Re: [PATCH] target/sh4: Avoid shift into sign bit in update_itlb_use()

[Philippe Mathieu-Daudé]

On 23/7/24 19:24, Peter Maydell wrote:
> In update_itlb_use() the variables or_mask and and_mask are uint8_t,
> which means that in expressions like "and_mask << 24" the usual C
> arithmetic conversions will result in the shift being done as a
> signed int type, and so we will shift into the sign bit. For QEMU
> this isn't undefined behaviour because we use -fwrapv; but we can
> avoid it anyway by using uint32_t types for or_mask and and_mask.
>
> Resolves: Coverity CID 1547628
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>   target/sh4/helper.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>