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

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Message-ID: <tnxocpu7osx.fsf@pc1117.cambridge.arm.com>
Date:	Tue, 01 Sep 2009 14:54:54 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	venki kaps <venkiece2005@...il.com>
Cc:	Nicolas Pitre <nico@....org>,
	"sagar.abhishek\@gmail.com" <sagar.abhishek@...il.com>,
	"jkenisto\@us.ibm.com" <jkenisto@...ibm.com>,
	"rmk+kernel\@arm.linux.org.uk" <rmk+kernel@....linux.org.uk>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	"prasanna\@in.ibm.com" <prasanna@...ibm.com>
Subject: Re: ARM + jprobes/kretprobes SEGV/hangs/OOPS in 2.6.29 kernel

venki kaps <venkiece2005@...il.com> wrote:
> I have found the exact problem with respect to ARM jprobes.
>
> The problem with configure i.e, CONFIG_ARM_UNWIND = y; is enabled.

I haven't followed the kprobes implementation for ARM but does it make
any assumptions about the existence of a frame pointer on the stack?
Enabling stack unwinding automatically disables the framepointer.

-- 
Catalin
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