var dirName))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        if (userId < 0 || string.IsNullOrWhiteSpace(dirName))
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        try
+        {
+            var titleId = ResolveConfiguredTitleId();
+            var savePath = Path.Combine(
+                ResolveTitleSaveRoot(userId, titleId),
+                SanitizePathSegment(dirName));
+            var existed = Directory.Exists(savePath);
+            var create = (mountMode & MountModeCreate) != 0;
+            var createIfMissing = (mountMode & MountModeCreate2) != 0;
+
+            if (!existed && !create && !createIfMissing)
+            {
+                return SetReturn(ctx, OrbisSaveDataErrorNotFound);
+            }
+
+            if (existed && create)
+            {
+                return SetReturn(ctx, OrbisSaveDataErrorExists);
+            }
+
+            if (!existed)
+            {
+                Directory.CreateDirectory(savePath);
+            }
+
+            const string mountPoint = "/savedata0";
+            KernelMemoryCompatExports.RegisterGuestPathMount(mountPoint, savePath);
+
+            Span<byte> result = stackalloc byte[MountResultSize];
+            result.Clear();
+            WriteAscii(result[..16], mountPoint);
+            BinaryPrimitives.WriteUInt32LittleEndian(result[0x1C..], createIfMissing && !existed ? 1u : 0u);
+            if (!ctx.Memory.TryWrite(resultAddress, result))
+            {
+                return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+
+            TraceSaveData(
+                $"mount3 user={userId} title={titleId} dir={dirName} blocks={blocks} " +
+                $"system_blocks={systemBlocks} mount_mode=0x{mountMode:X} resource={resource} mode={mode} " +
+                $"mount_point={mountPoint} created={!existed} root='{savePath}'");
+            return SetReturn(ctx, 0);
+        }
+        catch (IOException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorInternal);
+        }
+        catch (ArgumentException)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+    }
+
+    private static int _nextTransactionResource;
+    [SysAbiExport(
+        Nid = "gjRZNnw0JPE",
+        ExportName = "sceSaveDataCreateTransactionResource",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSaveData")]
+    public static int SaveDataCreateTransactionResource(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var reserved = ctx[CpuRegister.Rsi];
+        var resourceAddress = ctx[CpuRegister.Rdx];
+
+        if (resourceAddress == 0)
+        {
+            return SetReturn(ctx, OrbisSaveDataErrorParameter);
+        }
+
+        var id = (uint)Interlocked.Increment(ref _nextTransactionResource);
+
+        if (!TryWriteUInt32(ctx, resourceAddress, id))
+        {
+            return SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+        }
+
+        TraceSaveData(
+            $"create_transaction_resource user={userId} reserved=0x{reserved:X} resource_addr=0x{resourceAddress:X} id={id}");
+
+        return SetReturn(ctx, 0);
+    }
+
+    private static bool TryReadSearchCond(CpuContext ctx, ulong address, out SearchCond cond)
+    {
+        cond = default;
+        if (!TryReadInt32(ctx, address, out var userId) ||
+            !ctx.TryReadUInt64(address + 0x08, out var titleIdAddress) ||
+            !ctx.TryReadUInt64(address + 0x10, out var dirNameAddress) ||
+            !TryReadUInt32(ctx, address + 0x18, out var sortKey) ||
+            !TryReadUInt32(ctx, address + 0x1C, out var sortOrder))
+        {
+            return false;
+        }
+
+        string pattern;
+        if (dirNameAddress == 0)
+        {
+            pattern = string.Empty;
+        }
+        else if (!TryReadFixedAscii(ctx, dirNameAddress, SaveDataDirNameSize, out pattern))
+        {
+            return false;
+        }
+
+        cond = new SearchCond(userId, titleIdAddress, pattern, sortKey, sortOrder);
+        return true;
+    }
+
+    private static bool TryReadSearchResult(CpuContext ctx, ulong address, out SearchResult result)
+    {
+        result = default;
+        if (!ctx.TryReadUInt64(address + ResultDirNamesOffset, out var dirNamesAddress) ||
+            !TryReadUInt32(ctx, address + ResultDirNamesNumOffset, out var dirNamesNum) ||
+            !ctx.TryReadUInt64(address + ResultParamsOffset, out var paramsAddress) ||
+            !ctx.TryReadUInt64(address + ResultInfosOffset, out var infosAddress))
+        {
+            return false;
+        }
+
+        result = new SearchResult(dirNamesAddress, dirNamesNum, paramsAddress, infosAddress);
+        return true;
+    }
+
+    private static List<SaveEntry> EnumerateSaveDirectories(string root, string pattern)
+    {
+        var entries = new List<SaveEntry>();
+        foreach (var directory in Directory.EnumerateDirectories(root))
+        {
+            var name = Path.GetFileName(directory);
+            if (string.IsNullOrWhiteSpace(name) ||
+                name.StartsWith("sce_", StringComparison.OrdinalIgnoreCase) ||
+                (!string.IsNullOrEmpty(pattern) && !MatchPattern(name, pattern)))
+            {
+                continue;
+            }
+
+            var info = new DirectoryInfo(directory);
+            entries.Add(new SaveEntry(name, directory, info.LastWriteTimeUtc));
+        }
+
+        return entries;
+    }
+
+    private static List<SaveEntry> SortEntries(List<SaveEntry> entries, uint sortKey, uint sortOrder)
+    {
+        IOrderedEnumerable<SaveEntry> sorted = sortKey switch
+        {
+            3 => entries.OrderBy(entry => entry.LastWriteUtc),
+            _ => entries.OrderBy(entry => entry.Name, StringComparer.OrdinalIgnoreCase),
+        };
+
+        var list = sorted.ToList();
+        if (sortOrder == SortOrderDescent)
+        {
+            list.Reverse();
+        }
+
+        return list;
+    }
+
+    private static bool TryWriteParam(CpuContext ctx, ulong address, SaveEntry entry)
+    {
+        var param = new byte[SaveDataParamSize];
+        WriteAscii(param.AsSpan(0x00, 128), "Saved Data");
+        WriteAscii(param.AsSpan(0x100, 1024), entry.Name);
+        BinaryPrimitives.WriteInt64LittleEndian(
+            param.AsSpan(0x508, sizeof(long)),
+            new DateTimeOffset(entry.LastWriteUtc).ToUnixTimeSeconds());
+        return ctx.Memory.TryWrite(address, param);
+    }
+
+    private static bool TryWriteSearchInfo(CpuContext ctx, ulong address, SaveEntry entry)
+    {
+        var size = GetDirectorySize(entry.Path);
+        var usedBlocks = checked((ulong)((size + 32767) / 32768));
+        var blocks = Math.Max(96UL, usedBlocks);
+        Span<byte> info = stackalloc byte[SaveDataSearchInfoSize];
+        info.Clear();
+        BinaryPrimitives.WriteUInt64LittleEndian(info[0x00..], blocks);
+        BinaryPrimitives.WriteUInt64LittleEndian(info[0x08..], blocks - usedBlocks);
+        return ctx.Memory.TryWrite(address, info);
+    }
+
+    private static long GetDirectorySize(string root)
+    {
+        long total = 0;
+        foreach (var file in Directory.EnumerateFiles(root, "*", SearchOption.AllDirectories))
+        {
+            total += new FileInfo(file).Length;
+        }
+
+        return total;
+    }
+
+    private static bool MatchPattern(string value, string pattern) =>
+        MatchPattern(value.AsSpan(), pattern.AsSpan());
+
+    private static bool MatchPattern(ReadOnlySpan<char> value, ReadOnlySpan<char> pattern)
+    {
+        if (pattern.IsEmpty)
+        {
+            return value.IsEmpty;
+        }
+
+        if (pattern[0] == '%')
+        {
+            for (var i = 0; i <= value.Length; i++)
+            {
+                if (MatchPattern(value[i..], pattern[1..]))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        if (value.IsEmpty)
+        {
+            return false;
+        }
+
+        if (pattern[0] == '_' ||
+            char.ToUpperInvariant(pattern[0]) == char.ToUpperInvariant(value[0]))
+        {
+            return MatchPattern(value[1..], pattern[1..]);
+        }
+
+        return false;
+    }
+
+    private static string ResolveTitleSaveRoot(int userId, string titleId) =>
+        Path.Combine(ResolveSaveDataRoot(), userId.ToString(), SanitizePathSegment(titleId));
+
+    private static string ResolveSaveDataRoot()
+    {
+        var configured = Environment.GetEnvironmentVariable("SHARPEMU_SAVEDATA_DIR");
+        var root = string.IsNullOrWhiteSpace(configured)
+            ? Path.Combine(AppContext.BaseDirectory, "user", "savedata")
+            : configured;
+        return Path.GetFullPath(root);
+    }
+
+    private static string ResolveConfiguredTitleId()
+    {
+        lock (_stateGate)
+        {
+            if (!string.IsNullOrWhiteSpace(_titleId))
+            {
+                return _titleId;
+            }
+        }
+
+        var app0Root = Environment.GetEnvironmentVariable("SHARPEMU_APP0_DIR");
+        var app0Name = string.IsNullOrWhiteSpace(app0Root)
+            ? null
+            : Path.GetFileName(Path.TrimEndingDirectorySeparator(app0Root));
+        if (!string.IsNullOrWhiteSpace(app0Name))
+        {
+            var candidate = app0Name.Split('-', StringSplitOptions.RemoveEmptyEntries)[0];
+            if (!string.IsNullOrWhiteSpace(candidate))
+            {
+                return SanitizePathSegment(candidate);
+            }
+        }
+
+        return "default";
+    }
+
+    private static string SanitizePathSegment(string value)
+    {
+        var invalid = Path.GetInvalidFileNameChars();
+        var sanitized = new string(value.Select(ch => invalid.Contains(ch) ? '_' : ch).ToArray());
+        return string.IsNullOrWhiteSpace(sanitized) ? "default" : sanitized;
+    }
+
+    private static bool TryReadFixedAscii(CpuContext ctx, ulong address, int length, out string value)
+    {
+        value = string.Empty;
+        Span<byte> buffer = stackalloc byte[length];
+        if (!ctx.Memory.TryRead(address, buffer))
+        {
+            return false;
+        }
+
+        var stringLength = buffer.IndexOf((byte)0);
+        if (stringLength < 0)
+        {
+            stringLength = buffer.Length;
+        }
+
+        value = Encoding.ASCII.GetString(buffer[..stringLength]);
+        return true;
+    }
+
+    private static bool TryWriteFixedAscii(CpuContext ctx, ulong address, int length, string value)
+    {
+        Span<byte> buffer = stackalloc byte[length];
+        buffer.Clear();
+        WriteAscii(buffer, value);
+        return ctx.Memory.TryWrite(address, buffer);
+    }
+
+    private static void WriteAscii(Span<byte> destination, string value)
+    {
+        var count = Math.Min(value.Length, Math.Max(0, destination.Length - 1));
+        for (var i = 0; i < count; i++)
+        {
+            var ch = value[i];
+            destination[i] = ch <= 0x7F ? (byte)ch : (byte)'?';
+        }
+    }
+
+    private static bool TryReadInt32(CpuContext ctx, ulong address, out int value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(int)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadInt32LittleEndian(bytes);
+        return true;
+    }
+
+    private static bool TryReadUInt32(CpuContext ctx, ulong address, out uint value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(uint)];
+        if (!ctx.Memory.TryRead(address, bytes))
+        {
+            value = 0;
+            return false;
+        }
+
+        value = BinaryPrimitives.ReadUInt32LittleEndian(bytes);
+        return true;
+    }
+
+    private static bool TryWriteUInt32(CpuContext ctx, ulong address, uint value)
+    {
+        Span<byte> bytes = stackalloc byte[sizeof(uint)];
+        BinaryPrimitives.WriteUInt32LittleEndian(bytes, value);
+        return ctx.Memory.TryWrite(address, bytes);
+    }
+
+    private static int SetReturn(CpuContext ctx, int result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)result);
+        return result;
+    }
+
+    private static void TraceSaveData(string message)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_SAVEDATA"), "1", StringComparison.Ordinal))
+        {
+            Console.Error.WriteLine($"[LOADER][TRACE] savedata.{message}");
+        }
+    }
+
+    private readonly record struct SearchCond(
+        int UserId,
+        ulong TitleIdAddress,
+        string Pattern,
+        uint SortKey,
+        uint SortOrder);
+
+    private readonly record struct SearchResult(
+        ulong DirNamesAddress,
+        uint DirNamesNum,
+        ulong ParamsAddress,
+        ulong InfosAddress);
+
+    private readonly record struct SaveEntry(string Name, string Path, DateTime LastWriteUtc);
+}

src/SharpEmu.Libs/Share/ShareExports.cs

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

src/SharpEmu.Libs/SharpEmu.Libs.csproj

@@ -10,6 +10,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
 
   <ItemGroup>
     <PackageReference Include="Silk.NET.Vulkan" />
+    <PackageReference Include="Silk.NET.Vulkan.Extensions.EXT" />
     <PackageReference Include="Silk.NET.Vulkan.Extensions.KHR" />
     <PackageReference Include="Silk.NET.Windowing" />
   </ItemGroup>

src/SharpEmu.Libs/SystemGesture/SystemGestureExports.cs

@@ -0,0 +1,75 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.SystemGesture;
+
+public static class SystemGestureExports
+{
+    [SysAbiExport(
+        Nid = "3pcAvmwKCvM",
+        ExportName = "sceSystemGestureInitializePrimitiveTouchRecognizer",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemGesture")]
+    public static int SystemGestureInitializePrimitiveTouchRecognizer(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "FWF8zkhr854",
+        ExportName = "sceSystemGestureCreateTouchRecognizer",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemGesture")]
+    public static int SystemGestureCreateTouchRecognizer(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "qpo-mEOwje0",
+        ExportName = "sceSystemGestureOpen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemGesture")]
+    public static int SystemGestureOpen(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "GgFMb22sbbI",
+        ExportName = "sceSystemGestureUpdatePrimitiveTouchRecognizer",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemGesture")]
+    public static int SystemGestureUpdatePrimitiveTouchRecognizer(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "j4h82CQWENo",
+        ExportName = "sceSystemGestureUpdateTouchRecognizer",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemGesture")]
+    public static int SystemGestureUpdateTouchRecognizer(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "h8uongcBNVs",
+        ExportName = "sceSystemGestureGetTouchEventsCount",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemGesture")]
+    public static int SystemGestureGetTouchEventsCount(CpuContext ctx)
+    {
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+}

src/SharpEmu.Libs/SystemService/SystemServiceExports.cs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 using SharpEmu.HLE;
+using SharpEmu.Libs.VideoOut;
 using System.Buffers.Binary;
 
 namespace SharpEmu.Libs.SystemService;
@@ -12,6 +13,34 @@ public static class SystemServiceExports
     private const int SystemServiceStatusSize = 0x0C;
     private const int DisplaySafeAreaInfoSize = sizeof(float) + 128;
 
+    [SysAbiExport(
+        Nid = "fZo48un7LK4",
+        ExportName = "sceSystemServiceParamGetInt",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemService")]
+    public static int SystemServiceParamGetInt(CpuContext ctx)
+    {
+        var parameterId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var valueAddress = ctx[CpuRegister.Rsi];
+        if (valueAddress == 0)
+        {
+            return SetReturn(ctx, OrbisSystemServiceErrorParameter);
+        }
+
+        var value = parameterId switch
+        {
+            1 or 2 or 3 or 1000 => 1,
+            4 => 180,
+            _ => 0,
+        };
+
+        Span<byte> valueBytes = stackalloc byte[sizeof(int)];
+        BinaryPrimitives.WriteInt32LittleEndian(valueBytes, value);
+        return ctx.Memory.TryWrite(valueAddress, valueBytes)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
     [SysAbiExport(
         Nid = "rPo6tV8D9bM",
         ExportName = "sceSystemServiceGetStatus",
@@ -57,6 +86,17 @@ public static class SystemServiceExports
             : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
     }
 
+    [SysAbiExport(
+        Nid = "Vo5V8KAwCmk",
+        ExportName = "sceSystemServiceHideSplashScreen",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceSystemService")]
+    public static int SystemServiceHideSplashScreen(CpuContext ctx)
+    {
+        VulkanVideoPresenter.HideSplashScreen();
+        return SetReturn(ctx, 0);
+    }
+
     private static int SetReturn(CpuContext ctx, int result)
     {
         ctx[CpuRegister.Rax] = unchecked((ulong)result);

src/SharpEmu.Libs/UserService/UserServiceExports.cs

@@ -3,14 +3,21 @@
 
 using SharpEmu.HLE;
 using System.Buffers.Binary;
+using System.Text;
+using System.Threading;
 
 namespace SharpEmu.Libs.UserService;
 
 public static class UserServiceExports
 {
     private const int OrbisUserServiceErrorInvalidArgument = unchecked((int)0x80960005);
+    private const int OrbisUserServiceErrorNoEvent = unchecked((int)0x80960007);
+    private const int OrbisUserServiceErrorInvalidParameter = unchecked((int)0x80960009);
+    private const int OrbisUserServiceErrorBufferTooShort = unchecked((int)0x8096000A);
     private const int PrimaryUserId = 1;
     private const int InvalidUserId = -1;
+    private const string PrimaryUserName = "SharpEmu";
+    private static int _loginEventDelivered;
 
     [SysAbiExport(
         Nid = "j3YMu1MVNNo",
@@ -64,6 +71,89 @@ public static class UserServiceExports
             : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
     }
 
+    [SysAbiExport(
+        Nid = "yH17Q6NWtVg",
+        ExportName = "sceUserServiceGetEvent",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceUserService")]
+    public static int UserServiceGetEvent(CpuContext ctx)
+    {
+        var eventAddress = ctx[CpuRegister.Rdi];
+        if (eventAddress == 0)
+        {
+            return SetReturn(ctx, OrbisUserServiceErrorInvalidArgument);
+        }
+
+        if (Interlocked.Exchange(ref _loginEventDelivered, 1) != 0)
+        {
+            return SetReturn(ctx, OrbisUserServiceErrorNoEvent);
+        }
+
+        Span<byte> payload = stackalloc byte[sizeof(int) * 2];
+        BinaryPrimitives.WriteInt32LittleEndian(payload[0..], 0);
+        BinaryPrimitives.WriteInt32LittleEndian(payload[sizeof(int)..], PrimaryUserId);
+        return ctx.Memory.TryWrite(eventAddress, payload)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "1xxcMiGu2fo",
+        ExportName = "sceUserServiceGetUserName",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceUserService")]
+    public static int UserServiceGetUserName(CpuContext ctx)
+    {
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var nameAddress = ctx[CpuRegister.Rsi];
+        var capacity = ctx[CpuRegister.Rdx];
+        if (userId != PrimaryUserId)
+        {
+            return SetReturn(ctx, OrbisUserServiceErrorInvalidParameter);
+        }
+
+        if (nameAddress == 0)
+        {
+            return SetReturn(ctx, OrbisUserServiceErrorInvalidArgument);
+        }
+
+        var nameBytes = Encoding.UTF8.GetBytes(PrimaryUserName);
+        if (capacity <= (ulong)nameBytes.Length)
+        {
+            return SetReturn(ctx, OrbisUserServiceErrorBufferTooShort);
+        }
+
+        Span<byte> output = stackalloc byte[nameBytes.Length + 1];
+        nameBytes.CopyTo(output);
+        return ctx.Memory.TryWrite(nameAddress, output)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
+    [SysAbiExport(
+        Nid = "D-CzAxQL0XI",
+        ExportName = "sceUserServiceGetPlatformPrivacySetting",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceUserService")]
+    public static int UserServiceGetPlatformPrivacySetting(CpuContext ctx)
+    {
+        var parameterId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var valueAddress = ctx[CpuRegister.Rsi];
+        if (parameterId != 1000)
+        {
+            return SetReturn(ctx, OrbisUserServiceErrorInvalidParameter);
+        }
+
+        if (valueAddress == 0)
+        {
+            return SetReturn(ctx, OrbisUserServiceErrorInvalidArgument);
+        }
+
+        return TryWriteInt32(ctx, valueAddress, 0)
+            ? SetReturn(ctx, 0)
+            : SetReturn(ctx, (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+    }
+
     private static bool TryWriteInt32(CpuContext ctx, ulong address, int value)
     {
         Span<byte> bytes = stackalloc byte[sizeof(int)];

src/SharpEmu.Libs/VideoOut/PngSplashLoader.cs

@@ -0,0 +1,213 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Buffers.Binary;
+using System.IO.Compression;
+
+namespace SharpEmu.Libs.VideoOut;
+
+internal static class PngSplashLoader
+{
+    private static ReadOnlySpan<byte> PngSignature =>
+    [
+        0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A,
+    ];
+
+    public static bool TryLoad(out byte[] pixels, out uint width, out uint height)
+    {
+        pixels = [];
+        width = 0;
+        height = 0;
+
+        try
+        {
+            var app0Root = Environment.GetEnvironmentVariable("SHARPEMU_APP0_DIR");
+            if (string.IsNullOrWhiteSpace(app0Root))
+            {
+                return false;
+            }
+
+            var path = Path.Combine(app0Root, "sce_sys", "pic0.png");
+            if (!File.Exists(path))
+            {
+                return false;
+            }
+
+            return TryDecode(File.ReadAllBytes(path), out pixels, out width, out height);
+        }
+        catch
+        {
+            pixels = [];
+            width = 0;
+            height = 0;
+            return false;
+        }
+    }
+
+    private static bool TryDecode(
+        ReadOnlySpan<byte> png,
+        out byte[] pixels,
+        out uint width,
+        out uint height)
+    {
+        pixels = [];
+        width = 0;
+        height = 0;
+        if (png.Length < 33 || !png[..8].SequenceEqual(PngSignature))
+        {
+            return false;
+        }
+
+        byte bitDepth = 0;
+        byte colorType = 0;
+        byte interlace = 0;
+        using var compressed = new MemoryStream();
+        var offset = 8;
+        while (offset <= png.Length - 12)
+        {
+            var chunkLength = BinaryPrimitives.ReadUInt32BigEndian(png.Slice(offset, 4));
+            if (chunkLength > int.MaxValue || offset > png.Length - 12 - (int)chunkLength)
+            {
+                return false;
+            }
+
+            var chunkType = png.Slice(offset + 4, 4);
+            var chunkData = png.Slice(offset + 8, (int)chunkLength);
+            if (chunkType.SequenceEqual("IHDR"u8))
+            {
+                if (chunkData.Length != 13)
+                {
+                    return false;
+                }
+
+                width = BinaryPrimitives.ReadUInt32BigEndian(chunkData[..4]);
+                height = BinaryPrimitives.ReadUInt32BigEndian(chunkData.Slice(4, 4));
+                bitDepth = chunkData[8];
+                colorType = chunkData[9];
+                interlace = chunkData[12];
+            }
+            else if (chunkType.SequenceEqual("IDAT"u8))
+            {
+                compressed.Write(chunkData);
+            }
+            else if (chunkType.SequenceEqual("IEND"u8))
+            {
+                break;
+            }
+
+            offset += checked((int)chunkLength + 12);
+        }
+
+        var sourceBytesPerPixel = colorType switch
+        {
+            2 => 3,
+            6 => 4,
+            _ => 0,
+        };
+        if (width == 0 ||
+            height == 0 ||
+            width > 16384 ||
+            height > 16384 ||
+            bitDepth != 8 ||
+            interlace != 0 ||
+            sourceBytesPerPixel == 0 ||
+            compressed.Length == 0)
+        {
+            return false;
+        }
+
+        var stride = checked((int)width * sourceBytesPerPixel);
+        var scanlineLength = checked(stride + 1);
+        var decompressedLength = checked(scanlineLength * (int)height);
+        var scanlines = GC.AllocateUninitializedArray<byte>(decompressedLength);
+        compressed.Position = 0;
+        using (var zlib = new ZLibStream(compressed, CompressionMode.Decompress))
+        {
+            zlib.ReadExactly(scanlines);
+            if (zlib.ReadByte() != -1)
+            {
+                return false;
+            }
+        }
+
+        var reconstructed = GC.AllocateUninitializedArray<byte>(checked(stride * (int)height));
+        for (var y = 0; y < (int)height; y++)
+        {
+            var sourceLine = scanlines.AsSpan(y * scanlineLength + 1, stride);
+            var targetLine = reconstructed.AsSpan(y * stride, stride);
+            var previousLine = y == 0
+                ? ReadOnlySpan<byte>.Empty
+                : reconstructed.AsSpan((y - 1) * stride, stride);
+            if (!TryUnfilter(
+                    scanlines[y * scanlineLength],
+                    sourceLine,
+                    previousLine,
+                    targetLine,
+                    sourceBytesPerPixel))
+            {
+                return false;
+            }
+        }
+
+        pixels = GC.AllocateUninitializedArray<byte>(checked((int)width * (int)height * 4));
+        for (int sourceOffset = 0, targetOffset = 0;
+             sourceOffset < reconstructed.Length;
+             sourceOffset += sourceBytesPerPixel, targetOffset += 4)
+        {
+            pixels[targetOffset] = reconstructed[sourceOffset + 2];
+            pixels[targetOffset + 1] = reconstructed[sourceOffset + 1];
+            pixels[targetOffset + 2] = reconstructed[sourceOffset];
+            pixels[targetOffset + 3] = sourceBytesPerPixel == 4
+                ? reconstructed[sourceOffset + 3]
+                : (byte)0xFF;
+        }
+
+        return true;
+    }
+
+    private static bool TryUnfilter(
+        byte filter,
+        ReadOnlySpan<byte> source,
+        ReadOnlySpan<byte> previous,
+        Span<byte> target,
+        int bytesPerPixel)
+    {
+        for (var x = 0; x < source.Length; x++)
+        {
+            var left = x >= bytesPerPixel ? target[x - bytesPerPixel] : (byte)0;
+            var above = previous.IsEmpty ? (byte)0 : previous[x];
+            var upperLeft = !previous.IsEmpty && x >= bytesPerPixel
+                ? previous[x - bytesPerPixel]
+                : (byte)0;
+            target[x] = filter switch
+            {
+                0 => source[x],
+                1 => unchecked((byte)(source[x] + left)),
+                2 => unchecked((byte)(source[x] + above)),
+                3 => unchecked((byte)(source[x] + ((left + above) >> 1))),
+                4 => unchecked((byte)(source[x] + Paeth(left, above, upperLeft))),
+                _ => source[x],
+            };
+
+            if (filter > 4)
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private static byte Paeth(byte left, byte above, byte upperLeft)
+    {
+        var estimate = left + above - upperLeft;
+        var leftDistance = Math.Abs(estimate - left);
+        var aboveDistance = Math.Abs(estimate - above);
+        var upperLeftDistance = Math.Abs(estimate - upperLeft);
+        return leftDistance <= aboveDistance && leftDistance <= upperLeftDistance
+            ? left
+            : aboveDistance <= upperLeftDistance
+                ? above
+                : upperLeft;
+    }
+}

src/SharpEmu.Libs/VideoOut/VideoOutExports.cs

@@ -4,6 +4,7 @@
 using SharpEmu.HLE;
 using SharpEmu.Libs.Kernel;
 using System.Buffers.Binary;
+using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Threading;
 
@@ -29,8 +30,11 @@ public static class VideoOutExports
     private const int VideoOutBufferAttributeSize = 0x28;
     private const int VideoOutBufferAttribute2Size = 0x50;
     private const int VideoOutBuffersEntrySize = 0x20;
+    private const int VideoOutOutputStatusSize = 0x30;
     private const ulong SceVideoOutPixelFormatA8R8G8B8Srgb = 0x80000000;
     private const ulong SceVideoOutPixelFormatA8B8G8R8Srgb = 0x80002200;
+    private const ulong SceVideoOutPixelFormatB8G8R8A8Unorm = 0x8100000000000000;
+    private const ulong SceVideoOutPixelFormatR8G8B8A8Unorm = 0x8100000022000000;
     private const ulong SceVideoOutPixelFormatA2R10G10B10 = 0x88060000;
     private const ulong SceVideoOutPixelFormatA2R10G10B10Srgb = 0x88000000;
     private const ulong SceVideoOutPixelFormatA2R10G10B10Bt2020Pq = 0x88740000;
@@ -45,6 +49,13 @@ public static class VideoOutExports
     private static int _frameDumpCount;
     private static long _nextFrameDumpIndex;
     private static string _windowTitle = "SharpEmu VideoOut";
+    private static readonly bool _logFrameRate = string.Equals(
+        Environment.GetEnvironmentVariable("SHARPEMU_LOG_VIDEOOUT_FPS"),
+        "1",
+        StringComparison.Ordinal);
+    private static long _frameRateWindowStart = Stopwatch.GetTimestamp();
+    private static long _submittedFrameCount;
+    private static long _presentedFrameCount;
 
     public static void ConfigureApplicationInfo(string? title, string? titleId, string? version)
     {
@@ -82,6 +93,10 @@ public static class VideoOutExports
         public ulong VblankCount { get; set; }
         public ulong FlipCount { get; set; }
         public int CurrentBuffer { get; set; } = -1;
+        public uint OutputWidth { get; set; } = 1920;
+        public uint OutputHeight { get; set; } = 1080;
+        public uint RefreshRate { get; set; } = 60;
+        public float Gamma { get; set; } = 1.0f;
         public VideoOutBufferGroup?[] Groups { get; } = new VideoOutBufferGroup?[MaxDisplayBufferGroups];
         public VideoOutBufferSlot[] BufferSlots { get; } = CreateBufferSlots();
         public List<FlipEventRegistration> FlipEvents { get; } = new();
@@ -196,6 +211,93 @@ public static class VideoOutExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "utPrVdxio-8",
+        ExportName = "sceVideoOutGetOutputStatus",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceVideoOut")]
+    public static int VideoOutGetOutputStatus(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        var statusAddress = ctx[CpuRegister.Rsi];
+        if (statusAddress == 0)
+        {
+            return OrbisVideoOutErrorInvalidAddress;
+        }
+
+        if (!TryGetPort(handle, out var port))
+        {
+            return OrbisVideoOutErrorInvalidHandle;
+        }
+
+        Span<byte> status = stackalloc byte[VideoOutOutputStatusSize];
+        status.Clear();
+        var resolutionClass = port.OutputWidth >= 3840 || port.OutputHeight >= 2160 ? 2 : 1;
+        BinaryPrimitives.WriteInt32LittleEndian(status[0x00..0x04], resolutionClass);
+        BinaryPrimitives.WriteInt32LittleEndian(status[0x04..0x08], 1);
+        BinaryPrimitives.WriteUInt64LittleEndian(status[0x08..0x10], port.RefreshRate);
+        return ctx.Memory.TryWrite(statusAddress, status)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "DYhhWbJSeRg",
+        ExportName = "sceVideoOutColorSettingsSetGamma_",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceVideoOut")]
+    public static int VideoOutColorSettingsSetGamma(CpuContext ctx)
+    {
+        var settingsAddress = ctx[CpuRegister.Rdi];
+        if (settingsAddress == 0)
+        {
+            return OrbisVideoOutErrorInvalidAddress;
+        }
+
+        ctx.GetXmmRegister(0, out var xmm0Low, out _);
+        var gamma = BitConverter.Int32BitsToSingle(unchecked((int)xmm0Low));
+        if (!float.IsFinite(gamma) || gamma is < 0.1f or > 2.0f)
+        {
+            return OrbisVideoOutErrorInvalidValue;
+        }
+
+        Span<byte> gammaBytes = stackalloc byte[sizeof(float)];
+        BinaryPrimitives.WriteInt32LittleEndian(gammaBytes, BitConverter.SingleToInt32Bits(gamma));
+        return ctx.Memory.TryWrite(settingsAddress, gammaBytes)
+            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
+            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+    }
+
+    [SysAbiExport(
+        Nid = "pv9CI5VC+R0",
+        ExportName = "sceVideoOutAdjustColor_",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceVideoOut")]
+    public static int VideoOutAdjustColor(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        var settingsAddress = ctx[CpuRegister.Rsi];
+        if (settingsAddress == 0)
+        {
+            return OrbisVideoOutErrorInvalidAddress;
+        }
+
+        if (!TryGetPort(handle, out var port))
+        {
+            return OrbisVideoOutErrorInvalidHandle;
+        }
+
+        Span<byte> gammaBytes = stackalloc byte[sizeof(float)];
+        if (!ctx.Memory.TryRead(settingsAddress, gammaBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        port.Gamma = BitConverter.Int32BitsToSingle(
+            BinaryPrimitives.ReadInt32LittleEndian(gammaBytes));
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "j6RaAUlaLv0",
         ExportName = "sceVideoOutWaitVblank",
@@ -266,7 +368,24 @@ public static class VideoOutExports
         var bufferIndex = unchecked((int)ctx[CpuRegister.Rsi]);
         var flipMode = unchecked((int)ctx[CpuRegister.Rdx]);
         var flipArg = unchecked((long)ctx[CpuRegister.Rcx]);
-        return SubmitFlip(ctx, handle, bufferIndex, flipMode, flipArg);
+        return SubmitFlip(ctx, handle, bufferIndex, flipMode, flipArg, submitGpuImage: true);
+    }
+
+    [SysAbiExport(
+        Nid = "zgXifHT9ErY",
+        ExportName = "sceVideoOutIsFlipPending",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceVideoOut")]
+    public static int VideoOutIsFlipPending(CpuContext ctx)
+    {
+        var handle = unchecked((int)ctx[CpuRegister.Rdi]);
+        if (!TryGetPort(handle, out _))
+        {
+            return OrbisVideoOutErrorInvalidHandle;
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
     [SysAbiExport(
@@ -329,7 +448,7 @@ public static class VideoOutExports
     }
 
     public static int SubmitFlipFromAgc(CpuContext ctx, int handle, int bufferIndex, int flipMode, long flipArg) =>
-        SubmitFlip(ctx, handle, bufferIndex, flipMode, flipArg);
+        SubmitFlip(ctx, handle, bufferIndex, flipMode, flipArg, submitGpuImage: false);
 
     internal static void SubmitHostRgbaFrame(ReadOnlySpan<byte> rgbaFrame, uint width, uint height)
     {
@@ -637,7 +756,13 @@ public static class VideoOutExports
         return groupIndex < 0 ? groupIndex : setIndex;
     }
 
-    private static int SubmitFlip(CpuContext ctx, int handle, int bufferIndex, int flipMode, long flipArg)
+    private static int SubmitFlip(
+        CpuContext ctx,
+        int handle,
+        int bufferIndex,
+        int flipMode,
+        long flipArg,
+        bool submitGpuImage)
     {
         if (!TryGetPort(handle, out var port))
         {
@@ -665,6 +790,17 @@ public static class VideoOutExports
             flipEvents = new List<FlipEventRegistration>(port.FlipEvents);
         }
 
+        if (submitGpuImage &&
+            bufferIndex >= 0 &&
+            TryGetDisplayBufferInfo(handle, bufferIndex, out var displayBuffer))
+        {
+            _ = VulkanVideoPresenter.TrySubmitGuestImage(
+                displayBuffer.Address,
+                displayBuffer.Width,
+                displayBuffer.Height,
+                displayBuffer.PitchInPixel);
+        }
+
         if (string.Equals(
                 Environment.GetEnvironmentVariable("SHARPEMU_DUMP_VIDEOOUT"),
                 "1",
@@ -684,9 +820,46 @@ public static class VideoOutExports
         }
 
         TraceVideoOut($"videoout.submit_flip handle={handle} index={bufferIndex} mode={flipMode} arg={flipArg} events={flipEvents.Count}");
+        ReportFrameRate(presented: false);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    internal static void ReportPresentedFrame() =>
+        ReportFrameRate(presented: true);
+
+    private static void ReportFrameRate(bool presented)
+    {
+        if (!_logFrameRate)
+        {
+            return;
+        }
+
+        if (presented)
+        {
+            Interlocked.Increment(ref _presentedFrameCount);
+        }
+        else
+        {
+            Interlocked.Increment(ref _submittedFrameCount);
+        }
+
+        var started = Volatile.Read(ref _frameRateWindowStart);
+        var now = Stopwatch.GetTimestamp();
+        var elapsedTicks = now - started;
+        if (elapsedTicks < Stopwatch.Frequency ||
+            Interlocked.CompareExchange(ref _frameRateWindowStart, now, started) != started)
+        {
+            return;
+        }
+
+        var elapsedSeconds = (double)elapsedTicks / Stopwatch.Frequency;
+        var submitted = Interlocked.Exchange(ref _submittedFrameCount, 0);
+        var presentedCount = Interlocked.Exchange(ref _presentedFrameCount, 0);
+        Console.Error.WriteLine(
+            $"[LOADER][PERF] videoout submitted_fps={submitted / elapsedSeconds:F1} " +
+            $"presented_fps={presentedCount / elapsedSeconds:F1}");
+    }
+
     private static int RegisterBufferRange(VideoOutPortState port, int startIndex, ReadOnlySpan<ulong> addresses, BufferAttribute attribute, int requestedGroupIndex = -1)
     {
         lock (_stateGate)
@@ -715,6 +888,8 @@ public static class VideoOutExports
                 Index = groupIndex,
                 Attribute = attribute,
             };
+            port.OutputWidth = attribute.Width;
+            port.OutputHeight = attribute.Height;
 
             for (var i = 0; i < addresses.Length; i++)
             {
@@ -726,6 +901,7 @@ public static class VideoOutExports
 
             TraceVideoOut(
                 $"videoout.register_buffers handle={port.Handle} group={groupIndex} start={startIndex} count={addresses.Length} fmt=0x{attribute.PixelFormat:X} tile={attribute.TilingMode} {attribute.Width}x{attribute.Height} pitch={attribute.PitchInPixel}");
+            VulkanVideoPresenter.EnsureStarted(attribute.Width, attribute.Height);
             return groupIndex;
         }
     }
@@ -939,6 +1115,8 @@ public static class VideoOutExports
     private static uint GetBytesPerPixel(ulong pixelFormat) =>
         pixelFormat is SceVideoOutPixelFormatA8R8G8B8Srgb or
             SceVideoOutPixelFormatA8B8G8R8Srgb or
+            SceVideoOutPixelFormatB8G8R8A8Unorm or
+            SceVideoOutPixelFormatR8G8B8A8Unorm or
             SceVideoOutPixelFormatA2R10G10B10 or
             SceVideoOutPixelFormatA2R10G10B10Srgb or
             SceVideoOutPixelFormatA2R10G10B10Bt2020Pq
@@ -973,7 +1151,7 @@ public static class VideoOutExports
         var dst = 0;
         for (var src = 0; src + 3 < source.Length; src += 4)
         {
-            if (pixelFormat == SceVideoOutPixelFormatA8B8G8R8Srgb)
+            if (pixelFormat is SceVideoOutPixelFormatA8B8G8R8Srgb or SceVideoOutPixelFormatR8G8B8A8Unorm)
             {
                 destination[dst++] = source[src + 0];
                 destination[dst++] = source[src + 1];

src/SharpEmu.Libs/packages.lock.json

@@ -11,6 +11,16 @@
           "Silk.NET.Core": "2.23.0"
         }
       },
+      "Silk.NET.Vulkan.Extensions.EXT": {
+        "type": "Direct",
+        "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": "Direct",
         "requested": "[2.23.0, )",