linux-kernel - [tip: timers/vdso] sparc/vdso: Always reject undefined references during linking

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Message-ID: <174168417345.14745.6224882189458073686.tip-bot2@tip-bot2>
Date: Tue, 11 Mar 2025 09:09:33 -0000
From:
 tip-bot2 for Thomas Weißschuh <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: thomas.weissschuh@...utronix.de, Ingo Molnar <mingo@...nel.org>,
 "David S. Miller" <davem@...emloft.net>,
 Andreas Larsson <andreas@...sler.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: timers/vdso] sparc/vdso: Always reject undefined references
 during linking

The following commit has been merged into the timers/vdso branch of tip:

Commit-ID:     652262975db421767ada3f05b926854bbb357759
Gitweb:        https://git.kernel.org/tip/652262975db421767ada3f05b926854bbb357759
Author:        Thomas Weißschuh <thomas.weissschuh@...utronix.de>
AuthorDate:    Thu, 06 Mar 2025 15:07:21 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 11 Mar 2025 09:54:48 +01:00

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@...utronix.de>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: David S. Miller <davem@...emloft.net>
Cc: Andreas Larsson <andreas@...sler.com>
Link: https://lore.kernel.org/r/20250306-vdso-checkundef-v2-2-a26cc315fd73@linutronix.de
---
 arch/sparc/vdso/Makefile      |  7 +++----
 arch/sparc/vdso/checkundef.sh | 10 ----------
 2 files changed, 3 insertions(+), 14 deletions(-)
 delete mode 100644 arch/sparc/vdso/checkundef.sh

diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index 50ec297..fdc4a8f 100644
--- 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
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