I saw libbinder code in the framework base code base /libs/binder. But since jellybean, libbinder is moved somewhere else and I could never find it. Nevertheless, I still find many libraries referencing it. I would like to know where it it now.
P.S. the libbinder code in 4.04r2.1 can be foud here.
It was moved to frameworks/native/libs/binder.