__returns_twice
int _setjmp(jmp_buf) __returns_twice;
int setjmp(jmp_buf) __returns_twice;
int sigsetjmp(sigjmp_buf, int) __returns_twice;
pid_t vfork(void) __returns_twice;
pid_t rfork(int) __returns_twice;
int savectx(struct pcb *) __returns_twice;
void savectx(struct pcb *) __returns_twice;
void savectx(struct pcb *pcb) __returns_twice;
int savectx(struct pcb *) __returns_twice;
void savectx(struct pcb *) __returns_twice;
int savectx(struct pcb *pcb) __returns_twice;
int setjmp(struct _jmp_buf *) __returns_twice;
int getcontext(ucontext_t *) __returns_twice;
int __fillcontextx(char *ctx) __returns_twice;