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To:     "'madvenka@linux.microsoft.com'" <madvenka@linux.microsoft.com>,
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Subject: RE: [PATCH v13 11/11] arm64: Select HAVE_RELIABLE_STACKTRACE
Thread-Topic: [PATCH v13 11/11] arm64: Select HAVE_RELIABLE_STACKTRACE
Thread-Index: AQHYC7J0j/1dz1/1vkuQ8Ct1CeQ76axzKz3Q
Date:   Tue, 25 Jan 2022 05:21:27 +0000
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Hi Madhavan,

> Select HAVE_RELIABLE_STACKTRACE in arm64/Kconfig to allow
> arch_stack_walk_reliable() to be used.
>=20
> Note that this is conditional upon STACK_VALIDATION which will be added w=
hen 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-jthie=
rry@redhat.com/


Thanks,
Keiya

>=20
> Signed-off-by: Madhavan T. Venkataraman <madvenka@linux.microsoft.com>
> ---
>  arch/arm64/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>=20
> 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.
>=20
> --
> 2.25.1