1 //===-- RuntimeDyldMachO.h - 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 // MachO support for MC-JIT runtime dynamic linker. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_RUNTIME_DYLD_MACHO_H 15 #define LLVM_RUNTIME_DYLD_MACHO_H 16 17 #include "RuntimeDyldImpl.h" 18 #include "llvm/ADT/IndexedMap.h" 19 #include "llvm/Object/MachO.h" 20 #include "llvm/Support/Format.h" 21 22 using namespace llvm; 23 using namespace llvm::object; 24 25 26 namespace llvm { 27 class RuntimeDyldMachO : public RuntimeDyldImpl { 28 bool resolveI386Relocation(uint8_t *LocalAddress, 29 uint64_t FinalAddress, 30 uint64_t Value, 31 bool isPCRel, 32 unsigned Type, 33 unsigned Size, 34 int64_t Addend); 35 bool resolveX86_64Relocation(uint8_t *LocalAddress, 36 uint64_t FinalAddress, 37 uint64_t Value, 38 bool isPCRel, 39 unsigned Type, 40 unsigned Size, 41 int64_t Addend); 42 bool resolveARMRelocation(uint8_t *LocalAddress, 43 uint64_t FinalAddress, 44 uint64_t Value, 45 bool isPCRel, 46 unsigned Type, 47 unsigned Size, 48 int64_t Addend); 49 50 void resolveRelocation(const SectionEntry &Section, 51 uint64_t Offset, 52 uint64_t Value, 53 uint32_t Type, 54 int64_t Addend, 55 bool isPCRel, 56 unsigned Size); 57 58 unsigned getMaxStubSize() { 59 if (Arch == Triple::arm || Arch == Triple::thumb) 60 return 8; // 32-bit instruction and 32-bit address 61 else if (Arch == Triple::x86_64) 62 return 8; // GOT entry 63 else 64 return 0; 65 } 66 67 unsigned getStubAlignment() { 68 return 1; 69 } 70 71 struct EHFrameRelatedSections { 72 EHFrameRelatedSections() : EHFrameSID(RTDYLD_INVALID_SECTION_ID), 73 TextSID(RTDYLD_INVALID_SECTION_ID), 74 ExceptTabSID(RTDYLD_INVALID_SECTION_ID) {} 75 EHFrameRelatedSections(SID EH, SID T, SID Ex) 76 : EHFrameSID(EH), TextSID(T), ExceptTabSID(Ex) {} 77 SID EHFrameSID; 78 SID TextSID; 79 SID ExceptTabSID; 80 }; 81 82 // When a module is loaded we save the SectionID of the EH frame section 83 // in a table until we receive a request to register all unregistered 84 // EH frame sections with the memory manager. 85 SmallVector<EHFrameRelatedSections, 2> UnregisteredEHFrameSections; 86 public: 87 RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {} 88 89 virtual void resolveRelocation(const RelocationEntry &RE, uint64_t Value); 90 virtual void processRelocationRef(unsigned SectionID, 91 RelocationRef RelI, 92 ObjectImage &Obj, 93 ObjSectionToIDMap &ObjSectionToID, 94 const SymbolTableMap &Symbols, 95 StubMap &Stubs); 96 virtual bool isCompatibleFormat(const ObjectBuffer *Buffer) const; 97 virtual void registerEHFrames(); 98 virtual void finalizeLoad(ObjSectionToIDMap &SectionMap); 99 }; 100 101 } // end namespace llvm 102 103 #endif 104