File: | tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp |
Warning: | line 1023, column 5 Value stored to 'p' is never read |
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1 | //===- lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp ---------===// |
2 | // |
3 | // The LLVM Linker |
4 | // |
5 | // This file is distributed under the University of Illinois Open Source |
6 | // License. See LICENSE.TXT for details. |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | |
10 | /// |
11 | /// \file For mach-o object files, this implementation converts normalized |
12 | /// mach-o in memory to mach-o binary on disk. |
13 | /// |
14 | /// +---------------+ |
15 | /// | binary mach-o | |
16 | /// +---------------+ |
17 | /// ^ |
18 | /// | |
19 | /// | |
20 | /// +------------+ |
21 | /// | normalized | |
22 | /// +------------+ |
23 | |
24 | #include "MachONormalizedFile.h" |
25 | #include "MachONormalizedFileBinaryUtils.h" |
26 | #include "lld/Common/LLVM.h" |
27 | #include "lld/Core/Error.h" |
28 | #include "llvm/ADT/SmallString.h" |
29 | #include "llvm/ADT/SmallVector.h" |
30 | #include "llvm/ADT/StringRef.h" |
31 | #include "llvm/ADT/ilist.h" |
32 | #include "llvm/ADT/ilist_node.h" |
33 | #include "llvm/BinaryFormat/MachO.h" |
34 | #include "llvm/Support/Casting.h" |
35 | #include "llvm/Support/Debug.h" |
36 | #include "llvm/Support/Errc.h" |
37 | #include "llvm/Support/ErrorHandling.h" |
38 | #include "llvm/Support/FileOutputBuffer.h" |
39 | #include "llvm/Support/Format.h" |
40 | #include "llvm/Support/Host.h" |
41 | #include "llvm/Support/MemoryBuffer.h" |
42 | #include "llvm/Support/raw_ostream.h" |
43 | #include <functional> |
44 | #include <list> |
45 | #include <map> |
46 | #include <system_error> |
47 | |
48 | using namespace llvm::MachO; |
49 | |
50 | namespace lld { |
51 | namespace mach_o { |
52 | namespace normalized { |
53 | |
54 | struct TrieNode; // Forward declaration. |
55 | |
56 | struct TrieEdge : public llvm::ilist_node<TrieEdge> { |
57 | TrieEdge(StringRef s, TrieNode *node) : _subString(s), _child(node) {} |
58 | |
59 | StringRef _subString; |
60 | struct TrieNode *_child; |
61 | }; |
62 | |
63 | } // namespace normalized |
64 | } // namespace mach_o |
65 | } // namespace lld |
66 | |
67 | |
68 | namespace llvm { |
69 | using lld::mach_o::normalized::TrieEdge; |
70 | template <> |
71 | struct ilist_alloc_traits<TrieEdge> : ilist_noalloc_traits<TrieEdge> {}; |
72 | } // namespace llvm |
73 | |
74 | |
75 | namespace lld { |
76 | namespace mach_o { |
77 | namespace normalized { |
78 | |
79 | struct TrieNode { |
80 | typedef llvm::ilist<TrieEdge> TrieEdgeList; |
81 | |
82 | TrieNode(StringRef s) |
83 | : _cummulativeString(s), _address(0), _flags(0), _other(0), |
84 | _trieOffset(0), _hasExportInfo(false) {} |
85 | ~TrieNode() = default; |
86 | |
87 | void addSymbol(const Export &entry, BumpPtrAllocator &allocator, |
88 | std::vector<TrieNode *> &allNodes); |
89 | |
90 | void addOrderedNodes(const Export &entry, |
91 | std::vector<TrieNode *> &allNodes); |
92 | bool updateOffset(uint32_t &offset); |
93 | void appendToByteBuffer(ByteBuffer &out); |
94 | |
95 | private: |
96 | StringRef _cummulativeString; |
97 | TrieEdgeList _children; |
98 | uint64_t _address; |
99 | uint64_t _flags; |
100 | uint64_t _other; |
101 | StringRef _importedName; |
102 | uint32_t _trieOffset; |
103 | bool _hasExportInfo; |
104 | bool _ordered = false; |
105 | }; |
106 | |
107 | /// Utility class for writing a mach-o binary file given an in-memory |
108 | /// normalized file. |
109 | class MachOFileLayout { |
110 | public: |
111 | /// All layout computation is done in the constructor. |
112 | MachOFileLayout(const NormalizedFile &file); |
113 | |
114 | /// Returns the final file size as computed in the constructor. |
115 | size_t size() const; |
116 | |
117 | // Returns size of the mach_header and load commands. |
118 | size_t headerAndLoadCommandsSize() const; |
119 | |
120 | /// Writes the normalized file as a binary mach-o file to the specified |
121 | /// path. This does not have a stream interface because the generated |
122 | /// file may need the 'x' bit set. |
123 | llvm::Error writeBinary(StringRef path); |
124 | |
125 | private: |
126 | uint32_t loadCommandsSize(uint32_t &count); |
127 | void buildFileOffsets(); |
128 | void writeMachHeader(); |
129 | llvm::Error writeLoadCommands(); |
130 | void writeSectionContent(); |
131 | void writeRelocations(); |
132 | void writeSymbolTable(); |
133 | void writeRebaseInfo(); |
134 | void writeBindingInfo(); |
135 | void writeLazyBindingInfo(); |
136 | void writeExportInfo(); |
137 | void writeFunctionStartsInfo(); |
138 | void writeDataInCodeInfo(); |
139 | void writeLinkEditContent(); |
140 | void buildLinkEditInfo(); |
141 | void buildRebaseInfo(); |
142 | void buildBindInfo(); |
143 | void buildLazyBindInfo(); |
144 | void buildExportTrie(); |
145 | void computeFunctionStartsSize(); |
146 | void computeDataInCodeSize(); |
147 | void computeSymbolTableSizes(); |
148 | void buildSectionRelocations(); |
149 | void appendSymbols(const std::vector<Symbol> &symbols, |
150 | uint32_t &symOffset, uint32_t &strOffset); |
151 | uint32_t indirectSymbolIndex(const Section §, uint32_t &index); |
152 | uint32_t indirectSymbolElementSize(const Section §); |
153 | |
154 | // For use as template parameter to load command methods. |
155 | struct MachO64Trait { |
156 | typedef llvm::MachO::segment_command_64 command; |
157 | typedef llvm::MachO::section_64 section; |
158 | enum { LC = llvm::MachO::LC_SEGMENT_64 }; |
159 | }; |
160 | |
161 | // For use as template parameter to load command methods. |
162 | struct MachO32Trait { |
163 | typedef llvm::MachO::segment_command command; |
164 | typedef llvm::MachO::section section; |
165 | enum { LC = llvm::MachO::LC_SEGMENT }; |
166 | }; |
167 | |
168 | template <typename T> |
169 | llvm::Error writeSingleSegmentLoadCommand(uint8_t *&lc); |
170 | template <typename T> llvm::Error writeSegmentLoadCommands(uint8_t *&lc); |
171 | |
172 | uint32_t pointerAlign(uint32_t value); |
173 | static StringRef dyldPath(); |
174 | |
175 | struct SegExtraInfo { |
176 | uint32_t fileOffset; |
177 | uint32_t fileSize; |
178 | std::vector<const Section*> sections; |
179 | }; |
180 | typedef std::map<const Segment*, SegExtraInfo> SegMap; |
181 | struct SectionExtraInfo { |
182 | uint32_t fileOffset; |
183 | }; |
184 | typedef std::map<const Section*, SectionExtraInfo> SectionMap; |
185 | |
186 | const NormalizedFile &_file; |
187 | std::error_code _ec; |
188 | uint8_t *_buffer; |
189 | const bool _is64; |
190 | const bool _swap; |
191 | const bool _bigEndianArch; |
192 | uint64_t _seg1addr; |
193 | uint32_t _startOfLoadCommands; |
194 | uint32_t _countOfLoadCommands; |
195 | uint32_t _endOfLoadCommands; |
196 | uint32_t _startOfRelocations; |
197 | uint32_t _startOfFunctionStarts; |
198 | uint32_t _startOfDataInCode; |
199 | uint32_t _startOfSymbols; |
200 | uint32_t _startOfIndirectSymbols; |
201 | uint32_t _startOfSymbolStrings; |
202 | uint32_t _endOfSymbolStrings; |
203 | uint32_t _symbolTableLocalsStartIndex; |
204 | uint32_t _symbolTableGlobalsStartIndex; |
205 | uint32_t _symbolTableUndefinesStartIndex; |
206 | uint32_t _symbolStringPoolSize; |
207 | uint32_t _symbolTableSize; |
208 | uint32_t _functionStartsSize; |
209 | uint32_t _dataInCodeSize; |
210 | uint32_t _indirectSymbolTableCount; |
211 | // Used in object file creation only |
212 | uint32_t _startOfSectionsContent; |
213 | uint32_t _endOfSectionsContent; |
214 | // Used in final linked image only |
215 | uint32_t _startOfLinkEdit; |
216 | uint32_t _startOfRebaseInfo; |
217 | uint32_t _endOfRebaseInfo; |
218 | uint32_t _startOfBindingInfo; |
219 | uint32_t _endOfBindingInfo; |
220 | uint32_t _startOfLazyBindingInfo; |
221 | uint32_t _endOfLazyBindingInfo; |
222 | uint32_t _startOfExportTrie; |
223 | uint32_t _endOfExportTrie; |
224 | uint32_t _endOfLinkEdit; |
225 | uint64_t _addressOfLinkEdit; |
226 | SegMap _segInfo; |
227 | SectionMap _sectInfo; |
228 | ByteBuffer _rebaseInfo; |
229 | ByteBuffer _bindingInfo; |
230 | ByteBuffer _lazyBindingInfo; |
231 | ByteBuffer _weakBindingInfo; |
232 | ByteBuffer _exportTrie; |
233 | }; |
234 | |
235 | size_t headerAndLoadCommandsSize(const NormalizedFile &file) { |
236 | MachOFileLayout layout(file); |
237 | return layout.headerAndLoadCommandsSize(); |
238 | } |
239 | |
240 | StringRef MachOFileLayout::dyldPath() { |
241 | return "/usr/lib/dyld"; |
242 | } |
243 | |
244 | uint32_t MachOFileLayout::pointerAlign(uint32_t value) { |
245 | return llvm::alignTo(value, _is64 ? 8 : 4); |
246 | } |
247 | |
248 | |
249 | size_t MachOFileLayout::headerAndLoadCommandsSize() const { |
250 | return _endOfLoadCommands; |
251 | } |
252 | |
253 | MachOFileLayout::MachOFileLayout(const NormalizedFile &file) |
254 | : _file(file), |
255 | _is64(MachOLinkingContext::is64Bit(file.arch)), |
256 | _swap(!MachOLinkingContext::isHostEndian(file.arch)), |
257 | _bigEndianArch(MachOLinkingContext::isBigEndian(file.arch)), |
258 | _seg1addr(INT64_MAX(9223372036854775807L)) { |
259 | _startOfLoadCommands = _is64 ? sizeof(mach_header_64) : sizeof(mach_header); |
260 | const size_t segCommandBaseSize = |
261 | (_is64 ? sizeof(segment_command_64) : sizeof(segment_command)); |
262 | const size_t sectsSize = (_is64 ? sizeof(section_64) : sizeof(section)); |
263 | if (file.fileType == llvm::MachO::MH_OBJECT) { |
264 | // object files have just one segment load command containing all sections |
265 | _endOfLoadCommands = _startOfLoadCommands |
266 | + segCommandBaseSize |
267 | + file.sections.size() * sectsSize |
268 | + sizeof(symtab_command); |
269 | _countOfLoadCommands = 2; |
270 | if (file.hasMinVersionLoadCommand) { |
271 | _endOfLoadCommands += sizeof(version_min_command); |
272 | _countOfLoadCommands++; |
273 | } |
274 | if (!_file.functionStarts.empty()) { |
275 | _endOfLoadCommands += sizeof(linkedit_data_command); |
276 | _countOfLoadCommands++; |
277 | } |
278 | if (_file.generateDataInCodeLoadCommand) { |
279 | _endOfLoadCommands += sizeof(linkedit_data_command); |
280 | _countOfLoadCommands++; |
281 | } |
282 | // Assign file offsets to each section. |
283 | _startOfSectionsContent = _endOfLoadCommands; |
284 | unsigned relocCount = 0; |
285 | uint64_t offset = _startOfSectionsContent; |
286 | for (const Section § : file.sections) { |
287 | if (isZeroFillSection(sect.type)) |
288 | _sectInfo[§].fileOffset = 0; |
289 | else { |
290 | offset = llvm::alignTo(offset, sect.alignment); |
291 | _sectInfo[§].fileOffset = offset; |
292 | offset += sect.content.size(); |
293 | } |
294 | relocCount += sect.relocations.size(); |
295 | } |
296 | _endOfSectionsContent = offset; |
297 | |
298 | computeSymbolTableSizes(); |
299 | computeFunctionStartsSize(); |
300 | computeDataInCodeSize(); |
301 | |
302 | // Align start of relocations. |
303 | _startOfRelocations = pointerAlign(_endOfSectionsContent); |
304 | _startOfFunctionStarts = _startOfRelocations + relocCount * 8; |
305 | _startOfDataInCode = _startOfFunctionStarts + _functionStartsSize; |
306 | _startOfSymbols = _startOfDataInCode + _dataInCodeSize; |
307 | // Add Indirect symbol table. |
308 | _startOfIndirectSymbols = _startOfSymbols + _symbolTableSize; |
309 | // Align start of symbol table and symbol strings. |
310 | _startOfSymbolStrings = _startOfIndirectSymbols |
311 | + pointerAlign(_indirectSymbolTableCount * sizeof(uint32_t)); |
312 | _endOfSymbolStrings = _startOfSymbolStrings |
313 | + pointerAlign(_symbolStringPoolSize); |
314 | _endOfLinkEdit = _endOfSymbolStrings; |
315 | DEBUG_WITH_TYPE("MachOFileLayout",do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
316 | llvm::dbgs() << "MachOFileLayout()\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
317 | << " startOfLoadCommands=" << _startOfLoadCommands << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
318 | << " countOfLoadCommands=" << _countOfLoadCommands << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
319 | << " endOfLoadCommands=" << _endOfLoadCommands << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
320 | << " startOfRelocations=" << _startOfRelocations << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
321 | << " startOfSymbols=" << _startOfSymbols << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
322 | << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
323 | << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
324 | << " startOfSectionsContent=" << _startOfSectionsContent << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false) |
325 | << " endOfSectionsContent=" << _endOfSectionsContent << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfRelocations=" << _startOfRelocations << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " startOfSectionsContent=" << _startOfSectionsContent << "\n" << " endOfSectionsContent=" << _endOfSectionsContent << "\n"; } } while (false); |
326 | } else { |
327 | // Final linked images have one load command per segment. |
328 | _endOfLoadCommands = _startOfLoadCommands |
329 | + loadCommandsSize(_countOfLoadCommands); |
330 | |
331 | // Assign section file offsets. |
332 | buildFileOffsets(); |
333 | buildLinkEditInfo(); |
334 | |
335 | // LINKEDIT of final linked images has in order: |
336 | // rebase info, binding info, lazy binding info, weak binding info, |
337 | // data-in-code, symbol table, indirect symbol table, symbol table strings. |
338 | _startOfRebaseInfo = _startOfLinkEdit; |
339 | _endOfRebaseInfo = _startOfRebaseInfo + _rebaseInfo.size(); |
340 | _startOfBindingInfo = _endOfRebaseInfo; |
341 | _endOfBindingInfo = _startOfBindingInfo + _bindingInfo.size(); |
342 | _startOfLazyBindingInfo = _endOfBindingInfo; |
343 | _endOfLazyBindingInfo = _startOfLazyBindingInfo + _lazyBindingInfo.size(); |
344 | _startOfExportTrie = _endOfLazyBindingInfo; |
345 | _endOfExportTrie = _startOfExportTrie + _exportTrie.size(); |
346 | _startOfFunctionStarts = _endOfExportTrie; |
347 | _startOfDataInCode = _startOfFunctionStarts + _functionStartsSize; |
348 | _startOfSymbols = _startOfDataInCode + _dataInCodeSize; |
349 | _startOfIndirectSymbols = _startOfSymbols + _symbolTableSize; |
350 | _startOfSymbolStrings = _startOfIndirectSymbols |
351 | + pointerAlign(_indirectSymbolTableCount * sizeof(uint32_t)); |
352 | _endOfSymbolStrings = _startOfSymbolStrings |
353 | + pointerAlign(_symbolStringPoolSize); |
354 | _endOfLinkEdit = _endOfSymbolStrings; |
355 | DEBUG_WITH_TYPE("MachOFileLayout",do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
356 | llvm::dbgs() << "MachOFileLayout()\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
357 | << " startOfLoadCommands=" << _startOfLoadCommands << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
358 | << " countOfLoadCommands=" << _countOfLoadCommands << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
359 | << " endOfLoadCommands=" << _endOfLoadCommands << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
360 | << " startOfLinkEdit=" << _startOfLinkEdit << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
361 | << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
362 | << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
363 | << " startOfBindingInfo=" << _startOfBindingInfo << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
364 | << " endOfBindingInfo=" << _endOfBindingInfo << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
365 | << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
366 | << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
367 | << " startOfExportTrie=" << _startOfExportTrie << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
368 | << " endOfExportTrie=" << _endOfExportTrie << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
369 | << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
370 | << " startOfDataInCode=" << _startOfDataInCode << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
371 | << " startOfSymbols=" << _startOfSymbols << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
372 | << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
373 | << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false) |
374 | << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "MachOFileLayout()\n" << " startOfLoadCommands=" << _startOfLoadCommands << "\n" << " countOfLoadCommands=" << _countOfLoadCommands << "\n" << " endOfLoadCommands=" << _endOfLoadCommands << "\n" << " startOfLinkEdit=" << _startOfLinkEdit << "\n" << " startOfRebaseInfo=" << _startOfRebaseInfo << "\n" << " endOfRebaseInfo=" << _endOfRebaseInfo << "\n" << " startOfBindingInfo=" << _startOfBindingInfo << "\n" << " endOfBindingInfo=" << _endOfBindingInfo << "\n" << " startOfLazyBindingInfo=" << _startOfLazyBindingInfo << "\n" << " endOfLazyBindingInfo=" << _endOfLazyBindingInfo << "\n" << " startOfExportTrie=" << _startOfExportTrie << "\n" << " endOfExportTrie=" << _endOfExportTrie << "\n" << " startOfFunctionStarts=" << _startOfFunctionStarts << "\n" << " startOfDataInCode=" << _startOfDataInCode << "\n" << " startOfSymbols=" << _startOfSymbols << "\n" << " startOfSymbolStrings=" << _startOfSymbolStrings << "\n" << " endOfSymbolStrings=" << _endOfSymbolStrings << "\n" << " addressOfLinkEdit=" << _addressOfLinkEdit << "\n"; } } while (false); |
375 | } |
376 | } |
377 | |
378 | uint32_t MachOFileLayout::loadCommandsSize(uint32_t &count) { |
379 | uint32_t size = 0; |
380 | count = 0; |
381 | |
382 | const size_t segCommandSize = |
383 | (_is64 ? sizeof(segment_command_64) : sizeof(segment_command)); |
384 | const size_t sectionSize = (_is64 ? sizeof(section_64) : sizeof(section)); |
385 | |
386 | // Add LC_SEGMENT for each segment. |
387 | size += _file.segments.size() * segCommandSize; |
388 | count += _file.segments.size(); |
389 | // Add section record for each section. |
390 | size += _file.sections.size() * sectionSize; |
391 | |
392 | // If creating a dylib, add LC_ID_DYLIB. |
393 | if (_file.fileType == llvm::MachO::MH_DYLIB) { |
394 | size += sizeof(dylib_command) + pointerAlign(_file.installName.size() + 1); |
395 | ++count; |
396 | } |
397 | |
398 | // Add LC_DYLD_INFO |
399 | size += sizeof(dyld_info_command); |
400 | ++count; |
401 | |
402 | // Add LC_SYMTAB |
403 | size += sizeof(symtab_command); |
404 | ++count; |
405 | |
406 | // Add LC_DYSYMTAB |
407 | if (_file.fileType != llvm::MachO::MH_PRELOAD) { |
408 | size += sizeof(dysymtab_command); |
409 | ++count; |
410 | } |
411 | |
412 | // If main executable add LC_LOAD_DYLINKER |
413 | if (_file.fileType == llvm::MachO::MH_EXECUTE) { |
414 | size += pointerAlign(sizeof(dylinker_command) + dyldPath().size()+1); |
415 | ++count; |
416 | } |
417 | |
418 | // Add LC_VERSION_MIN_MACOSX, LC_VERSION_MIN_IPHONEOS, LC_VERSION_MIN_WATCHOS, |
419 | // LC_VERSION_MIN_TVOS |
420 | if (_file.hasMinVersionLoadCommand) { |
421 | size += sizeof(version_min_command); |
422 | ++count; |
423 | } |
424 | |
425 | // Add LC_SOURCE_VERSION |
426 | size += sizeof(source_version_command); |
427 | ++count; |
428 | |
429 | // If main executable add LC_MAIN |
430 | if (_file.fileType == llvm::MachO::MH_EXECUTE) { |
431 | size += sizeof(entry_point_command); |
432 | ++count; |
433 | } |
434 | |
435 | // Add LC_LOAD_DYLIB for each dependent dylib. |
436 | for (const DependentDylib &dep : _file.dependentDylibs) { |
437 | size += sizeof(dylib_command) + pointerAlign(dep.path.size()+1); |
438 | ++count; |
439 | } |
440 | |
441 | // Add LC_RPATH |
442 | for (const StringRef &path : _file.rpaths) { |
443 | size += pointerAlign(sizeof(rpath_command) + path.size() + 1); |
444 | ++count; |
445 | } |
446 | |
447 | // Add LC_FUNCTION_STARTS if needed |
448 | if (!_file.functionStarts.empty()) { |
449 | size += sizeof(linkedit_data_command); |
450 | ++count; |
451 | } |
452 | |
453 | // Add LC_DATA_IN_CODE if requested. Note, we do encode zero length entries. |
454 | // FIXME: Zero length entries is only to match ld64. Should we change this? |
455 | if (_file.generateDataInCodeLoadCommand) { |
456 | size += sizeof(linkedit_data_command); |
457 | ++count; |
458 | } |
459 | |
460 | return size; |
461 | } |
462 | |
463 | static bool overlaps(const Segment &s1, const Segment &s2) { |
464 | if (s2.address >= s1.address+s1.size) |
465 | return false; |
466 | if (s1.address >= s2.address+s2.size) |
467 | return false; |
468 | return true; |
469 | } |
470 | |
471 | static bool overlaps(const Section &s1, const Section &s2) { |
472 | if (s2.address >= s1.address+s1.content.size()) |
473 | return false; |
474 | if (s1.address >= s2.address+s2.content.size()) |
475 | return false; |
476 | return true; |
477 | } |
478 | |
479 | void MachOFileLayout::buildFileOffsets() { |
480 | // Verify no segments overlap |
481 | for (const Segment &sg1 : _file.segments) { |
482 | for (const Segment &sg2 : _file.segments) { |
483 | if (&sg1 == &sg2) |
484 | continue; |
485 | if (overlaps(sg1,sg2)) { |
486 | _ec = make_error_code(llvm::errc::executable_format_error); |
487 | return; |
488 | } |
489 | } |
490 | } |
491 | |
492 | // Verify no sections overlap |
493 | for (const Section &s1 : _file.sections) { |
494 | for (const Section &s2 : _file.sections) { |
495 | if (&s1 == &s2) |
496 | continue; |
497 | if (overlaps(s1,s2)) { |
498 | _ec = make_error_code(llvm::errc::executable_format_error); |
499 | return; |
500 | } |
501 | } |
502 | } |
503 | |
504 | // Build side table of extra info about segments and sections. |
505 | SegExtraInfo t; |
506 | t.fileOffset = 0; |
507 | for (const Segment &sg : _file.segments) { |
508 | _segInfo[&sg] = t; |
509 | } |
510 | SectionExtraInfo t2; |
511 | t2.fileOffset = 0; |
512 | // Assign sections to segments. |
513 | for (const Section &s : _file.sections) { |
514 | _sectInfo[&s] = t2; |
515 | bool foundSegment = false; |
516 | for (const Segment &sg : _file.segments) { |
517 | if (sg.name.equals(s.segmentName)) { |
518 | if ((s.address >= sg.address) |
519 | && (s.address+s.content.size() <= sg.address+sg.size)) { |
520 | _segInfo[&sg].sections.push_back(&s); |
521 | foundSegment = true; |
522 | break; |
523 | } |
524 | } |
525 | } |
526 | if (!foundSegment) { |
527 | _ec = make_error_code(llvm::errc::executable_format_error); |
528 | return; |
529 | } |
530 | } |
531 | |
532 | // Assign file offsets. |
533 | uint32_t fileOffset = 0; |
534 | DEBUG_WITH_TYPE("MachOFileLayout",do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "buildFileOffsets()\n" ; } } while (false) |
535 | llvm::dbgs() << "buildFileOffsets()\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << "buildFileOffsets()\n" ; } } while (false); |
536 | for (const Segment &sg : _file.segments) { |
537 | _segInfo[&sg].fileOffset = fileOffset; |
538 | if ((_seg1addr == INT64_MAX(9223372036854775807L)) && sg.init_access) |
539 | _seg1addr = sg.address; |
540 | DEBUG_WITH_TYPE("MachOFileLayout",do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << " segment=" << sg.name << ", fileOffset=" << _segInfo[&sg]. fileOffset << "\n"; } } while (false) |
541 | llvm::dbgs() << " segment=" << sg.namedo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << " segment=" << sg.name << ", fileOffset=" << _segInfo[&sg]. fileOffset << "\n"; } } while (false) |
542 | << ", fileOffset=" << _segInfo[&sg].fileOffset << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << " segment=" << sg.name << ", fileOffset=" << _segInfo[&sg]. fileOffset << "\n"; } } while (false); |
543 | |
544 | uint32_t segFileSize = 0; |
545 | // A segment that is not zero-fill must use a least one page of disk space. |
546 | if (sg.init_access) |
547 | segFileSize = _file.pageSize; |
548 | for (const Section *s : _segInfo[&sg].sections) { |
549 | uint32_t sectOffset = s->address - sg.address; |
550 | uint32_t sectFileSize = |
551 | isZeroFillSection(s->type) ? 0 : s->content.size(); |
552 | segFileSize = std::max(segFileSize, sectOffset + sectFileSize); |
553 | |
554 | _sectInfo[s].fileOffset = _segInfo[&sg].fileOffset + sectOffset; |
555 | DEBUG_WITH_TYPE("MachOFileLayout",do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << " section=" << s->sectionName << ", fileOffset=" << fileOffset << "\n"; } } while (false) |
556 | llvm::dbgs() << " section=" << s->sectionNamedo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << " section=" << s->sectionName << ", fileOffset=" << fileOffset << "\n"; } } while (false) |
557 | << ", fileOffset=" << fileOffset << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MachOFileLayout")) { llvm::dbgs() << " section=" << s->sectionName << ", fileOffset=" << fileOffset << "\n"; } } while (false); |
558 | } |
559 | |
560 | // round up all segments to page aligned, except __LINKEDIT |
561 | if (!sg.name.equals("__LINKEDIT")) { |
562 | _segInfo[&sg].fileSize = llvm::alignTo(segFileSize, _file.pageSize); |
563 | fileOffset = llvm::alignTo(fileOffset + segFileSize, _file.pageSize); |
564 | } |
565 | _addressOfLinkEdit = sg.address + sg.size; |
566 | } |
567 | _startOfLinkEdit = fileOffset; |
568 | } |
569 | |
570 | size_t MachOFileLayout::size() const { |
571 | return _endOfSymbolStrings; |
572 | } |
573 | |
574 | void MachOFileLayout::writeMachHeader() { |
575 | auto cpusubtype = MachOLinkingContext::cpuSubtypeFromArch(_file.arch); |
576 | // dynamic x86 executables on newer OS version should also set the |
577 | // CPU_SUBTYPE_LIB64 mask in the CPU subtype. |
578 | // FIXME: Check that this is a dynamic executable, not a static one. |
579 | if (_file.fileType == llvm::MachO::MH_EXECUTE && |
580 | cpusubtype == CPU_SUBTYPE_X86_64_ALL && |
581 | _file.os == MachOLinkingContext::OS::macOSX) { |
582 | uint32_t version; |
583 | bool failed = MachOLinkingContext::parsePackedVersion("10.5", version); |
584 | if (!failed && _file.minOSverson >= version) |
585 | cpusubtype |= CPU_SUBTYPE_LIB64; |
586 | } |
587 | |
588 | mach_header *mh = reinterpret_cast<mach_header*>(_buffer); |
589 | mh->magic = _is64 ? llvm::MachO::MH_MAGIC_64 : llvm::MachO::MH_MAGIC; |
590 | mh->cputype = MachOLinkingContext::cpuTypeFromArch(_file.arch); |
591 | mh->cpusubtype = cpusubtype; |
592 | mh->filetype = _file.fileType; |
593 | mh->ncmds = _countOfLoadCommands; |
594 | mh->sizeofcmds = _endOfLoadCommands - _startOfLoadCommands; |
595 | mh->flags = _file.flags; |
596 | if (_swap) |
597 | swapStruct(*mh); |
598 | } |
599 | |
600 | uint32_t MachOFileLayout::indirectSymbolIndex(const Section §, |
601 | uint32_t &index) { |
602 | if (sect.indirectSymbols.empty()) |
603 | return 0; |
604 | uint32_t result = index; |
605 | index += sect.indirectSymbols.size(); |
606 | return result; |
607 | } |
608 | |
609 | uint32_t MachOFileLayout::indirectSymbolElementSize(const Section §) { |
610 | if (sect.indirectSymbols.empty()) |
611 | return 0; |
612 | if (sect.type != S_SYMBOL_STUBS) |
613 | return 0; |
614 | return sect.content.size() / sect.indirectSymbols.size(); |
615 | } |
616 | |
617 | template <typename T> |
618 | llvm::Error MachOFileLayout::writeSingleSegmentLoadCommand(uint8_t *&lc) { |
619 | typename T::command* seg = reinterpret_cast<typename T::command*>(lc); |
620 | seg->cmd = T::LC; |
621 | seg->cmdsize = sizeof(typename T::command) |
622 | + _file.sections.size() * sizeof(typename T::section); |
623 | uint8_t *next = lc + seg->cmdsize; |
624 | memset(seg->segname, 0, 16); |
625 | seg->vmaddr = 0; |
626 | seg->vmsize = _file.sections.back().address |
627 | + _file.sections.back().content.size(); |
628 | seg->fileoff = _endOfLoadCommands; |
629 | seg->filesize = _sectInfo[&_file.sections.back()].fileOffset + |
630 | _file.sections.back().content.size() - |
631 | _sectInfo[&_file.sections.front()].fileOffset; |
632 | seg->maxprot = VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE; |
633 | seg->initprot = VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE; |
634 | seg->nsects = _file.sections.size(); |
635 | seg->flags = 0; |
636 | if (_swap) |
637 | swapStruct(*seg); |
638 | typename T::section *sout = reinterpret_cast<typename T::section*> |
639 | (lc+sizeof(typename T::command)); |
640 | uint32_t relOffset = _startOfRelocations; |
641 | uint32_t indirectSymRunningIndex = 0; |
642 | for (const Section &sin : _file.sections) { |
643 | setString16(sin.sectionName, sout->sectname); |
644 | setString16(sin.segmentName, sout->segname); |
645 | sout->addr = sin.address; |
646 | sout->size = sin.content.size(); |
647 | sout->offset = _sectInfo[&sin].fileOffset; |
648 | sout->align = llvm::Log2_32(sin.alignment); |
649 | sout->reloff = sin.relocations.empty() ? 0 : relOffset; |
650 | sout->nreloc = sin.relocations.size(); |
651 | sout->flags = sin.type | sin.attributes; |
652 | sout->reserved1 = indirectSymbolIndex(sin, indirectSymRunningIndex); |
653 | sout->reserved2 = indirectSymbolElementSize(sin); |
654 | relOffset += sin.relocations.size() * sizeof(any_relocation_info); |
655 | if (_swap) |
656 | swapStruct(*sout); |
657 | ++sout; |
658 | } |
659 | lc = next; |
660 | return llvm::Error::success(); |
661 | } |
662 | |
663 | template <typename T> |
664 | llvm::Error MachOFileLayout::writeSegmentLoadCommands(uint8_t *&lc) { |
665 | uint32_t indirectSymRunningIndex = 0; |
666 | for (const Segment &seg : _file.segments) { |
667 | // Link edit has no sections and a custom range of address, so handle it |
668 | // specially. |
669 | SegExtraInfo &segInfo = _segInfo[&seg]; |
670 | if (seg.name.equals("__LINKEDIT")) { |
671 | size_t linkeditSize = _endOfLinkEdit - _startOfLinkEdit; |
672 | typename T::command* cmd = reinterpret_cast<typename T::command*>(lc); |
673 | cmd->cmd = T::LC; |
674 | cmd->cmdsize = sizeof(typename T::command); |
675 | uint8_t *next = lc + cmd->cmdsize; |
676 | setString16("__LINKEDIT", cmd->segname); |
677 | cmd->vmaddr = _addressOfLinkEdit; |
678 | cmd->vmsize = llvm::alignTo(linkeditSize, _file.pageSize); |
679 | cmd->fileoff = _startOfLinkEdit; |
680 | cmd->filesize = linkeditSize; |
681 | cmd->initprot = seg.init_access; |
682 | cmd->maxprot = seg.max_access; |
683 | cmd->nsects = 0; |
684 | cmd->flags = 0; |
685 | if (_swap) |
686 | swapStruct(*cmd); |
687 | lc = next; |
688 | continue; |
689 | } |
690 | // Write segment command with trailing sections. |
691 | typename T::command* cmd = reinterpret_cast<typename T::command*>(lc); |
692 | cmd->cmd = T::LC; |
693 | cmd->cmdsize = sizeof(typename T::command) |
694 | + segInfo.sections.size() * sizeof(typename T::section); |
695 | uint8_t *next = lc + cmd->cmdsize; |
696 | setString16(seg.name, cmd->segname); |
697 | cmd->vmaddr = seg.address; |
698 | cmd->vmsize = seg.size; |
699 | cmd->fileoff = segInfo.fileOffset; |
700 | cmd->filesize = segInfo.fileSize; |
701 | cmd->initprot = seg.init_access; |
702 | cmd->maxprot = seg.max_access; |
703 | cmd->nsects = segInfo.sections.size(); |
704 | cmd->flags = 0; |
705 | if (_swap) |
706 | swapStruct(*cmd); |
707 | typename T::section *sect = reinterpret_cast<typename T::section*> |
708 | (lc+sizeof(typename T::command)); |
709 | for (const Section *section : segInfo.sections) { |
710 | setString16(section->sectionName, sect->sectname); |
711 | setString16(section->segmentName, sect->segname); |
712 | sect->addr = section->address; |
713 | sect->size = section->content.size(); |
714 | if (isZeroFillSection(section->type)) |
715 | sect->offset = 0; |
716 | else |
717 | sect->offset = section->address - seg.address + segInfo.fileOffset; |
718 | sect->align = llvm::Log2_32(section->alignment); |
719 | sect->reloff = 0; |
720 | sect->nreloc = 0; |
721 | sect->flags = section->type | section->attributes; |
722 | sect->reserved1 = indirectSymbolIndex(*section, indirectSymRunningIndex); |
723 | sect->reserved2 = indirectSymbolElementSize(*section); |
724 | if (_swap) |
725 | swapStruct(*sect); |
726 | ++sect; |
727 | } |
728 | lc = reinterpret_cast<uint8_t*>(next); |
729 | } |
730 | return llvm::Error::success(); |
731 | } |
732 | |
733 | static void writeVersionMinLoadCommand(const NormalizedFile &_file, |
734 | bool _swap, |
735 | uint8_t *&lc) { |
736 | if (!_file.hasMinVersionLoadCommand) |
737 | return; |
738 | version_min_command *vm = reinterpret_cast<version_min_command*>(lc); |
739 | switch (_file.os) { |
740 | case MachOLinkingContext::OS::unknown: |
741 | vm->cmd = _file.minOSVersionKind; |
742 | vm->cmdsize = sizeof(version_min_command); |
743 | vm->version = _file.minOSverson; |
744 | vm->sdk = 0; |
745 | break; |
746 | case MachOLinkingContext::OS::macOSX: |
747 | vm->cmd = LC_VERSION_MIN_MACOSX; |
748 | vm->cmdsize = sizeof(version_min_command); |
749 | vm->version = _file.minOSverson; |
750 | vm->sdk = _file.sdkVersion; |
751 | break; |
752 | case MachOLinkingContext::OS::iOS: |
753 | case MachOLinkingContext::OS::iOS_simulator: |
754 | vm->cmd = LC_VERSION_MIN_IPHONEOS; |
755 | vm->cmdsize = sizeof(version_min_command); |
756 | vm->version = _file.minOSverson; |
757 | vm->sdk = _file.sdkVersion; |
758 | break; |
759 | } |
760 | if (_swap) |
761 | swapStruct(*vm); |
762 | lc += sizeof(version_min_command); |
763 | } |
764 | |
765 | llvm::Error MachOFileLayout::writeLoadCommands() { |
766 | uint8_t *lc = &_buffer[_startOfLoadCommands]; |
767 | if (_file.fileType == llvm::MachO::MH_OBJECT) { |
768 | // Object files have one unnamed segment which holds all sections. |
769 | if (_is64) { |
770 | if (auto ec = writeSingleSegmentLoadCommand<MachO64Trait>(lc)) |
771 | return ec; |
772 | } else { |
773 | if (auto ec = writeSingleSegmentLoadCommand<MachO32Trait>(lc)) |
774 | return ec; |
775 | } |
776 | // Add LC_SYMTAB with symbol table info |
777 | symtab_command* st = reinterpret_cast<symtab_command*>(lc); |
778 | st->cmd = LC_SYMTAB; |
779 | st->cmdsize = sizeof(symtab_command); |
780 | st->symoff = _startOfSymbols; |
781 | st->nsyms = _file.stabsSymbols.size() + _file.localSymbols.size() + |
782 | _file.globalSymbols.size() + _file.undefinedSymbols.size(); |
783 | st->stroff = _startOfSymbolStrings; |
784 | st->strsize = _endOfSymbolStrings - _startOfSymbolStrings; |
785 | if (_swap) |
786 | swapStruct(*st); |
787 | lc += sizeof(symtab_command); |
788 | |
789 | // Add LC_VERSION_MIN_MACOSX, LC_VERSION_MIN_IPHONEOS, |
790 | // LC_VERSION_MIN_WATCHOS, LC_VERSION_MIN_TVOS |
791 | writeVersionMinLoadCommand(_file, _swap, lc); |
792 | |
793 | // Add LC_FUNCTION_STARTS if needed. |
794 | if (_functionStartsSize != 0) { |
795 | linkedit_data_command* dl = reinterpret_cast<linkedit_data_command*>(lc); |
796 | dl->cmd = LC_FUNCTION_STARTS; |
797 | dl->cmdsize = sizeof(linkedit_data_command); |
798 | dl->dataoff = _startOfFunctionStarts; |
799 | dl->datasize = _functionStartsSize; |
800 | if (_swap) |
801 | swapStruct(*dl); |
802 | lc += sizeof(linkedit_data_command); |
803 | } |
804 | |
805 | // Add LC_DATA_IN_CODE if requested. |
806 | if (_file.generateDataInCodeLoadCommand) { |
807 | linkedit_data_command* dl = reinterpret_cast<linkedit_data_command*>(lc); |
808 | dl->cmd = LC_DATA_IN_CODE; |
809 | dl->cmdsize = sizeof(linkedit_data_command); |
810 | dl->dataoff = _startOfDataInCode; |
811 | dl->datasize = _dataInCodeSize; |
812 | if (_swap) |
813 | swapStruct(*dl); |
814 | lc += sizeof(linkedit_data_command); |
815 | } |
816 | } else { |
817 | // Final linked images have sections under segments. |
818 | if (_is64) { |
819 | if (auto ec = writeSegmentLoadCommands<MachO64Trait>(lc)) |
820 | return ec; |
821 | } else { |
822 | if (auto ec = writeSegmentLoadCommands<MachO32Trait>(lc)) |
823 | return ec; |
824 | } |
825 | |
826 | // Add LC_ID_DYLIB command for dynamic libraries. |
827 | if (_file.fileType == llvm::MachO::MH_DYLIB) { |
828 | dylib_command *dc = reinterpret_cast<dylib_command*>(lc); |
829 | StringRef path = _file.installName; |
830 | uint32_t size = sizeof(dylib_command) + pointerAlign(path.size() + 1); |
831 | dc->cmd = LC_ID_DYLIB; |
832 | dc->cmdsize = size; |
833 | dc->dylib.name = sizeof(dylib_command); // offset |
834 | // needs to be some constant value different than the one in LC_LOAD_DYLIB |
835 | dc->dylib.timestamp = 1; |
836 | dc->dylib.current_version = _file.currentVersion; |
837 | dc->dylib.compatibility_version = _file.compatVersion; |
838 | if (_swap) |
839 | swapStruct(*dc); |
840 | memcpy(lc + sizeof(dylib_command), path.begin(), path.size()); |
841 | lc[sizeof(dylib_command) + path.size()] = '\0'; |
842 | lc += size; |
843 | } |
844 | |
845 | // Add LC_DYLD_INFO_ONLY. |
846 | dyld_info_command* di = reinterpret_cast<dyld_info_command*>(lc); |
847 | di->cmd = LC_DYLD_INFO_ONLY; |
848 | di->cmdsize = sizeof(dyld_info_command); |
849 | di->rebase_off = _rebaseInfo.size() ? _startOfRebaseInfo : 0; |
850 | di->rebase_size = _rebaseInfo.size(); |
851 | di->bind_off = _bindingInfo.size() ? _startOfBindingInfo : 0; |
852 | di->bind_size = _bindingInfo.size(); |
853 | di->weak_bind_off = 0; |
854 | di->weak_bind_size = 0; |
855 | di->lazy_bind_off = _lazyBindingInfo.size() ? _startOfLazyBindingInfo : 0; |
856 | di->lazy_bind_size = _lazyBindingInfo.size(); |
857 | di->export_off = _exportTrie.size() ? _startOfExportTrie : 0; |
858 | di->export_size = _exportTrie.size(); |
859 | if (_swap) |
860 | swapStruct(*di); |
861 | lc += sizeof(dyld_info_command); |
862 | |
863 | // Add LC_SYMTAB with symbol table info. |
864 | symtab_command* st = reinterpret_cast<symtab_command*>(lc); |
865 | st->cmd = LC_SYMTAB; |
866 | st->cmdsize = sizeof(symtab_command); |
867 | st->symoff = _startOfSymbols; |
868 | st->nsyms = _file.stabsSymbols.size() + _file.localSymbols.size() + |
869 | _file.globalSymbols.size() + _file.undefinedSymbols.size(); |
870 | st->stroff = _startOfSymbolStrings; |
871 | st->strsize = _endOfSymbolStrings - _startOfSymbolStrings; |
872 | if (_swap) |
873 | swapStruct(*st); |
874 | lc += sizeof(symtab_command); |
875 | |
876 | // Add LC_DYSYMTAB |
877 | if (_file.fileType != llvm::MachO::MH_PRELOAD) { |
878 | dysymtab_command* dst = reinterpret_cast<dysymtab_command*>(lc); |
879 | dst->cmd = LC_DYSYMTAB; |
880 | dst->cmdsize = sizeof(dysymtab_command); |
881 | dst->ilocalsym = _symbolTableLocalsStartIndex; |
882 | dst->nlocalsym = _file.stabsSymbols.size() + |
883 | _file.localSymbols.size(); |
884 | dst->iextdefsym = _symbolTableGlobalsStartIndex; |
885 | dst->nextdefsym = _file.globalSymbols.size(); |
886 | dst->iundefsym = _symbolTableUndefinesStartIndex; |
887 | dst->nundefsym = _file.undefinedSymbols.size(); |
888 | dst->tocoff = 0; |
889 | dst->ntoc = 0; |
890 | dst->modtaboff = 0; |
891 | dst->nmodtab = 0; |
892 | dst->extrefsymoff = 0; |
893 | dst->nextrefsyms = 0; |
894 | dst->indirectsymoff = _startOfIndirectSymbols; |
895 | dst->nindirectsyms = _indirectSymbolTableCount; |
896 | dst->extreloff = 0; |
897 | dst->nextrel = 0; |
898 | dst->locreloff = 0; |
899 | dst->nlocrel = 0; |
900 | if (_swap) |
901 | swapStruct(*dst); |
902 | lc += sizeof(dysymtab_command); |
903 | } |
904 | |
905 | // If main executable, add LC_LOAD_DYLINKER |
906 | if (_file.fileType == llvm::MachO::MH_EXECUTE) { |
907 | // Build LC_LOAD_DYLINKER load command. |
908 | uint32_t size=pointerAlign(sizeof(dylinker_command)+dyldPath().size()+1); |
909 | dylinker_command* dl = reinterpret_cast<dylinker_command*>(lc); |
910 | dl->cmd = LC_LOAD_DYLINKER; |
911 | dl->cmdsize = size; |
912 | dl->name = sizeof(dylinker_command); // offset |
913 | if (_swap) |
914 | swapStruct(*dl); |
915 | memcpy(lc+sizeof(dylinker_command), dyldPath().data(), dyldPath().size()); |
916 | lc[sizeof(dylinker_command)+dyldPath().size()] = '\0'; |
917 | lc += size; |
918 | } |
919 | |
920 | // Add LC_VERSION_MIN_MACOSX, LC_VERSION_MIN_IPHONEOS, LC_VERSION_MIN_WATCHOS, |
921 | // LC_VERSION_MIN_TVOS |
922 | writeVersionMinLoadCommand(_file, _swap, lc); |
923 | |
924 | // Add LC_SOURCE_VERSION |
925 | { |
926 | // Note, using a temporary here to appease UB as we may not be aligned |
927 | // enough for a struct containing a uint64_t when emitting a 32-bit binary |
928 | source_version_command sv; |
929 | sv.cmd = LC_SOURCE_VERSION; |
930 | sv.cmdsize = sizeof(source_version_command); |
931 | sv.version = _file.sourceVersion; |
932 | if (_swap) |
933 | swapStruct(sv); |
934 | memcpy(lc, &sv, sizeof(source_version_command)); |
935 | lc += sizeof(source_version_command); |
936 | } |
937 | |
938 | // If main executable, add LC_MAIN. |
939 | if (_file.fileType == llvm::MachO::MH_EXECUTE) { |
940 | // Build LC_MAIN load command. |
941 | // Note, using a temporary here to appease UB as we may not be aligned |
942 | // enough for a struct containing a uint64_t when emitting a 32-bit binary |
943 | entry_point_command ep; |
944 | ep.cmd = LC_MAIN; |
945 | ep.cmdsize = sizeof(entry_point_command); |
946 | ep.entryoff = _file.entryAddress - _seg1addr; |
947 | ep.stacksize = _file.stackSize; |
948 | if (_swap) |
949 | swapStruct(ep); |
950 | memcpy(lc, &ep, sizeof(entry_point_command)); |
951 | lc += sizeof(entry_point_command); |
952 | } |
953 | |
954 | // Add LC_LOAD_DYLIB commands |
955 | for (const DependentDylib &dep : _file.dependentDylibs) { |
956 | dylib_command* dc = reinterpret_cast<dylib_command*>(lc); |
957 | uint32_t size = sizeof(dylib_command) + pointerAlign(dep.path.size()+1); |
958 | dc->cmd = dep.kind; |
959 | dc->cmdsize = size; |
960 | dc->dylib.name = sizeof(dylib_command); // offset |
961 | // needs to be some constant value different than the one in LC_ID_DYLIB |
962 | dc->dylib.timestamp = 2; |
963 | dc->dylib.current_version = dep.currentVersion; |
964 | dc->dylib.compatibility_version = dep.compatVersion; |
965 | if (_swap) |
966 | swapStruct(*dc); |
967 | memcpy(lc+sizeof(dylib_command), dep.path.begin(), dep.path.size()); |
968 | lc[sizeof(dylib_command)+dep.path.size()] = '\0'; |
969 | lc += size; |
970 | } |
971 | |
972 | // Add LC_RPATH |
973 | for (const StringRef &path : _file.rpaths) { |
974 | rpath_command *rpc = reinterpret_cast<rpath_command *>(lc); |
975 | uint32_t size = pointerAlign(sizeof(rpath_command) + path.size() + 1); |
976 | rpc->cmd = LC_RPATH; |
977 | rpc->cmdsize = size; |
978 | rpc->path = sizeof(rpath_command); // offset |
979 | if (_swap) |
980 | swapStruct(*rpc); |
981 | memcpy(lc+sizeof(rpath_command), path.begin(), path.size()); |
982 | lc[sizeof(rpath_command)+path.size()] = '\0'; |
983 | lc += size; |
984 | } |
985 | |
986 | // Add LC_FUNCTION_STARTS if needed. |
987 | if (_functionStartsSize != 0) { |
988 | linkedit_data_command* dl = reinterpret_cast<linkedit_data_command*>(lc); |
989 | dl->cmd = LC_FUNCTION_STARTS; |
990 | dl->cmdsize = sizeof(linkedit_data_command); |
991 | dl->dataoff = _startOfFunctionStarts; |
992 | dl->datasize = _functionStartsSize; |
993 | if (_swap) |
994 | swapStruct(*dl); |
995 | lc += sizeof(linkedit_data_command); |
996 | } |
997 | |
998 | // Add LC_DATA_IN_CODE if requested. |
999 | if (_file.generateDataInCodeLoadCommand) { |
1000 | linkedit_data_command* dl = reinterpret_cast<linkedit_data_command*>(lc); |
1001 | dl->cmd = LC_DATA_IN_CODE; |
1002 | dl->cmdsize = sizeof(linkedit_data_command); |
1003 | dl->dataoff = _startOfDataInCode; |
1004 | dl->datasize = _dataInCodeSize; |
1005 | if (_swap) |
1006 | swapStruct(*dl); |
1007 | lc += sizeof(linkedit_data_command); |
1008 | } |
1009 | } |
1010 | return llvm::Error::success(); |
1011 | } |
1012 | |
1013 | void MachOFileLayout::writeSectionContent() { |
1014 | for (const Section &s : _file.sections) { |
1015 | // Copy all section content to output buffer. |
1016 | if (isZeroFillSection(s.type)) |
1017 | continue; |
1018 | if (s.content.empty()) |
1019 | continue; |
1020 | uint32_t offset = _sectInfo[&s].fileOffset; |
1021 | uint8_t *p = &_buffer[offset]; |
1022 | memcpy(p, &s.content[0], s.content.size()); |
1023 | p += s.content.size(); |
Value stored to 'p' is never read | |
1024 | } |
1025 | } |
1026 | |
1027 | void MachOFileLayout::writeRelocations() { |
1028 | uint32_t relOffset = _startOfRelocations; |
1029 | for (Section sect : _file.sections) { |
1030 | for (Relocation r : sect.relocations) { |
1031 | any_relocation_info* rb = reinterpret_cast<any_relocation_info*>( |
1032 | &_buffer[relOffset]); |
1033 | *rb = packRelocation(r, _swap, _bigEndianArch); |
1034 | relOffset += sizeof(any_relocation_info); |
1035 | } |
1036 | } |
1037 | } |
1038 | |
1039 | void MachOFileLayout::appendSymbols(const std::vector<Symbol> &symbols, |
1040 | uint32_t &symOffset, uint32_t &strOffset) { |
1041 | for (const Symbol &sym : symbols) { |
1042 | if (_is64) { |
1043 | nlist_64* nb = reinterpret_cast<nlist_64*>(&_buffer[symOffset]); |
1044 | nb->n_strx = strOffset - _startOfSymbolStrings; |
1045 | nb->n_type = sym.type | sym.scope; |
1046 | nb->n_sect = sym.sect; |
1047 | nb->n_desc = sym.desc; |
1048 | nb->n_value = sym.value; |
1049 | if (_swap) |
1050 | swapStruct(*nb); |
1051 | symOffset += sizeof(nlist_64); |
1052 | } else { |
1053 | nlist* nb = reinterpret_cast<nlist*>(&_buffer[symOffset]); |
1054 | nb->n_strx = strOffset - _startOfSymbolStrings; |
1055 | nb->n_type = sym.type | sym.scope; |
1056 | nb->n_sect = sym.sect; |
1057 | nb->n_desc = sym.desc; |
1058 | nb->n_value = sym.value; |
1059 | if (_swap) |
1060 | swapStruct(*nb); |
1061 | symOffset += sizeof(nlist); |
1062 | } |
1063 | memcpy(&_buffer[strOffset], sym.name.begin(), sym.name.size()); |
1064 | strOffset += sym.name.size(); |
1065 | _buffer[strOffset++] ='\0'; // Strings in table have nul terminator. |
1066 | } |
1067 | } |
1068 | |
1069 | void MachOFileLayout::writeFunctionStartsInfo() { |
1070 | if (!_functionStartsSize) |
1071 | return; |
1072 | memcpy(&_buffer[_startOfFunctionStarts], _file.functionStarts.data(), |
1073 | _functionStartsSize); |
1074 | } |
1075 | |
1076 | void MachOFileLayout::writeDataInCodeInfo() { |
1077 | uint32_t offset = _startOfDataInCode; |
1078 | for (const DataInCode &entry : _file.dataInCode) { |
1079 | data_in_code_entry *dst = reinterpret_cast<data_in_code_entry*>( |
1080 | &_buffer[offset]); |
1081 | dst->offset = entry.offset; |
1082 | dst->length = entry.length; |
1083 | dst->kind = entry.kind; |
1084 | if (_swap) |
1085 | swapStruct(*dst); |
1086 | offset += sizeof(data_in_code_entry); |
1087 | } |
1088 | } |
1089 | |
1090 | void MachOFileLayout::writeSymbolTable() { |
1091 | // Write symbol table and symbol strings in parallel. |
1092 | uint32_t symOffset = _startOfSymbols; |
1093 | uint32_t strOffset = _startOfSymbolStrings; |
1094 | // Reserve n_strx offset of zero to mean no name. |
1095 | _buffer[strOffset++] = ' '; |
1096 | _buffer[strOffset++] = '\0'; |
1097 | appendSymbols(_file.stabsSymbols, symOffset, strOffset); |
1098 | appendSymbols(_file.localSymbols, symOffset, strOffset); |
1099 | appendSymbols(_file.globalSymbols, symOffset, strOffset); |
1100 | appendSymbols(_file.undefinedSymbols, symOffset, strOffset); |
1101 | // Write indirect symbol table array. |
1102 | uint32_t *indirects = reinterpret_cast<uint32_t*> |
1103 | (&_buffer[_startOfIndirectSymbols]); |
1104 | if (_file.fileType == llvm::MachO::MH_OBJECT) { |
1105 | // Object files have sections in same order as input normalized file. |
1106 | for (const Section §ion : _file.sections) { |
1107 | for (uint32_t index : section.indirectSymbols) { |
1108 | if (_swap) |
1109 | *indirects++ = llvm::sys::getSwappedBytes(index); |
1110 | else |
1111 | *indirects++ = index; |
1112 | } |
1113 | } |
1114 | } else { |
1115 | // Final linked images must sort sections from normalized file. |
1116 | for (const Segment &seg : _file.segments) { |
1117 | SegExtraInfo &segInfo = _segInfo[&seg]; |
1118 | for (const Section *section : segInfo.sections) { |
1119 | for (uint32_t index : section->indirectSymbols) { |
1120 | if (_swap) |
1121 | *indirects++ = llvm::sys::getSwappedBytes(index); |
1122 | else |
1123 | *indirects++ = index; |
1124 | } |
1125 | } |
1126 | } |
1127 | } |
1128 | } |
1129 | |
1130 | void MachOFileLayout::writeRebaseInfo() { |
1131 | memcpy(&_buffer[_startOfRebaseInfo], _rebaseInfo.bytes(), _rebaseInfo.size()); |
1132 | } |
1133 | |
1134 | void MachOFileLayout::writeBindingInfo() { |
1135 | memcpy(&_buffer[_startOfBindingInfo], |
1136 | _bindingInfo.bytes(), _bindingInfo.size()); |
1137 | } |
1138 | |
1139 | void MachOFileLayout::writeLazyBindingInfo() { |
1140 | memcpy(&_buffer[_startOfLazyBindingInfo], |
1141 | _lazyBindingInfo.bytes(), _lazyBindingInfo.size()); |
1142 | } |
1143 | |
1144 | void MachOFileLayout::writeExportInfo() { |
1145 | memcpy(&_buffer[_startOfExportTrie], _exportTrie.bytes(), _exportTrie.size()); |
1146 | } |
1147 | |
1148 | void MachOFileLayout::buildLinkEditInfo() { |
1149 | buildRebaseInfo(); |
1150 | buildBindInfo(); |
1151 | buildLazyBindInfo(); |
1152 | buildExportTrie(); |
1153 | computeSymbolTableSizes(); |
1154 | computeFunctionStartsSize(); |
1155 | computeDataInCodeSize(); |
1156 | } |
1157 | |
1158 | void MachOFileLayout::buildSectionRelocations() { |
1159 | |
1160 | } |
1161 | |
1162 | void MachOFileLayout::buildRebaseInfo() { |
1163 | // TODO: compress rebasing info. |
1164 | for (const RebaseLocation& entry : _file.rebasingInfo) { |
1165 | _rebaseInfo.append_byte(REBASE_OPCODE_SET_TYPE_IMM | entry.kind); |
1166 | _rebaseInfo.append_byte(REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB |
1167 | | entry.segIndex); |
1168 | _rebaseInfo.append_uleb128(entry.segOffset); |
1169 | _rebaseInfo.append_uleb128(REBASE_OPCODE_DO_REBASE_IMM_TIMES | 1); |
1170 | } |
1171 | _rebaseInfo.append_byte(REBASE_OPCODE_DONE); |
1172 | _rebaseInfo.align(_is64 ? 8 : 4); |
1173 | } |
1174 | |
1175 | void MachOFileLayout::buildBindInfo() { |
1176 | // TODO: compress bind info. |
1177 | uint64_t lastAddend = 0; |
1178 | int lastOrdinal = 0x80000000; |
1179 | StringRef lastSymbolName; |
1180 | BindType lastType = (BindType)0; |
1181 | Hex32 lastSegOffset = ~0U; |
1182 | uint8_t lastSegIndex = (uint8_t)~0U; |
1183 | for (const BindLocation& entry : _file.bindingInfo) { |
1184 | if (entry.ordinal != lastOrdinal) { |
1185 | if (entry.ordinal <= 0) |
1186 | _bindingInfo.append_byte(BIND_OPCODE_SET_DYLIB_SPECIAL_IMM | |
1187 | (entry.ordinal & BIND_IMMEDIATE_MASK)); |
1188 | else if (entry.ordinal <= BIND_IMMEDIATE_MASK) |
1189 | _bindingInfo.append_byte(BIND_OPCODE_SET_DYLIB_ORDINAL_IMM | |
1190 | entry.ordinal); |
1191 | else { |
1192 | _bindingInfo.append_byte(BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB); |
1193 | _bindingInfo.append_uleb128(entry.ordinal); |
1194 | } |
1195 | lastOrdinal = entry.ordinal; |
1196 | } |
1197 | |
1198 | if (lastSymbolName != entry.symbolName) { |
1199 | _bindingInfo.append_byte(BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM); |
1200 | _bindingInfo.append_string(entry.symbolName); |
1201 | lastSymbolName = entry.symbolName; |
1202 | } |
1203 | |
1204 | if (lastType != entry.kind) { |
1205 | _bindingInfo.append_byte(BIND_OPCODE_SET_TYPE_IMM | entry.kind); |
1206 | lastType = entry.kind; |
1207 | } |
1208 | |
1209 | if (lastSegIndex != entry.segIndex || lastSegOffset != entry.segOffset) { |
1210 | _bindingInfo.append_byte(BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB |
1211 | | entry.segIndex); |
1212 | _bindingInfo.append_uleb128(entry.segOffset); |
1213 | lastSegIndex = entry.segIndex; |
1214 | lastSegOffset = entry.segOffset; |
1215 | } |
1216 | if (entry.addend != lastAddend) { |
1217 | _bindingInfo.append_byte(BIND_OPCODE_SET_ADDEND_SLEB); |
1218 | _bindingInfo.append_sleb128(entry.addend); |
1219 | lastAddend = entry.addend; |
1220 | } |
1221 | _bindingInfo.append_byte(BIND_OPCODE_DO_BIND); |
1222 | } |
1223 | _bindingInfo.append_byte(BIND_OPCODE_DONE); |
1224 | _bindingInfo.align(_is64 ? 8 : 4); |
1225 | } |
1226 | |
1227 | void MachOFileLayout::buildLazyBindInfo() { |
1228 | for (const BindLocation& entry : _file.lazyBindingInfo) { |
1229 | _lazyBindingInfo.append_byte(BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB |
1230 | | entry.segIndex); |
1231 | _lazyBindingInfo.append_uleb128(entry.segOffset); |
1232 | if (entry.ordinal <= 0) |
1233 | _lazyBindingInfo.append_byte(BIND_OPCODE_SET_DYLIB_SPECIAL_IMM | |
1234 | (entry.ordinal & BIND_IMMEDIATE_MASK)); |
1235 | else if (entry.ordinal <= BIND_IMMEDIATE_MASK) |
1236 | _lazyBindingInfo.append_byte(BIND_OPCODE_SET_DYLIB_ORDINAL_IMM | |
1237 | entry.ordinal); |
1238 | else { |
1239 | _lazyBindingInfo.append_byte(BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB); |
1240 | _lazyBindingInfo.append_uleb128(entry.ordinal); |
1241 | } |
1242 | // FIXME: We need to | the opcode here with flags. |
1243 | _lazyBindingInfo.append_byte(BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM); |
1244 | _lazyBindingInfo.append_string(entry.symbolName); |
1245 | _lazyBindingInfo.append_byte(BIND_OPCODE_DO_BIND); |
1246 | _lazyBindingInfo.append_byte(BIND_OPCODE_DONE); |
1247 | } |
1248 | _lazyBindingInfo.align(_is64 ? 8 : 4); |
1249 | } |
1250 | |
1251 | void TrieNode::addSymbol(const Export& entry, |
1252 | BumpPtrAllocator &allocator, |
1253 | std::vector<TrieNode*> &allNodes) { |
1254 | StringRef partialStr = entry.name.drop_front(_cummulativeString.size()); |
1255 | for (TrieEdge &edge : _children) { |
1256 | StringRef edgeStr = edge._subString; |
1257 | if (partialStr.startswith(edgeStr)) { |
1258 | // Already have matching edge, go down that path. |
1259 | edge._child->addSymbol(entry, allocator, allNodes); |
1260 | return; |
1261 | } |
1262 | // See if string has commmon prefix with existing edge. |
1263 | for (int n=edgeStr.size()-1; n > 0; --n) { |
1264 | if (partialStr.substr(0, n).equals(edgeStr.substr(0, n))) { |
1265 | // Splice in new node: was A -> C, now A -> B -> C |
1266 | StringRef bNodeStr = edge._child->_cummulativeString; |
1267 | bNodeStr = bNodeStr.drop_back(edgeStr.size()-n).copy(allocator); |
1268 | auto *bNode = new (allocator) TrieNode(bNodeStr); |
1269 | allNodes.push_back(bNode); |
1270 | TrieNode* cNode = edge._child; |
1271 | StringRef abEdgeStr = edgeStr.substr(0,n).copy(allocator); |
1272 | StringRef bcEdgeStr = edgeStr.substr(n).copy(allocator); |
1273 | DEBUG_WITH_TYPE("trie-builder", llvm::dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "splice in TrieNode('" << bNodeStr << "') between edge '" << abEdgeStr << "' and edge='" << bcEdgeStr<< "'\n"; } } while (false) |
1274 | << "splice in TrieNode('" << bNodeStrdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "splice in TrieNode('" << bNodeStr << "') between edge '" << abEdgeStr << "' and edge='" << bcEdgeStr<< "'\n"; } } while (false) |
1275 | << "') between edge '"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "splice in TrieNode('" << bNodeStr << "') between edge '" << abEdgeStr << "' and edge='" << bcEdgeStr<< "'\n"; } } while (false) |
1276 | << abEdgeStr << "' and edge='"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "splice in TrieNode('" << bNodeStr << "') between edge '" << abEdgeStr << "' and edge='" << bcEdgeStr<< "'\n"; } } while (false) |
1277 | << bcEdgeStr<< "'\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "splice in TrieNode('" << bNodeStr << "') between edge '" << abEdgeStr << "' and edge='" << bcEdgeStr<< "'\n"; } } while (false); |
1278 | TrieEdge& abEdge = edge; |
1279 | abEdge._subString = abEdgeStr; |
1280 | abEdge._child = bNode; |
1281 | auto *bcEdge = new (allocator) TrieEdge(bcEdgeStr, cNode); |
1282 | bNode->_children.insert(bNode->_children.end(), bcEdge); |
1283 | bNode->addSymbol(entry, allocator, allNodes); |
1284 | return; |
1285 | } |
1286 | } |
1287 | } |
1288 | if (entry.flags & EXPORT_SYMBOL_FLAGS_REEXPORT) { |
1289 | assert(entry.otherOffset != 0)((entry.otherOffset != 0) ? static_cast<void> (0) : __assert_fail ("entry.otherOffset != 0", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp" , 1289, __PRETTY_FUNCTION__)); |
1290 | } |
1291 | if (entry.flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER) { |
1292 | assert(entry.otherOffset != 0)((entry.otherOffset != 0) ? static_cast<void> (0) : __assert_fail ("entry.otherOffset != 0", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp" , 1292, __PRETTY_FUNCTION__)); |
1293 | } |
1294 | // No commonality with any existing child, make a new edge. |
1295 | auto *newNode = new (allocator) TrieNode(entry.name.copy(allocator)); |
1296 | auto *newEdge = new (allocator) TrieEdge(partialStr, newNode); |
1297 | _children.insert(_children.end(), newEdge); |
1298 | DEBUG_WITH_TYPE("trie-builder", llvm::dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "new TrieNode('" << entry.name << "') with edge '" << partialStr << "' from node='" << _cummulativeString << "'\n"; } } while (false) |
1299 | << "new TrieNode('" << entry.name << "') with edge '"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "new TrieNode('" << entry.name << "') with edge '" << partialStr << "' from node='" << _cummulativeString << "'\n"; } } while (false) |
1300 | << partialStr << "' from node='"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "new TrieNode('" << entry.name << "') with edge '" << partialStr << "' from node='" << _cummulativeString << "'\n"; } } while (false) |
1301 | << _cummulativeString << "'\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("trie-builder")) { llvm::dbgs() << "new TrieNode('" << entry.name << "') with edge '" << partialStr << "' from node='" << _cummulativeString << "'\n"; } } while (false); |
1302 | newNode->_address = entry.offset; |
1303 | newNode->_flags = entry.flags | entry.kind; |
1304 | newNode->_other = entry.otherOffset; |
1305 | if ((entry.flags & EXPORT_SYMBOL_FLAGS_REEXPORT) && !entry.otherName.empty()) |
1306 | newNode->_importedName = entry.otherName.copy(allocator); |
1307 | newNode->_hasExportInfo = true; |
1308 | allNodes.push_back(newNode); |
1309 | } |
1310 | |
1311 | void TrieNode::addOrderedNodes(const Export& entry, |
1312 | std::vector<TrieNode*> &orderedNodes) { |
1313 | if (!_ordered) { |
1314 | orderedNodes.push_back(this); |
1315 | _ordered = true; |
1316 | } |
1317 | |
1318 | StringRef partialStr = entry.name.drop_front(_cummulativeString.size()); |
1319 | for (TrieEdge &edge : _children) { |
1320 | StringRef edgeStr = edge._subString; |
1321 | if (partialStr.startswith(edgeStr)) { |
1322 | // Already have matching edge, go down that path. |
1323 | edge._child->addOrderedNodes(entry, orderedNodes); |
1324 | return; |
1325 | } |
1326 | } |
1327 | } |
1328 | |
1329 | bool TrieNode::updateOffset(uint32_t& offset) { |
1330 | uint32_t nodeSize = 1; // Length when no export info |
1331 | if (_hasExportInfo) { |
1332 | if (_flags & EXPORT_SYMBOL_FLAGS_REEXPORT) { |
1333 | nodeSize = llvm::getULEB128Size(_flags); |
1334 | nodeSize += llvm::getULEB128Size(_other); // Other contains ordinal. |
1335 | nodeSize += _importedName.size(); |
1336 | ++nodeSize; // Trailing zero in imported name. |
1337 | } else { |
1338 | nodeSize = llvm::getULEB128Size(_flags) + llvm::getULEB128Size(_address); |
1339 | if (_flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER) |
1340 | nodeSize += llvm::getULEB128Size(_other); |
1341 | } |
1342 | // Overall node size so far is uleb128 of export info + actual export info. |
1343 | nodeSize += llvm::getULEB128Size(nodeSize); |
1344 | } |
1345 | // Compute size of all child edges. |
1346 | ++nodeSize; // Byte for number of chidren. |
1347 | for (TrieEdge &edge : _children) { |
1348 | nodeSize += edge._subString.size() + 1 // String length. |
1349 | + llvm::getULEB128Size(edge._child->_trieOffset); // Offset len. |
1350 | } |
1351 | // On input, 'offset' is new prefered location for this node. |
1352 | bool result = (_trieOffset != offset); |
1353 | // Store new location in node object for use by parents. |
1354 | _trieOffset = offset; |
1355 | // Update offset for next iteration. |
1356 | offset += nodeSize; |
1357 | // Return true if _trieOffset was changed. |
1358 | return result; |
1359 | } |
1360 | |
1361 | void TrieNode::appendToByteBuffer(ByteBuffer &out) { |
1362 | if (_hasExportInfo) { |
1363 | if (_flags & EXPORT_SYMBOL_FLAGS_REEXPORT) { |
1364 | if (!_importedName.empty()) { |
1365 | // nodes with re-export info: size, flags, ordinal, import-name |
1366 | uint32_t nodeSize = llvm::getULEB128Size(_flags) |
1367 | + llvm::getULEB128Size(_other) |
1368 | + _importedName.size() + 1; |
1369 | assert(nodeSize < 256)((nodeSize < 256) ? static_cast<void> (0) : __assert_fail ("nodeSize < 256", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp" , 1369, __PRETTY_FUNCTION__)); |
1370 | out.append_byte(nodeSize); |
1371 | out.append_uleb128(_flags); |
1372 | out.append_uleb128(_other); |
1373 | out.append_string(_importedName); |
1374 | } else { |
1375 | // nodes without re-export info: size, flags, ordinal, empty-string |
1376 | uint32_t nodeSize = llvm::getULEB128Size(_flags) |
1377 | + llvm::getULEB128Size(_other) + 1; |
1378 | assert(nodeSize < 256)((nodeSize < 256) ? static_cast<void> (0) : __assert_fail ("nodeSize < 256", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp" , 1378, __PRETTY_FUNCTION__)); |
1379 | out.append_byte(nodeSize); |
1380 | out.append_uleb128(_flags); |
1381 | out.append_uleb128(_other); |
1382 | out.append_byte(0); |
1383 | } |
1384 | } else if ( _flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER ) { |
1385 | // Nodes with export info: size, flags, address, other |
1386 | uint32_t nodeSize = llvm::getULEB128Size(_flags) |
1387 | + llvm::getULEB128Size(_address) |
1388 | + llvm::getULEB128Size(_other); |
1389 | assert(nodeSize < 256)((nodeSize < 256) ? static_cast<void> (0) : __assert_fail ("nodeSize < 256", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp" , 1389, __PRETTY_FUNCTION__)); |
1390 | out.append_byte(nodeSize); |
1391 | out.append_uleb128(_flags); |
1392 | out.append_uleb128(_address); |
1393 | out.append_uleb128(_other); |
1394 | } else { |
1395 | // Nodes with export info: size, flags, address |
1396 | uint32_t nodeSize = llvm::getULEB128Size(_flags) |
1397 | + llvm::getULEB128Size(_address); |
1398 | assert(nodeSize < 256)((nodeSize < 256) ? static_cast<void> (0) : __assert_fail ("nodeSize < 256", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp" , 1398, __PRETTY_FUNCTION__)); |
1399 | out.append_byte(nodeSize); |
1400 | out.append_uleb128(_flags); |
1401 | out.append_uleb128(_address); |
1402 | } |
1403 | } else { |
1404 | // Node with no export info. |
1405 | uint32_t nodeSize = 0; |
1406 | out.append_byte(nodeSize); |
1407 | } |
1408 | // Add number of children. |
1409 | assert(_children.size() < 256)((_children.size() < 256) ? static_cast<void> (0) : __assert_fail ("_children.size() < 256", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp" , 1409, __PRETTY_FUNCTION__)); |
1410 | out.append_byte(_children.size()); |
1411 | // Append each child edge substring and node offset. |
1412 | for (TrieEdge &edge : _children) { |
1413 | out.append_string(edge._subString); |
1414 | out.append_uleb128(edge._child->_trieOffset); |
1415 | } |
1416 | } |
1417 | |
1418 | void MachOFileLayout::buildExportTrie() { |
1419 | if (_file.exportInfo.empty()) |
1420 | return; |
1421 | |
1422 | // For all temporary strings and objects used building trie. |
1423 | BumpPtrAllocator allocator; |
1424 | |
1425 | // Build trie of all exported symbols. |
1426 | auto *rootNode = new (allocator) TrieNode(StringRef()); |
1427 | std::vector<TrieNode*> allNodes; |
1428 | allNodes.reserve(_file.exportInfo.size()*2); |
1429 | allNodes.push_back(rootNode); |
1430 | for (const Export& entry : _file.exportInfo) { |
1431 | rootNode->addSymbol(entry, allocator, allNodes); |
1432 | } |
1433 | |
1434 | std::vector<TrieNode*> orderedNodes; |
1435 | orderedNodes.reserve(allNodes.size()); |
1436 | |
1437 | for (const Export& entry : _file.exportInfo) |
1438 | rootNode->addOrderedNodes(entry, orderedNodes); |
1439 | |
1440 | // Assign each node in the vector an offset in the trie stream, iterating |
1441 | // until all uleb128 sizes have stabilized. |
1442 | bool more; |
1443 | do { |
1444 | uint32_t offset = 0; |
1445 | more = false; |
1446 | for (TrieNode* node : orderedNodes) { |
1447 | if (node->updateOffset(offset)) |
1448 | more = true; |
1449 | } |
1450 | } while (more); |
1451 | |
1452 | // Serialize trie to ByteBuffer. |
1453 | for (TrieNode* node : orderedNodes) { |
1454 | node->appendToByteBuffer(_exportTrie); |
1455 | } |
1456 | _exportTrie.align(_is64 ? 8 : 4); |
1457 | } |
1458 | |
1459 | void MachOFileLayout::computeSymbolTableSizes() { |
1460 | // MachO symbol tables have three ranges: locals, globals, and undefines |
1461 | const size_t nlistSize = (_is64 ? sizeof(nlist_64) : sizeof(nlist)); |
1462 | _symbolTableSize = nlistSize * (_file.stabsSymbols.size() |
1463 | + _file.localSymbols.size() |
1464 | + _file.globalSymbols.size() |
1465 | + _file.undefinedSymbols.size()); |
1466 | // Always reserve 1-byte for the empty string and 1-byte for its terminator. |
1467 | _symbolStringPoolSize = 2; |
1468 | for (const Symbol &sym : _file.stabsSymbols) { |
1469 | _symbolStringPoolSize += (sym.name.size()+1); |
1470 | } |
1471 | for (const Symbol &sym : _file.localSymbols) { |
1472 | _symbolStringPoolSize += (sym.name.size()+1); |
1473 | } |
1474 | for (const Symbol &sym : _file.globalSymbols) { |
1475 | _symbolStringPoolSize += (sym.name.size()+1); |
1476 | } |
1477 | for (const Symbol &sym : _file.undefinedSymbols) { |
1478 | _symbolStringPoolSize += (sym.name.size()+1); |
1479 | } |
1480 | _symbolTableLocalsStartIndex = 0; |
1481 | _symbolTableGlobalsStartIndex = _file.stabsSymbols.size() + |
1482 | _file.localSymbols.size(); |
1483 | _symbolTableUndefinesStartIndex = _symbolTableGlobalsStartIndex |
1484 | + _file.globalSymbols.size(); |
1485 | |
1486 | _indirectSymbolTableCount = 0; |
1487 | for (const Section § : _file.sections) { |
1488 | _indirectSymbolTableCount += sect.indirectSymbols.size(); |
1489 | } |
1490 | } |
1491 | |
1492 | void MachOFileLayout::computeFunctionStartsSize() { |
1493 | _functionStartsSize = _file.functionStarts.size(); |
1494 | } |
1495 | |
1496 | void MachOFileLayout::computeDataInCodeSize() { |
1497 | _dataInCodeSize = _file.dataInCode.size() * sizeof(data_in_code_entry); |
1498 | } |
1499 | |
1500 | void MachOFileLayout::writeLinkEditContent() { |
1501 | if (_file.fileType == llvm::MachO::MH_OBJECT) { |
1502 | writeRelocations(); |
1503 | writeFunctionStartsInfo(); |
1504 | writeDataInCodeInfo(); |
1505 | writeSymbolTable(); |
1506 | } else { |
1507 | writeRebaseInfo(); |
1508 | writeBindingInfo(); |
1509 | writeLazyBindingInfo(); |
1510 | // TODO: add weak binding info |
1511 | writeExportInfo(); |
1512 | writeFunctionStartsInfo(); |
1513 | writeDataInCodeInfo(); |
1514 | writeSymbolTable(); |
1515 | } |
1516 | } |
1517 | |
1518 | llvm::Error MachOFileLayout::writeBinary(StringRef path) { |
1519 | // Check for pending error from constructor. |
1520 | if (_ec) |
1521 | return llvm::errorCodeToError(_ec); |
1522 | // Create FileOutputBuffer with calculated size. |
1523 | unsigned flags = 0; |
1524 | if (_file.fileType != llvm::MachO::MH_OBJECT) |
1525 | flags = llvm::FileOutputBuffer::F_executable; |
1526 | Expected<std::unique_ptr<llvm::FileOutputBuffer>> fobOrErr = |
1527 | llvm::FileOutputBuffer::create(path, size(), flags); |
1528 | if (Error E = fobOrErr.takeError()) |
1529 | return E; |
1530 | std::unique_ptr<llvm::FileOutputBuffer> &fob = *fobOrErr; |
1531 | // Write content. |
1532 | _buffer = fob->getBufferStart(); |
1533 | writeMachHeader(); |
1534 | if (auto ec = writeLoadCommands()) |
1535 | return ec; |
1536 | writeSectionContent(); |
1537 | writeLinkEditContent(); |
1538 | if (Error E = fob->commit()) |
1539 | return E; |
1540 | |
1541 | return llvm::Error::success(); |
1542 | } |
1543 | |
1544 | /// Takes in-memory normalized view and writes a mach-o object file. |
1545 | llvm::Error writeBinary(const NormalizedFile &file, StringRef path) { |
1546 | MachOFileLayout layout(file); |
1547 | return layout.writeBinary(path); |
1548 | } |
1549 | |
1550 | } // namespace normalized |
1551 | } // namespace mach_o |
1552 | } // namespace lld |