RFR: 8358593: Add ucontext accessors for *BSD on Aarch64

[snake66]

On Thu, 5 Jun 2025 09:41:04 GMT, snake66 <duke at openjdk.org> wrote:

>> That looks fine, thanks. I'm not in a position to check all the BSDs, but I guess it's OK.
>> 
>> It's nice to see someone fixing things for BSD systems.
>
>> That looks fine, thanks. I'm not in a position to check all the BSDs, but I guess it's OK.
> 
> Thanks a lot for the review! My main concern is to not break OSX at this point.
> 
>> It's nice to see someone fixing things for BSD systems.
> 
> It's part of a long journey, but hopefully we can get all the changes upstreamed at some point. This patch helps reduce the out-of-tree patches we have for now. :)

> @snake66 and @theRealAph please remember that non-trivial hotspot changes require two reviews. Thanks.

Aye, thanks for pointing that out. I'll remember next time!

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PR Comment: https://git.openjdk.org/jdk/pull/25640#issuecomment-2954821182