[Qemu-devel] Poking at m68k gitorious branch.

[Rob Landley]

My aboriginal linux project has bootable system images for a bunch of
targets (see http://landley.net/aboriginal/bin) and I want to add m68k.
For years it's been building a stub m68k system image, but the
run-emulator.sh script that should theoretically launch it is just a stub.

A user once got my m68k root filesystem running under the Aranym
emulator, so I know my cross compiler and root filesystem work. But I
haven't got an m68k kernel qemu can boot, or a qemu that can boot it.

A year or so back I poked at the m68k gitorious branch:

  git://gitorious.org/qemu-m68k/qemu-m68k

But it wasn't finished and I got distracted.

I just did a fresh clone of the branch (for some reason pull said I'd
diverged by ~100 commits and there was a conflict?  I'm guessing the
patch series that got posted here, maybe?), built a kernel with the
attached .config and the cross-compiler-m68k from the above aboriginal
binary directory url, and took a wild guess at qemu/kernel command line
arguments, currently just trying to get boot messages on the serial console:

  qemu-system-m68k -nographic -no-reboot -kernel vmlinux \
    -append "console=ttyS0 panic=1"

The result was:

QEMU 1.0,1 monitor - type 'help' for more information
(qemu) QEMU 1.0,1 monitor - type 'help' for more information
(qemu) qemu: fatal: Illegal instruction: 7f45 @ 00000000
D0 = 00000808   A0 = 0021e744   F0 = 7fff ffffffffffffffff
D1 = c4653600   A1 = 0021e6ae   F1 = 7fff ffffffffffffffff
D2 = 27000021   A2 = 00001000   F2 = 7fff ffffffffffffffff
D3 = e768002c   A3 = 00233000   F3 = 7fff ffffffffffffffff
D4 = 00000000   A4 = 00000000   F4 = 7fff ffffffffffffffff
D5 = 00000000   A5 = 00000000   F5 = 7fff ffffffffffffffff
D6 = 00000000   A6 = 00000ff8   F6 = 7fff ffffffffffffffff
D7 = 0022db50   A7 = 00000ff0   F7 = 7fff ffffffffffffffff
PC = 00000000   SR = 2700 ----- Aborted

Which is a bit of a dead end. I'd guess that "vmlinux" isn't the right
binary, except there isn't an arch/m68k/boot directory...

Laurent: do you have any hints for me?

Thanks,

Rob
-- 
GNU/Linux isn't: Linux=GPLv2, GNU=GPLv3+, they can't share code.
Either it's "mere aggregation", or a license violation.  Pick one.

m68kconfig
Description: Text document