1 #include <stdint.h>
2 
3 #define STACK_CHK_GUARD \
4   ({ uintptr_t x; asm ("adds %0 = -8, r13;; ld8 %0 = [%0]" : "=r" (x)); x; })
5 
6 #define POINTER_CHK_GUARD \
7   ({ uintptr_t x; asm ("adds %0 = -16, r13;; ld8 %0 = [%0]" : "=r" (x)); x; })
8