https://bugs.winehq.org/show_bug.cgi?id=50773
--- Comment #4 from Erich E. Hoover erich.e.hoover@gmail.com --- (In reply to Martin Storsjö from comment #3)
... Ok, fair enough - if this one can't be practically implemented, the cases where it matters in the testsuite I'm trying to run can be skipped fairly easily.
It does look like BSD supports this, and Linux has a few patches (that have not been accepted) to try and support some aspects of it. So, I'd say this might be doable at some point - but it's unlikely we can support it right now.