#!/bin/sh -efu
#
# Copyright (C) 2010-2011  Alexey Tourbin <at@altlinux.org>
# Copyright (C) 2018  Dmitry V. Levin <ldv@altlinux.org>
# Copyright (C) 2018  Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
# All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0-or-later

export LC_ALL=C

readelf --wide --dyn-syms -- "$@" |
	awk '+$1 && NF>=8 &&
# dl-lookup.c: /st_value
($2!="00000000" && $2!="0000000000000000" || $4=="TLS") &&
# dl-lookup.c: /ALLOWED_STT
($4=="NOTYPE" || $4=="OBJECT" || $4 == "FUNC" || $4=="COMMON" || $4=="TLS" || $4=="IFUNC") &&
# dl-lookup.c: /hidden
($6=="DEFAULT" || $6=="PROTECTED") &&
# dl-lookup.c: /switch.*ST_BIND
($5=="GLOBAL" || $5=="WEAK" || $5 == "UNIQUE") {
	# dl-lookup.c: /st_shndx
	match($0, "[[:space:]][[:digit:]]+[[:space:]]+([^[:space:]()@]+)(@+[^[:space:]()@]+)?$", a)
	sym = a[1]
	if (sym == "" ||
	    # ignore special symbols found in each library
	    sym == "__bss_start" ||
	    sym == "_edata" ||
	    sym == "_end" ||
	    sym == "_fini" ||
	    sym == "_init")
		next
	print sym
}' |
	sort -u