add support for objective C classes in OSX and json format

volatility/framework/objects/__init__.py

@@ -647,6 +647,8 @@ class Struct(interfaces.objects.ObjectInterface):
 class Union(Struct):
     pass
 
+class vol_class(Struct):
+    pass
 
 # Really nasty way of duplicating the class
 # WILL cause problems with any mutable class/static variables

volatility/framework/symbols/intermed.py

@@ -342,7 +342,7 @@ class Version1Format(ISFormatTable):
             return native_template
 
         # Otherwise
-        if dictionary['kind'] not in ['struct', 'union']:
+        if dictionary['kind'] not in ['struct', 'union', 'vol_class']:
             raise exceptions.SymbolSpaceError("Unknown Intermediate format: {}".format(dictionary))
 
         reference_name = dictionary['name']