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;
391 template<support::endianness target_endianness, bool is64Bits>
392 class ELFObjectFile : public ObjectFile {
393 LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
395 typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
396 typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
397 typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
398 typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
399 typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
400 typedef Elf_Verdef_Impl<target_endianness, is64Bits> Elf_Verdef;
401 typedef Elf_Verdaux_Impl<target_endianness, is64Bits> Elf_Verdaux;
402 typedef Elf_Verneed_Impl<target_endianness, is64Bits> Elf_Verneed;
403 typedef Elf_Vernaux_Impl<target_endianness, is64Bits> Elf_Vernaux;
404 typedef Elf_Versym_Impl<target_endianness, is64Bits> Elf_Versym;
405 typedef DynRefImpl<target_endianness, is64Bits> DynRef;
406 typedef content_iterator<DynRef> dyn_iterator;
410 unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
411 Elf_Half e_type; // Type of file (see ET_*)
412 Elf_Half e_machine; // Required architecture for this file (see EM_*)
413 Elf_Word e_version; // Must be equal to 1
414 Elf_Addr e_entry; // Address to jump to in order to start program
415 Elf_Off e_phoff; // Program header table's file offset, in bytes
416 Elf_Off e_shoff; // Section header table's file offset, in bytes
417 Elf_Word e_flags; // Processor-specific flags
418 Elf_Half e_ehsize; // Size of ELF header, in bytes
419 Elf_Half e_phentsize;// Size of an entry in the program header table
420 Elf_Half e_phnum; // Number of entries in the program header table
421 Elf_Half e_shentsize;// Size of an entry in the section header table
422 Elf_Half e_shnum; // Number of entries in the section header table
423 Elf_Half e_shstrndx; // Section header table index of section name
425 bool checkMagic() const {
426 return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
428 unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
429 unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
431 // This flag is used for classof, to distinguish ELFObjectFile from
432 // its subclass. If more subclasses will be created, this flag will
433 // have to become an enum.
434 bool isDyldELFObject;
437 typedef SmallVector<const Elf_Shdr*, 1> Sections_t;
438 typedef DenseMap<unsigned, unsigned> IndexMap_t;
439 typedef DenseMap<const Elf_Shdr*, SmallVector<uint32_t, 1> > RelocMap_t;
441 const Elf_Ehdr *Header;
442 const Elf_Shdr *SectionHeaderTable;
443 const Elf_Shdr *dot_shstrtab_sec; // Section header string table.
444 const Elf_Shdr *dot_strtab_sec; // Symbol header string table.
445 const Elf_Shdr *dot_dynstr_sec; // Dynamic symbol string table.
447 // SymbolTableSections[0] always points to the dynamic string table section
448 // header, or NULL if there is no dynamic string table.
449 Sections_t SymbolTableSections;
450 IndexMap_t SymbolTableSectionsIndexMap;
451 DenseMap<const Elf_Sym*, ELF::Elf64_Word> ExtendedSymbolTable;
453 const Elf_Shdr *dot_dynamic_sec; // .dynamic
454 const Elf_Shdr *dot_gnu_version_sec; // .gnu.version
455 const Elf_Shdr *dot_gnu_version_r_sec; // .gnu.version_r
456 const Elf_Shdr *dot_gnu_version_d_sec; // .gnu.version_d
458 // Pointer to SONAME entry in dynamic string table
459 // This is set the first time getLoadName is called.
460 mutable const char *dt_soname;
462 // Records for each version index the corresponding Verdef or Vernaux entry.
463 // This is filled the first time LoadVersionMap() is called.
464 class VersionMapEntry : public PointerIntPair<const void*, 1> {
466 // If the integer is 0, this is an Elf_Verdef*.
467 // If the integer is 1, this is an Elf_Vernaux*.
468 VersionMapEntry() : PointerIntPair<const void*, 1>(NULL, 0) { }
469 VersionMapEntry(const Elf_Verdef *verdef)
470 : PointerIntPair<const void*, 1>(verdef, 0) { }
471 VersionMapEntry(const Elf_Vernaux *vernaux)
472 : PointerIntPair<const void*, 1>(vernaux, 1) { }
473 bool isNull() const { return getPointer() == NULL; }
474 bool isVerdef() const { return !isNull() && getInt() == 0; }
475 bool isVernaux() const { return !isNull() && getInt() == 1; }
476 const Elf_Verdef *getVerdef() const {
477 return isVerdef() ? (const Elf_Verdef*)getPointer() : NULL;
479 const Elf_Vernaux *getVernaux() const {
480 return isVernaux() ? (const Elf_Vernaux*)getPointer() : NULL;
483 mutable SmallVector<VersionMapEntry, 16> VersionMap;
484 void LoadVersionDefs(const Elf_Shdr *sec) const;
485 void LoadVersionNeeds(const Elf_Shdr *ec) const;
486 void LoadVersionMap() const;
488 /// @brief Map sections to an array of relocation sections that reference
489 /// them sorted by section index.
490 RelocMap_t SectionRelocMap;
492 /// @brief Get the relocation section that contains \a Rel.
493 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
494 return getSection(Rel.w.b);
497 bool isRelocationHasAddend(DataRefImpl Rel) const;
499 const T *getEntry(uint16_t Section, uint32_t Entry) const;
501 const T *getEntry(const Elf_Shdr *Section, uint32_t Entry) const;
502 const Elf_Shdr *getSection(DataRefImpl index) const;
503 const Elf_Shdr *getSection(uint32_t index) const;
504 const Elf_Rel *getRel(DataRefImpl Rel) const;
505 const Elf_Rela *getRela(DataRefImpl Rela) const;
506 const char *getString(uint32_t section, uint32_t offset) const;
507 const char *getString(const Elf_Shdr *section, uint32_t offset) const;
508 error_code getSymbolVersion(const Elf_Shdr *section,
511 bool &IsDefault) const;
512 void VerifyStrTab(const Elf_Shdr *sh) const;
515 const Elf_Sym *getSymbol(DataRefImpl Symb) const; // FIXME: Should be private?
516 void validateSymbol(DataRefImpl Symb) const;
519 error_code getSymbolName(const Elf_Shdr *section,
521 StringRef &Res) const;
522 error_code getSectionName(const Elf_Shdr *section,
523 StringRef &Res) const;
524 const Elf_Dyn *getDyn(DataRefImpl DynData) const;
525 error_code getSymbolVersion(SymbolRef Symb, StringRef &Version,
526 bool &IsDefault) const;
528 virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
529 virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
530 virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
531 virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
532 virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
533 virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
534 virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
535 virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
536 virtual error_code getSymbolSection(DataRefImpl Symb,
537 section_iterator &Res) const;
539 friend class DynRefImpl<target_endianness, is64Bits>;
540 virtual error_code getDynNext(DataRefImpl DynData, DynRef &Result) const;
542 virtual error_code getLibraryNext(DataRefImpl Data, LibraryRef &Result) const;
543 virtual error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const;
545 virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
546 virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
547 virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
548 virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
549 virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
550 virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
551 virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
552 virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
553 virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
554 virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
556 virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
557 virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
558 virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
560 virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
561 virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;
563 virtual error_code getRelocationNext(DataRefImpl Rel,
564 RelocationRef &Res) const;
565 virtual error_code getRelocationAddress(DataRefImpl Rel,
566 uint64_t &Res) const;
567 virtual error_code getRelocationOffset(DataRefImpl Rel,
568 uint64_t &Res) const;
569 virtual error_code getRelocationSymbol(DataRefImpl Rel,
570 SymbolRef &Res) const;
571 virtual error_code getRelocationType(DataRefImpl Rel,
572 uint64_t &Res) const;
573 virtual error_code getRelocationTypeName(DataRefImpl Rel,
574 SmallVectorImpl<char> &Result) const;
575 virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
577 virtual error_code getRelocationValueString(DataRefImpl Rel,
578 SmallVectorImpl<char> &Result) const;
581 ELFObjectFile(MemoryBuffer *Object, error_code &ec);
582 virtual symbol_iterator begin_symbols() const;
583 virtual symbol_iterator end_symbols() const;
585 virtual symbol_iterator begin_dynamic_symbols() const;
586 virtual symbol_iterator end_dynamic_symbols() const;
588 virtual section_iterator begin_sections() const;
589 virtual section_iterator end_sections() const;
591 virtual library_iterator begin_libraries_needed() const;
592 virtual library_iterator end_libraries_needed() const;
594 virtual dyn_iterator begin_dynamic_table() const;
595 virtual dyn_iterator end_dynamic_table() const;
597 virtual uint8_t getBytesInAddress() const;
598 virtual StringRef getFileFormatName() const;
599 virtual StringRef getObjectType() const { return "ELF"; }
600 virtual unsigned getArch() const;
601 virtual StringRef getLoadName() const;
602 virtual error_code getSectionContents(const Elf_Shdr *sec,
603 StringRef &Res) const;
605 uint64_t getNumSections() const;
606 uint64_t getStringTableIndex() const;
607 ELF::Elf64_Word getSymbolTableIndex(const Elf_Sym *symb) const;
608 const Elf_Shdr *getSection(const Elf_Sym *symb) const;
609 const Elf_Shdr *getElfSection(section_iterator &It) const;
610 const Elf_Sym *getElfSymbol(symbol_iterator &It) const;
612 // Methods for type inquiry through isa, cast, and dyn_cast
613 bool isDyldType() const { return isDyldELFObject; }
614 static inline bool classof(const Binary *v) {
615 return v->getType() == getELFType(target_endianness == support::little,
618 static inline bool classof(const ELFObjectFile *v) { return true; }
621 // Iterate through the version definitions, and place each Elf_Verdef
622 // in the VersionMap according to its index.
623 template<support::endianness target_endianness, bool is64Bits>
624 void ELFObjectFile<target_endianness, is64Bits>::
625 LoadVersionDefs(const Elf_Shdr *sec) const {
626 unsigned vd_size = sec->sh_size; // Size of section in bytes
627 unsigned vd_count = sec->sh_info; // Number of Verdef entries
628 const char *sec_start = (const char*)base() + sec->sh_offset;
629 const char *sec_end = sec_start + vd_size;
630 // The first Verdef entry is at the start of the section.
631 const char *p = sec_start;
632 for (unsigned i = 0; i < vd_count; i++) {
633 if (p + sizeof(Elf_Verdef) > sec_end)
634 report_fatal_error("Section ended unexpectedly while scanning "
635 "version definitions.");
636 const Elf_Verdef *vd = reinterpret_cast<const Elf_Verdef *>(p);
637 if (vd->vd_version != ELF::VER_DEF_CURRENT)
638 report_fatal_error("Unexpected verdef version");
639 size_t index = vd->vd_ndx & ELF::VERSYM_VERSION;
640 if (index >= VersionMap.size())
641 VersionMap.resize(index+1);
642 VersionMap[index] = VersionMapEntry(vd);
647 // Iterate through the versions needed section, and place each Elf_Vernaux
648 // in the VersionMap according to its index.
649 template<support::endianness target_endianness, bool is64Bits>
650 void ELFObjectFile<target_endianness, is64Bits>::
651 LoadVersionNeeds(const Elf_Shdr *sec) const {
652 unsigned vn_size = sec->sh_size; // Size of section in bytes
653 unsigned vn_count = sec->sh_info; // Number of Verneed entries
654 const char *sec_start = (const char*)base() + sec->sh_offset;
655 const char *sec_end = sec_start + vn_size;
656 // The first Verneed entry is at the start of the section.
657 const char *p = sec_start;
658 for (unsigned i = 0; i < vn_count; i++) {
659 if (p + sizeof(Elf_Verneed) > sec_end)
660 report_fatal_error("Section ended unexpectedly while scanning "
661 "version needed records.");
662 const Elf_Verneed *vn = reinterpret_cast<const Elf_Verneed *>(p);
663 if (vn->vn_version != ELF::VER_NEED_CURRENT)
664 report_fatal_error("Unexpected verneed version");
665 // Iterate through the Vernaux entries
666 const char *paux = p + vn->vn_aux;
667 for (unsigned j = 0; j < vn->vn_cnt; j++) {
668 if (paux + sizeof(Elf_Vernaux) > sec_end)
669 report_fatal_error("Section ended unexpected while scanning auxiliary "
670 "version needed records.");
671 const Elf_Vernaux *vna = reinterpret_cast<const Elf_Vernaux *>(paux);
672 size_t index = vna->vna_other & ELF::VERSYM_VERSION;
673 if (index >= VersionMap.size())
674 VersionMap.resize(index+1);
675 VersionMap[index] = VersionMapEntry(vna);
676 paux += vna->vna_next;
682 template<support::endianness target_endianness, bool is64Bits>
683 void ELFObjectFile<target_endianness, is64Bits>::LoadVersionMap() const {
684 // If there is no dynamic symtab or version table, there is nothing to do.
685 if (SymbolTableSections[0] == NULL || dot_gnu_version_sec == NULL)
688 // Has the VersionMap already been loaded?
689 if (VersionMap.size() > 0)
692 // The first two version indexes are reserved.
693 // Index 0 is LOCAL, index 1 is GLOBAL.
694 VersionMap.push_back(VersionMapEntry());
695 VersionMap.push_back(VersionMapEntry());
697 if (dot_gnu_version_d_sec)
698 LoadVersionDefs(dot_gnu_version_d_sec);
700 if (dot_gnu_version_r_sec)
701 LoadVersionNeeds(dot_gnu_version_r_sec);
704 template<support::endianness target_endianness, bool is64Bits>
705 void ELFObjectFile<target_endianness, is64Bits>
706 ::validateSymbol(DataRefImpl Symb) const {
707 const Elf_Sym *symb = getSymbol(Symb);
708 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
709 // FIXME: We really need to do proper error handling in the case of an invalid
710 // input file. Because we don't use exceptions, I think we'll just pass
711 // an error object around.
713 && SymbolTableSection
714 && symb >= (const Elf_Sym*)(base()
715 + SymbolTableSection->sh_offset)
716 && symb < (const Elf_Sym*)(base()
717 + SymbolTableSection->sh_offset
718 + SymbolTableSection->sh_size)))
719 // FIXME: Proper error handling.
720 report_fatal_error("Symb must point to a valid symbol!");
723 template<support::endianness target_endianness, bool is64Bits>
724 error_code ELFObjectFile<target_endianness, is64Bits>
725 ::getSymbolNext(DataRefImpl Symb,
726 SymbolRef &Result) const {
727 validateSymbol(Symb);
728 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
731 // Check to see if we are at the end of this symbol table.
732 if (Symb.d.a >= SymbolTableSection->getEntityCount()) {
733 // We are at the end. If there are other symbol tables, jump to them.
734 // If the symbol table is .dynsym, we are iterating dynamic symbols,
735 // and there is only one table of these.
738 Symb.d.a = 1; // The 0th symbol in ELF is fake.
740 // Otherwise return the terminator.
741 if (Symb.d.b == 0 || Symb.d.b >= SymbolTableSections.size()) {
742 Symb.d.a = std::numeric_limits<uint32_t>::max();
743 Symb.d.b = std::numeric_limits<uint32_t>::max();
747 Result = SymbolRef(Symb, this);
748 return object_error::success;
751 template<support::endianness target_endianness, bool is64Bits>
752 error_code ELFObjectFile<target_endianness, is64Bits>
753 ::getSymbolName(DataRefImpl Symb,
754 StringRef &Result) const {
755 validateSymbol(Symb);
756 const Elf_Sym *symb = getSymbol(Symb);
757 return getSymbolName(SymbolTableSections[Symb.d.b], symb, Result);
760 template<support::endianness target_endianness, bool is64Bits>
761 error_code ELFObjectFile<target_endianness, is64Bits>
762 ::getSymbolVersion(SymbolRef SymRef,
764 bool &IsDefault) const {
765 DataRefImpl Symb = SymRef.getRawDataRefImpl();
766 validateSymbol(Symb);
767 const Elf_Sym *symb = getSymbol(Symb);
768 return getSymbolVersion(SymbolTableSections[Symb.d.b], symb,
772 template<support::endianness target_endianness, bool is64Bits>
773 ELF::Elf64_Word ELFObjectFile<target_endianness, is64Bits>
774 ::getSymbolTableIndex(const Elf_Sym *symb) const {
775 if (symb->st_shndx == ELF::SHN_XINDEX)
776 return ExtendedSymbolTable.lookup(symb);
777 return symb->st_shndx;
780 template<support::endianness target_endianness, bool is64Bits>
781 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
782 ELFObjectFile<target_endianness, is64Bits>
783 ::getSection(const Elf_Sym *symb) const {
784 if (symb->st_shndx == ELF::SHN_XINDEX)
785 return getSection(ExtendedSymbolTable.lookup(symb));
786 if (symb->st_shndx >= ELF::SHN_LORESERVE)
788 return getSection(symb->st_shndx);
791 template<support::endianness target_endianness, bool is64Bits>
792 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
793 ELFObjectFile<target_endianness, is64Bits>
794 ::getElfSection(section_iterator &It) const {
795 llvm::object::DataRefImpl ShdrRef = It->getRawDataRefImpl();
796 return const_cast<Elf_Shdr*>(reinterpret_cast<const Elf_Shdr *>
800 template<support::endianness target_endianness, bool is64Bits>
801 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
802 ELFObjectFile<target_endianness, is64Bits>
803 ::getElfSymbol(symbol_iterator &It) const {
804 return getSymbol(It->getRawDataRefImpl());
807 template<support::endianness target_endianness, bool is64Bits>
808 error_code ELFObjectFile<target_endianness, is64Bits>
809 ::getSymbolFileOffset(DataRefImpl Symb,
810 uint64_t &Result) const {
811 validateSymbol(Symb);
812 const Elf_Sym *symb = getSymbol(Symb);
813 const Elf_Shdr *Section;
814 switch (getSymbolTableIndex(symb)) {
815 case ELF::SHN_COMMON:
816 // Unintialized symbols have no offset in the object file
818 Result = UnknownAddressOrSize;
819 return object_error::success;
821 Result = symb->st_value;
822 return object_error::success;
823 default: Section = getSection(symb);
826 switch (symb->getType()) {
827 case ELF::STT_SECTION:
828 Result = Section ? Section->sh_addr : UnknownAddressOrSize;
829 return object_error::success;
831 case ELF::STT_OBJECT:
832 case ELF::STT_NOTYPE:
833 Result = symb->st_value +
834 (Section ? Section->sh_offset : 0);
835 return object_error::success;
837 Result = UnknownAddressOrSize;
838 return object_error::success;
842 template<support::endianness target_endianness, bool is64Bits>
843 error_code ELFObjectFile<target_endianness, is64Bits>
844 ::getSymbolAddress(DataRefImpl Symb,
845 uint64_t &Result) const {
846 validateSymbol(Symb);
847 const Elf_Sym *symb = getSymbol(Symb);
848 const Elf_Shdr *Section;
849 switch (getSymbolTableIndex(symb)) {
850 case ELF::SHN_COMMON:
852 Result = UnknownAddressOrSize;
853 return object_error::success;
855 Result = symb->st_value;
856 return object_error::success;
857 default: Section = getSection(symb);
860 switch (symb->getType()) {
861 case ELF::STT_SECTION:
862 Result = Section ? Section->sh_addr : UnknownAddressOrSize;
863 return object_error::success;
865 case ELF::STT_OBJECT:
866 case ELF::STT_NOTYPE:
867 Result = symb->st_value + (Section ? Section->sh_addr : 0);
868 return object_error::success;
870 Result = UnknownAddressOrSize;
871 return object_error::success;
875 template<support::endianness target_endianness, bool is64Bits>
876 error_code ELFObjectFile<target_endianness, is64Bits>
877 ::getSymbolSize(DataRefImpl Symb,
878 uint64_t &Result) const {
879 validateSymbol(Symb);
880 const Elf_Sym *symb = getSymbol(Symb);
881 if (symb->st_size == 0)
882 Result = UnknownAddressOrSize;
883 Result = symb->st_size;
884 return object_error::success;
887 template<support::endianness target_endianness, bool is64Bits>
888 error_code ELFObjectFile<target_endianness, is64Bits>
889 ::getSymbolNMTypeChar(DataRefImpl Symb,
890 char &Result) const {
891 validateSymbol(Symb);
892 const Elf_Sym *symb = getSymbol(Symb);
893 const Elf_Shdr *Section = getSection(symb);
898 switch (Section->sh_type) {
899 case ELF::SHT_PROGBITS:
900 case ELF::SHT_DYNAMIC:
901 switch (Section->sh_flags) {
902 case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
904 case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
907 case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
908 case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
912 case ELF::SHT_NOBITS: ret = 'b';
916 switch (getSymbolTableIndex(symb)) {
921 case ELF::SHN_ABS: ret = 'a'; break;
922 case ELF::SHN_COMMON: ret = 'c'; break;
925 switch (symb->getBinding()) {
926 case ELF::STB_GLOBAL: ret = ::toupper(ret); break;
928 if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
931 if (symb->getType() == ELF::STT_OBJECT)
937 if (ret == '?' && symb->getType() == ELF::STT_SECTION) {
939 if (error_code ec = getSymbolName(Symb, name))
941 Result = StringSwitch<char>(name)
942 .StartsWith(".debug", 'N')
943 .StartsWith(".note", 'n')
945 return object_error::success;
949 return object_error::success;
952 template<support::endianness target_endianness, bool is64Bits>
953 error_code ELFObjectFile<target_endianness, is64Bits>
954 ::getSymbolType(DataRefImpl Symb,
955 SymbolRef::Type &Result) const {
956 validateSymbol(Symb);
957 const Elf_Sym *symb = getSymbol(Symb);
959 switch (symb->getType()) {
960 case ELF::STT_NOTYPE:
961 Result = SymbolRef::ST_Unknown;
963 case ELF::STT_SECTION:
964 Result = SymbolRef::ST_Debug;
967 Result = SymbolRef::ST_File;
970 Result = SymbolRef::ST_Function;
972 case ELF::STT_OBJECT:
973 case ELF::STT_COMMON:
975 Result = SymbolRef::ST_Data;
978 Result = SymbolRef::ST_Other;
981 return object_error::success;
984 template<support::endianness target_endianness, bool is64Bits>
985 error_code ELFObjectFile<target_endianness, is64Bits>
986 ::getSymbolFlags(DataRefImpl Symb,
987 uint32_t &Result) const {
988 validateSymbol(Symb);
989 const Elf_Sym *symb = getSymbol(Symb);
991 Result = SymbolRef::SF_None;
993 if (symb->getBinding() != ELF::STB_LOCAL)
994 Result |= SymbolRef::SF_Global;
996 if (symb->getBinding() == ELF::STB_WEAK)
997 Result |= SymbolRef::SF_Weak;
999 if (symb->st_shndx == ELF::SHN_ABS)
1000 Result |= SymbolRef::SF_Absolute;
1002 if (symb->getType() == ELF::STT_FILE ||
1003 symb->getType() == ELF::STT_SECTION)
1004 Result |= SymbolRef::SF_FormatSpecific;
1006 if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
1007 Result |= SymbolRef::SF_Undefined;
1009 if (symb->getType() == ELF::STT_COMMON ||
1010 getSymbolTableIndex(symb) == ELF::SHN_COMMON)
1011 Result |= SymbolRef::SF_Common;
1013 if (symb->getType() == ELF::STT_TLS)
1014 Result |= SymbolRef::SF_ThreadLocal;
1016 return object_error::success;
1019 template<support::endianness target_endianness, bool is64Bits>
1020 error_code ELFObjectFile<target_endianness, is64Bits>
1021 ::getSymbolSection(DataRefImpl Symb,
1022 section_iterator &Res) const {
1023 validateSymbol(Symb);
1024 const Elf_Sym *symb = getSymbol(Symb);
1025 const Elf_Shdr *sec = getSection(symb);
1027 Res = end_sections();
1030 Sec.p = reinterpret_cast<intptr_t>(sec);
1031 Res = section_iterator(SectionRef(Sec, this));
1033 return object_error::success;
1036 template<support::endianness target_endianness, bool is64Bits>
1037 error_code ELFObjectFile<target_endianness, is64Bits>
1038 ::getSectionNext(DataRefImpl Sec, SectionRef &Result) const {
1039 const uint8_t *sec = reinterpret_cast<const uint8_t *>(Sec.p);
1040 sec += Header->e_shentsize;
1041 Sec.p = reinterpret_cast<intptr_t>(sec);
1042 Result = SectionRef(Sec, this);
1043 return object_error::success;
1046 template<support::endianness target_endianness, bool is64Bits>
1047 error_code ELFObjectFile<target_endianness, is64Bits>
1048 ::getSectionName(DataRefImpl Sec,
1049 StringRef &Result) const {
1050 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1051 Result = StringRef(getString(dot_shstrtab_sec, sec->sh_name));
1052 return object_error::success;
1055 template<support::endianness target_endianness, bool is64Bits>
1056 error_code ELFObjectFile<target_endianness, is64Bits>
1057 ::getSectionAddress(DataRefImpl Sec,
1058 uint64_t &Result) const {
1059 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1060 Result = sec->sh_addr;
1061 return object_error::success;
1064 template<support::endianness target_endianness, bool is64Bits>
1065 error_code ELFObjectFile<target_endianness, is64Bits>
1066 ::getSectionSize(DataRefImpl Sec,
1067 uint64_t &Result) const {
1068 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1069 Result = sec->sh_size;
1070 return object_error::success;
1073 template<support::endianness target_endianness, bool is64Bits>
1074 error_code ELFObjectFile<target_endianness, is64Bits>
1075 ::getSectionContents(DataRefImpl Sec,
1076 StringRef &Result) const {
1077 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1078 const char *start = (const char*)base() + sec->sh_offset;
1079 Result = StringRef(start, sec->sh_size);
1080 return object_error::success;
1083 template<support::endianness target_endianness, bool is64Bits>
1084 error_code ELFObjectFile<target_endianness, is64Bits>
1085 ::getSectionContents(const Elf_Shdr *Sec,
1086 StringRef &Result) const {
1087 const char *start = (const char*)base() + Sec->sh_offset;
1088 Result = StringRef(start, Sec->sh_size);
1089 return object_error::success;
1092 template<support::endianness target_endianness, bool is64Bits>
1093 error_code ELFObjectFile<target_endianness, is64Bits>
1094 ::getSectionAlignment(DataRefImpl Sec,
1095 uint64_t &Result) const {
1096 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1097 Result = sec->sh_addralign;
1098 return object_error::success;
1101 template<support::endianness target_endianness, bool is64Bits>
1102 error_code ELFObjectFile<target_endianness, is64Bits>
1103 ::isSectionText(DataRefImpl Sec,
1104 bool &Result) const {
1105 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1106 if (sec->sh_flags & ELF::SHF_EXECINSTR)
1110 return object_error::success;
1113 template<support::endianness target_endianness, bool is64Bits>
1114 error_code ELFObjectFile<target_endianness, is64Bits>
1115 ::isSectionData(DataRefImpl Sec,
1116 bool &Result) const {
1117 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1118 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
1119 && sec->sh_type == ELF::SHT_PROGBITS)
1123 return object_error::success;
1126 template<support::endianness target_endianness, bool is64Bits>
1127 error_code ELFObjectFile<target_endianness, is64Bits>
1128 ::isSectionBSS(DataRefImpl Sec,
1129 bool &Result) const {
1130 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1131 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
1132 && sec->sh_type == ELF::SHT_NOBITS)
1136 return object_error::success;
1139 template<support::endianness target_endianness, bool is64Bits>
1140 error_code ELFObjectFile<target_endianness, is64Bits>
1141 ::isSectionRequiredForExecution(DataRefImpl Sec,
1142 bool &Result) const {
1143 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1144 if (sec->sh_flags & ELF::SHF_ALLOC)
1148 return object_error::success;
1151 template<support::endianness target_endianness, bool is64Bits>
1152 error_code ELFObjectFile<target_endianness, is64Bits>
1153 ::isSectionVirtual(DataRefImpl Sec,
1154 bool &Result) const {
1155 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1156 if (sec->sh_type == ELF::SHT_NOBITS)
1160 return object_error::success;
1163 template<support::endianness target_endianness, bool is64Bits>
1164 error_code ELFObjectFile<target_endianness, is64Bits>::isSectionZeroInit(DataRefImpl Sec,
1165 bool &Result) const {
1166 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1167 // For ELF, all zero-init sections are virtual (that is, they occupy no space
1168 // in the object image) and vice versa.
1169 if (sec->sh_flags & ELF::SHT_NOBITS)
1173 return object_error::success;
1176 template<support::endianness target_endianness, bool is64Bits>
1177 error_code ELFObjectFile<target_endianness, is64Bits>
1178 ::sectionContainsSymbol(DataRefImpl Sec,
1180 bool &Result) const {
1181 // FIXME: Unimplemented.
1183 return object_error::success;
1186 template<support::endianness target_endianness, bool is64Bits>
1187 relocation_iterator ELFObjectFile<target_endianness, is64Bits>
1188 ::getSectionRelBegin(DataRefImpl Sec) const {
1189 DataRefImpl RelData;
1190 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1191 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
1192 if (sec != 0 && ittr != SectionRelocMap.end()) {
1193 RelData.w.a = getSection(ittr->second[0])->sh_info;
1194 RelData.w.b = ittr->second[0];
1197 return relocation_iterator(RelocationRef(RelData, this));
1200 template<support::endianness target_endianness, bool is64Bits>
1201 relocation_iterator ELFObjectFile<target_endianness, is64Bits>
1202 ::getSectionRelEnd(DataRefImpl Sec) const {
1203 DataRefImpl RelData;
1204 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
1205 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
1206 if (sec != 0 && ittr != SectionRelocMap.end()) {
1207 // Get the index of the last relocation section for this section.
1208 std::size_t relocsecindex = ittr->second[ittr->second.size() - 1];
1209 const Elf_Shdr *relocsec = getSection(relocsecindex);
1210 RelData.w.a = relocsec->sh_info;
1211 RelData.w.b = relocsecindex;
1212 RelData.w.c = relocsec->sh_size / relocsec->sh_entsize;
1214 return relocation_iterator(RelocationRef(RelData, this));
1218 template<support::endianness target_endianness, bool is64Bits>
1219 error_code ELFObjectFile<target_endianness, is64Bits>
1220 ::getRelocationNext(DataRefImpl Rel,
1221 RelocationRef &Result) const {
1223 const Elf_Shdr *relocsec = getSection(Rel.w.b);
1224 if (Rel.w.c >= (relocsec->sh_size / relocsec->sh_entsize)) {
1225 // We have reached the end of the relocations for this section. See if there
1226 // is another relocation section.
1227 typename RelocMap_t::mapped_type relocseclist =
1228 SectionRelocMap.lookup(getSection(Rel.w.a));
1230 // Do a binary search for the current reloc section index (which must be
1231 // present). Then get the next one.
1232 typename RelocMap_t::mapped_type::const_iterator loc =
1233 std::lower_bound(relocseclist.begin(), relocseclist.end(), Rel.w.b);
1236 // If there is no next one, don't do anything. The ++Rel.w.c above sets Rel
1237 // to the end iterator.
1238 if (loc != relocseclist.end()) {
1243 Result = RelocationRef(Rel, this);
1244 return object_error::success;
1247 template<support::endianness target_endianness, bool is64Bits>
1248 error_code ELFObjectFile<target_endianness, is64Bits>
1249 ::getRelocationSymbol(DataRefImpl Rel,
1250 SymbolRef &Result) const {
1252 const Elf_Shdr *sec = getSection(Rel.w.b);
1253 switch (sec->sh_type) {
1255 report_fatal_error("Invalid section type in Rel!");
1256 case ELF::SHT_REL : {
1257 symbolIdx = getRel(Rel)->getSymbol();
1260 case ELF::SHT_RELA : {
1261 symbolIdx = getRela(Rel)->getSymbol();
1265 DataRefImpl SymbolData;
1266 IndexMap_t::const_iterator it = SymbolTableSectionsIndexMap.find(sec->sh_link);
1267 if (it == SymbolTableSectionsIndexMap.end())
1268 report_fatal_error("Relocation symbol table not found!");
1269 SymbolData.d.a = symbolIdx;
1270 SymbolData.d.b = it->second;
1271 Result = SymbolRef(SymbolData, this);
1272 return object_error::success;
1275 template<support::endianness target_endianness, bool is64Bits>
1276 error_code ELFObjectFile<target_endianness, is64Bits>
1277 ::getRelocationAddress(DataRefImpl Rel,
1278 uint64_t &Result) const {
1280 const Elf_Shdr *sec = getSection(Rel.w.b);
1281 switch (sec->sh_type) {
1283 report_fatal_error("Invalid section type in Rel!");
1284 case ELF::SHT_REL : {
1285 offset = getRel(Rel)->r_offset;
1288 case ELF::SHT_RELA : {
1289 offset = getRela(Rel)->r_offset;
1295 return object_error::success;
1298 template<support::endianness target_endianness, bool is64Bits>
1299 error_code ELFObjectFile<target_endianness, is64Bits>
1300 ::getRelocationOffset(DataRefImpl Rel,
1301 uint64_t &Result) const {
1303 const Elf_Shdr *sec = getSection(Rel.w.b);
1304 switch (sec->sh_type) {
1306 report_fatal_error("Invalid section type in Rel!");
1307 case ELF::SHT_REL : {
1308 offset = getRel(Rel)->r_offset;
1311 case ELF::SHT_RELA : {
1312 offset = getRela(Rel)->r_offset;
1317 Result = offset - sec->sh_addr;
1318 return object_error::success;
1321 template<support::endianness target_endianness, bool is64Bits>
1322 error_code ELFObjectFile<target_endianness, is64Bits>
1323 ::getRelocationType(DataRefImpl Rel,
1324 uint64_t &Result) const {
1325 const Elf_Shdr *sec = getSection(Rel.w.b);
1326 switch (sec->sh_type) {
1328 report_fatal_error("Invalid section type in Rel!");
1329 case ELF::SHT_REL : {
1330 Result = getRel(Rel)->getType();
1333 case ELF::SHT_RELA : {
1334 Result = getRela(Rel)->getType();
1338 return object_error::success;
1341 #define LLVM_ELF_SWITCH_RELOC_TYPE_NAME(enum) \
1342 case ELF::enum: res = #enum; break;
1344 template<support::endianness target_endianness, bool is64Bits>
1345 error_code ELFObjectFile<target_endianness, is64Bits>
1346 ::getRelocationTypeName(DataRefImpl Rel,
1347 SmallVectorImpl<char> &Result) const {
1348 const Elf_Shdr *sec = getSection(Rel.w.b);
1351 switch (sec->sh_type) {
1353 return object_error::parse_failed;
1354 case ELF::SHT_REL : {
1355 type = getRel(Rel)->getType();
1358 case ELF::SHT_RELA : {
1359 type = getRela(Rel)->getType();
1363 switch (Header->e_machine) {
1364 case ELF::EM_X86_64:
1366 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_NONE);
1367 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_64);
1368 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC32);
1369 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOT32);
1370 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PLT32);
1371 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_COPY);
1372 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GLOB_DAT);
1373 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_JUMP_SLOT);
1374 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_RELATIVE);
1375 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPCREL);
1376 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32);
1377 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32S);
1378 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_16);
1379 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC16);
1380 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_8);
1381 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC8);
1382 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPMOD64);
1383 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF64);
1384 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF64);
1385 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSGD);
1386 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSLD);
1387 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF32);
1388 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTTPOFF);
1389 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF32);
1390 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC64);
1391 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTOFF64);
1392 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32);
1393 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE32);
1394 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE64);
1395 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32_TLSDESC);
1396 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC_CALL);
1397 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC);
1404 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_NONE);
1405 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32);
1406 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC32);
1407 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOT32);
1408 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PLT32);
1409 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_COPY);
1410 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GLOB_DAT);
1411 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_JUMP_SLOT);
1412 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_RELATIVE);
1413 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTOFF);
1414 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTPC);
1415 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32PLT);
1416 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF);
1417 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE);
1418 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTIE);
1419 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE);
1420 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD);
1421 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM);
1422 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_16);
1423 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC16);
1424 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_8);
1425 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC8);
1426 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_32);
1427 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_PUSH);
1428 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_CALL);
1429 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_POP);
1430 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_32);
1431 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_PUSH);
1432 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_CALL);
1433 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_POP);
1434 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDO_32);
1435 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE_32);
1436 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE_32);
1437 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPMOD32);
1438 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPOFF32);
1439 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF32);
1440 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTDESC);
1441 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC_CALL);
1442 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC);
1443 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_IRELATIVE);
1448 case ELF::EM_HEXAGON:
1450 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_NONE);
1451 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B22_PCREL);
1452 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B15_PCREL);
1453 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B7_PCREL);
1454 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_LO16);
1455 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_HI16);
1456 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32);
1457 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_16);
1458 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_8);
1459 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_0);
1460 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_1);
1461 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_2);
1462 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_3);
1463 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_HL16);
1464 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B13_PCREL);
1465 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B9_PCREL);
1466 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B32_PCREL_X);
1467 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32_6_X);
1468 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B22_PCREL_X);
1469 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B15_PCREL_X);
1470 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B13_PCREL_X);
1471 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B9_PCREL_X);
1472 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B7_PCREL_X);
1473 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_16_X);
1474 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_12_X);
1475 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_11_X);
1476 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_10_X);
1477 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_9_X);
1478 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_8_X);
1479 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_7_X);
1480 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_6_X);
1481 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32_PCREL);
1482 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_COPY);
1483 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GLOB_DAT);
1484 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_JMP_SLOT);
1485 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_RELATIVE);
1486 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_PLT_B22_PCREL);
1487 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_LO16);
1488 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_HI16);
1489 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_32);
1490 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_LO16);
1491 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_HI16);
1492 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_32);
1493 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_16);
1494 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPMOD_32);
1495 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_LO16);
1496 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_HI16);
1497 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_32);
1498 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_16);
1499 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_PLT_B22_PCREL);
1500 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_LO16);
1501 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_HI16);
1502 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_32);
1503 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_16);
1504 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_LO16);
1505 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_HI16);
1506 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_32);
1507 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_LO16);
1508 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_HI16);
1509 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_32);
1510 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_16);
1511 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_LO16);
1512 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_HI16);
1513 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_32);
1514 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_16);
1515 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_6_PCREL_X);
1516 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_32_6_X);
1517 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_16_X);
1518 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_11_X);
1519 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_32_6_X);
1520 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_16_X);
1521 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_11_X);
1522 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_32_6_X);
1523 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_16_X);
1524 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_11_X);
1525 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_32_6_X);
1526 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_16_X);
1527 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_11_X);
1528 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_32_6_X);
1529 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_16_X);
1530 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_32_6_X);
1531 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_16_X);
1532 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_11_X);
1533 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_32_6_X);
1534 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_16_X);
1535 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_11_X);
1543 Result.append(res.begin(), res.end());
1544 return object_error::success;
1547 #undef LLVM_ELF_SWITCH_RELOC_TYPE_NAME
1549 template<support::endianness target_endianness, bool is64Bits>
1550 error_code ELFObjectFile<target_endianness, is64Bits>
1551 ::getRelocationAdditionalInfo(DataRefImpl Rel,
1552 int64_t &Result) const {
1553 const Elf_Shdr *sec = getSection(Rel.w.b);
1554 switch (sec->sh_type) {
1556 report_fatal_error("Invalid section type in Rel!");
1557 case ELF::SHT_REL : {
1559 return object_error::success;
1561 case ELF::SHT_RELA : {
1562 Result = getRela(Rel)->r_addend;
1563 return object_error::success;
1568 template<support::endianness target_endianness, bool is64Bits>
1569 error_code ELFObjectFile<target_endianness, is64Bits>
1570 ::getRelocationValueString(DataRefImpl Rel,
1571 SmallVectorImpl<char> &Result) const {
1572 const Elf_Shdr *sec = getSection(Rel.w.b);
1576 uint16_t symbol_index = 0;
1577 switch (sec->sh_type) {
1579 return object_error::parse_failed;
1580 case ELF::SHT_REL : {
1581 type = getRel(Rel)->getType();
1582 symbol_index = getRel(Rel)->getSymbol();
1583 // TODO: Read implicit addend from section data.
1586 case ELF::SHT_RELA : {
1587 type = getRela(Rel)->getType();
1588 symbol_index = getRela(Rel)->getSymbol();
1589 addend = getRela(Rel)->r_addend;
1593 const Elf_Sym *symb = getEntry<Elf_Sym>(sec->sh_link, symbol_index);
1595 if (error_code ec = getSymbolName(getSection(sec->sh_link), symb, symname))
1597 switch (Header->e_machine) {
1598 case ELF::EM_X86_64:
1600 case ELF::R_X86_64_32S:
1603 case ELF::R_X86_64_PC32: {
1605 raw_string_ostream fmt(fmtbuf);
1606 fmt << symname << (addend < 0 ? "" : "+") << addend << "-P";
1608 Result.append(fmtbuf.begin(), fmtbuf.end());
1615 case ELF::EM_HEXAGON:
1622 Result.append(res.begin(), res.end());
1623 return object_error::success;
1626 // Verify that the last byte in the string table in a null.
1627 template<support::endianness target_endianness, bool is64Bits>
1628 void ELFObjectFile<target_endianness, is64Bits>
1629 ::VerifyStrTab(const Elf_Shdr *sh) const {
1630 const char *strtab = (const char*)base() + sh->sh_offset;
1631 if (strtab[sh->sh_size - 1] != 0)
1632 // FIXME: Proper error handling.
1633 report_fatal_error("String table must end with a null terminator!");
1636 template<support::endianness target_endianness, bool is64Bits>
1637 ELFObjectFile<target_endianness, is64Bits>::ELFObjectFile(MemoryBuffer *Object
1639 : ObjectFile(getELFType(target_endianness == support::little, is64Bits),
1641 , isDyldELFObject(false)
1642 , SectionHeaderTable(0)
1643 , dot_shstrtab_sec(0)
1646 , dot_dynamic_sec(0)
1647 , dot_gnu_version_sec(0)
1648 , dot_gnu_version_r_sec(0)
1649 , dot_gnu_version_d_sec(0)
1653 const uint64_t FileSize = Data->getBufferSize();
1655 if (sizeof(Elf_Ehdr) > FileSize)
1656 // FIXME: Proper error handling.
1657 report_fatal_error("File too short!");
1659 Header = reinterpret_cast<const Elf_Ehdr *>(base());
1661 if (Header->e_shoff == 0)
1664 const uint64_t SectionTableOffset = Header->e_shoff;
1666 if (SectionTableOffset + sizeof(Elf_Shdr) > FileSize)
1667 // FIXME: Proper error handling.
1668 report_fatal_error("Section header table goes past end of file!");
1670 // The getNumSections() call below depends on SectionHeaderTable being set.
1671 SectionHeaderTable =
1672 reinterpret_cast<const Elf_Shdr *>(base() + SectionTableOffset);
1673 const uint64_t SectionTableSize = getNumSections() * Header->e_shentsize;
1675 if (SectionTableOffset + SectionTableSize > FileSize)
1676 // FIXME: Proper error handling.
1677 report_fatal_error("Section table goes past end of file!");
1679 // To find the symbol tables we walk the section table to find SHT_SYMTAB.
1680 const Elf_Shdr* SymbolTableSectionHeaderIndex = 0;
1681 const Elf_Shdr* sh = SectionHeaderTable;
1683 // Reserve SymbolTableSections[0] for .dynsym
1684 SymbolTableSections.push_back(NULL);
1686 for (uint64_t i = 0, e = getNumSections(); i != e; ++i) {
1687 switch (sh->sh_type) {
1688 case ELF::SHT_SYMTAB_SHNDX: {
1689 if (SymbolTableSectionHeaderIndex)
1690 // FIXME: Proper error handling.
1691 report_fatal_error("More than one .symtab_shndx!");
1692 SymbolTableSectionHeaderIndex = sh;
1695 case ELF::SHT_SYMTAB: {
1696 SymbolTableSectionsIndexMap[i] = SymbolTableSections.size();
1697 SymbolTableSections.push_back(sh);
1700 case ELF::SHT_DYNSYM: {
1701 if (SymbolTableSections[0] != NULL)
1702 // FIXME: Proper error handling.
1703 report_fatal_error("More than one .dynsym!");
1704 SymbolTableSectionsIndexMap[i] = 0;
1705 SymbolTableSections[0] = sh;
1709 case ELF::SHT_RELA: {
1710 SectionRelocMap[getSection(sh->sh_info)].push_back(i);
1713 case ELF::SHT_DYNAMIC: {
1714 if (dot_dynamic_sec != NULL)
1715 // FIXME: Proper error handling.
1716 report_fatal_error("More than one .dynamic!");
1717 dot_dynamic_sec = sh;
1720 case ELF::SHT_GNU_versym: {
1721 if (dot_gnu_version_sec != NULL)
1722 // FIXME: Proper error handling.
1723 report_fatal_error("More than one .gnu.version section!");
1724 dot_gnu_version_sec = sh;
1727 case ELF::SHT_GNU_verdef: {
1728 if (dot_gnu_version_d_sec != NULL)
1729 // FIXME: Proper error handling.
1730 report_fatal_error("More than one .gnu.version_d section!");
1731 dot_gnu_version_d_sec = sh;
1734 case ELF::SHT_GNU_verneed: {
1735 if (dot_gnu_version_r_sec != NULL)
1736 // FIXME: Proper error handling.
1737 report_fatal_error("More than one .gnu.version_r section!");
1738 dot_gnu_version_r_sec = sh;
1745 // Sort section relocation lists by index.
1746 for (typename RelocMap_t::iterator i = SectionRelocMap.begin(),
1747 e = SectionRelocMap.end(); i != e; ++i) {
1748 std::sort(i->second.begin(), i->second.end());
1751 // Get string table sections.
1752 dot_shstrtab_sec = getSection(getStringTableIndex());
1753 if (dot_shstrtab_sec) {
1754 // Verify that the last byte in the string table in a null.
1755 VerifyStrTab(dot_shstrtab_sec);
1758 // Merge this into the above loop.
1759 for (const char *i = reinterpret_cast<const char *>(SectionHeaderTable),
1760 *e = i + getNumSections() * Header->e_shentsize;
1761 i != e; i += Header->e_shentsize) {
1762 const Elf_Shdr *sh = reinterpret_cast<const Elf_Shdr*>(i);
1763 if (sh->sh_type == ELF::SHT_STRTAB) {
1764 StringRef SectionName(getString(dot_shstrtab_sec, sh->sh_name));
1765 if (SectionName == ".strtab") {
1766 if (dot_strtab_sec != 0)
1767 // FIXME: Proper error handling.
1768 report_fatal_error("Already found section named .strtab!");
1769 dot_strtab_sec = sh;
1770 VerifyStrTab(dot_strtab_sec);
1771 } else if (SectionName == ".dynstr") {
1772 if (dot_dynstr_sec != 0)
1773 // FIXME: Proper error handling.
1774 report_fatal_error("Already found section named .dynstr!");
1775 dot_dynstr_sec = sh;
1776 VerifyStrTab(dot_dynstr_sec);
1781 // Build symbol name side-mapping if there is one.
1782 if (SymbolTableSectionHeaderIndex) {
1783 const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() +
1784 SymbolTableSectionHeaderIndex->sh_offset);
1786 for (symbol_iterator si = begin_symbols(),
1787 se = end_symbols(); si != se; si.increment(ec)) {
1789 report_fatal_error("Fewer extended symbol table entries than symbols!");
1790 if (*ShndxTable != ELF::SHN_UNDEF)
1791 ExtendedSymbolTable[getSymbol(si->getRawDataRefImpl())] = *ShndxTable;
1797 template<support::endianness target_endianness, bool is64Bits>
1798 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
1799 ::begin_symbols() const {
1800 DataRefImpl SymbolData;
1801 if (SymbolTableSections.size() <= 1) {
1802 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
1803 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
1805 SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
1806 SymbolData.d.b = 1; // The 0th table is .dynsym
1808 return symbol_iterator(SymbolRef(SymbolData, this));
1811 template<support::endianness target_endianness, bool is64Bits>
1812 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
1813 ::end_symbols() const {
1814 DataRefImpl SymbolData;
1815 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
1816 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
1817 return symbol_iterator(SymbolRef(SymbolData, this));
1820 template<support::endianness target_endianness, bool is64Bits>
1821 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
1822 ::begin_dynamic_symbols() const {
1823 DataRefImpl SymbolData;
1824 if (SymbolTableSections[0] == NULL) {
1825 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
1826 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
1828 SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
1829 SymbolData.d.b = 0; // The 0th table is .dynsym
1831 return symbol_iterator(SymbolRef(SymbolData, this));
1834 template<support::endianness target_endianness, bool is64Bits>
1835 symbol_iterator ELFObjectFile<target_endianness, is64Bits>
1836 ::end_dynamic_symbols() const {
1837 DataRefImpl SymbolData;
1838 SymbolData.d.a = std::numeric_limits<uint32_t>::max();
1839 SymbolData.d.b = std::numeric_limits<uint32_t>::max();
1840 return symbol_iterator(SymbolRef(SymbolData, this));
1843 template<support::endianness target_endianness, bool is64Bits>
1844 section_iterator ELFObjectFile<target_endianness, is64Bits>
1845 ::begin_sections() const {
1847 ret.p = reinterpret_cast<intptr_t>(base() + Header->e_shoff);
1848 return section_iterator(SectionRef(ret, this));
1851 template<support::endianness target_endianness, bool is64Bits>
1852 section_iterator ELFObjectFile<target_endianness, is64Bits>
1853 ::end_sections() const {
1855 ret.p = reinterpret_cast<intptr_t>(base()
1857 + (Header->e_shentsize*getNumSections()));
1858 return section_iterator(SectionRef(ret, this));
1861 template<support::endianness target_endianness, bool is64Bits>
1862 typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
1863 ELFObjectFile<target_endianness, is64Bits>::begin_dynamic_table() const {
1864 DataRefImpl DynData;
1865 if (dot_dynamic_sec == NULL || dot_dynamic_sec->sh_size == 0) {
1866 DynData.d.a = std::numeric_limits<uint32_t>::max();
1870 return dyn_iterator(DynRef(DynData, this));
1873 template<support::endianness target_endianness, bool is64Bits>
1874 typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
1875 ELFObjectFile<target_endianness, is64Bits>
1876 ::end_dynamic_table() const {
1877 DataRefImpl DynData;
1878 DynData.d.a = std::numeric_limits<uint32_t>::max();
1879 return dyn_iterator(DynRef(DynData, this));
1882 template<support::endianness target_endianness, bool is64Bits>
1883 error_code ELFObjectFile<target_endianness, is64Bits>
1884 ::getDynNext(DataRefImpl DynData,
1885 DynRef &Result) const {
1888 // Check to see if we are at the end of .dynamic
1889 if (DynData.d.a >= dot_dynamic_sec->getEntityCount()) {
1890 // We are at the end. Return the terminator.
1891 DynData.d.a = std::numeric_limits<uint32_t>::max();
1894 Result = DynRef(DynData, this);
1895 return object_error::success;
1898 template<support::endianness target_endianness, bool is64Bits>
1900 ELFObjectFile<target_endianness, is64Bits>::getLoadName() const {
1902 // Find the DT_SONAME entry
1903 dyn_iterator it = begin_dynamic_table();
1904 dyn_iterator ie = end_dynamic_table();
1907 if (it->getTag() == ELF::DT_SONAME)
1911 report_fatal_error("dynamic table iteration failed");
1914 if (dot_dynstr_sec == NULL)
1915 report_fatal_error("Dynamic string table is missing");
1916 dt_soname = getString(dot_dynstr_sec, it->getVal());
1924 template<support::endianness target_endianness, bool is64Bits>
1925 library_iterator ELFObjectFile<target_endianness, is64Bits>
1926 ::begin_libraries_needed() const {
1927 // Find the first DT_NEEDED entry
1928 dyn_iterator i = begin_dynamic_table();
1929 dyn_iterator e = end_dynamic_table();
1932 if (i->getTag() == ELF::DT_NEEDED)
1936 report_fatal_error("dynamic table iteration failed");
1938 // Use the same DataRefImpl format as DynRef.
1939 return library_iterator(LibraryRef(i->getRawDataRefImpl(), this));
1942 template<support::endianness target_endianness, bool is64Bits>
1943 error_code ELFObjectFile<target_endianness, is64Bits>
1944 ::getLibraryNext(DataRefImpl Data,
1945 LibraryRef &Result) const {
1946 // Use the same DataRefImpl format as DynRef.
1947 dyn_iterator i = dyn_iterator(DynRef(Data, this));
1948 dyn_iterator e = end_dynamic_table();
1950 // Skip the current dynamic table entry.
1954 // TODO: proper error handling
1956 report_fatal_error("dynamic table iteration failed");
1959 // Find the next DT_NEEDED entry.
1961 if (i->getTag() == ELF::DT_NEEDED)
1965 report_fatal_error("dynamic table iteration failed");
1967 Result = LibraryRef(i->getRawDataRefImpl(), this);
1968 return object_error::success;
1971 template<support::endianness target_endianness, bool is64Bits>
1972 error_code ELFObjectFile<target_endianness, is64Bits>
1973 ::getLibraryPath(DataRefImpl Data, StringRef &Res) const {
1974 dyn_iterator i = dyn_iterator(DynRef(Data, this));
1975 if (i == end_dynamic_table())
1976 report_fatal_error("getLibraryPath() called on iterator end");
1978 if (i->getTag() != ELF::DT_NEEDED)
1979 report_fatal_error("Invalid library_iterator");
1981 // This uses .dynstr to lookup the name of the DT_NEEDED entry.
1982 // THis works as long as DT_STRTAB == .dynstr. This is true most of
1983 // the time, but the specification allows exceptions.
1984 // TODO: This should really use DT_STRTAB instead. Doing this requires
1985 // reading the program headers.
1986 if (dot_dynstr_sec == NULL)
1987 report_fatal_error("Dynamic string table is missing");
1988 Res = getString(dot_dynstr_sec, i->getVal());
1989 return object_error::success;
1992 template<support::endianness target_endianness, bool is64Bits>
1993 library_iterator ELFObjectFile<target_endianness, is64Bits>
1994 ::end_libraries_needed() const {
1995 dyn_iterator e = end_dynamic_table();
1996 // Use the same DataRefImpl format as DynRef.
1997 return library_iterator(LibraryRef(e->getRawDataRefImpl(), this));
2000 template<support::endianness target_endianness, bool is64Bits>
2001 uint8_t ELFObjectFile<target_endianness, is64Bits>::getBytesInAddress() const {
2002 return is64Bits ? 8 : 4;
2005 template<support::endianness target_endianness, bool is64Bits>
2006 StringRef ELFObjectFile<target_endianness, is64Bits>
2007 ::getFileFormatName() const {
2008 switch(Header->e_ident[ELF::EI_CLASS]) {
2009 case ELF::ELFCLASS32:
2010 switch(Header->e_machine) {
2012 return "ELF32-i386";
2013 case ELF::EM_X86_64:
2014 return "ELF32-x86-64";
2017 case ELF::EM_HEXAGON:
2018 return "ELF32-hexagon";
2020 return "ELF32-unknown";
2022 case ELF::ELFCLASS64:
2023 switch(Header->e_machine) {
2025 return "ELF64-i386";
2026 case ELF::EM_X86_64:
2027 return "ELF64-x86-64";
2029 return "ELF64-unknown";
2032 // FIXME: Proper error handling.
2033 report_fatal_error("Invalid ELFCLASS!");
2037 template<support::endianness target_endianness, bool is64Bits>
2038 unsigned ELFObjectFile<target_endianness, is64Bits>::getArch() const {
2039 switch(Header->e_machine) {
2042 case ELF::EM_X86_64:
2043 return Triple::x86_64;
2046 case ELF::EM_HEXAGON:
2047 return Triple::hexagon;
2049 return Triple::UnknownArch;
2053 template<support::endianness target_endianness, bool is64Bits>
2054 uint64_t ELFObjectFile<target_endianness, is64Bits>::getNumSections() const {
2055 assert(Header && "Header not initialized!");
2056 if (Header->e_shnum == ELF::SHN_UNDEF) {
2057 assert(SectionHeaderTable && "SectionHeaderTable not initialized!");
2058 return SectionHeaderTable->sh_size;
2060 return Header->e_shnum;
2063 template<support::endianness target_endianness, bool is64Bits>
2065 ELFObjectFile<target_endianness, is64Bits>::getStringTableIndex() const {
2066 if (Header->e_shnum == ELF::SHN_UNDEF) {
2067 if (Header->e_shstrndx == ELF::SHN_HIRESERVE)
2068 return SectionHeaderTable->sh_link;
2069 if (Header->e_shstrndx >= getNumSections())
2072 return Header->e_shstrndx;
2076 template<support::endianness target_endianness, bool is64Bits>
2077 template<typename T>
2079 ELFObjectFile<target_endianness, is64Bits>::getEntry(uint16_t Section,
2080 uint32_t Entry) const {
2081 return getEntry<T>(getSection(Section), Entry);
2084 template<support::endianness target_endianness, bool is64Bits>
2085 template<typename T>
2087 ELFObjectFile<target_endianness, is64Bits>::getEntry(const Elf_Shdr * Section,
2088 uint32_t Entry) const {
2089 return reinterpret_cast<const T *>(
2091 + Section->sh_offset
2092 + (Entry * Section->sh_entsize));
2095 template<support::endianness target_endianness, bool is64Bits>
2096 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
2097 ELFObjectFile<target_endianness, is64Bits>::getSymbol(DataRefImpl Symb) const {
2098 return getEntry<Elf_Sym>(SymbolTableSections[Symb.d.b], Symb.d.a);
2101 template<support::endianness target_endianness, bool is64Bits>
2102 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Dyn *
2103 ELFObjectFile<target_endianness, is64Bits>::getDyn(DataRefImpl DynData) const {
2104 return getEntry<Elf_Dyn>(dot_dynamic_sec, DynData.d.a);
2107 template<support::endianness target_endianness, bool is64Bits>
2108 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rel *
2109 ELFObjectFile<target_endianness, is64Bits>::getRel(DataRefImpl Rel) const {
2110 return getEntry<Elf_Rel>(Rel.w.b, Rel.w.c);
2113 template<support::endianness target_endianness, bool is64Bits>
2114 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rela *
2115 ELFObjectFile<target_endianness, is64Bits>::getRela(DataRefImpl Rela) const {
2116 return getEntry<Elf_Rela>(Rela.w.b, Rela.w.c);
2119 template<support::endianness target_endianness, bool is64Bits>
2120 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
2121 ELFObjectFile<target_endianness, is64Bits>::getSection(DataRefImpl Symb) const {
2122 const Elf_Shdr *sec = getSection(Symb.d.b);
2123 if (sec->sh_type != ELF::SHT_SYMTAB || sec->sh_type != ELF::SHT_DYNSYM)
2124 // FIXME: Proper error handling.
2125 report_fatal_error("Invalid symbol table section!");
2129 template<support::endianness target_endianness, bool is64Bits>
2130 const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
2131 ELFObjectFile<target_endianness, is64Bits>::getSection(uint32_t index) const {
2134 if (!SectionHeaderTable || index >= getNumSections())
2135 // FIXME: Proper error handling.
2136 report_fatal_error("Invalid section index!");
2138 return reinterpret_cast<const Elf_Shdr *>(
2139 reinterpret_cast<const char *>(SectionHeaderTable)
2140 + (index * Header->e_shentsize));
2143 template<support::endianness target_endianness, bool is64Bits>
2144 const char *ELFObjectFile<target_endianness, is64Bits>
2145 ::getString(uint32_t section,
2146 ELF::Elf32_Word offset) const {
2147 return getString(getSection(section), offset);
2150 template<support::endianness target_endianness, bool is64Bits>
2151 const char *ELFObjectFile<target_endianness, is64Bits>
2152 ::getString(const Elf_Shdr *section,
2153 ELF::Elf32_Word offset) const {
2154 assert(section && section->sh_type == ELF::SHT_STRTAB && "Invalid section!");
2155 if (offset >= section->sh_size)
2156 // FIXME: Proper error handling.
2157 report_fatal_error("Symbol name offset outside of string table!");
2158 return (const char *)base() + section->sh_offset + offset;
2161 template<support::endianness target_endianness, bool is64Bits>
2162 error_code ELFObjectFile<target_endianness, is64Bits>
2163 ::getSymbolName(const Elf_Shdr *section,
2164 const Elf_Sym *symb,
2165 StringRef &Result) const {
2166 if (symb->st_name == 0) {
2167 const Elf_Shdr *section = getSection(symb);
2171 Result = getString(dot_shstrtab_sec, section->sh_name);
2172 return object_error::success;
2175 if (section == SymbolTableSections[0]) {
2176 // Symbol is in .dynsym, use .dynstr string table
2177 Result = getString(dot_dynstr_sec, symb->st_name);
2179 // Use the default symbol table name section.
2180 Result = getString(dot_strtab_sec, symb->st_name);
2182 return object_error::success;
2185 template<support::endianness target_endianness, bool is64Bits>
2186 error_code ELFObjectFile<target_endianness, is64Bits>
2187 ::getSectionName(const Elf_Shdr *section,
2188 StringRef &Result) const {
2189 Result = StringRef(getString(dot_shstrtab_sec, section->sh_name));
2190 return object_error::success;
2193 template<support::endianness target_endianness, bool is64Bits>
2194 error_code ELFObjectFile<target_endianness, is64Bits>
2195 ::getSymbolVersion(const Elf_Shdr *section,
2196 const Elf_Sym *symb,
2198 bool &IsDefault) const {
2199 // Handle non-dynamic symbols.
2200 if (section != SymbolTableSections[0]) {
2201 // Non-dynamic symbols can have versions in their names
2202 // A name of the form 'foo@V1' indicates version 'V1', non-default.
2203 // A name of the form 'foo@@V2' indicates version 'V2', default version.
2205 error_code ec = getSymbolName(section, symb, Name);
2206 if (ec != object_error::success)
2208 size_t atpos = Name.find('@');
2209 if (atpos == StringRef::npos) {
2212 return object_error::success;
2215 if (atpos < Name.size() && Name[atpos] == '@') {
2221 Version = Name.substr(atpos);
2222 return object_error::success;
2225 // This is a dynamic symbol. Look in the GNU symbol version table.
2226 if (dot_gnu_version_sec == NULL) {
2227 // No version table.
2230 return object_error::success;
2233 // Determine the position in the symbol table of this entry.
2234 const char *sec_start = (const char*)base() + section->sh_offset;
2235 size_t entry_index = ((const char*)symb - sec_start)/section->sh_entsize;
2237 // Get the corresponding version index entry
2238 const Elf_Versym *vs = getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index);
2239 size_t version_index = vs->vs_index & ELF::VERSYM_VERSION;
2241 // Special markers for unversioned symbols.
2242 if (version_index == ELF::VER_NDX_LOCAL ||
2243 version_index == ELF::VER_NDX_GLOBAL) {
2246 return object_error::success;
2249 // Lookup this symbol in the version table
2251 if (version_index >= VersionMap.size() || VersionMap[version_index].isNull())
2252 report_fatal_error("Symbol has version index without corresponding "
2253 "define or reference entry");
2254 const VersionMapEntry &entry = VersionMap[version_index];
2256 // Get the version name string
2258 if (entry.isVerdef()) {
2259 // The first Verdaux entry holds the name.
2260 name_offset = entry.getVerdef()->getAux()->vda_name;
2262 name_offset = entry.getVernaux()->vna_name;
2264 Version = getString(dot_dynstr_sec, name_offset);
2267 if (entry.isVerdef()) {
2268 IsDefault = !(vs->vs_index & ELF::VERSYM_HIDDEN);
2273 return object_error::success;
2276 template<support::endianness target_endianness, bool is64Bits>
2277 inline DynRefImpl<target_endianness, is64Bits>
2278 ::DynRefImpl(DataRefImpl DynP, const OwningType *Owner)
2280 , OwningObject(Owner) {}
2282 template<support::endianness target_endianness, bool is64Bits>
2283 inline bool DynRefImpl<target_endianness, is64Bits>
2284 ::operator==(const DynRefImpl &Other) const {
2285 return DynPimpl == Other.DynPimpl;
2288 template<support::endianness target_endianness, bool is64Bits>
2289 inline bool DynRefImpl<target_endianness, is64Bits>
2290 ::operator <(const DynRefImpl &Other) const {
2291 return DynPimpl < Other.DynPimpl;
2294 template<support::endianness target_endianness, bool is64Bits>
2295 inline error_code DynRefImpl<target_endianness, is64Bits>
2296 ::getNext(DynRefImpl &Result) const {
2297 return OwningObject->getDynNext(DynPimpl, Result);
2300 template<support::endianness target_endianness, bool is64Bits>
2301 inline int64_t DynRefImpl<target_endianness, is64Bits>
2303 return OwningObject->getDyn(DynPimpl)->d_tag;
2306 template<support::endianness target_endianness, bool is64Bits>
2307 inline uint64_t DynRefImpl<target_endianness, is64Bits>
2309 return OwningObject->getDyn(DynPimpl)->d_un.d_val;
2312 template<support::endianness target_endianness, bool is64Bits>
2313 inline uint64_t DynRefImpl<target_endianness, is64Bits>
2315 return OwningObject->getDyn(DynPimpl)->d_un.d_ptr;
2318 template<support::endianness target_endianness, bool is64Bits>
2319 inline DataRefImpl DynRefImpl<target_endianness, is64Bits>
2320 ::getRawDataRefImpl() const {
2324 /// This is a generic interface for retrieving GNU symbol version
2325 /// information from an ELFObjectFile.
2326 static inline error_code GetELFSymbolVersion(const ObjectFile *Obj,
2327 const SymbolRef &Sym,
2330 // Little-endian 32-bit
2331 if (const ELFObjectFile<support::little, false> *ELFObj =
2332 dyn_cast<ELFObjectFile<support::little, false> >(Obj))
2333 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2335 // Big-endian 32-bit
2336 if (const ELFObjectFile<support::big, false> *ELFObj =
2337 dyn_cast<ELFObjectFile<support::big, false> >(Obj))
2338 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2340 // Little-endian 64-bit
2341 if (const ELFObjectFile<support::little, true> *ELFObj =
2342 dyn_cast<ELFObjectFile<support::little, true> >(Obj))
2343 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2345 // Big-endian 64-bit
2346 if (const ELFObjectFile<support::big, true> *ELFObj =
2347 dyn_cast<ELFObjectFile<support::big, true> >(Obj))
2348 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
2350 llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");