diff options
Diffstat (limited to 'include/llvm/Object')
| -rw-r--r-- | include/llvm/Object/Archive.h | 4 | ||||
| -rw-r--r-- | include/llvm/Object/ArchiveWriter.h | 2 | ||||
| -rw-r--r-- | include/llvm/Object/Binary.h | 4 | ||||
| -rw-r--r-- | include/llvm/Object/COFF.h | 70 | ||||
| -rw-r--r-- | include/llvm/Object/COFFYAML.h | 6 | ||||
| -rw-r--r-- | include/llvm/Object/ELF.h | 470 | ||||
| -rw-r--r-- | include/llvm/Object/ELFObjectFile.h | 589 | ||||
| -rw-r--r-- | include/llvm/Object/ELFTypes.h | 125 | ||||
| -rw-r--r-- | include/llvm/Object/Error.h | 2 | ||||
| -rw-r--r-- | include/llvm/Object/IRObjectFile.h | 4 | ||||
| -rw-r--r-- | include/llvm/Object/MachO.h | 34 | ||||
| -rw-r--r-- | include/llvm/Object/MachOUniversal.h | 6 | ||||
| -rw-r--r-- | include/llvm/Object/ObjectFile.h | 134 | ||||
| -rw-r--r-- | include/llvm/Object/RelocVisitor.h | 16 | ||||
| -rw-r--r-- | include/llvm/Object/StackMapParser.h | 442 | ||||
| -rw-r--r-- | include/llvm/Object/SymbolSize.h | 23 | ||||
| -rw-r--r-- | include/llvm/Object/SymbolicFile.h | 6 |
17 files changed, 1229 insertions, 708 deletions
diff --git a/include/llvm/Object/Archive.h b/include/llvm/Object/Archive.h index 3a52a9d..8da6919 100644 --- a/include/llvm/Object/Archive.h +++ b/include/llvm/Object/Archive.h @@ -217,7 +217,7 @@ private: unsigned IsThin : 1; }; -} // namespace object -} // namespace llvm +} +} #endif diff --git a/include/llvm/Object/ArchiveWriter.h b/include/llvm/Object/ArchiveWriter.h index 8a394fa..1616e46 100644 --- a/include/llvm/Object/ArchiveWriter.h +++ b/include/llvm/Object/ArchiveWriter.h @@ -46,6 +46,6 @@ std::pair<StringRef, std::error_code> writeArchive(StringRef ArcName, std::vector<NewArchiveIterator> &NewMembers, bool WriteSymtab); -} // namespace llvm +} #endif diff --git a/include/llvm/Object/Binary.h b/include/llvm/Object/Binary.h index 949edf8..a3d6d0d 100644 --- a/include/llvm/Object/Binary.h +++ b/include/llvm/Object/Binary.h @@ -178,7 +178,7 @@ template <typename T> const T* OwningBinary<T>::getBinary() const { } ErrorOr<OwningBinary<Binary>> createBinary(StringRef Path); -} // namespace object -} // namespace llvm +} +} #endif diff --git a/include/llvm/Object/COFF.h b/include/llvm/Object/COFF.h index ad657b5..fc60582 100644 --- a/include/llvm/Object/COFF.h +++ b/include/llvm/Object/COFF.h @@ -249,6 +249,15 @@ struct coff_symbol { typedef coff_symbol<support::ulittle16_t> coff_symbol16; typedef coff_symbol<support::ulittle32_t> coff_symbol32; +// Contains only common parts of coff_symbol16 and coff_symbol32. +struct coff_symbol_generic { + union { + char ShortName[COFF::NameSize]; + StringTableOffset Offset; + } Name; + support::ulittle32_t Value; +}; + class COFFSymbolRef { public: COFFSymbolRef(const coff_symbol16 *CS) : CS16(CS), CS32(nullptr) {} @@ -259,6 +268,12 @@ public: return CS16 ? static_cast<const void *>(CS16) : CS32; } + const coff_symbol_generic *getGeneric() const { + if (CS16) + return reinterpret_cast<const coff_symbol_generic *>(CS16); + return reinterpret_cast<const coff_symbol_generic *>(CS32); + } + friend bool operator<(COFFSymbolRef A, COFFSymbolRef B) { return A.getRawPtr() < B.getRawPtr(); } @@ -493,6 +508,29 @@ struct coff_load_configuration32 { support::ulittle32_t SEHandlerCount; }; +struct coff_load_configuration64 { + support::ulittle32_t Characteristics; + support::ulittle32_t TimeDateStamp; + support::ulittle16_t MajorVersion; + support::ulittle16_t MinorVersion; + support::ulittle32_t GlobalFlagsClear; + support::ulittle32_t GlobalFlagsSet; + support::ulittle32_t CriticalSectionDefaultTimeout; + support::ulittle32_t DeCommitFreeBlockThreshold; + support::ulittle32_t DeCommitTotalFreeThreshold; + support::ulittle32_t LockPrefixTable; + support::ulittle32_t MaximumAllocationSize; + support::ulittle32_t VirtualMemoryThreshold; + support::ulittle32_t ProcessAffinityMask; + support::ulittle32_t ProcessHeapFlags; + support::ulittle16_t CSDVersion; + support::ulittle16_t Reserved; + support::ulittle32_t EditList; + support::ulittle64_t SecurityCookie; + support::ulittle64_t SEHandlerTable; + support::ulittle64_t SEHandlerCount; +}; + struct coff_runtime_function_x64 { support::ulittle32_t BeginAddress; support::ulittle32_t EndAddress; @@ -609,14 +647,13 @@ public: } protected: void moveSymbolNext(DataRefImpl &Symb) const override; - std::error_code getSymbolName(DataRefImpl Symb, - StringRef &Res) const override; + ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override; std::error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const override; - uint64_t getSymbolSize(DataRefImpl Symb) const override; + uint64_t getSymbolValue(DataRefImpl Symb) const override; + uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override; uint32_t getSymbolFlags(DataRefImpl Symb) const override; - std::error_code getSymbolType(DataRefImpl Symb, - SymbolRef::Type &Res) const override; + SymbolRef::Type getSymbolType(DataRefImpl Symb) const override; std::error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const override; void moveSectionNext(DataRefImpl &Sec) const override; @@ -631,21 +668,17 @@ protected: bool isSectionData(DataRefImpl Sec) const override; bool isSectionBSS(DataRefImpl Sec) const override; bool isSectionVirtual(DataRefImpl Sec) const override; - bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override; relocation_iterator section_rel_begin(DataRefImpl Sec) const override; relocation_iterator section_rel_end(DataRefImpl Sec) const override; void moveRelocationNext(DataRefImpl &Rel) const override; - std::error_code getRelocationAddress(DataRefImpl Rel, - uint64_t &Res) const override; - std::error_code getRelocationOffset(DataRefImpl Rel, - uint64_t &Res) const override; + ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override; + uint64_t getRelocationOffset(DataRefImpl Rel) const override; symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override; - std::error_code getRelocationType(DataRefImpl Rel, - uint64_t &Res) const override; - std::error_code - getRelocationTypeName(DataRefImpl Rel, - SmallVectorImpl<char> &Result) const override; + uint64_t getRelocationType(DataRefImpl Rel) const override; + void getRelocationTypeName(DataRefImpl Rel, + SmallVectorImpl<char> &Result) const override; + public: COFFObjectFile(MemoryBufferRef Object, std::error_code &EC); basic_symbol_iterator symbol_begin_impl() const override; @@ -657,6 +690,8 @@ public: COFFSymbolRef getCOFFSymbol(const DataRefImpl &Ref) const; COFFSymbolRef getCOFFSymbol(const SymbolRef &Symbol) const; const coff_relocation *getCOFFRelocation(const RelocationRef &Reloc) const; + unsigned getSectionID(SectionRef Sec) const; + unsigned getSymbolSectionID(SymbolRef Sym) const; uint8_t getBytesInAddress() const override; StringRef getFileFormatName() const override; @@ -720,6 +755,8 @@ public: return std::error_code(); } std::error_code getSymbolName(COFFSymbolRef Symbol, StringRef &Res) const; + std::error_code getSymbolName(const coff_symbol_generic *Symbol, + StringRef &Res) const; ArrayRef<uint8_t> getSymbolAuxData(COFFSymbolRef Symbol) const; @@ -731,6 +768,9 @@ public: llvm_unreachable("null symbol table pointer!"); } + iterator_range<const coff_relocation *> + getRelocations(const coff_section *Sec) const; + std::error_code getSectionName(const coff_section *Sec, StringRef &Res) const; uint64_t getSectionSize(const coff_section *Sec) const; std::error_code getSectionContents(const coff_section *Sec, diff --git a/include/llvm/Object/COFFYAML.h b/include/llvm/Object/COFFYAML.h index 5ba3db3..12a2522 100644 --- a/include/llvm/Object/COFFYAML.h +++ b/include/llvm/Object/COFFYAML.h @@ -37,7 +37,7 @@ inline DLLCharacteristics operator|(DLLCharacteristics a, uint16_t Ret = static_cast<uint16_t>(a) | static_cast<uint16_t>(b); return static_cast<DLLCharacteristics>(Ret); } -} // namespace COFF +} // The structure of the yaml files is not an exact 1:1 match to COFF. In order // to use yaml::IO, we use these structures which are closer to the source. @@ -87,8 +87,8 @@ namespace COFFYAML { std::vector<Symbol> Symbols; Object(); }; -} // namespace COFFYAML -} // namespace llvm +} +} LLVM_YAML_IS_SEQUENCE_VECTOR(COFFYAML::Section) LLVM_YAML_IS_SEQUENCE_VECTOR(COFFYAML::Symbol) diff --git a/include/llvm/Object/ELF.h b/include/llvm/Object/ELF.h index e87737d..3b0c548 100644 --- a/include/llvm/Object/ELF.h +++ b/include/llvm/Object/ELF.h @@ -143,8 +143,7 @@ public: typedef iterator_range<Elf_Dyn_Iter> Elf_Dyn_Range; typedef ELFEntityIterator<const Elf_Rela> Elf_Rela_Iter; typedef ELFEntityIterator<const Elf_Rel> Elf_Rel_Iter; - typedef ELFEntityIterator<const Elf_Shdr> Elf_Shdr_Iter; - typedef iterator_range<Elf_Shdr_Iter> Elf_Shdr_Range; + typedef iterator_range<const Elf_Shdr *> Elf_Shdr_Range; /// \brief Archive files are 2 byte aligned, so we need this for /// PointerIntPair to work. @@ -158,74 +157,7 @@ public: enum { NumLowBitsAvailable = 1 }; }; - class Elf_Sym_Iter { - public: - typedef ptrdiff_t difference_type; - typedef const Elf_Sym value_type; - typedef std::random_access_iterator_tag iterator_category; - typedef value_type &reference; - typedef value_type *pointer; - - /// \brief Default construct iterator. - Elf_Sym_Iter() : EntitySize(0), Current(0, false) {} - Elf_Sym_Iter(uintX_t EntSize, const char *Start, bool IsDynamic) - : EntitySize(EntSize), Current(Start, IsDynamic) {} - - reference operator*() { - assert(Current.getPointer() && - "Attempted to dereference an invalid iterator!"); - return *reinterpret_cast<pointer>(Current.getPointer()); - } - - pointer operator->() { - assert(Current.getPointer() && - "Attempted to dereference an invalid iterator!"); - return reinterpret_cast<pointer>(Current.getPointer()); - } - - bool operator==(const Elf_Sym_Iter &Other) { - return Current == Other.Current; - } - - bool operator!=(const Elf_Sym_Iter &Other) { return !(*this == Other); } - - Elf_Sym_Iter &operator++() { - assert(Current.getPointer() && - "Attempted to increment an invalid iterator!"); - Current.setPointer(Current.getPointer() + EntitySize); - return *this; - } - - Elf_Sym_Iter operator++(int) { - Elf_Sym_Iter Tmp = *this; - ++*this; - return Tmp; - } - - Elf_Sym_Iter operator+(difference_type Dist) { - assert(Current.getPointer() && - "Attempted to increment an invalid iterator!"); - Current.setPointer(Current.getPointer() + EntitySize * Dist); - return *this; - } - - difference_type operator-(const Elf_Sym_Iter &Other) const { - assert(EntitySize == Other.EntitySize && - "Subtracting iterators of different EntitySize!"); - return (Current.getPointer() - Other.Current.getPointer()) / EntitySize; - } - - const char *get() const { return Current.getPointer(); } - - bool isDynamic() const { return Current.getInt(); } - - uintX_t getEntSize() const { return EntitySize; } - - private: - uintX_t EntitySize; - PointerIntPair<const char *, 1, bool, - ArchivePointerTypeTraits<const char> > Current; - }; + typedef iterator_range<const Elf_Sym *> Elf_Sym_Range; private: typedef SmallVector<const Elf_Shdr *, 2> Sections_t; @@ -238,17 +170,19 @@ private: } const Elf_Ehdr *Header; - const Elf_Shdr *SectionHeaderTable; - const Elf_Shdr *dot_shstrtab_sec; // Section header string table. - const Elf_Shdr *dot_strtab_sec; // Symbol header string table. - const Elf_Shdr *dot_symtab_sec; // Symbol table section. - - const Elf_Shdr *SymbolTableSectionHeaderIndex; + const Elf_Shdr *SectionHeaderTable = nullptr; + StringRef DotShstrtab; // Section header string table. + StringRef DotStrtab; // Symbol header string table. + const Elf_Shdr *dot_symtab_sec = nullptr; // Symbol table section. + StringRef DynSymStrTab; // Dynnamic symbol string table. + const Elf_Shdr *DotDynSymSec = nullptr; // Dynamic symbol table section. + + const Elf_Shdr *SymbolTableSectionHeaderIndex = nullptr; DenseMap<const Elf_Sym *, ELF::Elf64_Word> ExtendedSymbolTable; - const Elf_Shdr *dot_gnu_version_sec; // .gnu.version - const Elf_Shdr *dot_gnu_version_r_sec; // .gnu.version_r - const Elf_Shdr *dot_gnu_version_d_sec; // .gnu.version_d + const Elf_Shdr *dot_gnu_version_sec = nullptr; // .gnu.version + const Elf_Shdr *dot_gnu_version_r_sec = nullptr; // .gnu.version_r + const Elf_Shdr *dot_gnu_version_d_sec = nullptr; // .gnu.version_d /// \brief Represents a region described by entries in the .dynamic table. struct DynRegionInfo { @@ -263,12 +197,11 @@ private: DynRegionInfo DynamicRegion; DynRegionInfo DynHashRegion; - DynRegionInfo DynStrRegion; - DynRegionInfo DynSymRegion; + DynRegionInfo DynRelaRegion; // Pointer to SONAME entry in dynamic string table // This is set the first time getLoadName is called. - mutable const char *dt_soname; + mutable const char *dt_soname = nullptr; // Records for each version index the corresponding Verdef or Vernaux entry. // This is filled the first time LoadVersionMap() is called. @@ -301,8 +234,11 @@ public: const T *getEntry(uint32_t Section, uint32_t Entry) const; template <typename T> const T *getEntry(const Elf_Shdr *Section, uint32_t Entry) const; - const char *getString(uint32_t section, uint32_t offset) const; - const char *getString(const Elf_Shdr *section, uint32_t offset) const; + + const Elf_Shdr *getDotSymtabSec() const { return dot_symtab_sec; } + const Elf_Shdr *getDotDynSymSec() const { return DotDynSymSec; } + + ErrorOr<StringRef> getStringTable(const Elf_Shdr *Section) const; const char *getDynamicString(uintX_t Offset) const; ErrorOr<StringRef> getSymbolVersion(const Elf_Shdr *section, const Elf_Sym *Symb, @@ -331,55 +267,77 @@ public: Header->getDataEncoding() == ELF::ELFDATA2LSB; } - Elf_Shdr_Iter begin_sections() const; - Elf_Shdr_Iter end_sections() const; + const Elf_Shdr *section_begin() const; + const Elf_Shdr *section_end() const; Elf_Shdr_Range sections() const { - return make_range(begin_sections(), end_sections()); + return make_range(section_begin(), section_end()); } - Elf_Sym_Iter begin_symbols() const; - Elf_Sym_Iter end_symbols() const; + const Elf_Sym *symbol_begin() const; + const Elf_Sym *symbol_end() const; + Elf_Sym_Range symbols() const { + return make_range(symbol_begin(), symbol_end()); + } - Elf_Dyn_Iter begin_dynamic_table() const; + Elf_Dyn_Iter dynamic_table_begin() const; /// \param NULLEnd use one past the first DT_NULL entry as the end instead of /// the section size. - Elf_Dyn_Iter end_dynamic_table(bool NULLEnd = false) const; + Elf_Dyn_Iter dynamic_table_end(bool NULLEnd = false) const; Elf_Dyn_Range dynamic_table(bool NULLEnd = false) const { - return make_range(begin_dynamic_table(), end_dynamic_table(NULLEnd)); + return make_range(dynamic_table_begin(), dynamic_table_end(NULLEnd)); + } + + const Elf_Sym *dynamic_symbol_begin() const { + if (!DotDynSymSec) + return nullptr; + if (DotDynSymSec->sh_entsize != sizeof(Elf_Sym)) + report_fatal_error("Invalid symbol size"); + return reinterpret_cast<const Elf_Sym *>(base() + DotDynSymSec->sh_offset); + } + + const Elf_Sym *dynamic_symbol_end() const { + if (!DotDynSymSec) + return nullptr; + return reinterpret_cast<const Elf_Sym *>(base() + DotDynSymSec->sh_offset + + DotDynSymSec->sh_size); } - Elf_Sym_Iter begin_dynamic_symbols() const { - if (DynSymRegion.Addr) - return Elf_Sym_Iter(DynSymRegion.EntSize, (const char *)DynSymRegion.Addr, - true); - return Elf_Sym_Iter(0, nullptr, true); + Elf_Sym_Range dynamic_symbols() const { + return make_range(dynamic_symbol_begin(), dynamic_symbol_end()); } - Elf_Sym_Iter end_dynamic_symbols() const { - if (DynSymRegion.Addr) - return Elf_Sym_Iter(DynSymRegion.EntSize, - (const char *)DynSymRegion.Addr + DynSymRegion.Size, - true); - return Elf_Sym_Iter(0, nullptr, true); + Elf_Rela_Iter dyn_rela_begin() const { + if (DynRelaRegion.Addr) + return Elf_Rela_Iter(DynRelaRegion.EntSize, + (const char *)DynRelaRegion.Addr); + return Elf_Rela_Iter(0, nullptr); } - Elf_Rela_Iter begin_rela(const Elf_Shdr *sec) const { + Elf_Rela_Iter dyn_rela_end() const { + if (DynRelaRegion.Addr) + return Elf_Rela_Iter( + DynRelaRegion.EntSize, + (const char *)DynRelaRegion.Addr + DynRelaRegion.Size); + return Elf_Rela_Iter(0, nullptr); + } + + Elf_Rela_Iter rela_begin(const Elf_Shdr *sec) const { return Elf_Rela_Iter(sec->sh_entsize, (const char *)(base() + sec->sh_offset)); } - Elf_Rela_Iter end_rela(const Elf_Shdr *sec) const { + Elf_Rela_Iter rela_end(const Elf_Shdr *sec) const { return Elf_Rela_Iter( sec->sh_entsize, (const char *)(base() + sec->sh_offset + sec->sh_size)); } - Elf_Rel_Iter begin_rel(const Elf_Shdr *sec) const { + Elf_Rel_Iter rel_begin(const Elf_Shdr *sec) const { return Elf_Rel_Iter(sec->sh_entsize, (const char *)(base() + sec->sh_offset)); } - Elf_Rel_Iter end_rel(const Elf_Shdr *sec) const { + Elf_Rel_Iter rel_end(const Elf_Shdr *sec) const { return Elf_Rel_Iter(sec->sh_entsize, (const char *)(base() + sec->sh_offset + sec->sh_size)); } @@ -387,12 +345,12 @@ public: /// \brief Iterate over program header table. typedef ELFEntityIterator<const Elf_Phdr> Elf_Phdr_Iter; - Elf_Phdr_Iter begin_program_headers() const { + Elf_Phdr_Iter program_header_begin() const { return Elf_Phdr_Iter(Header->e_phentsize, (const char*)base() + Header->e_phoff); } - Elf_Phdr_Iter end_program_headers() const { + Elf_Phdr_Iter program_header_end() const { return Elf_Phdr_Iter(Header->e_phentsize, (const char*)base() + Header->e_phoff + @@ -401,24 +359,17 @@ public: uint64_t getNumSections() const; uintX_t getStringTableIndex() const; - ELF::Elf64_Word getSymbolTableIndex(const Elf_Sym *symb) const; + ELF::Elf64_Word getExtendedSymbolTableIndex(const Elf_Sym *symb) const; const Elf_Ehdr *getHeader() const { return Header; } - const Elf_Shdr *getSection(const Elf_Sym *symb) const; - const Elf_Shdr *getSection(uint32_t Index) const; + ErrorOr<const Elf_Shdr *> getSection(const Elf_Sym *symb) const; + ErrorOr<const Elf_Shdr *> getSection(uint32_t Index) const; const Elf_Sym *getSymbol(uint32_t index) const; - ErrorOr<StringRef> getSymbolName(Elf_Sym_Iter Sym) const; + ErrorOr<StringRef> getStaticSymbolName(const Elf_Sym *Symb) const; + ErrorOr<StringRef> getDynamicSymbolName(const Elf_Sym *Symb) const; + ErrorOr<StringRef> getSymbolName(const Elf_Sym *Symb, bool IsDynamic) const; - /// \brief Get the name of \p Symb. - /// \param SymTab The symbol table section \p Symb is contained in. - /// \param Symb The symbol to get the name of. - /// - /// \p SymTab is used to lookup the string table to use to get the symbol's - /// name. - ErrorOr<StringRef> getSymbolName(const Elf_Shdr *SymTab, - const Elf_Sym *Symb) const; ErrorOr<StringRef> getSectionName(const Elf_Shdr *Section) const; - uint64_t getSymbolIndex(const Elf_Sym *sym) const; ErrorOr<ArrayRef<uint8_t> > getSectionContents(const Elf_Shdr *Sec) const; StringRef getLoadName() const; }; @@ -490,7 +441,7 @@ void ELFFile<ELFT>::LoadVersionNeeds(const Elf_Shdr *sec) const { template <class ELFT> void ELFFile<ELFT>::LoadVersionMap() const { // If there is no dynamic symtab or version table, there is nothing to do. - if (!DynSymRegion.Addr || !dot_gnu_version_sec) + if (!DotDynSymSec || !dot_gnu_version_sec) return; // Has the VersionMap already been loaded? @@ -510,18 +461,19 @@ void ELFFile<ELFT>::LoadVersionMap() const { } template <class ELFT> -ELF::Elf64_Word ELFFile<ELFT>::getSymbolTableIndex(const Elf_Sym *symb) const { - if (symb->st_shndx == ELF::SHN_XINDEX) - return ExtendedSymbolTable.lookup(symb); - return symb->st_shndx; +ELF::Elf64_Word +ELFFile<ELFT>::getExtendedSymbolTableIndex(const Elf_Sym *symb) const { + assert(symb->st_shndx == ELF::SHN_XINDEX); + return ExtendedSymbolTable.lookup(symb); } template <class ELFT> -const typename ELFFile<ELFT>::Elf_Shdr * +ErrorOr<const typename ELFFile<ELFT>::Elf_Shdr *> ELFFile<ELFT>::getSection(const Elf_Sym *symb) const { - if (symb->st_shndx == ELF::SHN_XINDEX) + uint32_t Index = symb->st_shndx; + if (Index == ELF::SHN_XINDEX) return getSection(ExtendedSymbolTable.lookup(symb)); - if (symb->st_shndx >= ELF::SHN_LORESERVE) + if (Index == ELF::SHN_UNDEF || Index >= ELF::SHN_LORESERVE) return nullptr; return getSection(symb->st_shndx); } @@ -529,7 +481,7 @@ ELFFile<ELFT>::getSection(const Elf_Sym *symb) const { template <class ELFT> const typename ELFFile<ELFT>::Elf_Sym * ELFFile<ELFT>::getSymbol(uint32_t Index) const { - return &*(begin_symbols() + Index); + return &*(symbol_begin() + Index); } template <class ELFT> @@ -584,20 +536,14 @@ std::pair<const typename ELFFile<ELFT>::Elf_Shdr *, ELFFile<ELFT>::getRelocationSymbol(const Elf_Shdr *Sec, const RelT *Rel) const { if (!Sec->sh_link) return std::make_pair(nullptr, nullptr); - const Elf_Shdr *SymTable = getSection(Sec->sh_link); + ErrorOr<const Elf_Shdr *> SymTableOrErr = getSection(Sec->sh_link); + if (std::error_code EC = SymTableOrErr.getError()) + report_fatal_error(EC.message()); + const Elf_Shdr *SymTable = *SymTableOrErr; return std::make_pair( SymTable, getEntry<Elf_Sym>(SymTable, Rel->getSymbol(isMips64EL()))); } -// Verify that the last byte in the string table in a null. -template <class ELFT> -void ELFFile<ELFT>::VerifyStrTab(const Elf_Shdr *sh) const { - const char *strtab = (const char *)base() + sh->sh_offset; - if (strtab[sh->sh_size - 1] != 0) - // FIXME: Proper error handling. - report_fatal_error("String table must end with a null terminator!"); -} - template <class ELFT> uint64_t ELFFile<ELFT>::getNumSections() const { assert(Header && "Header not initialized!"); @@ -621,11 +567,7 @@ typename ELFFile<ELFT>::uintX_t ELFFile<ELFT>::getStringTableIndex() const { template <class ELFT> ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC) - : Buf(Object), SectionHeaderTable(nullptr), dot_shstrtab_sec(nullptr), - dot_strtab_sec(nullptr), dot_symtab_sec(nullptr), - SymbolTableSectionHeaderIndex(nullptr), dot_gnu_version_sec(nullptr), - dot_gnu_version_r_sec(nullptr), dot_gnu_version_d_sec(nullptr), - dt_soname(nullptr) { + : Buf(Object) { const uint64_t FileSize = Buf.size(); if (sizeof(Elf_Ehdr) > FileSize) { @@ -670,28 +612,35 @@ ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC) } SymbolTableSectionHeaderIndex = &Sec; break; - case ELF::SHT_SYMTAB: + case ELF::SHT_SYMTAB: { if (dot_symtab_sec) { // More than one .symtab! EC = object_error::parse_failed; return; } dot_symtab_sec = &Sec; - dot_strtab_sec = getSection(Sec.sh_link); - break; + ErrorOr<const Elf_Shdr *> SectionOrErr = getSection(Sec.sh_link); + if ((EC = SectionOrErr.getError())) + return; + ErrorOr<StringRef> SymtabOrErr = getStringTable(*SectionOrErr); + if ((EC = SymtabOrErr.getError())) + return; + DotStrtab = *SymtabOrErr; + } break; case ELF::SHT_DYNSYM: { - if (DynSymRegion.Addr) { + if (DotDynSymSec) { // More than one .dynsym! EC = object_error::parse_failed; return; } - DynSymRegion.Addr = base() + Sec.sh_offset; - DynSymRegion.Size = Sec.sh_size; - DynSymRegion.EntSize = Sec.sh_entsize; - const Elf_Shdr *DynStr = getSection(Sec.sh_link); - DynStrRegion.Addr = base() + DynStr->sh_offset; - DynStrRegion.Size = DynStr->sh_size; - DynStrRegion.EntSize = DynStr->sh_entsize; + DotDynSymSec = &Sec; + ErrorOr<const Elf_Shdr *> SectionOrErr = getSection(Sec.sh_link); + if ((EC = SectionOrErr.getError())) + return; + ErrorOr<StringRef> SymtabOrErr = getStringTable(*SectionOrErr); + if ((EC = SymtabOrErr.getError())) + return; + DynSymStrTab = *SymtabOrErr; break; } case ELF::SHT_DYNAMIC: @@ -732,27 +681,29 @@ ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC) } // Get string table sections. - dot_shstrtab_sec = getSection(getStringTableIndex()); - if (dot_shstrtab_sec) { - // Verify that the last byte in the string table in a null. - VerifyStrTab(dot_shstrtab_sec); - } + ErrorOr<const Elf_Shdr *> StrTabSecOrErr = getSection(getStringTableIndex()); + if ((EC = StrTabSecOrErr.getError())) + return; + + ErrorOr<StringRef> SymtabOrErr = getStringTable(*StrTabSecOrErr); + if ((EC = SymtabOrErr.getError())) + return; + DotShstrtab = *SymtabOrErr; // Build symbol name side-mapping if there is one. if (SymbolTableSectionHeaderIndex) { const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() + SymbolTableSectionHeaderIndex->sh_offset); - for (Elf_Sym_Iter SI = begin_symbols(), SE = end_symbols(); SI != SE; - ++SI) { + for (const Elf_Sym &S : symbols()) { if (*ShndxTable != ELF::SHN_UNDEF) - ExtendedSymbolTable[&*SI] = *ShndxTable; + ExtendedSymbolTable[&S] = *ShndxTable; ++ShndxTable; } } // Scan program headers. - for (Elf_Phdr_Iter PhdrI = begin_program_headers(), - PhdrE = end_program_headers(); + for (Elf_Phdr_Iter PhdrI = program_header_begin(), + PhdrE = program_header_end(); PhdrI != PhdrE; ++PhdrI) { if (PhdrI->p_type == ELF::PT_DYNAMIC) { DynamicRegion.Addr = base() + PhdrI->p_offset; @@ -762,55 +713,74 @@ ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC) } } - EC = std::error_code(); -} + // Scan dynamic table. + for (Elf_Dyn_Iter DynI = dynamic_table_begin(), DynE = dynamic_table_end(); + DynI != DynE; ++DynI) { + switch (DynI->d_tag) { + case ELF::DT_RELA: { + uint64_t VBase = 0; + const uint8_t *FBase = nullptr; + for (Elf_Phdr_Iter PhdrI = program_header_begin(), + PhdrE = program_header_end(); + PhdrI != PhdrE; ++PhdrI) { + if (PhdrI->p_type != ELF::PT_LOAD) + continue; + if (DynI->getPtr() >= PhdrI->p_vaddr && + DynI->getPtr() < PhdrI->p_vaddr + PhdrI->p_memsz) { + VBase = PhdrI->p_vaddr; + FBase = base() + PhdrI->p_offset; + break; + } + } + if (!VBase) + return; + DynRelaRegion.Addr = FBase + DynI->getPtr() - VBase; + break; + } + case ELF::DT_RELASZ: + DynRelaRegion.Size = DynI->getVal(); + break; + case ELF::DT_RELAENT: + DynRelaRegion.EntSize = DynI->getVal(); + } + } -// Get the symbol table index in the symtab section given a symbol -template <class ELFT> -uint64_t ELFFile<ELFT>::getSymbolIndex(const Elf_Sym *Sym) const { - uintptr_t SymLoc = uintptr_t(Sym); - uintptr_t SymTabLoc = uintptr_t(base() + dot_symtab_sec->sh_offset); - assert(SymLoc > SymTabLoc && "Symbol not in symbol table!"); - uint64_t SymOffset = SymLoc - SymTabLoc; - assert(SymOffset % dot_symtab_sec->sh_entsize == 0 && - "Symbol not multiple of symbol size!"); - return SymOffset / dot_symtab_sec->sh_entsize; + EC = std::error_code(); } template <class ELFT> -typename ELFFile<ELFT>::Elf_Shdr_Iter ELFFile<ELFT>::begin_sections() const { - return Elf_Shdr_Iter(Header->e_shentsize, - (const char *)base() + Header->e_shoff); +const typename ELFFile<ELFT>::Elf_Shdr *ELFFile<ELFT>::section_begin() const { + if (Header->e_shentsize != sizeof(Elf_Shdr)) + report_fatal_error( + "Invalid section header entry size (e_shentsize) in ELF header"); + return reinterpret_cast<const Elf_Shdr *>(base() + Header->e_shoff); } template <class ELFT> -typename ELFFile<ELFT>::Elf_Shdr_Iter ELFFile<ELFT>::end_sections() const { - return Elf_Shdr_Iter(Header->e_shentsize, - (const char *)base() + Header->e_shoff + - (getNumSections() * Header->e_shentsize)); +const typename ELFFile<ELFT>::Elf_Shdr *ELFFile<ELFT>::section_end() const { + return section_begin() + getNumSections(); } template <class ELFT> -typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::begin_symbols() const { +const typename ELFFile<ELFT>::Elf_Sym *ELFFile<ELFT>::symbol_begin() const { if (!dot_symtab_sec) - return Elf_Sym_Iter(0, nullptr, false); - return Elf_Sym_Iter(dot_symtab_sec->sh_entsize, - (const char *)base() + dot_symtab_sec->sh_offset, false); + return nullptr; + if (dot_symtab_sec->sh_entsize != sizeof(Elf_Sym)) + report_fatal_error("Invalid symbol size"); + return reinterpret_cast<const Elf_Sym *>(base() + dot_symtab_sec->sh_offset); } template <class ELFT> -typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::end_symbols() const { +const typename ELFFile<ELFT>::Elf_Sym *ELFFile<ELFT>::symbol_end() const { if (!dot_symtab_sec) - return Elf_Sym_Iter(0, nullptr, false); - return Elf_Sym_Iter(dot_symtab_sec->sh_entsize, - (const char *)base() + dot_symtab_sec->sh_offset + - dot_symtab_sec->sh_size, - false); + return nullptr; + return reinterpret_cast<const Elf_Sym *>(base() + dot_symtab_sec->sh_offset + + dot_symtab_sec->sh_size); } template <class ELFT> typename ELFFile<ELFT>::Elf_Dyn_Iter -ELFFile<ELFT>::begin_dynamic_table() const { +ELFFile<ELFT>::dynamic_table_begin() const { if (DynamicRegion.Addr) return Elf_Dyn_Iter(DynamicRegion.EntSize, (const char *)DynamicRegion.Addr); @@ -819,14 +789,14 @@ ELFFile<ELFT>::begin_dynamic_table() const { template <class ELFT> typename ELFFile<ELFT>::Elf_Dyn_Iter -ELFFile<ELFT>::end_dynamic_table(bool NULLEnd) const { +ELFFile<ELFT>::dynamic_table_end(bool NULLEnd) const { if (!DynamicRegion.Addr) return Elf_Dyn_Iter(0, nullptr); Elf_Dyn_Iter Ret(DynamicRegion.EntSize, (const char *)DynamicRegion.Addr + DynamicRegion.Size); if (NULLEnd) { - Elf_Dyn_Iter Start = begin_dynamic_table(); + Elf_Dyn_Iter Start = dynamic_table_begin(); while (Start != Ret && Start->getTag() != ELF::DT_NULL) ++Start; @@ -855,7 +825,10 @@ StringRef ELFFile<ELFT>::getLoadName() const { template <class ELFT> template <typename T> const T *ELFFile<ELFT>::getEntry(uint32_t Section, uint32_t Entry) const { - return getEntry<T>(getSection(Section), Entry); + ErrorOr<const Elf_Shdr *> Sec = getSection(Section); + if (std::error_code EC = Sec.getError()) + report_fatal_error(EC.message()); + return getEntry<T>(*Sec, Entry); } template <class ELFT> @@ -867,82 +840,85 @@ const T *ELFFile<ELFT>::getEntry(const Elf_Shdr *Section, } template <class ELFT> -const typename ELFFile<ELFT>::Elf_Shdr * -ELFFile<ELFT>::getSection(uint32_t index) const { - if (index == 0) - return nullptr; - if (!SectionHeaderTable || index >= getNumSections()) - // FIXME: Proper error handling. - report_fatal_error("Invalid section index!"); +ErrorOr<const typename ELFFile<ELFT>::Elf_Shdr *> +ELFFile<ELFT>::getSection(uint32_t Index) const { + assert(SectionHeaderTable && "SectionHeaderTable not initialized!"); + if (Index >= getNumSections()) + return object_error::invalid_section_index; return reinterpret_cast<const Elf_Shdr *>( - reinterpret_cast<const char *>(SectionHeaderTable) - + (index * Header->e_shentsize)); + reinterpret_cast<const char *>(SectionHeaderTable) + + (Index * Header->e_shentsize)); } template <class ELFT> -const char *ELFFile<ELFT>::getString(uint32_t section, - ELF::Elf32_Word offset) const { - return getString(getSection(section), offset); -} - -template <class ELFT> -const char *ELFFile<ELFT>::getString(const Elf_Shdr *section, - ELF::Elf32_Word offset) const { - assert(section && section->sh_type == ELF::SHT_STRTAB && "Invalid section!"); - if (offset >= section->sh_size) - // FIXME: Proper error handling. - report_fatal_error("Symbol name offset outside of string table!"); - return (const char *)base() + section->sh_offset + offset; +ErrorOr<StringRef> +ELFFile<ELFT>::getStringTable(const Elf_Shdr *Section) const { + if (Section->sh_type != ELF::SHT_STRTAB) + return object_error::parse_failed; + uint64_t Offset = Section->sh_offset; + uint64_t Size = Section->sh_size; + if (Offset + Size > Buf.size()) + return object_error::parse_failed; + StringRef Data((const char *)base() + Section->sh_offset, Size); + if (Data[Size - 1] != '\0') + return object_error::string_table_non_null_end; + return Data; } template <class ELFT> const char *ELFFile<ELFT>::getDynamicString(uintX_t Offset) const { - if (!DynStrRegion.Addr || Offset >= DynStrRegion.Size) + if (!DotDynSymSec || Offset >= DynSymStrTab.size()) return nullptr; - return (const char *)DynStrRegion.Addr + Offset; + return (const char *)DynSymStrTab.begin() + Offset; } template <class ELFT> -ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(Elf_Sym_Iter Sym) const { - if (!Sym.isDynamic()) - return getSymbolName(dot_symtab_sec, &*Sym); - - if (!DynStrRegion.Addr || Sym->st_name >= DynStrRegion.Size) - return object_error::parse_failed; - return StringRef(getDynamicString(Sym->st_name)); +ErrorOr<StringRef> +ELFFile<ELFT>::getStaticSymbolName(const Elf_Sym *Symb) const { + return Symb->getName(DotStrtab); } template <class ELFT> -ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Shdr *Section, - const Elf_Sym *Symb) const { - if (Symb->st_name == 0) - return StringRef(""); +ErrorOr<StringRef> +ELFFile<ELFT>::getDynamicSymbolName(const Elf_Sym *Symb) const { + return StringRef(getDynamicString(Symb->st_name)); +} - const Elf_Shdr *StrTab = getSection(Section->sh_link); - if (Symb->st_name >= StrTab->sh_size) - return object_error::parse_failed; - return StringRef(getString(StrTab, Symb->st_name)); +template <class ELFT> +ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Sym *Symb, + bool IsDynamic) const { + if (IsDynamic) + return getDynamicSymbolName(Symb); + return getStaticSymbolName(Symb); } template <class ELFT> ErrorOr<StringRef> ELFFile<ELFT>::getSectionName(const Elf_Shdr *Section) const { - if (Section->sh_name >= dot_shstrtab_sec->sh_size) + uint32_t Offset = Section->sh_name; + if (Offset >= DotShstrtab.size()) return object_error::parse_failed; - return StringRef(getString(dot_shstrtab_sec, Section->sh_name)); + return StringRef(DotShstrtab.data() + Offset); } template <class ELFT> ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Shdr *section, const Elf_Sym *symb, bool &IsDefault) const { + StringRef StrTab; + if (section) { + ErrorOr<StringRef> StrTabOrErr = getStringTable(section); + if (std::error_code EC = StrTabOrErr.getError()) + return EC; + StrTab = *StrTabOrErr; + } // Handle non-dynamic symbols. - if (section != DynSymRegion.Addr && section != nullptr) { + if (section != DotDynSymSec && section != nullptr) { // Non-dynamic symbols can have versions in their names // A name of the form 'foo@V1' indicates version 'V1', non-default. // A name of the form 'foo@@V2' indicates version 'V2', default version. - ErrorOr<StringRef> SymName = getSymbolName(section, symb); + ErrorOr<StringRef> SymName = symb->getName(StrTab); if (!SymName) return SymName; StringRef Name = *SymName; @@ -969,8 +945,10 @@ ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Shdr *section, } // Determine the position in the symbol table of this entry. - size_t entry_index = ((const char *)symb - (const char *)DynSymRegion.Addr) / - DynSymRegion.EntSize; + size_t entry_index = + (reinterpret_cast<uintptr_t>(symb) - DotDynSymSec->sh_offset - + reinterpret_cast<uintptr_t>(base())) / + sizeof(Elf_Sym); // Get the corresponding version index entry const Elf_Versym *vs = getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index); @@ -1005,7 +983,7 @@ ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Shdr *section, IsDefault = false; } - if (name_offset >= DynStrRegion.Size) + if (name_offset >= DynSymStrTab.size()) return object_error::parse_failed; return StringRef(getDynamicString(name_offset)); } diff --git a/include/llvm/Object/ELFObjectFile.h b/include/llvm/Object/ELFObjectFile.h index 7fc56ad..5b9b113 100644 --- a/include/llvm/Object/ELFObjectFile.h +++ b/include/llvm/Object/ELFObjectFile.h @@ -35,27 +35,148 @@ namespace llvm { namespace object { +class elf_symbol_iterator; +class ELFSymbolRef; +class ELFRelocationRef; + class ELFObjectFileBase : public ObjectFile { + friend class ELFSymbolRef; + friend class ELFSectionRef; + friend class ELFRelocationRef; + protected: ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source); -public: - virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0; + virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0; + virtual uint8_t getSymbolOther(DataRefImpl Symb) const = 0; + virtual uint8_t getSymbolELFType(DataRefImpl Symb) const = 0; - // FIXME: This is a bit of a hack. Every caller should know if it expecting - // and addend or not. - virtual bool hasRelocationAddend(DataRefImpl Rel) const = 0; + virtual uint32_t getSectionType(DataRefImpl Sec) const = 0; + virtual uint64_t getSectionFlags(DataRefImpl Sec) const = 0; - virtual std::pair<symbol_iterator, symbol_iterator> - getELFDynamicSymbolIterators() const = 0; + virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0; +public: - virtual uint64_t getSectionFlags(SectionRef Sec) const = 0; - virtual uint32_t getSectionType(SectionRef Sec) const = 0; + typedef iterator_range<elf_symbol_iterator> elf_symbol_iterator_range; + virtual elf_symbol_iterator_range getDynamicSymbolIterators() const = 0; + + elf_symbol_iterator_range symbols() const; static inline bool classof(const Binary *v) { return v->isELF(); } }; +class ELFSectionRef : public SectionRef { +public: + ELFSectionRef(const SectionRef &B) : SectionRef(B) { + assert(isa<ELFObjectFileBase>(SectionRef::getObject())); + } + + const ELFObjectFileBase *getObject() const { + return cast<ELFObjectFileBase>(SectionRef::getObject()); + } + + uint32_t getType() const { + return getObject()->getSectionType(getRawDataRefImpl()); + } + + uint64_t getFlags() const { + return getObject()->getSectionFlags(getRawDataRefImpl()); + } +}; + +class elf_section_iterator : public section_iterator { +public: + elf_section_iterator(const section_iterator &B) : section_iterator(B) { + assert(isa<ELFObjectFileBase>(B->getObject())); + } + + const ELFSectionRef *operator->() const { + return static_cast<const ELFSectionRef *>(section_iterator::operator->()); + } + + const ELFSectionRef &operator*() const { + return static_cast<const ELFSectionRef &>(section_iterator::operator*()); + } +}; + +class ELFSymbolRef : public SymbolRef { +public: + ELFSymbolRef(const SymbolRef &B) : SymbolRef(B) { + assert(isa<ELFObjectFileBase>(SymbolRef::getObject())); + } + + const ELFObjectFileBase *getObject() const { + return cast<ELFObjectFileBase>(BasicSymbolRef::getObject()); + } + + uint64_t getSize() const { + return getObject()->getSymbolSize(getRawDataRefImpl()); + } + + uint8_t getOther() const { + return getObject()->getSymbolOther(getRawDataRefImpl()); + } + + uint8_t getELFType() const { + return getObject()->getSymbolELFType(getRawDataRefImpl()); + } +}; + +class elf_symbol_iterator : public symbol_iterator { +public: + elf_symbol_iterator(const basic_symbol_iterator &B) + : symbol_iterator(SymbolRef(B->getRawDataRefImpl(), + cast<ELFObjectFileBase>(B->getObject()))) {} + + const ELFSymbolRef *operator->() const { + return static_cast<const ELFSymbolRef *>(symbol_iterator::operator->()); + } + + const ELFSymbolRef &operator*() const { + return static_cast<const ELFSymbolRef &>(symbol_iterator::operator*()); + } +}; + +class ELFRelocationRef : public RelocationRef { +public: + ELFRelocationRef(const RelocationRef &B) : RelocationRef(B) { + assert(isa<ELFObjectFileBase>(RelocationRef::getObject())); + } + + const ELFObjectFileBase *getObject() const { + return cast<ELFObjectFileBase>(RelocationRef::getObject()); + } + + ErrorOr<int64_t> getAddend() const { + return getObject()->getRelocationAddend(getRawDataRefImpl()); + } +}; + +class elf_relocation_iterator : public relocation_iterator { +public: + elf_relocation_iterator(const relocation_iterator &B) + : relocation_iterator(RelocationRef( + B->getRawDataRefImpl(), cast<ELFObjectFileBase>(B->getObject()))) {} + + const ELFRelocationRef *operator->() const { + return static_cast<const ELFRelocationRef *>( + relocation_iterator::operator->()); + } + + const ELFRelocationRef &operator*() const { + return static_cast<const ELFRelocationRef &>( + relocation_iterator::operator*()); + } +}; + +inline ELFObjectFileBase::elf_symbol_iterator_range +ELFObjectFileBase::symbols() const { + return elf_symbol_iterator_range(symbol_begin(), symbol_end()); +} + template <class ELFT> class ELFObjectFile : public ELFObjectFileBase { + uint64_t getSymbolSize(DataRefImpl Sym) const override; + public: LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) @@ -68,24 +189,22 @@ public: typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela; typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn; - typedef typename ELFFile<ELFT>::Elf_Sym_Iter Elf_Sym_Iter; - typedef typename ELFFile<ELFT>::Elf_Shdr_Iter Elf_Shdr_Iter; typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter; protected: ELFFile<ELFT> EF; void moveSymbolNext(DataRefImpl &Symb) const override; - std::error_code getSymbolName(DataRefImpl Symb, - StringRef &Res) const override; + ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override; std::error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const override; + uint64_t getSymbolValue(DataRefImpl Symb) const override; uint32_t getSymbolAlignment(DataRefImpl Symb) const override; - uint64_t getSymbolSize(DataRefImpl Symb) const override; + uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override; uint32_t getSymbolFlags(DataRefImpl Symb) const override; - std::error_code getSymbolOther(DataRefImpl Symb, uint8_t &Res) const override; - std::error_code getSymbolType(DataRefImpl Symb, - SymbolRef::Type &Res) const override; + uint8_t getSymbolOther(DataRefImpl Symb) const override; + uint8_t getSymbolELFType(DataRefImpl Symb) const override; + SymbolRef::Type getSymbolType(DataRefImpl Symb) const override; section_iterator getSymbolSection(const Elf_Sym *Symb) const; std::error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const override; @@ -102,62 +221,55 @@ protected: bool isSectionData(DataRefImpl Sec) const override; bool isSectionBSS(DataRefImpl Sec) const override; bool isSectionVirtual(DataRefImpl Sec) const override; - bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override; relocation_iterator section_rel_begin(DataRefImpl Sec) const override; relocation_iterator section_rel_end(DataRefImpl Sec) const override; section_iterator getRelocatedSection(DataRefImpl Sec) const override; void moveRelocationNext(DataRefImpl &Rel) const override; - std::error_code getRelocationAddress(DataRefImpl Rel, - uint64_t &Res) const override; - std::error_code getRelocationOffset(DataRefImpl Rel, - uint64_t &Res) const override; + ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override; + uint64_t getRelocationOffset(DataRefImpl Rel) const override; symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override; - std::error_code getRelocationType(DataRefImpl Rel, - uint64_t &Res) const override; - std::error_code - getRelocationTypeName(DataRefImpl Rel, - SmallVectorImpl<char> &Result) const override; + uint64_t getRelocationType(DataRefImpl Rel) const override; + void getRelocationTypeName(DataRefImpl Rel, + SmallVectorImpl<char> &Result) const override; + uint32_t getSectionType(DataRefImpl Sec) const override; + uint64_t getSectionFlags(DataRefImpl Sec) const override; uint64_t getROffset(DataRefImpl Rel) const; StringRef getRelocationTypeName(uint32_t Type) const; /// \brief Get the relocation section that contains \a Rel. const Elf_Shdr *getRelSection(DataRefImpl Rel) const { - return EF.getSection(Rel.d.a); + return *EF.getSection(Rel.d.a); } - const Elf_Rel *getRel(DataRefImpl Rel) const; - const Elf_Rela *getRela(DataRefImpl Rela) const; - - Elf_Sym_Iter toELFSymIter(DataRefImpl Symb) const { - bool IsDynamic = Symb.p & 1; - if (IsDynamic) - return Elf_Sym_Iter( - EF.begin_dynamic_symbols().getEntSize(), - reinterpret_cast<const char *>(Symb.p & ~uintptr_t(1)), IsDynamic); - return Elf_Sym_Iter(EF.begin_symbols().getEntSize(), - reinterpret_cast<const char *>(Symb.p), IsDynamic); + const Elf_Sym *toELFSymIter(DataRefImpl Sym) const { + return EF.template getEntry<Elf_Sym>(Sym.d.a, Sym.d.b); } - DataRefImpl toDRI(Elf_Sym_Iter Symb) const { + DataRefImpl toDRI(const Elf_Shdr *SymTable, unsigned SymbolNum) const { DataRefImpl DRI; - DRI.p = reinterpret_cast<uintptr_t>(Symb.get()) | - static_cast<uintptr_t>(Symb.isDynamic()); - return DRI; - } + if (!SymTable) { + DRI.d.a = 0; + DRI.d.b = 0; + return DRI; + } + assert(SymTable->sh_type == ELF::SHT_SYMTAB || + SymTable->sh_type == ELF::SHT_DYNSYM); - Elf_Shdr_Iter toELFShdrIter(DataRefImpl Sec) const { - return Elf_Shdr_Iter(EF.getHeader()->e_shentsize, - reinterpret_cast<const char *>(Sec.p)); - } + uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin()); + unsigned SymTableIndex = + (reinterpret_cast<uintptr_t>(SymTable) - SHT) / sizeof(Elf_Shdr); - DataRefImpl toDRI(Elf_Shdr_Iter Sec) const { - DataRefImpl DRI; - DRI.p = reinterpret_cast<uintptr_t>(Sec.get()); + DRI.d.a = SymTableIndex; + DRI.d.b = SymbolNum; return DRI; } + const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const { + return reinterpret_cast<const Elf_Shdr *>(Sec.p); + } + DataRefImpl toDRI(const Elf_Shdr *Sec) const { DataRefImpl DRI; DRI.p = reinterpret_cast<uintptr_t>(Sec); @@ -197,22 +309,21 @@ protected: public: ELFObjectFile(MemoryBufferRef Object, std::error_code &EC); + const Elf_Rel *getRel(DataRefImpl Rel) const; + const Elf_Rela *getRela(DataRefImpl Rela) const; + const Elf_Sym *getSymbol(DataRefImpl Symb) const; basic_symbol_iterator symbol_begin_impl() const override; basic_symbol_iterator symbol_end_impl() const override; - symbol_iterator dynamic_symbol_begin() const; - symbol_iterator dynamic_symbol_end() const; + elf_symbol_iterator dynamic_symbol_begin() const; + elf_symbol_iterator dynamic_symbol_end() const; section_iterator section_begin() const override; section_iterator section_end() const override; ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override; - bool hasRelocationAddend(DataRefImpl Rel) const override; - - uint64_t getSectionFlags(SectionRef Sec) const override; - uint32_t getSectionType(SectionRef Sec) const override; uint8_t getBytesInAddress() const override; StringRef getFileFormatName() const override; @@ -232,8 +343,7 @@ public: ELFT::Is64Bits); } - std::pair<symbol_iterator, symbol_iterator> - getELFDynamicSymbolIterators() const override; + elf_symbol_iterator_range getDynamicSymbolIterators() const override; bool isRelocatableObject() const override; }; @@ -244,59 +354,71 @@ typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile; typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile; template <class ELFT> -void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Symb) const { - Symb = toDRI(++toELFSymIter(Symb)); +void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const { + ++Sym.d.b; } template <class ELFT> -std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb, - StringRef &Result) const { - ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb)); - if (!Name) - return Name.getError(); - Result = *Name; - return std::error_code(); +ErrorOr<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const { + const Elf_Sym *ESym = toELFSymIter(Sym); + const Elf_Shdr *SymTableSec = *EF.getSection(Sym.d.a); + const Elf_Shdr *StringTableSec = *EF.getSection(SymTableSec->sh_link); + StringRef SymTable = *EF.getStringTable(StringTableSec); + return ESym->getName(SymTable); } template <class ELFT> -uint64_t ELFObjectFile<ELFT>::getSectionFlags(SectionRef Sec) const { - DataRefImpl DRI = Sec.getRawDataRefImpl(); - return toELFShdrIter(DRI)->sh_flags; +uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const { + return toELFShdrIter(Sec)->sh_flags; } template <class ELFT> -uint32_t ELFObjectFile<ELFT>::getSectionType(SectionRef Sec) const { - DataRefImpl DRI = Sec.getRawDataRefImpl(); - return toELFShdrIter(DRI)->sh_type; +uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const { + return toELFShdrIter(Sec)->sh_type; } template <class ELFT> -std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb, - uint64_t &Result) const { +uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const { const Elf_Sym *ESym = getSymbol(Symb); - switch (EF.getSymbolTableIndex(ESym)) { + switch (ESym->st_shndx) { case ELF::SHN_COMMON: case ELF::SHN_UNDEF: - Result = UnknownAddressOrSize; - return std::error_code(); + return UnknownAddress; case ELF::SHN_ABS: - Result = ESym->st_value; - return std::error_code(); - default: - break; + return ESym->st_value; } const Elf_Ehdr *Header = EF.getHeader(); - Result = ESym->st_value; + uint64_t Ret = ESym->st_value; // Clear the ARM/Thumb or microMIPS indicator flag. if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) && ESym->getType() == ELF::STT_FUNC) - Result &= ~1; + Ret &= ~1; + + return Ret; +} + +template <class ELFT> +std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb, + uint64_t &Result) const { + Result = getSymbolValue(Symb); + const Elf_Sym *ESym = getSymbol(Symb); + switch (ESym->st_shndx) { + case ELF::SHN_COMMON: + case ELF::SHN_UNDEF: + case ELF::SHN_ABS: + return std::error_code(); + } + + const Elf_Ehdr *Header = EF.getHeader(); if (Header->e_type == ELF::ET_REL) { - const typename ELFFile<ELFT>::Elf_Shdr * Section = EF.getSection(ESym); - if (Section != nullptr) + ErrorOr<const Elf_Shdr *> SectionOrErr = EF.getSection(ESym); + if (std::error_code EC = SectionOrErr.getError()) + return EC; + const Elf_Shdr *Section = *SectionOrErr; + if (Section) Result += Section->sh_addr; } @@ -305,59 +427,57 @@ std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb, template <class ELFT> uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const { - Elf_Sym_Iter Sym = toELFSymIter(Symb); + const Elf_Sym *Sym = toELFSymIter(Symb); if (Sym->st_shndx == ELF::SHN_COMMON) return Sym->st_value; return 0; } template <class ELFT> -uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Symb) const { +uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const { + return toELFSymIter(Sym)->st_size; +} + +template <class ELFT> +uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const { return toELFSymIter(Symb)->st_size; } template <class ELFT> -std::error_code ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb, - uint8_t &Result) const { - Result = toELFSymIter(Symb)->st_other; - return std::error_code(); +uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const { + return toELFSymIter(Symb)->st_other; } template <class ELFT> -std::error_code -ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb, - SymbolRef::Type &Result) const { +uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const { + return toELFSymIter(Symb)->getType(); +} + +template <class ELFT> +SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const { const Elf_Sym *ESym = getSymbol(Symb); switch (ESym->getType()) { case ELF::STT_NOTYPE: - Result = SymbolRef::ST_Unknown; - break; + return SymbolRef::ST_Unknown; case ELF::STT_SECTION: - Result = SymbolRef::ST_Debug; - break; + return SymbolRef::ST_Debug; case ELF::STT_FILE: - Result = SymbolRef::ST_File; - break; + return SymbolRef::ST_File; case ELF::STT_FUNC: - Result = SymbolRef::ST_Function; - break; + return SymbolRef::ST_Function; case ELF::STT_OBJECT: case ELF::STT_COMMON: case ELF::STT_TLS: - Result = SymbolRef::ST_Data; - break; + return SymbolRef::ST_Data; default: - Result = SymbolRef::ST_Other; - break; + return SymbolRef::ST_Other; } - return std::error_code(); } template <class ELFT> -uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const { - Elf_Sym_Iter EIter = toELFSymIter(Symb); - const Elf_Sym *ESym = &*EIter; +uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const { + const Elf_Sym *ESym = toELFSymIter(Sym); uint32_t Result = SymbolRef::SF_None; @@ -371,14 +491,22 @@ uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const { Result |= SymbolRef::SF_Absolute; if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION || - EIter == EF.begin_symbols() || EIter == EF.begin_dynamic_symbols()) + ESym == EF.symbol_begin() || ESym == EF.dynamic_symbol_begin()) Result |= SymbolRef::SF_FormatSpecific; - if (EF.getSymbolTableIndex(ESym) == ELF::SHN_UNDEF) + if (EF.getHeader()->e_machine == ELF::EM_ARM) { + if (ErrorOr<StringRef> NameOrErr = getSymbolName(Sym)) { + StringRef Name = *NameOrErr; + if (Name.startswith("$d") || Name.startswith("$t") || + Name.startswith("$a")) + Result |= SymbolRef::SF_FormatSpecific; + } + } + + if (ESym->st_shndx == ELF::SHN_UNDEF) Result |= SymbolRef::SF_Undefined; - if (ESym->getType() == ELF::STT_COMMON || - EF.getSymbolTableIndex(ESym) == ELF::SHN_COMMON) + if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON) Result |= SymbolRef::SF_Common; if (isExportedToOtherDSO(ESym)) @@ -393,14 +521,17 @@ uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const { template <class ELFT> section_iterator ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const { - const Elf_Shdr *ESec = EF.getSection(ESym); + ErrorOr<const Elf_Shdr *> ESecOrErr = EF.getSection(ESym); + if (std::error_code EC = ESecOrErr.getError()) + report_fatal_error(EC.message()); + + const Elf_Shdr *ESec = *ESecOrErr; if (!ESec) return section_end(); - else { - DataRefImpl Sec; - Sec.p = reinterpret_cast<intptr_t>(ESec); - return section_iterator(SectionRef(Sec, this)); - } + + DataRefImpl Sec; + Sec.p = reinterpret_cast<intptr_t>(ESec); + return section_iterator(SectionRef(Sec, this)); } template <class ELFT> @@ -413,7 +544,8 @@ ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb, template <class ELFT> void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const { - Sec = toDRI(++toELFShdrIter(Sec)); + const Elf_Shdr *ESec = toELFShdrIter(Sec); + Sec = toDRI(++ESec); } template <class ELFT> @@ -440,7 +572,7 @@ template <class ELFT> std::error_code ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec, StringRef &Result) const { - Elf_Shdr_Iter EShdr = toELFShdrIter(Sec); + const Elf_Shdr *EShdr = toELFShdrIter(Sec); Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size); return std::error_code(); } @@ -457,14 +589,14 @@ bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const { template <class ELFT> bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const { - Elf_Shdr_Iter EShdr = toELFShdrIter(Sec); + const Elf_Shdr *EShdr = toELFShdrIter(Sec); return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) && EShdr->sh_type == ELF::SHT_PROGBITS; } template <class ELFT> bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const { - Elf_Shdr_Iter EShdr = toELFShdrIter(Sec); + const Elf_Shdr *EShdr = toELFShdrIter(Sec); return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) && EShdr->sh_type == ELF::SHT_NOBITS; } @@ -475,38 +607,40 @@ bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const { } template <class ELFT> -bool ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec, - DataRefImpl Symb) const { - Elf_Sym_Iter ESym = toELFSymIter(Symb); - - uintX_t Index = ESym->st_shndx; - bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE; - - return !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx)); -} - -template <class ELFT> relocation_iterator ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const { DataRefImpl RelData; - uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get()); + uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin()); RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize; RelData.d.b = 0; + + const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p); + if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL) + return relocation_iterator(RelocationRef(RelData, this)); + + const Elf_Shdr *RelSec = getRelSection(RelData); + ErrorOr<const Elf_Shdr *> SymSecOrErr = EF.getSection(RelSec->sh_link); + if (std::error_code EC = SymSecOrErr.getError()) + report_fatal_error(EC.message()); + const Elf_Shdr *SymSec = *SymSecOrErr; + uint32_t SymSecType = SymSec->sh_type; + if (SymSecType != ELF::SHT_SYMTAB && SymSecType != ELF::SHT_DYNSYM) + report_fatal_error("Invalid symbol table section type!"); + if (SymSecType == ELF::SHT_DYNSYM) + RelData.d.b = 1; + return relocation_iterator(RelocationRef(RelData, this)); } template <class ELFT> relocation_iterator ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const { - DataRefImpl RelData; - uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get()); const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p); - RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize; + relocation_iterator Begin = section_rel_begin(Sec); if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL) - RelData.d.b = 0; - else - RelData.d.b = S->sh_size / S->sh_entsize; - + return Begin; + DataRefImpl RelData = Begin->getRawDataRefImpl(); + RelData.d.b += (S->sh_size / S->sh_entsize) << 1; return relocation_iterator(RelocationRef(RelData, this)); } @@ -516,19 +650,21 @@ ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const { if (EF.getHeader()->e_type != ELF::ET_REL) return section_end(); - Elf_Shdr_Iter EShdr = toELFShdrIter(Sec); + const Elf_Shdr *EShdr = toELFShdrIter(Sec); uintX_t Type = EShdr->sh_type; if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA) return section_end(); - const Elf_Shdr *R = EF.getSection(EShdr->sh_info); - return section_iterator(SectionRef(toDRI(R), this)); + ErrorOr<const Elf_Shdr *> R = EF.getSection(EShdr->sh_info); + if (std::error_code EC = R.getError()) + report_fatal_error(EC.message()); + return section_iterator(SectionRef(toDRI(*R), this)); } // Relocations template <class ELFT> void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const { - ++Rel.d.b; + Rel.d.b += 2; } template <class ELFT> @@ -536,96 +672,62 @@ symbol_iterator ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const { uint32_t symbolIdx; const Elf_Shdr *sec = getRelSection(Rel); - switch (sec->sh_type) { - default: - report_fatal_error("Invalid section type in Rel!"); - case ELF::SHT_REL: { + if (sec->sh_type == ELF::SHT_REL) symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL()); - break; - } - case ELF::SHT_RELA: { + else symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL()); - break; - } - } if (!symbolIdx) return symbol_end(); - const Elf_Shdr *SymSec = EF.getSection(sec->sh_link); - + bool IsDyn = Rel.d.b & 1; DataRefImpl SymbolData; - switch (SymSec->sh_type) { - default: - report_fatal_error("Invalid symbol table section type!"); - case ELF::SHT_SYMTAB: - SymbolData = toDRI(EF.begin_symbols() + symbolIdx); - break; - case ELF::SHT_DYNSYM: - SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx); - break; - } - + if (IsDyn) + SymbolData = toDRI(EF.getDotDynSymSec(), symbolIdx); + else + SymbolData = toDRI(EF.getDotSymtabSec(), symbolIdx); return symbol_iterator(SymbolRef(SymbolData, this)); } template <class ELFT> -std::error_code -ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel, - uint64_t &Result) const { +ErrorOr<uint64_t> +ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel) const { uint64_t ROffset = getROffset(Rel); const Elf_Ehdr *Header = EF.getHeader(); if (Header->e_type == ELF::ET_REL) { const Elf_Shdr *RelocationSec = getRelSection(Rel); - const Elf_Shdr *RelocatedSec = EF.getSection(RelocationSec->sh_info); - Result = ROffset + RelocatedSec->sh_addr; - } else { - Result = ROffset; + ErrorOr<const Elf_Shdr *> RelocatedSec = + EF.getSection(RelocationSec->sh_info); + if (std::error_code EC = RelocatedSec.getError()) + return EC; + return ROffset + (*RelocatedSec)->sh_addr; } - - return std::error_code(); + return ROffset; } template <class ELFT> -std::error_code -ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel, - uint64_t &Result) const { +uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const { assert(EF.getHeader()->e_type == ELF::ET_REL && "Only relocatable object files have relocation offsets"); - Result = getROffset(Rel); - return std::error_code(); + return getROffset(Rel); } template <class ELFT> uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const { const Elf_Shdr *sec = getRelSection(Rel); - switch (sec->sh_type) { - default: - report_fatal_error("Invalid section type in Rel!"); - case ELF::SHT_REL: + if (sec->sh_type == ELF::SHT_REL) return getRel(Rel)->r_offset; - case ELF::SHT_RELA: - return getRela(Rel)->r_offset; - } + + return getRela(Rel)->r_offset; } template <class ELFT> -std::error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel, - uint64_t &Result) const { +uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const { const Elf_Shdr *sec = getRelSection(Rel); - switch (sec->sh_type) { - default: - report_fatal_error("Invalid section type in Rel!"); - case ELF::SHT_REL: { - Result = getRel(Rel)->getType(EF.isMips64EL()); - break; - } - case ELF::SHT_RELA: { - Result = getRela(Rel)->getType(EF.isMips64EL()); - break; - } - } - return std::error_code(); + if (sec->sh_type == ELF::SHT_REL) + return getRel(Rel)->getType(EF.isMips64EL()); + else + return getRela(Rel)->getType(EF.isMips64EL()); } template <class ELFT> @@ -634,25 +736,10 @@ StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const { } template <class ELFT> -std::error_code ELFObjectFile<ELFT>::getRelocationTypeName( +void ELFObjectFile<ELFT>::getRelocationTypeName( DataRefImpl Rel, SmallVectorImpl<char> &Result) const { - const Elf_Shdr *sec = getRelSection(Rel); - uint32_t type; - switch (sec->sh_type) { - default: - return object_error::parse_failed; - case ELF::SHT_REL: { - type = getRel(Rel)->getType(EF.isMips64EL()); - break; - } - case ELF::SHT_RELA: { - type = getRela(Rel)->getType(EF.isMips64EL()); - break; - } - } - + uint32_t type = getRelocationType(Rel); EF.getRelocationTypeName(type, Result); - return std::error_code(); } template <class ELFT> @@ -664,11 +751,6 @@ ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const { } template <class ELFT> -bool ELFObjectFile<ELFT>::hasRelocationAddend(DataRefImpl Rel) const { - return getRelSection(Rel)->sh_type == ELF::SHT_RELA; -} - -template <class ELFT> const typename ELFFile<ELFT>::Elf_Sym * ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const { return &*toELFSymIter(Symb); @@ -677,13 +759,15 @@ ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const { template <class ELFT> const typename ELFObjectFile<ELFT>::Elf_Rel * ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const { - return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b); + assert(getRelSection(Rel)->sh_type == ELF::SHT_REL); + return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b >> 1); } template <class ELFT> const typename ELFObjectFile<ELFT>::Elf_Rela * ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const { - return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b); + assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA); + return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b >> 1); } template <class ELFT> @@ -697,38 +781,46 @@ ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC) template <class ELFT> basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const { - return basic_symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this)); + DataRefImpl Sym = toDRI(EF.getDotSymtabSec(), 0); + return basic_symbol_iterator(SymbolRef(Sym, this)); } template <class ELFT> basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const { - return basic_symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this)); + const Elf_Shdr *SymTab = EF.getDotSymtabSec(); + if (!SymTab) + return symbol_begin_impl(); + DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym)); + return basic_symbol_iterator(SymbolRef(Sym, this)); } template <class ELFT> -symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const { - return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this)); +elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const { + DataRefImpl Sym = toDRI(EF.getDotDynSymSec(), 0); + return symbol_iterator(SymbolRef(Sym, this)); } template <class ELFT> -symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const { - return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this)); +elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const { + const Elf_Shdr *SymTab = EF.getDotDynSymSec(); + DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym)); + return basic_symbol_iterator(SymbolRef(Sym, this)); } template <class ELFT> section_iterator ELFObjectFile<ELFT>::section_begin() const { - return section_iterator(SectionRef(toDRI(EF.begin_sections()), this)); + return section_iterator(SectionRef(toDRI(EF.section_begin()), this)); } template <class ELFT> section_iterator ELFObjectFile<ELFT>::section_end() const { - return section_iterator(SectionRef(toDRI(EF.end_sections()), this)); + return section_iterator(SectionRef(toDRI(EF.section_end()), this)); } template <class ELFT> StringRef ELFObjectFile<ELFT>::getLoadName() const { - Elf_Dyn_Iter DI = EF.begin_dynamic_table(); - Elf_Dyn_Iter DE = EF.end_dynamic_table(); + Elf_Dyn_Iter DI = EF.dynamic_table_begin(); + Elf_Dyn_Iter DE = EF.dynamic_table_end(); while (DI != DE && DI->getTag() != ELF::DT_SONAME) ++DI; @@ -834,21 +926,16 @@ unsigned ELFObjectFile<ELFT>::getArch() const { } template <class ELFT> -std::pair<symbol_iterator, symbol_iterator> -ELFObjectFile<ELFT>::getELFDynamicSymbolIterators() const { - return std::make_pair(dynamic_symbol_begin(), dynamic_symbol_end()); +ELFObjectFileBase::elf_symbol_iterator_range +ELFObjectFile<ELFT>::getDynamicSymbolIterators() const { + return make_range(dynamic_symbol_begin(), dynamic_symbol_end()); } template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const { return EF.getHeader()->e_type == ELF::ET_REL; } -inline std::pair<symbol_iterator, symbol_iterator> -getELFDynamicSymbolIterators(const SymbolicFile *Obj) { - return cast<ELFObjectFileBase>(Obj)->getELFDynamicSymbolIterators(); } - -} // namespace object -} // namespace llvm +} #endif diff --git a/include/llvm/Object/ELFTypes.h b/include/llvm/Object/ELFTypes.h index 2eda0c1..63e1390 100644 --- a/include/llvm/Object/ELFTypes.h +++ b/include/llvm/Object/ELFTypes.h @@ -10,9 +10,11 @@ #ifndef LLVM_OBJECT_ELFTYPES_H #define LLVM_OBJECT_ELFTYPES_H +#include "llvm/Object/Error.h" #include "llvm/Support/DataTypes.h" #include "llvm/Support/ELF.h" #include "llvm/Support/Endian.h" +#include "llvm/Support/ErrorOr.h" namespace llvm { namespace object { @@ -24,6 +26,11 @@ template <endianness target_endianness, bool is64Bits> struct ELFType { static const bool Is64Bits = is64Bits; }; +typedef ELFType<support::little, false> ELF32LE; +typedef ELFType<support::big, false> ELF32BE; +typedef ELFType<support::little, true> ELF64LE; +typedef ELFType<support::big, true> ELF64BE; + // Use an alignment of 2 for the typedefs since that is the worst case for // ELF files in archives. @@ -197,8 +204,21 @@ struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> { return st_shndx >= ELF::SHN_LORESERVE; } bool isUndefined() const { return st_shndx == ELF::SHN_UNDEF; } + bool isExternal() const { + return getBinding() != ELF::STB_LOCAL; + } + + ErrorOr<StringRef> getName(StringRef StrTab) const; }; +template <class ELFT> +ErrorOr<StringRef> Elf_Sym_Impl<ELFT>::getName(StringRef StrTab) const { + uint32_t Offset = this->st_name; + if (Offset >= StrTab.size()) + return object_error::parse_failed; + return StringRef(StrTab.data() + Offset); +} + /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section /// (.gnu.version). This structure is identical for ELF32 and ELF64. template <class ELFT> @@ -293,14 +313,14 @@ struct Elf_Dyn_Impl : Elf_Dyn_Base<ELFT> { using Elf_Dyn_Base<ELFT>::d_un; int64_t getTag() const { return d_tag; } uint64_t getVal() const { return d_un.d_val; } - uint64_t getPtr() const { return d_un.ptr; } + uint64_t getPtr() const { return d_un.d_ptr; } }; // Elf_Rel: Elf Relocation -template <class ELFT, bool isRela> struct Elf_Rel_Base; +template <class ELFT, bool isRela> struct Elf_Rel_Impl; template <endianness TargetEndianness> -struct Elf_Rel_Base<ELFType<TargetEndianness, false>, false> { +struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> { LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) Elf_Word r_info; // Symbol table index and type of relocation to apply @@ -313,64 +333,46 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, false>, false> { assert(!IsMips64EL); r_info = R; } -}; - -template <endianness TargetEndianness> -struct Elf_Rel_Base<ELFType<TargetEndianness, true>, false> { - LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) - Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) - Elf_Xword r_info; // Symbol table index and type of relocation to apply - uint64_t getRInfo(bool isMips64EL) const { - uint64_t t = r_info; - if (!isMips64EL) - return t; - // Mips64 little endian has a "special" encoding of r_info. Instead of one - // 64 bit little endian number, it is a little endian 32 bit number followed - // by a 32 bit big endian number. - return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) | - ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff); + // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, + // and ELF32_R_INFO macros defined in the ELF specification: + uint32_t getSymbol(bool isMips64EL) const { + return this->getRInfo(isMips64EL) >> 8; } - void setRInfo(uint64_t R, bool IsMips64EL) { - if (IsMips64EL) - r_info = (R >> 32) | ((R & 0xff000000) << 8) | ((R & 0x00ff0000) << 24) | - ((R & 0x0000ff00) << 40) | ((R & 0x000000ff) << 56); - else - r_info = R; + unsigned char getType(bool isMips64EL) const { + return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff); + } + void setSymbol(uint32_t s, bool IsMips64EL) { + setSymbolAndType(s, getType(), IsMips64EL); + } + void setType(unsigned char t, bool IsMips64EL) { + setSymbolAndType(getSymbol(), t, IsMips64EL); + } + void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) { + this->setRInfo((s << 8) + t, IsMips64EL); } }; template <endianness TargetEndianness> -struct Elf_Rel_Base<ELFType<TargetEndianness, false>, true> { +struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, true> + : public Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> { LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) - Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) - Elf_Word r_info; // Symbol table index and type of relocation to apply Elf_Sword r_addend; // Compute value for relocatable field by adding this - - uint32_t getRInfo(bool isMips64EL) const { - assert(!isMips64EL); - return r_info; - } - void setRInfo(uint32_t R, bool IsMips64EL) { - assert(!IsMips64EL); - r_info = R; - } }; template <endianness TargetEndianness> -struct Elf_Rel_Base<ELFType<TargetEndianness, true>, true> { +struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> { LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) - Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) - Elf_Xword r_info; // Symbol table index and type of relocation to apply - Elf_Sxword r_addend; // Compute value for relocatable field by adding this. + Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) + Elf_Xword r_info; // Symbol table index and type of relocation to apply uint64_t getRInfo(bool isMips64EL) const { - // Mips64 little endian has a "special" encoding of r_info. Instead of one - // 64 bit little endian number, it is a little endian 32 bit number followed - // by a 32 bit big endian number. uint64_t t = r_info; if (!isMips64EL) return t; + // Mips64 little endian has a "special" encoding of r_info. Instead of one + // 64 bit little endian number, it is a little endian 32 bit number followed + // by a 32 bit big endian number. return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) | ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff); } @@ -381,14 +383,6 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, true>, true> { else r_info = R; } -}; - -template <class ELFT, bool isRela> struct Elf_Rel_Impl; - -template <endianness TargetEndianness, bool isRela> -struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, isRela> - : Elf_Rel_Base<ELFType<TargetEndianness, true>, isRela> { - LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, // and ELF64_R_INFO macros defined in the ELF specification: @@ -409,28 +403,11 @@ struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, isRela> } }; -template <endianness TargetEndianness, bool isRela> -struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, isRela> - : Elf_Rel_Base<ELFType<TargetEndianness, false>, isRela> { - LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) - - // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, - // and ELF32_R_INFO macros defined in the ELF specification: - uint32_t getSymbol(bool isMips64EL) const { - return this->getRInfo(isMips64EL) >> 8; - } - unsigned char getType(bool isMips64EL) const { - return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff); - } - void setSymbol(uint32_t s, bool IsMips64EL) { - setSymbolAndType(s, getType(), IsMips64EL); - } - void setType(unsigned char t, bool IsMips64EL) { - setSymbolAndType(getSymbol(), t, IsMips64EL); - } - void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) { - this->setRInfo((s << 8) + t, IsMips64EL); - } +template <endianness TargetEndianness> +struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, true> + : public Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> { + LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) + Elf_Sxword r_addend; // Compute value for relocatable field by adding this. }; template <class ELFT> diff --git a/include/llvm/Object/Error.h b/include/llvm/Object/Error.h index c9db1b8..aa320bb 100644 --- a/include/llvm/Object/Error.h +++ b/include/llvm/Object/Error.h @@ -27,6 +27,8 @@ enum class object_error { invalid_file_type, parse_failed, unexpected_eof, + string_table_non_null_end, + invalid_section_index, bitcode_section_not_found, macho_small_load_command, macho_load_segment_too_many_sections, diff --git a/include/llvm/Object/IRObjectFile.h b/include/llvm/Object/IRObjectFile.h index f713570..ef65528 100644 --- a/include/llvm/Object/IRObjectFile.h +++ b/include/llvm/Object/IRObjectFile.h @@ -68,7 +68,7 @@ public: static ErrorOr<std::unique_ptr<IRObjectFile>> create(MemoryBufferRef Object, LLVMContext &Context); }; -} // namespace object -} // namespace llvm +} +} #endif diff --git a/include/llvm/Object/MachO.h b/include/llvm/Object/MachO.h index 4350a75..f4edfd0 100644 --- a/include/llvm/Object/MachO.h +++ b/include/llvm/Object/MachO.h @@ -197,8 +197,9 @@ public: std::error_code &EC); void moveSymbolNext(DataRefImpl &Symb) const override; - std::error_code getSymbolName(DataRefImpl Symb, - StringRef &Res) const override; + + uint64_t getNValue(DataRefImpl Sym) const; + ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override; // MachO specific. std::error_code getIndirectName(DataRefImpl Symb, StringRef &Res) const; @@ -206,13 +207,15 @@ public: std::error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const override; + uint64_t getSymbolValue(DataRefImpl Symb) const override; uint32_t getSymbolAlignment(DataRefImpl Symb) const override; - uint64_t getSymbolSize(DataRefImpl Symb) const override; - std::error_code getSymbolType(DataRefImpl Symb, - SymbolRef::Type &Res) const override; + uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override; + SymbolRef::Type getSymbolType(DataRefImpl Symb) const override; uint32_t getSymbolFlags(DataRefImpl Symb) const override; std::error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const override; + unsigned getSymbolSectionID(SymbolRef Symb) const; + unsigned getSectionID(SectionRef Sec) const; void moveSectionNext(DataRefImpl &Sec) const override; std::error_code getSectionName(DataRefImpl Sec, @@ -226,24 +229,17 @@ public: bool isSectionData(DataRefImpl Sec) const override; bool isSectionBSS(DataRefImpl Sec) const override; bool isSectionVirtual(DataRefImpl Sec) const override; - bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override; relocation_iterator section_rel_begin(DataRefImpl Sec) const override; relocation_iterator section_rel_end(DataRefImpl Sec) const override; void moveRelocationNext(DataRefImpl &Rel) const override; - std::error_code getRelocationAddress(DataRefImpl Rel, - uint64_t &Res) const override; - std::error_code getRelocationOffset(DataRefImpl Rel, - uint64_t &Res) const override; + ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override; + uint64_t getRelocationOffset(DataRefImpl Rel) const override; symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override; section_iterator getRelocationSection(DataRefImpl Rel) const; - std::error_code getRelocationType(DataRefImpl Rel, - uint64_t &Res) const override; - std::error_code - getRelocationTypeName(DataRefImpl Rel, - SmallVectorImpl<char> &Result) const override; - std::error_code getRelocationHidden(DataRefImpl Rel, - bool &Result) const override; + uint64_t getRelocationType(DataRefImpl Rel) const override; + void getRelocationTypeName(DataRefImpl Rel, + SmallVectorImpl<char> &Result) const override; uint8_t getRelocationLength(DataRefImpl Rel) const; // MachO specific. @@ -503,8 +499,8 @@ inline const ObjectFile *DiceRef::getObjectFile() const { return OwningObject; } -} // namespace object -} // namespace llvm +} +} #endif diff --git a/include/llvm/Object/MachOUniversal.h b/include/llvm/Object/MachOUniversal.h index ebc8b90..a11d381 100644 --- a/include/llvm/Object/MachOUniversal.h +++ b/include/llvm/Object/MachOUniversal.h @@ -109,10 +109,10 @@ public: } ErrorOr<std::unique_ptr<MachOObjectFile>> - getObjectForArch(Triple::ArchType Arch) const; + getObjectForArch(StringRef ArchName) const; }; -} // namespace object -} // namespace llvm +} +} #endif diff --git a/include/llvm/Object/ObjectFile.h b/include/llvm/Object/ObjectFile.h index e00fe0e..62eab10 100644 --- a/include/llvm/Object/ObjectFile.h +++ b/include/llvm/Object/ObjectFile.h @@ -35,8 +35,8 @@ class symbol_iterator; class SectionRef; typedef content_iterator<SectionRef> section_iterator; -/// RelocationRef - This is a value type class that represents a single -/// relocation in the list of relocations in the object file. +/// This is a value type class that represents a single relocation in the list +/// of relocations in the object file. class RelocationRef { DataRefImpl RelocationPimpl; const ObjectFile *OwningObject; @@ -50,29 +50,23 @@ public: void moveNext(); - std::error_code getAddress(uint64_t &Result) const; - std::error_code getOffset(uint64_t &Result) const; + ErrorOr<uint64_t> getAddress() const; + uint64_t getOffset() const; symbol_iterator getSymbol() const; - std::error_code getType(uint64_t &Result) const; - - /// @brief Indicates whether this relocation should hidden when listing - /// relocations, usually because it is the trailing part of a multipart - /// relocation that will be printed as part of the leading relocation. - std::error_code getHidden(bool &Result) const; + uint64_t getType() const; /// @brief Get a string that represents the type of this relocation. /// /// This is for display purposes only. - std::error_code getTypeName(SmallVectorImpl<char> &Result) const; - + void getTypeName(SmallVectorImpl<char> &Result) const; DataRefImpl getRawDataRefImpl() const; - const ObjectFile *getObjectFile() const; + const ObjectFile *getObject() const; }; typedef content_iterator<RelocationRef> relocation_iterator; -/// SectionRef - This is a value type class that represents a single section in -/// the list of sections in the object file. +/// This is a value type class that represents a single section in the list of +/// sections in the object file. class SectionRef { friend class SymbolRef; DataRefImpl SectionPimpl; @@ -116,8 +110,8 @@ public: const ObjectFile *getObject() const; }; -/// SymbolRef - This is a value type class that represents a single symbol in -/// the list of symbols in the object file. +/// This is a value type class that represents a single symbol in the list of +/// symbols in the object file. class SymbolRef : public BasicSymbolRef { friend class SectionRef; @@ -134,16 +128,23 @@ public: }; SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner); + SymbolRef(const BasicSymbolRef &B) : BasicSymbolRef(B) { + assert(isa<ObjectFile>(BasicSymbolRef::getObject())); + } - std::error_code getName(StringRef &Result) const; + ErrorOr<StringRef> getName() const; /// Returns the symbol virtual address (i.e. address at which it will be /// mapped). std::error_code getAddress(uint64_t &Result) const; + + /// Return the value of the symbol depending on the object this can be an + /// offset or a virtual address. + uint64_t getValue() const; + /// @brief Get the alignment of this symbol as the actual value (not log 2). uint32_t getAlignment() const; - uint64_t getSize() const; - std::error_code getType(SymbolRef::Type &Result) const; - std::error_code getOther(uint8_t &Result) const; + uint64_t getCommonSize() const; + SymbolRef::Type getType() const; /// @brief Get section this symbol is defined in reference to. Result is /// end_sections() if it is undefined or is an absolute symbol. @@ -170,9 +171,9 @@ public: } }; -/// ObjectFile - This class is the base class for all object file types. -/// Concrete instances of this object are created by createObjectFile, which -/// figures out which type to create. +/// This class is the base class for all object file types. Concrete instances +/// of this object are created by createObjectFile, which figures out which type +/// to create. class ObjectFile : public SymbolicFile { virtual void anchor(); ObjectFile() = delete; @@ -194,22 +195,17 @@ protected: // Implementations assume that the DataRefImpl is valid and has not been // modified externally. It's UB otherwise. friend class SymbolRef; - virtual std::error_code getSymbolName(DataRefImpl Symb, - StringRef &Res) const = 0; + virtual ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const = 0; std::error_code printSymbolName(raw_ostream &OS, DataRefImpl Symb) const override; virtual std::error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const = 0; + virtual uint64_t getSymbolValue(DataRefImpl Symb) const = 0; virtual uint32_t getSymbolAlignment(DataRefImpl Symb) const; - virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0; - virtual std::error_code getSymbolType(DataRefImpl Symb, - SymbolRef::Type &Res) const = 0; + virtual uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const = 0; + virtual SymbolRef::Type getSymbolType(DataRefImpl Symb) const = 0; virtual std::error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const = 0; - virtual std::error_code getSymbolOther(DataRefImpl Symb, - uint8_t &Res) const { - return object_error::invalid_file_type; - } // Same as above for SectionRef. friend class SectionRef; @@ -226,8 +222,6 @@ protected: virtual bool isSectionBSS(DataRefImpl Sec) const = 0; // A section is 'virtual' if its contents aren't present in the object image. virtual bool isSectionVirtual(DataRefImpl Sec) const = 0; - virtual bool sectionContainsSymbol(DataRefImpl Sec, - DataRefImpl Symb) const = 0; virtual relocation_iterator section_rel_begin(DataRefImpl Sec) const = 0; virtual relocation_iterator section_rel_end(DataRefImpl Sec) const = 0; virtual section_iterator getRelocatedSection(DataRefImpl Sec) const; @@ -235,23 +229,19 @@ protected: // Same as above for RelocationRef. friend class RelocationRef; virtual void moveRelocationNext(DataRefImpl &Rel) const = 0; - virtual std::error_code getRelocationAddress(DataRefImpl Rel, - uint64_t &Res) const = 0; - virtual std::error_code getRelocationOffset(DataRefImpl Rel, - uint64_t &Res) const = 0; + virtual ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const = 0; + virtual uint64_t getRelocationOffset(DataRefImpl Rel) const = 0; virtual symbol_iterator getRelocationSymbol(DataRefImpl Rel) const = 0; - virtual std::error_code getRelocationType(DataRefImpl Rel, - uint64_t &Res) const = 0; - virtual std::error_code - getRelocationTypeName(DataRefImpl Rel, - SmallVectorImpl<char> &Result) const = 0; - virtual std::error_code getRelocationHidden(DataRefImpl Rel, - bool &Result) const { - Result = false; - return std::error_code(); - } + virtual uint64_t getRelocationType(DataRefImpl Rel) const = 0; + virtual void getRelocationTypeName(DataRefImpl Rel, + SmallVectorImpl<char> &Result) const = 0; public: + uint64_t getCommonSymbolSize(DataRefImpl Symb) const { + assert(getSymbolFlags(Symb) & SymbolRef::SF_Common); + return getCommonSymbolSizeImpl(Symb); + } + typedef iterator_range<symbol_iterator> symbol_iterator_range; symbol_iterator_range symbols() const { return symbol_iterator_range(symbol_begin(), symbol_end()); @@ -314,32 +304,32 @@ public: inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner) : BasicSymbolRef(SymbolP, Owner) {} -inline std::error_code SymbolRef::getName(StringRef &Result) const { - return getObject()->getSymbolName(getRawDataRefImpl(), Result); +inline ErrorOr<StringRef> SymbolRef::getName() const { + return getObject()->getSymbolName(getRawDataRefImpl()); } inline std::error_code SymbolRef::getAddress(uint64_t &Result) const { return getObject()->getSymbolAddress(getRawDataRefImpl(), Result); } +inline uint64_t SymbolRef::getValue() const { + return getObject()->getSymbolValue(getRawDataRefImpl()); +} + inline uint32_t SymbolRef::getAlignment() const { return getObject()->getSymbolAlignment(getRawDataRefImpl()); } -inline uint64_t SymbolRef::getSize() const { - return getObject()->getSymbolSize(getRawDataRefImpl()); +inline uint64_t SymbolRef::getCommonSize() const { + return getObject()->getCommonSymbolSize(getRawDataRefImpl()); } inline std::error_code SymbolRef::getSection(section_iterator &Result) const { return getObject()->getSymbolSection(getRawDataRefImpl(), Result); } -inline std::error_code SymbolRef::getType(SymbolRef::Type &Result) const { - return getObject()->getSymbolType(getRawDataRefImpl(), Result); -} - -inline std::error_code SymbolRef::getOther(uint8_t &Result) const { - return getObject()->getSymbolOther(getRawDataRefImpl(), Result); +inline SymbolRef::Type SymbolRef::getType() const { + return getObject()->getSymbolType(getRawDataRefImpl()); } inline const ObjectFile *SymbolRef::getObject() const { @@ -406,11 +396,6 @@ inline bool SectionRef::isVirtual() const { return OwningObject->isSectionVirtual(SectionPimpl); } -inline bool SectionRef::containsSymbol(SymbolRef S) const { - return OwningObject->sectionContainsSymbol(SectionPimpl, - S.getRawDataRefImpl()); -} - inline relocation_iterator SectionRef::relocation_begin() const { return OwningObject->section_rel_begin(SectionPimpl); } @@ -445,36 +430,31 @@ inline void RelocationRef::moveNext() { return OwningObject->moveRelocationNext(RelocationPimpl); } -inline std::error_code RelocationRef::getAddress(uint64_t &Result) const { - return OwningObject->getRelocationAddress(RelocationPimpl, Result); +inline ErrorOr<uint64_t> RelocationRef::getAddress() const { + return OwningObject->getRelocationAddress(RelocationPimpl); } -inline std::error_code RelocationRef::getOffset(uint64_t &Result) const { - return OwningObject->getRelocationOffset(RelocationPimpl, Result); +inline uint64_t RelocationRef::getOffset() const { + return OwningObject->getRelocationOffset(RelocationPimpl); } inline symbol_iterator RelocationRef::getSymbol() const { return OwningObject->getRelocationSymbol(RelocationPimpl); } -inline std::error_code RelocationRef::getType(uint64_t &Result) const { - return OwningObject->getRelocationType(RelocationPimpl, Result); +inline uint64_t RelocationRef::getType() const { + return OwningObject->getRelocationType(RelocationPimpl); } -inline std::error_code -RelocationRef::getTypeName(SmallVectorImpl<char> &Result) const { +inline void RelocationRef::getTypeName(SmallVectorImpl<char> &Result) const { return OwningObject->getRelocationTypeName(RelocationPimpl, Result); } -inline std::error_code RelocationRef::getHidden(bool &Result) const { - return OwningObject->getRelocationHidden(RelocationPimpl, Result); -} - inline DataRefImpl RelocationRef::getRawDataRefImpl() const { return RelocationPimpl; } -inline const ObjectFile *RelocationRef::getObjectFile() const { +inline const ObjectFile *RelocationRef::getObject() const { return OwningObject; } diff --git a/include/llvm/Object/RelocVisitor.h b/include/llvm/Object/RelocVisitor.h index f80ee0a..950e2ed 100644 --- a/include/llvm/Object/RelocVisitor.h +++ b/include/llvm/Object/RelocVisitor.h @@ -240,16 +240,14 @@ private: } int64_t getELFAddend(RelocationRef R) { - const auto *Obj = cast<ELFObjectFileBase>(R.getObjectFile()); - DataRefImpl DRI = R.getRawDataRefImpl(); - ErrorOr<int64_t> AddendOrErr = Obj->getRelocationAddend(DRI); + ErrorOr<int64_t> AddendOrErr = ELFRelocationRef(R).getAddend(); if (std::error_code EC = AddendOrErr.getError()) report_fatal_error(EC.message()); return *AddendOrErr; } uint8_t getLengthMachO64(RelocationRef R) { - const MachOObjectFile *Obj = cast<MachOObjectFile>(R.getObjectFile()); + const MachOObjectFile *Obj = cast<MachOObjectFile>(R.getObject()); return Obj->getRelocationLength(R.getRawDataRefImpl()); } @@ -267,8 +265,7 @@ private: } RelocToApply visitELF_386_PC32(RelocationRef R, uint64_t Value) { - uint64_t Address; - R.getOffset(Address); + uint64_t Address = R.getOffset(); return RelocToApply(Value - Address, 4); } @@ -282,8 +279,7 @@ private: } RelocToApply visitELF_X86_64_PC32(RelocationRef R, uint64_t Value) { int64_t Addend = getELFAddend(R); - uint64_t Address; - R.getOffset(Address); + uint64_t Address = R.getOffset(); return RelocToApply(Value + Addend - Address, 4); } RelocToApply visitELF_X86_64_32(RelocationRef R, uint64_t Value) { @@ -412,6 +408,6 @@ private: } }; -} // namespace object -} // namespace llvm +} +} #endif diff --git a/include/llvm/Object/StackMapParser.h b/include/llvm/Object/StackMapParser.h new file mode 100644 index 0000000..276eab6 --- /dev/null +++ b/include/llvm/Object/StackMapParser.h @@ -0,0 +1,442 @@ +//===-------- StackMapParser.h - StackMap Parsing Support -------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CODEGEN_STACKMAPPARSER_H +#define LLVM_CODEGEN_STACKMAPPARSER_H + +#include "llvm/Support/Debug.h" +#include "llvm/Support/Endian.h" +#include <map> +#include <vector> + +namespace llvm { + +template <support::endianness Endianness> +class StackMapV1Parser { +public: + + template <typename AccessorT> + class AccessorIterator { + public: + + AccessorIterator(AccessorT A) : A(A) {} + AccessorIterator& operator++() { A = A.next(); return *this; } + AccessorIterator operator++(int) { + auto tmp = *this; + ++*this; + return tmp; + } + + bool operator==(const AccessorIterator &Other) { + return A.P == Other.A.P; + } + + bool operator!=(const AccessorIterator &Other) { return !(*this == Other); } + + AccessorT& operator*() { return A; } + AccessorT* operator->() { return &A; } + + private: + AccessorT A; + }; + + /// Accessor for function records. + class FunctionAccessor { + friend class StackMapV1Parser; + public: + + /// Get the function address. + uint64_t getFunctionAddress() const { + return read<uint64_t>(P); + } + + /// Get the function's stack size. + uint32_t getStackSize() const { + return read<uint64_t>(P + sizeof(uint64_t)); + } + + private: + FunctionAccessor(const uint8_t *P) : P(P) {} + + const static int FunctionAccessorSize = 2 * sizeof(uint64_t); + + FunctionAccessor next() const { + return FunctionAccessor(P + FunctionAccessorSize); + } + + const uint8_t *P; + }; + + /// Accessor for constants. + class ConstantAccessor { + friend class StackMapV1Parser; + public: + + /// Return the value of this constant. + uint64_t getValue() const { return read<uint64_t>(P); } + + private: + + ConstantAccessor(const uint8_t *P) : P(P) {} + + const static int ConstantAccessorSize = sizeof(uint64_t); + + ConstantAccessor next() const { + return ConstantAccessor(P + ConstantAccessorSize); + } + + const uint8_t *P; + }; + + // Forward-declare RecordAccessor so we can friend it below. + class RecordAccessor; + + enum class LocationKind : uint8_t { + Register = 1, Direct = 2, Indirect = 3, Constant = 4, ConstantIndex = 5 + }; + + + /// Accessor for location records. + class LocationAccessor { + friend class StackMapV1Parser; + friend class RecordAccessor; + public: + + /// Get the Kind for this location. + LocationKind getKind() const { + return LocationKind(P[KindOffset]); + } + + /// Get the Dwarf register number for this location. + uint16_t getDwarfRegNum() const { + return read<uint16_t>(P + DwarfRegNumOffset); + } + + /// Get the small-constant for this location. (Kind must be Constant). + uint32_t getSmallConstant() const { + assert(getKind() == LocationKind::Constant && "Not a small constant."); + return read<uint32_t>(P + SmallConstantOffset); + } + + /// Get the constant-index for this location. (Kind must be ConstantIndex). + uint32_t getConstantIndex() const { + assert(getKind() == LocationKind::ConstantIndex && + "Not a constant-index."); + return read<uint32_t>(P + SmallConstantOffset); + } + + /// Get the offset for this location. (Kind must be Direct or Indirect). + int32_t getOffset() const { + assert((getKind() == LocationKind::Direct || + getKind() == LocationKind::Indirect) && + "Not direct or indirect."); + return read<int32_t>(P + SmallConstantOffset); + } + + private: + + LocationAccessor(const uint8_t *P) : P(P) {} + + LocationAccessor next() const { + return LocationAccessor(P + LocationAccessorSize); + } + + static const int KindOffset = 0; + static const int DwarfRegNumOffset = KindOffset + sizeof(uint16_t); + static const int SmallConstantOffset = DwarfRegNumOffset + sizeof(uint16_t); + static const int LocationAccessorSize = sizeof(uint64_t); + + const uint8_t *P; + }; + + /// Accessor for stackmap live-out fields. + class LiveOutAccessor { + friend class StackMapV1Parser; + friend class RecordAccessor; + public: + + /// Get the Dwarf register number for this live-out. + uint16_t getDwarfRegNum() const { + return read<uint16_t>(P + DwarfRegNumOffset); + } + + /// Get the size in bytes of live [sub]register. + unsigned getSizeInBytes() const { + return read<uint8_t>(P + SizeOffset); + } + + private: + + LiveOutAccessor(const uint8_t *P) : P(P) {} + + LiveOutAccessor next() const { + return LiveOutAccessor(P + LiveOutAccessorSize); + } + + static const int DwarfRegNumOffset = 0; + static const int SizeOffset = + DwarfRegNumOffset + sizeof(uint16_t) + sizeof(uint8_t); + static const int LiveOutAccessorSize = sizeof(uint32_t); + + const uint8_t *P; + }; + + /// Accessor for stackmap records. + class RecordAccessor { + friend class StackMapV1Parser; + public: + + typedef AccessorIterator<LocationAccessor> location_iterator; + typedef AccessorIterator<LiveOutAccessor> liveout_iterator; + + /// Get the patchpoint/stackmap ID for this record. + uint64_t getID() const { + return read<uint64_t>(P + PatchpointIDOffset); + } + + /// Get the instruction offset (from the start of the containing function) + /// for this record. + uint32_t getInstructionOffset() const { + return read<uint32_t>(P + InstructionOffsetOffset); + } + + /// Get the number of locations contained in this record. + uint16_t getNumLocations() const { + return read<uint16_t>(P + NumLocationsOffset); + } + + /// Get the location with the given index. + LocationAccessor getLocation(unsigned LocationIndex) const { + unsigned LocationOffset = + LocationListOffset + LocationIndex * LocationSize; + return LocationAccessor(P + LocationOffset); + } + + /// Begin iterator for locations. + location_iterator location_begin() const { + return location_iterator(getLocation(0)); + } + + /// End iterator for locations. + location_iterator location_end() const { + return location_iterator(getLocation(getNumLocations())); + } + + /// Iterator range for locations. + iterator_range<location_iterator> locations() const { + return make_range(location_begin(), location_end()); + } + + /// Get the number of liveouts contained in this record. + uint16_t getNumLiveOuts() const { + return read<uint16_t>(P + getNumLiveOutsOffset()); + } + + /// Get the live-out with the given index. + LiveOutAccessor getLiveOut(unsigned LiveOutIndex) const { + unsigned LiveOutOffset = + getNumLiveOutsOffset() + sizeof(uint16_t) + LiveOutIndex * LiveOutSize; + return LiveOutAccessor(P + LiveOutOffset); + } + + /// Begin iterator for live-outs. + liveout_iterator liveouts_begin() const { + return liveout_iterator(getLiveOut(0)); + } + + + /// End iterator for live-outs. + liveout_iterator liveouts_end() const { + return liveout_iterator(getLiveOut(getNumLiveOuts())); + } + + /// Iterator range for live-outs. + iterator_range<liveout_iterator> liveouts() const { + return make_range(liveouts_begin(), liveouts_end()); + } + + private: + + RecordAccessor(const uint8_t *P) : P(P) {} + + unsigned getNumLiveOutsOffset() const { + return LocationListOffset + LocationSize * getNumLocations() + + sizeof(uint16_t); + } + + unsigned getSizeInBytes() const { + unsigned RecordSize = + getNumLiveOutsOffset() + sizeof(uint16_t) + getNumLiveOuts() * LiveOutSize; + return (RecordSize + 7) & ~0x7; + } + + RecordAccessor next() const { + return RecordAccessor(P + getSizeInBytes()); + } + + static const unsigned PatchpointIDOffset = 0; + static const unsigned InstructionOffsetOffset = + PatchpointIDOffset + sizeof(uint64_t); + static const unsigned NumLocationsOffset = + InstructionOffsetOffset + sizeof(uint32_t) + sizeof(uint16_t); + static const unsigned LocationListOffset = + NumLocationsOffset + sizeof(uint16_t); + static const unsigned LocationSize = sizeof(uint64_t); + static const unsigned LiveOutSize = sizeof(uint32_t); + + const uint8_t *P; + }; + + /// Construct a parser for a version-1 stackmap. StackMap data will be read + /// from the given array. + StackMapV1Parser(ArrayRef<uint8_t> StackMapSection) + : StackMapSection(StackMapSection) { + ConstantsListOffset = FunctionListOffset + getNumFunctions() * FunctionSize; + + assert(StackMapSection[0] == 1 && + "StackMapV1Parser can only parse version 1 stackmaps"); + + unsigned CurrentRecordOffset = + ConstantsListOffset + getNumConstants() * ConstantSize; + + for (unsigned I = 0, E = getNumRecords(); I != E; ++I) { + StackMapRecordOffsets.push_back(CurrentRecordOffset); + CurrentRecordOffset += + RecordAccessor(&StackMapSection[CurrentRecordOffset]).getSizeInBytes(); + } + } + + typedef AccessorIterator<FunctionAccessor> function_iterator; + typedef AccessorIterator<ConstantAccessor> constant_iterator; + typedef AccessorIterator<RecordAccessor> record_iterator; + + /// Get the version number of this stackmap. (Always returns 1). + unsigned getVersion() const { return 1; } + + /// Get the number of functions in the stack map. + uint32_t getNumFunctions() const { + return read<uint32_t>(&StackMapSection[NumFunctionsOffset]); + } + + /// Get the number of large constants in the stack map. + uint32_t getNumConstants() const { + return read<uint32_t>(&StackMapSection[NumConstantsOffset]); + } + + /// Get the number of stackmap records in the stackmap. + uint32_t getNumRecords() const { + return read<uint32_t>(&StackMapSection[NumRecordsOffset]); + } + + /// Return an FunctionAccessor for the given function index. + FunctionAccessor getFunction(unsigned FunctionIndex) const { + return FunctionAccessor(StackMapSection.data() + + getFunctionOffset(FunctionIndex)); + } + + /// Begin iterator for functions. + function_iterator functions_begin() const { + return function_iterator(getFunction(0)); + } + + /// End iterator for functions. + function_iterator functions_end() const { + return function_iterator( + FunctionAccessor(StackMapSection.data() + + getFunctionOffset(getNumFunctions()))); + } + + /// Iterator range for functions. + iterator_range<function_iterator> functions() const { + return make_range(functions_begin(), functions_end()); + } + + /// Return the large constant at the given index. + ConstantAccessor getConstant(unsigned ConstantIndex) const { + return ConstantAccessor(StackMapSection.data() + + getConstantOffset(ConstantIndex)); + } + + /// Begin iterator for constants. + constant_iterator constants_begin() const { + return constant_iterator(getConstant(0)); + } + + /// End iterator for constants. + constant_iterator constants_end() const { + return constant_iterator( + ConstantAccessor(StackMapSection.data() + + getConstantOffset(getNumConstants()))); + } + + /// Iterator range for constants. + iterator_range<constant_iterator> constants() const { + return make_range(constants_begin(), constants_end()); + } + + /// Return a RecordAccessor for the given record index. + RecordAccessor getRecord(unsigned RecordIndex) const { + std::size_t RecordOffset = StackMapRecordOffsets[RecordIndex]; + return RecordAccessor(StackMapSection.data() + RecordOffset); + } + + /// Begin iterator for records. + record_iterator records_begin() const { + if (getNumRecords() == 0) + return record_iterator(RecordAccessor(nullptr)); + return record_iterator(getRecord(0)); + } + + /// End iterator for records. + record_iterator records_end() const { + // Records need to be handled specially, since we cache the start addresses + // for them: We can't just compute the 1-past-the-end address, we have to + // look at the last record and use the 'next' method. + if (getNumRecords() == 0) + return record_iterator(RecordAccessor(nullptr)); + return record_iterator(getRecord(getNumRecords() - 1).next()); + } + + /// Iterator range for records. + iterator_range<record_iterator> records() const { + return make_range(records_begin(), records_end()); + } + +private: + + template <typename T> + static T read(const uint8_t *P) { + return support::endian::read<T, Endianness, 1>(P); + } + + static const unsigned HeaderOffset = 0; + static const unsigned NumFunctionsOffset = HeaderOffset + sizeof(uint32_t); + static const unsigned NumConstantsOffset = NumFunctionsOffset + sizeof(uint32_t); + static const unsigned NumRecordsOffset = NumConstantsOffset + sizeof(uint32_t); + static const unsigned FunctionListOffset = NumRecordsOffset + sizeof(uint32_t); + + static const unsigned FunctionSize = 2 * sizeof(uint64_t); + static const unsigned ConstantSize = sizeof(uint64_t); + + std::size_t getFunctionOffset(unsigned FunctionIndex) const { + return FunctionListOffset + FunctionIndex * FunctionSize; + } + + std::size_t getConstantOffset(unsigned ConstantIndex) const { + return ConstantsListOffset + ConstantIndex * ConstantSize; + } + + ArrayRef<uint8_t> StackMapSection; + unsigned ConstantsListOffset; + std::vector<unsigned> StackMapRecordOffsets; +}; + +} + +#endif diff --git a/include/llvm/Object/SymbolSize.h b/include/llvm/Object/SymbolSize.h new file mode 100644 index 0000000..f2ce70f --- /dev/null +++ b/include/llvm/Object/SymbolSize.h @@ -0,0 +1,23 @@ +//===- SymbolSize.h ---------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_OBJECT_SYMBOLSIZE_H +#define LLVM_OBJECT_SYMBOLSIZE_H + +#include "llvm/Object/ObjectFile.h" + +namespace llvm { +namespace object { +std::vector<std::pair<SymbolRef, uint64_t>> +computeSymbolSizes(const ObjectFile &O); +} +} // namespace llvm + +#endif diff --git a/include/llvm/Object/SymbolicFile.h b/include/llvm/Object/SymbolicFile.h index bf46599..3a38231 100644 --- a/include/llvm/Object/SymbolicFile.h +++ b/include/llvm/Object/SymbolicFile.h @@ -115,7 +115,7 @@ public: typedef content_iterator<BasicSymbolRef> basic_symbol_iterator; -const uint64_t UnknownAddressOrSize = ~0ULL; +const uint64_t UnknownAddress = ~0ULL; class SymbolicFile : public Binary { public: @@ -195,7 +195,7 @@ inline const SymbolicFile *BasicSymbolRef::getObject() const { return OwningObject; } -} // namespace object -} // namespace llvm +} +} #endif |
