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[solved] NSLU2: chroot causes "Exec format error"
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BlueShark
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Joined: 30 May 2005
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PostPosted: Mon Nov 12, 2007 10:01 am    Post subject: [solved] NSLU2: chroot causes "Exec format error" Reply with quote

I am trying to set up gentoo on a Linksys NSLU2. I followed this HowTo step by step. But when I try to chroot into the gentoo system, I always receive the same error:
Quote:
root@NSLU2:~# mount -o bind /dev/ /mnt/gentoo/dev/
root@NSLU2:~# mount -o bind /dev/pts /mnt/gentoo/dev/pts
root@NSLU2:~# mount -t proc none /mnt/gentoo/proc
root@NSLU2:~# cp /etc/resolv.conf /mnt/gentoo/etc/
root@NSLU2:~# chroot /mnt/gentoo/ /bin/bash
chroot: cannot execute /bin/bash: Exec format error


I have absolute no clue what went wrong. So for any idea I would be grateful.


Last edited by BlueShark on Mon Nov 19, 2007 6:22 pm; edited 1 time in total
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eccerr0r
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PostPosted: Mon Nov 12, 2007 3:22 pm    Post subject: Reply with quote

Usually 'exec format error' means the current platform doesn't understand the file as a proper executable. What does

file /mnt/gentoo/bin/bash

report? Did it get built as an x86 (or whatever host system you used) binary?
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BlueShark
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Joined: 30 May 2005
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Location: Mainz, Germany

PostPosted: Sun Nov 18, 2007 1:23 pm    Post subject: Reply with quote

Thank you for your quick answer. I didn't know the command file. It showed up, that the current kernel is MSB and the Gentoo files are LSB on the system.

Well, I created this post as an X-Post of this thread/post: http://forums.gentoo.org/viewtopic-p-4515305.html#4476242
Because this thread is a german thread and I got no reply for 4 days. My hope was to get an answer, since much more users speak english than german. Since I created this x-post I will keep both threads up to date and report my results and hopefully also a solution.
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BlueShark
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Joined: 30 May 2005
Posts: 62
Location: Mainz, Germany

PostPosted: Mon Nov 19, 2007 6:22 pm    Post subject: Reply with quote

Alright, after a while I figured something (trivial) out:

At http://www.slug-firmware.net are several Kernels available. For example SlugOS/LE 3.10 Beta (NSLU2) and SlugOS/BE 3.10 Beta (NSLU2). LE indicates little endian and BE big endian. Furthermore, the stage3 archives stage3-armeb-uclibc-softfloat-2005.1.tar.bz2 and stage3-arm-uclibc-softfloat-2005.1.tar.bz2 available. Here the eb denotes the big endian one. So if you mix big endian and little endian, you will receive the same error as I did.
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