Re: [Qemu-devel] problems with freeBSD

[Kevin O'Connor <kevin@koconnor.net>]

On Thu, Mar 07, 2013 at 12:12:08AM +0100, Aurelien Jarno wrote:
> On Wed, Mar 06, 2013 at 08:21:11AM +0000, Dietmar Maurer wrote:
> > Using qemu 1.4.0:
> > 
> > # qemu -hda test.raw -m 512 -cdrom pfSense-LiveCD-2.0.2-RELEASE-amd64-20121207-2239.iso
> > 
> > Results in:
> > 
> > trap 12: page fault while in kernel mode
> > ...
> > stopped at x86bios_emu_rdw+0x2f: movzwl (%rbx),%eax
> > 
> > Any ideas? Can somebody reproduce that?
> > 
> > To get the FreeBSD VM boot use the console, enter the boot loader, then:
> > # set hint.atkbd.0.disabled="1"
> > # boot
> > 
> > But that disables the keyboard.
> 
> I was actually digging about that problem. It is indeed present in
> version 1.4.0, but is fixed in the current git master. The problem is
> actually not directly in QEMU but in seabios, the update to version
> 1.7.2.1 commit 5c75fb10) fixes the issue. Maybe it is worth 
> cherry-picking it into stable-1.4 (hence the Cc:). In the meantime
> using bios.bin from master with QEMU version 1.4.0 should also fix the
> issue.
> 
> What is strange is the seabios commit fixing the issue:
> 
>     commit 4219149ad2b783abfa61e80e9e9f6910db0c76c9
>     Author: Kevin O'Connor <kevin@koconnor.net>
>     Date:   Sun Feb 17 10:56:10 2013 -0500
>     
>         build: Don't require $(OUT) to be a sub-directory of the main directory.

That change is definitely just build related - I don't see how it
could impact the final SeaBIOS binary.  How did you conclude that this
commit is what fixes the issue?

-Kevin