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Date:   Fri, 21 Jan 2022 16:08:17 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Alexander Lobakin <alexandr.lobakin@intel.com>
Cc:     linux-hardening@vger.kernel.org, x86@kernel.org,
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Subject: Re: [PATCH v9 05/15] x86: support ASM function sections
Message-ID: <YerMYcin4woehiL9@zn.tnic>
References: <20211223002209.1092165-1-alexandr.lobakin@intel.com>
 <20211223002209.1092165-6-alexandr.lobakin@intel.com>
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On Thu, Dec 23, 2021 at 01:21:59AM +0100, Alexander Lobakin wrote:
> Address places which need special care and enable
> CONFIG_ARCH_SUPPORTS_ASM_FUNCTION_SECTIONS.
> 
> Notably:
>  - propagate --sectname-subst to aflags in x86/boot/Makefile and
>    x86/boot/compressed/Makefile as both override aflags;

s/aflags/KBUILD_AFLAGS/

Let's be more precise pls.

>  - symbols starting with a dot (like ".Lbad_gs") should be handled
>    manually with SYM_*_START_SECT(.Lbad_gs, bad_gs) as "two dots"
>    is a special (and CPP doesn't want to concatenate two dots in
>    general);
>  - some symbols explicitly need to reside in one section (like
>    kexec control code, hibernation page etc.);
>  - macros creating aliases for functions (like __memcpy() for
>    memcpy() etc.) should go after the main declaration (as
>    aliases should be declared in the same section and they
>    don't have SYM_PUSH_SECTION() inside);
>  - things like ".org", ".align" should be manually pushed to
>    the same section the next symbol goes to;
>  - expand indirect_thunk and .fixup wildcards in vmlinux.lds.S

$ git grep -E "\.fixup" arch/x86/*.S
$

I guess I'll continue with your new version since a bunch of stuff
has changed in arch/x86/ in the meantime so that that set would need
refreshing.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette