1  #include <stdint.h>
       2  
       3  extern uintptr_t __stack_chk_guard;
       4  #define STACK_CHK_GUARD __stack_chk_guard
       5  
       6  #ifdef PTRGUARD_LOCAL
       7  extern uintptr_t __pointer_chk_guard_local;
       8  # define POINTER_CHK_GUARD __pointer_chk_guard_local
       9  #else
      10  extern uintptr_t __pointer_chk_guard;
      11  # define POINTER_CHK_GUARD __pointer_chk_guard
      12  #endif