https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63534
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- For -fsplit-stack you are right, __morestack seems to have hidden visibility, so even if gcc emits call __morestack@plt, the linker should transform that into a direct call __morestack which doesn't need %ebx set up. Profiling -fpic code would still remain broken though.
