This doesn't do anything interesting yet, but soon it will take over system call duties from the x86 linux processes. Change-Id: Ic126fc80def0b458de51d3a9c96120c58e5a75ad Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33902 Reviewed-by: Gabe Black <gabe.black@gmail.com> Reviewed-by: Alexandru Duțu <alexandru.dutu@amd.com> Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>