Re: [Xen-ia64-devel] Mini-OS registers and libgcc

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>]

Tristan Gingold, le Wed 12 Mar 2008 17:19:55 +0100, a écrit :
> On Wed, Feb 13, 2008 at 01:59:05PM +0100, Dietmar Hahn wrote:
> > comments are within the text!
> > 
> > Am Mittwoch, 13. Februar 2008 schrieb Samuel Thibault:
> > > Hello,
> > >
> > > Dietmar Hahn, le Wed 13 Feb 2008 11:53:59 +0100, a écrit :
> > > > Am Dienstag, 12. Februar 2008 schrieb Samuel Thibault:
> > > > > Is there a reason for using -mfixed-range=f2-f5,f12-f15,f32-f127
> > > > > when compiling Mini-OS?  Is it really needed since it doesn't
> > > > > have a user-land? (though I guess some support would be needed in
> > > > > switch_context for instance)
> > > >
> > > > To handle this in a clean way the trap_frame has to be expanded and some
> > > > fp registers have to stored/restored in trap handling.
> > >
> > > Ok. Would this be needed in order to be able to use libgcc.a?
> > 
> > No, both things are independent from each other.
> 
> Humm not sure: libgcc uses f12-f15.

Ok, so with the red zone of x86_64, that's another reason for not using
it :/

Samuel

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