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[deliverable/binutils-gdb.git] / bfd / elf32-bfin.c
1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2018 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/bfin.h"
26 #include "dwarf2.h"
27 #include "hashtab.h"
28
29 /* FUNCTION : bfin_pltpc_reloc
30 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
31 static bfd_reloc_status_type
32 bfin_pltpc_reloc (
33 bfd *abfd ATTRIBUTE_UNUSED,
34 arelent *reloc_entry ATTRIBUTE_UNUSED,
35 asymbol *symbol ATTRIBUTE_UNUSED,
36 void * data ATTRIBUTE_UNUSED,
37 asection *input_section ATTRIBUTE_UNUSED,
38 bfd *output_bfd ATTRIBUTE_UNUSED,
39 char **error_message ATTRIBUTE_UNUSED)
40 {
41 bfd_reloc_status_type flag = bfd_reloc_ok;
42 return flag;
43 }
44 \f
45
46 static bfd_reloc_status_type
47 bfin_pcrel24_reloc (bfd *abfd,
48 arelent *reloc_entry,
49 asymbol *symbol,
50 void * data,
51 asection *input_section,
52 bfd *output_bfd,
53 char **error_message ATTRIBUTE_UNUSED)
54 {
55 bfd_vma relocation;
56 bfd_size_type addr = reloc_entry->address;
57 bfd_vma output_base = 0;
58 reloc_howto_type *howto = reloc_entry->howto;
59 asection *output_section;
60 bfd_boolean relocatable = (output_bfd != NULL);
61
62 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
63 return bfd_reloc_outofrange;
64
65 if (bfd_is_und_section (symbol->section)
66 && (symbol->flags & BSF_WEAK) == 0
67 && !relocatable)
68 return bfd_reloc_undefined;
69
70 if (bfd_is_com_section (symbol->section))
71 relocation = 0;
72 else
73 relocation = symbol->value;
74
75 output_section = symbol->section->output_section;
76
77 if (relocatable)
78 output_base = 0;
79 else
80 output_base = output_section->vma;
81
82 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
83 relocation += output_base + symbol->section->output_offset;
84
85 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
86 relocation += reloc_entry->addend;
87
88 relocation -= input_section->output_section->vma + input_section->output_offset;
89 relocation -= reloc_entry->address;
90
91 if (howto->complain_on_overflow != complain_overflow_dont)
92 {
93 bfd_reloc_status_type status;
94 status = bfd_check_overflow (howto->complain_on_overflow,
95 howto->bitsize,
96 howto->rightshift,
97 bfd_arch_bits_per_address(abfd),
98 relocation);
99 if (status != bfd_reloc_ok)
100 return status;
101 }
102
103 /* if rightshift is 1 and the number odd, return error. */
104 if (howto->rightshift && (relocation & 0x01))
105 {
106 _bfd_error_handler (_("relocation should be even number"));
107 return bfd_reloc_overflow;
108 }
109
110 relocation >>= (bfd_vma) howto->rightshift;
111 /* Shift everything up to where it's going to be used. */
112
113 relocation <<= (bfd_vma) howto->bitpos;
114
115 if (relocatable)
116 {
117 reloc_entry->address += input_section->output_offset;
118 reloc_entry->addend += symbol->section->output_offset;
119 }
120
121 {
122 short x;
123
124 /* We are getting reloc_entry->address 2 byte off from
125 the start of instruction. Assuming absolute postion
126 of the reloc data. But, following code had been written assuming
127 reloc address is starting at begining of instruction.
128 To compensate that I have increased the value of
129 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
130
131 relocation += 1;
132 x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
133 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
134 bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
135
136 x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
137 x = relocation & 0xFFFF;
138 bfd_put_16 (abfd, x, (unsigned char *) data + addr );
139 }
140 return bfd_reloc_ok;
141 }
142
143 static bfd_reloc_status_type
144 bfin_imm16_reloc (bfd *abfd,
145 arelent *reloc_entry,
146 asymbol *symbol,
147 void * data,
148 asection *input_section,
149 bfd *output_bfd,
150 char **error_message ATTRIBUTE_UNUSED)
151 {
152 bfd_vma relocation, x;
153 bfd_size_type reloc_addr = reloc_entry->address;
154 bfd_vma output_base = 0;
155 reloc_howto_type *howto = reloc_entry->howto;
156 asection *output_section;
157 bfd_boolean relocatable = (output_bfd != NULL);
158
159 /* Is the address of the relocation really within the section? */
160 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
161 return bfd_reloc_outofrange;
162
163 if (bfd_is_und_section (symbol->section)
164 && (symbol->flags & BSF_WEAK) == 0
165 && !relocatable)
166 return bfd_reloc_undefined;
167
168 output_section = symbol->section->output_section;
169 relocation = symbol->value;
170
171 /* Convert input-section-relative symbol value to absolute. */
172 if (relocatable)
173 output_base = 0;
174 else
175 output_base = output_section->vma;
176
177 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
178 relocation += output_base + symbol->section->output_offset;
179
180 /* Add in supplied addend. */
181 relocation += reloc_entry->addend;
182
183 if (relocatable)
184 {
185 reloc_entry->address += input_section->output_offset;
186 reloc_entry->addend += symbol->section->output_offset;
187 }
188 else
189 {
190 reloc_entry->addend = 0;
191 }
192
193 if (howto->complain_on_overflow != complain_overflow_dont)
194 {
195 bfd_reloc_status_type flag;
196 flag = bfd_check_overflow (howto->complain_on_overflow,
197 howto->bitsize,
198 howto->rightshift,
199 bfd_arch_bits_per_address(abfd),
200 relocation);
201 if (flag != bfd_reloc_ok)
202 return flag;
203 }
204
205 /* Here the variable relocation holds the final address of the
206 symbol we are relocating against, plus any addend. */
207
208 relocation >>= (bfd_vma) howto->rightshift;
209 x = relocation;
210 bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
211 return bfd_reloc_ok;
212 }
213
214
215 static bfd_reloc_status_type
216 bfin_byte4_reloc (bfd *abfd,
217 arelent *reloc_entry,
218 asymbol *symbol,
219 void * data,
220 asection *input_section,
221 bfd *output_bfd,
222 char **error_message ATTRIBUTE_UNUSED)
223 {
224 bfd_vma relocation, x;
225 bfd_size_type addr = reloc_entry->address;
226 bfd_vma output_base = 0;
227 asection *output_section;
228 bfd_boolean relocatable = (output_bfd != NULL);
229
230 /* Is the address of the relocation really within the section? */
231 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
232 return bfd_reloc_outofrange;
233
234 if (bfd_is_und_section (symbol->section)
235 && (symbol->flags & BSF_WEAK) == 0
236 && !relocatable)
237 return bfd_reloc_undefined;
238
239 output_section = symbol->section->output_section;
240 relocation = symbol->value;
241 /* Convert input-section-relative symbol value to absolute. */
242 if (relocatable)
243 output_base = 0;
244 else
245 output_base = output_section->vma;
246
247 if ((symbol->name
248 && symbol->section->name
249 && !strcmp (symbol->name, symbol->section->name))
250 || !relocatable)
251 {
252 relocation += output_base + symbol->section->output_offset;
253 }
254
255 relocation += reloc_entry->addend;
256
257 if (relocatable)
258 {
259 /* This output will be relocatable ... like ld -r. */
260 reloc_entry->address += input_section->output_offset;
261 reloc_entry->addend += symbol->section->output_offset;
262 }
263 else
264 {
265 reloc_entry->addend = 0;
266 }
267
268 /* Here the variable relocation holds the final address of the
269 symbol we are relocating against, plus any addend. */
270 x = relocation & 0xFFFF0000;
271 x >>=16;
272 bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
273
274 x = relocation & 0x0000FFFF;
275 bfd_put_16 (abfd, x, (unsigned char *) data + addr);
276 return bfd_reloc_ok;
277 }
278
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280 Use this instead of bfd_perform_relocation. */
281 static bfd_reloc_status_type
282 bfin_bfd_reloc (bfd *abfd,
283 arelent *reloc_entry,
284 asymbol *symbol,
285 void * data,
286 asection *input_section,
287 bfd *output_bfd,
288 char **error_message ATTRIBUTE_UNUSED)
289 {
290 bfd_vma relocation;
291 bfd_size_type addr = reloc_entry->address;
292 bfd_vma output_base = 0;
293 reloc_howto_type *howto = reloc_entry->howto;
294 asection *output_section;
295 bfd_boolean relocatable = (output_bfd != NULL);
296
297 /* Is the address of the relocation really within the section? */
298 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
299 return bfd_reloc_outofrange;
300
301 if (bfd_is_und_section (symbol->section)
302 && (symbol->flags & BSF_WEAK) == 0
303 && !relocatable)
304 return bfd_reloc_undefined;
305
306 /* Get symbol value. (Common symbols are special.) */
307 if (bfd_is_com_section (symbol->section))
308 relocation = 0;
309 else
310 relocation = symbol->value;
311
312 output_section = symbol->section->output_section;
313
314 /* Convert input-section-relative symbol value to absolute. */
315 if (relocatable)
316 output_base = 0;
317 else
318 output_base = output_section->vma;
319
320 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
321 relocation += output_base + symbol->section->output_offset;
322
323 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
324 {
325 /* Add in supplied addend. */
326 relocation += reloc_entry->addend;
327 }
328
329 /* Here the variable relocation holds the final address of the
330 symbol we are relocating against, plus any addend. */
331
332 if (howto->pc_relative)
333 {
334 relocation -= input_section->output_section->vma + input_section->output_offset;
335
336 if (howto->pcrel_offset)
337 relocation -= reloc_entry->address;
338 }
339
340 if (relocatable)
341 {
342 reloc_entry->address += input_section->output_offset;
343 reloc_entry->addend += symbol->section->output_offset;
344 }
345
346 if (howto->complain_on_overflow != complain_overflow_dont)
347 {
348 bfd_reloc_status_type status;
349
350 status = bfd_check_overflow (howto->complain_on_overflow,
351 howto->bitsize,
352 howto->rightshift,
353 bfd_arch_bits_per_address(abfd),
354 relocation);
355 if (status != bfd_reloc_ok)
356 return status;
357 }
358
359 /* If rightshift is 1 and the number odd, return error. */
360 if (howto->rightshift && (relocation & 0x01))
361 {
362 _bfd_error_handler (_("relocation should be even number"));
363 return bfd_reloc_overflow;
364 }
365
366 relocation >>= (bfd_vma) howto->rightshift;
367
368 /* Shift everything up to where it's going to be used. */
369
370 relocation <<= (bfd_vma) howto->bitpos;
371
372 #define DOIT(x) \
373 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
374
375 /* handle 8 and 16 bit relocations here. */
376 switch (howto->size)
377 {
378 case 0:
379 {
380 char x = bfd_get_8 (abfd, (char *) data + addr);
381 DOIT (x);
382 bfd_put_8 (abfd, x, (unsigned char *) data + addr);
383 }
384 break;
385
386 case 1:
387 {
388 unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
389 DOIT (x);
390 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
391 }
392 break;
393
394 default:
395 return bfd_reloc_other;
396 }
397
398 return bfd_reloc_ok;
399 }
400
401 /* HOWTO Table for blackfin.
402 Blackfin relocations are fairly complicated.
403 Some of the salient features are
404 a. Even numbered offsets. A number of (not all) relocations are
405 even numbered. This means that the rightmost bit is not stored.
406 Needs to right shift by 1 and check to see if value is not odd
407 b. A relocation can be an expression. An expression takes on
408 a variety of relocations arranged in a stack.
409 As a result, we cannot use the standard generic function as special
410 function. We will have our own, which is very similar to the standard
411 generic function except that it understands how to get the value from
412 the relocation stack. . */
413
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
420
421 static reloc_howto_type bfin_howto_table [] =
422 {
423 /* This reloc does nothing. . */
424 HOWTO (R_BFIN_UNUSED0, /* type. */
425 0, /* rightshift. */
426 3, /* size (0 = byte, 1 = short, 2 = long). */
427 0, /* bitsize. */
428 FALSE, /* pc_relative. */
429 0, /* bitpos. */
430 complain_overflow_dont, /* complain_on_overflow. */
431 bfd_elf_generic_reloc, /* special_function. */
432 "R_BFIN_UNUSED0", /* name. */
433 FALSE, /* partial_inplace. */
434 0, /* src_mask. */
435 0, /* dst_mask. */
436 FALSE), /* pcrel_offset. */
437
438 HOWTO (R_BFIN_PCREL5M2, /* type. */
439 1, /* rightshift. */
440 1, /* size (0 = byte, 1 = short, 2 = long).. */
441 4, /* bitsize. */
442 TRUE, /* pc_relative. */
443 0, /* bitpos. */
444 complain_overflow_unsigned, /* complain_on_overflow. */
445 bfin_bfd_reloc, /* special_function. */
446 "R_BFIN_PCREL5M2", /* name. */
447 FALSE, /* partial_inplace. */
448 0, /* src_mask. */
449 0x0000000F, /* dst_mask. */
450 FALSE), /* pcrel_offset. */
451
452 HOWTO (R_BFIN_UNUSED1, /* type. */
453 0, /* rightshift. */
454 3, /* size (0 = byte, 1 = short, 2 = long). */
455 0, /* bitsize. */
456 FALSE, /* pc_relative. */
457 0, /* bitpos. */
458 complain_overflow_dont, /* complain_on_overflow. */
459 bfd_elf_generic_reloc, /* special_function. */
460 "R_BFIN_UNUSED1", /* name. */
461 FALSE, /* partial_inplace. */
462 0, /* src_mask. */
463 0, /* dst_mask. */
464 FALSE), /* pcrel_offset. */
465
466 HOWTO (R_BFIN_PCREL10, /* type. */
467 1, /* rightshift. */
468 1, /* size (0 = byte, 1 = short, 2 = long). */
469 10, /* bitsize. */
470 TRUE, /* pc_relative. */
471 0, /* bitpos. */
472 complain_overflow_signed, /* complain_on_overflow. */
473 bfin_bfd_reloc, /* special_function. */
474 "R_BFIN_PCREL10", /* name. */
475 FALSE, /* partial_inplace. */
476 0, /* src_mask. */
477 0x000003FF, /* dst_mask. */
478 TRUE), /* pcrel_offset. */
479
480 HOWTO (R_BFIN_PCREL12_JUMP, /* type. */
481 1, /* rightshift. */
482 /* the offset is actually 13 bit
483 aligned on a word boundary so
484 only 12 bits have to be used.
485 Right shift the rightmost bit.. */
486 1, /* size (0 = byte, 1 = short, 2 = long). */
487 12, /* bitsize. */
488 TRUE, /* pc_relative. */
489 0, /* bitpos. */
490 complain_overflow_signed, /* complain_on_overflow. */
491 bfin_bfd_reloc, /* special_function. */
492 "R_BFIN_PCREL12_JUMP", /* name. */
493 FALSE, /* partial_inplace. */
494 0, /* src_mask. */
495 0x0FFF, /* dst_mask. */
496 TRUE), /* pcrel_offset. */
497
498 HOWTO (R_BFIN_RIMM16, /* type. */
499 0, /* rightshift. */
500 1, /* size (0 = byte, 1 = short, 2 = long). */
501 16, /* bitsize. */
502 FALSE, /* pc_relative. */
503 0, /* bitpos. */
504 complain_overflow_signed, /* complain_on_overflow. */
505 bfin_imm16_reloc, /* special_function. */
506 "R_BFIN_RIMM16", /* name. */
507 FALSE, /* partial_inplace. */
508 0, /* src_mask. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE), /* pcrel_offset. */
511
512 HOWTO (R_BFIN_LUIMM16, /* type. */
513 0, /* rightshift. */
514 1, /* size (0 = byte, 1 = short, 2 = long). */
515 16, /* bitsize. */
516 FALSE, /* pc_relative. */
517 0, /* bitpos. */
518 complain_overflow_dont, /* complain_on_overflow. */
519 bfin_imm16_reloc, /* special_function. */
520 "R_BFIN_LUIMM16", /* name. */
521 FALSE, /* partial_inplace. */
522 0, /* src_mask. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE), /* pcrel_offset. */
525
526 HOWTO (R_BFIN_HUIMM16, /* type. */
527 16, /* rightshift. */
528 1, /* size (0 = byte, 1 = short, 2 = long). */
529 16, /* bitsize. */
530 FALSE, /* pc_relative. */
531 0, /* bitpos. */
532 complain_overflow_unsigned, /* complain_on_overflow. */
533 bfin_imm16_reloc, /* special_function. */
534 "R_BFIN_HUIMM16", /* name. */
535 FALSE, /* partial_inplace. */
536 0, /* src_mask. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE), /* pcrel_offset. */
539
540 HOWTO (R_BFIN_PCREL12_JUMP_S, /* type. */
541 1, /* rightshift. */
542 1, /* size (0 = byte, 1 = short, 2 = long). */
543 12, /* bitsize. */
544 TRUE, /* pc_relative. */
545 0, /* bitpos. */
546 complain_overflow_signed, /* complain_on_overflow. */
547 bfin_bfd_reloc, /* special_function. */
548 "R_BFIN_PCREL12_JUMP_S", /* name. */
549 FALSE, /* partial_inplace. */
550 0, /* src_mask. */
551 0x00000FFF, /* dst_mask. */
552 TRUE), /* pcrel_offset. */
553
554 HOWTO (R_BFIN_PCREL24_JUMP_X, /* type. */
555 1, /* rightshift. */
556 2, /* size (0 = byte, 1 = short, 2 = long). */
557 24, /* bitsize. */
558 TRUE, /* pc_relative. */
559 0, /* bitpos. */
560 complain_overflow_signed, /* complain_on_overflow. */
561 bfin_pcrel24_reloc, /* special_function. */
562 "R_BFIN_PCREL24_JUMP_X", /* name. */
563 FALSE, /* partial_inplace. */
564 0, /* src_mask. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE), /* pcrel_offset. */
567
568 HOWTO (R_BFIN_PCREL24, /* type. */
569 1, /* rightshift. */
570 2, /* size (0 = byte, 1 = short, 2 = long). */
571 24, /* bitsize. */
572 TRUE, /* pc_relative. */
573 0, /* bitpos. */
574 complain_overflow_signed, /* complain_on_overflow. */
575 bfin_pcrel24_reloc, /* special_function. */
576 "R_BFIN_PCREL24", /* name. */
577 FALSE, /* partial_inplace. */
578 0, /* src_mask. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE), /* pcrel_offset. */
581
582 HOWTO (R_BFIN_UNUSEDB, /* type. */
583 0, /* rightshift. */
584 3, /* size (0 = byte, 1 = short, 2 = long). */
585 0, /* bitsize. */
586 FALSE, /* pc_relative. */
587 0, /* bitpos. */
588 complain_overflow_dont, /* complain_on_overflow. */
589 bfd_elf_generic_reloc, /* special_function. */
590 "R_BFIN_UNUSEDB", /* name. */
591 FALSE, /* partial_inplace. */
592 0, /* src_mask. */
593 0, /* dst_mask. */
594 FALSE), /* pcrel_offset. */
595
596 HOWTO (R_BFIN_UNUSEDC, /* type. */
597 0, /* rightshift. */
598 3, /* size (0 = byte, 1 = short, 2 = long). */
599 0, /* bitsize. */
600 FALSE, /* pc_relative. */
601 0, /* bitpos. */
602 complain_overflow_dont, /* complain_on_overflow. */
603 bfd_elf_generic_reloc, /* special_function. */
604 "R_BFIN_UNUSEDC", /* name. */
605 FALSE, /* partial_inplace. */
606 0, /* src_mask. */
607 0, /* dst_mask. */
608 FALSE), /* pcrel_offset. */
609
610 HOWTO (R_BFIN_PCREL24_JUMP_L, /* type. */
611 1, /* rightshift. */
612 2, /* size (0 = byte, 1 = short, 2 = long). */
613 24, /* bitsize. */
614 TRUE, /* pc_relative. */
615 0, /* bitpos. */
616 complain_overflow_signed, /* complain_on_overflow. */
617 bfin_pcrel24_reloc, /* special_function. */
618 "R_BFIN_PCREL24_JUMP_L", /* name. */
619 FALSE, /* partial_inplace. */
620 0, /* src_mask. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE), /* pcrel_offset. */
623
624 HOWTO (R_BFIN_PCREL24_CALL_X, /* type. */
625 1, /* rightshift. */
626 2, /* size (0 = byte, 1 = short, 2 = long). */
627 24, /* bitsize. */
628 TRUE, /* pc_relative. */
629 0, /* bitpos. */
630 complain_overflow_signed, /* complain_on_overflow. */
631 bfin_pcrel24_reloc, /* special_function. */
632 "R_BFIN_PCREL24_CALL_X", /* name. */
633 FALSE, /* partial_inplace. */
634 0, /* src_mask. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE), /* pcrel_offset. */
637
638 HOWTO (R_BFIN_VAR_EQ_SYMB, /* type. */
639 0, /* rightshift. */
640 2, /* size (0 = byte, 1 = short, 2 = long). */
641 32, /* bitsize. */
642 FALSE, /* pc_relative. */
643 0, /* bitpos. */
644 complain_overflow_bitfield, /* complain_on_overflow. */
645 bfin_bfd_reloc, /* special_function. */
646 "R_BFIN_VAR_EQ_SYMB", /* name. */
647 FALSE, /* partial_inplace. */
648 0, /* src_mask. */
649 0, /* dst_mask. */
650 FALSE), /* pcrel_offset. */
651
652 HOWTO (R_BFIN_BYTE_DATA, /* type. */
653 0, /* rightshift. */
654 0, /* size (0 = byte, 1 = short, 2 = long). */
655 8, /* bitsize. */
656 FALSE, /* pc_relative. */
657 0, /* bitpos. */
658 complain_overflow_unsigned, /* complain_on_overflow. */
659 bfin_bfd_reloc, /* special_function. */
660 "R_BFIN_BYTE_DATA", /* name. */
661 FALSE, /* partial_inplace. */
662 0, /* src_mask. */
663 0xFF, /* dst_mask. */
664 TRUE), /* pcrel_offset. */
665
666 HOWTO (R_BFIN_BYTE2_DATA, /* type. */
667 0, /* rightshift. */
668 1, /* size (0 = byte, 1 = short, 2 = long). */
669 16, /* bitsize. */
670 FALSE, /* pc_relative. */
671 0, /* bitpos. */
672 complain_overflow_signed, /* complain_on_overflow. */
673 bfin_bfd_reloc, /* special_function. */
674 "R_BFIN_BYTE2_DATA", /* name. */
675 FALSE, /* partial_inplace. */
676 0, /* src_mask. */
677 0xFFFF, /* dst_mask. */
678 TRUE), /* pcrel_offset. */
679
680 HOWTO (R_BFIN_BYTE4_DATA, /* type. */
681 0, /* rightshift. */
682 2, /* size (0 = byte, 1 = short, 2 = long). */
683 32, /* bitsize. */
684 FALSE, /* pc_relative. */
685 0, /* bitpos. */
686 complain_overflow_unsigned, /* complain_on_overflow. */
687 bfin_byte4_reloc, /* special_function. */
688 "R_BFIN_BYTE4_DATA", /* name. */
689 FALSE, /* partial_inplace. */
690 0, /* src_mask. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE), /* pcrel_offset. */
693
694 HOWTO (R_BFIN_PCREL11, /* type. */
695 1, /* rightshift. */
696 1, /* size (0 = byte, 1 = short, 2 = long). */
697 10, /* bitsize. */
698 TRUE, /* pc_relative. */
699 0, /* bitpos. */
700 complain_overflow_unsigned, /* complain_on_overflow. */
701 bfin_bfd_reloc, /* special_function. */
702 "R_BFIN_PCREL11", /* name. */
703 FALSE, /* partial_inplace. */
704 0, /* src_mask. */
705 0x000003FF, /* dst_mask. */
706 FALSE), /* pcrel_offset. */
707
708
709 /* A 18-bit signed operand with the GOT offset for the address of
710 the symbol. */
711 HOWTO (R_BFIN_GOT17M4, /* type */
712 2, /* rightshift */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
714 16, /* bitsize */
715 FALSE, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_signed, /* complain_on_overflow */
718 bfd_elf_generic_reloc, /* special_function */
719 "R_BFIN_GOT17M4", /* name */
720 FALSE, /* partial_inplace */
721 0xffff, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* The upper 16 bits of the GOT offset for the address of the
726 symbol. */
727 HOWTO (R_BFIN_GOTHI, /* type */
728 0, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_BFIN_GOTHI", /* name */
736 FALSE, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* The lower 16 bits of the GOT offset for the address of the
742 symbol. */
743 HOWTO (R_BFIN_GOTLO, /* type */
744 0, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_BFIN_GOTLO", /* name */
752 FALSE, /* partial_inplace */
753 0xffff, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* The 32-bit address of the canonical descriptor of a function. */
758 HOWTO (R_BFIN_FUNCDESC, /* type */
759 0, /* rightshift */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
761 32, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_bitfield, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_BFIN_FUNCDESC", /* name */
767 FALSE, /* partial_inplace */
768 0xffffffff, /* src_mask */
769 0xffffffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* A 12-bit signed operand with the GOT offset for the address of
773 canonical descriptor of a function. */
774 HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */
775 2, /* rightshift */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
777 16, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_signed, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 FALSE, /* partial_inplace */
784 0xffff, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The upper 16 bits of the GOT offset for the address of the
789 canonical descriptor of a function. */
790 HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */
791 0, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 FALSE, /* partial_inplace */
800 0xffff, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The lower 16 bits of the GOT offset for the address of the
805 canonical descriptor of a function. */
806 HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */
807 0, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 FALSE, /* partial_inplace */
816 0xffff, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The 32-bit address of the canonical descriptor of a function. */
821 HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */
822 0, /* rightshift */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
824 64, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_bitfield, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_BFIN_FUNCDESC_VALUE", /* name */
830 FALSE, /* partial_inplace */
831 0xffffffff, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* A 12-bit signed operand with the GOT offset for the address of
836 canonical descriptor of a function. */
837 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */
838 2, /* rightshift */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
840 16, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_signed, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 FALSE, /* partial_inplace */
847 0xffff, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* The upper 16 bits of the GOT offset for the address of the
852 canonical descriptor of a function. */
853 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */
854 0, /* rightshift */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
856 16, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 FALSE, /* partial_inplace */
863 0xffff, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* The lower 16 bits of the GOT offset for the address of the
868 canonical descriptor of a function. */
869 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */
870 0, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 FALSE, /* partial_inplace */
879 0xffff, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* A 12-bit signed operand with the GOT offset for the address of
884 the symbol. */
885 HOWTO (R_BFIN_GOTOFF17M4, /* type */
886 2, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_signed, /* complain_on_overflow */
892 bfd_elf_generic_reloc, /* special_function */
893 "R_BFIN_GOTOFF17M4", /* name */
894 FALSE, /* partial_inplace */
895 0xffff, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* The upper 16 bits of the GOT offset for the address of the
900 symbol. */
901 HOWTO (R_BFIN_GOTOFFHI, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_dont, /* complain_on_overflow */
908 bfd_elf_generic_reloc, /* special_function */
909 "R_BFIN_GOTOFFHI", /* name */
910 FALSE, /* partial_inplace */
911 0xffff, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* The lower 16 bits of the GOT offset for the address of the
916 symbol. */
917 HOWTO (R_BFIN_GOTOFFLO, /* type */
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 bfd_elf_generic_reloc, /* special_function */
925 "R_BFIN_GOTOFFLO", /* name */
926 FALSE, /* partial_inplace */
927 0xffff, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930 };
931
932 static reloc_howto_type bfin_gnuext_howto_table [] =
933 {
934 HOWTO (R_BFIN_PLTPC, /* type. */
935 0, /* rightshift. */
936 1, /* size (0 = byte, 1 = short, 2 = long). */
937 16, /* bitsize. */
938 FALSE, /* pc_relative. */
939 0, /* bitpos. */
940 complain_overflow_bitfield, /* complain_on_overflow. */
941 bfin_pltpc_reloc, /* special_function. */
942 "R_BFIN_PLTPC", /* name. */
943 FALSE, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE), /* pcrel_offset. */
947
948 HOWTO (R_BFIN_GOT, /* type. */
949 0, /* rightshift. */
950 1, /* size (0 = byte, 1 = short, 2 = long). */
951 16, /* bitsize. */
952 FALSE, /* pc_relative. */
953 0, /* bitpos. */
954 complain_overflow_bitfield, /* complain_on_overflow. */
955 bfd_elf_generic_reloc, /* special_function. */
956 "R_BFIN_GOT", /* name. */
957 FALSE, /* partial_inplace. */
958 0x7fff, /* src_mask. */
959 0x7fff, /* dst_mask. */
960 FALSE), /* pcrel_offset. */
961
962 /* GNU extension to record C++ vtable hierarchy. */
963 HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */
964 0, /* rightshift. */
965 2, /* size (0 = byte, 1 = short, 2 = long). */
966 0, /* bitsize. */
967 FALSE, /* pc_relative. */
968 0, /* bitpos. */
969 complain_overflow_dont, /* complain_on_overflow. */
970 NULL, /* special_function. */
971 "R_BFIN_GNU_VTINHERIT", /* name. */
972 FALSE, /* partial_inplace. */
973 0, /* src_mask. */
974 0, /* dst_mask. */
975 FALSE), /* pcrel_offset. */
976
977 /* GNU extension to record C++ vtable member usage. */
978 HOWTO (R_BFIN_GNU_VTENTRY, /* type. */
979 0, /* rightshift. */
980 2, /* size (0 = byte, 1 = short, 2 = long). */
981 0, /* bitsize. */
982 FALSE, /* pc_relative. */
983 0, /* bitpos. */
984 complain_overflow_dont, /* complain_on_overflow. */
985 _bfd_elf_rel_vtable_reloc_fn, /* special_function. */
986 "R_BFIN_GNU_VTENTRY", /* name. */
987 FALSE, /* partial_inplace. */
988 0, /* src_mask. */
989 0, /* dst_mask. */
990 FALSE) /* pcrel_offset. */
991 };
992
993 struct bfin_reloc_map
994 {
995 bfd_reloc_code_real_type bfd_reloc_val;
996 unsigned int bfin_reloc_val;
997 };
998
999 static const struct bfin_reloc_map bfin_reloc_map [] =
1000 {
1001 { BFD_RELOC_NONE, R_BFIN_UNUSED0 },
1002 { BFD_RELOC_BFIN_5_PCREL, R_BFIN_PCREL5M2 },
1003 { BFD_RELOC_NONE, R_BFIN_UNUSED1 },
1004 { BFD_RELOC_BFIN_10_PCREL, R_BFIN_PCREL10 },
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_BFIN_PCREL12_JUMP },
1006 { BFD_RELOC_BFIN_16_IMM, R_BFIN_RIMM16 },
1007 { BFD_RELOC_BFIN_16_LOW, R_BFIN_LUIMM16 },
1008 { BFD_RELOC_BFIN_16_HIGH, R_BFIN_HUIMM16 },
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_BFIN_PCREL12_JUMP_S },
1010 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1011 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_BFIN_PCREL24_JUMP_L },
1013 { BFD_RELOC_NONE, R_BFIN_UNUSEDB },
1014 { BFD_RELOC_NONE, R_BFIN_UNUSEDC },
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_BFIN_PCREL24_CALL_X },
1016 { BFD_RELOC_8, R_BFIN_BYTE_DATA },
1017 { BFD_RELOC_16, R_BFIN_BYTE2_DATA },
1018 { BFD_RELOC_32, R_BFIN_BYTE4_DATA },
1019 { BFD_RELOC_BFIN_11_PCREL, R_BFIN_PCREL11 },
1020 { BFD_RELOC_BFIN_GOT, R_BFIN_GOT },
1021 { BFD_RELOC_BFIN_PLTPC, R_BFIN_PLTPC },
1022
1023 { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 },
1024 { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI },
1025 { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO },
1026 { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC },
1027 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 },
1028 { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI },
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO },
1030 { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE },
1031 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 },
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI },
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO },
1034 { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 },
1035 { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI },
1036 { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO },
1037
1038 { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT },
1039 { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY },
1040 };
1041
1042
1043 static void
1044 bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1045 arelent *cache_ptr,
1046 Elf_Internal_Rela *dst)
1047 {
1048 unsigned int r_type;
1049
1050 r_type = ELF32_R_TYPE (dst->r_info);
1051
1052 if (r_type <= BFIN_RELOC_MAX)
1053 cache_ptr->howto = &bfin_howto_table [r_type];
1054
1055 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1056 cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1057
1058 else
1059 cache_ptr->howto = (reloc_howto_type *) NULL;
1060 }
1061
1062 /* Given a BFD reloc type, return the howto. */
1063 static reloc_howto_type *
1064 bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1065 bfd_reloc_code_real_type code)
1066 {
1067 unsigned int i;
1068 unsigned int r_type = (unsigned int) -1;
1069
1070 for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); i--;)
1071 if (bfin_reloc_map[i].bfd_reloc_val == code)
1072 r_type = bfin_reloc_map[i].bfin_reloc_val;
1073
1074 if (r_type <= BFIN_RELOC_MAX)
1075 return &bfin_howto_table [r_type];
1076
1077 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1078 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1079
1080 return (reloc_howto_type *) NULL;
1081 }
1082
1083 static reloc_howto_type *
1084 bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1085 const char *r_name)
1086 {
1087 unsigned int i;
1088
1089 for (i = 0;
1090 i < (sizeof (bfin_howto_table)
1091 / sizeof (bfin_howto_table[0]));
1092 i++)
1093 if (bfin_howto_table[i].name != NULL
1094 && strcasecmp (bfin_howto_table[i].name, r_name) == 0)
1095 return &bfin_howto_table[i];
1096
1097 for (i = 0;
1098 i < (sizeof (bfin_gnuext_howto_table)
1099 / sizeof (bfin_gnuext_howto_table[0]));
1100 i++)
1101 if (bfin_gnuext_howto_table[i].name != NULL
1102 && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0)
1103 return &bfin_gnuext_howto_table[i];
1104
1105 return NULL;
1106 }
1107
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type *
1110 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1111 unsigned int r_type)
1112 {
1113 if (r_type <= BFIN_RELOC_MAX)
1114 return &bfin_howto_table [r_type];
1115
1116 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1117 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1118
1119 return (reloc_howto_type *) NULL;
1120 }
1121
1122 /* Set by ld emulation if --code-in-l1. */
1123 bfd_boolean elf32_bfin_code_in_l1 = 0;
1124
1125 /* Set by ld emulation if --data-in-l1. */
1126 bfd_boolean elf32_bfin_data_in_l1 = 0;
1127
1128 static void
1129 elf32_bfin_final_write_processing (bfd *abfd,
1130 bfd_boolean linker ATTRIBUTE_UNUSED)
1131 {
1132 if (elf32_bfin_code_in_l1)
1133 elf_elfheader (abfd)->e_flags |= EF_BFIN_CODE_IN_L1;
1134 if (elf32_bfin_data_in_l1)
1135 elf_elfheader (abfd)->e_flags |= EF_BFIN_DATA_IN_L1;
1136 }
1137
1138 /* Return TRUE if the name is a local label.
1139 bfin local labels begin with L$. */
1140 static bfd_boolean
1141 bfin_is_local_label_name (bfd *abfd, const char *label)
1142 {
1143 if (label[0] == 'L' && label[1] == '$' )
1144 return TRUE;
1145
1146 return _bfd_elf_is_local_label_name (abfd, label);
1147 }
1148 \f
1149 /* Look through the relocs for a section during the first phase, and
1150 allocate space in the global offset table or procedure linkage
1151 table. */
1152
1153 static bfd_boolean
1154 bfin_check_relocs (bfd * abfd,
1155 struct bfd_link_info *info,
1156 asection *sec,
1157 const Elf_Internal_Rela *relocs)
1158 {
1159 bfd *dynobj;
1160 Elf_Internal_Shdr *symtab_hdr;
1161 struct elf_link_hash_entry **sym_hashes;
1162 bfd_signed_vma *local_got_refcounts;
1163 const Elf_Internal_Rela *rel;
1164 const Elf_Internal_Rela *rel_end;
1165 asection *sgot;
1166 asection *srelgot;
1167
1168 if (bfd_link_relocatable (info))
1169 return TRUE;
1170
1171 dynobj = elf_hash_table (info)->dynobj;
1172 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1173 sym_hashes = elf_sym_hashes (abfd);
1174 local_got_refcounts = elf_local_got_refcounts (abfd);
1175
1176 sgot = NULL;
1177 srelgot = NULL;
1178
1179 rel_end = relocs + sec->reloc_count;
1180 for (rel = relocs; rel < rel_end; rel++)
1181 {
1182 unsigned long r_symndx;
1183 struct elf_link_hash_entry *h;
1184
1185 r_symndx = ELF32_R_SYM (rel->r_info);
1186 if (r_symndx < symtab_hdr->sh_info)
1187 h = NULL;
1188 else
1189 {
1190 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1191 }
1192
1193 switch (ELF32_R_TYPE (rel->r_info))
1194 {
1195 /* This relocation describes the C++ object vtable hierarchy.
1196 Reconstruct it for later use during GC. */
1197 case R_BFIN_GNU_VTINHERIT:
1198 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1199 return FALSE;
1200 break;
1201
1202 /* This relocation describes which C++ vtable entries
1203 are actually used. Record for later use during GC. */
1204 case R_BFIN_GNU_VTENTRY:
1205 BFD_ASSERT (h != NULL);
1206 if (h != NULL
1207 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1208 return FALSE;
1209 break;
1210
1211 case R_BFIN_GOT:
1212 if (h != NULL
1213 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1214 break;
1215 /* Fall through. */
1216
1217 if (dynobj == NULL)
1218 {
1219 /* Create the .got section. */
1220 elf_hash_table (info)->dynobj = dynobj = abfd;
1221 if (!_bfd_elf_create_got_section (dynobj, info))
1222 return FALSE;
1223 }
1224
1225 sgot = elf_hash_table (info)->sgot;
1226 srelgot = elf_hash_table (info)->srelgot;
1227 BFD_ASSERT (sgot != NULL);
1228
1229 if (h != NULL)
1230 {
1231 if (h->got.refcount == 0)
1232 {
1233 /* Make sure this symbol is output as a dynamic symbol. */
1234 if (h->dynindx == -1 && !h->forced_local)
1235 {
1236 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1237 return FALSE;
1238 }
1239
1240 /* Allocate space in the .got section. */
1241 sgot->size += 4;
1242 /* Allocate relocation space. */
1243 srelgot->size += sizeof (Elf32_External_Rela);
1244 }
1245 h->got.refcount++;
1246 }
1247 else
1248 {
1249 /* This is a global offset table entry for a local symbol. */
1250 if (local_got_refcounts == NULL)
1251 {
1252 bfd_size_type size;
1253
1254 size = symtab_hdr->sh_info;
1255 size *= sizeof (bfd_signed_vma);
1256 local_got_refcounts = ((bfd_signed_vma *)
1257 bfd_zalloc (abfd, size));
1258 if (local_got_refcounts == NULL)
1259 return FALSE;
1260 elf_local_got_refcounts (abfd) = local_got_refcounts;
1261 }
1262 if (local_got_refcounts[r_symndx] == 0)
1263 {
1264 sgot->size += 4;
1265 if (bfd_link_pic (info))
1266 {
1267 /* If we are generating a shared object, we need to
1268 output a R_68K_RELATIVE reloc so that the dynamic
1269 linker can adjust this GOT entry. */
1270 srelgot->size += sizeof (Elf32_External_Rela);
1271 }
1272 }
1273 local_got_refcounts[r_symndx]++;
1274 }
1275 break;
1276
1277 default:
1278 break;
1279 }
1280 }
1281
1282 return TRUE;
1283 }
1284
1285 static enum elf_reloc_type_class
1286 elf32_bfin_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1287 const asection *rel_sec ATTRIBUTE_UNUSED,
1288 const Elf_Internal_Rela * rela)
1289 {
1290 switch ((int) ELF32_R_TYPE (rela->r_info))
1291 {
1292 default:
1293 return reloc_class_normal;
1294 }
1295 }
1296 \f
1297 static bfd_reloc_status_type
1298 bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto,
1299 bfd *input_bfd, asection *input_section,
1300 bfd_byte *contents, bfd_vma address,
1301 bfd_vma value, bfd_vma addend)
1302 {
1303 int r_type = ELF32_R_TYPE (rel->r_info);
1304
1305 if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L)
1306 {
1307 bfd_reloc_status_type r = bfd_reloc_ok;
1308 bfd_vma x;
1309
1310 if (address > bfd_get_section_limit (input_bfd, input_section))
1311 return bfd_reloc_outofrange;
1312
1313 value += addend;
1314
1315 /* Perform usual pc-relative correction. */
1316 value -= input_section->output_section->vma + input_section->output_offset;
1317 value -= address;
1318
1319 /* We are getting reloc_entry->address 2 byte off from
1320 the start of instruction. Assuming absolute postion
1321 of the reloc data. But, following code had been written assuming
1322 reloc address is starting at begining of instruction.
1323 To compensate that I have increased the value of
1324 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1325
1326 value += 2;
1327 address -= 2;
1328
1329 if ((value & 0xFF000000) != 0
1330 && (value & 0xFF000000) != 0xFF000000)
1331 r = bfd_reloc_overflow;
1332
1333 value >>= 1;
1334
1335 x = bfd_get_16 (input_bfd, contents + address);
1336 x = (x & 0xff00) | ((value >> 16) & 0xff);
1337 bfd_put_16 (input_bfd, x, contents + address);
1338
1339 x = bfd_get_16 (input_bfd, contents + address + 2);
1340 x = value & 0xFFFF;
1341 bfd_put_16 (input_bfd, x, contents + address + 2);
1342 return r;
1343 }
1344
1345 return _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1346 rel->r_offset, value, addend);
1347
1348 }
1349
1350 static bfd_boolean
1351 bfin_relocate_section (bfd * output_bfd,
1352 struct bfd_link_info *info,
1353 bfd * input_bfd,
1354 asection * input_section,
1355 bfd_byte * contents,
1356 Elf_Internal_Rela * relocs,
1357 Elf_Internal_Sym * local_syms,
1358 asection ** local_sections)
1359 {
1360 bfd *dynobj;
1361 Elf_Internal_Shdr *symtab_hdr;
1362 struct elf_link_hash_entry **sym_hashes;
1363 bfd_vma *local_got_offsets;
1364 asection *sgot;
1365 Elf_Internal_Rela *rel;
1366 Elf_Internal_Rela *relend;
1367 int i = 0;
1368
1369 dynobj = elf_hash_table (info)->dynobj;
1370 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1371 sym_hashes = elf_sym_hashes (input_bfd);
1372 local_got_offsets = elf_local_got_offsets (input_bfd);
1373
1374 sgot = NULL;
1375
1376 rel = relocs;
1377 relend = relocs + input_section->reloc_count;
1378 for (; rel < relend; rel++, i++)
1379 {
1380 int r_type;
1381 reloc_howto_type *howto;
1382 unsigned long r_symndx;
1383 struct elf_link_hash_entry *h;
1384 Elf_Internal_Sym *sym;
1385 asection *sec;
1386 bfd_vma relocation = 0;
1387 bfd_boolean unresolved_reloc;
1388 bfd_reloc_status_type r;
1389 bfd_vma address;
1390
1391 r_type = ELF32_R_TYPE (rel->r_info);
1392 if (r_type < 0 || r_type >= 243)
1393 {
1394 bfd_set_error (bfd_error_bad_value);
1395 return FALSE;
1396 }
1397
1398 if (r_type == R_BFIN_GNU_VTENTRY
1399 || r_type == R_BFIN_GNU_VTINHERIT)
1400 continue;
1401
1402 howto = bfin_reloc_type_lookup (input_bfd, r_type);
1403 if (howto == NULL)
1404 {
1405 bfd_set_error (bfd_error_bad_value);
1406 return FALSE;
1407 }
1408 r_symndx = ELF32_R_SYM (rel->r_info);
1409
1410 h = NULL;
1411 sym = NULL;
1412 sec = NULL;
1413 unresolved_reloc = FALSE;
1414
1415 if (r_symndx < symtab_hdr->sh_info)
1416 {
1417 sym = local_syms + r_symndx;
1418 sec = local_sections[r_symndx];
1419 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1420 }
1421 else
1422 {
1423 bfd_boolean warned, ignored;
1424
1425 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1426 r_symndx, symtab_hdr, sym_hashes,
1427 h, sec, relocation,
1428 unresolved_reloc, warned, ignored);
1429 }
1430
1431 if (sec != NULL && discarded_section (sec))
1432 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1433 rel, 1, relend, howto, 0, contents);
1434
1435 if (bfd_link_relocatable (info))
1436 continue;
1437
1438 address = rel->r_offset;
1439
1440 /* Then, process normally. */
1441 switch (r_type)
1442 {
1443 case R_BFIN_GNU_VTINHERIT:
1444 case R_BFIN_GNU_VTENTRY:
1445 return bfd_reloc_ok;
1446
1447 case R_BFIN_GOT:
1448 /* Relocation is to the address of the entry for this symbol
1449 in the global offset table. */
1450 if (h != NULL
1451 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1452 goto do_default;
1453 /* Fall through. */
1454 /* Relocation is the offset of the entry for this symbol in
1455 the global offset table. */
1456
1457 {
1458 bfd_vma off;
1459
1460 if (dynobj == NULL)
1461 {
1462 /* Create the .got section. */
1463 elf_hash_table (info)->dynobj = dynobj = output_bfd;
1464 if (!_bfd_elf_create_got_section (dynobj, info))
1465 return FALSE;
1466 }
1467
1468 sgot = elf_hash_table (info)->sgot;
1469 BFD_ASSERT (sgot != NULL);
1470
1471 if (h != NULL)
1472 {
1473 bfd_boolean dyn;
1474
1475 off = h->got.offset;
1476 BFD_ASSERT (off != (bfd_vma) - 1);
1477 dyn = elf_hash_table (info)->dynamic_sections_created;
1478
1479 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1480 bfd_link_pic (info),
1481 h)
1482 || (bfd_link_pic (info)
1483 && (info->symbolic
1484 || h->dynindx == -1
1485 || h->forced_local)
1486 && h->def_regular))
1487 {
1488 /* This is actually a static link, or it is a
1489 -Bsymbolic link and the symbol is defined
1490 locally, or the symbol was forced to be local
1491 because of a version file.. We must initialize
1492 this entry in the global offset table. Since
1493 the offset must always be a multiple of 4, we
1494 use the least significant bit to record whether
1495 we have initialized it already.
1496
1497 When doing a dynamic link, we create a .rela.got
1498 relocation entry to initialize the value. This
1499 is done in the finish_dynamic_symbol routine. */
1500 if ((off & 1) != 0)
1501 off &= ~1;
1502 else
1503 {
1504 bfd_put_32 (output_bfd, relocation,
1505 sgot->contents + off);
1506 h->got.offset |= 1;
1507 }
1508 }
1509 else
1510 unresolved_reloc = FALSE;
1511 }
1512 else
1513 {
1514 BFD_ASSERT (local_got_offsets != NULL);
1515 off = local_got_offsets[r_symndx];
1516 BFD_ASSERT (off != (bfd_vma) - 1);
1517
1518 /* The offset must always be a multiple of 4. We use
1519 the least significant bit to record whether we have
1520 already generated the necessary reloc. */
1521 if ((off & 1) != 0)
1522 off &= ~1;
1523 else
1524 {
1525 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1526
1527 if (bfd_link_pic (info))
1528 {
1529 asection *s;
1530 Elf_Internal_Rela outrel;
1531 bfd_byte *loc;
1532
1533 s = elf_hash_table (info)->srelgot;
1534 BFD_ASSERT (s != NULL);
1535
1536 outrel.r_offset = (sgot->output_section->vma
1537 + sgot->output_offset + off);
1538 outrel.r_info =
1539 ELF32_R_INFO (0, R_BFIN_PCREL24);
1540 outrel.r_addend = relocation;
1541 loc = s->contents;
1542 loc +=
1543 s->reloc_count++ * sizeof (Elf32_External_Rela);
1544 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1545 }
1546
1547 local_got_offsets[r_symndx] |= 1;
1548 }
1549 }
1550
1551 relocation = sgot->output_offset + off;
1552 rel->r_addend = 0;
1553 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1554 relocation /= 4;
1555 }
1556 goto do_default;
1557
1558 default:
1559 do_default:
1560 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
1561 contents, address,
1562 relocation, rel->r_addend);
1563
1564 break;
1565 }
1566
1567 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1568 because such sections are not SEC_ALLOC and thus ld.so will
1569 not process them. */
1570 if (unresolved_reloc
1571 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)
1572 && _bfd_elf_section_offset (output_bfd, info, input_section,
1573 rel->r_offset) != (bfd_vma) -1)
1574 {
1575 _bfd_error_handler
1576 /* xgettext:c-format */
1577 (_("%pB(%pA+%#" PRIx64 "): "
1578 "unresolvable relocation against symbol `%s'"),
1579 input_bfd, input_section, (uint64_t) rel->r_offset,
1580 h->root.root.string);
1581 return FALSE;
1582 }
1583
1584 if (r != bfd_reloc_ok)
1585 {
1586 const char *name;
1587
1588 if (h != NULL)
1589 name = h->root.root.string;
1590 else
1591 {
1592 name = bfd_elf_string_from_elf_section (input_bfd,
1593 symtab_hdr->sh_link,
1594 sym->st_name);
1595 if (name == NULL)
1596 return FALSE;
1597 if (*name == '\0')
1598 name = bfd_section_name (input_bfd, sec);
1599 }
1600
1601 if (r == bfd_reloc_overflow)
1602 (*info->callbacks->reloc_overflow)
1603 (info, (h ? &h->root : NULL), name, howto->name,
1604 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1605 else
1606 {
1607 _bfd_error_handler
1608 /* xgettext:c-format */
1609 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
1610 input_bfd, input_section, (uint64_t) rel->r_offset,
1611 name, (int) r);
1612 return FALSE;
1613 }
1614 }
1615 }
1616
1617 return TRUE;
1618 }
1619
1620 static asection *
1621 bfin_gc_mark_hook (asection * sec,
1622 struct bfd_link_info *info,
1623 Elf_Internal_Rela * rel,
1624 struct elf_link_hash_entry *h,
1625 Elf_Internal_Sym * sym)
1626 {
1627 if (h != NULL)
1628 switch (ELF32_R_TYPE (rel->r_info))
1629 {
1630 case R_BFIN_GNU_VTINHERIT:
1631 case R_BFIN_GNU_VTENTRY:
1632 return NULL;
1633 }
1634
1635 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1636 }
1637 \f
1638 extern const bfd_target bfin_elf32_fdpic_vec;
1639 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1640
1641 /* An extension of the elf hash table data structure,
1642 containing some additional Blackfin-specific data. */
1643 struct bfinfdpic_elf_link_hash_table
1644 {
1645 struct elf_link_hash_table elf;
1646
1647 /* A pointer to the .rofixup section. */
1648 asection *sgotfixup;
1649 /* GOT base offset. */
1650 bfd_vma got0;
1651 /* Location of the first non-lazy PLT entry, i.e., the number of
1652 bytes taken by lazy PLT entries. */
1653 bfd_vma plt0;
1654 /* A hash table holding information about which symbols were
1655 referenced with which PIC-related relocations. */
1656 struct htab *relocs_info;
1657 /* Summary reloc information collected by
1658 _bfinfdpic_count_got_plt_entries. */
1659 struct _bfinfdpic_dynamic_got_info *g;
1660 };
1661
1662 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1663
1664 #define bfinfdpic_hash_table(info) \
1665 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1666 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1667
1668 #define bfinfdpic_got_section(info) \
1669 (bfinfdpic_hash_table (info)->elf.sgot)
1670 #define bfinfdpic_gotrel_section(info) \
1671 (bfinfdpic_hash_table (info)->elf.srelgot)
1672 #define bfinfdpic_gotfixup_section(info) \
1673 (bfinfdpic_hash_table (info)->sgotfixup)
1674 #define bfinfdpic_plt_section(info) \
1675 (bfinfdpic_hash_table (info)->elf.splt)
1676 #define bfinfdpic_pltrel_section(info) \
1677 (bfinfdpic_hash_table (info)->elf.srelplt)
1678 #define bfinfdpic_relocs_info(info) \
1679 (bfinfdpic_hash_table (info)->relocs_info)
1680 #define bfinfdpic_got_initial_offset(info) \
1681 (bfinfdpic_hash_table (info)->got0)
1682 #define bfinfdpic_plt_initial_offset(info) \
1683 (bfinfdpic_hash_table (info)->plt0)
1684 #define bfinfdpic_dynamic_got_plt_info(info) \
1685 (bfinfdpic_hash_table (info)->g)
1686
1687 /* The name of the dynamic interpreter. This is put in the .interp
1688 section. */
1689
1690 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1691
1692 #define DEFAULT_STACK_SIZE 0x20000
1693
1694 /* This structure is used to collect the number of entries present in
1695 each addressable range of the got. */
1696 struct _bfinfdpic_dynamic_got_info
1697 {
1698 /* Several bits of information about the current link. */
1699 struct bfd_link_info *info;
1700 /* Total size needed for GOT entries within the 18- or 32-bit
1701 ranges. */
1702 bfd_vma got17m4, gothilo;
1703 /* Total size needed for function descriptor entries within the 18-
1704 or 32-bit ranges. */
1705 bfd_vma fd17m4, fdhilo;
1706 /* Total size needed function descriptor entries referenced in PLT
1707 entries, that would be profitable to place in offsets close to
1708 the PIC register. */
1709 bfd_vma fdplt;
1710 /* Total size needed by lazy PLT entries. */
1711 bfd_vma lzplt;
1712 /* Number of relocations carried over from input object files. */
1713 unsigned long relocs;
1714 /* Number of fixups introduced by relocations in input object files. */
1715 unsigned long fixups;
1716 };
1717
1718 /* Create a Blackfin ELF linker hash table. */
1719
1720 static struct bfd_link_hash_table *
1721 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1722 {
1723 struct bfinfdpic_elf_link_hash_table *ret;
1724 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1725
1726 ret = bfd_zmalloc (amt);
1727 if (ret == NULL)
1728 return NULL;
1729
1730 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1731 _bfd_elf_link_hash_newfunc,
1732 sizeof (struct elf_link_hash_entry),
1733 BFIN_ELF_DATA))
1734 {
1735 free (ret);
1736 return NULL;
1737 }
1738
1739 return &ret->elf.root;
1740 }
1741
1742 /* Decide whether a reference to a symbol can be resolved locally or
1743 not. If the symbol is protected, we want the local address, but
1744 its function descriptor must be assigned by the dynamic linker. */
1745 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1746 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1747 || ! elf_hash_table (INFO)->dynamic_sections_created)
1748 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1749 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1750
1751 /* This structure collects information on what kind of GOT, PLT or
1752 function descriptors are required by relocations that reference a
1753 certain symbol. */
1754 struct bfinfdpic_relocs_info
1755 {
1756 /* The index of the symbol, as stored in the relocation r_info, if
1757 we have a local symbol; -1 otherwise. */
1758 long symndx;
1759 union
1760 {
1761 /* The input bfd in which the symbol is defined, if it's a local
1762 symbol. */
1763 bfd *abfd;
1764 /* If symndx == -1, the hash table entry corresponding to a global
1765 symbol (even if it turns out to bind locally, in which case it
1766 should ideally be replaced with section's symndx + addend). */
1767 struct elf_link_hash_entry *h;
1768 } d;
1769 /* The addend of the relocation that references the symbol. */
1770 bfd_vma addend;
1771
1772 /* The fields above are used to identify an entry. The fields below
1773 contain information on how an entry is used and, later on, which
1774 locations it was assigned. */
1775 /* The following 2 fields record whether the symbol+addend above was
1776 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1777 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1778 unsigned got17m4;
1779 unsigned gothilo;
1780 /* Whether a FUNCDESC relocation references symbol+addend. */
1781 unsigned fd;
1782 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1783 unsigned fdgot17m4;
1784 unsigned fdgothilo;
1785 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1786 unsigned fdgoff17m4;
1787 unsigned fdgoffhilo;
1788 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1789 GOTOFFHI relocations. The addend doesn't really matter, since we
1790 envision that this will only be used to check whether the symbol
1791 is mapped to the same segment as the got. */
1792 unsigned gotoff;
1793 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1794 unsigned call;
1795 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1796 relocation. */
1797 unsigned sym;
1798 /* Whether we need a PLT entry for a symbol. Should be implied by
1799 something like:
1800 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1801 unsigned plt:1;
1802 /* Whether a function descriptor should be created in this link unit
1803 for symbol+addend. Should be implied by something like:
1804 (plt || fdgotoff17m4 || fdgotofflohi
1805 || ((fd || fdgot17m4 || fdgothilo)
1806 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1807 unsigned privfd:1;
1808 /* Whether a lazy PLT entry is needed for this symbol+addend.
1809 Should be implied by something like:
1810 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1811 && ! (info->flags & DF_BIND_NOW)) */
1812 unsigned lazyplt:1;
1813 /* Whether we've already emitted GOT relocations and PLT entries as
1814 needed for this symbol. */
1815 unsigned done:1;
1816
1817 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1818 relocations referencing the symbol. */
1819 unsigned relocs32, relocsfd, relocsfdv;
1820
1821 /* The number of .rofixups entries and dynamic relocations allocated
1822 for this symbol, minus any that might have already been used. */
1823 unsigned fixups, dynrelocs;
1824
1825 /* The offsets of the GOT entries assigned to symbol+addend, to the
1826 function descriptor's address, and to a function descriptor,
1827 respectively. Should be zero if unassigned. The offsets are
1828 counted from the value that will be assigned to the PIC register,
1829 not from the beginning of the .got section. */
1830 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1831 /* The offsets of the PLT entries assigned to symbol+addend,
1832 non-lazy and lazy, respectively. If unassigned, should be
1833 (bfd_vma)-1. */
1834 bfd_vma plt_entry, lzplt_entry;
1835 };
1836
1837 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1838 static hashval_t
1839 bfinfdpic_relocs_info_hash (const void *entry_)
1840 {
1841 const struct bfinfdpic_relocs_info *entry = entry_;
1842
1843 return (entry->symndx == -1
1844 ? (long) entry->d.h->root.root.hash
1845 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1846 }
1847
1848 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1849 identical. */
1850 static int
1851 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1852 {
1853 const struct bfinfdpic_relocs_info *e1 = entry1;
1854 const struct bfinfdpic_relocs_info *e2 = entry2;
1855
1856 return e1->symndx == e2->symndx && e1->addend == e2->addend
1857 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1858 }
1859
1860 /* Find or create an entry in a hash table HT that matches the key
1861 fields of the given ENTRY. If it's not found, memory for a new
1862 entry is allocated in ABFD's obstack. */
1863 static struct bfinfdpic_relocs_info *
1864 bfinfdpic_relocs_info_find (struct htab *ht,
1865 bfd *abfd,
1866 const struct bfinfdpic_relocs_info *entry,
1867 enum insert_option insert)
1868 {
1869 struct bfinfdpic_relocs_info **loc;
1870
1871 if (!ht)
1872 return NULL;
1873
1874 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1875
1876 if (! loc)
1877 return NULL;
1878
1879 if (*loc)
1880 return *loc;
1881
1882 *loc = bfd_zalloc (abfd, sizeof (**loc));
1883
1884 if (! *loc)
1885 return *loc;
1886
1887 (*loc)->symndx = entry->symndx;
1888 (*loc)->d = entry->d;
1889 (*loc)->addend = entry->addend;
1890 (*loc)->plt_entry = (bfd_vma)-1;
1891 (*loc)->lzplt_entry = (bfd_vma)-1;
1892
1893 return *loc;
1894 }
1895
1896 /* Obtain the address of the entry in HT associated with H's symbol +
1897 addend, creating a new entry if none existed. ABFD is only used
1898 for memory allocation purposes. */
1899 inline static struct bfinfdpic_relocs_info *
1900 bfinfdpic_relocs_info_for_global (struct htab *ht,
1901 bfd *abfd,
1902 struct elf_link_hash_entry *h,
1903 bfd_vma addend,
1904 enum insert_option insert)
1905 {
1906 struct bfinfdpic_relocs_info entry;
1907
1908 entry.symndx = -1;
1909 entry.d.h = h;
1910 entry.addend = addend;
1911
1912 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1913 }
1914
1915 /* Obtain the address of the entry in HT associated with the SYMNDXth
1916 local symbol of the input bfd ABFD, plus the addend, creating a new
1917 entry if none existed. */
1918 inline static struct bfinfdpic_relocs_info *
1919 bfinfdpic_relocs_info_for_local (struct htab *ht,
1920 bfd *abfd,
1921 long symndx,
1922 bfd_vma addend,
1923 enum insert_option insert)
1924 {
1925 struct bfinfdpic_relocs_info entry;
1926
1927 entry.symndx = symndx;
1928 entry.d.abfd = abfd;
1929 entry.addend = addend;
1930
1931 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1932 }
1933
1934 /* Merge fields set by check_relocs() of two entries that end up being
1935 mapped to the same (presumably global) symbol. */
1936
1937 inline static void
1938 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
1939 struct bfinfdpic_relocs_info const *e1)
1940 {
1941 e2->got17m4 |= e1->got17m4;
1942 e2->gothilo |= e1->gothilo;
1943 e2->fd |= e1->fd;
1944 e2->fdgot17m4 |= e1->fdgot17m4;
1945 e2->fdgothilo |= e1->fdgothilo;
1946 e2->fdgoff17m4 |= e1->fdgoff17m4;
1947 e2->fdgoffhilo |= e1->fdgoffhilo;
1948 e2->gotoff |= e1->gotoff;
1949 e2->call |= e1->call;
1950 e2->sym |= e1->sym;
1951 }
1952
1953 /* Every block of 65535 lazy PLT entries shares a single call to the
1954 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1955 32767, counting from 0). All other lazy PLT entries branch to it
1956 in a single instruction. */
1957
1958 #define LZPLT_RESOLVER_EXTRA 10
1959 #define LZPLT_NORMAL_SIZE 6
1960 #define LZPLT_ENTRIES 1362
1961
1962 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1963 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1964
1965 /* Add a dynamic relocation to the SRELOC section. */
1966
1967 inline static bfd_vma
1968 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
1969 int reloc_type, long dynindx, bfd_vma addend,
1970 struct bfinfdpic_relocs_info *entry)
1971 {
1972 Elf_Internal_Rela outrel;
1973 bfd_vma reloc_offset;
1974
1975 outrel.r_offset = offset;
1976 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
1977 outrel.r_addend = addend;
1978
1979 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
1980 BFD_ASSERT (reloc_offset < sreloc->size);
1981 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1982 sreloc->contents + reloc_offset);
1983 sreloc->reloc_count++;
1984
1985 /* If the entry's index is zero, this relocation was probably to a
1986 linkonce section that got discarded. We reserved a dynamic
1987 relocation, but it was for another entry than the one we got at
1988 the time of emitting the relocation. Unfortunately there's no
1989 simple way for us to catch this situation, since the relocation
1990 is cleared right before calling relocate_section, at which point
1991 we no longer know what the relocation used to point to. */
1992 if (entry->symndx)
1993 {
1994 BFD_ASSERT (entry->dynrelocs > 0);
1995 entry->dynrelocs--;
1996 }
1997
1998 return reloc_offset;
1999 }
2000
2001 /* Add a fixup to the ROFIXUP section. */
2002
2003 static bfd_vma
2004 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2005 struct bfinfdpic_relocs_info *entry)
2006 {
2007 bfd_vma fixup_offset;
2008
2009 if (rofixup->flags & SEC_EXCLUDE)
2010 return -1;
2011
2012 fixup_offset = rofixup->reloc_count * 4;
2013 if (rofixup->contents)
2014 {
2015 BFD_ASSERT (fixup_offset < rofixup->size);
2016 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2017 }
2018 rofixup->reloc_count++;
2019
2020 if (entry && entry->symndx)
2021 {
2022 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2023 above. */
2024 BFD_ASSERT (entry->fixups > 0);
2025 entry->fixups--;
2026 }
2027
2028 return fixup_offset;
2029 }
2030
2031 /* Find the segment number in which OSEC, and output section, is
2032 located. */
2033
2034 static unsigned
2035 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2036 {
2037 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2038
2039 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2040 }
2041
2042 inline static bfd_boolean
2043 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2044 {
2045 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2046
2047 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2048 }
2049
2050 /* Generate relocations for GOT entries, function descriptors, and
2051 code for PLT and lazy PLT entries. */
2052
2053 inline static bfd_boolean
2054 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2055 bfd *output_bfd,
2056 struct bfd_link_info *info,
2057 asection *sec,
2058 Elf_Internal_Sym *sym,
2059 bfd_vma addend)
2060 {
2061 bfd_vma fd_lazy_rel_offset = (bfd_vma) -1;
2062 int dynindx = -1;
2063
2064 if (entry->done)
2065 return TRUE;
2066 entry->done = 1;
2067
2068 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2069 {
2070 /* If the symbol is dynamic, consider it for dynamic
2071 relocations, otherwise decay to section + offset. */
2072 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2073 dynindx = entry->d.h->dynindx;
2074 else
2075 {
2076 if (sec
2077 && sec->output_section
2078 && ! bfd_is_abs_section (sec->output_section)
2079 && ! bfd_is_und_section (sec->output_section))
2080 dynindx = elf_section_data (sec->output_section)->dynindx;
2081 else
2082 dynindx = 0;
2083 }
2084 }
2085
2086 /* Generate relocation for GOT entry pointing to the symbol. */
2087 if (entry->got_entry)
2088 {
2089 int idx = dynindx;
2090 bfd_vma ad = addend;
2091
2092 /* If the symbol is dynamic but binds locally, use
2093 section+offset. */
2094 if (sec && (entry->symndx != -1
2095 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2096 {
2097 if (entry->symndx == -1)
2098 ad += entry->d.h->root.u.def.value;
2099 else
2100 ad += sym->st_value;
2101 ad += sec->output_offset;
2102 if (sec->output_section && elf_section_data (sec->output_section))
2103 idx = elf_section_data (sec->output_section)->dynindx;
2104 else
2105 idx = 0;
2106 }
2107
2108 /* If we're linking an executable at a fixed address, we can
2109 omit the dynamic relocation as long as the symbol is local to
2110 this module. */
2111 if (bfd_link_pde (info)
2112 && (entry->symndx != -1
2113 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2114 {
2115 if (sec)
2116 ad += sec->output_section->vma;
2117 if (entry->symndx != -1
2118 || entry->d.h->root.type != bfd_link_hash_undefweak)
2119 _bfinfdpic_add_rofixup (output_bfd,
2120 bfinfdpic_gotfixup_section (info),
2121 bfinfdpic_got_section (info)->output_section
2122 ->vma
2123 + bfinfdpic_got_section (info)->output_offset
2124 + bfinfdpic_got_initial_offset (info)
2125 + entry->got_entry, entry);
2126 }
2127 else
2128 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2129 _bfd_elf_section_offset
2130 (output_bfd, info,
2131 bfinfdpic_got_section (info),
2132 bfinfdpic_got_initial_offset (info)
2133 + entry->got_entry)
2134 + bfinfdpic_got_section (info)
2135 ->output_section->vma
2136 + bfinfdpic_got_section (info)->output_offset,
2137 R_BFIN_BYTE4_DATA, idx, ad, entry);
2138
2139 bfd_put_32 (output_bfd, ad,
2140 bfinfdpic_got_section (info)->contents
2141 + bfinfdpic_got_initial_offset (info)
2142 + entry->got_entry);
2143 }
2144
2145 /* Generate relocation for GOT entry pointing to a canonical
2146 function descriptor. */
2147 if (entry->fdgot_entry)
2148 {
2149 int reloc, idx;
2150 bfd_vma ad = 0;
2151
2152 if (! (entry->symndx == -1
2153 && entry->d.h->root.type == bfd_link_hash_undefweak
2154 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2155 {
2156 /* If the symbol is dynamic and there may be dynamic symbol
2157 resolution because we are, or are linked with, a shared
2158 library, emit a FUNCDESC relocation such that the dynamic
2159 linker will allocate the function descriptor. If the
2160 symbol needs a non-local function descriptor but binds
2161 locally (e.g., its visibility is protected, emit a
2162 dynamic relocation decayed to section+offset. */
2163 if (entry->symndx == -1
2164 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2165 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2166 && !bfd_link_pde (info))
2167 {
2168 reloc = R_BFIN_FUNCDESC;
2169 idx = elf_section_data (entry->d.h->root.u.def.section
2170 ->output_section)->dynindx;
2171 ad = entry->d.h->root.u.def.section->output_offset
2172 + entry->d.h->root.u.def.value;
2173 }
2174 else if (entry->symndx == -1
2175 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2176 {
2177 reloc = R_BFIN_FUNCDESC;
2178 idx = dynindx;
2179 ad = addend;
2180 if (ad)
2181 return FALSE;
2182 }
2183 else
2184 {
2185 /* Otherwise, we know we have a private function descriptor,
2186 so reference it directly. */
2187 if (elf_hash_table (info)->dynamic_sections_created)
2188 BFD_ASSERT (entry->privfd);
2189 reloc = R_BFIN_BYTE4_DATA;
2190 idx = elf_section_data (bfinfdpic_got_section (info)
2191 ->output_section)->dynindx;
2192 ad = bfinfdpic_got_section (info)->output_offset
2193 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2194 }
2195
2196 /* If there is room for dynamic symbol resolution, emit the
2197 dynamic relocation. However, if we're linking an
2198 executable at a fixed location, we won't have emitted a
2199 dynamic symbol entry for the got section, so idx will be
2200 zero, which means we can and should compute the address
2201 of the private descriptor ourselves. */
2202 if (bfd_link_pde (info)
2203 && (entry->symndx != -1
2204 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2205 {
2206 ad += bfinfdpic_got_section (info)->output_section->vma;
2207 _bfinfdpic_add_rofixup (output_bfd,
2208 bfinfdpic_gotfixup_section (info),
2209 bfinfdpic_got_section (info)
2210 ->output_section->vma
2211 + bfinfdpic_got_section (info)
2212 ->output_offset
2213 + bfinfdpic_got_initial_offset (info)
2214 + entry->fdgot_entry, entry);
2215 }
2216 else
2217 _bfinfdpic_add_dyn_reloc (output_bfd,
2218 bfinfdpic_gotrel_section (info),
2219 _bfd_elf_section_offset
2220 (output_bfd, info,
2221 bfinfdpic_got_section (info),
2222 bfinfdpic_got_initial_offset (info)
2223 + entry->fdgot_entry)
2224 + bfinfdpic_got_section (info)
2225 ->output_section->vma
2226 + bfinfdpic_got_section (info)
2227 ->output_offset,
2228 reloc, idx, ad, entry);
2229 }
2230
2231 bfd_put_32 (output_bfd, ad,
2232 bfinfdpic_got_section (info)->contents
2233 + bfinfdpic_got_initial_offset (info)
2234 + entry->fdgot_entry);
2235 }
2236
2237 /* Generate relocation to fill in a private function descriptor in
2238 the GOT. */
2239 if (entry->fd_entry)
2240 {
2241 int idx = dynindx;
2242 bfd_vma ad = addend;
2243 bfd_vma ofst;
2244 long lowword, highword;
2245
2246 /* If the symbol is dynamic but binds locally, use
2247 section+offset. */
2248 if (sec && (entry->symndx != -1
2249 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2250 {
2251 if (entry->symndx == -1)
2252 ad += entry->d.h->root.u.def.value;
2253 else
2254 ad += sym->st_value;
2255 ad += sec->output_offset;
2256 if (sec->output_section && elf_section_data (sec->output_section))
2257 idx = elf_section_data (sec->output_section)->dynindx;
2258 else
2259 idx = 0;
2260 }
2261
2262 /* If we're linking an executable at a fixed address, we can
2263 omit the dynamic relocation as long as the symbol is local to
2264 this module. */
2265 if (bfd_link_pde (info)
2266 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2267 {
2268 if (sec)
2269 ad += sec->output_section->vma;
2270 ofst = 0;
2271 if (entry->symndx != -1
2272 || entry->d.h->root.type != bfd_link_hash_undefweak)
2273 {
2274 _bfinfdpic_add_rofixup (output_bfd,
2275 bfinfdpic_gotfixup_section (info),
2276 bfinfdpic_got_section (info)
2277 ->output_section->vma
2278 + bfinfdpic_got_section (info)
2279 ->output_offset
2280 + bfinfdpic_got_initial_offset (info)
2281 + entry->fd_entry, entry);
2282 _bfinfdpic_add_rofixup (output_bfd,
2283 bfinfdpic_gotfixup_section (info),
2284 bfinfdpic_got_section (info)
2285 ->output_section->vma
2286 + bfinfdpic_got_section (info)
2287 ->output_offset
2288 + bfinfdpic_got_initial_offset (info)
2289 + entry->fd_entry + 4, entry);
2290 }
2291 }
2292 else
2293 {
2294 ofst
2295 = _bfinfdpic_add_dyn_reloc (output_bfd,
2296 entry->lazyplt
2297 ? bfinfdpic_pltrel_section (info)
2298 : bfinfdpic_gotrel_section (info),
2299 _bfd_elf_section_offset
2300 (output_bfd, info,
2301 bfinfdpic_got_section (info),
2302 bfinfdpic_got_initial_offset (info)
2303 + entry->fd_entry)
2304 + bfinfdpic_got_section (info)
2305 ->output_section->vma
2306 + bfinfdpic_got_section (info)
2307 ->output_offset,
2308 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2309 }
2310
2311 /* If we've omitted the dynamic relocation, just emit the fixed
2312 addresses of the symbol and of the local GOT base offset. */
2313 if (bfd_link_pde (info)
2314 && sec
2315 && sec->output_section)
2316 {
2317 lowword = ad;
2318 highword = bfinfdpic_got_section (info)->output_section->vma
2319 + bfinfdpic_got_section (info)->output_offset
2320 + bfinfdpic_got_initial_offset (info);
2321 }
2322 else if (entry->lazyplt)
2323 {
2324 if (ad)
2325 return FALSE;
2326
2327 fd_lazy_rel_offset = ofst;
2328
2329 /* A function descriptor used for lazy or local resolving is
2330 initialized such that its high word contains the output
2331 section index in which the PLT entries are located, and
2332 the low word contains the address of the lazy PLT entry
2333 entry point, that must be within the memory region
2334 assigned to that section. */
2335 lowword = entry->lzplt_entry + 4
2336 + bfinfdpic_plt_section (info)->output_offset
2337 + bfinfdpic_plt_section (info)->output_section->vma;
2338 highword = _bfinfdpic_osec_to_segment
2339 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2340 }
2341 else
2342 {
2343 /* A function descriptor for a local function gets the index
2344 of the section. For a non-local function, it's
2345 disregarded. */
2346 lowword = ad;
2347 if (sec == NULL
2348 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2349 && entry->d.h->dynindx == idx))
2350 highword = 0;
2351 else
2352 highword = _bfinfdpic_osec_to_segment
2353 (output_bfd, sec->output_section);
2354 }
2355
2356 bfd_put_32 (output_bfd, lowword,
2357 bfinfdpic_got_section (info)->contents
2358 + bfinfdpic_got_initial_offset (info)
2359 + entry->fd_entry);
2360 bfd_put_32 (output_bfd, highword,
2361 bfinfdpic_got_section (info)->contents
2362 + bfinfdpic_got_initial_offset (info)
2363 + entry->fd_entry + 4);
2364 }
2365
2366 /* Generate code for the PLT entry. */
2367 if (entry->plt_entry != (bfd_vma) -1)
2368 {
2369 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2370 + entry->plt_entry;
2371
2372 BFD_ASSERT (entry->fd_entry);
2373
2374 /* Figure out what kind of PLT entry we need, depending on the
2375 location of the function descriptor within the GOT. */
2376 if (entry->fd_entry >= -(1 << (18 - 1))
2377 && entry->fd_entry + 4 < (1 << (18 - 1)))
2378 {
2379 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2380 bfd_put_32 (output_bfd,
2381 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2382 plt_code);
2383 bfd_put_32 (output_bfd,
2384 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2385 plt_code + 4);
2386 plt_code += 8;
2387 }
2388 else
2389 {
2390 /* P1.L = fd_entry; P1.H = fd_entry;
2391 P3 = P3 + P1;
2392 P1 = [P3];
2393 P3 = [P3 + 4]; */
2394 bfd_put_32 (output_bfd,
2395 0xe109 | (entry->fd_entry << 16),
2396 plt_code);
2397 bfd_put_32 (output_bfd,
2398 0xe149 | (entry->fd_entry & 0xFFFF0000),
2399 plt_code + 4);
2400 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2401 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2402 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2403 plt_code += 14;
2404 }
2405 /* JUMP (P1) */
2406 bfd_put_16 (output_bfd, 0x0051, plt_code);
2407 }
2408
2409 /* Generate code for the lazy PLT entry. */
2410 if (entry->lzplt_entry != (bfd_vma) -1)
2411 {
2412 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2413 + entry->lzplt_entry;
2414 bfd_vma resolverStub_addr;
2415
2416 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2417 lzplt_code += 4;
2418
2419 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2420 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2421 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2422 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2423
2424 if (entry->lzplt_entry == resolverStub_addr)
2425 {
2426 /* This is a lazy PLT entry that includes a resolver call.
2427 P2 = [P3];
2428 R3 = [P3 + 4];
2429 JUMP (P2); */
2430 bfd_put_32 (output_bfd,
2431 0xa05b915a,
2432 lzplt_code);
2433 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2434 }
2435 else
2436 {
2437 /* JUMP.S resolverStub */
2438 bfd_put_16 (output_bfd,
2439 0x2000
2440 | (((resolverStub_addr - entry->lzplt_entry)
2441 / 2) & (((bfd_vma)1 << 12) - 1)),
2442 lzplt_code);
2443 }
2444 }
2445
2446 return TRUE;
2447 }
2448 \f
2449 /* Relocate an Blackfin ELF section.
2450
2451 The RELOCATE_SECTION function is called by the new ELF backend linker
2452 to handle the relocations for a section.
2453
2454 The relocs are always passed as Rela structures; if the section
2455 actually uses Rel structures, the r_addend field will always be
2456 zero.
2457
2458 This function is responsible for adjusting the section contents as
2459 necessary, and (if using Rela relocs and generating a relocatable
2460 output file) adjusting the reloc addend as necessary.
2461
2462 This function does not have to worry about setting the reloc
2463 address or the reloc symbol index.
2464
2465 LOCAL_SYMS is a pointer to the swapped in local symbols.
2466
2467 LOCAL_SECTIONS is an array giving the section in the input file
2468 corresponding to the st_shndx field of each local symbol.
2469
2470 The global hash table entry for the global symbols can be found
2471 via elf_sym_hashes (input_bfd).
2472
2473 When generating relocatable output, this function must handle
2474 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2475 going to be the section symbol corresponding to the output
2476 section, which means that the addend must be adjusted
2477 accordingly. */
2478
2479 static bfd_boolean
2480 bfinfdpic_relocate_section (bfd * output_bfd,
2481 struct bfd_link_info *info,
2482 bfd * input_bfd,
2483 asection * input_section,
2484 bfd_byte * contents,
2485 Elf_Internal_Rela * relocs,
2486 Elf_Internal_Sym * local_syms,
2487 asection ** local_sections)
2488 {
2489 Elf_Internal_Shdr *symtab_hdr;
2490 struct elf_link_hash_entry **sym_hashes;
2491 Elf_Internal_Rela *rel;
2492 Elf_Internal_Rela *relend;
2493 unsigned isec_segment, got_segment, plt_segment,
2494 check_segment[2];
2495 int silence_segment_error = !bfd_link_pic (info);
2496
2497 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2498 sym_hashes = elf_sym_hashes (input_bfd);
2499 relend = relocs + input_section->reloc_count;
2500
2501 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2502 input_section->output_section);
2503 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2504 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2505 bfinfdpic_got_section (info)
2506 ->output_section);
2507 else
2508 got_segment = -1;
2509 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2510 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2511 bfinfdpic_plt_section (info)
2512 ->output_section);
2513 else
2514 plt_segment = -1;
2515
2516 for (rel = relocs; rel < relend; rel ++)
2517 {
2518 reloc_howto_type *howto;
2519 unsigned long r_symndx;
2520 Elf_Internal_Sym *sym;
2521 asection *sec;
2522 struct elf_link_hash_entry *h;
2523 bfd_vma relocation;
2524 bfd_reloc_status_type r;
2525 const char * name = NULL;
2526 int r_type;
2527 asection *osec;
2528 struct bfinfdpic_relocs_info *picrel;
2529 bfd_vma orig_addend = rel->r_addend;
2530
2531 r_type = ELF32_R_TYPE (rel->r_info);
2532
2533 if (r_type == R_BFIN_GNU_VTINHERIT
2534 || r_type == R_BFIN_GNU_VTENTRY)
2535 continue;
2536
2537 r_symndx = ELF32_R_SYM (rel->r_info);
2538 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2539 if (howto == NULL)
2540 {
2541 bfd_set_error (bfd_error_bad_value);
2542 return FALSE;
2543 }
2544
2545 h = NULL;
2546 sym = NULL;
2547 sec = NULL;
2548
2549 if (r_symndx < symtab_hdr->sh_info)
2550 {
2551 sym = local_syms + r_symndx;
2552 osec = sec = local_sections [r_symndx];
2553 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2554
2555 name = bfd_elf_string_from_elf_section
2556 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2557 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2558 }
2559 else
2560 {
2561 bfd_boolean warned, ignored;
2562 bfd_boolean unresolved_reloc;
2563
2564 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2565 r_symndx, symtab_hdr, sym_hashes,
2566 h, sec, relocation,
2567 unresolved_reloc, warned, ignored);
2568 osec = sec;
2569 }
2570
2571 if (sec != NULL && discarded_section (sec))
2572 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2573 rel, 1, relend, howto, 0, contents);
2574
2575 if (bfd_link_relocatable (info))
2576 continue;
2577
2578 if (h != NULL
2579 && (h->root.type == bfd_link_hash_defined
2580 || h->root.type == bfd_link_hash_defweak)
2581 && !BFINFDPIC_SYM_LOCAL (info, h))
2582 {
2583 osec = sec = NULL;
2584 relocation = 0;
2585 }
2586
2587 switch (r_type)
2588 {
2589 case R_BFIN_PCREL24:
2590 case R_BFIN_PCREL24_JUMP_L:
2591 case R_BFIN_BYTE4_DATA:
2592 if (! IS_FDPIC (output_bfd))
2593 goto non_fdpic;
2594 /* Fall through. */
2595
2596 case R_BFIN_GOT17M4:
2597 case R_BFIN_GOTHI:
2598 case R_BFIN_GOTLO:
2599 case R_BFIN_FUNCDESC_GOT17M4:
2600 case R_BFIN_FUNCDESC_GOTHI:
2601 case R_BFIN_FUNCDESC_GOTLO:
2602 case R_BFIN_GOTOFF17M4:
2603 case R_BFIN_GOTOFFHI:
2604 case R_BFIN_GOTOFFLO:
2605 case R_BFIN_FUNCDESC_GOTOFF17M4:
2606 case R_BFIN_FUNCDESC_GOTOFFHI:
2607 case R_BFIN_FUNCDESC_GOTOFFLO:
2608 case R_BFIN_FUNCDESC:
2609 case R_BFIN_FUNCDESC_VALUE:
2610 if (h != NULL)
2611 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2612 (info), input_bfd, h,
2613 orig_addend, INSERT);
2614 else
2615 /* In order to find the entry we created before, we must
2616 use the original addend, not the one that may have been
2617 modified by _bfd_elf_rela_local_sym(). */
2618 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2619 (info), input_bfd, r_symndx,
2620 orig_addend, INSERT);
2621 if (! picrel)
2622 return FALSE;
2623
2624 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2625 osec, sym,
2626 rel->r_addend))
2627 {
2628 _bfd_error_handler
2629 /* xgettext:c-format */
2630 (_("%pB: relocation at `%pA+%#" PRIx64 "' "
2631 "references symbol `%s' with nonzero addend"),
2632 input_bfd, input_section, (uint64_t) rel->r_offset, name);
2633 return FALSE;
2634
2635 }
2636
2637 break;
2638
2639 default:
2640 non_fdpic:
2641 picrel = NULL;
2642 if (h && ! BFINFDPIC_SYM_LOCAL (info, h)
2643 && _bfd_elf_section_offset (output_bfd, info, input_section,
2644 rel->r_offset) != (bfd_vma) -1)
2645 {
2646 info->callbacks->warning
2647 (info, _("relocation references symbol not defined in the module"),
2648 name, input_bfd, input_section, rel->r_offset);
2649 return FALSE;
2650 }
2651 break;
2652 }
2653
2654 switch (r_type)
2655 {
2656 case R_BFIN_PCREL24:
2657 case R_BFIN_PCREL24_JUMP_L:
2658 check_segment[0] = isec_segment;
2659 if (! IS_FDPIC (output_bfd))
2660 check_segment[1] = isec_segment;
2661 else if (picrel->plt)
2662 {
2663 relocation = bfinfdpic_plt_section (info)->output_section->vma
2664 + bfinfdpic_plt_section (info)->output_offset
2665 + picrel->plt_entry;
2666 check_segment[1] = plt_segment;
2667 }
2668 /* We don't want to warn on calls to undefined weak symbols,
2669 as calls to them must be protected by non-NULL tests
2670 anyway, and unprotected calls would invoke undefined
2671 behavior. */
2672 else if (picrel->symndx == -1
2673 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2674 check_segment[1] = check_segment[0];
2675 else
2676 check_segment[1] = sec
2677 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2678 : (unsigned)-1;
2679 break;
2680
2681 case R_BFIN_GOT17M4:
2682 case R_BFIN_GOTHI:
2683 case R_BFIN_GOTLO:
2684 relocation = picrel->got_entry;
2685 check_segment[0] = check_segment[1] = got_segment;
2686 break;
2687
2688 case R_BFIN_FUNCDESC_GOT17M4:
2689 case R_BFIN_FUNCDESC_GOTHI:
2690 case R_BFIN_FUNCDESC_GOTLO:
2691 relocation = picrel->fdgot_entry;
2692 check_segment[0] = check_segment[1] = got_segment;
2693 break;
2694
2695 case R_BFIN_GOTOFFHI:
2696 case R_BFIN_GOTOFF17M4:
2697 case R_BFIN_GOTOFFLO:
2698 relocation -= bfinfdpic_got_section (info)->output_section->vma
2699 + bfinfdpic_got_section (info)->output_offset
2700 + bfinfdpic_got_initial_offset (info);
2701 check_segment[0] = got_segment;
2702 check_segment[1] = sec
2703 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2704 : (unsigned)-1;
2705 break;
2706
2707 case R_BFIN_FUNCDESC_GOTOFF17M4:
2708 case R_BFIN_FUNCDESC_GOTOFFHI:
2709 case R_BFIN_FUNCDESC_GOTOFFLO:
2710 relocation = picrel->fd_entry;
2711 check_segment[0] = check_segment[1] = got_segment;
2712 break;
2713
2714 case R_BFIN_FUNCDESC:
2715 {
2716 int dynindx;
2717 bfd_vma addend = rel->r_addend;
2718
2719 if (! (h && h->root.type == bfd_link_hash_undefweak
2720 && BFINFDPIC_SYM_LOCAL (info, h)))
2721 {
2722 /* If the symbol is dynamic and there may be dynamic
2723 symbol resolution because we are or are linked with a
2724 shared library, emit a FUNCDESC relocation such that
2725 the dynamic linker will allocate the function
2726 descriptor. If the symbol needs a non-local function
2727 descriptor but binds locally (e.g., its visibility is
2728 protected, emit a dynamic relocation decayed to
2729 section+offset. */
2730 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2731 && BFINFDPIC_SYM_LOCAL (info, h)
2732 && !bfd_link_pde (info))
2733 {
2734 dynindx = elf_section_data (h->root.u.def.section
2735 ->output_section)->dynindx;
2736 addend += h->root.u.def.section->output_offset
2737 + h->root.u.def.value;
2738 }
2739 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2740 {
2741 if (addend)
2742 {
2743 info->callbacks->warning
2744 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2745 name, input_bfd, input_section, rel->r_offset);
2746 return FALSE;
2747 }
2748 dynindx = h->dynindx;
2749 }
2750 else
2751 {
2752 /* Otherwise, we know we have a private function
2753 descriptor, so reference it directly. */
2754 BFD_ASSERT (picrel->privfd);
2755 r_type = R_BFIN_BYTE4_DATA;
2756 dynindx = elf_section_data (bfinfdpic_got_section (info)
2757 ->output_section)->dynindx;
2758 addend = bfinfdpic_got_section (info)->output_offset
2759 + bfinfdpic_got_initial_offset (info)
2760 + picrel->fd_entry;
2761 }
2762
2763 /* If there is room for dynamic symbol resolution, emit
2764 the dynamic relocation. However, if we're linking an
2765 executable at a fixed location, we won't have emitted a
2766 dynamic symbol entry for the got section, so idx will
2767 be zero, which means we can and should compute the
2768 address of the private descriptor ourselves. */
2769 if (bfd_link_pde (info)
2770 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2771 {
2772 bfd_vma offset;
2773
2774 addend += bfinfdpic_got_section (info)->output_section->vma;
2775 if ((bfd_get_section_flags (output_bfd,
2776 input_section->output_section)
2777 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2778 {
2779 if (_bfinfdpic_osec_readonly_p (output_bfd,
2780 input_section
2781 ->output_section))
2782 {
2783 info->callbacks->warning
2784 (info,
2785 _("cannot emit fixups in read-only section"),
2786 name, input_bfd, input_section, rel->r_offset);
2787 return FALSE;
2788 }
2789
2790 offset = _bfd_elf_section_offset
2791 (output_bfd, info,
2792 input_section, rel->r_offset);
2793
2794 if (offset != (bfd_vma)-1)
2795 _bfinfdpic_add_rofixup (output_bfd,
2796 bfinfdpic_gotfixup_section
2797 (info),
2798 offset + input_section
2799 ->output_section->vma
2800 + input_section->output_offset,
2801 picrel);
2802 }
2803 }
2804 else if ((bfd_get_section_flags (output_bfd,
2805 input_section->output_section)
2806 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2807 {
2808 bfd_vma offset;
2809
2810 if (_bfinfdpic_osec_readonly_p (output_bfd,
2811 input_section
2812 ->output_section))
2813 {
2814 info->callbacks->warning
2815 (info,
2816 _("cannot emit dynamic relocations in read-only section"),
2817 name, input_bfd, input_section, rel->r_offset);
2818 return FALSE;
2819 }
2820 offset = _bfd_elf_section_offset (output_bfd, info,
2821 input_section, rel->r_offset);
2822
2823 if (offset != (bfd_vma)-1)
2824 _bfinfdpic_add_dyn_reloc (output_bfd,
2825 bfinfdpic_gotrel_section (info),
2826 offset + input_section
2827 ->output_section->vma
2828 + input_section->output_offset,
2829 r_type,
2830 dynindx, addend, picrel);
2831 }
2832 else
2833 addend += bfinfdpic_got_section (info)->output_section->vma;
2834 }
2835
2836 /* We want the addend in-place because dynamic
2837 relocations are REL. Setting relocation to it should
2838 arrange for it to be installed. */
2839 relocation = addend - rel->r_addend;
2840 }
2841 check_segment[0] = check_segment[1] = got_segment;
2842 break;
2843
2844 case R_BFIN_BYTE4_DATA:
2845 if (! IS_FDPIC (output_bfd))
2846 {
2847 check_segment[0] = check_segment[1] = -1;
2848 break;
2849 }
2850 /* Fall through. */
2851 case R_BFIN_FUNCDESC_VALUE:
2852 {
2853 int dynindx;
2854 bfd_vma addend = rel->r_addend;
2855 bfd_vma offset;
2856 offset = _bfd_elf_section_offset (output_bfd, info,
2857 input_section, rel->r_offset);
2858
2859 /* If the symbol is dynamic but binds locally, use
2860 section+offset. */
2861 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2862 {
2863 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2864 {
2865 info->callbacks->warning
2866 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2867 name, input_bfd, input_section, rel->r_offset);
2868 return FALSE;
2869 }
2870 dynindx = h->dynindx;
2871 }
2872 else
2873 {
2874 if (h)
2875 addend += h->root.u.def.value;
2876 else
2877 addend += sym->st_value;
2878 if (osec)
2879 addend += osec->output_offset;
2880 if (osec && osec->output_section
2881 && ! bfd_is_abs_section (osec->output_section)
2882 && ! bfd_is_und_section (osec->output_section))
2883 dynindx = elf_section_data (osec->output_section)->dynindx;
2884 else
2885 dynindx = 0;
2886 }
2887
2888 /* If we're linking an executable at a fixed address, we
2889 can omit the dynamic relocation as long as the symbol
2890 is defined in the current link unit (which is implied
2891 by its output section not being NULL). */
2892 if (bfd_link_pde (info)
2893 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2894 {
2895 if (osec)
2896 addend += osec->output_section->vma;
2897 if (IS_FDPIC (input_bfd)
2898 && (bfd_get_section_flags (output_bfd,
2899 input_section->output_section)
2900 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2901 {
2902 if (_bfinfdpic_osec_readonly_p (output_bfd,
2903 input_section
2904 ->output_section))
2905 {
2906 info->callbacks->warning
2907 (info,
2908 _("cannot emit fixups in read-only section"),
2909 name, input_bfd, input_section, rel->r_offset);
2910 return FALSE;
2911 }
2912 if (!h || h->root.type != bfd_link_hash_undefweak)
2913 {
2914 if (offset != (bfd_vma)-1)
2915 {
2916 _bfinfdpic_add_rofixup (output_bfd,
2917 bfinfdpic_gotfixup_section
2918 (info),
2919 offset + input_section
2920 ->output_section->vma
2921 + input_section->output_offset,
2922 picrel);
2923
2924 if (r_type == R_BFIN_FUNCDESC_VALUE)
2925 _bfinfdpic_add_rofixup
2926 (output_bfd,
2927 bfinfdpic_gotfixup_section (info),
2928 offset + input_section->output_section->vma
2929 + input_section->output_offset + 4, picrel);
2930 }
2931 }
2932 }
2933 }
2934 else
2935 {
2936 if ((bfd_get_section_flags (output_bfd,
2937 input_section->output_section)
2938 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2939 {
2940 if (_bfinfdpic_osec_readonly_p (output_bfd,
2941 input_section
2942 ->output_section))
2943 {
2944 info->callbacks->warning
2945 (info,
2946 _("cannot emit dynamic relocations in read-only section"),
2947 name, input_bfd, input_section, rel->r_offset);
2948 return FALSE;
2949 }
2950
2951 if (offset != (bfd_vma)-1)
2952 _bfinfdpic_add_dyn_reloc (output_bfd,
2953 bfinfdpic_gotrel_section (info),
2954 offset
2955 + input_section->output_section->vma
2956 + input_section->output_offset,
2957 r_type, dynindx, addend, picrel);
2958 }
2959 else if (osec)
2960 addend += osec->output_section->vma;
2961 /* We want the addend in-place because dynamic
2962 relocations are REL. Setting relocation to it
2963 should arrange for it to be installed. */
2964 relocation = addend - rel->r_addend;
2965 }
2966
2967 if (r_type == R_BFIN_FUNCDESC_VALUE)
2968 {
2969 /* If we've omitted the dynamic relocation, just emit
2970 the fixed addresses of the symbol and of the local
2971 GOT base offset. */
2972 if (bfd_link_pde (info)
2973 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2974 bfd_put_32 (output_bfd,
2975 bfinfdpic_got_section (info)->output_section->vma
2976 + bfinfdpic_got_section (info)->output_offset
2977 + bfinfdpic_got_initial_offset (info),
2978 contents + rel->r_offset + 4);
2979 else
2980 /* A function descriptor used for lazy or local
2981 resolving is initialized such that its high word
2982 contains the output section index in which the
2983 PLT entries are located, and the low word
2984 contains the offset of the lazy PLT entry entry
2985 point into that section. */
2986 bfd_put_32 (output_bfd,
2987 h && ! BFINFDPIC_SYM_LOCAL (info, h)
2988 ? 0
2989 : _bfinfdpic_osec_to_segment (output_bfd,
2990 sec
2991 ->output_section),
2992 contents + rel->r_offset + 4);
2993 }
2994 }
2995 check_segment[0] = check_segment[1] = got_segment;
2996 break;
2997
2998 default:
2999 check_segment[0] = isec_segment;
3000 check_segment[1] = sec
3001 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3002 : (unsigned)-1;
3003 break;
3004 }
3005
3006 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3007 {
3008 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3009 in the ld testsuite. */
3010 /* This helps catch problems in GCC while we can't do more
3011 than static linking. The idea is to test whether the
3012 input file basename is crt0.o only once. */
3013 if (silence_segment_error == 1)
3014 silence_segment_error =
3015 (strlen (input_bfd->filename) == 6
3016 && filename_cmp (input_bfd->filename, "crt0.o") == 0)
3017 || (strlen (input_bfd->filename) > 6
3018 && filename_cmp (input_bfd->filename
3019 + strlen (input_bfd->filename) - 7,
3020 "/crt0.o") == 0)
3021 ? -1 : 0;
3022 #endif
3023 if (!silence_segment_error
3024 /* We don't want duplicate errors for undefined
3025 symbols. */
3026 && !(picrel && picrel->symndx == -1
3027 && picrel->d.h->root.type == bfd_link_hash_undefined))
3028 info->callbacks->warning
3029 (info,
3030 bfd_link_pic (info)
3031 ? _("relocations between different segments are not supported")
3032 : _("warning: relocation references a different segment"),
3033 name, input_bfd, input_section, rel->r_offset);
3034 if (!silence_segment_error && bfd_link_pic (info))
3035 return FALSE;
3036 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3037 }
3038
3039 switch (r_type)
3040 {
3041 case R_BFIN_GOTOFFHI:
3042 /* We need the addend to be applied before we shift the
3043 value right. */
3044 relocation += rel->r_addend;
3045 /* Fall through. */
3046 case R_BFIN_GOTHI:
3047 case R_BFIN_FUNCDESC_GOTHI:
3048 case R_BFIN_FUNCDESC_GOTOFFHI:
3049 relocation >>= 16;
3050 /* Fall through. */
3051
3052 case R_BFIN_GOTLO:
3053 case R_BFIN_FUNCDESC_GOTLO:
3054 case R_BFIN_GOTOFFLO:
3055 case R_BFIN_FUNCDESC_GOTOFFLO:
3056 relocation &= 0xffff;
3057 break;
3058
3059 default:
3060 break;
3061 }
3062
3063 switch (r_type)
3064 {
3065 case R_BFIN_PCREL24:
3066 case R_BFIN_PCREL24_JUMP_L:
3067 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3068 break;
3069 /* Fall through. */
3070
3071 /* When referencing a GOT entry, a function descriptor or a
3072 PLT, we don't want the addend to apply to the reference,
3073 but rather to the referenced symbol. The actual entry
3074 will have already been created taking the addend into
3075 account, so cancel it out here. */
3076 case R_BFIN_GOT17M4:
3077 case R_BFIN_GOTHI:
3078 case R_BFIN_GOTLO:
3079 case R_BFIN_FUNCDESC_GOT17M4:
3080 case R_BFIN_FUNCDESC_GOTHI:
3081 case R_BFIN_FUNCDESC_GOTLO:
3082 case R_BFIN_FUNCDESC_GOTOFF17M4:
3083 case R_BFIN_FUNCDESC_GOTOFFHI:
3084 case R_BFIN_FUNCDESC_GOTOFFLO:
3085 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3086 here, since we do want to apply the addend to the others.
3087 Note that we've applied the addend to GOTOFFHI before we
3088 shifted it right. */
3089 case R_BFIN_GOTOFFHI:
3090 relocation -= rel->r_addend;
3091 break;
3092
3093 default:
3094 break;
3095 }
3096
3097 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3098 contents, rel->r_offset,
3099 relocation, rel->r_addend);
3100
3101 if (r != bfd_reloc_ok)
3102 {
3103 const char * msg = (const char *) NULL;
3104
3105 switch (r)
3106 {
3107 case bfd_reloc_overflow:
3108 (*info->callbacks->reloc_overflow)
3109 (info, (h ? &h->root : NULL), name, howto->name,
3110 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3111 break;
3112
3113 case bfd_reloc_undefined:
3114 (*info->callbacks->undefined_symbol)
3115 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3116 break;
3117
3118 case bfd_reloc_outofrange:
3119 msg = _("internal error: out of range error");
3120 break;
3121
3122 case bfd_reloc_notsupported:
3123 msg = _("internal error: unsupported relocation error");
3124 break;
3125
3126 case bfd_reloc_dangerous:
3127 msg = _("internal error: dangerous relocation");
3128 break;
3129
3130 default:
3131 msg = _("internal error: unknown error");
3132 break;
3133 }
3134
3135 if (msg)
3136 (*info->callbacks->warning) (info, msg, name, input_bfd,
3137 input_section, rel->r_offset);
3138 }
3139 }
3140
3141 return TRUE;
3142 }
3143
3144 /* We need dynamic symbols for every section, since segments can
3145 relocate independently. */
3146 static bfd_boolean
3147 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3148 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3149 asection *p)
3150 {
3151 switch (elf_section_data (p)->this_hdr.sh_type)
3152 {
3153 case SHT_PROGBITS:
3154 case SHT_NOBITS:
3155 /* If sh_type is yet undecided, assume it could be
3156 SHT_PROGBITS/SHT_NOBITS. */
3157 case SHT_NULL:
3158 return FALSE;
3159
3160 /* There shouldn't be section relative relocations
3161 against any other section. */
3162 default:
3163 return TRUE;
3164 }
3165 }
3166
3167 /* Create a .got section, as well as its additional info field. This
3168 is almost entirely copied from
3169 elflink.c:_bfd_elf_create_got_section(). */
3170
3171 static bfd_boolean
3172 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3173 {
3174 flagword flags, pltflags;
3175 asection *s;
3176 struct elf_link_hash_entry *h;
3177 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3178 int ptralign;
3179
3180 /* This function may be called more than once. */
3181 s = elf_hash_table (info)->sgot;
3182 if (s != NULL)
3183 return TRUE;
3184
3185 /* Machine specific: although pointers are 32-bits wide, we want the
3186 GOT to be aligned to a 64-bit boundary, such that function
3187 descriptors in it can be accessed with 64-bit loads and
3188 stores. */
3189 ptralign = 3;
3190
3191 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3192 | SEC_LINKER_CREATED);
3193 pltflags = flags;
3194
3195 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3196 elf_hash_table (info)->sgot = s;
3197 if (s == NULL
3198 || !bfd_set_section_alignment (abfd, s, ptralign))
3199 return FALSE;
3200
3201 if (bed->want_got_sym)
3202 {
3203 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3204 (or .got.plt) section. We don't do this in the linker script
3205 because we don't want to define the symbol if we are not creating
3206 a global offset table. */
3207 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3208 elf_hash_table (info)->hgot = h;
3209 if (h == NULL)
3210 return FALSE;
3211
3212 /* Machine-specific: we want the symbol for executables as
3213 well. */
3214 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3215 return FALSE;
3216 }
3217
3218 /* The first bit of the global offset table is the header. */
3219 s->size += bed->got_header_size;
3220
3221 /* This is the machine-specific part. Create and initialize section
3222 data for the got. */
3223 if (IS_FDPIC (abfd))
3224 {
3225 bfinfdpic_relocs_info (info) = htab_try_create (1,
3226 bfinfdpic_relocs_info_hash,
3227 bfinfdpic_relocs_info_eq,
3228 (htab_del) NULL);
3229 if (! bfinfdpic_relocs_info (info))
3230 return FALSE;
3231
3232 s = bfd_make_section_anyway_with_flags (abfd, ".rel.got",
3233 (flags | SEC_READONLY));
3234 if (s == NULL
3235 || ! bfd_set_section_alignment (abfd, s, 2))
3236 return FALSE;
3237
3238 bfinfdpic_gotrel_section (info) = s;
3239
3240 /* Machine-specific. */
3241 s = bfd_make_section_anyway_with_flags (abfd, ".rofixup",
3242 (flags | SEC_READONLY));
3243 if (s == NULL
3244 || ! bfd_set_section_alignment (abfd, s, 2))
3245 return FALSE;
3246
3247 bfinfdpic_gotfixup_section (info) = s;
3248 }
3249
3250 pltflags |= SEC_CODE;
3251 if (bed->plt_not_loaded)
3252 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3253 if (bed->plt_readonly)
3254 pltflags |= SEC_READONLY;
3255
3256 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
3257 if (s == NULL
3258 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3259 return FALSE;
3260 /* Blackfin-specific: remember it. */
3261 bfinfdpic_plt_section (info) = s;
3262
3263 if (bed->want_plt_sym)
3264 {
3265 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3266 .plt section. */
3267 struct bfd_link_hash_entry *bh = NULL;
3268
3269 if (! (_bfd_generic_link_add_one_symbol
3270 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3271 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3272 return FALSE;
3273 h = (struct elf_link_hash_entry *) bh;
3274 h->def_regular = 1;
3275 h->type = STT_OBJECT;
3276
3277 if (! bfd_link_executable (info)
3278 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3279 return FALSE;
3280 }
3281
3282 /* Blackfin-specific: we want rel relocations for the plt. */
3283 s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt",
3284 flags | SEC_READONLY);
3285 if (s == NULL
3286 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3287 return FALSE;
3288 /* Blackfin-specific: remember it. */
3289 bfinfdpic_pltrel_section (info) = s;
3290
3291 return TRUE;
3292 }
3293
3294 /* Make sure the got and plt sections exist, and that our pointers in
3295 the link hash table point to them. */
3296
3297 static bfd_boolean
3298 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3299 {
3300 /* This is mostly copied from
3301 elflink.c:_bfd_elf_create_dynamic_sections(). */
3302 flagword flags;
3303 asection *s;
3304 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3305
3306 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3307 | SEC_LINKER_CREATED);
3308
3309 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3310 .rel[a].bss sections. */
3311
3312 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3313 if (! _bfin_create_got_section (abfd, info))
3314 return FALSE;
3315
3316 /* Blackfin-specific: make sure we created everything we wanted. */
3317 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3318 /* && bfinfdpic_gotfixup_section (info) */
3319 && bfinfdpic_plt_section (info)
3320 && bfinfdpic_pltrel_section (info));
3321
3322 if (bed->want_dynbss)
3323 {
3324 /* The .dynbss section is a place to put symbols which are defined
3325 by dynamic objects, are referenced by regular objects, and are
3326 not functions. We must allocate space for them in the process
3327 image and use a R_*_COPY reloc to tell the dynamic linker to
3328 initialize them at run time. The linker script puts the .dynbss
3329 section into the .bss section of the final image. */
3330 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
3331 SEC_ALLOC | SEC_LINKER_CREATED);
3332 if (s == NULL)
3333 return FALSE;
3334
3335 /* The .rel[a].bss section holds copy relocs. This section is not
3336 normally needed. We need to create it here, though, so that the
3337 linker will map it to an output section. We can't just create it
3338 only if we need it, because we will not know whether we need it
3339 until we have seen all the input files, and the first time the
3340 main linker code calls BFD after examining all the input files
3341 (size_dynamic_sections) the input sections have already been
3342 mapped to the output sections. If the section turns out not to
3343 be needed, we can discard it later. We will never need this
3344 section when generating a shared object, since they do not use
3345 copy relocs. */
3346 if (! bfd_link_pic (info))
3347 {
3348 s = bfd_make_section_anyway_with_flags (abfd,
3349 ".rela.bss",
3350 flags | SEC_READONLY);
3351 if (s == NULL
3352 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3353 return FALSE;
3354 }
3355 }
3356
3357 return TRUE;
3358 }
3359
3360 /* Compute the total GOT size required by each symbol in each range.
3361 Symbols may require up to 4 words in the GOT: an entry pointing to
3362 the symbol, an entry pointing to its function descriptor, and a
3363 private function descriptors taking two words. */
3364
3365 static void
3366 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3367 struct _bfinfdpic_dynamic_got_info *dinfo)
3368 {
3369 /* Allocate space for a GOT entry pointing to the symbol. */
3370 if (entry->got17m4)
3371 dinfo->got17m4 += 4;
3372 else if (entry->gothilo)
3373 dinfo->gothilo += 4;
3374 else
3375 entry->relocs32--;
3376 entry->relocs32++;
3377
3378 /* Allocate space for a GOT entry pointing to the function
3379 descriptor. */
3380 if (entry->fdgot17m4)
3381 dinfo->got17m4 += 4;
3382 else if (entry->fdgothilo)
3383 dinfo->gothilo += 4;
3384 else
3385 entry->relocsfd--;
3386 entry->relocsfd++;
3387
3388 /* Decide whether we need a PLT entry, a function descriptor in the
3389 GOT, and a lazy PLT entry for this symbol. */
3390 entry->plt = entry->call
3391 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3392 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3393 entry->privfd = entry->plt
3394 || entry->fdgoff17m4 || entry->fdgoffhilo
3395 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3396 && (entry->symndx != -1
3397 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3398 entry->lazyplt = entry->privfd
3399 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3400 && ! (dinfo->info->flags & DF_BIND_NOW)
3401 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3402
3403 /* Allocate space for a function descriptor. */
3404 if (entry->fdgoff17m4)
3405 dinfo->fd17m4 += 8;
3406 else if (entry->privfd && entry->plt)
3407 dinfo->fdplt += 8;
3408 else if (entry->privfd)
3409 dinfo->fdhilo += 8;
3410 else
3411 entry->relocsfdv--;
3412 entry->relocsfdv++;
3413
3414 if (entry->lazyplt)
3415 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3416 }
3417
3418 /* Compute the number of dynamic relocations and fixups that a symbol
3419 requires, and add (or subtract) from the grand and per-symbol
3420 totals. */
3421
3422 static void
3423 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3424 struct _bfinfdpic_dynamic_got_info *dinfo,
3425 bfd_boolean subtract)
3426 {
3427 bfd_vma relocs = 0, fixups = 0;
3428
3429 if (!bfd_link_pde (dinfo->info))
3430 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3431 else
3432 {
3433 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3434 {
3435 if (entry->symndx != -1
3436 || entry->d.h->root.type != bfd_link_hash_undefweak)
3437 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3438 }
3439 else
3440 relocs += entry->relocs32 + entry->relocsfdv;
3441
3442 if (entry->symndx != -1
3443 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3444 {
3445 if (entry->symndx != -1
3446 || entry->d.h->root.type != bfd_link_hash_undefweak)
3447 fixups += entry->relocsfd;
3448 }
3449 else
3450 relocs += entry->relocsfd;
3451 }
3452
3453 if (subtract)
3454 {
3455 relocs = - relocs;
3456 fixups = - fixups;
3457 }
3458
3459 entry->dynrelocs += relocs;
3460 entry->fixups += fixups;
3461 dinfo->relocs += relocs;
3462 dinfo->fixups += fixups;
3463 }
3464
3465 /* Compute the total GOT and PLT size required by each symbol in each range. *
3466 Symbols may require up to 4 words in the GOT: an entry pointing to
3467 the symbol, an entry pointing to its function descriptor, and a
3468 private function descriptors taking two words. */
3469
3470 static int
3471 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3472 {
3473 struct bfinfdpic_relocs_info *entry = *entryp;
3474 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3475
3476 _bfinfdpic_count_nontls_entries (entry, dinfo);
3477
3478 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3479
3480 return 1;
3481 }
3482
3483 /* This structure is used to assign offsets to got entries, function
3484 descriptors, plt entries and lazy plt entries. */
3485
3486 struct _bfinfdpic_dynamic_got_plt_info
3487 {
3488 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3489 struct _bfinfdpic_dynamic_got_info g;
3490
3491 /* For each addressable range, we record a MAX (positive) and MIN
3492 (negative) value. CUR is used to assign got entries, and it's
3493 incremented from an initial positive value to MAX, then from MIN
3494 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3495 assign function descriptors, and it's decreased from an initial
3496 non-positive value to MIN, then from MAX down to CUR (unless CUR
3497 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3498 to even words. ODD, if non-zero, indicates an odd word to be
3499 used for the next got entry, otherwise CUR is used and
3500 incremented by a pair of words, wrapping around when it reaches
3501 MAX. FDCUR is decremented (and wrapped) before the next function
3502 descriptor is chosen. FDPLT indicates the number of remaining
3503 slots that can be used for function descriptors used only by PLT
3504 entries. */
3505 struct _bfinfdpic_dynamic_got_alloc_data
3506 {
3507 bfd_signed_vma max, cur, odd, fdcur, min;
3508 bfd_vma fdplt;
3509 } got17m4, gothilo;
3510 };
3511
3512 /* Determine the positive and negative ranges to be used by each
3513 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3514 double-word boundary, are the minimum (negative) and maximum
3515 (positive) GOT offsets already used by previous ranges, except for
3516 an ODD entry that may have been left behind. GOT and FD indicate
3517 the size of GOT entries and function descriptors that must be
3518 placed within the range from -WRAP to WRAP. If there's room left,
3519 up to FDPLT bytes should be reserved for additional function
3520 descriptors. */
3521
3522 inline static bfd_signed_vma
3523 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3524 bfd_signed_vma fdcur,
3525 bfd_signed_vma odd,
3526 bfd_signed_vma cur,
3527 bfd_vma got,
3528 bfd_vma fd,
3529 bfd_vma fdplt,
3530 bfd_vma wrap)
3531 {
3532 bfd_signed_vma wrapmin = -wrap;
3533
3534 /* Start at the given initial points. */
3535 gad->fdcur = fdcur;
3536 gad->cur = cur;
3537
3538 /* If we had an incoming odd word and we have any got entries that
3539 are going to use it, consume it, otherwise leave gad->odd at
3540 zero. We might force gad->odd to zero and return the incoming
3541 odd such that it is used by the next range, but then GOT entries
3542 might appear to be out of order and we wouldn't be able to
3543 shorten the GOT by one word if it turns out to end with an
3544 unpaired GOT entry. */
3545 if (odd && got)
3546 {
3547 gad->odd = odd;
3548 got -= 4;
3549 odd = 0;
3550 }
3551 else
3552 gad->odd = 0;
3553
3554 /* If we're left with an unpaired GOT entry, compute its location
3555 such that we can return it. Otherwise, if got doesn't require an
3556 odd number of words here, either odd was already zero in the
3557 block above, or it was set to zero because got was non-zero, or
3558 got was already zero. In the latter case, we want the value of
3559 odd to carry over to the return statement, so we don't want to
3560 reset odd unless the condition below is true. */
3561 if (got & 4)
3562 {
3563 odd = cur + got;
3564 got += 4;
3565 }
3566
3567 /* Compute the tentative boundaries of this range. */
3568 gad->max = cur + got;
3569 gad->min = fdcur - fd;
3570 gad->fdplt = 0;
3571
3572 /* If function descriptors took too much space, wrap some of them
3573 around. */
3574 if (gad->min < wrapmin)
3575 {
3576 gad->max += wrapmin - gad->min;
3577 gad->min = wrapmin;
3578 }
3579 /* If there is space left and we have function descriptors
3580 referenced in PLT entries that could take advantage of shorter
3581 offsets, place them here. */
3582 else if (fdplt && gad->min > wrapmin)
3583 {
3584 bfd_vma fds;
3585 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3586 fds = gad->min - wrapmin;
3587 else
3588 fds = fdplt;
3589
3590 fdplt -= fds;
3591 gad->min -= fds;
3592 gad->fdplt += fds;
3593 }
3594
3595 /* If GOT entries took too much space, wrap some of them around.
3596 This may well cause gad->min to become lower than wrapmin. This
3597 will cause a relocation overflow later on, so we don't have to
3598 report it here . */
3599 if ((bfd_vma) gad->max > wrap)
3600 {
3601 gad->min -= gad->max - wrap;
3602 gad->max = wrap;
3603 }
3604 /* If there is more space left, try to place some more function
3605 descriptors for PLT entries. */
3606 else if (fdplt && (bfd_vma) gad->max < wrap)
3607 {
3608 bfd_vma fds;
3609 if ((bfd_vma) (wrap - gad->max) < fdplt)
3610 fds = wrap - gad->max;
3611 else
3612 fds = fdplt;
3613
3614 fdplt -= fds;
3615 gad->max += fds;
3616 gad->fdplt += fds;
3617 }
3618
3619 /* If odd was initially computed as an offset past the wrap point,
3620 wrap it around. */
3621 if (odd > gad->max)
3622 odd = gad->min + odd - gad->max;
3623
3624 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3625 before returning, so do it here too. This guarantees that,
3626 should cur and fdcur meet at the wrap point, they'll both be
3627 equal to min. */
3628 if (gad->cur == gad->max)
3629 gad->cur = gad->min;
3630
3631 return odd;
3632 }
3633
3634 /* Compute the location of the next GOT entry, given the allocation
3635 data for a range. */
3636
3637 inline static bfd_signed_vma
3638 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3639 {
3640 bfd_signed_vma ret;
3641
3642 if (gad->odd)
3643 {
3644 /* If there was an odd word left behind, use it. */
3645 ret = gad->odd;
3646 gad->odd = 0;
3647 }
3648 else
3649 {
3650 /* Otherwise, use the word pointed to by cur, reserve the next
3651 as an odd word, and skip to the next pair of words, possibly
3652 wrapping around. */
3653 ret = gad->cur;
3654 gad->odd = gad->cur + 4;
3655 gad->cur += 8;
3656 if (gad->cur == gad->max)
3657 gad->cur = gad->min;
3658 }
3659
3660 return ret;
3661 }
3662
3663 /* Compute the location of the next function descriptor entry in the
3664 GOT, given the allocation data for a range. */
3665
3666 inline static bfd_signed_vma
3667 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3668 {
3669 /* If we're at the bottom, wrap around, and only then allocate the
3670 next pair of words. */
3671 if (gad->fdcur == gad->min)
3672 gad->fdcur = gad->max;
3673 return gad->fdcur -= 8;
3674 }
3675
3676 /* Assign GOT offsets for every GOT entry and function descriptor.
3677 Doing everything in a single pass is tricky. */
3678
3679 static int
3680 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3681 {
3682 struct bfinfdpic_relocs_info *entry = *entryp;
3683 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3684
3685 if (entry->got17m4)
3686 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3687 else if (entry->gothilo)
3688 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3689
3690 if (entry->fdgot17m4)
3691 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3692 else if (entry->fdgothilo)
3693 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3694
3695 if (entry->fdgoff17m4)
3696 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3697 else if (entry->plt && dinfo->got17m4.fdplt)
3698 {
3699 dinfo->got17m4.fdplt -= 8;
3700 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3701 }
3702 else if (entry->plt)
3703 {
3704 dinfo->gothilo.fdplt -= 8;
3705 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3706 }
3707 else if (entry->privfd)
3708 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3709
3710 return 1;
3711 }
3712
3713 /* Assign GOT offsets to private function descriptors used by PLT
3714 entries (or referenced by 32-bit offsets), as well as PLT entries
3715 and lazy PLT entries. */
3716
3717 static int
3718 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3719 {
3720 struct bfinfdpic_relocs_info *entry = *entryp;
3721 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3722
3723 /* If this symbol requires a local function descriptor, allocate
3724 one. */
3725 if (entry->privfd && entry->fd_entry == 0)
3726 {
3727 if (dinfo->got17m4.fdplt)
3728 {
3729 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3730 dinfo->got17m4.fdplt -= 8;
3731 }
3732 else
3733 {
3734 BFD_ASSERT (dinfo->gothilo.fdplt);
3735 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3736 dinfo->gothilo.fdplt -= 8;
3737 }
3738 }
3739
3740 if (entry->plt)
3741 {
3742 int size;
3743
3744 /* We use the section's raw size to mark the location of the
3745 next PLT entry. */
3746 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3747
3748 /* Figure out the length of this PLT entry based on the
3749 addressing mode we need to reach the function descriptor. */
3750 BFD_ASSERT (entry->fd_entry);
3751 if (entry->fd_entry >= -(1 << (18 - 1))
3752 && entry->fd_entry + 4 < (1 << (18 - 1)))
3753 size = 10;
3754 else
3755 size = 16;
3756
3757 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3758 }
3759
3760 if (entry->lazyplt)
3761 {
3762 entry->lzplt_entry = dinfo->g.lzplt;
3763 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3764 /* If this entry is the one that gets the resolver stub, account
3765 for the additional instruction. */
3766 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3767 == BFINFDPIC_LZPLT_RESOLV_LOC)
3768 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3769 }
3770
3771 return 1;
3772 }
3773
3774 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3775 _bfinfdpic_assign_plt_entries. */
3776
3777 static int
3778 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
3779 {
3780 struct bfinfdpic_relocs_info *entry = *entryp;
3781
3782 entry->got_entry = 0;
3783 entry->fdgot_entry = 0;
3784 entry->fd_entry = 0;
3785 entry->plt_entry = (bfd_vma)-1;
3786 entry->lzplt_entry = (bfd_vma)-1;
3787
3788 return 1;
3789 }
3790
3791 /* Follow indirect and warning hash entries so that each got entry
3792 points to the final symbol definition. P must point to a pointer
3793 to the hash table we're traversing. Since this traversal may
3794 modify the hash table, we set this pointer to NULL to indicate
3795 we've made a potentially-destructive change to the hash table, so
3796 the traversal must be restarted. */
3797 static int
3798 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
3799 {
3800 struct bfinfdpic_relocs_info *entry = *entryp;
3801 htab_t *htab = p;
3802
3803 if (entry->symndx == -1)
3804 {
3805 struct elf_link_hash_entry *h = entry->d.h;
3806 struct bfinfdpic_relocs_info *oentry;
3807
3808 while (h->root.type == bfd_link_hash_indirect
3809 || h->root.type == bfd_link_hash_warning)
3810 h = (struct elf_link_hash_entry *)h->root.u.i.link;
3811
3812 if (entry->d.h == h)
3813 return 1;
3814
3815 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
3816 NO_INSERT);
3817
3818 if (oentry)
3819 {
3820 /* Merge the two entries. */
3821 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
3822 htab_clear_slot (*htab, entryp);
3823 return 1;
3824 }
3825
3826 entry->d.h = h;
3827
3828 /* If we can't find this entry with the new bfd hash, re-insert
3829 it, and get the traversal restarted. */
3830 if (! htab_find (*htab, entry))
3831 {
3832 htab_clear_slot (*htab, entryp);
3833 entryp = htab_find_slot (*htab, entry, INSERT);
3834 if (! *entryp)
3835 *entryp = entry;
3836 /* Abort the traversal, since the whole table may have
3837 moved, and leave it up to the parent to restart the
3838 process. */
3839 *(htab_t *)p = NULL;
3840 return 0;
3841 }
3842 }
3843
3844 return 1;
3845 }
3846
3847 /* Compute the total size of the GOT, the PLT, the dynamic relocations
3848 section and the rofixup section. Assign locations for GOT and PLT
3849 entries. */
3850
3851 static bfd_boolean
3852 _bfinfdpic_size_got_plt (bfd *output_bfd,
3853 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
3854 {
3855 bfd_signed_vma odd;
3856 bfd_vma limit;
3857 struct bfd_link_info *info = gpinfop->g.info;
3858 bfd *dynobj = elf_hash_table (info)->dynobj;
3859
3860 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
3861 sizeof (gpinfop->g));
3862
3863 odd = 12;
3864 /* Compute the total size taken by entries in the 18-bit range,
3865 to tell how many PLT function descriptors we can bring into it
3866 without causing it to overflow. */
3867 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
3868 if (limit < (bfd_vma)1 << 18)
3869 limit = ((bfd_vma)1 << 18) - limit;
3870 else
3871 limit = 0;
3872 if (gpinfop->g.fdplt < limit)
3873 limit = gpinfop->g.fdplt;
3874
3875 /* Determine the ranges of GOT offsets that we can use for each
3876 range of addressing modes. */
3877 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
3878 0,
3879 odd,
3880 16,
3881 gpinfop->g.got17m4,
3882 gpinfop->g.fd17m4,
3883 limit,
3884 (bfd_vma)1 << (18-1));
3885 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
3886 gpinfop->got17m4.min,
3887 odd,
3888 gpinfop->got17m4.max,
3889 gpinfop->g.gothilo,
3890 gpinfop->g.fdhilo,
3891 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
3892 (bfd_vma)1 << (32-1));
3893
3894 /* Now assign (most) GOT offsets. */
3895 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
3896 gpinfop);
3897
3898 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
3899 - gpinfop->gothilo.min
3900 /* If an odd word is the last word of the GOT, we don't need this
3901 word to be part of the GOT. */
3902 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
3903 if (bfinfdpic_got_section (info)->size == 0)
3904 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
3905 else if (bfinfdpic_got_section (info)->size == 12
3906 && ! elf_hash_table (info)->dynamic_sections_created)
3907 {
3908 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
3909 bfinfdpic_got_section (info)->size = 0;
3910 }
3911 else
3912 {
3913 bfinfdpic_got_section (info)->contents =
3914 (bfd_byte *) bfd_zalloc (dynobj,
3915 bfinfdpic_got_section (info)->size);
3916 if (bfinfdpic_got_section (info)->contents == NULL)
3917 return FALSE;
3918 }
3919
3920 if (elf_hash_table (info)->dynamic_sections_created)
3921 /* Subtract the number of lzplt entries, since those will generate
3922 relocations in the pltrel section. */
3923 bfinfdpic_gotrel_section (info)->size =
3924 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
3925 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
3926 else
3927 BFD_ASSERT (gpinfop->g.relocs == 0);
3928 if (bfinfdpic_gotrel_section (info)->size == 0)
3929 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
3930 else
3931 {
3932 bfinfdpic_gotrel_section (info)->contents =
3933 (bfd_byte *) bfd_zalloc (dynobj,
3934 bfinfdpic_gotrel_section (info)->size);
3935 if (bfinfdpic_gotrel_section (info)->contents == NULL)
3936 return FALSE;
3937 }
3938
3939 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
3940 if (bfinfdpic_gotfixup_section (info)->size == 0)
3941 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
3942 else
3943 {
3944 bfinfdpic_gotfixup_section (info)->contents =
3945 (bfd_byte *) bfd_zalloc (dynobj,
3946 bfinfdpic_gotfixup_section (info)->size);
3947 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
3948 return FALSE;
3949 }
3950
3951 if (elf_hash_table (info)->dynamic_sections_created)
3952 bfinfdpic_pltrel_section (info)->size =
3953 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
3954 if (bfinfdpic_pltrel_section (info)->size == 0)
3955 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
3956 else
3957 {
3958 bfinfdpic_pltrel_section (info)->contents =
3959 (bfd_byte *) bfd_zalloc (dynobj,
3960 bfinfdpic_pltrel_section (info)->size);
3961 if (bfinfdpic_pltrel_section (info)->contents == NULL)
3962 return FALSE;
3963 }
3964
3965 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
3966 such that there's room for the additional instruction needed to
3967 call the resolver. Since _bfinfdpic_assign_got_entries didn't
3968 account for them, our block size is 4 bytes smaller than the real
3969 block size. */
3970 if (elf_hash_table (info)->dynamic_sections_created)
3971 {
3972 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
3973 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
3974 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
3975 }
3976
3977 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
3978 actually assign lazy PLT entries addresses. */
3979 gpinfop->g.lzplt = 0;
3980
3981 /* Save information that we're going to need to generate GOT and PLT
3982 entries. */
3983 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
3984
3985 if (get_elf_backend_data (output_bfd)->want_got_sym)
3986 elf_hash_table (info)->hgot->root.u.def.value
3987 = bfinfdpic_got_initial_offset (info);
3988
3989 if (elf_hash_table (info)->dynamic_sections_created)
3990 bfinfdpic_plt_initial_offset (info) =
3991 bfinfdpic_plt_section (info)->size;
3992
3993 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
3994 gpinfop);
3995
3996 /* Allocate the PLT section contents only after
3997 _bfinfdpic_assign_plt_entries has a chance to add the size of the
3998 non-lazy PLT entries. */
3999 if (bfinfdpic_plt_section (info)->size == 0)
4000 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4001 else
4002 {
4003 bfinfdpic_plt_section (info)->contents =
4004 (bfd_byte *) bfd_zalloc (dynobj,
4005 bfinfdpic_plt_section (info)->size);
4006 if (bfinfdpic_plt_section (info)->contents == NULL)
4007 return FALSE;
4008 }
4009
4010 return TRUE;
4011 }
4012
4013 /* Set the sizes of the dynamic sections. */
4014
4015 static bfd_boolean
4016 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4017 struct bfd_link_info *info)
4018 {
4019 struct elf_link_hash_table *htab;
4020 bfd *dynobj;
4021 asection *s;
4022 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4023
4024 htab = elf_hash_table (info);
4025 dynobj = htab->dynobj;
4026 BFD_ASSERT (dynobj != NULL);
4027
4028 if (htab->dynamic_sections_created)
4029 {
4030 /* Set the contents of the .interp section to the interpreter. */
4031 if (bfd_link_executable (info) && !info->nointerp)
4032 {
4033 s = bfd_get_linker_section (dynobj, ".interp");
4034 BFD_ASSERT (s != NULL);
4035 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4036 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4037 }
4038 }
4039
4040 memset (&gpinfo, 0, sizeof (gpinfo));
4041 gpinfo.g.info = info;
4042
4043 for (;;)
4044 {
4045 htab_t relocs = bfinfdpic_relocs_info (info);
4046
4047 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4048
4049 if (relocs == bfinfdpic_relocs_info (info))
4050 break;
4051 }
4052
4053 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4054 &gpinfo.g);
4055
4056 /* Allocate space to save the summary information, we're going to
4057 use it if we're doing relaxations. */
4058 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4059
4060 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4061 return FALSE;
4062
4063 if (elf_hash_table (info)->dynamic_sections_created)
4064 {
4065 if (bfinfdpic_got_section (info)->size)
4066 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4067 return FALSE;
4068
4069 if (bfinfdpic_pltrel_section (info)->size)
4070 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4071 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4072 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4073 return FALSE;
4074
4075 if (bfinfdpic_gotrel_section (info)->size)
4076 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4077 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4078 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4079 sizeof (Elf32_External_Rel)))
4080 return FALSE;
4081 }
4082
4083 s = bfd_get_linker_section (dynobj, ".dynbss");
4084 if (s && s->size == 0)
4085 s->flags |= SEC_EXCLUDE;
4086
4087 s = bfd_get_linker_section (dynobj, ".rela.bss");
4088 if (s && s->size == 0)
4089 s->flags |= SEC_EXCLUDE;
4090
4091 return TRUE;
4092 }
4093
4094 static bfd_boolean
4095 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4096 struct bfd_link_info *info)
4097 {
4098 if (!bfd_link_relocatable (info)
4099 && !bfd_elf_stack_segment_size (output_bfd, info,
4100 "__stacksize", DEFAULT_STACK_SIZE))
4101 return FALSE;
4102
4103 return TRUE;
4104 }
4105
4106 /* Check whether any of the relocations was optimized away, and
4107 subtract it from the relocation or fixup count. */
4108 static bfd_boolean
4109 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4110 struct bfd_link_info *info,
4111 bfd_boolean *changed)
4112 {
4113 Elf_Internal_Shdr *symtab_hdr;
4114 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4115 Elf_Internal_Rela *rel, *erel;
4116
4117 if ((sec->flags & SEC_RELOC) == 0
4118 || sec->reloc_count == 0)
4119 return TRUE;
4120
4121 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4122 sym_hashes = elf_sym_hashes (abfd);
4123 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4124 if (!elf_bad_symtab (abfd))
4125 sym_hashes_end -= symtab_hdr->sh_info;
4126
4127 rel = elf_section_data (sec)->relocs;
4128
4129 /* Now examine each relocation. */
4130 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4131 {
4132 struct elf_link_hash_entry *h;
4133 unsigned long r_symndx;
4134 struct bfinfdpic_relocs_info *picrel;
4135 struct _bfinfdpic_dynamic_got_info *dinfo;
4136
4137 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4138 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4139 continue;
4140
4141 if (_bfd_elf_section_offset (sec->output_section->owner,
4142 info, sec, rel->r_offset)
4143 != (bfd_vma)-1)
4144 continue;
4145
4146 r_symndx = ELF32_R_SYM (rel->r_info);
4147 if (r_symndx < symtab_hdr->sh_info)
4148 h = NULL;
4149 else
4150 {
4151 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4152 while (h->root.type == bfd_link_hash_indirect
4153 || h->root.type == bfd_link_hash_warning)
4154 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4155 }
4156
4157 if (h != NULL)
4158 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4159 abfd, h,
4160 rel->r_addend, NO_INSERT);
4161 else
4162 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4163 abfd, r_symndx,
4164 rel->r_addend, NO_INSERT);
4165
4166 if (! picrel)
4167 return FALSE;
4168
4169 *changed = TRUE;
4170 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4171
4172 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4173 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4174 picrel->relocs32--;
4175 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4176 picrel->relocsfd--;
4177 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4178 }
4179
4180 return TRUE;
4181 }
4182
4183 static bfd_boolean
4184 bfinfdpic_elf_discard_info (bfd *ibfd,
4185 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4186 struct bfd_link_info *info)
4187 {
4188 bfd_boolean changed = FALSE;
4189 asection *s;
4190 bfd *obfd = NULL;
4191
4192 /* Account for relaxation of .eh_frame section. */
4193 for (s = ibfd->sections; s; s = s->next)
4194 if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4195 {
4196 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4197 return FALSE;
4198 obfd = s->output_section->owner;
4199 }
4200
4201 if (changed)
4202 {
4203 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4204
4205 memset (&gpinfo, 0, sizeof (gpinfo));
4206 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4207 sizeof (gpinfo.g));
4208
4209 /* Clear GOT and PLT assignments. */
4210 htab_traverse (bfinfdpic_relocs_info (info),
4211 _bfinfdpic_reset_got_plt_entries,
4212 NULL);
4213
4214 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4215 return FALSE;
4216 }
4217
4218 return TRUE;
4219 }
4220
4221 static bfd_boolean
4222 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4223 struct bfd_link_info *info)
4224 {
4225 bfd *dynobj;
4226 asection *sdyn;
4227
4228 dynobj = elf_hash_table (info)->dynobj;
4229
4230 if (bfinfdpic_got_section (info))
4231 {
4232 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4233 /* PR 17334: It appears that the GOT section can end up
4234 being bigger than the number of relocs. Presumably
4235 because some relocs have been deleted. A test case has
4236 yet to be generated for verify this, but in the meantime
4237 the test below has been changed from == to >= so that
4238 applications can continue to be built. */
4239 >= (bfinfdpic_gotrel_section (info)->reloc_count
4240 * sizeof (Elf32_External_Rel)));
4241
4242 if (bfinfdpic_gotfixup_section (info))
4243 {
4244 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4245 bfd_vma got_value = hgot->root.u.def.value
4246 + hgot->root.u.def.section->output_section->vma
4247 + hgot->root.u.def.section->output_offset;
4248
4249 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4250 got_value, 0);
4251
4252 if (bfinfdpic_gotfixup_section (info)->size
4253 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4254 {
4255 _bfd_error_handler
4256 ("LINKER BUG: .rofixup section size mismatch");
4257 return FALSE;
4258 }
4259 }
4260 }
4261 if (elf_hash_table (info)->dynamic_sections_created)
4262 {
4263 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4264 == (bfinfdpic_pltrel_section (info)->reloc_count
4265 * sizeof (Elf32_External_Rel)));
4266 }
4267
4268 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4269
4270 if (elf_hash_table (info)->dynamic_sections_created)
4271 {
4272 Elf32_External_Dyn * dyncon;
4273 Elf32_External_Dyn * dynconend;
4274
4275 BFD_ASSERT (sdyn != NULL);
4276
4277 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4278 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4279
4280 for (; dyncon < dynconend; dyncon++)
4281 {
4282 Elf_Internal_Dyn dyn;
4283
4284 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4285
4286 switch (dyn.d_tag)
4287 {
4288 default:
4289 break;
4290
4291 case DT_PLTGOT:
4292 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4293 + bfinfdpic_got_section (info)->output_offset
4294 + bfinfdpic_got_initial_offset (info);
4295 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4296 break;
4297
4298 case DT_JMPREL:
4299 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4300 ->output_section->vma
4301 + bfinfdpic_pltrel_section (info)->output_offset;
4302 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4303 break;
4304
4305 case DT_PLTRELSZ:
4306 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4307 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4308 break;
4309 }
4310 }
4311 }
4312
4313 return TRUE;
4314 }
4315
4316 /* Adjust a symbol defined by a dynamic object and referenced by a
4317 regular object. */
4318
4319 static bfd_boolean
4320 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info *info,
4321 struct elf_link_hash_entry *h)
4322 {
4323 bfd * dynobj;
4324
4325 dynobj = elf_hash_table (info)->dynobj;
4326
4327 /* Make sure we know what is going on here. */
4328 BFD_ASSERT (dynobj != NULL
4329 && (h->is_weakalias
4330 || (h->def_dynamic
4331 && h->ref_regular
4332 && !h->def_regular)));
4333
4334 /* If this is a weak symbol, and there is a real definition, the
4335 processor independent code will have arranged for us to see the
4336 real definition first, and we can just use the same value. */
4337 if (h->is_weakalias)
4338 {
4339 struct elf_link_hash_entry *def = weakdef (h);
4340 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
4341 h->root.u.def.section = def->root.u.def.section;
4342 h->root.u.def.value = def->root.u.def.value;
4343 }
4344
4345 return TRUE;
4346 }
4347
4348 /* Perform any actions needed for dynamic symbols. */
4349
4350 static bfd_boolean
4351 elf32_bfinfdpic_finish_dynamic_symbol
4352 (bfd *output_bfd ATTRIBUTE_UNUSED,
4353 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4354 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4355 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4356 {
4357 return TRUE;
4358 }
4359
4360 /* Decide whether to attempt to turn absptr or lsda encodings in
4361 shared libraries into pcrel within the given input section. */
4362
4363 static bfd_boolean
4364 bfinfdpic_elf_use_relative_eh_frame
4365 (bfd *input_bfd ATTRIBUTE_UNUSED,
4366 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4367 asection *eh_frame_section ATTRIBUTE_UNUSED)
4368 {
4369 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4370 return FALSE;
4371 }
4372
4373 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4374
4375 static bfd_byte
4376 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4377 struct bfd_link_info *info,
4378 asection *osec, bfd_vma offset,
4379 asection *loc_sec, bfd_vma loc_offset,
4380 bfd_vma *encoded)
4381 {
4382 struct elf_link_hash_entry *h;
4383
4384 h = elf_hash_table (info)->hgot;
4385 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4386
4387 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4388 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4389 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4390 loc_sec, loc_offset, encoded);
4391
4392 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4393 == (_bfinfdpic_osec_to_segment
4394 (abfd, h->root.u.def.section->output_section)));
4395
4396 *encoded = osec->vma + offset
4397 - (h->root.u.def.value
4398 + h->root.u.def.section->output_section->vma
4399 + h->root.u.def.section->output_offset);
4400
4401 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4402 }
4403
4404
4405
4406 /* Look through the relocs for a section during the first phase.
4407
4408 Besides handling virtual table relocs for gc, we have to deal with
4409 all sorts of PIC-related relocations. We describe below the
4410 general plan on how to handle such relocations, even though we only
4411 collect information at this point, storing them in hash tables for
4412 perusal of later passes.
4413
4414 32 relocations are propagated to the linker output when creating
4415 position-independent output. LO16 and HI16 relocations are not
4416 supposed to be encountered in this case.
4417
4418 LABEL16 should always be resolvable by the linker, since it's only
4419 used by branches.
4420
4421 LABEL24, on the other hand, is used by calls. If it turns out that
4422 the target of a call is a dynamic symbol, a PLT entry must be
4423 created for it, which triggers the creation of a private function
4424 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4425
4426 GPREL relocations require the referenced symbol to be in the same
4427 segment as _gp, but this can only be checked later.
4428
4429 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4430 exist. LABEL24 might as well, since it may require a PLT entry,
4431 that will require a got.
4432
4433 Non-FUNCDESC GOT relocations require a GOT entry to be created
4434 regardless of whether the symbol is dynamic. However, since a
4435 global symbol that turns out to not be exported may have the same
4436 address of a non-dynamic symbol, we don't assign GOT entries at
4437 this point, such that we can share them in this case. A relocation
4438 for the GOT entry always has to be created, be it to offset a
4439 private symbol by the section load address, be it to get the symbol
4440 resolved dynamically.
4441
4442 FUNCDESC GOT relocations require a GOT entry to be created, and
4443 handled as if a FUNCDESC relocation was applied to the GOT entry in
4444 an object file.
4445
4446 FUNCDESC relocations referencing a symbol that turns out to NOT be
4447 dynamic cause a private function descriptor to be created. The
4448 FUNCDESC relocation then decays to a 32 relocation that points at
4449 the private descriptor. If the symbol is dynamic, the FUNCDESC
4450 relocation is propagated to the linker output, such that the
4451 dynamic linker creates the canonical descriptor, pointing to the
4452 dynamically-resolved definition of the function.
4453
4454 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4455 symbols that are assigned to the same segment as the GOT, but we
4456 can only check this later, after we know the complete set of
4457 symbols defined and/or exported.
4458
4459 FUNCDESC GOTOFF relocations require a function descriptor to be
4460 created and, unless lazy binding is disabled or the symbol is not
4461 dynamic, a lazy PLT entry. Since we can't tell at this point
4462 whether a symbol is going to be dynamic, we have to decide later
4463 whether to create a lazy PLT entry or bind the descriptor directly
4464 to the private function.
4465
4466 FUNCDESC_VALUE relocations are not supposed to be present in object
4467 files, but they may very well be simply propagated to the linker
4468 output, since they have no side effect.
4469
4470
4471 A function descriptor always requires a FUNCDESC_VALUE relocation.
4472 Whether it's in .plt.rel or not depends on whether lazy binding is
4473 enabled and on whether the referenced symbol is dynamic.
4474
4475 The existence of a lazy PLT requires the resolverStub lazy PLT
4476 entry to be present.
4477
4478
4479 As for assignment of GOT, PLT and lazy PLT entries, and private
4480 descriptors, we might do them all sequentially, but we can do
4481 better than that. For example, we can place GOT entries and
4482 private function descriptors referenced using 12-bit operands
4483 closer to the PIC register value, such that these relocations don't
4484 overflow. Those that are only referenced with LO16 relocations
4485 could come next, but we may as well place PLT-required function
4486 descriptors in the 12-bit range to make them shorter. Symbols
4487 referenced with LO16/HI16 may come next, but we may place
4488 additional function descriptors in the 16-bit range if we can
4489 reliably tell that we've already placed entries that are ever
4490 referenced with only LO16. PLT entries are therefore generated as
4491 small as possible, while not introducing relocation overflows in
4492 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4493 generated before or after PLT entries, but not intermingled with
4494 them, such that we can have more lazy PLT entries in range for a
4495 branch to the resolverStub. The resolverStub should be emitted at
4496 the most distant location from the first lazy PLT entry such that
4497 it's still in range for a branch, or closer, if there isn't a need
4498 for so many lazy PLT entries. Additional lazy PLT entries may be
4499 emitted after the resolverStub, as long as branches are still in
4500 range. If the branch goes out of range, longer lazy PLT entries
4501 are emitted.
4502
4503 We could further optimize PLT and lazy PLT entries by giving them
4504 priority in assignment to closer-to-gr17 locations depending on the
4505 number of occurrences of references to them (assuming a function
4506 that's called more often is more important for performance, so its
4507 PLT entry should be faster), or taking hints from the compiler.
4508 Given infinite time and money... :-) */
4509
4510 static bfd_boolean
4511 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4512 asection *sec, const Elf_Internal_Rela *relocs)
4513 {
4514 Elf_Internal_Shdr *symtab_hdr;
4515 struct elf_link_hash_entry **sym_hashes;
4516 const Elf_Internal_Rela *rel;
4517 const Elf_Internal_Rela *rel_end;
4518 bfd *dynobj;
4519 struct bfinfdpic_relocs_info *picrel;
4520
4521 if (bfd_link_relocatable (info))
4522 return TRUE;
4523
4524 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4525 sym_hashes = elf_sym_hashes (abfd);
4526
4527 dynobj = elf_hash_table (info)->dynobj;
4528 rel_end = relocs + sec->reloc_count;
4529 for (rel = relocs; rel < rel_end; rel++)
4530 {
4531 struct elf_link_hash_entry *h;
4532 unsigned long r_symndx;
4533
4534 r_symndx = ELF32_R_SYM (rel->r_info);
4535 if (r_symndx < symtab_hdr->sh_info)
4536 h = NULL;
4537 else
4538 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4539
4540 switch (ELF32_R_TYPE (rel->r_info))
4541 {
4542 case R_BFIN_GOT17M4:
4543 case R_BFIN_GOTHI:
4544 case R_BFIN_GOTLO:
4545 case R_BFIN_FUNCDESC_GOT17M4:
4546 case R_BFIN_FUNCDESC_GOTHI:
4547 case R_BFIN_FUNCDESC_GOTLO:
4548 case R_BFIN_GOTOFF17M4:
4549 case R_BFIN_GOTOFFHI:
4550 case R_BFIN_GOTOFFLO:
4551 case R_BFIN_FUNCDESC_GOTOFF17M4:
4552 case R_BFIN_FUNCDESC_GOTOFFHI:
4553 case R_BFIN_FUNCDESC_GOTOFFLO:
4554 case R_BFIN_FUNCDESC:
4555 case R_BFIN_FUNCDESC_VALUE:
4556 if (! IS_FDPIC (abfd))
4557 goto bad_reloc;
4558 /* Fall through. */
4559 case R_BFIN_PCREL24:
4560 case R_BFIN_PCREL24_JUMP_L:
4561 case R_BFIN_BYTE4_DATA:
4562 if (IS_FDPIC (abfd) && ! dynobj)
4563 {
4564 elf_hash_table (info)->dynobj = dynobj = abfd;
4565 if (! _bfin_create_got_section (abfd, info))
4566 return FALSE;
4567 }
4568 if (! IS_FDPIC (abfd))
4569 {
4570 picrel = NULL;
4571 break;
4572 }
4573 if (h != NULL)
4574 {
4575 if (h->dynindx == -1)
4576 switch (ELF_ST_VISIBILITY (h->other))
4577 {
4578 case STV_INTERNAL:
4579 case STV_HIDDEN:
4580 break;
4581 default:
4582 bfd_elf_link_record_dynamic_symbol (info, h);
4583 break;
4584 }
4585 picrel
4586 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4587 abfd, h,
4588 rel->r_addend, INSERT);
4589 }
4590 else
4591 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4592 (info), abfd, r_symndx,
4593 rel->r_addend, INSERT);
4594 if (! picrel)
4595 return FALSE;
4596 break;
4597
4598 default:
4599 picrel = NULL;
4600 break;
4601 }
4602
4603 switch (ELF32_R_TYPE (rel->r_info))
4604 {
4605 case R_BFIN_PCREL24:
4606 case R_BFIN_PCREL24_JUMP_L:
4607 if (IS_FDPIC (abfd))
4608 picrel->call++;
4609 break;
4610
4611 case R_BFIN_FUNCDESC_VALUE:
4612 picrel->relocsfdv++;
4613 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4614 picrel->relocs32--;
4615 /* Fall through. */
4616
4617 case R_BFIN_BYTE4_DATA:
4618 if (! IS_FDPIC (abfd))
4619 break;
4620
4621 picrel->sym++;
4622 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4623 picrel->relocs32++;
4624 break;
4625
4626 case R_BFIN_GOT17M4:
4627 picrel->got17m4++;
4628 break;
4629
4630 case R_BFIN_GOTHI:
4631 case R_BFIN_GOTLO:
4632 picrel->gothilo++;
4633 break;
4634
4635 case R_BFIN_FUNCDESC_GOT17M4:
4636 picrel->fdgot17m4++;
4637 break;
4638
4639 case R_BFIN_FUNCDESC_GOTHI:
4640 case R_BFIN_FUNCDESC_GOTLO:
4641 picrel->fdgothilo++;
4642 break;
4643
4644 case R_BFIN_GOTOFF17M4:
4645 case R_BFIN_GOTOFFHI:
4646 case R_BFIN_GOTOFFLO:
4647 picrel->gotoff++;
4648 break;
4649
4650 case R_BFIN_FUNCDESC_GOTOFF17M4:
4651 picrel->fdgoff17m4++;
4652 break;
4653
4654 case R_BFIN_FUNCDESC_GOTOFFHI:
4655 case R_BFIN_FUNCDESC_GOTOFFLO:
4656 picrel->fdgoffhilo++;
4657 break;
4658
4659 case R_BFIN_FUNCDESC:
4660 picrel->fd++;
4661 picrel->relocsfd++;
4662 break;
4663
4664 /* This relocation describes the C++ object vtable hierarchy.
4665 Reconstruct it for later use during GC. */
4666 case R_BFIN_GNU_VTINHERIT:
4667 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4668 return FALSE;
4669 break;
4670
4671 /* This relocation describes which C++ vtable entries are actually
4672 used. Record for later use during GC. */
4673 case R_BFIN_GNU_VTENTRY:
4674 BFD_ASSERT (h != NULL);
4675 if (h != NULL
4676 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4677 return FALSE;
4678 break;
4679
4680 case R_BFIN_HUIMM16:
4681 case R_BFIN_LUIMM16:
4682 case R_BFIN_PCREL12_JUMP_S:
4683 case R_BFIN_PCREL10:
4684 break;
4685
4686 default:
4687 bad_reloc:
4688 _bfd_error_handler
4689 /* xgettext:c-format */
4690 (_("%pB: unsupported relocation type %d"),
4691 abfd, (int) ELF32_R_TYPE (rel->r_info));
4692 return FALSE;
4693 }
4694 }
4695
4696 return TRUE;
4697 }
4698
4699 /* Set the right machine number for a Blackfin ELF file. */
4700
4701 static bfd_boolean
4702 elf32_bfin_object_p (bfd *abfd)
4703 {
4704 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4705 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4706 == (IS_FDPIC (abfd)));
4707 }
4708
4709 static bfd_boolean
4710 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4711 {
4712 elf_elfheader (abfd)->e_flags = flags;
4713 elf_flags_init (abfd) = TRUE;
4714 return TRUE;
4715 }
4716
4717 /* Display the flags field. */
4718 static bfd_boolean
4719 elf32_bfin_print_private_bfd_data (bfd * abfd, void * ptr)
4720 {
4721 FILE *file = (FILE *) ptr;
4722 flagword flags;
4723
4724 BFD_ASSERT (abfd != NULL && ptr != NULL);
4725
4726 /* Print normal ELF private data. */
4727 _bfd_elf_print_private_bfd_data (abfd, ptr);
4728
4729 flags = elf_elfheader (abfd)->e_flags;
4730
4731 /* xgettext:c-format */
4732 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4733
4734 if (flags & EF_BFIN_PIC)
4735 fprintf (file, " -fpic");
4736
4737 if (flags & EF_BFIN_FDPIC)
4738 fprintf (file, " -mfdpic");
4739
4740 fputc ('\n', file);
4741
4742 return TRUE;
4743 }
4744
4745 /* Merge backend specific data from an object file to the output
4746 object file when linking. */
4747
4748 static bfd_boolean
4749 elf32_bfin_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4750 {
4751 bfd *obfd = info->output_bfd;
4752 flagword old_flags, new_flags;
4753 bfd_boolean error = FALSE;
4754
4755 new_flags = elf_elfheader (ibfd)->e_flags;
4756 old_flags = elf_elfheader (obfd)->e_flags;
4757
4758 if (new_flags & EF_BFIN_FDPIC)
4759 new_flags &= ~EF_BFIN_PIC;
4760
4761 #ifndef DEBUG
4762 if (0)
4763 #endif
4764 _bfd_error_handler
4765 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %pB",
4766 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", ibfd);
4767
4768 if (!elf_flags_init (obfd)) /* First call, no flags set. */
4769 {
4770 elf_flags_init (obfd) = TRUE;
4771 elf_elfheader (obfd)->e_flags = new_flags;
4772 }
4773
4774 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
4775 {
4776 error = TRUE;
4777 if (IS_FDPIC (obfd))
4778 _bfd_error_handler
4779 (_("%pB: cannot link non-fdpic object file into fdpic executable"),
4780 ibfd);
4781 else
4782 _bfd_error_handler
4783 (_("%pB: cannot link fdpic object file into non-fdpic executable"),
4784 ibfd);
4785 }
4786
4787 if (error)
4788 bfd_set_error (bfd_error_bad_value);
4789
4790 return !error;
4791 }
4792 \f
4793 /* bfin ELF linker hash entry. */
4794
4795 struct bfin_link_hash_entry
4796 {
4797 struct elf_link_hash_entry root;
4798
4799 /* Number of PC relative relocs copied for this symbol. */
4800 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
4801 };
4802
4803 /* bfin ELF linker hash table. */
4804
4805 struct bfin_link_hash_table
4806 {
4807 struct elf_link_hash_table root;
4808
4809 /* Small local sym cache. */
4810 struct sym_cache sym_cache;
4811 };
4812
4813 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4814
4815 static struct bfd_hash_entry *
4816 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
4817 struct bfd_hash_table *table, const char *string)
4818 {
4819 struct bfd_hash_entry *ret = entry;
4820
4821 /* Allocate the structure if it has not already been allocated by a
4822 subclass. */
4823 if (ret == NULL)
4824 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
4825 if (ret == NULL)
4826 return ret;
4827
4828 /* Call the allocation method of the superclass. */
4829 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
4830 if (ret != NULL)
4831 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
4832
4833 return ret;
4834 }
4835
4836 /* Create an bfin ELF linker hash table. */
4837
4838 static struct bfd_link_hash_table *
4839 bfin_link_hash_table_create (bfd * abfd)
4840 {
4841 struct bfin_link_hash_table *ret;
4842 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
4843
4844 ret = bfd_zmalloc (amt);
4845 if (ret == NULL)
4846 return NULL;
4847
4848 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
4849 bfin_link_hash_newfunc,
4850 sizeof (struct elf_link_hash_entry),
4851 BFIN_ELF_DATA))
4852 {
4853 free (ret);
4854 return NULL;
4855 }
4856
4857 ret->sym_cache.abfd = NULL;
4858
4859 return &ret->root.root;
4860 }
4861
4862 /* The size in bytes of an entry in the procedure linkage table. */
4863
4864 /* Finish up the dynamic sections. */
4865
4866 static bfd_boolean
4867 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4868 struct bfd_link_info *info)
4869 {
4870 bfd *dynobj;
4871 asection *sdyn;
4872
4873 dynobj = elf_hash_table (info)->dynobj;
4874
4875 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4876
4877 if (elf_hash_table (info)->dynamic_sections_created)
4878 {
4879 Elf32_External_Dyn *dyncon, *dynconend;
4880
4881 BFD_ASSERT (sdyn != NULL);
4882
4883 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4884 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4885 for (; dyncon < dynconend; dyncon++)
4886 {
4887 Elf_Internal_Dyn dyn;
4888
4889 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4890
4891 }
4892
4893 }
4894 return TRUE;
4895 }
4896
4897 /* Finish up dynamic symbol handling. We set the contents of various
4898 dynamic sections here. */
4899
4900 static bfd_boolean
4901 bfin_finish_dynamic_symbol (bfd * output_bfd,
4902 struct bfd_link_info *info,
4903 struct elf_link_hash_entry *h,
4904 Elf_Internal_Sym * sym)
4905 {
4906 if (h->got.offset != (bfd_vma) - 1)
4907 {
4908 asection *sgot;
4909 asection *srela;
4910 Elf_Internal_Rela rela;
4911 bfd_byte *loc;
4912
4913 /* This symbol has an entry in the global offset table.
4914 Set it up. */
4915
4916 sgot = elf_hash_table (info)->sgot;
4917 srela = elf_hash_table (info)->srelgot;
4918 BFD_ASSERT (sgot != NULL && srela != NULL);
4919
4920 rela.r_offset = (sgot->output_section->vma
4921 + sgot->output_offset
4922 + (h->got.offset & ~(bfd_vma) 1));
4923
4924 /* If this is a -Bsymbolic link, and the symbol is defined
4925 locally, we just want to emit a RELATIVE reloc. Likewise if
4926 the symbol was forced to be local because of a version file.
4927 The entry in the global offset table will already have been
4928 initialized in the relocate_section function. */
4929 if (bfd_link_pic (info)
4930 && (info->symbolic
4931 || h->dynindx == -1 || h->forced_local) && h->def_regular)
4932 {
4933 _bfd_error_handler (_("*** check this relocation %s"),
4934 __FUNCTION__);
4935 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
4936 rela.r_addend = bfd_get_signed_32 (output_bfd,
4937 (sgot->contents
4938 +
4939 (h->got.
4940 offset & ~(bfd_vma) 1)));
4941 }
4942 else
4943 {
4944 bfd_put_32 (output_bfd, (bfd_vma) 0,
4945 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
4946 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
4947 rela.r_addend = 0;
4948 }
4949
4950 loc = srela->contents;
4951 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
4952 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4953 }
4954
4955 if (h->needs_copy)
4956 {
4957 BFD_ASSERT (0);
4958 }
4959 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4960 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
4961 || h == elf_hash_table (info)->hgot)
4962 sym->st_shndx = SHN_ABS;
4963
4964 return TRUE;
4965 }
4966
4967 /* Adjust a symbol defined by a dynamic object and referenced by a
4968 regular object. The current definition is in some section of the
4969 dynamic object, but we're not including those sections. We have to
4970 change the definition to something the rest of the link can
4971 understand. */
4972
4973 static bfd_boolean
4974 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
4975 struct elf_link_hash_entry *h)
4976 {
4977 bfd *dynobj;
4978 asection *s;
4979 unsigned int power_of_two;
4980
4981 dynobj = elf_hash_table (info)->dynobj;
4982
4983 /* Make sure we know what is going on here. */
4984 BFD_ASSERT (dynobj != NULL
4985 && (h->needs_plt
4986 || h->is_weakalias
4987 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
4988
4989 /* If this is a function, put it in the procedure linkage table. We
4990 will fill in the contents of the procedure linkage table later,
4991 when we know the address of the .got section. */
4992 if (h->type == STT_FUNC || h->needs_plt)
4993 {
4994 BFD_ASSERT(0);
4995 }
4996
4997 /* If this is a weak symbol, and there is a real definition, the
4998 processor independent code will have arranged for us to see the
4999 real definition first, and we can just use the same value. */
5000 if (h->is_weakalias)
5001 {
5002 struct elf_link_hash_entry *def = weakdef (h);
5003 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5004 h->root.u.def.section = def->root.u.def.section;
5005 h->root.u.def.value = def->root.u.def.value;
5006 return TRUE;
5007 }
5008
5009 /* This is a reference to a symbol defined by a dynamic object which
5010 is not a function. */
5011
5012 /* If we are creating a shared library, we must presume that the
5013 only references to the symbol are via the global offset table.
5014 For such cases we need not do anything here; the relocations will
5015 be handled correctly by relocate_section. */
5016 if (bfd_link_pic (info))
5017 return TRUE;
5018
5019 /* We must allocate the symbol in our .dynbss section, which will
5020 become part of the .bss section of the executable. There will be
5021 an entry for this symbol in the .dynsym section. The dynamic
5022 object will contain position independent code, so all references
5023 from the dynamic object to this symbol will go through the global
5024 offset table. The dynamic linker will use the .dynsym entry to
5025 determine the address it must put in the global offset table, so
5026 both the dynamic object and the regular object will refer to the
5027 same memory location for the variable. */
5028
5029 s = bfd_get_linker_section (dynobj, ".dynbss");
5030 BFD_ASSERT (s != NULL);
5031
5032 #if 0 /* Bfin does not currently have a COPY reloc. */
5033 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5034 copy the initial value out of the dynamic object and into the
5035 runtime process image. We need to remember the offset into the
5036 .rela.bss section we are going to use. */
5037 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5038 {
5039 asection *srel;
5040
5041 srel = bfd_get_linker_section (dynobj, ".rela.bss");
5042 BFD_ASSERT (srel != NULL);
5043 srel->size += sizeof (Elf32_External_Rela);
5044 h->needs_copy = 1;
5045 }
5046 #else
5047 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5048 {
5049 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations"));
5050 return FALSE;
5051 }
5052 #endif
5053 /* We need to figure out the alignment required for this symbol. I
5054 have no idea how ELF linkers handle this. */
5055 power_of_two = bfd_log2 (h->size);
5056 if (power_of_two > 3)
5057 power_of_two = 3;
5058
5059 /* Apply the required alignment. */
5060 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5061 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5062 {
5063 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5064 return FALSE;
5065 }
5066
5067 /* Define the symbol as being at this point in the section. */
5068 h->root.u.def.section = s;
5069 h->root.u.def.value = s->size;
5070
5071 /* Increment the section size to make room for the symbol. */
5072 s->size += h->size;
5073
5074 return TRUE;
5075 }
5076
5077 /* The bfin linker needs to keep track of the number of relocs that it
5078 decides to copy in check_relocs for each symbol. This is so that it
5079 can discard PC relative relocs if it doesn't need them when linking
5080 with -Bsymbolic. We store the information in a field extending the
5081 regular ELF linker hash table. */
5082
5083 /* This structure keeps track of the number of PC relative relocs we have
5084 copied for a given symbol. */
5085
5086 struct bfin_pcrel_relocs_copied
5087 {
5088 /* Next section. */
5089 struct bfin_pcrel_relocs_copied *next;
5090 /* A section in dynobj. */
5091 asection *section;
5092 /* Number of relocs copied in this section. */
5093 bfd_size_type count;
5094 };
5095
5096 /* This function is called via elf_link_hash_traverse if we are
5097 creating a shared object. In the -Bsymbolic case it discards the
5098 space allocated to copy PC relative relocs against symbols which
5099 are defined in regular objects. For the normal shared case, it
5100 discards space for pc-relative relocs that have become local due to
5101 symbol visibility changes. We allocated space for them in the
5102 check_relocs routine, but we won't fill them in in the
5103 relocate_section routine.
5104
5105 We also check whether any of the remaining relocations apply
5106 against a readonly section, and set the DF_TEXTREL flag in this
5107 case. */
5108
5109 static bfd_boolean
5110 bfin_discard_copies (struct elf_link_hash_entry *h, void * inf)
5111 {
5112 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5113 struct bfin_pcrel_relocs_copied *s;
5114
5115 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5116 {
5117 if ((info->flags & DF_TEXTREL) == 0)
5118 {
5119 /* Look for relocations against read-only sections. */
5120 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5121 s != NULL; s = s->next)
5122 if ((s->section->flags & SEC_READONLY) != 0)
5123 {
5124 info->flags |= DF_TEXTREL;
5125 break;
5126 }
5127 }
5128
5129 return TRUE;
5130 }
5131
5132 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5133 s != NULL; s = s->next)
5134 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5135
5136 return TRUE;
5137 }
5138
5139 static bfd_boolean
5140 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5141 struct bfd_link_info *info)
5142 {
5143 bfd *dynobj;
5144 asection *s;
5145 bfd_boolean relocs;
5146
5147 dynobj = elf_hash_table (info)->dynobj;
5148 BFD_ASSERT (dynobj != NULL);
5149
5150 if (elf_hash_table (info)->dynamic_sections_created)
5151 {
5152 /* Set the contents of the .interp section to the interpreter. */
5153 if (bfd_link_executable (info) && !info->nointerp)
5154 {
5155 s = bfd_get_linker_section (dynobj, ".interp");
5156 BFD_ASSERT (s != NULL);
5157 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5158 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5159 }
5160 }
5161 else
5162 {
5163 /* We may have created entries in the .rela.got section.
5164 However, if we are not creating the dynamic sections, we will
5165 not actually use these entries. Reset the size of .rela.got,
5166 which will cause it to get stripped from the output file
5167 below. */
5168 s = elf_hash_table (info)->srelgot;
5169 if (s != NULL)
5170 s->size = 0;
5171 }
5172
5173 /* If this is a -Bsymbolic shared link, then we need to discard all
5174 PC relative relocs against symbols defined in a regular object.
5175 For the normal shared case we discard the PC relative relocs
5176 against symbols that have become local due to visibility changes.
5177 We allocated space for them in the check_relocs routine, but we
5178 will not fill them in in the relocate_section routine. */
5179 if (bfd_link_pic (info))
5180 elf_link_hash_traverse (elf_hash_table (info),
5181 bfin_discard_copies, info);
5182
5183 /* The check_relocs and adjust_dynamic_symbol entry points have
5184 determined the sizes of the various dynamic sections. Allocate
5185 memory for them. */
5186 relocs = FALSE;
5187 for (s = dynobj->sections; s != NULL; s = s->next)
5188 {
5189 const char *name;
5190 bfd_boolean strip;
5191
5192 if ((s->flags & SEC_LINKER_CREATED) == 0)
5193 continue;
5194
5195 /* It's OK to base decisions on the section name, because none
5196 of the dynobj section names depend upon the input files. */
5197 name = bfd_get_section_name (dynobj, s);
5198
5199 strip = FALSE;
5200
5201 if (CONST_STRNEQ (name, ".rela"))
5202 {
5203 if (s->size == 0)
5204 {
5205 /* If we don't need this section, strip it from the
5206 output file. This is mostly to handle .rela.bss and
5207 .rela.plt. We must create both sections in
5208 create_dynamic_sections, because they must be created
5209 before the linker maps input sections to output
5210 sections. The linker does that before
5211 adjust_dynamic_symbol is called, and it is that
5212 function which decides whether anything needs to go
5213 into these sections. */
5214 strip = TRUE;
5215 }
5216 else
5217 {
5218 relocs = TRUE;
5219
5220 /* We use the reloc_count field as a counter if we need
5221 to copy relocs into the output file. */
5222 s->reloc_count = 0;
5223 }
5224 }
5225 else if (! CONST_STRNEQ (name, ".got"))
5226 {
5227 /* It's not one of our sections, so don't allocate space. */
5228 continue;
5229 }
5230
5231 if (strip)
5232 {
5233 s->flags |= SEC_EXCLUDE;
5234 continue;
5235 }
5236
5237 /* Allocate memory for the section contents. */
5238 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5239 Unused entries should be reclaimed before the section's contents
5240 are written out, but at the moment this does not happen. Thus in
5241 order to prevent writing out garbage, we initialise the section's
5242 contents to zero. */
5243 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5244 if (s->contents == NULL && s->size != 0)
5245 return FALSE;
5246 }
5247
5248 if (elf_hash_table (info)->dynamic_sections_created)
5249 {
5250 /* Add some entries to the .dynamic section. We fill in the
5251 values later, in bfin_finish_dynamic_sections, but we
5252 must add the entries now so that we get the correct size for
5253 the .dynamic section. The DT_DEBUG entry is filled in by the
5254 dynamic linker and used by the debugger. */
5255 #define add_dynamic_entry(TAG, VAL) \
5256 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5257
5258 if (!bfd_link_pic (info))
5259 {
5260 if (!add_dynamic_entry (DT_DEBUG, 0))
5261 return FALSE;
5262 }
5263
5264
5265 if (relocs)
5266 {
5267 if (!add_dynamic_entry (DT_RELA, 0)
5268 || !add_dynamic_entry (DT_RELASZ, 0)
5269 || !add_dynamic_entry (DT_RELAENT,
5270 sizeof (Elf32_External_Rela)))
5271 return FALSE;
5272 }
5273
5274 if ((info->flags & DF_TEXTREL) != 0)
5275 {
5276 if (!add_dynamic_entry (DT_TEXTREL, 0))
5277 return FALSE;
5278 }
5279 }
5280 #undef add_dynamic_entry
5281
5282 return TRUE;
5283 }
5284 \f
5285 /* Given a .data section and a .emreloc in-memory section, store
5286 relocation information into the .emreloc section which can be
5287 used at runtime to relocate the section. This is called by the
5288 linker when the --embedded-relocs switch is used. This is called
5289 after the add_symbols entry point has been called for all the
5290 objects, and before the final_link entry point is called. */
5291
5292 bfd_boolean
5293 bfd_bfin_elf32_create_embedded_relocs (bfd *abfd,
5294 struct bfd_link_info *info,
5295 asection *datasec,
5296 asection *relsec,
5297 char **errmsg)
5298 {
5299 Elf_Internal_Shdr *symtab_hdr;
5300 Elf_Internal_Sym *isymbuf = NULL;
5301 Elf_Internal_Rela *internal_relocs = NULL;
5302 Elf_Internal_Rela *irel, *irelend;
5303 bfd_byte *p;
5304 bfd_size_type amt;
5305
5306 BFD_ASSERT (! bfd_link_relocatable (info));
5307
5308 *errmsg = NULL;
5309
5310 if (datasec->reloc_count == 0)
5311 return TRUE;
5312
5313 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5314
5315 /* Get a copy of the native relocations. */
5316 internal_relocs = (_bfd_elf_link_read_relocs
5317 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
5318 info->keep_memory));
5319 if (internal_relocs == NULL)
5320 goto error_return;
5321
5322 amt = (bfd_size_type) datasec->reloc_count * 12;
5323 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5324 if (relsec->contents == NULL)
5325 goto error_return;
5326
5327 p = relsec->contents;
5328
5329 irelend = internal_relocs + datasec->reloc_count;
5330 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5331 {
5332 asection *targetsec;
5333
5334 /* We are going to write a four byte longword into the runtime
5335 reloc section. The longword will be the address in the data
5336 section which must be relocated. It is followed by the name
5337 of the target section NUL-padded or truncated to 8
5338 characters. */
5339
5340 /* We can only relocate absolute longword relocs at run time. */
5341 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5342 {
5343 *errmsg = _("unsupported reloc type");
5344 bfd_set_error (bfd_error_bad_value);
5345 goto error_return;
5346 }
5347
5348 /* Get the target section referred to by the reloc. */
5349 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5350 {
5351 /* A local symbol. */
5352 Elf_Internal_Sym *isym;
5353
5354 /* Read this BFD's local symbols if we haven't done so already. */
5355 if (isymbuf == NULL)
5356 {
5357 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5358 if (isymbuf == NULL)
5359 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5360 symtab_hdr->sh_info, 0,
5361 NULL, NULL, NULL);
5362 if (isymbuf == NULL)
5363 goto error_return;
5364 }
5365
5366 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5367 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5368 }
5369 else
5370 {
5371 unsigned long indx;
5372 struct elf_link_hash_entry *h;
5373
5374 /* An external symbol. */
5375 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5376 h = elf_sym_hashes (abfd)[indx];
5377 BFD_ASSERT (h != NULL);
5378 if (h->root.type == bfd_link_hash_defined
5379 || h->root.type == bfd_link_hash_defweak)
5380 targetsec = h->root.u.def.section;
5381 else
5382 targetsec = NULL;
5383 }
5384
5385 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5386 memset (p + 4, 0, 8);
5387 if (targetsec != NULL)
5388 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5389 }
5390
5391 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5392 free (isymbuf);
5393 if (internal_relocs != NULL
5394 && elf_section_data (datasec)->relocs != internal_relocs)
5395 free (internal_relocs);
5396 return TRUE;
5397
5398 error_return:
5399 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5400 free (isymbuf);
5401 if (internal_relocs != NULL
5402 && elf_section_data (datasec)->relocs != internal_relocs)
5403 free (internal_relocs);
5404 return FALSE;
5405 }
5406
5407 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5408 {
5409 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5410 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5411 { NULL, 0, 0, 0, 0 }
5412 };
5413
5414 \f
5415 #define TARGET_LITTLE_SYM bfin_elf32_vec
5416 #define TARGET_LITTLE_NAME "elf32-bfin"
5417 #define ELF_ARCH bfd_arch_bfin
5418 #define ELF_TARGET_ID BFIN_ELF_DATA
5419 #define ELF_MACHINE_CODE EM_BLACKFIN
5420 #define ELF_MAXPAGESIZE 0x1000
5421 #define elf_symbol_leading_char '_'
5422
5423 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5424 #define bfd_elf32_bfd_reloc_name_lookup \
5425 bfin_bfd_reloc_name_lookup
5426 #define elf_info_to_howto bfin_info_to_howto
5427 #define elf_info_to_howto_rel 0
5428 #define elf_backend_object_p elf32_bfin_object_p
5429
5430 #define bfd_elf32_bfd_is_local_label_name \
5431 bfin_is_local_label_name
5432 #define bfin_hash_table(p) \
5433 ((struct bfin_link_hash_table *) (p)->hash)
5434
5435
5436
5437 #define elf_backend_create_dynamic_sections \
5438 _bfd_elf_create_dynamic_sections
5439 #define bfd_elf32_bfd_link_hash_table_create \
5440 bfin_link_hash_table_create
5441 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5442
5443 #define elf_backend_check_relocs bfin_check_relocs
5444 #define elf_backend_adjust_dynamic_symbol \
5445 bfin_adjust_dynamic_symbol
5446 #define elf_backend_size_dynamic_sections \
5447 bfin_size_dynamic_sections
5448 #define elf_backend_relocate_section bfin_relocate_section
5449 #define elf_backend_finish_dynamic_symbol \
5450 bfin_finish_dynamic_symbol
5451 #define elf_backend_finish_dynamic_sections \
5452 bfin_finish_dynamic_sections
5453 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5454 #define bfd_elf32_bfd_merge_private_bfd_data \
5455 elf32_bfin_merge_private_bfd_data
5456 #define bfd_elf32_bfd_set_private_flags \
5457 elf32_bfin_set_private_flags
5458 #define bfd_elf32_bfd_print_private_bfd_data \
5459 elf32_bfin_print_private_bfd_data
5460 #define elf_backend_final_write_processing \
5461 elf32_bfin_final_write_processing
5462 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5463 #define elf_backend_stack_align 8
5464 #define elf_backend_can_gc_sections 1
5465 #define elf_backend_special_sections elf32_bfin_special_sections
5466 #define elf_backend_can_refcount 1
5467 #define elf_backend_want_got_plt 0
5468 #define elf_backend_plt_readonly 1
5469 #define elf_backend_want_plt_sym 0
5470 #define elf_backend_got_header_size 12
5471 #define elf_backend_rela_normal 1
5472
5473 #include "elf32-target.h"
5474
5475 #undef TARGET_LITTLE_SYM
5476 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5477 #undef TARGET_LITTLE_NAME
5478 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5479 #undef elf32_bed
5480 #define elf32_bed elf32_bfinfdpic_bed
5481
5482 #undef elf_backend_got_header_size
5483 #define elf_backend_got_header_size 0
5484
5485 #undef elf_backend_relocate_section
5486 #define elf_backend_relocate_section bfinfdpic_relocate_section
5487 #undef elf_backend_check_relocs
5488 #define elf_backend_check_relocs bfinfdpic_check_relocs
5489
5490 #undef bfd_elf32_bfd_link_hash_table_create
5491 #define bfd_elf32_bfd_link_hash_table_create \
5492 bfinfdpic_elf_link_hash_table_create
5493 #undef elf_backend_always_size_sections
5494 #define elf_backend_always_size_sections \
5495 elf32_bfinfdpic_always_size_sections
5496
5497 #undef elf_backend_create_dynamic_sections
5498 #define elf_backend_create_dynamic_sections \
5499 elf32_bfinfdpic_create_dynamic_sections
5500 #undef elf_backend_adjust_dynamic_symbol
5501 #define elf_backend_adjust_dynamic_symbol \
5502 elf32_bfinfdpic_adjust_dynamic_symbol
5503 #undef elf_backend_size_dynamic_sections
5504 #define elf_backend_size_dynamic_sections \
5505 elf32_bfinfdpic_size_dynamic_sections
5506 #undef elf_backend_finish_dynamic_symbol
5507 #define elf_backend_finish_dynamic_symbol \
5508 elf32_bfinfdpic_finish_dynamic_symbol
5509 #undef elf_backend_finish_dynamic_sections
5510 #define elf_backend_finish_dynamic_sections \
5511 elf32_bfinfdpic_finish_dynamic_sections
5512
5513 #undef elf_backend_discard_info
5514 #define elf_backend_discard_info \
5515 bfinfdpic_elf_discard_info
5516 #undef elf_backend_can_make_relative_eh_frame
5517 #define elf_backend_can_make_relative_eh_frame \
5518 bfinfdpic_elf_use_relative_eh_frame
5519 #undef elf_backend_can_make_lsda_relative_eh_frame
5520 #define elf_backend_can_make_lsda_relative_eh_frame \
5521 bfinfdpic_elf_use_relative_eh_frame
5522 #undef elf_backend_encode_eh_address
5523 #define elf_backend_encode_eh_address \
5524 bfinfdpic_elf_encode_eh_address
5525
5526 #undef elf_backend_may_use_rel_p
5527 #define elf_backend_may_use_rel_p 1
5528 #undef elf_backend_may_use_rela_p
5529 #define elf_backend_may_use_rela_p 1
5530 /* We use REL for dynamic relocations only. */
5531 #undef elf_backend_default_use_rela_p
5532 #define elf_backend_default_use_rela_p 1
5533
5534 #undef elf_backend_omit_section_dynsym
5535 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5536
5537 #include "elf32-target.h"
GDB Binutils - Deliverables
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