From: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Date: Wed, 26 Feb 2025 11:44:41 +0000 (+0100)
Subject: elf, uapi: Add definition for STN_UNDEF
X-Git-Tag: v6.15-rc1~202^2~35
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c4131140961b93883e69a01b09f8ed4bcebefaf1;p=thirdparty%2Fkernel%2Flinux.git

elf, uapi: Add definition for STN_UNDEF

The definition is used by tools/testing/selftests/vDSO/parse_vdso.c.

To be able to build the vDSO selftests without a libc dependency,
add the definition to the kernels own UAPI headers.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <kees@kernel.org>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.symtab.html
Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-2-28e14e031ed8@linutronix.de
---

diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index b44069d29cecc..448695c736404 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -125,6 +125,8 @@ typedef __s64	Elf64_Sxword;
 #define STB_GLOBAL 1
 #define STB_WEAK   2
 
+#define STN_UNDEF 0
+
 #define STT_NOTYPE  0
 #define STT_OBJECT  1
 #define STT_FUNC    2