x86 single-step issues

[Roland McGrath]

> On Wed, 09 Jul 2008 23:28:55 +0200, Roland McGrath wrote:
> > I have some more fixes in the x86 bowels about ready to send upstream.
> > >From the status quo upstream, my changes get FAIL->PASS for
> > step-jump-cont-strict (32 & 64), step-through-sigret (32).
> 
> Even step-jump-cont-strict, great.

Yes, 0+0 failures (4+6 skipped) in 'make check' as stock in cvs today.

It's been a while since I actually looked at that test case.  I think it
was cured by a patch I have labelled "block-step fix" that fixes some of
the "who set TF" bookkeeping.  There are still a number of arcane scenarios
involving user-sets-own-TF where we know that we don't notice everything
perfectly, and I don't think I reduced that number from its past minimum.


Thanks,
Roland