[PATCH 2/3 v2] Define _KMEMUSER in arm-nbsd-nat.c

[Christian Biesinger via gdb-patches]

Hi Kamil,

I have a related question. NetBSD applied this patch:
https://www.mail-archive.com/tech@openbsd.org/msg44100.html

Do you know which NetBSD version that shipped in? Can we apply that
patch to GDB as-is or should we attempt to support the older struct
layout as well?

Thanks,
Christian

On Fri, Jan 24, 2020 at 3:29 PM Kamil Rytarowski <n54@gmx.com> wrote:
>
> On 24.01.2020 15:18, cbiesinger@chromium.org wrote:
> > From: Christian Biesinger <cbiesinger@google.com>
> >
> > Fixes the below compile error on ARM NetBSD 9.0_RC1 (the only version I
> > tested).  types.h does not define register_t by default.
> >
> > We already use this define elsewhere, notably in bsd-kvm.c.
> >
> > In file included from ../../gdb/arm-nbsd-nat.c:28:
> > /usr/include/machine/frame.h:54:2: error: unknown type name 'register_t'; did you mean '__register_t'?
> >         register_t tf_spsr;
> >         ^
> > /usr/include/machine/types.h:77:14: note: '__register_t' declared here
> > typedef int             __register_t;
> >                         ^
> >
> > There are other compile errors that this does not fix.
> >
> > gdb/ChangeLog:
> >
> > 2020-01-24  Christian Biesinger  <cbiesinger@google.com>
> >
> >       * arm-nbsd-nat.c: Define _KMEMUSER to get the declaration of
> >       register_t.
> >
> > Change-Id: I82c21d38189ee59ea0af2538ba84b771d268722e
> > ---
> >  gdb/arm-nbsd-nat.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/gdb/arm-nbsd-nat.c b/gdb/arm-nbsd-nat.c
> > index 00f919194b..4844b51a3c 100644
> > --- a/gdb/arm-nbsd-nat.c
> > +++ b/gdb/arm-nbsd-nat.c
> > @@ -17,6 +17,8 @@
> >     You should have received a copy of the GNU General Public License
> >     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
> >
> > +/* We define this to get types like register_t.  */
> > +#define _KMEMUSER
> >  #include "defs.h"
> >  #include "gdbcore.h"
> >  #include "inferior.h"
> >
>
> While gdb is the right user for _KMEMUSER, here we should probably go
> for -D_KERNTYPES as it is the canonical symbol for register_t.
>