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#define setcontext(u) _setmcontext(&(u)->mc)
#define getcontext(u) _getmcontext(&(u)->mc)
typedef struct mcontext mcontext_t;
typedef struct ucontext ucontext_t;
struct mcontext
{
ulong pc; /* lr */
ulong cr; /* mfcr */
ulong ctr; /* mfcr */
ulong xer; /* mfcr */
ulong sp; /* callee saved: r1 */
ulong toc; /* callee saved: r2 */
ulong r3; /* first arg to function, return register: r3 */
ulong gpr[19]; /* callee saved: r13-r31 */
/*
// XXX: currently do not save vector registers or floating-point state
// ulong pad;
// uvlong fpr[18]; / * callee saved: f14-f31 * /
// ulong vr[4*12]; / * callee saved: v20-v31, 256-bits each * /
*/
};
struct ucontext
{
struct {
void *ss_sp;
uint ss_size;
} uc_stack;
sigset_t uc_sigmask;
mcontext_t mc;
};
void makecontext(ucontext_t*, void(*)(void), int, ...);
int swapcontext(ucontext_t*, ucontext_t*);
int _getmcontext(mcontext_t*);
void _setmcontext(mcontext_t*);
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