code: def _indirect_jump_unresolved(self, jump):
          
  
          # add a node from this node to UnresolvableJumpTarget or UnresolvalbeCallTarget node,
          # depending on its jump kind
          src_node = self._nodes[jump.addr]
          if jump.jumpkind == 'Ijk_Boring':
              unresolvable_target_addr = self._unresolvable_jump_target_addr
              simprocedure_name = 'UnresolvableJumpTarget'
          elif jump.jumpkind == 'Ijk_Call':
              unresolvable_target_addr = self._unresolvable_call_target_addr
              simprocedure_name = 'UnresolvableCallTarget'
          else:
              raise AngrCFGError('It should be impossible')
  
          dst_node = CFGNode(unresolvable_target_addr, 0, self.model,
                             function_address=unresolvable_target_addr,
                             simprocedure_name=simprocedure_name,
                             block_id=unresolvable_target_addr,
                             )
  
          # add the dst_node to self._nodes
          if unresolvable_target_addr not in self._nodes:
              self._nodes[unresolvable_target_addr] = dst_node
              self._nodes_by_addr[unresolvable_target_addr].append(dst_node)
  
          self._graph_add_edge(dst_node, src_node, jump.jumpkind, jump.ins_addr, jump.stmt_idx)
          # mark it as a jumpout site for that function
          self._function_add_transition_edge(unresolvable_target_addr, src_node, jump.func_addr,
                                             to_outside=True,
                                             dst_func_addr=unresolvable_target_addr,
                                             ins_addr=jump.ins_addr,
                                             stmt_idx=jump.stmt_idx,
                                             )
  
          self._deregister_analysis_job(jump.func_addr, jump)
  
          CFGBase._indirect_jump_unresolved(self, jump)
docs: Called when we cannot resolve an indirect jump.
  
          :param IndirectJump jump: The unresolved indirect jump.
  
          :return:    None