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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | /* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- * * Copyright (c) 2003-2010 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #ifndef _CACHE_PATCHING_H_ #define _CACHE_PATCHING_H_ #include "MachOLoaded.h" // // MARK: --- V1 patching. This is for old caches, before Large/Split caches --- // struct dyld_cache_patch_info_v1 { uint64_t patchTableArrayAddr; // (unslid) address of array for dyld_cache_image_patches for each image uint64_t patchTableArrayCount; // count of patch table entries uint64_t patchExportArrayAddr; // (unslid) address of array for patch exports for each image uint64_t patchExportArrayCount; // count of patch exports entries uint64_t patchLocationArrayAddr; // (unslid) address of array for patch locations for each patch uint64_t patchLocationArrayCount;// count of patch location entries uint64_t patchExportNamesAddr; // blob of strings of export names for patches uint64_t patchExportNamesSize; // size of string blob of export names for patches }; struct dyld_cache_image_patches_v1 { uint32_t patchExportsStartIndex; uint32_t patchExportsCount; }; struct dyld_cache_patchable_export_v1 { uint32_t cacheOffsetOfImpl; uint32_t patchLocationsStartIndex; uint32_t patchLocationsCount; uint32_t exportNameOffset; }; struct dyld_cache_patchable_location_v1 { uint32_t cacheOffset; uint64_t high7 : 7, addend : 5, // 0..31 authenticated : 1, usesAddressDiversity : 1, key : 2, discriminator : 16; uint64_t getAddend() const { uint64_t unsingedAddend = addend; int64_t signedAddend = (int64_t)unsingedAddend; signedAddend = (signedAddend << 52) >> 52; return (uint64_t)signedAddend; } }; // // MARK: --- V2 patching. This is for Large/Split caches and newer --- // struct dyld_cache_patch_info_v2 { uint32_t patchTableVersion; // == 2 uint32_t patchLocationVersion; // == 0 for now uint64_t patchTableArrayAddr; // (unslid) address of array for dyld_cache_image_patches_v2 for each image uint64_t patchTableArrayCount; // count of patch table entries uint64_t patchImageExportsArrayAddr; // (unslid) address of array for dyld_cache_image_export_v2 for each image uint64_t patchImageExportsArrayCount; // count of patch table entries uint64_t patchClientsArrayAddr; // (unslid) address of array for dyld_cache_image_clients_v2 for each image uint64_t patchClientsArrayCount; // count of patch clients entries uint64_t patchClientExportsArrayAddr; // (unslid) address of array for patch exports for each client image uint64_t patchClientExportsArrayCount; // count of patch exports entries uint64_t patchLocationArrayAddr; // (unslid) address of array for patch locations for each patch uint64_t patchLocationArrayCount; // count of patch location entries uint64_t patchExportNamesAddr; // blob of strings of export names for patches uint64_t patchExportNamesSize; // size of string blob of export names for patches }; struct dyld_cache_image_patches_v2 { uint32_t patchClientsStartIndex; uint32_t patchClientsCount; uint32_t patchExportsStartIndex; // Points to dyld_cache_image_export_v2[] uint32_t patchExportsCount; }; struct dyld_cache_image_export_v2 { uint32_t dylibOffsetOfImpl; // Offset from the dylib we used to find a dyld_cache_image_patches_v2 uint32_t exportNameOffset; }; struct dyld_cache_image_clients_v2 { uint32_t clientDylibIndex; uint32_t patchExportsStartIndex; // Points to dyld_cache_patchable_export_v2[] uint32_t patchExportsCount; }; struct dyld_cache_patchable_export_v2 { uint32_t imageExportIndex; // Points to dyld_cache_image_export_v2 uint32_t patchLocationsStartIndex; // Points to dyld_cache_patchable_location_v2[] uint32_t patchLocationsCount; }; struct dyld_cache_patchable_location_v2 { uint32_t dylibOffsetOfUse; // Offset from the dylib we used to get a dyld_cache_image_clients_v2 uint32_t high7 : 7, addend : 5, // 0..31 authenticated : 1, usesAddressDiversity : 1, key : 2, discriminator : 16; uint64_t getAddend() const { uint64_t unsingedAddend = addend; int64_t signedAddend = (int64_t)unsingedAddend; signedAddend = (signedAddend << 52) >> 52; return (uint64_t)signedAddend; } }; #endif /* _CACHE_PATCHING_H_ */ |