| make the code work on x86/PIC. this code is only used in the demo, |
| and the overhead of always running this is system noise, so don't |
| bother bracketing with __i386__/__PIC__ defines. |
| |
| http://bugs.gentoo.org/456238 |
| |
| --- a/clearcache.c |
| +++ b/clearcache.c |
| @@ -57,7 +57,7 @@ void clearcache(unsigned char *mem, unsigned size) |
| #if defined(__i386__) || defined(__x86_64__) |
| unsigned i, cl, eax, feat; |
| /* get clflush unit and feature */ |
| - asm("cpuid" : "=a" (eax), "=b" (cl), "=d" (feat) : "0" (1) : "cx"); |
| + asm("xchg %%ebx, %%esi; cpuid; xchg %%esi, %%ebx;" : "=a" (eax), "=S" (cl), "=d" (feat) : "0" (1) : "cx"); |
| if (!(feat & (1 << 19))) |
| fallback_clearcache(); |
| cl = ((cl >> 8) & 0xff) * 8; |
