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Merge pull request #443 from idunham/fix 

Workaround PIC limitations in cpuid.
This commit is contained in:
Zhang Xianyi 2014-08-29 13:31:06 +08:00
parent 2702323f7d db7e6366cd
commit 868f8a8756
1 changed files with 8 additions and 1 deletions
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9
cpuid_x86.c
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@ -59,9 +59,16 @@
void cpuid(int op, int *eax, int *ebx, int *ecx, int *edx);
#else
static inline void cpuid(int op, int *eax, int *ebx, int *ecx, int *edx){
#if defined(__i386__) && defined(__PIC__)
__asm__ __volatile__
("mov %%ebx, %%edi;"
"cpuid;"
"xchgl %%ebx, %%edi;"
: "=a" (*eax), "=D" (*ebx), "=c" (*ecx), "=d" (*edx) : "a" (op) : "cc");
#else
__asm__ __volatile__
("cpuid": "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) : "a" (op) : "cc");
#endif
}
#endif