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Remove Elf_Sym_Iter. 

It was a fairly broken concept for an ELF only class.

An ELF file can have two symbol tables, but they have exactly the same
format. There is no concept of a dynamic or a static symbol. Storing this
on the iterator also makes us do more work per symbol than necessary. To fetch
a name we would:

* Find if we had a static or a dynamic symbol.
* Look at the corresponding symbol table and find the string table section.
* Look at the string table section to fetch its contents.
* Compute the name as a substring of the string table.

All but the last step can be done per symbol table instead of per symbol. This
is a step in that direction.

llvm-svn: 240939
This commit is contained in:
Rafael Espindola 2015-06-29 12:38:31 +00:00
parent 4a38b0b493
commit 719dc7c436
6 changed files with 124 additions and 189 deletions
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152
llvm/include/llvm/Object/ELF.h
View File

@ -158,76 +158,7 @@ public:
enum { NumLowBitsAvailable = 1 };
};
class Elf_Sym_Iter {
public:
typedef ptrdiff_t difference_type;
typedef const Elf_Sym value_type;
typedef std::random_access_iterator_tag iterator_category;
typedef value_type &reference;
typedef value_type *pointer;
/// \brief Default construct iterator.
Elf_Sym_Iter() : EntitySize(0), Current(0, false) {}
Elf_Sym_Iter(uintX_t EntSize, const char *Start, bool IsDynamic)
: EntitySize(EntSize), Current(Start, IsDynamic) {}
reference operator*() {
assert(Current.getPointer() &&
"Attempted to dereference an invalid iterator!");
return *reinterpret_cast<pointer>(Current.getPointer());
}
pointer operator->() {
assert(Current.getPointer() &&
"Attempted to dereference an invalid iterator!");
return reinterpret_cast<pointer>(Current.getPointer());
}
bool operator==(const Elf_Sym_Iter &Other) {
return Current == Other.Current;
}
bool operator!=(const Elf_Sym_Iter &Other) { return !(*this == Other); }
Elf_Sym_Iter &operator++() {
assert(Current.getPointer() &&
"Attempted to increment an invalid iterator!");
Current.setPointer(Current.getPointer() + EntitySize);
return *this;
}
Elf_Sym_Iter operator++(int) {
Elf_Sym_Iter Tmp = *this;
++*this;
return Tmp;
}
Elf_Sym_Iter operator+(difference_type Dist) {
assert(Current.getPointer() &&
"Attempted to increment an invalid iterator!");
Current.setPointer(Current.getPointer() + EntitySize * Dist);
return *this;
}
difference_type operator-(const Elf_Sym_Iter &Other) const {
assert(EntitySize == Other.EntitySize &&
"Subtracting iterators of different EntitySize!");
return (Current.getPointer() - Other.Current.getPointer()) / EntitySize;
}
const char *get() const { return Current.getPointer(); }
bool isDynamic() const { return Current.getInt(); }
uintX_t getEntSize() const { return EntitySize; }
private:
uintX_t EntitySize;
PointerIntPair<const char *, 1, bool,
ArchivePointerTypeTraits<const char> > Current;
};
typedef iterator_range<Elf_Sym_Iter> Elf_Sym_Range;
typedef iterator_range<const Elf_Sym *> Elf_Sym_Range;
private:
typedef SmallVector<const Elf_Shdr *, 2> Sections_t;
@ -339,8 +270,8 @@ public:
return make_range(begin_sections(), end_sections());
}
Elf_Sym_Iter begin_symbols() const;
Elf_Sym_Iter end_symbols() const;
const Elf_Sym *begin_symbols() const;
const Elf_Sym *end_symbols() const;
Elf_Sym_Range symbols() const {
return make_range(begin_symbols(), end_symbols());
}
@ -353,19 +284,22 @@ public:
return make_range(begin_dynamic_table(), end_dynamic_table(NULLEnd));
}
Elf_Sym_Iter begin_dynamic_symbols() const {
const Elf_Sym *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);
return reinterpret_cast<const Elf_Sym *>(DynSymRegion.Addr);
return nullptr;
}
Elf_Sym_Iter end_dynamic_symbols() const {
const Elf_Sym *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);
return reinterpret_cast<const Elf_Sym *>(
((const char *)DynSymRegion.Addr + DynSymRegion.Size));
return nullptr;
}
Elf_Sym_Range dynamic_symbols() const {
return make_range(begin_dynamic_symbols(), end_dynamic_symbols());
}
Elf_Rela_Iter begin_dyn_rela() const {
@ -427,8 +361,9 @@ public:
const Elf_Shdr *getSection(uint32_t Index) const;
const Elf_Sym *getSymbol(uint32_t index) const;
ErrorOr<StringRef> getSymbolName(Elf_Sym_Iter Sym) const;
ErrorOr<StringRef> getStaticSymbolName(const Elf_Sym *Symb) const;
ErrorOr<StringRef> getDynamicSymbolName(const Elf_Sym *Symb) const;
ErrorOr<StringRef> getSymbolName(const Elf_Sym *Symb, bool IsDynamic) const;
/// \brief Get the name of \p Symb.
/// \param SymTab The symbol table section \p Symb is contained in.
@ -436,7 +371,7 @@ public:
///
/// \p SymTab is used to lookup the string table to use to get the symbol's
/// name.
ErrorOr<StringRef> getSymbolName(const Elf_Shdr *SymTab,
ErrorOr<StringRef> getSymbolName(const Elf_Shdr *StrTab,
const Elf_Sym *Symb) const;
ErrorOr<StringRef> getSectionName(const Elf_Shdr *Section) const;
uint64_t getSymbolIndex(const Elf_Sym *sym) const;
@ -763,10 +698,9 @@ ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC)
if (SymbolTableSectionHeaderIndex) {
const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() +
SymbolTableSectionHeaderIndex->sh_offset);
for (Elf_Sym_Iter SI = begin_symbols(), SE = end_symbols(); SI != SE;
++SI) {
for (const Elf_Sym &S : symbols()) {
if (*ShndxTable != ELF::SHN_UNDEF)
ExtendedSymbolTable[&*SI] = *ShndxTable;
ExtendedSymbolTable[&S] = *ShndxTable;
++ShndxTable;
}
}
@ -844,21 +778,18 @@ typename ELFFile<ELFT>::Elf_Shdr_Iter ELFFile<ELFT>::end_sections() const {
}
template <class ELFT>
typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::begin_symbols() const {
const typename ELFFile<ELFT>::Elf_Sym *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);
return nullptr;
return reinterpret_cast<const Elf_Sym *>(base() + dot_symtab_sec->sh_offset);
}
template <class ELFT>
typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::end_symbols() const {
const typename ELFFile<ELFT>::Elf_Sym *ELFFile<ELFT>::end_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 +
dot_symtab_sec->sh_size,
false);
return nullptr;
return reinterpret_cast<const Elf_Sym *>(base() + dot_symtab_sec->sh_offset +
dot_symtab_sec->sh_size);
}
template <class ELFT>
@ -950,26 +881,29 @@ const char *ELFFile<ELFT>::getDynamicString(uintX_t Offset) const {
}
template <class ELFT>
ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(Elf_Sym_Iter Sym) const {
if (!Sym.isDynamic())
return getSymbolName(dot_symtab_sec, &*Sym);
if (!DynStrRegion.Addr || Sym->st_name >= DynStrRegion.Size)
return object_error::parse_failed;
return StringRef(getDynamicString(Sym->st_name));
ErrorOr<StringRef>
ELFFile<ELFT>::getStaticSymbolName(const Elf_Sym *Symb) const {
return getSymbolName(dot_strtab_sec, Symb);
}
template <class ELFT>
ErrorOr<StringRef>
ELFFile<ELFT>::getStaticSymbolName(const Elf_Sym *Symb) const {
return getSymbolName(dot_symtab_sec, Symb);
ELFFile<ELFT>::getDynamicSymbolName(const Elf_Sym *Symb) const {
return StringRef(getDynamicString(Symb->st_name));
}
template <class ELFT>
ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Shdr *Section,
const Elf_Sym *Symb) const {
const Elf_Shdr *StrTab = getSection(Section->sh_link);
return getString(StrTab, Symb->st_name);
ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Sym *Symb,
bool IsDynamic) const {
if (IsDynamic)
return getDynamicSymbolName(Symb);
return getStaticSymbolName(Symb);
}
template <class ELFT>
ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Shdr *StrTab,
const Elf_Sym *Sym) const {
return getString(StrTab, Sym->st_name);
}
template <class ELFT>

57
llvm/include/llvm/Object/ELFObjectFile.h
View File

@ -159,7 +159,6 @@ public:
typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela;
typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn;
typedef typename ELFFile<ELFT>::Elf_Sym_Iter Elf_Sym_Iter;
typedef typename ELFFile<ELFT>::Elf_Shdr_Iter Elf_Shdr_Iter;
typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
@ -224,20 +223,14 @@ protected:
const Elf_Rel *getRel(DataRefImpl Rel) const;
const Elf_Rela *getRela(DataRefImpl Rela) const;
Elf_Sym_Iter toELFSymIter(DataRefImpl Symb) const {
bool IsDynamic = Symb.p & 1;
if (IsDynamic)
return Elf_Sym_Iter(
EF.begin_dynamic_symbols().getEntSize(),
reinterpret_cast<const char *>(Symb.p & ~uintptr_t(1)), IsDynamic);
return Elf_Sym_Iter(EF.begin_symbols().getEntSize(),
reinterpret_cast<const char *>(Symb.p), IsDynamic);
const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
return reinterpret_cast<const Elf_Sym *>(Sym.p & ~uintptr_t(1));
}
DataRefImpl toDRI(Elf_Sym_Iter Symb) const {
DataRefImpl toDRI(const Elf_Sym *Sym, bool IsDynamic) const {
DataRefImpl DRI;
DRI.p = reinterpret_cast<uintptr_t>(Symb.get()) |
static_cast<uintptr_t>(Symb.isDynamic());
DRI.p =
reinterpret_cast<uintptr_t>(Sym) | static_cast<uintptr_t>(IsDynamic);
return DRI;
}
@ -334,14 +327,16 @@ typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
template <class ELFT>
void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Symb) const {
Symb = toDRI(++toELFSymIter(Symb));
void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
const Elf_Sym *S = toELFSymIter(Sym);
Sym = toDRI(++S, Sym.p & 1);
}
template <class ELFT>
std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb,
std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym,
StringRef &Result) const {
ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb));
const Elf_Sym *ESym = toELFSymIter(Sym);
ErrorOr<StringRef> Name = EF.getSymbolName(ESym, Sym.p & 1);
if (!Name)
return Name.getError();
Result = *Name;
@ -405,7 +400,7 @@ std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
template <class ELFT>
uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
Elf_Sym_Iter Sym = toELFSymIter(Symb);
const Elf_Sym *Sym = toELFSymIter(Symb);
if (Sym->st_shndx == ELF::SHN_COMMON)
return Sym->st_value;
return 0;
@ -454,9 +449,8 @@ SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
}
template <class ELFT>
uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
Elf_Sym_Iter EIter = toELFSymIter(Symb);
const Elf_Sym *ESym = &*EIter;
uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
const Elf_Sym *ESym = toELFSymIter(Sym);
uint32_t Result = SymbolRef::SF_None;
@ -470,11 +464,12 @@ uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
Result |= SymbolRef::SF_Absolute;
if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
EIter == EF.begin_symbols() || EIter == EF.begin_dynamic_symbols())
ESym == EF.begin_symbols() || ESym == EF.begin_dynamic_symbols())
Result |= SymbolRef::SF_FormatSpecific;
if (EF.getHeader()->e_machine == ELF::EM_ARM) {
if (ErrorOr<StringRef> NameOrErr = EF.getSymbolName(EIter)) {
ErrorOr<StringRef> NameOrErr = EF.getSymbolName(ESym, Sym.p & 1);
if (NameOrErr) {
StringRef Name = *NameOrErr;
if (Name.startswith("$d") || Name.startswith("$t") ||
Name.startswith("$a"))
@ -584,7 +579,7 @@ bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
template <class ELFT>
bool ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
DataRefImpl Symb) const {
Elf_Sym_Iter ESym = toELFSymIter(Symb);
const Elf_Sym *ESym = toELFSymIter(Symb);
uintX_t Index = ESym->st_shndx;
bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
@ -665,10 +660,10 @@ ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
default:
report_fatal_error("Invalid symbol table section type!");
case ELF::SHT_SYMTAB:
SymbolData = toDRI(EF.begin_symbols() + symbolIdx);
SymbolData = toDRI(EF.begin_symbols() + symbolIdx, false);
break;
case ELF::SHT_DYNSYM:
SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx);
SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx, true);
break;
}
@ -804,22 +799,26 @@ ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
template <class ELFT>
basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
return basic_symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this));
DataRefImpl Sym = toDRI(EF.begin_symbols(), false);
return basic_symbol_iterator(SymbolRef(Sym, this));
}
template <class ELFT>
basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
return basic_symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this));
DataRefImpl Sym = toDRI(EF.end_symbols(), false);
return basic_symbol_iterator(SymbolRef(Sym, this));
}
template <class ELFT>
elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this));
DataRefImpl Sym = toDRI(EF.begin_dynamic_symbols(), true);
return symbol_iterator(SymbolRef(Sym, this));
}
template <class ELFT>
elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this));
DataRefImpl Sym = toDRI(EF.end_dynamic_symbols(), true);
return symbol_iterator(SymbolRef(Sym, this));
}
template <class ELFT>

7
llvm/tools/llvm-objdump/llvm-objdump.cpp
View File

@ -321,6 +321,10 @@ static std::error_code getRelocationValueString(const ELFObjectFile<ELFT> *Obj,
const ELFFile<ELFT> &EF = *Obj->getELFFile();
const Elf_Shdr *sec = EF.getSection(Rel.d.a);
const Elf_Shdr *SymTab = EF.getSection(sec->sh_link);
assert(SymTab->sh_type == ELF::SHT_SYMTAB ||
SymTab->sh_type == ELF::SHT_DYNSYM);
const Elf_Shdr *StrTab = EF.getSection(SymTab->sh_link);
uint8_t type;
StringRef res;
int64_t addend = 0;
@ -351,8 +355,7 @@ static std::error_code getRelocationValueString(const ELFObjectFile<ELFT> *Obj,
return EC;
Target = *SecName;
} else {
ErrorOr<StringRef> SymName =
EF.getSymbolName(EF.getSection(sec->sh_link), symb);
ErrorOr<StringRef> SymName = EF.getSymbolName(StrTab, symb);
if (!SymName)
return SymName.getError();
Target = *SymName;

15
llvm/tools/llvm-readobj/ARMEHABIPrinter.h
View File

@ -312,7 +312,6 @@ class PrinterContext {
typedef typename object::ELFFile<ET>::Elf_Shdr Elf_Shdr;
typedef typename object::ELFFile<ET>::Elf_Rel_Iter Elf_Rel_iterator;
typedef typename object::ELFFile<ET>::Elf_Sym_Iter Elf_Sym_iterator;
typedef typename object::ELFFile<ET>::Elf_Shdr_Iter Elf_Shdr_iterator;
static const size_t IndexTableEntrySize;
@ -344,13 +343,13 @@ template <typename ET>
const size_t PrinterContext<ET>::IndexTableEntrySize = 8;
template <typename ET>
ErrorOr<StringRef> PrinterContext<ET>::FunctionAtAddress(unsigned Section,
uint64_t Address) const {
for (Elf_Sym_iterator SI = ELF->begin_symbols(), SE = ELF->end_symbols();
SI != SE; ++SI)
if (SI->st_shndx == Section && SI->st_value == Address &&
SI->getType() == ELF::STT_FUNC)
return ELF->getSymbolName(SI);
ErrorOr<StringRef>
PrinterContext<ET>::FunctionAtAddress(unsigned Section,
uint64_t Address) const {
for (const Elf_Sym &Sym : ELF->symbols())
if (Sym.st_shndx == Section && Sym.st_value == Address &&
Sym.getType() == ELF::STT_FUNC)
return ELF->getSymbolName(&Sym, false);
return readobj_error::unknown_symbol;
}

63
llvm/tools/llvm-readobj/ELFDumper.cpp
View File

@ -69,7 +69,7 @@ private:
typedef typename ELFO::Elf_Shdr Elf_Shdr;
typedef typename ELFO::Elf_Sym Elf_Sym;
void printSymbol(typename ELFO::Elf_Sym_Iter Symbol);
void printSymbol(const Elf_Sym *Symbol, bool IsDynamic);
void printRelocations(const Elf_Shdr *Sec);
void printRelocation(const Elf_Shdr *Sec, typename ELFO::Elf_Rela Rel);
@ -123,9 +123,10 @@ std::error_code createELFDumper(const object::ObjectFile *Obj,
template <typename ELFO>
static std::string getFullSymbolName(const ELFO &Obj,
typename ELFO::Elf_Sym_Iter Symbol) {
StringRef SymbolName = errorOrDefault(Obj.getSymbolName(Symbol));
if (!Symbol.isDynamic())
const typename ELFO::Elf_Sym *Symbol,
bool IsDynamic) {
StringRef SymbolName = errorOrDefault(Obj.getSymbolName(Symbol, IsDynamic));
if (!IsDynamic)
return SymbolName;
std::string FullSymbolName(SymbolName);
@ -143,7 +144,7 @@ static std::string getFullSymbolName(const ELFO &Obj,
template <typename ELFO>
static void
getSectionNameIndex(const ELFO &Obj, typename ELFO::Elf_Sym_Iter Symbol,
getSectionNameIndex(const ELFO &Obj, const typename ELFO::Elf_Sym *Symbol,
StringRef &SectionName, unsigned &SectionIndex) {
SectionIndex = Symbol->st_shndx;
if (Symbol->isUndefined())
@ -645,11 +646,9 @@ void ELFDumper<ELFT>::printSections() {
if (opts::SectionSymbols) {
ListScope D(W, "Symbols");
for (typename ELFO::Elf_Sym_Iter SymI = Obj->begin_symbols(),
SymE = Obj->end_symbols();
SymI != SymE; ++SymI) {
if (Obj->getSection(&*SymI) == Section)
printSymbol(SymI);
for (const typename ELFO::Elf_Sym &Sym : Obj->symbols()) {
if (Obj->getSection(&Sym) == Section)
printSymbol(&Sym, false);
}
}
@ -697,8 +696,8 @@ void ELFDumper<ELFT>::printDynamicRelocations() {
Obj->getRelocationTypeName(RelI->getType(Obj->isMips64EL()), RelocName);
StringRef SymbolName;
uint32_t SymIndex = RelI->getSymbol(Obj->isMips64EL());
typename ELFO::Elf_Sym_Iter Sym = Obj->begin_dynamic_symbols() + SymIndex;
SymbolName = errorOrDefault(Obj->getSymbolName(Sym));
const typename ELFO::Elf_Sym *Sym = Obj->begin_dynamic_symbols() + SymIndex;
SymbolName = errorOrDefault(Obj->getSymbolName(Sym, true));
if (opts::ExpandRelocs) {
DictScope Group(W, "Relocation");
W.printHex("Offset", RelI->r_offset);
@ -757,7 +756,9 @@ void ELFDumper<ELFT>::printRelocation(const Elf_Shdr *Sec,
if (SecName)
TargetName = SecName.get();
} else if (Sym.first) {
TargetName = errorOrDefault(Obj->getSymbolName(Sym.first, Sym.second));
const Elf_Shdr *SymTable = Sym.first;
const Elf_Shdr *StrTable = Obj->getSection(SymTable->sh_link);
TargetName = errorOrDefault(Obj->getSymbolName(StrTable, Sym.second));
}
if (opts::ExpandRelocs) {
@ -778,30 +779,25 @@ void ELFDumper<ELFT>::printRelocation(const Elf_Shdr *Sec,
template<class ELFT>
void ELFDumper<ELFT>::printSymbols() {
ListScope Group(W, "Symbols");
for (typename ELFO::Elf_Sym_Iter SymI = Obj->begin_symbols(),
SymE = Obj->end_symbols();
SymI != SymE; ++SymI) {
printSymbol(SymI);
}
for (const typename ELFO::Elf_Sym &Sym : Obj->symbols())
printSymbol(&Sym, false);
}
template<class ELFT>
void ELFDumper<ELFT>::printDynamicSymbols() {
ListScope Group(W, "DynamicSymbols");
for (typename ELFO::Elf_Sym_Iter SymI = Obj->begin_dynamic_symbols(),
SymE = Obj->end_dynamic_symbols();
SymI != SymE; ++SymI) {
printSymbol(SymI);
}
for (const typename ELFO::Elf_Sym &Sym : Obj->dynamic_symbols())
printSymbol(&Sym, true);
}
template <class ELFT>
void ELFDumper<ELFT>::printSymbol(typename ELFO::Elf_Sym_Iter Symbol) {
void ELFDumper<ELFT>::printSymbol(const typename ELFO::Elf_Sym *Symbol,
bool IsDynamic) {
unsigned SectionIndex = 0;
StringRef SectionName;
getSectionNameIndex(*Obj, Symbol, SectionName, SectionIndex);
std::string FullSymbolName = getFullSymbolName(*Obj, Symbol);
std::string FullSymbolName = getFullSymbolName(*Obj, Symbol, IsDynamic);
DictScope D(W, "Symbol");
W.printNumber("Name", FullSymbolName, Symbol->st_name);
@ -1160,13 +1156,13 @@ template <class ELFT> class MipsGOTParser {
public:
typedef object::ELFFile<ELFT> ObjectFile;
typedef typename ObjectFile::Elf_Shdr Elf_Shdr;
typedef typename ObjectFile::Elf_Sym Elf_Sym;
MipsGOTParser(const ObjectFile *Obj, StreamWriter &W) : Obj(Obj), W(W) {}
void parseGOT(const Elf_Shdr &GOTShdr);
private:
typedef typename ObjectFile::Elf_Sym_Iter Elf_Sym_Iter;
typedef typename ObjectFile::Elf_Addr GOTEntry;
typedef typename ObjectFile::template ELFEntityIterator<const GOTEntry>
GOTIter;
@ -1180,7 +1176,7 @@ private:
bool getGOTTags(uint64_t &LocalGotNum, uint64_t &GotSym);
void printGotEntry(uint64_t GotAddr, GOTIter BeginIt, GOTIter It);
void printGlobalGotEntry(uint64_t GotAddr, GOTIter BeginIt, GOTIter It,
Elf_Sym_Iter Sym);
const Elf_Sym *Sym, bool IsDynamic);
};
}
@ -1206,8 +1202,8 @@ void MipsGOTParser<ELFT>::parseGOT(const Elf_Shdr &GOTShdr) {
return;
}
Elf_Sym_Iter DynSymBegin = Obj->begin_dynamic_symbols();
Elf_Sym_Iter DynSymEnd = Obj->end_dynamic_symbols();
const Elf_Sym *DynSymBegin = Obj->begin_dynamic_symbols();
const Elf_Sym *DynSymEnd = Obj->end_dynamic_symbols();
std::size_t DynSymTotal = std::size_t(std::distance(DynSymBegin, DynSymEnd));
if (DtGotSym > DynSymTotal) {
@ -1255,10 +1251,10 @@ void MipsGOTParser<ELFT>::parseGOT(const Elf_Shdr &GOTShdr) {
ListScope GS(W, "Global entries");
GOTIter GotGlobalEnd = makeGOTIter(*GOT, DtLocalGotNum + GlobalGotNum);
Elf_Sym_Iter GotDynSym = DynSymBegin + DtGotSym;
const Elf_Sym *GotDynSym = DynSymBegin + DtGotSym;
for (; It != GotGlobalEnd; ++It) {
DictScope D(W, "Entry");
printGlobalGotEntry(GOTShdr.sh_addr, GotBegin, It, GotDynSym++);
printGlobalGotEntry(GOTShdr.sh_addr, GotBegin, It, GotDynSym++, true);
}
}
@ -1319,7 +1315,8 @@ void MipsGOTParser<ELFT>::printGotEntry(uint64_t GotAddr, GOTIter BeginIt,
template <class ELFT>
void MipsGOTParser<ELFT>::printGlobalGotEntry(uint64_t GotAddr, GOTIter BeginIt,
GOTIter It, Elf_Sym_Iter Sym) {
GOTIter It, const Elf_Sym *Sym,
bool IsDynamic) {
printGotEntry(GotAddr, BeginIt, It);
W.printHex("Value", Sym->st_value);
@ -1330,7 +1327,7 @@ void MipsGOTParser<ELFT>::printGlobalGotEntry(uint64_t GotAddr, GOTIter BeginIt,
getSectionNameIndex(*Obj, Sym, SectionName, SectionIndex);
W.printHex("Section", SectionName, SectionIndex);
std::string FullSymbolName = getFullSymbolName(*Obj, Sym);
std::string FullSymbolName = getFullSymbolName(*Obj, Sym, IsDynamic);
W.printNumber("Name", FullSymbolName, Sym->st_name);
}

19
llvm/tools/obj2yaml/elf2yaml.cpp
View File

@ -23,12 +23,12 @@ template <class ELFT>
class ELFDumper {
typedef object::Elf_Sym_Impl<ELFT> Elf_Sym;
typedef typename object::ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
typedef typename object::ELFFile<ELFT>::Elf_Sym_Iter Elf_Sym_Iter;
typedef typename object::ELFFile<ELFT>::Elf_Word Elf_Word;
const object::ELFFile<ELFT> &Obj;
std::error_code dumpSymbol(Elf_Sym_Iter Sym, ELFYAML::Symbol &S);
std::error_code dumpSymbol(const Elf_Sym *Sym, bool IsDynamic,
ELFYAML::Symbol &S);
std::error_code dumpCommonSection(const Elf_Shdr *Shdr, ELFYAML::Section &S);
std::error_code dumpCommonRelocationSection(const Elf_Shdr *Shdr,
ELFYAML::RelocationSection &S);
@ -122,7 +122,7 @@ ErrorOr<ELFYAML::Object *> ELFDumper<ELFT>::dump() {
}
ELFYAML::Symbol S;
if (std::error_code EC = ELFDumper<ELFT>::dumpSymbol(SI, S))
if (std::error_code EC = ELFDumper<ELFT>::dumpSymbol(SI, false, S))
return EC;
switch (SI->getBinding())
@ -145,14 +145,14 @@ ErrorOr<ELFYAML::Object *> ELFDumper<ELFT>::dump() {
}
template <class ELFT>
std::error_code ELFDumper<ELFT>::dumpSymbol(Elf_Sym_Iter Sym,
std::error_code ELFDumper<ELFT>::dumpSymbol(const Elf_Sym *Sym, bool IsDynamic,
ELFYAML::Symbol &S) {
S.Type = Sym->getType();
S.Value = Sym->st_value;
S.Size = Sym->st_size;
S.Other = Sym->st_other;
ErrorOr<StringRef> NameOrErr = Obj.getSymbolName(Sym);
ErrorOr<StringRef> NameOrErr = Obj.getSymbolName(Sym, IsDynamic);
if (std::error_code EC = NameOrErr.getError())
return EC;
S.Name = NameOrErr.get();
@ -182,8 +182,10 @@ std::error_code ELFDumper<ELFT>::dumpRelocation(const Elf_Shdr *Shdr,
if (!NamePair.first)
return obj2yaml_error::success;
ErrorOr<StringRef> NameOrErr =
Obj.getSymbolName(NamePair.first, NamePair.second);
const Elf_Shdr *SymTab = NamePair.first;
const Elf_Shdr *StrTab = Obj.getSection(SymTab->sh_link);
ErrorOr<StringRef> NameOrErr = Obj.getSymbolName(StrTab, NamePair.second);
if (std::error_code EC = NameOrErr.getError())
return EC;
R.Symbol = NameOrErr.get();
@ -300,10 +302,11 @@ ErrorOr<ELFYAML::Group *> ELFDumper<ELFT>::dumpGroup(const Elf_Shdr *Shdr) {
// Get sh_info which is the signature.
const Elf_Sym *symbol = Obj.getSymbol(Shdr->sh_info);
const Elf_Shdr *symtab = Obj.getSection(Shdr->sh_link);
const Elf_Shdr *StrTab = Obj.getSection(symtab->sh_link);
auto sectionContents = Obj.getSectionContents(Shdr);
if (std::error_code ec = sectionContents.getError())
return ec;
ErrorOr<StringRef> symbolName = Obj.getSymbolName(symtab, symbol);
ErrorOr<StringRef> symbolName = Obj.getSymbolName(StrTab, symbol);
if (std::error_code EC = symbolName.getError())
return EC;
S->Info = *symbolName;