launch-cache/dyld_cache_format.h

   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@
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   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,
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  19  * Please see the License for the specific language governing rights and
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  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
  32 struct 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 };
  45
  46 struct dyld_cache_mapping_info {
  47         uint64_t        address;
  48         uint64_t        size;
  49         uint64_t        fileOffset;
  50         uint32_t        maxProt;
  51         uint32_t        initProt;
  52 };
  53
  54 struct dyld_cache_image_info
  55 {
  56         uint64_t        address;
  57         uint64_t        modTime;
  58         uint64_t        inode;
  59         uint32_t        pathFileOffset;
  60         uint32_t        pad;
  61 };
  62
  63 struct dyld_cache_slide_info
  64 {
  65         uint32_t        version;                // currently 1
  66         uint32_t        toc_offset;
  67         uint32_t        toc_count;
  68         uint32_t        entries_offset;
  69         uint32_t        entries_count;
  70         uint32_t        entries_size;  // currently 128
  71         // uint16_t toc[toc_count];
  72         // entrybitmap entries[entries_count];
  73 };
  74
  75
  76
  77 #define MACOSX_DYLD_SHARED_CACHE_DIR    "/var/db/dyld/"
  78 #define IPHONE_DYLD_SHARED_CACHE_DIR    "/System/Library/Caches/com.apple.dyld/"
  79 #define DYLD_SHARED_CACHE_BASE_NAME             "dyld_shared_cache_"
  80
  81
  82
  83 #endif // __DYLD_CACHE_FORMAT__
  84
  85