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