//
//===----------------------------------------------------------------------===//
//
-// This file declares the ELFObjectFile template class.
+// This file declares the ELFFile template class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_OBJECT_ELF_H
#define LLVM_OBJECT_ELF_H
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/PointerIntPair.h"
-#include "llvm/Object/ObjectFile.h"
+#include "llvm/Object/ELFTypes.h"
+#include "llvm/Object/Error.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
namespace llvm {
namespace object {
-// Subclasses of ELFObjectFile may need this for template instantiation
+StringRef getELFRelocationTypeName(uint32_t Machine, uint32_t Type);
+
+// Subclasses of ELFFile may need this for template instantiation
inline std::pair<unsigned char, unsigned char>
getElfArchType(MemoryBuffer *Object) {
if (Object->getBufferSize() < ELF::EI_NIDENT)
return std::make_pair((uint8_t)ELF::ELFCLASSNONE,(uint8_t)ELF::ELFDATANONE);
- return std::make_pair( (uint8_t)Object->getBufferStart()[ELF::EI_CLASS]
- , (uint8_t)Object->getBufferStart()[ELF::EI_DATA]);
+ return std::make_pair((uint8_t) Object->getBufferStart()[ELF::EI_CLASS],
+ (uint8_t) Object->getBufferStart()[ELF::EI_DATA]);
}
-// Templates to choose Elf_Addr and Elf_Off depending on is64Bits.
-template<support::endianness target_endianness>
-struct ELFDataTypeTypedefHelperCommon {
- typedef support::detail::packed_endian_specific_integral
- <uint16_t, target_endianness, support::aligned> Elf_Half;
- typedef support::detail::packed_endian_specific_integral
- <uint32_t, target_endianness, support::aligned> Elf_Word;
- typedef support::detail::packed_endian_specific_integral
- <int32_t, target_endianness, support::aligned> Elf_Sword;
- typedef support::detail::packed_endian_specific_integral
- <uint64_t, target_endianness, support::aligned> Elf_Xword;
- typedef support::detail::packed_endian_specific_integral
- <int64_t, target_endianness, support::aligned> Elf_Sxword;
-};
-
-template<support::endianness target_endianness, bool is64Bits>
-struct ELFDataTypeTypedefHelper;
-
-/// ELF 32bit types.
-template<support::endianness target_endianness>
-struct ELFDataTypeTypedefHelper<target_endianness, false>
- : ELFDataTypeTypedefHelperCommon<target_endianness> {
- typedef uint32_t value_type;
- typedef support::detail::packed_endian_specific_integral
- <value_type, target_endianness, support::aligned> Elf_Addr;
- typedef support::detail::packed_endian_specific_integral
- <value_type, target_endianness, support::aligned> Elf_Off;
-};
-
-/// ELF 64bit types.
-template<support::endianness target_endianness>
-struct ELFDataTypeTypedefHelper<target_endianness, true>
- : ELFDataTypeTypedefHelperCommon<target_endianness>{
- typedef uint64_t value_type;
- typedef support::detail::packed_endian_specific_integral
- <value_type, target_endianness, support::aligned> Elf_Addr;
- typedef support::detail::packed_endian_specific_integral
- <value_type, target_endianness, support::aligned> Elf_Off;
-};
-
-// I really don't like doing this, but the alternative is copypasta.
-#define LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits) \
-typedef typename \
- ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Addr Elf_Addr; \
-typedef typename \
- ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Off Elf_Off; \
-typedef typename \
- ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Half Elf_Half; \
-typedef typename \
- ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Word Elf_Word; \
-typedef typename \
- ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sword Elf_Sword; \
-typedef typename \
- ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Xword Elf_Xword; \
-typedef typename \
- ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sxword Elf_Sxword;
-
- // Section header.
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Shdr_Base;
-
-template<support::endianness target_endianness>
-struct Elf_Shdr_Base<target_endianness, false> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, false)
- Elf_Word sh_name; // Section name (index into string table)
- Elf_Word sh_type; // Section type (SHT_*)
- Elf_Word sh_flags; // Section flags (SHF_*)
- Elf_Addr sh_addr; // Address where section is to be loaded
- Elf_Off sh_offset; // File offset of section data, in bytes
- Elf_Word sh_size; // Size of section, in bytes
- Elf_Word sh_link; // Section type-specific header table index link
- Elf_Word sh_info; // Section type-specific extra information
- Elf_Word sh_addralign;// Section address alignment
- Elf_Word sh_entsize; // Size of records contained within the section
-};
-
-template<support::endianness target_endianness>
-struct Elf_Shdr_Base<target_endianness, true> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, true)
- Elf_Word sh_name; // Section name (index into string table)
- Elf_Word sh_type; // Section type (SHT_*)
- Elf_Xword sh_flags; // Section flags (SHF_*)
- Elf_Addr sh_addr; // Address where section is to be loaded
- Elf_Off sh_offset; // File offset of section data, in bytes
- Elf_Xword sh_size; // Size of section, in bytes
- Elf_Word sh_link; // Section type-specific header table index link
- Elf_Word sh_info; // Section type-specific extra information
- Elf_Xword sh_addralign;// Section address alignment
- Elf_Xword sh_entsize; // Size of records contained within the section
-};
-
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Shdr_Impl : Elf_Shdr_Base<target_endianness, is64Bits> {
- using Elf_Shdr_Base<target_endianness, is64Bits>::sh_entsize;
- using Elf_Shdr_Base<target_endianness, is64Bits>::sh_size;
-
- /// @brief Get the number of entities this section contains if it has any.
- unsigned getEntityCount() const {
- if (sh_entsize == 0)
- return 0;
- return sh_size / sh_entsize;
- }
-};
-
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Sym_Base;
-
-template<support::endianness target_endianness>
-struct Elf_Sym_Base<target_endianness, false> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, false)
- Elf_Word st_name; // Symbol name (index into string table)
- Elf_Addr st_value; // Value or address associated with the symbol
- Elf_Word st_size; // Size of the symbol
- unsigned char st_info; // Symbol's type and binding attributes
- unsigned char st_other; // Must be zero; reserved
- Elf_Half st_shndx; // Which section (header table index) it's defined in
-};
+template <class ELFT>
+class ELFFile {
+public:
+ LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
+ typedef typename std::conditional<ELFT::Is64Bits,
+ uint64_t, uint32_t>::type uintX_t;
-template<support::endianness target_endianness>
-struct Elf_Sym_Base<target_endianness, true> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, true)
- Elf_Word st_name; // Symbol name (index into string table)
- unsigned char st_info; // Symbol's type and binding attributes
- unsigned char st_other; // Must be zero; reserved
- Elf_Half st_shndx; // Which section (header table index) it's defined in
- Elf_Addr st_value; // Value or address associated with the symbol
- Elf_Xword st_size; // Size of the symbol
-};
+ /// \brief Iterate over constant sized entities.
+ template <class EntT>
+ class ELFEntityIterator {
+ public:
+ typedef ptrdiff_t difference_type;
+ typedef EntT value_type;
+ typedef std::random_access_iterator_tag iterator_category;
+ typedef value_type &reference;
+ typedef value_type *pointer;
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Sym_Impl : Elf_Sym_Base<target_endianness, is64Bits> {
- using Elf_Sym_Base<target_endianness, is64Bits>::st_info;
-
- // These accessors and mutators correspond to the ELF32_ST_BIND,
- // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
- unsigned char getBinding() const { return st_info >> 4; }
- unsigned char getType() const { return st_info & 0x0f; }
- void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
- void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
- void setBindingAndType(unsigned char b, unsigned char t) {
- st_info = (b << 4) + (t & 0x0f);
- }
-};
+ /// \brief Default construct iterator.
+ ELFEntityIterator() : EntitySize(0), Current(nullptr) {}
+ ELFEntityIterator(uintX_t EntSize, const char *Start)
+ : EntitySize(EntSize), Current(Start) {}
-/// 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<support::endianness target_endianness, bool is64Bits>
-struct Elf_Versym_Impl {
- LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
- Elf_Half vs_index; // Version index with flags (e.g. VERSYM_HIDDEN)
-};
+ reference operator *() {
+ assert(Current && "Attempted to dereference an invalid iterator!");
+ return *reinterpret_cast<pointer>(Current);
+ }
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Verdaux_Impl;
-
-/// Elf_Verdef: This is the structure of entries in the SHT_GNU_verdef section
-/// (.gnu.version_d). This structure is identical for ELF32 and ELF64.
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Verdef_Impl {
- LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
- typedef Elf_Verdaux_Impl<target_endianness, is64Bits> Elf_Verdaux;
- Elf_Half vd_version; // Version of this structure (e.g. VER_DEF_CURRENT)
- Elf_Half vd_flags; // Bitwise flags (VER_DEF_*)
- Elf_Half vd_ndx; // Version index, used in .gnu.version entries
- Elf_Half vd_cnt; // Number of Verdaux entries
- Elf_Word vd_hash; // Hash of name
- Elf_Word vd_aux; // Offset to the first Verdaux entry (in bytes)
- Elf_Word vd_next; // Offset to the next Verdef entry (in bytes)
-
- /// Get the first Verdaux entry for this Verdef.
- const Elf_Verdaux *getAux() const {
- return reinterpret_cast<const Elf_Verdaux*>((const char*)this + vd_aux);
- }
-};
+ pointer operator ->() {
+ assert(Current && "Attempted to dereference an invalid iterator!");
+ return reinterpret_cast<pointer>(Current);
+ }
-/// Elf_Verdaux: This is the structure of auxilary data in the SHT_GNU_verdef
-/// section (.gnu.version_d). This structure is identical for ELF32 and ELF64.
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Verdaux_Impl {
- LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
- Elf_Word vda_name; // Version name (offset in string table)
- Elf_Word vda_next; // Offset to next Verdaux entry (in bytes)
-};
+ bool operator ==(const ELFEntityIterator &Other) {
+ return Current == Other.Current;
+ }
-/// Elf_Verneed: This is the structure of entries in the SHT_GNU_verneed
-/// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Verneed_Impl {
- LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
- Elf_Half vn_version; // Version of this structure (e.g. VER_NEED_CURRENT)
- Elf_Half vn_cnt; // Number of associated Vernaux entries
- Elf_Word vn_file; // Library name (string table offset)
- Elf_Word vn_aux; // Offset to first Vernaux entry (in bytes)
- Elf_Word vn_next; // Offset to next Verneed entry (in bytes)
-};
+ bool operator !=(const ELFEntityIterator &Other) {
+ return !(*this == Other);
+ }
-/// Elf_Vernaux: This is the structure of auxiliary data in SHT_GNU_verneed
-/// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Vernaux_Impl {
- LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
- Elf_Word vna_hash; // Hash of dependency name
- Elf_Half vna_flags; // Bitwise Flags (VER_FLAG_*)
- Elf_Half vna_other; // Version index, used in .gnu.version entries
- Elf_Word vna_name; // Dependency name
- Elf_Word vna_next; // Offset to next Vernaux entry (in bytes)
-};
+ ELFEntityIterator &operator ++() {
+ assert(Current && "Attempted to increment an invalid iterator!");
+ Current += EntitySize;
+ return *this;
+ }
-/// Elf_Dyn_Base: This structure matches the form of entries in the dynamic
-/// table section (.dynamic) look like.
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Dyn_Base;
-
-template<support::endianness target_endianness>
-struct Elf_Dyn_Base<target_endianness, false> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, false)
- Elf_Sword d_tag;
- union {
- Elf_Word d_val;
- Elf_Addr d_ptr;
- } d_un;
-};
+ ELFEntityIterator operator ++(int) {
+ ELFEntityIterator Tmp = *this;
+ ++*this;
+ return Tmp;
+ }
-template<support::endianness target_endianness>
-struct Elf_Dyn_Base<target_endianness, true> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, true)
- Elf_Sxword d_tag;
- union {
- Elf_Xword d_val;
- Elf_Addr d_ptr;
- } d_un;
-};
+ ELFEntityIterator &operator =(const ELFEntityIterator &Other) {
+ EntitySize = Other.EntitySize;
+ Current = Other.Current;
+ return *this;
+ }
-/// Elf_Dyn_Impl: This inherits from Elf_Dyn_Base, adding getters and setters.
-template<support::endianness target_endianness, bool is64Bits>
-struct Elf_Dyn_Impl : Elf_Dyn_Base<target_endianness, is64Bits> {
- using Elf_Dyn_Base<target_endianness, is64Bits>::d_tag;
- using Elf_Dyn_Base<target_endianness, is64Bits>::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; }
-};
+ difference_type operator -(const ELFEntityIterator &Other) const {
+ assert(EntitySize == Other.EntitySize &&
+ "Subtracting iterators of different EntitySize!");
+ return (Current - Other.Current) / EntitySize;
+ }
-template<support::endianness target_endianness, bool is64Bits>
-class ELFObjectFile;
+ const char *get() const { return Current; }
-// DynRefImpl: Reference to an entry in the dynamic table
-// This is an ELF-specific interface.
-template<support::endianness target_endianness, bool is64Bits>
-class DynRefImpl {
- typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
- typedef ELFObjectFile<target_endianness, is64Bits> OwningType;
+ uintX_t getEntSize() const { return EntitySize; }
- DataRefImpl DynPimpl;
- const OwningType *OwningObject;
+ private:
+ uintX_t EntitySize;
+ const char *Current;
+ };
-public:
- DynRefImpl() : OwningObject(NULL) { }
+ typedef Elf_Ehdr_Impl<ELFT> Elf_Ehdr;
+ typedef Elf_Shdr_Impl<ELFT> Elf_Shdr;
+ typedef Elf_Sym_Impl<ELFT> Elf_Sym;
+ typedef Elf_Dyn_Impl<ELFT> Elf_Dyn;
+ typedef Elf_Phdr_Impl<ELFT> Elf_Phdr;
+ typedef Elf_Rel_Impl<ELFT, false> Elf_Rel;
+ typedef Elf_Rel_Impl<ELFT, true> Elf_Rela;
+ typedef Elf_Verdef_Impl<ELFT> Elf_Verdef;
+ typedef Elf_Verdaux_Impl<ELFT> Elf_Verdaux;
+ typedef Elf_Verneed_Impl<ELFT> Elf_Verneed;
+ typedef Elf_Vernaux_Impl<ELFT> Elf_Vernaux;
+ typedef Elf_Versym_Impl<ELFT> Elf_Versym;
+ typedef ELFEntityIterator<const Elf_Dyn> Elf_Dyn_Iter;
+ typedef ELFEntityIterator<const Elf_Rela> Elf_Rela_Iter;
+ typedef ELFEntityIterator<const Elf_Rel> Elf_Rel_Iter;
+ typedef ELFEntityIterator<const Elf_Shdr> Elf_Shdr_Iter;
+
+ /// \brief Archive files are 2 byte aligned, so we need this for
+ /// PointerIntPair to work.
+ template <typename T>
+ class ArchivePointerTypeTraits {
+ public:
+ static inline const void *getAsVoidPointer(T *P) { return P; }
+ static inline T *getFromVoidPointer(const void *P) {
+ return static_cast<T *>(P);
+ }
+ enum { NumLowBitsAvailable = 1 };
+ };
- DynRefImpl(DataRefImpl DynP, const OwningType *Owner);
+ 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;
- bool operator==(const DynRefImpl &Other) const;
- bool operator <(const DynRefImpl &Other) const;
+ /// \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) {}
- error_code getNext(DynRefImpl &Result) const;
- int64_t getTag() const;
- uint64_t getVal() const;
- uint64_t getPtr() const;
+ reference operator*() {
+ assert(Current.getPointer() &&
+ "Attempted to dereference an invalid iterator!");
+ return *reinterpret_cast<pointer>(Current.getPointer());
+ }
- DataRefImpl getRawDataRefImpl() const;
-};
+ pointer operator->() {
+ assert(Current.getPointer() &&
+ "Attempted to dereference an invalid iterator!");
+ return reinterpret_cast<pointer>(Current.getPointer());
+ }
-// Elf_Rel: Elf Relocation
-template<support::endianness target_endianness, bool is64Bits, bool isRela>
-struct Elf_Rel_Base;
+ bool operator==(const Elf_Sym_Iter &Other) {
+ return Current == Other.Current;
+ }
-template<support::endianness target_endianness>
-struct Elf_Rel_Base<target_endianness, false, false> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, 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
-};
+ bool operator!=(const Elf_Sym_Iter &Other) { return !(*this == Other); }
-template<support::endianness target_endianness>
-struct Elf_Rel_Base<target_endianness, true, false> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, 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_Sym_Iter &operator++() {
+ assert(Current.getPointer() &&
+ "Attempted to increment an invalid iterator!");
+ Current.setPointer(Current.getPointer() + EntitySize);
+ return *this;
+ }
-template<support::endianness target_endianness>
-struct Elf_Rel_Base<target_endianness, false, true> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, 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
-};
+ Elf_Sym_Iter operator++(int) {
+ Elf_Sym_Iter Tmp = *this;
+ ++*this;
+ return Tmp;
+ }
-template<support::endianness target_endianness>
-struct Elf_Rel_Base<target_endianness, true, true> {
- LLVM_ELF_IMPORT_TYPES(target_endianness, 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_Sym_Iter operator+(difference_type Dist) {
+ assert(Current.getPointer() &&
+ "Attempted to increment an invalid iterator!");
+ Current.setPointer(Current.getPointer() + EntitySize * Dist);
+ return *this;
+ }
-template<support::endianness target_endianness, bool is64Bits, bool isRela>
-struct Elf_Rel_Impl;
+ Elf_Sym_Iter &operator=(const Elf_Sym_Iter &Other) {
+ EntitySize = Other.EntitySize;
+ Current = Other.Current;
+ return *this;
+ }
-template<support::endianness target_endianness, bool isRela>
-struct Elf_Rel_Impl<target_endianness, true, isRela>
- : Elf_Rel_Base<target_endianness, true, isRela> {
- using Elf_Rel_Base<target_endianness, true, isRela>::r_info;
- LLVM_ELF_IMPORT_TYPES(target_endianness, true)
+ 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;
+ }
- // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
- // and ELF64_R_INFO macros defined in the ELF specification:
- uint64_t getSymbol() const { return (r_info >> 32); }
- unsigned char getType() const {
- return (unsigned char) (r_info & 0xffffffffL);
- }
- void setSymbol(uint64_t s) { setSymbolAndType(s, getType()); }
- void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
- void setSymbolAndType(uint64_t s, unsigned char t) {
- r_info = (s << 32) + (t&0xffffffffL);
- }
-};
+ const char *get() const { return Current.getPointer(); }
-template<support::endianness target_endianness, bool isRela>
-struct Elf_Rel_Impl<target_endianness, false, isRela>
- : Elf_Rel_Base<target_endianness, false, isRela> {
- using Elf_Rel_Base<target_endianness, false, isRela>::r_info;
- LLVM_ELF_IMPORT_TYPES(target_endianness, 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() const { return (r_info >> 8); }
- unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
- void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); }
- void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
- void setSymbolAndType(uint32_t s, unsigned char t) {
- r_info = (s << 8) + t;
- }
-};
+ bool isDynamic() const { return Current.getInt(); }
+ uintX_t getEntSize() const { return EntitySize; }
-template<support::endianness target_endianness, bool is64Bits>
-class ELFObjectFile : public ObjectFile {
- LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
-
- typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
- typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
- typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
- typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
- typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
- typedef Elf_Verdef_Impl<target_endianness, is64Bits> Elf_Verdef;
- typedef Elf_Verdaux_Impl<target_endianness, is64Bits> Elf_Verdaux;
- typedef Elf_Verneed_Impl<target_endianness, is64Bits> Elf_Verneed;
- typedef Elf_Vernaux_Impl<target_endianness, is64Bits> Elf_Vernaux;
- typedef Elf_Versym_Impl<target_endianness, is64Bits> Elf_Versym;
- typedef DynRefImpl<target_endianness, is64Bits> DynRef;
- typedef content_iterator<DynRef> dyn_iterator;
-
-protected:
- struct Elf_Ehdr {
- unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
- Elf_Half e_type; // Type of file (see ET_*)
- Elf_Half e_machine; // Required architecture for this file (see EM_*)
- Elf_Word e_version; // Must be equal to 1
- Elf_Addr e_entry; // Address to jump to in order to start program
- Elf_Off e_phoff; // Program header table's file offset, in bytes
- Elf_Off e_shoff; // Section header table's file offset, in bytes
- Elf_Word e_flags; // Processor-specific flags
- Elf_Half e_ehsize; // Size of ELF header, in bytes
- Elf_Half e_phentsize;// Size of an entry in the program header table
- Elf_Half e_phnum; // Number of entries in the program header table
- Elf_Half e_shentsize;// Size of an entry in the section header table
- Elf_Half e_shnum; // Number of entries in the section header table
- Elf_Half e_shstrndx; // Section header table index of section name
- // string table
- bool checkMagic() const {
- return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
- }
- unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
- unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
+ private:
+ uintX_t EntitySize;
+ PointerIntPair<const char *, 1, bool,
+ ArchivePointerTypeTraits<const char> > Current;
};
- // This flag is used for classof, to distinguish ELFObjectFile from
- // its subclass. If more subclasses will be created, this flag will
- // have to become an enum.
- bool isDyldELFObject;
private:
- typedef SmallVector<const Elf_Shdr*, 1> Sections_t;
+ typedef SmallVector<const Elf_Shdr *, 2> Sections_t;
typedef DenseMap<unsigned, unsigned> IndexMap_t;
- typedef DenseMap<const Elf_Shdr*, SmallVector<uint32_t, 1> > RelocMap_t;
+
+ MemoryBuffer *Buf;
+
+ const uint8_t *base() const {
+ return reinterpret_cast<const uint8_t *>(Buf->getBufferStart());
+ }
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_dynstr_sec; // Dynamic symbol string table.
+ const Elf_Shdr *dot_symtab_sec; // Symbol table section.
- // SymbolTableSections[0] always points to the dynamic string table section
- // header, or NULL if there is no dynamic string table.
- Sections_t SymbolTableSections;
- IndexMap_t SymbolTableSectionsIndexMap;
- DenseMap<const Elf_Sym*, ELF::Elf64_Word> ExtendedSymbolTable;
+ const Elf_Shdr *SymbolTableSectionHeaderIndex;
+ DenseMap<const Elf_Sym *, ELF::Elf64_Word> ExtendedSymbolTable;
- const Elf_Shdr *dot_dynamic_sec; // .dynamic
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
+ /// \brief Represents a region described by entries in the .dynamic table.
+ struct DynRegionInfo {
+ DynRegionInfo() : Addr(nullptr), Size(0), EntSize(0) {}
+ /// \brief Address in current address space.
+ const void *Addr;
+ /// \brief Size in bytes of the region.
+ uintX_t Size;
+ /// \brief Size of each entity in the region.
+ uintX_t EntSize;
+ };
+
+ DynRegionInfo DynamicRegion;
+ DynRegionInfo DynHashRegion;
+ DynRegionInfo DynStrRegion;
+ DynRegionInfo DynSymRegion;
+
// Pointer to SONAME entry in dynamic string table
// This is set the first time getLoadName is called.
mutable const char *dt_soname;
public:
// If the integer is 0, this is an Elf_Verdef*.
// If the integer is 1, this is an Elf_Vernaux*.
- VersionMapEntry() : PointerIntPair<const void*, 1>(NULL, 0) { }
+ VersionMapEntry() : PointerIntPair<const void*, 1>(nullptr, 0) { }
VersionMapEntry(const Elf_Verdef *verdef)
: PointerIntPair<const void*, 1>(verdef, 0) { }
VersionMapEntry(const Elf_Vernaux *vernaux)
: PointerIntPair<const void*, 1>(vernaux, 1) { }
- bool isNull() const { return getPointer() == NULL; }
+ bool isNull() const { return getPointer() == nullptr; }
bool isVerdef() const { return !isNull() && getInt() == 0; }
bool isVernaux() const { return !isNull() && getInt() == 1; }
const Elf_Verdef *getVerdef() const {
- return isVerdef() ? (const Elf_Verdef*)getPointer() : NULL;
+ return isVerdef() ? (const Elf_Verdef*)getPointer() : nullptr;
}
const Elf_Vernaux *getVernaux() const {
- return isVernaux() ? (const Elf_Vernaux*)getPointer() : NULL;
+ return isVernaux() ? (const Elf_Vernaux*)getPointer() : nullptr;
}
};
mutable SmallVector<VersionMapEntry, 16> VersionMap;
void LoadVersionNeeds(const Elf_Shdr *ec) const;
void LoadVersionMap() const;
- /// @brief Map sections to an array of relocation sections that reference
- /// them sorted by section index.
- RelocMap_t SectionRelocMap;
-
- /// @brief Get the relocation section that contains \a Rel.
- const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
- return getSection(Rel.w.b);
- }
-
- bool isRelocationHasAddend(DataRefImpl Rel) const;
- template<typename T>
- const T *getEntry(uint16_t Section, uint32_t Entry) const;
+public:
template<typename T>
- const T *getEntry(const Elf_Shdr *Section, uint32_t Entry) const;
- const Elf_Shdr *getSection(DataRefImpl index) const;
- const Elf_Shdr *getSection(uint32_t index) const;
- const Elf_Rel *getRel(DataRefImpl Rel) const;
- const Elf_Rela *getRela(DataRefImpl Rela) const;
+ 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;
- error_code getSymbolName(const Elf_Shdr *section,
- const Elf_Sym *Symb,
- StringRef &Res) const;
- error_code getSymbolVersion(const Elf_Shdr *section,
- const Elf_Sym *Symb,
- StringRef &Version,
- bool &IsDefault) const;
+ const char *getDynamicString(uintX_t Offset) const;
+ ErrorOr<StringRef> getSymbolVersion(const Elf_Shdr *section,
+ const Elf_Sym *Symb,
+ bool &IsDefault) const;
void VerifyStrTab(const Elf_Shdr *sh) const;
-protected:
- const Elf_Sym *getSymbol(DataRefImpl Symb) const; // FIXME: Should be private?
- void validateSymbol(DataRefImpl Symb) const;
+ StringRef getRelocationTypeName(uint32_t Type) const;
+ void getRelocationTypeName(uint32_t Type,
+ SmallVectorImpl<char> &Result) const;
-public:
- const Elf_Dyn *getDyn(DataRefImpl DynData) const;
- error_code getSymbolVersion(SymbolRef Symb, StringRef &Version,
- bool &IsDefault) const;
-protected:
- virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
- virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
- virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
- virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
- virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
- virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
- virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
- virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
- virtual error_code getSymbolSection(DataRefImpl Symb,
- section_iterator &Res) const;
-
- friend class DynRefImpl<target_endianness, is64Bits>;
- virtual error_code getDynNext(DataRefImpl DynData, DynRef &Result) const;
-
- virtual error_code getLibraryNext(DataRefImpl Data, LibraryRef &Result) const;
- virtual error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const;
-
- virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
- virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
- virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
- virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
- virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
- virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
- virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
- virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
- virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
- virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
- bool &Res) const;
- virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
- virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
- virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
- bool &Result) const;
- virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
- virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;
-
- virtual error_code getRelocationNext(DataRefImpl Rel,
- RelocationRef &Res) const;
- virtual error_code getRelocationAddress(DataRefImpl Rel,
- uint64_t &Res) const;
- virtual error_code getRelocationOffset(DataRefImpl Rel,
- uint64_t &Res) const;
- virtual error_code getRelocationSymbol(DataRefImpl Rel,
- SymbolRef &Res) const;
- virtual error_code getRelocationType(DataRefImpl Rel,
- uint64_t &Res) const;
- virtual error_code getRelocationTypeName(DataRefImpl Rel,
- SmallVectorImpl<char> &Result) const;
- virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
- int64_t &Res) const;
- virtual error_code getRelocationValueString(DataRefImpl Rel,
- SmallVectorImpl<char> &Result) const;
+ /// \brief Get the symbol table section and symbol for a given relocation.
+ template <class RelT>
+ std::pair<const Elf_Shdr *, const Elf_Sym *>
+ getRelocationSymbol(const Elf_Shdr *RelSec, const RelT *Rel) const;
-public:
- ELFObjectFile(MemoryBuffer *Object, error_code &ec);
- virtual symbol_iterator begin_symbols() const;
- virtual symbol_iterator end_symbols() const;
+ ELFFile(MemoryBuffer *Object, error_code &ec);
+
+ bool isMips64EL() const {
+ return Header->e_machine == ELF::EM_MIPS &&
+ Header->getFileClass() == ELF::ELFCLASS64 &&
+ Header->getDataEncoding() == ELF::ELFDATA2LSB;
+ }
+
+ Elf_Shdr_Iter begin_sections() const;
+ Elf_Shdr_Iter end_sections() const;
- virtual symbol_iterator begin_dynamic_symbols() const;
- virtual symbol_iterator end_dynamic_symbols() const;
+ Elf_Sym_Iter begin_symbols() const;
+ Elf_Sym_Iter end_symbols() const;
- virtual section_iterator begin_sections() const;
- virtual section_iterator end_sections() const;
+ Elf_Dyn_Iter begin_dynamic_table() 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;
- virtual library_iterator begin_libraries_needed() const;
- virtual library_iterator end_libraries_needed() const;
+ 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_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);
+ }
- virtual dyn_iterator begin_dynamic_table() const;
- virtual dyn_iterator end_dynamic_table() const;
+ Elf_Rela_Iter begin_rela(const Elf_Shdr *sec) const {
+ return Elf_Rela_Iter(sec->sh_entsize,
+ (const char *)(base() + sec->sh_offset));
+ }
- virtual uint8_t getBytesInAddress() const;
- virtual StringRef getFileFormatName() const;
- virtual StringRef getObjectType() const { return "ELF"; }
- virtual unsigned getArch() const;
- virtual StringRef getLoadName() const;
+ Elf_Rela_Iter end_rela(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 {
+ return Elf_Rel_Iter(sec->sh_entsize,
+ (const char *)(base() + sec->sh_offset));
+ }
+
+ Elf_Rel_Iter end_rel(const Elf_Shdr *sec) const {
+ return Elf_Rel_Iter(sec->sh_entsize,
+ (const char *)(base() + sec->sh_offset + sec->sh_size));
+ }
+
+ /// \brief Iterate over program header table.
+ typedef ELFEntityIterator<const Elf_Phdr> Elf_Phdr_Iter;
+
+ Elf_Phdr_Iter begin_program_headers() const {
+ return Elf_Phdr_Iter(Header->e_phentsize,
+ (const char*)base() + Header->e_phoff);
+ }
+
+ Elf_Phdr_Iter end_program_headers() const {
+ return Elf_Phdr_Iter(Header->e_phentsize,
+ (const char*)base() +
+ Header->e_phoff +
+ (Header->e_phnum * Header->e_phentsize));
+ }
uint64_t getNumSections() const;
- uint64_t getStringTableIndex() const;
+ uintX_t getStringTableIndex() const;
ELF::Elf64_Word getSymbolTableIndex(const Elf_Sym *symb) const;
+ const Elf_Ehdr *getHeader() const { return Header; }
const Elf_Shdr *getSection(const Elf_Sym *symb) const;
-
- // Methods for type inquiry through isa, cast, and dyn_cast
- bool isDyldType() const { return isDyldELFObject; }
- static inline bool classof(const Binary *v) {
- return v->getType() == getELFType(target_endianness == support::little,
- is64Bits);
- }
- static inline bool classof(const ELFObjectFile *v) { return true; }
+ const Elf_Shdr *getSection(uint32_t Index) const;
+ const Elf_Sym *getSymbol(uint32_t index) const;
+
+ ErrorOr<StringRef> getSymbolName(Elf_Sym_Iter Sym) 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;
};
+// Use an alignment of 2 for the typedefs since that is the worst case for
+// ELF files in archives.
+typedef ELFFile<ELFType<support::little, 2, false> > ELF32LEFile;
+typedef ELFFile<ELFType<support::little, 2, true> > ELF64LEFile;
+typedef ELFFile<ELFType<support::big, 2, false> > ELF32BEFile;
+typedef ELFFile<ELFType<support::big, 2, true> > ELF64BEFile;
+
// Iterate through the version definitions, and place each Elf_Verdef
// in the VersionMap according to its index.
-template<support::endianness target_endianness, bool is64Bits>
-void ELFObjectFile<target_endianness, is64Bits>::
- LoadVersionDefs(const Elf_Shdr *sec) const {
- unsigned vd_size = sec->sh_size; // Size of section in bytes
+template <class ELFT>
+void ELFFile<ELFT>::LoadVersionDefs(const Elf_Shdr *sec) const {
+ unsigned vd_size = sec->sh_size; // Size of section in bytes
unsigned vd_count = sec->sh_info; // Number of Verdef entries
const char *sec_start = (const char*)base() + sec->sh_offset;
const char *sec_end = sec_start + vd_size;
report_fatal_error("Unexpected verdef version");
size_t index = vd->vd_ndx & ELF::VERSYM_VERSION;
if (index >= VersionMap.size())
- VersionMap.resize(index+1);
+ VersionMap.resize(index + 1);
VersionMap[index] = VersionMapEntry(vd);
p += vd->vd_next;
}
// Iterate through the versions needed section, and place each Elf_Vernaux
// in the VersionMap according to its index.
-template<support::endianness target_endianness, bool is64Bits>
-void ELFObjectFile<target_endianness, is64Bits>::
- LoadVersionNeeds(const Elf_Shdr *sec) const {
- unsigned vn_size = sec->sh_size; // Size of section in bytes
+template <class ELFT>
+void ELFFile<ELFT>::LoadVersionNeeds(const Elf_Shdr *sec) const {
+ unsigned vn_size = sec->sh_size; // Size of section in bytes
unsigned vn_count = sec->sh_info; // Number of Verneed entries
- const char *sec_start = (const char*)base() + sec->sh_offset;
+ const char *sec_start = (const char *)base() + sec->sh_offset;
const char *sec_end = sec_start + vn_size;
// The first Verneed entry is at the start of the section.
const char *p = sec_start;
const Elf_Vernaux *vna = reinterpret_cast<const Elf_Vernaux *>(paux);
size_t index = vna->vna_other & ELF::VERSYM_VERSION;
if (index >= VersionMap.size())
- VersionMap.resize(index+1);
+ VersionMap.resize(index + 1);
VersionMap[index] = VersionMapEntry(vna);
paux += vna->vna_next;
}
}
}
-template<support::endianness target_endianness, bool is64Bits>
-void ELFObjectFile<target_endianness, is64Bits>::LoadVersionMap() const {
+template <class ELFT>
+void ELFFile<ELFT>::LoadVersionMap() const {
// If there is no dynamic symtab or version table, there is nothing to do.
- if (SymbolTableSections[0] == NULL || dot_gnu_version_sec == NULL)
+ if (!DynSymRegion.Addr || !dot_gnu_version_sec)
return;
// Has the VersionMap already been loaded?
LoadVersionNeeds(dot_gnu_version_r_sec);
}
-template<support::endianness target_endianness, bool is64Bits>
-void ELFObjectFile<target_endianness, is64Bits>
- ::validateSymbol(DataRefImpl Symb) const {
- const Elf_Sym *symb = getSymbol(Symb);
- const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
- // FIXME: We really need to do proper error handling in the case of an invalid
- // input file. Because we don't use exceptions, I think we'll just pass
- // an error object around.
- if (!( symb
- && SymbolTableSection
- && symb >= (const Elf_Sym*)(base()
- + SymbolTableSection->sh_offset)
- && symb < (const Elf_Sym*)(base()
- + SymbolTableSection->sh_offset
- + SymbolTableSection->sh_size)))
- // FIXME: Proper error handling.
- report_fatal_error("Symb must point to a valid symbol!");
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolNext(DataRefImpl Symb,
- SymbolRef &Result) const {
- validateSymbol(Symb);
- const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
-
- ++Symb.d.a;
- // Check to see if we are at the end of this symbol table.
- if (Symb.d.a >= SymbolTableSection->getEntityCount()) {
- // We are at the end. If there are other symbol tables, jump to them.
- // If the symbol table is .dynsym, we are iterating dynamic symbols,
- // and there is only one table of these.
- if (Symb.d.b != 0) {
- ++Symb.d.b;
- Symb.d.a = 1; // The 0th symbol in ELF is fake.
- }
- // Otherwise return the terminator.
- if (Symb.d.b == 0 || Symb.d.b >= SymbolTableSections.size()) {
- Symb.d.a = std::numeric_limits<uint32_t>::max();
- Symb.d.b = std::numeric_limits<uint32_t>::max();
- }
- }
-
- Result = SymbolRef(Symb, this);
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolName(DataRefImpl Symb,
- StringRef &Result) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
- return getSymbolName(SymbolTableSections[Symb.d.b], symb, Result);
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolVersion(SymbolRef SymRef,
- StringRef &Version,
- bool &IsDefault) const {
- DataRefImpl Symb = SymRef.getRawDataRefImpl();
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
- return getSymbolVersion(SymbolTableSections[Symb.d.b], symb,
- Version, IsDefault);
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-ELF::Elf64_Word ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolTableIndex(const Elf_Sym *symb) 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;
}
-template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
-ELFObjectFile<target_endianness, is64Bits>
- ::getSection(const Elf_Sym *symb) const {
+template <class ELFT>
+const typename ELFFile<ELFT>::Elf_Shdr *
+ELFFile<ELFT>::getSection(const Elf_Sym *symb) const {
if (symb->st_shndx == ELF::SHN_XINDEX)
return getSection(ExtendedSymbolTable.lookup(symb));
if (symb->st_shndx >= ELF::SHN_LORESERVE)
- return 0;
+ return nullptr;
return getSection(symb->st_shndx);
}
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolFileOffset(DataRefImpl Symb,
- uint64_t &Result) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
- const Elf_Shdr *Section;
- switch (getSymbolTableIndex(symb)) {
- case ELF::SHN_COMMON:
- // Unintialized symbols have no offset in the object file
- case ELF::SHN_UNDEF:
- Result = UnknownAddressOrSize;
- return object_error::success;
- case ELF::SHN_ABS:
- Result = symb->st_value;
- return object_error::success;
- default: Section = getSection(symb);
- }
-
- switch (symb->getType()) {
- case ELF::STT_SECTION:
- Result = Section ? Section->sh_addr : UnknownAddressOrSize;
- return object_error::success;
- case ELF::STT_FUNC:
- case ELF::STT_OBJECT:
- case ELF::STT_NOTYPE:
- Result = symb->st_value +
- (Section ? Section->sh_offset : 0);
- return object_error::success;
- default:
- Result = UnknownAddressOrSize;
- return object_error::success;
- }
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolAddress(DataRefImpl Symb,
- uint64_t &Result) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
- const Elf_Shdr *Section;
- switch (getSymbolTableIndex(symb)) {
- case ELF::SHN_COMMON:
- case ELF::SHN_UNDEF:
- Result = UnknownAddressOrSize;
- return object_error::success;
- case ELF::SHN_ABS:
- Result = symb->st_value;
- return object_error::success;
- default: Section = getSection(symb);
- }
-
- switch (symb->getType()) {
- case ELF::STT_SECTION:
- Result = Section ? Section->sh_addr : UnknownAddressOrSize;
- return object_error::success;
- case ELF::STT_FUNC:
- case ELF::STT_OBJECT:
- case ELF::STT_NOTYPE:
- Result = symb->st_value + (Section ? Section->sh_addr : 0);
- return object_error::success;
- default:
- Result = UnknownAddressOrSize;
- return object_error::success;
- }
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolSize(DataRefImpl Symb,
- uint64_t &Result) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
- if (symb->st_size == 0)
- Result = UnknownAddressOrSize;
- Result = symb->st_size;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolNMTypeChar(DataRefImpl Symb,
- char &Result) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
- const Elf_Shdr *Section = getSection(symb);
-
- char ret = '?';
-
- if (Section) {
- switch (Section->sh_type) {
- case ELF::SHT_PROGBITS:
- case ELF::SHT_DYNAMIC:
- switch (Section->sh_flags) {
- case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
- ret = 't'; break;
- case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
- ret = 'd'; break;
- case ELF::SHF_ALLOC:
- case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
- case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
- ret = 'r'; break;
- }
- break;
- case ELF::SHT_NOBITS: ret = 'b';
- }
- }
-
- switch (getSymbolTableIndex(symb)) {
- case ELF::SHN_UNDEF:
- if (ret == '?')
- ret = 'U';
- break;
- case ELF::SHN_ABS: ret = 'a'; break;
- case ELF::SHN_COMMON: ret = 'c'; break;
- }
-
- switch (symb->getBinding()) {
- case ELF::STB_GLOBAL: ret = ::toupper(ret); break;
- case ELF::STB_WEAK:
- if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
- ret = 'w';
- else
- if (symb->getType() == ELF::STT_OBJECT)
- ret = 'V';
- else
- ret = 'W';
- }
-
- if (ret == '?' && symb->getType() == ELF::STT_SECTION) {
- StringRef name;
- if (error_code ec = getSymbolName(Symb, name))
- return ec;
- Result = StringSwitch<char>(name)
- .StartsWith(".debug", 'N')
- .StartsWith(".note", 'n')
- .Default('?');
- return object_error::success;
- }
-
- Result = ret;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolType(DataRefImpl Symb,
- SymbolRef::Type &Result) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
-
- switch (symb->getType()) {
- case ELF::STT_NOTYPE:
- Result = SymbolRef::ST_Unknown;
- break;
- case ELF::STT_SECTION:
- Result = SymbolRef::ST_Debug;
- break;
- case ELF::STT_FILE:
- Result = SymbolRef::ST_File;
- break;
- case ELF::STT_FUNC:
- Result = SymbolRef::ST_Function;
- break;
- case ELF::STT_OBJECT:
- case ELF::STT_COMMON:
- case ELF::STT_TLS:
- Result = SymbolRef::ST_Data;
- break;
- default:
- Result = SymbolRef::ST_Other;
- break;
- }
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolFlags(DataRefImpl Symb,
- uint32_t &Result) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
-
- Result = SymbolRef::SF_None;
-
- if (symb->getBinding() != ELF::STB_LOCAL)
- Result |= SymbolRef::SF_Global;
-
- if (symb->getBinding() == ELF::STB_WEAK)
- Result |= SymbolRef::SF_Weak;
-
- if (symb->st_shndx == ELF::SHN_ABS)
- Result |= SymbolRef::SF_Absolute;
-
- if (symb->getType() == ELF::STT_FILE ||
- symb->getType() == ELF::STT_SECTION)
- Result |= SymbolRef::SF_FormatSpecific;
-
- if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
- Result |= SymbolRef::SF_Undefined;
-
- if (symb->getType() == ELF::STT_COMMON ||
- getSymbolTableIndex(symb) == ELF::SHN_COMMON)
- Result |= SymbolRef::SF_Common;
-
- if (symb->getType() == ELF::STT_TLS)
- Result |= SymbolRef::SF_ThreadLocal;
-
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolSection(DataRefImpl Symb,
- section_iterator &Res) const {
- validateSymbol(Symb);
- const Elf_Sym *symb = getSymbol(Symb);
- const Elf_Shdr *sec = getSection(symb);
- if (!sec)
- Res = end_sections();
- else {
- DataRefImpl Sec;
- Sec.p = reinterpret_cast<intptr_t>(sec);
- Res = section_iterator(SectionRef(Sec, this));
- }
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSectionNext(DataRefImpl Sec, SectionRef &Result) const {
- const uint8_t *sec = reinterpret_cast<const uint8_t *>(Sec.p);
- sec += Header->e_shentsize;
- Sec.p = reinterpret_cast<intptr_t>(sec);
- Result = SectionRef(Sec, this);
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSectionName(DataRefImpl Sec,
- StringRef &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- Result = StringRef(getString(dot_shstrtab_sec, sec->sh_name));
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSectionAddress(DataRefImpl Sec,
- uint64_t &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- Result = sec->sh_addr;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSectionSize(DataRefImpl Sec,
- uint64_t &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- Result = sec->sh_size;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSectionContents(DataRefImpl Sec,
- StringRef &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- const char *start = (const char*)base() + sec->sh_offset;
- Result = StringRef(start, sec->sh_size);
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSectionAlignment(DataRefImpl Sec,
- uint64_t &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- Result = sec->sh_addralign;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::isSectionText(DataRefImpl Sec,
- bool &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- if (sec->sh_flags & ELF::SHF_EXECINSTR)
- Result = true;
- else
- Result = false;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::isSectionData(DataRefImpl Sec,
- bool &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
- && sec->sh_type == ELF::SHT_PROGBITS)
- Result = true;
- else
- Result = false;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::isSectionBSS(DataRefImpl Sec,
- bool &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
- && sec->sh_type == ELF::SHT_NOBITS)
- Result = true;
- else
- Result = false;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::isSectionRequiredForExecution(DataRefImpl Sec,
- bool &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- if (sec->sh_flags & ELF::SHF_ALLOC)
- Result = true;
- else
- Result = false;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::isSectionVirtual(DataRefImpl Sec,
- bool &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- if (sec->sh_type == ELF::SHT_NOBITS)
- Result = true;
- else
- Result = false;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>::isSectionZeroInit(DataRefImpl Sec,
- bool &Result) const {
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- // For ELF, all zero-init sections are virtual (that is, they occupy no space
- // in the object image) and vice versa.
- if (sec->sh_flags & ELF::SHT_NOBITS)
- Result = true;
- else
- Result = false;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::sectionContainsSymbol(DataRefImpl Sec,
- DataRefImpl Symb,
- bool &Result) const {
- // FIXME: Unimplemented.
- Result = false;
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-relocation_iterator ELFObjectFile<target_endianness, is64Bits>
- ::getSectionRelBegin(DataRefImpl Sec) const {
- DataRefImpl RelData;
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
- if (sec != 0 && ittr != SectionRelocMap.end()) {
- RelData.w.a = getSection(ittr->second[0])->sh_info;
- RelData.w.b = ittr->second[0];
- RelData.w.c = 0;
- }
- return relocation_iterator(RelocationRef(RelData, this));
+template <class ELFT>
+const typename ELFFile<ELFT>::Elf_Sym *
+ELFFile<ELFT>::getSymbol(uint32_t Index) const {
+ return &*(begin_symbols() + Index);
}
-template<support::endianness target_endianness, bool is64Bits>
-relocation_iterator ELFObjectFile<target_endianness, is64Bits>
- ::getSectionRelEnd(DataRefImpl Sec) const {
- DataRefImpl RelData;
- const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
- typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
- if (sec != 0 && ittr != SectionRelocMap.end()) {
- // Get the index of the last relocation section for this section.
- std::size_t relocsecindex = ittr->second[ittr->second.size() - 1];
- const Elf_Shdr *relocsec = getSection(relocsecindex);
- RelData.w.a = relocsec->sh_info;
- RelData.w.b = relocsecindex;
- RelData.w.c = relocsec->sh_size / relocsec->sh_entsize;
- }
- return relocation_iterator(RelocationRef(RelData, this));
+template <class ELFT>
+ErrorOr<ArrayRef<uint8_t> >
+ELFFile<ELFT>::getSectionContents(const Elf_Shdr *Sec) const {
+ if (Sec->sh_offset + Sec->sh_size > Buf->getBufferSize())
+ return object_error::parse_failed;
+ const uint8_t *Start = base() + Sec->sh_offset;
+ return ArrayRef<uint8_t>(Start, Sec->sh_size);
}
-// Relocations
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationNext(DataRefImpl Rel,
- RelocationRef &Result) const {
- ++Rel.w.c;
- const Elf_Shdr *relocsec = getSection(Rel.w.b);
- if (Rel.w.c >= (relocsec->sh_size / relocsec->sh_entsize)) {
- // We have reached the end of the relocations for this section. See if there
- // is another relocation section.
- typename RelocMap_t::mapped_type relocseclist =
- SectionRelocMap.lookup(getSection(Rel.w.a));
-
- // Do a binary search for the current reloc section index (which must be
- // present). Then get the next one.
- typename RelocMap_t::mapped_type::const_iterator loc =
- std::lower_bound(relocseclist.begin(), relocseclist.end(), Rel.w.b);
- ++loc;
-
- // If there is no next one, don't do anything. The ++Rel.w.c above sets Rel
- // to the end iterator.
- if (loc != relocseclist.end()) {
- Rel.w.b = *loc;
- Rel.w.a = 0;
- }
- }
- Result = RelocationRef(Rel, this);
- return object_error::success;
+template <class ELFT>
+StringRef ELFFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
+ return getELFRelocationTypeName(Header->e_machine, Type);
}
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationSymbol(DataRefImpl Rel,
- SymbolRef &Result) const {
- uint32_t symbolIdx;
- const Elf_Shdr *sec = getSection(Rel.w.b);
- switch (sec->sh_type) {
- default :
- report_fatal_error("Invalid section type in Rel!");
- case ELF::SHT_REL : {
- symbolIdx = getRel(Rel)->getSymbol();
- break;
- }
- case ELF::SHT_RELA : {
- symbolIdx = getRela(Rel)->getSymbol();
- break;
- }
- }
- DataRefImpl SymbolData;
- IndexMap_t::const_iterator it = SymbolTableSectionsIndexMap.find(sec->sh_link);
- if (it == SymbolTableSectionsIndexMap.end())
- report_fatal_error("Relocation symbol table not found!");
- SymbolData.d.a = symbolIdx;
- SymbolData.d.b = it->second;
- Result = SymbolRef(SymbolData, this);
- return object_error::success;
-}
+template <class ELFT>
+void ELFFile<ELFT>::getRelocationTypeName(uint32_t Type,
+ SmallVectorImpl<char> &Result) const {
+ if (!isMips64EL()) {
+ StringRef Name = getRelocationTypeName(Type);
+ Result.append(Name.begin(), Name.end());
+ } else {
+ uint8_t Type1 = (Type >> 0) & 0xFF;
+ uint8_t Type2 = (Type >> 8) & 0xFF;
+ uint8_t Type3 = (Type >> 16) & 0xFF;
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationAddress(DataRefImpl Rel,
- uint64_t &Result) const {
- uint64_t offset;
- const Elf_Shdr *sec = getSection(Rel.w.b);
- switch (sec->sh_type) {
- default :
- report_fatal_error("Invalid section type in Rel!");
- case ELF::SHT_REL : {
- offset = getRel(Rel)->r_offset;
- break;
- }
- case ELF::SHT_RELA : {
- offset = getRela(Rel)->r_offset;
- break;
- }
- }
+ // Concat all three relocation type names.
+ StringRef Name = getRelocationTypeName(Type1);
+ Result.append(Name.begin(), Name.end());
- Result = offset;
- return object_error::success;
-}
+ Name = getRelocationTypeName(Type2);
+ Result.append(1, '/');
+ Result.append(Name.begin(), Name.end());
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationOffset(DataRefImpl Rel,
- uint64_t &Result) const {
- uint64_t offset;
- const Elf_Shdr *sec = getSection(Rel.w.b);
- switch (sec->sh_type) {
- default :
- report_fatal_error("Invalid section type in Rel!");
- case ELF::SHT_REL : {
- offset = getRel(Rel)->r_offset;
- break;
- }
- case ELF::SHT_RELA : {
- offset = getRela(Rel)->r_offset;
- break;
- }
+ Name = getRelocationTypeName(Type3);
+ Result.append(1, '/');
+ Result.append(Name.begin(), Name.end());
}
-
- Result = offset - sec->sh_addr;
- return object_error::success;
}
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationType(DataRefImpl Rel,
- uint64_t &Result) const {
- const Elf_Shdr *sec = getSection(Rel.w.b);
- switch (sec->sh_type) {
- default :
- report_fatal_error("Invalid section type in Rel!");
- case ELF::SHT_REL : {
- Result = getRel(Rel)->getType();
- break;
- }
- case ELF::SHT_RELA : {
- Result = getRela(Rel)->getType();
- break;
- }
- }
- return object_error::success;
+template <class ELFT>
+template <class RelT>
+std::pair<const typename ELFFile<ELFT>::Elf_Shdr *,
+ const typename ELFFile<ELFT>::Elf_Sym *>
+ELFFile<ELFT>::getRelocationSymbol(const Elf_Shdr *Sec, const RelT *Rel) const {
+ if (!Sec->sh_link)
+ return std::make_pair((const Elf_Shdr *)0, (const Elf_Sym *)0);
+ const Elf_Shdr *SymTable = getSection(Sec->sh_link);
+ return std::make_pair(
+ SymTable, getEntry<Elf_Sym>(SymTable, Rel->getSymbol(isMips64EL())));
}
-#define LLVM_ELF_SWITCH_RELOC_TYPE_NAME(enum) \
- case ELF::enum: res = #enum; break;
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationTypeName(DataRefImpl Rel,
- SmallVectorImpl<char> &Result) const {
- const Elf_Shdr *sec = getSection(Rel.w.b);
- uint8_t type;
- StringRef res;
- switch (sec->sh_type) {
- default :
- return object_error::parse_failed;
- case ELF::SHT_REL : {
- type = getRel(Rel)->getType();
- break;
- }
- case ELF::SHT_RELA : {
- type = getRela(Rel)->getType();
- break;
- }
- }
- switch (Header->e_machine) {
- case ELF::EM_X86_64:
- switch (type) {
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_NONE);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_64);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOT32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PLT32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_COPY);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GLOB_DAT);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_JUMP_SLOT);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_RELATIVE);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPCREL);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32S);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_16);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC16);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_8);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC8);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPMOD64);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF64);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF64);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSGD);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSLD);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTTPOFF);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC64);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTOFF64);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE64);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32_TLSDESC);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC_CALL);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC);
- default:
- res = "Unknown";
- }
- break;
- case ELF::EM_386:
- switch (type) {
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_NONE);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOT32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PLT32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_COPY);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GLOB_DAT);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_JUMP_SLOT);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_RELATIVE);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTOFF);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTPC);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32PLT);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTIE);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_16);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC16);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_8);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC8);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_PUSH);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_CALL);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_POP);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_PUSH);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_CALL);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_POP);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDO_32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE_32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE_32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPMOD32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPOFF32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF32);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTDESC);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC_CALL);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC);
- LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_IRELATIVE);
- default:
- res = "Unknown";
- }
- break;
- default:
- res = "Unknown";
- }
- Result.append(res.begin(), res.end());
- return object_error::success;
+// 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!");
}
-#undef LLVM_ELF_SWITCH_RELOC_TYPE_NAME
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationAdditionalInfo(DataRefImpl Rel,
- int64_t &Result) const {
- const Elf_Shdr *sec = getSection(Rel.w.b);
- switch (sec->sh_type) {
- default :
- report_fatal_error("Invalid section type in Rel!");
- case ELF::SHT_REL : {
- Result = 0;
- return object_error::success;
- }
- case ELF::SHT_RELA : {
- Result = getRela(Rel)->r_addend;
- return object_error::success;
- }
+template <class ELFT>
+uint64_t ELFFile<ELFT>::getNumSections() const {
+ assert(Header && "Header not initialized!");
+ if (Header->e_shnum == ELF::SHN_UNDEF) {
+ assert(SectionHeaderTable && "SectionHeaderTable not initialized!");
+ return SectionHeaderTable->sh_size;
}
+ return Header->e_shnum;
}
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getRelocationValueString(DataRefImpl Rel,
- SmallVectorImpl<char> &Result) const {
- const Elf_Shdr *sec = getSection(Rel.w.b);
- uint8_t type;
- StringRef res;
- int64_t addend = 0;
- uint16_t symbol_index = 0;
- switch (sec->sh_type) {
- default :
- return object_error::parse_failed;
- case ELF::SHT_REL : {
- type = getRel(Rel)->getType();
- symbol_index = getRel(Rel)->getSymbol();
- // TODO: Read implicit addend from section data.
- break;
- }
- case ELF::SHT_RELA : {
- type = getRela(Rel)->getType();
- symbol_index = getRela(Rel)->getSymbol();
- addend = getRela(Rel)->r_addend;
- break;
- }
- }
- const Elf_Sym *symb = getEntry<Elf_Sym>(sec->sh_link, symbol_index);
- StringRef symname;
- if (error_code ec = getSymbolName(getSection(sec->sh_link), symb, symname))
- return ec;
- switch (Header->e_machine) {
- case ELF::EM_X86_64:
- switch (type) {
- case ELF::R_X86_64_32S:
- res = symname;
- break;
- case ELF::R_X86_64_PC32: {
- std::string fmtbuf;
- raw_string_ostream fmt(fmtbuf);
- fmt << symname << (addend < 0 ? "" : "+") << addend << "-P";
- fmt.flush();
- Result.append(fmtbuf.begin(), fmtbuf.end());
- }
- break;
- default:
- res = "Unknown";
- }
- break;
- default:
- res = "Unknown";
+template <class ELFT>
+typename ELFFile<ELFT>::uintX_t ELFFile<ELFT>::getStringTableIndex() const {
+ if (Header->e_shnum == ELF::SHN_UNDEF) {
+ if (Header->e_shstrndx == ELF::SHN_HIRESERVE)
+ return SectionHeaderTable->sh_link;
+ if (Header->e_shstrndx >= getNumSections())
+ return 0;
}
- if (Result.empty())
- Result.append(res.begin(), res.end());
- return object_error::success;
-}
-
-// Verify that the last byte in the string table in a null.
-template<support::endianness target_endianness, bool is64Bits>
-void ELFObjectFile<target_endianness, is64Bits>
- ::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!");
+ return Header->e_shstrndx;
}
-template<support::endianness target_endianness, bool is64Bits>
-ELFObjectFile<target_endianness, is64Bits>::ELFObjectFile(MemoryBuffer *Object
- , error_code &ec)
- : ObjectFile(getELFType(target_endianness == support::little, is64Bits),
- Object, ec)
- , isDyldELFObject(false)
- , SectionHeaderTable(0)
- , dot_shstrtab_sec(0)
- , dot_strtab_sec(0)
- , dot_dynstr_sec(0)
- , dot_dynamic_sec(0)
- , dot_gnu_version_sec(0)
- , dot_gnu_version_r_sec(0)
- , dot_gnu_version_d_sec(0)
- , dt_soname(0)
- {
-
- const uint64_t FileSize = Data->getBufferSize();
+template <class ELFT>
+ELFFile<ELFT>::ELFFile(MemoryBuffer *Object, error_code &ec)
+ : Buf(Object),
+ SectionHeaderTable(0),
+ dot_shstrtab_sec(0),
+ dot_strtab_sec(0),
+ dot_symtab_sec(0),
+ SymbolTableSectionHeaderIndex(0),
+ dot_gnu_version_sec(0),
+ dot_gnu_version_r_sec(0),
+ dot_gnu_version_d_sec(0),
+ dt_soname(nullptr) {
+ const uint64_t FileSize = Buf->getBufferSize();
if (sizeof(Elf_Ehdr) > FileSize)
// FIXME: Proper error handling.
// FIXME: Proper error handling.
report_fatal_error("Section table goes past end of file!");
- // To find the symbol tables we walk the section table to find SHT_SYMTAB.
- const Elf_Shdr* SymbolTableSectionHeaderIndex = 0;
- const Elf_Shdr* sh = SectionHeaderTable;
-
- // Reserve SymbolTableSections[0] for .dynsym
- SymbolTableSections.push_back(NULL);
+ // Scan sections for special sections.
- for (uint64_t i = 0, e = getNumSections(); i != e; ++i) {
- switch (sh->sh_type) {
- case ELF::SHT_SYMTAB_SHNDX: {
+ for (Elf_Shdr_Iter SecI = begin_sections(), SecE = end_sections();
+ SecI != SecE; ++SecI) {
+ switch (SecI->sh_type) {
+ case ELF::SHT_SYMTAB_SHNDX:
if (SymbolTableSectionHeaderIndex)
// FIXME: Proper error handling.
report_fatal_error("More than one .symtab_shndx!");
- SymbolTableSectionHeaderIndex = sh;
+ SymbolTableSectionHeaderIndex = &*SecI;
break;
- }
- case ELF::SHT_SYMTAB: {
- SymbolTableSectionsIndexMap[i] = SymbolTableSections.size();
- SymbolTableSections.push_back(sh);
+ case ELF::SHT_SYMTAB:
+ if (dot_symtab_sec)
+ // FIXME: Proper error handling.
+ report_fatal_error("More than one .symtab!");
+ dot_symtab_sec = &*SecI;
+ dot_strtab_sec = getSection(SecI->sh_link);
break;
- }
case ELF::SHT_DYNSYM: {
- if (SymbolTableSections[0] != NULL)
+ if (DynSymRegion.Addr)
// FIXME: Proper error handling.
report_fatal_error("More than one .dynsym!");
- SymbolTableSectionsIndexMap[i] = 0;
- SymbolTableSections[0] = sh;
+ DynSymRegion.Addr = base() + SecI->sh_offset;
+ DynSymRegion.Size = SecI->sh_size;
+ DynSymRegion.EntSize = SecI->sh_entsize;
+ const Elf_Shdr *DynStr = getSection(SecI->sh_link);
+ DynStrRegion.Addr = base() + DynStr->sh_offset;
+ DynStrRegion.Size = DynStr->sh_size;
+ DynStrRegion.EntSize = DynStr->sh_entsize;
break;
}
- case ELF::SHT_REL:
- case ELF::SHT_RELA: {
- SectionRelocMap[getSection(sh->sh_info)].push_back(i);
- break;
- }
- case ELF::SHT_DYNAMIC: {
- if (dot_dynamic_sec != NULL)
+ case ELF::SHT_DYNAMIC:
+ if (DynamicRegion.Addr)
// FIXME: Proper error handling.
report_fatal_error("More than one .dynamic!");
- dot_dynamic_sec = sh;
+ DynamicRegion.Addr = base() + SecI->sh_offset;
+ DynamicRegion.Size = SecI->sh_size;
+ DynamicRegion.EntSize = SecI->sh_entsize;
break;
- }
- case ELF::SHT_GNU_versym: {
+ case ELF::SHT_GNU_versym:
if (dot_gnu_version_sec != NULL)
// FIXME: Proper error handling.
report_fatal_error("More than one .gnu.version section!");
- dot_gnu_version_sec = sh;
+ dot_gnu_version_sec = &*SecI;
break;
- }
- case ELF::SHT_GNU_verdef: {
+ case ELF::SHT_GNU_verdef:
if (dot_gnu_version_d_sec != NULL)
// FIXME: Proper error handling.
report_fatal_error("More than one .gnu.version_d section!");
- dot_gnu_version_d_sec = sh;
+ dot_gnu_version_d_sec = &*SecI;
break;
- }
- case ELF::SHT_GNU_verneed: {
+ case ELF::SHT_GNU_verneed:
if (dot_gnu_version_r_sec != NULL)
// FIXME: Proper error handling.
report_fatal_error("More than one .gnu.version_r section!");
- dot_gnu_version_r_sec = sh;
+ dot_gnu_version_r_sec = &*SecI;
break;
}
- }
- ++sh;
- }
-
- // Sort section relocation lists by index.
- for (typename RelocMap_t::iterator i = SectionRelocMap.begin(),
- e = SectionRelocMap.end(); i != e; ++i) {
- std::sort(i->second.begin(), i->second.end());
}
// Get string table sections.
VerifyStrTab(dot_shstrtab_sec);
}
- // Merge this into the above loop.
- for (const char *i = reinterpret_cast<const char *>(SectionHeaderTable),
- *e = i + getNumSections() * Header->e_shentsize;
- i != e; i += Header->e_shentsize) {
- const Elf_Shdr *sh = reinterpret_cast<const Elf_Shdr*>(i);
- if (sh->sh_type == ELF::SHT_STRTAB) {
- StringRef SectionName(getString(dot_shstrtab_sec, sh->sh_name));
- if (SectionName == ".strtab") {
- if (dot_strtab_sec != 0)
- // FIXME: Proper error handling.
- report_fatal_error("Already found section named .strtab!");
- dot_strtab_sec = sh;
- VerifyStrTab(dot_strtab_sec);
- } else if (SectionName == ".dynstr") {
- if (dot_dynstr_sec != 0)
- // FIXME: Proper error handling.
- report_fatal_error("Already found section named .dynstr!");
- dot_dynstr_sec = sh;
- VerifyStrTab(dot_dynstr_sec);
- }
- }
- }
-
// Build symbol name side-mapping if there is one.
if (SymbolTableSectionHeaderIndex) {
const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() +
SymbolTableSectionHeaderIndex->sh_offset);
- error_code ec;
- for (symbol_iterator si = begin_symbols(),
- se = end_symbols(); si != se; si.increment(ec)) {
- if (ec)
- report_fatal_error("Fewer extended symbol table entries than symbols!");
+ for (Elf_Sym_Iter SI = begin_symbols(), SE = end_symbols(); SI != SE;
+ ++SI) {
if (*ShndxTable != ELF::SHN_UNDEF)
- ExtendedSymbolTable[getSymbol(si->getRawDataRefImpl())] = *ShndxTable;
+ ExtendedSymbolTable[&*SI] = *ShndxTable;
++ShndxTable;
}
}
-}
-template<support::endianness target_endianness, bool is64Bits>
-symbol_iterator ELFObjectFile<target_endianness, is64Bits>
- ::begin_symbols() const {
- DataRefImpl SymbolData;
- if (SymbolTableSections.size() <= 1) {
- SymbolData.d.a = std::numeric_limits<uint32_t>::max();
- SymbolData.d.b = std::numeric_limits<uint32_t>::max();
- } else {
- SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
- SymbolData.d.b = 1; // The 0th table is .dynsym
+ // Scan program headers.
+ for (Elf_Phdr_Iter PhdrI = begin_program_headers(),
+ PhdrE = end_program_headers();
+ PhdrI != PhdrE; ++PhdrI) {
+ if (PhdrI->p_type == ELF::PT_DYNAMIC) {
+ DynamicRegion.Addr = base() + PhdrI->p_offset;
+ DynamicRegion.Size = PhdrI->p_filesz;
+ DynamicRegion.EntSize = sizeof(Elf_Dyn);
+ break;
+ }
}
- return symbol_iterator(SymbolRef(SymbolData, this));
-}
-template<support::endianness target_endianness, bool is64Bits>
-symbol_iterator ELFObjectFile<target_endianness, is64Bits>
- ::end_symbols() const {
- DataRefImpl SymbolData;
- SymbolData.d.a = std::numeric_limits<uint32_t>::max();
- SymbolData.d.b = std::numeric_limits<uint32_t>::max();
- return symbol_iterator(SymbolRef(SymbolData, this));
+ ec = error_code::success();
}
-template<support::endianness target_endianness, bool is64Bits>
-symbol_iterator ELFObjectFile<target_endianness, is64Bits>
- ::begin_dynamic_symbols() const {
- DataRefImpl SymbolData;
- if (SymbolTableSections[0] == NULL) {
- SymbolData.d.a = std::numeric_limits<uint32_t>::max();
- SymbolData.d.b = std::numeric_limits<uint32_t>::max();
- } else {
- SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
- SymbolData.d.b = 0; // The 0th table is .dynsym
- }
- return symbol_iterator(SymbolRef(SymbolData, this));
+// 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;
}
-template<support::endianness target_endianness, bool is64Bits>
-symbol_iterator ELFObjectFile<target_endianness, is64Bits>
- ::end_dynamic_symbols() const {
- DataRefImpl SymbolData;
- SymbolData.d.a = std::numeric_limits<uint32_t>::max();
- SymbolData.d.b = std::numeric_limits<uint32_t>::max();
- return symbol_iterator(SymbolRef(SymbolData, this));
+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);
}
-template<support::endianness target_endianness, bool is64Bits>
-section_iterator ELFObjectFile<target_endianness, is64Bits>
- ::begin_sections() const {
- DataRefImpl ret;
- ret.p = reinterpret_cast<intptr_t>(base() + Header->e_shoff);
- return section_iterator(SectionRef(ret, this));
+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));
}
-template<support::endianness target_endianness, bool is64Bits>
-section_iterator ELFObjectFile<target_endianness, is64Bits>
- ::end_sections() const {
- DataRefImpl ret;
- ret.p = reinterpret_cast<intptr_t>(base()
- + Header->e_shoff
- + (Header->e_shentsize*getNumSections()));
- return section_iterator(SectionRef(ret, this));
+template <class ELFT>
+typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::begin_symbols() 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);
}
-template<support::endianness target_endianness, bool is64Bits>
-typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
-ELFObjectFile<target_endianness, is64Bits>::begin_dynamic_table() const {
- DataRefImpl DynData;
- if (dot_dynamic_sec == NULL || dot_dynamic_sec->sh_size == 0) {
- DynData.d.a = std::numeric_limits<uint32_t>::max();
- } else {
- DynData.d.a = 0;
- }
- return dyn_iterator(DynRef(DynData, this));
+template <class ELFT>
+typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::end_symbols() const {
+ if (!dot_symtab_sec)
+ return Elf_Sym_Iter(0, 0, false);
+ return Elf_Sym_Iter(dot_symtab_sec->sh_entsize,
+ (const char *)base() + dot_symtab_sec->sh_offset +
+ dot_symtab_sec->sh_size,
+ false);
}
-template<support::endianness target_endianness, bool is64Bits>
-typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
-ELFObjectFile<target_endianness, is64Bits>
- ::end_dynamic_table() const {
- DataRefImpl DynData;
- DynData.d.a = std::numeric_limits<uint32_t>::max();
- return dyn_iterator(DynRef(DynData, this));
+template <class ELFT>
+typename ELFFile<ELFT>::Elf_Dyn_Iter
+ELFFile<ELFT>::begin_dynamic_table() const {
+ if (DynamicRegion.Addr)
+ return Elf_Dyn_Iter(DynamicRegion.EntSize,
+ (const char *)DynamicRegion.Addr);
+ return Elf_Dyn_Iter(0, 0);
}
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getDynNext(DataRefImpl DynData,
- DynRef &Result) const {
- ++DynData.d.a;
+template <class ELFT>
+typename ELFFile<ELFT>::Elf_Dyn_Iter
+ELFFile<ELFT>::end_dynamic_table(bool NULLEnd) const {
+ if (!DynamicRegion.Addr)
+ return Elf_Dyn_Iter(0, 0);
+ Elf_Dyn_Iter Ret(DynamicRegion.EntSize,
+ (const char *)DynamicRegion.Addr + DynamicRegion.Size);
- // Check to see if we are at the end of .dynamic
- if (DynData.d.a >= dot_dynamic_sec->getEntityCount()) {
- // We are at the end. Return the terminator.
- DynData.d.a = std::numeric_limits<uint32_t>::max();
- }
+ if (NULLEnd) {
+ Elf_Dyn_Iter Start = begin_dynamic_table();
+ while (Start != Ret && Start->getTag() != ELF::DT_NULL)
+ ++Start;
- Result = DynRef(DynData, this);
- return object_error::success;
+ // Include the DT_NULL.
+ if (Start != Ret)
+ ++Start;
+ Ret = Start;
+ }
+ return Ret;
}
-template<support::endianness target_endianness, bool is64Bits>
-StringRef
-ELFObjectFile<target_endianness, is64Bits>::getLoadName() const {
+template <class ELFT>
+StringRef ELFFile<ELFT>::getLoadName() const {
if (!dt_soname) {
// Find the DT_SONAME entry
- dyn_iterator it = begin_dynamic_table();
- dyn_iterator ie = end_dynamic_table();
- error_code ec;
- while (it != ie) {
- if (it->getTag() == ELF::DT_SONAME)
- break;
- it.increment(ec);
- if (ec)
- report_fatal_error("dynamic table iteration failed");
- }
+ Elf_Dyn_Iter it = begin_dynamic_table();
+ Elf_Dyn_Iter ie = end_dynamic_table();
+ while (it != ie && it->getTag() != ELF::DT_SONAME)
+ ++it;
+
if (it != ie) {
- if (dot_dynstr_sec == NULL)
- report_fatal_error("Dynamic string table is missing");
- dt_soname = getString(dot_dynstr_sec, it->getVal());
+ dt_soname = getDynamicString(it->getVal());
} else {
dt_soname = "";
}
return dt_soname;
}
-template<support::endianness target_endianness, bool is64Bits>
-library_iterator ELFObjectFile<target_endianness, is64Bits>
- ::begin_libraries_needed() const {
- // Find the first DT_NEEDED entry
- dyn_iterator i = begin_dynamic_table();
- dyn_iterator e = end_dynamic_table();
- error_code ec;
- while (i != e) {
- if (i->getTag() == ELF::DT_NEEDED)
- break;
- i.increment(ec);
- if (ec)
- report_fatal_error("dynamic table iteration failed");
- }
- // Use the same DataRefImpl format as DynRef.
- return library_iterator(LibraryRef(i->getRawDataRefImpl(), this));
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getLibraryNext(DataRefImpl Data,
- LibraryRef &Result) const {
- // Use the same DataRefImpl format as DynRef.
- dyn_iterator i = dyn_iterator(DynRef(Data, this));
- dyn_iterator e = end_dynamic_table();
-
- // Skip the current dynamic table entry.
- error_code ec;
- if (i != e) {
- i.increment(ec);
- // TODO: proper error handling
- if (ec)
- report_fatal_error("dynamic table iteration failed");
- }
-
- // Find the next DT_NEEDED entry.
- while (i != e) {
- if (i->getTag() == ELF::DT_NEEDED)
- break;
- i.increment(ec);
- if (ec)
- report_fatal_error("dynamic table iteration failed");
- }
- Result = LibraryRef(i->getRawDataRefImpl(), this);
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getLibraryPath(DataRefImpl Data, StringRef &Res) const {
- dyn_iterator i = dyn_iterator(DynRef(Data, this));
- if (i == end_dynamic_table())
- report_fatal_error("getLibraryPath() called on iterator end");
-
- if (i->getTag() != ELF::DT_NEEDED)
- report_fatal_error("Invalid library_iterator");
-
- // This uses .dynstr to lookup the name of the DT_NEEDED entry.
- // THis works as long as DT_STRTAB == .dynstr. This is true most of
- // the time, but the specification allows exceptions.
- // TODO: This should really use DT_STRTAB instead. Doing this requires
- // reading the program headers.
- if (dot_dynstr_sec == NULL)
- report_fatal_error("Dynamic string table is missing");
- Res = getString(dot_dynstr_sec, i->getVal());
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-library_iterator ELFObjectFile<target_endianness, is64Bits>
- ::end_libraries_needed() const {
- dyn_iterator e = end_dynamic_table();
- // Use the same DataRefImpl format as DynRef.
- return library_iterator(LibraryRef(e->getRawDataRefImpl(), this));
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-uint8_t ELFObjectFile<target_endianness, is64Bits>::getBytesInAddress() const {
- return is64Bits ? 8 : 4;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-StringRef ELFObjectFile<target_endianness, is64Bits>
- ::getFileFormatName() const {
- switch(Header->e_ident[ELF::EI_CLASS]) {
- case ELF::ELFCLASS32:
- switch(Header->e_machine) {
- case ELF::EM_386:
- return "ELF32-i386";
- case ELF::EM_X86_64:
- return "ELF32-x86-64";
- case ELF::EM_ARM:
- return "ELF32-arm";
- default:
- return "ELF32-unknown";
- }
- case ELF::ELFCLASS64:
- switch(Header->e_machine) {
- case ELF::EM_386:
- return "ELF64-i386";
- case ELF::EM_X86_64:
- return "ELF64-x86-64";
- default:
- return "ELF64-unknown";
- }
- default:
- // FIXME: Proper error handling.
- report_fatal_error("Invalid ELFCLASS!");
- }
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-unsigned ELFObjectFile<target_endianness, is64Bits>::getArch() const {
- switch(Header->e_machine) {
- case ELF::EM_386:
- return Triple::x86;
- case ELF::EM_X86_64:
- return Triple::x86_64;
- case ELF::EM_ARM:
- return Triple::arm;
- default:
- return Triple::UnknownArch;
- }
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-uint64_t ELFObjectFile<target_endianness, is64Bits>::getNumSections() const {
- assert(Header && "Header not initialized!");
- if (Header->e_shnum == ELF::SHN_UNDEF) {
- assert(SectionHeaderTable && "SectionHeaderTable not initialized!");
- return SectionHeaderTable->sh_size;
- }
- return Header->e_shnum;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-uint64_t
-ELFObjectFile<target_endianness, is64Bits>::getStringTableIndex() const {
- if (Header->e_shnum == ELF::SHN_UNDEF) {
- if (Header->e_shstrndx == ELF::SHN_HIRESERVE)
- return SectionHeaderTable->sh_link;
- if (Header->e_shstrndx >= getNumSections())
- return 0;
- }
- return Header->e_shstrndx;
-}
-
-
-template<support::endianness target_endianness, bool is64Bits>
-template<typename T>
-inline const T *
-ELFObjectFile<target_endianness, is64Bits>::getEntry(uint16_t Section,
- uint32_t Entry) 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);
}
-template<support::endianness target_endianness, bool is64Bits>
-template<typename T>
-inline const T *
-ELFObjectFile<target_endianness, is64Bits>::getEntry(const Elf_Shdr * Section,
- uint32_t Entry) const {
- return reinterpret_cast<const T *>(
- base()
- + Section->sh_offset
- + (Entry * Section->sh_entsize));
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
-ELFObjectFile<target_endianness, is64Bits>::getSymbol(DataRefImpl Symb) const {
- return getEntry<Elf_Sym>(SymbolTableSections[Symb.d.b], Symb.d.a);
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Dyn *
-ELFObjectFile<target_endianness, is64Bits>::getDyn(DataRefImpl DynData) const {
- return getEntry<Elf_Dyn>(dot_dynamic_sec, DynData.d.a);
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rel *
-ELFObjectFile<target_endianness, is64Bits>::getRel(DataRefImpl Rel) const {
- return getEntry<Elf_Rel>(Rel.w.b, Rel.w.c);
+template <class ELFT>
+template <typename T>
+const T *ELFFile<ELFT>::getEntry(const Elf_Shdr *Section,
+ uint32_t Entry) const {
+ return reinterpret_cast<const T *>(base() + Section->sh_offset +
+ (Entry * Section->sh_entsize));
}
-template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rela *
-ELFObjectFile<target_endianness, is64Bits>::getRela(DataRefImpl Rela) const {
- return getEntry<Elf_Rela>(Rela.w.b, Rela.w.c);
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
-ELFObjectFile<target_endianness, is64Bits>::getSection(DataRefImpl Symb) const {
- const Elf_Shdr *sec = getSection(Symb.d.b);
- if (sec->sh_type != ELF::SHT_SYMTAB || sec->sh_type != ELF::SHT_DYNSYM)
- // FIXME: Proper error handling.
- report_fatal_error("Invalid symbol table section!");
- return sec;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
-ELFObjectFile<target_endianness, is64Bits>::getSection(uint32_t index) const {
+template <class ELFT>
+const typename ELFFile<ELFT>::Elf_Shdr *
+ELFFile<ELFT>::getSection(uint32_t index) const {
if (index == 0)
- return 0;
+ return nullptr;
if (!SectionHeaderTable || index >= getNumSections())
// FIXME: Proper error handling.
report_fatal_error("Invalid section index!");
+ (index * Header->e_shentsize));
}
-template<support::endianness target_endianness, bool is64Bits>
-const char *ELFObjectFile<target_endianness, is64Bits>
- ::getString(uint32_t section,
+template <class ELFT>
+const char *ELFFile<ELFT>::getString(uint32_t section,
ELF::Elf32_Word offset) const {
return getString(getSection(section), offset);
}
-template<support::endianness target_endianness, bool is64Bits>
-const char *ELFObjectFile<target_endianness, is64Bits>
- ::getString(const Elf_Shdr *section,
+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)
return (const char *)base() + section->sh_offset + offset;
}
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolName(const Elf_Shdr *section,
- const Elf_Sym *symb,
- StringRef &Result) const {
- if (symb->st_name == 0) {
- const Elf_Shdr *section = getSection(symb);
- if (!section)
- Result = "";
- else
- Result = getString(dot_shstrtab_sec, section->sh_name);
- return object_error::success;
- }
+template <class ELFT>
+const char *ELFFile<ELFT>::getDynamicString(uintX_t Offset) const {
+ if (!DynStrRegion.Addr || Offset >= DynStrRegion.Size)
+ return nullptr;
+ return (const char *)DynStrRegion.Addr + Offset;
+}
- if (section == SymbolTableSections[0]) {
- // Symbol is in .dynsym, use .dynstr string table
- Result = getString(dot_dynstr_sec, symb->st_name);
- } else {
- // Use the default symbol table name section.
- Result = getString(dot_strtab_sec, symb->st_name);
+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));
+}
+
+template <class ELFT>
+ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Shdr *Section,
+ const Elf_Sym *Symb) const {
+ if (Symb->st_name == 0) {
+ const Elf_Shdr *ContainingSec = getSection(Symb);
+ if (ContainingSec)
+ return getSectionName(ContainingSec);
}
- return object_error::success;
+
+ 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>::getSectionName(const Elf_Shdr *Section) const {
+ if (Section->sh_name >= dot_shstrtab_sec->sh_size)
+ return object_error::parse_failed;
+ return StringRef(getString(dot_shstrtab_sec, Section->sh_name));
}
-template<support::endianness target_endianness, bool is64Bits>
-error_code ELFObjectFile<target_endianness, is64Bits>
- ::getSymbolVersion(const Elf_Shdr *section,
- const Elf_Sym *symb,
- StringRef &Version,
- bool &IsDefault) const {
+template <class ELFT>
+ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Shdr *section,
+ const Elf_Sym *symb,
+ bool &IsDefault) const {
// Handle non-dynamic symbols.
- if (section != SymbolTableSections[0]) {
+ if (section != DynSymRegion.Addr && 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.
- StringRef Name;
- error_code ec = getSymbolName(section, symb, Name);
- if (ec != object_error::success)
- return ec;
+ ErrorOr<StringRef> SymName = getSymbolName(section, symb);
+ if (!SymName)
+ return SymName;
+ StringRef Name = *SymName;
size_t atpos = Name.find('@');
if (atpos == StringRef::npos) {
- Version = "";
IsDefault = false;
- return object_error::success;
+ return StringRef("");
}
++atpos;
if (atpos < Name.size() && Name[atpos] == '@') {
} else {
IsDefault = false;
}
- Version = Name.substr(atpos);
- return object_error::success;
+ return Name.substr(atpos);
}
// This is a dynamic symbol. Look in the GNU symbol version table.
- if (dot_gnu_version_sec == NULL) {
+ if (!dot_gnu_version_sec) {
// No version table.
- Version = "";
IsDefault = false;
- return object_error::success;
+ return StringRef("");
}
// Determine the position in the symbol table of this entry.
- const char *sec_start = (const char*)base() + section->sh_offset;
- size_t entry_index = ((const char*)symb - sec_start)/section->sh_entsize;
+ size_t entry_index = ((const char *)symb - (const char *)DynSymRegion.Addr) /
+ DynSymRegion.EntSize;
// Get the corresponding version index entry
const Elf_Versym *vs = getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index);
// Special markers for unversioned symbols.
if (version_index == ELF::VER_NDX_LOCAL ||
version_index == ELF::VER_NDX_GLOBAL) {
- Version = "";
IsDefault = false;
- return object_error::success;
+ return StringRef("");
}
// Lookup this symbol in the version table
LoadVersionMap();
if (version_index >= VersionMap.size() || VersionMap[version_index].isNull())
- report_fatal_error("Symbol has version index without corresponding "
- "define or reference entry");
+ return object_error::parse_failed;
const VersionMapEntry &entry = VersionMap[version_index];
// Get the version name string
} else {
name_offset = entry.getVernaux()->vna_name;
}
- Version = getString(dot_dynstr_sec, name_offset);
// Set IsDefault
if (entry.isVerdef()) {
IsDefault = false;
}
- return object_error::success;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-inline DynRefImpl<target_endianness, is64Bits>
- ::DynRefImpl(DataRefImpl DynP, const OwningType *Owner)
- : DynPimpl(DynP)
- , OwningObject(Owner) {}
-
-template<support::endianness target_endianness, bool is64Bits>
-inline bool DynRefImpl<target_endianness, is64Bits>
- ::operator==(const DynRefImpl &Other) const {
- return DynPimpl == Other.DynPimpl;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-inline bool DynRefImpl<target_endianness, is64Bits>
- ::operator <(const DynRefImpl &Other) const {
- return DynPimpl < Other.DynPimpl;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-inline error_code DynRefImpl<target_endianness, is64Bits>
- ::getNext(DynRefImpl &Result) const {
- return OwningObject->getDynNext(DynPimpl, Result);
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-inline int64_t DynRefImpl<target_endianness, is64Bits>
- ::getTag() const {
- return OwningObject->getDyn(DynPimpl)->d_tag;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-inline uint64_t DynRefImpl<target_endianness, is64Bits>
- ::getVal() const {
- return OwningObject->getDyn(DynPimpl)->d_un.d_val;
+ if (name_offset >= DynStrRegion.Size)
+ return object_error::parse_failed;
+ return StringRef(getDynamicString(name_offset));
}
-template<support::endianness target_endianness, bool is64Bits>
-inline uint64_t DynRefImpl<target_endianness, is64Bits>
- ::getPtr() const {
- return OwningObject->getDyn(DynPimpl)->d_un.d_ptr;
-}
-
-template<support::endianness target_endianness, bool is64Bits>
-inline DataRefImpl DynRefImpl<target_endianness, is64Bits>
- ::getRawDataRefImpl() const {
- return DynPimpl;
-}
-
-/// This is a generic interface for retrieving GNU symbol version
-/// information from an ELFObjectFile.
-static inline error_code GetELFSymbolVersion(const ObjectFile *Obj,
- const SymbolRef &Sym,
- StringRef &Version,
- bool &IsDefault) {
- // Little-endian 32-bit
- if (const ELFObjectFile<support::little, false> *ELFObj =
- dyn_cast<ELFObjectFile<support::little, false> >(Obj))
- return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
-
- // Big-endian 32-bit
- if (const ELFObjectFile<support::big, false> *ELFObj =
- dyn_cast<ELFObjectFile<support::big, false> >(Obj))
- return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
-
- // Little-endian 64-bit
- if (const ELFObjectFile<support::little, true> *ELFObj =
- dyn_cast<ELFObjectFile<support::little, true> >(Obj))
- return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
-
- // Big-endian 64-bit
- if (const ELFObjectFile<support::big, true> *ELFObj =
- dyn_cast<ELFObjectFile<support::big, true> >(Obj))
- return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
-
- llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");
-}
-
-}
+/// This function returns the hash value for a symbol in the .dynsym section
+/// Name of the API remains consistent as specified in the libelf
+/// REF : http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#hash
+static inline unsigned elf_hash(StringRef &symbolName) {
+ unsigned h = 0, g;
+ for (unsigned i = 0, j = symbolName.size(); i < j; i++) {
+ h = (h << 4) + symbolName[i];
+ g = h & 0xf0000000L;
+ if (g != 0)
+ h ^= g >> 24;
+ h &= ~g;
+ }
+ return h;
}
+} // end namespace object
+} // end namespace llvm
#endif
projects / oota-llvm.git / blobdiff