aboutsummaryrefslogtreecommitdiff
path: root/ld/ldelf.c
blob: 049992544a26a780ce57922e23e445524f51c4a1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
/* ELF emulation code for targets using elf.em.
   Copyright (C) 1991-2021 Free Software Foundation, Inc.

   This file is part of the GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "sysdep.h"
#include "bfd.h"
#include "libiberty.h"
#include "filenames.h"
#include "safe-ctype.h"
#include "bfdlink.h"
#include "ctf-api.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldemul.h"
#include "ldbuildid.h"
#include <ldgram.h>
#include "elf-bfd.h"
#ifdef HAVE_GLOB
#include <glob.h>
#endif
#include "ldelf.h"

struct dt_needed
{
  bfd *by;
  const char *name;
};

/* Style of .note.gnu.build-id section.  */
const char *ldelf_emit_note_gnu_build_id;

/* These variables are required to pass information back and forth
   between after_open and check_needed and stat_needed and vercheck.  */

static struct bfd_link_needed_list *global_needed;
static lang_input_statement_type *global_found;
static struct stat global_stat;
static struct bfd_link_needed_list *global_vercheck_needed;
static bfd_boolean global_vercheck_failed;

void
ldelf_after_parse (void)
{
  if (bfd_link_pie (&link_info))
    link_info.flags_1 |= (bfd_vma) DF_1_PIE;

  if (bfd_link_executable (&link_info)
      && link_info.nointerp)
    {
      if (link_info.dynamic_undefined_weak > 0)
	einfo (_("%P: warning: -z dynamic-undefined-weak ignored\n"));
      link_info.dynamic_undefined_weak = 0;
    }
  after_parse_default ();
}

/* Handle the generation of DT_NEEDED tags.  */

bfd_boolean
ldelf_load_symbols (lang_input_statement_type *entry)
{
  int link_class = 0;

  /* Tell the ELF linker that we don't want the output file to have a
     DT_NEEDED entry for this file, unless it is used to resolve
     references in a regular object.  */
  if (entry->flags.add_DT_NEEDED_for_regular)
    link_class = DYN_AS_NEEDED;

  /* Tell the ELF linker that we don't want the output file to have a
     DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
     this file at all.  */
  if (!entry->flags.add_DT_NEEDED_for_dynamic)
    link_class |= DYN_NO_ADD_NEEDED;

  if (entry->flags.just_syms
      && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)
    einfo (_("%F%P: %pB: --just-symbols may not be used on DSO\n"),
	   entry->the_bfd);

  if (link_class == 0
      || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
    return FALSE;

  bfd_elf_set_dyn_lib_class (entry->the_bfd,
			     (enum dynamic_lib_link_class) link_class);

  /* Continue on with normal load_symbols processing.  */
  return FALSE;
}

/* On Linux, it's possible to have different versions of the same
   shared library linked against different versions of libc.  The
   dynamic linker somehow tags which libc version to use in
   /etc/ld.so.cache, and, based on the libc that it sees in the
   executable, chooses which version of the shared library to use.

   We try to do a similar check here by checking whether this shared
   library needs any other shared libraries which may conflict with
   libraries we have already included in the link.  If it does, we
   skip it, and try to find another shared library farther on down the
   link path.

   This is called via lang_for_each_input_file.
   GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
   which we are checking.  This sets GLOBAL_VERCHECK_FAILED if we find
   a conflicting version.  */

static void
ldelf_vercheck (lang_input_statement_type *s)
{
  const char *soname;
  struct bfd_link_needed_list *l;

  if (global_vercheck_failed)
    return;
  if (s->the_bfd == NULL
      || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
    return;

  soname = bfd_elf_get_dt_soname (s->the_bfd);
  if (soname == NULL)
    soname = lbasename (bfd_get_filename (s->the_bfd));

  for (l = global_vercheck_needed; l != NULL; l = l->next)
    {
      const char *suffix;

      if (filename_cmp (soname, l->name) == 0)
	{
	  /* Probably can't happen, but it's an easy check.  */
	  continue;
	}

      if (strchr (l->name, '/') != NULL)
	continue;

      suffix = strstr (l->name, ".so.");
      if (suffix == NULL)
	continue;

      suffix += sizeof ".so." - 1;

      if (filename_ncmp (soname, l->name, suffix - l->name) == 0)
	{
	  /* Here we know that S is a dynamic object FOO.SO.VER1, and
	     the object we are considering needs a dynamic object
	     FOO.SO.VER2, and VER1 and VER2 are different.  This
	     appears to be a version mismatch, so we tell the caller
	     to try a different version of this library.  */
	  global_vercheck_failed = TRUE;
	  return;
	}
    }
}


/* See if an input file matches a DT_NEEDED entry by running stat on
   the file.  */

static void
ldelf_stat_needed (lang_input_statement_type *s)
{
  struct stat st;
  const char *suffix;
  const char *soname;

  if (global_found != NULL)
    return;
  if (s->the_bfd == NULL)
    return;

  /* If this input file was an as-needed entry, and wasn't found to be
     needed at the stage it was linked, then don't say we have loaded it.  */
  if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
    return;

  if (bfd_stat (s->the_bfd, &st) != 0)
    {
      einfo (_("%P: %pB: bfd_stat failed: %E\n"), s->the_bfd);
      return;
    }

  /* Some operating systems, e.g. Windows, do not provide a meaningful
     st_ino; they always set it to zero.  (Windows does provide a
     meaningful st_dev.)  Do not indicate a duplicate library in that
     case.  While there is no guarantee that a system that provides
     meaningful inode numbers will never set st_ino to zero, this is
     merely an optimization, so we do not need to worry about false
     negatives.  */
  if (st.st_dev == global_stat.st_dev
      && st.st_ino == global_stat.st_ino
      && st.st_ino != 0)
    {
      global_found = s;
      return;
    }

  /* We issue a warning if it looks like we are including two
     different versions of the same shared library.  For example,
     there may be a problem if -lc picks up libc.so.6 but some other
     shared library has a DT_NEEDED entry of libc.so.5.  This is a
     heuristic test, and it will only work if the name looks like
     NAME.so.VERSION.  FIXME: Depending on file names is error-prone.
     If we really want to issue warnings about mixing version numbers
     of shared libraries, we need to find a better way.  */

  if (strchr (global_needed->name, '/') != NULL)
    return;
  suffix = strstr (global_needed->name, ".so.");
  if (suffix == NULL)
    return;
  suffix += sizeof ".so." - 1;

  soname = bfd_elf_get_dt_soname (s->the_bfd);
  if (soname == NULL)
    soname = lbasename (s->filename);

  if (filename_ncmp (soname, global_needed->name,
		     suffix - global_needed->name) == 0)
    einfo (_("%P: warning: %s, needed by %pB, may conflict with %s\n"),
	   global_needed->name, global_needed->by, soname);
}

/* This function is called for each possible name for a dynamic object
   named by a DT_NEEDED entry.  The FORCE parameter indicates whether
   to skip the check for a conflicting version.  */

static bfd_boolean
ldelf_try_needed (struct dt_needed *needed, int force, int is_linux)
{
  bfd *abfd;
  const char *name = needed->name;
  const char *soname;
  int link_class;

  abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));
  if (abfd == NULL)
    {
      if (verbose)
	info_msg (_("attempt to open %s failed\n"), name);
      return FALSE;
    }

  track_dependency_files (name);

  /* Linker needs to decompress sections.  */
  abfd->flags |= BFD_DECOMPRESS;

  if (! bfd_check_format (abfd, bfd_object))
    {
      bfd_close (abfd);
      return FALSE;
    }
  if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
    {
      bfd_close (abfd);
      return FALSE;
    }

  /* For DT_NEEDED, they have to match.  */
  if (abfd->xvec != link_info.output_bfd->xvec)
    {
      bfd_close (abfd);
      return FALSE;
    }

  /* Check whether this object would include any conflicting library
     versions.  If FORCE is set, then we skip this check; we use this
     the second time around, if we couldn't find any compatible
     instance of the shared library.  */

  if (!force)
    {
      struct bfd_link_needed_list *needs;

      if (! bfd_elf_get_bfd_needed_list (abfd, &needs))
	einfo (_("%F%P: %pB: bfd_elf_get_bfd_needed_list failed: %E\n"), abfd);

      if (needs != NULL)
	{
	  global_vercheck_needed = needs;
	  global_vercheck_failed = FALSE;
	  lang_for_each_input_file (ldelf_vercheck);
	  if (global_vercheck_failed)
	    {
	      bfd_close (abfd);
	      /* Return FALSE to force the caller to move on to try
		 another file on the search path.  */
	      return FALSE;
	    }

	  /* But wait!  It gets much worse.  On Linux, if a shared
	     library does not use libc at all, we are supposed to skip
	     it the first time around in case we encounter a shared
	     library later on with the same name which does use the
	     version of libc that we want.  This is much too horrible
	     to use on any system other than Linux.  */
	  if (is_linux)
	    {
	      struct bfd_link_needed_list *l;

	      for (l = needs; l != NULL; l = l->next)
		if (CONST_STRNEQ (l->name, "libc.so"))
		  break;
	      if (l == NULL)
		{
		  bfd_close (abfd);
		  return FALSE;
		}
	    }
	}
    }

  /* We've found a dynamic object matching the DT_NEEDED entry.  */

  /* We have already checked that there is no other input file of the
     same name.  We must now check again that we are not including the
     same file twice.  We need to do this because on many systems
     libc.so is a symlink to, e.g., libc.so.1.  The SONAME entry will
     reference libc.so.1.  If we have already included libc.so, we
     don't want to include libc.so.1 if they are the same file, and we
     can only check that using stat.  */

  if (bfd_stat (abfd, &global_stat) != 0)
    einfo (_("%F%P: %pB: bfd_stat failed: %E\n"), abfd);

  /* First strip off everything before the last '/'.  */
  soname = lbasename (bfd_get_filename (abfd));

  if (verbose)
    info_msg (_("found %s at %s\n"), soname, name);

  global_found = NULL;
  lang_for_each_input_file (ldelf_stat_needed);
  if (global_found != NULL)
    {
      /* Return TRUE to indicate that we found the file, even though
	 we aren't going to do anything with it.  */
      return TRUE;
    }

  /* Specify the soname to use.  */
  bfd_elf_set_dt_needed_name (abfd, soname);

  /* Tell the ELF linker that we don't want the output file to have a
     DT_NEEDED entry for this file, unless it is used to resolve
     references in a regular object.  */
  link_class = DYN_DT_NEEDED;

  /* Tell the ELF linker that we don't want the output file to have a
     DT_NEEDED entry for this file at all if the entry is from a file
     with DYN_NO_ADD_NEEDED.  */
  if (needed->by != NULL
      && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)
    link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;

  bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);

  *link_info.input_bfds_tail = abfd;
  link_info.input_bfds_tail = &abfd->link.next;

  /* Add this file into the symbol table.  */
  if (! bfd_link_add_symbols (abfd, &link_info))
    einfo (_("%F%P: %pB: error adding symbols: %E\n"), abfd);

  return TRUE;
}

/* Search for a needed file in a path.  */

static bfd_boolean
ldelf_search_needed (const char *path, struct dt_needed *n, int force,
		     int is_linux, int elfsize)
{
  const char *s;
  const char *name = n->name;
  size_t len;
  struct dt_needed needed;

  if (name[0] == '/')
    return ldelf_try_needed (n, force, is_linux);

  if (path == NULL || *path == '\0')
    return FALSE;

  needed.by = n->by;
  needed.name = n->name;

  len = strlen (name);
  while (1)
    {
      unsigned offset = 0;
      char * var;
      char *filename, *sset;

      s = strchr (path, config.rpath_separator);
      if (s == NULL)
	s = path + strlen (path);

#if HAVE_DOS_BASED_FILE_SYSTEM
      /* Assume a match on the second char is part of drive specifier.  */
      else if (config.rpath_separator == ':'
	       && s == path + 1
	       && ISALPHA (*path))
	{
	  s = strchr (s + 1, config.rpath_separator);
	  if (s == NULL)
	    s = path + strlen (path);
	}
#endif
      filename = (char *) xmalloc (s - path + len + 2);
      if (s == path)
	sset = filename;
      else
	{
	  memcpy (filename, path, s - path);
	  filename[s - path] = '/';
	  sset = filename + (s - path) + 1;
	}
      strcpy (sset, name);

      /* PR 20535: Support the same pseudo-environment variables that
	 are supported by ld.so.  Namely, $ORIGIN, $LIB and $PLATFORM.
	 Since there can be more than one occurrence of these tokens in
	 the path we loop until no more are found.  Since we might not
	 be able to substitute some of the tokens we maintain an offset
	 into the filename for where we should begin our scan.  */
      while ((var = strchr (filename + offset, '$')) != NULL)
	{
	  /* The ld.so manual page does not say, but I am going to assume that
	     these tokens are terminated by a directory separator character
	     (/) or the end of the string.  There is also an implication that
	     $ORIGIN should only be used at the start of a path, but that is
	     not enforced here.

	     The ld.so manual page also states that it allows ${ORIGIN},
	     ${LIB} and ${PLATFORM}, so these are supported as well.

	     FIXME: The code could be a lot cleverer about allocating space
	     for the processed string.  */
	  char *    end = strchr (var, '/');
	  const char *replacement = NULL;
	  char *    v = var + 1;
	  char *    freeme = NULL;
	  unsigned  flen = strlen (filename);

	  if (end != NULL)
	    /* Temporarily terminate the filename at the end of the token.  */
	    * end = 0;

	  if (*v == '{')
	    ++ v;
	  switch (*v++)
	    {
	    case 'O':
	      if (strcmp (v, "RIGIN") == 0 || strcmp (v, "RIGIN}") == 0)
		{
		  /* ORIGIN - replace with the full path to the directory
		     containing the program or shared object.  */
		  if (needed.by == NULL)
		    {
		      if (link_info.output_bfd == NULL)
			{
			  break;
			}
		      else
			replacement = bfd_get_filename (link_info.output_bfd);
		    }
		  else
		    replacement = bfd_get_filename (needed.by);

		  if (replacement)
		    {
		      char * slash;

		      if (replacement[0] == '/')
			freeme = xstrdup (replacement);
		      else
			{
			  char * current_dir = getpwd ();

			  freeme = xmalloc (strlen (replacement)
					    + strlen (current_dir) + 2);
			  sprintf (freeme, "%s/%s", current_dir, replacement);
			}

		      replacement = freeme;
		      if ((slash = strrchr (replacement, '/')) != NULL)
			* slash = 0;
		    }
		}
	      break;

	    case 'L':
	      if (strcmp (v, "IB") == 0 || strcmp (v, "IB}") == 0)
		{
		  /* LIB - replace with "lib" in 32-bit environments
		     and "lib64" in 64-bit environments.  */

		  switch (elfsize)
		    {
		    case 32: replacement = "lib"; break;
		    case 64: replacement = "lib64"; break;
		    default:
		      abort ();
		    }
		}
	      break;

	    case 'P':
	      /* Supporting $PLATFORM in a cross-hosted environment is not
		 possible.  Supporting it in a native environment involves
		 loading the <sys/auxv.h> header file which loads the
		 system <elf.h> header file, which conflicts with the
		 "include/elf/mips.h" header file.  */
	      /* Fall through.  */
	    default:
	      break;
	    }

	  if (replacement)
	    {
	      char * filename2 = xmalloc (flen + strlen (replacement));

	      if (end)
		{
		  sprintf (filename2, "%.*s%s/%s",
			   (int)(var - filename), filename,
			   replacement, end + 1);
		  offset = (var - filename) + 1 + strlen (replacement);
		}
	      else
		{
		  sprintf (filename2, "%.*s%s",
			   (int)(var - filename), filename,
			   replacement);
		  offset = var - filename + strlen (replacement);
		}

	      free (filename);
	      filename = filename2;
	      /* There is no need to restore the path separator (when
		 end != NULL) as we have replaced the entire string.  */
	    }
	  else
	    {
	      if (verbose)
		/* We only issue an "unrecognised" message in verbose mode
		   as the $<foo> token might be a legitimate component of
		   a path name in the target's file system.  */
		info_msg (_("unrecognised or unsupported token "
			    "'%s' in search path\n"), var);
	      if (end)
		/* Restore the path separator.  */
		* end = '/';

	      /* PR 20784: Make sure that we resume the scan *after*
		 the token that we could not replace.  */
	      offset = (var + 1) - filename;
	    }

	  free (freeme);
	}

      needed.name = filename;

      if (ldelf_try_needed (&needed, force, is_linux))
	return TRUE;

      free (filename);

      if (*s == '\0')
	break;
      path = s + 1;
    }

  return FALSE;
}

/* Prefix the sysroot to absolute paths in PATH, a string containing
   paths separated by config.rpath_separator.  If running on a DOS
   file system, paths containing a drive spec won't have the sysroot
   prefix added, unless the sysroot also specifies the same drive.  */

static const char *
ldelf_add_sysroot (const char *path)
{
  size_t len, extra;
  const char *p;
  char *ret, *q;
  int dos_drive_sysroot = HAS_DRIVE_SPEC (ld_sysroot);

  len = strlen (ld_sysroot);
  for (extra = 0, p = path; ; )
    {
      int dos_drive = HAS_DRIVE_SPEC (p);

      if (dos_drive)
	p += 2;
      if (IS_DIR_SEPARATOR (*p)
	  && (!dos_drive
	      || (dos_drive_sysroot
		  && ld_sysroot[0] == p[-2])))
	{
	  if (dos_drive && dos_drive_sysroot)
	    extra += len - 2;
	  else
	    extra += len;
	}
      p = strchr (p, config.rpath_separator);
      if (!p)
	break;
      ++p;
    }

  ret = xmalloc (strlen (path) + extra + 1);

  for (q = ret, p = path; ; )
    {
      const char *end;
      int dos_drive = HAS_DRIVE_SPEC (p);

      if (dos_drive)
	{
	  *q++ = *p++;
	  *q++ = *p++;
	}
      if (IS_DIR_SEPARATOR (*p)
	  && (!dos_drive
	      || (dos_drive_sysroot
		  && ld_sysroot[0] == p[-2])))
	{
	  if (dos_drive && dos_drive_sysroot)
	    {
	      strcpy (q, ld_sysroot + 2);
	      q += len - 2;
	    }
	  else
	    {
	      strcpy (q, ld_sysroot);
	      q += len;
	    }
	}
      end = strchr (p, config.rpath_separator);
      if (end)
	{
	  size_t n = end - p + 1;
	  strncpy (q, p, n);
	  q += n;
	  p += n;
	}
      else
	{
	  strcpy (q, p);
	  break;
	}
    }

  return ret;
}

/* Read the system search path the FreeBSD way rather than the Linux way.  */
#ifdef HAVE_ELF_HINTS_H
#include <elf-hints.h>
#else
#include "elf-hints-local.h"
#endif

static bfd_boolean
ldelf_check_ld_elf_hints (const struct bfd_link_needed_list *l, int force,
			  int elfsize)
{
  static bfd_boolean initialized;
  static const char *ld_elf_hints;
  struct dt_needed needed;

  if (!initialized)
    {
      FILE *f;
      char *tmppath;

      tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);
      f = fopen (tmppath, FOPEN_RB);
      free (tmppath);
      if (f != NULL)
	{
	  struct elfhints_hdr hdr;

	  if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)
	      && hdr.magic == ELFHINTS_MAGIC
	      && hdr.version == 1)
	    {
	      if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)
		{
		  char *b;

		  b = xmalloc (hdr.dirlistlen + 1);
		  if (fread (b, 1, hdr.dirlistlen + 1, f) ==
		      hdr.dirlistlen + 1)
		    ld_elf_hints = ldelf_add_sysroot (b);

		  free (b);
		}
	    }
	  fclose (f);
	}

      initialized = TRUE;
    }

  if (ld_elf_hints == NULL)
    return FALSE;

  needed.by = l->by;
  needed.name = l->name;
  return ldelf_search_needed (ld_elf_hints, &needed, force, FALSE, elfsize);
}

/* For a native linker, check the file /etc/ld.so.conf for directories
   in which we may find shared libraries.  /etc/ld.so.conf is really
   only meaningful on Linux.  */

struct ldelf_ld_so_conf
{
  char *path;
  size_t len, alloc;
};

static bfd_boolean
ldelf_parse_ld_so_conf (struct ldelf_ld_so_conf *, const char *);

static void
ldelf_parse_ld_so_conf_include (struct ldelf_ld_so_conf *info,
				const char *filename,
				const char *pattern)
{
  char *newp = NULL;
#ifdef HAVE_GLOB
  glob_t gl;
#endif

  if (pattern[0] != '/')
    {
      char *p = strrchr (filename, '/');
      size_t patlen = strlen (pattern) + 1;

      newp = xmalloc (p - filename + 1 + patlen);
      memcpy (newp, filename, p - filename + 1);
      memcpy (newp + (p - filename + 1), pattern, patlen);
      pattern = newp;
    }

#ifdef HAVE_GLOB
  if (glob (pattern, 0, NULL, &gl) == 0)
    {
      size_t i;

      for (i = 0; i < gl.gl_pathc; ++i)
	ldelf_parse_ld_so_conf (info, gl.gl_pathv[i]);
      globfree (&gl);
    }
#else
  /* If we do not have glob, treat the pattern as a literal filename.  */
  ldelf_parse_ld_so_conf (info, pattern);
#endif

  free (newp);
}

static bfd_boolean
ldelf_parse_ld_so_conf (struct ldelf_ld_so_conf *info, const char *filename)
{
  FILE *f = fopen (filename, FOPEN_RT);
  char *line;
  size_t linelen;

  if (f == NULL)
    return FALSE;

  linelen = 256;
  line = xmalloc (linelen);
  do
    {
      char *p = line, *q;

      /* Normally this would use getline(3), but we need to be portable.  */
      while ((q = fgets (p, linelen - (p - line), f)) != NULL
	     && strlen (q) == linelen - (p - line) - 1
	     && line[linelen - 2] != '\n')
	{
	  line = xrealloc (line, 2 * linelen);
	  p = line + linelen - 1;
	  linelen += linelen;
	}

      if (q == NULL && p == line)
	break;

      p = strchr (line, '\n');
      if (p)
	*p = '\0';

      /* Because the file format does not know any form of quoting we
	 can search forward for the next '#' character and if found
	 make it terminating the line.  */
      p = strchr (line, '#');
      if (p)
	*p = '\0';

      /* Remove leading whitespace.  NUL is no whitespace character.  */
      p = line;
      while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')
	++p;

      /* If the line is blank it is ignored.  */
      if (p[0] == '\0')
	continue;

      if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))
	{
	  char *dir, c;
	  p += 8;
	  do
	    {
	      while (*p == ' ' || *p == '\t')
		++p;

	      if (*p == '\0')
		break;

	      dir = p;

	      while (*p != ' ' && *p != '\t' && *p)
		++p;

	      c = *p;
	      *p++ = '\0';
	      if (dir[0] != '\0')
		ldelf_parse_ld_so_conf_include (info, filename, dir);
	    }
	  while (c != '\0');
	}
      else
	{
	  char *dir = p;
	  while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'
		 && *p != '\r' && *p != '\v')
	    ++p;

	  while (p != dir && p[-1] == '/')
	    --p;
	  if (info->path == NULL)
	    {
	      info->alloc = p - dir + 1 + 256;
	      info->path = xmalloc (info->alloc);
	      info->len = 0;
	    }
	  else
	    {
	      if (info->len + 1 + (p - dir) >= info->alloc)
		{
		  info->alloc += p - dir + 256;
		  info->path = xrealloc (info->path, info->alloc);
		}
	      info->path[info->len++] = config.rpath_separator;
	    }
	  memcpy (info->path + info->len, dir, p - dir);
	  info->len += p - dir;
	  info->path[info->len] = '\0';
	}
    }
  while (! feof (f));
  free (line);
  fclose (f);
  return TRUE;
}

static bfd_boolean
ldelf_check_ld_so_conf (const struct bfd_link_needed_list *l, int force,
			int elfsize, const char *prefix)
{
  static bfd_boolean initialized;
  static const char *ld_so_conf;
  struct dt_needed needed;

  if (! initialized)
    {
      char *tmppath;
      struct ldelf_ld_so_conf info;

      info.path = NULL;
      info.len = info.alloc = 0;
      tmppath = concat (ld_sysroot, prefix, "/etc/ld.so.conf",
			(const char *) NULL);
      if (!ldelf_parse_ld_so_conf (&info, tmppath))
	{
	  free (tmppath);
	  tmppath = concat (ld_sysroot, "/etc/ld.so.conf",
			    (const char *) NULL);
	  ldelf_parse_ld_so_conf (&info, tmppath);
	}
      free (tmppath);

      if (info.path)
	{
	  ld_so_conf = ldelf_add_sysroot (info.path);
	  free (info.path);
	}
      initialized = TRUE;
    }

  if (ld_so_conf == NULL)
    return FALSE;


  needed.by = l->by;
  needed.name = l->name;
  return ldelf_search_needed (ld_so_conf, &needed, force, TRUE, elfsize);
}

/* See if an input file matches a DT_NEEDED entry by name.  */

static void
ldelf_check_needed (lang_input_statement_type *s)
{
  const char *soname;

  /* Stop looking if we've found a loaded lib.  */
  if (global_found != NULL
      && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
	  & DYN_AS_NEEDED) == 0)
    return;

  if (s->filename == NULL || s->the_bfd == NULL)
    return;

  /* Don't look for a second non-loaded as-needed lib.  */
  if (global_found != NULL
      && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
    return;

  if (filename_cmp (s->filename, global_needed->name) == 0)
    {
      global_found = s;
      return;
    }

  if (s->flags.search_dirs)
    {
      const char *f = strrchr (s->filename, '/');
      if (f != NULL
	  && filename_cmp (f + 1, global_needed->name) == 0)
	{
	  global_found = s;
	  return;
	}
    }

  soname = bfd_elf_get_dt_soname (s->the_bfd);
  if (soname != NULL
      && filename_cmp (soname, global_needed->name) == 0)
    {
      global_found = s;
      return;
    }
}

/* This is called after all the input files have been opened.  */

void
ldelf_after_open (int use_libpath, int native, int is_linux, int is_freebsd,
		  int elfsize, const char *prefix)
{
  struct bfd_link_needed_list *needed, *l;
  struct elf_link_hash_table *htab;
  asection *s;
  bfd *abfd;
  bfd **save_input_bfd_tail;

  after_open_default ();

  htab = elf_hash_table (&link_info);
  if (!is_elf_hash_table (htab))
    return;

  if (command_line.out_implib_filename)
    {
      unlink_if_ordinary (command_line.out_implib_filename);
      link_info.out_implib_bfd
	= bfd_openw (command_line.out_implib_filename,
		     bfd_get_target (link_info.output_bfd));

      if (link_info.out_implib_bfd == NULL)
	{
	  einfo (_("%F%P: %s: can't open for writing: %E\n"),
		 command_line.out_implib_filename);
	}
    }

  if (ldelf_emit_note_gnu_build_id != NULL)
    {
      /* Find an ELF input.  */
      for (abfd = link_info.input_bfds;
	   abfd != (bfd *) NULL; abfd = abfd->link.next)
	if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
	    && bfd_count_sections (abfd) != 0
	    && !bfd_input_just_syms (abfd))
	  break;

      /* PR 10555: If there are no ELF input files do not try to
	 create a .note.gnu-build-id section.  */
      if (abfd == NULL
	  || !ldelf_setup_build_id (abfd))
	{
	  free ((char *) ldelf_emit_note_gnu_build_id);
	  ldelf_emit_note_gnu_build_id = NULL;
	}
    }

  get_elf_backend_data (link_info.output_bfd)->setup_gnu_properties (&link_info);

  /* Do not allow executable files to be used as inputs to the link.  */
  for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
    {
      if (abfd->xvec->flavour == bfd_target_elf_flavour
	  && !bfd_input_just_syms (abfd)
	  && elf_tdata (abfd) != NULL
	  && elf_tdata (abfd)->elf_header != NULL
	  /* FIXME: Maybe check for other non-supportable types as well ?  */
	  && elf_tdata (abfd)->elf_header->e_type == ET_EXEC)
	einfo (_("%F%P: cannot use executable file '%pB' as input to a link\n"),
	       abfd);
    }

  if (bfd_link_relocatable (&link_info))
    {
      if (link_info.execstack == !link_info.noexecstack)
	{
	  /* PR ld/16744: If "-z [no]execstack" has been specified on the
	     command line and we are perfoming a relocatable link then no
	     PT_GNU_STACK segment will be created and so the
	     linkinfo.[no]execstack values set in _handle_option() will have no
	     effect.  Instead we create a .note.GNU-stack section in much the
	     same way as the assembler does with its --[no]execstack option.  */
	  flagword flags = SEC_READONLY | (link_info.execstack ? SEC_CODE : 0);
	  (void) bfd_make_section_with_flags (link_info.input_bfds,
					      ".note.GNU-stack", flags);
	}
      return;
    }

  if (!link_info.traditional_format)
    {
      bfd *elfbfd = NULL;
      bfd_boolean warn_eh_frame = FALSE;
      int seen_type = 0;

      for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
	{
	  int type = 0;

	  if (bfd_input_just_syms (abfd))
	    continue;

	  for (s = abfd->sections; s && type < COMPACT_EH_HDR; s = s->next)
	    {
	      const char *name = bfd_section_name (s);

	      if (bfd_is_abs_section (s->output_section))
		continue;
	      if (CONST_STRNEQ (name, ".eh_frame_entry"))
		type = COMPACT_EH_HDR;
	      else if (strcmp (name, ".eh_frame") == 0 && s->size > 8)
		type = DWARF2_EH_HDR;
	    }

	  if (type != 0)
	    {
	      if (seen_type == 0)
		{
		  seen_type = type;
		}
	      else if (seen_type != type)
		{
		  einfo (_("%F%P: compact frame descriptions incompatible with"
			   " DWARF2 .eh_frame from %pB\n"),
			 type == DWARF2_EH_HDR ? abfd : elfbfd);
		  break;
		}

	      if (!elfbfd
		  && (type == COMPACT_EH_HDR
		      || link_info.eh_frame_hdr_type != 0))
		{
		  if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
		    elfbfd = abfd;

		  warn_eh_frame = TRUE;
		}
	    }

	  if (seen_type == COMPACT_EH_HDR)
	    link_info.eh_frame_hdr_type = COMPACT_EH_HDR;
	}
      if (elfbfd)
	{
	  const struct elf_backend_data *bed;

	  bed = get_elf_backend_data (elfbfd);
	  s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",
					   bed->dynamic_sec_flags
					   | SEC_READONLY);
	  if (s != NULL
	      && bfd_set_section_alignment (s, 2))
	    {
	      htab->eh_info.hdr_sec = s;
	      warn_eh_frame = FALSE;
	    }
	}
      if (warn_eh_frame)
	einfo (_("%P: warning: cannot create .eh_frame_hdr section,"
		 " --eh-frame-hdr ignored\n"));
    }

  /* Get the list of files which appear in DT_NEEDED entries in
     dynamic objects included in the link (often there will be none).
     For each such file, we want to track down the corresponding
     library, and include the symbol table in the link.  This is what
     the runtime dynamic linker will do.  Tracking the files down here
     permits one dynamic object to include another without requiring
     special action by the person doing the link.  Note that the
     needed list can actually grow while we are stepping through this
     loop.  */
  save_input_bfd_tail = link_info.input_bfds_tail;
  needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);
  for (l = needed; l != NULL; l = l->next)
    {
      struct bfd_link_needed_list *ll;
      struct dt_needed n, nn;
      int force;

      /* If the lib that needs this one was --as-needed and wasn't
	 found to be needed, then this lib isn't needed either.  */
      if (l->by != NULL
	  && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
	continue;

      /* Skip the lib if --no-copy-dt-needed-entries and
	 --allow-shlib-undefined is in effect.  */
      if (l->by != NULL
	  && link_info.unresolved_syms_in_shared_libs == RM_IGNORE
	  && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
	continue;

      /* If we've already seen this file, skip it.  */
      for (ll = needed; ll != l; ll = ll->next)
	if ((ll->by == NULL
	     || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)
	    && strcmp (ll->name, l->name) == 0)
	  break;
      if (ll != l)
	continue;

      /* See if this file was included in the link explicitly.  */
      global_needed = l;
      global_found = NULL;
      lang_for_each_input_file (ldelf_check_needed);
      if (global_found != NULL
	  && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
	      & DYN_AS_NEEDED) == 0)
	continue;

      n.by = l->by;
      n.name = l->name;
      nn.by = l->by;
      if (verbose)
	info_msg (_("%s needed by %pB\n"), l->name, l->by);

      /* As-needed libs specified on the command line (or linker script)
	 take priority over libs found in search dirs.  */
      if (global_found != NULL)
	{
	  nn.name = global_found->filename;
	  if (ldelf_try_needed (&nn, TRUE, is_linux))
	    continue;
	}

      /* We need to find this file and include the symbol table.  We
	 want to search for the file in the same way that the dynamic
	 linker will search.  That means that we want to use
	 rpath_link, rpath, then the environment variable
	 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
	 entries (native only), then the linker script LIB_SEARCH_DIRS.
	 We do not search using the -L arguments.

	 We search twice.  The first time, we skip objects which may
	 introduce version mismatches.  The second time, we force
	 their use.  See ldelf_vercheck comment.  */
      for (force = 0; force < 2; force++)
	{
	  size_t len;
	  search_dirs_type *search;
	  const char *path;
	  struct bfd_link_needed_list *rp;
	  int found;

	  if (ldelf_search_needed (command_line.rpath_link, &n, force,
				   is_linux, elfsize))
	    break;

	  if (use_libpath)
	    {
	      path = command_line.rpath;
	      if (path)
		{
		  path = ldelf_add_sysroot (path);
		  found = ldelf_search_needed (path, &n, force,
					       is_linux, elfsize);
		  free ((char *) path);
		  if (found)
		    break;
		}
	    }
	  if (native)
	    {
	      if (command_line.rpath_link == NULL
		  && command_line.rpath == NULL)
		{
		  path = (const char *) getenv ("LD_RUN_PATH");
		  if (path
		      && ldelf_search_needed (path, &n, force,
					      is_linux, elfsize))
		    break;
		}
	      path = (const char *) getenv ("LD_LIBRARY_PATH");
	      if (path
		  && ldelf_search_needed (path, &n, force,
					  is_linux, elfsize))
		break;
	    }
	  if (use_libpath)
	    {
	      found = 0;
	      rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);
	      for (; !found && rp != NULL; rp = rp->next)
		{
		  path = ldelf_add_sysroot (rp->name);
		  found = (rp->by == l->by
			   && ldelf_search_needed (path, &n, force,
						   is_linux, elfsize));
		  free ((char *) path);
		}
	      if (found)
		break;

	      if (is_freebsd
		  && ldelf_check_ld_elf_hints (l, force, elfsize))
		break;

	      if (is_linux
		  && ldelf_check_ld_so_conf (l, force, elfsize, prefix))
		break;
	    }

	  len = strlen (l->name);
	  for (search = search_head; search != NULL; search = search->next)
	    {
	      char *filename;

	      if (search->cmdline)
		continue;
	      filename = (char *) xmalloc (strlen (search->name) + len + 2);
	      sprintf (filename, "%s/%s", search->name, l->name);
	      nn.name = filename;
	      if (ldelf_try_needed (&nn, force, is_linux))
		break;
	      free (filename);
	    }
	  if (search != NULL)
	    break;
	}

      if (force < 2)
	continue;

      einfo (_("%P: warning: %s, needed by %pB, not found "
	       "(try using -rpath or -rpath-link)\n"),
	     l->name, l->by);
    }

  for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
    if (bfd_get_format (abfd) == bfd_object
	&& ((abfd->flags) & DYNAMIC) != 0
	&& bfd_get_flavour (abfd) == bfd_target_elf_flavour
	&& (elf_dyn_lib_class (abfd) & (DYN_AS_NEEDED | DYN_NO_NEEDED)) == 0
	&& elf_dt_name (abfd) != NULL)
      {
	if (bfd_elf_add_dt_needed_tag (abfd, &link_info) < 0)
	  einfo (_("%F%P: failed to add DT_NEEDED dynamic tag\n"));
      }

  link_info.input_bfds_tail = save_input_bfd_tail;
  *save_input_bfd_tail = NULL;

  if (link_info.eh_frame_hdr_type == COMPACT_EH_HDR)
    if (!bfd_elf_parse_eh_frame_entries (NULL, &link_info))
      einfo (_("%F%P: failed to parse EH frame entries\n"));
}

static bfd_size_type
id_note_section_size (bfd *abfd ATTRIBUTE_UNUSED)
{
  const char *style = ldelf_emit_note_gnu_build_id;
  bfd_size_type size;
  bfd_size_type build_id_size;

  size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
  size = (size + 3) & -(bfd_size_type) 4;

  build_id_size = compute_build_id_size (style);
  if (build_id_size)
    size += build_id_size;
  else
    size = 0;

  return size;
}

static bfd_boolean
write_build_id (bfd *abfd)
{
  const struct elf_backend_data *bed = get_elf_backend_data (abfd);
  struct elf_obj_tdata *t = elf_tdata (abfd);
  const char *style;
  asection *asec;
  Elf_Internal_Shdr *i_shdr;
  unsigned char *contents, *id_bits;
  bfd_size_type size;
  file_ptr position;
  Elf_External_Note *e_note;

  style = t->o->build_id.style;
  asec = t->o->build_id.sec;
  if (bfd_is_abs_section (asec->output_section))
    {
      einfo (_("%P: warning: .note.gnu.build-id section discarded,"
	       " --build-id ignored\n"));
      return TRUE;
    }
  i_shdr = &elf_section_data (asec->output_section)->this_hdr;

  if (i_shdr->contents == NULL)
    {
      if (asec->contents == NULL)
	asec->contents = (unsigned char *) xmalloc (asec->size);
      contents = asec->contents;
    }
  else
    contents = i_shdr->contents + asec->output_offset;

  e_note = (Elf_External_Note *) contents;
  size = offsetof (Elf_External_Note, name[sizeof "GNU"]);
  size = (size + 3) & -(bfd_size_type) 4;
  id_bits = contents + size;
  size = asec->size - size;

  bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
  bfd_h_put_32 (abfd, size, &e_note->descsz);
  bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);
  memcpy (e_note->name, "GNU", sizeof "GNU");

  generate_build_id (abfd, style, bed->s->checksum_contents, id_bits, size);

  position = i_shdr->sh_offset + asec->output_offset;
  size = asec->size;
  return (bfd_seek (abfd, position, SEEK_SET) == 0
	  && bfd_bwrite (contents, size, abfd) == size);
}

/* Make .note.gnu.build-id section, and set up elf_tdata->build_id.  */

bfd_boolean
ldelf_setup_build_id (bfd *ibfd)
{
  asection *s;
  bfd_size_type size;
  flagword flags;

  size = id_note_section_size (ibfd);
  if (size == 0)
    {
      einfo (_("%P: warning: unrecognized --build-id style ignored\n"));
      return FALSE;
    }

  flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
	   | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
  s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags);
  if (s != NULL && bfd_set_section_alignment (s, 2))
    {
      struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
      t->o->build_id.after_write_object_contents = &write_build_id;
      t->o->build_id.style = ldelf_emit_note_gnu_build_id;
      t->o->build_id.sec = s;
      elf_section_type (s) = SHT_NOTE;
      s->size = size;
      return TRUE;
    }

  einfo (_("%P: warning: cannot create .note.gnu.build-id section,"
	   " --build-id ignored\n"));
  return FALSE;
}

/* Look through an expression for an assignment statement.  */

static void
ldelf_find_exp_assignment (etree_type *exp)
{
  bfd_boolean provide = FALSE;

  switch (exp->type.node_class)
    {
    case etree_provide:
    case etree_provided:
      provide = TRUE;
      /* Fallthru */
    case etree_assign:
      /* We call record_link_assignment even if the symbol is defined.
	 This is because if it is defined by a dynamic object, we
	 actually want to use the value defined by the linker script,
	 not the value from the dynamic object (because we are setting
	 symbols like etext).  If the symbol is defined by a regular
	 object, then, as it happens, calling record_link_assignment
	 will do no harm.  */
      if (strcmp (exp->assign.dst, ".") != 0)
	{
	  if (!bfd_elf_record_link_assignment (link_info.output_bfd,
					       &link_info,
					       exp->assign.dst, provide,
					       exp->assign.hidden))
	    einfo (_("%F%P: failed to record assignment to %s: %E\n"),
		   exp->assign.dst);
	}
      ldelf_find_exp_assignment (exp->assign.src);
      break;

    case etree_binary:
      ldelf_find_exp_assignment (exp->binary.lhs);
      ldelf_find_exp_assignment (exp->binary.rhs);
      break;

    case etree_trinary:
      ldelf_find_exp_assignment (exp->trinary.cond);
      ldelf_find_exp_assignment (exp->trinary.lhs);
      ldelf_find_exp_assignment (exp->trinary.rhs);
      break;

    case etree_unary:
      ldelf_find_exp_assignment (exp->unary.child);
      break;

    default:
      break;
    }
}

/* This is called by the before_allocation routine via
   lang_for_each_statement.  It locates any assignment statements, and
   tells the ELF backend about them, in case they are assignments to
   symbols which are referred to by dynamic objects.  */

static void
ldelf_find_statement_assignment (lang_statement_union_type *s)
{
  if (s->header.type == lang_assignment_statement_enum)
    ldelf_find_exp_assignment (s->assignment_statement.exp);
}

/* Used by before_allocation and handle_option. */

void
ldelf_append_to_separated_string (char **to, char *op_arg)
{
  if (*to == NULL)
    *to = xstrdup (op_arg);
  else
    {
      size_t to_len = strlen (*to);
      size_t op_arg_len = strlen (op_arg);
      char *buf;
      char *cp = *to;

      /* First see whether OPTARG is already in the path.  */
      do
	{
	  if (strncmp (op_arg, cp, op_arg_len) == 0
	      && (cp[op_arg_len] == 0
		  || cp[op_arg_len] == config.rpath_separator))
	    /* We found it.  */
	    break;

	  /* Not yet found.  */
	  cp = strchr (cp, config.rpath_separator);
	  if (cp != NULL)
	    ++cp;
	}
      while (cp != NULL);

      if (cp == NULL)
	{
	  buf = xmalloc (to_len + op_arg_len + 2);
	  sprintf (buf, "%s%c%s", *to,
		   config.rpath_separator, op_arg);
	  free (*to);
	  *to = buf;
	}
    }
}

/* This is called after the sections have been attached to output
   sections, but before any sizes or addresses have been set.  */

void
ldelf_before_allocation (char *audit, char *depaudit,
			 const char *default_interpreter_name)
{
  const char *rpath;
  asection *sinterp;
  bfd *abfd;
  struct bfd_link_hash_entry *ehdr_start = NULL;
  unsigned char ehdr_start_save_type = 0;
  char ehdr_start_save_u[sizeof ehdr_start->u
			 - sizeof ehdr_start->u.def.next] = "";

  if (is_elf_hash_table (link_info.hash))
    {
      _bfd_elf_tls_setup (link_info.output_bfd, &link_info);

      /* Make __ehdr_start hidden if it has been referenced, to
	 prevent the symbol from being dynamic.  */
      if (!bfd_link_relocatable (&link_info))
	{
	  struct elf_link_hash_table *htab = elf_hash_table (&link_info);
	  struct elf_link_hash_entry *h
	    = elf_link_hash_lookup (htab, "__ehdr_start", FALSE, FALSE, TRUE);

	  /* Only adjust the export class if the symbol was referenced
	     and not defined, otherwise leave it alone.  */
	  if (h != NULL
	      && (h->root.type == bfd_link_hash_new
		  || h->root.type == bfd_link_hash_undefined
		  || h->root.type == bfd_link_hash_undefweak
		  || h->root.type == bfd_link_hash_common))
	    {
	      const struct elf_backend_data *bed;
	      bed = get_elf_backend_data (link_info.output_bfd);
	      (*bed->elf_backend_hide_symbol) (&link_info, h, TRUE);
	      if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL)
		h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN;
	      /* Don't leave the symbol undefined.  Undefined hidden
		 symbols typically won't have dynamic relocations, but
		 we most likely will need dynamic relocations for
		 __ehdr_start if we are building a PIE or shared
		 library.  */
	      ehdr_start = &h->root;
	      ehdr_start_save_type = ehdr_start->type;
	      memcpy (ehdr_start_save_u,
		      (char *) &ehdr_start->u + sizeof ehdr_start->u.def.next,
		      sizeof ehdr_start_save_u);
	      ehdr_start->type = bfd_link_hash_defined;
	      /* It will be converted to section-relative later.  */
	      ehdr_start->rel_from_abs = 1;
	      ehdr_start->u.def.section = bfd_abs_section_ptr;
	      ehdr_start->u.def.value = 0;
	    }
	}

      /* If we are going to make any variable assignments, we need to
	 let the ELF backend know about them in case the variables are
	 referred to by dynamic objects.  */
      lang_for_each_statement (ldelf_find_statement_assignment);
    }

  /* Let the ELF backend work out the sizes of any sections required
     by dynamic linking.  */
  rpath = command_line.rpath;
  if (rpath == NULL)
    rpath = (const char *) getenv ("LD_RUN_PATH");

  for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next)
    if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
      {
	const char *audit_libs = elf_dt_audit (abfd);

	/* If the input bfd contains an audit entry, we need to add it as
	   a dep audit entry.  */
	if (audit_libs && *audit_libs != '\0')
	  {
	    char *cp = xstrdup (audit_libs);
	    do
	      {
		int more = 0;
		char *cp2 = strchr (cp, config.rpath_separator);

		if (cp2)
		  {
		    *cp2 = '\0';
		    more = 1;
		  }

		if (cp != NULL && *cp != '\0')
		  ldelf_append_to_separated_string (&depaudit, cp);

		cp = more ? ++cp2 : NULL;
	      }
	    while (cp != NULL);
	  }
      }

  if (! (bfd_elf_size_dynamic_sections
	 (link_info.output_bfd, command_line.soname, rpath,
	  command_line.filter_shlib, audit, depaudit,
	  (const char * const *) command_line.auxiliary_filters,
	  &link_info, &sinterp)))
    einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));

  if (sinterp != NULL)
    {
      /* Let the user override the dynamic linker we are using.  */
      if (command_line.interpreter != NULL)
	default_interpreter_name = command_line.interpreter;
      if (default_interpreter_name != NULL)
	{
	  sinterp->contents = (bfd_byte *) default_interpreter_name;
	  sinterp->size = strlen ((char *) sinterp->contents) + 1;
	}
    }

  /* Look for any sections named .gnu.warning.  As a GNU extensions,
     we treat such sections as containing warning messages.  We print
     out the warning message, and then zero out the section size so
     that it does not get copied into the output file.  */

  {
    LANG_FOR_EACH_INPUT_STATEMENT (is)
      {
	asection *s;
	bfd_size_type sz;
	char *msg;

	if (is->flags.just_syms)
	  continue;

	s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
	if (s == NULL)
	  continue;

	sz = s->size;
	msg = (char *) xmalloc ((size_t) (sz + 1));
	if (! bfd_get_section_contents (is->the_bfd, s,	msg,
					(file_ptr) 0, sz))
	  einfo (_("%F%P: %pB: can't read contents of section .gnu.warning: %E\n"),
		 is->the_bfd);
	msg[sz] = '\0';
	(*link_info.callbacks->warning) (&link_info, msg,
					 (const char *) NULL, is->the_bfd,
					 (asection *) NULL, (bfd_vma) 0);
	free (msg);

	/* Clobber the section size, so that we don't waste space
	   copying the warning into the output file.  If we've already
	   sized the output section, adjust its size.  The adjustment
	   is on rawsize because targets that size sections early will
	   have called lang_reset_memory_regions after sizing.  */
	if (s->output_section != NULL
	    && s->output_section->rawsize >= s->size)
	  s->output_section->rawsize -= s->size;

	s->size = 0;

	/* Also set SEC_EXCLUDE, so that local symbols defined in the
	   warning section don't get copied to the output.  */
	s->flags |= SEC_EXCLUDE | SEC_KEEP;
      }
  }

  before_allocation_default ();

  if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))
    einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));

  if (ehdr_start != NULL)
    {
      /* If we twiddled __ehdr_start to defined earlier, put it back
	 as it was.  */
      ehdr_start->type = ehdr_start_save_type;
      memcpy ((char *) &ehdr_start->u + sizeof ehdr_start->u.def.next,
	      ehdr_start_save_u,
	      sizeof ehdr_start_save_u);
    }
}
/* Try to open a dynamic archive.  This is where we know that ELF
   dynamic libraries have an extension of .so (or .sl on oddball systems
   like hpux).  */

bfd_boolean
ldelf_open_dynamic_archive (const char *arch, search_dirs_type *search,
			    lang_input_statement_type *entry)
{
  const char *filename;
  char *string;
  size_t len;
  bfd_boolean opened = FALSE;

  if (! entry->flags.maybe_archive)
    return FALSE;

  filename = entry->filename;
  len = strlen (search->name) + strlen (filename);
  if (entry->flags.full_name_provided)
    {
      len += sizeof "/";
      string = (char *) xmalloc (len);
      sprintf (string, "%s/%s", search->name, filename);
    }
  else
    {
      size_t xlen = 0;

      len += strlen (arch) + sizeof "/lib.so";
#ifdef EXTRA_SHLIB_EXTENSION
      xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3
	      ? strlen (EXTRA_SHLIB_EXTENSION) - 3
	      : 0);
#endif
      string = (char *) xmalloc (len + xlen);
      sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
#ifdef EXTRA_SHLIB_EXTENSION
      /* Try the .so extension first.  If that fails build a new filename
	 using EXTRA_SHLIB_EXTENSION.  */
      opened = ldfile_try_open_bfd (string, entry);
      if (!opened)
	strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION);
#endif
    }

  if (!opened && !ldfile_try_open_bfd (string, entry))
    {
      free (string);
      return FALSE;
    }

  entry->filename = string;

  /* We have found a dynamic object to include in the link.  The ELF
     backend linker will create a DT_NEEDED entry in the .dynamic
     section naming this file.  If this file includes a DT_SONAME
     entry, it will be used.  Otherwise, the ELF linker will just use
     the name of the file.  For an archive found by searching, like
     this one, the DT_NEEDED entry should consist of just the name of
     the file, without the path information used to find it.  Note
     that we only need to do this if we have a dynamic object; an
     archive will never be referenced by a DT_NEEDED entry.

     FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
     very pretty.  I haven't been able to think of anything that is
     pretty, though.  */
  if (bfd_check_format (entry->the_bfd, bfd_object)
      && (entry->the_bfd->flags & DYNAMIC) != 0)
    {
      ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs);

      /* Rather than duplicating the logic above.  Just use the
	 filename we recorded earlier.  */

      if (!entry->flags.full_name_provided)
	filename = lbasename (entry->filename);
      bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
    }

  return TRUE;
}

/* A variant of lang_output_section_find used by place_orphan.  */

static lang_output_section_statement_type *
output_rel_find (int isdyn, int rela)
{
  lang_output_section_statement_type *lookup;
  lang_output_section_statement_type *last = NULL;
  lang_output_section_statement_type *last_alloc = NULL;
  lang_output_section_statement_type *last_ro_alloc = NULL;
  lang_output_section_statement_type *last_rel = NULL;
  lang_output_section_statement_type *last_rel_alloc = NULL;

  for (lookup = (void *) lang_os_list.head;
       lookup != NULL;
       lookup = lookup->next)
    {
      if (lookup->constraint >= 0
	  && CONST_STRNEQ (lookup->name, ".rel"))
	{
	  int lookrela = lookup->name[4] == 'a';

	  /* .rel.dyn must come before all other reloc sections, to suit
	     GNU ld.so.  */
	  if (isdyn)
	    break;

	  /* Don't place after .rel.plt as doing so results in wrong
	     dynamic tags.  */
	  if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)
	    break;

	  if (rela == lookrela || last_rel == NULL)
	    last_rel = lookup;
	  if ((rela == lookrela || last_rel_alloc == NULL)
	      && lookup->bfd_section != NULL
	      && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
	    last_rel_alloc = lookup;
	}

      last = lookup;
      if (lookup->bfd_section != NULL
	  && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
	{
	  last_alloc = lookup;
	  if ((lookup->bfd_section->flags & SEC_READONLY) != 0)
	    last_ro_alloc = lookup;
	}
    }

  if (last_rel_alloc)
    return last_rel_alloc;

  if (last_rel)
    return last_rel;

  if (last_ro_alloc)
    return last_ro_alloc;

  if (last_alloc)
    return last_alloc;

  return last;
}

/* Return whether IN is suitable to be part of OUT.  */

static bfd_boolean
elf_orphan_compatible (asection *in, asection *out)
{
  /* Non-zero sh_info implies a section with SHF_INFO_LINK with
     unknown semantics for the generic linker, or a SHT_REL/SHT_RELA
     section where sh_info specifies a symbol table.  (We won't see
     SHT_GROUP, SHT_SYMTAB or SHT_DYNSYM sections here.)  We clearly
     can't merge SHT_REL/SHT_RELA using differing symbol tables, and
     shouldn't merge sections with differing unknown semantics.  */
  if (elf_section_data (out)->this_hdr.sh_info
      != elf_section_data (in)->this_hdr.sh_info)
    return FALSE;
  /* We can't merge with a member of an output section group or merge
     two sections with differing SHF_EXCLUDE or other processor and OS
     specific flags when doing a relocatable link.  */
  if (bfd_link_relocatable (&link_info)
      && (elf_next_in_group (out) != NULL
	  || ((elf_section_flags (out) ^ elf_section_flags (in))
	      & (SHF_MASKPROC | SHF_MASKOS)) != 0))
    return FALSE;
  return _bfd_elf_match_sections_by_type (link_info.output_bfd, out,
					  in->owner, in);
}

/* Place an orphan section.  We use this to put random SHF_ALLOC
   sections in the right segment.  */

lang_output_section_statement_type *
ldelf_place_orphan (asection *s, const char *secname, int constraint)
{
  static struct orphan_save hold[] =
    {
      { ".text",
	SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
	0, 0, 0, 0 },
      { ".rodata",
	SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
	0, 0, 0, 0 },
      { ".tdata",
	SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL,
	0, 0, 0, 0 },
      { ".data",
	SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
	0, 0, 0, 0 },
      { ".bss",
	SEC_ALLOC,
	0, 0, 0, 0 },
      { 0,
	SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
	0, 0, 0, 0 },
      { ".interp",
	SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,
	0, 0, 0, 0 },
      { ".sdata",
	SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,
	0, 0, 0, 0 },
      { ".comment",
	SEC_HAS_CONTENTS,
	0, 0, 0, 0 },
    };
  enum orphan_save_index
    {
      orphan_text = 0,
      orphan_rodata,
      orphan_tdata,
      orphan_data,
      orphan_bss,
      orphan_rel,
      orphan_interp,
      orphan_sdata,
      orphan_nonalloc
    };
  static int orphan_init_done = 0;
  struct orphan_save *place;
  lang_output_section_statement_type *after;
  lang_output_section_statement_type *os;
  lang_output_section_statement_type *match_by_name = NULL;
  int isdyn = 0;
  int elfinput = s->owner->xvec->flavour == bfd_target_elf_flavour;
  int elfoutput = link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour;
  unsigned int sh_type = elfinput ? elf_section_type (s) : SHT_NULL;
  flagword flags;
  asection *nexts;

  if (!bfd_link_relocatable (&link_info)
      && link_info.combreloc
      && (s->flags & SEC_ALLOC))
    {
      if (elfinput)
	switch (sh_type)
	  {
	  case SHT_RELA:
	    secname = ".rela.dyn";
	    isdyn = 1;
	    break;
	  case SHT_REL:
	    secname = ".rel.dyn";
	    isdyn = 1;
	    break;
	  default:
	    break;
	  }
      else if (CONST_STRNEQ (secname, ".rel"))
	{
	  secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
	  isdyn = 1;
	}
    }

  if (!bfd_link_relocatable (&link_info)
      && elfinput
      && elfoutput
      && (s->flags & SEC_ALLOC) != 0
      && (elf_tdata (s->owner)->has_gnu_osabi & elf_gnu_osabi_mbind) != 0
      && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
    {
      /* Find the output mbind section with the same type, attributes
	 and sh_info field.  */
      for (os = (void *) lang_os_list.head;
	   os != NULL;
	   os = os->next)
	if (os->bfd_section != NULL
	    && !bfd_is_abs_section (os->bfd_section)
	    && (elf_section_flags (os->bfd_section) & SHF_GNU_MBIND) != 0
	    && ((s->flags & (SEC_ALLOC
			     | SEC_LOAD
			     | SEC_HAS_CONTENTS
			     | SEC_READONLY
			     | SEC_CODE))
		== (os->bfd_section->flags & (SEC_ALLOC
					      | SEC_LOAD
					      | SEC_HAS_CONTENTS
					      | SEC_READONLY
					      | SEC_CODE)))
	    && (elf_section_data (os->bfd_section)->this_hdr.sh_info
		== elf_section_data (s)->this_hdr.sh_info))
	    {
	      lang_add_section (&os->children, s, NULL, NULL, os);
	      return os;
	    }

      /* Create the output mbind section with the ".mbind." prefix
	 in section name.  */
      if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
	secname = ".mbind.bss";
      else if ((s->flags & SEC_READONLY) == 0)
	secname = ".mbind.data";
      else if ((s->flags & SEC_CODE) == 0)
	secname = ".mbind.rodata";
      else
	secname = ".mbind.text";
      elf_tdata (link_info.output_bfd)->has_gnu_osabi |= elf_gnu_osabi_mbind;
    }

  /* Look through the script to see where to place this section.  The
     script includes entries added by previous lang_insert_orphan
     calls, so this loop puts multiple compatible orphans of the same
     name into a single output section.  */
  if (constraint == 0)
    for (os = lang_output_section_find (secname);
	 os != NULL;
	 os = next_matching_output_section_statement (os, 0))
      {
	/* If we don't match an existing output section, tell
	   lang_insert_orphan to create a new output section.  */
	constraint = SPECIAL;

	/* Check to see if we already have an output section statement
	   with this name, and its bfd section has compatible flags.
	   If the section already exists but does not have any flags
	   set, then it has been created by the linker, possibly as a
	   result of a --section-start command line switch.  */
	if (os->bfd_section != NULL
	    && (os->bfd_section->flags == 0
		|| (((s->flags ^ os->bfd_section->flags)
		     & (SEC_LOAD | SEC_ALLOC)) == 0
		    && (!elfinput
			|| !elfoutput
			|| elf_orphan_compatible (s, os->bfd_section)))))
	  {
	    lang_add_section (&os->children, s, NULL, NULL, os);
	    return os;
	  }

	/* Save unused output sections in case we can match them
	   against orphans later.  */
	if (os->bfd_section == NULL)
	  match_by_name = os;
      }

  /* If we didn't match an active output section, see if we matched an
     unused one and use that.  */
  if (match_by_name)
    {
      lang_add_section (&match_by_name->children, s, NULL, NULL, match_by_name);
      return match_by_name;
    }

  if (!orphan_init_done)
    {
      struct orphan_save *ho;

      for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)
	if (ho->name != NULL)
	  {
	    ho->os = lang_output_section_find (ho->name);
	    if (ho->os != NULL && ho->os->flags == 0)
	      ho->os->flags = ho->flags;
	  }
      orphan_init_done = 1;
    }

  /* If this is a final link, then always put .gnu.warning.SYMBOL
     sections into the .text section to get them out of the way.  */
  if (bfd_link_executable (&link_info)
      && CONST_STRNEQ (s->name, ".gnu.warning.")
      && hold[orphan_text].os != NULL)
    {
      os = hold[orphan_text].os;
      lang_add_section (&os->children, s, NULL, NULL, os);
      return os;
    }

  flags = s->flags;
  if (!bfd_link_relocatable (&link_info))
    {
      nexts = s;
      while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts))
	     != NULL)
	if (nexts->output_section == NULL
	    && (nexts->flags & SEC_EXCLUDE) == 0
	    && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0
	    && (nexts->owner->flags & DYNAMIC) == 0
	    && !bfd_input_just_syms (nexts->owner)
	    && _bfd_elf_match_sections_by_type (nexts->owner, nexts,
						s->owner, s))
	  flags = (((flags ^ SEC_READONLY)
		    | (nexts->flags ^ SEC_READONLY))
		   ^ SEC_READONLY);
    }

  /* Decide which segment the section should go in based on the
     section name and section flags.  We put loadable .note sections
     right after the .interp section, so that the PT_NOTE segment is
     stored right after the program headers where the OS can read it
     in the first page.  */

  place = NULL;
  if ((flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
    place = &hold[orphan_nonalloc];
  else if ((flags & SEC_ALLOC) == 0)
    ;
  else if ((flags & SEC_LOAD) != 0
	   && (elfinput
	       ? sh_type == SHT_NOTE
	       : CONST_STRNEQ (secname, ".note")))
    place = &hold[orphan_interp];
  else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
    place = &hold[orphan_bss];
  else if ((flags & SEC_SMALL_DATA) != 0)
    place = &hold[orphan_sdata];
  else if ((flags & SEC_THREAD_LOCAL) != 0)
    place = &hold[orphan_tdata];
  else if ((flags & SEC_READONLY) == 0)
    place = &hold[orphan_data];
  else if ((flags & SEC_LOAD) != 0
	   && (elfinput
	       ? sh_type == SHT_RELA || sh_type == SHT_REL
	       : CONST_STRNEQ (secname, ".rel")))
    place = &hold[orphan_rel];
  else if ((flags & SEC_CODE) == 0)
    place = &hold[orphan_rodata];
  else
    place = &hold[orphan_text];

  after = NULL;
  if (place != NULL)
    {
      if (place->os == NULL)
	{
	  if (place->name != NULL)
	    place->os = lang_output_section_find (place->name);
	  else
	    {
	      int rela = elfinput ? sh_type == SHT_RELA : secname[4] == 'a';
	      place->os = output_rel_find (isdyn, rela);
	    }
	}
      after = place->os;
      if (after == NULL)
	after
	  = lang_output_section_find_by_flags (s, flags, &place->os,
					       _bfd_elf_match_sections_by_type);
      if (after == NULL)
	/* *ABS* is always the first output section statement.  */
	after = (void *) lang_os_list.head;
    }

  return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);
}

void
ldelf_before_place_orphans (void)
{
  bfd *abfd;

  for (abfd = link_info.input_bfds;
       abfd != (bfd *) NULL; abfd = abfd->link.next)
    if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
	&& bfd_count_sections (abfd) != 0
	&& !bfd_input_just_syms (abfd))
      {
	asection *isec;
	for (isec = abfd->sections; isec != NULL; isec = isec->next)
	  {
	    /* Discard a section if any of its linked-to section has
	       been discarded.  */
	    asection *linked_to_sec;
	    for (linked_to_sec = elf_linked_to_section (isec);
		 linked_to_sec != NULL && !linked_to_sec->linker_mark;
		 linked_to_sec = elf_linked_to_section (linked_to_sec))
	      {
		if (discarded_section (linked_to_sec))
		  {
		    isec->output_section = bfd_abs_section_ptr;
		    isec->flags |= SEC_EXCLUDE;
		    break;
		  }
		linked_to_sec->linker_mark = 1;
	      }
	    for (linked_to_sec = elf_linked_to_section (isec);
		 linked_to_sec != NULL && linked_to_sec->linker_mark;
		 linked_to_sec = elf_linked_to_section (linked_to_sec))
	      linked_to_sec->linker_mark = 0;
	  }
      }
}