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glibc/ports/sysdeps/ia64/stackguard-macros.h

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#include <stdint.h>
#define STACK_CHK_GUARD \
({ uintptr_t x; asm ("adds %0 = -8, r13;; ld8 %0 = [%0]" : "=r" (x)); x; })
#define POINTER_CHK_GUARD \
({ uintptr_t x; asm ("adds %0 = -16, r13;; ld8 %0 = [%0]" : "=r" (x)); x; })