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Chroot_ARM64_Linux_Distro.md

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Chroot into ARMv8 64bit (AARCH64) distribution

This is for WSL2 only.

Ubuntu

Procedure

  • Install required packages:
sudo apt install \
build-essential \
binfmt-support \
daemonize \
libarchive-tools \
qemu-system \
qemu-user \
qemu-user-static \
gcc-aarch64-linux-gnu \
g++-aarch64-linux-gnu

  • Download server-cloudimg-arm64-wsl.rootfs.tar.gz from Ubuntu Cloud image.

  • Extract the tarball in a folder:

sudo bsdtar -xpf server-cloudimg-arm64-wsl.rootfs.tar.gz -C folder
  • Copy qemu static binary into that folder:
sudo cp /usr/bin/qemu-aarch64-static folder/usr/bin
  • Start systemd with daemonize:
sudo daemonize \
/usr/bin/unshare -fp --mount-proc \
/lib/systemd/systemd --system-unit=basic.target
  • Check if AARCH64 binfmt entry is present:
ls /proc/sys/fs/binfmt_misc/
  • Mount and chroot into the environment:
sudo mount -o bind /proc folder/proc
sudo mount -o bind /dev folder/dev
sudo chroot folder qemu-aarch64-static /bin/bash
  • In the chroot, delete /etc/resolv.conf file and write a name server to it.

ArchLinux

Name resolution does not work

Procedure

  • Install required packages:
sudo pacman -S --needed \
base-devel binutils git qemu qemu-arch-extra aarch64-linux-gnu-gcc
  • Compile and install qemu-arm-static package from AUR:
git clone https://aur.archlinux.org/qemu-arm-static.git
cd qemu-arm-static
makepkg -si
  • Download and extract ArchLinux AARCH64 tarball:
wget http://os.archlinuxarm.org/os/ArchLinuxARM-aarch64-latest.tar.gz
sudo bsdtar -xpf ArchLinuxARM-aarch64-latest.tar.gz -C folder
  • Copy qemu static binary into that folder:
sudo cp /usr/bin/qemu-aarch64-static folder/usr/bin
  • Register binfmt entries manually:
cat /usr/lib/binfmt.d/aarch64.conf | sudo tee /proc/sys/fs/binfmt_misc/register > /dev/null
cat /usr/lib/binfmt.d/arm.conf | sudo tee /proc/sys/fs/binfmt_misc/register > /dev/null
cat /usr/lib/binfmt.d/armeb.conf | sudo tee /proc/sys/fs/binfmt_misc/register > /dev/null
ls /proc/sys/fs/binfmt_misc/
  • Chroot into the environment:
sudo arch-chroot folder qemu-aarch64-static /bin/bash

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