Bug in MIPS strncpy

[Jeff Johnston]

Perry McFarlane wrote:
> I found a bug in the MIPS-optimized strncpy
> (newlib/libc/machine/mips/strncpy.c)
> There is an unrolled loop to read from the source string 4 bytes at a
> time, but this could read past the \0 and cause a SEGV.
>
> The MIPS-optimized strncpy was added as part of this patch:
> http://sourceware.org/ml/newlib/2001/msg00594.html
>
> I suppose that it could be fixed by only reading groups of 4 bytes that
> are word-alligned.
>   
I have created a patch.

-- Jeff J.
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