1 41b3e8b9 2020-01-20 rsc #include "threadimpl.h"
 2 41b3e8b9 2020-01-20 rsc 
 3 41b3e8b9 2020-01-20 rsc void
 4 41b3e8b9 2020-01-20 rsc makecontext(ucontext_t *uc, void (*fn)(void), int argc, ...)
 5 41b3e8b9 2020-01-20 rsc {
 6 41b3e8b9 2020-01-20 rsc 	int i, *sp;
 7 41b3e8b9 2020-01-20 rsc 	va_list arg;
 8 41b3e8b9 2020-01-20 rsc 
 9 41b3e8b9 2020-01-20 rsc 	sp = USPALIGN(uc, 4);
10 41b3e8b9 2020-01-20 rsc 	va_start(arg, argc);
11 41b3e8b9 2020-01-20 rsc 	for(i=0; i<4 && i<argc; i++)
12 41b3e8b9 2020-01-20 rsc 		(&uc->uc_mcontext.arm_r0)[i] = va_arg(arg, uint);
13 41b3e8b9 2020-01-20 rsc 	va_end(arg);
14 41b3e8b9 2020-01-20 rsc 	uc->uc_mcontext.arm_sp = (uint)sp;
15 41b3e8b9 2020-01-20 rsc 	uc->uc_mcontext.arm_lr = (uint)fn;
16 41b3e8b9 2020-01-20 rsc }
17 41b3e8b9 2020-01-20 rsc 
18 41b3e8b9 2020-01-20 rsc int
19 41b3e8b9 2020-01-20 rsc swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
20 41b3e8b9 2020-01-20 rsc {
21 41b3e8b9 2020-01-20 rsc 	if(getcontext(oucp) == 0)
22 41b3e8b9 2020-01-20 rsc 		setcontext(ucp);
23 41b3e8b9 2020-01-20 rsc 	return 0;
24 41b3e8b9 2020-01-20 rsc }