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 2091bc56edSDimitry Andric ErrorOr<ObjectFile *> 2191bc56edSDimitry Andric ObjectFile::createELFObjectFile(std::unique_ptr<MemoryBuffer> &Obj) { 2291bc56edSDimitry Andric std::pair<unsigned char, unsigned char> Ident = 2391bc56edSDimitry Andric getElfArchType(Obj->getBuffer()); 24139f7f9bSDimitry Andric std::size_t MaxAlignment = 2591bc56edSDimitry Andric 1ULL << countTrailingZeros(uintptr_t(Obj->getBufferStart())); 26139f7f9bSDimitry Andric 2791bc56edSDimitry Andric std::error_code EC; 2891bc56edSDimitry Andric std::unique_ptr<ObjectFile> R; 292754fe60SDimitry Andric if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB) 30139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 31139f7f9bSDimitry Andric if (MaxAlignment >= 4) 3291bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 4, false>>( 3391bc56edSDimitry Andric std::move(Obj), EC)); 34139f7f9bSDimitry Andric else 35139f7f9bSDimitry Andric #endif 36139f7f9bSDimitry Andric if (MaxAlignment >= 2) 3791bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 2, false>>( 3891bc56edSDimitry Andric std::move(Obj), EC)); 39139f7f9bSDimitry Andric else 4091bc56edSDimitry Andric return object_error::parse_failed; 412754fe60SDimitry Andric else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB) 42139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 43139f7f9bSDimitry Andric if (MaxAlignment >= 4) 4491bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 4, false>>(std::move(Obj), 4591bc56edSDimitry Andric EC)); 46139f7f9bSDimitry Andric else 47139f7f9bSDimitry Andric #endif 48139f7f9bSDimitry Andric if (MaxAlignment >= 2) 4991bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 2, false>>(std::move(Obj), 5091bc56edSDimitry Andric EC)); 51139f7f9bSDimitry Andric else 5291bc56edSDimitry Andric return object_error::parse_failed; 532754fe60SDimitry Andric else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB) 54139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 55139f7f9bSDimitry Andric if (MaxAlignment >= 8) 5691bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 8, true>>(std::move(Obj), 5791bc56edSDimitry Andric EC)); 58139f7f9bSDimitry Andric else 59139f7f9bSDimitry Andric #endif 60139f7f9bSDimitry Andric if (MaxAlignment >= 2) 6191bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::big, 2, true>>(std::move(Obj), 6291bc56edSDimitry Andric EC)); 63139f7f9bSDimitry Andric else 6491bc56edSDimitry Andric return object_error::parse_failed; 65dff0c46cSDimitry Andric else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) { 66139f7f9bSDimitry Andric #if !LLVM_IS_UNALIGNED_ACCESS_FAST 67139f7f9bSDimitry Andric if (MaxAlignment >= 8) 6891bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 8, true>>( 6991bc56edSDimitry Andric std::move(Obj), EC)); 70139f7f9bSDimitry Andric else 71139f7f9bSDimitry Andric #endif 72139f7f9bSDimitry Andric if (MaxAlignment >= 2) 7391bc56edSDimitry Andric R.reset(new ELFObjectFile<ELFType<support::little, 2, true>>( 7491bc56edSDimitry Andric std::move(Obj), EC)); 75139f7f9bSDimitry Andric else 7691bc56edSDimitry Andric return object_error::parse_failed; 77dff0c46cSDimitry Andric } 7891bc56edSDimitry Andric else 7991bc56edSDimitry Andric llvm_unreachable("Buffer is not an ELF object file!"); 80dff0c46cSDimitry Andric 8191bc56edSDimitry Andric if (EC) 8291bc56edSDimitry Andric return EC; 8391bc56edSDimitry Andric return R.release(); 842754fe60SDimitry Andric } 852754fe60SDimitry Andric 862754fe60SDimitry Andric } // end namespace llvm 87