[builtins] Sanitize the machinery around Construct calls.

src/arm64/interface-descriptors-arm64.cc

 // Copyright 2012 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.
 
 #include "src/arm64/interface-descriptors-arm64.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/interface-descriptors.h"
 
@@ skipping 203 matching lines @@
 
 void CallTrampolineDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // x1: target
   // x0: number of arguments
   Register registers[] = {x1, x0};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
+void ConstructTrampolineDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // x3: new target
+  // x1: target
+  // x0: number of arguments
+  Register registers[] = {x1, x3, x0};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void RegExpConstructResultDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // x2: length
   // x1: index (of last match)
   // x0: string
   Register registers[] = {x2, x1, x0};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
@@ skipping 247 matching lines @@
       x1    // the runtime function to call
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64