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Date:   Sat, 12 Feb 2022 00:43:18 -0800
From:   Dan Li <>
Subject: Re: [PATCH] [PATCH,v4,1/1,AARCH64][PR102768] aarch64: Add compiler
 support for Shadow Call Stack

On 2/11/22 07:35, Richard Sandiford wrote:
> Dan Li <> writes:
>> On 2/11/22 01:53, Richard Sandiford wrote:
>>> Dan Li <> writes:
>>>> On 2/10/22 01:55, Richard Sandiford wrote:
>> And I think maybe we could handle this through three patches:
>> 1.Keep current patch (a V5) unchanged for scs.
>> 2.Add shrink-warpping for X30:
>> logically this might be a separate topic, and I think more testing
>> might be needed here (Well, I'm a little worried about if there might
>> be other effects, since I just read this part of the code roughly
>> yesterday).
>> 3.Add scs push/pop to shrink-wrapping (and maybe we can do the same for
>> the PAC code in pro/epilogue, since it's also the operation of the X30).
> Yeah, that's fair.
> (Like I said earlier, I wasn't asking for the shrink-wrapping change.
> It was just a note in passing.  But as you point out, the individual
> shrink-wrapping support would be even more work than I'd imagined.)

Hi, Richard,
I have sent out the v5[1] and rebased it to mainline at the same time,
please let me know if there is anything else I need to do :)



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