lib/Object/Binary.cpp

   1 //===- Binary.cpp - A generic binary 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 the Binary class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Object/Binary.h"
  15 #include "llvm/ADT/StringRef.h"
  16 #include "llvm/Support/MemoryBuffer.h"
  17 #include "llvm/Support/Path.h"
  18
  19 // Include headers for createBinary.
  20 #include "llvm/Object/ObjectFile.h"
  21 #include "llvm/Object/COFF.h"
  22
  23 using namespace llvm;
  24 using namespace object;
  25
  26 Binary::~Binary() {
  27   delete Data;
  28 }
  29
  30 Binary::Binary(unsigned int Type, MemoryBuffer *Source)
  31   : TypeID(Type)
  32   , Data(Source) {}
  33
  34 StringRef Binary::getData() const {
  35   return Data->getBuffer();
  36 }
  37
  38 StringRef Binary::getFileName() const {
  39   return Data->getBufferIdentifier();
  40 }
  41
  42 error_code object::createBinary(MemoryBuffer *Source,
  43                                 OwningPtr<Binary> &Result) {
  44   OwningPtr<MemoryBuffer> scopedSource(Source);
  45   if (!Source)
  46     return make_error_code(errc::invalid_argument);
  47   if (Source->getBufferSize() < 64)
  48     return object_error::invalid_file_type;
  49   sys::LLVMFileType type = sys::IdentifyFileType(Source->getBufferStart(),
  50                                 static_cast<unsigned>(Source->getBufferSize()));
  51   error_code ec;
  52   switch (type) {
  53     case sys::ELF_Relocatable_FileType:
  54     case sys::ELF_Executable_FileType:
  55     case sys::ELF_SharedObject_FileType:
  56     case sys::ELF_Core_FileType: {
  57       OwningPtr<Binary> ret(
  58         ObjectFile::createELFObjectFile(scopedSource.take()));
  59       if (!ret)
  60         return object_error::invalid_file_type;
  61       Result.swap(ret);
  62       return object_error::success;
  63     }
  64     case sys::Mach_O_Object_FileType:
  65     case sys::Mach_O_Executable_FileType:
  66     case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
  67     case sys::Mach_O_Core_FileType:
  68     case sys::Mach_O_PreloadExecutable_FileType:
  69     case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
  70     case sys::Mach_O_DynamicLinker_FileType:
  71     case sys::Mach_O_Bundle_FileType:
  72     case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType: {
  73       OwningPtr<Binary> ret(
  74         ObjectFile::createMachOObjectFile(scopedSource.take()));
  75       if (!ret)
  76         return object_error::invalid_file_type;
  77       Result.swap(ret);
  78       return object_error::success;
  79     }
  80     case sys::COFF_FileType: {
  81       OwningPtr<Binary> ret(new COFFObjectFile(scopedSource.take(), ec));
  82       if (ec) return ec;
  83       Result.swap(ret);
  84       return object_error::success;
  85     }
  86     default: // Unrecognized object file format.
  87       return object_error::invalid_file_type;
  88   }
  89 }
  90
  91 error_code object::createBinary(StringRef Path, OwningPtr<Binary> &Result) {
  92   OwningPtr<MemoryBuffer> File;
  93   if (error_code ec = MemoryBuffer::getFile(Path, File))
  94     return ec;
  95   return createBinary(File.take(), Result);
  96 }