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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 | /* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- * * Copyright (c) 2004-2009 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 __IMAGELOADERMACHO__ #define __IMAGELOADERMACHO__ #include <stdint.h> #include <mach-o/loader.h> #include <mach-o/nlist.h> #include <uuid/uuid.h> #if __has_feature(ptrauth_calls) #include <ptrauth.h> #endif #include "ImageLoader.h" #include "mach-o/dyld_images.h" #define BIND_TYPE_THREADED_BIND 100 #define BIND_TYPE_THREADED_REBASE 102 // // ImageLoaderMachO is a subclass of ImageLoader which loads mach-o format files. // // class ImageLoaderMachO : public ImageLoader { public: static ImageLoader* instantiateMainExecutable(const macho_header* mh, uintptr_t slide, const char* path, const LinkContext& context); static ImageLoader* instantiateFromFile(const char* path, int fd, const uint8_t firstPages[], size_t firstPagesSize, uint64_t offsetInFat, uint64_t lenInFat, const struct stat& info, const LinkContext& context); static ImageLoader* instantiateFromCache(const macho_header* mh, const char* path, long slide, const struct stat& info, const LinkContext& context); static ImageLoader* instantiateFromMemory(const char* moduleName, const macho_header* mh, uint64_t len, const LinkContext& context); bool inSharedCache() const { return fInSharedCache; } void disableCoverageCheck() { fCoveredCodeLength = UINT64_MAX; } const char* getInstallPath() const; virtual void* getEntryFromLC_UNIXTHREAD() const; virtual void* getEntryFromLC_MAIN() const; virtual const struct mach_header* machHeader() const; virtual uintptr_t getSlide() const; virtual const void* getEnd() const; virtual bool hasCoalescedExports() const; virtual const Symbol* findExportedSymbol(const char* name, bool searchReExports, const char* thisPath, const ImageLoader** foundIn) const; virtual uintptr_t getExportedSymbolAddress(const Symbol* sym, const LinkContext& context, const ImageLoader* requestor, bool runResolver, const char*) const; virtual DefinitionFlags getExportedSymbolInfo(const Symbol* sym) const; virtual const char* getExportedSymbolName(const Symbol* sym) const; virtual uint32_t getExportedSymbolCount() const; virtual const Symbol* getIndexedExportedSymbol(uint32_t index) const; virtual uint32_t getImportedSymbolCount() const; virtual const Symbol* getIndexedImportedSymbol(uint32_t index) const; virtual ReferenceFlags getImportedSymbolInfo(const Symbol* sym) const; virtual const char* getImportedSymbolName(const Symbol* sym) const; virtual bool isBundle() const; virtual bool isDylib() const; virtual bool isExecutable() const; virtual bool isPositionIndependentExecutable() const; virtual bool forceFlat() const; virtual bool participatesInCoalescing() const; virtual const char* findClosestSymbol(const void* addr, const void** closestAddr) const = 0; virtual void initializeCoalIterator(CoalIterator&, unsigned int loadOrder, unsigned) = 0; virtual bool incrementCoalIterator(CoalIterator&) = 0; virtual uintptr_t getAddressCoalIterator(CoalIterator&, const LinkContext& contex) = 0; virtual void updateUsesCoalIterator(CoalIterator&, uintptr_t newAddr, ImageLoader* target, unsigned targetIndex, const LinkContext& context) = 0; virtual uintptr_t doBindLazySymbol(uintptr_t* lazyPointer, const LinkContext& context) = 0; virtual uintptr_t doBindFastLazySymbol(uint32_t lazyBindingInfoOffset, const LinkContext& context, void (*lock)(), void (*unlock)()) = 0; virtual void doTermination(const LinkContext& context); virtual bool needsInitialization(); virtual bool getSectionContent(const char* segmentName, const char* sectionName, void** start, size_t* length); virtual void getUnwindInfo(dyld_unwind_sections* info); virtual const struct macho_section* findSection(const void* imageInterior) const; virtual bool findSection(const void* imageInterior, const char** segmentName, const char** sectionName, size_t* sectionOffset); virtual bool usablePrebinding(const LinkContext& context) const; virtual unsigned int segmentCount() const; virtual const char* segName(unsigned int) const; virtual uintptr_t segSize(unsigned int) const; virtual uintptr_t segFileSize(unsigned int) const; virtual bool segHasTrailingZeroFill(unsigned int); virtual uintptr_t segFileOffset(unsigned int) const; virtual bool segReadable(unsigned int) const; virtual bool segWriteable(unsigned int) const; virtual bool segExecutable(unsigned int) const; virtual bool segUnaccessible(unsigned int) const; virtual bool segHasPreferredLoadAddress(unsigned int) const; virtual uintptr_t segActualLoadAddress(unsigned int) const; virtual uintptr_t segPreferredLoadAddress(unsigned int) const; virtual uintptr_t segActualEndAddress(unsigned int) const; virtual void registerInterposing(const LinkContext& context); virtual uint32_t sdkVersion() const; virtual uint32_t minOSVersion() const; virtual const char* libPath(unsigned int) const; virtual bool notifyObjC() const { return fNotifyObjC; } virtual bool overridesCachedDylib(uint32_t& num) const { num = fOverrideOfCacheImageNum; return (num != 0); } virtual void setOverridesCachedDylib(uint32_t num) { fOverrideOfCacheImageNum = num; } static void printStatisticsDetails(unsigned int imageCount, const InitializerTimingList&); static uint32_t minOSVersion(const mach_header*); static uint32_t sdkVersion(const mach_header* mh); static intptr_t computeSlide(const mach_header* mh); static bool findSection(const mach_header* mh, const char* segmentName, const char* sectionName, void** sectAddress, uintptr_t* sectSize); static const dyld_info_command* findDyldInfoLoadCommand(const mach_header* mh); static const char* findClosestSymbol(const mach_header* mh, const void* addr, const void** closestAddr); static bool getLazyBindingInfo(uint32_t& lazyBindingInfoOffset, const uint8_t* lazyInfoStart, const uint8_t* lazyInfoEnd, uint8_t* segIndex, uintptr_t* segOffset, int* ordinal, const char** symbolName, bool* doneAfterBind); static uintptr_t segPreferredAddress(const mach_header* mh, unsigned segIndex); uintptr_t imageBaseAddress() const; struct ExtraBindData { ExtraBindData() = default; explicit ExtraBindData(uint64_t d) : data(d) { } union { uint64_t data = 0; }; bool operator==(const ExtraBindData& other) const { return this->data == other.data; } bool operator!=(const ExtraBindData& other) const { return !(*this == other); } bool operator<(const ExtraBindData& other) const { return data < other.data; } }; static uintptr_t bindLocation(const LinkContext& context, uintptr_t baseVMAddress, uintptr_t location, uintptr_t value, uint8_t type, const char* symbolName, intptr_t addend, const char* inPath, const char* toPath, const char* msg, ExtraBindData *extraBindData, uintptr_t fSlide); virtual void rebase(const LinkContext& context, uintptr_t slide) = 0; protected: ImageLoaderMachO(const ImageLoaderMachO&); ImageLoaderMachO(const macho_header* mh, const char* path, unsigned int segCount, uint32_t segOffsets[], unsigned int libCount); virtual ~ImageLoaderMachO() {} void operator=(const ImageLoaderMachO&); virtual void setDyldInfo(const struct dyld_info_command*) = 0; virtual void setSymbolTableInfo(const macho_nlist*, const char*, const dysymtab_command*) = 0; virtual bool isSubframeworkOf(const LinkContext& context, const ImageLoader* image) const = 0; virtual bool hasSubLibrary(const LinkContext& context, const ImageLoader* child) const = 0; virtual uint32_t* segmentCommandOffsets() const = 0; virtual const ImageLoader::Symbol* findShallowExportedSymbol(const char* name, const ImageLoader** foundIn) const = 0; virtual bool containsSymbol(const void* addr) const = 0; virtual uintptr_t exportedSymbolAddress(const LinkContext& context, const Symbol* symbol, const ImageLoader* requestor, bool runResolver) const = 0; virtual bool exportedSymbolIsWeakDefintion(const Symbol* symbol) const = 0; virtual const char* exportedSymbolName(const Symbol* symbol) const = 0; virtual unsigned int exportedSymbolCount() const = 0; virtual const ImageLoader::Symbol* exportedSymbolIndexed(unsigned int) const = 0; virtual unsigned int importedSymbolCount() const = 0; virtual const ImageLoader::Symbol* importedSymbolIndexed(unsigned int) const = 0; virtual const char* importedSymbolName(const Symbol* symbol) const = 0; #if PREBOUND_IMAGE_SUPPORT virtual void resetPreboundLazyPointers(const LinkContext& context) = 0; #endif virtual void doGetDependentLibraries(DependentLibraryInfo libs[]); virtual LibraryInfo doGetLibraryInfo(const LibraryInfo& requestorInfo); virtual void getRPaths(const LinkContext& context, std::vector<const char*>&) const; virtual bool getUUID(uuid_t) const; virtual void doRebase(const LinkContext& context); virtual void doBind(const LinkContext& context, bool forceLazysBound) = 0; virtual void doBindJustLazies(const LinkContext& context) = 0; virtual bool doInitialization(const LinkContext& context); virtual void doGetDOFSections(const LinkContext& context, std::vector<ImageLoader::DOFInfo>& dofs); virtual bool needsTermination(); virtual bool segmentsMustSlideTogether() const; virtual bool segmentsCanSlide() const; virtual void setSlide(intptr_t slide); virtual bool usesTwoLevelNameSpace() const; virtual bool isPrebindable() const; protected: void destroy(); static void sniffLoadCommands(const macho_header* mh, const char* path, bool inCache, bool* compressed, unsigned int* segCount, unsigned int* libCount, const LinkContext& context, const linkedit_data_command** codeSigCmd, const encryption_info_command** encryptCmd); static bool needsAddedLibSystemDepency(unsigned int libCount, const macho_header* mh); void loadCodeSignature(const struct linkedit_data_command* codeSigCmd, int fd, uint64_t offsetInFatFile, const LinkContext& context); void validateFirstPages(const struct linkedit_data_command* codeSigCmd, int fd, const uint8_t *fileData, size_t lenFileData, off_t offsetInFat, const LinkContext& context); const struct macho_segment_command* segLoadCommand(unsigned int segIndex) const; void parseLoadCmds(const ImageLoader::LinkContext& context); int crashIfInvalidCodeSignature(); bool segHasRebaseFixUps(unsigned int) const; bool segHasBindFixUps(unsigned int) const; void segProtect(unsigned int segIndex, const ImageLoader::LinkContext& context); void segMakeWritable(unsigned int segIndex, const ImageLoader::LinkContext& context); #if __i386__ bool segIsReadOnlyImport(unsigned int) const; #endif intptr_t assignSegmentAddresses(const LinkContext& context); uintptr_t reserveAnAddressRange(size_t length, const ImageLoader::LinkContext& context); bool reserveAddressRange(uintptr_t start, size_t length); void mapSegments(int fd, uint64_t offsetInFat, uint64_t lenInFat, uint64_t fileLen, const LinkContext& context); void mapSegments(const void* memoryImage, uint64_t imageLen, const LinkContext& context); void UnmapSegments(); void __attribute__((noreturn)) throwSymbolNotFound(const LinkContext& context, const char* symbol, const char* referencedFrom, const char* fromVersMismatch, const char* expectedIn); void doImageInit(const LinkContext& context); void doModInitFunctions(const LinkContext& context); void setupLazyPointerHandler(const LinkContext& context); void lookupProgramVars(const LinkContext& context) const; void makeTextSegmentWritable(const LinkContext& context, bool writeable); void preFetchDATA(int fd, uint64_t offsetInFat, const LinkContext& context); void doInterpose(const LinkContext& context) = 0; bool hasReferencesToWeakSymbols() const; uintptr_t getSymbolAddress(const Symbol* sym, const ImageLoader* requestor, const LinkContext& context, bool runResolver) const; static uintptr_t bindLazySymbol(const mach_header*, uintptr_t* lazyPointer); protected: uint64_t fCoveredCodeLength; const uint8_t* fMachOData; const uint8_t* fLinkEditBase; // add any internal "offset" to this to get mapped address uintptr_t fSlide; uint32_t fEHFrameSectionOffset; uint32_t fUnwindInfoSectionOffset; uint32_t fDylibIDOffset; uint32_t fSegmentsCount : 8, fIsSplitSeg : 1, fInSharedCache : 1, #if TEXT_RELOC_SUPPORT fTextSegmentRebases : 1, fTextSegmentBinds : 1, #endif #if __i386__ fReadOnlyImportSegment : 1, #endif fHasSubLibraries : 1, fHasSubUmbrella : 1, fInUmbrella : 1, fHasDOFSections : 1, fHasDashInit : 1, fHasInitializers : 1, fHasTerminators : 1, fNotifyObjC : 1, fRetainForObjC : 1, fRegisteredAsRequiresCoalescing : 1, // <rdar://problem/7886402> Loading MH_DYLIB_STUB causing coalescable miscount fOverrideOfCacheImageNum : 12; static uint32_t fgSymbolTableBinarySearchs; }; #endif // __IMAGELOADERMACHO__ |