[api] Expose FunctionCallbackInfo::NewTarget

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index 1e5efbb0ac966f403b1c496728f824369a14c6da..a062090cf00438c6fa6acd4ca7697bb9622ac617 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -5636,7 +5636,11 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
-  STATIC_ASSERT(FCA::kArgsLength == 7);
+  STATIC_ASSERT(FCA::kNewTargetIndex == 7);
+  STATIC_ASSERT(FCA::kArgsLength == 8);
+
+  // new target
+  __ PushRoot(Heap::kUndefinedValueRootIndex);
 
   // Save context, callee and call data.
   __ Push(context, callee, call_data);
@@ -5660,7 +5664,7 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
-  const int kApiStackSpace = 4;
+  const int kApiStackSpace = 3;
 
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ EnterExitFrame(false, kApiStackSpace);
@@ -5680,8 +5684,6 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   // justified by n64 ABI.
   __ li(at, Operand(argc()));
   __ sw(at, MemOperand(a0, 2 * kPointerSize));
-  // FunctionCallbackInfo::is_construct_call_ = 0
-  __ sw(zero_reg, MemOperand(a0, 2 * kPointerSize + kIntSize));
 
   ExternalReference thunk_ref =
       ExternalReference::invoke_function_callback(masm->isolate());
@@ -5698,8 +5700,9 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   }
   MemOperand return_value_operand(fp, return_value_offset * kPointerSize);
   int stack_space = 0;
-  int32_t stack_space_offset = 4 * kPointerSize;
+  int32_t stack_space_offset = 3 * kPointerSize;
   stack_space = argc() + FCA::kArgsLength + 1;
+  // TODO(adamk): Why are we clobbering this immediately?
   stack_space_offset = kInvalidStackOffset;
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space,
                            stack_space_offset, return_value_operand,