mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192519 91177308-0d34-0410-b5e6-96231b3b80d8
1101 lines
34 KiB
C++
1101 lines
34 KiB
C++
//===- ELFObjectFile.h - ELF object file implementation ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the ELFObjectFile template class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECT_ELF_OBJECT_FILE_H
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#define LLVM_OBJECT_ELF_OBJECT_FILE_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/PointerIntPair.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/ELF.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cctype>
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#include <limits>
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#include <utility>
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namespace llvm {
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namespace object {
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template <class ELFT>
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class ELFObjectFile : public ObjectFile {
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public:
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LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
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typedef typename ELFFile<ELFT>::uintX_t uintX_t;
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typedef typename ELFFile<ELFT>::Elf_Sym Elf_Sym;
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typedef typename ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
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typedef typename ELFFile<ELFT>::Elf_Rel Elf_Rel;
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typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela;
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typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn;
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typedef typename ELFFile<ELFT>::Elf_Sym_Iter Elf_Sym_Iter;
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typedef typename ELFFile<ELFT>::Elf_Shdr_Iter Elf_Shdr_Iter;
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typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
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protected:
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ELFFile<ELFT> EF;
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virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
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virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
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virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
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virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
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virtual error_code getSymbolAlignment(DataRefImpl Symb, uint32_t &Res) const;
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virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
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virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
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virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
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virtual error_code getSymbolType(DataRefImpl Symb,
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SymbolRef::Type &Res) const;
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virtual error_code getSymbolSection(DataRefImpl Symb,
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section_iterator &Res) const;
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virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
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virtual error_code getLibraryNext(DataRefImpl Data, LibraryRef &Result) const;
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virtual error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const;
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virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
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virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
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virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
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virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
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virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
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virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
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virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
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bool &Res) const;
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virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const;
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virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
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bool &Result) const;
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virtual relocation_iterator section_rel_begin(DataRefImpl Sec) const;
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virtual relocation_iterator section_rel_end(DataRefImpl Sec) const;
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virtual section_iterator getRelocatedSection(DataRefImpl Sec) const;
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virtual error_code getRelocationNext(DataRefImpl Rel,
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RelocationRef &Res) const;
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virtual error_code getRelocationAddress(DataRefImpl Rel, uint64_t &Res) const;
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virtual error_code getRelocationOffset(DataRefImpl Rel, uint64_t &Res) const;
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virtual symbol_iterator getRelocationSymbol(DataRefImpl Rel) const;
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virtual error_code getRelocationType(DataRefImpl Rel, uint64_t &Res) const;
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virtual error_code getRelocationTypeName(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const;
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virtual error_code
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getRelocationValueString(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const;
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protected: // ELF specific protected members.
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const Elf_Sym *getSymbol(DataRefImpl Symb) const;
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uint64_t getROffset(DataRefImpl Rel) const;
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StringRef getRelocationTypeName(uint32_t Type) const;
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/// \brief Get the relocation section that contains \a Rel.
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const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
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return EF.getSection(Rel.d.a);
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}
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const Elf_Rel *getRel(DataRefImpl Rel) const;
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const Elf_Rela *getRela(DataRefImpl Rela) const;
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Elf_Sym_Iter toELFSymIter(DataRefImpl Symb) const {
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bool IsDynamic = Symb.p & 1;
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if (IsDynamic)
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return Elf_Sym_Iter(
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EF.begin_dynamic_symbols().getEntSize(),
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reinterpret_cast<const char *>(Symb.p & ~uintptr_t(1)), IsDynamic);
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return Elf_Sym_Iter(EF.begin_symbols().getEntSize(),
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reinterpret_cast<const char *>(Symb.p), IsDynamic);
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}
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DataRefImpl toDRI(Elf_Sym_Iter Symb) const {
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DataRefImpl DRI;
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DRI.p = reinterpret_cast<uintptr_t>(Symb.get()) |
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static_cast<uintptr_t>(Symb.isDynamic());
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return DRI;
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}
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Elf_Shdr_Iter toELFShdrIter(DataRefImpl Sec) const {
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return Elf_Shdr_Iter(EF.getHeader()->e_shentsize,
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reinterpret_cast<const char *>(Sec.p));
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}
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DataRefImpl toDRI(Elf_Shdr_Iter Sec) const {
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DataRefImpl DRI;
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DRI.p = reinterpret_cast<uintptr_t>(Sec.get());
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return DRI;
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}
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DataRefImpl toDRI(const Elf_Shdr *Sec) const {
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DataRefImpl DRI;
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DRI.p = reinterpret_cast<uintptr_t>(Sec);
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return DRI;
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}
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Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
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return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
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reinterpret_cast<const char *>(Dyn.p));
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}
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DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
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DataRefImpl DRI;
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DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
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return DRI;
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}
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// This flag is used for classof, to distinguish ELFObjectFile from
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// its subclass. If more subclasses will be created, this flag will
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// have to become an enum.
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bool isDyldELFObject;
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public:
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ELFObjectFile(MemoryBuffer *Object, error_code &ec);
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virtual symbol_iterator begin_symbols() const;
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virtual symbol_iterator end_symbols() const;
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virtual symbol_iterator begin_dynamic_symbols() const;
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virtual symbol_iterator end_dynamic_symbols() const;
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virtual section_iterator begin_sections() const;
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virtual section_iterator end_sections() const;
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virtual library_iterator begin_libraries_needed() const;
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virtual library_iterator end_libraries_needed() const;
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error_code getRelocationAddend(DataRefImpl Rel, int64_t &Res) const;
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error_code getSymbolVersion(SymbolRef Symb, StringRef &Version,
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bool &IsDefault) const;
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virtual uint8_t getBytesInAddress() const;
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virtual StringRef getFileFormatName() const;
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virtual StringRef getObjectType() const { return "ELF"; }
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virtual unsigned getArch() const;
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virtual StringRef getLoadName() const;
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const ELFFile<ELFT> *getELFFile() const { return &EF; }
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bool isDyldType() const { return isDyldELFObject; }
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static inline bool classof(const Binary *v) {
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return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
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ELFT::Is64Bits);
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}
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};
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// Use an alignment of 2 for the typedefs since that is the worst case for
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// ELF files in archives.
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typedef ELFObjectFile<ELFType<support::little, 2, false> > ELF32LEObjectFile;
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typedef ELFObjectFile<ELFType<support::little, 2, true> > ELF64LEObjectFile;
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typedef ELFObjectFile<ELFType<support::big, 2, false> > ELF32BEObjectFile;
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typedef ELFObjectFile<ELFType<support::big, 2, true> > ELF64BEObjectFile;
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolNext(DataRefImpl Symb,
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SymbolRef &Result) const {
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Result = SymbolRef(toDRI(++toELFSymIter(Symb)), this);
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return object_error::success;
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb,
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StringRef &Result) const {
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ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb));
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if (!Name)
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return Name;
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Result = *Name;
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return object_error::success;
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolVersion(SymbolRef SymRef,
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StringRef &Version,
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bool &IsDefault) const {
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DataRefImpl Symb = SymRef.getRawDataRefImpl();
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const Elf_Sym *symb = getSymbol(Symb);
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ErrorOr<StringRef> Ver =
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EF.getSymbolVersion(EF.getSection(Symb.d.b), symb, IsDefault);
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if (!Ver)
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return Ver;
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Version = *Ver;
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return object_error::success;
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolFileOffset(DataRefImpl Symb,
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uint64_t &Result) const {
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const Elf_Sym *ESym = getSymbol(Symb);
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const Elf_Shdr *ESec;
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switch (EF.getSymbolTableIndex(ESym)) {
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case ELF::SHN_COMMON:
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// Unintialized symbols have no offset in the object file
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case ELF::SHN_UNDEF:
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Result = UnknownAddressOrSize;
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return object_error::success;
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case ELF::SHN_ABS:
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Result = ESym->st_value;
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return object_error::success;
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default:
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ESec = EF.getSection(ESym);
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}
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switch (ESym->getType()) {
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case ELF::STT_SECTION:
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Result = ESec ? ESec->sh_offset : UnknownAddressOrSize;
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return object_error::success;
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case ELF::STT_FUNC:
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case ELF::STT_OBJECT:
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case ELF::STT_NOTYPE:
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Result = ESym->st_value + (ESec ? ESec->sh_offset : 0);
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return object_error::success;
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default:
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Result = UnknownAddressOrSize;
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return object_error::success;
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}
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
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uint64_t &Result) const {
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const Elf_Sym *ESym = getSymbol(Symb);
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const Elf_Shdr *ESec;
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switch (EF.getSymbolTableIndex(ESym)) {
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case ELF::SHN_COMMON:
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case ELF::SHN_UNDEF:
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Result = UnknownAddressOrSize;
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return object_error::success;
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case ELF::SHN_ABS:
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Result = ESym->st_value;
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return object_error::success;
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default:
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ESec = EF.getSection(ESym);
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}
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switch (ESym->getType()) {
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case ELF::STT_SECTION:
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Result = ESec ? ESec->sh_addr : UnknownAddressOrSize;
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return object_error::success;
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case ELF::STT_FUNC:
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case ELF::STT_OBJECT:
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case ELF::STT_NOTYPE:
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bool IsRelocatable;
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switch (EF.getHeader()->e_type) {
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case ELF::ET_EXEC:
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case ELF::ET_DYN:
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IsRelocatable = false;
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break;
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default:
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IsRelocatable = true;
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}
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Result = ESym->st_value;
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// Clear the ARM/Thumb indicator flag.
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if (EF.getHeader()->e_machine == ELF::EM_ARM)
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Result &= ~1;
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if (IsRelocatable && ESec != 0)
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Result += ESec->sh_addr;
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return object_error::success;
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default:
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Result = UnknownAddressOrSize;
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return object_error::success;
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}
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb,
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uint32_t &Res) const {
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Elf_Sym_Iter Sym = toELFSymIter(Symb);
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if (Sym->st_shndx == ELF::SHN_COMMON)
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Res = Sym->st_value;
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else
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Res = 0;
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return object_error::success;
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Symb,
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uint64_t &Result) const {
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Result = toELFSymIter(Symb)->st_size;
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return object_error::success;
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolNMTypeChar(DataRefImpl Symb,
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char &Result) const {
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const Elf_Sym *ESym = getSymbol(Symb);
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const Elf_Shdr *ESec = EF.getSection(ESym);
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char ret = '?';
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if (ESec) {
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switch (ESec->sh_type) {
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case ELF::SHT_PROGBITS:
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case ELF::SHT_DYNAMIC:
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switch (ESec->sh_flags) {
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case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
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ret = 't';
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break;
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case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
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ret = 'd';
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break;
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case ELF::SHF_ALLOC:
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case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
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case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
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ret = 'r';
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break;
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}
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break;
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case ELF::SHT_NOBITS:
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ret = 'b';
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}
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}
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switch (EF.getSymbolTableIndex(ESym)) {
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case ELF::SHN_UNDEF:
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if (ret == '?')
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ret = 'U';
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break;
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case ELF::SHN_ABS:
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ret = 'a';
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break;
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case ELF::SHN_COMMON:
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ret = 'c';
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break;
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}
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switch (ESym->getBinding()) {
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case ELF::STB_GLOBAL:
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ret = ::toupper(ret);
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break;
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case ELF::STB_WEAK:
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if (EF.getSymbolTableIndex(ESym) == ELF::SHN_UNDEF)
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ret = 'w';
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else if (ESym->getType() == ELF::STT_OBJECT)
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ret = 'V';
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else
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ret = 'W';
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}
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if (ret == '?' && ESym->getType() == ELF::STT_SECTION) {
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ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb));
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if (!Name)
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return Name;
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Result = StringSwitch<char>(*Name)
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.StartsWith(".debug", 'N')
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.StartsWith(".note", 'n')
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.Default('?');
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return object_error::success;
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}
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Result = ret;
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return object_error::success;
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb,
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SymbolRef::Type &Result) const {
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const Elf_Sym *ESym = getSymbol(Symb);
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switch (ESym->getType()) {
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case ELF::STT_NOTYPE:
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Result = SymbolRef::ST_Unknown;
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break;
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case ELF::STT_SECTION:
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Result = SymbolRef::ST_Debug;
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break;
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case ELF::STT_FILE:
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Result = SymbolRef::ST_File;
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break;
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case ELF::STT_FUNC:
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Result = SymbolRef::ST_Function;
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break;
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case ELF::STT_OBJECT:
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case ELF::STT_COMMON:
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case ELF::STT_TLS:
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Result = SymbolRef::ST_Data;
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break;
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default:
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Result = SymbolRef::ST_Other;
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break;
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}
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return object_error::success;
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}
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template <class ELFT>
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error_code ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb,
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uint32_t &Result) const {
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const Elf_Sym *ESym = getSymbol(Symb);
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Result = SymbolRef::SF_None;
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if (ESym->getBinding() != ELF::STB_LOCAL)
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Result |= SymbolRef::SF_Global;
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if (ESym->getBinding() == ELF::STB_WEAK)
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Result |= SymbolRef::SF_Weak;
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if (ESym->st_shndx == ELF::SHN_ABS)
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Result |= SymbolRef::SF_Absolute;
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if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
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ESym == &*EF.begin_symbols())
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Result |= SymbolRef::SF_FormatSpecific;
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if (EF.getSymbolTableIndex(ESym) == ELF::SHN_UNDEF)
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Result |= SymbolRef::SF_Undefined;
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if (ESym->getType() == ELF::STT_COMMON ||
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EF.getSymbolTableIndex(ESym) == ELF::SHN_COMMON)
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Result |= SymbolRef::SF_Common;
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|
|
if (ESym->getType() == ELF::STT_TLS)
|
|
Result |= SymbolRef::SF_ThreadLocal;
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
|
|
section_iterator &Res) const {
|
|
const Elf_Sym *ESym = getSymbol(Symb);
|
|
const Elf_Shdr *ESec = EF.getSection(ESym);
|
|
if (!ESec)
|
|
Res = end_sections();
|
|
else {
|
|
DataRefImpl Sec;
|
|
Sec.p = reinterpret_cast<intptr_t>(ESec);
|
|
Res = section_iterator(SectionRef(Sec, this));
|
|
}
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb,
|
|
uint64_t &Val) const {
|
|
const Elf_Sym *ESym = getSymbol(Symb);
|
|
Val = ESym->st_value;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSectionNext(DataRefImpl Sec,
|
|
SectionRef &Result) const {
|
|
Result = SectionRef(toDRI(++toELFShdrIter(Sec)), this);
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
|
|
StringRef &Result) const {
|
|
ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
|
|
if (!Name)
|
|
return Name;
|
|
Result = *Name;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec,
|
|
uint64_t &Result) const {
|
|
Result = toELFShdrIter(Sec)->sh_addr;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec,
|
|
uint64_t &Result) const {
|
|
Result = toELFShdrIter(Sec)->sh_size;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
|
|
StringRef &Result) const {
|
|
Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
|
|
Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec,
|
|
uint64_t &Result) const {
|
|
Result = toELFShdrIter(Sec)->sh_addralign;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
|
|
Result = EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
|
|
EShdr->sh_type == ELF::SHT_PROGBITS;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
|
|
Result = EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
|
|
EShdr->sh_type == ELF::SHT_NOBITS;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code
|
|
ELFObjectFile<ELFT>::isSectionRequiredForExecution(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_ALLOC;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::isSectionZeroInit(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::isSectionReadOnlyData(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
|
|
Result = !(EShdr->sh_flags & (ELF::SHF_WRITE | ELF::SHF_EXECINSTR));
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
|
|
DataRefImpl Symb,
|
|
bool &Result) const {
|
|
Elf_Sym_Iter ESym = toELFSymIter(Symb);
|
|
|
|
uintX_t Index = ESym->st_shndx;
|
|
bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
|
|
|
|
Result = !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
relocation_iterator
|
|
ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
|
|
DataRefImpl RelData;
|
|
uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
|
|
RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
|
|
RelData.d.b = 0;
|
|
return relocation_iterator(RelocationRef(RelData, this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
relocation_iterator
|
|
ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
|
|
DataRefImpl RelData;
|
|
uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
|
|
const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
|
|
RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
|
|
if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
|
|
RelData.d.b = 0;
|
|
else
|
|
RelData.d.b = S->sh_size / S->sh_entsize;
|
|
|
|
return relocation_iterator(RelocationRef(RelData, this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
section_iterator
|
|
ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
|
|
if (EF.getHeader()->e_type != ELF::ET_REL)
|
|
return end_sections();
|
|
|
|
Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
|
|
uintX_t Type = EShdr->sh_type;
|
|
if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
|
|
return end_sections();
|
|
|
|
const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
|
|
return section_iterator(SectionRef(toDRI(R), this));
|
|
}
|
|
|
|
// Relocations
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getRelocationNext(DataRefImpl Rel,
|
|
RelocationRef &Result) const {
|
|
++Rel.d.b;
|
|
Result = RelocationRef(Rel, this);
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
symbol_iterator
|
|
ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
|
|
uint32_t symbolIdx;
|
|
const Elf_Shdr *sec = getRelSection(Rel);
|
|
switch (sec->sh_type) {
|
|
default:
|
|
report_fatal_error("Invalid section type in Rel!");
|
|
case ELF::SHT_REL: {
|
|
symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
|
|
break;
|
|
}
|
|
case ELF::SHT_RELA: {
|
|
symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
|
|
break;
|
|
}
|
|
}
|
|
if (!symbolIdx)
|
|
return end_symbols();
|
|
|
|
const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
|
|
|
|
DataRefImpl SymbolData;
|
|
switch (SymSec->sh_type) {
|
|
default:
|
|
report_fatal_error("Invalid symbol table section type!");
|
|
case ELF::SHT_SYMTAB:
|
|
SymbolData = toDRI(EF.begin_symbols() + symbolIdx);
|
|
break;
|
|
case ELF::SHT_DYNSYM:
|
|
SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx);
|
|
break;
|
|
}
|
|
|
|
return symbol_iterator(SymbolRef(SymbolData, this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
|
|
uint64_t &Result) const {
|
|
Result = getROffset(Rel);
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel,
|
|
uint64_t &Result) const {
|
|
Result = getROffset(Rel);
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
|
|
const Elf_Shdr *sec = getRelSection(Rel);
|
|
switch (sec->sh_type) {
|
|
default:
|
|
report_fatal_error("Invalid section type in Rel!");
|
|
case ELF::SHT_REL:
|
|
return getRel(Rel)->r_offset;
|
|
case ELF::SHT_RELA:
|
|
return getRela(Rel)->r_offset;
|
|
}
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel,
|
|
uint64_t &Result) const {
|
|
const Elf_Shdr *sec = getRelSection(Rel);
|
|
switch (sec->sh_type) {
|
|
default:
|
|
report_fatal_error("Invalid section type in Rel!");
|
|
case ELF::SHT_REL: {
|
|
Result = getRel(Rel)->getType(EF.isMips64EL());
|
|
break;
|
|
}
|
|
case ELF::SHT_RELA: {
|
|
Result = getRela(Rel)->getType(EF.isMips64EL());
|
|
break;
|
|
}
|
|
}
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
|
|
return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getRelocationTypeName(
|
|
DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
|
|
const Elf_Shdr *sec = getRelSection(Rel);
|
|
uint32_t type;
|
|
switch (sec->sh_type) {
|
|
default:
|
|
return object_error::parse_failed;
|
|
case ELF::SHT_REL: {
|
|
type = getRel(Rel)->getType(EF.isMips64EL());
|
|
break;
|
|
}
|
|
case ELF::SHT_RELA: {
|
|
type = getRela(Rel)->getType(EF.isMips64EL());
|
|
break;
|
|
}
|
|
}
|
|
|
|
EF.getRelocationTypeName(type, Result);
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel,
|
|
int64_t &Result) const {
|
|
const Elf_Shdr *sec = getRelSection(Rel);
|
|
switch (sec->sh_type) {
|
|
default:
|
|
report_fatal_error("Invalid section type in Rel!");
|
|
case ELF::SHT_REL: {
|
|
Result = 0;
|
|
return object_error::success;
|
|
}
|
|
case ELF::SHT_RELA: {
|
|
Result = getRela(Rel)->r_addend;
|
|
return object_error::success;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getRelocationValueString(
|
|
DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
|
|
const Elf_Shdr *sec = getRelSection(Rel);
|
|
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(EF.isMips64EL());
|
|
symbol_index = getRel(Rel)->getSymbol(EF.isMips64EL());
|
|
// TODO: Read implicit addend from section data.
|
|
break;
|
|
}
|
|
case ELF::SHT_RELA: {
|
|
type = getRela(Rel)->getType(EF.isMips64EL());
|
|
symbol_index = getRela(Rel)->getSymbol(EF.isMips64EL());
|
|
addend = getRela(Rel)->r_addend;
|
|
break;
|
|
}
|
|
}
|
|
const Elf_Sym *symb =
|
|
EF.template getEntry<Elf_Sym>(sec->sh_link, symbol_index);
|
|
ErrorOr<StringRef> SymName =
|
|
EF.getSymbolName(EF.getSection(sec->sh_link), symb);
|
|
if (!SymName)
|
|
return SymName;
|
|
switch (EF.getHeader()->e_machine) {
|
|
case ELF::EM_X86_64:
|
|
switch (type) {
|
|
case ELF::R_X86_64_PC8:
|
|
case ELF::R_X86_64_PC16:
|
|
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;
|
|
case ELF::R_X86_64_8:
|
|
case ELF::R_X86_64_16:
|
|
case ELF::R_X86_64_32:
|
|
case ELF::R_X86_64_32S:
|
|
case ELF::R_X86_64_64: {
|
|
std::string fmtbuf;
|
|
raw_string_ostream fmt(fmtbuf);
|
|
fmt << *SymName << (addend < 0 ? "" : "+") << addend;
|
|
fmt.flush();
|
|
Result.append(fmtbuf.begin(), fmtbuf.end());
|
|
} break;
|
|
default:
|
|
res = "Unknown";
|
|
}
|
|
break;
|
|
case ELF::EM_AARCH64: {
|
|
std::string fmtbuf;
|
|
raw_string_ostream fmt(fmtbuf);
|
|
fmt << *SymName;
|
|
if (addend != 0)
|
|
fmt << (addend < 0 ? "" : "+") << addend;
|
|
fmt.flush();
|
|
Result.append(fmtbuf.begin(), fmtbuf.end());
|
|
break;
|
|
}
|
|
case ELF::EM_ARM:
|
|
case ELF::EM_HEXAGON:
|
|
res = *SymName;
|
|
break;
|
|
default:
|
|
res = "Unknown";
|
|
}
|
|
if (Result.empty())
|
|
Result.append(res.begin(), res.end());
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
const typename ELFFile<ELFT>::Elf_Sym *
|
|
ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
|
|
return &*toELFSymIter(Symb);
|
|
}
|
|
|
|
template <class ELFT>
|
|
const typename ELFObjectFile<ELFT>::Elf_Rel *
|
|
ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
|
|
return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
|
|
}
|
|
|
|
template <class ELFT>
|
|
const typename ELFObjectFile<ELFT>::Elf_Rela *
|
|
ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
|
|
return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
|
|
}
|
|
|
|
template <class ELFT>
|
|
ELFObjectFile<ELFT>::ELFObjectFile(MemoryBuffer *Object, error_code &ec)
|
|
: ObjectFile(getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
|
|
support::little,
|
|
ELFT::Is64Bits),
|
|
Object),
|
|
EF(Object, ec) {}
|
|
|
|
template <class ELFT>
|
|
symbol_iterator ELFObjectFile<ELFT>::begin_symbols() const {
|
|
return symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
symbol_iterator ELFObjectFile<ELFT>::end_symbols() const {
|
|
return symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
symbol_iterator ELFObjectFile<ELFT>::begin_dynamic_symbols() const {
|
|
return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
symbol_iterator ELFObjectFile<ELFT>::end_dynamic_symbols() const {
|
|
return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
section_iterator ELFObjectFile<ELFT>::begin_sections() const {
|
|
return section_iterator(SectionRef(toDRI(EF.begin_sections()), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
section_iterator ELFObjectFile<ELFT>::end_sections() const {
|
|
return section_iterator(SectionRef(toDRI(EF.end_sections()), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
StringRef ELFObjectFile<ELFT>::getLoadName() const {
|
|
Elf_Dyn_Iter DI = EF.begin_dynamic_table();
|
|
Elf_Dyn_Iter DE = EF.end_dynamic_table();
|
|
|
|
while (DI != DE && DI->getTag() != ELF::DT_SONAME)
|
|
++DI;
|
|
|
|
if (DI != DE)
|
|
return EF.getDynamicString(DI->getVal());
|
|
return "";
|
|
}
|
|
|
|
template <class ELFT>
|
|
library_iterator ELFObjectFile<ELFT>::begin_libraries_needed() const {
|
|
Elf_Dyn_Iter DI = EF.begin_dynamic_table();
|
|
Elf_Dyn_Iter DE = EF.end_dynamic_table();
|
|
|
|
while (DI != DE && DI->getTag() != ELF::DT_SONAME)
|
|
++DI;
|
|
|
|
return library_iterator(LibraryRef(toDRI(DI), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getLibraryNext(DataRefImpl Data,
|
|
LibraryRef &Result) const {
|
|
Elf_Dyn_Iter DI = toELFDynIter(Data);
|
|
Elf_Dyn_Iter DE = EF.end_dynamic_table();
|
|
|
|
// Skip to the next DT_NEEDED entry.
|
|
do
|
|
++DI;
|
|
while (DI != DE && DI->getTag() != ELF::DT_NEEDED);
|
|
|
|
Result = LibraryRef(toDRI(DI), this);
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
error_code ELFObjectFile<ELFT>::getLibraryPath(DataRefImpl Data,
|
|
StringRef &Res) const {
|
|
Res = EF.getDynamicString(toELFDynIter(Data)->getVal());
|
|
return object_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
library_iterator ELFObjectFile<ELFT>::end_libraries_needed() const {
|
|
return library_iterator(LibraryRef(toDRI(EF.end_dynamic_table()), this));
|
|
}
|
|
|
|
template <class ELFT>
|
|
uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
|
|
return ELFT::Is64Bits ? 8 : 4;
|
|
}
|
|
|
|
template <class ELFT>
|
|
StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
|
|
switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
|
|
case ELF::ELFCLASS32:
|
|
switch (EF.getHeader()->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";
|
|
case ELF::EM_HEXAGON:
|
|
return "ELF32-hexagon";
|
|
case ELF::EM_MIPS:
|
|
return "ELF32-mips";
|
|
case ELF::EM_PPC:
|
|
return "ELF32-ppc";
|
|
default:
|
|
return "ELF32-unknown";
|
|
}
|
|
case ELF::ELFCLASS64:
|
|
switch (EF.getHeader()->e_machine) {
|
|
case ELF::EM_386:
|
|
return "ELF64-i386";
|
|
case ELF::EM_X86_64:
|
|
return "ELF64-x86-64";
|
|
case ELF::EM_AARCH64:
|
|
return "ELF64-aarch64";
|
|
case ELF::EM_PPC64:
|
|
return "ELF64-ppc64";
|
|
case ELF::EM_S390:
|
|
return "ELF64-s390";
|
|
default:
|
|
return "ELF64-unknown";
|
|
}
|
|
default:
|
|
// FIXME: Proper error handling.
|
|
report_fatal_error("Invalid ELFCLASS!");
|
|
}
|
|
}
|
|
|
|
template <class ELFT>
|
|
unsigned ELFObjectFile<ELFT>::getArch() const {
|
|
switch (EF.getHeader()->e_machine) {
|
|
case ELF::EM_386:
|
|
return Triple::x86;
|
|
case ELF::EM_X86_64:
|
|
return Triple::x86_64;
|
|
case ELF::EM_AARCH64:
|
|
return Triple::aarch64;
|
|
case ELF::EM_ARM:
|
|
return Triple::arm;
|
|
case ELF::EM_HEXAGON:
|
|
return Triple::hexagon;
|
|
case ELF::EM_MIPS:
|
|
return (ELFT::TargetEndianness == support::little) ? Triple::mipsel
|
|
: Triple::mips;
|
|
case ELF::EM_PPC64:
|
|
return (ELFT::TargetEndianness == support::little) ? Triple::ppc64le
|
|
: Triple::ppc64;
|
|
case ELF::EM_S390:
|
|
return Triple::systemz;
|
|
default:
|
|
return Triple::UnknownArch;
|
|
}
|
|
}
|
|
|
|
/// FIXME: Maybe we should have a base ElfObjectFile that is not a template
|
|
/// and make these member functions?
|
|
static inline error_code getELFRelocationAddend(const RelocationRef R,
|
|
int64_t &Addend) {
|
|
const ObjectFile *Obj = R.getObjectFile();
|
|
DataRefImpl DRI = R.getRawDataRefImpl();
|
|
// Little-endian 32-bit
|
|
if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
|
|
return ELFObj->getRelocationAddend(DRI, Addend);
|
|
|
|
// Big-endian 32-bit
|
|
if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
|
|
return ELFObj->getRelocationAddend(DRI, Addend);
|
|
|
|
// Little-endian 64-bit
|
|
if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
|
|
return ELFObj->getRelocationAddend(DRI, Addend);
|
|
|
|
// Big-endian 64-bit
|
|
if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
|
|
return ELFObj->getRelocationAddend(DRI, Addend);
|
|
|
|
llvm_unreachable("Object passed to getELFRelocationAddend() is not ELF");
|
|
}
|
|
|
|
/// 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 ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
|
|
return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
|
|
|
|
// Big-endian 32-bit
|
|
if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
|
|
return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
|
|
|
|
// Little-endian 64-bit
|
|
if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
|
|
return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
|
|
|
|
// Big-endian 64-bit
|
|
if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
|
|
return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
|
|
|
|
llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|