Re: [PATCH] DW_AT_calling_convention support

[Daniel Jacobowitz <drow at mvista dot com>]

On Wed, Jul 10, 2002 at 01:40:58PM -0500, Jim Blandy wrote:
> 
> Petr Sorfa <petrs@caldera.com> writes:
> > > Okay, I'll look forward to the patch.
> > In a few minutes.
> > 
> > > Is checking the calling convention really the approved technique for
> > > recognizing a Fortran entry point in Dwarf 2?  Is it really the case
> > > that Fortran programs always only have one function with this calling
> > > convention?  Would your patch do something sensible if it found more
> > > than one?
> > Good question, the Dwarf standard V3 Draft 7 Page 44 says:
> > 
> > "The DW_CC_program value is intended to support Fortran main programs.
> > It is not intended as
> > a way of finding the entry address for the program."
> > 
> > So the answer is yes and no. But I think the patch is valid as it
> > determines not the entry point, but the main program. As far as I am
> > aware you can have only one PROGRAM entry per FORTRAN program. If there
> > is more than one found, the patch just uses the last read entry. I don't
> > think supporting a more intricate way would be much use (such as keeping
> > a list of DW_CC_program entries.)
> 
> What's the difference between the entry point and the main program?

The entry point is an implementation detail - like _start.  The main
program is in user code, main() or "program foo".

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer