Jacek Caban : ntdll: Don't use inline assembly in do_cpuid.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d0413d833f430a487589283c53f797da2b4f48a0
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=d0413d833f430a487589283c5...

Author: Jacek Caban 
Date:   Fri Dec 17 15:57:32 2021 +0100

ntdll: Don't use inline assembly in do_cpuid.

Avoids problems on old GCC.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51862
Signed-off-by: Jacek Caban 
Signed-off-by: Alexandre Julliard

---

dlls/ntdll/unix/system.c | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/dlls/ntdll/unix/system.c b/dlls/ntdll/unix/system.c
index c2f1ee11eca..9f49b9e6f58 100644
--- a/dlls/ntdll/unix/system.c
+++ b/dlls/ntdll/unix/system.c
@@ -249,10 +249,36 @@ BOOL xstate_compaction_enabled = FALSE;
 #define INEI	0x49656e69	/* "ineI" */
 #define NTEL	0x6c65746e	/* "ntel" */

-static inline void do_cpuid(unsigned int ax, unsigned int cx, unsigned int *p)
-{
-    __asm__ ("cpuid" : "=a"(p[0]), "=b" (p[1]), "=c"(p[2]), "=d"(p[3]) : "a"(ax), "c"(cx));
-}
+extern void do_cpuid( unsigned int ax, unsigned int cx, unsigned int *p ) DECLSPEC_HIDDEN;
+#ifdef __i386__
+__ASM_GLOBAL_FUNC( do_cpuid,
+                   "pushl %esi\n\t"
+                   "pushl %ebx\n\t"
+                   "movl 12(%esp),%eax\n\t"
+                   "movl 16(%esp),%ecx\n\t"
+                   "movl 20(%esp),%esi\n\t"
+                   "cpuid\n\t"
+                   "movl %eax,(%esi)\n\t"
+                   "movl %ebx,4(%esi)\n\t"
+                   "movl %ecx,8(%esi)\n\t"
+                   "movl %edx,12(%esi)\n\t"
+                   "popl %ebx\n\t"
+                   "popl %esi\n\t"
+                   "ret" )
+#else
+__ASM_GLOBAL_FUNC( do_cpuid,
+                   "pushq %rbx\n\t"
+                   "movl %edi,%eax\n\t"
+                   "movl %esi,%ecx\n\t"
+                   "movq %rdx,%r8\n\t"
+                   "cpuid\n\t"
+                   "movl %eax,(%r8)\n\t"
+                   "movl %ebx,4(%r8)\n\t"
+                   "movl %ecx,8(%r8)\n\t"
+                   "movl %edx,12(%r8)\n\t"
+                   "popq %rbx\n\t"
+                   "ret" )
+#endif

#ifdef __i386__
 extern int have_cpuid(void) DECLSPEC_HIDDEN;