diff options
Diffstat (limited to 'ARMeilleure/Translation/Cache/JitUnwindWindows.cs')
| -rw-r--r-- | ARMeilleure/Translation/Cache/JitUnwindWindows.cs | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/ARMeilleure/Translation/Cache/JitUnwindWindows.cs b/ARMeilleure/Translation/Cache/JitUnwindWindows.cs deleted file mode 100644 index 77727bf1..00000000 --- a/ARMeilleure/Translation/Cache/JitUnwindWindows.cs +++ /dev/null @@ -1,189 +0,0 @@ -// https://github.com/MicrosoftDocs/cpp-docs/blob/master/docs/build/exception-handling-x64.md - -using ARMeilleure.CodeGen.Unwinding; -using System; -using System.Diagnostics; -using System.Runtime.InteropServices; - -namespace ARMeilleure.Translation.Cache -{ - static partial class JitUnwindWindows - { - private const int MaxUnwindCodesArraySize = 32; // Must be an even value. - - private struct RuntimeFunction - { - public uint BeginAddress; - public uint EndAddress; - public uint UnwindData; - } - - private struct UnwindInfo - { - public byte VersionAndFlags; - public byte SizeOfProlog; - public byte CountOfUnwindCodes; - public byte FrameRegister; - public unsafe fixed ushort UnwindCodes[MaxUnwindCodesArraySize]; - } - - private enum UnwindOp - { - PushNonvol = 0, - AllocLarge = 1, - AllocSmall = 2, - SetFpreg = 3, - SaveNonvol = 4, - SaveNonvolFar = 5, - SaveXmm128 = 8, - SaveXmm128Far = 9, - PushMachframe = 10 - } - - private unsafe delegate RuntimeFunction* GetRuntimeFunctionCallback(ulong controlPc, IntPtr context); - - [LibraryImport("kernel32.dll")] - [return: MarshalAs(UnmanagedType.Bool)] - private static unsafe partial bool RtlInstallFunctionTableCallback( - ulong tableIdentifier, - ulong baseAddress, - uint length, - GetRuntimeFunctionCallback callback, - IntPtr context, - [MarshalAs(UnmanagedType.LPWStr)] string outOfProcessCallbackDll); - - private static GetRuntimeFunctionCallback _getRuntimeFunctionCallback; - - private static int _sizeOfRuntimeFunction; - - private unsafe static RuntimeFunction* _runtimeFunction; - - private unsafe static UnwindInfo* _unwindInfo; - - public static void InstallFunctionTableHandler(IntPtr codeCachePointer, uint codeCacheLength, IntPtr workBufferPtr) - { - ulong codeCachePtr = (ulong)codeCachePointer.ToInt64(); - - _sizeOfRuntimeFunction = Marshal.SizeOf<RuntimeFunction>(); - - bool result; - - unsafe - { - _runtimeFunction = (RuntimeFunction*)workBufferPtr; - - _unwindInfo = (UnwindInfo*)(workBufferPtr + _sizeOfRuntimeFunction); - - _getRuntimeFunctionCallback = new GetRuntimeFunctionCallback(FunctionTableHandler); - - result = RtlInstallFunctionTableCallback( - codeCachePtr | 3, - codeCachePtr, - codeCacheLength, - _getRuntimeFunctionCallback, - codeCachePointer, - null); - } - - if (!result) - { - throw new InvalidOperationException("Failure installing function table callback."); - } - } - - private static unsafe RuntimeFunction* FunctionTableHandler(ulong controlPc, IntPtr context) - { - int offset = (int)((long)controlPc - context.ToInt64()); - - if (!JitCache.TryFind(offset, out CacheEntry funcEntry)) - { - return null; // Not found. - } - - var unwindInfo = funcEntry.UnwindInfo; - - int codeIndex = 0; - - for (int index = unwindInfo.PushEntries.Length - 1; index >= 0; index--) - { - var entry = unwindInfo.PushEntries[index]; - - switch (entry.PseudoOp) - { - case UnwindPseudoOp.SaveXmm128: - { - int stackOffset = entry.StackOffsetOrAllocSize; - - Debug.Assert(stackOffset % 16 == 0); - - if (stackOffset <= 0xFFFF0) - { - _unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOp.SaveXmm128, entry.PrologOffset, entry.RegIndex); - _unwindInfo->UnwindCodes[codeIndex++] = (ushort)(stackOffset / 16); - } - else - { - _unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOp.SaveXmm128Far, entry.PrologOffset, entry.RegIndex); - _unwindInfo->UnwindCodes[codeIndex++] = (ushort)(stackOffset >> 0); - _unwindInfo->UnwindCodes[codeIndex++] = (ushort)(stackOffset >> 16); - } - - break; - } - - case UnwindPseudoOp.AllocStack: - { - int allocSize = entry.StackOffsetOrAllocSize; - - Debug.Assert(allocSize % 8 == 0); - - if (allocSize <= 128) - { - _unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOp.AllocSmall, entry.PrologOffset, (allocSize / 8) - 1); - } - else if (allocSize <= 0x7FFF8) - { - _unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOp.AllocLarge, entry.PrologOffset, 0); - _unwindInfo->UnwindCodes[codeIndex++] = (ushort)(allocSize / 8); - } - else - { - _unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOp.AllocLarge, entry.PrologOffset, 1); - _unwindInfo->UnwindCodes[codeIndex++] = (ushort)(allocSize >> 0); - _unwindInfo->UnwindCodes[codeIndex++] = (ushort)(allocSize >> 16); - } - - break; - } - - case UnwindPseudoOp.PushReg: - { - _unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOp.PushNonvol, entry.PrologOffset, entry.RegIndex); - - break; - } - - default: throw new NotImplementedException($"({nameof(entry.PseudoOp)} = {entry.PseudoOp})"); - } - } - - Debug.Assert(codeIndex <= MaxUnwindCodesArraySize); - - _unwindInfo->VersionAndFlags = 1; // Flags: The function has no handler. - _unwindInfo->SizeOfProlog = (byte)unwindInfo.PrologSize; - _unwindInfo->CountOfUnwindCodes = (byte)codeIndex; - _unwindInfo->FrameRegister = 0; - - _runtimeFunction->BeginAddress = (uint)funcEntry.Offset; - _runtimeFunction->EndAddress = (uint)(funcEntry.Offset + funcEntry.Size); - _runtimeFunction->UnwindData = (uint)_sizeOfRuntimeFunction; - - return _runtimeFunction; - } - - private static ushort PackUnwindOp(UnwindOp op, int prologOffset, int opInfo) - { - return (ushort)(prologOffset | ((int)op << 8) | (opInfo << 12)); - } - } -}
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