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#!/bin/sh
usage() {
echo "Usage: ${0##*/} DIR1 DIR2"
echo
echo "Compares all object files recursivelty found in DIR1 and DIR2."
echo "Prints diff of their disassembly."
echo
exit $1
}
filter() {
# sed removes " address: " prefixes which mess up diff
sed $'s/^\\(\t*\\)[ ]*[0-9a-f][0-9a-f]*:[ \t]*/\\1/' \
| sed 's/__GI_//g'
}
test -d "$1" || usage 1
test -d "$2" || usage 1
{
(
cd "$1" || exit 1
find -name '*.o' # -o -name '*.os' # -o -name '*.so'
)
(
cd "$2" || exit 1
find -name '*.o' # -o -name '*.os' # -o -name '*.so'
)
} | sed 's:^\./::' | sort | uniq | \
(
while IFS='' read -r oname; do
if ! test -f "$1/$oname"; then
echo "Only $2/$oname"
continue
fi
if ! test -f "$2/$oname"; then
echo "Only $1/$oname"
continue
fi
diff -q -- "$1/$oname" "$2/$oname" >/dev/null && continue
(cd "$1" && { size "$oname"; objdump -dr "$oname" | filter; } >"$oname.disasm")
(cd "$2" && { size "$oname"; objdump -dr "$oname" | filter; } >"$oname.disasm")
diff -u -- "$1/$oname.disasm" "$2/$oname.disasm"
done
)
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