forked from OSchip/llvm-project
79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
//===- InputFiles.h -------------------------------------------------------===//
|
|
//
|
|
// The LLVM Linker
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLD_ELF_INPUT_FILES_H
|
|
#define LLD_ELF_INPUT_FILES_H
|
|
|
|
#include "lld/Core/LLVM.h"
|
|
#include "llvm/Object/ELF.h"
|
|
|
|
namespace lld {
|
|
namespace elf2 {
|
|
class SymbolBody;
|
|
class Chunk;
|
|
|
|
// The root class of input files.
|
|
class InputFile {
|
|
public:
|
|
enum Kind { ObjectKind };
|
|
Kind kind() const { return FileKind; }
|
|
virtual ~InputFile() {}
|
|
|
|
// Returns symbols defined by this file.
|
|
virtual ArrayRef<SymbolBody *> getSymbols() = 0;
|
|
|
|
// Reads a file (constructors don't do that).
|
|
virtual void parse() = 0;
|
|
|
|
protected:
|
|
explicit InputFile(Kind K, MemoryBufferRef M) : MB(M), FileKind(K) {}
|
|
MemoryBufferRef MB;
|
|
|
|
private:
|
|
const Kind FileKind;
|
|
};
|
|
|
|
// .o file.
|
|
template <class ELFT> class ObjectFile : public InputFile {
|
|
typedef typename llvm::object::ELFFile<ELFT>::Elf_Sym Elf_Sym;
|
|
typedef typename llvm::object::ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
|
|
typedef typename llvm::object::ELFFile<ELFT>::Elf_Sym_Range Elf_Sym_Range;
|
|
|
|
public:
|
|
explicit ObjectFile(MemoryBufferRef M) : InputFile(ObjectKind, M) {}
|
|
static bool classof(const InputFile *F) { return F->kind() == ObjectKind; }
|
|
void parse() override;
|
|
ArrayRef<Chunk *> getChunks() { return Chunks; }
|
|
ArrayRef<SymbolBody *> getSymbols() override { return SymbolBodies; }
|
|
|
|
// Returns the underying ELF file.
|
|
llvm::object::ELFFile<ELFT> *getObj() { return ELFObj.get(); }
|
|
|
|
private:
|
|
void initializeChunks();
|
|
void initializeSymbols();
|
|
|
|
SymbolBody *createSymbolBody(StringRef StringTable, const Elf_Sym *Sym);
|
|
|
|
std::unique_ptr<llvm::object::ELFFile<ELFT>> ELFObj;
|
|
llvm::BumpPtrAllocator Alloc;
|
|
|
|
// List of all chunks defined by this file. This includes both section
|
|
// chunks and non-section chunks for common symbols.
|
|
std::vector<Chunk *> Chunks;
|
|
|
|
// List of all symbols referenced or defined by this file.
|
|
std::vector<SymbolBody *> SymbolBodies;
|
|
};
|
|
|
|
} // namespace elf2
|
|
} // namespace lld
|
|
|
|
#endif
|