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?