What does 1 Samuel 26:14 mean?

He shouted to the soldiers and to Abner, Saul’s commander, 'Abner! Aren’t you going to answer me?' Abner replied, 'Who’s calling out to the king?' 1 Samuel 26:14 - Modern Text Bible

(David calls out to Saul’s army, especially Abner, to get their attention and start a conversation from a safe distance.)