Aarch64 stand-alone application for Xen

[Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>]

Good day,

I am in the process of adding support for aarch64 to the xen-sys
crate[1].  The crate currently supports x86_64 and includes a
stand-alone "oxerun" application that can be used to validate
hypercalls.  My goal is to provide the same functionality on arm64.  I
am looking for a stand-alone aarch64 example, something like an "hello
world" to help me with the assembler startup code.

Many thanks for the consideration,
Mathieu

[1]. https://crates.io/crates/xen-sys