. See below.
It is so obvious once you see it. :)
Thanks.
Jun
-
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Date: Fri, 01 Dec 2006 14:35:09 +0200
Subject: failed 'ljmp' in linear addressing mode
hello,
just saw your post on lkml. your original problem was that when you
executed the
linux-os (Dick Johnson) wrote:
Get a copy of the Intel 486 Microprocessor Reference Manual or read it on-
line. There is no way that you can make a call like that. You would need to
call through a task-gate or otherwise set the code-segment and the instruction
pointer at the same instant. First,
On Tue, Nov 28, 2006 at 05:40:56PM -0800, Jun Sun wrote:
>
> Can you elaborate more why this last ljmp will fail? I thought at this point
> the paging is turned off, and 0x1000- would simply mean a physical
> address - which is a valid physical address in RAM, btw.
>
I finally got it workin
On Tue, Nov 28, 2006 at 06:49:17PM -0500, linux-os (Dick Johnson) wrote:
>
> On Tue, 28 Nov 2006, Jun Sun wrote:
>
> > On Tue, Nov 28, 2006 at 08:46:44AM -0500, linux-os (Dick Johnson) wrote:
> >>
> >> On Mon, 27 Nov 2006, Jun Sun wrote:
> >>
> >>>
> >>> On Mon, Nov 27, 2006 at 08:58:57AM -0500,
On Tue, 28 Nov 2006, Jun Sun wrote:
> On Tue, Nov 28, 2006 at 08:46:44AM -0500, linux-os (Dick Johnson) wrote:
>>
>> On Mon, 27 Nov 2006, Jun Sun wrote:
>>
>>>
>>> On Mon, Nov 27, 2006 at 08:58:57AM -0500, linux-os (Dick Johnson) wrote:
I think it probably resets the instant that you tu
On Tue, Nov 28, 2006 at 08:46:44AM -0500, linux-os (Dick Johnson) wrote:
>
> On Mon, 27 Nov 2006, Jun Sun wrote:
>
> >
> > On Mon, Nov 27, 2006 at 08:58:57AM -0500, linux-os (Dick Johnson) wrote:
> >>
> >> I think it probably resets the instant that you turn off paging. To
> >> turn off paging, y
On Mon, 27 Nov 2006, Jun Sun wrote:
>
> On Mon, Nov 27, 2006 at 08:58:57AM -0500, linux-os (Dick Johnson) wrote:
>>
>> I think it probably resets the instant that you turn off paging. To
>> turn off paging, you need to copy some code (properly linked) to an
>> area where there is a 1:1 mapping be
On Mon, Nov 27, 2006 at 08:58:57AM -0500, linux-os (Dick Johnson) wrote:
>
> I think it probably resets the instant that you turn off paging. To
> turn off paging, you need to copy some code (properly linked) to an
> area where there is a 1:1 mapping between virtual and physical addresses.
> A sa
On Wed, 22 Nov 2006, Jun Sun wrote:
>
> I am plowing along as I am learning about the in'n'outs about i386. I am
> totally stuck on this one. I would appreciate any help.
>
> As you can see, the function turns off paging mode (of course it
> runs from identically mapped page) and tries to jump
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