llvm-6502/include/llvm/Object/ELFYAML.h
Sean Silva 4235ba32f2 [yaml2obj][ELF] Don't explicitly set Binding with STB_*
Instead, just have 3 sub-lists, one for each of
{STB_LOCAL,STB_GLOBAL,STB_WEAK}.

This allows us to be a lot more explicit w.r.t. the symbol ordering in
the object file, because if we allowed explicitly setting the STB_*
`Binding` key for the symbol, then we might have ended up having to
shuffle STB_LOCAL symbols to the front of the list, which is likely to
cause confusion and potential for error.

Also, this new approach is simpler ;)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184506 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-21 00:27:50 +00:00

161 lines
4.4 KiB
C++

//===- ELFYAML.h - ELF YAMLIO implementation --------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file declares classes for handling the YAML representation
/// of ELF.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_OBJECT_ELFYAML_H
#define LLVM_OBJECT_ELFYAML_H
#include "llvm/Object/YAML.h"
#include "llvm/Support/ELF.h"
namespace llvm {
namespace ELFYAML {
// These types are invariant across 32/64-bit ELF, so for simplicity just
// directly give them their exact sizes. We don't need to worry about
// endianness because these are just the types in the YAMLIO structures,
// and are appropriately converted to the necessary endianness when
// reading/generating binary object files.
// The naming of these types is intended to be ELF_PREFIX, where PREFIX is
// the common prefix of the respective constants. E.g. ELF_EM corresponds
// to the `e_machine` constants, like `EM_X86_64`.
// In the future, these would probably be better suited by C++11 enum
// class's with appropriate fixed underlying type.
LLVM_YAML_STRONG_TYPEDEF(uint16_t, ELF_ET)
LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_EM)
LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFCLASS)
LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFDATA)
LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFOSABI)
LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_SHT)
// Just use 64, since it can hold 32-bit values too.
LLVM_YAML_STRONG_TYPEDEF(uint64_t, ELF_SHF)
LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_STT)
// For now, hardcode 64 bits everywhere that 32 or 64 would be needed
// since 64-bit can hold 32-bit values too.
struct FileHeader {
ELF_ELFCLASS Class;
ELF_ELFDATA Data;
ELF_ELFOSABI OSABI;
ELF_ET Type;
ELF_EM Machine;
llvm::yaml::Hex64 Entry;
};
struct Symbol {
StringRef Name;
ELF_STT Type;
StringRef Section;
llvm::yaml::Hex64 Value;
llvm::yaml::Hex64 Size;
};
struct LocalGlobalWeakSymbols {
std::vector<Symbol> Local;
std::vector<Symbol> Global;
std::vector<Symbol> Weak;
};
struct Section {
StringRef Name;
ELF_SHT Type;
ELF_SHF Flags;
llvm::yaml::Hex64 Address;
object::yaml::BinaryRef Content;
StringRef Link;
llvm::yaml::Hex64 AddressAlign;
// For SHT_SYMTAB; should be empty otherwise.
LocalGlobalWeakSymbols Symbols;
};
struct Object {
FileHeader Header;
std::vector<Section> Sections;
};
} // end namespace ELFYAML
} // end namespace llvm
LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::Section)
LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::Symbol)
namespace llvm {
namespace yaml {
template <>
struct ScalarEnumerationTraits<ELFYAML::ELF_ET> {
static void enumeration(IO &IO, ELFYAML::ELF_ET &Value);
};
template <>
struct ScalarEnumerationTraits<ELFYAML::ELF_EM> {
static void enumeration(IO &IO, ELFYAML::ELF_EM &Value);
};
template <>
struct ScalarEnumerationTraits<ELFYAML::ELF_ELFCLASS> {
static void enumeration(IO &IO, ELFYAML::ELF_ELFCLASS &Value);
};
template <>
struct ScalarEnumerationTraits<ELFYAML::ELF_ELFDATA> {
static void enumeration(IO &IO, ELFYAML::ELF_ELFDATA &Value);
};
template <>
struct ScalarEnumerationTraits<ELFYAML::ELF_ELFOSABI> {
static void enumeration(IO &IO, ELFYAML::ELF_ELFOSABI &Value);
};
template <>
struct ScalarEnumerationTraits<ELFYAML::ELF_SHT> {
static void enumeration(IO &IO, ELFYAML::ELF_SHT &Value);
};
template <>
struct ScalarBitSetTraits<ELFYAML::ELF_SHF> {
static void bitset(IO &IO, ELFYAML::ELF_SHF &Value);
};
template <>
struct ScalarEnumerationTraits<ELFYAML::ELF_STT> {
static void enumeration(IO &IO, ELFYAML::ELF_STT &Value);
};
template <>
struct MappingTraits<ELFYAML::FileHeader> {
static void mapping(IO &IO, ELFYAML::FileHeader &FileHdr);
};
template <>
struct MappingTraits<ELFYAML::Symbol> {
static void mapping(IO &IO, ELFYAML::Symbol &Symbol);
};
template <>
struct MappingTraits<ELFYAML::LocalGlobalWeakSymbols> {
static void mapping(IO &IO, ELFYAML::LocalGlobalWeakSymbols &Symbols);
};
template <>
struct MappingTraits<ELFYAML::Section> {
static void mapping(IO &IO, ELFYAML::Section &Section);
};
template <>
struct MappingTraits<ELFYAML::Object> {
static void mapping(IO &IO, ELFYAML::Object &Object);
};
} // end namespace yaml
} // end namespace llvm
#endif