typedef iterator_range<const Elf_Sym *> Elf_Sym_Range;
+ const uint8_t *base() const {
+ return reinterpret_cast<const uint8_t *>(Buf.data());
+ }
+
private:
typedef SmallVector<const Elf_Shdr *, 2> Sections_t;
typedef DenseMap<unsigned, unsigned> IndexMap_t;
StringRef Buf;
- const uint8_t *base() const {
- return reinterpret_cast<const uint8_t *>(Buf.data());
- }
-
const Elf_Ehdr *Header;
const Elf_Shdr *SectionHeaderTable = nullptr;
StringRef DotShstrtab; // Section header string table.
StringRef DotStrtab; // Symbol header string table.
const Elf_Shdr *dot_symtab_sec = nullptr; // Symbol table section.
const Elf_Shdr *DotDynSymSec = nullptr; // Dynamic symbol table section.
- const Elf_Hash *HashTable = nullptr;
const Elf_Shdr *SymbolTableSectionHeaderIndex = nullptr;
DenseMap<const Elf_Sym *, ELF::Elf64_Word> ExtendedSymbolTable;
const Elf_Shdr *dot_gnu_version_r_sec = nullptr; // .gnu.version_r
const Elf_Shdr *dot_gnu_version_d_sec = nullptr; // .gnu.version_d
- /// \brief Represents a region described by entries in the .dynamic table.
- struct DynRegionInfo {
- 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 DynStrRegion;
- DynRegionInfo DynRelaRegion;
-
- // SONAME entry in dynamic string table
- StringRef DTSoname;
-
// Records for each version index the corresponding Verdef or Vernaux entry.
// This is filled the first time LoadVersionMap() is called.
class VersionMapEntry : public PointerIntPair<const void*, 1> {
void LoadVersionNeeds(const Elf_Shdr *ec) const;
void LoadVersionMap() const;
- void scanDynamicTable();
-
public:
template<typename T>
const T *getEntry(uint32_t Section, uint32_t Entry) const;
const Elf_Shdr *getDotSymtabSec() const { return dot_symtab_sec; }
const Elf_Shdr *getDotDynSymSec() const { return DotDynSymSec; }
- const Elf_Hash *getHashTable() const { return HashTable; }
- StringRef getDynamicStringTable() const {
- return StringRef((const char *)DynStrRegion.Addr, DynStrRegion.Size);
- }
ErrorOr<StringRef> getStringTable(const Elf_Shdr *Section) const;
ErrorOr<StringRef> getStringTableForSymtab(const Elf_Shdr &Section) const;
- const char *getDynamicString(uintX_t Offset) const;
- ErrorOr<StringRef> getSymbolVersion(const Elf_Sym *Symb,
+ ErrorOr<StringRef> getSymbolVersion(StringRef StrTab, const Elf_Sym *Symb,
bool &IsDefault) const;
void VerifyStrTab(const Elf_Shdr *sh) const;
return make_range(symbol_begin(), symbol_end());
}
- const Elf_Dyn *dynamic_table_begin() const;
- const Elf_Dyn *dynamic_table_end() const;
- Elf_Dyn_Range dynamic_table() const {
- return make_range(dynamic_table_begin(), dynamic_table_end());
- }
-
const Elf_Sym *dynamic_symbol_begin() const {
if (!DotDynSymSec)
return nullptr;
return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
}
- const Elf_Rela *dyn_rela_begin() const {
- if (DynRelaRegion.Size && DynRelaRegion.EntSize != sizeof(Elf_Rela))
- report_fatal_error("Invalid relocation entry size");
- return reinterpret_cast<const Elf_Rela *>(DynRelaRegion.Addr);
- }
-
- const Elf_Rela *dyn_rela_end() const {
- uint64_t Size = DynRelaRegion.Size;
- if (Size % sizeof(Elf_Rela))
- report_fatal_error("Invalid relocation table size");
- return dyn_rela_begin() + Size / sizeof(Elf_Rela);
- }
-
typedef iterator_range<const Elf_Rela *> Elf_Rela_Range;
- Elf_Rela_Range dyn_relas() const {
- return make_range(dyn_rela_begin(), dyn_rela_end());
- }
-
const Elf_Rela *rela_begin(const Elf_Shdr *sec) const {
if (sec->sh_entsize != sizeof(Elf_Rela))
report_fatal_error("Invalid relocation entry size");
ErrorOr<StringRef> getSectionName(const Elf_Shdr *Section) const;
ErrorOr<ArrayRef<uint8_t> > getSectionContents(const Elf_Shdr *Sec) const;
- StringRef getLoadName() const;
};
typedef ELFFile<ELFType<support::little, false>> ELF32LEFile;
Header = reinterpret_cast<const Elf_Ehdr *>(base());
- if (Header->e_shoff == 0) {
- scanDynamicTable();
+ if (Header->e_shoff == 0)
return;
- }
const uint64_t SectionTableOffset = Header->e_shoff;
for (const Elf_Shdr &Sec : sections()) {
switch (Sec.sh_type) {
- case ELF::SHT_HASH:
- if (HashTable) {
- EC = object_error::parse_failed;
- return;
- }
- HashTable = reinterpret_cast<const Elf_Hash *>(base() + Sec.sh_offset);
- break;
case ELF::SHT_SYMTAB_SHNDX:
if (SymbolTableSectionHeaderIndex) {
// More than one .symtab_shndx!
}
}
- scanDynamicTable();
-
EC = std::error_code();
}
return VAddr < Phdr->p_vaddr;
}
-template <class ELFT> void ELFFile<ELFT>::scanDynamicTable() {
- SmallVector<const Elf_Phdr *, 4> LoadSegments;
- for (const Elf_Phdr &Phdr : program_headers()) {
- if (Phdr.p_type == ELF::PT_DYNAMIC) {
- DynamicRegion.Addr = base() + Phdr.p_offset;
- DynamicRegion.Size = Phdr.p_filesz;
- continue;
- }
- if (Phdr.p_type != ELF::PT_LOAD || Phdr.p_filesz == 0)
- continue;
- LoadSegments.push_back(&Phdr);
- }
-
- auto toMappedAddr = [&](uint64_t VAddr) -> const uint8_t * {
- const Elf_Phdr **I = std::upper_bound(
- LoadSegments.begin(), LoadSegments.end(), VAddr, compareAddr<ELFT>);
- if (I == LoadSegments.begin())
- report_fatal_error("Virtual address is not in any segment");
- --I;
- const Elf_Phdr &Phdr = **I;
- uint64_t Delta = VAddr - Phdr.p_vaddr;
- if (Delta >= Phdr.p_filesz)
- report_fatal_error("Virtual address is not in any segment");
- return this->base() + Phdr.p_offset + Delta;
- };
-
- uint64_t SONameOffset = 0;
- for (const Elf_Dyn &Dyn : dynamic_table()) {
- switch (Dyn.d_tag) {
- case ELF::DT_HASH:
- if (HashTable)
- continue;
- HashTable =
- reinterpret_cast<const Elf_Hash *>(toMappedAddr(Dyn.getPtr()));
- break;
- case ELF::DT_STRTAB:
- if (!DynStrRegion.Addr)
- DynStrRegion.Addr = toMappedAddr(Dyn.getPtr());
- break;
- case ELF::DT_STRSZ:
- if (!DynStrRegion.Size)
- DynStrRegion.Size = Dyn.getVal();
- break;
- case ELF::DT_RELA:
- if (!DynRelaRegion.Addr)
- DynRelaRegion.Addr = toMappedAddr(Dyn.getPtr());
- break;
- case ELF::DT_RELASZ:
- DynRelaRegion.Size = Dyn.getVal();
- break;
- case ELF::DT_RELAENT:
- DynRelaRegion.EntSize = Dyn.getVal();
- break;
- case ELF::DT_SONAME:
- SONameOffset = Dyn.getVal();
- break;
- }
- }
- if (SONameOffset)
- DTSoname = getDynamicString(SONameOffset);
-}
-
template <class ELFT>
const typename ELFFile<ELFT>::Elf_Shdr *ELFFile<ELFT>::section_begin() const {
if (Header->e_shentsize != sizeof(Elf_Shdr))
dot_symtab_sec->sh_size);
}
-template <class ELFT>
-const typename ELFFile<ELFT>::Elf_Dyn *
-ELFFile<ELFT>::dynamic_table_begin() const {
- return reinterpret_cast<const Elf_Dyn *>(DynamicRegion.Addr);
-}
-
-template <class ELFT>
-const typename ELFFile<ELFT>::Elf_Dyn *
-ELFFile<ELFT>::dynamic_table_end() const {
- uint64_t Size = DynamicRegion.Size;
- if (Size % sizeof(Elf_Dyn))
- report_fatal_error("Invalid dynamic table size");
-
- return dynamic_table_begin() + Size / sizeof(Elf_Dyn);
-}
-
-template <class ELFT>
-StringRef ELFFile<ELFT>::getLoadName() const {
- return DTSoname;
-}
-
template <class ELFT>
template <typename T>
const T *ELFFile<ELFT>::getEntry(uint32_t Section, uint32_t Entry) const {
return getStringTable(*SectionOrErr);
}
-template <class ELFT>
-const char *ELFFile<ELFT>::getDynamicString(uintX_t Offset) const {
- if (Offset >= DynStrRegion.Size)
- return nullptr;
- return (const char *)DynStrRegion.Addr + Offset;
-}
-
template <class ELFT>
ErrorOr<StringRef>
ELFFile<ELFT>::getSectionName(const Elf_Shdr *Section) const {
}
template <class ELFT>
-ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Sym *symb,
+ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(StringRef StrTab,
+ const Elf_Sym *symb,
bool &IsDefault) const {
// This is a dynamic symbol. Look in the GNU symbol version table.
if (!dot_gnu_version_sec) {
IsDefault = false;
}
- if (name_offset >= DynStrRegion.Size)
+ if (name_offset >= StrTab.size())
return object_error::parse_failed;
- return StringRef(getDynamicString(name_offset));
+ return StringRef(StrTab.data() + name_offset);
}
/// This function returns the hash value for a symbol in the .dynsym section
projects / oota-llvm.git / blobdiff