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Date:      Wed, 26 Nov 2003 20:49:01 -0800 (PST)
From:      Jon Passki <cykyc@yahoo.com>
To:        freebsd-stable@freebsd.org
Subject:   Re: BTX halt error: pxe/etherboot voodoo?
Message-ID:  <20031127044901.82928.qmail@web40703.mail.yahoo.com>
In-Reply-To: <20031126033405.82131.qmail@web40708.mail.yahoo.com>

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Self-reply...

Etherboot had an alingment error for 3c90x that was fixed in
5.0.10.  All works!

Take care,

Jon

--- Jon Passki <cykyc@yahoo.com> wrote:
> Hello,
> 
> I have a consistent error involving loader(8)...
> 
> My Compaq Armada M700 laptop is connected through a docking
> station.  The station has a 3Com 3c905c TXM card w/ "Managed PC
> Boot Agent (MBA) v4.00" and PXE 2.00.  The BIOS and NIC are set
> to
> boot from the network first.
> 
> Once booted, I have dhcpd setup with some vendor options to load
> Etherboot's (v5.0.8) pxezloader.  pxezloader then loads the
> boot.menu file, and through the menus I have a choice to boot the
> local harddrive.  Also, I have enabled a more generic option in
> Etherboot to boot the local harddrive.  When either of these
> choices are executed, the following happens:
> 
> -) The boot0 menu appears and selects (or I select) the FreeBSD
> partition
> -) boot2 loads /boot/loader, which then found an exception
> 
> 
> FreeBSD/i386 bootstrap loader, Revision 0.8
> (root@dominique, Mon Sep  8 11:23:25 CDT 2003)
> -
> int=0000000d  err=0000001a  efl=00030202  eip=0000088f
> eax=00000200  ebx=0000000c  ecx=00000e54  edx=00000080
> esi=00000000  edi=00000000  ebp=00000000  esp=00000406
> cs=9d74  ds=0000  es=48ec    fs=0000  gs=0000  ss=9dc2
> cs:eip=cc 40 00 ec 48 00 00 00-00 00 00 00 00 06 02 00
> ss:esp=38 91 00 00 c6 02 00 00-00 00 06 00 00 00 f3 4a
> 
> 
> -) This error does not occur if I interrupt boot2 and have it
> load
> the kernel directly [i.e. 0:ad(0,a)/kernel].  The system boots
> fine
> 
> -) This error does not occur is I directly boot the harddrive by
> either resetting the BIOS or NIC options to boot the local
> harddrive first
> 
> -) This error does not occur if I network boot a diskless FreeBSD
> kernel
> 
> -) The above register values have been the same on all observed
> errors
> 
> The system is a 4.9-PRERELEASE (Oct 26 2003), built on another
> system.  That system had the following in /etc/make.conf:
> CPUTYPE=486
> XFREE86_VERSION=4
> NO_BIND=yes
> NO_OPENSSH=yes
> .undef PERL_VER
> .undef PERL_VERSION
> .undef PERL_ARCH
> .undef NOPERL
> .undef NO_PERL
> 
> Etherboot modifications:
> grep ^CFLAGS Config
> CFLAGS32+=      -DPCBIOS
> CFLAGS32+=      -DASK_BOOT=6 -DANS_DEFAULT=ANS_NETWORK
> CFLAGS32+=      -DALLOW_ONLY_ENCAPSULATED
> CFLAGS32+=      -DBACKOFF_LIMIT=7 -DCONGESTED
> CFLAGS32+=      -DCAN_BOOT_DISK
> CFLAGS32+=      -DTAGGED_IMAGE -DELF_IMAGE
> CFLAGS32+=    -DIMAGE_FREEBSD
> CFLAGS32+=    -DAOUT_IMAGE
> CFLAGS32+=    -DFREEBSD_KERNEL_ENV
> CFLAGS32+=      -Os -ffreestanding -fstrength-reduce
> -fomit-frame-pointer -mcpu=i386
> CFLAGS32+=      -malign-jumps=1 -malign-loops=1
> -malign-functions=1
> CFLAGS32+=      -Wall -W -Wno-format -Wno-unused
> 
> Etherboot build:
> gmake bin32/3c905c-tpo.lzpxe
> cp bin32/3c905c-tpo.lzpxe /tftpboot/
> 
> 
> The only thing that seems off is when pxezloader initially boots,
> it displays its relocation address differently from the Makefile.
> 
> The Makefile has RELOCADDR=0x94000 by default.  When pxezloader
> is
> loaded, it displays (via main.c) reloc=0x9400, missing a zero at
> the end.  I've changed RELOCADDR to 0x74000 and 0x84000, with the
> same exception error and register values.  Both times, though,
> reloc displayed 0x7400 and 0x8400 respectively.  Setting
> RELOCADDR
> to 0x104000 upset Etherboot and it did not build successfully :-)
> 
> Thoughts?
> 
> Jon Passki
> 
> p.s. I'm going to setup another box to exclude hardware issues
> (e.g. flaky memory), just not tonight.  When I do, I'll report
> back.
> 
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