Commit | Line | Data |
---|---|---|
36591ba1 SL |
1 | /* 32-bit ELF support for Nios II. |
2 | Copyright (C) 2012, 2013 Free Software Foundation, Inc. | |
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" | |
33 | ||
34 | /* Use RELA relocations. */ | |
35 | #ifndef USE_RELA | |
36 | #define USE_RELA | |
37 | #endif | |
38 | ||
39 | #ifdef USE_REL | |
40 | #undef USE_REL | |
41 | #endif | |
42 | ||
43 | /* Forward declarations. */ | |
44 | static bfd_reloc_status_type nios2_elf32_ignore_reloc | |
45 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
46 | static bfd_reloc_status_type nios2_elf32_hi16_relocate | |
47 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
48 | static bfd_reloc_status_type nios2_elf32_lo16_relocate | |
49 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
50 | static bfd_reloc_status_type nios2_elf32_hiadj16_relocate | |
51 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
52 | static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate | |
53 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
54 | static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate | |
55 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
56 | static bfd_reloc_status_type nios2_elf32_pcrel16_relocate | |
57 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
58 | static bfd_reloc_status_type nios2_elf32_call26_relocate | |
59 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
60 | static bfd_reloc_status_type nios2_elf32_gprel_relocate | |
61 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
62 | static bfd_reloc_status_type nios2_elf32_ujmp_relocate | |
63 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
64 | static bfd_reloc_status_type nios2_elf32_cjmp_relocate | |
65 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
66 | static bfd_reloc_status_type nios2_elf32_callr_relocate | |
67 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); | |
68 | ||
69 | /* Target vector. */ | |
70 | extern const bfd_target bfd_elf32_littlenios2_vec; | |
71 | extern const bfd_target bfd_elf32_bignios2_vec; | |
72 | ||
73 | /* Offset of tp and dtp pointers from start of TLS block. */ | |
74 | #define TP_OFFSET 0x7000 | |
75 | #define DTP_OFFSET 0x8000 | |
76 | ||
77 | /* The relocation table used for SHT_REL sections. */ | |
78 | static reloc_howto_type elf_nios2_howto_table_rel[] = { | |
79 | /* No relocation. */ | |
80 | HOWTO (R_NIOS2_NONE, /* type */ | |
81 | 0, /* rightshift */ | |
82 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
83 | 0, /* bitsize */ | |
84 | FALSE, /* pc_relative */ | |
85 | 0, /* bitpos */ | |
86 | complain_overflow_dont, /* complain_on_overflow */ | |
87 | bfd_elf_generic_reloc, /* special_function */ | |
88 | "R_NIOS2_NONE", /* name */ | |
89 | FALSE, /* partial_inplace */ | |
90 | 0, /* src_mask */ | |
91 | 0, /* dst_mask */ | |
92 | FALSE), /* pcrel_offset */ | |
93 | ||
94 | /* 16-bit signed immediate relocation. */ | |
95 | HOWTO (R_NIOS2_S16, /* type */ | |
96 | 0, /* rightshift */ | |
97 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
98 | 16, /* bitsize */ | |
99 | FALSE, /* pc_relative */ | |
100 | 6, /* bitpos */ | |
101 | complain_overflow_signed, /* complain on overflow */ | |
102 | bfd_elf_generic_reloc, /* special function */ | |
103 | "R_NIOS2_S16", /* name */ | |
104 | FALSE, /* partial_inplace */ | |
105 | 0x003fffc0, /* src_mask */ | |
106 | 0x003fffc0, /* dest_mask */ | |
107 | FALSE), /* pcrel_offset */ | |
108 | ||
109 | /* 16-bit unsigned immediate relocation. */ | |
110 | HOWTO (R_NIOS2_U16, /* type */ | |
111 | 0, /* rightshift */ | |
112 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
113 | 16, /* bitsize */ | |
114 | FALSE, /* pc_relative */ | |
115 | 6, /* bitpos */ | |
116 | complain_overflow_unsigned, /* complain on overflow */ | |
117 | bfd_elf_generic_reloc, /* special function */ | |
118 | "R_NIOS2_U16", /* name */ | |
119 | FALSE, /* partial_inplace */ | |
120 | 0x003fffc0, /* src_mask */ | |
121 | 0x003fffc0, /* dest_mask */ | |
122 | FALSE), /* pcrel_offset */ | |
123 | ||
124 | HOWTO (R_NIOS2_PCREL16, /* type */ | |
125 | 0, /* rightshift */ | |
126 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
127 | 16, /* bitsize */ | |
128 | TRUE, /* pc_relative */ | |
129 | 6, /* bitpos */ | |
130 | complain_overflow_signed, /* complain on overflow */ | |
131 | nios2_elf32_pcrel16_relocate, /* special function */ | |
132 | "R_NIOS2_PCREL16", /* name */ | |
133 | FALSE, /* partial_inplace */ | |
134 | 0x003fffc0, /* src_mask */ | |
135 | 0x003fffc0, /* dest_mask */ | |
136 | TRUE), /* pcrel_offset */ | |
137 | ||
138 | HOWTO (R_NIOS2_CALL26, /* type */ | |
139 | 2, /* rightshift */ | |
140 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
141 | 26, /* bitsize */ | |
142 | FALSE, /* pc_relative */ | |
143 | 6, /* bitpos */ | |
144 | complain_overflow_dont, /* complain on overflow */ | |
145 | nios2_elf32_call26_relocate, /* special function */ | |
146 | "R_NIOS2_CALL26", /* name */ | |
147 | FALSE, /* partial_inplace */ | |
148 | 0xffffffc0, /* src_mask */ | |
149 | 0xffffffc0, /* dst_mask */ | |
150 | FALSE), /* pcrel_offset */ | |
151 | ||
152 | HOWTO (R_NIOS2_IMM5, | |
153 | 0, | |
154 | 2, | |
155 | 5, | |
156 | FALSE, | |
157 | 6, | |
158 | complain_overflow_bitfield, | |
159 | bfd_elf_generic_reloc, | |
160 | "R_NIOS2_IMM5", | |
161 | FALSE, | |
162 | 0x000007c0, | |
163 | 0x000007c0, | |
164 | FALSE), | |
165 | ||
166 | HOWTO (R_NIOS2_CACHE_OPX, | |
167 | 0, | |
168 | 2, | |
169 | 5, | |
170 | FALSE, | |
171 | 22, | |
172 | complain_overflow_bitfield, | |
173 | bfd_elf_generic_reloc, | |
174 | "R_NIOS2_CACHE_OPX", | |
175 | FALSE, | |
176 | 0x07c00000, | |
177 | 0x07c00000, | |
178 | FALSE), | |
179 | ||
180 | HOWTO (R_NIOS2_IMM6, | |
181 | 0, | |
182 | 2, | |
183 | 6, | |
184 | FALSE, | |
185 | 6, | |
186 | complain_overflow_bitfield, | |
187 | bfd_elf_generic_reloc, | |
188 | "R_NIOS2_IMM6", | |
189 | FALSE, | |
190 | 0x00000fc0, | |
191 | 0x00000fc0, | |
192 | FALSE), | |
193 | ||
194 | HOWTO (R_NIOS2_IMM8, | |
195 | 0, | |
196 | 2, | |
197 | 8, | |
198 | FALSE, | |
199 | 6, | |
200 | complain_overflow_bitfield, | |
201 | bfd_elf_generic_reloc, | |
202 | "R_NIOS2_IMM8", | |
203 | FALSE, | |
204 | 0x00003fc0, | |
205 | 0x00003fc0, | |
206 | FALSE), | |
207 | ||
208 | HOWTO (R_NIOS2_HI16, | |
209 | 0, | |
210 | 2, | |
211 | 32, | |
212 | FALSE, | |
213 | 6, | |
214 | complain_overflow_dont, | |
215 | nios2_elf32_hi16_relocate, | |
216 | "R_NIOS2_HI16", | |
217 | FALSE, | |
218 | 0x003fffc0, | |
219 | 0x003fffc0, | |
220 | FALSE), | |
221 | ||
222 | HOWTO (R_NIOS2_LO16, | |
223 | 0, | |
224 | 2, | |
225 | 32, | |
226 | FALSE, | |
227 | 6, | |
228 | complain_overflow_dont, | |
229 | nios2_elf32_lo16_relocate, | |
230 | "R_NIOS2_LO16", | |
231 | FALSE, | |
232 | 0x003fffc0, | |
233 | 0x003fffc0, | |
234 | FALSE), | |
235 | ||
236 | HOWTO (R_NIOS2_HIADJ16, | |
237 | 0, | |
238 | 2, | |
239 | 32, | |
240 | FALSE, | |
241 | 6, | |
242 | complain_overflow_dont, | |
243 | nios2_elf32_hiadj16_relocate, | |
244 | "R_NIOS2_HIADJ16", | |
245 | FALSE, | |
246 | 0x003fffc0, | |
247 | 0x003fffc0, | |
248 | FALSE), | |
249 | ||
250 | HOWTO (R_NIOS2_BFD_RELOC_32, | |
251 | 0, | |
252 | 2, /* long */ | |
253 | 32, | |
254 | FALSE, | |
255 | 0, | |
256 | complain_overflow_dont, | |
257 | bfd_elf_generic_reloc, | |
258 | "R_NIOS2_BFD_RELOC32", | |
259 | FALSE, | |
260 | 0xffffffff, | |
261 | 0xffffffff, | |
262 | FALSE), | |
263 | ||
264 | HOWTO (R_NIOS2_BFD_RELOC_16, | |
265 | 0, | |
266 | 1, /* short */ | |
267 | 16, | |
268 | FALSE, | |
269 | 0, | |
270 | complain_overflow_bitfield, | |
271 | bfd_elf_generic_reloc, | |
272 | "R_NIOS2_BFD_RELOC16", | |
273 | FALSE, | |
274 | 0x0000ffff, | |
275 | 0x0000ffff, | |
276 | FALSE), | |
277 | ||
278 | HOWTO (R_NIOS2_BFD_RELOC_8, | |
279 | 0, | |
280 | 0, /* byte */ | |
281 | 8, | |
282 | FALSE, | |
283 | 0, | |
284 | complain_overflow_bitfield, | |
285 | bfd_elf_generic_reloc, | |
286 | "R_NIOS2_BFD_RELOC8", | |
287 | FALSE, | |
288 | 0x000000ff, | |
289 | 0x000000ff, | |
290 | FALSE), | |
291 | ||
292 | HOWTO (R_NIOS2_GPREL, | |
293 | 0, | |
294 | 2, | |
295 | 32, | |
296 | FALSE, | |
297 | 6, | |
298 | complain_overflow_dont, | |
299 | nios2_elf32_gprel_relocate, | |
300 | "R_NIOS2_GPREL", | |
301 | FALSE, | |
302 | 0x003fffc0, | |
303 | 0x003fffc0, | |
304 | FALSE), | |
305 | ||
306 | HOWTO (R_NIOS2_GNU_VTINHERIT, | |
307 | 0, | |
308 | 2, /* short */ | |
309 | 0, | |
310 | FALSE, | |
311 | 0, | |
312 | complain_overflow_dont, | |
313 | NULL, | |
314 | "R_NIOS2_GNU_VTINHERIT", | |
315 | FALSE, | |
316 | 0, | |
317 | 0, | |
318 | FALSE), | |
319 | ||
320 | HOWTO (R_NIOS2_GNU_VTENTRY, | |
321 | 0, | |
322 | 2, /* byte */ | |
323 | 0, | |
324 | FALSE, | |
325 | 0, | |
326 | complain_overflow_dont, | |
327 | _bfd_elf_rel_vtable_reloc_fn, | |
328 | "R_NIOS2_GNU_VTENTRY", | |
329 | FALSE, | |
330 | 0, | |
331 | 0, | |
332 | FALSE), | |
333 | ||
334 | HOWTO (R_NIOS2_UJMP, | |
335 | 0, | |
336 | 2, | |
337 | 32, | |
338 | FALSE, | |
339 | 6, | |
340 | complain_overflow_dont, | |
341 | nios2_elf32_ujmp_relocate, | |
342 | "R_NIOS2_UJMP", | |
343 | FALSE, | |
344 | 0x003fffc0, | |
345 | 0x003fffc0, | |
346 | FALSE), | |
347 | ||
348 | HOWTO (R_NIOS2_CJMP, | |
349 | 0, | |
350 | 2, | |
351 | 32, | |
352 | FALSE, | |
353 | 6, | |
354 | complain_overflow_dont, | |
355 | nios2_elf32_cjmp_relocate, | |
356 | "R_NIOS2_CJMP", | |
357 | FALSE, | |
358 | 0x003fffc0, | |
359 | 0x003fffc0, | |
360 | FALSE), | |
361 | ||
362 | HOWTO (R_NIOS2_CALLR, | |
363 | 0, | |
364 | 2, | |
365 | 32, | |
366 | FALSE, | |
367 | 6, | |
368 | complain_overflow_dont, | |
369 | nios2_elf32_callr_relocate, | |
370 | "R_NIOS2_CALLR", | |
371 | FALSE, | |
372 | 0x003fffc0, | |
373 | 0x003fffc0, | |
374 | FALSE), | |
375 | ||
376 | HOWTO (R_NIOS2_ALIGN, | |
377 | 0, | |
378 | 2, | |
379 | 0, | |
380 | FALSE, | |
381 | 0, | |
382 | complain_overflow_dont, | |
383 | nios2_elf32_ignore_reloc, | |
384 | "R_NIOS2_ALIGN", | |
385 | FALSE, | |
386 | 0, | |
387 | 0, | |
388 | TRUE), | |
389 | ||
390 | ||
391 | HOWTO (R_NIOS2_GOT16, | |
392 | 0, | |
393 | 2, | |
394 | 16, | |
395 | FALSE, | |
396 | 6, | |
397 | complain_overflow_bitfield, | |
398 | bfd_elf_generic_reloc, | |
399 | "R_NIOS2_GOT16", | |
400 | FALSE, | |
401 | 0x003fffc0, | |
402 | 0x003fffc0, | |
403 | FALSE), | |
404 | ||
405 | HOWTO (R_NIOS2_CALL16, | |
406 | 0, | |
407 | 2, | |
408 | 16, | |
409 | FALSE, | |
410 | 6, | |
411 | complain_overflow_bitfield, | |
412 | bfd_elf_generic_reloc, | |
413 | "R_NIOS2_CALL16", | |
414 | FALSE, | |
415 | 0x003fffc0, | |
416 | 0x003fffc0, | |
417 | FALSE), | |
418 | ||
419 | HOWTO (R_NIOS2_GOTOFF_LO, | |
420 | 0, | |
421 | 2, | |
422 | 16, | |
423 | FALSE, | |
424 | 6, | |
425 | complain_overflow_dont, | |
426 | bfd_elf_generic_reloc, | |
427 | "R_NIOS2_GOTOFF_LO", | |
428 | FALSE, | |
429 | 0x003fffc0, | |
430 | 0x003fffc0, | |
431 | FALSE), | |
432 | ||
433 | HOWTO (R_NIOS2_GOTOFF_HA, | |
434 | 0, | |
435 | 2, | |
436 | 16, | |
437 | FALSE, | |
438 | 6, | |
439 | complain_overflow_dont, | |
440 | bfd_elf_generic_reloc, | |
441 | "R_NIOS2_GOTOFF_HA", | |
442 | FALSE, | |
443 | 0x003fffc0, | |
444 | 0x003fffc0, | |
445 | FALSE), | |
446 | ||
447 | HOWTO (R_NIOS2_PCREL_LO, | |
448 | 0, | |
449 | 2, | |
450 | 16, | |
451 | TRUE, | |
452 | 6, | |
453 | complain_overflow_dont, | |
454 | nios2_elf32_pcrel_lo16_relocate, | |
455 | "R_NIOS2_PCREL_LO", | |
456 | FALSE, | |
457 | 0x003fffc0, | |
458 | 0x003fffc0, | |
459 | TRUE), | |
460 | ||
461 | HOWTO (R_NIOS2_PCREL_HA, | |
462 | 0, | |
463 | 2, | |
464 | 16, | |
465 | FALSE, /* This is a PC-relative relocation, but we need to subtract | |
466 | PC ourselves before the HIADJ. */ | |
467 | 6, | |
468 | complain_overflow_dont, | |
469 | nios2_elf32_pcrel_hiadj16_relocate, | |
470 | "R_NIOS2_PCREL_HA", | |
471 | FALSE, | |
472 | 0x003fffc0, | |
473 | 0x003fffc0, | |
474 | TRUE), | |
475 | ||
476 | HOWTO (R_NIOS2_TLS_GD16, | |
477 | 0, | |
478 | 2, | |
479 | 16, | |
480 | FALSE, | |
481 | 6, | |
482 | complain_overflow_bitfield, | |
483 | bfd_elf_generic_reloc, | |
484 | "R_NIOS2_TLS_GD16", | |
485 | FALSE, | |
486 | 0x003fffc0, | |
487 | 0x003fffc0, | |
488 | FALSE), | |
489 | ||
490 | HOWTO (R_NIOS2_TLS_LDM16, | |
491 | 0, | |
492 | 2, | |
493 | 16, | |
494 | FALSE, | |
495 | 6, | |
496 | complain_overflow_bitfield, | |
497 | bfd_elf_generic_reloc, | |
498 | "R_NIOS2_TLS_LDM16", | |
499 | FALSE, | |
500 | 0x003fffc0, | |
501 | 0x003fffc0, | |
502 | FALSE), | |
503 | ||
504 | HOWTO (R_NIOS2_TLS_LDO16, | |
505 | 0, | |
506 | 2, | |
507 | 16, | |
508 | FALSE, | |
509 | 6, | |
510 | complain_overflow_bitfield, | |
511 | bfd_elf_generic_reloc, | |
512 | "R_NIOS2_TLS_LDO16", | |
513 | FALSE, | |
514 | 0x003fffc0, | |
515 | 0x003fffc0, | |
516 | FALSE), | |
517 | ||
518 | HOWTO (R_NIOS2_TLS_IE16, | |
519 | 0, | |
520 | 2, | |
521 | 16, | |
522 | FALSE, | |
523 | 6, | |
524 | complain_overflow_bitfield, | |
525 | bfd_elf_generic_reloc, | |
526 | "R_NIOS2_TLS_IE16", | |
527 | FALSE, | |
528 | 0x003fffc0, | |
529 | 0x003fffc0, | |
530 | FALSE), | |
531 | ||
532 | HOWTO (R_NIOS2_TLS_LE16, | |
533 | 0, | |
534 | 2, | |
535 | 16, | |
536 | FALSE, | |
537 | 6, | |
538 | complain_overflow_bitfield, | |
539 | bfd_elf_generic_reloc, | |
540 | "R_NIOS2_TLS_LE16", | |
541 | FALSE, | |
542 | 0x003fffc0, | |
543 | 0x003fffc0, | |
544 | FALSE), | |
545 | ||
546 | HOWTO (R_NIOS2_TLS_DTPMOD, | |
547 | 0, | |
548 | 2, | |
549 | 32, | |
550 | FALSE, | |
551 | 0, | |
552 | complain_overflow_dont, | |
553 | bfd_elf_generic_reloc, | |
554 | "R_NIOS2_TLS_DTPMOD", | |
555 | FALSE, | |
556 | 0xffffffff, | |
557 | 0xffffffff, | |
558 | FALSE), | |
559 | ||
560 | HOWTO (R_NIOS2_TLS_DTPREL, | |
561 | 0, | |
562 | 2, | |
563 | 32, | |
564 | FALSE, | |
565 | 0, | |
566 | complain_overflow_dont, | |
567 | bfd_elf_generic_reloc, | |
568 | "R_NIOS2_TLS_DTPREL", | |
569 | FALSE, | |
570 | 0xffffffff, | |
571 | 0xffffffff, | |
572 | FALSE), | |
573 | ||
574 | HOWTO (R_NIOS2_TLS_TPREL, | |
575 | 0, | |
576 | 2, | |
577 | 32, | |
578 | FALSE, | |
579 | 0, | |
580 | complain_overflow_dont, | |
581 | bfd_elf_generic_reloc, | |
582 | "R_NIOS2_TLS_TPREL", | |
583 | FALSE, | |
584 | 0xffffffff, | |
585 | 0xffffffff, | |
586 | FALSE), | |
587 | ||
588 | HOWTO (R_NIOS2_COPY, | |
589 | 0, | |
590 | 2, | |
591 | 32, | |
592 | FALSE, | |
593 | 0, | |
594 | complain_overflow_dont, | |
595 | bfd_elf_generic_reloc, | |
596 | "R_NIOS2_COPY", | |
597 | FALSE, | |
598 | 0, | |
599 | 0, | |
600 | FALSE), | |
601 | ||
602 | HOWTO (R_NIOS2_GLOB_DAT, | |
603 | 0, | |
604 | 2, | |
605 | 32, | |
606 | FALSE, | |
607 | 0, | |
608 | complain_overflow_dont, | |
609 | bfd_elf_generic_reloc, | |
610 | "R_NIOS2_GLOB_DAT", | |
611 | FALSE, | |
612 | 0xffffffff, | |
613 | 0xffffffff, | |
614 | FALSE), | |
615 | ||
616 | HOWTO (R_NIOS2_JUMP_SLOT, | |
617 | 0, | |
618 | 2, | |
619 | 32, | |
620 | FALSE, | |
621 | 0, | |
622 | complain_overflow_dont, | |
623 | bfd_elf_generic_reloc, | |
624 | "R_NIOS2_JUMP_SLOT", | |
625 | FALSE, | |
626 | 0xffffffff, | |
627 | 0xffffffff, | |
628 | FALSE), | |
629 | ||
630 | HOWTO (R_NIOS2_RELATIVE, | |
631 | 0, | |
632 | 2, | |
633 | 32, | |
634 | FALSE, | |
635 | 0, | |
636 | complain_overflow_dont, | |
637 | bfd_elf_generic_reloc, | |
638 | "R_NIOS2_RELATIVE", | |
639 | FALSE, | |
640 | 0xffffffff, | |
641 | 0xffffffff, | |
642 | FALSE), | |
643 | ||
644 | HOWTO (R_NIOS2_GOTOFF, | |
645 | 0, | |
646 | 2, | |
647 | 32, | |
648 | FALSE, | |
649 | 0, | |
650 | complain_overflow_dont, | |
651 | bfd_elf_generic_reloc, | |
652 | "R_NIOS2_GOTOFF", | |
653 | FALSE, | |
654 | 0xffffffff, | |
655 | 0xffffffff, | |
656 | FALSE), | |
657 | ||
658 | /* Add other relocations here. */ | |
659 | }; | |
660 | ||
661 | static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1]; | |
662 | ||
663 | /* Return the howto for relocation RTYPE. */ | |
664 | static reloc_howto_type * | |
665 | lookup_howto (unsigned int rtype) | |
666 | { | |
667 | static int initialized = 0; | |
668 | int i; | |
669 | int howto_tbl_size = (int) (sizeof (elf_nios2_howto_table_rel) | |
670 | / sizeof (elf_nios2_howto_table_rel[0])); | |
671 | ||
672 | if (!initialized) | |
673 | { | |
674 | initialized = 1; | |
675 | memset (elf_code_to_howto_index, 0xff, | |
676 | sizeof (elf_code_to_howto_index)); | |
677 | for (i = 0; i < howto_tbl_size; i++) | |
678 | elf_code_to_howto_index[elf_nios2_howto_table_rel[i].type] = i; | |
679 | } | |
680 | ||
681 | BFD_ASSERT (rtype <= R_NIOS2_ILLEGAL); | |
682 | i = elf_code_to_howto_index[rtype]; | |
683 | if (i >= howto_tbl_size) | |
684 | return 0; | |
685 | return elf_nios2_howto_table_rel + i; | |
686 | } | |
687 | ||
688 | /* Map for converting BFD reloc types to Nios II reloc types. */ | |
689 | struct elf_reloc_map | |
690 | { | |
691 | bfd_reloc_code_real_type bfd_val; | |
692 | enum elf_nios2_reloc_type elf_val; | |
693 | }; | |
694 | ||
695 | static const struct elf_reloc_map nios2_reloc_map[] = { | |
696 | {BFD_RELOC_NIOS2_S16, R_NIOS2_S16}, | |
697 | {BFD_RELOC_NIOS2_U16, R_NIOS2_U16}, | |
698 | {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16}, | |
699 | {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26}, | |
700 | {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5}, | |
701 | {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX}, | |
702 | {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6}, | |
703 | {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8}, | |
704 | {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16}, | |
705 | {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16}, | |
706 | {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16}, | |
707 | {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32}, | |
708 | {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16}, | |
709 | {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8}, | |
710 | {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL}, | |
711 | {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT}, | |
712 | {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY}, | |
713 | {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP}, | |
714 | {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP}, | |
715 | {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR}, | |
716 | {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN}, | |
717 | {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16}, | |
718 | {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16}, | |
719 | {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO}, | |
720 | {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA}, | |
721 | {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO}, | |
722 | {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA}, | |
723 | {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16}, | |
724 | {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16}, | |
725 | {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16}, | |
726 | {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16}, | |
727 | {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16}, | |
728 | {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD}, | |
729 | {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL}, | |
730 | {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL}, | |
731 | {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY}, | |
732 | {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT}, | |
733 | {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT}, | |
734 | {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE}, | |
735 | {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF} | |
736 | }; | |
737 | ||
738 | /* The Nios II linker needs to keep track of the number of relocs that it | |
739 | decides to copy as dynamic relocs in check_relocs for each symbol. | |
740 | This is so that it can later discard them if they are found to be | |
741 | unnecessary. We store the information in a field extending the | |
742 | regular ELF linker hash table. */ | |
743 | ||
744 | struct elf32_nios2_dyn_relocs | |
745 | { | |
746 | struct elf32_nios2_dyn_relocs *next; | |
747 | ||
748 | /* The input section of the reloc. */ | |
749 | asection *sec; | |
750 | ||
751 | /* Total number of relocs copied for the input section. */ | |
752 | bfd_size_type count; | |
753 | ||
754 | /* Number of pc-relative relocs copied for the input section. */ | |
755 | bfd_size_type pc_count; | |
756 | }; | |
757 | ||
758 | /* Nios II ELF linker hash entry. */ | |
759 | ||
760 | struct elf32_nios2_link_hash_entry | |
761 | { | |
762 | struct elf_link_hash_entry root; | |
763 | ||
764 | /* Track dynamic relocs copied for this symbol. */ | |
765 | struct elf32_nios2_dyn_relocs *dyn_relocs; | |
766 | ||
767 | #define GOT_UNKNOWN 0 | |
768 | #define GOT_NORMAL 1 | |
769 | #define GOT_TLS_GD 2 | |
770 | #define GOT_TLS_IE 4 | |
771 | unsigned char tls_type; | |
772 | ||
773 | /* We need to detect and take special action for symbols which are only | |
774 | referenced with %call() and not with %got(). Such symbols do not need | |
775 | a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy | |
776 | linking will not work if the dynamic GOT reloc exists. | |
777 | To check for this condition efficiently, we compare got_types_used against | |
778 | CALL16_USED, meaning | |
779 | (got_types_used & (GOT16_USED | CALL16_USED)) == CALL16_USED. */ | |
780 | #define GOT16_USED 1 | |
781 | #define CALL16_USED 2 | |
782 | unsigned char got_types_used; | |
783 | }; | |
784 | ||
785 | #define elf32_nios2_hash_entry(ent) \ | |
786 | ((struct elf32_nios2_link_hash_entry *) (ent)) | |
787 | ||
788 | /* Get the Nios II elf linker hash table from a link_info structure. */ | |
789 | #define elf32_nios2_hash_table(info) \ | |
790 | ((struct elf32_nios2_link_hash_table *) ((info)->hash)) | |
791 | ||
792 | /* Nios II ELF linker hash table. */ | |
793 | struct elf32_nios2_link_hash_table | |
794 | { | |
795 | /* The main hash table. */ | |
796 | struct elf_link_hash_table root; | |
797 | ||
798 | /* Short-cuts to get to dynamic linker sections. */ | |
799 | asection *sdynbss; | |
800 | asection *srelbss; | |
801 | asection *sbss; | |
802 | ||
803 | union { | |
804 | bfd_signed_vma refcount; | |
805 | bfd_vma offset; | |
806 | } tls_ldm_got; | |
807 | ||
808 | /* Small local sym cache. */ | |
809 | struct sym_cache sym_cache; | |
810 | ||
811 | bfd_vma res_n_size; | |
812 | }; | |
813 | ||
814 | struct nios2_elf32_obj_tdata | |
815 | { | |
816 | struct elf_obj_tdata root; | |
817 | ||
818 | /* tls_type for each local got entry. */ | |
819 | char *local_got_tls_type; | |
820 | ||
821 | /* TRUE if TLS GD relocs have been seen for this object. */ | |
822 | bfd_boolean has_tlsgd; | |
823 | }; | |
824 | ||
825 | #define elf32_nios2_tdata(abfd) \ | |
826 | ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any) | |
827 | ||
828 | #define elf32_nios2_local_got_tls_type(abfd) \ | |
829 | (elf32_nios2_tdata (abfd)->local_got_tls_type) | |
830 | ||
831 | /* The name of the dynamic interpreter. This is put in the .interp | |
832 | section. */ | |
833 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
834 | ||
835 | /* PLT implementation for position-dependent code. */ | |
836 | static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */ | |
837 | 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */ | |
838 | 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */ | |
839 | 0x7800683a /* jmp r15 */ | |
840 | }; | |
841 | ||
842 | static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */ | |
843 | 0x03800034, /* movhi r14, %hiadj(res_0) */ | |
844 | 0x73800004, /* addi r14, r14, %lo(res_0) */ | |
845 | 0x7b9fc83a, /* sub r15, r15, r14 */ | |
846 | 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ | |
847 | 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ | |
848 | 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ | |
849 | 0x6800683a /* jmp r13 */ | |
850 | }; | |
851 | ||
852 | /* PLT implementation for position-independent code. */ | |
853 | static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */ | |
854 | 0x03c00034, /* movhi r15, %hiadj(index * 4) */ | |
855 | 0x7bc00004, /* addi r15, r15, %lo(index * 4) */ | |
856 | 0x00000006 /* br .PLTresolve */ | |
857 | }; | |
858 | ||
859 | static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */ | |
860 | 0x001ce03a, /* nextpc r14 */ | |
861 | 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ | |
862 | 0x6b9b883a, /* add r13, r13, r14 */ | |
863 | 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ | |
864 | 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ | |
865 | 0x6800683a /* jmp r13 */ | |
866 | }; | |
867 | ||
868 | /* Implement elf_backend_grok_prstatus: | |
869 | Support for core dump NOTE sections. */ | |
870 | static bfd_boolean | |
871 | nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
872 | { | |
873 | int offset; | |
874 | size_t size; | |
875 | ||
876 | switch (note->descsz) | |
877 | { | |
878 | default: | |
879 | return FALSE; | |
880 | ||
881 | case 212: /* Linux/Nios II */ | |
882 | /* pr_cursig */ | |
228e534f | 883 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
36591ba1 SL |
884 | |
885 | /* pr_pid */ | |
228e534f | 886 | elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); |
36591ba1 SL |
887 | |
888 | /* pr_reg */ | |
889 | offset = 72; | |
890 | size = 136; | |
891 | ||
892 | break; | |
893 | } | |
894 | ||
895 | /* Make a ".reg/999" section. */ | |
896 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
897 | size, note->descpos + offset); | |
898 | } | |
899 | ||
900 | /* Implement elf_backend_grok_psinfo. */ | |
901 | static bfd_boolean | |
902 | nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) | |
903 | { | |
904 | switch (note->descsz) | |
905 | { | |
906 | default: | |
907 | return FALSE; | |
908 | ||
909 | case 124: /* Linux/Nios II elf_prpsinfo */ | |
228e534f | 910 | elf_tdata (abfd)->core->program |
36591ba1 | 911 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 912 | elf_tdata (abfd)->core->command |
36591ba1 SL |
913 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
914 | } | |
915 | ||
916 | /* Note that for some reason, a spurious space is tacked | |
917 | onto the end of the args in some (at least one anyway) | |
918 | implementations, so strip it off if it exists. */ | |
919 | ||
920 | { | |
228e534f | 921 | char *command = elf_tdata (abfd)->core->command; |
36591ba1 SL |
922 | int n = strlen (command); |
923 | ||
924 | if (0 < n && command[n - 1] == ' ') | |
925 | command[n - 1] = '\0'; | |
926 | } | |
927 | ||
928 | return TRUE; | |
929 | } | |
930 | ||
931 | /* Create an entry in a Nios II ELF linker hash table. */ | |
932 | static struct bfd_hash_entry * | |
933 | link_hash_newfunc (struct bfd_hash_entry *entry, | |
934 | struct bfd_hash_table *table, const char *string) | |
935 | { | |
936 | /* Allocate the structure if it has not already been allocated by a | |
937 | subclass. */ | |
938 | if (entry == NULL) | |
939 | { | |
940 | entry = bfd_hash_allocate (table, | |
941 | sizeof (struct elf32_nios2_link_hash_entry)); | |
942 | if (entry == NULL) | |
943 | return entry; | |
944 | } | |
945 | ||
946 | /* Call the allocation method of the superclass. */ | |
947 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
948 | if (entry) | |
949 | { | |
950 | struct elf32_nios2_link_hash_entry *eh; | |
951 | ||
952 | eh = (struct elf32_nios2_link_hash_entry *) entry; | |
953 | eh->dyn_relocs = NULL; | |
954 | eh->tls_type = GOT_UNKNOWN; | |
955 | eh->got_types_used = 0; | |
956 | } | |
957 | ||
958 | return entry; | |
959 | } | |
960 | ||
961 | /* Implement bfd_elf32_bfd_reloc_type_lookup: | |
962 | Given a BFD reloc type, return a howto structure. */ | |
963 | static reloc_howto_type * | |
964 | nios2_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
965 | bfd_reloc_code_real_type code) | |
966 | { | |
967 | int i; | |
968 | for (i = 0; | |
969 | i < (int) (sizeof (nios2_reloc_map) / sizeof (struct elf_reloc_map)); | |
970 | ++i) | |
971 | if (nios2_reloc_map[i].bfd_val == code) | |
972 | return &elf_nios2_howto_table_rel[(int) nios2_reloc_map[i].elf_val]; | |
973 | return NULL; | |
974 | } | |
975 | ||
976 | /* Implement bfd_elf32_bfd_reloc_name_lookup: | |
977 | Given a reloc name, return a howto structure. */ | |
978 | static reloc_howto_type * | |
979 | nios2_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
980 | const char *r_name) | |
981 | { | |
982 | unsigned int i; | |
983 | for (i = 0; | |
984 | i < (sizeof (elf_nios2_howto_table_rel) | |
985 | / sizeof (elf_nios2_howto_table_rel[0])); | |
986 | i++) | |
987 | if (elf_nios2_howto_table_rel[i].name | |
988 | && strcasecmp (elf_nios2_howto_table_rel[i].name, r_name) == 0) | |
989 | return &elf_nios2_howto_table_rel[i]; | |
990 | ||
991 | return NULL; | |
992 | } | |
993 | ||
994 | /* Implement elf_info_to_howto: | |
995 | Given a ELF32 relocation, fill in a arelent structure. */ | |
996 | static void | |
997 | nios2_elf32_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, | |
998 | Elf_Internal_Rela *dst) | |
999 | { | |
1000 | unsigned int r_type; | |
1001 | ||
1002 | r_type = ELF32_R_TYPE (dst->r_info); | |
1003 | BFD_ASSERT (r_type < R_NIOS2_ILLEGAL); | |
1004 | cache_ptr->howto = &elf_nios2_howto_table_rel[r_type]; | |
1005 | } | |
1006 | ||
1007 | /* Return the base VMA address which should be subtracted from real addresses | |
1008 | when resolving @dtpoff relocation. | |
1009 | This is PT_TLS segment p_vaddr. */ | |
1010 | static bfd_vma | |
1011 | dtpoff_base (struct bfd_link_info *info) | |
1012 | { | |
1013 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1014 | if (elf_hash_table (info)->tls_sec == NULL) | |
1015 | return 0; | |
1016 | return elf_hash_table (info)->tls_sec->vma; | |
1017 | } | |
1018 | ||
1019 | /* Return the relocation value for @tpoff relocation | |
1020 | if STT_TLS virtual address is ADDRESS. */ | |
1021 | static bfd_vma | |
1022 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
1023 | { | |
1024 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
1025 | ||
1026 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1027 | if (htab->tls_sec == NULL) | |
1028 | return 0; | |
1029 | return address - htab->tls_sec->vma; | |
1030 | } | |
1031 | ||
1032 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a | |
1033 | dangerous relocation. */ | |
1034 | static bfd_boolean | |
1035 | nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info) | |
1036 | { | |
1037 | ||
1038 | bfd_boolean gp_found; | |
1039 | struct bfd_hash_entry *h; | |
1040 | struct bfd_link_hash_entry *lh; | |
1041 | ||
1042 | /* If we've already figured out what GP will be, just return it. */ | |
1043 | *pgp = _bfd_get_gp_value (output_bfd); | |
1044 | if (*pgp) | |
1045 | return TRUE; | |
1046 | ||
1047 | h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE); | |
1048 | lh = (struct bfd_link_hash_entry *) h; | |
1049 | lookup: | |
1050 | if (lh) | |
1051 | { | |
1052 | switch (lh->type) | |
1053 | { | |
1054 | case bfd_link_hash_undefined: | |
1055 | case bfd_link_hash_undefweak: | |
1056 | case bfd_link_hash_common: | |
1057 | gp_found = FALSE; | |
1058 | break; | |
1059 | case bfd_link_hash_defined: | |
1060 | case bfd_link_hash_defweak: | |
1061 | gp_found = TRUE; | |
1062 | *pgp = lh->u.def.value; | |
1063 | break; | |
1064 | case bfd_link_hash_indirect: | |
1065 | case bfd_link_hash_warning: | |
1066 | lh = lh->u.i.link; | |
1067 | /* @@FIXME ignoring warning for now */ | |
1068 | goto lookup; | |
1069 | case bfd_link_hash_new: | |
1070 | default: | |
1071 | abort (); | |
1072 | } | |
1073 | } | |
1074 | else | |
1075 | gp_found = FALSE; | |
1076 | ||
1077 | if (!gp_found) | |
1078 | { | |
1079 | /* Only get the error once. */ | |
1080 | *pgp = 4; | |
1081 | _bfd_set_gp_value (output_bfd, *pgp); | |
1082 | return FALSE; | |
1083 | } | |
1084 | ||
1085 | _bfd_set_gp_value (output_bfd, *pgp); | |
1086 | ||
1087 | return TRUE; | |
1088 | } | |
1089 | ||
1090 | /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous | |
1091 | if it's not available as we don't have a link_info pointer available here | |
1092 | to look it up in the output symbol table. We don't need to adjust the | |
1093 | symbol value for an external symbol if we are producing relocatable | |
1094 | output. */ | |
1095 | static bfd_reloc_status_type | |
1096 | nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, | |
1097 | char **error_message, bfd_vma *pgp) | |
1098 | { | |
1099 | if (bfd_is_und_section (symbol->section) && !relocatable) | |
1100 | { | |
1101 | *pgp = 0; | |
1102 | return bfd_reloc_undefined; | |
1103 | } | |
1104 | ||
1105 | *pgp = _bfd_get_gp_value (output_bfd); | |
1106 | if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
1107 | { | |
1108 | if (relocatable) | |
1109 | { | |
1110 | /* Make up a value. */ | |
1111 | *pgp = symbol->section->output_section->vma + 0x4000; | |
1112 | _bfd_set_gp_value (output_bfd, *pgp); | |
1113 | } | |
1114 | else | |
1115 | { | |
1116 | *error_message | |
1117 | = (char *) _("global pointer relative relocation when _gp not defined"); | |
1118 | return bfd_reloc_dangerous; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | return bfd_reloc_ok; | |
1123 | } | |
1124 | ||
1125 | /* The usual way of loading a 32-bit constant into a Nios II register is to | |
1126 | load the high 16 bits in one instruction and then add the low 16 bits with | |
1127 | a signed add. This means that the high halfword needs to be adjusted to | |
1128 | compensate for the sign bit of the low halfword. This function returns the | |
1129 | adjusted high halfword for a given 32-bit constant. */ | |
1130 | static | |
1131 | bfd_vma hiadj (bfd_vma symbol_value) | |
1132 | { | |
1133 | return ((symbol_value + 0x8000) >> 16) & 0xffff; | |
1134 | } | |
1135 | ||
1136 | /* Do the relocations that require special handling. */ | |
1137 | static bfd_reloc_status_type | |
1138 | nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1139 | asection *input_section, |
36591ba1 SL |
1140 | bfd_byte *data, bfd_vma offset, |
1141 | bfd_vma symbol_value, bfd_vma addend) | |
1142 | { | |
1143 | symbol_value = symbol_value + addend; | |
1144 | addend = 0; | |
1145 | symbol_value = (symbol_value >> 16) & 0xffff; | |
1146 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1147 | data, offset, symbol_value, addend); | |
1148 | } | |
1149 | ||
1150 | static bfd_reloc_status_type | |
1151 | nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1152 | asection *input_section, |
36591ba1 SL |
1153 | bfd_byte *data, bfd_vma offset, |
1154 | bfd_vma symbol_value, bfd_vma addend) | |
1155 | { | |
1156 | symbol_value = symbol_value + addend; | |
1157 | addend = 0; | |
1158 | symbol_value = symbol_value & 0xffff; | |
1159 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1160 | data, offset, symbol_value, addend); | |
1161 | } | |
1162 | ||
1163 | static bfd_reloc_status_type | |
1164 | nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1165 | asection *input_section, |
36591ba1 SL |
1166 | bfd_byte *data, bfd_vma offset, |
1167 | bfd_vma symbol_value, bfd_vma addend) | |
1168 | { | |
1169 | symbol_value = symbol_value + addend; | |
1170 | addend = 0; | |
1171 | symbol_value = hiadj(symbol_value); | |
1172 | return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, | |
1173 | symbol_value, addend); | |
1174 | } | |
1175 | ||
1176 | static bfd_reloc_status_type | |
1177 | nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1178 | asection *input_section, |
36591ba1 SL |
1179 | bfd_byte *data, bfd_vma offset, |
1180 | bfd_vma symbol_value, bfd_vma addend) | |
1181 | { | |
1182 | symbol_value = symbol_value + addend; | |
1183 | addend = 0; | |
1184 | symbol_value = symbol_value & 0xffff; | |
1185 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1186 | data, offset, symbol_value, addend); | |
1187 | } | |
1188 | ||
1189 | static bfd_reloc_status_type | |
1190 | nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1191 | asection *input_section, |
36591ba1 SL |
1192 | bfd_byte *data, bfd_vma offset, |
1193 | bfd_vma symbol_value, bfd_vma addend) | |
1194 | { | |
1195 | symbol_value = symbol_value + addend; | |
1196 | symbol_value -= (input_section->output_section->vma | |
1197 | + input_section->output_offset); | |
1198 | symbol_value -= offset; | |
1199 | addend = 0; | |
1200 | symbol_value = hiadj(symbol_value); | |
1201 | return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, | |
1202 | symbol_value, addend); | |
1203 | } | |
1204 | ||
1205 | static bfd_reloc_status_type | |
1206 | nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1207 | asection *input_section, |
36591ba1 SL |
1208 | bfd_byte *data, bfd_vma offset, |
1209 | bfd_vma symbol_value, bfd_vma addend) | |
1210 | { | |
1211 | /* NIOS2 pc relative relocations are relative to the next 32-bit instruction | |
1212 | so we need to subtract 4 before doing a final_link_relocate. */ | |
1213 | symbol_value = symbol_value + addend - 4; | |
1214 | addend = 0; | |
1215 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1216 | data, offset, symbol_value, addend); | |
1217 | } | |
1218 | ||
1219 | static bfd_reloc_status_type | |
1220 | nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1221 | asection *input_section, |
36591ba1 SL |
1222 | bfd_byte *data, bfd_vma offset, |
1223 | bfd_vma symbol_value, bfd_vma addend) | |
1224 | { | |
1225 | /* Check that the relocation is in the same page as the current address. */ | |
1226 | if (((symbol_value + addend) & 0xf0000000) | |
1227 | != ((input_section->output_section->vma + offset) & 0xf0000000)) | |
1228 | return bfd_reloc_overflow; | |
1229 | ||
1230 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1231 | data, offset, symbol_value, addend); | |
1232 | } | |
1233 | ||
1234 | static bfd_reloc_status_type | |
1235 | nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1236 | asection *input_section, |
36591ba1 SL |
1237 | bfd_byte *data, bfd_vma offset, |
1238 | bfd_vma symbol_value, bfd_vma addend) | |
1239 | { | |
1240 | /* Because we need the output_bfd, the special handling is done | |
1241 | in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */ | |
1242 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1243 | data, offset, symbol_value, addend); | |
1244 | } | |
1245 | ||
1246 | static bfd_reloc_status_type | |
1247 | nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1248 | asection *input_section, |
36591ba1 SL |
1249 | bfd_byte *data, bfd_vma offset, |
1250 | bfd_vma symbol_value, bfd_vma addend) | |
1251 | { | |
1252 | bfd_vma symbol_lo16, symbol_hi16; | |
1253 | bfd_reloc_status_type r; | |
1254 | symbol_value = symbol_value + addend; | |
1255 | addend = 0; | |
1256 | symbol_hi16 = (symbol_value >> 16) & 0xffff; | |
1257 | symbol_lo16 = symbol_value & 0xffff; | |
1258 | ||
1259 | r = _bfd_final_link_relocate (howto, abfd, input_section, | |
1260 | data, offset, symbol_hi16, addend); | |
1261 | ||
1262 | if (r == bfd_reloc_ok) | |
1263 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1264 | data, offset + 4, symbol_lo16, addend); | |
1265 | ||
1266 | return r; | |
1267 | } | |
1268 | ||
1269 | static bfd_reloc_status_type | |
1270 | nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1271 | asection *input_section, |
36591ba1 SL |
1272 | bfd_byte *data, bfd_vma offset, |
1273 | bfd_vma symbol_value, bfd_vma addend) | |
1274 | { | |
1275 | bfd_vma symbol_lo16, symbol_hi16; | |
1276 | bfd_reloc_status_type r; | |
1277 | symbol_value = symbol_value + addend; | |
1278 | addend = 0; | |
1279 | symbol_hi16 = (symbol_value >> 16) & 0xffff; | |
1280 | symbol_lo16 = symbol_value & 0xffff; | |
1281 | ||
1282 | r = _bfd_final_link_relocate (howto, abfd, input_section, | |
1283 | data, offset, symbol_hi16, addend); | |
1284 | ||
1285 | if (r == bfd_reloc_ok) | |
1286 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1287 | data, offset + 4, symbol_lo16, addend); | |
1288 | ||
1289 | return r; | |
1290 | } | |
1291 | ||
1292 | static bfd_reloc_status_type | |
1293 | nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto, | |
25153ba0 | 1294 | asection *input_section, |
36591ba1 SL |
1295 | bfd_byte *data, bfd_vma offset, |
1296 | bfd_vma symbol_value, bfd_vma addend) | |
1297 | { | |
1298 | bfd_vma symbol_lo16, symbol_hi16; | |
1299 | bfd_reloc_status_type r; | |
1300 | symbol_value = symbol_value + addend; | |
1301 | addend = 0; | |
1302 | symbol_hi16 = (symbol_value >> 16) & 0xffff; | |
1303 | symbol_lo16 = symbol_value & 0xffff; | |
1304 | ||
1305 | r = _bfd_final_link_relocate (howto, abfd, input_section, | |
1306 | data, offset, symbol_hi16, addend); | |
1307 | ||
1308 | if (r == bfd_reloc_ok) | |
1309 | return _bfd_final_link_relocate (howto, abfd, input_section, | |
1310 | data, offset + 4, symbol_lo16, addend); | |
1311 | ||
1312 | return r; | |
1313 | } | |
1314 | ||
1315 | /* HOWTO handlers for relocations that require special handling. */ | |
1316 | ||
1317 | /* This is for relocations used only when relaxing to ensure | |
1318 | changes in size of section don't screw up .align. */ | |
1319 | static bfd_reloc_status_type | |
1320 | nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, | |
1321 | asymbol *symbol ATTRIBUTE_UNUSED, | |
1322 | void *data ATTRIBUTE_UNUSED, asection *input_section, | |
1323 | bfd *output_bfd, | |
1324 | char **error_message ATTRIBUTE_UNUSED) | |
1325 | { | |
1326 | if (output_bfd != NULL) | |
1327 | reloc_entry->address += input_section->output_offset; | |
1328 | return bfd_reloc_ok; | |
1329 | } | |
1330 | ||
1331 | static bfd_reloc_status_type | |
1332 | nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1333 | void *data, asection *input_section, | |
1334 | bfd *output_bfd, | |
1335 | char **error_message ATTRIBUTE_UNUSED) | |
1336 | { | |
1337 | /* This part is from bfd_elf_generic_reloc. */ | |
1338 | if (output_bfd != NULL | |
1339 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1340 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1341 | { | |
1342 | reloc_entry->address += input_section->output_offset; | |
1343 | return bfd_reloc_ok; | |
1344 | } | |
1345 | ||
1346 | if (output_bfd != NULL) | |
1347 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1348 | return bfd_reloc_continue; | |
1349 | ||
1350 | return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto, | |
1351 | input_section, | |
1352 | data, reloc_entry->address, | |
1353 | (symbol->value | |
1354 | + symbol->section->output_section->vma | |
1355 | + symbol->section->output_offset), | |
1356 | reloc_entry->addend); | |
1357 | } | |
1358 | ||
1359 | static bfd_reloc_status_type | |
1360 | nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1361 | void *data, asection *input_section, | |
1362 | bfd *output_bfd, | |
1363 | char **error_message ATTRIBUTE_UNUSED) | |
1364 | { | |
1365 | /* This part is from bfd_elf_generic_reloc. */ | |
1366 | if (output_bfd != NULL | |
1367 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1368 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1369 | { | |
1370 | reloc_entry->address += input_section->output_offset; | |
1371 | return bfd_reloc_ok; | |
1372 | } | |
1373 | ||
1374 | if (output_bfd != NULL) | |
1375 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1376 | return bfd_reloc_continue; | |
1377 | ||
1378 | return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto, | |
1379 | input_section, | |
1380 | data, reloc_entry->address, | |
1381 | (symbol->value | |
1382 | + symbol->section->output_section->vma | |
1383 | + symbol->section->output_offset), | |
1384 | reloc_entry->addend); | |
1385 | } | |
1386 | ||
1387 | static bfd_reloc_status_type | |
1388 | nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1389 | void *data, asection *input_section, | |
1390 | bfd *output_bfd, | |
1391 | char **error_message ATTRIBUTE_UNUSED) | |
1392 | { | |
1393 | /* This part is from bfd_elf_generic_reloc. */ | |
1394 | if (output_bfd != NULL | |
1395 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1396 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1397 | { | |
1398 | reloc_entry->address += input_section->output_offset; | |
1399 | return bfd_reloc_ok; | |
1400 | } | |
1401 | ||
1402 | if (output_bfd != NULL) | |
1403 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1404 | return bfd_reloc_continue; | |
1405 | ||
1406 | return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto, | |
1407 | input_section, | |
1408 | data, reloc_entry->address, | |
1409 | (symbol->value | |
1410 | + symbol->section->output_section->vma | |
1411 | + symbol->section->output_offset), | |
1412 | reloc_entry->addend); | |
1413 | } | |
1414 | ||
1415 | static bfd_reloc_status_type | |
1416 | nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry, | |
1417 | asymbol *symbol, void *data, | |
1418 | asection *input_section, bfd *output_bfd, | |
1419 | char **error_message ATTRIBUTE_UNUSED) | |
1420 | { | |
1421 | /* This part is from bfd_elf_generic_reloc. */ | |
1422 | if (output_bfd != NULL | |
1423 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1424 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1425 | { | |
1426 | reloc_entry->address += input_section->output_offset; | |
1427 | return bfd_reloc_ok; | |
1428 | } | |
1429 | ||
1430 | if (output_bfd != NULL) | |
1431 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1432 | return bfd_reloc_continue; | |
1433 | ||
1434 | return nios2_elf32_do_pcrel_lo16_relocate ( | |
1435 | abfd, reloc_entry->howto, input_section, data, reloc_entry->address, | |
1436 | (symbol->value + symbol->section->output_section->vma | |
1437 | + symbol->section->output_offset), | |
1438 | reloc_entry->addend); | |
1439 | } | |
1440 | ||
1441 | static bfd_reloc_status_type | |
1442 | nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, | |
1443 | asymbol *symbol, void *data, | |
1444 | asection *input_section, bfd *output_bfd, | |
1445 | char **error_message ATTRIBUTE_UNUSED) | |
1446 | { | |
1447 | /* This part is from bfd_elf_generic_reloc. */ | |
1448 | if (output_bfd != NULL | |
1449 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1450 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1451 | { | |
1452 | reloc_entry->address += input_section->output_offset; | |
1453 | return bfd_reloc_ok; | |
1454 | } | |
1455 | ||
1456 | if (output_bfd != NULL) | |
1457 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1458 | return bfd_reloc_continue; | |
1459 | ||
1460 | return nios2_elf32_do_pcrel_hiadj16_relocate ( | |
1461 | abfd, reloc_entry->howto, input_section, data, reloc_entry->address, | |
1462 | (symbol->value + symbol->section->output_section->vma | |
1463 | + symbol->section->output_offset), | |
1464 | reloc_entry->addend); | |
1465 | } | |
1466 | ||
1467 | static bfd_reloc_status_type | |
1468 | nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1469 | void *data, asection *input_section, | |
1470 | bfd *output_bfd, | |
1471 | char **error_message ATTRIBUTE_UNUSED) | |
1472 | { | |
1473 | /* This part is from bfd_elf_generic_reloc. */ | |
1474 | if (output_bfd != NULL | |
1475 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1476 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1477 | { | |
1478 | reloc_entry->address += input_section->output_offset; | |
1479 | return bfd_reloc_ok; | |
1480 | } | |
1481 | ||
1482 | if (output_bfd != NULL) | |
1483 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1484 | return bfd_reloc_continue; | |
1485 | ||
1486 | return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto, | |
1487 | input_section, | |
1488 | data, reloc_entry->address, | |
1489 | (symbol->value | |
1490 | + symbol->section->output_section->vma | |
1491 | + symbol->section->output_offset), | |
1492 | reloc_entry->addend); | |
1493 | } | |
1494 | ||
1495 | static bfd_reloc_status_type | |
1496 | nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1497 | void *data, asection *input_section, | |
1498 | bfd *output_bfd, | |
1499 | char **error_message ATTRIBUTE_UNUSED) | |
1500 | { | |
1501 | /* This part is from bfd_elf_generic_reloc. */ | |
1502 | if (output_bfd != NULL | |
1503 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1504 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1505 | { | |
1506 | reloc_entry->address += input_section->output_offset; | |
1507 | return bfd_reloc_ok; | |
1508 | } | |
1509 | ||
1510 | if (output_bfd != NULL) | |
1511 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1512 | return bfd_reloc_continue; | |
1513 | ||
1514 | return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto, | |
1515 | input_section, | |
1516 | data, reloc_entry->address, | |
1517 | (symbol->value | |
1518 | + symbol->section->output_section->vma | |
1519 | + symbol->section->output_offset), | |
1520 | reloc_entry->addend); | |
1521 | } | |
1522 | ||
1523 | static bfd_reloc_status_type | |
1524 | nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1525 | void *data, asection *input_section, | |
1526 | bfd *output_bfd, char **msg) | |
1527 | { | |
1528 | bfd_vma relocation; | |
1529 | bfd_vma gp; | |
1530 | bfd_reloc_status_type r; | |
1531 | ||
1532 | ||
1533 | /* This part is from bfd_elf_generic_reloc. */ | |
1534 | if (output_bfd != NULL | |
1535 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1536 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1537 | { | |
1538 | reloc_entry->address += input_section->output_offset; | |
1539 | return bfd_reloc_ok; | |
1540 | } | |
1541 | ||
1542 | if (output_bfd != NULL) | |
1543 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1544 | return bfd_reloc_continue; | |
1545 | ||
1546 | relocation = (symbol->value | |
1547 | + symbol->section->output_section->vma | |
1548 | + symbol->section->output_offset); | |
1549 | ||
1550 | /* This assumes we've already cached the _gp symbol. */ | |
1551 | r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp); | |
1552 | if (r == bfd_reloc_ok) | |
1553 | { | |
1554 | relocation = relocation + reloc_entry->addend - gp; | |
1555 | reloc_entry->addend = 0; | |
1556 | if ((signed) relocation < -32768 || (signed) relocation > 32767) | |
1557 | { | |
1558 | *msg = _("global pointer relative address out of range"); | |
1559 | r = bfd_reloc_outofrange; | |
1560 | } | |
1561 | else | |
1562 | r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto, | |
1563 | input_section, | |
1564 | data, reloc_entry->address, | |
1565 | relocation, reloc_entry->addend); | |
1566 | } | |
1567 | ||
1568 | return r; | |
1569 | } | |
1570 | ||
1571 | static bfd_reloc_status_type | |
1572 | nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1573 | void *data, asection *input_section, | |
1574 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) | |
1575 | { | |
1576 | /* This part is from bfd_elf_generic_reloc. */ | |
1577 | if (output_bfd != NULL | |
1578 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1579 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1580 | { | |
1581 | reloc_entry->address += input_section->output_offset; | |
1582 | return bfd_reloc_ok; | |
1583 | } | |
1584 | ||
1585 | if (output_bfd != NULL) | |
1586 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1587 | return bfd_reloc_continue; | |
1588 | ||
1589 | return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto, | |
1590 | input_section, | |
1591 | data, reloc_entry->address, | |
1592 | (symbol->value | |
1593 | + symbol->section->output_section->vma | |
1594 | + symbol->section->output_offset), | |
1595 | reloc_entry->addend); | |
1596 | } | |
1597 | ||
1598 | static bfd_reloc_status_type | |
1599 | nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1600 | void *data, asection *input_section, | |
1601 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) | |
1602 | { | |
1603 | /* This part is from bfd_elf_generic_reloc. */ | |
1604 | if (output_bfd != NULL | |
1605 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1606 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1607 | { | |
1608 | reloc_entry->address += input_section->output_offset; | |
1609 | return bfd_reloc_ok; | |
1610 | } | |
1611 | ||
1612 | if (output_bfd != NULL) | |
1613 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1614 | return bfd_reloc_continue; | |
1615 | ||
1616 | return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto, | |
1617 | input_section, | |
1618 | data, reloc_entry->address, | |
1619 | (symbol->value | |
1620 | + symbol->section->output_section->vma | |
1621 | + symbol->section->output_offset), | |
1622 | reloc_entry->addend); | |
1623 | } | |
1624 | ||
1625 | static bfd_reloc_status_type | |
1626 | nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
1627 | void *data, asection *input_section, | |
1628 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) | |
1629 | { | |
1630 | /* This part is from bfd_elf_generic_reloc. */ | |
1631 | if (output_bfd != NULL | |
1632 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1633 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) | |
1634 | { | |
1635 | reloc_entry->address += input_section->output_offset; | |
1636 | return bfd_reloc_ok; | |
1637 | } | |
1638 | ||
1639 | if (output_bfd != NULL) | |
1640 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
1641 | return bfd_reloc_continue; | |
1642 | ||
1643 | return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto, | |
1644 | input_section, | |
1645 | data, reloc_entry->address, | |
1646 | (symbol->value | |
1647 | + symbol->section->output_section->vma | |
1648 | + symbol->section->output_offset), | |
1649 | reloc_entry->addend); | |
1650 | } | |
1651 | ||
1652 | ||
1653 | /* Implement elf_backend_relocate_section. */ | |
1654 | static bfd_boolean | |
1655 | nios2_elf32_relocate_section (bfd *output_bfd, | |
1656 | struct bfd_link_info *info, | |
1657 | bfd *input_bfd, | |
1658 | asection *input_section, | |
1659 | bfd_byte *contents, | |
1660 | Elf_Internal_Rela *relocs, | |
1661 | Elf_Internal_Sym *local_syms, | |
1662 | asection **local_sections) | |
1663 | { | |
1664 | Elf_Internal_Shdr *symtab_hdr; | |
1665 | struct elf_link_hash_entry **sym_hashes; | |
1666 | Elf_Internal_Rela *rel; | |
1667 | Elf_Internal_Rela *relend; | |
1668 | struct elf32_nios2_link_hash_table *htab; | |
1669 | asection *sgot; | |
1670 | asection *splt; | |
1671 | asection *sreloc = NULL; | |
1672 | bfd_vma *local_got_offsets; | |
1673 | ||
1674 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1675 | sym_hashes = elf_sym_hashes (input_bfd); | |
1676 | relend = relocs + input_section->reloc_count; | |
1677 | ||
1678 | htab = elf32_nios2_hash_table (info); | |
1679 | sgot = htab->root.sgot; | |
1680 | splt = htab->root.splt; | |
1681 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1682 | ||
1683 | for (rel = relocs; rel < relend; rel++) | |
1684 | { | |
1685 | reloc_howto_type *howto; | |
1686 | unsigned long r_symndx; | |
1687 | Elf_Internal_Sym *sym; | |
1688 | asection *sec; | |
1689 | struct elf_link_hash_entry *h; | |
1690 | struct elf32_nios2_link_hash_entry *eh; | |
1691 | bfd_vma relocation; | |
1692 | bfd_vma gp; | |
1693 | bfd_vma reloc_address; | |
1694 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1695 | const char *name = NULL; | |
1696 | int r_type; | |
1697 | const char *format; | |
1698 | char msgbuf[256]; | |
1699 | const char* msg = (const char*) NULL; | |
1700 | bfd_boolean unresolved_reloc; | |
1701 | bfd_vma off; | |
1702 | int use_plt; | |
1703 | ||
1704 | r_type = ELF32_R_TYPE (rel->r_info); | |
1705 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1706 | ||
1707 | howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info)); | |
1708 | h = NULL; | |
1709 | sym = NULL; | |
1710 | sec = NULL; | |
1711 | ||
1712 | if (r_symndx < symtab_hdr->sh_info) | |
1713 | { | |
1714 | sym = local_syms + r_symndx; | |
1715 | sec = local_sections[r_symndx]; | |
1716 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1717 | } | |
1718 | else | |
1719 | { | |
62d887d4 | 1720 | bfd_boolean warned, ignored; |
36591ba1 SL |
1721 | |
1722 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1723 | r_symndx, symtab_hdr, sym_hashes, | |
1724 | h, sec, relocation, | |
62d887d4 | 1725 | unresolved_reloc, warned, ignored); |
36591ba1 SL |
1726 | } |
1727 | ||
1728 | if (sec && discarded_section (sec)) | |
1729 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
1730 | rel, 1, relend, howto, 0, contents); | |
1731 | ||
1732 | /* Nothing more to do unless this is a final link. */ | |
1733 | if (info->relocatable) | |
1734 | continue; | |
1735 | ||
1736 | if (sec && sec->output_section) | |
1737 | reloc_address = (sec->output_section->vma + sec->output_offset | |
1738 | + rel->r_offset); | |
1739 | else | |
1740 | reloc_address = 0; | |
1741 | ||
1742 | if (howto) | |
1743 | { | |
1744 | switch (howto->type) | |
1745 | { | |
1746 | case R_NIOS2_HI16: | |
1747 | r = nios2_elf32_do_hi16_relocate (input_bfd, howto, | |
1748 | input_section, | |
1749 | contents, rel->r_offset, | |
1750 | relocation, rel->r_addend); | |
1751 | break; | |
1752 | case R_NIOS2_LO16: | |
1753 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, | |
1754 | input_section, | |
1755 | contents, rel->r_offset, | |
1756 | relocation, rel->r_addend); | |
1757 | break; | |
1758 | case R_NIOS2_PCREL_LO: | |
1759 | r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto, | |
1760 | input_section, | |
1761 | contents, | |
1762 | rel->r_offset, | |
1763 | relocation, | |
1764 | rel->r_addend); | |
1765 | break; | |
1766 | case R_NIOS2_HIADJ16: | |
1767 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, | |
1768 | input_section, contents, | |
1769 | rel->r_offset, relocation, | |
1770 | rel->r_addend); | |
1771 | break; | |
1772 | case R_NIOS2_PCREL_HA: | |
1773 | r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto, | |
1774 | input_section, | |
1775 | contents, | |
1776 | rel->r_offset, | |
1777 | relocation, | |
1778 | rel->r_addend); | |
1779 | break; | |
1780 | case R_NIOS2_PCREL16: | |
1781 | r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto, | |
1782 | input_section, contents, | |
1783 | rel->r_offset, relocation, | |
1784 | rel->r_addend); | |
1785 | break; | |
1786 | case R_NIOS2_GPREL: | |
1787 | /* Turns an absolute address into a gp-relative address. */ | |
1788 | if (!nios2_elf_assign_gp (output_bfd, &gp, info)) | |
1789 | { | |
1790 | format = _("global pointer relative relocation at address " | |
1791 | "0x%08x when _gp not defined\n"); | |
1792 | sprintf (msgbuf, format, reloc_address); | |
1793 | msg = msgbuf; | |
1794 | r = bfd_reloc_dangerous; | |
1795 | } | |
1796 | else | |
1797 | { | |
1798 | bfd_vma symbol_address = rel->r_addend + relocation; | |
1799 | relocation = relocation + rel->r_addend - gp; | |
1800 | rel->r_addend = 0; | |
1801 | if (((signed) relocation < -32768 | |
1802 | || (signed) relocation > 32767) | |
1803 | && (!h | |
1804 | || h->root.type == bfd_link_hash_defined | |
1805 | || h->root.type == bfd_link_hash_defweak)) | |
1806 | { | |
1807 | format = _("Unable to reach %s (at 0x%08x) from the " | |
1808 | "global pointer (at 0x%08x) because the " | |
1809 | "offset (%d) is out of the allowed range, " | |
1810 | "-32678 to 32767.\n" ); | |
1811 | sprintf (msgbuf, format, name, symbol_address, gp, | |
1812 | (signed)relocation); | |
1813 | msg = msgbuf; | |
1814 | r = bfd_reloc_outofrange; | |
1815 | } | |
1816 | else | |
1817 | r = _bfd_final_link_relocate (howto, input_bfd, | |
1818 | input_section, contents, | |
1819 | rel->r_offset, relocation, | |
1820 | rel->r_addend); | |
1821 | } | |
1822 | ||
1823 | break; | |
1824 | case R_NIOS2_UJMP: | |
1825 | r = nios2_elf32_do_ujmp_relocate (input_bfd, howto, | |
1826 | input_section, | |
1827 | contents, rel->r_offset, | |
1828 | relocation, rel->r_addend); | |
1829 | break; | |
1830 | case R_NIOS2_CJMP: | |
1831 | r = nios2_elf32_do_cjmp_relocate (input_bfd, howto, | |
1832 | input_section, | |
1833 | contents, rel->r_offset, | |
1834 | relocation, rel->r_addend); | |
1835 | break; | |
1836 | case R_NIOS2_CALLR: | |
1837 | r = nios2_elf32_do_callr_relocate (input_bfd, howto, | |
1838 | input_section, contents, | |
1839 | rel->r_offset, relocation, | |
1840 | rel->r_addend); | |
1841 | break; | |
1842 | case R_NIOS2_CALL26: | |
1843 | /* If we have a call to an undefined weak symbol, we just want | |
1844 | to stuff a zero in the bits of the call instruction and | |
1845 | bypass the normal call26 relocation handling, because it'll | |
1846 | diagnose an overflow error if address 0 isn't in the same | |
1847 | 256MB segment as the call site. Presumably the call | |
1848 | should be guarded by a null check anyway. */ | |
1849 | if (h != NULL && h->root.type == bfd_link_hash_undefweak) | |
1850 | { | |
1851 | BFD_ASSERT (relocation == 0 && rel->r_addend == 0); | |
1852 | r = _bfd_final_link_relocate (howto, input_bfd, | |
1853 | input_section, contents, | |
1854 | rel->r_offset, relocation, | |
1855 | rel->r_addend); | |
1856 | break; | |
1857 | } | |
1858 | /* Handle relocations which should use the PLT entry. | |
1859 | NIOS2_BFD_RELOC_32 relocations will use the symbol's value, | |
1860 | which may point to a PLT entry, but we don't need to handle | |
1861 | that here. If we created a PLT entry, all branches in this | |
1862 | object should go to it. */ | |
1863 | if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) | |
1864 | { | |
1865 | /* If we've created a .plt section, and assigned a PLT entry | |
1866 | to this function, it should not be known to bind locally. | |
1867 | If it were, we would have cleared the PLT entry. */ | |
1868 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); | |
1869 | ||
1870 | relocation = (splt->output_section->vma | |
1871 | + splt->output_offset | |
1872 | + h->plt.offset); | |
1873 | ||
1874 | unresolved_reloc = FALSE; | |
1875 | } | |
1876 | r = nios2_elf32_do_call26_relocate (input_bfd, howto, | |
1877 | input_section, contents, | |
1878 | rel->r_offset, relocation, | |
1879 | rel->r_addend); | |
1880 | break; | |
1881 | case R_NIOS2_ALIGN: | |
1882 | r = bfd_reloc_ok; | |
1883 | /* For symmetry this would be | |
1884 | r = nios2_elf32_do_ignore_reloc (input_bfd, howto, | |
1885 | input_section, contents, | |
1886 | rel->r_offset, relocation, | |
1887 | rel->r_addend); | |
1888 | but do_ignore_reloc would do no more than return | |
1889 | bfd_reloc_ok. */ | |
1890 | break; | |
1891 | ||
1892 | case R_NIOS2_GOT16: | |
1893 | case R_NIOS2_CALL16: | |
1894 | /* Relocation is to the entry for this symbol in the | |
1895 | global offset table. */ | |
1896 | if (sgot == NULL) | |
1897 | { | |
1898 | r = bfd_reloc_notsupported; | |
1899 | break; | |
1900 | } | |
1901 | ||
1902 | use_plt = 0; | |
1903 | ||
1904 | if (h != NULL) | |
1905 | { | |
1906 | bfd_boolean dyn; | |
1907 | ||
1908 | eh = (struct elf32_nios2_link_hash_entry *)h; | |
1909 | use_plt = (eh->got_types_used == CALL16_USED | |
1910 | && h->plt.offset != (bfd_vma) -1); | |
1911 | ||
1912 | off = h->got.offset; | |
1913 | BFD_ASSERT (off != (bfd_vma) -1); | |
1914 | dyn = elf_hash_table (info)->dynamic_sections_created; | |
1915 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
1916 | || (info->shared | |
1917 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
1918 | || (ELF_ST_VISIBILITY (h->other) | |
1919 | && h->root.type == bfd_link_hash_undefweak)) | |
1920 | { | |
1921 | /* This is actually a static link, or it is a -Bsymbolic | |
1922 | link and the symbol is defined locally. We must | |
1923 | initialize this entry in the global offset table. | |
1924 | Since the offset must always be a multiple of 4, we | |
1925 | use the least significant bit to record whether we | |
1926 | have initialized it already. | |
1927 | ||
1928 | When doing a dynamic link, we create a .rela.got | |
1929 | relocation entry to initialize the value. This is | |
1930 | done in the finish_dynamic_symbol routine. */ | |
1931 | if ((off & 1) != 0) | |
1932 | off &= ~1; | |
1933 | else | |
1934 | { | |
1935 | bfd_put_32 (output_bfd, relocation, | |
1936 | sgot->contents + off); | |
1937 | h->got.offset |= 1; | |
1938 | } | |
1939 | } | |
1940 | else | |
1941 | unresolved_reloc = FALSE; | |
1942 | } | |
1943 | else | |
1944 | { | |
1945 | BFD_ASSERT (local_got_offsets != NULL | |
1946 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1947 | ||
1948 | off = local_got_offsets[r_symndx]; | |
1949 | ||
1950 | /* The offset must always be a multiple of 4. We use the | |
1951 | least significant bit to record whether we have already | |
1952 | generated the necessary reloc. */ | |
1953 | if ((off & 1) != 0) | |
1954 | off &= ~1; | |
1955 | else | |
1956 | { | |
1957 | bfd_put_32 (output_bfd, relocation, | |
1958 | sgot->contents + off); | |
1959 | ||
1960 | if (info->shared) | |
1961 | { | |
1962 | asection *srelgot; | |
1963 | Elf_Internal_Rela outrel; | |
1964 | bfd_byte *loc; | |
1965 | ||
1966 | srelgot = htab->root.srelgot; | |
1967 | BFD_ASSERT (srelgot != NULL); | |
1968 | ||
1969 | outrel.r_addend = relocation; | |
1970 | outrel.r_offset = (sgot->output_section->vma | |
1971 | + sgot->output_offset | |
1972 | + off); | |
1973 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); | |
1974 | loc = srelgot->contents; | |
1975 | loc += (srelgot->reloc_count++ * | |
1976 | sizeof (Elf32_External_Rela)); | |
1977 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1978 | } | |
1979 | ||
1980 | local_got_offsets[r_symndx] |= 1; | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | if (use_plt && info->shared) | |
1985 | { | |
1986 | off = ((h->plt.offset - 24) / 12 + 3) * 4; | |
1987 | relocation = htab->root.sgotplt->output_offset + off; | |
1988 | } | |
1989 | else | |
1990 | relocation = sgot->output_offset + off; | |
1991 | ||
1992 | /* This relocation does not use the addend. */ | |
1993 | rel->r_addend = 0; | |
1994 | ||
1995 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1996 | contents, rel->r_offset, | |
1997 | relocation, rel->r_addend); | |
1998 | break; | |
1999 | ||
2000 | case R_NIOS2_GOTOFF_LO: | |
2001 | case R_NIOS2_GOTOFF_HA: | |
2002 | case R_NIOS2_GOTOFF: | |
2003 | /* Relocation is relative to the start of the | |
2004 | global offset table. */ | |
2005 | ||
2006 | BFD_ASSERT (sgot != NULL); | |
2007 | if (sgot == NULL) | |
2008 | { | |
2009 | r = bfd_reloc_notsupported; | |
2010 | break; | |
2011 | } | |
2012 | ||
2013 | /* Note that sgot->output_offset is not involved in this | |
2014 | calculation. We always want the start of .got. If we | |
2015 | define _GLOBAL_OFFSET_TABLE in a different way, as is | |
2016 | permitted by the ABI, we might have to change this | |
2017 | calculation. */ | |
2018 | relocation -= sgot->output_section->vma; | |
2019 | switch (howto->type) | |
2020 | { | |
2021 | case R_NIOS2_GOTOFF_LO: | |
2022 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, | |
2023 | input_section, contents, | |
2024 | rel->r_offset, relocation, | |
2025 | rel->r_addend); | |
2026 | break; | |
2027 | case R_NIOS2_GOTOFF_HA: | |
2028 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, | |
2029 | input_section, contents, | |
2030 | rel->r_offset, | |
2031 | relocation, | |
2032 | rel->r_addend); | |
2033 | break; | |
2034 | default: | |
2035 | r = _bfd_final_link_relocate (howto, input_bfd, | |
2036 | input_section, contents, | |
2037 | rel->r_offset, relocation, | |
2038 | rel->r_addend); | |
2039 | break; | |
2040 | } | |
2041 | break; | |
2042 | ||
2043 | case R_NIOS2_TLS_LDO16: | |
2044 | relocation -= dtpoff_base (info) + DTP_OFFSET; | |
2045 | ||
2046 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2047 | contents, rel->r_offset, | |
2048 | relocation, rel->r_addend); | |
2049 | break; | |
2050 | case R_NIOS2_TLS_LDM16: | |
2051 | if (htab->root.sgot == NULL) | |
2052 | abort (); | |
2053 | ||
2054 | off = htab->tls_ldm_got.offset; | |
2055 | ||
2056 | if ((off & 1) != 0) | |
2057 | off &= ~1; | |
2058 | else | |
2059 | { | |
2060 | /* If we don't know the module number, create a relocation | |
2061 | for it. */ | |
2062 | if (info->shared) | |
2063 | { | |
2064 | Elf_Internal_Rela outrel; | |
2065 | bfd_byte *loc; | |
2066 | ||
2067 | if (htab->root.srelgot == NULL) | |
2068 | abort (); | |
2069 | ||
2070 | outrel.r_addend = 0; | |
2071 | outrel.r_offset = (htab->root.sgot->output_section->vma | |
2072 | + htab->root.sgot->output_offset | |
2073 | + off); | |
2074 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD); | |
2075 | ||
2076 | loc = htab->root.srelgot->contents; | |
2077 | loc += (htab->root.srelgot->reloc_count++ | |
2078 | * sizeof (Elf32_External_Rela)); | |
2079 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2080 | } | |
2081 | else | |
2082 | bfd_put_32 (output_bfd, 1, | |
2083 | htab->root.sgot->contents + off); | |
2084 | ||
2085 | htab->tls_ldm_got.offset |= 1; | |
2086 | } | |
2087 | ||
2088 | relocation = (htab->root.sgot->output_offset + off); | |
2089 | ||
2090 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2091 | contents, rel->r_offset, | |
2092 | relocation, rel->r_addend); | |
2093 | ||
2094 | break; | |
2095 | case R_NIOS2_TLS_GD16: | |
2096 | case R_NIOS2_TLS_IE16: | |
2097 | { | |
2098 | int indx; | |
2099 | char tls_type; | |
2100 | ||
2101 | if (htab->root.sgot == NULL) | |
2102 | abort (); | |
2103 | ||
2104 | indx = 0; | |
2105 | if (h != NULL) | |
2106 | { | |
2107 | bfd_boolean dyn; | |
2108 | dyn = htab->root.dynamic_sections_created; | |
2109 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
2110 | && (!info->shared | |
2111 | || !SYMBOL_REFERENCES_LOCAL (info, h))) | |
2112 | { | |
2113 | unresolved_reloc = FALSE; | |
2114 | indx = h->dynindx; | |
2115 | } | |
2116 | off = h->got.offset; | |
2117 | tls_type = (((struct elf32_nios2_link_hash_entry *) h) | |
2118 | ->tls_type); | |
2119 | } | |
2120 | else | |
2121 | { | |
2122 | if (local_got_offsets == NULL) | |
2123 | abort (); | |
2124 | off = local_got_offsets[r_symndx]; | |
2125 | tls_type = (elf32_nios2_local_got_tls_type (input_bfd) | |
2126 | [r_symndx]); | |
2127 | } | |
2128 | ||
2129 | if (tls_type == GOT_UNKNOWN) | |
2130 | abort (); | |
2131 | ||
2132 | if ((off & 1) != 0) | |
2133 | off &= ~1; | |
2134 | else | |
2135 | { | |
2136 | bfd_boolean need_relocs = FALSE; | |
2137 | Elf_Internal_Rela outrel; | |
2138 | bfd_byte *loc = NULL; | |
2139 | int cur_off = off; | |
2140 | ||
2141 | /* The GOT entries have not been initialized yet. Do it | |
2142 | now, and emit any relocations. If both an IE GOT and a | |
2143 | GD GOT are necessary, we emit the GD first. */ | |
2144 | ||
2145 | if ((info->shared || indx != 0) | |
2146 | && (h == NULL | |
2147 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2148 | || h->root.type != bfd_link_hash_undefweak)) | |
2149 | { | |
2150 | need_relocs = TRUE; | |
2151 | if (htab->root.srelgot == NULL) | |
2152 | abort (); | |
2153 | loc = htab->root.srelgot->contents; | |
2154 | loc += (htab->root.srelgot->reloc_count * | |
2155 | sizeof (Elf32_External_Rela)); | |
2156 | } | |
2157 | ||
2158 | if (tls_type & GOT_TLS_GD) | |
2159 | { | |
2160 | if (need_relocs) | |
2161 | { | |
2162 | outrel.r_addend = 0; | |
2163 | outrel.r_offset = (htab->root.sgot->output_section->vma | |
2164 | + htab->root.sgot->output_offset | |
2165 | + cur_off); | |
2166 | outrel.r_info = ELF32_R_INFO (indx, | |
2167 | R_NIOS2_TLS_DTPMOD); | |
2168 | ||
2169 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
2170 | loc); | |
2171 | htab->root.srelgot->reloc_count++; | |
2172 | loc += sizeof (Elf32_External_Rela); | |
2173 | ||
2174 | if (indx == 0) | |
2175 | bfd_put_32 (output_bfd, | |
2176 | (relocation - dtpoff_base (info) - | |
2177 | DTP_OFFSET), | |
2178 | htab->root.sgot->contents + cur_off + 4); | |
2179 | else | |
2180 | { | |
2181 | outrel.r_addend = 0; | |
2182 | outrel.r_info = ELF32_R_INFO (indx, | |
2183 | R_NIOS2_TLS_DTPREL); | |
2184 | outrel.r_offset += 4; | |
2185 | ||
2186 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
2187 | loc); | |
2188 | htab->root.srelgot->reloc_count++; | |
2189 | loc += sizeof (Elf32_External_Rela); | |
2190 | } | |
2191 | } | |
2192 | else | |
2193 | { | |
2194 | /* If we are not emitting relocations for a | |
2195 | general dynamic reference, then we must be in a | |
2196 | static link or an executable link with the | |
2197 | symbol binding locally. Mark it as belonging | |
2198 | to module 1, the executable. */ | |
2199 | bfd_put_32 (output_bfd, 1, | |
2200 | htab->root.sgot->contents + cur_off); | |
2201 | bfd_put_32 (output_bfd, (relocation - | |
2202 | dtpoff_base (info) - | |
2203 | DTP_OFFSET), | |
2204 | htab->root.sgot->contents + cur_off + 4); | |
2205 | } | |
2206 | ||
2207 | cur_off += 8; | |
2208 | } | |
2209 | ||
2210 | if (tls_type & GOT_TLS_IE) | |
2211 | { | |
2212 | if (need_relocs) | |
2213 | { | |
2214 | if (indx == 0) | |
2215 | outrel.r_addend = (relocation - | |
2216 | dtpoff_base (info)); | |
2217 | else | |
2218 | outrel.r_addend = 0; | |
2219 | outrel.r_offset = (htab->root.sgot->output_section->vma | |
2220 | + htab->root.sgot->output_offset | |
2221 | + cur_off); | |
2222 | outrel.r_info = ELF32_R_INFO (indx, | |
2223 | R_NIOS2_TLS_TPREL); | |
2224 | ||
2225 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
2226 | loc); | |
2227 | htab->root.srelgot->reloc_count++; | |
2228 | loc += sizeof (Elf32_External_Rela); | |
2229 | } | |
2230 | else | |
2231 | bfd_put_32 (output_bfd, (tpoff (info, relocation) | |
2232 | - TP_OFFSET), | |
2233 | htab->root.sgot->contents + cur_off); | |
2234 | cur_off += 4; | |
2235 | } | |
2236 | ||
2237 | if (h != NULL) | |
2238 | h->got.offset |= 1; | |
2239 | else | |
2240 | local_got_offsets[r_symndx] |= 1; | |
2241 | } | |
2242 | ||
2243 | if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16) | |
2244 | off += 8; | |
2245 | relocation = (htab->root.sgot->output_offset + off); | |
2246 | ||
2247 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2248 | contents, rel->r_offset, | |
2249 | relocation, rel->r_addend); | |
2250 | } | |
2251 | ||
2252 | break; | |
2253 | case R_NIOS2_TLS_LE16: | |
2254 | if (info->shared && !info->pie) | |
2255 | { | |
2256 | (*_bfd_error_handler) | |
2257 | (_("%B(%A+0x%lx): R_NIOS2_TLS_LE16 relocation not " | |
2258 | "permitted in shared object"), | |
2259 | input_bfd, input_section, | |
2260 | (long) rel->r_offset, howto->name); | |
2261 | return FALSE; | |
2262 | } | |
2263 | else | |
2264 | relocation = tpoff (info, relocation) - TP_OFFSET; | |
2265 | ||
2266 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2267 | contents, rel->r_offset, | |
2268 | relocation, rel->r_addend); | |
2269 | break; | |
2270 | ||
2271 | case R_NIOS2_BFD_RELOC_32: | |
2272 | if (info->shared | |
2273 | && (input_section->flags & SEC_ALLOC) != 0 | |
2274 | && (h == NULL | |
2275 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2276 | || h->root.type != bfd_link_hash_undefweak)) | |
2277 | { | |
2278 | Elf_Internal_Rela outrel; | |
2279 | bfd_byte *loc; | |
2280 | bfd_boolean skip, relocate; | |
2281 | ||
2282 | /* When generating a shared object, these relocations | |
2283 | are copied into the output file to be resolved at run | |
2284 | time. */ | |
2285 | ||
2286 | skip = FALSE; | |
2287 | relocate = FALSE; | |
2288 | ||
2289 | outrel.r_offset | |
2290 | = _bfd_elf_section_offset (output_bfd, info, | |
2291 | input_section, rel->r_offset); | |
2292 | if (outrel.r_offset == (bfd_vma) -1) | |
2293 | skip = TRUE; | |
2294 | else if (outrel.r_offset == (bfd_vma) -2) | |
2295 | skip = TRUE, relocate = TRUE; | |
2296 | outrel.r_offset += (input_section->output_section->vma | |
2297 | + input_section->output_offset); | |
2298 | ||
2299 | if (skip) | |
2300 | memset (&outrel, 0, sizeof outrel); | |
2301 | else if (h != NULL | |
2302 | && h->dynindx != -1 | |
2303 | && (!info->shared | |
2304 | || !info->symbolic | |
2305 | || !h->def_regular)) | |
2306 | { | |
2307 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
2308 | outrel.r_addend = rel->r_addend; | |
2309 | } | |
2310 | else | |
2311 | { | |
2312 | /* This symbol is local, or marked to become local. */ | |
2313 | outrel.r_addend = relocation + rel->r_addend; | |
2314 | relocate = TRUE; | |
2315 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); | |
2316 | } | |
2317 | ||
2318 | sreloc = elf_section_data (input_section)->sreloc; | |
2319 | if (sreloc == NULL) | |
2320 | abort (); | |
2321 | ||
2322 | loc = sreloc->contents; | |
2323 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2324 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2325 | ||
2326 | /* This reloc will be computed at runtime, so there's no | |
2327 | need to do anything now, except for R_NIOS2_BFD_RELOC_32 | |
2328 | relocations that have been turned into | |
2329 | R_NIOS2_RELATIVE. */ | |
2330 | if (!relocate) | |
2331 | break; | |
2332 | } | |
2333 | ||
2334 | r = _bfd_final_link_relocate (howto, input_bfd, | |
2335 | input_section, contents, | |
2336 | rel->r_offset, relocation, | |
2337 | rel->r_addend); | |
2338 | break; | |
2339 | ||
2340 | case R_NIOS2_TLS_DTPREL: | |
2341 | relocation -= dtpoff_base (info); | |
2342 | /* Fall through. */ | |
2343 | ||
2344 | default: | |
2345 | r = _bfd_final_link_relocate (howto, input_bfd, | |
2346 | input_section, contents, | |
2347 | rel->r_offset, relocation, | |
2348 | rel->r_addend); | |
2349 | break; | |
2350 | } | |
2351 | } | |
2352 | else | |
2353 | r = bfd_reloc_notsupported; | |
2354 | ||
2355 | if (r != bfd_reloc_ok) | |
2356 | { | |
2357 | if (h != NULL) | |
2358 | name = h->root.root.string; | |
2359 | else | |
2360 | { | |
2361 | name = bfd_elf_string_from_elf_section (input_bfd, | |
2362 | symtab_hdr->sh_link, | |
2363 | sym->st_name); | |
2364 | if (name == NULL || *name == '\0') | |
2365 | name = bfd_section_name (input_bfd, sec); | |
2366 | } | |
2367 | ||
2368 | switch (r) | |
2369 | { | |
2370 | case bfd_reloc_overflow: | |
2371 | r = info->callbacks->reloc_overflow (info, NULL, name, | |
2372 | howto->name, (bfd_vma) 0, | |
2373 | input_bfd, input_section, | |
2374 | rel->r_offset); | |
2375 | break; | |
2376 | ||
2377 | case bfd_reloc_undefined: | |
2378 | r = info->callbacks->undefined_symbol (info, name, input_bfd, | |
2379 | input_section, | |
2380 | rel->r_offset, TRUE); | |
2381 | break; | |
2382 | ||
2383 | case bfd_reloc_outofrange: | |
2384 | if (msg == NULL) | |
2385 | msg = _("relocation out of range"); | |
2386 | break; | |
2387 | ||
2388 | case bfd_reloc_notsupported: | |
2389 | if (msg == NULL) | |
2390 | msg = _("unsupported relocation"); | |
2391 | break; | |
2392 | ||
2393 | case bfd_reloc_dangerous: | |
2394 | if (msg == NULL) | |
2395 | msg = _("dangerous relocation"); | |
2396 | break; | |
2397 | ||
2398 | default: | |
2399 | if (msg == NULL) | |
2400 | msg = _("unknown error"); | |
2401 | break; | |
2402 | } | |
2403 | ||
2404 | if (msg) | |
2405 | { | |
2406 | r = info->callbacks->warning | |
2407 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
2408 | return FALSE; | |
2409 | } | |
2410 | } | |
2411 | } | |
2412 | return TRUE; | |
2413 | } | |
2414 | ||
2415 | /* Implement elf-backend_section_flags: | |
2416 | Convert NIOS2 specific section flags to bfd internal section flags. */ | |
2417 | static bfd_boolean | |
2418 | nios2_elf32_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) | |
2419 | { | |
2420 | if (hdr->sh_flags & SHF_NIOS2_GPREL) | |
2421 | *flags |= SEC_SMALL_DATA; | |
2422 | ||
2423 | return TRUE; | |
2424 | } | |
2425 | ||
2426 | /* Implement elf_backend_fake_sections: | |
2427 | Set the correct type for an NIOS2 ELF section. We do this by the | |
2428 | section name, which is a hack, but ought to work. */ | |
2429 | static bfd_boolean | |
2430 | nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, | |
2431 | Elf_Internal_Shdr *hdr, asection *sec) | |
2432 | { | |
2433 | register const char *name = bfd_get_section_name (abfd, sec); | |
2434 | ||
2435 | if ((sec->flags & SEC_SMALL_DATA) | |
2436 | || strcmp (name, ".sdata") == 0 | |
2437 | || strcmp (name, ".sbss") == 0 | |
2438 | || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0) | |
2439 | hdr->sh_flags |= SHF_NIOS2_GPREL; | |
2440 | ||
2441 | return TRUE; | |
2442 | } | |
2443 | ||
2444 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
2445 | shortcuts to them in our hash table. */ | |
2446 | static bfd_boolean | |
2447 | create_got_section (bfd *dynobj, struct bfd_link_info *info) | |
2448 | { | |
2449 | struct elf32_nios2_link_hash_table *htab; | |
2450 | ||
2451 | htab = elf32_nios2_hash_table (info); | |
2452 | ||
2453 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
2454 | return FALSE; | |
2455 | ||
2456 | /* In order for the two loads in .PLTresolve to share the same %hiadj, | |
2457 | _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */ | |
2458 | if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4)) | |
2459 | return FALSE; | |
2460 | ||
2461 | return TRUE; | |
2462 | } | |
2463 | ||
2464 | /* Implement elf_backend_create_dynamic_sections: | |
2465 | Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
2466 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
2467 | hash table. */ | |
2468 | static bfd_boolean | |
2469 | nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) | |
2470 | { | |
2471 | struct elf32_nios2_link_hash_table *htab; | |
2472 | ||
2473 | htab = elf32_nios2_hash_table (info); | |
2474 | if (!htab->root.sgot && !create_got_section (dynobj, info)) | |
2475 | return FALSE; | |
2476 | ||
2477 | _bfd_elf_create_dynamic_sections (dynobj, info); | |
2478 | ||
2479 | /* In order for the two loads in a shared object .PLTresolve to share the | |
2480 | same %hiadj, the start of the PLT (as well as the GOT) must be aligned | |
2481 | to a 16-byte boundary. This is because the addresses for these loads | |
2482 | include the -(.plt+4) PIC correction. */ | |
2483 | if (!bfd_set_section_alignment (dynobj, htab->root.splt, 4)) | |
2484 | return FALSE; | |
2485 | ||
2486 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); | |
2487 | if (!htab->sdynbss) | |
2488 | return FALSE; | |
2489 | if (!info->shared) | |
2490 | { | |
2491 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); | |
2492 | if (!htab->srelbss) | |
2493 | return FALSE; | |
2494 | } | |
2495 | ||
2496 | return TRUE; | |
2497 | } | |
2498 | ||
2499 | /* Implement elf_backend_copy_indirect_symbol: | |
2500 | Copy the extra info we tack onto an elf_link_hash_entry. */ | |
2501 | static void | |
2502 | nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info, | |
2503 | struct elf_link_hash_entry *dir, | |
2504 | struct elf_link_hash_entry *ind) | |
2505 | { | |
2506 | struct elf32_nios2_link_hash_entry *edir, *eind; | |
2507 | ||
2508 | edir = (struct elf32_nios2_link_hash_entry *) dir; | |
2509 | eind = (struct elf32_nios2_link_hash_entry *) ind; | |
2510 | ||
2511 | if (eind->dyn_relocs != NULL) | |
2512 | { | |
2513 | if (edir->dyn_relocs != NULL) | |
2514 | { | |
2515 | struct elf32_nios2_dyn_relocs **pp; | |
2516 | struct elf32_nios2_dyn_relocs *p; | |
2517 | ||
2518 | /* Add reloc counts against the indirect sym to the direct sym | |
2519 | list. Merge any entries against the same section. */ | |
2520 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
2521 | { | |
2522 | struct elf32_nios2_dyn_relocs *q; | |
2523 | ||
2524 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
2525 | if (q->sec == p->sec) | |
2526 | { | |
2527 | q->pc_count += p->pc_count; | |
2528 | q->count += p->count; | |
2529 | *pp = p->next; | |
2530 | break; | |
2531 | } | |
2532 | if (q == NULL) | |
2533 | pp = &p->next; | |
2534 | } | |
2535 | *pp = edir->dyn_relocs; | |
2536 | } | |
2537 | ||
2538 | edir->dyn_relocs = eind->dyn_relocs; | |
2539 | eind->dyn_relocs = NULL; | |
2540 | } | |
2541 | ||
2542 | if (ind->root.type == bfd_link_hash_indirect | |
2543 | && dir->got.refcount <= 0) | |
2544 | { | |
2545 | edir->tls_type = eind->tls_type; | |
2546 | eind->tls_type = GOT_UNKNOWN; | |
2547 | } | |
2548 | ||
2549 | edir->got_types_used |= eind->got_types_used; | |
2550 | ||
2551 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
2552 | } | |
2553 | ||
2554 | /* Implement elf_backend_check_relocs: | |
2555 | Look through the relocs for a section during the first phase. */ | |
2556 | static bfd_boolean | |
2557 | nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info, | |
2558 | asection *sec, const Elf_Internal_Rela *relocs) | |
2559 | { | |
2560 | bfd *dynobj; | |
2561 | Elf_Internal_Shdr *symtab_hdr; | |
2562 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
2563 | const Elf_Internal_Rela *rel; | |
2564 | const Elf_Internal_Rela *rel_end; | |
2565 | struct elf32_nios2_link_hash_table *htab; | |
2566 | asection *sgot; | |
2567 | asection *srelgot; | |
2568 | asection *sreloc = NULL; | |
2569 | bfd_signed_vma *local_got_refcounts; | |
2570 | ||
2571 | if (info->relocatable) | |
2572 | return TRUE; | |
2573 | ||
2574 | dynobj = elf_hash_table (info)->dynobj; | |
2575 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2576 | sym_hashes = elf_sym_hashes (abfd); | |
2577 | sym_hashes_end = (sym_hashes | |
2578 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); | |
2579 | if (!elf_bad_symtab (abfd)) | |
2580 | sym_hashes_end -= symtab_hdr->sh_info; | |
2581 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2582 | ||
2583 | htab = elf32_nios2_hash_table (info); | |
2584 | sgot = htab->root.sgot; | |
2585 | srelgot = htab->root.srelgot; | |
2586 | ||
2587 | rel_end = relocs + sec->reloc_count; | |
2588 | for (rel = relocs; rel < rel_end; rel++) | |
2589 | { | |
2590 | unsigned int r_type; | |
2591 | struct elf_link_hash_entry *h; | |
2592 | unsigned long r_symndx; | |
2593 | ||
2594 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2595 | if (r_symndx < symtab_hdr->sh_info) | |
2596 | h = NULL; | |
2597 | else | |
2598 | { | |
2599 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2600 | while (h->root.type == bfd_link_hash_indirect | |
2601 | || h->root.type == bfd_link_hash_warning) | |
2602 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
81fbe831 AM |
2603 | |
2604 | /* PR15323, ref flags aren't set for references in the same | |
2605 | object. */ | |
2606 | h->root.non_ir_ref = 1; | |
36591ba1 SL |
2607 | } |
2608 | ||
2609 | r_type = ELF32_R_TYPE (rel->r_info); | |
2610 | ||
2611 | switch (r_type) | |
2612 | { | |
2613 | case R_NIOS2_GOT16: | |
2614 | case R_NIOS2_CALL16: | |
2615 | case R_NIOS2_TLS_GD16: | |
2616 | case R_NIOS2_TLS_IE16: | |
2617 | /* This symbol requires a global offset table entry. */ | |
2618 | { | |
2619 | int tls_type, old_tls_type; | |
2620 | ||
2621 | switch (r_type) | |
2622 | { | |
2623 | default: | |
2624 | case R_NIOS2_GOT16: | |
2625 | case R_NIOS2_CALL16: | |
2626 | tls_type = GOT_NORMAL; | |
2627 | break; | |
2628 | case R_NIOS2_TLS_GD16: | |
2629 | tls_type = GOT_TLS_GD; | |
2630 | break; | |
2631 | case R_NIOS2_TLS_IE16: | |
2632 | tls_type = GOT_TLS_IE; | |
2633 | break; | |
2634 | } | |
2635 | ||
2636 | if (dynobj == NULL) | |
2637 | { | |
2638 | /* Create the .got section. */ | |
2639 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
2640 | nios2_elf32_create_dynamic_sections (dynobj, info); | |
2641 | } | |
2642 | ||
2643 | if (sgot == NULL) | |
2644 | { | |
2645 | sgot = htab->root.sgot; | |
2646 | BFD_ASSERT (sgot != NULL); | |
2647 | } | |
2648 | ||
2649 | if (srelgot == NULL | |
2650 | && (h != NULL || info->shared)) | |
2651 | { | |
2652 | srelgot = htab->root.srelgot; | |
2653 | BFD_ASSERT (srelgot != NULL); | |
2654 | } | |
2655 | ||
2656 | if (h != NULL) | |
2657 | { | |
2658 | struct elf32_nios2_link_hash_entry *eh | |
2659 | = (struct elf32_nios2_link_hash_entry *)h; | |
2660 | h->got.refcount++; | |
2661 | old_tls_type = elf32_nios2_hash_entry(h)->tls_type; | |
2662 | if (r_type == R_NIOS2_CALL16) | |
2663 | { | |
2664 | /* Make sure a plt entry is created for this symbol if | |
2665 | it turns out to be a function defined by a dynamic | |
2666 | object. */ | |
2667 | h->plt.refcount++; | |
2668 | h->needs_plt = 1; | |
2669 | h->type = STT_FUNC; | |
2670 | eh->got_types_used |= CALL16_USED; | |
2671 | } | |
2672 | else | |
2673 | eh->got_types_used |= GOT16_USED; | |
2674 | } | |
2675 | else | |
2676 | { | |
2677 | /* This is a global offset table entry for a local symbol. */ | |
2678 | if (local_got_refcounts == NULL) | |
2679 | { | |
2680 | bfd_size_type size; | |
2681 | ||
2682 | size = symtab_hdr->sh_info; | |
2683 | size *= (sizeof (bfd_signed_vma) + sizeof (char)); | |
2684 | local_got_refcounts | |
2685 | = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); | |
2686 | if (local_got_refcounts == NULL) | |
2687 | return FALSE; | |
2688 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
2689 | elf32_nios2_local_got_tls_type (abfd) | |
2690 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
2691 | } | |
2692 | local_got_refcounts[r_symndx]++; | |
2693 | old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx]; | |
2694 | } | |
2695 | ||
2696 | /* We will already have issued an error message if there is a | |
2697 | TLS / non-TLS mismatch, based on the symbol type. We don't | |
2698 | support any linker relaxations. So just combine any TLS | |
2699 | types needed. */ | |
2700 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL | |
2701 | && tls_type != GOT_NORMAL) | |
2702 | tls_type |= old_tls_type; | |
2703 | ||
2704 | if (old_tls_type != tls_type) | |
2705 | { | |
2706 | if (h != NULL) | |
2707 | elf32_nios2_hash_entry (h)->tls_type = tls_type; | |
2708 | else | |
2709 | elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
2710 | } | |
2711 | } | |
2712 | /* Fall through */ | |
2713 | case R_NIOS2_TLS_LDM16: | |
2714 | if (r_type == R_NIOS2_TLS_LDM16) | |
2715 | htab->tls_ldm_got.refcount++; | |
2716 | ||
2717 | if (htab->root.sgot == NULL) | |
2718 | { | |
2719 | if (htab->root.dynobj == NULL) | |
2720 | htab->root.dynobj = abfd; | |
2721 | if (!create_got_section (htab->root.dynobj, info)) | |
2722 | return FALSE; | |
2723 | } | |
2724 | break; | |
2725 | ||
2726 | /* This relocation describes the C++ object vtable hierarchy. | |
2727 | Reconstruct it for later use during GC. */ | |
2728 | case R_NIOS2_GNU_VTINHERIT: | |
2729 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
2730 | return FALSE; | |
2731 | break; | |
2732 | ||
2733 | /* This relocation describes which C++ vtable entries are actually | |
2734 | used. Record for later use during GC. */ | |
2735 | case R_NIOS2_GNU_VTENTRY: | |
2736 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
2737 | return FALSE; | |
2738 | break; | |
2739 | ||
2740 | case R_NIOS2_BFD_RELOC_32: | |
2741 | case R_NIOS2_CALL26: | |
2742 | case R_NIOS2_HIADJ16: | |
2743 | case R_NIOS2_LO16: | |
2744 | ||
2745 | if (h != NULL) | |
2746 | { | |
2747 | /* If this reloc is in a read-only section, we might | |
2748 | need a copy reloc. We can't check reliably at this | |
2749 | stage whether the section is read-only, as input | |
2750 | sections have not yet been mapped to output sections. | |
2751 | Tentatively set the flag for now, and correct in | |
2752 | adjust_dynamic_symbol. */ | |
2753 | if (!info->shared) | |
2754 | h->non_got_ref = 1; | |
2755 | ||
2756 | /* Make sure a plt entry is created for this symbol if it | |
2757 | turns out to be a function defined by a dynamic object. */ | |
2758 | h->plt.refcount++; | |
2759 | ||
2760 | if (r_type == R_NIOS2_CALL26) | |
2761 | h->needs_plt = 1; | |
2762 | } | |
2763 | ||
2764 | /* If we are creating a shared library, we need to copy the | |
2765 | reloc into the shared library. */ | |
2766 | if (info->shared | |
2767 | && (sec->flags & SEC_ALLOC) != 0 | |
2768 | && (r_type == R_NIOS2_BFD_RELOC_32 | |
2769 | || (h != NULL && ! h->needs_plt | |
2770 | && (! info->symbolic || ! h->def_regular)))) | |
2771 | { | |
2772 | struct elf32_nios2_dyn_relocs *p; | |
2773 | struct elf32_nios2_dyn_relocs **head; | |
2774 | ||
2775 | /* When creating a shared object, we must copy these | |
2776 | reloc types into the output file. We create a reloc | |
2777 | section in dynobj and make room for this reloc. */ | |
2778 | if (sreloc == NULL) | |
2779 | { | |
2780 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
2781 | (sec, dynobj, 2, abfd, TRUE); | |
2782 | if (sreloc == NULL) | |
2783 | return FALSE; | |
2784 | } | |
2785 | ||
2786 | /* If this is a global symbol, we count the number of | |
2787 | relocations we need for this symbol. */ | |
2788 | if (h != NULL) | |
2789 | head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs; | |
2790 | else | |
2791 | { | |
2792 | /* Track dynamic relocs needed for local syms too. | |
2793 | We really need local syms available to do this | |
2794 | easily. Oh well. */ | |
2795 | ||
2796 | asection *s; | |
2797 | void *vpp; | |
2798 | Elf_Internal_Sym *isym; | |
2799 | ||
2800 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2801 | abfd, r_symndx); | |
2802 | if (isym == NULL) | |
2803 | return FALSE; | |
2804 | ||
2805 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
2806 | if (s == NULL) | |
2807 | s = sec; | |
2808 | ||
2809 | vpp = &elf_section_data (s)->local_dynrel; | |
2810 | head = (struct elf32_nios2_dyn_relocs **) vpp; | |
2811 | } | |
2812 | ||
2813 | p = *head; | |
2814 | if (p == NULL || p->sec != sec) | |
2815 | { | |
2816 | bfd_size_type amt = sizeof *p; | |
2817 | p = ((struct elf32_nios2_dyn_relocs *) | |
2818 | bfd_alloc (htab->root.dynobj, amt)); | |
2819 | if (p == NULL) | |
2820 | return FALSE; | |
2821 | p->next = *head; | |
2822 | *head = p; | |
2823 | p->sec = sec; | |
2824 | p->count = 0; | |
2825 | p->pc_count = 0; | |
2826 | } | |
2827 | ||
2828 | p->count += 1; | |
2829 | ||
2830 | } | |
2831 | break; | |
2832 | } | |
2833 | } | |
2834 | ||
2835 | return TRUE; | |
2836 | } | |
2837 | ||
2838 | ||
2839 | /* Implement elf_backend_gc_mark_hook: | |
2840 | Return the section that should be marked against GC for a given | |
2841 | relocation. */ | |
2842 | static asection * | |
2843 | nios2_elf32_gc_mark_hook (asection *sec, | |
25153ba0 | 2844 | struct bfd_link_info *info, |
36591ba1 SL |
2845 | Elf_Internal_Rela *rel, |
2846 | struct elf_link_hash_entry *h, | |
2847 | Elf_Internal_Sym *sym) | |
2848 | { | |
2849 | if (h != NULL) | |
2850 | switch (ELF32_R_TYPE (rel->r_info)) | |
2851 | { | |
2852 | case R_NIOS2_GNU_VTINHERIT: | |
2853 | case R_NIOS2_GNU_VTENTRY: | |
2854 | return NULL; | |
2855 | } | |
2856 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
2857 | } | |
2858 | ||
2859 | /* Implement elf_backend_gc_sweep_hook: | |
2860 | Update the got entry reference counts for the section being removed. */ | |
2861 | static bfd_boolean | |
2862 | nios2_elf32_gc_sweep_hook (bfd *abfd, | |
2863 | struct bfd_link_info *info, | |
2864 | asection *sec, | |
2865 | const Elf_Internal_Rela *relocs) | |
2866 | { | |
2867 | Elf_Internal_Shdr *symtab_hdr; | |
2868 | struct elf_link_hash_entry **sym_hashes; | |
2869 | bfd_signed_vma *local_got_refcounts; | |
2870 | const Elf_Internal_Rela *rel, *relend; | |
2871 | bfd *dynobj; | |
2872 | ||
2873 | if (info->relocatable) | |
2874 | return TRUE; | |
2875 | ||
2876 | elf_section_data (sec)->local_dynrel = NULL; | |
2877 | ||
2878 | dynobj = elf_hash_table (info)->dynobj; | |
2879 | if (dynobj == NULL) | |
2880 | return TRUE; | |
2881 | ||
2882 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2883 | sym_hashes = elf_sym_hashes (abfd); | |
2884 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2885 | ||
2886 | relend = relocs + sec->reloc_count; | |
2887 | for (rel = relocs; rel < relend; rel++) | |
2888 | { | |
2889 | unsigned long r_symndx; | |
2890 | struct elf_link_hash_entry *h = NULL; | |
2891 | int r_type; | |
2892 | ||
2893 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2894 | if (r_symndx >= symtab_hdr->sh_info) | |
2895 | { | |
2896 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2897 | while (h->root.type == bfd_link_hash_indirect | |
2898 | || h->root.type == bfd_link_hash_warning) | |
2899 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2900 | } | |
2901 | ||
2902 | r_type = ELF32_R_TYPE (rel->r_info); | |
2903 | switch (r_type) | |
2904 | { | |
2905 | case R_NIOS2_GOT16: | |
2906 | case R_NIOS2_CALL16: | |
2907 | if (h != NULL) | |
2908 | { | |
2909 | if (h->got.refcount > 0) | |
2910 | --h->got.refcount; | |
2911 | } | |
2912 | else if (local_got_refcounts != NULL) | |
2913 | { | |
2914 | if (local_got_refcounts[r_symndx] > 0) | |
2915 | --local_got_refcounts[r_symndx]; | |
2916 | } | |
2917 | break; | |
2918 | ||
2919 | case R_NIOS2_PCREL_LO: | |
2920 | case R_NIOS2_PCREL_HA: | |
2921 | case R_NIOS2_BFD_RELOC_32: | |
2922 | case R_NIOS2_CALL26: | |
2923 | if (h != NULL) | |
2924 | { | |
2925 | struct elf32_nios2_link_hash_entry *eh; | |
2926 | struct elf32_nios2_dyn_relocs **pp; | |
2927 | struct elf32_nios2_dyn_relocs *p; | |
2928 | ||
2929 | eh = (struct elf32_nios2_link_hash_entry *) h; | |
2930 | ||
2931 | if (h->plt.refcount > 0) | |
2932 | --h->plt.refcount; | |
2933 | ||
2934 | if (r_type == R_NIOS2_PCREL_LO || r_type == R_NIOS2_PCREL_HA | |
2935 | || r_type == R_NIOS2_BFD_RELOC_32) | |
2936 | { | |
2937 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; | |
2938 | pp = &p->next) | |
2939 | if (p->sec == sec) | |
2940 | { | |
2941 | p->count -= 1; | |
2942 | if (p->count == 0) | |
2943 | *pp = p->next; | |
2944 | break; | |
2945 | } | |
2946 | } | |
2947 | } | |
2948 | break; | |
2949 | ||
2950 | default: | |
2951 | break; | |
2952 | } | |
2953 | } | |
2954 | ||
2955 | return TRUE; | |
2956 | } | |
2957 | ||
2958 | /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */ | |
2959 | static void | |
2960 | nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value) | |
2961 | { | |
2962 | bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset); | |
2963 | ||
2964 | BFD_ASSERT(value <= 0xffff); | |
2965 | ||
2966 | bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6), | |
2967 | sec->contents + offset); | |
2968 | } | |
2969 | ||
2970 | /* Install COUNT 32-bit values DATA starting at offset OFFSET into | |
2971 | section SEC. */ | |
2972 | static void | |
2973 | nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset, | |
2974 | int count) | |
2975 | { | |
2976 | while (count--) | |
2977 | { | |
2978 | bfd_put_32 (sec->owner, *data, sec->contents + offset); | |
2979 | offset += 4; | |
2980 | ++data; | |
2981 | } | |
2982 | } | |
2983 | ||
2984 | /* Implement elf_backend_finish_dynamic_symbols: | |
2985 | Finish up dynamic symbol handling. We set the contents of various | |
2986 | dynamic sections here. */ | |
2987 | static bfd_boolean | |
2988 | nios2_elf32_finish_dynamic_symbol (bfd *output_bfd, | |
2989 | struct bfd_link_info *info, | |
2990 | struct elf_link_hash_entry *h, | |
2991 | Elf_Internal_Sym *sym) | |
2992 | { | |
2993 | struct elf32_nios2_link_hash_table *htab; | |
2994 | struct elf32_nios2_link_hash_entry *eh | |
2995 | = (struct elf32_nios2_link_hash_entry *)h; | |
2996 | int use_plt; | |
2997 | ||
2998 | htab = elf32_nios2_hash_table (info); | |
2999 | ||
3000 | if (h->plt.offset != (bfd_vma) -1) | |
3001 | { | |
3002 | asection *splt; | |
3003 | asection *sgotplt; | |
3004 | asection *srela; | |
3005 | bfd_vma plt_index; | |
3006 | bfd_vma got_offset; | |
3007 | Elf_Internal_Rela rela; | |
3008 | bfd_byte *loc; | |
3009 | bfd_vma got_address; | |
3010 | ||
3011 | /* This symbol has an entry in the procedure linkage table. Set | |
3012 | it up. */ | |
3013 | BFD_ASSERT (h->dynindx != -1); | |
3014 | splt = htab->root.splt; | |
3015 | sgotplt = htab->root.sgotplt; | |
3016 | srela = htab->root.srelplt; | |
3017 | BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL); | |
3018 | ||
3019 | /* Emit the PLT entry. */ | |
3020 | if (info->shared) | |
3021 | { | |
3022 | nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset, | |
3023 | 3); | |
3024 | plt_index = (h->plt.offset - 24) / 12; | |
3025 | got_offset = (plt_index + 3) * 4; | |
3026 | nios2_elf32_install_imm16 (splt, h->plt.offset, | |
3027 | hiadj(plt_index * 4)); | |
3028 | nios2_elf32_install_imm16 (splt, h->plt.offset + 4, | |
3029 | (plt_index * 4) & 0xffff); | |
3030 | nios2_elf32_install_imm16 (splt, h->plt.offset + 8, | |
3031 | 0xfff4 - h->plt.offset); | |
3032 | got_address = (sgotplt->output_section->vma + sgotplt->output_offset | |
3033 | + got_offset); | |
3034 | ||
3035 | /* Fill in the entry in the global offset table. There are no | |
3036 | res_n slots for a shared object PLT, instead the .got.plt entries | |
3037 | point to the PLT entries. */ | |
3038 | bfd_put_32 (output_bfd, | |
3039 | splt->output_section->vma + splt->output_offset | |
3040 | + h->plt.offset, sgotplt->contents + got_offset); | |
3041 | } | |
3042 | else | |
3043 | { | |
3044 | plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12; | |
3045 | got_offset = (plt_index + 3) * 4; | |
3046 | ||
3047 | nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3); | |
3048 | got_address = (sgotplt->output_section->vma + sgotplt->output_offset | |
3049 | + got_offset); | |
3050 | nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address)); | |
3051 | nios2_elf32_install_imm16 (splt, h->plt.offset + 4, | |
3052 | got_address & 0xffff); | |
3053 | ||
3054 | /* Fill in the entry in the global offset table. */ | |
3055 | bfd_put_32 (output_bfd, | |
3056 | splt->output_section->vma + splt->output_offset | |
3057 | + plt_index * 4, sgotplt->contents + got_offset); | |
3058 | } | |
3059 | ||
3060 | /* Fill in the entry in the .rela.plt section. */ | |
3061 | rela.r_offset = got_address; | |
3062 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT); | |
3063 | rela.r_addend = 0; | |
3064 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); | |
3065 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
3066 | ||
3067 | if (!h->def_regular) | |
3068 | { | |
3069 | /* Mark the symbol as undefined, rather than as defined in | |
3070 | the .plt section. Leave the value alone. */ | |
3071 | sym->st_shndx = SHN_UNDEF; | |
3072 | /* If the symbol is weak, we do need to clear the value. | |
3073 | Otherwise, the PLT entry would provide a definition for | |
3074 | the symbol even if the symbol wasn't defined anywhere, | |
3075 | and so the symbol would never be NULL. */ | |
3076 | if (!h->ref_regular_nonweak) | |
3077 | sym->st_value = 0; | |
3078 | } | |
3079 | } | |
3080 | ||
3081 | use_plt = (eh->got_types_used == CALL16_USED | |
3082 | && h->plt.offset != (bfd_vma) -1); | |
3083 | ||
3084 | if (!use_plt && h->got.offset != (bfd_vma) -1 | |
3085 | && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 | |
3086 | && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) | |
3087 | { | |
3088 | asection *sgot; | |
3089 | asection *srela; | |
3090 | Elf_Internal_Rela rela; | |
3091 | bfd_byte *loc; | |
3092 | bfd_vma offset; | |
3093 | ||
3094 | /* This symbol has an entry in the global offset table. Set it | |
3095 | up. */ | |
3096 | sgot = htab->root.sgot; | |
3097 | srela = htab->root.srelgot; | |
3098 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
3099 | ||
3100 | offset = (h->got.offset & ~(bfd_vma) 1); | |
3101 | rela.r_offset = (sgot->output_section->vma | |
3102 | + sgot->output_offset + offset); | |
3103 | ||
3104 | /* If this is a -Bsymbolic link, and the symbol is defined | |
3105 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
3106 | the symbol was forced to be local because of a version file. | |
3107 | The entry in the global offset table will already have been | |
3108 | initialized in the relocate_section function. */ | |
3109 | ||
3110 | if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) | |
3111 | { | |
3112 | rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); | |
3113 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
3114 | (sgot->contents + offset)); | |
3115 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); | |
3116 | } | |
3117 | else | |
3118 | { | |
3119 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3120 | sgot->contents + offset); | |
3121 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT); | |
3122 | rela.r_addend = 0; | |
3123 | } | |
3124 | ||
3125 | loc = srela->contents; | |
3126 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
3127 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
3128 | } | |
3129 | ||
3130 | if (use_plt && h->got.offset != (bfd_vma) -1) | |
3131 | { | |
3132 | bfd_vma offset = (h->got.offset & ~(bfd_vma) 1); | |
3133 | asection *sgot = htab->root.sgot; | |
3134 | asection *splt = htab->root.splt; | |
3135 | bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset | |
3136 | + h->plt.offset), | |
3137 | sgot->contents + offset); | |
3138 | } | |
3139 | ||
3140 | if (h->needs_copy) | |
3141 | { | |
3142 | asection *s; | |
3143 | Elf_Internal_Rela rela; | |
3144 | bfd_byte *loc; | |
3145 | ||
3146 | /* This symbol needs a copy reloc. Set it up. */ | |
3147 | BFD_ASSERT (h->dynindx != -1 | |
3148 | && (h->root.type == bfd_link_hash_defined | |
3149 | || h->root.type == bfd_link_hash_defweak)); | |
3150 | ||
3151 | s = htab->srelbss; | |
3152 | BFD_ASSERT (s != NULL); | |
3153 | ||
3154 | rela.r_offset = (h->root.u.def.value | |
3155 | + h->root.u.def.section->output_section->vma | |
3156 | + h->root.u.def.section->output_offset); | |
3157 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY); | |
3158 | rela.r_addend = 0; | |
3159 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); | |
3160 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
3161 | } | |
3162 | ||
3163 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3164 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3165 | || h == elf_hash_table (info)->hgot) | |
3166 | sym->st_shndx = SHN_ABS; | |
3167 | ||
3168 | return TRUE; | |
3169 | } | |
3170 | ||
3171 | /* Implement elf_backend_finish_dynamic_sections. */ | |
3172 | static bfd_boolean | |
3173 | nios2_elf32_finish_dynamic_sections (bfd *output_bfd, | |
3174 | struct bfd_link_info *info) | |
3175 | { | |
3176 | bfd *dynobj; | |
3177 | asection *sgotplt; | |
3178 | asection *sdyn; | |
3179 | struct elf32_nios2_link_hash_table *htab; | |
3180 | ||
3181 | htab = elf32_nios2_hash_table (info); | |
3182 | dynobj = elf_hash_table (info)->dynobj; | |
3183 | sgotplt = htab->root.sgotplt; | |
3184 | BFD_ASSERT (sgotplt != NULL); | |
3185 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
3186 | ||
3187 | if (elf_hash_table (info)->dynamic_sections_created) | |
3188 | { | |
3189 | asection *splt; | |
3190 | Elf32_External_Dyn *dyncon, *dynconend; | |
3191 | ||
3192 | splt = htab->root.splt; | |
3193 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
3194 | ||
3195 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3196 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
3197 | for (; dyncon < dynconend; dyncon++) | |
3198 | { | |
3199 | Elf_Internal_Dyn dyn; | |
3200 | asection *s; | |
3201 | ||
3202 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3203 | ||
3204 | switch (dyn.d_tag) | |
3205 | { | |
3206 | default: | |
3207 | break; | |
3208 | ||
3209 | case DT_PLTGOT: | |
3210 | s = htab->root.sgot; | |
3211 | BFD_ASSERT (s != NULL); | |
3212 | dyn.d_un.d_ptr = s->output_section->vma; | |
3213 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3214 | break; | |
3215 | ||
3216 | case DT_JMPREL: | |
3217 | s = htab->root.srelplt; | |
3218 | BFD_ASSERT (s != NULL); | |
3219 | dyn.d_un.d_ptr = s->output_section->vma; | |
3220 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3221 | break; | |
3222 | ||
3223 | case DT_PLTRELSZ: | |
3224 | s = htab->root.srelplt; | |
3225 | BFD_ASSERT (s != NULL); | |
3226 | dyn.d_un.d_val = s->size; | |
3227 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3228 | break; | |
3229 | ||
3230 | case DT_RELASZ: | |
3231 | /* The procedure linkage table relocs (DT_JMPREL) should | |
3232 | not be included in the overall relocs (DT_RELA). | |
3233 | Therefore, we override the DT_RELASZ entry here to | |
3234 | make it not include the JMPREL relocs. Since the | |
3235 | linker script arranges for .rela.plt to follow all | |
3236 | other relocation sections, we don't have to worry | |
3237 | about changing the DT_RELA entry. */ | |
3238 | s = htab->root.srelplt; | |
3239 | if (s != NULL) | |
3240 | dyn.d_un.d_val -= s->size; | |
3241 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3242 | break; | |
3243 | ||
3244 | case DT_NIOS2_GP: | |
3245 | s = htab->root.sgot; | |
3246 | BFD_ASSERT (s != NULL); | |
3247 | dyn.d_un.d_ptr = s->output_section->vma + 0x7ff0; | |
3248 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3249 | break; | |
3250 | } | |
3251 | } | |
3252 | ||
3253 | /* Fill in the first entry in the procedure linkage table. */ | |
3254 | if (splt->size > 0) | |
3255 | { | |
3256 | bfd_vma got_address = (sgotplt->output_section->vma | |
3257 | + sgotplt->output_offset); | |
3258 | if (info->shared) | |
3259 | { | |
3260 | bfd_vma corrected = got_address - (splt->output_section->vma | |
3261 | + splt->output_offset + 4); | |
3262 | nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6); | |
3263 | nios2_elf32_install_imm16 (splt, 4, hiadj (corrected)); | |
3264 | nios2_elf32_install_imm16 (splt, 12, (corrected & 0xffff) + 4); | |
3265 | nios2_elf32_install_imm16 (splt, 16, (corrected & 0xffff) + 8); | |
36591ba1 SL |
3266 | } |
3267 | else | |
3268 | { | |
3269 | /* Divide by 4 here, not 3 because we already corrected for the | |
3270 | res_N branches. */ | |
3271 | bfd_vma res_size = (splt->size - 28) / 4; | |
3272 | bfd_vma res_start = (splt->output_section->vma | |
3273 | + splt->output_offset); | |
3274 | bfd_vma res_offset; | |
3275 | ||
3276 | for (res_offset = 0; res_offset < res_size; res_offset += 4) | |
3277 | bfd_put_32 (output_bfd, | |
3278 | 6 | ((res_size - (res_offset + 4)) << 6), | |
3279 | splt->contents + res_offset); | |
3280 | ||
3281 | nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7); | |
3282 | nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start)); | |
3283 | nios2_elf32_install_imm16 (splt, res_size + 4, | |
3284 | res_start & 0xffff); | |
3285 | nios2_elf32_install_imm16 (splt, res_size + 12, | |
3286 | hiadj (got_address)); | |
3287 | nios2_elf32_install_imm16 (splt, res_size + 16, | |
3288 | (got_address & 0xffff) + 4); | |
3289 | nios2_elf32_install_imm16 (splt, res_size + 20, | |
3290 | (got_address & 0xffff) + 8); | |
36591ba1 SL |
3291 | } |
3292 | } | |
3293 | } | |
3294 | /* Fill in the first three entries in the global offset table. */ | |
3295 | if (sgotplt->size > 0) | |
3296 | { | |
3297 | if (sdyn == NULL) | |
3298 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents); | |
3299 | else | |
3300 | bfd_put_32 (output_bfd, | |
3301 | sdyn->output_section->vma + sdyn->output_offset, | |
3302 | sgotplt->contents); | |
3303 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4); | |
3304 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8); | |
3305 | } | |
3306 | ||
3307 | elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4; | |
3308 | ||
3309 | return TRUE; | |
3310 | } | |
3311 | ||
3312 | /* Implement elf_backend_adjust_dynamic_symbol: | |
3313 | Adjust a symbol defined by a dynamic object and referenced by a | |
3314 | regular object. The current definition is in some section of the | |
3315 | dynamic object, but we're not including those sections. We have to | |
3316 | change the definition to something the rest of the link can | |
3317 | understand. */ | |
3318 | static bfd_boolean | |
3319 | nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info, | |
3320 | struct elf_link_hash_entry *h) | |
3321 | { | |
3322 | struct elf32_nios2_link_hash_table *htab; | |
3323 | bfd *dynobj; | |
3324 | asection *s; | |
3325 | unsigned align2; | |
3326 | ||
3327 | htab = elf32_nios2_hash_table (info); | |
3328 | dynobj = elf_hash_table (info)->dynobj; | |
3329 | ||
3330 | /* Make sure we know what is going on here. */ | |
3331 | BFD_ASSERT (dynobj != NULL | |
3332 | && (h->needs_plt | |
3333 | || h->u.weakdef != NULL | |
3334 | || (h->def_dynamic | |
3335 | && h->ref_regular | |
3336 | && !h->def_regular))); | |
3337 | ||
3338 | /* If this is a function, put it in the procedure linkage table. We | |
3339 | will fill in the contents of the procedure linkage table later, | |
3340 | when we know the address of the .got section. */ | |
3341 | if (h->type == STT_FUNC || h->needs_plt) | |
3342 | { | |
3343 | if (h->plt.refcount <= 0 | |
3344 | || SYMBOL_CALLS_LOCAL (info, h) | |
3345 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3346 | && h->root.type == bfd_link_hash_undefweak)) | |
3347 | { | |
3348 | /* This case can occur if we saw a PLT reloc in an input | |
3349 | file, but the symbol was never referred to by a dynamic | |
3350 | object, or if all references were garbage collected. In | |
3351 | such a case, we don't actually need to build a procedure | |
3352 | linkage table, and we can just do a PCREL reloc instead. */ | |
3353 | h->plt.offset = (bfd_vma) -1; | |
3354 | h->needs_plt = 0; | |
3355 | } | |
3356 | ||
3357 | return TRUE; | |
3358 | } | |
3359 | ||
3360 | /* Reinitialize the plt offset now that it is not used as a reference | |
3361 | count any more. */ | |
3362 | h->plt.offset = (bfd_vma) -1; | |
3363 | ||
3364 | /* If this is a weak symbol, and there is a real definition, the | |
3365 | processor independent code will have arranged for us to see the | |
3366 | real definition first, and we can just use the same value. */ | |
3367 | if (h->u.weakdef != NULL) | |
3368 | { | |
3369 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined | |
3370 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
3371 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
3372 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
3373 | return TRUE; | |
3374 | } | |
3375 | ||
3376 | /* If there are no non-GOT references, we do not need a copy | |
3377 | relocation. */ | |
3378 | if (!h->non_got_ref) | |
3379 | return TRUE; | |
3380 | ||
3381 | /* This is a reference to a symbol defined by a dynamic object which | |
3382 | is not a function. | |
3383 | If we are creating a shared library, we must presume that the | |
3384 | only references to the symbol are via the global offset table. | |
3385 | For such cases we need not do anything here; the relocations will | |
3386 | be handled correctly by relocate_section. */ | |
3387 | if (info->shared) | |
3388 | return TRUE; | |
3389 | ||
3390 | if (h->size == 0) | |
3391 | { | |
3392 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
3393 | h->root.root.string); | |
3394 | return TRUE; | |
3395 | } | |
3396 | ||
3397 | /* We must allocate the symbol in our .dynbss section, which will | |
3398 | become part of the .bss section of the executable. There will be | |
3399 | an entry for this symbol in the .dynsym section. The dynamic | |
3400 | object will contain position independent code, so all references | |
3401 | from the dynamic object to this symbol will go through the global | |
3402 | offset table. The dynamic linker will use the .dynsym entry to | |
3403 | determine the address it must put in the global offset table, so | |
3404 | both the dynamic object and the regular object will refer to the | |
3405 | same memory location for the variable. */ | |
3406 | s = htab->sdynbss; | |
3407 | BFD_ASSERT (s != NULL); | |
3408 | ||
3409 | /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to | |
3410 | copy the initial value out of the dynamic object and into the | |
3411 | runtime process image. We need to remember the offset into the | |
3412 | .rela.bss section we are going to use. */ | |
3413 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
3414 | { | |
3415 | asection *srel; | |
3416 | ||
3417 | srel = htab->srelbss; | |
3418 | BFD_ASSERT (srel != NULL); | |
3419 | srel->size += sizeof (Elf32_External_Rela); | |
3420 | h->needs_copy = 1; | |
3421 | } | |
3422 | ||
3423 | align2 = bfd_log2 (h->size); | |
3424 | if (align2 > h->root.u.def.section->alignment_power) | |
3425 | align2 = h->root.u.def.section->alignment_power; | |
3426 | ||
3427 | /* Align dynbss. */ | |
3428 | s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2); | |
3429 | if (align2 > bfd_get_section_alignment (dynobj, s) | |
3430 | && !bfd_set_section_alignment (dynobj, s, align2)) | |
3431 | return FALSE; | |
3432 | ||
3433 | /* Define the symbol as being at this point in the section. */ | |
3434 | h->root.u.def.section = s; | |
3435 | h->root.u.def.value = s->size; | |
3436 | ||
3437 | /* Increment the section size to make room for the symbol. */ | |
3438 | s->size += h->size; | |
3439 | ||
3440 | return TRUE; | |
3441 | } | |
3442 | ||
3443 | /* Worker function for nios2_elf32_size_dynamic_sections. */ | |
3444 | static bfd_boolean | |
3445 | adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf) | |
3446 | { | |
3447 | struct bfd_link_info *info; | |
3448 | struct elf32_nios2_link_hash_table *htab; | |
3449 | ||
3450 | if (h->root.type == bfd_link_hash_indirect) | |
3451 | return TRUE; | |
3452 | ||
3453 | if (h->root.type == bfd_link_hash_warning) | |
3454 | /* When warning symbols are created, they **replace** the "real" | |
3455 | entry in the hash table, thus we never get to see the real | |
3456 | symbol in a hash traversal. So look at it now. */ | |
3457 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3458 | ||
3459 | info = (struct bfd_link_info *) inf; | |
3460 | htab = elf32_nios2_hash_table (info); | |
3461 | ||
3462 | if (h->plt.offset != (bfd_vma)-1) | |
3463 | h->plt.offset += htab->res_n_size; | |
3464 | if (htab->root.splt == h->root.u.def.section) | |
3465 | h->root.u.def.value += htab->res_n_size; | |
3466 | ||
3467 | return TRUE; | |
3468 | } | |
3469 | ||
3470 | /* Another worker function for nios2_elf32_size_dynamic_sections. | |
3471 | Allocate space in .plt, .got and associated reloc sections for | |
3472 | dynamic relocs. */ | |
3473 | static bfd_boolean | |
3474 | allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) | |
3475 | { | |
3476 | struct bfd_link_info *info; | |
3477 | struct elf32_nios2_link_hash_table *htab; | |
3478 | struct elf32_nios2_link_hash_entry *eh; | |
3479 | struct elf32_nios2_dyn_relocs *p; | |
3480 | int use_plt; | |
3481 | ||
3482 | if (h->root.type == bfd_link_hash_indirect) | |
3483 | return TRUE; | |
3484 | ||
3485 | if (h->root.type == bfd_link_hash_warning) | |
3486 | /* When warning symbols are created, they **replace** the "real" | |
3487 | entry in the hash table, thus we never get to see the real | |
3488 | symbol in a hash traversal. So look at it now. */ | |
3489 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3490 | ||
3491 | info = (struct bfd_link_info *) inf; | |
3492 | htab = elf32_nios2_hash_table (info); | |
3493 | ||
3494 | if (htab->root.dynamic_sections_created | |
3495 | && h->plt.refcount > 0) | |
3496 | { | |
3497 | /* Make sure this symbol is output as a dynamic symbol. | |
3498 | Undefined weak syms won't yet be marked as dynamic. */ | |
3499 | if (h->dynindx == -1 | |
3500 | && !h->forced_local | |
3501 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
3502 | return FALSE; | |
3503 | ||
3504 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) | |
3505 | { | |
3506 | asection *s = htab->root.splt; | |
3507 | ||
3508 | /* Allocate room for the header. */ | |
3509 | if (s->size == 0) | |
3510 | { | |
3511 | if (info->shared) | |
3512 | s->size = 24; | |
3513 | else | |
3514 | s->size = 28; | |
3515 | } | |
3516 | ||
3517 | h->plt.offset = s->size; | |
3518 | ||
3519 | /* If this symbol is not defined in a regular file, and we are | |
3520 | not generating a shared library, then set the symbol to this | |
3521 | location in the .plt. This is required to make function | |
3522 | pointers compare as equal between the normal executable and | |
3523 | the shared library. */ | |
3524 | if (! info->shared | |
3525 | && !h->def_regular) | |
3526 | { | |
3527 | h->root.u.def.section = s; | |
3528 | h->root.u.def.value = h->plt.offset; | |
3529 | } | |
3530 | ||
3531 | /* Make room for this entry. */ | |
3532 | s->size += 12; | |
3533 | ||
3534 | /* We also need to make an entry in the .rela.plt section. */ | |
3535 | htab->root.srelplt->size += sizeof (Elf32_External_Rela); | |
3536 | ||
3537 | /* And the .got.plt section. */ | |
3538 | htab->root.sgotplt->size += 4; | |
3539 | } | |
3540 | else | |
3541 | { | |
3542 | h->plt.offset = (bfd_vma) -1; | |
3543 | h->needs_plt = 0; | |
3544 | } | |
3545 | } | |
3546 | else | |
3547 | { | |
3548 | h->plt.offset = (bfd_vma) -1; | |
3549 | h->needs_plt = 0; | |
3550 | } | |
3551 | ||
3552 | eh = (struct elf32_nios2_link_hash_entry *) h; | |
3553 | use_plt = (eh->got_types_used == CALL16_USED | |
3554 | && h->plt.offset != (bfd_vma) -1); | |
3555 | ||
3556 | if (h->got.refcount > 0) | |
3557 | { | |
3558 | asection *s; | |
3559 | bfd_boolean dyn; | |
3560 | int tls_type = eh->tls_type; | |
3561 | int indx; | |
3562 | ||
3563 | /* Make sure this symbol is output as a dynamic symbol. | |
3564 | Undefined weak syms won't yet be marked as dynamic. */ | |
3565 | if (h->dynindx == -1 | |
3566 | && !h->forced_local | |
3567 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
3568 | return FALSE; | |
3569 | ||
3570 | s = htab->root.sgot; | |
3571 | h->got.offset = s->size; | |
3572 | ||
3573 | if (tls_type == GOT_UNKNOWN) | |
3574 | abort (); | |
3575 | ||
3576 | if (tls_type == GOT_NORMAL) | |
3577 | /* Non-TLS symbols need one GOT slot. */ | |
3578 | s->size += 4; | |
3579 | else | |
3580 | { | |
3581 | if (tls_type & GOT_TLS_GD) | |
3582 | /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */ | |
3583 | s->size += 8; | |
3584 | if (tls_type & GOT_TLS_IE) | |
3585 | /* R_NIOS2_TLS_IE16 needs one GOT slot. */ | |
3586 | s->size += 4; | |
3587 | } | |
3588 | ||
3589 | dyn = htab->root.dynamic_sections_created; | |
3590 | ||
3591 | indx = 0; | |
3592 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
3593 | && (!info->shared | |
3594 | || !SYMBOL_REFERENCES_LOCAL (info, h))) | |
3595 | indx = h->dynindx; | |
3596 | ||
3597 | if (tls_type != GOT_NORMAL | |
3598 | && (info->shared || indx != 0) | |
3599 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3600 | || h->root.type != bfd_link_hash_undefweak)) | |
3601 | { | |
3602 | if (tls_type & GOT_TLS_IE) | |
3603 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
3604 | ||
3605 | if (tls_type & GOT_TLS_GD) | |
3606 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
3607 | ||
3608 | if ((tls_type & GOT_TLS_GD) && indx != 0) | |
3609 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
3610 | } | |
3611 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3612 | || h->root.type != bfd_link_hash_undefweak) | |
3613 | && !use_plt | |
3614 | && (info->shared | |
3615 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
3616 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
3617 | } | |
3618 | else | |
3619 | h->got.offset = (bfd_vma) -1; | |
3620 | ||
3621 | if (eh->dyn_relocs == NULL) | |
3622 | return TRUE; | |
3623 | ||
3624 | /* In the shared -Bsymbolic case, discard space allocated for | |
3625 | dynamic pc-relative relocs against symbols which turn out to be | |
3626 | defined in regular objects. For the normal shared case, discard | |
3627 | space for pc-relative relocs that have become local due to symbol | |
3628 | visibility changes. */ | |
3629 | ||
3630 | if (info->shared) | |
3631 | { | |
3632 | if (h->def_regular | |
3633 | && (h->forced_local || info->symbolic)) | |
3634 | { | |
3635 | struct elf32_nios2_dyn_relocs **pp; | |
3636 | ||
3637 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3638 | { | |
3639 | p->count -= p->pc_count; | |
3640 | p->pc_count = 0; | |
3641 | if (p->count == 0) | |
3642 | *pp = p->next; | |
3643 | else | |
3644 | pp = &p->next; | |
3645 | } | |
3646 | } | |
3647 | ||
3648 | /* Also discard relocs on undefined weak syms with non-default | |
3649 | visibility. */ | |
3650 | if (eh->dyn_relocs != NULL | |
3651 | && h->root.type == bfd_link_hash_undefweak) | |
3652 | { | |
3653 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
3654 | eh->dyn_relocs = NULL; | |
3655 | ||
3656 | /* Make sure undefined weak symbols are output as a dynamic | |
3657 | symbol in PIEs. */ | |
3658 | else if (h->dynindx == -1 | |
3659 | && !h->forced_local | |
3660 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
3661 | return FALSE; | |
3662 | } | |
3663 | } | |
3664 | else | |
3665 | { | |
3666 | /* For the non-shared case, discard space for relocs against | |
3667 | symbols which turn out to need copy relocs or are not | |
3668 | dynamic. */ | |
3669 | ||
3670 | if (!h->non_got_ref | |
3671 | && ((h->def_dynamic && !h->def_regular) | |
3672 | || (htab->root.dynamic_sections_created | |
3673 | && (h->root.type == bfd_link_hash_undefweak | |
3674 | || h->root.type == bfd_link_hash_undefined)))) | |
3675 | { | |
3676 | /* Make sure this symbol is output as a dynamic symbol. | |
3677 | Undefined weak syms won't yet be marked as dynamic. */ | |
3678 | if (h->dynindx == -1 | |
3679 | && !h->forced_local | |
3680 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
3681 | return FALSE; | |
3682 | ||
3683 | /* If that succeeded, we know we'll be keeping all the | |
3684 | relocs. */ | |
3685 | if (h->dynindx != -1) | |
3686 | goto keep; | |
3687 | } | |
3688 | ||
3689 | eh->dyn_relocs = NULL; | |
3690 | ||
3691 | keep: ; | |
3692 | } | |
3693 | ||
3694 | /* Finally, allocate space. */ | |
3695 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3696 | { | |
3697 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
3698 | sreloc->size += p->count * sizeof (Elf32_External_Rela); | |
3699 | } | |
3700 | ||
3701 | return TRUE; | |
3702 | } | |
3703 | ||
3704 | /* Implement elf_backend_size_dynamic_sections: | |
3705 | Set the sizes of the dynamic sections. */ | |
3706 | static bfd_boolean | |
3707 | nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
3708 | struct bfd_link_info *info) | |
3709 | { | |
3710 | bfd *dynobj; | |
3711 | asection *s; | |
3712 | bfd_boolean plt; | |
3713 | bfd_boolean got; | |
3714 | bfd_boolean relocs; | |
3715 | bfd *ibfd; | |
3716 | struct elf32_nios2_link_hash_table *htab; | |
3717 | ||
3718 | htab = elf32_nios2_hash_table (info); | |
3719 | dynobj = elf_hash_table (info)->dynobj; | |
3720 | BFD_ASSERT (dynobj != NULL); | |
3721 | ||
3722 | htab->res_n_size = 0; | |
3723 | if (elf_hash_table (info)->dynamic_sections_created) | |
3724 | { | |
3725 | /* Set the contents of the .interp section to the interpreter. */ | |
3726 | if (info->executable) | |
3727 | { | |
3728 | s = bfd_get_linker_section (dynobj, ".interp"); | |
3729 | BFD_ASSERT (s != NULL); | |
3730 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
3731 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
3732 | } | |
3733 | } | |
3734 | else | |
3735 | { | |
3736 | /* We may have created entries in the .rela.got section. | |
3737 | However, if we are not creating the dynamic sections, we will | |
3738 | not actually use these entries. Reset the size of .rela.got, | |
3739 | which will cause it to get stripped from the output file | |
3740 | below. */ | |
3741 | s = htab->root.srelgot; | |
3742 | if (s != NULL) | |
3743 | s->size = 0; | |
3744 | } | |
3745 | ||
3746 | /* Set up .got offsets for local syms, and space for local dynamic | |
3747 | relocs. */ | |
3748 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
3749 | { | |
3750 | bfd_signed_vma *local_got; | |
3751 | bfd_signed_vma *end_local_got; | |
3752 | char *local_tls_type; | |
3753 | bfd_size_type locsymcount; | |
3754 | Elf_Internal_Shdr *symtab_hdr; | |
3755 | asection *srel; | |
3756 | ||
3757 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
3758 | continue; | |
3759 | ||
3760 | for (s = ibfd->sections; s != NULL; s = s->next) | |
3761 | { | |
3762 | struct elf32_nios2_dyn_relocs *p; | |
3763 | ||
3764 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) | |
3765 | { | |
3766 | if (!bfd_is_abs_section (p->sec) | |
3767 | && bfd_is_abs_section (p->sec->output_section)) | |
3768 | { | |
3769 | /* Input section has been discarded, either because | |
3770 | it is a copy of a linkonce section or due to | |
3771 | linker script /DISCARD/, so we'll be discarding | |
3772 | the relocs too. */ | |
3773 | } | |
3774 | else if (p->count != 0) | |
3775 | { | |
3776 | srel = elf_section_data (p->sec)->sreloc; | |
3777 | srel->size += p->count * sizeof (Elf32_External_Rela); | |
3778 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
3779 | info->flags |= DF_TEXTREL; | |
3780 | } | |
3781 | } | |
3782 | } | |
3783 | ||
3784 | local_got = elf_local_got_refcounts (ibfd); | |
3785 | if (!local_got) | |
3786 | continue; | |
3787 | ||
3788 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
3789 | locsymcount = symtab_hdr->sh_info; | |
3790 | end_local_got = local_got + locsymcount; | |
3791 | local_tls_type = elf32_nios2_local_got_tls_type (ibfd); | |
3792 | s = htab->root.sgot; | |
3793 | srel = htab->root.srelgot; | |
3794 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) | |
3795 | { | |
3796 | if (*local_got > 0) | |
3797 | { | |
3798 | *local_got = s->size; | |
3799 | if (*local_tls_type & GOT_TLS_GD) | |
3800 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ | |
3801 | s->size += 8; | |
3802 | if (*local_tls_type & GOT_TLS_IE) | |
3803 | s->size += 4; | |
3804 | if (*local_tls_type == GOT_NORMAL) | |
3805 | s->size += 4; | |
3806 | ||
3807 | if (info->shared || *local_tls_type == GOT_TLS_GD) | |
3808 | srel->size += sizeof (Elf32_External_Rela); | |
3809 | } | |
3810 | else | |
3811 | *local_got = (bfd_vma) -1; | |
3812 | } | |
3813 | } | |
3814 | ||
3815 | if (htab->tls_ldm_got.refcount > 0) | |
3816 | { | |
3817 | /* Allocate two GOT entries and one dynamic relocation (if necessary) | |
3818 | for R_NIOS2_TLS_LDM16 relocations. */ | |
3819 | htab->tls_ldm_got.offset = htab->root.sgot->size; | |
3820 | htab->root.sgot->size += 8; | |
3821 | if (info->shared) | |
3822 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); | |
3823 | } | |
3824 | else | |
3825 | htab->tls_ldm_got.offset = -1; | |
3826 | ||
3827 | /* Allocate global sym .plt and .got entries, and space for global | |
3828 | sym dynamic relocs. */ | |
3829 | elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); | |
3830 | ||
3831 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
3832 | determined the sizes of the various dynamic sections. Allocate | |
3833 | memory for them. */ | |
3834 | plt = FALSE; | |
3835 | got = FALSE; | |
3836 | relocs = FALSE; | |
3837 | for (s = dynobj->sections; s != NULL; s = s->next) | |
3838 | { | |
3839 | const char *name; | |
3840 | ||
3841 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3842 | continue; | |
3843 | ||
3844 | /* It's OK to base decisions on the section name, because none | |
3845 | of the dynobj section names depend upon the input files. */ | |
3846 | name = bfd_get_section_name (dynobj, s); | |
3847 | ||
3848 | if (strcmp (name, ".plt") == 0) | |
3849 | { | |
3850 | /* Remember whether there is a PLT. */ | |
3851 | plt = s->size != 0; | |
3852 | ||
3853 | /* Correct for the number of res_N branches. */ | |
3854 | if (plt && !info->shared) | |
3855 | { | |
3856 | htab->res_n_size = (s->size-28) / 3; | |
3857 | s->size += htab->res_n_size; | |
3858 | } | |
3859 | } | |
3860 | else if (CONST_STRNEQ (name, ".rela")) | |
3861 | { | |
3862 | if (s->size != 0) | |
3863 | { | |
3864 | relocs = TRUE; | |
3865 | ||
3866 | /* We use the reloc_count field as a counter if we need | |
3867 | to copy relocs into the output file. */ | |
3868 | s->reloc_count = 0; | |
3869 | } | |
3870 | } | |
3871 | else if (CONST_STRNEQ (name, ".got")) | |
3872 | got = s->size != 0; | |
3873 | else if (strcmp (name, ".dynbss") != 0) | |
3874 | /* It's not one of our sections, so don't allocate space. */ | |
3875 | continue; | |
3876 | ||
3877 | if (s->size == 0) | |
3878 | { | |
3879 | /* If we don't need this section, strip it from the | |
3880 | output file. This is mostly to handle .rela.bss and | |
3881 | .rela.plt. We must create both sections in | |
3882 | create_dynamic_sections, because they must be created | |
3883 | before the linker maps input sections to output | |
3884 | sections. The linker does that before | |
3885 | adjust_dynamic_symbol is called, and it is that | |
3886 | function which decides whether anything needs to go | |
3887 | into these sections. */ | |
3888 | s->flags |= SEC_EXCLUDE; | |
3889 | continue; | |
3890 | } | |
3891 | ||
3892 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
3893 | continue; | |
3894 | ||
3895 | /* Allocate memory for the section contents. */ | |
3896 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. | |
3897 | Unused entries should be reclaimed before the section's contents | |
3898 | are written out, but at the moment this does not happen. Thus in | |
3899 | order to prevent writing out garbage, we initialize the section's | |
3900 | contents to zero. */ | |
3901 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
3902 | if (s->contents == NULL) | |
3903 | return FALSE; | |
3904 | } | |
3905 | ||
3906 | /* Adjust dynamic symbols that point to the plt to account for the | |
3907 | now-known number of resN slots. */ | |
3908 | if (htab->res_n_size) | |
3909 | elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info); | |
3910 | ||
3911 | if (elf_hash_table (info)->dynamic_sections_created) | |
3912 | { | |
3913 | /* Add some entries to the .dynamic section. We fill in the | |
3914 | values later, in elf_nios2_finish_dynamic_sections, but we | |
3915 | must add the entries now so that we get the correct size for | |
3916 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3917 | dynamic linker and used by the debugger. */ | |
3918 | #define add_dynamic_entry(TAG, VAL) \ | |
3919 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
3920 | ||
3921 | if (!info->shared && !add_dynamic_entry (DT_DEBUG, 0)) | |
3922 | return FALSE; | |
3923 | ||
3924 | if (got && !add_dynamic_entry (DT_PLTGOT, 0)) | |
3925 | return FALSE; | |
3926 | ||
3927 | if (plt | |
3928 | && (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3929 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3930 | || !add_dynamic_entry (DT_JMPREL, 0))) | |
3931 | return FALSE; | |
3932 | ||
3933 | if (relocs | |
3934 | && (!add_dynamic_entry (DT_RELA, 0) | |
3935 | || !add_dynamic_entry (DT_RELASZ, 0) | |
3936 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))) | |
3937 | return FALSE; | |
3938 | ||
3939 | if (!info->shared && !add_dynamic_entry (DT_NIOS2_GP, 0)) | |
3940 | return FALSE; | |
3941 | ||
3942 | if ((info->flags & DF_TEXTREL) != 0 | |
3943 | && !add_dynamic_entry (DT_TEXTREL, 0)) | |
3944 | return FALSE; | |
3945 | } | |
3946 | #undef add_dynamic_entry | |
3947 | ||
3948 | return TRUE; | |
3949 | } | |
3950 | ||
3951 | /* Implement bfd_elf32_bfd_link_hash_table_create. */ | |
3952 | static struct bfd_link_hash_table * | |
3953 | nios2_elf32_link_hash_table_create (bfd *abfd) | |
3954 | { | |
3955 | struct elf32_nios2_link_hash_table *ret; | |
3956 | bfd_size_type amt = sizeof (struct elf32_nios2_link_hash_table); | |
3957 | ||
7bf52ea2 | 3958 | ret = bfd_zmalloc (amt); |
36591ba1 SL |
3959 | if (ret == NULL) |
3960 | return NULL; | |
3961 | ||
3962 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
3963 | link_hash_newfunc, | |
3964 | sizeof (struct | |
3965 | elf32_nios2_link_hash_entry), | |
3966 | NIOS2_ELF_DATA)) | |
3967 | { | |
3968 | free (ret); | |
3969 | return NULL; | |
3970 | } | |
3971 | ||
36591ba1 SL |
3972 | return &ret->root.root; |
3973 | } | |
3974 | ||
3975 | /* Implement elf_backend_reloc_type_class. */ | |
3976 | static enum elf_reloc_type_class | |
7e612e98 AM |
3977 | nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
3978 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
3979 | const Elf_Internal_Rela *rela) | |
36591ba1 SL |
3980 | { |
3981 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3982 | { | |
3983 | case R_NIOS2_RELATIVE: | |
3984 | return reloc_class_relative; | |
3985 | case R_NIOS2_JUMP_SLOT: | |
3986 | return reloc_class_plt; | |
3987 | case R_NIOS2_COPY: | |
3988 | return reloc_class_copy; | |
3989 | default: | |
3990 | return reloc_class_normal; | |
3991 | } | |
3992 | } | |
3993 | ||
3994 | /* Return 1 if target is one of ours. */ | |
3995 | static bfd_boolean | |
3996 | is_nios2_elf_target (const struct bfd_target *targ) | |
3997 | { | |
3998 | return (targ == &bfd_elf32_littlenios2_vec | |
3999 | || targ == &bfd_elf32_bignios2_vec); | |
4000 | } | |
4001 | ||
4002 | /* Implement elf_backend_add_symbol_hook. | |
4003 | This hook is called by the linker when adding symbols from an object | |
4004 | file. We use it to put .comm items in .sbss, and not .bss. */ | |
4005 | static bfd_boolean | |
4006 | nios2_elf_add_symbol_hook (bfd *abfd, | |
4007 | struct bfd_link_info *info, | |
4008 | Elf_Internal_Sym *sym, | |
4009 | const char **namep ATTRIBUTE_UNUSED, | |
4010 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4011 | asection **secp, | |
4012 | bfd_vma *valp) | |
4013 | { | |
4014 | bfd *dynobj; | |
4015 | ||
4016 | if (sym->st_shndx == SHN_COMMON | |
4017 | && !info->relocatable | |
4018 | && sym->st_size <= elf_gp_size (abfd) | |
4019 | && is_nios2_elf_target (info->output_bfd->xvec)) | |
4020 | { | |
4021 | /* Common symbols less than or equal to -G nn bytes are automatically | |
4022 | put into .sbss. */ | |
4023 | struct elf32_nios2_link_hash_table *htab; | |
4024 | ||
4025 | htab = elf32_nios2_hash_table (info); | |
4026 | if (htab->sbss == NULL) | |
4027 | { | |
4028 | flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; | |
4029 | ||
4030 | dynobj = elf_hash_table (info)->dynobj; | |
4031 | if (!dynobj) | |
4032 | dynobj = abfd; | |
4033 | ||
4034 | htab->sbss = bfd_make_section_anyway_with_flags (dynobj, ".sbss", | |
4035 | flags); | |
4036 | if (htab->sbss == NULL) | |
4037 | return FALSE; | |
4038 | } | |
4039 | ||
4040 | *secp = htab->sbss; | |
4041 | *valp = sym->st_size; | |
4042 | } | |
4043 | ||
4044 | return TRUE; | |
4045 | } | |
4046 | ||
4047 | /* Implement elf_backend_can_make_relative_eh_frame: | |
4048 | Decide whether to attempt to turn absptr or lsda encodings in | |
4049 | shared libraries into pcrel within the given input section. */ | |
4050 | static bfd_boolean | |
4051 | nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED, | |
4052 | struct bfd_link_info *info | |
4053 | ATTRIBUTE_UNUSED, | |
4054 | asection *eh_frame_section | |
4055 | ATTRIBUTE_UNUSED) | |
4056 | { | |
4057 | /* We can't use PC-relative encodings in the .eh_frame section. */ | |
4058 | return FALSE; | |
4059 | } | |
4060 | ||
4061 | /* Implement elf_backend_special_sections. */ | |
4062 | const struct bfd_elf_special_section elf32_nios2_special_sections[] = | |
4063 | { | |
4064 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, | |
4065 | SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, | |
4066 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, | |
4067 | SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, | |
4068 | { NULL, 0, 0, 0, 0 } | |
4069 | }; | |
4070 | ||
4071 | #define ELF_ARCH bfd_arch_nios2 | |
4072 | #define ELF_TARGET_ID NIOS2_ELF_DATA | |
4073 | #define ELF_MACHINE_CODE EM_ALTERA_NIOS2 | |
4074 | ||
4075 | /* The Nios II MMU uses a 4K page size. */ | |
4076 | ||
4077 | #define ELF_MAXPAGESIZE 0x1000 | |
4078 | ||
4079 | #define bfd_elf32_bfd_link_hash_table_create \ | |
4080 | nios2_elf32_link_hash_table_create | |
4081 | ||
4082 | /* Relocation table lookup macros. */ | |
4083 | ||
4084 | #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup | |
4085 | #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup | |
4086 | ||
4087 | /* JUMP_TABLE_LINK macros. */ | |
4088 | ||
4089 | /* elf_info_to_howto (using RELA relocations). */ | |
4090 | ||
4091 | #define elf_info_to_howto nios2_elf32_info_to_howto | |
4092 | ||
4093 | /* elf backend functions. */ | |
4094 | ||
4095 | #define elf_backend_can_gc_sections 1 | |
4096 | #define elf_backend_can_refcount 1 | |
4097 | #define elf_backend_plt_readonly 1 | |
4098 | #define elf_backend_want_got_plt 1 | |
4099 | #define elf_backend_rela_normal 1 | |
4100 | ||
4101 | #define elf_backend_relocate_section nios2_elf32_relocate_section | |
4102 | #define elf_backend_section_flags nios2_elf32_section_flags | |
4103 | #define elf_backend_fake_sections nios2_elf32_fake_sections | |
4104 | #define elf_backend_check_relocs nios2_elf32_check_relocs | |
4105 | ||
4106 | #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook | |
4107 | #define elf_backend_gc_sweep_hook nios2_elf32_gc_sweep_hook | |
4108 | #define elf_backend_create_dynamic_sections \ | |
4109 | nios2_elf32_create_dynamic_sections | |
4110 | #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol | |
4111 | #define elf_backend_finish_dynamic_sections \ | |
4112 | nios2_elf32_finish_dynamic_sections | |
4113 | #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol | |
4114 | #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class | |
4115 | #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections | |
4116 | #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook | |
4117 | #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol | |
4118 | ||
4119 | #define elf_backend_grok_prstatus nios2_grok_prstatus | |
4120 | #define elf_backend_grok_psinfo nios2_grok_psinfo | |
4121 | ||
4122 | #undef elf_backend_can_make_relative_eh_frame | |
4123 | #define elf_backend_can_make_relative_eh_frame \ | |
4124 | nios2_elf32_can_make_relative_eh_frame | |
4125 | ||
4126 | #define elf_backend_special_sections elf32_nios2_special_sections | |
4127 | ||
4128 | #define TARGET_LITTLE_SYM bfd_elf32_littlenios2_vec | |
4129 | #define TARGET_LITTLE_NAME "elf32-littlenios2" | |
4130 | #define TARGET_BIG_SYM bfd_elf32_bignios2_vec | |
4131 | #define TARGET_BIG_NAME "elf32-bignios2" | |
4132 | ||
4133 | #define elf_backend_got_header_size 12 | |
4134 | ||
4135 | #include "elf32-target.h" |