linux-kernel - Re: Running Application Inside Application

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Date:	Mon, 21 Nov 2011 12:05:51 +0100
From:	Bernd Petrovitsch <bernd@...rovitsch.priv.at>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	Xin Tong <xerox.time.tech@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Running Application Inside Application

On Mon, 2011-11-21 at 11:25 +0800, Cong Wang wrote:
> On Mon, Nov 21, 2011 at 10:18 AM, Xin Tong <xerox.time.tech@...il.com> wrote:
> > I have applications that do not install signal handlers I need it to
> > install. Therefore, I am thinking about having a light-weight run-time
> > to load the application ELF file and install the needed signal handler
> > in the run-time ? Is this doable ? What if it is not ELF-encoded ?
> 
> If you want to exec*() to load the ELF, no, the signal handlers will be

It is in general so - not only für ELF.

> cleared after exec*(), as the entire .text will be replaced by the new ELF file.
> 
> So, you probably have to parse and load the ELF file by yourself.

Hmmm, if these (obviously broken) applications use dynamic linking, one
could probably use a preload library.
Never tried that though .....

	Bernd
-- 
Bernd Petrovitsch                  Email : bernd@...rovitsch.priv.at
                     LUGA : http://www.luga.at

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