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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 | /* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- * * Copyright (c) 2004-2005 Apple Computer, 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 "ImageLoader.h" #include "mach-o/dyld_images.h" struct sf_mapping; struct _shared_region_mapping_np; // // ImageLoaderMachO is the concrete subclass of ImageLoader which loads mach-o format files. // The class is written to be 64-bit clean and support both 32-bit and 64-bit executables in // mach-o. // // class ImageLoaderMachO : public ImageLoader { public: ImageLoaderMachO(const char* path, int fd, const uint8_t firstPage[4096], uint64_t offset, uint64_t len, const struct stat& info, const LinkContext& context); ImageLoaderMachO(const char* moduleName, const struct mach_header* mh, uint64_t len, const LinkContext& context); ImageLoaderMachO(const struct mach_header* mh, const char* path, const struct stat& info, const LinkContext& context); ImageLoaderMachO(const struct mach_header* executableHeader, uintptr_t executableSlide, const char* path, const LinkContext& context); virtual ~ImageLoaderMachO(); const char* getInstallPath() const; virtual void* getMain() 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, const void* hint, bool searchReExports, const ImageLoader** foundIn) const; virtual uintptr_t getExportedSymbolAddress(const Symbol* sym, const LinkContext& context, const ImageLoader* requestor) 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 geImportedSymbolInfo(const Symbol* sym) const; virtual const char* getImportedSymbolName(const Symbol* sym) const; virtual bool isBundle() const; virtual bool isDylib() const; virtual bool forceFlat() const; virtual uintptr_t doBindLazySymbol(uintptr_t* lazyPointer, const LinkContext& context); virtual void doTermination(const LinkContext& context); #if IMAGE_NOTIFY_SUPPORT virtual void doNotification(enum dyld_image_mode mode, uint32_t infoCount, const struct dyld_image_info info[]); #endif virtual bool needsInitialization(); #if IMAGE_NOTIFY_SUPPORT virtual bool hasImageNotification(); #endif virtual bool getSectionContent(const char* segmentName, const char* sectionName, void** start, size_t* length); virtual bool findSection(const void* imageInterior, const char** segmentName, const char** sectionName, size_t* sectionOffset); virtual bool usablePrebinding(const LinkContext& context) const; static void printStatistics(unsigned int imageCount); protected: ImageLoaderMachO(const ImageLoaderMachO&); void operator=(const ImageLoaderMachO&); virtual uint32_t doGetDependentLibraryCount(); virtual void doGetDependentLibraries(DependentLibraryInfo libs[]); virtual LibraryInfo doGetLibraryInfo(); virtual void getRPaths(const LinkContext& context, std::vector<const char*>&) const; virtual void doRebase(const LinkContext& context); virtual void doBind(const LinkContext& context, bool forceLazysBound); virtual void doBindJustLazies(const LinkContext& context); virtual void doUpdateMappingPermissions(const LinkContext& context); virtual void doInitialization(const LinkContext& context); virtual void doGetDOFSections(const LinkContext& context, std::vector<ImageLoader::DOFInfo>& dofs); virtual bool needsTermination(); virtual void instantiateSegments(const uint8_t* fileData); virtual bool segmentsMustSlideTogether() const; virtual bool segmentsCanSlide() const; virtual void setSlide(intptr_t slide); virtual bool usesTwoLevelNameSpace() const; virtual bool isSubframeworkOf(const LinkContext& context, const ImageLoader* image) const; virtual bool hasSubLibrary(const LinkContext& context, const ImageLoader* child) const; virtual bool isPrebindable() const; virtual SegmentIterator beginSegments() const; virtual SegmentIterator endSegments() const; #if SPLIT_SEG_DYLIB_SUPPORT virtual void mapSegments(int fd, uint64_t offsetInFat, uint64_t lenInFat, uint64_t fileLen, const LinkContext& context); #endif private: friend class SegmentMachO; void init(); void parseLoadCmds(); uintptr_t bindIndirectSymbol(uintptr_t* ptrToBind, const struct macho_section* sect, const char* symbolName, uintptr_t targetAddr, const ImageLoader* targetImage, const LinkContext& context); void doBindIndirectSymbolPointers(const LinkContext& context, bool bindNonLazys, bool bindLazys, bool onlyCoalescedSymbols); void doBindExternalRelocations(const LinkContext& context, bool onlyCoalescedSymbols); uintptr_t resolveUndefined(const LinkContext& context, const struct macho_nlist* symbol, bool twoLevel, const ImageLoader **foundIn); uintptr_t getRelocBase(); uintptr_t getFirstWritableSegmentAddress(); void resetPreboundLazyPointers(const LinkContext& context, uintptr_t relocBase); void doImageInit(const LinkContext& context); void doModInitFunctions(const LinkContext& context); void setupLazyPointerHandler(const LinkContext& context); void lookupProgramVars(const LinkContext& context) const; #if SPLIT_SEG_DYLIB_SUPPORT unsigned int getExtraZeroFillEntriesCount(); void initMappingTable(uint64_t offsetInFat, _shared_region_mapping_np *mappingTable); int sharedRegionMapFilePrivateOutside(int fd, uint64_t offsetInFat, uint64_t lenInFat, uint64_t fileLen, const LinkContext& context); #endif #if SPLIT_SEG_SHARED_REGION_SUPPORT int sharedRegionLoadFile(int fd, uint64_t offsetInFat, uint64_t lenInFat, uint64_t fileLen, const LinkContext& context); int sharedRegionMapFile(int fd, uint64_t offsetInFat, uint64_t lenInFat, uint64_t fileLen, const LinkContext& context); int sharedRegionMakePrivate(const LinkContext& context); int sharedRegionMapFilePrivate(int fd, uint64_t offsetInFat, uint64_t lenInFat, uint64_t fileLen, const LinkContext& context, bool usemmap); void initMappingTable(uint64_t offsetInFat, sf_mapping *mappingTable, uintptr_t baseAddress); #endif bool needsCoalescing() const; bool isAddrInSection(uintptr_t addr, uint8_t sectionIndex); void adjustSegments(); uintptr_t getSymbolAddress(const struct macho_nlist* sym, const ImageLoader* requestor, const LinkContext& context) const; void preFetch(int fd, uint64_t offsetInFat, const LinkContext& context); #if __i386__ void makeImportSegmentWritable(const LinkContext& context); void makeImportSegmentReadOnly(const LinkContext& context); #endif static bool symbolRequiresCoalescing(const struct macho_nlist* symbol); static uintptr_t bindLazySymbol(const mach_header*, uintptr_t* lazyPointer); const struct macho_nlist* binarySearch(const char* key, const char stringPool[], const struct macho_nlist symbols[], uint32_t symbolCount) const; const struct macho_nlist* binarySearchWithToc(const char* key, const char stringPool[], const struct macho_nlist symbols[], const struct dylib_table_of_contents toc[], uint32_t symbolCount, uint32_t hintIndex) const; const uint8_t* fMachOData; const uint8_t* fLinkEditBase; // add any internal "offset" to this to get actual address const struct macho_nlist* fSymbolTable; const char* fStrings; const struct dysymtab_command* fDynamicInfo; uintptr_t fSlide; const struct twolevel_hints_command* fTwoLevelHints; const struct dylib_command* fDylibID; class SegmentMachO* fSegmentsArray; #if TEXT_RELOC_SUPPORT class SegmentMachO* fTextSegmentWithFixups; // NULL unless __TEXT segment has fixups #endif #if __i386__ class SegmentMachO* fReadOnlyImportSegment; // NULL unless __IMPORT segment built with -read_only_stubs static uint32_t fgReadOnlyImportSpinLock; #endif uint32_t fSegmentsArrayCount : 8, fIsSplitSeg : 1, fInSharedCache : 1, #if __ppc64__ f4GBWritable : 1, #endif fHasSubLibraries : 1, fHasSubUmbrella : 1, fInUmbrella : 1, fHasDOFSections : 1, fHasDashInit : 1, fHasInitializers : 1, #if IMAGE_NOTIFY_SUPPORT fHasImageNotifySection : 1, #endif fHasTerminators : 1; static uint32_t fgHintedBinaryTreeSearchs; static uint32_t fgUnhintedBinaryTreeSearchs; static uint32_t fgCountOfImagesWithWeakExports; }; class SegmentMachO : public Segment { public: SegmentMachO(const struct macho_segment_command* cmd); virtual ~SegmentMachO(); virtual const char* getName(); virtual uintptr_t getSize(); virtual uintptr_t getFileSize(); virtual uintptr_t getFileOffset(); virtual bool readable(); virtual bool writeable(); virtual bool executable(); virtual bool unaccessible(); virtual uintptr_t getActualLoadAddress(const ImageLoader*); virtual uintptr_t getPreferredLoadAddress(); virtual void unmap(const ImageLoader*); virtual Segment* next(Segment*); #if TEXT_RELOC_SUPPORT virtual bool hasFixUps(); #endif #if __i386__ virtual bool readOnlyImportStubs(); #endif protected: virtual bool hasPreferredLoadAddress(); private: SegmentMachO(const SegmentMachO&); void operator=(const SegmentMachO&); void adjust(const struct macho_segment_command* cmd); friend class ImageLoaderMachO; const struct macho_segment_command* fSegmentLoadCommand; }; #endif // __IMAGELOADERMACHO__ |