Re: [ros-dev] ReactOS gdt limit

[Alex Ionescu]

The IDT Limit should be 0x7FF, and the GDT limit should be 0x3FF.
I believe ReactOS sets the IDT Limit incorrectly, and perhaps the GDT
as well.
On 17-Apr-08, at 2:33 PM, Henning Schild wrote:
>   Hello ROS dev-team,
>  i am currently working on qemu/kqemu and found that ROS sets the gdt
>  limit to 0x800. At least this is what i see in qemu, i did not check
>  ROS source.
>  http://www.intel.com/design/processor/manuals/253668.pdf (3.5.1 p.
>  3-21)
> >  > the GDT limit should always be one less than
> > an integral multiple of
> > > eight (that is, 8N – 1) 
>  This may or may not be a problem.
>  For all i can say ROS was the only of many different OSs that
>  triggered
>  the check in my setup. I may be wrong and wont investigate this any
>  further. Just wanted to let you know.
>  I used this version:
>  http://prdownloads.sourceforge.net/reactos/ReactOS-0.3.4-REL-qemu.zip
>  and that are the values i saw:
>  base = 0x808bdac0
>  limit = 0x00000800
>  regards,
>  Henning
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Best regards,
Alex Ionescu