Get the Contents of EIP and CR1 in Real Mode

[XStream]

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.

[Candy]

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).

[Solar]

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

[XStream]

Thanks guys.

[Brendan]

Hi,

Code: Select all

call nearjump
nearjump:
pop eax

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


Cheers,

Brendan