Problem booting l4linux

Frank Mehnert fm3 at os.inf.tu-dresden.de
Fri Jun 10 14:54:15 CEST 2005


On Friday 10 June 2005 14:15, fabs0028 at free.fr wrote:
> Hello
>
> I 'm trying to boot my fresh l4linux, i used the following entry in grub as
> adam previously told me to.
>
> title L4/Linux
> root (hd0,0)
> kernel /l4linux/rmgr -sigma0 task modname "L4Linux task" task modname
> "bmodfs" module module module
> modaddr 0x02000000
> module /l4linux/fiasco -nowait -nokdb -serial_esc -comspeed 115200 -comport
> 1 module /l4linux/sigma0
> module /l4linux/names
> module /l4linux/log
> module /l4linux/dm_phys
> module /l4linux/simple_ts -t 300
> module /l4linux/l4io --noirq
> module /l4linux/bmodfs
>  module /l4linux/libloader.s.so
>  module /l4linux/run-l4
>  module /l4linux/vmlinuz26
> module /l4linux/l4exec
> module /l4linux/loader --fprov=BMODFS run-l4
>
>
>
> It starts but i get the following error messages :
>
> simplets|configured for 300 tasks
> bmodfs  | L4RM: [PF] read at 0x00000000, eip 0122c495, src A.01
> bmodfs  | [A.0] l4rm/lib/src/pagefault.c:78:__unknowm_pf():
> bmodfs  |  unhandled page fault
>
>
>
> It seems to be a problem with a null pointer and i'm sure it is a problem
> in my grub file but i don't know what's wrong. I tried to change some
> options but i always get this problem but it is not always the same server
> that crashes, it depends on my options.

This bug report lacks of many information. Please start with debugging
at the faulting eip: Press the ESC key and type

  uta<space>122c495<space

You will (hopyfully) see a disassembler listing. If there are line numbers
included into the listing, fine. If not, disassemble your bmodfs with

  objdump -ld bmodfs | less

and search for the faulting eip. You have to find out the relation between the
faulting eip and the source line.

Frank
-- 
## Dept. of Computer Science, Dresden University of Technology, Germany ##
## http://os.inf.tu-dresden.de/~fm3                                     ##
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