On Thu, Feb 27, 2020 at 4:05 PM William Roberts <bill.c.roberts@xxxxxxxxx> wrote: > > On Thu, Feb 27, 2020 at 2:43 PM Ulrich Drepper <drepper@xxxxxxxxxx> wrote: > > The use of the hidden infrastructure is not just a means to reduce > > overhead in the form of PLTs. It also ensures that internals for the > > library don't leak out. > > Linker script? We just use a map file that has everything local except for what > we want to export. That just controls what is exported. The hidden_proto/hidden_def stuff is to ensure that when libselinux calls one of its own exported symbols, that symbol resolves to the actual libselinux implementation and not something provided by some other DSO earlier in the search path, which is otherwise possible.
