1 #include <stdint.h>
2 
3 #define STACK_CHK_GUARD \
4   ({ uintptr_t x; asm ("lwz %0,-28680(2)" : "=r" (x)); x; })
5 
6 #define POINTER_CHK_GUARD \
7   ({												\
8      uintptr_t x;										\
9      asm ("lwz %0,%1(2)"									\
10 	  : "=r" (x)										\
11 	  : "i" (offsetof (tcbhead_t, pointer_guard) - TLS_TCB_OFFSET - sizeof (tcbhead_t))	\
12          );											\
13      x;												\
14    })
15