elf, uapi: Add definition for DT_GNU_HASH

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.

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.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/libc-ddefs.html
Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-3-28e14e031ed8@linutronix.de

diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index 448695c7364042b10682acc8223eb6053ad039dd..c5383cc7bb13c931fea083de5243c4006f795006 100644 (file)
--- 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