This has been discussed many times in this forum. Pretty much the
consensus is, "there is not much you can do about it". Some have glued it back in place, with mixed results. You need access to both sides to try and squeeze both sides back in place via some sort of clamping system. The type of glue/epoxy is fussy since depending on what material you have in the wall, will depend on why type of adhesive to use.
Some have reported using syringes after drilling holes and injecting the adhesive. So far, no one that I am aware of has reported back with success stories.
Here is a YouTube video on one such repair
HERE