From owner-freebsd-current@FreeBSD.ORG  Thu Jan 29 00:55:10 2015
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 8BEFED88;
 Thu, 29 Jan 2015 00:55:10 +0000 (UTC)
Received: from mail-lb0-x236.google.com (mail-lb0-x236.google.com
 [IPv6:2a00:1450:4010:c04::236])
 (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 0F6FAD83;
 Thu, 29 Jan 2015 00:55:10 +0000 (UTC)
Received: by mail-lb0-f182.google.com with SMTP id l4so22875183lbv.13;
 Wed, 28 Jan 2015 16:55:08 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:from:date:message-id:subject:to:content-type;
 bh=bzoMcUYfTkGKOyMkuYKUmfupYVP3069M2jKCcsOJM+U=;
 b=g+Rc7/LIjiM5hX2PFcrVgjmclKW85VNzVPTk9RgYme5CSLT0RdZy7ou3NQvixW//kU
 qY214ybC+NhffRl4Qg1K+yG88p/Xi8soAJ2q9ycPbRYYwHpfl1q+TgAC13w/7OgH1I1I
 9pX0AxCdSDMbQuJC26w512XDhD/rdtVBPyUpZDRHvkK85xYWw/XNrZ7Jms9c1uaCRKLi
 Sen5Wwx4RAuMs1kseKL2ShkkH48NTnxhWze4oFdCQNzX8K3BKDoUIDEMWALEUiQe1uTC
 iiysewff88Atin1Epp1bF4EFleS1d4zV7F3/rA913Vy0RgP2Qvl6umakQ4TzEUJt4biL
 BY+w==
X-Received: by 10.152.115.212 with SMTP id jq20mr11556287lab.36.1422492908177; 
 Wed, 28 Jan 2015 16:55:08 -0800 (PST)
MIME-Version: 1.0
Received: by 10.25.12.6 with HTTP; Wed, 28 Jan 2015 16:54:37 -0800 (PST)
From: Yue Chen <ycyc321@gmail.com>
Date: Wed, 28 Jan 2015 19:54:37 -0500
Message-ID: <CAKtBrB4eKn-Zfeh1fmjiMUaU4ZMbewd3wh4+Nzc_BpS7rtRiUA@mail.gmail.com>
Subject: How to know the address ranges of kernel stacks, for user processes
 and kernel threads?
To: freebsd-hackers@freebsd.org, freebsd-current@freebsd.org
Content-Type: text/plain; charset=UTF-8
X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Jan 2015 00:55:10 -0000

How can we know the kernel stack ranges for user process and kernel threads
under FreeBSD x86_64?

It seems that each kernel stack has two pages (IA-32) to use. Does x86_64
still have two pages or more? And how can we find the address of these two
pages from a kernel module?