osfmk/ipc/ipc_init.c

   1 /*
   2  * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  23  * Please see the License for the specific language governing rights and
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  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  58  * support for mandatory and extensible security protections.  This notice
  59  * is included in support of clause 2.2 (b) of the Apple Public License,
  60  * Version 2.0.
  61  * Copyright (c) 2005 SPARTA, Inc.
  62  */
  63 /*
  64  */
  65 /*
  66  *      File:   ipc/ipc_init.c
  67  *      Author: Rich Draves
  68  *      Date:   1989
  69  *
  70  *      Functions to initialize the IPC system.
  71  */
  72
  73 #include <mach_debug.h>
  74
  75 #include <mach/port.h>
  76 #include <mach/message.h>
  77 #include <mach/kern_return.h>
  78
  79 #include <kern/kern_types.h>
  80 #include <kern/arcade.h>
  81 #include <kern/kalloc.h>
  82 #include <kern/simple_lock.h>
  83 #include <kern/mach_param.h>
  84 #include <kern/ipc_host.h>
  85 #include <kern/ipc_kobject.h>
  86 #include <kern/ipc_mig.h>
  87 #include <kern/host_notify.h>
  88 #include <kern/mk_timer.h>
  89 #include <kern/misc_protos.h>
  90 #include <kern/suid_cred.h>
  91 #include <kern/sync_lock.h>
  92 #include <kern/sync_sema.h>
  93 #include <kern/ux_handler.h>
  94 #include <vm/vm_map.h>
  95 #include <vm/vm_kern.h>
  96
  97 #include <ipc/ipc_entry.h>
  98 #include <ipc/ipc_space.h>
  99 #include <ipc/ipc_object.h>
 100 #include <ipc/ipc_port.h>
 101 #include <ipc/ipc_pset.h>
 102 #include <ipc/ipc_notify.h>
 103 #include <ipc/ipc_kmsg.h>
 104 #include <ipc/ipc_hash.h>
 105 #include <ipc/ipc_init.h>
 106 #include <ipc/ipc_table.h>
 107 #include <ipc/ipc_voucher.h>
 108 #include <ipc/ipc_importance.h>
 109 #include <ipc/ipc_eventlink.h>
 110
 111 #include <mach/machine/ndr_def.h>   /* NDR_record */
 112
 113 #define IPC_KERNEL_MAP_SIZE      (1024 * 1024)
 114 SECURITY_READ_ONLY_LATE(vm_map_t) ipc_kernel_map;
 115
 116 /* values to limit physical copy out-of-line memory descriptors */
 117 SECURITY_READ_ONLY_LATE(vm_map_t) ipc_kernel_copy_map;
 118 #define IPC_KERNEL_COPY_MAP_SIZE (8 * 1024 * 1024)
 119 const vm_size_t ipc_kmsg_max_vm_space = ((IPC_KERNEL_COPY_MAP_SIZE * 7) / 8);
 120
 121 /*
 122  * values to limit inline message body handling
 123  * avoid copyin/out limits - even after accounting for maximum descriptor expansion.
 124  */
 125 #define IPC_KMSG_MAX_SPACE (64 * 1024 * 1024) /* keep in sync with COPYSIZELIMIT_PANIC */
 126 const vm_size_t ipc_kmsg_max_body_space = ((IPC_KMSG_MAX_SPACE * 3) / 4 - MAX_TRAILER_SIZE);
 127
 128 LCK_GRP_DECLARE(ipc_lck_grp, "ipc");
 129 LCK_ATTR_DECLARE(ipc_lck_attr, 0, 0);
 130
 131 /*
 132  * XXX tunable, belongs in mach.message.h
 133  */
 134 #define MSG_OOL_SIZE_SMALL_MAX (2*PAGE_SIZE)
 135 SECURITY_READ_ONLY_LATE(vm_size_t) msg_ool_size_small;
 136
 137 /*
 138  *      Routine:        ipc_init
 139  *      Purpose:
 140  *              Final initialization
 141  */
 142 __startup_func
 143 static void
 144 ipc_init(void)
 145 {
 146         kern_return_t kr;
 147         vm_offset_t min;
 148
 149         /* create special spaces */
 150
 151         kr = ipc_space_create_special(&ipc_space_kernel);
 152         assert(kr == KERN_SUCCESS);
 153
 154         kr = ipc_space_create_special(&ipc_space_reply);
 155         assert(kr == KERN_SUCCESS);
 156
 157         /* initialize modules with hidden data structures */
 158
 159 #if IMPORTANCE_INHERITANCE
 160         ipc_importance_init();
 161 #endif
 162 #if CONFIG_ARCADE
 163         arcade_init();
 164 #endif
 165
 166         kr = kmem_suballoc(kernel_map, &min, IPC_KERNEL_MAP_SIZE,
 167             TRUE,
 168             (VM_FLAGS_ANYWHERE),
 169             VM_MAP_KERNEL_FLAGS_NONE,
 170             VM_KERN_MEMORY_IPC,
 171             &ipc_kernel_map);
 172
 173         if (kr != KERN_SUCCESS) {
 174                 panic("ipc_init: kmem_suballoc of ipc_kernel_map failed");
 175         }
 176
 177         kr = kmem_suballoc(kernel_map, &min, IPC_KERNEL_COPY_MAP_SIZE,
 178             TRUE,
 179             (VM_FLAGS_ANYWHERE),
 180             VM_MAP_KERNEL_FLAGS_NONE,
 181             VM_KERN_MEMORY_IPC,
 182             &ipc_kernel_copy_map);
 183
 184         if (kr != KERN_SUCCESS) {
 185                 panic("ipc_init: kmem_suballoc of ipc_kernel_copy_map failed");
 186         }
 187
 188         ipc_kernel_copy_map->no_zero_fill = TRUE;
 189         ipc_kernel_copy_map->wait_for_space = TRUE;
 190
 191         /*
 192          * As an optimization, 'small' out of line data regions using a
 193          * physical copy strategy are copied into kalloc'ed buffers.
 194          * The value of 'small' is determined here.  Requests kalloc()
 195          * with sizes greater or equal to kalloc_max_prerounded may fail.
 196          */
 197         if (kalloc_max_prerounded <= MSG_OOL_SIZE_SMALL_MAX) {
 198                 msg_ool_size_small = kalloc_max_prerounded;
 199         } else {
 200                 msg_ool_size_small = MSG_OOL_SIZE_SMALL_MAX;
 201         }
 202
 203         ipc_host_init();
 204         ux_handler_init();
 205 }
 206 STARTUP(MACH_IPC, STARTUP_RANK_LAST, ipc_init);
 207
 208
 209 /*
 210  *      Routine:        ipc_thread_call_init
 211  *      Purpose:
 212  *              Initialize IPC logic that needs thread call support
 213  */
 214
 215 void
 216 ipc_thread_call_init(void)
 217 {
 218 #if IMPORTANCE_INHERITANCE
 219         ipc_importance_thread_call_init();
 220 #endif
 221 }