sys/compat/linux/common/linux_sig_notalpha.c

   1 /*      $NetBSD: linux_sig_notalpha.c,v 1.38 2008/04/28 20:23:44 martin 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 1.38 2008/04/28 20:23:44 martin 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