fasmtags is tags [1] file generator for fasm [2] (flat assembler, fasm1).

Unlike universal-ctags [3], fasmtags parses not source code but symbols file
generated from debug file generated from source.

[1] http://ctags.sourceforge.net/FORMAT
[2] https://flatassembler.net/
[3] https://ctags.io/

Example usage:
  $ fasm blah.asm -s blah.fas
  $ symbols blah.fas blah.sym       # symbols utility comes with fasm
  $ fasmtags.py blah.sym            # produces tags file
  $ vim blah.asm                    # enjoy!