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 |
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10 | * may not be used to create, or enable the creation or redistribution of, |
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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 | * |
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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/port.h> |
74 | #include <mach/message.h> |
75 | #include <mach/kern_return.h> |
76 | |
77 | #include <kern/kern_types.h> |
78 | #include <kern/arcade.h> |
79 | #include <kern/kalloc.h> |
80 | #include <kern/simple_lock.h> |
81 | #include <kern/mach_param.h> |
82 | #include <kern/ipc_host.h> |
83 | #include <kern/ipc_kobject.h> |
84 | #include <kern/ipc_mig.h> |
85 | #include <kern/host_notify.h> |
86 | #include <kern/misc_protos.h> |
87 | #include <kern/sync_sema.h> |
88 | #include <kern/ux_handler.h> |
89 | #include <vm/vm_map.h> |
90 | #include <vm/vm_kern.h> |
91 | |
92 | #include <ipc/ipc_entry.h> |
93 | #include <ipc/ipc_space.h> |
94 | #include <ipc/ipc_object.h> |
95 | #include <ipc/ipc_port.h> |
96 | #include <ipc/ipc_pset.h> |
97 | #include <ipc/ipc_notify.h> |
98 | #include <ipc/ipc_kmsg.h> |
99 | #include <ipc/ipc_hash.h> |
100 | #include <ipc/ipc_init.h> |
101 | #include <ipc/ipc_voucher.h> |
102 | #include <ipc/ipc_eventlink.h> |
103 | |
104 | #include <mach/machine/ndr_def.h> /* NDR_record */ |
105 | |
106 | SECURITY_READ_ONLY_LATE(vm_map_t) ipc_kernel_map; |
107 | |
108 | /* values to limit physical copy out-of-line memory descriptors */ |
109 | SECURITY_READ_ONLY_LATE(vm_map_t) ipc_kernel_copy_map; |
110 | #define IPC_KERNEL_COPY_MAP_SIZE (8 * 1024 * 1024) |
111 | const vm_size_t ipc_kmsg_max_vm_space = ((IPC_KERNEL_COPY_MAP_SIZE * 7) / 8); |
112 | |
113 | #define IPC_KERNEL_MAP_SIZE (CONFIG_IPC_KERNEL_MAP_SIZE << 20) |
114 | |
115 | /* Note: Consider Developer Mode when changing the default. */ |
116 | #if XNU_TARGET_OS_OSX |
117 | #define IPC_CONTROL_PORT_OPTIONS_DEFAULT (ICP_OPTIONS_IMMOVABLE_1P_HARD | ICP_OPTIONS_PINNED_1P_HARD) |
118 | #else |
119 | #define IPC_CONTROL_PORT_OPTIONS_DEFAULT (ICP_OPTIONS_IMMOVABLE_ALL_HARD | \ |
120 | ICP_OPTIONS_PINNED_1P_HARD | \ |
121 | ICP_OPTIONS_PINNED_3P_SOFT) |
122 | #endif |
123 | |
124 | TUNABLE(ipc_control_port_options_t, ipc_control_port_options, |
125 | "ipc_control_port_options" , IPC_CONTROL_PORT_OPTIONS_DEFAULT); |
126 | |
127 | LCK_GRP_DECLARE(ipc_lck_grp, "ipc" ); |
128 | LCK_ATTR_DECLARE(ipc_lck_attr, 0, 0); |
129 | |
130 | /* |
131 | * As an optimization, 'small' out of line data regions using a |
132 | * physical copy strategy are copied into kalloc'ed buffers. |
133 | * The value of 'small' is determined here. Requests kalloc() |
134 | * with sizes greater than msg_ool_size_small may fail. |
135 | */ |
136 | const vm_size_t msg_ool_size_small = KHEAP_MAX_SIZE; |
137 | __startup_data |
138 | static struct mach_vm_range ipc_kernel_range; |
139 | __startup_data |
140 | static struct mach_vm_range ipc_kernel_copy_range; |
141 | KMEM_RANGE_REGISTER_STATIC(ipc_kernel_map, &ipc_kernel_range, |
142 | IPC_KERNEL_MAP_SIZE); |
143 | KMEM_RANGE_REGISTER_STATIC(ipc_kernel_copy_map, &ipc_kernel_copy_range, |
144 | IPC_KERNEL_COPY_MAP_SIZE); |
145 | |
146 | /* |
147 | * Routine: ipc_init |
148 | * Purpose: |
149 | * Final initialization |
150 | */ |
151 | __startup_func |
152 | static void |
153 | ipc_init(void) |
154 | { |
155 | kern_return_t kr; |
156 | |
157 | /* create special spaces */ |
158 | |
159 | kr = ipc_space_create_special(spacep: &ipc_space_kernel); |
160 | assert(kr == KERN_SUCCESS); |
161 | |
162 | kr = ipc_space_create_special(spacep: &ipc_space_reply); |
163 | assert(kr == KERN_SUCCESS); |
164 | |
165 | /* initialize modules with hidden data structures */ |
166 | |
167 | #if CONFIG_ARCADE |
168 | arcade_init(); |
169 | #endif |
170 | |
171 | bool pinned_control_port_enabled_1p = !!(ipc_control_port_options & ICP_OPTIONS_1P_PINNED); |
172 | bool immovable_control_port_enabled_1p = !!(ipc_control_port_options & ICP_OPTIONS_1P_IMMOVABLE); |
173 | |
174 | bool pinned_control_port_enabled_3p = !!(ipc_control_port_options & ICP_OPTIONS_3P_PINNED); |
175 | bool immovable_control_port_enabled_3p = !!(ipc_control_port_options & ICP_OPTIONS_3P_IMMOVABLE); |
176 | |
177 | if (pinned_control_port_enabled_1p && !immovable_control_port_enabled_1p) { |
178 | kprintf(fmt: "Invalid ipc_control_port_options boot-arg: pinned control port cannot be enabled without immovability enforcement. Ignoring 1p pinning boot-arg." ); |
179 | ipc_control_port_options &= ~ICP_OPTIONS_1P_PINNED; |
180 | } |
181 | |
182 | if (pinned_control_port_enabled_3p && !immovable_control_port_enabled_3p) { |
183 | kprintf(fmt: "Invalid ipc_control_port_options boot-arg: pinned control port cannot be enabled without immovability enforcement. Ignoring 3p pinning boot-arg." ); |
184 | ipc_control_port_options &= ~ICP_OPTIONS_3P_PINNED; |
185 | } |
186 | |
187 | ipc_kernel_map = kmem_suballoc(parent: kernel_map, addr: &ipc_kernel_range.min_address, |
188 | IPC_KERNEL_MAP_SIZE, vmc_options: VM_MAP_CREATE_PAGEABLE, |
189 | VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE, flags: KMS_PERMANENT | KMS_NOFAIL, |
190 | VM_KERN_MEMORY_IPC).kmr_submap; |
191 | |
192 | ipc_kernel_copy_map = kmem_suballoc(parent: kernel_map, addr: &ipc_kernel_copy_range.min_address, |
193 | IPC_KERNEL_COPY_MAP_SIZE, |
194 | vmc_options: VM_MAP_CREATE_PAGEABLE | VM_MAP_CREATE_DISABLE_HOLELIST, |
195 | VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE, flags: KMS_PERMANENT | KMS_NOFAIL, |
196 | VM_KERN_MEMORY_IPC).kmr_submap; |
197 | |
198 | ipc_kernel_copy_map->no_zero_fill = TRUE; |
199 | ipc_kernel_copy_map->wait_for_space = TRUE; |
200 | |
201 | ipc_host_init(); |
202 | ux_handler_init(); |
203 | } |
204 | STARTUP(MACH_IPC, STARTUP_RANK_LAST, ipc_init); |
205 | |