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/FileSystem.h"
  17 #include "llvm/Support/MemoryBuffer.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 ErrorOr<Binary *> object::createBinary(MemoryBuffer *Source) {
  46   OwningPtr<MemoryBuffer> scopedSource(Source);
  47   sys::fs::file_magic type = sys::fs::identify_magic(Source->getBuffer());
  48   error_code EC;
  49   switch (type) {
  50     case sys::fs::file_magic::archive: {
  51       OwningPtr<Binary> Ret(new Archive(scopedSource.take(), EC));
  52       if (EC)
  53         return EC;
  54       return Ret.take();
  55     }
  56     case sys::fs::file_magic::elf_relocatable:
  57     case sys::fs::file_magic::elf_executable:
  58     case sys::fs::file_magic::elf_shared_object:
  59     case sys::fs::file_magic::elf_core: {
  60       OwningPtr<Binary> Ret(
  61           ObjectFile::createELFObjectFile(scopedSource.take()));
  62       if (!Ret)
  63         return object_error::invalid_file_type;
  64       return Ret.take();
  65     }
  66     case sys::fs::file_magic::macho_object:
  67     case sys::fs::file_magic::macho_executable:
  68     case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
  69     case sys::fs::file_magic::macho_core:
  70     case sys::fs::file_magic::macho_preload_executable:
  71     case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
  72     case sys::fs::file_magic::macho_dynamic_linker:
  73     case sys::fs::file_magic::macho_bundle:
  74     case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
  75     case sys::fs::file_magic::macho_dsym_companion: {
  76       OwningPtr<Binary> Ret(
  77           ObjectFile::createMachOObjectFile(scopedSource.take()));
  78       if (!Ret)
  79         return object_error::invalid_file_type;
  80       return Ret.take();
  81     }
  82     case sys::fs::file_magic::macho_universal_binary: {
  83       OwningPtr<Binary> Ret(new MachOUniversalBinary(scopedSource.take(), EC));
  84       if (EC)
  85         return EC;
  86       return Ret.take();
  87     }
  88     case sys::fs::file_magic::coff_object:
  89     case sys::fs::file_magic::coff_import_library:
  90     case sys::fs::file_magic::pecoff_executable: {
  91       OwningPtr<Binary> Ret(
  92           ObjectFile::createCOFFObjectFile(scopedSource.take()));
  93       if (!Ret)
  94         return object_error::invalid_file_type;
  95       return Ret.take();
  96     }
  97     case sys::fs::file_magic::unknown:
  98     case sys::fs::file_magic::bitcode:
  99     case sys::fs::file_magic::windows_resource: {
 100       // Unrecognized object file format.
 101       return object_error::invalid_file_type;
 102     }
 103   }
 104   llvm_unreachable("Unexpected Binary File Type");
 105 }
 106
 107 ErrorOr<Binary *> object::createBinary(StringRef Path) {
 108   OwningPtr<MemoryBuffer> File;
 109   if (error_code EC = MemoryBuffer::getFileOrSTDIN(Path, File))
 110     return EC;
 111   return createBinary(File.take());
 112 }