1OPTIONS/show_space optional show_space 2OPTIONS/gdb optional gdb 3OPTIONS/iplmeas optional iplmeas 4 5 6bsd/dev/i386/conf.c standard 7bsd/dev/i386/cons.c standard 8bsd/dev/i386/mem.c standard 9bsd/dev/i386/km.c standard 10bsd/dev/i386/kern_machdep.c standard 11bsd/dev/i386/memmove.c standard 12bsd/dev/i386/stubs.c standard 13bsd/dev/i386/lock_stubs.c standard 14bsd/dev/i386/sysctl.c standard 15bsd/dev/i386/unix_signal.c standard 16 17 18bsd/kern/bsd_stubs.c standard 19bsd/netinet/in_cksum.c standard 20 21