[RuntimeDyld] MachO: Add support for ARM scattered vanilla relocations.

llvm-svn: 243126

1 files changed, 36 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
index c0741141757..c61b1c2fb27 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
@@ -50,6 +50,42 @@ int64_t RuntimeDyldMachO::memcpyAddend(const RelocationEntry &RE) const {
   return static_cast<int64_t>(readBytesUnaligned(Src, NumBytes));
 }
 
+relocation_iterator RuntimeDyldMachO::processScatteredVANILLA(
+                          unsigned SectionID, relocation_iterator RelI,
+                          const ObjectFile &BaseObjT,
+                          RuntimeDyldMachO::ObjSectionToIDMap &ObjSectionToID) {
+  const MachOObjectFile &Obj =
+    static_cast<const MachOObjectFile&>(BaseObjT);
+  MachO::any_relocation_info RE =
+    Obj.getRelocation(RelI->getRawDataRefImpl());
+
+  SectionEntry &Section = Sections[SectionID];
+  uint32_t RelocType = Obj.getAnyRelocationType(RE);
+  bool IsPCRel = Obj.getAnyRelocationPCRel(RE);
+  unsigned Size = Obj.getAnyRelocationLength(RE);
+  uint64_t Offset = RelI->getOffset();
+  uint8_t *LocalAddress = Section.Address + Offset;
+  unsigned NumBytes = 1 << Size;
+  int64_t Addend = readBytesUnaligned(LocalAddress, NumBytes);
+
+  unsigned SymbolBaseAddr = Obj.getScatteredRelocationValue(RE);
+  section_iterator TargetSI = getSectionByAddress(Obj, SymbolBaseAddr);
+  assert(TargetSI != Obj.section_end() && "Can't find section for symbol");
+  uint64_t SectionBaseAddr = TargetSI->getAddress();
+  SectionRef TargetSection = *TargetSI;
+  bool IsCode = TargetSection.isText();
+  uint32_t TargetSectionID =
+    findOrEmitSection(Obj, TargetSection, IsCode, ObjSectionToID);
+
+  Addend -= SectionBaseAddr;
+  RelocationEntry R(SectionID, Offset, RelocType, Addend, IsPCRel, Size);
+
+  addRelocationForSection(R, TargetSectionID);
+
+  return ++RelI;
+}
+
+
 RelocationValueRef RuntimeDyldMachO::getRelocationValueRef(
     const ObjectFile &BaseTObj, const relocation_iterator &RI,
     const RelocationEntry &RE, ObjSectionToIDMap &ObjSectionToID) {