Re: [PATCH v2] Reset errno before PTRACE_PEEKUSER for MIPS DSP_CONTROL

["Maciej W. Rozycki" <macro@codesourcery.com>]

On Wed, 3 Sep 2014, James Hogan wrote:

> > > gdb/:
> > > 	* mips-linux-nat.c (mips_linux_read_description): Reset errno to 0
> > > 	prior to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.
> > > 
> > > gdb/gdbserver/:
> > > 	* linux-mips-low.c (mips_read_description): Reset errno to 0 prior
> > > 	to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.
> > 
> >  This is fine, go ahead and apply it.  Thanks.
> 
> Thanks for reviewing it Maciej.
> 
> This is my first GDB patch submitted upstream (although I have a pile of
> RFC patches for FR=1, FRE=1, MSA support I'm still getting into shape),
> so I don't have push access yet. Is it easy to arrange?

 Sure, that can be arranged, but you need to prove yourself by submitting 
a few more good patches first though.  And assuming you've got a copyright 
assignment in place with FSF, either personally or on behalf of your 
employer (I presume you do, but please confirm as you start sending larger 
changes).  You'll have to speak with one of the general maintainers when 
the right time comes.

 I have applied your change now, thanks.

 BTW, I've had some FR=1 stuff ongoing too, though regrettably stalled 
recently, see:

https://sourceware.org/bugzilla/show_bug.cgi?id=7518
http://sourceware.org/ml/gdb-patches/2012-06/msg00201.html

-- based on an old patch from MIPS Technologies that wasn't quite there, 
but still was a good starting point.  Bare iron only of course as there 
was no FR=1 Linux ABI up until recently.  It will be interesting to see 
how the two pieces compare.  Or actually it may make sense if I push my 
piece first, there was just some concern about regcache that remained
unresolved, so I'll see if I can reintegrate that change against current
trunk, retest and repost.

  Maciej