Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932167AbVJCHNT (ORCPT ); Mon, 3 Oct 2005 03:13:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932168AbVJCHNT (ORCPT ); Mon, 3 Oct 2005 03:13:19 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:8396 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S932167AbVJCHNS (ORCPT ); Mon, 3 Oct 2005 03:13:18 -0400 Subject: Re: Shared Library Holes in x86_amd64 From: Arjan van de Ven To: Arijit Das Cc: linux-kernel@vger.kernel.org In-Reply-To: <7EC22963812B4F40AE780CF2F140AFE9168364@IN01WEMBX1.internal.synopsys.com> References: <7EC22963812B4F40AE780CF2F140AFE9168364@IN01WEMBX1.internal.synopsys.com> Content-Type: text/plain Date: Mon, 03 Oct 2005 09:13:12 +0200 Message-Id: <1128323592.17024.1.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-Spam-Score: 2.9 (++) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.1 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 2.8 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 755 Lines: 19 > > Does anybody know the reason behind such holes inside a shared library > like /lib64/tls/libc.so.6 in RHAS30/x86_amd64 platforms? the minimum alignment as specified in the x64 ABI is 1 Megabyte (this was discussed last week already here after the first time you asked it, and also is not a kernel thing so your questions are off-topic for this mailing list). ld.so decides the easiest way to get that alignment is to PROT_NONE it, also to make sure nothing can go "in the middle" of such a library. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/