linux-kernel - Re: [RFC PATCH v4 2/2] arm64: Create a list of SYM_CODE functions, blacklist them in the unwinder

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Date:   Wed, 19 May 2021 21:00:15 -0500
From:   "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     mark.rutland@....com, jpoimboe@...hat.com, ardb@...nel.org,
        jthierry@...hat.com, catalin.marinas@....com, will@...nel.org,
        jmorris@...ei.org, pasha.tatashin@...een.com,
        linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v4 2/2] arm64: Create a list of SYM_CODE functions,
 blacklist them in the unwinder

Thanks a lot!

Madhavan

On 5/19/21 2:27 PM, Mark Brown wrote:
> On Sat, May 15, 2021 at 11:00:18PM -0500, madvenka@...ux.microsoft.com wrote:
>> From: "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>
>>
>> The unwinder should check if the return PC falls in any function that
>> is considered unreliable from an unwinding perspective. If it does,
>> mark the stack trace unreliable.
> 
> Other than the naming issue this makes sense to me, I'll try to go
> through the first patch properly in the next few days.
>