Exception handling implementation information

[John Fine]

Andrew Haley wrote:
>
> The spec is at
> http://www.codesourcery.com/public/cxx-abi/abi-eh.html
>
>
>   
Thanks, I also wanted similar info and haven't found time to even search.
But like a lot of similar documents that says "Itanium" and I'm 
interested in x86-64.
I haven't taken the time to study that one yet, but other documents 
where "Itanium" is used as the standard make it very hard to guess which 
details remain the same in x86-64 vs. which details get changed for x86-64.
Short of the source code, is there any documentation (on exception 
handling) either for x86-64 specifically or for the differences between 
x86-64 and Itanium?