Illegal instruction errors under XEN3_DOM0 on -CURRENT

[Dustin Marquess <dmarquess%gmail.com@localhost>]

I've been playing with a PC Engines apu4d4 box.  Installed -CURRENT
from the nycdn builds, and everything works great.

I installed the xenkernel411 and xentools411 packages, copied xen.gz
to /, and added to boot.cfg:

menu=Xen:load /netbsd-XEN3_DOM0.gz console=pc;multiboot /xen.gz
dom0_mem=512M console=com1 com1=115200,8n1 dom0_max_vcpus=1

The Xen kernel boots fine and then the NetBSD dom0 starts.  However,
just about everything illegal instruction dumps:

[   3.5201899] kern.module.path=/stand/amd64-xen/9.99.56/modules
Mon Apr 20 01:15:00 UTC 2020
[1]   Illegal instruction     /bin/sh -c "ps -p \$\$ -o ppid="
...
Starting dhcpcd.
dhcpcd_fork_cb: truncated read 0 (expected 4)
/etc/rc.d/dhcpcd exited with code 1
Building databases: dev[1]   Illegal instruction (core dumped) "${@}"
, dev[1]   Illegal instruction (core dumped) "${@}"
...
Mounting all file systems...
mount: /var/shm: Illegal instruction
/etc/rc.d/mountall exited with code 1
...
Starting ntpd.
[1]   Illegal instruction (core dumped) RC_PID= _rc_pid=
_rc_original_stdout_fd= _rc_o...
/etc/rc.d/ntpd exited with code 1
...
Starting sshd.
[1]   Illegal instruction (core dumped) RC_PID= _rc_pid=
_rc_original_stdout_fd= _rc_o...
/etc/rc.d/sshd exited with code 1
[1]   Illegal instruction (core dumped) awk "/^sendmail[
\t]/{print\$2}" /etc/mailer.conf
Apr 20 01:15:15 apu4 init: fatal signal: Illegal instruction
[  48.1203201] panic: init died (signal 0, exit 4)
[  48.1203201] cpu0: Begin traceback...
[  48.1203201] vpanic() at netbsd:vpanic+0x146
[  48.1203201] snprintf() at netbsd:snprintf
[  48.1203201] exit1() at netbsd:exit1+0x50b
[  48.1203201] sys_exit() at netbsd:sys_exit+0x3d
[  48.1301288] syscall() at netbsd:syscall+0x9c
[  48.1301288] --- syscall (number 1) ---

However booting the GENERIC kernel again works just fine.  This is
from the same build, although I've tried DOM0 kernels from the last
few days from nycdn.

Any idea?

Thanks!
-Dustin