The boot wrapper performs its own relocations and does not require PT_INTERP segment.
Without this option, binutils 2.28 and newer tries to create a program header segment due to PT_INTERP, and the link fails because there is no space for it. A recent binutils commit: https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=1a9ccd70f9a75dc6b48d340059f28ef3550c107b has broken kernel builds: ld: arch/powerpc/boot/zImage.pseries: Not enough room for program headers, try linking with -N ld: final link failed: Bad value Reported-by: Anton Blanchard <an...@samba.org> Signed-off-by: Nicholas Piggin <npig...@gmail.com> --- Hi, I think this should do the trick (zImage.pseries compiles and boots mambo here, haven't tested zImage.epapr). Cc'ing Alan just in case :) Thanks, Nick arch/powerpc/boot/wrapper | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper index 404b3aa..cd941a8 100755 --- a/arch/powerpc/boot/wrapper +++ b/arch/powerpc/boot/wrapper @@ -181,6 +181,13 @@ case "$elfformat" in elf32-powerpc) format=elf32ppc ;; esac +# Do not include PT_INTERP segment when linking pie. Non-pie linking +# just ignores this option. +LD_VERSION=$(${CROSS}ld --version | $srctree/scripts/ld-version.sh) +LD_NO_DL_MIN_VERSION=$(echo 2.26 | $srctree/scripts/ld-version.sh) +if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then + nodl="--no-dynamic-linker" +fi platformo=$object/"$platform".o lds=$object/zImage.lds @@ -446,7 +453,7 @@ if [ "$platform" != "miboot" ]; then text_start="-Ttext $link_address" fi #link everything - ${CROSS}ld -m $format -T $lds $text_start $pie -o "$ofile" \ + ${CROSS}ld -m $format -T $lds $text_start $pie $nodl -o "$ofile" \ $platformo $tmp $object/wrapper.a rm $tmp fi -- 2.10.2
