From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262858AbVAQTzm (ORCPT ); Mon, 17 Jan 2005 14:55:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262859AbVAQTzl (ORCPT ); Mon, 17 Jan 2005 14:55:41 -0500 Received: from quark.didntduck.org ([69.55.226.66]:50581 "EHLO quark.didntduck.org") by vger.kernel.org with ESMTP id S262858AbVAQTzf (ORCPT ); Mon, 17 Jan 2005 14:55:35 -0500 Message-ID: <41EC1853.2070107@didntduck.org> Date: Mon, 17 Jan 2005 14:56:03 -0500 From: Brian Gerst User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Chris Bookholt CC: LKML Subject: Re: 2.6 Series Mem Mgmt References: <200501151654.46412.pioppo@ferrara.linux.it> <20050115175545.743a39f9.khali@linux-fr.org> <200501162332.14324.pioppo@ferrara.linux.it> <20050117201901.3e712cfa.khali@linux-fr.org> <41EC1406.6040500@kavefish.net> In-Reply-To: <41EC1406.6040500@kavefish.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Chris Bookholt wrote: > I'm hoping someone can help explain part of the layout of a process' > virtual address space in the 2.6 series kernel. > > Below is the output of "cat /proc/self/maps" on Fedora Core 3 > (2.6.9-1.6_FC2) with exec-shield[-randomize] disabled and > legacy_vm_layout enabled. > > What is being mapped in at last line (ffffe000-fffff000 ---p)? This is > always there, no matter what process I run. To my knowledge, this > wasn't the case on 2.4. > > >$ cat /proc/self/maps > 08048000-0804c000 r-xp 00000000 03:03 2490451 /bin/cat > 0804c000-0804d000 rw-p 00003000 03:03 2490451 /bin/cat > 0804d000-0806e000 rw-p 0804d000 00:00 0 > 42344000-42359000 r-xp 00000000 03:03 950351 /lib/ld-2.3.3.so > 42359000-4235a000 r--p 00014000 03:03 950351 /lib/ld-2.3.3.so > 4235a000-4235b000 rw-p 00015000 03:03 950351 /lib/ld-2.3.3.so > 4235d000-42473000 r-xp 00000000 03:03 950450 /lib/tls/libc-2.3.3.so > 42473000-42474000 r--p 00116000 03:03 950450 /lib/tls/libc-2.3.3.so > 42474000-42477000 rw-p 00117000 03:03 950450 /lib/tls/libc-2.3.3.so > 42477000-42479000 rw-p 42477000 00:00 0 > 55017000-55018000 rw-p 55017000 00:00 0 > 55018000-55218000 r--p 00000000 03:03 114690 /usr/lib/locale/locale-archive > feffe000-ff000000 rw-p feffe000 00:00 0 > ffffe000-fffff000 ---p 00000000 00:00 0 > > I have not had much success in my search for information via Google & > IRC and the books I have are specific to the 2.4 series. Any help would > be greatly appreciated. > That is the vsyscall page. -- Brian Gerst