diff options
author | Russ Cox <rsc@swtch.com> | 2020-01-19 22:39:22 -0500 |
---|---|---|
committer | Russ Cox <rsc@swtch.com> | 2020-01-19 23:04:58 -0500 |
commit | 41b3e8b9893a8561af7e85ca98444bc284b4013d (patch) | |
tree | e9bf7fdeefbdb7d2e6c1ebc25c7888b81f0bb16b /src/libthread/OpenBSD-x86_64.c | |
parent | ac8042dfa9819f76ccfedd4aa36c1239322808b8 (diff) | |
download | plan9port-41b3e8b9893a8561af7e85ca98444bc284b4013d.tar.gz plan9port-41b3e8b9893a8561af7e85ca98444bc284b4013d.tar.bz2 plan9port-41b3e8b9893a8561af7e85ca98444bc284b4013d.zip |
libthread: use consistent stack calculation code in makecontext
Also reduce duplication: makecontext is per-arch not per-os-arch.
May fix #353.
Diffstat (limited to 'src/libthread/OpenBSD-x86_64.c')
-rw-r--r-- | src/libthread/OpenBSD-x86_64.c | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/src/libthread/OpenBSD-x86_64.c b/src/libthread/OpenBSD-x86_64.c deleted file mode 100644 index 27931456..00000000 --- a/src/libthread/OpenBSD-x86_64.c +++ /dev/null @@ -1,30 +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); - *--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; -} |