Direct call API functions.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
===================================================================
--- src/ia32/code-stubs-ia32.cc	(revision 5789)
+++ src/ia32/code-stubs-ia32.cc	(working copy)
@@ -3067,6 +3067,26 @@
 }
 
 
+void ApiCallEntryStub::Generate(MacroAssembler* masm) {
+  __ PrepareCallApiFunction(kStackSpace, kArgc);
+  STATIC_ASSERT(kArgc == 5);
+
+  // Allocate the v8::Arguments structure in the arguments' space since
+  // it's not controlled by GC.
+  __ mov(ApiParameterOperand(1), eax);  // v8::Arguments::implicit_args_.
+  __ mov(ApiParameterOperand(2), ebx);  // v8::Arguments::values_.
+  __ mov(ApiParameterOperand(3), edx);  // v8::Arguments::length_.
+  // v8::Arguments::is_construct_call_.
+  __ mov(ApiParameterOperand(4), Immediate(0));
+
+  // v8::InvocationCallback's argument.
+  __ lea(eax, ApiParameterOperand(1));
+  __ mov(ApiParameterOperand(0), eax);
+
+  __ CallApiFunctionAndReturn(fun(), kArgc);
+}
+
+
 void CEntryStub::GenerateCore(MacroAssembler* masm,
                               Label* throw_normal_exception,
                               Label* throw_termination_exception,