Re: PATCH: Extend gdb remote protocol for AVX

H.J. Lu
2008-09-18T19:03:51Z

On Thu, Sep 18, 2008 at 11:34 AM, Daniel Jacobowitz
<dan@codesourcery.com> wrote:
> On Thu, Sep 18, 2008 at 10:27:28AM -0700, H.J. Lu wrote:
>> b. If remote target supports AVX:
>> i. Don't send xmlarch.
>> ii. Replace 128bit xmm registers with 256bit ymm registers in
>> the g/G packet.
>> iii. Gdb will auto-detect SSE unit on remote target, based on the
>> the g/G packet size.
>
> Just a general note: I would much prefer you use the XML mechanism for
> this, either by an architecture name or a property or an explicit
> register description, than add more guesses to the g/G packet checks;
> they're a heuristic for existing remote targets.
>

I tried adding xmlarch to regformats files. But I don't want to add new
xmlarch entry for AVX since I had to create a new arch entry in BFD for it. It
isn't necessary for this purpose. If I use the existing xmlarch, like
i386:x86-64, it will match regformats/reg-x86-64.dat. Using
the g/G packet size allows me not to add a new arch entry in BFD.
Is there a way to do it with XML without changing BFD?

Thanks.

--
H.J.