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//===- lib/ReaderWriter/ELF/ELFReader.h -----------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_READER_WRITER_ELF_READER_H
#define LLD_READER_WRITER_ELF_READER_H
#include "CreateELF.h"
#include "DynamicFile.h"
#include "ELFFile.h"
#include "lld/ReaderWriter/Reader.h"
namespace lld {
namespace elf {
struct DynamicFileCreateELFTraits {
typedef llvm::ErrorOr<std::unique_ptr<lld::SharedLibraryFile>> result_type;
template <class ELFT>
static result_type create(std::unique_ptr<llvm::MemoryBuffer> mb,
bool useUndefines) {
return lld::elf::DynamicFile<ELFT>::create(std::move(mb), useUndefines);
}
};
struct ELFFileCreateELFTraits {
typedef llvm::ErrorOr<std::unique_ptr<lld::File>> result_type;
template <class ELFT>
static result_type create(std::unique_ptr<llvm::MemoryBuffer> mb,
bool atomizeStrings) {
return lld::elf::ELFFile<ELFT>::create(std::move(mb), atomizeStrings);
}
};
class ELFObjectReader : public Reader {
public:
ELFObjectReader(bool atomizeStrings) : _atomizeStrings(atomizeStrings) {}
virtual bool canParse(file_magic magic, StringRef,
const MemoryBuffer &) const {
return (magic == llvm::sys::fs::file_magic::elf_relocatable);
}
virtual error_code
parseFile(std::unique_ptr<MemoryBuffer> &mb, const class Registry &,
std::vector<std::unique_ptr<File>> &result) const {
std::size_t maxAlignment =
1ULL << llvm::countTrailingZeros(uintptr_t(mb->getBufferStart()));
auto f = createELF<ELFFileCreateELFTraits>(
llvm::object::getElfArchType(&*mb), maxAlignment, std::move(mb),
_atomizeStrings);
if (error_code ec = f.getError())
return ec;
result.push_back(std::move(*f));
return error_code::success();
}
protected:
bool _atomizeStrings;
};
class ELFDSOReader : public Reader {
public:
ELFDSOReader(bool useUndefines) : _useUndefines(useUndefines) {}
virtual bool canParse(file_magic magic, StringRef,
const MemoryBuffer &) const {
return (magic == llvm::sys::fs::file_magic::elf_shared_object);
}
virtual error_code
parseFile(std::unique_ptr<MemoryBuffer> &mb, const class Registry &,
std::vector<std::unique_ptr<File>> &result) const {
std::size_t maxAlignment =
1ULL << llvm::countTrailingZeros(uintptr_t(mb->getBufferStart()));
auto f = createELF<DynamicFileCreateELFTraits>(
llvm::object::getElfArchType(&*mb), maxAlignment, std::move(mb),
_useUndefines);
if (error_code ec = f.getError())
return ec;
result.push_back(std::move(*f));
return error_code::success();
}
protected:
bool _useUndefines;
};
} // namespace elf
} // namespace lld
#endif // LLD_READER_WRITER_ELF_READER_H
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