linux-kernel - Re: [PATCH v2 13/16] scripts/kallsyms: move ignored symbol types to is_ignored

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Date:   Tue, 21 Jul 2020 14:00:33 +1000 (AEST)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Masahiro Yamada <masahiroy@...nel.org>
cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2 13/16] scripts/kallsyms: move ignored symbol types to
 is_ignored_symbol()

On Mon, 20 Jul 2020, Masahiro Yamada wrote:

> 
> I got a similar report before.
> 
> I'd like to know whether or not
> this is the same issue as fixed by
> 7883a14339299773b2ce08dcfd97c63c199a9289
> 

The problem can be observed with 3d77e6a8804ab ("Linux 5.7").
So it appears that 7883a14339299 ("scripts/kallsyms: fix wrong 
kallsyms_relative_base") is not sufficient to fix it.

> 
> Does your problem happen on the latest kernel?

Unfortunately this cross compiler (gcc 4.6.4) is too old to build 
v5.8-rc1 or later. I will have to upgrade.

> Which version of binutils are you using?
> 

This toolchain uses binutils 2.22.

In case it helps,

$ powerpc-linux-gnu-nm -n vmlinux |head                  
         w mach_chrp
00000005 a LG_CACHELINE_BYTES
00000005 a LG_CACHELINE_BYTES
00000005 a LG_CACHELINE_BYTES
0000000c a Hash_bits
0000001f a CACHELINE_MASK
0000001f a CACHELINE_MASK
0000001f a CACHELINE_MASK
00000020 a CACHELINE_BYTES
00000020 a CACHELINE_BYTES
00000020 a CACHELINE_BYTES
00000020 a reg
0003ffc0 a Hash_msk
c0000000 T _start
c0000000 A _stext
c0000000 A _text
c000000c T __start
c0000054 t __after_mmu_off
c0000090 t turn_on_mmu
c00000c4 T __secondary_hold
c00000dc T __secondary_hold_spinloop
c00000e0 T __secondary_hold_acknowledge
c0000100 t Reset