linux-kernel - Re: [PATCH v2 04/16] elf, uapi: Add definitions for VER_FLG_BASE and VER_FLG

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Message-ID: <8e793c2a-f4f8-41a2-beb9-5e4049f7d79b@arm.com>
Date: Fri, 28 Feb 2025 12:24:13 +0000
From: Vincenzo Frascino <vincenzo.frascino@....com>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
 Kees Cook <kees@...nel.org>, Eric Biederman <ebiederm@...ssion.com>,
 Shuah Khan <shuah@...nel.org>, Nathan Chancellor <nathan@...nel.org>,
 Nick Desaulniers <ndesaulniers@...gle.com>, Bill Wendling
 <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>,
 Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
 Willy Tarreau <w@....eu>, Thomas Weißschuh
 <linux@...ssschuh.net>
Cc: "Jason A. Donenfeld" <Jason@...c4.com>,
 Christophe Leroy <christophe.leroy@...roup.eu>, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
 llvm@...ts.linux.dev
Subject: Re: [PATCH v2 04/16] elf, uapi: Add definitions for VER_FLG_BASE and
 VER_FLG_WEAK

On 26/02/2025 11:44, Thomas Weißschuh wrote:
> The definitions are used by tools/testing/selftests/vDSO/parse_vdso.c.
> To be able to build the vDSO selftests without a libc dependency,
> add the definitions to the kernels own UAPI headers.
> 
> Link: https://docs.oracle.com/cd/E19683-01/816-1386/chapter6-80869/index.html
> Reviewed-by: Kees Cook <kees@...nel.org>
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
> ---
>  include/uapi/linux/elf.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
> index c5383cc7bb13c931fea083de5243c4006f795006..d040f12ff1c0ae3dde5c371c81d6089118fbe8ed 100644
> --- a/include/uapi/linux/elf.h
> +++ b/include/uapi/linux/elf.h
> @@ -136,6 +136,9 @@ typedef __s64	Elf64_Sxword;
>  #define STT_COMMON  5
>  #define STT_TLS     6
>  
> +#define VER_FLG_BASE 0x1
> +#define VER_FLG_WEAK 0x2
> +
>  #define ELF_ST_BIND(x)		((x) >> 4)
>  #define ELF_ST_TYPE(x)		((x) & 0xf)
>  #define ELF32_ST_BIND(x)	ELF_ST_BIND(x)
> 

Reviewed-by: Vincenzo Frascino <vincenzo.frascino@....com>

-- 
Regards,
Vincenzo