+ /// Parse the given relocation, which must be a non-scattered, and
+ /// return a RelocationEntry representing the information. The 'Addend' field
+ /// will contain the unmodified instruction immediate.
+ RelocationEntry getBasicRelocationEntry(unsigned SectionID, ObjectImage &Obj,
+ const relocation_iterator &RI) const;
+
+ /// 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(ObjectImage &ObjImg,
+ const relocation_iterator &RI,
+ const RelocationEntry &RE,
+ ObjSectionToIDMap &ObjSectionToID,
+ const SymbolTableMap &Symbols);
+
+ /// Make the RelocationValueRef addend PC-relative.
+ void makeValueAddendPCRel(RelocationValueRef &Value, ObjectImage &ObjImg,
+ const relocation_iterator &RI);
+
+ /// Dump information about the relocation entry (RE) and resolved value.
+ void dumpRelocationToResolve(const RelocationEntry &RE, uint64_t Value) const;
+
+public:
+ /// Create an ObjectImage from the given ObjectBuffer.
+ static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) {
+ return new ObjectImageCommon(InputBuffer);
+ }
+
+ /// Create an ObjectImage from the given ObjectFile.
+ static ObjectImage *
+ createObjectImageFromFile(std::unique_ptr<object::ObjectFile> InputObject) {
+ return new ObjectImageCommon(std::move(InputObject));
+ }
+
+ /// Create a RuntimeDyldMachO instance for the given target architecture.
+ static std::unique_ptr<RuntimeDyldMachO> create(Triple::ArchType Arch,
+ RTDyldMemoryManager *mm);
+
+ /// Write the least significant 'Size' bytes in 'Value' out at the address
+ /// pointed to by Addr. Check for overflow.
+ bool writeBytesUnaligned(uint8_t *Addr, uint64_t Value, unsigned Size);
+
+ SectionEntry &getSection(unsigned SectionID) { return Sections[SectionID]; }
+
+ bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
+ bool isCompatibleFile(const object::ObjectFile *Obj) const override;
+ void registerEHFrames() override;
+};
+
+/// RuntimeDyldMachOTarget - Templated base class for generic MachO linker
+/// algorithms and data structures.
+///
+/// Concrete, target specific sub-classes can be accessed via the impl()
+/// methods. (i.e. the RuntimeDyldMachO hierarchy uses the Curiously
+/// Recurring Template Idiom). Concrete subclasses for each target
+/// can be found in ./Targets.
+template <typename Impl>
+class RuntimeDyldMachOCRTPBase : public RuntimeDyldMachO {
+private:
+ Impl &impl() { return static_cast<Impl &>(*this); }
+ const Impl &impl() const { return static_cast<Impl &>(*this); }
+
+public:
+ RuntimeDyldMachOCRTPBase(RTDyldMemoryManager *mm) : RuntimeDyldMachO(mm) {}
+
+ void finalizeLoad(ObjectImage &ObjImg, ObjSectionToIDMap &SectionMap) {
+ unsigned EHFrameSID = RTDYLD_INVALID_SECTION_ID;
+ unsigned TextSID = RTDYLD_INVALID_SECTION_ID;
+ unsigned ExceptTabSID = RTDYLD_INVALID_SECTION_ID;
+ ObjSectionToIDMap::iterator i, e;
+
+ for (i = SectionMap.begin(), e = SectionMap.end(); i != e; ++i) {
+ const SectionRef &Section = i->first;
+ StringRef Name;
+ Section.getName(Name);
+ if (Name == "__eh_frame")
+ EHFrameSID = i->second;
+ else if (Name == "__text")
+ TextSID = i->second;
+ else if (Name == "__gcc_except_tab")
+ ExceptTabSID = i->second;
+ else
+ impl().finalizeSection(ObjImg, i->second, Section);
+ }
+ UnregisteredEHFrameSections.push_back(
+ EHFrameRelatedSections(EHFrameSID, TextSID, ExceptTabSID));
+ }