summaryrefslogtreecommitdiff
path: root/bfd/peicode.h
blob: f7d2b5f5f526762b7e61435193d13395f988175a (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
/* Support for the generic parts of PE/PEI, for BFD.
   Copyright (C) 1995-2020 Free Software Foundation, Inc.
   Written by Cygnus Solutions.

   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.  */


/* Most of this hacked by  Steve Chamberlain,
			sac@cygnus.com

   PE/PEI rearrangement (and code added): Donn Terry
				       Softway Systems, Inc.  */

/* Hey look, some documentation [and in a place you expect to find it]!

   The main reference for the pei format is "Microsoft Portable Executable
   and Common Object File Format Specification 4.1".  Get it if you need to
   do some serious hacking on this code.

   Another reference:
   "Peering Inside the PE: A Tour of the Win32 Portable Executable
   File Format", MSJ 1994, Volume 9.

   The *sole* difference between the pe format and the pei format is that the
   latter has an MSDOS 2.0 .exe header on the front that prints the message
   "This app must be run under Windows." (or some such).
   (FIXME: Whether that statement is *really* true or not is unknown.
   Are there more subtle differences between pe and pei formats?
   For now assume there aren't.  If you find one, then for God sakes
   document it here!)

   The Microsoft docs use the word "image" instead of "executable" because
   the former can also refer to a DLL (shared library).  Confusion can arise
   because the `i' in `pei' also refers to "image".  The `pe' format can
   also create images (i.e. executables), it's just that to run on a win32
   system you need to use the pei format.

   FIXME: Please add more docs here so the next poor fool that has to hack
   on this code has a chance of getting something accomplished without
   wasting too much time.  */

#include "libpei.h"

static bfd_boolean (*pe_saved_coff_bfd_print_private_bfd_data) (bfd *, void *) =
#ifndef coff_bfd_print_private_bfd_data
     NULL;
#else
     coff_bfd_print_private_bfd_data;
#undef coff_bfd_print_private_bfd_data
#endif

static bfd_boolean			pe_print_private_bfd_data (bfd *, void *);
#define coff_bfd_print_private_bfd_data pe_print_private_bfd_data

static bfd_boolean (*pe_saved_coff_bfd_copy_private_bfd_data) (bfd *, bfd *) =
#ifndef coff_bfd_copy_private_bfd_data
     NULL;
#else
     coff_bfd_copy_private_bfd_data;
#undef coff_bfd_copy_private_bfd_data
#endif

static bfd_boolean		       pe_bfd_copy_private_bfd_data (bfd *, bfd *);
#define coff_bfd_copy_private_bfd_data pe_bfd_copy_private_bfd_data

#define coff_mkobject	   pe_mkobject
#define coff_mkobject_hook pe_mkobject_hook

#ifdef COFF_IMAGE_WITH_PE
/* This structure contains static variables used by the ILF code.  */
typedef asection * asection_ptr;

typedef struct
{
  bfd *			abfd;
  bfd_byte *		data;
  struct bfd_in_memory * bim;
  unsigned short	magic;

  arelent *		reltab;
  unsigned int		relcount;

  coff_symbol_type *	sym_cache;
  coff_symbol_type *	sym_ptr;
  unsigned int		sym_index;

  unsigned int *	sym_table;
  unsigned int *	table_ptr;

  combined_entry_type * native_syms;
  combined_entry_type * native_ptr;

  coff_symbol_type **	sym_ptr_table;
  coff_symbol_type **	sym_ptr_ptr;

  unsigned int		sec_index;

  char *		string_table;
  char *		string_ptr;
  char *		end_string_ptr;

  SYMENT *		esym_table;
  SYMENT *		esym_ptr;

  struct internal_reloc * int_reltab;
}
pe_ILF_vars;
#endif /* COFF_IMAGE_WITH_PE */

bfd_cleanup coff_real_object_p
  (bfd *, unsigned, struct internal_filehdr *, struct internal_aouthdr *);

#ifndef NO_COFF_RELOCS
static void
coff_swap_reloc_in (bfd * abfd, void * src, void * dst)
{
  RELOC *reloc_src = (RELOC *) src;
  struct internal_reloc *reloc_dst = (struct internal_reloc *) dst;

  reloc_dst->r_vaddr  = H_GET_32 (abfd, reloc_src->r_vaddr);
  reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx);
  reloc_dst->r_type   = H_GET_16 (abfd, reloc_src->r_type);
#ifdef SWAP_IN_RELOC_OFFSET
  reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, reloc_src->r_offset);
#endif
}

static unsigned int
coff_swap_reloc_out (bfd * abfd, void * src, void * dst)
{
  struct internal_reloc *reloc_src = (struct internal_reloc *) src;
  struct external_reloc *reloc_dst = (struct external_reloc *) dst;

  H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
  H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
  H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type);

#ifdef SWAP_OUT_RELOC_OFFSET
  SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, reloc_dst->r_offset);
#endif
#ifdef SWAP_OUT_RELOC_EXTRA
  SWAP_OUT_RELOC_EXTRA (abfd, reloc_src, reloc_dst);
#endif
  return RELSZ;
}
#endif /* not NO_COFF_RELOCS */

#ifdef COFF_IMAGE_WITH_PE
#undef FILHDR
#define FILHDR struct external_PEI_IMAGE_hdr
#endif

static void
coff_swap_filehdr_in (bfd * abfd, void * src, void * dst)
{
  FILHDR *filehdr_src = (FILHDR *) src;
  struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst;

  filehdr_dst->f_magic  = H_GET_16 (abfd, filehdr_src->f_magic);
  filehdr_dst->f_nscns  = H_GET_16 (abfd, filehdr_src->f_nscns);
  filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src->f_timdat);
  filehdr_dst->f_nsyms  = H_GET_32 (abfd, filehdr_src->f_nsyms);
  filehdr_dst->f_flags  = H_GET_16 (abfd, filehdr_src->f_flags);
  filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr);

  /* Other people's tools sometimes generate headers with an nsyms but
     a zero symptr.  */
  if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0)
    {
      filehdr_dst->f_nsyms = 0;
      filehdr_dst->f_flags |= F_LSYMS;
    }

  filehdr_dst->f_opthdr = H_GET_16 (abfd, filehdr_src-> f_opthdr);
}

#ifdef COFF_IMAGE_WITH_PE
# define coff_swap_filehdr_out _bfd_XXi_only_swap_filehdr_out
#elif defined COFF_WITH_pex64
# define coff_swap_filehdr_out _bfd_pex64_only_swap_filehdr_out
#elif defined COFF_WITH_pep
# define coff_swap_filehdr_out _bfd_pep_only_swap_filehdr_out
#else
# define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out
#endif

static void
coff_swap_scnhdr_in (bfd * abfd, void * ext, void * in)
{
  SCNHDR *scnhdr_ext = (SCNHDR *) ext;
  struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;

  memcpy (scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name));

  scnhdr_int->s_vaddr   = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr);
  scnhdr_int->s_paddr   = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr);
  scnhdr_int->s_size    = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size);
  scnhdr_int->s_scnptr  = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr);
  scnhdr_int->s_relptr  = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr);
  scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr);
  scnhdr_int->s_flags   = H_GET_32 (abfd, scnhdr_ext->s_flags);

  /* MS handles overflow of line numbers by carrying into the reloc
     field (it appears).  Since it's supposed to be zero for PE
     *IMAGE* format, that's safe.  This is still a bit iffy.  */
#ifdef COFF_IMAGE_WITH_PE
  scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno)
			 + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16));
  scnhdr_int->s_nreloc = 0;
#else
  scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc);
  scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno);
#endif

  if (scnhdr_int->s_vaddr != 0)
    {
      scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase;
      /* Do not cut upper 32-bits for 64-bit vma.  */
#ifndef COFF_WITH_pex64
      scnhdr_int->s_vaddr &= 0xffffffff;
#endif
    }

#ifndef COFF_NO_HACK_SCNHDR_SIZE
  /* If this section holds uninitialized data and is from an object file
     or from an executable image that has not initialized the field,
     or if the image is an executable file and the physical size is padded,
     use the virtual size (stored in s_paddr) instead.  */
  if (scnhdr_int->s_paddr > 0
      && (((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0
	   && (! bfd_pei_p (abfd) || scnhdr_int->s_size == 0))
	  || (bfd_pei_p (abfd) && (scnhdr_int->s_size > scnhdr_int->s_paddr))))
  /* This code used to set scnhdr_int->s_paddr to 0.  However,
     coff_set_alignment_hook stores s_paddr in virt_size, which
     only works if it correctly holds the virtual size of the
     section.  */
    scnhdr_int->s_size = scnhdr_int->s_paddr;
#endif
}

static bfd_boolean
pe_mkobject (bfd * abfd)
{
  pe_data_type *pe;
  size_t amt = sizeof (pe_data_type);

  abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt);

  if (abfd->tdata.pe_obj_data == 0)
    return FALSE;

  pe = pe_data (abfd);

  pe->coff.pe = 1;

  /* in_reloc_p is architecture dependent.  */
  pe->in_reloc_p = in_reloc_p;

  /* Default DOS message string.  */
  pe->dos_message[0]  = 0x0eba1f0e;
  pe->dos_message[1]  = 0xcd09b400;
  pe->dos_message[2]  = 0x4c01b821;
  pe->dos_message[3]  = 0x685421cd;
  pe->dos_message[4]  = 0x70207369;
  pe->dos_message[5]  = 0x72676f72;
  pe->dos_message[6]  = 0x63206d61;
  pe->dos_message[7]  = 0x6f6e6e61;
  pe->dos_message[8]  = 0x65622074;
  pe->dos_message[9]  = 0x6e757220;
  pe->dos_message[10] = 0x206e6920;
  pe->dos_message[11] = 0x20534f44;
  pe->dos_message[12] = 0x65646f6d;
  pe->dos_message[13] = 0x0a0d0d2e;
  pe->dos_message[14] = 0x24;
  pe->dos_message[15] = 0x0;

  memset (& pe->pe_opthdr, 0, sizeof pe->pe_opthdr);
  return TRUE;
}

/* Create the COFF backend specific information.  */

static void *
pe_mkobject_hook (bfd * abfd,
		  void * filehdr,
		  void * aouthdr ATTRIBUTE_UNUSED)
{
  struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
  pe_data_type *pe;

  if (! pe_mkobject (abfd))
    return NULL;

  pe = pe_data (abfd);
  pe->coff.sym_filepos = internal_f->f_symptr;
  /* These members communicate important constants about the symbol
     table to GDB's symbol-reading code.  These `constants'
     unfortunately vary among coff implementations...  */
  pe->coff.local_n_btmask = N_BTMASK;
  pe->coff.local_n_btshft = N_BTSHFT;
  pe->coff.local_n_tmask = N_TMASK;
  pe->coff.local_n_tshift = N_TSHIFT;
  pe->coff.local_symesz = SYMESZ;
  pe->coff.local_auxesz = AUXESZ;
  pe->coff.local_linesz = LINESZ;

  pe->coff.timestamp = internal_f->f_timdat;

  obj_raw_syment_count (abfd) =
    obj_conv_table_size (abfd) =
      internal_f->f_nsyms;

  pe->real_flags = internal_f->f_flags;

  if ((internal_f->f_flags & F_DLL) != 0)
    pe->dll = 1;

  if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0)
    abfd->flags |= HAS_DEBUG;

#ifdef COFF_IMAGE_WITH_PE
  if (aouthdr)
    pe->pe_opthdr = ((struct internal_aouthdr *) aouthdr)->pe;
#endif

#ifdef ARM
  if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags))
    coff_data (abfd) ->flags = 0;
#endif

  memcpy (pe->dos_message, internal_f->pe.dos_message,
	  sizeof (pe->dos_message));

  return (void *) pe;
}

static bfd_boolean
pe_print_private_bfd_data (bfd *abfd, void * vfile)
{
  FILE *file = (FILE *) vfile;

  if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile))
    return FALSE;

  if (pe_saved_coff_bfd_print_private_bfd_data == NULL)
    return TRUE;

  fputc ('\n', file);

  return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile);
}

/* Copy any private info we understand from the input bfd
   to the output bfd.  */

static bfd_boolean
pe_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
{
  /* PR binutils/716: Copy the large address aware flag.
     XXX: Should we be copying other flags or other fields in the pe_data()
     structure ?  */
  if (pe_data (obfd) != NULL
      && pe_data (ibfd) != NULL
      && pe_data (ibfd)->real_flags & IMAGE_FILE_LARGE_ADDRESS_AWARE)
    pe_data (obfd)->real_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE;

  if (!_bfd_XX_bfd_copy_private_bfd_data_common (ibfd, obfd))
    return FALSE;

  if (pe_saved_coff_bfd_copy_private_bfd_data)
    return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd);

  return TRUE;
}

#define coff_bfd_copy_private_section_data \
  _bfd_XX_bfd_copy_private_section_data

#define coff_get_symbol_info _bfd_XX_get_symbol_info

#ifdef COFF_IMAGE_WITH_PE

/* Code to handle Microsoft's Image Library Format.
   Also known as LINK6 format.
   Documentation about this format can be found at:

   http://msdn.microsoft.com/library/specs/pecoff_section8.htm  */

/* The following constants specify the sizes of the various data
   structures that we have to create in order to build a bfd describing
   an ILF object file.  The final "+ 1" in the definitions of SIZEOF_IDATA6
   and SIZEOF_IDATA7 below is to allow for the possibility that we might
   need a padding byte in order to ensure 16 bit alignment for the section's
   contents.

   The value for SIZEOF_ILF_STRINGS is computed as follows:

      There will be NUM_ILF_SECTIONS section symbols.  Allow 9 characters
      per symbol for their names (longest section name is .idata$x).

      There will be two symbols for the imported value, one the symbol name
      and one with _imp__ prefixed.  Allowing for the terminating nul's this
      is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll).

      The strings in the string table must start STRING__SIZE_SIZE bytes into
      the table in order to for the string lookup code in coffgen/coffcode to
      work.  */
#define NUM_ILF_RELOCS		8
#define NUM_ILF_SECTIONS	6
#define NUM_ILF_SYMS		(2 + NUM_ILF_SECTIONS)

#define SIZEOF_ILF_SYMS		 (NUM_ILF_SYMS * sizeof (* vars.sym_cache))
#define SIZEOF_ILF_SYM_TABLE	 (NUM_ILF_SYMS * sizeof (* vars.sym_table))
#define SIZEOF_ILF_NATIVE_SYMS	 (NUM_ILF_SYMS * sizeof (* vars.native_syms))
#define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table))
#define SIZEOF_ILF_EXT_SYMS	 (NUM_ILF_SYMS * sizeof (* vars.esym_table))
#define SIZEOF_ILF_RELOCS	 (NUM_ILF_RELOCS * sizeof (* vars.reltab))
#define SIZEOF_ILF_INT_RELOCS	 (NUM_ILF_RELOCS * sizeof (* vars.int_reltab))
#define SIZEOF_ILF_STRINGS	 (strlen (symbol_name) * 2 + 8 \
					+ 21 + strlen (source_dll) \
					+ NUM_ILF_SECTIONS * 9 \
					+ STRING_SIZE_SIZE)
#define SIZEOF_IDATA2		(5 * 4)

/* For PEx64 idata4 & 5 have thumb size of 8 bytes.  */
#ifdef COFF_WITH_pex64
#define SIZEOF_IDATA4		(2 * 4)
#define SIZEOF_IDATA5		(2 * 4)
#else
#define SIZEOF_IDATA4		(1 * 4)
#define SIZEOF_IDATA5		(1 * 4)
#endif

#define SIZEOF_IDATA6		(2 + strlen (symbol_name) + 1 + 1)
#define SIZEOF_IDATA7		(strlen (source_dll) + 1 + 1)
#define SIZEOF_ILF_SECTIONS	(NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata))

#define ILF_DATA_SIZE				\
    + SIZEOF_ILF_SYMS				\
    + SIZEOF_ILF_SYM_TABLE			\
    + SIZEOF_ILF_NATIVE_SYMS			\
    + SIZEOF_ILF_SYM_PTR_TABLE			\
    + SIZEOF_ILF_EXT_SYMS			\
    + SIZEOF_ILF_RELOCS				\
    + SIZEOF_ILF_INT_RELOCS			\
    + SIZEOF_ILF_STRINGS			\
    + SIZEOF_IDATA2				\
    + SIZEOF_IDATA4				\
    + SIZEOF_IDATA5				\
    + SIZEOF_IDATA6				\
    + SIZEOF_IDATA7				\
    + SIZEOF_ILF_SECTIONS			\
    + MAX_TEXT_SECTION_SIZE

/* Create an empty relocation against the given symbol.  */

static void
pe_ILF_make_a_symbol_reloc (pe_ILF_vars *		vars,
			    bfd_vma			address,
			    bfd_reloc_code_real_type	reloc,
			    struct bfd_symbol **	sym,
			    unsigned int		sym_index)
{
  arelent * entry;
  struct internal_reloc * internal;

  entry = vars->reltab + vars->relcount;
  internal = vars->int_reltab + vars->relcount;

  entry->address     = address;
  entry->addend      = 0;
  entry->howto       = bfd_reloc_type_lookup (vars->abfd, reloc);
  entry->sym_ptr_ptr = sym;

  internal->r_vaddr  = address;
  internal->r_symndx = sym_index;
  internal->r_type   = entry->howto->type;

  vars->relcount ++;

  BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS);
}

/* Create an empty relocation against the given section.  */

static void
pe_ILF_make_a_reloc (pe_ILF_vars *	       vars,
		     bfd_vma		       address,
		     bfd_reloc_code_real_type  reloc,
		     asection_ptr	       sec)
{
  pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr,
			      coff_section_data (vars->abfd, sec)->i);
}

/* Move the queued relocs into the given section.  */

static void
pe_ILF_save_relocs (pe_ILF_vars * vars,
		    asection_ptr  sec)
{
  /* Make sure that there is somewhere to store the internal relocs.  */
  if (coff_section_data (vars->abfd, sec) == NULL)
    /* We should probably return an error indication here.  */
    abort ();

  coff_section_data (vars->abfd, sec)->relocs = vars->int_reltab;
  coff_section_data (vars->abfd, sec)->keep_relocs = TRUE;

  sec->relocation  = vars->reltab;
  sec->reloc_count = vars->relcount;
  sec->flags      |= SEC_RELOC;

  vars->reltab     += vars->relcount;
  vars->int_reltab += vars->relcount;
  vars->relcount   = 0;

  BFD_ASSERT ((bfd_byte *) vars->int_reltab < (bfd_byte *) vars->string_table);
}

/* Create a global symbol and add it to the relevant tables.  */

static void
pe_ILF_make_a_symbol (pe_ILF_vars *  vars,
		      const char *   prefix,
		      const char *   symbol_name,
		      asection_ptr   section,
		      flagword       extra_flags)
{
  coff_symbol_type * sym;
  combined_entry_type * ent;
  SYMENT * esym;
  unsigned short sclass;

  if (extra_flags & BSF_LOCAL)
    sclass = C_STAT;
  else
    sclass = C_EXT;

#ifdef THUMBPEMAGIC
  if (vars->magic == THUMBPEMAGIC)
    {
      if (extra_flags & BSF_FUNCTION)
	sclass = C_THUMBEXTFUNC;
      else if (extra_flags & BSF_LOCAL)
	sclass = C_THUMBSTAT;
      else
	sclass = C_THUMBEXT;
    }
#endif

  BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS);

  sym = vars->sym_ptr;
  ent = vars->native_ptr;
  esym = vars->esym_ptr;

  /* Copy the symbol's name into the string table.  */
  sprintf (vars->string_ptr, "%s%s", prefix, symbol_name);

  if (section == NULL)
    section = bfd_und_section_ptr;

  /* Initialise the external symbol.  */
  H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table,
	    esym->e.e.e_offset);
  H_PUT_16 (vars->abfd, section->target_index, esym->e_scnum);
  esym->e_sclass[0] = sclass;

  /* The following initialisations are unnecessary - the memory is
     zero initialised.  They are just kept here as reminders.  */

  /* Initialise the internal symbol structure.  */
  ent->u.syment.n_sclass	  = sclass;
  ent->u.syment.n_scnum		  = section->target_index;
  ent->u.syment._n._n_n._n_offset = (bfd_hostptr_t) sym;
  ent->is_sym = TRUE;

  sym->symbol.the_bfd = vars->abfd;
  sym->symbol.name    = vars->string_ptr;
  sym->symbol.flags   = BSF_EXPORT | BSF_GLOBAL | extra_flags;
  sym->symbol.section = section;
  sym->native	      = ent;

  * vars->table_ptr = vars->sym_index;
  * vars->sym_ptr_ptr = sym;

  /* Adjust pointers for the next symbol.  */
  vars->sym_index ++;
  vars->sym_ptr ++;
  vars->sym_ptr_ptr ++;
  vars->table_ptr ++;
  vars->native_ptr ++;
  vars->esym_ptr ++;
  vars->string_ptr += strlen (symbol_name) + strlen (prefix) + 1;

  BFD_ASSERT (vars->string_ptr < vars->end_string_ptr);
}

/* Create a section.  */

static asection_ptr
pe_ILF_make_a_section (pe_ILF_vars * vars,
		       const char *  name,
		       unsigned int  size,
		       flagword      extra_flags)
{
  asection_ptr sec;
  flagword     flags;
  intptr_t alignment;

  sec = bfd_make_section_old_way (vars->abfd, name);
  if (sec == NULL)
    return NULL;

  flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY;

  bfd_set_section_flags (sec, flags | extra_flags);

  bfd_set_section_alignment (sec, 2);

  /* Check that we will not run out of space.  */
  BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size);

  /* Set the section size and contents.  The actual
     contents are filled in by our parent.  */
  bfd_set_section_size (sec, (bfd_size_type) size);
  sec->contents = vars->data;
  sec->target_index = vars->sec_index ++;

  /* Advance data pointer in the vars structure.  */
  vars->data += size;

  /* Skip the padding byte if it was not needed.
     The logic here is that if the string length is odd,
     then the entire string length, including the null byte,
     is even and so the extra, padding byte, is not needed.  */
  if (size & 1)
    vars->data --;

  /* PR 18758: See note in pe_ILF_buid_a_bfd.  We must make sure that we
     preserve host alignment requirements.  The BFD_ASSERTs in this
     functions will warn us if we run out of room, but we should
     already have enough padding built in to ILF_DATA_SIZE.  */
#if GCC_VERSION >= 3000
  alignment = __alignof__ (struct coff_section_tdata);
#else
  alignment = 8;
#endif
  vars->data
    = (bfd_byte *) (((intptr_t) vars->data + alignment - 1) & -alignment);

  /* Create a coff_section_tdata structure for our use.  */
  sec->used_by_bfd = (struct coff_section_tdata *) vars->data;
  vars->data += sizeof (struct coff_section_tdata);

  BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size);

  /* Create a symbol to refer to this section.  */
  pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL);

  /* Cache the index to the symbol in the coff_section_data structure.  */
  coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1;

  return sec;
}

/* This structure contains the code that goes into the .text section
   in order to perform a jump into the DLL lookup table.  The entries
   in the table are index by the magic number used to represent the
   machine type in the PE file.  The contents of the data[] arrays in
   these entries are stolen from the jtab[] arrays in ld/pe-dll.c.
   The SIZE field says how many bytes in the DATA array are actually
   used.  The OFFSET field says where in the data array the address
   of the .idata$5 section should be placed.  */
#define MAX_TEXT_SECTION_SIZE 32

typedef struct
{
  unsigned short magic;
  unsigned char  data[MAX_TEXT_SECTION_SIZE];
  unsigned int   size;
  unsigned int   offset;
}
jump_table;

static jump_table jtab[] =
{
#ifdef I386MAGIC
  { I386MAGIC,
    { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 },
    8, 2
  },
#endif

#ifdef AMD64MAGIC
  { AMD64MAGIC,
    { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 },
    8, 2
  },
#endif

#ifdef  MC68MAGIC
  { MC68MAGIC,
    { /* XXX fill me in */ },
    0, 0
  },
#endif

#ifdef  MIPS_ARCH_MAGIC_WINCE
  { MIPS_ARCH_MAGIC_WINCE,
    { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d,
      0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 },
    16, 0
  },
#endif

#ifdef  SH_ARCH_MAGIC_WINCE
  { SH_ARCH_MAGIC_WINCE,
    { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40,
      0x09, 0x00, 0x00, 0x00, 0x00, 0x00 },
    12, 8
  },
#endif

#ifdef  ARMPEMAGIC
  { ARMPEMAGIC,
    { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0,
      0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00},
    12, 8
  },
#endif

#ifdef  THUMBPEMAGIC
  { THUMBPEMAGIC,
    { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46,
      0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 },
    16, 12
  },
#endif
  { 0, { 0 }, 0, 0 }
};

#ifndef NUM_ENTRIES
#define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0])
#endif

/* Build a full BFD from the information supplied in a ILF object.  */

static bfd_boolean
pe_ILF_build_a_bfd (bfd *	    abfd,
		    unsigned int    magic,
		    char *	    symbol_name,
		    char *	    source_dll,
		    unsigned int    ordinal,
		    unsigned int    types)
{
  bfd_byte *		   ptr;
  pe_ILF_vars		   vars;
  struct internal_filehdr  internal_f;
  unsigned int		   import_type;
  unsigned int		   import_name_type;
  asection_ptr		   id4, id5, id6 = NULL, text = NULL;
  coff_symbol_type **	   imp_sym;
  unsigned int		   imp_index;
  intptr_t alignment;

  /* Decode and verify the types field of the ILF structure.  */
  import_type = types & 0x3;
  import_name_type = (types & 0x1c) >> 2;

  switch (import_type)
    {
    case IMPORT_CODE:
    case IMPORT_DATA:
      break;

    case IMPORT_CONST:
      /* XXX code yet to be written.  */
      /* xgettext:c-format */
      _bfd_error_handler (_("%pB: unhandled import type; %x"),
			  abfd, import_type);
      return FALSE;

    default:
      /* xgettext:c-format */
      _bfd_error_handler (_("%pB: unrecognized import type; %x"),
			  abfd, import_type);
      return FALSE;
    }

  switch (import_name_type)
    {
    case IMPORT_ORDINAL:
    case IMPORT_NAME:
    case IMPORT_NAME_NOPREFIX:
    case IMPORT_NAME_UNDECORATE:
      break;

    default:
      /* xgettext:c-format */
      _bfd_error_handler (_("%pB: unrecognized import name type; %x"),
			  abfd, import_name_type);
      return FALSE;
    }

  /* Initialise local variables.

     Note these are kept in a structure rather than being
     declared as statics since bfd frowns on global variables.

     We are going to construct the contents of the BFD in memory,
     so allocate all the space that we will need right now.  */
  vars.bim
    = (struct bfd_in_memory *) bfd_malloc ((bfd_size_type) sizeof (*vars.bim));
  if (vars.bim == NULL)
    return FALSE;

  ptr = (bfd_byte *) bfd_zmalloc ((bfd_size_type) ILF_DATA_SIZE);
  vars.bim->buffer = ptr;
  vars.bim->size   = ILF_DATA_SIZE;
  if (ptr == NULL)
    goto error_return;

  /* Initialise the pointers to regions of the memory and the
     other contents of the pe_ILF_vars structure as well.  */
  vars.sym_cache = (coff_symbol_type *) ptr;
  vars.sym_ptr   = (coff_symbol_type *) ptr;
  vars.sym_index = 0;
  ptr += SIZEOF_ILF_SYMS;

  vars.sym_table = (unsigned int *) ptr;
  vars.table_ptr = (unsigned int *) ptr;
  ptr += SIZEOF_ILF_SYM_TABLE;

  vars.native_syms = (combined_entry_type *) ptr;
  vars.native_ptr  = (combined_entry_type *) ptr;
  ptr += SIZEOF_ILF_NATIVE_SYMS;

  vars.sym_ptr_table = (coff_symbol_type **) ptr;
  vars.sym_ptr_ptr   = (coff_symbol_type **) ptr;
  ptr += SIZEOF_ILF_SYM_PTR_TABLE;

  vars.esym_table = (SYMENT *) ptr;
  vars.esym_ptr   = (SYMENT *) ptr;
  ptr += SIZEOF_ILF_EXT_SYMS;

  vars.reltab   = (arelent *) ptr;
  vars.relcount = 0;
  ptr += SIZEOF_ILF_RELOCS;

  vars.int_reltab  = (struct internal_reloc *) ptr;
  ptr += SIZEOF_ILF_INT_RELOCS;

  vars.string_table = (char *) ptr;
  vars.string_ptr   = (char *) ptr + STRING_SIZE_SIZE;
  ptr += SIZEOF_ILF_STRINGS;
  vars.end_string_ptr = (char *) ptr;

  /* The remaining space in bim->buffer is used
     by the pe_ILF_make_a_section() function.  */

  /* PR 18758: Make sure that the data area is sufficiently aligned for
     struct coff_section_tdata.  __alignof__ is a gcc extension, hence
     the test of GCC_VERSION.  For other compilers we assume 8 byte
     alignment.  */
#if GCC_VERSION >= 3000
  alignment = __alignof__ (struct coff_section_tdata);
#else
  alignment = 8;
#endif
  ptr = (bfd_byte *) (((intptr_t) ptr + alignment - 1) & -alignment);

  vars.data = ptr;
  vars.abfd = abfd;
  vars.sec_index = 0;
  vars.magic = magic;

  /* Create the initial .idata$<n> sections:
     [.idata$2:  Import Directory Table -- not needed]
     .idata$4:  Import Lookup Table
     .idata$5:  Import Address Table

     Note we do not create a .idata$3 section as this is
     created for us by the linker script.  */
  id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0);
  id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0);
  if (id4 == NULL || id5 == NULL)
    goto error_return;

  /* Fill in the contents of these sections.  */
  if (import_name_type == IMPORT_ORDINAL)
    {
      if (ordinal == 0)
	/* See PR 20907 for a reproducer.  */
	goto error_return;

#ifdef COFF_WITH_pex64
      ((unsigned int *) id4->contents)[0] = ordinal;
      ((unsigned int *) id4->contents)[1] = 0x80000000;
      ((unsigned int *) id5->contents)[0] = ordinal;
      ((unsigned int *) id5->contents)[1] = 0x80000000;
#else
      * (unsigned int *) id4->contents = ordinal | 0x80000000;
      * (unsigned int *) id5->contents = ordinal | 0x80000000;
#endif
    }
  else
    {
      char * symbol;
      unsigned int len;

      /* Create .idata$6 - the Hint Name Table.  */
      id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0);
      if (id6 == NULL)
	goto error_return;

      /* If necessary, trim the import symbol name.  */
      symbol = symbol_name;

      /* As used by MS compiler, '_', '@', and '?' are alternative
	 forms of USER_LABEL_PREFIX, with '?' for c++ mangled names,
	 '@' used for fastcall (in C),  '_' everywhere else.  Only one
	 of these is used for a symbol.  We strip this leading char for
	 IMPORT_NAME_NOPREFIX and IMPORT_NAME_UNDECORATE as per the
	 PE COFF 6.0 spec (section 8.3, Import Name Type).  */

      if (import_name_type != IMPORT_NAME)
	{
	  char c = symbol[0];

	  /* Check that we don't remove for targets with empty
	     USER_LABEL_PREFIX the leading underscore.  */
	  if ((c == '_' && abfd->xvec->symbol_leading_char != 0)
	      || c == '@' || c == '?')
	    symbol++;
	}

      len = strlen (symbol);
      if (import_name_type == IMPORT_NAME_UNDECORATE)
	{
	  /* Truncate at the first '@'.  */
	  char *at = strchr (symbol, '@');

	  if (at != NULL)
	    len = at - symbol;
	}

      id6->contents[0] = ordinal & 0xff;
      id6->contents[1] = ordinal >> 8;

      memcpy ((char *) id6->contents + 2, symbol, len);
      id6->contents[len + 2] = '\0';
    }

  if (import_name_type != IMPORT_ORDINAL)
    {
      pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6);
      pe_ILF_save_relocs (&vars, id4);

      pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6);
      pe_ILF_save_relocs (&vars, id5);
    }

  /* Create an import symbol.  */
  pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0);
  imp_sym   = vars.sym_ptr_ptr - 1;
  imp_index = vars.sym_index - 1;

  /* Create extra sections depending upon the type of import we are dealing with.  */
  switch (import_type)
    {
      int i;

    case IMPORT_CODE:
      /* CODE functions are special, in that they get a trampoline that
	 jumps to the main import symbol.  Create a .text section to hold it.
	 First we need to look up its contents in the jump table.  */
      for (i = NUM_ENTRIES (jtab); i--;)
	{
	  if (jtab[i].size == 0)
	    continue;
	  if (jtab[i].magic == magic)
	    break;
	}
      /* If we did not find a matching entry something is wrong.  */
      if (i < 0)
	abort ();

      /* Create the .text section.  */
      text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE);
      if (text == NULL)
	goto error_return;

      /* Copy in the jump code.  */
      memcpy (text->contents, jtab[i].data, jtab[i].size);

      /* Create a reloc for the data in the text section.  */
#ifdef MIPS_ARCH_MAGIC_WINCE
      if (magic == MIPS_ARCH_MAGIC_WINCE)
	{
	  pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 0, BFD_RELOC_HI16_S,
				      (struct bfd_symbol **) imp_sym,
				      imp_index);
	  pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_LO16, text);
	  pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 4, BFD_RELOC_LO16,
				      (struct bfd_symbol **) imp_sym,
				      imp_index);
	}
      else
#endif
#ifdef AMD64MAGIC
      if (magic == AMD64MAGIC)
	{
	  pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset,
				      BFD_RELOC_32_PCREL, (asymbol **) imp_sym,
				      imp_index);
	}
      else
#endif
	pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset,
				    BFD_RELOC_32, (asymbol **) imp_sym,
				    imp_index);

      pe_ILF_save_relocs (& vars, text);
      break;

    case IMPORT_DATA:
      break;

    default:
      /* XXX code not yet written.  */
      abort ();
    }

  /* Initialise the bfd.  */
  memset (& internal_f, 0, sizeof (internal_f));

  internal_f.f_magic  = magic;
  internal_f.f_symptr = 0;
  internal_f.f_nsyms  = 0;
  internal_f.f_flags  = F_AR32WR | F_LNNO; /* XXX is this correct ?  */

  if (   ! bfd_set_start_address (abfd, (bfd_vma) 0)
      || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f))
    goto error_return;

  if (bfd_coff_mkobject_hook (abfd, (void *) & internal_f, NULL) == NULL)
    goto error_return;

  coff_data (abfd)->pe = 1;
#ifdef THUMBPEMAGIC
  if (vars.magic == THUMBPEMAGIC)
    /* Stop some linker warnings about thumb code not supporting interworking.  */
    coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET;
#endif

  /* Switch from file contents to memory contents.  */
  bfd_cache_close (abfd);

  abfd->iostream = (void *) vars.bim;
  abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */;
  abfd->iovec = &_bfd_memory_iovec;
  abfd->where = 0;
  abfd->origin = 0;
  obj_sym_filepos (abfd) = 0;

  /* Now create a symbol describing the imported value.  */
  switch (import_type)
    {
    case IMPORT_CODE:
      pe_ILF_make_a_symbol (& vars, "", symbol_name, text,
			    BSF_NOT_AT_END | BSF_FUNCTION);

      break;

    case IMPORT_DATA:
      /* Nothing to do here.  */
      break;

    default:
      /* XXX code not yet written.  */
      abort ();
    }

  /* Create an import symbol for the DLL, without the .dll suffix.  */
  ptr = (bfd_byte *) strrchr (source_dll, '.');
  if (ptr)
    * ptr = 0;
  pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0);
  if (ptr)
    * ptr = '.';

  /* Point the bfd at the symbol table.  */
  obj_symbols (abfd) = vars.sym_cache;
  abfd->symcount = vars.sym_index;

  obj_raw_syments (abfd) = vars.native_syms;
  obj_raw_syment_count (abfd) = vars.sym_index;

  obj_coff_external_syms (abfd) = (void *) vars.esym_table;
  obj_coff_keep_syms (abfd) = TRUE;

  obj_convert (abfd) = vars.sym_table;
  obj_conv_table_size (abfd) = vars.sym_index;

  obj_coff_strings (abfd) = vars.string_table;
  obj_coff_keep_strings (abfd) = TRUE;

  abfd->flags |= HAS_SYMS;

  return TRUE;

 error_return:
  free (vars.bim->buffer);
  free (vars.bim);
  return FALSE;
}

/* We have detected a Image Library Format archive element.
   Decode the element and return the appropriate target.  */

static bfd_cleanup
pe_ILF_object_p (bfd * abfd)
{
  bfd_byte	  buffer[14];
  bfd_byte *	  ptr;
  char *	  symbol_name;
  char *	  source_dll;
  unsigned int	  machine;
  bfd_size_type	  size;
  unsigned int	  ordinal;
  unsigned int	  types;
  unsigned int	  magic;

  /* Upon entry the first six bytes of the ILF header have
      already been read.  Now read the rest of the header.  */
  if (bfd_bread (buffer, (bfd_size_type) 14, abfd) != 14)
    return NULL;

  ptr = buffer;

  machine = H_GET_16 (abfd, ptr);
  ptr += 2;

  /* Check that the machine type is recognised.  */
  magic = 0;

  switch (machine)
    {
    case IMAGE_FILE_MACHINE_UNKNOWN:
    case IMAGE_FILE_MACHINE_ALPHA:
    case IMAGE_FILE_MACHINE_ALPHA64:
    case IMAGE_FILE_MACHINE_IA64:
      break;

    case IMAGE_FILE_MACHINE_I386:
#ifdef I386MAGIC
      magic = I386MAGIC;
#endif
      break;

    case IMAGE_FILE_MACHINE_AMD64:
#ifdef AMD64MAGIC
      magic = AMD64MAGIC;
#endif
      break;

    case IMAGE_FILE_MACHINE_R3000:
    case IMAGE_FILE_MACHINE_R4000:
    case IMAGE_FILE_MACHINE_R10000:

    case IMAGE_FILE_MACHINE_MIPS16:
    case IMAGE_FILE_MACHINE_MIPSFPU:
    case IMAGE_FILE_MACHINE_MIPSFPU16:
#ifdef MIPS_ARCH_MAGIC_WINCE
      magic = MIPS_ARCH_MAGIC_WINCE;
#endif
      break;

    case IMAGE_FILE_MACHINE_SH3:
    case IMAGE_FILE_MACHINE_SH4:
#ifdef SH_ARCH_MAGIC_WINCE
      magic = SH_ARCH_MAGIC_WINCE;
#endif
      break;

    case IMAGE_FILE_MACHINE_ARM:
#ifdef ARMPEMAGIC
      magic = ARMPEMAGIC;
#endif
      break;

    case IMAGE_FILE_MACHINE_THUMB:
#ifdef THUMBPEMAGIC
      {
	extern const bfd_target TARGET_LITTLE_SYM;

	if (abfd->xvec == & TARGET_LITTLE_SYM)
	  magic = THUMBPEMAGIC;
      }
#endif
      break;

    case IMAGE_FILE_MACHINE_POWERPC:
      /* We no longer support PowerPC.  */
    default:
      _bfd_error_handler
	/* xgettext:c-format */
	(_("%pB: unrecognised machine type (0x%x)"
	   " in Import Library Format archive"),
	 abfd, machine);
      bfd_set_error (bfd_error_malformed_archive);

      return NULL;
      break;
    }

  if (magic == 0)
    {
      _bfd_error_handler
	/* xgettext:c-format */
	(_("%pB: recognised but unhandled machine type (0x%x)"
	   " in Import Library Format archive"),
	 abfd, machine);
      bfd_set_error (bfd_error_wrong_format);

      return NULL;
    }

  /* We do not bother to check the date.
     date = H_GET_32 (abfd, ptr);  */
  ptr += 4;

  size = H_GET_32 (abfd, ptr);
  ptr += 4;

  if (size == 0)
    {
      _bfd_error_handler
	(_("%pB: size field is zero in Import Library Format header"), abfd);
      bfd_set_error (bfd_error_malformed_archive);

      return NULL;
    }

  ordinal = H_GET_16 (abfd, ptr);
  ptr += 2;

  types = H_GET_16 (abfd, ptr);
  /* ptr += 2; */

  /* Now read in the two strings that follow.  */
  ptr = (bfd_byte *) _bfd_alloc_and_read (abfd, size, size);
  if (ptr == NULL)
    return NULL;

  symbol_name = (char *) ptr;
  /* See PR 20905 for an example of where the strnlen is necessary.  */
  source_dll  = symbol_name + strnlen (symbol_name, size - 1) + 1;

  /* Verify that the strings are null terminated.  */
  if (ptr[size - 1] != 0
      || (bfd_size_type) ((bfd_byte *) source_dll - ptr) >= size)
    {
      _bfd_error_handler
	(_("%pB: string not null terminated in ILF object file"), abfd);
      bfd_set_error (bfd_error_malformed_archive);
      bfd_release (abfd, ptr);
      return NULL;
    }

  /* Now construct the bfd.  */
  if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name,
			    source_dll, ordinal, types))
    {
      bfd_release (abfd, ptr);
      return NULL;
    }

  return _bfd_no_cleanup;
}

static void
pe_bfd_read_buildid (bfd *abfd)
{
  pe_data_type *pe = pe_data (abfd);
  struct internal_extra_pe_aouthdr *extra = &pe->pe_opthdr;
  asection *section;
  bfd_byte *data = 0;
  bfd_size_type dataoff;
  unsigned int i;
  bfd_vma addr = extra->DataDirectory[PE_DEBUG_DATA].VirtualAddress;
  bfd_size_type size = extra->DataDirectory[PE_DEBUG_DATA].Size;

  if (size == 0)
    return;

  addr += extra->ImageBase;

  /* Search for the section containing the DebugDirectory.  */
  for (section = abfd->sections; section != NULL; section = section->next)
    {
      if ((addr >= section->vma) && (addr < (section->vma + section->size)))
	break;
    }

  if (section == NULL)
    return;

  if (!(section->flags & SEC_HAS_CONTENTS))
    return;

  dataoff = addr - section->vma;

  /* PR 20605 and 22373: Make sure that the data is really there.
     Note - since we are dealing with unsigned quantities we have
     to be careful to check for potential overflows.  */
  if (dataoff >= section->size
      || size > section->size - dataoff)
    {
      _bfd_error_handler
	(_("%pB: error: debug data ends beyond end of debug directory"),
	 abfd);
      return;
    }

  /* Read the whole section. */
  if (!bfd_malloc_and_get_section (abfd, section, &data))
    {
      free (data);
      return;
    }

  /* Search for a CodeView entry in the DebugDirectory */
  for (i = 0; i < size / sizeof (struct external_IMAGE_DEBUG_DIRECTORY); i++)
    {
      struct external_IMAGE_DEBUG_DIRECTORY *ext
	= &((struct external_IMAGE_DEBUG_DIRECTORY *)(data + dataoff))[i];
      struct internal_IMAGE_DEBUG_DIRECTORY idd;

      _bfd_XXi_swap_debugdir_in (abfd, ext, &idd);

      if (idd.Type == PE_IMAGE_DEBUG_TYPE_CODEVIEW)
	{
	  char buffer[256 + 1];
	  CODEVIEW_INFO *cvinfo = (CODEVIEW_INFO *) buffer;

	  /*
	    The debug entry doesn't have to have to be in a section, in which
	    case AddressOfRawData is 0, so always use PointerToRawData.
	  */
	  if (_bfd_XXi_slurp_codeview_record (abfd,
					      (file_ptr) idd.PointerToRawData,
					      idd.SizeOfData, cvinfo))
	    {
	      struct bfd_build_id* build_id = bfd_alloc (abfd,
			 sizeof (struct bfd_build_id) + cvinfo->SignatureLength);
	      if (build_id)
		{
		  build_id->size = cvinfo->SignatureLength;
		  memcpy(build_id->data,  cvinfo->Signature,
			 cvinfo->SignatureLength);
		  abfd->build_id = build_id;
		}
	    }
	  break;
	}
    }

  free (data);
}

static bfd_cleanup
pe_bfd_object_p (bfd * abfd)
{
  bfd_byte buffer[6];
  struct external_DOS_hdr dos_hdr;
  struct external_PEI_IMAGE_hdr image_hdr;
  struct internal_filehdr internal_f;
  struct internal_aouthdr internal_a;
  bfd_size_type opt_hdr_size;
  file_ptr offset;
  bfd_cleanup result;

  /* Detect if this a Microsoft Import Library Format element.  */
  /* First read the beginning of the header.  */
  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
      || bfd_bread (buffer, (bfd_size_type) 6, abfd) != 6)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* Then check the magic and the version (only 0 is supported).  */
  if (H_GET_32 (abfd, buffer) == 0xffff0000
      && H_GET_16 (abfd, buffer + 4) == 0)
    return pe_ILF_object_p (abfd);

  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
      || bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd)
	 != sizeof (dos_hdr))
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* There are really two magic numbers involved; the magic number
     that says this is a NT executable (PEI) and the magic number that
     determines the architecture.  The former is IMAGE_DOS_SIGNATURE, stored in
     the e_magic field.  The latter is stored in the f_magic field.
     If the NT magic number isn't valid, the architecture magic number
     could be mimicked by some other field (specifically, the number
     of relocs in section 3).  Since this routine can only be called
     correctly for a PEI file, check the e_magic number here, and, if
     it doesn't match, clobber the f_magic number so that we don't get
     a false match.  */
  if (H_GET_16 (abfd, dos_hdr.e_magic) != IMAGE_DOS_SIGNATURE)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  offset = H_GET_32 (abfd, dos_hdr.e_lfanew);
  if (bfd_seek (abfd, offset, SEEK_SET) != 0
      || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd)
	  != sizeof (image_hdr)))
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (H_GET_32 (abfd, image_hdr.nt_signature) != 0x4550)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* Swap file header, so that we get the location for calling
     real_object_p.  */
  bfd_coff_swap_filehdr_in (abfd, &image_hdr, &internal_f);

  if (! bfd_coff_bad_format_hook (abfd, &internal_f)
      || internal_f.f_opthdr > bfd_coff_aoutsz (abfd))
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  memcpy (internal_f.pe.dos_message, dos_hdr.dos_message,
	  sizeof (internal_f.pe.dos_message));

  /* Read the optional header, which has variable size.  */
  opt_hdr_size = internal_f.f_opthdr;

  if (opt_hdr_size != 0)
    {
      bfd_size_type amt = opt_hdr_size;
      void * opthdr;

      /* PR 17521 file: 230-131433-0.004.  */
      if (amt < sizeof (PEAOUTHDR))
	amt = sizeof (PEAOUTHDR);

      opthdr = _bfd_alloc_and_read (abfd, amt, opt_hdr_size);
      if (opthdr == NULL)
	return NULL;
      if (amt > opt_hdr_size)
	memset (opthdr + opt_hdr_size, 0, amt - opt_hdr_size);

      bfd_set_error (bfd_error_no_error);
      bfd_coff_swap_aouthdr_in (abfd, opthdr, & internal_a);
      if (bfd_get_error () != bfd_error_no_error)
	return NULL;
    }


  result = coff_real_object_p (abfd, internal_f.f_nscns, &internal_f,
			       (opt_hdr_size != 0
				? &internal_a
				: (struct internal_aouthdr *) NULL));


  if (result)
    {
      /* Now the whole header has been processed, see if there is a build-id */
      pe_bfd_read_buildid(abfd);
    }

  return result;
}

#define coff_object_p pe_bfd_object_p
#endif /* COFF_IMAGE_WITH_PE */