133 lines · cpp
1//===- SymbolicFile.cpp - Interface that only provides symbols ------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file defines a file format independent SymbolicFile class.10//11//===----------------------------------------------------------------------===//12 13#include "llvm/Object/SymbolicFile.h"14#include "llvm/ADT/StringRef.h"15#include "llvm/BinaryFormat/Magic.h"16#include "llvm/Object/COFFImportFile.h"17#include "llvm/Object/Error.h"18#include "llvm/Object/IRObjectFile.h"19#include "llvm/Object/ObjectFile.h"20#include "llvm/Support/Error.h"21#include "llvm/Support/ErrorHandling.h"22#include <memory>23 24using namespace llvm;25using namespace object;26 27namespace llvm {28class LLVMContext;29}30 31SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)32 : Binary(Type, Source) {}33 34SymbolicFile::~SymbolicFile() = default;35 36Expected<std::unique_ptr<SymbolicFile>>37SymbolicFile::createSymbolicFile(MemoryBufferRef Object, file_magic Type,38 LLVMContext *Context, bool InitContent) {39 StringRef Data = Object.getBuffer();40 if (Type == file_magic::unknown)41 Type = identify_magic(Data);42 43 if (!isSymbolicFile(Type, Context))44 return errorCodeToError(object_error::invalid_file_type);45 46 switch (Type) {47 case file_magic::bitcode:48 // Context is guaranteed to be non-null here, because bitcode magic only49 // indicates a symbolic file when Context is non-null.50 return IRObjectFile::create(Object, *Context);51 case file_magic::elf:52 case file_magic::elf_executable:53 case file_magic::elf_shared_object:54 case file_magic::elf_core:55 case file_magic::goff_object:56 case file_magic::macho_executable:57 case file_magic::macho_fixed_virtual_memory_shared_lib:58 case file_magic::macho_core:59 case file_magic::macho_preload_executable:60 case file_magic::macho_dynamically_linked_shared_lib:61 case file_magic::macho_dynamic_linker:62 case file_magic::macho_bundle:63 case file_magic::macho_dynamically_linked_shared_lib_stub:64 case file_magic::macho_dsym_companion:65 case file_magic::macho_kext_bundle:66 case file_magic::macho_file_set:67 case file_magic::pecoff_executable:68 case file_magic::xcoff_object_32:69 case file_magic::xcoff_object_64:70 case file_magic::wasm_object:71 case file_magic::dxcontainer_object:72 return ObjectFile::createObjectFile(Object, Type, InitContent);73 case file_magic::coff_import_library:74 return std::unique_ptr<SymbolicFile>(new COFFImportFile(Object));75 case file_magic::elf_relocatable:76 case file_magic::macho_object:77 case file_magic::coff_object: {78 Expected<std::unique_ptr<ObjectFile>> Obj =79 ObjectFile::createObjectFile(Object, Type, InitContent);80 if (!Obj || !Context)81 return std::move(Obj);82 83 Expected<MemoryBufferRef> BCData =84 IRObjectFile::findBitcodeInObject(*Obj->get());85 if (!BCData) {86 consumeError(BCData.takeError());87 return std::move(Obj);88 }89 90 return IRObjectFile::create(91 MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),92 *Context);93 }94 default:95 llvm_unreachable("Unexpected Binary File Type");96 }97}98 99bool SymbolicFile::isSymbolicFile(file_magic Type, const LLVMContext *Context) {100 switch (Type) {101 case file_magic::bitcode:102 return Context != nullptr;103 case file_magic::elf:104 case file_magic::elf_executable:105 case file_magic::elf_shared_object:106 case file_magic::elf_core:107 case file_magic::goff_object:108 case file_magic::macho_executable:109 case file_magic::macho_fixed_virtual_memory_shared_lib:110 case file_magic::macho_core:111 case file_magic::macho_preload_executable:112 case file_magic::macho_dynamically_linked_shared_lib:113 case file_magic::macho_dynamic_linker:114 case file_magic::macho_bundle:115 case file_magic::macho_dynamically_linked_shared_lib_stub:116 case file_magic::macho_dsym_companion:117 case file_magic::macho_kext_bundle:118 case file_magic::macho_file_set:119 case file_magic::pecoff_executable:120 case file_magic::xcoff_object_32:121 case file_magic::xcoff_object_64:122 case file_magic::wasm_object:123 case file_magic::coff_import_library:124 case file_magic::elf_relocatable:125 case file_magic::macho_object:126 case file_magic::coff_object:127 case file_magic::dxcontainer_object:128 return true;129 default:130 return false;131 }132}133