1 typedef struct mcontext mcontext_t;
2 typedef struct ucontext ucontext_t;
3 struct mcontext
4 {
5 	ulong	pc;		/* lr */
6 	ulong	cr;		/* mfcr */
7 	ulong	ctr;		/* mfcr */
8 	ulong	xer;		/* mfcr */
9 	ulong	sp;		/* callee saved: r1 */
10 	ulong	toc;		/* callee saved: r2 */
11 	ulong	r3;		/* first arg to function, return register: r3 */
12 	ulong	gpr[19];	/* callee saved: r13-r31 */
13 // XXX: currently do not save vector registers or floating-point state
14 //	ulong	pad;
15 //	uvlong	fpr[18];	/* callee saved: f14-f31 */
16 //	ulong	vr[4*12];	/* callee saved: v20-v31, 256-bits each */
17 };
18 
19 struct ucontext
20 {
21 	struct {
22 		void *ss_sp;
23 		uint ss_size;
24 	} uc_stack;
25 	sigset_t uc_sigmask;
26 	mcontext_t mc;
27 };
28 
29 void makecontext(ucontext_t*, void(*)(void), int, ...);
30 int getcontext(ucontext_t*);
31 int setcontext(ucontext_t*);
32 int swapcontext(ucontext_t*, ucontext_t*);
33 int _getmcontext(mcontext_t*);
34 void _setmcontext(mcontext_t*);
35