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Re: Thread model

From: Thomas Bushnell BSG
Subject: Re: Thread model
Date: Wed, 19 Mar 2008 18:35:56 -0400

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?

Or perhaps they are saving the stack frames...


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