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a3c62988 1/* Meta support for 32-bit ELF
2571583a 2 Copyright (C) 2013-2017 Free Software Foundation, Inc.
a3c62988
NC		 3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22#include "sysdep.h"
23#include "bfd.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
26#include "elf32-metag.h"
27#include "elf/metag.h"
28
29#define GOT_ENTRY_SIZE 4
30#define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32/* ABI version:
33 0 - original
34 1 - with GOT offset */
35#define METAG_ELF_ABI_VERSION 1
36
37static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73/* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93#define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95static reloc_howto_type elf_metag_howto_table[] =
96{
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
6346d5ca 145 3, /* size (0 = byte, 1 = short, 2 = long) */
a3c62988
NC		 146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681};
682
683#define BRANCH_BITS 19
684
685/* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694#define GOT_REG_OFFSET 0x2000
695
696struct metag_reloc_map
697{
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700};
701
702static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746enum elf_metag_stub_type
747{
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751};
752
753struct elf_metag_stub_hash_entry
754{
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780};
781
782struct elf_metag_link_hash_entry
783{
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811};
812
813struct elf_metag_link_hash_table
814{
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
7292b3ac 841 unsigned int top_index;
a3c62988
NC		 842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
a3c62988
NC		 845 /* Small local sym cache. */
846 struct sym_cache sym_cache;
847
848 /* Data for LDM relocations. */
849 union
850 {
851 bfd_signed_vma refcount;
852 bfd_vma offset;
853 } tls_ldm_got;
854};
855
856/* Return the base vma address which should be subtracted from the
857 real address when resolving a dtpoff relocation. This is PT_TLS
858 segment p_vaddr. */
859static bfd_vma
860dtpoff_base (struct bfd_link_info *info)
861{
862 /* If tls_sec is NULL, we should have signalled an error already. */
863 if (elf_hash_table (info)->tls_sec == NULL)
864 return 0;
865 return elf_hash_table (info)->tls_sec->vma;
866}
867
868/* Return the relocation value for R_METAG_TLS_IE */
869static bfd_vma
870tpoff (struct bfd_link_info *info, bfd_vma address)
871{
872 /* If tls_sec is NULL, we should have signalled an error already. */
873 if (elf_hash_table (info)->tls_sec == NULL)
874 return 0;
875 /* METAG TLS ABI is variant I and static TLS blocks start just after
876 tcbhead structure which has 2 pointer fields. */
877 return (address - elf_hash_table (info)->tls_sec->vma
878 + align_power ((bfd_vma) 8,
879 elf_hash_table (info)->tls_sec->alignment_power));
880}
881
882static void
883metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
884 arelent *cache_ptr,
885 Elf_Internal_Rela *dst)
886{
887 unsigned int r_type;
888
889 r_type = ELF32_R_TYPE (dst->r_info);
5860e3f8
NC		 890 if (r_type >= (unsigned int) R_METAG_MAX)
891 {
695344c0 892 /* xgettext:c-format */
64d29018 893 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
5860e3f8
NC		 894 r_type = 0;
895 }
a3c62988
NC		 896 cache_ptr->howto = & elf_metag_howto_table [r_type];
897}
898
899static reloc_howto_type *
900metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
901 bfd_reloc_code_real_type code)
902{
903 unsigned int i;
904
905 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
906 if (metag_reloc_map [i].bfd_reloc_val == code)
907 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
908
909 return NULL;
910}
911
912static reloc_howto_type *
913metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
914 const char *r_name)
915{
916 unsigned int i;
917
918 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
919 if (elf_metag_howto_table[i].name != NULL
920 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
921 return &elf_metag_howto_table[i];
922
923 return NULL;
924}
925
926/* Various hash macros and functions. */
927#define metag_link_hash_table(p) \
928 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
929 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
930
931#define metag_elf_hash_entry(ent) \
932 ((struct elf_metag_link_hash_entry *)(ent))
933
934#define metag_stub_hash_entry(ent) \
935 ((struct elf_metag_stub_hash_entry *)(ent))
936
937#define metag_stub_hash_lookup(table, string, create, copy) \
938 ((struct elf_metag_stub_hash_entry *) \
939 bfd_hash_lookup ((table), (string), (create), (copy)))
940
941#define metag_elf_local_got_tls_type(abfd) \
942 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
943
944/* Assorted hash table functions. */
945
946/* Initialize an entry in the stub hash table. */
947
948static struct bfd_hash_entry *
949stub_hash_newfunc (struct bfd_hash_entry *entry,
950 struct bfd_hash_table *table,
951 const char *string)
952{
953 /* Allocate the structure if it has not already been allocated by a
954 subclass. */
955 if (entry == NULL)
956 {
957 entry = bfd_hash_allocate (table,
958 sizeof (struct elf_metag_stub_hash_entry));
959 if (entry == NULL)
960 return entry;
961 }
962
963 /* Call the allocation method of the superclass. */
964 entry = bfd_hash_newfunc (entry, table, string);
965 if (entry != NULL)
966 {
967 struct elf_metag_stub_hash_entry *hsh;
968
969 /* Initialize the local fields. */
970 hsh = (struct elf_metag_stub_hash_entry *) entry;
971 hsh->stub_sec = NULL;
972 hsh->stub_offset = 0;
973 hsh->target_value = 0;
974 hsh->target_section = NULL;
975 hsh->stub_type = metag_stub_long_branch;
976 hsh->hh = NULL;
977 hsh->id_sec = NULL;
978 }
979
980 return entry;
981}
982
983/* Initialize an entry in the link hash table. */
984
985static struct bfd_hash_entry *
986metag_link_hash_newfunc (struct bfd_hash_entry *entry,
987 struct bfd_hash_table *table,
988 const char *string)
989{
990 /* Allocate the structure if it has not already been allocated by a
991 subclass. */
992 if (entry == NULL)
993 {
994 entry = bfd_hash_allocate (table,
995 sizeof (struct elf_metag_link_hash_entry));
996 if (entry == NULL)
997 return entry;
998 }
999
1000 /* Call the allocation method of the superclass. */
1001 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1002 if (entry != NULL)
1003 {
1004 struct elf_metag_link_hash_entry *hh;
1005
1006 /* Initialize the local fields. */
1007 hh = (struct elf_metag_link_hash_entry *) entry;
1008 hh->hsh_cache = NULL;
1009 hh->dyn_relocs = NULL;
1010 hh->tls_type = GOT_UNKNOWN;
1011 }
1012
1013 return entry;
1014}
1015
68faa637
AM		 1016/* Free the derived linker hash table. */
1017
1018static void
d495ab0d 1019elf_metag_link_hash_table_free (bfd *obfd)
68faa637
AM		 1020{
1021 struct elf_metag_link_hash_table *htab
d495ab0d 1022 = (struct elf_metag_link_hash_table *) obfd->link.hash;
68faa637
AM		 1023
1024 bfd_hash_table_free (&htab->bstab);
d495ab0d 1025 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1026}
1027
a3c62988
NC		 1028/* Create the derived linker hash table. The Meta ELF port uses the derived
1029 hash table to keep information specific to the Meta ELF linker (without
1030 using static variables). */
1031
1032static struct bfd_link_hash_table *
1033elf_metag_link_hash_table_create (bfd *abfd)
1034{
1035 struct elf_metag_link_hash_table *htab;
1036 bfd_size_type amt = sizeof (*htab);
1037
7bf52ea2 1038 htab = bfd_zmalloc (amt);
a3c62988
NC		 1039 if (htab == NULL)
1040 return NULL;
1041
1042 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1043 metag_link_hash_newfunc,
1044 sizeof (struct elf_metag_link_hash_entry),
1045 METAG_ELF_DATA))
1046 {
1047 free (htab);
1048 return NULL;
1049 }
1050
1051 /* Init the stub hash table too. */
1052 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1053 sizeof (struct elf_metag_stub_hash_entry)))
d495ab0d
AM		 1054 {
1055 _bfd_elf_link_hash_table_free (abfd);
1056 return NULL;
1057 }
1058 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
a3c62988 1059
a3c62988
NC		 1060 return &htab->etab.root;
1061}
1062
a3c62988
NC		 1063/* Section name for stubs is the associated section name plus this
1064 string. */
1065#define STUB_SUFFIX ".stub"
1066
1067/* Build a name for an entry in the stub hash table. */
1068
1069static char *
1070metag_stub_name (const asection *input_section,
1071 const asection *sym_sec,
1072 const struct elf_metag_link_hash_entry *hh,
1073 const Elf_Internal_Rela *rel)
1074{
1075 char *stub_name;
1076 bfd_size_type len;
1077
1078 if (hh)
1079 {
1080 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1081 stub_name = bfd_malloc (len);
1082 if (stub_name != NULL)
1083 {
1084 sprintf (stub_name, "%08x_%s+%x",
1085 input_section->id & 0xffffffff,
1086 hh->eh.root.root.string,
1087 (int) rel->r_addend & 0xffffffff);
1088 }
1089 }
1090 else
1091 {
1092 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1093 stub_name = bfd_malloc (len);
1094 if (stub_name != NULL)
1095 {
1096 sprintf (stub_name, "%08x_%x:%x+%x",
1097 input_section->id & 0xffffffff,
1098 sym_sec->id & 0xffffffff,
1099 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1100 (int) rel->r_addend & 0xffffffff);
1101 }
1102 }
1103 return stub_name;
1104}
1105
1106/* Look up an entry in the stub hash. Stub entries are cached because
1107 creating the stub name takes a bit of time. */
1108
1109static struct elf_metag_stub_hash_entry *
1110metag_get_stub_entry (const asection *input_section,
1111 const asection *sym_sec,
1112 struct elf_metag_link_hash_entry *hh,
1113 const Elf_Internal_Rela *rel,
1114 struct elf_metag_link_hash_table *htab)
1115{
1116 struct elf_metag_stub_hash_entry *hsh;
1117 const asection *id_sec;
1118
1119 /* If this input section is part of a group of sections sharing one
1120 stub section, then use the id of the first section in the group.
1121 Stub names need to include a section id, as there may well be
1122 more than one stub used to reach say, printf, and we need to
1123 distinguish between them. */
1124 id_sec = htab->stub_group[input_section->id].link_sec;
1125
1126 if (hh != NULL && hh->hsh_cache != NULL
1127 && hh->hsh_cache->hh == hh
1128 && hh->hsh_cache->id_sec == id_sec)
1129 {
1130 hsh = hh->hsh_cache;
1131 }
1132 else
1133 {
1134 char *stub_name;
1135
1136 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1137 if (stub_name == NULL)
1138 return NULL;
1139
1140 hsh = metag_stub_hash_lookup (&htab->bstab,
1141 stub_name, FALSE, FALSE);
1142
1143 if (hh != NULL)
1144 hh->hsh_cache = hsh;
1145
1146 free (stub_name);
1147 }
1148
1149 return hsh;
1150}
1151
1152/* Add a new stub entry to the stub hash. Not all fields of the new
1153 stub entry are initialised. */
1154
1155static struct elf_metag_stub_hash_entry *
1156metag_add_stub (const char *stub_name,
1157 asection *section,
1158 struct elf_metag_link_hash_table *htab)
1159{
1160 asection *link_sec;
1161 asection *stub_sec;
1162 struct elf_metag_stub_hash_entry *hsh;
1163
1164 link_sec = htab->stub_group[section->id].link_sec;
1165 stub_sec = htab->stub_group[section->id].stub_sec;
1166 if (stub_sec == NULL)
1167 {
1168 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1169 if (stub_sec == NULL)
1170 {
1171 size_t namelen;
1172 bfd_size_type len;
1173 char *s_name;
1174
1175 namelen = strlen (link_sec->name);
1176 len = namelen + sizeof (STUB_SUFFIX);
1177 s_name = bfd_alloc (htab->stub_bfd, len);
1178 if (s_name == NULL)
1179 return NULL;
1180
1181 memcpy (s_name, link_sec->name, namelen);
1182 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1183
1184 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1185 if (stub_sec == NULL)
1186 return NULL;
1187 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1188 }
1189 htab->stub_group[section->id].stub_sec = stub_sec;
1190 }
1191
1192 /* Enter this entry into the linker stub hash table. */
1193 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1194 TRUE, FALSE);
1195 if (hsh == NULL)
1196 {
695344c0 1197 /* xgettext:c-format */
4eca0228
AM		 1198 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1199 section->owner, stub_name);
a3c62988
NC		 1200 return NULL;
1201 }
1202
1203 hsh->stub_sec = stub_sec;
1204 hsh->stub_offset = 0;
1205 hsh->id_sec = link_sec;
1206 return hsh;
1207}
1208
1209/* Check a signed integer value can be represented in the given number
1210 of bits. */
1211
1212static bfd_boolean
1213within_signed_range (int value, unsigned int bits)
1214{
1215 int min_val = -(1 << (bits - 1));
1216 int max_val = (1 << (bits - 1)) - 1;
1217 return (value <= max_val) && (value >= min_val);
1218}
1219
1220/* Perform a relocation as part of a final link. */
1221
1222static bfd_reloc_status_type
1223metag_final_link_relocate (reloc_howto_type *howto,
1224 bfd *input_bfd,
1225 asection *input_section,
1226 bfd_byte *contents,
1227 Elf_Internal_Rela *rel,
1228 bfd_vma relocation,
1229 struct elf_metag_link_hash_entry *hh,
1230 struct elf_metag_link_hash_table *htab,
1231 asection *sym_sec)
1232{
1233 bfd_reloc_status_type r = bfd_reloc_ok;
1234 bfd_byte *hit_data = contents + rel->r_offset;
1235 int opcode, op_shift, op_extended, l1, l2;
1236 bfd_signed_vma srel, addend = rel->r_addend;
1237 struct elf_metag_stub_hash_entry *hsh = NULL;
1238 bfd_vma location;
1239
1240 /* Find out where we are and where we're going. */
1241 location = (rel->r_offset +
1242 input_section->output_offset +
1243 input_section->output_section->vma);
1244
1245 switch (howto->type)
1246 {
1247 case R_METAG_RELBRANCH:
1248 case R_METAG_RELBRANCH_PLT:
1249 /* Make it a pc relative offset. */
1250 relocation -= location;
1251 break;
1252 case R_METAG_TLS_GD:
1253 case R_METAG_TLS_IE:
1254 relocation -= elf_gp (input_section->output_section->owner);
1255 break;
1256 default:
1257 break;
1258 }
1259
1260 switch (howto->type)
1261 {
1262 case R_METAG_RELBRANCH_PLT:
1263 case R_METAG_RELBRANCH:
1264 opcode = bfd_get_32 (input_bfd, hit_data);
1265
1266 srel = (bfd_signed_vma) relocation;
1267 srel += addend;
1268
1269 /* If the branch is out of reach, then redirect the
1270 call to the local stub for this function. */
1271 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1272 (srel < - (1 << (BRANCH_BITS + 1))))
1273 {
1274 if (sym_sec == NULL)
1275 break;
1276
1277 hsh = metag_get_stub_entry (input_section, sym_sec,
1278 hh, rel, htab);
1279 if (hsh == NULL)
1280 return bfd_reloc_undefined;
1281
1282 /* Munge up the value and addend so that we call the stub
1283 rather than the procedure directly. */
1284 srel = (hsh->stub_offset
1285 + hsh->stub_sec->output_offset
1286 + hsh->stub_sec->output_section->vma);
1287 srel -= location;
1288 }
1289
1290 srel = srel >> 2;
1291
1292 if (!within_signed_range (srel, BRANCH_BITS))
1293 {
1294 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1295 srel = 0;
1296 else
1297 return bfd_reloc_overflow;
1298 }
1299
1300 opcode &= ~(0x7ffff << 5);
1301 opcode |= ((srel & 0x7ffff) << 5);
1302
1303 bfd_put_32 (input_bfd, opcode, hit_data);
1304 break;
1305 case R_METAG_GETSETOFF:
1306 case R_METAG_GETSET_GOT:
1307 case R_METAG_GETSET_GOTOFF:
1308 opcode = bfd_get_32 (input_bfd, hit_data);
1309
1310 srel = (bfd_signed_vma) relocation;
1311 srel += addend;
1312
1313 /* Is this a standard or extended GET/SET? */
1314 if ((opcode & 0xf0000000) == 0xa0000000)
1315 {
1316 /* Extended GET/SET. */
1317 l1 = opcode & 0x2;
1318 l2 = opcode & 0x4;
1319 op_extended = 1;
1320 }
1321 else
1322 {
1323 /* Standard GET/SET. */
1324 l1 = opcode & 0x01000000;
1325 l2 = opcode & 0x04000000;
1326 op_extended = 0;
1327 }
1328
1329 /* Calculate the width of the GET/SET and how much we need to
1330 shift the result by. */
1331 if (l2)
1332 if (l1)
1333 op_shift = 3;
1334 else
1335 op_shift = 2;
1336 else
1337 if (l1)
1338 op_shift = 1;
1339 else
1340 op_shift = 0;
1341
1342 /* GET/SET offsets are scaled by the width of the transfer. */
1343 srel = srel >> op_shift;
1344
1345 /* Extended GET/SET has signed 12 bits of offset, standard has
1346 signed 6 bits. */
1347 if (op_extended)
1348 {
1349 if (!within_signed_range (srel, 12))
1350 {
1351 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1352 srel = 0;
1353 else
1354 return bfd_reloc_overflow;
1355 }
1356 opcode &= ~(0xfff << 7);
1357 opcode |= ((srel & 0xfff) << 7);
1358 }
1359 else
1360 {
1361 if (!within_signed_range (srel, 5))
1362 {
1363 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1364 srel = 0;
1365 else
1366 return bfd_reloc_overflow;
1367 }
1368 opcode &= ~(0x3f << 8);
1369 opcode |= ((srel & 0x3f) << 8);
1370 }
1371
1372 bfd_put_32 (input_bfd, opcode, hit_data);
1373 break;
1374 case R_METAG_TLS_GD:
1375 case R_METAG_TLS_LDM:
1376 opcode = bfd_get_32 (input_bfd, hit_data);
1377
1378 if ((bfd_signed_vma)relocation < 0)
1379 {
1380 /* sign extend immediate */
1381 if ((opcode & 0xf2000001) == 0x02000000)
1382 {
1383 /* ADD De.e,Dx.r,#I16 */
1384 /* set SE bit */
1385 opcode |= (1 << 1);
1386 } else
1387 return bfd_reloc_overflow;
1388 }
1389
1390 bfd_put_32 (input_bfd, opcode, hit_data);
1391
1392 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1393 contents, rel->r_offset,
1394 relocation, rel->r_addend);
1395 break;
1396 default:
1397 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1398 contents, rel->r_offset,
1399 relocation, rel->r_addend);
1400 }
1401
1402 return r;
1403}
1404
1405/* This is defined because R_METAG_NONE != 0...
1406 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1407#define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1408 rel, relend, howto, contents) \
1409 { \
1410 _bfd_clear_contents (howto, input_bfd, input_section, \
1411 contents + rel->r_offset); \
1412 \
0e1862bb 1413 if (bfd_link_relocatable (info) \
a3c62988
NC		 1414 && (input_section->flags & SEC_DEBUGGING)) \
1415 { \
1416 /* Only remove relocations in debug sections since other \
1417 sections may require relocations. */ \
1418 Elf_Internal_Shdr *rel_hdr; \
1419 \
1420 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1421 \
1422 /* Avoid empty output section. */ \
1423 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1424 { \
1425 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1426 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1427 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1428 \
1429 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1430 \
1431 input_section->reloc_count--; \
1432 relend--; \
1433 rel--; \
1434 continue; \
1435 } \
1436 } \
1437 \
1438 rel->r_info = R_METAG_NONE; \
1439 rel->r_addend = 0; \
1440 continue; \
1441 }
1442
1443/* Relocate a META ELF section.
1444
1445The RELOCATE_SECTION function is called by the new ELF backend linker
1446to handle the relocations for a section.
1447
1448The relocs are always passed as Rela structures; if the section
1449actually uses Rel structures, the r_addend field will always be
1450zero.
1451
1452This function is responsible for adjusting the section contents as
1453necessary, and (if using Rela relocs and generating a relocatable
1454output file) adjusting the reloc addend as necessary.
1455
1456This function does not have to worry about setting the reloc
1457address or the reloc symbol index.
1458
1459LOCAL_SYMS is a pointer to the swapped in local symbols.
1460
1461LOCAL_SECTIONS is an array giving the section in the input file
1462corresponding to the st_shndx field of each local symbol.
1463
1464The global hash table entry for the global symbols can be found
1465via elf_sym_hashes (input_bfd).
1466
1467When generating relocatable output, this function must handle
1468STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1469going to be the section symbol corresponding to the output
1470section, which means that the addend must be adjusted
1471accordingly. */
1472
1473static bfd_boolean
1474elf_metag_relocate_section (bfd *output_bfd,
1475 struct bfd_link_info *info,
1476 bfd *input_bfd,
1477 asection *input_section,
1478 bfd_byte *contents,
1479 Elf_Internal_Rela *relocs,
1480 Elf_Internal_Sym *local_syms,
1481 asection **local_sections)
1482{
1483 bfd_vma *local_got_offsets;
1484 Elf_Internal_Shdr *symtab_hdr;
1485 struct elf_link_hash_entry **eh_syms;
1486 struct elf_metag_link_hash_table *htab;
1487 Elf_Internal_Rela *rel;
1488 Elf_Internal_Rela *relend;
1489 asection *sreloc;
1490
1491 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1492 eh_syms = elf_sym_hashes (input_bfd);
1493 relend = relocs + input_section->reloc_count;
1494
1495 htab = metag_link_hash_table (info);
1496 local_got_offsets = elf_local_got_offsets (input_bfd);
1497
1498 sreloc = NULL;
1499
1500 for (rel = relocs; rel < relend; rel ++)
1501 {
1502 reloc_howto_type *howto;
1503 unsigned long r_symndx;
1504 Elf_Internal_Sym *sym;
1505 asection *sec;
1506 struct elf_metag_link_hash_entry *hh;
1507 bfd_vma relocation;
1508 bfd_reloc_status_type r;
1509 const char *name;
1510 int r_type;
1511
1512 r_type = ELF32_R_TYPE (rel->r_info);
1513
1514 if (r_type == R_METAG_GNU_VTINHERIT
1515 || r_type == R_METAG_GNU_VTENTRY
1516 || r_type == R_METAG_NONE)
1517 continue;
1518
1519 r_symndx = ELF32_R_SYM (rel->r_info);
1520
1521 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1522 hh = NULL;
1523 sym = NULL;
1524 sec = NULL;
1525
1526 if (r_symndx < symtab_hdr->sh_info)
1527 {
1528 sym = local_syms + r_symndx;
1529 sec = local_sections [r_symndx];
1530 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1531
1532 name = bfd_elf_string_from_elf_section
1533 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1534 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1535 }
1536 else
1537 {
1538 struct elf_link_hash_entry *eh;
62d887d4 1539 bfd_boolean unresolved_reloc, warned, ignored;
a3c62988
NC		 1540
1541 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1542 r_symndx, symtab_hdr, eh_syms,
1543 eh, sec, relocation,
62d887d4 1544 unresolved_reloc, warned, ignored);
a3c62988
NC		 1545
1546 name = eh->root.root.string;
1547 hh = (struct elf_metag_link_hash_entry *) eh;
1548 }
1549
1550 if (sec != NULL && discarded_section (sec))
1551 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1552 rel, relend, howto, contents);
1553
0e1862bb 1554 if (bfd_link_relocatable (info))
a3c62988
NC		 1555 continue;
1556
1557 switch (r_type)
1558 {
1559 case R_METAG_ADDR32:
1560 case R_METAG_RELBRANCH:
1561 if ((input_section->flags & SEC_ALLOC) == 0)
1562 break;
1563
0e1862bb 1564 if ((bfd_link_pic (info)
a3c62988
NC		 1565 && r_symndx != STN_UNDEF
1566 && (input_section->flags & SEC_ALLOC) != 0
1567 && (r_type != R_METAG_RELBRANCH
1568 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
0e1862bb 1569 || (!bfd_link_pic (info)
a3c62988
NC		 1570 && hh != NULL
1571 && hh->eh.dynindx != -1
1572 && !hh->eh.non_got_ref
1573 && ((hh->eh.def_dynamic
1574 && !hh->eh.def_regular)
1575 || hh->eh.root.type == bfd_link_hash_undefweak
1576 || hh->eh.root.type == bfd_link_hash_undefined)))
1577 {
1578 Elf_Internal_Rela outrel;
1579 bfd_boolean skip, relocate;
1580 bfd_byte *loc;
1581
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1584 time. */
1585
1586 sreloc = elf_section_data (input_section)->sreloc;
1587 BFD_ASSERT (sreloc != NULL);
1588
1589 skip = FALSE;
1590 relocate = FALSE;
1591
1592 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1593 info,
1594 input_section,
1595 rel->r_offset);
1596 if (outrel.r_offset == (bfd_vma) -1)
1597 skip = TRUE;
1598 else if (outrel.r_offset == (bfd_vma) -2)
1599 skip = TRUE, relocate = TRUE;
1600 outrel.r_offset += (input_section->output_section->vma
1601 + input_section->output_offset);
1602
1603 if (skip)
1604 {
1605 memset (&outrel, 0, sizeof outrel);
1606 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1607 }
1608 else if (r_type == R_METAG_RELBRANCH)
1609 {
1610 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1611 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1612 outrel.r_addend = rel->r_addend;
1613 }
1614 else
1615 {
1616 /* h->dynindx may be -1 if this symbol was marked to
1617 become local. */
1618 if (hh == NULL
1619 || ((info->symbolic || hh->eh.dynindx == -1)
1620 && hh->eh.def_regular))
1621 {
1622 relocate = TRUE;
1623 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1624 outrel.r_addend = relocation + rel->r_addend;
1625 }
1626 else
1627 {
1628 BFD_ASSERT (hh->eh.dynindx != -1);
1629 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1630 outrel.r_addend = rel->r_addend;
1631 }
1632 }
1633
1634 loc = sreloc->contents;
1635 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1636 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1637 ++sreloc->reloc_count;
1638
1639 /* If this reloc is against an external symbol, we do
1640 not want to fiddle with the addend. Otherwise, we
1641 need to include the symbol value so that it becomes
1642 an addend for the dynamic reloc. */
1643 if (! relocate)
1644 continue;
1645 }
1646 break;
1647
1648 case R_METAG_RELBRANCH_PLT:
1649 /* Relocation is to the entry for this symbol in the
1650 procedure linkage table. */
1651
1652 if (hh == NULL)
1653 break;
1654
1655 if (hh->eh.forced_local)
1656 break;
1657
ce558b89 1658 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
a3c62988
NC		 1659 {
1660 /* We didn't make a PLT entry for this symbol. This
1661 happens when statically linking PIC code, or when
1662 using -Bsymbolic. */
1663 break;
1664 }
1665
ce558b89
AM		 1666 relocation = (htab->etab.splt->output_section->vma
1667 + htab->etab.splt->output_offset
a3c62988
NC		 1668 + hh->eh.plt.offset);
1669 break;
1670 case R_METAG_HI16_GOTPC:
1671 case R_METAG_LO16_GOTPC:
ce558b89 1672 BFD_ASSERT (htab->etab.sgot != NULL);
a3c62988 1673
ce558b89
AM		 1674 relocation = (htab->etab.sgot->output_section->vma +
1675 htab->etab.sgot->output_offset);
a3c62988
NC		 1676 relocation += GOT_REG_OFFSET;
1677 relocation -= (input_section->output_section->vma
1678 + input_section->output_offset
1679 + rel->r_offset);
1680 break;
1681 case R_METAG_HI16_GOTOFF:
1682 case R_METAG_LO16_GOTOFF:
1683 case R_METAG_GETSET_GOTOFF:
ce558b89 1684 BFD_ASSERT (htab->etab.sgot != NULL);
a3c62988 1685
ce558b89
AM		 1686 relocation -= (htab->etab.sgot->output_section->vma +
1687 htab->etab.sgot->output_offset);
a3c62988
NC		 1688 relocation -= GOT_REG_OFFSET;
1689 break;
1690 case R_METAG_GETSET_GOT:
1691 {
1692 bfd_vma off;
1693 bfd_boolean do_got = 0;
1694
1695 /* Relocation is to the entry for this symbol in the
1696 global offset table. */
1697 if (hh != NULL)
1698 {
1699 bfd_boolean dyn;
1700
1701 off = hh->eh.got.offset;
1702 dyn = htab->etab.dynamic_sections_created;
0e1862bb
L		 1703 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1704 bfd_link_pic (info),
a3c62988
NC		 1705 &hh->eh))
1706 {
1707 /* If we aren't going to call finish_dynamic_symbol,
1708 then we need to handle initialisation of the .got
1709 entry and create needed relocs here. Since the
1710 offset must always be a multiple of 4, we use the
1711 least significant bit to record whether we have
1712 initialised it already. */
1713 if ((off & 1) != 0)
1714 off &= ~1;
1715 else
1716 {
1717 hh->eh.got.offset |= 1;
1718 do_got = 1;
1719 }
1720 }
1721 }
1722 else
1723 {
1724 /* Local symbol case. */
1725 if (local_got_offsets == NULL)
1726 abort ();
1727
1728 off = local_got_offsets[r_symndx];
1729
1730 /* The offset must always be a multiple of 4. We use
1731 the least significant bit to record whether we have
1732 already generated the necessary reloc. */
1733 if ((off & 1) != 0)
1734 off &= ~1;
1735 else
1736 {
1737 local_got_offsets[r_symndx] |= 1;
1738 do_got = 1;
1739 }
1740 }
1741
1742 if (do_got)
1743 {
0e1862bb 1744 if (bfd_link_pic (info))
a3c62988
NC		 1745 {
1746 /* Output a dynamic relocation for this GOT entry.
1747 In this case it is relative to the base of the
1748 object because the symbol index is zero. */
1749 Elf_Internal_Rela outrel;
1750 bfd_byte *loc;
ce558b89 1751 asection *s = htab->etab.srelgot;
a3c62988
NC		 1752
1753 outrel.r_offset = (off
ce558b89
AM		 1754 + htab->etab.sgot->output_offset
1755 + htab->etab.sgot->output_section->vma);
a3c62988
NC		 1756 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1757 outrel.r_addend = relocation;
1758 loc = s->contents;
1759 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1760 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1761 }
1762 else
1763 bfd_put_32 (output_bfd, relocation,
ce558b89 1764 htab->etab.sgot->contents + off);
a3c62988
NC		 1765 }
1766
1767 if (off >= (bfd_vma) -2)
1768 abort ();
1769
1770 relocation = off - GOT_REG_OFFSET;
1771 }
1772 break;
1773 case R_METAG_TLS_GD:
1774 case R_METAG_TLS_IE:
1775 {
1776 /* XXXMJF There is room here for optimisations. For example
1777 converting from GD->IE, etc. */
1778 bfd_vma off;
1779 int indx;
1780 char tls_type;
1781
ce558b89 1782 if (htab->etab.sgot == NULL)
a3c62988
NC		 1783 abort();
1784
1785 indx = 0;
1786 if (hh != NULL)
1787 {
1788 bfd_boolean dyn;
1789 dyn = htab->etab.dynamic_sections_created;
1790
0e1862bb
L		 1791 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1792 bfd_link_pic (info),
1793 &hh->eh)
1794 && (!bfd_link_pic (info)
a3c62988
NC		 1795 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1796 {
1797 indx = hh->eh.dynindx;
1798 }
1799 off = hh->eh.got.offset;
1800 tls_type = hh->tls_type;
1801 }
1802 else
1803 {
1804 /* Local symbol case. */
1805 if (local_got_offsets == NULL)
1806 abort ();
1807
1808 off = local_got_offsets[r_symndx];
1809 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1810 }
1811
1812 if (tls_type == GOT_UNKNOWN)
6ec49e7c 1813 abort ();
a3c62988
NC		 1814
1815 if ((off & 1) != 0)
1816 off &= ~1;
1817 else
1818 {
1819 bfd_boolean need_relocs = FALSE;
1820 Elf_Internal_Rela outrel;
1821 bfd_byte *loc = NULL;
1822 int cur_off = off;
1823
1824 /* The GOT entries have not been initialized yet. Do it
1825 now, and emit any relocations. If both an IE GOT and a
1826 GD GOT are necessary, we emit the GD first. */
1827
0e1862bb 1828 if ((bfd_link_pic (info) || indx != 0)
a3c62988
NC		 1829 && (hh == NULL
1830 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1831 || hh->eh.root.type != bfd_link_hash_undefweak))
1832 {
1833 need_relocs = TRUE;
ce558b89 1834 loc = htab->etab.srelgot->contents;
a3c62988 1835 /* FIXME (CAO): Should this be reloc_count++ ? */
ce558b89 1836 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
a3c62988
NC		 1837 }
1838
1839 if (tls_type & GOT_TLS_GD)
1840 {
1841 if (need_relocs)
1842 {
1843 outrel.r_offset = (cur_off
ce558b89
AM		 1844 + htab->etab.sgot->output_section->vma
1845 + htab->etab.sgot->output_offset);
a3c62988
NC		 1846 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1847 outrel.r_addend = 0;
ce558b89 1848 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
a3c62988
NC		 1849
1850 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ce558b89 1851 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1852 loc += sizeof (Elf32_External_Rela);
1853
1854 if (indx == 0)
1855 bfd_put_32 (output_bfd, 0,
ce558b89 1856 htab->etab.sgot->contents + cur_off + 4);
a3c62988
NC		 1857 else
1858 {
1859 bfd_put_32 (output_bfd, 0,
ce558b89 1860 htab->etab.sgot->contents + cur_off + 4);
a3c62988
NC		 1861 outrel.r_info = ELF32_R_INFO (indx,
1862 R_METAG_TLS_DTPOFF);
1863 outrel.r_offset += 4;
1864 bfd_elf32_swap_reloca_out (output_bfd,
1865 &outrel, loc);
ce558b89 1866 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1867 loc += sizeof (Elf32_External_Rela);
1868 }
1869 }
1870 else
1871 {
1872 /* We don't support changing the TLS model. */
6ec49e7c
NC		 1873 /* PR 20675 */
1874 if (bfd_link_pic (info))
1875 _bfd_error_handler (_("%B(%A): multiple TLS models are not supported"),
1876 input_bfd, input_section, name);
1877 else
1878 _bfd_error_handler (_("%B(%A): shared library symbol %s encountered whilst performing a static link"),
1879 input_bfd, input_section, name);
1880 return FALSE;
a3c62988
NC		 1881 }
1882
1883 cur_off += 8;
1884 }
1885
1886 if (tls_type & GOT_TLS_IE)
1887 {
1888 if (need_relocs)
1889 {
1890 outrel.r_offset = (cur_off
ce558b89
AM		 1891 + htab->etab.sgot->output_section->vma
1892 + htab->etab.sgot->output_offset);
a3c62988
NC		 1893 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1894
1895 if (indx == 0)
1896 outrel.r_addend = relocation - dtpoff_base (info);
1897 else
1898 outrel.r_addend = 0;
1899
1900 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ce558b89 1901 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1902 loc += sizeof (Elf32_External_Rela);
1903 }
1904 else
1905 bfd_put_32 (output_bfd, tpoff (info, relocation),
ce558b89 1906 htab->etab.sgot->contents + cur_off);
a3c62988
NC		 1907
1908 cur_off += 4;
1909 }
1910
1911 if (hh != NULL)
1912 hh->eh.got.offset |= 1;
1913 else
1914 local_got_offsets[r_symndx] |= 1;
1915 }
1916
1917 /* Add the base of the GOT to the relocation value. */
1918 relocation = off - GOT_REG_OFFSET;
1919
1920 break;
1921 }
1922
1923 case R_METAG_TLS_IENONPIC_HI16:
1924 case R_METAG_TLS_IENONPIC_LO16:
1925 case R_METAG_TLS_LE_HI16:
1926 case R_METAG_TLS_LE_LO16:
0e1862bb 1927 if (bfd_link_pic (info))
a3c62988 1928 {
4eca0228 1929 _bfd_error_handler
695344c0 1930 /* xgettext:c-format */
a3c62988
NC		 1931 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1932 input_bfd, input_section,
1933 (long) rel->r_offset, howto->name);
1934 return FALSE;
1935 }
1936 else
1937 relocation = tpoff (info, relocation);
1938 break;
1939 case R_METAG_TLS_LDO_HI16:
1940 case R_METAG_TLS_LDO_LO16:
0e1862bb 1941 if (! bfd_link_pic (info))
a3c62988
NC		 1942 relocation = tpoff (info, relocation);
1943 else
1944 relocation -= dtpoff_base (info);
1945 break;
1946 case R_METAG_TLS_LDM:
1947 {
1948 bfd_vma off;
1949
ce558b89 1950 if (htab->etab.sgot == NULL)
a3c62988
NC		 1951 abort();
1952 off = htab->tls_ldm_got.offset;
1953 if (off & 1)
1954 off &= ~1;
1955 else
1956 {
1957 Elf_Internal_Rela outrel;
1958 bfd_byte *loc;
1959
1960 outrel.r_offset = (off
ce558b89
AM		 1961 + htab->etab.sgot->output_section->vma
1962 + htab->etab.sgot->output_offset);
a3c62988
NC		 1963
1964 outrel.r_addend = 0;
1965 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
ce558b89
AM		 1966 loc = htab->etab.srelgot->contents;
1967 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
a3c62988
NC		 1968 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1969 htab->tls_ldm_got.offset |= 1;
1970 }
1971
1972 relocation = off - GOT_REG_OFFSET;
1973 break;
1974 }
1975 default:
1976 break;
1977 }
1978
1979 r = metag_final_link_relocate (howto, input_bfd, input_section,
1980 contents, rel, relocation, hh, htab,
1981 sec);
1982
1983 if (r != bfd_reloc_ok)
1984 {
1985 const char * msg = (const char *) NULL;
1986
1987 switch (r)
1988 {
1989 case bfd_reloc_overflow:
1a72702b 1990 (*info->callbacks->reloc_overflow)
a3c62988
NC		 1991 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1992 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1993 break;
1994
1995 case bfd_reloc_undefined:
1a72702b
AM		 1996 (*info->callbacks->undefined_symbol)
1997 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
a3c62988
NC		 1998 break;
1999
2000 case bfd_reloc_outofrange:
2001 msg = _("internal error: out of range error");
2002 break;
2003
2004 case bfd_reloc_notsupported:
2005 msg = _("internal error: unsupported relocation error");
2006 break;
2007
2008 case bfd_reloc_dangerous:
2009 msg = _("internal error: dangerous relocation");
2010 break;
2011
2012 default:
2013 msg = _("internal error: unknown error");
2014 break;
2015 }
2016
2017 if (msg)
1a72702b
AM		 2018 (*info->callbacks->warning) (info, msg, name, input_bfd,
2019 input_section, rel->r_offset);
a3c62988
NC		 2020 }
2021 }
2022
2023 return TRUE;
2024}
2025
2026/* Create the .plt and .got sections, and set up our hash table
2027 short-cuts to various dynamic sections. */
2028
2029static bfd_boolean
2030elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2031{
2032 struct elf_metag_link_hash_table *htab;
2033 struct elf_link_hash_entry *eh;
2034 struct bfd_link_hash_entry *bh;
2035 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2036
2037 /* Don't try to create the .plt and .got twice. */
2038 htab = metag_link_hash_table (info);
ce558b89 2039 if (htab->etab.splt != NULL)
a3c62988
NC		 2040 return TRUE;
2041
2042 /* Call the generic code to do most of the work. */
2043 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2044 return FALSE;
2045
ce558b89
AM		 2046 /* The header goes at the start of the dynamic .got section, which
2047 is placed after the dynamic .got.plt section. ie. The header is
2048 not necessarily at the start of the output .got section. */
2049 htab->etab.sgot->size += 12;
a3c62988 2050
ce558b89 2051 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
a3c62988
NC		 2052 bh = NULL;
2053 if (!(_bfd_generic_link_add_one_symbol
ce558b89 2054 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot,
a3c62988
NC		 2055 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2056 return FALSE;
2057 eh = (struct elf_link_hash_entry *) bh;
2058 eh->def_regular = 1;
2059 eh->type = STT_OBJECT;
2060 eh->other = STV_HIDDEN;
2061
0e1862bb 2062 if (! bfd_link_executable (info)
a3c62988
NC		 2063 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2064 return FALSE;
2065
ce558b89 2066 htab->etab.hgot = eh;
a3c62988 2067
a3c62988
NC		 2068 return TRUE;
2069}
2070
2071/* Look through the relocs for a section during the first phase, and
2072 calculate needed space in the global offset table, procedure linkage
2073 table, and dynamic reloc sections. At this point we haven't
2074 necessarily read all the input files. */
2075
2076static bfd_boolean
2077elf_metag_check_relocs (bfd *abfd,
2078 struct bfd_link_info *info,
2079 asection *sec,
2080 const Elf_Internal_Rela *relocs)
2081{
2082 Elf_Internal_Shdr *symtab_hdr;
2083 struct elf_link_hash_entry **eh_syms;
2084 const Elf_Internal_Rela *rel;
2085 const Elf_Internal_Rela *rel_end;
2086 struct elf_metag_link_hash_table *htab;
2087 asection *sreloc;
2088 bfd *dynobj;
2089 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2090
0e1862bb 2091 if (bfd_link_relocatable (info))
a3c62988
NC		 2092 return TRUE;
2093
2094 htab = metag_link_hash_table (info);
2095 dynobj = htab->etab.dynobj;
2096 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2097 eh_syms = elf_sym_hashes (abfd);
2098 sreloc = NULL;
2099
2100 if (htab == NULL)
2101 return FALSE;
2102
2103 rel_end = relocs + sec->reloc_count;
2104 for (rel = relocs; rel < rel_end; rel++)
2105 {
2106 int r_type;
2107 struct elf_metag_link_hash_entry *hh;
1a18f0ae 2108 Elf_Internal_Sym *isym;
a3c62988
NC		 2109 unsigned long r_symndx;
2110
2111 r_symndx = ELF32_R_SYM (rel->r_info);
2112 r_type = ELF32_R_TYPE (rel->r_info);
2113 if (r_symndx < symtab_hdr->sh_info)
1a18f0ae
NC		 2114 {
2115 /* A local symbol. */
2116 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2117 abfd, r_symndx);
2118 if (isym == NULL)
2119 return FALSE;
2120
2121 hh = NULL;
2122 }
a3c62988
NC		 2123 else
2124 {
1a18f0ae
NC		 2125 isym = NULL;
2126
a3c62988
NC		 2127 hh = (struct elf_metag_link_hash_entry *)
2128 eh_syms[r_symndx - symtab_hdr->sh_info];
2129 while (hh->eh.root.type == bfd_link_hash_indirect
2130 || hh->eh.root.type == bfd_link_hash_warning)
2131 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
81fbe831
AM		 2132
2133 /* PR15323, ref flags aren't set for references in the same
2134 object. */
bc4e12de 2135 hh->eh.root.non_ir_ref_regular = 1;
a3c62988
NC		 2136 }
2137
2138 /* Some relocs require a global offset table. */
ce558b89 2139 if (htab->etab.sgot == NULL)
a3c62988
NC		 2140 {
2141 switch (r_type)
2142 {
2143 case R_METAG_TLS_GD:
2144 case R_METAG_TLS_LDM:
2145 case R_METAG_TLS_IE:
0e1862bb 2146 if (bfd_link_pic (info))
a3c62988
NC		 2147 info->flags |= DF_STATIC_TLS;
2148 /* Fall through. */
2149
2150 case R_METAG_HI16_GOTOFF:
2151 case R_METAG_LO16_GOTOFF:
2152 case R_METAG_GETSET_GOTOFF:
2153 case R_METAG_GETSET_GOT:
2154 case R_METAG_HI16_GOTPC:
2155 case R_METAG_LO16_GOTPC:
2156 if (dynobj == NULL)
2157 htab->etab.dynobj = dynobj = abfd;
2158 if (!elf_metag_create_dynamic_sections (dynobj, info))
2159 return FALSE;
2160 break;
2161
2162 default:
2163 break;
2164 }
2165 }
2166
2167 switch (r_type)
2168 {
2169 case R_METAG_TLS_IE:
2170 case R_METAG_TLS_GD:
2171 case R_METAG_GETSET_GOT:
2172 switch (r_type)
2173 {
2174 default:
2175 tls_type = GOT_NORMAL;
2176 break;
2177 case R_METAG_TLS_IE:
2178 tls_type = GOT_TLS_IE;
2179 break;
2180 case R_METAG_TLS_GD:
2181 tls_type = GOT_TLS_GD;
2182 break;
2183 }
2184
2185 if (hh != NULL)
2186 {
2187 hh->eh.got.refcount += 1;
2188 old_tls_type = hh->tls_type;
2189 }
2190 else
2191 {
2192 bfd_signed_vma *local_got_refcounts;
2193
2194 /* This is a global offset table entry for a local
2195 symbol. */
2196 local_got_refcounts = elf_local_got_refcounts (abfd);
2197 if (local_got_refcounts == NULL)
2198 {
2199 bfd_size_type size;
2200
2201 size = symtab_hdr->sh_info;
2202 size *= sizeof (bfd_signed_vma);
2203 /* Add in space to store the local GOT TLS types. */
2204 size += symtab_hdr->sh_info;
2205 local_got_refcounts = ((bfd_signed_vma *)
2206 bfd_zalloc (abfd, size));
2207 if (local_got_refcounts == NULL)
2208 return FALSE;
2209 elf_local_got_refcounts (abfd) = local_got_refcounts;
2210 memset (metag_elf_local_got_tls_type (abfd),
2211 GOT_UNKNOWN, symtab_hdr->sh_info);
2212 }
2213 local_got_refcounts[r_symndx] += 1;
2214 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2215 }
2216
2217 if (old_tls_type != tls_type)
2218 {
2219 if (hh != NULL)
2220 {
2221 hh->tls_type = tls_type;
2222 }
2223 else
2224 {
2225 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2226 }
2227 }
2228
2229 break;
2230
2231 case R_METAG_TLS_LDM:
2232 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2233 break;
2234
2235 case R_METAG_RELBRANCH_PLT:
2236 /* This symbol requires a procedure linkage table entry. We
2237 actually build the entry in adjust_dynamic_symbol,
2238 because this might be a case of linking PIC code without
2239 linking in any dynamic objects, in which case we don't
2240 need to generate a procedure linkage table after all. */
2241
2242 /* If this is a local symbol, we resolve it directly without
2243 creating a procedure linkage table entry. */
2244 if (hh == NULL)
2245 continue;
2246
2247 if (hh->eh.forced_local)
2248 break;
2249
2250 hh->eh.needs_plt = 1;
2251 hh->eh.plt.refcount += 1;
2252 break;
2253
a3c62988
NC		 2254 case R_METAG_HIADDR16:
2255 case R_METAG_LOADDR16:
1a18f0ae
NC		 2256 /* Let's help debug shared library creation. These relocs
2257 cannot be used in shared libs. Don't error out for
2258 sections we don't care about, such as debug sections or
2259 non-constant sections. */
0e1862bb 2260 if (bfd_link_pic (info)
1a18f0ae
NC		 2261 && (sec->flags & SEC_ALLOC) != 0
2262 && (sec->flags & SEC_READONLY) != 0)
2263 {
2264 const char *name;
2265
2266 if (hh)
2267 name = hh->eh.root.root.string;
2268 else
2269 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
4eca0228 2270 _bfd_error_handler
695344c0 2271 /* xgettext:c-format */
1a18f0ae
NC		 2272 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2273 abfd, elf_metag_howto_table[r_type].name, name);
2274 bfd_set_error (bfd_error_bad_value);
2275 return FALSE;
2276 }
2277
2278 /* Fall through. */
2279 case R_METAG_ADDR32:
a3c62988
NC		 2280 case R_METAG_RELBRANCH:
2281 case R_METAG_GETSETOFF:
0e1862bb 2282 if (hh != NULL && !bfd_link_pic (info))
a3c62988
NC		 2283 {
2284 hh->eh.non_got_ref = 1;
2285 hh->eh.plt.refcount += 1;
2286 }
2287
2288 /* If we are creating a shared library, and this is a reloc
2289 against a global symbol, or a non PC relative reloc
2290 against a local symbol, then we need to copy the reloc
2291 into the shared library. However, if we are linking with
2292 -Bsymbolic, we do not need to copy a reloc against a
2293 global symbol which is defined in an object we are
2294 including in the link (i.e., DEF_REGULAR is set). At
2295 this point we have not seen all the input files, so it is
2296 possible that DEF_REGULAR is not set now but will be set
2297 later (it is never cleared). We account for that
2298 possibility below by storing information in the
2299 dyn_relocs field of the hash table entry. A similar
2300 situation occurs when creating shared libraries and symbol
2301 visibility changes render the symbol local.
2302
2303 If on the other hand, we are creating an executable, we
2304 may need to keep relocations for symbols satisfied by a
2305 dynamic library if we manage to avoid copy relocs for the
2306 symbol. */
0e1862bb 2307 if ((bfd_link_pic (info)
a3c62988
NC		 2308 && (sec->flags & SEC_ALLOC) != 0
2309 && (r_type != R_METAG_RELBRANCH
2310 || (hh != NULL
2311 && (! info->symbolic
2312 || hh->eh.root.type == bfd_link_hash_defweak
2313 || !hh->eh.def_regular))))
0e1862bb 2314 || (!bfd_link_pic (info)
a3c62988
NC		 2315 && (sec->flags & SEC_ALLOC) != 0
2316 && hh != NULL
2317 && (hh->eh.root.type == bfd_link_hash_defweak
2318 || !hh->eh.def_regular)))
2319 {
2320 struct elf_metag_dyn_reloc_entry *hdh_p;
2321 struct elf_metag_dyn_reloc_entry **hdh_head;
2322
2323 if (dynobj == NULL)
2324 htab->etab.dynobj = dynobj = abfd;
2325
2326 /* When creating a shared object, we must copy these
2327 relocs into the output file. We create a reloc
2328 section in dynobj and make room for the reloc. */
2329 if (sreloc == NULL)
2330 {
2331 sreloc = _bfd_elf_make_dynamic_reloc_section
2332 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2333
2334 if (sreloc == NULL)
2335 {
2336 bfd_set_error (bfd_error_bad_value);
2337 return FALSE;
2338 }
2339
2340 elf_section_data (sec)->sreloc = sreloc;
2341 }
2342
2343 /* If this is a global symbol, we count the number of
2344 relocations we need for this symbol. */
2345 if (hh != NULL)
2346 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2347 else
2348 {
2349 /* Track dynamic relocs needed for local syms too. */
2350 asection *sr;
2351 void *vpp;
a3c62988
NC		 2352
2353 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2354 if (sr == NULL)
2355 sr = sec;
2356
2357 vpp = &elf_section_data (sr)->local_dynrel;
2358 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2359 }
2360
2361 hdh_p = *hdh_head;
2362 if (hdh_p == NULL || hdh_p->sec != sec)
2363 {
2364 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2365 bfd_alloc (dynobj, sizeof *hdh_p));
2366 if (hdh_p == NULL)
2367 return FALSE;
2368 hdh_p->hdh_next = *hdh_head;
2369 *hdh_head = hdh_p;
2370 hdh_p->sec = sec;
2371 hdh_p->count = 0;
2372 hdh_p->relative_count = 0;
2373 }
2374
2375 hdh_p->count += 1;
2376 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2377 hdh_p->relative_count += 1;
2378 }
2379 break;
2380
2381 /* This relocation describes the C++ object vtable hierarchy.
2382 Reconstruct it for later use during GC. */
2383 case R_METAG_GNU_VTINHERIT:
2384 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2385 rel->r_offset))
2386 return FALSE;
2387 break;
2388
2389 /* This relocation describes which C++ vtable entries are actually
2390 used. Record for later use during GC. */
2391 case R_METAG_GNU_VTENTRY:
2392 BFD_ASSERT (hh != NULL);
2393 if (hh != NULL
2394 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2395 return FALSE;
2396 break;
2397 }
2398 }
2399
2400 return TRUE;
2401}
2402
2403/* Copy the extra info we tack onto an elf_link_hash_entry. */
2404
2405static void
2406elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2407 struct elf_link_hash_entry *eh_dir,
2408 struct elf_link_hash_entry *eh_ind)
2409{
2410 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2411
2412 hh_dir = metag_elf_hash_entry (eh_dir);
2413 hh_ind = metag_elf_hash_entry (eh_ind);
2414
2415 if (hh_ind->dyn_relocs != NULL)
2416 {
2417 if (hh_dir->dyn_relocs != NULL)
2418 {
2419 struct elf_metag_dyn_reloc_entry **hdh_pp;
2420 struct elf_metag_dyn_reloc_entry *hdh_p;
2421
2422 if (eh_ind->root.type == bfd_link_hash_indirect)
2423 abort ();
2424
2425 /* Add reloc counts against the weak sym to the strong sym
2426 list. Merge any entries against the same section. */
2427 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2428 {
2429 struct elf_metag_dyn_reloc_entry *hdh_q;
2430
2431 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2432 hdh_q = hdh_q->hdh_next)
2433 if (hdh_q->sec == hdh_p->sec)
2434 {
2435 hdh_q->relative_count += hdh_p->relative_count;
2436 hdh_q->count += hdh_p->count;
2437 *hdh_pp = hdh_p->hdh_next;
2438 break;
2439 }
2440 if (hdh_q == NULL)
2441 hdh_pp = &hdh_p->hdh_next;
2442 }
2443 *hdh_pp = hh_dir->dyn_relocs;
2444 }
2445
2446 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2447 hh_ind->dyn_relocs = NULL;
2448 }
2449
2450 if (eh_ind->root.type == bfd_link_hash_indirect
2451 && eh_dir->got.refcount <= 0)
2452 {
2453 hh_dir->tls_type = hh_ind->tls_type;
2454 hh_ind->tls_type = GOT_UNKNOWN;
2455 }
2456
2457 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2458}
2459
2460/* Adjust a symbol defined by a dynamic object and referenced by a
2461 regular object. The current definition is in some section of the
2462 dynamic object, but we're not including those sections. We have to
2463 change the definition to something the rest of the link can
2464 understand. */
2465
2466static bfd_boolean
2467elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2468 struct elf_link_hash_entry *eh)
2469{
2470 struct elf_metag_link_hash_table *htab;
2471 struct elf_metag_link_hash_entry *hh;
2472 struct elf_metag_dyn_reloc_entry *hdh_p;
5474d94f 2473 asection *s, *srel;
a3c62988
NC		 2474
2475 /* If this is a function, put it in the procedure linkage table. We
2476 will fill in the contents of the procedure linkage table later,
2477 when we know the address of the .got section. */
2478 if (eh->type == STT_FUNC
2479 || eh->needs_plt)
2480 {
2481 if (eh->plt.refcount <= 0
2482 || SYMBOL_CALLS_LOCAL (info, eh)
2483 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2484 && eh->root.type == bfd_link_hash_undefweak))
2485 {
2486 /* This case can occur if we saw a PLT reloc in an input
2487 file, but the symbol was never referred to by a dynamic
2488 object. In such a case, we don't actually need to build
2489 a procedure linkage table, and we can just do a PCREL
2490 reloc instead. */
2491 eh->plt.offset = (bfd_vma) -1;
2492 eh->needs_plt = 0;
2493 }
2494
2495 return TRUE;
2496 }
2497 else
2498 eh->plt.offset = (bfd_vma) -1;
2499
2500 /* If this is a weak symbol, and there is a real definition, the
2501 processor independent code will have arranged for us to see the
2502 real definition first, and we can just use the same value. */
2503 if (eh->u.weakdef != NULL)
2504 {
2505 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2506 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2507 abort ();
2508 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2509 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2510 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2511 return TRUE;
2512 }
2513
2514 /* This is a reference to a symbol defined by a dynamic object which
2515 is not a function. */
2516
2517 /* If we are creating a shared library, we must presume that the
2518 only references to the symbol are via the global offset table.
2519 For such cases we need not do anything here; the relocations will
2520 be handled correctly by relocate_section. */
0e1862bb 2521 if (bfd_link_pic (info))
a3c62988
NC		 2522 return TRUE;
2523
2524 /* If there are no references to this symbol that do not use the
2525 GOT, we don't need to generate a copy reloc. */
2526 if (!eh->non_got_ref)
2527 return TRUE;
2528
2529 /* If -z nocopyreloc was given, we won't generate them either. */
2530 if (info->nocopyreloc)
2531 {
2532 eh->non_got_ref = 0;
2533 return TRUE;
2534 }
2535
2536 hh = (struct elf_metag_link_hash_entry *) eh;
2537 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2538 {
2539 s = hdh_p->sec->output_section;
2540 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2541 break;
2542 }
2543
2544 /* If we didn't find any dynamic relocs in read-only sections, then
2545 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2546 if (hdh_p == NULL)
2547 {
2548 eh->non_got_ref = 0;
2549 return TRUE;
2550 }
2551
a3c62988
NC		 2552 /* We must allocate the symbol in our .dynbss section, which will
2553 become part of the .bss section of the executable. There will be
2554 an entry for this symbol in the .dynsym section. The dynamic
2555 object will contain position independent code, so all references
2556 from the dynamic object to this symbol will go through the global
2557 offset table. The dynamic linker will use the .dynsym entry to
2558 determine the address it must put in the global offset table, so
2559 both the dynamic object and the regular object will refer to the
2560 same memory location for the variable. */
2561
2562 htab = metag_link_hash_table (info);
2563
2564 /* We must generate a COPY reloc to tell the dynamic linker to
2565 copy the initial value out of the dynamic object and into the
2566 runtime process image. */
5474d94f
AM		 2567 if ((eh->root.u.def.section->flags & SEC_READONLY) != 0)
2568 {
2569 s = htab->etab.sdynrelro;
2570 srel = htab->etab.sreldynrelro;
2571 }
2572 else
2573 {
2574 s = htab->etab.sdynbss;
2575 srel = htab->etab.srelbss;
2576 }
34c67f14 2577 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
a3c62988 2578 {
5474d94f 2579 srel->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2580 eh->needs_copy = 1;
2581 }
2582
6cabe1ea 2583 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
a3c62988
NC		 2584}
2585
2586/* Allocate space in .plt, .got and associated reloc sections for
2587 global syms. */
2588
2589static bfd_boolean
2590allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2591{
2592 struct bfd_link_info *info;
2593 struct elf_metag_link_hash_table *htab;
2594 struct elf_metag_link_hash_entry *hh;
2595 struct elf_metag_dyn_reloc_entry *hdh_p;
2596
2597 if (eh->root.type == bfd_link_hash_indirect)
2598 return TRUE;
2599
2600 if (eh->root.type == bfd_link_hash_warning)
2601 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2602
2603 info = inf;
2604 htab = metag_link_hash_table (info);
2605
2606 if (htab->etab.dynamic_sections_created
2607 && eh->plt.refcount > 0)
2608 {
2609 /* Make sure this symbol is output as a dynamic symbol.
2610 Undefined weak syms won't yet be marked as dynamic. */
2611 if (eh->dynindx == -1
2612 && !eh->forced_local)
2613 {
2614 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2615 return FALSE;
2616 }
2617
0e1862bb 2618 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
a3c62988 2619 {
ce558b89 2620 asection *s = htab->etab.splt;
a3c62988
NC		 2621
2622 /* If this is the first .plt entry, make room for the special
2623 first entry. */
2624 if (s->size == 0)
2625 s->size += PLT_ENTRY_SIZE;
2626
2627 eh->plt.offset = s->size;
2628
2629 /* If this symbol is not defined in a regular file, and we are
2630 not generating a shared library, then set the symbol to this
2631 location in the .plt. This is required to make function
2632 pointers compare as equal between the normal executable and
2633 the shared library. */
0e1862bb 2634 if (! bfd_link_pic (info)
a3c62988
NC		 2635 && !eh->def_regular)
2636 {
2637 eh->root.u.def.section = s;
2638 eh->root.u.def.value = eh->plt.offset;
2639 }
2640
2641 /* Make room for this entry. */
2642 s->size += PLT_ENTRY_SIZE;
2643
2644 /* We also need to make an entry in the .got.plt section, which
2645 will be placed in the .got section by the linker script. */
ce558b89 2646 htab->etab.sgotplt->size += 4;
a3c62988
NC		 2647
2648 /* We also need to make an entry in the .rel.plt section. */
ce558b89 2649 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2650 }
2651 else
2652 {
2653 eh->plt.offset = (bfd_vma) -1;
2654 eh->needs_plt = 0;
2655 }
2656 }
2657 else
2658 {
2659 eh->plt.offset = (bfd_vma) -1;
2660 eh->needs_plt = 0;
2661 }
2662
2663 if (eh->got.refcount > 0)
2664 {
2665 asection *s;
2666 bfd_boolean dyn;
2667 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2668
2669 /* Make sure this symbol is output as a dynamic symbol.
2670 Undefined weak syms won't yet be marked as dynamic. */
2671 if (eh->dynindx == -1
2672 && !eh->forced_local)
2673 {
2674 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2675 return FALSE;
2676 }
2677
ce558b89 2678 s = htab->etab.sgot;
a3c62988
NC		 2679
2680 eh->got.offset = s->size;
2681 s->size += 4;
2682 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2683 if (tls_type == GOT_TLS_GD)
2684 s->size += 4;
2685 dyn = htab->etab.dynamic_sections_created;
2686 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2687 R_METAG_TLS_GD needs one if local symbol and two if global. */
2688 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2689 || (tls_type == GOT_TLS_IE && dyn))
ce558b89 2690 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988 2691 else if (tls_type == GOT_TLS_GD)
ce558b89 2692 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
0e1862bb
L		 2693 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2694 bfd_link_pic (info),
2695 eh))
ce558b89 2696 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2697 }
2698 else
2699 eh->got.offset = (bfd_vma) -1;
2700
2701 hh = (struct elf_metag_link_hash_entry *) eh;
2702 if (hh->dyn_relocs == NULL)
2703 return TRUE;
2704
2705 /* If this is a -Bsymbolic shared link, then we need to discard all
2706 space allocated for dynamic pc-relative relocs against symbols
2707 defined in a regular object. For the normal shared case, discard
2708 space for relocs that have become local due to symbol visibility
2709 changes. */
0e1862bb 2710 if (bfd_link_pic (info))
a3c62988
NC		 2711 {
2712 if (SYMBOL_CALLS_LOCAL (info, eh))
2713 {
2714 struct elf_metag_dyn_reloc_entry **hdh_pp;
2715
2716 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2717 {
2718 hdh_p->count -= hdh_p->relative_count;
2719 hdh_p->relative_count = 0;
2720 if (hdh_p->count == 0)
2721 *hdh_pp = hdh_p->hdh_next;
2722 else
2723 hdh_pp = &hdh_p->hdh_next;
2724 }
2725 }
2726
2727 /* Also discard relocs on undefined weak syms with non-default
2728 visibility. */
2729 if (hh->dyn_relocs != NULL
2730 && eh->root.type == bfd_link_hash_undefweak)
2731 {
2732 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2733 hh->dyn_relocs = NULL;
2734
2735 /* Make sure undefined weak symbols are output as a dynamic
2736 symbol in PIEs. */
2737 else if (eh->dynindx == -1
2738 && !eh->forced_local)
2739 {
2740 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2741 return FALSE;
2742 }
2743 }
2744 }
2745 else
2746 {
2747 /* For the non-shared case, discard space for relocs against
2748 symbols which turn out to need copy relocs or are not
2749 dynamic. */
2750 if (!eh->non_got_ref
2751 && ((eh->def_dynamic
2752 && !eh->def_regular)
2753 || (htab->etab.dynamic_sections_created
2754 && (eh->root.type == bfd_link_hash_undefweak
2755 || eh->root.type == bfd_link_hash_undefined))))
2756 {
2757 /* Make sure this symbol is output as a dynamic symbol.
2758 Undefined weak syms won't yet be marked as dynamic. */
2759 if (eh->dynindx == -1
2760 && !eh->forced_local)
2761 {
2762 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2763 return FALSE;
2764 }
2765
2766 /* If that succeeded, we know we'll be keeping all the
2767 relocs. */
2768 if (eh->dynindx != -1)
2769 goto keep;
2770 }
2771
2772 hh->dyn_relocs = NULL;
2773 return TRUE;
2774
2775 keep: ;
2776 }
2777
2778 /* Finally, allocate space. */
2779 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2780 {
2781 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2782 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2783 }
2784
2785 return TRUE;
2786}
2787
2788/* Find any dynamic relocs that apply to read-only sections. */
2789
2790static bfd_boolean
2791readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2792{
2793 struct elf_metag_link_hash_entry *hh;
2794 struct elf_metag_dyn_reloc_entry *hdh_p;
2795
2796 if (eh->root.type == bfd_link_hash_warning)
2797 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2798
2799 hh = (struct elf_metag_link_hash_entry *) eh;
2800 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2801 {
2802 asection *s = hdh_p->sec->output_section;
2803
2804 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2805 {
2806 struct bfd_link_info *info = inf;
2807
2808 info->flags |= DF_TEXTREL;
2809
2810 /* Not an error, just cut short the traversal. */
2811 return FALSE;
2812 }
2813 }
2814 return TRUE;
2815}
2816
2817/* Set the sizes of the dynamic sections. */
2818
2819static bfd_boolean
2820elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2821 struct bfd_link_info *info)
2822{
2823 struct elf_metag_link_hash_table *htab;
2824 bfd *dynobj;
2825 bfd *ibfd;
2826 asection *s;
2827 bfd_boolean relocs;
2828
2829 htab = metag_link_hash_table (info);
2830 dynobj = htab->etab.dynobj;
2831 if (dynobj == NULL)
2832 abort ();
2833
2834 if (htab->etab.dynamic_sections_created)
2835 {
2836 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 2837 if (bfd_link_executable (info) && !info->nointerp)
a3c62988 2838 {
ad1fc92a 2839 s = bfd_get_linker_section (dynobj, ".interp");
a3c62988
NC		 2840 if (s == NULL)
2841 abort ();
2842 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2843 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2844 }
2845 }
2846
2847 /* Set up .got offsets for local syms, and space for local dynamic
2848 relocs. */
c72f2fb2 2849 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
a3c62988
NC		 2850 {
2851 bfd_signed_vma *local_got;
2852 bfd_signed_vma *end_local_got;
2853 bfd_size_type locsymcount;
2854 Elf_Internal_Shdr *symtab_hdr;
2855 asection *srel;
2856 char *local_tls_type;
2857
2858 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2859 continue;
2860
2861 for (s = ibfd->sections; s != NULL; s = s->next)
2862 {
2863 struct elf_metag_dyn_reloc_entry *hdh_p;
2864
2865 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2866 elf_section_data (s)->local_dynrel);
2867 hdh_p != NULL;
2868 hdh_p = hdh_p->hdh_next)
2869 {
2870 if (!bfd_is_abs_section (hdh_p->sec)
2871 && bfd_is_abs_section (hdh_p->sec->output_section))
2872 {
2873 /* Input section has been discarded, either because
2874 it is a copy of a linkonce section or due to
2875 linker script /DISCARD/, so we'll be discarding
2876 the relocs too. */
2877 }
2878 else if (hdh_p->count != 0)
2879 {
2880 srel = elf_section_data (hdh_p->sec)->sreloc;
2881 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2882 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2883 info->flags |= DF_TEXTREL;
2884 }
2885 }
2886 }
2887
2888 local_got = elf_local_got_refcounts (ibfd);
2889 if (!local_got)
2890 continue;
2891
2892 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2893 locsymcount = symtab_hdr->sh_info;
2894 end_local_got = local_got + locsymcount;
2895 local_tls_type = metag_elf_local_got_tls_type (ibfd);
ce558b89
AM		 2896 s = htab->etab.sgot;
2897 srel = htab->etab.srelgot;
a3c62988
NC		 2898 for (; local_got < end_local_got; ++local_got)
2899 {
2900 if (*local_got > 0)
2901 {
2902 *local_got = s->size;
2903 s->size += GOT_ENTRY_SIZE;
2904 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2905 if (*local_tls_type == GOT_TLS_GD)
2906 s->size += 4;
0e1862bb 2907 if (bfd_link_pic (info))
a3c62988
NC		 2908 srel->size += sizeof (Elf32_External_Rela);
2909 }
2910 else
2911 *local_got = (bfd_vma) -1;
2912 ++local_tls_type;
2913 }
2914 }
2915
2916 if (htab->tls_ldm_got.refcount > 0)
2917 {
2918 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2919 reloc. */
ce558b89
AM		 2920 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2921 htab->etab.sgot->size += 8;
2922 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2923 }
2924 else
2925 htab->tls_ldm_got.offset = -1;
2926
2927 /* Allocate global sym .plt and .got entries, and space for global
2928 sym dynamic relocs. */
2929 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2930
2931 /* We now have determined the sizes of the various dynamic sections.
2932 Allocate memory for them. */
2933 relocs = FALSE;
2934 for (s = dynobj->sections; s != NULL; s = s->next)
2935 {
2936 bfd_boolean reloc_section = FALSE;
2937
2938 if ((s->flags & SEC_LINKER_CREATED) == 0)
2939 continue;
2940
ce558b89
AM		 2941 if (s == htab->etab.splt
2942 || s == htab->etab.sgot
2943 || s == htab->etab.sgotplt
5474d94f
AM		 2944 || s == htab->etab.sdynbss
2945 || s == htab->etab.sdynrelro)
a3c62988
NC		 2946 {
2947 /* Strip this section if we don't need it; see the
2948 comment below. */
2949 }
2950 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2951 {
ce558b89 2952 if (s->size != 0 && s != htab->etab.srelplt)
a3c62988
NC		 2953 relocs = TRUE;
2954
2955 /* We use the reloc_count field as a counter if we need
2956 to copy relocs into the output file. */
2957 s->reloc_count = 0;
2958 reloc_section = TRUE;
2959 }
2960 else
2961 {
2962 /* It's not one of our sections, so don't allocate space. */
2963 continue;
2964 }
2965
2966 if (s->size == 0)
2967 {
2968 /* If we don't need this section, strip it from the
2969 output file. This is mostly to handle .rela.bss and
2970 .rela.plt. We must create both sections in
2971 create_dynamic_sections, because they must be created
2972 before the linker maps input sections to output
2973 sections. The linker does that before
2974 adjust_dynamic_symbol is called, and it is that
2975 function which decides whether anything needs to go
2976 into these sections. */
2977 s->flags |= SEC_EXCLUDE;
2978 continue;
2979 }
2980
2981 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2982 continue;
2983
2984 /* Allocate memory for the section contents. */
2985 s->contents = bfd_zalloc (dynobj, s->size);
2986 if (s->contents == NULL)
2987 return FALSE;
2988 else if (reloc_section)
2989 {
2990 unsigned char *contents = s->contents;
2991 Elf32_External_Rela reloc;
2992
2993 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2994 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2995 reloc.r_info[0] = R_METAG_NONE;
2996 for (; contents < (s->contents + s->size);
2997 contents += sizeof(Elf32_External_Rela))
2998 {
2999 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3000 }
3001 }
3002 }
3003
3004 if (htab->etab.dynamic_sections_created)
3005 {
3006 /* Add some entries to the .dynamic section. We fill in the
3007 values later, in elf_metag_finish_dynamic_sections, but we
3008 must add the entries now so that we get the correct size for
3009 the .dynamic section. The DT_DEBUG entry is filled in by the
3010 dynamic linker and used by the debugger. */
3011#define add_dynamic_entry(TAG, VAL) \
3012 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3013
3014 if (!add_dynamic_entry (DT_PLTGOT, 0))
3015 return FALSE;
3016
0e1862bb 3017 if (bfd_link_executable (info))
a3c62988
NC		 3018 {
3019 if (!add_dynamic_entry (DT_DEBUG, 0))
3020 return FALSE;
3021 }
3022
ce558b89 3023 if (htab->etab.srelplt->size != 0)
a3c62988
NC		 3024 {
3025 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3026 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3027 || !add_dynamic_entry (DT_JMPREL, 0))
3028 return FALSE;
3029 }
3030
3031 if (relocs)
3032 {
3033 if (!add_dynamic_entry (DT_RELA, 0)
3034 || !add_dynamic_entry (DT_RELASZ, 0)
3035 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3036 return FALSE;
3037
3038 /* If any dynamic relocs apply to a read-only section,
3039 then we need a DT_TEXTREL entry. */
3040 if ((info->flags & DF_TEXTREL) == 0)
3041 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3042
3043 if ((info->flags & DF_TEXTREL) != 0)
3044 {
3045 if (!add_dynamic_entry (DT_TEXTREL, 0))
3046 return FALSE;
3047 }
3048 }
3049 }
3050#undef add_dynamic_entry
3051
3052 return TRUE;
3053}
3054
3055/* Finish up dynamic symbol handling. We set the contents of various
3056 dynamic sections here. */
3057
3058static bfd_boolean
3059elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3060 struct bfd_link_info *info,
3061 struct elf_link_hash_entry *eh,
3062 Elf_Internal_Sym *sym)
3063{
3064 struct elf_metag_link_hash_table *htab;
3065 Elf_Internal_Rela rel;
3066 bfd_byte *loc;
3067
3068 htab = metag_link_hash_table (info);
3069
3070 if (eh->plt.offset != (bfd_vma) -1)
3071 {
3072 asection *splt;
3073 asection *sgot;
3074 asection *srela;
3075
3076 bfd_vma plt_index;
3077 bfd_vma got_offset;
3078 bfd_vma got_entry;
3079
3080 if (eh->plt.offset & 1)
3081 abort ();
3082
3083 BFD_ASSERT (eh->dynindx != -1);
3084
ce558b89
AM		 3085 splt = htab->etab.splt;
3086 sgot = htab->etab.sgotplt;
3087 srela = htab->etab.srelplt;
a3c62988
NC		 3088 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3089
3090 /* Get the index in the procedure linkage table which
3091 corresponds to this symbol. This is the index of this symbol
3092 in all the symbols for which we are making plt entries. The
3093 first entry in the procedure linkage table is reserved. */
3094 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3095
3096 /* Get the offset into the .got.plt table of the entry that
3097 corresponds to this function. */
3098 got_offset = plt_index * GOT_ENTRY_SIZE;
3099
3100 BFD_ASSERT (got_offset < (1 << 16));
3101
3102 got_entry = sgot->output_section->vma
3103 + sgot->output_offset
3104 + got_offset;
3105
3106 BFD_ASSERT (plt_index < (1 << 16));
3107
3108 /* Fill in the entry in the procedure linkage table. */
0e1862bb 3109 if (! bfd_link_pic (info))
a3c62988
NC		 3110 {
3111 bfd_put_32 (output_bfd,
3112 (plt_entry[0]
3113 | (((got_entry >> 16) & 0xffff) << 3)),
3114 splt->contents + eh->plt.offset);
3115 bfd_put_32 (output_bfd,
3116 (plt_entry[1]
3117 | ((got_entry & 0xffff) << 3)),
3118 splt->contents + eh->plt.offset + 4);
3119 bfd_put_32 (output_bfd, plt_entry[2],
3120 splt->contents + eh->plt.offset + 8);
3121 bfd_put_32 (output_bfd,
3122 (plt_entry[3] | (plt_index << 3)),
3123 splt->contents + eh->plt.offset + 12);
3124 bfd_put_32 (output_bfd,
3125 (plt_entry[4]
3126 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3127 splt->contents + eh->plt.offset + 16);
3128 }
3129 else
3130 {
3131 bfd_vma addr = got_entry - (splt->output_section->vma +
3132 splt->output_offset + eh->plt.offset);
3133
3134 bfd_put_32 (output_bfd,
3135 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3136 splt->contents + eh->plt.offset);
3137 bfd_put_32 (output_bfd,
3138 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3139 splt->contents + eh->plt.offset + 4);
3140 bfd_put_32 (output_bfd, plt_pic_entry[2],
3141 splt->contents + eh->plt.offset + 8);
3142 bfd_put_32 (output_bfd,
3143 (plt_pic_entry[3] | (plt_index << 3)),
3144 splt->contents + eh->plt.offset + 12);
3145 bfd_put_32 (output_bfd,
3146 (plt_pic_entry[4]
3147 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3148 splt->contents + eh->plt.offset + 16);
3149 }
3150
3151 /* Fill in the entry in the global offset table. */
3152 bfd_put_32 (output_bfd,
3153 (splt->output_section->vma
3154 + splt->output_offset
3155 + eh->plt.offset
3156 + 12), /* offset within PLT entry */
3157 sgot->contents + got_offset);
3158
3159 /* Fill in the entry in the .rela.plt section. */
3160 rel.r_offset = (sgot->output_section->vma
3161 + sgot->output_offset
3162 + got_offset);
3163 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3164 rel.r_addend = 0;
ce558b89 3165 loc = htab->etab.srelplt->contents;
a3c62988
NC		 3166 loc += plt_index * sizeof(Elf32_External_Rela);
3167 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3168
3169 if (!eh->def_regular)
3170 {
3171 /* Mark the symbol as undefined, rather than as defined in
3172 the .plt section. Leave the value alone. */
3173 sym->st_shndx = SHN_UNDEF;
3174 }
3175 }
3176
3177 if (eh->got.offset != (bfd_vma) -1
3178 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3179 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3180 {
3181 /* This symbol has an entry in the global offset table. Set it
3182 up. */
3183
3184 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
ce558b89
AM		 3185 + htab->etab.sgot->output_offset
3186 + htab->etab.sgot->output_section->vma);
a3c62988
NC		 3187
3188 /* If this is a -Bsymbolic link and the symbol is defined
3189 locally or was forced to be local because of a version file,
3190 we just want to emit a RELATIVE reloc. The entry in the
3191 global offset table will already have been initialized in the
3192 relocate_section function. */
0e1862bb 3193 if (bfd_link_pic (info)
a3c62988
NC		 3194 && (info->symbolic || eh->dynindx == -1)
3195 && eh->def_regular)
3196 {
3197 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3198 rel.r_addend = (eh->root.u.def.value
3199 + eh->root.u.def.section->output_offset
3200 + eh->root.u.def.section->output_section->vma);
3201 }
3202 else
3203 {
3204 if ((eh->got.offset & 1) != 0)
3205 abort ();
ce558b89 3206 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset);
a3c62988
NC		 3207 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3208 rel.r_addend = 0;
3209 }
3210
ce558b89
AM		 3211 loc = htab->etab.srelgot->contents;
3212 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
a3c62988
NC		 3213 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3214 }
3215
3216 if (eh->needs_copy)
3217 {
3218 asection *s;
3219
3220 /* This symbol needs a copy reloc. Set it up. */
3221
3222 if (! (eh->dynindx != -1
3223 && (eh->root.type == bfd_link_hash_defined
3224 || eh->root.type == bfd_link_hash_defweak)))
3225 abort ();
3226
a3c62988
NC		 3227 rel.r_offset = (eh->root.u.def.value
3228 + eh->root.u.def.section->output_offset
3229 + eh->root.u.def.section->output_section->vma);
3230 rel.r_addend = 0;
3231 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
afbf7e8e 3232 if (eh->root.u.def.section == htab->etab.sdynrelro)
5474d94f
AM		 3233 s = htab->etab.sreldynrelro;
3234 else
3235 s = htab->etab.srelbss;
a3c62988
NC		 3236 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3237 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3238 }
3239
3240 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3241 if (eh->root.root.string[0] == '_'
3242 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3243 || eh == htab->etab.hgot))
3244 {
3245 sym->st_shndx = SHN_ABS;
3246 }
3247
3248 return TRUE;
3249}
3250
3251/* Set the Meta ELF ABI version. */
3252
3253static void
df3ce959 3254elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
a3c62988
NC		 3255{
3256 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3257
df3ce959 3258 _bfd_elf_post_process_headers (abfd, link_info);
a3c62988
NC		 3259 i_ehdrp = elf_elfheader (abfd);
3260 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3261}
3262
3263/* Used to decide how to sort relocs in an optimal manner for the
3264 dynamic linker, before writing them out. */
3265
3266static enum elf_reloc_type_class
7e612e98
AM		 3267elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3268 const asection *rel_sec ATTRIBUTE_UNUSED,
3269 const Elf_Internal_Rela *rela)
a3c62988
NC		 3270{
3271 switch ((int) ELF32_R_TYPE (rela->r_info))
3272 {
3273 case R_METAG_RELATIVE:
3274 return reloc_class_relative;
3275 case R_METAG_JMP_SLOT:
3276 return reloc_class_plt;
3277 case R_METAG_COPY:
3278 return reloc_class_copy;
3279 default:
3280 return reloc_class_normal;
3281 }
3282}
3283
3284/* Finish up the dynamic sections. */
3285
3286static bfd_boolean
3287elf_metag_finish_dynamic_sections (bfd *output_bfd,
3288 struct bfd_link_info *info)
3289{
3290 bfd *dynobj;
3291 struct elf_metag_link_hash_table *htab;
3292 asection *sdyn;
3293
3294 htab = metag_link_hash_table (info);
3295 dynobj = htab->etab.dynobj;
3296
ad1fc92a 3297 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
a3c62988
NC		 3298
3299 if (htab->etab.dynamic_sections_created)
3300 {
3301 asection *splt;
3302 Elf32_External_Dyn *dyncon, *dynconend;
3303
3304 if (sdyn == NULL)
3305 abort ();
3306
3307 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3308 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3309 for (; dyncon < dynconend; dyncon++)
3310 {
3311 Elf_Internal_Dyn dyn;
3312 asection *s;
3313
3314 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3315
3316 switch (dyn.d_tag)
3317 {
3318 default:
3319 continue;
3320
3321 case DT_PLTGOT:
ce558b89 3322 s = htab->etab.sgot;
4ade44b7 3323 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a3c62988
NC		 3324 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3325 break;
3326
3327 case DT_JMPREL:
ce558b89 3328 s = htab->etab.srelplt;
4ade44b7 3329 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a3c62988
NC		 3330 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3331 break;
3332
3333 case DT_PLTRELSZ:
ce558b89 3334 s = htab->etab.srelplt;
a3c62988
NC		 3335 dyn.d_un.d_val = s->size;
3336 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3337 break;
a3c62988
NC		 3338 }
3339
3340 }
3341
3342 /* Fill in the first entry in the procedure linkage table. */
ce558b89 3343 splt = htab->etab.splt;
a3c62988
NC		 3344 if (splt && splt->size > 0)
3345 {
3346 unsigned long addr;
3347 /* addr = .got + 4 */
ce558b89
AM		 3348 addr = (htab->etab.sgot->output_section->vma
3349 + htab->etab.sgot->output_offset + 4);
0e1862bb 3350 if (bfd_link_pic (info))
a3c62988
NC		 3351 {
3352 addr -= splt->output_section->vma + splt->output_offset;
3353 bfd_put_32 (output_bfd,
3354 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3355 splt->contents);
3356 bfd_put_32 (output_bfd,
3357 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3358 splt->contents + 4);
3359 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3360 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3361 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3362 }
3363 else
3364 {
3365 bfd_put_32 (output_bfd,
3366 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3367 splt->contents);
3368 bfd_put_32 (output_bfd,
3369 plt0_entry[1] | ((addr & 0xffff) << 3),
3370 splt->contents + 4);
3371 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3372 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3373 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3374 }
3375
3376 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3377 PLT_ENTRY_SIZE;
3378 }
3379 }
3380
ce558b89 3381 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
a3c62988
NC		 3382 {
3383 /* Fill in the first entry in the global offset table.
3384 We use it to point to our dynamic section, if we have one. */
3385 bfd_put_32 (output_bfd,
3386 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
ce558b89 3387 htab->etab.sgot->contents);
a3c62988
NC		 3388
3389 /* The second entry is reserved for use by the dynamic linker. */
ce558b89 3390 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
a3c62988
NC		 3391
3392 /* Set .got entry size. */
ce558b89 3393 elf_section_data (htab->etab.sgot->output_section)
a3c62988
NC		 3394 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3395 }
3396
3397 return TRUE;
3398}
3399
3400/* Return the section that should be marked against GC for a given
3401 relocation. */
3402
3403static asection *
3404elf_metag_gc_mark_hook (asection *sec,
3405 struct bfd_link_info *info,
3406 Elf_Internal_Rela *rela,
3407 struct elf_link_hash_entry *hh,
3408 Elf_Internal_Sym *sym)
3409{
3410 if (hh != NULL)
3411 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3412 {
3413 case R_METAG_GNU_VTINHERIT:
3414 case R_METAG_GNU_VTENTRY:
3415 return NULL;
3416 }
3417
3418 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3419}
3420
3421/* Update the got and plt entry reference counts for the section being
3422 removed. */
3423
3424static bfd_boolean
3425elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3426 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3427 asection *sec ATTRIBUTE_UNUSED,
3428 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3429{
3430 Elf_Internal_Shdr *symtab_hdr;
3431 struct elf_link_hash_entry **eh_syms;
3432 bfd_signed_vma *local_got_refcounts;
3433 bfd_signed_vma *local_plt_refcounts;
3434 const Elf_Internal_Rela *rel, *relend;
3435
0e1862bb 3436 if (bfd_link_relocatable (info))
a3c62988
NC		 3437 return TRUE;
3438
3439 elf_section_data (sec)->local_dynrel = NULL;
3440
3441 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3442 eh_syms = elf_sym_hashes (abfd);
3443 local_got_refcounts = elf_local_got_refcounts (abfd);
3444 local_plt_refcounts = local_got_refcounts;
3445 if (local_plt_refcounts != NULL)
3446 local_plt_refcounts += symtab_hdr->sh_info;
3447
3448 relend = relocs + sec->reloc_count;
3449 for (rel = relocs; rel < relend; rel++)
3450 {
3451 unsigned long r_symndx;
3452 unsigned int r_type;
3453 struct elf_link_hash_entry *eh = NULL;
3454
3455 r_symndx = ELF32_R_SYM (rel->r_info);
3456 if (r_symndx >= symtab_hdr->sh_info)
3457 {
3458 struct elf_metag_link_hash_entry *hh;
3459 struct elf_metag_dyn_reloc_entry **hdh_pp;
3460 struct elf_metag_dyn_reloc_entry *hdh_p;
3461
3462 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3463 while (eh->root.type == bfd_link_hash_indirect
3464 || eh->root.type == bfd_link_hash_warning)
3465 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3466 hh = (struct elf_metag_link_hash_entry *) eh;
3467
3468 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3469 hdh_pp = &hdh_p->hdh_next)
3470 if (hdh_p->sec == sec)
3471 {
3472 /* Everything must go for SEC. */
3473 *hdh_pp = hdh_p->hdh_next;
3474 break;
3475 }
3476 }
3477
3478 r_type = ELF32_R_TYPE (rel->r_info);
3479 switch (r_type)
3480 {
3481 case R_METAG_TLS_LDM:
3482 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3483 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3484 break;
3485 case R_METAG_TLS_IE:
3486 case R_METAG_TLS_GD:
3487 case R_METAG_GETSET_GOT:
3488 if (eh != NULL)
3489 {
3490 if (eh->got.refcount > 0)
3491 eh->got.refcount -= 1;
3492 }
3493 else if (local_got_refcounts != NULL)
3494 {
3495 if (local_got_refcounts[r_symndx] > 0)
3496 local_got_refcounts[r_symndx] -= 1;
3497 }
3498 break;
3499
3500 case R_METAG_RELBRANCH_PLT:
3501 if (eh != NULL)
3502 {
3503 if (eh->plt.refcount > 0)
3504 eh->plt.refcount -= 1;
3505 }
3506 break;
3507
3508 case R_METAG_ADDR32:
3509 case R_METAG_HIADDR16:
3510 case R_METAG_LOADDR16:
3511 case R_METAG_GETSETOFF:
3512 case R_METAG_RELBRANCH:
3513 if (eh != NULL)
3514 {
3515 struct elf_metag_link_hash_entry *hh;
3516 struct elf_metag_dyn_reloc_entry **hdh_pp;
3517 struct elf_metag_dyn_reloc_entry *hdh_p;
3518
0e1862bb 3519 if (!bfd_link_pic (info) && eh->plt.refcount > 0)
a3c62988
NC		 3520 eh->plt.refcount -= 1;
3521
3522 hh = (struct elf_metag_link_hash_entry *) eh;
3523
3524 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3525 hdh_pp = &hdh_p->hdh_next)
3526 if (hdh_p->sec == sec)
3527 {
3528 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3529 hdh_p->relative_count -= 1;
3530 hdh_p->count -= 1;
3531 if (hdh_p->count == 0)
3532 *hdh_pp = hdh_p->hdh_next;
3533 break;
3534 }
3535 }
3536 break;
3537
3538 default:
3539 break;
3540 }
3541 }
3542
3543 return TRUE;
3544}
3545
3546/* Determine the type of stub needed, if any, for a call. */
3547
3548static enum elf_metag_stub_type
3549metag_type_of_stub (asection *input_sec,
3550 const Elf_Internal_Rela *rel,
3551 struct elf_metag_link_hash_entry *hh,
3552 bfd_vma destination,
3553 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3554{
3555 bfd_vma location;
3556 bfd_vma branch_offset;
3557 bfd_vma max_branch_offset;
3558
3559 if (hh != NULL &&
3560 !(hh->eh.root.type == bfd_link_hash_defined
3561 || hh->eh.root.type == bfd_link_hash_defweak))
3562 return metag_stub_none;
3563
3564 /* Determine where the call point is. */
3565 location = (input_sec->output_offset
3566 + input_sec->output_section->vma
3567 + rel->r_offset);
3568
3569 branch_offset = destination - location;
3570
3571 /* Determine if a long branch stub is needed. Meta branch offsets
3572 are signed 19 bits 4 byte aligned. */
3573 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3574
3575 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3576 {
0e1862bb 3577 if (bfd_link_pic (info))
a3c62988
NC		 3578 return metag_stub_long_branch_shared;
3579 else
3580 return metag_stub_long_branch;
3581 }
3582
3583 return metag_stub_none;
3584}
3585
3586#define MOVT_A0_3 0x82180005
3587#define JUMP_A0_3 0xac180003
3588
3589#define MOVT_A1LBP 0x83080005
3590#define ADD_A1LBP 0x83080000
3591
3592#define ADDT_A0_3_CPC 0x82980001
3593#define ADD_A0_3_A0_3 0x82180000
3594#define MOV_PC_A0_3 0xa3180ca0
3595
3596static bfd_boolean
3597metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3598{
3599 struct elf_metag_stub_hash_entry *hsh;
3600 asection *stub_sec;
3601 bfd *stub_bfd;
3602 bfd_byte *loc;
3603 bfd_vma sym_value;
3604 int size;
3605
3606 /* Massage our args to the form they really have. */
3607 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3608
3609 stub_sec = hsh->stub_sec;
3610
3611 /* Make a note of the offset within the stubs for this entry. */
3612 hsh->stub_offset = stub_sec->size;
3613 loc = stub_sec->contents + hsh->stub_offset;
3614
3615 stub_bfd = stub_sec->owner;
3616
3617 switch (hsh->stub_type)
3618 {
3619 case metag_stub_long_branch_shared:
3620 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3621 calculate the jump target using A0.3 as a temporary. Then a MOV
3622 to PC carries out the jump. */
3623 sym_value = (hsh->target_value
3624 + hsh->target_section->output_offset
3625 + hsh->target_section->output_section->vma
3626 + hsh->addend);
3627
3628 sym_value -= (hsh->stub_offset
3629 + stub_sec->output_offset
3630 + stub_sec->output_section->vma);
3631
3632 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3633 loc);
3634
3635 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3636 loc + 4);
3637
3638 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3639
3640 size = 12;
3641 break;
3642 case metag_stub_long_branch:
3643 /* A standard long branch stub is a MOVT instruction followed by a
3644 JUMP instruction using the A0.3 register as a temporary. This is
3645 the same method used by the LDLK linker (patch.c). */
3646 sym_value = (hsh->target_value
3647 + hsh->target_section->output_offset
3648 + hsh->target_section->output_section->vma
3649 + hsh->addend);
3650
3651 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3652 loc);
3653
3654 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3655
3656 size = 8;
3657 break;
3658 default:
3659 BFD_FAIL ();
3660 return FALSE;
3661 }
3662
3663 stub_sec->size += size;
3664 return TRUE;
3665}
3666
3667/* As above, but don't actually build the stub. Just bump offset so
3668 we know stub section sizes. */
3669
3670static bfd_boolean
3671metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3672{
3673 struct elf_metag_stub_hash_entry *hsh;
3674 int size = 0;
3675
3676 /* Massage our args to the form they really have. */
3677 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3678
3679 if (hsh->stub_type == metag_stub_long_branch)
3680 size = 8;
3681 else if (hsh->stub_type == metag_stub_long_branch_shared)
3682 size = 12;
3683
3684 hsh->stub_sec->size += size;
3685 return TRUE;
3686}
3687
3688/* Set up various things so that we can make a list of input sections
3689 for each output section included in the link. Returns -1 on error,
3690 0 when no stubs will be needed, and 1 on success. */
3691
3692int
3693elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3694{
3695 bfd *input_bfd;
3696 unsigned int bfd_count;
7292b3ac 3697 unsigned int top_id, top_index;
a3c62988
NC		 3698 asection *section;
3699 asection **input_list, **list;
3700 bfd_size_type amt;
3701 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3702
3703 /* Count the number of input BFDs and find the top input section id. */
3704 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3705 input_bfd != NULL;
c72f2fb2 3706 input_bfd = input_bfd->link.next)
a3c62988
NC		 3707 {
3708 bfd_count += 1;
3709 for (section = input_bfd->sections;
3710 section != NULL;
3711 section = section->next)
3712 {
3713 if (top_id < section->id)
3714 top_id = section->id;
3715 }
3716 }
3717
3718 htab->bfd_count = bfd_count;
3719
3720 amt = sizeof (struct map_stub) * (top_id + 1);
3721 htab->stub_group = bfd_zmalloc (amt);
3722 if (htab->stub_group == NULL)
3723 return -1;
3724
3725 /* We can't use output_bfd->section_count here to find the top output
3726 section index as some sections may have been removed, and
3727 strip_excluded_output_sections doesn't renumber the indices. */
3728 for (section = output_bfd->sections, top_index = 0;
3729 section != NULL;
3730 section = section->next)
3731 {
3732 if (top_index < section->index)
3733 top_index = section->index;
3734 }
3735
3736 htab->top_index = top_index;
3737 amt = sizeof (asection *) * (top_index + 1);
3738 input_list = bfd_malloc (amt);
3739 htab->input_list = input_list;
3740 if (input_list == NULL)
3741 return -1;
3742
3743 /* For sections we aren't interested in, mark their entries with a
3744 value we can check later. */
3745 list = input_list + top_index;
3746 do
3747 *list = bfd_abs_section_ptr;
3748 while (list-- != input_list);
3749
3750 for (section = output_bfd->sections;
3751 section != NULL;
3752 section = section->next)
3753 {
3754 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3755 * have PC relative relocs in them but no code flag set. */
3756 if (((section->flags & SEC_CODE) != 0) ||
3757 strcmp(".ctors", section->name) ||
3758 strcmp(".dtors", section->name))
3759 input_list[section->index] = NULL;
3760 }
3761
3762 return 1;
3763}
3764
3765/* The linker repeatedly calls this function for each input section,
3766 in the order that input sections are linked into output sections.
3767 Build lists of input sections to determine groupings between which
3768 we may insert linker stubs. */
3769
3770void
3771elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3772{
3773 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3774
3775 if (isec->output_section->index <= htab->top_index)
3776 {
3777 asection **list = htab->input_list + isec->output_section->index;
3778 if (*list != bfd_abs_section_ptr)
3779 {
3780 /* Steal the link_sec pointer for our list. */
3781#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3782 /* This happens to make the list in reverse order,
3783 which is what we want. */
3784 PREV_SEC (isec) = *list;
3785 *list = isec;
3786 }
3787 }
3788}
3789
3790/* See whether we can group stub sections together. Grouping stub
3791 sections may result in fewer stubs. More importantly, we need to
3792 put all .init* and .fini* stubs at the beginning of the .init or
3793 .fini output sections respectively, because glibc splits the
3794 _init and _fini functions into multiple parts. Putting a stub in
3795 the middle of a function is not a good idea. */
3796
3797static void
3798group_sections (struct elf_metag_link_hash_table *htab,
3799 bfd_size_type stub_group_size,
3800 bfd_boolean stubs_always_before_branch)
3801{
3802 asection **list = htab->input_list + htab->top_index;
3803 do
3804 {
3805 asection *tail = *list;
3806 if (tail == bfd_abs_section_ptr)
3807 continue;
3808 while (tail != NULL)
3809 {
3810 asection *curr;
3811 asection *prev;
3812 bfd_size_type total;
3813 bfd_boolean big_sec;
3814
3815 curr = tail;
3816 total = tail->size;
3817 big_sec = total >= stub_group_size;
3818
3819 while ((prev = PREV_SEC (curr)) != NULL
3820 && ((total += curr->output_offset - prev->output_offset)
3821 < stub_group_size))
3822 curr = prev;
3823
3824 /* OK, the size from the start of CURR to the end is less
3825 than stub_group_size bytes and thus can be handled by one stub
3826 section. (or the tail section is itself larger than
3827 stub_group_size bytes, in which case we may be toast.)
3828 We should really be keeping track of the total size of
3829 stubs added here, as stubs contribute to the final output
3830 section size. */
3831 do
3832 {
3833 prev = PREV_SEC (tail);
3834 /* Set up this stub group. */
3835 htab->stub_group[tail->id].link_sec = curr;
3836 }
3837 while (tail != curr && (tail = prev) != NULL);
3838
3839 /* But wait, there's more! Input sections up to stub_group_size
3840 bytes before the stub section can be handled by it too.
3841 Don't do this if we have a really large section after the
3842 stubs, as adding more stubs increases the chance that
3843 branches may not reach into the stub section. */
3844 if (!stubs_always_before_branch && !big_sec)
3845 {
3846 total = 0;
3847 while (prev != NULL
3848 && ((total += tail->output_offset - prev->output_offset)
3849 < stub_group_size))
3850 {
3851 tail = prev;
3852 prev = PREV_SEC (tail);
3853 htab->stub_group[tail->id].link_sec = curr;
3854 }
3855 }
3856 tail = prev;
3857 }
3858 }
3859 while (list-- != htab->input_list);
3860 free (htab->input_list);
3861#undef PREV_SEC
3862}
3863
3864/* Read in all local syms for all input bfds.
3865 Returns -1 on error, 0 otherwise. */
3866
3867static int
3868get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3869 struct bfd_link_info *info)
3870{
3871 unsigned int bfd_indx;
3872 Elf_Internal_Sym *local_syms, **all_local_syms;
3873 int stub_changed = 0;
3874 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3875
3876 /* We want to read in symbol extension records only once. To do this
3877 we need to read in the local symbols in parallel and save them for
3878 later use; so hold pointers to the local symbols in an array. */
3879 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3880 all_local_syms = bfd_zmalloc (amt);
3881 htab->all_local_syms = all_local_syms;
3882 if (all_local_syms == NULL)
3883 return -1;
3884
3885 /* Walk over all the input BFDs, swapping in local symbols. */
3886 for (bfd_indx = 0;
3887 input_bfd != NULL;
c72f2fb2 3888 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3889 {
3890 Elf_Internal_Shdr *symtab_hdr;
3891
3892 /* We'll need the symbol table in a second. */
3893 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3894 if (symtab_hdr->sh_info == 0)
3895 continue;
3896
3897 /* We need an array of the local symbols attached to the input bfd. */
3898 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3899 if (local_syms == NULL)
3900 {
3901 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3902 symtab_hdr->sh_info, 0,
3903 NULL, NULL, NULL);
3904 /* Cache them for elf_link_input_bfd. */
3905 symtab_hdr->contents = (unsigned char *) local_syms;
3906 }
3907 if (local_syms == NULL)
3908 return -1;
3909
3910 all_local_syms[bfd_indx] = local_syms;
3911 }
3912
3913 return stub_changed;
3914}
3915
3916/* Determine and set the size of the stub section for a final link.
3917
3918The basic idea here is to examine all the relocations looking for
3919PC-relative calls to a target that is unreachable with a "CALLR"
3920instruction. */
3921
3922/* See elf32-hppa.c and elf64-ppc.c. */
3923
3924bfd_boolean
3925elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3926 struct bfd_link_info *info,
3927 bfd_signed_vma group_size,
3928 asection * (*add_stub_section) (const char *, asection *),
3929 void (*layout_sections_again) (void))
3930{
3931 bfd_size_type stub_group_size;
3932 bfd_boolean stubs_always_before_branch;
3933 bfd_boolean stub_changed;
3934 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3935
3936 /* Stash our params away. */
3937 htab->stub_bfd = stub_bfd;
3938 htab->add_stub_section = add_stub_section;
3939 htab->layout_sections_again = layout_sections_again;
3940 stubs_always_before_branch = group_size < 0;
3941 if (group_size < 0)
3942 stub_group_size = -group_size;
3943 else
3944 stub_group_size = group_size;
3945 if (stub_group_size == 1)
3946 {
3947 /* Default values. */
3948 /* FIXME: not sure what these values should be */
3949 if (stubs_always_before_branch)
3950 {
3951 stub_group_size = (1 << BRANCH_BITS);
3952 }
3953 else
3954 {
3955 stub_group_size = (1 << BRANCH_BITS);
3956 }
3957 }
3958
3959 group_sections (htab, stub_group_size, stubs_always_before_branch);
3960
3961 switch (get_local_syms (output_bfd, info->input_bfds, info))
3962 {
3963 default:
3964 if (htab->all_local_syms)
3965 goto error_ret_free_local;
3966 return FALSE;
3967
3968 case 0:
3969 stub_changed = FALSE;
3970 break;
3971
3972 case 1:
3973 stub_changed = TRUE;
3974 break;
3975 }
3976
3977 while (1)
3978 {
3979 bfd *input_bfd;
3980 unsigned int bfd_indx;
3981 asection *stub_sec;
3982
3983 for (input_bfd = info->input_bfds, bfd_indx = 0;
3984 input_bfd != NULL;
c72f2fb2 3985 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3986 {
3987 Elf_Internal_Shdr *symtab_hdr;
3988 asection *section;
3989 Elf_Internal_Sym *local_syms;
3990
3991 /* We'll need the symbol table in a second. */
3992 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3993 if (symtab_hdr->sh_info == 0)
3994 continue;
3995
3996 local_syms = htab->all_local_syms[bfd_indx];
3997
3998 /* Walk over each section attached to the input bfd. */
3999 for (section = input_bfd->sections;
4000 section != NULL;
4001 section = section->next)
4002 {
4003 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4004
4005 /* If there aren't any relocs, then there's nothing more
4006 to do. */
4007 if ((section->flags & SEC_RELOC) == 0
4008 || section->reloc_count == 0)
4009 continue;
4010
4011 /* If this section is a link-once section that will be
4012 discarded, then don't create any stubs. */
4013 if (section->output_section == NULL
4014 || section->output_section->owner != output_bfd)
4015 continue;
4016
4017 /* Get the relocs. */
4018 internal_relocs
4019 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4020 info->keep_memory);
4021 if (internal_relocs == NULL)
4022 goto error_ret_free_local;
4023
4024 /* Now examine each relocation. */
4025 irela = internal_relocs;
4026 irelaend = irela + section->reloc_count;
4027 for (; irela < irelaend; irela++)
4028 {
4029 unsigned int r_type, r_indx;
4030 enum elf_metag_stub_type stub_type;
4031 struct elf_metag_stub_hash_entry *hsh;
4032 asection *sym_sec;
4033 bfd_vma sym_value;
4034 bfd_vma destination;
4035 struct elf_metag_link_hash_entry *hh;
4036 char *stub_name;
4037 const asection *id_sec;
4038
4039 r_type = ELF32_R_TYPE (irela->r_info);
4040 r_indx = ELF32_R_SYM (irela->r_info);
4041
4042 if (r_type >= (unsigned int) R_METAG_MAX)
4043 {
4044 bfd_set_error (bfd_error_bad_value);
4045 error_ret_free_internal:
4046 if (elf_section_data (section)->relocs == NULL)
4047 free (internal_relocs);
4048 goto error_ret_free_local;
4049 }
4050
4051 /* Only look for stubs on CALLR and B instructions. */
4052 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4053 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4054 continue;
4055
4056 /* Now determine the call target, its name, value,
4057 section. */
4058 sym_sec = NULL;
4059 sym_value = 0;
4060 destination = 0;
4061 hh = NULL;
4062 if (r_indx < symtab_hdr->sh_info)
4063 {
4064 /* It's a local symbol. */
4065 Elf_Internal_Sym *sym;
4066 Elf_Internal_Shdr *hdr;
4067 unsigned int shndx;
4068
4069 sym = local_syms + r_indx;
4070 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4071 sym_value = sym->st_value;
4072 shndx = sym->st_shndx;
4073 if (shndx < elf_numsections (input_bfd))
4074 {
4075 hdr = elf_elfsections (input_bfd)[shndx];
4076 sym_sec = hdr->bfd_section;
4077 destination = (sym_value + irela->r_addend
4078 + sym_sec->output_offset
4079 + sym_sec->output_section->vma);
4080 }
4081 }
4082 else
4083 {
4084 /* It's an external symbol. */
4085 int e_indx;
4086
4087 e_indx = r_indx - symtab_hdr->sh_info;
4088 hh = ((struct elf_metag_link_hash_entry *)
4089 elf_sym_hashes (input_bfd)[e_indx]);
4090
4091 while (hh->eh.root.type == bfd_link_hash_indirect
4092 || hh->eh.root.type == bfd_link_hash_warning)
4093 hh = ((struct elf_metag_link_hash_entry *)
4094 hh->eh.root.u.i.link);
4095
4096 if (hh->eh.root.type == bfd_link_hash_defined
4097 || hh->eh.root.type == bfd_link_hash_defweak)
4098 {
4099 sym_sec = hh->eh.root.u.def.section;
4100 sym_value = hh->eh.root.u.def.value;
4101 if (hh->eh.plt.offset != (bfd_vma) -1
4102 && hh->eh.dynindx != -1
4103 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4104 {
ce558b89 4105 sym_sec = htab->etab.splt;
a3c62988
NC		 4106 sym_value = hh->eh.plt.offset;
4107 }
4108
4109 if (sym_sec->output_section != NULL)
4110 destination = (sym_value + irela->r_addend
4111 + sym_sec->output_offset
4112 + sym_sec->output_section->vma);
4113 else
4114 continue;
4115 }
4116 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4117 {
0e1862bb 4118 if (! bfd_link_pic (info))
a3c62988
NC		 4119 continue;
4120 }
4121 else if (hh->eh.root.type == bfd_link_hash_undefined)
4122 {
4123 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4124 && (ELF_ST_VISIBILITY (hh->eh.other)
4125 == STV_DEFAULT)))
4126 continue;
4127 }
4128 else
4129 {
4130 bfd_set_error (bfd_error_bad_value);
4131 goto error_ret_free_internal;
4132 }
4133 }
4134
4135 /* Determine what (if any) linker stub is needed. */
4136 stub_type = metag_type_of_stub (section, irela, hh,
4137 destination, info);
4138 if (stub_type == metag_stub_none)
4139 continue;
4140
4141 /* Support for grouping stub sections. */
4142 id_sec = htab->stub_group[section->id].link_sec;
4143
4144 /* Get the name of this stub. */
4145 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4146 if (!stub_name)
4147 goto error_ret_free_internal;
4148
4149 hsh = metag_stub_hash_lookup (&htab->bstab,
4150 stub_name,
4151 FALSE, FALSE);
4152 if (hsh != NULL)
4153 {
4154 /* The proper stub has already been created. */
4155 free (stub_name);
4156 continue;
4157 }
4158
4159 hsh = metag_add_stub (stub_name, section, htab);
4160 if (hsh == NULL)
4161 {
4162 free (stub_name);
4163 goto error_ret_free_internal;
4164 }
4165 hsh->target_value = sym_value;
4166 hsh->target_section = sym_sec;
4167 hsh->stub_type = stub_type;
4168 hsh->hh = hh;
4169 hsh->addend = irela->r_addend;
4170 stub_changed = TRUE;
4171 }
4172
4173 /* We're done with the internal relocs, free them. */
4174 if (elf_section_data (section)->relocs == NULL)
4175 free (internal_relocs);
4176 }
4177 }
4178
4179 if (!stub_changed)
4180 break;
4181
4182 /* OK, we've added some stubs. Find out the new size of the
4183 stub sections. */
4184 for (stub_sec = htab->stub_bfd->sections;
4185 stub_sec != NULL;
4186 stub_sec = stub_sec->next)
4187 stub_sec->size = 0;
4188
4189 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4190
4191 /* Ask the linker to do its stuff. */
4192 (*htab->layout_sections_again) ();
4193 stub_changed = FALSE;
4194 }
4195
4196 free (htab->all_local_syms);
4197 return TRUE;
4198
4199 error_ret_free_local:
4200 free (htab->all_local_syms);
4201 return FALSE;
4202}
4203
4204/* Build all the stubs associated with the current output file. The
4205 stubs are kept in a hash table attached to the main linker hash
4206 table. This function is called via metagelf_finish in the linker. */
4207
4208bfd_boolean
4209elf_metag_build_stubs (struct bfd_link_info *info)
4210{
4211 asection *stub_sec;
4212 struct bfd_hash_table *table;
4213 struct elf_metag_link_hash_table *htab;
4214
4215 htab = metag_link_hash_table (info);
4216
4217 for (stub_sec = htab->stub_bfd->sections;
4218 stub_sec != NULL;
4219 stub_sec = stub_sec->next)
4220 {
4221 bfd_size_type size;
4222
4223 /* Allocate memory to hold the linker stubs. */
4224 size = stub_sec->size;
4225 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4226 if (stub_sec->contents == NULL && size != 0)
4227 return FALSE;
4228 stub_sec->size = 0;
4229 }
4230
4231 /* Build the stubs as directed by the stub hash table. */
4232 table = &htab->bstab;
4233 bfd_hash_traverse (table, metag_build_one_stub, info);
4234
4235 return TRUE;
4236}
4237
4238/* Return TRUE if SYM represents a local label symbol. */
4239
4240static bfd_boolean
4241elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4242{
4243 if (name[0] == '$' && name[1] == 'L')
4244 return 1;
4245 return _bfd_elf_is_local_label_name (abfd, name);
4246}
4247
4248/* Return address for Ith PLT stub in section PLT, for relocation REL
4249 or (bfd_vma) -1 if it should not be included. */
4250
4251static bfd_vma
4252elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4253 const arelent *rel ATTRIBUTE_UNUSED)
4254{
4255 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4256}
4257
4258#define ELF_ARCH bfd_arch_metag
4259#define ELF_TARGET_ID METAG_ELF_DATA
4260#define ELF_MACHINE_CODE EM_METAG
4261#define ELF_MINPAGESIZE 0x1000
4262#define ELF_MAXPAGESIZE 0x4000
4263#define ELF_COMMONPAGESIZE 0x1000
4264
6d00b590 4265#define TARGET_LITTLE_SYM metag_elf32_vec
a3c62988
NC		 4266#define TARGET_LITTLE_NAME "elf32-metag"
4267
4268#define elf_symbol_leading_char '_'
4269
4270#define elf_info_to_howto_rel NULL
4271#define elf_info_to_howto metag_info_to_howto_rela
4272
4273#define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4274#define bfd_elf32_bfd_link_hash_table_create \
4275 elf_metag_link_hash_table_create
a3c62988
NC		 4276#define elf_backend_relocate_section elf_metag_relocate_section
4277#define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4278#define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4279#define elf_backend_check_relocs elf_metag_check_relocs
4280#define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4281#define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4282#define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4283#define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4284#define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4285#define elf_backend_omit_section_dynsym \
4286 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4287#define elf_backend_post_process_headers elf_metag_post_process_headers
4288#define elf_backend_reloc_type_class elf_metag_reloc_type_class
4289#define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4290#define elf_backend_plt_sym_val elf_metag_plt_sym_val
4291
4292#define elf_backend_can_gc_sections 1
4293#define elf_backend_can_refcount 1
ce558b89
AM		 4294#define elf_backend_rela_normal 1
4295#define elf_backend_want_got_plt 1
a3c62988
NC		 4296#define elf_backend_want_got_sym 0
4297#define elf_backend_want_plt_sym 0
4298#define elf_backend_plt_readonly 1
64f52338 4299#define elf_backend_dtrel_excludes_plt 1
5474d94f 4300#define elf_backend_want_dynrelro 1
a3c62988
NC		 4301
4302#define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4303#define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4304
4305#include "elf32-target.h"
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