[mach-o] create __unwind_info section on x86_64

This is a minimally useful pass to construct the __unwind_info section in a
final object from the various __compact_unwind inputs. Currently it doesn't
produce any compressed pages, only works for x86_64 and will fail if any
function ends up without __compact_unwind.

rdar://problem/18208653

llvm-svn: 218703

1 files changed, 13 insertions, 0 deletions

diff --git a/lld/lib/ReaderWriter/MachO/ArchHandler_arm64.cpp b/lld/lib/ReaderWriter/MachO/ArchHandler_arm64.cpp
index ebd0084b3cd..31021030dad 100644
--- a/lld/lib/ReaderWriter/MachO/ArchHandler_arm64.cpp
+++ b/lld/lib/ReaderWriter/MachO/ArchHandler_arm64.cpp
@@ -76,6 +76,17 @@ public:
   bool isCallSite(const Reference &) override;
   bool isPointer(const Reference &) override;
   bool isPairedReloc(const normalized::Relocation &) override;
+
+  bool needsCompactUnwind() override {
+    return false;
+  }
+  Reference::KindValue imageOffsetKind() override {
+    return invalid;
+  }
+  Reference::KindValue imageOffsetKindIndirect() override {
+    return invalid;
+  }
+
   std::error_code getReferenceInfo(const normalized::Relocation &reloc,
                                    const DefinedAtom *inAtom,
                                    uint32_t offsetInAtom,
@@ -103,6 +114,7 @@ public:
 
   void generateAtomContent(const DefinedAtom &atom, bool relocatable,
                            FindAddressForAtom findAddress,
+                           uint64_t imageBaseAddress,
                            uint8_t *atomContentBuffer) override;
 
   void appendSectionRelocations(const DefinedAtom &atom,
@@ -440,6 +452,7 @@ std::error_code ArchHandler_arm64::getPairReferenceInfo(
 void ArchHandler_arm64::generateAtomContent(const DefinedAtom &atom,
                                             bool relocatable,
                                             FindAddressForAtom findAddress,
+                                            uint64_t imageBaseAddress,
                                             uint8_t *atomContentBuffer) {
   // Copy raw bytes.
   memcpy(atomContentBuffer, atom.rawContent().data(), atom.size());