[v2,02/16] elf, uapi: Add definition for STN_UNDEF

Message ID	20250226-parse_vdso-nolibc-v2-2-28e14e031ed8@linutronix.de (mailing list archive)
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Headers	show Return-Path: <owner-linux-mm@kvack.org> From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= <thomas.weissschuh@linutronix.de> Date: Wed, 26 Feb 2025 12:44:41 +0100 Subject: [PATCH v2 02/16] elf, uapi: Add definition for STN_UNDEF MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20250226-parse_vdso-nolibc-v2-2-28e14e031ed8@linutronix.de> References: <20250226-parse_vdso-nolibc-v2-0-28e14e031ed8@linutronix.de> In-Reply-To: <20250226-parse_vdso-nolibc-v2-0-28e14e031ed8@linutronix.de> To: Kees Cook <kees@kernel.org>, Eric Biederman <ebiederm@xmission.com>, Shuah Khan <shuah@kernel.org>, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>, Andy Lutomirski <luto@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Willy Tarreau <w@1wt.eu>, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= <linux@weissschuh.net> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>, Christophe Leroy <christophe.leroy@csgroup.eu>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= <thomas.weissschuh@linutronix.de> Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	selftests: vDSO: parse_vdso: Make compatible with nolibc \| expand [v2,00/16] selftests: vDSO: parse_vdso: Make compatible with nolibc [v2,01/16] MAINTAINERS: Add vDSO selftests [v2,02/16] elf, uapi: Add definition for STN_UNDEF [v2,03/16] elf, uapi: Add definition for DT_GNU_HASH [v2,04/16] elf, uapi: Add definitions for VER_FLG_BASE and VER_FLG_WEAK [v2,05/16] elf, uapi: Add type ElfXX_Versym [v2,06/16] elf, uapi: Add types ElfXX_Verdef and ElfXX_Veraux [v2,07/16] tools/include: Add uapi/linux/elf.h [v2,08/16] selftests: Add headers target [v2,09/16] tools/nolibc: add limits.h shim header [v2,10/16] selftests: vDSO: vdso_standalone_test_x86: Use vdso_init_form_sysinfo_ehdr [v2,11/16] selftests: vDSO: parse_vdso: Drop vdso_init_from_auxv() [v2,12/16] selftests: vDSO: parse_vdso: Use UAPI headers instead of libc headers [v2,13/16] selftests: vDSO: parse_vdso: Test __SIZEOF_LONG__ instead of ULONG_MAX [v2,14/16] selftests: vDSO: vdso_test_gettimeofday: Clean up includes [v2,15/16] selftests: vDSO: vdso_test_gettimeofday: Make compatible with nolibc [v2,16/16] selftests: vDSO: vdso_standalone_test_x86: Switch to nolibc

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20250226-parse_vdso-nolibc-v2-2-28e14e031ed8@linutronix.de (mailing list archive)

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From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= <thomas.weissschuh@linutronix.de>
Date: Wed, 26 Feb 2025 12:44:41 +0100
Subject: [PATCH v2 02/16] elf, uapi: Add definition for STN_UNDEF
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Message-Id: <20250226-parse_vdso-nolibc-v2-2-28e14e031ed8@linutronix.de>
References: <20250226-parse_vdso-nolibc-v2-0-28e14e031ed8@linutronix.de>
In-Reply-To: <20250226-parse_vdso-nolibc-v2-0-28e14e031ed8@linutronix.de>
To: Kees Cook <kees@kernel.org>, Eric Biederman <ebiederm@xmission.com>,
  Shuah Khan <shuah@kernel.org>, Nathan Chancellor <nathan@kernel.org>,
  Nick Desaulniers <ndesaulniers@google.com>,
  Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>,
  Andy Lutomirski <luto@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
  Vincenzo Frascino <vincenzo.frascino@arm.com>, Willy Tarreau <w@1wt.eu>,
	=?utf-8?q?Thomas_Wei=C3=9Fschuh?= <linux@weissschuh.net>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>,
  Christophe Leroy <christophe.leroy@csgroup.eu>, linux-mm@kvack.org,
  linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
  llvm@lists.linux.dev,
 =?utf-8?q?Thomas_Wei=C3=9Fschuh?= <thomas.weissschuh@linutronix.de>
Sender: owner-linux-mm@kvack.org
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Series

selftests: vDSO: parse_vdso: Make compatible with nolibc | expand

Commit Message

Thomas Weißschuh Feb. 26, 2025, 11:44 a.m. UTC

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.

Link: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.symtab.html
Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
 include/uapi/linux/elf.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index b44069d29cecc0f9de90ee66bfffd2137f4275a8..448695c7364042b10682acc8223eb6053ad039dd 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

[v2,02/16] elf, uapi: Add definition for STN_UNDEF

Commit Message

Patch