Revert "VM: New calling convention for generated code."

runtime/vm/debugger_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/code_patcher.h"
 #include "vm/cpu.h"
 #include "vm/debugger.h"
 #include "vm/instructions.h"
 #include "vm/stub_code.h"
 
 namespace dart {
 
-RawCode* CodeBreakpoint::OrigStubAddress() const {
+uword CodeBreakpoint::OrigStubAddress() const {
   return saved_value_;
 }
 
 
 void CodeBreakpoint::PatchCode() {
   ASSERT(!is_enabled_);
-  Code& stub_target = Code::Handle();
+  uword stub_target = 0;
   switch (breakpoint_kind_) {
     case RawPcDescriptors::kIcCall:
     case RawPcDescriptors::kUnoptStaticCall:
-      stub_target = StubCode::ICCallBreakpoint_entry()->code();
+      stub_target = StubCode::ICCallBreakpoint_entry()->EntryPoint();
       break;
     case RawPcDescriptors::kRuntimeCall: {
-      stub_target = StubCode::RuntimeCallBreakpoint_entry()->code();
+      stub_target = StubCode::RuntimeCallBreakpoint_entry()->EntryPoint();
       break;
     }
     default:
       UNREACHABLE();
   }
   const Code& code = Code::Handle(code_);
   saved_value_ =  CodePatcher::GetStaticCallTargetAt(pc_, code);
   CodePatcher::PatchPoolPointerCallAt(pc_, code, stub_target);
   is_enabled_ = true;
 }
 
 
 void CodeBreakpoint::RestoreCode() {
   ASSERT(is_enabled_);
   const Code& code = Code::Handle(code_);
   switch (breakpoint_kind_) {
     case RawPcDescriptors::kIcCall:
     case RawPcDescriptors::kUnoptStaticCall:
     case RawPcDescriptors::kRuntimeCall: {
-      CodePatcher::PatchPoolPointerCallAt(
-          pc_, code, Code::Handle(saved_value_));
+      CodePatcher::PatchPoolPointerCallAt(pc_, code, saved_value_);
       break;
     }
     default:
       UNREACHABLE();
   }
   is_enabled_ = false;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64