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Look at _UC_STACK to decide whether the process' SS_ONSTACK state needs to 

be updated.  (This is needed to be compatible with how pre-SIGINFO signals
operated.  If you siglongjmp out of a signal handler, the SS_ONSTACK state
needs to be cleared.  This commit restores that functionality).
This commit is contained in:
matt 2004-03-04 00:05:58 +00:00
parent 71f2db14c8
commit 1b4f540b78
1 changed files with 14 additions and 6 deletions
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20
sys/kern/kern_sig.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kern_sig.c,v 1.184 2003/12/24 22:53:59 manu Exp $ */
/* $NetBSD: kern_sig.c,v 1.185 2004/03/04 00:05:58 matt Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1991, 1993
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.184 2003/12/24 22:53:59 manu Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.185 2004/03/04 00:05:58 matt Exp $");
#include "opt_ktrace.h"
#include "opt_compat_sunos.h"
@ -2166,13 +2166,21 @@ setucontext(struct lwp *l, const ucontext_t *ucp)
if ((error = cpu_setmcontext(l, &ucp->uc_mcontext, ucp->uc_flags)) != 0)
return (error);
l->l_ctxlink = ucp->uc_link;
/*
* We might want to take care of the stack portion here but currently
* don't; see the comment in getucontext().
*/
if ((ucp->uc_flags & _UC_SIGMASK) != 0)
sigprocmask1(p, SIG_SETMASK, &ucp->uc_sigmask, NULL);
/*
* If there was stack information, update whether or not we are
* still running on an alternate signal stack.
*/
if ((ucp->uc_flags & _UC_STACK) != 0) {
if (ucp->uc_stack.ss_flags & SS_ONSTACK)
p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
else
p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK;
}
return 0;
}