Re: Extended error reporting to user space?

[Andi Kleen]

> I'd wondered about some form of halfway house where the error
> value is expanded but could be truncated for compatibility - i.e.

Who would do the truncation?

> if at the moment we had:
> 
>     return -EINVAL;
> 
> it would become:
> 
>     return ERRORNUM(EINVAL, BADLENGTH);

x86 only has about 12 bits in the current ABI btw.

-Andi
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