linux_sig_notalpha.c revision 1.39
1 /* $NetBSD: linux_sig_notalpha.c,v 1.39 2009/06/02 16:53:07 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_sig_notalpha.c,v 1.39 2009/06/02 16:53:07 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: arm, i386, m68k, mips, sparc, sparc64 */ 59 /* Not used on: alpha */ 60 61 #if !defined(__amd64__) 62 /* 63 * The Linux signal() system call. I think that the signal() in the C 64 * library actually calls sigaction, so I doubt this one is ever used. 65 * But hey, it can't hurt having it here. The same restrictions as for 66 * sigaction() apply. 67 */ 68 int 69 linux_sys_signal(struct lwp *l, const struct linux_sys_signal_args *uap, register_t *retval) 70 { 71 /* { 72 syscallarg(int) signum; 73 syscallarg(linux_handler_t) handler; 74 } */ 75 struct sigaction nbsa, obsa; 76 int error, sig; 77 78 *retval = -1; 79 sig = SCARG(uap, signum); 80 if (sig < 0 || sig >= LINUX__NSIG) 81 return (EINVAL); 82 83 nbsa.sa_handler = SCARG(uap, handler); 84 sigemptyset(&nbsa.sa_mask); 85 nbsa.sa_flags = SA_RESETHAND | SA_NODEFER; 86 error = sigaction1(l, linux_to_native_signo[sig], 87 &nbsa, &obsa, NULL, 0); 88 if (error == 0) 89 *retval = (int)(long)obsa.sa_handler; /* XXXmanu cast */ 90 return (error); 91 } 92 93 94 /* ARGSUSED */ 95 int 96 linux_sys_siggetmask(struct lwp *l, const void *v, register_t *retval) 97 { 98 struct proc *p = l->l_proc; 99 sigset_t bss; 100 linux_old_sigset_t lss; 101 int error; 102 103 mutex_enter(p->p_lock); 104 error = sigprocmask1(l, SIG_SETMASK, 0, &bss); 105 mutex_exit(p->p_lock); 106 if (error) 107 return (error); 108 native_to_linux_old_sigset(&lss, &bss); 109 *retval = lss; 110 return (0); 111 } 112 113 /* 114 * The following three functions fiddle with a process' signal mask. 115 * Convert the signal masks because of the different signal 116 * values for Linux. The need for this is the reason why 117 * they are here, and have not been mapped directly. 118 */ 119 int 120 linux_sys_sigsetmask(struct lwp *l, const struct linux_sys_sigsetmask_args *uap, register_t *retval) 121 { 122 /* { 123 syscallarg(linux_old_sigset_t) mask; 124 } */ 125 sigset_t nbss, obss; 126 linux_old_sigset_t nlss, olss; 127 struct proc *p = l->l_proc; 128 int error; 129 130 nlss = SCARG(uap, mask); 131 linux_old_to_native_sigset(&nbss, &nlss); 132 mutex_enter(p->p_lock); 133 error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss); 134 mutex_exit(p->p_lock); 135 if (error) 136 return (error); 137 native_to_linux_old_sigset(&olss, &obss); 138 *retval = olss; 139 return (0); 140 } 141 142 int 143 linux_sys_sigprocmask(struct lwp *l, const struct linux_sys_sigprocmask_args *uap, register_t *retval) 144 { 145 /* { 146 syscallarg(int) how; 147 syscallarg(const linux_old_sigset_t *) set; 148 syscallarg(linux_old_sigset_t *) oset; 149 } */ 150 151 return(linux_sigprocmask1(l, SCARG(uap, how), 152 SCARG(uap, set), SCARG(uap, oset))); 153 } 154 #endif /* !__amd64__ */ 155 156 /* 157 * The deprecated pause(2), which is really just an instance 158 * of sigsuspend(2). 159 */ 160 int 161 linux_sys_pause(struct lwp *l, const void *v, register_t *retval) 162 { 163 164 return (sigsuspend1(l, 0)); 165 } 166 167
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