minix/lib/nbsd_libc/arch/sparc/sys/__sigaction14_sigtramp.c

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/* $NetBSD: __sigaction14_sigtramp.c,v 1.7 2008/04/28 20:22:57 martin Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: __sigaction14_sigtramp.c,v 1.7 2008/04/28 20:22:57 martin Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#include "extern.h"
__weak_alias(__sigaction14, __libc_sigaction14)
int
__libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
{
extern void __sigtramp_siginfo_2(void);
#ifdef __LIBC12_SOURCE__
/*
* We select the compatibility SIGCONTEXT trampoline if SA_SIGINFO
* is not set in the sigaction.
*/
if (act && (act->sa_flags & SA_SIGINFO) == 0) {
extern void __sigtramp_sigcontext_1(void);
int sav = errno;
int rv = __sigaction_sigtramp(sig, act, oact,
__sigtramp_sigcontext_1, 1);
/*
* EINVAL might indicate that trampoline version 1 is
* not supported by the kernel; fall back on native
* SIGINFO trampoline.
*/
if (rv >= 0 || errno != EINVAL)
return rv;
errno = sav;
}
#endif
return __sigaction_sigtramp(sig, act, oact, __sigtramp_siginfo_2, 2);
}