linux-kernel - Re: ld.lld: error: vmlinux.a(kernel/kallsyms.o):(function kallsyms_lookup_name: .text+0x90): relocation R_RISCV_PCREL_HI20 out of range: -524416 is not in [-524288, 524287]; references kallsyms_seqs_of

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Date: Tue, 12 Mar 2024 13:53:36 +0800
From: Yujie Liu <yujie.liu@...el.com>
To: "Leizhen (ThunderTown)" <thunder.leizhen@...weicloud.com>
CC: kernel test robot <lkp@...el.com>, Zhen Lei <thunder.leizhen@...wei.com>,
	<oe-kbuild-all@...ts.linux.dev>, <linux-kernel@...r.kernel.org>, "Luis
 Chamberlain" <mcgrof@...nel.org>
Subject: Re: ld.lld: error: vmlinux.a(kernel/kallsyms.o):(function
 kallsyms_lookup_name: .text+0x90): relocation R_RISCV_PCREL_HI20 out of
 range: -524416 is not in [-524288, 524287]; references
 kallsyms_seqs_of_names

Hi Zhen,

On Tue, Feb 20, 2024 at 08:27:15PM +0800, Leizhen (ThunderTown) wrote:
> > On 2024/2/6 13:19, kernel test robot wrote:
> >> Hi Zhen,
> >>
> >> FYI, the error/warning still remains.
> > 
> > I'm trying to reproduce it. But I'm having a little trouble getting
> > the environment ready.
> 
> Sorry, I tried but it was not reproduced. I made the following two changes
> to the steps in the 'reproduce' link:
> 1. Put linux and lkp-tests in two directories of the same level. Because:
>    $ git fetch --no-tags linus master
>    error: RPC failed; HTTP 403 curl 22 The requested URL returned error: 403
>    fatal: error reading section header 'acknowledgments'
> 2. Compiler was specified by following the prompts.
>    COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
>    COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash
>    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Sorry for our late reply. We rechecked this case and noticed that this
issue can be reproduced by clang-15, but can't be reproduced by newer
version of clang. Not sure if this is a flaw in old version of LLVM
toolchain, just for your information.

$ COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-15 ~/lkp-tests/kbuild/make.cross W=1 ARCH=riscv
..
  LD      .tmp_vmlinux.kallsyms1
ld.lld: error: vmlinux.a(kernel/kallsyms.o):(function kallsyms_lookup_name: .text+0x70): relocation R_RISCV_PCREL_HI20 out of range: -524416 is not in [-524288, 524287]; references kallsyms_num_syms
>>> referenced by kallsyms.c
>>> defined in vmlinux.a(kernel/kallsyms.o)

ld.lld: error: vmlinux.a(kernel/kallsyms.o):(function kallsyms_lookup_name: .text+0x90): relocation R_RISCV_PCREL_HI20 out of range: -524416 is not in [-524288, 524287]; references kallsyms_seqs_of_names
>>> referenced by kallsyms.c
>>> defined in vmlinux.a(kernel/kallsyms.o)
..

Thanks,
Yujie

> 
> Image is finally generated, so there should be no problem with the above steps being adjusted:
> $ ls build_dir/arch/riscv/boot/
> dts  Image  loader  loader.bin  loader.lds  loader.o
> 
> By the way, all the symbols to be reported "relocation R_RISCV_PCREL_HI20 out of range" is
> generated by the tool kallsyms (scripts/kallsyms.c). So, it seems that the tool kallsyms
> have not been executed. And this error is not caused by my patches.
> 
> > 
> >>
> >> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> >> head:   54be6c6c5ae8e0d93a6c4641cb7528eb0b6ba478
> >> commit: 60443c88f3a89fd303a9e8c0e84895910675c316 kallsyms: Improve the performance of kallsyms_lookup_name()
> >> date:   1 year, 3 months ago
> >> config: riscv-randconfig-r064-20240120 (https://download.01.org/0day-ci/archive/20240206/202402061302.HkByW9x0-lkp@intel.com/config)
> >> compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
> >> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240206/202402061302.HkByW9x0-lkp@intel.com/reproduce)
> >>
> >> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> >> the same patch/commit), kindly add following tags
> >> | Reported-by: kernel test robot <lkp@...el.com>
> >> | Closes: https://lore.kernel.org/oe-kbuild-all/202402061302.HkByW9x0-lkp@intel.com/
> >>
> >> All errors (new ones prefixed by >>):
> >>
> >>>> ld.lld: error: vmlinux.a(kernel/kallsyms.o):(function kallsyms_lookup_name: .text+0x90): relocation R_RISCV_PCREL_HI20 out of range: -524416 is not in [-524288, 524287]; references kallsyms_seqs_of_names
> >>    >>> referenced by kallsyms.c
> >>    >>> defined in vmlinux.a(kernel/kallsyms.o)
> >>
> >