linux-kernel - Re: ARM + jprobes/kretprobes SEGV/hangs/OOPS in 2.6.29 kernel

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Date:	Tue, 25 Aug 2009 13:37:37 -0400 (EDT)
From:	Nicolas Pitre <nico@....org>
To:	venki kaps <venkiece2005@...il.com>
Cc:	"sagar.abhishek@...il.com" <sagar.abhishek@...il.com>,
	"jkenisto@...ibm.com" <jkenisto@...ibm.com>,
	"rmk+kernel@....linux.org.uk" <rmk+kernel@....linux.org.uk>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"linux-arm@...r.kernel.org" <linux-arm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"prasanna@...ibm.com" <prasanna@...ibm.com>
Subject: Re: ARM + jprobes/kretprobes SEGV/hangs/OOPS in 2.6.29 kernel

On Tue, 25 Aug 2009, venki kaps wrote:

> Hi,
> 
> I have been tracing kernel system call information using
> the Kprobes/jprobes/kretprobes implementation in the 2.6.29 kernel on
> ARM architecture.
> Although the mainline kprobe/jprobe/kretprobe examples are working
> fine (do_fork),
> I have been facing some issues while running my own jprobe/kretprobe tests.
> 
[...]
> 
> Query:
> =====
> 	- Are there any limitations for jptobes/kretporbes in mainline kernel for ARM?

No limitation in particular that I know of.

> 	- Why it works for only do_fork and why not for others
> (do_execve/sys_open/sys_close/sys_read/sys_write)?

I don't know.  Will try to have a look.

> 	- Is it required any additional setup to achieve this?

Not supposed to need anything special.


Nicolas
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