[v1] selftests: vDSO: parse_vdso: Make compatible with nolibc

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

Posted by Thomas Weißschuh 1 year ago

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
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

-- 
2.48.1

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

Posted by Kees Cook 1 year ago

On Mon, Feb 03, 2025 at 10:05:03AM +0100, Thomas Weißschuh wrote:
> 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
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>

Reviewed-by: Kees Cook <kees@kernel.org>

-- 
Kees Cook