1 /* $NetBSD: __sigaction14_sigtramp.c,v 1.7 2008/04/28 20:22:57 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: __sigaction14_sigtramp.c,v 1.7 2008/04/28 20:22:57 martin Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #include <sys/types.h> 38 #include <signal.h> 39 #include <errno.h> 40 41 #include "extern.h" 42 43 __weak_alias(__sigaction14, __libc_sigaction14) 44 45 int 46 __libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact) 47 { 48 extern void __sigtramp_siginfo_2(void); 49 50 #ifdef __LIBC12_SOURCE__ 51 /* 52 * We select the compatibility SIGCONTEXT trampoline if SA_SIGINFO 53 * is not set in the sigaction. 54 */ 55 if (act && (act->sa_flags & SA_SIGINFO) == 0) { 56 extern void __sigtramp_sigcontext_1(void); 57 int sav = errno; 58 int rv = __sigaction_sigtramp(sig, act, oact, 59 __sigtramp_sigcontext_1, 1); 60 /* 61 * EINVAL might indicate that trampoline version 1 is 62 * not supported by the kernel; fall back on native 63 * SIGINFO trampoline. 64 */ 65 if (rv >= 0 || errno != EINVAL) 66 return rv; 67 errno = sav; 68 } 69 #endif 70 71 return __sigaction_sigtramp(sig, act, oact, __sigtramp_siginfo_2, 2); 72 } 73