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