[PATCH] arm64: signal: Update sigcontext reservations table

[Mark Brown]

On Tue, Sep 03, 2024 at 03:18:25PM +0100, Dave Martin wrote:
> On Fri, Aug 23, 2024 at 12:46:05PM +0100, Will Deacon wrote:

> > I suppose we could, but I must confess that I find this comment a lot
> > easier to digest that the fiddly maze of inconsistent macros we have
> > for the different contexts. Then again, all that really matters, I
> > suppose, is that we don't accidentally over-allocate the maximum size
> > of the sigcontext. That ought to be enforceable.

...

> I think my best approach for now would be to try to wire up something
> that at least helps remind us that we need to review this table when
> something new is added in the sigframe, unless you can think of a
> better idea.

It be good to add a selftest that flags this, that way people might
notice when adding things and if we miss something it'll probably turn
up in one of the CIs at some point (possibly after it's too late but at
least we'd know).  That'd give us some level of integration test with
whatever libcs and other default software are actually doing, as opposed
to what we think they'll do.
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