Don't clobber PIC register on x86.

11 years ago · b4e865f201
parent 61ec6367d0
commit b4e865f201
1 changed files with 5 additions and 3 deletions
--- a/regressions/common.h
+++ b/regressions/common.h
@ -378,17 +378,19 @@ rdtsc(void)
 	return (((uint64_t)edx << 32) | eax);
 #else

-        __asm__ __volatile__("cpuid;"
+        __asm__ __volatile__("pushl %%ebx;"
+                             "cpuid;"
                             "rdtsc;"
                                : "+a" (eax), "=d" (edx)
                                :
-                                : "%ecx", "%ebx", "memory");
+                                : "%ecx", "memory");

        __asm__ __volatile__("xorl %%eax, %%eax;"
                             "cpuid;"
+                             "popl %%ebx;"
                                :
                                :
-                                : "%eax", "%ebx", "%ecx", "%edx", "memory");
+                                : "%eax", "%ecx", "%edx", "memory");

        return (((uint64_t)edx << 32) | eax);
 #endif /* !CK_MD_RDTSCP */