qemu and chroot

[Erez D]

I am using centos 6 and  developing for an armel platform

i created a rootfs using multistrap/debbootstrap

i copied qemu-arm-static to rootfs/usr/bin/qemu-arm-static

and i was astonished that doing just 'chroot rootfs' worked, without
explicitly telling 'chroot' to use qemu-arm-static - somehow it decided
automatically to run everything under qemu-arm-static without me telling it
to.


after a restart of the server. rootfs does not work anymore automatically,
i get a "chroot: failed to run command `/bin/bash': Exec format error"
doing "chroot rootfs /usr/bin/qemu-arm-static /bin/bash" does chroot, but
i get : "bash: /bin/cat: cannot execute binary file" (although
rootfs/bin/cat is a perfectly ok armel binary, tested on the armel target).
i also checked the md5sum of the rootfs/qemu-arm-static binary, and it is ok

i mounted the rootfs on the armel target using nfs, and chrooted from the
target, and it works perfectly, meaning there is nothing wrong with the
rootfs filesystem

as it wonderously worked, now it wonerously  doesn't

tryed googleling for it , but still cant find how to make it work

any idea ?
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