private void GenerateTrampolineInner(out int trampolineLength, out int jmpLength)
{
if (TrampolinePtr != IntPtr.Zero)
{
trampolineLength = TrampolineSize;
jmpLength = TrampolineJmpSize;
return;
}
var instructionBuffer = new byte[32];
Marshal.Copy(OriginalFunctionPtr, instructionBuffer, 0, 32);
var trampolineAlloc = PageAllocator.Instance.Allocate(OriginalFunctionPtr);
logger.Log(LogLevel.Debug,
$"Original: {OriginalFunctionPtr.ToInt64():X}, Trampoline: {trampolineAlloc:X}, diff: {Math.Abs(OriginalFunctionPtr.ToInt64() - trampolineAlloc):X}; is within +-1GB range: {PageAllocator.IsInRelJmpRange(OriginalFunctionPtr, trampolineAlloc)}");
DetourHelper.Native.MakeWritable(trampolineAlloc, PageAllocator.PAGE_SIZE);
var arch = IntPtr.Size == 8 ? Architecture.X64 : Architecture.X86;
DetourGenerator.CreateTrampolineFromFunction(instructionBuffer, OriginalFunctionPtr, trampolineAlloc,
DetourGenerator.GetDetourLength(arch), arch,
out trampolineLength, out jmpLength);
DetourHelper.Native.MakeExecutable(trampolineAlloc, PageAllocator.PAGE_SIZE);
TrampolinePtr = trampolineAlloc;
TrampolineSize = trampolineLength;
TrampolineJmpSize = jmpLength;
}
private void GenerateTrampolineInner(out int trampolineLength, out int jmpLength)
{
if (TrampolinePtr != IntPtr.Zero)
{
trampolineLength = TrampolineSize;
jmpLength = TrampolineJmpSize;
return;
}
byte[] instructionBuffer = new byte[32];
Marshal.Copy(OriginalFunctionPtr, instructionBuffer, 0, 32);
var trampolineAlloc = DetourHelper.Native.MemAlloc(80);
DetourHelper.Native.MakeWritable(trampolineAlloc, 80);
var arch = IntPtr.Size == 8 ? Architecture.X64 : Architecture.X86;
DetourGenerator.CreateTrampolineFromFunction(instructionBuffer, OriginalFunctionPtr, trampolineAlloc,
DetourGenerator.GetDetourLength(arch), arch, out trampolineLength, out jmpLength);
DetourHelper.Native.MakeExecutable(trampolineAlloc, 80);
TrampolinePtr = trampolineAlloc;
TrampolineSize = trampolineLength;
TrampolineJmpSize = jmpLength;
}