sys/compat/darwin/darwin_signal.c

   1 /*      $NetBSD: darwin_signal.c,v 1.28.8.2 2008/11/01 21:22:25 christos Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Emmanuel Dreyfus.
   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: darwin_signal.c,v 1.28.8.2 2008/11/01 21:22:25 christos Exp $");
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/mount.h>
  39 #include <sys/proc.h>
  40 #include <sys/signal.h>
  41 #include <sys/syscallargs.h>
  42
  43 #include <compat/sys/signal.h>
  44 #include <compat/sys/signalvar.h>
  45
  46 #include <compat/common/compat_util.h>
  47
  48 #include <compat/mach/mach_types.h>
  49 #include <compat/mach/mach_vm.h>
  50 #include <compat/mach/mach_port.h>
  51 #include <compat/mach/mach_exception.h>
  52
  53 #include <compat/darwin/darwin_types.h>
  54 #include <compat/darwin/darwin_audit.h>
  55 #include <compat/darwin/darwin_exec.h>
  56 #include <compat/darwin/darwin_signal.h>
  57 #include <compat/darwin/darwin_syscallargs.h>
  58
  59 int
  60 darwin_sys_sigaction(struct lwp *l, const struct darwin_sys_sigaction_args *uap, register_t *retval)
  61 {
  62         /* {
  63                 syscallarg(int) signum;
  64                 syscallarg(struct darwin___sigaction *) nsa;
  65                 syscallarg(struct sigaction13 *) osa;
  66         } */
  67         struct darwin___sigaction dsa;
  68         struct sigaction nsa, osa;
  69         struct sigaction13 sa13;
  70         int error;
  71
  72         if ((error = copyin(SCARG(uap, nsa), &dsa, sizeof(dsa))) != 0)
  73                 return error;
  74
  75         nsa.sa_handler = dsa.darwin_sa_handler.__sa_handler;
  76         native_sigset13_to_sigset(&dsa.darwin_sa_mask, &nsa.sa_mask);
  77         if (dsa.darwin_sa_flags & ~DARWIN_SA_ALLBITS) {
  78                 DPRINTF(("darwin_sys_sigaction: ignoring bits (flags = %x)\n",
  79                     dsa.darwin_sa_flags));
  80         }
  81         nsa.sa_flags = dsa.darwin_sa_flags & DARWIN_SA_ALLBITS;
  82
  83         error = sigaction1(l, SCARG(uap, signum), &nsa, &osa,
  84             dsa.darwin_sa_tramp, 1);
  85         if (error != 0)
  86                 return error;
  87
  88         if (SCARG(uap, osa) == NULL)
  89                 return 0;
  90
  91         /* XXX: The returned structure has a different type to that supplied */
  92         sa13.osa_handler = osa.sa_handler;
  93         sa13.osa_mask = osa.sa_mask.__bits[0];
  94         native_sigset_to_sigset13(&osa.sa_mask, &sa13.osa_mask);
  95         sa13.osa_flags = osa.sa_flags;
  96
  97         return copyout(&sa13, SCARG(uap, osa), sizeof(sa13));
  98 }
  99
 100 void
 101 darwin_trapsignal(struct lwp *l, struct ksiginfo *ksi)
 102 {
 103         if (mach_trapsignal1(l, ksi) != 0)
 104                 trapsignal(l, ksi);
 105
 106         return;
 107 }
 108
 109 int
 110 darwin_tracesig(struct proc *p, int signo)
 111 {
 112         struct darwin_emuldata *ded;
 113         struct lwp *l;
 114         int code[2];
 115         int error;
 116
 117         /*
 118          * If the process does not have softsignals,
 119          * we are done, normal signal delivery should
 120          * occur.
 121          */
 122         ded = (struct darwin_emuldata *)p->p_emuldata;
 123         if ((ded->ded_flags & DARWIN_DED_SIGEXC) == 0)
 124                 return 0;
 125
 126         code[0] = MACH_SOFT_SIGNAL;
 127         code[1] = signo;
 128         l = LIST_FIRST(&p->p_lwps);
 129         KASSERT(l != NULL);
 130         error = mach_exception(l, MACH_EXC_SOFTWARE, code);
 131
 132         /* Inhibit normal signal delivery */
 133         return EINVAL;
 134 }
 135
 136 int
 137 darwin_sys_sigprocmask(struct lwp *l, const struct darwin_sys_sigprocmask_args *uap, register_t *retval)
 138 {
 139         /* {
 140                 syscallarg(int) how;
 141                 syscallarg(sigset13_t *) set;
 142                 syscallarg(sigset13_t *) oset;
 143         } */
 144         int error;
 145         sigset13_t kdset;
 146         sigset_t kbset, kboset;
 147
 148         if (SCARG(uap, set) != NULL) {
 149                 error = copyin(SCARG(uap, set), &kdset, sizeof(kdset));
 150                 if (error != 0)
 151                         return error;
 152                 native_sigset13_to_sigset(&kdset, &kbset);
 153                 error = sigprocmask1(l, SCARG(uap, how), &kbset, &kboset);
 154         } else
 155                 error = sigprocmask1(l, SCARG(uap, how), NULL, &kboset);
 156
 157         if (SCARG(uap, oset) == NULL || error != 0)
 158                 return error;
 159
 160         native_sigset_to_sigset13(&kboset, &kdset);
 161         return copyout(&kdset, SCARG(uap, oset), sizeof(kdset));
 162 }
 163
 164 void
 165 native_to_darwin_siginfo(const struct ksiginfo *ksi, struct darwin___siginfo *dsi)
 166 {
 167         dsi->darwin_si_signo = ksi->ksi_signo;
 168         dsi->darwin_si_errno = ksi->ksi_errno;
 169         dsi->darwin_si_code = ksi->ksi_code;
 170         dsi->darwin_si_pid = ksi->ksi_pid;
 171         dsi->darwin_si_uid = ksi->ksi_uid;
 172         dsi->darwin_si_status = ksi->ksi_status;
 173         dsi->darwin_si_addr = ksi->ksi_addr;
 174         (void)memcpy(&dsi->darwin_si_value,
 175             &ksi->ksi_value, sizeof(dsi->darwin_si_value));
 176         dsi->darwin_si_band = ksi->ksi_band;
 177
 178         return;
 179 }