From owner-svn-src-all@FreeBSD.ORG  Fri Dec 16 23:40:57 2011
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 46ED2106564A;
	Fri, 16 Dec 2011 23:40:57 +0000 (UTC)
	(envelope-from nwhitehorn@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 35BB78FC0A;
	Fri, 16 Dec 2011 23:40:57 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id pBGNevtD032530;
	Fri, 16 Dec 2011 23:40:57 GMT
	(envelope-from nwhitehorn@svn.freebsd.org)
Received: (from nwhitehorn@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id pBGNevbe032528;
	Fri, 16 Dec 2011 23:40:57 GMT
	(envelope-from nwhitehorn@svn.freebsd.org)
Message-Id: <201112162340.pBGNevbe032528@svn.freebsd.org>
From: Nathan Whitehorn <nwhitehorn@FreeBSD.org>
Date: Fri, 16 Dec 2011 23:40:57 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r228605 - head/sys/powerpc/aim
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 16 Dec 2011 23:40:57 -0000

Author: nwhitehorn
Date: Fri Dec 16 23:40:56 2011
New Revision: 228605
URL: http://svn.freebsd.org/changeset/base/228605

Log:
  Zero BSS on start, in case the ELF loader that started the kernel did not
  do this for us. This can happen on some embedded systems.
  
  Submitted by:	rpaulo

Modified:
  head/sys/powerpc/aim/locore32.S

Modified: head/sys/powerpc/aim/locore32.S
==============================================================================
--- head/sys/powerpc/aim/locore32.S	Fri Dec 16 23:15:11 2011	(r228604)
+++ head/sys/powerpc/aim/locore32.S	Fri Dec 16 23:40:56 2011	(r228605)
@@ -128,6 +128,17 @@ __start:
 	sync
 	isync
 
+	/* Zero bss, in case we were started by something unhelpful */
+	li	0,0
+	lis	8,_edata@ha
+	addi	8,8,_edata@l
+	lis	9,_end@ha
+	addi	9,9,_end@l
+2:	stw     0,0(8)
+	addi	8,8,4
+	cmplw	8,9
+	blt	2b
+	
 	/* Save the argument pointer and length */
 	mr	20,6
 	mr	21,7