diff options
Diffstat (limited to 'sys-block/fio/files/fio-2.0.14-pic-clobber-fix.patch')
| -rw-r--r-- | sys-block/fio/files/fio-2.0.14-pic-clobber-fix.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sys-block/fio/files/fio-2.0.14-pic-clobber-fix.patch b/sys-block/fio/files/fio-2.0.14-pic-clobber-fix.patch new file mode 100644 index 000000000000..fa35e27c754e --- /dev/null +++ b/sys-block/fio/files/fio-2.0.14-pic-clobber-fix.patch @@ -0,0 +1,29 @@ +diff -Nuar fio-2.0.14.orig/arch/arch-x86-common.h fio-2.0.14/arch/arch-x86-common.h +--- fio-2.0.14.orig/arch/arch-x86-common.h 2013-02-21 18:12:32.000000000 +0000 ++++ fio-2.0.14/arch/arch-x86-common.h 2013-03-27 01:48:04.000000000 +0000 +@@ -6,10 +6,24 @@ + static inline void do_cpuid(unsigned int *eax, unsigned int *ebx, + unsigned int *ecx, unsigned int *edx) + { ++#ifdef __PIC__ ++ /* 32-bit Hardened GCC (PIC) uses register EBX, so it must be preserved ++ * Fix ported from Gentoo's x86info-1.24-pic patch ++ * http://tuxion.com/2010/07/02/clobber-registers.html */ ++ asm volatile( ++ "movl %%ebx,%%edi\n" ++ "cpuid\n" ++ "movl %%ebx,%1\n" ++ "movl %%edi,%%ebx\n" ++ : "=a" (*eax), "=m" (*ebx), "=c" (*ecx), "=d" (*edx) ++ : "0" (*eax), "2" (*ecx) ++ : "memory", "%edi"); ++#else + asm volatile("cpuid" + : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) + : "0" (*eax), "2" (*ecx) + : "memory"); ++#endif + } + + static inline void cpuid(unsigned int op, + |