1 /* $NetBSD: linux_sig_notalpha.c,v 1.36 2007/12/20 23:02:56 dsl 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_sig_notalpha.c,v 1.36 2007/12/20 23:02:56 dsl 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 #include <compat/linux/common/linux_ipc.h> 61 #include <compat/linux/common/linux_sem.h> 62 63 #include <compat/linux/linux_syscallargs.h> 64 65 /* Used on: arm, i386, m68k, mips, sparc, sparc64 */ 66 /* Not used on: alpha */ 67 68 #if !defined(__amd64__) 69 /* 70 * The Linux signal() system call. I think that the signal() in the C 71 * library actually calls sigaction, so I doubt this one is ever used. 72 * But hey, it can't hurt having it here. The same restrictions as for 73 * sigaction() apply. 74 */ 75 int 76 linux_sys_signal(struct lwp *l, const struct linux_sys_signal_args *uap, register_t *retval) 77 { 78 /* { 79 syscallarg(int) signum; 80 syscallarg(linux_handler_t) handler; 81 } */ 82 struct sigaction nbsa, obsa; 83 int error, sig; 84 85 *retval = -1; 86 sig = SCARG(uap, signum); 87 if (sig < 0 || sig >= LINUX__NSIG) 88 return (EINVAL); 89 90 nbsa.sa_handler = SCARG(uap, handler); 91 sigemptyset(&nbsa.sa_mask); 92 nbsa.sa_flags = SA_RESETHAND | SA_NODEFER; 93 error = sigaction1(l, linux_to_native_signo[sig], 94 &nbsa, &obsa, NULL, 0); 95 if (error == 0) 96 *retval = (int)(long)obsa.sa_handler; /* XXXmanu cast */ 97 return (error); 98 } 99 100 101 /* ARGSUSED */ 102 int 103 linux_sys_siggetmask(struct lwp *l, const void *v, register_t *retval) 104 { 105 struct proc *p = l->l_proc; 106 sigset_t bss; 107 linux_old_sigset_t lss; 108 int error; 109 110 mutex_enter(&p->p_smutex); 111 error = sigprocmask1(l, SIG_SETMASK, 0, &bss); 112 mutex_exit(&p->p_smutex); 113 if (error) 114 return (error); 115 native_to_linux_old_sigset(&lss, &bss); 116 return (0); 117 } 118 119 /* 120 * The following three functions fiddle with a process' signal mask. 121 * Convert the signal masks because of the different signal 122 * values for Linux. The need for this is the reason why 123 * they are here, and have not been mapped directly. 124 */ 125 int 126 linux_sys_sigsetmask(struct lwp *l, const struct linux_sys_sigsetmask_args *uap, register_t *retval) 127 { 128 /* { 129 syscallarg(linux_old_sigset_t) mask; 130 } */ 131 sigset_t nbss, obss; 132 linux_old_sigset_t nlss, olss; 133 struct proc *p = l->l_proc; 134 int error; 135 136 nlss = SCARG(uap, mask); 137 linux_old_to_native_sigset(&nbss, &nlss); 138 mutex_enter(&p->p_smutex); 139 error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss); 140 mutex_exit(&p->p_smutex); 141 if (error) 142 return (error); 143 native_to_linux_old_sigset(&olss, &obss); 144 *retval = olss; 145 return (0); 146 } 147 148 int 149 linux_sys_sigprocmask(struct lwp *l, const struct linux_sys_sigprocmask_args *uap, register_t *retval) 150 { 151 /* { 152 syscallarg(int) how; 153 syscallarg(const linux_old_sigset_t *) set; 154 syscallarg(linux_old_sigset_t *) oset; 155 } */ 156 157 return(linux_sigprocmask1(l, SCARG(uap, how), 158 SCARG(uap, set), SCARG(uap, oset))); 159 } 160 #endif /* !__amd64__ */ 161 162 /* 163 * The deprecated pause(2), which is really just an instance 164 * of sigsuspend(2). 165 */ 166 int 167 linux_sys_pause(struct lwp *l, const void *v, register_t *retval) 168 { 169 170 return (sigsuspend1(l, 0)); 171 } 172 173