Subtracing addr is only appropriate for position-dependent objects,
where vaddrbase would also be the same value. For position-independent
objects, like the VDSO (which we already assume due to setting vaddrbase
to 0), the segments start at 0, not addr.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D51924
Jessica Clarke
6118587172