code: def is_system_defined_breakpoint(self, address):
          
          if address:
              module = self.get_module_at_address(address)
              if module:
                  return module.match_name("ntdll")    or \
                         module.match_name("kernel32")
          return False
docs: @type  address: int
          @param address: Memory address.
  
          @rtype:  bool
          @return: C{True} if the given address points to a system defined
              breakpoint. System defined breakpoints are hardcoded into
              system libraries.