linux-kernel - Re: [PATCH v15 15/25] x86/asm/crypto: Create stack frames in aesni-intel

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Date:	Tue, 12 Jan 2016 17:53:00 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Josh Poimboeuf <jpoimboe@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
	Michal Marek <mmarek@...e.cz>,
	Peter Zijlstra <peterz@...radead.org>,
	Andy Lutomirski <luto@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Pedro Alves <palves@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	Bernd Petrovitsch <bernd@...rovitsch.priv.at>,
	Chris J Arges <chris.j.arges@...onical.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Mathias Krause <minipli@...linux.so>
Subject: Re: [PATCH v15 15/25] x86/asm/crypto: Create stack frames in
 aesni-intel_asm.S

On Fri, Dec 18, 2015 at 06:39:29AM -0600, Josh Poimboeuf wrote:
> aesni-intel_asm.S has several callable non-leaf functions which don't
> honor CONFIG_FRAME_POINTER, which can result in bad stack traces.
> 
> Create stack frames for them when CONFIG_FRAME_POINTER is enabled.
> 
> Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
> Cc: Herbert Xu <herbert@...dor.apana.org.au>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: Mathias Krause <minipli@...linux.so>
> ---
>  arch/x86/crypto/aesni-intel_asm.S | 73 ++++++++++++++++++++++++---------------
>  1 file changed, 46 insertions(+), 27 deletions(-)

After this one it says

stacktool: arch/x86/crypto/aesni-intel_asm.o: _aesni_inc_init(): can't find starting instruction
stacktool: arch/x86/crypto/aesni-intel_asm.o: _aesni_inc_init()+0x24: return instruction outside of a callable function

-- 
Regards/Gruss,
    Boris.

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