1*2fe8fb19SBen Gras /* $NetBSD: __sigaction14_sigtramp.c,v 1.8 2008/04/28 20:22:57 martin Exp $ */
2*2fe8fb19SBen Gras
3*2fe8fb19SBen Gras /*-
4*2fe8fb19SBen Gras * Copyright (c) 2003 The NetBSD Foundation, Inc.
5*2fe8fb19SBen Gras * All rights reserved.
6*2fe8fb19SBen Gras *
7*2fe8fb19SBen Gras * This code is derived from software contributed to The NetBSD Foundation
8*2fe8fb19SBen Gras * by Jason R. Thorpe.
9*2fe8fb19SBen Gras *
10*2fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without
11*2fe8fb19SBen Gras * modification, are permitted provided that the following conditions
12*2fe8fb19SBen Gras * are met:
13*2fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright
14*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer.
15*2fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright
16*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the
17*2fe8fb19SBen Gras * documentation and/or other materials provided with the distribution.
18*2fe8fb19SBen Gras *
19*2fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*2fe8fb19SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*2fe8fb19SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*2fe8fb19SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*2fe8fb19SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*2fe8fb19SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*2fe8fb19SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*2fe8fb19SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*2fe8fb19SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*2fe8fb19SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*2fe8fb19SBen Gras * POSSIBILITY OF SUCH DAMAGE.
30*2fe8fb19SBen Gras */
31*2fe8fb19SBen Gras
32*2fe8fb19SBen Gras #include <sys/cdefs.h>
33*2fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
34*2fe8fb19SBen Gras __RCSID("$NetBSD: __sigaction14_sigtramp.c,v 1.8 2008/04/28 20:22:57 martin Exp $");
35*2fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */
36*2fe8fb19SBen Gras
37*2fe8fb19SBen Gras #include <sys/types.h>
38*2fe8fb19SBen Gras #include <signal.h>
39*2fe8fb19SBen Gras #include <errno.h>
40*2fe8fb19SBen Gras
41*2fe8fb19SBen Gras #include "extern.h"
42*2fe8fb19SBen Gras
43*2fe8fb19SBen Gras __weak_alias(__sigaction14, __libc_sigaction14)
44*2fe8fb19SBen Gras #ifdef __LIBC12_SOURCE__
45*2fe8fb19SBen Gras extern const int __sigtramp_sigcontext_1[]
46*2fe8fb19SBen Gras __weak_reference(__sigtramp_sigcontext_1);
47*2fe8fb19SBen Gras #endif
48*2fe8fb19SBen Gras
49*2fe8fb19SBen Gras int
__libc_sigaction14(int sig,const struct sigaction * act,struct sigaction * oact)50*2fe8fb19SBen Gras __libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
51*2fe8fb19SBen Gras {
52*2fe8fb19SBen Gras extern int __sigtramp_siginfo_2[];
53*2fe8fb19SBen Gras
54*2fe8fb19SBen Gras #ifdef __LIBC12_SOURCE__
55*2fe8fb19SBen Gras /*
56*2fe8fb19SBen Gras * We select the compatibility SIGCONTEXT trampoline if SA_SIGINFO
57*2fe8fb19SBen Gras * is not set in the sigaction.
58*2fe8fb19SBen Gras */
59*2fe8fb19SBen Gras if (act && (act->sa_flags & SA_SIGINFO) == 0) {
60*2fe8fb19SBen Gras extern int __sigtramp_sigcontext_1[];
61*2fe8fb19SBen Gras int sav = errno;
62*2fe8fb19SBen Gras int rv = __sigaction_sigtramp(sig, act, oact,
63*2fe8fb19SBen Gras __sigtramp_sigcontext_1, 1);
64*2fe8fb19SBen Gras /*
65*2fe8fb19SBen Gras * EINVAL might indicate that trampoline version 1 is
66*2fe8fb19SBen Gras * not supported by the kernel; fall back on native
67*2fe8fb19SBen Gras * SIGINFO trampoline.
68*2fe8fb19SBen Gras */
69*2fe8fb19SBen Gras if (rv >= 0 || errno != EINVAL)
70*2fe8fb19SBen Gras return rv;
71*2fe8fb19SBen Gras errno = sav;
72*2fe8fb19SBen Gras }
73*2fe8fb19SBen Gras #endif
74*2fe8fb19SBen Gras
75*2fe8fb19SBen Gras return __sigaction_sigtramp(sig, act, oact, __sigtramp_siginfo_2, 2);
76*2fe8fb19SBen Gras }
77