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Re: RFC: Support target specific qSupported


On Feb 3, 2010, at 3:05 PM, H.J. Lu wrote:

> On Wed, Feb 3, 2010 at 5:58 AM, Daniel Jacobowitz <dan@codesourcery.com> wrote:
>> On Tue, Feb 02, 2010 at 08:03:39PM -0800, H.J. Lu wrote:
>>> Hi,
>>> 
>>> Intel AVX has 256bit YMM registers. XMM registers from SSE are the
>>> aliases of the lower 128bit YMM registers. gdbserver on AVX machine
>>> may use 256bit vector registers, instead of 128bit vector registers,
>>> in the g/G packet.  When gdb talks to gdbserver, they need to negotiate
>>> to find out the maxium common register size supported by both gdb and
>>> gdbserver. I added `x86:xstate=BYTES:xcr0=VALUE' to qSupported:
>> 
>> Have you seen the Target Descriptions chapter in the manual?  This is
>> exactly what it was designed to do.
>> 
> 
> Which gdb target does similar things I need for AVX?

I think that powerpc does.  Its general purpose registers may be 32 bits wide (standard powerpc) or
64 bits (either powerpc64 or spe variants).

Tristan.


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