1 20f5692b 2012-07-14 rsc #include "threadimpl.h"
4 20f5692b 2012-07-14 rsc makecontext(ucontext_t *uc, void (*fn)(void), int argc, ...)
9 20f5692b 2012-07-14 rsc //fprint(2, "makecontext %d\n", argc);
10 20f5692b 2012-07-14 rsc if(argc != 2)
11 20f5692b 2012-07-14 rsc sysfatal("libthread: makecontext misused");
12 20f5692b 2012-07-14 rsc va_start(arg, argc);
13 20f5692b 2012-07-14 rsc uc->mc.di = va_arg(arg, uint);
14 20f5692b 2012-07-14 rsc uc->mc.si = va_arg(arg, uint);
15 20f5692b 2012-07-14 rsc //fprint(2, "%ux %ux\n", uc->mc.di, uc->mc.si);
18 20f5692b 2012-07-14 rsc sp = (uintptr*)((char*)uc->uc_stack.ss_sp+uc->uc_stack.ss_size);
19 20f5692b 2012-07-14 rsc *--sp = 0; // fn's return address
20 20f5692b 2012-07-14 rsc *--sp = (uintptr)fn; // return address of setcontext
21 20f5692b 2012-07-14 rsc uc->mc.sp = (uintptr)sp;
25 20f5692b 2012-07-14 rsc swapcontext(ucontext_t *oucp, ucontext_t *ucp)
27 20f5692b 2012-07-14 rsc if(getcontext(oucp) == 0)
28 20f5692b 2012-07-14 rsc setcontext(ucp);