Re: [PATCH v3 0/1] MR8466: ntdll: Also restore rbp before calling user mode callback.

[Paul Gofman (＠gofman)]

> I think @gofman's suggestion is to restore all registers?

No, only non-volatile. As I understand what Alexandre suggests correctly, it is better to just restore those in call_user_mode_callback, in principle similar to what you did but:
- for all non-volatile regs;
- no need to pass additional parameters, you can get those right from frame.

I don't know if that is really necessary, but I personally would go for some test for RtlVirtualUnwind called from window procedure (with something like CreateWindow called from asm code to save non-volatile registers before / after), to make sure we are getting it right.