Emacs for Workshop?

[Marshall, Simon]

I use Sun Workshop quite a lot; it's a graphical interface on top of dbx
that can use XEmacs or Emacs as the source file editor.  It works very
well with XEmacs; within XEmacs you get buttons for major actions such
as setting breakpoints (breakpoints are shown in the margin) and moving
up and down stack frames.

The question is, although this might be the wrong place to ask, is
anyone aware of a package that supports Emacs for Sun Workshop with
these sorts of features?  The Emacs-21 margin and toolbar seem made for
it.