- // For each symbol, keep a list of relocations based on it. Anytime
- // its address is reassigned (the JIT re-compiled the function, e.g.),
- // the relocations get re-resolved.
- // The symbol (or section) the relocation is sourced from is the Key
- // in the relocation list where it's stored.
- struct RelocationEntry {
- unsigned SectionID; // Section the relocation is contained in.
- uint64_t Offset; // Offset into the section for the relocation.
- uint32_t Data; // Second word of the raw macho relocation entry.
- int64_t Addend; // Addend encoded in the instruction itself, if any,
- // plus the offset into the source section for
- // the symbol once the relocation is resolvable.
-
- RelocationEntry(unsigned id, uint64_t offset, uint32_t data, int64_t addend)
- : SectionID(id), Offset(offset), Data(data), Addend(addend) {}
- };
- typedef SmallVector<RelocationEntry, 4> RelocationList;
- // Relocations to sections already loaded. Indexed by SectionID which is the
- // source of the address. The target where the address will be writen is
- // SectionID/Offset in the relocation itself.
- IndexedMap<RelocationList> Relocations;
- // Relocations to symbols that are not yet resolved. Must be external
- // relocations by definition. Indexed by symbol name.
- StringMap<RelocationList> UnresolvedRelocations;
-
- bool resolveRelocation(uint8_t *Address, uint64_t Value, bool isPCRel,
- unsigned Type, unsigned Size, int64_t Addend);
- bool resolveX86_64Relocation(uintptr_t Address, uintptr_t Value, bool isPCRel,
- unsigned Type, unsigned Size, int64_t Addend);
- bool resolveARMRelocation(uintptr_t Address, uintptr_t Value, bool isPCRel,
- unsigned Type, unsigned Size, int64_t Addend);
-
- bool loadSegment32(const MachOObject *Obj,
- const MachOObject::LoadCommandInfo *SegmentLCI,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
- bool loadSegment64(const MachOObject *Obj,
- const MachOObject::LoadCommandInfo *SegmentLCI,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
- bool processSymbols32(const MachOObject *Obj,
- SmallVectorImpl<unsigned> &SectionMap,
- SmallVectorImpl<StringRef> &SymbolNames,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
- bool processSymbols64(const MachOObject *Obj,
- SmallVectorImpl<unsigned> &SectionMap,
- SmallVectorImpl<StringRef> &SymbolNames,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
-
- void resolveSymbol(StringRef Name);
-
-public:
- RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
-
- bool loadObject(MemoryBuffer *InputBuffer);
-
- void reassignSectionAddress(unsigned SectionID, uint64_t Addr);
-
- static bool isKnownFormat(const MemoryBuffer *InputBuffer);
-
- bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const {
- return isKnownFormat(InputBuffer);
- }