How to get a crash dump with recursive panic?

[Darren Reed <darrenr%netbsd.org@localhost>]

In testing out ipfilter on sparc64, I see a bunch of "Alignment error"
messages like these:

Alignment error: pid=24522.1 comm=ipfstat dsfsr=00000000:00800001 
dsfar=ffffffff:fea0c252 isfsr=00000000:00808000 pc=10e3b0
Alignment error: pid=22537.1 comm=ipfstat dsfsr=00000000:00800001 
dsfar=ffffffff:fea02252 isfsr=00000000:00808000 pc=10e3b0
Alignment error: pid=6845.1 comm=ipfstat dsfsr=00000000:00800001 
dsfar=ffffffff:fea02252 isfsr=00000000:00808000 pc=10e3b0

Followed by a panic like this:

trap type 0x34: cpu 0, pc=109faac npc=109fab0 pstate=0x820006<PRIV,IE>
Skipping crash dump on recursive panic
panic: mem address not aligned
cpu0: Begin traceback...
cpu0: End traceback...
cpu1: shutting down
cpu0: rebooting

All that I can do is:
(gdb) x/i 0x109faac
   0x109faac <ipf_fixskip+44>:  ldx  [ %g4 + 0x20 ], %g4

Further tips anyone?

Darren