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=-4.4 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS autolearn=no 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 38DCDC433DF for ; Sun, 26 Jul 2020 01:34:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0FB1D206D8 for ; Sun, 26 Jul 2020 01:34:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ePcp0PV4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726931AbgGZBek (ORCPT ); Sat, 25 Jul 2020 21:34:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726870AbgGZBek (ORCPT ); Sat, 25 Jul 2020 21:34:40 -0400 Received: from mail-pj1-x1044.google.com (mail-pj1-x1044.google.com [IPv6:2607:f8b0:4864:20::1044]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2FA72C0619D2 for ; Sat, 25 Jul 2020 18:34:40 -0700 (PDT) Received: by mail-pj1-x1044.google.com with SMTP id i92so393705pje.0 for ; Sat, 25 Jul 2020 18:34:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:cc:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding; bh=mLMof1kuUbsc+nExhss4luZ/lbxEMXAsHmrr2sk0WsM=; b=ePcp0PV4TKD3nlz2kYW45oWHji4DIQugDaKy2EJOde+1UgbZj0NSa/2uAnZl/jOxEp h3Z50Y76XHuapkYqmVOhAqoB7ZA6ehR2qgCQrBtgYon3dvAPv6P/Ie/v88S+c7DITHpP m+nrCtgqNJu6f5okGGmGlFpTpSyS9XY07P4d1/m4bDkylzsNSuPKG5be33qFbdsCzFXY wArIolUYiBl/4ALPKaB4E7Kvqhqfhg/onBHwDkPoBmt0Bf9GjuYC+5pYizANTxCyR78y k+wcIIklYDuP6Yct7s/X/Sl5Yv5BsaDI2U025nbXAzaoKkPj0S6qoxLLBgQrx72M+86e go1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:cc:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=mLMof1kuUbsc+nExhss4luZ/lbxEMXAsHmrr2sk0WsM=; b=ZF9hagDxYhUveZYZTYyd532lUVDYACQ1+HrlIa9ZLVN9GDrTON7pA79qYYglBxkC41 isZDfI42zD5QknQa69cNEnm2yXP8XlFdubjDRHYFH47qycCHKly+3joEs64OK3JpYT0i dHhSjbALEGEpI0ZeUVnAEHDUzvnBbHR6Qf+RyfhuESSadJIU0FnPvMSHsY1CGM+4FU21 f1XDksA23HGW6FuO7WsSlwLjENIsLq6/wZZTW8kDs/yeqFI7H870Do8KVRJjWDNMaaKY MgStDjgoNGsu5h1fYEmBKc2ktRsW586NIAKGNj478UflaaHvGMcSE8blJMlJEoZodWca yU6A== X-Gm-Message-State: AOAM532a/DlOqDOdVFmKlDD1ZtyAlu4Jd2kCm4PiGCTN4UKLbV46XnuK uOiVvJKJM58qqDmVRX/9Yww= X-Google-Smtp-Source: ABdhPJyuAiB5tCWunuL7jQslrSVM5WzEb0QmHLQxmHi4JzanV3XJ6i8o3NUKDd2Nb5++KrKuMpkl6w== X-Received: by 2002:a17:90a:1f81:: with SMTP id x1mr11114463pja.115.1595727279223; Sat, 25 Jul 2020 18:34:39 -0700 (PDT) Received: from [192.168.1.101] (122-58-181-132-adsl.sparkbb.co.nz. [122.58.181.132]) by smtp.gmail.com with ESMTPSA id w17sm10033963pge.10.2020.07.25.18.34.36 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 25 Jul 2020 18:34:38 -0700 (PDT) Subject: Re: Seccomp support for linux-m68k To: John Paul Adrian Glaubitz , linux-m68k References: <5642df4a-be8f-01eb-63c1-b5b4d75fa9d0@physik.fu-berlin.de> <06f3ccd0-3567-5905-eea0-80fb18206648@gmail.com> Cc: Debian m68k , Helge Deller From: Michael Schmitz Message-ID: Date: Sun, 26 Jul 2020 13:34:34 +1200 User-Agent: Mozilla/5.0 (X11; Linux ppc; rv:45.0) Gecko/20100101 Icedove/45.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-m68k-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org Hi Adrian, Am 26.07.2020 um 06:54 schrieb John Paul Adrian Glaubitz: >> What return code would we need to set on returning from an aborted syscall? >> (Without setting a specific one, -ENOSYS will be used by default.) > > If we're talking about syscall_trace_enter(), it should be -1. OK, that's -EPERM. Reading the comment in asm/errno.h, -ENOSYS is not a legitimate return code for syscalls to use. I'll change the trace entry check to set -EPERM instead. Andreas: could we preset -EPERM as return code on entering do_trace_entry to save another jump, possibly even without setting -ENOSYS before attempting the syscall, or would that break the syscall ABI? Cheers, Michael > > Adrian >