NFC cleanups #547
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NFC cleanups #547
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Make it easier to justify our avoidance of capptr_from_client and capptr_reveal in external_pointer by performing address_cast earlier. In particular, with this change, we can see that the pointer (and so its authority, in CHERI) is not passed to any called function other than address_cast and pointer_offset, and so authority is merely propagated and neither exercised nor amplified. Remove the long-disused capptr_reveal_wild, which was added for earlier versions of external_pointer.
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No urgency, but I did these while performing other refactorings that are stalled for a bit, and there's no reason not to make a PR out of them. Hopefully an easy review.
conceptsaway fromConceptFootoIsFoo.capptr_from_clientandcapptr_revealinexternal_pointerand drop the unusedcapptr_reveal_wild.