Using elftoolchain trunk
addr2line -f -e ./test/elfdump/ts/dso2/test.so 0xa88
_fini
/home/aurel32/debian/co-packages/glibc/etch/glibc-2.3.6.ds1/build-tree/amd64-libc/csu/crti.S:37
./addr2line/addr2line -f -e ./test/elfdump/ts/dso2/test.so 0xa88
??
??:0
This seems to be a different problem from bug #545, patch attached there doesn't fix this problem.
FreeBSD patch is in review at https://reviews.freebsd.org/D23782