[Interpreter] Add CallRuntime support to the interpreter.

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index a8a4b5f5ac5f24bf4e3f0b4d70c2cd2f2acd745a..02b945f1776ab33f1ee08c55724f58c2c3d6a9ef 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -974,14 +974,21 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   // fp: frame pointer  (restored after C call)
   // sp: stack pointer  (restored as callee's sp after C call)
   // cp: current context  (C callee-saved)
-
+  //
+  // If argv_in_register():
+  // r2: pointer to the first argument
   ProfileEntryHookStub::MaybeCallEntryHook(masm);
 
   __ mov(r5, Operand(r1));
 
-  // Compute the argv pointer in a callee-saved register.
-  __ add(r1, sp, Operand(r0, LSL, kPointerSizeLog2));
-  __ sub(r1, r1, Operand(kPointerSize));
+  if (!argv_in_register()) {
+    // Compute the argv pointer in a callee-saved register.
+    __ add(r1, sp, Operand(r0, LSL, kPointerSizeLog2));
+    __ sub(r1, r1, Operand(kPointerSize));
+  } else {
+    // Move argv into the correct register.
+    __ mov(r1, Operand(r2));
+  }
 
   // Enter the exit frame that transitions from JavaScript to C++.
   FrameScope scope(masm, StackFrame::MANUAL);