DirectXShaderCompiler/lib/Object/ELFObjectFile.cpp at main · microsoft/DirectXShaderCompiler · GitHub

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//===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===//

// The LLVM Compiler Infrastructure

// This file is distributed under the University of Illinois Open Source

// License. See LICENSE.TXT for details.

//===----------------------------------------------------------------------===//

// Part of the ELFObjectFile class implementation.

//===----------------------------------------------------------------------===//

#include "llvm/Object/ELFObjectFile.h"

#include "llvm/Support/MathExtras.h"

namespace llvm {

using namespace object;

ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source)

: ObjectFile(Type, Source) {}

ErrorOr<std::unique_ptr<ObjectFile>>

ObjectFile::createELFObjectFile(MemoryBufferRef Obj) {

std::pair<unsigned char, unsigned char> Ident =

getElfArchType(Obj.getBuffer());

std::size_t MaxAlignment =

1ULL << countTrailingZeros(uintptr_t(Obj.getBufferStart()));

if (MaxAlignment < 2)

return object_error::parse_failed;

std::error_code EC;

std::unique_ptr<ObjectFile> R;

if (Ident.first == ELF::ELFCLASS32) {

if (Ident.second == ELF::ELFDATA2LSB)

R.reset(new ELFObjectFile<ELFType<support::little, false>>(Obj, EC));

else if (Ident.second == ELF::ELFDATA2MSB)

R.reset(new ELFObjectFile<ELFType<support::big, false>>(Obj, EC));

else

return object_error::parse_failed;

} else if (Ident.first == ELF::ELFCLASS64) {

if (Ident.second == ELF::ELFDATA2LSB)

R.reset(new ELFObjectFile<ELFType<support::little, true>>(Obj, EC));

else if (Ident.second == ELF::ELFDATA2MSB)

R.reset(new ELFObjectFile<ELFType<support::big, true>>(Obj, EC));

else

return object_error::parse_failed;

} else {

return object_error::parse_failed;

}

if (EC)

return EC;

return std::move(R);

}

} // end namespace llvm

DirectXShaderCompiler/lib/Object/ELFObjectFile.cpp at main · microsoft/DirectXShaderCompiler · GitHub

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