[PATCH] DW_AT_calling_convention support
Daniel Jacobowitz
drow@mvista.com
Wed Jul 10 11:49:00 GMT 2002
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
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