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