[PATCH 3/9] ntdll: Store x86_64 YMM context in syscall frame.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  dlls/ntdll/unix/loader.c        |  2 +-
  dlls/ntdll/unix/signal_arm.c    |  4 +++
  dlls/ntdll/unix/signal_arm64.c  |  3 +++
  dlls/ntdll/unix/signal_i386.c   |  5 ++++
  dlls/ntdll/unix/signal_x86_64.c | 28 +++++++++++++++++++-
  dlls/ntdll/unix/unix_private.h  |  1 +
  dlls/ntdll/unix/virtual.c       |  7 -----
  tools/winebuild/import.c        | 45 +++++++++++++++++++++++++--------
  8 files changed, 76 insertions(+), 19 deletions(-)

[Alexandre Julliard]

Jacek Caban <jacek(a)codeweavers.com> writes:
> /**********************************************************************
>   *             signal_init_threading
>   */
>  void signal_init_threading(void)
>  {
> +    int regs[4];
> +    void *ptr;
> +
> +    extern void __wine_syscall_dispatcher_xsave(void) DECLSPEC_HIDDEN;
> +
> +    ntdll_cpuid( regs, 1, 0 );
> +    if (regs[2] & (0x1 << 27)) /* xsave OS enabled */
> +    {
> +        signal_syscall_dispatcher = __wine_syscall_dispatcher_xsave;
> +    }
> +
> +    /* sneak in a syscall dispatcher pointer at a fixed address (7ffe1000) */
> +    ptr = (char *)user_shared_data + page_size;
> +    anon_mmap_fixed( ptr, page_size, PROT_READ | PROT_WRITE, 0 );
> +    *(void **)ptr = signal_syscall_dispatcher;
>  }

It seems it would be cleaner to do this after we have done the full CPU
detection, and reuse the results instead of duplicating the cpuid checks.

-- 
Alexandre Julliard
julliard(a)winehq.org