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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 3DBC6C10DCE for ; Fri, 6 Mar 2020 12:07:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 18CA32072D for ; Fri, 6 Mar 2020 12:07:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726307AbgCFMHt (ORCPT ); Fri, 6 Mar 2020 07:07:49 -0500 Received: from mout.kundenserver.de ([212.227.126.133]:60345 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726185AbgCFMHt (ORCPT ); Fri, 6 Mar 2020 07:07:49 -0500 Received: from [192.168.100.1] ([82.252.135.106]) by mrelayeu.kundenserver.de (mreue010 [213.165.67.103]) with ESMTPSA (Nemesis) id 1MpUEO-1jiMP11Elg-00pqcq; Fri, 06 Mar 2020 13:07:39 +0100 To: YunQiang Su , Florian Weimer Cc: torvalds@linux-foundation.org, Greg KH , akpm@linux-foundation.org, Al Viro , James Bottomley , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, libc-alpha@sourceware.org References: <20200306080905.173466-1-syq@debian.org> <87r1y53npd.fsf@mid.deneb.enyo.de> <8441f497-61eb-5c14-bf1e-c90a464105a7@vivier.eu> <87mu8t3mlw.fsf@mid.deneb.enyo.de> <40da389d-4e74-2644-2e7c-04d988fcc26f@vivier.eu> <87v9nhzp6w.fsf@mid.deneb.enyo.de> From: Laurent Vivier Autocrypt: addr=laurent@vivier.eu; prefer-encrypt=mutual; keydata= mQINBFYFJhkBEAC2me7w2+RizYOKZM+vZCx69GTewOwqzHrrHSG07MUAxJ6AY29/+HYf6EY2 WoeuLWDmXE7A3oJoIsRecD6BXHTb0OYS20lS608anr3B0xn5g0BX7es9Mw+hV/pL+63EOCVm SUVTEQwbGQN62guOKnJJJfphbbv82glIC/Ei4Ky8BwZkUuXd7d5NFJKC9/GDrbWdj75cDNQx UZ9XXbXEKY9MHX83Uy7JFoiFDMOVHn55HnncflUncO0zDzY7CxFeQFwYRbsCXOUL9yBtqLer Ky8/yjBskIlNrp0uQSt9LMoMsdSjYLYhvk1StsNPg74+s4u0Q6z45+l8RAsgLw5OLtTa+ePM JyS7OIGNYxAX6eZk1+91a6tnqfyPcMbduxyBaYXn94HUG162BeuyBkbNoIDkB7pCByed1A7q q9/FbuTDwgVGVLYthYSfTtN0Y60OgNkWCMtFwKxRaXt1WFA5ceqinN/XkgA+vf2Ch72zBkJL RBIhfOPFv5f2Hkkj0MvsUXpOWaOjatiu0fpPo6Hw14UEpywke1zN4NKubApQOlNKZZC4hu6/ 8pv2t4HRi7s0K88jQYBRPObjrN5+owtI51xMaYzvPitHQ2053LmgsOdN9EKOqZeHAYG2SmRW LOxYWKX14YkZI5j/TXfKlTpwSMvXho+efN4kgFvFmP6WT+tPnwARAQABtCJMYXVyZW50IFZp dmllciA8bGF1cmVudEB2aXZpZXIuZXU+iQI4BBMBAgAiBQJWBTDeAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAAKCRDzDDi9Py++PCEdD/oD8LD5UWxhQrMQCsUgLlXCSM7sxGLkwmmF ozqSSljEGRhffxZvO35wMFcdX9Z0QOabVoFTKrT04YmvbjsErh/dP5zeM/4EhUByeOS7s6Yl HubMXVQTkak9Wa9Eq6irYC6L41QNzz/oTwNEqL1weV1+XC3TNnht9B76lIaELyrJvRfgsp9M rE+PzGPo5h7QHWdL/Cmu8yOtPLa8Y6l/ywEJ040IoiAUfzRoaJs2csMXf0eU6gVBhCJ4bs91 jtWTXhkzdl4tdV+NOwj3j0ukPy+RjqeL2Ej+bomnPTOW8nAZ32dapmu7Fj7VApuQO/BSIHyO NkowMMjB46yohEepJaJZkcgseaus0x960c4ua/SUm/Nm6vioRsxyUmWd2nG0m089pp8LPopq WfAk1l4GciiMepp1Cxn7cnn1kmG6fhzedXZ/8FzsKjvx/aVeZwoEmucA42uGJ3Vk9TiVdZes lqMITkHqDIpHjC79xzlWkXOsDbA2UY/P18AtgJEZQPXbcrRBtdSifCuXdDfHvI+3exIdTpvj BfbgZAar8x+lcsQBugvktlQWPfAXZu4Shobi3/mDYMEDOE92dnNRD2ChNXg2IuvAL4OW40wh gXlkHC1ZgToNGoYVvGcZFug1NI+vCeCFchX+L3bXyLMg3rAfWMFPAZLzn42plIDMsBs+x2yP +bkCDQRWBSYZARAAvFJBFuX9A6eayxUPFaEczlMbGXugs0mazbOYGlyaWsiyfyc3PStHLFPj rSTaeJpPCjBJErwpZUN4BbpkBpaJiMuVO6egrC8Xy8/cnJakHPR2JPEvmj7Gm/L9DphTcE15 92rxXLesWzGBbuYxKsj8LEnrrvLyi3kNW6B5LY3Id+ZmU8YTQ2zLuGV5tLiWKKxc6s3eMXNq wrJTCzdVd6ThXrmUfAHbcFXOycUyf9vD+s+WKpcZzCXwKgm7x1LKsJx3UhuzT8ier1L363RW ZaJBZ9CTPiu8R5NCSn9V+BnrP3wlFbtLqXp6imGhazT9nJF86b5BVKpF8Vl3F0/Y+UZ4gUwL d9cmDKBcmQU/JaRUSWvvolNu1IewZZu3rFSVgcpdaj7F/1aC0t5vLdx9KQRyEAKvEOtCmP4m 38kU/6r33t3JuTJnkigda4+Sfu5kYGsogeYG6dNyjX5wpK5GJIJikEhdkwcLM+BUOOTi+I9u tX03BGSZo7FW/J7S9y0l5a8nooDs2gBRGmUgYKqQJHCDQyYut+hmcr+BGpUn9/pp2FTWijrP inb/Pc96YDQLQA1q2AeAFv3Rx3XoBTGl0RCY4KZ02c0kX/dm3eKfMX40XMegzlXCrqtzUk+N 8LeipEsnOoAQcEONAWWo1HcgUIgCjhJhBEF0AcELOQzitbJGG5UAEQEAAYkCHwQYAQIACQUC VgUmGQIbDAAKCRDzDDi9Py++PCD3D/9VCtydWDdOyMTJvEMRQGbx0GacqpydMEWbE3kUW0ha US5jz5gyJZHKR3wuf1En/3z+CEAEfP1M3xNGjZvpaKZXrgWaVWfXtGLoWAVTfE231NMQKGoB w2Dzx5ivIqxikXB6AanBSVpRpoaHWb06tPNxDL6SVV9lZpUn03DSR6gZEZvyPheNWkvz7bE6 FcqszV/PNvwm0C5Ju7NlJA8PBAQjkIorGnvN/vonbVh5GsRbhYPOc/JVwNNr63P76rZL8Gk/ hb3xtcIEi5CCzab45+URG/lzc6OV2nTj9Lg0SNcRhFZ2ILE3txrmI+aXmAu26+EkxLLfqCVT ohb2SffQha5KgGlOSBXustQSGH0yzzZVZb+HZPEvx6d/HjQ+t9sO1bCpEgPdZjyMuuMp9N1H ctbwGdQM2Qb5zgXO+8ZSzwC+6rHHIdtcB8PH2j+Nd88dVGYlWFKZ36ELeZxD7iJflsE8E8yg OpKgu3nD0ahBDqANU/ZmNNarBJEwvM2vfusmNnWm3QMIwxNuJghRyuFfx694Im1js0ZY3LEU JGSHFG4ZynA+ZFUPA6Xf0wHeJOxGKCGIyeKORsteIqgnkINW9fnKJw2pgk8qHkwVc3Vu+wGS ZiJK0xFusPQehjWTHn9WjMG1zvQ5TQQHxau/2FkP45+nRPco6vVFQe8JmgtRF8WFJA== Subject: Re: [PATCH] binfmt_misc: pass binfmt_misc P flag to the interpreter Message-ID: Date: Fri, 6 Mar 2020 13:07:35 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: fr Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:sS0pEc3oZIyEzau4kLZy+OvT/6DVlshFGx7QYjKMvNLMnN8vtWW 0Pl/Ty8JQPjf6lKH/g8otWFCeEfw5ZhVJz42tGy7+MsujAZbsH09NGdxNpgMvHc4s6wUeZh e9I1+47tgNWIbb4R9aLhYWe+6hglEEs366lKO3YycGJQ7sCUN32cj+OpGrLs3g6Qx3uesqK h9zavz6MrxQQj26kHFErg== X-UI-Out-Filterresults: notjunk:1;V03:K0:5kvOibS7td0=:DA8VhOfFP9IY3CqSMmaG4/ KWlnd8QpDfMF8fB4H758KjsXJMMYrFm9wG8ukjgzv243ofFP/bsEV8UozaImwIW2f+rOSe9T8 D7BSL3hvglSbLptc7npvNDFJs8dPWYelSv1PknSp3rpl3Aqtr2W0Iykb/oZyEGaLT73k4X+Gw aqGRtFSxd5hWCZ0slnXGNfp9fvA76tlgID/nzn2Dhe4S3q95WvoWEM3NSvyzEuwGkHXmmvtiK A0xKXBVdSsBQ25neI5qJyW2W+l3Ot7EgUKUM5F+pr/TfZ3qS9b/Jg+sx4uajOhlfMxKVG0HMm quzxlv39I5qD2wPE3R5bYap2KHsCYR7OQE+wJko2Q6dbJ8IeV5xGGEI2QU135BZz+3I9taXtR nBlYYJYDGq/y9KW1bz/MQHE39nNu8ZByOazAb8fyaXwdGeiKYEBVFiK/83miH+YGB/9LL/TYY GEwwPqYYY4tQQkg7loQzWot9e4hLMLdFNqflFegGq7gN6lwbGo3aSHhqt0nw4G4zu2/UQ4Cc+ okrKB8uSycaZiQH9yTz8yWk9POHBfSgaPXsS9OSWEJa+rLmnBQHHWWY+u9CdamasyGPwgK0hV VA4QY+N/7falBwlO/ceqAFN4T2z8Jr7CVk78n/XSpoCd87HN/X5QJAZNzux7d2l6GfdiCxOe9 TloG6fwQDAPqWMLNw/9NayNNV18mck/FYl2nCXgxuC6EUVJ+KIYEdCvrXpYInxtampiLHvwqd 2UKgVfLxLaBpBS6tcY07Zsnp6D2663IVTpFaBFe28hY0/Kgoa9LvgCRP/q/AIKxYZ6eMKEgyj dKscbDuPw0ilsO8yJoUzWd5sgCW+pbly5MRRIUih+YKBpl9O4IMMPBOV7ALOFZx1Vb4wtZI Sender: linux-api-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org Le 06/03/2020 à 12:48, YunQiang Su a écrit : > Florian Weimer 于2020年3月6日周五 下午7:42写道： >> >> * YunQiang Su: >> >>> AT_* only has 32 slot and now. I was afraid that maybe we shouldn't take one. >>> /* AT_* values 18 through 22 are reserved */ >>> 27,28,29,30 are not used now. >>> Which should we use? >> >> Where does this limit of 32 tags come from? I don't see it from a >> userspace perspective. > > Sorry it is my mistake: In linux/auxvec.h, I saw > > #define AT_RANDOM 25 /* address of 16 random bytes */ > #define AT_HWCAP2 26 /* extension of AT_HWCAP */ > > #define AT_EXECFN 31 /* filename of program */ > > The number jump to 31 from 26. > > It is my fault: in x86_64-linux-gnu/bits/auxv.h, the max number is 47 now. > Numbers starting from 32 are arch specific. 18 to 22 are also reserved (and used by some archs). (linux/arch/*/include/uapi/asm/auxvec.h) So there is only 4 entries available (27 to 30) (linux/include/uapi/linux/auxvec.h) Do we want to waste one more entry whereas we can use an unused one? Thanks, Laurent