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/vax/sys/tfork_thread.S | |
| 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/vax/sys/tfork_thread.S')
| -rw-r--r-- | lib/libc/arch/vax/sys/tfork_thread.S | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/lib/libc/arch/vax/sys/tfork_thread.S b/lib/libc/arch/vax/sys/tfork_thread.S index 1d22f1e924b..123c4a83641 100644 --- a/lib/libc/arch/vax/sys/tfork_thread.S +++ b/lib/libc/arch/vax/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 @@ -28,15 +28,14 @@ #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, R2|R3|R4) +ENTRY(__tfork_thread, R2|R3) /* * Save thread creation arguments into registers. */ - movl 8(ap), r2 /* stack */ - movl 12(ap), r3 /* func */ - movl 16(ap), r4 /* arg */ + movl 12(ap), r2 /* func */ + movl 16(ap), r3 /* arg */ __DO_SYSCALL(__tfork) jcs 9f @@ -55,9 +54,8 @@ ENTRY(__tfork_thread, R2|R3|R4) * Note that since we can not pass a register to calls, we need * to waste 4 bytes of stack in every thread. */ - movl r2, sp /* stack */ - pushl r3 /* func */ - pushl r4 /* arg */ + pushl r2 /* func */ + pushl r3 /* arg */ calls $1, *4(sp) /* func */ __DO_SYSCALL(__threxit) |