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PowerPC addpcis fix
[binutils.git] / bfd / elf32-nios2.c
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36591ba1 1/* 32-bit ELF support for Nios II.
2571583a 2 Copyright (C) 2012-2017 Free Software Foundation, Inc.
36591ba1
SL		 3 Contributed by Nigel Gray ([email protected]).
4 Contributed by Mentor Graphics, Inc.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23/* This file handles Altera Nios II ELF targets. */
24
25#include "sysdep.h"
26#include "bfd.h"
27#include "libbfd.h"
28#include "bfdlink.h"
29#include "genlink.h"
30#include "elf-bfd.h"
31#include "elf/nios2.h"
32#include "opcode/nios2.h"
78058a5e 33#include "elf32-nios2.h"
36591ba1
SL		 34
35/* Use RELA relocations. */
36#ifndef USE_RELA
37#define USE_RELA
38#endif
39
40#ifdef USE_REL
41#undef USE_REL
42#endif
43
44/* Forward declarations. */
45static bfd_reloc_status_type nios2_elf32_ignore_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47static bfd_reloc_status_type nios2_elf32_hi16_relocate
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49static bfd_reloc_status_type nios2_elf32_lo16_relocate
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51static bfd_reloc_status_type nios2_elf32_hiadj16_relocate
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57static bfd_reloc_status_type nios2_elf32_pcrel16_relocate
58 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
59static bfd_reloc_status_type nios2_elf32_call26_relocate
60 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
61static bfd_reloc_status_type nios2_elf32_gprel_relocate
62 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
63static bfd_reloc_status_type nios2_elf32_ujmp_relocate
64 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
65static bfd_reloc_status_type nios2_elf32_cjmp_relocate
66 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
67static bfd_reloc_status_type nios2_elf32_callr_relocate
68 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
69
70/* Target vector. */
6d00b590
AM		 71extern const bfd_target nios2_elf32_le_vec;
72extern const bfd_target nios2_elf32_be_vec;
36591ba1
SL		 73
74/* Offset of tp and dtp pointers from start of TLS block. */
75#define TP_OFFSET 0x7000
76#define DTP_OFFSET 0x8000
77
8c163c5a
SL		 78/* The relocation tables used for SHT_REL sections. There are separate
79 tables for R1 and R2 encodings. */
80static reloc_howto_type elf_nios2_r1_howto_table_rel[] = {
36591ba1
SL		 81 /* No relocation. */
82 HOWTO (R_NIOS2_NONE, /* type */
83 0, /* rightshift */
6346d5ca 84 3, /* size (0 = byte, 1 = short, 2 = long) */
36591ba1
SL		 85 0, /* bitsize */
86 FALSE, /* pc_relative */
87 0, /* bitpos */
88 complain_overflow_dont, /* complain_on_overflow */
89 bfd_elf_generic_reloc, /* special_function */
90 "R_NIOS2_NONE", /* name */
91 FALSE, /* partial_inplace */
92 0, /* src_mask */
93 0, /* dst_mask */
94 FALSE), /* pcrel_offset */
95
96 /* 16-bit signed immediate relocation. */
97 HOWTO (R_NIOS2_S16, /* type */
98 0, /* rightshift */
99 2, /* size (0 = byte, 1 = short, 2 = long) */
100 16, /* bitsize */
101 FALSE, /* pc_relative */
102 6, /* bitpos */
103 complain_overflow_signed, /* complain on overflow */
104 bfd_elf_generic_reloc, /* special function */
105 "R_NIOS2_S16", /* name */
106 FALSE, /* partial_inplace */
107 0x003fffc0, /* src_mask */
108 0x003fffc0, /* dest_mask */
109 FALSE), /* pcrel_offset */
110
111 /* 16-bit unsigned immediate relocation. */
112 HOWTO (R_NIOS2_U16, /* type */
113 0, /* rightshift */
114 2, /* size (0 = byte, 1 = short, 2 = long) */
115 16, /* bitsize */
116 FALSE, /* pc_relative */
117 6, /* bitpos */
118 complain_overflow_unsigned, /* complain on overflow */
119 bfd_elf_generic_reloc, /* special function */
120 "R_NIOS2_U16", /* name */
121 FALSE, /* partial_inplace */
122 0x003fffc0, /* src_mask */
123 0x003fffc0, /* dest_mask */
124 FALSE), /* pcrel_offset */
125
126 HOWTO (R_NIOS2_PCREL16, /* type */
127 0, /* rightshift */
128 2, /* size (0 = byte, 1 = short, 2 = long) */
129 16, /* bitsize */
130 TRUE, /* pc_relative */
131 6, /* bitpos */
132 complain_overflow_signed, /* complain on overflow */
133 nios2_elf32_pcrel16_relocate, /* special function */
134 "R_NIOS2_PCREL16", /* name */
135 FALSE, /* partial_inplace */
136 0x003fffc0, /* src_mask */
137 0x003fffc0, /* dest_mask */
138 TRUE), /* pcrel_offset */
139
140 HOWTO (R_NIOS2_CALL26, /* type */
141 2, /* rightshift */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
143 26, /* bitsize */
144 FALSE, /* pc_relative */
145 6, /* bitpos */
146 complain_overflow_dont, /* complain on overflow */
147 nios2_elf32_call26_relocate, /* special function */
148 "R_NIOS2_CALL26", /* name */
149 FALSE, /* partial_inplace */
150 0xffffffc0, /* src_mask */
151 0xffffffc0, /* dst_mask */
152 FALSE), /* pcrel_offset */
153
154 HOWTO (R_NIOS2_IMM5,
155 0,
156 2,
157 5,
158 FALSE,
159 6,
160 complain_overflow_bitfield,
161 bfd_elf_generic_reloc,
162 "R_NIOS2_IMM5",
163 FALSE,
164 0x000007c0,
165 0x000007c0,
166 FALSE),
167
168 HOWTO (R_NIOS2_CACHE_OPX,
169 0,
170 2,
171 5,
172 FALSE,
173 22,
174 complain_overflow_bitfield,
175 bfd_elf_generic_reloc,
176 "R_NIOS2_CACHE_OPX",
177 FALSE,
178 0x07c00000,
179 0x07c00000,
180 FALSE),
181
182 HOWTO (R_NIOS2_IMM6,
183 0,
184 2,
185 6,
186 FALSE,
187 6,
188 complain_overflow_bitfield,
189 bfd_elf_generic_reloc,
190 "R_NIOS2_IMM6",
191 FALSE,
192 0x00000fc0,
193 0x00000fc0,
194 FALSE),
195
196 HOWTO (R_NIOS2_IMM8,
197 0,
198 2,
199 8,
200 FALSE,
201 6,
202 complain_overflow_bitfield,
203 bfd_elf_generic_reloc,
204 "R_NIOS2_IMM8",
205 FALSE,
206 0x00003fc0,
207 0x00003fc0,
208 FALSE),
209
210 HOWTO (R_NIOS2_HI16,
211 0,
212 2,
213 32,
214 FALSE,
215 6,
216 complain_overflow_dont,
217 nios2_elf32_hi16_relocate,
218 "R_NIOS2_HI16",
219 FALSE,
220 0x003fffc0,
221 0x003fffc0,
222 FALSE),
223
224 HOWTO (R_NIOS2_LO16,
225 0,
226 2,
227 32,
228 FALSE,
229 6,
230 complain_overflow_dont,
231 nios2_elf32_lo16_relocate,
232 "R_NIOS2_LO16",
233 FALSE,
234 0x003fffc0,
235 0x003fffc0,
236 FALSE),
237
238 HOWTO (R_NIOS2_HIADJ16,
239 0,
240 2,
241 32,
242 FALSE,
243 6,
244 complain_overflow_dont,
245 nios2_elf32_hiadj16_relocate,
246 "R_NIOS2_HIADJ16",
247 FALSE,
248 0x003fffc0,
249 0x003fffc0,
250 FALSE),
251
252 HOWTO (R_NIOS2_BFD_RELOC_32,
253 0,
254 2, /* long */
255 32,
256 FALSE,
257 0,
258 complain_overflow_dont,
259 bfd_elf_generic_reloc,
260 "R_NIOS2_BFD_RELOC32",
261 FALSE,
262 0xffffffff,
263 0xffffffff,
264 FALSE),
265
266 HOWTO (R_NIOS2_BFD_RELOC_16,
267 0,
268 1, /* short */
269 16,
270 FALSE,
271 0,
272 complain_overflow_bitfield,
273 bfd_elf_generic_reloc,
274 "R_NIOS2_BFD_RELOC16",
275 FALSE,
276 0x0000ffff,
277 0x0000ffff,
278 FALSE),
279
280 HOWTO (R_NIOS2_BFD_RELOC_8,
281 0,
282 0, /* byte */
283 8,
284 FALSE,
285 0,
286 complain_overflow_bitfield,
287 bfd_elf_generic_reloc,
288 "R_NIOS2_BFD_RELOC8",
289 FALSE,
290 0x000000ff,
291 0x000000ff,
292 FALSE),
293
294 HOWTO (R_NIOS2_GPREL,
295 0,
296 2,
297 32,
298 FALSE,
299 6,
300 complain_overflow_dont,
301 nios2_elf32_gprel_relocate,
302 "R_NIOS2_GPREL",
303 FALSE,
304 0x003fffc0,
305 0x003fffc0,
306 FALSE),
307
308 HOWTO (R_NIOS2_GNU_VTINHERIT,
309 0,
310 2, /* short */
311 0,
312 FALSE,
313 0,
314 complain_overflow_dont,
315 NULL,
316 "R_NIOS2_GNU_VTINHERIT",
317 FALSE,
318 0,
319 0,
320 FALSE),
321
322 HOWTO (R_NIOS2_GNU_VTENTRY,
323 0,
324 2, /* byte */
325 0,
326 FALSE,
327 0,
328 complain_overflow_dont,
329 _bfd_elf_rel_vtable_reloc_fn,
330 "R_NIOS2_GNU_VTENTRY",
331 FALSE,
332 0,
333 0,
334 FALSE),
335
336 HOWTO (R_NIOS2_UJMP,
337 0,
338 2,
339 32,
340 FALSE,
341 6,
342 complain_overflow_dont,
343 nios2_elf32_ujmp_relocate,
344 "R_NIOS2_UJMP",
345 FALSE,
346 0x003fffc0,
347 0x003fffc0,
348 FALSE),
349
350 HOWTO (R_NIOS2_CJMP,
351 0,
352 2,
353 32,
354 FALSE,
355 6,
356 complain_overflow_dont,
357 nios2_elf32_cjmp_relocate,
358 "R_NIOS2_CJMP",
359 FALSE,
360 0x003fffc0,
361 0x003fffc0,
362 FALSE),
363
364 HOWTO (R_NIOS2_CALLR,
365 0,
366 2,
367 32,
368 FALSE,
369 6,
370 complain_overflow_dont,
371 nios2_elf32_callr_relocate,
372 "R_NIOS2_CALLR",
373 FALSE,
374 0x003fffc0,
375 0x003fffc0,
376 FALSE),
377
378 HOWTO (R_NIOS2_ALIGN,
379 0,
380 2,
381 0,
382 FALSE,
383 0,
384 complain_overflow_dont,
385 nios2_elf32_ignore_reloc,
386 "R_NIOS2_ALIGN",
387 FALSE,
388 0,
389 0,
390 TRUE),
391
392
393 HOWTO (R_NIOS2_GOT16,
394 0,
395 2,
396 16,
397 FALSE,
398 6,
399 complain_overflow_bitfield,
400 bfd_elf_generic_reloc,
401 "R_NIOS2_GOT16",
402 FALSE,
403 0x003fffc0,
404 0x003fffc0,
405 FALSE),
406
407 HOWTO (R_NIOS2_CALL16,
408 0,
409 2,
410 16,
411 FALSE,
412 6,
413 complain_overflow_bitfield,
414 bfd_elf_generic_reloc,
415 "R_NIOS2_CALL16",
416 FALSE,
417 0x003fffc0,
418 0x003fffc0,
419 FALSE),
420
421 HOWTO (R_NIOS2_GOTOFF_LO,
422 0,
423 2,
424 16,
425 FALSE,
426 6,
427 complain_overflow_dont,
428 bfd_elf_generic_reloc,
429 "R_NIOS2_GOTOFF_LO",
430 FALSE,
431 0x003fffc0,
432 0x003fffc0,
433 FALSE),
434
435 HOWTO (R_NIOS2_GOTOFF_HA,
436 0,
437 2,
438 16,
439 FALSE,
440 6,
441 complain_overflow_dont,
442 bfd_elf_generic_reloc,
443 "R_NIOS2_GOTOFF_HA",
444 FALSE,
445 0x003fffc0,
446 0x003fffc0,
447 FALSE),
448
449 HOWTO (R_NIOS2_PCREL_LO,
450 0,
451 2,
452 16,
453 TRUE,
454 6,
455 complain_overflow_dont,
456 nios2_elf32_pcrel_lo16_relocate,
457 "R_NIOS2_PCREL_LO",
458 FALSE,
459 0x003fffc0,
460 0x003fffc0,
461 TRUE),
462
463 HOWTO (R_NIOS2_PCREL_HA,
464 0,
465 2,
466 16,
467 FALSE, /* This is a PC-relative relocation, but we need to subtract
468 PC ourselves before the HIADJ. */
469 6,
470 complain_overflow_dont,
471 nios2_elf32_pcrel_hiadj16_relocate,
472 "R_NIOS2_PCREL_HA",
473 FALSE,
474 0x003fffc0,
475 0x003fffc0,
476 TRUE),
477
478 HOWTO (R_NIOS2_TLS_GD16,
479 0,
480 2,
481 16,
482 FALSE,
483 6,
484 complain_overflow_bitfield,
485 bfd_elf_generic_reloc,
486 "R_NIOS2_TLS_GD16",
487 FALSE,
488 0x003fffc0,
489 0x003fffc0,
490 FALSE),
491
492 HOWTO (R_NIOS2_TLS_LDM16,
493 0,
494 2,
495 16,
496 FALSE,
497 6,
498 complain_overflow_bitfield,
499 bfd_elf_generic_reloc,
500 "R_NIOS2_TLS_LDM16",
501 FALSE,
502 0x003fffc0,
503 0x003fffc0,
504 FALSE),
505
506 HOWTO (R_NIOS2_TLS_LDO16,
507 0,
508 2,
509 16,
510 FALSE,
511 6,
512 complain_overflow_bitfield,
513 bfd_elf_generic_reloc,
514 "R_NIOS2_TLS_LDO16",
515 FALSE,
516 0x003fffc0,
517 0x003fffc0,
518 FALSE),
519
520 HOWTO (R_NIOS2_TLS_IE16,
521 0,
522 2,
523 16,
524 FALSE,
525 6,
526 complain_overflow_bitfield,
527 bfd_elf_generic_reloc,
528 "R_NIOS2_TLS_IE16",
529 FALSE,
530 0x003fffc0,
531 0x003fffc0,
532 FALSE),
533
534 HOWTO (R_NIOS2_TLS_LE16,
535 0,
536 2,
537 16,
538 FALSE,
539 6,
540 complain_overflow_bitfield,
541 bfd_elf_generic_reloc,
542 "R_NIOS2_TLS_LE16",
543 FALSE,
544 0x003fffc0,
545 0x003fffc0,
546 FALSE),
547
548 HOWTO (R_NIOS2_TLS_DTPMOD,
549 0,
550 2,
551 32,
552 FALSE,
553 0,
554 complain_overflow_dont,
555 bfd_elf_generic_reloc,
556 "R_NIOS2_TLS_DTPMOD",
557 FALSE,
558 0xffffffff,
559 0xffffffff,
560 FALSE),
561
562 HOWTO (R_NIOS2_TLS_DTPREL,
563 0,
564 2,
565 32,
566 FALSE,
567 0,
568 complain_overflow_dont,
569 bfd_elf_generic_reloc,
570 "R_NIOS2_TLS_DTPREL",
571 FALSE,
572 0xffffffff,
573 0xffffffff,
574 FALSE),
575
576 HOWTO (R_NIOS2_TLS_TPREL,
577 0,
578 2,
579 32,
580 FALSE,
581 0,
582 complain_overflow_dont,
583 bfd_elf_generic_reloc,
584 "R_NIOS2_TLS_TPREL",
585 FALSE,
586 0xffffffff,
587 0xffffffff,
588 FALSE),
589
590 HOWTO (R_NIOS2_COPY,
591 0,
592 2,
593 32,
594 FALSE,
595 0,
596 complain_overflow_dont,
597 bfd_elf_generic_reloc,
598 "R_NIOS2_COPY",
599 FALSE,
600 0,
601 0,
602 FALSE),
603
604 HOWTO (R_NIOS2_GLOB_DAT,
605 0,
606 2,
607 32,
608 FALSE,
609 0,
610 complain_overflow_dont,
611 bfd_elf_generic_reloc,
612 "R_NIOS2_GLOB_DAT",
613 FALSE,
614 0xffffffff,
615 0xffffffff,
616 FALSE),
617
618 HOWTO (R_NIOS2_JUMP_SLOT,
619 0,
620 2,
621 32,
622 FALSE,
623 0,
624 complain_overflow_dont,
625 bfd_elf_generic_reloc,
626 "R_NIOS2_JUMP_SLOT",
627 FALSE,
628 0xffffffff,
629 0xffffffff,
630 FALSE),
631
632 HOWTO (R_NIOS2_RELATIVE,
633 0,
634 2,
635 32,
636 FALSE,
637 0,
638 complain_overflow_dont,
639 bfd_elf_generic_reloc,
640 "R_NIOS2_RELATIVE",
641 FALSE,
642 0xffffffff,
643 0xffffffff,
644 FALSE),
645
646 HOWTO (R_NIOS2_GOTOFF,
647 0,
648 2,
649 32,
650 FALSE,
651 0,
652 complain_overflow_dont,
653 bfd_elf_generic_reloc,
654 "R_NIOS2_GOTOFF",
655 FALSE,
656 0xffffffff,
657 0xffffffff,
658 FALSE),
659
78058a5e
SL		 660 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
661 2, /* rightshift */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
663 26, /* bitsize */
664 FALSE, /* pc_relative */
665 6, /* bitpos */
666 complain_overflow_dont, /* complain on overflow */
667 nios2_elf32_call26_relocate, /* special function */
668 "R_NIOS2_CALL26_NOAT", /* name */
669 FALSE, /* partial_inplace */
670 0xffffffc0, /* src_mask */
671 0xffffffc0, /* dst_mask */
672 FALSE), /* pcrel_offset */
673
1c2de463
SL		 674 HOWTO (R_NIOS2_GOT_LO,
675 0,
676 2,
677 16,
678 FALSE,
679 6,
680 complain_overflow_dont,
681 bfd_elf_generic_reloc,
682 "R_NIOS2_GOT_LO",
683 FALSE,
684 0x003fffc0,
685 0x003fffc0,
686 FALSE),
687
688 HOWTO (R_NIOS2_GOT_HA,
689 0,
690 2,
691 16,
692 FALSE,
693 6,
694 complain_overflow_dont,
695 bfd_elf_generic_reloc,
696 "R_NIOS2_GOT_HA",
697 FALSE,
698 0x003fffc0,
699 0x003fffc0,
700 FALSE),
701
702 HOWTO (R_NIOS2_CALL_LO,
703 0,
704 2,
705 16,
706 FALSE,
707 6,
708 complain_overflow_dont,
709 bfd_elf_generic_reloc,
710 "R_NIOS2_CALL_LO",
711 FALSE,
712 0x003fffc0,
713 0x003fffc0,
714 FALSE),
715
716 HOWTO (R_NIOS2_CALL_HA,
717 0,
718 2,
719 16,
720 FALSE,
721 6,
722 complain_overflow_dont,
723 bfd_elf_generic_reloc,
724 "R_NIOS2_CALL_HA",
725 FALSE,
726 0x003fffc0,
727 0x003fffc0,
728 FALSE),
729
36591ba1
SL		 730/* Add other relocations here. */
731};
732
8c163c5a
SL		 733static reloc_howto_type elf_nios2_r2_howto_table_rel[] = {
734 /* No relocation. */
735 HOWTO (R_NIOS2_NONE, /* type */
736 0, /* rightshift */
737 0, /* size (0 = byte, 1 = short, 2 = long) */
738 0, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_dont, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_NIOS2_NONE", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* 16-bit signed immediate relocation. */
750 HOWTO (R_NIOS2_S16, /* type */
751 0, /* rightshift */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
753 16, /* bitsize */
754 FALSE, /* pc_relative */
755 16, /* bitpos */
756 complain_overflow_signed, /* complain on overflow */
757 bfd_elf_generic_reloc, /* special function */
758 "R_NIOS2_S16", /* name */
759 FALSE, /* partial_inplace */
760 0xffff0000, /* src_mask */
761 0xffff0000, /* dest_mask */
762 FALSE), /* pcrel_offset */
763
764 /* 16-bit unsigned immediate relocation. */
765 HOWTO (R_NIOS2_U16, /* type */
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 16, /* bitsize */
769 FALSE, /* pc_relative */
770 16, /* bitpos */
771 complain_overflow_unsigned, /* complain on overflow */
772 bfd_elf_generic_reloc, /* special function */
773 "R_NIOS2_U16", /* name */
774 FALSE, /* partial_inplace */
775 0xffff0000, /* src_mask */
776 0xffff0000, /* dest_mask */
777 FALSE), /* pcrel_offset */
778
779 HOWTO (R_NIOS2_PCREL16, /* type */
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 16, /* bitsize */
783 TRUE, /* pc_relative */
784 16, /* bitpos */
785 complain_overflow_signed, /* complain on overflow */
786 nios2_elf32_pcrel16_relocate, /* special function */
787 "R_NIOS2_PCREL16", /* name */
788 FALSE, /* partial_inplace */
789 0xffff0000, /* src_mask */
790 0xffff0000, /* dest_mask */
791 TRUE), /* pcrel_offset */
792
793 HOWTO (R_NIOS2_CALL26, /* type */
794 2, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 26, /* bitsize */
797 FALSE, /* pc_relative */
798 6, /* bitpos */
799 complain_overflow_dont, /* complain on overflow */
800 nios2_elf32_call26_relocate, /* special function */
801 "R_NIOS2_CALL26", /* name */
802 FALSE, /* partial_inplace */
803 0xffffffc0, /* src_mask */
804 0xffffffc0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 HOWTO (R_NIOS2_IMM5,
808 0,
809 2,
810 5,
811 FALSE,
812 21,
813 complain_overflow_bitfield,
814 bfd_elf_generic_reloc,
815 "R_NIOS2_IMM5",
816 FALSE,
817 0x03e00000,
818 0x03e00000,
819 FALSE),
820
821 HOWTO (R_NIOS2_CACHE_OPX,
822 0,
823 2,
824 5,
825 FALSE,
826 11,
827 complain_overflow_bitfield,
828 bfd_elf_generic_reloc,
829 "R_NIOS2_CACHE_OPX",
830 FALSE,
831 0x0000f800,
832 0x0000f800,
833 FALSE),
834
835 HOWTO (R_NIOS2_IMM6,
836 0,
837 2,
838 6,
839 FALSE,
840 26,
841 complain_overflow_bitfield,
842 bfd_elf_generic_reloc,
843 "R_NIOS2_IMM6",
844 FALSE,
845 0xfc000000,
846 0xfc000000,
847 FALSE),
848
849 HOWTO (R_NIOS2_IMM8,
850 0,
851 2,
852 8,
853 FALSE,
854 24,
855 complain_overflow_bitfield,
856 bfd_elf_generic_reloc,
857 "R_NIOS2_IMM8",
858 FALSE,
859 0xff000000,
860 0xff000000,
861 FALSE),
862
863 HOWTO (R_NIOS2_HI16,
864 0,
865 2,
866 32,
867 FALSE,
868 16,
869 complain_overflow_dont,
870 nios2_elf32_hi16_relocate,
871 "R_NIOS2_HI16",
872 FALSE,
873 0xffff0000,
874 0xffff0000,
875 FALSE),
876
877 HOWTO (R_NIOS2_LO16,
878 0,
879 2,
880 32,
881 FALSE,
882 16,
883 complain_overflow_dont,
884 nios2_elf32_lo16_relocate,
885 "R_NIOS2_LO16",
886 FALSE,
887 0xffff0000,
888 0xffff0000,
889 FALSE),
890
891 HOWTO (R_NIOS2_HIADJ16,
892 0,
893 2,
894 32,
895 FALSE,
896 16,
897 complain_overflow_dont,
898 nios2_elf32_hiadj16_relocate,
899 "R_NIOS2_HIADJ16",
900 FALSE,
901 0xffff0000,
902 0xffff0000,
903 FALSE),
904
905 HOWTO (R_NIOS2_BFD_RELOC_32,
906 0,
907 2, /* long */
908 32,
909 FALSE,
910 0,
911 complain_overflow_dont,
912 bfd_elf_generic_reloc,
913 "R_NIOS2_BFD_RELOC32",
914 FALSE,
915 0xffffffff,
916 0xffffffff,
917 FALSE),
918
919 HOWTO (R_NIOS2_BFD_RELOC_16,
920 0,
921 1, /* short */
922 16,
923 FALSE,
924 0,
925 complain_overflow_bitfield,
926 bfd_elf_generic_reloc,
927 "R_NIOS2_BFD_RELOC16",
928 FALSE,
929 0x0000ffff,
930 0x0000ffff,
931 FALSE),
932
933 HOWTO (R_NIOS2_BFD_RELOC_8,
934 0,
935 0, /* byte */
936 8,
937 FALSE,
938 0,
939 complain_overflow_bitfield,
940 bfd_elf_generic_reloc,
941 "R_NIOS2_BFD_RELOC8",
942 FALSE,
943 0x000000ff,
944 0x000000ff,
945 FALSE),
946
947 HOWTO (R_NIOS2_GPREL,
948 0,
949 2,
950 32,
951 FALSE,
952 16,
953 complain_overflow_dont,
954 nios2_elf32_gprel_relocate,
955 "R_NIOS2_GPREL",
956 FALSE,
957 0xffff0000,
958 0xffff0000,
959 FALSE),
960
961 HOWTO (R_NIOS2_GNU_VTINHERIT,
962 0,
963 2, /* short */
964 0,
965 FALSE,
966 0,
967 complain_overflow_dont,
968 NULL,
969 "R_NIOS2_GNU_VTINHERIT",
970 FALSE,
971 0,
972 0,
973 FALSE),
974
975 HOWTO (R_NIOS2_GNU_VTENTRY,
976 0,
977 2, /* byte */
978 0,
979 FALSE,
980 0,
981 complain_overflow_dont,
982 _bfd_elf_rel_vtable_reloc_fn,
983 "R_NIOS2_GNU_VTENTRY",
984 FALSE,
985 0,
986 0,
987 FALSE),
988
989 HOWTO (R_NIOS2_UJMP,
990 0,
991 2,
992 32,
993 FALSE,
994 16,
995 complain_overflow_dont,
996 nios2_elf32_ujmp_relocate,
997 "R_NIOS2_UJMP",
998 FALSE,
999 0xffff0000,
1000 0xffff0000,
1001 FALSE),
1002
1003 HOWTO (R_NIOS2_CJMP,
1004 0,
1005 2,
1006 32,
1007 FALSE,
1008 16,
1009 complain_overflow_dont,
1010 nios2_elf32_cjmp_relocate,
1011 "R_NIOS2_CJMP",
1012 FALSE,
1013 0xffff0000,
1014 0xffff0000,
1015 FALSE),
1016
1017 HOWTO (R_NIOS2_CALLR,
1018 0,
1019 2,
1020 32,
1021 FALSE,
1022 16,
1023 complain_overflow_dont,
1024 nios2_elf32_callr_relocate,
1025 "R_NIOS2_CALLR",
1026 FALSE,
1027 0xffff0000,
1028 0xffff0000,
1029 FALSE),
1030
1031 HOWTO (R_NIOS2_ALIGN,
1032 0,
1033 2,
1034 0,
1035 FALSE,
1036 0,
1037 complain_overflow_dont,
1038 nios2_elf32_ignore_reloc,
1039 "R_NIOS2_ALIGN",
1040 FALSE,
1041 0,
1042 0,
1043 TRUE),
1044
1045 HOWTO (R_NIOS2_GOT16,
1046 0,
1047 2,
1048 16,
1049 FALSE,
1050 16,
1051 complain_overflow_bitfield,
1052 bfd_elf_generic_reloc,
1053 "R_NIOS2_GOT16",
1054 FALSE,
1055 0xffff0000,
1056 0xffff0000,
1057 FALSE),
1058
1059 HOWTO (R_NIOS2_CALL16,
1060 0,
1061 2,
1062 16,
1063 FALSE,
1064 16,
1065 complain_overflow_bitfield,
1066 bfd_elf_generic_reloc,
1067 "R_NIOS2_CALL16",
1068 FALSE,
1069 0xffff0000,
1070 0xffff0000,
1071 FALSE),
1072
1073 HOWTO (R_NIOS2_GOTOFF_LO,
1074 0,
1075 2,
1076 16,
1077 FALSE,
1078 16,
1079 complain_overflow_dont,
1080 bfd_elf_generic_reloc,
1081 "R_NIOS2_GOTOFF_LO",
1082 FALSE,
1083 0xffff0000,
1084 0xffff0000,
1085 FALSE),
1086
1087 HOWTO (R_NIOS2_GOTOFF_HA,
1088 0,
1089 2,
1090 16,
1091 FALSE,
1092 16,
1093 complain_overflow_dont,
1094 bfd_elf_generic_reloc,
1095 "R_NIOS2_GOTOFF_HA",
1096 FALSE,
1097 0xffff0000,
1098 0xffff0000,
1099 FALSE),
1100
1101 HOWTO (R_NIOS2_PCREL_LO,
1102 0,
1103 2,
1104 16,
1105 TRUE,
1106 16,
1107 complain_overflow_dont,
1108 nios2_elf32_pcrel_lo16_relocate,
1109 "R_NIOS2_PCREL_LO",
1110 FALSE,
1111 0xffff0000,
1112 0xffff0000,
1113 TRUE),
1114
1115 HOWTO (R_NIOS2_PCREL_HA,
1116 0,
1117 2,
1118 16,
1119 FALSE, /* This is a PC-relative relocation, but we need to subtract
1120 PC ourselves before the HIADJ. */
1121 16,
1122 complain_overflow_dont,
1123 nios2_elf32_pcrel_hiadj16_relocate,
1124 "R_NIOS2_PCREL_HA",
1125 FALSE,
1126 0xffff0000,
1127 0xffff0000,
1128 TRUE),
1129
1130 HOWTO (R_NIOS2_TLS_GD16,
1131 0,
1132 2,
1133 16,
1134 FALSE,
1135 16,
1136 complain_overflow_bitfield,
1137 bfd_elf_generic_reloc,
1138 "R_NIOS2_TLS_GD16",
1139 FALSE,
1140 0xffff0000,
1141 0xffff0000,
1142 FALSE),
1143
1144 HOWTO (R_NIOS2_TLS_LDM16,
1145 0,
1146 2,
1147 16,
1148 FALSE,
1149 16,
1150 complain_overflow_bitfield,
1151 bfd_elf_generic_reloc,
1152 "R_NIOS2_TLS_LDM16",
1153 FALSE,
1154 0xffff0000,
1155 0xffff0000,
1156 FALSE),
1157
1158 HOWTO (R_NIOS2_TLS_LDO16,
1159 0,
1160 2,
1161 16,
1162 FALSE,
1163 16,
1164 complain_overflow_bitfield,
1165 bfd_elf_generic_reloc,
1166 "R_NIOS2_TLS_LDO16",
1167 FALSE,
1168 0xffff0000,
1169 0xffff0000,
1170 FALSE),
1171
1172 HOWTO (R_NIOS2_TLS_IE16,
1173 0,
1174 2,
1175 16,
1176 FALSE,
1177 16,
1178 complain_overflow_bitfield,
1179 bfd_elf_generic_reloc,
1180 "R_NIOS2_TLS_IE16",
1181 FALSE,
1182 0xffff0000,
1183 0xffff0000,
1184 FALSE),
1185
1186 HOWTO (R_NIOS2_TLS_LE16,
1187 0,
1188 2,
1189 16,
1190 FALSE,
1191 16,
1192 complain_overflow_bitfield,
1193 bfd_elf_generic_reloc,
1194 "R_NIOS2_TLS_LE16",
1195 FALSE,
1196 0xffff0000,
1197 0xffff0000,
1198 FALSE),
1199
1200 HOWTO (R_NIOS2_TLS_DTPMOD,
1201 0,
1202 2,
1203 32,
1204 FALSE,
1205 0,
1206 complain_overflow_dont,
1207 bfd_elf_generic_reloc,
1208 "R_NIOS2_TLS_DTPMOD",
1209 FALSE,
1210 0xffffffff,
1211 0xffffffff,
1212 FALSE),
1213
1214 HOWTO (R_NIOS2_TLS_DTPREL,
1215 0,
1216 2,
1217 32,
1218 FALSE,
1219 0,
1220 complain_overflow_dont,
1221 bfd_elf_generic_reloc,
1222 "R_NIOS2_TLS_DTPREL",
1223 FALSE,
1224 0xffffffff,
1225 0xffffffff,
1226 FALSE),
1227
1228 HOWTO (R_NIOS2_TLS_TPREL,
1229 0,
1230 2,
1231 32,
1232 FALSE,
1233 0,
1234 complain_overflow_dont,
1235 bfd_elf_generic_reloc,
1236 "R_NIOS2_TLS_TPREL",
1237 FALSE,
1238 0xffffffff,
1239 0xffffffff,
1240 FALSE),
1241
1242 HOWTO (R_NIOS2_COPY,
1243 0,
1244 2,
1245 32,
1246 FALSE,
1247 0,
1248 complain_overflow_dont,
1249 bfd_elf_generic_reloc,
1250 "R_NIOS2_COPY",
1251 FALSE,
1252 0,
1253 0,
1254 FALSE),
1255
1256 HOWTO (R_NIOS2_GLOB_DAT,
1257 0,
1258 2,
1259 32,
1260 FALSE,
1261 0,
1262 complain_overflow_dont,
1263 bfd_elf_generic_reloc,
1264 "R_NIOS2_GLOB_DAT",
1265 FALSE,
1266 0xffffffff,
1267 0xffffffff,
1268 FALSE),
1269
1270 HOWTO (R_NIOS2_JUMP_SLOT,
1271 0,
1272 2,
1273 32,
1274 FALSE,
1275 0,
1276 complain_overflow_dont,
1277 bfd_elf_generic_reloc,
1278 "R_NIOS2_JUMP_SLOT",
1279 FALSE,
1280 0xffffffff,
1281 0xffffffff,
1282 FALSE),
1283
1284 HOWTO (R_NIOS2_RELATIVE,
1285 0,
1286 2,
1287 32,
1288 FALSE,
1289 0,
1290 complain_overflow_dont,
1291 bfd_elf_generic_reloc,
1292 "R_NIOS2_RELATIVE",
1293 FALSE,
1294 0xffffffff,
1295 0xffffffff,
1296 FALSE),
1297
1298 HOWTO (R_NIOS2_GOTOFF,
1299 0,
1300 2,
1301 32,
1302 FALSE,
1303 0,
1304 complain_overflow_dont,
1305 bfd_elf_generic_reloc,
1306 "R_NIOS2_GOTOFF",
1307 FALSE,
1308 0xffffffff,
1309 0xffffffff,
1310 FALSE),
1311
1312 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
1313 2, /* rightshift */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1315 26, /* bitsize */
1316 FALSE, /* pc_relative */
1317 6, /* bitpos */
1318 complain_overflow_dont, /* complain on overflow */
1319 nios2_elf32_call26_relocate, /* special function */
1320 "R_NIOS2_CALL26_NOAT", /* name */
1321 FALSE, /* partial_inplace */
1322 0xffffffc0, /* src_mask */
1323 0xffffffc0, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1325
1326 HOWTO (R_NIOS2_GOT_LO,
1327 0,
1328 2,
1329 16,
1330 FALSE,
1331 16,
1332 complain_overflow_dont,
1333 bfd_elf_generic_reloc,
1334 "R_NIOS2_GOT_LO",
1335 FALSE,
1336 0xffff0000,
1337 0xffff0000,
1338 FALSE),
1339
1340 HOWTO (R_NIOS2_GOT_HA,
1341 0,
1342 2,
1343 16,
1344 FALSE,
1345 16,
1346 complain_overflow_dont,
1347 bfd_elf_generic_reloc,
1348 "R_NIOS2_GOT_HA",
1349 FALSE,
1350 0xffff0000,
1351 0xffff0000,
1352 FALSE),
1353
1354 HOWTO (R_NIOS2_CALL_LO,
1355 0,
1356 2,
1357 16,
1358 FALSE,
1359 16,
1360 complain_overflow_dont,
1361 bfd_elf_generic_reloc,
1362 "R_NIOS2_CALL_LO",
1363 FALSE,
1364 0xffff0000,
1365 0xffff0000,
1366 FALSE),
1367
1368 HOWTO (R_NIOS2_CALL_HA,
1369 0,
1370 2,
1371 16,
1372 FALSE,
1373 16,
1374 complain_overflow_dont,
1375 bfd_elf_generic_reloc,
1376 "R_NIOS2_CALL_HA",
1377 FALSE,
1378 0xffff0000,
1379 0xffff0000,
1380 FALSE),
1381
1382 HOWTO (R_NIOS2_R2_S12,
1383 0,
1384 2,
1385 12,
1386 FALSE,
1387 16,
1388 complain_overflow_signed,
1389 bfd_elf_generic_reloc,
1390 "R_NIOS2_R2_S12",
1391 FALSE,
1392 0x0fff0000,
1393 0x0fff0000,
1394 FALSE),
1395
1396 HOWTO (R_NIOS2_R2_I10_1_PCREL,
1397 1,
1398 1,
1399 10,
1400 TRUE,
1401 6,
1402 complain_overflow_signed,
1403 bfd_elf_generic_reloc, /* FIXME? */
1404 "R_NIOS2_R2_I10_1_PCREL",
1405 FALSE,
1406 0xffc0,
1407 0xffc0,
1408 TRUE),
1409
1410 HOWTO (R_NIOS2_R2_T1I7_1_PCREL,
1411 1,
1412 1,
1413 7,
1414 TRUE,
1415 9,
1416 complain_overflow_signed,
1417 bfd_elf_generic_reloc, /* FIXME? */
1418 "R_NIOS2_R2_T1I7_1_PCREL",
1419 FALSE,
1420 0xfe00,
1421 0xfe00,
1422 TRUE),
1b786873 1423
8c163c5a
SL		 1424 HOWTO (R_NIOS2_R2_T1I7_2,
1425 2,
1426 1,
1427 7,
1428 FALSE,
1429 9,
1430 complain_overflow_unsigned,
1431 bfd_elf_generic_reloc,
1432 "R_NIOS2_R2_T1I7_2",
1433 FALSE,
1434 0xfe00,
1435 0xfe00,
1436 FALSE),
1b786873 1437
8c163c5a
SL		 1438 HOWTO (R_NIOS2_R2_T2I4,
1439 0,
1440 1,
1441 4,
1442 FALSE,
1443 12,
1444 complain_overflow_unsigned,
1445 bfd_elf_generic_reloc,
1446 "R_NIOS2_R2_T2I4",
1447 FALSE,
1448 0xf000,
1449 0xf000,
1450 FALSE),
1451
1452 HOWTO (R_NIOS2_R2_T2I4_1,
1453 1,
1454 1,
1455 4,
1456 FALSE,
1457 12,
1458 complain_overflow_unsigned,
1459 bfd_elf_generic_reloc,
1460 "R_NIOS2_R2_T2I4_1",
1461 FALSE,
1462 0xf000,
1463 0xf000,
1464 FALSE),
1465
1466 HOWTO (R_NIOS2_R2_T2I4_2,
1467 2,
1468 1,
1469 4,
1470 FALSE,
1471 12,
1472 complain_overflow_unsigned,
1473 bfd_elf_generic_reloc,
1474 "R_NIOS2_R2_T2I4_2",
1475 FALSE,
1476 0xf000,
1477 0xf000,
1478 FALSE),
1479
1480 HOWTO (R_NIOS2_R2_X1I7_2,
1481 2,
1482 1,
1483 7,
1484 FALSE,
1485 6,
1486 complain_overflow_unsigned,
1487 bfd_elf_generic_reloc,
1488 "R_NIOS2_R2_X1I7_2",
1489 FALSE,
1490 0x1fc0,
1491 0x1fc0,
1492 FALSE),
1b786873 1493
8c163c5a
SL		 1494 HOWTO (R_NIOS2_R2_X2L5,
1495 0,
1496 1,
1497 5,
1498 FALSE,
1499 6,
1500 complain_overflow_unsigned,
1501 bfd_elf_generic_reloc,
1502 "R_NIOS2_R2_X2L5",
1503 FALSE,
1504 0x07c0,
1505 0x07c0,
1506 FALSE),
1b786873 1507
8c163c5a
SL		 1508 HOWTO (R_NIOS2_R2_F1I5_2,
1509 2,
1510 1,
1511 5,
1512 FALSE,
1513 6,
1514 complain_overflow_unsigned,
1515 bfd_elf_generic_reloc,
1516 "R_NIOS2_R2_F1L5_2",
1517 FALSE,
1518 0x07c0,
1519 0x07c0,
1520 FALSE),
1521
1522 HOWTO (R_NIOS2_R2_L5I4X1,
1523 2,
1524 1,
1525 4,
1526 FALSE,
1527 6,
1528 complain_overflow_unsigned,
1529 bfd_elf_generic_reloc,
1530 "R_NIOS2_R2_L5I4X1",
1531 FALSE,
1532 0x03c0,
1533 0x03c0,
1534 FALSE),
1535
1536 HOWTO (R_NIOS2_R2_T1X1I6,
1537 0,
1538 1,
1539 6,
1540 FALSE,
1541 9,
1542 complain_overflow_unsigned,
1543 bfd_elf_generic_reloc,
1544 "R_NIOS2_R2_T1X1I6",
1545 FALSE,
1546 0x7e00,
1547 0x7e00,
1548 FALSE),
1b786873 1549
8c163c5a
SL		 1550 HOWTO (R_NIOS2_R2_T1X1I6_2,
1551 2,
1552 2,
1553 6,
1554 FALSE,
1555 9,
1556 complain_overflow_unsigned,
1557 bfd_elf_generic_reloc,
1558 "R_NIOS2_R2_T1I1X6_2",
1559 FALSE,
1560 0x7e00,
1561 0x7e00,
1562 FALSE),
1b786873 1563
8c163c5a
SL		 1564/* Add other relocations here. */
1565};
1566
36591ba1
SL		 1567static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1];
1568
8c163c5a
SL		 1569
1570/* Return true if producing output for a R2 BFD. */
1571#define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2)
1572
36591ba1
SL		 1573/* Return the howto for relocation RTYPE. */
1574static reloc_howto_type *
8c163c5a 1575lookup_howto (unsigned int rtype, bfd *abfd)
36591ba1
SL		 1576{
1577 static int initialized = 0;
1578 int i;
8c163c5a
SL		 1579 /* R2 relocations are a superset of R1, so use that for the lookup
1580 table. */
1581 int r1_howto_tbl_size = (int) (sizeof (elf_nios2_r1_howto_table_rel)
1582 / sizeof (elf_nios2_r1_howto_table_rel[0]));
1583 int r2_howto_tbl_size = (int) (sizeof (elf_nios2_r2_howto_table_rel)
1584 / sizeof (elf_nios2_r2_howto_table_rel[0]));
36591ba1
SL		 1585
1586 if (!initialized)
1587 {
1588 initialized = 1;
1589 memset (elf_code_to_howto_index, 0xff,
1590 sizeof (elf_code_to_howto_index));
8c163c5a
SL		 1591 for (i = 0; i < r2_howto_tbl_size; i++)
1592 {
1593 elf_code_to_howto_index[elf_nios2_r2_howto_table_rel[i].type] = i;
1594 if (i < r1_howto_tbl_size)
1595 BFD_ASSERT (elf_nios2_r2_howto_table_rel[i].type
1596 == elf_nios2_r1_howto_table_rel[i].type);
1597 }
36591ba1
SL		 1598 }
1599
1600 BFD_ASSERT (rtype <= R_NIOS2_ILLEGAL);
1601 i = elf_code_to_howto_index[rtype];
8c163c5a
SL		 1602 if (BFD_IS_R2 (abfd))
1603 {
1604 if (i >= r2_howto_tbl_size)
1605 return 0;
1606 return elf_nios2_r2_howto_table_rel + i;
1607 }
1608 else
1609 {
1610 if (i >= r1_howto_tbl_size)
1611 return 0;
1612 return elf_nios2_r1_howto_table_rel + i;
1613 }
36591ba1
SL		 1614}
1615
1616/* Map for converting BFD reloc types to Nios II reloc types. */
1617struct elf_reloc_map
1618{
1619 bfd_reloc_code_real_type bfd_val;
1620 enum elf_nios2_reloc_type elf_val;
1621};
1622
1623static const struct elf_reloc_map nios2_reloc_map[] = {
0ba38529 1624 {BFD_RELOC_NONE, R_NIOS2_NONE},
36591ba1
SL		 1625 {BFD_RELOC_NIOS2_S16, R_NIOS2_S16},
1626 {BFD_RELOC_NIOS2_U16, R_NIOS2_U16},
1627 {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16},
1628 {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26},
1629 {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5},
1630 {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX},
1631 {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6},
1632 {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8},
1633 {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16},
1634 {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16},
1635 {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16},
1636 {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32},
1637 {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16},
1638 {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8},
1639 {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL},
1640 {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT},
1641 {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY},
1642 {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP},
1643 {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP},
1644 {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR},
1645 {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN},
1646 {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16},
1647 {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16},
1648 {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO},
1649 {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA},
1650 {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO},
1651 {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA},
1652 {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16},
1653 {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16},
1654 {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16},
1655 {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16},
1656 {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16},
1657 {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD},
1658 {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL},
1659 {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL},
1660 {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY},
1661 {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT},
1662 {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT},
1663 {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE},
78058a5e
SL		 1664 {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF},
1665 {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT},
1c2de463
SL		 1666 {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO},
1667 {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA},
1668 {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO},
1669 {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA},
8c163c5a
SL		 1670 {BFD_RELOC_NIOS2_R2_S12, R_NIOS2_R2_S12},
1671 {BFD_RELOC_NIOS2_R2_I10_1_PCREL, R_NIOS2_R2_I10_1_PCREL},
1672 {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL, R_NIOS2_R2_T1I7_1_PCREL},
1673 {BFD_RELOC_NIOS2_R2_T1I7_2, R_NIOS2_R2_T1I7_2},
1674 {BFD_RELOC_NIOS2_R2_T2I4, R_NIOS2_R2_T2I4},
1675 {BFD_RELOC_NIOS2_R2_T2I4_1, R_NIOS2_R2_T2I4_1},
1676 {BFD_RELOC_NIOS2_R2_T2I4_2, R_NIOS2_R2_T2I4_2},
1677 {BFD_RELOC_NIOS2_R2_X1I7_2, R_NIOS2_R2_X1I7_2},
1678 {BFD_RELOC_NIOS2_R2_X2L5, R_NIOS2_R2_X2L5},
1679 {BFD_RELOC_NIOS2_R2_F1I5_2, R_NIOS2_R2_F1I5_2},
1680 {BFD_RELOC_NIOS2_R2_L5I4X1, R_NIOS2_R2_L5I4X1},
1681 {BFD_RELOC_NIOS2_R2_T1X1I6, R_NIOS2_R2_T1X1I6},
1682 {BFD_RELOC_NIOS2_R2_T1X1I6_2, R_NIOS2_R2_T1X1I6_2},
78058a5e
SL		 1683};
1684
1685enum elf32_nios2_stub_type
1686{
1687 nios2_stub_call26_before,
1688 nios2_stub_call26_after,
1689 nios2_stub_none
1690};
1691
1692struct elf32_nios2_stub_hash_entry
1693{
1694 /* Base hash table entry structure. */
1695 struct bfd_hash_entry bh_root;
1696
1697 /* The stub section. */
1698 asection *stub_sec;
1699
1700 /* Offset within stub_sec of the beginning of this stub. */
1701 bfd_vma stub_offset;
1702
1703 /* Given the symbol's value and its section we can determine its final
1704 value when building the stubs (so the stub knows where to jump. */
1705 bfd_vma target_value;
1706 asection *target_section;
1707
1708 enum elf32_nios2_stub_type stub_type;
1709
1710 /* The symbol table entry, if any, that this was derived from. */
1711 struct elf32_nios2_link_hash_entry *hh;
1712
1713 /* And the reloc addend that this was derived from. */
1714 bfd_vma addend;
1715
1716 /* Where this stub is being called from, or, in the case of combined
1717 stub sections, the first input section in the group. */
1718 asection *id_sec;
36591ba1
SL		 1719};
1720
78058a5e
SL		 1721#define nios2_stub_hash_entry(ent) \
1722 ((struct elf32_nios2_stub_hash_entry *)(ent))
1723
1724#define nios2_stub_hash_lookup(table, string, create, copy) \
1725 ((struct elf32_nios2_stub_hash_entry *) \
1726 bfd_hash_lookup ((table), (string), (create), (copy)))
1727
1728
36591ba1
SL		 1729/* The Nios II linker needs to keep track of the number of relocs that it
1730 decides to copy as dynamic relocs in check_relocs for each symbol.
1731 This is so that it can later discard them if they are found to be
1732 unnecessary. We store the information in a field extending the
1733 regular ELF linker hash table. */
1734
1735struct elf32_nios2_dyn_relocs
1736{
1737 struct elf32_nios2_dyn_relocs *next;
1738
1739 /* The input section of the reloc. */
1740 asection *sec;
1741
1742 /* Total number of relocs copied for the input section. */
1743 bfd_size_type count;
1744
1745 /* Number of pc-relative relocs copied for the input section. */
1746 bfd_size_type pc_count;
1747};
1748
1749/* Nios II ELF linker hash entry. */
1750
1751struct elf32_nios2_link_hash_entry
1752{
1753 struct elf_link_hash_entry root;
1754
78058a5e
SL		 1755 /* A pointer to the most recently used stub hash entry against this
1756 symbol. */
1757 struct elf32_nios2_stub_hash_entry *hsh_cache;
1758
36591ba1
SL		 1759 /* Track dynamic relocs copied for this symbol. */
1760 struct elf32_nios2_dyn_relocs *dyn_relocs;
1761
1762#define GOT_UNKNOWN 0
1763#define GOT_NORMAL 1
1764#define GOT_TLS_GD 2
1765#define GOT_TLS_IE 4
1766 unsigned char tls_type;
1767
1768 /* We need to detect and take special action for symbols which are only
1769 referenced with %call() and not with %got(). Such symbols do not need
1770 a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
1771 linking will not work if the dynamic GOT reloc exists.
1772 To check for this condition efficiently, we compare got_types_used against
1c2de463
SL		 1773 CALL_USED, meaning
1774 (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED.
1775 */
1776#define GOT_USED 1
1777#define CALL_USED 2
36591ba1
SL		 1778 unsigned char got_types_used;
1779};
1780
1781#define elf32_nios2_hash_entry(ent) \
1782 ((struct elf32_nios2_link_hash_entry *) (ent))
1783
1784/* Get the Nios II elf linker hash table from a link_info structure. */
1785#define elf32_nios2_hash_table(info) \
1786 ((struct elf32_nios2_link_hash_table *) ((info)->hash))
1787
1788/* Nios II ELF linker hash table. */
1789struct elf32_nios2_link_hash_table
1790 {
1791 /* The main hash table. */
1792 struct elf_link_hash_table root;
1793
78058a5e
SL		 1794 /* The stub hash table. */
1795 struct bfd_hash_table bstab;
1796
1797 /* Linker stub bfd. */
1798 bfd *stub_bfd;
1799
1800 /* Linker call-backs. */
1801 asection * (*add_stub_section) (const char *, asection *, bfd_boolean);
1802 void (*layout_sections_again) (void);
1803
1804 /* Array to keep track of which stub sections have been created, and
1805 information on stub grouping. */
1806 struct map_stub
1807 {
1808 /* These are the section to which stubs in the group will be
1809 attached. */
1810 asection *first_sec, *last_sec;
1811 /* The stub sections. There might be stubs inserted either before
1812 or after the real section.*/
1813 asection *first_stub_sec, *last_stub_sec;
1814 } *stub_group;
1815
1816 /* Assorted information used by nios2_elf32_size_stubs. */
1817 unsigned int bfd_count;
7292b3ac 1818 unsigned int top_index;
78058a5e
SL		 1819 asection **input_list;
1820 Elf_Internal_Sym **all_local_syms;
1821
36591ba1 1822 /* Short-cuts to get to dynamic linker sections. */
36591ba1
SL		 1823 asection *sbss;
1824
82e91538
SL		 1825 /* GOT pointer symbol _gp_got. */
1826 struct elf_link_hash_entry *h_gp_got;
1827
36591ba1
SL		 1828 union {
1829 bfd_signed_vma refcount;
1830 bfd_vma offset;
1831 } tls_ldm_got;
1832
1833 /* Small local sym cache. */
1834 struct sym_cache sym_cache;
1835
1836 bfd_vma res_n_size;
1837 };
1838
1839struct nios2_elf32_obj_tdata
1840{
1841 struct elf_obj_tdata root;
1842
1843 /* tls_type for each local got entry. */
1844 char *local_got_tls_type;
1845
1846 /* TRUE if TLS GD relocs have been seen for this object. */
1847 bfd_boolean has_tlsgd;
1848};
1849
1850#define elf32_nios2_tdata(abfd) \
1851 ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any)
1852
1853#define elf32_nios2_local_got_tls_type(abfd) \
1854 (elf32_nios2_tdata (abfd)->local_got_tls_type)
1855
1856/* The name of the dynamic interpreter. This is put in the .interp
1857 section. */
1858#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1859
1860/* PLT implementation for position-dependent code. */
1861static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */
1862 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */
1863 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */
1864 0x7800683a /* jmp r15 */
1865};
1866
1867static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */
1868 0x03800034, /* movhi r14, %hiadj(res_0) */
1869 0x73800004, /* addi r14, r14, %lo(res_0) */
1870 0x7b9fc83a, /* sub r15, r15, r14 */
1871 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1872 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1873 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1874 0x6800683a /* jmp r13 */
1875};
1876
1877/* PLT implementation for position-independent code. */
1878static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */
1879 0x03c00034, /* movhi r15, %hiadj(index * 4) */
1880 0x7bc00004, /* addi r15, r15, %lo(index * 4) */
1881 0x00000006 /* br .PLTresolve */
1882};
1883
1884static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */
1885 0x001ce03a, /* nextpc r14 */
1886 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1887 0x6b9b883a, /* add r13, r13, r14 */
1888 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1889 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1890 0x6800683a /* jmp r13 */
1891};
1892
78058a5e
SL		 1893/* CALL26 stub. */
1894static const bfd_vma nios2_call26_stub_entry[] = {
1895 0x00400034, /* orhi at, r0, %hiadj(dest) */
1896 0x08400004, /* addi at, at, %lo(dest) */
1897 0x0800683a /* jmp at */
1898};
1899
1900/* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */
1901static void
1902nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value)
1903{
1904 bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset);
1905
83da6e74 1906 BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff);
78058a5e
SL		 1907
1908 bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6),
1909 sec->contents + offset);
1910}
1911
1912/* Install COUNT 32-bit values DATA starting at offset OFFSET into
1913 section SEC. */
1914static void
1915nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset,
1916 int count)
1917{
1918 while (count--)
1919 {
1920 bfd_put_32 (sec->owner, *data, sec->contents + offset);
1921 offset += 4;
1922 ++data;
1923 }
1924}
1925
1926/* The usual way of loading a 32-bit constant into a Nios II register is to
1927 load the high 16 bits in one instruction and then add the low 16 bits with
1928 a signed add. This means that the high halfword needs to be adjusted to
1929 compensate for the sign bit of the low halfword. This function returns the
1930 adjusted high halfword for a given 32-bit constant. */
1931static
1932bfd_vma hiadj (bfd_vma symbol_value)
1933{
1934 return ((symbol_value + 0x8000) >> 16) & 0xffff;
1935}
1936
36591ba1
SL		 1937/* Implement elf_backend_grok_prstatus:
1938 Support for core dump NOTE sections. */
1939static bfd_boolean
1940nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1941{
1942 int offset;
1943 size_t size;
1944
1945 switch (note->descsz)
1946 {
1947 default:
1948 return FALSE;
1949
1950 case 212: /* Linux/Nios II */
1951 /* pr_cursig */
228e534f 1952 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
36591ba1
SL		 1953
1954 /* pr_pid */
228e534f 1955 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24);
36591ba1
SL		 1956
1957 /* pr_reg */
1958 offset = 72;
1959 size = 136;
1960
1961 break;
1962 }
1963
1964 /* Make a ".reg/999" section. */
1965 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1966 size, note->descpos + offset);
1967}
1968
1969/* Implement elf_backend_grok_psinfo. */
1970static bfd_boolean
1971nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1972{
1973 switch (note->descsz)
1974 {
1975 default:
1976 return FALSE;
1977
1978 case 124: /* Linux/Nios II elf_prpsinfo */
228e534f 1979 elf_tdata (abfd)->core->program
36591ba1 1980 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 1981 elf_tdata (abfd)->core->command
36591ba1
SL		 1982 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1983 }
1984
1985 /* Note that for some reason, a spurious space is tacked
1986 onto the end of the args in some (at least one anyway)
1987 implementations, so strip it off if it exists. */
1988
1989 {
228e534f 1990 char *command = elf_tdata (abfd)->core->command;
36591ba1
SL		 1991 int n = strlen (command);
1992
1993 if (0 < n && command[n - 1] == ' ')
1994 command[n - 1] = '\0';
1995 }
1996
1997 return TRUE;
1998}
1999
78058a5e
SL		 2000/* Assorted hash table functions. */
2001
2002/* Initialize an entry in the stub hash table. */
2003static struct bfd_hash_entry *
2004stub_hash_newfunc (struct bfd_hash_entry *entry,
2005 struct bfd_hash_table *table,
2006 const char *string)
2007{
2008 /* Allocate the structure if it has not already been allocated by a
2009 subclass. */
2010 if (entry == NULL)
2011 {
2012 entry = bfd_hash_allocate (table,
2013 sizeof (struct elf32_nios2_stub_hash_entry));
2014 if (entry == NULL)
2015 return entry;
2016 }
2017
2018 /* Call the allocation method of the superclass. */
2019 entry = bfd_hash_newfunc (entry, table, string);
2020 if (entry != NULL)
2021 {
2022 struct elf32_nios2_stub_hash_entry *hsh;
2023
2024 /* Initialize the local fields. */
2025 hsh = (struct elf32_nios2_stub_hash_entry *) entry;
2026 hsh->stub_sec = NULL;
2027 hsh->stub_offset = 0;
2028 hsh->target_value = 0;
2029 hsh->target_section = NULL;
2030 hsh->stub_type = nios2_stub_none;
2031 hsh->hh = NULL;
2032 hsh->id_sec = NULL;
2033 }
2034
2035 return entry;
2036}
2037
36591ba1
SL		 2038/* Create an entry in a Nios II ELF linker hash table. */
2039static struct bfd_hash_entry *
2040link_hash_newfunc (struct bfd_hash_entry *entry,
2041 struct bfd_hash_table *table, const char *string)
2042{
2043 /* Allocate the structure if it has not already been allocated by a
2044 subclass. */
2045 if (entry == NULL)
2046 {
2047 entry = bfd_hash_allocate (table,
2048 sizeof (struct elf32_nios2_link_hash_entry));
2049 if (entry == NULL)
2050 return entry;
2051 }
2052
2053 /* Call the allocation method of the superclass. */
2054 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2055 if (entry)
2056 {
2057 struct elf32_nios2_link_hash_entry *eh;
2058
2059 eh = (struct elf32_nios2_link_hash_entry *) entry;
78058a5e 2060 eh->hsh_cache = NULL;
36591ba1
SL		 2061 eh->dyn_relocs = NULL;
2062 eh->tls_type = GOT_UNKNOWN;
2063 eh->got_types_used = 0;
2064 }
2065
2066 return entry;
2067}
2068
78058a5e
SL		 2069/* Section name for stubs is the associated section name plus this
2070 string. */
2071#define STUB_SUFFIX ".stub"
2072
2073/* Build a name for an entry in the stub hash table. */
2074static char *
2075nios2_stub_name (const asection *input_section,
2076 const asection *sym_sec,
2077 const struct elf32_nios2_link_hash_entry *hh,
2078 const Elf_Internal_Rela *rel,
2079 enum elf32_nios2_stub_type stub_type)
2080{
2081 char *stub_name;
2082 bfd_size_type len;
2083 char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a';
2084
2085 if (hh)
2086 {
2087 len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1;
2088 stub_name = bfd_malloc (len);
2089 if (stub_name != NULL)
2090 {
2091 sprintf (stub_name, "%08x_%c_%s+%x",
2092 input_section->id & 0xffffffff,
2093 stubpos,
2094 hh->root.root.root.string,
2095 (int) rel->r_addend & 0xffffffff);
2096 }
2097 }
2098 else
2099 {
2100 len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1;
2101 stub_name = bfd_malloc (len);
2102 if (stub_name != NULL)
2103 {
2104 sprintf (stub_name, "%08x_%c_%x:%x+%x",
2105 input_section->id & 0xffffffff,
2106 stubpos,
2107 sym_sec->id & 0xffffffff,
2108 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
2109 (int) rel->r_addend & 0xffffffff);
2110 }
2111 }
2112 return stub_name;
2113}
2114
2115/* Look up an entry in the stub hash. Stub entries are cached because
2116 creating the stub name takes a bit of time. */
2117static struct elf32_nios2_stub_hash_entry *
2118nios2_get_stub_entry (const asection *input_section,
2119 const asection *sym_sec,
2120 struct elf32_nios2_link_hash_entry *hh,
2121 const Elf_Internal_Rela *rel,
2122 struct elf32_nios2_link_hash_table *htab,
2123 enum elf32_nios2_stub_type stub_type)
2124{
2125 struct elf32_nios2_stub_hash_entry *hsh;
2126 const asection *id_sec;
2127
2128 /* If this input section is part of a group of sections sharing one
2129 stub section, then use the id of the first/last section in the group,
2130 depending on the stub section placement relative to the group.
2131 Stub names need to include a section id, as there may well be
2132 more than one stub used to reach say, printf, and we need to
2133 distinguish between them. */
2134 if (stub_type == nios2_stub_call26_before)
2135 id_sec = htab->stub_group[input_section->id].first_sec;
2136 else
2137 id_sec = htab->stub_group[input_section->id].last_sec;
2138
2139 if (hh != NULL && hh->hsh_cache != NULL
2140 && hh->hsh_cache->hh == hh
2141 && hh->hsh_cache->id_sec == id_sec
2142 && hh->hsh_cache->stub_type == stub_type)
2143 {
2144 hsh = hh->hsh_cache;
2145 }
2146 else
2147 {
2148 char *stub_name;
2149
2150 stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type);
2151 if (stub_name == NULL)
2152 return NULL;
2153
2154 hsh = nios2_stub_hash_lookup (&htab->bstab,
2155 stub_name, FALSE, FALSE);
2156
2157 if (hh != NULL)
2158 hh->hsh_cache = hsh;
2159
2160 free (stub_name);
2161 }
2162
2163 return hsh;
2164}
2165
2166/* Add a new stub entry to the stub hash. Not all fields of the new
2167 stub entry are initialised. */
2168static struct elf32_nios2_stub_hash_entry *
2169nios2_add_stub (const char *stub_name,
2170 asection *section,
2171 struct elf32_nios2_link_hash_table *htab,
2172 enum elf32_nios2_stub_type stub_type)
2173{
2174 asection *link_sec;
2175 asection *stub_sec;
2176 asection **secptr, **linkptr;
2177 struct elf32_nios2_stub_hash_entry *hsh;
2178 bfd_boolean afterp;
2179
2180 if (stub_type == nios2_stub_call26_before)
2181 {
2182 link_sec = htab->stub_group[section->id].first_sec;
2183 secptr = &(htab->stub_group[section->id].first_stub_sec);
2184 linkptr = &(htab->stub_group[link_sec->id].first_stub_sec);
2185 afterp = FALSE;
2186 }
2187 else
2188 {
2189 link_sec = htab->stub_group[section->id].last_sec;
2190 secptr = &(htab->stub_group[section->id].last_stub_sec);
2191 linkptr = &(htab->stub_group[link_sec->id].last_stub_sec);
2192 afterp = TRUE;
2193 }
2194 stub_sec = *secptr;
2195 if (stub_sec == NULL)
2196 {
2197 stub_sec = *linkptr;
2198 if (stub_sec == NULL)
2199 {
2200 size_t namelen;
2201 bfd_size_type len;
2202 char *s_name;
2203
2204 namelen = strlen (link_sec->name);
2205 len = namelen + sizeof (STUB_SUFFIX);
2206 s_name = bfd_alloc (htab->stub_bfd, len);
2207 if (s_name == NULL)
2208 return NULL;
2209
2210 memcpy (s_name, link_sec->name, namelen);
2211 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2212
2213 stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp);
2214 if (stub_sec == NULL)
2215 return NULL;
2216 *linkptr = stub_sec;
2217 }
2218 *secptr = stub_sec;
2219 }
2220
2221 /* Enter this entry into the linker stub hash table. */
2222 hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name,
2223 TRUE, FALSE);
2224 if (hsh == NULL)
2225 {
695344c0 2226 /* xgettext:c-format */
4eca0228
AM		 2227 _bfd_error_handler (_("%B: cannot create stub entry %s"),
2228 section->owner,
2229 stub_name);
78058a5e
SL		 2230 return NULL;
2231 }
2232
2233 hsh->stub_sec = stub_sec;
2234 hsh->stub_offset = 0;
2235 hsh->id_sec = link_sec;
2236 return hsh;
2237}
2238
2239/* Set up various things so that we can make a list of input sections
2240 for each output section included in the link. Returns -1 on error,
2241 0 when no stubs will be needed, and 1 on success. */
2242int
2243nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
2244{
2245 bfd *input_bfd;
2246 unsigned int bfd_count;
7292b3ac 2247 unsigned int top_id, top_index;
78058a5e
SL		 2248 asection *section;
2249 asection **input_list, **list;
2250 bfd_size_type amt;
2251 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2252
2253 /* Count the number of input BFDs and find the top input section id. */
2254 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2255 input_bfd != NULL;
c72f2fb2 2256 input_bfd = input_bfd->link.next)
78058a5e
SL		 2257 {
2258 bfd_count += 1;
2259 for (section = input_bfd->sections;
2260 section != NULL;
2261 section = section->next)
2262 {
2263 if (top_id < section->id)
2264 top_id = section->id;
2265 }
2266 }
2267
2268 htab->bfd_count = bfd_count;
2269
2270 amt = sizeof (struct map_stub) * (top_id + 1);
2271 htab->stub_group = bfd_zmalloc (amt);
2272 if (htab->stub_group == NULL)
2273 return -1;
2274
2275 /* We can't use output_bfd->section_count here to find the top output
2276 section index as some sections may have been removed, and
2277 strip_excluded_output_sections doesn't renumber the indices. */
2278 for (section = output_bfd->sections, top_index = 0;
2279 section != NULL;
2280 section = section->next)
2281 {
2282 if (top_index < section->index)
2283 top_index = section->index;
2284 }
2285
2286 htab->top_index = top_index;
2287 amt = sizeof (asection *) * (top_index + 1);
2288 input_list = bfd_malloc (amt);
2289 htab->input_list = input_list;
2290 if (input_list == NULL)
2291 return -1;
2292
2293 /* For sections we aren't interested in, mark their entries with a
2294 value we can check later. */
2295 list = input_list + top_index;
2296 do
2297 *list = bfd_abs_section_ptr;
2298 while (list-- != input_list);
2299
2300 for (section = output_bfd->sections;
2301 section != NULL;
2302 section = section->next)
2303 {
2304 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
2305 * have PC relative relocs in them but no code flag set. */
2306 if (((section->flags & SEC_CODE) != 0) ||
2307 strcmp(".ctors", section->name) ||
2308 strcmp(".dtors", section->name))
2309 input_list[section->index] = NULL;
2310 }
2311
2312 return 1;
2313}
2314
2315/* The linker repeatedly calls this function for each input section,
2316 in the order that input sections are linked into output sections.
2317 Build lists of input sections to determine groupings between which
2318 we may insert linker stubs. */
2319void
2320nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec)
2321{
2322 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2323
2324 if (isec->output_section->index <= htab->top_index)
2325 {
2326 asection **list = htab->input_list + isec->output_section->index;
2327 if (*list != bfd_abs_section_ptr)
2328 {
2329 /* Steal the last_sec pointer for our list.
2330 This happens to make the list in reverse order,
2331 which is what we want. */
2332 htab->stub_group[isec->id].last_sec = *list;
2333 *list = isec;
2334 }
2335 }
2336}
2337
2338/* Segment mask for CALL26 relocation relaxation. */
2339#define CALL26_SEGMENT(x) ((x) & 0xf0000000)
2340
2341/* Fudge factor for approximate maximum size of all stubs that might
2342 be inserted by the linker. This does not actually limit the number
2343 of stubs that might be inserted, and only affects strategy for grouping
2344 and placement of stubs. Perhaps this should be computed based on number
2345 of relocations seen, or be specifiable on the command line. */
2346#define MAX_STUB_SECTION_SIZE 0xffff
2347
2348/* See whether we can group stub sections together. Grouping stub
2349 sections may result in fewer stubs. More importantly, we need to
2350 put all .init* and .fini* stubs at the end of the .init or
2351 .fini output sections respectively, because glibc splits the
2352 _init and _fini functions into multiple parts. Putting a stub in
2353 the middle of a function is not a good idea.
2354 Rather than computing groups of a maximum fixed size, for Nios II
2355 CALL26 relaxation it makes more sense to compute the groups based on
2356 sections that fit within a 256MB address segment. Also do not allow
2357 a group to span more than one output section, since different output
2358 sections might correspond to different memory banks on a bare-metal
2359 target, etc. */
2360static void
2361group_sections (struct elf32_nios2_link_hash_table *htab)
2362{
2363 asection **list = htab->input_list + htab->top_index;
2364 do
2365 {
2366 /* The list is in reverse order so we'll search backwards looking
2367 for the first section that begins in the same memory segment,
2368 marking sections along the way to point at the tail for this
2369 group. */
2370 asection *tail = *list;
2371 if (tail == bfd_abs_section_ptr)
2372 continue;
2373 while (tail != NULL)
2374 {
2375 bfd_vma start = tail->output_section->vma + tail->output_offset;
2376 bfd_vma end = start + tail->size;
2377 bfd_vma segment = CALL26_SEGMENT (end);
2378 asection *prev;
2379
2380 if (segment != CALL26_SEGMENT (start)
2381 || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE))
2382 /* This section spans more than one memory segment, or is
2383 close enough to the end of the segment that adding stub
2384 sections before it might cause it to move so that it
2385 spans memory segments, or that stubs added at the end of
2386 this group might overflow into the next memory segment.
2387 Put it in a group by itself to localize the effects. */
2388 {
2389 prev = htab->stub_group[tail->id].last_sec;
2390 htab->stub_group[tail->id].last_sec = tail;
2391 htab->stub_group[tail->id].first_sec = tail;
2392 }
2393 else
2394 /* Collect more sections for this group. */
2395 {
2396 asection *curr, *first;
2397 for (curr = tail; ; curr = prev)
2398 {
2399 prev = htab->stub_group[curr->id].last_sec;
2400 if (!prev
2401 || tail->output_section != prev->output_section
2402 || (CALL26_SEGMENT (prev->output_section->vma
2403 + prev->output_offset)
2404 != segment))
2405 break;
2406 }
2407 first = curr;
2408 for (curr = tail; ; curr = prev)
2409 {
2410 prev = htab->stub_group[curr->id].last_sec;
2411 htab->stub_group[curr->id].last_sec = tail;
2412 htab->stub_group[curr->id].first_sec = first;
2413 if (curr == first)
2414 break;
2415 }
2416 }
2417
2418 /* Reset tail for the next group. */
2419 tail = prev;
2420 }
2421 }
2422 while (list-- != htab->input_list);
2423 free (htab->input_list);
2424}
2425
2426/* Determine the type of stub needed, if any, for a call. */
2427static enum elf32_nios2_stub_type
2428nios2_type_of_stub (asection *input_sec,
2429 const Elf_Internal_Rela *rel,
2430 struct elf32_nios2_link_hash_entry *hh,
2431 struct elf32_nios2_link_hash_table *htab,
2432 bfd_vma destination,
2433 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2434{
2435 bfd_vma location, segment, start, end;
2436 asection *s0, *s1, *s;
2437
2438 if (hh != NULL &&
2439 !(hh->root.root.type == bfd_link_hash_defined
2440 || hh->root.root.type == bfd_link_hash_defweak))
2441 return nios2_stub_none;
2442
2443 /* Determine where the call point is. */
2444 location = (input_sec->output_section->vma
2445 + input_sec->output_offset + rel->r_offset);
2446 segment = CALL26_SEGMENT (location);
2447
2448 /* Nios II CALL and JMPI instructions can transfer control to addresses
2449 within the same 256MB segment as the PC. */
2450 if (segment == CALL26_SEGMENT (destination))
2451 return nios2_stub_none;
2452
2453 /* Find the start and end addresses of the stub group. Also account for
2454 any already-created stub sections for this group. Note that for stubs
2455 in the end section, only the first instruction of the last stub
2456 (12 bytes long) needs to be within range. */
2457 s0 = htab->stub_group[input_sec->id].first_sec;
2458 s = htab->stub_group[s0->id].first_stub_sec;
2459 if (s != NULL && s->size > 0)
2460 start = s->output_section->vma + s->output_offset;
2461 else
2462 start = s0->output_section->vma + s0->output_offset;
2463
2464 s1 = htab->stub_group[input_sec->id].last_sec;
2465 s = htab->stub_group[s1->id].last_stub_sec;
2466 if (s != NULL && s->size > 0)
2467 end = s->output_section->vma + s->output_offset + s->size - 8;
2468 else
2469 end = s1->output_section->vma + s1->output_offset + s1->size;
2470
2471 BFD_ASSERT (start < end);
2472 BFD_ASSERT (start <= location);
2473 BFD_ASSERT (location < end);
2474
2475 /* Put stubs at the end of the group unless that is not a valid
2476 location and the beginning of the group is. It might be that
2477 neither the beginning nor end works if we have an input section
2478 so large that it spans multiple segment boundaries. In that
2479 case, punt; the end result will be a relocation overflow error no
2480 matter what we do here.
2481
2482 Note that adding stubs pushes up the addresses of all subsequent
2483 sections, so that stubs allocated on one pass through the
2484 relaxation loop may not be valid on the next pass. (E.g., we may
2485 allocate a stub at the beginning of the section on one pass and
2486 find that the call site has been bumped into the next memory
2487 segment on the next pass.) The important thing to note is that
2488 we never try to reclaim the space allocated to such unused stubs,
2489 so code size and section addresses can only increase with each
2490 iteration. Accounting for the start and end addresses of the
2491 already-created stub sections ensures that when the algorithm
2492 converges, it converges accurately, with the entire appropriate
2493 stub section accessible from the call site and not just the
2494 address at the start or end of the stub group proper. */
2495
2496 if (segment == CALL26_SEGMENT (end))
2497 return nios2_stub_call26_after;
2498 else if (segment == CALL26_SEGMENT (start))
2499 return nios2_stub_call26_before;
2500 else
2501 /* Perhaps this should be a dedicated error code. */
2502 return nios2_stub_none;
2503}
2504
2505static bfd_boolean
2506nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2507{
2508 struct elf32_nios2_stub_hash_entry *hsh
2509 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2510 asection *stub_sec = hsh->stub_sec;
2511 bfd_vma sym_value;
2512
2513 /* Make a note of the offset within the stubs for this entry. */
2514 hsh->stub_offset = stub_sec->size;
2515
2516 switch (hsh->stub_type)
2517 {
2518 case nios2_stub_call26_before:
2519 case nios2_stub_call26_after:
2520 /* A call26 stub looks like:
2521 orhi at, %hiadj(dest)
2522 addi at, at, %lo(dest)
2523 jmp at
2524 Note that call/jmpi instructions can't be used in PIC code
2525 so there is no reason for the stub to be PIC, either. */
2526 sym_value = (hsh->target_value
2527 + hsh->target_section->output_offset
2528 + hsh->target_section->output_section->vma
2529 + hsh->addend);
2530
2531 nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry,
2532 hsh->stub_offset, 3);
2533 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset,
2534 hiadj (sym_value));
2535 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4,
2536 (sym_value & 0xffff));
2537 stub_sec->size += 12;
2538 break;
2539 default:
2540 BFD_FAIL ();
2541 return FALSE;
2542 }
2543
2544 return TRUE;
2545}
2546
2547/* As above, but don't actually build the stub. Just bump offset so
2548 we know stub section sizes. */
2549static bfd_boolean
2550nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2551{
2552 struct elf32_nios2_stub_hash_entry *hsh
2553 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2554
2555 switch (hsh->stub_type)
2556 {
2557 case nios2_stub_call26_before:
2558 case nios2_stub_call26_after:
2559 hsh->stub_sec->size += 12;
2560 break;
2561 default:
2562 BFD_FAIL ();
2563 return FALSE;
2564 }
2565 return TRUE;
2566}
2567
2568/* Read in all local syms for all input bfds.
2569 Returns -1 on error, 0 otherwise. */
2570
2571static int
2572get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
2573 struct bfd_link_info *info)
2574{
2575 unsigned int bfd_indx;
2576 Elf_Internal_Sym *local_syms, **all_local_syms;
2577 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2578
2579 /* We want to read in symbol extension records only once. To do this
2580 we need to read in the local symbols in parallel and save them for
2581 later use; so hold pointers to the local symbols in an array. */
2582 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
2583 all_local_syms = bfd_zmalloc (amt);
2584 htab->all_local_syms = all_local_syms;
2585 if (all_local_syms == NULL)
2586 return -1;
2587
2588 /* Walk over all the input BFDs, swapping in local symbols. */
2589 for (bfd_indx = 0;
2590 input_bfd != NULL;
c72f2fb2 2591 input_bfd = input_bfd->link.next, bfd_indx++)
78058a5e
SL		 2592 {
2593 Elf_Internal_Shdr *symtab_hdr;
2594
2595 /* We'll need the symbol table in a second. */
2596 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2597 if (symtab_hdr->sh_info == 0)
2598 continue;
2599
2600 /* We need an array of the local symbols attached to the input bfd. */
2601 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
2602 if (local_syms == NULL)
2603 {
2604 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2605 symtab_hdr->sh_info, 0,
2606 NULL, NULL, NULL);
2607 /* Cache them for elf_link_input_bfd. */
2608 symtab_hdr->contents = (unsigned char *) local_syms;
2609 }
2610 if (local_syms == NULL)
2611 return -1;
2612
2613 all_local_syms[bfd_indx] = local_syms;
2614 }
2615
2616 return 0;
2617}
2618
2619/* Determine and set the size of the stub section for a final link. */
2620bfd_boolean
2621nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd,
2622 struct bfd_link_info *info,
2623 asection *(*add_stub_section) (const char *,
2624 asection *, bfd_boolean),
2625 void (*layout_sections_again) (void))
2626{
2627 bfd_boolean stub_changed = FALSE;
2628 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2629
2630 /* Stash our params away. */
2631 htab->stub_bfd = stub_bfd;
2632 htab->add_stub_section = add_stub_section;
2633 htab->layout_sections_again = layout_sections_again;
2634
2635 /* FIXME: We only compute the section groups once. This could cause
2636 problems if adding a large stub section causes following sections,
2637 or parts of them, to move into another segment. However, this seems
2638 to be consistent with the way other back ends handle this.... */
2639 group_sections (htab);
2640
2641 if (get_local_syms (output_bfd, info->input_bfds, info))
2642 {
2643 if (htab->all_local_syms)
2644 goto error_ret_free_local;
2645 return FALSE;
2646 }
2647
2648 while (1)
2649 {
2650 bfd *input_bfd;
2651 unsigned int bfd_indx;
2652 asection *stub_sec;
2653
2654 for (input_bfd = info->input_bfds, bfd_indx = 0;
2655 input_bfd != NULL;
c72f2fb2 2656 input_bfd = input_bfd->link.next, bfd_indx++)
78058a5e
SL		 2657 {
2658 Elf_Internal_Shdr *symtab_hdr;
2659 asection *section;
2660 Elf_Internal_Sym *local_syms;
2661
2662 /* We'll need the symbol table in a second. */
2663 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2664 if (symtab_hdr->sh_info == 0)
2665 continue;
2666
2667 local_syms = htab->all_local_syms[bfd_indx];
2668
2669 /* Walk over each section attached to the input bfd. */
2670 for (section = input_bfd->sections;
2671 section != NULL;
2672 section = section->next)
2673 {
2674 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2675
2676 /* If there aren't any relocs, then there's nothing more
2677 to do. */
2678 if ((section->flags & SEC_RELOC) == 0
2679 || section->reloc_count == 0)
2680 continue;
2681
2682 /* If this section is a link-once section that will be
2683 discarded, then don't create any stubs. */
2684 if (section->output_section == NULL
2685 || section->output_section->owner != output_bfd)
2686 continue;
2687
2688 /* Get the relocs. */
2689 internal_relocs
2690 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
2691 info->keep_memory);
2692 if (internal_relocs == NULL)
2693 goto error_ret_free_local;
2694
2695 /* Now examine each relocation. */
2696 irela = internal_relocs;
2697 irelaend = irela + section->reloc_count;
2698 for (; irela < irelaend; irela++)
2699 {
2700 unsigned int r_type, r_indx;
2701 enum elf32_nios2_stub_type stub_type;
2702 struct elf32_nios2_stub_hash_entry *hsh;
2703 asection *sym_sec;
2704 bfd_vma sym_value;
2705 bfd_vma destination;
2706 struct elf32_nios2_link_hash_entry *hh;
2707 char *stub_name;
2708 const asection *id_sec;
2709
2710 r_type = ELF32_R_TYPE (irela->r_info);
2711 r_indx = ELF32_R_SYM (irela->r_info);
2712
2713 if (r_type >= (unsigned int) R_NIOS2_ILLEGAL)
2714 {
2715 bfd_set_error (bfd_error_bad_value);
2716 error_ret_free_internal:
2717 if (elf_section_data (section)->relocs == NULL)
2718 free (internal_relocs);
2719 goto error_ret_free_local;
2720 }
2721
2722 /* Only look for stubs on CALL and JMPI instructions. */
2723 if (r_type != (unsigned int) R_NIOS2_CALL26)
2724 continue;
2725
2726 /* Now determine the call target, its name, value,
2727 section. */
2728 sym_sec = NULL;
2729 sym_value = 0;
2730 destination = 0;
2731 hh = NULL;
2732 if (r_indx < symtab_hdr->sh_info)
2733 {
2734 /* It's a local symbol. */
2735 Elf_Internal_Sym *sym;
2736 Elf_Internal_Shdr *hdr;
2737 unsigned int shndx;
2738
2739 sym = local_syms + r_indx;
2740 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2741 sym_value = sym->st_value;
2742 shndx = sym->st_shndx;
2743 if (shndx < elf_numsections (input_bfd))
2744 {
2745 hdr = elf_elfsections (input_bfd)[shndx];
2746 sym_sec = hdr->bfd_section;
2747 destination = (sym_value + irela->r_addend
2748 + sym_sec->output_offset
2749 + sym_sec->output_section->vma);
2750 }
2751 }
2752 else
2753 {
2754 /* It's an external symbol. */
2755 int e_indx;
2756
2757 e_indx = r_indx - symtab_hdr->sh_info;
2758 hh = ((struct elf32_nios2_link_hash_entry *)
2759 elf_sym_hashes (input_bfd)[e_indx]);
2760
2761 while (hh->root.root.type == bfd_link_hash_indirect
2762 || hh->root.root.type == bfd_link_hash_warning)
2763 hh = ((struct elf32_nios2_link_hash_entry *)
2764 hh->root.root.u.i.link);
2765
2766 if (hh->root.root.type == bfd_link_hash_defined
2767 || hh->root.root.type == bfd_link_hash_defweak)
2768 {
2769 sym_sec = hh->root.root.u.def.section;
2770 sym_value = hh->root.root.u.def.value;
2771
2772 if (sym_sec->output_section != NULL)
2773 destination = (sym_value + irela->r_addend
2774 + sym_sec->output_offset
2775 + sym_sec->output_section->vma);
2776 else
2777 continue;
2778 }
2779 else if (hh->root.root.type == bfd_link_hash_undefweak)
2780 {
0e1862bb 2781 if (! bfd_link_pic (info))
78058a5e
SL		 2782 continue;
2783 }
2784 else if (hh->root.root.type == bfd_link_hash_undefined)
2785 {
2786 if (! (info->unresolved_syms_in_objects == RM_IGNORE
2787 && (ELF_ST_VISIBILITY (hh->root.other)
2788 == STV_DEFAULT)))
2789 continue;
2790 }
2791 else
2792 {
2793 bfd_set_error (bfd_error_bad_value);
2794 goto error_ret_free_internal;
2795 }
2796 }
2797
2798 /* Determine what (if any) linker stub is needed. */
2799 stub_type = nios2_type_of_stub (section, irela, hh, htab,
2800 destination, info);
2801 if (stub_type == nios2_stub_none)
2802 continue;
2803
2804 /* Support for grouping stub sections. */
2805 if (stub_type == nios2_stub_call26_before)
2806 id_sec = htab->stub_group[section->id].first_sec;
2807 else
2808 id_sec = htab->stub_group[section->id].last_sec;
2809
2810 /* Get the name of this stub. */
2811 stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela,
2812 stub_type);
2813 if (!stub_name)
2814 goto error_ret_free_internal;
2815
2816 hsh = nios2_stub_hash_lookup (&htab->bstab,
2817 stub_name,
2818 FALSE, FALSE);
2819 if (hsh != NULL)
2820 {
2821 /* The proper stub has already been created. */
2822 free (stub_name);
2823 continue;
2824 }
2825
2826 hsh = nios2_add_stub (stub_name, section, htab, stub_type);
2827 if (hsh == NULL)
2828 {
2829 free (stub_name);
2830 goto error_ret_free_internal;
2831 }
2832 hsh->target_value = sym_value;
2833 hsh->target_section = sym_sec;
2834 hsh->stub_type = stub_type;
2835 hsh->hh = hh;
2836 hsh->addend = irela->r_addend;
2837 stub_changed = TRUE;
2838 }
2839
2840 /* We're done with the internal relocs, free them. */
2841 if (elf_section_data (section)->relocs == NULL)
2842 free (internal_relocs);
2843 }
2844 }
2845
2846 if (!stub_changed)
2847 break;
2848
2849 /* OK, we've added some stubs. Find out the new size of the
2850 stub sections. */
2851 for (stub_sec = htab->stub_bfd->sections;
2852 stub_sec != NULL;
2853 stub_sec = stub_sec->next)
2854 stub_sec->size = 0;
2855
2856 bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab);
2857
2858 /* Ask the linker to do its stuff. */
2859 (*htab->layout_sections_again) ();
2860 stub_changed = FALSE;
2861 }
2862
2863 free (htab->all_local_syms);
2864 return TRUE;
2865
2866 error_ret_free_local:
2867 free (htab->all_local_syms);
2868 return FALSE;
2869}
2870
2871/* Build all the stubs associated with the current output file. The
2872 stubs are kept in a hash table attached to the main linker hash
2873 table. This function is called via nios2elf_finish in the linker. */
2874bfd_boolean
2875nios2_elf32_build_stubs (struct bfd_link_info *info)
2876{
2877 asection *stub_sec;
2878 struct bfd_hash_table *table;
2879 struct elf32_nios2_link_hash_table *htab;
2880
2881 htab = elf32_nios2_hash_table (info);
2882
2883 for (stub_sec = htab->stub_bfd->sections;
2884 stub_sec != NULL;
2885 stub_sec = stub_sec->next)
1511baec
SL		 2886 /* The stub_bfd may contain non-stub sections if it is also the
2887 dynobj. Any such non-stub sections are created with the
2888 SEC_LINKER_CREATED flag set, while stub sections do not
2889 have that flag. Ignore any non-stub sections here. */
2890 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
1b786873 2891 {
1511baec
SL		 2892 bfd_size_type size;
2893
2894 /* Allocate memory to hold the linker stubs. */
2895 size = stub_sec->size;
2896 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
2897 if (stub_sec->contents == NULL && size != 0)
2898 return FALSE;
2899 stub_sec->size = 0;
2900 }
78058a5e
SL		 2901
2902 /* Build the stubs as directed by the stub hash table. */
2903 table = &htab->bstab;
2904 bfd_hash_traverse (table, nios2_build_one_stub, info);
2905
2906 return TRUE;
2907}
2908
2909
965b1d80
SL		 2910#define is_nios2_elf(bfd) \
2911 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2912 && elf_object_id (bfd) == NIOS2_ELF_DATA)
2913
2914/* Merge backend specific data from an object file to the output
2915 object file when linking. */
2916
2917static bfd_boolean
50e03d47 2918nios2_elf32_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
965b1d80 2919{
50e03d47 2920 bfd *obfd = info->output_bfd;
965b1d80
SL		 2921 flagword old_flags;
2922 flagword new_flags;
2923
2924 if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd))
2925 return TRUE;
2926
2927 /* Check if we have the same endianness. */
50e03d47 2928 if (! _bfd_generic_verify_endian_match (ibfd, info))
965b1d80
SL		 2929 return FALSE;
2930
2931 new_flags = elf_elfheader (ibfd)->e_flags;
2932 old_flags = elf_elfheader (obfd)->e_flags;
2933 if (!elf_flags_init (obfd))
2934 {
2935 /* First call, no flags set. */
2936 elf_flags_init (obfd) = TRUE;
2937 elf_elfheader (obfd)->e_flags = new_flags;
2938
2939 switch (new_flags)
2940 {
2941 default:
2942 case EF_NIOS2_ARCH_R1:
2943 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1);
2944 break;
2945 case EF_NIOS2_ARCH_R2:
2946 if (bfd_big_endian (ibfd))
2947 {
4eca0228 2948 _bfd_error_handler
965b1d80
SL		 2949 (_("error: %B: Big-endian R2 is not supported."), ibfd);
2950 bfd_set_error (bfd_error_bad_value);
2951 return FALSE;
2952 }
2953 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2);
2954 break;
2955 }
2956 }
2957
2958 /* Incompatible flags. */
2959 else if (new_flags != old_flags)
2960 {
2961 /* So far, the only incompatible flags denote incompatible
2962 architectures. */
4eca0228 2963 _bfd_error_handler
695344c0 2964 /* xgettext:c-format */
965b1d80
SL		 2965 (_("error: %B: Conflicting CPU architectures %d/%d"),
2966 ibfd, new_flags, old_flags);
2967 bfd_set_error (bfd_error_bad_value);
2968 return FALSE;
2969 }
2970
2971 /* Merge Tag_compatibility attributes and any common GNU ones. */
50e03d47 2972 _bfd_elf_merge_object_attributes (ibfd, info);
965b1d80
SL		 2973
2974 return TRUE;
2975}
2976
2977
36591ba1
SL		 2978/* Implement bfd_elf32_bfd_reloc_type_lookup:
2979 Given a BFD reloc type, return a howto structure. */
2980static reloc_howto_type *
8c163c5a 2981nios2_elf32_bfd_reloc_type_lookup (bfd *abfd,
36591ba1
SL		 2982 bfd_reloc_code_real_type code)
2983{
2984 int i;
1b786873 2985
36591ba1
SL		 2986 for (i = 0;
2987 i < (int) (sizeof (nios2_reloc_map) / sizeof (struct elf_reloc_map));
2988 ++i)
2989 if (nios2_reloc_map[i].bfd_val == code)
8c163c5a 2990 return lookup_howto (nios2_reloc_map[i].elf_val, abfd);
36591ba1
SL		 2991 return NULL;
2992}
2993
2994/* Implement bfd_elf32_bfd_reloc_name_lookup:
2995 Given a reloc name, return a howto structure. */
2996static reloc_howto_type *
8c163c5a 2997nios2_elf32_bfd_reloc_name_lookup (bfd *abfd,
36591ba1
SL		 2998 const char *r_name)
2999{
8c163c5a
SL		 3000 int i;
3001 reloc_howto_type *howto_tbl;
3002 int howto_tbl_size;
36591ba1 3003
8c163c5a
SL		 3004 if (BFD_IS_R2 (abfd))
3005 {
3006 howto_tbl = elf_nios2_r2_howto_table_rel;
3007 howto_tbl_size = (int) (sizeof (elf_nios2_r2_howto_table_rel)
3008 / sizeof (elf_nios2_r2_howto_table_rel[0]));
3009 }
3010 else
3011 {
3012 howto_tbl = elf_nios2_r1_howto_table_rel;
3013 howto_tbl_size = (int) (sizeof (elf_nios2_r1_howto_table_rel)
3014 / sizeof (elf_nios2_r1_howto_table_rel[0]));
3015 }
1b786873 3016
8c163c5a
SL		 3017 for (i = 0; i < howto_tbl_size; i++)
3018 if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0)
3019 return howto_tbl + i;
1b786873 3020 return NULL;
36591ba1
SL		 3021}
3022
3023/* Implement elf_info_to_howto:
3024 Given a ELF32 relocation, fill in a arelent structure. */
3025static void
8c163c5a 3026nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr,
36591ba1
SL		 3027 Elf_Internal_Rela *dst)
3028{
3029 unsigned int r_type;
3030
3031 r_type = ELF32_R_TYPE (dst->r_info);
8c163c5a 3032 cache_ptr->howto = lookup_howto (r_type, abfd);
36591ba1
SL		 3033}
3034
3035/* Return the base VMA address which should be subtracted from real addresses
3036 when resolving @dtpoff relocation.
3037 This is PT_TLS segment p_vaddr. */
3038static bfd_vma
3039dtpoff_base (struct bfd_link_info *info)
3040{
3041 /* If tls_sec is NULL, we should have signalled an error already. */
3042 if (elf_hash_table (info)->tls_sec == NULL)
3043 return 0;
3044 return elf_hash_table (info)->tls_sec->vma;
3045}
3046
3047/* Return the relocation value for @tpoff relocation
3048 if STT_TLS virtual address is ADDRESS. */
3049static bfd_vma
3050tpoff (struct bfd_link_info *info, bfd_vma address)
3051{
3052 struct elf_link_hash_table *htab = elf_hash_table (info);
3053
3054 /* If tls_sec is NULL, we should have signalled an error already. */
3055 if (htab->tls_sec == NULL)
3056 return 0;
3057 return address - htab->tls_sec->vma;
3058}
3059
3060/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
3061 dangerous relocation. */
3062static bfd_boolean
3063nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info)
3064{
3065
3066 bfd_boolean gp_found;
3067 struct bfd_hash_entry *h;
3068 struct bfd_link_hash_entry *lh;
3069
3070 /* If we've already figured out what GP will be, just return it. */
3071 *pgp = _bfd_get_gp_value (output_bfd);
3072 if (*pgp)
3073 return TRUE;
3074
3075 h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE);
3076 lh = (struct bfd_link_hash_entry *) h;
3077lookup:
3078 if (lh)
3079 {
3080 switch (lh->type)
3081 {
3082 case bfd_link_hash_undefined:
3083 case bfd_link_hash_undefweak:
3084 case bfd_link_hash_common:
3085 gp_found = FALSE;
3086 break;
3087 case bfd_link_hash_defined:
3088 case bfd_link_hash_defweak:
3089 gp_found = TRUE;
a7be2893
SL		 3090 {
3091 asection *sym_sec = lh->u.def.section;
3092 bfd_vma sym_value = lh->u.def.value;
3093
3094 if (sym_sec->output_section)
3095 sym_value = (sym_value + sym_sec->output_offset
3096 + sym_sec->output_section->vma);
3097 *pgp = sym_value;
3098 }
36591ba1
SL		 3099 break;
3100 case bfd_link_hash_indirect:
3101 case bfd_link_hash_warning:
3102 lh = lh->u.i.link;
3103 /* @@FIXME ignoring warning for now */
3104 goto lookup;
3105 case bfd_link_hash_new:
3106 default:
3107 abort ();
3108 }
3109 }
3110 else
3111 gp_found = FALSE;
3112
3113 if (!gp_found)
3114 {
3115 /* Only get the error once. */
3116 *pgp = 4;
3117 _bfd_set_gp_value (output_bfd, *pgp);
3118 return FALSE;
3119 }
3120
3121 _bfd_set_gp_value (output_bfd, *pgp);
3122
3123 return TRUE;
3124}
3125
3126/* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous
3127 if it's not available as we don't have a link_info pointer available here
3128 to look it up in the output symbol table. We don't need to adjust the
3129 symbol value for an external symbol if we are producing relocatable
3130 output. */
3131static bfd_reloc_status_type
1b786873 3132nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
36591ba1
SL		 3133 char **error_message, bfd_vma *pgp)
3134{
3135 if (bfd_is_und_section (symbol->section) && !relocatable)
3136 {
3137 *pgp = 0;
3138 return bfd_reloc_undefined;
3139 }
3140
3141 *pgp = _bfd_get_gp_value (output_bfd);
3142 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
3143 {
3144 if (relocatable)
3145 {
3146 /* Make up a value. */
3147 *pgp = symbol->section->output_section->vma + 0x4000;
3148 _bfd_set_gp_value (output_bfd, *pgp);
3149 }
3150 else
3151 {
3152 *error_message
3153 = (char *) _("global pointer relative relocation when _gp not defined");
3154 return bfd_reloc_dangerous;
3155 }
3156 }
3157
3158 return bfd_reloc_ok;
3159}
3160
36591ba1
SL		 3161/* Do the relocations that require special handling. */
3162static bfd_reloc_status_type
1b786873 3163nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3164 asection *input_section,
1b786873 3165 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3166 bfd_vma symbol_value, bfd_vma addend)
3167{
3168 symbol_value = symbol_value + addend;
3169 addend = 0;
3170 symbol_value = (symbol_value >> 16) & 0xffff;
3171 return _bfd_final_link_relocate (howto, abfd, input_section,
3172 data, offset, symbol_value, addend);
3173}
3174
3175static bfd_reloc_status_type
3176nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3177 asection *input_section,
1b786873 3178 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3179 bfd_vma symbol_value, bfd_vma addend)
3180{
3181 symbol_value = symbol_value + addend;
3182 addend = 0;
3183 symbol_value = symbol_value & 0xffff;
3184 return _bfd_final_link_relocate (howto, abfd, input_section,
3185 data, offset, symbol_value, addend);
3186}
3187
3188static bfd_reloc_status_type
3189nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3190 asection *input_section,
36591ba1
SL		 3191 bfd_byte *data, bfd_vma offset,
3192 bfd_vma symbol_value, bfd_vma addend)
3193{
3194 symbol_value = symbol_value + addend;
3195 addend = 0;
3196 symbol_value = hiadj(symbol_value);
3197 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3198 symbol_value, addend);
3199}
3200
3201static bfd_reloc_status_type
3202nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3203 asection *input_section,
36591ba1
SL		 3204 bfd_byte *data, bfd_vma offset,
3205 bfd_vma symbol_value, bfd_vma addend)
3206{
3207 symbol_value = symbol_value + addend;
3208 addend = 0;
3209 symbol_value = symbol_value & 0xffff;
3210 return _bfd_final_link_relocate (howto, abfd, input_section,
3211 data, offset, symbol_value, addend);
3212}
3213
3214static bfd_reloc_status_type
3215nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3216 asection *input_section,
36591ba1
SL		 3217 bfd_byte *data, bfd_vma offset,
3218 bfd_vma symbol_value, bfd_vma addend)
3219{
3220 symbol_value = symbol_value + addend;
3221 symbol_value -= (input_section->output_section->vma
3222 + input_section->output_offset);
3223 symbol_value -= offset;
3224 addend = 0;
3225 symbol_value = hiadj(symbol_value);
3226 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3227 symbol_value, addend);
3228}
3229
3230static bfd_reloc_status_type
3231nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3232 asection *input_section,
1b786873 3233 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3234 bfd_vma symbol_value, bfd_vma addend)
3235{
1b786873 3236 /* NIOS2 pc relative relocations are relative to the next 32-bit instruction
36591ba1
SL		 3237 so we need to subtract 4 before doing a final_link_relocate. */
3238 symbol_value = symbol_value + addend - 4;
3239 addend = 0;
3240 return _bfd_final_link_relocate (howto, abfd, input_section,
3241 data, offset, symbol_value, addend);
3242}
3243
3244static bfd_reloc_status_type
3245nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3246 asection *input_section,
1b786873 3247 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3248 bfd_vma symbol_value, bfd_vma addend)
3249{
3250 /* Check that the relocation is in the same page as the current address. */
1b786873 3251 if (CALL26_SEGMENT (symbol_value + addend)
78058a5e
SL		 3252 != CALL26_SEGMENT (input_section->output_section->vma
3253 + input_section->output_offset
3254 + offset))
36591ba1
SL		 3255 return bfd_reloc_overflow;
3256
8c163c5a
SL		 3257 /* Check that the target address is correctly aligned on a 4-byte
3258 boundary. */
3259 if ((symbol_value + addend) & 0x3)
3260 return bfd_reloc_overflow;
3261
36591ba1
SL		 3262 return _bfd_final_link_relocate (howto, abfd, input_section,
3263 data, offset, symbol_value, addend);
3264}
3265
3266static bfd_reloc_status_type
3267nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3268 asection *input_section,
1b786873 3269 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3270 bfd_vma symbol_value, bfd_vma addend)
3271{
3272 /* Because we need the output_bfd, the special handling is done
3273 in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */
3274 return _bfd_final_link_relocate (howto, abfd, input_section,
3275 data, offset, symbol_value, addend);
3276}
3277
3278static bfd_reloc_status_type
3279nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3280 asection *input_section,
1b786873 3281 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3282 bfd_vma symbol_value, bfd_vma addend)
3283{
3284 bfd_vma symbol_lo16, symbol_hi16;
3285 bfd_reloc_status_type r;
3286 symbol_value = symbol_value + addend;
3287 addend = 0;
3288 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3289 symbol_lo16 = symbol_value & 0xffff;
3290
3291 r = _bfd_final_link_relocate (howto, abfd, input_section,
3292 data, offset, symbol_hi16, addend);
3293
3294 if (r == bfd_reloc_ok)
3295 return _bfd_final_link_relocate (howto, abfd, input_section,
3296 data, offset + 4, symbol_lo16, addend);
3297
3298 return r;
3299}
3300
3301static bfd_reloc_status_type
3302nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3303 asection *input_section,
1b786873 3304 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3305 bfd_vma symbol_value, bfd_vma addend)
3306{
3307 bfd_vma symbol_lo16, symbol_hi16;
3308 bfd_reloc_status_type r;
3309 symbol_value = symbol_value + addend;
3310 addend = 0;
3311 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3312 symbol_lo16 = symbol_value & 0xffff;
3313
3314 r = _bfd_final_link_relocate (howto, abfd, input_section,
3315 data, offset, symbol_hi16, addend);
3316
3317 if (r == bfd_reloc_ok)
3318 return _bfd_final_link_relocate (howto, abfd, input_section,
3319 data, offset + 4, symbol_lo16, addend);
3320
3321 return r;
3322}
3323
3324static bfd_reloc_status_type
3325nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3326 asection *input_section,
1b786873 3327 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3328 bfd_vma symbol_value, bfd_vma addend)
3329{
3330 bfd_vma symbol_lo16, symbol_hi16;
3331 bfd_reloc_status_type r;
3332 symbol_value = symbol_value + addend;
3333 addend = 0;
3334 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3335 symbol_lo16 = symbol_value & 0xffff;
3336
3337 r = _bfd_final_link_relocate (howto, abfd, input_section,
3338 data, offset, symbol_hi16, addend);
3339
3340 if (r == bfd_reloc_ok)
3341 return _bfd_final_link_relocate (howto, abfd, input_section,
3342 data, offset + 4, symbol_lo16, addend);
3343
3344 return r;
3345}
3346
3347/* HOWTO handlers for relocations that require special handling. */
3348
3349/* This is for relocations used only when relaxing to ensure
3350 changes in size of section don't screw up .align. */
3351static bfd_reloc_status_type
3352nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
1b786873
L		 3353 asymbol *symbol ATTRIBUTE_UNUSED,
3354 void *data ATTRIBUTE_UNUSED, asection *input_section,
3355 bfd *output_bfd,
36591ba1
SL		 3356 char **error_message ATTRIBUTE_UNUSED)
3357{
3358 if (output_bfd != NULL)
3359 reloc_entry->address += input_section->output_offset;
3360 return bfd_reloc_ok;
3361}
3362
3363static bfd_reloc_status_type
1b786873
L		 3364nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3365 void *data, asection *input_section,
3366 bfd *output_bfd,
36591ba1
SL		 3367 char **error_message ATTRIBUTE_UNUSED)
3368{
3369 /* This part is from bfd_elf_generic_reloc. */
3370 if (output_bfd != NULL
3371 && (symbol->flags & BSF_SECTION_SYM) == 0
3372 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3373 {
3374 reloc_entry->address += input_section->output_offset;
3375 return bfd_reloc_ok;
3376 }
3377
3378 if (output_bfd != NULL)
3379 /* FIXME: See bfd_perform_relocation. Is this right? */
3380 return bfd_reloc_continue;
3381
3382 return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto,
3383 input_section,
3384 data, reloc_entry->address,
3385 (symbol->value
3386 + symbol->section->output_section->vma
3387 + symbol->section->output_offset),
3388 reloc_entry->addend);
3389}
3390
3391static bfd_reloc_status_type
3392nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3393 void *data, asection *input_section,
3394 bfd *output_bfd,
36591ba1
SL		 3395 char **error_message ATTRIBUTE_UNUSED)
3396{
3397 /* This part is from bfd_elf_generic_reloc. */
3398 if (output_bfd != NULL
3399 && (symbol->flags & BSF_SECTION_SYM) == 0
3400 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3401 {
3402 reloc_entry->address += input_section->output_offset;
3403 return bfd_reloc_ok;
3404 }
3405
3406 if (output_bfd != NULL)
3407 /* FIXME: See bfd_perform_relocation. Is this right? */
3408 return bfd_reloc_continue;
3409
3410 return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto,
3411 input_section,
3412 data, reloc_entry->address,
3413 (symbol->value
3414 + symbol->section->output_section->vma
3415 + symbol->section->output_offset),
3416 reloc_entry->addend);
3417}
3418
3419static bfd_reloc_status_type
3420nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3421 void *data, asection *input_section,
3422 bfd *output_bfd,
36591ba1
SL		 3423 char **error_message ATTRIBUTE_UNUSED)
3424{
3425 /* This part is from bfd_elf_generic_reloc. */
3426 if (output_bfd != NULL
3427 && (symbol->flags & BSF_SECTION_SYM) == 0
3428 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3429 {
3430 reloc_entry->address += input_section->output_offset;
3431 return bfd_reloc_ok;
3432 }
3433
3434 if (output_bfd != NULL)
3435 /* FIXME: See bfd_perform_relocation. Is this right? */
3436 return bfd_reloc_continue;
3437
3438 return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto,
3439 input_section,
3440 data, reloc_entry->address,
3441 (symbol->value
3442 + symbol->section->output_section->vma
3443 + symbol->section->output_offset),
3444 reloc_entry->addend);
3445}
3446
3447static bfd_reloc_status_type
3448nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry,
3449 asymbol *symbol, void *data,
3450 asection *input_section, bfd *output_bfd,
3451 char **error_message ATTRIBUTE_UNUSED)
3452{
3453 /* This part is from bfd_elf_generic_reloc. */
3454 if (output_bfd != NULL
3455 && (symbol->flags & BSF_SECTION_SYM) == 0
3456 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3457 {
3458 reloc_entry->address += input_section->output_offset;
3459 return bfd_reloc_ok;
3460 }
3461
3462 if (output_bfd != NULL)
3463 /* FIXME: See bfd_perform_relocation. Is this right? */
3464 return bfd_reloc_continue;
3465
3466 return nios2_elf32_do_pcrel_lo16_relocate (
3467 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3468 (symbol->value + symbol->section->output_section->vma
3469 + symbol->section->output_offset),
3470 reloc_entry->addend);
3471}
3472
3473static bfd_reloc_status_type
3474nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry,
3475 asymbol *symbol, void *data,
3476 asection *input_section, bfd *output_bfd,
3477 char **error_message ATTRIBUTE_UNUSED)
3478{
3479 /* This part is from bfd_elf_generic_reloc. */
3480 if (output_bfd != NULL
3481 && (symbol->flags & BSF_SECTION_SYM) == 0
3482 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3483 {
3484 reloc_entry->address += input_section->output_offset;
3485 return bfd_reloc_ok;
3486 }
3487
3488 if (output_bfd != NULL)
3489 /* FIXME: See bfd_perform_relocation. Is this right? */
3490 return bfd_reloc_continue;
3491
3492 return nios2_elf32_do_pcrel_hiadj16_relocate (
3493 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3494 (symbol->value + symbol->section->output_section->vma
3495 + symbol->section->output_offset),
3496 reloc_entry->addend);
3497}
3498
3499static bfd_reloc_status_type
3500nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3501 void *data, asection *input_section,
3502 bfd *output_bfd,
36591ba1
SL		 3503 char **error_message ATTRIBUTE_UNUSED)
3504{
3505 /* This part is from bfd_elf_generic_reloc. */
3506 if (output_bfd != NULL
3507 && (symbol->flags & BSF_SECTION_SYM) == 0
3508 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3509 {
3510 reloc_entry->address += input_section->output_offset;
3511 return bfd_reloc_ok;
3512 }
3513
3514 if (output_bfd != NULL)
3515 /* FIXME: See bfd_perform_relocation. Is this right? */
3516 return bfd_reloc_continue;
3517
3518 return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto,
3519 input_section,
3520 data, reloc_entry->address,
3521 (symbol->value
3522 + symbol->section->output_section->vma
3523 + symbol->section->output_offset),
3524 reloc_entry->addend);
3525}
3526
3527static bfd_reloc_status_type
3528nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3529 void *data, asection *input_section,
3530 bfd *output_bfd,
36591ba1
SL		 3531 char **error_message ATTRIBUTE_UNUSED)
3532{
3533 /* This part is from bfd_elf_generic_reloc. */
3534 if (output_bfd != NULL
3535 && (symbol->flags & BSF_SECTION_SYM) == 0
3536 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3537 {
3538 reloc_entry->address += input_section->output_offset;
3539 return bfd_reloc_ok;
3540 }
3541
3542 if (output_bfd != NULL)
3543 /* FIXME: See bfd_perform_relocation. Is this right? */
3544 return bfd_reloc_continue;
3545
3546 return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto,
3547 input_section,
3548 data, reloc_entry->address,
3549 (symbol->value
3550 + symbol->section->output_section->vma
3551 + symbol->section->output_offset),
3552 reloc_entry->addend);
3553}
3554
3555static bfd_reloc_status_type
3556nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3557 void *data, asection *input_section,
36591ba1
SL		 3558 bfd *output_bfd, char **msg)
3559{
3560 bfd_vma relocation;
3561 bfd_vma gp;
3562 bfd_reloc_status_type r;
3563
3564
3565 /* This part is from bfd_elf_generic_reloc. */
3566 if (output_bfd != NULL
3567 && (symbol->flags & BSF_SECTION_SYM) == 0
3568 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3569 {
3570 reloc_entry->address += input_section->output_offset;
3571 return bfd_reloc_ok;
3572 }
3573
3574 if (output_bfd != NULL)
3575 /* FIXME: See bfd_perform_relocation. Is this right? */
3576 return bfd_reloc_continue;
3577
3578 relocation = (symbol->value
3579 + symbol->section->output_section->vma
3580 + symbol->section->output_offset);
3581
3582 /* This assumes we've already cached the _gp symbol. */
3583 r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp);
3584 if (r == bfd_reloc_ok)
3585 {
3586 relocation = relocation + reloc_entry->addend - gp;
3587 reloc_entry->addend = 0;
3588 if ((signed) relocation < -32768 || (signed) relocation > 32767)
3589 {
3590 *msg = _("global pointer relative address out of range");
3591 r = bfd_reloc_outofrange;
3592 }
3593 else
3594 r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto,
3595 input_section,
3596 data, reloc_entry->address,
3597 relocation, reloc_entry->addend);
3598 }
3599
3600 return r;
3601}
3602
3603static bfd_reloc_status_type
3604nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3605 void *data, asection *input_section,
36591ba1
SL		 3606 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3607{
3608 /* This part is from bfd_elf_generic_reloc. */
3609 if (output_bfd != NULL
3610 && (symbol->flags & BSF_SECTION_SYM) == 0
3611 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3612 {
3613 reloc_entry->address += input_section->output_offset;
3614 return bfd_reloc_ok;
3615 }
3616
3617 if (output_bfd != NULL)
3618 /* FIXME: See bfd_perform_relocation. Is this right? */
3619 return bfd_reloc_continue;
3620
3621 return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto,
3622 input_section,
3623 data, reloc_entry->address,
3624 (symbol->value
3625 + symbol->section->output_section->vma
3626 + symbol->section->output_offset),
3627 reloc_entry->addend);
3628}
3629
3630static bfd_reloc_status_type
3631nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3632 void *data, asection *input_section,
36591ba1
SL		 3633 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3634{
3635 /* This part is from bfd_elf_generic_reloc. */
3636 if (output_bfd != NULL
3637 && (symbol->flags & BSF_SECTION_SYM) == 0
3638 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3639 {
3640 reloc_entry->address += input_section->output_offset;
3641 return bfd_reloc_ok;
3642 }
3643
3644 if (output_bfd != NULL)
3645 /* FIXME: See bfd_perform_relocation. Is this right? */
3646 return bfd_reloc_continue;
3647
3648 return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto,
3649 input_section,
3650 data, reloc_entry->address,
3651 (symbol->value
3652 + symbol->section->output_section->vma
3653 + symbol->section->output_offset),
3654 reloc_entry->addend);
3655}
3656
3657static bfd_reloc_status_type
3658nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3659 void *data, asection *input_section,
36591ba1
SL		 3660 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3661{
3662 /* This part is from bfd_elf_generic_reloc. */
3663 if (output_bfd != NULL
3664 && (symbol->flags & BSF_SECTION_SYM) == 0
3665 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3666 {
3667 reloc_entry->address += input_section->output_offset;
3668 return bfd_reloc_ok;
3669 }
3670
3671 if (output_bfd != NULL)
3672 /* FIXME: See bfd_perform_relocation. Is this right? */
3673 return bfd_reloc_continue;
3674
3675 return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto,
3676 input_section,
3677 data, reloc_entry->address,
3678 (symbol->value
3679 + symbol->section->output_section->vma
3680 + symbol->section->output_offset),
3681 reloc_entry->addend);
3682}
3683
1b786873 3684
36591ba1
SL		 3685/* Implement elf_backend_relocate_section. */
3686static bfd_boolean
3687nios2_elf32_relocate_section (bfd *output_bfd,
3688 struct bfd_link_info *info,
3689 bfd *input_bfd,
3690 asection *input_section,
3691 bfd_byte *contents,
3692 Elf_Internal_Rela *relocs,
3693 Elf_Internal_Sym *local_syms,
3694 asection **local_sections)
3695{
3696 Elf_Internal_Shdr *symtab_hdr;
3697 struct elf_link_hash_entry **sym_hashes;
3698 Elf_Internal_Rela *rel;
3699 Elf_Internal_Rela *relend;
3700 struct elf32_nios2_link_hash_table *htab;
3701 asection *sgot;
3702 asection *splt;
3703 asection *sreloc = NULL;
3704 bfd_vma *local_got_offsets;
82e91538 3705 bfd_vma got_base;
36591ba1
SL		 3706
3707 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3708 sym_hashes = elf_sym_hashes (input_bfd);
3709 relend = relocs + input_section->reloc_count;
3710
3711 htab = elf32_nios2_hash_table (info);
3712 sgot = htab->root.sgot;
3713 splt = htab->root.splt;
3714 local_got_offsets = elf_local_got_offsets (input_bfd);
3715
82e91538
SL		 3716 if (elf32_nios2_hash_table (info)->h_gp_got == NULL)
3717 got_base = 0;
3718 else
3719 got_base = elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value;
3720
36591ba1
SL		 3721 for (rel = relocs; rel < relend; rel++)
3722 {
3723 reloc_howto_type *howto;
3724 unsigned long r_symndx;
3725 Elf_Internal_Sym *sym;
3726 asection *sec;
3727 struct elf_link_hash_entry *h;
3728 struct elf32_nios2_link_hash_entry *eh;
3729 bfd_vma relocation;
3730 bfd_vma gp;
36591ba1
SL		 3731 bfd_reloc_status_type r = bfd_reloc_ok;
3732 const char *name = NULL;
3733 int r_type;
3734 const char *format;
3735 char msgbuf[256];
3736 const char* msg = (const char*) NULL;
3737 bfd_boolean unresolved_reloc;
3738 bfd_vma off;
3739 int use_plt;
3740
3741 r_type = ELF32_R_TYPE (rel->r_info);
3742 r_symndx = ELF32_R_SYM (rel->r_info);
3743
8c163c5a 3744 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd);
36591ba1
SL		 3745 h = NULL;
3746 sym = NULL;
3747 sec = NULL;
3748
3749 if (r_symndx < symtab_hdr->sh_info)
3750 {
3751 sym = local_syms + r_symndx;
3752 sec = local_sections[r_symndx];
3753 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3754 }
3755 else
3756 {
62d887d4 3757 bfd_boolean warned, ignored;
36591ba1
SL		 3758
3759 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3760 r_symndx, symtab_hdr, sym_hashes,
3761 h, sec, relocation,
62d887d4 3762 unresolved_reloc, warned, ignored);
36591ba1
SL		 3763 }
3764
3765 if (sec && discarded_section (sec))
3766 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3767 rel, 1, relend, howto, 0, contents);
3768
3769 /* Nothing more to do unless this is a final link. */
0e1862bb 3770 if (bfd_link_relocatable (info))
36591ba1
SL		 3771 continue;
3772
36591ba1
SL		 3773 if (howto)
3774 {
3775 switch (howto->type)
3776 {
3777 case R_NIOS2_HI16:
3778 r = nios2_elf32_do_hi16_relocate (input_bfd, howto,
3779 input_section,
3780 contents, rel->r_offset,
3781 relocation, rel->r_addend);
3782 break;
3783 case R_NIOS2_LO16:
3784 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
3785 input_section,
3786 contents, rel->r_offset,
3787 relocation, rel->r_addend);
3788 break;
3789 case R_NIOS2_PCREL_LO:
3790 r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto,
3791 input_section,
3792 contents,
3793 rel->r_offset,
3794 relocation,
3795 rel->r_addend);
3796 break;
3797 case R_NIOS2_HIADJ16:
3798 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
3799 input_section, contents,
3800 rel->r_offset, relocation,
3801 rel->r_addend);
3802 break;
3803 case R_NIOS2_PCREL_HA:
3804 r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto,
3805 input_section,
3806 contents,
3807 rel->r_offset,
3808 relocation,
3809 rel->r_addend);
3810 break;
3811 case R_NIOS2_PCREL16:
3812 r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto,
3813 input_section, contents,
3814 rel->r_offset, relocation,
3815 rel->r_addend);
3816 break;
3817 case R_NIOS2_GPREL:
3818 /* Turns an absolute address into a gp-relative address. */
3819 if (!nios2_elf_assign_gp (output_bfd, &gp, info))
3820 {
a7be2893
SL		 3821 bfd_vma reloc_address;
3822
3823 if (sec && sec->output_section)
3824 reloc_address = (sec->output_section->vma
3825 + sec->output_offset
3826 + rel->r_offset);
3827 else
3828 reloc_address = 0;
3829
36591ba1
SL		 3830 format = _("global pointer relative relocation at address "
3831 "0x%08x when _gp not defined\n");
3832 sprintf (msgbuf, format, reloc_address);
3833 msg = msgbuf;
3834 r = bfd_reloc_dangerous;
3835 }
3836 else
3837 {
3838 bfd_vma symbol_address = rel->r_addend + relocation;
a7be2893 3839 relocation = symbol_address - gp;
36591ba1
SL		 3840 rel->r_addend = 0;
3841 if (((signed) relocation < -32768
3842 || (signed) relocation > 32767)
3843 && (!h
3844 || h->root.type == bfd_link_hash_defined
3845 || h->root.type == bfd_link_hash_defweak))
3846 {
a7be2893
SL		 3847 if (h)
3848 name = h->root.root.string;
695344c0 3849 /* xgettext:c-format */
36591ba1
SL		 3850 format = _("Unable to reach %s (at 0x%08x) from the "
3851 "global pointer (at 0x%08x) because the "
3852 "offset (%d) is out of the allowed range, "
3853 "-32678 to 32767.\n" );
1b786873 3854 sprintf (msgbuf, format, name, symbol_address, gp,
36591ba1
SL		 3855 (signed)relocation);
3856 msg = msgbuf;
3857 r = bfd_reloc_outofrange;
3858 }
3859 else
3860 r = _bfd_final_link_relocate (howto, input_bfd,
3861 input_section, contents,
3862 rel->r_offset, relocation,
3863 rel->r_addend);
3864 }
36591ba1
SL		 3865 break;
3866 case R_NIOS2_UJMP:
3867 r = nios2_elf32_do_ujmp_relocate (input_bfd, howto,
3868 input_section,
3869 contents, rel->r_offset,
3870 relocation, rel->r_addend);
3871 break;
3872 case R_NIOS2_CJMP:
3873 r = nios2_elf32_do_cjmp_relocate (input_bfd, howto,
3874 input_section,
3875 contents, rel->r_offset,
3876 relocation, rel->r_addend);
3877 break;
3878 case R_NIOS2_CALLR:
3879 r = nios2_elf32_do_callr_relocate (input_bfd, howto,
3880 input_section, contents,
3881 rel->r_offset, relocation,
3882 rel->r_addend);
3883 break;
3884 case R_NIOS2_CALL26:
78058a5e 3885 case R_NIOS2_CALL26_NOAT:
36591ba1
SL		 3886 /* If we have a call to an undefined weak symbol, we just want
3887 to stuff a zero in the bits of the call instruction and
3888 bypass the normal call26 relocation handling, because it'll
3889 diagnose an overflow error if address 0 isn't in the same
3890 256MB segment as the call site. Presumably the call
3891 should be guarded by a null check anyway. */
3892 if (h != NULL && h->root.type == bfd_link_hash_undefweak)
3893 {
3894 BFD_ASSERT (relocation == 0 && rel->r_addend == 0);
3895 r = _bfd_final_link_relocate (howto, input_bfd,
3896 input_section, contents,
3897 rel->r_offset, relocation,
3898 rel->r_addend);
3899 break;
3900 }
3901 /* Handle relocations which should use the PLT entry.
3902 NIOS2_BFD_RELOC_32 relocations will use the symbol's value,
3903 which may point to a PLT entry, but we don't need to handle
3904 that here. If we created a PLT entry, all branches in this
3905 object should go to it. */
3906 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
3907 {
3908 /* If we've created a .plt section, and assigned a PLT entry
3909 to this function, it should not be known to bind locally.
3910 If it were, we would have cleared the PLT entry. */
3911 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
3912
3913 relocation = (splt->output_section->vma
3914 + splt->output_offset
3915 + h->plt.offset);
3916
3917 unresolved_reloc = FALSE;
3918 }
78058a5e
SL		 3919 /* Detect R_NIOS2_CALL26 relocations that would overflow the
3920 256MB segment. Replace the target with a reference to a
3921 trampoline instead.
3922 Note that htab->stub_group is null if relaxation has been
3923 disabled by the --no-relax linker command-line option, so
3924 we can use that to skip this processing entirely. */
3925 if (howto->type == R_NIOS2_CALL26 && htab->stub_group)
3926 {
3927 bfd_vma dest = relocation + rel->r_addend;
3928 enum elf32_nios2_stub_type stub_type;
3929
3930 eh = (struct elf32_nios2_link_hash_entry *)h;
3931 stub_type = nios2_type_of_stub (input_section, rel, eh,
3932 htab, dest, NULL);
3933
3934 if (stub_type != nios2_stub_none)
3935 {
3936 struct elf32_nios2_stub_hash_entry *hsh;
3937
3938 hsh = nios2_get_stub_entry (input_section, sec,
3939 eh, rel, htab, stub_type);
3940 if (hsh == NULL)
3941 {
3942 r = bfd_reloc_undefined;
3943 break;
3944 }
3945
3946 dest = (hsh->stub_offset
3947 + hsh->stub_sec->output_offset
3948 + hsh->stub_sec->output_section->vma);
3949 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3950 input_section,
3951 contents,
3952 rel->r_offset,
3953 dest, 0);
3954 break;
3955 }
3956 }
3957
3958 /* Normal case. */
36591ba1
SL		 3959 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3960 input_section, contents,
3961 rel->r_offset, relocation,
3962 rel->r_addend);
3963 break;
3964 case R_NIOS2_ALIGN:
3965 r = bfd_reloc_ok;
3966 /* For symmetry this would be
3967 r = nios2_elf32_do_ignore_reloc (input_bfd, howto,
3968 input_section, contents,
3969 rel->r_offset, relocation,
3970 rel->r_addend);
3971 but do_ignore_reloc would do no more than return
3972 bfd_reloc_ok. */
3973 break;
3974
3975 case R_NIOS2_GOT16:
3976 case R_NIOS2_CALL16:
1c2de463
SL		 3977 case R_NIOS2_GOT_LO:
3978 case R_NIOS2_GOT_HA:
3979 case R_NIOS2_CALL_LO:
3980 case R_NIOS2_CALL_HA:
36591ba1
SL		 3981 /* Relocation is to the entry for this symbol in the
3982 global offset table. */
3983 if (sgot == NULL)
3984 {
3985 r = bfd_reloc_notsupported;
3986 break;
3987 }
3988
3989 use_plt = 0;
3990
3991 if (h != NULL)
3992 {
3993 bfd_boolean dyn;
3994
3995 eh = (struct elf32_nios2_link_hash_entry *)h;
1c2de463 3996 use_plt = (eh->got_types_used == CALL_USED
36591ba1
SL		 3997 && h->plt.offset != (bfd_vma) -1);
3998
3999 off = h->got.offset;
4000 BFD_ASSERT (off != (bfd_vma) -1);
4001 dyn = elf_hash_table (info)->dynamic_sections_created;
0e1862bb
L		 4002 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4003 bfd_link_pic (info),
4004 h)
4005 || (bfd_link_pic (info)
36591ba1
SL		 4006 && SYMBOL_REFERENCES_LOCAL (info, h))
4007 || (ELF_ST_VISIBILITY (h->other)
4008 && h->root.type == bfd_link_hash_undefweak))
4009 {
4010 /* This is actually a static link, or it is a -Bsymbolic
4011 link and the symbol is defined locally. We must
4012 initialize this entry in the global offset table.
4013 Since the offset must always be a multiple of 4, we
4014 use the least significant bit to record whether we
4015 have initialized it already.
4016
4017 When doing a dynamic link, we create a .rela.got
4018 relocation entry to initialize the value. This is
4019 done in the finish_dynamic_symbol routine. */
4020 if ((off & 1) != 0)
4021 off &= ~1;
4022 else
4023 {
4024 bfd_put_32 (output_bfd, relocation,
4025 sgot->contents + off);
4026 h->got.offset |= 1;
4027 }
4028 }
4029 else
4030 unresolved_reloc = FALSE;
4031 }
4032 else
4033 {
4034 BFD_ASSERT (local_got_offsets != NULL
4035 && local_got_offsets[r_symndx] != (bfd_vma) -1);
4036
4037 off = local_got_offsets[r_symndx];
4038
4039 /* The offset must always be a multiple of 4. We use the
4040 least significant bit to record whether we have already
4041 generated the necessary reloc. */
4042 if ((off & 1) != 0)
4043 off &= ~1;
4044 else
4045 {
4046 bfd_put_32 (output_bfd, relocation,
4047 sgot->contents + off);
4048
0e1862bb 4049 if (bfd_link_pic (info))
36591ba1
SL		 4050 {
4051 asection *srelgot;
4052 Elf_Internal_Rela outrel;
4053 bfd_byte *loc;
4054
4055 srelgot = htab->root.srelgot;
4056 BFD_ASSERT (srelgot != NULL);
4057
4058 outrel.r_addend = relocation;
4059 outrel.r_offset = (sgot->output_section->vma
4060 + sgot->output_offset
4061 + off);
4062 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4063 loc = srelgot->contents;
4064 loc += (srelgot->reloc_count++ *
4065 sizeof (Elf32_External_Rela));
4066 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4067 }
4068
4069 local_got_offsets[r_symndx] |= 1;
4070 }
4071 }
4072
0e1862bb 4073 if (use_plt && bfd_link_pic (info))
36591ba1
SL		 4074 {
4075 off = ((h->plt.offset - 24) / 12 + 3) * 4;
82e91538
SL		 4076 relocation = (htab->root.sgotplt->output_offset + off
4077 - got_base);
36591ba1
SL		 4078 }
4079 else
82e91538 4080 relocation = sgot->output_offset + off - got_base;
36591ba1
SL		 4081
4082 /* This relocation does not use the addend. */
4083 rel->r_addend = 0;
4084
1c2de463
SL		 4085 switch (howto->type)
4086 {
4087 case R_NIOS2_GOT_LO:
4088 case R_NIOS2_CALL_LO:
4089 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4090 input_section, contents,
4091 rel->r_offset, relocation,
4092 rel->r_addend);
4093 break;
4094 case R_NIOS2_GOT_HA:
4095 case R_NIOS2_CALL_HA:
4096 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4097 input_section, contents,
4098 rel->r_offset,
4099 relocation,
4100 rel->r_addend);
4101 break;
4102 default:
4103 r = _bfd_final_link_relocate (howto, input_bfd,
4104 input_section, contents,
4105 rel->r_offset, relocation,
4106 rel->r_addend);
4107 break;
4108 }
36591ba1
SL		 4109 break;
4110
4111 case R_NIOS2_GOTOFF_LO:
4112 case R_NIOS2_GOTOFF_HA:
4113 case R_NIOS2_GOTOFF:
82e91538 4114 /* Relocation is relative to the global offset table pointer. */
36591ba1
SL		 4115
4116 BFD_ASSERT (sgot != NULL);
4117 if (sgot == NULL)
4118 {
4119 r = bfd_reloc_notsupported;
4120 break;
4121 }
4122
d9972968
CLT		 4123 /* Note that sgot->output_offset is not involved in this
4124 calculation. We always want the start of .got. */
4125 relocation -= sgot->output_section->vma;
4126
4127 /* Now we adjust the relocation to be relative to the GOT pointer
4128 (the _gp_got symbol), which possibly contains the 0x8000 bias. */
4129 relocation -= got_base;
82e91538 4130
36591ba1
SL		 4131 switch (howto->type)
4132 {
4133 case R_NIOS2_GOTOFF_LO:
4134 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4135 input_section, contents,
4136 rel->r_offset, relocation,
4137 rel->r_addend);
4138 break;
4139 case R_NIOS2_GOTOFF_HA:
4140 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4141 input_section, contents,
4142 rel->r_offset,
4143 relocation,
4144 rel->r_addend);
4145 break;
4146 default:
4147 r = _bfd_final_link_relocate (howto, input_bfd,
4148 input_section, contents,
4149 rel->r_offset, relocation,
4150 rel->r_addend);
4151 break;
4152 }
4153 break;
4154
4155 case R_NIOS2_TLS_LDO16:
4156 relocation -= dtpoff_base (info) + DTP_OFFSET;
4157
4158 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4159 contents, rel->r_offset,
4160 relocation, rel->r_addend);
4161 break;
4162 case R_NIOS2_TLS_LDM16:
4163 if (htab->root.sgot == NULL)
4164 abort ();
4165
4166 off = htab->tls_ldm_got.offset;
4167
4168 if ((off & 1) != 0)
4169 off &= ~1;
4170 else
4171 {
4172 /* If we don't know the module number, create a relocation
4173 for it. */
0e1862bb 4174 if (bfd_link_pic (info))
36591ba1
SL		 4175 {
4176 Elf_Internal_Rela outrel;
4177 bfd_byte *loc;
4178
4179 if (htab->root.srelgot == NULL)
4180 abort ();
4181
4182 outrel.r_addend = 0;
4183 outrel.r_offset = (htab->root.sgot->output_section->vma
4184 + htab->root.sgot->output_offset
4185 + off);
4186 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD);
4187
4188 loc = htab->root.srelgot->contents;
4189 loc += (htab->root.srelgot->reloc_count++
4190 * sizeof (Elf32_External_Rela));
4191 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4192 }
4193 else
4194 bfd_put_32 (output_bfd, 1,
4195 htab->root.sgot->contents + off);
4196
4197 htab->tls_ldm_got.offset |= 1;
4198 }
4199
82e91538 4200 relocation = htab->root.sgot->output_offset + off - got_base;
36591ba1
SL		 4201
4202 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4203 contents, rel->r_offset,
4204 relocation, rel->r_addend);
4205
4206 break;
4207 case R_NIOS2_TLS_GD16:
4208 case R_NIOS2_TLS_IE16:
4209 {
4210 int indx;
4211 char tls_type;
4212
4213 if (htab->root.sgot == NULL)
4214 abort ();
4215
4216 indx = 0;
4217 if (h != NULL)
4218 {
4219 bfd_boolean dyn;
4220 dyn = htab->root.dynamic_sections_created;
0e1862bb
L		 4221 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4222 bfd_link_pic (info),
4223 h)
4224 && (!bfd_link_pic (info)
36591ba1
SL		 4225 || !SYMBOL_REFERENCES_LOCAL (info, h)))
4226 {
4227 unresolved_reloc = FALSE;
4228 indx = h->dynindx;
4229 }
4230 off = h->got.offset;
4231 tls_type = (((struct elf32_nios2_link_hash_entry *) h)
4232 ->tls_type);
4233 }
4234 else
4235 {
4236 if (local_got_offsets == NULL)
4237 abort ();
4238 off = local_got_offsets[r_symndx];
4239 tls_type = (elf32_nios2_local_got_tls_type (input_bfd)
4240 [r_symndx]);
4241 }
4242
4243 if (tls_type == GOT_UNKNOWN)
4244 abort ();
4245
4246 if ((off & 1) != 0)
4247 off &= ~1;
4248 else
4249 {
4250 bfd_boolean need_relocs = FALSE;
4251 Elf_Internal_Rela outrel;
4252 bfd_byte *loc = NULL;
4253 int cur_off = off;
4254
4255 /* The GOT entries have not been initialized yet. Do it
4256 now, and emit any relocations. If both an IE GOT and a
4257 GD GOT are necessary, we emit the GD first. */
4258
0e1862bb 4259 if ((bfd_link_pic (info) || indx != 0)
36591ba1
SL		 4260 && (h == NULL
4261 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4262 || h->root.type != bfd_link_hash_undefweak))
4263 {
4264 need_relocs = TRUE;
4265 if (htab->root.srelgot == NULL)
4266 abort ();
4267 loc = htab->root.srelgot->contents;
4268 loc += (htab->root.srelgot->reloc_count *
4269 sizeof (Elf32_External_Rela));
4270 }
4271
4272 if (tls_type & GOT_TLS_GD)
4273 {
4274 if (need_relocs)
4275 {
4276 outrel.r_addend = 0;
4277 outrel.r_offset = (htab->root.sgot->output_section->vma
4278 + htab->root.sgot->output_offset
4279 + cur_off);
4280 outrel.r_info = ELF32_R_INFO (indx,
4281 R_NIOS2_TLS_DTPMOD);
4282
4283 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4284 loc);
4285 htab->root.srelgot->reloc_count++;
4286 loc += sizeof (Elf32_External_Rela);
4287
4288 if (indx == 0)
4289 bfd_put_32 (output_bfd,
4290 (relocation - dtpoff_base (info) -
4291 DTP_OFFSET),
4292 htab->root.sgot->contents + cur_off + 4);
4293 else
4294 {
4295 outrel.r_addend = 0;
4296 outrel.r_info = ELF32_R_INFO (indx,
4297 R_NIOS2_TLS_DTPREL);
4298 outrel.r_offset += 4;
4299
4300 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4301 loc);
4302 htab->root.srelgot->reloc_count++;
4303 loc += sizeof (Elf32_External_Rela);
4304 }
4305 }
4306 else
4307 {
4308 /* If we are not emitting relocations for a
4309 general dynamic reference, then we must be in a
4310 static link or an executable link with the
4311 symbol binding locally. Mark it as belonging
4312 to module 1, the executable. */
4313 bfd_put_32 (output_bfd, 1,
4314 htab->root.sgot->contents + cur_off);
4315 bfd_put_32 (output_bfd, (relocation -
4316 dtpoff_base (info) -
4317 DTP_OFFSET),
4318 htab->root.sgot->contents + cur_off + 4);
4319 }
4320
4321 cur_off += 8;
4322 }
4323
4324 if (tls_type & GOT_TLS_IE)
4325 {
4326 if (need_relocs)
4327 {
4328 if (indx == 0)
4329 outrel.r_addend = (relocation -
4330 dtpoff_base (info));
4331 else
4332 outrel.r_addend = 0;
4333 outrel.r_offset = (htab->root.sgot->output_section->vma
4334 + htab->root.sgot->output_offset
4335 + cur_off);
4336 outrel.r_info = ELF32_R_INFO (indx,
4337 R_NIOS2_TLS_TPREL);
4338
4339 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4340 loc);
4341 htab->root.srelgot->reloc_count++;
4342 loc += sizeof (Elf32_External_Rela);
4343 }
4344 else
4345 bfd_put_32 (output_bfd, (tpoff (info, relocation)
4346 - TP_OFFSET),
4347 htab->root.sgot->contents + cur_off);
4348 cur_off += 4;
4349 }
4350
4351 if (h != NULL)
4352 h->got.offset |= 1;
4353 else
4354 local_got_offsets[r_symndx] |= 1;
4355 }
4356
4357 if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16)
4358 off += 8;
82e91538 4359 relocation = htab->root.sgot->output_offset + off - got_base;
36591ba1
SL		 4360
4361 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4362 contents, rel->r_offset,
4363 relocation, rel->r_addend);
4364 }
4365
4366 break;
4367 case R_NIOS2_TLS_LE16:
3cbc1e5e 4368 if (bfd_link_dll (info))
36591ba1 4369 {
4eca0228 4370 _bfd_error_handler
695344c0 4371 /* xgettext:c-format */
36591ba1
SL		 4372 (_("%B(%A+0x%lx): R_NIOS2_TLS_LE16 relocation not "
4373 "permitted in shared object"),
4374 input_bfd, input_section,
4375 (long) rel->r_offset, howto->name);
4376 return FALSE;
4377 }
4378 else
4379 relocation = tpoff (info, relocation) - TP_OFFSET;
4380
4381 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4382 contents, rel->r_offset,
4383 relocation, rel->r_addend);
4384 break;
4385
4386 case R_NIOS2_BFD_RELOC_32:
0e1862bb 4387 if (bfd_link_pic (info)
36591ba1
SL		 4388 && (input_section->flags & SEC_ALLOC) != 0
4389 && (h == NULL
4390 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4391 || h->root.type != bfd_link_hash_undefweak))
4392 {
4393 Elf_Internal_Rela outrel;
4394 bfd_byte *loc;
4395 bfd_boolean skip, relocate;
4396
4397 /* When generating a shared object, these relocations
4398 are copied into the output file to be resolved at run
4399 time. */
4400
4401 skip = FALSE;
4402 relocate = FALSE;
4403
4404 outrel.r_offset
4405 = _bfd_elf_section_offset (output_bfd, info,
4406 input_section, rel->r_offset);
4407 if (outrel.r_offset == (bfd_vma) -1)
4408 skip = TRUE;
4409 else if (outrel.r_offset == (bfd_vma) -2)
4410 skip = TRUE, relocate = TRUE;
4411 outrel.r_offset += (input_section->output_section->vma
4412 + input_section->output_offset);
4413
4414 if (skip)
4415 memset (&outrel, 0, sizeof outrel);
4416 else if (h != NULL
4417 && h->dynindx != -1
0e1862bb 4418 && (!bfd_link_pic (info)
a496fbc8 4419 || !SYMBOLIC_BIND (info, h)
36591ba1
SL		 4420 || !h->def_regular))
4421 {
4422 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4423 outrel.r_addend = rel->r_addend;
4424 }
4425 else
4426 {
4427 /* This symbol is local, or marked to become local. */
4428 outrel.r_addend = relocation + rel->r_addend;
4429 relocate = TRUE;
4430 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4431 }
4432
4433 sreloc = elf_section_data (input_section)->sreloc;
4434 if (sreloc == NULL)
4435 abort ();
4436
4437 loc = sreloc->contents;
4438 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4439 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4440
4441 /* This reloc will be computed at runtime, so there's no
4442 need to do anything now, except for R_NIOS2_BFD_RELOC_32
4443 relocations that have been turned into
4444 R_NIOS2_RELATIVE. */
4445 if (!relocate)
4446 break;
4447 }
4448
4449 r = _bfd_final_link_relocate (howto, input_bfd,
4450 input_section, contents,
4451 rel->r_offset, relocation,
4452 rel->r_addend);
4453 break;
4454
4455 case R_NIOS2_TLS_DTPREL:
4456 relocation -= dtpoff_base (info);
4457 /* Fall through. */
4458
4459 default:
4460 r = _bfd_final_link_relocate (howto, input_bfd,
4461 input_section, contents,
4462 rel->r_offset, relocation,
4463 rel->r_addend);
4464 break;
4465 }
4466 }
4467 else
4468 r = bfd_reloc_notsupported;
4469
4470 if (r != bfd_reloc_ok)
4471 {
4472 if (h != NULL)
4473 name = h->root.root.string;
4474 else
4475 {
4476 name = bfd_elf_string_from_elf_section (input_bfd,
4477 symtab_hdr->sh_link,
4478 sym->st_name);
4479 if (name == NULL || *name == '\0')
4480 name = bfd_section_name (input_bfd, sec);
4481 }
4482
4483 switch (r)
4484 {
4485 case bfd_reloc_overflow:
1a72702b
AM		 4486 (*info->callbacks->reloc_overflow) (info, NULL, name,
4487 howto->name, (bfd_vma) 0,
4488 input_bfd, input_section,
4489 rel->r_offset);
36591ba1
SL		 4490 break;
4491
4492 case bfd_reloc_undefined:
1a72702b
AM		 4493 (*info->callbacks->undefined_symbol) (info, name, input_bfd,
4494 input_section,
4495 rel->r_offset, TRUE);
36591ba1
SL		 4496 break;
4497
4498 case bfd_reloc_outofrange:
4499 if (msg == NULL)
4500 msg = _("relocation out of range");
4501 break;
4502
4503 case bfd_reloc_notsupported:
4504 if (msg == NULL)
4505 msg = _("unsupported relocation");
4506 break;
4507
4508 case bfd_reloc_dangerous:
4509 if (msg == NULL)
4510 msg = _("dangerous relocation");
4511 break;
4512
4513 default:
4514 if (msg == NULL)
4515 msg = _("unknown error");
4516 break;
4517 }
4518
4519 if (msg)
4520 {
1a72702b
AM		 4521 (*info->callbacks->warning) (info, msg, name, input_bfd,
4522 input_section, rel->r_offset);
36591ba1
SL		 4523 return FALSE;
4524 }
4525 }
4526 }
4527 return TRUE;
4528}
4529
4530/* Implement elf-backend_section_flags:
4531 Convert NIOS2 specific section flags to bfd internal section flags. */
4532static bfd_boolean
4533nios2_elf32_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
4534{
4535 if (hdr->sh_flags & SHF_NIOS2_GPREL)
4536 *flags |= SEC_SMALL_DATA;
4537
4538 return TRUE;
4539}
4540
4541/* Implement elf_backend_fake_sections:
4542 Set the correct type for an NIOS2 ELF section. We do this by the
4543 section name, which is a hack, but ought to work. */
4544static bfd_boolean
4545nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
4546 Elf_Internal_Shdr *hdr, asection *sec)
4547{
4548 register const char *name = bfd_get_section_name (abfd, sec);
4549
4550 if ((sec->flags & SEC_SMALL_DATA)
4551 || strcmp (name, ".sdata") == 0
4552 || strcmp (name, ".sbss") == 0
4553 || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0)
4554 hdr->sh_flags |= SHF_NIOS2_GPREL;
4555
4556 return TRUE;
4557}
4558
4559/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
4560 shortcuts to them in our hash table. */
4561static bfd_boolean
4562create_got_section (bfd *dynobj, struct bfd_link_info *info)
4563{
4564 struct elf32_nios2_link_hash_table *htab;
82e91538 4565 struct elf_link_hash_entry *h;
36591ba1
SL		 4566
4567 htab = elf32_nios2_hash_table (info);
4568
4569 if (! _bfd_elf_create_got_section (dynobj, info))
4570 return FALSE;
4571
4572 /* In order for the two loads in .PLTresolve to share the same %hiadj,
4573 _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */
4574 if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4))
4575 return FALSE;
4576
82e91538
SL		 4577 /* The Nios II ABI specifies that GOT-relative relocations are relative
4578 to the linker-created symbol _gp_got, rather than using
4579 _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always
4580 points to the base of the GOT while _gp_got may include a bias. */
4581 h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt,
4582 "_gp_got");
4583 elf32_nios2_hash_table (info)->h_gp_got = h;
4584 if (h == NULL)
4585 return FALSE;
4586
36591ba1
SL		 4587 return TRUE;
4588}
4589
4590/* Implement elf_backend_create_dynamic_sections:
4591 Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
4592 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
4593 hash table. */
4594static bfd_boolean
4595nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4596{
4597 struct elf32_nios2_link_hash_table *htab;
4598
4599 htab = elf32_nios2_hash_table (info);
4600 if (!htab->root.sgot && !create_got_section (dynobj, info))
4601 return FALSE;
4602
9d19e4fd
AM		 4603 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4604 return FALSE;
36591ba1
SL		 4605
4606 /* In order for the two loads in a shared object .PLTresolve to share the
4607 same %hiadj, the start of the PLT (as well as the GOT) must be aligned
4608 to a 16-byte boundary. This is because the addresses for these loads
4609 include the -(.plt+4) PIC correction. */
9d19e4fd 4610 return bfd_set_section_alignment (dynobj, htab->root.splt, 4);
36591ba1
SL		 4611}
4612
4613/* Implement elf_backend_copy_indirect_symbol:
4614 Copy the extra info we tack onto an elf_link_hash_entry. */
4615static void
4616nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info,
4617 struct elf_link_hash_entry *dir,
4618 struct elf_link_hash_entry *ind)
4619{
4620 struct elf32_nios2_link_hash_entry *edir, *eind;
4621
4622 edir = (struct elf32_nios2_link_hash_entry *) dir;
4623 eind = (struct elf32_nios2_link_hash_entry *) ind;
4624
4625 if (eind->dyn_relocs != NULL)
4626 {
4627 if (edir->dyn_relocs != NULL)
4628 {
4629 struct elf32_nios2_dyn_relocs **pp;
4630 struct elf32_nios2_dyn_relocs *p;
4631
4632 /* Add reloc counts against the indirect sym to the direct sym
4633 list. Merge any entries against the same section. */
4634 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4635 {
4636 struct elf32_nios2_dyn_relocs *q;
4637
4638 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4639 if (q->sec == p->sec)
4640 {
4641 q->pc_count += p->pc_count;
4642 q->count += p->count;
4643 *pp = p->next;
4644 break;
4645 }
4646 if (q == NULL)
4647 pp = &p->next;
4648 }
4649 *pp = edir->dyn_relocs;
4650 }
4651
4652 edir->dyn_relocs = eind->dyn_relocs;
4653 eind->dyn_relocs = NULL;
4654 }
4655
4656 if (ind->root.type == bfd_link_hash_indirect
4657 && dir->got.refcount <= 0)
4658 {
4659 edir->tls_type = eind->tls_type;
4660 eind->tls_type = GOT_UNKNOWN;
4661 }
4662
4663 edir->got_types_used |= eind->got_types_used;
4664
4665 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
4666}
4667
965b1d80
SL		 4668/* Set the right machine number for a NIOS2 ELF file. */
4669
4670static bfd_boolean
4671nios2_elf32_object_p (bfd *abfd)
4672{
4673 unsigned long mach;
4674
4675 mach = elf_elfheader (abfd)->e_flags;
4676
4677 switch (mach)
4678 {
4679 default:
4680 case EF_NIOS2_ARCH_R1:
4681 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1);
4682 break;
4683 case EF_NIOS2_ARCH_R2:
4684 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2);
4685 break;
4686 }
4687
4688 return TRUE;
4689}
4690
36591ba1
SL		 4691/* Implement elf_backend_check_relocs:
4692 Look through the relocs for a section during the first phase. */
4693static bfd_boolean
4694nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
4695 asection *sec, const Elf_Internal_Rela *relocs)
4696{
4697 bfd *dynobj;
4698 Elf_Internal_Shdr *symtab_hdr;
4699 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4700 const Elf_Internal_Rela *rel;
4701 const Elf_Internal_Rela *rel_end;
4702 struct elf32_nios2_link_hash_table *htab;
4703 asection *sgot;
4704 asection *srelgot;
4705 asection *sreloc = NULL;
4706 bfd_signed_vma *local_got_refcounts;
4707
0e1862bb 4708 if (bfd_link_relocatable (info))
36591ba1
SL		 4709 return TRUE;
4710
4711 dynobj = elf_hash_table (info)->dynobj;
4712 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4713 sym_hashes = elf_sym_hashes (abfd);
4714 sym_hashes_end = (sym_hashes
4715 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
4716 if (!elf_bad_symtab (abfd))
4717 sym_hashes_end -= symtab_hdr->sh_info;
4718 local_got_refcounts = elf_local_got_refcounts (abfd);
4719
4720 htab = elf32_nios2_hash_table (info);
4721 sgot = htab->root.sgot;
4722 srelgot = htab->root.srelgot;
4723
4724 rel_end = relocs + sec->reloc_count;
4725 for (rel = relocs; rel < rel_end; rel++)
4726 {
4727 unsigned int r_type;
4728 struct elf_link_hash_entry *h;
4729 unsigned long r_symndx;
4730
4731 r_symndx = ELF32_R_SYM (rel->r_info);
4732 if (r_symndx < symtab_hdr->sh_info)
4733 h = NULL;
4734 else
4735 {
4736 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4737 while (h->root.type == bfd_link_hash_indirect
4738 || h->root.type == bfd_link_hash_warning)
4739 h = (struct elf_link_hash_entry *) h->root.u.i.link;
81fbe831
AM		 4740
4741 /* PR15323, ref flags aren't set for references in the same
4742 object. */
4743 h->root.non_ir_ref = 1;
36591ba1
SL		 4744 }
4745
4746 r_type = ELF32_R_TYPE (rel->r_info);
4747
4748 switch (r_type)
4749 {
4750 case R_NIOS2_GOT16:
1c2de463
SL		 4751 case R_NIOS2_GOT_LO:
4752 case R_NIOS2_GOT_HA:
36591ba1 4753 case R_NIOS2_CALL16:
1c2de463
SL		 4754 case R_NIOS2_CALL_LO:
4755 case R_NIOS2_CALL_HA:
36591ba1
SL		 4756 case R_NIOS2_TLS_GD16:
4757 case R_NIOS2_TLS_IE16:
4758 /* This symbol requires a global offset table entry. */
4759 {
4760 int tls_type, old_tls_type;
4761
4762 switch (r_type)
4763 {
4764 default:
4765 case R_NIOS2_GOT16:
1c2de463
SL		 4766 case R_NIOS2_GOT_LO:
4767 case R_NIOS2_GOT_HA:
36591ba1 4768 case R_NIOS2_CALL16:
1c2de463
SL		 4769 case R_NIOS2_CALL_LO:
4770 case R_NIOS2_CALL_HA:
36591ba1
SL		 4771 tls_type = GOT_NORMAL;
4772 break;
4773 case R_NIOS2_TLS_GD16:
4774 tls_type = GOT_TLS_GD;
4775 break;
4776 case R_NIOS2_TLS_IE16:
4777 tls_type = GOT_TLS_IE;
4778 break;
4779 }
4780
4781 if (dynobj == NULL)
4782 {
4783 /* Create the .got section. */
4784 elf_hash_table (info)->dynobj = dynobj = abfd;
4785 nios2_elf32_create_dynamic_sections (dynobj, info);
4786 }
4787
4788 if (sgot == NULL)
4789 {
4790 sgot = htab->root.sgot;
4791 BFD_ASSERT (sgot != NULL);
4792 }
4793
4794 if (srelgot == NULL
0e1862bb 4795 && (h != NULL || bfd_link_pic (info)))
36591ba1
SL		 4796 {
4797 srelgot = htab->root.srelgot;
4798 BFD_ASSERT (srelgot != NULL);
4799 }
4800
4801 if (h != NULL)
4802 {
4803 struct elf32_nios2_link_hash_entry *eh
4804 = (struct elf32_nios2_link_hash_entry *)h;
4805 h->got.refcount++;
4806 old_tls_type = elf32_nios2_hash_entry(h)->tls_type;
1c2de463
SL		 4807 if (r_type == R_NIOS2_CALL16
4808 || r_type == R_NIOS2_CALL_LO
4809 || r_type == R_NIOS2_CALL_HA)
36591ba1
SL		 4810 {
4811 /* Make sure a plt entry is created for this symbol if
4812 it turns out to be a function defined by a dynamic
4813 object. */
4814 h->plt.refcount++;
4815 h->needs_plt = 1;
4816 h->type = STT_FUNC;
1c2de463 4817 eh->got_types_used |= CALL_USED;
36591ba1
SL		 4818 }
4819 else
1c2de463 4820 eh->got_types_used |= GOT_USED;
36591ba1
SL		 4821 }
4822 else
4823 {
4824 /* This is a global offset table entry for a local symbol. */
4825 if (local_got_refcounts == NULL)
4826 {
4827 bfd_size_type size;
4828
4829 size = symtab_hdr->sh_info;
4830 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4831 local_got_refcounts
4832 = ((bfd_signed_vma *) bfd_zalloc (abfd, size));
4833 if (local_got_refcounts == NULL)
4834 return FALSE;
4835 elf_local_got_refcounts (abfd) = local_got_refcounts;
4836 elf32_nios2_local_got_tls_type (abfd)
4837 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4838 }
4839 local_got_refcounts[r_symndx]++;
4840 old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx];
4841 }
4842
4843 /* We will already have issued an error message if there is a
4844 TLS / non-TLS mismatch, based on the symbol type. We don't
4845 support any linker relaxations. So just combine any TLS
4846 types needed. */
4847 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4848 && tls_type != GOT_NORMAL)
4849 tls_type |= old_tls_type;
4850
4851 if (old_tls_type != tls_type)
4852 {
4853 if (h != NULL)
4854 elf32_nios2_hash_entry (h)->tls_type = tls_type;
4855 else
4856 elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type;
4857 }
4858 }
4859 /* Fall through */
4860 case R_NIOS2_TLS_LDM16:
4861 if (r_type == R_NIOS2_TLS_LDM16)
4862 htab->tls_ldm_got.refcount++;
4863
4864 if (htab->root.sgot == NULL)
4865 {
4866 if (htab->root.dynobj == NULL)
4867 htab->root.dynobj = abfd;
4868 if (!create_got_section (htab->root.dynobj, info))
4869 return FALSE;
4870 }
4871 break;
4872
4873 /* This relocation describes the C++ object vtable hierarchy.
4874 Reconstruct it for later use during GC. */
4875 case R_NIOS2_GNU_VTINHERIT:
4876 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4877 return FALSE;
4878 break;
4879
4880 /* This relocation describes which C++ vtable entries are actually
4881 used. Record for later use during GC. */
4882 case R_NIOS2_GNU_VTENTRY:
4883 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4884 return FALSE;
4885 break;
4886
4887 case R_NIOS2_BFD_RELOC_32:
4888 case R_NIOS2_CALL26:
78058a5e 4889 case R_NIOS2_CALL26_NOAT:
36591ba1
SL		 4890 case R_NIOS2_HIADJ16:
4891 case R_NIOS2_LO16:
4892
4893 if (h != NULL)
4894 {
4895 /* If this reloc is in a read-only section, we might
4896 need a copy reloc. We can't check reliably at this
4897 stage whether the section is read-only, as input
4898 sections have not yet been mapped to output sections.
4899 Tentatively set the flag for now, and correct in
4900 adjust_dynamic_symbol. */
0e1862bb 4901 if (!bfd_link_pic (info))
36591ba1
SL		 4902 h->non_got_ref = 1;
4903
4904 /* Make sure a plt entry is created for this symbol if it
4905 turns out to be a function defined by a dynamic object. */
4906 h->plt.refcount++;
4907
78058a5e 4908 if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT)
36591ba1
SL		 4909 h->needs_plt = 1;
4910 }
4911
4912 /* If we are creating a shared library, we need to copy the
4913 reloc into the shared library. */
0e1862bb 4914 if (bfd_link_pic (info)
36591ba1
SL		 4915 && (sec->flags & SEC_ALLOC) != 0
4916 && (r_type == R_NIOS2_BFD_RELOC_32
4917 || (h != NULL && ! h->needs_plt
a496fbc8 4918 && (! SYMBOLIC_BIND (info, h) || ! h->def_regular))))
36591ba1
SL		 4919 {
4920 struct elf32_nios2_dyn_relocs *p;
4921 struct elf32_nios2_dyn_relocs **head;
4922
4923 /* When creating a shared object, we must copy these
4924 reloc types into the output file. We create a reloc
4925 section in dynobj and make room for this reloc. */
4926 if (sreloc == NULL)
4927 {
4928 sreloc = _bfd_elf_make_dynamic_reloc_section
4929 (sec, dynobj, 2, abfd, TRUE);
4930 if (sreloc == NULL)
4931 return FALSE;
4932 }
4933
4934 /* If this is a global symbol, we count the number of
4935 relocations we need for this symbol. */
4936 if (h != NULL)
4937 head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs;
4938 else
4939 {
4940 /* Track dynamic relocs needed for local syms too.
4941 We really need local syms available to do this
4942 easily. Oh well. */
4943
4944 asection *s;
4945 void *vpp;
4946 Elf_Internal_Sym *isym;
4947
4948 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4949 abfd, r_symndx);
4950 if (isym == NULL)
4951 return FALSE;
4952
4953 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4954 if (s == NULL)
4955 s = sec;
4956
4957 vpp = &elf_section_data (s)->local_dynrel;
4958 head = (struct elf32_nios2_dyn_relocs **) vpp;
4959 }
4960
4961 p = *head;
4962 if (p == NULL || p->sec != sec)
4963 {
4964 bfd_size_type amt = sizeof *p;
4965 p = ((struct elf32_nios2_dyn_relocs *)
4966 bfd_alloc (htab->root.dynobj, amt));
4967 if (p == NULL)
4968 return FALSE;
4969 p->next = *head;
4970 *head = p;
4971 p->sec = sec;
4972 p->count = 0;
4973 p->pc_count = 0;
4974 }
4975
4976 p->count += 1;
4977
4978 }
4979 break;
4980 }
4981 }
4982
4983 return TRUE;
4984}
4985
4986
4987/* Implement elf_backend_gc_mark_hook:
4988 Return the section that should be marked against GC for a given
4989 relocation. */
4990static asection *
4991nios2_elf32_gc_mark_hook (asection *sec,
25153ba0 4992 struct bfd_link_info *info,
36591ba1
SL		 4993 Elf_Internal_Rela *rel,
4994 struct elf_link_hash_entry *h,
4995 Elf_Internal_Sym *sym)
4996{
4997 if (h != NULL)
4998 switch (ELF32_R_TYPE (rel->r_info))
4999 {
5000 case R_NIOS2_GNU_VTINHERIT:
5001 case R_NIOS2_GNU_VTENTRY:
5002 return NULL;
5003 }
5004 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5005}
5006
5007/* Implement elf_backend_gc_sweep_hook:
5008 Update the got entry reference counts for the section being removed. */
5009static bfd_boolean
5010nios2_elf32_gc_sweep_hook (bfd *abfd,
5011 struct bfd_link_info *info,
5012 asection *sec,
5013 const Elf_Internal_Rela *relocs)
5014{
5015 Elf_Internal_Shdr *symtab_hdr;
5016 struct elf_link_hash_entry **sym_hashes;
5017 bfd_signed_vma *local_got_refcounts;
5018 const Elf_Internal_Rela *rel, *relend;
5019 bfd *dynobj;
5020
0e1862bb 5021 if (bfd_link_relocatable (info))
36591ba1
SL		 5022 return TRUE;
5023
5024 elf_section_data (sec)->local_dynrel = NULL;
5025
5026 dynobj = elf_hash_table (info)->dynobj;
5027 if (dynobj == NULL)
5028 return TRUE;
5029
5030 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5031 sym_hashes = elf_sym_hashes (abfd);
5032 local_got_refcounts = elf_local_got_refcounts (abfd);
5033
5034 relend = relocs + sec->reloc_count;
5035 for (rel = relocs; rel < relend; rel++)
5036 {
5037 unsigned long r_symndx;
5038 struct elf_link_hash_entry *h = NULL;
5039 int r_type;
5040
5041 r_symndx = ELF32_R_SYM (rel->r_info);
5042 if (r_symndx >= symtab_hdr->sh_info)
5043 {
5044 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5045 while (h->root.type == bfd_link_hash_indirect
5046 || h->root.type == bfd_link_hash_warning)
5047 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5048 }
5049
5050 r_type = ELF32_R_TYPE (rel->r_info);
5051 switch (r_type)
5052 {
5053 case R_NIOS2_GOT16:
1c2de463
SL		 5054 case R_NIOS2_GOT_LO:
5055 case R_NIOS2_GOT_HA:
36591ba1 5056 case R_NIOS2_CALL16:
1c2de463
SL		 5057 case R_NIOS2_CALL_LO:
5058 case R_NIOS2_CALL_HA:
36591ba1
SL		 5059 if (h != NULL)
5060 {
5061 if (h->got.refcount > 0)
5062 --h->got.refcount;
5063 }
5064 else if (local_got_refcounts != NULL)
5065 {
5066 if (local_got_refcounts[r_symndx] > 0)
5067 --local_got_refcounts[r_symndx];
5068 }
5069 break;
5070
5071 case R_NIOS2_PCREL_LO:
5072 case R_NIOS2_PCREL_HA:
5073 case R_NIOS2_BFD_RELOC_32:
5074 case R_NIOS2_CALL26:
78058a5e 5075 case R_NIOS2_CALL26_NOAT:
36591ba1
SL		 5076 if (h != NULL)
5077 {
5078 struct elf32_nios2_link_hash_entry *eh;
5079 struct elf32_nios2_dyn_relocs **pp;
5080 struct elf32_nios2_dyn_relocs *p;
5081
5082 eh = (struct elf32_nios2_link_hash_entry *) h;
5083
5084 if (h->plt.refcount > 0)
5085 --h->plt.refcount;
5086
5087 if (r_type == R_NIOS2_PCREL_LO || r_type == R_NIOS2_PCREL_HA
5088 || r_type == R_NIOS2_BFD_RELOC_32)
5089 {
5090 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;
5091 pp = &p->next)
5092 if (p->sec == sec)
5093 {
5094 p->count -= 1;
5095 if (p->count == 0)
5096 *pp = p->next;
5097 break;
5098 }
5099 }
5100 }
5101 break;
5102
5103 default:
5104 break;
5105 }
5106 }
5107
5108 return TRUE;
5109}
5110
36591ba1
SL		 5111/* Implement elf_backend_finish_dynamic_symbols:
5112 Finish up dynamic symbol handling. We set the contents of various
5113 dynamic sections here. */
5114static bfd_boolean
5115nios2_elf32_finish_dynamic_symbol (bfd *output_bfd,
5116 struct bfd_link_info *info,
5117 struct elf_link_hash_entry *h,
5118 Elf_Internal_Sym *sym)
5119{
5120 struct elf32_nios2_link_hash_table *htab;
5121 struct elf32_nios2_link_hash_entry *eh
5122 = (struct elf32_nios2_link_hash_entry *)h;
5123 int use_plt;
5124
5125 htab = elf32_nios2_hash_table (info);
5126
5127 if (h->plt.offset != (bfd_vma) -1)
5128 {
5129 asection *splt;
5130 asection *sgotplt;
5131 asection *srela;
5132 bfd_vma plt_index;
5133 bfd_vma got_offset;
5134 Elf_Internal_Rela rela;
5135 bfd_byte *loc;
5136 bfd_vma got_address;
5137
5138 /* This symbol has an entry in the procedure linkage table. Set
5139 it up. */
5140 BFD_ASSERT (h->dynindx != -1);
5141 splt = htab->root.splt;
5142 sgotplt = htab->root.sgotplt;
5143 srela = htab->root.srelplt;
5144 BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL);
5145
5146 /* Emit the PLT entry. */
0e1862bb 5147 if (bfd_link_pic (info))
36591ba1
SL		 5148 {
5149 nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset,
5150 3);
5151 plt_index = (h->plt.offset - 24) / 12;
5152 got_offset = (plt_index + 3) * 4;
5153 nios2_elf32_install_imm16 (splt, h->plt.offset,
5154 hiadj(plt_index * 4));
5155 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5156 (plt_index * 4) & 0xffff);
5157 nios2_elf32_install_imm16 (splt, h->plt.offset + 8,
5158 0xfff4 - h->plt.offset);
5159 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5160 + got_offset);
5161
5162 /* Fill in the entry in the global offset table. There are no
5163 res_n slots for a shared object PLT, instead the .got.plt entries
5164 point to the PLT entries. */
5165 bfd_put_32 (output_bfd,
5166 splt->output_section->vma + splt->output_offset
5167 + h->plt.offset, sgotplt->contents + got_offset);
5168 }
5169 else
5170 {
5171 plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12;
5172 got_offset = (plt_index + 3) * 4;
5173
5174 nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3);
5175 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5176 + got_offset);
5177 nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address));
5178 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5179 got_address & 0xffff);
5180
5181 /* Fill in the entry in the global offset table. */
5182 bfd_put_32 (output_bfd,
5183 splt->output_section->vma + splt->output_offset
5184 + plt_index * 4, sgotplt->contents + got_offset);
5185 }
5186
5187 /* Fill in the entry in the .rela.plt section. */
5188 rela.r_offset = got_address;
5189 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT);
5190 rela.r_addend = 0;
5191 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
5192 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5193
5194 if (!h->def_regular)
5195 {
5196 /* Mark the symbol as undefined, rather than as defined in
5197 the .plt section. Leave the value alone. */
5198 sym->st_shndx = SHN_UNDEF;
5199 /* If the symbol is weak, we do need to clear the value.
5200 Otherwise, the PLT entry would provide a definition for
5201 the symbol even if the symbol wasn't defined anywhere,
5202 and so the symbol would never be NULL. */
5203 if (!h->ref_regular_nonweak)
5204 sym->st_value = 0;
5205 }
5206 }
5207
1c2de463 5208 use_plt = (eh->got_types_used == CALL_USED
36591ba1
SL		 5209 && h->plt.offset != (bfd_vma) -1);
5210
5211 if (!use_plt && h->got.offset != (bfd_vma) -1
5212 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
5213 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
5214 {
5215 asection *sgot;
5216 asection *srela;
5217 Elf_Internal_Rela rela;
5218 bfd_byte *loc;
5219 bfd_vma offset;
5220
5221 /* This symbol has an entry in the global offset table. Set it
5222 up. */
5223 sgot = htab->root.sgot;
5224 srela = htab->root.srelgot;
5225 BFD_ASSERT (sgot != NULL && srela != NULL);
5226
5227 offset = (h->got.offset & ~(bfd_vma) 1);
5228 rela.r_offset = (sgot->output_section->vma
5229 + sgot->output_offset + offset);
5230
5231 /* If this is a -Bsymbolic link, and the symbol is defined
5232 locally, we just want to emit a RELATIVE reloc. Likewise if
5233 the symbol was forced to be local because of a version file.
5234 The entry in the global offset table will already have been
5235 initialized in the relocate_section function. */
5236
0e1862bb 5237 if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
36591ba1
SL		 5238 {
5239 rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
5240 rela.r_addend = bfd_get_signed_32 (output_bfd,
5241 (sgot->contents + offset));
5242 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
5243 }
5244 else
5245 {
5246 bfd_put_32 (output_bfd, (bfd_vma) 0,
5247 sgot->contents + offset);
5248 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT);
5249 rela.r_addend = 0;
5250 }
5251
5252 loc = srela->contents;
5253 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5254 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5255 }
5256
5257 if (use_plt && h->got.offset != (bfd_vma) -1)
5258 {
5259 bfd_vma offset = (h->got.offset & ~(bfd_vma) 1);
5260 asection *sgot = htab->root.sgot;
5261 asection *splt = htab->root.splt;
5262 bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset
5263 + h->plt.offset),
5264 sgot->contents + offset);
5265 }
5266
5267 if (h->needs_copy)
5268 {
5269 asection *s;
5270 Elf_Internal_Rela rela;
5271 bfd_byte *loc;
5272
5273 /* This symbol needs a copy reloc. Set it up. */
5274 BFD_ASSERT (h->dynindx != -1
5275 && (h->root.type == bfd_link_hash_defined
5276 || h->root.type == bfd_link_hash_defweak));
5277
36591ba1
SL		 5278 rela.r_offset = (h->root.u.def.value
5279 + h->root.u.def.section->output_section->vma
5280 + h->root.u.def.section->output_offset);
5281 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY);
5282 rela.r_addend = 0;
afbf7e8e 5283 if (h->root.u.def.section == htab->root.sdynrelro)
5474d94f
AM		 5284 s = htab->root.sreldynrelro;
5285 else
5286 s = htab->root.srelbss;
5287 BFD_ASSERT (s != NULL);
36591ba1
SL		 5288 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5289 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5290 }
5291
82e91538 5292 /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */
36591ba1 5293 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
82e91538
SL		 5294 || h == elf_hash_table (info)->hgot
5295 || h == elf32_nios2_hash_table (info)->h_gp_got)
36591ba1
SL		 5296 sym->st_shndx = SHN_ABS;
5297
5298 return TRUE;
5299}
5300
5301/* Implement elf_backend_finish_dynamic_sections. */
5302static bfd_boolean
5303nios2_elf32_finish_dynamic_sections (bfd *output_bfd,
5304 struct bfd_link_info *info)
5305{
5306 bfd *dynobj;
5307 asection *sgotplt;
5308 asection *sdyn;
5309 struct elf32_nios2_link_hash_table *htab;
5310
5311 htab = elf32_nios2_hash_table (info);
5312 dynobj = elf_hash_table (info)->dynobj;
5313 sgotplt = htab->root.sgotplt;
5314 BFD_ASSERT (sgotplt != NULL);
5315 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5316
5317 if (elf_hash_table (info)->dynamic_sections_created)
5318 {
5319 asection *splt;
5320 Elf32_External_Dyn *dyncon, *dynconend;
5321
5322 splt = htab->root.splt;
5323 BFD_ASSERT (splt != NULL && sdyn != NULL);
5324
5325 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5326 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5327 for (; dyncon < dynconend; dyncon++)
5328 {
5329 Elf_Internal_Dyn dyn;
5330 asection *s;
5331
5332 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5333
5334 switch (dyn.d_tag)
5335 {
5336 default:
5337 break;
5338
5339 case DT_PLTGOT:
4ade44b7
AM		 5340 s = htab->root.sgotplt;
5341 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
36591ba1
SL		 5342 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5343 break;
5344
5345 case DT_JMPREL:
5346 s = htab->root.srelplt;
4ade44b7 5347 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
36591ba1
SL		 5348 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5349 break;
5350
5351 case DT_PLTRELSZ:
5352 s = htab->root.srelplt;
36591ba1
SL		 5353 dyn.d_un.d_val = s->size;
5354 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5355 break;
5356
36591ba1 5357 case DT_NIOS2_GP:
4ade44b7
AM		 5358 s = htab->root.sgotplt;
5359 dyn.d_un.d_ptr
5360 = s->output_section->vma + s->output_offset + 0x7ff0;
36591ba1
SL		 5361 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5362 break;
5363 }
5364 }
5365
5366 /* Fill in the first entry in the procedure linkage table. */
5367 if (splt->size > 0)
5368 {
5369 bfd_vma got_address = (sgotplt->output_section->vma
5370 + sgotplt->output_offset);
0e1862bb 5371 if (bfd_link_pic (info))
36591ba1 5372 {
33d4099f
SL		 5373 bfd_vma got_pcrel = got_address - (splt->output_section->vma
5374 + splt->output_offset);
5375 /* Both GOT and PLT must be aligned to a 16-byte boundary
5376 for the two loads to share the %hiadj part. The 4-byte
5377 offset for nextpc is accounted for in the %lo offsets
5378 on the loads. */
5379 BFD_ASSERT ((got_pcrel & 0xf) == 0);
36591ba1 5380 nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6);
33d4099f
SL		 5381 nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel));
5382 nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff);
5383 nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff);
36591ba1
SL		 5384 }
5385 else
5386 {
5387 /* Divide by 4 here, not 3 because we already corrected for the
5388 res_N branches. */
5389 bfd_vma res_size = (splt->size - 28) / 4;
5390 bfd_vma res_start = (splt->output_section->vma
5391 + splt->output_offset);
5392 bfd_vma res_offset;
5393
5394 for (res_offset = 0; res_offset < res_size; res_offset += 4)
5395 bfd_put_32 (output_bfd,
5396 6 | ((res_size - (res_offset + 4)) << 6),
5397 splt->contents + res_offset);
5398
33d4099f
SL		 5399 /* The GOT must be aligned to a 16-byte boundary for the
5400 two loads to share the same %hiadj part. */
5401 BFD_ASSERT ((got_address & 0xf) == 0);
5402
36591ba1
SL		 5403 nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7);
5404 nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start));
5405 nios2_elf32_install_imm16 (splt, res_size + 4,
5406 res_start & 0xffff);
5407 nios2_elf32_install_imm16 (splt, res_size + 12,
5408 hiadj (got_address));
5409 nios2_elf32_install_imm16 (splt, res_size + 16,
33d4099f 5410 (got_address + 4) & 0xffff);
36591ba1 5411 nios2_elf32_install_imm16 (splt, res_size + 20,
33d4099f 5412 (got_address + 8) & 0xffff);
36591ba1
SL		 5413 }
5414 }
5415 }
5416 /* Fill in the first three entries in the global offset table. */
5417 if (sgotplt->size > 0)
5418 {
5419 if (sdyn == NULL)
5420 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents);
5421 else
5422 bfd_put_32 (output_bfd,
5423 sdyn->output_section->vma + sdyn->output_offset,
5424 sgotplt->contents);
5425 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4);
5426 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8);
5427 }
5428
5429 elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4;
5430
5431 return TRUE;
5432}
5433
5434/* Implement elf_backend_adjust_dynamic_symbol:
5435 Adjust a symbol defined by a dynamic object and referenced by a
5436 regular object. The current definition is in some section of the
5437 dynamic object, but we're not including those sections. We have to
5438 change the definition to something the rest of the link can
5439 understand. */
5440static bfd_boolean
5441nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info,
5442 struct elf_link_hash_entry *h)
5443{
5444 struct elf32_nios2_link_hash_table *htab;
5445 bfd *dynobj;
5474d94f 5446 asection *s, *srel;
36591ba1
SL		 5447 unsigned align2;
5448
5449 htab = elf32_nios2_hash_table (info);
5450 dynobj = elf_hash_table (info)->dynobj;
5451
5452 /* Make sure we know what is going on here. */
5453 BFD_ASSERT (dynobj != NULL
5454 && (h->needs_plt
5455 || h->u.weakdef != NULL
5456 || (h->def_dynamic
5457 && h->ref_regular
5458 && !h->def_regular)));
5459
5460 /* If this is a function, put it in the procedure linkage table. We
5461 will fill in the contents of the procedure linkage table later,
5462 when we know the address of the .got section. */
5463 if (h->type == STT_FUNC || h->needs_plt)
5464 {
5465 if (h->plt.refcount <= 0
5466 || SYMBOL_CALLS_LOCAL (info, h)
5467 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5468 && h->root.type == bfd_link_hash_undefweak))
5469 {
5470 /* This case can occur if we saw a PLT reloc in an input
5471 file, but the symbol was never referred to by a dynamic
5472 object, or if all references were garbage collected. In
5473 such a case, we don't actually need to build a procedure
5474 linkage table, and we can just do a PCREL reloc instead. */
5475 h->plt.offset = (bfd_vma) -1;
5476 h->needs_plt = 0;
5477 }
5478
5479 return TRUE;
5480 }
5481
5482 /* Reinitialize the plt offset now that it is not used as a reference
5483 count any more. */
5484 h->plt.offset = (bfd_vma) -1;
5485
5486 /* If this is a weak symbol, and there is a real definition, the
5487 processor independent code will have arranged for us to see the
5488 real definition first, and we can just use the same value. */
5489 if (h->u.weakdef != NULL)
5490 {
5491 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5492 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5493 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5494 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5495 return TRUE;
5496 }
5497
5498 /* If there are no non-GOT references, we do not need a copy
5499 relocation. */
5500 if (!h->non_got_ref)
5501 return TRUE;
5502
5503 /* This is a reference to a symbol defined by a dynamic object which
5504 is not a function.
5505 If we are creating a shared library, we must presume that the
5506 only references to the symbol are via the global offset table.
5507 For such cases we need not do anything here; the relocations will
5508 be handled correctly by relocate_section. */
0e1862bb 5509 if (bfd_link_pic (info))
36591ba1
SL		 5510 return TRUE;
5511
5512 if (h->size == 0)
5513 {
4eca0228
AM		 5514 _bfd_error_handler (_("dynamic variable `%s' is zero size"),
5515 h->root.root.string);
36591ba1
SL		 5516 return TRUE;
5517 }
5518
5519 /* We must allocate the symbol in our .dynbss section, which will
5520 become part of the .bss section of the executable. There will be
5521 an entry for this symbol in the .dynsym section. The dynamic
5522 object will contain position independent code, so all references
5523 from the dynamic object to this symbol will go through the global
5524 offset table. The dynamic linker will use the .dynsym entry to
5525 determine the address it must put in the global offset table, so
5526 both the dynamic object and the regular object will refer to the
5527 same memory location for the variable. */
36591ba1
SL		 5528 /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to
5529 copy the initial value out of the dynamic object and into the
5530 runtime process image. We need to remember the offset into the
5531 .rela.bss section we are going to use. */
5474d94f 5532 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
36591ba1 5533 {
5474d94f
AM		 5534 s = htab->root.sdynrelro;
5535 srel = htab->root.sreldynrelro;
5536 }
5537 else
5538 {
5539 s = htab->root.sdynbss;
9d19e4fd 5540 srel = htab->root.srelbss;
5474d94f
AM		 5541 }
5542 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5543 {
36591ba1
SL		 5544 srel->size += sizeof (Elf32_External_Rela);
5545 h->needs_copy = 1;
5546 }
5547
5548 align2 = bfd_log2 (h->size);
5549 if (align2 > h->root.u.def.section->alignment_power)
5550 align2 = h->root.u.def.section->alignment_power;
5551
5552 /* Align dynbss. */
5553 s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2);
5554 if (align2 > bfd_get_section_alignment (dynobj, s)
5555 && !bfd_set_section_alignment (dynobj, s, align2))
5556 return FALSE;
5557
5558 /* Define the symbol as being at this point in the section. */
5559 h->root.u.def.section = s;
5560 h->root.u.def.value = s->size;
5561
5562 /* Increment the section size to make room for the symbol. */
5563 s->size += h->size;
5564
5565 return TRUE;
5566}
5567
5568/* Worker function for nios2_elf32_size_dynamic_sections. */
5569static bfd_boolean
5570adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5571{
5572 struct bfd_link_info *info;
5573 struct elf32_nios2_link_hash_table *htab;
5574
5575 if (h->root.type == bfd_link_hash_indirect)
5576 return TRUE;
5577
5578 if (h->root.type == bfd_link_hash_warning)
5579 /* When warning symbols are created, they **replace** the "real"
5580 entry in the hash table, thus we never get to see the real
5581 symbol in a hash traversal. So look at it now. */
5582 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5583
5584 info = (struct bfd_link_info *) inf;
5585 htab = elf32_nios2_hash_table (info);
5586
5587 if (h->plt.offset != (bfd_vma)-1)
5588 h->plt.offset += htab->res_n_size;
5589 if (htab->root.splt == h->root.u.def.section)
5590 h->root.u.def.value += htab->res_n_size;
5591
5592 return TRUE;
5593}
5594
5595/* Another worker function for nios2_elf32_size_dynamic_sections.
5596 Allocate space in .plt, .got and associated reloc sections for
5597 dynamic relocs. */
5598static bfd_boolean
5599allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5600{
5601 struct bfd_link_info *info;
5602 struct elf32_nios2_link_hash_table *htab;
5603 struct elf32_nios2_link_hash_entry *eh;
5604 struct elf32_nios2_dyn_relocs *p;
5605 int use_plt;
5606
5607 if (h->root.type == bfd_link_hash_indirect)
5608 return TRUE;
5609
5610 if (h->root.type == bfd_link_hash_warning)
5611 /* When warning symbols are created, they **replace** the "real"
5612 entry in the hash table, thus we never get to see the real
5613 symbol in a hash traversal. So look at it now. */
5614 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5615
5616 info = (struct bfd_link_info *) inf;
5617 htab = elf32_nios2_hash_table (info);
5618
5619 if (htab->root.dynamic_sections_created
5620 && h->plt.refcount > 0)
5621 {
5622 /* Make sure this symbol is output as a dynamic symbol.
5623 Undefined weak syms won't yet be marked as dynamic. */
5624 if (h->dynindx == -1
5625 && !h->forced_local
5626 && !bfd_elf_link_record_dynamic_symbol (info, h))
5627 return FALSE;
5628
0e1862bb 5629 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
36591ba1
SL		 5630 {
5631 asection *s = htab->root.splt;
5632
5633 /* Allocate room for the header. */
5634 if (s->size == 0)
5635 {
0e1862bb 5636 if (bfd_link_pic (info))
36591ba1
SL		 5637 s->size = 24;
5638 else
5639 s->size = 28;
5640 }
5641
5642 h->plt.offset = s->size;
5643
5644 /* If this symbol is not defined in a regular file, and we are
5645 not generating a shared library, then set the symbol to this
5646 location in the .plt. This is required to make function
5647 pointers compare as equal between the normal executable and
5648 the shared library. */
0e1862bb 5649 if (! bfd_link_pic (info)
36591ba1
SL		 5650 && !h->def_regular)
5651 {
5652 h->root.u.def.section = s;
5653 h->root.u.def.value = h->plt.offset;
5654 }
5655
5656 /* Make room for this entry. */
5657 s->size += 12;
5658
5659 /* We also need to make an entry in the .rela.plt section. */
5660 htab->root.srelplt->size += sizeof (Elf32_External_Rela);
5661
5662 /* And the .got.plt section. */
5663 htab->root.sgotplt->size += 4;
5664 }
5665 else
5666 {
5667 h->plt.offset = (bfd_vma) -1;
5668 h->needs_plt = 0;
5669 }
5670 }
5671 else
5672 {
5673 h->plt.offset = (bfd_vma) -1;
5674 h->needs_plt = 0;
5675 }
5676
5677 eh = (struct elf32_nios2_link_hash_entry *) h;
1c2de463 5678 use_plt = (eh->got_types_used == CALL_USED
36591ba1
SL		 5679 && h->plt.offset != (bfd_vma) -1);
5680
5681 if (h->got.refcount > 0)
5682 {
5683 asection *s;
5684 bfd_boolean dyn;
5685 int tls_type = eh->tls_type;
5686 int indx;
5687
5688 /* Make sure this symbol is output as a dynamic symbol.
5689 Undefined weak syms won't yet be marked as dynamic. */
5690 if (h->dynindx == -1
5691 && !h->forced_local
5692 && !bfd_elf_link_record_dynamic_symbol (info, h))
5693 return FALSE;
5694
5695 s = htab->root.sgot;
5696 h->got.offset = s->size;
5697
5698 if (tls_type == GOT_UNKNOWN)
5699 abort ();
5700
5701 if (tls_type == GOT_NORMAL)
5702 /* Non-TLS symbols need one GOT slot. */
5703 s->size += 4;
5704 else
5705 {
5706 if (tls_type & GOT_TLS_GD)
5707 /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */
5708 s->size += 8;
5709 if (tls_type & GOT_TLS_IE)
5710 /* R_NIOS2_TLS_IE16 needs one GOT slot. */
5711 s->size += 4;
5712 }
5713
5714 dyn = htab->root.dynamic_sections_created;
5715
5716 indx = 0;
0e1862bb
L		 5717 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
5718 && (!bfd_link_pic (info)
36591ba1
SL		 5719 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5720 indx = h->dynindx;
5721
5722 if (tls_type != GOT_NORMAL
0e1862bb 5723 && (bfd_link_pic (info) || indx != 0)
36591ba1
SL		 5724 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5725 || h->root.type != bfd_link_hash_undefweak))
5726 {
5727 if (tls_type & GOT_TLS_IE)
5728 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5729
5730 if (tls_type & GOT_TLS_GD)
5731 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5732
5733 if ((tls_type & GOT_TLS_GD) && indx != 0)
5734 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5735 }
5736 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5737 || h->root.type != bfd_link_hash_undefweak)
5738 && !use_plt
0e1862bb 5739 && (bfd_link_pic (info)
36591ba1
SL		 5740 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5741 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5742 }
5743 else
5744 h->got.offset = (bfd_vma) -1;
5745
5746 if (eh->dyn_relocs == NULL)
5747 return TRUE;
5748
5749 /* In the shared -Bsymbolic case, discard space allocated for
5750 dynamic pc-relative relocs against symbols which turn out to be
5751 defined in regular objects. For the normal shared case, discard
5752 space for pc-relative relocs that have become local due to symbol
5753 visibility changes. */
5754
0e1862bb 5755 if (bfd_link_pic (info))
36591ba1
SL		 5756 {
5757 if (h->def_regular
a496fbc8 5758 && (h->forced_local || SYMBOLIC_BIND (info, h)))
36591ba1
SL		 5759 {
5760 struct elf32_nios2_dyn_relocs **pp;
5761
5762 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5763 {
5764 p->count -= p->pc_count;
5765 p->pc_count = 0;
5766 if (p->count == 0)
5767 *pp = p->next;
5768 else
5769 pp = &p->next;
5770 }
5771 }
5772
5773 /* Also discard relocs on undefined weak syms with non-default
5774 visibility. */
5775 if (eh->dyn_relocs != NULL
5776 && h->root.type == bfd_link_hash_undefweak)
5777 {
5778 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5779 eh->dyn_relocs = NULL;
5780
5781 /* Make sure undefined weak symbols are output as a dynamic
5782 symbol in PIEs. */
5783 else if (h->dynindx == -1
5784 && !h->forced_local
5785 && !bfd_elf_link_record_dynamic_symbol (info, h))
5786 return FALSE;
5787 }
5788 }
5789 else
5790 {
5791 /* For the non-shared case, discard space for relocs against
5792 symbols which turn out to need copy relocs or are not
5793 dynamic. */
5794
5795 if (!h->non_got_ref
5796 && ((h->def_dynamic && !h->def_regular)
5797 || (htab->root.dynamic_sections_created
5798 && (h->root.type == bfd_link_hash_undefweak
5799 || h->root.type == bfd_link_hash_undefined))))
5800 {
5801 /* Make sure this symbol is output as a dynamic symbol.
5802 Undefined weak syms won't yet be marked as dynamic. */
5803 if (h->dynindx == -1
5804 && !h->forced_local
5805 && !bfd_elf_link_record_dynamic_symbol (info, h))
5806 return FALSE;
5807
5808 /* If that succeeded, we know we'll be keeping all the
5809 relocs. */
5810 if (h->dynindx != -1)
5811 goto keep;
5812 }
5813
5814 eh->dyn_relocs = NULL;
5815
5816 keep: ;
5817 }
5818
5819 /* Finally, allocate space. */
5820 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5821 {
5822 asection *sreloc = elf_section_data (p->sec)->sreloc;
5823 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5824 }
5825
5826 return TRUE;
5827}
5828
5829/* Implement elf_backend_size_dynamic_sections:
5830 Set the sizes of the dynamic sections. */
5831static bfd_boolean
5832nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5833 struct bfd_link_info *info)
5834{
5835 bfd *dynobj;
5836 asection *s;
5837 bfd_boolean plt;
5838 bfd_boolean got;
5839 bfd_boolean relocs;
5840 bfd *ibfd;
5841 struct elf32_nios2_link_hash_table *htab;
5842
5843 htab = elf32_nios2_hash_table (info);
5844 dynobj = elf_hash_table (info)->dynobj;
5845 BFD_ASSERT (dynobj != NULL);
5846
5847 htab->res_n_size = 0;
5848 if (elf_hash_table (info)->dynamic_sections_created)
5849 {
5850 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 5851 if (bfd_link_executable (info) && !info->nointerp)
36591ba1
SL		 5852 {
5853 s = bfd_get_linker_section (dynobj, ".interp");
5854 BFD_ASSERT (s != NULL);
5855 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5856 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5857 }
5858 }
5859 else
5860 {
5861 /* We may have created entries in the .rela.got section.
5862 However, if we are not creating the dynamic sections, we will
5863 not actually use these entries. Reset the size of .rela.got,
5864 which will cause it to get stripped from the output file
5865 below. */
5866 s = htab->root.srelgot;
5867 if (s != NULL)
5868 s->size = 0;
5869 }
5870
5871 /* Set up .got offsets for local syms, and space for local dynamic
5872 relocs. */
c72f2fb2 5873 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
36591ba1
SL		 5874 {
5875 bfd_signed_vma *local_got;
5876 bfd_signed_vma *end_local_got;
5877 char *local_tls_type;
5878 bfd_size_type locsymcount;
5879 Elf_Internal_Shdr *symtab_hdr;
5880 asection *srel;
5881
5882 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5883 continue;
5884
5885 for (s = ibfd->sections; s != NULL; s = s->next)
5886 {
5887 struct elf32_nios2_dyn_relocs *p;
5888
5889 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
5890 {
5891 if (!bfd_is_abs_section (p->sec)
5892 && bfd_is_abs_section (p->sec->output_section))
5893 {
5894 /* Input section has been discarded, either because
5895 it is a copy of a linkonce section or due to
5896 linker script /DISCARD/, so we'll be discarding
5897 the relocs too. */
5898 }
5899 else if (p->count != 0)
5900 {
5901 srel = elf_section_data (p->sec)->sreloc;
5902 srel->size += p->count * sizeof (Elf32_External_Rela);
5903 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5904 info->flags |= DF_TEXTREL;
5905 }
5906 }
5907 }
5908
5909 local_got = elf_local_got_refcounts (ibfd);
5910 if (!local_got)
5911 continue;
5912
5913 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5914 locsymcount = symtab_hdr->sh_info;
5915 end_local_got = local_got + locsymcount;
5916 local_tls_type = elf32_nios2_local_got_tls_type (ibfd);
5917 s = htab->root.sgot;
5918 srel = htab->root.srelgot;
5919 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5920 {
5921 if (*local_got > 0)
5922 {
5923 *local_got = s->size;
5924 if (*local_tls_type & GOT_TLS_GD)
5925 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5926 s->size += 8;
5927 if (*local_tls_type & GOT_TLS_IE)
5928 s->size += 4;
5929 if (*local_tls_type == GOT_NORMAL)
5930 s->size += 4;
5931
0e1862bb 5932 if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD)
36591ba1
SL		 5933 srel->size += sizeof (Elf32_External_Rela);
5934 }
5935 else
5936 *local_got = (bfd_vma) -1;
5937 }
5938 }
5939
5940 if (htab->tls_ldm_got.refcount > 0)
5941 {
5942 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5943 for R_NIOS2_TLS_LDM16 relocations. */
5944 htab->tls_ldm_got.offset = htab->root.sgot->size;
5945 htab->root.sgot->size += 8;
0e1862bb 5946 if (bfd_link_pic (info))
36591ba1
SL		 5947 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5948 }
5949 else
5950 htab->tls_ldm_got.offset = -1;
5951
5952 /* Allocate global sym .plt and .got entries, and space for global
5953 sym dynamic relocs. */
5954 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5955
82e91538
SL		 5956 if (elf_hash_table (info)->dynamic_sections_created)
5957 {
5958 /* If the .got section is more than 0x8000 bytes, we add
5959 0x8000 to the value of _gp_got, so that 16-bit relocations
5960 have a greater chance of working. */
5961 if (htab->root.sgot->size >= 0x8000
5962 && elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value == 0)
5963 elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value = 0x8000;
5964 }
5965
36591ba1
SL		 5966 /* The check_relocs and adjust_dynamic_symbol entry points have
5967 determined the sizes of the various dynamic sections. Allocate
5968 memory for them. */
5969 plt = FALSE;
5970 got = FALSE;
5971 relocs = FALSE;
5972 for (s = dynobj->sections; s != NULL; s = s->next)
5973 {
5974 const char *name;
5975
5976 if ((s->flags & SEC_LINKER_CREATED) == 0)
5977 continue;
5978
5979 /* It's OK to base decisions on the section name, because none
5980 of the dynobj section names depend upon the input files. */
5981 name = bfd_get_section_name (dynobj, s);
5982
5474d94f 5983 if (s == htab->root.splt)
36591ba1
SL		 5984 {
5985 /* Remember whether there is a PLT. */
5986 plt = s->size != 0;
5987
5988 /* Correct for the number of res_N branches. */
0e1862bb 5989 if (plt && !bfd_link_pic (info))
36591ba1
SL		 5990 {
5991 htab->res_n_size = (s->size-28) / 3;
5992 s->size += htab->res_n_size;
5993 }
5994 }
5995 else if (CONST_STRNEQ (name, ".rela"))
5996 {
5997 if (s->size != 0)
5998 {
5999 relocs = TRUE;
6000
6001 /* We use the reloc_count field as a counter if we need
6002 to copy relocs into the output file. */
6003 s->reloc_count = 0;
6004 }
6005 }
5474d94f
AM		 6006 else if (s == htab->root.sgot
6007 || s == htab->root.sgotplt)
6008 {
6009 if (s->size != 0)
6010 got = TRUE;
6011 }
6012 else if (s != htab->root.sdynbss
6013 && s != htab->root.sdynrelro)
36591ba1
SL		 6014 /* It's not one of our sections, so don't allocate space. */
6015 continue;
6016
6017 if (s->size == 0)
6018 {
6019 /* If we don't need this section, strip it from the
6020 output file. This is mostly to handle .rela.bss and
6021 .rela.plt. We must create both sections in
6022 create_dynamic_sections, because they must be created
6023 before the linker maps input sections to output
6024 sections. The linker does that before
6025 adjust_dynamic_symbol is called, and it is that
6026 function which decides whether anything needs to go
6027 into these sections. */
6028 s->flags |= SEC_EXCLUDE;
6029 continue;
6030 }
6031
6032 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6033 continue;
6034
6035 /* Allocate memory for the section contents. */
6036 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
6037 Unused entries should be reclaimed before the section's contents
6038 are written out, but at the moment this does not happen. Thus in
6039 order to prevent writing out garbage, we initialize the section's
6040 contents to zero. */
6041 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
6042 if (s->contents == NULL)
6043 return FALSE;
6044 }
6045
6046 /* Adjust dynamic symbols that point to the plt to account for the
6047 now-known number of resN slots. */
6048 if (htab->res_n_size)
6049 elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info);
6050
6051 if (elf_hash_table (info)->dynamic_sections_created)
6052 {
6053 /* Add some entries to the .dynamic section. We fill in the
6054 values later, in elf_nios2_finish_dynamic_sections, but we
6055 must add the entries now so that we get the correct size for
6056 the .dynamic section. The DT_DEBUG entry is filled in by the
6057 dynamic linker and used by the debugger. */
6058#define add_dynamic_entry(TAG, VAL) \
6059 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6060
0e1862bb 6061 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_DEBUG, 0))
36591ba1
SL		 6062 return FALSE;
6063
6064 if (got && !add_dynamic_entry (DT_PLTGOT, 0))
6065 return FALSE;
6066
6067 if (plt
6068 && (!add_dynamic_entry (DT_PLTRELSZ, 0)
6069 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6070 || !add_dynamic_entry (DT_JMPREL, 0)))
6071 return FALSE;
6072
6073 if (relocs
6074 && (!add_dynamic_entry (DT_RELA, 0)
6075 || !add_dynamic_entry (DT_RELASZ, 0)
6076 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))))
6077 return FALSE;
6078
0e1862bb 6079 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_NIOS2_GP, 0))
36591ba1
SL		 6080 return FALSE;
6081
6082 if ((info->flags & DF_TEXTREL) != 0
6083 && !add_dynamic_entry (DT_TEXTREL, 0))
6084 return FALSE;
6085 }
6086#undef add_dynamic_entry
6087
6088 return TRUE;
6089}
6090
68faa637
AM		 6091/* Free the derived linker hash table. */
6092static void
d495ab0d 6093nios2_elf32_link_hash_table_free (bfd *obfd)
68faa637
AM		 6094{
6095 struct elf32_nios2_link_hash_table *htab
d495ab0d 6096 = (struct elf32_nios2_link_hash_table *) obfd->link.hash;
68faa637
AM		 6097
6098 bfd_hash_table_free (&htab->bstab);
d495ab0d 6099 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 6100}
6101
36591ba1
SL		 6102/* Implement bfd_elf32_bfd_link_hash_table_create. */
6103static struct bfd_link_hash_table *
6104nios2_elf32_link_hash_table_create (bfd *abfd)
6105{
6106 struct elf32_nios2_link_hash_table *ret;
6107 bfd_size_type amt = sizeof (struct elf32_nios2_link_hash_table);
6108
7bf52ea2 6109 ret = bfd_zmalloc (amt);
36591ba1
SL		 6110 if (ret == NULL)
6111 return NULL;
6112
6113 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
6114 link_hash_newfunc,
6115 sizeof (struct
6116 elf32_nios2_link_hash_entry),
6117 NIOS2_ELF_DATA))
6118 {
6119 free (ret);
6120 return NULL;
6121 }
6122
78058a5e
SL		 6123 /* Init the stub hash table too. */
6124 if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc,
6125 sizeof (struct elf32_nios2_stub_hash_entry)))
d495ab0d
AM		 6126 {
6127 _bfd_elf_link_hash_table_free (abfd);
6128 return NULL;
6129 }
6130 ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free;
78058a5e 6131
36591ba1
SL		 6132 return &ret->root.root;
6133}
6134
6135/* Implement elf_backend_reloc_type_class. */
6136static enum elf_reloc_type_class
7e612e98
AM		 6137nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6138 const asection *rel_sec ATTRIBUTE_UNUSED,
6139 const Elf_Internal_Rela *rela)
36591ba1
SL		 6140{
6141 switch ((int) ELF32_R_TYPE (rela->r_info))
6142 {
6143 case R_NIOS2_RELATIVE:
6144 return reloc_class_relative;
6145 case R_NIOS2_JUMP_SLOT:
6146 return reloc_class_plt;
6147 case R_NIOS2_COPY:
6148 return reloc_class_copy;
6149 default:
6150 return reloc_class_normal;
6151 }
6152}
6153
6154/* Return 1 if target is one of ours. */
6155static bfd_boolean
6156is_nios2_elf_target (const struct bfd_target *targ)
6157{
6d00b590
AM		 6158 return (targ == &nios2_elf32_le_vec
6159 || targ == &nios2_elf32_be_vec);
36591ba1
SL		 6160}
6161
6162/* Implement elf_backend_add_symbol_hook.
6163 This hook is called by the linker when adding symbols from an object
6164 file. We use it to put .comm items in .sbss, and not .bss. */
6165static bfd_boolean
6166nios2_elf_add_symbol_hook (bfd *abfd,
6167 struct bfd_link_info *info,
6168 Elf_Internal_Sym *sym,
6169 const char **namep ATTRIBUTE_UNUSED,
6170 flagword *flagsp ATTRIBUTE_UNUSED,
6171 asection **secp,
6172 bfd_vma *valp)
6173{
6174 bfd *dynobj;
6175
6176 if (sym->st_shndx == SHN_COMMON
0e1862bb 6177 && !bfd_link_relocatable (info)
36591ba1
SL		 6178 && sym->st_size <= elf_gp_size (abfd)
6179 && is_nios2_elf_target (info->output_bfd->xvec))
6180 {
6181 /* Common symbols less than or equal to -G nn bytes are automatically
6182 put into .sbss. */
6183 struct elf32_nios2_link_hash_table *htab;
6184
6185 htab = elf32_nios2_hash_table (info);
6186 if (htab->sbss == NULL)
6187 {
6188 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
6189
6190 dynobj = elf_hash_table (info)->dynobj;
6191 if (!dynobj)
6192 dynobj = abfd;
6193
6194 htab->sbss = bfd_make_section_anyway_with_flags (dynobj, ".sbss",
6195 flags);
6196 if (htab->sbss == NULL)
6197 return FALSE;
6198 }
6199
6200 *secp = htab->sbss;
6201 *valp = sym->st_size;
6202 }
6203
6204 return TRUE;
6205}
6206
6207/* Implement elf_backend_can_make_relative_eh_frame:
6208 Decide whether to attempt to turn absptr or lsda encodings in
6209 shared libraries into pcrel within the given input section. */
6210static bfd_boolean
6211nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED,
6212 struct bfd_link_info *info
6213 ATTRIBUTE_UNUSED,
6214 asection *eh_frame_section
6215 ATTRIBUTE_UNUSED)
6216{
6217 /* We can't use PC-relative encodings in the .eh_frame section. */
6218 return FALSE;
6219}
6220
6221/* Implement elf_backend_special_sections. */
6222const struct bfd_elf_special_section elf32_nios2_special_sections[] =
6223{
6224 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS,
6225 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6226 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS,
6227 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6228 { NULL, 0, 0, 0, 0 }
6229};
6230
6231#define ELF_ARCH bfd_arch_nios2
6232#define ELF_TARGET_ID NIOS2_ELF_DATA
6233#define ELF_MACHINE_CODE EM_ALTERA_NIOS2
6234
6235/* The Nios II MMU uses a 4K page size. */
6236
6237#define ELF_MAXPAGESIZE 0x1000
6238
6239#define bfd_elf32_bfd_link_hash_table_create \
6240 nios2_elf32_link_hash_table_create
6241
965b1d80
SL		 6242#define bfd_elf32_bfd_merge_private_bfd_data \
6243 nios2_elf32_merge_private_bfd_data
6244
36591ba1
SL		 6245/* Relocation table lookup macros. */
6246
6247#define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup
6248#define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup
6249
6250/* JUMP_TABLE_LINK macros. */
6251
6252/* elf_info_to_howto (using RELA relocations). */
6253
6254#define elf_info_to_howto nios2_elf32_info_to_howto
6255
6256/* elf backend functions. */
6257
6258#define elf_backend_can_gc_sections 1
6259#define elf_backend_can_refcount 1
6260#define elf_backend_plt_readonly 1
6261#define elf_backend_want_got_plt 1
5474d94f 6262#define elf_backend_want_dynrelro 1
36591ba1 6263#define elf_backend_rela_normal 1
64f52338 6264#define elf_backend_dtrel_excludes_plt 1
36591ba1
SL		 6265
6266#define elf_backend_relocate_section nios2_elf32_relocate_section
6267#define elf_backend_section_flags nios2_elf32_section_flags
6268#define elf_backend_fake_sections nios2_elf32_fake_sections
6269#define elf_backend_check_relocs nios2_elf32_check_relocs
6270
6271#define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook
6272#define elf_backend_gc_sweep_hook nios2_elf32_gc_sweep_hook
6273#define elf_backend_create_dynamic_sections \
6274 nios2_elf32_create_dynamic_sections
6275#define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol
6276#define elf_backend_finish_dynamic_sections \
6277 nios2_elf32_finish_dynamic_sections
6278#define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol
6279#define elf_backend_reloc_type_class nios2_elf32_reloc_type_class
6280#define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections
6281#define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook
6282#define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol
965b1d80 6283#define elf_backend_object_p nios2_elf32_object_p
36591ba1
SL		 6284
6285#define elf_backend_grok_prstatus nios2_grok_prstatus
6286#define elf_backend_grok_psinfo nios2_grok_psinfo
6287
6288#undef elf_backend_can_make_relative_eh_frame
6289#define elf_backend_can_make_relative_eh_frame \
6290 nios2_elf32_can_make_relative_eh_frame
6291
6292#define elf_backend_special_sections elf32_nios2_special_sections
6293
6d00b590 6294#define TARGET_LITTLE_SYM nios2_elf32_le_vec
36591ba1 6295#define TARGET_LITTLE_NAME "elf32-littlenios2"
6d00b590 6296#define TARGET_BIG_SYM nios2_elf32_be_vec
36591ba1
SL		 6297#define TARGET_BIG_NAME "elf32-bignios2"
6298
6299#define elf_backend_got_header_size 12
03d5b773 6300#define elf_backend_default_execstack 0
36591ba1
SL		 6301
6302#include "elf32-target.h"
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