Rtems for a space project

Tue Jan 13 17:08:15 UTC 2009

Massimo Tipaldi wrote:
> With the qemu-0.9.1-windows, the GRUB does not start.
> On the DOS shell I have:
> qemu: could not open disk image d:optrtems-4.9rtems-boot.img
>   
This looks like the directory path argument is
not specified in a way qemu likes.  Very likely it is
some confusion or / versus \ and maybe needing \\ or
something. 
> The floppy image rtems-boot.img has been downloaded from the RTEMS wiki.
> With the 0.9.0, I do not have any problem and GRUB starts.
>
>
> I send you the hello.exe correctly managed by the 0.9.0 and the one that 
> has the issue "no multiboot header found".
>
>   
OK I duplicated that.

The "not ok"  is indeed ELF BUT it was NOT linked
using the right arguments for an RTEMS executable.
I suspect you did this:

i386-rtems4.9-gcc -o hello.exe hello.c

That doesn't work.  You have to provide the BSP specific
arguments.  The external Makefiles in RTEMS may not be
ideal but they get that right.

I can tell the above because you didn't end up with proper
link addresses, crt0, and have dummies for a number of
routines.  Compare output of i386-rtems-nm -g -n on the
two executables.  It is clearly different.

Compare how you did this versus how the hello sample is
compiled and linked inside the tree.

I am leaving soon for the day so won't be able to
offer anything else today. 

--joel
> Massimo
>
>
> Joel Sherrill ha scritto:
>   
>> Massimo Tipaldi wrote:
>>     
>>> Joel,
>>>
>>> I have downloaded QEMU from http://www.h7.dion.ne.jp/~qemu-win/.
>>>
>>> The file is qemu-0.9.0-windows.zip.
>>>
>>> Window version of QEMU: 0.9.0
>>> GNU GRUB version 1.94
>>>
>>>   
>>>       
>> I found that he has a new site with 0.9.1.  He also
>> states that there was a version of 0.9.0 with a virus
>> attached.  Because of this I am not installing 0.9.0
>> on my PC.
>>
>> Try this page for 0.9.1.
>>
>> http://homepage3.nifty.com/takeda-toshiya/qemu/
>>
>> I used a ticker.exe (not ticker.ralf) and it booted fine with
>> the floppy image I used on linux.
>>
>> ticker.ralf is a netboot image and apparently grub doesn't
>> like it.
>>
>> I am going to be off this afternoon but if you can't get it to
>> run, email me your ticker.exe (compressed) and I will
>> try it locally.
>>
>>
>> --joel
>>     
>>> Massimo
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Joel Sherrill ha scritto:
>>>  
>>>       
>>>> Massimo Tipaldi wrote:
>>>>    
>>>>         
>>>>> OK, I experienced myself that the Rtems makefiles are not correct 
>>>>> ...but I should solve my issue, if it is possible.
>>>>>         
>>>>>           
>>>> I have been unable to duplicate any problem you have reported.
>>>> I don't know what is going wrong with your install.
>>>>    
>>>>         
>>>>> In any case, I'd like to know if:
>>>>> 1) someone has considering compiling an easy RTEMS application on 
>>>>> Windows PC for i386(and not on a Linux PC, where I konw that it works)
>>>>>         
>>>>>           
>>>> It works on Windows but the main developers use Windows
>>>> as little as possible.  The Eclipse plugin work was initially
>>>> done on Windows.
>>>>
>>>>    
>>>>         
>>>>> 2) how this application can be make compliant with Grub (Elf 
>>>>> file/multiboot specification).
>>>>>
>>>>>         
>>>>>           
>>>> You have at least 4 variables.  I suspect your qemu/grub
>>>> setup.  Can you tell me where you got your Windows version
>>>> of Qemu and what version it is.  The one I see is not that latest
>>>> version and that by itself is enough to cause issues.
>>>>
>>>> With that, I will run the executable and grub setup I have
>>>> on Linux on Windows so we can be sure that a known good
>>>> RTEMS executable can even run on the version of qemu
>>>> you have.
>>>>
>>>> I do LOTS of testing on qemu/rtems/grub/linux.  This is
>>>> how the i386-rtems tool test results are generated.  That is
>>>> ~80K tests in batch mode.  There are many Windows users.
>>>>
>>>> So we need to reduce variables.  First order is to split it
>>>> between rtems/tools and qemu.
>>>>    
>>>>         
>>>>> I insist on these points:
>>>>>         1) the Grub set-up is correct and the source of this failure 
>>>>> is somewhere else (the hello.exe in testsuites/samples works)
>>>>> 2) I have followed all the Rtems wiki instructions to install the 
>>>>> toolchains, rtems and so on; the packages have been downloaded 
>>>>> following the links shown on Rtems wiki.
>>>>>
>>>>> Can I hope to solve this issue? Is Rtems today mature for Windows?
>>>>>
>>>>>
>>>>> Massimo
>>>>>
>>>>>
>>>>>
>>>>> rtwas ha scritto:
>>>>>  
>>>>>      
>>>>>           
>>>>>> Hello,
>>>>>>
>>>>>> Ralf Corsepius wrote:
>>>>>>
>>>>>>           
>>>>>>             
>>>>>>>  Makefile.inc is a different class of problem.
>>>>>>>
>>>>>>>  My personal answer to all Makefile.inc related problems: I refuse to
>>>>>>>  answer any Makefile.inc related issues, because I consider RTEMS
>>>>>>>  Makefile-template system to be mal-designed kid-stuff, RTEMS should
>>>>>>>  have stopped dropped a long time ago ;)
>>>>>>>                 
>>>>>>>               
>>>>>> ;)
>>>>>>
>>>>>> I was never comfortable with having the make-system *hidden* from 
>>>>>> me. I made
>>>>>> an attempt to be a *good boy* and use it but couldn't get it to 
>>>>>> work for my particular
>>>>>> build so I ended up reverse engineering it (Makefile templates 
>>>>>> etc.) and writing my
>>>>>> own (Makefile system) from scratch.
>>>>>>
>>>>>> Robert W.
>>>>>>
>>>>>> _______________________________________________
>>>>>> rtems-users mailing list
>>>>>> rtems-users at rtems.com
>>>>>> http://rtems.rtems.org/mailman/listinfo/rtems-users
>>>>>>
>>>>>>             
>>>>>>             
>>>>>         
>>>>>           
>>>>     
>>>>         
>>>   
>>>       
>>     
>
>
>   

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill at OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985