Re: [elysium-developers] User-level IRQ handling added

[Adam L. <ag...@li...>]

On Wed, Feb 16, 2000 at 07:37:10PM +0100, Kasper Verdich Lund wrote:
> Hi guys,
> 
> I've added user-level IRQ handling stuff to the Elysium kernel. The
> 'init' module shows how to hook the interrupt generated from an IRQ - in
> this particular case IRQ 1 (keyboard) - and I'll be implementing a
> keyboard driver in a few days. Before this week is over we'll have a
> primitive shell up and running :-)
> 
> We still need to work on PCT (protected control transfer) - anyone?

Well, I've got some free time coming up. I've got some other stuff to do but I'll take a look. I've lost my Insight CD (damm!) but can you explain how the upcalling works? I've only used TSS before.

popl %eax
popl %eax
movl %cr3,%eax
iret

I think that's the code (from memory), it sets up the page tables but does the iret pop stuff off the argument stack? And does that drop the privelage level?
AGL