mach/mach_init_ports.c

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * @OSF_COPYRIGHT@
  25  */
  26
  27 /*
  28  * Mach Operating System
  29  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  30  * All Rights Reserved.
  31  *
  32  * Permission to use, copy, modify and distribute this software and its
  33  * documentation is hereby granted, provided that both the copyright
  34  * notice and this permission notice appear in all copies of the
  35  * software, derivative works or modified versions, and any portions
  36  * thereof, and that both notices appear in supporting documentation.
  37  *
  38  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  39  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  40  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  41  *
  42  * Carnegie Mellon requests users of this software to return to
  43  *
  44  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  45  *  School of Computer Science
  46  *  Carnegie Mellon University
  47  *  Pittsburgh PA 15213-3890
  48  *
  49  * any improvements or extensions that they make and grant Carnegie Mellon
  50  * the rights to redistribute these changes.
  51  */
  52
  53 #include <mach/mach.h>
  54 #include <stdlib.h>
  55 #include "externs.h"
  56
  57 mach_port_t     bootstrap_port = MACH_PORT_NULL;
  58 mach_port_t     name_server_port = MACH_PORT_NULL;
  59 mach_port_t     environment_port = MACH_PORT_NULL;
  60 mach_port_t     service_port = MACH_PORT_NULL;
  61 mach_port_t     clock_port = MACH_PORT_NULL;
  62 mach_port_t thread_recycle_port = MACH_PORT_NULL;
  63
  64 void
  65 mach_init_ports(void)
  66 {
  67         mach_port_array_t       ports;
  68         mach_msg_type_number_t  ports_count;
  69         kern_return_t           kr;
  70         host_t                  host;
  71
  72         /*
  73          *      Find those ports important to every task.
  74          */
  75         kr = task_get_special_port(mach_task_self(),
  76                                    TASK_BOOTSTRAP_PORT,
  77                                    &bootstrap_port);
  78         if (kr != KERN_SUCCESS)
  79             return;
  80
  81         kr = mach_ports_lookup(mach_task_self(), &ports,
  82                                &ports_count);
  83         if ((kr != KERN_SUCCESS) ||
  84             (ports_count < MACH_PORTS_SLOTS_USED))
  85             return;
  86
  87         name_server_port = ports[NAME_SERVER_SLOT];
  88         environment_port = ports[ENVIRONMENT_SLOT];
  89         service_port     = ports[SERVICE_SLOT];
  90
  91         /* get rid of out-of-line data so brk has a chance of working */
  92
  93         (void) vm_deallocate(mach_task_self(),
  94                              (vm_offset_t) ports,
  95                              (vm_size_t) (ports_count * sizeof *ports));
  96
  97         /* Get the clock service port for nanosleep */
  98         host = mach_host_self();
  99         kr = host_get_clock_service(host, SYSTEM_CLOCK, &clock_port);
 100         if (kr != KERN_SUCCESS) {
 101             abort();
 102         }
 103         mach_port_deallocate(mach_task_self(), host);
 104         kr = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &thread_recycle_port);
 105         if (kr != KERN_SUCCESS) {
 106             abort();
 107         }
 108 }
 109
 110 #ifdef notdef
 111 /* will have problems with dylib build --> not needed anyway */
 112 #ifndef lint
 113 /*
 114  *      Routines which our library must suck in, to avoid
 115  *      a later library from referencing them and getting
 116  *      the wrong version.
 117  */
 118 extern void _replacements(void);
 119
 120 void
 121 _replacements(void)
 122 {
 123         (void)sbrk(0);                  /* Pull in our sbrk/brk */
 124         (void)malloc(0);                /* Pull in our malloc package */
 125 }
 126 #endif  /* lint */
 127 #endif /* notdef */