Subject: making a netbsd kernel look like a linux kernel? [was: Re: non-Linux
To: None <firstname.lastname@example.org>
From: Hubert Feyrer <email@example.com>
Date: 07/07/2003 18:36:41
I asked the Xbox linux folks (whom I'll probably meet next weekend) about
booting non-linux on an Xbox, see below. Question is now (for the non-mbr
solution), is there an easy way to make a NetBSD kernel look like a Linux
kernel that a bootloader expecting a Linux kernel can boot?
Of course the mbr approach looks much nicer to me, but that would need
some work (that I won't/can't do).
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* Basics -> http://www.onlamp.com/pub/a/onlamp/2001/05/24/ipv6_tutorial.html
* Setup -> http://www.onlamp.com/pub/a/onlamp/2001/06/01/ipv6_tutorial.html
Of course with your #1 IPv6 ready operating system -> http://www.NetBSD.org/
---------- Forwarded message ----------
Date: Mon, 7 Jul 2003 00:58:39 +0200
From: Michael Steil <firstname.lastname@example.org>
To: Hubert Feyrer <email@example.com>
Subject: Re: non-Linux on XBox?
> I saw your will be at the Karlsruhe Linuxtag, doing Linux on Xbox mods
> installs. What I wonder is, is it possible to put anything else than
> on the machine? I'd be most interested if it works with NetBSD. :)
Please, please do the port. :-)
> How do you modify the machine to boot - will it do a "normal" mbr boot,
> reading 512 bytes and executing whatever's there? Or do you write a
> special bootloader into the BIOS/ROM/whatever that's equivalent to
> lilo/grub and will only load Linux?
> I'll probably be in Karlsruhe too (at least on saturday and sunday),
> maybe we can talk about NetBSD on Xbox there if you want. (I don't have
> any Xbox experience... :)
Cool! I'd love to talk about it!
There are two ways to boot Linux:
* Hacked MS ROM
We have a Linux bootloader that looks like a game executable and gets
loaded on an Xbox with a hacked ROM so that the kernel doesn't care
about the RSA signature. This bootloader is quite similar to the old
DOS Loadlin: Is escapes the Xbox kernel environment and jumps into the
* Replacement ROM
Our ROM initializes the machine, loads a Linux kernel from a FATX,
ISO9660 or ReiserFS filesystem and runs it.
The two bootloaders have been integrated into a single bootloader that
can be compiled either way.
You can easily run any other kernel if you either convert the kernel
into Linux kernel format (easy) or by creating a plugin that looks like
a Linux kernel and contains a NetBSD bootloader...
We don't have MBR boot at the moment, but we do have code that *should*
do it in the CVS, but it is unmaintained. This might be an easier way,
you might want to work on this one, too.
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Content preview: > I saw your will be at the Karlsruhe Linuxtag, doing
Linux on Xbox mods > and > installs. What I wonder is, is it possible
to put anything else than > Linux > on the machine? I'd be most
interested if it works with NetBSD. :) [...]
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