Good news, sparc emulation with -nographic no longer core dumps.
The bad news, networking still fails:
....
SunLance: using auto-carrier-detection.
eth0: LANCE 52:54:00:12:34:56
Skipping already loaded module esp.
Setting up networking...done.
Setting up IP spoofing protection: rp_filter.
Configuring network interfaces...Internet Software Consortium DHCP
Client 2.0pl5
Copyright 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium.
All rights reserved.
Please contribute if you find this software useful.
For info, please visit http://www.isc.org/dhcp-contrib.html
LANCE unopened after 100 ticks, csr0=0004.
dcsr=a0061020
SIOCSIFFLAGS: Operation not permitted
Listening on LPF/eth0/52:54:00:12:34:56
Sending on LPF/eth0/52:54:00:12:34:56
Sending on Socket/fallback/fallback-net
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
send_packet: Network is down
receive_packet failed on eth0: Network is down
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7
send_packet: Network is down
....
-Nigel