private static unsafe RuntimeFunction *FunctionTableHandler(ulong controlPc, IntPtr context)
{
int offset = (int)((long)controlPc - context.ToInt64());
if (!JitCache.TryFind(offset, out JitCacheEntry funcEntry))
{
// Not found.
return(null);
}
var unwindInfo = funcEntry.UnwindInfo;
int codeIndex = 0;
int spOffset = unwindInfo.FixedAllocSize;
foreach (var entry in unwindInfo.PushEntries)
{
if (entry.Type == RegisterType.Vector)
{
spOffset -= 16;
}
}
for (int index = unwindInfo.PushEntries.Length - 1; index >= 0; index--)
{
var entry = unwindInfo.PushEntries[index];
if (entry.Type == RegisterType.Vector)
{
ushort uwop = PackUwop(UnwindOperation.SaveXmm128, entry.StreamEndOffset, entry.Index);
_unwindInfo->UnwindCodes[codeIndex++] = uwop;
_unwindInfo->UnwindCodes[codeIndex++] = (ushort)spOffset;
spOffset += 16;
}
}
_unwindInfo->UnwindCodes[0] = PackUwop(UnwindOperation.AllocLarge, unwindInfo.PrologueSize, 1);
_unwindInfo->UnwindCodes[1] = (ushort)(unwindInfo.FixedAllocSize >> 0);
_unwindInfo->UnwindCodes[2] = (ushort)(unwindInfo.FixedAllocSize >> 16);
codeIndex += 3;
for (int index = unwindInfo.PushEntries.Length - 1; index >= 0; index--)
{
var entry = unwindInfo.PushEntries[index];
if (entry.Type == RegisterType.Integer)
{
ushort uwop = PackUwop(UnwindOperation.PushNonvol, entry.StreamEndOffset, entry.Index);
_unwindInfo->UnwindCodes[codeIndex++] = uwop;
}
}
_unwindInfo->VersionAndFlags = 1;
_unwindInfo->SizeOfProlog = (byte)unwindInfo.PrologueSize;
_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 unsafe RuntimeFunction *FunctionTableHandler(ulong controlPc, IntPtr context)
{
int offset = (int)((long)controlPc - context.ToInt64());
if (!JitCache.TryFind(offset, out JitCacheEntry 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(UnwindOperation.SaveXmm128, entry.PrologOffset, entry.RegIndex);
_unwindInfo->UnwindCodes[codeIndex++] = (ushort)(stackOffset / 16);
}
else
{
_unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOperation.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(UnwindOperation.AllocSmall, entry.PrologOffset, (allocSize / 8) - 1);
}
else if (allocSize <= 0x7FFF8)
{
_unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOperation.AllocLarge, entry.PrologOffset, 0);
_unwindInfo->UnwindCodes[codeIndex++] = (ushort)(allocSize / 8);
}
else
{
_unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOperation.AllocLarge, entry.PrologOffset, 1);
_unwindInfo->UnwindCodes[codeIndex++] = (ushort)(allocSize >> 0);
_unwindInfo->UnwindCodes[codeIndex++] = (ushort)(allocSize >> 16);
}
break;
}
case UnwindPseudoOp.PushReg:
{
_unwindInfo->UnwindCodes[codeIndex++] = PackUnwindOp(UnwindOperation.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);
}
