1 //===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines a file format independent ObjectFile class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/Object/ObjectFile.h" 15 #include "llvm/Support/ErrorHandling.h" 16 #include "llvm/Support/MemoryBuffer.h" 17 18 namespace llvm { 19 namespace object { 20 21 ObjectFile::ObjectFile(MemoryBuffer *Object) 22 : MapFile(Object) { 23 assert(MapFile && "Must be a valid MemoryBuffer!"); 24 base = reinterpret_cast<const uint8_t *>(MapFile->getBufferStart()); 25 } 26 27 ObjectFile::~ObjectFile() { 28 delete MapFile; 29 } 30 31 StringRef ObjectFile::getFilename() const { 32 return MapFile->getBufferIdentifier(); 33 } 34 35 ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) { 36 if (!Object || Object->getBufferSize() < 64) 37 return 0; 38 sys::LLVMFileType type = sys::IdentifyFileType(Object->getBufferStart(), 39 static_cast<unsigned>(Object->getBufferSize())); 40 switch (type) { 41 case sys::ELF_Relocatable_FileType: 42 case sys::ELF_Executable_FileType: 43 case sys::ELF_SharedObject_FileType: 44 case sys::ELF_Core_FileType: 45 return 0; 46 case sys::Mach_O_Object_FileType: 47 case sys::Mach_O_Executable_FileType: 48 case sys::Mach_O_FixedVirtualMemorySharedLib_FileType: 49 case sys::Mach_O_Core_FileType: 50 case sys::Mach_O_PreloadExectuable_FileType: 51 case sys::Mach_O_DynamicallyLinkedSharedLib_FileType: 52 case sys::Mach_O_DynamicLinker_FileType: 53 case sys::Mach_O_Bundle_FileType: 54 case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType: 55 return 0; 56 case sys::COFF_FileType: 57 return 0; 58 default: 59 llvm_unreachable("Unknown Object File Type"); 60 } 61 } 62 63 ObjectFile *ObjectFile::createObjectFile(const sys::Path &ObjectPath) { 64 return createObjectFile(MemoryBuffer::getFile(ObjectPath.c_str())); 65 } 66 67 } // end namespace object 68 } // end namespace llvm 69