[api] Expose FunctionCallbackInfo::NewTarget

src/mips/code-stubs-mips.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.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 5590 matching lines @@
 
   typedef FunctionCallbackArguments FCA;
 
   STATIC_ASSERT(FCA::kContextSaveIndex == 6);
   STATIC_ASSERT(FCA::kCalleeIndex == 5);
   STATIC_ASSERT(FCA::kDataIndex == 4);
   STATIC_ASSERT(FCA::kReturnValueOffset == 3);
   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);
   if (!is_lazy()) {
     // Load context from callee.
     __ lw(context, FieldMemOperand(callee, JSFunction::kContextOffset));
   }
 
   Register scratch = call_data;
   if (!call_data_undefined()) {
     __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
   }
   // Push return value and default return value.
   __ Push(scratch, scratch);
   __ li(scratch, Operand(ExternalReference::isolate_address(masm->isolate())));
   // Push isolate and holder.
   __ Push(scratch, holder);
 
   // Prepare arguments.
   __ mov(scratch, sp);
 
   // 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);
 
   DCHECK(!api_function_address.is(a0) && !scratch.is(a0));
   // a0 = FunctionCallbackInfo&
   // Arguments is after the return address.
   __ Addu(a0, sp, Operand(1 * kPointerSize));
   // FunctionCallbackInfo::implicit_args_
   __ sw(scratch, MemOperand(a0, 0 * kPointerSize));
   // FunctionCallbackInfo::values_
   __ Addu(at, scratch, Operand((FCA::kArgsLength - 1 + argc()) * kPointerSize));
   __ sw(at, MemOperand(a0, 1 * kPointerSize));
   // FunctionCallbackInfo::length_ = argc
   __ li(at, Operand(argc()));
   __ sw(at, MemOperand(a0, 2 * kPointerSize));
-  // FunctionCallbackInfo::is_construct_call_ = 0
-  __ sw(zero_reg, MemOperand(a0, 3 * kPointerSize));
 
   ExternalReference thunk_ref =
       ExternalReference::invoke_function_callback(masm->isolate());
 
   AllowExternalCallThatCantCauseGC scope(masm);
   MemOperand context_restore_operand(
       fp, (2 + FCA::kContextSaveIndex) * kPointerSize);
   // Stores return the first js argument.
   int return_value_offset = 0;
   if (is_store()) {
     return_value_offset = 2 + FCA::kArgsLength;
   } else {
     return_value_offset = 2 + FCA::kReturnValueOffset;
   }
   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,
                            &context_restore_operand);
 }
 
 
 void CallApiGetterStub::Generate(MacroAssembler* masm) {
   // Build v8::PropertyCallbackInfo::args_ array on the stack and push property
   // name below the exit frame to make GC aware of them.
@@ skipping 55 matching lines @@
                            kStackUnwindSpace, kInvalidStackOffset,
                            return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS