Refactor runtime support.

Change-Id: Id7470a4105838150d5ceb73ab2c8c83e739660df
diff --git a/src/oat/runtime/callee_save_frame.h b/src/oat/runtime/callee_save_frame.h
new file mode 100644
index 0000000..96811ce
--- /dev/null
+++ b/src/oat/runtime/callee_save_frame.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2012 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_OAT_RUNTIME_CALLEE_SAVE_FRAME_H_
+#define ART_SRC_OAT_RUNTIME_CALLEE_SAVE_FRAME_H_
+
+#include "thread.h"
+
+namespace art {
+
+class Method;
+
+// Place a special frame at the TOS that will save the callee saves for the given type
+static void  FinishCalleeSaveFrameSetup(Thread* self, Method** sp, Runtime::CalleeSaveType type) {
+  // Be aware the store below may well stomp on an incoming argument
+  *sp = Runtime::Current()->GetCalleeSaveMethod(type);
+  self->SetTopOfStack(sp, 0);
+  self->VerifyStack();
+}
+
+}  // namespace art
+
+#endif  // ART_SRC_OAT_RUNTIME_CALLEE_SAVE_FRAME_H_