Re: [RFA] i386 segment base support

[Hui Zhu <teawater@gmail.com>]

On Thu, May 20, 2010 at 16:19, Mark Kettenis <mark.kettenis@xs4all.nl> wrote:
>> From: Hui Zhu <teawater@gmail.com>
>> Date: Thu, 20 May 2010 15:34:17 +0800
>>
>> Hi guys,
>>
>> I update the old patch that I post to support segment base value.
>
> Sorry, but we still need to discuss what programming model you intend
> to support before I will consider looking at diffs.
>
> Currently, on i386, GDB supports a fully flat 32-bit model, with one
> small exception on platforms that support thread-local-storage.  In
> that model you can assume that all the segment bases are 0 except for
> %gs.  If that's all that people are interested in, I don't think we
> should bother with segment bases for %cs, %ds, %es, %fs and %ss.
>
> If people want to support fully segmented memory in GDB, then what you
> propose is probably not enough, at least not for 32-bit mode.
>

I have a very, very need the value of segment base register.  Do you
have some good idea to put this value from target part
(i386-linux-nat) to gdbarch part (prec)?

Thanks,
Hui