From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [PATCH v8 5/8] seccomp: Add SECCOMP_RET_TRAP Date: Thu, 16 Feb 2012 13:23:47 -0800 Message-ID: <4F3D73E3.7070409@zytor.com> References: <1329422549-16407-1-git-send-email-wad@chromium.org> <1329422549-16407-5-git-send-email-wad@chromium.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-doc-owner@vger.kernel.org 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 List-Id: linux-arch.vger.kernel.org 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.