Re: [PATCH 3/3] Handle ILP32 AARCH64 correctly for gdbserver

[Andrew Pinski <pinskia at gmail dot com>]

On Wed, Aug 31, 2016 at 5:58 AM, Yao Qi <qiyaoltc@gmail.com> wrote:
> On Wed, Aug 31, 2016 at 11:42 AM, Pedro Alves <palves@redhat.com> wrote:
>> On 08/30/2016 01:25 AM, Andrew Pinski wrote:
>>> In gdbserver, we need to send over 32bit registers
>>> for pc/sp instead of 64bit as we do right now.
>>> So we need another XML file for ILP32.
>>
>> Why do we need to do that?  The raw, architecture register
>> is still 64-bit, right?
>>
>
> I want to ask the same... ILP32 is an ABI, it shouldn't affect the
> review to architecture register.
>
>> Sounds to me that if you want to present a 32-bit pc to the user, then
>> gdb should handle this, via a pseudo register, similarly to how
>> x32 sends 64-bit rip, and then gdb shows a 32-bit pc.   Mips does
>> something like this too, to a larger extent, see mips_register_name.
>>
>
> Why do we need to present a 32-bit pc to the user?  It is 64-bit, and
> I expect a 64-bit value is shown.

Yes understood, fixing that right now.  I will submit a new version later today.

Thanks,
Andrew


>
> --
> Yao (齐尧)