linux-kernel - Re: [PATCH 3/5] LoongArch: Support relocation against _GLOBAL_OFFSET_TABLE

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Message-ID: <73f83b51eaf40ff1f173059e1f187182db47a1c6.camel@xry111.site>
Date:   Thu, 28 Jul 2022 18:57:10 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     Jinyang He <hejinyang@...ngson.cn>, loongarch@...ts.linux.dev
Cc:     linux-kernel@...r.kernel.org, WANG Xuerui <kernel@...0n.name>,
        Huacai Chen <chenhuacai@...nel.org>
Subject: Re: [PATCH 3/5] LoongArch: Support relocation against
 _GLOBAL_OFFSET_TABLE_

On Thu, 2022-07-28 at 17:14 +0800, Jinyang He wrote:
> Not sure but maybe re-align is needed here.
> Since '{BYTE(0)}' actually use 1byte. _GLOABL_OFFSET_TABLE_ may have
> difference with really GOT table entry. Have no machine and without 
> test... :-(

BYTE(0) is only for preventing the linker from removing the section. 
All we want from the linker is a slot for .got in the section table, and
the actual property (including size) will be filled at runtime by
module_frob_arch_sections.  The first GOT entry won't be "appended"
after one byte, it is wrote into the start of .got (at runtime).

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