Re: [PATCH v4 0/1] MR8466: ntdll: Also restore rbp before calling user mode callback.

[Paul Gofman (＠gofman)]

Paul Gofman (@gofman) commented about dlls/ntdll/unix/signal_x86_64.c:
>                 "movq %r10,0xa0(%rsp)\n\t"  /* frame->prev_frame */
>                 "movq %rsp,0x378(%r13)\n\t" /* thread_data->syscall_frame */
>                 "testl $1,0x380(%r13)\n\t"  /* thread_data->syscall_trace */
> -
>               "movq %r10,%r14\n\t"        /* user_frame (previous thread_data->syscall_frame) */

You can probably use r14 instead of r10 at once and thus avoid adding extra transfer (performance for one extra mov doesn't matter but longer and less obvious code does).