Arm qemu chroot

apt-get install qemu-user-static

We need to mount the image using loopback, but since the image contains multiple partitions, we require kpartx

$ sudo kpartx -a -v 2012-12-16-wheezy-raspbian.img
add map loop0p1 (252:8): 0 114688 linear /dev/loop0 8192
add map loop0p2 (252:9): 0 5763072 linear /dev/loop0 122880  

mount /dev/mapper/loop0p2 /mnt/temp
cp /usr/bin/qemu-arm-static /mnt/temp/usr/bin
sudo mount -o bind /dev /mnt/temp/dev
sudo mount -o bind /proc /mnt/temp/proc
sudo mount -o bind /sys /mnt/temp/sys


This registers the static QEMU we copied as arm-interpreter to the kernel. The path specified needs to be the same on both your linux machine and the Raspberry Pi environment.

echo ':arm:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-arm-static:' > /proc/sys/fs/binfmt_misc/register

chroot /mnt/temp

Clean

umount /mnt/temp/dev umount /mnt/temp/proc umount /mnt/temp/sys umount /mnt/temp

kpartx -d -v 2012-12-16-wheezy-raspbian.img

source

http://sentryytech.blogspot.cz/2013/02/faster-compiling-on-emulated-raspberry.html

qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot  -append "root=/dev/sda2 panic=1 console=ttyAMA0" -hda /root/raspberian_gcc4_8_1.img  -redir tcp:5022::22 -nographic