On Friday 03 December 2004 8:20 am, Stefan Midjich wrote:
> I know a guy i respect on IRC told me this is not possible but since
> this is the hackers list i thought the topic at least deserves a
> discussion. I guess i wont be able to sit still until someone either
> does it or shows me why it can't be done.
Of course you can. Just attach gdb to your running kernel and muck with the
global boottime structure. That's considered cheating, though, so don't do
it!
( a few minutes later )
Hmm, apparently either something has changed in kgdb in 5.3 or I just forgot
the magic incantation, because it doesn't seem to allow modification of
memory -- just "Bad file descriptor". Getting the address from there and
writing to /dev/kmem directly still works though.
the-cheat# uname -r
5.3-STABLE
the-cheat# uptime
9:03PM up 3485 days, 21:44, 1 user, load averages: 0.24, 0.12, 0.12
the-cheat# sysctl kern.boottime
kern.boottime: { sec = 801120000, usec = 345099 } Mon May 22 00:20:00 1995
the-cheat#
:-P
Craig
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