linux-kernel - Re: What's does KPROBE

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Message-ID: <4104961b0707252350g163dc133r420422dd4dde40f2@mail.gmail.com>
Date:	Thu, 26 Jul 2007 14:50:38 +0800
From:	"jidong xiao" <jidong.xiao@...il.com>
To:	"Paul Mundt" <lethal@...ux-sh.org>, linux-kernel@...r.kernel.org
Subject: Re: What's does KPROBE_ENTRY mean?

Thanks.So if I don't care any probes, and I actually don't need to
take use of kprobes, then I can use the functions defined through
KPROBE_ENTRY() the same way as those defined via ENTRY(), right?

Regards
Jason Xiao

On 7/26/07, Paul Mundt <lethal@...ux-sh.org> wrote:
> 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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