File: stackguard-macros.h

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glibc 2.19-12
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#include <stdint.h>

#define STACK_CHK_GUARD \
  ({ uintptr_t x; asm ("ld [%%g7+0x14], %0" : "=r" (x)); x; })

#define POINTER_CHK_GUARD \
  ({ uintptr_t x; asm ("ld [%%g7+0x18], %0" : "=r" (x)); x; })