Derek,

I may be wrong about NetBSD as I don't know too much about the boot 
loader on this system, but in general, OF code is been unmapped from 
memory (by calling quiesce method) and therefore unaccessible as soon as 
it has been used to do the bootstrap job. This I get not so much for 
saving memory but ultimately for security purpose.

LdS

On Sunday, December 30, 2001, at 08:23 AM, Derek Peschel wrote:

> Probably I mentioned this... I got the idea that "halt" should return
> to an OF prompt instead of just looping.  But I realized that calling 
> the
> cpu_reboot function is not the cleanest way to do that -- I want to 
> return
> from a series of nested functions (ultimately reaching the boot loader,
> which has an "OF_exit" statement following the "chain" statement that
> transfers control to the kernel).
>
> Is the kernel designed to be tortured in this way?  Otherwise I'd have
> to do something even nastier (which I wouldn't understand anyway).
>
> The other issue is that (AIUI) OF_exit should be called exactly
> as many times as OF_enter is.  So I'd need to track down all the exits
> and enters.  Is anyone using another boot loader besides ofwboot?
>
> -- Derek