File: stackguard-macros.h

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glibc 2.28-7
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#include <stdint.h>

#define STACK_CHK_GUARD \
  ({ uintptr_t x; asm ("ldx [%%g7+0x28], %0" : "=r" (x)); x; })

#define POINTER_CHK_GUARD \
  ({ uintptr_t x; asm ("ldx [%%g7+0x30], %0" : "=r" (x)); x; })