Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pthread__deliver_signal: swap oldmask and siginfo so that signal 

handler's stack doesn't stomp siginfo.
this also fixes !__HAVE_SIGINFO, in that case
pthread__signal_tramp assumes uc->uc_stack.ss_sp points the old
signal mask.

pointed by uwe@.
This commit is contained in:
yamt 2003-11-20 15:46:42 +00:00
parent e712db964a
commit d7b65981fb
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/libpthread/pthread_sig.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pthread_sig.c,v 1.24 2003/11/09 18:56:48 christos Exp $ */
/* $NetBSD: pthread_sig.c,v 1.25 2003/11/20 15:46:42 yamt Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: pthread_sig.c,v 1.24 2003/11/09 18:56:48 christos Exp $");
__RCSID("$NetBSD: pthread_sig.c,v 1.25 2003/11/20 15:46:42 yamt Exp $");
/* We're interposing a specific version of the signal interface. */
#define __LIBC12_SOURCE__
@ -867,18 +867,18 @@ pthread__deliver_signal(pthread_t self, pthread_t target, siginfo_t *si)
* handler. So we borrow a bit of space from the target's
* stack, which we were adjusting anyway.
*/
maskp = (sigset_t *)(void *)((char *)(void *)olduc -
STACKSPACE - sizeof(sigset_t));
*maskp = oldmask;
siginfop = (siginfo_t *)(void *)((char *)(void *)maskp -
siginfop = (siginfo_t *)(void *)((char *)(void *)olduc -
sizeof(*siginfop));
*siginfop = *si;
maskp = (sigset_t *)(void *)((char *)(void *)siginfop -
STACKSPACE - sizeof(sigset_t));
*maskp = oldmask;
/*
* XXX We are blatantly ignoring SIGALTSTACK. It would screw
* with our notion of stack->thread mappings.
*/
uc = (ucontext_t *)(void *)((char *)(void *)siginfop -
uc = (ucontext_t *)(void *)((char *)(void *)maskp -
sizeof(ucontext_t));
#ifdef _UC_UCONTEXT_ALIGN
uc = (ucontext_t *)((uintptr_t)uc & _UC_UCONTEXT_ALIGN);