From owner-cvs-src@FreeBSD.ORG  Tue Feb 20 18:10:13 2007
Return-Path: <owner-cvs-src@FreeBSD.ORG>
X-Original-To: cvs-src@FreeBSD.org
Delivered-To: cvs-src@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id C521B16AE91;
	Tue, 20 Feb 2007 18:10:13 +0000 (UTC)
	(envelope-from emaste@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [69.147.83.41])
	by mx1.freebsd.org (Postfix) with ESMTP id A08FD13C428;
	Tue, 20 Feb 2007 18:10:13 +0000 (UTC)
	(envelope-from emaste@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.6/8.13.6) with ESMTP id l1KIADWF086904;
	Tue, 20 Feb 2007 18:10:13 GMT
	(envelope-from emaste@repoman.freebsd.org)
Received: (from emaste@localhost)
	by repoman.freebsd.org (8.13.6/8.13.4/Submit) id l1KIADGh086903;
	Tue, 20 Feb 2007 18:10:13 GMT (envelope-from emaste)
Message-Id: <200702201810.l1KIADGh086903@repoman.freebsd.org>
From: Ed Maste <emaste@FreeBSD.org>
Date: Tue, 20 Feb 2007 18:10:13 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/gnu/usr.bin/gdb/libgdb fbsd-threads.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 20 Feb 2007 18:10:13 -0000

emaste      2007-02-20 18:10:13 UTC

  FreeBSD src repository

  Modified files:
    gnu/usr.bin/gdb/libgdb fbsd-threads.c 
  Log:
  Avoid writing uninitialized stack data into a thread's MMX/SSE state by
  first getting the current state with td_thr_getxmmregs_p.  Without this,
  debugging a threaded app that uses libthr resulted in kernel panics or
  spurious SIGFPEs for me.
  
  (As of revision 1.6, sys/i386/i386/ptrace_machdep.c masks off the
  reserved bits in the mxcsr register, which prevents the kernel panics.)
  
  Architectures without PT_GETXMMREGS are not affected.
  
  MFC after:      1 week
  
  Revision  Changes    Path
  1.16      +12 -7     src/gnu/usr.bin/gdb/libgdb/fbsd-threads.c