sparc/vdso: Always reject undefined references during linking

Instead of using a custom script to detect and fail on undefined
references, use --no-undefined for all VDSO linker invocations.

Drop the now unused checkundef.sh script.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Andreas Larsson <andreas@gaisler.com>
Link: https://lore.kernel.org/r/20250306-vdso-checkundef-v2-2-a26cc315fd73@linutronix.de

diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index 50ec2978cda5397841daad6ffdc9682811b9b38e..fdc4a8f5a49c5b27fbaee861b24e8b31cfe64477 100644 (file)
--- a/arch/sparc/vdso/Makefile
+++ b/arch/sparc/vdso/Makefile
@@ -22,7 +22,7 @@ targets += $(foreach x, 32 64, vdso-image-$(x).c vdso$(x).so vdso$(x).so.dbg)
 
 CPPFLAGS_vdso.lds += -P -C
 
-VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
+VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 \
                        -z max-page-size=8192
 
 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
@@ -101,7 +101,6 @@ $(obj)/vdso32.so.dbg: FORCE \
 quiet_cmd_vdso = VDSO    $@
       cmd_vdso = $(LD) -nostdlib -o $@ \
                       $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
-                      -T $(filter %.lds,$^) $(filter %.o,$^) && \
-               sh $(src)/checkundef.sh '$(OBJDUMP)' '$@'
+                      -T $(filter %.lds,$^) $(filter %.o,$^)
 
-VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic
+VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic --no-undefined

diff --git a/arch/sparc/vdso/checkundef.sh b/arch/sparc/vdso/checkundef.sh
deleted file mode 100644 (file)
index 2d85876..0000000
--- a/arch/sparc/vdso/checkundef.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/sh
-objdump="$1"
-file="$2"
-$objdump -t "$file" | grep '*UUND*' | grep -v '#scratch' > /dev/null 2>&1
-if [ $? -eq 1 ]; then
-    exit 0
-else
-    echo "$file: undefined symbols found" >&2
-    exit 1
-fi