frame_id question

[Jim Blandy]

On 11/13/05, Daniel Jacobowitz <drow@false.org> wrote:
> > > Some functions don't need any stack space at all.  Such a function can
> > > even call other functions if it moves the return address to a
> > > callee-saved register while doing so.
>
> I was going to reply with that example, but I couldn't convince myself
> it was possible.  It'll clobber the value previously in that
> callee-saved register.  However, I know there is a case like this - I
> just can't think of it at the moment.

You're right.  Now I'm not sure it's possible either.  (Setting aside
dummy frames created by GDB.)