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[RTL/x64] Handle STATUS_UNWIND_CONSOLIDATE in RtlRestoreContext

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It's not entirely correct yet and will probably fail on recursive c++ exceptions, but it fixes basic c++ exception handling.
This commit is contained in:
Timo Kreuzer 2023-10-22 18:21:42 +03:00
parent ff282894a8
commit bb444b93d9
2 changed files with 29 additions and 9 deletions
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23
sdk/lib/rtl/amd64/unwind.c
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@ -1131,3 +1131,26 @@ RtlSetUnwindContext(
*ContextPointers.Xmm14 = Context->Xmm14;
*ContextPointers.Xmm15 = Context->Xmm15;
}
VOID
RtlpRestoreContextInternal(
_In_ PCONTEXT ContextRecord);
VOID
RtlRestoreContext(
_In_ PCONTEXT ContextRecord,
_In_ PEXCEPTION_RECORD ExceptionRecord)
{
if (ExceptionRecord != NULL)
{
if ((ExceptionRecord->ExceptionCode == STATUS_UNWIND_CONSOLIDATE) &&
(ExceptionRecord->NumberParameters >= 1))
{
PVOID (*Consolidate)(EXCEPTION_RECORD*) = (PVOID)ExceptionRecord->ExceptionInformation[0];
// FIXME: This should be called through an asm wrapper to allow handling recursive unwinding
ContextRecord->Rip = (ULONG64)Consolidate(ExceptionRecord);
}
}
RtlpRestoreContextInternal(ContextRecord);
}