It's not privileged in that it can sandbox unprivileged code, it's privileged in that it can run that code at all. Other processes are not allowed to execute wr

It's not privileged in that it can sandbox unprivileged code, it's privileged in that it can run that code at all. Other processes are not allowed to execute writeable memory. MobileSafari has a special "dynamic-codesigning" sandbox entitlement that allows the JIT to function.