1 /* $NetBSD: linux_sigaction.c,v 1.24 2002/07/04 23:32:11 thorpej 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 1.24 2002/07/04 23:32:11 thorpej 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 */ 65 66 /* 67 * The Linux sigaction() system call. Do the usual conversions, 68 * and just call sigaction(). 69 */ 70 int 71 linux_sys_sigaction(p, v, retval) 72 struct proc *p; 73 void *v; 74 register_t *retval; 75 { 76 struct linux_sys_sigaction_args /* { 77 syscallarg(int) signum; 78 syscallarg(const struct linux_old_sigaction *) nsa; 79 syscallarg(struct linux_old_sigaction *) osa; 80 } */ *uap = v; 81 struct linux_old_sigaction nlsa, olsa; 82 struct sigaction nbsa, obsa; 83 int error, sig; 84 85 /* XXX XAX handle switch to RT signal handler */ 86 /* XXX XAX and update emuldata->ps_siginfo. */ 87 88 if (SCARG(uap, nsa)) { 89 error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa)); 90 if (error) 91 return (error); 92 linux_old_to_native_sigaction(&nbsa, &nlsa); 93 } 94 sig = SCARG(uap, signum); 95 if (sig < 0 || sig >= LINUX__NSIG) 96 return (EINVAL); 97 if (sig > 0 && !linux_to_native_signo[sig]) { 98 /* Pretend that we did something useful for unknown signals. */ 99 obsa.sa_handler = SIG_IGN; 100 sigemptyset(&obsa.sa_mask); 101 obsa.sa_flags = 0; 102 } else { 103 error = sigaction1(p, linux_to_native_signo[sig], 104 SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0, 105 NULL, 0); 106 if (error) 107 return (error); 108 } 109 if (SCARG(uap, osa)) { 110 native_to_linux_old_sigaction(&olsa, &obsa); 111 error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa)); 112 if (error) 113 return (error); 114 } 115 return (0); 116 } 117