But aren't they within the same process? (I'm asking an honest question - I know nothing of iOS internals). Doesn't that imply that the JIT has privileged acc

But aren't they within the same process? (I'm asking an honest question - I know nothing of iOS internals). Doesn't that imply that the JIT has privileged access to pages that other code within the same process does not? As saurik (who knows about these things) mentions elsewhere, Apple can trust Safari to not tamper with the executable pages - can they trust 3rd party apps? Home-screen based web-apps being another question entirely.