From patchwork Fri Apr  1 18:20:13 2011
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Georg-Johann Lay <avr@gjlay.de>
X-Patchwork-Id: 89318
Return-Path: 
 <gcc-patches-return-288467-incoming=patchwork.ozlabs.org@gcc.gnu.org>
X-Original-To: incoming@patchwork.ozlabs.org
Delivered-To: patchwork-incoming@bilbo.ozlabs.org
Received: from sourceware.org (server1.sourceware.org [209.132.180.131])
	by ozlabs.org (Postfix) with SMTP id 70715B6F75
	for <incoming@patchwork.ozlabs.org>;
	Sat,  2 Apr 2011 05:20:41 +1100 (EST)
Received: (qmail 6717 invoked by alias); 1 Apr 2011 18:20:39 -0000
Received: (qmail 6709 invoked by uid 22791); 1 Apr 2011 18:20:38 -0000
X-SWARE-Spam-Status: No, hits=-1.6 required=5.0	tests=AWL, BAYES_00,
	DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_NONE
X-Spam-Check-By: sourceware.org
Received: from mo-p00-ob.rzone.de (HELO mo-p00-ob.rzone.de) (81.169.146.162)
	by sourceware.org (qpsmtpd/0.43rc1) with ESMTP;
	Fri, 01 Apr 2011 18:20:31 +0000
X-RZG-AUTH: :LXoWVUeid/7A29J/hMvvT2k715jHQaJercGObUOFkj18odoYNahU4Q==
X-RZG-CLASS-ID: mo00
Received: from [192.168.0.22]	(business-188-111-022-002.static.arcor-ip.net
	[188.111.22.2])	by post.strato.de (klopstock mo64) (RZmta
	25.8)	with ESMTPA id t05ad6n31G9uib ;
	Fri, 1 Apr 2011 20:20:13 +0200 (MEST)
Message-ID: <4D96175D.8080203@gjlay.de>
Date: Fri, 01 Apr 2011 20:20:13 +0200
From: Georg-Johann Lay <avr@gjlay.de>
User-Agent: Thunderbird 2.0.0.24 (X11/20100302)
MIME-Version: 1.0
To: gcc-patches@gcc.gnu.org
CC: Denis Chertykov <chertykov@gmail.com>, Anatoly Sokolov <aesok@post.ru>,
	Eric Weddington <eric.weddington@atmel.com>
Subject: [Patch,AVR]: Fix PR45263
X-IsSubscribed: yes
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Unsubscribe: 
 <mailto:gcc-patches-unsubscribe-incoming=patchwork.ozlabs.org@gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
Delivered-To: mailing list gcc-patches@gcc.gnu.org

This is straight forward fix for PR45263 (R20 clobbered by
constructor/destructor).

Using call-saved register like R15 is undesired because upcoming
ATtiny10 architecture.

2011-04-01  Georg-Johann Lay  <avr@gjlay.de>

	PR target/45263
	* config/avr/libgcc.S (__do_global_ctors, __do_global_dtors): 		Save
R20 around calls of __tablejump_elpm__

Index: config/avr/libgcc.S
===================================================================
--- config/avr/libgcc.S	(Revision 171824)
+++ config/avr/libgcc.S	(Arbeitskopie)
@@ -802,7 +802,9 @@ __do_global_ctors:
 	mov_h	r31, r29
 	mov_l	r30, r28
 	out     __RAMPZ__, r20
+	push	r20
 	XCALL	__tablejump_elpm__
+	pop	r20
 .L__do_global_ctors_start:
 	cpi	r28, lo8(__ctors_start)
 	cpc	r29, r17
@@ -843,7 +845,9 @@ __do_global_dtors:
 	mov_h	r31, r29
 	mov_l	r30, r28
 	out     __RAMPZ__, r20
+	push	r20
 	XCALL	__tablejump_elpm__
+	pop	r20
 .L__do_global_dtors_start:
 	cpi	r28, lo8(__dtors_end)
 	cpc	r29, r17