File: | src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Object/COFF.h |
Warning: | line 319, column 12 Called C++ object pointer is null |
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1 | //===- COFFObjectFile.cpp - COFF object file implementation ---------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file declares the COFFObjectFile class. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #include "llvm/ADT/ArrayRef.h" | |||
14 | #include "llvm/ADT/StringRef.h" | |||
15 | #include "llvm/ADT/StringSwitch.h" | |||
16 | #include "llvm/ADT/Triple.h" | |||
17 | #include "llvm/ADT/iterator_range.h" | |||
18 | #include "llvm/BinaryFormat/COFF.h" | |||
19 | #include "llvm/Object/Binary.h" | |||
20 | #include "llvm/Object/COFF.h" | |||
21 | #include "llvm/Object/Error.h" | |||
22 | #include "llvm/Object/ObjectFile.h" | |||
23 | #include "llvm/Support/BinaryStreamReader.h" | |||
24 | #include "llvm/Support/Endian.h" | |||
25 | #include "llvm/Support/Error.h" | |||
26 | #include "llvm/Support/ErrorHandling.h" | |||
27 | #include "llvm/Support/MathExtras.h" | |||
28 | #include "llvm/Support/MemoryBuffer.h" | |||
29 | #include <algorithm> | |||
30 | #include <cassert> | |||
31 | #include <cinttypes> | |||
32 | #include <cstddef> | |||
33 | #include <cstring> | |||
34 | #include <limits> | |||
35 | #include <memory> | |||
36 | #include <system_error> | |||
37 | ||||
38 | using namespace llvm; | |||
39 | using namespace object; | |||
40 | ||||
41 | using support::ulittle16_t; | |||
42 | using support::ulittle32_t; | |||
43 | using support::ulittle64_t; | |||
44 | using support::little16_t; | |||
45 | ||||
46 | // Returns false if size is greater than the buffer size. And sets ec. | |||
47 | static bool checkSize(MemoryBufferRef M, std::error_code &EC, uint64_t Size) { | |||
48 | if (M.getBufferSize() < Size) { | |||
49 | EC = object_error::unexpected_eof; | |||
50 | return false; | |||
51 | } | |||
52 | return true; | |||
53 | } | |||
54 | ||||
55 | // Sets Obj unless any bytes in [addr, addr + size) fall outsize of m. | |||
56 | // Returns unexpected_eof if error. | |||
57 | template <typename T> | |||
58 | static Error getObject(const T *&Obj, MemoryBufferRef M, const void *Ptr, | |||
59 | const uint64_t Size = sizeof(T)) { | |||
60 | uintptr_t Addr = reinterpret_cast<uintptr_t>(Ptr); | |||
61 | if (Error E = Binary::checkOffset(M, Addr, Size)) | |||
62 | return E; | |||
63 | Obj = reinterpret_cast<const T *>(Addr); | |||
64 | return Error::success(); | |||
65 | } | |||
66 | ||||
67 | // Decode a string table entry in base 64 (//AAAAAA). Expects \arg Str without | |||
68 | // prefixed slashes. | |||
69 | static bool decodeBase64StringEntry(StringRef Str, uint32_t &Result) { | |||
70 | assert(Str.size() <= 6 && "String too long, possible overflow.")((void)0); | |||
71 | if (Str.size() > 6) | |||
72 | return true; | |||
73 | ||||
74 | uint64_t Value = 0; | |||
75 | while (!Str.empty()) { | |||
76 | unsigned CharVal; | |||
77 | if (Str[0] >= 'A' && Str[0] <= 'Z') // 0..25 | |||
78 | CharVal = Str[0] - 'A'; | |||
79 | else if (Str[0] >= 'a' && Str[0] <= 'z') // 26..51 | |||
80 | CharVal = Str[0] - 'a' + 26; | |||
81 | else if (Str[0] >= '0' && Str[0] <= '9') // 52..61 | |||
82 | CharVal = Str[0] - '0' + 52; | |||
83 | else if (Str[0] == '+') // 62 | |||
84 | CharVal = 62; | |||
85 | else if (Str[0] == '/') // 63 | |||
86 | CharVal = 63; | |||
87 | else | |||
88 | return true; | |||
89 | ||||
90 | Value = (Value * 64) + CharVal; | |||
91 | Str = Str.substr(1); | |||
92 | } | |||
93 | ||||
94 | if (Value > std::numeric_limits<uint32_t>::max()) | |||
95 | return true; | |||
96 | ||||
97 | Result = static_cast<uint32_t>(Value); | |||
98 | return false; | |||
99 | } | |||
100 | ||||
101 | template <typename coff_symbol_type> | |||
102 | const coff_symbol_type *COFFObjectFile::toSymb(DataRefImpl Ref) const { | |||
103 | const coff_symbol_type *Addr = | |||
104 | reinterpret_cast<const coff_symbol_type *>(Ref.p); | |||
105 | ||||
106 | assert(!checkOffset(Data, reinterpret_cast<uintptr_t>(Addr), sizeof(*Addr)))((void)0); | |||
107 | #ifndef NDEBUG1 | |||
108 | // Verify that the symbol points to a valid entry in the symbol table. | |||
109 | uintptr_t Offset = | |||
110 | reinterpret_cast<uintptr_t>(Addr) - reinterpret_cast<uintptr_t>(base()); | |||
111 | ||||
112 | assert((Offset - getPointerToSymbolTable()) % sizeof(coff_symbol_type) == 0 &&((void)0) | |||
113 | "Symbol did not point to the beginning of a symbol")((void)0); | |||
114 | #endif | |||
115 | ||||
116 | return Addr; | |||
117 | } | |||
118 | ||||
119 | const coff_section *COFFObjectFile::toSec(DataRefImpl Ref) const { | |||
120 | const coff_section *Addr = reinterpret_cast<const coff_section*>(Ref.p); | |||
121 | ||||
122 | #ifndef NDEBUG1 | |||
123 | // Verify that the section points to a valid entry in the section table. | |||
124 | if (Addr < SectionTable || Addr >= (SectionTable + getNumberOfSections())) | |||
125 | report_fatal_error("Section was outside of section table."); | |||
126 | ||||
127 | uintptr_t Offset = reinterpret_cast<uintptr_t>(Addr) - | |||
128 | reinterpret_cast<uintptr_t>(SectionTable); | |||
129 | assert(Offset % sizeof(coff_section) == 0 &&((void)0) | |||
130 | "Section did not point to the beginning of a section")((void)0); | |||
131 | #endif | |||
132 | ||||
133 | return Addr; | |||
134 | } | |||
135 | ||||
136 | void COFFObjectFile::moveSymbolNext(DataRefImpl &Ref) const { | |||
137 | auto End = reinterpret_cast<uintptr_t>(StringTable); | |||
138 | if (SymbolTable16) { | |||
139 | const coff_symbol16 *Symb = toSymb<coff_symbol16>(Ref); | |||
140 | Symb += 1 + Symb->NumberOfAuxSymbols; | |||
141 | Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End); | |||
142 | } else if (SymbolTable32) { | |||
143 | const coff_symbol32 *Symb = toSymb<coff_symbol32>(Ref); | |||
144 | Symb += 1 + Symb->NumberOfAuxSymbols; | |||
145 | Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End); | |||
146 | } else { | |||
147 | llvm_unreachable("no symbol table pointer!")__builtin_unreachable(); | |||
148 | } | |||
149 | } | |||
150 | ||||
151 | Expected<StringRef> COFFObjectFile::getSymbolName(DataRefImpl Ref) const { | |||
152 | return getSymbolName(getCOFFSymbol(Ref)); | |||
153 | } | |||
154 | ||||
155 | uint64_t COFFObjectFile::getSymbolValueImpl(DataRefImpl Ref) const { | |||
156 | return getCOFFSymbol(Ref).getValue(); | |||
157 | } | |||
158 | ||||
159 | uint32_t COFFObjectFile::getSymbolAlignment(DataRefImpl Ref) const { | |||
160 | // MSVC/link.exe seems to align symbols to the next-power-of-2 | |||
161 | // up to 32 bytes. | |||
162 | COFFSymbolRef Symb = getCOFFSymbol(Ref); | |||
163 | return std::min(uint64_t(32), PowerOf2Ceil(Symb.getValue())); | |||
164 | } | |||
165 | ||||
166 | Expected<uint64_t> COFFObjectFile::getSymbolAddress(DataRefImpl Ref) const { | |||
167 | uint64_t Result = cantFail(getSymbolValue(Ref)); | |||
168 | COFFSymbolRef Symb = getCOFFSymbol(Ref); | |||
169 | int32_t SectionNumber = Symb.getSectionNumber(); | |||
170 | ||||
171 | if (Symb.isAnyUndefined() || Symb.isCommon() || | |||
172 | COFF::isReservedSectionNumber(SectionNumber)) | |||
173 | return Result; | |||
174 | ||||
175 | Expected<const coff_section *> Section = getSection(SectionNumber); | |||
176 | if (!Section) | |||
177 | return Section.takeError(); | |||
178 | Result += (*Section)->VirtualAddress; | |||
179 | ||||
180 | // The section VirtualAddress does not include ImageBase, and we want to | |||
181 | // return virtual addresses. | |||
182 | Result += getImageBase(); | |||
183 | ||||
184 | return Result; | |||
185 | } | |||
186 | ||||
187 | Expected<SymbolRef::Type> COFFObjectFile::getSymbolType(DataRefImpl Ref) const { | |||
188 | COFFSymbolRef Symb = getCOFFSymbol(Ref); | |||
189 | int32_t SectionNumber = Symb.getSectionNumber(); | |||
190 | ||||
191 | if (Symb.getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION) | |||
192 | return SymbolRef::ST_Function; | |||
193 | if (Symb.isAnyUndefined()) | |||
194 | return SymbolRef::ST_Unknown; | |||
195 | if (Symb.isCommon()) | |||
196 | return SymbolRef::ST_Data; | |||
197 | if (Symb.isFileRecord()) | |||
198 | return SymbolRef::ST_File; | |||
199 | ||||
200 | // TODO: perhaps we need a new symbol type ST_Section. | |||
201 | if (SectionNumber == COFF::IMAGE_SYM_DEBUG || Symb.isSectionDefinition()) | |||
202 | return SymbolRef::ST_Debug; | |||
203 | ||||
204 | if (!COFF::isReservedSectionNumber(SectionNumber)) | |||
205 | return SymbolRef::ST_Data; | |||
206 | ||||
207 | return SymbolRef::ST_Other; | |||
208 | } | |||
209 | ||||
210 | Expected<uint32_t> COFFObjectFile::getSymbolFlags(DataRefImpl Ref) const { | |||
211 | COFFSymbolRef Symb = getCOFFSymbol(Ref); | |||
212 | uint32_t Result = SymbolRef::SF_None; | |||
213 | ||||
214 | if (Symb.isExternal() || Symb.isWeakExternal()) | |||
215 | Result |= SymbolRef::SF_Global; | |||
216 | ||||
217 | if (const coff_aux_weak_external *AWE = Symb.getWeakExternal()) { | |||
218 | Result |= SymbolRef::SF_Weak; | |||
219 | if (AWE->Characteristics != COFF::IMAGE_WEAK_EXTERN_SEARCH_ALIAS) | |||
220 | Result |= SymbolRef::SF_Undefined; | |||
221 | } | |||
222 | ||||
223 | if (Symb.getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE) | |||
224 | Result |= SymbolRef::SF_Absolute; | |||
225 | ||||
226 | if (Symb.isFileRecord()) | |||
227 | Result |= SymbolRef::SF_FormatSpecific; | |||
228 | ||||
229 | if (Symb.isSectionDefinition()) | |||
230 | Result |= SymbolRef::SF_FormatSpecific; | |||
231 | ||||
232 | if (Symb.isCommon()) | |||
233 | Result |= SymbolRef::SF_Common; | |||
234 | ||||
235 | if (Symb.isUndefined()) | |||
236 | Result |= SymbolRef::SF_Undefined; | |||
237 | ||||
238 | return Result; | |||
239 | } | |||
240 | ||||
241 | uint64_t COFFObjectFile::getCommonSymbolSizeImpl(DataRefImpl Ref) const { | |||
242 | COFFSymbolRef Symb = getCOFFSymbol(Ref); | |||
243 | return Symb.getValue(); | |||
| ||||
244 | } | |||
245 | ||||
246 | Expected<section_iterator> | |||
247 | COFFObjectFile::getSymbolSection(DataRefImpl Ref) const { | |||
248 | COFFSymbolRef Symb = getCOFFSymbol(Ref); | |||
249 | if (COFF::isReservedSectionNumber(Symb.getSectionNumber())) | |||
250 | return section_end(); | |||
251 | Expected<const coff_section *> Sec = getSection(Symb.getSectionNumber()); | |||
252 | if (!Sec) | |||
253 | return Sec.takeError(); | |||
254 | DataRefImpl Ret; | |||
255 | Ret.p = reinterpret_cast<uintptr_t>(*Sec); | |||
256 | return section_iterator(SectionRef(Ret, this)); | |||
257 | } | |||
258 | ||||
259 | unsigned COFFObjectFile::getSymbolSectionID(SymbolRef Sym) const { | |||
260 | COFFSymbolRef Symb = getCOFFSymbol(Sym.getRawDataRefImpl()); | |||
261 | return Symb.getSectionNumber(); | |||
262 | } | |||
263 | ||||
264 | void COFFObjectFile::moveSectionNext(DataRefImpl &Ref) const { | |||
265 | const coff_section *Sec = toSec(Ref); | |||
266 | Sec += 1; | |||
267 | Ref.p = reinterpret_cast<uintptr_t>(Sec); | |||
268 | } | |||
269 | ||||
270 | Expected<StringRef> COFFObjectFile::getSectionName(DataRefImpl Ref) const { | |||
271 | const coff_section *Sec = toSec(Ref); | |||
272 | return getSectionName(Sec); | |||
273 | } | |||
274 | ||||
275 | uint64_t COFFObjectFile::getSectionAddress(DataRefImpl Ref) const { | |||
276 | const coff_section *Sec = toSec(Ref); | |||
277 | uint64_t Result = Sec->VirtualAddress; | |||
278 | ||||
279 | // The section VirtualAddress does not include ImageBase, and we want to | |||
280 | // return virtual addresses. | |||
281 | Result += getImageBase(); | |||
282 | return Result; | |||
283 | } | |||
284 | ||||
285 | uint64_t COFFObjectFile::getSectionIndex(DataRefImpl Sec) const { | |||
286 | return toSec(Sec) - SectionTable; | |||
287 | } | |||
288 | ||||
289 | uint64_t COFFObjectFile::getSectionSize(DataRefImpl Ref) const { | |||
290 | return getSectionSize(toSec(Ref)); | |||
291 | } | |||
292 | ||||
293 | Expected<ArrayRef<uint8_t>> | |||
294 | COFFObjectFile::getSectionContents(DataRefImpl Ref) const { | |||
295 | const coff_section *Sec = toSec(Ref); | |||
296 | ArrayRef<uint8_t> Res; | |||
297 | if (Error E = getSectionContents(Sec, Res)) | |||
298 | return std::move(E); | |||
299 | return Res; | |||
300 | } | |||
301 | ||||
302 | uint64_t COFFObjectFile::getSectionAlignment(DataRefImpl Ref) const { | |||
303 | const coff_section *Sec = toSec(Ref); | |||
304 | return Sec->getAlignment(); | |||
305 | } | |||
306 | ||||
307 | bool COFFObjectFile::isSectionCompressed(DataRefImpl Sec) const { | |||
308 | return false; | |||
309 | } | |||
310 | ||||
311 | bool COFFObjectFile::isSectionText(DataRefImpl Ref) const { | |||
312 | const coff_section *Sec = toSec(Ref); | |||
313 | return Sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE; | |||
314 | } | |||
315 | ||||
316 | bool COFFObjectFile::isSectionData(DataRefImpl Ref) const { | |||
317 | const coff_section *Sec = toSec(Ref); | |||
318 | return Sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA; | |||
319 | } | |||
320 | ||||
321 | bool COFFObjectFile::isSectionBSS(DataRefImpl Ref) const { | |||
322 | const coff_section *Sec = toSec(Ref); | |||
323 | const uint32_t BssFlags = COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA | | |||
324 | COFF::IMAGE_SCN_MEM_READ | | |||
325 | COFF::IMAGE_SCN_MEM_WRITE; | |||
326 | return (Sec->Characteristics & BssFlags) == BssFlags; | |||
327 | } | |||
328 | ||||
329 | // The .debug sections are the only debug sections for COFF | |||
330 | // (\see MCObjectFileInfo.cpp). | |||
331 | bool COFFObjectFile::isDebugSection(DataRefImpl Ref) const { | |||
332 | Expected<StringRef> SectionNameOrErr = getSectionName(Ref); | |||
333 | if (!SectionNameOrErr) { | |||
334 | // TODO: Report the error message properly. | |||
335 | consumeError(SectionNameOrErr.takeError()); | |||
336 | return false; | |||
337 | } | |||
338 | StringRef SectionName = SectionNameOrErr.get(); | |||
339 | return SectionName.startswith(".debug"); | |||
340 | } | |||
341 | ||||
342 | unsigned COFFObjectFile::getSectionID(SectionRef Sec) const { | |||
343 | uintptr_t Offset = | |||
344 | Sec.getRawDataRefImpl().p - reinterpret_cast<uintptr_t>(SectionTable); | |||
345 | assert((Offset % sizeof(coff_section)) == 0)((void)0); | |||
346 | return (Offset / sizeof(coff_section)) + 1; | |||
347 | } | |||
348 | ||||
349 | bool COFFObjectFile::isSectionVirtual(DataRefImpl Ref) const { | |||
350 | const coff_section *Sec = toSec(Ref); | |||
351 | // In COFF, a virtual section won't have any in-file | |||
352 | // content, so the file pointer to the content will be zero. | |||
353 | return Sec->PointerToRawData == 0; | |||
354 | } | |||
355 | ||||
356 | static uint32_t getNumberOfRelocations(const coff_section *Sec, | |||
357 | MemoryBufferRef M, const uint8_t *base) { | |||
358 | // The field for the number of relocations in COFF section table is only | |||
359 | // 16-bit wide. If a section has more than 65535 relocations, 0xFFFF is set to | |||
360 | // NumberOfRelocations field, and the actual relocation count is stored in the | |||
361 | // VirtualAddress field in the first relocation entry. | |||
362 | if (Sec->hasExtendedRelocations()) { | |||
363 | const coff_relocation *FirstReloc; | |||
364 | if (Error E = getObject(FirstReloc, M, | |||
365 | reinterpret_cast<const coff_relocation *>( | |||
366 | base + Sec->PointerToRelocations))) { | |||
367 | consumeError(std::move(E)); | |||
368 | return 0; | |||
369 | } | |||
370 | // -1 to exclude this first relocation entry. | |||
371 | return FirstReloc->VirtualAddress - 1; | |||
372 | } | |||
373 | return Sec->NumberOfRelocations; | |||
374 | } | |||
375 | ||||
376 | static const coff_relocation * | |||
377 | getFirstReloc(const coff_section *Sec, MemoryBufferRef M, const uint8_t *Base) { | |||
378 | uint64_t NumRelocs = getNumberOfRelocations(Sec, M, Base); | |||
379 | if (!NumRelocs) | |||
380 | return nullptr; | |||
381 | auto begin = reinterpret_cast<const coff_relocation *>( | |||
382 | Base + Sec->PointerToRelocations); | |||
383 | if (Sec->hasExtendedRelocations()) { | |||
384 | // Skip the first relocation entry repurposed to store the number of | |||
385 | // relocations. | |||
386 | begin++; | |||
387 | } | |||
388 | if (auto E = Binary::checkOffset(M, reinterpret_cast<uintptr_t>(begin), | |||
389 | sizeof(coff_relocation) * NumRelocs)) { | |||
390 | consumeError(std::move(E)); | |||
391 | return nullptr; | |||
392 | } | |||
393 | return begin; | |||
394 | } | |||
395 | ||||
396 | relocation_iterator COFFObjectFile::section_rel_begin(DataRefImpl Ref) const { | |||
397 | const coff_section *Sec = toSec(Ref); | |||
398 | const coff_relocation *begin = getFirstReloc(Sec, Data, base()); | |||
399 | if (begin && Sec->VirtualAddress != 0) | |||
400 | report_fatal_error("Sections with relocations should have an address of 0"); | |||
401 | DataRefImpl Ret; | |||
402 | Ret.p = reinterpret_cast<uintptr_t>(begin); | |||
403 | return relocation_iterator(RelocationRef(Ret, this)); | |||
404 | } | |||
405 | ||||
406 | relocation_iterator COFFObjectFile::section_rel_end(DataRefImpl Ref) const { | |||
407 | const coff_section *Sec = toSec(Ref); | |||
408 | const coff_relocation *I = getFirstReloc(Sec, Data, base()); | |||
409 | if (I) | |||
410 | I += getNumberOfRelocations(Sec, Data, base()); | |||
411 | DataRefImpl Ret; | |||
412 | Ret.p = reinterpret_cast<uintptr_t>(I); | |||
413 | return relocation_iterator(RelocationRef(Ret, this)); | |||
414 | } | |||
415 | ||||
416 | // Initialize the pointer to the symbol table. | |||
417 | Error COFFObjectFile::initSymbolTablePtr() { | |||
418 | if (COFFHeader) | |||
419 | if (Error E = getObject( | |||
420 | SymbolTable16, Data, base() + getPointerToSymbolTable(), | |||
421 | (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize())) | |||
422 | return E; | |||
423 | ||||
424 | if (COFFBigObjHeader) | |||
425 | if (Error E = getObject( | |||
426 | SymbolTable32, Data, base() + getPointerToSymbolTable(), | |||
427 | (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize())) | |||
428 | return E; | |||
429 | ||||
430 | // Find string table. The first four byte of the string table contains the | |||
431 | // total size of the string table, including the size field itself. If the | |||
432 | // string table is empty, the value of the first four byte would be 4. | |||
433 | uint32_t StringTableOffset = getPointerToSymbolTable() + | |||
434 | getNumberOfSymbols() * getSymbolTableEntrySize(); | |||
435 | const uint8_t *StringTableAddr = base() + StringTableOffset; | |||
436 | const ulittle32_t *StringTableSizePtr; | |||
437 | if (Error E = getObject(StringTableSizePtr, Data, StringTableAddr)) | |||
438 | return E; | |||
439 | StringTableSize = *StringTableSizePtr; | |||
440 | if (Error E = getObject(StringTable, Data, StringTableAddr, StringTableSize)) | |||
441 | return E; | |||
442 | ||||
443 | // Treat table sizes < 4 as empty because contrary to the PECOFF spec, some | |||
444 | // tools like cvtres write a size of 0 for an empty table instead of 4. | |||
445 | if (StringTableSize < 4) | |||
446 | StringTableSize = 4; | |||
447 | ||||
448 | // Check that the string table is null terminated if has any in it. | |||
449 | if (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0) | |||
450 | return errorCodeToError(object_error::parse_failed); | |||
451 | return Error::success(); | |||
452 | } | |||
453 | ||||
454 | uint64_t COFFObjectFile::getImageBase() const { | |||
455 | if (PE32Header) | |||
456 | return PE32Header->ImageBase; | |||
457 | else if (PE32PlusHeader) | |||
458 | return PE32PlusHeader->ImageBase; | |||
459 | // This actually comes up in practice. | |||
460 | return 0; | |||
461 | } | |||
462 | ||||
463 | // Returns the file offset for the given VA. | |||
464 | Error COFFObjectFile::getVaPtr(uint64_t Addr, uintptr_t &Res) const { | |||
465 | uint64_t ImageBase = getImageBase(); | |||
466 | uint64_t Rva = Addr - ImageBase; | |||
467 | assert(Rva <= UINT32_MAX)((void)0); | |||
468 | return getRvaPtr((uint32_t)Rva, Res); | |||
469 | } | |||
470 | ||||
471 | // Returns the file offset for the given RVA. | |||
472 | Error COFFObjectFile::getRvaPtr(uint32_t Addr, uintptr_t &Res) const { | |||
473 | for (const SectionRef &S : sections()) { | |||
474 | const coff_section *Section = getCOFFSection(S); | |||
475 | uint32_t SectionStart = Section->VirtualAddress; | |||
476 | uint32_t SectionEnd = Section->VirtualAddress + Section->VirtualSize; | |||
477 | if (SectionStart <= Addr && Addr < SectionEnd) { | |||
478 | uint32_t Offset = Addr - SectionStart; | |||
479 | Res = reinterpret_cast<uintptr_t>(base()) + Section->PointerToRawData + | |||
480 | Offset; | |||
481 | return Error::success(); | |||
482 | } | |||
483 | } | |||
484 | return errorCodeToError(object_error::parse_failed); | |||
485 | } | |||
486 | ||||
487 | Error COFFObjectFile::getRvaAndSizeAsBytes(uint32_t RVA, uint32_t Size, | |||
488 | ArrayRef<uint8_t> &Contents) const { | |||
489 | for (const SectionRef &S : sections()) { | |||
490 | const coff_section *Section = getCOFFSection(S); | |||
491 | uint32_t SectionStart = Section->VirtualAddress; | |||
492 | // Check if this RVA is within the section bounds. Be careful about integer | |||
493 | // overflow. | |||
494 | uint32_t OffsetIntoSection = RVA - SectionStart; | |||
495 | if (SectionStart <= RVA && OffsetIntoSection < Section->VirtualSize && | |||
496 | Size <= Section->VirtualSize - OffsetIntoSection) { | |||
497 | uintptr_t Begin = reinterpret_cast<uintptr_t>(base()) + | |||
498 | Section->PointerToRawData + OffsetIntoSection; | |||
499 | Contents = | |||
500 | ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Begin), Size); | |||
501 | return Error::success(); | |||
502 | } | |||
503 | } | |||
504 | return errorCodeToError(object_error::parse_failed); | |||
505 | } | |||
506 | ||||
507 | // Returns hint and name fields, assuming \p Rva is pointing to a Hint/Name | |||
508 | // table entry. | |||
509 | Error COFFObjectFile::getHintName(uint32_t Rva, uint16_t &Hint, | |||
510 | StringRef &Name) const { | |||
511 | uintptr_t IntPtr = 0; | |||
512 | if (Error E = getRvaPtr(Rva, IntPtr)) | |||
513 | return E; | |||
514 | const uint8_t *Ptr = reinterpret_cast<const uint8_t *>(IntPtr); | |||
515 | Hint = *reinterpret_cast<const ulittle16_t *>(Ptr); | |||
516 | Name = StringRef(reinterpret_cast<const char *>(Ptr + 2)); | |||
517 | return Error::success(); | |||
518 | } | |||
519 | ||||
520 | Error COFFObjectFile::getDebugPDBInfo(const debug_directory *DebugDir, | |||
521 | const codeview::DebugInfo *&PDBInfo, | |||
522 | StringRef &PDBFileName) const { | |||
523 | ArrayRef<uint8_t> InfoBytes; | |||
524 | if (Error E = getRvaAndSizeAsBytes( | |||
525 | DebugDir->AddressOfRawData, DebugDir->SizeOfData, InfoBytes)) | |||
526 | return E; | |||
527 | if (InfoBytes.size() < sizeof(*PDBInfo) + 1) | |||
528 | return errorCodeToError(object_error::parse_failed); | |||
529 | PDBInfo = reinterpret_cast<const codeview::DebugInfo *>(InfoBytes.data()); | |||
530 | InfoBytes = InfoBytes.drop_front(sizeof(*PDBInfo)); | |||
531 | PDBFileName = StringRef(reinterpret_cast<const char *>(InfoBytes.data()), | |||
532 | InfoBytes.size()); | |||
533 | // Truncate the name at the first null byte. Ignore any padding. | |||
534 | PDBFileName = PDBFileName.split('\0').first; | |||
535 | return Error::success(); | |||
536 | } | |||
537 | ||||
538 | Error COFFObjectFile::getDebugPDBInfo(const codeview::DebugInfo *&PDBInfo, | |||
539 | StringRef &PDBFileName) const { | |||
540 | for (const debug_directory &D : debug_directories()) | |||
541 | if (D.Type == COFF::IMAGE_DEBUG_TYPE_CODEVIEW) | |||
542 | return getDebugPDBInfo(&D, PDBInfo, PDBFileName); | |||
543 | // If we get here, there is no PDB info to return. | |||
544 | PDBInfo = nullptr; | |||
545 | PDBFileName = StringRef(); | |||
546 | return Error::success(); | |||
547 | } | |||
548 | ||||
549 | // Find the import table. | |||
550 | Error COFFObjectFile::initImportTablePtr() { | |||
551 | // First, we get the RVA of the import table. If the file lacks a pointer to | |||
552 | // the import table, do nothing. | |||
553 | const data_directory *DataEntry = getDataDirectory(COFF::IMPORT_TABLE); | |||
554 | if (!DataEntry) | |||
555 | return Error::success(); | |||
556 | ||||
557 | // Do nothing if the pointer to import table is NULL. | |||
558 | if (DataEntry->RelativeVirtualAddress == 0) | |||
559 | return Error::success(); | |||
560 | ||||
561 | uint32_t ImportTableRva = DataEntry->RelativeVirtualAddress; | |||
562 | ||||
563 | // Find the section that contains the RVA. This is needed because the RVA is | |||
564 | // the import table's memory address which is different from its file offset. | |||
565 | uintptr_t IntPtr = 0; | |||
566 | if (Error E = getRvaPtr(ImportTableRva, IntPtr)) | |||
567 | return E; | |||
568 | if (Error E = checkOffset(Data, IntPtr, DataEntry->Size)) | |||
569 | return E; | |||
570 | ImportDirectory = reinterpret_cast< | |||
571 | const coff_import_directory_table_entry *>(IntPtr); | |||
572 | return Error::success(); | |||
573 | } | |||
574 | ||||
575 | // Initializes DelayImportDirectory and NumberOfDelayImportDirectory. | |||
576 | Error COFFObjectFile::initDelayImportTablePtr() { | |||
577 | const data_directory *DataEntry = | |||
578 | getDataDirectory(COFF::DELAY_IMPORT_DESCRIPTOR); | |||
579 | if (!DataEntry) | |||
580 | return Error::success(); | |||
581 | if (DataEntry->RelativeVirtualAddress == 0) | |||
582 | return Error::success(); | |||
583 | ||||
584 | uint32_t RVA = DataEntry->RelativeVirtualAddress; | |||
585 | NumberOfDelayImportDirectory = DataEntry->Size / | |||
586 | sizeof(delay_import_directory_table_entry) - 1; | |||
587 | ||||
588 | uintptr_t IntPtr = 0; | |||
589 | if (Error E = getRvaPtr(RVA, IntPtr)) | |||
590 | return E; | |||
591 | DelayImportDirectory = reinterpret_cast< | |||
592 | const delay_import_directory_table_entry *>(IntPtr); | |||
593 | return Error::success(); | |||
594 | } | |||
595 | ||||
596 | // Find the export table. | |||
597 | Error COFFObjectFile::initExportTablePtr() { | |||
598 | // First, we get the RVA of the export table. If the file lacks a pointer to | |||
599 | // the export table, do nothing. | |||
600 | const data_directory *DataEntry = getDataDirectory(COFF::EXPORT_TABLE); | |||
601 | if (!DataEntry) | |||
602 | return Error::success(); | |||
603 | ||||
604 | // Do nothing if the pointer to export table is NULL. | |||
605 | if (DataEntry->RelativeVirtualAddress == 0) | |||
606 | return Error::success(); | |||
607 | ||||
608 | uint32_t ExportTableRva = DataEntry->RelativeVirtualAddress; | |||
609 | uintptr_t IntPtr = 0; | |||
610 | if (Error E = getRvaPtr(ExportTableRva, IntPtr)) | |||
611 | return E; | |||
612 | ExportDirectory = | |||
613 | reinterpret_cast<const export_directory_table_entry *>(IntPtr); | |||
614 | return Error::success(); | |||
615 | } | |||
616 | ||||
617 | Error COFFObjectFile::initBaseRelocPtr() { | |||
618 | const data_directory *DataEntry = | |||
619 | getDataDirectory(COFF::BASE_RELOCATION_TABLE); | |||
620 | if (!DataEntry) | |||
621 | return Error::success(); | |||
622 | if (DataEntry->RelativeVirtualAddress == 0) | |||
623 | return Error::success(); | |||
624 | ||||
625 | uintptr_t IntPtr = 0; | |||
626 | if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) | |||
627 | return E; | |||
628 | BaseRelocHeader = reinterpret_cast<const coff_base_reloc_block_header *>( | |||
629 | IntPtr); | |||
630 | BaseRelocEnd = reinterpret_cast<coff_base_reloc_block_header *>( | |||
631 | IntPtr + DataEntry->Size); | |||
632 | // FIXME: Verify the section containing BaseRelocHeader has at least | |||
633 | // DataEntry->Size bytes after DataEntry->RelativeVirtualAddress. | |||
634 | return Error::success(); | |||
635 | } | |||
636 | ||||
637 | Error COFFObjectFile::initDebugDirectoryPtr() { | |||
638 | // Get the RVA of the debug directory. Do nothing if it does not exist. | |||
639 | const data_directory *DataEntry = getDataDirectory(COFF::DEBUG_DIRECTORY); | |||
640 | if (!DataEntry) | |||
641 | return Error::success(); | |||
642 | ||||
643 | // Do nothing if the RVA is NULL. | |||
644 | if (DataEntry->RelativeVirtualAddress == 0) | |||
645 | return Error::success(); | |||
646 | ||||
647 | // Check that the size is a multiple of the entry size. | |||
648 | if (DataEntry->Size % sizeof(debug_directory) != 0) | |||
649 | return errorCodeToError(object_error::parse_failed); | |||
650 | ||||
651 | uintptr_t IntPtr = 0; | |||
652 | if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) | |||
653 | return E; | |||
654 | DebugDirectoryBegin = reinterpret_cast<const debug_directory *>(IntPtr); | |||
655 | DebugDirectoryEnd = reinterpret_cast<const debug_directory *>( | |||
656 | IntPtr + DataEntry->Size); | |||
657 | // FIXME: Verify the section containing DebugDirectoryBegin has at least | |||
658 | // DataEntry->Size bytes after DataEntry->RelativeVirtualAddress. | |||
659 | return Error::success(); | |||
660 | } | |||
661 | ||||
662 | Error COFFObjectFile::initTLSDirectoryPtr() { | |||
663 | // Get the RVA of the TLS directory. Do nothing if it does not exist. | |||
664 | const data_directory *DataEntry = getDataDirectory(COFF::TLS_TABLE); | |||
665 | if (!DataEntry) | |||
666 | return Error::success(); | |||
667 | ||||
668 | // Do nothing if the RVA is NULL. | |||
669 | if (DataEntry->RelativeVirtualAddress == 0) | |||
670 | return Error::success(); | |||
671 | ||||
672 | uint64_t DirSize = | |||
673 | is64() ? sizeof(coff_tls_directory64) : sizeof(coff_tls_directory32); | |||
674 | ||||
675 | // Check that the size is correct. | |||
676 | if (DataEntry->Size != DirSize) | |||
677 | return createStringError( | |||
678 | object_error::parse_failed, | |||
679 | "TLS Directory size (%u) is not the expected size (%" PRIu64"llu" ").", | |||
680 | static_cast<uint32_t>(DataEntry->Size), DirSize); | |||
681 | ||||
682 | uintptr_t IntPtr = 0; | |||
683 | if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) | |||
684 | return E; | |||
685 | ||||
686 | if (is64()) | |||
687 | TLSDirectory64 = reinterpret_cast<const coff_tls_directory64 *>(IntPtr); | |||
688 | else | |||
689 | TLSDirectory32 = reinterpret_cast<const coff_tls_directory32 *>(IntPtr); | |||
690 | ||||
691 | return Error::success(); | |||
692 | } | |||
693 | ||||
694 | Error COFFObjectFile::initLoadConfigPtr() { | |||
695 | // Get the RVA of the debug directory. Do nothing if it does not exist. | |||
696 | const data_directory *DataEntry = getDataDirectory(COFF::LOAD_CONFIG_TABLE); | |||
697 | if (!DataEntry) | |||
698 | return Error::success(); | |||
699 | ||||
700 | // Do nothing if the RVA is NULL. | |||
701 | if (DataEntry->RelativeVirtualAddress == 0) | |||
702 | return Error::success(); | |||
703 | uintptr_t IntPtr = 0; | |||
704 | if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) | |||
705 | return E; | |||
706 | ||||
707 | LoadConfig = (const void *)IntPtr; | |||
708 | return Error::success(); | |||
709 | } | |||
710 | ||||
711 | Expected<std::unique_ptr<COFFObjectFile>> | |||
712 | COFFObjectFile::create(MemoryBufferRef Object) { | |||
713 | std::unique_ptr<COFFObjectFile> Obj(new COFFObjectFile(std::move(Object))); | |||
714 | if (Error E = Obj->initialize()) | |||
715 | return std::move(E); | |||
716 | return std::move(Obj); | |||
717 | } | |||
718 | ||||
719 | COFFObjectFile::COFFObjectFile(MemoryBufferRef Object) | |||
720 | : ObjectFile(Binary::ID_COFF, Object), COFFHeader(nullptr), | |||
721 | COFFBigObjHeader(nullptr), PE32Header(nullptr), PE32PlusHeader(nullptr), | |||
722 | DataDirectory(nullptr), SectionTable(nullptr), SymbolTable16(nullptr), | |||
723 | SymbolTable32(nullptr), StringTable(nullptr), StringTableSize(0), | |||
724 | ImportDirectory(nullptr), DelayImportDirectory(nullptr), | |||
725 | NumberOfDelayImportDirectory(0), ExportDirectory(nullptr), | |||
726 | BaseRelocHeader(nullptr), BaseRelocEnd(nullptr), | |||
727 | DebugDirectoryBegin(nullptr), DebugDirectoryEnd(nullptr), | |||
728 | TLSDirectory32(nullptr), TLSDirectory64(nullptr) {} | |||
729 | ||||
730 | Error COFFObjectFile::initialize() { | |||
731 | // Check that we at least have enough room for a header. | |||
732 | std::error_code EC; | |||
733 | if (!checkSize(Data, EC, sizeof(coff_file_header))) | |||
734 | return errorCodeToError(EC); | |||
735 | ||||
736 | // The current location in the file where we are looking at. | |||
737 | uint64_t CurPtr = 0; | |||
738 | ||||
739 | // PE header is optional and is present only in executables. If it exists, | |||
740 | // it is placed right after COFF header. | |||
741 | bool HasPEHeader = false; | |||
742 | ||||
743 | // Check if this is a PE/COFF file. | |||
744 | if (checkSize(Data, EC, sizeof(dos_header) + sizeof(COFF::PEMagic))) { | |||
745 | // PE/COFF, seek through MS-DOS compatibility stub and 4-byte | |||
746 | // PE signature to find 'normal' COFF header. | |||
747 | const auto *DH = reinterpret_cast<const dos_header *>(base()); | |||
748 | if (DH->Magic[0] == 'M' && DH->Magic[1] == 'Z') { | |||
749 | CurPtr = DH->AddressOfNewExeHeader; | |||
750 | // Check the PE magic bytes. ("PE\0\0") | |||
751 | if (memcmp(base() + CurPtr, COFF::PEMagic, sizeof(COFF::PEMagic)) != 0) { | |||
752 | return errorCodeToError(object_error::parse_failed); | |||
753 | } | |||
754 | CurPtr += sizeof(COFF::PEMagic); // Skip the PE magic bytes. | |||
755 | HasPEHeader = true; | |||
756 | } | |||
757 | } | |||
758 | ||||
759 | if (Error E = getObject(COFFHeader, Data, base() + CurPtr)) | |||
760 | return E; | |||
761 | ||||
762 | // It might be a bigobj file, let's check. Note that COFF bigobj and COFF | |||
763 | // import libraries share a common prefix but bigobj is more restrictive. | |||
764 | if (!HasPEHeader && COFFHeader->Machine == COFF::IMAGE_FILE_MACHINE_UNKNOWN && | |||
765 | COFFHeader->NumberOfSections == uint16_t(0xffff) && | |||
766 | checkSize(Data, EC, sizeof(coff_bigobj_file_header))) { | |||
767 | if (Error E = getObject(COFFBigObjHeader, Data, base() + CurPtr)) | |||
768 | return E; | |||
769 | ||||
770 | // Verify that we are dealing with bigobj. | |||
771 | if (COFFBigObjHeader->Version >= COFF::BigObjHeader::MinBigObjectVersion && | |||
772 | std::memcmp(COFFBigObjHeader->UUID, COFF::BigObjMagic, | |||
773 | sizeof(COFF::BigObjMagic)) == 0) { | |||
774 | COFFHeader = nullptr; | |||
775 | CurPtr += sizeof(coff_bigobj_file_header); | |||
776 | } else { | |||
777 | // It's not a bigobj. | |||
778 | COFFBigObjHeader = nullptr; | |||
779 | } | |||
780 | } | |||
781 | if (COFFHeader) { | |||
782 | // The prior checkSize call may have failed. This isn't a hard error | |||
783 | // because we were just trying to sniff out bigobj. | |||
784 | EC = std::error_code(); | |||
785 | CurPtr += sizeof(coff_file_header); | |||
786 | ||||
787 | if (COFFHeader->isImportLibrary()) | |||
788 | return errorCodeToError(EC); | |||
789 | } | |||
790 | ||||
791 | if (HasPEHeader) { | |||
792 | const pe32_header *Header; | |||
793 | if (Error E = getObject(Header, Data, base() + CurPtr)) | |||
794 | return E; | |||
795 | ||||
796 | const uint8_t *DataDirAddr; | |||
797 | uint64_t DataDirSize; | |||
798 | if (Header->Magic == COFF::PE32Header::PE32) { | |||
799 | PE32Header = Header; | |||
800 | DataDirAddr = base() + CurPtr + sizeof(pe32_header); | |||
801 | DataDirSize = sizeof(data_directory) * PE32Header->NumberOfRvaAndSize; | |||
802 | } else if (Header->Magic == COFF::PE32Header::PE32_PLUS) { | |||
803 | PE32PlusHeader = reinterpret_cast<const pe32plus_header *>(Header); | |||
804 | DataDirAddr = base() + CurPtr + sizeof(pe32plus_header); | |||
805 | DataDirSize = sizeof(data_directory) * PE32PlusHeader->NumberOfRvaAndSize; | |||
806 | } else { | |||
807 | // It's neither PE32 nor PE32+. | |||
808 | return errorCodeToError(object_error::parse_failed); | |||
809 | } | |||
810 | if (Error E = getObject(DataDirectory, Data, DataDirAddr, DataDirSize)) | |||
811 | return E; | |||
812 | } | |||
813 | ||||
814 | if (COFFHeader) | |||
815 | CurPtr += COFFHeader->SizeOfOptionalHeader; | |||
816 | ||||
817 | assert(COFFHeader || COFFBigObjHeader)((void)0); | |||
818 | ||||
819 | if (Error E = | |||
820 | getObject(SectionTable, Data, base() + CurPtr, | |||
821 | (uint64_t)getNumberOfSections() * sizeof(coff_section))) | |||
822 | return E; | |||
823 | ||||
824 | // Initialize the pointer to the symbol table. | |||
825 | if (getPointerToSymbolTable() != 0) { | |||
826 | if (Error E = initSymbolTablePtr()) { | |||
827 | // Recover from errors reading the symbol table. | |||
828 | consumeError(std::move(E)); | |||
829 | SymbolTable16 = nullptr; | |||
830 | SymbolTable32 = nullptr; | |||
831 | StringTable = nullptr; | |||
832 | StringTableSize = 0; | |||
833 | } | |||
834 | } else { | |||
835 | // We had better not have any symbols if we don't have a symbol table. | |||
836 | if (getNumberOfSymbols() != 0) { | |||
837 | return errorCodeToError(object_error::parse_failed); | |||
838 | } | |||
839 | } | |||
840 | ||||
841 | // Initialize the pointer to the beginning of the import table. | |||
842 | if (Error E = initImportTablePtr()) | |||
843 | return E; | |||
844 | if (Error E = initDelayImportTablePtr()) | |||
845 | return E; | |||
846 | ||||
847 | // Initialize the pointer to the export table. | |||
848 | if (Error E = initExportTablePtr()) | |||
849 | return E; | |||
850 | ||||
851 | // Initialize the pointer to the base relocation table. | |||
852 | if (Error E = initBaseRelocPtr()) | |||
853 | return E; | |||
854 | ||||
855 | // Initialize the pointer to the debug directory. | |||
856 | if (Error E = initDebugDirectoryPtr()) | |||
857 | return E; | |||
858 | ||||
859 | // Initialize the pointer to the TLS directory. | |||
860 | if (Error E = initTLSDirectoryPtr()) | |||
861 | return E; | |||
862 | ||||
863 | if (Error E = initLoadConfigPtr()) | |||
864 | return E; | |||
865 | ||||
866 | return Error::success(); | |||
867 | } | |||
868 | ||||
869 | basic_symbol_iterator COFFObjectFile::symbol_begin() const { | |||
870 | DataRefImpl Ret; | |||
871 | Ret.p = getSymbolTable(); | |||
872 | return basic_symbol_iterator(SymbolRef(Ret, this)); | |||
873 | } | |||
874 | ||||
875 | basic_symbol_iterator COFFObjectFile::symbol_end() const { | |||
876 | // The symbol table ends where the string table begins. | |||
877 | DataRefImpl Ret; | |||
878 | Ret.p = reinterpret_cast<uintptr_t>(StringTable); | |||
879 | return basic_symbol_iterator(SymbolRef(Ret, this)); | |||
880 | } | |||
881 | ||||
882 | import_directory_iterator COFFObjectFile::import_directory_begin() const { | |||
883 | if (!ImportDirectory) | |||
884 | return import_directory_end(); | |||
885 | if (ImportDirectory->isNull()) | |||
886 | return import_directory_end(); | |||
887 | return import_directory_iterator( | |||
888 | ImportDirectoryEntryRef(ImportDirectory, 0, this)); | |||
889 | } | |||
890 | ||||
891 | import_directory_iterator COFFObjectFile::import_directory_end() const { | |||
892 | return import_directory_iterator( | |||
893 | ImportDirectoryEntryRef(nullptr, -1, this)); | |||
894 | } | |||
895 | ||||
896 | delay_import_directory_iterator | |||
897 | COFFObjectFile::delay_import_directory_begin() const { | |||
898 | return delay_import_directory_iterator( | |||
899 | DelayImportDirectoryEntryRef(DelayImportDirectory, 0, this)); | |||
900 | } | |||
901 | ||||
902 | delay_import_directory_iterator | |||
903 | COFFObjectFile::delay_import_directory_end() const { | |||
904 | return delay_import_directory_iterator( | |||
905 | DelayImportDirectoryEntryRef( | |||
906 | DelayImportDirectory, NumberOfDelayImportDirectory, this)); | |||
907 | } | |||
908 | ||||
909 | export_directory_iterator COFFObjectFile::export_directory_begin() const { | |||
910 | return export_directory_iterator( | |||
911 | ExportDirectoryEntryRef(ExportDirectory, 0, this)); | |||
912 | } | |||
913 | ||||
914 | export_directory_iterator COFFObjectFile::export_directory_end() const { | |||
915 | if (!ExportDirectory) | |||
916 | return export_directory_iterator(ExportDirectoryEntryRef(nullptr, 0, this)); | |||
917 | ExportDirectoryEntryRef Ref(ExportDirectory, | |||
918 | ExportDirectory->AddressTableEntries, this); | |||
919 | return export_directory_iterator(Ref); | |||
920 | } | |||
921 | ||||
922 | section_iterator COFFObjectFile::section_begin() const { | |||
923 | DataRefImpl Ret; | |||
924 | Ret.p = reinterpret_cast<uintptr_t>(SectionTable); | |||
925 | return section_iterator(SectionRef(Ret, this)); | |||
926 | } | |||
927 | ||||
928 | section_iterator COFFObjectFile::section_end() const { | |||
929 | DataRefImpl Ret; | |||
930 | int NumSections = | |||
931 | COFFHeader && COFFHeader->isImportLibrary() ? 0 : getNumberOfSections(); | |||
932 | Ret.p = reinterpret_cast<uintptr_t>(SectionTable + NumSections); | |||
933 | return section_iterator(SectionRef(Ret, this)); | |||
934 | } | |||
935 | ||||
936 | base_reloc_iterator COFFObjectFile::base_reloc_begin() const { | |||
937 | return base_reloc_iterator(BaseRelocRef(BaseRelocHeader, this)); | |||
938 | } | |||
939 | ||||
940 | base_reloc_iterator COFFObjectFile::base_reloc_end() const { | |||
941 | return base_reloc_iterator(BaseRelocRef(BaseRelocEnd, this)); | |||
942 | } | |||
943 | ||||
944 | uint8_t COFFObjectFile::getBytesInAddress() const { | |||
945 | return getArch() == Triple::x86_64 || getArch() == Triple::aarch64 ? 8 : 4; | |||
946 | } | |||
947 | ||||
948 | StringRef COFFObjectFile::getFileFormatName() const { | |||
949 | switch(getMachine()) { | |||
950 | case COFF::IMAGE_FILE_MACHINE_I386: | |||
951 | return "COFF-i386"; | |||
952 | case COFF::IMAGE_FILE_MACHINE_AMD64: | |||
953 | return "COFF-x86-64"; | |||
954 | case COFF::IMAGE_FILE_MACHINE_ARMNT: | |||
955 | return "COFF-ARM"; | |||
956 | case COFF::IMAGE_FILE_MACHINE_ARM64: | |||
957 | return "COFF-ARM64"; | |||
958 | default: | |||
959 | return "COFF-<unknown arch>"; | |||
960 | } | |||
961 | } | |||
962 | ||||
963 | Triple::ArchType COFFObjectFile::getArch() const { | |||
964 | switch (getMachine()) { | |||
965 | case COFF::IMAGE_FILE_MACHINE_I386: | |||
966 | return Triple::x86; | |||
967 | case COFF::IMAGE_FILE_MACHINE_AMD64: | |||
968 | return Triple::x86_64; | |||
969 | case COFF::IMAGE_FILE_MACHINE_ARMNT: | |||
970 | return Triple::thumb; | |||
971 | case COFF::IMAGE_FILE_MACHINE_ARM64: | |||
972 | return Triple::aarch64; | |||
973 | default: | |||
974 | return Triple::UnknownArch; | |||
975 | } | |||
976 | } | |||
977 | ||||
978 | Expected<uint64_t> COFFObjectFile::getStartAddress() const { | |||
979 | if (PE32Header) | |||
980 | return PE32Header->AddressOfEntryPoint; | |||
981 | return 0; | |||
982 | } | |||
983 | ||||
984 | iterator_range<import_directory_iterator> | |||
985 | COFFObjectFile::import_directories() const { | |||
986 | return make_range(import_directory_begin(), import_directory_end()); | |||
987 | } | |||
988 | ||||
989 | iterator_range<delay_import_directory_iterator> | |||
990 | COFFObjectFile::delay_import_directories() const { | |||
991 | return make_range(delay_import_directory_begin(), | |||
992 | delay_import_directory_end()); | |||
993 | } | |||
994 | ||||
995 | iterator_range<export_directory_iterator> | |||
996 | COFFObjectFile::export_directories() const { | |||
997 | return make_range(export_directory_begin(), export_directory_end()); | |||
998 | } | |||
999 | ||||
1000 | iterator_range<base_reloc_iterator> COFFObjectFile::base_relocs() const { | |||
1001 | return make_range(base_reloc_begin(), base_reloc_end()); | |||
1002 | } | |||
1003 | ||||
1004 | const data_directory *COFFObjectFile::getDataDirectory(uint32_t Index) const { | |||
1005 | if (!DataDirectory) | |||
1006 | return nullptr; | |||
1007 | assert(PE32Header || PE32PlusHeader)((void)0); | |||
1008 | uint32_t NumEnt = PE32Header ? PE32Header->NumberOfRvaAndSize | |||
1009 | : PE32PlusHeader->NumberOfRvaAndSize; | |||
1010 | if (Index >= NumEnt) | |||
1011 | return nullptr; | |||
1012 | return &DataDirectory[Index]; | |||
1013 | } | |||
1014 | ||||
1015 | Expected<const coff_section *> COFFObjectFile::getSection(int32_t Index) const { | |||
1016 | // Perhaps getting the section of a reserved section index should be an error, | |||
1017 | // but callers rely on this to return null. | |||
1018 | if (COFF::isReservedSectionNumber(Index)) | |||
1019 | return (const coff_section *)nullptr; | |||
1020 | if (static_cast<uint32_t>(Index) <= getNumberOfSections()) { | |||
1021 | // We already verified the section table data, so no need to check again. | |||
1022 | return SectionTable + (Index - 1); | |||
1023 | } | |||
1024 | return errorCodeToError(object_error::parse_failed); | |||
1025 | } | |||
1026 | ||||
1027 | Expected<StringRef> COFFObjectFile::getString(uint32_t Offset) const { | |||
1028 | if (StringTableSize <= 4) | |||
1029 | // Tried to get a string from an empty string table. | |||
1030 | return errorCodeToError(object_error::parse_failed); | |||
1031 | if (Offset >= StringTableSize) | |||
1032 | return errorCodeToError(object_error::unexpected_eof); | |||
1033 | return StringRef(StringTable + Offset); | |||
1034 | } | |||
1035 | ||||
1036 | Expected<StringRef> COFFObjectFile::getSymbolName(COFFSymbolRef Symbol) const { | |||
1037 | return getSymbolName(Symbol.getGeneric()); | |||
1038 | } | |||
1039 | ||||
1040 | Expected<StringRef> | |||
1041 | COFFObjectFile::getSymbolName(const coff_symbol_generic *Symbol) const { | |||
1042 | // Check for string table entry. First 4 bytes are 0. | |||
1043 | if (Symbol->Name.Offset.Zeroes == 0) | |||
1044 | return getString(Symbol->Name.Offset.Offset); | |||
1045 | ||||
1046 | // Null terminated, let ::strlen figure out the length. | |||
1047 | if (Symbol->Name.ShortName[COFF::NameSize - 1] == 0) | |||
1048 | return StringRef(Symbol->Name.ShortName); | |||
1049 | ||||
1050 | // Not null terminated, use all 8 bytes. | |||
1051 | return StringRef(Symbol->Name.ShortName, COFF::NameSize); | |||
1052 | } | |||
1053 | ||||
1054 | ArrayRef<uint8_t> | |||
1055 | COFFObjectFile::getSymbolAuxData(COFFSymbolRef Symbol) const { | |||
1056 | const uint8_t *Aux = nullptr; | |||
1057 | ||||
1058 | size_t SymbolSize = getSymbolTableEntrySize(); | |||
1059 | if (Symbol.getNumberOfAuxSymbols() > 0) { | |||
1060 | // AUX data comes immediately after the symbol in COFF | |||
1061 | Aux = reinterpret_cast<const uint8_t *>(Symbol.getRawPtr()) + SymbolSize; | |||
1062 | #ifndef NDEBUG1 | |||
1063 | // Verify that the Aux symbol points to a valid entry in the symbol table. | |||
1064 | uintptr_t Offset = uintptr_t(Aux) - uintptr_t(base()); | |||
1065 | if (Offset < getPointerToSymbolTable() || | |||
1066 | Offset >= | |||
1067 | getPointerToSymbolTable() + (getNumberOfSymbols() * SymbolSize)) | |||
1068 | report_fatal_error("Aux Symbol data was outside of symbol table."); | |||
1069 | ||||
1070 | assert((Offset - getPointerToSymbolTable()) % SymbolSize == 0 &&((void)0) | |||
1071 | "Aux Symbol data did not point to the beginning of a symbol")((void)0); | |||
1072 | #endif | |||
1073 | } | |||
1074 | return makeArrayRef(Aux, Symbol.getNumberOfAuxSymbols() * SymbolSize); | |||
1075 | } | |||
1076 | ||||
1077 | uint32_t COFFObjectFile::getSymbolIndex(COFFSymbolRef Symbol) const { | |||
1078 | uintptr_t Offset = | |||
1079 | reinterpret_cast<uintptr_t>(Symbol.getRawPtr()) - getSymbolTable(); | |||
1080 | assert(Offset % getSymbolTableEntrySize() == 0 &&((void)0) | |||
1081 | "Symbol did not point to the beginning of a symbol")((void)0); | |||
1082 | size_t Index = Offset / getSymbolTableEntrySize(); | |||
1083 | assert(Index < getNumberOfSymbols())((void)0); | |||
1084 | return Index; | |||
1085 | } | |||
1086 | ||||
1087 | Expected<StringRef> | |||
1088 | COFFObjectFile::getSectionName(const coff_section *Sec) const { | |||
1089 | StringRef Name; | |||
1090 | if (Sec->Name[COFF::NameSize - 1] == 0) | |||
1091 | // Null terminated, let ::strlen figure out the length. | |||
1092 | Name = Sec->Name; | |||
1093 | else | |||
1094 | // Not null terminated, use all 8 bytes. | |||
1095 | Name = StringRef(Sec->Name, COFF::NameSize); | |||
1096 | ||||
1097 | // Check for string table entry. First byte is '/'. | |||
1098 | if (Name.startswith("/")) { | |||
1099 | uint32_t Offset; | |||
1100 | if (Name.startswith("//")) { | |||
1101 | if (decodeBase64StringEntry(Name.substr(2), Offset)) | |||
1102 | return createStringError(object_error::parse_failed, | |||
1103 | "invalid section name"); | |||
1104 | } else { | |||
1105 | if (Name.substr(1).getAsInteger(10, Offset)) | |||
1106 | return createStringError(object_error::parse_failed, | |||
1107 | "invalid section name"); | |||
1108 | } | |||
1109 | return getString(Offset); | |||
1110 | } | |||
1111 | ||||
1112 | return Name; | |||
1113 | } | |||
1114 | ||||
1115 | uint64_t COFFObjectFile::getSectionSize(const coff_section *Sec) const { | |||
1116 | // SizeOfRawData and VirtualSize change what they represent depending on | |||
1117 | // whether or not we have an executable image. | |||
1118 | // | |||
1119 | // For object files, SizeOfRawData contains the size of section's data; | |||
1120 | // VirtualSize should be zero but isn't due to buggy COFF writers. | |||
1121 | // | |||
1122 | // For executables, SizeOfRawData *must* be a multiple of FileAlignment; the | |||
1123 | // actual section size is in VirtualSize. It is possible for VirtualSize to | |||
1124 | // be greater than SizeOfRawData; the contents past that point should be | |||
1125 | // considered to be zero. | |||
1126 | if (getDOSHeader()) | |||
1127 | return std::min(Sec->VirtualSize, Sec->SizeOfRawData); | |||
1128 | return Sec->SizeOfRawData; | |||
1129 | } | |||
1130 | ||||
1131 | Error COFFObjectFile::getSectionContents(const coff_section *Sec, | |||
1132 | ArrayRef<uint8_t> &Res) const { | |||
1133 | // In COFF, a virtual section won't have any in-file | |||
1134 | // content, so the file pointer to the content will be zero. | |||
1135 | if (Sec->PointerToRawData == 0) | |||
1136 | return Error::success(); | |||
1137 | // The only thing that we need to verify is that the contents is contained | |||
1138 | // within the file bounds. We don't need to make sure it doesn't cover other | |||
1139 | // data, as there's nothing that says that is not allowed. | |||
1140 | uintptr_t ConStart = | |||
1141 | reinterpret_cast<uintptr_t>(base()) + Sec->PointerToRawData; | |||
1142 | uint32_t SectionSize = getSectionSize(Sec); | |||
1143 | if (Error E = checkOffset(Data, ConStart, SectionSize)) | |||
1144 | return E; | |||
1145 | Res = makeArrayRef(reinterpret_cast<const uint8_t *>(ConStart), SectionSize); | |||
1146 | return Error::success(); | |||
1147 | } | |||
1148 | ||||
1149 | const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const { | |||
1150 | return reinterpret_cast<const coff_relocation*>(Rel.p); | |||
1151 | } | |||
1152 | ||||
1153 | void COFFObjectFile::moveRelocationNext(DataRefImpl &Rel) const { | |||
1154 | Rel.p = reinterpret_cast<uintptr_t>( | |||
1155 | reinterpret_cast<const coff_relocation*>(Rel.p) + 1); | |||
1156 | } | |||
1157 | ||||
1158 | uint64_t COFFObjectFile::getRelocationOffset(DataRefImpl Rel) const { | |||
1159 | const coff_relocation *R = toRel(Rel); | |||
1160 | return R->VirtualAddress; | |||
1161 | } | |||
1162 | ||||
1163 | symbol_iterator COFFObjectFile::getRelocationSymbol(DataRefImpl Rel) const { | |||
1164 | const coff_relocation *R = toRel(Rel); | |||
1165 | DataRefImpl Ref; | |||
1166 | if (R->SymbolTableIndex >= getNumberOfSymbols()) | |||
1167 | return symbol_end(); | |||
1168 | if (SymbolTable16) | |||
1169 | Ref.p = reinterpret_cast<uintptr_t>(SymbolTable16 + R->SymbolTableIndex); | |||
1170 | else if (SymbolTable32) | |||
1171 | Ref.p = reinterpret_cast<uintptr_t>(SymbolTable32 + R->SymbolTableIndex); | |||
1172 | else | |||
1173 | llvm_unreachable("no symbol table pointer!")__builtin_unreachable(); | |||
1174 | return symbol_iterator(SymbolRef(Ref, this)); | |||
1175 | } | |||
1176 | ||||
1177 | uint64_t COFFObjectFile::getRelocationType(DataRefImpl Rel) const { | |||
1178 | const coff_relocation* R = toRel(Rel); | |||
1179 | return R->Type; | |||
1180 | } | |||
1181 | ||||
1182 | const coff_section * | |||
1183 | COFFObjectFile::getCOFFSection(const SectionRef &Section) const { | |||
1184 | return toSec(Section.getRawDataRefImpl()); | |||
1185 | } | |||
1186 | ||||
1187 | COFFSymbolRef COFFObjectFile::getCOFFSymbol(const DataRefImpl &Ref) const { | |||
1188 | if (SymbolTable16) | |||
1189 | return toSymb<coff_symbol16>(Ref); | |||
1190 | if (SymbolTable32) | |||
1191 | return toSymb<coff_symbol32>(Ref); | |||
1192 | llvm_unreachable("no symbol table pointer!")__builtin_unreachable(); | |||
1193 | } | |||
1194 | ||||
1195 | COFFSymbolRef COFFObjectFile::getCOFFSymbol(const SymbolRef &Symbol) const { | |||
1196 | return getCOFFSymbol(Symbol.getRawDataRefImpl()); | |||
1197 | } | |||
1198 | ||||
1199 | const coff_relocation * | |||
1200 | COFFObjectFile::getCOFFRelocation(const RelocationRef &Reloc) const { | |||
1201 | return toRel(Reloc.getRawDataRefImpl()); | |||
1202 | } | |||
1203 | ||||
1204 | ArrayRef<coff_relocation> | |||
1205 | COFFObjectFile::getRelocations(const coff_section *Sec) const { | |||
1206 | return {getFirstReloc(Sec, Data, base()), | |||
1207 | getNumberOfRelocations(Sec, Data, base())}; | |||
1208 | } | |||
1209 | ||||
1210 | #define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(reloc_type) \ | |||
1211 | case COFF::reloc_type: \ | |||
1212 | return #reloc_type; | |||
1213 | ||||
1214 | StringRef COFFObjectFile::getRelocationTypeName(uint16_t Type) const { | |||
1215 | switch (getMachine()) { | |||
1216 | case COFF::IMAGE_FILE_MACHINE_AMD64: | |||
1217 | switch (Type) { | |||
1218 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE); | |||
1219 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64); | |||
1220 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32); | |||
1221 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB); | |||
1222 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32); | |||
1223 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1); | |||
1224 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2); | |||
1225 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3); | |||
1226 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4); | |||
1227 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5); | |||
1228 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION); | |||
1229 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL); | |||
1230 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7); | |||
1231 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN); | |||
1232 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32); | |||
1233 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR); | |||
1234 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32); | |||
1235 | default: | |||
1236 | return "Unknown"; | |||
1237 | } | |||
1238 | break; | |||
1239 | case COFF::IMAGE_FILE_MACHINE_ARMNT: | |||
1240 | switch (Type) { | |||
1241 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ABSOLUTE); | |||
1242 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32); | |||
1243 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32NB); | |||
1244 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24); | |||
1245 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH11); | |||
1246 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_TOKEN); | |||
1247 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX24); | |||
1248 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX11); | |||
1249 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_REL32); | |||
1250 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECTION); | |||
1251 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECREL); | |||
1252 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32A); | |||
1253 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32T); | |||
1254 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH20T); | |||
1255 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24T); | |||
1256 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX23T); | |||
1257 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_PAIR); | |||
1258 | default: | |||
1259 | return "Unknown"; | |||
1260 | } | |||
1261 | break; | |||
1262 | case COFF::IMAGE_FILE_MACHINE_ARM64: | |||
1263 | switch (Type) { | |||
1264 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ABSOLUTE); | |||
1265 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR32); | |||
1266 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR32NB); | |||
1267 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH26); | |||
1268 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEBASE_REL21); | |||
1269 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_REL21); | |||
1270 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEOFFSET_12A); | |||
1271 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEOFFSET_12L); | |||
1272 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL); | |||
1273 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_LOW12A); | |||
1274 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_HIGH12A); | |||
1275 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_LOW12L); | |||
1276 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_TOKEN); | |||
1277 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECTION); | |||
1278 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR64); | |||
1279 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH19); | |||
1280 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH14); | |||
1281 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_REL32); | |||
1282 | default: | |||
1283 | return "Unknown"; | |||
1284 | } | |||
1285 | break; | |||
1286 | case COFF::IMAGE_FILE_MACHINE_I386: | |||
1287 | switch (Type) { | |||
1288 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE); | |||
1289 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16); | |||
1290 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16); | |||
1291 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32); | |||
1292 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB); | |||
1293 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12); | |||
1294 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION); | |||
1295 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL); | |||
1296 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN); | |||
1297 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7); | |||
1298 | LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32); | |||
1299 | default: | |||
1300 | return "Unknown"; | |||
1301 | } | |||
1302 | break; | |||
1303 | default: | |||
1304 | return "Unknown"; | |||
1305 | } | |||
1306 | } | |||
1307 | ||||
1308 | #undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME | |||
1309 | ||||
1310 | void COFFObjectFile::getRelocationTypeName( | |||
1311 | DataRefImpl Rel, SmallVectorImpl<char> &Result) const { | |||
1312 | const coff_relocation *Reloc = toRel(Rel); | |||
1313 | StringRef Res = getRelocationTypeName(Reloc->Type); | |||
1314 | Result.append(Res.begin(), Res.end()); | |||
1315 | } | |||
1316 | ||||
1317 | bool COFFObjectFile::isRelocatableObject() const { | |||
1318 | return !DataDirectory; | |||
1319 | } | |||
1320 | ||||
1321 | StringRef COFFObjectFile::mapDebugSectionName(StringRef Name) const { | |||
1322 | return StringSwitch<StringRef>(Name) | |||
1323 | .Case("eh_fram", "eh_frame") | |||
1324 | .Default(Name); | |||
1325 | } | |||
1326 | ||||
1327 | bool ImportDirectoryEntryRef:: | |||
1328 | operator==(const ImportDirectoryEntryRef &Other) const { | |||
1329 | return ImportTable == Other.ImportTable && Index == Other.Index; | |||
1330 | } | |||
1331 | ||||
1332 | void ImportDirectoryEntryRef::moveNext() { | |||
1333 | ++Index; | |||
1334 | if (ImportTable[Index].isNull()) { | |||
1335 | Index = -1; | |||
1336 | ImportTable = nullptr; | |||
1337 | } | |||
1338 | } | |||
1339 | ||||
1340 | Error ImportDirectoryEntryRef::getImportTableEntry( | |||
1341 | const coff_import_directory_table_entry *&Result) const { | |||
1342 | return getObject(Result, OwningObject->Data, ImportTable + Index); | |||
1343 | } | |||
1344 | ||||
1345 | static imported_symbol_iterator | |||
1346 | makeImportedSymbolIterator(const COFFObjectFile *Object, | |||
1347 | uintptr_t Ptr, int Index) { | |||
1348 | if (Object->getBytesInAddress() == 4) { | |||
1349 | auto *P = reinterpret_cast<const import_lookup_table_entry32 *>(Ptr); | |||
1350 | return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object)); | |||
1351 | } | |||
1352 | auto *P = reinterpret_cast<const import_lookup_table_entry64 *>(Ptr); | |||
1353 | return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object)); | |||
1354 | } | |||
1355 | ||||
1356 | static imported_symbol_iterator | |||
1357 | importedSymbolBegin(uint32_t RVA, const COFFObjectFile *Object) { | |||
1358 | uintptr_t IntPtr = 0; | |||
1359 | // FIXME: Handle errors. | |||
1360 | cantFail(Object->getRvaPtr(RVA, IntPtr)); | |||
1361 | return makeImportedSymbolIterator(Object, IntPtr, 0); | |||
1362 | } | |||
1363 | ||||
1364 | static imported_symbol_iterator | |||
1365 | importedSymbolEnd(uint32_t RVA, const COFFObjectFile *Object) { | |||
1366 | uintptr_t IntPtr = 0; | |||
1367 | // FIXME: Handle errors. | |||
1368 | cantFail(Object->getRvaPtr(RVA, IntPtr)); | |||
1369 | // Forward the pointer to the last entry which is null. | |||
1370 | int Index = 0; | |||
1371 | if (Object->getBytesInAddress() == 4) { | |||
1372 | auto *Entry = reinterpret_cast<ulittle32_t *>(IntPtr); | |||
1373 | while (*Entry++) | |||
1374 | ++Index; | |||
1375 | } else { | |||
1376 | auto *Entry = reinterpret_cast<ulittle64_t *>(IntPtr); | |||
1377 | while (*Entry++) | |||
1378 | ++Index; | |||
1379 | } | |||
1380 | return makeImportedSymbolIterator(Object, IntPtr, Index); | |||
1381 | } | |||
1382 | ||||
1383 | imported_symbol_iterator | |||
1384 | ImportDirectoryEntryRef::imported_symbol_begin() const { | |||
1385 | return importedSymbolBegin(ImportTable[Index].ImportAddressTableRVA, | |||
1386 | OwningObject); | |||
1387 | } | |||
1388 | ||||
1389 | imported_symbol_iterator | |||
1390 | ImportDirectoryEntryRef::imported_symbol_end() const { | |||
1391 | return importedSymbolEnd(ImportTable[Index].ImportAddressTableRVA, | |||
1392 | OwningObject); | |||
1393 | } | |||
1394 | ||||
1395 | iterator_range<imported_symbol_iterator> | |||
1396 | ImportDirectoryEntryRef::imported_symbols() const { | |||
1397 | return make_range(imported_symbol_begin(), imported_symbol_end()); | |||
1398 | } | |||
1399 | ||||
1400 | imported_symbol_iterator ImportDirectoryEntryRef::lookup_table_begin() const { | |||
1401 | return importedSymbolBegin(ImportTable[Index].ImportLookupTableRVA, | |||
1402 | OwningObject); | |||
1403 | } | |||
1404 | ||||
1405 | imported_symbol_iterator ImportDirectoryEntryRef::lookup_table_end() const { | |||
1406 | return importedSymbolEnd(ImportTable[Index].ImportLookupTableRVA, | |||
1407 | OwningObject); | |||
1408 | } | |||
1409 | ||||
1410 | iterator_range<imported_symbol_iterator> | |||
1411 | ImportDirectoryEntryRef::lookup_table_symbols() const { | |||
1412 | return make_range(lookup_table_begin(), lookup_table_end()); | |||
1413 | } | |||
1414 | ||||
1415 | Error ImportDirectoryEntryRef::getName(StringRef &Result) const { | |||
1416 | uintptr_t IntPtr = 0; | |||
1417 | if (Error E = OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr)) | |||
1418 | return E; | |||
1419 | Result = StringRef(reinterpret_cast<const char *>(IntPtr)); | |||
1420 | return Error::success(); | |||
1421 | } | |||
1422 | ||||
1423 | Error | |||
1424 | ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t &Result) const { | |||
1425 | Result = ImportTable[Index].ImportLookupTableRVA; | |||
1426 | return Error::success(); | |||
1427 | } | |||
1428 | ||||
1429 | Error ImportDirectoryEntryRef::getImportAddressTableRVA( | |||
1430 | uint32_t &Result) const { | |||
1431 | Result = ImportTable[Index].ImportAddressTableRVA; | |||
1432 | return Error::success(); | |||
1433 | } | |||
1434 | ||||
1435 | bool DelayImportDirectoryEntryRef:: | |||
1436 | operator==(const DelayImportDirectoryEntryRef &Other) const { | |||
1437 | return Table == Other.Table && Index == Other.Index; | |||
1438 | } | |||
1439 | ||||
1440 | void DelayImportDirectoryEntryRef::moveNext() { | |||
1441 | ++Index; | |||
1442 | } | |||
1443 | ||||
1444 | imported_symbol_iterator | |||
1445 | DelayImportDirectoryEntryRef::imported_symbol_begin() const { | |||
1446 | return importedSymbolBegin(Table[Index].DelayImportNameTable, | |||
1447 | OwningObject); | |||
1448 | } | |||
1449 | ||||
1450 | imported_symbol_iterator | |||
1451 | DelayImportDirectoryEntryRef::imported_symbol_end() const { | |||
1452 | return importedSymbolEnd(Table[Index].DelayImportNameTable, | |||
1453 | OwningObject); | |||
1454 | } | |||
1455 | ||||
1456 | iterator_range<imported_symbol_iterator> | |||
1457 | DelayImportDirectoryEntryRef::imported_symbols() const { | |||
1458 | return make_range(imported_symbol_begin(), imported_symbol_end()); | |||
1459 | } | |||
1460 | ||||
1461 | Error DelayImportDirectoryEntryRef::getName(StringRef &Result) const { | |||
1462 | uintptr_t IntPtr = 0; | |||
1463 | if (Error E = OwningObject->getRvaPtr(Table[Index].Name, IntPtr)) | |||
1464 | return E; | |||
1465 | Result = StringRef(reinterpret_cast<const char *>(IntPtr)); | |||
1466 | return Error::success(); | |||
1467 | } | |||
1468 | ||||
1469 | Error DelayImportDirectoryEntryRef::getDelayImportTable( | |||
1470 | const delay_import_directory_table_entry *&Result) const { | |||
1471 | Result = &Table[Index]; | |||
1472 | return Error::success(); | |||
1473 | } | |||
1474 | ||||
1475 | Error DelayImportDirectoryEntryRef::getImportAddress(int AddrIndex, | |||
1476 | uint64_t &Result) const { | |||
1477 | uint32_t RVA = Table[Index].DelayImportAddressTable + | |||
1478 | AddrIndex * (OwningObject->is64() ? 8 : 4); | |||
1479 | uintptr_t IntPtr = 0; | |||
1480 | if (Error E = OwningObject->getRvaPtr(RVA, IntPtr)) | |||
1481 | return E; | |||
1482 | if (OwningObject->is64()) | |||
1483 | Result = *reinterpret_cast<const ulittle64_t *>(IntPtr); | |||
1484 | else | |||
1485 | Result = *reinterpret_cast<const ulittle32_t *>(IntPtr); | |||
1486 | return Error::success(); | |||
1487 | } | |||
1488 | ||||
1489 | bool ExportDirectoryEntryRef:: | |||
1490 | operator==(const ExportDirectoryEntryRef &Other) const { | |||
1491 | return ExportTable == Other.ExportTable && Index == Other.Index; | |||
1492 | } | |||
1493 | ||||
1494 | void ExportDirectoryEntryRef::moveNext() { | |||
1495 | ++Index; | |||
1496 | } | |||
1497 | ||||
1498 | // Returns the name of the current export symbol. If the symbol is exported only | |||
1499 | // by ordinal, the empty string is set as a result. | |||
1500 | Error ExportDirectoryEntryRef::getDllName(StringRef &Result) const { | |||
1501 | uintptr_t IntPtr = 0; | |||
1502 | if (Error E = OwningObject->getRvaPtr(ExportTable->NameRVA, IntPtr)) | |||
1503 | return E; | |||
1504 | Result = StringRef(reinterpret_cast<const char *>(IntPtr)); | |||
1505 | return Error::success(); | |||
1506 | } | |||
1507 | ||||
1508 | // Returns the starting ordinal number. | |||
1509 | Error ExportDirectoryEntryRef::getOrdinalBase(uint32_t &Result) const { | |||
1510 | Result = ExportTable->OrdinalBase; | |||
1511 | return Error::success(); | |||
1512 | } | |||
1513 | ||||
1514 | // Returns the export ordinal of the current export symbol. | |||
1515 | Error ExportDirectoryEntryRef::getOrdinal(uint32_t &Result) const { | |||
1516 | Result = ExportTable->OrdinalBase + Index; | |||
1517 | return Error::success(); | |||
1518 | } | |||
1519 | ||||
1520 | // Returns the address of the current export symbol. | |||
1521 | Error ExportDirectoryEntryRef::getExportRVA(uint32_t &Result) const { | |||
1522 | uintptr_t IntPtr = 0; | |||
1523 | if (Error EC = | |||
1524 | OwningObject->getRvaPtr(ExportTable->ExportAddressTableRVA, IntPtr)) | |||
1525 | return EC; | |||
1526 | const export_address_table_entry *entry = | |||
1527 | reinterpret_cast<const export_address_table_entry *>(IntPtr); | |||
1528 | Result = entry[Index].ExportRVA; | |||
1529 | return Error::success(); | |||
1530 | } | |||
1531 | ||||
1532 | // Returns the name of the current export symbol. If the symbol is exported only | |||
1533 | // by ordinal, the empty string is set as a result. | |||
1534 | Error | |||
1535 | ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const { | |||
1536 | uintptr_t IntPtr = 0; | |||
1537 | if (Error EC = | |||
1538 | OwningObject->getRvaPtr(ExportTable->OrdinalTableRVA, IntPtr)) | |||
1539 | return EC; | |||
1540 | const ulittle16_t *Start = reinterpret_cast<const ulittle16_t *>(IntPtr); | |||
1541 | ||||
1542 | uint32_t NumEntries = ExportTable->NumberOfNamePointers; | |||
1543 | int Offset = 0; | |||
1544 | for (const ulittle16_t *I = Start, *E = Start + NumEntries; | |||
1545 | I < E; ++I, ++Offset) { | |||
1546 | if (*I != Index) | |||
1547 | continue; | |||
1548 | if (Error EC = | |||
1549 | OwningObject->getRvaPtr(ExportTable->NamePointerRVA, IntPtr)) | |||
1550 | return EC; | |||
1551 | const ulittle32_t *NamePtr = reinterpret_cast<const ulittle32_t *>(IntPtr); | |||
1552 | if (Error EC = OwningObject->getRvaPtr(NamePtr[Offset], IntPtr)) | |||
1553 | return EC; | |||
1554 | Result = StringRef(reinterpret_cast<const char *>(IntPtr)); | |||
1555 | return Error::success(); | |||
1556 | } | |||
1557 | Result = ""; | |||
1558 | return Error::success(); | |||
1559 | } | |||
1560 | ||||
1561 | Error ExportDirectoryEntryRef::isForwarder(bool &Result) const { | |||
1562 | const data_directory *DataEntry = | |||
1563 | OwningObject->getDataDirectory(COFF::EXPORT_TABLE); | |||
1564 | if (!DataEntry) | |||
1565 | return errorCodeToError(object_error::parse_failed); | |||
1566 | uint32_t RVA; | |||
1567 | if (auto EC = getExportRVA(RVA)) | |||
1568 | return EC; | |||
1569 | uint32_t Begin = DataEntry->RelativeVirtualAddress; | |||
1570 | uint32_t End = DataEntry->RelativeVirtualAddress + DataEntry->Size; | |||
1571 | Result = (Begin <= RVA && RVA < End); | |||
1572 | return Error::success(); | |||
1573 | } | |||
1574 | ||||
1575 | Error ExportDirectoryEntryRef::getForwardTo(StringRef &Result) const { | |||
1576 | uint32_t RVA; | |||
1577 | if (auto EC = getExportRVA(RVA)) | |||
1578 | return EC; | |||
1579 | uintptr_t IntPtr = 0; | |||
1580 | if (auto EC = OwningObject->getRvaPtr(RVA, IntPtr)) | |||
1581 | return EC; | |||
1582 | Result = StringRef(reinterpret_cast<const char *>(IntPtr)); | |||
1583 | return Error::success(); | |||
1584 | } | |||
1585 | ||||
1586 | bool ImportedSymbolRef:: | |||
1587 | operator==(const ImportedSymbolRef &Other) const { | |||
1588 | return Entry32 == Other.Entry32 && Entry64 == Other.Entry64 | |||
1589 | && Index == Other.Index; | |||
1590 | } | |||
1591 | ||||
1592 | void ImportedSymbolRef::moveNext() { | |||
1593 | ++Index; | |||
1594 | } | |||
1595 | ||||
1596 | Error ImportedSymbolRef::getSymbolName(StringRef &Result) const { | |||
1597 | uint32_t RVA; | |||
1598 | if (Entry32) { | |||
1599 | // If a symbol is imported only by ordinal, it has no name. | |||
1600 | if (Entry32[Index].isOrdinal()) | |||
1601 | return Error::success(); | |||
1602 | RVA = Entry32[Index].getHintNameRVA(); | |||
1603 | } else { | |||
1604 | if (Entry64[Index].isOrdinal()) | |||
1605 | return Error::success(); | |||
1606 | RVA = Entry64[Index].getHintNameRVA(); | |||
1607 | } | |||
1608 | uintptr_t IntPtr = 0; | |||
1609 | if (Error EC = OwningObject->getRvaPtr(RVA, IntPtr)) | |||
1610 | return EC; | |||
1611 | // +2 because the first two bytes is hint. | |||
1612 | Result = StringRef(reinterpret_cast<const char *>(IntPtr + 2)); | |||
1613 | return Error::success(); | |||
1614 | } | |||
1615 | ||||
1616 | Error ImportedSymbolRef::isOrdinal(bool &Result) const { | |||
1617 | if (Entry32) | |||
1618 | Result = Entry32[Index].isOrdinal(); | |||
1619 | else | |||
1620 | Result = Entry64[Index].isOrdinal(); | |||
1621 | return Error::success(); | |||
1622 | } | |||
1623 | ||||
1624 | Error ImportedSymbolRef::getHintNameRVA(uint32_t &Result) const { | |||
1625 | if (Entry32) | |||
1626 | Result = Entry32[Index].getHintNameRVA(); | |||
1627 | else | |||
1628 | Result = Entry64[Index].getHintNameRVA(); | |||
1629 | return Error::success(); | |||
1630 | } | |||
1631 | ||||
1632 | Error ImportedSymbolRef::getOrdinal(uint16_t &Result) const { | |||
1633 | uint32_t RVA; | |||
1634 | if (Entry32) { | |||
1635 | if (Entry32[Index].isOrdinal()) { | |||
1636 | Result = Entry32[Index].getOrdinal(); | |||
1637 | return Error::success(); | |||
1638 | } | |||
1639 | RVA = Entry32[Index].getHintNameRVA(); | |||
1640 | } else { | |||
1641 | if (Entry64[Index].isOrdinal()) { | |||
1642 | Result = Entry64[Index].getOrdinal(); | |||
1643 | return Error::success(); | |||
1644 | } | |||
1645 | RVA = Entry64[Index].getHintNameRVA(); | |||
1646 | } | |||
1647 | uintptr_t IntPtr = 0; | |||
1648 | if (Error EC = OwningObject->getRvaPtr(RVA, IntPtr)) | |||
1649 | return EC; | |||
1650 | Result = *reinterpret_cast<const ulittle16_t *>(IntPtr); | |||
1651 | return Error::success(); | |||
1652 | } | |||
1653 | ||||
1654 | Expected<std::unique_ptr<COFFObjectFile>> | |||
1655 | ObjectFile::createCOFFObjectFile(MemoryBufferRef Object) { | |||
1656 | return COFFObjectFile::create(Object); | |||
1657 | } | |||
1658 | ||||
1659 | bool BaseRelocRef::operator==(const BaseRelocRef &Other) const { | |||
1660 | return Header == Other.Header && Index == Other.Index; | |||
1661 | } | |||
1662 | ||||
1663 | void BaseRelocRef::moveNext() { | |||
1664 | // Header->BlockSize is the size of the current block, including the | |||
1665 | // size of the header itself. | |||
1666 | uint32_t Size = sizeof(*Header) + | |||
1667 | sizeof(coff_base_reloc_block_entry) * (Index + 1); | |||
1668 | if (Size == Header->BlockSize) { | |||
1669 | // .reloc contains a list of base relocation blocks. Each block | |||
1670 | // consists of the header followed by entries. The header contains | |||
1671 | // how many entories will follow. When we reach the end of the | |||
1672 | // current block, proceed to the next block. | |||
1673 | Header = reinterpret_cast<const coff_base_reloc_block_header *>( | |||
1674 | reinterpret_cast<const uint8_t *>(Header) + Size); | |||
1675 | Index = 0; | |||
1676 | } else { | |||
1677 | ++Index; | |||
1678 | } | |||
1679 | } | |||
1680 | ||||
1681 | Error BaseRelocRef::getType(uint8_t &Type) const { | |||
1682 | auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1); | |||
1683 | Type = Entry[Index].getType(); | |||
1684 | return Error::success(); | |||
1685 | } | |||
1686 | ||||
1687 | Error BaseRelocRef::getRVA(uint32_t &Result) const { | |||
1688 | auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1); | |||
1689 | Result = Header->PageRVA + Entry[Index].getOffset(); | |||
1690 | return Error::success(); | |||
1691 | } | |||
1692 | ||||
1693 | #define RETURN_IF_ERROR(Expr)do { Error E = (Expr); if (E) return std::move(E); } while (0 ) \ | |||
1694 | do { \ | |||
1695 | Error E = (Expr); \ | |||
1696 | if (E) \ | |||
1697 | return std::move(E); \ | |||
1698 | } while (0) | |||
1699 | ||||
1700 | Expected<ArrayRef<UTF16>> | |||
1701 | ResourceSectionRef::getDirStringAtOffset(uint32_t Offset) { | |||
1702 | BinaryStreamReader Reader = BinaryStreamReader(BBS); | |||
1703 | Reader.setOffset(Offset); | |||
1704 | uint16_t Length; | |||
1705 | RETURN_IF_ERROR(Reader.readInteger(Length))do { Error E = (Reader.readInteger(Length)); if (E) return std ::move(E); } while (0); | |||
1706 | ArrayRef<UTF16> RawDirString; | |||
1707 | RETURN_IF_ERROR(Reader.readArray(RawDirString, Length))do { Error E = (Reader.readArray(RawDirString, Length)); if ( E) return std::move(E); } while (0); | |||
1708 | return RawDirString; | |||
1709 | } | |||
1710 | ||||
1711 | Expected<ArrayRef<UTF16>> | |||
1712 | ResourceSectionRef::getEntryNameString(const coff_resource_dir_entry &Entry) { | |||
1713 | return getDirStringAtOffset(Entry.Identifier.getNameOffset()); | |||
1714 | } | |||
1715 | ||||
1716 | Expected<const coff_resource_dir_table &> | |||
1717 | ResourceSectionRef::getTableAtOffset(uint32_t Offset) { | |||
1718 | const coff_resource_dir_table *Table = nullptr; | |||
1719 | ||||
1720 | BinaryStreamReader Reader(BBS); | |||
1721 | Reader.setOffset(Offset); | |||
1722 | RETURN_IF_ERROR(Reader.readObject(Table))do { Error E = (Reader.readObject(Table)); if (E) return std:: move(E); } while (0); | |||
1723 | assert(Table != nullptr)((void)0); | |||
1724 | return *Table; | |||
1725 | } | |||
1726 | ||||
1727 | Expected<const coff_resource_dir_entry &> | |||
1728 | ResourceSectionRef::getTableEntryAtOffset(uint32_t Offset) { | |||
1729 | const coff_resource_dir_entry *Entry = nullptr; | |||
1730 | ||||
1731 | BinaryStreamReader Reader(BBS); | |||
1732 | Reader.setOffset(Offset); | |||
1733 | RETURN_IF_ERROR(Reader.readObject(Entry))do { Error E = (Reader.readObject(Entry)); if (E) return std:: move(E); } while (0); | |||
1734 | assert(Entry != nullptr)((void)0); | |||
1735 | return *Entry; | |||
1736 | } | |||
1737 | ||||
1738 | Expected<const coff_resource_data_entry &> | |||
1739 | ResourceSectionRef::getDataEntryAtOffset(uint32_t Offset) { | |||
1740 | const coff_resource_data_entry *Entry = nullptr; | |||
1741 | ||||
1742 | BinaryStreamReader Reader(BBS); | |||
1743 | Reader.setOffset(Offset); | |||
1744 | RETURN_IF_ERROR(Reader.readObject(Entry))do { Error E = (Reader.readObject(Entry)); if (E) return std:: move(E); } while (0); | |||
1745 | assert(Entry != nullptr)((void)0); | |||
1746 | return *Entry; | |||
1747 | } | |||
1748 | ||||
1749 | Expected<const coff_resource_dir_table &> | |||
1750 | ResourceSectionRef::getEntrySubDir(const coff_resource_dir_entry &Entry) { | |||
1751 | assert(Entry.Offset.isSubDir())((void)0); | |||
1752 | return getTableAtOffset(Entry.Offset.value()); | |||
1753 | } | |||
1754 | ||||
1755 | Expected<const coff_resource_data_entry &> | |||
1756 | ResourceSectionRef::getEntryData(const coff_resource_dir_entry &Entry) { | |||
1757 | assert(!Entry.Offset.isSubDir())((void)0); | |||
1758 | return getDataEntryAtOffset(Entry.Offset.value()); | |||
1759 | } | |||
1760 | ||||
1761 | Expected<const coff_resource_dir_table &> ResourceSectionRef::getBaseTable() { | |||
1762 | return getTableAtOffset(0); | |||
1763 | } | |||
1764 | ||||
1765 | Expected<const coff_resource_dir_entry &> | |||
1766 | ResourceSectionRef::getTableEntry(const coff_resource_dir_table &Table, | |||
1767 | uint32_t Index) { | |||
1768 | if (Index >= (uint32_t)(Table.NumberOfNameEntries + Table.NumberOfIDEntries)) | |||
1769 | return createStringError(object_error::parse_failed, "index out of range"); | |||
1770 | const uint8_t *TablePtr = reinterpret_cast<const uint8_t *>(&Table); | |||
1771 | ptrdiff_t TableOffset = TablePtr - BBS.data().data(); | |||
1772 | return getTableEntryAtOffset(TableOffset + sizeof(Table) + | |||
1773 | Index * sizeof(coff_resource_dir_entry)); | |||
1774 | } | |||
1775 | ||||
1776 | Error ResourceSectionRef::load(const COFFObjectFile *O) { | |||
1777 | for (const SectionRef &S : O->sections()) { | |||
1778 | Expected<StringRef> Name = S.getName(); | |||
1779 | if (!Name) | |||
1780 | return Name.takeError(); | |||
1781 | ||||
1782 | if (*Name == ".rsrc" || *Name == ".rsrc$01") | |||
1783 | return load(O, S); | |||
1784 | } | |||
1785 | return createStringError(object_error::parse_failed, | |||
1786 | "no resource section found"); | |||
1787 | } | |||
1788 | ||||
1789 | Error ResourceSectionRef::load(const COFFObjectFile *O, const SectionRef &S) { | |||
1790 | Obj = O; | |||
1791 | Section = S; | |||
1792 | Expected<StringRef> Contents = Section.getContents(); | |||
1793 | if (!Contents) | |||
1794 | return Contents.takeError(); | |||
1795 | BBS = BinaryByteStream(*Contents, support::little); | |||
1796 | const coff_section *COFFSect = Obj->getCOFFSection(Section); | |||
1797 | ArrayRef<coff_relocation> OrigRelocs = Obj->getRelocations(COFFSect); | |||
1798 | Relocs.reserve(OrigRelocs.size()); | |||
1799 | for (const coff_relocation &R : OrigRelocs) | |||
1800 | Relocs.push_back(&R); | |||
1801 | llvm::sort(Relocs, [](const coff_relocation *A, const coff_relocation *B) { | |||
1802 | return A->VirtualAddress < B->VirtualAddress; | |||
1803 | }); | |||
1804 | return Error::success(); | |||
1805 | } | |||
1806 | ||||
1807 | Expected<StringRef> | |||
1808 | ResourceSectionRef::getContents(const coff_resource_data_entry &Entry) { | |||
1809 | if (!Obj) | |||
1810 | return createStringError(object_error::parse_failed, "no object provided"); | |||
1811 | ||||
1812 | // Find a potential relocation at the DataRVA field (first member of | |||
1813 | // the coff_resource_data_entry struct). | |||
1814 | const uint8_t *EntryPtr = reinterpret_cast<const uint8_t *>(&Entry); | |||
1815 | ptrdiff_t EntryOffset = EntryPtr - BBS.data().data(); | |||
1816 | coff_relocation RelocTarget{ulittle32_t(EntryOffset), ulittle32_t(0), | |||
1817 | ulittle16_t(0)}; | |||
1818 | auto RelocsForOffset = | |||
1819 | std::equal_range(Relocs.begin(), Relocs.end(), &RelocTarget, | |||
1820 | [](const coff_relocation *A, const coff_relocation *B) { | |||
1821 | return A->VirtualAddress < B->VirtualAddress; | |||
1822 | }); | |||
1823 | ||||
1824 | if (RelocsForOffset.first != RelocsForOffset.second) { | |||
1825 | // We found a relocation with the right offset. Check that it does have | |||
1826 | // the expected type. | |||
1827 | const coff_relocation &R = **RelocsForOffset.first; | |||
1828 | uint16_t RVAReloc; | |||
1829 | switch (Obj->getMachine()) { | |||
1830 | case COFF::IMAGE_FILE_MACHINE_I386: | |||
1831 | RVAReloc = COFF::IMAGE_REL_I386_DIR32NB; | |||
1832 | break; | |||
1833 | case COFF::IMAGE_FILE_MACHINE_AMD64: | |||
1834 | RVAReloc = COFF::IMAGE_REL_AMD64_ADDR32NB; | |||
1835 | break; | |||
1836 | case COFF::IMAGE_FILE_MACHINE_ARMNT: | |||
1837 | RVAReloc = COFF::IMAGE_REL_ARM_ADDR32NB; | |||
1838 | break; | |||
1839 | case COFF::IMAGE_FILE_MACHINE_ARM64: | |||
1840 | RVAReloc = COFF::IMAGE_REL_ARM64_ADDR32NB; | |||
1841 | break; | |||
1842 | default: | |||
1843 | return createStringError(object_error::parse_failed, | |||
1844 | "unsupported architecture"); | |||
1845 | } | |||
1846 | if (R.Type != RVAReloc) | |||
1847 | return createStringError(object_error::parse_failed, | |||
1848 | "unexpected relocation type"); | |||
1849 | // Get the relocation's symbol | |||
1850 | Expected<COFFSymbolRef> Sym = Obj->getSymbol(R.SymbolTableIndex); | |||
1851 | if (!Sym) | |||
1852 | return Sym.takeError(); | |||
1853 | // And the symbol's section | |||
1854 | Expected<const coff_section *> Section = | |||
1855 | Obj->getSection(Sym->getSectionNumber()); | |||
1856 | if (!Section) | |||
1857 | return Section.takeError(); | |||
1858 | // Add the initial value of DataRVA to the symbol's offset to find the | |||
1859 | // data it points at. | |||
1860 | uint64_t Offset = Entry.DataRVA + Sym->getValue(); | |||
1861 | ArrayRef<uint8_t> Contents; | |||
1862 | if (Error E = Obj->getSectionContents(*Section, Contents)) | |||
1863 | return std::move(E); | |||
1864 | if (Offset + Entry.DataSize > Contents.size()) | |||
1865 | return createStringError(object_error::parse_failed, | |||
1866 | "data outside of section"); | |||
1867 | // Return a reference to the data inside the section. | |||
1868 | return StringRef(reinterpret_cast<const char *>(Contents.data()) + Offset, | |||
1869 | Entry.DataSize); | |||
1870 | } else { | |||
1871 | // Relocatable objects need a relocation for the DataRVA field. | |||
1872 | if (Obj->isRelocatableObject()) | |||
1873 | return createStringError(object_error::parse_failed, | |||
1874 | "no relocation found for DataRVA"); | |||
1875 | ||||
1876 | // Locate the section that contains the address that DataRVA points at. | |||
1877 | uint64_t VA = Entry.DataRVA + Obj->getImageBase(); | |||
1878 | for (const SectionRef &S : Obj->sections()) { | |||
1879 | if (VA >= S.getAddress() && | |||
1880 | VA + Entry.DataSize <= S.getAddress() + S.getSize()) { | |||
1881 | uint64_t Offset = VA - S.getAddress(); | |||
1882 | Expected<StringRef> Contents = S.getContents(); | |||
1883 | if (!Contents) | |||
1884 | return Contents.takeError(); | |||
1885 | return Contents->slice(Offset, Offset + Entry.DataSize); | |||
1886 | } | |||
1887 | } | |||
1888 | return createStringError(object_error::parse_failed, | |||
1889 | "address not found in image"); | |||
1890 | } | |||
1891 | } |
1 | //===- COFF.h - COFF object file implementation -----------------*- C++ -*-===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file declares the COFFObjectFile class. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #ifndef LLVM_OBJECT_COFF_H | |||
14 | #define LLVM_OBJECT_COFF_H | |||
15 | ||||
16 | #include "llvm/ADT/iterator_range.h" | |||
17 | #include "llvm/BinaryFormat/COFF.h" | |||
18 | #include "llvm/MC/SubtargetFeature.h" | |||
19 | #include "llvm/Object/Binary.h" | |||
20 | #include "llvm/Object/CVDebugRecord.h" | |||
21 | #include "llvm/Object/Error.h" | |||
22 | #include "llvm/Object/ObjectFile.h" | |||
23 | #include "llvm/Support/BinaryByteStream.h" | |||
24 | #include "llvm/Support/ConvertUTF.h" | |||
25 | #include "llvm/Support/Endian.h" | |||
26 | #include "llvm/Support/ErrorHandling.h" | |||
27 | #include <cassert> | |||
28 | #include <cstddef> | |||
29 | #include <cstdint> | |||
30 | #include <system_error> | |||
31 | ||||
32 | namespace llvm { | |||
33 | ||||
34 | template <typename T> class ArrayRef; | |||
35 | ||||
36 | namespace object { | |||
37 | ||||
38 | class BaseRelocRef; | |||
39 | class DelayImportDirectoryEntryRef; | |||
40 | class ExportDirectoryEntryRef; | |||
41 | class ImportDirectoryEntryRef; | |||
42 | class ImportedSymbolRef; | |||
43 | class ResourceSectionRef; | |||
44 | ||||
45 | using import_directory_iterator = content_iterator<ImportDirectoryEntryRef>; | |||
46 | using delay_import_directory_iterator = | |||
47 | content_iterator<DelayImportDirectoryEntryRef>; | |||
48 | using export_directory_iterator = content_iterator<ExportDirectoryEntryRef>; | |||
49 | using imported_symbol_iterator = content_iterator<ImportedSymbolRef>; | |||
50 | using base_reloc_iterator = content_iterator<BaseRelocRef>; | |||
51 | ||||
52 | /// The DOS compatible header at the front of all PE/COFF executables. | |||
53 | struct dos_header { | |||
54 | char Magic[2]; | |||
55 | support::ulittle16_t UsedBytesInTheLastPage; | |||
56 | support::ulittle16_t FileSizeInPages; | |||
57 | support::ulittle16_t NumberOfRelocationItems; | |||
58 | support::ulittle16_t HeaderSizeInParagraphs; | |||
59 | support::ulittle16_t MinimumExtraParagraphs; | |||
60 | support::ulittle16_t MaximumExtraParagraphs; | |||
61 | support::ulittle16_t InitialRelativeSS; | |||
62 | support::ulittle16_t InitialSP; | |||
63 | support::ulittle16_t Checksum; | |||
64 | support::ulittle16_t InitialIP; | |||
65 | support::ulittle16_t InitialRelativeCS; | |||
66 | support::ulittle16_t AddressOfRelocationTable; | |||
67 | support::ulittle16_t OverlayNumber; | |||
68 | support::ulittle16_t Reserved[4]; | |||
69 | support::ulittle16_t OEMid; | |||
70 | support::ulittle16_t OEMinfo; | |||
71 | support::ulittle16_t Reserved2[10]; | |||
72 | support::ulittle32_t AddressOfNewExeHeader; | |||
73 | }; | |||
74 | ||||
75 | struct coff_file_header { | |||
76 | support::ulittle16_t Machine; | |||
77 | support::ulittle16_t NumberOfSections; | |||
78 | support::ulittle32_t TimeDateStamp; | |||
79 | support::ulittle32_t PointerToSymbolTable; | |||
80 | support::ulittle32_t NumberOfSymbols; | |||
81 | support::ulittle16_t SizeOfOptionalHeader; | |||
82 | support::ulittle16_t Characteristics; | |||
83 | ||||
84 | bool isImportLibrary() const { return NumberOfSections == 0xffff; } | |||
85 | }; | |||
86 | ||||
87 | struct coff_bigobj_file_header { | |||
88 | support::ulittle16_t Sig1; | |||
89 | support::ulittle16_t Sig2; | |||
90 | support::ulittle16_t Version; | |||
91 | support::ulittle16_t Machine; | |||
92 | support::ulittle32_t TimeDateStamp; | |||
93 | uint8_t UUID[16]; | |||
94 | support::ulittle32_t unused1; | |||
95 | support::ulittle32_t unused2; | |||
96 | support::ulittle32_t unused3; | |||
97 | support::ulittle32_t unused4; | |||
98 | support::ulittle32_t NumberOfSections; | |||
99 | support::ulittle32_t PointerToSymbolTable; | |||
100 | support::ulittle32_t NumberOfSymbols; | |||
101 | }; | |||
102 | ||||
103 | /// The 32-bit PE header that follows the COFF header. | |||
104 | struct pe32_header { | |||
105 | support::ulittle16_t Magic; | |||
106 | uint8_t MajorLinkerVersion; | |||
107 | uint8_t MinorLinkerVersion; | |||
108 | support::ulittle32_t SizeOfCode; | |||
109 | support::ulittle32_t SizeOfInitializedData; | |||
110 | support::ulittle32_t SizeOfUninitializedData; | |||
111 | support::ulittle32_t AddressOfEntryPoint; | |||
112 | support::ulittle32_t BaseOfCode; | |||
113 | support::ulittle32_t BaseOfData; | |||
114 | support::ulittle32_t ImageBase; | |||
115 | support::ulittle32_t SectionAlignment; | |||
116 | support::ulittle32_t FileAlignment; | |||
117 | support::ulittle16_t MajorOperatingSystemVersion; | |||
118 | support::ulittle16_t MinorOperatingSystemVersion; | |||
119 | support::ulittle16_t MajorImageVersion; | |||
120 | support::ulittle16_t MinorImageVersion; | |||
121 | support::ulittle16_t MajorSubsystemVersion; | |||
122 | support::ulittle16_t MinorSubsystemVersion; | |||
123 | support::ulittle32_t Win32VersionValue; | |||
124 | support::ulittle32_t SizeOfImage; | |||
125 | support::ulittle32_t SizeOfHeaders; | |||
126 | support::ulittle32_t CheckSum; | |||
127 | support::ulittle16_t Subsystem; | |||
128 | // FIXME: This should be DllCharacteristics. | |||
129 | support::ulittle16_t DLLCharacteristics; | |||
130 | support::ulittle32_t SizeOfStackReserve; | |||
131 | support::ulittle32_t SizeOfStackCommit; | |||
132 | support::ulittle32_t SizeOfHeapReserve; | |||
133 | support::ulittle32_t SizeOfHeapCommit; | |||
134 | support::ulittle32_t LoaderFlags; | |||
135 | // FIXME: This should be NumberOfRvaAndSizes. | |||
136 | support::ulittle32_t NumberOfRvaAndSize; | |||
137 | }; | |||
138 | ||||
139 | /// The 64-bit PE header that follows the COFF header. | |||
140 | struct pe32plus_header { | |||
141 | support::ulittle16_t Magic; | |||
142 | uint8_t MajorLinkerVersion; | |||
143 | uint8_t MinorLinkerVersion; | |||
144 | support::ulittle32_t SizeOfCode; | |||
145 | support::ulittle32_t SizeOfInitializedData; | |||
146 | support::ulittle32_t SizeOfUninitializedData; | |||
147 | support::ulittle32_t AddressOfEntryPoint; | |||
148 | support::ulittle32_t BaseOfCode; | |||
149 | support::ulittle64_t ImageBase; | |||
150 | support::ulittle32_t SectionAlignment; | |||
151 | support::ulittle32_t FileAlignment; | |||
152 | support::ulittle16_t MajorOperatingSystemVersion; | |||
153 | support::ulittle16_t MinorOperatingSystemVersion; | |||
154 | support::ulittle16_t MajorImageVersion; | |||
155 | support::ulittle16_t MinorImageVersion; | |||
156 | support::ulittle16_t MajorSubsystemVersion; | |||
157 | support::ulittle16_t MinorSubsystemVersion; | |||
158 | support::ulittle32_t Win32VersionValue; | |||
159 | support::ulittle32_t SizeOfImage; | |||
160 | support::ulittle32_t SizeOfHeaders; | |||
161 | support::ulittle32_t CheckSum; | |||
162 | support::ulittle16_t Subsystem; | |||
163 | support::ulittle16_t DLLCharacteristics; | |||
164 | support::ulittle64_t SizeOfStackReserve; | |||
165 | support::ulittle64_t SizeOfStackCommit; | |||
166 | support::ulittle64_t SizeOfHeapReserve; | |||
167 | support::ulittle64_t SizeOfHeapCommit; | |||
168 | support::ulittle32_t LoaderFlags; | |||
169 | support::ulittle32_t NumberOfRvaAndSize; | |||
170 | }; | |||
171 | ||||
172 | struct data_directory { | |||
173 | support::ulittle32_t RelativeVirtualAddress; | |||
174 | support::ulittle32_t Size; | |||
175 | }; | |||
176 | ||||
177 | struct debug_directory { | |||
178 | support::ulittle32_t Characteristics; | |||
179 | support::ulittle32_t TimeDateStamp; | |||
180 | support::ulittle16_t MajorVersion; | |||
181 | support::ulittle16_t MinorVersion; | |||
182 | support::ulittle32_t Type; | |||
183 | support::ulittle32_t SizeOfData; | |||
184 | support::ulittle32_t AddressOfRawData; | |||
185 | support::ulittle32_t PointerToRawData; | |||
186 | }; | |||
187 | ||||
188 | template <typename IntTy> | |||
189 | struct import_lookup_table_entry { | |||
190 | IntTy Data; | |||
191 | ||||
192 | bool isOrdinal() const { return Data < 0; } | |||
193 | ||||
194 | uint16_t getOrdinal() const { | |||
195 | assert(isOrdinal() && "ILT entry is not an ordinal!")((void)0); | |||
196 | return Data & 0xFFFF; | |||
197 | } | |||
198 | ||||
199 | uint32_t getHintNameRVA() const { | |||
200 | assert(!isOrdinal() && "ILT entry is not a Hint/Name RVA!")((void)0); | |||
201 | return Data & 0xFFFFFFFF; | |||
202 | } | |||
203 | }; | |||
204 | ||||
205 | using import_lookup_table_entry32 = | |||
206 | import_lookup_table_entry<support::little32_t>; | |||
207 | using import_lookup_table_entry64 = | |||
208 | import_lookup_table_entry<support::little64_t>; | |||
209 | ||||
210 | struct delay_import_directory_table_entry { | |||
211 | // dumpbin reports this field as "Characteristics" instead of "Attributes". | |||
212 | support::ulittle32_t Attributes; | |||
213 | support::ulittle32_t Name; | |||
214 | support::ulittle32_t ModuleHandle; | |||
215 | support::ulittle32_t DelayImportAddressTable; | |||
216 | support::ulittle32_t DelayImportNameTable; | |||
217 | support::ulittle32_t BoundDelayImportTable; | |||
218 | support::ulittle32_t UnloadDelayImportTable; | |||
219 | support::ulittle32_t TimeStamp; | |||
220 | }; | |||
221 | ||||
222 | struct export_directory_table_entry { | |||
223 | support::ulittle32_t ExportFlags; | |||
224 | support::ulittle32_t TimeDateStamp; | |||
225 | support::ulittle16_t MajorVersion; | |||
226 | support::ulittle16_t MinorVersion; | |||
227 | support::ulittle32_t NameRVA; | |||
228 | support::ulittle32_t OrdinalBase; | |||
229 | support::ulittle32_t AddressTableEntries; | |||
230 | support::ulittle32_t NumberOfNamePointers; | |||
231 | support::ulittle32_t ExportAddressTableRVA; | |||
232 | support::ulittle32_t NamePointerRVA; | |||
233 | support::ulittle32_t OrdinalTableRVA; | |||
234 | }; | |||
235 | ||||
236 | union export_address_table_entry { | |||
237 | support::ulittle32_t ExportRVA; | |||
238 | support::ulittle32_t ForwarderRVA; | |||
239 | }; | |||
240 | ||||
241 | using export_name_pointer_table_entry = support::ulittle32_t; | |||
242 | using export_ordinal_table_entry = support::ulittle16_t; | |||
243 | ||||
244 | struct StringTableOffset { | |||
245 | support::ulittle32_t Zeroes; | |||
246 | support::ulittle32_t Offset; | |||
247 | }; | |||
248 | ||||
249 | template <typename SectionNumberType> | |||
250 | struct coff_symbol { | |||
251 | union { | |||
252 | char ShortName[COFF::NameSize]; | |||
253 | StringTableOffset Offset; | |||
254 | } Name; | |||
255 | ||||
256 | support::ulittle32_t Value; | |||
257 | SectionNumberType SectionNumber; | |||
258 | ||||
259 | support::ulittle16_t Type; | |||
260 | ||||
261 | uint8_t StorageClass; | |||
262 | uint8_t NumberOfAuxSymbols; | |||
263 | }; | |||
264 | ||||
265 | using coff_symbol16 = coff_symbol<support::ulittle16_t>; | |||
266 | using coff_symbol32 = coff_symbol<support::ulittle32_t>; | |||
267 | ||||
268 | // Contains only common parts of coff_symbol16 and coff_symbol32. | |||
269 | struct coff_symbol_generic { | |||
270 | union { | |||
271 | char ShortName[COFF::NameSize]; | |||
272 | StringTableOffset Offset; | |||
273 | } Name; | |||
274 | support::ulittle32_t Value; | |||
275 | }; | |||
276 | ||||
277 | struct coff_aux_section_definition; | |||
278 | struct coff_aux_weak_external; | |||
279 | ||||
280 | class COFFSymbolRef { | |||
281 | public: | |||
282 | COFFSymbolRef() = default; | |||
283 | COFFSymbolRef(const coff_symbol16 *CS) : CS16(CS) {} | |||
284 | COFFSymbolRef(const coff_symbol32 *CS) : CS32(CS) {} | |||
285 | ||||
286 | const void *getRawPtr() const { | |||
287 | return CS16 ? static_cast<const void *>(CS16) : CS32; | |||
288 | } | |||
289 | ||||
290 | const coff_symbol_generic *getGeneric() const { | |||
291 | if (CS16) | |||
292 | return reinterpret_cast<const coff_symbol_generic *>(CS16); | |||
293 | return reinterpret_cast<const coff_symbol_generic *>(CS32); | |||
294 | } | |||
295 | ||||
296 | friend bool operator<(COFFSymbolRef A, COFFSymbolRef B) { | |||
297 | return A.getRawPtr() < B.getRawPtr(); | |||
298 | } | |||
299 | ||||
300 | bool isBigObj() const { | |||
301 | if (CS16) | |||
302 | return false; | |||
303 | if (CS32) | |||
304 | return true; | |||
305 | llvm_unreachable("COFFSymbolRef points to nothing!")__builtin_unreachable(); | |||
306 | } | |||
307 | ||||
308 | const char *getShortName() const { | |||
309 | return CS16 ? CS16->Name.ShortName : CS32->Name.ShortName; | |||
310 | } | |||
311 | ||||
312 | const StringTableOffset &getStringTableOffset() const { | |||
313 | assert(isSet() && "COFFSymbolRef points to nothing!")((void)0); | |||
314 | return CS16 ? CS16->Name.Offset : CS32->Name.Offset; | |||
315 | } | |||
316 | ||||
317 | uint32_t getValue() const { | |||
318 | assert(isSet() && "COFFSymbolRef points to nothing!")((void)0); | |||
319 | return CS16 ? CS16->Value : CS32->Value; | |||
| ||||
320 | } | |||
321 | ||||
322 | int32_t getSectionNumber() const { | |||
323 | assert(isSet() && "COFFSymbolRef points to nothing!")((void)0); | |||
324 | if (CS16) { | |||
325 | // Reserved sections are returned as negative numbers. | |||
326 | if (CS16->SectionNumber <= COFF::MaxNumberOfSections16) | |||
327 | return CS16->SectionNumber; | |||
328 | return static_cast<int16_t>(CS16->SectionNumber); | |||
329 | } | |||
330 | return static_cast<int32_t>(CS32->SectionNumber); | |||
331 | } | |||
332 | ||||
333 | uint16_t getType() const { | |||
334 | assert(isSet() && "COFFSymbolRef points to nothing!")((void)0); | |||
335 | return CS16 ? CS16->Type : CS32->Type; | |||
336 | } | |||
337 | ||||
338 | uint8_t getStorageClass() const { | |||
339 | assert(isSet() && "COFFSymbolRef points to nothing!")((void)0); | |||
340 | return CS16 ? CS16->StorageClass : CS32->StorageClass; | |||
341 | } | |||
342 | ||||
343 | uint8_t getNumberOfAuxSymbols() const { | |||
344 | assert(isSet() && "COFFSymbolRef points to nothing!")((void)0); | |||
345 | return CS16 ? CS16->NumberOfAuxSymbols : CS32->NumberOfAuxSymbols; | |||
346 | } | |||
347 | ||||
348 | uint8_t getBaseType() const { return getType() & 0x0F; } | |||
349 | ||||
350 | uint8_t getComplexType() const { | |||
351 | return (getType() & 0xF0) >> COFF::SCT_COMPLEX_TYPE_SHIFT; | |||
352 | } | |||
353 | ||||
354 | template <typename T> const T *getAux() const { | |||
355 | return CS16 ? reinterpret_cast<const T *>(CS16 + 1) | |||
356 | : reinterpret_cast<const T *>(CS32 + 1); | |||
357 | } | |||
358 | ||||
359 | const coff_aux_section_definition *getSectionDefinition() const { | |||
360 | if (!getNumberOfAuxSymbols() || | |||
361 | getStorageClass() != COFF::IMAGE_SYM_CLASS_STATIC) | |||
362 | return nullptr; | |||
363 | return getAux<coff_aux_section_definition>(); | |||
364 | } | |||
365 | ||||
366 | const coff_aux_weak_external *getWeakExternal() const { | |||
367 | if (!getNumberOfAuxSymbols() || | |||
368 | getStorageClass() != COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) | |||
369 | return nullptr; | |||
370 | return getAux<coff_aux_weak_external>(); | |||
371 | } | |||
372 | ||||
373 | bool isAbsolute() const { | |||
374 | return getSectionNumber() == -1; | |||
375 | } | |||
376 | ||||
377 | bool isExternal() const { | |||
378 | return getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL; | |||
379 | } | |||
380 | ||||
381 | bool isCommon() const { | |||
382 | return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED && | |||
383 | getValue() != 0; | |||
384 | } | |||
385 | ||||
386 | bool isUndefined() const { | |||
387 | return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED && | |||
388 | getValue() == 0; | |||
389 | } | |||
390 | ||||
391 | bool isWeakExternal() const { | |||
392 | return getStorageClass() == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL; | |||
393 | } | |||
394 | ||||
395 | bool isFunctionDefinition() const { | |||
396 | return isExternal() && getBaseType() == COFF::IMAGE_SYM_TYPE_NULL && | |||
397 | getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION && | |||
398 | !COFF::isReservedSectionNumber(getSectionNumber()); | |||
399 | } | |||
400 | ||||
401 | bool isFunctionLineInfo() const { | |||
402 | return getStorageClass() == COFF::IMAGE_SYM_CLASS_FUNCTION; | |||
403 | } | |||
404 | ||||
405 | bool isAnyUndefined() const { | |||
406 | return isUndefined() || isWeakExternal(); | |||
407 | } | |||
408 | ||||
409 | bool isFileRecord() const { | |||
410 | return getStorageClass() == COFF::IMAGE_SYM_CLASS_FILE; | |||
411 | } | |||
412 | ||||
413 | bool isSection() const { | |||
414 | return getStorageClass() == COFF::IMAGE_SYM_CLASS_SECTION; | |||
415 | } | |||
416 | ||||
417 | bool isSectionDefinition() const { | |||
418 | // C++/CLI creates external ABS symbols for non-const appdomain globals. | |||
419 | // These are also followed by an auxiliary section definition. | |||
420 | bool isAppdomainGlobal = | |||
421 | getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL && | |||
422 | getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE; | |||
423 | bool isOrdinarySection = getStorageClass() == COFF::IMAGE_SYM_CLASS_STATIC; | |||
424 | if (!getNumberOfAuxSymbols()) | |||
425 | return false; | |||
426 | return isAppdomainGlobal || isOrdinarySection; | |||
427 | } | |||
428 | ||||
429 | bool isCLRToken() const { | |||
430 | return getStorageClass() == COFF::IMAGE_SYM_CLASS_CLR_TOKEN; | |||
431 | } | |||
432 | ||||
433 | private: | |||
434 | bool isSet() const { return CS16 || CS32; } | |||
435 | ||||
436 | const coff_symbol16 *CS16 = nullptr; | |||
437 | const coff_symbol32 *CS32 = nullptr; | |||
438 | }; | |||
439 | ||||
440 | struct coff_section { | |||
441 | char Name[COFF::NameSize]; | |||
442 | support::ulittle32_t VirtualSize; | |||
443 | support::ulittle32_t VirtualAddress; | |||
444 | support::ulittle32_t SizeOfRawData; | |||
445 | support::ulittle32_t PointerToRawData; | |||
446 | support::ulittle32_t PointerToRelocations; | |||
447 | support::ulittle32_t PointerToLinenumbers; | |||
448 | support::ulittle16_t NumberOfRelocations; | |||
449 | support::ulittle16_t NumberOfLinenumbers; | |||
450 | support::ulittle32_t Characteristics; | |||
451 | ||||
452 | // Returns true if the actual number of relocations is stored in | |||
453 | // VirtualAddress field of the first relocation table entry. | |||
454 | bool hasExtendedRelocations() const { | |||
455 | return (Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) && | |||
456 | NumberOfRelocations == UINT16_MAX0xffff; | |||
457 | } | |||
458 | ||||
459 | uint32_t getAlignment() const { | |||
460 | // The IMAGE_SCN_TYPE_NO_PAD bit is a legacy way of getting to | |||
461 | // IMAGE_SCN_ALIGN_1BYTES. | |||
462 | if (Characteristics & COFF::IMAGE_SCN_TYPE_NO_PAD) | |||
463 | return 1; | |||
464 | ||||
465 | // Bit [20:24] contains section alignment. 0 means use a default alignment | |||
466 | // of 16. | |||
467 | uint32_t Shift = (Characteristics >> 20) & 0xF; | |||
468 | if (Shift > 0) | |||
469 | return 1U << (Shift - 1); | |||
470 | return 16; | |||
471 | } | |||
472 | }; | |||
473 | ||||
474 | struct coff_relocation { | |||
475 | support::ulittle32_t VirtualAddress; | |||
476 | support::ulittle32_t SymbolTableIndex; | |||
477 | support::ulittle16_t Type; | |||
478 | }; | |||
479 | ||||
480 | struct coff_aux_function_definition { | |||
481 | support::ulittle32_t TagIndex; | |||
482 | support::ulittle32_t TotalSize; | |||
483 | support::ulittle32_t PointerToLinenumber; | |||
484 | support::ulittle32_t PointerToNextFunction; | |||
485 | char Unused1[2]; | |||
486 | }; | |||
487 | ||||
488 | static_assert(sizeof(coff_aux_function_definition) == 18, | |||
489 | "auxiliary entry must be 18 bytes"); | |||
490 | ||||
491 | struct coff_aux_bf_and_ef_symbol { | |||
492 | char Unused1[4]; | |||
493 | support::ulittle16_t Linenumber; | |||
494 | char Unused2[6]; | |||
495 | support::ulittle32_t PointerToNextFunction; | |||
496 | char Unused3[2]; | |||
497 | }; | |||
498 | ||||
499 | static_assert(sizeof(coff_aux_bf_and_ef_symbol) == 18, | |||
500 | "auxiliary entry must be 18 bytes"); | |||
501 | ||||
502 | struct coff_aux_weak_external { | |||
503 | support::ulittle32_t TagIndex; | |||
504 | support::ulittle32_t Characteristics; | |||
505 | char Unused1[10]; | |||
506 | }; | |||
507 | ||||
508 | static_assert(sizeof(coff_aux_weak_external) == 18, | |||
509 | "auxiliary entry must be 18 bytes"); | |||
510 | ||||
511 | struct coff_aux_section_definition { | |||
512 | support::ulittle32_t Length; | |||
513 | support::ulittle16_t NumberOfRelocations; | |||
514 | support::ulittle16_t NumberOfLinenumbers; | |||
515 | support::ulittle32_t CheckSum; | |||
516 | support::ulittle16_t NumberLowPart; | |||
517 | uint8_t Selection; | |||
518 | uint8_t Unused; | |||
519 | support::ulittle16_t NumberHighPart; | |||
520 | int32_t getNumber(bool IsBigObj) const { | |||
521 | uint32_t Number = static_cast<uint32_t>(NumberLowPart); | |||
522 | if (IsBigObj) | |||
523 | Number |= static_cast<uint32_t>(NumberHighPart) << 16; | |||
524 | return static_cast<int32_t>(Number); | |||
525 | } | |||
526 | }; | |||
527 | ||||
528 | static_assert(sizeof(coff_aux_section_definition) == 18, | |||
529 | "auxiliary entry must be 18 bytes"); | |||
530 | ||||
531 | struct coff_aux_clr_token { | |||
532 | uint8_t AuxType; | |||
533 | uint8_t Reserved; | |||
534 | support::ulittle32_t SymbolTableIndex; | |||
535 | char MBZ[12]; | |||
536 | }; | |||
537 | ||||
538 | static_assert(sizeof(coff_aux_clr_token) == 18, | |||
539 | "auxiliary entry must be 18 bytes"); | |||
540 | ||||
541 | struct coff_import_header { | |||
542 | support::ulittle16_t Sig1; | |||
543 | support::ulittle16_t Sig2; | |||
544 | support::ulittle16_t Version; | |||
545 | support::ulittle16_t Machine; | |||
546 | support::ulittle32_t TimeDateStamp; | |||
547 | support::ulittle32_t SizeOfData; | |||
548 | support::ulittle16_t OrdinalHint; | |||
549 | support::ulittle16_t TypeInfo; | |||
550 | ||||
551 | int getType() const { return TypeInfo & 0x3; } | |||
552 | int getNameType() const { return (TypeInfo >> 2) & 0x7; } | |||
553 | }; | |||
554 | ||||
555 | struct coff_import_directory_table_entry { | |||
556 | support::ulittle32_t ImportLookupTableRVA; | |||
557 | support::ulittle32_t TimeDateStamp; | |||
558 | support::ulittle32_t ForwarderChain; | |||
559 | support::ulittle32_t NameRVA; | |||
560 | support::ulittle32_t ImportAddressTableRVA; | |||
561 | ||||
562 | bool isNull() const { | |||
563 | return ImportLookupTableRVA == 0 && TimeDateStamp == 0 && | |||
564 | ForwarderChain == 0 && NameRVA == 0 && ImportAddressTableRVA == 0; | |||
565 | } | |||
566 | }; | |||
567 | ||||
568 | template <typename IntTy> | |||
569 | struct coff_tls_directory { | |||
570 | IntTy StartAddressOfRawData; | |||
571 | IntTy EndAddressOfRawData; | |||
572 | IntTy AddressOfIndex; | |||
573 | IntTy AddressOfCallBacks; | |||
574 | support::ulittle32_t SizeOfZeroFill; | |||
575 | support::ulittle32_t Characteristics; | |||
576 | ||||
577 | uint32_t getAlignment() const { | |||
578 | // Bit [20:24] contains section alignment. | |||
579 | uint32_t Shift = (Characteristics & COFF::IMAGE_SCN_ALIGN_MASK) >> 20; | |||
580 | if (Shift > 0) | |||
581 | return 1U << (Shift - 1); | |||
582 | return 0; | |||
583 | } | |||
584 | ||||
585 | void setAlignment(uint32_t Align) { | |||
586 | uint32_t AlignBits = 0; | |||
587 | if (Align) { | |||
588 | assert(llvm::isPowerOf2_32(Align) && "alignment is not a power of 2")((void)0); | |||
589 | assert(llvm::Log2_32(Align) <= 13 && "alignment requested is too large")((void)0); | |||
590 | AlignBits = (llvm::Log2_32(Align) + 1) << 20; | |||
591 | } | |||
592 | Characteristics = | |||
593 | (Characteristics & ~COFF::IMAGE_SCN_ALIGN_MASK) | AlignBits; | |||
594 | } | |||
595 | }; | |||
596 | ||||
597 | using coff_tls_directory32 = coff_tls_directory<support::little32_t>; | |||
598 | using coff_tls_directory64 = coff_tls_directory<support::little64_t>; | |||
599 | ||||
600 | /// Bits in control flow guard flags as we understand them. | |||
601 | enum class coff_guard_flags : uint32_t { | |||
602 | CFInstrumented = 0x00000100, | |||
603 | HasFidTable = 0x00000400, | |||
604 | ProtectDelayLoadIAT = 0x00001000, | |||
605 | DelayLoadIATSection = 0x00002000, // Delay load in separate section | |||
606 | HasLongJmpTable = 0x00010000, | |||
607 | HasEHContTable = 0x00400000, | |||
608 | FidTableHasFlags = 0x10000000, // Indicates that fid tables are 5 bytes | |||
609 | }; | |||
610 | ||||
611 | enum class frame_type : uint16_t { Fpo = 0, Trap = 1, Tss = 2, NonFpo = 3 }; | |||
612 | ||||
613 | struct coff_load_config_code_integrity { | |||
614 | support::ulittle16_t Flags; | |||
615 | support::ulittle16_t Catalog; | |||
616 | support::ulittle32_t CatalogOffset; | |||
617 | support::ulittle32_t Reserved; | |||
618 | }; | |||
619 | ||||
620 | /// 32-bit load config (IMAGE_LOAD_CONFIG_DIRECTORY32) | |||
621 | struct coff_load_configuration32 { | |||
622 | support::ulittle32_t Size; | |||
623 | support::ulittle32_t TimeDateStamp; | |||
624 | support::ulittle16_t MajorVersion; | |||
625 | support::ulittle16_t MinorVersion; | |||
626 | support::ulittle32_t GlobalFlagsClear; | |||
627 | support::ulittle32_t GlobalFlagsSet; | |||
628 | support::ulittle32_t CriticalSectionDefaultTimeout; | |||
629 | support::ulittle32_t DeCommitFreeBlockThreshold; | |||
630 | support::ulittle32_t DeCommitTotalFreeThreshold; | |||
631 | support::ulittle32_t LockPrefixTable; | |||
632 | support::ulittle32_t MaximumAllocationSize; | |||
633 | support::ulittle32_t VirtualMemoryThreshold; | |||
634 | support::ulittle32_t ProcessAffinityMask; | |||
635 | support::ulittle32_t ProcessHeapFlags; | |||
636 | support::ulittle16_t CSDVersion; | |||
637 | support::ulittle16_t DependentLoadFlags; | |||
638 | support::ulittle32_t EditList; | |||
639 | support::ulittle32_t SecurityCookie; | |||
640 | support::ulittle32_t SEHandlerTable; | |||
641 | support::ulittle32_t SEHandlerCount; | |||
642 | ||||
643 | // Added in MSVC 2015 for /guard:cf. | |||
644 | support::ulittle32_t GuardCFCheckFunction; | |||
645 | support::ulittle32_t GuardCFCheckDispatch; | |||
646 | support::ulittle32_t GuardCFFunctionTable; | |||
647 | support::ulittle32_t GuardCFFunctionCount; | |||
648 | support::ulittle32_t GuardFlags; // coff_guard_flags | |||
649 | ||||
650 | // Added in MSVC 2017 | |||
651 | coff_load_config_code_integrity CodeIntegrity; | |||
652 | support::ulittle32_t GuardAddressTakenIatEntryTable; | |||
653 | support::ulittle32_t GuardAddressTakenIatEntryCount; | |||
654 | support::ulittle32_t GuardLongJumpTargetTable; | |||
655 | support::ulittle32_t GuardLongJumpTargetCount; | |||
656 | support::ulittle32_t DynamicValueRelocTable; | |||
657 | support::ulittle32_t CHPEMetadataPointer; | |||
658 | support::ulittle32_t GuardRFFailureRoutine; | |||
659 | support::ulittle32_t GuardRFFailureRoutineFunctionPointer; | |||
660 | support::ulittle32_t DynamicValueRelocTableOffset; | |||
661 | support::ulittle16_t DynamicValueRelocTableSection; | |||
662 | support::ulittle16_t Reserved2; | |||
663 | support::ulittle32_t GuardRFVerifyStackPointerFunctionPointer; | |||
664 | support::ulittle32_t HotPatchTableOffset; | |||
665 | ||||
666 | // Added in MSVC 2019 | |||
667 | support::ulittle32_t Reserved3; | |||
668 | support::ulittle32_t EnclaveConfigurationPointer; | |||
669 | support::ulittle32_t VolatileMetadataPointer; | |||
670 | support::ulittle32_t GuardEHContinuationTable; | |||
671 | support::ulittle32_t GuardEHContinuationCount; | |||
672 | support::ulittle32_t GuardXFGCheckFunctionPointer; | |||
673 | support::ulittle32_t GuardXFGDispatchFunctionPointer; | |||
674 | support::ulittle32_t GuardXFGTableDispatchFunctionPointer; | |||
675 | support::ulittle32_t CastGuardOsDeterminedFailureMode; | |||
676 | }; | |||
677 | ||||
678 | /// 64-bit load config (IMAGE_LOAD_CONFIG_DIRECTORY64) | |||
679 | struct coff_load_configuration64 { | |||
680 | support::ulittle32_t Size; | |||
681 | support::ulittle32_t TimeDateStamp; | |||
682 | support::ulittle16_t MajorVersion; | |||
683 | support::ulittle16_t MinorVersion; | |||
684 | support::ulittle32_t GlobalFlagsClear; | |||
685 | support::ulittle32_t GlobalFlagsSet; | |||
686 | support::ulittle32_t CriticalSectionDefaultTimeout; | |||
687 | support::ulittle64_t DeCommitFreeBlockThreshold; | |||
688 | support::ulittle64_t DeCommitTotalFreeThreshold; | |||
689 | support::ulittle64_t LockPrefixTable; | |||
690 | support::ulittle64_t MaximumAllocationSize; | |||
691 | support::ulittle64_t VirtualMemoryThreshold; | |||
692 | support::ulittle64_t ProcessAffinityMask; | |||
693 | support::ulittle32_t ProcessHeapFlags; | |||
694 | support::ulittle16_t CSDVersion; | |||
695 | support::ulittle16_t DependentLoadFlags; | |||
696 | support::ulittle64_t EditList; | |||
697 | support::ulittle64_t SecurityCookie; | |||
698 | support::ulittle64_t SEHandlerTable; | |||
699 | support::ulittle64_t SEHandlerCount; | |||
700 | ||||
701 | // Added in MSVC 2015 for /guard:cf. | |||
702 | support::ulittle64_t GuardCFCheckFunction; | |||
703 | support::ulittle64_t GuardCFCheckDispatch; | |||
704 | support::ulittle64_t GuardCFFunctionTable; | |||
705 | support::ulittle64_t GuardCFFunctionCount; | |||
706 | support::ulittle32_t GuardFlags; | |||
707 | ||||
708 | // Added in MSVC 2017 | |||
709 | coff_load_config_code_integrity CodeIntegrity; | |||
710 | support::ulittle64_t GuardAddressTakenIatEntryTable; | |||
711 | support::ulittle64_t GuardAddressTakenIatEntryCount; | |||
712 | support::ulittle64_t GuardLongJumpTargetTable; | |||
713 | support::ulittle64_t GuardLongJumpTargetCount; | |||
714 | support::ulittle64_t DynamicValueRelocTable; | |||
715 | support::ulittle64_t CHPEMetadataPointer; | |||
716 | support::ulittle64_t GuardRFFailureRoutine; | |||
717 | support::ulittle64_t GuardRFFailureRoutineFunctionPointer; | |||
718 | support::ulittle32_t DynamicValueRelocTableOffset; | |||
719 | support::ulittle16_t DynamicValueRelocTableSection; | |||
720 | support::ulittle16_t Reserved2; | |||
721 | support::ulittle64_t GuardRFVerifyStackPointerFunctionPointer; | |||
722 | support::ulittle32_t HotPatchTableOffset; | |||
723 | ||||
724 | // Added in MSVC 2019 | |||
725 | support::ulittle32_t Reserved3; | |||
726 | support::ulittle64_t EnclaveConfigurationPointer; | |||
727 | support::ulittle64_t VolatileMetadataPointer; | |||
728 | support::ulittle64_t GuardEHContinuationTable; | |||
729 | support::ulittle64_t GuardEHContinuationCount; | |||
730 | support::ulittle64_t GuardXFGCheckFunctionPointer; | |||
731 | support::ulittle64_t GuardXFGDispatchFunctionPointer; | |||
732 | support::ulittle64_t GuardXFGTableDispatchFunctionPointer; | |||
733 | support::ulittle64_t CastGuardOsDeterminedFailureMode; | |||
734 | }; | |||
735 | ||||
736 | struct coff_runtime_function_x64 { | |||
737 | support::ulittle32_t BeginAddress; | |||
738 | support::ulittle32_t EndAddress; | |||
739 | support::ulittle32_t UnwindInformation; | |||
740 | }; | |||
741 | ||||
742 | struct coff_base_reloc_block_header { | |||
743 | support::ulittle32_t PageRVA; | |||
744 | support::ulittle32_t BlockSize; | |||
745 | }; | |||
746 | ||||
747 | struct coff_base_reloc_block_entry { | |||
748 | support::ulittle16_t Data; | |||
749 | ||||
750 | int getType() const { return Data >> 12; } | |||
751 | int getOffset() const { return Data & ((1 << 12) - 1); } | |||
752 | }; | |||
753 | ||||
754 | struct coff_resource_dir_entry { | |||
755 | union { | |||
756 | support::ulittle32_t NameOffset; | |||
757 | support::ulittle32_t ID; | |||
758 | uint32_t getNameOffset() const { | |||
759 | return maskTrailingOnes<uint32_t>(31) & NameOffset; | |||
760 | } | |||
761 | // Even though the PE/COFF spec doesn't mention this, the high bit of a name | |||
762 | // offset is set. | |||
763 | void setNameOffset(uint32_t Offset) { NameOffset = Offset | (1 << 31); } | |||
764 | } Identifier; | |||
765 | union { | |||
766 | support::ulittle32_t DataEntryOffset; | |||
767 | support::ulittle32_t SubdirOffset; | |||
768 | ||||
769 | bool isSubDir() const { return SubdirOffset >> 31; } | |||
770 | uint32_t value() const { | |||
771 | return maskTrailingOnes<uint32_t>(31) & SubdirOffset; | |||
772 | } | |||
773 | ||||
774 | } Offset; | |||
775 | }; | |||
776 | ||||
777 | struct coff_resource_data_entry { | |||
778 | support::ulittle32_t DataRVA; | |||
779 | support::ulittle32_t DataSize; | |||
780 | support::ulittle32_t Codepage; | |||
781 | support::ulittle32_t Reserved; | |||
782 | }; | |||
783 | ||||
784 | struct coff_resource_dir_table { | |||
785 | support::ulittle32_t Characteristics; | |||
786 | support::ulittle32_t TimeDateStamp; | |||
787 | support::ulittle16_t MajorVersion; | |||
788 | support::ulittle16_t MinorVersion; | |||
789 | support::ulittle16_t NumberOfNameEntries; | |||
790 | support::ulittle16_t NumberOfIDEntries; | |||
791 | }; | |||
792 | ||||
793 | struct debug_h_header { | |||
794 | support::ulittle32_t Magic; | |||
795 | support::ulittle16_t Version; | |||
796 | support::ulittle16_t HashAlgorithm; | |||
797 | }; | |||
798 | ||||
799 | class COFFObjectFile : public ObjectFile { | |||
800 | private: | |||
801 | COFFObjectFile(MemoryBufferRef Object); | |||
802 | ||||
803 | friend class ImportDirectoryEntryRef; | |||
804 | friend class ExportDirectoryEntryRef; | |||
805 | const coff_file_header *COFFHeader; | |||
806 | const coff_bigobj_file_header *COFFBigObjHeader; | |||
807 | const pe32_header *PE32Header; | |||
808 | const pe32plus_header *PE32PlusHeader; | |||
809 | const data_directory *DataDirectory; | |||
810 | const coff_section *SectionTable; | |||
811 | const coff_symbol16 *SymbolTable16; | |||
812 | const coff_symbol32 *SymbolTable32; | |||
813 | const char *StringTable; | |||
814 | uint32_t StringTableSize; | |||
815 | const coff_import_directory_table_entry *ImportDirectory; | |||
816 | const delay_import_directory_table_entry *DelayImportDirectory; | |||
817 | uint32_t NumberOfDelayImportDirectory; | |||
818 | const export_directory_table_entry *ExportDirectory; | |||
819 | const coff_base_reloc_block_header *BaseRelocHeader; | |||
820 | const coff_base_reloc_block_header *BaseRelocEnd; | |||
821 | const debug_directory *DebugDirectoryBegin; | |||
822 | const debug_directory *DebugDirectoryEnd; | |||
823 | const coff_tls_directory32 *TLSDirectory32; | |||
824 | const coff_tls_directory64 *TLSDirectory64; | |||
825 | // Either coff_load_configuration32 or coff_load_configuration64. | |||
826 | const void *LoadConfig = nullptr; | |||
827 | ||||
828 | Expected<StringRef> getString(uint32_t offset) const; | |||
829 | ||||
830 | template <typename coff_symbol_type> | |||
831 | const coff_symbol_type *toSymb(DataRefImpl Symb) const; | |||
832 | const coff_section *toSec(DataRefImpl Sec) const; | |||
833 | const coff_relocation *toRel(DataRefImpl Rel) const; | |||
834 | ||||
835 | // Finish initializing the object and return success or an error. | |||
836 | Error initialize(); | |||
837 | ||||
838 | Error initSymbolTablePtr(); | |||
839 | Error initImportTablePtr(); | |||
840 | Error initDelayImportTablePtr(); | |||
841 | Error initExportTablePtr(); | |||
842 | Error initBaseRelocPtr(); | |||
843 | Error initDebugDirectoryPtr(); | |||
844 | Error initTLSDirectoryPtr(); | |||
845 | Error initLoadConfigPtr(); | |||
846 | ||||
847 | public: | |||
848 | static Expected<std::unique_ptr<COFFObjectFile>> | |||
849 | create(MemoryBufferRef Object); | |||
850 | ||||
851 | uintptr_t getSymbolTable() const { | |||
852 | if (SymbolTable16) | |||
853 | return reinterpret_cast<uintptr_t>(SymbolTable16); | |||
854 | if (SymbolTable32) | |||
855 | return reinterpret_cast<uintptr_t>(SymbolTable32); | |||
856 | return uintptr_t(0); | |||
857 | } | |||
858 | ||||
859 | uint16_t getMachine() const { | |||
860 | if (COFFHeader) | |||
861 | return COFFHeader->Machine; | |||
862 | if (COFFBigObjHeader) | |||
863 | return COFFBigObjHeader->Machine; | |||
864 | llvm_unreachable("no COFF header!")__builtin_unreachable(); | |||
865 | } | |||
866 | ||||
867 | uint16_t getSizeOfOptionalHeader() const { | |||
868 | if (COFFHeader) | |||
869 | return COFFHeader->isImportLibrary() ? 0 | |||
870 | : COFFHeader->SizeOfOptionalHeader; | |||
871 | // bigobj doesn't have this field. | |||
872 | if (COFFBigObjHeader) | |||
873 | return 0; | |||
874 | llvm_unreachable("no COFF header!")__builtin_unreachable(); | |||
875 | } | |||
876 | ||||
877 | uint16_t getCharacteristics() const { | |||
878 | if (COFFHeader) | |||
879 | return COFFHeader->isImportLibrary() ? 0 : COFFHeader->Characteristics; | |||
880 | // bigobj doesn't have characteristics to speak of, | |||
881 | // editbin will silently lie to you if you attempt to set any. | |||
882 | if (COFFBigObjHeader) | |||
883 | return 0; | |||
884 | llvm_unreachable("no COFF header!")__builtin_unreachable(); | |||
885 | } | |||
886 | ||||
887 | uint32_t getTimeDateStamp() const { | |||
888 | if (COFFHeader) | |||
889 | return COFFHeader->TimeDateStamp; | |||
890 | if (COFFBigObjHeader) | |||
891 | return COFFBigObjHeader->TimeDateStamp; | |||
892 | llvm_unreachable("no COFF header!")__builtin_unreachable(); | |||
893 | } | |||
894 | ||||
895 | uint32_t getNumberOfSections() const { | |||
896 | if (COFFHeader) | |||
897 | return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSections; | |||
898 | if (COFFBigObjHeader) | |||
899 | return COFFBigObjHeader->NumberOfSections; | |||
900 | llvm_unreachable("no COFF header!")__builtin_unreachable(); | |||
901 | } | |||
902 | ||||
903 | uint32_t getPointerToSymbolTable() const { | |||
904 | if (COFFHeader) | |||
905 | return COFFHeader->isImportLibrary() ? 0 | |||
906 | : COFFHeader->PointerToSymbolTable; | |||
907 | if (COFFBigObjHeader) | |||
908 | return COFFBigObjHeader->PointerToSymbolTable; | |||
909 | llvm_unreachable("no COFF header!")__builtin_unreachable(); | |||
910 | } | |||
911 | ||||
912 | uint32_t getRawNumberOfSymbols() const { | |||
913 | if (COFFHeader) | |||
914 | return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSymbols; | |||
915 | if (COFFBigObjHeader) | |||
916 | return COFFBigObjHeader->NumberOfSymbols; | |||
917 | llvm_unreachable("no COFF header!")__builtin_unreachable(); | |||
918 | } | |||
919 | ||||
920 | uint32_t getNumberOfSymbols() const { | |||
921 | if (!SymbolTable16 && !SymbolTable32) | |||
922 | return 0; | |||
923 | return getRawNumberOfSymbols(); | |||
924 | } | |||
925 | ||||
926 | uint32_t getStringTableSize() const { return StringTableSize; } | |||
927 | ||||
928 | const coff_load_configuration32 *getLoadConfig32() const { | |||
929 | assert(!is64())((void)0); | |||
930 | return reinterpret_cast<const coff_load_configuration32 *>(LoadConfig); | |||
931 | } | |||
932 | ||||
933 | const coff_load_configuration64 *getLoadConfig64() const { | |||
934 | assert(is64())((void)0); | |||
935 | return reinterpret_cast<const coff_load_configuration64 *>(LoadConfig); | |||
936 | } | |||
937 | StringRef getRelocationTypeName(uint16_t Type) const; | |||
938 | ||||
939 | protected: | |||
940 | void moveSymbolNext(DataRefImpl &Symb) const override; | |||
941 | Expected<StringRef> getSymbolName(DataRefImpl Symb) const override; | |||
942 | Expected<uint64_t> getSymbolAddress(DataRefImpl Symb) const override; | |||
943 | uint32_t getSymbolAlignment(DataRefImpl Symb) const override; | |||
944 | uint64_t getSymbolValueImpl(DataRefImpl Symb) const override; | |||
945 | uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override; | |||
946 | Expected<uint32_t> getSymbolFlags(DataRefImpl Symb) const override; | |||
947 | Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override; | |||
948 | Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override; | |||
949 | void moveSectionNext(DataRefImpl &Sec) const override; | |||
950 | Expected<StringRef> getSectionName(DataRefImpl Sec) const override; | |||
951 | uint64_t getSectionAddress(DataRefImpl Sec) const override; | |||
952 | uint64_t getSectionIndex(DataRefImpl Sec) const override; | |||
953 | uint64_t getSectionSize(DataRefImpl Sec) const override; | |||
954 | Expected<ArrayRef<uint8_t>> | |||
955 | getSectionContents(DataRefImpl Sec) const override; | |||
956 | uint64_t getSectionAlignment(DataRefImpl Sec) const override; | |||
957 | bool isSectionCompressed(DataRefImpl Sec) const override; | |||
958 | bool isSectionText(DataRefImpl Sec) const override; | |||
959 | bool isSectionData(DataRefImpl Sec) const override; | |||
960 | bool isSectionBSS(DataRefImpl Sec) const override; | |||
961 | bool isSectionVirtual(DataRefImpl Sec) const override; | |||
962 | bool isDebugSection(DataRefImpl Sec) const override; | |||
963 | relocation_iterator section_rel_begin(DataRefImpl Sec) const override; | |||
964 | relocation_iterator section_rel_end(DataRefImpl Sec) const override; | |||
965 | ||||
966 | void moveRelocationNext(DataRefImpl &Rel) const override; | |||
967 | uint64_t getRelocationOffset(DataRefImpl Rel) const override; | |||
968 | symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override; | |||
969 | uint64_t getRelocationType(DataRefImpl Rel) const override; | |||
970 | void getRelocationTypeName(DataRefImpl Rel, | |||
971 | SmallVectorImpl<char> &Result) const override; | |||
972 | ||||
973 | public: | |||
974 | basic_symbol_iterator symbol_begin() const override; | |||
975 | basic_symbol_iterator symbol_end() const override; | |||
976 | section_iterator section_begin() const override; | |||
977 | section_iterator section_end() const override; | |||
978 | ||||
979 | const coff_section *getCOFFSection(const SectionRef &Section) const; | |||
980 | COFFSymbolRef getCOFFSymbol(const DataRefImpl &Ref) const; | |||
981 | COFFSymbolRef getCOFFSymbol(const SymbolRef &Symbol) const; | |||
982 | const coff_relocation *getCOFFRelocation(const RelocationRef &Reloc) const; | |||
983 | unsigned getSectionID(SectionRef Sec) const; | |||
984 | unsigned getSymbolSectionID(SymbolRef Sym) const; | |||
985 | ||||
986 | uint8_t getBytesInAddress() const override; | |||
987 | StringRef getFileFormatName() const override; | |||
988 | Triple::ArchType getArch() const override; | |||
989 | Expected<uint64_t> getStartAddress() const override; | |||
990 | SubtargetFeatures getFeatures() const override { return SubtargetFeatures(); } | |||
991 | ||||
992 | import_directory_iterator import_directory_begin() const; | |||
993 | import_directory_iterator import_directory_end() const; | |||
994 | delay_import_directory_iterator delay_import_directory_begin() const; | |||
995 | delay_import_directory_iterator delay_import_directory_end() const; | |||
996 | export_directory_iterator export_directory_begin() const; | |||
997 | export_directory_iterator export_directory_end() const; | |||
998 | base_reloc_iterator base_reloc_begin() const; | |||
999 | base_reloc_iterator base_reloc_end() const; | |||
1000 | const debug_directory *debug_directory_begin() const { | |||
1001 | return DebugDirectoryBegin; | |||
1002 | } | |||
1003 | const debug_directory *debug_directory_end() const { | |||
1004 | return DebugDirectoryEnd; | |||
1005 | } | |||
1006 | ||||
1007 | iterator_range<import_directory_iterator> import_directories() const; | |||
1008 | iterator_range<delay_import_directory_iterator> | |||
1009 | delay_import_directories() const; | |||
1010 | iterator_range<export_directory_iterator> export_directories() const; | |||
1011 | iterator_range<base_reloc_iterator> base_relocs() const; | |||
1012 | iterator_range<const debug_directory *> debug_directories() const { | |||
1013 | return make_range(debug_directory_begin(), debug_directory_end()); | |||
1014 | } | |||
1015 | ||||
1016 | const coff_tls_directory32 *getTLSDirectory32() const { | |||
1017 | return TLSDirectory32; | |||
1018 | } | |||
1019 | const coff_tls_directory64 *getTLSDirectory64() const { | |||
1020 | return TLSDirectory64; | |||
1021 | } | |||
1022 | ||||
1023 | const dos_header *getDOSHeader() const { | |||
1024 | if (!PE32Header && !PE32PlusHeader) | |||
1025 | return nullptr; | |||
1026 | return reinterpret_cast<const dos_header *>(base()); | |||
1027 | } | |||
1028 | ||||
1029 | const coff_file_header *getCOFFHeader() const { return COFFHeader; } | |||
1030 | const coff_bigobj_file_header *getCOFFBigObjHeader() const { | |||
1031 | return COFFBigObjHeader; | |||
1032 | } | |||
1033 | const pe32_header *getPE32Header() const { return PE32Header; } | |||
1034 | const pe32plus_header *getPE32PlusHeader() const { return PE32PlusHeader; } | |||
1035 | ||||
1036 | const data_directory *getDataDirectory(uint32_t index) const; | |||
1037 | Expected<const coff_section *> getSection(int32_t index) const; | |||
1038 | ||||
1039 | Expected<COFFSymbolRef> getSymbol(uint32_t index) const { | |||
1040 | if (index >= getNumberOfSymbols()) | |||
1041 | return errorCodeToError(object_error::parse_failed); | |||
1042 | if (SymbolTable16) | |||
1043 | return COFFSymbolRef(SymbolTable16 + index); | |||
1044 | if (SymbolTable32) | |||
1045 | return COFFSymbolRef(SymbolTable32 + index); | |||
1046 | return errorCodeToError(object_error::parse_failed); | |||
1047 | } | |||
1048 | ||||
1049 | template <typename T> | |||
1050 | Error getAuxSymbol(uint32_t index, const T *&Res) const { | |||
1051 | Expected<COFFSymbolRef> S = getSymbol(index); | |||
1052 | if (Error E = S.takeError()) | |||
1053 | return E; | |||
1054 | Res = reinterpret_cast<const T *>(S->getRawPtr()); | |||
1055 | return Error::success(); | |||
1056 | } | |||
1057 | ||||
1058 | Expected<StringRef> getSymbolName(COFFSymbolRef Symbol) const; | |||
1059 | Expected<StringRef> getSymbolName(const coff_symbol_generic *Symbol) const; | |||
1060 | ||||
1061 | ArrayRef<uint8_t> getSymbolAuxData(COFFSymbolRef Symbol) const; | |||
1062 | ||||
1063 | uint32_t getSymbolIndex(COFFSymbolRef Symbol) const; | |||
1064 | ||||
1065 | size_t getSymbolTableEntrySize() const { | |||
1066 | if (COFFHeader) | |||
1067 | return sizeof(coff_symbol16); | |||
1068 | if (COFFBigObjHeader) | |||
1069 | return sizeof(coff_symbol32); | |||
1070 | llvm_unreachable("null symbol table pointer!")__builtin_unreachable(); | |||
1071 | } | |||
1072 | ||||
1073 | ArrayRef<coff_relocation> getRelocations(const coff_section *Sec) const; | |||
1074 | ||||
1075 | Expected<StringRef> getSectionName(const coff_section *Sec) const; | |||
1076 | uint64_t getSectionSize(const coff_section *Sec) const; | |||
1077 | Error getSectionContents(const coff_section *Sec, | |||
1078 | ArrayRef<uint8_t> &Res) const; | |||
1079 | ||||
1080 | uint64_t getImageBase() const; | |||
1081 | Error getVaPtr(uint64_t VA, uintptr_t &Res) const; | |||
1082 | Error getRvaPtr(uint32_t Rva, uintptr_t &Res) const; | |||
1083 | ||||
1084 | /// Given an RVA base and size, returns a valid array of bytes or an error | |||
1085 | /// code if the RVA and size is not contained completely within a valid | |||
1086 | /// section. | |||
1087 | Error getRvaAndSizeAsBytes(uint32_t RVA, uint32_t Size, | |||
1088 | ArrayRef<uint8_t> &Contents) const; | |||
1089 | ||||
1090 | Error getHintName(uint32_t Rva, uint16_t &Hint, | |||
1091 | StringRef &Name) const; | |||
1092 | ||||
1093 | /// Get PDB information out of a codeview debug directory entry. | |||
1094 | Error getDebugPDBInfo(const debug_directory *DebugDir, | |||
1095 | const codeview::DebugInfo *&Info, | |||
1096 | StringRef &PDBFileName) const; | |||
1097 | ||||
1098 | /// Get PDB information from an executable. If the information is not present, | |||
1099 | /// Info will be set to nullptr and PDBFileName will be empty. An error is | |||
1100 | /// returned only on corrupt object files. Convenience accessor that can be | |||
1101 | /// used if the debug directory is not already handy. | |||
1102 | Error getDebugPDBInfo(const codeview::DebugInfo *&Info, | |||
1103 | StringRef &PDBFileName) const; | |||
1104 | ||||
1105 | bool isRelocatableObject() const override; | |||
1106 | bool is64() const { return PE32PlusHeader; } | |||
1107 | ||||
1108 | StringRef mapDebugSectionName(StringRef Name) const override; | |||
1109 | ||||
1110 | static bool classof(const Binary *v) { return v->isCOFF(); } | |||
1111 | }; | |||
1112 | ||||
1113 | // The iterator for the import directory table. | |||
1114 | class ImportDirectoryEntryRef { | |||
1115 | public: | |||
1116 | ImportDirectoryEntryRef() = default; | |||
1117 | ImportDirectoryEntryRef(const coff_import_directory_table_entry *Table, | |||
1118 | uint32_t I, const COFFObjectFile *Owner) | |||
1119 | : ImportTable(Table), Index(I), OwningObject(Owner) {} | |||
1120 | ||||
1121 | bool operator==(const ImportDirectoryEntryRef &Other) const; | |||
1122 | void moveNext(); | |||
1123 | ||||
1124 | imported_symbol_iterator imported_symbol_begin() const; | |||
1125 | imported_symbol_iterator imported_symbol_end() const; | |||
1126 | iterator_range<imported_symbol_iterator> imported_symbols() const; | |||
1127 | ||||
1128 | imported_symbol_iterator lookup_table_begin() const; | |||
1129 | imported_symbol_iterator lookup_table_end() const; | |||
1130 | iterator_range<imported_symbol_iterator> lookup_table_symbols() const; | |||
1131 | ||||
1132 | Error getName(StringRef &Result) const; | |||
1133 | Error getImportLookupTableRVA(uint32_t &Result) const; | |||
1134 | Error getImportAddressTableRVA(uint32_t &Result) const; | |||
1135 | ||||
1136 | Error | |||
1137 | getImportTableEntry(const coff_import_directory_table_entry *&Result) const; | |||
1138 | ||||
1139 | private: | |||
1140 | const coff_import_directory_table_entry *ImportTable; | |||
1141 | uint32_t Index; | |||
1142 | const COFFObjectFile *OwningObject = nullptr; | |||
1143 | }; | |||
1144 | ||||
1145 | class DelayImportDirectoryEntryRef { | |||
1146 | public: | |||
1147 | DelayImportDirectoryEntryRef() = default; | |||
1148 | DelayImportDirectoryEntryRef(const delay_import_directory_table_entry *T, | |||
1149 | uint32_t I, const COFFObjectFile *Owner) | |||
1150 | : Table(T), Index(I), OwningObject(Owner) {} | |||
1151 | ||||
1152 | bool operator==(const DelayImportDirectoryEntryRef &Other) const; | |||
1153 | void moveNext(); | |||
1154 | ||||
1155 | imported_symbol_iterator imported_symbol_begin() const; | |||
1156 | imported_symbol_iterator imported_symbol_end() const; | |||
1157 | iterator_range<imported_symbol_iterator> imported_symbols() const; | |||
1158 | ||||
1159 | Error getName(StringRef &Result) const; | |||
1160 | Error getDelayImportTable( | |||
1161 | const delay_import_directory_table_entry *&Result) const; | |||
1162 | Error getImportAddress(int AddrIndex, uint64_t &Result) const; | |||
1163 | ||||
1164 | private: | |||
1165 | const delay_import_directory_table_entry *Table; | |||
1166 | uint32_t Index; | |||
1167 | const COFFObjectFile *OwningObject = nullptr; | |||
1168 | }; | |||
1169 | ||||
1170 | // The iterator for the export directory table entry. | |||
1171 | class ExportDirectoryEntryRef { | |||
1172 | public: | |||
1173 | ExportDirectoryEntryRef() = default; | |||
1174 | ExportDirectoryEntryRef(const export_directory_table_entry *Table, uint32_t I, | |||
1175 | const COFFObjectFile *Owner) | |||
1176 | : ExportTable(Table), Index(I), OwningObject(Owner) {} | |||
1177 | ||||
1178 | bool operator==(const ExportDirectoryEntryRef &Other) const; | |||
1179 | void moveNext(); | |||
1180 | ||||
1181 | Error getDllName(StringRef &Result) const; | |||
1182 | Error getOrdinalBase(uint32_t &Result) const; | |||
1183 | Error getOrdinal(uint32_t &Result) const; | |||
1184 | Error getExportRVA(uint32_t &Result) const; | |||
1185 | Error getSymbolName(StringRef &Result) const; | |||
1186 | ||||
1187 | Error isForwarder(bool &Result) const; | |||
1188 | Error getForwardTo(StringRef &Result) const; | |||
1189 | ||||
1190 | private: | |||
1191 | const export_directory_table_entry *ExportTable; | |||
1192 | uint32_t Index; | |||
1193 | const COFFObjectFile *OwningObject = nullptr; | |||
1194 | }; | |||
1195 | ||||
1196 | class ImportedSymbolRef { | |||
1197 | public: | |||
1198 | ImportedSymbolRef() = default; | |||
1199 | ImportedSymbolRef(const import_lookup_table_entry32 *Entry, uint32_t I, | |||
1200 | const COFFObjectFile *Owner) | |||
1201 | : Entry32(Entry), Entry64(nullptr), Index(I), OwningObject(Owner) {} | |||
1202 | ImportedSymbolRef(const import_lookup_table_entry64 *Entry, uint32_t I, | |||
1203 | const COFFObjectFile *Owner) | |||
1204 | : Entry32(nullptr), Entry64(Entry), Index(I), OwningObject(Owner) {} | |||
1205 | ||||
1206 | bool operator==(const ImportedSymbolRef &Other) const; | |||
1207 | void moveNext(); | |||
1208 | ||||
1209 | Error getSymbolName(StringRef &Result) const; | |||
1210 | Error isOrdinal(bool &Result) const; | |||
1211 | Error getOrdinal(uint16_t &Result) const; | |||
1212 | Error getHintNameRVA(uint32_t &Result) const; | |||
1213 | ||||
1214 | private: | |||
1215 | const import_lookup_table_entry32 *Entry32; | |||
1216 | const import_lookup_table_entry64 *Entry64; | |||
1217 | uint32_t Index; | |||
1218 | const COFFObjectFile *OwningObject = nullptr; | |||
1219 | }; | |||
1220 | ||||
1221 | class BaseRelocRef { | |||
1222 | public: | |||
1223 | BaseRelocRef() = default; | |||
1224 | BaseRelocRef(const coff_base_reloc_block_header *Header, | |||
1225 | const COFFObjectFile *Owner) | |||
1226 | : Header(Header), Index(0) {} | |||
1227 | ||||
1228 | bool operator==(const BaseRelocRef &Other) const; | |||
1229 | void moveNext(); | |||
1230 | ||||
1231 | Error getType(uint8_t &Type) const; | |||
1232 | Error getRVA(uint32_t &Result) const; | |||
1233 | ||||
1234 | private: | |||
1235 | const coff_base_reloc_block_header *Header; | |||
1236 | uint32_t Index; | |||
1237 | }; | |||
1238 | ||||
1239 | class ResourceSectionRef { | |||
1240 | public: | |||
1241 | ResourceSectionRef() = default; | |||
1242 | explicit ResourceSectionRef(StringRef Ref) : BBS(Ref, support::little) {} | |||
1243 | ||||
1244 | Error load(const COFFObjectFile *O); | |||
1245 | Error load(const COFFObjectFile *O, const SectionRef &S); | |||
1246 | ||||
1247 | Expected<ArrayRef<UTF16>> | |||
1248 | getEntryNameString(const coff_resource_dir_entry &Entry); | |||
1249 | Expected<const coff_resource_dir_table &> | |||
1250 | getEntrySubDir(const coff_resource_dir_entry &Entry); | |||
1251 | Expected<const coff_resource_data_entry &> | |||
1252 | getEntryData(const coff_resource_dir_entry &Entry); | |||
1253 | Expected<const coff_resource_dir_table &> getBaseTable(); | |||
1254 | Expected<const coff_resource_dir_entry &> | |||
1255 | getTableEntry(const coff_resource_dir_table &Table, uint32_t Index); | |||
1256 | ||||
1257 | Expected<StringRef> getContents(const coff_resource_data_entry &Entry); | |||
1258 | ||||
1259 | private: | |||
1260 | BinaryByteStream BBS; | |||
1261 | ||||
1262 | SectionRef Section; | |||
1263 | const COFFObjectFile *Obj; | |||
1264 | ||||
1265 | std::vector<const coff_relocation *> Relocs; | |||
1266 | ||||
1267 | Expected<const coff_resource_dir_table &> getTableAtOffset(uint32_t Offset); | |||
1268 | Expected<const coff_resource_dir_entry &> | |||
1269 | getTableEntryAtOffset(uint32_t Offset); | |||
1270 | Expected<const coff_resource_data_entry &> | |||
1271 | getDataEntryAtOffset(uint32_t Offset); | |||
1272 | Expected<ArrayRef<UTF16>> getDirStringAtOffset(uint32_t Offset); | |||
1273 | }; | |||
1274 | ||||
1275 | // Corresponds to `_FPO_DATA` structure in the PE/COFF spec. | |||
1276 | struct FpoData { | |||
1277 | support::ulittle32_t Offset; // ulOffStart: Offset 1st byte of function code | |||
1278 | support::ulittle32_t Size; // cbProcSize: # bytes in function | |||
1279 | support::ulittle32_t NumLocals; // cdwLocals: # bytes in locals/4 | |||
1280 | support::ulittle16_t NumParams; // cdwParams: # bytes in params/4 | |||
1281 | support::ulittle16_t Attributes; | |||
1282 | ||||
1283 | // cbProlog: # bytes in prolog | |||
1284 | int getPrologSize() const { return Attributes & 0xF; } | |||
1285 | ||||
1286 | // cbRegs: # regs saved | |||
1287 | int getNumSavedRegs() const { return (Attributes >> 8) & 0x7; } | |||
1288 | ||||
1289 | // fHasSEH: true if seh is func | |||
1290 | bool hasSEH() const { return (Attributes >> 9) & 1; } | |||
1291 | ||||
1292 | // fUseBP: true if EBP has been allocated | |||
1293 | bool useBP() const { return (Attributes >> 10) & 1; } | |||
1294 | ||||
1295 | // cbFrame: frame pointer | |||
1296 | frame_type getFP() const { return static_cast<frame_type>(Attributes >> 14); } | |||
1297 | }; | |||
1298 | ||||
1299 | } // end namespace object | |||
1300 | ||||
1301 | } // end namespace llvm | |||
1302 | ||||
1303 | #endif // LLVM_OBJECT_COFF_H |