Difference between revisions of "Arm qemu chroot"
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(Created page with " 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...") |
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We need to mount the image using loopback, but since the image contains multiple partitions, we require kpartx | We need to mount the image using loopback, but since the image contains multiple partitions, we require kpartx | ||
| − | |||
| − | sudo 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 | + | $ 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. | 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. | ||
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kpartx -d -v 2012-12-16-wheezy-raspbian.img | 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 | ||
Latest revision as of 13:19, 22 June 2015
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