diff options
| author |   guenther <guenther@openbsd.org> | 2012-06-21 00:56:59 +0000 |
|---|---|---|
| committer | guenther <guenther@openbsd.org> | 2012-06-21 00:56:59 +0000 |
| commit | 16b62b6a0b93be6a70f097edd49f4c661f85cd4f (patch) | |
| tree | b60ec958758bfe01ad491979d73feeea25c66228 /lib/libc/arch/sparc/sys | |
| parent | fix strlcpy truncation check. from carsten at debian org, ok markus (diff) | |
| download | wireguard-openbsd-16b62b6a0b93be6a70f097edd49f4c661f85cd4f.tar.xz wireguard-openbsd-16b62b6a0b93be6a70f097edd49f4c661f85cd4f.zip | |
__tfork() needs to set the stack address of the new thread in the kernel,
so that it can't get a signal while still running on the parent thread's
stack. Also, pass in sizeof(struct __tfork) to provide forward compat
when more members are added. This is an ABI change, so switch syscall
numbers and bump lib majors this time.
ok deraadt@ matthew@
Diffstat (limited to 'lib/libc/arch/sparc/sys')
| -rw-r--r-- | lib/libc/arch/sparc/sys/tfork_thread.S | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/lib/libc/arch/sparc/sys/tfork_thread.S b/lib/libc/arch/sparc/sys/tfork_thread.S index 882a07f7234..09bf0083810 100644 --- a/lib/libc/arch/sparc/sys/tfork_thread.S +++ b/lib/libc/arch/sparc/sys/tfork_thread.S @@ -1,4 +1,4 @@ -/* $OpenBSD: tfork_thread.S,v 1.1 2012/03/22 00:44:56 guenther Exp $ */ +/* $OpenBSD: tfork_thread.S,v 1.2 2012/06/21 00:56:59 guenther Exp $ */ /* * Copyright (c) 2005, Miodrag Vallat @@ -28,11 +28,9 @@ #include "SYS.h" /* - * int __tfork_thread(const struct __tfork *param, void *stack, void (*func)(void *), void *arg); + * int __tfork_thread(const struct __tfork *param, size_t psize, void (*func)(void *), void *arg); */ ENTRY(__tfork_thread) - mov %o1, %o4 /* save stack */ - /* * We can not invoke __tfork as a G2-style system call since we want * different return paths. @@ -54,12 +52,8 @@ ENTRY(__tfork_thread) 1: /* - * In child process: switch stack, invoke function, then exit. - * Don't forget to allocate room for a window save on the new - * stack! + * In child process: invoke function, then exit. */ - sub %g0, %g0, %fp - sub %o4, 96, %sp /* stack */ call %o2 /* func */ mov %o3, %o0 /* arg */ |