RuntimeDyldCOFF.cpp revision 283631
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 20using namespace llvm; 21using namespace llvm::object; 22 23#define DEBUG_TYPE "dyld" 24 25namespace { 26 27class LoadedCOFFObjectInfo 28 : public RuntimeDyld::LoadedObjectInfoHelper<LoadedCOFFObjectInfo> { 29public: 30 LoadedCOFFObjectInfo(RuntimeDyldImpl &RTDyld, unsigned BeginIdx, 31 unsigned EndIdx) 32 : LoadedObjectInfoHelper(RTDyld, BeginIdx, EndIdx) {} 33 34 OwningBinary<ObjectFile> 35 getObjectForDebug(const ObjectFile &Obj) const override { 36 return OwningBinary<ObjectFile>(); 37 } 38}; 39} 40 41namespace llvm { 42 43std::unique_ptr<RuntimeDyldCOFF> 44llvm::RuntimeDyldCOFF::create(Triple::ArchType Arch, 45 RuntimeDyld::MemoryManager &MemMgr, 46 RuntimeDyld::SymbolResolver &Resolver) { 47 switch (Arch) { 48 default: 49 llvm_unreachable("Unsupported target for RuntimeDyldCOFF."); 50 break; 51 case Triple::x86_64: 52 return make_unique<RuntimeDyldCOFFX86_64>(MemMgr, Resolver); 53 } 54} 55 56std::unique_ptr<RuntimeDyld::LoadedObjectInfo> 57RuntimeDyldCOFF::loadObject(const object::ObjectFile &O) { 58 unsigned SectionStartIdx, SectionEndIdx; 59 std::tie(SectionStartIdx, SectionEndIdx) = loadObjectImpl(O); 60 return llvm::make_unique<LoadedCOFFObjectInfo>(*this, SectionStartIdx, 61 SectionEndIdx); 62} 63 64uint64_t RuntimeDyldCOFF::getSymbolOffset(const SymbolRef &Sym) { 65 uint64_t Address; 66 if (Sym.getAddress(Address)) 67 return UnknownAddressOrSize; 68 69 if (Address == UnknownAddressOrSize) 70 return UnknownAddressOrSize; 71 72 const ObjectFile *Obj = Sym.getObject(); 73 section_iterator SecI(Obj->section_end()); 74 if (Sym.getSection(SecI)) 75 return UnknownAddressOrSize; 76 77 if (SecI == Obj->section_end()) 78 return UnknownAddressOrSize; 79 80 uint64_t SectionAddress = SecI->getAddress(); 81 return Address - SectionAddress; 82} 83 84bool RuntimeDyldCOFF::isCompatibleFile(const object::ObjectFile &Obj) const { 85 return Obj.isCOFF(); 86} 87 88} // namespace llvm 89