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isp driver not 64 bit?
- Subject: isp driver not 64 bit?
- From: dnelson at allantgroup.com (Dan Nelson)
- Date: Mon Nov 29 21:56:15 2004
In the last episode (Nov 29), David Gilbert said:
> Well... cam_calc_geometry seems to get called quite a bit. Almost
> everytime you touch the disk, in fact. fsck'ing a partition calls
> it, for instance.
> Console access is personally expensive (much driving, for instance),
> but from memory the debugging I put in cam_calc_geometry() would
> print before the correct output from dadone(). Your description
> reminds me of this --- but it's no less vexing that the output from
> dadone() has the correct sector and volume size and the ccg in
> cam_calc_geometry() has bogus data.
> I don't know if it's significant, but the correct numbers were:
> 279353684 sectors of 512 bytes
> The ccg structure comes up with:
> 3737169375 sectors of 3737169374 bytes
> Not entirely sensible. Interesting that they're close values.
> However, with different things on the stack, the values changed.
Even more interesting is their hex values:
DEC0ADDF and DEC0ADDE, aka 0xDEADC0DE. Something's reading memory
after the kernel freed it.