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[thirdparty/binutils-gdb.git] / bfd / elf32-nios2.c
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36591ba1 1/* 32-bit ELF support for Nios II.
250d07de 2 Copyright (C) 2012-2021 Free Software Foundation, Inc.
36591ba1
SL		 3 Contributed by Nigel Gray (ngray@altera.com).
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"
f3185997 34#include "libiberty.h"
36591ba1
SL		 35
36/* Use RELA relocations. */
37#ifndef USE_RELA
38#define USE_RELA
39#endif
40
41#ifdef USE_REL
42#undef USE_REL
43#endif
44
45/* Forward declarations. */
46static bfd_reloc_status_type nios2_elf32_ignore_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48static bfd_reloc_status_type nios2_elf32_hi16_relocate
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50static bfd_reloc_status_type nios2_elf32_lo16_relocate
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52static bfd_reloc_status_type nios2_elf32_hiadj16_relocate
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate
57 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
58static bfd_reloc_status_type nios2_elf32_pcrel16_relocate
59 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
60static bfd_reloc_status_type nios2_elf32_call26_relocate
61 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
62static bfd_reloc_status_type nios2_elf32_gprel_relocate
63 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
64static bfd_reloc_status_type nios2_elf32_ujmp_relocate
65 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
66static bfd_reloc_status_type nios2_elf32_cjmp_relocate
67 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
68static bfd_reloc_status_type nios2_elf32_callr_relocate
69 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
70
71/* Target vector. */
6d00b590
AM		 72extern const bfd_target nios2_elf32_le_vec;
73extern const bfd_target nios2_elf32_be_vec;
36591ba1
SL		 74
75/* Offset of tp and dtp pointers from start of TLS block. */
76#define TP_OFFSET 0x7000
77#define DTP_OFFSET 0x8000
78
8c163c5a
SL		 79/* The relocation tables used for SHT_REL sections. There are separate
80 tables for R1 and R2 encodings. */
81static reloc_howto_type elf_nios2_r1_howto_table_rel[] = {
36591ba1
SL		 82 /* No relocation. */
83 HOWTO (R_NIOS2_NONE, /* type */
84 0, /* rightshift */
6346d5ca 85 3, /* size (0 = byte, 1 = short, 2 = long) */
36591ba1
SL		 86 0, /* bitsize */
87 FALSE, /* pc_relative */
88 0, /* bitpos */
89 complain_overflow_dont, /* complain_on_overflow */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_NIOS2_NONE", /* name */
92 FALSE, /* partial_inplace */
93 0, /* src_mask */
94 0, /* dst_mask */
95 FALSE), /* pcrel_offset */
96
97 /* 16-bit signed immediate relocation. */
98 HOWTO (R_NIOS2_S16, /* type */
99 0, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 6, /* bitpos */
104 complain_overflow_signed, /* complain on overflow */
105 bfd_elf_generic_reloc, /* special function */
106 "R_NIOS2_S16", /* name */
107 FALSE, /* partial_inplace */
108 0x003fffc0, /* src_mask */
109 0x003fffc0, /* dest_mask */
110 FALSE), /* pcrel_offset */
111
112 /* 16-bit unsigned immediate relocation. */
113 HOWTO (R_NIOS2_U16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 6, /* bitpos */
119 complain_overflow_unsigned, /* complain on overflow */
120 bfd_elf_generic_reloc, /* special function */
121 "R_NIOS2_U16", /* name */
122 FALSE, /* partial_inplace */
123 0x003fffc0, /* src_mask */
124 0x003fffc0, /* dest_mask */
125 FALSE), /* pcrel_offset */
126
127 HOWTO (R_NIOS2_PCREL16, /* type */
128 0, /* rightshift */
129 2, /* size (0 = byte, 1 = short, 2 = long) */
130 16, /* bitsize */
131 TRUE, /* pc_relative */
132 6, /* bitpos */
133 complain_overflow_signed, /* complain on overflow */
134 nios2_elf32_pcrel16_relocate, /* special function */
135 "R_NIOS2_PCREL16", /* name */
136 FALSE, /* partial_inplace */
137 0x003fffc0, /* src_mask */
138 0x003fffc0, /* dest_mask */
139 TRUE), /* pcrel_offset */
140
141 HOWTO (R_NIOS2_CALL26, /* type */
142 2, /* rightshift */
143 2, /* size (0 = byte, 1 = short, 2 = long) */
144 26, /* bitsize */
145 FALSE, /* pc_relative */
146 6, /* bitpos */
147 complain_overflow_dont, /* complain on overflow */
148 nios2_elf32_call26_relocate, /* special function */
149 "R_NIOS2_CALL26", /* name */
150 FALSE, /* partial_inplace */
151 0xffffffc0, /* src_mask */
152 0xffffffc0, /* dst_mask */
153 FALSE), /* pcrel_offset */
154
155 HOWTO (R_NIOS2_IMM5,
156 0,
157 2,
158 5,
159 FALSE,
160 6,
161 complain_overflow_bitfield,
162 bfd_elf_generic_reloc,
163 "R_NIOS2_IMM5",
164 FALSE,
165 0x000007c0,
166 0x000007c0,
167 FALSE),
168
169 HOWTO (R_NIOS2_CACHE_OPX,
170 0,
171 2,
172 5,
173 FALSE,
174 22,
175 complain_overflow_bitfield,
176 bfd_elf_generic_reloc,
177 "R_NIOS2_CACHE_OPX",
178 FALSE,
179 0x07c00000,
180 0x07c00000,
181 FALSE),
182
183 HOWTO (R_NIOS2_IMM6,
184 0,
185 2,
186 6,
187 FALSE,
188 6,
189 complain_overflow_bitfield,
190 bfd_elf_generic_reloc,
191 "R_NIOS2_IMM6",
192 FALSE,
193 0x00000fc0,
194 0x00000fc0,
195 FALSE),
196
197 HOWTO (R_NIOS2_IMM8,
198 0,
199 2,
200 8,
201 FALSE,
202 6,
203 complain_overflow_bitfield,
204 bfd_elf_generic_reloc,
205 "R_NIOS2_IMM8",
206 FALSE,
207 0x00003fc0,
208 0x00003fc0,
209 FALSE),
210
211 HOWTO (R_NIOS2_HI16,
212 0,
213 2,
214 32,
215 FALSE,
216 6,
217 complain_overflow_dont,
218 nios2_elf32_hi16_relocate,
219 "R_NIOS2_HI16",
220 FALSE,
221 0x003fffc0,
222 0x003fffc0,
223 FALSE),
224
225 HOWTO (R_NIOS2_LO16,
226 0,
227 2,
228 32,
229 FALSE,
230 6,
231 complain_overflow_dont,
232 nios2_elf32_lo16_relocate,
233 "R_NIOS2_LO16",
234 FALSE,
235 0x003fffc0,
236 0x003fffc0,
237 FALSE),
238
239 HOWTO (R_NIOS2_HIADJ16,
240 0,
241 2,
242 32,
243 FALSE,
244 6,
245 complain_overflow_dont,
246 nios2_elf32_hiadj16_relocate,
247 "R_NIOS2_HIADJ16",
248 FALSE,
249 0x003fffc0,
250 0x003fffc0,
251 FALSE),
252
253 HOWTO (R_NIOS2_BFD_RELOC_32,
254 0,
255 2, /* long */
256 32,
257 FALSE,
258 0,
259 complain_overflow_dont,
260 bfd_elf_generic_reloc,
261 "R_NIOS2_BFD_RELOC32",
262 FALSE,
263 0xffffffff,
264 0xffffffff,
265 FALSE),
266
267 HOWTO (R_NIOS2_BFD_RELOC_16,
268 0,
269 1, /* short */
270 16,
271 FALSE,
272 0,
273 complain_overflow_bitfield,
274 bfd_elf_generic_reloc,
275 "R_NIOS2_BFD_RELOC16",
276 FALSE,
277 0x0000ffff,
278 0x0000ffff,
279 FALSE),
280
281 HOWTO (R_NIOS2_BFD_RELOC_8,
282 0,
283 0, /* byte */
284 8,
285 FALSE,
286 0,
287 complain_overflow_bitfield,
288 bfd_elf_generic_reloc,
289 "R_NIOS2_BFD_RELOC8",
290 FALSE,
291 0x000000ff,
292 0x000000ff,
293 FALSE),
294
295 HOWTO (R_NIOS2_GPREL,
296 0,
297 2,
298 32,
299 FALSE,
300 6,
301 complain_overflow_dont,
302 nios2_elf32_gprel_relocate,
303 "R_NIOS2_GPREL",
304 FALSE,
305 0x003fffc0,
306 0x003fffc0,
307 FALSE),
308
309 HOWTO (R_NIOS2_GNU_VTINHERIT,
310 0,
311 2, /* short */
312 0,
313 FALSE,
314 0,
315 complain_overflow_dont,
316 NULL,
317 "R_NIOS2_GNU_VTINHERIT",
318 FALSE,
319 0,
320 0,
321 FALSE),
322
323 HOWTO (R_NIOS2_GNU_VTENTRY,
324 0,
325 2, /* byte */
326 0,
327 FALSE,
328 0,
329 complain_overflow_dont,
330 _bfd_elf_rel_vtable_reloc_fn,
331 "R_NIOS2_GNU_VTENTRY",
332 FALSE,
333 0,
334 0,
335 FALSE),
336
337 HOWTO (R_NIOS2_UJMP,
338 0,
339 2,
340 32,
341 FALSE,
342 6,
343 complain_overflow_dont,
344 nios2_elf32_ujmp_relocate,
345 "R_NIOS2_UJMP",
346 FALSE,
347 0x003fffc0,
348 0x003fffc0,
349 FALSE),
350
351 HOWTO (R_NIOS2_CJMP,
352 0,
353 2,
354 32,
355 FALSE,
356 6,
357 complain_overflow_dont,
358 nios2_elf32_cjmp_relocate,
359 "R_NIOS2_CJMP",
360 FALSE,
361 0x003fffc0,
362 0x003fffc0,
363 FALSE),
364
365 HOWTO (R_NIOS2_CALLR,
366 0,
367 2,
368 32,
369 FALSE,
370 6,
371 complain_overflow_dont,
372 nios2_elf32_callr_relocate,
373 "R_NIOS2_CALLR",
374 FALSE,
375 0x003fffc0,
376 0x003fffc0,
377 FALSE),
378
379 HOWTO (R_NIOS2_ALIGN,
380 0,
381 2,
382 0,
383 FALSE,
384 0,
385 complain_overflow_dont,
386 nios2_elf32_ignore_reloc,
387 "R_NIOS2_ALIGN",
388 FALSE,
389 0,
390 0,
391 TRUE),
392
393
394 HOWTO (R_NIOS2_GOT16,
395 0,
396 2,
397 16,
398 FALSE,
399 6,
400 complain_overflow_bitfield,
401 bfd_elf_generic_reloc,
402 "R_NIOS2_GOT16",
403 FALSE,
404 0x003fffc0,
405 0x003fffc0,
406 FALSE),
407
408 HOWTO (R_NIOS2_CALL16,
409 0,
410 2,
411 16,
412 FALSE,
413 6,
414 complain_overflow_bitfield,
415 bfd_elf_generic_reloc,
416 "R_NIOS2_CALL16",
417 FALSE,
418 0x003fffc0,
419 0x003fffc0,
420 FALSE),
421
422 HOWTO (R_NIOS2_GOTOFF_LO,
423 0,
424 2,
425 16,
426 FALSE,
427 6,
428 complain_overflow_dont,
429 bfd_elf_generic_reloc,
430 "R_NIOS2_GOTOFF_LO",
431 FALSE,
432 0x003fffc0,
433 0x003fffc0,
434 FALSE),
435
436 HOWTO (R_NIOS2_GOTOFF_HA,
437 0,
438 2,
439 16,
440 FALSE,
441 6,
442 complain_overflow_dont,
443 bfd_elf_generic_reloc,
444 "R_NIOS2_GOTOFF_HA",
445 FALSE,
446 0x003fffc0,
447 0x003fffc0,
448 FALSE),
449
450 HOWTO (R_NIOS2_PCREL_LO,
451 0,
452 2,
453 16,
454 TRUE,
455 6,
456 complain_overflow_dont,
457 nios2_elf32_pcrel_lo16_relocate,
458 "R_NIOS2_PCREL_LO",
459 FALSE,
460 0x003fffc0,
461 0x003fffc0,
462 TRUE),
463
464 HOWTO (R_NIOS2_PCREL_HA,
465 0,
466 2,
467 16,
468 FALSE, /* This is a PC-relative relocation, but we need to subtract
469 PC ourselves before the HIADJ. */
470 6,
471 complain_overflow_dont,
472 nios2_elf32_pcrel_hiadj16_relocate,
473 "R_NIOS2_PCREL_HA",
474 FALSE,
475 0x003fffc0,
476 0x003fffc0,
477 TRUE),
478
479 HOWTO (R_NIOS2_TLS_GD16,
480 0,
481 2,
482 16,
483 FALSE,
484 6,
485 complain_overflow_bitfield,
486 bfd_elf_generic_reloc,
487 "R_NIOS2_TLS_GD16",
488 FALSE,
489 0x003fffc0,
490 0x003fffc0,
491 FALSE),
492
493 HOWTO (R_NIOS2_TLS_LDM16,
494 0,
495 2,
496 16,
497 FALSE,
498 6,
499 complain_overflow_bitfield,
500 bfd_elf_generic_reloc,
501 "R_NIOS2_TLS_LDM16",
502 FALSE,
503 0x003fffc0,
504 0x003fffc0,
505 FALSE),
506
507 HOWTO (R_NIOS2_TLS_LDO16,
508 0,
509 2,
510 16,
511 FALSE,
512 6,
513 complain_overflow_bitfield,
514 bfd_elf_generic_reloc,
515 "R_NIOS2_TLS_LDO16",
516 FALSE,
517 0x003fffc0,
518 0x003fffc0,
519 FALSE),
520
521 HOWTO (R_NIOS2_TLS_IE16,
522 0,
523 2,
524 16,
525 FALSE,
526 6,
527 complain_overflow_bitfield,
528 bfd_elf_generic_reloc,
529 "R_NIOS2_TLS_IE16",
530 FALSE,
531 0x003fffc0,
532 0x003fffc0,
533 FALSE),
534
535 HOWTO (R_NIOS2_TLS_LE16,
536 0,
537 2,
538 16,
539 FALSE,
540 6,
541 complain_overflow_bitfield,
542 bfd_elf_generic_reloc,
543 "R_NIOS2_TLS_LE16",
544 FALSE,
545 0x003fffc0,
546 0x003fffc0,
547 FALSE),
548
549 HOWTO (R_NIOS2_TLS_DTPMOD,
550 0,
551 2,
552 32,
553 FALSE,
554 0,
555 complain_overflow_dont,
556 bfd_elf_generic_reloc,
557 "R_NIOS2_TLS_DTPMOD",
558 FALSE,
559 0xffffffff,
560 0xffffffff,
561 FALSE),
562
563 HOWTO (R_NIOS2_TLS_DTPREL,
564 0,
565 2,
566 32,
567 FALSE,
568 0,
569 complain_overflow_dont,
570 bfd_elf_generic_reloc,
571 "R_NIOS2_TLS_DTPREL",
572 FALSE,
573 0xffffffff,
574 0xffffffff,
575 FALSE),
576
577 HOWTO (R_NIOS2_TLS_TPREL,
578 0,
579 2,
580 32,
581 FALSE,
582 0,
583 complain_overflow_dont,
584 bfd_elf_generic_reloc,
585 "R_NIOS2_TLS_TPREL",
586 FALSE,
587 0xffffffff,
588 0xffffffff,
589 FALSE),
590
591 HOWTO (R_NIOS2_COPY,
592 0,
593 2,
594 32,
595 FALSE,
596 0,
597 complain_overflow_dont,
598 bfd_elf_generic_reloc,
599 "R_NIOS2_COPY",
600 FALSE,
601 0,
602 0,
603 FALSE),
604
605 HOWTO (R_NIOS2_GLOB_DAT,
606 0,
607 2,
608 32,
609 FALSE,
610 0,
611 complain_overflow_dont,
612 bfd_elf_generic_reloc,
613 "R_NIOS2_GLOB_DAT",
614 FALSE,
615 0xffffffff,
616 0xffffffff,
617 FALSE),
618
619 HOWTO (R_NIOS2_JUMP_SLOT,
620 0,
621 2,
622 32,
623 FALSE,
624 0,
625 complain_overflow_dont,
626 bfd_elf_generic_reloc,
627 "R_NIOS2_JUMP_SLOT",
628 FALSE,
629 0xffffffff,
630 0xffffffff,
631 FALSE),
632
633 HOWTO (R_NIOS2_RELATIVE,
634 0,
635 2,
636 32,
637 FALSE,
638 0,
639 complain_overflow_dont,
640 bfd_elf_generic_reloc,
641 "R_NIOS2_RELATIVE",
642 FALSE,
643 0xffffffff,
644 0xffffffff,
645 FALSE),
646
647 HOWTO (R_NIOS2_GOTOFF,
648 0,
649 2,
650 32,
651 FALSE,
652 0,
653 complain_overflow_dont,
654 bfd_elf_generic_reloc,
655 "R_NIOS2_GOTOFF",
656 FALSE,
657 0xffffffff,
658 0xffffffff,
659 FALSE),
660
78058a5e
SL		 661 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
662 2, /* rightshift */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
664 26, /* bitsize */
665 FALSE, /* pc_relative */
666 6, /* bitpos */
667 complain_overflow_dont, /* complain on overflow */
668 nios2_elf32_call26_relocate, /* special function */
669 "R_NIOS2_CALL26_NOAT", /* name */
670 FALSE, /* partial_inplace */
671 0xffffffc0, /* src_mask */
672 0xffffffc0, /* dst_mask */
673 FALSE), /* pcrel_offset */
674
1c2de463
SL		 675 HOWTO (R_NIOS2_GOT_LO,
676 0,
677 2,
678 16,
679 FALSE,
680 6,
681 complain_overflow_dont,
682 bfd_elf_generic_reloc,
683 "R_NIOS2_GOT_LO",
684 FALSE,
685 0x003fffc0,
686 0x003fffc0,
687 FALSE),
688
689 HOWTO (R_NIOS2_GOT_HA,
690 0,
691 2,
692 16,
693 FALSE,
694 6,
695 complain_overflow_dont,
696 bfd_elf_generic_reloc,
697 "R_NIOS2_GOT_HA",
698 FALSE,
699 0x003fffc0,
700 0x003fffc0,
701 FALSE),
702
703 HOWTO (R_NIOS2_CALL_LO,
704 0,
705 2,
706 16,
707 FALSE,
708 6,
709 complain_overflow_dont,
710 bfd_elf_generic_reloc,
711 "R_NIOS2_CALL_LO",
712 FALSE,
713 0x003fffc0,
714 0x003fffc0,
715 FALSE),
716
717 HOWTO (R_NIOS2_CALL_HA,
718 0,
719 2,
720 16,
721 FALSE,
722 6,
723 complain_overflow_dont,
724 bfd_elf_generic_reloc,
725 "R_NIOS2_CALL_HA",
726 FALSE,
727 0x003fffc0,
728 0x003fffc0,
729 FALSE),
730
36591ba1
SL		 731/* Add other relocations here. */
732};
733
8c163c5a
SL		 734static reloc_howto_type elf_nios2_r2_howto_table_rel[] = {
735 /* No relocation. */
736 HOWTO (R_NIOS2_NONE, /* type */
737 0, /* rightshift */
738 0, /* size (0 = byte, 1 = short, 2 = long) */
739 0, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_dont, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_NIOS2_NONE", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit signed immediate relocation. */
751 HOWTO (R_NIOS2_S16, /* type */
752 0, /* rightshift */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 16, /* bitpos */
757 complain_overflow_signed, /* complain on overflow */
758 bfd_elf_generic_reloc, /* special function */
759 "R_NIOS2_S16", /* name */
760 FALSE, /* partial_inplace */
761 0xffff0000, /* src_mask */
762 0xffff0000, /* dest_mask */
763 FALSE), /* pcrel_offset */
764
765 /* 16-bit unsigned immediate relocation. */
766 HOWTO (R_NIOS2_U16, /* type */
767 0, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 16, /* bitpos */
772 complain_overflow_unsigned, /* complain on overflow */
773 bfd_elf_generic_reloc, /* special function */
774 "R_NIOS2_U16", /* name */
775 FALSE, /* partial_inplace */
776 0xffff0000, /* src_mask */
777 0xffff0000, /* dest_mask */
778 FALSE), /* pcrel_offset */
779
780 HOWTO (R_NIOS2_PCREL16, /* type */
781 0, /* rightshift */
782 2, /* size (0 = byte, 1 = short, 2 = long) */
783 16, /* bitsize */
784 TRUE, /* pc_relative */
785 16, /* bitpos */
786 complain_overflow_signed, /* complain on overflow */
787 nios2_elf32_pcrel16_relocate, /* special function */
788 "R_NIOS2_PCREL16", /* name */
789 FALSE, /* partial_inplace */
790 0xffff0000, /* src_mask */
791 0xffff0000, /* dest_mask */
792 TRUE), /* pcrel_offset */
793
794 HOWTO (R_NIOS2_CALL26, /* type */
795 2, /* rightshift */
796 2, /* size (0 = byte, 1 = short, 2 = long) */
797 26, /* bitsize */
798 FALSE, /* pc_relative */
799 6, /* bitpos */
800 complain_overflow_dont, /* complain on overflow */
801 nios2_elf32_call26_relocate, /* special function */
802 "R_NIOS2_CALL26", /* name */
803 FALSE, /* partial_inplace */
804 0xffffffc0, /* src_mask */
805 0xffffffc0, /* dst_mask */
806 FALSE), /* pcrel_offset */
807
808 HOWTO (R_NIOS2_IMM5,
809 0,
810 2,
811 5,
812 FALSE,
813 21,
814 complain_overflow_bitfield,
815 bfd_elf_generic_reloc,
816 "R_NIOS2_IMM5",
817 FALSE,
818 0x03e00000,
819 0x03e00000,
820 FALSE),
821
822 HOWTO (R_NIOS2_CACHE_OPX,
823 0,
824 2,
825 5,
826 FALSE,
827 11,
828 complain_overflow_bitfield,
829 bfd_elf_generic_reloc,
830 "R_NIOS2_CACHE_OPX",
831 FALSE,
832 0x0000f800,
833 0x0000f800,
834 FALSE),
835
836 HOWTO (R_NIOS2_IMM6,
837 0,
838 2,
839 6,
840 FALSE,
841 26,
842 complain_overflow_bitfield,
843 bfd_elf_generic_reloc,
844 "R_NIOS2_IMM6",
845 FALSE,
846 0xfc000000,
847 0xfc000000,
848 FALSE),
849
850 HOWTO (R_NIOS2_IMM8,
851 0,
852 2,
853 8,
854 FALSE,
855 24,
856 complain_overflow_bitfield,
857 bfd_elf_generic_reloc,
858 "R_NIOS2_IMM8",
859 FALSE,
860 0xff000000,
861 0xff000000,
862 FALSE),
863
864 HOWTO (R_NIOS2_HI16,
865 0,
866 2,
867 32,
868 FALSE,
869 16,
870 complain_overflow_dont,
871 nios2_elf32_hi16_relocate,
872 "R_NIOS2_HI16",
873 FALSE,
874 0xffff0000,
875 0xffff0000,
876 FALSE),
877
878 HOWTO (R_NIOS2_LO16,
879 0,
880 2,
881 32,
882 FALSE,
883 16,
884 complain_overflow_dont,
885 nios2_elf32_lo16_relocate,
886 "R_NIOS2_LO16",
887 FALSE,
888 0xffff0000,
889 0xffff0000,
890 FALSE),
891
892 HOWTO (R_NIOS2_HIADJ16,
893 0,
894 2,
895 32,
896 FALSE,
897 16,
898 complain_overflow_dont,
899 nios2_elf32_hiadj16_relocate,
900 "R_NIOS2_HIADJ16",
901 FALSE,
902 0xffff0000,
903 0xffff0000,
904 FALSE),
905
906 HOWTO (R_NIOS2_BFD_RELOC_32,
907 0,
908 2, /* long */
909 32,
910 FALSE,
911 0,
912 complain_overflow_dont,
913 bfd_elf_generic_reloc,
914 "R_NIOS2_BFD_RELOC32",
915 FALSE,
916 0xffffffff,
917 0xffffffff,
918 FALSE),
919
920 HOWTO (R_NIOS2_BFD_RELOC_16,
921 0,
922 1, /* short */
923 16,
924 FALSE,
925 0,
926 complain_overflow_bitfield,
927 bfd_elf_generic_reloc,
928 "R_NIOS2_BFD_RELOC16",
929 FALSE,
930 0x0000ffff,
931 0x0000ffff,
932 FALSE),
933
934 HOWTO (R_NIOS2_BFD_RELOC_8,
935 0,
936 0, /* byte */
937 8,
938 FALSE,
939 0,
940 complain_overflow_bitfield,
941 bfd_elf_generic_reloc,
942 "R_NIOS2_BFD_RELOC8",
943 FALSE,
944 0x000000ff,
945 0x000000ff,
946 FALSE),
947
948 HOWTO (R_NIOS2_GPREL,
949 0,
950 2,
951 32,
952 FALSE,
953 16,
954 complain_overflow_dont,
955 nios2_elf32_gprel_relocate,
956 "R_NIOS2_GPREL",
957 FALSE,
958 0xffff0000,
959 0xffff0000,
960 FALSE),
961
962 HOWTO (R_NIOS2_GNU_VTINHERIT,
963 0,
964 2, /* short */
965 0,
966 FALSE,
967 0,
968 complain_overflow_dont,
969 NULL,
970 "R_NIOS2_GNU_VTINHERIT",
971 FALSE,
972 0,
973 0,
974 FALSE),
975
976 HOWTO (R_NIOS2_GNU_VTENTRY,
977 0,
978 2, /* byte */
979 0,
980 FALSE,
981 0,
982 complain_overflow_dont,
983 _bfd_elf_rel_vtable_reloc_fn,
984 "R_NIOS2_GNU_VTENTRY",
985 FALSE,
986 0,
987 0,
988 FALSE),
989
990 HOWTO (R_NIOS2_UJMP,
991 0,
992 2,
993 32,
994 FALSE,
995 16,
996 complain_overflow_dont,
997 nios2_elf32_ujmp_relocate,
998 "R_NIOS2_UJMP",
999 FALSE,
1000 0xffff0000,
1001 0xffff0000,
1002 FALSE),
1003
1004 HOWTO (R_NIOS2_CJMP,
1005 0,
1006 2,
1007 32,
1008 FALSE,
1009 16,
1010 complain_overflow_dont,
1011 nios2_elf32_cjmp_relocate,
1012 "R_NIOS2_CJMP",
1013 FALSE,
1014 0xffff0000,
1015 0xffff0000,
1016 FALSE),
1017
1018 HOWTO (R_NIOS2_CALLR,
1019 0,
1020 2,
1021 32,
1022 FALSE,
1023 16,
1024 complain_overflow_dont,
1025 nios2_elf32_callr_relocate,
1026 "R_NIOS2_CALLR",
1027 FALSE,
1028 0xffff0000,
1029 0xffff0000,
1030 FALSE),
1031
1032 HOWTO (R_NIOS2_ALIGN,
1033 0,
1034 2,
1035 0,
1036 FALSE,
1037 0,
1038 complain_overflow_dont,
1039 nios2_elf32_ignore_reloc,
1040 "R_NIOS2_ALIGN",
1041 FALSE,
1042 0,
1043 0,
1044 TRUE),
1045
1046 HOWTO (R_NIOS2_GOT16,
1047 0,
1048 2,
1049 16,
1050 FALSE,
1051 16,
1052 complain_overflow_bitfield,
1053 bfd_elf_generic_reloc,
1054 "R_NIOS2_GOT16",
1055 FALSE,
1056 0xffff0000,
1057 0xffff0000,
1058 FALSE),
1059
1060 HOWTO (R_NIOS2_CALL16,
1061 0,
1062 2,
1063 16,
1064 FALSE,
1065 16,
1066 complain_overflow_bitfield,
1067 bfd_elf_generic_reloc,
1068 "R_NIOS2_CALL16",
1069 FALSE,
1070 0xffff0000,
1071 0xffff0000,
1072 FALSE),
1073
1074 HOWTO (R_NIOS2_GOTOFF_LO,
1075 0,
1076 2,
1077 16,
1078 FALSE,
1079 16,
1080 complain_overflow_dont,
1081 bfd_elf_generic_reloc,
1082 "R_NIOS2_GOTOFF_LO",
1083 FALSE,
1084 0xffff0000,
1085 0xffff0000,
1086 FALSE),
1087
1088 HOWTO (R_NIOS2_GOTOFF_HA,
1089 0,
1090 2,
1091 16,
1092 FALSE,
1093 16,
1094 complain_overflow_dont,
1095 bfd_elf_generic_reloc,
1096 "R_NIOS2_GOTOFF_HA",
1097 FALSE,
1098 0xffff0000,
1099 0xffff0000,
1100 FALSE),
1101
1102 HOWTO (R_NIOS2_PCREL_LO,
1103 0,
1104 2,
1105 16,
1106 TRUE,
1107 16,
1108 complain_overflow_dont,
1109 nios2_elf32_pcrel_lo16_relocate,
1110 "R_NIOS2_PCREL_LO",
1111 FALSE,
1112 0xffff0000,
1113 0xffff0000,
1114 TRUE),
1115
1116 HOWTO (R_NIOS2_PCREL_HA,
1117 0,
1118 2,
1119 16,
1120 FALSE, /* This is a PC-relative relocation, but we need to subtract
1121 PC ourselves before the HIADJ. */
1122 16,
1123 complain_overflow_dont,
1124 nios2_elf32_pcrel_hiadj16_relocate,
1125 "R_NIOS2_PCREL_HA",
1126 FALSE,
1127 0xffff0000,
1128 0xffff0000,
1129 TRUE),
1130
1131 HOWTO (R_NIOS2_TLS_GD16,
1132 0,
1133 2,
1134 16,
1135 FALSE,
1136 16,
1137 complain_overflow_bitfield,
1138 bfd_elf_generic_reloc,
1139 "R_NIOS2_TLS_GD16",
1140 FALSE,
1141 0xffff0000,
1142 0xffff0000,
1143 FALSE),
1144
1145 HOWTO (R_NIOS2_TLS_LDM16,
1146 0,
1147 2,
1148 16,
1149 FALSE,
1150 16,
1151 complain_overflow_bitfield,
1152 bfd_elf_generic_reloc,
1153 "R_NIOS2_TLS_LDM16",
1154 FALSE,
1155 0xffff0000,
1156 0xffff0000,
1157 FALSE),
1158
1159 HOWTO (R_NIOS2_TLS_LDO16,
1160 0,
1161 2,
1162 16,
1163 FALSE,
1164 16,
1165 complain_overflow_bitfield,
1166 bfd_elf_generic_reloc,
1167 "R_NIOS2_TLS_LDO16",
1168 FALSE,
1169 0xffff0000,
1170 0xffff0000,
1171 FALSE),
1172
1173 HOWTO (R_NIOS2_TLS_IE16,
1174 0,
1175 2,
1176 16,
1177 FALSE,
1178 16,
1179 complain_overflow_bitfield,
1180 bfd_elf_generic_reloc,
1181 "R_NIOS2_TLS_IE16",
1182 FALSE,
1183 0xffff0000,
1184 0xffff0000,
1185 FALSE),
1186
1187 HOWTO (R_NIOS2_TLS_LE16,
1188 0,
1189 2,
1190 16,
1191 FALSE,
1192 16,
1193 complain_overflow_bitfield,
1194 bfd_elf_generic_reloc,
1195 "R_NIOS2_TLS_LE16",
1196 FALSE,
1197 0xffff0000,
1198 0xffff0000,
1199 FALSE),
1200
1201 HOWTO (R_NIOS2_TLS_DTPMOD,
1202 0,
1203 2,
1204 32,
1205 FALSE,
1206 0,
1207 complain_overflow_dont,
1208 bfd_elf_generic_reloc,
1209 "R_NIOS2_TLS_DTPMOD",
1210 FALSE,
1211 0xffffffff,
1212 0xffffffff,
1213 FALSE),
1214
1215 HOWTO (R_NIOS2_TLS_DTPREL,
1216 0,
1217 2,
1218 32,
1219 FALSE,
1220 0,
1221 complain_overflow_dont,
1222 bfd_elf_generic_reloc,
1223 "R_NIOS2_TLS_DTPREL",
1224 FALSE,
1225 0xffffffff,
1226 0xffffffff,
1227 FALSE),
1228
1229 HOWTO (R_NIOS2_TLS_TPREL,
1230 0,
1231 2,
1232 32,
1233 FALSE,
1234 0,
1235 complain_overflow_dont,
1236 bfd_elf_generic_reloc,
1237 "R_NIOS2_TLS_TPREL",
1238 FALSE,
1239 0xffffffff,
1240 0xffffffff,
1241 FALSE),
1242
1243 HOWTO (R_NIOS2_COPY,
1244 0,
1245 2,
1246 32,
1247 FALSE,
1248 0,
1249 complain_overflow_dont,
1250 bfd_elf_generic_reloc,
1251 "R_NIOS2_COPY",
1252 FALSE,
1253 0,
1254 0,
1255 FALSE),
1256
1257 HOWTO (R_NIOS2_GLOB_DAT,
1258 0,
1259 2,
1260 32,
1261 FALSE,
1262 0,
1263 complain_overflow_dont,
1264 bfd_elf_generic_reloc,
1265 "R_NIOS2_GLOB_DAT",
1266 FALSE,
1267 0xffffffff,
1268 0xffffffff,
1269 FALSE),
1270
1271 HOWTO (R_NIOS2_JUMP_SLOT,
1272 0,
1273 2,
1274 32,
1275 FALSE,
1276 0,
1277 complain_overflow_dont,
1278 bfd_elf_generic_reloc,
1279 "R_NIOS2_JUMP_SLOT",
1280 FALSE,
1281 0xffffffff,
1282 0xffffffff,
1283 FALSE),
1284
1285 HOWTO (R_NIOS2_RELATIVE,
1286 0,
1287 2,
1288 32,
1289 FALSE,
1290 0,
1291 complain_overflow_dont,
1292 bfd_elf_generic_reloc,
1293 "R_NIOS2_RELATIVE",
1294 FALSE,
1295 0xffffffff,
1296 0xffffffff,
1297 FALSE),
1298
1299 HOWTO (R_NIOS2_GOTOFF,
1300 0,
1301 2,
1302 32,
1303 FALSE,
1304 0,
1305 complain_overflow_dont,
1306 bfd_elf_generic_reloc,
1307 "R_NIOS2_GOTOFF",
1308 FALSE,
1309 0xffffffff,
1310 0xffffffff,
1311 FALSE),
1312
1313 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
1314 2, /* rightshift */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 26, /* bitsize */
1317 FALSE, /* pc_relative */
1318 6, /* bitpos */
1319 complain_overflow_dont, /* complain on overflow */
1320 nios2_elf32_call26_relocate, /* special function */
1321 "R_NIOS2_CALL26_NOAT", /* name */
1322 FALSE, /* partial_inplace */
1323 0xffffffc0, /* src_mask */
1324 0xffffffc0, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 HOWTO (R_NIOS2_GOT_LO,
1328 0,
1329 2,
1330 16,
1331 FALSE,
1332 16,
1333 complain_overflow_dont,
1334 bfd_elf_generic_reloc,
1335 "R_NIOS2_GOT_LO",
1336 FALSE,
1337 0xffff0000,
1338 0xffff0000,
1339 FALSE),
1340
1341 HOWTO (R_NIOS2_GOT_HA,
1342 0,
1343 2,
1344 16,
1345 FALSE,
1346 16,
1347 complain_overflow_dont,
1348 bfd_elf_generic_reloc,
1349 "R_NIOS2_GOT_HA",
1350 FALSE,
1351 0xffff0000,
1352 0xffff0000,
1353 FALSE),
1354
1355 HOWTO (R_NIOS2_CALL_LO,
1356 0,
1357 2,
1358 16,
1359 FALSE,
1360 16,
1361 complain_overflow_dont,
1362 bfd_elf_generic_reloc,
1363 "R_NIOS2_CALL_LO",
1364 FALSE,
1365 0xffff0000,
1366 0xffff0000,
1367 FALSE),
1368
1369 HOWTO (R_NIOS2_CALL_HA,
1370 0,
1371 2,
1372 16,
1373 FALSE,
1374 16,
1375 complain_overflow_dont,
1376 bfd_elf_generic_reloc,
1377 "R_NIOS2_CALL_HA",
1378 FALSE,
1379 0xffff0000,
1380 0xffff0000,
1381 FALSE),
1382
1383 HOWTO (R_NIOS2_R2_S12,
1384 0,
1385 2,
1386 12,
1387 FALSE,
1388 16,
1389 complain_overflow_signed,
1390 bfd_elf_generic_reloc,
1391 "R_NIOS2_R2_S12",
1392 FALSE,
1393 0x0fff0000,
1394 0x0fff0000,
1395 FALSE),
1396
1397 HOWTO (R_NIOS2_R2_I10_1_PCREL,
1398 1,
1399 1,
1400 10,
1401 TRUE,
1402 6,
1403 complain_overflow_signed,
07d6d2b8 1404 bfd_elf_generic_reloc, /* FIXME? */
8c163c5a
SL		 1405 "R_NIOS2_R2_I10_1_PCREL",
1406 FALSE,
1407 0xffc0,
1408 0xffc0,
1409 TRUE),
1410
1411 HOWTO (R_NIOS2_R2_T1I7_1_PCREL,
1412 1,
1413 1,
1414 7,
1415 TRUE,
1416 9,
1417 complain_overflow_signed,
1418 bfd_elf_generic_reloc, /* FIXME? */
1419 "R_NIOS2_R2_T1I7_1_PCREL",
1420 FALSE,
1421 0xfe00,
1422 0xfe00,
1423 TRUE),
1b786873 1424
8c163c5a
SL		 1425 HOWTO (R_NIOS2_R2_T1I7_2,
1426 2,
1427 1,
1428 7,
1429 FALSE,
1430 9,
1431 complain_overflow_unsigned,
1432 bfd_elf_generic_reloc,
1433 "R_NIOS2_R2_T1I7_2",
1434 FALSE,
1435 0xfe00,
1436 0xfe00,
1437 FALSE),
1b786873 1438
8c163c5a
SL		 1439 HOWTO (R_NIOS2_R2_T2I4,
1440 0,
1441 1,
1442 4,
1443 FALSE,
1444 12,
1445 complain_overflow_unsigned,
1446 bfd_elf_generic_reloc,
1447 "R_NIOS2_R2_T2I4",
1448 FALSE,
1449 0xf000,
1450 0xf000,
1451 FALSE),
1452
1453 HOWTO (R_NIOS2_R2_T2I4_1,
1454 1,
1455 1,
1456 4,
1457 FALSE,
1458 12,
1459 complain_overflow_unsigned,
1460 bfd_elf_generic_reloc,
1461 "R_NIOS2_R2_T2I4_1",
1462 FALSE,
1463 0xf000,
1464 0xf000,
1465 FALSE),
1466
1467 HOWTO (R_NIOS2_R2_T2I4_2,
1468 2,
1469 1,
1470 4,
1471 FALSE,
1472 12,
1473 complain_overflow_unsigned,
1474 bfd_elf_generic_reloc,
1475 "R_NIOS2_R2_T2I4_2",
1476 FALSE,
1477 0xf000,
1478 0xf000,
1479 FALSE),
1480
1481 HOWTO (R_NIOS2_R2_X1I7_2,
1482 2,
1483 1,
1484 7,
1485 FALSE,
1486 6,
1487 complain_overflow_unsigned,
1488 bfd_elf_generic_reloc,
1489 "R_NIOS2_R2_X1I7_2",
1490 FALSE,
1491 0x1fc0,
1492 0x1fc0,
1493 FALSE),
1b786873 1494
8c163c5a
SL		 1495 HOWTO (R_NIOS2_R2_X2L5,
1496 0,
1497 1,
1498 5,
1499 FALSE,
1500 6,
1501 complain_overflow_unsigned,
1502 bfd_elf_generic_reloc,
1503 "R_NIOS2_R2_X2L5",
1504 FALSE,
1505 0x07c0,
1506 0x07c0,
1507 FALSE),
1b786873 1508
8c163c5a
SL		 1509 HOWTO (R_NIOS2_R2_F1I5_2,
1510 2,
1511 1,
1512 5,
1513 FALSE,
1514 6,
1515 complain_overflow_unsigned,
1516 bfd_elf_generic_reloc,
1517 "R_NIOS2_R2_F1L5_2",
1518 FALSE,
1519 0x07c0,
1520 0x07c0,
1521 FALSE),
1522
1523 HOWTO (R_NIOS2_R2_L5I4X1,
1524 2,
1525 1,
1526 4,
1527 FALSE,
1528 6,
1529 complain_overflow_unsigned,
1530 bfd_elf_generic_reloc,
1531 "R_NIOS2_R2_L5I4X1",
1532 FALSE,
1533 0x03c0,
1534 0x03c0,
1535 FALSE),
1536
1537 HOWTO (R_NIOS2_R2_T1X1I6,
1538 0,
1539 1,
1540 6,
1541 FALSE,
1542 9,
1543 complain_overflow_unsigned,
1544 bfd_elf_generic_reloc,
1545 "R_NIOS2_R2_T1X1I6",
1546 FALSE,
1547 0x7e00,
1548 0x7e00,
1549 FALSE),
1b786873 1550
8c163c5a
SL		 1551 HOWTO (R_NIOS2_R2_T1X1I6_2,
1552 2,
1553 2,
1554 6,
1555 FALSE,
1556 9,
1557 complain_overflow_unsigned,
1558 bfd_elf_generic_reloc,
1559 "R_NIOS2_R2_T1I1X6_2",
1560 FALSE,
1561 0x7e00,
1562 0x7e00,
1563 FALSE),
1b786873 1564
8c163c5a
SL		 1565/* Add other relocations here. */
1566};
1567
36591ba1
SL		 1568static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1];
1569
8c163c5a
SL		 1570
1571/* Return true if producing output for a R2 BFD. */
1572#define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2)
1573
36591ba1
SL		 1574/* Return the howto for relocation RTYPE. */
1575static reloc_howto_type *
8c163c5a 1576lookup_howto (unsigned int rtype, bfd *abfd)
36591ba1
SL		 1577{
1578 static int initialized = 0;
1579 int i;
8c163c5a
SL		 1580 /* R2 relocations are a superset of R1, so use that for the lookup
1581 table. */
f3185997
NC		 1582 int r1_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel);
1583 int r2_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel);
36591ba1
SL		 1584
1585 if (!initialized)
1586 {
1587 initialized = 1;
1588 memset (elf_code_to_howto_index, 0xff,
1589 sizeof (elf_code_to_howto_index));
8c163c5a
SL		 1590 for (i = 0; i < r2_howto_tbl_size; i++)
1591 {
1592 elf_code_to_howto_index[elf_nios2_r2_howto_table_rel[i].type] = i;
1593 if (i < r1_howto_tbl_size)
1594 BFD_ASSERT (elf_nios2_r2_howto_table_rel[i].type
1595 == elf_nios2_r1_howto_table_rel[i].type);
1596 }
36591ba1
SL		 1597 }
1598
f3185997
NC		 1599 if (rtype > R_NIOS2_ILLEGAL)
1600 return NULL;
36591ba1 1601 i = elf_code_to_howto_index[rtype];
8c163c5a
SL		 1602 if (BFD_IS_R2 (abfd))
1603 {
1604 if (i >= r2_howto_tbl_size)
f3185997 1605 return NULL;
8c163c5a
SL		 1606 return elf_nios2_r2_howto_table_rel + i;
1607 }
1608 else
1609 {
1610 if (i >= r1_howto_tbl_size)
f3185997 1611 return NULL;
8c163c5a
SL		 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
f3185997
NC		 1623static const struct elf_reloc_map nios2_reloc_map[] =
1624{
0ba38529 1625 {BFD_RELOC_NONE, R_NIOS2_NONE},
36591ba1
SL		 1626 {BFD_RELOC_NIOS2_S16, R_NIOS2_S16},
1627 {BFD_RELOC_NIOS2_U16, R_NIOS2_U16},
1628 {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16},
1629 {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26},
1630 {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5},
1631 {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX},
1632 {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6},
1633 {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8},
1634 {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16},
1635 {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16},
1636 {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16},
1637 {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32},
1638 {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16},
1639 {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8},
1640 {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL},
1641 {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT},
1642 {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY},
1643 {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP},
1644 {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP},
1645 {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR},
1646 {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN},
1647 {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16},
1648 {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16},
1649 {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO},
1650 {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA},
1651 {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO},
1652 {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA},
1653 {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16},
1654 {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16},
1655 {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16},
1656 {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16},
1657 {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16},
1658 {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD},
1659 {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL},
1660 {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL},
1661 {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY},
1662 {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT},
1663 {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT},
1664 {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE},
78058a5e
SL		 1665 {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF},
1666 {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT},
1c2de463
SL		 1667 {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO},
1668 {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA},
1669 {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO},
1670 {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA},
8c163c5a
SL		 1671 {BFD_RELOC_NIOS2_R2_S12, R_NIOS2_R2_S12},
1672 {BFD_RELOC_NIOS2_R2_I10_1_PCREL, R_NIOS2_R2_I10_1_PCREL},
1673 {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL, R_NIOS2_R2_T1I7_1_PCREL},
1674 {BFD_RELOC_NIOS2_R2_T1I7_2, R_NIOS2_R2_T1I7_2},
1675 {BFD_RELOC_NIOS2_R2_T2I4, R_NIOS2_R2_T2I4},
1676 {BFD_RELOC_NIOS2_R2_T2I4_1, R_NIOS2_R2_T2I4_1},
1677 {BFD_RELOC_NIOS2_R2_T2I4_2, R_NIOS2_R2_T2I4_2},
1678 {BFD_RELOC_NIOS2_R2_X1I7_2, R_NIOS2_R2_X1I7_2},
1679 {BFD_RELOC_NIOS2_R2_X2L5, R_NIOS2_R2_X2L5},
1680 {BFD_RELOC_NIOS2_R2_F1I5_2, R_NIOS2_R2_F1I5_2},
1681 {BFD_RELOC_NIOS2_R2_L5I4X1, R_NIOS2_R2_L5I4X1},
1682 {BFD_RELOC_NIOS2_R2_T1X1I6, R_NIOS2_R2_T1X1I6},
1683 {BFD_RELOC_NIOS2_R2_T1X1I6_2, R_NIOS2_R2_T1X1I6_2},
78058a5e
SL		 1684};
1685
1686enum elf32_nios2_stub_type
1687{
1688 nios2_stub_call26_before,
1689 nios2_stub_call26_after,
1690 nios2_stub_none
1691};
1692
1693struct elf32_nios2_stub_hash_entry
1694{
1695 /* Base hash table entry structure. */
1696 struct bfd_hash_entry bh_root;
1697
1698 /* The stub section. */
1699 asection *stub_sec;
1700
1701 /* Offset within stub_sec of the beginning of this stub. */
1702 bfd_vma stub_offset;
1703
1704 /* Given the symbol's value and its section we can determine its final
1705 value when building the stubs (so the stub knows where to jump. */
1706 bfd_vma target_value;
1707 asection *target_section;
1708
1709 enum elf32_nios2_stub_type stub_type;
1710
1711 /* The symbol table entry, if any, that this was derived from. */
1712 struct elf32_nios2_link_hash_entry *hh;
1713
1714 /* And the reloc addend that this was derived from. */
1715 bfd_vma addend;
1716
1717 /* Where this stub is being called from, or, in the case of combined
1718 stub sections, the first input section in the group. */
1719 asection *id_sec;
36591ba1
SL		 1720};
1721
78058a5e
SL		 1722#define nios2_stub_hash_entry(ent) \
1723 ((struct elf32_nios2_stub_hash_entry *)(ent))
1724
1725#define nios2_stub_hash_lookup(table, string, create, copy) \
1726 ((struct elf32_nios2_stub_hash_entry *) \
1727 bfd_hash_lookup ((table), (string), (create), (copy)))
1728
1729
36591ba1
SL		 1730/* Nios II ELF linker hash entry. */
1731
1732struct elf32_nios2_link_hash_entry
1733{
1734 struct elf_link_hash_entry root;
1735
78058a5e
SL		 1736 /* A pointer to the most recently used stub hash entry against this
1737 symbol. */
1738 struct elf32_nios2_stub_hash_entry *hsh_cache;
1739
36591ba1
SL		 1740#define GOT_UNKNOWN 0
1741#define GOT_NORMAL 1
1742#define GOT_TLS_GD 2
1743#define GOT_TLS_IE 4
1744 unsigned char tls_type;
1745
1746 /* We need to detect and take special action for symbols which are only
1747 referenced with %call() and not with %got(). Such symbols do not need
1748 a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
1749 linking will not work if the dynamic GOT reloc exists.
1750 To check for this condition efficiently, we compare got_types_used against
1c2de463
SL		 1751 CALL_USED, meaning
1752 (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED.
1753 */
1754#define GOT_USED 1
1755#define CALL_USED 2
36591ba1
SL		 1756 unsigned char got_types_used;
1757};
1758
1759#define elf32_nios2_hash_entry(ent) \
1760 ((struct elf32_nios2_link_hash_entry *) (ent))
1761
1762/* Get the Nios II elf linker hash table from a link_info structure. */
1763#define elf32_nios2_hash_table(info) \
1764 ((struct elf32_nios2_link_hash_table *) ((info)->hash))
1765
1766/* Nios II ELF linker hash table. */
1767struct elf32_nios2_link_hash_table
1768 {
1769 /* The main hash table. */
1770 struct elf_link_hash_table root;
1771
78058a5e
SL		 1772 /* The stub hash table. */
1773 struct bfd_hash_table bstab;
1774
1775 /* Linker stub bfd. */
1776 bfd *stub_bfd;
1777
1778 /* Linker call-backs. */
1779 asection * (*add_stub_section) (const char *, asection *, bfd_boolean);
1780 void (*layout_sections_again) (void);
1781
1782 /* Array to keep track of which stub sections have been created, and
1783 information on stub grouping. */
1784 struct map_stub
1785 {
1786 /* These are the section to which stubs in the group will be
1787 attached. */
1788 asection *first_sec, *last_sec;
1789 /* The stub sections. There might be stubs inserted either before
1790 or after the real section.*/
1791 asection *first_stub_sec, *last_stub_sec;
1792 } *stub_group;
1793
1794 /* Assorted information used by nios2_elf32_size_stubs. */
1795 unsigned int bfd_count;
7292b3ac 1796 unsigned int top_index;
78058a5e
SL		 1797 asection **input_list;
1798 Elf_Internal_Sym **all_local_syms;
1799
36591ba1 1800 /* Short-cuts to get to dynamic linker sections. */
36591ba1
SL		 1801 asection *sbss;
1802
82e91538
SL		 1803 /* GOT pointer symbol _gp_got. */
1804 struct elf_link_hash_entry *h_gp_got;
1805
36591ba1
SL		 1806 union {
1807 bfd_signed_vma refcount;
1808 bfd_vma offset;
1809 } tls_ldm_got;
1810
36591ba1
SL		 1811 bfd_vma res_n_size;
1812 };
1813
1814struct nios2_elf32_obj_tdata
1815{
1816 struct elf_obj_tdata root;
1817
1818 /* tls_type for each local got entry. */
1819 char *local_got_tls_type;
1820
1821 /* TRUE if TLS GD relocs have been seen for this object. */
1822 bfd_boolean has_tlsgd;
1823};
1824
1825#define elf32_nios2_tdata(abfd) \
1826 ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any)
1827
1828#define elf32_nios2_local_got_tls_type(abfd) \
1829 (elf32_nios2_tdata (abfd)->local_got_tls_type)
1830
1831/* The name of the dynamic interpreter. This is put in the .interp
1832 section. */
1833#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1834
1835/* PLT implementation for position-dependent code. */
1836static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */
1837 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */
1838 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */
1839 0x7800683a /* jmp r15 */
1840};
1841
1842static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */
1843 0x03800034, /* movhi r14, %hiadj(res_0) */
1844 0x73800004, /* addi r14, r14, %lo(res_0) */
1845 0x7b9fc83a, /* sub r15, r15, r14 */
1846 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1847 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1848 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1849 0x6800683a /* jmp r13 */
1850};
1851
1852/* PLT implementation for position-independent code. */
1853static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */
1854 0x03c00034, /* movhi r15, %hiadj(index * 4) */
1855 0x7bc00004, /* addi r15, r15, %lo(index * 4) */
1856 0x00000006 /* br .PLTresolve */
1857};
1858
1859static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */
1860 0x001ce03a, /* nextpc r14 */
1861 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1862 0x6b9b883a, /* add r13, r13, r14 */
1863 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1864 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1865 0x6800683a /* jmp r13 */
1866};
1867
78058a5e
SL		 1868/* CALL26 stub. */
1869static const bfd_vma nios2_call26_stub_entry[] = {
1870 0x00400034, /* orhi at, r0, %hiadj(dest) */
1871 0x08400004, /* addi at, at, %lo(dest) */
1872 0x0800683a /* jmp at */
1873};
1874
1875/* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */
1876static void
1877nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value)
1878{
1879 bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset);
1880
83da6e74 1881 BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff);
78058a5e
SL		 1882
1883 bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6),
1884 sec->contents + offset);
1885}
1886
1887/* Install COUNT 32-bit values DATA starting at offset OFFSET into
1888 section SEC. */
1889static void
1890nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset,
1891 int count)
1892{
1893 while (count--)
1894 {
1895 bfd_put_32 (sec->owner, *data, sec->contents + offset);
1896 offset += 4;
1897 ++data;
1898 }
1899}
1900
1901/* The usual way of loading a 32-bit constant into a Nios II register is to
1902 load the high 16 bits in one instruction and then add the low 16 bits with
1903 a signed add. This means that the high halfword needs to be adjusted to
1904 compensate for the sign bit of the low halfword. This function returns the
1905 adjusted high halfword for a given 32-bit constant. */
1906static
1907bfd_vma hiadj (bfd_vma symbol_value)
1908{
1909 return ((symbol_value + 0x8000) >> 16) & 0xffff;
1910}
1911
36591ba1
SL		 1912/* Implement elf_backend_grok_prstatus:
1913 Support for core dump NOTE sections. */
1914static bfd_boolean
1915nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1916{
1917 int offset;
1918 size_t size;
1919
1920 switch (note->descsz)
1921 {
1922 default:
1923 return FALSE;
1924
1925 case 212: /* Linux/Nios II */
1926 /* pr_cursig */
228e534f 1927 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
36591ba1
SL		 1928
1929 /* pr_pid */
228e534f 1930 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24);
36591ba1
SL		 1931
1932 /* pr_reg */
1933 offset = 72;
1934 size = 136;
1935
1936 break;
1937 }
1938
1939 /* Make a ".reg/999" section. */
1940 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1941 size, note->descpos + offset);
1942}
1943
1944/* Implement elf_backend_grok_psinfo. */
1945static bfd_boolean
1946nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1947{
1948 switch (note->descsz)
1949 {
1950 default:
1951 return FALSE;
1952
1953 case 124: /* Linux/Nios II elf_prpsinfo */
228e534f 1954 elf_tdata (abfd)->core->program
36591ba1 1955 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 1956 elf_tdata (abfd)->core->command
36591ba1
SL		 1957 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1958 }
1959
1960 /* Note that for some reason, a spurious space is tacked
1961 onto the end of the args in some (at least one anyway)
1962 implementations, so strip it off if it exists. */
1963
1964 {
228e534f 1965 char *command = elf_tdata (abfd)->core->command;
36591ba1
SL		 1966 int n = strlen (command);
1967
1968 if (0 < n && command[n - 1] == ' ')
1969 command[n - 1] = '\0';
1970 }
1971
1972 return TRUE;
1973}
1974
78058a5e
SL		 1975/* Assorted hash table functions. */
1976
1977/* Initialize an entry in the stub hash table. */
1978static struct bfd_hash_entry *
1979stub_hash_newfunc (struct bfd_hash_entry *entry,
1980 struct bfd_hash_table *table,
1981 const char *string)
1982{
1983 /* Allocate the structure if it has not already been allocated by a
1984 subclass. */
1985 if (entry == NULL)
1986 {
1987 entry = bfd_hash_allocate (table,
1988 sizeof (struct elf32_nios2_stub_hash_entry));
1989 if (entry == NULL)
1990 return entry;
1991 }
1992
1993 /* Call the allocation method of the superclass. */
1994 entry = bfd_hash_newfunc (entry, table, string);
1995 if (entry != NULL)
1996 {
1997 struct elf32_nios2_stub_hash_entry *hsh;
1998
1999 /* Initialize the local fields. */
2000 hsh = (struct elf32_nios2_stub_hash_entry *) entry;
2001 hsh->stub_sec = NULL;
2002 hsh->stub_offset = 0;
2003 hsh->target_value = 0;
2004 hsh->target_section = NULL;
2005 hsh->stub_type = nios2_stub_none;
2006 hsh->hh = NULL;
2007 hsh->id_sec = NULL;
2008 }
2009
2010 return entry;
2011}
2012
36591ba1
SL		 2013/* Create an entry in a Nios II ELF linker hash table. */
2014static struct bfd_hash_entry *
2015link_hash_newfunc (struct bfd_hash_entry *entry,
2016 struct bfd_hash_table *table, const char *string)
2017{
2018 /* Allocate the structure if it has not already been allocated by a
2019 subclass. */
2020 if (entry == NULL)
2021 {
2022 entry = bfd_hash_allocate (table,
2023 sizeof (struct elf32_nios2_link_hash_entry));
2024 if (entry == NULL)
2025 return entry;
2026 }
2027
2028 /* Call the allocation method of the superclass. */
2029 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2030 if (entry)
2031 {
2032 struct elf32_nios2_link_hash_entry *eh;
2033
2034 eh = (struct elf32_nios2_link_hash_entry *) entry;
78058a5e 2035 eh->hsh_cache = NULL;
36591ba1
SL		 2036 eh->tls_type = GOT_UNKNOWN;
2037 eh->got_types_used = 0;
2038 }
2039
2040 return entry;
2041}
2042
78058a5e
SL		 2043/* Section name for stubs is the associated section name plus this
2044 string. */
2045#define STUB_SUFFIX ".stub"
2046
2047/* Build a name for an entry in the stub hash table. */
2048static char *
2049nios2_stub_name (const asection *input_section,
2050 const asection *sym_sec,
2051 const struct elf32_nios2_link_hash_entry *hh,
2052 const Elf_Internal_Rela *rel,
2053 enum elf32_nios2_stub_type stub_type)
2054{
2055 char *stub_name;
2056 bfd_size_type len;
2057 char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a';
2058
2059 if (hh)
2060 {
2061 len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1;
2062 stub_name = bfd_malloc (len);
2063 if (stub_name != NULL)
2064 {
2065 sprintf (stub_name, "%08x_%c_%s+%x",
2066 input_section->id & 0xffffffff,
2067 stubpos,
2068 hh->root.root.root.string,
2069 (int) rel->r_addend & 0xffffffff);
2070 }
2071 }
2072 else
2073 {
2074 len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1;
2075 stub_name = bfd_malloc (len);
2076 if (stub_name != NULL)
2077 {
2078 sprintf (stub_name, "%08x_%c_%x:%x+%x",
2079 input_section->id & 0xffffffff,
2080 stubpos,
2081 sym_sec->id & 0xffffffff,
2082 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
2083 (int) rel->r_addend & 0xffffffff);
2084 }
2085 }
2086 return stub_name;
2087}
2088
2089/* Look up an entry in the stub hash. Stub entries are cached because
2090 creating the stub name takes a bit of time. */
2091static struct elf32_nios2_stub_hash_entry *
2092nios2_get_stub_entry (const asection *input_section,
2093 const asection *sym_sec,
2094 struct elf32_nios2_link_hash_entry *hh,
2095 const Elf_Internal_Rela *rel,
2096 struct elf32_nios2_link_hash_table *htab,
2097 enum elf32_nios2_stub_type stub_type)
2098{
2099 struct elf32_nios2_stub_hash_entry *hsh;
2100 const asection *id_sec;
2101
2102 /* If this input section is part of a group of sections sharing one
2103 stub section, then use the id of the first/last section in the group,
2104 depending on the stub section placement relative to the group.
2105 Stub names need to include a section id, as there may well be
2106 more than one stub used to reach say, printf, and we need to
2107 distinguish between them. */
2108 if (stub_type == nios2_stub_call26_before)
2109 id_sec = htab->stub_group[input_section->id].first_sec;
2110 else
2111 id_sec = htab->stub_group[input_section->id].last_sec;
2112
2113 if (hh != NULL && hh->hsh_cache != NULL
2114 && hh->hsh_cache->hh == hh
2115 && hh->hsh_cache->id_sec == id_sec
2116 && hh->hsh_cache->stub_type == stub_type)
2117 {
2118 hsh = hh->hsh_cache;
2119 }
2120 else
2121 {
2122 char *stub_name;
2123
2124 stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type);
2125 if (stub_name == NULL)
2126 return NULL;
2127
2128 hsh = nios2_stub_hash_lookup (&htab->bstab,
2129 stub_name, FALSE, FALSE);
2130
2131 if (hh != NULL)
2132 hh->hsh_cache = hsh;
2133
2134 free (stub_name);
2135 }
2136
2137 return hsh;
2138}
2139
2140/* Add a new stub entry to the stub hash. Not all fields of the new
2141 stub entry are initialised. */
2142static struct elf32_nios2_stub_hash_entry *
2143nios2_add_stub (const char *stub_name,
2144 asection *section,
2145 struct elf32_nios2_link_hash_table *htab,
2146 enum elf32_nios2_stub_type stub_type)
2147{
2148 asection *link_sec;
2149 asection *stub_sec;
2150 asection **secptr, **linkptr;
2151 struct elf32_nios2_stub_hash_entry *hsh;
2152 bfd_boolean afterp;
2153
2154 if (stub_type == nios2_stub_call26_before)
2155 {
2156 link_sec = htab->stub_group[section->id].first_sec;
2157 secptr = &(htab->stub_group[section->id].first_stub_sec);
2158 linkptr = &(htab->stub_group[link_sec->id].first_stub_sec);
2159 afterp = FALSE;
2160 }
2161 else
2162 {
2163 link_sec = htab->stub_group[section->id].last_sec;
2164 secptr = &(htab->stub_group[section->id].last_stub_sec);
2165 linkptr = &(htab->stub_group[link_sec->id].last_stub_sec);
2166 afterp = TRUE;
2167 }
2168 stub_sec = *secptr;
2169 if (stub_sec == NULL)
2170 {
2171 stub_sec = *linkptr;
2172 if (stub_sec == NULL)
2173 {
2174 size_t namelen;
2175 bfd_size_type len;
2176 char *s_name;
2177
2178 namelen = strlen (link_sec->name);
2179 len = namelen + sizeof (STUB_SUFFIX);
2180 s_name = bfd_alloc (htab->stub_bfd, len);
2181 if (s_name == NULL)
2182 return NULL;
2183
2184 memcpy (s_name, link_sec->name, namelen);
2185 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2186
2187 stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp);
2188 if (stub_sec == NULL)
2189 return NULL;
2190 *linkptr = stub_sec;
2191 }
2192 *secptr = stub_sec;
2193 }
2194
2195 /* Enter this entry into the linker stub hash table. */
2196 hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name,
2197 TRUE, FALSE);
2198 if (hsh == NULL)
2199 {
695344c0 2200 /* xgettext:c-format */
871b3ab2 2201 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4eca0228
AM		 2202 section->owner,
2203 stub_name);
78058a5e
SL		 2204 return NULL;
2205 }
2206
2207 hsh->stub_sec = stub_sec;
2208 hsh->stub_offset = 0;
2209 hsh->id_sec = link_sec;
2210 return hsh;
2211}
2212
2213/* Set up various things so that we can make a list of input sections
2214 for each output section included in the link. Returns -1 on error,
2215 0 when no stubs will be needed, and 1 on success. */
2216int
2217nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
2218{
2219 bfd *input_bfd;
2220 unsigned int bfd_count;
7292b3ac 2221 unsigned int top_id, top_index;
78058a5e
SL		 2222 asection *section;
2223 asection **input_list, **list;
986f0783 2224 size_t amt;
78058a5e
SL		 2225 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2226
2227 /* Count the number of input BFDs and find the top input section id. */
2228 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2229 input_bfd != NULL;
c72f2fb2 2230 input_bfd = input_bfd->link.next)
78058a5e
SL		 2231 {
2232 bfd_count += 1;
2233 for (section = input_bfd->sections;
2234 section != NULL;
2235 section = section->next)
2236 {
2237 if (top_id < section->id)
2238 top_id = section->id;
2239 }
2240 }
2241
2242 htab->bfd_count = bfd_count;
2243
2244 amt = sizeof (struct map_stub) * (top_id + 1);
2245 htab->stub_group = bfd_zmalloc (amt);
2246 if (htab->stub_group == NULL)
2247 return -1;
2248
2249 /* We can't use output_bfd->section_count here to find the top output
2250 section index as some sections may have been removed, and
2251 strip_excluded_output_sections doesn't renumber the indices. */
2252 for (section = output_bfd->sections, top_index = 0;
2253 section != NULL;
2254 section = section->next)
2255 {
2256 if (top_index < section->index)
2257 top_index = section->index;
2258 }
2259
2260 htab->top_index = top_index;
2261 amt = sizeof (asection *) * (top_index + 1);
2262 input_list = bfd_malloc (amt);
2263 htab->input_list = input_list;
2264 if (input_list == NULL)
2265 return -1;
2266
2267 /* For sections we aren't interested in, mark their entries with a
2268 value we can check later. */
2269 list = input_list + top_index;
2270 do
2271 *list = bfd_abs_section_ptr;
2272 while (list-- != input_list);
2273
2274 for (section = output_bfd->sections;
2275 section != NULL;
2276 section = section->next)
2277 {
2278 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
2279 * have PC relative relocs in them but no code flag set. */
2280 if (((section->flags & SEC_CODE) != 0) ||
2281 strcmp(".ctors", section->name) ||
2282 strcmp(".dtors", section->name))
2283 input_list[section->index] = NULL;
2284 }
2285
2286 return 1;
2287}
2288
2289/* The linker repeatedly calls this function for each input section,
2290 in the order that input sections are linked into output sections.
2291 Build lists of input sections to determine groupings between which
2292 we may insert linker stubs. */
2293void
2294nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec)
2295{
2296 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2297
2298 if (isec->output_section->index <= htab->top_index)
2299 {
2300 asection **list = htab->input_list + isec->output_section->index;
2301 if (*list != bfd_abs_section_ptr)
2302 {
2303 /* Steal the last_sec pointer for our list.
2304 This happens to make the list in reverse order,
2305 which is what we want. */
2306 htab->stub_group[isec->id].last_sec = *list;
2307 *list = isec;
2308 }
2309 }
2310}
2311
2312/* Segment mask for CALL26 relocation relaxation. */
2313#define CALL26_SEGMENT(x) ((x) & 0xf0000000)
2314
2315/* Fudge factor for approximate maximum size of all stubs that might
2316 be inserted by the linker. This does not actually limit the number
2317 of stubs that might be inserted, and only affects strategy for grouping
2318 and placement of stubs. Perhaps this should be computed based on number
2319 of relocations seen, or be specifiable on the command line. */
2320#define MAX_STUB_SECTION_SIZE 0xffff
2321
2322/* See whether we can group stub sections together. Grouping stub
2323 sections may result in fewer stubs. More importantly, we need to
2324 put all .init* and .fini* stubs at the end of the .init or
2325 .fini output sections respectively, because glibc splits the
2326 _init and _fini functions into multiple parts. Putting a stub in
2327 the middle of a function is not a good idea.
2328 Rather than computing groups of a maximum fixed size, for Nios II
2329 CALL26 relaxation it makes more sense to compute the groups based on
2330 sections that fit within a 256MB address segment. Also do not allow
2331 a group to span more than one output section, since different output
2332 sections might correspond to different memory banks on a bare-metal
2333 target, etc. */
2334static void
2335group_sections (struct elf32_nios2_link_hash_table *htab)
2336{
2337 asection **list = htab->input_list + htab->top_index;
2338 do
2339 {
2340 /* The list is in reverse order so we'll search backwards looking
2341 for the first section that begins in the same memory segment,
2342 marking sections along the way to point at the tail for this
2343 group. */
2344 asection *tail = *list;
2345 if (tail == bfd_abs_section_ptr)
2346 continue;
2347 while (tail != NULL)
2348 {
2349 bfd_vma start = tail->output_section->vma + tail->output_offset;
2350 bfd_vma end = start + tail->size;
2351 bfd_vma segment = CALL26_SEGMENT (end);
2352 asection *prev;
2353
2354 if (segment != CALL26_SEGMENT (start)
2355 || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE))
2356 /* This section spans more than one memory segment, or is
2357 close enough to the end of the segment that adding stub
2358 sections before it might cause it to move so that it
2359 spans memory segments, or that stubs added at the end of
2360 this group might overflow into the next memory segment.
2361 Put it in a group by itself to localize the effects. */
2362 {
2363 prev = htab->stub_group[tail->id].last_sec;
2364 htab->stub_group[tail->id].last_sec = tail;
2365 htab->stub_group[tail->id].first_sec = tail;
2366 }
2367 else
2368 /* Collect more sections for this group. */
2369 {
2370 asection *curr, *first;
2371 for (curr = tail; ; curr = prev)
2372 {
2373 prev = htab->stub_group[curr->id].last_sec;
2374 if (!prev
2375 || tail->output_section != prev->output_section
2376 || (CALL26_SEGMENT (prev->output_section->vma
2377 + prev->output_offset)
2378 != segment))
2379 break;
2380 }
2381 first = curr;
2382 for (curr = tail; ; curr = prev)
2383 {
2384 prev = htab->stub_group[curr->id].last_sec;
2385 htab->stub_group[curr->id].last_sec = tail;
2386 htab->stub_group[curr->id].first_sec = first;
2387 if (curr == first)
2388 break;
2389 }
2390 }
2391
2392 /* Reset tail for the next group. */
2393 tail = prev;
2394 }
2395 }
2396 while (list-- != htab->input_list);
2397 free (htab->input_list);
2398}
2399
2400/* Determine the type of stub needed, if any, for a call. */
2401static enum elf32_nios2_stub_type
2402nios2_type_of_stub (asection *input_sec,
2403 const Elf_Internal_Rela *rel,
2404 struct elf32_nios2_link_hash_entry *hh,
2405 struct elf32_nios2_link_hash_table *htab,
2406 bfd_vma destination,
2407 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2408{
2409 bfd_vma location, segment, start, end;
2410 asection *s0, *s1, *s;
2411
2412 if (hh != NULL &&
2413 !(hh->root.root.type == bfd_link_hash_defined
2414 || hh->root.root.type == bfd_link_hash_defweak))
2415 return nios2_stub_none;
2416
2417 /* Determine where the call point is. */
2418 location = (input_sec->output_section->vma
2419 + input_sec->output_offset + rel->r_offset);
2420 segment = CALL26_SEGMENT (location);
2421
2422 /* Nios II CALL and JMPI instructions can transfer control to addresses
2423 within the same 256MB segment as the PC. */
2424 if (segment == CALL26_SEGMENT (destination))
2425 return nios2_stub_none;
2426
2427 /* Find the start and end addresses of the stub group. Also account for
2428 any already-created stub sections for this group. Note that for stubs
2429 in the end section, only the first instruction of the last stub
2430 (12 bytes long) needs to be within range. */
2431 s0 = htab->stub_group[input_sec->id].first_sec;
2432 s = htab->stub_group[s0->id].first_stub_sec;
2433 if (s != NULL && s->size > 0)
2434 start = s->output_section->vma + s->output_offset;
2435 else
2436 start = s0->output_section->vma + s0->output_offset;
2437
2438 s1 = htab->stub_group[input_sec->id].last_sec;
2439 s = htab->stub_group[s1->id].last_stub_sec;
2440 if (s != NULL && s->size > 0)
2441 end = s->output_section->vma + s->output_offset + s->size - 8;
2442 else
2443 end = s1->output_section->vma + s1->output_offset + s1->size;
2444
2445 BFD_ASSERT (start < end);
2446 BFD_ASSERT (start <= location);
2447 BFD_ASSERT (location < end);
2448
2449 /* Put stubs at the end of the group unless that is not a valid
2450 location and the beginning of the group is. It might be that
2451 neither the beginning nor end works if we have an input section
2452 so large that it spans multiple segment boundaries. In that
2453 case, punt; the end result will be a relocation overflow error no
2454 matter what we do here.
2455
2456 Note that adding stubs pushes up the addresses of all subsequent
2457 sections, so that stubs allocated on one pass through the
2458 relaxation loop may not be valid on the next pass. (E.g., we may
2459 allocate a stub at the beginning of the section on one pass and
2460 find that the call site has been bumped into the next memory
2461 segment on the next pass.) The important thing to note is that
2462 we never try to reclaim the space allocated to such unused stubs,
2463 so code size and section addresses can only increase with each
2464 iteration. Accounting for the start and end addresses of the
2465 already-created stub sections ensures that when the algorithm
2466 converges, it converges accurately, with the entire appropriate
2467 stub section accessible from the call site and not just the
2468 address at the start or end of the stub group proper. */
2469
2470 if (segment == CALL26_SEGMENT (end))
2471 return nios2_stub_call26_after;
2472 else if (segment == CALL26_SEGMENT (start))
2473 return nios2_stub_call26_before;
2474 else
2475 /* Perhaps this should be a dedicated error code. */
2476 return nios2_stub_none;
2477}
2478
2479static bfd_boolean
2480nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2481{
2482 struct elf32_nios2_stub_hash_entry *hsh
2483 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2484 asection *stub_sec = hsh->stub_sec;
2485 bfd_vma sym_value;
abf874aa 2486 struct bfd_link_info *info;
78058a5e 2487
abf874aa
CL		 2488 info = (struct bfd_link_info *) in_arg;
2489
2490 /* Fail if the target section could not be assigned to an output
2491 section. The user should fix his linker script. */
2492 if (hsh->target_section->output_section == NULL
2493 && info->non_contiguous_regions)
53215f21
CL		 2494 info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. "
2495 "Retry without --enable-non-contiguous-regions.\n"),
2496 hsh->target_section);
2497
78058a5e
SL		 2498 /* Make a note of the offset within the stubs for this entry. */
2499 hsh->stub_offset = stub_sec->size;
2500
2501 switch (hsh->stub_type)
2502 {
2503 case nios2_stub_call26_before:
2504 case nios2_stub_call26_after:
2505 /* A call26 stub looks like:
2506 orhi at, %hiadj(dest)
2507 addi at, at, %lo(dest)
2508 jmp at
2509 Note that call/jmpi instructions can't be used in PIC code
2510 so there is no reason for the stub to be PIC, either. */
2511 sym_value = (hsh->target_value
2512 + hsh->target_section->output_offset
2513 + hsh->target_section->output_section->vma
2514 + hsh->addend);
2515
2516 nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry,
2517 hsh->stub_offset, 3);
2518 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset,
2519 hiadj (sym_value));
2520 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4,
2521 (sym_value & 0xffff));
2522 stub_sec->size += 12;
2523 break;
2524 default:
2525 BFD_FAIL ();
2526 return FALSE;
2527 }
2528
2529 return TRUE;
2530}
2531
2532/* As above, but don't actually build the stub. Just bump offset so
2533 we know stub section sizes. */
2534static bfd_boolean
2535nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2536{
2537 struct elf32_nios2_stub_hash_entry *hsh
2538 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2539
2540 switch (hsh->stub_type)
2541 {
2542 case nios2_stub_call26_before:
2543 case nios2_stub_call26_after:
2544 hsh->stub_sec->size += 12;
2545 break;
2546 default:
2547 BFD_FAIL ();
2548 return FALSE;
2549 }
2550 return TRUE;
2551}
2552
2553/* Read in all local syms for all input bfds.
2554 Returns -1 on error, 0 otherwise. */
2555
2556static int
2557get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
2558 struct bfd_link_info *info)
2559{
2560 unsigned int bfd_indx;
2561 Elf_Internal_Sym *local_syms, **all_local_syms;
2562 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2563
2564 /* We want to read in symbol extension records only once. To do this
2565 we need to read in the local symbols in parallel and save them for
2566 later use; so hold pointers to the local symbols in an array. */
986f0783 2567 size_t amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
78058a5e
SL		 2568 all_local_syms = bfd_zmalloc (amt);
2569 htab->all_local_syms = all_local_syms;
2570 if (all_local_syms == NULL)
2571 return -1;
2572
2573 /* Walk over all the input BFDs, swapping in local symbols. */
2574 for (bfd_indx = 0;
2575 input_bfd != NULL;
c72f2fb2 2576 input_bfd = input_bfd->link.next, bfd_indx++)
78058a5e
SL		 2577 {
2578 Elf_Internal_Shdr *symtab_hdr;
2579
2580 /* We'll need the symbol table in a second. */
2581 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2582 if (symtab_hdr->sh_info == 0)
2583 continue;
2584
2585 /* We need an array of the local symbols attached to the input bfd. */
2586 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
2587 if (local_syms == NULL)
2588 {
2589 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2590 symtab_hdr->sh_info, 0,
2591 NULL, NULL, NULL);
2592 /* Cache them for elf_link_input_bfd. */
2593 symtab_hdr->contents = (unsigned char *) local_syms;
2594 }
2595 if (local_syms == NULL)
2596 return -1;
2597
2598 all_local_syms[bfd_indx] = local_syms;
2599 }
2600
2601 return 0;
2602}
2603
2604/* Determine and set the size of the stub section for a final link. */
2605bfd_boolean
2606nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd,
2607 struct bfd_link_info *info,
2608 asection *(*add_stub_section) (const char *,
2609 asection *, bfd_boolean),
2610 void (*layout_sections_again) (void))
2611{
2612 bfd_boolean stub_changed = FALSE;
2613 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2614
2615 /* Stash our params away. */
2616 htab->stub_bfd = stub_bfd;
2617 htab->add_stub_section = add_stub_section;
2618 htab->layout_sections_again = layout_sections_again;
2619
2620 /* FIXME: We only compute the section groups once. This could cause
2621 problems if adding a large stub section causes following sections,
2622 or parts of them, to move into another segment. However, this seems
2623 to be consistent with the way other back ends handle this.... */
2624 group_sections (htab);
2625
2626 if (get_local_syms (output_bfd, info->input_bfds, info))
2627 {
2628 if (htab->all_local_syms)
2629 goto error_ret_free_local;
2630 return FALSE;
2631 }
2632
2633 while (1)
2634 {
2635 bfd *input_bfd;
2636 unsigned int bfd_indx;
2637 asection *stub_sec;
2638
2639 for (input_bfd = info->input_bfds, bfd_indx = 0;
2640 input_bfd != NULL;
c72f2fb2 2641 input_bfd = input_bfd->link.next, bfd_indx++)
78058a5e
SL		 2642 {
2643 Elf_Internal_Shdr *symtab_hdr;
2644 asection *section;
2645 Elf_Internal_Sym *local_syms;
2646
2647 /* We'll need the symbol table in a second. */
2648 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2649 if (symtab_hdr->sh_info == 0)
2650 continue;
2651
2652 local_syms = htab->all_local_syms[bfd_indx];
2653
2654 /* Walk over each section attached to the input bfd. */
2655 for (section = input_bfd->sections;
2656 section != NULL;
2657 section = section->next)
2658 {
2659 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2660
2661 /* If there aren't any relocs, then there's nothing more
2662 to do. */
2663 if ((section->flags & SEC_RELOC) == 0
2664 || section->reloc_count == 0)
2665 continue;
2666
2667 /* If this section is a link-once section that will be
2668 discarded, then don't create any stubs. */
2669 if (section->output_section == NULL
2670 || section->output_section->owner != output_bfd)
2671 continue;
2672
2673 /* Get the relocs. */
2674 internal_relocs
2675 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
2676 info->keep_memory);
2677 if (internal_relocs == NULL)
2678 goto error_ret_free_local;
2679
2680 /* Now examine each relocation. */
2681 irela = internal_relocs;
2682 irelaend = irela + section->reloc_count;
2683 for (; irela < irelaend; irela++)
2684 {
2685 unsigned int r_type, r_indx;
2686 enum elf32_nios2_stub_type stub_type;
2687 struct elf32_nios2_stub_hash_entry *hsh;
2688 asection *sym_sec;
2689 bfd_vma sym_value;
2690 bfd_vma destination;
2691 struct elf32_nios2_link_hash_entry *hh;
2692 char *stub_name;
2693 const asection *id_sec;
2694
2695 r_type = ELF32_R_TYPE (irela->r_info);
2696 r_indx = ELF32_R_SYM (irela->r_info);
2697
2698 if (r_type >= (unsigned int) R_NIOS2_ILLEGAL)
2699 {
2700 bfd_set_error (bfd_error_bad_value);
2701 error_ret_free_internal:
2702 if (elf_section_data (section)->relocs == NULL)
2703 free (internal_relocs);
2704 goto error_ret_free_local;
2705 }
2706
2707 /* Only look for stubs on CALL and JMPI instructions. */
2708 if (r_type != (unsigned int) R_NIOS2_CALL26)
2709 continue;
2710
2711 /* Now determine the call target, its name, value,
2712 section. */
2713 sym_sec = NULL;
2714 sym_value = 0;
2715 destination = 0;
2716 hh = NULL;
2717 if (r_indx < symtab_hdr->sh_info)
2718 {
2719 /* It's a local symbol. */
2720 Elf_Internal_Sym *sym;
2721 Elf_Internal_Shdr *hdr;
2722 unsigned int shndx;
2723
2724 sym = local_syms + r_indx;
2725 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2726 sym_value = sym->st_value;
2727 shndx = sym->st_shndx;
2728 if (shndx < elf_numsections (input_bfd))
2729 {
2730 hdr = elf_elfsections (input_bfd)[shndx];
2731 sym_sec = hdr->bfd_section;
2732 destination = (sym_value + irela->r_addend
2733 + sym_sec->output_offset
2734 + sym_sec->output_section->vma);
2735 }
2736 }
2737 else
2738 {
2739 /* It's an external symbol. */
2740 int e_indx;
2741
2742 e_indx = r_indx - symtab_hdr->sh_info;
2743 hh = ((struct elf32_nios2_link_hash_entry *)
2744 elf_sym_hashes (input_bfd)[e_indx]);
2745
2746 while (hh->root.root.type == bfd_link_hash_indirect
2747 || hh->root.root.type == bfd_link_hash_warning)
2748 hh = ((struct elf32_nios2_link_hash_entry *)
2749 hh->root.root.u.i.link);
2750
2751 if (hh->root.root.type == bfd_link_hash_defined
2752 || hh->root.root.type == bfd_link_hash_defweak)
2753 {
2754 sym_sec = hh->root.root.u.def.section;
2755 sym_value = hh->root.root.u.def.value;
2756
2757 if (sym_sec->output_section != NULL)
2758 destination = (sym_value + irela->r_addend
2759 + sym_sec->output_offset
2760 + sym_sec->output_section->vma);
2761 else
2762 continue;
2763 }
2764 else if (hh->root.root.type == bfd_link_hash_undefweak)
2765 {
0e1862bb 2766 if (! bfd_link_pic (info))
78058a5e
SL		 2767 continue;
2768 }
2769 else if (hh->root.root.type == bfd_link_hash_undefined)
2770 {
2771 if (! (info->unresolved_syms_in_objects == RM_IGNORE
2772 && (ELF_ST_VISIBILITY (hh->root.other)
2773 == STV_DEFAULT)))
2774 continue;
2775 }
2776 else
2777 {
2778 bfd_set_error (bfd_error_bad_value);
2779 goto error_ret_free_internal;
2780 }
2781 }
2782
2783 /* Determine what (if any) linker stub is needed. */
2784 stub_type = nios2_type_of_stub (section, irela, hh, htab,
2785 destination, info);
2786 if (stub_type == nios2_stub_none)
2787 continue;
2788
2789 /* Support for grouping stub sections. */
2790 if (stub_type == nios2_stub_call26_before)
2791 id_sec = htab->stub_group[section->id].first_sec;
2792 else
2793 id_sec = htab->stub_group[section->id].last_sec;
2794
2795 /* Get the name of this stub. */
2796 stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela,
2797 stub_type);
2798 if (!stub_name)
2799 goto error_ret_free_internal;
2800
2801 hsh = nios2_stub_hash_lookup (&htab->bstab,
2802 stub_name,
2803 FALSE, FALSE);
2804 if (hsh != NULL)
2805 {
2806 /* The proper stub has already been created. */
2807 free (stub_name);
2808 continue;
2809 }
2810
2811 hsh = nios2_add_stub (stub_name, section, htab, stub_type);
2812 if (hsh == NULL)
2813 {
2814 free (stub_name);
2815 goto error_ret_free_internal;
2816 }
2817 hsh->target_value = sym_value;
2818 hsh->target_section = sym_sec;
2819 hsh->stub_type = stub_type;
2820 hsh->hh = hh;
2821 hsh->addend = irela->r_addend;
2822 stub_changed = TRUE;
2823 }
2824
2825 /* We're done with the internal relocs, free them. */
2826 if (elf_section_data (section)->relocs == NULL)
2827 free (internal_relocs);
2828 }
2829 }
2830
2831 if (!stub_changed)
2832 break;
2833
2834 /* OK, we've added some stubs. Find out the new size of the
2835 stub sections. */
2836 for (stub_sec = htab->stub_bfd->sections;
2837 stub_sec != NULL;
2838 stub_sec = stub_sec->next)
2839 stub_sec->size = 0;
2840
2841 bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab);
2842
2843 /* Ask the linker to do its stuff. */
2844 (*htab->layout_sections_again) ();
2845 stub_changed = FALSE;
2846 }
2847
2848 free (htab->all_local_syms);
2849 return TRUE;
2850
2851 error_ret_free_local:
2852 free (htab->all_local_syms);
2853 return FALSE;
2854}
2855
2856/* Build all the stubs associated with the current output file. The
2857 stubs are kept in a hash table attached to the main linker hash
2858 table. This function is called via nios2elf_finish in the linker. */
2859bfd_boolean
2860nios2_elf32_build_stubs (struct bfd_link_info *info)
2861{
2862 asection *stub_sec;
2863 struct bfd_hash_table *table;
2864 struct elf32_nios2_link_hash_table *htab;
2865
2866 htab = elf32_nios2_hash_table (info);
2867
2868 for (stub_sec = htab->stub_bfd->sections;
2869 stub_sec != NULL;
2870 stub_sec = stub_sec->next)
1511baec
SL		 2871 /* The stub_bfd may contain non-stub sections if it is also the
2872 dynobj. Any such non-stub sections are created with the
2873 SEC_LINKER_CREATED flag set, while stub sections do not
2874 have that flag. Ignore any non-stub sections here. */
2875 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
1b786873 2876 {
1511baec
SL		 2877 bfd_size_type size;
2878
2879 /* Allocate memory to hold the linker stubs. */
2880 size = stub_sec->size;
2881 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
2882 if (stub_sec->contents == NULL && size != 0)
2883 return FALSE;
2884 stub_sec->size = 0;
2885 }
78058a5e
SL		 2886
2887 /* Build the stubs as directed by the stub hash table. */
2888 table = &htab->bstab;
2889 bfd_hash_traverse (table, nios2_build_one_stub, info);
2890
2891 return TRUE;
2892}
2893
2894
965b1d80
SL		 2895#define is_nios2_elf(bfd) \
2896 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2897 && elf_object_id (bfd) == NIOS2_ELF_DATA)
2898
2899/* Merge backend specific data from an object file to the output
2900 object file when linking. */
2901
2902static bfd_boolean
50e03d47 2903nios2_elf32_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
965b1d80 2904{
50e03d47 2905 bfd *obfd = info->output_bfd;
965b1d80
SL		 2906 flagword old_flags;
2907 flagword new_flags;
2908
2909 if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd))
2910 return TRUE;
2911
2912 /* Check if we have the same endianness. */
50e03d47 2913 if (! _bfd_generic_verify_endian_match (ibfd, info))
965b1d80
SL		 2914 return FALSE;
2915
2916 new_flags = elf_elfheader (ibfd)->e_flags;
2917 old_flags = elf_elfheader (obfd)->e_flags;
2918 if (!elf_flags_init (obfd))
2919 {
2920 /* First call, no flags set. */
2921 elf_flags_init (obfd) = TRUE;
2922 elf_elfheader (obfd)->e_flags = new_flags;
2923
2924 switch (new_flags)
2925 {
2926 default:
2927 case EF_NIOS2_ARCH_R1:
2928 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1);
2929 break;
2930 case EF_NIOS2_ARCH_R2:
2931 if (bfd_big_endian (ibfd))
2932 {
4eca0228 2933 _bfd_error_handler
38f14ab8 2934 (_("error: %pB: big-endian R2 is not supported"), ibfd);
965b1d80
SL		 2935 bfd_set_error (bfd_error_bad_value);
2936 return FALSE;
2937 }
2938 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2);
2939 break;
2940 }
2941 }
2942
2943 /* Incompatible flags. */
2944 else if (new_flags != old_flags)
2945 {
2946 /* So far, the only incompatible flags denote incompatible
2947 architectures. */
4eca0228 2948 _bfd_error_handler
695344c0 2949 /* xgettext:c-format */
38f14ab8 2950 (_("error: %pB: conflicting CPU architectures %d/%d"),
965b1d80
SL		 2951 ibfd, new_flags, old_flags);
2952 bfd_set_error (bfd_error_bad_value);
2953 return FALSE;
2954 }
2955
2956 /* Merge Tag_compatibility attributes and any common GNU ones. */
50e03d47 2957 _bfd_elf_merge_object_attributes (ibfd, info);
965b1d80
SL		 2958
2959 return TRUE;
2960}
2961
36591ba1
SL		 2962/* Implement bfd_elf32_bfd_reloc_type_lookup:
2963 Given a BFD reloc type, return a howto structure. */
f3185997 2964
36591ba1 2965static reloc_howto_type *
8c163c5a 2966nios2_elf32_bfd_reloc_type_lookup (bfd *abfd,
36591ba1
SL		 2967 bfd_reloc_code_real_type code)
2968{
2969 int i;
1b786873 2970
f3185997 2971 for (i = 0; i < (int) ARRAY_SIZE (nios2_reloc_map); ++i)
36591ba1 2972 if (nios2_reloc_map[i].bfd_val == code)
8c163c5a 2973 return lookup_howto (nios2_reloc_map[i].elf_val, abfd);
36591ba1
SL		 2974 return NULL;
2975}
2976
2977/* Implement bfd_elf32_bfd_reloc_name_lookup:
2978 Given a reloc name, return a howto structure. */
f3185997 2979
36591ba1 2980static reloc_howto_type *
8c163c5a 2981nios2_elf32_bfd_reloc_name_lookup (bfd *abfd,
36591ba1
SL		 2982 const char *r_name)
2983{
8c163c5a
SL		 2984 int i;
2985 reloc_howto_type *howto_tbl;
2986 int howto_tbl_size;
36591ba1 2987
8c163c5a
SL		 2988 if (BFD_IS_R2 (abfd))
2989 {
2990 howto_tbl = elf_nios2_r2_howto_table_rel;
f3185997 2991 howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel);
8c163c5a
SL		 2992 }
2993 else
2994 {
2995 howto_tbl = elf_nios2_r1_howto_table_rel;
f3185997 2996 howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel);
8c163c5a 2997 }
1b786873 2998
8c163c5a
SL		 2999 for (i = 0; i < howto_tbl_size; i++)
3000 if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0)
3001 return howto_tbl + i;
f3185997 3002
1b786873 3003 return NULL;
36591ba1
SL		 3004}
3005
3006/* Implement elf_info_to_howto:
3007 Given a ELF32 relocation, fill in a arelent structure. */
f3185997
NC		 3008
3009static bfd_boolean
8c163c5a 3010nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr,
36591ba1
SL		 3011 Elf_Internal_Rela *dst)
3012{
3013 unsigned int r_type;
3014
3015 r_type = ELF32_R_TYPE (dst->r_info);
f3185997
NC		 3016 if ((cache_ptr->howto = lookup_howto (r_type, abfd)) == NULL)
3017 {
3018 /* xgettext:c-format */
3019 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
3020 abfd, r_type);
3021 bfd_set_error (bfd_error_bad_value);
3022 return FALSE;
3023 }
3024 return TRUE;
36591ba1
SL		 3025}
3026
3027/* Return the base VMA address which should be subtracted from real addresses
3028 when resolving @dtpoff relocation.
3029 This is PT_TLS segment p_vaddr. */
3030static bfd_vma
3031dtpoff_base (struct bfd_link_info *info)
3032{
3033 /* If tls_sec is NULL, we should have signalled an error already. */
3034 if (elf_hash_table (info)->tls_sec == NULL)
3035 return 0;
3036 return elf_hash_table (info)->tls_sec->vma;
3037}
3038
3039/* Return the relocation value for @tpoff relocation
3040 if STT_TLS virtual address is ADDRESS. */
3041static bfd_vma
3042tpoff (struct bfd_link_info *info, bfd_vma address)
3043{
3044 struct elf_link_hash_table *htab = elf_hash_table (info);
3045
3046 /* If tls_sec is NULL, we should have signalled an error already. */
3047 if (htab->tls_sec == NULL)
3048 return 0;
3049 return address - htab->tls_sec->vma;
3050}
3051
3052/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
3053 dangerous relocation. */
3054static bfd_boolean
3055nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info)
3056{
3057
3058 bfd_boolean gp_found;
3059 struct bfd_hash_entry *h;
3060 struct bfd_link_hash_entry *lh;
3061
3062 /* If we've already figured out what GP will be, just return it. */
3063 *pgp = _bfd_get_gp_value (output_bfd);
3064 if (*pgp)
3065 return TRUE;
3066
3067 h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE);
3068 lh = (struct bfd_link_hash_entry *) h;
dc1e8a47 3069 lookup:
36591ba1
SL		 3070 if (lh)
3071 {
3072 switch (lh->type)
3073 {
3074 case bfd_link_hash_undefined:
3075 case bfd_link_hash_undefweak:
3076 case bfd_link_hash_common:
3077 gp_found = FALSE;
3078 break;
3079 case bfd_link_hash_defined:
3080 case bfd_link_hash_defweak:
3081 gp_found = TRUE;
a7be2893
SL		 3082 {
3083 asection *sym_sec = lh->u.def.section;
3084 bfd_vma sym_value = lh->u.def.value;
3085
3086 if (sym_sec->output_section)
3087 sym_value = (sym_value + sym_sec->output_offset
3088 + sym_sec->output_section->vma);
3089 *pgp = sym_value;
3090 }
36591ba1
SL		 3091 break;
3092 case bfd_link_hash_indirect:
3093 case bfd_link_hash_warning:
3094 lh = lh->u.i.link;
3095 /* @@FIXME ignoring warning for now */
3096 goto lookup;
3097 case bfd_link_hash_new:
3098 default:
3099 abort ();
3100 }
3101 }
3102 else
3103 gp_found = FALSE;
3104
3105 if (!gp_found)
3106 {
3107 /* Only get the error once. */
3108 *pgp = 4;
3109 _bfd_set_gp_value (output_bfd, *pgp);
3110 return FALSE;
3111 }
3112
3113 _bfd_set_gp_value (output_bfd, *pgp);
3114
3115 return TRUE;
3116}
3117
3118/* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous
3119 if it's not available as we don't have a link_info pointer available here
3120 to look it up in the output symbol table. We don't need to adjust the
3121 symbol value for an external symbol if we are producing relocatable
3122 output. */
3123static bfd_reloc_status_type
1b786873 3124nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
36591ba1
SL		 3125 char **error_message, bfd_vma *pgp)
3126{
3127 if (bfd_is_und_section (symbol->section) && !relocatable)
3128 {
3129 *pgp = 0;
3130 return bfd_reloc_undefined;
3131 }
3132
3133 *pgp = _bfd_get_gp_value (output_bfd);
3134 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
3135 {
3136 if (relocatable)
3137 {
3138 /* Make up a value. */
3139 *pgp = symbol->section->output_section->vma + 0x4000;
3140 _bfd_set_gp_value (output_bfd, *pgp);
3141 }
3142 else
3143 {
3144 *error_message
3145 = (char *) _("global pointer relative relocation when _gp not defined");
3146 return bfd_reloc_dangerous;
3147 }
3148 }
3149
3150 return bfd_reloc_ok;
3151}
3152
36591ba1
SL		 3153/* Do the relocations that require special handling. */
3154static bfd_reloc_status_type
1b786873 3155nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3156 asection *input_section,
1b786873 3157 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3158 bfd_vma symbol_value, bfd_vma addend)
3159{
3160 symbol_value = symbol_value + addend;
3161 addend = 0;
3162 symbol_value = (symbol_value >> 16) & 0xffff;
3163 return _bfd_final_link_relocate (howto, abfd, input_section,
3164 data, offset, symbol_value, addend);
3165}
3166
3167static bfd_reloc_status_type
3168nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3169 asection *input_section,
1b786873 3170 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3171 bfd_vma symbol_value, bfd_vma addend)
3172{
3173 symbol_value = symbol_value + addend;
3174 addend = 0;
3175 symbol_value = symbol_value & 0xffff;
3176 return _bfd_final_link_relocate (howto, abfd, input_section,
3177 data, offset, symbol_value, addend);
3178}
3179
3180static bfd_reloc_status_type
3181nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3182 asection *input_section,
36591ba1
SL		 3183 bfd_byte *data, bfd_vma offset,
3184 bfd_vma symbol_value, bfd_vma addend)
3185{
3186 symbol_value = symbol_value + addend;
3187 addend = 0;
3188 symbol_value = hiadj(symbol_value);
3189 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3190 symbol_value, addend);
3191}
3192
3193static bfd_reloc_status_type
3194nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3195 asection *input_section,
36591ba1
SL		 3196 bfd_byte *data, bfd_vma offset,
3197 bfd_vma symbol_value, bfd_vma addend)
3198{
3199 symbol_value = symbol_value + addend;
3200 addend = 0;
3201 symbol_value = symbol_value & 0xffff;
3202 return _bfd_final_link_relocate (howto, abfd, input_section,
3203 data, offset, symbol_value, addend);
3204}
3205
3206static bfd_reloc_status_type
3207nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3208 asection *input_section,
36591ba1
SL		 3209 bfd_byte *data, bfd_vma offset,
3210 bfd_vma symbol_value, bfd_vma addend)
3211{
3212 symbol_value = symbol_value + addend;
3213 symbol_value -= (input_section->output_section->vma
3214 + input_section->output_offset);
3215 symbol_value -= offset;
3216 addend = 0;
3217 symbol_value = hiadj(symbol_value);
3218 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3219 symbol_value, addend);
3220}
3221
3222static bfd_reloc_status_type
3223nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3224 asection *input_section,
1b786873 3225 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3226 bfd_vma symbol_value, bfd_vma addend)
3227{
1b786873 3228 /* NIOS2 pc relative relocations are relative to the next 32-bit instruction
36591ba1
SL		 3229 so we need to subtract 4 before doing a final_link_relocate. */
3230 symbol_value = symbol_value + addend - 4;
3231 addend = 0;
3232 return _bfd_final_link_relocate (howto, abfd, input_section,
3233 data, offset, symbol_value, addend);
3234}
3235
3236static bfd_reloc_status_type
3237nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3238 asection *input_section,
1b786873 3239 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3240 bfd_vma symbol_value, bfd_vma addend)
3241{
3242 /* Check that the relocation is in the same page as the current address. */
1b786873 3243 if (CALL26_SEGMENT (symbol_value + addend)
78058a5e
SL		 3244 != CALL26_SEGMENT (input_section->output_section->vma
3245 + input_section->output_offset
3246 + offset))
36591ba1
SL		 3247 return bfd_reloc_overflow;
3248
8c163c5a
SL		 3249 /* Check that the target address is correctly aligned on a 4-byte
3250 boundary. */
3251 if ((symbol_value + addend) & 0x3)
3252 return bfd_reloc_overflow;
3253
36591ba1
SL		 3254 return _bfd_final_link_relocate (howto, abfd, input_section,
3255 data, offset, symbol_value, addend);
3256}
3257
3258static bfd_reloc_status_type
3259nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3260 asection *input_section,
1b786873 3261 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3262 bfd_vma symbol_value, bfd_vma addend)
3263{
3264 /* Because we need the output_bfd, the special handling is done
3265 in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */
3266 return _bfd_final_link_relocate (howto, abfd, input_section,
3267 data, offset, symbol_value, addend);
3268}
3269
3270static bfd_reloc_status_type
3271nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3272 asection *input_section,
1b786873 3273 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3274 bfd_vma symbol_value, bfd_vma addend)
3275{
3276 bfd_vma symbol_lo16, symbol_hi16;
3277 bfd_reloc_status_type r;
3278 symbol_value = symbol_value + addend;
3279 addend = 0;
3280 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3281 symbol_lo16 = symbol_value & 0xffff;
3282
3283 r = _bfd_final_link_relocate (howto, abfd, input_section,
3284 data, offset, symbol_hi16, addend);
3285
3286 if (r == bfd_reloc_ok)
3287 return _bfd_final_link_relocate (howto, abfd, input_section,
3288 data, offset + 4, symbol_lo16, addend);
3289
3290 return r;
3291}
3292
3293static bfd_reloc_status_type
3294nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3295 asection *input_section,
1b786873 3296 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3297 bfd_vma symbol_value, bfd_vma addend)
3298{
3299 bfd_vma symbol_lo16, symbol_hi16;
3300 bfd_reloc_status_type r;
3301 symbol_value = symbol_value + addend;
3302 addend = 0;
3303 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3304 symbol_lo16 = symbol_value & 0xffff;
3305
3306 r = _bfd_final_link_relocate (howto, abfd, input_section,
3307 data, offset, symbol_hi16, addend);
3308
3309 if (r == bfd_reloc_ok)
3310 return _bfd_final_link_relocate (howto, abfd, input_section,
3311 data, offset + 4, symbol_lo16, addend);
3312
3313 return r;
3314}
3315
3316static bfd_reloc_status_type
3317nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto,
25153ba0 3318 asection *input_section,
1b786873 3319 bfd_byte *data, bfd_vma offset,
36591ba1
SL		 3320 bfd_vma symbol_value, bfd_vma addend)
3321{
3322 bfd_vma symbol_lo16, symbol_hi16;
3323 bfd_reloc_status_type r;
3324 symbol_value = symbol_value + addend;
3325 addend = 0;
3326 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3327 symbol_lo16 = symbol_value & 0xffff;
3328
3329 r = _bfd_final_link_relocate (howto, abfd, input_section,
3330 data, offset, symbol_hi16, addend);
3331
3332 if (r == bfd_reloc_ok)
3333 return _bfd_final_link_relocate (howto, abfd, input_section,
3334 data, offset + 4, symbol_lo16, addend);
3335
3336 return r;
3337}
3338
3339/* HOWTO handlers for relocations that require special handling. */
3340
3341/* This is for relocations used only when relaxing to ensure
3342 changes in size of section don't screw up .align. */
3343static bfd_reloc_status_type
3344nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
1b786873
L		 3345 asymbol *symbol ATTRIBUTE_UNUSED,
3346 void *data ATTRIBUTE_UNUSED, asection *input_section,
3347 bfd *output_bfd,
36591ba1
SL		 3348 char **error_message ATTRIBUTE_UNUSED)
3349{
3350 if (output_bfd != NULL)
3351 reloc_entry->address += input_section->output_offset;
3352 return bfd_reloc_ok;
3353}
3354
3355static bfd_reloc_status_type
1b786873
L		 3356nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3357 void *data, asection *input_section,
3358 bfd *output_bfd,
36591ba1
SL		 3359 char **error_message ATTRIBUTE_UNUSED)
3360{
3361 /* This part is from bfd_elf_generic_reloc. */
3362 if (output_bfd != NULL
3363 && (symbol->flags & BSF_SECTION_SYM) == 0
3364 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3365 {
3366 reloc_entry->address += input_section->output_offset;
3367 return bfd_reloc_ok;
3368 }
3369
3370 if (output_bfd != NULL)
3371 /* FIXME: See bfd_perform_relocation. Is this right? */
3372 return bfd_reloc_continue;
3373
3374 return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto,
3375 input_section,
3376 data, reloc_entry->address,
3377 (symbol->value
3378 + symbol->section->output_section->vma
3379 + symbol->section->output_offset),
3380 reloc_entry->addend);
3381}
3382
3383static bfd_reloc_status_type
3384nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3385 void *data, asection *input_section,
3386 bfd *output_bfd,
36591ba1
SL		 3387 char **error_message ATTRIBUTE_UNUSED)
3388{
3389 /* This part is from bfd_elf_generic_reloc. */
3390 if (output_bfd != NULL
3391 && (symbol->flags & BSF_SECTION_SYM) == 0
3392 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3393 {
3394 reloc_entry->address += input_section->output_offset;
3395 return bfd_reloc_ok;
3396 }
3397
3398 if (output_bfd != NULL)
3399 /* FIXME: See bfd_perform_relocation. Is this right? */
3400 return bfd_reloc_continue;
3401
3402 return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto,
3403 input_section,
3404 data, reloc_entry->address,
3405 (symbol->value
3406 + symbol->section->output_section->vma
3407 + symbol->section->output_offset),
3408 reloc_entry->addend);
3409}
3410
3411static bfd_reloc_status_type
3412nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3413 void *data, asection *input_section,
3414 bfd *output_bfd,
36591ba1
SL		 3415 char **error_message ATTRIBUTE_UNUSED)
3416{
3417 /* This part is from bfd_elf_generic_reloc. */
3418 if (output_bfd != NULL
3419 && (symbol->flags & BSF_SECTION_SYM) == 0
3420 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3421 {
3422 reloc_entry->address += input_section->output_offset;
3423 return bfd_reloc_ok;
3424 }
3425
3426 if (output_bfd != NULL)
3427 /* FIXME: See bfd_perform_relocation. Is this right? */
3428 return bfd_reloc_continue;
3429
3430 return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto,
3431 input_section,
3432 data, reloc_entry->address,
3433 (symbol->value
3434 + symbol->section->output_section->vma
3435 + symbol->section->output_offset),
3436 reloc_entry->addend);
3437}
3438
3439static bfd_reloc_status_type
3440nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry,
3441 asymbol *symbol, void *data,
3442 asection *input_section, bfd *output_bfd,
3443 char **error_message ATTRIBUTE_UNUSED)
3444{
3445 /* This part is from bfd_elf_generic_reloc. */
3446 if (output_bfd != NULL
3447 && (symbol->flags & BSF_SECTION_SYM) == 0
3448 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3449 {
3450 reloc_entry->address += input_section->output_offset;
3451 return bfd_reloc_ok;
3452 }
3453
3454 if (output_bfd != NULL)
3455 /* FIXME: See bfd_perform_relocation. Is this right? */
3456 return bfd_reloc_continue;
3457
3458 return nios2_elf32_do_pcrel_lo16_relocate (
3459 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3460 (symbol->value + symbol->section->output_section->vma
3461 + symbol->section->output_offset),
3462 reloc_entry->addend);
3463}
3464
3465static bfd_reloc_status_type
3466nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry,
3467 asymbol *symbol, void *data,
3468 asection *input_section, bfd *output_bfd,
3469 char **error_message ATTRIBUTE_UNUSED)
3470{
3471 /* This part is from bfd_elf_generic_reloc. */
3472 if (output_bfd != NULL
3473 && (symbol->flags & BSF_SECTION_SYM) == 0
3474 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3475 {
3476 reloc_entry->address += input_section->output_offset;
3477 return bfd_reloc_ok;
3478 }
3479
3480 if (output_bfd != NULL)
3481 /* FIXME: See bfd_perform_relocation. Is this right? */
3482 return bfd_reloc_continue;
3483
3484 return nios2_elf32_do_pcrel_hiadj16_relocate (
3485 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3486 (symbol->value + symbol->section->output_section->vma
3487 + symbol->section->output_offset),
3488 reloc_entry->addend);
3489}
3490
3491static bfd_reloc_status_type
3492nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3493 void *data, asection *input_section,
3494 bfd *output_bfd,
36591ba1
SL		 3495 char **error_message ATTRIBUTE_UNUSED)
3496{
3497 /* This part is from bfd_elf_generic_reloc. */
3498 if (output_bfd != NULL
3499 && (symbol->flags & BSF_SECTION_SYM) == 0
3500 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3501 {
3502 reloc_entry->address += input_section->output_offset;
3503 return bfd_reloc_ok;
3504 }
3505
3506 if (output_bfd != NULL)
3507 /* FIXME: See bfd_perform_relocation. Is this right? */
3508 return bfd_reloc_continue;
3509
3510 return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto,
3511 input_section,
3512 data, reloc_entry->address,
3513 (symbol->value
3514 + symbol->section->output_section->vma
3515 + symbol->section->output_offset),
3516 reloc_entry->addend);
3517}
3518
3519static bfd_reloc_status_type
3520nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873
L		 3521 void *data, asection *input_section,
3522 bfd *output_bfd,
36591ba1
SL		 3523 char **error_message ATTRIBUTE_UNUSED)
3524{
3525 /* This part is from bfd_elf_generic_reloc. */
3526 if (output_bfd != NULL
3527 && (symbol->flags & BSF_SECTION_SYM) == 0
3528 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3529 {
3530 reloc_entry->address += input_section->output_offset;
3531 return bfd_reloc_ok;
3532 }
3533
3534 if (output_bfd != NULL)
3535 /* FIXME: See bfd_perform_relocation. Is this right? */
3536 return bfd_reloc_continue;
3537
3538 return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto,
3539 input_section,
3540 data, reloc_entry->address,
3541 (symbol->value
3542 + symbol->section->output_section->vma
3543 + symbol->section->output_offset),
3544 reloc_entry->addend);
3545}
3546
3547static bfd_reloc_status_type
3548nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3549 void *data, asection *input_section,
36591ba1
SL		 3550 bfd *output_bfd, char **msg)
3551{
3552 bfd_vma relocation;
3553 bfd_vma gp;
3554 bfd_reloc_status_type r;
3555
3556
3557 /* This part is from bfd_elf_generic_reloc. */
3558 if (output_bfd != NULL
3559 && (symbol->flags & BSF_SECTION_SYM) == 0
3560 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3561 {
3562 reloc_entry->address += input_section->output_offset;
3563 return bfd_reloc_ok;
3564 }
3565
3566 if (output_bfd != NULL)
3567 /* FIXME: See bfd_perform_relocation. Is this right? */
3568 return bfd_reloc_continue;
3569
3570 relocation = (symbol->value
3571 + symbol->section->output_section->vma
3572 + symbol->section->output_offset);
3573
3574 /* This assumes we've already cached the _gp symbol. */
3575 r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp);
3576 if (r == bfd_reloc_ok)
3577 {
3578 relocation = relocation + reloc_entry->addend - gp;
3579 reloc_entry->addend = 0;
3580 if ((signed) relocation < -32768 || (signed) relocation > 32767)
3581 {
3582 *msg = _("global pointer relative address out of range");
3583 r = bfd_reloc_outofrange;
3584 }
3585 else
3586 r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto,
3587 input_section,
3588 data, reloc_entry->address,
3589 relocation, reloc_entry->addend);
3590 }
3591
3592 return r;
3593}
3594
3595static bfd_reloc_status_type
3596nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3597 void *data, asection *input_section,
36591ba1
SL		 3598 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3599{
3600 /* This part is from bfd_elf_generic_reloc. */
3601 if (output_bfd != NULL
3602 && (symbol->flags & BSF_SECTION_SYM) == 0
3603 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3604 {
3605 reloc_entry->address += input_section->output_offset;
3606 return bfd_reloc_ok;
3607 }
3608
3609 if (output_bfd != NULL)
3610 /* FIXME: See bfd_perform_relocation. Is this right? */
3611 return bfd_reloc_continue;
3612
3613 return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto,
3614 input_section,
3615 data, reloc_entry->address,
3616 (symbol->value
3617 + symbol->section->output_section->vma
3618 + symbol->section->output_offset),
3619 reloc_entry->addend);
3620}
3621
3622static bfd_reloc_status_type
3623nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3624 void *data, asection *input_section,
36591ba1
SL		 3625 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3626{
3627 /* This part is from bfd_elf_generic_reloc. */
3628 if (output_bfd != NULL
3629 && (symbol->flags & BSF_SECTION_SYM) == 0
3630 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3631 {
3632 reloc_entry->address += input_section->output_offset;
3633 return bfd_reloc_ok;
3634 }
3635
3636 if (output_bfd != NULL)
3637 /* FIXME: See bfd_perform_relocation. Is this right? */
3638 return bfd_reloc_continue;
3639
3640 return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto,
3641 input_section,
3642 data, reloc_entry->address,
3643 (symbol->value
3644 + symbol->section->output_section->vma
3645 + symbol->section->output_offset),
3646 reloc_entry->addend);
3647}
3648
3649static bfd_reloc_status_type
3650nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1b786873 3651 void *data, asection *input_section,
36591ba1
SL		 3652 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3653{
3654 /* This part is from bfd_elf_generic_reloc. */
3655 if (output_bfd != NULL
3656 && (symbol->flags & BSF_SECTION_SYM) == 0
3657 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3658 {
3659 reloc_entry->address += input_section->output_offset;
3660 return bfd_reloc_ok;
3661 }
3662
3663 if (output_bfd != NULL)
3664 /* FIXME: See bfd_perform_relocation. Is this right? */
3665 return bfd_reloc_continue;
3666
3667 return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto,
3668 input_section,
3669 data, reloc_entry->address,
3670 (symbol->value
3671 + symbol->section->output_section->vma
3672 + symbol->section->output_offset),
3673 reloc_entry->addend);
3674}
3675
1b786873 3676
36591ba1
SL		 3677/* Implement elf_backend_relocate_section. */
3678static bfd_boolean
3679nios2_elf32_relocate_section (bfd *output_bfd,
3680 struct bfd_link_info *info,
3681 bfd *input_bfd,
3682 asection *input_section,
3683 bfd_byte *contents,
3684 Elf_Internal_Rela *relocs,
3685 Elf_Internal_Sym *local_syms,
3686 asection **local_sections)
3687{
3688 Elf_Internal_Shdr *symtab_hdr;
3689 struct elf_link_hash_entry **sym_hashes;
3690 Elf_Internal_Rela *rel;
3691 Elf_Internal_Rela *relend;
3692 struct elf32_nios2_link_hash_table *htab;
3693 asection *sgot;
3694 asection *splt;
3695 asection *sreloc = NULL;
3696 bfd_vma *local_got_offsets;
82e91538 3697 bfd_vma got_base;
36591ba1
SL		 3698
3699 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3700 sym_hashes = elf_sym_hashes (input_bfd);
3701 relend = relocs + input_section->reloc_count;
3702
3703 htab = elf32_nios2_hash_table (info);
3704 sgot = htab->root.sgot;
3705 splt = htab->root.splt;
3706 local_got_offsets = elf_local_got_offsets (input_bfd);
3707
4ef97a1b 3708 if (htab->h_gp_got == NULL)
82e91538
SL		 3709 got_base = 0;
3710 else
4ef97a1b 3711 got_base = htab->h_gp_got->root.u.def.value;
82e91538 3712
36591ba1
SL		 3713 for (rel = relocs; rel < relend; rel++)
3714 {
3715 reloc_howto_type *howto;
3716 unsigned long r_symndx;
3717 Elf_Internal_Sym *sym;
3718 asection *sec;
3719 struct elf_link_hash_entry *h;
3720 struct elf32_nios2_link_hash_entry *eh;
3721 bfd_vma relocation;
3722 bfd_vma gp;
36591ba1
SL		 3723 bfd_reloc_status_type r = bfd_reloc_ok;
3724 const char *name = NULL;
3725 int r_type;
3726 const char *format;
a31b8bd9
AM		 3727 char *msgbuf = NULL;
3728 char *msg = NULL;
36591ba1
SL		 3729 bfd_boolean unresolved_reloc;
3730 bfd_vma off;
3731 int use_plt;
3732
3733 r_type = ELF32_R_TYPE (rel->r_info);
3734 r_symndx = ELF32_R_SYM (rel->r_info);
3735
8c163c5a 3736 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd);
36591ba1
SL		 3737 h = NULL;
3738 sym = NULL;
3739 sec = NULL;
3740
3741 if (r_symndx < symtab_hdr->sh_info)
3742 {
3743 sym = local_syms + r_symndx;
3744 sec = local_sections[r_symndx];
3745 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3746 }
3747 else
3748 {
62d887d4 3749 bfd_boolean warned, ignored;
36591ba1
SL		 3750
3751 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3752 r_symndx, symtab_hdr, sym_hashes,
3753 h, sec, relocation,
62d887d4 3754 unresolved_reloc, warned, ignored);
36591ba1
SL		 3755 }
3756
3757 if (sec && discarded_section (sec))
3758 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3759 rel, 1, relend, howto, 0, contents);
3760
3761 /* Nothing more to do unless this is a final link. */
0e1862bb 3762 if (bfd_link_relocatable (info))
36591ba1
SL		 3763 continue;
3764
36591ba1
SL		 3765 if (howto)
3766 {
31a53da5
L		 3767 bfd_boolean resolved_to_zero;
3768
3769 resolved_to_zero = (h != NULL
3770 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
36591ba1
SL		 3771 switch (howto->type)
3772 {
3773 case R_NIOS2_HI16:
3774 r = nios2_elf32_do_hi16_relocate (input_bfd, howto,
3775 input_section,
3776 contents, rel->r_offset,
3777 relocation, rel->r_addend);
3778 break;
3779 case R_NIOS2_LO16:
3780 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
3781 input_section,
3782 contents, rel->r_offset,
3783 relocation, rel->r_addend);
3784 break;
3785 case R_NIOS2_PCREL_LO:
3786 r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto,
3787 input_section,
3788 contents,
3789 rel->r_offset,
3790 relocation,
3791 rel->r_addend);
3792 break;
3793 case R_NIOS2_HIADJ16:
3794 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
3795 input_section, contents,
3796 rel->r_offset, relocation,
3797 rel->r_addend);
3798 break;
3799 case R_NIOS2_PCREL_HA:
3800 r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto,
3801 input_section,
3802 contents,
3803 rel->r_offset,
3804 relocation,
3805 rel->r_addend);
3806 break;
3807 case R_NIOS2_PCREL16:
3808 r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto,
3809 input_section, contents,
3810 rel->r_offset, relocation,
3811 rel->r_addend);
3812 break;
3813 case R_NIOS2_GPREL:
3814 /* Turns an absolute address into a gp-relative address. */
3815 if (!nios2_elf_assign_gp (output_bfd, &gp, info))
3816 {
a7be2893
SL		 3817 bfd_vma reloc_address;
3818
3819 if (sec && sec->output_section)
3820 reloc_address = (sec->output_section->vma
3821 + sec->output_offset
3822 + rel->r_offset);
3823 else
3824 reloc_address = 0;
3825
36591ba1 3826 format = _("global pointer relative relocation at address "
a31b8bd9 3827 "%#" PRIx64 " when _gp not defined\n");
34d75fb5
AM		 3828 if (asprintf (&msgbuf, format,
3829 (uint64_t) reloc_address) == -1)
3830 msgbuf = NULL;
36591ba1
SL		 3831 msg = msgbuf;
3832 r = bfd_reloc_dangerous;
3833 }
3834 else
3835 {
3836 bfd_vma symbol_address = rel->r_addend + relocation;
a7be2893 3837 relocation = symbol_address - gp;
36591ba1
SL		 3838 rel->r_addend = 0;
3839 if (((signed) relocation < -32768
3840 || (signed) relocation > 32767)
3841 && (!h
3842 || h->root.type == bfd_link_hash_defined
3843 || h->root.type == bfd_link_hash_defweak))
3844 {
a7be2893
SL		 3845 if (h)
3846 name = h->root.root.string;
a31b8bd9
AM		 3847 else
3848 {
3849 name = (bfd_elf_string_from_elf_section
3850 (input_bfd, symtab_hdr->sh_link,
3851 sym->st_name));
3852 if (name == NULL || *name == '\0')
fd361982 3853 name = bfd_section_name (sec);
a31b8bd9 3854 }
695344c0 3855 /* xgettext:c-format */
a31b8bd9
AM		 3856 format = _("unable to reach %s (at %#" PRIx64 ") from "
3857 "the global pointer (at %#" PRIx64 ") "
3858 "because the offset (%" PRId64 ") is out of "
3859 "the allowed range, -32678 to 32767\n" );
34d75fb5
AM		 3860 if (asprintf (&msgbuf, format, name,
3861 (uint64_t) symbol_address, (uint64_t) gp,
3862 (int64_t) relocation) == -1)
3863 msgbuf = NULL;
36591ba1
SL		 3864 msg = msgbuf;
3865 r = bfd_reloc_outofrange;
3866 }
3867 else
3868 r = _bfd_final_link_relocate (howto, input_bfd,
3869 input_section, contents,
3870 rel->r_offset, relocation,
3871 rel->r_addend);
3872 }
36591ba1
SL		 3873 break;
3874 case R_NIOS2_UJMP:
3875 r = nios2_elf32_do_ujmp_relocate (input_bfd, howto,
3876 input_section,
3877 contents, rel->r_offset,
3878 relocation, rel->r_addend);
3879 break;
3880 case R_NIOS2_CJMP:
3881 r = nios2_elf32_do_cjmp_relocate (input_bfd, howto,
3882 input_section,
3883 contents, rel->r_offset,
3884 relocation, rel->r_addend);
3885 break;
3886 case R_NIOS2_CALLR:
3887 r = nios2_elf32_do_callr_relocate (input_bfd, howto,
3888 input_section, contents,
3889 rel->r_offset, relocation,
3890 rel->r_addend);
3891 break;
3892 case R_NIOS2_CALL26:
78058a5e 3893 case R_NIOS2_CALL26_NOAT:
36591ba1
SL		 3894 /* If we have a call to an undefined weak symbol, we just want
3895 to stuff a zero in the bits of the call instruction and
3896 bypass the normal call26 relocation handling, because it'll
3897 diagnose an overflow error if address 0 isn't in the same
3898 256MB segment as the call site. Presumably the call
3899 should be guarded by a null check anyway. */
3900 if (h != NULL && h->root.type == bfd_link_hash_undefweak)
3901 {
3902 BFD_ASSERT (relocation == 0 && rel->r_addend == 0);
3903 r = _bfd_final_link_relocate (howto, input_bfd,
3904 input_section, contents,
3905 rel->r_offset, relocation,
3906 rel->r_addend);
3907 break;
3908 }
3909 /* Handle relocations which should use the PLT entry.
3910 NIOS2_BFD_RELOC_32 relocations will use the symbol's value,
3911 which may point to a PLT entry, but we don't need to handle
3912 that here. If we created a PLT entry, all branches in this
3913 object should go to it. */
3914 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
3915 {
3916 /* If we've created a .plt section, and assigned a PLT entry
3917 to this function, it should not be known to bind locally.
3918 If it were, we would have cleared the PLT entry. */
3919 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
3920
3921 relocation = (splt->output_section->vma
3922 + splt->output_offset
3923 + h->plt.offset);
3924
3925 unresolved_reloc = FALSE;
3926 }
78058a5e
SL		 3927 /* Detect R_NIOS2_CALL26 relocations that would overflow the
3928 256MB segment. Replace the target with a reference to a
3929 trampoline instead.
3930 Note that htab->stub_group is null if relaxation has been
3931 disabled by the --no-relax linker command-line option, so
3932 we can use that to skip this processing entirely. */
3933 if (howto->type == R_NIOS2_CALL26 && htab->stub_group)
3934 {
3935 bfd_vma dest = relocation + rel->r_addend;
3936 enum elf32_nios2_stub_type stub_type;
3937
3938 eh = (struct elf32_nios2_link_hash_entry *)h;
3939 stub_type = nios2_type_of_stub (input_section, rel, eh,
3940 htab, dest, NULL);
3941
3942 if (stub_type != nios2_stub_none)
3943 {
3944 struct elf32_nios2_stub_hash_entry *hsh;
3945
3946 hsh = nios2_get_stub_entry (input_section, sec,
3947 eh, rel, htab, stub_type);
3948 if (hsh == NULL)
3949 {
3950 r = bfd_reloc_undefined;
3951 break;
3952 }
3953
3954 dest = (hsh->stub_offset
3955 + hsh->stub_sec->output_offset
3956 + hsh->stub_sec->output_section->vma);
3957 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3958 input_section,
3959 contents,
3960 rel->r_offset,
3961 dest, 0);
3962 break;
3963 }
3964 }
3965
3966 /* Normal case. */
36591ba1
SL		 3967 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3968 input_section, contents,
3969 rel->r_offset, relocation,
3970 rel->r_addend);
3971 break;
3972 case R_NIOS2_ALIGN:
3973 r = bfd_reloc_ok;
3974 /* For symmetry this would be
3975 r = nios2_elf32_do_ignore_reloc (input_bfd, howto,
3976 input_section, contents,
3977 rel->r_offset, relocation,
3978 rel->r_addend);
3979 but do_ignore_reloc would do no more than return
3980 bfd_reloc_ok. */
3981 break;
3982
3983 case R_NIOS2_GOT16:
3984 case R_NIOS2_CALL16:
1c2de463
SL		 3985 case R_NIOS2_GOT_LO:
3986 case R_NIOS2_GOT_HA:
3987 case R_NIOS2_CALL_LO:
3988 case R_NIOS2_CALL_HA:
36591ba1
SL		 3989 /* Relocation is to the entry for this symbol in the
3990 global offset table. */
3991 if (sgot == NULL)
3992 {
3993 r = bfd_reloc_notsupported;
3994 break;
3995 }
3996
3997 use_plt = 0;
3998
3999 if (h != NULL)
4000 {
4001 bfd_boolean dyn;
4002
4003 eh = (struct elf32_nios2_link_hash_entry *)h;
1c2de463 4004 use_plt = (eh->got_types_used == CALL_USED
36591ba1
SL		 4005 && h->plt.offset != (bfd_vma) -1);
4006
4007 off = h->got.offset;
4008 BFD_ASSERT (off != (bfd_vma) -1);
4ef97a1b 4009 dyn = htab->root.dynamic_sections_created;
0e1862bb
L		 4010 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4011 bfd_link_pic (info),
4012 h)
4013 || (bfd_link_pic (info)
36591ba1 4014 && SYMBOL_REFERENCES_LOCAL (info, h))
31a53da5
L		 4015 || ((ELF_ST_VISIBILITY (h->other)
4016 || resolved_to_zero)
36591ba1
SL		 4017 && h->root.type == bfd_link_hash_undefweak))
4018 {
4019 /* This is actually a static link, or it is a -Bsymbolic
4020 link and the symbol is defined locally. We must
4021 initialize this entry in the global offset table.
4022 Since the offset must always be a multiple of 4, we
4023 use the least significant bit to record whether we
4024 have initialized it already.
4025
4026 When doing a dynamic link, we create a .rela.got
4027 relocation entry to initialize the value. This is
4028 done in the finish_dynamic_symbol routine. */
4029 if ((off & 1) != 0)
4030 off &= ~1;
4031 else
4032 {
4033 bfd_put_32 (output_bfd, relocation,
4034 sgot->contents + off);
4035 h->got.offset |= 1;
4036 }
4037 }
4038 else
4039 unresolved_reloc = FALSE;
4040 }
4041 else
4042 {
4043 BFD_ASSERT (local_got_offsets != NULL
4044 && local_got_offsets[r_symndx] != (bfd_vma) -1);
4045
4046 off = local_got_offsets[r_symndx];
4047
4048 /* The offset must always be a multiple of 4. We use the
4049 least significant bit to record whether we have already
4050 generated the necessary reloc. */
4051 if ((off & 1) != 0)
4052 off &= ~1;
4053 else
4054 {
4055 bfd_put_32 (output_bfd, relocation,
4056 sgot->contents + off);
4057
0e1862bb 4058 if (bfd_link_pic (info))
36591ba1
SL		 4059 {
4060 asection *srelgot;
4061 Elf_Internal_Rela outrel;
4062 bfd_byte *loc;
4063
4064 srelgot = htab->root.srelgot;
4065 BFD_ASSERT (srelgot != NULL);
4066
4067 outrel.r_addend = relocation;
4068 outrel.r_offset = (sgot->output_section->vma
4069 + sgot->output_offset
4070 + off);
4071 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4072 loc = srelgot->contents;
4073 loc += (srelgot->reloc_count++ *
4074 sizeof (Elf32_External_Rela));
4075 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4076 }
4077
4078 local_got_offsets[r_symndx] |= 1;
4079 }
4080 }
4081
0e1862bb 4082 if (use_plt && bfd_link_pic (info))
36591ba1
SL		 4083 {
4084 off = ((h->plt.offset - 24) / 12 + 3) * 4;
82e91538
SL		 4085 relocation = (htab->root.sgotplt->output_offset + off
4086 - got_base);
36591ba1
SL		 4087 }
4088 else
82e91538 4089 relocation = sgot->output_offset + off - got_base;
36591ba1
SL		 4090
4091 /* This relocation does not use the addend. */
4092 rel->r_addend = 0;
4093
1c2de463
SL		 4094 switch (howto->type)
4095 {
4096 case R_NIOS2_GOT_LO:
4097 case R_NIOS2_CALL_LO:
4098 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4099 input_section, contents,
4100 rel->r_offset, relocation,
4101 rel->r_addend);
4102 break;
4103 case R_NIOS2_GOT_HA:
4104 case R_NIOS2_CALL_HA:
4105 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4106 input_section, contents,
4107 rel->r_offset,
4108 relocation,
4109 rel->r_addend);
4110 break;
4111 default:
4112 r = _bfd_final_link_relocate (howto, input_bfd,
4113 input_section, contents,
4114 rel->r_offset, relocation,
4115 rel->r_addend);
4116 break;
4117 }
36591ba1
SL		 4118 break;
4119
4120 case R_NIOS2_GOTOFF_LO:
4121 case R_NIOS2_GOTOFF_HA:
4122 case R_NIOS2_GOTOFF:
82e91538 4123 /* Relocation is relative to the global offset table pointer. */
36591ba1
SL		 4124
4125 BFD_ASSERT (sgot != NULL);
4126 if (sgot == NULL)
4127 {
4128 r = bfd_reloc_notsupported;
4129 break;
4130 }
4131
d9972968
CLT		 4132 /* Note that sgot->output_offset is not involved in this
4133 calculation. We always want the start of .got. */
4134 relocation -= sgot->output_section->vma;
4135
4136 /* Now we adjust the relocation to be relative to the GOT pointer
4137 (the _gp_got symbol), which possibly contains the 0x8000 bias. */
4138 relocation -= got_base;
82e91538 4139
36591ba1
SL		 4140 switch (howto->type)
4141 {
4142 case R_NIOS2_GOTOFF_LO:
4143 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4144 input_section, contents,
4145 rel->r_offset, relocation,
4146 rel->r_addend);
4147 break;
4148 case R_NIOS2_GOTOFF_HA:
4149 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4150 input_section, contents,
4151 rel->r_offset,
4152 relocation,
4153 rel->r_addend);
4154 break;
4155 default:
4156 r = _bfd_final_link_relocate (howto, input_bfd,
4157 input_section, contents,
4158 rel->r_offset, relocation,
4159 rel->r_addend);
4160 break;
4161 }
4162 break;
4163
4164 case R_NIOS2_TLS_LDO16:
4165 relocation -= dtpoff_base (info) + DTP_OFFSET;
4166
4167 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4168 contents, rel->r_offset,
4169 relocation, rel->r_addend);
4170 break;
4171 case R_NIOS2_TLS_LDM16:
4172 if (htab->root.sgot == NULL)
4173 abort ();
4174
4175 off = htab->tls_ldm_got.offset;
4176
4177 if ((off & 1) != 0)
4178 off &= ~1;
4179 else
4180 {
4181 /* If we don't know the module number, create a relocation
4182 for it. */
0e1862bb 4183 if (bfd_link_pic (info))
36591ba1
SL		 4184 {
4185 Elf_Internal_Rela outrel;
4186 bfd_byte *loc;
4187
4188 if (htab->root.srelgot == NULL)
4189 abort ();
4190
4191 outrel.r_addend = 0;
4192 outrel.r_offset = (htab->root.sgot->output_section->vma
4193 + htab->root.sgot->output_offset
4194 + off);
4195 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD);
4196
4197 loc = htab->root.srelgot->contents;
4198 loc += (htab->root.srelgot->reloc_count++
4199 * sizeof (Elf32_External_Rela));
4200 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4201 }
4202 else
4203 bfd_put_32 (output_bfd, 1,
4204 htab->root.sgot->contents + off);
4205
4206 htab->tls_ldm_got.offset |= 1;
4207 }
4208
82e91538 4209 relocation = htab->root.sgot->output_offset + off - got_base;
36591ba1
SL		 4210
4211 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4212 contents, rel->r_offset,
4213 relocation, rel->r_addend);
4214
4215 break;
4216 case R_NIOS2_TLS_GD16:
4217 case R_NIOS2_TLS_IE16:
4218 {
4219 int indx;
4220 char tls_type;
4221
4222 if (htab->root.sgot == NULL)
4223 abort ();
4224
4225 indx = 0;
4226 if (h != NULL)
4227 {
4228 bfd_boolean dyn;
4229 dyn = htab->root.dynamic_sections_created;
0e1862bb
L		 4230 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4231 bfd_link_pic (info),
4232 h)
4233 && (!bfd_link_pic (info)
36591ba1
SL		 4234 || !SYMBOL_REFERENCES_LOCAL (info, h)))
4235 {
4236 unresolved_reloc = FALSE;
4237 indx = h->dynindx;
4238 }
4239 off = h->got.offset;
4240 tls_type = (((struct elf32_nios2_link_hash_entry *) h)
4241 ->tls_type);
4242 }
4243 else
4244 {
4245 if (local_got_offsets == NULL)
4246 abort ();
4247 off = local_got_offsets[r_symndx];
4248 tls_type = (elf32_nios2_local_got_tls_type (input_bfd)
4249 [r_symndx]);
4250 }
4251
4252 if (tls_type == GOT_UNKNOWN)
4253 abort ();
4254
4255 if ((off & 1) != 0)
4256 off &= ~1;
4257 else
4258 {
4259 bfd_boolean need_relocs = FALSE;
4260 Elf_Internal_Rela outrel;
4261 bfd_byte *loc = NULL;
4262 int cur_off = off;
4263
4264 /* The GOT entries have not been initialized yet. Do it
4265 now, and emit any relocations. If both an IE GOT and a
4266 GD GOT are necessary, we emit the GD first. */
4267
0e1862bb 4268 if ((bfd_link_pic (info) || indx != 0)
36591ba1 4269 && (h == NULL
31a53da5
L		 4270 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4271 && !resolved_to_zero)
36591ba1
SL		 4272 || h->root.type != bfd_link_hash_undefweak))
4273 {
4274 need_relocs = TRUE;
4275 if (htab->root.srelgot == NULL)
4276 abort ();
4277 loc = htab->root.srelgot->contents;
4278 loc += (htab->root.srelgot->reloc_count *
4279 sizeof (Elf32_External_Rela));
4280 }
4281
4282 if (tls_type & GOT_TLS_GD)
4283 {
4284 if (need_relocs)
4285 {
4286 outrel.r_addend = 0;
4287 outrel.r_offset = (htab->root.sgot->output_section->vma
4288 + htab->root.sgot->output_offset
4289 + cur_off);
4290 outrel.r_info = ELF32_R_INFO (indx,
4291 R_NIOS2_TLS_DTPMOD);
4292
4293 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4294 loc);
4295 htab->root.srelgot->reloc_count++;
4296 loc += sizeof (Elf32_External_Rela);
4297
4298 if (indx == 0)
4299 bfd_put_32 (output_bfd,
4300 (relocation - dtpoff_base (info) -
4301 DTP_OFFSET),
4302 htab->root.sgot->contents + cur_off + 4);
4303 else
4304 {
4305 outrel.r_addend = 0;
4306 outrel.r_info = ELF32_R_INFO (indx,
4307 R_NIOS2_TLS_DTPREL);
4308 outrel.r_offset += 4;
4309
4310 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4311 loc);
4312 htab->root.srelgot->reloc_count++;
4313 loc += sizeof (Elf32_External_Rela);
4314 }
4315 }
4316 else
4317 {
4318 /* If we are not emitting relocations for a
4319 general dynamic reference, then we must be in a
4320 static link or an executable link with the
4321 symbol binding locally. Mark it as belonging
4322 to module 1, the executable. */
4323 bfd_put_32 (output_bfd, 1,
4324 htab->root.sgot->contents + cur_off);
4325 bfd_put_32 (output_bfd, (relocation -
4326 dtpoff_base (info) -
4327 DTP_OFFSET),
4328 htab->root.sgot->contents + cur_off + 4);
4329 }
4330
4331 cur_off += 8;
4332 }
4333
4334 if (tls_type & GOT_TLS_IE)
4335 {
4336 if (need_relocs)
4337 {
4338 if (indx == 0)
4339 outrel.r_addend = (relocation -
4340 dtpoff_base (info));
4341 else
4342 outrel.r_addend = 0;
4343 outrel.r_offset = (htab->root.sgot->output_section->vma
4344 + htab->root.sgot->output_offset
4345 + cur_off);
4346 outrel.r_info = ELF32_R_INFO (indx,
4347 R_NIOS2_TLS_TPREL);
4348
4349 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4350 loc);
4351 htab->root.srelgot->reloc_count++;
4352 loc += sizeof (Elf32_External_Rela);
4353 }
4354 else
4355 bfd_put_32 (output_bfd, (tpoff (info, relocation)
4356 - TP_OFFSET),
4357 htab->root.sgot->contents + cur_off);
4358 cur_off += 4;
4359 }
4360
4361 if (h != NULL)
4362 h->got.offset |= 1;
4363 else
4364 local_got_offsets[r_symndx] |= 1;
4365 }
4366
4367 if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16)
4368 off += 8;
82e91538 4369 relocation = htab->root.sgot->output_offset + off - got_base;
36591ba1
SL		 4370
4371 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4372 contents, rel->r_offset,
4373 relocation, rel->r_addend);
4374 }
4375
4376 break;
4377 case R_NIOS2_TLS_LE16:
3cbc1e5e 4378 if (bfd_link_dll (info))
36591ba1 4379 {
4eca0228 4380 _bfd_error_handler
695344c0 4381 /* xgettext:c-format */
2dcf00ce 4382 (_("%pB(%pA+%#" PRIx64 "): %s relocation not "
36591ba1
SL		 4383 "permitted in shared object"),
4384 input_bfd, input_section,
2dcf00ce 4385 (uint64_t) rel->r_offset, howto->name);
36591ba1
SL		 4386 return FALSE;
4387 }
4388 else
4389 relocation = tpoff (info, relocation) - TP_OFFSET;
4390
4391 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4392 contents, rel->r_offset,
4393 relocation, rel->r_addend);
4394 break;
4395
4396 case R_NIOS2_BFD_RELOC_32:
0e1862bb 4397 if (bfd_link_pic (info)
36591ba1
SL		 4398 && (input_section->flags & SEC_ALLOC) != 0
4399 && (h == NULL
31a53da5
L		 4400 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4401 && !resolved_to_zero)
36591ba1
SL		 4402 || h->root.type != bfd_link_hash_undefweak))
4403 {
4404 Elf_Internal_Rela outrel;
4405 bfd_byte *loc;
4406 bfd_boolean skip, relocate;
4407
4408 /* When generating a shared object, these relocations
4409 are copied into the output file to be resolved at run
4410 time. */
4411
4412 skip = FALSE;
4413 relocate = FALSE;
4414
4415 outrel.r_offset
4416 = _bfd_elf_section_offset (output_bfd, info,
4417 input_section, rel->r_offset);
4418 if (outrel.r_offset == (bfd_vma) -1)
4419 skip = TRUE;
4420 else if (outrel.r_offset == (bfd_vma) -2)
4421 skip = TRUE, relocate = TRUE;
4422 outrel.r_offset += (input_section->output_section->vma
4423 + input_section->output_offset);
4424
4425 if (skip)
4426 memset (&outrel, 0, sizeof outrel);
4427 else if (h != NULL
4428 && h->dynindx != -1
0e1862bb 4429 && (!bfd_link_pic (info)
a496fbc8 4430 || !SYMBOLIC_BIND (info, h)
36591ba1
SL		 4431 || !h->def_regular))
4432 {
4433 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4434 outrel.r_addend = rel->r_addend;
4435 }
4436 else
4437 {
4438 /* This symbol is local, or marked to become local. */
4439 outrel.r_addend = relocation + rel->r_addend;
4440 relocate = TRUE;
4441 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4442 }
4443
4444 sreloc = elf_section_data (input_section)->sreloc;
4445 if (sreloc == NULL)
4446 abort ();
4447
4448 loc = sreloc->contents;
4449 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4450 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4451
4452 /* This reloc will be computed at runtime, so there's no
4453 need to do anything now, except for R_NIOS2_BFD_RELOC_32
4454 relocations that have been turned into
4455 R_NIOS2_RELATIVE. */
4456 if (!relocate)
4457 break;
4458 }
4459
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 case R_NIOS2_TLS_DTPREL:
4467 relocation -= dtpoff_base (info);
4468 /* Fall through. */
4469
4470 default:
4471 r = _bfd_final_link_relocate (howto, input_bfd,
4472 input_section, contents,
4473 rel->r_offset, relocation,
4474 rel->r_addend);
4475 break;
4476 }
4477 }
4478 else
4479 r = bfd_reloc_notsupported;
4480
4481 if (r != bfd_reloc_ok)
4482 {
4483 if (h != NULL)
4484 name = h->root.root.string;
4485 else
4486 {
4487 name = bfd_elf_string_from_elf_section (input_bfd,
4488 symtab_hdr->sh_link,
4489 sym->st_name);
4490 if (name == NULL || *name == '\0')
fd361982 4491 name = bfd_section_name (sec);
36591ba1
SL		 4492 }
4493
4494 switch (r)
4495 {
4496 case bfd_reloc_overflow:
1a72702b
AM		 4497 (*info->callbacks->reloc_overflow) (info, NULL, name,
4498 howto->name, (bfd_vma) 0,
4499 input_bfd, input_section,
4500 rel->r_offset);
36591ba1
SL		 4501 break;
4502
4503 case bfd_reloc_undefined:
1a72702b
AM		 4504 (*info->callbacks->undefined_symbol) (info, name, input_bfd,
4505 input_section,
4506 rel->r_offset, TRUE);
36591ba1
SL		 4507 break;
4508
4509 case bfd_reloc_outofrange:
4510 if (msg == NULL)
4511 msg = _("relocation out of range");
4512 break;
4513
4514 case bfd_reloc_notsupported:
4515 if (msg == NULL)
4516 msg = _("unsupported relocation");
4517 break;
4518
4519 case bfd_reloc_dangerous:
4520 if (msg == NULL)
4521 msg = _("dangerous relocation");
4522 break;
4523
4524 default:
4525 if (msg == NULL)
4526 msg = _("unknown error");
4527 break;
4528 }
4529
4530 if (msg)
4531 {
1a72702b
AM		 4532 (*info->callbacks->warning) (info, msg, name, input_bfd,
4533 input_section, rel->r_offset);
c9594989 4534 free (msgbuf);
36591ba1
SL		 4535 return FALSE;
4536 }
4537 }
4538 }
4539 return TRUE;
4540}
4541
4542/* Implement elf-backend_section_flags:
4543 Convert NIOS2 specific section flags to bfd internal section flags. */
4544static bfd_boolean
8c803a2d 4545nios2_elf32_section_flags (const Elf_Internal_Shdr *hdr)
36591ba1
SL		 4546{
4547 if (hdr->sh_flags & SHF_NIOS2_GPREL)
8c803a2d 4548 hdr->bfd_section->flags |= SEC_SMALL_DATA;
36591ba1
SL		 4549
4550 return TRUE;
4551}
4552
4553/* Implement elf_backend_fake_sections:
4554 Set the correct type for an NIOS2 ELF section. We do this by the
4555 section name, which is a hack, but ought to work. */
4556static bfd_boolean
4557nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
4558 Elf_Internal_Shdr *hdr, asection *sec)
4559{
fd361982 4560 const char *name = bfd_section_name (sec);
36591ba1
SL		 4561
4562 if ((sec->flags & SEC_SMALL_DATA)
4563 || strcmp (name, ".sdata") == 0
4564 || strcmp (name, ".sbss") == 0
4565 || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0)
4566 hdr->sh_flags |= SHF_NIOS2_GPREL;
4567
4568 return TRUE;
4569}
4570
4571/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
4572 shortcuts to them in our hash table. */
4573static bfd_boolean
4574create_got_section (bfd *dynobj, struct bfd_link_info *info)
4575{
4576 struct elf32_nios2_link_hash_table *htab;
82e91538 4577 struct elf_link_hash_entry *h;
36591ba1
SL		 4578
4579 htab = elf32_nios2_hash_table (info);
4580
4581 if (! _bfd_elf_create_got_section (dynobj, info))
4582 return FALSE;
4583
4584 /* In order for the two loads in .PLTresolve to share the same %hiadj,
4585 _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */
fd361982 4586 if (!bfd_set_section_alignment (htab->root.sgotplt, 4))
36591ba1
SL		 4587 return FALSE;
4588
82e91538
SL		 4589 /* The Nios II ABI specifies that GOT-relative relocations are relative
4590 to the linker-created symbol _gp_got, rather than using
4591 _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always
4592 points to the base of the GOT while _gp_got may include a bias. */
4593 h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt,
4594 "_gp_got");
4ef97a1b 4595 htab->h_gp_got = h;
82e91538
SL		 4596 if (h == NULL)
4597 return FALSE;
4598
36591ba1
SL		 4599 return TRUE;
4600}
4601
4602/* Implement elf_backend_create_dynamic_sections:
4603 Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
4604 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
4605 hash table. */
4606static bfd_boolean
4607nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4608{
4609 struct elf32_nios2_link_hash_table *htab;
4610
4611 htab = elf32_nios2_hash_table (info);
4612 if (!htab->root.sgot && !create_got_section (dynobj, info))
4613 return FALSE;
4614
9d19e4fd
AM		 4615 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4616 return FALSE;
36591ba1
SL		 4617
4618 /* In order for the two loads in a shared object .PLTresolve to share the
4619 same %hiadj, the start of the PLT (as well as the GOT) must be aligned
4620 to a 16-byte boundary. This is because the addresses for these loads
4621 include the -(.plt+4) PIC correction. */
fd361982 4622 return bfd_set_section_alignment (htab->root.splt, 4);
36591ba1
SL		 4623}
4624
4625/* Implement elf_backend_copy_indirect_symbol:
4626 Copy the extra info we tack onto an elf_link_hash_entry. */
4627static void
4628nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info,
4629 struct elf_link_hash_entry *dir,
4630 struct elf_link_hash_entry *ind)
4631{
4632 struct elf32_nios2_link_hash_entry *edir, *eind;
4633
4634 edir = (struct elf32_nios2_link_hash_entry *) dir;
4635 eind = (struct elf32_nios2_link_hash_entry *) ind;
4636
36591ba1
SL		 4637 if (ind->root.type == bfd_link_hash_indirect
4638 && dir->got.refcount <= 0)
4639 {
4640 edir->tls_type = eind->tls_type;
4641 eind->tls_type = GOT_UNKNOWN;
4642 }
4643
4644 edir->got_types_used |= eind->got_types_used;
4645
4646 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
4647}
4648
965b1d80
SL		 4649/* Set the right machine number for a NIOS2 ELF file. */
4650
4651static bfd_boolean
4652nios2_elf32_object_p (bfd *abfd)
4653{
4654 unsigned long mach;
4655
4656 mach = elf_elfheader (abfd)->e_flags;
4657
4658 switch (mach)
4659 {
4660 default:
4661 case EF_NIOS2_ARCH_R1:
4662 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1);
4663 break;
4664 case EF_NIOS2_ARCH_R2:
4665 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2);
4666 break;
4667 }
4668
4669 return TRUE;
4670}
4671
36591ba1
SL		 4672/* Implement elf_backend_check_relocs:
4673 Look through the relocs for a section during the first phase. */
4674static bfd_boolean
4675nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
4676 asection *sec, const Elf_Internal_Rela *relocs)
4677{
36591ba1
SL		 4678 Elf_Internal_Shdr *symtab_hdr;
4679 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4680 const Elf_Internal_Rela *rel;
4681 const Elf_Internal_Rela *rel_end;
4682 struct elf32_nios2_link_hash_table *htab;
36591ba1
SL		 4683 asection *sreloc = NULL;
4684 bfd_signed_vma *local_got_refcounts;
4685
0e1862bb 4686 if (bfd_link_relocatable (info))
36591ba1
SL		 4687 return TRUE;
4688
36591ba1
SL		 4689 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4690 sym_hashes = elf_sym_hashes (abfd);
4691 sym_hashes_end = (sym_hashes
4692 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
4693 if (!elf_bad_symtab (abfd))
4694 sym_hashes_end -= symtab_hdr->sh_info;
4695 local_got_refcounts = elf_local_got_refcounts (abfd);
4696
4697 htab = elf32_nios2_hash_table (info);
36591ba1
SL		 4698
4699 rel_end = relocs + sec->reloc_count;
4700 for (rel = relocs; rel < rel_end; rel++)
4701 {
4702 unsigned int r_type;
4703 struct elf_link_hash_entry *h;
4704 unsigned long r_symndx;
4705
4706 r_symndx = ELF32_R_SYM (rel->r_info);
4707 if (r_symndx < symtab_hdr->sh_info)
4708 h = NULL;
4709 else
4710 {
4711 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4712 while (h->root.type == bfd_link_hash_indirect
4713 || h->root.type == bfd_link_hash_warning)
4714 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4715 }
4716
4717 r_type = ELF32_R_TYPE (rel->r_info);
4718
4719 switch (r_type)
4720 {
4721 case R_NIOS2_GOT16:
1c2de463
SL		 4722 case R_NIOS2_GOT_LO:
4723 case R_NIOS2_GOT_HA:
36591ba1 4724 case R_NIOS2_CALL16:
1c2de463
SL		 4725 case R_NIOS2_CALL_LO:
4726 case R_NIOS2_CALL_HA:
36591ba1
SL		 4727 case R_NIOS2_TLS_GD16:
4728 case R_NIOS2_TLS_IE16:
4729 /* This symbol requires a global offset table entry. */
4730 {
4731 int tls_type, old_tls_type;
4732
4733 switch (r_type)
4734 {
4735 default:
4736 case R_NIOS2_GOT16:
1c2de463
SL		 4737 case R_NIOS2_GOT_LO:
4738 case R_NIOS2_GOT_HA:
36591ba1 4739 case R_NIOS2_CALL16:
1c2de463
SL		 4740 case R_NIOS2_CALL_LO:
4741 case R_NIOS2_CALL_HA:
36591ba1
SL		 4742 tls_type = GOT_NORMAL;
4743 break;
4744 case R_NIOS2_TLS_GD16:
4745 tls_type = GOT_TLS_GD;
4746 break;
4747 case R_NIOS2_TLS_IE16:
4748 tls_type = GOT_TLS_IE;
4749 break;
4750 }
4751
36591ba1
SL		 4752 if (h != NULL)
4753 {
4754 struct elf32_nios2_link_hash_entry *eh
4755 = (struct elf32_nios2_link_hash_entry *)h;
4756 h->got.refcount++;
4757 old_tls_type = elf32_nios2_hash_entry(h)->tls_type;
1c2de463
SL		 4758 if (r_type == R_NIOS2_CALL16
4759 || r_type == R_NIOS2_CALL_LO
4760 || r_type == R_NIOS2_CALL_HA)
36591ba1
SL		 4761 {
4762 /* Make sure a plt entry is created for this symbol if
4763 it turns out to be a function defined by a dynamic
4764 object. */
4765 h->plt.refcount++;
4766 h->needs_plt = 1;
4767 h->type = STT_FUNC;
1c2de463 4768 eh->got_types_used |= CALL_USED;
36591ba1
SL		 4769 }
4770 else
1c2de463 4771 eh->got_types_used |= GOT_USED;
36591ba1
SL		 4772 }
4773 else
4774 {
4775 /* This is a global offset table entry for a local symbol. */
4776 if (local_got_refcounts == NULL)
4777 {
4778 bfd_size_type size;
4779
4780 size = symtab_hdr->sh_info;
4781 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4782 local_got_refcounts
4783 = ((bfd_signed_vma *) bfd_zalloc (abfd, size));
4784 if (local_got_refcounts == NULL)
4785 return FALSE;
4786 elf_local_got_refcounts (abfd) = local_got_refcounts;
4787 elf32_nios2_local_got_tls_type (abfd)
4788 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4789 }
4790 local_got_refcounts[r_symndx]++;
4791 old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx];
4792 }
4793
4794 /* We will already have issued an error message if there is a
4795 TLS / non-TLS mismatch, based on the symbol type. We don't
4796 support any linker relaxations. So just combine any TLS
4797 types needed. */
4798 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4799 && tls_type != GOT_NORMAL)
4800 tls_type |= old_tls_type;
4801
4802 if (old_tls_type != tls_type)
4803 {
4804 if (h != NULL)
4805 elf32_nios2_hash_entry (h)->tls_type = tls_type;
4806 else
4807 elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type;
4808 }
4809 }
4ef97a1b 4810 make_got:
36591ba1
SL		 4811 if (htab->root.sgot == NULL)
4812 {
4813 if (htab->root.dynobj == NULL)
4814 htab->root.dynobj = abfd;
4815 if (!create_got_section (htab->root.dynobj, info))
4816 return FALSE;
4817 }
4818 break;
4819
4ef97a1b
AM		 4820 case R_NIOS2_TLS_LDM16:
4821 htab->tls_ldm_got.refcount++;
4822 goto make_got;
4823
36591ba1
SL		 4824 /* This relocation describes the C++ object vtable hierarchy.
4825 Reconstruct it for later use during GC. */
4826 case R_NIOS2_GNU_VTINHERIT:
4827 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4828 return FALSE;
4829 break;
4830
4831 /* This relocation describes which C++ vtable entries are actually
4832 used. Record for later use during GC. */
4833 case R_NIOS2_GNU_VTENTRY:
4834 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4835 return FALSE;
4836 break;
4837
4838 case R_NIOS2_BFD_RELOC_32:
4839 case R_NIOS2_CALL26:
78058a5e 4840 case R_NIOS2_CALL26_NOAT:
36591ba1
SL		 4841 case R_NIOS2_HIADJ16:
4842 case R_NIOS2_LO16:
4843
4844 if (h != NULL)
4845 {
4846 /* If this reloc is in a read-only section, we might
4847 need a copy reloc. We can't check reliably at this
4848 stage whether the section is read-only, as input
4849 sections have not yet been mapped to output sections.
4850 Tentatively set the flag for now, and correct in
4851 adjust_dynamic_symbol. */
0e1862bb 4852 if (!bfd_link_pic (info))
36591ba1
SL		 4853 h->non_got_ref = 1;
4854
4855 /* Make sure a plt entry is created for this symbol if it
4856 turns out to be a function defined by a dynamic object. */
4857 h->plt.refcount++;
4858
78058a5e 4859 if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT)
36591ba1
SL		 4860 h->needs_plt = 1;
4861 }
4862
4863 /* If we are creating a shared library, we need to copy the
4864 reloc into the shared library. */
0e1862bb 4865 if (bfd_link_pic (info)
36591ba1
SL		 4866 && (sec->flags & SEC_ALLOC) != 0
4867 && (r_type == R_NIOS2_BFD_RELOC_32
4868 || (h != NULL && ! h->needs_plt
a496fbc8 4869 && (! SYMBOLIC_BIND (info, h) || ! h->def_regular))))
36591ba1 4870 {
3bf083ed
AM		 4871 struct elf_dyn_relocs *p;
4872 struct elf_dyn_relocs **head;
36591ba1
SL		 4873
4874 /* When creating a shared object, we must copy these
4875 reloc types into the output file. We create a reloc
4876 section in dynobj and make room for this reloc. */
4877 if (sreloc == NULL)
4878 {
4ef97a1b
AM		 4879 if (htab->root.dynobj == NULL)
4880 htab->root.dynobj = abfd;
4881
36591ba1 4882 sreloc = _bfd_elf_make_dynamic_reloc_section
4ef97a1b 4883 (sec, htab->root.dynobj, 2, abfd, TRUE);
36591ba1
SL		 4884 if (sreloc == NULL)
4885 return FALSE;
4886 }
4887
4888 /* If this is a global symbol, we count the number of
4889 relocations we need for this symbol. */
4890 if (h != NULL)
190eb1dd 4891 head = &h->dyn_relocs;
36591ba1
SL		 4892 else
4893 {
4894 /* Track dynamic relocs needed for local syms too.
4895 We really need local syms available to do this
4896 easily. Oh well. */
4897
4898 asection *s;
4899 void *vpp;
4900 Elf_Internal_Sym *isym;
4901
f1dfbfdb 4902 isym = bfd_sym_from_r_symndx (&htab->root.sym_cache,
36591ba1
SL		 4903 abfd, r_symndx);
4904 if (isym == NULL)
4905 return FALSE;
4906
4907 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4908 if (s == NULL)
4909 s = sec;
4910
4911 vpp = &elf_section_data (s)->local_dynrel;
3bf083ed 4912 head = (struct elf_dyn_relocs **) vpp;
36591ba1
SL		 4913 }
4914
4915 p = *head;
4916 if (p == NULL || p->sec != sec)
4917 {
986f0783 4918 size_t amt = sizeof *p;
3bf083ed 4919 p = ((struct elf_dyn_relocs *)
36591ba1
SL		 4920 bfd_alloc (htab->root.dynobj, amt));
4921 if (p == NULL)
4922 return FALSE;
4923 p->next = *head;
4924 *head = p;
4925 p->sec = sec;
4926 p->count = 0;
4927 p->pc_count = 0;
4928 }
4929
4930 p->count += 1;
4931
4932 }
4933 break;
4934 }
4935 }
4936
4937 return TRUE;
4938}
4939
4940
4941/* Implement elf_backend_gc_mark_hook:
4942 Return the section that should be marked against GC for a given
4943 relocation. */
4944static asection *
4945nios2_elf32_gc_mark_hook (asection *sec,
25153ba0 4946 struct bfd_link_info *info,
36591ba1
SL		 4947 Elf_Internal_Rela *rel,
4948 struct elf_link_hash_entry *h,
4949 Elf_Internal_Sym *sym)
4950{
4951 if (h != NULL)
4952 switch (ELF32_R_TYPE (rel->r_info))
4953 {
4954 case R_NIOS2_GNU_VTINHERIT:
4955 case R_NIOS2_GNU_VTENTRY:
4956 return NULL;
4957 }
4958 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4959}
4960
36591ba1
SL		 4961/* Implement elf_backend_finish_dynamic_symbols:
4962 Finish up dynamic symbol handling. We set the contents of various
4963 dynamic sections here. */
4964static bfd_boolean
4965nios2_elf32_finish_dynamic_symbol (bfd *output_bfd,
4966 struct bfd_link_info *info,
4967 struct elf_link_hash_entry *h,
4968 Elf_Internal_Sym *sym)
4969{
4970 struct elf32_nios2_link_hash_table *htab;
4971 struct elf32_nios2_link_hash_entry *eh
4972 = (struct elf32_nios2_link_hash_entry *)h;
4973 int use_plt;
4974
4975 htab = elf32_nios2_hash_table (info);
4976
4977 if (h->plt.offset != (bfd_vma) -1)
4978 {
4979 asection *splt;
4980 asection *sgotplt;
4981 asection *srela;
4982 bfd_vma plt_index;
4983 bfd_vma got_offset;
4984 Elf_Internal_Rela rela;
4985 bfd_byte *loc;
4986 bfd_vma got_address;
4987
4988 /* This symbol has an entry in the procedure linkage table. Set
4989 it up. */
4990 BFD_ASSERT (h->dynindx != -1);
4991 splt = htab->root.splt;
4992 sgotplt = htab->root.sgotplt;
4993 srela = htab->root.srelplt;
4994 BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL);
4995
4996 /* Emit the PLT entry. */
0e1862bb 4997 if (bfd_link_pic (info))
36591ba1
SL		 4998 {
4999 nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset,
5000 3);
5001 plt_index = (h->plt.offset - 24) / 12;
5002 got_offset = (plt_index + 3) * 4;
5003 nios2_elf32_install_imm16 (splt, h->plt.offset,
5004 hiadj(plt_index * 4));
5005 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5006 (plt_index * 4) & 0xffff);
5007 nios2_elf32_install_imm16 (splt, h->plt.offset + 8,
5008 0xfff4 - h->plt.offset);
5009 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5010 + got_offset);
5011
5012 /* Fill in the entry in the global offset table. There are no
5013 res_n slots for a shared object PLT, instead the .got.plt entries
5014 point to the PLT entries. */
5015 bfd_put_32 (output_bfd,
5016 splt->output_section->vma + splt->output_offset
5017 + h->plt.offset, sgotplt->contents + got_offset);
5018 }
5019 else
5020 {
5021 plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12;
5022 got_offset = (plt_index + 3) * 4;
5023
5024 nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3);
5025 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5026 + got_offset);
5027 nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address));
5028 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5029 got_address & 0xffff);
5030
5031 /* Fill in the entry in the global offset table. */
5032 bfd_put_32 (output_bfd,
5033 splt->output_section->vma + splt->output_offset
5034 + plt_index * 4, sgotplt->contents + got_offset);
5035 }
5036
5037 /* Fill in the entry in the .rela.plt section. */
5038 rela.r_offset = got_address;
5039 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT);
5040 rela.r_addend = 0;
5041 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
5042 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5043
5044 if (!h->def_regular)
5045 {
5046 /* Mark the symbol as undefined, rather than as defined in
5047 the .plt section. Leave the value alone. */
5048 sym->st_shndx = SHN_UNDEF;
5049 /* If the symbol is weak, we do need to clear the value.
5050 Otherwise, the PLT entry would provide a definition for
5051 the symbol even if the symbol wasn't defined anywhere,
5052 and so the symbol would never be NULL. */
5053 if (!h->ref_regular_nonweak)
5054 sym->st_value = 0;
5055 }
5056 }
5057
1c2de463 5058 use_plt = (eh->got_types_used == CALL_USED
36591ba1
SL		 5059 && h->plt.offset != (bfd_vma) -1);
5060
5061 if (!use_plt && h->got.offset != (bfd_vma) -1
5062 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
5063 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
5064 {
5065 asection *sgot;
5066 asection *srela;
5067 Elf_Internal_Rela rela;
5068 bfd_byte *loc;
5069 bfd_vma offset;
5070
5071 /* This symbol has an entry in the global offset table. Set it
5072 up. */
5073 sgot = htab->root.sgot;
5074 srela = htab->root.srelgot;
5075 BFD_ASSERT (sgot != NULL && srela != NULL);
5076
5077 offset = (h->got.offset & ~(bfd_vma) 1);
5078 rela.r_offset = (sgot->output_section->vma
5079 + sgot->output_offset + offset);
5080
5081 /* If this is a -Bsymbolic link, and the symbol is defined
5082 locally, we just want to emit a RELATIVE reloc. Likewise if
5083 the symbol was forced to be local because of a version file.
5084 The entry in the global offset table will already have been
5085 initialized in the relocate_section function. */
5086
0e1862bb 5087 if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
36591ba1
SL		 5088 {
5089 rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
5090 rela.r_addend = bfd_get_signed_32 (output_bfd,
5091 (sgot->contents + offset));
5092 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
5093 }
5094 else
5095 {
5096 bfd_put_32 (output_bfd, (bfd_vma) 0,
5097 sgot->contents + offset);
5098 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT);
5099 rela.r_addend = 0;
5100 }
5101
5102 loc = srela->contents;
5103 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5104 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5105 }
5106
5107 if (use_plt && h->got.offset != (bfd_vma) -1)
5108 {
5109 bfd_vma offset = (h->got.offset & ~(bfd_vma) 1);
5110 asection *sgot = htab->root.sgot;
5111 asection *splt = htab->root.splt;
5112 bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset
5113 + h->plt.offset),
5114 sgot->contents + offset);
5115 }
5116
5117 if (h->needs_copy)
5118 {
5119 asection *s;
5120 Elf_Internal_Rela rela;
5121 bfd_byte *loc;
5122
5123 /* This symbol needs a copy reloc. Set it up. */
5124 BFD_ASSERT (h->dynindx != -1
5125 && (h->root.type == bfd_link_hash_defined
5126 || h->root.type == bfd_link_hash_defweak));
5127
36591ba1
SL		 5128 rela.r_offset = (h->root.u.def.value
5129 + h->root.u.def.section->output_section->vma
5130 + h->root.u.def.section->output_offset);
5131 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY);
5132 rela.r_addend = 0;
afbf7e8e 5133 if (h->root.u.def.section == htab->root.sdynrelro)
5474d94f
AM		 5134 s = htab->root.sreldynrelro;
5135 else
5136 s = htab->root.srelbss;
5137 BFD_ASSERT (s != NULL);
36591ba1
SL		 5138 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5139 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5140 }
5141
82e91538 5142 /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */
36591ba1 5143 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4ef97a1b
AM		 5144 || h == htab->root.hgot
5145 || h == htab->h_gp_got)
36591ba1
SL		 5146 sym->st_shndx = SHN_ABS;
5147
5148 return TRUE;
5149}
5150
5151/* Implement elf_backend_finish_dynamic_sections. */
5152static bfd_boolean
5153nios2_elf32_finish_dynamic_sections (bfd *output_bfd,
5154 struct bfd_link_info *info)
5155{
36591ba1
SL		 5156 asection *sgotplt;
5157 asection *sdyn;
5158 struct elf32_nios2_link_hash_table *htab;
5159
5160 htab = elf32_nios2_hash_table (info);
36591ba1 5161 sgotplt = htab->root.sgotplt;
4ef97a1b 5162 sdyn = NULL;
36591ba1 5163
4ef97a1b 5164 if (htab->root.dynamic_sections_created)
36591ba1
SL		 5165 {
5166 asection *splt;
5167 Elf32_External_Dyn *dyncon, *dynconend;
5168
5169 splt = htab->root.splt;
4ef97a1b
AM		 5170 sdyn = bfd_get_linker_section (htab->root.dynobj, ".dynamic");
5171 BFD_ASSERT (splt != NULL && sdyn != NULL && sgotplt != NULL);
36591ba1
SL		 5172
5173 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5174 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5175 for (; dyncon < dynconend; dyncon++)
5176 {
5177 Elf_Internal_Dyn dyn;
5178 asection *s;
5179
4ef97a1b 5180 bfd_elf32_swap_dyn_in (htab->root.dynobj, dyncon, &dyn);
36591ba1
SL		 5181
5182 switch (dyn.d_tag)
5183 {
5184 default:
5185 break;
5186
5187 case DT_PLTGOT:
4ade44b7
AM		 5188 s = htab->root.sgotplt;
5189 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
36591ba1
SL		 5190 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5191 break;
5192
5193 case DT_JMPREL:
5194 s = htab->root.srelplt;
4ade44b7 5195 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
36591ba1
SL		 5196 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5197 break;
5198
5199 case DT_PLTRELSZ:
5200 s = htab->root.srelplt;
36591ba1
SL		 5201 dyn.d_un.d_val = s->size;
5202 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5203 break;
5204
36591ba1 5205 case DT_NIOS2_GP:
4ade44b7
AM		 5206 s = htab->root.sgotplt;
5207 dyn.d_un.d_ptr
5208 = s->output_section->vma + s->output_offset + 0x7ff0;
36591ba1
SL		 5209 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5210 break;
5211 }
5212 }
5213
5214 /* Fill in the first entry in the procedure linkage table. */
5215 if (splt->size > 0)
5216 {
5217 bfd_vma got_address = (sgotplt->output_section->vma
5218 + sgotplt->output_offset);
0e1862bb 5219 if (bfd_link_pic (info))
36591ba1 5220 {
33d4099f
SL		 5221 bfd_vma got_pcrel = got_address - (splt->output_section->vma
5222 + splt->output_offset);
5223 /* Both GOT and PLT must be aligned to a 16-byte boundary
5224 for the two loads to share the %hiadj part. The 4-byte
5225 offset for nextpc is accounted for in the %lo offsets
5226 on the loads. */
5227 BFD_ASSERT ((got_pcrel & 0xf) == 0);
36591ba1 5228 nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6);
33d4099f
SL		 5229 nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel));
5230 nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff);
5231 nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff);
36591ba1
SL		 5232 }
5233 else
5234 {
5235 /* Divide by 4 here, not 3 because we already corrected for the
5236 res_N branches. */
5237 bfd_vma res_size = (splt->size - 28) / 4;
5238 bfd_vma res_start = (splt->output_section->vma
5239 + splt->output_offset);
5240 bfd_vma res_offset;
5241
5242 for (res_offset = 0; res_offset < res_size; res_offset += 4)
5243 bfd_put_32 (output_bfd,
5244 6 | ((res_size - (res_offset + 4)) << 6),
5245 splt->contents + res_offset);
5246
33d4099f
SL		 5247 /* The GOT must be aligned to a 16-byte boundary for the
5248 two loads to share the same %hiadj part. */
5249 BFD_ASSERT ((got_address & 0xf) == 0);
5250
36591ba1
SL		 5251 nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7);
5252 nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start));
5253 nios2_elf32_install_imm16 (splt, res_size + 4,
5254 res_start & 0xffff);
5255 nios2_elf32_install_imm16 (splt, res_size + 12,
5256 hiadj (got_address));
5257 nios2_elf32_install_imm16 (splt, res_size + 16,
33d4099f 5258 (got_address + 4) & 0xffff);
36591ba1 5259 nios2_elf32_install_imm16 (splt, res_size + 20,
33d4099f 5260 (got_address + 8) & 0xffff);
36591ba1
SL		 5261 }
5262 }
5263 }
4ef97a1b 5264
36591ba1 5265 /* Fill in the first three entries in the global offset table. */
4ef97a1b 5266 if (sgotplt != NULL && sgotplt->size > 0)
36591ba1
SL		 5267 {
5268 if (sdyn == NULL)
5269 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents);
5270 else
5271 bfd_put_32 (output_bfd,
5272 sdyn->output_section->vma + sdyn->output_offset,
5273 sgotplt->contents);
5274 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4);
5275 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8);
36591ba1 5276
4ef97a1b
AM		 5277 if (sgotplt->output_section != bfd_abs_section_ptr)
5278 elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4;
5279 }
36591ba1
SL		 5280
5281 return TRUE;
5282}
5283
5284/* Implement elf_backend_adjust_dynamic_symbol:
5285 Adjust a symbol defined by a dynamic object and referenced by a
5286 regular object. The current definition is in some section of the
5287 dynamic object, but we're not including those sections. We have to
5288 change the definition to something the rest of the link can
5289 understand. */
5290static bfd_boolean
5291nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info,
5292 struct elf_link_hash_entry *h)
5293{
5294 struct elf32_nios2_link_hash_table *htab;
5295 bfd *dynobj;
5474d94f 5296 asection *s, *srel;
36591ba1
SL		 5297 unsigned align2;
5298
5299 htab = elf32_nios2_hash_table (info);
4ef97a1b 5300 dynobj = htab->root.dynobj;
36591ba1
SL		 5301
5302 /* Make sure we know what is going on here. */
5303 BFD_ASSERT (dynobj != NULL
5304 && (h->needs_plt
60d67dc8 5305 || h->is_weakalias
36591ba1
SL		 5306 || (h->def_dynamic
5307 && h->ref_regular
5308 && !h->def_regular)));
5309
5310 /* If this is a function, put it in the procedure linkage table. We
5311 will fill in the contents of the procedure linkage table later,
5312 when we know the address of the .got section. */
5313 if (h->type == STT_FUNC || h->needs_plt)
5314 {
5315 if (h->plt.refcount <= 0
5316 || SYMBOL_CALLS_LOCAL (info, h)
5317 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5318 && h->root.type == bfd_link_hash_undefweak))
5319 {
5320 /* This case can occur if we saw a PLT reloc in an input
5321 file, but the symbol was never referred to by a dynamic
5322 object, or if all references were garbage collected. In
5323 such a case, we don't actually need to build a procedure
5324 linkage table, and we can just do a PCREL reloc instead. */
5325 h->plt.offset = (bfd_vma) -1;
5326 h->needs_plt = 0;
5327 }
5328
5329 return TRUE;
5330 }
5331
5332 /* Reinitialize the plt offset now that it is not used as a reference
5333 count any more. */
5334 h->plt.offset = (bfd_vma) -1;
5335
5336 /* If this is a weak symbol, and there is a real definition, the
5337 processor independent code will have arranged for us to see the
5338 real definition first, and we can just use the same value. */
60d67dc8 5339 if (h->is_weakalias)
36591ba1 5340 {
60d67dc8
AM		 5341 struct elf_link_hash_entry *def = weakdef (h);
5342 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5343 h->root.u.def.section = def->root.u.def.section;
5344 h->root.u.def.value = def->root.u.def.value;
36591ba1
SL		 5345 return TRUE;
5346 }
5347
5348 /* If there are no non-GOT references, we do not need a copy
5349 relocation. */
5350 if (!h->non_got_ref)
5351 return TRUE;
5352
5353 /* This is a reference to a symbol defined by a dynamic object which
5354 is not a function.
5355 If we are creating a shared library, we must presume that the
5356 only references to the symbol are via the global offset table.
5357 For such cases we need not do anything here; the relocations will
5358 be handled correctly by relocate_section. */
0e1862bb 5359 if (bfd_link_pic (info))
36591ba1
SL		 5360 return TRUE;
5361
5362 if (h->size == 0)
5363 {
4eca0228
AM		 5364 _bfd_error_handler (_("dynamic variable `%s' is zero size"),
5365 h->root.root.string);
36591ba1
SL		 5366 return TRUE;
5367 }
5368
5369 /* We must allocate the symbol in our .dynbss section, which will
5370 become part of the .bss section of the executable. There will be
5371 an entry for this symbol in the .dynsym section. The dynamic
5372 object will contain position independent code, so all references
5373 from the dynamic object to this symbol will go through the global
5374 offset table. The dynamic linker will use the .dynsym entry to
5375 determine the address it must put in the global offset table, so
5376 both the dynamic object and the regular object will refer to the
5377 same memory location for the variable. */
36591ba1
SL		 5378 /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to
5379 copy the initial value out of the dynamic object and into the
5380 runtime process image. We need to remember the offset into the
5381 .rela.bss section we are going to use. */
5474d94f 5382 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
36591ba1 5383 {
5474d94f
AM		 5384 s = htab->root.sdynrelro;
5385 srel = htab->root.sreldynrelro;
5386 }
5387 else
5388 {
5389 s = htab->root.sdynbss;
9d19e4fd 5390 srel = htab->root.srelbss;
5474d94f
AM		 5391 }
5392 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5393 {
36591ba1
SL		 5394 srel->size += sizeof (Elf32_External_Rela);
5395 h->needs_copy = 1;
5396 }
5397
5398 align2 = bfd_log2 (h->size);
5399 if (align2 > h->root.u.def.section->alignment_power)
5400 align2 = h->root.u.def.section->alignment_power;
5401
5402 /* Align dynbss. */
5403 s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2);
fd361982
AM		 5404 if (align2 > bfd_section_alignment (s)
5405 && !bfd_set_section_alignment (s, align2))
36591ba1
SL		 5406 return FALSE;
5407
5408 /* Define the symbol as being at this point in the section. */
5409 h->root.u.def.section = s;
5410 h->root.u.def.value = s->size;
5411
5412 /* Increment the section size to make room for the symbol. */
5413 s->size += h->size;
5414
5415 return TRUE;
5416}
5417
5418/* Worker function for nios2_elf32_size_dynamic_sections. */
5419static bfd_boolean
5420adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5421{
5422 struct bfd_link_info *info;
5423 struct elf32_nios2_link_hash_table *htab;
5424
5425 if (h->root.type == bfd_link_hash_indirect)
5426 return TRUE;
5427
5428 if (h->root.type == bfd_link_hash_warning)
5429 /* When warning symbols are created, they **replace** the "real"
5430 entry in the hash table, thus we never get to see the real
5431 symbol in a hash traversal. So look at it now. */
5432 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5433
5434 info = (struct bfd_link_info *) inf;
5435 htab = elf32_nios2_hash_table (info);
5436
5437 if (h->plt.offset != (bfd_vma)-1)
5438 h->plt.offset += htab->res_n_size;
5439 if (htab->root.splt == h->root.u.def.section)
5440 h->root.u.def.value += htab->res_n_size;
5441
5442 return TRUE;
5443}
5444
5445/* Another worker function for nios2_elf32_size_dynamic_sections.
5446 Allocate space in .plt, .got and associated reloc sections for
5447 dynamic relocs. */
5448static bfd_boolean
5449allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5450{
5451 struct bfd_link_info *info;
5452 struct elf32_nios2_link_hash_table *htab;
5453 struct elf32_nios2_link_hash_entry *eh;
3bf083ed 5454 struct elf_dyn_relocs *p;
36591ba1
SL		 5455 int use_plt;
5456
5457 if (h->root.type == bfd_link_hash_indirect)
5458 return TRUE;
5459
5460 if (h->root.type == bfd_link_hash_warning)
5461 /* When warning symbols are created, they **replace** the "real"
5462 entry in the hash table, thus we never get to see the real
5463 symbol in a hash traversal. So look at it now. */
5464 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5465
5466 info = (struct bfd_link_info *) inf;
5467 htab = elf32_nios2_hash_table (info);
5468
5469 if (htab->root.dynamic_sections_created
5470 && h->plt.refcount > 0)
5471 {
5472 /* Make sure this symbol is output as a dynamic symbol.
5473 Undefined weak syms won't yet be marked as dynamic. */
5474 if (h->dynindx == -1
5475 && !h->forced_local
5476 && !bfd_elf_link_record_dynamic_symbol (info, h))
5477 return FALSE;
5478
0e1862bb 5479 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
36591ba1
SL		 5480 {
5481 asection *s = htab->root.splt;
5482
5483 /* Allocate room for the header. */
5484 if (s->size == 0)
5485 {
0e1862bb 5486 if (bfd_link_pic (info))
36591ba1
SL		 5487 s->size = 24;
5488 else
5489 s->size = 28;
5490 }
5491
5492 h->plt.offset = s->size;
5493
5494 /* If this symbol is not defined in a regular file, and we are
5495 not generating a shared library, then set the symbol to this
5496 location in the .plt. This is required to make function
5497 pointers compare as equal between the normal executable and
5498 the shared library. */
0e1862bb 5499 if (! bfd_link_pic (info)
36591ba1
SL		 5500 && !h->def_regular)
5501 {
5502 h->root.u.def.section = s;
5503 h->root.u.def.value = h->plt.offset;
5504 }
5505
5506 /* Make room for this entry. */
5507 s->size += 12;
5508
5509 /* We also need to make an entry in the .rela.plt section. */
5510 htab->root.srelplt->size += sizeof (Elf32_External_Rela);
5511
5512 /* And the .got.plt section. */
5513 htab->root.sgotplt->size += 4;
5514 }
5515 else
5516 {
5517 h->plt.offset = (bfd_vma) -1;
5518 h->needs_plt = 0;
5519 }
5520 }
5521 else
5522 {
5523 h->plt.offset = (bfd_vma) -1;
5524 h->needs_plt = 0;
5525 }
5526
5527 eh = (struct elf32_nios2_link_hash_entry *) h;
1c2de463 5528 use_plt = (eh->got_types_used == CALL_USED
36591ba1
SL		 5529 && h->plt.offset != (bfd_vma) -1);
5530
5531 if (h->got.refcount > 0)
5532 {
5533 asection *s;
5534 bfd_boolean dyn;
5535 int tls_type = eh->tls_type;
5536 int indx;
5537
5538 /* Make sure this symbol is output as a dynamic symbol.
5539 Undefined weak syms won't yet be marked as dynamic. */
5540 if (h->dynindx == -1
5541 && !h->forced_local
5542 && !bfd_elf_link_record_dynamic_symbol (info, h))
5543 return FALSE;
5544
5545 s = htab->root.sgot;
5546 h->got.offset = s->size;
5547
5548 if (tls_type == GOT_UNKNOWN)
5549 abort ();
5550
5551 if (tls_type == GOT_NORMAL)
5552 /* Non-TLS symbols need one GOT slot. */
5553 s->size += 4;
5554 else
5555 {
5556 if (tls_type & GOT_TLS_GD)
5557 /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */
5558 s->size += 8;
5559 if (tls_type & GOT_TLS_IE)
5560 /* R_NIOS2_TLS_IE16 needs one GOT slot. */
5561 s->size += 4;
5562 }
5563
5564 dyn = htab->root.dynamic_sections_created;
5565
5566 indx = 0;
0e1862bb
L		 5567 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
5568 && (!bfd_link_pic (info)
36591ba1
SL		 5569 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5570 indx = h->dynindx;
5571
5572 if (tls_type != GOT_NORMAL
0e1862bb 5573 && (bfd_link_pic (info) || indx != 0)
36591ba1
SL		 5574 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5575 || h->root.type != bfd_link_hash_undefweak))
5576 {
5577 if (tls_type & GOT_TLS_IE)
5578 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5579
5580 if (tls_type & GOT_TLS_GD)
5581 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5582
5583 if ((tls_type & GOT_TLS_GD) && indx != 0)
5584 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5585 }
5586 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5587 || h->root.type != bfd_link_hash_undefweak)
5588 && !use_plt
0e1862bb 5589 && (bfd_link_pic (info)
36591ba1
SL		 5590 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5591 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5592 }
5593 else
5594 h->got.offset = (bfd_vma) -1;
5595
190eb1dd 5596 if (h->dyn_relocs == NULL)
36591ba1
SL		 5597 return TRUE;
5598
5599 /* In the shared -Bsymbolic case, discard space allocated for
5600 dynamic pc-relative relocs against symbols which turn out to be
5601 defined in regular objects. For the normal shared case, discard
5602 space for pc-relative relocs that have become local due to symbol
5603 visibility changes. */
5604
0e1862bb 5605 if (bfd_link_pic (info))
36591ba1
SL		 5606 {
5607 if (h->def_regular
a496fbc8 5608 && (h->forced_local || SYMBOLIC_BIND (info, h)))
36591ba1 5609 {
3bf083ed 5610 struct elf_dyn_relocs **pp;
36591ba1 5611
190eb1dd 5612 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
36591ba1
SL		 5613 {
5614 p->count -= p->pc_count;
5615 p->pc_count = 0;
5616 if (p->count == 0)
5617 *pp = p->next;
5618 else
5619 pp = &p->next;
5620 }
5621 }
5622
5623 /* Also discard relocs on undefined weak syms with non-default
5624 visibility. */
190eb1dd 5625 if (h->dyn_relocs != NULL
36591ba1
SL		 5626 && h->root.type == bfd_link_hash_undefweak)
5627 {
31a53da5
L		 5628 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5629 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
190eb1dd 5630 h->dyn_relocs = NULL;
36591ba1
SL		 5631
5632 /* Make sure undefined weak symbols are output as a dynamic
5633 symbol in PIEs. */
5634 else if (h->dynindx == -1
5635 && !h->forced_local
5636 && !bfd_elf_link_record_dynamic_symbol (info, h))
5637 return FALSE;
5638 }
5639 }
5640 else
5641 {
5642 /* For the non-shared case, discard space for relocs against
5643 symbols which turn out to need copy relocs or are not
5644 dynamic. */
5645
5646 if (!h->non_got_ref
5647 && ((h->def_dynamic && !h->def_regular)
5648 || (htab->root.dynamic_sections_created
5649 && (h->root.type == bfd_link_hash_undefweak
5650 || h->root.type == bfd_link_hash_undefined))))
5651 {
5652 /* Make sure this symbol is output as a dynamic symbol.
5653 Undefined weak syms won't yet be marked as dynamic. */
5654 if (h->dynindx == -1
5655 && !h->forced_local
5656 && !bfd_elf_link_record_dynamic_symbol (info, h))
5657 return FALSE;
5658
5659 /* If that succeeded, we know we'll be keeping all the
5660 relocs. */
5661 if (h->dynindx != -1)
5662 goto keep;
5663 }
5664
190eb1dd 5665 h->dyn_relocs = NULL;
36591ba1
SL		 5666
5667 keep: ;
5668 }
5669
5670 /* Finally, allocate space. */
190eb1dd 5671 for (p = h->dyn_relocs; p != NULL; p = p->next)
36591ba1
SL		 5672 {
5673 asection *sreloc = elf_section_data (p->sec)->sreloc;
5674 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5675 }
5676
5677 return TRUE;
5678}
5679
5680/* Implement elf_backend_size_dynamic_sections:
5681 Set the sizes of the dynamic sections. */
5682static bfd_boolean
5683nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5684 struct bfd_link_info *info)
5685{
5686 bfd *dynobj;
5687 asection *s;
36591ba1
SL		 5688 bfd_boolean relocs;
5689 bfd *ibfd;
5690 struct elf32_nios2_link_hash_table *htab;
5691
5692 htab = elf32_nios2_hash_table (info);
4ef97a1b 5693 dynobj = htab->root.dynobj;
36591ba1
SL		 5694 BFD_ASSERT (dynobj != NULL);
5695
5696 htab->res_n_size = 0;
4ef97a1b 5697 if (htab->root.dynamic_sections_created)
36591ba1
SL		 5698 {
5699 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 5700 if (bfd_link_executable (info) && !info->nointerp)
36591ba1
SL		 5701 {
5702 s = bfd_get_linker_section (dynobj, ".interp");
5703 BFD_ASSERT (s != NULL);
5704 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5705 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5706 }
5707 }
5708 else
5709 {
5710 /* We may have created entries in the .rela.got section.
5711 However, if we are not creating the dynamic sections, we will
5712 not actually use these entries. Reset the size of .rela.got,
5713 which will cause it to get stripped from the output file
5714 below. */
5715 s = htab->root.srelgot;
5716 if (s != NULL)
5717 s->size = 0;
5718 }
5719
5720 /* Set up .got offsets for local syms, and space for local dynamic
5721 relocs. */
c72f2fb2 5722 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
36591ba1
SL		 5723 {
5724 bfd_signed_vma *local_got;
5725 bfd_signed_vma *end_local_got;
5726 char *local_tls_type;
5727 bfd_size_type locsymcount;
5728 Elf_Internal_Shdr *symtab_hdr;
5729 asection *srel;
5730
5731 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5732 continue;
5733
5734 for (s = ibfd->sections; s != NULL; s = s->next)
5735 {
3bf083ed 5736 struct elf_dyn_relocs *p;
36591ba1
SL		 5737
5738 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
5739 {
5740 if (!bfd_is_abs_section (p->sec)
5741 && bfd_is_abs_section (p->sec->output_section))
5742 {
5743 /* Input section has been discarded, either because
5744 it is a copy of a linkonce section or due to
5745 linker script /DISCARD/, so we'll be discarding
5746 the relocs too. */
5747 }
5748 else if (p->count != 0)
5749 {
5750 srel = elf_section_data (p->sec)->sreloc;
5751 srel->size += p->count * sizeof (Elf32_External_Rela);
36591ba1
SL		 5752 }
5753 }
5754 }
5755
5756 local_got = elf_local_got_refcounts (ibfd);
5757 if (!local_got)
5758 continue;
5759
5760 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5761 locsymcount = symtab_hdr->sh_info;
5762 end_local_got = local_got + locsymcount;
5763 local_tls_type = elf32_nios2_local_got_tls_type (ibfd);
5764 s = htab->root.sgot;
5765 srel = htab->root.srelgot;
5766 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5767 {
5768 if (*local_got > 0)
5769 {
5770 *local_got = s->size;
5771 if (*local_tls_type & GOT_TLS_GD)
5772 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5773 s->size += 8;
5774 if (*local_tls_type & GOT_TLS_IE)
5775 s->size += 4;
5776 if (*local_tls_type == GOT_NORMAL)
5777 s->size += 4;
5778
0e1862bb 5779 if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD)
36591ba1
SL		 5780 srel->size += sizeof (Elf32_External_Rela);
5781 }
5782 else
5783 *local_got = (bfd_vma) -1;
5784 }
5785 }
5786
5787 if (htab->tls_ldm_got.refcount > 0)
5788 {
5789 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5790 for R_NIOS2_TLS_LDM16 relocations. */
5791 htab->tls_ldm_got.offset = htab->root.sgot->size;
5792 htab->root.sgot->size += 8;
0e1862bb 5793 if (bfd_link_pic (info))
36591ba1
SL		 5794 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5795 }
5796 else
5797 htab->tls_ldm_got.offset = -1;
5798
5799 /* Allocate global sym .plt and .got entries, and space for global
5800 sym dynamic relocs. */
5801 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5802
4ef97a1b 5803 if (htab->root.dynamic_sections_created)
82e91538
SL		 5804 {
5805 /* If the .got section is more than 0x8000 bytes, we add
5806 0x8000 to the value of _gp_got, so that 16-bit relocations
5807 have a greater chance of working. */
5808 if (htab->root.sgot->size >= 0x8000
4ef97a1b
AM		 5809 && htab->h_gp_got->root.u.def.value == 0)
5810 htab->h_gp_got->root.u.def.value = 0x8000;
82e91538
SL		 5811 }
5812
36591ba1
SL		 5813 /* The check_relocs and adjust_dynamic_symbol entry points have
5814 determined the sizes of the various dynamic sections. Allocate
5815 memory for them. */
36591ba1
SL		 5816 relocs = FALSE;
5817 for (s = dynobj->sections; s != NULL; s = s->next)
5818 {
5819 const char *name;
5820
5821 if ((s->flags & SEC_LINKER_CREATED) == 0)
5822 continue;
5823
5824 /* It's OK to base decisions on the section name, because none
5825 of the dynobj section names depend upon the input files. */
fd361982 5826 name = bfd_section_name (s);
36591ba1 5827
4ef97a1b 5828 if (CONST_STRNEQ (name, ".rela"))
36591ba1
SL		 5829 {
5830 if (s->size != 0)
5831 {
4ef97a1b
AM		 5832 if (s != htab->root.srelplt)
5833 relocs = TRUE;
36591ba1
SL		 5834
5835 /* We use the reloc_count field as a counter if we need
5836 to copy relocs into the output file. */
5837 s->reloc_count = 0;
5838 }
5839 }
4ef97a1b 5840 else if (s == htab->root.splt)
5474d94f 5841 {
4ef97a1b
AM		 5842 /* Correct for the number of res_N branches. */
5843 if (s->size != 0 && !bfd_link_pic (info))
5844 {
5845 htab->res_n_size = (s->size - 28) / 3;
5846 s->size += htab->res_n_size;
5847 }
5474d94f 5848 }
4ef97a1b
AM		 5849 else if (s != htab->sbss
5850 && s != htab->root.sgot
5851 && s != htab->root.sgotplt
5852 && s != htab->root.sdynbss
5474d94f 5853 && s != htab->root.sdynrelro)
36591ba1
SL		 5854 /* It's not one of our sections, so don't allocate space. */
5855 continue;
5856
5857 if (s->size == 0)
5858 {
36591ba1
SL		 5859 s->flags |= SEC_EXCLUDE;
5860 continue;
5861 }
5862
5863 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5864 continue;
5865
5866 /* Allocate memory for the section contents. */
36591ba1
SL		 5867 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5868 if (s->contents == NULL)
5869 return FALSE;
5870 }
5871
5872 /* Adjust dynamic symbols that point to the plt to account for the
5873 now-known number of resN slots. */
5874 if (htab->res_n_size)
5875 elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info);
5876
3084d7a2 5877 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
36591ba1
SL		 5878}
5879
68faa637
AM		 5880/* Free the derived linker hash table. */
5881static void
d495ab0d 5882nios2_elf32_link_hash_table_free (bfd *obfd)
68faa637
AM		 5883{
5884 struct elf32_nios2_link_hash_table *htab
d495ab0d 5885 = (struct elf32_nios2_link_hash_table *) obfd->link.hash;
68faa637
AM		 5886
5887 bfd_hash_table_free (&htab->bstab);
d495ab0d 5888 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 5889}
5890
36591ba1
SL		 5891/* Implement bfd_elf32_bfd_link_hash_table_create. */
5892static struct bfd_link_hash_table *
5893nios2_elf32_link_hash_table_create (bfd *abfd)
5894{
5895 struct elf32_nios2_link_hash_table *ret;
986f0783 5896 size_t amt = sizeof (struct elf32_nios2_link_hash_table);
36591ba1 5897
7bf52ea2 5898 ret = bfd_zmalloc (amt);
36591ba1
SL		 5899 if (ret == NULL)
5900 return NULL;
5901
5902 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5903 link_hash_newfunc,
5904 sizeof (struct
5905 elf32_nios2_link_hash_entry),
5906 NIOS2_ELF_DATA))
5907 {
5908 free (ret);
5909 return NULL;
5910 }
5911
78058a5e
SL		 5912 /* Init the stub hash table too. */
5913 if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc,
5914 sizeof (struct elf32_nios2_stub_hash_entry)))
d495ab0d
AM		 5915 {
5916 _bfd_elf_link_hash_table_free (abfd);
5917 return NULL;
5918 }
5919 ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free;
78058a5e 5920
36591ba1
SL		 5921 return &ret->root.root;
5922}
5923
5924/* Implement elf_backend_reloc_type_class. */
5925static enum elf_reloc_type_class
7e612e98
AM		 5926nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5927 const asection *rel_sec ATTRIBUTE_UNUSED,
5928 const Elf_Internal_Rela *rela)
36591ba1
SL		 5929{
5930 switch ((int) ELF32_R_TYPE (rela->r_info))
5931 {
5932 case R_NIOS2_RELATIVE:
5933 return reloc_class_relative;
5934 case R_NIOS2_JUMP_SLOT:
5935 return reloc_class_plt;
5936 case R_NIOS2_COPY:
5937 return reloc_class_copy;
5938 default:
5939 return reloc_class_normal;
5940 }
5941}
5942
5943/* Return 1 if target is one of ours. */
5944static bfd_boolean
5945is_nios2_elf_target (const struct bfd_target *targ)
5946{
6d00b590
AM		 5947 return (targ == &nios2_elf32_le_vec
5948 || targ == &nios2_elf32_be_vec);
36591ba1
SL		 5949}
5950
5951/* Implement elf_backend_add_symbol_hook.
5952 This hook is called by the linker when adding symbols from an object
5953 file. We use it to put .comm items in .sbss, and not .bss. */
5954static bfd_boolean
5955nios2_elf_add_symbol_hook (bfd *abfd,
5956 struct bfd_link_info *info,
5957 Elf_Internal_Sym *sym,
5958 const char **namep ATTRIBUTE_UNUSED,
5959 flagword *flagsp ATTRIBUTE_UNUSED,
5960 asection **secp,
5961 bfd_vma *valp)
5962{
36591ba1 5963 if (sym->st_shndx == SHN_COMMON
0e1862bb 5964 && !bfd_link_relocatable (info)
36591ba1
SL		 5965 && sym->st_size <= elf_gp_size (abfd)
5966 && is_nios2_elf_target (info->output_bfd->xvec))
5967 {
5968 /* Common symbols less than or equal to -G nn bytes are automatically
5969 put into .sbss. */
5970 struct elf32_nios2_link_hash_table *htab;
5971
5972 htab = elf32_nios2_hash_table (info);
5973 if (htab->sbss == NULL)
5974 {
10885e24 5975 flagword flags = SEC_IS_COMMON | SEC_SMALL_DATA | SEC_LINKER_CREATED;
36591ba1 5976
4ef97a1b
AM		 5977 if (htab->root.dynobj == NULL)
5978 htab->root.dynobj = abfd;
36591ba1 5979
4ef97a1b
AM		 5980 htab->sbss = bfd_make_section_anyway_with_flags (htab->root.dynobj,
5981 ".sbss", flags);
36591ba1
SL		 5982 if (htab->sbss == NULL)
5983 return FALSE;
5984 }
5985
5986 *secp = htab->sbss;
5987 *valp = sym->st_size;
5988 }
5989
5990 return TRUE;
5991}
5992
5993/* Implement elf_backend_can_make_relative_eh_frame:
5994 Decide whether to attempt to turn absptr or lsda encodings in
5995 shared libraries into pcrel within the given input section. */
5996static bfd_boolean
5997nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED,
5998 struct bfd_link_info *info
5999 ATTRIBUTE_UNUSED,
6000 asection *eh_frame_section
6001 ATTRIBUTE_UNUSED)
6002{
6003 /* We can't use PC-relative encodings in the .eh_frame section. */
6004 return FALSE;
6005}
6006
6007/* Implement elf_backend_special_sections. */
6008const struct bfd_elf_special_section elf32_nios2_special_sections[] =
6009{
6010 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS,
6011 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6012 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS,
6013 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6014 { NULL, 0, 0, 0, 0 }
6015};
6016
6017#define ELF_ARCH bfd_arch_nios2
6018#define ELF_TARGET_ID NIOS2_ELF_DATA
6019#define ELF_MACHINE_CODE EM_ALTERA_NIOS2
6020
6021/* The Nios II MMU uses a 4K page size. */
6022
6023#define ELF_MAXPAGESIZE 0x1000
6024
6025#define bfd_elf32_bfd_link_hash_table_create \
6026 nios2_elf32_link_hash_table_create
6027
965b1d80
SL		 6028#define bfd_elf32_bfd_merge_private_bfd_data \
6029 nios2_elf32_merge_private_bfd_data
6030
36591ba1
SL		 6031/* Relocation table lookup macros. */
6032
6033#define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup
6034#define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup
6035
6036/* JUMP_TABLE_LINK macros. */
6037
6038/* elf_info_to_howto (using RELA relocations). */
6039
6040#define elf_info_to_howto nios2_elf32_info_to_howto
6041
6042/* elf backend functions. */
6043
6044#define elf_backend_can_gc_sections 1
6045#define elf_backend_can_refcount 1
6046#define elf_backend_plt_readonly 1
6047#define elf_backend_want_got_plt 1
5474d94f 6048#define elf_backend_want_dynrelro 1
36591ba1 6049#define elf_backend_rela_normal 1
64f52338 6050#define elf_backend_dtrel_excludes_plt 1
36591ba1
SL		 6051
6052#define elf_backend_relocate_section nios2_elf32_relocate_section
6053#define elf_backend_section_flags nios2_elf32_section_flags
6054#define elf_backend_fake_sections nios2_elf32_fake_sections
6055#define elf_backend_check_relocs nios2_elf32_check_relocs
6056
6057#define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook
36591ba1
SL		 6058#define elf_backend_create_dynamic_sections \
6059 nios2_elf32_create_dynamic_sections
6060#define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol
6061#define elf_backend_finish_dynamic_sections \
6062 nios2_elf32_finish_dynamic_sections
6063#define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol
6064#define elf_backend_reloc_type_class nios2_elf32_reloc_type_class
6065#define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections
6066#define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook
6067#define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol
965b1d80 6068#define elf_backend_object_p nios2_elf32_object_p
36591ba1
SL		 6069
6070#define elf_backend_grok_prstatus nios2_grok_prstatus
6071#define elf_backend_grok_psinfo nios2_grok_psinfo
6072
6073#undef elf_backend_can_make_relative_eh_frame
6074#define elf_backend_can_make_relative_eh_frame \
6075 nios2_elf32_can_make_relative_eh_frame
6076
6077#define elf_backend_special_sections elf32_nios2_special_sections
6078
6d00b590 6079#define TARGET_LITTLE_SYM nios2_elf32_le_vec
36591ba1 6080#define TARGET_LITTLE_NAME "elf32-littlenios2"
6d00b590 6081#define TARGET_BIG_SYM nios2_elf32_be_vec
36591ba1
SL		 6082#define TARGET_BIG_NAME "elf32-bignios2"
6083
6084#define elf_backend_got_header_size 12
03d5b773 6085#define elf_backend_default_execstack 0
36591ba1
SL		 6086
6087#include "elf32-target.h"
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