+ struct SectionOffsetPair {
+ unsigned SectionID;
+ uint64_t Offset;
+ };
+
+ struct EHFrameRelatedSections {
+ EHFrameRelatedSections()
+ : EHFrameSID(RTDYLD_INVALID_SECTION_ID),
+ TextSID(RTDYLD_INVALID_SECTION_ID),
+ ExceptTabSID(RTDYLD_INVALID_SECTION_ID) {}
+
+ EHFrameRelatedSections(SID EH, SID T, SID Ex)
+ : EHFrameSID(EH), TextSID(T), ExceptTabSID(Ex) {}
+ SID EHFrameSID;
+ SID TextSID;
+ SID ExceptTabSID;
+ };
+
+ // 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<EHFrameRelatedSections, 2> UnregisteredEHFrameSections;
+
+ RuntimeDyldMachO(RuntimeDyld::MemoryManager &MemMgr,
+ RuntimeDyld::SymbolResolver &Resolver)
+ : RuntimeDyldImpl(MemMgr, Resolver) {}
+
+ /// This convenience method uses memcpy to extract a contiguous addend (the
+ /// addend size and offset are taken from the corresponding fields of the RE).
+ int64_t memcpyAddend(const RelocationEntry &RE) const;
+
+ /// Given a relocation_iterator for a non-scattered relocation, construct a
+ /// RelocationEntry and fill in the common fields. The 'Addend' field is *not*
+ /// filled in, since immediate encodings are highly target/opcode specific.
+ /// For targets/opcodes with simple, contiguous immediates (e.g. X86) the
+ /// memcpyAddend method can be used to read the immediate.
+ RelocationEntry getRelocationEntry(unsigned SectionID,
+ const ObjectFile &BaseTObj,
+ const relocation_iterator &RI) const {
+ const MachOObjectFile &Obj =
+ static_cast<const MachOObjectFile &>(BaseTObj);
+ MachO::any_relocation_info RelInfo =
+ Obj.getRelocation(RI->getRawDataRefImpl());
+
+ bool IsPCRel = Obj.getAnyRelocationPCRel(RelInfo);
+ unsigned Size = Obj.getAnyRelocationLength(RelInfo);
+ uint64_t Offset;
+ RI->getOffset(Offset);
+ MachO::RelocationInfoType RelType =
+ static_cast<MachO::RelocationInfoType>(Obj.getAnyRelocationType(RelInfo));
+
+ return RelocationEntry(SectionID, Offset, RelType, 0, IsPCRel, Size);
+ }
+
+ /// Construct a RelocationValueRef representing the relocation target.
+ /// For Symbols in known sections, this will return a RelocationValueRef
+ /// representing a (SectionID, Offset) pair.
+ /// For Symbols whose section is not known, this will return a
+ /// (SymbolName, Offset) pair, where the Offset is taken from the instruction
+ /// immediate (held in RE.Addend).
+ /// In both cases the Addend field is *NOT* fixed up to be PC-relative. That
+ /// should be done by the caller where appropriate by calling makePCRel on
+ /// the RelocationValueRef.
+ RelocationValueRef getRelocationValueRef(const ObjectFile &BaseTObj,
+ const relocation_iterator &RI,
+ const RelocationEntry &RE,
+ ObjSectionToIDMap &ObjSectionToID);
+
+ /// Make the RelocationValueRef addend PC-relative.
+ void makeValueAddendPCRel(RelocationValueRef &Value,
+ const ObjectFile &BaseTObj,
+ const relocation_iterator &RI,
+ unsigned OffsetToNextPC);
+
+ /// Dump information about the relocation entry (RE) and resolved value.
+ void dumpRelocationToResolve(const RelocationEntry &RE, uint64_t Value) const;
+
+ // Return a section iterator for the section containing the given address.
+ static section_iterator getSectionByAddress(const MachOObjectFile &Obj,
+ uint64_t Addr);
+
+
+ // Populate __pointers section.
+ void populateIndirectSymbolPointersSection(const MachOObjectFile &Obj,
+ const SectionRef &PTSection,
+ unsigned PTSectionID);