linux-kernel - Re: Broken dwarf unwinding - wrong stack pointer register value?

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Message-ID: <20181024144818.GF6218@tassilo.jf.intel.com>
Date:   Wed, 24 Oct 2018 07:48:18 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Milian Wolff <milian.wolff@...b.com>
Cc:     linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        namhyung@...nel.org, linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho <acme@...nel.org>
Subject: Re: Broken dwarf unwinding - wrong stack pointer register value?

> 
> Can someone at least confirm whether unwinding from a function prologue via 
> .eh_frame (but without .debug_frame) should actually be possible?

Yes it should be possible. Asynchronous unwind tables should work
from any instruction.

-Andi