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From: Lucretia <laguest9000@googlemail.com>
Newsgroups: comp.lang.ada
Subject: Re: gnat on debian arm
Date: Wed, 25 Apr 2012 09:03:11 -0700 (PDT)
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Date: 2012-04-25T09:03:11-07:00
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On Wednesday, April 25, 2012 4:48:52 PM UTC+1, Ludovic Brenta wrote:
> Lucretia wrote on comp.lang.ada:
> > tonyg wrote:
> >> Does anyone know if gnat is fully ported to debian ARM and its
> >> status?
> > 
> > Well, yeah, but no, but, is the best answer.
> > 
> > Debian ARM is actually arm-eabi, The current ARM GNAT's exception
> > handling uses SJLJ which is not part of the EABI standard; the
> > standard uses ZCX in DWARF2 tables, which has not been ported to
> > ARM yet, I've tried and got stuck/confused.
> 
> IIUC, that means that pure Ada programs work perfectly well but that
> exceptions cannot cross language boundaries, i.e. if your Ada program
> uses some C++ library that raises exceptions, then you cannot handle
> the exception in Ada?  Big deal.

It'll be slower than ZCX as well, that is a big deal.

> Otherwise, could you please elaborate on what you mean by
> "stuck/confused"?

Ever looked at the exception code? Understand the exception tables? Nope, me neither.

I posted a patch to gcc ml with my progress a while back, it works to a point, but there needs to be code to set up the actual ARM exception also. I just got confused with it all tbh.

Luke.