Hi Joseph,

> On Tue, 4 Feb 2020, Lukasz Majewski wrote:
> 
> > > unix/linux/generic/wordsize-32 cannot be used for armv7, since it
> > > doesn't use asm-generic syscalls.  
> > 
> > Could you elaborate on this?  
> 
> There was a long discussion on the linux-kernel mailing list in 2008,
> much of which was under the subject "microblaze syscall list".
> 
> The conclusion of that discussion was that, whereas architectures for 
> which support was added to the Linux kernel up to that point each had 
> their own syscall ABI (their own syscall numbers, their own set of 
> associated structure layouts and constants - those layouts and
> constants often following those used by some older proprietary Unix
> on the same architecture, in the cases of the oldest Linux kernel
> ports), newer Linux kernel ports would share a common syscall ABI as
> far as possible, meaning the same syscall numbers, constants and
> structure layouts.  This common ABI is known as the generic or
> asm-generic ABI.
> 
> In glibc, sysdeps/unix/sysv/linux/generic is for architectures using
> the asm-generic syscall ABI, and *only* for such architectures
> (which, in the end, did not include microblaze).  This should not be
> confused with other uses of the word "generic" in the glibc context,
> in particular sysdeps/generic/.
> 
> As the Linux kernel arm port was added before 2008, it does not use
> the generic ABI and so cannot use sysdeps/unix/sysv/linux/generic.
> 

Thank you for the explanation.

Considering the above - it would be best to place
setitimer/getitimer/getrusage code into sysdeps/unix/sysv/linux , so
all Linux glibc ports could use them.


Best regards,

Lukasz Majewski

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