Where is the SysV style C ABI defined if we wanted to go read more about it? Or, do you have a favorite reference for a work explaining it's design choices?
I'm interested in soft processors on FPGAs and their tools, and that sounds like it might make for good reading.
Nobody actually uses System V anymore, but because it's the thing other Unixy systems are based on, people keep extending the SysV ABI standard to processors ridiculously more powerful than System V itself could ever hope to run on.
As best I can make out, the only relevant portions of the original SysV ABI document are chapters 4 and 5, still available and maintained on the SCO website:
I'm interested in soft processors on FPGAs and their tools, and that sounds like it might make for good reading.