Problem booting l4linux

Frank Mehnert fm3 at
Fri Jun 10 14:54:15 CEST 2005

On Friday 10 June 2005 14:15, fabs0028 at 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/
>  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


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.

## Dept. of Computer Science, Dresden University of Technology, Germany ##
##                                     ##
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
URL: <>

More information about the l4-hackers mailing list