linux-kernel - Re: What's does KPROBE

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Message-ID: <20070726061117.GA25926@linux-sh.org>
Date:	Thu, 26 Jul 2007 15:11:17 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	jidong xiao <jidong.xiao@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: What's does KPROBE_ENTRY mean?

On Thu, Jul 26, 2007 at 01:43:10PM +0800, jidong xiao wrote:
> Anyone can help this?
> 
> On 6/21/07, jidong xiao <jidong.xiao@...il.com> wrote:
> > I searched in linux kernel 2.6.10, didn't find it, then I tried
> > 2.6.20, it is there. But I am not familiar with assembly language, so
> > can anybody kindly explain it, I don't know the difference between
> > KPROBE_ENTRY and ENTRY, however, I can find both of these items in
> > some files, such as arch/x86_64/kernel/entry.S.
> >
KPROBE_ENTRY() is the assembly equivalent of __kprobes, it places the
symbol in a special section (.kprobes.text) where probes can't be
inserted. This is usually helpful in cases where inserting the probe may
lead to recursion or other undesirable behaviour.

See include/linux/linkage.h and include/linux/kprobes.h.
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