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[RTL] Fix RtlSetUnwindContext

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Only set the registers requested by ContextFlags
This commit is contained in:
Timo Kreuzer 2025-07-09 21:10:17 +03:00
parent d23ee5f365
commit 98ed87b556
1 changed files with 24 additions and 14 deletions
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38
sdk/lib/rtl/amd64/unwind.c
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@ -1141,25 +1141,35 @@ RtlSetUnwindContext(
_In_ DWORD64 TargetFrame)
{
KNONVOLATILE_CONTEXT_POINTERS ContextPointers;
ULONG ContextFlags = Context->ContextFlags & ~CONTEXT_AMD64;
/* Capture pointers to the non-volatiles up to the target frame */
RtlpCaptureNonVolatileContextPointers(&ContextPointers, TargetFrame);
/* Copy the nonvolatiles to the captured locations */
*ContextPointers.R12 = Context->R12;
*ContextPointers.R13 = Context->R13;
*ContextPointers.R14 = Context->R14;
*ContextPointers.R15 = Context->R15;
*ContextPointers.Xmm6 = Context->Xmm6;
*ContextPointers.Xmm7 = Context->Xmm7;
*ContextPointers.Xmm8 = Context->Xmm8;
*ContextPointers.Xmm9 = Context->Xmm9;
*ContextPointers.Xmm10 = Context->Xmm10;
*ContextPointers.Xmm11 = Context->Xmm11;
*ContextPointers.Xmm12 = Context->Xmm12;
*ContextPointers.Xmm13 = Context->Xmm13;
*ContextPointers.Xmm14 = Context->Xmm14;
*ContextPointers.Xmm15 = Context->Xmm15;
if (ContextFlags & CONTEXT_INTEGER)
{
*ContextPointers.Rbx = Context->Rbx;
*ContextPointers.Rsi = Context->Rsi;
*ContextPointers.Rdi = Context->Rdi;
*ContextPointers.R12 = Context->R12;
*ContextPointers.R13 = Context->R13;
*ContextPointers.R14 = Context->R14;
*ContextPointers.R15 = Context->R15;
}
if (ContextFlags & CONTEXT_FLOATING_POINT)
{
*ContextPointers.Xmm6 = Context->Xmm6;
*ContextPointers.Xmm7 = Context->Xmm7;
*ContextPointers.Xmm8 = Context->Xmm8;
*ContextPointers.Xmm9 = Context->Xmm9;
*ContextPointers.Xmm10 = Context->Xmm10;
*ContextPointers.Xmm11 = Context->Xmm11;
*ContextPointers.Xmm12 = Context->Xmm12;
*ContextPointers.Xmm13 = Context->Xmm13;
*ContextPointers.Xmm14 = Context->Xmm14;
*ContextPointers.Xmm15 = Context->Xmm15;
}
}
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