FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_sig_notalpha.c

     /*      $NetBSD: linux_sig_notalpha.c,v 1.38 2008/04/28 20:23:44 martin Exp $   */
     
     /*-
      * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Frank van der Linden and Eric Haszlakiewicz.
      *
     * 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.
     */
    
    /*
     * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: linux_sig_notalpha.c,v 1.38 2008/04/28 20:23:44 martin Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/proc.h>
    #include <sys/filedesc.h>
    #include <sys/mount.h>
    #include <sys/kernel.h>
    #include <sys/signal.h>
    #include <sys/signalvar.h>
    
    #include <sys/syscallargs.h>
    
    #include <compat/linux/common/linux_types.h>
    #include <compat/linux/common/linux_signal.h>
    #include <compat/linux/common/linux_util.h>
    #include <compat/linux/common/linux_ipc.h>
    #include <compat/linux/common/linux_sem.h>
    
    #include <compat/linux/linux_syscallargs.h>
    
    /* Used on: arm, i386, m68k, mips, sparc, sparc64 */
    /* Not used on: alpha */
    
    #if !defined(__amd64__)
    /*
     * The Linux signal() system call. I think that the signal() in the C
     * library actually calls sigaction, so I doubt this one is ever used.
     * But hey, it can't hurt having it here. The same restrictions as for
     * sigaction() apply.
     */
    int
    linux_sys_signal(struct lwp *l, const struct linux_sys_signal_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(int) signum;
                    syscallarg(linux_handler_t) handler;
            } */
            struct sigaction nbsa, obsa;
            int error, sig;
    
            *retval = -1;
            sig = SCARG(uap, signum);
            if (sig < 0 || sig >= LINUX__NSIG)
                    return (EINVAL);
    
            nbsa.sa_handler = SCARG(uap, handler);
            sigemptyset(&nbsa.sa_mask);
            nbsa.sa_flags = SA_RESETHAND | SA_NODEFER;
            error = sigaction1(l, linux_to_native_signo[sig],
                &nbsa, &obsa, NULL, 0);
            if (error == 0)
                    *retval = (int)(long)obsa.sa_handler; /* XXXmanu cast */
            return (error);
    }
    
    
    /* ARGSUSED */
    int
    linux_sys_siggetmask(struct lwp *l, const void *v, register_t *retval)
    {
            struct proc *p = l->l_proc;
            sigset_t bss;
           linux_old_sigset_t lss;
           int error;
   
           mutex_enter(p->p_lock);
           error = sigprocmask1(l, SIG_SETMASK, 0, &bss);
           mutex_exit(p->p_lock);
           if (error)
                   return (error);
           native_to_linux_old_sigset(&lss, &bss);
           return (0);
   }
   
   /*
    * The following three functions fiddle with a process' signal mask.
    * Convert the signal masks because of the different signal
    * values for Linux. The need for this is the reason why
    * they are here, and have not been mapped directly.
    */
   int
   linux_sys_sigsetmask(struct lwp *l, const struct linux_sys_sigsetmask_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(linux_old_sigset_t) mask;
           } */
           sigset_t nbss, obss;
           linux_old_sigset_t nlss, olss;
           struct proc *p = l->l_proc;
           int error;
   
           nlss = SCARG(uap, mask);
           linux_old_to_native_sigset(&nbss, &nlss);
           mutex_enter(p->p_lock);
           error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss);
           mutex_exit(p->p_lock);
           if (error)
                   return (error);
           native_to_linux_old_sigset(&olss, &obss);
           *retval = olss;
           return (0);
   }
   
   int
   linux_sys_sigprocmask(struct lwp *l, const struct linux_sys_sigprocmask_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) how;
                   syscallarg(const linux_old_sigset_t *) set;
                   syscallarg(linux_old_sigset_t *) oset;
           } */
   
           return(linux_sigprocmask1(l, SCARG(uap, how),
                                   SCARG(uap, set), SCARG(uap, oset)));
   }
   #endif /* !__amd64__ */
   
   /*
    * The deprecated pause(2), which is really just an instance
    * of sigsuspend(2).
    */
   int
   linux_sys_pause(struct lwp *l, const void *v, register_t *retval)
   {
   
           return (sigsuspend1(l, 0));
   }
   

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