From: Steven Rostedt <rostedt@goodmis.org>
To: Christopher Friesen <cfriesen@nortel.com>
Cc: Keith Owens <kaos@ocs.com.au>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: question on memory map of process on i386
Date: Wed, 03 Aug 2005 23:56:07 -0400 [thread overview]
Message-ID: <1123127767.1590.141.camel@localhost.localdomain> (raw)
In-Reply-To: <42F15326.6000402@nortel.com>
On Wed, 2005-08-03 at 17:28 -0600, Christopher Friesen wrote:
> On i386, /proc/<pid>/maps shows the following entry:
>
> ffffe000-fffff000 ---p 00000000 00:00 0
>
> This page of memory is way up above TASK_SIZE (which is 0xc0000000), so
> how is it visible to userspace?
>
> Just to complicate things, I seem to find the vma for this page using
> find_vma_prev().
>
> Can anyone explain what's going on?
>
Looking at the code, it seems to be the "gate area". But what this is
used for, I'm not really sure. I did a little searching but found no
good explanations of it. So I added Keith to the CC since most of the
updates to this was submitted by him :-)
-- Steve
next prev parent reply other threads:[~2005-08-04 3:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-03 23:28 question on memory map of process on i386 Christopher Friesen
2005-08-04 3:56 ` Steven Rostedt [this message]
2005-08-04 4:22 ` Keith Owens
2005-08-04 6:58 ` Christopher Friesen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1123127767.1590.141.camel@localhost.localdomain \
--to=rostedt@goodmis.org \
--cc=cfriesen@nortel.com \
--cc=kaos@ocs.com.au \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox