1 //===- TapiFile.cpp -------------------------------------------------------===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines the Text-based Dynamcic Library Stub format. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Object/TapiFile.h" 14 #include "llvm/ADT/StringRef.h" 15 #include "llvm/BinaryFormat/MachO.h" 16 #include "llvm/Object/Error.h" 17 #include "llvm/Support/MemoryBufferRef.h" 18 #include "llvm/TextAPI/ArchitectureSet.h" 19 #include "llvm/TextAPI/InterfaceFile.h" 20 #include "llvm/TextAPI/Platform.h" 21 #include "llvm/TextAPI/Symbol.h" 22 23 using namespace llvm; 24 using namespace MachO; 25 using namespace object; 26 27 static uint32_t getFlags(const Symbol *Sym) { 28 uint32_t Flags = BasicSymbolRef::SF_Global; 29 if (Sym->isUndefined()) 30 Flags |= BasicSymbolRef::SF_Undefined; 31 else 32 Flags |= BasicSymbolRef::SF_Exported; 33 34 if (Sym->isWeakDefined() || Sym->isWeakReferenced()) 35 Flags |= BasicSymbolRef::SF_Weak; 36 37 return Flags; 38 } 39 40 TapiFile::TapiFile(MemoryBufferRef Source, const InterfaceFile &interface, 41 Architecture Arch) 42 : SymbolicFile(ID_TapiFile, Source), Arch(Arch) { 43 for (const auto *Symbol : interface.symbols()) { 44 if (!Symbol->getArchitectures().has(Arch)) 45 continue; 46 47 switch (Symbol->getKind()) { 48 case SymbolKind::GlobalSymbol: 49 Symbols.emplace_back(StringRef(), Symbol->getName(), getFlags(Symbol)); 50 break; 51 case SymbolKind::ObjectiveCClass: 52 if (interface.getPlatforms().count(PLATFORM_MACOS) && Arch == AK_i386) { 53 Symbols.emplace_back(ObjC1ClassNamePrefix, Symbol->getName(), 54 getFlags(Symbol)); 55 } else { 56 Symbols.emplace_back(ObjC2ClassNamePrefix, Symbol->getName(), 57 getFlags(Symbol)); 58 Symbols.emplace_back(ObjC2MetaClassNamePrefix, Symbol->getName(), 59 getFlags(Symbol)); 60 } 61 break; 62 case SymbolKind::ObjectiveCClassEHType: 63 Symbols.emplace_back(ObjC2EHTypePrefix, Symbol->getName(), 64 getFlags(Symbol)); 65 break; 66 case SymbolKind::ObjectiveCInstanceVariable: 67 Symbols.emplace_back(ObjC2IVarPrefix, Symbol->getName(), 68 getFlags(Symbol)); 69 break; 70 } 71 } 72 } 73 74 TapiFile::~TapiFile() = default; 75 76 void TapiFile::moveSymbolNext(DataRefImpl &DRI) const { DRI.d.a++; } 77 78 Error TapiFile::printSymbolName(raw_ostream &OS, DataRefImpl DRI) const { 79 assert(DRI.d.a < Symbols.size() && "Attempt to access symbol out of bounds"); 80 const Symbol &Sym = Symbols[DRI.d.a]; 81 OS << Sym.Prefix << Sym.Name; 82 return Error::success(); 83 } 84 85 Expected<uint32_t> TapiFile::getSymbolFlags(DataRefImpl DRI) const { 86 assert(DRI.d.a < Symbols.size() && "Attempt to access symbol out of bounds"); 87 return Symbols[DRI.d.a].Flags; 88 } 89 90 basic_symbol_iterator TapiFile::symbol_begin() const { 91 DataRefImpl DRI; 92 DRI.d.a = 0; 93 return BasicSymbolRef{DRI, this}; 94 } 95 96 basic_symbol_iterator TapiFile::symbol_end() const { 97 DataRefImpl DRI; 98 DRI.d.a = Symbols.size(); 99 return BasicSymbolRef{DRI, this}; 100 } 101