1 //===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the ELFObjectFile class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/ADT/Triple.h"
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/Object/ObjectFile.h"
19 #include "llvm/Support/ELF.h"
20 #include "llvm/Support/Endian.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/Support/MemoryBuffer.h"
23 #include "llvm/Support/raw_ostream.h"
29 using namespace object;
31 // Templates to choose Elf_Addr and Elf_Off depending on is64Bits.
33 template<support::endianness target_endianness>
34 struct ELFDataTypeTypedefHelperCommon {
35 typedef support::detail::packed_endian_specific_integral
36 <uint16_t, target_endianness, support::aligned> Elf_Half;
37 typedef support::detail::packed_endian_specific_integral
38 <uint32_t, target_endianness, support::aligned> Elf_Word;
39 typedef support::detail::packed_endian_specific_integral
40 <int32_t, target_endianness, support::aligned> Elf_Sword;
41 typedef support::detail::packed_endian_specific_integral
42 <uint64_t, target_endianness, support::aligned> Elf_Xword;
43 typedef support::detail::packed_endian_specific_integral
44 <int64_t, target_endianness, support::aligned> Elf_Sxword;
49 template<support::endianness target_endianness, bool is64Bits>
50 struct ELFDataTypeTypedefHelper;
53 template<support::endianness target_endianness>
54 struct ELFDataTypeTypedefHelper<target_endianness, false>
55 : ELFDataTypeTypedefHelperCommon<target_endianness> {
56 typedef support::detail::packed_endian_specific_integral
57 <uint32_t, target_endianness, support::aligned> Elf_Addr;
58 typedef support::detail::packed_endian_specific_integral
59 <uint32_t, target_endianness, support::aligned> Elf_Off;
63 template<support::endianness target_endianness>
64 struct ELFDataTypeTypedefHelper<target_endianness, true>
65 : ELFDataTypeTypedefHelperCommon<target_endianness>{
66 typedef support::detail::packed_endian_specific_integral
67 <uint64_t, target_endianness, support::aligned> Elf_Addr;
68 typedef support::detail::packed_endian_specific_integral
69 <uint64_t, target_endianness, support::aligned> Elf_Off;
73 // I really don't like doing this, but the alternative is copypasta.
74 #define LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits) \
76 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Addr Elf_Addr; \
78 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Off Elf_Off; \
80 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Half Elf_Half; \
82 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Word Elf_Word; \
84 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sword Elf_Sword; \
86 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Xword Elf_Xword; \
88 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sxword Elf_Sxword;
92 template<support::endianness target_endianness, bool is64Bits>
95 template<support::endianness target_endianness>
96 struct Elf_Shdr_Base<target_endianness, false> {
97 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
98 Elf_Word sh_name; // Section name (index into string table)
99 Elf_Word sh_type; // Section type (SHT_*)
100 Elf_Word sh_flags; // Section flags (SHF_*)
101 Elf_Addr sh_addr; // Address where section is to be loaded
102 Elf_Off sh_offset; // File offset of section data, in bytes
103 Elf_Word sh_size; // Size of section, in bytes
104 Elf_Word sh_link; // Section type-specific header table index link
105 Elf_Word sh_info; // Section type-specific extra information
106 Elf_Word sh_addralign;// Section address alignment
107 Elf_Word sh_entsize; // Size of records contained within the section
110 template<support::endianness target_endianness>
111 struct Elf_Shdr_Base<target_endianness, true> {
112 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
113 Elf_Word sh_name; // Section name (index into string table)
114 Elf_Word sh_type; // Section type (SHT_*)
115 Elf_Xword sh_flags; // Section flags (SHF_*)
116 Elf_Addr sh_addr; // Address where section is to be loaded
117 Elf_Off sh_offset; // File offset of section data, in bytes
118 Elf_Xword sh_size; // Size of section, in bytes
119 Elf_Word sh_link; // Section type-specific header table index link
120 Elf_Word sh_info; // Section type-specific extra information
121 Elf_Xword sh_addralign;// Section address alignment
122 Elf_Xword sh_entsize; // Size of records contained within the section
125 template<support::endianness target_endianness, bool is64Bits>
126 struct Elf_Shdr_Impl : Elf_Shdr_Base<target_endianness, is64Bits> {
127 using Elf_Shdr_Base<target_endianness, is64Bits>::sh_entsize;
128 using Elf_Shdr_Base<target_endianness, is64Bits>::sh_size;
130 /// @brief Get the number of entities this section contains if it has any.
131 unsigned getEntityCount() const {
134 return sh_size / sh_entsize;
140 template<support::endianness target_endianness, bool is64Bits>
143 template<support::endianness target_endianness>
144 struct Elf_Sym_Base<target_endianness, false> {
145 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
146 Elf_Word st_name; // Symbol name (index into string table)
147 Elf_Addr st_value; // Value or address associated with the symbol
148 Elf_Word st_size; // Size of the symbol
149 unsigned char st_info; // Symbol's type and binding attributes
150 unsigned char st_other; // Must be zero; reserved
151 Elf_Half st_shndx; // Which section (header table index) it's defined in
154 template<support::endianness target_endianness>
155 struct Elf_Sym_Base<target_endianness, true> {
156 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
157 Elf_Word st_name; // Symbol name (index into string table)
158 unsigned char st_info; // Symbol's type and binding attributes
159 unsigned char st_other; // Must be zero; reserved
160 Elf_Half st_shndx; // Which section (header table index) it's defined in
161 Elf_Addr st_value; // Value or address associated with the symbol
162 Elf_Xword st_size; // Size of the symbol
165 template<support::endianness target_endianness, bool is64Bits>
166 struct Elf_Sym_Impl : Elf_Sym_Base<target_endianness, is64Bits> {
167 using Elf_Sym_Base<target_endianness, is64Bits>::st_info;
169 // These accessors and mutators correspond to the ELF32_ST_BIND,
170 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
171 unsigned char getBinding() const { return st_info >> 4; }
172 unsigned char getType() const { return st_info & 0x0f; }
173 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
174 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
175 void setBindingAndType(unsigned char b, unsigned char t) {
176 st_info = (b << 4) + (t & 0x0f);
182 template<support::endianness target_endianness, bool is64Bits, bool isRela>
185 template<support::endianness target_endianness>
186 struct Elf_Rel_Base<target_endianness, false, false> {
187 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
188 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
189 Elf_Word r_info; // Symbol table index and type of relocation to apply
192 template<support::endianness target_endianness>
193 struct Elf_Rel_Base<target_endianness, true, false> {
194 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
195 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
196 Elf_Xword r_info; // Symbol table index and type of relocation to apply
199 template<support::endianness target_endianness>
200 struct Elf_Rel_Base<target_endianness, false, true> {
201 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
202 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
203 Elf_Word r_info; // Symbol table index and type of relocation to apply
204 Elf_Sword r_addend; // Compute value for relocatable field by adding this
207 template<support::endianness target_endianness>
208 struct Elf_Rel_Base<target_endianness, true, true> {
209 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
210 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
211 Elf_Xword r_info; // Symbol table index and type of relocation to apply
212 Elf_Sxword r_addend; // Compute value for relocatable field by adding this.
215 template<support::endianness target_endianness, bool is64Bits, bool isRela>
218 template<support::endianness target_endianness, bool isRela>
219 struct Elf_Rel_Impl<target_endianness, true, isRela>
220 : Elf_Rel_Base<target_endianness, true, isRela> {
221 using Elf_Rel_Base<target_endianness, true, isRela>::r_info;
222 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
224 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
225 // and ELF64_R_INFO macros defined in the ELF specification:
226 uint64_t getSymbol() const { return (r_info >> 32); }
227 unsigned char getType() const {
228 return (unsigned char) (r_info & 0xffffffffL);
230 void setSymbol(uint64_t s) { setSymbolAndType(s, getType()); }
231 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
232 void setSymbolAndType(uint64_t s, unsigned char t) {
233 r_info = (s << 32) + (t&0xffffffffL);
237 template<support::endianness target_endianness, bool isRela>
238 struct Elf_Rel_Impl<target_endianness, false, isRela>
239 : Elf_Rel_Base<target_endianness, false, isRela> {
240 using Elf_Rel_Base<target_endianness, false, isRela>::r_info;
241 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
243 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
244 // and ELF32_R_INFO macros defined in the ELF specification:
245 uint32_t getSymbol() const { return (r_info >> 8); }
246 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
247 void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); }
248 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
249 void setSymbolAndType(uint32_t s, unsigned char t) {
250 r_info = (s << 8) + t;
257 template<support::endianness target_endianness, bool is64Bits>
258 class ELFObjectFile : public ObjectFile {
259 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
261 typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
262 typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
263 typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
264 typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
267 unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
268 Elf_Half e_type; // Type of file (see ET_*)
269 Elf_Half e_machine; // Required architecture for this file (see EM_*)
270 Elf_Word e_version; // Must be equal to 1
271 Elf_Addr e_entry; // Address to jump to in order to start program
272 Elf_Off e_phoff; // Program header table's file offset, in bytes
273 Elf_Off e_shoff; // Section header table's file offset, in bytes
274 Elf_Word e_flags; // Processor-specific flags
275 Elf_Half e_ehsize; // Size of ELF header, in bytes
276 Elf_Half e_phentsize;// Size of an entry in the program header table
277 Elf_Half e_phnum; // Number of entries in the program header table
278 Elf_Half e_shentsize;// Size of an entry in the section header table
279 Elf_Half e_shnum; // Number of entries in the section header table
280 Elf_Half e_shstrndx; // Section header table index of section name
282 bool checkMagic() const {
283 return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
285 unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
286 unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
289 typedef SmallVector<const Elf_Shdr*, 1> Sections_t;
290 typedef DenseMap<unsigned, unsigned> IndexMap_t;
291 typedef DenseMap<const Elf_Shdr*, SmallVector<uint32_t, 1> > RelocMap_t;
293 const Elf_Ehdr *Header;
294 const Elf_Shdr *SectionHeaderTable;
295 const Elf_Shdr *dot_shstrtab_sec; // Section header string table.
296 const Elf_Shdr *dot_strtab_sec; // Symbol header string table.
297 Sections_t SymbolTableSections;
298 IndexMap_t SymbolTableSectionsIndexMap;
300 /// @brief Map sections to an array of relocation sections that reference
301 /// them sorted by section index.
302 RelocMap_t SectionRelocMap;
304 /// @brief Get the relocation section that contains \a Rel.
305 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
306 return getSection(Rel.w.b);
309 void validateSymbol(DataRefImpl Symb) const;
310 bool isRelocationHasAddend(DataRefImpl Rel) const;
312 const T *getEntry(uint16_t Section, uint32_t Entry) const;
314 const T *getEntry(const Elf_Shdr *Section, uint32_t Entry) const;
315 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
316 const Elf_Shdr *getSection(DataRefImpl index) const;
317 const Elf_Shdr *getSection(uint32_t index) const;
318 const Elf_Rel *getRel(DataRefImpl Rel) const;
319 const Elf_Rela *getRela(DataRefImpl Rela) const;
320 const char *getString(uint32_t section, uint32_t offset) const;
321 const char *getString(const Elf_Shdr *section, uint32_t offset) const;
322 error_code getSymbolName(const Elf_Sym *Symb, StringRef &Res) const;
325 virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
326 virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
327 virtual error_code getSymbolOffset(DataRefImpl Symb, uint64_t &Res) const;
328 virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
329 virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
330 virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
331 virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const;
332 virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const;
333 virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::SymbolType &Res) const;
335 virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
336 virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
337 virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
338 virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
339 virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
340 virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
341 virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
342 virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
343 virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
344 virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
346 virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
347 virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;
349 virtual error_code getRelocationNext(DataRefImpl Rel,
350 RelocationRef &Res) const;
351 virtual error_code getRelocationAddress(DataRefImpl Rel,
352 uint64_t &Res) const;
353 virtual error_code getRelocationSymbol(DataRefImpl Rel,
354 SymbolRef &Res) const;
355 virtual error_code getRelocationType(DataRefImpl Rel,
356 uint32_t &Res) const;
357 virtual error_code getRelocationTypeName(DataRefImpl Rel,
358 SmallVectorImpl<char> &Result) const;
359 virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
361 virtual error_code getRelocationValueString(DataRefImpl Rel,
362 SmallVectorImpl<char> &Result) const;
365 ELFObjectFile(MemoryBuffer *Object, error_code &ec);
366 virtual symbol_iterator begin_symbols() const;
367 virtual symbol_iterator end_symbols() const;
368 virtual section_iterator begin_sections() const;
369 virtual section_iterator end_sections() const;
371 virtual uint8_t getBytesInAddress() const;
372 virtual StringRef getFileFormatName() const;
373 virtual unsigned getArch() const;
375 uint64_t getNumSections() const;
376 uint64_t getStringTableIndex() const;
380 template<support::endianness target_endianness, bool is64Bits>
381 void ELFObjectFile<target_endianness, is64Bits>
382 ::validateSymbol(DataRefImpl Symb) const {
383 const Elf_Sym *symb = getSymbol(Symb);
384 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
385 // FIXME: We really need to do proper error handling in the case of an invalid
386 // input file. Because we don't use exceptions, I think we'll just pass
387 // an error object around.
389 && SymbolTableSection
390 && symb >= (const Elf_Sym*)(base()
391 + SymbolTableSection->sh_offset)
392 && symb < (const Elf_Sym*)(base()
393 + SymbolTableSection->sh_offset
394 + SymbolTableSection->sh_size)))
395 // FIXME: Proper error handling.
396 report_fatal_error("Symb must point to a valid symbol!");
399 template<support::endianness target_endianness, bool is64Bits>
400 error_code ELFObjectFile<target_endianness, is64Bits>
401 ::getSymbolNext(DataRefImpl Symb,
402 SymbolRef &Result) const {
403 validateSymbol(Symb);
404 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
407 // Check to see if we are at the end of this symbol table.
408 if (Symb.d.a >= SymbolTableSection->getEntityCount()) {
409 // We are at the end. If there are other symbol tables, jump to them.
411 Symb.d.a = 1; // The 0th symbol in ELF is fake.
412 // Otherwise return the terminator.
413 if (Symb.d.b >= SymbolTableSections.size()) {
414 Symb.d.a = std::numeric_limits<uint32_t>::max();
415 Symb.d.b = std::numeric_limits<uint32_t>::max();
419 Result = SymbolRef(Symb, this);
420 return object_error::success;
423 template<support::endianness target_endianness, bool is64Bits>
424 error_code ELFObjectFile<target_endianness, is64Bits>
425 ::getSymbolName(DataRefImpl Symb,
426 StringRef &Result) const {
427 validateSymbol(Symb);
428 const Elf_Sym *symb = getSymbol(Symb);
429 return getSymbolName(symb, Result);
432 template<support::endianness target_endianness, bool is64Bits>
433 error_code ELFObjectFile<target_endianness, is64Bits>
434 ::getSymbolOffset(DataRefImpl Symb,
435 uint64_t &Result) const {
436 validateSymbol(Symb);
437 const Elf_Sym *symb = getSymbol(Symb);
438 const Elf_Shdr *Section;
439 switch (symb->st_shndx) {
440 case ELF::SHN_COMMON:
441 // Undefined symbols have no address yet.
443 Result = UnknownAddressOrSize;
444 return object_error::success;
446 Result = symb->st_value;
447 return object_error::success;
448 default: Section = getSection(symb->st_shndx);
451 switch (symb->getType()) {
452 case ELF::STT_SECTION:
453 Result = Section ? Section->sh_addr : UnknownAddressOrSize;
454 return object_error::success;
456 case ELF::STT_OBJECT:
457 case ELF::STT_NOTYPE:
458 Result = symb->st_value;
459 return object_error::success;
461 Result = UnknownAddressOrSize;
462 return object_error::success;
466 template<support::endianness target_endianness, bool is64Bits>
467 error_code ELFObjectFile<target_endianness, is64Bits>
468 ::getSymbolAddress(DataRefImpl Symb,
469 uint64_t &Result) const {
470 validateSymbol(Symb);
471 const Elf_Sym *symb = getSymbol(Symb);
472 const Elf_Shdr *Section;
473 switch (symb->st_shndx) {
474 case ELF::SHN_COMMON: // Fall through.
475 // Undefined symbols have no address yet.
477 Result = UnknownAddressOrSize;
478 return object_error::success;
480 Result = reinterpret_cast<uintptr_t>(base()+symb->st_value);
481 return object_error::success;
482 default: Section = getSection(symb->st_shndx);
484 const uint8_t* addr = base();
486 addr += Section->sh_offset;
487 switch (symb->getType()) {
488 case ELF::STT_SECTION:
489 Result = reinterpret_cast<uintptr_t>(addr);
490 return object_error::success;
491 case ELF::STT_FUNC: // Fall through.
492 case ELF::STT_OBJECT: // Fall through.
493 case ELF::STT_NOTYPE:
494 addr += symb->st_value;
495 Result = reinterpret_cast<uintptr_t>(addr);
496 return object_error::success;
498 Result = UnknownAddressOrSize;
499 return object_error::success;
503 template<support::endianness target_endianness, bool is64Bits>
504 error_code ELFObjectFile<target_endianness, is64Bits>
505 ::getSymbolSize(DataRefImpl Symb,
506 uint64_t &Result) const {
507 validateSymbol(Symb);
508 const Elf_Sym *symb = getSymbol(Symb);
509 if (symb->st_size == 0)
510 Result = UnknownAddressOrSize;
511 Result = symb->st_size;
512 return object_error::success;
515 template<support::endianness target_endianness, bool is64Bits>
516 error_code ELFObjectFile<target_endianness, is64Bits>
517 ::getSymbolNMTypeChar(DataRefImpl Symb,
518 char &Result) const {
519 validateSymbol(Symb);
520 const Elf_Sym *symb = getSymbol(Symb);
521 const Elf_Shdr *Section = getSection(symb->st_shndx);
526 switch (Section->sh_type) {
527 case ELF::SHT_PROGBITS:
528 case ELF::SHT_DYNAMIC:
529 switch (Section->sh_flags) {
530 case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
532 case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
535 case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
536 case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
540 case ELF::SHT_NOBITS: ret = 'b';
544 switch (symb->st_shndx) {
549 case ELF::SHN_ABS: ret = 'a'; break;
550 case ELF::SHN_COMMON: ret = 'c'; break;
553 switch (symb->getBinding()) {
554 case ELF::STB_GLOBAL: ret = ::toupper(ret); break;
556 if (symb->st_shndx == ELF::SHN_UNDEF)
559 if (symb->getType() == ELF::STT_OBJECT)
565 if (ret == '?' && symb->getType() == ELF::STT_SECTION) {
567 if (error_code ec = getSymbolName(Symb, name))
569 Result = StringSwitch<char>(name)
570 .StartsWith(".debug", 'N')
571 .StartsWith(".note", 'n')
573 return object_error::success;
577 return object_error::success;
580 template<support::endianness target_endianness, bool is64Bits>
581 error_code ELFObjectFile<target_endianness, is64Bits>
582 ::getSymbolType(DataRefImpl Symb,
583 SymbolRef::SymbolType &Result) const {
584 validateSymbol(Symb);
585 const Elf_Sym *symb = getSymbol(Symb);
587 if (symb->st_shndx == ELF::SHN_UNDEF) {
588 Result = SymbolRef::ST_External;
589 return object_error::success;
592 switch (symb->getType()) {
594 Result = SymbolRef::ST_Function;
596 case ELF::STT_OBJECT:
597 Result = SymbolRef::ST_Data;
600 Result = SymbolRef::ST_Other;
603 return object_error::success;
606 template<support::endianness target_endianness, bool is64Bits>
607 error_code ELFObjectFile<target_endianness, is64Bits>
608 ::isSymbolGlobal(DataRefImpl Symb,
609 bool &Result) const {
610 validateSymbol(Symb);
611 const Elf_Sym *symb = getSymbol(Symb);
613 Result = symb->getBinding() == ELF::STB_GLOBAL;
614 return object_error::success;
617 template<support::endianness target_endianness, bool is64Bits>
618 error_code ELFObjectFile<target_endianness, is64Bits>
619 ::isSymbolInternal(DataRefImpl Symb,
620 bool &Result) const {
621 validateSymbol(Symb);
622 const Elf_Sym *symb = getSymbol(Symb);
624 if ( symb->getType() == ELF::STT_FILE
625 || symb->getType() == ELF::STT_SECTION)
628 return object_error::success;
631 template<support::endianness target_endianness, bool is64Bits>
632 error_code ELFObjectFile<target_endianness, is64Bits>
633 ::getSectionNext(DataRefImpl Sec, SectionRef &Result) const {
634 const uint8_t *sec = reinterpret_cast<const uint8_t *>(Sec.p);
635 sec += Header->e_shentsize;
636 Sec.p = reinterpret_cast<intptr_t>(sec);
637 Result = SectionRef(Sec, this);
638 return object_error::success;
641 template<support::endianness target_endianness, bool is64Bits>
642 error_code ELFObjectFile<target_endianness, is64Bits>
643 ::getSectionName(DataRefImpl Sec,
644 StringRef &Result) const {
645 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
646 Result = StringRef(getString(dot_shstrtab_sec, sec->sh_name));
647 return object_error::success;
650 template<support::endianness target_endianness, bool is64Bits>
651 error_code ELFObjectFile<target_endianness, is64Bits>
652 ::getSectionAddress(DataRefImpl Sec,
653 uint64_t &Result) const {
654 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
655 Result = sec->sh_addr;
656 return object_error::success;
659 template<support::endianness target_endianness, bool is64Bits>
660 error_code ELFObjectFile<target_endianness, is64Bits>
661 ::getSectionSize(DataRefImpl Sec,
662 uint64_t &Result) const {
663 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
664 Result = sec->sh_size;
665 return object_error::success;
668 template<support::endianness target_endianness, bool is64Bits>
669 error_code ELFObjectFile<target_endianness, is64Bits>
670 ::getSectionContents(DataRefImpl Sec,
671 StringRef &Result) const {
672 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
673 const char *start = (const char*)base() + sec->sh_offset;
674 Result = StringRef(start, sec->sh_size);
675 return object_error::success;
678 template<support::endianness target_endianness, bool is64Bits>
679 error_code ELFObjectFile<target_endianness, is64Bits>
680 ::getSectionAlignment(DataRefImpl Sec,
681 uint64_t &Result) const {
682 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
683 Result = sec->sh_addralign;
684 return object_error::success;
687 template<support::endianness target_endianness, bool is64Bits>
688 error_code ELFObjectFile<target_endianness, is64Bits>
689 ::isSectionText(DataRefImpl Sec,
690 bool &Result) const {
691 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
692 if (sec->sh_flags & ELF::SHF_EXECINSTR)
696 return object_error::success;
699 template<support::endianness target_endianness, bool is64Bits>
700 error_code ELFObjectFile<target_endianness, is64Bits>
701 ::isSectionData(DataRefImpl Sec,
702 bool &Result) const {
703 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
704 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
705 && sec->sh_type == ELF::SHT_PROGBITS)
709 return object_error::success;
712 template<support::endianness target_endianness, bool is64Bits>
713 error_code ELFObjectFile<target_endianness, is64Bits>
714 ::isSectionBSS(DataRefImpl Sec,
715 bool &Result) const {
716 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
717 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
718 && sec->sh_type == ELF::SHT_NOBITS)
722 return object_error::success;
725 template<support::endianness target_endianness, bool is64Bits>
726 error_code ELFObjectFile<target_endianness, is64Bits>
727 ::sectionContainsSymbol(DataRefImpl Sec,
729 bool &Result) const {
730 // FIXME: Unimplemented.
732 return object_error::success;
735 template<support::endianness target_endianness, bool is64Bits>
736 relocation_iterator ELFObjectFile<target_endianness, is64Bits>
737 ::getSectionRelBegin(DataRefImpl Sec) const {
739 memset(&RelData, 0, sizeof(RelData));
740 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
741 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
742 if (sec != 0 && ittr != SectionRelocMap.end()) {
743 RelData.w.a = getSection(ittr->second[0])->sh_link;
744 RelData.w.b = ittr->second[0];
747 return relocation_iterator(RelocationRef(RelData, this));
750 template<support::endianness target_endianness, bool is64Bits>
751 relocation_iterator ELFObjectFile<target_endianness, is64Bits>
752 ::getSectionRelEnd(DataRefImpl Sec) const {
754 memset(&RelData, 0, sizeof(RelData));
755 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
756 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
757 if (sec != 0 && ittr != SectionRelocMap.end()) {
758 // Get the index of the last relocation section for this section.
759 std::size_t relocsecindex = ittr->second[ittr->second.size() - 1];
760 const Elf_Shdr *relocsec = getSection(relocsecindex);
761 RelData.w.a = relocsec->sh_link;
762 RelData.w.b = relocsecindex;
763 RelData.w.c = relocsec->sh_size / relocsec->sh_entsize;
765 return relocation_iterator(RelocationRef(RelData, this));
769 template<support::endianness target_endianness, bool is64Bits>
770 error_code ELFObjectFile<target_endianness, is64Bits>
771 ::getRelocationNext(DataRefImpl Rel,
772 RelocationRef &Result) const {
774 const Elf_Shdr *relocsec = getSection(Rel.w.b);
775 if (Rel.w.c >= (relocsec->sh_size / relocsec->sh_entsize)) {
776 // We have reached the end of the relocations for this section. See if there
777 // is another relocation section.
778 typename RelocMap_t::mapped_type relocseclist =
779 SectionRelocMap.lookup(getSection(Rel.w.a));
781 // Do a binary search for the current reloc section index (which must be
782 // present). Then get the next one.
783 typename RelocMap_t::mapped_type::const_iterator loc =
784 std::lower_bound(relocseclist.begin(), relocseclist.end(), Rel.w.b);
787 // If there is no next one, don't do anything. The ++Rel.w.c above sets Rel
788 // to the end iterator.
789 if (loc != relocseclist.end()) {
794 Result = RelocationRef(Rel, this);
795 return object_error::success;
798 template<support::endianness target_endianness, bool is64Bits>
799 error_code ELFObjectFile<target_endianness, is64Bits>
800 ::getRelocationSymbol(DataRefImpl Rel,
801 SymbolRef &Result) const {
803 const Elf_Shdr *sec = getSection(Rel.w.b);
804 switch (sec->sh_type) {
806 report_fatal_error("Invalid section type in Rel!");
807 case ELF::SHT_REL : {
808 symbolIdx = getRel(Rel)->getSymbol();
811 case ELF::SHT_RELA : {
812 symbolIdx = getRela(Rel)->getSymbol();
816 DataRefImpl SymbolData;
817 IndexMap_t::const_iterator it = SymbolTableSectionsIndexMap.find(sec->sh_link);
818 if (it == SymbolTableSectionsIndexMap.end())
819 report_fatal_error("Relocation symbol table not found!");
820 SymbolData.d.a = symbolIdx;
821 SymbolData.d.b = it->second;
822 Result = SymbolRef(SymbolData, this);
823 return object_error::success;
826 template<support::endianness target_endianness, bool is64Bits>
827 error_code ELFObjectFile<target_endianness, is64Bits>
828 ::getRelocationAddress(DataRefImpl Rel,
829 uint64_t &Result) const {
831 const Elf_Shdr *sec = getSection(Rel.w.b);
832 switch (sec->sh_type) {
834 report_fatal_error("Invalid section type in Rel!");
835 case ELF::SHT_REL : {
836 offset = getRel(Rel)->r_offset;
839 case ELF::SHT_RELA : {
840 offset = getRela(Rel)->r_offset;
846 return object_error::success;
849 template<support::endianness target_endianness, bool is64Bits>
850 error_code ELFObjectFile<target_endianness, is64Bits>
851 ::getRelocationType(DataRefImpl Rel,
852 uint32_t &Result) const {
853 const Elf_Shdr *sec = getSection(Rel.w.b);
854 switch (sec->sh_type) {
856 report_fatal_error("Invalid section type in Rel!");
857 case ELF::SHT_REL : {
858 Result = getRel(Rel)->getType();
861 case ELF::SHT_RELA : {
862 Result = getRela(Rel)->getType();
866 return object_error::success;
869 #define LLVM_ELF_SWITCH_RELOC_TYPE_NAME(enum) \
870 case ELF::enum: res = #enum; break;
872 template<support::endianness target_endianness, bool is64Bits>
873 error_code ELFObjectFile<target_endianness, is64Bits>
874 ::getRelocationTypeName(DataRefImpl Rel,
875 SmallVectorImpl<char> &Result) const {
876 const Elf_Shdr *sec = getSection(Rel.w.b);
879 switch (sec->sh_type) {
881 return object_error::parse_failed;
882 case ELF::SHT_REL : {
883 type = getRel(Rel)->getType();
886 case ELF::SHT_RELA : {
887 type = getRela(Rel)->getType();
891 switch (Header->e_machine) {
894 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_NONE);
895 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_64);
896 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC32);
897 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOT32);
898 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PLT32);
899 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_COPY);
900 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GLOB_DAT);
901 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_JUMP_SLOT);
902 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_RELATIVE);
903 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPCREL);
904 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32);
905 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32S);
906 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_16);
907 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC16);
908 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_8);
909 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC8);
910 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPMOD64);
911 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF64);
912 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF64);
913 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSGD);
914 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSLD);
915 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF32);
916 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTTPOFF);
917 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF32);
918 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC64);
919 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTOFF64);
920 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32);
921 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE32);
922 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE64);
923 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32_TLSDESC);
924 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC_CALL);
925 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC);
932 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_NONE);
933 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32);
934 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC32);
935 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOT32);
936 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PLT32);
937 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_COPY);
938 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GLOB_DAT);
939 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_JUMP_SLOT);
940 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_RELATIVE);
941 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTOFF);
942 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTPC);
943 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32PLT);
944 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF);
945 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE);
946 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTIE);
947 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE);
948 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD);
949 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM);
950 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_16);
951 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC16);
952 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_8);
953 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC8);
954 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_32);
955 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_PUSH);
956 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_CALL);
957 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_POP);
958 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_32);
959 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_PUSH);
960 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_CALL);
961 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_POP);
962 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDO_32);
963 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE_32);
964 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE_32);
965 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPMOD32);
966 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPOFF32);
967 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF32);
968 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTDESC);
969 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC_CALL);
970 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC);
971 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_IRELATIVE);
979 Result.append(res.begin(), res.end());
980 return object_error::success;
983 #undef LLVM_ELF_SWITCH_RELOC_TYPE_NAME
985 template<support::endianness target_endianness, bool is64Bits>
986 error_code ELFObjectFile<target_endianness, is64Bits>
987 ::getRelocationAdditionalInfo(DataRefImpl Rel,
988 int64_t &Result) const {
989 const Elf_Shdr *sec = getSection(Rel.w.b);
990 switch (sec->sh_type) {
992 report_fatal_error("Invalid section type in Rel!");
993 case ELF::SHT_REL : {
995 return object_error::success;
997 case ELF::SHT_RELA : {
998 Result = getRela(Rel)->r_addend;
999 return object_error::success;
1004 template<support::endianness target_endianness, bool is64Bits>
1005 error_code ELFObjectFile<target_endianness, is64Bits>
1006 ::getRelocationValueString(DataRefImpl Rel,
1007 SmallVectorImpl<char> &Result) const {
1008 const Elf_Shdr *sec = getSection(Rel.w.b);
1012 uint16_t symbol_index = 0;
1013 switch (sec->sh_type) {
1015 return object_error::parse_failed;
1016 case ELF::SHT_REL : {
1017 type = getRel(Rel)->getType();
1018 symbol_index = getRel(Rel)->getSymbol();
1019 // TODO: Read implicit addend from section data.
1022 case ELF::SHT_RELA : {
1023 type = getRela(Rel)->getType();
1024 symbol_index = getRela(Rel)->getSymbol();
1025 addend = getRela(Rel)->r_addend;
1029 const Elf_Sym *symb = getEntry<Elf_Sym>(sec->sh_link, symbol_index);
1031 if (error_code ec = getSymbolName(symb, symname))
1033 switch (Header->e_machine) {
1034 case ELF::EM_X86_64:
1036 case ELF::R_X86_64_32S:
1039 case ELF::R_X86_64_PC32: {
1041 raw_string_ostream fmt(fmtbuf);
1042 fmt << symname << (addend < 0 ? "" : "+") << addend << "-P";
1044 Result.append(fmtbuf.begin(), fmtbuf.end());
1055 Result.append(res.begin(), res.end());
1056 return object_error::success;
1059 template<support::endianness target_endianness, bool is64Bits>
1060 ELFObjectFile<target_endianness, is64Bits>::ELFObjectFile(MemoryBuffer *Object
1062 : ObjectFile(Binary::isELF, Object, ec)
1063 , SectionHeaderTable(0)
1064 , dot_shstrtab_sec(0)
1065 , dot_strtab_sec(0) {
1066 Header = reinterpret_cast<const Elf_Ehdr *>(base());
1068 if (Header->e_shoff == 0)
1071 SectionHeaderTable =
1072 reinterpret_cast<const Elf_Shdr *>(base() + Header->e_shoff);
1073 uint64_t SectionTableSize = getNumSections() * Header->e_shentsize;
1074 if (!( (const uint8_t *)SectionHeaderTable + SectionTableSize
1075 <= base() + Data->getBufferSize()))
1076 // FIXME: Proper error handling.
1077 report_fatal_error("Section table goes past end of file!");
1079 // To find the symbol tables we walk the section table to find SHT_SYMTAB.
1080 const Elf_Shdr* sh = reinterpret_cast<const Elf_Shdr*>(SectionHeaderTable);
1081 for (uint64_t i = 0, e = getNumSections(); i != e; ++i) {
1082 if (sh->sh_type == ELF::SHT_SYMTAB) {
1083 SymbolTableSectionsIndexMap[i] = SymbolTableSections.size();
1084 SymbolTableSections.push_back(sh);
1086 if (sh->sh_type == ELF::SHT_REL || sh->sh_type == ELF::SHT_RELA) {
1087 SectionRelocMap[getSection(sh->sh_link)].push_back(i);
1092 // Sort section relocation lists by index.
1093 for (typename RelocMap_t::iterator i = SectionRelocMap.begin(),
1094 e = SectionRelocMap.end(); i != e; ++i) {
1095 std::sort(i->second.begin(), i->second.end());
1098 // Get string table sections.
1099 dot_shstrtab_sec = getSection(getStringTableIndex());
1100 if (dot_shstrtab_sec) {
1101 // Verify that the last byte in the string table in a null.
1102 if (((const char*)base() + dot_shstrtab_sec->sh_offset)
1103 [dot_shstrtab_sec->sh_size - 1] != 0)
1104 // FIXME: Proper error handling.
1105 report_fatal_error("String table must end with a null terminator!");
1108 // Merge this into the above loop.
1109 for (const char *i = reinterpret_cast<const char *>(SectionHeaderTable),
1110 *e = i + getNumSections() * Header->e_shentsize;
1111 i != e; i += Header->e_shentsize) {
1112 const Elf_Shdr *sh = reinterpret_cast<const Elf_Shdr*>(i);
1113 if (sh->sh_type == ELF::SHT_STRTAB) {
1114 StringRef SectionName(getString(dot_shstrtab_sec, sh->sh_name));
1115 if (SectionName == ".strtab") {
1116 if (dot_strtab_sec != 0)
1117 // FIXME: Proper error handling.
1118 report_fatal_error("Already found section named .strtab!");
1119 dot_strtab_sec = sh;
1120 const char *dot_strtab = (const char*)base() + sh->sh_offset;
1121 if (dot_strtab[sh->sh_size - 1] != 0)
1122 // FIXME: Proper error handling.
1123 report_fatal_error("String table must end with a null terminator!");
1129 template<support::endianness target_endianness, bool is64Bits>
1130 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
1131 ::begin_symbols() const {
1132 DataRefImpl SymbolData;
1133 memset(&SymbolData, 0, sizeof(SymbolData));
1134 if (SymbolTableSections.size() == 0) {
1135 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
1136 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
1138 SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
1141 return symbol_iterator(SymbolRef(SymbolData, this));
1144 template<support::endianness target_endianness, bool is64Bits>
1145 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
1146 ::end_symbols() const {
1147 DataRefImpl SymbolData;
1148 memset(&SymbolData, 0, sizeof(SymbolData));
1149 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
1150 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
1151 return symbol_iterator(SymbolRef(SymbolData, this));
1154 template<support::endianness target_endianness, bool is64Bits>
1155 section_iterator ELFObjectFile<target_endianness, is64Bits>
1156 ::begin_sections() const {
1158 memset(&ret, 0, sizeof(DataRefImpl));
1159 ret.p = reinterpret_cast<intptr_t>(base() + Header->e_shoff);
1160 return section_iterator(SectionRef(ret, this));
1163 template<support::endianness target_endianness, bool is64Bits>
1164 section_iterator ELFObjectFile<target_endianness, is64Bits>
1165 ::end_sections() const {
1167 memset(&ret, 0, sizeof(DataRefImpl));
1168 ret.p = reinterpret_cast<intptr_t>(base()
1170 + (Header->e_shentsize*getNumSections()));
1171 return section_iterator(SectionRef(ret, this));
1174 template<support::endianness target_endianness, bool is64Bits>
1175 uint8_t ELFObjectFile<target_endianness, is64Bits>::getBytesInAddress() const {
1176 return is64Bits ? 8 : 4;
1179 template<support::endianness target_endianness, bool is64Bits>
1180 StringRef ELFObjectFile<target_endianness, is64Bits>
1181 ::getFileFormatName() const {
1182 switch(Header->e_ident[ELF::EI_CLASS]) {
1183 case ELF::ELFCLASS32:
1184 switch(Header->e_machine) {
1186 return "ELF32-i386";
1187 case ELF::EM_X86_64:
1188 return "ELF32-x86-64";
1192 return "ELF32-unknown";
1194 case ELF::ELFCLASS64:
1195 switch(Header->e_machine) {
1197 return "ELF64-i386";
1198 case ELF::EM_X86_64:
1199 return "ELF64-x86-64";
1201 return "ELF64-unknown";
1204 // FIXME: Proper error handling.
1205 report_fatal_error("Invalid ELFCLASS!");
1209 template<support::endianness target_endianness, bool is64Bits>
1210 unsigned ELFObjectFile<target_endianness, is64Bits>::getArch() const {
1211 switch(Header->e_machine) {
1214 case ELF::EM_X86_64:
1215 return Triple::x86_64;
1219 return Triple::UnknownArch;
1223 template<support::endianness target_endianness, bool is64Bits>
1224 uint64_t ELFObjectFile<target_endianness, is64Bits>::getNumSections() const {
1225 if (Header->e_shnum == ELF::SHN_UNDEF)
1226 return SectionHeaderTable->sh_size;
1227 return Header->e_shnum;
1230 template<support::endianness target_endianness, bool is64Bits>
1232 ELFObjectFile<target_endianness, is64Bits>::getStringTableIndex() const {
1233 if (Header->e_shnum == ELF::SHN_UNDEF) {
1234 if (Header->e_shstrndx == ELF::SHN_HIRESERVE)
1235 return SectionHeaderTable->sh_link;
1236 if (Header->e_shstrndx >= getNumSections())
1239 return Header->e_shstrndx;
1243 template<support::endianness target_endianness, bool is64Bits>
1244 template<typename T>
1246 ELFObjectFile<target_endianness, is64Bits>::getEntry(uint16_t Section,
1247 uint32_t Entry) const {
1248 return getEntry<T>(getSection(Section), Entry);
1251 template<support::endianness target_endianness, bool is64Bits>
1252 template<typename T>
1254 ELFObjectFile<target_endianness, is64Bits>::getEntry(const Elf_Shdr * Section,
1255 uint32_t Entry) const {
1256 return reinterpret_cast<const T *>(
1258 + Section->sh_offset
1259 + (Entry * Section->sh_entsize));
1262 template<support::endianness target_endianness, bool is64Bits>
1263 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
1264 ELFObjectFile<target_endianness, is64Bits>::getSymbol(DataRefImpl Symb) const {
1265 return getEntry<Elf_Sym>(SymbolTableSections[Symb.d.b], Symb.d.a);
1268 template<support::endianness target_endianness, bool is64Bits>
1269 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rel *
1270 ELFObjectFile<target_endianness, is64Bits>::getRel(DataRefImpl Rel) const {
1271 return getEntry<Elf_Rel>(Rel.w.b, Rel.w.c);
1274 template<support::endianness target_endianness, bool is64Bits>
1275 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rela *
1276 ELFObjectFile<target_endianness, is64Bits>::getRela(DataRefImpl Rela) const {
1277 return getEntry<Elf_Rela>(Rela.w.b, Rela.w.c);
1280 template<support::endianness target_endianness, bool is64Bits>
1281 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
1282 ELFObjectFile<target_endianness, is64Bits>::getSection(DataRefImpl Symb) const {
1283 const Elf_Shdr *sec = getSection(Symb.d.b);
1284 if (sec->sh_type != ELF::SHT_SYMTAB || sec->sh_type != ELF::SHT_DYNSYM)
1285 // FIXME: Proper error handling.
1286 report_fatal_error("Invalid symbol table section!");
1290 template<support::endianness target_endianness, bool is64Bits>
1291 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
1292 ELFObjectFile<target_endianness, is64Bits>::getSection(uint32_t index) const {
1295 if (!SectionHeaderTable || index >= getNumSections())
1296 // FIXME: Proper error handling.
1297 report_fatal_error("Invalid section index!");
1299 return reinterpret_cast<const Elf_Shdr *>(
1300 reinterpret_cast<const char *>(SectionHeaderTable)
1301 + (index * Header->e_shentsize));
1304 template<support::endianness target_endianness, bool is64Bits>
1305 const char *ELFObjectFile<target_endianness, is64Bits>
1306 ::getString(uint32_t section,
1307 ELF::Elf32_Word offset) const {
1308 return getString(getSection(section), offset);
1311 template<support::endianness target_endianness, bool is64Bits>
1312 const char *ELFObjectFile<target_endianness, is64Bits>
1313 ::getString(const Elf_Shdr *section,
1314 ELF::Elf32_Word offset) const {
1315 assert(section && section->sh_type == ELF::SHT_STRTAB && "Invalid section!");
1316 if (offset >= section->sh_size)
1317 // FIXME: Proper error handling.
1318 report_fatal_error("Symbol name offset outside of string table!");
1319 return (const char *)base() + section->sh_offset + offset;
1322 template<support::endianness target_endianness, bool is64Bits>
1323 error_code ELFObjectFile<target_endianness, is64Bits>
1324 ::getSymbolName(const Elf_Sym *symb,
1325 StringRef &Result) const {
1326 if (symb->st_name == 0) {
1327 const Elf_Shdr *section = getSection(symb->st_shndx);
1331 Result = getString(dot_shstrtab_sec, section->sh_name);
1332 return object_error::success;
1335 // Use the default symbol table name section.
1336 Result = getString(dot_strtab_sec, symb->st_name);
1337 return object_error::success;
1340 // EI_CLASS, EI_DATA.
1341 static std::pair<unsigned char, unsigned char>
1342 getElfArchType(MemoryBuffer *Object) {
1343 if (Object->getBufferSize() < ELF::EI_NIDENT)
1344 return std::make_pair((uint8_t)ELF::ELFCLASSNONE,(uint8_t)ELF::ELFDATANONE);
1345 return std::make_pair( (uint8_t)Object->getBufferStart()[ELF::EI_CLASS]
1346 , (uint8_t)Object->getBufferStart()[ELF::EI_DATA]);
1351 ObjectFile *ObjectFile::createELFObjectFile(MemoryBuffer *Object) {
1352 std::pair<unsigned char, unsigned char> Ident = getElfArchType(Object);
1354 if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
1355 return new ELFObjectFile<support::little, false>(Object, ec);
1356 else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
1357 return new ELFObjectFile<support::big, false>(Object, ec);
1358 else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB)
1359 return new ELFObjectFile<support::little, true>(Object, ec);
1360 else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
1361 return new ELFObjectFile<support::big, true>(Object, ec);
1362 // FIXME: Proper error handling.
1363 report_fatal_error("Not an ELF object file!");
1366 } // end namespace llvm