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RE: [v2 4/4] xen/arm: Allow the user to build Xen with UBSAN
- To: Julien Grall <julien@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Henry Wang <Henry.Wang@xxxxxxx>
- Date: Thu, 29 Jun 2023 22:53:08 +0000
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- Cc: Luca Fancellu <Luca.Fancellu@xxxxxxx>, "michal.orzel@xxxxxxx" <michal.orzel@xxxxxxx>, Julien Grall <jgrall@xxxxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, "sstabellini@xxxxxxxxxx" <sstabellini@xxxxxxxxxx>
- Delivery-date: Thu, 29 Jun 2023 22:53:36 +0000
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- Thread-topic: [v2 4/4] xen/arm: Allow the user to build Xen with UBSAN
Hi Julien,
> -----Original Message-----
> Subject: [v2 4/4] xen/arm: Allow the user to build Xen with UBSAN
>
> From: Julien Grall <jgrall@xxxxxxxxxx>
>
> UBSAN has been enabled a few years ago on x86 but was never
> enabled on Arm because the final binary is bigger than 2MB (
> the maximum we can currently handled).
>
> With the recent rework, it is now possible to grow Xen over 2MB.
> So there is no more roadblock to enable Xen other than increasing
> the reserved area.
>
> On my setup, for arm32, the final binaray was very close to 4MB.
> Furthermore, one may want to enable UBSAN and GCOV which would put
> the binary well-over 4MB (both features require for some space).
> Therefore, increase the size to 8MB which should us some margin.
>
> Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
Reviewed-by: Henry Wang <Henry.Wang@xxxxxxx>
Kind regards,
Henry
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