| //===-- RuntimeDyldELF.h - Run-time dynamic linker for MC-JIT ---*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // ELF support for MC-JIT runtime dynamic linker. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_RUNTIME_DYLD_ELF_H |
| #define LLVM_RUNTIME_DYLD_ELF_H |
| |
| #include "RuntimeDyldImpl.h" |
| #include "llvm/ADT/DenseMap.h" |
| |
| using namespace llvm; |
| |
| namespace llvm { |
| |
| namespace { |
| // Helper for extensive error checking in debug builds. |
| error_code Check(error_code Err) { |
| if (Err) { |
| report_fatal_error(Err.message()); |
| } |
| return Err; |
| } |
| } // end anonymous namespace |
| |
| class RuntimeDyldELF : public RuntimeDyldImpl { |
| void resolveRelocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint64_t Value, |
| uint32_t Type, |
| int64_t Addend, |
| uint64_t SymOffset=0); |
| |
| void resolveX86_64Relocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint64_t Value, |
| uint32_t Type, |
| int64_t Addend, |
| uint64_t SymOffset); |
| |
| void resolveX86Relocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint32_t Value, |
| uint32_t Type, |
| int32_t Addend); |
| |
| void resolveAArch64Relocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint64_t Value, |
| uint32_t Type, |
| int64_t Addend); |
| |
| void resolveARMRelocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint32_t Value, |
| uint32_t Type, |
| int32_t Addend); |
| |
| void resolveMIPSRelocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint32_t Value, |
| uint32_t Type, |
| int32_t Addend); |
| |
| void resolvePPC64Relocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint64_t Value, |
| uint32_t Type, |
| int64_t Addend); |
| |
| void resolveSystemZRelocation(const SectionEntry &Section, |
| uint64_t Offset, |
| uint64_t Value, |
| uint32_t Type, |
| int64_t Addend); |
| |
| unsigned getMaxStubSize() { |
| if (Arch == Triple::aarch64) |
| return 20; // movz; movk; movk; movk; br |
| if (Arch == Triple::arm || Arch == Triple::thumb) |
| return 8; // 32-bit instruction and 32-bit address |
| else if (Arch == Triple::mipsel || Arch == Triple::mips) |
| return 16; |
| else if (Arch == Triple::ppc64 || Arch == Triple::ppc64le) |
| return 44; |
| else if (Arch == Triple::x86_64) |
| return 6; // 2-byte jmp instruction + 32-bit relative address |
| else if (Arch == Triple::systemz) |
| return 16; |
| else |
| return 0; |
| } |
| |
| unsigned getStubAlignment() { |
| if (Arch == Triple::systemz) |
| return 8; |
| else |
| return 1; |
| } |
| |
| uint64_t findPPC64TOC() const; |
| void findOPDEntrySection(ObjectImage &Obj, |
| ObjSectionToIDMap &LocalSections, |
| RelocationValueRef &Rel); |
| |
| uint64_t findGOTEntry(uint64_t LoadAddr, uint64_t Offset); |
| size_t getGOTEntrySize(); |
| |
| virtual void updateGOTEntries(StringRef Name, uint64_t Addr); |
| |
| // Relocation entries for symbols whose position-independant offset is |
| // updated in a global offset table. |
| typedef SmallVector<RelocationValueRef, 2> GOTRelocations; |
| GOTRelocations GOTEntries; // List of entries requiring finalization. |
| SmallVector<std::pair<SID, GOTRelocations>, 8> GOTs; // Allocated tables. |
| |
| // When a module is loaded we save the SectionID of the EH frame section |
| // in a table until we receive a request to register all unregistered |
| // EH frame sections with the memory manager. |
| SmallVector<SID, 2> UnregisteredEHFrameSections; |
| SmallVector<SID, 2> RegisteredEHFrameSections; |
| |
| public: |
| RuntimeDyldELF(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) |
| {} |
| |
| virtual void resolveRelocation(const RelocationEntry &RE, uint64_t Value); |
| virtual void processRelocationRef(unsigned SectionID, |
| RelocationRef RelI, |
| ObjectImage &Obj, |
| ObjSectionToIDMap &ObjSectionToID, |
| const SymbolTableMap &Symbols, |
| StubMap &Stubs); |
| virtual bool isCompatibleFormat(const ObjectBuffer *Buffer) const; |
| virtual ObjectImage *createObjectImage(ObjectBuffer *InputBuffer); |
| virtual void registerEHFrames(); |
| virtual void deregisterEHFrames(); |
| virtual void finalizeLoad(ObjSectionToIDMap &SectionMap); |
| virtual ~RuntimeDyldELF(); |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |