From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935345AbXGYT2d (ORCPT ); Wed, 25 Jul 2007 15:28:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759659AbXGYT2Z (ORCPT ); Wed, 25 Jul 2007 15:28:25 -0400 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:59826 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753453AbXGYT2X (ORCPT ); Wed, 25 Jul 2007 15:28:23 -0400 Date: Wed, 25 Jul 2007 12:28:22 -0700 (PDT) Message-Id: <20070725.122822.92554727.davem@davemloft.net> To: jeremy@goop.org Cc: torvalds@linux-foundation.org, hpa@zytor.com, kaos@ocs.com.au, xyzzy@speakeasy.org, viro@ftp.linux.org.uk, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: [PATCH][RFC] getting rid of stupid loop in BUG() From: David Miller In-Reply-To: <46A781A4.40103@goop.org> References: <20070724.232914.56812376.davem@davemloft.net> <46A781A4.40103@goop.org> X-Mailer: Mew version 5.1.52 on Emacs 21.4 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Jeremy Fitzhardinge Date: Wed, 25 Jul 2007 10:00:20 -0700 > No, not any more. The file and line info is out of line, in a separate > section, indexed by the ud2a's eip. The main problem with > __builtin_trap is that there's no certain way to get the actual ud2a eip > (ie, paste an asm label onto it). Yes, I tried very hard to accomplish this myself, it would be wonderful if it could be made to work. I tried tricks using __label__ in inline asm, everything. It would be workable if condition codes could be passed into inline asm statements somehow, or the address of the builtin_trap() could be reliably obtained.