Wine and Valgrind / handling SIGILL

[Julian Seward]

Hi Sebastian,

> The Valgrind bugtracker also contains three patches I proposed back then. I
> was hoping that this would speed up the process of getting this fixed, but
> unfortunately it didn't help much. At many places Valgrind does not yet
> handle signal registers correctly and doesn't complain - except here, which
> is really unfortunate because even ignoring would be sufficient to make Wine
> happy.

Sorry this fell through the cracks.  One underlying problem is that, some
time back in 2003, I learnt just enough about x86 segment stuff to hack up
what's currently in Valgrind, and then promptly forgot about it.  So I'm
not in much of a position to make an informed judgement now.

That said .. I would be OK with a partial fix which improves Valgrind's
SS handling enough to make Wine work, so long as it doesn't create a
situation where other cases are silently handled incorrectly.  That is,
if the fix only moves forwards on the correctness scale, and doesn't
introduce any regressions.

On rereading https://bugs.kde.org/show_bug.cgi?id=344139#c1 I see that you
have a candidate patch (http://ix.io/gKt, "Correctly handle the SS prefix
when explicitly specified.") which appears to have the abovementioned
properties.  Is that correct?

J