1 //===- ELF.h - 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 declares the ELFObjectFile template class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_OBJECT_ELF_H
15 #define LLVM_OBJECT_ELF_H
17 #include "llvm/ADT/SmallVector.h"
18 #include "llvm/ADT/StringSwitch.h"
19 #include "llvm/ADT/Triple.h"
20 #include "llvm/ADT/DenseMap.h"
21 #include "llvm/ADT/PointerIntPair.h"
22 #include "llvm/Object/ObjectFile.h"
23 #include "llvm/Support/Casting.h"
24 #include "llvm/Support/ELF.h"
25 #include "llvm/Support/Endian.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/Support/MemoryBuffer.h"
28 #include "llvm/Support/raw_ostream.h"
36 // Subclasses of ELFObjectFile may need this for template instantiation
37 inline std::pair<unsigned char, unsigned char>
38 getElfArchType(MemoryBuffer *Object) {
39 if (Object->getBufferSize() < ELF::EI_NIDENT)
40 return std::make_pair((uint8_t)ELF::ELFCLASSNONE,(uint8_t)ELF::ELFDATANONE);
41 return std::make_pair( (uint8_t)Object->getBufferStart()[ELF::EI_CLASS]
42 , (uint8_t)Object->getBufferStart()[ELF::EI_DATA]);
45 // Templates to choose Elf_Addr and Elf_Off depending on is64Bits.
46 template<support::endianness target_endianness>
47 struct ELFDataTypeTypedefHelperCommon {
48 typedef support::detail::packed_endian_specific_integral
49 <uint16_t, target_endianness, support::aligned> Elf_Half;
50 typedef support::detail::packed_endian_specific_integral
51 <uint32_t, target_endianness, support::aligned> Elf_Word;
52 typedef support::detail::packed_endian_specific_integral
53 <int32_t, target_endianness, support::aligned> Elf_Sword;
54 typedef support::detail::packed_endian_specific_integral
55 <uint64_t, target_endianness, support::aligned> Elf_Xword;
56 typedef support::detail::packed_endian_specific_integral
57 <int64_t, target_endianness, support::aligned> Elf_Sxword;
60 template<support::endianness target_endianness, bool is64Bits>
61 struct ELFDataTypeTypedefHelper;
64 template<support::endianness target_endianness>
65 struct ELFDataTypeTypedefHelper<target_endianness, false>
66 : ELFDataTypeTypedefHelperCommon<target_endianness> {
67 typedef uint32_t value_type;
68 typedef support::detail::packed_endian_specific_integral
69 <value_type, target_endianness, support::aligned> Elf_Addr;
70 typedef support::detail::packed_endian_specific_integral
71 <value_type, target_endianness, support::aligned> Elf_Off;
75 template<support::endianness target_endianness>
76 struct ELFDataTypeTypedefHelper<target_endianness, true>
77 : ELFDataTypeTypedefHelperCommon<target_endianness>{
78 typedef uint64_t value_type;
79 typedef support::detail::packed_endian_specific_integral
80 <value_type, target_endianness, support::aligned> Elf_Addr;
81 typedef support::detail::packed_endian_specific_integral
82 <value_type, target_endianness, support::aligned> Elf_Off;
85 // I really don't like doing this, but the alternative is copypasta.
86 #define LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits) \
88 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Addr Elf_Addr; \
90 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Off Elf_Off; \
92 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Half Elf_Half; \
94 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Word Elf_Word; \
96 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sword Elf_Sword; \
98 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Xword Elf_Xword; \
100 ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sxword Elf_Sxword;
103 template<support::endianness target_endianness, bool is64Bits>
104 struct Elf_Shdr_Base;
106 template<support::endianness target_endianness>
107 struct Elf_Shdr_Base<target_endianness, false> {
108 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
109 Elf_Word sh_name; // Section name (index into string table)
110 Elf_Word sh_type; // Section type (SHT_*)
111 Elf_Word sh_flags; // Section flags (SHF_*)
112 Elf_Addr sh_addr; // Address where section is to be loaded
113 Elf_Off sh_offset; // File offset of section data, in bytes
114 Elf_Word sh_size; // Size of section, in bytes
115 Elf_Word sh_link; // Section type-specific header table index link
116 Elf_Word sh_info; // Section type-specific extra information
117 Elf_Word sh_addralign;// Section address alignment
118 Elf_Word sh_entsize; // Size of records contained within the section
121 template<support::endianness target_endianness>
122 struct Elf_Shdr_Base<target_endianness, true> {
123 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
124 Elf_Word sh_name; // Section name (index into string table)
125 Elf_Word sh_type; // Section type (SHT_*)
126 Elf_Xword sh_flags; // Section flags (SHF_*)
127 Elf_Addr sh_addr; // Address where section is to be loaded
128 Elf_Off sh_offset; // File offset of section data, in bytes
129 Elf_Xword sh_size; // Size of section, in bytes
130 Elf_Word sh_link; // Section type-specific header table index link
131 Elf_Word sh_info; // Section type-specific extra information
132 Elf_Xword sh_addralign;// Section address alignment
133 Elf_Xword sh_entsize; // Size of records contained within the section
136 template<support::endianness target_endianness, bool is64Bits>
137 struct Elf_Shdr_Impl : Elf_Shdr_Base<target_endianness, is64Bits> {
138 using Elf_Shdr_Base<target_endianness, is64Bits>::sh_entsize;
139 using Elf_Shdr_Base<target_endianness, is64Bits>::sh_size;
141 /// @brief Get the number of entities this section contains if it has any.
142 unsigned getEntityCount() const {
145 return sh_size / sh_entsize;
149 template<support::endianness target_endianness, bool is64Bits>
152 template<support::endianness target_endianness>
153 struct Elf_Sym_Base<target_endianness, false> {
154 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
155 Elf_Word st_name; // Symbol name (index into string table)
156 Elf_Addr st_value; // Value or address associated with the symbol
157 Elf_Word st_size; // Size of the symbol
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
163 template<support::endianness target_endianness>
164 struct Elf_Sym_Base<target_endianness, true> {
165 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
166 Elf_Word st_name; // Symbol name (index into string table)
167 unsigned char st_info; // Symbol's type and binding attributes
168 unsigned char st_other; // Must be zero; reserved
169 Elf_Half st_shndx; // Which section (header table index) it's defined in
170 Elf_Addr st_value; // Value or address associated with the symbol
171 Elf_Xword st_size; // Size of the symbol
174 template<support::endianness target_endianness, bool is64Bits>
175 struct Elf_Sym_Impl : Elf_Sym_Base<target_endianness, is64Bits> {
176 using Elf_Sym_Base<target_endianness, is64Bits>::st_info;
178 // These accessors and mutators correspond to the ELF32_ST_BIND,
179 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
180 unsigned char getBinding() const { return st_info >> 4; }
181 unsigned char getType() const { return st_info & 0x0f; }
182 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
183 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
184 void setBindingAndType(unsigned char b, unsigned char t) {
185 st_info = (b << 4) + (t & 0x0f);
189 /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section
190 /// (.gnu.version). This structure is identical for ELF32 and ELF64.
191 template<support::endianness target_endianness, bool is64Bits>
192 struct Elf_Versym_Impl {
193 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
194 Elf_Half vs_index; // Version index with flags (e.g. VERSYM_HIDDEN)
197 template<support::endianness target_endianness, bool is64Bits>
198 struct Elf_Verdaux_Impl;
200 /// Elf_Verdef: This is the structure of entries in the SHT_GNU_verdef section
201 /// (.gnu.version_d). This structure is identical for ELF32 and ELF64.
202 template<support::endianness target_endianness, bool is64Bits>
203 struct Elf_Verdef_Impl {
204 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
205 typedef Elf_Verdaux_Impl<target_endianness, is64Bits> Elf_Verdaux;
206 Elf_Half vd_version; // Version of this structure (e.g. VER_DEF_CURRENT)
207 Elf_Half vd_flags; // Bitwise flags (VER_DEF_*)
208 Elf_Half vd_ndx; // Version index, used in .gnu.version entries
209 Elf_Half vd_cnt; // Number of Verdaux entries
210 Elf_Word vd_hash; // Hash of name
211 Elf_Word vd_aux; // Offset to the first Verdaux entry (in bytes)
212 Elf_Word vd_next; // Offset to the next Verdef entry (in bytes)
214 /// Get the first Verdaux entry for this Verdef.
215 const Elf_Verdaux *getAux() const {
216 return reinterpret_cast<const Elf_Verdaux*>((const char*)this + vd_aux);
220 /// Elf_Verdaux: This is the structure of auxiliary data in the SHT_GNU_verdef
221 /// section (.gnu.version_d). This structure is identical for ELF32 and ELF64.
222 template<support::endianness target_endianness, bool is64Bits>
223 struct Elf_Verdaux_Impl {
224 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
225 Elf_Word vda_name; // Version name (offset in string table)
226 Elf_Word vda_next; // Offset to next Verdaux entry (in bytes)
229 /// Elf_Verneed: This is the structure of entries in the SHT_GNU_verneed
230 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
231 template<support::endianness target_endianness, bool is64Bits>
232 struct Elf_Verneed_Impl {
233 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
234 Elf_Half vn_version; // Version of this structure (e.g. VER_NEED_CURRENT)
235 Elf_Half vn_cnt; // Number of associated Vernaux entries
236 Elf_Word vn_file; // Library name (string table offset)
237 Elf_Word vn_aux; // Offset to first Vernaux entry (in bytes)
238 Elf_Word vn_next; // Offset to next Verneed entry (in bytes)
241 /// Elf_Vernaux: This is the structure of auxiliary data in SHT_GNU_verneed
242 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
243 template<support::endianness target_endianness, bool is64Bits>
244 struct Elf_Vernaux_Impl {
245 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
246 Elf_Word vna_hash; // Hash of dependency name
247 Elf_Half vna_flags; // Bitwise Flags (VER_FLAG_*)
248 Elf_Half vna_other; // Version index, used in .gnu.version entries
249 Elf_Word vna_name; // Dependency name
250 Elf_Word vna_next; // Offset to next Vernaux entry (in bytes)
253 /// Elf_Dyn_Base: This structure matches the form of entries in the dynamic
254 /// table section (.dynamic) look like.
255 template<support::endianness target_endianness, bool is64Bits>
258 template<support::endianness target_endianness>
259 struct Elf_Dyn_Base<target_endianness, false> {
260 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
268 template<support::endianness target_endianness>
269 struct Elf_Dyn_Base<target_endianness, true> {
270 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
278 /// Elf_Dyn_Impl: This inherits from Elf_Dyn_Base, adding getters and setters.
279 template<support::endianness target_endianness, bool is64Bits>
280 struct Elf_Dyn_Impl : Elf_Dyn_Base<target_endianness, is64Bits> {
281 using Elf_Dyn_Base<target_endianness, is64Bits>::d_tag;
282 using Elf_Dyn_Base<target_endianness, is64Bits>::d_un;
283 int64_t getTag() const { return d_tag; }
284 uint64_t getVal() const { return d_un.d_val; }
285 uint64_t getPtr() const { return d_un.ptr; }
288 template<support::endianness target_endianness, bool is64Bits>
291 // DynRefImpl: Reference to an entry in the dynamic table
292 // This is an ELF-specific interface.
293 template<support::endianness target_endianness, bool is64Bits>
295 typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
296 typedef ELFObjectFile<target_endianness, is64Bits> OwningType;
298 DataRefImpl DynPimpl;
299 const OwningType *OwningObject;
302 DynRefImpl() : OwningObject(NULL) { }
304 DynRefImpl(DataRefImpl DynP, const OwningType *Owner);
306 bool operator==(const DynRefImpl &Other) const;
307 bool operator <(const DynRefImpl &Other) const;
309 error_code getNext(DynRefImpl &Result) const;
310 int64_t getTag() const;
311 uint64_t getVal() const;
312 uint64_t getPtr() const;
314 DataRefImpl getRawDataRefImpl() const;
317 // Elf_Rel: Elf Relocation
318 template<support::endianness target_endianness, bool is64Bits, bool isRela>
321 template<support::endianness target_endianness>
322 struct Elf_Rel_Base<target_endianness, false, false> {
323 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
324 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
325 Elf_Word r_info; // Symbol table index and type of relocation to apply
328 template<support::endianness target_endianness>
329 struct Elf_Rel_Base<target_endianness, true, false> {
330 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
331 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
332 Elf_Xword r_info; // Symbol table index and type of relocation to apply
335 template<support::endianness target_endianness>
336 struct Elf_Rel_Base<target_endianness, false, true> {
337 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
338 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
339 Elf_Word r_info; // Symbol table index and type of relocation to apply
340 Elf_Sword r_addend; // Compute value for relocatable field by adding this
343 template<support::endianness target_endianness>
344 struct Elf_Rel_Base<target_endianness, true, true> {
345 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
346 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
347 Elf_Xword r_info; // Symbol table index and type of relocation to apply
348 Elf_Sxword r_addend; // Compute value for relocatable field by adding this.
351 template<support::endianness target_endianness, bool is64Bits, bool isRela>
354 template<support::endianness target_endianness, bool isRela>
355 struct Elf_Rel_Impl<target_endianness, true, isRela>
356 : Elf_Rel_Base<target_endianness, true, isRela> {
357 using Elf_Rel_Base<target_endianness, true, isRela>::r_info;
358 LLVM_ELF_IMPORT_TYPES(target_endianness, true)
360 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
361 // and ELF64_R_INFO macros defined in the ELF specification:
362 uint64_t getSymbol() const { return (r_info >> 32); }
363 unsigned char getType() const {
364 return (unsigned char) (r_info & 0xffffffffL);
366 void setSymbol(uint64_t s) { setSymbolAndType(s, getType()); }
367 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
368 void setSymbolAndType(uint64_t s, unsigned char t) {
369 r_info = (s << 32) + (t&0xffffffffL);
373 template<support::endianness target_endianness, bool isRela>
374 struct Elf_Rel_Impl<target_endianness, false, isRela>
375 : Elf_Rel_Base<target_endianness, false, isRela> {
376 using Elf_Rel_Base<target_endianness, false, isRela>::r_info;
377 LLVM_ELF_IMPORT_TYPES(target_endianness, false)
379 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
380 // and ELF32_R_INFO macros defined in the ELF specification:
381 uint32_t getSymbol() const { return (r_info >> 8); }
382 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
383 void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); }
384 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
385 void setSymbolAndType(uint32_t s, unsigned char t) {
386 r_info = (s << 8) + t;
390 template<support::endianness target_endianness, bool is64Bits>
391 struct Elf_Ehdr_Impl {
392 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
393 unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
394 Elf_Half e_type; // Type of file (see ET_*)
395 Elf_Half e_machine; // Required architecture for this file (see EM_*)
396 Elf_Word e_version; // Must be equal to 1
397 Elf_Addr e_entry; // Address to jump to in order to start program
398 Elf_Off e_phoff; // Program header table's file offset, in bytes
399 Elf_Off e_shoff; // Section header table's file offset, in bytes
400 Elf_Word e_flags; // Processor-specific flags
401 Elf_Half e_ehsize; // Size of ELF header, in bytes
402 Elf_Half e_phentsize;// Size of an entry in the program header table
403 Elf_Half e_phnum; // Number of entries in the program header table
404 Elf_Half e_shentsize;// Size of an entry in the section header table
405 Elf_Half e_shnum; // Number of entries in the section header table
406 Elf_Half e_shstrndx; // Section header table index of section name
408 bool checkMagic() const {
409 return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
411 unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
412 unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
415 template<support::endianness target_endianness, bool is64Bits>
416 class ELFObjectFile : public ObjectFile {
417 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
419 typedef Elf_Ehdr_Impl<target_endianness, is64Bits> Elf_Ehdr;
420 typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
421 typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
422 typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
423 typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
424 typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
425 typedef Elf_Verdef_Impl<target_endianness, is64Bits> Elf_Verdef;
426 typedef Elf_Verdaux_Impl<target_endianness, is64Bits> Elf_Verdaux;
427 typedef Elf_Verneed_Impl<target_endianness, is64Bits> Elf_Verneed;
428 typedef Elf_Vernaux_Impl<target_endianness, is64Bits> Elf_Vernaux;
429 typedef Elf_Versym_Impl<target_endianness, is64Bits> Elf_Versym;
430 typedef DynRefImpl<target_endianness, is64Bits> DynRef;
431 typedef content_iterator<DynRef> dyn_iterator;
434 // This flag is used for classof, to distinguish ELFObjectFile from
435 // its subclass. If more subclasses will be created, this flag will
436 // have to become an enum.
437 bool isDyldELFObject;
440 typedef SmallVector<const Elf_Shdr*, 1> Sections_t;
441 typedef DenseMap<unsigned, unsigned> IndexMap_t;
442 typedef DenseMap<const Elf_Shdr*, SmallVector<uint32_t, 1> > RelocMap_t;
444 const Elf_Ehdr *Header;
445 const Elf_Shdr *SectionHeaderTable;
446 const Elf_Shdr *dot_shstrtab_sec; // Section header string table.
447 const Elf_Shdr *dot_strtab_sec; // Symbol header string table.
448 const Elf_Shdr *dot_dynstr_sec; // Dynamic symbol string table.
450 // SymbolTableSections[0] always points to the dynamic string table section
451 // header, or NULL if there is no dynamic string table.
452 Sections_t SymbolTableSections;
453 IndexMap_t SymbolTableSectionsIndexMap;
454 DenseMap<const Elf_Sym*, ELF::Elf64_Word> ExtendedSymbolTable;
456 const Elf_Shdr *dot_dynamic_sec; // .dynamic
457 const Elf_Shdr *dot_gnu_version_sec; // .gnu.version
458 const Elf_Shdr *dot_gnu_version_r_sec; // .gnu.version_r
459 const Elf_Shdr *dot_gnu_version_d_sec; // .gnu.version_d
461 // Pointer to SONAME entry in dynamic string table
462 // This is set the first time getLoadName is called.
463 mutable const char *dt_soname;
466 /// \brief Iterate over relocations in a .rel or .rela section.
467 template<class RelocT>
468 class ELFRelocationIterator {
470 typedef void difference_type;
471 typedef const RelocT value_type;
472 typedef std::forward_iterator_tag iterator_category;
473 typedef value_type &reference;
474 typedef value_type *pointer;
476 /// \brief Default construct iterator.
477 ELFRelocationIterator() : Section(0), Current(0) {}
478 ELFRelocationIterator(const Elf_Shdr *Sec, const char *Start)
482 reference operator *() {
483 assert(Current && "Attempted to dereference an invalid iterator!");
484 return *reinterpret_cast<const RelocT*>(Current);
487 pointer operator ->() {
488 assert(Current && "Attempted to dereference an invalid iterator!");
489 return reinterpret_cast<const RelocT*>(Current);
492 bool operator ==(const ELFRelocationIterator &Other) {
493 return Section == Other.Section && Current == Other.Current;
496 bool operator !=(const ELFRelocationIterator &Other) {
497 return !(*this == Other);
500 ELFRelocationIterator &operator ++(int) {
501 assert(Current && "Attempted to increment an invalid iterator!");
502 Current += Section->sh_entsize;
506 ELFRelocationIterator operator ++() {
507 ELFRelocationIterator Tmp = *this;
513 const Elf_Shdr *Section;
518 // Records for each version index the corresponding Verdef or Vernaux entry.
519 // This is filled the first time LoadVersionMap() is called.
520 class VersionMapEntry : public PointerIntPair<const void*, 1> {
522 // If the integer is 0, this is an Elf_Verdef*.
523 // If the integer is 1, this is an Elf_Vernaux*.
524 VersionMapEntry() : PointerIntPair<const void*, 1>(NULL, 0) { }
525 VersionMapEntry(const Elf_Verdef *verdef)
526 : PointerIntPair<const void*, 1>(verdef, 0) { }
527 VersionMapEntry(const Elf_Vernaux *vernaux)
528 : PointerIntPair<const void*, 1>(vernaux, 1) { }
529 bool isNull() const { return getPointer() == NULL; }
530 bool isVerdef() const { return !isNull() && getInt() == 0; }
531 bool isVernaux() const { return !isNull() && getInt() == 1; }
532 const Elf_Verdef *getVerdef() const {
533 return isVerdef() ? (const Elf_Verdef*)getPointer() : NULL;
535 const Elf_Vernaux *getVernaux() const {
536 return isVernaux() ? (const Elf_Vernaux*)getPointer() : NULL;
539 mutable SmallVector<VersionMapEntry, 16> VersionMap;
540 void LoadVersionDefs(const Elf_Shdr *sec) const;
541 void LoadVersionNeeds(const Elf_Shdr *ec) const;
542 void LoadVersionMap() const;
544 /// @brief Map sections to an array of relocation sections that reference
545 /// them sorted by section index.
546 RelocMap_t SectionRelocMap;
548 /// @brief Get the relocation section that contains \a Rel.
549 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
550 return getSection(Rel.w.b);
553 bool isRelocationHasAddend(DataRefImpl Rel) const;
555 const T *getEntry(uint16_t Section, uint32_t Entry) const;
557 const T *getEntry(const Elf_Shdr *Section, uint32_t Entry) const;
558 const Elf_Shdr *getSection(DataRefImpl index) const;
559 const Elf_Shdr *getSection(uint32_t index) const;
560 const Elf_Rel *getRel(DataRefImpl Rel) const;
561 const Elf_Rela *getRela(DataRefImpl Rela) const;
562 const char *getString(uint32_t section, uint32_t offset) const;
563 const char *getString(const Elf_Shdr *section, uint32_t offset) const;
564 error_code getSymbolVersion(const Elf_Shdr *section,
567 bool &IsDefault) const;
568 void VerifyStrTab(const Elf_Shdr *sh) const;
571 const Elf_Sym *getSymbol(DataRefImpl Symb) const; // FIXME: Should be private?
572 void validateSymbol(DataRefImpl Symb) const;
575 error_code getSymbolName(const Elf_Shdr *section,
577 StringRef &Res) const;
578 error_code getSectionName(const Elf_Shdr *section,
579 StringRef &Res) const;
580 const Elf_Dyn *getDyn(DataRefImpl DynData) const;
581 error_code getSymbolVersion(SymbolRef Symb, StringRef &Version,
582 bool &IsDefault) const;
584 virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
585 virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
586 virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
587 virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
588 virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
589 virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
590 virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
591 virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
592 virtual error_code getSymbolSection(DataRefImpl Symb,
593 section_iterator &Res) const;
595 friend class DynRefImpl<target_endianness, is64Bits>;
596 virtual error_code getDynNext(DataRefImpl DynData, DynRef &Result) const;
598 virtual error_code getLibraryNext(DataRefImpl Data, LibraryRef &Result) const;
599 virtual error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const;
601 virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
602 virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
603 virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
604 virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
605 virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
606 virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
607 virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
608 virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
609 virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
610 virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
612 virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
613 virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
614 virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
616 virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
617 virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;
619 virtual error_code getRelocationNext(DataRefImpl Rel,
620 RelocationRef &Res) const;
621 virtual error_code getRelocationAddress(DataRefImpl Rel,
622 uint64_t &Res) const;
623 virtual error_code getRelocationOffset(DataRefImpl Rel,
624 uint64_t &Res) const;
625 virtual error_code getRelocationSymbol(DataRefImpl Rel,
626 SymbolRef &Res) const;
627 virtual error_code getRelocationType(DataRefImpl Rel,
628 uint64_t &Res) const;
629 virtual error_code getRelocationTypeName(DataRefImpl Rel,
630 SmallVectorImpl<char> &Result) const;
631 virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
633 virtual error_code getRelocationValueString(DataRefImpl Rel,
634 SmallVectorImpl<char> &Result) const;
637 ELFObjectFile(MemoryBuffer *Object, error_code &ec);
638 virtual symbol_iterator begin_symbols() const;
639 virtual symbol_iterator end_symbols() const;
641 virtual symbol_iterator begin_dynamic_symbols() const;
642 virtual symbol_iterator end_dynamic_symbols() const;
644 virtual section_iterator begin_sections() const;
645 virtual section_iterator end_sections() const;
647 virtual library_iterator begin_libraries_needed() const;
648 virtual library_iterator end_libraries_needed() const;
650 virtual dyn_iterator begin_dynamic_table() const;
651 virtual dyn_iterator end_dynamic_table() const;
653 typedef ELFRelocationIterator<Elf_Rela> Elf_Rela_Iter;
654 typedef ELFRelocationIterator<Elf_Rel> Elf_Rel_Iter;
656 virtual Elf_Rela_Iter beginELFRela(const Elf_Shdr *sec) const {
657 return Elf_Rela_Iter(sec, (const char *)(base() + sec->sh_offset));
660 virtual Elf_Rela_Iter endELFRela(const Elf_Shdr *sec) const {
661 return Elf_Rela_Iter(sec, (const char *)
662 (base() + sec->sh_offset + sec->sh_size));
665 virtual Elf_Rel_Iter beginELFRel(const Elf_Shdr *sec) const {
666 return Elf_Rel_Iter(sec, (const char *)(base() + sec->sh_offset));
669 virtual Elf_Rel_Iter endELFRel(const Elf_Shdr *sec) const {
670 return Elf_Rel_Iter(sec, (const char *)
671 (base() + sec->sh_offset + sec->sh_size));
674 virtual uint8_t getBytesInAddress() const;
675 virtual StringRef getFileFormatName() const;
676 virtual StringRef getObjectType() const { return "ELF"; }
677 virtual unsigned getArch() const;
678 virtual StringRef getLoadName() const;
679 virtual error_code getSectionContents(const Elf_Shdr *sec,
680 StringRef &Res) const;
682 uint64_t getNumSections() const;
683 uint64_t getStringTableIndex() const;
684 ELF::Elf64_Word getSymbolTableIndex(const Elf_Sym *symb) const;
685 const Elf_Shdr *getSection(const Elf_Sym *symb) const;
686 const Elf_Shdr *getElfSection(section_iterator &It) const;
687 const Elf_Sym *getElfSymbol(symbol_iterator &It) const;
688 const Elf_Sym *getElfSymbol(uint32_t index) const;
690 // Methods for type inquiry through isa, cast, and dyn_cast
691 bool isDyldType() const { return isDyldELFObject; }
692 static inline bool classof(const Binary *v) {
693 return v->getType() == getELFType(target_endianness == support::little,
696 static inline bool classof(const ELFObjectFile *v) { return true; }
699 // Iterate through the version definitions, and place each Elf_Verdef
700 // in the VersionMap according to its index.
701 template<support::endianness target_endianness, bool is64Bits>
702 void ELFObjectFile<target_endianness, is64Bits>::
703 LoadVersionDefs(const Elf_Shdr *sec) const {
704 unsigned vd_size = sec->sh_size; // Size of section in bytes
705 unsigned vd_count = sec->sh_info; // Number of Verdef entries
706 const char *sec_start = (const char*)base() + sec->sh_offset;
707 const char *sec_end = sec_start + vd_size;
708 // The first Verdef entry is at the start of the section.
709 const char *p = sec_start;
710 for (unsigned i = 0; i < vd_count; i++) {
711 if (p + sizeof(Elf_Verdef) > sec_end)
712 report_fatal_error("Section ended unexpectedly while scanning "
713 "version definitions.");
714 const Elf_Verdef *vd = reinterpret_cast<const Elf_Verdef *>(p);
715 if (vd->vd_version != ELF::VER_DEF_CURRENT)
716 report_fatal_error("Unexpected verdef version");
717 size_t index = vd->vd_ndx & ELF::VERSYM_VERSION;
718 if (index >= VersionMap.size())
719 VersionMap.resize(index+1);
720 VersionMap[index] = VersionMapEntry(vd);
725 // Iterate through the versions needed section, and place each Elf_Vernaux
726 // in the VersionMap according to its index.
727 template<support::endianness target_endianness, bool is64Bits>
728 void ELFObjectFile<target_endianness, is64Bits>::
729 LoadVersionNeeds(const Elf_Shdr *sec) const {
730 unsigned vn_size = sec->sh_size; // Size of section in bytes
731 unsigned vn_count = sec->sh_info; // Number of Verneed entries
732 const char *sec_start = (const char*)base() + sec->sh_offset;
733 const char *sec_end = sec_start + vn_size;
734 // The first Verneed entry is at the start of the section.
735 const char *p = sec_start;
736 for (unsigned i = 0; i < vn_count; i++) {
737 if (p + sizeof(Elf_Verneed) > sec_end)
738 report_fatal_error("Section ended unexpectedly while scanning "
739 "version needed records.");
740 const Elf_Verneed *vn = reinterpret_cast<const Elf_Verneed *>(p);
741 if (vn->vn_version != ELF::VER_NEED_CURRENT)
742 report_fatal_error("Unexpected verneed version");
743 // Iterate through the Vernaux entries
744 const char *paux = p + vn->vn_aux;
745 for (unsigned j = 0; j < vn->vn_cnt; j++) {
746 if (paux + sizeof(Elf_Vernaux) > sec_end)
747 report_fatal_error("Section ended unexpected while scanning auxiliary "
748 "version needed records.");
749 const Elf_Vernaux *vna = reinterpret_cast<const Elf_Vernaux *>(paux);
750 size_t index = vna->vna_other & ELF::VERSYM_VERSION;
751 if (index >= VersionMap.size())
752 VersionMap.resize(index+1);
753 VersionMap[index] = VersionMapEntry(vna);
754 paux += vna->vna_next;
760 template<support::endianness target_endianness, bool is64Bits>
761 void ELFObjectFile<target_endianness, is64Bits>::LoadVersionMap() const {
762 // If there is no dynamic symtab or version table, there is nothing to do.
763 if (SymbolTableSections[0] == NULL || dot_gnu_version_sec == NULL)
766 // Has the VersionMap already been loaded?
767 if (VersionMap.size() > 0)
770 // The first two version indexes are reserved.
771 // Index 0 is LOCAL, index 1 is GLOBAL.
772 VersionMap.push_back(VersionMapEntry());
773 VersionMap.push_back(VersionMapEntry());
775 if (dot_gnu_version_d_sec)
776 LoadVersionDefs(dot_gnu_version_d_sec);
778 if (dot_gnu_version_r_sec)
779 LoadVersionNeeds(dot_gnu_version_r_sec);
782 template<support::endianness target_endianness, bool is64Bits>
783 void ELFObjectFile<target_endianness, is64Bits>
784 ::validateSymbol(DataRefImpl Symb) const {
785 const Elf_Sym *symb = getSymbol(Symb);
786 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
787 // FIXME: We really need to do proper error handling in the case of an invalid
788 // input file. Because we don't use exceptions, I think we'll just pass
789 // an error object around.
791 && SymbolTableSection
792 && symb >= (const Elf_Sym*)(base()
793 + SymbolTableSection->sh_offset)
794 && symb < (const Elf_Sym*)(base()
795 + SymbolTableSection->sh_offset
796 + SymbolTableSection->sh_size)))
797 // FIXME: Proper error handling.
798 report_fatal_error("Symb must point to a valid symbol!");
801 template<support::endianness target_endianness, bool is64Bits>
802 error_code ELFObjectFile<target_endianness, is64Bits>
803 ::getSymbolNext(DataRefImpl Symb,
804 SymbolRef &Result) const {
805 validateSymbol(Symb);
806 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
809 // Check to see if we are at the end of this symbol table.
810 if (Symb.d.a >= SymbolTableSection->getEntityCount()) {
811 // We are at the end. If there are other symbol tables, jump to them.
812 // If the symbol table is .dynsym, we are iterating dynamic symbols,
813 // and there is only one table of these.
816 Symb.d.a = 1; // The 0th symbol in ELF is fake.
818 // Otherwise return the terminator.
819 if (Symb.d.b == 0 || Symb.d.b >= SymbolTableSections.size()) {
820 Symb.d.a = std::numeric_limits<uint32_t>::max();
821 Symb.d.b = std::numeric_limits<uint32_t>::max();
825 Result = SymbolRef(Symb, this);
826 return object_error::success;
829 template<support::endianness target_endianness, bool is64Bits>
830 error_code ELFObjectFile<target_endianness, is64Bits>
831 ::getSymbolName(DataRefImpl Symb,
832 StringRef &Result) const {
833 validateSymbol(Symb);
834 const Elf_Sym *symb = getSymbol(Symb);
835 return getSymbolName(SymbolTableSections[Symb.d.b], symb, Result);
838 template<support::endianness target_endianness, bool is64Bits>
839 error_code ELFObjectFile<target_endianness, is64Bits>
840 ::getSymbolVersion(SymbolRef SymRef,
842 bool &IsDefault) const {
843 DataRefImpl Symb = SymRef.getRawDataRefImpl();
844 validateSymbol(Symb);
845 const Elf_Sym *symb = getSymbol(Symb);
846 return getSymbolVersion(SymbolTableSections[Symb.d.b], symb,
850 template<support::endianness target_endianness, bool is64Bits>
851 ELF::Elf64_Word ELFObjectFile<target_endianness, is64Bits>
852 ::getSymbolTableIndex(const Elf_Sym *symb) const {
853 if (symb->st_shndx == ELF::SHN_XINDEX)
854 return ExtendedSymbolTable.lookup(symb);
855 return symb->st_shndx;
858 template<support::endianness target_endianness, bool is64Bits>
859 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
860 ELFObjectFile<target_endianness, is64Bits>
861 ::getSection(const Elf_Sym *symb) const {
862 if (symb->st_shndx == ELF::SHN_XINDEX)
863 return getSection(ExtendedSymbolTable.lookup(symb));
864 if (symb->st_shndx >= ELF::SHN_LORESERVE)
866 return getSection(symb->st_shndx);
869 template<support::endianness target_endianness, bool is64Bits>
870 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
871 ELFObjectFile<target_endianness, is64Bits>
872 ::getElfSection(section_iterator &It) const {
873 llvm::object::DataRefImpl ShdrRef = It->getRawDataRefImpl();
874 return reinterpret_cast<const Elf_Shdr *>(ShdrRef.p);
877 template<support::endianness target_endianness, bool is64Bits>
878 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
879 ELFObjectFile<target_endianness, is64Bits>
880 ::getElfSymbol(symbol_iterator &It) const {
881 return getSymbol(It->getRawDataRefImpl());
884 template<support::endianness target_endianness, bool is64Bits>
885 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
886 ELFObjectFile<target_endianness, is64Bits>
887 ::getElfSymbol(uint32_t index) const {
888 DataRefImpl SymbolData;
889 SymbolData.d.a = index;
891 return getSymbol(SymbolData);
894 template<support::endianness target_endianness, bool is64Bits>
895 error_code ELFObjectFile<target_endianness, is64Bits>
896 ::getSymbolFileOffset(DataRefImpl Symb,
897 uint64_t &Result) const {
898 validateSymbol(Symb);
899 const Elf_Sym *symb = getSymbol(Symb);
900 const Elf_Shdr *Section;
901 switch (getSymbolTableIndex(symb)) {
902 case ELF::SHN_COMMON:
903 // Unintialized symbols have no offset in the object file
905 Result = UnknownAddressOrSize;
906 return object_error::success;
908 Result = symb->st_value;
909 return object_error::success;
910 default: Section = getSection(symb);
913 switch (symb->getType()) {
914 case ELF::STT_SECTION:
915 Result = Section ? Section->sh_addr : UnknownAddressOrSize;
916 return object_error::success;
918 case ELF::STT_OBJECT:
919 case ELF::STT_NOTYPE:
920 Result = symb->st_value +
921 (Section ? Section->sh_offset : 0);
922 return object_error::success;
924 Result = UnknownAddressOrSize;
925 return object_error::success;
929 template<support::endianness target_endianness, bool is64Bits>
930 error_code ELFObjectFile<target_endianness, is64Bits>
931 ::getSymbolAddress(DataRefImpl Symb,
932 uint64_t &Result) const {
933 validateSymbol(Symb);
934 const Elf_Sym *symb = getSymbol(Symb);
935 const Elf_Shdr *Section;
936 switch (getSymbolTableIndex(symb)) {
937 case ELF::SHN_COMMON:
939 Result = UnknownAddressOrSize;
940 return object_error::success;
942 Result = symb->st_value;
943 return object_error::success;
944 default: Section = getSection(symb);
947 switch (symb->getType()) {
948 case ELF::STT_SECTION:
949 Result = Section ? Section->sh_addr : UnknownAddressOrSize;
950 return object_error::success;
952 case ELF::STT_OBJECT:
953 case ELF::STT_NOTYPE:
954 Result = symb->st_value + (Section ? Section->sh_addr : 0);
955 return object_error::success;
957 Result = UnknownAddressOrSize;
958 return object_error::success;
962 template<support::endianness target_endianness, bool is64Bits>
963 error_code ELFObjectFile<target_endianness, is64Bits>
964 ::getSymbolSize(DataRefImpl Symb,
965 uint64_t &Result) const {
966 validateSymbol(Symb);
967 const Elf_Sym *symb = getSymbol(Symb);
968 if (symb->st_size == 0)
969 Result = UnknownAddressOrSize;
970 Result = symb->st_size;
971 return object_error::success;
974 template<support::endianness target_endianness, bool is64Bits>
975 error_code ELFObjectFile<target_endianness, is64Bits>
976 ::getSymbolNMTypeChar(DataRefImpl Symb,
977 char &Result) const {
978 validateSymbol(Symb);
979 const Elf_Sym *symb = getSymbol(Symb);
980 const Elf_Shdr *Section = getSection(symb);
985 switch (Section->sh_type) {
986 case ELF::SHT_PROGBITS:
987 case ELF::SHT_DYNAMIC:
988 switch (Section->sh_flags) {
989 case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
991 case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
994 case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
995 case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
999 case ELF::SHT_NOBITS: ret = 'b';
1003 switch (getSymbolTableIndex(symb)) {
1004 case ELF::SHN_UNDEF:
1008 case ELF::SHN_ABS: ret = 'a'; break;
1009 case ELF::SHN_COMMON: ret = 'c'; break;
1012 switch (symb->getBinding()) {
1013 case ELF::STB_GLOBAL: ret = ::toupper(ret); break;
1015 if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
1018 if (symb->getType() == ELF::STT_OBJECT)
1024 if (ret == '?' && symb->getType() == ELF::STT_SECTION) {
1026 if (error_code ec = getSymbolName(Symb, name))
1028 Result = StringSwitch<char>(name)
1029 .StartsWith(".debug", 'N')
1030 .StartsWith(".note", 'n')
1032 return object_error::success;
1036 return object_error::success;
1039 template<support::endianness target_endianness, bool is64Bits>
1040 error_code ELFObjectFile<target_endianness, is64Bits>
1041 ::getSymbolType(DataRefImpl Symb,
1042 SymbolRef::Type &Result) const {
1043 validateSymbol(Symb);
1044 const Elf_Sym *symb = getSymbol(Symb);
1046 switch (symb->getType()) {
1047 case ELF::STT_NOTYPE:
1048 Result = SymbolRef::ST_Unknown;
1050 case ELF::STT_SECTION:
1051 Result = SymbolRef::ST_Debug;
1054 Result = SymbolRef::ST_File;
1057 Result = SymbolRef::ST_Function;
1059 case ELF::STT_OBJECT:
1060 case ELF::STT_COMMON:
1062 Result = SymbolRef::ST_Data;
1065 Result = SymbolRef::ST_Other;
1068 return object_error::success;
1071 template<support::endianness target_endianness, bool is64Bits>
1072 error_code ELFObjectFile<target_endianness, is64Bits>
1073 ::getSymbolFlags(DataRefImpl Symb,
1074 uint32_t &Result) const {
1075 validateSymbol(Symb);
1076 const Elf_Sym *symb = getSymbol(Symb);
1078 Result = SymbolRef::SF_None;
1080 if (symb->getBinding() != ELF::STB_LOCAL)
1081 Result |= SymbolRef::SF_Global;
1083 if (symb->getBinding() == ELF::STB_WEAK)
1084 Result |= SymbolRef::SF_Weak;
1086 if (symb->st_shndx == ELF::SHN_ABS)
1087 Result |= SymbolRef::SF_Absolute;
1089 if (symb->getType() == ELF::STT_FILE ||
1090 symb->getType() == ELF::STT_SECTION)
1091 Result |= SymbolRef::SF_FormatSpecific;
1093 if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
1094 Result |= SymbolRef::SF_Undefined;
1096 if (symb->getType() == ELF::STT_COMMON ||
1097 getSymbolTableIndex(symb) == ELF::SHN_COMMON)
1098 Result |= SymbolRef::SF_Common;
1100 if (symb->getType() == ELF::STT_TLS)
1101 Result |= SymbolRef::SF_ThreadLocal;
1103 return object_error::success;
1106 template<support::endianness target_endianness, bool is64Bits>
1107 error_code ELFObjectFile<target_endianness, is64Bits>
1108 ::getSymbolSection(DataRefImpl Symb,
1109 section_iterator &Res) const {
1110 validateSymbol(Symb);
1111 const Elf_Sym *symb = getSymbol(Symb);
1112 const Elf_Shdr *sec = getSection(symb);
1114 Res = end_sections();
1117 Sec.p = reinterpret_cast<intptr_t>(sec);
1118 Res = section_iterator(SectionRef(Sec, this));
1120 return object_error::success;
1123 template<support::endianness target_endianness, bool is64Bits>
1124 error_code ELFObjectFile<target_endianness, is64Bits>
1125 ::getSectionNext(DataRefImpl Sec, SectionRef &Result) const {
1126 const uint8_t *sec = reinterpret_cast<const uint8_t *>(Sec.p);
1127 sec += Header->e_shentsize;
1128 Sec.p = reinterpret_cast<intptr_t>(sec);
1129 Result = SectionRef(Sec, this);
1130 return object_error::success;
1133 template<support::endianness target_endianness, bool is64Bits>
1134 error_code ELFObjectFile<target_endianness, is64Bits>
1135 ::getSectionName(DataRefImpl Sec,
1136 StringRef &Result) const {
1137 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1138 Result = StringRef(getString(dot_shstrtab_sec, sec->sh_name));
1139 return object_error::success;
1142 template<support::endianness target_endianness, bool is64Bits>
1143 error_code ELFObjectFile<target_endianness, is64Bits>
1144 ::getSectionAddress(DataRefImpl Sec,
1145 uint64_t &Result) const {
1146 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1147 Result = sec->sh_addr;
1148 return object_error::success;
1151 template<support::endianness target_endianness, bool is64Bits>
1152 error_code ELFObjectFile<target_endianness, is64Bits>
1153 ::getSectionSize(DataRefImpl Sec,
1154 uint64_t &Result) const {
1155 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1156 Result = sec->sh_size;
1157 return object_error::success;
1160 template<support::endianness target_endianness, bool is64Bits>
1161 error_code ELFObjectFile<target_endianness, is64Bits>
1162 ::getSectionContents(DataRefImpl Sec,
1163 StringRef &Result) const {
1164 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1165 const char *start = (const char*)base() + sec->sh_offset;
1166 Result = StringRef(start, sec->sh_size);
1167 return object_error::success;
1170 template<support::endianness target_endianness, bool is64Bits>
1171 error_code ELFObjectFile<target_endianness, is64Bits>
1172 ::getSectionContents(const Elf_Shdr *Sec,
1173 StringRef &Result) const {
1174 const char *start = (const char*)base() + Sec->sh_offset;
1175 Result = StringRef(start, Sec->sh_size);
1176 return object_error::success;
1179 template<support::endianness target_endianness, bool is64Bits>
1180 error_code ELFObjectFile<target_endianness, is64Bits>
1181 ::getSectionAlignment(DataRefImpl Sec,
1182 uint64_t &Result) const {
1183 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1184 Result = sec->sh_addralign;
1185 return object_error::success;
1188 template<support::endianness target_endianness, bool is64Bits>
1189 error_code ELFObjectFile<target_endianness, is64Bits>
1190 ::isSectionText(DataRefImpl Sec,
1191 bool &Result) const {
1192 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1193 if (sec->sh_flags & ELF::SHF_EXECINSTR)
1197 return object_error::success;
1200 template<support::endianness target_endianness, bool is64Bits>
1201 error_code ELFObjectFile<target_endianness, is64Bits>
1202 ::isSectionData(DataRefImpl Sec,
1203 bool &Result) const {
1204 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1205 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
1206 && sec->sh_type == ELF::SHT_PROGBITS)
1210 return object_error::success;
1213 template<support::endianness target_endianness, bool is64Bits>
1214 error_code ELFObjectFile<target_endianness, is64Bits>
1215 ::isSectionBSS(DataRefImpl Sec,
1216 bool &Result) const {
1217 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1218 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
1219 && sec->sh_type == ELF::SHT_NOBITS)
1223 return object_error::success;
1226 template<support::endianness target_endianness, bool is64Bits>
1227 error_code ELFObjectFile<target_endianness, is64Bits>
1228 ::isSectionRequiredForExecution(DataRefImpl Sec,
1229 bool &Result) const {
1230 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1231 if (sec->sh_flags & ELF::SHF_ALLOC)
1235 return object_error::success;
1238 template<support::endianness target_endianness, bool is64Bits>
1239 error_code ELFObjectFile<target_endianness, is64Bits>
1240 ::isSectionVirtual(DataRefImpl Sec,
1241 bool &Result) const {
1242 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1243 if (sec->sh_type == ELF::SHT_NOBITS)
1247 return object_error::success;
1250 template<support::endianness target_endianness, bool is64Bits>
1251 error_code ELFObjectFile<target_endianness, is64Bits>::isSectionZeroInit(DataRefImpl Sec,
1252 bool &Result) const {
1253 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1254 // For ELF, all zero-init sections are virtual (that is, they occupy no space
1255 // in the object image) and vice versa.
1256 if (sec->sh_flags & ELF::SHT_NOBITS)
1260 return object_error::success;
1263 template<support::endianness target_endianness, bool is64Bits>
1264 error_code ELFObjectFile<target_endianness, is64Bits>
1265 ::sectionContainsSymbol(DataRefImpl Sec,
1267 bool &Result) const {
1268 // FIXME: Unimplemented.
1270 return object_error::success;
1273 template<support::endianness target_endianness, bool is64Bits>
1274 relocation_iterator ELFObjectFile<target_endianness, is64Bits>
1275 ::getSectionRelBegin(DataRefImpl Sec) const {
1276 DataRefImpl RelData;
1277 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1278 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
1279 if (sec != 0 && ittr != SectionRelocMap.end()) {
1280 RelData.w.a = getSection(ittr->second[0])->sh_info;
1281 RelData.w.b = ittr->second[0];
1284 return relocation_iterator(RelocationRef(RelData, this));
1287 template<support::endianness target_endianness, bool is64Bits>
1288 relocation_iterator ELFObjectFile<target_endianness, is64Bits>
1289 ::getSectionRelEnd(DataRefImpl Sec) const {
1290 DataRefImpl RelData;
1291 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1292 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
1293 if (sec != 0 && ittr != SectionRelocMap.end()) {
1294 // Get the index of the last relocation section for this section.
1295 std::size_t relocsecindex = ittr->second[ittr->second.size() - 1];
1296 const Elf_Shdr *relocsec = getSection(relocsecindex);
1297 RelData.w.a = relocsec->sh_info;
1298 RelData.w.b = relocsecindex;
1299 RelData.w.c = relocsec->sh_size / relocsec->sh_entsize;
1301 return relocation_iterator(RelocationRef(RelData, this));
1305 template<support::endianness target_endianness, bool is64Bits>
1306 error_code ELFObjectFile<target_endianness, is64Bits>
1307 ::getRelocationNext(DataRefImpl Rel,
1308 RelocationRef &Result) const {
1310 const Elf_Shdr *relocsec = getSection(Rel.w.b);
1311 if (Rel.w.c >= (relocsec->sh_size / relocsec->sh_entsize)) {
1312 // We have reached the end of the relocations for this section. See if there
1313 // is another relocation section.
1314 typename RelocMap_t::mapped_type relocseclist =
1315 SectionRelocMap.lookup(getSection(Rel.w.a));
1317 // Do a binary search for the current reloc section index (which must be
1318 // present). Then get the next one.
1319 typename RelocMap_t::mapped_type::const_iterator loc =
1320 std::lower_bound(relocseclist.begin(), relocseclist.end(), Rel.w.b);
1323 // If there is no next one, don't do anything. The ++Rel.w.c above sets Rel
1324 // to the end iterator.
1325 if (loc != relocseclist.end()) {
1330 Result = RelocationRef(Rel, this);
1331 return object_error::success;
1334 template<support::endianness target_endianness, bool is64Bits>
1335 error_code ELFObjectFile<target_endianness, is64Bits>
1336 ::getRelocationSymbol(DataRefImpl Rel,
1337 SymbolRef &Result) const {
1339 const Elf_Shdr *sec = getSection(Rel.w.b);
1340 switch (sec->sh_type) {
1342 report_fatal_error("Invalid section type in Rel!");
1343 case ELF::SHT_REL : {
1344 symbolIdx = getRel(Rel)->getSymbol();
1347 case ELF::SHT_RELA : {
1348 symbolIdx = getRela(Rel)->getSymbol();
1352 DataRefImpl SymbolData;
1353 IndexMap_t::const_iterator it = SymbolTableSectionsIndexMap.find(sec->sh_link);
1354 if (it == SymbolTableSectionsIndexMap.end())
1355 report_fatal_error("Relocation symbol table not found!");
1356 SymbolData.d.a = symbolIdx;
1357 SymbolData.d.b = it->second;
1358 Result = SymbolRef(SymbolData, this);
1359 return object_error::success;
1362 template<support::endianness target_endianness, bool is64Bits>
1363 error_code ELFObjectFile<target_endianness, is64Bits>
1364 ::getRelocationAddress(DataRefImpl Rel,
1365 uint64_t &Result) const {
1367 const Elf_Shdr *sec = getSection(Rel.w.b);
1368 switch (sec->sh_type) {
1370 report_fatal_error("Invalid section type in Rel!");
1371 case ELF::SHT_REL : {
1372 offset = getRel(Rel)->r_offset;
1375 case ELF::SHT_RELA : {
1376 offset = getRela(Rel)->r_offset;
1382 return object_error::success;
1385 template<support::endianness target_endianness, bool is64Bits>
1386 error_code ELFObjectFile<target_endianness, is64Bits>
1387 ::getRelocationOffset(DataRefImpl Rel,
1388 uint64_t &Result) const {
1390 const Elf_Shdr *sec = getSection(Rel.w.b);
1391 switch (sec->sh_type) {
1393 report_fatal_error("Invalid section type in Rel!");
1394 case ELF::SHT_REL : {
1395 offset = getRel(Rel)->r_offset;
1398 case ELF::SHT_RELA : {
1399 offset = getRela(Rel)->r_offset;
1404 Result = offset - sec->sh_addr;
1405 return object_error::success;
1408 template<support::endianness target_endianness, bool is64Bits>
1409 error_code ELFObjectFile<target_endianness, is64Bits>
1410 ::getRelocationType(DataRefImpl Rel,
1411 uint64_t &Result) const {
1412 const Elf_Shdr *sec = getSection(Rel.w.b);
1413 switch (sec->sh_type) {
1415 report_fatal_error("Invalid section type in Rel!");
1416 case ELF::SHT_REL : {
1417 Result = getRel(Rel)->getType();
1420 case ELF::SHT_RELA : {
1421 Result = getRela(Rel)->getType();
1425 return object_error::success;
1428 #define LLVM_ELF_SWITCH_RELOC_TYPE_NAME(enum) \
1429 case ELF::enum: res = #enum; break;
1431 template<support::endianness target_endianness, bool is64Bits>
1432 error_code ELFObjectFile<target_endianness, is64Bits>
1433 ::getRelocationTypeName(DataRefImpl Rel,
1434 SmallVectorImpl<char> &Result) const {
1435 const Elf_Shdr *sec = getSection(Rel.w.b);
1438 switch (sec->sh_type) {
1440 return object_error::parse_failed;
1441 case ELF::SHT_REL : {
1442 type = getRel(Rel)->getType();
1445 case ELF::SHT_RELA : {
1446 type = getRela(Rel)->getType();
1450 switch (Header->e_machine) {
1451 case ELF::EM_X86_64:
1453 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_NONE);
1454 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_64);
1455 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC32);
1456 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOT32);
1457 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PLT32);
1458 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_COPY);
1459 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GLOB_DAT);
1460 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_JUMP_SLOT);
1461 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_RELATIVE);
1462 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPCREL);
1463 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32);
1464 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32S);
1465 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_16);
1466 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC16);
1467 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_8);
1468 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC8);
1469 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPMOD64);
1470 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF64);
1471 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF64);
1472 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSGD);
1473 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSLD);
1474 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF32);
1475 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTTPOFF);
1476 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF32);
1477 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC64);
1478 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTOFF64);
1479 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32);
1480 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE32);
1481 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE64);
1482 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32_TLSDESC);
1483 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC_CALL);
1484 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC);
1491 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_NONE);
1492 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32);
1493 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC32);
1494 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOT32);
1495 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PLT32);
1496 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_COPY);
1497 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GLOB_DAT);
1498 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_JUMP_SLOT);
1499 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_RELATIVE);
1500 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTOFF);
1501 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTPC);
1502 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32PLT);
1503 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF);
1504 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE);
1505 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTIE);
1506 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE);
1507 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD);
1508 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM);
1509 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_16);
1510 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC16);
1511 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_8);
1512 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC8);
1513 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_32);
1514 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_PUSH);
1515 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_CALL);
1516 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_POP);
1517 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_32);
1518 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_PUSH);
1519 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_CALL);
1520 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_POP);
1521 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDO_32);
1522 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE_32);
1523 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE_32);
1524 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPMOD32);
1525 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPOFF32);
1526 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF32);
1527 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTDESC);
1528 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC_CALL);
1529 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC);
1530 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_IRELATIVE);
1537 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_NONE);
1538 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PC24);
1539 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS32);
1540 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_REL32);
1541 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_PC_G0);
1542 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS16);
1543 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS12);
1544 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_ABS5);
1545 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS8);
1546 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_SBREL32);
1547 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_CALL);
1548 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_PC8);
1549 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_BREL_ADJ);
1550 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DESC);
1551 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_SWI8);
1552 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_XPC25);
1553 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_XPC22);
1554 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DTPMOD32);
1555 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DTPOFF32);
1556 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_TPOFF32);
1557 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_COPY);
1558 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GLOB_DAT);
1559 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_JUMP_SLOT);
1560 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_RELATIVE);
1561 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOTOFF32);
1562 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_BASE_PREL);
1563 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_BREL);
1564 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PLT32);
1565 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_CALL);
1566 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_JUMP24);
1567 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP24);
1568 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_BASE_ABS);
1569 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PCREL_7_0);
1570 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PCREL_15_8);
1571 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PCREL_23_15);
1572 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SBREL_11_0_NC);
1573 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SBREL_19_12_NC);
1574 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SBREL_27_20_CK);
1575 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TARGET1);
1576 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_SBREL31);
1577 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_V4BX);
1578 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TARGET2);
1579 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PREL31);
1580 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_ABS_NC);
1581 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVT_ABS);
1582 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_PREL_NC);
1583 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVT_PREL);
1584 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_ABS_NC);
1585 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVT_ABS);
1586 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_PREL_NC);
1587 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVT_PREL);
1588 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP19);
1589 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP6);
1590 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_ALU_PREL_11_0);
1591 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_PC12);
1592 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS32_NOI);
1593 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_REL32_NOI);
1594 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G0_NC);
1595 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G0);
1596 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G1_NC);
1597 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G1);
1598 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G2);
1599 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_PC_G1);
1600 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_PC_G2);
1601 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_PC_G0);
1602 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_PC_G1);
1603 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_PC_G2);
1604 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_PC_G0);
1605 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_PC_G1);
1606 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_PC_G2);
1607 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G0_NC);
1608 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G0);
1609 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G1_NC);
1610 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G1);
1611 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G2);
1612 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SB_G0);
1613 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SB_G1);
1614 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SB_G2);
1615 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_SB_G0);
1616 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_SB_G1);
1617 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_SB_G2);
1618 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_SB_G0);
1619 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_SB_G1);
1620 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_SB_G2);
1621 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_BREL_NC);
1622 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVT_BREL);
1623 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_BREL);
1624 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_BREL_NC);
1625 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVT_BREL);
1626 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_BREL);
1627 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_GOTDESC);
1628 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_CALL);
1629 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DESCSEQ);
1630 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_TLS_CALL);
1631 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PLT32_ABS);
1632 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_ABS);
1633 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_PREL);
1634 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_BREL12);
1635 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOTOFF12);
1636 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOTRELAX);
1637 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GNU_VTENTRY);
1638 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GNU_VTINHERIT);
1639 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP11);
1640 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP8);
1641 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_GD32);
1642 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LDM32);
1643 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LDO32);
1644 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_IE32);
1645 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LE32);
1646 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LDO12);
1647 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LE12);
1648 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_IE12GP);
1649 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_0);
1650 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_1);
1651 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_2);
1652 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_3);
1653 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_4);
1654 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_5);
1655 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_6);
1656 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_7);
1657 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_8);
1658 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_9);
1659 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_10);
1660 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_11);
1661 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_12);
1662 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_13);
1663 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_14);
1664 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_15);
1665 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ME_TOO);
1666 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_TLS_DESCSEQ16);
1667 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_TLS_DESCSEQ32);
1672 case ELF::EM_HEXAGON:
1674 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_NONE);
1675 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B22_PCREL);
1676 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B15_PCREL);
1677 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B7_PCREL);
1678 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_LO16);
1679 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_HI16);
1680 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32);
1681 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_16);
1682 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_8);
1683 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_0);
1684 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_1);
1685 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_2);
1686 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_3);
1687 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_HL16);
1688 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B13_PCREL);
1689 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B9_PCREL);
1690 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B32_PCREL_X);
1691 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32_6_X);
1692 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B22_PCREL_X);
1693 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B15_PCREL_X);
1694 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B13_PCREL_X);
1695 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B9_PCREL_X);
1696 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B7_PCREL_X);
1697 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_16_X);
1698 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_12_X);
1699 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_11_X);
1700 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_10_X);
1701 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_9_X);
1702 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_8_X);
1703 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_7_X);
1704 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_6_X);
1705 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32_PCREL);
1706 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_COPY);
1707 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GLOB_DAT);
1708 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_JMP_SLOT);
1709 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_RELATIVE);
1710 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_PLT_B22_PCREL);
1711 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_LO16);
1712 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_HI16);
1713 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_32);
1714 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_LO16);
1715 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_HI16);
1716 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_32);
1717 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_16);
1718 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPMOD_32);
1719 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_LO16);
1720 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_HI16);
1721 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_32);
1722 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_16);
1723 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_PLT_B22_PCREL);
1724 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_LO16);
1725 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_HI16);
1726 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_32);
1727 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_16);
1728 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_LO16);
1729 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_HI16);
1730 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_32);
1731 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_LO16);
1732 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_HI16);
1733 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_32);
1734 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_16);
1735 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_LO16);
1736 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_HI16);
1737 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_32);
1738 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_16);
1739 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_6_PCREL_X);
1740 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_32_6_X);
1741 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_16_X);
1742 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_11_X);
1743 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_32_6_X);
1744 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_16_X);
1745 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_11_X);
1746 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_32_6_X);
1747 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_16_X);
1748 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_11_X);
1749 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_32_6_X);
1750 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_16_X);
1751 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_11_X);
1752 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_32_6_X);
1753 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_16_X);
1754 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_32_6_X);
1755 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_16_X);
1756 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_11_X);
1757 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_32_6_X);
1758 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_16_X);
1759 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_11_X);
1767 Result.append(res.begin(), res.end());
1768 return object_error::success;
1771 #undef LLVM_ELF_SWITCH_RELOC_TYPE_NAME
1773 template<support::endianness target_endianness, bool is64Bits>
1774 error_code ELFObjectFile<target_endianness, is64Bits>
1775 ::getRelocationAdditionalInfo(DataRefImpl Rel,
1776 int64_t &Result) const {
1777 const Elf_Shdr *sec = getSection(Rel.w.b);
1778 switch (sec->sh_type) {
1780 report_fatal_error("Invalid section type in Rel!");
1781 case ELF::SHT_REL : {
1783 return object_error::success;
1785 case ELF::SHT_RELA : {
1786 Result = getRela(Rel)->r_addend;
1787 return object_error::success;
1792 template<support::endianness target_endianness, bool is64Bits>
1793 error_code ELFObjectFile<target_endianness, is64Bits>
1794 ::getRelocationValueString(DataRefImpl Rel,
1795 SmallVectorImpl<char> &Result) const {
1796 const Elf_Shdr *sec = getSection(Rel.w.b);
1800 uint16_t symbol_index = 0;
1801 switch (sec->sh_type) {
1803 return object_error::parse_failed;
1804 case ELF::SHT_REL: {
1805 type = getRel(Rel)->getType();
1806 symbol_index = getRel(Rel)->getSymbol();
1807 // TODO: Read implicit addend from section data.
1810 case ELF::SHT_RELA: {
1811 type = getRela(Rel)->getType();
1812 symbol_index = getRela(Rel)->getSymbol();
1813 addend = getRela(Rel)->r_addend;
1817 const Elf_Sym *symb = getEntry<Elf_Sym>(sec->sh_link, symbol_index);
1819 if (error_code ec = getSymbolName(getSection(sec->sh_link), symb, symname))
1821 switch (Header->e_machine) {
1822 case ELF::EM_X86_64:
1824 case ELF::R_X86_64_PC8:
1825 case ELF::R_X86_64_PC16:
1826 case ELF::R_X86_64_PC32: {
1828 raw_string_ostream fmt(fmtbuf);
1829 fmt << symname << (addend < 0 ? "" : "+") << addend << "-P";
1831 Result.append(fmtbuf.begin(), fmtbuf.end());
1834 case ELF::R_X86_64_8:
1835 case ELF::R_X86_64_16:
1836 case ELF::R_X86_64_32:
1837 case ELF::R_X86_64_32S:
1838 case ELF::R_X86_64_64: {
1840 raw_string_ostream fmt(fmtbuf);
1841 fmt << symname << (addend < 0 ? "" : "+") << addend;
1843 Result.append(fmtbuf.begin(), fmtbuf.end());
1851 case ELF::EM_HEXAGON:
1858 Result.append(res.begin(), res.end());
1859 return object_error::success;
1862 // Verify that the last byte in the string table in a null.
1863 template<support::endianness target_endianness, bool is64Bits>
1864 void ELFObjectFile<target_endianness, is64Bits>
1865 ::VerifyStrTab(const Elf_Shdr *sh) const {
1866 const char *strtab = (const char*)base() + sh->sh_offset;
1867 if (strtab[sh->sh_size - 1] != 0)
1868 // FIXME: Proper error handling.
1869 report_fatal_error("String table must end with a null terminator!");
1872 template<support::endianness target_endianness, bool is64Bits>
1873 ELFObjectFile<target_endianness, is64Bits>::ELFObjectFile(MemoryBuffer *Object
1875 : ObjectFile(getELFType(target_endianness == support::little, is64Bits),
1877 , isDyldELFObject(false)
1878 , SectionHeaderTable(0)
1879 , dot_shstrtab_sec(0)
1882 , dot_dynamic_sec(0)
1883 , dot_gnu_version_sec(0)
1884 , dot_gnu_version_r_sec(0)
1885 , dot_gnu_version_d_sec(0)
1889 const uint64_t FileSize = Data->getBufferSize();
1891 if (sizeof(Elf_Ehdr) > FileSize)
1892 // FIXME: Proper error handling.
1893 report_fatal_error("File too short!");
1895 Header = reinterpret_cast<const Elf_Ehdr *>(base());
1897 if (Header->e_shoff == 0)
1900 const uint64_t SectionTableOffset = Header->e_shoff;
1902 if (SectionTableOffset + sizeof(Elf_Shdr) > FileSize)
1903 // FIXME: Proper error handling.
1904 report_fatal_error("Section header table goes past end of file!");
1906 // The getNumSections() call below depends on SectionHeaderTable being set.
1907 SectionHeaderTable =
1908 reinterpret_cast<const Elf_Shdr *>(base() + SectionTableOffset);
1909 const uint64_t SectionTableSize = getNumSections() * Header->e_shentsize;
1911 if (SectionTableOffset + SectionTableSize > FileSize)
1912 // FIXME: Proper error handling.
1913 report_fatal_error("Section table goes past end of file!");
1915 // To find the symbol tables we walk the section table to find SHT_SYMTAB.
1916 const Elf_Shdr* SymbolTableSectionHeaderIndex = 0;
1917 const Elf_Shdr* sh = SectionHeaderTable;
1919 // Reserve SymbolTableSections[0] for .dynsym
1920 SymbolTableSections.push_back(NULL);
1922 for (uint64_t i = 0, e = getNumSections(); i != e; ++i) {
1923 switch (sh->sh_type) {
1924 case ELF::SHT_SYMTAB_SHNDX: {
1925 if (SymbolTableSectionHeaderIndex)
1926 // FIXME: Proper error handling.
1927 report_fatal_error("More than one .symtab_shndx!");
1928 SymbolTableSectionHeaderIndex = sh;
1931 case ELF::SHT_SYMTAB: {
1932 SymbolTableSectionsIndexMap[i] = SymbolTableSections.size();
1933 SymbolTableSections.push_back(sh);
1936 case ELF::SHT_DYNSYM: {
1937 if (SymbolTableSections[0] != NULL)
1938 // FIXME: Proper error handling.
1939 report_fatal_error("More than one .dynsym!");
1940 SymbolTableSectionsIndexMap[i] = 0;
1941 SymbolTableSections[0] = sh;
1945 case ELF::SHT_RELA: {
1946 SectionRelocMap[getSection(sh->sh_info)].push_back(i);
1949 case ELF::SHT_DYNAMIC: {
1950 if (dot_dynamic_sec != NULL)
1951 // FIXME: Proper error handling.
1952 report_fatal_error("More than one .dynamic!");
1953 dot_dynamic_sec = sh;
1956 case ELF::SHT_GNU_versym: {
1957 if (dot_gnu_version_sec != NULL)
1958 // FIXME: Proper error handling.
1959 report_fatal_error("More than one .gnu.version section!");
1960 dot_gnu_version_sec = sh;
1963 case ELF::SHT_GNU_verdef: {
1964 if (dot_gnu_version_d_sec != NULL)
1965 // FIXME: Proper error handling.
1966 report_fatal_error("More than one .gnu.version_d section!");
1967 dot_gnu_version_d_sec = sh;
1970 case ELF::SHT_GNU_verneed: {
1971 if (dot_gnu_version_r_sec != NULL)
1972 // FIXME: Proper error handling.
1973 report_fatal_error("More than one .gnu.version_r section!");
1974 dot_gnu_version_r_sec = sh;
1981 // Sort section relocation lists by index.
1982 for (typename RelocMap_t::iterator i = SectionRelocMap.begin(),
1983 e = SectionRelocMap.end(); i != e; ++i) {
1984 std::sort(i->second.begin(), i->second.end());
1987 // Get string table sections.
1988 dot_shstrtab_sec = getSection(getStringTableIndex());
1989 if (dot_shstrtab_sec) {
1990 // Verify that the last byte in the string table in a null.
1991 VerifyStrTab(dot_shstrtab_sec);
1994 // Merge this into the above loop.
1995 for (const char *i = reinterpret_cast<const char *>(SectionHeaderTable),
1996 *e = i + getNumSections() * Header->e_shentsize;
1997 i != e; i += Header->e_shentsize) {
1998 const Elf_Shdr *sh = reinterpret_cast<const Elf_Shdr*>(i);
1999 if (sh->sh_type == ELF::SHT_STRTAB) {
2000 StringRef SectionName(getString(dot_shstrtab_sec, sh->sh_name));
2001 if (SectionName == ".strtab") {
2002 if (dot_strtab_sec != 0)
2003 // FIXME: Proper error handling.
2004 report_fatal_error("Already found section named .strtab!");
2005 dot_strtab_sec = sh;
2006 VerifyStrTab(dot_strtab_sec);
2007 } else if (SectionName == ".dynstr") {
2008 if (dot_dynstr_sec != 0)
2009 // FIXME: Proper error handling.
2010 report_fatal_error("Already found section named .dynstr!");
2011 dot_dynstr_sec = sh;
2012 VerifyStrTab(dot_dynstr_sec);
2017 // Build symbol name side-mapping if there is one.
2018 if (SymbolTableSectionHeaderIndex) {
2019 const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() +
2020 SymbolTableSectionHeaderIndex->sh_offset);
2022 for (symbol_iterator si = begin_symbols(),
2023 se = end_symbols(); si != se; si.increment(ec)) {
2025 report_fatal_error("Fewer extended symbol table entries than symbols!");
2026 if (*ShndxTable != ELF::SHN_UNDEF)
2027 ExtendedSymbolTable[getSymbol(si->getRawDataRefImpl())] = *ShndxTable;
2033 template<support::endianness target_endianness, bool is64Bits>
2034 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
2035 ::begin_symbols() const {
2036 DataRefImpl SymbolData;
2037 if (SymbolTableSections.size() <= 1) {
2038 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
2039 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
2041 SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
2042 SymbolData.d.b = 1; // The 0th table is .dynsym
2044 return symbol_iterator(SymbolRef(SymbolData, this));
2047 template<support::endianness target_endianness, bool is64Bits>
2048 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
2049 ::end_symbols() const {
2050 DataRefImpl SymbolData;
2051 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
2052 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
2053 return symbol_iterator(SymbolRef(SymbolData, this));
2056 template<support::endianness target_endianness, bool is64Bits>
2057 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
2058 ::begin_dynamic_symbols() const {
2059 DataRefImpl SymbolData;
2060 if (SymbolTableSections[0] == NULL) {
2061 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
2062 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
2064 SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
2065 SymbolData.d.b = 0; // The 0th table is .dynsym
2067 return symbol_iterator(SymbolRef(SymbolData, this));
2070 template<support::endianness target_endianness, bool is64Bits>
2071 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
2072 ::end_dynamic_symbols() const {
2073 DataRefImpl SymbolData;
2074 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
2075 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
2076 return symbol_iterator(SymbolRef(SymbolData, this));
2079 template<support::endianness target_endianness, bool is64Bits>
2080 section_iterator ELFObjectFile<target_endianness, is64Bits>
2081 ::begin_sections() const {
2083 ret.p = reinterpret_cast<intptr_t>(base() + Header->e_shoff);
2084 return section_iterator(SectionRef(ret, this));
2087 template<support::endianness target_endianness, bool is64Bits>
2088 section_iterator ELFObjectFile<target_endianness, is64Bits>
2089 ::end_sections() const {
2091 ret.p = reinterpret_cast<intptr_t>(base()
2093 + (Header->e_shentsize*getNumSections()));
2094 return section_iterator(SectionRef(ret, this));
2097 template<support::endianness target_endianness, bool is64Bits>
2098 typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
2099 ELFObjectFile<target_endianness, is64Bits>::begin_dynamic_table() const {
2100 DataRefImpl DynData;
2101 if (dot_dynamic_sec == NULL || dot_dynamic_sec->sh_size == 0) {
2102 DynData.d.a = std::numeric_limits<uint32_t>::max();
2106 return dyn_iterator(DynRef(DynData, this));
2109 template<support::endianness target_endianness, bool is64Bits>
2110 typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
2111 ELFObjectFile<target_endianness, is64Bits>
2112 ::end_dynamic_table() const {
2113 DataRefImpl DynData;
2114 DynData.d.a = std::numeric_limits<uint32_t>::max();
2115 return dyn_iterator(DynRef(DynData, this));
2118 template<support::endianness target_endianness, bool is64Bits>
2119 error_code ELFObjectFile<target_endianness, is64Bits>
2120 ::getDynNext(DataRefImpl DynData,
2121 DynRef &Result) const {
2124 // Check to see if we are at the end of .dynamic
2125 if (DynData.d.a >= dot_dynamic_sec->getEntityCount()) {
2126 // We are at the end. Return the terminator.
2127 DynData.d.a = std::numeric_limits<uint32_t>::max();
2130 Result = DynRef(DynData, this);
2131 return object_error::success;
2134 template<support::endianness target_endianness, bool is64Bits>
2136 ELFObjectFile<target_endianness, is64Bits>::getLoadName() const {
2138 // Find the DT_SONAME entry
2139 dyn_iterator it = begin_dynamic_table();
2140 dyn_iterator ie = end_dynamic_table();
2143 if (it->getTag() == ELF::DT_SONAME)
2147 report_fatal_error("dynamic table iteration failed");
2150 if (dot_dynstr_sec == NULL)
2151 report_fatal_error("Dynamic string table is missing");
2152 dt_soname = getString(dot_dynstr_sec, it->getVal());
2160 template<support::endianness target_endianness, bool is64Bits>
2161 library_iterator ELFObjectFile<target_endianness, is64Bits>
2162 ::begin_libraries_needed() const {
2163 // Find the first DT_NEEDED entry
2164 dyn_iterator i = begin_dynamic_table();
2165 dyn_iterator e = end_dynamic_table();
2168 if (i->getTag() == ELF::DT_NEEDED)
2172 report_fatal_error("dynamic table iteration failed");
2174 // Use the same DataRefImpl format as DynRef.
2175 return library_iterator(LibraryRef(i->getRawDataRefImpl(), this));
2178 template<support::endianness target_endianness, bool is64Bits>
2179 error_code ELFObjectFile<target_endianness, is64Bits>
2180 ::getLibraryNext(DataRefImpl Data,
2181 LibraryRef &Result) const {
2182 // Use the same DataRefImpl format as DynRef.
2183 dyn_iterator i = dyn_iterator(DynRef(Data, this));
2184 dyn_iterator e = end_dynamic_table();
2186 // Skip the current dynamic table entry.
2190 // TODO: proper error handling
2192 report_fatal_error("dynamic table iteration failed");
2195 // Find the next DT_NEEDED entry.
2197 if (i->getTag() == ELF::DT_NEEDED)
2201 report_fatal_error("dynamic table iteration failed");
2203 Result = LibraryRef(i->getRawDataRefImpl(), this);
2204 return object_error::success;
2207 template<support::endianness target_endianness, bool is64Bits>
2208 error_code ELFObjectFile<target_endianness, is64Bits>
2209 ::getLibraryPath(DataRefImpl Data, StringRef &Res) const {
2210 dyn_iterator i = dyn_iterator(DynRef(Data, this));
2211 if (i == end_dynamic_table())
2212 report_fatal_error("getLibraryPath() called on iterator end");
2214 if (i->getTag() != ELF::DT_NEEDED)
2215 report_fatal_error("Invalid library_iterator");
2217 // This uses .dynstr to lookup the name of the DT_NEEDED entry.
2218 // THis works as long as DT_STRTAB == .dynstr. This is true most of
2219 // the time, but the specification allows exceptions.
2220 // TODO: This should really use DT_STRTAB instead. Doing this requires
2221 // reading the program headers.
2222 if (dot_dynstr_sec == NULL)
2223 report_fatal_error("Dynamic string table is missing");
2224 Res = getString(dot_dynstr_sec, i->getVal());
2225 return object_error::success;
2228 template<support::endianness target_endianness, bool is64Bits>
2229 library_iterator ELFObjectFile<target_endianness, is64Bits>
2230 ::end_libraries_needed() const {
2231 dyn_iterator e = end_dynamic_table();
2232 // Use the same DataRefImpl format as DynRef.
2233 return library_iterator(LibraryRef(e->getRawDataRefImpl(), this));
2236 template<support::endianness target_endianness, bool is64Bits>
2237 uint8_t ELFObjectFile<target_endianness, is64Bits>::getBytesInAddress() const {
2238 return is64Bits ? 8 : 4;
2241 template<support::endianness target_endianness, bool is64Bits>
2242 StringRef ELFObjectFile<target_endianness, is64Bits>
2243 ::getFileFormatName() const {
2244 switch(Header->e_ident[ELF::EI_CLASS]) {
2245 case ELF::ELFCLASS32:
2246 switch(Header->e_machine) {
2248 return "ELF32-i386";
2249 case ELF::EM_X86_64:
2250 return "ELF32-x86-64";
2253 case ELF::EM_HEXAGON:
2254 return "ELF32-hexagon";
2256 return "ELF32-unknown";
2258 case ELF::ELFCLASS64:
2259 switch(Header->e_machine) {
2261 return "ELF64-i386";
2262 case ELF::EM_X86_64:
2263 return "ELF64-x86-64";
2265 return "ELF64-unknown";
2268 // FIXME: Proper error handling.
2269 report_fatal_error("Invalid ELFCLASS!");
2273 template<support::endianness target_endianness, bool is64Bits>
2274 unsigned ELFObjectFile<target_endianness, is64Bits>::getArch() const {
2275 switch(Header->e_machine) {
2278 case ELF::EM_X86_64:
2279 return Triple::x86_64;
2282 case ELF::EM_HEXAGON:
2283 return Triple::hexagon;
2285 return (target_endianness == support::little) ?
2286 Triple::mipsel : Triple::mips;
2288 return Triple::UnknownArch;
2292 template<support::endianness target_endianness, bool is64Bits>
2293 uint64_t ELFObjectFile<target_endianness, is64Bits>::getNumSections() const {
2294 assert(Header && "Header not initialized!");
2295 if (Header->e_shnum == ELF::SHN_UNDEF) {
2296 assert(SectionHeaderTable && "SectionHeaderTable not initialized!");
2297 return SectionHeaderTable->sh_size;
2299 return Header->e_shnum;
2302 template<support::endianness target_endianness, bool is64Bits>
2304 ELFObjectFile<target_endianness, is64Bits>::getStringTableIndex() const {
2305 if (Header->e_shnum == ELF::SHN_UNDEF) {
2306 if (Header->e_shstrndx == ELF::SHN_HIRESERVE)
2307 return SectionHeaderTable->sh_link;
2308 if (Header->e_shstrndx >= getNumSections())
2311 return Header->e_shstrndx;
2315 template<support::endianness target_endianness, bool is64Bits>
2316 template<typename T>
2318 ELFObjectFile<target_endianness, is64Bits>::getEntry(uint16_t Section,
2319 uint32_t Entry) const {
2320 return getEntry<T>(getSection(Section), Entry);
2323 template<support::endianness target_endianness, bool is64Bits>
2324 template<typename T>
2326 ELFObjectFile<target_endianness, is64Bits>::getEntry(const Elf_Shdr * Section,
2327 uint32_t Entry) const {
2328 return reinterpret_cast<const T *>(
2330 + Section->sh_offset
2331 + (Entry * Section->sh_entsize));
2334 template<support::endianness target_endianness, bool is64Bits>
2335 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
2336 ELFObjectFile<target_endianness, is64Bits>::getSymbol(DataRefImpl Symb) const {
2337 return getEntry<Elf_Sym>(SymbolTableSections[Symb.d.b], Symb.d.a);
2340 template<support::endianness target_endianness, bool is64Bits>
2341 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Dyn *
2342 ELFObjectFile<target_endianness, is64Bits>::getDyn(DataRefImpl DynData) const {
2343 return getEntry<Elf_Dyn>(dot_dynamic_sec, DynData.d.a);
2346 template<support::endianness target_endianness, bool is64Bits>
2347 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rel *
2348 ELFObjectFile<target_endianness, is64Bits>::getRel(DataRefImpl Rel) const {
2349 return getEntry<Elf_Rel>(Rel.w.b, Rel.w.c);
2352 template<support::endianness target_endianness, bool is64Bits>
2353 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rela *
2354 ELFObjectFile<target_endianness, is64Bits>::getRela(DataRefImpl Rela) const {
2355 return getEntry<Elf_Rela>(Rela.w.b, Rela.w.c);
2358 template<support::endianness target_endianness, bool is64Bits>
2359 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
2360 ELFObjectFile<target_endianness, is64Bits>::getSection(DataRefImpl Symb) const {
2361 const Elf_Shdr *sec = getSection(Symb.d.b);
2362 if (sec->sh_type != ELF::SHT_SYMTAB || sec->sh_type != ELF::SHT_DYNSYM)
2363 // FIXME: Proper error handling.
2364 report_fatal_error("Invalid symbol table section!");
2368 template<support::endianness target_endianness, bool is64Bits>
2369 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
2370 ELFObjectFile<target_endianness, is64Bits>::getSection(uint32_t index) const {
2373 if (!SectionHeaderTable || index >= getNumSections())
2374 // FIXME: Proper error handling.
2375 report_fatal_error("Invalid section index!");
2377 return reinterpret_cast<const Elf_Shdr *>(
2378 reinterpret_cast<const char *>(SectionHeaderTable)
2379 + (index * Header->e_shentsize));
2382 template<support::endianness target_endianness, bool is64Bits>
2383 const char *ELFObjectFile<target_endianness, is64Bits>
2384 ::getString(uint32_t section,
2385 ELF::Elf32_Word offset) const {
2386 return getString(getSection(section), offset);
2389 template<support::endianness target_endianness, bool is64Bits>
2390 const char *ELFObjectFile<target_endianness, is64Bits>
2391 ::getString(const Elf_Shdr *section,
2392 ELF::Elf32_Word offset) const {
2393 assert(section && section->sh_type == ELF::SHT_STRTAB && "Invalid section!");
2394 if (offset >= section->sh_size)
2395 // FIXME: Proper error handling.
2396 report_fatal_error("Symbol name offset outside of string table!");
2397 return (const char *)base() + section->sh_offset + offset;
2400 template<support::endianness target_endianness, bool is64Bits>
2401 error_code ELFObjectFile<target_endianness, is64Bits>
2402 ::getSymbolName(const Elf_Shdr *section,
2403 const Elf_Sym *symb,
2404 StringRef &Result) const {
2405 if (symb->st_name == 0) {
2406 const Elf_Shdr *section = getSection(symb);
2410 Result = getString(dot_shstrtab_sec, section->sh_name);
2411 return object_error::success;
2414 if (section == SymbolTableSections[0]) {
2415 // Symbol is in .dynsym, use .dynstr string table
2416 Result = getString(dot_dynstr_sec, symb->st_name);
2418 // Use the default symbol table name section.
2419 Result = getString(dot_strtab_sec, symb->st_name);
2421 return object_error::success;
2424 template<support::endianness target_endianness, bool is64Bits>
2425 error_code ELFObjectFile<target_endianness, is64Bits>
2426 ::getSectionName(const Elf_Shdr *section,
2427 StringRef &Result) const {
2428 Result = StringRef(getString(dot_shstrtab_sec, section->sh_name));
2429 return object_error::success;
2432 template<support::endianness target_endianness, bool is64Bits>
2433 error_code ELFObjectFile<target_endianness, is64Bits>
2434 ::getSymbolVersion(const Elf_Shdr *section,
2435 const Elf_Sym *symb,
2437 bool &IsDefault) const {
2438 // Handle non-dynamic symbols.
2439 if (section != SymbolTableSections[0]) {
2440 // Non-dynamic symbols can have versions in their names
2441 // A name of the form 'foo@V1' indicates version 'V1', non-default.
2442 // A name of the form 'foo@@V2' indicates version 'V2', default version.
2444 error_code ec = getSymbolName(section, symb, Name);
2445 if (ec != object_error::success)
2447 size_t atpos = Name.find('@');
2448 if (atpos == StringRef::npos) {
2451 return object_error::success;
2454 if (atpos < Name.size() && Name[atpos] == '@') {
2460 Version = Name.substr(atpos);
2461 return object_error::success;
2464 // This is a dynamic symbol. Look in the GNU symbol version table.
2465 if (dot_gnu_version_sec == NULL) {
2466 // No version table.
2469 return object_error::success;
2472 // Determine the position in the symbol table of this entry.
2473 const char *sec_start = (const char*)base() + section->sh_offset;
2474 size_t entry_index = ((const char*)symb - sec_start)/section->sh_entsize;
2476 // Get the corresponding version index entry
2477 const Elf_Versym *vs = getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index);
2478 size_t version_index = vs->vs_index & ELF::VERSYM_VERSION;
2480 // Special markers for unversioned symbols.
2481 if (version_index == ELF::VER_NDX_LOCAL ||
2482 version_index == ELF::VER_NDX_GLOBAL) {
2485 return object_error::success;
2488 // Lookup this symbol in the version table
2490 if (version_index >= VersionMap.size() || VersionMap[version_index].isNull())
2491 report_fatal_error("Symbol has version index without corresponding "
2492 "define or reference entry");
2493 const VersionMapEntry &entry = VersionMap[version_index];
2495 // Get the version name string
2497 if (entry.isVerdef()) {
2498 // The first Verdaux entry holds the name.
2499 name_offset = entry.getVerdef()->getAux()->vda_name;
2501 name_offset = entry.getVernaux()->vna_name;
2503 Version = getString(dot_dynstr_sec, name_offset);
2506 if (entry.isVerdef()) {
2507 IsDefault = !(vs->vs_index & ELF::VERSYM_HIDDEN);
2512 return object_error::success;
2515 template<support::endianness target_endianness, bool is64Bits>
2516 inline DynRefImpl<target_endianness, is64Bits>
2517 ::DynRefImpl(DataRefImpl DynP, const OwningType *Owner)
2519 , OwningObject(Owner) {}
2521 template<support::endianness target_endianness, bool is64Bits>
2522 inline bool DynRefImpl<target_endianness, is64Bits>
2523 ::operator==(const DynRefImpl &Other) const {
2524 return DynPimpl == Other.DynPimpl;
2527 template<support::endianness target_endianness, bool is64Bits>
2528 inline bool DynRefImpl<target_endianness, is64Bits>
2529 ::operator <(const DynRefImpl &Other) const {
2530 return DynPimpl < Other.DynPimpl;
2533 template<support::endianness target_endianness, bool is64Bits>
2534 inline error_code DynRefImpl<target_endianness, is64Bits>
2535 ::getNext(DynRefImpl &Result) const {
2536 return OwningObject->getDynNext(DynPimpl, Result);
2539 template<support::endianness target_endianness, bool is64Bits>
2540 inline int64_t DynRefImpl<target_endianness, is64Bits>
2542 return OwningObject->getDyn(DynPimpl)->d_tag;
2545 template<support::endianness target_endianness, bool is64Bits>
2546 inline uint64_t DynRefImpl<target_endianness, is64Bits>
2548 return OwningObject->getDyn(DynPimpl)->d_un.d_val;
2551 template<support::endianness target_endianness, bool is64Bits>
2552 inline uint64_t DynRefImpl<target_endianness, is64Bits>
2554 return OwningObject->getDyn(DynPimpl)->d_un.d_ptr;
2557 template<support::endianness target_endianness, bool is64Bits>
2558 inline DataRefImpl DynRefImpl<target_endianness, is64Bits>
2559 ::getRawDataRefImpl() const {
2563 /// This is a generic interface for retrieving GNU symbol version
2564 /// information from an ELFObjectFile.
2565 static inline error_code GetELFSymbolVersion(const ObjectFile *Obj,
2566 const SymbolRef &Sym,
2569 // Little-endian 32-bit
2570 if (const ELFObjectFile<support::little, false> *ELFObj =
2571 dyn_cast<ELFObjectFile<support::little, false> >(Obj))
2572 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2574 // Big-endian 32-bit
2575 if (const ELFObjectFile<support::big, false> *ELFObj =
2576 dyn_cast<ELFObjectFile<support::big, false> >(Obj))
2577 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2579 // Little-endian 64-bit
2580 if (const ELFObjectFile<support::little, true> *ELFObj =
2581 dyn_cast<ELFObjectFile<support::little, true> >(Obj))
2582 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2584 // Big-endian 64-bit
2585 if (const ELFObjectFile<support::big, true> *ELFObj =
2586 dyn_cast<ELFObjectFile<support::big, true> >(Obj))
2587 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2589 llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");