Re: Strange symbols_lookup() behaviour in test-symbols on arm64 CI

[Mykola Kvach <xakep.amatop@xxxxxxxxx>]

On Thu, Dec 11, 2025 at 5:59 PM Jan Beulich <jbeulich@xxxxxxxx> wrote:
>
> On 11.12.2025 16:57, Mykola Kvach wrote:
> > On Thu, Dec 11, 2025 at 5:31 PM Jan Beulich <jbeulich@xxxxxxxx> wrote:
> >>
> >> On 11.12.2025 13:06, Mykola Kvach wrote:
> >>> On Thu, Dec 11, 2025 at 1:44 PM Mykola Kvach <xakep.amatop@xxxxxxxxx> 
> >>> wrote:
> >>>> I tested the issue with the provided patch, and it is still reproducible.
> >>>
> >>> I also triggered a pipeline with the patch you provided on top of my
> >>> changes [1],
> >>> and it failed there as well. In fact, it exposed additional problems
> >>> in other jobs.
> >>>
> >>> [1] 
> >>> https://gitlab.com/xen-project/people/mykola_kvach/xen/-/pipelines/2209153728
> >>
> >> These are the failures we're trying to hunt down.
> >>
> >> Looking at one of the Arm build logs, I can't see any indication that you 
> >> actually
> >> extended the patch to Arm's linking rule. Hence my conclusion in the other 
> >> reply
> >> may be wrong - we simply still don't know what the situation is there.
> >
> > You're right, I missed the necessary changes. Would this diff be sufficient?
>
> Yes, this looks to be what is needed.

Unfortunately, with this diff applied the issue is still reproducible
on my side.
Please see the attached logs for details.


Mykola

>
> Jan
>
> > --- a/xen/arch/arm/Makefile
> > +++ b/xen/arch/arm/Makefile
> > @@ -100,6 +100,7 @@ $(TARGET)-syms: $(objtree)/prelink.o $(obj)/xen.lds
> >                 | $(objtree)/tools/symbols $(all_symbols) --sysv --sort \
> >                 > $(dot-target).2.S
> >         $(MAKE) $(build)=$(@D) $(dot-target).2.o
> > +       $(call compare-symbol-tables,$(dot-target).1.o,$(dot-target).2.o)
> >         $(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds $< $(build_id_linker) \
> >             $(dot-target).2.o -o $@
> >         $(NM) -pa --format=sysv $@ \
> >
> >
> >>
> >> Jan
> >
> > Best regards,
> > Mykola
>

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Attachment: 0001-arm-makefile-modifications.patch
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