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/FileSystem.h"
  18 #include "llvm/Support/Path.h"
  19
  20 // Include headers for createBinary.
  21 #include "llvm/Object/Archive.h"
  22 #include "llvm/Object/COFF.h"
  23 #include "llvm/Object/MachOUniversal.h"
  24 #include "llvm/Object/ObjectFile.h"
  25
  26 using namespace llvm;
  27 using namespace object;
  28
  29 Binary::~Binary() {
  30   delete Data;
  31 }
  32
  33 Binary::Binary(unsigned int Type, MemoryBuffer *Source)
  34   : TypeID(Type)
  35   , Data(Source) {}
  36
  37 StringRef Binary::getData() const {
  38   return Data->getBuffer();
  39 }
  40
  41 StringRef Binary::getFileName() const {
  42   return Data->getBufferIdentifier();
  43 }
  44
  45 error_code object::createBinary(MemoryBuffer *Source,
  46                                 OwningPtr<Binary> &Result) {
  47   OwningPtr<MemoryBuffer> scopedSource(Source);
  48   if (!Source)
  49     return make_error_code(errc::invalid_argument);
  50   sys::fs::file_magic type = sys::fs::identify_magic(Source->getBuffer());
  51   error_code ec;
  52   switch (type) {
  53     case sys::fs::file_magic::archive: {
  54       OwningPtr<Binary> ret(new Archive(scopedSource.take(), ec));
  55       if (ec) return ec;
  56       Result.swap(ret);
  57       return object_error::success;
  58     }
  59     case sys::fs::file_magic::elf_relocatable:
  60     case sys::fs::file_magic::elf_executable:
  61     case sys::fs::file_magic::elf_shared_object:
  62     case sys::fs::file_magic::elf_core: {
  63       OwningPtr<Binary> ret(
  64         ObjectFile::createELFObjectFile(scopedSource.take()));
  65       if (!ret)
  66         return object_error::invalid_file_type;
  67       Result.swap(ret);
  68       return object_error::success;
  69     }
  70     case sys::fs::file_magic::macho_object:
  71     case sys::fs::file_magic::macho_executable:
  72     case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
  73     case sys::fs::file_magic::macho_core:
  74     case sys::fs::file_magic::macho_preload_executable:
  75     case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
  76     case sys::fs::file_magic::macho_dynamic_linker:
  77     case sys::fs::file_magic::macho_bundle:
  78     case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
  79     case sys::fs::file_magic::macho_dsym_companion: {
  80       OwningPtr<Binary> ret(
  81         ObjectFile::createMachOObjectFile(scopedSource.take()));
  82       if (!ret)
  83         return object_error::invalid_file_type;
  84       Result.swap(ret);
  85       return object_error::success;
  86     }
  87     case sys::fs::file_magic::macho_universal_binary: {
  88       OwningPtr<Binary> ret(new MachOUniversalBinary(scopedSource.take(), ec));
  89       if (ec) return ec;
  90       Result.swap(ret);
  91       return object_error::success;
  92     }
  93     case sys::fs::file_magic::coff_object:
  94     case sys::fs::file_magic::coff_import_library:
  95     case sys::fs::file_magic::pecoff_executable: {
  96       OwningPtr<Binary> ret(
  97           ObjectFile::createCOFFObjectFile(scopedSource.take()));
  98       if (!ret)
  99         return object_error::invalid_file_type;
 100       Result.swap(ret);
 101       return object_error::success;
 102     }
 103     case sys::fs::file_magic::unknown:
 104     case sys::fs::file_magic::bitcode:
 105     case sys::fs::file_magic::windows_resource: {
 106       // Unrecognized object file format.
 107       return object_error::invalid_file_type;
 108     }
 109   }
 110   llvm_unreachable("Unexpected Binary File Type");
 111 }
 112
 113 error_code object::createBinary(StringRef Path, OwningPtr<Binary> &Result) {
 114   OwningPtr<MemoryBuffer> File;
 115   if (error_code ec = MemoryBuffer::getFileOrSTDIN(Path, File))
 116     return ec;
 117   return createBinary(File.take(), Result);
 118 }