FreeBSD/Linux Kernel Cross Reference
sys/compat/darwin/darwin_signal.c

     /*      $NetBSD: darwin_signal.c,v 1.30 2008/07/02 19:49:58 rmind Exp $ */
     
     /*-
      * Copyright (c) 2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Emmanuel Dreyfus.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: darwin_signal.c,v 1.30 2008/07/02 19:49:58 rmind Exp $");
    
    #include <sys/types.h>
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/mount.h>
    #include <sys/proc.h>
    #include <sys/signal.h>
    #include <sys/syscallargs.h>
    
    #include <compat/sys/signal.h>
    #include <compat/sys/signalvar.h>
    
    #include <compat/common/compat_util.h>
    
    #include <compat/mach/mach_types.h>
    #include <compat/mach/mach_vm.h>
    #include <compat/mach/mach_port.h>
    #include <compat/mach/mach_exception.h>
    
    #include <compat/darwin/darwin_audit.h>
    #include <compat/darwin/darwin_exec.h>
    #include <compat/darwin/darwin_signal.h>
    #include <compat/darwin/darwin_syscallargs.h>
    
    int
    darwin_sys_sigaction(struct lwp *l, const struct darwin_sys_sigaction_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(int) signum;
                    syscallarg(struct darwin___sigaction *) nsa;
                    syscallarg(struct sigaction13 *) osa;
            } */
            struct darwin___sigaction dsa;
            struct sigaction nsa, osa;
            struct sigaction13 sa13;
            int error;
    
            if ((error = copyin(SCARG(uap, nsa), &dsa, sizeof(dsa))) != 0)
                    return error;
    
            nsa.sa_handler = dsa.darwin_sa_handler.__sa_handler;
            native_sigset13_to_sigset(&dsa.darwin_sa_mask, &nsa.sa_mask);
            if (dsa.darwin_sa_flags & ~DARWIN_SA_ALLBITS) {
                    DPRINTF(("darwin_sys_sigaction: ignoring bits (flags = %x)\n",
                        dsa.darwin_sa_flags));
            }
            nsa.sa_flags = dsa.darwin_sa_flags & DARWIN_SA_ALLBITS;
    
            error = sigaction1(l, SCARG(uap, signum), &nsa, &osa,
                dsa.darwin_sa_tramp, 1);
            if (error != 0)
                    return error;
    
            if (SCARG(uap, osa) == NULL)
                    return 0;
    
            /* XXX: The returned structure has a different type to that supplied */
            sa13.osa_handler = osa.sa_handler;
            sa13.osa_mask = osa.sa_mask.__bits[0];
            native_sigset_to_sigset13(&osa.sa_mask, &sa13.osa_mask);
            sa13.osa_flags = osa.sa_flags;
    
            return copyout(&sa13, SCARG(uap, osa), sizeof(sa13));
    }
    
    void
   darwin_trapsignal(struct lwp *l, struct ksiginfo *ksi)
   {
           if (mach_trapsignal1(l, ksi) != 0)
                   trapsignal(l, ksi);
   
           return;
   }
   
   int
   darwin_tracesig(struct proc *p, int signo)
   {
           struct darwin_emuldata *ded;
           struct lwp *l;
           int code[2];
           int error;
   
           /*
            * If the process does not have softsignals,
            * we are done, normal signal delivery should
            * occur.
            */
           ded = (struct darwin_emuldata *)p->p_emuldata;
           if ((ded->ded_flags & DARWIN_DED_SIGEXC) == 0)
                   return 0;
   
           code[0] = MACH_SOFT_SIGNAL;
           code[1] = signo;
           l = LIST_FIRST(&p->p_lwps);
           KASSERT(l != NULL);
           error = mach_exception(l, MACH_EXC_SOFTWARE, code);
   
           /* Inhibit normal signal delivery */
           return EINVAL;
   }
   
   int
   darwin_sys_sigprocmask(struct lwp *l, const struct darwin_sys_sigprocmask_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) how;
                   syscallarg(sigset13_t *) set;
                   syscallarg(sigset13_t *) oset;
           } */
           int error;
           sigset13_t kdset;
           sigset_t kbset, kboset;
   
           if (SCARG(uap, set) != NULL) {
                   error = copyin(SCARG(uap, set), &kdset, sizeof(kdset));
                   if (error != 0)
                           return error;
                   native_sigset13_to_sigset(&kdset, &kbset);
                   error = sigprocmask1(l, SCARG(uap, how), &kbset, &kboset);
           } else
                   error = sigprocmask1(l, SCARG(uap, how), NULL, &kboset);
   
           if (SCARG(uap, oset) == NULL || error != 0)
                   return error;
   
           native_sigset_to_sigset13(&kboset, &kdset);
           return copyout(&kdset, SCARG(uap, oset), sizeof(kdset));
   }
   
   void
   native_to_darwin_siginfo(const struct ksiginfo *ksi, struct darwin___siginfo *dsi)
   {
           dsi->darwin_si_signo = ksi->ksi_signo;
           dsi->darwin_si_errno = ksi->ksi_errno;
           dsi->darwin_si_code = ksi->ksi_code;
           dsi->darwin_si_pid = ksi->ksi_pid;
           dsi->darwin_si_uid = ksi->ksi_uid;
           dsi->darwin_si_status = ksi->ksi_status;
           dsi->darwin_si_addr = ksi->ksi_addr;
           (void)memcpy(&dsi->darwin_si_value,
               &ksi->ksi_value, sizeof(dsi->darwin_si_value));
           dsi->darwin_si_band = ksi->ksi_band;
   
           return;
   }

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