1 #define	setcontext(u)	_setmcontext(&(u)->mc)
2 #define	getcontext(u)	_getmcontext(&(u)->mc)
3 typedef struct mcontext mcontext_t;
4 typedef struct ucontext ucontext_t;
5 struct mcontext
6 {
7 	int	r[16];
8 };
9 
10 struct ucontext
11 {
12 	struct {
13 		void *ss_sp;
14 		uint ss_size;
15 	} uc_stack;
16 	sigset_t uc_sigmask;
17 	mcontext_t mc;
18 };
19 
20 void makecontext(ucontext_t*, void(*)(void), int, ...);
21 int swapcontext(ucontext_t*, ucontext_t*);
22 int _getmcontext(mcontext_t*);
23 void _setmcontext(mcontext_t*);
24