linux-kernel - Re: [PATCH v2 01/14] kasan: sw_tags: Use arithmetic shift for shadow computation

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Message-ID: <CA+fCnZcCCXPmeEQw0cyQt7MLchMiMvzfZj=g-95UOURT4xK9KQ@mail.gmail.com>
Date: Sat, 1 Mar 2025 01:22:46 +0100
From: Andrey Konovalov <andreyknvl@...il.com>
To: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>
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Subject: Re: [PATCH v2 01/14] kasan: sw_tags: Use arithmetic shift for shadow computation

On Thu, Feb 27, 2025 at 1:33 PM Maciej Wieczor-Retman
<maciej.wieczor-retman@...el.com> wrote:
>
> Btw just out of curiosity on the topic. If we used a runtime specified kasan
> offset, could the gdb script issue (not knowing the offset at compile-time) be
> fixed by just exporting the value through sysfs?
>
> I know that in inline mode the compiler would still need to know the offset
> value but I was curious if this approach was okay at least in outline mode?

I think this would work, assuming that GDB can pick it up from sysfs.