sysdeps/s390/s390-64/stackguard-macros.h

   1 #include <stdint.h>
   2
   3 #define STACK_CHK_GUARD \
   4   ({ uintptr_t x; asm ("ear %0,%%a0; sllg %0,%0,32; ear %0,%%a1; lg %0,0x28(%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;"                                \
  12           "sllg %0,%0,32;"                              \
  13           "ear %0,%%a1;"                                \
  14           "lg %0,%1(%0)"                                \
  15          : "=a" (x)                                     \
  16          : "i" (offsetof (tcbhead_t, stack_guard)));    \
  17      x;                                                 \
  18    })