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sharpemu/src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.Imports.cs
T
Berk a030cb5a5d Gpu runtime stalls (#410) 
* [runtime] restore default GC mode

* [cpu] add string leaf stubs

* [ampr] allow concurrent reads

* [bink] keep guest decode path

* [kernel] streamline host memory access

* [shader] add scalar memory fallback

* [gpu] bound guest data pool

* [gpu] reduce queue stalls

* [video] stabilize guest resources

* revert lock file
2026-07-19 00:31:50 +03:00

2337 lines
76 KiB
C#
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// Copyright (C) 2026 SharpEmu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
using System;
using System.Buffers.Binary;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using SharpEmu.Core.Cpu.Debugging;
using SharpEmu.Core.Cpu;
using SharpEmu.HLE;
using SharpEmu.Libs.Kernel;
namespace SharpEmu.Core.Cpu.Native;
public sealed partial class DirectExecutionBackend
{
// The native import trampoline keeps the original guest GPR stack layout at
// argPackPtr and stores volatile SysV-only state immediately below it. This
// lets the managed gateway observe AL (the variadic vector-argument count)
// and all eight vector argument registers without changing the return-slot
// offsets used by the guest scheduler.
private const int ImportSavedRaxOffset = -176;
private const int ImportSavedR10Offset = -168;
private const int ImportSavedR11Offset = -160;
private const int ImportSavedMxcsrOffset = -152;
private const int ImportSavedFpuControlOffset = -148;
private const int ImportSavedXmmOffset = -128;
private const int ImportVectorRegisterCount = 8;
private const ulong StackCheckGuardValue = 0xC0DEC0DECAFEBA00UL;
private static long _canaryReturnRecoveries;
private readonly object _importResultLogSampleGate = new();
private readonly Dictionary<string, int> _importResultLogSamples = new(StringComparer.Ordinal);
private int _il2CppExceptionDiagnosticCount;
private static ulong ImportDispatchGatewayManaged(nint backendHandle, int importIndex, nint argPackPtr)
{
try
{
if (!(GCHandle.FromIntPtr(backendHandle).Target is DirectExecutionBackend directExecutionBackend))
{
Console.Error.WriteLine(
$"[LOADER][ERROR] ImportDispatchGatewayManaged: invalid backend handle 0x{backendHandle:X16}");
return 18446744071562199042uL;
}
if (_perfHleHistogram)
{
var startTicks = System.Diagnostics.Stopwatch.GetTimestamp();
var r = directExecutionBackend.DispatchImport(importIndex, argPackPtr);
RecordPerfHleDispatchTime(System.Diagnostics.Stopwatch.GetTimestamp() - startTicks);
return r;
}
return directExecutionBackend.DispatchImport(importIndex, argPackPtr);
}
catch (Exception ex)
{
Console.Error.WriteLine(
$"[LOADER][ERROR] ImportDispatchGatewayManaged exception: {ex.GetType().Name}: {ex.Message}");
return 18446744071562199298uL;
}
}
private unsafe static int RawVectoredHandlerManaged(void* exceptionInfo)
{
return TryRecoverUnresolvedSentinel(exceptionInfo);
}
private unsafe static int RawUnhandledFilterManaged(void* exceptionInfo)
{
return TryRecoverUnresolvedSentinel(exceptionInfo);
}
private unsafe static int TryRecoverUnresolvedSentinel(void* exceptionInfo)
{
EXCEPTION_RECORD* exceptionRecord = ((EXCEPTION_POINTERS*)exceptionInfo)->ExceptionRecord;
if (exceptionRecord->ExceptionCode != 3221225477u)
{
return 0;
}
void* contextRecord = ((EXCEPTION_POINTERS*)exceptionInfo)->ContextRecord;
ulong value = ReadCtxU64(contextRecord, 248);
ulong value2 = (ulong)exceptionRecord->ExceptionAddress;
if (value == StackCheckGuardValue && TryRecoverCanaryReturn(contextRecord))
{
return -1;
}
if (!IsUnresolvedSentinel(value) && !IsUnresolvedSentinel(value2))
{
return 0;
}
ulong rsp = ReadCtxU64(contextRecord, 152);
WriteCtxU64(contextRecord, 120, 0uL);
if (TryGetPlausibleReturnFromStack(rsp, out var returnRip, out var nextRsp))
{
WriteCtxU64(contextRecord, 152, nextRsp);
WriteCtxU64(contextRecord, 248, returnRip);
Interlocked.Increment(ref _rawSentinelRecoveries);
return -1;
}
return 0;
}
private unsafe static bool TryRecoverCanaryReturn(void* contextRecord)
{
var rsp = ReadCtxU64(contextRecord, CTX_RSP);
var interruptedReturn = ReadCtxU64(contextRecord, CTX_RBP);
var interruptedFrame = rsp + 0x18;
if (!IsLikelyReturnAddress(interruptedReturn) ||
rsp < sizeof(ulong) ||
!TryReadStackU64(interruptedFrame, out var callerRbp) ||
!TryReadStackU64(rsp + 0x20, out var callerReturn) ||
callerRbp <= rsp || callerRbp - rsp > 0x10000 ||
!IsLikelyReturnAddress(callerReturn))
{
return false;
}
// The guest unwind reached this callback return one stack slot late: the
// final pop loaded the interrupted return into rbp and ret consumed the
// stack guard. Resume at that return with the outer frame pointer rebuilt
// from the still-intact caller frame on the stack.
WriteCtxU64(contextRecord, CTX_RBP, interruptedFrame);
WriteCtxU64(contextRecord, CTX_RSP, rsp - sizeof(ulong));
WriteCtxU64(contextRecord, CTX_RIP, interruptedReturn);
var recoveryCount = Interlocked.Increment(ref _canaryReturnRecoveries);
if (recoveryCount <= 4 || recoveryCount % 1000 == 0)
{
Console.Error.WriteLine(
$"[LOADER][WARN] Recovered malformed canary return #{recoveryCount}: " +
$"resume=0x{interruptedReturn:X16} rsp=0x{rsp - sizeof(ulong):X16} " +
$"rbp=0x{interruptedFrame:X16} caller_rbp=0x{callerRbp:X16} " +
$"caller=0x{callerReturn:X16}");
Console.Error.Flush();
}
return true;
}
private unsafe ulong DispatchImport(int importIndex, nint argPackPtr)
{
long num = NextImportDispatchIndex();
if ((num & 0x3F) == 0)
{
MarkExecutionProgress();
}
var cpuContext = ActiveCpuContext;
if (cpuContext == null)
{
LastError = "Import dispatch called without active CPU context";
return 18446744071562199298uL;
}
if ((uint)importIndex >= (uint)_importEntries.Length)
{
LastError = $"Import dispatch index out of range: {importIndex}";
return 18446744071562199042uL;
}
ImportStubEntry importStubEntry = _importEntries[importIndex];
if (_perfHleHistogram)
{
RecordPerfHleCall(importStubEntry.Export?.Name ?? importStubEntry.Nid);
}
int num2 = Volatile.Read(in _rawSentinelRecoveries);
if (num2 != _lastReportedRawSentinelRecoveries)
{
Console.Error.WriteLine($"[LOADER][TRACE] Raw sentinel recoveries: {num2} (last import index={importIndex})");
_lastReportedRawSentinelRecoveries = num2;
}
if (importStubEntry.IsLeaf &&
TryDispatchLeafImport(cpuContext, importStubEntry, argPackPtr, num, out var leafResult))
{
return leafResult;
}
cpuContext.Rip = importStubEntry.Address;
LoadImportVolatileArguments(cpuContext, argPackPtr);
cpuContext[CpuRegister.Rdi] = *(ulong*)argPackPtr;
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;
ulong value = cpuContext[CpuRegister.Rdi];
ulong value2 = cpuContext[CpuRegister.Rsi];
ulong num3 = cpuContext[CpuRegister.Rdx];
ulong num4 = cpuContext[CpuRegister.Rcx];
ulong num5 = cpuContext[CpuRegister.R8];
ulong num6 = cpuContext[CpuRegister.R9];
ulong value3 = cpuContext[CpuRegister.Rbx];
ulong value4 = cpuContext[CpuRegister.Rbp];
ulong value5 = cpuContext[CpuRegister.R12];
ulong value6 = cpuContext[CpuRegister.R13];
ulong value7 = cpuContext[CpuRegister.R14];
ulong value8 = cpuContext[CpuRegister.R15];
ulong num7 = *(ulong*)(argPackPtr + 96);
var importStackPointer = (ulong)argPackPtr + 96;
var probeTarget = (_probeImportReturnAddress != 0 && num7 == _probeImportReturnAddress) ||
(string.Equals(importStubEntry.Nid, "2Z+PpY6CaJg", StringComparison.Ordinal) &&
importStackPointer >= 0x00006FFFAC1FF000UL &&
importStackPointer < 0x00006FFFAC200000UL);
if (probeTarget &&
Interlocked.Increment(ref _probeImportReturnAddressCount) <= 2048)
{
var frameValue = TryReadStackU64(value4, out var savedRbp) ? savedRbp : 0;
var frameReturn = TryReadStackU64(value4 + sizeof(ulong), out var savedReturn)
? savedReturn
: 0;
Console.Error.WriteLine(
$"[LOADER][TRACE] import-return-address-probe " +
$"thread=0x{GuestThreadExecution.CurrentGuestThreadHandle:X16} " +
$"nid={importStubEntry.Nid} ret=0x{num7:X16} " +
$"rsp=0x{(ulong)argPackPtr + 96:X16} rbp=0x{value4:X16} " +
$"saved_rbp=0x{frameValue:X16} saved_ret=0x{frameReturn:X16}");
}
var isGuestWorker = GuestThreadExecution.IsGuestThread;
if (!IsLikelyReturnAddress(num7))
{
for (int i = 1; i <= 4; i++)
{
ulong num8 = *(ulong*)(argPackPtr + 96 + i * 8);
if (IsLikelyReturnAddress(num8))
{
*(ulong*)(argPackPtr + 96) = num8;
num7 = num8;
Console.Error.WriteLine($"[LOADER][WARNING] Import#{num}: corrected suspicious return RIP using stack slot +0x{i * 8:X} -> 0x{num7:X16}");
break;
}
}
}
// Diagnostic compatibility escape hatch for a guest stack-protector
// failure whose noreturn call is immediately followed by UD2. Returning
// normally from the HLE export would execute that UD2; redirect this one
// well-known compiler epilogue back through its register/stack unwind.
// Keep the byte-pattern check strict so the opt-in cannot guess at an
// unrelated function layout.
if (string.Equals(importStubEntry.Nid, "Ou3iL1abvng", StringComparison.Ordinal) &&
string.Equals(
Environment.GetEnvironmentVariable("SHARPEMU_IGNORE_STACK_CHK"),
"1",
StringComparison.Ordinal) &&
num7 >= 0x20)
{
var returnCode = (byte*)num7;
if (returnCode[0] == 0x0F && returnCode[1] == 0x0B &&
returnCode[-22] == 0x75 && returnCode[-21] == 0x0F &&
returnCode[-20] == 0x48 && returnCode[-19] == 0x83 &&
returnCode[-18] == 0xC4)
{
var recoveredReturn = num7 - 20;
*(ulong*)(argPackPtr + 96) = recoveredReturn;
cpuContext[CpuRegister.Rax] = 0;
Console.Error.WriteLine(
$"[LOADER][WARN] Recovered guest stack-check epilogue " +
$"ret=0x{num7:X16} -> 0x{recoveredReturn:X16}");
return 0;
}
}
if (_activeGuestThreadState is { } activeGuestThreadState)
{
Interlocked.Increment(ref activeGuestThreadState.ImportCount);
activeGuestThreadState.LastImportRdi = value;
activeGuestThreadState.LastImportRsi = value2;
activeGuestThreadState.LastImportRdx = num3;
activeGuestThreadState.LastImportRcx = num4;
activeGuestThreadState.LastImportR8 = num5;
activeGuestThreadState.LastImportR9 = num6;
activeGuestThreadState.LastImportStack0 = ReadImportStackArgument(argPackPtr, 0);
activeGuestThreadState.LastImportStack1 = ReadImportStackArgument(argPackPtr, 1);
activeGuestThreadState.LastImportStack2 = ReadImportStackArgument(argPackPtr, 2);
activeGuestThreadState.LastImportStack3 = ReadImportStackArgument(argPackPtr, 3);
activeGuestThreadState.LastImportStack4 = ReadImportStackArgument(argPackPtr, 4);
activeGuestThreadState.LastImportStack5 = ReadImportStackArgument(argPackPtr, 5);
Volatile.Write(ref activeGuestThreadState.LastImportResultValid, 0);
Volatile.Write(ref activeGuestThreadState.LastReturnRip, num7);
// Publish the NID last so readers cannot pair a new import name with
// the preceding import's argument snapshot.
Volatile.Write(ref activeGuestThreadState.LastImportNid, importStubEntry.Nid);
}
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)) &&
Interlocked.Increment(ref _probeImportReturnAddressCount) <= 8)
{
ProbeReturnRip(num7, num);
}
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))
{
symbolText = sym;
}
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 (!isGuestWorker &&
!ActiveForcedGuestExit &&
ShouldForceGuestExitOnImportLoop(in importStubEntry, num7, num, value, value2))
{
// Break before the forced exit so the loop state is still live.
NotifyDebuggerStall(CpuStallKind.ImportLoop, in importStubEntry, num7, num, value, value2);
if (TryForceGuestExitToHostStub(argPackPtr, num, num7, importStubEntry.Nid))
{
cpuContext[CpuRegister.Rax] = 1uL;
return 1uL;
}
}
bool flag0 = importStubEntry.SuppressStrlenTrace;
bool flag = num7 >= 2156221920u && num7 <= 2156225024u;
bool flag2 = num7 >= 2156351360u && num7 <= 2156352080u;
bool flag3 = num >= 1020 && num <= 1040;
bool flag4 = !string.IsNullOrWhiteSpace(_importFilter);
bool flag5 = false;
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)
{
if (flag4)
{
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);
}
bool flag6 = _logAllImports || flag5;
if (!flag0 && (flag6 || periodicTrace))
{
if (matchedExport != null)
{
if (flag6)
{
Console.Error.WriteLine(
$"[LOADER][TRACE] Import#{num}: {matchedExport.LibraryName}:{matchedExport.Name} ({importStubEntry.Nid}) " +
$"rdi=0x{value:X16} rsi=0x{value2:X16} rdx=0x{num3:X16} rcx=0x{num4:X16} ret=0x{num7:X16}");
}
else
{
Console.Error.WriteLine($"[LOADER][TRACE] Import#{num}: {matchedExport.LibraryName}:{matchedExport.Name} ({importStubEntry.Nid})");
}
}
else
{
if (flag6)
{
Console.Error.WriteLine(
$"[LOADER][TRACE] Import#{num}: {importStubEntry.Nid} " +
$"rdi=0x{value:X16} rsi=0x{value2:X16} rdx=0x{num3:X16} rcx=0x{num4:X16} ret=0x{num7:X16}");
}
else
{
Console.Error.WriteLine($"[LOADER][TRACE] Import#{num}: {importStubEntry.Nid}");
}
}
if (flag6)
{
Console.Error.Flush();
}
}
if (!flag0 && !isGuestWorker)
{
RecordRecentImportTrace(
num,
importStubEntry.Nid,
num7,
cpuContext[CpuRegister.Rdi],
cpuContext[CpuRegister.Rsi],
cpuContext[CpuRegister.Rdx]);
}
if (importStubEntry.Nid == "8zTFvBIAIN8" && num <= 256)
{
Console.Error.WriteLine($"[LOADER][TRACE] memset#{num}: dst=0x{cpuContext[CpuRegister.Rdi]:X16} val=0x{cpuContext[CpuRegister.Rsi] & 0xFF:X2} len=0x{cpuContext[CpuRegister.Rdx]:X16} ret=0x{num7:X16}");
}
if (importStubEntry.Nid == "tsvEmnenz48" && num <= 64)
{
Console.Error.WriteLine($"[LOADER][TRACE] __cxa_atexit#{num}: func=0x{cpuContext[CpuRegister.Rdi]:X16} arg=0x{cpuContext[CpuRegister.Rsi]:X16} dso=0x{cpuContext[CpuRegister.Rdx]:X16} ret=0x{num7:X16}");
}
if (importStubEntry.Nid == "bzQExy189ZI" || importStubEntry.Nid == "8G2LB+A3rzg")
{
Console.Error.WriteLine($"[LOADER][TRACE] {importStubEntry.Nid}#{num}: rdi=0x{cpuContext[CpuRegister.Rdi]:X16} rsi=0x{cpuContext[CpuRegister.Rsi]:X16} rdx=0x{cpuContext[CpuRegister.Rdx]:X16} ret=0x{num7:X16}");
}
if (flag6 || flag || flag2 || flag3)
{
Console.Error.WriteLine($"[LOADER][TRACE] ImportCtx#{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} rcx=0x{cpuContext[CpuRegister.Rcx]:X16}");
if (flag6)
{
Console.Error.WriteLine(
$"[LOADER][TRACE] ImportArgs#{num}: " +
$"r8=0x{cpuContext[CpuRegister.R8]:X16} r9=0x{cpuContext[CpuRegister.R9]:X16} " +
$"stack0=0x{ReadImportStackArgument(argPackPtr, 0):X16} " +
$"stack1=0x{ReadImportStackArgument(argPackPtr, 1):X16} " +
$"stack2=0x{ReadImportStackArgument(argPackPtr, 2):X16} " +
$"stack3=0x{ReadImportStackArgument(argPackPtr, 3):X16} " +
$"stack4=0x{ReadImportStackArgument(argPackPtr, 4):X16} " +
$"stack5=0x{ReadImportStackArgument(argPackPtr, 5):X16}");
}
Console.Error.WriteLine($"[LOADER][TRACE] ImportNV#{num}: rbx=0x{value3:X16} rbp=0x{value4:X16} r12=0x{value5:X16} r13=0x{value6:X16} r14=0x{value7:X16} r15=0x{value8:X16}");
if (flag3)
{
ulong num9 = cpuContext[CpuRegister.Rsp];
if (cpuContext.TryReadUInt64(num9, out var value9) && cpuContext.TryReadUInt64(num9 + 8, out var value10) && cpuContext.TryReadUInt64(num9 + 16, out var value11) && cpuContext.TryReadUInt64(num9 + 24, out var value12) && cpuContext.TryReadUInt64(num9 + 32, out var value13) && cpuContext.TryReadUInt64(num9 + 40, out var value14) && cpuContext.TryReadUInt64(num9 + 48, out var value15) && cpuContext.TryReadUInt64(num9 + 56, out var value16) && cpuContext.TryReadUInt64(num9 + 64, out var value17))
{
Console.Error.WriteLine($"[LOADER][TRACE] ImportStackHead#{num}: rsp=0x{num9:X16} [0]=0x{value9:X16} [20]=0x{value13:X16} [40]=0x{value17:X16}");
Console.Error.WriteLine($"[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 && _logImportFrames)
{
TraceImportFrameChain(cpuContext, num);
}
if (flag6 && _logImportRecent)
{
DumpRecentImportTrace();
}
if (flag3)
{
Console.Error.Flush();
}
}
if (importStubEntry.Nid == "Ou3iL1abvng")
{
if (_logStackCheck)
{
var rbxGuardKnown = TryReadUInt64Compat(value3, out var rbxGuardValue);
var r12GuardKnown = TryReadUInt64Compat(value5, out var r12GuardValue);
Console.Error.WriteLine(
$"[LOADER][TRACE] stack_chk_diag#{num}: ret=0x{num7:X16} " +
$"rbx=0x{value3:X16}:{(rbxGuardKnown ? $"0x{rbxGuardValue:X16}" : "?")} " +
$"r12=0x{value5:X16}:{(r12GuardKnown ? $"0x{r12GuardValue:X16}" : "?")} " +
$"rbp=0x{value4:X16} rsp=0x{((ulong)argPackPtr + 96uL):X16}");
// Stack-protector layouts vary by compiler and function. Emit the
// bounded caller-frame tail instead of assuming a fixed canary
// offset; this also exposes an adjacent ABI output buffer overwrite.
for (var frameOffset = 0x10; frameOffset <= 0x80; frameOffset += sizeof(ulong))
{
var slotAddress = value4 >= (ulong)frameOffset ? value4 - (ulong)frameOffset : 0;
if (slotAddress != 0 && TryReadUInt64Compat(slotAddress, out var slotValue))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] stack_chk_frame#{num}: [rbp-0x{frameOffset:X}]=0x{slotValue:X16}");
}
}
}
try
{
byte[] array = new byte[64];
Marshal.Copy((nint)(num7 - 32), array, 0, array.Length);
Console.Error.WriteLine($"[LOADER][TRACE] __stack_chk_fail return-site @0x{num7:X16}: {BitConverter.ToString(array).Replace("-", " ")}");
}
catch
{
}
}
try
{
OrbisGen2Result orbisGen2Result;
bool dispatchResolved = true;
var previousImportCallFrame = GuestThreadExecution.EnterImportCallFrame(
num7,
(ulong)argPackPtr + 104uL,
ActiveGuestReturnSlotAddress);
try
{
if (string.Equals(importStubEntry.Nid, RuntimeStubNids.BootstrapBridge, StringComparison.Ordinal))
{
orbisGen2Result = DispatchBootstrapBridge();
}
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 = false;
orbisGen2Result = OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
cpuContext[CpuRegister.Rax] = unchecked((ulong)(int)orbisGen2Result);
}
}
finally
{
GuestThreadExecution.RestoreImportCallFrame(previousImportCallFrame);
}
DeliverPendingGuestExceptionAtSafePoint(
cpuContext,
CaptureImportBoundaryContinuation(cpuContext, argPackPtr, num7));
StoreImportVectorReturn(cpuContext, argPackPtr);
if (dispatchResolved &&
orbisGen2Result == OrbisGen2Result.ORBIS_GEN2_OK &&
string.Equals(importStubEntry.Nid, "BohYr-F7-is", StringComparison.Ordinal))
{
RegisterPrtLazyCommitRange(value2, num3);
}
if (!dispatchResolved)
{
LastError = "Missing HLE export for NID: " + importStubEntry.Nid;
if (string.Equals(importStubEntry.Nid, "cfwBSQyr5Ys", StringComparison.Ordinal) &&
string.Equals(
Environment.GetEnvironmentVariable("SHARPEMU_LOG_IL2CPP_EXCEPTION"),
"1",
StringComparison.Ordinal) &&
Interlocked.Increment(ref _il2CppExceptionDiagnosticCount) <= 4)
{
DumpIl2CppExceptionDiagnostic(cpuContext, value, num7);
}
Console.Error.WriteLine(
$"[LOADER][WARN] Import#{num} unresolved: nid={importStubEntry.Nid} ret=0x{num7:X16} " +
$"rdi=0x{value:X16} rsi=0x{value2:X16} rdx=0x{num3:X16} rcx=0x{num4:X16} r8=0x{num5:X16} r9=0x{num6:X16}");
if (importStubEntry.Nid == "L-Q3LEjIbgA")
{
string value18 = string.Join(" ", importStubEntry.Nid.Select(delegate (char c)
{
int num10 = c;
return num10.ToString("X2");
}));
Console.Error.WriteLine($"[LOADER][WARN] map_direct nid raw len={importStubEntry.Nid.Length} chars=[{value18}]");
Delegate function;
bool value19 = _moduleManager.TryGetFunction(importStubEntry.Nid, out function);
ExportedFunction export2;
bool value20 = _moduleManager.TryGetExport(importStubEntry.Nid, out export2);
Console.Error.WriteLine($"[LOADER][WARN] map_direct lookup with import nid: function={value19}, export={value20}");
Console.Error.WriteLine(_moduleManager.TryGetExport("L-Q3LEjIbgA", out ExportedFunction export3) ? $"[LOADER][WARN] Canonical map_direct exists as {export3.LibraryName}:{export3.Name}, target={export3.Target}, ctx_target={cpuContext.TargetGeneration}" : "[LOADER][WARN] Canonical map_direct export lookup also missing");
}
}
else if (orbisGen2Result != OrbisGen2Result.ORBIS_GEN2_OK)
{
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;
cpuContext[CpuRegister.R12] = value5;
cpuContext[CpuRegister.R13] = value6;
cpuContext[CpuRegister.R14] = value7;
cpuContext[CpuRegister.R15] = value8;
cpuContext[CpuRegister.Rdi] = value;
cpuContext[CpuRegister.Rsi] = value2;
if (GuestThreadExecution.TryConsumeCurrentContextTransfer(out var transferTarget))
{
if (!TryPrepareGuestContextTransfer(
transferTarget,
out var transferFrame,
out var transferStub,
out var transferError))
{
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 (_logFiber)
{
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}");
}
if (_activeGuestThreadState is { } transferGuestThreadState)
{
Volatile.Write(ref transferGuestThreadState.LastImportRax, transferTarget.Rax);
Volatile.Write(ref transferGuestThreadState.LastImportResultValid, 1);
}
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
{
LastError = $"Failed to complete guest entry after {importStubEntry.Nid}: missing host return sentinel";
cpuContext[CpuRegister.Rax] = 18446744071562199298uL;
}
}
if (GuestThreadExecution.TryConsumeCurrentThreadBlock(
out var blockReason,
out var blockContinuation,
out var hasBlockContinuation,
out var blockWakeKey,
out var blockWaiter,
out var blockDeadlineTimestamp) &&
TryYieldGuestThreadToHostStub(argPackPtr, num, num7, importStubEntry.Nid, blockReason))
{
if (hasBlockContinuation)
{
RegisterBlockedGuestThreadContinuation(
GuestThreadExecution.CurrentGuestThreadHandle,
blockContinuation,
blockWakeKey,
blockWaiter,
blockDeadlineTimestamp);
}
cpuContext[CpuRegister.Rax] = 0uL;
}
if (flag || flag2 || flag3)
{
Console.Error.WriteLine($"[LOADER][TRACE] ImportRet#{num}: nid={importStubEntry.Nid} result={orbisGen2Result} rax=0x{cpuContext[CpuRegister.Rax]:X16}");
if (flag3)
{
Console.Error.Flush();
}
}
var guestReturnValue = cpuContext[CpuRegister.Rax];
if (probeTarget)
{
ulong finalReturnSlot;
try
{
finalReturnSlot = *(ulong*)(argPackPtr + 96);
}
catch
{
finalReturnSlot = 0;
}
Console.Error.WriteLine(
$"[LOADER][TRACE] import-return-address-probe-exit " +
$"thread=0x{GuestThreadExecution.CurrentGuestThreadHandle:X16} " +
$"nid={importStubEntry.Nid} original=0x{num7:X16} " +
$"final=0x{finalReturnSlot:X16} rsp=0x{(ulong)argPackPtr + 96:X16} " +
$"yield={ActiveGuestThreadYieldRequested}");
}
if (_activeGuestThreadState is { } completedGuestThreadState)
{
Volatile.Write(ref completedGuestThreadState.LastImportRax, guestReturnValue);
Volatile.Write(ref completedGuestThreadState.LastImportResultValid, 1);
}
return guestReturnValue;
}
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;
if (_activeGuestThreadState is { } failedGuestThreadState)
{
Volatile.Write(ref failedGuestThreadState.LastImportRax, cpuContext[CpuRegister.Rax]);
Volatile.Write(ref failedGuestThreadState.LastImportResultValid, 1);
}
return cpuContext[CpuRegister.Rax];
}
}
private static void DumpIl2CppExceptionDiagnostic(
CpuContext cpuContext,
ulong wrapperAddress,
ulong returnAddress)
{
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.wrapper=0x{wrapperAddress:X16} " +
$"ret=0x{returnAddress:X16}");
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.registers " +
$"rbx=0x{cpuContext[CpuRegister.Rbx]:X16} " +
$"r12=0x{cpuContext[CpuRegister.R12]:X16} " +
$"r13=0x{cpuContext[CpuRegister.R13]:X16} " +
$"r14=0x{cpuContext[CpuRegister.R14]:X16} " +
$"r15=0x{cpuContext[CpuRegister.R15]:X16}");
if (GuestThreadExecution.TryGetCurrentImportCallFrame(out var frame))
{
DumpGuestCodePointers(cpuContext, "stack", frame.ResumeRsp, 0x1000);
}
DumpGuestFramePointerChain(cpuContext, cpuContext[CpuRegister.Rbp]);
if (string.Equals(
Environment.GetEnvironmentVariable("SHARPEMU_LOG_PS5_USER_SLOTS"),
"1",
StringComparison.Ordinal))
{
for (var slot = 0; slot < 4; slot++)
{
DumpGuestQwords(
cpuContext,
$"ps5_user_slot[{slot}]",
0x0000000801A73110 + (ulong)(slot * 0x51C8),
0x60);
}
}
if (!TryReadGuestU64(cpuContext, wrapperAddress, out var exceptionAddress))
{
Console.Error.WriteLine("[LOADER][TRACE] il2cpp_exception.wrapper unreadable");
return;
}
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.object=0x{exceptionAddress:X16}");
DumpGuestQwords(cpuContext, "exception", exceptionAddress, 0x90);
// Il2CppException begins with Il2CppObject (klass, monitor), followed by
// trace_ips, inner_ex and message. Decode both the documented message
// slot and nearby object pointers because Unity revisions have appended
// fields without changing the wrapper itself.
for (var offset = 0; offset <= 0x80; offset += 8)
{
if (!TryReadGuestU64(cpuContext, exceptionAddress + (ulong)offset, out var candidate) ||
candidate < 0x10000)
{
continue;
}
if (TryReadIl2CppString(cpuContext, candidate, out var text))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.string+0x{offset:X2}=" +
$"'{text}'");
}
}
if (TryReadGuestU64(cpuContext, exceptionAddress + 0x38, out var traceIpsAddress))
{
DumpIl2CppPointerArray(cpuContext, "trace_ips", traceIpsAddress);
}
if (TryReadGuestU64(cpuContext, exceptionAddress, out var klassAddress))
{
DumpGuestQwords(cpuContext, "exception_class", klassAddress, 0x100);
for (var offset = 0; offset <= 0xF8; offset += 8)
{
if (!TryReadGuestU64(cpuContext, klassAddress + (ulong)offset, out var candidate) ||
candidate < 0x10000)
{
continue;
}
if (TryReadGuestCString(cpuContext, candidate, out var text))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.class_string+0x{offset:X2}=" +
$"'{text}'");
}
}
}
}
private static void DumpGuestCodePointers(
CpuContext cpuContext,
string label,
ulong address,
int byteCount)
{
var buffer = new byte[byteCount];
if (!cpuContext.Memory.TryRead(address, buffer))
{
return;
}
var logged = 0;
for (var offset = 0; offset <= buffer.Length - 8 && logged < 128; offset += 8)
{
var candidate = BinaryPrimitives.ReadUInt64LittleEndian(buffer.AsSpan(offset, 8));
if (candidate < 0x0000000800000000 || candidate >= 0x0000001000000000)
{
continue;
}
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}+0x{offset:X3}=0x{candidate:X16}");
logged++;
}
}
private static void DumpGuestFramePointerChain(CpuContext cpuContext, ulong framePointer)
{
for (var depth = 0; depth < 64 && framePointer >= 0x10000; depth++)
{
if (!TryReadGuestU64(cpuContext, framePointer, out var nextFrame) ||
!TryReadGuestU64(cpuContext, framePointer + 8, out var returnRip))
{
break;
}
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.frame[{depth}] " +
$"rbp=0x{framePointer:X16} ret=0x{returnRip:X16}");
if (framePointer >= 0x40)
{
DumpGuestQwords(
cpuContext,
$"frame[{depth}]_locals",
framePointer - 0x40,
0x60);
if (depth <= 10 &&
TryReadGuestU64(cpuContext, framePointer - 0x20, out var savedRbx) &&
savedRbx >= 0x0000000100000000 &&
savedRbx < 0x0000000800000000)
{
DumpGuestQwords(
cpuContext,
$"frame[{depth}]_saved_rbx_object",
savedRbx,
0x50);
if (depth is >= 4 and <= 12)
{
DumpIl2CppObjectGraph(
cpuContext,
$"frame[{depth}]_saved_rbx",
savedRbx);
}
}
DumpIl2CppStringsInRange(
cpuContext,
$"frame[{depth}]",
framePointer >= 0x100 ? framePointer - 0x100 : 0,
0x140);
DumpIl2CppObjectsInRange(
cpuContext,
$"frame[{depth}]",
framePointer >= 0x100 ? framePointer - 0x100 : 0,
0x140);
}
if (nextFrame <= framePointer || nextFrame - framePointer > 0x100000)
{
break;
}
framePointer = nextFrame;
}
}
private static void DumpIl2CppObjectsInRange(
CpuContext cpuContext,
string label,
ulong address,
int byteCount)
{
var buffer = new byte[byteCount];
if (address == 0 || !cpuContext.Memory.TryRead(address, buffer))
{
return;
}
for (var offset = 0; offset <= buffer.Length - 8; offset += 8)
{
var candidate = BinaryPrimitives.ReadUInt64LittleEndian(buffer.AsSpan(offset, 8));
if (candidate < 0x0000000100000000 ||
candidate >= 0x0000000800000000 ||
!TryReadGuestU64(cpuContext, candidate, out var klass) ||
klass < 0x0000000100000000 ||
klass >= 0x0000000800000000 ||
!TryReadGuestU64(cpuContext, klass + 0x10, out var nameAddress) ||
!TryReadGuestCString(cpuContext, nameAddress, out var name))
{
continue;
}
var nameSpace = string.Empty;
if (TryReadGuestU64(cpuContext, klass + 0x18, out var namespaceAddress))
{
_ = TryReadGuestCString(cpuContext, namespaceAddress, out nameSpace);
}
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}_object@{offset:X3}=" +
$"0x{candidate:X16} {nameSpace}.{name}");
if (string.Equals(name, "ControllerMap_Editor", StringComparison.Ordinal))
{
DumpGuestQwords(cpuContext, $"{label}_controller_map", candidate, 0x40);
for (var fieldOffset = 0x20; fieldOffset <= 0x28; fieldOffset += 8)
{
if (TryReadGuestU64(cpuContext, candidate + (ulong)fieldOffset, out var stringAddress) &&
TryReadIl2CppString(cpuContext, stringAddress, out var fieldText))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}_controller_map+0x{fieldOffset:X2}=" +
$"'{fieldText}'");
}
}
}
}
}
private static void DumpIl2CppStringsInRange(
CpuContext cpuContext,
string label,
ulong address,
int byteCount)
{
var buffer = new byte[byteCount];
if (address == 0 || !cpuContext.Memory.TryRead(address, buffer))
{
return;
}
for (var offset = 0; offset <= buffer.Length - 8; offset += 8)
{
var candidate = BinaryPrimitives.ReadUInt64LittleEndian(buffer.AsSpan(offset, 8));
if (candidate < 0x0000000100000000 ||
candidate >= 0x0000000800000000 ||
!TryReadIl2CppString(cpuContext, candidate, out var text) ||
text.Length == 0)
{
continue;
}
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}_string@{offset:X3}=" +
$"0x{candidate:X16} '{text}'");
}
}
private static void DumpIl2CppObjectGraph(
CpuContext cpuContext,
string label,
ulong objectAddress)
{
if (!TryReadGuestU64(cpuContext, objectAddress, out var klassAddress))
{
return;
}
DumpGuestQwords(cpuContext, $"{label}_class", klassAddress, 0x400);
for (var offset = 0; offset <= 0xF8; offset += 8)
{
if (TryReadGuestU64(cpuContext, klassAddress + (ulong)offset, out var candidate) &&
candidate >= 0x10000 &&
TryReadGuestCString(cpuContext, candidate, out var text))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}_class_string+0x{offset:X2}='{text}'");
}
}
for (var offset = 0x10; offset <= 0x48; offset += 8)
{
if (!TryReadGuestU64(cpuContext, objectAddress + (ulong)offset, out var candidate) ||
candidate < 0x0000000100000000 ||
candidate >= 0x0000000800000000)
{
continue;
}
DumpGuestQwords(
cpuContext,
$"{label}_field+0x{offset:X2}",
candidate,
0x80);
if (TryReadGuestU64(cpuContext, candidate, out var candidateClass))
{
DumpGuestQwords(
cpuContext,
$"{label}_field+0x{offset:X2}_class",
candidateClass,
0x400);
for (var classOffset = 0; classOffset <= 0xF8; classOffset += 8)
{
if (TryReadGuestU64(
cpuContext,
candidateClass + (ulong)classOffset,
out var classCandidate) &&
classCandidate >= 0x10000 &&
TryReadGuestCString(cpuContext, classCandidate, out var text))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}_field+0x{offset:X2}" +
$"_class_string+0x{classOffset:X2}='{text}'");
}
}
}
}
}
private static void DumpIl2CppPointerArray(
CpuContext cpuContext,
string label,
ulong address)
{
if (address < 0x10000 ||
!TryReadGuestU64(cpuContext, address + 0x18, out var rawLength))
{
return;
}
var length = (int)Math.Min(rawLength, 128);
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}=0x{address:X16} " +
$"length={rawLength}");
for (var index = 0; index < length; index++)
{
if (!TryReadGuestU64(cpuContext, address + 0x20 + (ulong)(index * 8), out var value))
{
break;
}
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}[{index}]=0x{value:X16}");
}
}
private static void DumpGuestQwords(
CpuContext cpuContext,
string label,
ulong address,
int byteCount)
{
var buffer = new byte[byteCount];
if (!cpuContext.Memory.TryRead(address, buffer))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}=unreadable@0x{address:X16}");
return;
}
for (var offset = 0; offset < buffer.Length; offset += 32)
{
var values = new string[Math.Min(4, (buffer.Length - offset) / 8)];
for (var i = 0; i < values.Length; i++)
{
values[i] = $"{BinaryPrimitives.ReadUInt64LittleEndian(buffer.AsSpan(offset + i * 8, 8)):X16}";
}
Console.Error.WriteLine(
$"[LOADER][TRACE] il2cpp_exception.{label}+0x{offset:X2}: " +
string.Join(" ", values));
}
}
private static bool TryReadGuestU64(CpuContext cpuContext, ulong address, out ulong value)
{
Span<byte> buffer = stackalloc byte[8];
if (!cpuContext.Memory.TryRead(address, buffer))
{
value = 0;
return false;
}
value = BinaryPrimitives.ReadUInt64LittleEndian(buffer);
return true;
}
private static bool TryReadIl2CppString(
CpuContext cpuContext,
ulong address,
out string text)
{
text = string.Empty;
Span<byte> header = stackalloc byte[20];
if (!cpuContext.Memory.TryRead(address, header))
{
return false;
}
var length = BinaryPrimitives.ReadInt32LittleEndian(header[16..]);
if (length <= 0 || length > 2048)
{
return false;
}
var bytes = new byte[length * 2];
if (!cpuContext.Memory.TryRead(address + 20, bytes))
{
return false;
}
text = SanitizeDiagnosticText(Encoding.Unicode.GetString(bytes));
return text.Length != 0;
}
private static bool TryReadGuestCString(
CpuContext cpuContext,
ulong address,
out string text)
{
text = string.Empty;
var buffer = new byte[256];
if (!cpuContext.Memory.TryRead(address, buffer))
{
return false;
}
var length = Array.IndexOf(buffer, (byte)0);
if (length <= 0)
{
return false;
}
for (var i = 0; i < length; i++)
{
if (buffer[i] is < 0x20 or > 0x7E)
{
return false;
}
}
text = Encoding.UTF8.GetString(buffer, 0, length);
return true;
}
private static string SanitizeDiagnosticText(string text)
{
var builder = new StringBuilder(Math.Min(text.Length, 512));
foreach (var character in text)
{
if (builder.Length >= 512)
{
break;
}
builder.Append(char.IsControl(character) ? ' ' : character);
}
return builder.ToString().Trim();
}
private unsafe static void LoadImportVolatileArguments(CpuContext cpuContext, nint argPackPtr)
{
cpuContext[CpuRegister.Rax] = *(ulong*)(argPackPtr + ImportSavedRaxOffset);
cpuContext[CpuRegister.R10] = *(ulong*)(argPackPtr + ImportSavedR10Offset);
cpuContext[CpuRegister.R11] = *(ulong*)(argPackPtr + ImportSavedR11Offset);
cpuContext.Mxcsr = *(uint*)(argPackPtr + ImportSavedMxcsrOffset);
cpuContext.FpuControlWord = *(ushort*)(argPackPtr + ImportSavedFpuControlOffset);
for (var registerIndex = 0; registerIndex < ImportVectorRegisterCount; registerIndex++)
{
var registerAddress = argPackPtr + ImportSavedXmmOffset + (registerIndex * 16);
cpuContext.SetXmmRegister(
registerIndex,
*(ulong*)registerAddress,
*(ulong*)(registerAddress + 8));
}
}
private unsafe static void StoreImportVectorReturn(CpuContext cpuContext, nint argPackPtr)
{
// AMD64 returns scalar/vector floating-point values in XMM0 and may use
// XMM1 for the second eightbyte of a classified aggregate.
for (var registerIndex = 0; registerIndex < 2; registerIndex++)
{
cpuContext.GetXmmRegister(registerIndex, out var low, out var high);
var registerAddress = argPackPtr + ImportSavedXmmOffset + (registerIndex * 16);
*(ulong*)registerAddress = low;
*(ulong*)(registerAddress + 8) = high;
}
}
private static ulong ReadImportStackArgument(nint argPackPtr, int index)
{
var address = checked((ulong)argPackPtr + 104UL + (ulong)index * sizeof(ulong));
return TryReadHostQword(address, out var value) ? value : 0;
}
private static GuestCpuContinuation CaptureImportBoundaryContinuation(
CpuContext context,
nint argPackPtr,
ulong returnRip) =>
new(
Rip: returnRip,
Rsp: (ulong)argPackPtr + 104UL,
ReturnSlotAddress: (ulong)argPackPtr + 96UL,
Rflags: context.Rflags,
FsBase: context.FsBase,
GsBase: context.GsBase,
Rax: context[CpuRegister.Rax],
Rcx: context[CpuRegister.Rcx],
Rdx: context[CpuRegister.Rdx],
Rbx: context[CpuRegister.Rbx],
Rbp: context[CpuRegister.Rbp],
Rsi: context[CpuRegister.Rsi],
Rdi: context[CpuRegister.Rdi],
R8: context[CpuRegister.R8],
R9: context[CpuRegister.R9],
R10: context[CpuRegister.R10],
R11: context[CpuRegister.R11],
R12: context[CpuRegister.R12],
R13: context[CpuRegister.R13],
R14: context[CpuRegister.R14],
R15: context[CpuRegister.R15],
FpuControlWord: context.FpuControlWord,
Mxcsr: context.Mxcsr,
RestoreFullFpuState: false);
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);
var leafStackPointer = (ulong)argPackPtr + 96UL;
var probeLeafReturn = _logAllImports &&
string.Equals(importStubEntry.Nid, "2Z+PpY6CaJg", StringComparison.Ordinal) &&
leafStackPointer >= 0x00006FFFAC1FF000UL &&
leafStackPointer < 0x00006FFFAC200000UL;
if (probeLeafReturn)
{
Console.Error.WriteLine(
$"[LOADER][TRACE] leaf-return-probe-enter nid={importStubEntry.Nid} " +
$"ret=0x{returnRip:X16} rsp=0x{leafStackPointer:X16} " +
$"active_slot=0x{ActiveGuestReturnSlotAddress:X16}");
}
cpuContext.Rip = importStubEntry.Address;
LoadImportVolatileArguments(cpuContext, argPackPtr);
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);
activeGuestThreadState.LastImportRdi = arg0;
activeGuestThreadState.LastImportRsi = *(ulong*)(argPackPtr + 8);
activeGuestThreadState.LastImportRdx = *(ulong*)(argPackPtr + 16);
activeGuestThreadState.LastImportRcx = *(ulong*)(argPackPtr + 24);
activeGuestThreadState.LastImportR8 = *(ulong*)(argPackPtr + 32);
activeGuestThreadState.LastImportR9 = *(ulong*)(argPackPtr + 40);
activeGuestThreadState.LastImportStack0 = ReadImportStackArgument(argPackPtr, 0);
activeGuestThreadState.LastImportStack1 = ReadImportStackArgument(argPackPtr, 1);
activeGuestThreadState.LastImportStack2 = ReadImportStackArgument(argPackPtr, 2);
activeGuestThreadState.LastImportStack3 = ReadImportStackArgument(argPackPtr, 3);
activeGuestThreadState.LastImportStack4 = ReadImportStackArgument(argPackPtr, 4);
activeGuestThreadState.LastImportStack5 = ReadImportStackArgument(argPackPtr, 5);
Volatile.Write(ref activeGuestThreadState.LastImportResultValid, 0);
Volatile.Write(ref activeGuestThreadState.LastReturnRip, returnRip);
Volatile.Write(ref activeGuestThreadState.LastImportNid, importStubEntry.Nid);
}
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 (importStubEntry.IsNoBlockLeaf)
{
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);
}
}
DeliverPendingGuestExceptionAtSafePoint(
cpuContext,
CaptureImportBoundaryContinuation(cpuContext, argPackPtr, returnRip));
StoreImportVectorReturn(cpuContext, argPackPtr);
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}");
}
}
var consumedThreadBlock = GuestThreadExecution.TryConsumeCurrentThreadBlock(
out var blockReason,
out var blockContinuation,
out var hasBlockContinuation,
out var blockWakeKey,
out var blockWaiter,
out var blockDeadlineTimestamp);
if (consumedThreadBlock &&
TryYieldGuestThreadToHostStub(argPackPtr, dispatchIndex, returnRip, importStubEntry.Nid, blockReason))
{
if (hasBlockContinuation)
{
RegisterBlockedGuestThreadContinuation(
GuestThreadExecution.CurrentGuestThreadHandle,
blockContinuation,
blockWakeKey,
blockWaiter,
blockDeadlineTimestamp);
}
cpuContext[CpuRegister.Rax] = 0uL;
}
if (probeLeafReturn)
{
Console.Error.WriteLine(
$"[LOADER][TRACE] leaf-return-probe-exit nid={importStubEntry.Nid} " +
$"original=0x{returnRip:X16} final=0x{*(ulong*)(argPackPtr + 96):X16} " +
$"rsp=0x{leafStackPointer:X16} active_slot=0x{ActiveGuestReturnSlotAddress:X16} " +
$"block={consumedThreadBlock} yield={ActiveGuestThreadYieldRequested}");
}
result = cpuContext[CpuRegister.Rax];
if (_activeGuestThreadState is { } completedGuestThreadState)
{
Volatile.Write(ref completedGuestThreadState.LastImportRax, result);
Volatile.Write(ref completedGuestThreadState.LastImportResultValid, 1);
}
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
"gzndltBEzWc" or // sceAmprCommandBufferGetNumCommands
"H896Pt-yB4I" or // sceAmprCommandBufferWriteKernelEventQueue_04_00
"sJXyWHjP-F8" or // sceAmprCommandBufferWriteAddressOnCompletion
"mPpPxv5CZt4" or // sceSystemServiceGetHdrToneMapLuminance
"1FZBKy8HeNU" or // sceVideoOutGetVblankStatus
"ASoW5WE-UPo" or // sceKernelAprSubmitCommandBufferAndGetResult
"rqwFKI4PAiM" or // sceKernelAprWaitCommandBuffer
"eE4Szl8sil8" or // sceKernelAprSubmitCommandBuffer
"qvMUCyyaCSI" or // sceKernelAprSubmitCommandBufferAndGetId
"Q2V+iqvjgC0" or // vsnprintf
"AV6ipCNa4Rw" or // strcasecmp
"viiwFMaNamA" or // strstr
"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 expectedNetAcceptWouldBlock =
string.Equals(nid, "PIWqhn9oSxc", StringComparison.Ordinal) &&
resultValue == unchecked((int)0x80410123);
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 &&
!expectedNetAcceptWouldBlock &&
!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;
}
// These leaf operations cannot park the current guest thread. Unlocks may
// wake another cooperative thread, but the scheduler drain is independent
// of the caller's import-boundary bookkeeping.
return nid is
"tn3VlD0hG60" or // scePthreadMutexUnlock
"2Z+PpY6CaJg" or // pthread_mutex_unlock
"EgmLo6EWgso" or // scePthreadRwlockUnlock
"+L98PIbGttk" or // pthread_rwlock_unlock
"8aI7R7WaOlc" or // sceAmprCommandBufferConstructor
"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
"n485EBnIWmk" or // sceAgcWaitRegMemPatchCompareFunction
"7nOoijNPvEU" or // sceAgcWaitRegMemPatchReference
"hXAnLgDHCoI" or // sceAgcWaitRegMemPatchMask
"0fWWK5uG9rQ" or // sceAgcQueueEndOfPipeActionPatchAddress
"J8YCgfKAMQs" or // sceAgcQueueEndOfPipeActionPatchGcrCntl
"MlEw1feXcjg" or // sceAgcQueueEndOfPipeActionPatchData
"T9fjQIINoeE" or // sceAgcQueueEndOfPipeActionPatchType
"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
"gzndltBEzWc" or
"H896Pt-yB4I" or
"sJXyWHjP-F8" or
"mPpPxv5CZt4" or
"1FZBKy8HeNU" 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
"AV6ipCNa4Rw" or // strcasecmp
"viiwFMaNamA" or // strstr
"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
// rwlock rd/wr lock removed (can block); init/destroy/unlock stay.
"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];
for (int i = 0; i < 16; i++)
{
if (!context.TryReadUInt64(frame, out var next) ||
!context.TryReadUInt64(frame + sizeof(ulong), out var returnRip))
{
break;
}
var symbol = TryFormatNearestRuntimeSymbol(returnRip, out var formatted)
? $" [{formatted}]"
: string.Empty;
Console.Error.WriteLine(
$"[LOADER][TRACE] ImportFrame#{dispatchIndex}.{i}: rbp=0x{frame:X16} ret=0x{returnRip:X16}{symbol} next=0x{next:X16}");
if (next <= frame || next - frame > 0x100000)
{
break;
}
frame = next;
}
}
private unsafe bool TryForceGuestExitToHostStub(nint argPackPtr, long dispatchIndex, ulong returnRip, string nid)
{
ulong num = ActiveEntryReturnSentinelRip;
if (num < 65536 || !TryPatchActiveGuestReturnSlot(num))
{
return false;
}
try
{
*(ulong*)(argPackPtr + 96) = num;
}
catch
{
return false;
}
ActiveForcedGuestExit = true;
LastError = $"Detected repeating import loop at import#{dispatchIndex} ({nid}) and forced guest exit.";
Console.Error.WriteLine($"[LOADER][ERROR] Import-loop guard fired at import#{dispatchIndex}: nid={nid} ret=0x{returnRip:X16} -> host_exit=0x{num:X16}");
DumpRecentImportTrace();
return true;
}
private unsafe bool TryCompleteGuestEntryToHostStub(nint argPackPtr, long dispatchIndex, ulong returnRip, string nid, string reason, ulong value)
{
ulong hostExit = ActiveEntryReturnSentinelRip;
if (hostExit < 65536 || !TryPatchActiveGuestReturnSlot(hostExit))
{
return false;
}
try
{
*(ulong*)(argPackPtr + 96) = hostExit;
}
catch
{
return false;
}
Console.Error.WriteLine(
$"[LOADER][INFO] Guest entry exit at import#{dispatchIndex}: nid={nid} ret=0x{returnRip:X16} reason={reason} value=0x{value:X16}");
return true;
}
private unsafe bool TryYieldGuestThreadToHostStub(nint argPackPtr, long dispatchIndex, ulong returnRip, string nid, string reason)
{
ulong hostExit = ActiveEntryReturnSentinelRip;
if (hostExit < 65536 || !TryPatchActiveGuestReturnSlot(hostExit))
{
return false;
}
try
{
*(ulong*)(argPackPtr + 96) = hostExit;
}
catch
{
return false;
}
ActiveGuestThreadYieldRequested = true;
ActiveGuestThreadYieldReason = string.IsNullOrWhiteSpace(reason) ? nid : reason;
if (_logGuestThreads)
{
Console.Error.WriteLine(
$"[LOADER][INFO] Guest thread yield at import#{dispatchIndex}: nid={nid} ret=0x{returnRip:X16} reason={ActiveGuestThreadYieldReason}");
}
return true;
}
private bool TryPatchActiveGuestReturnSlot(ulong hostExit)
{
ulong returnSlotAddress = ActiveGuestReturnSlotAddress;
return returnSlotAddress != 0 &&
ActiveCpuContext is not null &&
ActiveCpuContext.TryWriteUInt64(returnSlotAddress, hostExit);
}
private bool ShouldForceGuestExitOnImportLoop(in ImportStubEntry entry, ulong returnRip, long dispatchIndex, ulong arg0, ulong arg1)
{
if (dispatchIndex < 1200)
{
return false;
}
if (_disableImportLoopGuard || _importLoopGuardSeconds <= 0)
{
return false;
}
if (entry.IsLoopGuardBoundary)
{
ResetImportLoopPattern();
return false;
}
var value = entry.NidHash;
RecordImportLoopSignature(value, returnRip, BuildImportLoopSignature(value, returnRip, arg0, arg1));
// The O(period x repeats) pattern scan is a boot/hang watchdog, not a
// steady-state feature; sampling every 256th dispatch keeps its cost
// off the hot path while still tripping within a couple of thousand
// dispatches of a genuine import loop.
if ((dispatchIndex & 0xFF) != 0)
{
return false;
}
if (!HasRepeatingImportLoopPattern())
{
if (_importLoopPatternHits > 0)
{
_importLoopPatternHits--;
}
if (_importLoopPatternHits == 0)
{
_importLoopPatternStartTimestamp = 0;
}
return false;
}
if (_importLoopPatternStartTimestamp == 0)
{
_importLoopPatternStartTimestamp = Stopwatch.GetTimestamp();
}
_importLoopPatternHits++;
if (_importLoopPatternHits < 6)
{
return false;
}
var elapsedTicks = Stopwatch.GetTimestamp() - _importLoopPatternStartTimestamp;
return elapsedTicks >= (long)(_importLoopGuardSeconds * Stopwatch.Frequency);
}
private static bool IsImportLoopGuardBoundary(string nid) =>
nid is
"1jfXLRVzisc" or // sceKernelUsleep
"WKAXJ4XBPQ4" or // scePthreadCondWait
"BmMjYxmew1w" or // scePthreadCondTimedwait
"Op8TBGY5KHg" or // pthread_cond_wait
"27bAgiJmOh0"; // pthread_cond_timedwait
private void ResetImportLoopPattern()
{
_importLoopPatternHits = 0;
_importLoopPatternStartTimestamp = 0;
_importLoopSignatureCount = 0;
_importLoopSignatureWriteIndex = 0;
}
private static int GetImportLoopGuardSeconds()
{
if (int.TryParse(Environment.GetEnvironmentVariable("SHARPEMU_IMPORT_LOOP_GUARD_SECONDS"), out var seconds))
{
return Math.Max(0, seconds);
}
return DefaultImportLoopGuardSeconds;
}
private ulong BuildImportLoopSignature(ulong nidHash, ulong returnRip, ulong arg0, ulong arg1)
{
ulong num = returnRip >> 2;
ulong num2 = ((arg0 >> 4) * 11400714819323198485uL) ^ ((arg1 >> 4) * 14029467366897019727uL);
return num ^ nidHash * 11400714819323198485uL ^ num2;
}
private void RecordImportLoopSignature(ulong nidHash, ulong returnRip, ulong signature)
{
_importLoopSignatures[_importLoopSignatureWriteIndex] = signature;
_importLoopNidHashes[_importLoopSignatureWriteIndex] = nidHash;
_importLoopReturnRips[_importLoopSignatureWriteIndex] = returnRip;
_importLoopSignatureWriteIndex = (_importLoopSignatureWriteIndex + 1) % _importLoopSignatures.Length;
if (_importLoopSignatureCount < _importLoopSignatures.Length)
{
_importLoopSignatureCount++;
}
}
private bool HasRepeatingImportLoopPattern()
{
int num = _importLoopSignatureCount;
if (num < 96)
{
return false;
}
int num2 = Math.Min(48, num / 4);
for (int i = 6; i <= num2; i++)
{
if (HasRepeatingImportLoopPattern(i, 4))
{
return true;
}
}
return false;
}
private bool HasRepeatingImportLoopPattern(int period, int repeats)
{
int num = period * repeats;
if (period <= 0 || repeats < 2 || _importLoopSignatureCount < num)
{
return false;
}
for (int i = 0; i < period; i++)
{
ulong importLoopSignatureFromTail = GetImportLoopSignatureFromTail(i);
for (int j = 1; j < repeats; j++)
{
if (GetImportLoopSignatureFromTail(i + j * period) != importLoopSignatureFromTail)
{
return false;
}
}
}
return IsSevereImportLoopPattern(num);
}
private ulong GetImportLoopSignatureFromTail(int offset)
{
int num = _importLoopSignatureWriteIndex - 1 - offset;
while (num < 0)
{
num += _importLoopSignatures.Length;
}
return _importLoopSignatures[num % _importLoopSignatures.Length];
}
private bool IsSevereImportLoopPattern(int sampleCount)
{
int num = CountDistinctImportLoopValuesFromTail(_importLoopNidHashes, sampleCount, 3);
if (num > 2)
{
return false;
}
int num2 = CountDistinctImportLoopValuesFromTail(_importLoopReturnRips, sampleCount, 3);
if (num2 > 2)
{
return false;
}
int num3 = Math.Min(_importLoopSignatureCount, Math.Max(sampleCount * 8, ImportLoopWideDiversityWindow));
if (num3 <= sampleCount)
{
return true;
}
if (CountDistinctImportLoopValuesFromTail(_importLoopNidHashes, num3, 3) > 2)
{
return false;
}
return CountDistinctImportLoopValuesFromTail(_importLoopReturnRips, num3, 3) <= 2;
}
private int CountDistinctImportLoopValuesFromTail(ulong[] source, int sampleCount, int stopAfter)
{
int num = Math.Min(sampleCount, _importLoopSignatureCount);
int num2 = 0;
for (int i = 0; i < num; i++)
{
ulong importLoopValueFromTail = GetImportLoopValueFromTail(source, i);
bool flag = false;
for (int j = 0; j < i; j++)
{
if (GetImportLoopValueFromTail(source, j) == importLoopValueFromTail)
{
flag = true;
break;
}
}
if (!flag && ++num2 >= stopAfter)
{
return num2;
}
}
return num2;
}
private ulong GetImportLoopValueFromTail(ulong[] source, int offset)
{
int num = _importLoopSignatureWriteIndex - 1 - offset;
while (num < 0)
{
num += source.Length;
}
return source[num % source.Length];
}
private bool ShouldSuppressStrlenTrace(string nid)
{
return string.Equals(nid, "j4ViWNHEgww", StringComparison.Ordinal) && !_logStrlenImports;
}
private void TrackDistinctImportNid(string nid)
{
if (string.IsNullOrWhiteSpace(nid) || string.Equals(_lastDistinctImportNid, nid, StringComparison.Ordinal))
{
return;
}
_lastDistinctImportNid = nid;
_distinctImportNidHistory[_distinctImportNidHistoryWriteIndex] = nid;
_distinctImportNidHistoryWriteIndex = (_distinctImportNidHistoryWriteIndex + 1) % _distinctImportNidHistory.Length;
if (_distinctImportNidHistoryCount < _distinctImportNidHistory.Length)
{
_distinctImportNidHistoryCount++;
}
}
private void TrackStrlenPrelude(string nid, long dispatchIndex, ulong returnRip)
{
if (!string.Equals(nid, "j4ViWNHEgww", StringComparison.Ordinal))
{
_consecutiveStrlenImports = 0;
_strlenPreludeLogged = false;
return;
}
_consecutiveStrlenImports++;
if (_strlenPreludeLogged || _consecutiveStrlenImports < 24)
{
return;
}
_strlenPreludeLogged = true;
List<string> list = GetRecentDistinctImportPrelude(maxCount: 5, skipNid: "j4ViWNHEgww");
if (list.Count == 0)
{
Console.Error.WriteLine($"[LOADER][WARNING] Import#{dispatchIndex}: detected strlen burst (count={_consecutiveStrlenImports}) ret=0x{returnRip:X16}; no prelude NIDs recorded.");
return;
}
Console.Error.WriteLine($"[LOADER][WARNING] Import#{dispatchIndex}: detected strlen burst (count={_consecutiveStrlenImports}) ret=0x{returnRip:X16}; last5_nids={string.Join(" -> ", list)}");
}
private List<string> GetRecentDistinctImportPrelude(int maxCount, string skipNid)
{
List<string> list = new List<string>(maxCount);
if (maxCount <= 0 || _distinctImportNidHistoryCount == 0)
{
return list;
}
HashSet<string> hashSet = new HashSet<string>(StringComparer.Ordinal);
for (int i = 0; i < _distinctImportNidHistoryCount && list.Count < maxCount; i++)
{
int num = _distinctImportNidHistoryWriteIndex - 1 - i;
while (num < 0)
{
num += _distinctImportNidHistory.Length;
}
string text = _distinctImportNidHistory[num % _distinctImportNidHistory.Length];
if (string.IsNullOrWhiteSpace(text) || string.Equals(text, skipNid, StringComparison.Ordinal) || !hashSet.Add(text))
{
continue;
}
if (_moduleManager.TryGetExport(text, out ExportedFunction export))
{
list.Add($"{export.LibraryName}:{export.Name}({text})");
}
else
{
list.Add(text);
}
}
list.Reverse();
return list;
}
private static ulong StableHash64(string text)
{
ulong num = 14695981039346656037uL;
for (int i = 0; i < text.Length; i++)
{
num ^= text[i];
num *= 1099511628211uL;
}
return num;
}
private OrbisGen2Result DispatchKernelDynlibDlsym()
{
var cpuContext = ActiveCpuContext;
if (cpuContext == null)
{
return OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
}
ulong symbolNameAddress = cpuContext[CpuRegister.Rsi];
ulong outputAddress = cpuContext[CpuRegister.Rdx];
if (!TryReadAsciiZ(symbolNameAddress, 512, out var symbolName))
{
cpuContext[CpuRegister.Rax] = 18446744073709551615uL;
return OrbisGen2Result.ORBIS_GEN2_OK;
}
var moduleHandle = unchecked((int)cpuContext[CpuRegister.Rdi]);
if (!TryResolveModuleSymbolAddress(moduleHandle, symbolName, out var resolvedAddress) &&
!TryResolveRuntimeSymbolAddress(symbolName, out resolvedAddress) &&
!TryResolveRuntimeSymbolAddress(ComputePsNid(symbolName), out 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;
}
if (string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_DLSYM"), "1", StringComparison.Ordinal))
{
Console.Error.WriteLine(
$"[LOADER][TRACE] sceKernelDlsym: handle=0x{moduleHandle:X} symbol='{symbolName}' -> 0x{resolvedAddress:X16}");
}
if (outputAddress == 0L || !TryWriteUInt64Compat(outputAddress, resolvedAddress))
{
cpuContext[CpuRegister.Rax] = 18446744073709551615uL;
return OrbisGen2Result.ORBIS_GEN2_OK;
}
cpuContext[CpuRegister.Rax] = 0uL;
return OrbisGen2Result.ORBIS_GEN2_OK;
}
private static bool TryResolveModuleSymbolAddress(int moduleHandle, string symbolName, out ulong address)
{
if (KernelModuleRegistry.TryResolveModuleSymbol(moduleHandle, symbolName, out address))
{
return true;
}
var nid = ComputePsNid(symbolName);
return KernelModuleRegistry.TryResolveModuleSymbol(moduleHandle, nid, out address);
}
private static string ComputePsNid(string symbolName)
{
ReadOnlySpan<byte> salt =
[
0x51, 0x8D, 0x64, 0xA6, 0x35, 0xDE, 0xD8, 0xC1,
0xE6, 0xB0, 0x39, 0xB1, 0xC3, 0xE5, 0x52, 0x30,
];
var nameBytes = Encoding.UTF8.GetBytes(symbolName);
var input = new byte[nameBytes.Length + salt.Length];
nameBytes.CopyTo(input, 0);
salt.CopyTo(input.AsSpan(nameBytes.Length));
Span<byte> digest = stackalloc byte[20];
SHA1.HashData(input, digest);
var value = BinaryPrimitives.ReadUInt64LittleEndian(digest);
Span<byte> bigEndianValue = stackalloc byte[sizeof(ulong)];
BinaryPrimitives.WriteUInt64BigEndian(bigEndianValue, value);
return Convert.ToBase64String(bigEndianValue).TrimEnd('=').Replace('/', '-');
}
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;
if (cpuContext == null)
{
return OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
}
ulong bridgeHandle = cpuContext[CpuRegister.Rdi];
ulong symbolNameAddress = cpuContext[CpuRegister.Rsi];
ulong outputAddress = cpuContext[CpuRegister.Rdx];
_ = TryReadAsciiZ(symbolNameAddress, 512, out var symbolName);
OrbisGen2Result result = DispatchKernelDynlibDlsym();
if (result != OrbisGen2Result.ORBIS_GEN2_OK)
{
return result;
}
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}");
}
if (cpuContext[CpuRegister.Rax] == 0uL)
{
return OrbisGen2Result.ORBIS_GEN2_OK;
}
Console.Error.WriteLine(
$"[LOADER][WARN] bootstrap_bridge unresolved: handle=0x{bridgeHandle:X} symbol='{symbolName}' out=0x{outputAddress:X16}");
return OrbisGen2Result.ORBIS_GEN2_OK;
}
private bool TryResolveRuntimeSymbolAddress(string symbolName, out ulong address)
{
address = 0uL;
if (string.IsNullOrWhiteSpace(symbolName))
{
return false;
}
if (_runtimeSymbolsByName.TryGetValue(symbolName, out var value) && IsRuntimeSymbolAddressUsable(value))
{
address = value;
return true;
}
if (symbolName.StartsWith("_", StringComparison.Ordinal) && _runtimeSymbolsByName.TryGetValue(symbolName[1..], out value) && IsRuntimeSymbolAddressUsable(value))
{
address = value;
return true;
}
if (_runtimeSymbolsByName.TryGetValue("_" + symbolName, out value) && IsRuntimeSymbolAddressUsable(value))
{
address = value;
return true;
}
return false;
}
private static bool IsRuntimeSymbolAddressUsable(ulong value)
{
return value != 0 && !IsUnresolvedSentinel(value);
}
private bool TryReadAsciiZ(ulong address, int maxLength, out string value)
{
value = string.Empty;
if (ActiveCpuContext == null || address == 0L || maxLength <= 0)
{
return false;
}
const int StackBufferLength = 512;
byte[]? rented = maxLength > StackBufferLength
? System.Buffers.ArrayPool<byte>.Shared.Rent(maxLength)
: null;
Span<byte> buffer = rented is null ? stackalloc byte[StackBufferLength] : rented;
try
{
for (var i = 0; i < maxLength; i++)
{
if (!TryReadByteCompat(address + (ulong)i, buffer.Slice(i, 1)))
{
return false;
}
if (buffer[i] == 0)
{
value = System.Text.Encoding.ASCII.GetString(buffer[..i]);
return true;
}
}
value = System.Text.Encoding.ASCII.GetString(buffer[..maxLength]);
return true;
}
finally
{
if (rented is not null)
{
System.Buffers.ArrayPool<byte>.Shared.Return(rented);
}
}
}
private bool TryReadByteCompat(ulong address, Span<byte> destination)
{
var cpuContext = ActiveCpuContext;
if (cpuContext == null || destination.Length == 0)
{
return false;
}
if (cpuContext.Memory.TryRead(address, destination))
{
return true;
}
try
{
destination[0] = Marshal.ReadByte((nint)address);
return true;
}
catch
{
return false;
}
}
private bool TryReadUInt64Compat(ulong address, out ulong value)
{
value = 0;
var cpuContext = ActiveCpuContext;
if (cpuContext == null || address == 0L)
{
return false;
}
if (cpuContext.TryReadUInt64(address, out value))
{
return true;
}
try
{
value = unchecked((ulong)Marshal.ReadInt64((nint)address));
return true;
}
catch
{
value = 0;
return false;
}
}
private bool TryWriteUInt64Compat(ulong address, ulong value)
{
var cpuContext = ActiveCpuContext;
if (cpuContext == null || address == 0L)
{
return false;
}
if (cpuContext.TryWriteUInt64(address, value))
{
return true;
}
try
{
Marshal.WriteInt64((nint)address, unchecked((long)value));
return true;
}
catch
{
return false;
}
}
private unsafe void TryPatchEa020eLookupCall(long dispatchIndex, ulong returnRip)
{
if (_patchedEa020eLookupCall || returnRip != 0x0000000800EA01A6uL)
{
return;
}
const ulong num = 0x0000000800EA020EuL;
nint num2 = unchecked((nint)num);
uint flNewProtect = default(uint);
try
{
if (Marshal.ReadByte(num2) != 232 || !VirtualProtect((void*)num, 5u, 64u, &flNewProtect))
{
return;
}
for (int i = 0; i < 5; i++)
{
Marshal.WriteByte(num2 + i, 144);
}
FlushInstructionCache(GetCurrentProcess(), (void*)num, 5u);
_patchedEa020eLookupCall = true;
Console.Error.WriteLine($"[LOADER][WARNING] Import#{dispatchIndex}: patched hash-lookup call at 0x{num:X16} -> NOP*5");
}
catch
{
}
finally
{
if (flNewProtect != 0)
{
VirtualProtect((void*)num, 5u, flNewProtect, &flNewProtect);
}
}
}
}
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