On 09/08/2023 11.17, Nico Boehr wrote:
With somewhat recent GCC versions, we get this warning on s390x:
/usr/bin/ld: warning: s390x/cpu.o: missing .note.GNU-stack section implies executable stack
/usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
We don't really care whether stack is executable or not since we set it
up ourselves and we're running DAT off mostly anyways.
Silence the warning by explicitly marking the stack as not executable.
Signed-off-by: Nico Boehr <nrb@xxxxxxxxxxxxx>
---
s390x/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/s390x/Makefile b/s390x/Makefile
index 706be7920406..afa47ccbeb93 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -79,7 +79,7 @@ CFLAGS += -O2
CFLAGS += -march=zEC12
CFLAGS += -mbackchain
CFLAGS += -fno-delete-null-pointer-checks
-LDFLAGS += -nostdlib -Wl,--build-id=none
+LDFLAGS += -nostdlib -Wl,--build-id=none -z noexecstack
I already did a similar patch some weeks ago:
https://lore.kernel.org/kvm/20230623125416.481755-1-thuth@xxxxxxxxxx/
... we need it for x86, too, so I guess I should go ahead and commit it -
and ask Sean to respin his conflicting series.
Thomas
