text: #include <stdint.h>
  
  #define STACK_CHK_GUARD \
    ({ uintptr_t x; asm ("ear %0,%%a0; l %0,0x14(%0)" : "=a" (x)); x; })
  
  /* On s390/s390x there is no unique pointer guard, instead we use the
     same value as the stack guard.  */
  #define POINTER_CHK_GUARD \
    ({							\
       uintptr_t x;					\
       asm ("ear %0,%%a0; l %0,%1(%0)"			\
  	  : "=a" (x)					\
  	  : "i" (offsetof (tcbhead_t, stack_guard)));	\
       x;							\
     })
  