From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: linux-next: add utrace tree Date: Tue, 26 Jan 2010 14:58:50 +0100 Message-ID: <20100126135849.GC1764@ucw.cz> References: <20100120072925.GA11395@elte.hu> <20100121013822.28781960.sfr@canb.auug.org.au> <20100122111747.3c224dfd.sfr@canb.auug.org.au> <20100121163004.8779bd69.akpm@linux-foundation.org> <20100121163145.7e958c3f.akpm@linux-foundation.org> <20100122005147.GD22003@redhat.com> <20100121170541.7425ff10.akpm@linux-foundation.org> <20100122052139.GA20532@in.ibm.com> <18867.1264167798@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:34623 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751027Ab0AZN7T (ORCPT ); Tue, 26 Jan 2010 08:59:19 -0500 Content-Disposition: inline In-Reply-To: <18867.1264167798@localhost> Sender: linux-next-owner@vger.kernel.org List-ID: To: Valdis.Kletnieks@vt.edu Cc: ananth@in.ibm.com, Linus Torvalds , Andrew Morton , "Frank Ch. Eigler" , Stephen Rothwell , Ingo Molnar , Peter Zijlstra , Peter Zijlstra , Fr??d??ric Weisbecker , LKML , Steven Rostedt , Arnaldo Carvalho de Melo , linux-next@vger.kernel.org, "H. Peter Anvin" , utrace-devel@redhat.com, Thomas Gleixner On Fri 2010-01-22 08:43:18, Valdis.Kletnieks@vt.edu wrote: > On Fri, 22 Jan 2010 10:51:39 +0530, Ananth N Mavinakayanahalli said: > > > FWIW, Oleg's implementation of ptrace over utrace is 100% compatible > > with legacy ptrace; gdb testsuite indicates that > > (http://lkml.org/lkml/2009/12/21/98). > > No, that only proves it's compatible enough for gdb to not care. The problem > is all those *other* packages that abuse ptrace in totally crackhead ways. > > (No, I can't name them - but ptrace is the sort of interface that almost > encourages its use for things somewhere between crackhead and mad-scientist, > so they're almost certainly out there.. WAY out there.. :) strace, subterfugue, ltrace, ...? Plus various homegrown sandboxing tools... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html