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Re: [PATCH] x86: avoid Misra Rule 19.1 violations
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 31 Jul 2023 14:18:03 +0100
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- Cc: Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Roberto Bagnara <roberto.bagnara@xxxxxxxxxxx>, Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- Delivery-date: Mon, 31 Jul 2023 13:18:21 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 17/07/2023 3:13 pm, Jan Beulich wrote:
> Not exactly overlapping accesses to objects on the left and right hand
> sides of an assignment are generally UB, and hence disallowed by Misra.
> While in the specific cases we're talking about here no actual UB can
> result as long as the compiler doesn't act actively "maliciously", let's
> still switch to using casts combined with exactly overlapping accesses.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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