ttyp2:foo@hoge 5:52:15/040620(...bind9/work)> sudo gdb /etc/named/named.core
GNU gdb 5.0nb1
...(omitted)... This GDB was configured as "powerpc--netbsd"..."/etc/named/named.core": not in executable format: File format not recognized

(gdb) quit
ttyp2:foo@hoge 5:52:23/040620(...bind9/work)> ls -l /etc/named/named.core
-rw------- 1 root wheel 8880128 Jun 10 00:12 /etc/named/named.core
ttyp2:foo@hoge 5:52:30/040620(...bind9/work)> sudo file !$
sudo file /etc/named/named.core
/etc/named/named.core: ELF 32-bit MSB core file, PowerPC or cisco 4500, version 1 (SYSV), NetBSD-style, from 'named' (signal 6)
ttyp2:foo@hoge 5:52:44/040620(...bind9/work)>