Re: Booting homebrew ELF kernel on NewWorld OpenFirmware 3.0?

[Andrei Warkentin]

Thanks for your help. Right now I've gotten to the point where I can  
print ``hello world'' and exit back to OpenFirmware.
It is interesting though that I cannot ``boot'' it again (or for that  
matter launch BootX and procede back into OS X) until I reboot the  
machine.
When I boot my own kernel again I get a CLAIM Failed. When I boot  
BootX I get ``illegal instruction executed``. As far as I understand,  
it is because OF CLAIMed the memory area where it was loading my  
image, and after my kernel quit, that area was still CLAIMed by OF,  
so it couldn't CLAIM it again. Is there some way of convincing OF to  
free up the memory it just gobbled up, after my kernel had exited?

Thanks again.

On Oct 10, 2005, at 3:08 AM, Olaf Hering wrote:

>  On Sun, Oct 09, Andrei Warkentin wrote:
>
>
> > I trying to cobble together a simple Hello World ``kernel'' on the
> > mac, and have a question concerning the booting specifics. I
> > understand that OF 3.0 groks ELF, but the ELF file should contain
> > some special information in the note section (and have the PT_NOTE
> > thing). This special information entails the values for load-base and
> > real-base (among other things) that are to be used. Here is where I
> > become confused.
>
> Noone except IBM CHRP cares about the PT_NOTE.
> Proof: yaboot doesnt have one, and yaboot works fine for everyone.
>
> --
> short story of a lazy sysadmin:
>  alias appserv=wotan
>
>
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