Re: On-disk kernel hanging after install

[Michael <macallan%netbsd.org@localhost>]

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Hello,

On Apr 10, 2011, at 3:36 AM, Julio Merino wrote:

> On Sun, Apr 10, 2011 at 2:35 AM, Michael <macallan%netbsd.org@localhost> wrote:
> > You can just make an iso9660 image with only ofwboot.xcf in it, dd  
> > it to the
> > first sectors of the disk, then disklabel it ( don't bother with  
> > pdisk,
> > ofwboot.xcf knows how to find and read disklabels ). Make sure your
> > partitions don't overwrite the iso. We should probably teach  
> > sysinst how to
> > do that since this method should work on both old and new world macs.
> > A suitable iso is here:
> > ftp://ftp.netbsd.org/pub/NetBSD/misc/macallan/macppc/ofwboot.iso
>
> Very interesting approach.  (Is it possible to re-dd the iso
> afterwards, or will it override the disklabel?  I have no idea where
> the disklabel is physically stored.)

Probably will, although I'm not quite sure where exactly it is either.

> The disklabel I created is something like:
>
> a: start after b, run for the rest of the disk, type 4.2BSD
> b: start at 8M, run for 2G, type swap
>
> Unfortunately, I get the exact same results with your mechanism.  This
> time, I could copy the error message that appeared right after
> ofwboot.xcf booted the kernel:
>
> -----
> No ADB support present, assuming USB keyboard
> trap: kernel ISI by 0xff847288 (SRR1 0x40003030), lr: 0x1001bc
> panic: trap
> Stopped
> -----
>
> This happened right after install, with a GENERIC kernel.  I also
> tried to copy the netbsd kernel from cd0a to wd0a (FFSv2, -o log) and
> boot off of that.  Same problem, which makes me amused because it is
> the same kernel booting just fine from the cd!
>
> The only explanation I can imagine is that ofwboot.xcf is somehow
> loading corrupt data from ffsv2 and misplacing the kernel in memory.
> (That said, a quick test formatting wd0a with ffsv1 and placing a
> lonely kernel in it also failed.)  Any other hypothesis?

Damn, I was going to suggest to try ffsv1, I don't know if anyone ever  
made ffsv2 work with the macppc boot block.

> I've been doing more attempts at formatting with ffsv1 and even using
> a 5.1 binary set. No luck; exact same problem.
>
> (Back when I installed this for the first time, it was 5.0_BETA IIRC.
> I had some issues with the GENERIC kernel, but none with the boot
> loading proces...)

Any chance to try a kernel from - say - 2 weeks ago? Or a 5.1 kernel?
It's been a few weeks since I messed with macppc kernels, I've been  
busy in Sun and SGI land lately.

have fun
Michael

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