From what I can gather the only way to reasonably examine the disassembly
of a program in the early days of Unix was adb.  Is this true?  Was there a
way to easily produce a full disassembly?  I'll confess to being fairly
ignorant of adb use since I always had dbx or the equivalent available.
The first tool I'm aware of to purposefully/primarily produce a full
listing is MIPS dis (ca. 1986?) but there must have been something before
that for other systems, no?

-Henry