Rtems for a space project

Massimo Tipaldi mtipaldi at cgspace.it
Wed Jan 14 08:44:39 UTC 2009


I think we are on the right track.

The makefile in the Rtems examples 4.9.1 includes a Makefile.inc located 
in the tree (/d/opt/src/rtems/i386/i386-rtems4.9/c/pc386/make).

To compile my hello.exe from the exeamples 4.9.1, I was obliged to 
modify a little bit the Makefile.inc:

CC_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-gcc --pipe 
-I/d/opt/src/rtems/i386/i386-rtems4.9/pc386/lib/include

CXX_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-g++

AS_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-as

AR_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-ar

NM_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-nm

LD_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-ld

SIZE_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-size

OBJCOPY_FOR_TARGET = /d/opt/rtems-4.9/bin/i386-rtems4.9-objcopy



I suppose that we have to modify further the CC_FOR_TARGET definition to 
provide the BSP arguments.

Let me know how to do and I'll try immediately your suggetions.


Massimo





Joel Sherrill ha scritto:
> 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
>>>>>>>
>>>>>>>                         
>>>>>>                   
>>>>>             
>>>>         
>>>     
>>
>>
>>   
> 
> 


-- 

Eng. Massimo Tipaldi
Technical Directorate
SW Principal Engineer


Carlo Gavazzi Space SpA
Via Tiengo, snc - 82100 Benevento BN - Italy
Tel: + 39 0824481733
Fax: +39 0824481730
e-mail: mtipaldi at cgspace.it
www.cgspace.it

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