[coreboot] build failure: cannot move location counter backwards

[Darren Hart]

On 06/20/2011 04:09 PM, Cristian Măgherușan-Stanciu wrote:
> Hi,
> 
> I documented the latest developments (git and crossgcc) at
> http://www.coreboot.org/Build_HOWTO. Please someone double-check.

My build succeeded following these instructions. As a first-time user,
it would be helpful to have a quick-start guide which would be basically
this wiki page + the steps necessary to do boot what I built in qemu.
There are bits of that here:

http://www.coreboot.org/QEMU

So perhaps a link, although it is a bit unclear to me which bits of what
I built get used when I try to boot searbios in qemu. I don't seem to
need corebios.rom at all, just the seabios bios.bin:

$ qemu -bios ./payloads/external/SeaBIOS/seabios/out/bios.bin -hda
/dev/zero -serial stdio

I get an option to press F12 in the console and select a boot device.
Seems to work.

Am I using coreboot? Is it integrated into the payload? Reading the
QEMU_Build_tutorial, http://www.coreboot.org/QEMU_Build_Tutorial, led me
to try:

$ qemu -bios build/coreboot.rom -hda /dev/zero -serial stdio

This resulted in something else entirely, the shell output terminating
in the following:

coreboot memory table:
 0. 0000000000000000-0000000000000fff: CONFIGURATION TABLES
 1. 0000000000001000-000000000009ffff: RAM
 2. 00000000000c0000-0000000017feffff: RAM
 3. 0000000017ff0000-0000000017ffffff: CONFIGURATION TABLES
 4. 00000000ff800000-00000000ffffffff: RESERVED
Wrote coreboot table at: 17ff1400 - 17ff15c4  checksum 6c1c
coreboot table: 452 bytes.
Multiboot Information structure has been written.
 0. FREE SPACE 17ff3400 0000cc00
 1. GDT        17ff0200 00000200
 2. IRQ TABLE  17ff0400 00001000
 3. COREBOOT   17ff1400 00002000
Check CBFS header at fffcfc39
magic is 386f92fa
ERROR: No valid CBFS header found!
CBFS:  Could not find file fallback/payload
Boot failed.

It isn't clear to me from the various pages I've read which of the above
(if either) is the appropriate way to boot coreboot on qemu. Can anyone
clear that up for me?


-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel