Andrew Haley wrote:
> Brian Dessent writes:
> > Jonathan Kinsey wrote:
> >
> > > Thanks for the link, unfortunately it doesn't work _beginthread just
> > > calls _beginthreadex - unless there is a alignment argument I didn't see
> > > (I tried it anyway and no luck).
> > >
> > > If you read the end of the post at the link it says that it doesn't fix
> > > a SSE problem that someone was having - at least I'm not on my own...
> >
> > I did read that but I hoped it was someone having unrelated problems. I
> > guess it's not.
> >
> > So, neither CreateThread nor MSVCRT align the stack, so I guess you'll
> > have to do it yourself. You should be able to do this with something
> > like:
> >
> > asm __volatile__ ("andl $-16, %%esp" : : : "%esp");
> >
> > at the beginning of your thread function.
>
> Ouch. I don't think that would work.
>
> > You could probably do this in a wrapper-function that calls your
> > actual thread function too.
>
> That sounds like a much better idea, although it may well also be
> problematic.
>
> A pure assembly function that did the adjustment and called your
> actual thread function would be the best idea.
It does work in the simple test. I imagine it may cause problems with
stack over/under writes?
I'll try it in the actual code that caused the initial problem and see
what happens...
Jon
