Re: ååï Re: ååï Re: ååï Re: ååï Status of 'unicore32' architecture in Linux kernel

[Guenter Roeck]

On 09/04/2014 11:13 PM, Xuetao Guan  wrote:
> ----- Guenter Roeck <linux@xxxxxxxxxxxx> åéï
> > On 09/03/2014 01:32 AM, Xuetao Guan  wrote:
> > >
> > [ ... ]
> >
> > > > Please try the following patch. That seems to do it.
> > > > I am sure it can be improved, but it is a start.
> > > >
> > > > Thanks,
> > > > Guenter
> > >
> > > Thanks. I'll test it.
> > > BTW, Qemu codestyle is different, and tab should be replaced with blanks.
> >
> > Here is where I am. User space code (busybox) was compiled
> > using the unicore toolchain available on the web.
> >
> > ...
> > serio: i8042 KBD port at 0x6eb00060,0x6eb00064 irq 22
> > mousedev: PS/2 mouse device common for all mice
> > Enable UniCore-F64 support.
> > Warning: unable to open an initial console.
> > Freeing unused kernel memory: 1156K (c0408000 - c0529000)
> >
> > Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> >
> > ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> >
> > The kernel tries to execute the init program, which fails with SIGSEGV.
> > I confirmed that the init program is loaded and starts to execute.
> >
> > Any idea what might cause such a problem ?
> >
> > Thanks,
> > Guenter
> 'slink /init             /bin/busybox 777 0 0' should be inserted in initramfs config
> Also, I recommend compile busybox statically for initramfs.
>
> I need more information, including full kmsg and initramfs configs

Hi,

I made everything I have available at http://server.roeck-us.net/qemu/unicore32/.
I tried multiple variants for creating the root file system, including the one
on https://github.com/gxt/UniCore32.git and the one using mkrootfs.sh in
the link above. No difference - I always see the same crash. Note that the
'init' program is loading, but crashes with above error (0x0000000b is SIGSEGV
unless I am missing something).

Note that I used the latest qemu for unicore from upstream sources; I was unable
to compile it from git@xxxxxxxxxx:gxt/QEMU.git. Qemu configuration did not seem
to make a difference. The toolchain was extracted from uc4-1.0.5-hard.tgz.

Hope this helps,
Guenter

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