%fs, %gs on AROS hosted

[Marcus Meissner]

On Wed, Nov 07, 2007 at 09:25:51PM +0100, Staf Verhaegen wrote:
> On Wed, 07 Nov 2007 08:37:34 +0100, Marcus Meissner  
> <marcus at jet.franken.de> wrote:
> 
> > On Tue, Nov 06, 2007 at 10:17:12PM +0100, Staf Verhaegen wrote:
> >> Hello wine developers,
> >>
> 
> > Win32 (and so Wine) uses %fs as the thread selector.
> >
> > It needs to stay constant over process switches (as in "saved") and the  
> > base
> > virtual address must be settable.
> >
> 
> But the use of %fs by wine does not seem to conflict in any way with a  
> possible usage of that segment register by the OS where wine is running  
> on. Or is there some OS specific code that is handling it ?

No, it does not conflict. Your syscall / scheduler entry/exit points
however need to take care to save/restore it correctly, otherwise
you get interesting crashes ;)

Ciao, Marcus