sys/compat/darwin/darwin_thread.c

   1 /*      $NetBSD: darwin_thread.c,v 1.15.8.2 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_thread.c,v 1.15.8.2 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/signal.h>
  39 #include <sys/mount.h>
  40 #include <sys/proc.h>
  41
  42 #include <sys/syscallargs.h>
  43
  44 #include <compat/sys/signal.h>
  45
  46 #include <compat/mach/mach_types.h>
  47 #include <compat/mach/mach_exec.h>
  48 #include <compat/mach/mach_vm.h>
  49
  50 #include <compat/darwin/darwin_types.h>
  51 #include <compat/darwin/darwin_audit.h>
  52 #include <compat/darwin/darwin_signal.h>
  53 #include <compat/darwin/darwin_syscallargs.h>
  54
  55 #include <machine/darwin_machdep.h>
  56
  57 /*
  58  * darwin_fork_child_return() sets the return values as expected by Darwin
  59  * userland: libSystem stub expects the child pid to be in retval[0] for
  60  * the parent as well as the child.
  61  */
  62 int
  63 darwin_sys_fork(struct lwp *l, const void *v, register_t *retval)
  64 {
  65         int error;
  66
  67         if ((error = fork1(l, 0, SIGCHLD, NULL, 0,
  68             darwin_fork_child_return, NULL, retval, NULL)) != 0)
  69                 return error;
  70
  71         return 0;
  72 }
  73
  74 int
  75 darwin_sys_vfork(struct lwp *l, const void *v, register_t *retval)
  76 {
  77         int error;
  78
  79         if ((error = fork1(l, FORK_PPWAIT, SIGCHLD, NULL, 0,
  80             darwin_fork_child_return, NULL, retval, NULL)) != 0)
  81                 return error;
  82
  83         return 0;
  84 }
  85
  86 int
  87 darwin_sys_pthread_exit(struct lwp *l, const struct darwin_sys_pthread_exit_args *uap, register_t *retval)
  88 {
  89         /* {
  90                 syscallarg(void *) value_ptr;
  91         } */
  92         struct sys_exit_args cup;
  93         struct mach_emuldata *med;
  94         struct proc *p = l->l_proc;
  95         int error;
  96
  97         /* Get the status or use zero if it is not possible */
  98         if ((error = copyin(SCARG(uap, value_ptr), &SCARG(&cup, rval),
  99             sizeof(void *))) != 0)
 100                 SCARG(&cup, rval) = 0;
 101
 102         /* Avoid destroying the parent's rights in mach_e_proc_exit */
 103         med = (struct mach_emuldata *)p->p_emuldata;
 104         LIST_INIT(&med->med_right);
 105
 106         return sys_exit(l, &cup, retval);
 107 }