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

[PATCH 03/16] elf, uapi: Add definition for DT_GNU_HASH

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 define to the kernels own UAPI headers.

Link: https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/libc-ddefs.html
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
 include/uapi/linux/elf.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index 448695c7364042b10682acc8223eb6053ad039dd..c5383cc7bb13c931fea083de5243c4006f795006 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -107,6 +107,7 @@ typedef __s64	Elf64_Sxword;
 #define DT_VALRNGLO	0x6ffffd00
 #define DT_VALRNGHI	0x6ffffdff
 #define DT_ADDRRNGLO	0x6ffffe00
+#define DT_GNU_HASH	0x6ffffef5
 #define DT_ADDRRNGHI	0x6ffffeff
 #define DT_VERSYM	0x6ffffff0
 #define DT_RELACOUNT	0x6ffffff9

-- 
2.48.1

Re: [PATCH 03/16] elf, uapi: Add definition for DT_GNU_HASH

Posted by Kees Cook 1 year ago

On Mon, Feb 03, 2025 at 10:05:04AM +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 define to the kernels own UAPI headers.
> 
> Link: https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/libc-ddefs.html
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>

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

-- 
Kees Cook