image-mklibs: handle position independent binaries
Executables built with -fpie have the ELF type DYN rather than EXEC which makes them difficult to distinguish from shared libraries. Currently when building the list of executables we omit these binaries so they might fail to run on the resultant rootfs due to missing symbols. One of these is systemd which builds -fpie unconditionally, so mklibs breaks images containing systemd. Modify the search to catch all executable files that are ELF and have an interpreter set. Omit libc and libpthread as special cases because they have an interpreter and are directly executable but treating them as such is antithetical to the pupose of mklibs. (From OE-Core rev: 30da34ef032d5b4b2f694743715f2c8d64dd9849) Signed-off-by: Tyler Hall <tylerwhall@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -9,13 +9,15 @@ mklibs_optimize_image_doit() {
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mkdir -p ${WORKDIR}/mklibs/dest
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cd ${IMAGE_ROOTFS}
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du -bs > ${WORKDIR}/mklibs/du.before.mklibs.txt
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for i in `find .`; do file $i; done \
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| grep ELF \
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| grep "LSB *executable" \
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| grep "dynamically linked" \
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| sed "s/:.*//" \
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| sed "s+^\./++" \
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> ${WORKDIR}/mklibs/executables.list
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# Build a list of dynamically linked executable ELF files.
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# Omit libc/libpthread as a special case because it has an interpreter
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# but is primarily what we intend to strip down.
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for i in `find . -type f -executable ! -name 'libc-*' ! -name 'libpthread-*'`; do
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file $i | grep -q ELF || continue
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${HOST_PREFIX}readelf -l $i | grep -q INTERP || continue
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echo $i
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done > ${WORKDIR}/mklibs/executables.list
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dynamic_loader=$(linuxloader)
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