1 //===-- RuntimeDyldCOFF.cpp - Run-time dynamic linker for MC-JIT -*- 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 // Implementation of COFF support for the MC-JIT runtime dynamic linker. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "RuntimeDyldCOFF.h" 15 #include "Targets/RuntimeDyldCOFFX86_64.h" 16 #include "llvm/ADT/STLExtras.h" 17 #include "llvm/ADT/Triple.h" 18 #include "llvm/Object/ObjectFile.h" 19 20 using namespace llvm; 21 using namespace llvm::object; 22 23 #define DEBUG_TYPE "dyld" 24 25 namespace { 26 27 class LoadedCOFFObjectInfo : public RuntimeDyld::LoadedObjectInfo { 28 public: 29 LoadedCOFFObjectInfo(RuntimeDyldImpl &RTDyld, unsigned BeginIdx, 30 unsigned EndIdx) 31 : RuntimeDyld::LoadedObjectInfo(RTDyld, BeginIdx, EndIdx) {} 32 33 OwningBinary<ObjectFile> 34 getObjectForDebug(const ObjectFile &Obj) const override { 35 return OwningBinary<ObjectFile>(); 36 } 37 }; 38 } 39 40 namespace llvm { 41 42 std::unique_ptr<RuntimeDyldCOFF> 43 llvm::RuntimeDyldCOFF::create(Triple::ArchType Arch, 44 RuntimeDyld::MemoryManager &MemMgr, 45 RuntimeDyld::SymbolResolver &Resolver) { 46 switch (Arch) { 47 default: 48 llvm_unreachable("Unsupported target for RuntimeDyldCOFF."); 49 break; 50 case Triple::x86_64: 51 return make_unique<RuntimeDyldCOFFX86_64>(MemMgr, Resolver); 52 } 53 } 54 55 std::unique_ptr<RuntimeDyld::LoadedObjectInfo> 56 RuntimeDyldCOFF::loadObject(const object::ObjectFile &O) { 57 unsigned SectionStartIdx, SectionEndIdx; 58 std::tie(SectionStartIdx, SectionEndIdx) = loadObjectImpl(O); 59 return llvm::make_unique<LoadedCOFFObjectInfo>(*this, SectionStartIdx, 60 SectionEndIdx); 61 } 62 63 uint64_t RuntimeDyldCOFF::getSymbolOffset(const SymbolRef &Sym) { 64 uint64_t Address; 65 if (Sym.getAddress(Address)) 66 return UnknownAddressOrSize; 67 68 if (Address == UnknownAddressOrSize) 69 return UnknownAddressOrSize; 70 71 const ObjectFile *Obj = Sym.getObject(); 72 section_iterator SecI(Obj->section_end()); 73 if (Sym.getSection(SecI)) 74 return UnknownAddressOrSize; 75 76 if (SecI == Obj->section_end()) 77 return UnknownAddressOrSize; 78 79 uint64_t SectionAddress = SecI->getAddress(); 80 return Address - SectionAddress; 81 } 82 83 bool RuntimeDyldCOFF::isCompatibleFile(const object::ObjectFile &Obj) const { 84 return Obj.isCOFF(); 85 } 86 87 } // namespace llvm 88
