forked from uclinux-dev/elf2flt
-
Notifications
You must be signed in to change notification settings - Fork 0
/
elf2flt.c
2012 lines (1824 loc) · 58 KB
/
elf2flt.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
/*
* elf2flt.c: Convert ELF (or any BFD format) to FLAT binary format
*
* (c) 1999-2002, Greg Ungerer <[email protected]>
* Created elf2flt from coff2flt (see copyrights below). Added all the
* ELF format file handling. Extended relocation support for all of
* text and data.
*
* (c) 2008-2009, Xtensa support, Oskar Schirmer <[email protected]>
* (c) 2006 Support the -a (use_resolved) option for TARGET_arm.
* Shaun Jackman <[email protected]>
* (c) 2004, Nios II support, Wentao Xu <[email protected]>
* (c) 2003, H8 support, ktrace <[email protected]>
* (c) 2003-2004, MicroBlaze support, John Williams <[email protected]>
* (c) 2001-2003, arm/arm-pic/arm-big-endian support <[email protected]>
* (c) 2001, v850 changes, Mile Bader <[email protected]>
* (c) 2003, SuperH support, Paul Mundt <[email protected]>
* (c) 2001, zflat support <[email protected]>
* (c) 2001, Changes for GOT entries Paul Dale <[email protected]> and
* David McCullough <[email protected]>
*
* Now supports PIC with GOT tables. This works by taking a '.elf' file
* and a fully linked elf executable (at address 0) and produces a flat
* file that can be loaded with some fixups. It still supports the old
* style fully relocatable elf format files.
*
* Originally obj-res.c
*
* (c) 1998, Kenneth Albanowski <[email protected]>
* (c) 1998, D. Jeff Dionne
* (c) 1998, The Silver Hammer Group Ltd.
* (c) 1996, 1997 Dionne & Associates <[email protected]>
*
* This is Free Software, under the GNU Public Licence v2 or greater.
*
* Relocation added March 1997, Kresten Krab Thorup
*/
#include <inttypes.h> /* All the standard PRI define times for printf */
#include <stdio.h> /* Userland pieces of the ANSI C standard I/O package */
#include <stdlib.h> /* Userland prototypes of the ANSI C std lib functions */
#include <stdarg.h> /* Allows va_list to exist in the these namespaces */
#include <string.h> /* Userland prototypes of the string handling funcs */
#include <strings.h>
#include <unistd.h> /* Userland prototypes of the Unix std system calls */
#include <fcntl.h> /* Flag value for file handling functions */
#include <time.h>
/* from $(INSTALLDIR)/include */
#include <bfd.h> /* Main header file for the BFD library */
#include <libiberty.h>
#include "stubs.h"
const char *elf2flt_progname;
/* Include the right header file for the R_xxx defines. */
#if defined(TARGET_arm)
#include <elf/arm.h>
#elif defined(TARGET_bfin)
#include <elf/bfin.h>
#elif defined(TARGET_h8300)
#include <elf/h8.h>
#elif defined(TARGET_m68k)
#include <elf/m68k.h>
#elif defined(TARGET_microblaze)
#include <elf/microblaze.h>
#elif defined(TARGET_nios) || defined(TARGET_nios2)
/* Altera NIOS specific definitions. */
#define FLAT_NIOS2_R_32 0 /* Normal 32-bit reloc */
#define FLAT_NIOS2_R_HI_LO 1
#define FLAT_NIOS2_R_HIADJ_LO 2
#define FLAT_NIOS2_R_CALL26 4
#include <elf/nios2.h>
#elif defined(TARGET_sh)
#include <elf/sh.h>
#elif defined(TARGET_sparc)
#include <elf/sparc.h>
#elif defined(TARGET_v850)
#include <elf/v850.h>
#elif defined(TARGET_xtensa)
#include <elf/xtensa.h>
#endif
#if defined(__MINGW32__)
#include <getopt.h>
#endif
/* from uClinux-x.x.x/include/linux */
#include "flat.h" /* Binary flat header description */
#include "compress.h"
#ifdef TARGET_e1
#include <e1.h>
#endif
#ifdef TARGET_v850e
#define TARGET_v850
#endif
#if defined(TARGET_m68k)
#define ARCH "m68k/coldfire"
#elif defined(TARGET_arm)
#define ARCH "arm"
#elif defined(TARGET_sparc)
#define ARCH "sparc"
#elif defined(TARGET_v850)
#define ARCH "v850"
#elif defined(TARGET_sh)
#define ARCH "sh"
#elif defined(TARGET_h8300)
#define ARCH "h8300"
#elif defined(TARGET_microblaze)
#define ARCH "microblaze"
#elif defined(TARGET_e1)
#define ARCH "e1-coff"
#elif defined(TARGET_bfin)
#define ARCH "bfin"
#elif defined(TARGET_nios)
#define ARCH "nios"
#elif defined(TARGET_nios2)
#define ARCH "nios2"
#elif defined(TARGET_xtensa)
#define ARCH "xtensa"
#else
#error "Don't know how to support your CPU architecture??"
#endif
#if defined(TARGET_m68k) || defined(TARGET_h8300) || defined(TARGET_bfin)
/*
* Define a maximum number of bytes allowed in the offset table.
* We'll fail if the table is larger than this.
*
* This limit may be different for platforms other than m68k, but
* 8000 entries is a lot, trust me :-) (davidm)
*/
#define GOT_LIMIT 32767
/*
* we have to mask out the shared library id here and there, this gives
* us the real address bits when needed
*/
#define real_address_bits(x) (pic_with_got ? ((x) & 0xffffff) : (x))
#else
#define real_address_bits(x) (x)
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
/* Extra output when running. */
static int verbose = 0;
/* Do ELF/GOT processing with PIC code. */
static int pic_with_got = 0;
/* Instruct loader to allocate everything into RAM. */
static int load_to_ram = 0;
/* Instruct kernel loader to output debug/trace info when loading. */
static int ktrace = 0;
/* 1 = compress everything, 2 = compress data only. */
static int docompress = 0;
/* If true, get the value of symbol references from the program contents,
not from the relocation table. In this case, the input ELF file must
be already fully resolved (using the `-q' flag with recent versions of
GNU ld will give you a fully resolved output file with relocation
entries). */
static int use_resolved = 0;
/* Set if the text section contains any relocations. If it does, we must
set the load_to_ram flag. */
static int text_has_relocs = 0;
static asymbol **
get_symbols (bfd *abfd, long *num)
{
int32_t storage_needed;
asymbol **symbol_table;
long number_of_symbols;
storage_needed = bfd_get_symtab_upper_bound (abfd);
if (storage_needed < 0)
abort ();
if (storage_needed == 0)
return NULL;
symbol_table = xmalloc (storage_needed);
number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
if (number_of_symbols < 0)
abort ();
*num = number_of_symbols;
return symbol_table;
}
static int
dump_symbols(asymbol **symbol_table, long number_of_symbols)
{
long i;
printf("SYMBOL TABLE:\n");
for (i=0; i<number_of_symbols; i++) {
printf(" NAME=%s VALUE=0x%"BFD_VMA_FMT"x\n",
symbol_table[i]->name, symbol_table[i]->value);
}
printf("\n");
return(0);
}
#if !defined TARGET_e1 && !defined TARGET_bfin
static long
get_symbol_offset(char *name, asection *sec, asymbol **symbol_table, long number_of_symbols)
{
long i;
for (i=0; i<number_of_symbols; i++) {
if (symbol_table[i]->section == sec) {
if (!strcmp(symbol_table[i]->name, name)) {
return symbol_table[i]->value;
}
}
}
return -1;
}
#endif
#ifdef TARGET_nios2
static long
get_gp_value(asymbol **symbol_table, long number_of_symbols)
{
long i;
for (i=0; i<number_of_symbols; i++) {
if (!strcmp(symbol_table[i]->name, "_gp"))
return symbol_table[i]->value;
}
return -1;
}
#endif
static int32_t
add_com_to_bss(asymbol **symbol_table, int32_t number_of_symbols, int32_t bss_len)
{
int32_t i, comsize;
int32_t offset;
comsize = 0;
for (i=0; i<number_of_symbols; i++) {
if (strcmp("*COM*", symbol_table[i]->section->name) == 0) {
offset = bss_len + comsize;
comsize += symbol_table[i]->value;
symbol_table[i]->value = offset;
}
}
return comsize;
}
#ifdef TARGET_bfin
/* FUNCTION : weak_und_symbol
ABSTRACT : return true if symbol is weak and undefined.
*/
static int
weak_und_symbol(const char *reloc_section_name,
struct bfd_symbol *symbol)
{
if (!(strstr (reloc_section_name, "text")
|| strstr (reloc_section_name, "data")
|| strstr (reloc_section_name, "bss"))) {
if (symbol->flags & BSF_WEAK) {
#ifdef DEBUG_BFIN
fprintf(stderr, "found weak undefined symbol %s\n", symbol->name);
#endif
return TRUE;
}
}
return FALSE;
}
static int
bfin_set_reloc (uint32_t *reloc,
const char *reloc_section_name,
const char *sym_name,
struct bfd_symbol *symbol,
int sp, int32_t offset)
{
unsigned int type = 0;
uint32_t val;
if (strstr (reloc_section_name, "stack")) {
if (verbose)
printf("Stack-relative reloc, offset %08"PRIx32"\n", offset);
/* This must be a stack_start reloc for stack checking. */
type = 1;
}
val = (offset & ((1 << 26) - 1));
val |= (sp & ((1 << 3) - 1)) << 26;
val |= type << 29;
*reloc = val;
return 0;
}
static bfd *compare_relocs_bfd;
static int
compare_relocs (const void *pa, const void *pb)
{
const arelent *const *a = pa, *const *b = pb;
const arelent *ra = *a, *rb = *b;
unsigned long va, vb;
uint32_t a_vma, b_vma;
if (!ra->sym_ptr_ptr || !*ra->sym_ptr_ptr)
return -1;
else if (!rb->sym_ptr_ptr || !*rb->sym_ptr_ptr)
return 1;
a_vma = bfd_section_vma(compare_relocs_bfd,
(*(ra->sym_ptr_ptr))->section);
b_vma = bfd_section_vma(compare_relocs_bfd,
(*(rb->sym_ptr_ptr))->section);
va = (*(ra->sym_ptr_ptr))->value + a_vma + ra->addend;
vb = (*(rb->sym_ptr_ptr))->value + b_vma + rb->addend;
return va - vb;
}
#endif
static uint32_t *
output_relocs (
bfd *abs_bfd,
asymbol **symbols,
int number_of_symbols,
uint32_t *n_relocs,
unsigned char *text, int text_len, uint32_t text_vma,
unsigned char *data, int data_len, uint32_t data_vma,
bfd *rel_bfd)
{
uint32_t *flat_relocs;
asection *a, *sym_section, *r;
arelent **relpp, **p, *q;
const char *sym_name, *section_name;
unsigned char *sectionp;
unsigned long pflags;
char addstr[20];
uint32_t sym_addr, sym_vma, section_vma;
int relsize, relcount;
int flat_reloc_count;
int sym_reloc_size, rc;
int got_size = 0;
int bad_relocs = 0;
asymbol **symb;
long nsymb;
#ifdef TARGET_bfin
unsigned long persistent_data = 0;
#endif
#if 0
printf("%s(%d): output_relocs(abs_bfd=%d,synbols=0x%x,number_of_symbols=%d"
"n_relocs=0x%x,text=0x%x,text_len=%d,data=0x%x,data_len=%d)\n",
__FILE__, __LINE__, abs_bfd, symbols, number_of_symbols, n_relocs,
text, text_len, data, data_len);
#endif
if (0)
dump_symbols(symbols, number_of_symbols);
*n_relocs = 0;
flat_relocs = NULL;
flat_reloc_count = 0;
sym_reloc_size = 0;
rc = 0;
pflags = 0;
/* Silence gcc warnings */
(void) pflags;
(void) sym_vma;
/* Determine how big our offset table is in bytes.
* This isn't too difficult as we've terminated the table with -1.
* Also note that both the relocatable and absolute versions have this
* terminator even though the relocatable one doesn't have the GOT!
*/
if (pic_with_got && !use_resolved) {
uint32_t *lp = (uint32_t *)data;
/* Should call ntohl(*lp) here but is isn't going to matter */
while (*lp != 0xffffffff) lp++;
got_size = ((unsigned char *)lp) - data;
if (verbose)
printf("GOT table contains %zu entries (%d bytes)\n",
got_size/sizeof(uint32_t), got_size);
#ifdef TARGET_m68k
if (got_size > GOT_LIMIT)
fatal("GOT too large: %d bytes (limit = %d bytes)",
got_size, GOT_LIMIT);
#endif
}
for (a = abs_bfd->sections; (a != (asection *) NULL); a = a->next) {
section_vma = bfd_section_vma(abs_bfd, a);
if (verbose)
printf("SECTION: %s [%p]: flags=0x%x vma=0x%"PRIx32"\n",
a->name, a, a->flags, section_vma);
// if (bfd_is_abs_section(a))
// continue;
if (bfd_is_und_section(a))
continue;
if (bfd_is_com_section(a))
continue;
// if ((a->flags & SEC_RELOC) == 0)
// continue;
/*
* Only relocate things in the data sections if we are PIC/GOT.
* otherwise do text as well
*/
if ((!pic_with_got || ALWAYS_RELOC_TEXT) && (a->flags & SEC_CODE))
sectionp = text + (a->vma - text_vma);
else if (a->flags & SEC_DATA)
sectionp = data + (a->vma - data_vma);
else
continue;
/* Now search for the equivalent section in the relocation binary
* and use that relocation information to build reloc entries
* for this one.
*/
for (r=rel_bfd->sections; r != NULL; r=r->next)
if (strcmp(a->name, r->name) == 0)
break;
if (r == NULL)
continue;
if (verbose)
printf(" RELOCS: %s [%p]: flags=0x%x vma=0x%"BFD_VMA_FMT"x\n",
r->name, r, r->flags, bfd_section_vma(abs_bfd, r));
if ((r->flags & SEC_RELOC) == 0)
continue;
relsize = bfd_get_reloc_upper_bound(rel_bfd, r);
if (relsize <= 0) {
if (verbose)
printf("%s(%d): no relocation entries section=%s\n",
__FILE__, __LINE__, r->name);
continue;
}
symb = get_symbols(rel_bfd, &nsymb);
relpp = xmalloc(relsize);
relcount = bfd_canonicalize_reloc(rel_bfd, r, relpp, symb);
if (relcount <= 0) {
if (verbose)
printf("%s(%d): no relocation entries section=%s\n",
__FILE__, __LINE__, r->name);
continue;
} else {
#ifdef TARGET_bfin
compare_relocs_bfd = abs_bfd;
qsort (relpp, relcount, sizeof *relpp, compare_relocs);
#endif
for (p = relpp; (relcount && (*p != NULL)); p++, relcount--) {
unsigned char *r_mem = NULL;
int relocation_needed = 0;
#ifdef TARGET_microblaze
/* The MICROBLAZE_XX_NONE relocs can be skipped.
They represent PC relative branches that the
linker has already resolved */
switch ((*p)->howto->type)
{
case R_MICROBLAZE_NONE:
case R_MICROBLAZE_64_NONE:
case R_MICROBLAZE_32_PCREL_LO:
continue;
}
#endif /* TARGET_microblaze */
#ifdef TARGET_v850
/* Skip this relocation entirely if possible (we
do this early, before doing any other
processing on it). */
switch ((*p)->howto->type) {
case R_V850_9_PCREL:
case R_V850_22_PCREL:
case R_V850_SDA_16_16_OFFSET:
case R_V850_SDA_15_16_OFFSET:
case R_V850_ZDA_15_16_OFFSET:
case R_V850_TDA_6_8_OFFSET:
case R_V850_TDA_7_8_OFFSET:
case R_V850_TDA_7_7_OFFSET:
case R_V850_TDA_16_16_OFFSET:
case R_V850_TDA_4_5_OFFSET:
case R_V850_TDA_4_4_OFFSET:
case R_V850_SDA_16_16_SPLIT_OFFSET:
case R_V850_CALLT_6_7_OFFSET:
case R_V850_CALLT_16_16_OFFSET:
/* These are relative relocations, which
have already been fixed up by the
linker at this point, so just ignore
them. */
continue;
}
#endif /* USE_V850_RELOCS */
q = *p;
if (q->sym_ptr_ptr && *q->sym_ptr_ptr) {
sym_name = (*(q->sym_ptr_ptr))->name;
sym_section = (*(q->sym_ptr_ptr))->section;
section_name=(*(q->sym_ptr_ptr))->section->name;
} else {
printf("ERROR: undefined relocation entry\n");
rc = -1;
continue;
}
#ifndef TARGET_bfin
/* Adjust the address to account for the GOT table which wasn't
* present in the relative file link.
*/
if (pic_with_got && !use_resolved)
q->address += got_size;
#endif
/* A pointer to what's being relocated, used often
below. */
r_mem = sectionp + q->address;
/*
* Fixup offset in the actual section.
*/
addstr[0] = 0;
#if !defined TARGET_e1 && !defined TARGET_bfin
if ((sym_addr = get_symbol_offset((char *) sym_name,
sym_section, symbols, number_of_symbols)) == -1) {
sym_addr = 0;
}
#else
sym_addr = (*(q->sym_ptr_ptr))->value;
#endif
if (use_resolved) {
/* Use the address of the symbol already in
the program text. How this is handled may
still depend on the particular relocation
though. */
switch (q->howto->type) {
#ifdef TARGET_v850
int r2_type;
case R_V850_HI16_S:
/* We specially handle adjacent
HI16_S/ZDA_15_16_OFFSET and
HI16_S/LO16 pairs that reference the
same address (these are usually
movhi/ld and movhi/movea pairs,
respectively). */
if (relcount == 0)
r2_type = R_V850_NONE;
else
r2_type = p[1]->howto->type;
if ((r2_type == R_V850_ZDA_15_16_OFFSET
|| r2_type == R_V850_LO16)
&& (p[0]->sym_ptr_ptr
== p[1]->sym_ptr_ptr)
&& (p[0]->addend == p[1]->addend))
{
relocation_needed = 1;
switch (r2_type) {
case R_V850_ZDA_15_16_OFFSET:
pflags = 0x10000000;
break;
case R_V850_LO16:
pflags = 0x20000000;
break;
}
/* We don't really need the
actual value -- the bits
produced by the linker are
what we want in the final
flat file -- but get it
anyway if useful for
debugging. */
if (verbose) {
unsigned char *r2_mem =
sectionp
+ p[1]->address;
/* little-endian */
int hi = r_mem[0]
+ (r_mem[1] << 8);
int lo = r2_mem[0]
+ (r2_mem[1] << 8);
/* Sign extend LO. */
lo = (lo ^ 0x8000)
- 0x8000;
/* Maybe ignore the LSB
of LO, which is
actually part of the
instruction. */
if (r2_type != R_V850_LO16)
lo &= ~1;
sym_addr =
(hi << 16)
+ lo;
}
} else
goto bad_resolved_reloc;
break;
case R_V850_LO16:
/* See if this is actually the
2nd half of a pair. */
if (p > relpp
&& (p[-1]->howto->type
== R_V850_HI16_S)
&& (p[-1]->sym_ptr_ptr
== p[0]->sym_ptr_ptr)
&& (p[-1]->addend == p[0]->addend))
break; /* not an error */
else
goto bad_resolved_reloc;
case R_V850_HI16:
goto bad_resolved_reloc;
default:
goto good_32bit_resolved_reloc;
#elif defined(TARGET_arm)
case R_ARM_TARGET1:
case R_ARM_TARGET2:
case R_ARM_ABS32:
relocation_needed = 1;
break;
case R_ARM_REL32:
case R_ARM_JUMP24:
case R_ARM_CALL:
case R_ARM_THM_PC11:
case R_ARM_THM_PC22:
case R_ARM_THM_JUMP24:
case R_ARM_PC24:
case R_ARM_PLT32:
case R_ARM_GOTPC:
case R_ARM_GOT32:
case R_ARM_PREL31:
case R_ARM_V4BX:
case R_ARM_NONE:
relocation_needed = 0;
break;
default:
goto bad_resolved_reloc;
#elif defined(TARGET_m68k)
case R_68K_32:
goto good_32bit_resolved_reloc;
case R_68K_PC32:
case R_68K_PC16:
/* The linker has already resolved
PC relocs for us. In PIC links,
the symbol must be in the data
segment. */
case R_68K_NONE:
continue;
default:
goto bad_resolved_reloc;
#elif defined TARGET_bfin
case R_BFIN_RIMM16:
case R_BFIN_LUIMM16:
case R_BFIN_HUIMM16:
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
if (weak_und_symbol(sym_section->name, (*(q->sym_ptr_ptr))))
continue;
if (q->howto->type == R_BFIN_RIMM16 && (0xFFFF0000 & sym_addr)) {
fprintf (stderr, "Relocation overflow for rN = %s\n",sym_name);
bad_relocs++;
}
if ((0xFFFF0000 & sym_addr) != persistent_data) {
flat_relocs = (uint32_t *)
(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
if (verbose)
printf("New persistent data for %08"PRIx32"\n", sym_addr);
persistent_data = 0xFFFF0000 & sym_addr;
flat_relocs[flat_reloc_count++]
= (sym_addr >> 16) | (3 << 26);
}
flat_relocs = (uint32_t *)
(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
if (bfin_set_reloc (flat_relocs + flat_reloc_count,
sym_section->name, sym_name,
(*(q->sym_ptr_ptr)),
q->howto->type == R_BFIN_HUIMM16 ? 1 : 0,
section_vma + q->address))
bad_relocs++;
if (a->flags & SEC_CODE)
text_has_relocs = 1;
flat_reloc_count++;
break;
case R_BFIN_BYTE4_DATA:
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
if (weak_und_symbol (sym_section->name, (*(q->sym_ptr_ptr))))
continue;
flat_relocs = (uint32_t *)
(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
if (bfin_set_reloc (flat_relocs + flat_reloc_count,
sym_section->name, sym_name,
(*(q->sym_ptr_ptr)),
2, section_vma + q->address))
bad_relocs++;
if (a->flags & SEC_CODE)
text_has_relocs = 1;
flat_reloc_count++;
break;
#elif defined (TARGET_h8300)
case R_H8_DIR32:
case R_H8_DIR32A16:
case R_H8_DISP32A16:
r_mem[0] = 0;
case R_H8_DIR24A8:
case R_H8_DIR24R8:
goto good_32bit_resolved_reloc;
case R_H8_PCREL8:
case R_H8_PCREL16:
continue;
#elif defined(TARGET_xtensa)
case R_XTENSA_NONE:
case R_XTENSA_OP0:
case R_XTENSA_OP1:
case R_XTENSA_OP2:
case R_XTENSA_SLOT0_OP:
case R_XTENSA_SLOT1_OP:
case R_XTENSA_SLOT2_OP:
case R_XTENSA_SLOT3_OP:
case R_XTENSA_SLOT4_OP:
case R_XTENSA_SLOT5_OP:
case R_XTENSA_SLOT6_OP:
case R_XTENSA_SLOT7_OP:
case R_XTENSA_SLOT8_OP:
case R_XTENSA_SLOT9_OP:
case R_XTENSA_SLOT10_OP:
case R_XTENSA_SLOT11_OP:
case R_XTENSA_SLOT12_OP:
case R_XTENSA_SLOT13_OP:
case R_XTENSA_SLOT14_OP:
case R_XTENSA_SLOT0_ALT:
case R_XTENSA_SLOT1_ALT:
case R_XTENSA_SLOT2_ALT:
case R_XTENSA_SLOT3_ALT:
case R_XTENSA_SLOT4_ALT:
case R_XTENSA_SLOT5_ALT:
case R_XTENSA_SLOT6_ALT:
case R_XTENSA_SLOT7_ALT:
case R_XTENSA_SLOT8_ALT:
case R_XTENSA_SLOT9_ALT:
case R_XTENSA_SLOT10_ALT:
case R_XTENSA_SLOT11_ALT:
case R_XTENSA_SLOT12_ALT:
case R_XTENSA_SLOT13_ALT:
case R_XTENSA_SLOT14_ALT:
case R_XTENSA_ASM_EXPAND:
case R_XTENSA_ASM_SIMPLIFY:
case R_XTENSA_DIFF8:
case R_XTENSA_DIFF16:
case R_XTENSA_DIFF32:
case R_XTENSA_32_PCREL:
continue;
case R_XTENSA_32:
case R_XTENSA_PLT:
goto good_32bit_resolved_reloc;
default:
goto bad_resolved_reloc;
#else
default:
/* The default is to assume that the
relocation is relative and has
already been fixed up by the
linker (perhaps we ought to make
give an error by default, and
require `safe' relocations to be
enumberated explicitly?). */
goto good_32bit_resolved_reloc;
#endif
good_32bit_resolved_reloc:
if (bfd_big_endian (abs_bfd))
sym_addr =
(r_mem[0] << 24)
+ (r_mem[1] << 16)
+ (r_mem[2] << 8)
+ r_mem[3];
else
sym_addr =
r_mem[0]
+ (r_mem[1] << 8)
+ (r_mem[2] << 16)
+ (r_mem[3] << 24);
relocation_needed = 1;
break;
bad_resolved_reloc:
printf("ERROR: reloc type %s unsupported in this context\n",
q->howto->name);
bad_relocs++;
break;
}
} else {
/* Calculate the sym address ourselves. */
#if defined(TARGET_xtensa)
/* For xtensa, calculation of addresses won't
work this way. binutils "ld -r" generate
different relocation types, among others
type 20, R_XTENSA_SLOT0_OP. The latter is
produced for various opcodes that differ
in size and format, some will have the
addend filled in when linking, others won't.
For elf2flt to handle these relocations
would involve analysing the opcodes in
detail. Therefore, elf2flt for xtensa is
patched to work with "-a" option solely,
which will take output of "ld -q".
*/
fatal("ERROR: cannot run without '-a'");
#endif
sym_reloc_size = bfd_get_reloc_size(q->howto);
#if !defined(TARGET_h8300) && !defined(TARGET_e1) && !defined(TARGET_bfin) && !defined(TARGET_m68k)
if (sym_reloc_size != 4) {
printf("ERROR: bad reloc type %d size=%d for symbol=%s\n",
(*p)->howto->type, sym_reloc_size, sym_name);
bad_relocs++;
rc = -1;
continue;
}
#endif
switch ((*p)->howto->type) {
#if defined(TARGET_m68k)
case R_68K_32:
relocation_needed = 1;
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_68K_PC16:
case R_68K_PC32:
sym_vma = 0;
sym_addr += sym_vma + q->addend;
sym_addr -= q->address;
break;
#endif
#if defined(TARGET_arm)
case R_ARM_ABS32:
relocation_needed = 1;
if (verbose)
fprintf(stderr,
"%s vma=0x%x, "
"value=0x%"BFD_VMA_FMT"x, "
"address=0x%"BFD_VMA_FMT"x "
"sym_addr=0x%x rs=0x%x, opcode=0x%x\n",
"ABS32",
sym_vma, (*(q->sym_ptr_ptr))->value,
q->address, sym_addr,
(*p)->howto->rightshift,
*(uint32_t *)r_mem);
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_ARM_GOT32:
case R_ARM_GOTPC:
/* Should be fine as is */
break;
case R_ARM_PLT32:
if (verbose)
fprintf(stderr,
"%s vma=0x%x, "
"value=0x%"BFD_VMA_FMT"x, "
"address=0x%"BFD_VMA_FMT"x "
"sym_addr=0x%x rs=0x%x, opcode=0x%x\n",
"PLT32",
sym_vma, (*(q->sym_ptr_ptr))->value,
q->address, sym_addr,
(*p)->howto->rightshift,
*(uint32_t *)r_mem);
case R_ARM_PC24:
sym_vma = 0;
sym_addr = (sym_addr-q->address)>>(*p)->howto->rightshift;
break;
#endif
#ifdef TARGET_v850
case R_V850_ABS32:
relocation_needed = 1;
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_V850_ZDA_16_16_OFFSET:
case R_V850_ZDA_16_16_SPLIT_OFFSET:
/* Can't support zero-relocations. */
printf ("ERROR: %s+0x%"BFD_VMA_FMT"x: zero relocations not supported\n",
sym_name, q->addend);
continue;
#endif /* TARGET_v850 */
#ifdef TARGET_h8300
case R_H8_DIR24R8:
if (sym_reloc_size != 4) {
printf("R_H8_DIR24R8 size %d\n", sym_reloc_size);
bad_relocs++;
continue;
}
relocation_needed = 1;
sym_addr = (*(q->sym_ptr_ptr))->value;
q->address -= 1;
r_mem -= 1; /* tracks q->address */
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
sym_addr |= (*(unsigned char *)r_mem<<24);
break;
case R_H8_DIR24A8:
if (sym_reloc_size != 4) {
printf("R_H8_DIR24A8 size %d\n", sym_reloc_size);
bad_relocs++;
continue;
}
/* Absolute symbol done not relocation */
relocation_needed = !bfd_is_abs_section(sym_section);
sym_addr = (*(q->sym_ptr_ptr))->value;
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_H8_DIR32:
case R_H8_DIR32A16: /* currently 32, could be made 16 */
case R_H8_DISP32A16:
if (sym_reloc_size != 4) {
printf("R_H8_DIR32 size %d\n", sym_reloc_size);
bad_relocs++;
continue;
}
relocation_needed = 1;
sym_addr = (*(q->sym_ptr_ptr))->value;
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_H8_PCREL16:
relocation_needed = 0;
sym_vma = 0;
sym_addr = (*(q->sym_ptr_ptr))->value;
sym_addr += sym_vma + q->addend;
sym_addr -= (q->address + 2);
if (bfd_big_endian(abs_bfd))
*(unsigned short *)r_mem =
bfd_big_endian(abs_bfd) ? htons(sym_addr) : sym_addr;
continue;
case R_H8_PCREL8:
relocation_needed = 0;
sym_vma = 0;
sym_addr = (*(q->sym_ptr_ptr))->value;
sym_addr += sym_vma + q->addend;
sym_addr -= (q->address + 1);
*(unsigned char *)r_mem = sym_addr;
continue;
#endif
#ifdef TARGET_microblaze
case R_MICROBLAZE_64:
/* The symbol is split over two consecutive instructions.
Flag this to the flat loader by setting the high bit of
the relocation symbol. */
{
unsigned char *p = r_mem;
pflags=0x80000000;
/* work out the relocation */
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
/* Write relocated pointer back */
p[2] = (sym_addr >> 24) & 0xff;
p[3] = (sym_addr >> 16) & 0xff;
p[6] = (sym_addr >> 8) & 0xff;
p[7] = sym_addr & 0xff;
/* create a new reloc entry */
flat_relocs = realloc(flat_relocs,
(flat_reloc_count + 1) * sizeof(uint32_t));
flat_relocs[flat_reloc_count] = pflags | (section_vma + q->address);
flat_reloc_count++;
relocation_needed = 0;
pflags = 0;
sprintf(&addstr[0], "+0x%ld", sym_addr - (*(q->sym_ptr_ptr))->value -