linux-kernel - Re: [PATCH] arm: perf: Fix userspace call stack walking

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Message-ID: <20151001191041.GY21513@n2100.arm.linux.org.uk>
Date:	Thu, 1 Oct 2015 20:10:41 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Drew Richardson <drew.richardson@....com>
Cc:	will.deacon@....com, a.p.zijlstra@...llo.nl, mingo@...hat.com,
	acme@...nel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, wade.cherry@....com,
	pawel.moll@....com
Subject: Re: [PATCH] arm: perf: Fix userspace call stack walking

On Thu, Oct 01, 2015 at 10:26:47AM -0700, Drew Richardson wrote:
> The layout of stack frames has changed over time. Testing using a
> arm-linux-gnueabi gcc-4.2 from 2007 the original code didn't work but
> this new code does. It also works with clang as well as newer versions
> of gcc.

Can you point to a modern ARM distribution where perf actually works with
calltraces into userspace?

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