Re: memory range R/W triggered breakpoints in kernel ?

From: Pavel Machek
Date: Mon Mar 06 2006 - 16:58:34 EST


On Ne 05-03-06 18:32:02, Benjamin LaHaise wrote:
> On Mon, Mar 06, 2006 at 12:31:29AM +0100, Mateusz Berezecki wrote:
> > Yes but again this is userspace. I was thinking about solution used
> > back in the old days in SoftICE kernel level debugger.
> > It had a BPR command (breakpoint on range) which could monitor
> > up to 400000 bytes of memory range. Unfortunately for me this command
> > works in very old versions of _that_ other OS.
>
> If it is in userspace, then you don't need anything from the kernel.
> mprotect() and catch the resulting SIGSEGV.

SoftICE worked on kernel, too. Not sure how it was hacked up.

Pavel
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