define modules
	set $h = module_list
	set $e = $h->tqh_first
	while ($e != 0)
		if ($e->mod_kobj != 0)
			printf "module %s\t0x%016x-0x%016x\n", \
			    $e->mod_info.mi_name, \
			    $e->mod_kobj->ko_address, \
			    $e->mod_kobj->ko_address + $e->mod_kobj->ko_size
		else
			printf "module %s\n", \
			    $e->mod_info.mi_name
		end
		set $e = $e->mod_chain.tqe_next
	end
end