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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 CE48AC43219 for ; Thu, 2 May 2019 20:52:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 99FEF2085A for ; Thu, 2 May 2019 20:52:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726463AbfEBUwo (ORCPT ); Thu, 2 May 2019 16:52:44 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57998 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726366AbfEBUwn (ORCPT ); Thu, 2 May 2019 16:52:43 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E7980C05681F; Thu, 2 May 2019 20:52:42 +0000 (UTC) Received: from jsavitz.bos.com (dhcp-17-168.bos.redhat.com [10.18.17.168]) by smtp.corp.redhat.com (Postfix) with ESMTP id 19B4A5DA34; Thu, 2 May 2019 20:52:41 +0000 (UTC) From: Joel Savitz To: linux-kernel@vger.kernel.org Cc: Joel Savitz , Thomas Gleixner , Ingo Molnar , Masami Hiramatsu , Waiman Long , Mauro Carvalho Chehab , Kristina Martsenko , Andrew Morton , Cyrill Gorcunov , Kees Cook , "Gustavo A. R. Silva" , YueHaibing , Micah Morton , Yang Shi , Jann Horn , Alexey Dobriyan , Rafael Aquini , Michael Kerrisk , Yury Norov Subject: [PATCH v2 2/2] prctl.2: Document the new PR_GET_TASK_SIZE option Date: Thu, 2 May 2019 16:52:22 -0400 Message-Id: <1556830342-32307-3-git-send-email-jsavitz@redhat.com> In-Reply-To: <1556830342-32307-1-git-send-email-jsavitz@redhat.com> References: <1556830342-32307-1-git-send-email-jsavitz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Thu, 02 May 2019 20:52:43 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a short explanation of the new PR_GET_TASK_SIZE option for the benefit of future generations. Signed-off-by: Joel Savitz --- man2/prctl.2 | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/man2/prctl.2 b/man2/prctl.2 index 06d8e13c7..35a6a3919 100644 --- a/man2/prctl.2 +++ b/man2/prctl.2 @@ -49,6 +49,7 @@ .\" 2013-01-10 Kees Cook, document PR_SET_PTRACER .\" 2012-02-04 Michael Kerrisk, document PR_{SET,GET}_CHILD_SUBREAPER .\" 2014-11-10 Dave Hansen, document PR_MPX_{EN,DIS}ABLE_MANAGEMENT +.\" 2019-05-02 Joel Savitz, document PR_GET_TASK_SIZE .\" .\" .TH PRCTL 2 2019-03-06 "Linux" "Linux Programmer's Manual" @@ -1375,6 +1376,14 @@ system call on Tru64). for information on versions and architectures) Return unaligned access control bits, in the location pointed to by .IR "(unsigned int\ *) arg2" . +.TP +.B PR_GET_TASK_SIZE +Copy the value of TASK_SIZE to the userspace address in +.IR "(unsigned long\ *) arg2" . +Return +.B EFAULT +if this operation fails. + .SH RETURN VALUE On success, .BR PR_GET_DUMPABLE , -- 2.18.1