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19ca2b0f9d
This creates a new library called BinaryFormat that has all of the headers from llvm/Support containing structure and layout definitions for various types of binary formats like dwarf, coff, elf, etc as well as the code for identifying a file from its magic. Differential Revision: https://reviews.llvm.org/D33843 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304864 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
//===- Binary.cpp - A generic binary file ---------------------------------===//
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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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// This file defines the Binary class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/Binary.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/Magic.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/Error.h"
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#include "llvm/Object/MachOUniversal.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Object/WindowsResource.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ErrorOr.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <algorithm>
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#include <memory>
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#include <system_error>
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using namespace llvm;
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using namespace object;
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Binary::~Binary() = default;
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Binary::Binary(unsigned int Type, MemoryBufferRef Source)
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: TypeID(Type), Data(Source) {}
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StringRef Binary::getData() const { return Data.getBuffer(); }
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StringRef Binary::getFileName() const { return Data.getBufferIdentifier(); }
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MemoryBufferRef Binary::getMemoryBufferRef() const { return Data; }
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Expected<std::unique_ptr<Binary>> object::createBinary(MemoryBufferRef Buffer,
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LLVMContext *Context) {
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file_magic Type = identify_magic(Buffer.getBuffer());
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switch (Type) {
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case file_magic::archive:
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return Archive::create(Buffer);
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case file_magic::elf:
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case file_magic::elf_relocatable:
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case file_magic::elf_executable:
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case file_magic::elf_shared_object:
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case file_magic::elf_core:
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case file_magic::macho_object:
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case file_magic::macho_executable:
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case file_magic::macho_fixed_virtual_memory_shared_lib:
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case file_magic::macho_core:
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case file_magic::macho_preload_executable:
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case file_magic::macho_dynamically_linked_shared_lib:
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case file_magic::macho_dynamic_linker:
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case file_magic::macho_bundle:
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case file_magic::macho_dynamically_linked_shared_lib_stub:
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case file_magic::macho_dsym_companion:
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case file_magic::macho_kext_bundle:
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case file_magic::coff_object:
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case file_magic::coff_import_library:
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case file_magic::pecoff_executable:
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case file_magic::bitcode:
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case file_magic::wasm_object:
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return ObjectFile::createSymbolicFile(Buffer, Type, Context);
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case file_magic::macho_universal_binary:
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return MachOUniversalBinary::create(Buffer);
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case file_magic::windows_resource:
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return WindowsResource::createWindowsResource(Buffer);
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case file_magic::unknown:
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case file_magic::coff_cl_gl_object:
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// Unrecognized object file format.
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return errorCodeToError(object_error::invalid_file_type);
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}
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llvm_unreachable("Unexpected Binary File Type");
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}
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Expected<OwningBinary<Binary>> object::createBinary(StringRef Path) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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MemoryBuffer::getFileOrSTDIN(Path);
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if (std::error_code EC = FileOrErr.getError())
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return errorCodeToError(EC);
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std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
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Expected<std::unique_ptr<Binary>> BinOrErr =
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createBinary(Buffer->getMemBufferRef());
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if (!BinOrErr)
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return BinOrErr.takeError();
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std::unique_ptr<Binary> &Bin = BinOrErr.get();
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return OwningBinary<Binary>(std::move(Bin), std::move(Buffer));
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}
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