mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-08-20 07:38:42 +02:00
328 lines
13 KiB
C#
328 lines
13 KiB
C#
|
using ARMeilleure.IntermediateRepresentation;
|
|||
|
using ARMeilleure.Translation;
|
|||
|
using System;
|
|||
|
using System.Runtime.CompilerServices;
|
|||
|
using System.Runtime.InteropServices;
|
|||
|
|
|||
|
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
|
|||
|
|
|||
|
namespace ARMeilleure.Signal
|
|||
|
{
|
|||
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|||
|
struct SignalHandlerRange
|
|||
|
{
|
|||
|
public int IsActive;
|
|||
|
public nuint RangeAddress;
|
|||
|
public nuint RangeEndAddress;
|
|||
|
public IntPtr ActionPointer;
|
|||
|
}
|
|||
|
|
|||
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|||
|
struct SignalHandlerConfig
|
|||
|
{
|
|||
|
/// <summary>
|
|||
|
/// The byte offset of the faulting address in the SigInfo or ExceptionRecord struct.
|
|||
|
/// </summary>
|
|||
|
public int StructAddressOffset;
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// The byte offset of the write flag in the SigInfo or ExceptionRecord struct.
|
|||
|
/// </summary>
|
|||
|
public int StructWriteOffset;
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// The sigaction handler that was registered before this one. (unix only)
|
|||
|
/// </summary>
|
|||
|
public nuint UnixOldSigaction;
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// The type of the previous sigaction. True for the 3 argument variant. (unix only)
|
|||
|
/// </summary>
|
|||
|
public int UnixOldSigaction3Arg;
|
|||
|
|
|||
|
public SignalHandlerRange Range0;
|
|||
|
public SignalHandlerRange Range1;
|
|||
|
public SignalHandlerRange Range2;
|
|||
|
public SignalHandlerRange Range3;
|
|||
|
public SignalHandlerRange Range4;
|
|||
|
public SignalHandlerRange Range5;
|
|||
|
public SignalHandlerRange Range6;
|
|||
|
public SignalHandlerRange Range7;
|
|||
|
}
|
|||
|
|
|||
|
public static class NativeSignalHandler
|
|||
|
{
|
|||
|
private delegate void UnixExceptionHandler(int sig, IntPtr info, IntPtr ucontext);
|
|||
|
[UnmanagedFunctionPointer(CallingConvention.Winapi)]
|
|||
|
private delegate int VectoredExceptionHandler(IntPtr exceptionInfo);
|
|||
|
|
|||
|
private const int MaxTrackedRanges = 8;
|
|||
|
|
|||
|
private const int StructAddressOffset = 0;
|
|||
|
private const int StructWriteOffset = 4;
|
|||
|
private const int UnixOldSigaction = 8;
|
|||
|
private const int UnixOldSigaction3Arg = 16;
|
|||
|
private const int RangeOffset = 20;
|
|||
|
|
|||
|
private const int EXCEPTION_CONTINUE_SEARCH = 0;
|
|||
|
private const int EXCEPTION_CONTINUE_EXECUTION = -1;
|
|||
|
|
|||
|
private const uint EXCEPTION_ACCESS_VIOLATION = 0xc0000005;
|
|||
|
|
|||
|
private const ulong PageSize = 0x1000;
|
|||
|
private const ulong PageMask = PageSize - 1;
|
|||
|
|
|||
|
private static IntPtr _handlerConfig;
|
|||
|
private static IntPtr _signalHandlerPtr;
|
|||
|
private static IntPtr _signalHandlerHandle;
|
|||
|
|
|||
|
private static readonly object _lock = new object();
|
|||
|
private static bool _initialized;
|
|||
|
|
|||
|
static NativeSignalHandler()
|
|||
|
{
|
|||
|
_handlerConfig = Marshal.AllocHGlobal(Unsafe.SizeOf<SignalHandlerConfig>());
|
|||
|
ref SignalHandlerConfig config = ref GetConfigRef();
|
|||
|
|
|||
|
config = new SignalHandlerConfig();
|
|||
|
}
|
|||
|
|
|||
|
public static void InitializeSignalHandler()
|
|||
|
{
|
|||
|
if (_initialized) return;
|
|||
|
|
|||
|
lock (_lock)
|
|||
|
{
|
|||
|
if (_initialized) return;
|
|||
|
|
|||
|
Translator.PreparePool();
|
|||
|
|
|||
|
bool unix = RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
|
|||
|
ref SignalHandlerConfig config = ref GetConfigRef();
|
|||
|
|
|||
|
if (unix)
|
|||
|
{
|
|||
|
// Unix siginfo struct locations.
|
|||
|
// NOTE: These are incredibly likely to be different between kernel version and architectures.
|
|||
|
|
|||
|
config.StructAddressOffset = 16; // si_addr
|
|||
|
config.StructWriteOffset = 8; // si_code
|
|||
|
|
|||
|
_signalHandlerPtr = Marshal.GetFunctionPointerForDelegate(GenerateUnixSignalHandler(_handlerConfig));
|
|||
|
|
|||
|
SigAction old = UnixSignalHandlerRegistration.RegisterExceptionHandler(_signalHandlerPtr);
|
|||
|
config.UnixOldSigaction = (nuint)(ulong)old.sa_handler;
|
|||
|
config.UnixOldSigaction3Arg = old.sa_flags & 4;
|
|||
|
}
|
|||
|
else
|
|||
|
{
|
|||
|
config.StructAddressOffset = 40; // ExceptionInformation1
|
|||
|
config.StructWriteOffset = 32; // ExceptionInformation0
|
|||
|
|
|||
|
_signalHandlerPtr = Marshal.GetFunctionPointerForDelegate(GenerateWindowsSignalHandler(_handlerConfig));
|
|||
|
|
|||
|
_signalHandlerHandle = WindowsSignalHandlerRegistration.RegisterExceptionHandler(_signalHandlerPtr);
|
|||
|
}
|
|||
|
|
|||
|
Translator.ResetPool();
|
|||
|
|
|||
|
Translator.DisposePools();
|
|||
|
|
|||
|
_initialized = true;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
private static unsafe ref SignalHandlerConfig GetConfigRef()
|
|||
|
{
|
|||
|
return ref Unsafe.AsRef<SignalHandlerConfig>((void*)_handlerConfig);
|
|||
|
}
|
|||
|
|
|||
|
public static unsafe bool AddTrackedRegion(nuint address, nuint endAddress, IntPtr action)
|
|||
|
{
|
|||
|
var ranges = &((SignalHandlerConfig*)_handlerConfig)->Range0;
|
|||
|
|
|||
|
for (int i = 0; i < MaxTrackedRanges; i++)
|
|||
|
{
|
|||
|
if (ranges[i].IsActive == 0)
|
|||
|
{
|
|||
|
ranges[i].RangeAddress = address;
|
|||
|
ranges[i].RangeEndAddress = endAddress;
|
|||
|
ranges[i].ActionPointer = action;
|
|||
|
ranges[i].IsActive = 1;
|
|||
|
|
|||
|
return true;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
return false;
|
|||
|
}
|
|||
|
|
|||
|
public static unsafe bool RemoveTrackedRegion(nuint address)
|
|||
|
{
|
|||
|
var ranges = &((SignalHandlerConfig*)_handlerConfig)->Range0;
|
|||
|
|
|||
|
for (int i = 0; i < MaxTrackedRanges; i++)
|
|||
|
{
|
|||
|
if (ranges[i].IsActive == 1 && ranges[i].RangeAddress == address)
|
|||
|
{
|
|||
|
ranges[i].IsActive = 0;
|
|||
|
|
|||
|
return true;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
return false;
|
|||
|
}
|
|||
|
|
|||
|
private static Operand EmitGenericRegionCheck(EmitterContext context, IntPtr signalStructPtr, Operand faultAddress, Operand isWrite)
|
|||
|
{
|
|||
|
Operand inRegionLocal = context.AllocateLocal(OperandType.I32);
|
|||
|
context.Copy(inRegionLocal, Const(0));
|
|||
|
|
|||
|
Operand endLabel = Label();
|
|||
|
|
|||
|
for (int i = 0; i < MaxTrackedRanges; i++)
|
|||
|
{
|
|||
|
ulong rangeBaseOffset = (ulong)(RangeOffset + i * Unsafe.SizeOf<SignalHandlerRange>());
|
|||
|
|
|||
|
Operand nextLabel = Label();
|
|||
|
|
|||
|
Operand isActive = context.Load(OperandType.I32, Const((ulong)signalStructPtr + rangeBaseOffset));
|
|||
|
|
|||
|
context.BranchIfFalse(nextLabel, isActive);
|
|||
|
|
|||
|
Operand rangeAddress = context.Load(OperandType.I64, Const((ulong)signalStructPtr + rangeBaseOffset + 4));
|
|||
|
Operand rangeEndAddress = context.Load(OperandType.I64, Const((ulong)signalStructPtr + rangeBaseOffset + 12));
|
|||
|
|
|||
|
// Is the fault address within this tracked region?
|
|||
|
Operand inRange = context.BitwiseAnd(
|
|||
|
context.ICompare(faultAddress, rangeAddress, Comparison.GreaterOrEqualUI),
|
|||
|
context.ICompare(faultAddress, rangeEndAddress, Comparison.Less)
|
|||
|
);
|
|||
|
|
|||
|
// Only call tracking if in range.
|
|||
|
context.BranchIfFalse(nextLabel, inRange, BasicBlockFrequency.Cold);
|
|||
|
|
|||
|
context.Copy(inRegionLocal, Const(1));
|
|||
|
Operand offset = context.BitwiseAnd(context.Subtract(faultAddress, rangeAddress), Const(~PageMask));
|
|||
|
|
|||
|
// Call the tracking action, with the pointer's relative offset to the base address.
|
|||
|
Operand trackingActionPtr = context.Load(OperandType.I64, Const((ulong)signalStructPtr + rangeBaseOffset + 20));
|
|||
|
context.Call(trackingActionPtr, OperandType.I32, offset, Const(PageSize), isWrite);
|
|||
|
|
|||
|
context.Branch(endLabel);
|
|||
|
|
|||
|
context.MarkLabel(nextLabel);
|
|||
|
}
|
|||
|
|
|||
|
context.MarkLabel(endLabel);
|
|||
|
|
|||
|
return context.Copy(inRegionLocal);
|
|||
|
}
|
|||
|
|
|||
|
private static UnixExceptionHandler GenerateUnixSignalHandler(IntPtr signalStructPtr)
|
|||
|
{
|
|||
|
EmitterContext context = new EmitterContext();
|
|||
|
|
|||
|
// (int sig, SigInfo* sigInfo, void* ucontext)
|
|||
|
Operand sigInfoPtr = context.LoadArgument(OperandType.I64, 1);
|
|||
|
|
|||
|
Operand structAddressOffset = context.Load(OperandType.I64, Const((ulong)signalStructPtr + StructAddressOffset));
|
|||
|
Operand structWriteOffset = context.Load(OperandType.I64, Const((ulong)signalStructPtr + StructWriteOffset));
|
|||
|
|
|||
|
Operand faultAddress = context.Load(OperandType.I64, context.Add(sigInfoPtr, context.ZeroExtend32(OperandType.I64, structAddressOffset)));
|
|||
|
Operand writeFlag = context.Load(OperandType.I64, context.Add(sigInfoPtr, context.ZeroExtend32(OperandType.I64, structWriteOffset)));
|
|||
|
|
|||
|
Operand isWrite = context.ICompareNotEqual(writeFlag, Const(0L)); // Normalize to 0/1.
|
|||
|
|
|||
|
Operand isInRegion = EmitGenericRegionCheck(context, signalStructPtr, faultAddress, isWrite);
|
|||
|
|
|||
|
Operand endLabel = Label();
|
|||
|
|
|||
|
context.BranchIfTrue(endLabel, isInRegion);
|
|||
|
|
|||
|
Operand unixOldSigaction = context.Load(OperandType.I64, Const((ulong)signalStructPtr + UnixOldSigaction));
|
|||
|
Operand unixOldSigaction3Arg = context.Load(OperandType.I64, Const((ulong)signalStructPtr + UnixOldSigaction3Arg));
|
|||
|
Operand threeArgLabel = Label();
|
|||
|
|
|||
|
context.BranchIfTrue(threeArgLabel, unixOldSigaction3Arg);
|
|||
|
|
|||
|
context.Call(unixOldSigaction, OperandType.None, context.LoadArgument(OperandType.I32, 0));
|
|||
|
context.Branch(endLabel);
|
|||
|
|
|||
|
context.MarkLabel(threeArgLabel);
|
|||
|
|
|||
|
context.Call(unixOldSigaction,
|
|||
|
OperandType.None,
|
|||
|
context.LoadArgument(OperandType.I32, 0),
|
|||
|
sigInfoPtr,
|
|||
|
context.LoadArgument(OperandType.I64, 2)
|
|||
|
);
|
|||
|
|
|||
|
context.MarkLabel(endLabel);
|
|||
|
|
|||
|
context.Return();
|
|||
|
|
|||
|
ControlFlowGraph cfg = context.GetControlFlowGraph();
|
|||
|
|
|||
|
OperandType[] argTypes = new OperandType[] { OperandType.I32, OperandType.I64, OperandType.I64 };
|
|||
|
|
|||
|
return Compiler.Compile<UnixExceptionHandler>(cfg, argTypes, OperandType.None, CompilerOptions.HighCq);
|
|||
|
}
|
|||
|
|
|||
|
private static VectoredExceptionHandler GenerateWindowsSignalHandler(IntPtr signalStructPtr)
|
|||
|
{
|
|||
|
EmitterContext context = new EmitterContext();
|
|||
|
|
|||
|
// (ExceptionPointers* exceptionInfo)
|
|||
|
Operand exceptionInfoPtr = context.LoadArgument(OperandType.I64, 0);
|
|||
|
Operand exceptionRecordPtr = context.Load(OperandType.I64, exceptionInfoPtr);
|
|||
|
|
|||
|
// First thing's first - this catches a number of exceptions, but we only want access violations.
|
|||
|
Operand validExceptionLabel = Label();
|
|||
|
|
|||
|
Operand exceptionCode = context.Load(OperandType.I32, exceptionRecordPtr);
|
|||
|
|
|||
|
context.BranchIf(validExceptionLabel, exceptionCode, Const(EXCEPTION_ACCESS_VIOLATION), Comparison.Equal);
|
|||
|
|
|||
|
context.Return(Const(EXCEPTION_CONTINUE_SEARCH)); // Don't handle this one.
|
|||
|
|
|||
|
context.MarkLabel(validExceptionLabel);
|
|||
|
|
|||
|
// Next, read the address of the invalid access, and whether it is a write or not.
|
|||
|
|
|||
|
Operand structAddressOffset = context.Load(OperandType.I32, Const((ulong)signalStructPtr + StructAddressOffset));
|
|||
|
Operand structWriteOffset = context.Load(OperandType.I32, Const((ulong)signalStructPtr + StructWriteOffset));
|
|||
|
|
|||
|
Operand faultAddress = context.Load(OperandType.I64, context.Add(exceptionRecordPtr, context.ZeroExtend32(OperandType.I64, structAddressOffset)));
|
|||
|
Operand writeFlag = context.Load(OperandType.I64, context.Add(exceptionRecordPtr, context.ZeroExtend32(OperandType.I64, structWriteOffset)));
|
|||
|
|
|||
|
Operand isWrite = context.ICompareNotEqual(writeFlag, Const(0L)); // Normalize to 0/1.
|
|||
|
|
|||
|
Operand isInRegion = EmitGenericRegionCheck(context, signalStructPtr, faultAddress, isWrite);
|
|||
|
|
|||
|
Operand endLabel = Label();
|
|||
|
|
|||
|
// If the region check result is false, then run the next vectored exception handler.
|
|||
|
|
|||
|
context.BranchIfTrue(endLabel, isInRegion);
|
|||
|
|
|||
|
context.Return(Const(EXCEPTION_CONTINUE_SEARCH));
|
|||
|
|
|||
|
context.MarkLabel(endLabel);
|
|||
|
|
|||
|
// Otherwise, return to execution.
|
|||
|
|
|||
|
context.Return(Const(EXCEPTION_CONTINUE_EXECUTION));
|
|||
|
|
|||
|
// Compile and return the function.
|
|||
|
|
|||
|
ControlFlowGraph cfg = context.GetControlFlowGraph();
|
|||
|
|
|||
|
OperandType[] argTypes = new OperandType[] { OperandType.I64 };
|
|||
|
|
|||
|
return Compiler.Compile<VectoredExceptionHandler>(cfg, argTypes, OperandType.I32, CompilerOptions.HighCq);
|
|||
|
}
|
|||
|
}
|
|||
|
}
|