The ultimate HOW-TO

[Adam Lackorzynski]

On Fri Aug 10, 2007 at 09:43:36 -0700, ComputerScienceStudent wrote:
> 
> 
> Adam Lackorzynski wrote:
> > 
> >> Now, the output on screen seems to be the same! :confused:
> >> After the loading of the modules it reports these lines:
> >> 
> >> 
> >> .
> >> .
> >> .
> >> Relocated mbi to [0x2000-0x240c]
> >> Loading ╝☺
> >> => can't load module (no ELF executable)
> >> Loading
> >> Loading
> >> find kernel info page...
> >> could not find kernel info page, maybe your kernel is too old
> >> 
> >> Key press reboots...
> >> 
> >> Maybe the l4env aren't too updated and I've to download, compile and
> >> build
> >> the  http://os.inf.tu-dresden.de/download/snapshots/ hello package  with
> >> the
> >> updated fiasco? So I use the module fiasco that this compiling/building
> >> produces -probably is newer and better?-..
> > 
> > If you used svn you should have recent enough sources.
> > 
> > Your output looks really strange, as bootstrap would try to load garbled
> > memory. There should be some paths after 'Loading'. 
> 
> ..I've notice that I didn't patch GRUB.. maybe the problems start here.. so:

You don't necessarily need a patch GRUB. You can use the
-modaddr 0x2000000 command line option to bootstrap to achieve the same
as with the modaddr GRUB command.

>     a) The version is 0.97
>     b) To patch there are to download it, download the latest patch
> (grub-0.97-os.5.diff) and do:
>              I - patch -p0 < grub-0.97-os.5.diff
>             II - ./configure; make; make install
>            III - grub-install /dev/sda7
> 
> Now, my questions are:
>    1) Where can I find informations about where is the GRUB installed?
>    -- 2) I've tried but there are errors with make.. --

GRUB needs to be compiled with gcc-3.4 or gcc-3.3, so do
  CC=gcc-3.4 ./configure

> > So, just start with
> > a really small test which keeps things simple:
> > 
> > kernel .../bootstrap -serial
> > modaddr 0x2000000
> > modules .../fiasco -serial_esc
> > modules .../sigma0
> > modules .../roottask
> > modules .../hello
> > 
> 
> Ehm.. :-(( there isn't the hello module.. then I've downloaded the hello
> package only to compile/build it and retreive the hello module.. by the way,
> the output (hello or not hello), is this:
> 
> 
> .
> .
> .
> L4Bootstrapper
> (null):/root/tudos/L4/pkg/bootstrap/server/src/startup.cc:842:void
> startup(l4util_mb_info_t*, l4_umword_t, void *):Assertion 'mbi -> flags &
> 0x00000008' failed.

This tells us that the Bootloader (GRUB) hasn't loaded any modules.
Bootstrap thus aborts as doing anything without modules makes no sense.

Please try with kernel .../bootstrap -modaddr 0x2000000
and drop the separate modaddr line. Does something change?

> It reboots without any pression of key (maybe the -serial option?) and ok,
> no problem, but I don't comprehend what's up.. a doubt: the addresses are
> right? Because I've seen that the modaddr that we use in this example is of
> 7 digits..

The 0x2000000 that I use in the example is 32MB which should be a fine
value.




Adam
-- 
Adam                 adam at os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/