Re: problem with "undefined instruction"

[Tony Lindgren <tony@atomide.com>]

* Sebastian Reichel <sre@debian.org> [110606 15:51]:
> On Sat, Apr 30, 2011 at 06:23:57PM +0200, Sebastian Reichel wrote:
> > I'm currently trying to get a mainline based kernel running on my pandaboard.
> > The problem is, that it's crashing very early during the init phase because of
> > "undefined instruction" exceptions:
> > 
> > [    1.867980] udevd (56): undefined instruction: pc=401e6ed4
> > [    1.874603] Code: 9cd0 fffe e92d 4ff0 (ed2d)
> > [    1.977752] modprobe (69): undefined instruction: pc=400c6ed4
> > [    1.977783] Code: 9cd0 fffe e92d 4ff0 (ed2d)
> > [    1.978240] init (1): undefined instruction: pc=40149ed4
> > [    1.978240] Code: 9cd0 fffe e92d 4ff0 (ed2d)
> > [    2.005706] Kernel panic - not syncing: Attempted to kill init!
> >
> > Exactly the same userland boots fine with the original 2.6.35 kernel, so it's
> > probably not the userland's fault.
> 
> I found the source of this problem. VFPv3 support is not working
> correctly when OMAP2 (and thus CPU_V6) is enabled in the kernel
> config.
> 
> I guess this should be mentioned in the kernel config (or fixed if
> possible).

This should be easy to fix now. Do you have a minimal test program that
triggers this?

Tony