Brian Dessent writes:
> Andrew Haley wrote:
>
> > > 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.
>
> It looked a little iffy to me too, but I copied it directly from mingw's
> crt1.c where it has this comment:
>
> /* Align the stack to 16 bytes for the sake of SSE ops in main
> or in functions inlined into main. */
I think that's a special case: it's written with carnal knowledge of
the state at the time. I guess the clobber of SP doesn't cause the
compiler to reload SP from BP+offset, but I don't know why it doesn't.
In any case, it's rather hairy. :-)
Andrew.
