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builtools: Make abi_gen.sh less prone to errors

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The mold linker has more hidden symbols and we would need to filter them out
with nm, where objdump tells us which symbols are actually hidden. So we just
need to filter out whatever is hidden.

The use of awk makes it also easier to get what we want.

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
(cherry picked from commit 2b9917d7a3cb88cf48517e4a93a94fa3ca6ff3d9)

Autobuild-User(v4-14-test): Jule Anger <janger@samba.org>
Autobuild-Date(v4-14-test): Wed Mar 30 08:25:14 UTC 2022 on sn-devel-184
This commit is contained in:
Andreas Schneider 2022-02-14 07:59:52 +01:00 committed by Jule Anger
parent 56018a50e7
commit 7ebf719e19
1 changed files with 7 additions and 2 deletions
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9
buildtools/scripts/abi_gen.sh
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@ -10,9 +10,14 @@ cat <<EOF
set height 0
set width 0
EOF
nm "$SHAREDLIB" | cut -d' ' -f2- | egrep '^[BDGTRVWS]' | grep -v @ | egrep -v ' (__bss_start|_edata|_init|_fini|_end)' | cut -c3- | sort | while read s; do
# On older linker versions _init|_fini symbols are not hidden.
objdump --dynamic-syms "${SHAREDLIB}" | \
awk '$0 !~ /.hidden/ {if ($2 == "g" && $3 ~ /D(F|O)/ && $4 ~ /(.bss|.rodata|.text)/) print $NF}' | \
sort | \
while read -r s; do
echo "echo $s: "
echo p $s
echo p "${s}"
done
) > $GDBSCRIPT