Re: [PATCH v5 0/1] MR8466: ntdll: Also restore rbp before calling user mode callback.

[Paul Gofman (＠gofman)]

On Sat Jul  5 01:55:26 2025 +0000, Yuxuan Shui wrote:
> Actually, [looks
> like](https://testbot.winehq.org/JobDetails.pl?Key=159099) all
> non-volatile registers are actually all _zeroed_ before calling user callback.
> But your test shows (Win11):
rip=00007ff750e81a12 rsp=00000010617ff900 rbp=00000010617ffa70 eflags=00000202
rax=00007ffd89112a00 rbx=0000000000000000 rcx=00000010617ff0f0 rdx=0000000000000082
rsi=0000000000000000 rdi=0000000000000000  r8=0000000000000000  r9=0000000000000000
r10=cf18061710d6ea70 r11=0000000000000246 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000 mxcsr=00001f80
rip=00007ff750e81a25 rsp=00000010617ff900 rbp=00000010617ffa70 eflags=00000246
rax=00007ffd89112a00 rbx=00000000deadbeaf rcx=00007ff750e87040 rdx=0000000000000000
rsi=00000000deadbeaf rdi=00000000deadbeaf  r8=00000010617ff8c8  r9=0000000000000000
r10=0000000000000000 r11=0000000000000246 r12=00000000deadbeaf r13=00000000deadbeaf
r14=00000000deadbeaf r15=0000000000000000 mxcsr=00001f80

I see many non-volatile registers actually restored to 0xdeadbeef. For others, I am not immediately fully sure if they were actually deadbeef'ed ("i", "j", "k" thing is hard to follow), or werent' altered after before getting to the unwind target place.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/8466#note_108879