From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <cgen-return-2509-listarch-cgen=sources.redhat.com@sourceware.org>
Received: (qmail 23574 invoked by alias); 12 Sep 2011 16:38:45 -0000
Received: (qmail 23562 invoked by uid 22791); 12 Sep 2011 16:38:44 -0000
X-SWARE-Spam-Status: No, hits=-6.5 required=5.0	tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,SPF_HELO_PASS
X-Spam-Check-By: sourceware.org
Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 12 Sep 2011 16:38:23 +0000
Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22])	by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p8CGcM5p013255	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK);	Mon, 12 Sep 2011 12:38:22 -0400
Received: from fche.csb (vpn-9-29.rdu.redhat.com [10.11.9.29])	by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id p8CGcMd9006283;	Mon, 12 Sep 2011 12:38:22 -0400
Received: by fche.csb (Postfix, from userid 2569)	id BC2ED5813C; Mon, 12 Sep 2011 12:38:21 -0400 (EDT)
Date: Mon, 12 Sep 2011 16:38:00 -0000
From: "Frank Ch. Eigler" <fche@redhat.com>
To: Aurelien Buhrig <aurelien.buhrig.gcc@gmail.com>
Cc: cgen <cgen@sourceware.org>
Subject: Re: Complex relocs and RELOC_IMPLIES_OVERFLOW attr
Message-ID: <20110912163821.GD1596@redhat.com>
References: <CAJ-J9_Uua-MVWnJ5cZTFWyvGsTJAzCvxeA4D9budRFub_qy7Yw@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAJ-J9_Uua-MVWnJ5cZTFWyvGsTJAzCvxeA4D9budRFub_qy7Yw@mail.gmail.com>
User-Agent: Mutt/1.4.2.2i
X-IsSubscribed: yes
Mailing-List: contact cgen-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <cgen.sourceware.org>
List-Subscribe: <mailto:cgen-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/cgen/>
List-Post: <mailto:cgen@sourceware.org>
List-Help: <mailto:cgen-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: cgen-owner@sourceware.org
X-SW-Source: 2011-q3/txt/msg00014.txt.bz2

Hi -

> I've defined OBJ_COMPLEX_RELC macro to enable complex relocations
> (from mep port) in my cpu port which seems to work well.
> But for gas to compile, the RELOC_IMPLIES_OVERFLOW attr must be
> defined in the cpu file (only in mep-core.cpu till now). [...]

I can't explain why it's done in the present way (using a generated
symbol rather than a hard-coded one); maybe because cgen .cpu-level
symbols cannot normally refer to normal C ones.

> are the complex relocs in cgen a very experimental feature we
> shouldn't use ?

They are done, working as far as I know.  However, they are not used
much: their capability is not needed or just not appreciated widely.


- FChE