Where to find amd64 ABI information for FreeBSD?

[Xin LI]

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Hi,

Is there a place to find ABI information for GCC on FreeBSD?
 Specifically, I'm looking for which registers has to be preserved
across function call?  (Or do we follow System V Application Binary
Interface AMD64 Architecture Processor Supplement Draft Version 0.99.5?)

Thanks in advance!

Cheers,
- -- 
Xin LI <delphij at delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!	       Live free or die
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