2003-05-28 02:53:25

by Slack Ware

Subject: Printing IDT on Linux 2.4.20

Hi everybody!
I've a problem with the checkidt utility provided by
Phrack Issue #59, I think.
The checkidt utility is for 2.4.x kernels, supposedly,
but I compiled it under 2.4.20 and it couldn't read
/dev/kmem.
Anyway, I would like to print the IDT on kernel 2.4.20
with checkidt or not.
Any suggestions are welcome.
Regards,


Slack

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2003-05-28 03:07:02

by Zwane Mwaikambo

Subject: Re: Printing IDT on Linux 2.4.20

On Tue, 27 May 2003, Slack Ware wrote:

> Hi everybody!
> I've a problem with the checkidt utility provided by
> Phrack Issue #59, I think.
> The checkidt utility is for 2.4.x kernels, supposedly,
> but I compiled it under 2.4.20 and it couldn't read
> /dev/kmem.
> Anyway, I would like to print the IDT on kernel 2.4.20
> with checkidt or not.
> Any suggestions are welcome.
> Regards,

*shrug* I don't know why they would want to check /dev/kmem just for the
IDT.

#include <stdio.h>

struct dt {
unsigned short limit;
unsigned long address __attribute__((packed));
unsigned short padding;
} __attribute__((packed));

int main()
{
struct dt foo;

__asm__ __volatile__ ("sidt %0":"=m"(foo));
printf("limit=%d address=%lx\n", foo.limit, foo.address);
return 0;
}

Zwane
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