12754fe60SDimitry Andric //===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===// 22754fe60SDimitry Andric // 32754fe60SDimitry Andric // The LLVM Compiler Infrastructure 42754fe60SDimitry Andric // 52754fe60SDimitry Andric // This file is distributed under the University of Illinois Open Source 62754fe60SDimitry Andric // License. See LICENSE.TXT for details. 72754fe60SDimitry Andric // 82754fe60SDimitry Andric //===----------------------------------------------------------------------===// 92754fe60SDimitry Andric // 10dff0c46cSDimitry Andric // Part of the ELFObjectFile class implementation. 112754fe60SDimitry Andric // 122754fe60SDimitry Andric //===----------------------------------------------------------------------===// 132754fe60SDimitry Andric 14f785676fSDimitry Andric #include "llvm/Object/ELFObjectFile.h" 15139f7f9bSDimitry Andric #include "llvm/Support/MathExtras.h" 162754fe60SDimitry Andric 17dff0c46cSDimitry Andric namespace llvm { 182754fe60SDimitry Andric using namespace object; 192754fe60SDimitry Andric 2039d628a0SDimitry Andric ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source) 2139d628a0SDimitry Andric : ObjectFile(Type, Source) {} 2239d628a0SDimitry Andric 2339d628a0SDimitry Andric ErrorOr<std::unique_ptr<ObjectFile>> 2439d628a0SDimitry Andric ObjectFile::createELFObjectFile(MemoryBufferRef Obj) { 2591bc56edSDimitry Andric std::pair<unsigned char, unsigned char> Ident = 2639d628a0SDimitry Andric getElfArchType(Obj.getBuffer()); 27139f7f9bSDimitry Andric std::size_t MaxAlignment = 2839d628a0SDimitry Andric 1ULL << countTrailingZeros(uintptr_t(Obj.getBufferStart())); 29139f7f9bSDimitry Andric 3091bc56edSDimitry Andric std::error_code EC; 3191bc56edSDimitry Andric std::unique_ptr<ObjectFile> R; 322754fe60SDimitry Andric if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB) 33139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 34139f7f9bSDimitry Andric if (MaxAlignment >= 4) 3539d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 4, false>>(Obj, EC)); 36139f7f9bSDimitry Andric else 37139f7f9bSDimitry Andric #endif 38139f7f9bSDimitry Andric if (MaxAlignment >= 2) 3939d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 2, false>>(Obj, EC)); 40139f7f9bSDimitry Andric else 4191bc56edSDimitry Andric return object_error::parse_failed; 422754fe60SDimitry Andric else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB) 43139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 44139f7f9bSDimitry Andric if (MaxAlignment >= 4) 4539d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 4, false>>(Obj, EC)); 46139f7f9bSDimitry Andric else 47139f7f9bSDimitry Andric #endif 48139f7f9bSDimitry Andric if (MaxAlignment >= 2) 4939d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 2, false>>(Obj, EC)); 50139f7f9bSDimitry Andric else 5191bc56edSDimitry Andric return object_error::parse_failed; 522754fe60SDimitry Andric else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB) 53139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 54139f7f9bSDimitry Andric if (MaxAlignment >= 8) 5539d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 8, true>>(Obj, EC)); 56139f7f9bSDimitry Andric else 57139f7f9bSDimitry Andric #endif 58139f7f9bSDimitry Andric if (MaxAlignment >= 2) 5939d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 2, true>>(Obj, EC)); 60139f7f9bSDimitry Andric else 6191bc56edSDimitry Andric return object_error::parse_failed; 62dff0c46cSDimitry Andric else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) { 63139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 64139f7f9bSDimitry Andric if (MaxAlignment >= 8) 6539d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 8, true>>(Obj, EC)); 66139f7f9bSDimitry Andric else 67139f7f9bSDimitry Andric #endif 68139f7f9bSDimitry Andric if (MaxAlignment >= 2) 6939d628a0SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 2, true>>(Obj, EC)); 70139f7f9bSDimitry Andric else 7191bc56edSDimitry Andric return object_error::parse_failed; 72dff0c46cSDimitry Andric } 7391bc56edSDimitry Andric else 7491bc56edSDimitry Andric llvm_unreachable("Buffer is not an ELF object file!"); 75dff0c46cSDimitry Andric 7691bc56edSDimitry Andric if (EC) 7791bc56edSDimitry Andric return EC; 7839d628a0SDimitry Andric return std::move(R); 792754fe60SDimitry Andric } 802754fe60SDimitry Andric 812754fe60SDimitry Andric } // end namespace llvm 82