forked from OSchip/llvm-project
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
//===- lib/ReaderWriter/ELF/ELFReader.h -----------------------------------===//
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//
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// The LLVM Linker
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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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#ifndef LLD_READER_WRITER_ELF_READER_H
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#define LLD_READER_WRITER_ELF_READER_H
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#include "CreateELF.h"
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#include "DynamicFile.h"
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#include "ELFFile.h"
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#include "lld/ReaderWriter/Reader.h"
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namespace lld {
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namespace elf {
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struct DynamicFileCreateELFTraits {
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typedef llvm::ErrorOr<std::unique_ptr<lld::SharedLibraryFile>> result_type;
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template <class ELFT>
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static result_type create(std::unique_ptr<llvm::MemoryBuffer> mb,
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bool useUndefines) {
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return lld::elf::DynamicFile<ELFT>::create(std::move(mb), useUndefines);
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}
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};
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struct ELFFileCreateELFTraits {
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typedef llvm::ErrorOr<std::unique_ptr<lld::File>> result_type;
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template <class ELFT>
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static result_type create(std::unique_ptr<llvm::MemoryBuffer> mb,
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bool atomizeStrings) {
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return lld::elf::ELFFile<ELFT>::create(std::move(mb), atomizeStrings);
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}
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};
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class ELFObjectReader : public Reader {
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public:
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ELFObjectReader(bool atomizeStrings) : _atomizeStrings(atomizeStrings) {}
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bool canParse(file_magic magic, StringRef,
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const MemoryBuffer &) const override {
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return (magic == llvm::sys::fs::file_magic::elf_relocatable);
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}
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error_code
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parseFile(std::unique_ptr<MemoryBuffer> &mb, const class Registry &,
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std::vector<std::unique_ptr<File>> &result) const override {
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std::size_t maxAlignment =
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1ULL << llvm::countTrailingZeros(uintptr_t(mb->getBufferStart()));
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auto f = createELF<ELFFileCreateELFTraits>(
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llvm::object::getElfArchType(&*mb), maxAlignment, std::move(mb),
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_atomizeStrings);
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if (error_code ec = f.getError())
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return ec;
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result.push_back(std::move(*f));
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return error_code::success();
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}
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protected:
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bool _atomizeStrings;
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};
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class ELFDSOReader : public Reader {
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public:
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ELFDSOReader(bool useUndefines) : _useUndefines(useUndefines) {}
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bool canParse(file_magic magic, StringRef,
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const MemoryBuffer &) const override {
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return (magic == llvm::sys::fs::file_magic::elf_shared_object);
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}
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error_code
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parseFile(std::unique_ptr<MemoryBuffer> &mb, const class Registry &,
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std::vector<std::unique_ptr<File>> &result) const override {
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std::size_t maxAlignment =
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1ULL << llvm::countTrailingZeros(uintptr_t(mb->getBufferStart()));
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auto f = createELF<DynamicFileCreateELFTraits>(
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llvm::object::getElfArchType(&*mb), maxAlignment, std::move(mb),
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_useUndefines);
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if (error_code ec = f.getError())
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return ec;
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result.push_back(std::move(*f));
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return error_code::success();
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}
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protected:
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bool _useUndefines;
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};
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} // namespace elf
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} // namespace lld
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#endif // LLD_READER_WRITER_ELF_READER_H
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