Date: Tue, 30 Nov 2004 08:00:14 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/geom geom_pc98.c Message-ID: <200411300800.iAU80EBA069107@repoman.freebsd.org>
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imp 2004-11-30 08:00:14 UTC
FreeBSD src repository
Modified files:
sys/geom geom_pc98.c
Log:
Reject tasting of this provider if the sector size isn't a multiple of
512. If I had an audio cdrom in my cd player when I booted my system,
I'd get a panic from geom because you can't read 8192 bytes from an
audio cdrom.
Remove XXX comment about IPL1 and replace it with some information
from my soon to be published web page on the pc98 disk layout. The
IPL1 test was the result of an observation of a disk with FreeBSD's
boot0 program. It was testing part of an area what appears to be
reserved for a boot loader name, which comes after a jump over this
area. I don't yet know if it is required to be any specific jump
instruction, or if the destination has to be location 11. [1]
[1] FreeBSD Press No. 13, page 115, poorly translated by myself. The
picture there shows offset 8 as the destination of the jump, but
FreeBSD's boot0 program has three padding NULs after the IPL1 name and
uses a 16-bit 'jmp' instruction.
Revision Changes Path
1.50 +6 -3 src/sys/geom/geom_pc98.c
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