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

[Jan Beulich <jbeulich@xxxxxxxx>]

On 15.01.2026 16:33, Jan Beulich wrote:
> On 14.01.2026 07:00, Mykola Kvach wrote:
>> On Mon, Dec 15, 2025 at 1:27 PM Jan Beulich <jbeulich@xxxxxxxx> wrote:
>>> On 15.12.2025 12:00, Mykola Kvach wrote:
>>>> On Thu, Dec 11, 2025 at 6:40 PM Jan Beulich <jbeulich@xxxxxxxx> wrote:
>>>>> On 11.12.2025 17:30, Mykola Kvach wrote:
>>>>>> I have now attached the corresponding build log.
>>>>>
>>>>> Okay, so indeed not a table size change issue here. Then I fear some 
>>>>> instrumenting
>>>>> will be needed to at least know what exactly is going wrong. 
>>>>> Alternatively you could
>>>>> arrange for the intermediate binaries to not be deleted, and make them 
>>>>> available
>>>>> somehow / somewhere for me to see whether by inspection I can gain some 
>>>>> clue.
>>>>
>>>> I prepared a small patch to keep the intermediate artifacts instead of
>>>> deleting them.
>>>>
>>>> It removes two cleanup commands:
>>>>     xen/arch/arm/Makefile: drops rm -f $(@D)/.$(@F).[0-9]* (keeps
>>>> .xen-syms.* intermediates)
>>>
>>> This alone should be sufficient.
>>
>> Understood. I have rerun the build with the cleanup line removed
>> so the intermediate .xen-syms.* files are kept.
>>
>> The build artifacts are available here:
>> https://gitlab.com/xen-project/people/mykola_kvach/xen/-/jobs/12707528457/artifacts/browse/xen/
> 
> Apart from the intermediate files there's a file named xen there, but xen-syms
> is missing. I'll see what I can do without that.

Actually, can you give the patch below a try? That would explain the 24-byte
difference (albeit I'm struggling with some other aspects of a proper
explanation).

Jan

--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -87,13 +87,13 @@ endif
 $(TARGET)-syms: $(objtree)/prelink.o $(obj)/xen.lds
        $(objtree)/tools/symbols $(all_symbols) --empty > $(dot-target).0.S
        $(MAKE) $(build)=$(@D) $(dot-target).0.o
-       $(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds $< \
+       $(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds $< $(build_id_linker) \
              $(dot-target).0.o -o $(dot-target).0
        $(NM) -pa --format=sysv $(dot-target).0 \
                | $(objtree)/tools/symbols $(all_symbols) --sysv --sort \
                > $(dot-target).1.S
        $(MAKE) $(build)=$(@D) $(dot-target).1.o
-       $(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds $< \
+       $(LD) $(XEN_LDFLAGS) -T $(obj)/xen.lds $< $(build_id_linker) \
            $(dot-target).1.o -o $(dot-target).1
        $(NM) -pa --format=sysv $(dot-target).1 \
                | $(objtree)/tools/symbols $(all_symbols) --sysv --sort \