From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: PowerPC <linuxppc-dev@lists.ozlabs.org>, Joel Stanley <joel@jms.id.au>
Subject: [PATCH] powerpc: suppress some linker warnings in recent linker versions
Date: Mon, 10 Oct 2022 16:57:21 +1100 [thread overview]
Message-ID: <20221010165721.106267e6@canb.auug.org.au> (raw)
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This is a follow on from commit
0d362be5b142 ("Makefile: link with -z noexecstack --no-warn-rwx-segments")
for arch/powerpc/boot to address wanrings like:
ld: warning: opal-calls.o: missing .note.GNU-stack section implies executable stack
ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions
This fixes issue https://github.com/linuxppc/issues/issues/417
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
arch/powerpc/boot/wrapper | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
I have only done a positive test on this i.e. I have binutils v2.39
installed.
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 55978f32fa77..d78c34bd5d41 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -215,6 +215,11 @@ ld_version()
}'
}
+ld_is_lld()
+{
+ ${CROSS}ld -V 2>&1 | grep -q LLD
+}
+
# Do not include PT_INTERP segment when linking pie. Non-pie linking
# just ignores this option.
LD_VERSION=$(${CROSS}ld --version | ld_version)
@@ -223,6 +228,14 @@ if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
nodl="--no-dynamic-linker"
fi
+# suppress some warnings in recent ld versions
+nowarn="-z noexecstack"
+if ! ld_is_lld; then
+ if [ "$LD_VERSION" -ge "$(echo 2.39 | ld_version)" ]; then
+ nowarn="$nowarn --no-warn-rwx-segments"
+ fi
+fi
+
platformo=$object/"$platform".o
lds=$object/zImage.lds
ext=strip
@@ -504,7 +517,7 @@ if [ "$platform" != "miboot" ]; then
text_start="-Ttext $link_address"
fi
#link everything
- ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $rodynamic $notext -o "$ofile" $map \
+ ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
$platformo $tmp $object/wrapper.a
rm $tmp
fi
--
2.35.1
--
Cheers,
Stephen Rothwell
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next reply other threads:[~2022-10-10 5:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-10 5:57 Stephen Rothwell [this message]
2022-11-30 9:24 ` [PATCH] powerpc: suppress some linker warnings in recent linker versions Michael Ellerman
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