PATCH: gdbserver: Clear regcache if buf is NULL
Pedro Alves
pedro@codesourcery.com
Sat Oct 16 20:01:00 GMT 2010
On Friday 01 October 2010 02:51:07, H.J. Lu wrote:
> On Tue, Sep 28, 2010 at 1:23 PM, Pedro Alves <pedro@codesourcery.com> wrote:
> > Hi H.J.. I'm looking at where in the current sources this
> > ended up being used, and not finding it. Am I right in thinking
> > that the need for this was obsoleted when you later tought
> > gdbserver x86-linux about xml descriptions?
> >
>
> i387-fp.c has
>
> if ((x86_xcr0 & I386_XSTATE_SSE))
> {
> int xmm0_regnum = find_regno ("xmm0");
>
> if ((clear_bv & I386_XSTATE_SSE))
> p = NULL;
> else
> p = (char *) buf;
>
> for (i = 0; i < num_xmm_registers; i++)
> {
> if (p)
> p = ((char *) &fp->xmm_space[0]) + i * 16;
> supply_register (regcache, i + xmm0_regnum, p);
> }
> }
>
Thanks, and sorry as for not coming back to this promptly.
Hmm, I don't think I have a way to trigger that.
So is the registers' value really zero, or should gdb
ideally present them as not available (and zero is just a
hack)?
--
Pedro Alves
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