I can't tell you why others don't do it, but OpenBSD has used a proper read-only rodata segment since long ago http://www.openbsd.org/papers/pacsec03/e/mgp00013

I can't tell you why others don't do it, but OpenBSD has used a proper read-only rodata segment since long ago http://www.openbsd.org/papers/pacsec03/e/mgp00013.html http://www.openbsd.org/papers/pacsec03/e/mgp00013.html