Here the results of running: [nldudok1@quark incoming]$ /var/ftp/incoming/psim/freebsd/bin/powerpc-netbsd-run -f /var/ftp/incoming/trees/cagney_tree_real /var/ftp/incoming/netbsd_ofppc_ca gney_half_stripped Copyright (c) 1996, 1997, 1998, 1999, 2000 The NetBSD Foundation, Inc. All rights reserved.
Try downloading the current GDB sources (http://sources.redhat.com/gdb/current/ and then run things under GDB:
(gdb) file netbsd.gdb (gdb) target sim -f tree (gdb) runWhen the trap is hit, type cntrl-c and you should have all the normal GDB facilities available.
Andrew