Sebastian Reichel <sre@xxxxxxxxxx> writes:
> Hi,
>
> 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. But I searched for the byte combination
> anyway and found it in libc.so:
>
> 32ecc: 9cd0 ldr r4, [sp, #832] ; 0x340
> 32ece: fffe e92d vtbl.8 d30, {d14-d15}, d29
>
> 00032ed0 <_IO_vfprintf>:
> 32ed0: e92d 4ff0 stmdb sp!, {r4, r5, r6, r7, r8, r9, sl, fp, lr}
> 32ed4: ed2d 8b02 vpush {d8}
Your userland appears to be built with Thumb2. Make sure CONFIG_THUMB
is enabled in your kernel.
--
Måns Rullgård
mans@xxxxxxxxx
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