1  #include <stdint.h>
       2  
       3  #define STACK_CHK_GUARD \
       4    ({ uintptr_t x; __asm__ ("ear %0,%%a0; l %0,0x14(%0)" : "=a" (x)); x; })
       5  
       6  /* On s390/s390x there is no unique pointer guard, instead we use the
       7     same value as the stack guard.  */
       8  #define POINTER_CHK_GUARD \
       9    ({								\
      10      uintptr_t x;						\
      11      __asm__ ("ear %0,%%a0; l %0,%1(%0)"				\
      12  	     : "=a" (x)						\
      13  	     : "i" (offsetof (tcbhead_t, stack_guard)));	\
      14      x;								\
      15    })