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726b33f897
Although in reality the symbol table in ELF resides in a section, the standard requires that there be no more than one SHT_SYMTAB. To enforce this constraint, it is cleaner to group all the symbols under a top-level `Symbols` key on the object file. llvm-svn: 184627
164 lines
4.6 KiB
C++
164 lines
4.6 KiB
C++
//===- ELFYAML.h - ELF YAMLIO 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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/// \file
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/// \brief This file declares classes for handling the YAML representation
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/// of ELF.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECT_ELFYAML_H
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#define LLVM_OBJECT_ELFYAML_H
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#include "llvm/Object/YAML.h"
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#include "llvm/Support/ELF.h"
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namespace llvm {
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namespace ELFYAML {
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// These types are invariant across 32/64-bit ELF, so for simplicity just
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// directly give them their exact sizes. We don't need to worry about
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// endianness because these are just the types in the YAMLIO structures,
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// and are appropriately converted to the necessary endianness when
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// reading/generating binary object files.
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// The naming of these types is intended to be ELF_PREFIX, where PREFIX is
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// the common prefix of the respective constants. E.g. ELF_EM corresponds
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// to the `e_machine` constants, like `EM_X86_64`.
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// In the future, these would probably be better suited by C++11 enum
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// class's with appropriate fixed underlying type.
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LLVM_YAML_STRONG_TYPEDEF(uint16_t, ELF_ET)
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LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_EM)
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LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFCLASS)
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LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFDATA)
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LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFOSABI)
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LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_SHT)
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// Just use 64, since it can hold 32-bit values too.
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LLVM_YAML_STRONG_TYPEDEF(uint64_t, ELF_SHF)
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LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_STT)
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// For now, hardcode 64 bits everywhere that 32 or 64 would be needed
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// since 64-bit can hold 32-bit values too.
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struct FileHeader {
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ELF_ELFCLASS Class;
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ELF_ELFDATA Data;
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ELF_ELFOSABI OSABI;
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ELF_ET Type;
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ELF_EM Machine;
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llvm::yaml::Hex64 Entry;
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};
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struct Symbol {
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StringRef Name;
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ELF_STT Type;
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StringRef Section;
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llvm::yaml::Hex64 Value;
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llvm::yaml::Hex64 Size;
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};
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struct LocalGlobalWeakSymbols {
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std::vector<Symbol> Local;
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std::vector<Symbol> Global;
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std::vector<Symbol> Weak;
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};
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struct Section {
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StringRef Name;
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ELF_SHT Type;
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ELF_SHF Flags;
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llvm::yaml::Hex64 Address;
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object::yaml::BinaryRef Content;
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StringRef Link;
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llvm::yaml::Hex64 AddressAlign;
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};
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struct Object {
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FileHeader Header;
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std::vector<Section> Sections;
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// Although in reality the symbols reside in a section, it is a lot
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// cleaner and nicer if we read them from the YAML as a separate
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// top-level key, which automatically ensures that invariants like there
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// being a single SHT_SYMTAB section are upheld.
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LocalGlobalWeakSymbols Symbols;
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};
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} // end namespace ELFYAML
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} // end namespace llvm
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LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::Section)
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LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::Symbol)
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namespace llvm {
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namespace yaml {
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template <>
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struct ScalarEnumerationTraits<ELFYAML::ELF_ET> {
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static void enumeration(IO &IO, ELFYAML::ELF_ET &Value);
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};
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template <>
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struct ScalarEnumerationTraits<ELFYAML::ELF_EM> {
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static void enumeration(IO &IO, ELFYAML::ELF_EM &Value);
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};
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template <>
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struct ScalarEnumerationTraits<ELFYAML::ELF_ELFCLASS> {
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static void enumeration(IO &IO, ELFYAML::ELF_ELFCLASS &Value);
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};
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template <>
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struct ScalarEnumerationTraits<ELFYAML::ELF_ELFDATA> {
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static void enumeration(IO &IO, ELFYAML::ELF_ELFDATA &Value);
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};
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template <>
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struct ScalarEnumerationTraits<ELFYAML::ELF_ELFOSABI> {
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static void enumeration(IO &IO, ELFYAML::ELF_ELFOSABI &Value);
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};
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template <>
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struct ScalarEnumerationTraits<ELFYAML::ELF_SHT> {
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static void enumeration(IO &IO, ELFYAML::ELF_SHT &Value);
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};
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template <>
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struct ScalarBitSetTraits<ELFYAML::ELF_SHF> {
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static void bitset(IO &IO, ELFYAML::ELF_SHF &Value);
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};
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template <>
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struct ScalarEnumerationTraits<ELFYAML::ELF_STT> {
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static void enumeration(IO &IO, ELFYAML::ELF_STT &Value);
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};
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template <>
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struct MappingTraits<ELFYAML::FileHeader> {
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static void mapping(IO &IO, ELFYAML::FileHeader &FileHdr);
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};
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template <>
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struct MappingTraits<ELFYAML::Symbol> {
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static void mapping(IO &IO, ELFYAML::Symbol &Symbol);
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};
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template <>
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struct MappingTraits<ELFYAML::LocalGlobalWeakSymbols> {
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static void mapping(IO &IO, ELFYAML::LocalGlobalWeakSymbols &Symbols);
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};
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template <>
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struct MappingTraits<ELFYAML::Section> {
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static void mapping(IO &IO, ELFYAML::Section &Section);
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};
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template <>
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struct MappingTraits<ELFYAML::Object> {
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static void mapping(IO &IO, ELFYAML::Object &Object);
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};
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} // end namespace yaml
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} // end namespace llvm
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#endif
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