+
+ relocation_iterator
+ processSubtractRelocation(unsigned SectionID, relocation_iterator RelI,
+ const ObjectFile &BaseObjT,
+ ObjSectionToIDMap &ObjSectionToID) {
+ const MachOObjectFile &Obj =
+ static_cast<const MachOObjectFile&>(BaseObjT);
+ MachO::any_relocation_info RE =
+ Obj.getRelocation(RelI->getRawDataRefImpl());
+
+ unsigned Size = Obj.getAnyRelocationLength(RE);
+ uint64_t Offset = RelI->getOffset();
+ ErrorOr<StringRef> SubtrahendNameOrErr = RelI->getSymbol()->getName();
+ if (auto EC = SubtrahendNameOrErr.getError())
+ report_fatal_error(EC.message());
+ auto SubtrahendI = GlobalSymbolTable.find(*SubtrahendNameOrErr);
+ unsigned SectionBID = SubtrahendI->second.getSectionID();
+ uint64_t SectionBOffset = SubtrahendI->second.getOffset();
+
+ ++RelI;
+ ErrorOr<StringRef> MinuendNameOrErr = RelI->getSymbol()->getName();
+ if (auto EC = MinuendNameOrErr.getError())
+ report_fatal_error(EC.message());
+ auto MinuendI = GlobalSymbolTable.find(*MinuendNameOrErr);
+ unsigned SectionAID = MinuendI->second.getSectionID();
+ uint64_t SectionAOffset = MinuendI->second.getOffset();
+
+ uint64_t Addend = SectionAOffset - SectionBOffset;
+ RelocationEntry R(SectionID, Offset, MachO::X86_64_RELOC_SUBTRACTOR, Addend,
+ SectionAID, SectionAOffset, SectionBID, SectionBOffset,
+ false, Size);
+
+ addRelocationForSection(R, SectionAID);
+
+ return ++RelI;
+ }
+