Latest CVS: disklabel broken?
Jeremy Chadwick
freebsd at jdc.parodius.com
Thu Jul 29 18:53:22 PDT 2004
I can confirm that going back to an older set of bootblocks (prior to
gcc 3.4) fixes the problem. In my case, I used bootblocks taken
from a fresh install of 5.2.1-RELEASE.
I'm in the middle of trying to use PXE to get one of the servers up
and working via the same manner, but serial console in the kernel is
making it a real pain in the arse...
I'll give your patch a try and report back hopefully shortly (sometime
in the next few hours, tops).
--
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. |
On Fri, Jul 30, 2004 at 12:39:49AM +0000, Alexander Kabaev wrote:
> On Thu, Jul 29, 2004 at 05:14:44PM -0700, Jeremy Chadwick wrote:
> > Minor typo/clarification: the transition problem lies between boot1
> > and boot2, it seems.
> >
> > On one of the machines (which uses boot1 across serial console),
> > the system reports "Invalid partition" when trying to boot from --
> > and yes, this is not a typo -- 0:ad(0,`). Manually typing in the
> > correct device (which is 0:ad(0,a)) causes the machine to spit out
> > an exception error and reboot automatically.
> >
> > Just wanted to clarify on that point.
> >
>
> GCC 3.4 seems to be very likely cause of this problem. I guess your only
> option is to get boot2 file from a system which predates GCC 3.4 and
> install in on broken boxes.
>
> I am trying to find the likely cause of this failure. The very first
> idea I managed to think of is that your problem is yet another fallout
> from new GCC unit-at-a-time optimisation mode. Could you please test
> an attached patch and report results here?
>
>
> Index: Makefile
> ===================================================================
> RCS file: /home/ncvs/src/sys/boot/i386/boot2/Makefile,v
> retrieving revision 1.55
> diff -u -r1.55 Makefile
> --- Makefile 17 Feb 2004 07:13:03 -0000 1.55
> +++ Makefile 30 Jul 2004 00:31:37 -0000
> @@ -22,6 +22,7 @@
>
> CFLAGS= -Os \
> -fno-guess-branch-probability -fomit-frame-pointer\
> + -fno-unit-at-a-time \
> -mno-align-long-strings \
> -mrtd \
> -D${BOOT2_UFS} \
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