Id start with ARM first. Its a lot easier to pick up and is a lot easier than x86. Also take a look at the C++ itanium abi. It can be found on the GCC website.

Id start with ARM first. Its a lot easier to pick up and is a lot easier than x86. Also take a look at the C++ itanium abi. It can be found on the GCC website. It explains the rules of going from C++ to assembly.