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Date: Thu, 28 Aug 2014 11:24:07 +0100 From: Will Deacon <will.deacon@....com> To: Russell King - ARM Linux <linux@....linux.org.uk> Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>, Wang Nan <wangnan0@...wei.com>, "David A. Long" <dave.long@...aro.org>, Jon Medhurst <tixy@...aro.org>, Taras Kondratiuk <taras.kondratiuk@...aro.org>, Ben Dooks <ben.dooks@...ethink.co.uk>, Ananth N Mavinakayanahalli <ananth@...ibm.com>, Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>, "David S. Miller" <davem@...emloft.net>, Pei Feiyue <peifeiyue@...wei.com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v5 1/3] ARM: probes: check stack operation when decoding On Thu, Aug 28, 2014 at 11:20:21AM +0100, Russell King - ARM Linux wrote: > On Thu, Aug 28, 2014 at 06:51:15PM +0900, Masami Hiramatsu wrote: > > (2014/08/27 22:02), Wang Nan wrote: > > > This patch improves arm instruction decoder, allows it check whether an > > > instruction is a stack store operation. This information is important > > > for kprobe optimization. > > > > > > For normal str instruction, this patch add a series of _SP_STACK > > > register indicator in the decoder to test the base and offset register > > > in ldr <Rt>, [<Rn>, <Rm>] against sp. > > > > > > For stm instruction, it check sp register in instruction specific > > > decoder. > > > > OK, reviewed. but since I'm not so sure about arm32 ISA, > > I need help from ARM32 maintainer to ack this. > > What you actually need is an ack from the ARM kprobes people who > understand this code. That would be much more meaningful than my > ack. They're already on the Cc list. Tixy, can you take a look please? Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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