linux-kernel - Re: [PATCH v4 0/4] LoongArch: Support new relocation types

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Message-ID: <a139a8475fe295ac9f17064269cd0312dca6f96e.camel@xry111.site>
Date:   Fri, 29 Jul 2022 18:36:05 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     Youling Tang <tangyouling@...ngson.cn>, loongarch@...ts.linux.dev
Cc:     linux-kernel@...r.kernel.org, WANG Xuerui <kernel@...0n.name>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jinyang He <hejinyang@...ngson.cn>
Subject: Re: [PATCH v4 0/4] LoongArch: Support new relocation types

On Fri, 2022-07-29 at 18:18 +0800, Xi Ruoyao wrote:
> On Fri, 2022-07-29 at 17:49 +0800, Youling Tang wrote:
> > Hi, Ruoyao
> > 
> > Tested this series of patches v3 on a CLFS 5.5 system, using the new
> > cross toolchain,
> > $ dmesg | head
> > [    0.000000] Linux version 5.19.0-rc7new-toolchain+ (loongson@...ux)
> > (loongarch64-unknown-linux-gnu-gcc (GCC) 13.0.0 20220726 (experimental) 
> > [master revision 
> > cf7eac5805e:1e0611b64d8:3fb68f2e666d9de7e0326af9f43b12c9e98f19a6], GNU
> > ld (GNU Binutils) 2.39.50.20220726) #1 SMP PREEMPT Fri Jul 29 05:24:15
> > EDT 2022
> > 
> > Relocation error when manually loading nf_tables.ko module,
> > $ sudo modprobe nf_tables
> > odprobe: ERROR: could not insert 'nf_tables': Exec format error
> > 
> > $ dmesg
> > [   61.506737] kmod: module nf_tables: PCALA offset = 0x90007ffffed8c000 
> > does not fit in 32-bit signed and is unsupported by kernel! dangerous 
> > apply_r_larch_pcala_hi20 (71) relocation
> > 
> > Do you have the same problem over there?
> 
> I can reproduce it with "modprobe x_tables".  Will try to debug...

The relocation against local percpu variable is broken up.  I'll try to
fix it.

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University