linux_sigaction.c revision 1.30
1/* $NetBSD: linux_sigaction.c,v 1.30 2007/02/09 21:55:19 ad Exp $ */ 2 3/*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp 41 */ 42 43#include <sys/cdefs.h> 44__KERNEL_RCSID(0, "$NetBSD: linux_sigaction.c,v 1.30 2007/02/09 21:55:19 ad Exp $"); 45 46#include <sys/param.h> 47#include <sys/systm.h> 48#include <sys/proc.h> 49#include <sys/filedesc.h> 50#include <sys/mount.h> 51#include <sys/kernel.h> 52#include <sys/signal.h> 53#include <sys/signalvar.h> 54 55#include <sys/syscallargs.h> 56 57#include <compat/linux/common/linux_types.h> 58#include <compat/linux/common/linux_signal.h> 59#include <compat/linux/common/linux_util.h> 60 61#include <compat/linux/linux_syscallargs.h> 62 63/* Used on: alpha (aka osf_sigaction), arm, i386, m68k, mips, ppc */ 64/* Not used on: sparc, sparc64, amd64 */ 65 66#ifndef __amd64__ 67/* 68 * The Linux sigaction() system call. Do the usual conversions, 69 * and just call sigaction(). 70 */ 71int 72linux_sys_sigaction(struct lwp *l, void *v, register_t *retval) 73{ 74 struct linux_sys_sigaction_args /* { 75 syscallarg(int) signum; 76 syscallarg(const struct linux_old_sigaction *) nsa; 77 syscallarg(struct linux_old_sigaction *) osa; 78 } */ *uap = v; 79 struct linux_old_sigaction nlsa, olsa; 80 struct sigaction nbsa, obsa; 81 int error, sig; 82 83 /* XXX XAX handle switch to RT signal handler */ 84 /* XXX XAX and update emuldata->ps_siginfo. */ 85 86 if (SCARG(uap, nsa)) { 87 error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa)); 88 if (error) 89 return (error); 90 linux_old_to_native_sigaction(&nbsa, &nlsa); 91 } 92 sig = SCARG(uap, signum); 93 if (sig < 0 || sig >= LINUX__NSIG) 94 return (EINVAL); 95 if (sig > 0 && !linux_to_native_signo[sig]) { 96 /* Pretend that we did something useful for unknown signals. */ 97 obsa.sa_handler = SIG_IGN; 98 sigemptyset(&obsa.sa_mask); 99 obsa.sa_flags = 0; 100 } else { 101 error = sigaction1(l, linux_to_native_signo[sig], 102 SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0, 103 NULL, 0); 104 if (error) 105 return (error); 106 } 107 if (SCARG(uap, osa)) { 108 native_to_linux_old_sigaction(&olsa, &obsa); 109 error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa)); 110 if (error) 111 return (error); 112 } 113 return (0); 114} 115#endif /* !amd64 */ 116