coreinfo "General Protection Fault Exception"

[Maxime de Roucy]

Hello,

On a pcengines apu1 when I tried to leave coreinfo (press ESC) I get a
"General Protection Fault Exception".

I attached my .config file of coreinfo (it's the default configuration)
and the console output when coreinfo crash.

[Maxime de Roucy]

Le dimanche 06 septembre 2015 à 16:20 +0200, Maxime de Roucy a écrit :
> Hello,
>
> On a pcengines apu1 when I tried to leave coreinfo (press ESC) I get 
> a "General Protection Fault Exception".

I forget to mention I build coreinfo on a x86_64 Archlinux with :

cd …/coreboot/payloads/coreinfo
make LIBPAYLOAD_DIR=../libpayload/install CC=…/coreboot/util/crossgcc/xgcc/bin/i386-elf-gcc

[Marc Jones]

It looks like coreinfo is the only payload, so there is nothing to exit
back to. What were you expecting to happen?

You can try using seabios with multiple payloads or work with bayou as a
multiple payload loader.

Marc

On Thu, Sep 10, 2015 at 12:54 AM Maxime de Roucy 
wrote:
> Hello,
>
> On a pcengines apu1 when I tried to leave coreinfo (press ESC) I get a
> "General Protection Fault Exception".
>
> I attached my .config file of coreinfo (it's the default configuration)
> and the console output when coreinfo crash.
> --
> Regards
> Maxime de Roucy--
> coreboot mailing list: [e-mail]
> http://www.coreboot.org/mailman/listinfo/coreboot

[Paul Menzel]

Dear Maxime,

Am Sonntag, den 06.09.2015, 16:20 +0200 schrieb Maxime de Roucy:
> On a pcengines apu1 when I tried to leave coreinfo (press ESC) I get a
> "General Protection Fault Exception".
>
> I attached my .config file of coreinfo (it's the default 
> configuration) and the console output when coreinfo crash.

does that also happen, when using the same payloads files with QEMU?

If yes, maybe it can be better debugged there.

Thanks,

Paul

[Maxime de Roucy]

Le vendredi 11 septembre 2015 à 22:20 +0200, Paul Menzel a écrit :
> does that also happen, when using the same payloads files with QEMU?
> If yes, maybe it can be better debugged there.

I rebuild coreboot with a qemu target and debug enabled.
I also rebuild coreinfo with "-g" added to the CFLAGS.

The problème appear 3~4 seconds after coreinfo is launched.
Before I even do anything… (I didn't press ESC).

I rebuild coreinfo and sgabios in a full 32 bits environnement but that
doesn't change anything.

I tried to debug the problem on gdb.
It appear on the second launch of getch but I didn't figured where
exactly.

I upload the rom and elf.debug (and sources) of coreinfo on my server
if someone want to take a look :
http://ftp.craoc.fr/coreboot-debug/

To launch it :
1$ qemu-system-i386 -M q35 -bios coreboot.rom -hda /dev/zero -nographic -s -S

2$ gdb --tui
(gdb) target remote localhost:1234
(gdb) file ../payloads/coreinfo/build/coreinfo.elf.debug
(gdb) b main
(gdb) c
[gdb will stop here but it's wrong, you have to continu]
(gdb) c

in qemu press "ESC" and select "4 payload[coreinfo]".
gdb should stop at the begining of the main function of coreinfo.