aboutsummaryrefslogtreecommitdiff
blob: 54ef8906379163532cbfce7fdba81658b14d70ff (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
/* ELF executable support for BFD.
   Copyright (C) 1991-2020 Free Software Foundation, Inc.

   Written by Fred Fish @ Cygnus Support, from information published
   in "UNIX System V Release 4, Programmers Guide: ANSI C and
   Programming Support Tools".  Sufficient support for gdb.

   Rewritten by Mark Eichin @ Cygnus Support, from information
   published in "System V Application Binary Interface", chapters 4
   and 5, as well as the various "Processor Supplement" documents
   derived from it. Added support for assembler and other object file
   utilities.  Further work done by Ken Raeburn (Cygnus Support), Michael
   Meissner (Open Software Foundation), and Peter Hoogenboom (University
   of Utah) to finish and extend this.

   This file is part of BFD, the Binary File Descriptor library.

   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.  */


/* Problems and other issues to resolve.

   (1)	BFD expects there to be some fixed number of "sections" in
	the object file.  I.E. there is a "section_count" variable in the
	bfd structure which contains the number of sections.  However, ELF
	supports multiple "views" of a file.  In particular, with current
	implementations, executable files typically have two tables, a
	program header table and a section header table, both of which
	partition the executable.

	In ELF-speak, the "linking view" of the file uses the section header
	table to access "sections" within the file, and the "execution view"
	uses the program header table to access "segments" within the file.
	"Segments" typically may contain all the data from one or more
	"sections".

	Note that the section header table is optional in ELF executables,
	but it is this information that is most useful to gdb.  If the
	section header table is missing, then gdb should probably try
	to make do with the program header table.  (FIXME)

   (2)  The code in this file is compiled twice, once in 32-bit mode and
	once in 64-bit mode.  More of it should be made size-independent
	and moved into elf.c.

   (3)	ELF section symbols are handled rather sloppily now.  This should
	be cleaned up, and ELF section symbols reconciled with BFD section
	symbols.

   (4)  We need a published spec for 64-bit ELF.  We've got some stuff here
	that we're using for SPARC V9 64-bit chips, but don't assume that
	it's cast in stone.
 */

#include "sysdep.h"
#include "bfd.h"
#include "libiberty.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "libiberty.h"

/* Renaming structures, typedefs, macros and functions to be size-specific.  */
#define Elf_External_Ehdr	NAME(Elf,External_Ehdr)
#define Elf_External_Sym	NAME(Elf,External_Sym)
#define Elf_External_Shdr	NAME(Elf,External_Shdr)
#define Elf_External_Phdr	NAME(Elf,External_Phdr)
#define Elf_External_Rel	NAME(Elf,External_Rel)
#define Elf_External_Rela	NAME(Elf,External_Rela)
#define Elf_External_Dyn	NAME(Elf,External_Dyn)

#define elf_core_file_failing_command	NAME(bfd_elf,core_file_failing_command)
#define elf_core_file_failing_signal	NAME(bfd_elf,core_file_failing_signal)
#define elf_core_file_matches_executable_p \
  NAME(bfd_elf,core_file_matches_executable_p)
#define elf_core_file_pid		NAME(bfd_elf,core_file_pid)
#define elf_object_p			NAME(bfd_elf,object_p)
#define elf_core_file_p			NAME(bfd_elf,core_file_p)
#define elf_get_symtab_upper_bound	NAME(bfd_elf,get_symtab_upper_bound)
#define elf_get_dynamic_symtab_upper_bound \
  NAME(bfd_elf,get_dynamic_symtab_upper_bound)
#define elf_swap_reloc_in		NAME(bfd_elf,swap_reloc_in)
#define elf_swap_reloca_in		NAME(bfd_elf,swap_reloca_in)
#define elf_swap_reloc_out		NAME(bfd_elf,swap_reloc_out)
#define elf_swap_reloca_out		NAME(bfd_elf,swap_reloca_out)
#define elf_swap_symbol_in		NAME(bfd_elf,swap_symbol_in)
#define elf_swap_symbol_out		NAME(bfd_elf,swap_symbol_out)
#define elf_swap_phdr_in		NAME(bfd_elf,swap_phdr_in)
#define elf_swap_phdr_out		NAME(bfd_elf,swap_phdr_out)
#define elf_swap_dyn_in			NAME(bfd_elf,swap_dyn_in)
#define elf_swap_dyn_out		NAME(bfd_elf,swap_dyn_out)
#define elf_get_reloc_upper_bound	NAME(bfd_elf,get_reloc_upper_bound)
#define elf_canonicalize_reloc		NAME(bfd_elf,canonicalize_reloc)
#define elf_slurp_symbol_table		NAME(bfd_elf,slurp_symbol_table)
#define elf_canonicalize_symtab		NAME(bfd_elf,canonicalize_symtab)
#define elf_canonicalize_dynamic_symtab \
  NAME(bfd_elf,canonicalize_dynamic_symtab)
#define elf_get_synthetic_symtab \
  NAME(bfd_elf,get_synthetic_symtab)
#define elf_make_empty_symbol		NAME(bfd_elf,make_empty_symbol)
#define elf_get_symbol_info		NAME(bfd_elf,get_symbol_info)
#define elf_get_lineno			NAME(bfd_elf,get_lineno)
#define elf_set_arch_mach		NAME(bfd_elf,set_arch_mach)
#define elf_find_nearest_line		NAME(bfd_elf,find_nearest_line)
#define elf_sizeof_headers		NAME(bfd_elf,sizeof_headers)
#define elf_set_section_contents	NAME(bfd_elf,set_section_contents)
#define elf_no_info_to_howto		NAME(bfd_elf,no_info_to_howto)
#define elf_no_info_to_howto_rel	NAME(bfd_elf,no_info_to_howto_rel)
#define elf_find_section		NAME(bfd_elf,find_section)
#define elf_write_shdrs_and_ehdr	NAME(bfd_elf,write_shdrs_and_ehdr)
#define elf_write_out_phdrs		NAME(bfd_elf,write_out_phdrs)
#define elf_checksum_contents		NAME(bfd_elf,checksum_contents)
#define elf_write_relocs		NAME(bfd_elf,write_relocs)
#define elf_slurp_reloc_table		NAME(bfd_elf,slurp_reloc_table)

#if ARCH_SIZE == 64
#define ELF_R_INFO(X,Y)	ELF64_R_INFO(X,Y)
#define ELF_R_SYM(X)	ELF64_R_SYM(X)
#define ELF_R_TYPE(X)	ELF64_R_TYPE(X)
#define ELFCLASS	ELFCLASS64
#define FILE_ALIGN	8
#define LOG_FILE_ALIGN	3
#endif
#if ARCH_SIZE == 32
#define ELF_R_INFO(X,Y)	ELF32_R_INFO(X,Y)
#define ELF_R_SYM(X)	ELF32_R_SYM(X)
#define ELF_R_TYPE(X)	ELF32_R_TYPE(X)
#define ELFCLASS	ELFCLASS32
#define FILE_ALIGN	4
#define LOG_FILE_ALIGN	2
#endif

#if DEBUG & 2
static void elf_debug_section (int, Elf_Internal_Shdr *);
#endif
#if DEBUG & 1
static void elf_debug_file (Elf_Internal_Ehdr *);
#endif

/* Structure swapping routines */

/* Should perhaps use put_offset, put_word, etc.  For now, the two versions
   can be handled by explicitly specifying 32 bits or "the long type".  */
#if ARCH_SIZE == 64
#define H_PUT_WORD		H_PUT_64
#define H_PUT_SIGNED_WORD	H_PUT_S64
#define H_GET_WORD		H_GET_64
#define H_GET_SIGNED_WORD	H_GET_S64
#endif
#if ARCH_SIZE == 32
#define H_PUT_WORD		H_PUT_32
#define H_PUT_SIGNED_WORD	H_PUT_S32
#define H_GET_WORD		H_GET_32
#define H_GET_SIGNED_WORD	H_GET_S32
#endif

/* Translate an ELF symbol in external format into an ELF symbol in internal
   format.  */

bfd_boolean
elf_swap_symbol_in (bfd *abfd,
		    const void *psrc,
		    const void *pshn,
		    Elf_Internal_Sym *dst)
{
  const Elf_External_Sym *src = (const Elf_External_Sym *) psrc;
  const Elf_External_Sym_Shndx *shndx = (const Elf_External_Sym_Shndx *) pshn;
  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;

  dst->st_name = H_GET_32 (abfd, src->st_name);
  if (signed_vma)
    dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value);
  else
    dst->st_value = H_GET_WORD (abfd, src->st_value);
  dst->st_size = H_GET_WORD (abfd, src->st_size);
  dst->st_info = H_GET_8 (abfd, src->st_info);
  dst->st_other = H_GET_8 (abfd, src->st_other);
  dst->st_shndx = H_GET_16 (abfd, src->st_shndx);
  if (dst->st_shndx == (SHN_XINDEX & 0xffff))
    {
      if (shndx == NULL)
	return FALSE;
      dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx);
    }
  else if (dst->st_shndx >= (SHN_LORESERVE & 0xffff))
    dst->st_shndx += SHN_LORESERVE - (SHN_LORESERVE & 0xffff);
  dst->st_target_internal = 0;
  return TRUE;
}

/* Translate an ELF symbol in internal format into an ELF symbol in external
   format.  */

void
elf_swap_symbol_out (bfd *abfd,
		     const Elf_Internal_Sym *src,
		     void *cdst,
		     void *shndx)
{
  unsigned int tmp;
  Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
  H_PUT_32 (abfd, src->st_name, dst->st_name);
  H_PUT_WORD (abfd, src->st_value, dst->st_value);
  H_PUT_WORD (abfd, src->st_size, dst->st_size);
  H_PUT_8 (abfd, src->st_info, dst->st_info);
  H_PUT_8 (abfd, src->st_other, dst->st_other);
  tmp = src->st_shndx;
  if (tmp >= (SHN_LORESERVE & 0xffff) && tmp < SHN_LORESERVE)
    {
      if (shndx == NULL)
	abort ();
      H_PUT_32 (abfd, tmp, shndx);
      tmp = SHN_XINDEX & 0xffff;
    }
  H_PUT_16 (abfd, tmp, dst->st_shndx);
}

/* Translate an ELF file header in external format into an ELF file header in
   internal format.  */

static void
elf_swap_ehdr_in (bfd *abfd,
		  const Elf_External_Ehdr *src,
		  Elf_Internal_Ehdr *dst)
{
  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
  memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
  dst->e_type = H_GET_16 (abfd, src->e_type);
  dst->e_machine = H_GET_16 (abfd, src->e_machine);
  dst->e_version = H_GET_32 (abfd, src->e_version);
  if (signed_vma)
    dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry);
  else
    dst->e_entry = H_GET_WORD (abfd, src->e_entry);
  dst->e_phoff = H_GET_WORD (abfd, src->e_phoff);
  dst->e_shoff = H_GET_WORD (abfd, src->e_shoff);
  dst->e_flags = H_GET_32 (abfd, src->e_flags);
  dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize);
  dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize);
  dst->e_phnum = H_GET_16 (abfd, src->e_phnum);
  dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize);
  dst->e_shnum = H_GET_16 (abfd, src->e_shnum);
  dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx);
}

/* Translate an ELF file header in internal format into an ELF file header in
   external format.  */

static void
elf_swap_ehdr_out (bfd *abfd,
		   const Elf_Internal_Ehdr *src,
		   Elf_External_Ehdr *dst)
{
  unsigned int tmp;
  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
  memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
  /* note that all elements of dst are *arrays of unsigned char* already...  */
  H_PUT_16 (abfd, src->e_type, dst->e_type);
  H_PUT_16 (abfd, src->e_machine, dst->e_machine);
  H_PUT_32 (abfd, src->e_version, dst->e_version);
  if (signed_vma)
    H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry);
  else
    H_PUT_WORD (abfd, src->e_entry, dst->e_entry);
  H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff);
  H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff);
  H_PUT_32 (abfd, src->e_flags, dst->e_flags);
  H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize);
  H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize);
  tmp = src->e_phnum;
  if (tmp > PN_XNUM)
    tmp = PN_XNUM;
  H_PUT_16 (abfd, tmp, dst->e_phnum);
  H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize);
  tmp = src->e_shnum;
  if (tmp >= (SHN_LORESERVE & 0xffff))
    tmp = SHN_UNDEF;
  H_PUT_16 (abfd, tmp, dst->e_shnum);
  tmp = src->e_shstrndx;
  if (tmp >= (SHN_LORESERVE & 0xffff))
    tmp = SHN_XINDEX & 0xffff;
  H_PUT_16 (abfd, tmp, dst->e_shstrndx);
}

/* Translate an ELF section header table entry in external format into an
   ELF section header table entry in internal format.  */

static void
elf_swap_shdr_in (bfd *abfd,
		  const Elf_External_Shdr *src,
		  Elf_Internal_Shdr *dst)
{
  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;

  dst->sh_name = H_GET_32 (abfd, src->sh_name);
  dst->sh_type = H_GET_32 (abfd, src->sh_type);
  dst->sh_flags = H_GET_WORD (abfd, src->sh_flags);
  if (signed_vma)
    dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr);
  else
    dst->sh_addr = H_GET_WORD (abfd, src->sh_addr);
  dst->sh_offset = H_GET_WORD (abfd, src->sh_offset);
  dst->sh_size = H_GET_WORD (abfd, src->sh_size);
  /* PR 23657.  Check for invalid section size, in sections with contents.
     Note - we do not set an error value here because the contents
     of this particular section might not be needed by the consumer.  */
  if (dst->sh_type != SHT_NOBITS)
    {
      ufile_ptr filesize = bfd_get_file_size (abfd);

      if (filesize != 0 && dst->sh_size > filesize)
	_bfd_error_handler
	  (_("warning: %pB has a corrupt section with a size (%"
	     BFD_VMA_FMT "x) larger than the file size"),
	   abfd, dst->sh_size);
    }
  dst->sh_link = H_GET_32 (abfd, src->sh_link);
  dst->sh_info = H_GET_32 (abfd, src->sh_info);
  dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign);
  dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize);
  dst->bfd_section = NULL;
  dst->contents = NULL;
}

/* Translate an ELF section header table entry in internal format into an
   ELF section header table entry in external format.  */

static void
elf_swap_shdr_out (bfd *abfd,
		   const Elf_Internal_Shdr *src,
		   Elf_External_Shdr *dst)
{
  /* note that all elements of dst are *arrays of unsigned char* already...  */
  H_PUT_32 (abfd, src->sh_name, dst->sh_name);
  H_PUT_32 (abfd, src->sh_type, dst->sh_type);
  H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags);
  H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr);
  H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset);
  H_PUT_WORD (abfd, src->sh_size, dst->sh_size);
  H_PUT_32 (abfd, src->sh_link, dst->sh_link);
  H_PUT_32 (abfd, src->sh_info, dst->sh_info);
  H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign);
  H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize);
}

/* Translate an ELF program header table entry in external format into an
   ELF program header table entry in internal format.  */

void
elf_swap_phdr_in (bfd *abfd,
		  const Elf_External_Phdr *src,
		  Elf_Internal_Phdr *dst)
{
  int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;

  dst->p_type = H_GET_32 (abfd, src->p_type);
  dst->p_flags = H_GET_32 (abfd, src->p_flags);
  dst->p_offset = H_GET_WORD (abfd, src->p_offset);
  if (signed_vma)
    {
      dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr);
      dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr);
    }
  else
    {
      dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr);
      dst->p_paddr = H_GET_WORD (abfd, src->p_paddr);
    }
  dst->p_filesz = H_GET_WORD (abfd, src->p_filesz);
  dst->p_memsz = H_GET_WORD (abfd, src->p_memsz);
  dst->p_align = H_GET_WORD (abfd, src->p_align);
}

void
elf_swap_phdr_out (bfd *abfd,
		   const Elf_Internal_Phdr *src,
		   Elf_External_Phdr *dst)
{
  const struct elf_backend_data *bed;
  bfd_vma p_paddr;

  bed = get_elf_backend_data (abfd);
  p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr;

  /* note that all elements of dst are *arrays of unsigned char* already...  */
  H_PUT_32 (abfd, src->p_type, dst->p_type);
  H_PUT_WORD (abfd, src->p_offset, dst->p_offset);
  H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr);
  H_PUT_WORD (abfd, p_paddr, dst->p_paddr);
  H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz);
  H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz);
  H_PUT_32 (abfd, src->p_flags, dst->p_flags);
  H_PUT_WORD (abfd, src->p_align, dst->p_align);
}

/* Translate an ELF reloc from external format to internal format.  */
void
elf_swap_reloc_in (bfd *abfd,
		   const bfd_byte *s,
		   Elf_Internal_Rela *dst)
{
  const Elf_External_Rel *src = (const Elf_External_Rel *) s;
  dst->r_offset = H_GET_WORD (abfd, src->r_offset);
  dst->r_info = H_GET_WORD (abfd, src->r_info);
  dst->r_addend = 0;
}

void
elf_swap_reloca_in (bfd *abfd,
		    const bfd_byte *s,
		    Elf_Internal_Rela *dst)
{
  const Elf_External_Rela *src = (const Elf_External_Rela *) s;
  dst->r_offset = H_GET_WORD (abfd, src->r_offset);
  dst->r_info = H_GET_WORD (abfd, src->r_info);
  dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend);
}

/* Translate an ELF reloc from internal format to external format.  */
void
elf_swap_reloc_out (bfd *abfd,
		    const Elf_Internal_Rela *src,
		    bfd_byte *d)
{
  Elf_External_Rel *dst = (Elf_External_Rel *) d;
  H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
  H_PUT_WORD (abfd, src->r_info, dst->r_info);
}

void
elf_swap_reloca_out (bfd *abfd,
		     const Elf_Internal_Rela *src,
		     bfd_byte *d)
{
  Elf_External_Rela *dst = (Elf_External_Rela *) d;
  H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
  H_PUT_WORD (abfd, src->r_info, dst->r_info);
  H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend);
}

void
elf_swap_dyn_in (bfd *abfd,
		 const void *p,
		 Elf_Internal_Dyn *dst)
{
  const Elf_External_Dyn *src = (const Elf_External_Dyn *) p;

  dst->d_tag = H_GET_WORD (abfd, src->d_tag);
  dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val);
}

void
elf_swap_dyn_out (bfd *abfd,
		  const Elf_Internal_Dyn *src,
		  void *p)
{
  Elf_External_Dyn *dst = (Elf_External_Dyn *) p;

  H_PUT_WORD (abfd, src->d_tag, dst->d_tag);
  H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val);
}

/* ELF .o/exec file reading */

/* Begin processing a given object.

   First we validate the file by reading in the ELF header and checking
   the magic number.  */

static inline bfd_boolean
elf_file_p (Elf_External_Ehdr *x_ehdrp)
{
  return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0)
	  && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1)
	  && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2)
	  && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
}

/* Check to see if the file associated with ABFD matches the target vector
   that ABFD points to.

   Note that we may be called several times with the same ABFD, but different
   target vectors, most of which will not match.  We have to avoid leaving
   any side effects in ABFD, or any data it points to (like tdata), if the
   file does not match the target vector.  */

bfd_cleanup
elf_object_p (bfd *abfd)
{
  Elf_External_Ehdr x_ehdr;	/* Elf file header, external form */
  Elf_Internal_Ehdr *i_ehdrp;	/* Elf file header, internal form */
  Elf_External_Shdr x_shdr;	/* Section header table entry, external form */
  Elf_Internal_Shdr i_shdr;
  Elf_Internal_Shdr *i_shdrp;	/* Section header table, internal form */
  unsigned int shindex;
  const struct elf_backend_data *ebd;
  asection *s;
  const bfd_target *target;

  /* Read in the ELF header in external format.  */

  if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr))
    {
      if (bfd_get_error () != bfd_error_system_call)
	goto got_wrong_format_error;
      else
	goto got_no_match;
    }

  /* Now check to see if we have a valid ELF file, and one that BFD can
     make use of.  The magic number must match, the address size ('class')
     and byte-swapping must match our XVEC entry, and it must have a
     section header table (FIXME: See comments re sections at top of this
     file).  */

  if (! elf_file_p (&x_ehdr)
      || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
      || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
    goto got_wrong_format_error;

  /* Check that file's byte order matches xvec's */
  switch (x_ehdr.e_ident[EI_DATA])
    {
    case ELFDATA2MSB:		/* Big-endian */
      if (! bfd_header_big_endian (abfd))
	goto got_wrong_format_error;
      break;
    case ELFDATA2LSB:		/* Little-endian */
      if (! bfd_header_little_endian (abfd))
	goto got_wrong_format_error;
      break;
    case ELFDATANONE:		/* No data encoding specified */
    default:			/* Unknown data encoding specified */
      goto got_wrong_format_error;
    }

  target = abfd->xvec;

  /* Allocate an instance of the elf_obj_tdata structure and hook it up to
     the tdata pointer in the bfd.  */

  if (! (*target->_bfd_set_format[bfd_object]) (abfd))
    goto got_no_match;

  /* Now that we know the byte order, swap in the rest of the header */
  i_ehdrp = elf_elfheader (abfd);
  elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
#if DEBUG & 1
  elf_debug_file (i_ehdrp);
#endif

  /* Reject ET_CORE (header indicates core file, not object file) */
  if (i_ehdrp->e_type == ET_CORE)
    goto got_wrong_format_error;

  /* If this is a relocatable file and there is no section header
     table, then we're hosed.  */
  if (i_ehdrp->e_shoff < sizeof (x_ehdr) && i_ehdrp->e_type == ET_REL)
    goto got_wrong_format_error;

  /* As a simple sanity check, verify that what BFD thinks is the
     size of each section header table entry actually matches the size
     recorded in the file, but only if there are any sections.  */
  if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0)
    goto got_wrong_format_error;

  /* Further sanity check.  */
  if (i_ehdrp->e_shoff < sizeof (x_ehdr) && i_ehdrp->e_shnum != 0)
    goto got_wrong_format_error;

  ebd = get_elf_backend_data (abfd);
  if (ebd->s->arch_size != ARCH_SIZE)
    goto got_wrong_format_error;

  /* Check that the ELF e_machine field matches what this particular
     BFD format expects.  */
  if (ebd->elf_machine_code != i_ehdrp->e_machine
      && (ebd->elf_machine_alt1 == 0
	  || i_ehdrp->e_machine != ebd->elf_machine_alt1)
      && (ebd->elf_machine_alt2 == 0
	  || i_ehdrp->e_machine != ebd->elf_machine_alt2)
      && ebd->elf_machine_code != EM_NONE)
    goto got_wrong_format_error;

  if (i_ehdrp->e_type == ET_EXEC)
    abfd->flags |= EXEC_P;
  else if (i_ehdrp->e_type == ET_DYN)
    abfd->flags |= DYNAMIC;

  if (i_ehdrp->e_phnum > 0)
    abfd->flags |= D_PAGED;

  if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
    {
      /* It's OK if this fails for the generic target.  */
      if (ebd->elf_machine_code != EM_NONE)
	goto got_no_match;
    }

  if (ebd->elf_machine_code != EM_NONE
      && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi
      && ebd->elf_osabi != ELFOSABI_NONE)
    goto got_wrong_format_error;

  if (i_ehdrp->e_shoff >= sizeof (x_ehdr))
    {
      file_ptr where = (file_ptr) i_ehdrp->e_shoff;

      /* Seek to the section header table in the file.  */
      if (bfd_seek (abfd, where, SEEK_SET) != 0)
	goto got_no_match;

      /* Read the first section header at index 0, and convert to internal
	 form.  */
      if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
	goto got_no_match;
      elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);

      /* If the section count is zero, the actual count is in the first
	 section header.  */
      if (i_ehdrp->e_shnum == SHN_UNDEF)
	{
	  i_ehdrp->e_shnum = i_shdr.sh_size;
	  if (i_ehdrp->e_shnum >= SHN_LORESERVE
	      || i_ehdrp->e_shnum != i_shdr.sh_size
	      || i_ehdrp->e_shnum  == 0)
	    goto got_wrong_format_error;
	}

      /* And similarly for the string table index.  */
      if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff))
	{
	  i_ehdrp->e_shstrndx = i_shdr.sh_link;
	  if (i_ehdrp->e_shstrndx != i_shdr.sh_link)
	    goto got_wrong_format_error;
	}

      /* And program headers.  */
      if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0)
	{
	  i_ehdrp->e_phnum = i_shdr.sh_info;
	  if (i_ehdrp->e_phnum != i_shdr.sh_info)
	    goto got_wrong_format_error;
	}

      /* Sanity check that we can read all of the section headers.
	 It ought to be good enough to just read the last one.  */
      if (i_ehdrp->e_shnum != 1)
	{
	  /* Check that we don't have a totally silly number of sections.  */
	  if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr)
	      || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr))
	    goto got_wrong_format_error;

	  where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr);
	  if ((bfd_size_type) where <= i_ehdrp->e_shoff)
	    goto got_wrong_format_error;

	  if (bfd_seek (abfd, where, SEEK_SET) != 0)
	    goto got_no_match;
	  if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
	    goto got_no_match;

	  /* Back to where we were.  */
	  where = i_ehdrp->e_shoff + sizeof (x_shdr);
	  if (bfd_seek (abfd, where, SEEK_SET) != 0)
	    goto got_no_match;
	}
    }

  /* Allocate space for a copy of the section header table in
     internal form.  */
  if (i_ehdrp->e_shnum != 0)
    {
      Elf_Internal_Shdr *shdrp;
      unsigned int num_sec;
      size_t amt;

      if (_bfd_mul_overflow (i_ehdrp->e_shnum, sizeof (*i_shdrp), &amt))
	goto got_wrong_format_error;
      i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
      if (!i_shdrp)
	goto got_no_match;
      num_sec = i_ehdrp->e_shnum;
      elf_numsections (abfd) = num_sec;
      if (_bfd_mul_overflow (num_sec, sizeof (i_shdrp), &amt))
	goto got_wrong_format_error;
      elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
      if (!elf_elfsections (abfd))
	goto got_no_match;

      memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp));
      for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++)
	elf_elfsections (abfd)[shindex] = shdrp++;

      /* Read in the rest of the section header table and convert it
	 to internal form.  */
      for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
	{
	  if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
	    goto got_no_match;
	  elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);

	  /* Sanity check sh_link and sh_info.  */
	  if (i_shdrp[shindex].sh_link >= num_sec)
	    {
	      /* PR 10478: Accept Solaris binaries with a sh_link
		 field set to SHN_BEFORE or SHN_AFTER.  */
	      switch (ebd->elf_machine_code)
		{
		case EM_386:
		case EM_IAMCU:
		case EM_X86_64:
		case EM_OLD_SPARCV9:
		case EM_SPARC32PLUS:
		case EM_SPARCV9:
		case EM_SPARC:
		  if (i_shdrp[shindex].sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
		      || i_shdrp[shindex].sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
		    break;
		  /* Otherwise fall through.  */
		default:
		  goto got_wrong_format_error;
		}
	    }

	  if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK)
	       || i_shdrp[shindex].sh_type == SHT_RELA
	       || i_shdrp[shindex].sh_type == SHT_REL)
	      && i_shdrp[shindex].sh_info >= num_sec)
	    goto got_wrong_format_error;

	  /* If the section is loaded, but not page aligned, clear
	     D_PAGED.  */
	  if (i_shdrp[shindex].sh_size != 0
	      && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0
	      && i_shdrp[shindex].sh_type != SHT_NOBITS
	      && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset)
		   % ebd->minpagesize)
		  != 0))
	    abfd->flags &= ~D_PAGED;
	}

      if (i_ehdrp->e_shstrndx >= elf_numsections (abfd)
	  || i_shdrp[i_ehdrp->e_shstrndx].sh_type != SHT_STRTAB)
	{
	  /* PR 2257:
	     We used to just goto got_wrong_format_error here
	     but there are binaries in existance for which this test
	     will prevent the binutils from working with them at all.
	     So we are kind, and reset the string index value to 0
	     so that at least some processing can be done.  */
	  i_ehdrp->e_shstrndx = SHN_UNDEF;
	  _bfd_error_handler
	    (_("warning: %pB has a corrupt string table index - ignoring"),
	     abfd);
	}
    }
  else if (i_ehdrp->e_shstrndx != SHN_UNDEF)
    goto got_wrong_format_error;

  /* Read in the program headers.  */
  if (i_ehdrp->e_phnum == 0)
    elf_tdata (abfd)->phdr = NULL;
  else
    {
      Elf_Internal_Phdr *i_phdr;
      unsigned int i;
      ufile_ptr filesize;
      size_t amt;

      /* Check for a corrupt input file with an impossibly large number
	 of program headers.  */
      filesize = bfd_get_file_size (abfd);
      if (filesize != 0
	  && i_ehdrp->e_phnum > filesize / sizeof (Elf_External_Phdr))
	goto got_wrong_format_error;
      if (_bfd_mul_overflow (i_ehdrp->e_phnum, sizeof (*i_phdr), &amt))
	goto got_wrong_format_error;
      elf_tdata (abfd)->phdr
	= (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
      if (elf_tdata (abfd)->phdr == NULL)
	goto got_no_match;
      if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
	goto got_no_match;
      i_phdr = elf_tdata (abfd)->phdr;
      for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++)
	{
	  Elf_External_Phdr x_phdr;

	  if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr)
	    goto got_no_match;
	  elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
	}
    }

  if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff >= sizeof (x_ehdr))
    {
      unsigned int num_sec;

      /* Once all of the section headers have been read and converted, we
	 can start processing them.  Note that the first section header is
	 a dummy placeholder entry, so we ignore it.  */
      num_sec = elf_numsections (abfd);
      for (shindex = 1; shindex < num_sec; shindex++)
	if (!bfd_section_from_shdr (abfd, shindex))
	  goto got_no_match;

      /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER.  */
      if (! _bfd_elf_setup_sections (abfd))
	goto got_wrong_format_error;
    }

  /* Let the backend double check the format and override global
     information.  */
  if (ebd->elf_backend_object_p)
    {
      if (! (*ebd->elf_backend_object_p) (abfd))
	goto got_wrong_format_error;
    }

  /* Remember the entry point specified in the ELF file header.  */
  bfd_set_start_address (abfd, i_ehdrp->e_entry);

  /* If we have created any reloc sections that are associated with
     debugging sections, mark the reloc sections as debugging as well.  */
  for (s = abfd->sections; s != NULL; s = s->next)
    {
      if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL
	   || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)
	  && elf_section_data (s)->this_hdr.sh_info > 0)
	{
	  unsigned long targ_index;
	  asection *targ_sec;

	  targ_index = elf_section_data (s)->this_hdr.sh_info;
	  targ_sec = bfd_section_from_elf_index (abfd, targ_index);
	  if (targ_sec != NULL
	      && (targ_sec->flags & SEC_DEBUGGING) != 0)
	    s->flags |= SEC_DEBUGGING;
	}
    }
  return _bfd_no_cleanup;

 got_wrong_format_error:
  bfd_set_error (bfd_error_wrong_format);

 got_no_match:
  return NULL;
}

/* ELF .o/exec file writing */

/* Write out the relocs.  */

void
elf_write_relocs (bfd *abfd, asection *sec, void *data)
{
  const struct elf_backend_data * const bed = get_elf_backend_data (abfd);
  bfd_boolean *failedp = (bfd_boolean *) data;
  Elf_Internal_Shdr *rela_hdr;
  bfd_vma addr_offset;
  void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
  size_t extsize;
  bfd_byte *dst_rela;
  unsigned int idx;
  asymbol *last_sym;
  int last_sym_idx;
  size_t amt;

  /* If we have already failed, don't do anything.  */
  if (*failedp)
    return;

  if ((sec->flags & SEC_RELOC) == 0)
    return;

  /* The linker backend writes the relocs out itself, and sets the
     reloc_count field to zero to inhibit writing them here.  Also,
     sometimes the SEC_RELOC flag gets set even when there aren't any
     relocs.  */
  if (sec->reloc_count == 0)
    return;

  /* If we have opened an existing file for update, reloc_count may be
     set even though we are not linking.  In that case we have nothing
     to do.  */
  if (sec->orelocation == NULL)
    return;

  rela_hdr = elf_section_data (sec)->rela.hdr;
  if (rela_hdr == NULL)
    rela_hdr = elf_section_data (sec)->rel.hdr;

  rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
  if (_bfd_mul_overflow (sec->reloc_count, rela_hdr->sh_entsize, &amt)
      || (rela_hdr->contents = bfd_alloc (abfd, amt)) == NULL)
    {
      bfd_set_error (bfd_error_no_memory);
      *failedp = TRUE;
      return;
    }

  /* Figure out whether the relocations are RELA or REL relocations.  */
  if (rela_hdr->sh_type == SHT_RELA)
    {
      swap_out = elf_swap_reloca_out;
      extsize = sizeof (Elf_External_Rela);
    }
  else if (rela_hdr->sh_type == SHT_REL)
    {
      swap_out = elf_swap_reloc_out;
      extsize = sizeof (Elf_External_Rel);
    }
  else
    /* Every relocation section should be either an SHT_RELA or an
       SHT_REL section.  */
    abort ();

  /* The address of an ELF reloc is section relative for an object
     file, and absolute for an executable file or shared library.
     The address of a BFD reloc is always section relative.  */
  addr_offset = 0;
  if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
    addr_offset = sec->vma;

  /* orelocation has the data, reloc_count has the count...  */
  last_sym = 0;
  last_sym_idx = 0;
  dst_rela = rela_hdr->contents;

  for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize)
    {
      Elf_Internal_Rela src_rela;
      arelent *ptr;
      asymbol *sym;
      int n;

      ptr = sec->orelocation[idx];
      sym = *ptr->sym_ptr_ptr;
      if (sym == last_sym)
	n = last_sym_idx;
      else if (bfd_is_abs_section (sym->section) && sym->value == 0)
	n = STN_UNDEF;
      else
	{
	  last_sym = sym;
	  n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
	  if (n < 0)
	    {
	      *failedp = TRUE;
	      return;
	    }
	  last_sym_idx = n;
	}

      if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
	  && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
	  && ! _bfd_elf_validate_reloc (abfd, ptr))
	{
	  *failedp = TRUE;
	  return;
	}

      if (ptr->howto == NULL)
	{
	  *failedp = TRUE;
	  return;
	}

      src_rela.r_offset = ptr->address + addr_offset;
      src_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
      src_rela.r_addend = ptr->addend;
      (*swap_out) (abfd, &src_rela, dst_rela);
    }

  if (elf_section_data (sec)->has_secondary_relocs
      && !bed->write_secondary_relocs (abfd, sec))
    {
      *failedp = TRUE;
      return;
    }
}

/* Write out the program headers.  */

int
elf_write_out_phdrs (bfd *abfd,
		     const Elf_Internal_Phdr *phdr,
		     unsigned int count)
{
  while (count--)
    {
      Elf_External_Phdr extphdr;

      elf_swap_phdr_out (abfd, phdr, &extphdr);
      if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd)
	  != sizeof (Elf_External_Phdr))
	return -1;
      phdr++;
    }
  return 0;
}

/* Write out the section headers and the ELF file header.  */

bfd_boolean
elf_write_shdrs_and_ehdr (bfd *abfd)
{
  Elf_External_Ehdr x_ehdr;	/* Elf file header, external form */
  Elf_Internal_Ehdr *i_ehdrp;	/* Elf file header, internal form */
  Elf_External_Shdr *x_shdrp;	/* Section header table, external form */
  Elf_Internal_Shdr **i_shdrp;	/* Section header table, internal form */
  unsigned int count;
  size_t amt;

  i_ehdrp = elf_elfheader (abfd);
  i_shdrp = elf_elfsections (abfd);

  /* swap the header before spitting it out...  */

#if DEBUG & 1
  elf_debug_file (i_ehdrp);
#endif
  elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
  amt = sizeof (x_ehdr);
  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
      || bfd_bwrite (&x_ehdr, amt, abfd) != amt)
    return FALSE;

  /* Some fields in the first section header handle overflow of ehdr
     fields.  */
  if (i_ehdrp->e_phnum >= PN_XNUM)
    i_shdrp[0]->sh_info = i_ehdrp->e_phnum;
  if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff))
    i_shdrp[0]->sh_size = i_ehdrp->e_shnum;
  if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff))
    i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx;

  /* at this point we've concocted all the ELF sections...  */
  if (_bfd_mul_overflow (i_ehdrp->e_shnum, sizeof (*x_shdrp), &amt))
    {
      bfd_set_error (bfd_error_no_memory);
      return FALSE;
    }
  x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt);
  if (!x_shdrp)
    return FALSE;

  for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++)
    {
#if DEBUG & 2
      elf_debug_section (count, *i_shdrp);
#endif
      elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count);
    }
  amt = (bfd_size_type) i_ehdrp->e_shnum * sizeof (*x_shdrp);
  if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
      || bfd_bwrite (x_shdrp, amt, abfd) != amt)
    return FALSE;

  /* need to dump the string table too...  */

  return TRUE;
}

bfd_boolean
elf_checksum_contents (bfd *abfd,
		       void (*process) (const void *, size_t, void *),
		       void *arg)
{
  Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
  Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
  Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr;
  unsigned int count, num;

  {
    Elf_External_Ehdr x_ehdr;
    Elf_Internal_Ehdr i_ehdr;

    i_ehdr = *i_ehdrp;
    i_ehdr.e_phoff = i_ehdr.e_shoff = 0;
    elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr);
    (*process) (&x_ehdr, sizeof x_ehdr, arg);
  }

  num = i_ehdrp->e_phnum;
  for (count = 0; count < num; count++)
    {
      Elf_External_Phdr x_phdr;
      elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr);
      (*process) (&x_phdr, sizeof x_phdr, arg);
    }

  num = elf_numsections (abfd);
  for (count = 0; count < num; count++)
    {
      Elf_Internal_Shdr i_shdr;
      Elf_External_Shdr x_shdr;
      bfd_byte *contents, *free_contents;

      i_shdr = *i_shdrp[count];
      i_shdr.sh_offset = 0;

      elf_swap_shdr_out (abfd, &i_shdr, &x_shdr);
      (*process) (&x_shdr, sizeof x_shdr, arg);

      /* Process the section's contents, if it has some.
	 PR ld/12451: Read them in if necessary.  */
      if (i_shdr.sh_type == SHT_NOBITS)
	continue;
      free_contents = NULL;
      contents = i_shdr.contents;
      if (contents == NULL)
	{
	  asection *sec;

	  sec = bfd_section_from_elf_index (abfd, count);
	  if (sec != NULL)
	    {
	      contents = sec->contents;
	      if (contents == NULL)
		{
		  /* Force rereading from file.  */
		  sec->flags &= ~SEC_IN_MEMORY;
		  if (!bfd_malloc_and_get_section (abfd, sec, &free_contents))
		    continue;
		  contents = free_contents;
		}
	    }
	}
      if (contents != NULL)
	{
	  (*process) (contents, i_shdr.sh_size, arg);
	  free (free_contents);
	}
    }

  return TRUE;
}

long
elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic)
{
  Elf_Internal_Shdr *hdr;
  Elf_Internal_Shdr *verhdr;
  unsigned long symcount;	/* Number of external ELF symbols */
  elf_symbol_type *sym;		/* Pointer to current bfd symbol */
  elf_symbol_type *symbase;	/* Buffer for generated bfd symbols */
  Elf_Internal_Sym *isym;
  Elf_Internal_Sym *isymend;
  Elf_Internal_Sym *isymbuf = NULL;
  Elf_External_Versym *xver;
  Elf_External_Versym *xverbuf = NULL;
  const struct elf_backend_data *ebd;
  size_t amt;

  /* Read each raw ELF symbol, converting from external ELF form to
     internal ELF form, and then using the information to create a
     canonical bfd symbol table entry.

     Note that we allocate the initial bfd canonical symbol buffer
     based on a one-to-one mapping of the ELF symbols to canonical
     symbols.  We actually use all the ELF symbols, so there will be no
     space left over at the end.  When we have all the symbols, we
     build the caller's pointer vector.  */

  if (! dynamic)
    {
      hdr = &elf_tdata (abfd)->symtab_hdr;
      verhdr = NULL;
    }
  else
    {
      hdr = &elf_tdata (abfd)->dynsymtab_hdr;
      if (elf_dynversym (abfd) == 0)
	verhdr = NULL;
      else
	verhdr = &elf_tdata (abfd)->dynversym_hdr;
      if ((elf_dynverdef (abfd) != 0
	   && elf_tdata (abfd)->verdef == NULL)
	  || (elf_dynverref (abfd) != 0
	      && elf_tdata (abfd)->verref == NULL))
	{
	  if (!_bfd_elf_slurp_version_tables (abfd, FALSE))
	    return -1;
	}
    }

  ebd = get_elf_backend_data (abfd);
  symcount = hdr->sh_size / sizeof (Elf_External_Sym);
  if (symcount == 0)
    sym = symbase = NULL;
  else
    {
      isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0,
				      NULL, NULL, NULL);
      if (isymbuf == NULL)
	return -1;

      if (_bfd_mul_overflow (symcount, sizeof (elf_symbol_type), &amt))
	{
	  bfd_set_error (bfd_error_file_too_big);
	  goto error_return;
	}
      symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt);
      if (symbase == (elf_symbol_type *) NULL)
	goto error_return;

      /* Read the raw ELF version symbol information.  */
      if (verhdr != NULL
	  && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount)
	{
	  _bfd_error_handler
	    /* xgettext:c-format */
	    (_("%pB: version count (%" PRId64 ")"
	       " does not match symbol count (%ld)"),
	     abfd,
	     (int64_t) (verhdr->sh_size / sizeof (Elf_External_Versym)),
	     symcount);

	  /* Slurp in the symbols without the version information,
	     since that is more helpful than just quitting.  */
	  verhdr = NULL;
	}

      if (verhdr != NULL)
	{
	  if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0)
	    goto error_return;
	  xverbuf = (Elf_External_Versym *)
	    _bfd_malloc_and_read (abfd, verhdr->sh_size, verhdr->sh_size);
	  if (xverbuf == NULL && verhdr->sh_size != 0)
	    goto error_return;
	}

      /* Skip first symbol, which is a null dummy.  */
      xver = xverbuf;
      if (xver != NULL)
	++xver;
      isymend = isymbuf + symcount;
      for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++)
	{
	  memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym));

	  sym->symbol.the_bfd = abfd;
	  sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL);
	  sym->symbol.value = isym->st_value;

	  if (isym->st_shndx == SHN_UNDEF)
	    {
	      sym->symbol.section = bfd_und_section_ptr;
	    }
	  else if (isym->st_shndx == SHN_ABS)
	    {
	      sym->symbol.section = bfd_abs_section_ptr;
	    }
	  else if (isym->st_shndx == SHN_COMMON)
	    {
	      sym->symbol.section = bfd_com_section_ptr;
	      if ((abfd->flags & BFD_PLUGIN) != 0)
		{
		  asection *xc = bfd_get_section_by_name (abfd, "COMMON");

		  if (xc == NULL)
		    {
		      flagword flags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP
					| SEC_EXCLUDE);
		      xc = bfd_make_section_with_flags (abfd, "COMMON", flags);
		      if (xc == NULL)
			goto error_return;
		    }
		  sym->symbol.section = xc;
		}
	      /* Elf puts the alignment into the `value' field, and
		 the size into the `size' field.  BFD wants to see the
		 size in the value field, and doesn't care (at the
		 moment) about the alignment.  */
	      sym->symbol.value = isym->st_size;
	    }
	  else
	    {
	      sym->symbol.section
		= bfd_section_from_elf_index (abfd, isym->st_shndx);
	      if (sym->symbol.section == NULL)
		{
		  /* This symbol is in a section for which we did not
		     create a BFD section.  Just use bfd_abs_section,
		     although it is wrong.  FIXME.  Note - there is
		     code in elf.c:swap_out_syms that calls
		     symbol_section_index() in the elf backend for
		     cases like this.  */
		  sym->symbol.section = bfd_abs_section_ptr;
		}
	    }

	  /* If this is a relocatable file, then the symbol value is
	     already section relative.  */
	  if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
	    sym->symbol.value -= sym->symbol.section->vma;

	  switch (ELF_ST_BIND (isym->st_info))
	    {
	    case STB_LOCAL:
	      sym->symbol.flags |= BSF_LOCAL;
	      break;
	    case STB_GLOBAL:
	      if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON)
		sym->symbol.flags |= BSF_GLOBAL;
	      break;
	    case STB_WEAK:
	      sym->symbol.flags |= BSF_WEAK;
	      break;
	    case STB_GNU_UNIQUE:
	      sym->symbol.flags |= BSF_GNU_UNIQUE;
	      break;
	    }

	  switch (ELF_ST_TYPE (isym->st_info))
	    {
	    case STT_SECTION:
	      sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
	      break;
	    case STT_FILE:
	      sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
	      break;
	    case STT_FUNC:
	      sym->symbol.flags |= BSF_FUNCTION;
	      break;
	    case STT_COMMON:
	      /* FIXME: Do we have to put the size field into the value field
		 as we do with symbols in SHN_COMMON sections (see above) ?  */
	      sym->symbol.flags |= BSF_ELF_COMMON;
	      /* Fall through.  */
	    case STT_OBJECT:
	      sym->symbol.flags |= BSF_OBJECT;
	      break;
	    case STT_TLS:
	      sym->symbol.flags |= BSF_THREAD_LOCAL;
	      break;
	    case STT_RELC:
	      sym->symbol.flags |= BSF_RELC;
	      break;
	    case STT_SRELC:
	      sym->symbol.flags |= BSF_SRELC;
	      break;
	    case STT_GNU_IFUNC:
	      sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION;
	      break;
	    }

	  if (dynamic)
	    sym->symbol.flags |= BSF_DYNAMIC;

	  if (xver != NULL)
	    {
	      Elf_Internal_Versym iversym;

	      _bfd_elf_swap_versym_in (abfd, xver, &iversym);
	      sym->version = iversym.vs_vers;
	      xver++;
	    }

	  /* Do some backend-specific processing on this symbol.  */
	  if (ebd->elf_backend_symbol_processing)
	    (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
	}
    }

  /* Do some backend-specific processing on this symbol table.  */
  if (ebd->elf_backend_symbol_table_processing)
    (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);

  /* We rely on the zalloc to clear out the final symbol entry.  */

  symcount = sym - symbase;

  /* Fill in the user's symbol pointer vector if needed.  */
  if (symptrs)
    {
      long l = symcount;

      sym = symbase;
      while (l-- > 0)
	{
	  *symptrs++ = &sym->symbol;
	  sym++;
	}
      *symptrs = 0;		/* Final null pointer */
    }

  free (xverbuf);
  if (hdr->contents != (unsigned char *) isymbuf)
    free (isymbuf);
  return symcount;

 error_return:
  free (xverbuf);
  if (hdr->contents != (unsigned char *) isymbuf)
    free (isymbuf);
  return -1;
}

/* Read relocations for ASECT from REL_HDR.  There are RELOC_COUNT of
   them.  */

static bfd_boolean
elf_slurp_reloc_table_from_section (bfd *abfd,
				    asection *asect,
				    Elf_Internal_Shdr *rel_hdr,
				    bfd_size_type reloc_count,
				    arelent *relents,
				    asymbol **symbols,
				    bfd_boolean dynamic)
{
  const struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
  void *allocated = NULL;
  bfd_byte *native_relocs;
  arelent *relent;
  unsigned int i;
  int entsize;
  unsigned int symcount;

  if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0)
    return FALSE;
  allocated = _bfd_malloc_and_read (abfd, rel_hdr->sh_size, rel_hdr->sh_size);
  if (allocated == NULL)
    return FALSE;

  native_relocs = (bfd_byte *) allocated;

  entsize = rel_hdr->sh_entsize;
  BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
	      || entsize == sizeof (Elf_External_Rela));

  if (dynamic)
    symcount = bfd_get_dynamic_symcount (abfd);
  else
    symcount = bfd_get_symcount (abfd);

  for (i = 0, relent = relents;
       i < reloc_count;
       i++, relent++, native_relocs += entsize)
    {
      bfd_boolean res;
      Elf_Internal_Rela rela;

      if (entsize == sizeof (Elf_External_Rela))
	elf_swap_reloca_in (abfd, native_relocs, &rela);
      else
	elf_swap_reloc_in (abfd, native_relocs, &rela);

      /* The address of an ELF reloc is section relative for an object
	 file, and absolute for an executable file or shared library.
	 The address of a normal BFD reloc is always section relative,
	 and the address of a dynamic reloc is absolute..  */
      if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
	relent->address = rela.r_offset;
      else
	relent->address = rela.r_offset - asect->vma;

      if (ELF_R_SYM (rela.r_info) == STN_UNDEF)
	/* FIXME: This and the error case below mean that we have a
	   symbol on relocs that is not elf_symbol_type.  */
	relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
      else if (ELF_R_SYM (rela.r_info) > symcount)
	{
	  _bfd_error_handler
	    /* xgettext:c-format */
	    (_("%pB(%pA): relocation %d has invalid symbol index %ld"),
	     abfd, asect, i, (long) ELF_R_SYM (rela.r_info));
	  bfd_set_error (bfd_error_bad_value);
	  relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
	}
      else
	{
	  asymbol **ps;

	  ps = symbols + ELF_R_SYM (rela.r_info) - 1;

	  relent->sym_ptr_ptr = ps;
	}

      relent->addend = rela.r_addend;

      if ((entsize == sizeof (Elf_External_Rela)
	   && ebd->elf_info_to_howto != NULL)
	  || ebd->elf_info_to_howto_rel == NULL)
	res = ebd->elf_info_to_howto (abfd, relent, &rela);
      else
	res = ebd->elf_info_to_howto_rel (abfd, relent, &rela);

      if (! res || relent->howto == NULL)
	goto error_return;
    }

  free (allocated);
  return TRUE;

 error_return:
  free (allocated);
  return FALSE;
}

/* Read in and swap the external relocs.  */

bfd_boolean
elf_slurp_reloc_table (bfd *abfd,
		       asection *asect,
		       asymbol **symbols,
		       bfd_boolean dynamic)
{
  const struct elf_backend_data * const bed = get_elf_backend_data (abfd);
  struct bfd_elf_section_data * const d = elf_section_data (asect);
  Elf_Internal_Shdr *rel_hdr;
  Elf_Internal_Shdr *rel_hdr2;
  bfd_size_type reloc_count;
  bfd_size_type reloc_count2;
  arelent *relents;
  size_t amt;

  if (asect->relocation != NULL)
    return TRUE;

  if (! dynamic)
    {
      if ((asect->flags & SEC_RELOC) == 0
	  || asect->reloc_count == 0)
	return TRUE;

      rel_hdr = d->rel.hdr;
      reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0;
      rel_hdr2 = d->rela.hdr;
      reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0;

      /* PR 17512: file: 0b4f81b7.  */
      if (asect->reloc_count != reloc_count + reloc_count2)
	return FALSE;
      BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset)
		  || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));

    }
  else
    {
      /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
	 case because relocations against this section may use the
	 dynamic symbol table, and in that case bfd_section_from_shdr
	 in elf.c does not update the RELOC_COUNT.  */
      if (asect->size == 0)
	return TRUE;

      rel_hdr = &d->this_hdr;
      reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
      rel_hdr2 = NULL;
      reloc_count2 = 0;
    }

  if (_bfd_mul_overflow (reloc_count + reloc_count2, sizeof (arelent), &amt))
    {
      bfd_set_error (bfd_error_file_too_big);
      return FALSE;
    }
  relents = (arelent *) bfd_alloc (abfd, amt);
  if (relents == NULL)
    return FALSE;

  if (rel_hdr
      && !elf_slurp_reloc_table_from_section (abfd, asect,
					      rel_hdr, reloc_count,
					      relents,
					      symbols, dynamic))
    return FALSE;

  if (rel_hdr2
      && !elf_slurp_reloc_table_from_section (abfd, asect,
					      rel_hdr2, reloc_count2,
					      relents + reloc_count,
					      symbols, dynamic))
    return FALSE;

  if (!bed->slurp_secondary_relocs (abfd, asect, symbols))
    return FALSE;

  asect->relocation = relents;
  return TRUE;
}

#if DEBUG & 2
static void
elf_debug_section (int num, Elf_Internal_Shdr *hdr)
{
  fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
	   hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
	   (long) hdr);
  fprintf (stderr,
	   "sh_name      = %ld\tsh_type      = %ld\tsh_flags     = %ld\n",
	   (long) hdr->sh_name,
	   (long) hdr->sh_type,
	   (long) hdr->sh_flags);
  fprintf (stderr,
	   "sh_addr      = %ld\tsh_offset    = %ld\tsh_size      = %ld\n",
	   (long) hdr->sh_addr,
	   (long) hdr->sh_offset,
	   (long) hdr->sh_size);
  fprintf (stderr,
	   "sh_link      = %ld\tsh_info      = %ld\tsh_addralign = %ld\n",
	   (long) hdr->sh_link,
	   (long) hdr->sh_info,
	   (long) hdr->sh_addralign);
  fprintf (stderr, "sh_entsize   = %ld\n",
	   (long) hdr->sh_entsize);
  fflush (stderr);
}
#endif

#if DEBUG & 1
static void
elf_debug_file (Elf_Internal_Ehdr *ehdrp)
{
  fprintf (stderr, "e_entry      = 0x%.8lx\n", (long) ehdrp->e_entry);
  fprintf (stderr, "e_phoff      = %ld\n", (long) ehdrp->e_phoff);
  fprintf (stderr, "e_phnum      = %ld\n", (long) ehdrp->e_phnum);
  fprintf (stderr, "e_phentsize  = %ld\n", (long) ehdrp->e_phentsize);
  fprintf (stderr, "e_shoff      = %ld\n", (long) ehdrp->e_shoff);
  fprintf (stderr, "e_shnum      = %ld\n", (long) ehdrp->e_shnum);
  fprintf (stderr, "e_shentsize  = %ld\n", (long) ehdrp->e_shentsize);
}
#endif

/* Create a new BFD as if by bfd_openr.  Rather than opening a file,
   reconstruct an ELF file by reading the segments out of remote
   memory based on the ELF file header at EHDR_VMA and the ELF program
   headers it points to.  If non-zero, SIZE is the known extent of the
   object.  If not null, *LOADBASEP is filled in with the difference
   between the VMAs from which the segments were read, and the VMAs
   the file headers (and hence BFD's idea of each section's VMA) put
   them at.

   The function TARGET_READ_MEMORY is called to copy LEN bytes from
   the remote memory at target address VMA into the local buffer at
   MYADDR; it should return zero on success or an `errno' code on
   failure.  TEMPL must be a BFD for a target with the word size and
   byte order found in the remote memory.  */

bfd *
NAME(_bfd_elf,bfd_from_remote_memory)
  (bfd *templ,
   bfd_vma ehdr_vma    /* Bytes.  */,
   bfd_size_type size  /* Octets.  */,
   bfd_vma *loadbasep  /* Bytes.  */,
   int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
                          /* (Bytes  ,           , octets       ).  */
{
  Elf_External_Ehdr x_ehdr;	/* Elf file header, external form */
  Elf_Internal_Ehdr i_ehdr;	/* Elf file header, internal form */
  Elf_External_Phdr *x_phdrs;
  Elf_Internal_Phdr *i_phdrs, *last_phdr, *first_phdr;
  bfd *nbfd;
  struct bfd_in_memory *bim;
  bfd_byte *contents;
  int err;
  unsigned int i;
  bfd_vma high_offset;
  bfd_vma shdr_end;
  bfd_vma loadbase;  /* Bytes.  */
  size_t amt;
  unsigned int opb = bfd_octets_per_byte (templ, NULL);

  /* Read in the ELF header in external format.  */
  err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr);
  if (err)
    {
      bfd_set_error (bfd_error_system_call);
      errno = err;
      return NULL;
    }

  /* Now check to see if we have a valid ELF file, and one that BFD can
     make use of.  The magic number must match, the address size ('class')
     and byte-swapping must match our XVEC entry.  */

  if (! elf_file_p (&x_ehdr)
      || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
      || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* Check that file's byte order matches xvec's */
  switch (x_ehdr.e_ident[EI_DATA])
    {
    case ELFDATA2MSB:		/* Big-endian */
      if (! bfd_header_big_endian (templ))
	{
	  bfd_set_error (bfd_error_wrong_format);
	  return NULL;
	}
      break;
    case ELFDATA2LSB:		/* Little-endian */
      if (! bfd_header_little_endian (templ))
	{
	  bfd_set_error (bfd_error_wrong_format);
	  return NULL;
	}
      break;
    case ELFDATANONE:		/* No data encoding specified */
    default:			/* Unknown data encoding specified */
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr);

  /* The file header tells where to find the program headers.
     These are what we use to actually choose what to read.  */

  if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (_bfd_mul_overflow (i_ehdr.e_phnum,
			 sizeof (*x_phdrs) + sizeof (*i_phdrs), &amt))
    {
      bfd_set_error (bfd_error_file_too_big);
      return NULL;
    }
  x_phdrs = (Elf_External_Phdr *) bfd_malloc (amt);
  if (x_phdrs == NULL)
    return NULL;
  err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs,
			    i_ehdr.e_phnum * sizeof x_phdrs[0]);
  if (err)
    {
      free (x_phdrs);
      bfd_set_error (bfd_error_system_call);
      errno = err;
      return NULL;
    }
  i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum];

  high_offset = 0;
  loadbase = 0;
  first_phdr = NULL;
  last_phdr = NULL;
  for (i = 0; i < i_ehdr.e_phnum; ++i)
    {
      elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]);
      if (i_phdrs[i].p_type == PT_LOAD)
	{
	  bfd_vma segment_end = i_phdrs[i].p_offset + i_phdrs[i].p_filesz;

	  if (segment_end > high_offset)
	    {
	      high_offset = segment_end;
	      last_phdr = &i_phdrs[i];
	    }

	  /* If this program header covers offset zero, where the file
	     header sits, then we can figure out the loadbase.  */
	  if (first_phdr == NULL)
	    {
	      bfd_vma p_offset = i_phdrs[i].p_offset;  /* Octets.  */
	      bfd_vma p_vaddr = i_phdrs[i].p_vaddr;    /* Octets.  */

	      if (i_phdrs[i].p_align > 1)
		{
		  p_offset &= -(i_phdrs[i].p_align * opb);
		  p_vaddr &= -(i_phdrs[i].p_align * opb);
		}
	      if (p_offset == 0)
		{
		  loadbase = ehdr_vma - p_vaddr / opb;
		  first_phdr = &i_phdrs[i];
		}
	    }
	}
    }
  if (high_offset == 0)
    {
      /* There were no PT_LOAD segments, so we don't have anything to read.  */
      free (x_phdrs);
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  shdr_end = 0;
  if (i_ehdr.e_shoff != 0 && i_ehdr.e_shnum != 0 && i_ehdr.e_shentsize != 0)
    {
      shdr_end = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize;

      if (last_phdr->p_filesz != last_phdr->p_memsz)
	{
	  /* If the last PT_LOAD header has a bss area then ld.so will
	     have cleared anything past p_filesz, zapping the section
	     headers.  */
	}
      else if (size >= shdr_end)
	high_offset = size;
      else
	{
	  bfd_vma page_size = get_elf_backend_data (templ)->minpagesize;
	  bfd_vma segment_end = last_phdr->p_offset + last_phdr->p_filesz;

	  /* Assume we loaded full pages, allowing us to sometimes see
	     section headers.  */
	  if (page_size > 1 && shdr_end > segment_end)
	    {
	      bfd_vma page_end = (segment_end + page_size - 1) & -page_size;

	      if (page_end >= shdr_end)
		/* Whee, section headers covered.  */
		high_offset = shdr_end;
	    }
	}
    }

  /* Now we know the size of the whole image we want read in.  */
  contents = (bfd_byte *) bfd_zmalloc (high_offset);
  if (contents == NULL)
    {
      free (x_phdrs);
      return NULL;
    }

  for (i = 0; i < i_ehdr.e_phnum; ++i)
    if (i_phdrs[i].p_type == PT_LOAD)
      {
	bfd_vma start = i_phdrs[i].p_offset;         /* Octets.  */
	bfd_vma end = start + i_phdrs[i].p_filesz;   /* Octets.  */
	bfd_vma vaddr = i_phdrs[i].p_vaddr;          /* Octets.  */

	/* Extend the beginning of the first pt_load to cover file
	   header and program headers, if we proved earlier that its
	   aligned offset is 0.  */
	if (first_phdr == &i_phdrs[i])
	  {
	    vaddr -= start;
	    start = 0;
	  }
	/* Extend the end of the last pt_load to cover section headers.  */
	if (last_phdr == &i_phdrs[i])
	  end = high_offset;
	err = target_read_memory (loadbase + vaddr / opb,
				  contents + start, end - start);
	if (err)
	  {
	    free (x_phdrs);
	    free (contents);
	    bfd_set_error (bfd_error_system_call);
	    errno = err;
	    return NULL;
	  }
      }
  free (x_phdrs);

  /* If the segments visible in memory didn't include the section headers,
     then clear them from the file header.  */
  if (high_offset < shdr_end)
    {
      memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff);
      memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum);
      memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx);
    }

  /* This will normally have been in the first PT_LOAD segment.  But it
     conceivably could be missing, and we might have just changed it.  */
  memcpy (contents, &x_ehdr, sizeof x_ehdr);

  /* Now we have a memory image of the ELF file contents.  Make a BFD.  */
  bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory));
  if (bim == NULL)
    {
      free (contents);
      return NULL;
    }
  nbfd = _bfd_new_bfd ();
  if (nbfd == NULL
      || !bfd_set_filename (nbfd, "<in-memory>"))
    {
      free (bim);
      free (contents);
      return NULL;
    }
  nbfd->xvec = templ->xvec;
  bim->size = high_offset;
  bim->buffer = contents;
  nbfd->iostream = bim;
  nbfd->flags = BFD_IN_MEMORY;
  nbfd->iovec = &_bfd_memory_iovec;
  nbfd->origin = 0;
  nbfd->direction = read_direction;
  nbfd->mtime = time (NULL);
  nbfd->mtime_set = TRUE;

  if (loadbasep)
    *loadbasep = loadbase;
  return nbfd;
}

/* Function for ELF_R_INFO.  */

bfd_vma
NAME(elf,r_info) (bfd_vma sym, bfd_vma type)
{
  return ELF_R_INFO (sym, type);
}

/* Function for ELF_R_SYM.  */

bfd_vma
NAME(elf,r_sym) (bfd_vma r_info)
{
  return ELF_R_SYM (r_info);
}

#include "elfcore.h"

/* Size-dependent data and functions.  */
const struct elf_size_info NAME(_bfd_elf,size_info) = {
  sizeof (Elf_External_Ehdr),
  sizeof (Elf_External_Phdr),
  sizeof (Elf_External_Shdr),
  sizeof (Elf_External_Rel),
  sizeof (Elf_External_Rela),
  sizeof (Elf_External_Sym),
  sizeof (Elf_External_Dyn),
  sizeof (Elf_External_Note),
  4,
  1,
  ARCH_SIZE, LOG_FILE_ALIGN,
  ELFCLASS, EV_CURRENT,
  elf_write_out_phdrs,
  elf_write_shdrs_and_ehdr,
  elf_checksum_contents,
  elf_write_relocs,
  elf_swap_symbol_in,
  elf_swap_symbol_out,
  elf_slurp_reloc_table,
  elf_slurp_symbol_table,
  elf_swap_dyn_in,
  elf_swap_dyn_out,
  elf_swap_reloc_in,
  elf_swap_reloc_out,
  elf_swap_reloca_in,
  elf_swap_reloca_out
};