1# Copyright (C) 2018-2022 Free Software Foundation, Inc.
2# This file is part of the GNU C Library.
3
4# The GNU C Library is free software; you can redistribute it and/or
5# modify it under the terms of the GNU Lesser General Public
6# License as published by the Free Software Foundation; either
7# version 2.1 of the License, or (at your option) any later version.
8
9# The GNU C Library is distributed in the hope that it will be useful,
10# but WITHOUT ANY WARRANTY; without even the implied warranty of
11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12# Lesser General Public License for more details.
13
14# You should have received a copy of the GNU Lesser General Public
15# License along with the GNU C Library; if not, see
16# <https://www.gnu.org/licenses/>.
17
18# This awk script expects to get command-line files that are each
19# the output of 'readelf -W --dyn-syms' on a single shared object.
20# It exits successfully (0) if none contained _init nor _fini in dynamic
21# symbol table.
22# It fails (1) if any did contain _init or _fini in dynamic symbol table.
23# It fails (2) if the input did not take the expected form.
24
25BEGIN { result = _init = _fini = sanity = 0 }
26
27function check_one(name) {
28  if (!sanity) {
29    print name ": *** input did not look like readelf -d output";
30    result = 2;
31  } else {
32    ok = 1;
33    if (_init) {
34      print name ": *** _init is in dynamic symbol table";
35      result = result ? result : 1;
36      ok = 0;
37    }
38    if (_fini) {
39      print name ": *** _fini is in dynamic symbol table";
40      result = result ? result : 1;
41      ok = 0;
42    }
43    if (ok)
44      print name ": OK";
45  }
46
47  _init = _fini = sanity = 0
48}
49
50FILENAME != lastfile {
51  if (lastfile)
52    check_one(lastfile);
53  lastfile = FILENAME;
54}
55
56$1 == "Symbol" && $2 == "table" && $3 == "'.dynsym'" { sanity = 1 }
57$8 == "_init" { _init = 1 }
58$8 == "_fini" { _fini = 1 }
59
60END {
61  check_one(lastfile);
62  exit(result);
63}
64