[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, 16 insertions, 3 deletions

diff --git a/lld/lib/ReaderWriter/MachO/ArchHandler_arm.cpp b/lld/lib/ReaderWriter/MachO/ArchHandler_arm.cpp
index 531189f4861..7b73ff1975b 100644
--- a/lld/lib/ReaderWriter/MachO/ArchHandler_arm.cpp
+++ b/lld/lib/ReaderWriter/MachO/ArchHandler_arm.cpp
@@ -36,6 +36,17 @@ 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,
@@ -59,6 +70,7 @@ public:
 
   void generateAtomContent(const DefinedAtom &atom, bool relocatable,
                            FindAddressForAtom findAddress,
+                           uint64_t imageBaseAddress,
                            uint8_t *atomContentBuffer) override;
 
   void appendSectionRelocations(const DefinedAtom &atom,
@@ -904,9 +916,10 @@ void ArchHandler_arm::applyFixupFinal(const Reference &ref, uint8_t *location,
 }
 
 void ArchHandler_arm::generateAtomContent(const DefinedAtom &atom,
-                                           bool relocatable,
-                                           FindAddressForAtom findAddress,
-                                           uint8_t *atomContentBuffer) {
+                                          bool relocatable,
+                                          FindAddressForAtom findAddress,
+                                          uint64_t imageBaseAddress,
+                                          uint8_t *atomContentBuffer) {
   // Copy raw bytes.
   memcpy(atomContentBuffer, atom.rawContent().data(), atom.size());
   // Apply fix-ups.