And implemented on every Unix system I've come across. And has
performance advantages over raising SEGV (not just in the raising, but
also in the transparent capturing in userspace libraries).
> Syscalls are not required to report EFAULT, or do anything else, as
> invalid input is completely undefined. Naturally it is a
> quality-of-implementation issue that invalid inputs be reported in
> some manor.
>
> SIGSEGV is an appropriate response.
But so is EFAULT. And EFAULT has legitimate advantages.
> And something that I'd like to see as an option in the kernel.
> You'll flush out more errors putting the signalling code there than
> doing it in user space. Plus we'd be better able to accurately
> report the faulting address, which is extremely useful information.
I've already said several times that I have no problem with such an
option. All I am saying is that EFAULT should not be forcefully
removed from Linux.
Regards,
Richard....
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