“Standard C++” just specifies `throw` and `catch` (plus what happens when you traverse a block, nothrow declaration etc)
Every implementation has to do something to actually be standard C, and this is an example. It’s rather similar on other hardware, but as far as the standard goes that is irrelevant.
Mainly that exception handling doesn't have a single solution, even in GCC. I'm agreeing with you that this article only highlights one version of exception handling for one compiler.
There's also potential operating system involvement that's not really covered in this article.
Every implementation has to do something to actually be standard C, and this is an example. It’s rather similar on other hardware, but as far as the standard goes that is irrelevant.