Problem with rtems5 on mvme2100 - hard-float/soft-float confusion

[Joel Sherrill]

On Mon, Apr 1, 2019 at 10:20 AM Rahn, Joachim <
Joachim.Rahn at helmholtz-berlin.de> wrote:

> Hi Sebastian,
>
> unfortunately it's not only a copy of the ELF file which BTW was
> also my first guess.
>
> I did all the commands from mvme2100 bsp-post-link (as you proposed) by
> hand and the result is some kind of a mixture of an ELF and
> a BINARY so at least it's neither a correct ELF nor a correct BINARY.
>
> If I do the commands from bsp-post-link without option
> "--no-warn-mismatch" I get the error:
> powerpc-rtems5-ld: o-optimize/hello_world.exe uses hard float,
> /rtems/5/powerpc-rtems5/mvme2100/lib/bootloader.o uses
> soft float
>
> At the moment I have no idea what's going on there...
>

One thing I do to see if there are unintentional build change side-effects
is
to compare the commands used in a working version with the broken version.

Is the boot code compiled and linked in the same way it was before?

The boot mismatch shouldn't cause any issues since the bootloader is
self-contained
and (if I remember right) just unzips the exe and jumps to it.

--joel

>
> Cheers, Joachim
>
> On 01.04.2019 14:34, Sebastian Huber wrote:
> > On 01/04/2019 14:15, Joachim Rahn wrote:
> >> trying to be a bit more detailed...
> >>
> >> On 01.04.19 09:45, Joachim Rahn wrote:
> >> [...snip...]
> >>> Looking into the the produced binary hello_world.ralf one can see,
> >>> that there is still the ELF magic at the
> >>> beginning of the binary file so it seems to me something goes wrong
> >>> during link/load.
> >>>
> >> [...snip...]
> >>
> >> building the examples for mvme2100 with rtems5 works without any error
> >> message
> >> but when I look into a produced binary (i.e. hello_world.ralf) it
> >> looks like
> >
> > This is probably just a copy of the ELF file. You probably have to
> > perform the steps in bsps/powerpc/motorola_powerpc/config/mvme2100.cfg
> > by hand:
> >
> > define bsp-post-link
> >     $(default-bsp-post-link)
> >      $(OBJCOPY) -O binary -R .comment -S $(basename $@)$(EXEEXT) rtems
> >      gzip -vf9 rtems
> >      $(LD) -o $(basename $@)$(DOWNEXT) \
> >         $(PROJECT_RELEASE)/lib/bootloader.o \
> >         --just-symbols=$(basename $@)$(EXEEXT) \
> >         --no-warn-mismatch \
> >          -b binary rtems.gz -T $(PROJECT_RELEASE)/lib/ppcboot.lds \
> >          -Map $(basename $@).map && chmod 755 $@
> >      rm -f rtems.gz
> > endef
> >
>
> ________________________________
>
> Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
>
> Mitglied der Hermann von Helmholtz-Gemeinschaft Deutscher
> Forschungszentren e.V.
>
> Aufsichtsrat: Vorsitzender Dr. Karl Eugen Huthmacher, stv. Vorsitzende Dr.
> Jutta Koch-Unterseher
> Geschäftsführung: Prof. Dr. Bernd Rech (kommissarisch), Thomas Frederking
>
> Sitz Berlin, AG Charlottenburg, 89 HRB 5583
>
> Postadresse:
> Hahn-Meitner-Platz 1
> D-14109 Berlin
> _______________________________________________
> users mailing list
> users at rtems.org
> http://lists.rtems.org/mailman/listinfo/users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rtems.org/pipermail/users/attachments/20190401/335b74bc/attachment-0002.html>