| 1 | /* $NetBSD: kern_sig_13.c,v 1.20 2011/01/19 10:21:16 tsutsui Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1998 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Charles M. Hannum. |
| 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 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: kern_sig_13.c,v 1.20 2011/01/19 10:21:16 tsutsui Exp $" ); |
| 34 | |
| 35 | #include <sys/param.h> |
| 36 | #include <sys/proc.h> |
| 37 | #include <sys/signal.h> |
| 38 | #include <sys/signalvar.h> |
| 39 | #include <sys/systm.h> |
| 40 | |
| 41 | #include <sys/syscallargs.h> |
| 42 | |
| 43 | #include <machine/limits.h> |
| 44 | |
| 45 | #include <compat/sys/signal.h> |
| 46 | #include <compat/sys/signalvar.h> |
| 47 | #include <compat/common/compat_util.h> |
| 48 | #include <compat/common/compat_sigaltstack.h> |
| 49 | |
| 50 | void |
| 51 | native_sigset13_to_sigset(const sigset13_t *oss, sigset_t *ss) |
| 52 | { |
| 53 | |
| 54 | ss->__bits[0] = *oss; |
| 55 | ss->__bits[1] = 0; |
| 56 | ss->__bits[2] = 0; |
| 57 | ss->__bits[3] = 0; |
| 58 | } |
| 59 | |
| 60 | void |
| 61 | native_sigset_to_sigset13(const sigset_t *ss, sigset13_t *oss) |
| 62 | { |
| 63 | |
| 64 | *oss = ss->__bits[0]; |
| 65 | } |
| 66 | |
| 67 | void |
| 68 | native_sigaction13_to_sigaction(const struct sigaction13 *osa, struct sigaction *sa) |
| 69 | { |
| 70 | |
| 71 | sa->sa_handler = osa->osa_handler; |
| 72 | native_sigset13_to_sigset(&osa->osa_mask, &sa->sa_mask); |
| 73 | sa->sa_flags = osa->osa_flags; |
| 74 | } |
| 75 | |
| 76 | void |
| 77 | native_sigaction_to_sigaction13(const struct sigaction *sa, struct sigaction13 *osa) |
| 78 | { |
| 79 | |
| 80 | osa->osa_handler = sa->sa_handler; |
| 81 | native_sigset_to_sigset13(&sa->sa_mask, &osa->osa_mask); |
| 82 | osa->osa_flags = sa->sa_flags; |
| 83 | } |
| 84 | |
| 85 | int |
| 86 | compat_13_sys_sigaltstack(struct lwp *l, const struct compat_13_sys_sigaltstack_args *uap, register_t *retval) |
| 87 | { |
| 88 | /* { |
| 89 | syscallarg(const struct sigaltstack13 *) nss; |
| 90 | syscallarg(struct sigaltstack13 *) oss; |
| 91 | } */ |
| 92 | compat_sigaltstack(uap, sigaltstack13, SS_ONSTACK, SS_DISABLE); |
| 93 | } |
| 94 | |
| 95 | int |
| 96 | compat_13_sys_sigaction(struct lwp *l, const struct compat_13_sys_sigaction_args *uap, register_t *retval) |
| 97 | { |
| 98 | /* { |
| 99 | syscallarg(int) signum; |
| 100 | syscallarg(const struct sigaction13 *) nsa; |
| 101 | syscallarg(struct sigaction13 *) osa; |
| 102 | } */ |
| 103 | struct sigaction13 nesa, oesa; |
| 104 | struct sigaction nbsa, obsa; |
| 105 | int error; |
| 106 | |
| 107 | if (SCARG(uap, nsa)) { |
| 108 | error = copyin(SCARG(uap, nsa), &nesa, sizeof(nesa)); |
| 109 | if (error) |
| 110 | return (error); |
| 111 | native_sigaction13_to_sigaction(&nesa, &nbsa); |
| 112 | } |
| 113 | error = sigaction1(l, SCARG(uap, signum), |
| 114 | SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0, |
| 115 | NULL, 0); |
| 116 | if (error) |
| 117 | return (error); |
| 118 | if (SCARG(uap, osa)) { |
| 119 | native_sigaction_to_sigaction13(&obsa, &oesa); |
| 120 | error = copyout(&oesa, SCARG(uap, osa), sizeof(oesa)); |
| 121 | if (error) |
| 122 | return (error); |
| 123 | } |
| 124 | return (0); |
| 125 | } |
| 126 | |
| 127 | int |
| 128 | compat_13_sys_sigprocmask(struct lwp *l, const struct compat_13_sys_sigprocmask_args *uap, register_t *retval) |
| 129 | { |
| 130 | /* { |
| 131 | syscallarg(int) how; |
| 132 | syscallarg(int) mask; |
| 133 | } */ |
| 134 | struct proc *p = l->l_proc; |
| 135 | sigset13_t ness, oess; |
| 136 | sigset_t nbss, obss; |
| 137 | int error; |
| 138 | |
| 139 | ness = SCARG(uap, mask); |
| 140 | native_sigset13_to_sigset(&ness, &nbss); |
| 141 | mutex_enter(p->p_lock); |
| 142 | error = sigprocmask1(l, SCARG(uap, how), &nbss, &obss); |
| 143 | mutex_exit(p->p_lock); |
| 144 | if (error) |
| 145 | return (error); |
| 146 | native_sigset_to_sigset13(&obss, &oess); |
| 147 | *retval = oess; |
| 148 | return (0); |
| 149 | } |
| 150 | |
| 151 | int |
| 152 | compat_13_sys_sigpending(struct lwp *l, const void *v, register_t *retval) |
| 153 | { |
| 154 | sigset13_t ess; |
| 155 | sigset_t bss; |
| 156 | |
| 157 | sigpending1(l, &bss); |
| 158 | native_sigset_to_sigset13(&bss, &ess); |
| 159 | *retval = ess; |
| 160 | return (0); |
| 161 | } |
| 162 | |
| 163 | int |
| 164 | compat_13_sys_sigsuspend(struct lwp *l, const struct compat_13_sys_sigsuspend_args *uap, register_t *retval) |
| 165 | { |
| 166 | /* { |
| 167 | syscallarg(sigset13_t) mask; |
| 168 | } */ |
| 169 | sigset13_t ess; |
| 170 | sigset_t bss; |
| 171 | |
| 172 | ess = SCARG(uap, mask); |
| 173 | native_sigset13_to_sigset(&ess, &bss); |
| 174 | return (sigsuspend1(l, &bss)); |
| 175 | } |
| 176 | |