-
Notifications
You must be signed in to change notification settings - Fork 572
/
Copy pathelfedit.c
1105 lines (954 loc) · 28.1 KB
/
elfedit.c
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
/* elfedit.c -- Update the ELF header of an ELF format file
Copyright (C) 2010-2025 Free Software Foundation, Inc.
This file is part of GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#include "config.h"
#include "sysdep.h"
#include "libiberty.h"
#include <assert.h>
#if __GNUC__ >= 2
/* Define BFD64 here, even if our default architecture is 32 bit ELF
as this will allow us to read in and parse 64bit and 32bit ELF files.
Only do this if we believe that the compiler can support a 64 bit
data type. For now we only rely on GCC being able to do this. */
#define BFD64
#endif
#include "bfd.h"
#include "elfcomm.h"
#include "bucomm.h"
#include "elf/common.h"
#include "elf/external.h"
#include "elf/internal.h"
#include "getopt.h"
#include "libiberty.h"
#include "safe-ctype.h"
#include "filenames.h"
char * program_name = "elfedit";
static long archive_file_offset;
static unsigned long archive_file_size;
static Elf_Internal_Ehdr elf_header;
static Elf32_External_Ehdr ehdr32;
static Elf64_External_Ehdr ehdr64;
static int input_elf_machine = -1;
static int output_elf_machine = -1;
static int input_elf_type = -1;
static int output_elf_type = -1;
static int input_elf_osabi = -1;
static int output_elf_osabi = -1;
static int input_elf_abiversion = -1;
static int output_elf_abiversion = -1;
enum elfclass
{
ELF_CLASS_UNKNOWN = -1,
ELF_CLASS_NONE = ELFCLASSNONE,
ELF_CLASS_32 = ELFCLASS32,
ELF_CLASS_64 = ELFCLASS64,
ELF_CLASS_BOTH
};
static enum elfclass input_elf_class = ELF_CLASS_UNKNOWN;
static enum elfclass output_elf_class = ELF_CLASS_BOTH;
#ifdef HAVE_MMAP
#include <sys/mman.h>
static unsigned int enable_x86_features;
static unsigned int disable_x86_features;
static int
update_gnu_property (const char *file_name, FILE *file)
{
char *map;
Elf_Internal_Phdr *phdrs;
struct stat st_buf;
unsigned int i;
int ret;
if (!enable_x86_features && !disable_x86_features)
return 0;
if (elf_header.e_machine != EM_386
&& elf_header.e_machine != EM_X86_64)
{
error (_("%s: Not an i386 nor x86-64 ELF file\n"), file_name);
return 0;
}
if (fstat (fileno (file), &st_buf) < 0)
{
error (_("%s: stat () failed\n"), file_name);
return 1;
}
map = mmap (NULL, st_buf.st_size, PROT_READ | PROT_WRITE,
MAP_SHARED, fileno (file), 0);
if (map == MAP_FAILED)
{
error (_("%s: mmap () failed\n"), file_name);
return 0;
}
phdrs = xmalloc (elf_header.e_phnum * sizeof (*phdrs));
if (elf_header.e_ident[EI_CLASS] == ELFCLASS32)
{
Elf32_External_Phdr *phdrs32
= (Elf32_External_Phdr *) (map + elf_header.e_phoff);
for (i = 0; i < elf_header.e_phnum; i++)
{
phdrs[i].p_type = BYTE_GET (phdrs32[i].p_type);
phdrs[i].p_offset = BYTE_GET (phdrs32[i].p_offset);
phdrs[i].p_vaddr = BYTE_GET (phdrs32[i].p_vaddr);
phdrs[i].p_paddr = BYTE_GET (phdrs32[i].p_paddr);
phdrs[i].p_filesz = BYTE_GET (phdrs32[i].p_filesz);
phdrs[i].p_memsz = BYTE_GET (phdrs32[i].p_memsz);
phdrs[i].p_flags = BYTE_GET (phdrs32[i].p_flags);
phdrs[i].p_align = BYTE_GET (phdrs32[i].p_align);
}
}
else
{
Elf64_External_Phdr *phdrs64
= (Elf64_External_Phdr *) (map + elf_header.e_phoff);
for (i = 0; i < elf_header.e_phnum; i++)
{
phdrs[i].p_type = BYTE_GET (phdrs64[i].p_type);
phdrs[i].p_offset = BYTE_GET (phdrs64[i].p_offset);
phdrs[i].p_vaddr = BYTE_GET (phdrs64[i].p_vaddr);
phdrs[i].p_paddr = BYTE_GET (phdrs64[i].p_paddr);
phdrs[i].p_filesz = BYTE_GET (phdrs64[i].p_filesz);
phdrs[i].p_memsz = BYTE_GET (phdrs64[i].p_memsz);
phdrs[i].p_flags = BYTE_GET (phdrs64[i].p_flags);
phdrs[i].p_align = BYTE_GET (phdrs64[i].p_align);
}
}
ret = 0;
for (i = 0; i < elf_header.e_phnum; i++)
if (phdrs[i].p_type == PT_NOTE)
{
size_t offset = phdrs[i].p_offset;
size_t size = phdrs[i].p_filesz;
size_t align = phdrs[i].p_align;
char *buf = map + offset;
char *p = buf;
while (p < buf + size)
{
Elf_External_Note *xnp = (Elf_External_Note *) p;
Elf_Internal_Note in;
if (offsetof (Elf_External_Note, name) > buf - p + size)
{
ret = 1;
goto out;
}
in.type = BYTE_GET (xnp->type);
in.namesz = BYTE_GET (xnp->namesz);
in.namedata = xnp->name;
if (in.namesz > buf - in.namedata + size)
{
ret = 1;
goto out;
}
in.descsz = BYTE_GET (xnp->descsz);
in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align);
in.descpos = offset + (in.descdata - buf);
if (in.descsz != 0
&& (in.descdata >= buf + size
|| in.descsz > buf - in.descdata + size))
{
ret = 1;
goto out;
}
if (in.namesz == sizeof "GNU"
&& strcmp (in.namedata, "GNU") == 0
&& in.type == NT_GNU_PROPERTY_TYPE_0)
{
unsigned char *ptr;
unsigned char *ptr_end;
if (in.descsz < 8 || (in.descsz % align) != 0)
{
ret = 1;
goto out;
}
ptr = (unsigned char *) in.descdata;
ptr_end = ptr + in.descsz;
do
{
unsigned int type = byte_get (ptr, 4);
unsigned int datasz = byte_get (ptr + 4, 4);
unsigned int bitmask, old_bitmask;
ptr += 8;
if ((ptr + datasz) > ptr_end)
{
ret = 1;
goto out;
}
if (type == GNU_PROPERTY_X86_FEATURE_1_AND)
{
if (datasz != 4)
{
ret = 1;
goto out;
}
old_bitmask = byte_get (ptr, 4);
bitmask = old_bitmask;
if (enable_x86_features)
bitmask |= enable_x86_features;
if (disable_x86_features)
bitmask &= ~disable_x86_features;
if (old_bitmask != bitmask)
byte_put (ptr, bitmask, 4);
goto out;
}
ptr += ELF_ALIGN_UP (datasz, align);
}
while ((ptr_end - ptr) >= 8);
}
p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align);
}
}
out:
if (ret != 0)
error (_("%s: Invalid PT_NOTE segment\n"), file_name);
free (phdrs);
munmap (map, st_buf.st_size);
return ret;
}
/* Set enable_x86_features and disable_x86_features for a feature
string, FEATURE. */
static int
elf_x86_feature (const char *feature, int enable)
{
unsigned int x86_feature;
if (strcasecmp (feature, "ibt") == 0)
x86_feature = GNU_PROPERTY_X86_FEATURE_1_IBT;
else if (strcasecmp (feature, "shstk") == 0)
x86_feature = GNU_PROPERTY_X86_FEATURE_1_SHSTK;
else if (strcasecmp (feature, "lam_u48") == 0)
x86_feature = GNU_PROPERTY_X86_FEATURE_1_LAM_U48;
else if (strcasecmp (feature, "lam_u57") == 0)
x86_feature = GNU_PROPERTY_X86_FEATURE_1_LAM_U57;
else
{
error (_("Unknown x86 feature: %s\n"), feature);
return -1;
}
if (enable)
{
enable_x86_features |= x86_feature;
disable_x86_features &= ~x86_feature;
}
else
{
disable_x86_features |= x86_feature;
enable_x86_features &= ~x86_feature;
}
return 0;
}
#endif
/* Return ELF class for a machine type, MACH. */
static enum elfclass
elf_class (int mach)
{
switch (mach)
{
case EM_386:
case EM_IAMCU:
return ELF_CLASS_32;
case EM_L1OM:
case EM_K1OM:
return ELF_CLASS_64;
case EM_X86_64:
case EM_NONE:
return ELF_CLASS_BOTH;
default:
return ELF_CLASS_BOTH;
}
}
static int
update_elf_header (const char *file_name, FILE *file)
{
int class, machine, type, status, osabi, abiversion;
if (elf_header.e_ident[EI_VERSION] != EV_CURRENT)
{
error
(_("%s: Unsupported EI_VERSION: %d is not %d\n"),
file_name, elf_header.e_ident[EI_VERSION],
EV_CURRENT);
return 0;
}
/* Return if e_machine is the same as output_elf_machine. */
if (output_elf_machine == elf_header.e_machine)
return 1;
class = elf_header.e_ident[EI_CLASS];
machine = elf_header.e_machine;
/* Skip if class doesn't match. */
if (input_elf_class == ELF_CLASS_UNKNOWN)
input_elf_class = elf_class (machine);
if (input_elf_class != ELF_CLASS_BOTH
&& (int) input_elf_class != class)
{
error
(_("%s: Unmatched input EI_CLASS: %d is not %d\n"),
file_name, class, input_elf_class);
return 0;
}
if (output_elf_class != ELF_CLASS_BOTH
&& (int) output_elf_class != class)
{
error
(_("%s: Unmatched output EI_CLASS: %d is not %d\n"),
file_name, class, output_elf_class);
return 0;
}
/* Skip if e_machine doesn't match. */
if (input_elf_machine != -1 && machine != input_elf_machine)
{
error
(_("%s: Unmatched e_machine: %d is not %d\n"),
file_name, machine, input_elf_machine);
return 0;
}
type = elf_header.e_type;
/* Skip if e_type doesn't match. */
if (input_elf_type != -1 && type != input_elf_type)
{
error
(_("%s: Unmatched e_type: %d is not %d\n"),
file_name, type, input_elf_type);
return 0;
}
osabi = elf_header.e_ident[EI_OSABI];
/* Skip if OSABI doesn't match. */
if (input_elf_osabi != -1 && osabi != input_elf_osabi)
{
error
(_("%s: Unmatched EI_OSABI: %d is not %d\n"),
file_name, osabi, input_elf_osabi);
return 0;
}
abiversion = elf_header.e_ident[EI_ABIVERSION];
/* Skip if ABIVERSION doesn't match. */
if (input_elf_abiversion != -1
&& abiversion != input_elf_abiversion)
{
error
(_("%s: Unmatched EI_ABIVERSION: %d is not %d\n"),
file_name, abiversion, input_elf_abiversion);
return 0;
}
/* Update e_machine, e_type and EI_OSABI. */
switch (class)
{
default:
/* We should never get here. */
abort ();
break;
case ELFCLASS32:
if (output_elf_machine != -1)
BYTE_PUT (ehdr32.e_machine, output_elf_machine);
if (output_elf_type != -1)
BYTE_PUT (ehdr32.e_type, output_elf_type);
if (output_elf_osabi != -1)
ehdr32.e_ident[EI_OSABI] = output_elf_osabi;
if (output_elf_abiversion != -1)
ehdr32.e_ident[EI_ABIVERSION] = output_elf_abiversion;
status = fwrite (&ehdr32, sizeof (ehdr32), 1, file) == 1;
break;
case ELFCLASS64:
if (output_elf_machine != -1)
BYTE_PUT (ehdr64.e_machine, output_elf_machine);
if (output_elf_type != -1)
BYTE_PUT (ehdr64.e_type, output_elf_type);
if (output_elf_osabi != -1)
ehdr64.e_ident[EI_OSABI] = output_elf_osabi;
if (output_elf_abiversion != -1)
ehdr64.e_ident[EI_ABIVERSION] = output_elf_abiversion;
status = fwrite (&ehdr64, sizeof (ehdr64), 1, file) == 1;
break;
}
if (status != 1)
error (_("%s: Failed to update ELF header: %s\n"),
file_name, strerror (errno));
return status;
}
static int
get_file_header (FILE * file)
{
/* Read in the identity array. */
if (fread (elf_header.e_ident, EI_NIDENT, 1, file) != 1)
return 0;
if (elf_header.e_ident[EI_MAG0] != ELFMAG0
|| elf_header.e_ident[EI_MAG1] != ELFMAG1
|| elf_header.e_ident[EI_MAG2] != ELFMAG2
|| elf_header.e_ident[EI_MAG3] != ELFMAG3)
return 0;
/* Determine how to read the rest of the header. */
switch (elf_header.e_ident[EI_DATA])
{
default: /* fall through */
case ELFDATANONE: /* fall through */
case ELFDATA2LSB:
byte_get = byte_get_little_endian;
byte_put = byte_put_little_endian;
break;
case ELFDATA2MSB:
byte_get = byte_get_big_endian;
byte_put = byte_put_big_endian;
break;
}
/* Read in the rest of the header. For now we only support 32 bit
and 64 bit ELF files. */
switch (elf_header.e_ident[EI_CLASS])
{
default:
return 0;
case ELFCLASS32:
if (fread (ehdr32.e_type, sizeof (ehdr32) - EI_NIDENT,
1, file) != 1)
return 0;
elf_header.e_type = BYTE_GET (ehdr32.e_type);
elf_header.e_machine = BYTE_GET (ehdr32.e_machine);
elf_header.e_version = BYTE_GET (ehdr32.e_version);
elf_header.e_entry = BYTE_GET (ehdr32.e_entry);
elf_header.e_phoff = BYTE_GET (ehdr32.e_phoff);
elf_header.e_shoff = BYTE_GET (ehdr32.e_shoff);
elf_header.e_flags = BYTE_GET (ehdr32.e_flags);
elf_header.e_ehsize = BYTE_GET (ehdr32.e_ehsize);
elf_header.e_phentsize = BYTE_GET (ehdr32.e_phentsize);
elf_header.e_phnum = BYTE_GET (ehdr32.e_phnum);
elf_header.e_shentsize = BYTE_GET (ehdr32.e_shentsize);
elf_header.e_shnum = BYTE_GET (ehdr32.e_shnum);
elf_header.e_shstrndx = BYTE_GET (ehdr32.e_shstrndx);
memcpy (&ehdr32, &elf_header, EI_NIDENT);
break;
case ELFCLASS64:
/* If we have been compiled with sizeof (bfd_vma) == 4, then
we will not be able to cope with the 64bit data found in
64 ELF files. Detect this now and abort before we start
overwriting things. */
if (sizeof (bfd_vma) < 8)
{
error (_("This executable has been built without support for a\n\
64 bit data type and so it cannot process 64 bit ELF files.\n"));
return 0;
}
if (fread (ehdr64.e_type, sizeof (ehdr64) - EI_NIDENT,
1, file) != 1)
return 0;
elf_header.e_type = BYTE_GET (ehdr64.e_type);
elf_header.e_machine = BYTE_GET (ehdr64.e_machine);
elf_header.e_version = BYTE_GET (ehdr64.e_version);
elf_header.e_entry = BYTE_GET (ehdr64.e_entry);
elf_header.e_phoff = BYTE_GET (ehdr64.e_phoff);
elf_header.e_shoff = BYTE_GET (ehdr64.e_shoff);
elf_header.e_flags = BYTE_GET (ehdr64.e_flags);
elf_header.e_ehsize = BYTE_GET (ehdr64.e_ehsize);
elf_header.e_phentsize = BYTE_GET (ehdr64.e_phentsize);
elf_header.e_phnum = BYTE_GET (ehdr64.e_phnum);
elf_header.e_shentsize = BYTE_GET (ehdr64.e_shentsize);
elf_header.e_shnum = BYTE_GET (ehdr64.e_shnum);
elf_header.e_shstrndx = BYTE_GET (ehdr64.e_shstrndx);
memcpy (&ehdr64, &elf_header, EI_NIDENT);
break;
}
return 1;
}
/* Process one ELF object file according to the command line options.
This file may actually be stored in an archive. The file is
positioned at the start of the ELF object. */
static int
process_object (const char *file_name, FILE *file)
{
/* Rememeber where we are. */
long offset = ftell (file);
if (! get_file_header (file))
{
error (_("%s: Failed to read ELF header\n"), file_name);
return 1;
}
/* Go to the position of the ELF header. */
if (fseek (file, offset, SEEK_SET) != 0)
{
error (_("%s: Failed to seek to ELF header\n"), file_name);
}
if (! update_elf_header (file_name, file))
return 1;
return 0;
}
/* Process an ELF archive.
On entry the file is positioned just after the ARMAG string. */
static int
process_archive (const char * file_name, FILE * file,
bool is_thin_archive)
{
struct archive_info arch;
struct archive_info nested_arch;
size_t got;
int ret;
struct stat statbuf;
/* The ARCH structure is used to hold information about this archive. */
arch.file_name = NULL;
arch.file = NULL;
arch.index_array = NULL;
arch.sym_table = NULL;
arch.longnames = NULL;
/* The NESTED_ARCH structure is used as a single-item cache of information
about a nested archive (when members of a thin archive reside within
another regular archive file). */
nested_arch.file_name = NULL;
nested_arch.file = NULL;
nested_arch.index_array = NULL;
nested_arch.sym_table = NULL;
nested_arch.longnames = NULL;
if (fstat (fileno (file), &statbuf) < 0
|| setup_archive (&arch, file_name, file, statbuf.st_size,
is_thin_archive, false) != 0)
{
ret = 1;
goto out;
}
ret = 0;
while (1)
{
char * name;
size_t namelen;
char * qualified_name;
/* Read the next archive header. */
if (fseek (file, arch.next_arhdr_offset, SEEK_SET) != 0)
{
error (_("%s: failed to seek to next archive header\n"),
file_name);
return 1;
}
got = fread (&arch.arhdr, 1, sizeof arch.arhdr, file);
if (got != sizeof arch.arhdr)
{
if (got == 0)
break;
error (_("%s: failed to read archive header\n"),
file_name);
ret = 1;
break;
}
if (memcmp (arch.arhdr.ar_fmag, ARFMAG, 2) != 0)
{
error (_("%s: did not find a valid archive header\n"),
arch.file_name);
ret = 1;
break;
}
arch.next_arhdr_offset += sizeof arch.arhdr;
archive_file_size = strtoul (arch.arhdr.ar_size, NULL, 10);
if (archive_file_size & 01)
++archive_file_size;
name = get_archive_member_name (&arch, &nested_arch);
if (name == NULL)
{
error (_("%s: bad archive file name\n"), file_name);
ret = 1;
break;
}
namelen = strlen (name);
qualified_name = make_qualified_name (&arch, &nested_arch, name);
if (qualified_name == NULL)
{
error (_("%s: bad archive file name\n"), file_name);
free (name);
ret = 1;
break;
}
if (is_thin_archive && arch.nested_member_origin == 0)
{
/* This is a proxy for an external member of a thin archive. */
FILE *member_file;
char *member_file_name = adjust_relative_path (file_name,
name, namelen);
free (name);
if (member_file_name == NULL)
{
free (qualified_name);
ret = 1;
break;
}
member_file = fopen (member_file_name, "r+b");
if (member_file == NULL)
{
error (_("Input file '%s' is not readable\n"),
member_file_name);
free (member_file_name);
free (qualified_name);
ret = 1;
break;
}
archive_file_offset = arch.nested_member_origin;
ret |= process_object (qualified_name, member_file);
fclose (member_file);
free (member_file_name);
}
else if (is_thin_archive)
{
free (name);
/* This is a proxy for a member of a nested archive. */
archive_file_offset = arch.nested_member_origin + sizeof arch.arhdr;
/* The nested archive file will have been opened and setup by
get_archive_member_name. */
if (fseek (nested_arch.file, archive_file_offset,
SEEK_SET) != 0)
{
error (_("%s: failed to seek to archive member\n"),
nested_arch.file_name);
free (qualified_name);
ret = 1;
break;
}
ret |= process_object (qualified_name, nested_arch.file);
}
else
{
free (name);
archive_file_offset = arch.next_arhdr_offset;
arch.next_arhdr_offset += archive_file_size;
ret |= process_object (qualified_name, file);
}
free (qualified_name);
}
out:
if (nested_arch.file != NULL)
fclose (nested_arch.file);
release_archive (&nested_arch);
release_archive (&arch);
return ret;
}
static int
check_file (const char *file_name, struct stat *statbuf_p)
{
struct stat statbuf;
if (statbuf_p == NULL)
statbuf_p = &statbuf;
if (stat (file_name, statbuf_p) < 0)
{
if (errno == ENOENT)
error (_("'%s': No such file\n"), file_name);
else
error (_("Could not locate '%s'. System error message: %s\n"),
file_name, strerror (errno));
return 1;
}
#if defined (_WIN32) && !defined (__CYGWIN__)
else if (statbuf_p->st_size == 0)
{
/* MS-Windows 'stat' reports the null device as a regular file;
fix that. */
int fd = open (file_name, O_RDONLY | O_BINARY);
if (isatty (fd))
{
statbuf_p->st_mode &= ~S_IFREG;
statbuf_p->st_mode |= S_IFCHR;
}
}
#endif
if (! S_ISREG (statbuf_p->st_mode))
{
error (_("'%s' is not an ordinary file\n"), file_name);
return 1;
}
return 0;
}
static int
process_file (const char *file_name)
{
FILE * file;
char armag[SARMAG];
int ret;
if (check_file (file_name, NULL))
return 1;
file = fopen (file_name, "r+b");
if (file == NULL)
{
error (_("Input file '%s' is not readable\n"), file_name);
return 1;
}
if (fread (armag, SARMAG, 1, file) != 1)
{
error (_("%s: Failed to read file's magic number\n"),
file_name);
fclose (file);
return 1;
}
if (memcmp (armag, ARMAG, SARMAG) == 0)
ret = process_archive (file_name, file, false);
else if (memcmp (armag, ARMAGT, SARMAG) == 0)
ret = process_archive (file_name, file, true);
else
{
rewind (file);
archive_file_size = archive_file_offset = 0;
ret = process_object (file_name, file);
#ifdef HAVE_MMAP
if (!ret
&& (elf_header.e_type == ET_EXEC
|| elf_header.e_type == ET_DYN))
ret = update_gnu_property (file_name, file);
#endif
}
fclose (file);
return ret;
}
static const struct
{
int osabi;
const char *name;
}
osabis[] =
{
{ ELFOSABI_NONE, "none" },
{ ELFOSABI_HPUX, "HPUX" },
{ ELFOSABI_NETBSD, "NetBSD" },
{ ELFOSABI_GNU, "GNU" },
{ ELFOSABI_GNU, "Linux" },
{ ELFOSABI_SOLARIS, "Solaris" },
{ ELFOSABI_AIX, "AIX" },
{ ELFOSABI_IRIX, "Irix" },
{ ELFOSABI_FREEBSD, "FreeBSD" },
{ ELFOSABI_TRU64, "TRU64" },
{ ELFOSABI_MODESTO, "Modesto" },
{ ELFOSABI_OPENBSD, "OpenBSD" },
{ ELFOSABI_OPENVMS, "OpenVMS" },
{ ELFOSABI_NSK, "NSK" },
{ ELFOSABI_AROS, "AROS" },
{ ELFOSABI_FENIXOS, "FenixOS" }
};
/* Return ELFOSABI_XXX for an OSABI string, OSABI. */
static int
elf_osabi (const char *osabi)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE (osabis); i++)
if (strcasecmp (osabi, osabis[i].name) == 0)
return osabis[i].osabi;
error (_("Unknown OSABI: %s\n"), osabi);
return -1;
}
/* Return EM_XXX for a machine string, MACH. */
static int
elf_machine (const char *mach)
{
if (strcasecmp (mach, "i386") == 0)
return EM_386;
if (strcasecmp (mach, "iamcu") == 0)
return EM_IAMCU;
if (strcasecmp (mach, "l1om") == 0)
return EM_L1OM;
if (strcasecmp (mach, "k1om") == 0)
return EM_K1OM;
if (strcasecmp (mach, "x86_64") == 0)
return EM_X86_64;
if (strcasecmp (mach, "x86-64") == 0)
return EM_X86_64;
if (strcasecmp (mach, "none") == 0)
return EM_NONE;
error (_("Unknown machine type: %s\n"), mach);
return -1;
}
/* Return ET_XXX for a type string, TYPE. */
static int
elf_type (const char *type)
{
if (strcasecmp (type, "rel") == 0)
return ET_REL;
if (strcasecmp (type, "exec") == 0)
return ET_EXEC;
if (strcasecmp (type, "dyn") == 0)
return ET_DYN;
if (strcasecmp (type, "none") == 0)
return ET_NONE;
error (_("Unknown type: %s\n"), type);
return -1;
}
enum command_line_switch
{
OPTION_INPUT_MACH = 150,
OPTION_OUTPUT_MACH,
OPTION_INPUT_TYPE,
OPTION_OUTPUT_TYPE,
OPTION_INPUT_OSABI,
OPTION_OUTPUT_OSABI,
OPTION_INPUT_ABIVERSION,
OPTION_OUTPUT_ABIVERSION,
#ifdef HAVE_MMAP
OPTION_ENABLE_X86_FEATURE,
OPTION_DISABLE_X86_FEATURE,
#endif
};
static struct option options[] =
{
{"input-mach", required_argument, 0, OPTION_INPUT_MACH},
{"output-mach", required_argument, 0, OPTION_OUTPUT_MACH},
{"input-type", required_argument, 0, OPTION_INPUT_TYPE},
{"output-type", required_argument, 0, OPTION_OUTPUT_TYPE},
{"input-osabi", required_argument, 0, OPTION_INPUT_OSABI},
{"output-osabi", required_argument, 0, OPTION_OUTPUT_OSABI},
{"input-abiversion", required_argument, 0, OPTION_INPUT_ABIVERSION},
{"output-abiversion", required_argument, 0, OPTION_OUTPUT_ABIVERSION},
#ifdef HAVE_MMAP
{"enable-x86-feature",
required_argument, 0, OPTION_ENABLE_X86_FEATURE},
{"disable-x86-feature",
required_argument, 0, OPTION_DISABLE_X86_FEATURE},
#endif
{"version", no_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{0, no_argument, 0, 0}
};
ATTRIBUTE_NORETURN static void
usage (FILE *stream, int exit_status)
{
unsigned int i;
char *osabi = concat (osabis[0].name, NULL);
for (i = 1; i < ARRAY_SIZE (osabis); i++)
osabi = reconcat (osabi, osabi, "|", osabis[i].name, NULL);
fprintf (stream, _("Usage: %s <option(s)> elffile(s)\n"),
program_name);
fprintf (stream, _(" Update the ELF header of ELF files\n"));
fprintf (stream, _(" The options are:\n"));
fprintf (stream, _("\
--input-mach [none|i386|iamcu|l1om|k1om|x86_64]\n\
Set input machine type\n\
--output-mach [none|i386|iamcu|l1om|k1om|x86_64]\n\
Set output machine type\n\
--input-type [none|rel|exec|dyn]\n\
Set input file type\n\
--output-type [none|rel|exec|dyn]\n\
Set output file type\n\
--input-osabi [%s]\n\
Set input OSABI\n\
--output-osabi [%s]\n\
Set output OSABI\n\
--input-abiversion [0-255] Set input ABIVERSION\n\
--output-abiversion [0-255] Set output ABIVERSION\n"),
osabi, osabi);
#ifdef HAVE_MMAP
fprintf (stream, _("\
--enable-x86-feature [ibt|shstk|lam_u48|lam_u57]\n\
Enable x86 feature\n\
--disable-x86-feature [ibt|shstk|lam_u48|lam_u57]\n\
Disable x86 feature\n"));
#endif
fprintf (stream, _("\
-h --help Display this information\n\
-v --version Display the version number of %s\n\
"),
program_name);
if (REPORT_BUGS_TO[0] && exit_status == 0)
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
free (osabi);
exit (exit_status);
}
int
main (int argc, char ** argv)
{
int c, status;
char *end;
#ifdef HAVE_LC_MESSAGES
setlocale (LC_MESSAGES, "");
#endif
setlocale (LC_CTYPE, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
expandargv (&argc, &argv);
while ((c = getopt_long (argc, argv, "hv",
options, (int *) 0)) != EOF)
{
switch (c)
{