target/linux/generic/backport-5.15/303-v6.2-powerpc-suppress-some-linker-warnings-in-recent-link.patch

   1 From 579aee9fc594af94c242068c011b0233563d4bbf Mon Sep 17 00:00:00 2001
   2 From: Stephen Rothwell <sfr@canb.auug.org.au>
   3 Date: Mon, 10 Oct 2022 16:57:21 +1100
   4 Subject: [PATCH] powerpc: suppress some linker warnings in recent linker
   5  versions
   6
   7 This is a follow on from commit
   8
   9   0d362be5b142 ("Makefile: link with -z noexecstack --no-warn-rwx-segments")
  10
  11 for arch/powerpc/boot to address wanrings like:
  12
  13   ld: warning: opal-calls.o: missing .note.GNU-stack section implies executable stack
  14   ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
  15   ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions
  16
  17 This fixes issue https://github.com/linuxppc/issues/issues/417
  18
  19 Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
  20 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
  21 Link: https://lore.kernel.org/r/20221010165721.106267e6@canb.auug.org.au
  22 ---
  23  arch/powerpc/boot/wrapper | 15 ++++++++++++++-
  24  1 file changed, 14 insertions(+), 1 deletion(-)
  25
  26 --- a/arch/powerpc/boot/wrapper
  27 +++ b/arch/powerpc/boot/wrapper
  28 @@ -213,6 +213,11 @@ ld_version()
  29      }'
  30  }
  31
  32 +ld_is_lld()
  33 +{
  34 +       ${CROSS}ld -V 2>&1 | grep -q LLD
  35 +}
  36 +
  37  # Do not include PT_INTERP segment when linking pie. Non-pie linking
  38  # just ignores this option.
  39  LD_VERSION=$(${CROSS}ld --version | ld_version)
  40 @@ -221,6 +226,14 @@ if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VE
  41         nodl="--no-dynamic-linker"
  42  fi
  43
  44 +# suppress some warnings in recent ld versions
  45 +nowarn="-z noexecstack"
  46 +if ! ld_is_lld; then
  47 +       if [ "$LD_VERSION" -ge "$(echo 2.39 | ld_version)" ]; then
  48 +               nowarn="$nowarn --no-warn-rwx-segments"
  49 +       fi
  50 +fi
  51 +
  52  platformo=$object/"$platform".o
  53  lds=$object/zImage.lds
  54  ext=strip
  55 @@ -502,7 +515,7 @@ if [ "$platform" != "miboot" ]; then
  56          text_start="-Ttext $link_address"
  57      fi
  58  #link everything
  59 -    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $rodynamic $notext -o "$ofile" $map \
  60 +    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
  61         $platformo $tmp $object/wrapper.a
  62      rm $tmp
  63  fi