diff options
| author |   kettenis <kettenis@openbsd.org> | 2017-03-18 23:41:24 +0000 |
|---|---|---|
| committer | kettenis <kettenis@openbsd.org> | 2017-03-18 23:41:24 +0000 |
| commit | a013678b60c3783447fc07b88fc9e122607c33f5 (patch) | |
| tree | 1022eb4fa87d048d2ccc372c2394cc1662492a56 /lib/libc | |
| parent | switch to _slaacd user now that we have it (diff) | |
| download | wireguard-openbsd-a013678b60c3783447fc07b88fc9e122607c33f5.tar.xz wireguard-openbsd-a013678b60c3783447fc07b88fc9e122607c33f5.zip | |
Simplify fork/vfork logic: the kernel has handled returning zero in the child
for a long time, so there's no need to test the second return register here
in the asm stub.
ok guenther@
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/arch/aarch64/sys/Ovfork.S | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/lib/libc/arch/aarch64/sys/Ovfork.S b/lib/libc/arch/aarch64/sys/Ovfork.S index daf30211c56..cac2dff352c 100644 --- a/lib/libc/arch/aarch64/sys/Ovfork.S +++ b/lib/libc/arch/aarch64/sys/Ovfork.S @@ -1,4 +1,4 @@ -/* $OpenBSD: Ovfork.S,v 1.1 2017/01/11 18:09:24 patrick Exp $ */ +/* $OpenBSD: Ovfork.S,v 1.2 2017/03/18 23:41:24 kettenis Exp $ */ /* $NetBSD: Ovfork.S,v 1.6 2003/08/07 16:42:03 agc Exp $ */ /*- @@ -34,13 +34,6 @@ #include "SYS.h" -/* - * pid = vfork(); - * - * On return from the SWI: - * r1 == 0 in parent process, r1 == 1 in child process. - * r0 == pid of child in parent, r0 == pid of parent in child. - */ .text .align 0 @@ -48,8 +41,6 @@ SYSENTRY_HIDDEN(vfork) mov x2, x30 SYSTRAP(vfork) bcs CERROR - sub x1, x1, #1 /* r1 == 0xffffffff if parent, 0 if child */ - and x0, x0, x1 /* r0 == 0 if child, else unchanged */ mov x30, x2 ret SYSCALL_END_HIDDEN(vfork) |