Decoding dbx symbol table information?

[Mariano Fernandez]

Does anyone know where to find a description of the format for the additional symbol table information provided for dbx when compiling with cc and the -g 
option. I have found a description of the standard a.out file in Sun's documentation, but standard symbol table only includes pointers to structures
and no information about their sizes or sub fields. I need this information in
order to write a debugger for a an experimental machine, here at Brown.

I would appreciate any help as to where to look. 

Thanks.

Mariano Fernandez
mgf at lems.brown.edu