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/MachOUniversal.h"
  23 #include "llvm/Object/ObjectFile.h"
  24
  25 using namespace llvm;
  26 using namespace object;
  27
  28 Binary::~Binary() {}
  29
  30 Binary::Binary(unsigned int Type, MemoryBufferRef Source)
  31     : TypeID(Type), Data(Source) {}
  32
  33 StringRef Binary::getData() const { return Data.getBuffer(); }
  34
  35 StringRef Binary::getFileName() const { return Data.getBufferIdentifier(); }
  36
  37 MemoryBufferRef Binary::getMemoryBufferRef() const { return Data; }
  38
  39 ErrorOr<std::unique_ptr<Binary>> object::createBinary(MemoryBufferRef Buffer,
  40                                                       LLVMContext *Context) {
  41   sys::fs::file_magic Type = sys::fs::identify_magic(Buffer.getBuffer());
  42
  43   switch (Type) {
  44     case sys::fs::file_magic::archive:
  45       return Archive::create(Buffer);
  46     case sys::fs::file_magic::elf_relocatable:
  47     case sys::fs::file_magic::elf_executable:
  48     case sys::fs::file_magic::elf_shared_object:
  49     case sys::fs::file_magic::elf_core:
  50     case sys::fs::file_magic::macho_object:
  51     case sys::fs::file_magic::macho_executable:
  52     case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
  53     case sys::fs::file_magic::macho_core:
  54     case sys::fs::file_magic::macho_preload_executable:
  55     case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
  56     case sys::fs::file_magic::macho_dynamic_linker:
  57     case sys::fs::file_magic::macho_bundle:
  58     case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
  59     case sys::fs::file_magic::macho_dsym_companion:
  60     case sys::fs::file_magic::coff_object:
  61     case sys::fs::file_magic::coff_import_library:
  62     case sys::fs::file_magic::pecoff_executable:
  63     case sys::fs::file_magic::bitcode:
  64       return ObjectFile::createSymbolicFile(Buffer, Type, Context);
  65     case sys::fs::file_magic::macho_universal_binary:
  66       return MachOUniversalBinary::create(Buffer);
  67     case sys::fs::file_magic::unknown:
  68     case sys::fs::file_magic::windows_resource:
  69       // Unrecognized object file format.
  70       return object_error::invalid_file_type;
  71   }
  72   llvm_unreachable("Unexpected Binary File Type");
  73 }
  74
  75 ErrorOr<OwningBinary<Binary>> object::createBinary(StringRef Path) {
  76   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
  77       MemoryBuffer::getFileOrSTDIN(Path);
  78   if (std::error_code EC = FileOrErr.getError())
  79     return EC;
  80   std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
  81
  82   ErrorOr<std::unique_ptr<Binary>> BinOrErr =
  83       createBinary(Buffer->getMemBufferRef());
  84   if (std::error_code EC = BinOrErr.getError())
  85     return EC;
  86   std::unique_ptr<Binary> &Bin = BinOrErr.get();
  87
  88   return OwningBinary<Binary>(std::move(Bin), std::move(Buffer));
  89 }