code: def _hook_unmapped(self, uc, access, address, size, value, data):
          
  
          try:
              m = self._create_emulated_mapping(uc, address)
          except MemoryException as e:
              self._to_raise = e
              self._should_try_again = False
              return False
  
          self._should_try_again = True
          return False
docs: We hit an unmapped region; map it into unicorn.