Re: Thread model

[Neal H. Walfield]

At Wed, 19 Mar 2008 18:35:56 -0400,
Thomas Bushnell BSG wrote:
> On Wed, 2008-03-19 at 17:56 +0100, Neal H. Walfield wrote:
> > At Wed, 19 Mar 2008 09:58:57 -0400,
> > Thomas Bushnell BSG wrote:
> > > And throwing a big wrinkle into all that is that many architectures do
> > > not make it *possible* for users to handle page faults.  The processor
> > > dumps a load of crap on the stack, and the kernel must preserve it
> > > carefully and then return the fault.  It is very hard to encapsulate
> > > that so that it can be stored and restored by users without keeping the
> > > whole stack around.
> > 
> > L4 was ported to a large number of architectures; it can't be that
> > hard.
> 
> Sparc or i386?

I don't understand the question.  [1] shows the architectures that
Pistachio currently supports.

According to [2], there was at least once a Sparc port in the making.

Neal


[1] http://l4ka.org/projects/pistachio/
[2] https://lists.ira.uni-karlsruhe.de/pipermail/l4ka/2004-August/001020.html