diff options
Diffstat (limited to 'libc/sysdeps/i386/stackguard-macros.h')
| -rw-r--r-- | libc/sysdeps/i386/stackguard-macros.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libc/sysdeps/i386/stackguard-macros.h b/libc/sysdeps/i386/stackguard-macros.h index 8c31e197e..039762927 100644 --- a/libc/sysdeps/i386/stackguard-macros.h +++ b/libc/sysdeps/i386/stackguard-macros.h @@ -2,3 +2,11 @@ #define STACK_CHK_GUARD \ ({ uintptr_t x; asm ("movl %%gs:0x14, %0" : "=r" (x)); x; }) + +#define POINTER_CHK_GUARD \ + ({ \ + uintptr_t x; \ + asm ("movl %%gs:%c1, %0" : "=r" (x) \ + : "i" (offsetof (tcbhead_t, pointer_guard))); \ + x; \ + }) |