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sparc/vdso: Always reject undefined references during linking

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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
This commit is contained in:
Thomas Weißschuh 2025-03-06 15:07:21 +01:00 committed by Ingo Molnar
parent c080f2b8a2
commit 652262975d
2 changed files with 3 additions and 14 deletions
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7
arch/sparc/vdso/Makefile
View File

@ -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

10
arch/sparc/vdso/checkundef.sh
View File

@ -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