Christophe Leroy <christophe.le...@csgroup.eu> writes:
> Le 24/09/2020 à 15:17, Christophe Leroy a écrit :
>> Le 17/09/2020 à 14:33, Michael Ellerman a écrit :
>>> Christophe Leroy <christophe.le...@csgroup.eu> writes:
>>>>
>>>> What is the status with the generic C vdso merge ?
>>>> In some mail, you mentionned having difficulties getting it working on
>>>> ppc64, any progress ? What's the problem ? Can I help ?
>>>
>>> Yeah sorry I was hoping to get time to work on it but haven't been able
>>> to.
>>>
>>> It's causing crashes on ppc64 ie. big endian.
...
>>
>> Can you tell what defconfig you are using ? I have been able to setup a full
>> glibc PPC64 cross
>> compilation chain and been able to test it under QEMU with success, using
>> Nathan's vdsotest tool.
>
> What config are you using ?
ppc64_defconfig + guest.config
Or pseries_defconfig.
I'm using Ubuntu GCC 9.3.0 mostly, but it happens with other toolchains too.
At a minimum we're seeing relocations in the output, which is a problem:
$ readelf -r build\~/arch/powerpc/kernel/vdso64/vdso64.so
Relocation section '.rela.dyn' at offset 0x12a8 contains 8 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000001368 000000000016 R_PPC64_RELATIVE 7c0
000000001370 000000000016 R_PPC64_RELATIVE 9300
000000001380 000000000016 R_PPC64_RELATIVE 970
000000001388 000000000016 R_PPC64_RELATIVE 9300
000000001398 000000000016 R_PPC64_RELATIVE a90
0000000013a0 000000000016 R_PPC64_RELATIVE 9300
0000000013b0 000000000016 R_PPC64_RELATIVE b20
0000000013b8 000000000016 R_PPC64_RELATIVE 9300
cheers
