[cesarb]

> Apple changed some things that impact PyPy, like the register uses and ffi calling conventions.

I thought everyone who used 64-bit ARM used ARM's AAPCS64 (https://github.com/ARM-software/abi-aa/blob/master/aapcs64/a...), so the register usage and FFI calling convention should be the same as on Linux and Windows. What did Apple do differently that would affect the PyPy JIT?

[mattip]

There are some slight nuances that affect the JIT. https://developer.apple.com/documentation/xcode/writing_arm6...

[a1369209993]

Link is broken; asks user to enable remote code execution.

[saagarjha]

Please don’t call working links “broken”. It links to the right place, regardless of whether you like what happens when you get there.

[saagarjha]

In addition to a slightly modified ABI, Apple enforces W^X in hardware.