sys/compat/common/kern_sig_13.c

   1 /*      $NetBSD: kern_sig_13.c,v 1.18 2008/04/24 18:39:22 ad 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 1.18 2008/04/24 18:39:22 ad 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/mount.h>
  42 #include <sys/syscallargs.h>
  43
  44 #include <machine/limits.h>
  45
  46 #include <compat/sys/signal.h>
  47 #include <compat/sys/signalvar.h>
  48 #include <compat/common/compat_util.h>
  49 #include <compat/common/compat_sigaltstack.h>
  50
  51 void
  52 native_sigset13_to_sigset(const sigset13_t *oss, sigset_t *ss)
  53 {
  54
  55         ss->__bits[0] = *oss;
  56         ss->__bits[1] = 0;
  57         ss->__bits[2] = 0;
  58         ss->__bits[3] = 0;
  59 }
  60
  61 void
  62 native_sigset_to_sigset13(const sigset_t *ss, sigset13_t *oss)
  63 {
  64
  65         *oss = ss->__bits[0];
  66 }
  67
  68 void
  69 native_sigaction13_to_sigaction(const struct sigaction13 *osa, struct sigaction *sa)
  70 {
  71
  72         sa->sa_handler = osa->osa_handler;
  73         native_sigset13_to_sigset(&osa->osa_mask, &sa->sa_mask);
  74         sa->sa_flags = osa->osa_flags;
  75 }
  76
  77 void
  78 native_sigaction_to_sigaction13(const struct sigaction *sa, struct sigaction13 *osa)
  79 {
  80
  81         osa->osa_handler = sa->sa_handler;
  82         native_sigset_to_sigset13(&sa->sa_mask, &osa->osa_mask);
  83         osa->osa_flags = sa->sa_flags;
  84 }
  85
  86 int
  87 compat_13_sys_sigaltstack(struct lwp *l, const struct compat_13_sys_sigaltstack_args *uap, register_t *retval)
  88 {
  89         /* {
  90                 syscallarg(const struct sigaltstack13 *) nss;
  91                 syscallarg(struct sigaltstack13 *) oss;
  92         } */
  93         compat_sigaltstack(uap, sigaltstack13, SS_ONSTACK, SS_DISABLE);
  94 }
  95
  96 int
  97 compat_13_sys_sigaction(struct lwp *l, const struct compat_13_sys_sigaction_args *uap, register_t *retval)
  98 {
  99         /* {
 100                 syscallarg(int) signum;
 101                 syscallarg(const struct sigaction13 *) nsa;
 102                 syscallarg(struct sigaction13 *) osa;
 103         } */
 104         struct sigaction13 nesa, oesa;
 105         struct sigaction nbsa, obsa;
 106         int error;
 107
 108         if (SCARG(uap, nsa)) {
 109                 error = copyin(SCARG(uap, nsa), &nesa, sizeof(nesa));
 110                 if (error)
 111                         return (error);
 112                 native_sigaction13_to_sigaction(&nesa, &nbsa);
 113         }
 114         error = sigaction1(l, SCARG(uap, signum),
 115             SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0,
 116             NULL, 0);
 117         if (error)
 118                 return (error);
 119         if (SCARG(uap, osa)) {
 120                 native_sigaction_to_sigaction13(&obsa, &oesa);
 121                 error = copyout(&oesa, SCARG(uap, osa), sizeof(oesa));
 122                 if (error)
 123                         return (error);
 124         }
 125         return (0);
 126 }
 127
 128 int
 129 compat_13_sys_sigprocmask(struct lwp *l, const struct compat_13_sys_sigprocmask_args *uap, register_t *retval)
 130 {
 131         /* {
 132                 syscallarg(int) how;
 133                 syscallarg(int) mask;
 134         } */
 135         struct proc *p = l->l_proc;
 136         sigset13_t ness, oess;
 137         sigset_t nbss, obss;
 138         int error;
 139
 140         ness = SCARG(uap, mask);
 141         native_sigset13_to_sigset(&ness, &nbss);
 142         mutex_enter(p->p_lock);
 143         error = sigprocmask1(l, SCARG(uap, how), &nbss, &obss);
 144         mutex_exit(p->p_lock);
 145         if (error)
 146                 return (error);
 147         native_sigset_to_sigset13(&obss, &oess);
 148         *retval = oess;
 149         return (0);
 150 }
 151
 152 int
 153 compat_13_sys_sigpending(struct lwp *l, const void *v, register_t *retval)
 154 {
 155         sigset13_t ess;
 156         sigset_t bss;
 157
 158         sigpending1(l, &bss);
 159         native_sigset_to_sigset13(&bss, &ess);
 160         *retval = ess;
 161         return (0);
 162 }
 163
 164 int
 165 compat_13_sys_sigsuspend(struct lwp *l, const struct compat_13_sys_sigsuspend_args *uap, register_t *retval)
 166 {
 167         /* {
 168                 syscallarg(sigset13_t) mask;
 169         } */
 170         sigset13_t ess;
 171         sigset_t bss;
 172
 173         ess = SCARG(uap, mask);
 174         native_sigset13_to_sigset(&ess, &bss);
 175         return (sigsuspend1(l, &bss));
 176 }