Date: Thu, 22 Jun 95 17:41:33 MDT From: terry@cs.weber.edu (Terry Lambert) To: regnauld@tetard.frmug.fr.net Cc: freebsd-bugs@freefall.cdrom.com Subject: Re: i386/541: Alternate Reset method by unmapping ALSO broken Message-ID: <9506222341.AA04029@cs.weber.edu> In-Reply-To: <199506222140.OAA27154@freefall.cdrom.com> from "regnauld@tetard.frmug.fr.net" at Jun 22, 95 02:40:01 pm
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> /* force a shutdown by unmapping entire address space ! */
> -> printf("Unmapping address space:");
> bzero((caddr_t) PTD, NBPG);
> -> printf(" Done.\n");
>
> /* "good night, sweet prince .... <THUNK!>" */
> -> printf("Pmap Update:");
> pmap_update();
> -> printf(" Done.\n");
>
> /* NOTREACHED */
> while(1);
>
> ---
>
> After recompiling a kernel and booting it, the result is this:
>
> Keyboard reset did not work, attempting CPU shutdown
> Unmapping address space:
>
> ... and nothing more.
>
> Obviously bzero((caddr_t) PTD, NBPG) never makes it...
> (Pretty annoying, as I can't be away long if it crashes and
> attempts to reboot while I'm not around (like this summer...))
Theory: printf will fail with an unmapped address space.
Terry Lambert
terry@cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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