Gdbserver can listen on local domain sockets.

John Darrington
2018-10-09T17:33:36Z

This is the complement to commit c1168a2f66553cd4730931cf59e3be8378a1a03f
It allows gdbserver to use a local (unix) domain socket instead of a TCP
socket.

It probably doesn't have much practical use, except that it makes automated
testing of gdb's remote target a little easier.