[PATCH 6/9 v2] Implement mount namespace support for native Linux targets

[Gary Benson]

Pedro Alves wrote:
> On 04/30/2015 01:05 PM, Gary Benson wrote:
> > This commit allows GDB to access executables and shared libraries
> > on native Linux targets where GDB and the inferior have different
> > mount namespaces.
> 
> > +/* Implementation of to_fileio_open.  */
> > +
> > +static int
> > +linux_nat_fileio_open (struct target_ops *self,
> > +		       struct inferior *inf, const char *filename,
> > +		       int flags, int mode, int *target_errno)
> > +{
> > +  int nat_flags;
> > +  int fd;
> > +
> > +  if (fileio_to_host_openflags (flags, &nat_flags) == -1)
> > +    {
> > +      *target_errno = FILEIO_EINVAL;
> > +      return -1;
> > +    }
> > +
> > +  /* We do not need to convert MODE, since the fileio protocol
> > +     uses the standard values.  */
> 
> Hmm, I'm not seeing how the fileio constants have to necessarily
> match the host's.  So I don't understand this comment.  What
> are these standard values?

Hmmm, I just copied this from inf_child_fileio_open.  Maybe I should
fix that first, with some convertor function that the compiler can
essentially optimize away *if* the values really do match.

> Otherwise this looks good to me.  I'll leave the "set debug" flag's
> name up to you.

Cool, thanks.

Cheers,
Gary

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