There is a [http://wiki.qemu.org/Main_Page QEMU] userspace emulator available to execute AArch64 applications on a an x86_64 machine and kernel. This program interprets aarch64 binaries and translate translates operating system calls to the underlying x86_64 kernel, enabling many aarch64 binaries to be executed with good performance. However, because it does not emulate the full system, some capabilities are not available: in particular, debugging software such as gdb and strace will not work. This system works by installing a binfmt (binary format) handler for aarch64 binaries. When the kernel attempts to execute a binary, it will analyze the binary's signature data, and if it matches the aarch64 elf signature, the qemu userspace system is invoked as an interpreter for the binary. This approach works best when a directory tree of a complete aarch64 system is installed, and then chroot is used to make that the root of a new process; this allows the aarch64 binaries to easily use aarch64 shared object libraries (.so). The qemu binfmt handler/interpreter can be installed inside the aarch64 directory tree. Therefore, the two pieces that need to be installed are the directory tree, containing the aarch64 userspace files and interpreter, and the binfmt configuration file.

{{Admon/caution|Superuser access - Danger!|While in the chroot environment, you are a superuser. Although the chroot provides partial protection, it is still possible to cause '''major damage'''. Take care not to delete entries in the special mounts or perform other actions that would affect the host or other users.<br/><br />If you create a regular user within the chroot environment for safety, you can change to that user using the command <code>su ''username''</code>}}

{{Admon/important|Fedora 19|The tarball mentioned here contains the preliminary aarch64 version of Fedora 19. The library versions, etc. are very old -- some of the earliest Aarch64 ports. Please feel free to update the image and contribute an updated tarball!}} === On your home system:Xerxes ===

1. Unpack the archive in your home directory:  cd ; sudo tar xvf /public/qemu-linux-user-aarch64 2. To switch to arm64/aarch64 mode, type:  sudo chroot ~/arm64 {{Admon/tip|Alias Recommended|It's a good idea to create an alias (and additional sudoers entry) to simplify the transition to the arm64 chroot. Doing so is left as an exercise for the reader.}} === On your home system === 1. Obtain the files in the <code>/public/qemu-linux-user-aarch64</code> directory on AustraliaXerxes: <code>arm64.qemu-userspace.tgz</code> and <code>qemu-arm64.conf</code>