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dbghelp: Stop unwinding on potential 64bit frame for i386 cpu.

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Transform potential error on 32 => 64 bit transition with
end of stack (needed in new wow64 for dbghelp's stackwalk tests).

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
This commit is contained in:
Eric Pouech 2023-02-01 16:22:52 +01:00 committed by Alexandre Julliard
parent 002057543d
commit 7de1284b59
1 changed files with 8 additions and 1 deletions
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9
dlls/dbghelp/cpu_i386.c
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@ -473,7 +473,14 @@ static BOOL i386_stack_walk(struct cpu_stack_walk *csw, STACKFRAME64 *frame,
union ctx newctx = *context;
if (!fetch_next_frame32(csw, &newctx, frame->AddrPC.Offset - deltapc))
goto done_err;
{
/* When running on wow64 setup, frame below can a 64 bit frame.
* As we don't expose 64bit frames for now, pretend it's the first frame.
*/
if (frame->AddrPC.Offset == 0)
goto done_err;
newctx.x86.Eip = 0;
}
frame->AddrReturn.Mode = AddrModeFlat;
frame->AddrReturn.Offset = newctx.x86.Eip;