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36591ba1 | 1 | /* 32-bit ELF support for Nios II. |
b3adc24a | 2 | Copyright (C) 2012-2020 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. */ | |
46 | static bfd_reloc_status_type nios2_elf32_ignore_reloc | |
47 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
48 | static bfd_reloc_status_type nios2_elf32_hi16_relocate | |
49 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
50 | static bfd_reloc_status_type nios2_elf32_lo16_relocate | |
51 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
52 | static bfd_reloc_status_type nios2_elf32_hiadj16_relocate | |
53 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
54 | static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate | |
55 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
56 | static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate | |
57 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
58 | static bfd_reloc_status_type nios2_elf32_pcrel16_relocate | |
59 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
60 | static bfd_reloc_status_type nios2_elf32_call26_relocate | |
61 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
62 | static bfd_reloc_status_type nios2_elf32_gprel_relocate | |
63 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
64 | static bfd_reloc_status_type nios2_elf32_ujmp_relocate | |
65 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
66 | static bfd_reloc_status_type nios2_elf32_cjmp_relocate | |
67 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
68 | static bfd_reloc_status_type nios2_elf32_callr_relocate | |
69 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
70 | ||
71 | /* Target vector. */ | |
6d00b590 AM |
72 | extern const bfd_target nios2_elf32_le_vec; |
73 | extern 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. */ | |
81 | static 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 |
734 | static 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 |
1568 | static 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. */ |
1575 | static reloc_howto_type * | |
8c163c5a | 1576 | lookup_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. */ | |
1617 | struct elf_reloc_map | |
1618 | { | |
1619 | bfd_reloc_code_real_type bfd_val; | |
1620 | enum elf_nios2_reloc_type elf_val; | |
1621 | }; | |
1622 | ||
f3185997 NC |
1623 | static 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 | ||
1686 | enum elf32_nios2_stub_type | |
1687 | { | |
1688 | nios2_stub_call26_before, | |
1689 | nios2_stub_call26_after, | |
1690 | nios2_stub_none | |
1691 | }; | |
1692 | ||
1693 | struct 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 | ||
1732 | struct 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 | 1740 | /* Track dynamic relocs copied for this symbol. */ |
3bf083ed | 1741 | struct elf_dyn_relocs *dyn_relocs; |
36591ba1 SL |
1742 | |
1743 | #define GOT_UNKNOWN 0 | |
1744 | #define GOT_NORMAL 1 | |
1745 | #define GOT_TLS_GD 2 | |
1746 | #define GOT_TLS_IE 4 | |
1747 | unsigned char tls_type; | |
1748 | ||
1749 | /* We need to detect and take special action for symbols which are only | |
1750 | referenced with %call() and not with %got(). Such symbols do not need | |
1751 | a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy | |
1752 | linking will not work if the dynamic GOT reloc exists. | |
1753 | To check for this condition efficiently, we compare got_types_used against | |
1c2de463 SL |
1754 | CALL_USED, meaning |
1755 | (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED. | |
1756 | */ | |
1757 | #define GOT_USED 1 | |
1758 | #define CALL_USED 2 | |
36591ba1 SL |
1759 | unsigned char got_types_used; |
1760 | }; | |
1761 | ||
1762 | #define elf32_nios2_hash_entry(ent) \ | |
1763 | ((struct elf32_nios2_link_hash_entry *) (ent)) | |
1764 | ||
1765 | /* Get the Nios II elf linker hash table from a link_info structure. */ | |
1766 | #define elf32_nios2_hash_table(info) \ | |
1767 | ((struct elf32_nios2_link_hash_table *) ((info)->hash)) | |
1768 | ||
1769 | /* Nios II ELF linker hash table. */ | |
1770 | struct elf32_nios2_link_hash_table | |
1771 | { | |
1772 | /* The main hash table. */ | |
1773 | struct elf_link_hash_table root; | |
1774 | ||
78058a5e SL |
1775 | /* The stub hash table. */ |
1776 | struct bfd_hash_table bstab; | |
1777 | ||
1778 | /* Linker stub bfd. */ | |
1779 | bfd *stub_bfd; | |
1780 | ||
1781 | /* Linker call-backs. */ | |
1782 | asection * (*add_stub_section) (const char *, asection *, bfd_boolean); | |
1783 | void (*layout_sections_again) (void); | |
1784 | ||
1785 | /* Array to keep track of which stub sections have been created, and | |
1786 | information on stub grouping. */ | |
1787 | struct map_stub | |
1788 | { | |
1789 | /* These are the section to which stubs in the group will be | |
1790 | attached. */ | |
1791 | asection *first_sec, *last_sec; | |
1792 | /* The stub sections. There might be stubs inserted either before | |
1793 | or after the real section.*/ | |
1794 | asection *first_stub_sec, *last_stub_sec; | |
1795 | } *stub_group; | |
1796 | ||
1797 | /* Assorted information used by nios2_elf32_size_stubs. */ | |
1798 | unsigned int bfd_count; | |
7292b3ac | 1799 | unsigned int top_index; |
78058a5e SL |
1800 | asection **input_list; |
1801 | Elf_Internal_Sym **all_local_syms; | |
1802 | ||
36591ba1 | 1803 | /* Short-cuts to get to dynamic linker sections. */ |
36591ba1 SL |
1804 | asection *sbss; |
1805 | ||
82e91538 SL |
1806 | /* GOT pointer symbol _gp_got. */ |
1807 | struct elf_link_hash_entry *h_gp_got; | |
1808 | ||
36591ba1 SL |
1809 | union { |
1810 | bfd_signed_vma refcount; | |
1811 | bfd_vma offset; | |
1812 | } tls_ldm_got; | |
1813 | ||
1814 | /* Small local sym cache. */ | |
1815 | struct sym_cache sym_cache; | |
1816 | ||
1817 | bfd_vma res_n_size; | |
1818 | }; | |
1819 | ||
1820 | struct nios2_elf32_obj_tdata | |
1821 | { | |
1822 | struct elf_obj_tdata root; | |
1823 | ||
1824 | /* tls_type for each local got entry. */ | |
1825 | char *local_got_tls_type; | |
1826 | ||
1827 | /* TRUE if TLS GD relocs have been seen for this object. */ | |
1828 | bfd_boolean has_tlsgd; | |
1829 | }; | |
1830 | ||
1831 | #define elf32_nios2_tdata(abfd) \ | |
1832 | ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any) | |
1833 | ||
1834 | #define elf32_nios2_local_got_tls_type(abfd) \ | |
1835 | (elf32_nios2_tdata (abfd)->local_got_tls_type) | |
1836 | ||
1837 | /* The name of the dynamic interpreter. This is put in the .interp | |
1838 | section. */ | |
1839 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
1840 | ||
1841 | /* PLT implementation for position-dependent code. */ | |
1842 | static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */ | |
1843 | 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */ | |
1844 | 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */ | |
1845 | 0x7800683a /* jmp r15 */ | |
1846 | }; | |
1847 | ||
1848 | static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */ | |
1849 | 0x03800034, /* movhi r14, %hiadj(res_0) */ | |
1850 | 0x73800004, /* addi r14, r14, %lo(res_0) */ | |
1851 | 0x7b9fc83a, /* sub r15, r15, r14 */ | |
1852 | 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ | |
1853 | 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ | |
1854 | 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ | |
1855 | 0x6800683a /* jmp r13 */ | |
1856 | }; | |
1857 | ||
1858 | /* PLT implementation for position-independent code. */ | |
1859 | static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */ | |
1860 | 0x03c00034, /* movhi r15, %hiadj(index * 4) */ | |
1861 | 0x7bc00004, /* addi r15, r15, %lo(index * 4) */ | |
1862 | 0x00000006 /* br .PLTresolve */ | |
1863 | }; | |
1864 | ||
1865 | static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */ | |
1866 | 0x001ce03a, /* nextpc r14 */ | |
1867 | 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ | |
1868 | 0x6b9b883a, /* add r13, r13, r14 */ | |
1869 | 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ | |
1870 | 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ | |
1871 | 0x6800683a /* jmp r13 */ | |
1872 | }; | |
1873 | ||
78058a5e SL |
1874 | /* CALL26 stub. */ |
1875 | static const bfd_vma nios2_call26_stub_entry[] = { | |
1876 | 0x00400034, /* orhi at, r0, %hiadj(dest) */ | |
1877 | 0x08400004, /* addi at, at, %lo(dest) */ | |
1878 | 0x0800683a /* jmp at */ | |
1879 | }; | |
1880 | ||
1881 | /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */ | |
1882 | static void | |
1883 | nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value) | |
1884 | { | |
1885 | bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset); | |
1886 | ||
83da6e74 | 1887 | BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff); |
78058a5e SL |
1888 | |
1889 | bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6), | |
1890 | sec->contents + offset); | |
1891 | } | |
1892 | ||
1893 | /* Install COUNT 32-bit values DATA starting at offset OFFSET into | |
1894 | section SEC. */ | |
1895 | static void | |
1896 | nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset, | |
1897 | int count) | |
1898 | { | |
1899 | while (count--) | |
1900 | { | |
1901 | bfd_put_32 (sec->owner, *data, sec->contents + offset); | |
1902 | offset += 4; | |
1903 | ++data; | |
1904 | } | |
1905 | } | |
1906 | ||
1907 | /* The usual way of loading a 32-bit constant into a Nios II register is to | |
1908 | load the high 16 bits in one instruction and then add the low 16 bits with | |
1909 | a signed add. This means that the high halfword needs to be adjusted to | |
1910 | compensate for the sign bit of the low halfword. This function returns the | |
1911 | adjusted high halfword for a given 32-bit constant. */ | |
1912 | static | |
1913 | bfd_vma hiadj (bfd_vma symbol_value) | |
1914 | { | |
1915 | return ((symbol_value + 0x8000) >> 16) & 0xffff; | |
1916 | } | |
1917 | ||
36591ba1 SL |
1918 | /* Implement elf_backend_grok_prstatus: |
1919 | Support for core dump NOTE sections. */ | |
1920 | static bfd_boolean | |
1921 | nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
1922 | { | |
1923 | int offset; | |
1924 | size_t size; | |
1925 | ||
1926 | switch (note->descsz) | |
1927 | { | |
1928 | default: | |
1929 | return FALSE; | |
1930 | ||
1931 | case 212: /* Linux/Nios II */ | |
1932 | /* pr_cursig */ | |
228e534f | 1933 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
36591ba1 SL |
1934 | |
1935 | /* pr_pid */ | |
228e534f | 1936 | elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); |
36591ba1 SL |
1937 | |
1938 | /* pr_reg */ | |
1939 | offset = 72; | |
1940 | size = 136; | |
1941 | ||
1942 | break; | |
1943 | } | |
1944 | ||
1945 | /* Make a ".reg/999" section. */ | |
1946 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
1947 | size, note->descpos + offset); | |
1948 | } | |
1949 | ||
1950 | /* Implement elf_backend_grok_psinfo. */ | |
1951 | static bfd_boolean | |
1952 | nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) | |
1953 | { | |
1954 | switch (note->descsz) | |
1955 | { | |
1956 | default: | |
1957 | return FALSE; | |
1958 | ||
1959 | case 124: /* Linux/Nios II elf_prpsinfo */ | |
228e534f | 1960 | elf_tdata (abfd)->core->program |
36591ba1 | 1961 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 1962 | elf_tdata (abfd)->core->command |
36591ba1 SL |
1963 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
1964 | } | |
1965 | ||
1966 | /* Note that for some reason, a spurious space is tacked | |
1967 | onto the end of the args in some (at least one anyway) | |
1968 | implementations, so strip it off if it exists. */ | |
1969 | ||
1970 | { | |
228e534f | 1971 | char *command = elf_tdata (abfd)->core->command; |
36591ba1 SL |
1972 | int n = strlen (command); |
1973 | ||
1974 | if (0 < n && command[n - 1] == ' ') | |
1975 | command[n - 1] = '\0'; | |
1976 | } | |
1977 | ||
1978 | return TRUE; | |
1979 | } | |
1980 | ||
78058a5e SL |
1981 | /* Assorted hash table functions. */ |
1982 | ||
1983 | /* Initialize an entry in the stub hash table. */ | |
1984 | static struct bfd_hash_entry * | |
1985 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
1986 | struct bfd_hash_table *table, | |
1987 | const char *string) | |
1988 | { | |
1989 | /* Allocate the structure if it has not already been allocated by a | |
1990 | subclass. */ | |
1991 | if (entry == NULL) | |
1992 | { | |
1993 | entry = bfd_hash_allocate (table, | |
1994 | sizeof (struct elf32_nios2_stub_hash_entry)); | |
1995 | if (entry == NULL) | |
1996 | return entry; | |
1997 | } | |
1998 | ||
1999 | /* Call the allocation method of the superclass. */ | |
2000 | entry = bfd_hash_newfunc (entry, table, string); | |
2001 | if (entry != NULL) | |
2002 | { | |
2003 | struct elf32_nios2_stub_hash_entry *hsh; | |
2004 | ||
2005 | /* Initialize the local fields. */ | |
2006 | hsh = (struct elf32_nios2_stub_hash_entry *) entry; | |
2007 | hsh->stub_sec = NULL; | |
2008 | hsh->stub_offset = 0; | |
2009 | hsh->target_value = 0; | |
2010 | hsh->target_section = NULL; | |
2011 | hsh->stub_type = nios2_stub_none; | |
2012 | hsh->hh = NULL; | |
2013 | hsh->id_sec = NULL; | |
2014 | } | |
2015 | ||
2016 | return entry; | |
2017 | } | |
2018 | ||
36591ba1 SL |
2019 | /* Create an entry in a Nios II ELF linker hash table. */ |
2020 | static struct bfd_hash_entry * | |
2021 | link_hash_newfunc (struct bfd_hash_entry *entry, | |
2022 | struct bfd_hash_table *table, const char *string) | |
2023 | { | |
2024 | /* Allocate the structure if it has not already been allocated by a | |
2025 | subclass. */ | |
2026 | if (entry == NULL) | |
2027 | { | |
2028 | entry = bfd_hash_allocate (table, | |
2029 | sizeof (struct elf32_nios2_link_hash_entry)); | |
2030 | if (entry == NULL) | |
2031 | return entry; | |
2032 | } | |
2033 | ||
2034 | /* Call the allocation method of the superclass. */ | |
2035 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
2036 | if (entry) | |
2037 | { | |
2038 | struct elf32_nios2_link_hash_entry *eh; | |
2039 | ||
2040 | eh = (struct elf32_nios2_link_hash_entry *) entry; | |
78058a5e | 2041 | eh->hsh_cache = NULL; |
36591ba1 SL |
2042 | eh->dyn_relocs = NULL; |
2043 | eh->tls_type = GOT_UNKNOWN; | |
2044 | eh->got_types_used = 0; | |
2045 | } | |
2046 | ||
2047 | return entry; | |
2048 | } | |
2049 | ||
78058a5e SL |
2050 | /* Section name for stubs is the associated section name plus this |
2051 | string. */ | |
2052 | #define STUB_SUFFIX ".stub" | |
2053 | ||
2054 | /* Build a name for an entry in the stub hash table. */ | |
2055 | static char * | |
2056 | nios2_stub_name (const asection *input_section, | |
2057 | const asection *sym_sec, | |
2058 | const struct elf32_nios2_link_hash_entry *hh, | |
2059 | const Elf_Internal_Rela *rel, | |
2060 | enum elf32_nios2_stub_type stub_type) | |
2061 | { | |
2062 | char *stub_name; | |
2063 | bfd_size_type len; | |
2064 | char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a'; | |
2065 | ||
2066 | if (hh) | |
2067 | { | |
2068 | len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1; | |
2069 | stub_name = bfd_malloc (len); | |
2070 | if (stub_name != NULL) | |
2071 | { | |
2072 | sprintf (stub_name, "%08x_%c_%s+%x", | |
2073 | input_section->id & 0xffffffff, | |
2074 | stubpos, | |
2075 | hh->root.root.root.string, | |
2076 | (int) rel->r_addend & 0xffffffff); | |
2077 | } | |
2078 | } | |
2079 | else | |
2080 | { | |
2081 | len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1; | |
2082 | stub_name = bfd_malloc (len); | |
2083 | if (stub_name != NULL) | |
2084 | { | |
2085 | sprintf (stub_name, "%08x_%c_%x:%x+%x", | |
2086 | input_section->id & 0xffffffff, | |
2087 | stubpos, | |
2088 | sym_sec->id & 0xffffffff, | |
2089 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, | |
2090 | (int) rel->r_addend & 0xffffffff); | |
2091 | } | |
2092 | } | |
2093 | return stub_name; | |
2094 | } | |
2095 | ||
2096 | /* Look up an entry in the stub hash. Stub entries are cached because | |
2097 | creating the stub name takes a bit of time. */ | |
2098 | static struct elf32_nios2_stub_hash_entry * | |
2099 | nios2_get_stub_entry (const asection *input_section, | |
2100 | const asection *sym_sec, | |
2101 | struct elf32_nios2_link_hash_entry *hh, | |
2102 | const Elf_Internal_Rela *rel, | |
2103 | struct elf32_nios2_link_hash_table *htab, | |
2104 | enum elf32_nios2_stub_type stub_type) | |
2105 | { | |
2106 | struct elf32_nios2_stub_hash_entry *hsh; | |
2107 | const asection *id_sec; | |
2108 | ||
2109 | /* If this input section is part of a group of sections sharing one | |
2110 | stub section, then use the id of the first/last section in the group, | |
2111 | depending on the stub section placement relative to the group. | |
2112 | Stub names need to include a section id, as there may well be | |
2113 | more than one stub used to reach say, printf, and we need to | |
2114 | distinguish between them. */ | |
2115 | if (stub_type == nios2_stub_call26_before) | |
2116 | id_sec = htab->stub_group[input_section->id].first_sec; | |
2117 | else | |
2118 | id_sec = htab->stub_group[input_section->id].last_sec; | |
2119 | ||
2120 | if (hh != NULL && hh->hsh_cache != NULL | |
2121 | && hh->hsh_cache->hh == hh | |
2122 | && hh->hsh_cache->id_sec == id_sec | |
2123 | && hh->hsh_cache->stub_type == stub_type) | |
2124 | { | |
2125 | hsh = hh->hsh_cache; | |
2126 | } | |
2127 | else | |
2128 | { | |
2129 | char *stub_name; | |
2130 | ||
2131 | stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type); | |
2132 | if (stub_name == NULL) | |
2133 | return NULL; | |
2134 | ||
2135 | hsh = nios2_stub_hash_lookup (&htab->bstab, | |
2136 | stub_name, FALSE, FALSE); | |
2137 | ||
2138 | if (hh != NULL) | |
2139 | hh->hsh_cache = hsh; | |
2140 | ||
2141 | free (stub_name); | |
2142 | } | |
2143 | ||
2144 | return hsh; | |
2145 | } | |
2146 | ||
2147 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2148 | stub entry are initialised. */ | |
2149 | static struct elf32_nios2_stub_hash_entry * | |
2150 | nios2_add_stub (const char *stub_name, | |
2151 | asection *section, | |
2152 | struct elf32_nios2_link_hash_table *htab, | |
2153 | enum elf32_nios2_stub_type stub_type) | |
2154 | { | |
2155 | asection *link_sec; | |
2156 | asection *stub_sec; | |
2157 | asection **secptr, **linkptr; | |
2158 | struct elf32_nios2_stub_hash_entry *hsh; | |
2159 | bfd_boolean afterp; | |
2160 | ||
2161 | if (stub_type == nios2_stub_call26_before) | |
2162 | { | |
2163 | link_sec = htab->stub_group[section->id].first_sec; | |
2164 | secptr = &(htab->stub_group[section->id].first_stub_sec); | |
2165 | linkptr = &(htab->stub_group[link_sec->id].first_stub_sec); | |
2166 | afterp = FALSE; | |
2167 | } | |
2168 | else | |
2169 | { | |
2170 | link_sec = htab->stub_group[section->id].last_sec; | |
2171 | secptr = &(htab->stub_group[section->id].last_stub_sec); | |
2172 | linkptr = &(htab->stub_group[link_sec->id].last_stub_sec); | |
2173 | afterp = TRUE; | |
2174 | } | |
2175 | stub_sec = *secptr; | |
2176 | if (stub_sec == NULL) | |
2177 | { | |
2178 | stub_sec = *linkptr; | |
2179 | if (stub_sec == NULL) | |
2180 | { | |
2181 | size_t namelen; | |
2182 | bfd_size_type len; | |
2183 | char *s_name; | |
2184 | ||
2185 | namelen = strlen (link_sec->name); | |
2186 | len = namelen + sizeof (STUB_SUFFIX); | |
2187 | s_name = bfd_alloc (htab->stub_bfd, len); | |
2188 | if (s_name == NULL) | |
2189 | return NULL; | |
2190 | ||
2191 | memcpy (s_name, link_sec->name, namelen); | |
2192 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
2193 | ||
2194 | stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp); | |
2195 | if (stub_sec == NULL) | |
2196 | return NULL; | |
2197 | *linkptr = stub_sec; | |
2198 | } | |
2199 | *secptr = stub_sec; | |
2200 | } | |
2201 | ||
2202 | /* Enter this entry into the linker stub hash table. */ | |
2203 | hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name, | |
2204 | TRUE, FALSE); | |
2205 | if (hsh == NULL) | |
2206 | { | |
695344c0 | 2207 | /* xgettext:c-format */ |
871b3ab2 | 2208 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
4eca0228 AM |
2209 | section->owner, |
2210 | stub_name); | |
78058a5e SL |
2211 | return NULL; |
2212 | } | |
2213 | ||
2214 | hsh->stub_sec = stub_sec; | |
2215 | hsh->stub_offset = 0; | |
2216 | hsh->id_sec = link_sec; | |
2217 | return hsh; | |
2218 | } | |
2219 | ||
2220 | /* Set up various things so that we can make a list of input sections | |
2221 | for each output section included in the link. Returns -1 on error, | |
2222 | 0 when no stubs will be needed, and 1 on success. */ | |
2223 | int | |
2224 | nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) | |
2225 | { | |
2226 | bfd *input_bfd; | |
2227 | unsigned int bfd_count; | |
7292b3ac | 2228 | unsigned int top_id, top_index; |
78058a5e SL |
2229 | asection *section; |
2230 | asection **input_list, **list; | |
986f0783 | 2231 | size_t amt; |
78058a5e SL |
2232 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
2233 | ||
2234 | /* Count the number of input BFDs and find the top input section id. */ | |
2235 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2236 | input_bfd != NULL; | |
c72f2fb2 | 2237 | input_bfd = input_bfd->link.next) |
78058a5e SL |
2238 | { |
2239 | bfd_count += 1; | |
2240 | for (section = input_bfd->sections; | |
2241 | section != NULL; | |
2242 | section = section->next) | |
2243 | { | |
2244 | if (top_id < section->id) | |
2245 | top_id = section->id; | |
2246 | } | |
2247 | } | |
2248 | ||
2249 | htab->bfd_count = bfd_count; | |
2250 | ||
2251 | amt = sizeof (struct map_stub) * (top_id + 1); | |
2252 | htab->stub_group = bfd_zmalloc (amt); | |
2253 | if (htab->stub_group == NULL) | |
2254 | return -1; | |
2255 | ||
2256 | /* We can't use output_bfd->section_count here to find the top output | |
2257 | section index as some sections may have been removed, and | |
2258 | strip_excluded_output_sections doesn't renumber the indices. */ | |
2259 | for (section = output_bfd->sections, top_index = 0; | |
2260 | section != NULL; | |
2261 | section = section->next) | |
2262 | { | |
2263 | if (top_index < section->index) | |
2264 | top_index = section->index; | |
2265 | } | |
2266 | ||
2267 | htab->top_index = top_index; | |
2268 | amt = sizeof (asection *) * (top_index + 1); | |
2269 | input_list = bfd_malloc (amt); | |
2270 | htab->input_list = input_list; | |
2271 | if (input_list == NULL) | |
2272 | return -1; | |
2273 | ||
2274 | /* For sections we aren't interested in, mark their entries with a | |
2275 | value we can check later. */ | |
2276 | list = input_list + top_index; | |
2277 | do | |
2278 | *list = bfd_abs_section_ptr; | |
2279 | while (list-- != input_list); | |
2280 | ||
2281 | for (section = output_bfd->sections; | |
2282 | section != NULL; | |
2283 | section = section->next) | |
2284 | { | |
2285 | /* FIXME: This is a bit of hack. Currently our .ctors and .dtors | |
2286 | * have PC relative relocs in them but no code flag set. */ | |
2287 | if (((section->flags & SEC_CODE) != 0) || | |
2288 | strcmp(".ctors", section->name) || | |
2289 | strcmp(".dtors", section->name)) | |
2290 | input_list[section->index] = NULL; | |
2291 | } | |
2292 | ||
2293 | return 1; | |
2294 | } | |
2295 | ||
2296 | /* The linker repeatedly calls this function for each input section, | |
2297 | in the order that input sections are linked into output sections. | |
2298 | Build lists of input sections to determine groupings between which | |
2299 | we may insert linker stubs. */ | |
2300 | void | |
2301 | nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec) | |
2302 | { | |
2303 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); | |
2304 | ||
2305 | if (isec->output_section->index <= htab->top_index) | |
2306 | { | |
2307 | asection **list = htab->input_list + isec->output_section->index; | |
2308 | if (*list != bfd_abs_section_ptr) | |
2309 | { | |
2310 | /* Steal the last_sec pointer for our list. | |
2311 | This happens to make the list in reverse order, | |
2312 | which is what we want. */ | |
2313 | htab->stub_group[isec->id].last_sec = *list; | |
2314 | *list = isec; | |
2315 | } | |
2316 | } | |
2317 | } | |
2318 | ||
2319 | /* Segment mask for CALL26 relocation relaxation. */ | |
2320 | #define CALL26_SEGMENT(x) ((x) & 0xf0000000) | |
2321 | ||
2322 | /* Fudge factor for approximate maximum size of all stubs that might | |
2323 | be inserted by the linker. This does not actually limit the number | |
2324 | of stubs that might be inserted, and only affects strategy for grouping | |
2325 | and placement of stubs. Perhaps this should be computed based on number | |
2326 | of relocations seen, or be specifiable on the command line. */ | |
2327 | #define MAX_STUB_SECTION_SIZE 0xffff | |
2328 | ||
2329 | /* See whether we can group stub sections together. Grouping stub | |
2330 | sections may result in fewer stubs. More importantly, we need to | |
2331 | put all .init* and .fini* stubs at the end of the .init or | |
2332 | .fini output sections respectively, because glibc splits the | |
2333 | _init and _fini functions into multiple parts. Putting a stub in | |
2334 | the middle of a function is not a good idea. | |
2335 | Rather than computing groups of a maximum fixed size, for Nios II | |
2336 | CALL26 relaxation it makes more sense to compute the groups based on | |
2337 | sections that fit within a 256MB address segment. Also do not allow | |
2338 | a group to span more than one output section, since different output | |
2339 | sections might correspond to different memory banks on a bare-metal | |
2340 | target, etc. */ | |
2341 | static void | |
2342 | group_sections (struct elf32_nios2_link_hash_table *htab) | |
2343 | { | |
2344 | asection **list = htab->input_list + htab->top_index; | |
2345 | do | |
2346 | { | |
2347 | /* The list is in reverse order so we'll search backwards looking | |
2348 | for the first section that begins in the same memory segment, | |
2349 | marking sections along the way to point at the tail for this | |
2350 | group. */ | |
2351 | asection *tail = *list; | |
2352 | if (tail == bfd_abs_section_ptr) | |
2353 | continue; | |
2354 | while (tail != NULL) | |
2355 | { | |
2356 | bfd_vma start = tail->output_section->vma + tail->output_offset; | |
2357 | bfd_vma end = start + tail->size; | |
2358 | bfd_vma segment = CALL26_SEGMENT (end); | |
2359 | asection *prev; | |
2360 | ||
2361 | if (segment != CALL26_SEGMENT (start) | |
2362 | || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE)) | |
2363 | /* This section spans more than one memory segment, or is | |
2364 | close enough to the end of the segment that adding stub | |
2365 | sections before it might cause it to move so that it | |
2366 | spans memory segments, or that stubs added at the end of | |
2367 | this group might overflow into the next memory segment. | |
2368 | Put it in a group by itself to localize the effects. */ | |
2369 | { | |
2370 | prev = htab->stub_group[tail->id].last_sec; | |
2371 | htab->stub_group[tail->id].last_sec = tail; | |
2372 | htab->stub_group[tail->id].first_sec = tail; | |
2373 | } | |
2374 | else | |
2375 | /* Collect more sections for this group. */ | |
2376 | { | |
2377 | asection *curr, *first; | |
2378 | for (curr = tail; ; curr = prev) | |
2379 | { | |
2380 | prev = htab->stub_group[curr->id].last_sec; | |
2381 | if (!prev | |
2382 | || tail->output_section != prev->output_section | |
2383 | || (CALL26_SEGMENT (prev->output_section->vma | |
2384 | + prev->output_offset) | |
2385 | != segment)) | |
2386 | break; | |
2387 | } | |
2388 | first = curr; | |
2389 | for (curr = tail; ; curr = prev) | |
2390 | { | |
2391 | prev = htab->stub_group[curr->id].last_sec; | |
2392 | htab->stub_group[curr->id].last_sec = tail; | |
2393 | htab->stub_group[curr->id].first_sec = first; | |
2394 | if (curr == first) | |
2395 | break; | |
2396 | } | |
2397 | } | |
2398 | ||
2399 | /* Reset tail for the next group. */ | |
2400 | tail = prev; | |
2401 | } | |
2402 | } | |
2403 | while (list-- != htab->input_list); | |
2404 | free (htab->input_list); | |
2405 | } | |
2406 | ||
2407 | /* Determine the type of stub needed, if any, for a call. */ | |
2408 | static enum elf32_nios2_stub_type | |
2409 | nios2_type_of_stub (asection *input_sec, | |
2410 | const Elf_Internal_Rela *rel, | |
2411 | struct elf32_nios2_link_hash_entry *hh, | |
2412 | struct elf32_nios2_link_hash_table *htab, | |
2413 | bfd_vma destination, | |
2414 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
2415 | { | |
2416 | bfd_vma location, segment, start, end; | |
2417 | asection *s0, *s1, *s; | |
2418 | ||
2419 | if (hh != NULL && | |
2420 | !(hh->root.root.type == bfd_link_hash_defined | |
2421 | || hh->root.root.type == bfd_link_hash_defweak)) | |
2422 | return nios2_stub_none; | |
2423 | ||
2424 | /* Determine where the call point is. */ | |
2425 | location = (input_sec->output_section->vma | |
2426 | + input_sec->output_offset + rel->r_offset); | |
2427 | segment = CALL26_SEGMENT (location); | |
2428 | ||
2429 | /* Nios II CALL and JMPI instructions can transfer control to addresses | |
2430 | within the same 256MB segment as the PC. */ | |
2431 | if (segment == CALL26_SEGMENT (destination)) | |
2432 | return nios2_stub_none; | |
2433 | ||
2434 | /* Find the start and end addresses of the stub group. Also account for | |
2435 | any already-created stub sections for this group. Note that for stubs | |
2436 | in the end section, only the first instruction of the last stub | |
2437 | (12 bytes long) needs to be within range. */ | |
2438 | s0 = htab->stub_group[input_sec->id].first_sec; | |
2439 | s = htab->stub_group[s0->id].first_stub_sec; | |
2440 | if (s != NULL && s->size > 0) | |
2441 | start = s->output_section->vma + s->output_offset; | |
2442 | else | |
2443 | start = s0->output_section->vma + s0->output_offset; | |
2444 | ||
2445 | s1 = htab->stub_group[input_sec->id].last_sec; | |
2446 | s = htab->stub_group[s1->id].last_stub_sec; | |
2447 | if (s != NULL && s->size > 0) | |
2448 | end = s->output_section->vma + s->output_offset + s->size - 8; | |
2449 | else | |
2450 | end = s1->output_section->vma + s1->output_offset + s1->size; | |
2451 | ||
2452 | BFD_ASSERT (start < end); | |
2453 | BFD_ASSERT (start <= location); | |
2454 | BFD_ASSERT (location < end); | |
2455 | ||
2456 | /* Put stubs at the end of the group unless that is not a valid | |
2457 | location and the beginning of the group is. It might be that | |
2458 | neither the beginning nor end works if we have an input section | |
2459 | so large that it spans multiple segment boundaries. In that | |
2460 | case, punt; the end result will be a relocation overflow error no | |
2461 | matter what we do here. | |
2462 | ||
2463 | Note that adding stubs pushes up the addresses of all subsequent | |
2464 | sections, so that stubs allocated on one pass through the | |
2465 | relaxation loop may not be valid on the next pass. (E.g., we may | |
2466 | allocate a stub at the beginning of the section on one pass and | |
2467 | find that the call site has been bumped into the next memory | |
2468 | segment on the next pass.) The important thing to note is that | |
2469 | we never try to reclaim the space allocated to such unused stubs, | |
2470 | so code size and section addresses can only increase with each | |
2471 | iteration. Accounting for the start and end addresses of the | |
2472 | already-created stub sections ensures that when the algorithm | |
2473 | converges, it converges accurately, with the entire appropriate | |
2474 | stub section accessible from the call site and not just the | |
2475 | address at the start or end of the stub group proper. */ | |
2476 | ||
2477 | if (segment == CALL26_SEGMENT (end)) | |
2478 | return nios2_stub_call26_after; | |
2479 | else if (segment == CALL26_SEGMENT (start)) | |
2480 | return nios2_stub_call26_before; | |
2481 | else | |
2482 | /* Perhaps this should be a dedicated error code. */ | |
2483 | return nios2_stub_none; | |
2484 | } | |
2485 | ||
2486 | static bfd_boolean | |
2487 | nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) | |
2488 | { | |
2489 | struct elf32_nios2_stub_hash_entry *hsh | |
2490 | = (struct elf32_nios2_stub_hash_entry *) gen_entry; | |
2491 | asection *stub_sec = hsh->stub_sec; | |
2492 | bfd_vma sym_value; | |
abf874aa | 2493 | struct bfd_link_info *info; |
78058a5e | 2494 | |
abf874aa CL |
2495 | info = (struct bfd_link_info *) in_arg; |
2496 | ||
2497 | /* Fail if the target section could not be assigned to an output | |
2498 | section. The user should fix his linker script. */ | |
2499 | if (hsh->target_section->output_section == NULL | |
2500 | && info->non_contiguous_regions) | |
2501 | { | |
2502 | _bfd_error_handler (_("Could not assign '%pA' to an output section. " | |
2503 | "Retry without --enable-non-contiguous-regions.\n"), | |
2504 | hsh->target_section); | |
2505 | abort(); | |
2506 | } | |
78058a5e SL |
2507 | /* Make a note of the offset within the stubs for this entry. */ |
2508 | hsh->stub_offset = stub_sec->size; | |
2509 | ||
2510 | switch (hsh->stub_type) | |
2511 | { | |
2512 | case nios2_stub_call26_before: | |
2513 | case nios2_stub_call26_after: | |
2514 | /* A call26 stub looks like: | |
2515 | orhi at, %hiadj(dest) | |
2516 | addi at, at, %lo(dest) | |
2517 | jmp at | |
2518 | Note that call/jmpi instructions can't be used in PIC code | |
2519 | so there is no reason for the stub to be PIC, either. */ | |
2520 | sym_value = (hsh->target_value | |
2521 | + hsh->target_section->output_offset | |
2522 | + hsh->target_section->output_section->vma | |
2523 | + hsh->addend); | |
2524 | ||
2525 | nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry, | |
2526 | hsh->stub_offset, 3); | |
2527 | nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset, | |
2528 | hiadj (sym_value)); | |
2529 | nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4, | |
2530 | (sym_value & 0xffff)); | |
2531 | stub_sec->size += 12; | |
2532 | break; | |
2533 | default: | |
2534 | BFD_FAIL (); | |
2535 | return FALSE; | |
2536 | } | |
2537 | ||
2538 | return TRUE; | |
2539 | } | |
2540 | ||
2541 | /* As above, but don't actually build the stub. Just bump offset so | |
2542 | we know stub section sizes. */ | |
2543 | static bfd_boolean | |
2544 | nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) | |
2545 | { | |
2546 | struct elf32_nios2_stub_hash_entry *hsh | |
2547 | = (struct elf32_nios2_stub_hash_entry *) gen_entry; | |
2548 | ||
2549 | switch (hsh->stub_type) | |
2550 | { | |
2551 | case nios2_stub_call26_before: | |
2552 | case nios2_stub_call26_after: | |
2553 | hsh->stub_sec->size += 12; | |
2554 | break; | |
2555 | default: | |
2556 | BFD_FAIL (); | |
2557 | return FALSE; | |
2558 | } | |
2559 | return TRUE; | |
2560 | } | |
2561 | ||
2562 | /* Read in all local syms for all input bfds. | |
2563 | Returns -1 on error, 0 otherwise. */ | |
2564 | ||
2565 | static int | |
2566 | get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd, | |
2567 | struct bfd_link_info *info) | |
2568 | { | |
2569 | unsigned int bfd_indx; | |
2570 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
2571 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); | |
2572 | ||
2573 | /* We want to read in symbol extension records only once. To do this | |
2574 | we need to read in the local symbols in parallel and save them for | |
2575 | later use; so hold pointers to the local symbols in an array. */ | |
986f0783 | 2576 | size_t amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
78058a5e SL |
2577 | all_local_syms = bfd_zmalloc (amt); |
2578 | htab->all_local_syms = all_local_syms; | |
2579 | if (all_local_syms == NULL) | |
2580 | return -1; | |
2581 | ||
2582 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
2583 | for (bfd_indx = 0; | |
2584 | input_bfd != NULL; | |
c72f2fb2 | 2585 | input_bfd = input_bfd->link.next, bfd_indx++) |
78058a5e SL |
2586 | { |
2587 | Elf_Internal_Shdr *symtab_hdr; | |
2588 | ||
2589 | /* We'll need the symbol table in a second. */ | |
2590 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2591 | if (symtab_hdr->sh_info == 0) | |
2592 | continue; | |
2593 | ||
2594 | /* We need an array of the local symbols attached to the input bfd. */ | |
2595 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2596 | if (local_syms == NULL) | |
2597 | { | |
2598 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2599 | symtab_hdr->sh_info, 0, | |
2600 | NULL, NULL, NULL); | |
2601 | /* Cache them for elf_link_input_bfd. */ | |
2602 | symtab_hdr->contents = (unsigned char *) local_syms; | |
2603 | } | |
2604 | if (local_syms == NULL) | |
2605 | return -1; | |
2606 | ||
2607 | all_local_syms[bfd_indx] = local_syms; | |
2608 | } | |
2609 | ||
2610 | return 0; | |
2611 | } | |
2612 | ||
2613 | /* Determine and set the size of the stub section for a final link. */ | |
2614 | bfd_boolean | |
2615 | nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd, | |
2616 | struct bfd_link_info *info, | |
2617 | asection *(*add_stub_section) (const char *, | |
2618 | asection *, bfd_boolean), | |
2619 | void (*layout_sections_again) (void)) | |
2620 | { | |
2621 | bfd_boolean stub_changed = FALSE; | |
2622 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); | |
2623 | ||
2624 | /* Stash our params away. */ | |
2625 | htab->stub_bfd = stub_bfd; | |
2626 | htab->add_stub_section = add_stub_section; | |
2627 | htab->layout_sections_again = layout_sections_again; | |
2628 | ||
2629 | /* FIXME: We only compute the section groups once. This could cause | |
2630 | problems if adding a large stub section causes following sections, | |
2631 | or parts of them, to move into another segment. However, this seems | |
2632 | to be consistent with the way other back ends handle this.... */ | |
2633 | group_sections (htab); | |
2634 | ||
2635 | if (get_local_syms (output_bfd, info->input_bfds, info)) | |
2636 | { | |
2637 | if (htab->all_local_syms) | |
2638 | goto error_ret_free_local; | |
2639 | return FALSE; | |
2640 | } | |
2641 | ||
2642 | while (1) | |
2643 | { | |
2644 | bfd *input_bfd; | |
2645 | unsigned int bfd_indx; | |
2646 | asection *stub_sec; | |
2647 | ||
2648 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2649 | input_bfd != NULL; | |
c72f2fb2 | 2650 | input_bfd = input_bfd->link.next, bfd_indx++) |
78058a5e SL |
2651 | { |
2652 | Elf_Internal_Shdr *symtab_hdr; | |
2653 | asection *section; | |
2654 | Elf_Internal_Sym *local_syms; | |
2655 | ||
2656 | /* We'll need the symbol table in a second. */ | |
2657 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2658 | if (symtab_hdr->sh_info == 0) | |
2659 | continue; | |
2660 | ||
2661 | local_syms = htab->all_local_syms[bfd_indx]; | |
2662 | ||
2663 | /* Walk over each section attached to the input bfd. */ | |
2664 | for (section = input_bfd->sections; | |
2665 | section != NULL; | |
2666 | section = section->next) | |
2667 | { | |
2668 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2669 | ||
2670 | /* If there aren't any relocs, then there's nothing more | |
2671 | to do. */ | |
2672 | if ((section->flags & SEC_RELOC) == 0 | |
2673 | || section->reloc_count == 0) | |
2674 | continue; | |
2675 | ||
2676 | /* If this section is a link-once section that will be | |
2677 | discarded, then don't create any stubs. */ | |
2678 | if (section->output_section == NULL | |
2679 | || section->output_section->owner != output_bfd) | |
2680 | continue; | |
2681 | ||
2682 | /* Get the relocs. */ | |
2683 | internal_relocs | |
2684 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, | |
2685 | info->keep_memory); | |
2686 | if (internal_relocs == NULL) | |
2687 | goto error_ret_free_local; | |
2688 | ||
2689 | /* Now examine each relocation. */ | |
2690 | irela = internal_relocs; | |
2691 | irelaend = irela + section->reloc_count; | |
2692 | for (; irela < irelaend; irela++) | |
2693 | { | |
2694 | unsigned int r_type, r_indx; | |
2695 | enum elf32_nios2_stub_type stub_type; | |
2696 | struct elf32_nios2_stub_hash_entry *hsh; | |
2697 | asection *sym_sec; | |
2698 | bfd_vma sym_value; | |
2699 | bfd_vma destination; | |
2700 | struct elf32_nios2_link_hash_entry *hh; | |
2701 | char *stub_name; | |
2702 | const asection *id_sec; | |
2703 | ||
2704 | r_type = ELF32_R_TYPE (irela->r_info); | |
2705 | r_indx = ELF32_R_SYM (irela->r_info); | |
2706 | ||
2707 | if (r_type >= (unsigned int) R_NIOS2_ILLEGAL) | |
2708 | { | |
2709 | bfd_set_error (bfd_error_bad_value); | |
2710 | error_ret_free_internal: | |
2711 | if (elf_section_data (section)->relocs == NULL) | |
2712 | free (internal_relocs); | |
2713 | goto error_ret_free_local; | |
2714 | } | |
2715 | ||
2716 | /* Only look for stubs on CALL and JMPI instructions. */ | |
2717 | if (r_type != (unsigned int) R_NIOS2_CALL26) | |
2718 | continue; | |
2719 | ||
2720 | /* Now determine the call target, its name, value, | |
2721 | section. */ | |
2722 | sym_sec = NULL; | |
2723 | sym_value = 0; | |
2724 | destination = 0; | |
2725 | hh = NULL; | |
2726 | if (r_indx < symtab_hdr->sh_info) | |
2727 | { | |
2728 | /* It's a local symbol. */ | |
2729 | Elf_Internal_Sym *sym; | |
2730 | Elf_Internal_Shdr *hdr; | |
2731 | unsigned int shndx; | |
2732 | ||
2733 | sym = local_syms + r_indx; | |
2734 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2735 | sym_value = sym->st_value; | |
2736 | shndx = sym->st_shndx; | |
2737 | if (shndx < elf_numsections (input_bfd)) | |
2738 | { | |
2739 | hdr = elf_elfsections (input_bfd)[shndx]; | |
2740 | sym_sec = hdr->bfd_section; | |
2741 | destination = (sym_value + irela->r_addend | |
2742 | + sym_sec->output_offset | |
2743 | + sym_sec->output_section->vma); | |
2744 | } | |
2745 | } | |
2746 | else | |
2747 | { | |
2748 | /* It's an external symbol. */ | |
2749 | int e_indx; | |
2750 | ||
2751 | e_indx = r_indx - symtab_hdr->sh_info; | |
2752 | hh = ((struct elf32_nios2_link_hash_entry *) | |
2753 | elf_sym_hashes (input_bfd)[e_indx]); | |
2754 | ||
2755 | while (hh->root.root.type == bfd_link_hash_indirect | |
2756 | || hh->root.root.type == bfd_link_hash_warning) | |
2757 | hh = ((struct elf32_nios2_link_hash_entry *) | |
2758 | hh->root.root.u.i.link); | |
2759 | ||
2760 | if (hh->root.root.type == bfd_link_hash_defined | |
2761 | || hh->root.root.type == bfd_link_hash_defweak) | |
2762 | { | |
2763 | sym_sec = hh->root.root.u.def.section; | |
2764 | sym_value = hh->root.root.u.def.value; | |
2765 | ||
2766 | if (sym_sec->output_section != NULL) | |
2767 | destination = (sym_value + irela->r_addend | |
2768 | + sym_sec->output_offset | |
2769 | + sym_sec->output_section->vma); | |
2770 | else | |
2771 | continue; | |
2772 | } | |
2773 | else if (hh->root.root.type == bfd_link_hash_undefweak) | |
2774 | { | |
0e1862bb | 2775 | if (! bfd_link_pic (info)) |
78058a5e SL |
2776 | continue; |
2777 | } | |
2778 | else if (hh->root.root.type == bfd_link_hash_undefined) | |
2779 | { | |
2780 | if (! (info->unresolved_syms_in_objects == RM_IGNORE | |
2781 | && (ELF_ST_VISIBILITY (hh->root.other) | |
2782 | == STV_DEFAULT))) | |
2783 | continue; | |
2784 | } | |
2785 | else | |
2786 | { | |
2787 | bfd_set_error (bfd_error_bad_value); | |
2788 | goto error_ret_free_internal; | |
2789 | } | |
2790 | } | |
2791 | ||
2792 | /* Determine what (if any) linker stub is needed. */ | |
2793 | stub_type = nios2_type_of_stub (section, irela, hh, htab, | |
2794 | destination, info); | |
2795 | if (stub_type == nios2_stub_none) | |
2796 | continue; | |
2797 | ||
2798 | /* Support for grouping stub sections. */ | |
2799 | if (stub_type == nios2_stub_call26_before) | |
2800 | id_sec = htab->stub_group[section->id].first_sec; | |
2801 | else | |
2802 | id_sec = htab->stub_group[section->id].last_sec; | |
2803 | ||
2804 | /* Get the name of this stub. */ | |
2805 | stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela, | |
2806 | stub_type); | |
2807 | if (!stub_name) | |
2808 | goto error_ret_free_internal; | |
2809 | ||
2810 | hsh = nios2_stub_hash_lookup (&htab->bstab, | |
2811 | stub_name, | |
2812 | FALSE, FALSE); | |
2813 | if (hsh != NULL) | |
2814 | { | |
2815 | /* The proper stub has already been created. */ | |
2816 | free (stub_name); | |
2817 | continue; | |
2818 | } | |
2819 | ||
2820 | hsh = nios2_add_stub (stub_name, section, htab, stub_type); | |
2821 | if (hsh == NULL) | |
2822 | { | |
2823 | free (stub_name); | |
2824 | goto error_ret_free_internal; | |
2825 | } | |
2826 | hsh->target_value = sym_value; | |
2827 | hsh->target_section = sym_sec; | |
2828 | hsh->stub_type = stub_type; | |
2829 | hsh->hh = hh; | |
2830 | hsh->addend = irela->r_addend; | |
2831 | stub_changed = TRUE; | |
2832 | } | |
2833 | ||
2834 | /* We're done with the internal relocs, free them. */ | |
2835 | if (elf_section_data (section)->relocs == NULL) | |
2836 | free (internal_relocs); | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | if (!stub_changed) | |
2841 | break; | |
2842 | ||
2843 | /* OK, we've added some stubs. Find out the new size of the | |
2844 | stub sections. */ | |
2845 | for (stub_sec = htab->stub_bfd->sections; | |
2846 | stub_sec != NULL; | |
2847 | stub_sec = stub_sec->next) | |
2848 | stub_sec->size = 0; | |
2849 | ||
2850 | bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab); | |
2851 | ||
2852 | /* Ask the linker to do its stuff. */ | |
2853 | (*htab->layout_sections_again) (); | |
2854 | stub_changed = FALSE; | |
2855 | } | |
2856 | ||
2857 | free (htab->all_local_syms); | |
2858 | return TRUE; | |
2859 | ||
2860 | error_ret_free_local: | |
2861 | free (htab->all_local_syms); | |
2862 | return FALSE; | |
2863 | } | |
2864 | ||
2865 | /* Build all the stubs associated with the current output file. The | |
2866 | stubs are kept in a hash table attached to the main linker hash | |
2867 | table. This function is called via nios2elf_finish in the linker. */ | |
2868 | bfd_boolean | |
2869 | nios2_elf32_build_stubs (struct bfd_link_info *info) | |
2870 | { | |
2871 | asection *stub_sec; | |
2872 | struct bfd_hash_table *table; | |
2873 | struct elf32_nios2_link_hash_table *htab; | |
2874 | ||
2875 | htab = elf32_nios2_hash_table (info); | |
2876 | ||
2877 | for (stub_sec = htab->stub_bfd->sections; | |
2878 | stub_sec != NULL; | |
2879 | stub_sec = stub_sec->next) | |
1511baec SL |
2880 | /* The stub_bfd may contain non-stub sections if it is also the |
2881 | dynobj. Any such non-stub sections are created with the | |
2882 | SEC_LINKER_CREATED flag set, while stub sections do not | |
2883 | have that flag. Ignore any non-stub sections here. */ | |
2884 | if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) | |
1b786873 | 2885 | { |
1511baec SL |
2886 | bfd_size_type size; |
2887 | ||
2888 | /* Allocate memory to hold the linker stubs. */ | |
2889 | size = stub_sec->size; | |
2890 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
2891 | if (stub_sec->contents == NULL && size != 0) | |
2892 | return FALSE; | |
2893 | stub_sec->size = 0; | |
2894 | } | |
78058a5e SL |
2895 | |
2896 | /* Build the stubs as directed by the stub hash table. */ | |
2897 | table = &htab->bstab; | |
2898 | bfd_hash_traverse (table, nios2_build_one_stub, info); | |
2899 | ||
2900 | return TRUE; | |
2901 | } | |
2902 | ||
2903 | ||
965b1d80 SL |
2904 | #define is_nios2_elf(bfd) \ |
2905 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
2906 | && elf_object_id (bfd) == NIOS2_ELF_DATA) | |
2907 | ||
2908 | /* Merge backend specific data from an object file to the output | |
2909 | object file when linking. */ | |
2910 | ||
2911 | static bfd_boolean | |
50e03d47 | 2912 | nios2_elf32_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
965b1d80 | 2913 | { |
50e03d47 | 2914 | bfd *obfd = info->output_bfd; |
965b1d80 SL |
2915 | flagword old_flags; |
2916 | flagword new_flags; | |
2917 | ||
2918 | if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd)) | |
2919 | return TRUE; | |
2920 | ||
2921 | /* Check if we have the same endianness. */ | |
50e03d47 | 2922 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
965b1d80 SL |
2923 | return FALSE; |
2924 | ||
2925 | new_flags = elf_elfheader (ibfd)->e_flags; | |
2926 | old_flags = elf_elfheader (obfd)->e_flags; | |
2927 | if (!elf_flags_init (obfd)) | |
2928 | { | |
2929 | /* First call, no flags set. */ | |
2930 | elf_flags_init (obfd) = TRUE; | |
2931 | elf_elfheader (obfd)->e_flags = new_flags; | |
2932 | ||
2933 | switch (new_flags) | |
2934 | { | |
2935 | default: | |
2936 | case EF_NIOS2_ARCH_R1: | |
2937 | bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1); | |
2938 | break; | |
2939 | case EF_NIOS2_ARCH_R2: | |
2940 | if (bfd_big_endian (ibfd)) | |
2941 | { | |
4eca0228 | 2942 | _bfd_error_handler |
38f14ab8 | 2943 | (_("error: %pB: big-endian R2 is not supported"), ibfd); |
965b1d80 SL |
2944 | bfd_set_error (bfd_error_bad_value); |
2945 | return FALSE; | |
2946 | } | |
2947 | bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2); | |
2948 | break; | |
2949 | } | |
2950 | } | |
2951 | ||
2952 | /* Incompatible flags. */ | |
2953 | else if (new_flags != old_flags) | |
2954 | { | |
2955 | /* So far, the only incompatible flags denote incompatible | |
2956 | architectures. */ | |
4eca0228 | 2957 | _bfd_error_handler |
695344c0 | 2958 | /* xgettext:c-format */ |
38f14ab8 | 2959 | (_("error: %pB: conflicting CPU architectures %d/%d"), |
965b1d80 SL |
2960 | ibfd, new_flags, old_flags); |
2961 | bfd_set_error (bfd_error_bad_value); | |
2962 | return FALSE; | |
2963 | } | |
2964 | ||
2965 | /* Merge Tag_compatibility attributes and any common GNU ones. */ | |
50e03d47 | 2966 | _bfd_elf_merge_object_attributes (ibfd, info); |
965b1d80 SL |
2967 | |
2968 | return TRUE; | |
2969 | } | |
2970 | ||
36591ba1 SL |
2971 | /* Implement bfd_elf32_bfd_reloc_type_lookup: |
2972 | Given a BFD reloc type, return a howto structure. */ | |
f3185997 | 2973 | |
36591ba1 | 2974 | static reloc_howto_type * |
8c163c5a | 2975 | nios2_elf32_bfd_reloc_type_lookup (bfd *abfd, |
36591ba1 SL |
2976 | bfd_reloc_code_real_type code) |
2977 | { | |
2978 | int i; | |
1b786873 | 2979 | |
f3185997 | 2980 | for (i = 0; i < (int) ARRAY_SIZE (nios2_reloc_map); ++i) |
36591ba1 | 2981 | if (nios2_reloc_map[i].bfd_val == code) |
8c163c5a | 2982 | return lookup_howto (nios2_reloc_map[i].elf_val, abfd); |
36591ba1 SL |
2983 | return NULL; |
2984 | } | |
2985 | ||
2986 | /* Implement bfd_elf32_bfd_reloc_name_lookup: | |
2987 | Given a reloc name, return a howto structure. */ | |
f3185997 | 2988 | |
36591ba1 | 2989 | static reloc_howto_type * |
8c163c5a | 2990 | nios2_elf32_bfd_reloc_name_lookup (bfd *abfd, |
36591ba1 SL |
2991 | const char *r_name) |
2992 | { | |
8c163c5a SL |
2993 | int i; |
2994 | reloc_howto_type *howto_tbl; | |
2995 | int howto_tbl_size; | |
36591ba1 | 2996 | |
8c163c5a SL |
2997 | if (BFD_IS_R2 (abfd)) |
2998 | { | |
2999 | howto_tbl = elf_nios2_r2_howto_table_rel; | |
f3185997 | 3000 | howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel); |
8c163c5a SL |
3001 | } |
3002 | else | |
3003 | { | |
3004 | howto_tbl = elf_nios2_r1_howto_table_rel; | |
f3185997 | 3005 | howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel); |
8c163c5a | 3006 | } |
1b786873 | 3007 | |
8c163c5a SL |
3008 | for (i = 0; i < howto_tbl_size; i++) |
3009 | if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0) | |
3010 | return howto_tbl + i; | |
f3185997 | 3011 | |
1b786873 | 3012 | return NULL; |
36591ba1 SL |
3013 | } |
3014 | ||
3015 | /* Implement elf_info_to_howto: | |
3016 | Given a ELF32 relocation, fill in a arelent structure. */ | |
f3185997 NC |
3017 | |
3018 | static bfd_boolean | |
8c163c5a | 3019 | nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr, |
36591ba1 SL |
3020 | Elf_Internal_Rela *dst) |
3021 | { | |
3022 | unsigned int r_type; | |
3023 | ||
3024 | r_type = ELF32_R_TYPE (dst->r_info); | |
f3185997 NC |
3025 | if ((cache_ptr->howto = lookup_howto (r_type, abfd)) == NULL) |
3026 | { | |
3027 | /* xgettext:c-format */ | |
3028 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
3029 | abfd, r_type); | |
3030 | bfd_set_error (bfd_error_bad_value); | |
3031 | return FALSE; | |
3032 | } | |
3033 | return TRUE; | |
36591ba1 SL |
3034 | } |
3035 | ||
3036 | /* Return the base VMA address which should be subtracted from real addresses | |
3037 | when resolving @dtpoff relocation. | |
3038 | This is PT_TLS segment p_vaddr. */ | |
3039 | static bfd_vma | |
3040 | dtpoff_base (struct bfd_link_info *info) | |
3041 | { | |
3042 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
3043 | if (elf_hash_table (info)->tls_sec == NULL) | |
3044 | return 0; | |
3045 | return elf_hash_table (info)->tls_sec->vma; | |
3046 | } | |
3047 | ||
3048 | /* Return the relocation value for @tpoff relocation | |
3049 | if STT_TLS virtual address is ADDRESS. */ | |
3050 | static bfd_vma | |
3051 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
3052 | { | |
3053 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3054 | ||
3055 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
3056 | if (htab->tls_sec == NULL) | |
3057 | return 0; | |
3058 | return address - htab->tls_sec->vma; | |
3059 | } | |
3060 | ||
3061 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a | |
3062 | dangerous relocation. */ | |
3063 | static bfd_boolean | |
3064 | nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info) | |
3065 | { | |
3066 | ||
3067 | bfd_boolean gp_found; | |
3068 | struct bfd_hash_entry *h; | |
3069 | struct bfd_link_hash_entry *lh; | |
3070 | ||
3071 | /* If we've already figured out what GP will be, just return it. */ | |
3072 | *pgp = _bfd_get_gp_value (output_bfd); | |
3073 | if (*pgp) | |
3074 | return TRUE; | |
3075 | ||
3076 | h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE); | |
3077 | lh = (struct bfd_link_hash_entry *) h; | |
dc1e8a47 | 3078 | lookup: |
36591ba1 SL |
3079 | if (lh) |
3080 | { | |
3081 | switch (lh->type) | |
3082 | { | |
3083 | case bfd_link_hash_undefined: | |
3084 | case bfd_link_hash_undefweak: | |
3085 | case bfd_link_hash_common: | |
3086 | gp_found = FALSE; | |
3087 | break; | |
3088 | case bfd_link_hash_defined: | |
3089 | case bfd_link_hash_defweak: | |
3090 | gp_found = TRUE; | |
a7be2893 SL |
3091 | { |
3092 | asection *sym_sec = lh->u.def.section; | |
3093 | bfd_vma sym_value = lh->u.def.value; | |
3094 | ||
3095 | if (sym_sec->output_section) | |
3096 | sym_value = (sym_value + sym_sec->output_offset | |
3097 | + sym_sec->output_section->vma); | |
3098 | *pgp = sym_value; | |
3099 | } | |
36591ba1 SL |
3100 | break; |
3101 | case bfd_link_hash_indirect: | |
3102 | case bfd_link_hash_warning: | |
3103 | lh = lh->u.i.link; | |
3104 | /* @@FIXME ignoring warning for now */ | |
3105 | goto lookup; | |
3106 | case bfd_link_hash_new: | |
3107 | default: | |
3108 | abort (); | |
3109 | } | |
3110 | } | |
3111 | else | |
3112 | gp_found = FALSE; | |
3113 | ||
3114 | if (!gp_found) | |
3115 | { | |
3116 | /* Only get the error once. */ | |
3117 | *pgp = 4; | |
3118 | _bfd_set_gp_value (output_bfd, *pgp); | |
3119 | return FALSE; | |
3120 | } | |
3121 | ||
3122 | _bfd_set_gp_value (output_bfd, *pgp); | |
3123 | ||
3124 | return TRUE; | |
3125 | } | |
3126 | ||
3127 | /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous | |
3128 | if it's not available as we don't have a link_info pointer available here | |
3129 | to look it up in the output symbol table. We don't need to adjust the | |
3130 | symbol value for an external symbol if we are producing relocatable | |
3131 | output. */ | |
3132 | static bfd_reloc_status_type | |
1b786873 | 3133 | nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, |
36591ba1 SL |
3134 | char **error_message, bfd_vma *pgp) |
3135 | { | |
3136 | if (bfd_is_und_section (symbol->section) && !relocatable) | |
3137 | { | |
3138 | *pgp = 0; | |
3139 | return bfd_reloc_undefined; | |
3140 | } | |
3141 | ||
3142 | *pgp = _bfd_get_gp_value (output_bfd); | |
3143 | if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
3144 | { | |
3145 | if (relocatable) | |
3146 | { | |
3147 | /* Make up a value. */ | |
3148 | *pgp = symbol->section->output_section->vma + 0x4000; | |
3149 | _bfd_set_gp_value (output_bfd, *pgp); | |
3150 | } | |
3151 | else | |
3152 | { | |
3153 | *error_message | |
3154 | = (char *) _("global pointer relative relocation when _gp not defined"); | |
3155 | return bfd_reloc_dangerous; | |
3156 | } | |
3157 | } | |
3158 | ||
3159 | return bfd_reloc_ok; | |
3160 | } | |
3161 | ||
36591ba1 SL |
3162 | /* Do the relocations that require special handling. */ |
3163 | static bfd_reloc_status_type | |
1b786873 | 3164 | nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto, |
25153ba0 | 3165 | asection *input_section, |
1b786873 | 3166 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3167 | bfd_vma symbol_value, bfd_vma addend) |
3168 | { | |
3169 | symbol_value = symbol_value + addend; | |
3170 | addend = 0; | |
3171 | symbol_value = (symbol_value >> 16) & 0xffff; | |
3172 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3173 | data, offset, symbol_value, addend); | |
3174 | } | |
3175 | ||
3176 | static bfd_reloc_status_type | |
3177 | nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3178 | asection *input_section, |
1b786873 | 3179 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3180 | bfd_vma symbol_value, bfd_vma addend) |
3181 | { | |
3182 | symbol_value = symbol_value + addend; | |
3183 | addend = 0; | |
3184 | symbol_value = symbol_value & 0xffff; | |
3185 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3186 | data, offset, symbol_value, addend); | |
3187 | } | |
3188 | ||
3189 | static bfd_reloc_status_type | |
3190 | nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3191 | asection *input_section, |
36591ba1 SL |
3192 | bfd_byte *data, bfd_vma offset, |
3193 | bfd_vma symbol_value, bfd_vma addend) | |
3194 | { | |
3195 | symbol_value = symbol_value + addend; | |
3196 | addend = 0; | |
3197 | symbol_value = hiadj(symbol_value); | |
3198 | return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, | |
3199 | symbol_value, addend); | |
3200 | } | |
3201 | ||
3202 | static bfd_reloc_status_type | |
3203 | nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3204 | asection *input_section, |
36591ba1 SL |
3205 | bfd_byte *data, bfd_vma offset, |
3206 | bfd_vma symbol_value, bfd_vma addend) | |
3207 | { | |
3208 | symbol_value = symbol_value + addend; | |
3209 | addend = 0; | |
3210 | symbol_value = symbol_value & 0xffff; | |
3211 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3212 | data, offset, symbol_value, addend); | |
3213 | } | |
3214 | ||
3215 | static bfd_reloc_status_type | |
3216 | nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3217 | asection *input_section, |
36591ba1 SL |
3218 | bfd_byte *data, bfd_vma offset, |
3219 | bfd_vma symbol_value, bfd_vma addend) | |
3220 | { | |
3221 | symbol_value = symbol_value + addend; | |
3222 | symbol_value -= (input_section->output_section->vma | |
3223 | + input_section->output_offset); | |
3224 | symbol_value -= offset; | |
3225 | addend = 0; | |
3226 | symbol_value = hiadj(symbol_value); | |
3227 | return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, | |
3228 | symbol_value, addend); | |
3229 | } | |
3230 | ||
3231 | static bfd_reloc_status_type | |
3232 | nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3233 | asection *input_section, |
1b786873 | 3234 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3235 | bfd_vma symbol_value, bfd_vma addend) |
3236 | { | |
1b786873 | 3237 | /* NIOS2 pc relative relocations are relative to the next 32-bit instruction |
36591ba1 SL |
3238 | so we need to subtract 4 before doing a final_link_relocate. */ |
3239 | symbol_value = symbol_value + addend - 4; | |
3240 | addend = 0; | |
3241 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3242 | data, offset, symbol_value, addend); | |
3243 | } | |
3244 | ||
3245 | static bfd_reloc_status_type | |
3246 | nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3247 | asection *input_section, |
1b786873 | 3248 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3249 | bfd_vma symbol_value, bfd_vma addend) |
3250 | { | |
3251 | /* Check that the relocation is in the same page as the current address. */ | |
1b786873 | 3252 | if (CALL26_SEGMENT (symbol_value + addend) |
78058a5e SL |
3253 | != CALL26_SEGMENT (input_section->output_section->vma |
3254 | + input_section->output_offset | |
3255 | + offset)) | |
36591ba1 SL |
3256 | return bfd_reloc_overflow; |
3257 | ||
8c163c5a SL |
3258 | /* Check that the target address is correctly aligned on a 4-byte |
3259 | boundary. */ | |
3260 | if ((symbol_value + addend) & 0x3) | |
3261 | return bfd_reloc_overflow; | |
3262 | ||
36591ba1 SL |
3263 | return _bfd_final_link_relocate (howto, abfd, input_section, |
3264 | data, offset, symbol_value, addend); | |
3265 | } | |
3266 | ||
3267 | static bfd_reloc_status_type | |
3268 | nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3269 | asection *input_section, |
1b786873 | 3270 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3271 | bfd_vma symbol_value, bfd_vma addend) |
3272 | { | |
3273 | /* Because we need the output_bfd, the special handling is done | |
3274 | in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */ | |
3275 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3276 | data, offset, symbol_value, addend); | |
3277 | } | |
3278 | ||
3279 | static bfd_reloc_status_type | |
3280 | nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3281 | asection *input_section, |
1b786873 | 3282 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3283 | bfd_vma symbol_value, bfd_vma addend) |
3284 | { | |
3285 | bfd_vma symbol_lo16, symbol_hi16; | |
3286 | bfd_reloc_status_type r; | |
3287 | symbol_value = symbol_value + addend; | |
3288 | addend = 0; | |
3289 | symbol_hi16 = (symbol_value >> 16) & 0xffff; | |
3290 | symbol_lo16 = symbol_value & 0xffff; | |
3291 | ||
3292 | r = _bfd_final_link_relocate (howto, abfd, input_section, | |
3293 | data, offset, symbol_hi16, addend); | |
3294 | ||
3295 | if (r == bfd_reloc_ok) | |
3296 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3297 | data, offset + 4, symbol_lo16, addend); | |
3298 | ||
3299 | return r; | |
3300 | } | |
3301 | ||
3302 | static bfd_reloc_status_type | |
3303 | nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3304 | asection *input_section, |
1b786873 | 3305 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3306 | bfd_vma symbol_value, bfd_vma addend) |
3307 | { | |
3308 | bfd_vma symbol_lo16, symbol_hi16; | |
3309 | bfd_reloc_status_type r; | |
3310 | symbol_value = symbol_value + addend; | |
3311 | addend = 0; | |
3312 | symbol_hi16 = (symbol_value >> 16) & 0xffff; | |
3313 | symbol_lo16 = symbol_value & 0xffff; | |
3314 | ||
3315 | r = _bfd_final_link_relocate (howto, abfd, input_section, | |
3316 | data, offset, symbol_hi16, addend); | |
3317 | ||
3318 | if (r == bfd_reloc_ok) | |
3319 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3320 | data, offset + 4, symbol_lo16, addend); | |
3321 | ||
3322 | return r; | |
3323 | } | |
3324 | ||
3325 | static bfd_reloc_status_type | |
3326 | nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 3327 | asection *input_section, |
1b786873 | 3328 | bfd_byte *data, bfd_vma offset, |
36591ba1 SL |
3329 | bfd_vma symbol_value, bfd_vma addend) |
3330 | { | |
3331 | bfd_vma symbol_lo16, symbol_hi16; | |
3332 | bfd_reloc_status_type r; | |
3333 | symbol_value = symbol_value + addend; | |
3334 | addend = 0; | |
3335 | symbol_hi16 = (symbol_value >> 16) & 0xffff; | |
3336 | symbol_lo16 = symbol_value & 0xffff; | |
3337 | ||
3338 | r = _bfd_final_link_relocate (howto, abfd, input_section, | |
3339 | data, offset, symbol_hi16, addend); | |
3340 | ||
3341 | if (r == bfd_reloc_ok) | |
3342 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
3343 | data, offset + 4, symbol_lo16, addend); | |
3344 | ||
3345 | return r; | |
3346 | } | |
3347 | ||
3348 | /* HOWTO handlers for relocations that require special handling. */ | |
3349 | ||
3350 | /* This is for relocations used only when relaxing to ensure | |
3351 | changes in size of section don't screw up .align. */ | |
3352 | static bfd_reloc_status_type | |
3353 | nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, | |
1b786873 L |
3354 | asymbol *symbol ATTRIBUTE_UNUSED, |
3355 | void *data ATTRIBUTE_UNUSED, asection *input_section, | |
3356 | bfd *output_bfd, | |
36591ba1 SL |
3357 | char **error_message ATTRIBUTE_UNUSED) |
3358 | { | |
3359 | if (output_bfd != NULL) | |
3360 | reloc_entry->address += input_section->output_offset; | |
3361 | return bfd_reloc_ok; | |
3362 | } | |
3363 | ||
3364 | static bfd_reloc_status_type | |
1b786873 L |
3365 | nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
3366 | void *data, asection *input_section, | |
3367 | bfd *output_bfd, | |
36591ba1 SL |
3368 | char **error_message ATTRIBUTE_UNUSED) |
3369 | { | |
3370 | /* This part is from bfd_elf_generic_reloc. */ | |
3371 | if (output_bfd != NULL | |
3372 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3373 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3374 | { | |
3375 | reloc_entry->address += input_section->output_offset; | |
3376 | return bfd_reloc_ok; | |
3377 | } | |
3378 | ||
3379 | if (output_bfd != NULL) | |
3380 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3381 | return bfd_reloc_continue; | |
3382 | ||
3383 | return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto, | |
3384 | input_section, | |
3385 | data, reloc_entry->address, | |
3386 | (symbol->value | |
3387 | + symbol->section->output_section->vma | |
3388 | + symbol->section->output_offset), | |
3389 | reloc_entry->addend); | |
3390 | } | |
3391 | ||
3392 | static bfd_reloc_status_type | |
3393 | nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 L |
3394 | void *data, asection *input_section, |
3395 | bfd *output_bfd, | |
36591ba1 SL |
3396 | char **error_message ATTRIBUTE_UNUSED) |
3397 | { | |
3398 | /* This part is from bfd_elf_generic_reloc. */ | |
3399 | if (output_bfd != NULL | |
3400 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3401 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3402 | { | |
3403 | reloc_entry->address += input_section->output_offset; | |
3404 | return bfd_reloc_ok; | |
3405 | } | |
3406 | ||
3407 | if (output_bfd != NULL) | |
3408 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3409 | return bfd_reloc_continue; | |
3410 | ||
3411 | return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto, | |
3412 | input_section, | |
3413 | data, reloc_entry->address, | |
3414 | (symbol->value | |
3415 | + symbol->section->output_section->vma | |
3416 | + symbol->section->output_offset), | |
3417 | reloc_entry->addend); | |
3418 | } | |
3419 | ||
3420 | static bfd_reloc_status_type | |
3421 | nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 L |
3422 | void *data, asection *input_section, |
3423 | bfd *output_bfd, | |
36591ba1 SL |
3424 | char **error_message ATTRIBUTE_UNUSED) |
3425 | { | |
3426 | /* This part is from bfd_elf_generic_reloc. */ | |
3427 | if (output_bfd != NULL | |
3428 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3429 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3430 | { | |
3431 | reloc_entry->address += input_section->output_offset; | |
3432 | return bfd_reloc_ok; | |
3433 | } | |
3434 | ||
3435 | if (output_bfd != NULL) | |
3436 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3437 | return bfd_reloc_continue; | |
3438 | ||
3439 | return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto, | |
3440 | input_section, | |
3441 | data, reloc_entry->address, | |
3442 | (symbol->value | |
3443 | + symbol->section->output_section->vma | |
3444 | + symbol->section->output_offset), | |
3445 | reloc_entry->addend); | |
3446 | } | |
3447 | ||
3448 | static bfd_reloc_status_type | |
3449 | nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry, | |
3450 | asymbol *symbol, void *data, | |
3451 | asection *input_section, bfd *output_bfd, | |
3452 | char **error_message ATTRIBUTE_UNUSED) | |
3453 | { | |
3454 | /* This part is from bfd_elf_generic_reloc. */ | |
3455 | if (output_bfd != NULL | |
3456 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3457 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3458 | { | |
3459 | reloc_entry->address += input_section->output_offset; | |
3460 | return bfd_reloc_ok; | |
3461 | } | |
3462 | ||
3463 | if (output_bfd != NULL) | |
3464 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3465 | return bfd_reloc_continue; | |
3466 | ||
3467 | return nios2_elf32_do_pcrel_lo16_relocate ( | |
3468 | abfd, reloc_entry->howto, input_section, data, reloc_entry->address, | |
3469 | (symbol->value + symbol->section->output_section->vma | |
3470 | + symbol->section->output_offset), | |
3471 | reloc_entry->addend); | |
3472 | } | |
3473 | ||
3474 | static bfd_reloc_status_type | |
3475 | nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, | |
3476 | asymbol *symbol, void *data, | |
3477 | asection *input_section, bfd *output_bfd, | |
3478 | char **error_message ATTRIBUTE_UNUSED) | |
3479 | { | |
3480 | /* This part is from bfd_elf_generic_reloc. */ | |
3481 | if (output_bfd != NULL | |
3482 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3483 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3484 | { | |
3485 | reloc_entry->address += input_section->output_offset; | |
3486 | return bfd_reloc_ok; | |
3487 | } | |
3488 | ||
3489 | if (output_bfd != NULL) | |
3490 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3491 | return bfd_reloc_continue; | |
3492 | ||
3493 | return nios2_elf32_do_pcrel_hiadj16_relocate ( | |
3494 | abfd, reloc_entry->howto, input_section, data, reloc_entry->address, | |
3495 | (symbol->value + symbol->section->output_section->vma | |
3496 | + symbol->section->output_offset), | |
3497 | reloc_entry->addend); | |
3498 | } | |
3499 | ||
3500 | static bfd_reloc_status_type | |
3501 | nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 L |
3502 | void *data, asection *input_section, |
3503 | bfd *output_bfd, | |
36591ba1 SL |
3504 | char **error_message ATTRIBUTE_UNUSED) |
3505 | { | |
3506 | /* This part is from bfd_elf_generic_reloc. */ | |
3507 | if (output_bfd != NULL | |
3508 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3509 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3510 | { | |
3511 | reloc_entry->address += input_section->output_offset; | |
3512 | return bfd_reloc_ok; | |
3513 | } | |
3514 | ||
3515 | if (output_bfd != NULL) | |
3516 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3517 | return bfd_reloc_continue; | |
3518 | ||
3519 | return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto, | |
3520 | input_section, | |
3521 | data, reloc_entry->address, | |
3522 | (symbol->value | |
3523 | + symbol->section->output_section->vma | |
3524 | + symbol->section->output_offset), | |
3525 | reloc_entry->addend); | |
3526 | } | |
3527 | ||
3528 | static bfd_reloc_status_type | |
3529 | nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 L |
3530 | void *data, asection *input_section, |
3531 | bfd *output_bfd, | |
36591ba1 SL |
3532 | char **error_message ATTRIBUTE_UNUSED) |
3533 | { | |
3534 | /* This part is from bfd_elf_generic_reloc. */ | |
3535 | if (output_bfd != NULL | |
3536 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3537 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3538 | { | |
3539 | reloc_entry->address += input_section->output_offset; | |
3540 | return bfd_reloc_ok; | |
3541 | } | |
3542 | ||
3543 | if (output_bfd != NULL) | |
3544 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3545 | return bfd_reloc_continue; | |
3546 | ||
3547 | return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto, | |
3548 | input_section, | |
3549 | data, reloc_entry->address, | |
3550 | (symbol->value | |
3551 | + symbol->section->output_section->vma | |
3552 | + symbol->section->output_offset), | |
3553 | reloc_entry->addend); | |
3554 | } | |
3555 | ||
3556 | static bfd_reloc_status_type | |
3557 | nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 | 3558 | void *data, asection *input_section, |
36591ba1 SL |
3559 | bfd *output_bfd, char **msg) |
3560 | { | |
3561 | bfd_vma relocation; | |
3562 | bfd_vma gp; | |
3563 | bfd_reloc_status_type r; | |
3564 | ||
3565 | ||
3566 | /* This part is from bfd_elf_generic_reloc. */ | |
3567 | if (output_bfd != NULL | |
3568 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3569 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3570 | { | |
3571 | reloc_entry->address += input_section->output_offset; | |
3572 | return bfd_reloc_ok; | |
3573 | } | |
3574 | ||
3575 | if (output_bfd != NULL) | |
3576 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3577 | return bfd_reloc_continue; | |
3578 | ||
3579 | relocation = (symbol->value | |
3580 | + symbol->section->output_section->vma | |
3581 | + symbol->section->output_offset); | |
3582 | ||
3583 | /* This assumes we've already cached the _gp symbol. */ | |
3584 | r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp); | |
3585 | if (r == bfd_reloc_ok) | |
3586 | { | |
3587 | relocation = relocation + reloc_entry->addend - gp; | |
3588 | reloc_entry->addend = 0; | |
3589 | if ((signed) relocation < -32768 || (signed) relocation > 32767) | |
3590 | { | |
3591 | *msg = _("global pointer relative address out of range"); | |
3592 | r = bfd_reloc_outofrange; | |
3593 | } | |
3594 | else | |
3595 | r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto, | |
3596 | input_section, | |
3597 | data, reloc_entry->address, | |
3598 | relocation, reloc_entry->addend); | |
3599 | } | |
3600 | ||
3601 | return r; | |
3602 | } | |
3603 | ||
3604 | static bfd_reloc_status_type | |
3605 | nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 | 3606 | void *data, asection *input_section, |
36591ba1 SL |
3607 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
3608 | { | |
3609 | /* This part is from bfd_elf_generic_reloc. */ | |
3610 | if (output_bfd != NULL | |
3611 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3612 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3613 | { | |
3614 | reloc_entry->address += input_section->output_offset; | |
3615 | return bfd_reloc_ok; | |
3616 | } | |
3617 | ||
3618 | if (output_bfd != NULL) | |
3619 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3620 | return bfd_reloc_continue; | |
3621 | ||
3622 | return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto, | |
3623 | input_section, | |
3624 | data, reloc_entry->address, | |
3625 | (symbol->value | |
3626 | + symbol->section->output_section->vma | |
3627 | + symbol->section->output_offset), | |
3628 | reloc_entry->addend); | |
3629 | } | |
3630 | ||
3631 | static bfd_reloc_status_type | |
3632 | nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 | 3633 | void *data, asection *input_section, |
36591ba1 SL |
3634 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
3635 | { | |
3636 | /* This part is from bfd_elf_generic_reloc. */ | |
3637 | if (output_bfd != NULL | |
3638 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3639 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3640 | { | |
3641 | reloc_entry->address += input_section->output_offset; | |
3642 | return bfd_reloc_ok; | |
3643 | } | |
3644 | ||
3645 | if (output_bfd != NULL) | |
3646 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3647 | return bfd_reloc_continue; | |
3648 | ||
3649 | return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto, | |
3650 | input_section, | |
3651 | data, reloc_entry->address, | |
3652 | (symbol->value | |
3653 | + symbol->section->output_section->vma | |
3654 | + symbol->section->output_offset), | |
3655 | reloc_entry->addend); | |
3656 | } | |
3657 | ||
3658 | static bfd_reloc_status_type | |
3659 | nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1b786873 | 3660 | void *data, asection *input_section, |
36591ba1 SL |
3661 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
3662 | { | |
3663 | /* This part is from bfd_elf_generic_reloc. */ | |
3664 | if (output_bfd != NULL | |
3665 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
3666 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
3667 | { | |
3668 | reloc_entry->address += input_section->output_offset; | |
3669 | return bfd_reloc_ok; | |
3670 | } | |
3671 | ||
3672 | if (output_bfd != NULL) | |
3673 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
3674 | return bfd_reloc_continue; | |
3675 | ||
3676 | return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto, | |
3677 | input_section, | |
3678 | data, reloc_entry->address, | |
3679 | (symbol->value | |
3680 | + symbol->section->output_section->vma | |
3681 | + symbol->section->output_offset), | |
3682 | reloc_entry->addend); | |
3683 | } | |
3684 | ||
1b786873 | 3685 | |
36591ba1 SL |
3686 | /* Implement elf_backend_relocate_section. */ |
3687 | static bfd_boolean | |
3688 | nios2_elf32_relocate_section (bfd *output_bfd, | |
3689 | struct bfd_link_info *info, | |
3690 | bfd *input_bfd, | |
3691 | asection *input_section, | |
3692 | bfd_byte *contents, | |
3693 | Elf_Internal_Rela *relocs, | |
3694 | Elf_Internal_Sym *local_syms, | |
3695 | asection **local_sections) | |
3696 | { | |
3697 | Elf_Internal_Shdr *symtab_hdr; | |
3698 | struct elf_link_hash_entry **sym_hashes; | |
3699 | Elf_Internal_Rela *rel; | |
3700 | Elf_Internal_Rela *relend; | |
3701 | struct elf32_nios2_link_hash_table *htab; | |
3702 | asection *sgot; | |
3703 | asection *splt; | |
3704 | asection *sreloc = NULL; | |
3705 | bfd_vma *local_got_offsets; | |
82e91538 | 3706 | bfd_vma got_base; |
36591ba1 SL |
3707 | |
3708 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3709 | sym_hashes = elf_sym_hashes (input_bfd); | |
3710 | relend = relocs + input_section->reloc_count; | |
3711 | ||
3712 | htab = elf32_nios2_hash_table (info); | |
3713 | sgot = htab->root.sgot; | |
3714 | splt = htab->root.splt; | |
3715 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
3716 | ||
4ef97a1b | 3717 | if (htab->h_gp_got == NULL) |
82e91538 SL |
3718 | got_base = 0; |
3719 | else | |
4ef97a1b | 3720 | got_base = htab->h_gp_got->root.u.def.value; |
82e91538 | 3721 | |
36591ba1 SL |
3722 | for (rel = relocs; rel < relend; rel++) |
3723 | { | |
3724 | reloc_howto_type *howto; | |
3725 | unsigned long r_symndx; | |
3726 | Elf_Internal_Sym *sym; | |
3727 | asection *sec; | |
3728 | struct elf_link_hash_entry *h; | |
3729 | struct elf32_nios2_link_hash_entry *eh; | |
3730 | bfd_vma relocation; | |
3731 | bfd_vma gp; | |
36591ba1 SL |
3732 | bfd_reloc_status_type r = bfd_reloc_ok; |
3733 | const char *name = NULL; | |
3734 | int r_type; | |
3735 | const char *format; | |
a31b8bd9 AM |
3736 | char *msgbuf = NULL; |
3737 | char *msg = NULL; | |
36591ba1 SL |
3738 | bfd_boolean unresolved_reloc; |
3739 | bfd_vma off; | |
3740 | int use_plt; | |
3741 | ||
3742 | r_type = ELF32_R_TYPE (rel->r_info); | |
3743 | r_symndx = ELF32_R_SYM (rel->r_info); | |
3744 | ||
8c163c5a | 3745 | howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd); |
36591ba1 SL |
3746 | h = NULL; |
3747 | sym = NULL; | |
3748 | sec = NULL; | |
3749 | ||
3750 | if (r_symndx < symtab_hdr->sh_info) | |
3751 | { | |
3752 | sym = local_syms + r_symndx; | |
3753 | sec = local_sections[r_symndx]; | |
3754 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
3755 | } | |
3756 | else | |
3757 | { | |
62d887d4 | 3758 | bfd_boolean warned, ignored; |
36591ba1 SL |
3759 | |
3760 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
3761 | r_symndx, symtab_hdr, sym_hashes, | |
3762 | h, sec, relocation, | |
62d887d4 | 3763 | unresolved_reloc, warned, ignored); |
36591ba1 SL |
3764 | } |
3765 | ||
3766 | if (sec && discarded_section (sec)) | |
3767 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
3768 | rel, 1, relend, howto, 0, contents); | |
3769 | ||
3770 | /* Nothing more to do unless this is a final link. */ | |
0e1862bb | 3771 | if (bfd_link_relocatable (info)) |
36591ba1 SL |
3772 | continue; |
3773 | ||
36591ba1 SL |
3774 | if (howto) |
3775 | { | |
31a53da5 L |
3776 | bfd_boolean resolved_to_zero; |
3777 | ||
3778 | resolved_to_zero = (h != NULL | |
3779 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); | |
36591ba1 SL |
3780 | switch (howto->type) |
3781 | { | |
3782 | case R_NIOS2_HI16: | |
3783 | r = nios2_elf32_do_hi16_relocate (input_bfd, howto, | |
3784 | input_section, | |
3785 | contents, rel->r_offset, | |
3786 | relocation, rel->r_addend); | |
3787 | break; | |
3788 | case R_NIOS2_LO16: | |
3789 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, | |
3790 | input_section, | |
3791 | contents, rel->r_offset, | |
3792 | relocation, rel->r_addend); | |
3793 | break; | |
3794 | case R_NIOS2_PCREL_LO: | |
3795 | r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto, | |
3796 | input_section, | |
3797 | contents, | |
3798 | rel->r_offset, | |
3799 | relocation, | |
3800 | rel->r_addend); | |
3801 | break; | |
3802 | case R_NIOS2_HIADJ16: | |
3803 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, | |
3804 | input_section, contents, | |
3805 | rel->r_offset, relocation, | |
3806 | rel->r_addend); | |
3807 | break; | |
3808 | case R_NIOS2_PCREL_HA: | |
3809 | r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto, | |
3810 | input_section, | |
3811 | contents, | |
3812 | rel->r_offset, | |
3813 | relocation, | |
3814 | rel->r_addend); | |
3815 | break; | |
3816 | case R_NIOS2_PCREL16: | |
3817 | r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto, | |
3818 | input_section, contents, | |
3819 | rel->r_offset, relocation, | |
3820 | rel->r_addend); | |
3821 | break; | |
3822 | case R_NIOS2_GPREL: | |
3823 | /* Turns an absolute address into a gp-relative address. */ | |
3824 | if (!nios2_elf_assign_gp (output_bfd, &gp, info)) | |
3825 | { | |
a7be2893 SL |
3826 | bfd_vma reloc_address; |
3827 | ||
3828 | if (sec && sec->output_section) | |
3829 | reloc_address = (sec->output_section->vma | |
3830 | + sec->output_offset | |
3831 | + rel->r_offset); | |
3832 | else | |
3833 | reloc_address = 0; | |
3834 | ||
36591ba1 | 3835 | format = _("global pointer relative relocation at address " |
a31b8bd9 | 3836 | "%#" PRIx64 " when _gp not defined\n"); |
34d75fb5 AM |
3837 | if (asprintf (&msgbuf, format, |
3838 | (uint64_t) reloc_address) == -1) | |
3839 | msgbuf = NULL; | |
36591ba1 SL |
3840 | msg = msgbuf; |
3841 | r = bfd_reloc_dangerous; | |
3842 | } | |
3843 | else | |
3844 | { | |
3845 | bfd_vma symbol_address = rel->r_addend + relocation; | |
a7be2893 | 3846 | relocation = symbol_address - gp; |
36591ba1 SL |
3847 | rel->r_addend = 0; |
3848 | if (((signed) relocation < -32768 | |
3849 | || (signed) relocation > 32767) | |
3850 | && (!h | |
3851 | || h->root.type == bfd_link_hash_defined | |
3852 | || h->root.type == bfd_link_hash_defweak)) | |
3853 | { | |
a7be2893 SL |
3854 | if (h) |
3855 | name = h->root.root.string; | |
a31b8bd9 AM |
3856 | else |
3857 | { | |
3858 | name = (bfd_elf_string_from_elf_section | |
3859 | (input_bfd, symtab_hdr->sh_link, | |
3860 | sym->st_name)); | |
3861 | if (name == NULL || *name == '\0') | |
fd361982 | 3862 | name = bfd_section_name (sec); |
a31b8bd9 | 3863 | } |
695344c0 | 3864 | /* xgettext:c-format */ |
a31b8bd9 AM |
3865 | format = _("unable to reach %s (at %#" PRIx64 ") from " |
3866 | "the global pointer (at %#" PRIx64 ") " | |
3867 | "because the offset (%" PRId64 ") is out of " | |
3868 | "the allowed range, -32678 to 32767\n" ); | |
34d75fb5 AM |
3869 | if (asprintf (&msgbuf, format, name, |
3870 | (uint64_t) symbol_address, (uint64_t) gp, | |
3871 | (int64_t) relocation) == -1) | |
3872 | msgbuf = NULL; | |
36591ba1 SL |
3873 | msg = msgbuf; |
3874 | r = bfd_reloc_outofrange; | |
3875 | } | |
3876 | else | |
3877 | r = _bfd_final_link_relocate (howto, input_bfd, | |
3878 | input_section, contents, | |
3879 | rel->r_offset, relocation, | |
3880 | rel->r_addend); | |
3881 | } | |
36591ba1 SL |
3882 | break; |
3883 | case R_NIOS2_UJMP: | |
3884 | r = nios2_elf32_do_ujmp_relocate (input_bfd, howto, | |
3885 | input_section, | |
3886 | contents, rel->r_offset, | |
3887 | relocation, rel->r_addend); | |
3888 | break; | |
3889 | case R_NIOS2_CJMP: | |
3890 | r = nios2_elf32_do_cjmp_relocate (input_bfd, howto, | |
3891 | input_section, | |
3892 | contents, rel->r_offset, | |
3893 | relocation, rel->r_addend); | |
3894 | break; | |
3895 | case R_NIOS2_CALLR: | |
3896 | r = nios2_elf32_do_callr_relocate (input_bfd, howto, | |
3897 | input_section, contents, | |
3898 | rel->r_offset, relocation, | |
3899 | rel->r_addend); | |
3900 | break; | |
3901 | case R_NIOS2_CALL26: | |
78058a5e | 3902 | case R_NIOS2_CALL26_NOAT: |
36591ba1 SL |
3903 | /* If we have a call to an undefined weak symbol, we just want |
3904 | to stuff a zero in the bits of the call instruction and | |
3905 | bypass the normal call26 relocation handling, because it'll | |
3906 | diagnose an overflow error if address 0 isn't in the same | |
3907 | 256MB segment as the call site. Presumably the call | |
3908 | should be guarded by a null check anyway. */ | |
3909 | if (h != NULL && h->root.type == bfd_link_hash_undefweak) | |
3910 | { | |
3911 | BFD_ASSERT (relocation == 0 && rel->r_addend == 0); | |
3912 | r = _bfd_final_link_relocate (howto, input_bfd, | |
3913 | input_section, contents, | |
3914 | rel->r_offset, relocation, | |
3915 | rel->r_addend); | |
3916 | break; | |
3917 | } | |
3918 | /* Handle relocations which should use the PLT entry. | |
3919 | NIOS2_BFD_RELOC_32 relocations will use the symbol's value, | |
3920 | which may point to a PLT entry, but we don't need to handle | |
3921 | that here. If we created a PLT entry, all branches in this | |
3922 | object should go to it. */ | |
3923 | if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) | |
3924 | { | |
3925 | /* If we've created a .plt section, and assigned a PLT entry | |
3926 | to this function, it should not be known to bind locally. | |
3927 | If it were, we would have cleared the PLT entry. */ | |
3928 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); | |
3929 | ||
3930 | relocation = (splt->output_section->vma | |
3931 | + splt->output_offset | |
3932 | + h->plt.offset); | |
3933 | ||
3934 | unresolved_reloc = FALSE; | |
3935 | } | |
78058a5e SL |
3936 | /* Detect R_NIOS2_CALL26 relocations that would overflow the |
3937 | 256MB segment. Replace the target with a reference to a | |
3938 | trampoline instead. | |
3939 | Note that htab->stub_group is null if relaxation has been | |
3940 | disabled by the --no-relax linker command-line option, so | |
3941 | we can use that to skip this processing entirely. */ | |
3942 | if (howto->type == R_NIOS2_CALL26 && htab->stub_group) | |
3943 | { | |
3944 | bfd_vma dest = relocation + rel->r_addend; | |
3945 | enum elf32_nios2_stub_type stub_type; | |
3946 | ||
3947 | eh = (struct elf32_nios2_link_hash_entry *)h; | |
3948 | stub_type = nios2_type_of_stub (input_section, rel, eh, | |
3949 | htab, dest, NULL); | |
3950 | ||
3951 | if (stub_type != nios2_stub_none) | |
3952 | { | |
3953 | struct elf32_nios2_stub_hash_entry *hsh; | |
3954 | ||
3955 | hsh = nios2_get_stub_entry (input_section, sec, | |
3956 | eh, rel, htab, stub_type); | |
3957 | if (hsh == NULL) | |
3958 | { | |
3959 | r = bfd_reloc_undefined; | |
3960 | break; | |
3961 | } | |
3962 | ||
3963 | dest = (hsh->stub_offset | |
3964 | + hsh->stub_sec->output_offset | |
3965 | + hsh->stub_sec->output_section->vma); | |
3966 | r = nios2_elf32_do_call26_relocate (input_bfd, howto, | |
3967 | input_section, | |
3968 | contents, | |
3969 | rel->r_offset, | |
3970 | dest, 0); | |
3971 | break; | |
3972 | } | |
3973 | } | |
3974 | ||
3975 | /* Normal case. */ | |
36591ba1 SL |
3976 | r = nios2_elf32_do_call26_relocate (input_bfd, howto, |
3977 | input_section, contents, | |
3978 | rel->r_offset, relocation, | |
3979 | rel->r_addend); | |
3980 | break; | |
3981 | case R_NIOS2_ALIGN: | |
3982 | r = bfd_reloc_ok; | |
3983 | /* For symmetry this would be | |
3984 | r = nios2_elf32_do_ignore_reloc (input_bfd, howto, | |
3985 | input_section, contents, | |
3986 | rel->r_offset, relocation, | |
3987 | rel->r_addend); | |
3988 | but do_ignore_reloc would do no more than return | |
3989 | bfd_reloc_ok. */ | |
3990 | break; | |
3991 | ||
3992 | case R_NIOS2_GOT16: | |
3993 | case R_NIOS2_CALL16: | |
1c2de463 SL |
3994 | case R_NIOS2_GOT_LO: |
3995 | case R_NIOS2_GOT_HA: | |
3996 | case R_NIOS2_CALL_LO: | |
3997 | case R_NIOS2_CALL_HA: | |
36591ba1 SL |
3998 | /* Relocation is to the entry for this symbol in the |
3999 | global offset table. */ | |
4000 | if (sgot == NULL) | |
4001 | { | |
4002 | r = bfd_reloc_notsupported; | |
4003 | break; | |
4004 | } | |
4005 | ||
4006 | use_plt = 0; | |
4007 | ||
4008 | if (h != NULL) | |
4009 | { | |
4010 | bfd_boolean dyn; | |
4011 | ||
4012 | eh = (struct elf32_nios2_link_hash_entry *)h; | |
1c2de463 | 4013 | use_plt = (eh->got_types_used == CALL_USED |
36591ba1 SL |
4014 | && h->plt.offset != (bfd_vma) -1); |
4015 | ||
4016 | off = h->got.offset; | |
4017 | BFD_ASSERT (off != (bfd_vma) -1); | |
4ef97a1b | 4018 | dyn = htab->root.dynamic_sections_created; |
0e1862bb L |
4019 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
4020 | bfd_link_pic (info), | |
4021 | h) | |
4022 | || (bfd_link_pic (info) | |
36591ba1 | 4023 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
31a53da5 L |
4024 | || ((ELF_ST_VISIBILITY (h->other) |
4025 | || resolved_to_zero) | |
36591ba1 SL |
4026 | && h->root.type == bfd_link_hash_undefweak)) |
4027 | { | |
4028 | /* This is actually a static link, or it is a -Bsymbolic | |
4029 | link and the symbol is defined locally. We must | |
4030 | initialize this entry in the global offset table. | |
4031 | Since the offset must always be a multiple of 4, we | |
4032 | use the least significant bit to record whether we | |
4033 | have initialized it already. | |
4034 | ||
4035 | When doing a dynamic link, we create a .rela.got | |
4036 | relocation entry to initialize the value. This is | |
4037 | done in the finish_dynamic_symbol routine. */ | |
4038 | if ((off & 1) != 0) | |
4039 | off &= ~1; | |
4040 | else | |
4041 | { | |
4042 | bfd_put_32 (output_bfd, relocation, | |
4043 | sgot->contents + off); | |
4044 | h->got.offset |= 1; | |
4045 | } | |
4046 | } | |
4047 | else | |
4048 | unresolved_reloc = FALSE; | |
4049 | } | |
4050 | else | |
4051 | { | |
4052 | BFD_ASSERT (local_got_offsets != NULL | |
4053 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
4054 | ||
4055 | off = local_got_offsets[r_symndx]; | |
4056 | ||
4057 | /* The offset must always be a multiple of 4. We use the | |
4058 | least significant bit to record whether we have already | |
4059 | generated the necessary reloc. */ | |
4060 | if ((off & 1) != 0) | |
4061 | off &= ~1; | |
4062 | else | |
4063 | { | |
4064 | bfd_put_32 (output_bfd, relocation, | |
4065 | sgot->contents + off); | |
4066 | ||
0e1862bb | 4067 | if (bfd_link_pic (info)) |
36591ba1 SL |
4068 | { |
4069 | asection *srelgot; | |
4070 | Elf_Internal_Rela outrel; | |
4071 | bfd_byte *loc; | |
4072 | ||
4073 | srelgot = htab->root.srelgot; | |
4074 | BFD_ASSERT (srelgot != NULL); | |
4075 | ||
4076 | outrel.r_addend = relocation; | |
4077 | outrel.r_offset = (sgot->output_section->vma | |
4078 | + sgot->output_offset | |
4079 | + off); | |
4080 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); | |
4081 | loc = srelgot->contents; | |
4082 | loc += (srelgot->reloc_count++ * | |
4083 | sizeof (Elf32_External_Rela)); | |
4084 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4085 | } | |
4086 | ||
4087 | local_got_offsets[r_symndx] |= 1; | |
4088 | } | |
4089 | } | |
4090 | ||
0e1862bb | 4091 | if (use_plt && bfd_link_pic (info)) |
36591ba1 SL |
4092 | { |
4093 | off = ((h->plt.offset - 24) / 12 + 3) * 4; | |
82e91538 SL |
4094 | relocation = (htab->root.sgotplt->output_offset + off |
4095 | - got_base); | |
36591ba1 SL |
4096 | } |
4097 | else | |
82e91538 | 4098 | relocation = sgot->output_offset + off - got_base; |
36591ba1 SL |
4099 | |
4100 | /* This relocation does not use the addend. */ | |
4101 | rel->r_addend = 0; | |
4102 | ||
1c2de463 SL |
4103 | switch (howto->type) |
4104 | { | |
4105 | case R_NIOS2_GOT_LO: | |
4106 | case R_NIOS2_CALL_LO: | |
4107 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, | |
4108 | input_section, contents, | |
4109 | rel->r_offset, relocation, | |
4110 | rel->r_addend); | |
4111 | break; | |
4112 | case R_NIOS2_GOT_HA: | |
4113 | case R_NIOS2_CALL_HA: | |
4114 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, | |
4115 | input_section, contents, | |
4116 | rel->r_offset, | |
4117 | relocation, | |
4118 | rel->r_addend); | |
4119 | break; | |
4120 | default: | |
4121 | r = _bfd_final_link_relocate (howto, input_bfd, | |
4122 | input_section, contents, | |
4123 | rel->r_offset, relocation, | |
4124 | rel->r_addend); | |
4125 | break; | |
4126 | } | |
36591ba1 SL |
4127 | break; |
4128 | ||
4129 | case R_NIOS2_GOTOFF_LO: | |
4130 | case R_NIOS2_GOTOFF_HA: | |
4131 | case R_NIOS2_GOTOFF: | |
82e91538 | 4132 | /* Relocation is relative to the global offset table pointer. */ |
36591ba1 SL |
4133 | |
4134 | BFD_ASSERT (sgot != NULL); | |
4135 | if (sgot == NULL) | |
4136 | { | |
4137 | r = bfd_reloc_notsupported; | |
4138 | break; | |
4139 | } | |
4140 | ||
d9972968 CLT |
4141 | /* Note that sgot->output_offset is not involved in this |
4142 | calculation. We always want the start of .got. */ | |
4143 | relocation -= sgot->output_section->vma; | |
4144 | ||
4145 | /* Now we adjust the relocation to be relative to the GOT pointer | |
4146 | (the _gp_got symbol), which possibly contains the 0x8000 bias. */ | |
4147 | relocation -= got_base; | |
82e91538 | 4148 | |
36591ba1 SL |
4149 | switch (howto->type) |
4150 | { | |
4151 | case R_NIOS2_GOTOFF_LO: | |
4152 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, | |
4153 | input_section, contents, | |
4154 | rel->r_offset, relocation, | |
4155 | rel->r_addend); | |
4156 | break; | |
4157 | case R_NIOS2_GOTOFF_HA: | |
4158 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, | |
4159 | input_section, contents, | |
4160 | rel->r_offset, | |
4161 | relocation, | |
4162 | rel->r_addend); | |
4163 | break; | |
4164 | default: | |
4165 | r = _bfd_final_link_relocate (howto, input_bfd, | |
4166 | input_section, contents, | |
4167 | rel->r_offset, relocation, | |
4168 | rel->r_addend); | |
4169 | break; | |
4170 | } | |
4171 | break; | |
4172 | ||
4173 | case R_NIOS2_TLS_LDO16: | |
4174 | relocation -= dtpoff_base (info) + DTP_OFFSET; | |
4175 | ||
4176 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
4177 | contents, rel->r_offset, | |
4178 | relocation, rel->r_addend); | |
4179 | break; | |
4180 | case R_NIOS2_TLS_LDM16: | |
4181 | if (htab->root.sgot == NULL) | |
4182 | abort (); | |
4183 | ||
4184 | off = htab->tls_ldm_got.offset; | |
4185 | ||
4186 | if ((off & 1) != 0) | |
4187 | off &= ~1; | |
4188 | else | |
4189 | { | |
4190 | /* If we don't know the module number, create a relocation | |
4191 | for it. */ | |
0e1862bb | 4192 | if (bfd_link_pic (info)) |
36591ba1 SL |
4193 | { |
4194 | Elf_Internal_Rela outrel; | |
4195 | bfd_byte *loc; | |
4196 | ||
4197 | if (htab->root.srelgot == NULL) | |
4198 | abort (); | |
4199 | ||
4200 | outrel.r_addend = 0; | |
4201 | outrel.r_offset = (htab->root.sgot->output_section->vma | |
4202 | + htab->root.sgot->output_offset | |
4203 | + off); | |
4204 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD); | |
4205 | ||
4206 | loc = htab->root.srelgot->contents; | |
4207 | loc += (htab->root.srelgot->reloc_count++ | |
4208 | * sizeof (Elf32_External_Rela)); | |
4209 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4210 | } | |
4211 | else | |
4212 | bfd_put_32 (output_bfd, 1, | |
4213 | htab->root.sgot->contents + off); | |
4214 | ||
4215 | htab->tls_ldm_got.offset |= 1; | |
4216 | } | |
4217 | ||
82e91538 | 4218 | relocation = htab->root.sgot->output_offset + off - got_base; |
36591ba1 SL |
4219 | |
4220 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
4221 | contents, rel->r_offset, | |
4222 | relocation, rel->r_addend); | |
4223 | ||
4224 | break; | |
4225 | case R_NIOS2_TLS_GD16: | |
4226 | case R_NIOS2_TLS_IE16: | |
4227 | { | |
4228 | int indx; | |
4229 | char tls_type; | |
4230 | ||
4231 | if (htab->root.sgot == NULL) | |
4232 | abort (); | |
4233 | ||
4234 | indx = 0; | |
4235 | if (h != NULL) | |
4236 | { | |
4237 | bfd_boolean dyn; | |
4238 | dyn = htab->root.dynamic_sections_created; | |
0e1862bb L |
4239 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
4240 | bfd_link_pic (info), | |
4241 | h) | |
4242 | && (!bfd_link_pic (info) | |
36591ba1 SL |
4243 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
4244 | { | |
4245 | unresolved_reloc = FALSE; | |
4246 | indx = h->dynindx; | |
4247 | } | |
4248 | off = h->got.offset; | |
4249 | tls_type = (((struct elf32_nios2_link_hash_entry *) h) | |
4250 | ->tls_type); | |
4251 | } | |
4252 | else | |
4253 | { | |
4254 | if (local_got_offsets == NULL) | |
4255 | abort (); | |
4256 | off = local_got_offsets[r_symndx]; | |
4257 | tls_type = (elf32_nios2_local_got_tls_type (input_bfd) | |
4258 | [r_symndx]); | |
4259 | } | |
4260 | ||
4261 | if (tls_type == GOT_UNKNOWN) | |
4262 | abort (); | |
4263 | ||
4264 | if ((off & 1) != 0) | |
4265 | off &= ~1; | |
4266 | else | |
4267 | { | |
4268 | bfd_boolean need_relocs = FALSE; | |
4269 | Elf_Internal_Rela outrel; | |
4270 | bfd_byte *loc = NULL; | |
4271 | int cur_off = off; | |
4272 | ||
4273 | /* The GOT entries have not been initialized yet. Do it | |
4274 | now, and emit any relocations. If both an IE GOT and a | |
4275 | GD GOT are necessary, we emit the GD first. */ | |
4276 | ||
0e1862bb | 4277 | if ((bfd_link_pic (info) || indx != 0) |
36591ba1 | 4278 | && (h == NULL |
31a53da5 L |
4279 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4280 | && !resolved_to_zero) | |
36591ba1 SL |
4281 | || h->root.type != bfd_link_hash_undefweak)) |
4282 | { | |
4283 | need_relocs = TRUE; | |
4284 | if (htab->root.srelgot == NULL) | |
4285 | abort (); | |
4286 | loc = htab->root.srelgot->contents; | |
4287 | loc += (htab->root.srelgot->reloc_count * | |
4288 | sizeof (Elf32_External_Rela)); | |
4289 | } | |
4290 | ||
4291 | if (tls_type & GOT_TLS_GD) | |
4292 | { | |
4293 | if (need_relocs) | |
4294 | { | |
4295 | outrel.r_addend = 0; | |
4296 | outrel.r_offset = (htab->root.sgot->output_section->vma | |
4297 | + htab->root.sgot->output_offset | |
4298 | + cur_off); | |
4299 | outrel.r_info = ELF32_R_INFO (indx, | |
4300 | R_NIOS2_TLS_DTPMOD); | |
4301 | ||
4302 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
4303 | loc); | |
4304 | htab->root.srelgot->reloc_count++; | |
4305 | loc += sizeof (Elf32_External_Rela); | |
4306 | ||
4307 | if (indx == 0) | |
4308 | bfd_put_32 (output_bfd, | |
4309 | (relocation - dtpoff_base (info) - | |
4310 | DTP_OFFSET), | |
4311 | htab->root.sgot->contents + cur_off + 4); | |
4312 | else | |
4313 | { | |
4314 | outrel.r_addend = 0; | |
4315 | outrel.r_info = ELF32_R_INFO (indx, | |
4316 | R_NIOS2_TLS_DTPREL); | |
4317 | outrel.r_offset += 4; | |
4318 | ||
4319 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
4320 | loc); | |
4321 | htab->root.srelgot->reloc_count++; | |
4322 | loc += sizeof (Elf32_External_Rela); | |
4323 | } | |
4324 | } | |
4325 | else | |
4326 | { | |
4327 | /* If we are not emitting relocations for a | |
4328 | general dynamic reference, then we must be in a | |
4329 | static link or an executable link with the | |
4330 | symbol binding locally. Mark it as belonging | |
4331 | to module 1, the executable. */ | |
4332 | bfd_put_32 (output_bfd, 1, | |
4333 | htab->root.sgot->contents + cur_off); | |
4334 | bfd_put_32 (output_bfd, (relocation - | |
4335 | dtpoff_base (info) - | |
4336 | DTP_OFFSET), | |
4337 | htab->root.sgot->contents + cur_off + 4); | |
4338 | } | |
4339 | ||
4340 | cur_off += 8; | |
4341 | } | |
4342 | ||
4343 | if (tls_type & GOT_TLS_IE) | |
4344 | { | |
4345 | if (need_relocs) | |
4346 | { | |
4347 | if (indx == 0) | |
4348 | outrel.r_addend = (relocation - | |
4349 | dtpoff_base (info)); | |
4350 | else | |
4351 | outrel.r_addend = 0; | |
4352 | outrel.r_offset = (htab->root.sgot->output_section->vma | |
4353 | + htab->root.sgot->output_offset | |
4354 | + cur_off); | |
4355 | outrel.r_info = ELF32_R_INFO (indx, | |
4356 | R_NIOS2_TLS_TPREL); | |
4357 | ||
4358 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
4359 | loc); | |
4360 | htab->root.srelgot->reloc_count++; | |
4361 | loc += sizeof (Elf32_External_Rela); | |
4362 | } | |
4363 | else | |
4364 | bfd_put_32 (output_bfd, (tpoff (info, relocation) | |
4365 | - TP_OFFSET), | |
4366 | htab->root.sgot->contents + cur_off); | |
4367 | cur_off += 4; | |
4368 | } | |
4369 | ||
4370 | if (h != NULL) | |
4371 | h->got.offset |= 1; | |
4372 | else | |
4373 | local_got_offsets[r_symndx] |= 1; | |
4374 | } | |
4375 | ||
4376 | if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16) | |
4377 | off += 8; | |
82e91538 | 4378 | relocation = htab->root.sgot->output_offset + off - got_base; |
36591ba1 SL |
4379 | |
4380 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
4381 | contents, rel->r_offset, | |
4382 | relocation, rel->r_addend); | |
4383 | } | |
4384 | ||
4385 | break; | |
4386 | case R_NIOS2_TLS_LE16: | |
3cbc1e5e | 4387 | if (bfd_link_dll (info)) |
36591ba1 | 4388 | { |
4eca0228 | 4389 | _bfd_error_handler |
695344c0 | 4390 | /* xgettext:c-format */ |
2dcf00ce | 4391 | (_("%pB(%pA+%#" PRIx64 "): %s relocation not " |
36591ba1 SL |
4392 | "permitted in shared object"), |
4393 | input_bfd, input_section, | |
2dcf00ce | 4394 | (uint64_t) rel->r_offset, howto->name); |
36591ba1 SL |
4395 | return FALSE; |
4396 | } | |
4397 | else | |
4398 | relocation = tpoff (info, relocation) - TP_OFFSET; | |
4399 | ||
4400 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
4401 | contents, rel->r_offset, | |
4402 | relocation, rel->r_addend); | |
4403 | break; | |
4404 | ||
4405 | case R_NIOS2_BFD_RELOC_32: | |
0e1862bb | 4406 | if (bfd_link_pic (info) |
36591ba1 SL |
4407 | && (input_section->flags & SEC_ALLOC) != 0 |
4408 | && (h == NULL | |
31a53da5 L |
4409 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4410 | && !resolved_to_zero) | |
36591ba1 SL |
4411 | || h->root.type != bfd_link_hash_undefweak)) |
4412 | { | |
4413 | Elf_Internal_Rela outrel; | |
4414 | bfd_byte *loc; | |
4415 | bfd_boolean skip, relocate; | |
4416 | ||
4417 | /* When generating a shared object, these relocations | |
4418 | are copied into the output file to be resolved at run | |
4419 | time. */ | |
4420 | ||
4421 | skip = FALSE; | |
4422 | relocate = FALSE; | |
4423 | ||
4424 | outrel.r_offset | |
4425 | = _bfd_elf_section_offset (output_bfd, info, | |
4426 | input_section, rel->r_offset); | |
4427 | if (outrel.r_offset == (bfd_vma) -1) | |
4428 | skip = TRUE; | |
4429 | else if (outrel.r_offset == (bfd_vma) -2) | |
4430 | skip = TRUE, relocate = TRUE; | |
4431 | outrel.r_offset += (input_section->output_section->vma | |
4432 | + input_section->output_offset); | |
4433 | ||
4434 | if (skip) | |
4435 | memset (&outrel, 0, sizeof outrel); | |
4436 | else if (h != NULL | |
4437 | && h->dynindx != -1 | |
0e1862bb | 4438 | && (!bfd_link_pic (info) |
a496fbc8 | 4439 | || !SYMBOLIC_BIND (info, h) |
36591ba1 SL |
4440 | || !h->def_regular)) |
4441 | { | |
4442 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
4443 | outrel.r_addend = rel->r_addend; | |
4444 | } | |
4445 | else | |
4446 | { | |
4447 | /* This symbol is local, or marked to become local. */ | |
4448 | outrel.r_addend = relocation + rel->r_addend; | |
4449 | relocate = TRUE; | |
4450 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); | |
4451 | } | |
4452 | ||
4453 | sreloc = elf_section_data (input_section)->sreloc; | |
4454 | if (sreloc == NULL) | |
4455 | abort (); | |
4456 | ||
4457 | loc = sreloc->contents; | |
4458 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
4459 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4460 | ||
4461 | /* This reloc will be computed at runtime, so there's no | |
4462 | need to do anything now, except for R_NIOS2_BFD_RELOC_32 | |
4463 | relocations that have been turned into | |
4464 | R_NIOS2_RELATIVE. */ | |
4465 | if (!relocate) | |
4466 | break; | |
4467 | } | |
4468 | ||
4469 | r = _bfd_final_link_relocate (howto, input_bfd, | |
4470 | input_section, contents, | |
4471 | rel->r_offset, relocation, | |
4472 | rel->r_addend); | |
4473 | break; | |
4474 | ||
4475 | case R_NIOS2_TLS_DTPREL: | |
4476 | relocation -= dtpoff_base (info); | |
4477 | /* Fall through. */ | |
4478 | ||
4479 | default: | |
4480 | r = _bfd_final_link_relocate (howto, input_bfd, | |
4481 | input_section, contents, | |
4482 | rel->r_offset, relocation, | |
4483 | rel->r_addend); | |
4484 | break; | |
4485 | } | |
4486 | } | |
4487 | else | |
4488 | r = bfd_reloc_notsupported; | |
4489 | ||
4490 | if (r != bfd_reloc_ok) | |
4491 | { | |
4492 | if (h != NULL) | |
4493 | name = h->root.root.string; | |
4494 | else | |
4495 | { | |
4496 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4497 | symtab_hdr->sh_link, | |
4498 | sym->st_name); | |
4499 | if (name == NULL || *name == '\0') | |
fd361982 | 4500 | name = bfd_section_name (sec); |
36591ba1 SL |
4501 | } |
4502 | ||
4503 | switch (r) | |
4504 | { | |
4505 | case bfd_reloc_overflow: | |
1a72702b AM |
4506 | (*info->callbacks->reloc_overflow) (info, NULL, name, |
4507 | howto->name, (bfd_vma) 0, | |
4508 | input_bfd, input_section, | |
4509 | rel->r_offset); | |
36591ba1 SL |
4510 | break; |
4511 | ||
4512 | case bfd_reloc_undefined: | |
1a72702b AM |
4513 | (*info->callbacks->undefined_symbol) (info, name, input_bfd, |
4514 | input_section, | |
4515 | rel->r_offset, TRUE); | |
36591ba1 SL |
4516 | break; |
4517 | ||
4518 | case bfd_reloc_outofrange: | |
4519 | if (msg == NULL) | |
4520 | msg = _("relocation out of range"); | |
4521 | break; | |
4522 | ||
4523 | case bfd_reloc_notsupported: | |
4524 | if (msg == NULL) | |
4525 | msg = _("unsupported relocation"); | |
4526 | break; | |
4527 | ||
4528 | case bfd_reloc_dangerous: | |
4529 | if (msg == NULL) | |
4530 | msg = _("dangerous relocation"); | |
4531 | break; | |
4532 | ||
4533 | default: | |
4534 | if (msg == NULL) | |
4535 | msg = _("unknown error"); | |
4536 | break; | |
4537 | } | |
4538 | ||
4539 | if (msg) | |
4540 | { | |
1a72702b AM |
4541 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
4542 | input_section, rel->r_offset); | |
a31b8bd9 AM |
4543 | if (msgbuf) |
4544 | free (msgbuf); | |
36591ba1 SL |
4545 | return FALSE; |
4546 | } | |
4547 | } | |
4548 | } | |
4549 | return TRUE; | |
4550 | } | |
4551 | ||
4552 | /* Implement elf-backend_section_flags: | |
4553 | Convert NIOS2 specific section flags to bfd internal section flags. */ | |
4554 | static bfd_boolean | |
8c803a2d | 4555 | nios2_elf32_section_flags (const Elf_Internal_Shdr *hdr) |
36591ba1 SL |
4556 | { |
4557 | if (hdr->sh_flags & SHF_NIOS2_GPREL) | |
8c803a2d | 4558 | hdr->bfd_section->flags |= SEC_SMALL_DATA; |
36591ba1 SL |
4559 | |
4560 | return TRUE; | |
4561 | } | |
4562 | ||
4563 | /* Implement elf_backend_fake_sections: | |
4564 | Set the correct type for an NIOS2 ELF section. We do this by the | |
4565 | section name, which is a hack, but ought to work. */ | |
4566 | static bfd_boolean | |
4567 | nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, | |
4568 | Elf_Internal_Shdr *hdr, asection *sec) | |
4569 | { | |
fd361982 | 4570 | const char *name = bfd_section_name (sec); |
36591ba1 SL |
4571 | |
4572 | if ((sec->flags & SEC_SMALL_DATA) | |
4573 | || strcmp (name, ".sdata") == 0 | |
4574 | || strcmp (name, ".sbss") == 0 | |
4575 | || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0) | |
4576 | hdr->sh_flags |= SHF_NIOS2_GPREL; | |
4577 | ||
4578 | return TRUE; | |
4579 | } | |
4580 | ||
4581 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
4582 | shortcuts to them in our hash table. */ | |
4583 | static bfd_boolean | |
4584 | create_got_section (bfd *dynobj, struct bfd_link_info *info) | |
4585 | { | |
4586 | struct elf32_nios2_link_hash_table *htab; | |
82e91538 | 4587 | struct elf_link_hash_entry *h; |
36591ba1 SL |
4588 | |
4589 | htab = elf32_nios2_hash_table (info); | |
4590 | ||
4591 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
4592 | return FALSE; | |
4593 | ||
4594 | /* In order for the two loads in .PLTresolve to share the same %hiadj, | |
4595 | _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */ | |
fd361982 | 4596 | if (!bfd_set_section_alignment (htab->root.sgotplt, 4)) |
36591ba1 SL |
4597 | return FALSE; |
4598 | ||
82e91538 SL |
4599 | /* The Nios II ABI specifies that GOT-relative relocations are relative |
4600 | to the linker-created symbol _gp_got, rather than using | |
4601 | _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always | |
4602 | points to the base of the GOT while _gp_got may include a bias. */ | |
4603 | h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt, | |
4604 | "_gp_got"); | |
4ef97a1b | 4605 | htab->h_gp_got = h; |
82e91538 SL |
4606 | if (h == NULL) |
4607 | return FALSE; | |
4608 | ||
36591ba1 SL |
4609 | return TRUE; |
4610 | } | |
4611 | ||
4612 | /* Implement elf_backend_create_dynamic_sections: | |
4613 | Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
4614 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
4615 | hash table. */ | |
4616 | static bfd_boolean | |
4617 | nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) | |
4618 | { | |
4619 | struct elf32_nios2_link_hash_table *htab; | |
4620 | ||
4621 | htab = elf32_nios2_hash_table (info); | |
4622 | if (!htab->root.sgot && !create_got_section (dynobj, info)) | |
4623 | return FALSE; | |
4624 | ||
9d19e4fd AM |
4625 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
4626 | return FALSE; | |
36591ba1 SL |
4627 | |
4628 | /* In order for the two loads in a shared object .PLTresolve to share the | |
4629 | same %hiadj, the start of the PLT (as well as the GOT) must be aligned | |
4630 | to a 16-byte boundary. This is because the addresses for these loads | |
4631 | include the -(.plt+4) PIC correction. */ | |
fd361982 | 4632 | return bfd_set_section_alignment (htab->root.splt, 4); |
36591ba1 SL |
4633 | } |
4634 | ||
4635 | /* Implement elf_backend_copy_indirect_symbol: | |
4636 | Copy the extra info we tack onto an elf_link_hash_entry. */ | |
4637 | static void | |
4638 | nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info, | |
4639 | struct elf_link_hash_entry *dir, | |
4640 | struct elf_link_hash_entry *ind) | |
4641 | { | |
4642 | struct elf32_nios2_link_hash_entry *edir, *eind; | |
4643 | ||
4644 | edir = (struct elf32_nios2_link_hash_entry *) dir; | |
4645 | eind = (struct elf32_nios2_link_hash_entry *) ind; | |
4646 | ||
4647 | if (eind->dyn_relocs != NULL) | |
4648 | { | |
4649 | if (edir->dyn_relocs != NULL) | |
4650 | { | |
3bf083ed AM |
4651 | struct elf_dyn_relocs **pp; |
4652 | struct elf_dyn_relocs *p; | |
36591ba1 SL |
4653 | |
4654 | /* Add reloc counts against the indirect sym to the direct sym | |
4655 | list. Merge any entries against the same section. */ | |
4656 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
4657 | { | |
3bf083ed | 4658 | struct elf_dyn_relocs *q; |
36591ba1 SL |
4659 | |
4660 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
4661 | if (q->sec == p->sec) | |
4662 | { | |
4663 | q->pc_count += p->pc_count; | |
4664 | q->count += p->count; | |
4665 | *pp = p->next; | |
4666 | break; | |
4667 | } | |
4668 | if (q == NULL) | |
4669 | pp = &p->next; | |
4670 | } | |
4671 | *pp = edir->dyn_relocs; | |
4672 | } | |
4673 | ||
4674 | edir->dyn_relocs = eind->dyn_relocs; | |
4675 | eind->dyn_relocs = NULL; | |
4676 | } | |
4677 | ||
4678 | if (ind->root.type == bfd_link_hash_indirect | |
4679 | && dir->got.refcount <= 0) | |
4680 | { | |
4681 | edir->tls_type = eind->tls_type; | |
4682 | eind->tls_type = GOT_UNKNOWN; | |
4683 | } | |
4684 | ||
4685 | edir->got_types_used |= eind->got_types_used; | |
4686 | ||
4687 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
4688 | } | |
4689 | ||
965b1d80 SL |
4690 | /* Set the right machine number for a NIOS2 ELF file. */ |
4691 | ||
4692 | static bfd_boolean | |
4693 | nios2_elf32_object_p (bfd *abfd) | |
4694 | { | |
4695 | unsigned long mach; | |
4696 | ||
4697 | mach = elf_elfheader (abfd)->e_flags; | |
4698 | ||
4699 | switch (mach) | |
4700 | { | |
4701 | default: | |
4702 | case EF_NIOS2_ARCH_R1: | |
4703 | bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1); | |
4704 | break; | |
4705 | case EF_NIOS2_ARCH_R2: | |
4706 | bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2); | |
4707 | break; | |
4708 | } | |
4709 | ||
4710 | return TRUE; | |
4711 | } | |
4712 | ||
36591ba1 SL |
4713 | /* Implement elf_backend_check_relocs: |
4714 | Look through the relocs for a section during the first phase. */ | |
4715 | static bfd_boolean | |
4716 | nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info, | |
4717 | asection *sec, const Elf_Internal_Rela *relocs) | |
4718 | { | |
36591ba1 SL |
4719 | Elf_Internal_Shdr *symtab_hdr; |
4720 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
4721 | const Elf_Internal_Rela *rel; | |
4722 | const Elf_Internal_Rela *rel_end; | |
4723 | struct elf32_nios2_link_hash_table *htab; | |
36591ba1 SL |
4724 | asection *sreloc = NULL; |
4725 | bfd_signed_vma *local_got_refcounts; | |
4726 | ||
0e1862bb | 4727 | if (bfd_link_relocatable (info)) |
36591ba1 SL |
4728 | return TRUE; |
4729 | ||
36591ba1 SL |
4730 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
4731 | sym_hashes = elf_sym_hashes (abfd); | |
4732 | sym_hashes_end = (sym_hashes | |
4733 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); | |
4734 | if (!elf_bad_symtab (abfd)) | |
4735 | sym_hashes_end -= symtab_hdr->sh_info; | |
4736 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
4737 | ||
4738 | htab = elf32_nios2_hash_table (info); | |
36591ba1 SL |
4739 | |
4740 | rel_end = relocs + sec->reloc_count; | |
4741 | for (rel = relocs; rel < rel_end; rel++) | |
4742 | { | |
4743 | unsigned int r_type; | |
4744 | struct elf_link_hash_entry *h; | |
4745 | unsigned long r_symndx; | |
4746 | ||
4747 | r_symndx = ELF32_R_SYM (rel->r_info); | |
4748 | if (r_symndx < symtab_hdr->sh_info) | |
4749 | h = NULL; | |
4750 | else | |
4751 | { | |
4752 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
4753 | while (h->root.type == bfd_link_hash_indirect | |
4754 | || h->root.type == bfd_link_hash_warning) | |
4755 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4756 | } | |
4757 | ||
4758 | r_type = ELF32_R_TYPE (rel->r_info); | |
4759 | ||
4760 | switch (r_type) | |
4761 | { | |
4762 | case R_NIOS2_GOT16: | |
1c2de463 SL |
4763 | case R_NIOS2_GOT_LO: |
4764 | case R_NIOS2_GOT_HA: | |
36591ba1 | 4765 | case R_NIOS2_CALL16: |
1c2de463 SL |
4766 | case R_NIOS2_CALL_LO: |
4767 | case R_NIOS2_CALL_HA: | |
36591ba1 SL |
4768 | case R_NIOS2_TLS_GD16: |
4769 | case R_NIOS2_TLS_IE16: | |
4770 | /* This symbol requires a global offset table entry. */ | |
4771 | { | |
4772 | int tls_type, old_tls_type; | |
4773 | ||
4774 | switch (r_type) | |
4775 | { | |
4776 | default: | |
4777 | case R_NIOS2_GOT16: | |
1c2de463 SL |
4778 | case R_NIOS2_GOT_LO: |
4779 | case R_NIOS2_GOT_HA: | |
36591ba1 | 4780 | case R_NIOS2_CALL16: |
1c2de463 SL |
4781 | case R_NIOS2_CALL_LO: |
4782 | case R_NIOS2_CALL_HA: | |
36591ba1 SL |
4783 | tls_type = GOT_NORMAL; |
4784 | break; | |
4785 | case R_NIOS2_TLS_GD16: | |
4786 | tls_type = GOT_TLS_GD; | |
4787 | break; | |
4788 | case R_NIOS2_TLS_IE16: | |
4789 | tls_type = GOT_TLS_IE; | |
4790 | break; | |
4791 | } | |
4792 | ||
36591ba1 SL |
4793 | if (h != NULL) |
4794 | { | |
4795 | struct elf32_nios2_link_hash_entry *eh | |
4796 | = (struct elf32_nios2_link_hash_entry *)h; | |
4797 | h->got.refcount++; | |
4798 | old_tls_type = elf32_nios2_hash_entry(h)->tls_type; | |
1c2de463 SL |
4799 | if (r_type == R_NIOS2_CALL16 |
4800 | || r_type == R_NIOS2_CALL_LO | |
4801 | || r_type == R_NIOS2_CALL_HA) | |
36591ba1 SL |
4802 | { |
4803 | /* Make sure a plt entry is created for this symbol if | |
4804 | it turns out to be a function defined by a dynamic | |
4805 | object. */ | |
4806 | h->plt.refcount++; | |
4807 | h->needs_plt = 1; | |
4808 | h->type = STT_FUNC; | |
1c2de463 | 4809 | eh->got_types_used |= CALL_USED; |
36591ba1 SL |
4810 | } |
4811 | else | |
1c2de463 | 4812 | eh->got_types_used |= GOT_USED; |
36591ba1 SL |
4813 | } |
4814 | else | |
4815 | { | |
4816 | /* This is a global offset table entry for a local symbol. */ | |
4817 | if (local_got_refcounts == NULL) | |
4818 | { | |
4819 | bfd_size_type size; | |
4820 | ||
4821 | size = symtab_hdr->sh_info; | |
4822 | size *= (sizeof (bfd_signed_vma) + sizeof (char)); | |
4823 | local_got_refcounts | |
4824 | = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); | |
4825 | if (local_got_refcounts == NULL) | |
4826 | return FALSE; | |
4827 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
4828 | elf32_nios2_local_got_tls_type (abfd) | |
4829 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
4830 | } | |
4831 | local_got_refcounts[r_symndx]++; | |
4832 | old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx]; | |
4833 | } | |
4834 | ||
4835 | /* We will already have issued an error message if there is a | |
4836 | TLS / non-TLS mismatch, based on the symbol type. We don't | |
4837 | support any linker relaxations. So just combine any TLS | |
4838 | types needed. */ | |
4839 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL | |
4840 | && tls_type != GOT_NORMAL) | |
4841 | tls_type |= old_tls_type; | |
4842 | ||
4843 | if (old_tls_type != tls_type) | |
4844 | { | |
4845 | if (h != NULL) | |
4846 | elf32_nios2_hash_entry (h)->tls_type = tls_type; | |
4847 | else | |
4848 | elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
4849 | } | |
4850 | } | |
4ef97a1b | 4851 | make_got: |
36591ba1 SL |
4852 | if (htab->root.sgot == NULL) |
4853 | { | |
4854 | if (htab->root.dynobj == NULL) | |
4855 | htab->root.dynobj = abfd; | |
4856 | if (!create_got_section (htab->root.dynobj, info)) | |
4857 | return FALSE; | |
4858 | } | |
4859 | break; | |
4860 | ||
4ef97a1b AM |
4861 | case R_NIOS2_TLS_LDM16: |
4862 | htab->tls_ldm_got.refcount++; | |
4863 | goto make_got; | |
4864 | ||
36591ba1 SL |
4865 | /* This relocation describes the C++ object vtable hierarchy. |
4866 | Reconstruct it for later use during GC. */ | |
4867 | case R_NIOS2_GNU_VTINHERIT: | |
4868 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
4869 | return FALSE; | |
4870 | break; | |
4871 | ||
4872 | /* This relocation describes which C++ vtable entries are actually | |
4873 | used. Record for later use during GC. */ | |
4874 | case R_NIOS2_GNU_VTENTRY: | |
4875 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
4876 | return FALSE; | |
4877 | break; | |
4878 | ||
4879 | case R_NIOS2_BFD_RELOC_32: | |
4880 | case R_NIOS2_CALL26: | |
78058a5e | 4881 | case R_NIOS2_CALL26_NOAT: |
36591ba1 SL |
4882 | case R_NIOS2_HIADJ16: |
4883 | case R_NIOS2_LO16: | |
4884 | ||
4885 | if (h != NULL) | |
4886 | { | |
4887 | /* If this reloc is in a read-only section, we might | |
4888 | need a copy reloc. We can't check reliably at this | |
4889 | stage whether the section is read-only, as input | |
4890 | sections have not yet been mapped to output sections. | |
4891 | Tentatively set the flag for now, and correct in | |
4892 | adjust_dynamic_symbol. */ | |
0e1862bb | 4893 | if (!bfd_link_pic (info)) |
36591ba1 SL |
4894 | h->non_got_ref = 1; |
4895 | ||
4896 | /* Make sure a plt entry is created for this symbol if it | |
4897 | turns out to be a function defined by a dynamic object. */ | |
4898 | h->plt.refcount++; | |
4899 | ||
78058a5e | 4900 | if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT) |
36591ba1 SL |
4901 | h->needs_plt = 1; |
4902 | } | |
4903 | ||
4904 | /* If we are creating a shared library, we need to copy the | |
4905 | reloc into the shared library. */ | |
0e1862bb | 4906 | if (bfd_link_pic (info) |
36591ba1 SL |
4907 | && (sec->flags & SEC_ALLOC) != 0 |
4908 | && (r_type == R_NIOS2_BFD_RELOC_32 | |
4909 | || (h != NULL && ! h->needs_plt | |
a496fbc8 | 4910 | && (! SYMBOLIC_BIND (info, h) || ! h->def_regular)))) |
36591ba1 | 4911 | { |
3bf083ed AM |
4912 | struct elf_dyn_relocs *p; |
4913 | struct elf_dyn_relocs **head; | |
36591ba1 SL |
4914 | |
4915 | /* When creating a shared object, we must copy these | |
4916 | reloc types into the output file. We create a reloc | |
4917 | section in dynobj and make room for this reloc. */ | |
4918 | if (sreloc == NULL) | |
4919 | { | |
4ef97a1b AM |
4920 | if (htab->root.dynobj == NULL) |
4921 | htab->root.dynobj = abfd; | |
4922 | ||
36591ba1 | 4923 | sreloc = _bfd_elf_make_dynamic_reloc_section |
4ef97a1b | 4924 | (sec, htab->root.dynobj, 2, abfd, TRUE); |
36591ba1 SL |
4925 | if (sreloc == NULL) |
4926 | return FALSE; | |
4927 | } | |
4928 | ||
4929 | /* If this is a global symbol, we count the number of | |
4930 | relocations we need for this symbol. */ | |
4931 | if (h != NULL) | |
4932 | head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs; | |
4933 | else | |
4934 | { | |
4935 | /* Track dynamic relocs needed for local syms too. | |
4936 | We really need local syms available to do this | |
4937 | easily. Oh well. */ | |
4938 | ||
4939 | asection *s; | |
4940 | void *vpp; | |
4941 | Elf_Internal_Sym *isym; | |
4942 | ||
4943 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
4944 | abfd, r_symndx); | |
4945 | if (isym == NULL) | |
4946 | return FALSE; | |
4947 | ||
4948 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4949 | if (s == NULL) | |
4950 | s = sec; | |
4951 | ||
4952 | vpp = &elf_section_data (s)->local_dynrel; | |
3bf083ed | 4953 | head = (struct elf_dyn_relocs **) vpp; |
36591ba1 SL |
4954 | } |
4955 | ||
4956 | p = *head; | |
4957 | if (p == NULL || p->sec != sec) | |
4958 | { | |
986f0783 | 4959 | size_t amt = sizeof *p; |
3bf083ed | 4960 | p = ((struct elf_dyn_relocs *) |
36591ba1 SL |
4961 | bfd_alloc (htab->root.dynobj, amt)); |
4962 | if (p == NULL) | |
4963 | return FALSE; | |
4964 | p->next = *head; | |
4965 | *head = p; | |
4966 | p->sec = sec; | |
4967 | p->count = 0; | |
4968 | p->pc_count = 0; | |
4969 | } | |
4970 | ||
4971 | p->count += 1; | |
4972 | ||
4973 | } | |
4974 | break; | |
4975 | } | |
4976 | } | |
4977 | ||
4978 | return TRUE; | |
4979 | } | |
4980 | ||
4981 | ||
4982 | /* Implement elf_backend_gc_mark_hook: | |
4983 | Return the section that should be marked against GC for a given | |
4984 | relocation. */ | |
4985 | static asection * | |
4986 | nios2_elf32_gc_mark_hook (asection *sec, | |
25153ba0 | 4987 | struct bfd_link_info *info, |
36591ba1 SL |
4988 | Elf_Internal_Rela *rel, |
4989 | struct elf_link_hash_entry *h, | |
4990 | Elf_Internal_Sym *sym) | |
4991 | { | |
4992 | if (h != NULL) | |
4993 | switch (ELF32_R_TYPE (rel->r_info)) | |
4994 | { | |
4995 | case R_NIOS2_GNU_VTINHERIT: | |
4996 | case R_NIOS2_GNU_VTENTRY: | |
4997 | return NULL; | |
4998 | } | |
4999 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
5000 | } | |
5001 | ||
36591ba1 SL |
5002 | /* Implement elf_backend_finish_dynamic_symbols: |
5003 | Finish up dynamic symbol handling. We set the contents of various | |
5004 | dynamic sections here. */ | |
5005 | static bfd_boolean | |
5006 | nios2_elf32_finish_dynamic_symbol (bfd *output_bfd, | |
5007 | struct bfd_link_info *info, | |
5008 | struct elf_link_hash_entry *h, | |
5009 | Elf_Internal_Sym *sym) | |
5010 | { | |
5011 | struct elf32_nios2_link_hash_table *htab; | |
5012 | struct elf32_nios2_link_hash_entry *eh | |
5013 | = (struct elf32_nios2_link_hash_entry *)h; | |
5014 | int use_plt; | |
5015 | ||
5016 | htab = elf32_nios2_hash_table (info); | |
5017 | ||
5018 | if (h->plt.offset != (bfd_vma) -1) | |
5019 | { | |
5020 | asection *splt; | |
5021 | asection *sgotplt; | |
5022 | asection *srela; | |
5023 | bfd_vma plt_index; | |
5024 | bfd_vma got_offset; | |
5025 | Elf_Internal_Rela rela; | |
5026 | bfd_byte *loc; | |
5027 | bfd_vma got_address; | |
5028 | ||
5029 | /* This symbol has an entry in the procedure linkage table. Set | |
5030 | it up. */ | |
5031 | BFD_ASSERT (h->dynindx != -1); | |
5032 | splt = htab->root.splt; | |
5033 | sgotplt = htab->root.sgotplt; | |
5034 | srela = htab->root.srelplt; | |
5035 | BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL); | |
5036 | ||
5037 | /* Emit the PLT entry. */ | |
0e1862bb | 5038 | if (bfd_link_pic (info)) |
36591ba1 SL |
5039 | { |
5040 | nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset, | |
5041 | 3); | |
5042 | plt_index = (h->plt.offset - 24) / 12; | |
5043 | got_offset = (plt_index + 3) * 4; | |
5044 | nios2_elf32_install_imm16 (splt, h->plt.offset, | |
5045 | hiadj(plt_index * 4)); | |
5046 | nios2_elf32_install_imm16 (splt, h->plt.offset + 4, | |
5047 | (plt_index * 4) & 0xffff); | |
5048 | nios2_elf32_install_imm16 (splt, h->plt.offset + 8, | |
5049 | 0xfff4 - h->plt.offset); | |
5050 | got_address = (sgotplt->output_section->vma + sgotplt->output_offset | |
5051 | + got_offset); | |
5052 | ||
5053 | /* Fill in the entry in the global offset table. There are no | |
5054 | res_n slots for a shared object PLT, instead the .got.plt entries | |
5055 | point to the PLT entries. */ | |
5056 | bfd_put_32 (output_bfd, | |
5057 | splt->output_section->vma + splt->output_offset | |
5058 | + h->plt.offset, sgotplt->contents + got_offset); | |
5059 | } | |
5060 | else | |
5061 | { | |
5062 | plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12; | |
5063 | got_offset = (plt_index + 3) * 4; | |
5064 | ||
5065 | nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3); | |
5066 | got_address = (sgotplt->output_section->vma + sgotplt->output_offset | |
5067 | + got_offset); | |
5068 | nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address)); | |
5069 | nios2_elf32_install_imm16 (splt, h->plt.offset + 4, | |
5070 | got_address & 0xffff); | |
5071 | ||
5072 | /* Fill in the entry in the global offset table. */ | |
5073 | bfd_put_32 (output_bfd, | |
5074 | splt->output_section->vma + splt->output_offset | |
5075 | + plt_index * 4, sgotplt->contents + got_offset); | |
5076 | } | |
5077 | ||
5078 | /* Fill in the entry in the .rela.plt section. */ | |
5079 | rela.r_offset = got_address; | |
5080 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT); | |
5081 | rela.r_addend = 0; | |
5082 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); | |
5083 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
5084 | ||
5085 | if (!h->def_regular) | |
5086 | { | |
5087 | /* Mark the symbol as undefined, rather than as defined in | |
5088 | the .plt section. Leave the value alone. */ | |
5089 | sym->st_shndx = SHN_UNDEF; | |
5090 | /* If the symbol is weak, we do need to clear the value. | |
5091 | Otherwise, the PLT entry would provide a definition for | |
5092 | the symbol even if the symbol wasn't defined anywhere, | |
5093 | and so the symbol would never be NULL. */ | |
5094 | if (!h->ref_regular_nonweak) | |
5095 | sym->st_value = 0; | |
5096 | } | |
5097 | } | |
5098 | ||
1c2de463 | 5099 | use_plt = (eh->got_types_used == CALL_USED |
36591ba1 SL |
5100 | && h->plt.offset != (bfd_vma) -1); |
5101 | ||
5102 | if (!use_plt && h->got.offset != (bfd_vma) -1 | |
5103 | && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 | |
5104 | && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) | |
5105 | { | |
5106 | asection *sgot; | |
5107 | asection *srela; | |
5108 | Elf_Internal_Rela rela; | |
5109 | bfd_byte *loc; | |
5110 | bfd_vma offset; | |
5111 | ||
5112 | /* This symbol has an entry in the global offset table. Set it | |
5113 | up. */ | |
5114 | sgot = htab->root.sgot; | |
5115 | srela = htab->root.srelgot; | |
5116 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
5117 | ||
5118 | offset = (h->got.offset & ~(bfd_vma) 1); | |
5119 | rela.r_offset = (sgot->output_section->vma | |
5120 | + sgot->output_offset + offset); | |
5121 | ||
5122 | /* If this is a -Bsymbolic link, and the symbol is defined | |
5123 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
5124 | the symbol was forced to be local because of a version file. | |
5125 | The entry in the global offset table will already have been | |
5126 | initialized in the relocate_section function. */ | |
5127 | ||
0e1862bb | 5128 | if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) |
36591ba1 SL |
5129 | { |
5130 | rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); | |
5131 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
5132 | (sgot->contents + offset)); | |
5133 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); | |
5134 | } | |
5135 | else | |
5136 | { | |
5137 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
5138 | sgot->contents + offset); | |
5139 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT); | |
5140 | rela.r_addend = 0; | |
5141 | } | |
5142 | ||
5143 | loc = srela->contents; | |
5144 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
5145 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
5146 | } | |
5147 | ||
5148 | if (use_plt && h->got.offset != (bfd_vma) -1) | |
5149 | { | |
5150 | bfd_vma offset = (h->got.offset & ~(bfd_vma) 1); | |
5151 | asection *sgot = htab->root.sgot; | |
5152 | asection *splt = htab->root.splt; | |
5153 | bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset | |
5154 | + h->plt.offset), | |
5155 | sgot->contents + offset); | |
5156 | } | |
5157 | ||
5158 | if (h->needs_copy) | |
5159 | { | |
5160 | asection *s; | |
5161 | Elf_Internal_Rela rela; | |
5162 | bfd_byte *loc; | |
5163 | ||
5164 | /* This symbol needs a copy reloc. Set it up. */ | |
5165 | BFD_ASSERT (h->dynindx != -1 | |
5166 | && (h->root.type == bfd_link_hash_defined | |
5167 | || h->root.type == bfd_link_hash_defweak)); | |
5168 | ||
36591ba1 SL |
5169 | rela.r_offset = (h->root.u.def.value |
5170 | + h->root.u.def.section->output_section->vma | |
5171 | + h->root.u.def.section->output_offset); | |
5172 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY); | |
5173 | rela.r_addend = 0; | |
afbf7e8e | 5174 | if (h->root.u.def.section == htab->root.sdynrelro) |
5474d94f AM |
5175 | s = htab->root.sreldynrelro; |
5176 | else | |
5177 | s = htab->root.srelbss; | |
5178 | BFD_ASSERT (s != NULL); | |
36591ba1 SL |
5179 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
5180 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
5181 | } | |
5182 | ||
82e91538 | 5183 | /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */ |
36591ba1 | 5184 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
4ef97a1b AM |
5185 | || h == htab->root.hgot |
5186 | || h == htab->h_gp_got) | |
36591ba1 SL |
5187 | sym->st_shndx = SHN_ABS; |
5188 | ||
5189 | return TRUE; | |
5190 | } | |
5191 | ||
5192 | /* Implement elf_backend_finish_dynamic_sections. */ | |
5193 | static bfd_boolean | |
5194 | nios2_elf32_finish_dynamic_sections (bfd *output_bfd, | |
5195 | struct bfd_link_info *info) | |
5196 | { | |
36591ba1 SL |
5197 | asection *sgotplt; |
5198 | asection *sdyn; | |
5199 | struct elf32_nios2_link_hash_table *htab; | |
5200 | ||
5201 | htab = elf32_nios2_hash_table (info); | |
36591ba1 | 5202 | sgotplt = htab->root.sgotplt; |
4ef97a1b | 5203 | sdyn = NULL; |
36591ba1 | 5204 | |
4ef97a1b | 5205 | if (htab->root.dynamic_sections_created) |
36591ba1 SL |
5206 | { |
5207 | asection *splt; | |
5208 | Elf32_External_Dyn *dyncon, *dynconend; | |
5209 | ||
5210 | splt = htab->root.splt; | |
4ef97a1b AM |
5211 | sdyn = bfd_get_linker_section (htab->root.dynobj, ".dynamic"); |
5212 | BFD_ASSERT (splt != NULL && sdyn != NULL && sgotplt != NULL); | |
36591ba1 SL |
5213 | |
5214 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
5215 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
5216 | for (; dyncon < dynconend; dyncon++) | |
5217 | { | |
5218 | Elf_Internal_Dyn dyn; | |
5219 | asection *s; | |
5220 | ||
4ef97a1b | 5221 | bfd_elf32_swap_dyn_in (htab->root.dynobj, dyncon, &dyn); |
36591ba1 SL |
5222 | |
5223 | switch (dyn.d_tag) | |
5224 | { | |
5225 | default: | |
5226 | break; | |
5227 | ||
5228 | case DT_PLTGOT: | |
4ade44b7 AM |
5229 | s = htab->root.sgotplt; |
5230 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
36591ba1 SL |
5231 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
5232 | break; | |
5233 | ||
5234 | case DT_JMPREL: | |
5235 | s = htab->root.srelplt; | |
4ade44b7 | 5236 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
36591ba1 SL |
5237 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
5238 | break; | |
5239 | ||
5240 | case DT_PLTRELSZ: | |
5241 | s = htab->root.srelplt; | |
36591ba1 SL |
5242 | dyn.d_un.d_val = s->size; |
5243 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
5244 | break; | |
5245 | ||
36591ba1 | 5246 | case DT_NIOS2_GP: |
4ade44b7 AM |
5247 | s = htab->root.sgotplt; |
5248 | dyn.d_un.d_ptr | |
5249 | = s->output_section->vma + s->output_offset + 0x7ff0; | |
36591ba1 SL |
5250 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
5251 | break; | |
5252 | } | |
5253 | } | |
5254 | ||
5255 | /* Fill in the first entry in the procedure linkage table. */ | |
5256 | if (splt->size > 0) | |
5257 | { | |
5258 | bfd_vma got_address = (sgotplt->output_section->vma | |
5259 | + sgotplt->output_offset); | |
0e1862bb | 5260 | if (bfd_link_pic (info)) |
36591ba1 | 5261 | { |
33d4099f SL |
5262 | bfd_vma got_pcrel = got_address - (splt->output_section->vma |
5263 | + splt->output_offset); | |
5264 | /* Both GOT and PLT must be aligned to a 16-byte boundary | |
5265 | for the two loads to share the %hiadj part. The 4-byte | |
5266 | offset for nextpc is accounted for in the %lo offsets | |
5267 | on the loads. */ | |
5268 | BFD_ASSERT ((got_pcrel & 0xf) == 0); | |
36591ba1 | 5269 | nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6); |
33d4099f SL |
5270 | nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel)); |
5271 | nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff); | |
5272 | nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff); | |
36591ba1 SL |
5273 | } |
5274 | else | |
5275 | { | |
5276 | /* Divide by 4 here, not 3 because we already corrected for the | |
5277 | res_N branches. */ | |
5278 | bfd_vma res_size = (splt->size - 28) / 4; | |
5279 | bfd_vma res_start = (splt->output_section->vma | |
5280 | + splt->output_offset); | |
5281 | bfd_vma res_offset; | |
5282 | ||
5283 | for (res_offset = 0; res_offset < res_size; res_offset += 4) | |
5284 | bfd_put_32 (output_bfd, | |
5285 | 6 | ((res_size - (res_offset + 4)) << 6), | |
5286 | splt->contents + res_offset); | |
5287 | ||
33d4099f SL |
5288 | /* The GOT must be aligned to a 16-byte boundary for the |
5289 | two loads to share the same %hiadj part. */ | |
5290 | BFD_ASSERT ((got_address & 0xf) == 0); | |
5291 | ||
36591ba1 SL |
5292 | nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7); |
5293 | nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start)); | |
5294 | nios2_elf32_install_imm16 (splt, res_size + 4, | |
5295 | res_start & 0xffff); | |
5296 | nios2_elf32_install_imm16 (splt, res_size + 12, | |
5297 | hiadj (got_address)); | |
5298 | nios2_elf32_install_imm16 (splt, res_size + 16, | |
33d4099f | 5299 | (got_address + 4) & 0xffff); |
36591ba1 | 5300 | nios2_elf32_install_imm16 (splt, res_size + 20, |
33d4099f | 5301 | (got_address + 8) & 0xffff); |
36591ba1 SL |
5302 | } |
5303 | } | |
5304 | } | |
4ef97a1b | 5305 | |
36591ba1 | 5306 | /* Fill in the first three entries in the global offset table. */ |
4ef97a1b | 5307 | if (sgotplt != NULL && sgotplt->size > 0) |
36591ba1 SL |
5308 | { |
5309 | if (sdyn == NULL) | |
5310 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents); | |
5311 | else | |
5312 | bfd_put_32 (output_bfd, | |
5313 | sdyn->output_section->vma + sdyn->output_offset, | |
5314 | sgotplt->contents); | |
5315 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4); | |
5316 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8); | |
36591ba1 | 5317 | |
4ef97a1b AM |
5318 | if (sgotplt->output_section != bfd_abs_section_ptr) |
5319 | elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4; | |
5320 | } | |
36591ba1 SL |
5321 | |
5322 | return TRUE; | |
5323 | } | |
5324 | ||
5325 | /* Implement elf_backend_adjust_dynamic_symbol: | |
5326 | Adjust a symbol defined by a dynamic object and referenced by a | |
5327 | regular object. The current definition is in some section of the | |
5328 | dynamic object, but we're not including those sections. We have to | |
5329 | change the definition to something the rest of the link can | |
5330 | understand. */ | |
5331 | static bfd_boolean | |
5332 | nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info, | |
5333 | struct elf_link_hash_entry *h) | |
5334 | { | |
5335 | struct elf32_nios2_link_hash_table *htab; | |
5336 | bfd *dynobj; | |
5474d94f | 5337 | asection *s, *srel; |
36591ba1 SL |
5338 | unsigned align2; |
5339 | ||
5340 | htab = elf32_nios2_hash_table (info); | |
4ef97a1b | 5341 | dynobj = htab->root.dynobj; |
36591ba1 SL |
5342 | |
5343 | /* Make sure we know what is going on here. */ | |
5344 | BFD_ASSERT (dynobj != NULL | |
5345 | && (h->needs_plt | |
60d67dc8 | 5346 | || h->is_weakalias |
36591ba1 SL |
5347 | || (h->def_dynamic |
5348 | && h->ref_regular | |
5349 | && !h->def_regular))); | |
5350 | ||
5351 | /* If this is a function, put it in the procedure linkage table. We | |
5352 | will fill in the contents of the procedure linkage table later, | |
5353 | when we know the address of the .got section. */ | |
5354 | if (h->type == STT_FUNC || h->needs_plt) | |
5355 | { | |
5356 | if (h->plt.refcount <= 0 | |
5357 | || SYMBOL_CALLS_LOCAL (info, h) | |
5358 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
5359 | && h->root.type == bfd_link_hash_undefweak)) | |
5360 | { | |
5361 | /* This case can occur if we saw a PLT reloc in an input | |
5362 | file, but the symbol was never referred to by a dynamic | |
5363 | object, or if all references were garbage collected. In | |
5364 | such a case, we don't actually need to build a procedure | |
5365 | linkage table, and we can just do a PCREL reloc instead. */ | |
5366 | h->plt.offset = (bfd_vma) -1; | |
5367 | h->needs_plt = 0; | |
5368 | } | |
5369 | ||
5370 | return TRUE; | |
5371 | } | |
5372 | ||
5373 | /* Reinitialize the plt offset now that it is not used as a reference | |
5374 | count any more. */ | |
5375 | h->plt.offset = (bfd_vma) -1; | |
5376 | ||
5377 | /* If this is a weak symbol, and there is a real definition, the | |
5378 | processor independent code will have arranged for us to see the | |
5379 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 5380 | if (h->is_weakalias) |
36591ba1 | 5381 | { |
60d67dc8 AM |
5382 | struct elf_link_hash_entry *def = weakdef (h); |
5383 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
5384 | h->root.u.def.section = def->root.u.def.section; | |
5385 | h->root.u.def.value = def->root.u.def.value; | |
36591ba1 SL |
5386 | return TRUE; |
5387 | } | |
5388 | ||
5389 | /* If there are no non-GOT references, we do not need a copy | |
5390 | relocation. */ | |
5391 | if (!h->non_got_ref) | |
5392 | return TRUE; | |
5393 | ||
5394 | /* This is a reference to a symbol defined by a dynamic object which | |
5395 | is not a function. | |
5396 | If we are creating a shared library, we must presume that the | |
5397 | only references to the symbol are via the global offset table. | |
5398 | For such cases we need not do anything here; the relocations will | |
5399 | be handled correctly by relocate_section. */ | |
0e1862bb | 5400 | if (bfd_link_pic (info)) |
36591ba1 SL |
5401 | return TRUE; |
5402 | ||
5403 | if (h->size == 0) | |
5404 | { | |
4eca0228 AM |
5405 | _bfd_error_handler (_("dynamic variable `%s' is zero size"), |
5406 | h->root.root.string); | |
36591ba1 SL |
5407 | return TRUE; |
5408 | } | |
5409 | ||
5410 | /* We must allocate the symbol in our .dynbss section, which will | |
5411 | become part of the .bss section of the executable. There will be | |
5412 | an entry for this symbol in the .dynsym section. The dynamic | |
5413 | object will contain position independent code, so all references | |
5414 | from the dynamic object to this symbol will go through the global | |
5415 | offset table. The dynamic linker will use the .dynsym entry to | |
5416 | determine the address it must put in the global offset table, so | |
5417 | both the dynamic object and the regular object will refer to the | |
5418 | same memory location for the variable. */ | |
36591ba1 SL |
5419 | /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to |
5420 | copy the initial value out of the dynamic object and into the | |
5421 | runtime process image. We need to remember the offset into the | |
5422 | .rela.bss section we are going to use. */ | |
5474d94f | 5423 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
36591ba1 | 5424 | { |
5474d94f AM |
5425 | s = htab->root.sdynrelro; |
5426 | srel = htab->root.sreldynrelro; | |
5427 | } | |
5428 | else | |
5429 | { | |
5430 | s = htab->root.sdynbss; | |
9d19e4fd | 5431 | srel = htab->root.srelbss; |
5474d94f AM |
5432 | } |
5433 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
5434 | { | |
36591ba1 SL |
5435 | srel->size += sizeof (Elf32_External_Rela); |
5436 | h->needs_copy = 1; | |
5437 | } | |
5438 | ||
5439 | align2 = bfd_log2 (h->size); | |
5440 | if (align2 > h->root.u.def.section->alignment_power) | |
5441 | align2 = h->root.u.def.section->alignment_power; | |
5442 | ||
5443 | /* Align dynbss. */ | |
5444 | s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2); | |
fd361982 AM |
5445 | if (align2 > bfd_section_alignment (s) |
5446 | && !bfd_set_section_alignment (s, align2)) | |
36591ba1 SL |
5447 | return FALSE; |
5448 | ||
5449 | /* Define the symbol as being at this point in the section. */ | |
5450 | h->root.u.def.section = s; | |
5451 | h->root.u.def.value = s->size; | |
5452 | ||
5453 | /* Increment the section size to make room for the symbol. */ | |
5454 | s->size += h->size; | |
5455 | ||
5456 | return TRUE; | |
5457 | } | |
5458 | ||
5459 | /* Worker function for nios2_elf32_size_dynamic_sections. */ | |
5460 | static bfd_boolean | |
5461 | adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf) | |
5462 | { | |
5463 | struct bfd_link_info *info; | |
5464 | struct elf32_nios2_link_hash_table *htab; | |
5465 | ||
5466 | if (h->root.type == bfd_link_hash_indirect) | |
5467 | return TRUE; | |
5468 | ||
5469 | if (h->root.type == bfd_link_hash_warning) | |
5470 | /* When warning symbols are created, they **replace** the "real" | |
5471 | entry in the hash table, thus we never get to see the real | |
5472 | symbol in a hash traversal. So look at it now. */ | |
5473 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5474 | ||
5475 | info = (struct bfd_link_info *) inf; | |
5476 | htab = elf32_nios2_hash_table (info); | |
5477 | ||
5478 | if (h->plt.offset != (bfd_vma)-1) | |
5479 | h->plt.offset += htab->res_n_size; | |
5480 | if (htab->root.splt == h->root.u.def.section) | |
5481 | h->root.u.def.value += htab->res_n_size; | |
5482 | ||
5483 | return TRUE; | |
5484 | } | |
5485 | ||
5486 | /* Another worker function for nios2_elf32_size_dynamic_sections. | |
5487 | Allocate space in .plt, .got and associated reloc sections for | |
5488 | dynamic relocs. */ | |
5489 | static bfd_boolean | |
5490 | allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) | |
5491 | { | |
5492 | struct bfd_link_info *info; | |
5493 | struct elf32_nios2_link_hash_table *htab; | |
5494 | struct elf32_nios2_link_hash_entry *eh; | |
3bf083ed | 5495 | struct elf_dyn_relocs *p; |
36591ba1 SL |
5496 | int use_plt; |
5497 | ||
5498 | if (h->root.type == bfd_link_hash_indirect) | |
5499 | return TRUE; | |
5500 | ||
5501 | if (h->root.type == bfd_link_hash_warning) | |
5502 | /* When warning symbols are created, they **replace** the "real" | |
5503 | entry in the hash table, thus we never get to see the real | |
5504 | symbol in a hash traversal. So look at it now. */ | |
5505 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5506 | ||
5507 | info = (struct bfd_link_info *) inf; | |
5508 | htab = elf32_nios2_hash_table (info); | |
5509 | ||
5510 | if (htab->root.dynamic_sections_created | |
5511 | && h->plt.refcount > 0) | |
5512 | { | |
5513 | /* Make sure this symbol is output as a dynamic symbol. | |
5514 | Undefined weak syms won't yet be marked as dynamic. */ | |
5515 | if (h->dynindx == -1 | |
5516 | && !h->forced_local | |
5517 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
5518 | return FALSE; | |
5519 | ||
0e1862bb | 5520 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) |
36591ba1 SL |
5521 | { |
5522 | asection *s = htab->root.splt; | |
5523 | ||
5524 | /* Allocate room for the header. */ | |
5525 | if (s->size == 0) | |
5526 | { | |
0e1862bb | 5527 | if (bfd_link_pic (info)) |
36591ba1 SL |
5528 | s->size = 24; |
5529 | else | |
5530 | s->size = 28; | |
5531 | } | |
5532 | ||
5533 | h->plt.offset = s->size; | |
5534 | ||
5535 | /* If this symbol is not defined in a regular file, and we are | |
5536 | not generating a shared library, then set the symbol to this | |
5537 | location in the .plt. This is required to make function | |
5538 | pointers compare as equal between the normal executable and | |
5539 | the shared library. */ | |
0e1862bb | 5540 | if (! bfd_link_pic (info) |
36591ba1 SL |
5541 | && !h->def_regular) |
5542 | { | |
5543 | h->root.u.def.section = s; | |
5544 | h->root.u.def.value = h->plt.offset; | |
5545 | } | |
5546 | ||
5547 | /* Make room for this entry. */ | |
5548 | s->size += 12; | |
5549 | ||
5550 | /* We also need to make an entry in the .rela.plt section. */ | |
5551 | htab->root.srelplt->size += sizeof (Elf32_External_Rela); | |
5552 | ||
5553 | /* And the .got.plt section. */ | |
5554 | htab->root.sgotplt->size += 4; | |
5555 | } | |
5556 | else | |
5557 | { | |
5558 | h->plt.offset = (bfd_vma) -1; | |
5559 | h->needs_plt = 0; | |
5560 | } | |
5561 | } | |
5562 | else | |
5563 | { | |
5564 | h->plt.offset = (bfd_vma) -1; | |
5565 | h->needs_plt = 0; | |
5566 | } | |
5567 | ||
5568 | eh = (struct elf32_nios2_link_hash_entry *) h; | |
1c2de463 | 5569 | use_plt = (eh->got_types_used == CALL_USED |
36591ba1 SL |
5570 | && h->plt.offset != (bfd_vma) -1); |
5571 | ||
5572 | if (h->got.refcount > 0) | |
5573 | { | |
5574 | asection *s; | |
5575 | bfd_boolean dyn; | |
5576 | int tls_type = eh->tls_type; | |
5577 | int indx; | |
5578 | ||
5579 | /* Make sure this symbol is output as a dynamic symbol. | |
5580 | Undefined weak syms won't yet be marked as dynamic. */ | |
5581 | if (h->dynindx == -1 | |
5582 | && !h->forced_local | |
5583 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
5584 | return FALSE; | |
5585 | ||
5586 | s = htab->root.sgot; | |
5587 | h->got.offset = s->size; | |
5588 | ||
5589 | if (tls_type == GOT_UNKNOWN) | |
5590 | abort (); | |
5591 | ||
5592 | if (tls_type == GOT_NORMAL) | |
5593 | /* Non-TLS symbols need one GOT slot. */ | |
5594 | s->size += 4; | |
5595 | else | |
5596 | { | |
5597 | if (tls_type & GOT_TLS_GD) | |
5598 | /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */ | |
5599 | s->size += 8; | |
5600 | if (tls_type & GOT_TLS_IE) | |
5601 | /* R_NIOS2_TLS_IE16 needs one GOT slot. */ | |
5602 | s->size += 4; | |
5603 | } | |
5604 | ||
5605 | dyn = htab->root.dynamic_sections_created; | |
5606 | ||
5607 | indx = 0; | |
0e1862bb L |
5608 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
5609 | && (!bfd_link_pic (info) | |
36591ba1 SL |
5610 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
5611 | indx = h->dynindx; | |
5612 | ||
5613 | if (tls_type != GOT_NORMAL | |
0e1862bb | 5614 | && (bfd_link_pic (info) || indx != 0) |
36591ba1 SL |
5615 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
5616 | || h->root.type != bfd_link_hash_undefweak)) | |
5617 | { | |
5618 | if (tls_type & GOT_TLS_IE) | |
5619 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
5620 | ||
5621 | if (tls_type & GOT_TLS_GD) | |
5622 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
5623 | ||
5624 | if ((tls_type & GOT_TLS_GD) && indx != 0) | |
5625 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
5626 | } | |
5627 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
5628 | || h->root.type != bfd_link_hash_undefweak) | |
5629 | && !use_plt | |
0e1862bb | 5630 | && (bfd_link_pic (info) |
36591ba1 SL |
5631 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
5632 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
5633 | } | |
5634 | else | |
5635 | h->got.offset = (bfd_vma) -1; | |
5636 | ||
5637 | if (eh->dyn_relocs == NULL) | |
5638 | return TRUE; | |
5639 | ||
5640 | /* In the shared -Bsymbolic case, discard space allocated for | |
5641 | dynamic pc-relative relocs against symbols which turn out to be | |
5642 | defined in regular objects. For the normal shared case, discard | |
5643 | space for pc-relative relocs that have become local due to symbol | |
5644 | visibility changes. */ | |
5645 | ||
0e1862bb | 5646 | if (bfd_link_pic (info)) |
36591ba1 SL |
5647 | { |
5648 | if (h->def_regular | |
a496fbc8 | 5649 | && (h->forced_local || SYMBOLIC_BIND (info, h))) |
36591ba1 | 5650 | { |
3bf083ed | 5651 | struct elf_dyn_relocs **pp; |
36591ba1 SL |
5652 | |
5653 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
5654 | { | |
5655 | p->count -= p->pc_count; | |
5656 | p->pc_count = 0; | |
5657 | if (p->count == 0) | |
5658 | *pp = p->next; | |
5659 | else | |
5660 | pp = &p->next; | |
5661 | } | |
5662 | } | |
5663 | ||
5664 | /* Also discard relocs on undefined weak syms with non-default | |
5665 | visibility. */ | |
5666 | if (eh->dyn_relocs != NULL | |
5667 | && h->root.type == bfd_link_hash_undefweak) | |
5668 | { | |
31a53da5 L |
5669 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
5670 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
36591ba1 SL |
5671 | eh->dyn_relocs = NULL; |
5672 | ||
5673 | /* Make sure undefined weak symbols are output as a dynamic | |
5674 | symbol in PIEs. */ | |
5675 | else if (h->dynindx == -1 | |
5676 | && !h->forced_local | |
5677 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
5678 | return FALSE; | |
5679 | } | |
5680 | } | |
5681 | else | |
5682 | { | |
5683 | /* For the non-shared case, discard space for relocs against | |
5684 | symbols which turn out to need copy relocs or are not | |
5685 | dynamic. */ | |
5686 | ||
5687 | if (!h->non_got_ref | |
5688 | && ((h->def_dynamic && !h->def_regular) | |
5689 | || (htab->root.dynamic_sections_created | |
5690 | && (h->root.type == bfd_link_hash_undefweak | |
5691 | || h->root.type == bfd_link_hash_undefined)))) | |
5692 | { | |
5693 | /* Make sure this symbol is output as a dynamic symbol. | |
5694 | Undefined weak syms won't yet be marked as dynamic. */ | |
5695 | if (h->dynindx == -1 | |
5696 | && !h->forced_local | |
5697 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
5698 | return FALSE; | |
5699 | ||
5700 | /* If that succeeded, we know we'll be keeping all the | |
5701 | relocs. */ | |
5702 | if (h->dynindx != -1) | |
5703 | goto keep; | |
5704 | } | |
5705 | ||
5706 | eh->dyn_relocs = NULL; | |
5707 | ||
5708 | keep: ; | |
5709 | } | |
5710 | ||
5711 | /* Finally, allocate space. */ | |
5712 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
5713 | { | |
5714 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
5715 | sreloc->size += p->count * sizeof (Elf32_External_Rela); | |
5716 | } | |
5717 | ||
5718 | return TRUE; | |
5719 | } | |
5720 | ||
5721 | /* Implement elf_backend_size_dynamic_sections: | |
5722 | Set the sizes of the dynamic sections. */ | |
5723 | static bfd_boolean | |
5724 | nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5725 | struct bfd_link_info *info) | |
5726 | { | |
5727 | bfd *dynobj; | |
5728 | asection *s; | |
36591ba1 SL |
5729 | bfd_boolean relocs; |
5730 | bfd *ibfd; | |
5731 | struct elf32_nios2_link_hash_table *htab; | |
5732 | ||
5733 | htab = elf32_nios2_hash_table (info); | |
4ef97a1b | 5734 | dynobj = htab->root.dynobj; |
36591ba1 SL |
5735 | BFD_ASSERT (dynobj != NULL); |
5736 | ||
5737 | htab->res_n_size = 0; | |
4ef97a1b | 5738 | if (htab->root.dynamic_sections_created) |
36591ba1 SL |
5739 | { |
5740 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 5741 | if (bfd_link_executable (info) && !info->nointerp) |
36591ba1 SL |
5742 | { |
5743 | s = bfd_get_linker_section (dynobj, ".interp"); | |
5744 | BFD_ASSERT (s != NULL); | |
5745 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
5746 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
5747 | } | |
5748 | } | |
5749 | else | |
5750 | { | |
5751 | /* We may have created entries in the .rela.got section. | |
5752 | However, if we are not creating the dynamic sections, we will | |
5753 | not actually use these entries. Reset the size of .rela.got, | |
5754 | which will cause it to get stripped from the output file | |
5755 | below. */ | |
5756 | s = htab->root.srelgot; | |
5757 | if (s != NULL) | |
5758 | s->size = 0; | |
5759 | } | |
5760 | ||
5761 | /* Set up .got offsets for local syms, and space for local dynamic | |
5762 | relocs. */ | |
c72f2fb2 | 5763 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
36591ba1 SL |
5764 | { |
5765 | bfd_signed_vma *local_got; | |
5766 | bfd_signed_vma *end_local_got; | |
5767 | char *local_tls_type; | |
5768 | bfd_size_type locsymcount; | |
5769 | Elf_Internal_Shdr *symtab_hdr; | |
5770 | asection *srel; | |
5771 | ||
5772 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
5773 | continue; | |
5774 | ||
5775 | for (s = ibfd->sections; s != NULL; s = s->next) | |
5776 | { | |
3bf083ed | 5777 | struct elf_dyn_relocs *p; |
36591ba1 SL |
5778 | |
5779 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) | |
5780 | { | |
5781 | if (!bfd_is_abs_section (p->sec) | |
5782 | && bfd_is_abs_section (p->sec->output_section)) | |
5783 | { | |
5784 | /* Input section has been discarded, either because | |
5785 | it is a copy of a linkonce section or due to | |
5786 | linker script /DISCARD/, so we'll be discarding | |
5787 | the relocs too. */ | |
5788 | } | |
5789 | else if (p->count != 0) | |
5790 | { | |
5791 | srel = elf_section_data (p->sec)->sreloc; | |
5792 | srel->size += p->count * sizeof (Elf32_External_Rela); | |
5793 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
5794 | info->flags |= DF_TEXTREL; | |
5795 | } | |
5796 | } | |
5797 | } | |
5798 | ||
5799 | local_got = elf_local_got_refcounts (ibfd); | |
5800 | if (!local_got) | |
5801 | continue; | |
5802 | ||
5803 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
5804 | locsymcount = symtab_hdr->sh_info; | |
5805 | end_local_got = local_got + locsymcount; | |
5806 | local_tls_type = elf32_nios2_local_got_tls_type (ibfd); | |
5807 | s = htab->root.sgot; | |
5808 | srel = htab->root.srelgot; | |
5809 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) | |
5810 | { | |
5811 | if (*local_got > 0) | |
5812 | { | |
5813 | *local_got = s->size; | |
5814 | if (*local_tls_type & GOT_TLS_GD) | |
5815 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ | |
5816 | s->size += 8; | |
5817 | if (*local_tls_type & GOT_TLS_IE) | |
5818 | s->size += 4; | |
5819 | if (*local_tls_type == GOT_NORMAL) | |
5820 | s->size += 4; | |
5821 | ||
0e1862bb | 5822 | if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD) |
36591ba1 SL |
5823 | srel->size += sizeof (Elf32_External_Rela); |
5824 | } | |
5825 | else | |
5826 | *local_got = (bfd_vma) -1; | |
5827 | } | |
5828 | } | |
5829 | ||
5830 | if (htab->tls_ldm_got.refcount > 0) | |
5831 | { | |
5832 | /* Allocate two GOT entries and one dynamic relocation (if necessary) | |
5833 | for R_NIOS2_TLS_LDM16 relocations. */ | |
5834 | htab->tls_ldm_got.offset = htab->root.sgot->size; | |
5835 | htab->root.sgot->size += 8; | |
0e1862bb | 5836 | if (bfd_link_pic (info)) |
36591ba1 SL |
5837 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
5838 | } | |
5839 | else | |
5840 | htab->tls_ldm_got.offset = -1; | |
5841 | ||
5842 | /* Allocate global sym .plt and .got entries, and space for global | |
5843 | sym dynamic relocs. */ | |
5844 | elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); | |
5845 | ||
4ef97a1b | 5846 | if (htab->root.dynamic_sections_created) |
82e91538 SL |
5847 | { |
5848 | /* If the .got section is more than 0x8000 bytes, we add | |
5849 | 0x8000 to the value of _gp_got, so that 16-bit relocations | |
5850 | have a greater chance of working. */ | |
5851 | if (htab->root.sgot->size >= 0x8000 | |
4ef97a1b AM |
5852 | && htab->h_gp_got->root.u.def.value == 0) |
5853 | htab->h_gp_got->root.u.def.value = 0x8000; | |
82e91538 SL |
5854 | } |
5855 | ||
36591ba1 SL |
5856 | /* The check_relocs and adjust_dynamic_symbol entry points have |
5857 | determined the sizes of the various dynamic sections. Allocate | |
5858 | memory for them. */ | |
36591ba1 SL |
5859 | relocs = FALSE; |
5860 | for (s = dynobj->sections; s != NULL; s = s->next) | |
5861 | { | |
5862 | const char *name; | |
5863 | ||
5864 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
5865 | continue; | |
5866 | ||
5867 | /* It's OK to base decisions on the section name, because none | |
5868 | of the dynobj section names depend upon the input files. */ | |
fd361982 | 5869 | name = bfd_section_name (s); |
36591ba1 | 5870 | |
4ef97a1b | 5871 | if (CONST_STRNEQ (name, ".rela")) |
36591ba1 SL |
5872 | { |
5873 | if (s->size != 0) | |
5874 | { | |
4ef97a1b AM |
5875 | if (s != htab->root.srelplt) |
5876 | relocs = TRUE; | |
36591ba1 SL |
5877 | |
5878 | /* We use the reloc_count field as a counter if we need | |
5879 | to copy relocs into the output file. */ | |
5880 | s->reloc_count = 0; | |
5881 | } | |
5882 | } | |
4ef97a1b | 5883 | else if (s == htab->root.splt) |
5474d94f | 5884 | { |
4ef97a1b AM |
5885 | /* Correct for the number of res_N branches. */ |
5886 | if (s->size != 0 && !bfd_link_pic (info)) | |
5887 | { | |
5888 | htab->res_n_size = (s->size - 28) / 3; | |
5889 | s->size += htab->res_n_size; | |
5890 | } | |
5474d94f | 5891 | } |
4ef97a1b AM |
5892 | else if (s != htab->sbss |
5893 | && s != htab->root.sgot | |
5894 | && s != htab->root.sgotplt | |
5895 | && s != htab->root.sdynbss | |
5474d94f | 5896 | && s != htab->root.sdynrelro) |
36591ba1 SL |
5897 | /* It's not one of our sections, so don't allocate space. */ |
5898 | continue; | |
5899 | ||
5900 | if (s->size == 0) | |
5901 | { | |
36591ba1 SL |
5902 | s->flags |= SEC_EXCLUDE; |
5903 | continue; | |
5904 | } | |
5905 | ||
5906 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
5907 | continue; | |
5908 | ||
5909 | /* Allocate memory for the section contents. */ | |
36591ba1 SL |
5910 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
5911 | if (s->contents == NULL) | |
5912 | return FALSE; | |
5913 | } | |
5914 | ||
5915 | /* Adjust dynamic symbols that point to the plt to account for the | |
5916 | now-known number of resN slots. */ | |
5917 | if (htab->res_n_size) | |
5918 | elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info); | |
5919 | ||
4ef97a1b | 5920 | if (htab->root.dynamic_sections_created) |
36591ba1 SL |
5921 | { |
5922 | /* Add some entries to the .dynamic section. We fill in the | |
5923 | values later, in elf_nios2_finish_dynamic_sections, but we | |
5924 | must add the entries now so that we get the correct size for | |
5925 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
5926 | dynamic linker and used by the debugger. */ | |
5927 | #define add_dynamic_entry(TAG, VAL) \ | |
5928 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
5929 | ||
0e1862bb | 5930 | if (!bfd_link_pic (info) && !add_dynamic_entry (DT_DEBUG, 0)) |
36591ba1 SL |
5931 | return FALSE; |
5932 | ||
4ef97a1b AM |
5933 | if (htab->root.sgotplt->size != 0 |
5934 | && !add_dynamic_entry (DT_PLTGOT, 0)) | |
36591ba1 SL |
5935 | return FALSE; |
5936 | ||
4ef97a1b | 5937 | if (htab->root.splt->size != 0 |
36591ba1 SL |
5938 | && (!add_dynamic_entry (DT_PLTRELSZ, 0) |
5939 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
5940 | || !add_dynamic_entry (DT_JMPREL, 0))) | |
5941 | return FALSE; | |
5942 | ||
5943 | if (relocs | |
5944 | && (!add_dynamic_entry (DT_RELA, 0) | |
5945 | || !add_dynamic_entry (DT_RELASZ, 0) | |
5946 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))) | |
5947 | return FALSE; | |
5948 | ||
0e1862bb | 5949 | if (!bfd_link_pic (info) && !add_dynamic_entry (DT_NIOS2_GP, 0)) |
36591ba1 SL |
5950 | return FALSE; |
5951 | ||
5952 | if ((info->flags & DF_TEXTREL) != 0 | |
5953 | && !add_dynamic_entry (DT_TEXTREL, 0)) | |
5954 | return FALSE; | |
5955 | } | |
5956 | #undef add_dynamic_entry | |
5957 | ||
5958 | return TRUE; | |
5959 | } | |
5960 | ||
68faa637 AM |
5961 | /* Free the derived linker hash table. */ |
5962 | static void | |
d495ab0d | 5963 | nios2_elf32_link_hash_table_free (bfd *obfd) |
68faa637 AM |
5964 | { |
5965 | struct elf32_nios2_link_hash_table *htab | |
d495ab0d | 5966 | = (struct elf32_nios2_link_hash_table *) obfd->link.hash; |
68faa637 AM |
5967 | |
5968 | bfd_hash_table_free (&htab->bstab); | |
d495ab0d | 5969 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
5970 | } |
5971 | ||
36591ba1 SL |
5972 | /* Implement bfd_elf32_bfd_link_hash_table_create. */ |
5973 | static struct bfd_link_hash_table * | |
5974 | nios2_elf32_link_hash_table_create (bfd *abfd) | |
5975 | { | |
5976 | struct elf32_nios2_link_hash_table *ret; | |
986f0783 | 5977 | size_t amt = sizeof (struct elf32_nios2_link_hash_table); |
36591ba1 | 5978 | |
7bf52ea2 | 5979 | ret = bfd_zmalloc (amt); |
36591ba1 SL |
5980 | if (ret == NULL) |
5981 | return NULL; | |
5982 | ||
5983 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
5984 | link_hash_newfunc, | |
5985 | sizeof (struct | |
5986 | elf32_nios2_link_hash_entry), | |
5987 | NIOS2_ELF_DATA)) | |
5988 | { | |
5989 | free (ret); | |
5990 | return NULL; | |
5991 | } | |
5992 | ||
78058a5e SL |
5993 | /* Init the stub hash table too. */ |
5994 | if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc, | |
5995 | sizeof (struct elf32_nios2_stub_hash_entry))) | |
d495ab0d AM |
5996 | { |
5997 | _bfd_elf_link_hash_table_free (abfd); | |
5998 | return NULL; | |
5999 | } | |
6000 | ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free; | |
78058a5e | 6001 | |
36591ba1 SL |
6002 | return &ret->root.root; |
6003 | } | |
6004 | ||
6005 | /* Implement elf_backend_reloc_type_class. */ | |
6006 | static enum elf_reloc_type_class | |
7e612e98 AM |
6007 | nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
6008 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
6009 | const Elf_Internal_Rela *rela) | |
36591ba1 SL |
6010 | { |
6011 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
6012 | { | |
6013 | case R_NIOS2_RELATIVE: | |
6014 | return reloc_class_relative; | |
6015 | case R_NIOS2_JUMP_SLOT: | |
6016 | return reloc_class_plt; | |
6017 | case R_NIOS2_COPY: | |
6018 | return reloc_class_copy; | |
6019 | default: | |
6020 | return reloc_class_normal; | |
6021 | } | |
6022 | } | |
6023 | ||
6024 | /* Return 1 if target is one of ours. */ | |
6025 | static bfd_boolean | |
6026 | is_nios2_elf_target (const struct bfd_target *targ) | |
6027 | { | |
6d00b590 AM |
6028 | return (targ == &nios2_elf32_le_vec |
6029 | || targ == &nios2_elf32_be_vec); | |
36591ba1 SL |
6030 | } |
6031 | ||
6032 | /* Implement elf_backend_add_symbol_hook. | |
6033 | This hook is called by the linker when adding symbols from an object | |
6034 | file. We use it to put .comm items in .sbss, and not .bss. */ | |
6035 | static bfd_boolean | |
6036 | nios2_elf_add_symbol_hook (bfd *abfd, | |
6037 | struct bfd_link_info *info, | |
6038 | Elf_Internal_Sym *sym, | |
6039 | const char **namep ATTRIBUTE_UNUSED, | |
6040 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6041 | asection **secp, | |
6042 | bfd_vma *valp) | |
6043 | { | |
36591ba1 | 6044 | if (sym->st_shndx == SHN_COMMON |
0e1862bb | 6045 | && !bfd_link_relocatable (info) |
36591ba1 SL |
6046 | && sym->st_size <= elf_gp_size (abfd) |
6047 | && is_nios2_elf_target (info->output_bfd->xvec)) | |
6048 | { | |
6049 | /* Common symbols less than or equal to -G nn bytes are automatically | |
6050 | put into .sbss. */ | |
6051 | struct elf32_nios2_link_hash_table *htab; | |
6052 | ||
6053 | htab = elf32_nios2_hash_table (info); | |
6054 | if (htab->sbss == NULL) | |
6055 | { | |
6056 | flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; | |
6057 | ||
4ef97a1b AM |
6058 | if (htab->root.dynobj == NULL) |
6059 | htab->root.dynobj = abfd; | |
36591ba1 | 6060 | |
4ef97a1b AM |
6061 | htab->sbss = bfd_make_section_anyway_with_flags (htab->root.dynobj, |
6062 | ".sbss", flags); | |
36591ba1 SL |
6063 | if (htab->sbss == NULL) |
6064 | return FALSE; | |
6065 | } | |
6066 | ||
6067 | *secp = htab->sbss; | |
6068 | *valp = sym->st_size; | |
6069 | } | |
6070 | ||
6071 | return TRUE; | |
6072 | } | |
6073 | ||
6074 | /* Implement elf_backend_can_make_relative_eh_frame: | |
6075 | Decide whether to attempt to turn absptr or lsda encodings in | |
6076 | shared libraries into pcrel within the given input section. */ | |
6077 | static bfd_boolean | |
6078 | nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED, | |
6079 | struct bfd_link_info *info | |
6080 | ATTRIBUTE_UNUSED, | |
6081 | asection *eh_frame_section | |
6082 | ATTRIBUTE_UNUSED) | |
6083 | { | |
6084 | /* We can't use PC-relative encodings in the .eh_frame section. */ | |
6085 | return FALSE; | |
6086 | } | |
6087 | ||
6088 | /* Implement elf_backend_special_sections. */ | |
6089 | const struct bfd_elf_special_section elf32_nios2_special_sections[] = | |
6090 | { | |
6091 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, | |
6092 | SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, | |
6093 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, | |
6094 | SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, | |
6095 | { NULL, 0, 0, 0, 0 } | |
6096 | }; | |
6097 | ||
6098 | #define ELF_ARCH bfd_arch_nios2 | |
6099 | #define ELF_TARGET_ID NIOS2_ELF_DATA | |
6100 | #define ELF_MACHINE_CODE EM_ALTERA_NIOS2 | |
6101 | ||
6102 | /* The Nios II MMU uses a 4K page size. */ | |
6103 | ||
6104 | #define ELF_MAXPAGESIZE 0x1000 | |
6105 | ||
6106 | #define bfd_elf32_bfd_link_hash_table_create \ | |
6107 | nios2_elf32_link_hash_table_create | |
6108 | ||
965b1d80 SL |
6109 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
6110 | nios2_elf32_merge_private_bfd_data | |
6111 | ||
36591ba1 SL |
6112 | /* Relocation table lookup macros. */ |
6113 | ||
6114 | #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup | |
6115 | #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup | |
6116 | ||
6117 | /* JUMP_TABLE_LINK macros. */ | |
6118 | ||
6119 | /* elf_info_to_howto (using RELA relocations). */ | |
6120 | ||
6121 | #define elf_info_to_howto nios2_elf32_info_to_howto | |
6122 | ||
6123 | /* elf backend functions. */ | |
6124 | ||
6125 | #define elf_backend_can_gc_sections 1 | |
6126 | #define elf_backend_can_refcount 1 | |
6127 | #define elf_backend_plt_readonly 1 | |
6128 | #define elf_backend_want_got_plt 1 | |
5474d94f | 6129 | #define elf_backend_want_dynrelro 1 |
36591ba1 | 6130 | #define elf_backend_rela_normal 1 |
64f52338 | 6131 | #define elf_backend_dtrel_excludes_plt 1 |
36591ba1 SL |
6132 | |
6133 | #define elf_backend_relocate_section nios2_elf32_relocate_section | |
6134 | #define elf_backend_section_flags nios2_elf32_section_flags | |
6135 | #define elf_backend_fake_sections nios2_elf32_fake_sections | |
6136 | #define elf_backend_check_relocs nios2_elf32_check_relocs | |
6137 | ||
6138 | #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook | |
36591ba1 SL |
6139 | #define elf_backend_create_dynamic_sections \ |
6140 | nios2_elf32_create_dynamic_sections | |
6141 | #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol | |
6142 | #define elf_backend_finish_dynamic_sections \ | |
6143 | nios2_elf32_finish_dynamic_sections | |
6144 | #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol | |
6145 | #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class | |
6146 | #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections | |
6147 | #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook | |
6148 | #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol | |
965b1d80 | 6149 | #define elf_backend_object_p nios2_elf32_object_p |
36591ba1 SL |
6150 | |
6151 | #define elf_backend_grok_prstatus nios2_grok_prstatus | |
6152 | #define elf_backend_grok_psinfo nios2_grok_psinfo | |
6153 | ||
6154 | #undef elf_backend_can_make_relative_eh_frame | |
6155 | #define elf_backend_can_make_relative_eh_frame \ | |
6156 | nios2_elf32_can_make_relative_eh_frame | |
6157 | ||
6158 | #define elf_backend_special_sections elf32_nios2_special_sections | |
6159 | ||
6d00b590 | 6160 | #define TARGET_LITTLE_SYM nios2_elf32_le_vec |
36591ba1 | 6161 | #define TARGET_LITTLE_NAME "elf32-littlenios2" |
6d00b590 | 6162 | #define TARGET_BIG_SYM nios2_elf32_be_vec |
36591ba1 SL |
6163 | #define TARGET_BIG_NAME "elf32-bignios2" |
6164 | ||
6165 | #define elf_backend_got_header_size 12 | |
03d5b773 | 6166 | #define elf_backend_default_execstack 0 |
36591ba1 SL |
6167 | |
6168 | #include "elf32-target.h" |