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72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
//===- ObjectFile.cpp - File format independent object file -----*- 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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// This file defines a file format independent ObjectFile class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/system_error.h"
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using namespace llvm;
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using namespace object;
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ObjectFile::ObjectFile(MemoryBuffer *Object)
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: MapFile(Object) {
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assert(MapFile && "Must be a valid MemoryBuffer!");
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base = reinterpret_cast<const uint8_t *>(MapFile->getBufferStart());
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}
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ObjectFile::~ObjectFile() {
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delete MapFile;
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}
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StringRef ObjectFile::getFilename() const {
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return MapFile->getBufferIdentifier();
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}
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ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) {
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if (!Object || Object->getBufferSize() < 64)
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return 0;
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sys::LLVMFileType type = sys::IdentifyFileType(Object->getBufferStart(),
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static_cast<unsigned>(Object->getBufferSize()));
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switch (type) {
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case sys::ELF_Relocatable_FileType:
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case sys::ELF_Executable_FileType:
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case sys::ELF_SharedObject_FileType:
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case sys::ELF_Core_FileType:
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return createELFObjectFile(Object);
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case sys::Mach_O_Object_FileType:
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case sys::Mach_O_Executable_FileType:
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case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
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case sys::Mach_O_Core_FileType:
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case sys::Mach_O_PreloadExecutable_FileType:
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case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
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case sys::Mach_O_DynamicLinker_FileType:
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case sys::Mach_O_Bundle_FileType:
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case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
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return createMachOObjectFile(Object);
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case sys::COFF_FileType:
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return createCOFFObjectFile(Object);
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default:
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llvm_unreachable("Unknown Object File Type");
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}
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}
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ObjectFile *ObjectFile::createObjectFile(StringRef ObjectPath) {
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OwningPtr<MemoryBuffer> File;
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if (error_code ec = MemoryBuffer::getFile(ObjectPath, File))
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return NULL;
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return createObjectFile(File.take());
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}
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