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 3097bc6c73SDimitry Andric if (MaxAlignment < 2) 3197bc6c73SDimitry Andric return object_error::parse_failed; 3297bc6c73SDimitry Andric 3391bc56edSDimitry Andric std::error_code EC; 3491bc56edSDimitry Andric std::unique_ptr<ObjectFile> R; 3597bc6c73SDimitry Andric if (Ident.first == ELF::ELFCLASS32) { 3697bc6c73SDimitry Andric if (Ident.second == ELF::ELFDATA2LSB) 3797bc6c73SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, false>>(Obj, EC)); 3897bc6c73SDimitry Andric else if (Ident.second == ELF::ELFDATA2MSB) 3997bc6c73SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, false>>(Obj, EC)); 40139f7f9bSDimitry Andric else 4191bc56edSDimitry Andric return object_error::parse_failed; 4297bc6c73SDimitry Andric } else if (Ident.first == ELF::ELFCLASS64) { 4397bc6c73SDimitry Andric if (Ident.second == ELF::ELFDATA2LSB) 4497bc6c73SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, true>>(Obj, EC)); 4597bc6c73SDimitry Andric else if (Ident.second == ELF::ELFDATA2MSB) 4697bc6c73SDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, true>>(Obj, EC)); 47139f7f9bSDimitry Andric else 4891bc56edSDimitry Andric return object_error::parse_failed; 4997bc6c73SDimitry Andric } else { 5091bc56edSDimitry Andric return object_error::parse_failed; 51dff0c46cSDimitry Andric } 52dff0c46cSDimitry Andric 5391bc56edSDimitry Andric if (EC) 5491bc56edSDimitry Andric return EC; 5539d628a0SDimitry Andric return std::move(R); 562754fe60SDimitry Andric } 572754fe60SDimitry Andric 582754fe60SDimitry Andric } // end namespace llvm 59