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

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Message-Id: <20250203-parse_vdso-nolibc-v1-4-9cb6268d77be@linutronix.de>
Date: Mon, 03 Feb 2025 10:05:05 +0100
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: 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>, 
 Vincenzo Frascino <vincenzo.frascino@....com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, llvm@...ts.linux.dev, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH 04/16] elf, uapi: Add definitions for VER_FLG_BASE and
 VER_FLG_WEAK

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
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)

-- 
2.48.1