From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751321AbVH2VYz (ORCPT ); Mon, 29 Aug 2005 17:24:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751316AbVH2VYk (ORCPT ); Mon, 29 Aug 2005 17:24:40 -0400 Received: from ns2.suse.de ([195.135.220.15]:62409 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S1751298AbVH2VXl (ORCPT ); Mon, 29 Aug 2005 17:23:41 -0400 To: Tom Rini Cc: linux-kernel@vger.kernel.org Subject: Re: [patch 16/16] Add hardware breakpoint support for i386 References: <1.2982005.trini@kernel.crashing.org> From: Andi Kleen Date: 29 Aug 2005 23:23:39 +0200 In-Reply-To: Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Tom Rini writes: > This adds hardware breakpoint support for i386. This is not as well tested as > software breakpoints, but in some minimal testing appears to be functional. This really would need so coordination with user space using them. Otherwise it'll be quite unreliable because any user program can break it. Long ago (in 2.4 time frame) there used to be a IBM patch floating around to reserve them globally and user space to use specific ones. I guess something like that would be needed again. -Andi