aboutsummaryrefslogtreecommitdiffstats
path: root/src/vppinfra/elf.h
blob: 8d9893120f5aea5ef270851b135baf3c767c79c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
  Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef included_clib_elf_h
#define included_clib_elf_h

#include <vppinfra/format.h>
#include <vppinfra/hash.h>
#include <vppinfra/vec.h>
#include <vppinfra/byte_order.h>

#define foreach_elf_file_class \
  _ (CLASS_NONE) _ (32BIT) _ (64BIT)

#define foreach_elf_data_encoding		\
  _ (ENCODING_NONE)				\
  _ (TWOS_COMPLEMENT_LITTLE_ENDIAN)		\
  _ (TWOS_COMPLEMENT_BIG_ENDIAN)

#define ELF_VERSION_NONE (0)
#define ELF_VERSION_CURRENT (1)

#define foreach_elf_abi				\
  _ (SYSV, 0)					\
  _ (HPUX, 1)					\
  _ (NETBSD, 2)					\
  _ (LINUX, 3)					\
  _ (SOLARIS, 6)				\
  _ (AIX, 7)					\
  _ (IRIX, 8)					\
  _ (FREEBSD, 9)				\
  _ (COMPAQ_TRU64, 10)				\
  _ (MODESTO, 11)				\
  _ (OPENBSD, 12)				\
  _ (ARM, 97)					\
  _ (STANDALONE, 255)

/* Legal values for type (object file type).  */
#define foreach_elf_file_type			\
  _ (NONE, 0)					\
  _ (RELOC, 1)					\
  _ (EXEC, 2)					\
  _ (SHARED, 3)					\
  _ (CORE, 4)					\
  _ (OS_SPECIFIC_LO, 0xfe00)			\
  _ (OS_SPECIFIC_HI, 0xfeff)			\
  _ (ARCH_SPECIFIC_LO, 0xff00)			\
  _ (ARCH_SPECIFIC_HI, 0xffff)

/* Legal values for architecture.  */
#define foreach_elf_architecture					\
  _ (NONE, 0)			/* No machine */			\
  _ (M32, 1)			/* AT&T WE 32100 */			\
  _ (SPARC, 2)			/* SUN SPARC */				\
  _ (386, 3)			/* Intel 80386 */			\
  _ (68K, 4)			/* Motorola m68k family */		\
  _ (88K, 5)			/* Motorola m88k family */		\
  _ (860, 7)			/* Intel 80860 */			\
  _ (MIPS, 8)			/* MIPS R3000 big-endian */		\
  _ (S370, 9)			/* IBM System/370 */			\
  _ (MIPS_RS3_LE, 10)		/* MIPS R3000 little-endian */		\
  _ (PARISC, 15)		/* HPPA */				\
  _ (VPP500, 17)		/* Fujitsu VPP500 */			\
  _ (SPARC32PLUS, 18)		/* Sun's "v8plus" */			\
  _ (960, 19)			/* Intel 80960 */			\
  _ (PPC, 20)			/* PowerPC */				\
  _ (PPC64, 21)			/* PowerPC 64-bit */			\
  _ (S390, 22)			/* IBM S390 */				\
  _ (V800, 36)			/* NEC V800 series */			\
  _ (FR20, 37)			/* Fujitsu FR20 */			\
  _ (RH32, 38)			/* TRW RH-32 */				\
  _ (RCE, 39)			/* Motorola RCE */			\
  _ (ARM, 40)			/* ARM */				\
  _ (FAKE_ALPHA, 41)		/* Digital Alpha */			\
  _ (SH, 42)			/* Hitachi SH */			\
  _ (SPARCV9, 43)		/* SPARC v9 64-bit */			\
  _ (TRICORE, 44)		/* Siemens Tricore */			\
  _ (ARC, 45)			/* Argonaut RISC Core */		\
  _ (H8_300, 46)		/* Hitachi H8/300 */			\
  _ (H8_300H, 47)		/* Hitachi H8/300H */			\
  _ (H8S, 48)			/* Hitachi H8S */			\
  _ (H8_500, 49)		/* Hitachi H8/500 */			\
  _ (IA_64, 50)			/* Intel Merced */			\
  _ (MIPS_X, 51)		/* Stanford MIPS-X */			\
  _ (COLDFIRE, 52)		/* Motorola Coldfire */			\
  _ (68HC12, 53)		/* Motorola M68HC12 */			\
  _ (MMA, 54)			/* Fujitsu MMA Multimedia Accel. */	\
  _ (PCP, 55)			/* Siemens PCP */			\
  _ (NCPU, 56)			/* Sony nCPU embedded RISC */		\
  _ (NDR1, 57)			/* Denso NDR1 microprocessor */		\
  _ (STARCORE, 58)		/* Motorola Start*Core processor */	\
  _ (ME16, 59)			/* Toyota ME16 processor */		\
  _ (ST100, 60)			/* STMicroelectronic ST100  */		\
  _ (TINYJ, 61)			/* Advanced Logic Corp. Tinyj */	\
  _ (X86_64, 62)		/* AMD x86-64 architecture */		\
  _ (PDSP, 63)			/* Sony DSP Processor */		\
  _ (FX66, 66)			/* Siemens FX66 microcontroller */	\
  _ (ST9PLUS, 67)		/* STMicroelectronics ST9+ 8/16 mc */	\
  _ (ST7, 68)			/* STmicroelectronics ST7 8 bit mc */	\
  _ (68HC16, 69)		/* Motorola MC68HC16 */			\
  _ (68HC11, 70)		/* Motorola MC68HC11 */			\
  _ (68HC08, 71)		/* Motorola MC68HC08 */			\
  _ (68HC05, 72)		/* Motorola MC68HC05 */			\
  _ (SVX, 73)			/* Silicon Graphics SVx */		\
  _ (ST19, 74)			/* STMicroelectronics ST19 8 bit mc */	\
  _ (VAX, 75)			/* Digital VAX */			\
  _ (CRIS, 76)			/* Axis 32-bit embedded proc. */	\
  _ (JAVELIN, 77)		/* Infineon 32-bit embedded proc. */	\
  _ (FIREPATH, 78)		/* Element 14 64-bit DSP Processor */	\
  _ (ZSP, 79)			/* LSI Logic 16-bit DSP Processor */	\
  _ (MMIX, 80)			/* Knuth's 64-bit processor */		\
  _ (HUANY, 81)			/* Harvard machine-independent */	\
  _ (PRISM, 82)			/* SiTera Prism */			\
  _ (AVR, 83)			/* Atmel AVR 8-bit microcontroller */	\
  _ (FR30, 84)			/* Fujitsu FR30 */			\
  _ (D10V, 85)			/* Mitsubishi D10V */			\
  _ (D30V, 86)			/* Mitsubishi D30V */			\
  _ (V850, 87)			/* NEC v850 */				\
  _ (M32R, 88)			/* Mitsubishi M32R */			\
  _ (MN10300, 89)		/* Matsushita MN10300 */		\
  _ (MN10200, 90)		/* Matsushita MN10200 */		\
  _ (PJ, 91)			/* picoJava */				\
  _ (OPENRISC, 92)		/* OpenRISC 32-bit processor */		\
  _ (ARC_A5, 93)		/* ARC Cores Tangent-A5 */		\
  _ (XTENSA, 94)		/* Tensilica Xtensa Architecture */	\
  _ (ALPHA, 0x9026)

#define _(f) ELF_##f,

typedef enum
{
  foreach_elf_file_class ELF_N_FILE_CLASS,
} elf_file_class_t;

typedef enum
{
  foreach_elf_data_encoding ELF_N_DATA_ENCODING,
} elf_data_encoding_t;

#undef _

#define _(f,i) ELF_##f = i,

typedef enum
{
  foreach_elf_abi
} elf_abi_t;

typedef enum
{
  foreach_elf_file_type
} elf_file_type_t;

#undef _

typedef enum
{
#define _(f,i) ELF_ARCH_##f = i,
  foreach_elf_architecture
#undef _
} elf_architecture_t;

typedef struct
{
  /* 0x7f ELF */
  u8 magic[4];

  elf_file_class_t file_class:8;
  elf_data_encoding_t data_encoding:8;
  u8 file_version_ident;
  elf_abi_t abi:8;
  u8 abi_version;

  u8 pad[7];

  elf_file_type_t file_type:16;
  elf_architecture_t architecture:16;

  u32 file_version;
} elf_first_header_t;

/* 32/64 bit file header following basic file header. */
#define foreach_elf32_file_header		\
  _ (u32, entry_point)				\
  _ (u32, segment_header_file_offset)		\
  _ (u32, section_header_file_offset)		\
  _ (u32, flags)				\
  _ (u16, n_bytes_this_header)			\
  _ (u16, segment_header_size)			\
  _ (u16, segment_header_count)			\
  _ (u16, section_header_size)			\
  _ (u16, section_header_count)			\
  _ (u16, section_header_string_table_index)

#define foreach_elf64_file_header		\
  _ (u64, entry_point)				\
  _ (u64, segment_header_file_offset)		\
  _ (u64, section_header_file_offset)		\
  _ (u32, flags)				\
  _ (u16, n_bytes_this_header)			\
  _ (u16, segment_header_size)			\
  _ (u16, segment_header_count)			\
  _ (u16, section_header_size)			\
  _ (u16, section_header_count)			\
  _ (u16, section_header_string_table_index)

/* Section header.  */
#define foreach_elf32_section_header		\
  _ (u32, name)					\
  _ (u32, type)					\
  _ (u32, flags)				\
  _ (u32, exec_address)				\
  _ (u32, file_offset)				\
  _ (u32, file_size)				\
  _ (u32, link)					\
  _ (u32, additional_info)			\
  _ (u32, align)				\
  _ (u32, entry_size)

#define foreach_elf64_section_header		\
  _ (u32, name)					\
  _ (u32, type)					\
  _ (u64, flags)				\
  _ (u64, exec_address)				\
  _ (u64, file_offset)				\
  _ (u64, file_size)				\
  _ (u32, link)					\
  _ (u32, additional_info)			\
  _ (u64, align)				\
  _ (u64, entry_size)

/* Program segment header.  */
#define foreach_elf32_segment_header		\
  _ (u32, type)					\
  _ (u32, file_offset)				\
  _ (u32, virtual_address)			\
  _ (u32, physical_address)			\
  _ (u32, file_size)				\
  _ (u32, memory_size)				\
  _ (u32, flags)				\
  _ (u32, align)

#define foreach_elf64_segment_header		\
  _ (u32, type)					\
  _ (u32, flags)				\
  _ (u64, file_offset)				\
  _ (u64, virtual_address)			\
  _ (u64, physical_address)			\
  _ (u64, file_size)				\
  _ (u64, memory_size)				\
  _ (u64, align)

/* Symbol table.  */
#define foreach_elf32_symbol_header		\
  _ (u32, name)					\
  _ (u32, value)				\
  _ (u32, size)					\
  /* binding upper 4 bits; type lower 4 bits */	\
  _ (u8, binding_and_type)			\
  _ (u8, visibility)				\
  _ (u16, section_index)

#define foreach_elf64_symbol_header		\
  _ (u32, name)					\
  _ (u8, binding_and_type)			\
  _ (u8, visibility)				\
  _ (u16, section_index)			\
  _ (u64, value)				\
  _ (u64, size)

#define _(t,f) t f;

typedef struct
{
foreach_elf32_file_header} elf32_file_header_t;

typedef struct
{
foreach_elf64_file_header} elf64_file_header_t;

typedef struct
{
foreach_elf32_section_header} elf32_section_header_t;

typedef struct
{
foreach_elf64_section_header} elf64_section_header_t;

typedef struct
{
foreach_elf32_segment_header} elf32_segment_header_t;

typedef struct
{
foreach_elf64_segment_header} elf64_segment_header_t;

typedef struct
{
foreach_elf32_symbol_header} elf32_symbol_t;

typedef struct
{
foreach_elf64_symbol_header} elf64_symbol_t;
#undef _

/* Special section names.  */
#define foreach_elf_symbol_reserved_section_index			\
  _ (ABSOLUTE, 0xfff1)		/* Associated symbol is absolute */	\
  _ (COMMON, 0xfff2)		/* Associated symbol is common */	\
  _ (XINDEX, 0xffff)		/* Index is in extra table.  */

#define ELF_SYMBOL_SECTION_RESERVED_LO 0xff00
#define ELF_SYMBOL_SECTION_RESERVED_HI 0xffff
#define ELF_SYMBOL_SECTION_ARCH_SPECIFIC_LO 0xff00
#define ELF_SYMBOL_SECTION_ARCH_SPECIFIC_HI 0xff1f
#define ELF_SYMBOL_SECTION_OS_SPECIFIC_LO 0xff20
#define ELF_SYMBOL_SECTION_OS_SPECIFIC_HI 0xff3f

/* Section types. */
#define foreach_elf_section_type					\
  _ (UNUSED, 0)								\
  _ (PROGRAM_DATA, 1)							\
  _ (SYMBOL_TABLE, 2)							\
  _ (STRING_TABLE, 3)							\
  _ (RELOCATION_ADD, 4)							\
  _ (SYMBOL_TABLE_HASH, 5)						\
  _ (DYNAMIC, 6)		/* Dynamic linking information */	\
  _ (NOTE, 7)			/* Notes */				\
  _ (NO_BITS, 8)		/* Program space with no data (bss) */	\
  _ (RELOCATION, 9)		/* Relocation entries, no addends */	\
  _ (DYNAMIC_SYMBOL_TABLE, 11)	/* Dynamic linker symbol table */	\
  _ (INIT_ARRAY, 14)		/* Array of constructors */		\
  _ (FINI_ARRAY, 15)		/* Array of destructors */		\
  _ (PREINIT_ARRAY, 16)		/* Array of pre-constructors */		\
  _ (GROUP, 17)			/* Section group */			\
  _ (SYMTAB_SHNDX, 18)		/* Extended section indices */		\
  _ (OS_SPECIFIC_LO, 0x60000000) /* Start OS-specific */		\
  _ (GNU_LIBLIST, 0x6ffffff7)	/* Prelink library list */		\
  _ (CHECKSUM, 0x6ffffff8)	/* Checksum for DSO content.  */	\
  _ (SUNW_MOVE, 0x6ffffffa)						\
  _ (SUNW_COMDAT, 0x6ffffffb)						\
  _ (SUNW_SYMINFO, 0x6ffffffc)						\
  _ (GNU_VERDEF, 0x6ffffffd)	/* Version definition section.  */	\
  _ (GNU_VERNEED, 0x6ffffffe) /* Version needs section.  */		\
  _ (GNU_VERSYM, 0x6fffffff)	/* Version symbol table.  */		\
  _ (ARCH_SPECIFIC_LO, 0x70000000) /* Start of processor-specific */	\
  _ (ARCH_SPECIFIC_HI, 0x7fffffff) /* End of processor-specific */	\
  _ (APP_SPECIFIC_LO, 0x80000000) /* Start of application-specific */	\
  _ (APP_SPECIFIC_HI, 0x8fffffff)	/* End of application-specific */

/* Section flags. */
#define foreach_elf_section_flag		\
  _ (WRITE, 0)					\
  _ (ALLOC, 1)					\
  _ (EXEC, 2)					\
  _ (MERGE, 3)					\
  _ (STRING_TABLE, 5)				\
  _ (INFO_LINK, 6)				\
  _ (PRESERVE_LINK_ORDER, 7)			\
  _ (OS_NON_CONFORMING, 8)			\
  _ (GROUP, 9)					\
  _ (TLS, 10)					\
  _ (OS_SPECIFIC_LO, 20)			\
  _ (OS_SPECIFIC_HI, 27)			\
  _ (ARCH_SPECIFIC_LO, 28)			\
  _ (ARCH_SPECIFIC_HI, 31)

typedef enum
{
#define _(f,i) ELF_SECTION_##f = i,
  foreach_elf_section_type
#undef _
    ELF_SECTION_OS_SPECIFIC_HI = 0x6fffffff,
} elf_section_type_t;

typedef enum
{
#define _(f,i) ELF_SECTION_FLAG_BIT_##f = i,
  foreach_elf_section_flag
#undef _
} elf_section_flag_bit_t;

typedef enum
{
#define _(f,i) ELF_SECTION_FLAG_##f = 1 << ELF_SECTION_FLAG_BIT_##f,
  foreach_elf_section_flag
#undef _
} elf_section_flag_t;

/* Symbol bindings (upper 4 bits of binding_and_type). */
#define foreach_elf_symbol_binding					\
  _ (LOCAL, 0)			/* Local symbol */			\
  _ (GLOBAL, 1)			/* Global symbol */			\
  _ (WEAK, 2)			/* Weak symbol */			\
  _ (OS_SPECIFIC_LO, 10)	/* Start of OS-specific */		\
  _ (OS_SPECIFIC_HI, 12)	/* End of OS-specific */		\
  _ (ARCH_SPECIFIC_LO, 13)	/* Start of processor-specific */	\
  _ (ARCH_SPECIFIC_HI, 15)	/* End of processor-specific */

/* Symbol types (lower 4 bits of binding_and_type). */
#define foreach_elf_symbol_type						\
  _ (NONE, 0)								\
  _ (DATA, 1)			/* Symbol is a data object */		\
  _ (CODE, 2)			/* Symbol is a code object */		\
  _ (SECTION, 3)		/* Symbol associated with a section */	\
  _ (FILE, 4)			/* Symbol's name is file name */	\
  _ (COMMON, 5)			/* Symbol is a common data object */	\
  _ (TLS, 6)			/* Symbol is thread-local data */	\
  _ (OS_SPECIFIC_LO, 10)	/* Start of OS-specific */		\
  _ (OS_SPECIFIC_HI, 12)	/* End of OS-specific */		\
  _ (ARCH_SPECIFIC_LO, 13)	/* Start of processor-specific */	\
  _ (ARCH_SPECIFIC_HI, 15)	/* End of processor-specific */

/* Symbol visibility. */
#define foreach_elf_symbol_visibility					\
  _ (DEFAULT, 0)		/* Default symbol visibility rules */	\
  _ (INTERNAL, 1)		/* Processor specific hidden class */	\
  _ (HIDDEN, 2)			/* Unavailable in other modules */	\
  _ (PROTECTED, 3)		/* Not preemptible, not exported */

/* The syminfo section if available contains additional
   information about every dynamic symbol.  */
typedef struct
{
  u16 bound_to;
  u16 flags;
} elf_symbol_info_t;

/* Possible values for bound_to.  */
#define foreach_elf_symbol_info_bound_to			\
  _ (SELF, 0xffff)		/* Symbol bound to self */	\
  _ (PARENT, 0xfffe)		/* Symbol bound to parent */	\
  _ (RESERVED_LO, 0xff00)					\
  _ (RESERVED_HI, 0xffff)

/* Symbol info flags. */
#define foreach_elf_symbol_info_flags					\
  _ (DIRECT)			/* Direct bound symbol */		\
  _ (PASS_THRU)			/* Pass-thru symbol for translator */	\
  _ (COPY)			/* Symbol is a copy-reloc */		\
  _ (LAZY_LOAD)			/* Symbol bound to object to be lazy loaded */

/* Relocation table entry with/without addend. */
typedef struct
{
  u32 address;
  u32 symbol_and_type;		/* high 24 symbol, low 8 type. */
  i32 addend[0];
} elf32_relocation_t;

typedef struct
{
  u64 address;
  u64 symbol_and_type;		/* high 32 symbol, low 32 type. */
  i64 addend[0];
} elf64_relocation_t;

typedef struct
{
  u64 address;
  u64 symbol_and_type;
  u64 addend;
} elf_relocation_with_addend_t;

#define elf_relocation_next(r,type)					\
  ((void *) ((r) + 1)							\
   + ((type) == ELF_SECTION_RELOCATION_ADD ? sizeof ((r)->addend[0]) : 0))

/* Segment type. */
#define foreach_elf_segment_type					\
  _ (UNUSED, 0)								\
  _ (LOAD, 1)			/* Loadable program segment */		\
  _ (DYNAMIC, 2)		/* Dynamic linking information */	\
  _ (INTERP, 3)			/* Program interpreter */		\
  _ (NOTE, 4)			/* Auxiliary information */		\
  _ (SEGMENT_TABLE, 6)		/* Entry for header table itself */	\
  _ (TLS, 7)			/* Thread-local storage segment */	\
  _ (OS_SPECIFIC_LO, 0x60000000) /* Start of OS-specific */		\
  _ (GNU_EH_FRAME, 0x6474e550)	/* GCC .eh_frame_hdr segment */		\
  _ (GNU_STACK, 0x6474e551)	/* Indicates stack executability */	\
  _ (GNU_RELRO, 0x6474e552)	/* Read-only after relocation */	\
  _ (SUNW_BSS, 0x6ffffffa)	/* Sun specific BSS */			\
  _ (SUNW_STACK, 0x6ffffffb)	/* Sun specific stack */		\
  _ (OS_SPECIFIC_HI, 0x6fffffff) /* End of OS-specific */		\
  _ (ARCH_SPECIFIC_LO, 0x70000000) /* Start of processor-specific */	\
  _ (ARCH_SPECIFIC_HI, 0x7fffffff)	/* End of processor-specific */

/* Segment flags. */
#define foreach_elf_segment_flag		\
  _ (EXEC, 0)					\
  _ (WRITE, 1)					\
  _ (READ, 2)					\
  _ (OS_SPECIFIC_LO, 20)			\
  _ (OS_SPECIFIC_HI, 27)			\
  _ (ARCH_SPECIFIC_LO, 28)			\
  _ (ARCH_SPECIFIC_HI, 31)

typedef enum
{
#define _(f,i) ELF_SEGMENT_##f = i,
  foreach_elf_segment_type
#undef _
} elf_segment_type_t;

typedef enum
{
#define _(f,i) ELF_SEGMENT_FLAG_BIT_##f = i,
  foreach_elf_segment_flag
#undef _
} elf_segment_flag_bit_t;

typedef enum
{
#define _(f,i) ELF_SEGMENT_FLAG_##f = 1 << ELF_SEGMENT_FLAG_BIT_##f,
  foreach_elf_segment_flag
#undef _
} elf_segment_flag_t;

#define foreach_elf32_dynamic_entry_header	\
  _ (u32, type)					\
  _ (u32, data)

#define foreach_elf64_dynamic_entry_header	\
  _ (u64, type)					\
  _ (u64, data)

#define _(t,f) t f;

typedef struct
{
foreach_elf32_dynamic_entry_header} elf32_dynamic_entry_t;

typedef struct
{
foreach_elf64_dynamic_entry_header} elf64_dynamic_entry_t;

#undef _

#define foreach_elf_dynamic_entry_type					\
  _ (END, 0)			/* Marks end of dynamic section */	\
  _ (NEEDED_LIBRARY, 1)		/* Name of needed library */		\
  _ (PLT_RELOCATION_SIZE, 2)	/* Size in bytes of PLT relocs */	\
  _ (PLT_GOT, 3)		/* Processor defined value */		\
  _ (SYMBOL_HASH, 4)		/* Address of symbol hash table */	\
  _ (STRING_TABLE, 5)		/* Address of string table */		\
  _ (SYMBOL_TABLE, 6)		/* Address of symbol table */		\
  _ (RELA_ADDRESS, 7)		/* Address of Rela relocs */		\
  _ (RELA_SIZE, 8)		/* Total size of Rela relocs */		\
  _ (RELA_ENTRY_SIZE, 9)	/* Size of one Rela reloc */		\
  _ (STRING_TABLE_SIZE, 10)	/* Size of string table */		\
  _ (SYMBOL_TABLE_ENTRY_SIZE, 11) /* Size of one symbol table entry */	\
  _ (INIT_FUNCTION, 12)		/* Address of init function */		\
  _ (FINI_FUNCTION, 13)		/* Address of termination function */	\
  _ (SONAME, 14)		/* Name of shared object */		\
  _ (RPATH, 15)			/* Library search path (deprecated) */	\
  _ (SYMBOLIC, 16)		/* Start symbol search here */		\
  _ (REL, 17)			/* Address of Rel relocs */		\
  _ (RELSZ, 18)			/* Total size of Rel relocs */		\
  _ (RELENT, 19)		/* Size of one Rel reloc */		\
  _ (PLT_RELOCATION_TYPE, 20)	/* Type of reloc in PLT */		\
  _ (DEBUG, 21)			/* For debugging; unspecified */	\
  _ (TEXTREL, 22)		/* Reloc might modify .text */		\
  _ (PLT_RELOCATION_ADDRESS, 23) /* Address of PLT relocs */		\
  _ (BIND_NOW, 24)		/* Process relocations of object */	\
  _ (INIT_ARRAY, 25)		/* Array with addresses of init fct */	\
  _ (FINI_ARRAY, 26)		/* Array with addresses of fini fct */	\
  _ (INIT_ARRAYSZ, 27)		/* Size in bytes of DT_INIT_ARRAY */	\
  _ (FINI_ARRAYSZ, 28)		/* Size in bytes of DT_FINI_ARRAY */	\
  _ (RUN_PATH, 29)		/* Library search path */		\
  _ (FLAGS, 30)			/* Flags for object being loaded */	\
  _ (ENCODING, 31)		/* Start of encoded range */		\
  _ (PREINIT_ARRAY, 32)		/* Array with addresses of fns */	\
  _ (PREINIT_ARRAY_SIZE, 33)	/* Size of PREINIT_ARRAY in bytes. */	\
  _ (GNU_PRELINKED, 0x6ffffdf5)	/* Prelinking timestamp */		\
  _ (GNU_CONFLICTSZ, 0x6ffffdf6)	/* Size of conflict section */	\
  _ (GNU_LIBLISTSZ, 0x6ffffdf7)	/* Size of library list */		\
  _ (CHECKSUM, 0x6ffffdf8)						\
  _ (PLTPADSZ, 0x6ffffdf9)						\
  _ (MOVEENT, 0x6ffffdfa)						\
  _ (MOVESZ, 0x6ffffdfb)						\
  _ (FEATURE_1,	0x6ffffdfc)	/* Feature selection (DTF_*).  */	\
  _ (POSFLAG_1,	0x6ffffdfd)	/* Flags for following entries.  */	\
  _ (SYMINSZ, 0x6ffffdfe)	/* Size of syminfo table (in bytes) */	\
  _ (SYMINENT, 0x6ffffdff)	/* Entry size of syminfo */		\
  _ (GNU_HASH, 0x6ffffef5)						\
  _ (GNU_CONFLICT, 0x6ffffef8)	/* Start of conflict section */		\
  _ (GNU_LIBLIST, 0x6ffffef9)	/* Library list */			\
  _ (CONFIG, 0x6ffffefa)	/* Configuration information.  */	\
  _ (DEPAUDIT, 0x6ffffefb)	/* Dependency auditing.  */		\
  _ (AUDIT, 0x6ffffefc)	/* Object auditing.  */				\
  _ (PLTPAD, 0x6ffffefd)	/* PLT padding.  */			\
  _ (MOVETAB, 0x6ffffefe)	/* Move table.  */			\
  _ (SYMINFO, 0x6ffffeff)	/* Syminfo table.  */			\
  _ (VERSYM, 0x6ffffff0)						\
  _ (RELACOUNT, 0x6ffffff9)						\
  _ (RELCOUNT, 0x6ffffffa)						\
  _ (FLAGS_1, 0x6ffffffb)	/* State flags, see DF_1_* below.  */	\
  _ (VERSION_DEF, 0x6ffffffc)	/* Address of version definition table */ \
  _ (VERSION_DEF_COUNT, 0x6ffffffd)	/* Number of version definitions */ \
  _ (VERSION_NEED, 0x6ffffffe)	/* Address of table with needed versions */ \
  _ (VERSION_NEED_COUNT, 0x6fffffff)	/* Number of needed versions */	\
  _ (AUXILIARY, 0x7ffffffd)      /* Shared object to load before self */ \
  _ (FILTER, 0x7fffffff)	/* Shared object to get values from */

typedef enum
{
#define _(f,n) ELF_DYNAMIC_ENTRY_##f = (n),
  foreach_elf_dynamic_entry_type
#undef _
} elf_dynamic_entry_type_t;

/* Values of `d_un.d_val' in the DT_FLAGS entry.  */
#define ELF_DYNAMIC_FLAGS_ORIGIN	(1 << 0)	/* Object may use DF_ORIGIN */
#define ELF_DYNAMIC_FLAGS_SYMBOLIC	(1 << 1)	/* Symbol resolutions starts here */
#define ELF_DYNAMIC_FLAGS_TEXT_RELOCATIONS (1 << 2)	/* Object contains text relocations */
#define ELF_DYNAMIC_FLAGS_BIND_NOW	(1 << 3)	/* No lazy binding for this object */
#define ELF_DYNAMIC_FLAGS_STATIC_TLS	(1 << 4)	/* Module uses the static TLS model */

/* State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1
   entry in the dynamic section.  */
#define DF_1_NOW	0x00000001	/* Set RTLD_NOW for this object.  */
#define DF_1_GLOBAL	0x00000002	/* Set RTLD_GLOBAL for this object.  */
#define DF_1_GROUP	0x00000004	/* Set RTLD_GROUP for this object.  */
#define DF_1_NODELETE	0x00000008	/* Set RTLD_NODELETE for this object. */
#define DF_1_LOADFLTR	0x00000010	/* Trigger filtee loading at runtime. */
#define DF_1_INITFIRST	0x00000020	/* Set RTLD_INITFIRST for this object */
#define DF_1_NOOPEN	0x00000040	/* Set RTLD_NOOPEN for this object.  */
#define DF_1_ORIGIN	0x00000080	/* $ORIGIN must be handled.  */
#define DF_1_DIRECT	0x00000100	/* Direct binding enabled.  */
#define DF_1_TRANS	0x00000200
#define DF_1_INTERPOSE	0x00000400	/* Object is used to interpose.  */
#define DF_1_NODEFLIB	0x00000800	/* Ignore default lib search path.  */
#define DF_1_NODUMP	0x00001000	/* Object can't be dldump'ed.  */
#define DF_1_CONFALT	0x00002000	/* Configuration alternative created. */
#define DF_1_ENDFILTEE	0x00004000	/* Filtee terminates filters search. */
#define	DF_1_DISPRELDNE	0x00008000	/* Disp reloc applied at build time. */
#define	DF_1_DISPRELPND	0x00010000	/* Disp reloc applied at run-time.  */

/* Flags for the feature selection in DT_FEATURE_1.  */
#define DTF_1_PARINIT	0x00000001
#define DTF_1_CONFEXP	0x00000002

/* Flags in the DT_POSFLAG_1 entry effecting only the next DT_* entry.  */
#define DF_P1_LAZYLOAD	0x00000001	/* Lazyload following object.  */
#define DF_P1_GROUPPERM	0x00000002	/* Symbols from next object are not
					   generally available.  */

/* Version definition sections.  */
typedef struct
{
  u16 version;
  u16 flags;
  u16 index;
  u16 aux_count;
  u32 name_hash;
  u32 aux_byte_offset;
  u32 byte_offset_next_version_definition;
} elf_dynamic_version_definition_t;

typedef struct
{
  u32 name;
  u32 next_offset;		/* byte offset of ver def aux next entry */
} elf_dynamic_version_definition_aux_t;

/* Version definition flags. */
#define ELF_DYNAMIC_VERSION_FILE (1 << 0)	/* Version definition of file itself */
#define ELF_DYNAMIC_VERSION_WEAK (1 << 1)	/* Weak version identifier */

/* Version symbol index. */
#define	ELF_DYNAMIC_VERSYM_LOCAL 0	/* Symbol is local.  */
#define	ELF_DYNAMIC_VERSYM_GLOBAL 1	/* Symbol is global.  */
#define	ELF_DYNAMIC_VERSYM_RESERVED_LO	0xff00	/* Beginning of reserved entries.  */
#define	ELF_DYNAMIC_VERSYM_ELIMINATE	0xff01	/* Symbol is to be eliminated.  */

/* Version dependency section.  */
#define foreach_elf_dynamic_version_need_field	\
  _ (u16, version)				\
  _ (u16, aux_count)				\
  _ (u32, file_name_offset)			\
  _ (u32, first_aux_offset)			\
  _ (u32, next_offset)

#define foreach_elf_dynamic_version_need_aux_field	\
  _ (u32, hash)						\
  _ (u16, flags)					\
  _ (u16, versym_index)					\
  _ (u32, name)						\
  _ (u32, next_offset)

typedef struct
{
#define _(t,f) t f;
  foreach_elf_dynamic_version_need_field
#undef _
} elf_dynamic_version_need_t;

typedef struct
{
#define _(t,f) t f;
  foreach_elf_dynamic_version_need_aux_field
#undef _
} elf_dynamic_version_need_aux_t;

typedef union
{
  elf_dynamic_version_need_t need;
  elf_dynamic_version_need_aux_t aux;
} elf_dynamic_version_need_union_t;

/* Note section contents.  Each entry in the note section begins with
   a header of a fixed form.  */

typedef struct
{
  u32 name_size;
  u32 descriptor_size;
  u32 type;
} elf_note_t;

/* Known names of notes.  */

/* Solaris entries in the note section have this name.  */
#define ELF_NOTE_SOLARIS	"SUNW Solaris"

/* Note entries for GNU systems have this name.  */
#define ELF_NOTE_GNU		"GNU"


/* Defined types of notes for Solaris.  */

/* Value of descriptor (one word) is desired pagesize for the binary.  */
#define ELF_NOTE_PAGESIZE_HINT	1


/* Defined note types for GNU systems.  */

/* ABI information.  The descriptor consists of words:
   word 0: OS descriptor
   word 1: major version of the ABI
   word 2: minor version of the ABI
   word 3: subminor version of the ABI
*/
#ifndef ELF_NOTE_ABI
#define ELF_NOTE_ABI		1
#endif

/* Known OSes.  These value can appear in word 0 of an ELF_NOTE_ABI
   note section entry.  */
#define ELF_NOTE_OS_LINUX	0
#define ELF_NOTE_OS_GNU		1
#define ELF_NOTE_OS_SOLARIS2	2
#define ELF_NOTE_OS_FREEBSD	3

/* AMD x86-64 relocations.  */
#define foreach_elf_x86_64_relocation_type				\
  _ (NONE, 0)			/* No reloc */				\
  _ (DIRECT_64, 1)		/* Direct 64 bit  */			\
  _ (PC_REL_I32, 2)	        /* PC relative 32 bit signed */		\
  _ (GOT_REL_32, 3)		/* 32 bit GOT entry */			\
  _ (PLT_REL_32, 4)		/* 32 bit PLT address */		\
  _ (COPY, 5)			/* Copy symbol at runtime */		\
  _ (CREATE_GOT, 6)		/* Create GOT entry */			\
  _ (CREATE_PLT, 7)		/* Create PLT entry */			\
  _ (RELATIVE, 8)		/* Adjust by program base */		\
  _ (PC_REL_I32_GOT, 9)	/* 32 bit PC relative offset to GOT */		\
  _ (DIRECT_U32, 10)		/* Direct 32 bit zero extended */	\
  _ (DIRECT_I32, 11)		/* Direct 32 bit sign extended */	\
  _ (DIRECT_U16, 12)		/* Direct 16 bit zero extended */	\
  _ (PC_REL_I16, 13)	/* 16 bit sign extended pc relative */		\
  _ (DIRECT_I8, 14)		/* Direct 8 bit sign extended  */	\
  _ (PC_REL_I8, 15)	/* 8 bit sign extended pc relative */		\
  _ (DTPMOD64, 16)		/* ID of module containing symbol */	\
  _ (DTPOFF64, 17)		/* Offset in module's TLS block */	\
  _ (TPOFF64, 18)		/* Offset in initial TLS block */	\
  _ (TLSGD, 19)	/* 32 bit signed PC relative offset to two GOT entries for GD symbol */	\
  _ (TLSLD, 20) /* 32 bit signed PC relative offset to two GOT entries for LD symbol */	\
  _ (DTPOFF32, 21)		/* Offset in TLS block */		\
  _ (GOTTPOFF, 22) /* 32 bit signed PC relative offset to GOT entry for IE symbol */ \
  _ (TPOFF32, 23)		/* Offset in initial TLS, block) */

typedef struct
{
  elf64_symbol_t *symbols;

  u32 section_index;

  u8 *string_table;

  uword *symbol_by_name;
} elf_symbol_table_t;

always_inline void
elf_symbol_table_free (elf_symbol_table_t * s)
{
  vec_free (s->symbols);
  hash_free (s->symbol_by_name);
}

always_inline u8 *
elf_symbol_name (elf_symbol_table_t * t, elf64_symbol_t * sym)
{
  return vec_elt_at_index (t->string_table, sym->name);
}

typedef struct
{
  elf_relocation_with_addend_t *relocations;

  u32 section_index;
} elf_relocation_table_t;

always_inline void
elf_relocation_table_free (elf_relocation_table_t * r)
{
  vec_free (r->relocations);
}

typedef struct
{
  elf64_section_header_t header;

  u32 index;

  /* Index of segments containing this section. */
  uword *segment_index_bitmap;

  /* Aligned size (included padding not included in
     header.file_size). */
  u64 align_size;

  i64 exec_address_change;

  u8 *contents;
} elf_section_t;

typedef struct
{
  elf64_segment_header_t header;

  /* Sections contained in this segment. */
  uword *section_index_bitmap;

  u32 index;

  u8 *contents;
} elf_segment_t;

typedef struct
{
  u8 need_byte_swap;

  u8 parsed_symbols;

  char *file_name;

  elf_first_header_t first_header;

  elf64_file_header_t file_header;

  elf_segment_t *segments;

  elf_section_t *sections;

  uword *section_by_name;
  uword *section_by_start_address;

  elf_symbol_table_t *symbol_tables;
  elf_relocation_table_t *relocation_tables;

  char *interpreter;

  elf64_dynamic_entry_t *dynamic_entries;
  u8 *dynamic_string_table;
  u32 dynamic_string_table_section_index;
  u32 dynamic_symbol_table_section_index;
  u32 dynamic_symbol_table_index;
  u32 dynamic_section_index;
  u16 *versym;
  u32 versym_section_index;
  elf_dynamic_version_need_union_t *verneed;
  u32 verneed_section_index;
} elf_main_t;

always_inline void
elf_main_init (elf_main_t * em)
{
  clib_memset (em, 0, sizeof (em[0]));
}

always_inline void
elf_main_free (elf_main_t * em)
{
  uword i;

  for (i = 0; i < vec_len (em->segments); i++)
    vec_free (em->segments[i].contents);
  vec_free (em->segments);

  for (i = 0; i < vec_len (em->sections); i++)
    vec_free (em->sections[i].contents);
  vec_free (em->sections);

  hash_free (em->section_by_name);
  for (i = 0; i < vec_len (em->symbol_tables); i++)
    elf_symbol_table_free (em->symbol_tables + i);
  for (i = 0; i < vec_len (em->relocation_tables); i++)
    elf_relocation_table_free (em->relocation_tables + i);

  vec_free (em->dynamic_entries);
  vec_free (em->interpreter);
}

always_inline void
elf_get_segment_contents (elf_main_t * em, void *data, uword segment_index)
{
  elf_segment_t *g = vec_elt_at_index (em->segments, segment_index);
  if (!g->contents)
    vec_add (g->contents, data + g->header.file_offset,
	     g->header.memory_size);
}

always_inline void *
elf_get_section_contents (elf_main_t * em,
			  uword section_index, uword elt_size)
{
  elf_section_t *s;
  void *result;

  s = vec_elt_at_index (em->sections, section_index);

  result = 0;
  if (vec_len (s->contents) > 0)
    {
      /* Make vector copy of contents with given element size. */
      result =
	_vec_realloc (result, vec_len (s->contents) / elt_size, elt_size,
		      /* header_bytes */ 0, /* align */ 0, 0);
      clib_memcpy (result, s->contents, vec_len (s->contents));
    }

  return result;
}

always_inline void
elf_set_section_contents (elf_main_t * em,
			  uword section_index,
			  void *new_contents, uword n_content_bytes)
{
  elf_section_t *s;

  s = vec_elt_at_index (em->sections, section_index);
  vec_free (s->contents);
  vec_add (s->contents, new_contents, n_content_bytes);
}

always_inline u8 *
elf_section_name (elf_main_t * em, elf_section_t * s)
{
  elf_section_t *es = vec_elt_at_index (em->sections,
					em->
					file_header.section_header_string_table_index);
  return vec_elt_at_index (es->contents, s->header.name);
}

always_inline u8
elf_swap_u8 (elf_main_t * em, u8 x)
{
  return x;
}

always_inline u16
elf_swap_u16 (elf_main_t * em, u16 x)
{
  return em->need_byte_swap ? clib_byte_swap_u16 (x) : x;
}

always_inline u32
elf_swap_u32 (elf_main_t * em, u32 x)
{
  return em->need_byte_swap ? clib_byte_swap_u32 (x) : x;
}

always_inline u64
elf_swap_u64 (elf_main_t * em, u64 x)
{
  return em->need_byte_swap ? clib_byte_swap_u64 (x) : x;
}

#define FORMAT_ELF_MAIN_SYMBOLS (1 << 0)
#define FORMAT_ELF_MAIN_RELOCATIONS (1 << 1)
#define FORMAT_ELF_MAIN_DYNAMIC (1 << 2)

format_function_t format_elf_main;
format_function_t format_elf_symbol;

clib_error_t *elf_read_file (elf_main_t * em, char *file_name);
clib_error_t *elf_write_file (elf_main_t * em, char *file_name);
clib_error_t *elf_delete_named_section (elf_main_t * em, char *section_name);
clib_error_t *elf_parse (elf_main_t * em, void *data, uword data_bytes);
void elf_parse_symbols (elf_main_t * em);

clib_error_t *elf_get_section_by_name (elf_main_t * em, char *section_name,
				       elf_section_t ** result);
clib_error_t *elf_get_section_by_start_address (elf_main_t * em,
						uword start_address,
						elf_section_t ** result);

void
elf_create_section_with_contents (elf_main_t * em,
				  char *section_name,
				  elf64_section_header_t * header,
				  void *contents, uword n_content_bytes);
uword elf_delete_segment_with_type (elf_main_t * em,
				    elf_segment_type_t segment_type);
void elf_set_dynamic_entries (elf_main_t * em);

#endif /* included_clib_elf_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */