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https://github.com/c64scene-ar/llvm-6502.git
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7f2f94faeb
This makes llvm-nm ignore members that are not sufficiently aligned for lib/Object to handle. These archives are invalid. GNU AR is able to handle this, but in general just warns about broken archive members. We should probably start warning too, but for now just make sure llvm-nm exits with an 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211036 91177308-0d34-0410-b5e6-96231b3b80d8
86 lines
3.0 KiB
C++
86 lines
3.0 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/ELFObjectFile.h"
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#include "llvm/Support/MathExtras.h"
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namespace llvm {
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using namespace object;
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ErrorOr<ObjectFile *> ObjectFile::createELFObjectFile(MemoryBuffer *Obj,
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bool BufferOwned) {
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std::pair<unsigned char, unsigned char> Ident = getElfArchType(Obj);
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std::size_t MaxAlignment =
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1ULL << countTrailingZeros(uintptr_t(Obj->getBufferStart()));
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std::error_code EC;
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std::unique_ptr<ObjectFile> R;
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if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
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#if !LLVM_IS_UNALIGNED_ACCESS_FAST
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if (MaxAlignment >= 4)
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R.reset(new ELFObjectFile<ELFType<support::little, 4, false> >(
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Obj, EC, BufferOwned));
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else
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#endif
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if (MaxAlignment >= 2)
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R.reset(new ELFObjectFile<ELFType<support::little, 2, false> >(
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Obj, EC, BufferOwned));
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else
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return object_error::parse_failed;
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else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
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#if !LLVM_IS_UNALIGNED_ACCESS_FAST
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if (MaxAlignment >= 4)
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R.reset(new ELFObjectFile<ELFType<support::big, 4, false> >(Obj, EC,
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BufferOwned));
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else
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#endif
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if (MaxAlignment >= 2)
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R.reset(new ELFObjectFile<ELFType<support::big, 2, false> >(Obj, EC,
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BufferOwned));
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else
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return object_error::parse_failed;
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else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
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#if !LLVM_IS_UNALIGNED_ACCESS_FAST
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if (MaxAlignment >= 8)
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R.reset(new ELFObjectFile<ELFType<support::big, 8, true> >(Obj, EC,
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BufferOwned));
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else
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#endif
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if (MaxAlignment >= 2)
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R.reset(new ELFObjectFile<ELFType<support::big, 2, true> >(Obj, EC,
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BufferOwned));
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else
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return object_error::parse_failed;
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else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
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#if !LLVM_IS_UNALIGNED_ACCESS_FAST
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if (MaxAlignment >= 8)
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R.reset(new ELFObjectFile<ELFType<support::little, 8, true> >(
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Obj, EC, BufferOwned));
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else
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#endif
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if (MaxAlignment >= 2)
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R.reset(new ELFObjectFile<ELFType<support::little, 2, true> >(
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Obj, EC, BufferOwned));
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else
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return object_error::parse_failed;
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}
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else
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llvm_unreachable("Buffer is not an ELF object file!");
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if (EC)
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return EC;
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return R.release();
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}
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} // end namespace llvm
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