1 /* $NetBSD: linux_sigaction.c,v 1.34 2008/10/17 20:21:34 njoly 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 * 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 /* 33 * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: linux_sigaction.c,v 1.34 2008/10/17 20:21:34 njoly Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/proc.h> 42 #include <sys/filedesc.h> 43 #include <sys/mount.h> 44 #include <sys/kernel.h> 45 #include <sys/signal.h> 46 #include <sys/signalvar.h> 47 48 #include <sys/syscallargs.h> 49 50 #include <compat/linux/common/linux_types.h> 51 #include <compat/linux/common/linux_signal.h> 52 #include <compat/linux/common/linux_util.h> 53 #include <compat/linux/common/linux_ipc.h> 54 #include <compat/linux/common/linux_sem.h> 55 56 #include <compat/linux/linux_syscallargs.h> 57 58 /* Used on: alpha (aka osf_sigaction), arm, i386, m68k, mips, ppc */ 59 /* Not used on: sparc, sparc64, amd64 */ 60 61 /* 62 * The Linux sigaction() system call. Do the usual conversions, 63 * and just call sigaction(). 64 */ 65 int 66 linux_sys_sigaction(struct lwp *l, const struct linux_sys_sigaction_args *uap, register_t *retval) 67 { 68 /* { 69 syscallarg(int) signum; 70 syscallarg(const struct linux_old_sigaction *) nsa; 71 syscallarg(struct linux_old_sigaction *) osa; 72 } */ 73 struct linux_old_sigaction nlsa, olsa; 74 struct sigaction nbsa, obsa; 75 int error, sig; 76 77 /* XXX XAX handle switch to RT signal handler */ 78 /* XXX XAX and update emuldata->ps_siginfo. */ 79 80 if (SCARG(uap, nsa)) { 81 error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa)); 82 if (error) 83 return (error); 84 linux_old_to_native_sigaction(&nbsa, &nlsa); 85 } 86 sig = SCARG(uap, signum); 87 if (sig < 0 || sig >= LINUX__NSIG) 88 return (EINVAL); 89 if (sig > 0 && !linux_to_native_signo[sig]) { 90 /* Pretend that we did something useful for unknown signals. */ 91 obsa.sa_handler = SIG_IGN; 92 sigemptyset(&obsa.sa_mask); 93 obsa.sa_flags = 0; 94 } else { 95 error = sigaction1(l, linux_to_native_signo[sig], 96 SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0, 97 NULL, 0); 98 if (error) 99 return (error); 100 } 101 if (SCARG(uap, osa)) { 102 native_to_linux_old_sigaction(&olsa, &obsa); 103 error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa)); 104 if (error) 105 return (error); 106 } 107 return (0); 108 } 109