OSDev.org

Posted: **Fri Aug 20, 2004 5:47 am**

Hey,

Just as the topic says, I need get the contents of EIP and CR1 so that my error handler can print up the state of the machine, I am currently in real mode but it is probably the same no matter what mode your in.

I have tried

Code: Select all

mov   eax, eip/cr1

and I have also tried

Code: Select all

push   eip/cr1
pop   eax

But neither way works??

Cheers.

Posted: **Fri Aug 20, 2004 6:03 am**

XStream wrote: Hey,

Just as the topic says, I need get the contents of EIP and CR1 so that my error handler can print up the state of the machine, I am currently in real mode but it is probably the same no matter what mode your in.

I have tried
Code: Select all
mov   eax, eip/cr1
and I have also tried
Code: Select all
push   eip/cr1
pop   eax
But neither way works??

Cheers.

For eip

Code: Select all

call nearjump
nearjump:
pop eax

CR1 doesn't exist. It's physically not existant in the processor afaik.

If it was, you could read it with mov eax, cr1 (movl %cr1, %eax).

Posted: **Fri Aug 20, 2004 6:44 am**

CR1 is reserved for all purposes, according to the Intel manuals. Even if you could print its values, it wouldn't help anyone anything.

Posted: **Fri Aug 20, 2004 7:31 am**

Thanks guys.

Posted: **Fri Aug 20, 2004 8:53 pm**

Hi,

Candy wrote:
Code: Select all
call nearjump
nearjump:
pop eax

For real mode you might want to use "pop ax" instead of "pop eax"....

Cheers,

Brendan

OSDev.org

Get the Contents of EIP and CR1 in Real Mode

Get the Contents of EIP and CR1 in Real Mode

Re:Get the Contents of EIP and CR1 in Real Mode

Re:Get the Contents of EIP and CR1 in Real Mode

Re:Get the Contents of EIP and CR1 in Real Mode

Re:Get the Contents of EIP and CR1 in Real Mode