[arm64] Assembler support for internal references.

src/arm64/assembler-arm64-inl.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ARM64_ASSEMBLER_ARM64_INL_H_
 #define V8_ARM64_ASSEMBLER_ARM64_INL_H_
 
 #include "src/arm64/assembler-arm64.h"
 #include "src/assembler.h"
 #include "src/debug.h"
 
 
 namespace v8 {
 namespace internal {
 
 
 bool CpuFeatures::SupportsCrankshaft() { return true; }
 
 
 void RelocInfo::apply(intptr_t delta, ICacheFlushMode icache_flush_mode) {
-  UNIMPLEMENTED();
+  // On arm64 only internal references need extra work.
+  DCHECK(RelocInfo::IsInternalReference(rmode_));
+
+  // Absolute code pointer inside code object moves with the code object.
+  intptr_t* p = reinterpret_cast<intptr_t*>(pc_);
+  *p += delta;  // Relocate entry.
 }
 
 
 void RelocInfo::set_target_address(Address target,
                                    WriteBarrierMode write_barrier_mode,
                                    ICacheFlushMode icache_flush_mode) {
   DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_));
   Assembler::set_target_address_at(pc_, host_, target, icache_flush_mode);
   if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL &&
       IsCodeTarget(rmode_)) {
@@ skipping 1258 matching lines @@
 
 
 void Assembler::ClearRecordedAstId() {
   recorded_ast_id_ = TypeFeedbackId::None();
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_ASSEMBLER_ARM64_INL_H_