1//===- SymbolicFile.cpp - Interface that only provides symbols --*- 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 a file format independent SymbolicFile class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Object/COFF.h"
15#include "llvm/Object/COFFImportFile.h"
16#include "llvm/Object/IRObjectFile.h"
17#include "llvm/Object/ObjectFile.h"
18#include "llvm/Object/SymbolicFile.h"
19#include "llvm/Support/MemoryBuffer.h"
20
21using namespace llvm;
22using namespace object;
23
24SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
25    : Binary(Type, Source) {}
26
27SymbolicFile::~SymbolicFile() {}
28
29ErrorOr<std::unique_ptr<SymbolicFile>> SymbolicFile::createSymbolicFile(
30    MemoryBufferRef Object, sys::fs::file_magic Type, LLVMContext *Context) {
31  StringRef Data = Object.getBuffer();
32  if (Type == sys::fs::file_magic::unknown)
33    Type = sys::fs::identify_magic(Data);
34
35  switch (Type) {
36  case sys::fs::file_magic::bitcode:
37    if (Context)
38      return IRObjectFile::create(Object, *Context);
39  // Fallthrough
40  case sys::fs::file_magic::unknown:
41  case sys::fs::file_magic::archive:
42  case sys::fs::file_magic::macho_universal_binary:
43  case sys::fs::file_magic::windows_resource:
44    return object_error::invalid_file_type;
45  case sys::fs::file_magic::elf:
46  case sys::fs::file_magic::elf_executable:
47  case sys::fs::file_magic::elf_shared_object:
48  case sys::fs::file_magic::elf_core:
49  case sys::fs::file_magic::macho_executable:
50  case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
51  case sys::fs::file_magic::macho_core:
52  case sys::fs::file_magic::macho_preload_executable:
53  case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
54  case sys::fs::file_magic::macho_dynamic_linker:
55  case sys::fs::file_magic::macho_bundle:
56  case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
57  case sys::fs::file_magic::macho_dsym_companion:
58  case sys::fs::file_magic::macho_kext_bundle:
59  case sys::fs::file_magic::pecoff_executable:
60    return ObjectFile::createObjectFile(Object, Type);
61  case sys::fs::file_magic::coff_import_library:
62    return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));
63  case sys::fs::file_magic::elf_relocatable:
64  case sys::fs::file_magic::macho_object:
65  case sys::fs::file_magic::coff_object: {
66    ErrorOr<std::unique_ptr<ObjectFile>> Obj =
67        ObjectFile::createObjectFile(Object, Type);
68    if (!Obj || !Context)
69      return std::move(Obj);
70
71    ErrorOr<MemoryBufferRef> BCData =
72        IRObjectFile::findBitcodeInObject(*Obj->get());
73    if (!BCData)
74      return std::move(Obj);
75
76    return IRObjectFile::create(
77        MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
78        *Context);
79  }
80  }
81  llvm_unreachable("Unexpected Binary File Type");
82}
83