diff options
Diffstat (limited to 'src/libthread/power-ucontext.c')
-rw-r--r-- | src/libthread/power-ucontext.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/libthread/power-ucontext.c b/src/libthread/power-ucontext.c new file mode 100644 index 00000000..32a8e931 --- /dev/null +++ b/src/libthread/power-ucontext.c @@ -0,0 +1,26 @@ +#include "threadimpl.h" + +void +makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...) +{ + ulong *sp, *tos; + va_list arg; + + if(argc != 2) + sysfatal("libthread: makecontext misused"); + sp = USPALIGN(ucp, 16); + ucp->mc.pc = (long)func; + ucp->mc.sp = (long)sp; + va_start(arg, argc); + ucp->mc.r3 = va_arg(arg, long); + ucp->mc.r4 = va_arg(arg, long); + va_end(arg); +} + +int +swapcontext(ucontext_t *oucp, ucontext_t *ucp) +{ + if(getcontext(oucp) == 0) + setcontext(ucp); + return 0; +} |