Foxy-Boxes

**Describe the bug** When using the full system simulation m5_switch_cpu_addr followed by m5_exit or m5_exit_addr causes either the simulation to segfault or the simulated program to segfault(One might also see...

Reason: https://www.intel.com/content/dam/develop/external/us/en/documents/335592-sdm-vol-4.pdf 2-30.