> So? Again, as many others have pointed out, neither do OSes unless you can somehow guarantee they're mapping memory in with an MMU or MPU with flags lacking X

> So? Again, as many others have pointed out, neither do OSes unless you can somehow guarantee they're mapping memory in with an MMU or MPU with flags lacking X/W. You're still trusting the OS to do it right, the linker to do it right, and the language to place symbols in the right sections. If you don't care/understand about the concept of read-only memory I'm not going to be able to convince you of anything. I'll just state that there's a few tens of thousands of people descending on Vegas next week and the longer the wasm community doesn't deal with these issues the louder those people are going to get.