From: j.neuschaefer@gmx.net (Jonathan Neuschäfer)
To: kernelnewbies@lists.kernelnewbies.org
Subject: How to hook the system call?
Date: Sun, 27 Nov 2011 23:17:19 +0100 [thread overview]
Message-ID: <20111127221719.GA1522@debian.debian> (raw)
In-Reply-To: <CAAdM-RWsvJ_EQUfmx8daZbahH54FAzAm4FniGCWbKK_z8mN4TQ@mail.gmail.com>
On Wed, Nov 23, 2011 at 04:40:14PM +0800, Geraint Yang wrote:
> Hello everyone,
>
> I am going to hook a system call like 'read' or 'send' by modifying the
> sys_call_table, but it seems that the sys_call_table is in read only page,
> how can I set modify the sys_call_table ? Or if there any method that I can
> use to hook a system call in module without modify the kernel source?
There's a kernel module for "advanced rickrolling" that overwrites the
open entry in the syscall table: https://github.com/fpletz/kernelroll
It does some trickery to make the page writable first.
HTH,
Jonathan Neusch?fer
next prev parent reply other threads:[~2011-11-27 22:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-23 8:40 How to hook the system call? Geraint Yang
2011-11-23 9:22 ` Alexandru Juncu
2011-11-23 10:10 ` Daniel Baluta
2011-11-23 10:27 ` Alexandru Juncu
2011-11-23 12:02 ` rohan puri
2011-11-23 16:50 ` Geraint Yang
2011-11-23 16:59 ` Alexandru Juncu
2011-11-23 18:05 ` Geraint Yang
2011-11-23 18:20 ` Nuno Martins
2011-11-24 4:04 ` rohan puri
2011-11-27 22:17 ` Jonathan Neuschäfer [this message]
2011-11-28 1:12 ` richard -rw- weinberger
2011-11-28 2:12 ` Geraint Yang
2011-11-28 9:48 ` Jonathan Neuschäfer
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=20111127221719.GA1522@debian.debian \
--to=j.neuschaefer@gmx.net \
--cc=kernelnewbies@lists.kernelnewbies.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;
as well as URLs for NNTP newsgroup(s).