On Tue, Jun 13, 2023 at 07:57:37PM +0000, Edgecombe, Rick P wrote:

For alt shadow stack's, this is what I came up with:
https://lore.kernel.org/lkml/20220929222936.14584-40-rick.p.edgecombe@intel.com/ (local)

Unfortunately it can't work automatically with sigaltstack(). Since it
has to be a new thing anyway, it's been left for the future. I guess
that might have a better chance of being cross arch.

Yeah, I've not seen and can't think of anything that's entirely
satisfactory either.  Like Szabolcs says I do think we need a story on
this.

BTW, last time this series accidentally broke an arm config and made it
all the way through the robots up to Linus. Would you mind giving
patches 1-3 a check?

I'm in the middle of importing the whole series into my development
branch, but note that I'm only really working with arm64 not arm so
might miss stuff the bots would hit.  Hopefully there should be some
Tested-bys coming for arm64 anyway.