Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755960Ab2BPVYy (ORCPT ); Thu, 16 Feb 2012 16:24:54 -0500 Received: from terminus.zytor.com ([198.137.202.10]:34681 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750991Ab2BPVYw (ORCPT ); Thu, 16 Feb 2012 16:24:52 -0500 Message-ID: <4F3D73E3.7070409@zytor.com> Date: Thu, 16 Feb 2012 13:23:47 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20120131 Thunderbird/10.0 MIME-Version: 1.0 To: Markus Gutschke CC: Will Drewry , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.org, netdev@vger.kernel.org, x86@kernel.org, arnd@arndb.de, davem@davemloft.net, mingo@redhat.com, oleg@redhat.com, peterz@infradead.org, rdunlap@xenotime.net, mcgrathr@chromium.org, tglx@linutronix.de, luto@mit.edu, eparis@redhat.com, serge.hallyn@canonical.com, djm@mindrot.org, scarybeasts@gmail.com, indan@nul.nu, pmoore@redhat.com, akpm@linux-foundation.org, corbet@lwn.net, eric.dumazet@gmail.com, keescook@chromium.org Subject: Re: [PATCH v8 5/8] seccomp: Add SECCOMP_RET_TRAP References: <1329422549-16407-1-git-send-email-wad@chromium.org> <1329422549-16407-5-git-send-email-wad@chromium.org> In-Reply-To: X-Enigmail-Version: 1.3.5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 998 Lines: 25 On 02/16/2012 12:28 PM, Markus Gutschke wrote: > On Thu, Feb 16, 2012 at 12:02, Will Drewry wrote: >> Adds a new return value to seccomp filters that triggers a SIGTRAP to be delivered with the new TRAP_SECCOMP si_code. >> >> This allows in-process system call emulation -- including just specifying an errno or cleanly dumping core -- rather than just dying. > > SIGTRAP might not be the ideal choice of signal number, as it can make > it very difficult to debug the program in gdb. Other than that, I love > this feature. It'll significantly simplify the code that we have in > Chrome. > Sounds like SIGSYS to me. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/