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* elf32-bfin.c (_bfin_create_got_section): Don't generate a _gp
[deliverable/binutils-gdb.git] / bfd / elf32-bfin.c
1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006 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 2 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, MA 02110-1301,
19 USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/bfin.h"
26 #include "elf/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 PTR 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 PTR 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 fprintf(stderr, "relocation should be even number\n");
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 PTR 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 PTR 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 PTR 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 == TRUE)
333 {
334 relocation -= input_section->output_section->vma + input_section->output_offset;
335
336 if (howto->pcrel_offset == TRUE)
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 fprintf(stderr, "relocation should be even number\n");
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_unused0, /* type. */
425 0, /* rightshift. */
426 2, /* size (0 = byte, 1 = short, 2 = long). */
427 32, /* bitsize. */
428 FALSE, /* pc_relative. */
429 0, /* bitpos. */
430 complain_overflow_bitfield, /* complain_on_overflow. */
431 bfd_elf_generic_reloc, /* special_function. */
432 "R_unused0", /* name. */
433 FALSE, /* partial_inplace. */
434 0, /* src_mask. */
435 0, /* dst_mask. */
436 FALSE), /* pcrel_offset. */
437
438 HOWTO (R_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_pcrel5m2", /* name. */
447 FALSE, /* partial_inplace. */
448 0, /* src_mask. */
449 0x0000000F, /* dst_mask. */
450 FALSE), /* pcrel_offset. */
451
452 HOWTO (R_unused1, /* type. */
453 0, /* rightshift. */
454 2, /* size (0 = byte, 1 = short, 2 = long). */
455 32, /* bitsize. */
456 FALSE, /* pc_relative. */
457 0, /* bitpos. */
458 complain_overflow_bitfield, /* complain_on_overflow. */
459 bfd_elf_generic_reloc, /* special_function. */
460 "R_unused1", /* name. */
461 FALSE, /* partial_inplace. */
462 0, /* src_mask. */
463 0, /* dst_mask. */
464 FALSE), /* pcrel_offset. */
465
466 HOWTO (R_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_pcrel10", /* name. */
475 FALSE, /* partial_inplace. */
476 0, /* src_mask. */
477 0x000003FF, /* dst_mask. */
478 TRUE), /* pcrel_offset. */
479
480 HOWTO (R_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_pcrel12_jump", /* name. */
493 FALSE, /* partial_inplace. */
494 0, /* src_mask. */
495 0x0FFF, /* dst_mask. */
496 TRUE), /* pcrel_offset. */
497
498 HOWTO (R_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_rimm16", /* name. */
507 FALSE, /* partial_inplace. */
508 0, /* src_mask. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE), /* pcrel_offset. */
511
512 HOWTO (R_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_luimm16", /* name. */
521 FALSE, /* partial_inplace. */
522 0, /* src_mask. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE), /* pcrel_offset. */
525
526 HOWTO (R_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_huimm16", /* name. */
535 FALSE, /* partial_inplace. */
536 0, /* src_mask. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE), /* pcrel_offset. */
539
540 HOWTO (R_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_pcrel12_jump_s", /* name. */
549 FALSE, /* partial_inplace. */
550 0, /* src_mask. */
551 0x00000FFF, /* dst_mask. */
552 TRUE), /* pcrel_offset. */
553
554 HOWTO (R_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_pcrel24_jump_x", /* name. */
563 FALSE, /* partial_inplace. */
564 0, /* src_mask. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE), /* pcrel_offset. */
567
568 HOWTO (R_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_pcrel24", /* name. */
577 FALSE, /* partial_inplace. */
578 0, /* src_mask. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE), /* pcrel_offset. */
581
582 HOWTO (R_unusedb, /* type. */
583 0, /* rightshift. */
584 2, /* size (0 = byte, 1 = short, 2 = long). */
585 32, /* bitsize. */
586 FALSE, /* pc_relative. */
587 0, /* bitpos. */
588 complain_overflow_dont, /* complain_on_overflow. */
589 bfd_elf_generic_reloc, /* special_function. */
590 "R_unusedb", /* name. */
591 FALSE, /* partial_inplace. */
592 0, /* src_mask. */
593 0, /* dst_mask. */
594 FALSE), /* pcrel_offset. */
595
596 HOWTO (R_unusedc, /* type. */
597 0, /* rightshift. */
598 2, /* size (0 = byte, 1 = short, 2 = long). */
599 32, /* bitsize. */
600 FALSE, /* pc_relative. */
601 0, /* bitpos. */
602 complain_overflow_dont, /* complain_on_overflow. */
603 bfd_elf_generic_reloc, /* special_function. */
604 "R_unusedc", /* name. */
605 FALSE, /* partial_inplace. */
606 0, /* src_mask. */
607 0, /* dst_mask. */
608 FALSE), /* pcrel_offset. */
609
610 HOWTO (R_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_pcrel24_jump_l", /* name. */
619 FALSE, /* partial_inplace. */
620 0, /* src_mask. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE), /* pcrel_offset. */
623
624 HOWTO (R_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_pcrel24_call_x", /* name. */
633 FALSE, /* partial_inplace. */
634 0, /* src_mask. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE), /* pcrel_offset. */
637
638 HOWTO (R_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_var_eq_symb", /* name. */
647 FALSE, /* partial_inplace. */
648 0, /* src_mask. */
649 0, /* dst_mask. */
650 FALSE), /* pcrel_offset. */
651
652 HOWTO (R_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_byte_data", /* name. */
661 FALSE, /* partial_inplace. */
662 0, /* src_mask. */
663 0xFF, /* dst_mask. */
664 TRUE), /* pcrel_offset. */
665
666 HOWTO (R_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_byte2_data", /* name. */
675 FALSE, /* partial_inplace. */
676 0, /* src_mask. */
677 0xFFFF, /* dst_mask. */
678 TRUE), /* pcrel_offset. */
679
680 HOWTO (R_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_byte4_data", /* name. */
689 FALSE, /* partial_inplace. */
690 0, /* src_mask. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE), /* pcrel_offset. */
693
694 HOWTO (R_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_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_GOT12", /* 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_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_pltpc", /* name. */
943 FALSE, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE), /* pcrel_offset. */
947
948 HOWTO (R_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_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_unused0 },
1002 { BFD_RELOC_BFIN_5_PCREL, R_pcrel5m2 },
1003 { BFD_RELOC_NONE, R_unused1 },
1004 { BFD_RELOC_BFIN_10_PCREL, R_pcrel10 },
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_pcrel12_jump },
1006 { BFD_RELOC_BFIN_16_IMM, R_rimm16 },
1007 { BFD_RELOC_BFIN_16_LOW, R_luimm16 },
1008 { BFD_RELOC_BFIN_16_HIGH, R_huimm16 },
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_pcrel12_jump_s },
1010 { BFD_RELOC_24_PCREL, R_pcrel24 },
1011 { BFD_RELOC_24_PCREL, R_pcrel24 },
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_pcrel24_jump_l },
1013 { BFD_RELOC_NONE, R_unusedb },
1014 { BFD_RELOC_NONE, R_unusedc },
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_pcrel24_call_x },
1016 { BFD_RELOC_8, R_byte_data },
1017 { BFD_RELOC_16, R_byte2_data },
1018 { BFD_RELOC_32, R_byte4_data },
1019 { BFD_RELOC_BFIN_11_PCREL, R_pcrel11 },
1020 { BFD_RELOC_BFIN_GOT, R_got },
1021 { BFD_RELOC_BFIN_PLTPC, R_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 = BFIN_RELOC_MIN;
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 && r_type > BFIN_RELOC_MIN)
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 /* Given a bfin relocation type, return the howto. */
1084 static reloc_howto_type *
1085 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1086 unsigned int r_type)
1087 {
1088 if (r_type <= BFIN_RELOC_MAX)
1089 return &bfin_howto_table [r_type];
1090
1091 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1092 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1093
1094 return (reloc_howto_type *) NULL;
1095
1096 }
1097
1098 /* Return TRUE if the name is a local label.
1099 bfin local labels begin with L$. */
1100 static bfd_boolean
1101 bfin_is_local_label_name (
1102 bfd *abfd ATTRIBUTE_UNUSED,
1103 const char *label)
1104 {
1105 if (label[0] == 'L' && label[1] == '$' )
1106 return TRUE;
1107
1108 return _bfd_elf_is_local_label_name (abfd, label);
1109 }
1110
1111 extern const bfd_target bfd_elf32_bfinfdpic_vec;
1112 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1113
1114 /* An extension of the elf hash table data structure, containing some
1115 additional Blackfin-specific data. */
1116 struct bfinfdpic_elf_link_hash_table
1117 {
1118 struct elf_link_hash_table elf;
1119
1120 /* A pointer to the .got section. */
1121 asection *sgot;
1122 /* A pointer to the .rel.got section. */
1123 asection *sgotrel;
1124 /* A pointer to the .rofixup section. */
1125 asection *sgotfixup;
1126 /* A pointer to the .plt section. */
1127 asection *splt;
1128 /* A pointer to the .rel.plt section. */
1129 asection *spltrel;
1130 /* GOT base offset. */
1131 bfd_vma got0;
1132 /* Location of the first non-lazy PLT entry, i.e., the number of
1133 bytes taken by lazy PLT entries. */
1134 bfd_vma plt0;
1135 /* A hash table holding information about which symbols were
1136 referenced with which PIC-related relocations. */
1137 struct htab *relocs_info;
1138 };
1139
1140 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1141
1142 #define bfinfdpic_hash_table(info) \
1143 ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
1144
1145 #define bfinfdpic_got_section(info) \
1146 (bfinfdpic_hash_table (info)->sgot)
1147 #define bfinfdpic_gotrel_section(info) \
1148 (bfinfdpic_hash_table (info)->sgotrel)
1149 #define bfinfdpic_gotfixup_section(info) \
1150 (bfinfdpic_hash_table (info)->sgotfixup)
1151 #define bfinfdpic_plt_section(info) \
1152 (bfinfdpic_hash_table (info)->splt)
1153 #define bfinfdpic_pltrel_section(info) \
1154 (bfinfdpic_hash_table (info)->spltrel)
1155 #define bfinfdpic_relocs_info(info) \
1156 (bfinfdpic_hash_table (info)->relocs_info)
1157 #define bfinfdpic_got_initial_offset(info) \
1158 (bfinfdpic_hash_table (info)->got0)
1159 #define bfinfdpic_plt_initial_offset(info) \
1160 (bfinfdpic_hash_table (info)->plt0)
1161
1162 /* Create a Blackfin ELF linker hash table. */
1163
1164 static struct bfd_link_hash_table *
1165 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1166 {
1167 struct bfinfdpic_elf_link_hash_table *ret;
1168 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1169
1170 ret = bfd_zalloc (abfd, amt);
1171 if (ret == NULL)
1172 return NULL;
1173
1174 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1175 _bfd_elf_link_hash_newfunc,
1176 sizeof (struct elf_link_hash_entry)))
1177 {
1178 free (ret);
1179 return NULL;
1180 }
1181
1182 return &ret->elf.root;
1183 }
1184
1185 /* Decide whether a reference to a symbol can be resolved locally or
1186 not. If the symbol is protected, we want the local address, but
1187 its function descriptor must be assigned by the dynamic linker. */
1188 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1189 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1190 || ! elf_hash_table (INFO)->dynamic_sections_created)
1191 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1192 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1193
1194 /* This structure collects information on what kind of GOT, PLT or
1195 function descriptors are required by relocations that reference a
1196 certain symbol. */
1197 struct bfinfdpic_relocs_info
1198 {
1199 /* The index of the symbol, as stored in the relocation r_info, if
1200 we have a local symbol; -1 otherwise. */
1201 long symndx;
1202 union
1203 {
1204 /* The input bfd in which the symbol is defined, if it's a local
1205 symbol. */
1206 bfd *abfd;
1207 /* If symndx == -1, the hash table entry corresponding to a global
1208 symbol (even if it turns out to bind locally, in which case it
1209 should ideally be replaced with section's symndx + addend). */
1210 struct elf_link_hash_entry *h;
1211 } d;
1212 /* The addend of the relocation that references the symbol. */
1213 bfd_vma addend;
1214
1215 /* The fields above are used to identify an entry. The fields below
1216 contain information on how an entry is used and, later on, which
1217 locations it was assigned. */
1218 /* The following 2 fields record whether the symbol+addend above was
1219 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1220 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1221 unsigned got17m4:1;
1222 unsigned gothilo:1;
1223 /* Whether a FUNCDESC relocation references symbol+addend. */
1224 unsigned fd:1;
1225 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1226 unsigned fdgot17m4:1;
1227 unsigned fdgothilo:1;
1228 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1229 unsigned fdgoff17m4:1;
1230 unsigned fdgoffhilo:1;
1231 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1232 GOTOFFHI relocations. The addend doesn't really matter, since we
1233 envision that this will only be used to check whether the symbol
1234 is mapped to the same segment as the got. */
1235 unsigned gotoff:1;
1236 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1237 unsigned call:1;
1238 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1239 relocation. */
1240 unsigned sym:1;
1241 /* Whether we need a PLT entry for a symbol. Should be implied by
1242 something like:
1243 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1244 unsigned plt:1;
1245 /* Whether a function descriptor should be created in this link unit
1246 for symbol+addend. Should be implied by something like:
1247 (plt || fdgotoff17m4 || fdgotofflohi
1248 || ((fd || fdgot17m4 || fdgothilo)
1249 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1250 unsigned privfd:1;
1251 /* Whether a lazy PLT entry is needed for this symbol+addend.
1252 Should be implied by something like:
1253 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1254 && ! (info->flags & DF_BIND_NOW)) */
1255 unsigned lazyplt:1;
1256 /* Whether we've already emitted GOT relocations and PLT entries as
1257 needed for this symbol. */
1258 unsigned done:1;
1259
1260 /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1261 relocations referencing the symbol. */
1262 unsigned relocs32, relocsfd, relocsfdv;
1263
1264 /* The number of .rofixups entries and dynamic relocations allocated
1265 for this symbol, minus any that might have already been used. */
1266 unsigned fixups, dynrelocs;
1267
1268 /* The offsets of the GOT entries assigned to symbol+addend, to the
1269 function descriptor's address, and to a function descriptor,
1270 respectively. Should be zero if unassigned. The offsets are
1271 counted from the value that will be assigned to the PIC register,
1272 not from the beginning of the .got section. */
1273 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1274 /* The offsets of the PLT entries assigned to symbol+addend,
1275 non-lazy and lazy, respectively. If unassigned, should be
1276 (bfd_vma)-1. */
1277 bfd_vma plt_entry, lzplt_entry;
1278 };
1279
1280 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1281 static hashval_t
1282 bfinfdpic_relocs_info_hash (const void *entry_)
1283 {
1284 const struct bfinfdpic_relocs_info *entry = entry_;
1285
1286 return (entry->symndx == -1
1287 ? entry->d.h->root.root.hash
1288 : entry->symndx + entry->d.abfd->id * 257) + entry->addend;
1289 }
1290
1291 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1292 identical. */
1293 static int
1294 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1295 {
1296 const struct bfinfdpic_relocs_info *e1 = entry1;
1297 const struct bfinfdpic_relocs_info *e2 = entry2;
1298
1299 return e1->symndx == e2->symndx && e1->addend == e2->addend
1300 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1301 }
1302
1303 /* Find or create an entry in a hash table HT that matches the key
1304 fields of the given ENTRY. If it's not found, memory for a new
1305 entry is allocated in ABFD's obstack. */
1306 static struct bfinfdpic_relocs_info *
1307 bfinfdpic_relocs_info_find (struct htab *ht,
1308 bfd *abfd,
1309 const struct bfinfdpic_relocs_info *entry,
1310 enum insert_option insert)
1311 {
1312 struct bfinfdpic_relocs_info **loc =
1313 (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1314
1315 if (! loc)
1316 return NULL;
1317
1318 if (*loc)
1319 return *loc;
1320
1321 *loc = bfd_zalloc (abfd, sizeof (**loc));
1322
1323 if (! *loc)
1324 return *loc;
1325
1326 (*loc)->symndx = entry->symndx;
1327 (*loc)->d = entry->d;
1328 (*loc)->addend = entry->addend;
1329 (*loc)->plt_entry = (bfd_vma)-1;
1330 (*loc)->lzplt_entry = (bfd_vma)-1;
1331
1332 return *loc;
1333 }
1334
1335 /* Obtain the address of the entry in HT associated with H's symbol +
1336 addend, creating a new entry if none existed. ABFD is only used
1337 for memory allocation purposes. */
1338 inline static struct bfinfdpic_relocs_info *
1339 bfinfdpic_relocs_info_for_global (struct htab *ht,
1340 bfd *abfd,
1341 struct elf_link_hash_entry *h,
1342 bfd_vma addend,
1343 enum insert_option insert)
1344 {
1345 struct bfinfdpic_relocs_info entry;
1346
1347 entry.symndx = -1;
1348 entry.d.h = h;
1349 entry.addend = addend;
1350
1351 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1352 }
1353
1354 /* Obtain the address of the entry in HT associated with the SYMNDXth
1355 local symbol of the input bfd ABFD, plus the addend, creating a new
1356 entry if none existed. */
1357 inline static struct bfinfdpic_relocs_info *
1358 bfinfdpic_relocs_info_for_local (struct htab *ht,
1359 bfd *abfd,
1360 long symndx,
1361 bfd_vma addend,
1362 enum insert_option insert)
1363 {
1364 struct bfinfdpic_relocs_info entry;
1365
1366 entry.symndx = symndx;
1367 entry.d.abfd = abfd;
1368 entry.addend = addend;
1369
1370 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1371 }
1372
1373 /* Merge fields set by check_relocs() of two entries that end up being
1374 mapped to the same (presumably global) symbol. */
1375
1376 inline static void
1377 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
1378 struct bfinfdpic_relocs_info const *e1)
1379 {
1380 e2->got17m4 |= e1->got17m4;
1381 e2->gothilo |= e1->gothilo;
1382 e2->fd |= e1->fd;
1383 e2->fdgot17m4 |= e1->fdgot17m4;
1384 e2->fdgothilo |= e1->fdgothilo;
1385 e2->fdgoff17m4 |= e1->fdgoff17m4;
1386 e2->fdgoffhilo |= e1->fdgoffhilo;
1387 e2->gotoff |= e1->gotoff;
1388 e2->call |= e1->call;
1389 e2->sym |= e1->sym;
1390 }
1391
1392 /* Every block of 65535 lazy PLT entries shares a single call to the
1393 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1394 32767, counting from 0). All other lazy PLT entries branch to it
1395 in a single instruction. */
1396
1397 #define LZPLT_RESOLVER_EXTRA 10
1398 #define LZPLT_NORMAL_SIZE 6
1399 #define LZPLT_ENTRIES 1362
1400
1401 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1402 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1403
1404 /* Add a dynamic relocation to the SRELOC section. */
1405
1406 inline static bfd_vma
1407 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
1408 int reloc_type, long dynindx, bfd_vma addend,
1409 struct bfinfdpic_relocs_info *entry)
1410 {
1411 Elf_Internal_Rela outrel;
1412 bfd_vma reloc_offset;
1413
1414 outrel.r_offset = offset;
1415 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
1416 outrel.r_addend = addend;
1417
1418 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
1419 BFD_ASSERT (reloc_offset < sreloc->size);
1420 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1421 sreloc->contents + reloc_offset);
1422 sreloc->reloc_count++;
1423
1424 /* If the entry's index is zero, this relocation was probably to a
1425 linkonce section that got discarded. We reserved a dynamic
1426 relocation, but it was for another entry than the one we got at
1427 the time of emitting the relocation. Unfortunately there's no
1428 simple way for us to catch this situation, since the relocation
1429 is cleared right before calling relocate_section, at which point
1430 we no longer know what the relocation used to point to. */
1431 if (entry->symndx)
1432 {
1433 BFD_ASSERT (entry->dynrelocs > 0);
1434 entry->dynrelocs--;
1435 }
1436
1437 return reloc_offset;
1438 }
1439
1440 /* Add a fixup to the ROFIXUP section. */
1441
1442 static bfd_vma
1443 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
1444 struct bfinfdpic_relocs_info *entry)
1445 {
1446 bfd_vma fixup_offset;
1447
1448 if (rofixup->flags & SEC_EXCLUDE)
1449 return -1;
1450
1451 fixup_offset = rofixup->reloc_count * 4;
1452 if (rofixup->contents)
1453 {
1454 BFD_ASSERT (fixup_offset < rofixup->size);
1455 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
1456 }
1457 rofixup->reloc_count++;
1458
1459 if (entry && entry->symndx)
1460 {
1461 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
1462 above. */
1463 BFD_ASSERT (entry->fixups > 0);
1464 entry->fixups--;
1465 }
1466
1467 return fixup_offset;
1468 }
1469
1470 /* Find the segment number in which OSEC, and output section, is
1471 located. */
1472
1473 static unsigned
1474 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
1475 {
1476 struct elf_segment_map *m;
1477 Elf_Internal_Phdr *p;
1478
1479 /* Find the segment that contains the output_section. */
1480 for (m = elf_tdata (output_bfd)->segment_map,
1481 p = elf_tdata (output_bfd)->phdr;
1482 m != NULL;
1483 m = m->next, p++)
1484 {
1485 int i;
1486
1487 for (i = m->count - 1; i >= 0; i--)
1488 if (m->sections[i] == osec)
1489 break;
1490
1491 if (i >= 0)
1492 break;
1493 }
1494
1495 return p - elf_tdata (output_bfd)->phdr;
1496 }
1497
1498 inline static bfd_boolean
1499 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
1500 {
1501 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
1502
1503 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
1504 }
1505
1506 /* Generate relocations for GOT entries, function descriptors, and
1507 code for PLT and lazy PLT entries. */
1508
1509 inline static bfd_boolean
1510 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
1511 bfd *output_bfd,
1512 struct bfd_link_info *info,
1513 asection *sec,
1514 Elf_Internal_Sym *sym,
1515 bfd_vma addend)
1516
1517 {
1518 bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
1519 int dynindx = -1;
1520
1521 if (entry->done)
1522 return TRUE;
1523 entry->done = 1;
1524
1525 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
1526 {
1527 /* If the symbol is dynamic, consider it for dynamic
1528 relocations, otherwise decay to section + offset. */
1529 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
1530 dynindx = entry->d.h->dynindx;
1531 else
1532 {
1533 if (sec->output_section
1534 && ! bfd_is_abs_section (sec->output_section)
1535 && ! bfd_is_und_section (sec->output_section))
1536 dynindx = elf_section_data (sec->output_section)->dynindx;
1537 else
1538 dynindx = 0;
1539 }
1540 }
1541
1542 /* Generate relocation for GOT entry pointing to the symbol. */
1543 if (entry->got_entry)
1544 {
1545 int idx = dynindx;
1546 bfd_vma ad = addend;
1547
1548 /* If the symbol is dynamic but binds locally, use
1549 section+offset. */
1550 if (sec && (entry->symndx != -1
1551 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1552 {
1553 if (entry->symndx == -1)
1554 ad += entry->d.h->root.u.def.value;
1555 else
1556 ad += sym->st_value;
1557 ad += sec->output_offset;
1558 if (sec->output_section && elf_section_data (sec->output_section))
1559 idx = elf_section_data (sec->output_section)->dynindx;
1560 else
1561 idx = 0;
1562 }
1563
1564 /* If we're linking an executable at a fixed address, we can
1565 omit the dynamic relocation as long as the symbol is local to
1566 this module. */
1567 if (info->executable && !info->pie
1568 && (entry->symndx != -1
1569 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1570 {
1571 if (sec)
1572 ad += sec->output_section->vma;
1573 if (entry->symndx != -1
1574 || entry->d.h->root.type != bfd_link_hash_undefweak)
1575 _bfinfdpic_add_rofixup (output_bfd,
1576 bfinfdpic_gotfixup_section (info),
1577 bfinfdpic_got_section (info)->output_section
1578 ->vma
1579 + bfinfdpic_got_section (info)->output_offset
1580 + bfinfdpic_got_initial_offset (info)
1581 + entry->got_entry, entry);
1582 }
1583 else
1584 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
1585 _bfd_elf_section_offset
1586 (output_bfd, info,
1587 bfinfdpic_got_section (info),
1588 bfinfdpic_got_initial_offset (info)
1589 + entry->got_entry)
1590 + bfinfdpic_got_section (info)
1591 ->output_section->vma
1592 + bfinfdpic_got_section (info)->output_offset,
1593 R_byte4_data, idx, ad, entry);
1594
1595 bfd_put_32 (output_bfd, ad,
1596 bfinfdpic_got_section (info)->contents
1597 + bfinfdpic_got_initial_offset (info)
1598 + entry->got_entry);
1599 }
1600
1601 /* Generate relocation for GOT entry pointing to a canonical
1602 function descriptor. */
1603 if (entry->fdgot_entry)
1604 {
1605 int reloc, idx;
1606 bfd_vma ad = 0;
1607
1608 if (! (entry->symndx == -1
1609 && entry->d.h->root.type == bfd_link_hash_undefweak
1610 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1611 {
1612 /* If the symbol is dynamic and there may be dynamic symbol
1613 resolution because we are, or are linked with, a shared
1614 library, emit a FUNCDESC relocation such that the dynamic
1615 linker will allocate the function descriptor. If the
1616 symbol needs a non-local function descriptor but binds
1617 locally (e.g., its visibility is protected, emit a
1618 dynamic relocation decayed to section+offset. */
1619 if (entry->symndx == -1
1620 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
1621 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
1622 && !(info->executable && !info->pie))
1623 {
1624 reloc = R_BFIN_FUNCDESC;
1625 idx = elf_section_data (entry->d.h->root.u.def.section
1626 ->output_section)->dynindx;
1627 ad = entry->d.h->root.u.def.section->output_offset
1628 + entry->d.h->root.u.def.value;
1629 }
1630 else if (entry->symndx == -1
1631 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
1632 {
1633 reloc = R_BFIN_FUNCDESC;
1634 idx = dynindx;
1635 ad = addend;
1636 if (ad)
1637 return FALSE;
1638 }
1639 else
1640 {
1641 /* Otherwise, we know we have a private function descriptor,
1642 so reference it directly. */
1643 if (elf_hash_table (info)->dynamic_sections_created)
1644 BFD_ASSERT (entry->privfd);
1645 reloc = R_byte4_data;
1646 idx = elf_section_data (bfinfdpic_got_section (info)
1647 ->output_section)->dynindx;
1648 ad = bfinfdpic_got_section (info)->output_offset
1649 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
1650 }
1651
1652 /* If there is room for dynamic symbol resolution, emit the
1653 dynamic relocation. However, if we're linking an
1654 executable at a fixed location, we won't have emitted a
1655 dynamic symbol entry for the got section, so idx will be
1656 zero, which means we can and should compute the address
1657 of the private descriptor ourselves. */
1658 if (info->executable && !info->pie
1659 && (entry->symndx != -1
1660 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
1661 {
1662 ad += bfinfdpic_got_section (info)->output_section->vma;
1663 _bfinfdpic_add_rofixup (output_bfd,
1664 bfinfdpic_gotfixup_section (info),
1665 bfinfdpic_got_section (info)
1666 ->output_section->vma
1667 + bfinfdpic_got_section (info)
1668 ->output_offset
1669 + bfinfdpic_got_initial_offset (info)
1670 + entry->fdgot_entry, entry);
1671 }
1672 else
1673 _bfinfdpic_add_dyn_reloc (output_bfd,
1674 bfinfdpic_gotrel_section (info),
1675 _bfd_elf_section_offset
1676 (output_bfd, info,
1677 bfinfdpic_got_section (info),
1678 bfinfdpic_got_initial_offset (info)
1679 + entry->fdgot_entry)
1680 + bfinfdpic_got_section (info)
1681 ->output_section->vma
1682 + bfinfdpic_got_section (info)
1683 ->output_offset,
1684 reloc, idx, ad, entry);
1685 }
1686
1687 bfd_put_32 (output_bfd, ad,
1688 bfinfdpic_got_section (info)->contents
1689 + bfinfdpic_got_initial_offset (info)
1690 + entry->fdgot_entry);
1691 }
1692
1693 /* Generate relocation to fill in a private function descriptor in
1694 the GOT. */
1695 if (entry->fd_entry)
1696 {
1697 int idx = dynindx;
1698 bfd_vma ad = addend;
1699 bfd_vma ofst;
1700 long lowword, highword;
1701
1702 /* If the symbol is dynamic but binds locally, use
1703 section+offset. */
1704 if (sec && (entry->symndx != -1
1705 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1706 {
1707 if (entry->symndx == -1)
1708 ad += entry->d.h->root.u.def.value;
1709 else
1710 ad += sym->st_value;
1711 ad += sec->output_offset;
1712 if (sec->output_section && elf_section_data (sec->output_section))
1713 idx = elf_section_data (sec->output_section)->dynindx;
1714 else
1715 idx = 0;
1716 }
1717
1718 /* If we're linking an executable at a fixed address, we can
1719 omit the dynamic relocation as long as the symbol is local to
1720 this module. */
1721 if (info->executable && !info->pie
1722 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1723 {
1724 if (sec)
1725 ad += sec->output_section->vma;
1726 ofst = 0;
1727 if (entry->symndx != -1
1728 || entry->d.h->root.type != bfd_link_hash_undefweak)
1729 {
1730 _bfinfdpic_add_rofixup (output_bfd,
1731 bfinfdpic_gotfixup_section (info),
1732 bfinfdpic_got_section (info)
1733 ->output_section->vma
1734 + bfinfdpic_got_section (info)
1735 ->output_offset
1736 + bfinfdpic_got_initial_offset (info)
1737 + entry->fd_entry, entry);
1738 _bfinfdpic_add_rofixup (output_bfd,
1739 bfinfdpic_gotfixup_section (info),
1740 bfinfdpic_got_section (info)
1741 ->output_section->vma
1742 + bfinfdpic_got_section (info)
1743 ->output_offset
1744 + bfinfdpic_got_initial_offset (info)
1745 + entry->fd_entry + 4, entry);
1746 }
1747 }
1748 else
1749 {
1750 ofst
1751 = _bfinfdpic_add_dyn_reloc (output_bfd,
1752 entry->lazyplt
1753 ? bfinfdpic_pltrel_section (info)
1754 : bfinfdpic_gotrel_section (info),
1755 _bfd_elf_section_offset
1756 (output_bfd, info,
1757 bfinfdpic_got_section (info),
1758 bfinfdpic_got_initial_offset (info)
1759 + entry->fd_entry)
1760 + bfinfdpic_got_section (info)
1761 ->output_section->vma
1762 + bfinfdpic_got_section (info)
1763 ->output_offset,
1764 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
1765 }
1766
1767 /* If we've omitted the dynamic relocation, just emit the fixed
1768 addresses of the symbol and of the local GOT base offset. */
1769 if (info->executable && !info->pie && sec && sec->output_section)
1770 {
1771 lowword = ad;
1772 highword = bfinfdpic_got_section (info)->output_section->vma
1773 + bfinfdpic_got_section (info)->output_offset
1774 + bfinfdpic_got_initial_offset (info);
1775 }
1776 else if (entry->lazyplt)
1777 {
1778 if (ad)
1779 return FALSE;
1780
1781 fd_lazy_rel_offset = ofst;
1782
1783 /* A function descriptor used for lazy or local resolving is
1784 initialized such that its high word contains the output
1785 section index in which the PLT entries are located, and
1786 the low word contains the address of the lazy PLT entry
1787 entry point, that must be within the memory region
1788 assigned to that section. */
1789 lowword = entry->lzplt_entry + 4
1790 + bfinfdpic_plt_section (info)->output_offset
1791 + bfinfdpic_plt_section (info)->output_section->vma;
1792 highword = _bfinfdpic_osec_to_segment
1793 (output_bfd, bfinfdpic_plt_section (info)->output_section);
1794 }
1795 else
1796 {
1797 /* A function descriptor for a local function gets the index
1798 of the section. For a non-local function, it's
1799 disregarded. */
1800 lowword = ad;
1801 if (entry->symndx == -1 && entry->d.h->dynindx != -1
1802 && entry->d.h->dynindx == idx)
1803 highword = 0;
1804 else
1805 highword = _bfinfdpic_osec_to_segment
1806 (output_bfd, sec->output_section);
1807 }
1808
1809 bfd_put_32 (output_bfd, lowword,
1810 bfinfdpic_got_section (info)->contents
1811 + bfinfdpic_got_initial_offset (info)
1812 + entry->fd_entry);
1813 bfd_put_32 (output_bfd, highword,
1814 bfinfdpic_got_section (info)->contents
1815 + bfinfdpic_got_initial_offset (info)
1816 + entry->fd_entry + 4);
1817 }
1818
1819 /* Generate code for the PLT entry. */
1820 if (entry->plt_entry != (bfd_vma) -1)
1821 {
1822 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
1823 + entry->plt_entry;
1824
1825 BFD_ASSERT (entry->fd_entry);
1826
1827 /* Figure out what kind of PLT entry we need, depending on the
1828 location of the function descriptor within the GOT. */
1829 if (entry->fd_entry >= -(1 << (18 - 1))
1830 && entry->fd_entry + 4 < (1 << (18 - 1)))
1831 {
1832 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
1833 bfd_put_32 (output_bfd,
1834 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
1835 plt_code);
1836 bfd_put_32 (output_bfd,
1837 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
1838 plt_code + 4);
1839 plt_code += 8;
1840 }
1841 else
1842 {
1843 /* P1.L = fd_entry; P1.H = fd_entry;
1844 P3 = P3 + P1;
1845 P1 = [P3];
1846 P3 = [P3 + 4]; */
1847 bfd_put_32 (output_bfd,
1848 0xe109 | (entry->fd_entry << 16),
1849 plt_code);
1850 bfd_put_32 (output_bfd,
1851 0xe149 | (entry->fd_entry & 0xFFFF0000),
1852 plt_code + 4);
1853 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
1854 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
1855 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
1856 plt_code += 14;
1857 }
1858 /* JUMP (P1) */
1859 bfd_put_16 (output_bfd, 0x0051, plt_code);
1860 }
1861
1862 /* Generate code for the lazy PLT entry. */
1863 if (entry->lzplt_entry != (bfd_vma) -1)
1864 {
1865 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
1866 + entry->lzplt_entry;
1867 bfd_vma resolverStub_addr;
1868
1869 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
1870 lzplt_code += 4;
1871
1872 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
1873 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
1874 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
1875 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
1876
1877 if (entry->lzplt_entry == resolverStub_addr)
1878 {
1879 /* This is a lazy PLT entry that includes a resolver call.
1880 P2 = [P3];
1881 R3 = [P3 + 4];
1882 JUMP (P2); */
1883 bfd_put_32 (output_bfd,
1884 0xa05b915a,
1885 lzplt_code);
1886 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
1887 }
1888 else
1889 {
1890 /* JUMP.S resolverStub */
1891 bfd_put_16 (output_bfd,
1892 0x2000
1893 | (((resolverStub_addr - entry->lzplt_entry)
1894 / 2) & (((bfd_vma)1 << 12) - 1)),
1895 lzplt_code);
1896 }
1897 }
1898
1899 return TRUE;
1900 }
1901
1902
1903 /* Look through the relocs for a section during the first phase, and
1904 allocate space in the global offset table or procedure linkage
1905 table. */
1906
1907 static bfd_boolean
1908 bfin_check_relocs (bfd * abfd,
1909 struct bfd_link_info *info,
1910 asection *sec,
1911 const Elf_Internal_Rela *relocs)
1912 {
1913 bfd *dynobj;
1914 Elf_Internal_Shdr *symtab_hdr;
1915 struct elf_link_hash_entry **sym_hashes;
1916 bfd_signed_vma *local_got_refcounts;
1917 const Elf_Internal_Rela *rel;
1918 const Elf_Internal_Rela *rel_end;
1919 asection *sgot;
1920 asection *srelgot;
1921 asection *sreloc;
1922 if (info->relocatable)
1923 return TRUE;
1924
1925 dynobj = elf_hash_table (info)->dynobj;
1926 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1927 sym_hashes = elf_sym_hashes (abfd);
1928 local_got_refcounts = elf_local_got_refcounts (abfd);
1929
1930 sgot = NULL;
1931 srelgot = NULL;
1932 sreloc = NULL;
1933
1934 rel_end = relocs + sec->reloc_count;
1935 for (rel = relocs; rel < rel_end; rel++)
1936 {
1937 unsigned long r_symndx;
1938 struct elf_link_hash_entry *h;
1939
1940 r_symndx = ELF32_R_SYM (rel->r_info);
1941 if (r_symndx < symtab_hdr->sh_info)
1942 h = NULL;
1943 else
1944 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1945
1946 switch (ELF32_R_TYPE (rel->r_info))
1947 {
1948 /* This relocation describes the C++ object vtable hierarchy.
1949 Reconstruct it for later use during GC. */
1950 case R_BFIN_GNU_VTINHERIT:
1951 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1952 return FALSE;
1953 break;
1954
1955 /* This relocation describes which C++ vtable entries
1956 are actually used. Record for later use during GC. */
1957 case R_BFIN_GNU_VTENTRY:
1958 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1959 return FALSE;
1960 break;
1961
1962 case R_got:
1963 if (h != NULL
1964 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1965 break;
1966 /* Fall through. */
1967
1968 if (dynobj == NULL)
1969 {
1970 /* Create the .got section. */
1971 elf_hash_table (info)->dynobj = dynobj = abfd;
1972 if (!_bfd_elf_create_got_section (dynobj, info))
1973 return FALSE;
1974 }
1975
1976 if (sgot == NULL)
1977 {
1978 sgot = bfd_get_section_by_name (dynobj, ".got");
1979 BFD_ASSERT (sgot != NULL);
1980 }
1981
1982 if (srelgot == NULL && (h != NULL || info->shared))
1983 {
1984 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1985 if (srelgot == NULL)
1986 {
1987 srelgot = bfd_make_section (dynobj, ".rela.got");
1988 if (srelgot == NULL
1989 || !bfd_set_section_flags (dynobj, srelgot,
1990 (SEC_ALLOC
1991 | SEC_LOAD
1992 | SEC_HAS_CONTENTS
1993 | SEC_IN_MEMORY
1994 | SEC_LINKER_CREATED
1995 | SEC_READONLY))
1996 || !bfd_set_section_alignment (dynobj, srelgot, 2))
1997 return FALSE;
1998 }
1999 }
2000
2001 if (h != NULL)
2002 {
2003 if (h->got.refcount == 0)
2004 {
2005 /* Make sure this symbol is output as a dynamic symbol. */
2006 if (h->dynindx == -1 && !h->forced_local)
2007 {
2008 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2009 return FALSE;
2010 }
2011
2012 /* Allocate space in the .got section. */
2013 sgot->size += 4;
2014 /* Allocate relocation space. */
2015 srelgot->size += sizeof (Elf32_External_Rela);
2016 }
2017 h->got.refcount++;
2018 }
2019 else
2020 {
2021 /* This is a global offset table entry for a local symbol. */
2022 if (local_got_refcounts == NULL)
2023 {
2024 bfd_size_type size;
2025
2026 size = symtab_hdr->sh_info;
2027 size *= sizeof (bfd_signed_vma);
2028 local_got_refcounts = ((bfd_signed_vma *)
2029 bfd_zalloc (abfd, size));
2030 if (local_got_refcounts == NULL)
2031 return FALSE;
2032 elf_local_got_refcounts (abfd) = local_got_refcounts;
2033 }
2034 if (local_got_refcounts[r_symndx] == 0)
2035 {
2036 sgot->size += 4;
2037 if (info->shared)
2038 {
2039 /* If we are generating a shared object, we need to
2040 output a R_68K_RELATIVE reloc so that the dynamic
2041 linker can adjust this GOT entry. */
2042 srelgot->size += sizeof (Elf32_External_Rela);
2043 }
2044 }
2045 local_got_refcounts[r_symndx]++;
2046 }
2047 break;
2048
2049 default:
2050 break;
2051 }
2052 }
2053
2054 return TRUE;
2055 }
2056
2057 static enum elf_reloc_type_class
2058 elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela)
2059 {
2060 switch ((int) ELF32_R_TYPE (rela->r_info))
2061 {
2062 default:
2063 return reloc_class_normal;
2064 }
2065 }
2066 \f
2067 /* Relocate an Blackfin ELF section.
2068
2069 The RELOCATE_SECTION function is called by the new ELF backend linker
2070 to handle the relocations for a section.
2071
2072 The relocs are always passed as Rela structures; if the section
2073 actually uses Rel structures, the r_addend field will always be
2074 zero.
2075
2076 This function is responsible for adjusting the section contents as
2077 necessary, and (if using Rela relocs and generating a relocatable
2078 output file) adjusting the reloc addend as necessary.
2079
2080 This function does not have to worry about setting the reloc
2081 address or the reloc symbol index.
2082
2083 LOCAL_SYMS is a pointer to the swapped in local symbols.
2084
2085 LOCAL_SECTIONS is an array giving the section in the input file
2086 corresponding to the st_shndx field of each local symbol.
2087
2088 The global hash table entry for the global symbols can be found
2089 via elf_sym_hashes (input_bfd).
2090
2091 When generating relocatable output, this function must handle
2092 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2093 going to be the section symbol corresponding to the output
2094 section, which means that the addend must be adjusted
2095 accordingly. */
2096
2097 static bfd_boolean
2098 bfinfdpic_relocate_section (bfd * output_bfd,
2099 struct bfd_link_info *info,
2100 bfd * input_bfd,
2101 asection * input_section,
2102 bfd_byte * contents,
2103 Elf_Internal_Rela * relocs,
2104 Elf_Internal_Sym * local_syms,
2105 asection ** local_sections)
2106 {
2107 Elf_Internal_Shdr *symtab_hdr;
2108 struct elf_link_hash_entry **sym_hashes;
2109 Elf_Internal_Rela *rel;
2110 Elf_Internal_Rela *relend;
2111 unsigned isec_segment, got_segment, plt_segment,
2112 check_segment[2];
2113 int silence_segment_error = !(info->shared || info->pie);
2114
2115 if (info->relocatable)
2116 return TRUE;
2117
2118 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2119 sym_hashes = elf_sym_hashes (input_bfd);
2120 relend = relocs + input_section->reloc_count;
2121
2122 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2123 input_section->output_section);
2124 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2125 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2126 bfinfdpic_got_section (info)
2127 ->output_section);
2128 else
2129 got_segment = -1;
2130 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2131 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2132 bfinfdpic_plt_section (info)
2133 ->output_section);
2134 else
2135 plt_segment = -1;
2136
2137 for (rel = relocs; rel < relend; rel ++)
2138 {
2139 reloc_howto_type *howto;
2140 unsigned long r_symndx;
2141 Elf_Internal_Sym *sym;
2142 asection *sec;
2143 struct elf_link_hash_entry *h;
2144 bfd_vma relocation;
2145 bfd_reloc_status_type r;
2146 const char * name = NULL;
2147 int r_type;
2148 asection *osec;
2149 struct bfinfdpic_relocs_info *picrel;
2150 bfd_vma orig_addend = rel->r_addend;
2151
2152 r_type = ELF32_R_TYPE (rel->r_info);
2153
2154 if (r_type == R_BFIN_GNU_VTINHERIT
2155 || r_type == R_BFIN_GNU_VTENTRY)
2156 continue;
2157
2158 /* This is a final link. */
2159 r_symndx = ELF32_R_SYM (rel->r_info);
2160 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2161 if (howto == NULL)
2162 {
2163 bfd_set_error (bfd_error_bad_value);
2164 return FALSE;
2165 }
2166
2167 h = NULL;
2168 sym = NULL;
2169 sec = NULL;
2170
2171 if (r_symndx < symtab_hdr->sh_info)
2172 {
2173 sym = local_syms + r_symndx;
2174 osec = sec = local_sections [r_symndx];
2175 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2176
2177 name = bfd_elf_string_from_elf_section
2178 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2179 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2180 }
2181 else
2182 {
2183 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2184
2185 while (h->root.type == bfd_link_hash_indirect
2186 || h->root.type == bfd_link_hash_warning)
2187 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2188
2189 name = h->root.root.string;
2190
2191 if ((h->root.type == bfd_link_hash_defined
2192 || h->root.type == bfd_link_hash_defweak)
2193 && ! BFINFDPIC_SYM_LOCAL (info, h))
2194 {
2195 sec = NULL;
2196 relocation = 0;
2197 }
2198 else
2199 if (h->root.type == bfd_link_hash_defined
2200 || h->root.type == bfd_link_hash_defweak)
2201 {
2202 sec = h->root.u.def.section;
2203 relocation = (h->root.u.def.value
2204 + sec->output_section->vma
2205 + sec->output_offset);
2206 }
2207 else if (h->root.type == bfd_link_hash_undefweak)
2208 {
2209 relocation = 0;
2210 }
2211 else if (info->unresolved_syms_in_objects == RM_IGNORE
2212 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2213 relocation = 0;
2214 else
2215 {
2216 if (! ((*info->callbacks->undefined_symbol)
2217 (info, h->root.root.string, input_bfd,
2218 input_section, rel->r_offset,
2219 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
2220 || ELF_ST_VISIBILITY (h->other)))))
2221 return FALSE;
2222 relocation = 0;
2223 }
2224 osec = sec;
2225 }
2226
2227 switch (r_type)
2228 {
2229 case R_pcrel24:
2230 case R_pcrel24_jump_l:
2231 case R_byte4_data:
2232 if (! IS_FDPIC (output_bfd))
2233 goto non_fdpic;
2234
2235 case R_BFIN_GOT17M4:
2236 case R_BFIN_GOTHI:
2237 case R_BFIN_GOTLO:
2238 case R_BFIN_FUNCDESC_GOT17M4:
2239 case R_BFIN_FUNCDESC_GOTHI:
2240 case R_BFIN_FUNCDESC_GOTLO:
2241 case R_BFIN_GOTOFF17M4:
2242 case R_BFIN_GOTOFFHI:
2243 case R_BFIN_GOTOFFLO:
2244 case R_BFIN_FUNCDESC_GOTOFF17M4:
2245 case R_BFIN_FUNCDESC_GOTOFFHI:
2246 case R_BFIN_FUNCDESC_GOTOFFLO:
2247 case R_BFIN_FUNCDESC:
2248 case R_BFIN_FUNCDESC_VALUE:
2249 if (h != NULL)
2250 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2251 (info), input_bfd, h,
2252 orig_addend, INSERT);
2253 else
2254 /* In order to find the entry we created before, we must
2255 use the original addend, not the one that may have been
2256 modified by _bfd_elf_rela_local_sym(). */
2257 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2258 (info), input_bfd, r_symndx,
2259 orig_addend, INSERT);
2260 if (! picrel)
2261 return FALSE;
2262
2263 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2264 osec, sym,
2265 rel->r_addend))
2266 {
2267 (*_bfd_error_handler)
2268 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2269 input_bfd, input_section, rel->r_offset, name);
2270 return FALSE;
2271
2272 }
2273
2274 break;
2275
2276 default:
2277 non_fdpic:
2278 picrel = NULL;
2279 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2280 {
2281 info->callbacks->warning
2282 (info, _("relocation references symbol not defined in the module"),
2283 name, input_bfd, input_section, rel->r_offset);
2284 return FALSE;
2285 }
2286 break;
2287 }
2288
2289 switch (r_type)
2290 {
2291 case R_pcrel24:
2292 case R_pcrel24_jump_l:
2293 check_segment[0] = isec_segment;
2294 if (! IS_FDPIC (output_bfd))
2295 check_segment[1] = isec_segment;
2296 else if (picrel->plt)
2297 {
2298 relocation = bfinfdpic_plt_section (info)->output_section->vma
2299 + bfinfdpic_plt_section (info)->output_offset
2300 + picrel->plt_entry;
2301 check_segment[1] = plt_segment;
2302 }
2303 /* We don't want to warn on calls to undefined weak symbols,
2304 as calls to them must be protected by non-NULL tests
2305 anyway, and unprotected calls would invoke undefined
2306 behavior. */
2307 else if (picrel->symndx == -1
2308 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2309 check_segment[1] = check_segment[0];
2310 else
2311 check_segment[1] = sec
2312 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2313 : (unsigned)-1;
2314 break;
2315
2316 case R_BFIN_GOT17M4:
2317 case R_BFIN_GOTHI:
2318 case R_BFIN_GOTLO:
2319 relocation = picrel->got_entry;
2320 check_segment[0] = check_segment[1] = got_segment;
2321 break;
2322
2323 case R_BFIN_FUNCDESC_GOT17M4:
2324 case R_BFIN_FUNCDESC_GOTHI:
2325 case R_BFIN_FUNCDESC_GOTLO:
2326 relocation = picrel->fdgot_entry;
2327 check_segment[0] = check_segment[1] = got_segment;
2328 break;
2329
2330 case R_BFIN_GOTOFFHI:
2331 case R_BFIN_GOTOFF17M4:
2332 case R_BFIN_GOTOFFLO:
2333 relocation -= bfinfdpic_got_section (info)->output_section->vma
2334 + bfinfdpic_got_section (info)->output_offset
2335 + bfinfdpic_got_initial_offset (info);
2336 check_segment[0] = got_segment;
2337 check_segment[1] = sec
2338 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2339 : (unsigned)-1;
2340 break;
2341
2342 case R_BFIN_FUNCDESC_GOTOFF17M4:
2343 case R_BFIN_FUNCDESC_GOTOFFHI:
2344 case R_BFIN_FUNCDESC_GOTOFFLO:
2345 relocation = picrel->fd_entry;
2346 check_segment[0] = check_segment[1] = got_segment;
2347 break;
2348
2349 case R_BFIN_FUNCDESC:
2350 {
2351 int dynindx;
2352 bfd_vma addend = rel->r_addend;
2353
2354 if (! (h && h->root.type == bfd_link_hash_undefweak
2355 && BFINFDPIC_SYM_LOCAL (info, h)))
2356 {
2357 /* If the symbol is dynamic and there may be dynamic
2358 symbol resolution because we are or are linked with a
2359 shared library, emit a FUNCDESC relocation such that
2360 the dynamic linker will allocate the function
2361 descriptor. If the symbol needs a non-local function
2362 descriptor but binds locally (e.g., its visibility is
2363 protected, emit a dynamic relocation decayed to
2364 section+offset. */
2365 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2366 && BFINFDPIC_SYM_LOCAL (info, h)
2367 && !(info->executable && !info->pie))
2368 {
2369 dynindx = elf_section_data (h->root.u.def.section
2370 ->output_section)->dynindx;
2371 addend += h->root.u.def.section->output_offset
2372 + h->root.u.def.value;
2373 }
2374 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2375 {
2376 if (addend)
2377 {
2378 info->callbacks->warning
2379 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2380 name, input_bfd, input_section, rel->r_offset);
2381 return FALSE;
2382 }
2383 dynindx = h->dynindx;
2384 }
2385 else
2386 {
2387 /* Otherwise, we know we have a private function
2388 descriptor, so reference it directly. */
2389 BFD_ASSERT (picrel->privfd);
2390 r_type = R_byte4_data;
2391 dynindx = elf_section_data (bfinfdpic_got_section (info)
2392 ->output_section)->dynindx;
2393 addend = bfinfdpic_got_section (info)->output_offset
2394 + bfinfdpic_got_initial_offset (info)
2395 + picrel->fd_entry;
2396 }
2397
2398 /* If there is room for dynamic symbol resolution, emit
2399 the dynamic relocation. However, if we're linking an
2400 executable at a fixed location, we won't have emitted a
2401 dynamic symbol entry for the got section, so idx will
2402 be zero, which means we can and should compute the
2403 address of the private descriptor ourselves. */
2404 if (info->executable && !info->pie
2405 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2406 {
2407 addend += bfinfdpic_got_section (info)->output_section->vma;
2408 if ((bfd_get_section_flags (output_bfd,
2409 input_section->output_section)
2410 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2411 {
2412 if (_bfinfdpic_osec_readonly_p (output_bfd,
2413 input_section
2414 ->output_section))
2415 {
2416 info->callbacks->warning
2417 (info,
2418 _("cannot emit fixups in read-only section"),
2419 name, input_bfd, input_section, rel->r_offset);
2420 return FALSE;
2421 }
2422 _bfinfdpic_add_rofixup (output_bfd,
2423 bfinfdpic_gotfixup_section
2424 (info),
2425 _bfd_elf_section_offset
2426 (output_bfd, info,
2427 input_section, rel->r_offset)
2428 + input_section
2429 ->output_section->vma
2430 + input_section->output_offset,
2431 picrel);
2432 }
2433 }
2434 else if ((bfd_get_section_flags (output_bfd,
2435 input_section->output_section)
2436 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2437 {
2438 if (_bfinfdpic_osec_readonly_p (output_bfd,
2439 input_section
2440 ->output_section))
2441 {
2442 info->callbacks->warning
2443 (info,
2444 _("cannot emit dynamic relocations in read-only section"),
2445 name, input_bfd, input_section, rel->r_offset);
2446 return FALSE;
2447 }
2448 _bfinfdpic_add_dyn_reloc (output_bfd,
2449 bfinfdpic_gotrel_section (info),
2450 _bfd_elf_section_offset
2451 (output_bfd, info,
2452 input_section, rel->r_offset)
2453 + input_section
2454 ->output_section->vma
2455 + input_section->output_offset,
2456 r_type, dynindx, addend, picrel);
2457 }
2458 else
2459 addend += bfinfdpic_got_section (info)->output_section->vma;
2460 }
2461
2462 /* We want the addend in-place because dynamic
2463 relocations are REL. Setting relocation to it should
2464 arrange for it to be installed. */
2465 relocation = addend - rel->r_addend;
2466 }
2467 check_segment[0] = check_segment[1] = got_segment;
2468 break;
2469
2470 case R_byte4_data:
2471 if (! IS_FDPIC (output_bfd))
2472 {
2473 check_segment[0] = check_segment[1] = -1;
2474 break;
2475 }
2476 /* Fall through. */
2477 case R_BFIN_FUNCDESC_VALUE:
2478 {
2479 int dynindx;
2480 bfd_vma addend = rel->r_addend;
2481
2482 /* If the symbol is dynamic but binds locally, use
2483 section+offset. */
2484 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2485 {
2486 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2487 {
2488 info->callbacks->warning
2489 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2490 name, input_bfd, input_section, rel->r_offset);
2491 return FALSE;
2492 }
2493 dynindx = h->dynindx;
2494 }
2495 else
2496 {
2497 if (h)
2498 addend += h->root.u.def.value;
2499 else
2500 addend += sym->st_value;
2501 if (osec)
2502 addend += osec->output_offset;
2503 if (osec && osec->output_section
2504 && ! bfd_is_abs_section (osec->output_section)
2505 && ! bfd_is_und_section (osec->output_section))
2506 dynindx = elf_section_data (osec->output_section)->dynindx;
2507 else
2508 dynindx = 0;
2509 }
2510
2511 /* If we're linking an executable at a fixed address, we
2512 can omit the dynamic relocation as long as the symbol
2513 is defined in the current link unit (which is implied
2514 by its output section not being NULL). */
2515 if (info->executable && !info->pie
2516 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2517 {
2518 if (osec)
2519 addend += osec->output_section->vma;
2520 if (IS_FDPIC (input_bfd)
2521 && (bfd_get_section_flags (output_bfd,
2522 input_section->output_section)
2523 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2524 {
2525 if (_bfinfdpic_osec_readonly_p (output_bfd,
2526 input_section
2527 ->output_section))
2528 {
2529 info->callbacks->warning
2530 (info,
2531 _("cannot emit fixups in read-only section"),
2532 name, input_bfd, input_section, rel->r_offset);
2533 return FALSE;
2534 }
2535 if (!h || h->root.type != bfd_link_hash_undefweak)
2536 {
2537 _bfinfdpic_add_rofixup (output_bfd,
2538 bfinfdpic_gotfixup_section
2539 (info),
2540 _bfd_elf_section_offset
2541 (output_bfd, info,
2542 input_section, rel->r_offset)
2543 + input_section
2544 ->output_section->vma
2545 + input_section->output_offset,
2546 picrel);
2547 if (r_type == R_BFIN_FUNCDESC_VALUE)
2548 _bfinfdpic_add_rofixup
2549 (output_bfd,
2550 bfinfdpic_gotfixup_section (info),
2551 _bfd_elf_section_offset
2552 (output_bfd, info,
2553 input_section, rel->r_offset)
2554 + input_section->output_section->vma
2555 + input_section->output_offset + 4, picrel);
2556 }
2557 }
2558 }
2559 else
2560 {
2561 if ((bfd_get_section_flags (output_bfd,
2562 input_section->output_section)
2563 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2564 {
2565 if (_bfinfdpic_osec_readonly_p (output_bfd,
2566 input_section
2567 ->output_section))
2568 {
2569 info->callbacks->warning
2570 (info,
2571 _("cannot emit dynamic relocations in read-only section"),
2572 name, input_bfd, input_section, rel->r_offset);
2573 return FALSE;
2574 }
2575 _bfinfdpic_add_dyn_reloc (output_bfd,
2576 bfinfdpic_gotrel_section (info),
2577 _bfd_elf_section_offset
2578 (output_bfd, info,
2579 input_section, rel->r_offset)
2580 + input_section
2581 ->output_section->vma
2582 + input_section->output_offset,
2583 r_type, dynindx, addend, picrel);
2584 }
2585 else if (osec)
2586 addend += osec->output_section->vma;
2587 /* We want the addend in-place because dynamic
2588 relocations are REL. Setting relocation to it
2589 should arrange for it to be installed. */
2590 relocation = addend - rel->r_addend;
2591 }
2592
2593 if (r_type == R_BFIN_FUNCDESC_VALUE)
2594 {
2595 /* If we've omitted the dynamic relocation, just emit
2596 the fixed addresses of the symbol and of the local
2597 GOT base offset. */
2598 if (info->executable && !info->pie
2599 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2600 bfd_put_32 (output_bfd,
2601 bfinfdpic_got_section (info)->output_section->vma
2602 + bfinfdpic_got_section (info)->output_offset
2603 + bfinfdpic_got_initial_offset (info),
2604 contents + rel->r_offset + 4);
2605 else
2606 /* A function descriptor used for lazy or local
2607 resolving is initialized such that its high word
2608 contains the output section index in which the
2609 PLT entries are located, and the low word
2610 contains the offset of the lazy PLT entry entry
2611 point into that section. */
2612 bfd_put_32 (output_bfd,
2613 h && ! BFINFDPIC_SYM_LOCAL (info, h)
2614 ? 0
2615 : _bfinfdpic_osec_to_segment (output_bfd,
2616 sec
2617 ->output_section),
2618 contents + rel->r_offset + 4);
2619 }
2620 }
2621 check_segment[0] = check_segment[1] = got_segment;
2622 break;
2623
2624 default:
2625 check_segment[0] = isec_segment;
2626 check_segment[1] = sec
2627 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2628 : (unsigned)-1;
2629 break;
2630 }
2631
2632 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
2633 {
2634 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
2635 in the ld testsuite. */
2636 /* This helps catch problems in GCC while we can't do more
2637 than static linking. The idea is to test whether the
2638 input file basename is crt0.o only once. */
2639 if (silence_segment_error == 1)
2640 silence_segment_error =
2641 (strlen (input_bfd->filename) == 6
2642 && strcmp (input_bfd->filename, "crt0.o") == 0)
2643 || (strlen (input_bfd->filename) > 6
2644 && strcmp (input_bfd->filename
2645 + strlen (input_bfd->filename) - 7,
2646 "/crt0.o") == 0)
2647 ? -1 : 0;
2648 #endif
2649 if (!silence_segment_error
2650 /* We don't want duplicate errors for undefined
2651 symbols. */
2652 && !(picrel && picrel->symndx == -1
2653 && picrel->d.h->root.type == bfd_link_hash_undefined))
2654 info->callbacks->warning
2655 (info,
2656 (info->shared || info->pie)
2657 ? _("relocations between different segments are not supported")
2658 : _("warning: relocation references a different segment"),
2659 name, input_bfd, input_section, rel->r_offset);
2660 if (!silence_segment_error && (info->shared || info->pie))
2661 return FALSE;
2662 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
2663 }
2664
2665 switch (r_type)
2666 {
2667 case R_BFIN_GOTOFFHI:
2668 /* We need the addend to be applied before we shift the
2669 value right. */
2670 relocation += rel->r_addend;
2671 /* Fall through. */
2672 case R_BFIN_GOTHI:
2673 case R_BFIN_FUNCDESC_GOTHI:
2674 case R_BFIN_FUNCDESC_GOTOFFHI:
2675 relocation >>= 16;
2676 /* Fall through. */
2677
2678 case R_BFIN_GOTLO:
2679 case R_BFIN_FUNCDESC_GOTLO:
2680 case R_BFIN_GOTOFFLO:
2681 case R_BFIN_FUNCDESC_GOTOFFLO:
2682 relocation &= 0xffff;
2683 break;
2684
2685 default:
2686 break;
2687 }
2688
2689 switch (r_type)
2690 {
2691 case R_pcrel24:
2692 case R_pcrel24_jump_l:
2693 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
2694 break;
2695 /* Fall through. */
2696
2697 /* When referencing a GOT entry, a function descriptor or a
2698 PLT, we don't want the addend to apply to the reference,
2699 but rather to the referenced symbol. The actual entry
2700 will have already been created taking the addend into
2701 account, so cancel it out here. */
2702 case R_BFIN_GOT17M4:
2703 case R_BFIN_GOTHI:
2704 case R_BFIN_GOTLO:
2705 case R_BFIN_FUNCDESC_GOT17M4:
2706 case R_BFIN_FUNCDESC_GOTHI:
2707 case R_BFIN_FUNCDESC_GOTLO:
2708 case R_BFIN_FUNCDESC_GOTOFF17M4:
2709 case R_BFIN_FUNCDESC_GOTOFFHI:
2710 case R_BFIN_FUNCDESC_GOTOFFLO:
2711 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
2712 here, since we do want to apply the addend to the others.
2713 Note that we've applied the addend to GOTOFFHI before we
2714 shifted it right. */
2715 case R_BFIN_GOTOFFHI:
2716 relocation -= rel->r_addend;
2717 break;
2718
2719 default:
2720 break;
2721 }
2722
2723 if (r_type == R_pcrel24
2724 || r_type == R_pcrel24_jump_l)
2725 {
2726 bfd_vma x;
2727 bfd_vma address = rel->r_offset;
2728
2729 relocation += rel->r_addend;
2730
2731 /* Perform usual pc-relative correction. */
2732 relocation -= input_section->output_section->vma + input_section->output_offset;
2733 relocation -= address;
2734
2735 /* We are getting reloc_entry->address 2 byte off from
2736 the start of instruction. Assuming absolute postion
2737 of the reloc data. But, following code had been written assuming
2738 reloc address is starting at begining of instruction.
2739 To compensate that I have increased the value of
2740 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
2741
2742 relocation += 2;
2743 address -= 2;
2744
2745 relocation >>= 1;
2746
2747 x = bfd_get_16 (input_bfd, contents + address);
2748 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
2749 bfd_put_16 (input_bfd, x, contents + address);
2750
2751 x = bfd_get_16 (input_bfd, contents + address + 2);
2752 x = relocation & 0xFFFF;
2753 bfd_put_16 (input_bfd, x, contents + address + 2);
2754 r = bfd_reloc_ok;
2755 }
2756 else
2757 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2758 contents, rel->r_offset,
2759 relocation, rel->r_addend);
2760
2761 if (r != bfd_reloc_ok)
2762 {
2763 const char * msg = (const char *) NULL;
2764
2765 switch (r)
2766 {
2767 case bfd_reloc_overflow:
2768 r = info->callbacks->reloc_overflow
2769 (info, (h ? &h->root : NULL), name, howto->name,
2770 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2771 break;
2772
2773 case bfd_reloc_undefined:
2774 r = info->callbacks->undefined_symbol
2775 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
2776 break;
2777
2778 case bfd_reloc_outofrange:
2779 msg = _("internal error: out of range error");
2780 break;
2781
2782 case bfd_reloc_notsupported:
2783 msg = _("internal error: unsupported relocation error");
2784 break;
2785
2786 case bfd_reloc_dangerous:
2787 msg = _("internal error: dangerous relocation");
2788 break;
2789
2790 default:
2791 msg = _("internal error: unknown error");
2792 break;
2793 }
2794
2795 if (msg)
2796 r = info->callbacks->warning
2797 (info, msg, name, input_bfd, input_section, rel->r_offset);
2798
2799 if (! r)
2800 return FALSE;
2801 }
2802 }
2803
2804 return TRUE;
2805 }
2806
2807 static bfd_boolean
2808 bfin_relocate_section (bfd * output_bfd,
2809 struct bfd_link_info *info,
2810 bfd * input_bfd,
2811 asection * input_section,
2812 bfd_byte * contents,
2813 Elf_Internal_Rela * relocs,
2814 Elf_Internal_Sym * local_syms,
2815 asection ** local_sections)
2816 {
2817 bfd *dynobj;
2818 Elf_Internal_Shdr *symtab_hdr;
2819 struct elf_link_hash_entry **sym_hashes;
2820 bfd_vma *local_got_offsets;
2821 asection *sgot;
2822 asection *sreloc;
2823 Elf_Internal_Rela *rel;
2824 Elf_Internal_Rela *relend;
2825 int i = 0;
2826
2827 if (info->relocatable)
2828 return TRUE;
2829
2830 dynobj = elf_hash_table (info)->dynobj;
2831 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2832 sym_hashes = elf_sym_hashes (input_bfd);
2833 local_got_offsets = elf_local_got_offsets (input_bfd);
2834
2835 sgot = NULL;
2836 sreloc = NULL;
2837
2838 rel = relocs;
2839 relend = relocs + input_section->reloc_count;
2840 for (; rel < relend; rel++, i++)
2841 {
2842 int r_type;
2843 reloc_howto_type *howto;
2844 unsigned long r_symndx;
2845 struct elf_link_hash_entry *h;
2846 Elf_Internal_Sym *sym;
2847 asection *sec;
2848 bfd_vma relocation = 0;
2849 bfd_boolean unresolved_reloc;
2850 bfd_reloc_status_type r;
2851 bfd_vma address;
2852
2853 r_type = ELF32_R_TYPE (rel->r_info);
2854 if (r_type < 0 || r_type >= 243)
2855 {
2856 bfd_set_error (bfd_error_bad_value);
2857 return FALSE;
2858 }
2859
2860 if (r_type == R_BFIN_GNU_VTENTRY
2861 || r_type == R_BFIN_GNU_VTINHERIT)
2862 continue;
2863
2864 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2865 if (howto == NULL)
2866 {
2867 bfd_set_error (bfd_error_bad_value);
2868 return FALSE;
2869 }
2870 r_symndx = ELF32_R_SYM (rel->r_info);
2871
2872 h = NULL;
2873 sym = NULL;
2874 sec = NULL;
2875 unresolved_reloc = FALSE;
2876
2877 if (r_symndx < symtab_hdr->sh_info)
2878 {
2879 sym = local_syms + r_symndx;
2880 sec = local_sections[r_symndx];
2881 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2882 }
2883 else
2884 {
2885 bfd_boolean warned;
2886 h = NULL;
2887 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2888 r_symndx, symtab_hdr, sym_hashes,
2889 h, sec, relocation,
2890 unresolved_reloc, warned);
2891 }
2892
2893 address = rel->r_offset;
2894
2895 /* Then, process normally. */
2896 switch (r_type)
2897 {
2898 case R_BFIN_GNU_VTINHERIT:
2899 case R_BFIN_GNU_VTENTRY:
2900 return bfd_reloc_ok;
2901
2902 case R_got:
2903 /* Relocation is to the address of the entry for this symbol
2904 in the global offset table. */
2905 if (h != NULL
2906 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2907 goto do_default;
2908 /* Fall through. */
2909 /* Relocation is the offset of the entry for this symbol in
2910 the global offset table. */
2911
2912 {
2913 bfd_vma off;
2914
2915 if (sgot == NULL)
2916 {
2917 sgot = bfd_get_section_by_name (dynobj, ".got");
2918 BFD_ASSERT (sgot != NULL);
2919 }
2920
2921 if (h != NULL)
2922 {
2923 bfd_boolean dyn;
2924
2925 off = h->got.offset;
2926 BFD_ASSERT (off != (bfd_vma) - 1);
2927 dyn = elf_hash_table (info)->dynamic_sections_created;
2928
2929 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2930 || (info->shared
2931 && (info->symbolic
2932 || h->dynindx == -1
2933 || h->forced_local)
2934 && h->def_regular))
2935 {
2936 /* This is actually a static link, or it is a
2937 -Bsymbolic link and the symbol is defined
2938 locally, or the symbol was forced to be local
2939 because of a version file.. We must initialize
2940 this entry in the global offset table. Since
2941 the offset must always be a multiple of 4, we
2942 use the least significant bit to record whether
2943 we have initialized it already.
2944
2945 When doing a dynamic link, we create a .rela.got
2946 relocation entry to initialize the value. This
2947 is done in the finish_dynamic_symbol routine. */
2948 if ((off & 1) != 0)
2949 off &= ~1;
2950 else
2951 {
2952 bfd_put_32 (output_bfd, relocation,
2953 sgot->contents + off);
2954 h->got.offset |= 1;
2955 }
2956 }
2957 else
2958 unresolved_reloc = FALSE;
2959 }
2960 else
2961 {
2962 BFD_ASSERT (local_got_offsets != NULL);
2963 off = local_got_offsets[r_symndx];
2964 BFD_ASSERT (off != (bfd_vma) - 1);
2965
2966 /* The offset must always be a multiple of 4. We use
2967 the least significant bit to record whether we have
2968 already generated the necessary reloc. */
2969 if ((off & 1) != 0)
2970 off &= ~1;
2971 else
2972 {
2973 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
2974
2975 if (info->shared)
2976 {
2977 asection *s;
2978 Elf_Internal_Rela outrel;
2979 bfd_byte *loc;
2980
2981 s = bfd_get_section_by_name (dynobj, ".rela.got");
2982 BFD_ASSERT (s != NULL);
2983
2984 outrel.r_offset = (sgot->output_section->vma
2985 + sgot->output_offset + off);
2986 outrel.r_info =
2987 ELF32_R_INFO (0, R_pcrel24);
2988 outrel.r_addend = relocation;
2989 loc = s->contents;
2990 loc +=
2991 s->reloc_count++ * sizeof (Elf32_External_Rela);
2992 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2993 }
2994
2995 local_got_offsets[r_symndx] |= 1;
2996 }
2997 }
2998
2999 relocation = sgot->output_offset + off;
3000 rel->r_addend = 0;
3001 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
3002 relocation /= 4;
3003 }
3004 goto do_default;
3005
3006 case R_pcrel24:
3007 case R_pcrel24_jump_l:
3008 {
3009 bfd_vma x;
3010
3011 relocation += rel->r_addend;
3012
3013 /* Perform usual pc-relative correction. */
3014 relocation -= input_section->output_section->vma + input_section->output_offset;
3015 relocation -= address;
3016
3017 /* We are getting reloc_entry->address 2 byte off from
3018 the start of instruction. Assuming absolute postion
3019 of the reloc data. But, following code had been written assuming
3020 reloc address is starting at begining of instruction.
3021 To compensate that I have increased the value of
3022 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
3023
3024 relocation += 2;
3025 address -= 2;
3026
3027 relocation >>= 1;
3028
3029 x = bfd_get_16 (input_bfd, contents + address);
3030 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
3031 bfd_put_16 (input_bfd, x, contents + address);
3032
3033 x = bfd_get_16 (input_bfd, contents + address + 2);
3034 x = relocation & 0xFFFF;
3035 bfd_put_16 (input_bfd, x, contents + address + 2);
3036 r = bfd_reloc_ok;
3037 }
3038 break;
3039
3040 default:
3041 do_default:
3042 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3043 contents, address,
3044 relocation, rel->r_addend);
3045
3046 break;
3047 }
3048
3049 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3050 because such sections are not SEC_ALLOC and thus ld.so will
3051 not process them. */
3052 if (unresolved_reloc
3053 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic))
3054 {
3055 (*_bfd_error_handler)
3056 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3057 input_bfd,
3058 input_section, (long) rel->r_offset, h->root.root.string);
3059 return FALSE;
3060 }
3061
3062 if (r != bfd_reloc_ok)
3063 {
3064 const char *name;
3065
3066 if (h != NULL)
3067 name = h->root.root.string;
3068 else
3069 {
3070 name = bfd_elf_string_from_elf_section (input_bfd,
3071 symtab_hdr->sh_link,
3072 sym->st_name);
3073 if (name == NULL)
3074 return FALSE;
3075 if (*name == '\0')
3076 name = bfd_section_name (input_bfd, sec);
3077 }
3078
3079 if (r == bfd_reloc_overflow)
3080 {
3081 if (!(info->callbacks->reloc_overflow
3082 (info, (h ? &h->root : NULL), name, howto->name,
3083 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
3084 return FALSE;
3085 }
3086 else
3087 {
3088 (*_bfd_error_handler)
3089 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3090 input_bfd, input_section,
3091 (long) rel->r_offset, name, (int) r);
3092 return FALSE;
3093 }
3094 }
3095 }
3096
3097 return TRUE;
3098 }
3099
3100 static asection *
3101 bfin_gc_mark_hook (asection * sec,
3102 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3103 Elf_Internal_Rela * rel,
3104 struct elf_link_hash_entry *h,
3105 Elf_Internal_Sym * sym)
3106 {
3107 if (h != NULL)
3108 {
3109 switch (ELF32_R_TYPE (rel->r_info))
3110 {
3111
3112 case R_BFIN_GNU_VTINHERIT:
3113 case R_BFIN_GNU_VTENTRY:
3114 break;
3115
3116 default:
3117 switch (h->root.type)
3118 {
3119 default:
3120 break;
3121
3122 case bfd_link_hash_defined:
3123 case bfd_link_hash_defweak:
3124 return h->root.u.def.section;
3125
3126 case bfd_link_hash_common:
3127 return h->root.u.c.p->section;
3128 }
3129 }
3130 }
3131 else
3132 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3133
3134 return NULL;
3135 }
3136
3137
3138 /* Update the got entry reference counts for the section being removed. */
3139
3140 static bfd_boolean
3141 bfinfdpic_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3142 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3143 asection *sec ATTRIBUTE_UNUSED,
3144 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3145 {
3146 return TRUE;
3147 }
3148
3149 /* Update the got entry reference counts for the section being removed. */
3150
3151 static bfd_boolean
3152 bfin_gc_sweep_hook (bfd * abfd,
3153 struct bfd_link_info *info,
3154 asection * sec,
3155 const Elf_Internal_Rela * relocs)
3156 {
3157 Elf_Internal_Shdr *symtab_hdr;
3158 struct elf_link_hash_entry **sym_hashes;
3159 bfd_signed_vma *local_got_refcounts;
3160 const Elf_Internal_Rela *rel, *relend;
3161 bfd *dynobj;
3162 asection *sgot;
3163 asection *srelgot;
3164
3165 dynobj = elf_hash_table (info)->dynobj;
3166 if (dynobj == NULL)
3167 return TRUE;
3168
3169 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3170 sym_hashes = elf_sym_hashes (abfd);
3171 local_got_refcounts = elf_local_got_refcounts (abfd);
3172
3173 sgot = bfd_get_section_by_name (dynobj, ".got");
3174 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3175
3176 relend = relocs + sec->reloc_count;
3177 for (rel = relocs; rel < relend; rel++)
3178 {
3179 unsigned long r_symndx;
3180 struct elf_link_hash_entry *h;
3181
3182 switch (ELF32_R_TYPE (rel->r_info))
3183 {
3184 case R_got:
3185 r_symndx = ELF32_R_SYM (rel->r_info);
3186 if (r_symndx >= symtab_hdr->sh_info)
3187 {
3188 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3189 if (h->got.refcount > 0)
3190 {
3191 --h->got.refcount;
3192 if (h->got.refcount == 0)
3193 {
3194 /* We don't need the .got entry any more. */
3195 sgot->size -= 4;
3196 srelgot->size -= sizeof (Elf32_External_Rela);
3197 }
3198 }
3199 }
3200 else if (local_got_refcounts != NULL)
3201 {
3202 if (local_got_refcounts[r_symndx] > 0)
3203 {
3204 --local_got_refcounts[r_symndx];
3205 if (local_got_refcounts[r_symndx] == 0)
3206 {
3207 /* We don't need the .got entry any more. */
3208 sgot->size -= 4;
3209 if (info->shared)
3210 srelgot->size -= sizeof (Elf32_External_Rela);
3211 }
3212 }
3213 }
3214 break;
3215 default:
3216 break;
3217 }
3218 }
3219 return TRUE;
3220 }
3221
3222 /* We need dynamic symbols for every section, since segments can
3223 relocate independently. */
3224 static bfd_boolean
3225 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3226 struct bfd_link_info *info
3227 ATTRIBUTE_UNUSED,
3228 asection *p ATTRIBUTE_UNUSED)
3229 {
3230 switch (elf_section_data (p)->this_hdr.sh_type)
3231 {
3232 case SHT_PROGBITS:
3233 case SHT_NOBITS:
3234 /* If sh_type is yet undecided, assume it could be
3235 SHT_PROGBITS/SHT_NOBITS. */
3236 case SHT_NULL:
3237 return FALSE;
3238
3239 /* There shouldn't be section relative relocations
3240 against any other section. */
3241 default:
3242 return TRUE;
3243 }
3244 }
3245
3246 /* Create a .got section, as well as its additional info field. This
3247 is almost entirely copied from
3248 elflink.c:_bfd_elf_create_got_section(). */
3249
3250 static bfd_boolean
3251 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3252 {
3253 flagword flags, pltflags;
3254 asection *s;
3255 struct elf_link_hash_entry *h;
3256 struct bfd_link_hash_entry *bh;
3257 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3258 int ptralign;
3259 int offset;
3260
3261 /* This function may be called more than once. */
3262 s = bfd_get_section_by_name (abfd, ".got");
3263 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
3264 return TRUE;
3265
3266 /* Machine specific: although pointers are 32-bits wide, we want the
3267 GOT to be aligned to a 64-bit boundary, such that function
3268 descriptors in it can be accessed with 64-bit loads and
3269 stores. */
3270 ptralign = 3;
3271
3272 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3273 | SEC_LINKER_CREATED);
3274 pltflags = flags;
3275
3276 s = bfd_make_section_with_flags (abfd, ".got", flags);
3277 if (s == NULL
3278 || !bfd_set_section_alignment (abfd, s, ptralign))
3279 return FALSE;
3280
3281 if (bed->want_got_plt)
3282 {
3283 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
3284 if (s == NULL
3285 || !bfd_set_section_alignment (abfd, s, ptralign))
3286 return FALSE;
3287 }
3288
3289 if (bed->want_got_sym)
3290 {
3291 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3292 (or .got.plt) section. We don't do this in the linker script
3293 because we don't want to define the symbol if we are not creating
3294 a global offset table. */
3295 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
3296 elf_hash_table (info)->hgot = h;
3297 if (h == NULL)
3298 return FALSE;
3299
3300 /* Machine-specific: we want the symbol for executables as
3301 well. */
3302 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3303 return FALSE;
3304 }
3305
3306 /* The first bit of the global offset table is the header. */
3307 s->size += bed->got_header_size;
3308
3309 /* This is the machine-specific part. Create and initialize section
3310 data for the got. */
3311 if (IS_FDPIC (abfd))
3312 {
3313 bfinfdpic_got_section (info) = s;
3314 bfinfdpic_relocs_info (info) = htab_try_create (1,
3315 bfinfdpic_relocs_info_hash,
3316 bfinfdpic_relocs_info_eq,
3317 (htab_del) NULL);
3318 if (! bfinfdpic_relocs_info (info))
3319 return FALSE;
3320
3321 s = bfd_make_section_with_flags (abfd, ".rel.got",
3322 (flags | SEC_READONLY));
3323 if (s == NULL
3324 || ! bfd_set_section_alignment (abfd, s, 2))
3325 return FALSE;
3326
3327 bfinfdpic_gotrel_section (info) = s;
3328
3329 /* Machine-specific. */
3330 s = bfd_make_section_with_flags (abfd, ".rofixup",
3331 (flags | SEC_READONLY));
3332 if (s == NULL
3333 || ! bfd_set_section_alignment (abfd, s, 2))
3334 return FALSE;
3335
3336 bfinfdpic_gotfixup_section (info) = s;
3337 offset = -2048;
3338 flags = BSF_GLOBAL;
3339 }
3340 else
3341 {
3342 offset = 2048;
3343 flags = BSF_GLOBAL | BSF_WEAK;
3344 }
3345
3346 return TRUE;
3347 }
3348
3349 /* Make sure the got and plt sections exist, and that our pointers in
3350 the link hash table point to them. */
3351
3352 static bfd_boolean
3353 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3354 {
3355 /* This is mostly copied from
3356 elflink.c:_bfd_elf_create_dynamic_sections(). */
3357 flagword flags, pltflags;
3358 asection *s;
3359 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3360
3361 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3362 .rel[a].bss sections. */
3363
3364 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3365 | SEC_LINKER_CREATED);
3366
3367 pltflags = flags;
3368 pltflags |= SEC_CODE;
3369 if (bed->plt_not_loaded)
3370 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3371 if (bed->plt_readonly)
3372 pltflags |= SEC_READONLY;
3373
3374 s = bfd_make_section (abfd, ".plt");
3375 if (s == NULL
3376 || ! bfd_set_section_flags (abfd, s, pltflags)
3377 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3378 return FALSE;
3379 /* Blackfin-specific: remember it. */
3380 bfinfdpic_plt_section (info) = s;
3381
3382 if (bed->want_plt_sym)
3383 {
3384 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3385 .plt section. */
3386 struct elf_link_hash_entry *h;
3387 struct bfd_link_hash_entry *bh = NULL;
3388
3389 if (! (_bfd_generic_link_add_one_symbol
3390 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3391 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3392 return FALSE;
3393 h = (struct elf_link_hash_entry *) bh;
3394 h->def_regular = 1;
3395 h->type = STT_OBJECT;
3396
3397 if (! info->executable
3398 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3399 return FALSE;
3400 }
3401
3402 /* Blackfin-specific: we want rel relocations for the plt. */
3403 s = bfd_make_section (abfd, ".rel.plt");
3404 if (s == NULL
3405 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3406 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3407 return FALSE;
3408 /* Blackfin-specific: remember it. */
3409 bfinfdpic_pltrel_section (info) = s;
3410
3411 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3412 if (! _bfin_create_got_section (abfd, info))
3413 return FALSE;
3414
3415 /* Blackfin-specific: make sure we created everything we wanted. */
3416 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3417 /* && bfinfdpic_gotfixup_section (info) */
3418 && bfinfdpic_plt_section (info)
3419 && bfinfdpic_pltrel_section (info));
3420
3421 if (bed->want_dynbss)
3422 {
3423 /* The .dynbss section is a place to put symbols which are defined
3424 by dynamic objects, are referenced by regular objects, and are
3425 not functions. We must allocate space for them in the process
3426 image and use a R_*_COPY reloc to tell the dynamic linker to
3427 initialize them at run time. The linker script puts the .dynbss
3428 section into the .bss section of the final image. */
3429 s = bfd_make_section (abfd, ".dynbss");
3430 if (s == NULL
3431 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
3432 return FALSE;
3433
3434 /* The .rel[a].bss section holds copy relocs. This section is not
3435 normally needed. We need to create it here, though, so that the
3436 linker will map it to an output section. We can't just create it
3437 only if we need it, because we will not know whether we need it
3438 until we have seen all the input files, and the first time the
3439 main linker code calls BFD after examining all the input files
3440 (size_dynamic_sections) the input sections have already been
3441 mapped to the output sections. If the section turns out not to
3442 be needed, we can discard it later. We will never need this
3443 section when generating a shared object, since they do not use
3444 copy relocs. */
3445 if (! info->shared)
3446 {
3447 s = bfd_make_section (abfd,
3448 (bed->default_use_rela_p
3449 ? ".rela.bss" : ".rel.bss"));
3450 if (s == NULL
3451 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3452 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3453 return FALSE;
3454 }
3455 }
3456
3457 return TRUE;
3458 }
3459
3460 /* The name of the dynamic interpreter. This is put in the .interp
3461 section. */
3462
3463 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3464
3465 #define DEFAULT_STACK_SIZE 0x20000
3466
3467 /* This structure is used to collect the number of entries present in
3468 each addressable range of the got. */
3469 struct _bfinfdpic_dynamic_got_info
3470 {
3471 /* Several bits of information about the current link. */
3472 struct bfd_link_info *info;
3473 /* Total size needed for GOT entries within the 18- or 32-bit
3474 ranges. */
3475 bfd_vma got17m4, gothilo;
3476 /* Total size needed for function descriptor entries within the 18-
3477 or 32-bit ranges. */
3478 bfd_vma fd17m4, fdhilo;
3479 /* Total size needed function descriptor entries referenced in PLT
3480 entries, that would be profitable to place in offsets close to
3481 the PIC register. */
3482 bfd_vma fdplt;
3483 /* Total size needed by lazy PLT entries. */
3484 bfd_vma lzplt;
3485 /* Number of relocations carried over from input object files. */
3486 unsigned long relocs;
3487 /* Number of fixups introduced by relocations in input object files. */
3488 unsigned long fixups;
3489 };
3490
3491 /* Compute the total GOT size required by each symbol in each range.
3492 Symbols may require up to 4 words in the GOT: an entry pointing to
3493 the symbol, an entry pointing to its function descriptor, and a
3494 private function descriptors taking two words. */
3495
3496 static int
3497 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3498 {
3499 struct bfinfdpic_relocs_info *entry = *entryp;
3500 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3501 unsigned relocs = 0, fixups = 0;
3502
3503 /* Allocate space for a GOT entry pointing to the symbol. */
3504 if (entry->got17m4)
3505 dinfo->got17m4 += 4;
3506 else if (entry->gothilo)
3507 dinfo->gothilo += 4;
3508 else
3509 entry->relocs32--;
3510 entry->relocs32++;
3511
3512 /* Allocate space for a GOT entry pointing to the function
3513 descriptor. */
3514 if (entry->fdgot17m4)
3515 dinfo->got17m4 += 4;
3516 else if (entry->fdgothilo)
3517 dinfo->gothilo += 4;
3518 else
3519 entry->relocsfd--;
3520 entry->relocsfd++;
3521
3522 /* Decide whether we need a PLT entry, a function descriptor in the
3523 GOT, and a lazy PLT entry for this symbol. */
3524 entry->plt = entry->call
3525 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3526 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3527 entry->privfd = entry->plt
3528 || entry->fdgoff17m4 || entry->fdgoffhilo
3529 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3530 && (entry->symndx != -1
3531 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3532 entry->lazyplt = entry->privfd
3533 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3534 && ! (dinfo->info->flags & DF_BIND_NOW)
3535 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3536
3537 /* Allocate space for a function descriptor. */
3538 if (entry->fdgoff17m4)
3539 dinfo->fd17m4 += 8;
3540 else if (entry->privfd && entry->plt)
3541 dinfo->fdplt += 8;
3542 else if (entry->privfd)
3543 dinfo->fdhilo += 8;
3544 else
3545 entry->relocsfdv--;
3546 entry->relocsfdv++;
3547
3548 if (entry->lazyplt)
3549 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3550
3551 if (!dinfo->info->executable || dinfo->info->pie)
3552 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3553 else
3554 {
3555 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3556 {
3557 if (entry->symndx != -1
3558 || entry->d.h->root.type != bfd_link_hash_undefweak)
3559 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3560 }
3561 else
3562 relocs += entry->relocs32 + entry->relocsfdv;
3563
3564 if (entry->symndx != -1
3565 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3566 {
3567 if (entry->symndx != -1
3568 || entry->d.h->root.type != bfd_link_hash_undefweak)
3569 fixups += entry->relocsfd;
3570 }
3571 else
3572 relocs += entry->relocsfd;
3573 }
3574
3575 entry->dynrelocs += relocs;
3576 entry->fixups += fixups;
3577 dinfo->relocs += relocs;
3578 dinfo->fixups += fixups;
3579
3580 return 1;
3581 }
3582
3583 /* This structure is used to assign offsets to got entries, function
3584 descriptors, plt entries and lazy plt entries. */
3585
3586 struct _bfinfdpic_dynamic_got_plt_info
3587 {
3588 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3589 struct _bfinfdpic_dynamic_got_info g;
3590
3591 /* For each addressable range, we record a MAX (positive) and MIN
3592 (negative) value. CUR is used to assign got entries, and it's
3593 incremented from an initial positive value to MAX, then from MIN
3594 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3595 assign function descriptors, and it's decreased from an initial
3596 non-positive value to MIN, then from MAX down to CUR (unless CUR
3597 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3598 to even words. ODD, if non-zero, indicates an odd word to be
3599 used for the next got entry, otherwise CUR is used and
3600 incremented by a pair of words, wrapping around when it reaches
3601 MAX. FDCUR is decremented (and wrapped) before the next function
3602 descriptor is chosen. FDPLT indicates the number of remaining
3603 slots that can be used for function descriptors used only by PLT
3604 entries. */
3605 struct _bfinfdpic_dynamic_got_alloc_data
3606 {
3607 bfd_signed_vma max, cur, odd, fdcur, min;
3608 bfd_vma fdplt;
3609 } got17m4, gothilo;
3610 };
3611
3612 /* Determine the positive and negative ranges to be used by each
3613 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3614 double-word boundary, are the minimum (negative) and maximum
3615 (positive) GOT offsets already used by previous ranges, except for
3616 an ODD entry that may have been left behind. GOT and FD indicate
3617 the size of GOT entries and function descriptors that must be
3618 placed within the range from -WRAP to WRAP. If there's room left,
3619 up to FDPLT bytes should be reserved for additional function
3620 descriptors. */
3621
3622 inline static bfd_signed_vma
3623 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3624 bfd_signed_vma fdcur,
3625 bfd_signed_vma odd,
3626 bfd_signed_vma cur,
3627 bfd_vma got,
3628 bfd_vma fd,
3629 bfd_vma fdplt,
3630 bfd_vma wrap)
3631 {
3632 bfd_signed_vma wrapmin = -wrap;
3633
3634 /* Start at the given initial points. */
3635 gad->fdcur = fdcur;
3636 gad->cur = cur;
3637
3638 /* If we had an incoming odd word and we have any got entries that
3639 are going to use it, consume it, otherwise leave gad->odd at
3640 zero. We might force gad->odd to zero and return the incoming
3641 odd such that it is used by the next range, but then GOT entries
3642 might appear to be out of order and we wouldn't be able to
3643 shorten the GOT by one word if it turns out to end with an
3644 unpaired GOT entry. */
3645 if (odd && got)
3646 {
3647 gad->odd = odd;
3648 got -= 4;
3649 odd = 0;
3650 }
3651 else
3652 gad->odd = 0;
3653
3654 /* If we're left with an unpaired GOT entry, compute its location
3655 such that we can return it. Otherwise, if got doesn't require an
3656 odd number of words here, either odd was already zero in the
3657 block above, or it was set to zero because got was non-zero, or
3658 got was already zero. In the latter case, we want the value of
3659 odd to carry over to the return statement, so we don't want to
3660 reset odd unless the condition below is true. */
3661 if (got & 4)
3662 {
3663 odd = cur + got;
3664 got += 4;
3665 }
3666
3667 /* Compute the tentative boundaries of this range. */
3668 gad->max = cur + got;
3669 gad->min = fdcur - fd;
3670 gad->fdplt = 0;
3671
3672 /* If function descriptors took too much space, wrap some of them
3673 around. */
3674 if (gad->min < wrapmin)
3675 {
3676 gad->max += wrapmin - gad->min;
3677 gad->min = wrapmin;
3678 }
3679 /* If there is space left and we have function descriptors
3680 referenced in PLT entries that could take advantage of shorter
3681 offsets, place them here. */
3682 else if (fdplt && gad->min > wrapmin)
3683 {
3684 bfd_vma fds;
3685 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3686 fds = gad->min - wrapmin;
3687 else
3688 fds = fdplt;
3689
3690 fdplt -= fds;
3691 gad->min -= fds;
3692 gad->fdplt += fds;
3693 }
3694
3695 /* If GOT entries took too much space, wrap some of them around.
3696 This may well cause gad->min to become lower than wrapmin. This
3697 will cause a relocation overflow later on, so we don't have to
3698 report it here . */
3699 if ((bfd_vma) gad->max > wrap)
3700 {
3701 gad->min -= gad->max - wrap;
3702 gad->max = wrap;
3703 }
3704 /* If there is more space left, try to place some more function
3705 descriptors for PLT entries. */
3706 else if (fdplt && (bfd_vma) gad->max < wrap)
3707 {
3708 bfd_vma fds;
3709 if ((bfd_vma) (wrap - gad->max) < fdplt)
3710 fds = wrap - gad->max;
3711 else
3712 fds = fdplt;
3713
3714 fdplt -= fds;
3715 gad->max += fds;
3716 gad->fdplt += fds;
3717 }
3718
3719 /* If odd was initially computed as an offset past the wrap point,
3720 wrap it around. */
3721 if (odd > gad->max)
3722 odd = gad->min + odd - gad->max;
3723
3724 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3725 before returning, so do it here too. This guarantees that,
3726 should cur and fdcur meet at the wrap point, they'll both be
3727 equal to min. */
3728 if (gad->cur == gad->max)
3729 gad->cur = gad->min;
3730
3731 return odd;
3732 }
3733
3734 /* Compute the location of the next GOT entry, given the allocation
3735 data for a range. */
3736
3737 inline static bfd_signed_vma
3738 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3739 {
3740 bfd_signed_vma ret;
3741
3742 if (gad->odd)
3743 {
3744 /* If there was an odd word left behind, use it. */
3745 ret = gad->odd;
3746 gad->odd = 0;
3747 }
3748 else
3749 {
3750 /* Otherwise, use the word pointed to by cur, reserve the next
3751 as an odd word, and skip to the next pair of words, possibly
3752 wrapping around. */
3753 ret = gad->cur;
3754 gad->odd = gad->cur + 4;
3755 gad->cur += 8;
3756 if (gad->cur == gad->max)
3757 gad->cur = gad->min;
3758 }
3759
3760 return ret;
3761 }
3762
3763 /* Compute the location of the next function descriptor entry in the
3764 GOT, given the allocation data for a range. */
3765
3766 inline static bfd_signed_vma
3767 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3768 {
3769 /* If we're at the bottom, wrap around, and only then allocate the
3770 next pair of words. */
3771 if (gad->fdcur == gad->min)
3772 gad->fdcur = gad->max;
3773 return gad->fdcur -= 8;
3774 }
3775
3776 /* Assign GOT offsets for every GOT entry and function descriptor.
3777 Doing everything in a single pass is tricky. */
3778
3779 static int
3780 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3781 {
3782 struct bfinfdpic_relocs_info *entry = *entryp;
3783 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3784
3785 if (entry->got17m4)
3786 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3787 else if (entry->gothilo)
3788 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3789
3790 if (entry->fdgot17m4)
3791 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3792 else if (entry->fdgothilo)
3793 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3794
3795 if (entry->fdgoff17m4)
3796 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3797 else if (entry->plt && dinfo->got17m4.fdplt)
3798 {
3799 dinfo->got17m4.fdplt -= 8;
3800 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3801 }
3802 else if (entry->plt)
3803 {
3804 dinfo->gothilo.fdplt -= 8;
3805 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3806 }
3807 else if (entry->privfd)
3808 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3809
3810 return 1;
3811 }
3812
3813 /* Assign GOT offsets to private function descriptors used by PLT
3814 entries (or referenced by 32-bit offsets), as well as PLT entries
3815 and lazy PLT entries. */
3816
3817 static int
3818 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3819 {
3820 struct bfinfdpic_relocs_info *entry = *entryp;
3821 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3822
3823 /* If this symbol requires a local function descriptor, allocate
3824 one. */
3825 if (entry->privfd && entry->fd_entry == 0)
3826 {
3827 if (dinfo->got17m4.fdplt)
3828 {
3829 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3830 dinfo->got17m4.fdplt -= 8;
3831 }
3832 else
3833 {
3834 BFD_ASSERT (dinfo->gothilo.fdplt);
3835 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3836 dinfo->gothilo.fdplt -= 8;
3837 }
3838 }
3839
3840 if (entry->plt)
3841 {
3842 int size;
3843
3844 /* We use the section's raw size to mark the location of the
3845 next PLT entry. */
3846 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3847
3848 /* Figure out the length of this PLT entry based on the
3849 addressing mode we need to reach the function descriptor. */
3850 BFD_ASSERT (entry->fd_entry);
3851 if (entry->fd_entry >= -(1 << (18 - 1))
3852 && entry->fd_entry + 4 < (1 << (18 - 1)))
3853 size = 10;
3854 else
3855 size = 16;
3856
3857 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3858 }
3859
3860 if (entry->lazyplt)
3861 {
3862 entry->lzplt_entry = dinfo->g.lzplt;
3863 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3864 /* If this entry is the one that gets the resolver stub, account
3865 for the additional instruction. */
3866 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3867 == BFINFDPIC_LZPLT_RESOLV_LOC)
3868 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3869 }
3870
3871 return 1;
3872 }
3873
3874 /* Follow indirect and warning hash entries so that each got entry
3875 points to the final symbol definition. P must point to a pointer
3876 to the hash table we're traversing. Since this traversal may
3877 modify the hash table, we set this pointer to NULL to indicate
3878 we've made a potentially-destructive change to the hash table, so
3879 the traversal must be restarted. */
3880 static int
3881 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
3882 {
3883 struct bfinfdpic_relocs_info *entry = *entryp;
3884 htab_t *htab = p;
3885
3886 if (entry->symndx == -1)
3887 {
3888 struct elf_link_hash_entry *h = entry->d.h;
3889 struct bfinfdpic_relocs_info *oentry;
3890
3891 while (h->root.type == bfd_link_hash_indirect
3892 || h->root.type == bfd_link_hash_warning)
3893 h = (struct elf_link_hash_entry *)h->root.u.i.link;
3894
3895 if (entry->d.h == h)
3896 return 1;
3897
3898 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
3899 NO_INSERT);
3900
3901 if (oentry)
3902 {
3903 /* Merge the two entries. */
3904 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
3905 htab_clear_slot (*htab, entryp);
3906 return 1;
3907 }
3908
3909 entry->d.h = h;
3910
3911 /* If we can't find this entry with the new bfd hash, re-insert
3912 it, and get the traversal restarted. */
3913 if (! htab_find (*htab, entry))
3914 {
3915 htab_clear_slot (*htab, entryp);
3916 entryp = htab_find_slot (*htab, entry, INSERT);
3917 if (! *entryp)
3918 *entryp = entry;
3919 /* Abort the traversal, since the whole table may have
3920 moved, and leave it up to the parent to restart the
3921 process. */
3922 *(htab_t *)p = NULL;
3923 return 0;
3924 }
3925 }
3926
3927 return 1;
3928 }
3929
3930 /* Set the sizes of the dynamic sections. */
3931
3932 static bfd_boolean
3933 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
3934 struct bfd_link_info *info)
3935 {
3936 bfd *dynobj;
3937 asection *s;
3938 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
3939 bfd_signed_vma odd;
3940 bfd_vma limit;
3941
3942 dynobj = elf_hash_table (info)->dynobj;
3943 BFD_ASSERT (dynobj != NULL);
3944
3945 if (elf_hash_table (info)->dynamic_sections_created)
3946 {
3947 /* Set the contents of the .interp section to the interpreter. */
3948 if (info->executable)
3949 {
3950 s = bfd_get_section_by_name (dynobj, ".interp");
3951 BFD_ASSERT (s != NULL);
3952 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3953 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
3954 }
3955 }
3956
3957 memset (&gpinfo, 0, sizeof (gpinfo));
3958 gpinfo.g.info = info;
3959
3960 for (;;)
3961 {
3962 htab_t relocs = bfinfdpic_relocs_info (info);
3963
3964 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
3965
3966 if (relocs == bfinfdpic_relocs_info (info))
3967 break;
3968 }
3969
3970 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
3971 &gpinfo.g);
3972
3973 odd = 12;
3974 /* Compute the total size taken by entries in the 18-bit range,
3975 to tell how many PLT function descriptors we can bring into it
3976 without causing it to overflow. */
3977 limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4;
3978 if (limit < (bfd_vma)1 << 18)
3979 limit = ((bfd_vma)1 << 18) - limit;
3980 else
3981 limit = 0;
3982 if (gpinfo.g.fdplt < limit)
3983 limit = gpinfo.g.fdplt;
3984
3985 /* Determine the ranges of GOT offsets that we can use for each
3986 range of addressing modes. */
3987 odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4,
3988 0,
3989 odd,
3990 16,
3991 gpinfo.g.got17m4,
3992 gpinfo.g.fd17m4,
3993 limit,
3994 (bfd_vma)1 << (18-1));
3995 odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo,
3996 gpinfo.got17m4.min,
3997 odd,
3998 gpinfo.got17m4.max,
3999 gpinfo.g.gothilo,
4000 gpinfo.g.fdhilo,
4001 gpinfo.g.fdplt - gpinfo.got17m4.fdplt,
4002 (bfd_vma)1 << (32-1));
4003
4004 /* Now assign (most) GOT offsets. */
4005 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4006 &gpinfo);
4007
4008 bfinfdpic_got_section (info)->size = gpinfo.gothilo.max
4009 - gpinfo.gothilo.min
4010 /* If an odd word is the last word of the GOT, we don't need this
4011 word to be part of the GOT. */
4012 - (odd + 4 == gpinfo.gothilo.max ? 4 : 0);
4013 if (bfinfdpic_got_section (info)->size == 0)
4014 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4015 else if (bfinfdpic_got_section (info)->size == 12
4016 && ! elf_hash_table (info)->dynamic_sections_created)
4017 {
4018 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4019 bfinfdpic_got_section (info)->size = 0;
4020 }
4021 else
4022 {
4023 bfinfdpic_got_section (info)->contents =
4024 (bfd_byte *) bfd_zalloc (dynobj,
4025 bfinfdpic_got_section (info)->size);
4026 if (bfinfdpic_got_section (info)->contents == NULL)
4027 return FALSE;
4028 }
4029
4030 if (elf_hash_table (info)->dynamic_sections_created)
4031 /* Subtract the number of lzplt entries, since those will generate
4032 relocations in the pltrel section. */
4033 bfinfdpic_gotrel_section (info)->size =
4034 (gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE)
4035 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4036 else
4037 BFD_ASSERT (gpinfo.g.relocs == 0);
4038 if (bfinfdpic_gotrel_section (info)->size == 0)
4039 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4040 else
4041 {
4042 bfinfdpic_gotrel_section (info)->contents =
4043 (bfd_byte *) bfd_zalloc (dynobj,
4044 bfinfdpic_gotrel_section (info)->size);
4045 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4046 return FALSE;
4047 }
4048
4049 bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4;
4050 if (bfinfdpic_gotfixup_section (info)->size == 0)
4051 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4052 else
4053 {
4054 bfinfdpic_gotfixup_section (info)->contents =
4055 (bfd_byte *) bfd_zalloc (dynobj,
4056 bfinfdpic_gotfixup_section (info)->size);
4057 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4058 return FALSE;
4059 }
4060
4061 if (elf_hash_table (info)->dynamic_sections_created)
4062 {
4063 bfinfdpic_pltrel_section (info)->size =
4064 gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4065 if (bfinfdpic_pltrel_section (info)->size == 0)
4066 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4067 else
4068 {
4069 bfinfdpic_pltrel_section (info)->contents =
4070 (bfd_byte *) bfd_zalloc (dynobj,
4071 bfinfdpic_pltrel_section (info)->size);
4072 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4073 return FALSE;
4074 }
4075 }
4076
4077 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4078 such that there's room for the additional instruction needed to
4079 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4080 account for them, our block size is 4 bytes smaller than the real
4081 block size. */
4082 if (elf_hash_table (info)->dynamic_sections_created)
4083 {
4084 bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt
4085 + ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4086 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4087 }
4088
4089 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4090 actually assign lazy PLT entries addresses. */
4091 gpinfo.g.lzplt = 0;
4092
4093 /* Save information that we're going to need to generate GOT and PLT
4094 entries. */
4095 bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min;
4096
4097 if (get_elf_backend_data (output_bfd)->want_got_sym)
4098 elf_hash_table (info)->hgot->root.u.def.value
4099 += bfinfdpic_got_initial_offset (info);
4100
4101 if (elf_hash_table (info)->dynamic_sections_created)
4102 bfinfdpic_plt_initial_offset (info) =
4103 bfinfdpic_plt_section (info)->size;
4104
4105 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4106 &gpinfo);
4107
4108 /* Allocate the PLT section contents only after
4109 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4110 non-lazy PLT entries. */
4111 if (elf_hash_table (info)->dynamic_sections_created)
4112 {
4113 if (bfinfdpic_plt_section (info)->size == 0)
4114 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4115 else
4116 {
4117 bfinfdpic_plt_section (info)->contents =
4118 (bfd_byte *) bfd_zalloc (dynobj,
4119 bfinfdpic_plt_section (info)->size);
4120 if (bfinfdpic_plt_section (info)->contents == NULL)
4121 return FALSE;
4122 }
4123 }
4124
4125 if (elf_hash_table (info)->dynamic_sections_created)
4126 {
4127 if (bfinfdpic_got_section (info)->size)
4128 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4129 return FALSE;
4130
4131 if (bfinfdpic_pltrel_section (info)->size)
4132 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4133 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4134 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4135 return FALSE;
4136
4137 if (bfinfdpic_gotrel_section (info)->size)
4138 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4139 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4140 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4141 sizeof (Elf32_External_Rel)))
4142 return FALSE;
4143 }
4144
4145 return TRUE;
4146 }
4147
4148 static bfd_boolean
4149 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4150 struct bfd_link_info *info)
4151 {
4152 if (!info->relocatable)
4153 {
4154 struct elf_link_hash_entry *h;
4155 asection *sec;
4156
4157 /* Force a PT_GNU_STACK segment to be created. */
4158 if (! elf_tdata (output_bfd)->stack_flags)
4159 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
4160
4161 /* Define __stacksize if it's not defined yet. */
4162 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4163 FALSE, FALSE, FALSE);
4164 if (! h || h->root.type != bfd_link_hash_defined
4165 || h->type != STT_OBJECT
4166 || !h->def_regular)
4167 {
4168 struct bfd_link_hash_entry *bh = NULL;
4169
4170 if (!(_bfd_generic_link_add_one_symbol
4171 (info, output_bfd, "__stacksize",
4172 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
4173 (const char *) NULL, FALSE,
4174 get_elf_backend_data (output_bfd)->collect, &bh)))
4175 return FALSE;
4176
4177 h = (struct elf_link_hash_entry *) bh;
4178 h->def_regular = 1;
4179 h->type = STT_OBJECT;
4180 }
4181
4182 /* Create a stack section, and set its alignment. */
4183 sec = bfd_make_section (output_bfd, ".stack");
4184
4185 if (sec == NULL
4186 || ! bfd_set_section_alignment (output_bfd, sec, 3))
4187 return FALSE;
4188 }
4189
4190 return TRUE;
4191 }
4192
4193 static bfd_boolean
4194 elf32_bfinfdpic_modify_segment_map (bfd *output_bfd,
4195 struct bfd_link_info *info)
4196 {
4197 struct elf_segment_map *m;
4198
4199 /* objcopy and strip preserve what's already there using
4200 elf32_bfinfdpic_copy_private_bfd_data (). */
4201 if (! info)
4202 return TRUE;
4203
4204 for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
4205 if (m->p_type == PT_GNU_STACK)
4206 break;
4207
4208 if (m)
4209 {
4210 asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
4211 struct elf_link_hash_entry *h;
4212
4213 if (sec)
4214 {
4215 /* Obtain the pointer to the __stacksize symbol. */
4216 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4217 FALSE, FALSE, FALSE);
4218 while (h->root.type == bfd_link_hash_indirect
4219 || h->root.type == bfd_link_hash_warning)
4220 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4221 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4222
4223 /* Set the section size from the symbol value. We
4224 intentionally ignore the symbol section. */
4225 if (h->root.type == bfd_link_hash_defined)
4226 sec->size = h->root.u.def.value;
4227 else
4228 sec->size = DEFAULT_STACK_SIZE;
4229
4230 /* Add the stack section to the PT_GNU_STACK segment,
4231 such that its size and alignment requirements make it
4232 to the segment. */
4233 m->sections[m->count] = sec;
4234 m->count++;
4235 }
4236 }
4237
4238 return TRUE;
4239 }
4240
4241 static bfd_boolean
4242 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4243 struct bfd_link_info *info)
4244 {
4245 bfd *dynobj;
4246 asection *sdyn;
4247
4248 dynobj = elf_hash_table (info)->dynobj;
4249
4250 if (bfinfdpic_got_section (info))
4251 {
4252 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4253 == (bfinfdpic_gotrel_section (info)->reloc_count
4254 * sizeof (Elf32_External_Rel)));
4255
4256 if (bfinfdpic_gotfixup_section (info))
4257 {
4258 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4259 bfd_vma got_value = hgot->root.u.def.value
4260 + hgot->root.u.def.section->output_section->vma
4261 + hgot->root.u.def.section->output_offset;
4262
4263 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4264 got_value, 0);
4265
4266 if (bfinfdpic_gotfixup_section (info)->size
4267 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4268 {
4269 (*_bfd_error_handler)
4270 ("LINKER BUG: .rofixup section size mismatch");
4271 return FALSE;
4272 }
4273 }
4274 }
4275 if (elf_hash_table (info)->dynamic_sections_created)
4276 {
4277 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4278 == (bfinfdpic_pltrel_section (info)->reloc_count
4279 * sizeof (Elf32_External_Rel)));
4280 }
4281
4282 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4283
4284 if (elf_hash_table (info)->dynamic_sections_created)
4285 {
4286 Elf32_External_Dyn * dyncon;
4287 Elf32_External_Dyn * dynconend;
4288
4289 BFD_ASSERT (sdyn != NULL);
4290
4291 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4292 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4293
4294 for (; dyncon < dynconend; dyncon++)
4295 {
4296 Elf_Internal_Dyn dyn;
4297
4298 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4299
4300 switch (dyn.d_tag)
4301 {
4302 default:
4303 break;
4304
4305 case DT_PLTGOT:
4306 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4307 + bfinfdpic_got_section (info)->output_offset
4308 + bfinfdpic_got_initial_offset (info);
4309 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4310 break;
4311
4312 case DT_JMPREL:
4313 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4314 ->output_section->vma
4315 + bfinfdpic_pltrel_section (info)->output_offset;
4316 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4317 break;
4318
4319 case DT_PLTRELSZ:
4320 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4321 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4322 break;
4323 }
4324 }
4325 }
4326
4327 return TRUE;
4328 }
4329
4330 /* Adjust a symbol defined by a dynamic object and referenced by a
4331 regular object. */
4332
4333 static bfd_boolean
4334 elf32_bfinfdpic_adjust_dynamic_symbol
4335 (struct bfd_link_info *info ATTRIBUTE_UNUSED,
4336 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
4337 {
4338 bfd * dynobj;
4339
4340 dynobj = elf_hash_table (info)->dynobj;
4341
4342 /* Make sure we know what is going on here. */
4343 BFD_ASSERT (dynobj != NULL
4344 && (h->u.weakdef != NULL
4345 || (h->def_dynamic
4346 && h->ref_regular
4347 && !h->def_regular)));
4348
4349 /* If this is a weak symbol, and there is a real definition, the
4350 processor independent code will have arranged for us to see the
4351 real definition first, and we can just use the same value. */
4352 if (h->u.weakdef != NULL)
4353 {
4354 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4355 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4356 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4357 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4358 }
4359
4360 return TRUE;
4361 }
4362
4363 /* Perform any actions needed for dynamic symbols. */
4364
4365 static bfd_boolean
4366 elf32_bfinfdpic_finish_dynamic_symbol
4367 (bfd *output_bfd ATTRIBUTE_UNUSED,
4368 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4369 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4370 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4371 {
4372 return TRUE;
4373 }
4374
4375 /* Decide whether to attempt to turn absptr or lsda encodings in
4376 shared libraries into pcrel within the given input section. */
4377
4378 static bfd_boolean
4379 bfinfdpic_elf_use_relative_eh_frame
4380 (bfd *input_bfd ATTRIBUTE_UNUSED,
4381 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4382 asection *eh_frame_section ATTRIBUTE_UNUSED)
4383 {
4384 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4385 return FALSE;
4386 }
4387
4388 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4389
4390 static bfd_byte
4391 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4392 struct bfd_link_info *info,
4393 asection *osec, bfd_vma offset,
4394 asection *loc_sec, bfd_vma loc_offset,
4395 bfd_vma *encoded)
4396 {
4397 struct elf_link_hash_entry *h;
4398
4399 h = elf_hash_table (info)->hgot;
4400 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4401
4402 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4403 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4404 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4405 loc_sec, loc_offset, encoded);
4406
4407 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4408 == (_bfinfdpic_osec_to_segment
4409 (abfd, h->root.u.def.section->output_section)));
4410
4411 *encoded = osec->vma + offset
4412 - (h->root.u.def.value
4413 + h->root.u.def.section->output_section->vma
4414 + h->root.u.def.section->output_offset);
4415
4416 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4417 }
4418
4419
4420
4421 /* Look through the relocs for a section during the first phase.
4422
4423 Besides handling virtual table relocs for gc, we have to deal with
4424 all sorts of PIC-related relocations. We describe below the
4425 general plan on how to handle such relocations, even though we only
4426 collect information at this point, storing them in hash tables for
4427 perusal of later passes.
4428
4429 32 relocations are propagated to the linker output when creating
4430 position-independent output. LO16 and HI16 relocations are not
4431 supposed to be encountered in this case.
4432
4433 LABEL16 should always be resolvable by the linker, since it's only
4434 used by branches.
4435
4436 LABEL24, on the other hand, is used by calls. If it turns out that
4437 the target of a call is a dynamic symbol, a PLT entry must be
4438 created for it, which triggers the creation of a private function
4439 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4440
4441 GPREL relocations require the referenced symbol to be in the same
4442 segment as _gp, but this can only be checked later.
4443
4444 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4445 exist. LABEL24 might as well, since it may require a PLT entry,
4446 that will require a got.
4447
4448 Non-FUNCDESC GOT relocations require a GOT entry to be created
4449 regardless of whether the symbol is dynamic. However, since a
4450 global symbol that turns out to not be exported may have the same
4451 address of a non-dynamic symbol, we don't assign GOT entries at
4452 this point, such that we can share them in this case. A relocation
4453 for the GOT entry always has to be created, be it to offset a
4454 private symbol by the section load address, be it to get the symbol
4455 resolved dynamically.
4456
4457 FUNCDESC GOT relocations require a GOT entry to be created, and
4458 handled as if a FUNCDESC relocation was applied to the GOT entry in
4459 an object file.
4460
4461 FUNCDESC relocations referencing a symbol that turns out to NOT be
4462 dynamic cause a private function descriptor to be created. The
4463 FUNCDESC relocation then decays to a 32 relocation that points at
4464 the private descriptor. If the symbol is dynamic, the FUNCDESC
4465 relocation is propagated to the linker output, such that the
4466 dynamic linker creates the canonical descriptor, pointing to the
4467 dynamically-resolved definition of the function.
4468
4469 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4470 symbols that are assigned to the same segment as the GOT, but we
4471 can only check this later, after we know the complete set of
4472 symbols defined and/or exported.
4473
4474 FUNCDESC GOTOFF relocations require a function descriptor to be
4475 created and, unless lazy binding is disabled or the symbol is not
4476 dynamic, a lazy PLT entry. Since we can't tell at this point
4477 whether a symbol is going to be dynamic, we have to decide later
4478 whether to create a lazy PLT entry or bind the descriptor directly
4479 to the private function.
4480
4481 FUNCDESC_VALUE relocations are not supposed to be present in object
4482 files, but they may very well be simply propagated to the linker
4483 output, since they have no side effect.
4484
4485
4486 A function descriptor always requires a FUNCDESC_VALUE relocation.
4487 Whether it's in .plt.rel or not depends on whether lazy binding is
4488 enabled and on whether the referenced symbol is dynamic.
4489
4490 The existence of a lazy PLT requires the resolverStub lazy PLT
4491 entry to be present.
4492
4493
4494 As for assignment of GOT, PLT and lazy PLT entries, and private
4495 descriptors, we might do them all sequentially, but we can do
4496 better than that. For example, we can place GOT entries and
4497 private function descriptors referenced using 12-bit operands
4498 closer to the PIC register value, such that these relocations don't
4499 overflow. Those that are only referenced with LO16 relocations
4500 could come next, but we may as well place PLT-required function
4501 descriptors in the 12-bit range to make them shorter. Symbols
4502 referenced with LO16/HI16 may come next, but we may place
4503 additional function descriptors in the 16-bit range if we can
4504 reliably tell that we've already placed entries that are ever
4505 referenced with only LO16. PLT entries are therefore generated as
4506 small as possible, while not introducing relocation overflows in
4507 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4508 generated before or after PLT entries, but not intermingled with
4509 them, such that we can have more lazy PLT entries in range for a
4510 branch to the resolverStub. The resolverStub should be emitted at
4511 the most distant location from the first lazy PLT entry such that
4512 it's still in range for a branch, or closer, if there isn't a need
4513 for so many lazy PLT entries. Additional lazy PLT entries may be
4514 emitted after the resolverStub, as long as branches are still in
4515 range. If the branch goes out of range, longer lazy PLT entries
4516 are emitted.
4517
4518 We could further optimize PLT and lazy PLT entries by giving them
4519 priority in assignment to closer-to-gr17 locations depending on the
4520 number of occurrences of references to them (assuming a function
4521 that's called more often is more important for performance, so its
4522 PLT entry should be faster), or taking hints from the compiler.
4523 Given infinite time and money... :-) */
4524
4525 static bfd_boolean
4526 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4527 asection *sec, const Elf_Internal_Rela *relocs)
4528 {
4529 Elf_Internal_Shdr *symtab_hdr;
4530 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4531 const Elf_Internal_Rela *rel;
4532 const Elf_Internal_Rela *rel_end;
4533 bfd *dynobj;
4534 struct bfinfdpic_relocs_info *picrel;
4535
4536 if (info->relocatable)
4537 return TRUE;
4538
4539 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4540 sym_hashes = elf_sym_hashes (abfd);
4541 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4542 if (!elf_bad_symtab (abfd))
4543 sym_hashes_end -= symtab_hdr->sh_info;
4544
4545 dynobj = elf_hash_table (info)->dynobj;
4546 rel_end = relocs + sec->reloc_count;
4547 for (rel = relocs; rel < rel_end; rel++)
4548 {
4549 struct elf_link_hash_entry *h;
4550 unsigned long r_symndx;
4551
4552 r_symndx = ELF32_R_SYM (rel->r_info);
4553 if (r_symndx < symtab_hdr->sh_info)
4554 h = NULL;
4555 else
4556 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4557
4558 switch (ELF32_R_TYPE (rel->r_info))
4559 {
4560 case R_BFIN_GOT17M4:
4561 case R_BFIN_GOTHI:
4562 case R_BFIN_GOTLO:
4563 case R_BFIN_FUNCDESC_GOT17M4:
4564 case R_BFIN_FUNCDESC_GOTHI:
4565 case R_BFIN_FUNCDESC_GOTLO:
4566 case R_BFIN_GOTOFF17M4:
4567 case R_BFIN_GOTOFFHI:
4568 case R_BFIN_GOTOFFLO:
4569 case R_BFIN_FUNCDESC_GOTOFF17M4:
4570 case R_BFIN_FUNCDESC_GOTOFFHI:
4571 case R_BFIN_FUNCDESC_GOTOFFLO:
4572 case R_BFIN_FUNCDESC:
4573 case R_BFIN_FUNCDESC_VALUE:
4574 if (! IS_FDPIC (abfd))
4575 goto bad_reloc;
4576 /* Fall through. */
4577 case R_pcrel24:
4578 case R_pcrel24_jump_l:
4579 case R_byte4_data:
4580 if (IS_FDPIC (abfd) && ! dynobj)
4581 {
4582 elf_hash_table (info)->dynobj = dynobj = abfd;
4583 if (! _bfin_create_got_section (abfd, info))
4584 return FALSE;
4585 }
4586 if (! IS_FDPIC (abfd))
4587 {
4588 picrel = NULL;
4589 break;
4590 }
4591 if (h != NULL)
4592 {
4593 if (h->dynindx == -1)
4594 switch (ELF_ST_VISIBILITY (h->other))
4595 {
4596 case STV_INTERNAL:
4597 case STV_HIDDEN:
4598 break;
4599 default:
4600 bfd_elf_link_record_dynamic_symbol (info, h);
4601 break;
4602 }
4603 picrel
4604 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4605 abfd, h,
4606 rel->r_addend, INSERT);
4607 }
4608 else
4609 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4610 (info), abfd, r_symndx,
4611 rel->r_addend, INSERT);
4612 if (! picrel)
4613 return FALSE;
4614 break;
4615
4616 default:
4617 picrel = NULL;
4618 break;
4619 }
4620
4621 switch (ELF32_R_TYPE (rel->r_info))
4622 {
4623 case R_pcrel24:
4624 case R_pcrel24_jump_l:
4625 if (IS_FDPIC (abfd))
4626 picrel->call = 1;
4627 break;
4628
4629 case R_BFIN_FUNCDESC_VALUE:
4630 picrel->relocsfdv++;
4631 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4632 picrel->relocs32--;
4633 /* Fall through. */
4634
4635 case R_byte4_data:
4636 if (! IS_FDPIC (abfd))
4637 break;
4638
4639 picrel->sym = 1;
4640 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4641 picrel->relocs32++;
4642 break;
4643
4644 case R_BFIN_GOT17M4:
4645 picrel->got17m4 = 1;
4646 break;
4647
4648 case R_BFIN_GOTHI:
4649 case R_BFIN_GOTLO:
4650 picrel->gothilo = 1;
4651 break;
4652
4653 case R_BFIN_FUNCDESC_GOT17M4:
4654 picrel->fdgot17m4 = 1;
4655 break;
4656
4657 case R_BFIN_FUNCDESC_GOTHI:
4658 case R_BFIN_FUNCDESC_GOTLO:
4659 picrel->fdgothilo = 1;
4660 break;
4661
4662 case R_BFIN_GOTOFF17M4:
4663 case R_BFIN_GOTOFFHI:
4664 case R_BFIN_GOTOFFLO:
4665 picrel->gotoff = 1;
4666 break;
4667
4668 case R_BFIN_FUNCDESC_GOTOFF17M4:
4669 picrel->fdgoff17m4 = 1;
4670 break;
4671
4672 case R_BFIN_FUNCDESC_GOTOFFHI:
4673 case R_BFIN_FUNCDESC_GOTOFFLO:
4674 picrel->fdgoffhilo = 1;
4675 break;
4676
4677 case R_BFIN_FUNCDESC:
4678 picrel->fd = 1;
4679 picrel->relocsfd++;
4680 break;
4681
4682 /* This relocation describes the C++ object vtable hierarchy.
4683 Reconstruct it for later use during GC. */
4684 case R_BFIN_GNU_VTINHERIT:
4685 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4686 return FALSE;
4687 break;
4688
4689 /* This relocation describes which C++ vtable entries are actually
4690 used. Record for later use during GC. */
4691 case R_BFIN_GNU_VTENTRY:
4692 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4693 return FALSE;
4694 break;
4695
4696 case R_huimm16:
4697 case R_luimm16:
4698 case R_pcrel12_jump_s:
4699 case R_pcrel10:
4700 break;
4701
4702 default:
4703 bad_reloc:
4704 (*_bfd_error_handler)
4705 (_("%B: unsupported relocation type %i"),
4706 abfd, ELF32_R_TYPE (rel->r_info));
4707 return FALSE;
4708 }
4709 }
4710
4711 return TRUE;
4712 }
4713
4714 /* Set the right machine number for a Blackfin ELF file. */
4715
4716 static bfd_boolean
4717 elf32_bfin_object_p (bfd *abfd)
4718 {
4719 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4720 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4721 == (IS_FDPIC (abfd)));
4722 }
4723
4724 static bfd_boolean
4725 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4726 {
4727 elf_elfheader (abfd)->e_flags = flags;
4728 elf_flags_init (abfd) = TRUE;
4729 return TRUE;
4730 }
4731
4732 /* Copy backend specific data from one object module to another. */
4733
4734 static bfd_boolean
4735 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4736 {
4737 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4738 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4739 return TRUE;
4740
4741 BFD_ASSERT (!elf_flags_init (obfd)
4742 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
4743
4744 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
4745 elf_flags_init (obfd) = TRUE;
4746 return TRUE;
4747 }
4748
4749 static bfd_boolean
4750 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4751 {
4752 unsigned i;
4753
4754 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4755 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4756 return TRUE;
4757
4758 if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
4759 return FALSE;
4760
4761 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
4762 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
4763 return TRUE;
4764
4765 /* Copy the stack size. */
4766 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
4767 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
4768 {
4769 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
4770
4771 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
4772 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
4773 {
4774 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
4775
4776 /* Rewrite the phdrs, since we're only called after they
4777 were first written. */
4778 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
4779 ->s->sizeof_ehdr, SEEK_SET) != 0
4780 || get_elf_backend_data (obfd)->s
4781 ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
4782 elf_elfheader (obfd)->e_phnum) != 0)
4783 return FALSE;
4784 break;
4785 }
4786
4787 break;
4788 }
4789
4790 return TRUE;
4791 }
4792
4793
4794 /* Display the flags field. */
4795 static bfd_boolean
4796 elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
4797 {
4798 FILE *file = (FILE *) ptr;
4799 flagword flags;
4800
4801 BFD_ASSERT (abfd != NULL && ptr != NULL);
4802
4803 /* Print normal ELF private data. */
4804 _bfd_elf_print_private_bfd_data (abfd, ptr);
4805
4806 flags = elf_elfheader (abfd)->e_flags;
4807
4808 /* xgettext:c-format */
4809 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4810
4811 if (flags & EF_BFIN_PIC)
4812 fprintf (file, " -fpic");
4813
4814 if (flags & EF_BFIN_FDPIC)
4815 fprintf (file, " -mfdpic");
4816
4817 fputc ('\n', file);
4818
4819 return TRUE;
4820 }
4821
4822 /* Merge backend specific data from an object file to the output
4823 object file when linking. */
4824
4825 static bfd_boolean
4826 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4827 {
4828 flagword old_flags, old_partial;
4829 flagword new_flags, new_partial;
4830 bfd_boolean error = FALSE;
4831
4832 new_flags = elf_elfheader (ibfd)->e_flags;
4833 old_flags = elf_elfheader (obfd)->e_flags;
4834
4835 if (new_flags & EF_BFIN_FDPIC)
4836 new_flags &= ~EF_BFIN_PIC;
4837
4838 #ifdef DEBUG
4839 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4840 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
4841 bfd_get_filename (ibfd));
4842 #endif
4843
4844 if (!elf_flags_init (obfd)) /* First call, no flags set. */
4845 {
4846 elf_flags_init (obfd) = TRUE;
4847 old_flags = new_flags;
4848 }
4849
4850 else if (new_flags == old_flags) /* Compatible flags are ok. */
4851 ;
4852
4853 else /* Possibly incompatible flags. */
4854 {
4855 /* We don't have to do anything if the pic flags are the same, or the new
4856 module(s) were compiled with -mlibrary-pic. */
4857 new_partial = (new_flags & EF_BFIN_PIC_FLAGS);
4858 old_partial = (old_flags & EF_BFIN_PIC_FLAGS);
4859 if (new_partial == old_partial)
4860 ;
4861
4862 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
4863 else if (new_partial != 0 && old_partial != 0)
4864 old_flags |= new_partial;
4865
4866 /* One module was compiled for pic and the other was not, see if we have
4867 had any relocations that are not pic-safe. */
4868 else
4869 old_flags |= new_partial;
4870
4871 }
4872
4873 /* Update the old flags now with changes made above. */
4874 elf_elfheader (obfd)->e_flags = old_flags;
4875
4876 if (((new_flags & EF_BFIN_FDPIC) == 0)
4877 != (! IS_FDPIC (ibfd)))
4878 {
4879 error = TRUE;
4880 if (IS_FDPIC (obfd))
4881 (*_bfd_error_handler)
4882 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4883 bfd_get_filename (ibfd));
4884 else
4885 (*_bfd_error_handler)
4886 (_("%s: cannot link fdpic object file into non-fdpic executable"),
4887 bfd_get_filename (ibfd));
4888 }
4889
4890 if (error)
4891 bfd_set_error (bfd_error_bad_value);
4892
4893 return !error;
4894 }
4895 \f
4896 /* bfin ELF linker hash entry. */
4897
4898 struct bfin_link_hash_entry
4899 {
4900 struct elf_link_hash_entry root;
4901
4902 /* Number of PC relative relocs copied for this symbol. */
4903 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
4904 };
4905
4906 /* bfin ELF linker hash table. */
4907
4908 struct bfin_link_hash_table
4909 {
4910 struct elf_link_hash_table root;
4911
4912 /* Small local sym to section mapping cache. */
4913 struct sym_sec_cache sym_sec;
4914 };
4915
4916 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4917
4918 static struct bfd_hash_entry *
4919 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
4920 struct bfd_hash_table *table, const char *string)
4921 {
4922 struct bfd_hash_entry *ret = entry;
4923
4924 /* Allocate the structure if it has not already been allocated by a
4925 subclass. */
4926 if (ret == NULL)
4927 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
4928 if (ret == NULL)
4929 return ret;
4930
4931 /* Call the allocation method of the superclass. */
4932 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
4933 if (ret != NULL)
4934 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
4935
4936 return ret;
4937 }
4938
4939 /* Create an bfin ELF linker hash table. */
4940
4941 static struct bfd_link_hash_table *
4942 bfin_link_hash_table_create (bfd * abfd)
4943 {
4944 struct bfin_link_hash_table *ret;
4945 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
4946
4947 ret = bfd_zalloc (abfd, amt);
4948 if (ret == NULL)
4949 return NULL;
4950
4951 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
4952 bfin_link_hash_newfunc,
4953 sizeof (struct elf_link_hash_entry)))
4954 {
4955 free (ret);
4956 return NULL;
4957 }
4958
4959 ret->sym_sec.abfd = NULL;
4960
4961 return &ret->root.root;
4962 }
4963
4964 /* The size in bytes of an entry in the procedure linkage table. */
4965
4966 /* Finish up the dynamic sections. */
4967
4968 static bfd_boolean
4969 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4970 struct bfd_link_info *info)
4971 {
4972 bfd *dynobj;
4973 asection *sdyn;
4974
4975 dynobj = elf_hash_table (info)->dynobj;
4976
4977 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4978
4979 if (elf_hash_table (info)->dynamic_sections_created)
4980 {
4981 Elf32_External_Dyn *dyncon, *dynconend;
4982
4983 BFD_ASSERT (sdyn != NULL);
4984
4985 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4986 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4987 for (; dyncon < dynconend; dyncon++)
4988 {
4989 Elf_Internal_Dyn dyn;
4990
4991 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4992
4993 }
4994
4995 }
4996 return TRUE;
4997 }
4998
4999 /* Finish up dynamic symbol handling. We set the contents of various
5000 dynamic sections here. */
5001
5002 static bfd_boolean
5003 bfin_finish_dynamic_symbol (bfd * output_bfd,
5004 struct bfd_link_info *info,
5005 struct elf_link_hash_entry *h,
5006 Elf_Internal_Sym * sym)
5007 {
5008 bfd *dynobj;
5009
5010 dynobj = elf_hash_table (info)->dynobj;
5011
5012 if (h->got.offset != (bfd_vma) - 1)
5013 {
5014 asection *sgot;
5015 asection *srela;
5016 Elf_Internal_Rela rela;
5017 bfd_byte *loc;
5018
5019 /* This symbol has an entry in the global offset table.
5020 Set it up. */
5021
5022 sgot = bfd_get_section_by_name (dynobj, ".got");
5023 srela = bfd_get_section_by_name (dynobj, ".rela.got");
5024 BFD_ASSERT (sgot != NULL && srela != NULL);
5025
5026 rela.r_offset = (sgot->output_section->vma
5027 + sgot->output_offset
5028 + (h->got.offset & ~(bfd_vma) 1));
5029
5030 /* If this is a -Bsymbolic link, and the symbol is defined
5031 locally, we just want to emit a RELATIVE reloc. Likewise if
5032 the symbol was forced to be local because of a version file.
5033 The entry in the global offset table will already have been
5034 initialized in the relocate_section function. */
5035 if (info->shared
5036 && (info->symbolic
5037 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5038 {
5039 fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__);
5040 rela.r_info = ELF32_R_INFO (0, R_pcrel24);
5041 rela.r_addend = bfd_get_signed_32 (output_bfd,
5042 (sgot->contents
5043 +
5044 (h->got.
5045 offset & ~(bfd_vma) 1)));
5046 }
5047 else
5048 {
5049 bfd_put_32 (output_bfd, (bfd_vma) 0,
5050 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5051 rela.r_info = ELF32_R_INFO (h->dynindx, R_got);
5052 rela.r_addend = 0;
5053 }
5054
5055 loc = srela->contents;
5056 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5057 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5058 }
5059
5060 if (h->needs_copy)
5061 {
5062 BFD_ASSERT (0);
5063 }
5064 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5065 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5066 || h == elf_hash_table (info)->hgot)
5067 sym->st_shndx = SHN_ABS;
5068
5069 return TRUE;
5070 }
5071
5072 /* Adjust a symbol defined by a dynamic object and referenced by a
5073 regular object. The current definition is in some section of the
5074 dynamic object, but we're not including those sections. We have to
5075 change the definition to something the rest of the link can
5076 understand. */
5077
5078 static bfd_boolean
5079 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5080 struct elf_link_hash_entry *h)
5081 {
5082 bfd *dynobj;
5083 asection *s;
5084 unsigned int power_of_two;
5085
5086 dynobj = elf_hash_table (info)->dynobj;
5087
5088 /* Make sure we know what is going on here. */
5089 BFD_ASSERT (dynobj != NULL
5090 && (h->needs_plt
5091 || h->u.weakdef != NULL
5092 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5093
5094 /* If this is a function, put it in the procedure linkage table. We
5095 will fill in the contents of the procedure linkage table later,
5096 when we know the address of the .got section. */
5097 if (h->type == STT_FUNC || h->needs_plt)
5098 {
5099 BFD_ASSERT(0);
5100 }
5101
5102 /* If this is a weak symbol, and there is a real definition, the
5103 processor independent code will have arranged for us to see the
5104 real definition first, and we can just use the same value. */
5105 if (h->u.weakdef != NULL)
5106 {
5107 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5108 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5109 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5110 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5111 return TRUE;
5112 }
5113
5114 /* This is a reference to a symbol defined by a dynamic object which
5115 is not a function. */
5116
5117 /* If we are creating a shared library, we must presume that the
5118 only references to the symbol are via the global offset table.
5119 For such cases we need not do anything here; the relocations will
5120 be handled correctly by relocate_section. */
5121 if (info->shared)
5122 return TRUE;
5123
5124 /* We must allocate the symbol in our .dynbss section, which will
5125 become part of the .bss section of the executable. There will be
5126 an entry for this symbol in the .dynsym section. The dynamic
5127 object will contain position independent code, so all references
5128 from the dynamic object to this symbol will go through the global
5129 offset table. The dynamic linker will use the .dynsym entry to
5130 determine the address it must put in the global offset table, so
5131 both the dynamic object and the regular object will refer to the
5132 same memory location for the variable. */
5133
5134 s = bfd_get_section_by_name (dynobj, ".dynbss");
5135 BFD_ASSERT (s != NULL);
5136
5137 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5138 copy the initial value out of the dynamic object and into the
5139 runtime process image. We need to remember the offset into the
5140 .rela.bss section we are going to use. */
5141 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5142 {
5143 asection *srel;
5144
5145 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
5146 BFD_ASSERT (srel != NULL);
5147 srel->size += sizeof (Elf32_External_Rela);
5148 h->needs_copy = 1;
5149 }
5150
5151 /* We need to figure out the alignment required for this symbol. I
5152 have no idea how ELF linkers handle this. */
5153 power_of_two = bfd_log2 (h->size);
5154 if (power_of_two > 3)
5155 power_of_two = 3;
5156
5157 /* Apply the required alignment. */
5158 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5159 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5160 {
5161 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5162 return FALSE;
5163 }
5164
5165 /* Define the symbol as being at this point in the section. */
5166 h->root.u.def.section = s;
5167 h->root.u.def.value = s->size;
5168
5169 /* Increment the section size to make room for the symbol. */
5170 s->size += h->size;
5171
5172 return TRUE;
5173 }
5174
5175 /* The bfin linker needs to keep track of the number of relocs that it
5176 decides to copy in check_relocs for each symbol. This is so that it
5177 can discard PC relative relocs if it doesn't need them when linking
5178 with -Bsymbolic. We store the information in a field extending the
5179 regular ELF linker hash table. */
5180
5181 /* This structure keeps track of the number of PC relative relocs we have
5182 copied for a given symbol. */
5183
5184 struct bfin_pcrel_relocs_copied
5185 {
5186 /* Next section. */
5187 struct bfin_pcrel_relocs_copied *next;
5188 /* A section in dynobj. */
5189 asection *section;
5190 /* Number of relocs copied in this section. */
5191 bfd_size_type count;
5192 };
5193
5194 /* This function is called via elf_link_hash_traverse if we are
5195 creating a shared object. In the -Bsymbolic case it discards the
5196 space allocated to copy PC relative relocs against symbols which
5197 are defined in regular objects. For the normal shared case, it
5198 discards space for pc-relative relocs that have become local due to
5199 symbol visibility changes. We allocated space for them in the
5200 check_relocs routine, but we won't fill them in in the
5201 relocate_section routine.
5202
5203 We also check whether any of the remaining relocations apply
5204 against a readonly section, and set the DF_TEXTREL flag in this
5205 case. */
5206
5207 static bfd_boolean
5208 bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
5209 {
5210 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5211 struct bfin_pcrel_relocs_copied *s;
5212
5213 if (h->root.type == bfd_link_hash_warning)
5214 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5215
5216 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5217 {
5218 if ((info->flags & DF_TEXTREL) == 0)
5219 {
5220 /* Look for relocations against read-only sections. */
5221 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5222 s != NULL; s = s->next)
5223 if ((s->section->flags & SEC_READONLY) != 0)
5224 {
5225 info->flags |= DF_TEXTREL;
5226 break;
5227 }
5228 }
5229
5230 return TRUE;
5231 }
5232
5233 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5234 s != NULL; s = s->next)
5235 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5236
5237 return TRUE;
5238 }
5239
5240 static bfd_boolean
5241 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5242 struct bfd_link_info *info)
5243 {
5244 bfd *dynobj;
5245 asection *s;
5246 bfd_boolean relocs;
5247
5248 dynobj = elf_hash_table (info)->dynobj;
5249 BFD_ASSERT (dynobj != NULL);
5250
5251 if (elf_hash_table (info)->dynamic_sections_created)
5252 {
5253 /* Set the contents of the .interp section to the interpreter. */
5254 if (info->executable)
5255 {
5256 s = bfd_get_section_by_name (dynobj, ".interp");
5257 BFD_ASSERT (s != NULL);
5258 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5259 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5260 }
5261 }
5262 else
5263 {
5264 /* We may have created entries in the .rela.got section.
5265 However, if we are not creating the dynamic sections, we will
5266 not actually use these entries. Reset the size of .rela.got,
5267 which will cause it to get stripped from the output file
5268 below. */
5269 s = bfd_get_section_by_name (dynobj, ".rela.got");
5270 if (s != NULL)
5271 s->size = 0;
5272 }
5273
5274 /* If this is a -Bsymbolic shared link, then we need to discard all
5275 PC relative relocs against symbols defined in a regular object.
5276 For the normal shared case we discard the PC relative relocs
5277 against symbols that have become local due to visibility changes.
5278 We allocated space for them in the check_relocs routine, but we
5279 will not fill them in in the relocate_section routine. */
5280 if (info->shared)
5281 elf_link_hash_traverse (elf_hash_table (info),
5282 bfin_discard_copies, (PTR) info);
5283
5284 /* The check_relocs and adjust_dynamic_symbol entry points have
5285 determined the sizes of the various dynamic sections. Allocate
5286 memory for them. */
5287 relocs = FALSE;
5288 for (s = dynobj->sections; s != NULL; s = s->next)
5289 {
5290 const char *name;
5291 bfd_boolean strip;
5292
5293 if ((s->flags & SEC_LINKER_CREATED) == 0)
5294 continue;
5295
5296 /* It's OK to base decisions on the section name, because none
5297 of the dynobj section names depend upon the input files. */
5298 name = bfd_get_section_name (dynobj, s);
5299
5300 strip = FALSE;
5301
5302 if (strncmp (name, ".rela", 5) == 0)
5303 {
5304 if (s->size == 0)
5305 {
5306 /* If we don't need this section, strip it from the
5307 output file. This is mostly to handle .rela.bss and
5308 .rela.plt. We must create both sections in
5309 create_dynamic_sections, because they must be created
5310 before the linker maps input sections to output
5311 sections. The linker does that before
5312 adjust_dynamic_symbol is called, and it is that
5313 function which decides whether anything needs to go
5314 into these sections. */
5315 strip = TRUE;
5316 }
5317 else
5318 {
5319 relocs = TRUE;
5320
5321 /* We use the reloc_count field as a counter if we need
5322 to copy relocs into the output file. */
5323 s->reloc_count = 0;
5324 }
5325 }
5326 else if (strncmp (name, ".got", 4) != 0)
5327 {
5328 /* It's not one of our sections, so don't allocate space. */
5329 continue;
5330 }
5331
5332 if (strip)
5333 {
5334 s->flags |= SEC_EXCLUDE;
5335 continue;
5336 }
5337
5338 /* Allocate memory for the section contents. */
5339 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5340 Unused entries should be reclaimed before the section's contents
5341 are written out, but at the moment this does not happen. Thus in
5342 order to prevent writing out garbage, we initialise the section's
5343 contents to zero. */
5344 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5345 if (s->contents == NULL && s->size != 0)
5346 return FALSE;
5347 }
5348
5349 if (elf_hash_table (info)->dynamic_sections_created)
5350 {
5351 /* Add some entries to the .dynamic section. We fill in the
5352 values later, in bfin_finish_dynamic_sections, but we
5353 must add the entries now so that we get the correct size for
5354 the .dynamic section. The DT_DEBUG entry is filled in by the
5355 dynamic linker and used by the debugger. */
5356 #define add_dynamic_entry(TAG, VAL) \
5357 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5358
5359 if (!info->shared)
5360 {
5361 if (!add_dynamic_entry (DT_DEBUG, 0))
5362 return FALSE;
5363 }
5364
5365
5366 if (relocs)
5367 {
5368 if (!add_dynamic_entry (DT_RELA, 0)
5369 || !add_dynamic_entry (DT_RELASZ, 0)
5370 || !add_dynamic_entry (DT_RELAENT,
5371 sizeof (Elf32_External_Rela)))
5372 return FALSE;
5373 }
5374
5375 if ((info->flags & DF_TEXTREL) != 0)
5376 {
5377 if (!add_dynamic_entry (DT_TEXTREL, 0))
5378 return FALSE;
5379 }
5380 }
5381 #undef add_dynamic_entry
5382
5383 return TRUE;
5384 }
5385 \f
5386 /* Given a .data section and a .emreloc in-memory section, store
5387 relocation information into the .emreloc section which can be
5388 used at runtime to relocate the section. This is called by the
5389 linker when the --embedded-relocs switch is used. This is called
5390 after the add_symbols entry point has been called for all the
5391 objects, and before the final_link entry point is called. */
5392
5393 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5394 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
5395
5396 bfd_boolean
5397 bfd_bfin_elf32_create_embedded_relocs (
5398 bfd *abfd,
5399 struct bfd_link_info *info,
5400 asection *datasec,
5401 asection *relsec,
5402 char **errmsg)
5403 {
5404 Elf_Internal_Shdr *symtab_hdr;
5405 Elf_Internal_Sym *isymbuf = NULL;
5406 Elf_Internal_Rela *internal_relocs = NULL;
5407 Elf_Internal_Rela *irel, *irelend;
5408 bfd_byte *p;
5409 bfd_size_type amt;
5410
5411 BFD_ASSERT (! info->relocatable);
5412
5413 *errmsg = NULL;
5414
5415 if (datasec->reloc_count == 0)
5416 return TRUE;
5417
5418 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5419
5420 /* Get a copy of the native relocations. */
5421 internal_relocs = (_bfd_elf_link_read_relocs
5422 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
5423 info->keep_memory));
5424 if (internal_relocs == NULL)
5425 goto error_return;
5426
5427 amt = (bfd_size_type) datasec->reloc_count * 12;
5428 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5429 if (relsec->contents == NULL)
5430 goto error_return;
5431
5432 p = relsec->contents;
5433
5434 irelend = internal_relocs + datasec->reloc_count;
5435 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5436 {
5437 asection *targetsec;
5438
5439 /* We are going to write a four byte longword into the runtime
5440 reloc section. The longword will be the address in the data
5441 section which must be relocated. It is followed by the name
5442 of the target section NUL-padded or truncated to 8
5443 characters. */
5444
5445 /* We can only relocate absolute longword relocs at run time. */
5446 if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data)
5447 {
5448 *errmsg = _("unsupported reloc type");
5449 bfd_set_error (bfd_error_bad_value);
5450 goto error_return;
5451 }
5452
5453 /* Get the target section referred to by the reloc. */
5454 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5455 {
5456 /* A local symbol. */
5457 Elf_Internal_Sym *isym;
5458
5459 /* Read this BFD's local symbols if we haven't done so already. */
5460 if (isymbuf == NULL)
5461 {
5462 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5463 if (isymbuf == NULL)
5464 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5465 symtab_hdr->sh_info, 0,
5466 NULL, NULL, NULL);
5467 if (isymbuf == NULL)
5468 goto error_return;
5469 }
5470
5471 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5472 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5473 }
5474 else
5475 {
5476 unsigned long indx;
5477 struct elf_link_hash_entry *h;
5478
5479 /* An external symbol. */
5480 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5481 h = elf_sym_hashes (abfd)[indx];
5482 BFD_ASSERT (h != NULL);
5483 if (h->root.type == bfd_link_hash_defined
5484 || h->root.type == bfd_link_hash_defweak)
5485 targetsec = h->root.u.def.section;
5486 else
5487 targetsec = NULL;
5488 }
5489
5490 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5491 memset (p + 4, 0, 8);
5492 if (targetsec != NULL)
5493 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5494 }
5495
5496 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5497 free (isymbuf);
5498 if (internal_relocs != NULL
5499 && elf_section_data (datasec)->relocs != internal_relocs)
5500 free (internal_relocs);
5501 return TRUE;
5502
5503 error_return:
5504 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5505 free (isymbuf);
5506 if (internal_relocs != NULL
5507 && elf_section_data (datasec)->relocs != internal_relocs)
5508 free (internal_relocs);
5509 return FALSE;
5510 }
5511 \f
5512 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5513 #define TARGET_LITTLE_NAME "elf32-bfin"
5514 #define ELF_ARCH bfd_arch_bfin
5515 #define ELF_MACHINE_CODE EM_BLACKFIN
5516 #define ELF_MAXPAGESIZE 0x1000
5517 #define elf_symbol_leading_char '_'
5518
5519 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5520 #define elf_info_to_howto bfin_info_to_howto
5521 #define elf_info_to_howto_rel 0
5522 #define elf_backend_object_p elf32_bfin_object_p
5523
5524 #define bfd_elf32_bfd_is_local_label_name \
5525 bfin_is_local_label_name
5526 #define bfin_hash_table(p) \
5527 ((struct bfin_link_hash_table *) (p)->hash)
5528
5529
5530
5531 #define elf_backend_create_dynamic_sections \
5532 _bfd_elf_create_dynamic_sections
5533 #define bfd_elf32_bfd_link_hash_table_create \
5534 bfin_link_hash_table_create
5535 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5536
5537 #define elf_backend_check_relocs bfin_check_relocs
5538 #define elf_backend_adjust_dynamic_symbol \
5539 bfin_adjust_dynamic_symbol
5540 #define elf_backend_size_dynamic_sections \
5541 bfin_size_dynamic_sections
5542 #define elf_backend_relocate_section bfin_relocate_section
5543 #define elf_backend_finish_dynamic_symbol \
5544 bfin_finish_dynamic_symbol
5545 #define elf_backend_finish_dynamic_sections \
5546 bfin_finish_dynamic_sections
5547 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5548 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5549 #define bfd_elf32_bfd_merge_private_bfd_data \
5550 elf32_bfin_merge_private_bfd_data
5551 #define bfd_elf32_bfd_set_private_flags \
5552 elf32_bfin_set_private_flags
5553 #define bfd_elf32_bfd_print_private_bfd_data \
5554 elf32_bfin_print_private_bfd_data
5555 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5556 #define elf_backend_can_gc_sections 1
5557 #define elf_backend_can_refcount 1
5558 #define elf_backend_want_got_plt 0
5559 #define elf_backend_plt_readonly 1
5560 #define elf_backend_want_plt_sym 0
5561 #define elf_backend_got_header_size 12
5562 #define elf_backend_rela_normal 1
5563
5564 #include "elf32-target.h"
5565
5566 #undef TARGET_LITTLE_SYM
5567 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5568 #undef TARGET_LITTLE_NAME
5569 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5570 #undef elf32_bed
5571 #define elf32_bed elf32_bfinfdpic_bed
5572
5573 #undef elf_backend_gc_sweep_hook
5574 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5575
5576 #undef elf_backend_got_header_size
5577 #define elf_backend_got_header_size 0
5578
5579 #undef elf_backend_relocate_section
5580 #define elf_backend_relocate_section bfinfdpic_relocate_section
5581 #undef elf_backend_check_relocs
5582 #define elf_backend_check_relocs bfinfdpic_check_relocs
5583
5584 #undef bfd_elf32_bfd_link_hash_table_create
5585 #define bfd_elf32_bfd_link_hash_table_create \
5586 bfinfdpic_elf_link_hash_table_create
5587 #undef elf_backend_always_size_sections
5588 #define elf_backend_always_size_sections \
5589 elf32_bfinfdpic_always_size_sections
5590 #undef elf_backend_modify_segment_map
5591 #define elf_backend_modify_segment_map \
5592 elf32_bfinfdpic_modify_segment_map
5593 #undef bfd_elf32_bfd_copy_private_bfd_data
5594 #define bfd_elf32_bfd_copy_private_bfd_data \
5595 elf32_bfinfdpic_copy_private_bfd_data
5596
5597 #undef elf_backend_create_dynamic_sections
5598 #define elf_backend_create_dynamic_sections \
5599 elf32_bfinfdpic_create_dynamic_sections
5600 #undef elf_backend_adjust_dynamic_symbol
5601 #define elf_backend_adjust_dynamic_symbol \
5602 elf32_bfinfdpic_adjust_dynamic_symbol
5603 #undef elf_backend_size_dynamic_sections
5604 #define elf_backend_size_dynamic_sections \
5605 elf32_bfinfdpic_size_dynamic_sections
5606 #undef elf_backend_finish_dynamic_symbol
5607 #define elf_backend_finish_dynamic_symbol \
5608 elf32_bfinfdpic_finish_dynamic_symbol
5609 #undef elf_backend_finish_dynamic_sections
5610 #define elf_backend_finish_dynamic_sections \
5611 elf32_bfinfdpic_finish_dynamic_sections
5612
5613 #undef elf_backend_can_make_relative_eh_frame
5614 #define elf_backend_can_make_relative_eh_frame \
5615 bfinfdpic_elf_use_relative_eh_frame
5616 #undef elf_backend_can_make_lsda_relative_eh_frame
5617 #define elf_backend_can_make_lsda_relative_eh_frame \
5618 bfinfdpic_elf_use_relative_eh_frame
5619 #undef elf_backend_encode_eh_address
5620 #define elf_backend_encode_eh_address \
5621 bfinfdpic_elf_encode_eh_address
5622
5623 #undef elf_backend_may_use_rel_p
5624 #define elf_backend_may_use_rel_p 1
5625 #undef elf_backend_may_use_rela_p
5626 #define elf_backend_may_use_rela_p 1
5627 /* We use REL for dynamic relocations only. */
5628 #undef elf_backend_default_use_rela_p
5629 #define elf_backend_default_use_rela_p 1
5630
5631 #undef elf_backend_omit_section_dynsym
5632 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5633
5634 #include "elf32-target.h"
GDB Binutils - Deliverables
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