contrib/llvm/lib/Object/Binary.cpp

   1 //===- Binary.cpp - A generic binary file ---------------------------------===//
   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/BinaryFormat/Magic.h"
  17 #include "llvm/Object/Archive.h"
  18 #include "llvm/Object/Error.h"
  19 #include "llvm/Object/MachOUniversal.h"
  20 #include "llvm/Object/ObjectFile.h"
  21 #include "llvm/Object/WindowsResource.h"
  22 #include "llvm/Support/Error.h"
  23 #include "llvm/Support/ErrorHandling.h"
  24 #include "llvm/Support/ErrorOr.h"
  25 #include "llvm/Support/FileSystem.h"
  26 #include "llvm/Support/MemoryBuffer.h"
  27 #include <algorithm>
  28 #include <memory>
  29 #include <system_error>
  30
  31 using namespace llvm;
  32 using namespace object;
  33
  34 Binary::~Binary() = default;
  35
  36 Binary::Binary(unsigned int Type, MemoryBufferRef Source)
  37     : TypeID(Type), Data(Source) {}
  38
  39 StringRef Binary::getData() const { return Data.getBuffer(); }
  40
  41 StringRef Binary::getFileName() const { return Data.getBufferIdentifier(); }
  42
  43 MemoryBufferRef Binary::getMemoryBufferRef() const { return Data; }
  44
  45 Expected<std::unique_ptr<Binary>> object::createBinary(MemoryBufferRef Buffer,
  46                                                       LLVMContext *Context) {
  47   file_magic Type = identify_magic(Buffer.getBuffer());
  48
  49   switch (Type) {
  50   case file_magic::archive:
  51     return Archive::create(Buffer);
  52   case file_magic::elf:
  53   case file_magic::elf_relocatable:
  54   case file_magic::elf_executable:
  55   case file_magic::elf_shared_object:
  56   case file_magic::elf_core:
  57   case file_magic::macho_object:
  58   case file_magic::macho_executable:
  59   case file_magic::macho_fixed_virtual_memory_shared_lib:
  60   case file_magic::macho_core:
  61   case file_magic::macho_preload_executable:
  62   case file_magic::macho_dynamically_linked_shared_lib:
  63   case file_magic::macho_dynamic_linker:
  64   case file_magic::macho_bundle:
  65   case file_magic::macho_dynamically_linked_shared_lib_stub:
  66   case file_magic::macho_dsym_companion:
  67   case file_magic::macho_kext_bundle:
  68   case file_magic::coff_object:
  69   case file_magic::coff_import_library:
  70   case file_magic::pecoff_executable:
  71   case file_magic::bitcode:
  72   case file_magic::wasm_object:
  73     return ObjectFile::createSymbolicFile(Buffer, Type, Context);
  74   case file_magic::macho_universal_binary:
  75     return MachOUniversalBinary::create(Buffer);
  76   case file_magic::windows_resource:
  77     return WindowsResource::createWindowsResource(Buffer);
  78   case file_magic::pdb:
  79     // PDB does not support the Binary interface.
  80     return errorCodeToError(object_error::invalid_file_type);
  81   case file_magic::unknown:
  82   case file_magic::coff_cl_gl_object:
  83     // Unrecognized object file format.
  84     return errorCodeToError(object_error::invalid_file_type);
  85   }
  86   llvm_unreachable("Unexpected Binary File Type");
  87 }
  88
  89 Expected<OwningBinary<Binary>> object::createBinary(StringRef Path) {
  90   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
  91       MemoryBuffer::getFileOrSTDIN(Path);
  92   if (std::error_code EC = FileOrErr.getError())
  93     return errorCodeToError(EC);
  94   std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
  95
  96   Expected<std::unique_ptr<Binary>> BinOrErr =
  97       createBinary(Buffer->getMemBufferRef());
  98   if (!BinOrErr)
  99     return BinOrErr.takeError();
 100   std::unique_ptr<Binary> &Bin = BinOrErr.get();
 101
 102   return OwningBinary<Binary>(std::move(Bin), std::move(Buffer));
 103 }