The setsym command copies the symbol table from a kernel file and stores it as data within the kernel, so that symmon can find it. After autoconfig has created /unix.install, apply the setsym command to it, as follows:
If this command returns an error message about "symbol table overflow," it means you have neglected to activate the debugging LDOPTS statement in /var/sysgen/irix.sm.#setsym /unix.install
Tip: You can use setsym with the -d option to generate a list of all symbols in the kernel being modified. The list is very long; direct it to a file for later reference. At this time, you may wish to create a link to the current, nondebugging kernel so you can retrieve it easily. You can also return to a nondebugging kernel by restoring the original irix.sm file and running autoconfig again.