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[binutils.git] / bfd / elf32-bfin.c
blobd5a81dbc60575f6fe9cb3660534120a364167c86
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 ? (long) entry->d.h->root.root.hash
1288 : entry->symndx + (long) 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 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3257 int ptralign;
3258 int offset;
3259
3260 /* This function may be called more than once. */
3261 s = bfd_get_section_by_name (abfd, ".got");
3262 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
3263 return TRUE;
3264
3265 /* Machine specific: although pointers are 32-bits wide, we want the
3266 GOT to be aligned to a 64-bit boundary, such that function
3267 descriptors in it can be accessed with 64-bit loads and
3268 stores. */
3269 ptralign = 3;
3270
3271 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3272 | SEC_LINKER_CREATED);
3273 pltflags = flags;
3274
3275 s = bfd_make_section_with_flags (abfd, ".got", flags);
3276 if (s == NULL
3277 || !bfd_set_section_alignment (abfd, s, ptralign))
3278 return FALSE;
3279
3280 if (bed->want_got_plt)
3281 {
3282 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
3283 if (s == NULL
3284 || !bfd_set_section_alignment (abfd, s, ptralign))
3285 return FALSE;
3286 }
3287
3288 if (bed->want_got_sym)
3289 {
3290 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3291 (or .got.plt) section. We don't do this in the linker script
3292 because we don't want to define the symbol if we are not creating
3293 a global offset table. */
3294 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
3295 elf_hash_table (info)->hgot = h;
3296 if (h == NULL)
3297 return FALSE;
3298
3299 /* Machine-specific: we want the symbol for executables as
3300 well. */
3301 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3302 return FALSE;
3303 }
3304
3305 /* The first bit of the global offset table is the header. */
3306 s->size += bed->got_header_size;
3307
3308 /* This is the machine-specific part. Create and initialize section
3309 data for the got. */
3310 if (IS_FDPIC (abfd))
3311 {
3312 bfinfdpic_got_section (info) = s;
3313 bfinfdpic_relocs_info (info) = htab_try_create (1,
3314 bfinfdpic_relocs_info_hash,
3315 bfinfdpic_relocs_info_eq,
3316 (htab_del) NULL);
3317 if (! bfinfdpic_relocs_info (info))
3318 return FALSE;
3319
3320 s = bfd_make_section_with_flags (abfd, ".rel.got",
3321 (flags | SEC_READONLY));
3322 if (s == NULL
3323 || ! bfd_set_section_alignment (abfd, s, 2))
3324 return FALSE;
3325
3326 bfinfdpic_gotrel_section (info) = s;
3327
3328 /* Machine-specific. */
3329 s = bfd_make_section_with_flags (abfd, ".rofixup",
3330 (flags | SEC_READONLY));
3331 if (s == NULL
3332 || ! bfd_set_section_alignment (abfd, s, 2))
3333 return FALSE;
3334
3335 bfinfdpic_gotfixup_section (info) = s;
3336 offset = -2048;
3337 flags = BSF_GLOBAL;
3338 }
3339 else
3340 {
3341 offset = 2048;
3342 flags = BSF_GLOBAL | BSF_WEAK;
3343 }
3344
3345 return TRUE;
3346 }
3347
3348 /* Make sure the got and plt sections exist, and that our pointers in
3349 the link hash table point to them. */
3350
3351 static bfd_boolean
3352 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3353 {
3354 /* This is mostly copied from
3355 elflink.c:_bfd_elf_create_dynamic_sections(). */
3356 flagword flags, pltflags;
3357 asection *s;
3358 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3359
3360 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3361 .rel[a].bss sections. */
3362
3363 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3364 | SEC_LINKER_CREATED);
3365
3366 pltflags = flags;
3367 pltflags |= SEC_CODE;
3368 if (bed->plt_not_loaded)
3369 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3370 if (bed->plt_readonly)
3371 pltflags |= SEC_READONLY;
3372
3373 s = bfd_make_section (abfd, ".plt");
3374 if (s == NULL
3375 || ! bfd_set_section_flags (abfd, s, pltflags)
3376 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3377 return FALSE;
3378 /* Blackfin-specific: remember it. */
3379 bfinfdpic_plt_section (info) = s;
3380
3381 if (bed->want_plt_sym)
3382 {
3383 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3384 .plt section. */
3385 struct elf_link_hash_entry *h;
3386 struct bfd_link_hash_entry *bh = NULL;
3387
3388 if (! (_bfd_generic_link_add_one_symbol
3389 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3390 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3391 return FALSE;
3392 h = (struct elf_link_hash_entry *) bh;
3393 h->def_regular = 1;
3394 h->type = STT_OBJECT;
3395
3396 if (! info->executable
3397 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3398 return FALSE;
3399 }
3400
3401 /* Blackfin-specific: we want rel relocations for the plt. */
3402 s = bfd_make_section (abfd, ".rel.plt");
3403 if (s == NULL
3404 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3405 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3406 return FALSE;
3407 /* Blackfin-specific: remember it. */
3408 bfinfdpic_pltrel_section (info) = s;
3409
3410 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3411 if (! _bfin_create_got_section (abfd, info))
3412 return FALSE;
3413
3414 /* Blackfin-specific: make sure we created everything we wanted. */
3415 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3416 /* && bfinfdpic_gotfixup_section (info) */
3417 && bfinfdpic_plt_section (info)
3418 && bfinfdpic_pltrel_section (info));
3419
3420 if (bed->want_dynbss)
3421 {
3422 /* The .dynbss section is a place to put symbols which are defined
3423 by dynamic objects, are referenced by regular objects, and are
3424 not functions. We must allocate space for them in the process
3425 image and use a R_*_COPY reloc to tell the dynamic linker to
3426 initialize them at run time. The linker script puts the .dynbss
3427 section into the .bss section of the final image. */
3428 s = bfd_make_section (abfd, ".dynbss");
3429 if (s == NULL
3430 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
3431 return FALSE;
3432
3433 /* The .rel[a].bss section holds copy relocs. This section is not
3434 normally needed. We need to create it here, though, so that the
3435 linker will map it to an output section. We can't just create it
3436 only if we need it, because we will not know whether we need it
3437 until we have seen all the input files, and the first time the
3438 main linker code calls BFD after examining all the input files
3439 (size_dynamic_sections) the input sections have already been
3440 mapped to the output sections. If the section turns out not to
3441 be needed, we can discard it later. We will never need this
3442 section when generating a shared object, since they do not use
3443 copy relocs. */
3444 if (! info->shared)
3445 {
3446 s = bfd_make_section (abfd,
3447 (bed->default_use_rela_p
3448 ? ".rela.bss" : ".rel.bss"));
3449 if (s == NULL
3450 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3451 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3452 return FALSE;
3453 }
3454 }
3455
3456 return TRUE;
3457 }
3458
3459 /* The name of the dynamic interpreter. This is put in the .interp
3460 section. */
3461
3462 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3463
3464 #define DEFAULT_STACK_SIZE 0x20000
3465
3466 /* This structure is used to collect the number of entries present in
3467 each addressable range of the got. */
3468 struct _bfinfdpic_dynamic_got_info
3469 {
3470 /* Several bits of information about the current link. */
3471 struct bfd_link_info *info;
3472 /* Total size needed for GOT entries within the 18- or 32-bit
3473 ranges. */
3474 bfd_vma got17m4, gothilo;
3475 /* Total size needed for function descriptor entries within the 18-
3476 or 32-bit ranges. */
3477 bfd_vma fd17m4, fdhilo;
3478 /* Total size needed function descriptor entries referenced in PLT
3479 entries, that would be profitable to place in offsets close to
3480 the PIC register. */
3481 bfd_vma fdplt;
3482 /* Total size needed by lazy PLT entries. */
3483 bfd_vma lzplt;
3484 /* Number of relocations carried over from input object files. */
3485 unsigned long relocs;
3486 /* Number of fixups introduced by relocations in input object files. */
3487 unsigned long fixups;
3488 };
3489
3490 /* Compute the total GOT size required by each symbol in each range.
3491 Symbols may require up to 4 words in the GOT: an entry pointing to
3492 the symbol, an entry pointing to its function descriptor, and a
3493 private function descriptors taking two words. */
3494
3495 static int
3496 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3497 {
3498 struct bfinfdpic_relocs_info *entry = *entryp;
3499 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3500 unsigned relocs = 0, fixups = 0;
3501
3502 /* Allocate space for a GOT entry pointing to the symbol. */
3503 if (entry->got17m4)
3504 dinfo->got17m4 += 4;
3505 else if (entry->gothilo)
3506 dinfo->gothilo += 4;
3507 else
3508 entry->relocs32--;
3509 entry->relocs32++;
3510
3511 /* Allocate space for a GOT entry pointing to the function
3512 descriptor. */
3513 if (entry->fdgot17m4)
3514 dinfo->got17m4 += 4;
3515 else if (entry->fdgothilo)
3516 dinfo->gothilo += 4;
3517 else
3518 entry->relocsfd--;
3519 entry->relocsfd++;
3520
3521 /* Decide whether we need a PLT entry, a function descriptor in the
3522 GOT, and a lazy PLT entry for this symbol. */
3523 entry->plt = entry->call
3524 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3525 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3526 entry->privfd = entry->plt
3527 || entry->fdgoff17m4 || entry->fdgoffhilo
3528 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3529 && (entry->symndx != -1
3530 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3531 entry->lazyplt = entry->privfd
3532 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3533 && ! (dinfo->info->flags & DF_BIND_NOW)
3534 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3535
3536 /* Allocate space for a function descriptor. */
3537 if (entry->fdgoff17m4)
3538 dinfo->fd17m4 += 8;
3539 else if (entry->privfd && entry->plt)
3540 dinfo->fdplt += 8;
3541 else if (entry->privfd)
3542 dinfo->fdhilo += 8;
3543 else
3544 entry->relocsfdv--;
3545 entry->relocsfdv++;
3546
3547 if (entry->lazyplt)
3548 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3549
3550 if (!dinfo->info->executable || dinfo->info->pie)
3551 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3552 else
3553 {
3554 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3555 {
3556 if (entry->symndx != -1
3557 || entry->d.h->root.type != bfd_link_hash_undefweak)
3558 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3559 }
3560 else
3561 relocs += entry->relocs32 + entry->relocsfdv;
3562
3563 if (entry->symndx != -1
3564 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3565 {
3566 if (entry->symndx != -1
3567 || entry->d.h->root.type != bfd_link_hash_undefweak)
3568 fixups += entry->relocsfd;
3569 }
3570 else
3571 relocs += entry->relocsfd;
3572 }
3573
3574 entry->dynrelocs += relocs;
3575 entry->fixups += fixups;
3576 dinfo->relocs += relocs;
3577 dinfo->fixups += fixups;
3578
3579 return 1;
3580 }
3581
3582 /* This structure is used to assign offsets to got entries, function
3583 descriptors, plt entries and lazy plt entries. */
3584
3585 struct _bfinfdpic_dynamic_got_plt_info
3586 {
3587 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3588 struct _bfinfdpic_dynamic_got_info g;
3589
3590 /* For each addressable range, we record a MAX (positive) and MIN
3591 (negative) value. CUR is used to assign got entries, and it's
3592 incremented from an initial positive value to MAX, then from MIN
3593 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3594 assign function descriptors, and it's decreased from an initial
3595 non-positive value to MIN, then from MAX down to CUR (unless CUR
3596 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3597 to even words. ODD, if non-zero, indicates an odd word to be
3598 used for the next got entry, otherwise CUR is used and
3599 incremented by a pair of words, wrapping around when it reaches
3600 MAX. FDCUR is decremented (and wrapped) before the next function
3601 descriptor is chosen. FDPLT indicates the number of remaining
3602 slots that can be used for function descriptors used only by PLT
3603 entries. */
3604 struct _bfinfdpic_dynamic_got_alloc_data
3605 {
3606 bfd_signed_vma max, cur, odd, fdcur, min;
3607 bfd_vma fdplt;
3608 } got17m4, gothilo;
3609 };
3610
3611 /* Determine the positive and negative ranges to be used by each
3612 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3613 double-word boundary, are the minimum (negative) and maximum
3614 (positive) GOT offsets already used by previous ranges, except for
3615 an ODD entry that may have been left behind. GOT and FD indicate
3616 the size of GOT entries and function descriptors that must be
3617 placed within the range from -WRAP to WRAP. If there's room left,
3618 up to FDPLT bytes should be reserved for additional function
3619 descriptors. */
3620
3621 inline static bfd_signed_vma
3622 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3623 bfd_signed_vma fdcur,
3624 bfd_signed_vma odd,
3625 bfd_signed_vma cur,
3626 bfd_vma got,
3627 bfd_vma fd,
3628 bfd_vma fdplt,
3629 bfd_vma wrap)
3630 {
3631 bfd_signed_vma wrapmin = -wrap;
3632
3633 /* Start at the given initial points. */
3634 gad->fdcur = fdcur;
3635 gad->cur = cur;
3636
3637 /* If we had an incoming odd word and we have any got entries that
3638 are going to use it, consume it, otherwise leave gad->odd at
3639 zero. We might force gad->odd to zero and return the incoming
3640 odd such that it is used by the next range, but then GOT entries
3641 might appear to be out of order and we wouldn't be able to
3642 shorten the GOT by one word if it turns out to end with an
3643 unpaired GOT entry. */
3644 if (odd && got)
3645 {
3646 gad->odd = odd;
3647 got -= 4;
3648 odd = 0;
3649 }
3650 else
3651 gad->odd = 0;
3652
3653 /* If we're left with an unpaired GOT entry, compute its location
3654 such that we can return it. Otherwise, if got doesn't require an
3655 odd number of words here, either odd was already zero in the
3656 block above, or it was set to zero because got was non-zero, or
3657 got was already zero. In the latter case, we want the value of
3658 odd to carry over to the return statement, so we don't want to
3659 reset odd unless the condition below is true. */
3660 if (got & 4)
3661 {
3662 odd = cur + got;
3663 got += 4;
3664 }
3665
3666 /* Compute the tentative boundaries of this range. */
3667 gad->max = cur + got;
3668 gad->min = fdcur - fd;
3669 gad->fdplt = 0;
3670
3671 /* If function descriptors took too much space, wrap some of them
3672 around. */
3673 if (gad->min < wrapmin)
3674 {
3675 gad->max += wrapmin - gad->min;
3676 gad->min = wrapmin;
3677 }
3678 /* If there is space left and we have function descriptors
3679 referenced in PLT entries that could take advantage of shorter
3680 offsets, place them here. */
3681 else if (fdplt && gad->min > wrapmin)
3682 {
3683 bfd_vma fds;
3684 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3685 fds = gad->min - wrapmin;
3686 else
3687 fds = fdplt;
3688
3689 fdplt -= fds;
3690 gad->min -= fds;
3691 gad->fdplt += fds;
3692 }
3693
3694 /* If GOT entries took too much space, wrap some of them around.
3695 This may well cause gad->min to become lower than wrapmin. This
3696 will cause a relocation overflow later on, so we don't have to
3697 report it here . */
3698 if ((bfd_vma) gad->max > wrap)
3699 {
3700 gad->min -= gad->max - wrap;
3701 gad->max = wrap;
3702 }
3703 /* If there is more space left, try to place some more function
3704 descriptors for PLT entries. */
3705 else if (fdplt && (bfd_vma) gad->max < wrap)
3706 {
3707 bfd_vma fds;
3708 if ((bfd_vma) (wrap - gad->max) < fdplt)
3709 fds = wrap - gad->max;
3710 else
3711 fds = fdplt;
3712
3713 fdplt -= fds;
3714 gad->max += fds;
3715 gad->fdplt += fds;
3716 }
3717
3718 /* If odd was initially computed as an offset past the wrap point,
3719 wrap it around. */
3720 if (odd > gad->max)
3721 odd = gad->min + odd - gad->max;
3722
3723 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3724 before returning, so do it here too. This guarantees that,
3725 should cur and fdcur meet at the wrap point, they'll both be
3726 equal to min. */
3727 if (gad->cur == gad->max)
3728 gad->cur = gad->min;
3729
3730 return odd;
3731 }
3732
3733 /* Compute the location of the next GOT entry, given the allocation
3734 data for a range. */
3735
3736 inline static bfd_signed_vma
3737 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3738 {
3739 bfd_signed_vma ret;
3740
3741 if (gad->odd)
3742 {
3743 /* If there was an odd word left behind, use it. */
3744 ret = gad->odd;
3745 gad->odd = 0;
3746 }
3747 else
3748 {
3749 /* Otherwise, use the word pointed to by cur, reserve the next
3750 as an odd word, and skip to the next pair of words, possibly
3751 wrapping around. */
3752 ret = gad->cur;
3753 gad->odd = gad->cur + 4;
3754 gad->cur += 8;
3755 if (gad->cur == gad->max)
3756 gad->cur = gad->min;
3757 }
3758
3759 return ret;
3760 }
3761
3762 /* Compute the location of the next function descriptor entry in the
3763 GOT, given the allocation data for a range. */
3764
3765 inline static bfd_signed_vma
3766 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3767 {
3768 /* If we're at the bottom, wrap around, and only then allocate the
3769 next pair of words. */
3770 if (gad->fdcur == gad->min)
3771 gad->fdcur = gad->max;
3772 return gad->fdcur -= 8;
3773 }
3774
3775 /* Assign GOT offsets for every GOT entry and function descriptor.
3776 Doing everything in a single pass is tricky. */
3777
3778 static int
3779 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3780 {
3781 struct bfinfdpic_relocs_info *entry = *entryp;
3782 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3783
3784 if (entry->got17m4)
3785 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3786 else if (entry->gothilo)
3787 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3788
3789 if (entry->fdgot17m4)
3790 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3791 else if (entry->fdgothilo)
3792 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3793
3794 if (entry->fdgoff17m4)
3795 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3796 else if (entry->plt && dinfo->got17m4.fdplt)
3797 {
3798 dinfo->got17m4.fdplt -= 8;
3799 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3800 }
3801 else if (entry->plt)
3802 {
3803 dinfo->gothilo.fdplt -= 8;
3804 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3805 }
3806 else if (entry->privfd)
3807 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3808
3809 return 1;
3810 }
3811
3812 /* Assign GOT offsets to private function descriptors used by PLT
3813 entries (or referenced by 32-bit offsets), as well as PLT entries
3814 and lazy PLT entries. */
3815
3816 static int
3817 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3818 {
3819 struct bfinfdpic_relocs_info *entry = *entryp;
3820 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3821
3822 /* If this symbol requires a local function descriptor, allocate
3823 one. */
3824 if (entry->privfd && entry->fd_entry == 0)
3825 {
3826 if (dinfo->got17m4.fdplt)
3827 {
3828 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3829 dinfo->got17m4.fdplt -= 8;
3830 }
3831 else
3832 {
3833 BFD_ASSERT (dinfo->gothilo.fdplt);
3834 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3835 dinfo->gothilo.fdplt -= 8;
3836 }
3837 }
3838
3839 if (entry->plt)
3840 {
3841 int size;
3842
3843 /* We use the section's raw size to mark the location of the
3844 next PLT entry. */
3845 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3846
3847 /* Figure out the length of this PLT entry based on the
3848 addressing mode we need to reach the function descriptor. */
3849 BFD_ASSERT (entry->fd_entry);
3850 if (entry->fd_entry >= -(1 << (18 - 1))
3851 && entry->fd_entry + 4 < (1 << (18 - 1)))
3852 size = 10;
3853 else
3854 size = 16;
3855
3856 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3857 }
3858
3859 if (entry->lazyplt)
3860 {
3861 entry->lzplt_entry = dinfo->g.lzplt;
3862 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3863 /* If this entry is the one that gets the resolver stub, account
3864 for the additional instruction. */
3865 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3866 == BFINFDPIC_LZPLT_RESOLV_LOC)
3867 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3868 }
3869
3870 return 1;
3871 }
3872
3873 /* Follow indirect and warning hash entries so that each got entry
3874 points to the final symbol definition. P must point to a pointer
3875 to the hash table we're traversing. Since this traversal may
3876 modify the hash table, we set this pointer to NULL to indicate
3877 we've made a potentially-destructive change to the hash table, so
3878 the traversal must be restarted. */
3879 static int
3880 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
3881 {
3882 struct bfinfdpic_relocs_info *entry = *entryp;
3883 htab_t *htab = p;
3884
3885 if (entry->symndx == -1)
3886 {
3887 struct elf_link_hash_entry *h = entry->d.h;
3888 struct bfinfdpic_relocs_info *oentry;
3889
3890 while (h->root.type == bfd_link_hash_indirect
3891 || h->root.type == bfd_link_hash_warning)
3892 h = (struct elf_link_hash_entry *)h->root.u.i.link;
3893
3894 if (entry->d.h == h)
3895 return 1;
3896
3897 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
3898 NO_INSERT);
3899
3900 if (oentry)
3901 {
3902 /* Merge the two entries. */
3903 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
3904 htab_clear_slot (*htab, entryp);
3905 return 1;
3906 }
3907
3908 entry->d.h = h;
3909
3910 /* If we can't find this entry with the new bfd hash, re-insert
3911 it, and get the traversal restarted. */
3912 if (! htab_find (*htab, entry))
3913 {
3914 htab_clear_slot (*htab, entryp);
3915 entryp = htab_find_slot (*htab, entry, INSERT);
3916 if (! *entryp)
3917 *entryp = entry;
3918 /* Abort the traversal, since the whole table may have
3919 moved, and leave it up to the parent to restart the
3920 process. */
3921 *(htab_t *)p = NULL;
3922 return 0;
3923 }
3924 }
3925
3926 return 1;
3927 }
3928
3929 /* Set the sizes of the dynamic sections. */
3930
3931 static bfd_boolean
3932 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
3933 struct bfd_link_info *info)
3934 {
3935 bfd *dynobj;
3936 asection *s;
3937 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
3938 bfd_signed_vma odd;
3939 bfd_vma limit;
3940
3941 dynobj = elf_hash_table (info)->dynobj;
3942 BFD_ASSERT (dynobj != NULL);
3943
3944 if (elf_hash_table (info)->dynamic_sections_created)
3945 {
3946 /* Set the contents of the .interp section to the interpreter. */
3947 if (info->executable)
3948 {
3949 s = bfd_get_section_by_name (dynobj, ".interp");
3950 BFD_ASSERT (s != NULL);
3951 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3952 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
3953 }
3954 }
3955
3956 memset (&gpinfo, 0, sizeof (gpinfo));
3957 gpinfo.g.info = info;
3958
3959 for (;;)
3960 {
3961 htab_t relocs = bfinfdpic_relocs_info (info);
3962
3963 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
3964
3965 if (relocs == bfinfdpic_relocs_info (info))
3966 break;
3967 }
3968
3969 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
3970 &gpinfo.g);
3971
3972 odd = 12;
3973 /* Compute the total size taken by entries in the 18-bit range,
3974 to tell how many PLT function descriptors we can bring into it
3975 without causing it to overflow. */
3976 limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4;
3977 if (limit < (bfd_vma)1 << 18)
3978 limit = ((bfd_vma)1 << 18) - limit;
3979 else
3980 limit = 0;
3981 if (gpinfo.g.fdplt < limit)
3982 limit = gpinfo.g.fdplt;
3983
3984 /* Determine the ranges of GOT offsets that we can use for each
3985 range of addressing modes. */
3986 odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4,
3987 0,
3988 odd,
3989 16,
3990 gpinfo.g.got17m4,
3991 gpinfo.g.fd17m4,
3992 limit,
3993 (bfd_vma)1 << (18-1));
3994 odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo,
3995 gpinfo.got17m4.min,
3996 odd,
3997 gpinfo.got17m4.max,
3998 gpinfo.g.gothilo,
3999 gpinfo.g.fdhilo,
4000 gpinfo.g.fdplt - gpinfo.got17m4.fdplt,
4001 (bfd_vma)1 << (32-1));
4002
4003 /* Now assign (most) GOT offsets. */
4004 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4005 &gpinfo);
4006
4007 bfinfdpic_got_section (info)->size = gpinfo.gothilo.max
4008 - gpinfo.gothilo.min
4009 /* If an odd word is the last word of the GOT, we don't need this
4010 word to be part of the GOT. */
4011 - (odd + 4 == gpinfo.gothilo.max ? 4 : 0);
4012 if (bfinfdpic_got_section (info)->size == 0)
4013 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4014 else if (bfinfdpic_got_section (info)->size == 12
4015 && ! elf_hash_table (info)->dynamic_sections_created)
4016 {
4017 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4018 bfinfdpic_got_section (info)->size = 0;
4019 }
4020 else
4021 {
4022 bfinfdpic_got_section (info)->contents =
4023 (bfd_byte *) bfd_zalloc (dynobj,
4024 bfinfdpic_got_section (info)->size);
4025 if (bfinfdpic_got_section (info)->contents == NULL)
4026 return FALSE;
4027 }
4028
4029 if (elf_hash_table (info)->dynamic_sections_created)
4030 /* Subtract the number of lzplt entries, since those will generate
4031 relocations in the pltrel section. */
4032 bfinfdpic_gotrel_section (info)->size =
4033 (gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE)
4034 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4035 else
4036 BFD_ASSERT (gpinfo.g.relocs == 0);
4037 if (bfinfdpic_gotrel_section (info)->size == 0)
4038 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4039 else
4040 {
4041 bfinfdpic_gotrel_section (info)->contents =
4042 (bfd_byte *) bfd_zalloc (dynobj,
4043 bfinfdpic_gotrel_section (info)->size);
4044 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4045 return FALSE;
4046 }
4047
4048 bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4;
4049 if (bfinfdpic_gotfixup_section (info)->size == 0)
4050 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4051 else
4052 {
4053 bfinfdpic_gotfixup_section (info)->contents =
4054 (bfd_byte *) bfd_zalloc (dynobj,
4055 bfinfdpic_gotfixup_section (info)->size);
4056 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4057 return FALSE;
4058 }
4059
4060 if (elf_hash_table (info)->dynamic_sections_created)
4061 {
4062 bfinfdpic_pltrel_section (info)->size =
4063 gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4064 if (bfinfdpic_pltrel_section (info)->size == 0)
4065 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4066 else
4067 {
4068 bfinfdpic_pltrel_section (info)->contents =
4069 (bfd_byte *) bfd_zalloc (dynobj,
4070 bfinfdpic_pltrel_section (info)->size);
4071 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4072 return FALSE;
4073 }
4074 }
4075
4076 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4077 such that there's room for the additional instruction needed to
4078 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4079 account for them, our block size is 4 bytes smaller than the real
4080 block size. */
4081 if (elf_hash_table (info)->dynamic_sections_created)
4082 {
4083 bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt
4084 + ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4085 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4086 }
4087
4088 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4089 actually assign lazy PLT entries addresses. */
4090 gpinfo.g.lzplt = 0;
4091
4092 /* Save information that we're going to need to generate GOT and PLT
4093 entries. */
4094 bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min;
4095
4096 if (get_elf_backend_data (output_bfd)->want_got_sym)
4097 elf_hash_table (info)->hgot->root.u.def.value
4098 += bfinfdpic_got_initial_offset (info);
4099
4100 if (elf_hash_table (info)->dynamic_sections_created)
4101 bfinfdpic_plt_initial_offset (info) =
4102 bfinfdpic_plt_section (info)->size;
4103
4104 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4105 &gpinfo);
4106
4107 /* Allocate the PLT section contents only after
4108 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4109 non-lazy PLT entries. */
4110 if (elf_hash_table (info)->dynamic_sections_created)
4111 {
4112 if (bfinfdpic_plt_section (info)->size == 0)
4113 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4114 else
4115 {
4116 bfinfdpic_plt_section (info)->contents =
4117 (bfd_byte *) bfd_zalloc (dynobj,
4118 bfinfdpic_plt_section (info)->size);
4119 if (bfinfdpic_plt_section (info)->contents == NULL)
4120 return FALSE;
4121 }
4122 }
4123
4124 if (elf_hash_table (info)->dynamic_sections_created)
4125 {
4126 if (bfinfdpic_got_section (info)->size)
4127 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4128 return FALSE;
4129
4130 if (bfinfdpic_pltrel_section (info)->size)
4131 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4132 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4133 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4134 return FALSE;
4135
4136 if (bfinfdpic_gotrel_section (info)->size)
4137 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4138 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4139 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4140 sizeof (Elf32_External_Rel)))
4141 return FALSE;
4142 }
4143
4144 return TRUE;
4145 }
4146
4147 static bfd_boolean
4148 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4149 struct bfd_link_info *info)
4150 {
4151 if (!info->relocatable)
4152 {
4153 struct elf_link_hash_entry *h;
4154 asection *sec;
4155
4156 /* Force a PT_GNU_STACK segment to be created. */
4157 if (! elf_tdata (output_bfd)->stack_flags)
4158 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
4159
4160 /* Define __stacksize if it's not defined yet. */
4161 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4162 FALSE, FALSE, FALSE);
4163 if (! h || h->root.type != bfd_link_hash_defined
4164 || h->type != STT_OBJECT
4165 || !h->def_regular)
4166 {
4167 struct bfd_link_hash_entry *bh = NULL;
4168
4169 if (!(_bfd_generic_link_add_one_symbol
4170 (info, output_bfd, "__stacksize",
4171 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
4172 (const char *) NULL, FALSE,
4173 get_elf_backend_data (output_bfd)->collect, &bh)))
4174 return FALSE;
4175
4176 h = (struct elf_link_hash_entry *) bh;
4177 h->def_regular = 1;
4178 h->type = STT_OBJECT;
4179 }
4180
4181 /* Create a stack section, and set its alignment. */
4182 sec = bfd_make_section (output_bfd, ".stack");
4183
4184 if (sec == NULL
4185 || ! bfd_set_section_alignment (output_bfd, sec, 3))
4186 return FALSE;
4187 }
4188
4189 return TRUE;
4190 }
4191
4192 static bfd_boolean
4193 elf32_bfinfdpic_modify_segment_map (bfd *output_bfd,
4194 struct bfd_link_info *info)
4195 {
4196 struct elf_segment_map *m;
4197
4198 /* objcopy and strip preserve what's already there using
4199 elf32_bfinfdpic_copy_private_bfd_data (). */
4200 if (! info)
4201 return TRUE;
4202
4203 for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
4204 if (m->p_type == PT_GNU_STACK)
4205 break;
4206
4207 if (m)
4208 {
4209 asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
4210 struct elf_link_hash_entry *h;
4211
4212 if (sec)
4213 {
4214 /* Obtain the pointer to the __stacksize symbol. */
4215 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4216 FALSE, FALSE, FALSE);
4217 while (h->root.type == bfd_link_hash_indirect
4218 || h->root.type == bfd_link_hash_warning)
4219 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4220 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4221
4222 /* Set the section size from the symbol value. We
4223 intentionally ignore the symbol section. */
4224 if (h->root.type == bfd_link_hash_defined)
4225 sec->size = h->root.u.def.value;
4226 else
4227 sec->size = DEFAULT_STACK_SIZE;
4228
4229 /* Add the stack section to the PT_GNU_STACK segment,
4230 such that its size and alignment requirements make it
4231 to the segment. */
4232 m->sections[m->count] = sec;
4233 m->count++;
4234 }
4235 }
4236
4237 return TRUE;
4238 }
4239
4240 static bfd_boolean
4241 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4242 struct bfd_link_info *info)
4243 {
4244 bfd *dynobj;
4245 asection *sdyn;
4246
4247 dynobj = elf_hash_table (info)->dynobj;
4248
4249 if (bfinfdpic_got_section (info))
4250 {
4251 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4252 == (bfinfdpic_gotrel_section (info)->reloc_count
4253 * sizeof (Elf32_External_Rel)));
4254
4255 if (bfinfdpic_gotfixup_section (info))
4256 {
4257 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4258 bfd_vma got_value = hgot->root.u.def.value
4259 + hgot->root.u.def.section->output_section->vma
4260 + hgot->root.u.def.section->output_offset;
4261
4262 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4263 got_value, 0);
4264
4265 if (bfinfdpic_gotfixup_section (info)->size
4266 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4267 {
4268 (*_bfd_error_handler)
4269 ("LINKER BUG: .rofixup section size mismatch");
4270 return FALSE;
4271 }
4272 }
4273 }
4274 if (elf_hash_table (info)->dynamic_sections_created)
4275 {
4276 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4277 == (bfinfdpic_pltrel_section (info)->reloc_count
4278 * sizeof (Elf32_External_Rel)));
4279 }
4280
4281 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4282
4283 if (elf_hash_table (info)->dynamic_sections_created)
4284 {
4285 Elf32_External_Dyn * dyncon;
4286 Elf32_External_Dyn * dynconend;
4287
4288 BFD_ASSERT (sdyn != NULL);
4289
4290 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4291 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4292
4293 for (; dyncon < dynconend; dyncon++)
4294 {
4295 Elf_Internal_Dyn dyn;
4296
4297 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4298
4299 switch (dyn.d_tag)
4300 {
4301 default:
4302 break;
4303
4304 case DT_PLTGOT:
4305 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4306 + bfinfdpic_got_section (info)->output_offset
4307 + bfinfdpic_got_initial_offset (info);
4308 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4309 break;
4310
4311 case DT_JMPREL:
4312 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4313 ->output_section->vma
4314 + bfinfdpic_pltrel_section (info)->output_offset;
4315 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4316 break;
4317
4318 case DT_PLTRELSZ:
4319 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4320 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4321 break;
4322 }
4323 }
4324 }
4325
4326 return TRUE;
4327 }
4328
4329 /* Adjust a symbol defined by a dynamic object and referenced by a
4330 regular object. */
4331
4332 static bfd_boolean
4333 elf32_bfinfdpic_adjust_dynamic_symbol
4334 (struct bfd_link_info *info ATTRIBUTE_UNUSED,
4335 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
4336 {
4337 bfd * dynobj;
4338
4339 dynobj = elf_hash_table (info)->dynobj;
4340
4341 /* Make sure we know what is going on here. */
4342 BFD_ASSERT (dynobj != NULL
4343 && (h->u.weakdef != NULL
4344 || (h->def_dynamic
4345 && h->ref_regular
4346 && !h->def_regular)));
4347
4348 /* If this is a weak symbol, and there is a real definition, the
4349 processor independent code will have arranged for us to see the
4350 real definition first, and we can just use the same value. */
4351 if (h->u.weakdef != NULL)
4352 {
4353 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4354 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4355 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4356 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4357 }
4358
4359 return TRUE;
4360 }
4361
4362 /* Perform any actions needed for dynamic symbols. */
4363
4364 static bfd_boolean
4365 elf32_bfinfdpic_finish_dynamic_symbol
4366 (bfd *output_bfd ATTRIBUTE_UNUSED,
4367 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4368 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4369 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4370 {
4371 return TRUE;
4372 }
4373
4374 /* Decide whether to attempt to turn absptr or lsda encodings in
4375 shared libraries into pcrel within the given input section. */
4376
4377 static bfd_boolean
4378 bfinfdpic_elf_use_relative_eh_frame
4379 (bfd *input_bfd ATTRIBUTE_UNUSED,
4380 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4381 asection *eh_frame_section ATTRIBUTE_UNUSED)
4382 {
4383 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4384 return FALSE;
4385 }
4386
4387 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4388
4389 static bfd_byte
4390 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4391 struct bfd_link_info *info,
4392 asection *osec, bfd_vma offset,
4393 asection *loc_sec, bfd_vma loc_offset,
4394 bfd_vma *encoded)
4395 {
4396 struct elf_link_hash_entry *h;
4397
4398 h = elf_hash_table (info)->hgot;
4399 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4400
4401 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4402 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4403 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4404 loc_sec, loc_offset, encoded);
4405
4406 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4407 == (_bfinfdpic_osec_to_segment
4408 (abfd, h->root.u.def.section->output_section)));
4409
4410 *encoded = osec->vma + offset
4411 - (h->root.u.def.value
4412 + h->root.u.def.section->output_section->vma
4413 + h->root.u.def.section->output_offset);
4414
4415 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4416 }
4417
4418
4419
4420 /* Look through the relocs for a section during the first phase.
4421
4422 Besides handling virtual table relocs for gc, we have to deal with
4423 all sorts of PIC-related relocations. We describe below the
4424 general plan on how to handle such relocations, even though we only
4425 collect information at this point, storing them in hash tables for
4426 perusal of later passes.
4427
4428 32 relocations are propagated to the linker output when creating
4429 position-independent output. LO16 and HI16 relocations are not
4430 supposed to be encountered in this case.
4431
4432 LABEL16 should always be resolvable by the linker, since it's only
4433 used by branches.
4434
4435 LABEL24, on the other hand, is used by calls. If it turns out that
4436 the target of a call is a dynamic symbol, a PLT entry must be
4437 created for it, which triggers the creation of a private function
4438 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4439
4440 GPREL relocations require the referenced symbol to be in the same
4441 segment as _gp, but this can only be checked later.
4442
4443 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4444 exist. LABEL24 might as well, since it may require a PLT entry,
4445 that will require a got.
4446
4447 Non-FUNCDESC GOT relocations require a GOT entry to be created
4448 regardless of whether the symbol is dynamic. However, since a
4449 global symbol that turns out to not be exported may have the same
4450 address of a non-dynamic symbol, we don't assign GOT entries at
4451 this point, such that we can share them in this case. A relocation
4452 for the GOT entry always has to be created, be it to offset a
4453 private symbol by the section load address, be it to get the symbol
4454 resolved dynamically.
4455
4456 FUNCDESC GOT relocations require a GOT entry to be created, and
4457 handled as if a FUNCDESC relocation was applied to the GOT entry in
4458 an object file.
4459
4460 FUNCDESC relocations referencing a symbol that turns out to NOT be
4461 dynamic cause a private function descriptor to be created. The
4462 FUNCDESC relocation then decays to a 32 relocation that points at
4463 the private descriptor. If the symbol is dynamic, the FUNCDESC
4464 relocation is propagated to the linker output, such that the
4465 dynamic linker creates the canonical descriptor, pointing to the
4466 dynamically-resolved definition of the function.
4467
4468 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4469 symbols that are assigned to the same segment as the GOT, but we
4470 can only check this later, after we know the complete set of
4471 symbols defined and/or exported.
4472
4473 FUNCDESC GOTOFF relocations require a function descriptor to be
4474 created and, unless lazy binding is disabled or the symbol is not
4475 dynamic, a lazy PLT entry. Since we can't tell at this point
4476 whether a symbol is going to be dynamic, we have to decide later
4477 whether to create a lazy PLT entry or bind the descriptor directly
4478 to the private function.
4479
4480 FUNCDESC_VALUE relocations are not supposed to be present in object
4481 files, but they may very well be simply propagated to the linker
4482 output, since they have no side effect.
4483
4484
4485 A function descriptor always requires a FUNCDESC_VALUE relocation.
4486 Whether it's in .plt.rel or not depends on whether lazy binding is
4487 enabled and on whether the referenced symbol is dynamic.
4488
4489 The existence of a lazy PLT requires the resolverStub lazy PLT
4490 entry to be present.
4491
4492
4493 As for assignment of GOT, PLT and lazy PLT entries, and private
4494 descriptors, we might do them all sequentially, but we can do
4495 better than that. For example, we can place GOT entries and
4496 private function descriptors referenced using 12-bit operands
4497 closer to the PIC register value, such that these relocations don't
4498 overflow. Those that are only referenced with LO16 relocations
4499 could come next, but we may as well place PLT-required function
4500 descriptors in the 12-bit range to make them shorter. Symbols
4501 referenced with LO16/HI16 may come next, but we may place
4502 additional function descriptors in the 16-bit range if we can
4503 reliably tell that we've already placed entries that are ever
4504 referenced with only LO16. PLT entries are therefore generated as
4505 small as possible, while not introducing relocation overflows in
4506 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4507 generated before or after PLT entries, but not intermingled with
4508 them, such that we can have more lazy PLT entries in range for a
4509 branch to the resolverStub. The resolverStub should be emitted at
4510 the most distant location from the first lazy PLT entry such that
4511 it's still in range for a branch, or closer, if there isn't a need
4512 for so many lazy PLT entries. Additional lazy PLT entries may be
4513 emitted after the resolverStub, as long as branches are still in
4514 range. If the branch goes out of range, longer lazy PLT entries
4515 are emitted.
4516
4517 We could further optimize PLT and lazy PLT entries by giving them
4518 priority in assignment to closer-to-gr17 locations depending on the
4519 number of occurrences of references to them (assuming a function
4520 that's called more often is more important for performance, so its
4521 PLT entry should be faster), or taking hints from the compiler.
4522 Given infinite time and money... :-) */
4523
4524 static bfd_boolean
4525 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4526 asection *sec, const Elf_Internal_Rela *relocs)
4527 {
4528 Elf_Internal_Shdr *symtab_hdr;
4529 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4530 const Elf_Internal_Rela *rel;
4531 const Elf_Internal_Rela *rel_end;
4532 bfd *dynobj;
4533 struct bfinfdpic_relocs_info *picrel;
4534
4535 if (info->relocatable)
4536 return TRUE;
4537
4538 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4539 sym_hashes = elf_sym_hashes (abfd);
4540 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4541 if (!elf_bad_symtab (abfd))
4542 sym_hashes_end -= symtab_hdr->sh_info;
4543
4544 dynobj = elf_hash_table (info)->dynobj;
4545 rel_end = relocs + sec->reloc_count;
4546 for (rel = relocs; rel < rel_end; rel++)
4547 {
4548 struct elf_link_hash_entry *h;
4549 unsigned long r_symndx;
4550
4551 r_symndx = ELF32_R_SYM (rel->r_info);
4552 if (r_symndx < symtab_hdr->sh_info)
4553 h = NULL;
4554 else
4555 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4556
4557 switch (ELF32_R_TYPE (rel->r_info))
4558 {
4559 case R_BFIN_GOT17M4:
4560 case R_BFIN_GOTHI:
4561 case R_BFIN_GOTLO:
4562 case R_BFIN_FUNCDESC_GOT17M4:
4563 case R_BFIN_FUNCDESC_GOTHI:
4564 case R_BFIN_FUNCDESC_GOTLO:
4565 case R_BFIN_GOTOFF17M4:
4566 case R_BFIN_GOTOFFHI:
4567 case R_BFIN_GOTOFFLO:
4568 case R_BFIN_FUNCDESC_GOTOFF17M4:
4569 case R_BFIN_FUNCDESC_GOTOFFHI:
4570 case R_BFIN_FUNCDESC_GOTOFFLO:
4571 case R_BFIN_FUNCDESC:
4572 case R_BFIN_FUNCDESC_VALUE:
4573 if (! IS_FDPIC (abfd))
4574 goto bad_reloc;
4575 /* Fall through. */
4576 case R_pcrel24:
4577 case R_pcrel24_jump_l:
4578 case R_byte4_data:
4579 if (IS_FDPIC (abfd) && ! dynobj)
4580 {
4581 elf_hash_table (info)->dynobj = dynobj = abfd;
4582 if (! _bfin_create_got_section (abfd, info))
4583 return FALSE;
4584 }
4585 if (! IS_FDPIC (abfd))
4586 {
4587 picrel = NULL;
4588 break;
4589 }
4590 if (h != NULL)
4591 {
4592 if (h->dynindx == -1)
4593 switch (ELF_ST_VISIBILITY (h->other))
4594 {
4595 case STV_INTERNAL:
4596 case STV_HIDDEN:
4597 break;
4598 default:
4599 bfd_elf_link_record_dynamic_symbol (info, h);
4600 break;
4601 }
4602 picrel
4603 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4604 abfd, h,
4605 rel->r_addend, INSERT);
4606 }
4607 else
4608 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4609 (info), abfd, r_symndx,
4610 rel->r_addend, INSERT);
4611 if (! picrel)
4612 return FALSE;
4613 break;
4614
4615 default:
4616 picrel = NULL;
4617 break;
4618 }
4619
4620 switch (ELF32_R_TYPE (rel->r_info))
4621 {
4622 case R_pcrel24:
4623 case R_pcrel24_jump_l:
4624 if (IS_FDPIC (abfd))
4625 picrel->call = 1;
4626 break;
4627
4628 case R_BFIN_FUNCDESC_VALUE:
4629 picrel->relocsfdv++;
4630 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4631 picrel->relocs32--;
4632 /* Fall through. */
4633
4634 case R_byte4_data:
4635 if (! IS_FDPIC (abfd))
4636 break;
4637
4638 picrel->sym = 1;
4639 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4640 picrel->relocs32++;
4641 break;
4642
4643 case R_BFIN_GOT17M4:
4644 picrel->got17m4 = 1;
4645 break;
4646
4647 case R_BFIN_GOTHI:
4648 case R_BFIN_GOTLO:
4649 picrel->gothilo = 1;
4650 break;
4651
4652 case R_BFIN_FUNCDESC_GOT17M4:
4653 picrel->fdgot17m4 = 1;
4654 break;
4655
4656 case R_BFIN_FUNCDESC_GOTHI:
4657 case R_BFIN_FUNCDESC_GOTLO:
4658 picrel->fdgothilo = 1;
4659 break;
4660
4661 case R_BFIN_GOTOFF17M4:
4662 case R_BFIN_GOTOFFHI:
4663 case R_BFIN_GOTOFFLO:
4664 picrel->gotoff = 1;
4665 break;
4666
4667 case R_BFIN_FUNCDESC_GOTOFF17M4:
4668 picrel->fdgoff17m4 = 1;
4669 break;
4670
4671 case R_BFIN_FUNCDESC_GOTOFFHI:
4672 case R_BFIN_FUNCDESC_GOTOFFLO:
4673 picrel->fdgoffhilo = 1;
4674 break;
4675
4676 case R_BFIN_FUNCDESC:
4677 picrel->fd = 1;
4678 picrel->relocsfd++;
4679 break;
4680
4681 /* This relocation describes the C++ object vtable hierarchy.
4682 Reconstruct it for later use during GC. */
4683 case R_BFIN_GNU_VTINHERIT:
4684 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4685 return FALSE;
4686 break;
4687
4688 /* This relocation describes which C++ vtable entries are actually
4689 used. Record for later use during GC. */
4690 case R_BFIN_GNU_VTENTRY:
4691 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4692 return FALSE;
4693 break;
4694
4695 case R_huimm16:
4696 case R_luimm16:
4697 case R_pcrel12_jump_s:
4698 case R_pcrel10:
4699 break;
4700
4701 default:
4702 bad_reloc:
4703 (*_bfd_error_handler)
4704 (_("%B: unsupported relocation type %i"),
4705 abfd, ELF32_R_TYPE (rel->r_info));
4706 return FALSE;
4707 }
4708 }
4709
4710 return TRUE;
4711 }
4712
4713 /* Set the right machine number for a Blackfin ELF file. */
4714
4715 static bfd_boolean
4716 elf32_bfin_object_p (bfd *abfd)
4717 {
4718 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4719 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4720 == (IS_FDPIC (abfd)));
4721 }
4722
4723 static bfd_boolean
4724 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4725 {
4726 elf_elfheader (abfd)->e_flags = flags;
4727 elf_flags_init (abfd) = TRUE;
4728 return TRUE;
4729 }
4730
4731 /* Copy backend specific data from one object module to another. */
4732
4733 static bfd_boolean
4734 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4735 {
4736 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4737 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4738 return TRUE;
4739
4740 BFD_ASSERT (!elf_flags_init (obfd)
4741 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
4742
4743 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
4744 elf_flags_init (obfd) = TRUE;
4745 return TRUE;
4746 }
4747
4748 static bfd_boolean
4749 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4750 {
4751 unsigned i;
4752
4753 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4754 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4755 return TRUE;
4756
4757 if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
4758 return FALSE;
4759
4760 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
4761 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
4762 return TRUE;
4763
4764 /* Copy the stack size. */
4765 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
4766 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
4767 {
4768 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
4769
4770 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
4771 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
4772 {
4773 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
4774
4775 /* Rewrite the phdrs, since we're only called after they
4776 were first written. */
4777 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
4778 ->s->sizeof_ehdr, SEEK_SET) != 0
4779 || get_elf_backend_data (obfd)->s
4780 ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
4781 elf_elfheader (obfd)->e_phnum) != 0)
4782 return FALSE;
4783 break;
4784 }
4785
4786 break;
4787 }
4788
4789 return TRUE;
4790 }
4791
4792
4793 /* Display the flags field. */
4794 static bfd_boolean
4795 elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
4796 {
4797 FILE *file = (FILE *) ptr;
4798 flagword flags;
4799
4800 BFD_ASSERT (abfd != NULL && ptr != NULL);
4801
4802 /* Print normal ELF private data. */
4803 _bfd_elf_print_private_bfd_data (abfd, ptr);
4804
4805 flags = elf_elfheader (abfd)->e_flags;
4806
4807 /* xgettext:c-format */
4808 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4809
4810 if (flags & EF_BFIN_PIC)
4811 fprintf (file, " -fpic");
4812
4813 if (flags & EF_BFIN_FDPIC)
4814 fprintf (file, " -mfdpic");
4815
4816 fputc ('\n', file);
4817
4818 return TRUE;
4819 }
4820
4821 /* Merge backend specific data from an object file to the output
4822 object file when linking. */
4823
4824 static bfd_boolean
4825 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4826 {
4827 flagword old_flags, old_partial;
4828 flagword new_flags, new_partial;
4829 bfd_boolean error = FALSE;
4830
4831 new_flags = elf_elfheader (ibfd)->e_flags;
4832 old_flags = elf_elfheader (obfd)->e_flags;
4833
4834 if (new_flags & EF_BFIN_FDPIC)
4835 new_flags &= ~EF_BFIN_PIC;
4836
4837 #ifdef DEBUG
4838 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4839 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
4840 bfd_get_filename (ibfd));
4841 #endif
4842
4843 if (!elf_flags_init (obfd)) /* First call, no flags set. */
4844 {
4845 elf_flags_init (obfd) = TRUE;
4846 old_flags = new_flags;
4847 }
4848
4849 else if (new_flags == old_flags) /* Compatible flags are ok. */
4850 ;
4851
4852 else /* Possibly incompatible flags. */
4853 {
4854 /* We don't have to do anything if the pic flags are the same, or the new
4855 module(s) were compiled with -mlibrary-pic. */
4856 new_partial = (new_flags & EF_BFIN_PIC_FLAGS);
4857 old_partial = (old_flags & EF_BFIN_PIC_FLAGS);
4858 if (new_partial == old_partial)
4859 ;
4860
4861 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
4862 else if (new_partial != 0 && old_partial != 0)
4863 old_flags |= new_partial;
4864
4865 /* One module was compiled for pic and the other was not, see if we have
4866 had any relocations that are not pic-safe. */
4867 else
4868 old_flags |= new_partial;
4869
4870 }
4871
4872 /* Update the old flags now with changes made above. */
4873 elf_elfheader (obfd)->e_flags = old_flags;
4874
4875 if (((new_flags & EF_BFIN_FDPIC) == 0)
4876 != (! IS_FDPIC (ibfd)))
4877 {
4878 error = TRUE;
4879 if (IS_FDPIC (obfd))
4880 (*_bfd_error_handler)
4881 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4882 bfd_get_filename (ibfd));
4883 else
4884 (*_bfd_error_handler)
4885 (_("%s: cannot link fdpic object file into non-fdpic executable"),
4886 bfd_get_filename (ibfd));
4887 }
4888
4889 if (error)
4890 bfd_set_error (bfd_error_bad_value);
4891
4892 return !error;
4893 }
4894 \f
4895 /* bfin ELF linker hash entry. */
4896
4897 struct bfin_link_hash_entry
4898 {
4899 struct elf_link_hash_entry root;
4900
4901 /* Number of PC relative relocs copied for this symbol. */
4902 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
4903 };
4904
4905 /* bfin ELF linker hash table. */
4906
4907 struct bfin_link_hash_table
4908 {
4909 struct elf_link_hash_table root;
4910
4911 /* Small local sym to section mapping cache. */
4912 struct sym_sec_cache sym_sec;
4913 };
4914
4915 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4916
4917 static struct bfd_hash_entry *
4918 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
4919 struct bfd_hash_table *table, const char *string)
4920 {
4921 struct bfd_hash_entry *ret = entry;
4922
4923 /* Allocate the structure if it has not already been allocated by a
4924 subclass. */
4925 if (ret == NULL)
4926 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
4927 if (ret == NULL)
4928 return ret;
4929
4930 /* Call the allocation method of the superclass. */
4931 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
4932 if (ret != NULL)
4933 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
4934
4935 return ret;
4936 }
4937
4938 /* Create an bfin ELF linker hash table. */
4939
4940 static struct bfd_link_hash_table *
4941 bfin_link_hash_table_create (bfd * abfd)
4942 {
4943 struct bfin_link_hash_table *ret;
4944 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
4945
4946 ret = bfd_zalloc (abfd, amt);
4947 if (ret == NULL)
4948 return NULL;
4949
4950 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
4951 bfin_link_hash_newfunc,
4952 sizeof (struct elf_link_hash_entry)))
4953 {
4954 free (ret);
4955 return NULL;
4956 }
4957
4958 ret->sym_sec.abfd = NULL;
4959
4960 return &ret->root.root;
4961 }
4962
4963 /* The size in bytes of an entry in the procedure linkage table. */
4964
4965 /* Finish up the dynamic sections. */
4966
4967 static bfd_boolean
4968 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4969 struct bfd_link_info *info)
4970 {
4971 bfd *dynobj;
4972 asection *sdyn;
4973
4974 dynobj = elf_hash_table (info)->dynobj;
4975
4976 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4977
4978 if (elf_hash_table (info)->dynamic_sections_created)
4979 {
4980 Elf32_External_Dyn *dyncon, *dynconend;
4981
4982 BFD_ASSERT (sdyn != NULL);
4983
4984 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4985 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4986 for (; dyncon < dynconend; dyncon++)
4987 {
4988 Elf_Internal_Dyn dyn;
4989
4990 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4991
4992 }
4993
4994 }
4995 return TRUE;
4996 }
4997
4998 /* Finish up dynamic symbol handling. We set the contents of various
4999 dynamic sections here. */
5000
5001 static bfd_boolean
5002 bfin_finish_dynamic_symbol (bfd * output_bfd,
5003 struct bfd_link_info *info,
5004 struct elf_link_hash_entry *h,
5005 Elf_Internal_Sym * sym)
5006 {
5007 bfd *dynobj;
5008
5009 dynobj = elf_hash_table (info)->dynobj;
5010
5011 if (h->got.offset != (bfd_vma) - 1)
5012 {
5013 asection *sgot;
5014 asection *srela;
5015 Elf_Internal_Rela rela;
5016 bfd_byte *loc;
5017
5018 /* This symbol has an entry in the global offset table.
5019 Set it up. */
5020
5021 sgot = bfd_get_section_by_name (dynobj, ".got");
5022 srela = bfd_get_section_by_name (dynobj, ".rela.got");
5023 BFD_ASSERT (sgot != NULL && srela != NULL);
5024
5025 rela.r_offset = (sgot->output_section->vma
5026 + sgot->output_offset
5027 + (h->got.offset & ~(bfd_vma) 1));
5028
5029 /* If this is a -Bsymbolic link, and the symbol is defined
5030 locally, we just want to emit a RELATIVE reloc. Likewise if
5031 the symbol was forced to be local because of a version file.
5032 The entry in the global offset table will already have been
5033 initialized in the relocate_section function. */
5034 if (info->shared
5035 && (info->symbolic
5036 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5037 {
5038 fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__);
5039 rela.r_info = ELF32_R_INFO (0, R_pcrel24);
5040 rela.r_addend = bfd_get_signed_32 (output_bfd,
5041 (sgot->contents
5042 +
5043 (h->got.
5044 offset & ~(bfd_vma) 1)));
5045 }
5046 else
5047 {
5048 bfd_put_32 (output_bfd, (bfd_vma) 0,
5049 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5050 rela.r_info = ELF32_R_INFO (h->dynindx, R_got);
5051 rela.r_addend = 0;
5052 }
5053
5054 loc = srela->contents;
5055 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5056 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5057 }
5058
5059 if (h->needs_copy)
5060 {
5061 BFD_ASSERT (0);
5062 }
5063 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5064 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5065 || h == elf_hash_table (info)->hgot)
5066 sym->st_shndx = SHN_ABS;
5067
5068 return TRUE;
5069 }
5070
5071 /* Adjust a symbol defined by a dynamic object and referenced by a
5072 regular object. The current definition is in some section of the
5073 dynamic object, but we're not including those sections. We have to
5074 change the definition to something the rest of the link can
5075 understand. */
5076
5077 static bfd_boolean
5078 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5079 struct elf_link_hash_entry *h)
5080 {
5081 bfd *dynobj;
5082 asection *s;
5083 unsigned int power_of_two;
5084
5085 dynobj = elf_hash_table (info)->dynobj;
5086
5087 /* Make sure we know what is going on here. */
5088 BFD_ASSERT (dynobj != NULL
5089 && (h->needs_plt
5090 || h->u.weakdef != NULL
5091 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5092
5093 /* If this is a function, put it in the procedure linkage table. We
5094 will fill in the contents of the procedure linkage table later,
5095 when we know the address of the .got section. */
5096 if (h->type == STT_FUNC || h->needs_plt)
5097 {
5098 BFD_ASSERT(0);
5099 }
5100
5101 /* If this is a weak symbol, and there is a real definition, the
5102 processor independent code will have arranged for us to see the
5103 real definition first, and we can just use the same value. */
5104 if (h->u.weakdef != NULL)
5105 {
5106 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5107 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5108 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5109 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5110 return TRUE;
5111 }
5112
5113 /* This is a reference to a symbol defined by a dynamic object which
5114 is not a function. */
5115
5116 /* If we are creating a shared library, we must presume that the
5117 only references to the symbol are via the global offset table.
5118 For such cases we need not do anything here; the relocations will
5119 be handled correctly by relocate_section. */
5120 if (info->shared)
5121 return TRUE;
5122
5123 /* We must allocate the symbol in our .dynbss section, which will
5124 become part of the .bss section of the executable. There will be
5125 an entry for this symbol in the .dynsym section. The dynamic
5126 object will contain position independent code, so all references
5127 from the dynamic object to this symbol will go through the global
5128 offset table. The dynamic linker will use the .dynsym entry to
5129 determine the address it must put in the global offset table, so
5130 both the dynamic object and the regular object will refer to the
5131 same memory location for the variable. */
5132
5133 s = bfd_get_section_by_name (dynobj, ".dynbss");
5134 BFD_ASSERT (s != NULL);
5135
5136 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5137 copy the initial value out of the dynamic object and into the
5138 runtime process image. We need to remember the offset into the
5139 .rela.bss section we are going to use. */
5140 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5141 {
5142 asection *srel;
5143
5144 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
5145 BFD_ASSERT (srel != NULL);
5146 srel->size += sizeof (Elf32_External_Rela);
5147 h->needs_copy = 1;
5148 }
5149
5150 /* We need to figure out the alignment required for this symbol. I
5151 have no idea how ELF linkers handle this. */
5152 power_of_two = bfd_log2 (h->size);
5153 if (power_of_two > 3)
5154 power_of_two = 3;
5155
5156 /* Apply the required alignment. */
5157 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5158 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5159 {
5160 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5161 return FALSE;
5162 }
5163
5164 /* Define the symbol as being at this point in the section. */
5165 h->root.u.def.section = s;
5166 h->root.u.def.value = s->size;
5167
5168 /* Increment the section size to make room for the symbol. */
5169 s->size += h->size;
5170
5171 return TRUE;
5172 }
5173
5174 /* The bfin linker needs to keep track of the number of relocs that it
5175 decides to copy in check_relocs for each symbol. This is so that it
5176 can discard PC relative relocs if it doesn't need them when linking
5177 with -Bsymbolic. We store the information in a field extending the
5178 regular ELF linker hash table. */
5179
5180 /* This structure keeps track of the number of PC relative relocs we have
5181 copied for a given symbol. */
5182
5183 struct bfin_pcrel_relocs_copied
5184 {
5185 /* Next section. */
5186 struct bfin_pcrel_relocs_copied *next;
5187 /* A section in dynobj. */
5188 asection *section;
5189 /* Number of relocs copied in this section. */
5190 bfd_size_type count;
5191 };
5192
5193 /* This function is called via elf_link_hash_traverse if we are
5194 creating a shared object. In the -Bsymbolic case it discards the
5195 space allocated to copy PC relative relocs against symbols which
5196 are defined in regular objects. For the normal shared case, it
5197 discards space for pc-relative relocs that have become local due to
5198 symbol visibility changes. We allocated space for them in the
5199 check_relocs routine, but we won't fill them in in the
5200 relocate_section routine.
5201
5202 We also check whether any of the remaining relocations apply
5203 against a readonly section, and set the DF_TEXTREL flag in this
5204 case. */
5205
5206 static bfd_boolean
5207 bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
5208 {
5209 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5210 struct bfin_pcrel_relocs_copied *s;
5211
5212 if (h->root.type == bfd_link_hash_warning)
5213 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5214
5215 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5216 {
5217 if ((info->flags & DF_TEXTREL) == 0)
5218 {
5219 /* Look for relocations against read-only sections. */
5220 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5221 s != NULL; s = s->next)
5222 if ((s->section->flags & SEC_READONLY) != 0)
5223 {
5224 info->flags |= DF_TEXTREL;
5225 break;
5226 }
5227 }
5228
5229 return TRUE;
5230 }
5231
5232 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5233 s != NULL; s = s->next)
5234 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5235
5236 return TRUE;
5237 }
5238
5239 static bfd_boolean
5240 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5241 struct bfd_link_info *info)
5242 {
5243 bfd *dynobj;
5244 asection *s;
5245 bfd_boolean relocs;
5246
5247 dynobj = elf_hash_table (info)->dynobj;
5248 BFD_ASSERT (dynobj != NULL);
5249
5250 if (elf_hash_table (info)->dynamic_sections_created)
5251 {
5252 /* Set the contents of the .interp section to the interpreter. */
5253 if (info->executable)
5254 {
5255 s = bfd_get_section_by_name (dynobj, ".interp");
5256 BFD_ASSERT (s != NULL);
5257 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5258 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5259 }
5260 }
5261 else
5262 {
5263 /* We may have created entries in the .rela.got section.
5264 However, if we are not creating the dynamic sections, we will
5265 not actually use these entries. Reset the size of .rela.got,
5266 which will cause it to get stripped from the output file
5267 below. */
5268 s = bfd_get_section_by_name (dynobj, ".rela.got");
5269 if (s != NULL)
5270 s->size = 0;
5271 }
5272
5273 /* If this is a -Bsymbolic shared link, then we need to discard all
5274 PC relative relocs against symbols defined in a regular object.
5275 For the normal shared case we discard the PC relative relocs
5276 against symbols that have become local due to visibility changes.
5277 We allocated space for them in the check_relocs routine, but we
5278 will not fill them in in the relocate_section routine. */
5279 if (info->shared)
5280 elf_link_hash_traverse (elf_hash_table (info),
5281 bfin_discard_copies, (PTR) info);
5282
5283 /* The check_relocs and adjust_dynamic_symbol entry points have
5284 determined the sizes of the various dynamic sections. Allocate
5285 memory for them. */
5286 relocs = FALSE;
5287 for (s = dynobj->sections; s != NULL; s = s->next)
5288 {
5289 const char *name;
5290 bfd_boolean strip;
5291
5292 if ((s->flags & SEC_LINKER_CREATED) == 0)
5293 continue;
5294
5295 /* It's OK to base decisions on the section name, because none
5296 of the dynobj section names depend upon the input files. */
5297 name = bfd_get_section_name (dynobj, s);
5298
5299 strip = FALSE;
5300
5301 if (strncmp (name, ".rela", 5) == 0)
5302 {
5303 if (s->size == 0)
5304 {
5305 /* If we don't need this section, strip it from the
5306 output file. This is mostly to handle .rela.bss and
5307 .rela.plt. We must create both sections in
5308 create_dynamic_sections, because they must be created
5309 before the linker maps input sections to output
5310 sections. The linker does that before
5311 adjust_dynamic_symbol is called, and it is that
5312 function which decides whether anything needs to go
5313 into these sections. */
5314 strip = TRUE;
5315 }
5316 else
5317 {
5318 relocs = TRUE;
5319
5320 /* We use the reloc_count field as a counter if we need
5321 to copy relocs into the output file. */
5322 s->reloc_count = 0;
5323 }
5324 }
5325 else if (strncmp (name, ".got", 4) != 0)
5326 {
5327 /* It's not one of our sections, so don't allocate space. */
5328 continue;
5329 }
5330
5331 if (strip)
5332 {
5333 s->flags |= SEC_EXCLUDE;
5334 continue;
5335 }
5336
5337 /* Allocate memory for the section contents. */
5338 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5339 Unused entries should be reclaimed before the section's contents
5340 are written out, but at the moment this does not happen. Thus in
5341 order to prevent writing out garbage, we initialise the section's
5342 contents to zero. */
5343 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5344 if (s->contents == NULL && s->size != 0)
5345 return FALSE;
5346 }
5347
5348 if (elf_hash_table (info)->dynamic_sections_created)
5349 {
5350 /* Add some entries to the .dynamic section. We fill in the
5351 values later, in bfin_finish_dynamic_sections, but we
5352 must add the entries now so that we get the correct size for
5353 the .dynamic section. The DT_DEBUG entry is filled in by the
5354 dynamic linker and used by the debugger. */
5355 #define add_dynamic_entry(TAG, VAL) \
5356 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5357
5358 if (!info->shared)
5359 {
5360 if (!add_dynamic_entry (DT_DEBUG, 0))
5361 return FALSE;
5362 }
5363
5364
5365 if (relocs)
5366 {
5367 if (!add_dynamic_entry (DT_RELA, 0)
5368 || !add_dynamic_entry (DT_RELASZ, 0)
5369 || !add_dynamic_entry (DT_RELAENT,
5370 sizeof (Elf32_External_Rela)))
5371 return FALSE;
5372 }
5373
5374 if ((info->flags & DF_TEXTREL) != 0)
5375 {
5376 if (!add_dynamic_entry (DT_TEXTREL, 0))
5377 return FALSE;
5378 }
5379 }
5380 #undef add_dynamic_entry
5381
5382 return TRUE;
5383 }
5384 \f
5385 /* Given a .data section and a .emreloc in-memory section, store
5386 relocation information into the .emreloc section which can be
5387 used at runtime to relocate the section. This is called by the
5388 linker when the --embedded-relocs switch is used. This is called
5389 after the add_symbols entry point has been called for all the
5390 objects, and before the final_link entry point is called. */
5391
5392 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5393 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
5394
5395 bfd_boolean
5396 bfd_bfin_elf32_create_embedded_relocs (
5397 bfd *abfd,
5398 struct bfd_link_info *info,
5399 asection *datasec,
5400 asection *relsec,
5401 char **errmsg)
5402 {
5403 Elf_Internal_Shdr *symtab_hdr;
5404 Elf_Internal_Sym *isymbuf = NULL;
5405 Elf_Internal_Rela *internal_relocs = NULL;
5406 Elf_Internal_Rela *irel, *irelend;
5407 bfd_byte *p;
5408 bfd_size_type amt;
5409
5410 BFD_ASSERT (! info->relocatable);
5411
5412 *errmsg = NULL;
5413
5414 if (datasec->reloc_count == 0)
5415 return TRUE;
5416
5417 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5418
5419 /* Get a copy of the native relocations. */
5420 internal_relocs = (_bfd_elf_link_read_relocs
5421 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
5422 info->keep_memory));
5423 if (internal_relocs == NULL)
5424 goto error_return;
5425
5426 amt = (bfd_size_type) datasec->reloc_count * 12;
5427 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5428 if (relsec->contents == NULL)
5429 goto error_return;
5430
5431 p = relsec->contents;
5432
5433 irelend = internal_relocs + datasec->reloc_count;
5434 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5435 {
5436 asection *targetsec;
5437
5438 /* We are going to write a four byte longword into the runtime
5439 reloc section. The longword will be the address in the data
5440 section which must be relocated. It is followed by the name
5441 of the target section NUL-padded or truncated to 8
5442 characters. */
5443
5444 /* We can only relocate absolute longword relocs at run time. */
5445 if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data)
5446 {
5447 *errmsg = _("unsupported reloc type");
5448 bfd_set_error (bfd_error_bad_value);
5449 goto error_return;
5450 }
5451
5452 /* Get the target section referred to by the reloc. */
5453 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5454 {
5455 /* A local symbol. */
5456 Elf_Internal_Sym *isym;
5457
5458 /* Read this BFD's local symbols if we haven't done so already. */
5459 if (isymbuf == NULL)
5460 {
5461 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5462 if (isymbuf == NULL)
5463 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5464 symtab_hdr->sh_info, 0,
5465 NULL, NULL, NULL);
5466 if (isymbuf == NULL)
5467 goto error_return;
5468 }
5469
5470 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5471 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5472 }
5473 else
5474 {
5475 unsigned long indx;
5476 struct elf_link_hash_entry *h;
5477
5478 /* An external symbol. */
5479 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5480 h = elf_sym_hashes (abfd)[indx];
5481 BFD_ASSERT (h != NULL);
5482 if (h->root.type == bfd_link_hash_defined
5483 || h->root.type == bfd_link_hash_defweak)
5484 targetsec = h->root.u.def.section;
5485 else
5486 targetsec = NULL;
5487 }
5488
5489 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5490 memset (p + 4, 0, 8);
5491 if (targetsec != NULL)
5492 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5493 }
5494
5495 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5496 free (isymbuf);
5497 if (internal_relocs != NULL
5498 && elf_section_data (datasec)->relocs != internal_relocs)
5499 free (internal_relocs);
5500 return TRUE;
5501
5502 error_return:
5503 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5504 free (isymbuf);
5505 if (internal_relocs != NULL
5506 && elf_section_data (datasec)->relocs != internal_relocs)
5507 free (internal_relocs);
5508 return FALSE;
5509 }
5510 \f
5511 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5512 #define TARGET_LITTLE_NAME "elf32-bfin"
5513 #define ELF_ARCH bfd_arch_bfin
5514 #define ELF_MACHINE_CODE EM_BLACKFIN
5515 #define ELF_MAXPAGESIZE 0x1000
5516 #define elf_symbol_leading_char '_'
5517
5518 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5519 #define elf_info_to_howto bfin_info_to_howto
5520 #define elf_info_to_howto_rel 0
5521 #define elf_backend_object_p elf32_bfin_object_p
5522
5523 #define bfd_elf32_bfd_is_local_label_name \
5524 bfin_is_local_label_name
5525 #define bfin_hash_table(p) \
5526 ((struct bfin_link_hash_table *) (p)->hash)
5527
5528
5529
5530 #define elf_backend_create_dynamic_sections \
5531 _bfd_elf_create_dynamic_sections
5532 #define bfd_elf32_bfd_link_hash_table_create \
5533 bfin_link_hash_table_create
5534 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5535
5536 #define elf_backend_check_relocs bfin_check_relocs
5537 #define elf_backend_adjust_dynamic_symbol \
5538 bfin_adjust_dynamic_symbol
5539 #define elf_backend_size_dynamic_sections \
5540 bfin_size_dynamic_sections
5541 #define elf_backend_relocate_section bfin_relocate_section
5542 #define elf_backend_finish_dynamic_symbol \
5543 bfin_finish_dynamic_symbol
5544 #define elf_backend_finish_dynamic_sections \
5545 bfin_finish_dynamic_sections
5546 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5547 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5548 #define bfd_elf32_bfd_merge_private_bfd_data \
5549 elf32_bfin_merge_private_bfd_data
5550 #define bfd_elf32_bfd_set_private_flags \
5551 elf32_bfin_set_private_flags
5552 #define bfd_elf32_bfd_print_private_bfd_data \
5553 elf32_bfin_print_private_bfd_data
5554 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5555 #define elf_backend_can_gc_sections 1
5556 #define elf_backend_can_refcount 1
5557 #define elf_backend_want_got_plt 0
5558 #define elf_backend_plt_readonly 1
5559 #define elf_backend_want_plt_sym 0
5560 #define elf_backend_got_header_size 12
5561 #define elf_backend_rela_normal 1
5562
5563 #include "elf32-target.h"
5564
5565 #undef TARGET_LITTLE_SYM
5566 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5567 #undef TARGET_LITTLE_NAME
5568 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5569 #undef elf32_bed
5570 #define elf32_bed elf32_bfinfdpic_bed
5571
5572 #undef elf_backend_gc_sweep_hook
5573 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5574
5575 #undef elf_backend_got_header_size
5576 #define elf_backend_got_header_size 0
5577
5578 #undef elf_backend_relocate_section
5579 #define elf_backend_relocate_section bfinfdpic_relocate_section
5580 #undef elf_backend_check_relocs
5581 #define elf_backend_check_relocs bfinfdpic_check_relocs
5582
5583 #undef bfd_elf32_bfd_link_hash_table_create
5584 #define bfd_elf32_bfd_link_hash_table_create \
5585 bfinfdpic_elf_link_hash_table_create
5586 #undef elf_backend_always_size_sections
5587 #define elf_backend_always_size_sections \
5588 elf32_bfinfdpic_always_size_sections
5589 #undef elf_backend_modify_segment_map
5590 #define elf_backend_modify_segment_map \
5591 elf32_bfinfdpic_modify_segment_map
5592 #undef bfd_elf32_bfd_copy_private_bfd_data
5593 #define bfd_elf32_bfd_copy_private_bfd_data \
5594 elf32_bfinfdpic_copy_private_bfd_data
5595
5596 #undef elf_backend_create_dynamic_sections
5597 #define elf_backend_create_dynamic_sections \
5598 elf32_bfinfdpic_create_dynamic_sections
5599 #undef elf_backend_adjust_dynamic_symbol
5600 #define elf_backend_adjust_dynamic_symbol \
5601 elf32_bfinfdpic_adjust_dynamic_symbol
5602 #undef elf_backend_size_dynamic_sections
5603 #define elf_backend_size_dynamic_sections \
5604 elf32_bfinfdpic_size_dynamic_sections
5605 #undef elf_backend_finish_dynamic_symbol
5606 #define elf_backend_finish_dynamic_symbol \
5607 elf32_bfinfdpic_finish_dynamic_symbol
5608 #undef elf_backend_finish_dynamic_sections
5609 #define elf_backend_finish_dynamic_sections \
5610 elf32_bfinfdpic_finish_dynamic_sections
5611
5612 #undef elf_backend_can_make_relative_eh_frame
5613 #define elf_backend_can_make_relative_eh_frame \
5614 bfinfdpic_elf_use_relative_eh_frame
5615 #undef elf_backend_can_make_lsda_relative_eh_frame
5616 #define elf_backend_can_make_lsda_relative_eh_frame \
5617 bfinfdpic_elf_use_relative_eh_frame
5618 #undef elf_backend_encode_eh_address
5619 #define elf_backend_encode_eh_address \
5620 bfinfdpic_elf_encode_eh_address
5621
5622 #undef elf_backend_may_use_rel_p
5623 #define elf_backend_may_use_rel_p 1
5624 #undef elf_backend_may_use_rela_p
5625 #define elf_backend_may_use_rela_p 1
5626 /* We use REL for dynamic relocations only. */
5627 #undef elf_backend_default_use_rela_p
5628 #define elf_backend_default_use_rela_p 1
5629
5630 #undef elf_backend_omit_section_dynsym
5631 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5632
5633 #include "elf32-target.h"
git-cvsimport of binutils cvsroot