Re: Bug#464962: immediate crash on boot on TM5800

[H. Peter Anvin]

maximilian attems wrote:
> On Tue, Feb 12, 2008 at 01:14:04PM -0800, H. Peter Anvin wrote:
> > Are you sure that build matches the bug report?
>
> urrgs right sorry, the posted vmlinux is a newer 
> 2.6.24-git22 and not  Version: 2.6.24-3
>  
> > The EIP given falls inside the .data segment of that kernel, 
> > specifically inside the symbol init_task.
> >
> > 	-hpa
>
> will rebuild aboves.

Okay, the faulting instruction is the following:

c0383360:       0f 1f 40 00             nopl   0x0(%eax)

The Crusoe code morphing software apparently doesn't recognize these 
"long noops", and (presumably) the rest of the hinting NOOP group.  gcc 
didn't use to generate them, and Crusoe/Efficeon generally do not 
benefit from code alignment anyway.  I suspect the best thing to do is 
to use either a 586 kernel or build a dedicated Crusoe kernel without 
code alignment.

	-hpa

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