From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0692BC433E6 for ; Fri, 26 Feb 2021 17:28:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B729B60202 for ; Fri, 26 Feb 2021 17:28:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229566AbhBZR2i (ORCPT ); Fri, 26 Feb 2021 12:28:38 -0500 Received: from mga18.intel.com ([134.134.136.126]:11180 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229550AbhBZR2i (ORCPT ); Fri, 26 Feb 2021 12:28:38 -0500 IronPort-SDR: 2zxCUv5uB+jjCSt8qM7TlE5NP7TWIE8jPBHwqiIuKhf6vfC8U4qfKO/lN/VwilQbms+1noSqma cW1bL4LdE4Hw== X-IronPort-AV: E=McAfee;i="6000,8403,9907"; a="173587218" X-IronPort-AV: E=Sophos;i="5.81,209,1610438400"; d="scan'208";a="173587218" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Feb 2021 09:27:57 -0800 IronPort-SDR: RzmeFdSRfYABg3rHeDV/nLrSletEtkoodJaR+vOBewS610TzSt+PvJ7drhutuNAI8g+D86F2vm aZ9OvIWDf/mg== X-IronPort-AV: E=Sophos;i="5.81,209,1610438400"; d="scan'208";a="405052437" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Feb 2021 09:27:57 -0800 From: Yu-cheng Yu To: linux-man@vger.kernel.org Cc: Yu-cheng Yu Subject: [PATCH 0/2] sigaction.2: Updates for SEGV_CPERR Date: Fri, 26 Feb 2021 09:26:32 -0800 Message-Id: <20210226172634.26905-1-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Control-flow Enforcement [1] [2] introduces a new control-protection fault, which is triggered by a branch instruction (call, ret, or jmp) violating branch-enforcement rules. When the signal is delivered, si_code is set to SEGV_CPERR. Add the code to sigaction.2, and while at it, clarify when si_addr is set. [1] Intel 64 and IA-32 Architectures Software Developer's Manual: https://software.intel.com/en-us/download/intel-64-and-ia-32- architectures-sdm-combined-volumes-1-2a-2b-2c-2d-3a-3b-3c-3d-and-4 [2] CET Shadow Stack patches v21: https://lkml.kernel.org/r/20210217222730.15819-1-yu-cheng.yu@intel.com/ https://lkml.kernel.org/r/20210217223135.16790-1-yu-cheng.yu@intel.com/ Yu-cheng Yu (2): sigaction.2: Add SEGV_CPERR sigaction.2: wfix - Clarify si_addr description. man2/sigaction.2 | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) -- 2.21.0