py: Implement globals() and locals() builtins.
diff --git a/py/builtin.c b/py/builtin.c
index a6d14fa..fc037f1 100644
--- a/py/builtin.c
+++ b/py/builtin.c
@@ -410,3 +410,16 @@
 }
 
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_getattr_obj, 2, 3, mp_builtin_getattr);
+
+
+STATIC mp_obj_t mp_builtin_globals() {
+    return mp_globals_get();
+}
+
+MP_DEFINE_CONST_FUN_OBJ_0(mp_builtin_globals_obj, mp_builtin_globals);
+
+STATIC mp_obj_t mp_builtin_locals() {
+    return mp_locals_get();
+}
+
+MP_DEFINE_CONST_FUN_OBJ_0(mp_builtin_locals_obj, mp_builtin_locals);