51 lines
1.9 KiB
C++
51 lines
1.9 KiB
C++
//===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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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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//
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// Part of the ELFObjectFile class implementation.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/ELF.h"
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namespace llvm {
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using namespace object;
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namespace {
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std::pair<unsigned char, unsigned char>
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getElfArchType(MemoryBuffer *Object) {
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if (Object->getBufferSize() < ELF::EI_NIDENT)
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return std::make_pair((uint8_t)ELF::ELFCLASSNONE,(uint8_t)ELF::ELFDATANONE);
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return std::make_pair( (uint8_t)Object->getBufferStart()[ELF::EI_CLASS]
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, (uint8_t)Object->getBufferStart()[ELF::EI_DATA]);
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}
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}
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// Creates an in-memory object-file by default: createELFObjectFile(Buffer)
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ObjectFile *ObjectFile::createELFObjectFile(MemoryBuffer *Object) {
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std::pair<unsigned char, unsigned char> Ident = getElfArchType(Object);
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error_code ec;
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if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
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return new ELFObjectFile<support::little, false>(Object, ec);
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else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
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return new ELFObjectFile<support::big, false>(Object, ec);
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else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
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return new ELFObjectFile<support::big, true>(Object, ec);
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else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
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ELFObjectFile<support::little, true> *result =
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new ELFObjectFile<support::little, true>(Object, ec);
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return result;
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}
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report_fatal_error("Buffer is not an ELF object file!");
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}
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} // end namespace llvm
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