ABI choice in adding new syscall

[Marcelo Silva Freitas]

Hi,

I am studing how to add new syscall to the kernel.
When editing the file syscall_64.tlb there are 3 choices for the ABI: 64,
common, x32
I have read about and I don't found clearly the meaning and effect of
'common' choice.
In what imply this choice?

Thanks,

Marcelo.
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