diff options
Diffstat (limited to 'src/libthread/Darwin-x86_64-swapcontext.c')
-rw-r--r-- | src/libthread/Darwin-x86_64-swapcontext.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/src/libthread/Darwin-x86_64-swapcontext.c b/src/libthread/Darwin-x86_64-swapcontext.c deleted file mode 100644 index c29ddb5e..00000000 --- a/src/libthread/Darwin-x86_64-swapcontext.c +++ /dev/null @@ -1,38 +0,0 @@ -#include "threadimpl.h" - -void -makecontext(ucontext_t *uc, void (*fn)(void), int argc, ...) -{ - uintptr *sp; - va_list arg; - -//fprint(2, "makecontext %d\n", argc); - if(argc != 2) - sysfatal("libthread: makecontext misused"); - va_start(arg, argc); - uc->mc.di = va_arg(arg, uint); - uc->mc.si = va_arg(arg, uint); -//fprint(2, "%ux %ux\n", uc->mc.di, uc->mc.si); - va_end(arg); - - sp = (uintptr*)((char*)uc->uc_stack.ss_sp+uc->uc_stack.ss_size); - /* - * Stack pointer at call instruction (before return address - * gets pushed) must be 16-byte aligned. - */ - if((uintptr)sp%4) - abort(); - while((uintptr)sp%16 != 0) - sp--; - *--sp = 0; // fn's return address - *--sp = (uintptr)fn; // return address of setcontext - uc->mc.sp = (uintptr)sp; -} - -int -swapcontext(ucontext_t *oucp, ucontext_t *ucp) -{ - if(getcontext(oucp) == 0) - setcontext(ucp); - return 0; -} |