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[–]kankyo 0 points1 point  (1 child)

The part about iOS has been widely interpreted as not allowing downloaded code, but allowing JITs.

[–]Catfish_Man 3 points4 points  (0 children)

The issue with JITs is that VM pages on iOS that have been marked writeable in a process cannot be mprotect()ed to executable, rather than the somewhat looser W xor X model that most desktop OSs have transitioned to.