[PATCH v4 25/35] sparc64: vdso: Link with -z noexecstack

["Thomas Weißschuh" <thomas.weissschuh@linutronix.de>]

The vDSO stack does not need to be executable. Prevent the linker from
creating executable. For more background see commit ffcf9c5700e4 ("x86:
link vdso and boot with -z noexecstack --no-warn-rwx-segments").

Also prevent the following warning from the linker:
sparc64-linux-ld: warning: arch/sparc/vdso/vdso-note.o: missing .note.GNU-stack section implies executable stack
sparc64-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker

Suggested-by: Arnd Bergmann <arnd@kernel.org>
Link: https://lore.kernel.org/lkml/20250707144726.4008707-1-arnd@kernel.org/
Fixes: 9a08862a5d2e ("vDSO for sparc")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Tested-by: Andreas Larsson <andreas@gaisler.com>
Reviewed-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: Andreas Larsson <andreas@gaisler.com>
---
 arch/sparc/vdso/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index 1a4e585c91d7d03d8444cc2e4914fd10cd078fb8..2e911ccc9db71b2888ffc432d75ac8815ecce0f7 100644
--- a/arch/sparc/vdso/Makefile
+++ b/arch/sparc/vdso/Makefile
@@ -107,4 +107,4 @@ quiet_cmd_vdso = VDSO    $@
 		       $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
 		       -T $(filter %.lds,$^) $(filter %.o,$^)
 
-VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic --no-undefined
+VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic --no-undefined -z noexecstack

-- 
2.51.0