From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: venki kaps <venkiece2005@gmail.com>, Nicolas Pitre <nico@cam.org>,
"sagar.abhishek@gmail.com" <sagar.abhishek@gmail.com>,
"jkenisto@us.ibm.com" <jkenisto@us.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"prasanna@in.ibm.com" <prasanna@in.ibm.com>
Subject: Re: ARM + jprobes/kretprobes SEGV/hangs/OOPS in 2.6.29 kernel
Date: Tue, 1 Sep 2009 15:25:49 +0100 [thread overview]
Message-ID: <20090901142549.GA21501@flint.arm.linux.org.uk> (raw)
In-Reply-To: <tnxocpu7osx.fsf@pc1117.cambridge.arm.com>
On Tue, Sep 01, 2009 at 02:54:54PM +0100, Catalin Marinas wrote:
> venki kaps <venkiece2005@gmail.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.
If it uses CALLER_ADDRESSx() then it won't work with unwinding enabled.
See 5613/1 (which is pending in the devel branch.)
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
next prev parent reply other threads:[~2009-09-01 14:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-25 10:42 ARM + jprobes/kretprobes SEGV/hangs/OOPS in 2.6.29 kernel venki kaps
2009-08-25 17:37 ` Nicolas Pitre
2009-08-31 5:27 ` venki kaps
2009-08-31 10:11 ` venki kaps
2009-09-01 6:55 ` venki kaps
2009-09-01 13:54 ` Catalin Marinas
2009-09-01 14:25 ` Russell King [this message]
2009-09-01 14:43 ` Catalin Marinas
2009-09-01 17:56 ` Nicolas Pitre
2009-09-16 9:40 ` venki kaps
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