linux-kernel - Re: [kbuild-all] Re: powerpc-linux-objdump: Warning: Unrecognized form: 0x23

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Message-ID: <9d77cb93-2eff-d87d-6554-1636d5e7d5ec@csgroup.eu>
Date:   Thu, 1 Sep 2022 05:45:31 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     "Chen, Rong A" <rong.a.chen@...el.com>,
        Nathan Chancellor <nathan@...nel.org>
CC:     kernel test robot <lkp@...el.com>,
        Kees Cook <keescook@...omium.org>,
        "llvm@...ts.linux.dev" <llvm@...ts.linux.dev>,
        "kbuild-all@...ts.01.org" <kbuild-all@...ts.01.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [kbuild-all] Re: powerpc-linux-objdump: Warning: Unrecognized
 form: 0x23



Le 01/09/2022 à 06:59, Chen, Rong A a écrit :
> 
> 
> On 9/1/2022 10:03 AM, Nathan Chancellor wrote:
>> Hi Rong,
>>
>> On Thu, Sep 01, 2022 at 09:15:58AM +0800, Chen, Rong A wrote:
>>>
>>>
>>> On 8/31/2022 11:40 PM, Nathan Chancellor wrote:
>>>> On Wed, Aug 31, 2022 at 02:52:36PM +0800, kernel test robot wrote:
>>>>> tree:   
>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
>>>>> master
>>>>> head:   dcf8e5633e2e69ad60b730ab5905608b756a032f
>>>>> commit: f9b3cd24578401e7a392974b3353277286e49cee Kconfig.debug: 
>>>>> make DEBUG_INFO selectable from a choice
>>>>> date:   5 months ago
>>>>> config: powerpc-buildonly-randconfig-r003-20220830 
>>>>> (https://download.01.org/0day-ci/archive/20220831/202208311414.4OPuYS9K-lkp@intel.com/config)
>>>>> compiler: clang version 16.0.0 
>>>>> (https://github.com/llvm/llvm-project 
>>>>> c7df82e4693c19e3fd2e25c83eb04d9deb7b7b59)
>>>>> reproduce (this is a W=1 build):
>>>>>           wget 
>>>>> https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>>>>           chmod +x ~/bin/make.cross
>>>>>           # install powerpc cross compiling tool for clang build
>>>>>           # apt-get install binutils-powerpc-linux-gnu
>>>>>           # 
>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9b3cd24578401e7a392974b3353277286e49cee
>>>>>           git remote add linus 
>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>>>>           git fetch --no-tags linus master
>>>>>           git checkout f9b3cd24578401e7a392974b3353277286e49cee
>>>>>           # save the config file
>>>>>           mkdir build_dir && cp config build_dir/.config
>>>>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 
>>>>> make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
>>>>>
>>>>> If you fix the issue, kindly add following tag where applicable
>>>>> Reported-by: kernel test robot <lkp@...el.com>
>>>>>
>>>>> All warnings (new ones prefixed by >>):
>>>>>
>>>>>>> powerpc-linux-objdump: Warning: Unrecognized form: 0x23
>>>>
>>>> Given this is clang 16.0.0 with
>>>> CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y, which uses DWARF5 by
>>>> default instead of DWARF4, it looks like older binutils not
>>>> understanding DWARF5. What version of binutils is being used by the 
>>>> bot?
>>>
>>> Hi Nathan,
>>>
>>> We're using binutils v2.38.90.20220713-2
>>>
>>> ||/ Name           Version            Architecture Description
>>> +++-==============-==================-============-==========================================
>>> ii  binutils       2.38.90.20220713-2 amd64        GNU assembler, 
>>> linker and binary utilities
>>
>> Thanks for chiming in! This looks like the output of 'dpkg -l', right? I
> 
> Hi Nathan,
> 
> oh, yes, I misunderstood, it's not related to this package.
> 
>> noticed on second glance that the tuple for the objdump warning above is
>> 'powerpc-linux-', which leads me to believe that a kernel.org toolchain
>> (or a self compiled one) is being used. I would expect the tuple to be
>> 'powerpc-linux-gnu-' if Debian's package was being used. Is that
>> possible?
> 
> you are right, we used a self-compiled toolchain, we'll try the binutils
> from debian package.

Can you first tell us the version you are using ?

	powerpc-linux-objdump -v

That will tell you the version.

Thanks
Christophe