1/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
2 *
3 * Copyright (c) 2006-2009 Apple Inc. All rights reserved.
4 *
5 * @APPLE_LICENSE_HEADER_START@
6 *
7 * This file contains Original Code and/or Modifications of Original Code
8 * as defined in and that are subject to the Apple Public Source License
9 * Version 2.0 (the 'License'). You may not use this file except in
10 * compliance with the License. Please obtain a copy of the License at
11 * http://www.opensource.apple.com/apsl/ and read it before using this
12 * file.
13 *
14 * The Original Code and all software distributed under the License are
15 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
19 * Please see the License for the specific language governing rights and
20 * limitations under the License.
21 *
22 * @APPLE_LICENSE_HEADER_END@
23 */
24#ifndef __DYLD_CACHE_FORMAT__
25#define __DYLD_CACHE_FORMAT__
26
27#include <sys/types.h>
28#include <stdint.h>
29#include <mach/shared_region.h>
30
31
32struct dyld_cache_header
33{
34	char		magic[16];				// e.g. "dyld_v0    i386"
35	uint32_t	mappingOffset;			// file offset to first dyld_cache_mapping_info
36	uint32_t	mappingCount;			// number of dyld_cache_mapping_info entries
37	uint32_t	imagesOffset;			// file offset to first dyld_cache_image_info
38	uint32_t	imagesCount;			// number of dyld_cache_image_info entries
39	uint64_t	dyldBaseAddress;		// base address of dyld when cache was built
40	uint64_t	codeSignatureOffset;	// file offset of code signature blob
41	uint64_t	codeSignatureSize;		// size of code signature blob (zero means to end of file)
42	uint64_t	slideInfoOffset;		// file offset of kernel slid info
43	uint64_t	slideInfoSize;			// size of kernel slid info
44	uint64_t	localSymbolsOffset;		// file offset of where local symbols are stored
45	uint64_t	localSymbolsSize;		// size of local symbols information
46	uint8_t		uuid[16];				// unique value for each shared cache file
47};
48
49struct dyld_cache_mapping_info {
50	uint64_t	address;
51	uint64_t	size;
52	uint64_t	fileOffset;
53	uint32_t	maxProt;
54	uint32_t	initProt;
55};
56
57struct dyld_cache_image_info
58{
59	uint64_t	address;
60	uint64_t	modTime;
61	uint64_t	inode;
62	uint32_t	pathFileOffset;
63	uint32_t	pad;
64};
65
66struct dyld_cache_slide_info
67{
68	uint32_t	version;		// currently 1
69	uint32_t	toc_offset;
70	uint32_t	toc_count;
71	uint32_t	entries_offset;
72	uint32_t	entries_count;
73	uint32_t	entries_size;  // currently 128
74	// uint16_t toc[toc_count];
75	// entrybitmap entries[entries_count];
76};
77
78
79struct dyld_cache_local_symbols_info
80{
81	uint32_t	nlistOffset;		// offset into this chunk of nlist entries
82	uint32_t	nlistCount;			// count of nlist entries
83	uint32_t	stringsOffset;		// offset into this chunk of string pool
84	uint32_t	stringsSize;		// byte count of string pool
85	uint32_t	entriesOffset;		// offset into this chunk of array of dyld_cache_local_symbols_entry
86	uint32_t	entriesCount;		// number of elements in dyld_cache_local_symbols_entry array
87};
88
89struct dyld_cache_local_symbols_entry
90{
91	uint32_t	dylibOffset;		// offset in cache file of start of dylib
92	uint32_t	nlistStartIndex;	// start index of locals for this dylib
93	uint32_t	nlistCount;			// number of local symbols for this dylib
94};
95
96
97
98#define MACOSX_DYLD_SHARED_CACHE_DIR	"/var/db/dyld/"
99#define IPHONE_DYLD_SHARED_CACHE_DIR	"/System/Library/Caches/com.apple.dyld/"
100#define DYLD_SHARED_CACHE_BASE_NAME		"dyld_shared_cache_"
101
102
103
104#endif // __DYLD_CACHE_FORMAT__
105
106
107