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1 /*
2 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22 /*
23 *
24 * File: mach/shared_memory_server.h
25 *
26 * protos and struct definitions for shared library
27 * server and interface
28 */
29 #ifndef _MACH_SHARED_MEMORY_SERVER_H_
30 #define _MACH_SHARED_MEMORY_SERVER_H_
31
32 #include <sys/cdefs.h>
33 #include <mach/vm_prot.h>
34 #include <mach/vm_types.h>
35 #include <mach/mach_types.h>
36
37 #define VM_PROT_COW 0x8 /* must not interfere with normal prot assignments */
38 #define VM_PROT_ZF 0x10 /* must not interfere with normal prot assignments */
39
40
41 #if !defined(__LP64__)
42
43 #define SHARED_LIBRARY_SERVER_SUPPORTED
44 #define GLOBAL_SHARED_TEXT_SEGMENT 0x90000000
45 #define GLOBAL_SHARED_DATA_SEGMENT 0xA0000000
46 #define GLOBAL_SHARED_SEGMENT_MASK 0xF0000000
47
48 #define SHARED_TEXT_REGION_SIZE 0x10000000
49 #define SHARED_DATA_REGION_SIZE 0x10000000
50 #define SHARED_ALTERNATE_LOAD_BASE 0x09000000
51
52 /*
53 * Note: the two masks below are useful because the assumption is
54 * made that these shared regions will always be mapped on natural boundaries
55 * i.e. if the size is 0x10000000 the object can be mapped at
56 * 0x20000000, or 0x30000000, but not 0x1000000
57 */
58 #define SHARED_TEXT_REGION_MASK 0x0FFFFFFF
59 #define SHARED_DATA_REGION_MASK 0x0FFFFFFF
60
61 #define SHARED_LIB_ALIAS 0x10
62
63
64 /* flags field aliases for copyin_shared_file and load_shared_file */
65
66 /* IN */
67 #define ALTERNATE_LOAD_SITE 0x1
68 #define NEW_LOCAL_SHARED_REGIONS 0x2
69 #define QUERY_IS_SYSTEM_REGION 0x4
70
71 /* OUT */
72 #define SF_PREV_LOADED 0x1
73 #define SYSTEM_REGION_BACKED 0x2
74
75
76 struct sf_mapping {
77 vm_offset_t mapping_offset;
78 vm_size_t size;
79 vm_offset_t file_offset;
80 vm_prot_t protection; /* read/write/execute/COW/ZF */
81 vm_offset_t cksum;
82 };
83 typedef struct sf_mapping sf_mapping_t;
84
85 #ifndef KERNEL
86 /* load_shared_file and friends is deprecated */
87 __BEGIN_DECLS
88 int load_shared_file(char *, caddr_t, u_long,
89 caddr_t *, int, sf_mapping_t *, int *);
90 int reset_shared_file(caddr_t *, int, sf_mapping_t *);
91 int new_system_shared_regions(void);
92 __END_DECLS
93 #endif /* !KERNEL */
94
95 #endif /* !defined(__LP64__) */
96
97 /*
98 * All shared_region_* declarations are a private interface
99 * between dyld and the kernel.
100 *
101 */
102 struct shared_file_mapping_np {
103 mach_vm_address_t sfm_address;
104 mach_vm_size_t sfm_size;
105 mach_vm_offset_t sfm_file_offset;
106 vm_prot_t sfm_max_prot;
107 vm_prot_t sfm_init_prot;
108 };
109
110 struct shared_region_range_np {
111 mach_vm_address_t srr_address;
112 mach_vm_size_t srr_size;
113 };
114
115 #ifndef KERNEL
116
117 __BEGIN_DECLS
118 int shared_region_map_file_np(int fd,
119 uint32_t mappingCount,
120 const struct shared_file_mapping_np *mappings,
121 int64_t *slide_p);
122 int shared_region_make_private_np(uint32_t rangeCount,
123 const struct shared_region_range_np *ranges);
124 __END_DECLS
125
126 #endif /* !KERNEL */
127
128 #endif /* _MACH_SHARED_MEMORY_SERVER_H_ */