linux-kernel - Re: [PATCH v13 11/11] arm64: Select HAVE_RELIABLE_STACKTRACE

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Date:   Tue, 25 Jan 2022 07:43:51 -0600
From:   "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>
To:     "nobuta.keiya@...itsu.com" <nobuta.keiya@...itsu.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "jpoimboe@...hat.com" <jpoimboe@...hat.com>,
        "ardb@...nel.org" <ardb@...nel.org>,
        "sjitindarsingh@...il.com" <sjitindarsingh@...il.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>,
        "jmorris@...ei.org" <jmorris@...ei.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "live-patching@...r.kernel.org" <live-patching@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v13 11/11] arm64: Select HAVE_RELIABLE_STACKTRACE

I have not seen any activity on that in a long time. IIRC, Julien quit RedHat.
I don't know if anyone else has taken over this work in RedHat.

Sorry, I don't have any more information.

Madhavan

On 1/24/22 23:21, nobuta.keiya@...itsu.com wrote:
> Hi Madhavan,
> 
>> Select HAVE_RELIABLE_STACKTRACE in arm64/Kconfig to allow
>> arch_stack_walk_reliable() to be used.
>>
>> Note that this is conditional upon STACK_VALIDATION which will be added when frame pointer validation is implemented (say
>> via objtool).
> 
> I know that Julien Thierry published objtool support for arm64 [1], but I'm not
> sure if it has been updated. Could you tell me other threads if you know?
> 
> [1] https://lore.kernel.org/linux-arm-kernel/20210303170932.1838634-1-jthierry@redhat.com/
> 
> 
> Thanks,
> Keiya
> 
>>
>> Signed-off-by: Madhavan T. Venkataraman <madvenka@...ux.microsoft.com>
>> ---
>>  arch/arm64/Kconfig | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index f6e333b59314..bc7b3514b563 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -223,6 +223,7 @@ config ARM64
>>  	select THREAD_INFO_IN_TASK
>>  	select HAVE_ARCH_USERFAULTFD_MINOR if USERFAULTFD
>>  	select TRACE_IRQFLAGS_SUPPORT
>> +	select HAVE_RELIABLE_STACKTRACE if FRAME_POINTER && STACK_VALIDATION
>>  	help
>>  	  ARM 64-bit (AArch64) Linux support.
>>
>> --
>> 2.25.1
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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