llvm.org GIT mirror llvm / release_31 include / llvm / Object / ELF.h
release_31

Tree @release_31 (Download .tar.gz)

ELF.h @release_31

f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2d70e26
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
689ff9c
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2d70e26
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2d70e26
5c2b4ea
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3fd9b84
5c2b4ea
 
 
 
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
f4eff4b
 
2d70e26
 
 
 
 
5c2b4ea
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
2d70e26
 
 
f4eff4b
 
 
 
2d70e26
 
 
 
 
97f7787
 
 
5c2b4ea
2d70e26
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
 
 
2d70e26
 
 
 
dfa1896
f4eff4b
 
 
 
 
5c2b4ea
 
2d70e26
 
f4eff4b
 
 
 
 
 
 
c46255a
f4eff4b
 
 
 
5c2b4ea
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
c68dda8
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
dfa1896
 
5c2b4ea
f4eff4b
 
 
5c2b4ea
 
 
 
 
 
f4eff4b
 
2d70e26
f4eff4b
97f7787
f4eff4b
 
 
 
 
 
 
 
 
6f9489a
 
f4eff4b
 
 
 
2d70e26
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
 
 
 
 
 
f4eff4b
dfa1896
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
f4eff4b
 
 
2d70e26
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2c67727
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
2c67727
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
c46255a
 
f4eff4b
 
 
c46255a
f4eff4b
c46255a
 
f4eff4b
c46255a
 
 
 
 
 
 
 
 
f4eff4b
2c67727
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
c68dda8
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
6f9489a
 
f4eff4b
 
 
dfa1896
5c2b4ea
97f7787
2d70e26
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
 
 
 
f4eff4b
2d70e26
 
f4eff4b
 
 
 
2d70e26
f4eff4b
2d70e26
f4eff4b
 
2d70e26
f4eff4b
2d70e26
dfa1896
 
 
 
 
2d70e26
dfa1896
2d70e26
 
f4eff4b
2d70e26
f4eff4b
2d70e26
5c2b4ea
 
 
 
2d70e26
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
f4eff4b
 
 
 
dfa1896
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
97f7787
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
 
 
 
 
 
f4eff4b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
dfa1896
 
f4eff4b
 
 
 
 
 
 
 
 
 
dfa1896
 
 
 
 
 
 
f4eff4b
 
 
5c2b4ea
2d70e26
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5c2b4ea
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2d70e26
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
f4eff4b
 
 
 
   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
//===- ELF.h - ELF object file implementation -------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the ELFObjectFile template class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_OBJECT_ELF_H
#define LLVM_OBJECT_ELF_H

#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/PointerIntPair.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <limits>
#include <utility>

namespace llvm {
namespace object {

// Subclasses of ELFObjectFile may need this for template instantiation
inline std::pair<unsigned char, unsigned char>
getElfArchType(MemoryBuffer *Object) {
  if (Object->getBufferSize() < ELF::EI_NIDENT)
    return std::make_pair((uint8_t)ELF::ELFCLASSNONE,(uint8_t)ELF::ELFDATANONE);
  return std::make_pair( (uint8_t)Object->getBufferStart()[ELF::EI_CLASS]
                       , (uint8_t)Object->getBufferStart()[ELF::EI_DATA]);
}

// Templates to choose Elf_Addr and Elf_Off depending on is64Bits.
template<support::endianness target_endianness>
struct ELFDataTypeTypedefHelperCommon {
  typedef support::detail::packed_endian_specific_integral
    <uint16_t, target_endianness, support::aligned> Elf_Half;
  typedef support::detail::packed_endian_specific_integral
    <uint32_t, target_endianness, support::aligned> Elf_Word;
  typedef support::detail::packed_endian_specific_integral
    <int32_t, target_endianness, support::aligned> Elf_Sword;
  typedef support::detail::packed_endian_specific_integral
    <uint64_t, target_endianness, support::aligned> Elf_Xword;
  typedef support::detail::packed_endian_specific_integral
    <int64_t, target_endianness, support::aligned> Elf_Sxword;
};

template<support::endianness target_endianness, bool is64Bits>
struct ELFDataTypeTypedefHelper;

/// ELF 32bit types.
template<support::endianness target_endianness>
struct ELFDataTypeTypedefHelper<target_endianness, false>
  : ELFDataTypeTypedefHelperCommon<target_endianness> {
  typedef uint32_t value_type;
  typedef support::detail::packed_endian_specific_integral
    <value_type, target_endianness, support::aligned> Elf_Addr;
  typedef support::detail::packed_endian_specific_integral
    <value_type, target_endianness, support::aligned> Elf_Off;
};

/// ELF 64bit types.
template<support::endianness target_endianness>
struct ELFDataTypeTypedefHelper<target_endianness, true>
  : ELFDataTypeTypedefHelperCommon<target_endianness>{
  typedef uint64_t value_type;
  typedef support::detail::packed_endian_specific_integral
    <value_type, target_endianness, support::aligned> Elf_Addr;
  typedef support::detail::packed_endian_specific_integral
    <value_type, target_endianness, support::aligned> Elf_Off;
};

// I really don't like doing this, but the alternative is copypasta.
#define LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits) \
typedef typename \
  ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Addr Elf_Addr; \
typedef typename \
  ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Off Elf_Off; \
typedef typename \
  ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Half Elf_Half; \
typedef typename \
  ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Word Elf_Word; \
typedef typename \
  ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sword Elf_Sword; \
typedef typename \
  ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Xword Elf_Xword; \
typedef typename \
  ELFDataTypeTypedefHelper<target_endianness, is64Bits>::Elf_Sxword Elf_Sxword;

  // Section header.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Shdr_Base;

template<support::endianness target_endianness>
struct Elf_Shdr_Base<target_endianness, false> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, false)
  Elf_Word sh_name;     // Section name (index into string table)
  Elf_Word sh_type;     // Section type (SHT_*)
  Elf_Word sh_flags;    // Section flags (SHF_*)
  Elf_Addr sh_addr;     // Address where section is to be loaded
  Elf_Off  sh_offset;   // File offset of section data, in bytes
  Elf_Word sh_size;     // Size of section, in bytes
  Elf_Word sh_link;     // Section type-specific header table index link
  Elf_Word sh_info;     // Section type-specific extra information
  Elf_Word sh_addralign;// Section address alignment
  Elf_Word sh_entsize;  // Size of records contained within the section
};

template<support::endianness target_endianness>
struct Elf_Shdr_Base<target_endianness, true> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, true)
  Elf_Word  sh_name;     // Section name (index into string table)
  Elf_Word  sh_type;     // Section type (SHT_*)
  Elf_Xword sh_flags;    // Section flags (SHF_*)
  Elf_Addr  sh_addr;     // Address where section is to be loaded
  Elf_Off   sh_offset;   // File offset of section data, in bytes
  Elf_Xword sh_size;     // Size of section, in bytes
  Elf_Word  sh_link;     // Section type-specific header table index link
  Elf_Word  sh_info;     // Section type-specific extra information
  Elf_Xword sh_addralign;// Section address alignment
  Elf_Xword sh_entsize;  // Size of records contained within the section
};

template<support::endianness target_endianness, bool is64Bits>
struct Elf_Shdr_Impl : Elf_Shdr_Base<target_endianness, is64Bits> {
  using Elf_Shdr_Base<target_endianness, is64Bits>::sh_entsize;
  using Elf_Shdr_Base<target_endianness, is64Bits>::sh_size;

  /// @brief Get the number of entities this section contains if it has any.
  unsigned getEntityCount() const {
    if (sh_entsize == 0)
      return 0;
    return sh_size / sh_entsize;
  }
};

template<support::endianness target_endianness, bool is64Bits>
struct Elf_Sym_Base;

template<support::endianness target_endianness>
struct Elf_Sym_Base<target_endianness, false> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, false)
  Elf_Word      st_name;  // Symbol name (index into string table)
  Elf_Addr      st_value; // Value or address associated with the symbol
  Elf_Word      st_size;  // Size of the symbol
  unsigned char st_info;  // Symbol's type and binding attributes
  unsigned char st_other; // Must be zero; reserved
  Elf_Half      st_shndx; // Which section (header table index) it's defined in
};

template<support::endianness target_endianness>
struct Elf_Sym_Base<target_endianness, true> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, true)
  Elf_Word      st_name;  // Symbol name (index into string table)
  unsigned char st_info;  // Symbol's type and binding attributes
  unsigned char st_other; // Must be zero; reserved
  Elf_Half      st_shndx; // Which section (header table index) it's defined in
  Elf_Addr      st_value; // Value or address associated with the symbol
  Elf_Xword     st_size;  // Size of the symbol
};

template<support::endianness target_endianness, bool is64Bits>
struct Elf_Sym_Impl : Elf_Sym_Base<target_endianness, is64Bits> {
  using Elf_Sym_Base<target_endianness, is64Bits>::st_info;

  // These accessors and mutators correspond to the ELF32_ST_BIND,
  // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
  unsigned char getBinding() const { return st_info >> 4; }
  unsigned char getType() const { return st_info & 0x0f; }
  void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
  void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
  void setBindingAndType(unsigned char b, unsigned char t) {
    st_info = (b << 4) + (t & 0x0f);
  }
};

/// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section
/// (.gnu.version). This structure is identical for ELF32 and ELF64.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Versym_Impl {
  LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
  Elf_Half vs_index;   // Version index with flags (e.g. VERSYM_HIDDEN)
};

template<support::endianness target_endianness, bool is64Bits>
struct Elf_Verdaux_Impl;

/// Elf_Verdef: This is the structure of entries in the SHT_GNU_verdef section
/// (.gnu.version_d). This structure is identical for ELF32 and ELF64.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Verdef_Impl {
  LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
  typedef Elf_Verdaux_Impl<target_endianness, is64Bits> Elf_Verdaux;
  Elf_Half vd_version; // Version of this structure (e.g. VER_DEF_CURRENT)
  Elf_Half vd_flags;   // Bitwise flags (VER_DEF_*)
  Elf_Half vd_ndx;     // Version index, used in .gnu.version entries
  Elf_Half vd_cnt;     // Number of Verdaux entries
  Elf_Word vd_hash;    // Hash of name
  Elf_Word vd_aux;     // Offset to the first Verdaux entry (in bytes)
  Elf_Word vd_next;    // Offset to the next Verdef entry (in bytes)

  /// Get the first Verdaux entry for this Verdef.
  const Elf_Verdaux *getAux() const {
    return reinterpret_cast<const Elf_Verdaux*>((const char*)this + vd_aux);
  }
};

/// Elf_Verdaux: This is the structure of auxilary data in the SHT_GNU_verdef
/// section (.gnu.version_d). This structure is identical for ELF32 and ELF64.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Verdaux_Impl {
  LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
  Elf_Word vda_name; // Version name (offset in string table)
  Elf_Word vda_next; // Offset to next Verdaux entry (in bytes)
};

/// Elf_Verneed: This is the structure of entries in the SHT_GNU_verneed
/// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Verneed_Impl {
  LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
  Elf_Half vn_version; // Version of this structure (e.g. VER_NEED_CURRENT)
  Elf_Half vn_cnt;     // Number of associated Vernaux entries
  Elf_Word vn_file;    // Library name (string table offset)
  Elf_Word vn_aux;     // Offset to first Vernaux entry (in bytes)
  Elf_Word vn_next;    // Offset to next Verneed entry (in bytes)
};

/// Elf_Vernaux: This is the structure of auxiliary data in SHT_GNU_verneed
/// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Vernaux_Impl {
  LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
  Elf_Word vna_hash;  // Hash of dependency name
  Elf_Half vna_flags; // Bitwise Flags (VER_FLAG_*)
  Elf_Half vna_other; // Version index, used in .gnu.version entries
  Elf_Word vna_name;  // Dependency name
  Elf_Word vna_next;  // Offset to next Vernaux entry (in bytes)
};

/// Elf_Dyn_Base: This structure matches the form of entries in the dynamic
///               table section (.dynamic) look like.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Dyn_Base;

template<support::endianness target_endianness>
struct Elf_Dyn_Base<target_endianness, false> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, false)
  Elf_Sword d_tag;
  union {
    Elf_Word d_val;
    Elf_Addr d_ptr;
  } d_un;
};

template<support::endianness target_endianness>
struct Elf_Dyn_Base<target_endianness, true> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, true)
  Elf_Sxword d_tag;
  union {
    Elf_Xword d_val;
    Elf_Addr d_ptr;
  } d_un;
};

/// Elf_Dyn_Impl: This inherits from Elf_Dyn_Base, adding getters and setters.
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Dyn_Impl : Elf_Dyn_Base<target_endianness, is64Bits> {
  using Elf_Dyn_Base<target_endianness, is64Bits>::d_tag;
  using Elf_Dyn_Base<target_endianness, is64Bits>::d_un;
  int64_t getTag() const { return d_tag; }
  uint64_t getVal() const { return d_un.d_val; }
  uint64_t getPtr() const { return d_un.ptr; }
};

template<support::endianness target_endianness, bool is64Bits>
class ELFObjectFile;

// DynRefImpl: Reference to an entry in the dynamic table
// This is an ELF-specific interface.
template<support::endianness target_endianness, bool is64Bits>
class DynRefImpl {
  typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
  typedef ELFObjectFile<target_endianness, is64Bits> OwningType;

  DataRefImpl DynPimpl;
  const OwningType *OwningObject;

public:
  DynRefImpl() : OwningObject(NULL) { }

  DynRefImpl(DataRefImpl DynP, const OwningType *Owner);

  bool operator==(const DynRefImpl &Other) const;
  bool operator <(const DynRefImpl &Other) const;

  error_code getNext(DynRefImpl &Result) const;
  int64_t getTag() const;
  uint64_t getVal() const;
  uint64_t getPtr() const;

  DataRefImpl getRawDataRefImpl() const;
};

// Elf_Rel: Elf Relocation
template<support::endianness target_endianness, bool is64Bits, bool isRela>
struct Elf_Rel_Base;

template<support::endianness target_endianness>
struct Elf_Rel_Base<target_endianness, false, false> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, false)
  Elf_Addr      r_offset; // Location (file byte offset, or program virtual addr)
  Elf_Word      r_info;  // Symbol table index and type of relocation to apply
};

template<support::endianness target_endianness>
struct Elf_Rel_Base<target_endianness, true, false> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, true)
  Elf_Addr      r_offset; // Location (file byte offset, or program virtual addr)
  Elf_Xword     r_info;   // Symbol table index and type of relocation to apply
};

template<support::endianness target_endianness>
struct Elf_Rel_Base<target_endianness, false, true> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, false)
  Elf_Addr      r_offset; // Location (file byte offset, or program virtual addr)
  Elf_Word      r_info;   // Symbol table index and type of relocation to apply
  Elf_Sword     r_addend; // Compute value for relocatable field by adding this
};

template<support::endianness target_endianness>
struct Elf_Rel_Base<target_endianness, true, true> {
  LLVM_ELF_IMPORT_TYPES(target_endianness, true)
  Elf_Addr      r_offset; // Location (file byte offset, or program virtual addr)
  Elf_Xword     r_info;   // Symbol table index and type of relocation to apply
  Elf_Sxword    r_addend; // Compute value for relocatable field by adding this.
};

template<support::endianness target_endianness, bool is64Bits, bool isRela>
struct Elf_Rel_Impl;

template<support::endianness target_endianness, bool isRela>
struct Elf_Rel_Impl<target_endianness, true, isRela>
       : Elf_Rel_Base<target_endianness, true, isRela> {
  using Elf_Rel_Base<target_endianness, true, isRela>::r_info;
  LLVM_ELF_IMPORT_TYPES(target_endianness, true)

  // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
  // and ELF64_R_INFO macros defined in the ELF specification:
  uint64_t getSymbol() const { return (r_info >> 32); }
  unsigned char getType() const {
    return (unsigned char) (r_info & 0xffffffffL);
  }
  void setSymbol(uint64_t s) { setSymbolAndType(s, getType()); }
  void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
  void setSymbolAndType(uint64_t s, unsigned char t) {
    r_info = (s << 32) + (t&0xffffffffL);
  }
};

template<support::endianness target_endianness, bool isRela>
struct Elf_Rel_Impl<target_endianness, false, isRela>
       : Elf_Rel_Base<target_endianness, false, isRela> {
  using Elf_Rel_Base<target_endianness, false, isRela>::r_info;
  LLVM_ELF_IMPORT_TYPES(target_endianness, false)

  // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
  // and ELF32_R_INFO macros defined in the ELF specification:
  uint32_t getSymbol() const { return (r_info >> 8); }
  unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
  void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); }
  void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
  void setSymbolAndType(uint32_t s, unsigned char t) {
    r_info = (s << 8) + t;
  }
};


template<support::endianness target_endianness, bool is64Bits>
class ELFObjectFile : public ObjectFile {
  LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)

  typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
  typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
  typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
  typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
  typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
  typedef Elf_Verdef_Impl<target_endianness, is64Bits> Elf_Verdef;
  typedef Elf_Verdaux_Impl<target_endianness, is64Bits> Elf_Verdaux;
  typedef Elf_Verneed_Impl<target_endianness, is64Bits> Elf_Verneed;
  typedef Elf_Vernaux_Impl<target_endianness, is64Bits> Elf_Vernaux;
  typedef Elf_Versym_Impl<target_endianness, is64Bits> Elf_Versym;
  typedef DynRefImpl<target_endianness, is64Bits> DynRef;
  typedef content_iterator<DynRef> dyn_iterator;

protected:
  struct Elf_Ehdr {
    unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
    Elf_Half e_type;     // Type of file (see ET_*)
    Elf_Half e_machine;  // Required architecture for this file (see EM_*)
    Elf_Word e_version;  // Must be equal to 1
    Elf_Addr e_entry;    // Address to jump to in order to start program
    Elf_Off  e_phoff;    // Program header table's file offset, in bytes
    Elf_Off  e_shoff;    // Section header table's file offset, in bytes
    Elf_Word e_flags;    // Processor-specific flags
    Elf_Half e_ehsize;   // Size of ELF header, in bytes
    Elf_Half e_phentsize;// Size of an entry in the program header table
    Elf_Half e_phnum;    // Number of entries in the program header table
    Elf_Half e_shentsize;// Size of an entry in the section header table
    Elf_Half e_shnum;    // Number of entries in the section header table
    Elf_Half e_shstrndx; // Section header table index of section name
                                  // string table
    bool checkMagic() const {
      return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
    }
    unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
    unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
  };
  // This flag is used for classof, to distinguish ELFObjectFile from
  // its subclass. If more subclasses will be created, this flag will
  // have to become an enum.
  bool isDyldELFObject;

private:
  typedef SmallVector<const Elf_Shdr*, 1> Sections_t;
  typedef DenseMap<unsigned, unsigned> IndexMap_t;
  typedef DenseMap<const Elf_Shdr*, SmallVector<uint32_t, 1> > RelocMap_t;

  const Elf_Ehdr *Header;
  const Elf_Shdr *SectionHeaderTable;
  const Elf_Shdr *dot_shstrtab_sec; // Section header string table.
  const Elf_Shdr *dot_strtab_sec;   // Symbol header string table.
  const Elf_Shdr *dot_dynstr_sec;   // Dynamic symbol string table.

  // SymbolTableSections[0] always points to the dynamic string table section
  // header, or NULL if there is no dynamic string table.
  Sections_t SymbolTableSections;
  IndexMap_t SymbolTableSectionsIndexMap;
  DenseMap<const Elf_Sym*, ELF::Elf64_Word> ExtendedSymbolTable;

  const Elf_Shdr *dot_dynamic_sec;       // .dynamic
  const Elf_Shdr *dot_gnu_version_sec;   // .gnu.version
  const Elf_Shdr *dot_gnu_version_r_sec; // .gnu.version_r
  const Elf_Shdr *dot_gnu_version_d_sec; // .gnu.version_d

  // Pointer to SONAME entry in dynamic string table
  // This is set the first time getLoadName is called.
  mutable const char *dt_soname;

  // Records for each version index the corresponding Verdef or Vernaux entry.
  // This is filled the first time LoadVersionMap() is called.
  class VersionMapEntry : public PointerIntPair<const void*, 1> {
    public:
    // If the integer is 0, this is an Elf_Verdef*.
    // If the integer is 1, this is an Elf_Vernaux*.
    VersionMapEntry() : PointerIntPair<const void*, 1>(NULL, 0) { }
    VersionMapEntry(const Elf_Verdef *verdef)
        : PointerIntPair<const void*, 1>(verdef, 0) { }
    VersionMapEntry(const Elf_Vernaux *vernaux)
        : PointerIntPair<const void*, 1>(vernaux, 1) { }
    bool isNull() const { return getPointer() == NULL; }
    bool isVerdef() const { return !isNull() && getInt() == 0; }
    bool isVernaux() const { return !isNull() && getInt() == 1; }
    const Elf_Verdef *getVerdef() const {
      return isVerdef() ? (const Elf_Verdef*)getPointer() : NULL;
    }
    const Elf_Vernaux *getVernaux() const {
      return isVernaux() ? (const Elf_Vernaux*)getPointer() : NULL;
    }
  };
  mutable SmallVector<VersionMapEntry, 16> VersionMap;
  void LoadVersionDefs(const Elf_Shdr *sec) const;
  void LoadVersionNeeds(const Elf_Shdr *ec) const;
  void LoadVersionMap() const;

  /// @brief Map sections to an array of relocation sections that reference
  ///        them sorted by section index.
  RelocMap_t SectionRelocMap;

  /// @brief Get the relocation section that contains \a Rel.
  const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
    return getSection(Rel.w.b);
  }

  bool            isRelocationHasAddend(DataRefImpl Rel) const;
  template<typename T>
  const T        *getEntry(uint16_t Section, uint32_t Entry) const;
  template<typename T>
  const T        *getEntry(const Elf_Shdr *Section, uint32_t Entry) const;
  const Elf_Shdr *getSection(DataRefImpl index) const;
  const Elf_Shdr *getSection(uint32_t index) const;
  const Elf_Rel  *getRel(DataRefImpl Rel) const;
  const Elf_Rela *getRela(DataRefImpl Rela) const;
  const char     *getString(uint32_t section, uint32_t offset) const;
  const char     *getString(const Elf_Shdr *section, uint32_t offset) const;
  error_code      getSymbolName(const Elf_Shdr *section,
                                const Elf_Sym *Symb,
                                StringRef &Res) const;
  error_code      getSymbolVersion(const Elf_Shdr *section,
                                   const Elf_Sym *Symb,
                                   StringRef &Version,
                                   bool &IsDefault) const;
  void VerifyStrTab(const Elf_Shdr *sh) const;

protected:
  const Elf_Sym  *getSymbol(DataRefImpl Symb) const; // FIXME: Should be private?
  void            validateSymbol(DataRefImpl Symb) const;

public:
  const Elf_Dyn  *getDyn(DataRefImpl DynData) const;
  error_code getSymbolVersion(SymbolRef Symb, StringRef &Version,
                              bool &IsDefault) const;
protected:
  virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
  virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
  virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
  virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
  virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
  virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
  virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
  virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
  virtual error_code getSymbolSection(DataRefImpl Symb,
                                      section_iterator &Res) const;

  friend class DynRefImpl<target_endianness, is64Bits>;
  virtual error_code getDynNext(DataRefImpl DynData, DynRef &Result) const;

  virtual error_code getLibraryNext(DataRefImpl Data, LibraryRef &Result) const;
  virtual error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const;

  virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
  virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
  virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
  virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
  virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
  virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
  virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
  virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
  virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
  virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
                                                   bool &Res) const;
  virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
  virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
  virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
                                           bool &Result) const;
  virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
  virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;

  virtual error_code getRelocationNext(DataRefImpl Rel,
                                       RelocationRef &Res) const;
  virtual error_code getRelocationAddress(DataRefImpl Rel,
                                          uint64_t &Res) const;
  virtual error_code getRelocationOffset(DataRefImpl Rel,
                                         uint64_t &Res) const;
  virtual error_code getRelocationSymbol(DataRefImpl Rel,
                                         SymbolRef &Res) const;
  virtual error_code getRelocationType(DataRefImpl Rel,
                                       uint64_t &Res) const;
  virtual error_code getRelocationTypeName(DataRefImpl Rel,
                                           SmallVectorImpl<char> &Result) const;
  virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
                                                 int64_t &Res) const;
  virtual error_code getRelocationValueString(DataRefImpl Rel,
                                           SmallVectorImpl<char> &Result) const;

public:
  ELFObjectFile(MemoryBuffer *Object, error_code &ec);
  virtual symbol_iterator begin_symbols() const;
  virtual symbol_iterator end_symbols() const;

  virtual symbol_iterator begin_dynamic_symbols() const;
  virtual symbol_iterator end_dynamic_symbols() const;

  virtual section_iterator begin_sections() const;
  virtual section_iterator end_sections() const;

  virtual library_iterator begin_libraries_needed() const;
  virtual library_iterator end_libraries_needed() const;

  virtual dyn_iterator begin_dynamic_table() const;
  virtual dyn_iterator end_dynamic_table() const;

  virtual uint8_t getBytesInAddress() const;
  virtual StringRef getFileFormatName() const;
  virtual StringRef getObjectType() const { return "ELF"; }
  virtual unsigned getArch() const;
  virtual StringRef getLoadName() const;

  uint64_t getNumSections() const;
  uint64_t getStringTableIndex() const;
  ELF::Elf64_Word getSymbolTableIndex(const Elf_Sym *symb) const;
  const Elf_Shdr *getSection(const Elf_Sym *symb) const;

  // Methods for type inquiry through isa, cast, and dyn_cast
  bool isDyldType() const { return isDyldELFObject; }
  static inline bool classof(const Binary *v) {
    return v->getType() == getELFType(target_endianness == support::little,
                                      is64Bits);
  }
  static inline bool classof(const ELFObjectFile *v) { return true; }
};

// Iterate through the version definitions, and place each Elf_Verdef
// in the VersionMap according to its index.
template<support::endianness target_endianness, bool is64Bits>
void ELFObjectFile<target_endianness, is64Bits>::
                  LoadVersionDefs(const Elf_Shdr *sec) const {
  unsigned vd_size = sec->sh_size; // Size of section in bytes
  unsigned vd_count = sec->sh_info; // Number of Verdef entries
  const char *sec_start = (const char*)base() + sec->sh_offset;
  const char *sec_end = sec_start + vd_size;
  // The first Verdef entry is at the start of the section.
  const char *p = sec_start;
  for (unsigned i = 0; i < vd_count; i++) {
    if (p + sizeof(Elf_Verdef) > sec_end)
      report_fatal_error("Section ended unexpectedly while scanning "
                         "version definitions.");
    const Elf_Verdef *vd = reinterpret_cast<const Elf_Verdef *>(p);
    if (vd->vd_version != ELF::VER_DEF_CURRENT)
      report_fatal_error("Unexpected verdef version");
    size_t index = vd->vd_ndx & ELF::VERSYM_VERSION;
    if (index >= VersionMap.size())
      VersionMap.resize(index+1);
    VersionMap[index] = VersionMapEntry(vd);
    p += vd->vd_next;
  }
}

// Iterate through the versions needed section, and place each Elf_Vernaux
// in the VersionMap according to its index.
template<support::endianness target_endianness, bool is64Bits>
void ELFObjectFile<target_endianness, is64Bits>::
                  LoadVersionNeeds(const Elf_Shdr *sec) const {
  unsigned vn_size = sec->sh_size; // Size of section in bytes
  unsigned vn_count = sec->sh_info; // Number of Verneed entries
  const char *sec_start = (const char*)base() + sec->sh_offset;
  const char *sec_end = sec_start + vn_size;
  // The first Verneed entry is at the start of the section.
  const char *p = sec_start;
  for (unsigned i = 0; i < vn_count; i++) {
    if (p + sizeof(Elf_Verneed) > sec_end)
      report_fatal_error("Section ended unexpectedly while scanning "
                         "version needed records.");
    const Elf_Verneed *vn = reinterpret_cast<const Elf_Verneed *>(p);
    if (vn->vn_version != ELF::VER_NEED_CURRENT)
      report_fatal_error("Unexpected verneed version");
    // Iterate through the Vernaux entries
    const char *paux = p + vn->vn_aux;
    for (unsigned j = 0; j < vn->vn_cnt; j++) {
      if (paux + sizeof(Elf_Vernaux) > sec_end)
        report_fatal_error("Section ended unexpected while scanning auxiliary "
                           "version needed records.");
      const Elf_Vernaux *vna = reinterpret_cast<const Elf_Vernaux *>(paux);
      size_t index = vna->vna_other & ELF::VERSYM_VERSION;
      if (index >= VersionMap.size())
        VersionMap.resize(index+1);
      VersionMap[index] = VersionMapEntry(vna);
      paux += vna->vna_next;
    }
    p += vn->vn_next;
  }
}

template<support::endianness target_endianness, bool is64Bits>
void ELFObjectFile<target_endianness, is64Bits>::LoadVersionMap() const {
  // If there is no dynamic symtab or version table, there is nothing to do.
  if (SymbolTableSections[0] == NULL || dot_gnu_version_sec == NULL)
    return;

  // Has the VersionMap already been loaded?
  if (VersionMap.size() > 0)
    return;

  // The first two version indexes are reserved.
  // Index 0 is LOCAL, index 1 is GLOBAL.
  VersionMap.push_back(VersionMapEntry());
  VersionMap.push_back(VersionMapEntry());

  if (dot_gnu_version_d_sec)
    LoadVersionDefs(dot_gnu_version_d_sec);

  if (dot_gnu_version_r_sec)
    LoadVersionNeeds(dot_gnu_version_r_sec);
}

template<support::endianness target_endianness, bool is64Bits>
void ELFObjectFile<target_endianness, is64Bits>
                  ::validateSymbol(DataRefImpl Symb) const {
  const Elf_Sym  *symb = getSymbol(Symb);
  const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];
  // FIXME: We really need to do proper error handling in the case of an invalid
  //        input file. Because we don't use exceptions, I think we'll just pass
  //        an error object around.
  if (!(  symb
        && SymbolTableSection
        && symb >= (const Elf_Sym*)(base()
                   + SymbolTableSection->sh_offset)
        && symb <  (const Elf_Sym*)(base()
                   + SymbolTableSection->sh_offset
                   + SymbolTableSection->sh_size)))
    // FIXME: Proper error handling.
    report_fatal_error("Symb must point to a valid symbol!");
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolNext(DataRefImpl Symb,
                                        SymbolRef &Result) const {
  validateSymbol(Symb);
  const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b];

  ++Symb.d.a;
  // Check to see if we are at the end of this symbol table.
  if (Symb.d.a >= SymbolTableSection->getEntityCount()) {
    // We are at the end. If there are other symbol tables, jump to them.
    // If the symbol table is .dynsym, we are iterating dynamic symbols,
    // and there is only one table of these.
    if (Symb.d.b != 0) {
      ++Symb.d.b;
      Symb.d.a = 1; // The 0th symbol in ELF is fake.
    }
    // Otherwise return the terminator.
    if (Symb.d.b == 0 || Symb.d.b >= SymbolTableSections.size()) {
      Symb.d.a = std::numeric_limits<uint32_t>::max();
      Symb.d.b = std::numeric_limits<uint32_t>::max();
    }
  }

  Result = SymbolRef(Symb, this);
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolName(DataRefImpl Symb,
                                        StringRef &Result) const {
  validateSymbol(Symb);
  const Elf_Sym *symb = getSymbol(Symb);
  return getSymbolName(SymbolTableSections[Symb.d.b], symb, Result);
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolVersion(SymbolRef SymRef,
                                           StringRef &Version,
                                           bool &IsDefault) const {
  DataRefImpl Symb = SymRef.getRawDataRefImpl();
  validateSymbol(Symb);
  const Elf_Sym *symb = getSymbol(Symb);
  return getSymbolVersion(SymbolTableSections[Symb.d.b], symb,
                          Version, IsDefault);
}

template<support::endianness target_endianness, bool is64Bits>
ELF::Elf64_Word ELFObjectFile<target_endianness, is64Bits>
                      ::getSymbolTableIndex(const Elf_Sym *symb) const {
  if (symb->st_shndx == ELF::SHN_XINDEX)
    return ExtendedSymbolTable.lookup(symb);
  return symb->st_shndx;
}

template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
ELFObjectFile<target_endianness, is64Bits>
                             ::getSection(const Elf_Sym *symb) const {
  if (symb->st_shndx == ELF::SHN_XINDEX)
    return getSection(ExtendedSymbolTable.lookup(symb));
  if (symb->st_shndx >= ELF::SHN_LORESERVE)
    return 0;
  return getSection(symb->st_shndx);
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolFileOffset(DataRefImpl Symb,
                                          uint64_t &Result) const {
  validateSymbol(Symb);
  const Elf_Sym  *symb = getSymbol(Symb);
  const Elf_Shdr *Section;
  switch (getSymbolTableIndex(symb)) {
  case ELF::SHN_COMMON:
   // Unintialized symbols have no offset in the object file
  case ELF::SHN_UNDEF:
    Result = UnknownAddressOrSize;
    return object_error::success;
  case ELF::SHN_ABS:
    Result = symb->st_value;
    return object_error::success;
  default: Section = getSection(symb);
  }

  switch (symb->getType()) {
  case ELF::STT_SECTION:
    Result = Section ? Section->sh_addr : UnknownAddressOrSize;
    return object_error::success;
  case ELF::STT_FUNC:
  case ELF::STT_OBJECT:
  case ELF::STT_NOTYPE:
    Result = symb->st_value +
             (Section ? Section->sh_offset : 0);
    return object_error::success;
  default:
    Result = UnknownAddressOrSize;
    return object_error::success;
  }
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolAddress(DataRefImpl Symb,
                                           uint64_t &Result) const {
  validateSymbol(Symb);
  const Elf_Sym  *symb = getSymbol(Symb);
  const Elf_Shdr *Section;
  switch (getSymbolTableIndex(symb)) {
  case ELF::SHN_COMMON:
  case ELF::SHN_UNDEF:
    Result = UnknownAddressOrSize;
    return object_error::success;
  case ELF::SHN_ABS:
    Result = symb->st_value;
    return object_error::success;
  default: Section = getSection(symb);
  }

  switch (symb->getType()) {
  case ELF::STT_SECTION:
    Result = Section ? Section->sh_addr : UnknownAddressOrSize;
    return object_error::success;
  case ELF::STT_FUNC:
  case ELF::STT_OBJECT:
  case ELF::STT_NOTYPE:
    Result = symb->st_value + (Section ? Section->sh_addr : 0);
    return object_error::success;
  default:
    Result = UnknownAddressOrSize;
    return object_error::success;
  }
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolSize(DataRefImpl Symb,
                                        uint64_t &Result) const {
  validateSymbol(Symb);
  const Elf_Sym  *symb = getSymbol(Symb);
  if (symb->st_size == 0)
    Result = UnknownAddressOrSize;
  Result = symb->st_size;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolNMTypeChar(DataRefImpl Symb,
                                              char &Result) const {
  validateSymbol(Symb);
  const Elf_Sym  *symb = getSymbol(Symb);
  const Elf_Shdr *Section = getSection(symb);

  char ret = '?';

  if (Section) {
    switch (Section->sh_type) {
    case ELF::SHT_PROGBITS:
    case ELF::SHT_DYNAMIC:
      switch (Section->sh_flags) {
      case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
        ret = 't'; break;
      case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
        ret = 'd'; break;
      case ELF::SHF_ALLOC:
      case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
      case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
        ret = 'r'; break;
      }
      break;
    case ELF::SHT_NOBITS: ret = 'b';
    }
  }

  switch (getSymbolTableIndex(symb)) {
  case ELF::SHN_UNDEF:
    if (ret == '?')
      ret = 'U';
    break;
  case ELF::SHN_ABS: ret = 'a'; break;
  case ELF::SHN_COMMON: ret = 'c'; break;
  }

  switch (symb->getBinding()) {
  case ELF::STB_GLOBAL: ret = ::toupper(ret); break;
  case ELF::STB_WEAK:
    if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
      ret = 'w';
    else
      if (symb->getType() == ELF::STT_OBJECT)
        ret = 'V';
      else
        ret = 'W';
  }

  if (ret == '?' && symb->getType() == ELF::STT_SECTION) {
    StringRef name;
    if (error_code ec = getSymbolName(Symb, name))
      return ec;
    Result = StringSwitch<char>(name)
      .StartsWith(".debug", 'N')
      .StartsWith(".note", 'n')
      .Default('?');
    return object_error::success;
  }

  Result = ret;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolType(DataRefImpl Symb,
                                        SymbolRef::Type &Result) const {
  validateSymbol(Symb);
  const Elf_Sym  *symb = getSymbol(Symb);

  switch (symb->getType()) {
  case ELF::STT_NOTYPE:
    Result = SymbolRef::ST_Unknown;
    break;
  case ELF::STT_SECTION:
    Result = SymbolRef::ST_Debug;
    break;
  case ELF::STT_FILE:
    Result = SymbolRef::ST_File;
    break;
  case ELF::STT_FUNC:
    Result = SymbolRef::ST_Function;
    break;
  case ELF::STT_OBJECT:
  case ELF::STT_COMMON:
  case ELF::STT_TLS:
    Result = SymbolRef::ST_Data;
    break;
  default:
    Result = SymbolRef::ST_Other;
    break;
  }
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolFlags(DataRefImpl Symb,
                                         uint32_t &Result) const {
  validateSymbol(Symb);
  const Elf_Sym  *symb = getSymbol(Symb);

  Result = SymbolRef::SF_None;

  if (symb->getBinding() != ELF::STB_LOCAL)
    Result |= SymbolRef::SF_Global;

  if (symb->getBinding() == ELF::STB_WEAK)
    Result |= SymbolRef::SF_Weak;

  if (symb->st_shndx == ELF::SHN_ABS)
    Result |= SymbolRef::SF_Absolute;

  if (symb->getType() == ELF::STT_FILE ||
      symb->getType() == ELF::STT_SECTION)
    Result |= SymbolRef::SF_FormatSpecific;

  if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF)
    Result |= SymbolRef::SF_Undefined;

  if (symb->getType() == ELF::STT_COMMON ||
      getSymbolTableIndex(symb) == ELF::SHN_COMMON)
    Result |= SymbolRef::SF_Common;

  if (symb->getType() == ELF::STT_TLS)
    Result |= SymbolRef::SF_ThreadLocal;

  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolSection(DataRefImpl Symb,
                                           section_iterator &Res) const {
  validateSymbol(Symb);
  const Elf_Sym  *symb = getSymbol(Symb);
  const Elf_Shdr *sec = getSection(symb);
  if (!sec)
    Res = end_sections();
  else {
    DataRefImpl Sec;
    Sec.p = reinterpret_cast<intptr_t>(sec);
    Res = section_iterator(SectionRef(Sec, this));
  }
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSectionNext(DataRefImpl Sec, SectionRef &Result) const {
  const uint8_t *sec = reinterpret_cast<const uint8_t *>(Sec.p);
  sec += Header->e_shentsize;
  Sec.p = reinterpret_cast<intptr_t>(sec);
  Result = SectionRef(Sec, this);
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSectionName(DataRefImpl Sec,
                                         StringRef &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  Result = StringRef(getString(dot_shstrtab_sec, sec->sh_name));
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSectionAddress(DataRefImpl Sec,
                                            uint64_t &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  Result = sec->sh_addr;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSectionSize(DataRefImpl Sec,
                                         uint64_t &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  Result = sec->sh_size;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSectionContents(DataRefImpl Sec,
                                             StringRef &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  const char *start = (const char*)base() + sec->sh_offset;
  Result = StringRef(start, sec->sh_size);
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSectionAlignment(DataRefImpl Sec,
                                              uint64_t &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  Result = sec->sh_addralign;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::isSectionText(DataRefImpl Sec,
                                        bool &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  if (sec->sh_flags & ELF::SHF_EXECINSTR)
    Result = true;
  else
    Result = false;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::isSectionData(DataRefImpl Sec,
                                        bool &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
      && sec->sh_type == ELF::SHT_PROGBITS)
    Result = true;
  else
    Result = false;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::isSectionBSS(DataRefImpl Sec,
                                       bool &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE)
      && sec->sh_type == ELF::SHT_NOBITS)
    Result = true;
  else
    Result = false;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::isSectionRequiredForExecution(DataRefImpl Sec,
                                                        bool &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  if (sec->sh_flags & ELF::SHF_ALLOC)
    Result = true;
  else
    Result = false;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::isSectionVirtual(DataRefImpl Sec,
                                           bool &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  if (sec->sh_type == ELF::SHT_NOBITS)
    Result = true;
  else
    Result = false;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>::isSectionZeroInit(DataRefImpl Sec,
                                            bool &Result) const {
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  // For ELF, all zero-init sections are virtual (that is, they occupy no space
  //   in the object image) and vice versa.
  if (sec->sh_flags & ELF::SHT_NOBITS)
    Result = true;
  else
    Result = false;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                          ::sectionContainsSymbol(DataRefImpl Sec,
                                                  DataRefImpl Symb,
                                                  bool &Result) const {
  // FIXME: Unimplemented.
  Result = false;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
relocation_iterator ELFObjectFile<target_endianness, is64Bits>
                                 ::getSectionRelBegin(DataRefImpl Sec) const {
  DataRefImpl RelData;
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
  if (sec != 0 && ittr != SectionRelocMap.end()) {
    RelData.w.a = getSection(ittr->second[0])->sh_info;
    RelData.w.b = ittr->second[0];
    RelData.w.c = 0;
  }
  return relocation_iterator(RelocationRef(RelData, this));
}

template<support::endianness target_endianness, bool is64Bits>
relocation_iterator ELFObjectFile<target_endianness, is64Bits>
                                 ::getSectionRelEnd(DataRefImpl Sec) const {
  DataRefImpl RelData;
  const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p);
  typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec);
  if (sec != 0 && ittr != SectionRelocMap.end()) {
    // Get the index of the last relocation section for this section.
    std::size_t relocsecindex = ittr->second[ittr->second.size() - 1];
    const Elf_Shdr *relocsec = getSection(relocsecindex);
    RelData.w.a = relocsec->sh_info;
    RelData.w.b = relocsecindex;
    RelData.w.c = relocsec->sh_size / relocsec->sh_entsize;
  }
  return relocation_iterator(RelocationRef(RelData, this));
}

// Relocations
template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationNext(DataRefImpl Rel,
                                            RelocationRef &Result) const {
  ++Rel.w.c;
  const Elf_Shdr *relocsec = getSection(Rel.w.b);
  if (Rel.w.c >= (relocsec->sh_size / relocsec->sh_entsize)) {
    // We have reached the end of the relocations for this section. See if there
    // is another relocation section.
    typename RelocMap_t::mapped_type relocseclist =
      SectionRelocMap.lookup(getSection(Rel.w.a));

    // Do a binary search for the current reloc section index (which must be
    // present). Then get the next one.
    typename RelocMap_t::mapped_type::const_iterator loc =
      std::lower_bound(relocseclist.begin(), relocseclist.end(), Rel.w.b);
    ++loc;

    // If there is no next one, don't do anything. The ++Rel.w.c above sets Rel
    // to the end iterator.
    if (loc != relocseclist.end()) {
      Rel.w.b = *loc;
      Rel.w.a = 0;
    }
  }
  Result = RelocationRef(Rel, this);
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationSymbol(DataRefImpl Rel,
                                              SymbolRef &Result) const {
  uint32_t symbolIdx;
  const Elf_Shdr *sec = getSection(Rel.w.b);
  switch (sec->sh_type) {
    default :
      report_fatal_error("Invalid section type in Rel!");
    case ELF::SHT_REL : {
      symbolIdx = getRel(Rel)->getSymbol();
      break;
    }
    case ELF::SHT_RELA : {
      symbolIdx = getRela(Rel)->getSymbol();
      break;
    }
  }
  DataRefImpl SymbolData;
  IndexMap_t::const_iterator it = SymbolTableSectionsIndexMap.find(sec->sh_link);
  if (it == SymbolTableSectionsIndexMap.end())
    report_fatal_error("Relocation symbol table not found!");
  SymbolData.d.a = symbolIdx;
  SymbolData.d.b = it->second;
  Result = SymbolRef(SymbolData, this);
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationAddress(DataRefImpl Rel,
                                               uint64_t &Result) const {
  uint64_t offset;
  const Elf_Shdr *sec = getSection(Rel.w.b);
  switch (sec->sh_type) {
    default :
      report_fatal_error("Invalid section type in Rel!");
    case ELF::SHT_REL : {
      offset = getRel(Rel)->r_offset;
      break;
    }
    case ELF::SHT_RELA : {
      offset = getRela(Rel)->r_offset;
      break;
    }
  }

  Result = offset;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationOffset(DataRefImpl Rel,
                                              uint64_t &Result) const {
  uint64_t offset;
  const Elf_Shdr *sec = getSection(Rel.w.b);
  switch (sec->sh_type) {
    default :
      report_fatal_error("Invalid section type in Rel!");
    case ELF::SHT_REL : {
      offset = getRel(Rel)->r_offset;
      break;
    }
    case ELF::SHT_RELA : {
      offset = getRela(Rel)->r_offset;
      break;
    }
  }

  Result = offset - sec->sh_addr;
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationType(DataRefImpl Rel,
                                            uint64_t &Result) const {
  const Elf_Shdr *sec = getSection(Rel.w.b);
  switch (sec->sh_type) {
    default :
      report_fatal_error("Invalid section type in Rel!");
    case ELF::SHT_REL : {
      Result = getRel(Rel)->getType();
      break;
    }
    case ELF::SHT_RELA : {
      Result = getRela(Rel)->getType();
      break;
    }
  }
  return object_error::success;
}

#define LLVM_ELF_SWITCH_RELOC_TYPE_NAME(enum) \
  case ELF::enum: res = #enum; break;

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationTypeName(DataRefImpl Rel,
                                          SmallVectorImpl<char> &Result) const {
  const Elf_Shdr *sec = getSection(Rel.w.b);
  uint8_t type;
  StringRef res;
  switch (sec->sh_type) {
    default :
      return object_error::parse_failed;
    case ELF::SHT_REL : {
      type = getRel(Rel)->getType();
      break;
    }
    case ELF::SHT_RELA : {
      type = getRela(Rel)->getType();
      break;
    }
  }
  switch (Header->e_machine) {
  case ELF::EM_X86_64:
    switch (type) {
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_NONE);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_64);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOT32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PLT32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_COPY);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GLOB_DAT);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_JUMP_SLOT);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_RELATIVE);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPCREL);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32S);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_16);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC16);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_8);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC8);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPMOD64);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF64);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF64);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSGD);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSLD);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTTPOFF);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC64);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTOFF64);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE64);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32_TLSDESC);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC_CALL);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC);
    default:
      res = "Unknown";
    }
    break;
  case ELF::EM_386:
    switch (type) {
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_NONE);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOT32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PLT32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_COPY);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GLOB_DAT);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_JUMP_SLOT);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_RELATIVE);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTOFF);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTPC);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32PLT);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTIE);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_16);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC16);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_8);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC8);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_PUSH);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_CALL);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_POP);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_PUSH);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_CALL);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_POP);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDO_32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE_32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE_32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPMOD32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPOFF32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF32);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTDESC);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC_CALL);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC);
      LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_IRELATIVE);
    default:
      res = "Unknown";
    }
    break;
  default:
    res = "Unknown";
  }
  Result.append(res.begin(), res.end());
  return object_error::success;
}

#undef LLVM_ELF_SWITCH_RELOC_TYPE_NAME

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationAdditionalInfo(DataRefImpl Rel,
                                                      int64_t &Result) const {
  const Elf_Shdr *sec = getSection(Rel.w.b);
  switch (sec->sh_type) {
    default :
      report_fatal_error("Invalid section type in Rel!");
    case ELF::SHT_REL : {
      Result = 0;
      return object_error::success;
    }
    case ELF::SHT_RELA : {
      Result = getRela(Rel)->r_addend;
      return object_error::success;
    }
  }
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getRelocationValueString(DataRefImpl Rel,
                                          SmallVectorImpl<char> &Result) const {
  const Elf_Shdr *sec = getSection(Rel.w.b);
  uint8_t type;
  StringRef res;
  int64_t addend = 0;
  uint16_t symbol_index = 0;
  switch (sec->sh_type) {
    default :
      return object_error::parse_failed;
    case ELF::SHT_REL : {
      type = getRel(Rel)->getType();
      symbol_index = getRel(Rel)->getSymbol();
      // TODO: Read implicit addend from section data.
      break;
    }
    case ELF::SHT_RELA : {
      type = getRela(Rel)->getType();
      symbol_index = getRela(Rel)->getSymbol();
      addend = getRela(Rel)->r_addend;
      break;
    }
  }
  const Elf_Sym *symb = getEntry<Elf_Sym>(sec->sh_link, symbol_index);
  StringRef symname;
  if (error_code ec = getSymbolName(getSection(sec->sh_link), symb, symname))
    return ec;
  switch (Header->e_machine) {
  case ELF::EM_X86_64:
    switch (type) {
    case ELF::R_X86_64_32S:
      res = symname;
      break;
    case ELF::R_X86_64_PC32: {
        std::string fmtbuf;
        raw_string_ostream fmt(fmtbuf);
        fmt << symname << (addend < 0 ? "" : "+") << addend << "-P";
        fmt.flush();
        Result.append(fmtbuf.begin(), fmtbuf.end());
      }
      break;
    default:
      res = "Unknown";
    }
    break;
  default:
    res = "Unknown";
  }
  if (Result.empty())
    Result.append(res.begin(), res.end());
  return object_error::success;
}

// Verify that the last byte in the string table in a null.
template<support::endianness target_endianness, bool is64Bits>
void ELFObjectFile<target_endianness, is64Bits>
                  ::VerifyStrTab(const Elf_Shdr *sh) const {
  const char *strtab = (const char*)base() + sh->sh_offset;
  if (strtab[sh->sh_size - 1] != 0)
    // FIXME: Proper error handling.
    report_fatal_error("String table must end with a null terminator!");
}

template<support::endianness target_endianness, bool is64Bits>
ELFObjectFile<target_endianness, is64Bits>::ELFObjectFile(MemoryBuffer *Object
                                                          , error_code &ec)
  : ObjectFile(getELFType(target_endianness == support::little, is64Bits),
               Object, ec)
  , isDyldELFObject(false)
  , SectionHeaderTable(0)
  , dot_shstrtab_sec(0)
  , dot_strtab_sec(0)
  , dot_dynstr_sec(0)
  , dot_dynamic_sec(0)
  , dot_gnu_version_sec(0)
  , dot_gnu_version_r_sec(0)
  , dot_gnu_version_d_sec(0)
  , dt_soname(0)
 {

  const uint64_t FileSize = Data->getBufferSize();

  if (sizeof(Elf_Ehdr) > FileSize)
    // FIXME: Proper error handling.
    report_fatal_error("File too short!");

  Header = reinterpret_cast<const Elf_Ehdr *>(base());

  if (Header->e_shoff == 0)
    return;

  const uint64_t SectionTableOffset = Header->e_shoff;

  if (SectionTableOffset + sizeof(Elf_Shdr) > FileSize)
    // FIXME: Proper error handling.
    report_fatal_error("Section header table goes past end of file!");

  // The getNumSections() call below depends on SectionHeaderTable being set.
  SectionHeaderTable =
    reinterpret_cast<const Elf_Shdr *>(base() + SectionTableOffset);
  const uint64_t SectionTableSize = getNumSections() * Header->e_shentsize;

  if (SectionTableOffset + SectionTableSize > FileSize)
    // FIXME: Proper error handling.
    report_fatal_error("Section table goes past end of file!");

  // To find the symbol tables we walk the section table to find SHT_SYMTAB.
  const Elf_Shdr* SymbolTableSectionHeaderIndex = 0;
  const Elf_Shdr* sh = SectionHeaderTable;

  // Reserve SymbolTableSections[0] for .dynsym
  SymbolTableSections.push_back(NULL);

  for (uint64_t i = 0, e = getNumSections(); i != e; ++i) {
    switch (sh->sh_type) {
    case ELF::SHT_SYMTAB_SHNDX: {
      if (SymbolTableSectionHeaderIndex)
        // FIXME: Proper error handling.
        report_fatal_error("More than one .symtab_shndx!");
      SymbolTableSectionHeaderIndex = sh;
      break;
    }
    case ELF::SHT_SYMTAB: {
      SymbolTableSectionsIndexMap[i] = SymbolTableSections.size();
      SymbolTableSections.push_back(sh);
      break;
    }
    case ELF::SHT_DYNSYM: {
      if (SymbolTableSections[0] != NULL)
        // FIXME: Proper error handling.
        report_fatal_error("More than one .dynsym!");
      SymbolTableSectionsIndexMap[i] = 0;
      SymbolTableSections[0] = sh;
      break;
    }
    case ELF::SHT_REL:
    case ELF::SHT_RELA: {
      SectionRelocMap[getSection(sh->sh_info)].push_back(i);
      break;
    }
    case ELF::SHT_DYNAMIC: {
      if (dot_dynamic_sec != NULL)
        // FIXME: Proper error handling.
        report_fatal_error("More than one .dynamic!");
      dot_dynamic_sec = sh;
      break;
    }
    case ELF::SHT_GNU_versym: {
      if (dot_gnu_version_sec != NULL)
        // FIXME: Proper error handling.
        report_fatal_error("More than one .gnu.version section!");
      dot_gnu_version_sec = sh;
      break;
    }
    case ELF::SHT_GNU_verdef: {
      if (dot_gnu_version_d_sec != NULL)
        // FIXME: Proper error handling.
        report_fatal_error("More than one .gnu.version_d section!");
      dot_gnu_version_d_sec = sh;
      break;
    }
    case ELF::SHT_GNU_verneed: {
      if (dot_gnu_version_r_sec != NULL)
        // FIXME: Proper error handling.
        report_fatal_error("More than one .gnu.version_r section!");
      dot_gnu_version_r_sec = sh;
      break;
    }
    }
    ++sh;
  }

  // Sort section relocation lists by index.
  for (typename RelocMap_t::iterator i = SectionRelocMap.begin(),
                                     e = SectionRelocMap.end(); i != e; ++i) {
    std::sort(i->second.begin(), i->second.end());
  }

  // Get string table sections.
  dot_shstrtab_sec = getSection(getStringTableIndex());
  if (dot_shstrtab_sec) {
    // Verify that the last byte in the string table in a null.
    VerifyStrTab(dot_shstrtab_sec);
  }

  // Merge this into the above loop.
  for (const char *i = reinterpret_cast<const char *>(SectionHeaderTable),
                  *e = i + getNumSections() * Header->e_shentsize;
                   i != e; i += Header->e_shentsize) {
    const Elf_Shdr *sh = reinterpret_cast<const Elf_Shdr*>(i);
    if (sh->sh_type == ELF::SHT_STRTAB) {
      StringRef SectionName(getString(dot_shstrtab_sec, sh->sh_name));
      if (SectionName == ".strtab") {
        if (dot_strtab_sec != 0)
          // FIXME: Proper error handling.
          report_fatal_error("Already found section named .strtab!");
        dot_strtab_sec = sh;
        VerifyStrTab(dot_strtab_sec);
      } else if (SectionName == ".dynstr") {
        if (dot_dynstr_sec != 0)
          // FIXME: Proper error handling.
          report_fatal_error("Already found section named .dynstr!");
        dot_dynstr_sec = sh;
        VerifyStrTab(dot_dynstr_sec);
      }
    }
  }

  // Build symbol name side-mapping if there is one.
  if (SymbolTableSectionHeaderIndex) {
    const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() +
                                      SymbolTableSectionHeaderIndex->sh_offset);
    error_code ec;
    for (symbol_iterator si = begin_symbols(),
                         se = end_symbols(); si != se; si.increment(ec)) {
      if (ec)
        report_fatal_error("Fewer extended symbol table entries than symbols!");
      if (*ShndxTable != ELF::SHN_UNDEF)
        ExtendedSymbolTable[getSymbol(si->getRawDataRefImpl())] = *ShndxTable;
      ++ShndxTable;
    }
  }
}

template<support::endianness target_endianness, bool is64Bits>
symbol_iterator ELFObjectFile<target_endianness, is64Bits>
                             ::begin_symbols() const {
  DataRefImpl SymbolData;
  if (SymbolTableSections.size() <= 1) {
    SymbolData.d.a = std::numeric_limits<uint32_t>::max();
    SymbolData.d.b = std::numeric_limits<uint32_t>::max();
  } else {
    SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
    SymbolData.d.b = 1; // The 0th table is .dynsym
  }
  return symbol_iterator(SymbolRef(SymbolData, this));
}

template<support::endianness target_endianness, bool is64Bits>
symbol_iterator ELFObjectFile<target_endianness, is64Bits>
                             ::end_symbols() const {
  DataRefImpl SymbolData;
  SymbolData.d.a = std::numeric_limits<uint32_t>::max();
  SymbolData.d.b = std::numeric_limits<uint32_t>::max();
  return symbol_iterator(SymbolRef(SymbolData, this));
}

template<support::endianness target_endianness, bool is64Bits>
symbol_iterator ELFObjectFile<target_endianness, is64Bits>
                             ::begin_dynamic_symbols() const {
  DataRefImpl SymbolData;
  if (SymbolTableSections[0] == NULL) {
    SymbolData.d.a = std::numeric_limits<uint32_t>::max();
    SymbolData.d.b = std::numeric_limits<uint32_t>::max();
  } else {
    SymbolData.d.a = 1; // The 0th symbol in ELF is fake.
    SymbolData.d.b = 0; // The 0th table is .dynsym
  }
  return symbol_iterator(SymbolRef(SymbolData, this));
}

template<support::endianness target_endianness, bool is64Bits>
symbol_iterator ELFObjectFile<target_endianness, is64Bits>
                             ::end_dynamic_symbols() const {
  DataRefImpl SymbolData;
  SymbolData.d.a = std::numeric_limits<uint32_t>::max();
  SymbolData.d.b = std::numeric_limits<uint32_t>::max();
  return symbol_iterator(SymbolRef(SymbolData, this));
}

template<support::endianness target_endianness, bool is64Bits>
section_iterator ELFObjectFile<target_endianness, is64Bits>
                              ::begin_sections() const {
  DataRefImpl ret;
  ret.p = reinterpret_cast<intptr_t>(base() + Header->e_shoff);
  return section_iterator(SectionRef(ret, this));
}

template<support::endianness target_endianness, bool is64Bits>
section_iterator ELFObjectFile<target_endianness, is64Bits>
                              ::end_sections() const {
  DataRefImpl ret;
  ret.p = reinterpret_cast<intptr_t>(base()
                                     + Header->e_shoff
                                     + (Header->e_shentsize*getNumSections()));
  return section_iterator(SectionRef(ret, this));
}

template<support::endianness target_endianness, bool is64Bits>
typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
ELFObjectFile<target_endianness, is64Bits>::begin_dynamic_table() const {
  DataRefImpl DynData;
  if (dot_dynamic_sec == NULL || dot_dynamic_sec->sh_size == 0) {
    DynData.d.a = std::numeric_limits<uint32_t>::max();
  } else {
    DynData.d.a = 0;
  }
  return dyn_iterator(DynRef(DynData, this));
}

template<support::endianness target_endianness, bool is64Bits>
typename ELFObjectFile<target_endianness, is64Bits>::dyn_iterator
ELFObjectFile<target_endianness, is64Bits>
                          ::end_dynamic_table() const {
  DataRefImpl DynData;
  DynData.d.a = std::numeric_limits<uint32_t>::max();
  return dyn_iterator(DynRef(DynData, this));
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getDynNext(DataRefImpl DynData,
                                     DynRef &Result) const {
  ++DynData.d.a;

  // Check to see if we are at the end of .dynamic
  if (DynData.d.a >= dot_dynamic_sec->getEntityCount()) {
    // We are at the end. Return the terminator.
    DynData.d.a = std::numeric_limits<uint32_t>::max();
  }

  Result = DynRef(DynData, this);
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
StringRef
ELFObjectFile<target_endianness, is64Bits>::getLoadName() const {
  if (!dt_soname) {
    // Find the DT_SONAME entry
    dyn_iterator it = begin_dynamic_table();
    dyn_iterator ie = end_dynamic_table();
    error_code ec;
    while (it != ie) {
      if (it->getTag() == ELF::DT_SONAME)
        break;
      it.increment(ec);
      if (ec)
        report_fatal_error("dynamic table iteration failed");
    }
    if (it != ie) {
      if (dot_dynstr_sec == NULL)
        report_fatal_error("Dynamic string table is missing");
      dt_soname = getString(dot_dynstr_sec, it->getVal());
    } else {
      dt_soname = "";
    }
  }
  return dt_soname;
}

template<support::endianness target_endianness, bool is64Bits>
library_iterator ELFObjectFile<target_endianness, is64Bits>
                             ::begin_libraries_needed() const {
  // Find the first DT_NEEDED entry
  dyn_iterator i = begin_dynamic_table();
  dyn_iterator e = end_dynamic_table();
  error_code ec;
  while (i != e) {
    if (i->getTag() == ELF::DT_NEEDED)
      break;
    i.increment(ec);
    if (ec)
      report_fatal_error("dynamic table iteration failed");
  }
  // Use the same DataRefImpl format as DynRef.
  return library_iterator(LibraryRef(i->getRawDataRefImpl(), this));
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getLibraryNext(DataRefImpl Data,
                                         LibraryRef &Result) const {
  // Use the same DataRefImpl format as DynRef.
  dyn_iterator i = dyn_iterator(DynRef(Data, this));
  dyn_iterator e = end_dynamic_table();

  // Skip the current dynamic table entry.
  error_code ec;
  if (i != e) {
    i.increment(ec);
    // TODO: proper error handling
    if (ec)
      report_fatal_error("dynamic table iteration failed");
  }

  // Find the next DT_NEEDED entry.
  while (i != e) {
    if (i->getTag() == ELF::DT_NEEDED)
      break;
    i.increment(ec);
    if (ec)
      report_fatal_error("dynamic table iteration failed");
  }
  Result = LibraryRef(i->getRawDataRefImpl(), this);
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
         ::getLibraryPath(DataRefImpl Data, StringRef &Res) const {
  dyn_iterator i = dyn_iterator(DynRef(Data, this));
  if (i == end_dynamic_table())
    report_fatal_error("getLibraryPath() called on iterator end");

  if (i->getTag() != ELF::DT_NEEDED)
    report_fatal_error("Invalid library_iterator");

  // This uses .dynstr to lookup the name of the DT_NEEDED entry.
  // THis works as long as DT_STRTAB == .dynstr. This is true most of
  // the time, but the specification allows exceptions.
  // TODO: This should really use DT_STRTAB instead. Doing this requires
  // reading the program headers.
  if (dot_dynstr_sec == NULL)
    report_fatal_error("Dynamic string table is missing");
  Res = getString(dot_dynstr_sec, i->getVal());
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
library_iterator ELFObjectFile<target_endianness, is64Bits>
                             ::end_libraries_needed() const {
  dyn_iterator e = end_dynamic_table();
  // Use the same DataRefImpl format as DynRef.
  return library_iterator(LibraryRef(e->getRawDataRefImpl(), this));
}

template<support::endianness target_endianness, bool is64Bits>
uint8_t ELFObjectFile<target_endianness, is64Bits>::getBytesInAddress() const {
  return is64Bits ? 8 : 4;
}

template<support::endianness target_endianness, bool is64Bits>
StringRef ELFObjectFile<target_endianness, is64Bits>
                       ::getFileFormatName() const {
  switch(Header->e_ident[ELF::EI_CLASS]) {
  case ELF::ELFCLASS32:
    switch(Header->e_machine) {
    case ELF::EM_386:
      return "ELF32-i386";
    case ELF::EM_X86_64:
      return "ELF32-x86-64";
    case ELF::EM_ARM:
      return "ELF32-arm";
    default:
      return "ELF32-unknown";
    }
  case ELF::ELFCLASS64:
    switch(Header->e_machine) {
    case ELF::EM_386:
      return "ELF64-i386";
    case ELF::EM_X86_64:
      return "ELF64-x86-64";
    default:
      return "ELF64-unknown";
    }
  default:
    // FIXME: Proper error handling.
    report_fatal_error("Invalid ELFCLASS!");
  }
}

template<support::endianness target_endianness, bool is64Bits>
unsigned ELFObjectFile<target_endianness, is64Bits>::getArch() const {
  switch(Header->e_machine) {
  case ELF::EM_386:
    return Triple::x86;
  case ELF::EM_X86_64:
    return Triple::x86_64;
  case ELF::EM_ARM:
    return Triple::arm;
  default:
    return Triple::UnknownArch;
  }
}

template<support::endianness target_endianness, bool is64Bits>
uint64_t ELFObjectFile<target_endianness, is64Bits>::getNumSections() const {
  assert(Header && "Header not initialized!");
  if (Header->e_shnum == ELF::SHN_UNDEF) {
    assert(SectionHeaderTable && "SectionHeaderTable not initialized!");
    return SectionHeaderTable->sh_size;
  }
  return Header->e_shnum;
}

template<support::endianness target_endianness, bool is64Bits>
uint64_t
ELFObjectFile<target_endianness, is64Bits>::getStringTableIndex() const {
  if (Header->e_shnum == ELF::SHN_UNDEF) {
    if (Header->e_shstrndx == ELF::SHN_HIRESERVE)
      return SectionHeaderTable->sh_link;
    if (Header->e_shstrndx >= getNumSections())
      return 0;
  }
  return Header->e_shstrndx;
}


template<support::endianness target_endianness, bool is64Bits>
template<typename T>
inline const T *
ELFObjectFile<target_endianness, is64Bits>::getEntry(uint16_t Section,
                                                     uint32_t Entry) const {
  return getEntry<T>(getSection(Section), Entry);
}

template<support::endianness target_endianness, bool is64Bits>
template<typename T>
inline const T *
ELFObjectFile<target_endianness, is64Bits>::getEntry(const Elf_Shdr * Section,
                                                     uint32_t Entry) const {
  return reinterpret_cast<const T *>(
           base()
           + Section->sh_offset
           + (Entry * Section->sh_entsize));
}

template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
ELFObjectFile<target_endianness, is64Bits>::getSymbol(DataRefImpl Symb) const {
  return getEntry<Elf_Sym>(SymbolTableSections[Symb.d.b], Symb.d.a);
}

template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Dyn *
ELFObjectFile<target_endianness, is64Bits>::getDyn(DataRefImpl DynData) const {
  return getEntry<Elf_Dyn>(dot_dynamic_sec, DynData.d.a);
}

template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rel *
ELFObjectFile<target_endianness, is64Bits>::getRel(DataRefImpl Rel) const {
  return getEntry<Elf_Rel>(Rel.w.b, Rel.w.c);
}

template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rela *
ELFObjectFile<target_endianness, is64Bits>::getRela(DataRefImpl Rela) const {
  return getEntry<Elf_Rela>(Rela.w.b, Rela.w.c);
}

template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
ELFObjectFile<target_endianness, is64Bits>::getSection(DataRefImpl Symb) const {
  const Elf_Shdr *sec = getSection(Symb.d.b);
  if (sec->sh_type != ELF::SHT_SYMTAB || sec->sh_type != ELF::SHT_DYNSYM)
    // FIXME: Proper error handling.
    report_fatal_error("Invalid symbol table section!");
  return sec;
}

template<support::endianness target_endianness, bool is64Bits>
const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Shdr *
ELFObjectFile<target_endianness, is64Bits>::getSection(uint32_t index) const {
  if (index == 0)
    return 0;
  if (!SectionHeaderTable || index >= getNumSections())
    // FIXME: Proper error handling.
    report_fatal_error("Invalid section index!");

  return reinterpret_cast<const Elf_Shdr *>(
         reinterpret_cast<const char *>(SectionHeaderTable)
         + (index * Header->e_shentsize));
}

template<support::endianness target_endianness, bool is64Bits>
const char *ELFObjectFile<target_endianness, is64Bits>
                         ::getString(uint32_t section,
                                     ELF::Elf32_Word offset) const {
  return getString(getSection(section), offset);
}

template<support::endianness target_endianness, bool is64Bits>
const char *ELFObjectFile<target_endianness, is64Bits>
                         ::getString(const Elf_Shdr *section,
                                     ELF::Elf32_Word offset) const {
  assert(section && section->sh_type == ELF::SHT_STRTAB && "Invalid section!");
  if (offset >= section->sh_size)
    // FIXME: Proper error handling.
    report_fatal_error("Symbol name offset outside of string table!");
  return (const char *)base() + section->sh_offset + offset;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolName(const Elf_Shdr *section,
                                        const Elf_Sym *symb,
                                        StringRef &Result) const {
  if (symb->st_name == 0) {
    const Elf_Shdr *section = getSection(symb);
    if (!section)
      Result = "";
    else
      Result = getString(dot_shstrtab_sec, section->sh_name);
    return object_error::success;
  }

  if (section == SymbolTableSections[0]) {
    // Symbol is in .dynsym, use .dynstr string table
    Result = getString(dot_dynstr_sec, symb->st_name);
  } else {
    // Use the default symbol table name section.
    Result = getString(dot_strtab_sec, symb->st_name);
  }
  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
                        ::getSymbolVersion(const Elf_Shdr *section,
                                           const Elf_Sym *symb,
                                           StringRef &Version,
                                           bool &IsDefault) const {
  // Handle non-dynamic symbols.
  if (section != SymbolTableSections[0]) {
    // Non-dynamic symbols can have versions in their names
    // A name of the form 'foo@V1' indicates version 'V1', non-default.
    // A name of the form 'foo@@V2' indicates version 'V2', default version.
    StringRef Name;
    error_code ec = getSymbolName(section, symb, Name);
    if (ec != object_error::success)
      return ec;
    size_t atpos = Name.find('@');
    if (atpos == StringRef::npos) {
      Version = "";
      IsDefault = false;
      return object_error::success;
    }
    ++atpos;
    if (atpos < Name.size() && Name[atpos] == '@') {
      IsDefault = true;
      ++atpos;
    } else {
      IsDefault = false;
    }
    Version = Name.substr(atpos);
    return object_error::success;
  }

  // This is a dynamic symbol. Look in the GNU symbol version table.
  if (dot_gnu_version_sec == NULL) {
    // No version table.
    Version = "";
    IsDefault = false;
    return object_error::success;
  }

  // Determine the position in the symbol table of this entry.
  const char *sec_start = (const char*)base() + section->sh_offset;
  size_t entry_index = ((const char*)symb - sec_start)/section->sh_entsize;

  // Get the corresponding version index entry
  const Elf_Versym *vs = getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index);
  size_t version_index = vs->vs_index & ELF::VERSYM_VERSION;

  // Special markers for unversioned symbols.
  if (version_index == ELF::VER_NDX_LOCAL ||
      version_index == ELF::VER_NDX_GLOBAL) {
    Version = "";
    IsDefault = false;
    return object_error::success;
  }

  // Lookup this symbol in the version table
  LoadVersionMap();
  if (version_index >= VersionMap.size() || VersionMap[version_index].isNull())
    report_fatal_error("Symbol has version index without corresponding "
                       "define or reference entry");
  const VersionMapEntry &entry = VersionMap[version_index];

  // Get the version name string
  size_t name_offset;
  if (entry.isVerdef()) {
    // The first Verdaux entry holds the name.
    name_offset = entry.getVerdef()->getAux()->vda_name;
  } else {
    name_offset = entry.getVernaux()->vna_name;
  }
  Version = getString(dot_dynstr_sec, name_offset);

  // Set IsDefault
  if (entry.isVerdef()) {
    IsDefault = !(vs->vs_index & ELF::VERSYM_HIDDEN);
  } else {
    IsDefault = false;
  }

  return object_error::success;
}

template<support::endianness target_endianness, bool is64Bits>
inline DynRefImpl<target_endianness, is64Bits>
                 ::DynRefImpl(DataRefImpl DynP, const OwningType *Owner)
  : DynPimpl(DynP)
  , OwningObject(Owner) {}

template<support::endianness target_endianness, bool is64Bits>
inline bool DynRefImpl<target_endianness, is64Bits>
                      ::operator==(const DynRefImpl &Other) const {
  return DynPimpl == Other.DynPimpl;
}

template<support::endianness target_endianness, bool is64Bits>
inline bool DynRefImpl<target_endianness, is64Bits>
                      ::operator <(const DynRefImpl &Other) const {
  return DynPimpl < Other.DynPimpl;
}

template<support::endianness target_endianness, bool is64Bits>
inline error_code DynRefImpl<target_endianness, is64Bits>
                            ::getNext(DynRefImpl &Result) const {
  return OwningObject->getDynNext(DynPimpl, Result);
}

template<support::endianness target_endianness, bool is64Bits>
inline int64_t DynRefImpl<target_endianness, is64Bits>
                            ::getTag() const {
  return OwningObject->getDyn(DynPimpl)->d_tag;
}

template<support::endianness target_endianness, bool is64Bits>
inline uint64_t DynRefImpl<target_endianness, is64Bits>
                            ::getVal() const {
  return OwningObject->getDyn(DynPimpl)->d_un.d_val;
}

template<support::endianness target_endianness, bool is64Bits>
inline uint64_t DynRefImpl<target_endianness, is64Bits>
                            ::getPtr() const {
  return OwningObject->getDyn(DynPimpl)->d_un.d_ptr;
}

template<support::endianness target_endianness, bool is64Bits>
inline DataRefImpl DynRefImpl<target_endianness, is64Bits>
                             ::getRawDataRefImpl() const {
  return DynPimpl;
}

/// This is a generic interface for retrieving GNU symbol version
/// information from an ELFObjectFile.
static inline error_code GetELFSymbolVersion(const ObjectFile *Obj,
                                             const SymbolRef &Sym,
                                             StringRef &Version,
                                             bool &IsDefault) {
  // Little-endian 32-bit
  if (const ELFObjectFile<support::little, false> *ELFObj =
          dyn_cast<ELFObjectFile<support::little, false> >(Obj))
    return ELFObj->getSymbolVersion(Sym, Version, IsDefault);

  // Big-endian 32-bit
  if (const ELFObjectFile<support::big, false> *ELFObj =
          dyn_cast<ELFObjectFile<support::big, false> >(Obj))
    return ELFObj->getSymbolVersion(Sym, Version, IsDefault);

  // Little-endian 64-bit
  if (const ELFObjectFile<support::little, true> *ELFObj =
          dyn_cast<ELFObjectFile<support::little, true> >(Obj))
    return ELFObj->getSymbolVersion(Sym, Version, IsDefault);

  // Big-endian 64-bit
  if (const ELFObjectFile<support::big, true> *ELFObj =
          dyn_cast<ELFObjectFile<support::big, true> >(Obj))
    return ELFObj->getSymbolVersion(Sym, Version, IsDefault);

  llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");
}

}
}

#endif