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readonly_dynrelocs
[thirdparty/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2017 Free Software Foundation, Inc.
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
37 static 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
46 static 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
55 static 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
64 static 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
95 static 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 */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
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
696 struct metag_reloc_map
697 {
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700 };
701
702 static 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
746 enum elf_metag_stub_type
747 {
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751 };
752
753 struct 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
782 struct 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
813 struct 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;
841 unsigned int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
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. */
859 static bfd_vma
860 dtpoff_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 */
869 static bfd_vma
870 tpoff (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
882 static void
883 metag_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);
890 if (r_type >= (unsigned int) R_METAG_MAX)
891 {
892 /* xgettext:c-format */
893 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
894 r_type = 0;
895 }
896 cache_ptr->howto = & elf_metag_howto_table [r_type];
897 }
898
899 static reloc_howto_type *
900 metag_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
912 static reloc_howto_type *
913 metag_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
948 static struct bfd_hash_entry *
949 stub_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
985 static struct bfd_hash_entry *
986 metag_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
1016 /* Free the derived linker hash table. */
1017
1018 static void
1019 elf_metag_link_hash_table_free (bfd *obfd)
1020 {
1021 struct elf_metag_link_hash_table *htab
1022 = (struct elf_metag_link_hash_table *) obfd->link.hash;
1023
1024 bfd_hash_table_free (&htab->bstab);
1025 _bfd_elf_link_hash_table_free (obfd);
1026 }
1027
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
1032 static struct bfd_link_hash_table *
1033 elf_metag_link_hash_table_create (bfd *abfd)
1034 {
1035 struct elf_metag_link_hash_table *htab;
1036 bfd_size_type amt = sizeof (*htab);
1037
1038 htab = bfd_zmalloc (amt);
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)))
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;
1059
1060 return &htab->etab.root;
1061 }
1062
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
1069 static char *
1070 metag_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
1109 static struct elf_metag_stub_hash_entry *
1110 metag_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
1155 static struct elf_metag_stub_hash_entry *
1156 metag_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 {
1197 /* xgettext:c-format */
1198 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1199 section->owner, stub_name);
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
1212 static bfd_boolean
1213 within_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
1222 static bfd_reloc_status_type
1223 metag_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 \
1413 if (bfd_link_relocatable (info) \
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
1445 The RELOCATE_SECTION function is called by the new ELF backend linker
1446 to handle the relocations for a section.
1447
1448 The relocs are always passed as Rela structures; if the section
1449 actually uses Rel structures, the r_addend field will always be
1450 zero.
1451
1452 This function is responsible for adjusting the section contents as
1453 necessary, and (if using Rela relocs and generating a relocatable
1454 output file) adjusting the reloc addend as necessary.
1455
1456 This function does not have to worry about setting the reloc
1457 address or the reloc symbol index.
1458
1459 LOCAL_SYMS is a pointer to the swapped in local symbols.
1460
1461 LOCAL_SECTIONS is an array giving the section in the input file
1462 corresponding to the st_shndx field of each local symbol.
1463
1464 The global hash table entry for the global symbols can be found
1465 via elf_sym_hashes (input_bfd).
1466
1467 When generating relocatable output, this function must handle
1468 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1469 going to be the section symbol corresponding to the output
1470 section, which means that the addend must be adjusted
1471 accordingly. */
1472
1473 static bfd_boolean
1474 elf_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;
1539 bfd_boolean unresolved_reloc, warned, ignored;
1540
1541 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1542 r_symndx, symtab_hdr, eh_syms,
1543 eh, sec, relocation,
1544 unresolved_reloc, warned, ignored);
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
1554 if (bfd_link_relocatable (info))
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
1564 if ((bfd_link_pic (info)
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)))
1569 || (!bfd_link_pic (info)
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
1658 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
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
1666 relocation = (htab->etab.splt->output_section->vma
1667 + htab->etab.splt->output_offset
1668 + hh->eh.plt.offset);
1669 break;
1670 case R_METAG_HI16_GOTPC:
1671 case R_METAG_LO16_GOTPC:
1672 BFD_ASSERT (htab->etab.sgot != NULL);
1673
1674 relocation = (htab->etab.sgot->output_section->vma +
1675 htab->etab.sgot->output_offset);
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:
1684 BFD_ASSERT (htab->etab.sgot != NULL);
1685
1686 relocation -= (htab->etab.sgot->output_section->vma +
1687 htab->etab.sgot->output_offset);
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;
1703 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1704 bfd_link_pic (info),
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 {
1744 if (bfd_link_pic (info))
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;
1751 asection *s = htab->etab.srelgot;
1752
1753 outrel.r_offset = (off
1754 + htab->etab.sgot->output_offset
1755 + htab->etab.sgot->output_section->vma);
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,
1764 htab->etab.sgot->contents + off);
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
1782 if (htab->etab.sgot == NULL)
1783 abort();
1784
1785 indx = 0;
1786 if (hh != NULL)
1787 {
1788 bfd_boolean dyn;
1789 dyn = htab->etab.dynamic_sections_created;
1790
1791 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1792 bfd_link_pic (info),
1793 &hh->eh)
1794 && (!bfd_link_pic (info)
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)
1813 abort ();
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
1828 if ((bfd_link_pic (info) || indx != 0)
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;
1834 loc = htab->etab.srelgot->contents;
1835 /* FIXME (CAO): Should this be reloc_count++ ? */
1836 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
1837 }
1838
1839 if (tls_type & GOT_TLS_GD)
1840 {
1841 if (need_relocs)
1842 {
1843 outrel.r_offset = (cur_off
1844 + htab->etab.sgot->output_section->vma
1845 + htab->etab.sgot->output_offset);
1846 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1847 outrel.r_addend = 0;
1848 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
1849
1850 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1851 htab->etab.srelgot->reloc_count++;
1852 loc += sizeof (Elf32_External_Rela);
1853
1854 if (indx == 0)
1855 bfd_put_32 (output_bfd, 0,
1856 htab->etab.sgot->contents + cur_off + 4);
1857 else
1858 {
1859 bfd_put_32 (output_bfd, 0,
1860 htab->etab.sgot->contents + cur_off + 4);
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);
1866 htab->etab.srelgot->reloc_count++;
1867 loc += sizeof (Elf32_External_Rela);
1868 }
1869 }
1870 else
1871 {
1872 /* We don't support changing the TLS model. */
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);
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;
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
1891 + htab->etab.sgot->output_section->vma
1892 + htab->etab.sgot->output_offset);
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);
1901 htab->etab.srelgot->reloc_count++;
1902 loc += sizeof (Elf32_External_Rela);
1903 }
1904 else
1905 bfd_put_32 (output_bfd, tpoff (info, relocation),
1906 htab->etab.sgot->contents + cur_off);
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:
1927 if (bfd_link_pic (info))
1928 {
1929 _bfd_error_handler
1930 /* xgettext:c-format */
1931 (_("%B(%A+%#Lx): %s relocation not permitted in shared object"),
1932 input_bfd, input_section, rel->r_offset, howto->name);
1933 return FALSE;
1934 }
1935 else
1936 relocation = tpoff (info, relocation);
1937 break;
1938 case R_METAG_TLS_LDO_HI16:
1939 case R_METAG_TLS_LDO_LO16:
1940 if (! bfd_link_pic (info))
1941 relocation = tpoff (info, relocation);
1942 else
1943 relocation -= dtpoff_base (info);
1944 break;
1945 case R_METAG_TLS_LDM:
1946 {
1947 bfd_vma off;
1948
1949 if (htab->etab.sgot == NULL)
1950 abort();
1951 off = htab->tls_ldm_got.offset;
1952 if (off & 1)
1953 off &= ~1;
1954 else
1955 {
1956 Elf_Internal_Rela outrel;
1957 bfd_byte *loc;
1958
1959 outrel.r_offset = (off
1960 + htab->etab.sgot->output_section->vma
1961 + htab->etab.sgot->output_offset);
1962
1963 outrel.r_addend = 0;
1964 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1965 loc = htab->etab.srelgot->contents;
1966 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1967 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1968 htab->tls_ldm_got.offset |= 1;
1969 }
1970
1971 relocation = off - GOT_REG_OFFSET;
1972 break;
1973 }
1974 default:
1975 break;
1976 }
1977
1978 r = metag_final_link_relocate (howto, input_bfd, input_section,
1979 contents, rel, relocation, hh, htab,
1980 sec);
1981
1982 if (r != bfd_reloc_ok)
1983 {
1984 const char * msg = (const char *) NULL;
1985
1986 switch (r)
1987 {
1988 case bfd_reloc_overflow:
1989 (*info->callbacks->reloc_overflow)
1990 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1991 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1992 break;
1993
1994 case bfd_reloc_undefined:
1995 (*info->callbacks->undefined_symbol)
1996 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1997 break;
1998
1999 case bfd_reloc_outofrange:
2000 msg = _("internal error: out of range error");
2001 break;
2002
2003 case bfd_reloc_notsupported:
2004 msg = _("internal error: unsupported relocation error");
2005 break;
2006
2007 case bfd_reloc_dangerous:
2008 msg = _("internal error: dangerous relocation");
2009 break;
2010
2011 default:
2012 msg = _("internal error: unknown error");
2013 break;
2014 }
2015
2016 if (msg)
2017 (*info->callbacks->warning) (info, msg, name, input_bfd,
2018 input_section, rel->r_offset);
2019 }
2020 }
2021
2022 return TRUE;
2023 }
2024
2025 /* Create the .plt and .got sections, and set up our hash table
2026 short-cuts to various dynamic sections. */
2027
2028 static bfd_boolean
2029 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2030 {
2031 struct elf_metag_link_hash_table *htab;
2032 struct elf_link_hash_entry *eh;
2033 struct bfd_link_hash_entry *bh;
2034 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2035
2036 /* Don't try to create the .plt and .got twice. */
2037 htab = metag_link_hash_table (info);
2038 if (htab->etab.splt != NULL)
2039 return TRUE;
2040
2041 /* Call the generic code to do most of the work. */
2042 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2043 return FALSE;
2044
2045 /* The header goes at the start of the dynamic .got section, which
2046 is placed after the dynamic .got.plt section. ie. The header is
2047 not necessarily at the start of the output .got section. */
2048 htab->etab.sgot->size += 12;
2049
2050 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
2051 bh = NULL;
2052 if (!(_bfd_generic_link_add_one_symbol
2053 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot,
2054 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2055 return FALSE;
2056 eh = (struct elf_link_hash_entry *) bh;
2057 eh->def_regular = 1;
2058 eh->type = STT_OBJECT;
2059 eh->other = STV_HIDDEN;
2060
2061 if (! bfd_link_executable (info)
2062 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2063 return FALSE;
2064
2065 htab->etab.hgot = eh;
2066
2067 return TRUE;
2068 }
2069
2070 /* Look through the relocs for a section during the first phase, and
2071 calculate needed space in the global offset table, procedure linkage
2072 table, and dynamic reloc sections. At this point we haven't
2073 necessarily read all the input files. */
2074
2075 static bfd_boolean
2076 elf_metag_check_relocs (bfd *abfd,
2077 struct bfd_link_info *info,
2078 asection *sec,
2079 const Elf_Internal_Rela *relocs)
2080 {
2081 Elf_Internal_Shdr *symtab_hdr;
2082 struct elf_link_hash_entry **eh_syms;
2083 const Elf_Internal_Rela *rel;
2084 const Elf_Internal_Rela *rel_end;
2085 struct elf_metag_link_hash_table *htab;
2086 asection *sreloc;
2087 bfd *dynobj;
2088 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2089
2090 if (bfd_link_relocatable (info))
2091 return TRUE;
2092
2093 htab = metag_link_hash_table (info);
2094 dynobj = htab->etab.dynobj;
2095 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2096 eh_syms = elf_sym_hashes (abfd);
2097 sreloc = NULL;
2098
2099 if (htab == NULL)
2100 return FALSE;
2101
2102 rel_end = relocs + sec->reloc_count;
2103 for (rel = relocs; rel < rel_end; rel++)
2104 {
2105 int r_type;
2106 struct elf_metag_link_hash_entry *hh;
2107 Elf_Internal_Sym *isym;
2108 unsigned long r_symndx;
2109
2110 r_symndx = ELF32_R_SYM (rel->r_info);
2111 r_type = ELF32_R_TYPE (rel->r_info);
2112 if (r_symndx < symtab_hdr->sh_info)
2113 {
2114 /* A local symbol. */
2115 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2116 abfd, r_symndx);
2117 if (isym == NULL)
2118 return FALSE;
2119
2120 hh = NULL;
2121 }
2122 else
2123 {
2124 isym = NULL;
2125
2126 hh = (struct elf_metag_link_hash_entry *)
2127 eh_syms[r_symndx - symtab_hdr->sh_info];
2128 while (hh->eh.root.type == bfd_link_hash_indirect
2129 || hh->eh.root.type == bfd_link_hash_warning)
2130 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2131 }
2132
2133 /* Some relocs require a global offset table. */
2134 if (htab->etab.sgot == NULL)
2135 {
2136 switch (r_type)
2137 {
2138 case R_METAG_TLS_GD:
2139 case R_METAG_TLS_LDM:
2140 case R_METAG_TLS_IE:
2141 if (bfd_link_pic (info))
2142 info->flags |= DF_STATIC_TLS;
2143 /* Fall through. */
2144
2145 case R_METAG_HI16_GOTOFF:
2146 case R_METAG_LO16_GOTOFF:
2147 case R_METAG_GETSET_GOTOFF:
2148 case R_METAG_GETSET_GOT:
2149 case R_METAG_HI16_GOTPC:
2150 case R_METAG_LO16_GOTPC:
2151 if (dynobj == NULL)
2152 htab->etab.dynobj = dynobj = abfd;
2153 if (!elf_metag_create_dynamic_sections (dynobj, info))
2154 return FALSE;
2155 break;
2156
2157 default:
2158 break;
2159 }
2160 }
2161
2162 switch (r_type)
2163 {
2164 case R_METAG_TLS_IE:
2165 case R_METAG_TLS_GD:
2166 case R_METAG_GETSET_GOT:
2167 switch (r_type)
2168 {
2169 default:
2170 tls_type = GOT_NORMAL;
2171 break;
2172 case R_METAG_TLS_IE:
2173 tls_type = GOT_TLS_IE;
2174 break;
2175 case R_METAG_TLS_GD:
2176 tls_type = GOT_TLS_GD;
2177 break;
2178 }
2179
2180 if (hh != NULL)
2181 {
2182 hh->eh.got.refcount += 1;
2183 old_tls_type = hh->tls_type;
2184 }
2185 else
2186 {
2187 bfd_signed_vma *local_got_refcounts;
2188
2189 /* This is a global offset table entry for a local
2190 symbol. */
2191 local_got_refcounts = elf_local_got_refcounts (abfd);
2192 if (local_got_refcounts == NULL)
2193 {
2194 bfd_size_type size;
2195
2196 size = symtab_hdr->sh_info;
2197 size *= sizeof (bfd_signed_vma);
2198 /* Add in space to store the local GOT TLS types. */
2199 size += symtab_hdr->sh_info;
2200 local_got_refcounts = ((bfd_signed_vma *)
2201 bfd_zalloc (abfd, size));
2202 if (local_got_refcounts == NULL)
2203 return FALSE;
2204 elf_local_got_refcounts (abfd) = local_got_refcounts;
2205 memset (metag_elf_local_got_tls_type (abfd),
2206 GOT_UNKNOWN, symtab_hdr->sh_info);
2207 }
2208 local_got_refcounts[r_symndx] += 1;
2209 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2210 }
2211
2212 if (old_tls_type != tls_type)
2213 {
2214 if (hh != NULL)
2215 {
2216 hh->tls_type = tls_type;
2217 }
2218 else
2219 {
2220 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2221 }
2222 }
2223
2224 break;
2225
2226 case R_METAG_TLS_LDM:
2227 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2228 break;
2229
2230 case R_METAG_RELBRANCH_PLT:
2231 /* This symbol requires a procedure linkage table entry. We
2232 actually build the entry in adjust_dynamic_symbol,
2233 because this might be a case of linking PIC code without
2234 linking in any dynamic objects, in which case we don't
2235 need to generate a procedure linkage table after all. */
2236
2237 /* If this is a local symbol, we resolve it directly without
2238 creating a procedure linkage table entry. */
2239 if (hh == NULL)
2240 continue;
2241
2242 if (hh->eh.forced_local)
2243 break;
2244
2245 hh->eh.needs_plt = 1;
2246 hh->eh.plt.refcount += 1;
2247 break;
2248
2249 case R_METAG_HIADDR16:
2250 case R_METAG_LOADDR16:
2251 /* Let's help debug shared library creation. These relocs
2252 cannot be used in shared libs. Don't error out for
2253 sections we don't care about, such as debug sections or
2254 non-constant sections. */
2255 if (bfd_link_pic (info)
2256 && (sec->flags & SEC_ALLOC) != 0
2257 && (sec->flags & SEC_READONLY) != 0)
2258 {
2259 const char *name;
2260
2261 if (hh)
2262 name = hh->eh.root.root.string;
2263 else
2264 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2265 _bfd_error_handler
2266 /* xgettext:c-format */
2267 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2268 abfd, elf_metag_howto_table[r_type].name, name);
2269 bfd_set_error (bfd_error_bad_value);
2270 return FALSE;
2271 }
2272
2273 /* Fall through. */
2274 case R_METAG_ADDR32:
2275 case R_METAG_RELBRANCH:
2276 case R_METAG_GETSETOFF:
2277 if (hh != NULL && !bfd_link_pic (info))
2278 {
2279 hh->eh.non_got_ref = 1;
2280 hh->eh.plt.refcount += 1;
2281 }
2282
2283 /* If we are creating a shared library, and this is a reloc
2284 against a global symbol, or a non PC relative reloc
2285 against a local symbol, then we need to copy the reloc
2286 into the shared library. However, if we are linking with
2287 -Bsymbolic, we do not need to copy a reloc against a
2288 global symbol which is defined in an object we are
2289 including in the link (i.e., DEF_REGULAR is set). At
2290 this point we have not seen all the input files, so it is
2291 possible that DEF_REGULAR is not set now but will be set
2292 later (it is never cleared). We account for that
2293 possibility below by storing information in the
2294 dyn_relocs field of the hash table entry. A similar
2295 situation occurs when creating shared libraries and symbol
2296 visibility changes render the symbol local.
2297
2298 If on the other hand, we are creating an executable, we
2299 may need to keep relocations for symbols satisfied by a
2300 dynamic library if we manage to avoid copy relocs for the
2301 symbol. */
2302 if ((bfd_link_pic (info)
2303 && (sec->flags & SEC_ALLOC) != 0
2304 && (r_type != R_METAG_RELBRANCH
2305 || (hh != NULL
2306 && (! info->symbolic
2307 || hh->eh.root.type == bfd_link_hash_defweak
2308 || !hh->eh.def_regular))))
2309 || (!bfd_link_pic (info)
2310 && (sec->flags & SEC_ALLOC) != 0
2311 && hh != NULL
2312 && (hh->eh.root.type == bfd_link_hash_defweak
2313 || !hh->eh.def_regular)))
2314 {
2315 struct elf_metag_dyn_reloc_entry *hdh_p;
2316 struct elf_metag_dyn_reloc_entry **hdh_head;
2317
2318 if (dynobj == NULL)
2319 htab->etab.dynobj = dynobj = abfd;
2320
2321 /* When creating a shared object, we must copy these
2322 relocs into the output file. We create a reloc
2323 section in dynobj and make room for the reloc. */
2324 if (sreloc == NULL)
2325 {
2326 sreloc = _bfd_elf_make_dynamic_reloc_section
2327 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2328
2329 if (sreloc == NULL)
2330 {
2331 bfd_set_error (bfd_error_bad_value);
2332 return FALSE;
2333 }
2334
2335 elf_section_data (sec)->sreloc = sreloc;
2336 }
2337
2338 /* If this is a global symbol, we count the number of
2339 relocations we need for this symbol. */
2340 if (hh != NULL)
2341 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2342 else
2343 {
2344 /* Track dynamic relocs needed for local syms too. */
2345 asection *sr;
2346 void *vpp;
2347
2348 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2349 if (sr == NULL)
2350 sr = sec;
2351
2352 vpp = &elf_section_data (sr)->local_dynrel;
2353 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2354 }
2355
2356 hdh_p = *hdh_head;
2357 if (hdh_p == NULL || hdh_p->sec != sec)
2358 {
2359 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2360 bfd_alloc (dynobj, sizeof *hdh_p));
2361 if (hdh_p == NULL)
2362 return FALSE;
2363 hdh_p->hdh_next = *hdh_head;
2364 *hdh_head = hdh_p;
2365 hdh_p->sec = sec;
2366 hdh_p->count = 0;
2367 hdh_p->relative_count = 0;
2368 }
2369
2370 hdh_p->count += 1;
2371 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2372 hdh_p->relative_count += 1;
2373 }
2374 break;
2375
2376 /* This relocation describes the C++ object vtable hierarchy.
2377 Reconstruct it for later use during GC. */
2378 case R_METAG_GNU_VTINHERIT:
2379 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2380 rel->r_offset))
2381 return FALSE;
2382 break;
2383
2384 /* This relocation describes which C++ vtable entries are actually
2385 used. Record for later use during GC. */
2386 case R_METAG_GNU_VTENTRY:
2387 BFD_ASSERT (hh != NULL);
2388 if (hh != NULL
2389 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2390 return FALSE;
2391 break;
2392 }
2393 }
2394
2395 return TRUE;
2396 }
2397
2398 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2399
2400 static void
2401 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2402 struct elf_link_hash_entry *eh_dir,
2403 struct elf_link_hash_entry *eh_ind)
2404 {
2405 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2406
2407 hh_dir = metag_elf_hash_entry (eh_dir);
2408 hh_ind = metag_elf_hash_entry (eh_ind);
2409
2410 if (hh_ind->dyn_relocs != NULL)
2411 {
2412 if (hh_dir->dyn_relocs != NULL)
2413 {
2414 struct elf_metag_dyn_reloc_entry **hdh_pp;
2415 struct elf_metag_dyn_reloc_entry *hdh_p;
2416
2417 if (eh_ind->root.type == bfd_link_hash_indirect)
2418 abort ();
2419
2420 /* Add reloc counts against the weak sym to the strong sym
2421 list. Merge any entries against the same section. */
2422 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2423 {
2424 struct elf_metag_dyn_reloc_entry *hdh_q;
2425
2426 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2427 hdh_q = hdh_q->hdh_next)
2428 if (hdh_q->sec == hdh_p->sec)
2429 {
2430 hdh_q->relative_count += hdh_p->relative_count;
2431 hdh_q->count += hdh_p->count;
2432 *hdh_pp = hdh_p->hdh_next;
2433 break;
2434 }
2435 if (hdh_q == NULL)
2436 hdh_pp = &hdh_p->hdh_next;
2437 }
2438 *hdh_pp = hh_dir->dyn_relocs;
2439 }
2440
2441 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2442 hh_ind->dyn_relocs = NULL;
2443 }
2444
2445 if (eh_ind->root.type == bfd_link_hash_indirect
2446 && eh_dir->got.refcount <= 0)
2447 {
2448 hh_dir->tls_type = hh_ind->tls_type;
2449 hh_ind->tls_type = GOT_UNKNOWN;
2450 }
2451
2452 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2453 }
2454
2455 /* Find dynamic relocs for H that apply to read-only sections. */
2456
2457 static asection *
2458 readonly_dynrelocs (struct elf_link_hash_entry *h)
2459 {
2460 struct elf_metag_dyn_reloc_entry *p;
2461
2462 for (p = metag_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->hdh_next)
2463 {
2464 asection *s = p->sec->output_section;
2465
2466 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2467 return p->sec;
2468 }
2469 return NULL;
2470 }
2471
2472 /* Adjust a symbol defined by a dynamic object and referenced by a
2473 regular object. The current definition is in some section of the
2474 dynamic object, but we're not including those sections. We have to
2475 change the definition to something the rest of the link can
2476 understand. */
2477
2478 static bfd_boolean
2479 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2480 struct elf_link_hash_entry *eh)
2481 {
2482 struct elf_metag_link_hash_table *htab;
2483 struct elf_metag_link_hash_entry *hh;
2484 struct elf_metag_dyn_reloc_entry *hdh_p;
2485 asection *s, *srel;
2486
2487 /* If this is a function, put it in the procedure linkage table. We
2488 will fill in the contents of the procedure linkage table later,
2489 when we know the address of the .got section. */
2490 if (eh->type == STT_FUNC
2491 || eh->needs_plt)
2492 {
2493 if (eh->plt.refcount <= 0
2494 || SYMBOL_CALLS_LOCAL (info, eh)
2495 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2496 && eh->root.type == bfd_link_hash_undefweak))
2497 {
2498 /* This case can occur if we saw a PLT reloc in an input
2499 file, but the symbol was never referred to by a dynamic
2500 object. In such a case, we don't actually need to build
2501 a procedure linkage table, and we can just do a PCREL
2502 reloc instead. */
2503 eh->plt.offset = (bfd_vma) -1;
2504 eh->needs_plt = 0;
2505 }
2506
2507 return TRUE;
2508 }
2509 else
2510 eh->plt.offset = (bfd_vma) -1;
2511
2512 /* If this is a weak symbol, and there is a real definition, the
2513 processor independent code will have arranged for us to see the
2514 real definition first, and we can just use the same value. */
2515 if (eh->is_weakalias)
2516 {
2517 struct elf_link_hash_entry *def = weakdef (eh);
2518 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2519 eh->root.u.def.section = def->root.u.def.section;
2520 eh->root.u.def.value = def->root.u.def.value;
2521 eh->non_got_ref = def->non_got_ref;
2522 return TRUE;
2523 }
2524
2525 /* This is a reference to a symbol defined by a dynamic object which
2526 is not a function. */
2527
2528 /* If we are creating a shared library, we must presume that the
2529 only references to the symbol are via the global offset table.
2530 For such cases we need not do anything here; the relocations will
2531 be handled correctly by relocate_section. */
2532 if (bfd_link_pic (info))
2533 return TRUE;
2534
2535 /* If there are no references to this symbol that do not use the
2536 GOT, we don't need to generate a copy reloc. */
2537 if (!eh->non_got_ref)
2538 return TRUE;
2539
2540 /* If -z nocopyreloc was given, we won't generate them either. */
2541 if (info->nocopyreloc)
2542 {
2543 eh->non_got_ref = 0;
2544 return TRUE;
2545 }
2546
2547 hh = (struct elf_metag_link_hash_entry *) eh;
2548 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2549 {
2550 s = hdh_p->sec->output_section;
2551 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2552 break;
2553 }
2554
2555 /* If we didn't find any dynamic relocs in read-only sections, then
2556 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2557 if (hdh_p == NULL)
2558 {
2559 eh->non_got_ref = 0;
2560 return TRUE;
2561 }
2562
2563 /* We must allocate the symbol in our .dynbss section, which will
2564 become part of the .bss section of the executable. There will be
2565 an entry for this symbol in the .dynsym section. The dynamic
2566 object will contain position independent code, so all references
2567 from the dynamic object to this symbol will go through the global
2568 offset table. The dynamic linker will use the .dynsym entry to
2569 determine the address it must put in the global offset table, so
2570 both the dynamic object and the regular object will refer to the
2571 same memory location for the variable. */
2572
2573 htab = metag_link_hash_table (info);
2574
2575 /* We must generate a COPY reloc to tell the dynamic linker to
2576 copy the initial value out of the dynamic object and into the
2577 runtime process image. */
2578 if ((eh->root.u.def.section->flags & SEC_READONLY) != 0)
2579 {
2580 s = htab->etab.sdynrelro;
2581 srel = htab->etab.sreldynrelro;
2582 }
2583 else
2584 {
2585 s = htab->etab.sdynbss;
2586 srel = htab->etab.srelbss;
2587 }
2588 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2589 {
2590 srel->size += sizeof (Elf32_External_Rela);
2591 eh->needs_copy = 1;
2592 }
2593
2594 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
2595 }
2596
2597 /* Allocate space in .plt, .got and associated reloc sections for
2598 global syms. */
2599
2600 static bfd_boolean
2601 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2602 {
2603 struct bfd_link_info *info;
2604 struct elf_metag_link_hash_table *htab;
2605 struct elf_metag_link_hash_entry *hh;
2606 struct elf_metag_dyn_reloc_entry *hdh_p;
2607
2608 if (eh->root.type == bfd_link_hash_indirect)
2609 return TRUE;
2610
2611 if (eh->root.type == bfd_link_hash_warning)
2612 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2613
2614 info = inf;
2615 htab = metag_link_hash_table (info);
2616
2617 if (htab->etab.dynamic_sections_created
2618 && eh->plt.refcount > 0)
2619 {
2620 /* Make sure this symbol is output as a dynamic symbol.
2621 Undefined weak syms won't yet be marked as dynamic. */
2622 if (eh->dynindx == -1
2623 && !eh->forced_local)
2624 {
2625 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2626 return FALSE;
2627 }
2628
2629 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
2630 {
2631 asection *s = htab->etab.splt;
2632
2633 /* If this is the first .plt entry, make room for the special
2634 first entry. */
2635 if (s->size == 0)
2636 s->size += PLT_ENTRY_SIZE;
2637
2638 eh->plt.offset = s->size;
2639
2640 /* If this symbol is not defined in a regular file, and we are
2641 not generating a shared library, then set the symbol to this
2642 location in the .plt. This is required to make function
2643 pointers compare as equal between the normal executable and
2644 the shared library. */
2645 if (! bfd_link_pic (info)
2646 && !eh->def_regular)
2647 {
2648 eh->root.u.def.section = s;
2649 eh->root.u.def.value = eh->plt.offset;
2650 }
2651
2652 /* Make room for this entry. */
2653 s->size += PLT_ENTRY_SIZE;
2654
2655 /* We also need to make an entry in the .got.plt section, which
2656 will be placed in the .got section by the linker script. */
2657 htab->etab.sgotplt->size += 4;
2658
2659 /* We also need to make an entry in the .rel.plt section. */
2660 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
2661 }
2662 else
2663 {
2664 eh->plt.offset = (bfd_vma) -1;
2665 eh->needs_plt = 0;
2666 }
2667 }
2668 else
2669 {
2670 eh->plt.offset = (bfd_vma) -1;
2671 eh->needs_plt = 0;
2672 }
2673
2674 if (eh->got.refcount > 0)
2675 {
2676 asection *s;
2677 bfd_boolean dyn;
2678 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2679
2680 /* Make sure this symbol is output as a dynamic symbol.
2681 Undefined weak syms won't yet be marked as dynamic. */
2682 if (eh->dynindx == -1
2683 && !eh->forced_local)
2684 {
2685 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2686 return FALSE;
2687 }
2688
2689 s = htab->etab.sgot;
2690
2691 eh->got.offset = s->size;
2692 s->size += 4;
2693 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2694 if (tls_type == GOT_TLS_GD)
2695 s->size += 4;
2696 dyn = htab->etab.dynamic_sections_created;
2697 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2698 R_METAG_TLS_GD needs one if local symbol and two if global. */
2699 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2700 || (tls_type == GOT_TLS_IE && dyn))
2701 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2702 else if (tls_type == GOT_TLS_GD)
2703 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
2704 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2705 bfd_link_pic (info),
2706 eh))
2707 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2708 }
2709 else
2710 eh->got.offset = (bfd_vma) -1;
2711
2712 hh = (struct elf_metag_link_hash_entry *) eh;
2713 if (hh->dyn_relocs == NULL)
2714 return TRUE;
2715
2716 /* If this is a -Bsymbolic shared link, then we need to discard all
2717 space allocated for dynamic pc-relative relocs against symbols
2718 defined in a regular object. For the normal shared case, discard
2719 space for relocs that have become local due to symbol visibility
2720 changes. */
2721 if (bfd_link_pic (info))
2722 {
2723 if (SYMBOL_CALLS_LOCAL (info, eh))
2724 {
2725 struct elf_metag_dyn_reloc_entry **hdh_pp;
2726
2727 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2728 {
2729 hdh_p->count -= hdh_p->relative_count;
2730 hdh_p->relative_count = 0;
2731 if (hdh_p->count == 0)
2732 *hdh_pp = hdh_p->hdh_next;
2733 else
2734 hdh_pp = &hdh_p->hdh_next;
2735 }
2736 }
2737
2738 /* Also discard relocs on undefined weak syms with non-default
2739 visibility. */
2740 if (hh->dyn_relocs != NULL
2741 && eh->root.type == bfd_link_hash_undefweak)
2742 {
2743 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2744 hh->dyn_relocs = NULL;
2745
2746 /* Make sure undefined weak symbols are output as a dynamic
2747 symbol in PIEs. */
2748 else if (eh->dynindx == -1
2749 && !eh->forced_local)
2750 {
2751 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2752 return FALSE;
2753 }
2754 }
2755 }
2756 else
2757 {
2758 /* For the non-shared case, discard space for relocs against
2759 symbols which turn out to need copy relocs or are not
2760 dynamic. */
2761 if (!eh->non_got_ref
2762 && ((eh->def_dynamic
2763 && !eh->def_regular)
2764 || (htab->etab.dynamic_sections_created
2765 && (eh->root.type == bfd_link_hash_undefweak
2766 || eh->root.type == bfd_link_hash_undefined))))
2767 {
2768 /* Make sure this symbol is output as a dynamic symbol.
2769 Undefined weak syms won't yet be marked as dynamic. */
2770 if (eh->dynindx == -1
2771 && !eh->forced_local)
2772 {
2773 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2774 return FALSE;
2775 }
2776
2777 /* If that succeeded, we know we'll be keeping all the
2778 relocs. */
2779 if (eh->dynindx != -1)
2780 goto keep;
2781 }
2782
2783 hh->dyn_relocs = NULL;
2784 return TRUE;
2785
2786 keep: ;
2787 }
2788
2789 /* Finally, allocate space. */
2790 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2791 {
2792 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2793 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2794 }
2795
2796 return TRUE;
2797 }
2798
2799 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
2800 read-only sections. */
2801
2802 static bfd_boolean
2803 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
2804 {
2805 asection *sec;
2806
2807 if (h->root.type == bfd_link_hash_indirect)
2808 return TRUE;
2809
2810 sec = readonly_dynrelocs (h);
2811 if (sec != NULL)
2812 {
2813 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
2814
2815 info->flags |= DF_TEXTREL;
2816 info->callbacks->minfo
2817 (_("%B: dynamic relocation against `%T' in read-only section `%A'\n"),
2818 sec->owner, h->root.root.string, sec);
2819
2820 /* Not an error, just cut short the traversal. */
2821 return FALSE;
2822 }
2823 return TRUE;
2824 }
2825
2826 /* Set the sizes of the dynamic sections. */
2827
2828 static bfd_boolean
2829 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2830 struct bfd_link_info *info)
2831 {
2832 struct elf_metag_link_hash_table *htab;
2833 bfd *dynobj;
2834 bfd *ibfd;
2835 asection *s;
2836 bfd_boolean relocs;
2837
2838 htab = metag_link_hash_table (info);
2839 dynobj = htab->etab.dynobj;
2840 if (dynobj == NULL)
2841 abort ();
2842
2843 if (htab->etab.dynamic_sections_created)
2844 {
2845 /* Set the contents of the .interp section to the interpreter. */
2846 if (bfd_link_executable (info) && !info->nointerp)
2847 {
2848 s = bfd_get_linker_section (dynobj, ".interp");
2849 if (s == NULL)
2850 abort ();
2851 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2852 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2853 }
2854 }
2855
2856 /* Set up .got offsets for local syms, and space for local dynamic
2857 relocs. */
2858 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2859 {
2860 bfd_signed_vma *local_got;
2861 bfd_signed_vma *end_local_got;
2862 bfd_size_type locsymcount;
2863 Elf_Internal_Shdr *symtab_hdr;
2864 asection *srel;
2865 char *local_tls_type;
2866
2867 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2868 continue;
2869
2870 for (s = ibfd->sections; s != NULL; s = s->next)
2871 {
2872 struct elf_metag_dyn_reloc_entry *hdh_p;
2873
2874 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2875 elf_section_data (s)->local_dynrel);
2876 hdh_p != NULL;
2877 hdh_p = hdh_p->hdh_next)
2878 {
2879 if (!bfd_is_abs_section (hdh_p->sec)
2880 && bfd_is_abs_section (hdh_p->sec->output_section))
2881 {
2882 /* Input section has been discarded, either because
2883 it is a copy of a linkonce section or due to
2884 linker script /DISCARD/, so we'll be discarding
2885 the relocs too. */
2886 }
2887 else if (hdh_p->count != 0)
2888 {
2889 srel = elf_section_data (hdh_p->sec)->sreloc;
2890 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2891 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2892 info->flags |= DF_TEXTREL;
2893 }
2894 }
2895 }
2896
2897 local_got = elf_local_got_refcounts (ibfd);
2898 if (!local_got)
2899 continue;
2900
2901 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2902 locsymcount = symtab_hdr->sh_info;
2903 end_local_got = local_got + locsymcount;
2904 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2905 s = htab->etab.sgot;
2906 srel = htab->etab.srelgot;
2907 for (; local_got < end_local_got; ++local_got)
2908 {
2909 if (*local_got > 0)
2910 {
2911 *local_got = s->size;
2912 s->size += GOT_ENTRY_SIZE;
2913 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2914 if (*local_tls_type == GOT_TLS_GD)
2915 s->size += 4;
2916 if (bfd_link_pic (info))
2917 srel->size += sizeof (Elf32_External_Rela);
2918 }
2919 else
2920 *local_got = (bfd_vma) -1;
2921 ++local_tls_type;
2922 }
2923 }
2924
2925 if (htab->tls_ldm_got.refcount > 0)
2926 {
2927 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2928 reloc. */
2929 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2930 htab->etab.sgot->size += 8;
2931 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2932 }
2933 else
2934 htab->tls_ldm_got.offset = -1;
2935
2936 /* Allocate global sym .plt and .got entries, and space for global
2937 sym dynamic relocs. */
2938 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2939
2940 /* We now have determined the sizes of the various dynamic sections.
2941 Allocate memory for them. */
2942 relocs = FALSE;
2943 for (s = dynobj->sections; s != NULL; s = s->next)
2944 {
2945 bfd_boolean reloc_section = FALSE;
2946
2947 if ((s->flags & SEC_LINKER_CREATED) == 0)
2948 continue;
2949
2950 if (s == htab->etab.splt
2951 || s == htab->etab.sgot
2952 || s == htab->etab.sgotplt
2953 || s == htab->etab.sdynbss
2954 || s == htab->etab.sdynrelro)
2955 {
2956 /* Strip this section if we don't need it; see the
2957 comment below. */
2958 }
2959 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2960 {
2961 if (s->size != 0 && s != htab->etab.srelplt)
2962 relocs = TRUE;
2963
2964 /* We use the reloc_count field as a counter if we need
2965 to copy relocs into the output file. */
2966 s->reloc_count = 0;
2967 reloc_section = TRUE;
2968 }
2969 else
2970 {
2971 /* It's not one of our sections, so don't allocate space. */
2972 continue;
2973 }
2974
2975 if (s->size == 0)
2976 {
2977 /* If we don't need this section, strip it from the
2978 output file. This is mostly to handle .rela.bss and
2979 .rela.plt. We must create both sections in
2980 create_dynamic_sections, because they must be created
2981 before the linker maps input sections to output
2982 sections. The linker does that before
2983 adjust_dynamic_symbol is called, and it is that
2984 function which decides whether anything needs to go
2985 into these sections. */
2986 s->flags |= SEC_EXCLUDE;
2987 continue;
2988 }
2989
2990 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2991 continue;
2992
2993 /* Allocate memory for the section contents. */
2994 s->contents = bfd_zalloc (dynobj, s->size);
2995 if (s->contents == NULL)
2996 return FALSE;
2997 else if (reloc_section)
2998 {
2999 unsigned char *contents = s->contents;
3000 Elf32_External_Rela reloc;
3001
3002 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3003 memset(&reloc, 0, sizeof(Elf32_External_Rela));
3004 reloc.r_info[0] = R_METAG_NONE;
3005 for (; contents < (s->contents + s->size);
3006 contents += sizeof(Elf32_External_Rela))
3007 {
3008 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3009 }
3010 }
3011 }
3012
3013 if (htab->etab.dynamic_sections_created)
3014 {
3015 /* Add some entries to the .dynamic section. We fill in the
3016 values later, in elf_metag_finish_dynamic_sections, but we
3017 must add the entries now so that we get the correct size for
3018 the .dynamic section. The DT_DEBUG entry is filled in by the
3019 dynamic linker and used by the debugger. */
3020 #define add_dynamic_entry(TAG, VAL) \
3021 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3022
3023 if (!add_dynamic_entry (DT_PLTGOT, 0))
3024 return FALSE;
3025
3026 if (bfd_link_executable (info))
3027 {
3028 if (!add_dynamic_entry (DT_DEBUG, 0))
3029 return FALSE;
3030 }
3031
3032 if (htab->etab.srelplt->size != 0)
3033 {
3034 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3035 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3036 || !add_dynamic_entry (DT_JMPREL, 0))
3037 return FALSE;
3038 }
3039
3040 if (relocs)
3041 {
3042 if (!add_dynamic_entry (DT_RELA, 0)
3043 || !add_dynamic_entry (DT_RELASZ, 0)
3044 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3045 return FALSE;
3046
3047 /* If any dynamic relocs apply to a read-only section,
3048 then we need a DT_TEXTREL entry. */
3049 if ((info->flags & DF_TEXTREL) == 0)
3050 elf_link_hash_traverse (&htab->etab, maybe_set_textrel, info);
3051
3052 if ((info->flags & DF_TEXTREL) != 0)
3053 {
3054 if (!add_dynamic_entry (DT_TEXTREL, 0))
3055 return FALSE;
3056 }
3057 }
3058 }
3059 #undef add_dynamic_entry
3060
3061 return TRUE;
3062 }
3063
3064 /* Finish up dynamic symbol handling. We set the contents of various
3065 dynamic sections here. */
3066
3067 static bfd_boolean
3068 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3069 struct bfd_link_info *info,
3070 struct elf_link_hash_entry *eh,
3071 Elf_Internal_Sym *sym)
3072 {
3073 struct elf_metag_link_hash_table *htab;
3074 Elf_Internal_Rela rel;
3075 bfd_byte *loc;
3076
3077 htab = metag_link_hash_table (info);
3078
3079 if (eh->plt.offset != (bfd_vma) -1)
3080 {
3081 asection *splt;
3082 asection *sgot;
3083 asection *srela;
3084
3085 bfd_vma plt_index;
3086 bfd_vma got_offset;
3087 bfd_vma got_entry;
3088
3089 if (eh->plt.offset & 1)
3090 abort ();
3091
3092 BFD_ASSERT (eh->dynindx != -1);
3093
3094 splt = htab->etab.splt;
3095 sgot = htab->etab.sgotplt;
3096 srela = htab->etab.srelplt;
3097 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3098
3099 /* Get the index in the procedure linkage table which
3100 corresponds to this symbol. This is the index of this symbol
3101 in all the symbols for which we are making plt entries. The
3102 first entry in the procedure linkage table is reserved. */
3103 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3104
3105 /* Get the offset into the .got.plt table of the entry that
3106 corresponds to this function. */
3107 got_offset = plt_index * GOT_ENTRY_SIZE;
3108
3109 BFD_ASSERT (got_offset < (1 << 16));
3110
3111 got_entry = sgot->output_section->vma
3112 + sgot->output_offset
3113 + got_offset;
3114
3115 BFD_ASSERT (plt_index < (1 << 16));
3116
3117 /* Fill in the entry in the procedure linkage table. */
3118 if (! bfd_link_pic (info))
3119 {
3120 bfd_put_32 (output_bfd,
3121 (plt_entry[0]
3122 | (((got_entry >> 16) & 0xffff) << 3)),
3123 splt->contents + eh->plt.offset);
3124 bfd_put_32 (output_bfd,
3125 (plt_entry[1]
3126 | ((got_entry & 0xffff) << 3)),
3127 splt->contents + eh->plt.offset + 4);
3128 bfd_put_32 (output_bfd, plt_entry[2],
3129 splt->contents + eh->plt.offset + 8);
3130 bfd_put_32 (output_bfd,
3131 (plt_entry[3] | (plt_index << 3)),
3132 splt->contents + eh->plt.offset + 12);
3133 bfd_put_32 (output_bfd,
3134 (plt_entry[4]
3135 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3136 splt->contents + eh->plt.offset + 16);
3137 }
3138 else
3139 {
3140 bfd_vma addr = got_entry - (splt->output_section->vma +
3141 splt->output_offset + eh->plt.offset);
3142
3143 bfd_put_32 (output_bfd,
3144 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3145 splt->contents + eh->plt.offset);
3146 bfd_put_32 (output_bfd,
3147 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3148 splt->contents + eh->plt.offset + 4);
3149 bfd_put_32 (output_bfd, plt_pic_entry[2],
3150 splt->contents + eh->plt.offset + 8);
3151 bfd_put_32 (output_bfd,
3152 (plt_pic_entry[3] | (plt_index << 3)),
3153 splt->contents + eh->plt.offset + 12);
3154 bfd_put_32 (output_bfd,
3155 (plt_pic_entry[4]
3156 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3157 splt->contents + eh->plt.offset + 16);
3158 }
3159
3160 /* Fill in the entry in the global offset table. */
3161 bfd_put_32 (output_bfd,
3162 (splt->output_section->vma
3163 + splt->output_offset
3164 + eh->plt.offset
3165 + 12), /* offset within PLT entry */
3166 sgot->contents + got_offset);
3167
3168 /* Fill in the entry in the .rela.plt section. */
3169 rel.r_offset = (sgot->output_section->vma
3170 + sgot->output_offset
3171 + got_offset);
3172 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3173 rel.r_addend = 0;
3174 loc = htab->etab.srelplt->contents;
3175 loc += plt_index * sizeof(Elf32_External_Rela);
3176 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3177
3178 if (!eh->def_regular)
3179 {
3180 /* Mark the symbol as undefined, rather than as defined in
3181 the .plt section. Leave the value alone. */
3182 sym->st_shndx = SHN_UNDEF;
3183 }
3184 }
3185
3186 if (eh->got.offset != (bfd_vma) -1
3187 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3188 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3189 {
3190 /* This symbol has an entry in the global offset table. Set it
3191 up. */
3192
3193 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3194 + htab->etab.sgot->output_offset
3195 + htab->etab.sgot->output_section->vma);
3196
3197 /* If this is a -Bsymbolic link and the symbol is defined
3198 locally or was forced to be local because of a version file,
3199 we just want to emit a RELATIVE reloc. The entry in the
3200 global offset table will already have been initialized in the
3201 relocate_section function. */
3202 if (bfd_link_pic (info)
3203 && (info->symbolic || eh->dynindx == -1)
3204 && eh->def_regular)
3205 {
3206 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3207 rel.r_addend = (eh->root.u.def.value
3208 + eh->root.u.def.section->output_offset
3209 + eh->root.u.def.section->output_section->vma);
3210 }
3211 else
3212 {
3213 if ((eh->got.offset & 1) != 0)
3214 abort ();
3215 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset);
3216 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3217 rel.r_addend = 0;
3218 }
3219
3220 loc = htab->etab.srelgot->contents;
3221 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3222 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3223 }
3224
3225 if (eh->needs_copy)
3226 {
3227 asection *s;
3228
3229 /* This symbol needs a copy reloc. Set it up. */
3230
3231 if (! (eh->dynindx != -1
3232 && (eh->root.type == bfd_link_hash_defined
3233 || eh->root.type == bfd_link_hash_defweak)))
3234 abort ();
3235
3236 rel.r_offset = (eh->root.u.def.value
3237 + eh->root.u.def.section->output_offset
3238 + eh->root.u.def.section->output_section->vma);
3239 rel.r_addend = 0;
3240 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3241 if (eh->root.u.def.section == htab->etab.sdynrelro)
3242 s = htab->etab.sreldynrelro;
3243 else
3244 s = htab->etab.srelbss;
3245 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3246 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3247 }
3248
3249 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3250 if (eh->root.root.string[0] == '_'
3251 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3252 || eh == htab->etab.hgot))
3253 {
3254 sym->st_shndx = SHN_ABS;
3255 }
3256
3257 return TRUE;
3258 }
3259
3260 /* Set the Meta ELF ABI version. */
3261
3262 static void
3263 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
3264 {
3265 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3266
3267 _bfd_elf_post_process_headers (abfd, link_info);
3268 i_ehdrp = elf_elfheader (abfd);
3269 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3270 }
3271
3272 /* Used to decide how to sort relocs in an optimal manner for the
3273 dynamic linker, before writing them out. */
3274
3275 static enum elf_reloc_type_class
3276 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3277 const asection *rel_sec ATTRIBUTE_UNUSED,
3278 const Elf_Internal_Rela *rela)
3279 {
3280 switch ((int) ELF32_R_TYPE (rela->r_info))
3281 {
3282 case R_METAG_RELATIVE:
3283 return reloc_class_relative;
3284 case R_METAG_JMP_SLOT:
3285 return reloc_class_plt;
3286 case R_METAG_COPY:
3287 return reloc_class_copy;
3288 default:
3289 return reloc_class_normal;
3290 }
3291 }
3292
3293 /* Finish up the dynamic sections. */
3294
3295 static bfd_boolean
3296 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3297 struct bfd_link_info *info)
3298 {
3299 bfd *dynobj;
3300 struct elf_metag_link_hash_table *htab;
3301 asection *sdyn;
3302
3303 htab = metag_link_hash_table (info);
3304 dynobj = htab->etab.dynobj;
3305
3306 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3307
3308 if (htab->etab.dynamic_sections_created)
3309 {
3310 asection *splt;
3311 Elf32_External_Dyn *dyncon, *dynconend;
3312
3313 if (sdyn == NULL)
3314 abort ();
3315
3316 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3317 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3318 for (; dyncon < dynconend; dyncon++)
3319 {
3320 Elf_Internal_Dyn dyn;
3321 asection *s;
3322
3323 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3324
3325 switch (dyn.d_tag)
3326 {
3327 default:
3328 continue;
3329
3330 case DT_PLTGOT:
3331 s = htab->etab.sgot;
3332 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3333 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3334 break;
3335
3336 case DT_JMPREL:
3337 s = htab->etab.srelplt;
3338 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3339 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3340 break;
3341
3342 case DT_PLTRELSZ:
3343 s = htab->etab.srelplt;
3344 dyn.d_un.d_val = s->size;
3345 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3346 break;
3347 }
3348
3349 }
3350
3351 /* Fill in the first entry in the procedure linkage table. */
3352 splt = htab->etab.splt;
3353 if (splt && splt->size > 0)
3354 {
3355 unsigned long addr;
3356 /* addr = .got + 4 */
3357 addr = (htab->etab.sgot->output_section->vma
3358 + htab->etab.sgot->output_offset + 4);
3359 if (bfd_link_pic (info))
3360 {
3361 addr -= splt->output_section->vma + splt->output_offset;
3362 bfd_put_32 (output_bfd,
3363 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3364 splt->contents);
3365 bfd_put_32 (output_bfd,
3366 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3367 splt->contents + 4);
3368 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3369 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3370 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3371 }
3372 else
3373 {
3374 bfd_put_32 (output_bfd,
3375 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3376 splt->contents);
3377 bfd_put_32 (output_bfd,
3378 plt0_entry[1] | ((addr & 0xffff) << 3),
3379 splt->contents + 4);
3380 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3381 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3382 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3383 }
3384
3385 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3386 PLT_ENTRY_SIZE;
3387 }
3388 }
3389
3390 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
3391 {
3392 /* Fill in the first entry in the global offset table.
3393 We use it to point to our dynamic section, if we have one. */
3394 bfd_put_32 (output_bfd,
3395 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3396 htab->etab.sgot->contents);
3397
3398 /* The second entry is reserved for use by the dynamic linker. */
3399 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3400
3401 /* Set .got entry size. */
3402 elf_section_data (htab->etab.sgot->output_section)
3403 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3404 }
3405
3406 return TRUE;
3407 }
3408
3409 /* Return the section that should be marked against GC for a given
3410 relocation. */
3411
3412 static asection *
3413 elf_metag_gc_mark_hook (asection *sec,
3414 struct bfd_link_info *info,
3415 Elf_Internal_Rela *rela,
3416 struct elf_link_hash_entry *hh,
3417 Elf_Internal_Sym *sym)
3418 {
3419 if (hh != NULL)
3420 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3421 {
3422 case R_METAG_GNU_VTINHERIT:
3423 case R_METAG_GNU_VTENTRY:
3424 return NULL;
3425 }
3426
3427 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3428 }
3429
3430 /* Determine the type of stub needed, if any, for a call. */
3431
3432 static enum elf_metag_stub_type
3433 metag_type_of_stub (asection *input_sec,
3434 const Elf_Internal_Rela *rel,
3435 struct elf_metag_link_hash_entry *hh,
3436 bfd_vma destination,
3437 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3438 {
3439 bfd_vma location;
3440 bfd_vma branch_offset;
3441 bfd_vma max_branch_offset;
3442
3443 if (hh != NULL &&
3444 !(hh->eh.root.type == bfd_link_hash_defined
3445 || hh->eh.root.type == bfd_link_hash_defweak))
3446 return metag_stub_none;
3447
3448 /* Determine where the call point is. */
3449 location = (input_sec->output_offset
3450 + input_sec->output_section->vma
3451 + rel->r_offset);
3452
3453 branch_offset = destination - location;
3454
3455 /* Determine if a long branch stub is needed. Meta branch offsets
3456 are signed 19 bits 4 byte aligned. */
3457 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3458
3459 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3460 {
3461 if (bfd_link_pic (info))
3462 return metag_stub_long_branch_shared;
3463 else
3464 return metag_stub_long_branch;
3465 }
3466
3467 return metag_stub_none;
3468 }
3469
3470 #define MOVT_A0_3 0x82180005
3471 #define JUMP_A0_3 0xac180003
3472
3473 #define MOVT_A1LBP 0x83080005
3474 #define ADD_A1LBP 0x83080000
3475
3476 #define ADDT_A0_3_CPC 0x82980001
3477 #define ADD_A0_3_A0_3 0x82180000
3478 #define MOV_PC_A0_3 0xa3180ca0
3479
3480 static bfd_boolean
3481 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3482 {
3483 struct elf_metag_stub_hash_entry *hsh;
3484 asection *stub_sec;
3485 bfd *stub_bfd;
3486 bfd_byte *loc;
3487 bfd_vma sym_value;
3488 int size;
3489
3490 /* Massage our args to the form they really have. */
3491 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3492
3493 stub_sec = hsh->stub_sec;
3494
3495 /* Make a note of the offset within the stubs for this entry. */
3496 hsh->stub_offset = stub_sec->size;
3497 loc = stub_sec->contents + hsh->stub_offset;
3498
3499 stub_bfd = stub_sec->owner;
3500
3501 switch (hsh->stub_type)
3502 {
3503 case metag_stub_long_branch_shared:
3504 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3505 calculate the jump target using A0.3 as a temporary. Then a MOV
3506 to PC carries out the jump. */
3507 sym_value = (hsh->target_value
3508 + hsh->target_section->output_offset
3509 + hsh->target_section->output_section->vma
3510 + hsh->addend);
3511
3512 sym_value -= (hsh->stub_offset
3513 + stub_sec->output_offset
3514 + stub_sec->output_section->vma);
3515
3516 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3517 loc);
3518
3519 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3520 loc + 4);
3521
3522 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3523
3524 size = 12;
3525 break;
3526 case metag_stub_long_branch:
3527 /* A standard long branch stub is a MOVT instruction followed by a
3528 JUMP instruction using the A0.3 register as a temporary. This is
3529 the same method used by the LDLK linker (patch.c). */
3530 sym_value = (hsh->target_value
3531 + hsh->target_section->output_offset
3532 + hsh->target_section->output_section->vma
3533 + hsh->addend);
3534
3535 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3536 loc);
3537
3538 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3539
3540 size = 8;
3541 break;
3542 default:
3543 BFD_FAIL ();
3544 return FALSE;
3545 }
3546
3547 stub_sec->size += size;
3548 return TRUE;
3549 }
3550
3551 /* As above, but don't actually build the stub. Just bump offset so
3552 we know stub section sizes. */
3553
3554 static bfd_boolean
3555 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3556 {
3557 struct elf_metag_stub_hash_entry *hsh;
3558 int size = 0;
3559
3560 /* Massage our args to the form they really have. */
3561 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3562
3563 if (hsh->stub_type == metag_stub_long_branch)
3564 size = 8;
3565 else if (hsh->stub_type == metag_stub_long_branch_shared)
3566 size = 12;
3567
3568 hsh->stub_sec->size += size;
3569 return TRUE;
3570 }
3571
3572 /* Set up various things so that we can make a list of input sections
3573 for each output section included in the link. Returns -1 on error,
3574 0 when no stubs will be needed, and 1 on success. */
3575
3576 int
3577 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3578 {
3579 bfd *input_bfd;
3580 unsigned int bfd_count;
3581 unsigned int top_id, top_index;
3582 asection *section;
3583 asection **input_list, **list;
3584 bfd_size_type amt;
3585 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3586
3587 /* Count the number of input BFDs and find the top input section id. */
3588 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3589 input_bfd != NULL;
3590 input_bfd = input_bfd->link.next)
3591 {
3592 bfd_count += 1;
3593 for (section = input_bfd->sections;
3594 section != NULL;
3595 section = section->next)
3596 {
3597 if (top_id < section->id)
3598 top_id = section->id;
3599 }
3600 }
3601
3602 htab->bfd_count = bfd_count;
3603
3604 amt = sizeof (struct map_stub) * (top_id + 1);
3605 htab->stub_group = bfd_zmalloc (amt);
3606 if (htab->stub_group == NULL)
3607 return -1;
3608
3609 /* We can't use output_bfd->section_count here to find the top output
3610 section index as some sections may have been removed, and
3611 strip_excluded_output_sections doesn't renumber the indices. */
3612 for (section = output_bfd->sections, top_index = 0;
3613 section != NULL;
3614 section = section->next)
3615 {
3616 if (top_index < section->index)
3617 top_index = section->index;
3618 }
3619
3620 htab->top_index = top_index;
3621 amt = sizeof (asection *) * (top_index + 1);
3622 input_list = bfd_malloc (amt);
3623 htab->input_list = input_list;
3624 if (input_list == NULL)
3625 return -1;
3626
3627 /* For sections we aren't interested in, mark their entries with a
3628 value we can check later. */
3629 list = input_list + top_index;
3630 do
3631 *list = bfd_abs_section_ptr;
3632 while (list-- != input_list);
3633
3634 for (section = output_bfd->sections;
3635 section != NULL;
3636 section = section->next)
3637 {
3638 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3639 * have PC relative relocs in them but no code flag set. */
3640 if (((section->flags & SEC_CODE) != 0) ||
3641 strcmp(".ctors", section->name) ||
3642 strcmp(".dtors", section->name))
3643 input_list[section->index] = NULL;
3644 }
3645
3646 return 1;
3647 }
3648
3649 /* The linker repeatedly calls this function for each input section,
3650 in the order that input sections are linked into output sections.
3651 Build lists of input sections to determine groupings between which
3652 we may insert linker stubs. */
3653
3654 void
3655 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3656 {
3657 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3658
3659 if (isec->output_section->index <= htab->top_index)
3660 {
3661 asection **list = htab->input_list + isec->output_section->index;
3662 if (*list != bfd_abs_section_ptr)
3663 {
3664 /* Steal the link_sec pointer for our list. */
3665 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3666 /* This happens to make the list in reverse order,
3667 which is what we want. */
3668 PREV_SEC (isec) = *list;
3669 *list = isec;
3670 }
3671 }
3672 }
3673
3674 /* See whether we can group stub sections together. Grouping stub
3675 sections may result in fewer stubs. More importantly, we need to
3676 put all .init* and .fini* stubs at the beginning of the .init or
3677 .fini output sections respectively, because glibc splits the
3678 _init and _fini functions into multiple parts. Putting a stub in
3679 the middle of a function is not a good idea. */
3680
3681 static void
3682 group_sections (struct elf_metag_link_hash_table *htab,
3683 bfd_size_type stub_group_size,
3684 bfd_boolean stubs_always_before_branch)
3685 {
3686 asection **list = htab->input_list + htab->top_index;
3687 do
3688 {
3689 asection *tail = *list;
3690 if (tail == bfd_abs_section_ptr)
3691 continue;
3692 while (tail != NULL)
3693 {
3694 asection *curr;
3695 asection *prev;
3696 bfd_size_type total;
3697 bfd_boolean big_sec;
3698
3699 curr = tail;
3700 total = tail->size;
3701 big_sec = total >= stub_group_size;
3702
3703 while ((prev = PREV_SEC (curr)) != NULL
3704 && ((total += curr->output_offset - prev->output_offset)
3705 < stub_group_size))
3706 curr = prev;
3707
3708 /* OK, the size from the start of CURR to the end is less
3709 than stub_group_size bytes and thus can be handled by one stub
3710 section. (or the tail section is itself larger than
3711 stub_group_size bytes, in which case we may be toast.)
3712 We should really be keeping track of the total size of
3713 stubs added here, as stubs contribute to the final output
3714 section size. */
3715 do
3716 {
3717 prev = PREV_SEC (tail);
3718 /* Set up this stub group. */
3719 htab->stub_group[tail->id].link_sec = curr;
3720 }
3721 while (tail != curr && (tail = prev) != NULL);
3722
3723 /* But wait, there's more! Input sections up to stub_group_size
3724 bytes before the stub section can be handled by it too.
3725 Don't do this if we have a really large section after the
3726 stubs, as adding more stubs increases the chance that
3727 branches may not reach into the stub section. */
3728 if (!stubs_always_before_branch && !big_sec)
3729 {
3730 total = 0;
3731 while (prev != NULL
3732 && ((total += tail->output_offset - prev->output_offset)
3733 < stub_group_size))
3734 {
3735 tail = prev;
3736 prev = PREV_SEC (tail);
3737 htab->stub_group[tail->id].link_sec = curr;
3738 }
3739 }
3740 tail = prev;
3741 }
3742 }
3743 while (list-- != htab->input_list);
3744 free (htab->input_list);
3745 #undef PREV_SEC
3746 }
3747
3748 /* Read in all local syms for all input bfds.
3749 Returns -1 on error, 0 otherwise. */
3750
3751 static int
3752 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3753 struct bfd_link_info *info)
3754 {
3755 unsigned int bfd_indx;
3756 Elf_Internal_Sym *local_syms, **all_local_syms;
3757 int stub_changed = 0;
3758 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3759
3760 /* We want to read in symbol extension records only once. To do this
3761 we need to read in the local symbols in parallel and save them for
3762 later use; so hold pointers to the local symbols in an array. */
3763 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3764 all_local_syms = bfd_zmalloc (amt);
3765 htab->all_local_syms = all_local_syms;
3766 if (all_local_syms == NULL)
3767 return -1;
3768
3769 /* Walk over all the input BFDs, swapping in local symbols. */
3770 for (bfd_indx = 0;
3771 input_bfd != NULL;
3772 input_bfd = input_bfd->link.next, bfd_indx++)
3773 {
3774 Elf_Internal_Shdr *symtab_hdr;
3775
3776 /* We'll need the symbol table in a second. */
3777 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3778 if (symtab_hdr->sh_info == 0)
3779 continue;
3780
3781 /* We need an array of the local symbols attached to the input bfd. */
3782 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3783 if (local_syms == NULL)
3784 {
3785 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3786 symtab_hdr->sh_info, 0,
3787 NULL, NULL, NULL);
3788 /* Cache them for elf_link_input_bfd. */
3789 symtab_hdr->contents = (unsigned char *) local_syms;
3790 }
3791 if (local_syms == NULL)
3792 return -1;
3793
3794 all_local_syms[bfd_indx] = local_syms;
3795 }
3796
3797 return stub_changed;
3798 }
3799
3800 /* Determine and set the size of the stub section for a final link.
3801
3802 The basic idea here is to examine all the relocations looking for
3803 PC-relative calls to a target that is unreachable with a "CALLR"
3804 instruction. */
3805
3806 /* See elf32-hppa.c and elf64-ppc.c. */
3807
3808 bfd_boolean
3809 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3810 struct bfd_link_info *info,
3811 bfd_signed_vma group_size,
3812 asection * (*add_stub_section) (const char *, asection *),
3813 void (*layout_sections_again) (void))
3814 {
3815 bfd_size_type stub_group_size;
3816 bfd_boolean stubs_always_before_branch;
3817 bfd_boolean stub_changed;
3818 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3819
3820 /* Stash our params away. */
3821 htab->stub_bfd = stub_bfd;
3822 htab->add_stub_section = add_stub_section;
3823 htab->layout_sections_again = layout_sections_again;
3824 stubs_always_before_branch = group_size < 0;
3825 if (group_size < 0)
3826 stub_group_size = -group_size;
3827 else
3828 stub_group_size = group_size;
3829 if (stub_group_size == 1)
3830 {
3831 /* Default values. */
3832 /* FIXME: not sure what these values should be */
3833 if (stubs_always_before_branch)
3834 {
3835 stub_group_size = (1 << BRANCH_BITS);
3836 }
3837 else
3838 {
3839 stub_group_size = (1 << BRANCH_BITS);
3840 }
3841 }
3842
3843 group_sections (htab, stub_group_size, stubs_always_before_branch);
3844
3845 switch (get_local_syms (output_bfd, info->input_bfds, info))
3846 {
3847 default:
3848 if (htab->all_local_syms)
3849 goto error_ret_free_local;
3850 return FALSE;
3851
3852 case 0:
3853 stub_changed = FALSE;
3854 break;
3855
3856 case 1:
3857 stub_changed = TRUE;
3858 break;
3859 }
3860
3861 while (1)
3862 {
3863 bfd *input_bfd;
3864 unsigned int bfd_indx;
3865 asection *stub_sec;
3866
3867 for (input_bfd = info->input_bfds, bfd_indx = 0;
3868 input_bfd != NULL;
3869 input_bfd = input_bfd->link.next, bfd_indx++)
3870 {
3871 Elf_Internal_Shdr *symtab_hdr;
3872 asection *section;
3873 Elf_Internal_Sym *local_syms;
3874
3875 /* We'll need the symbol table in a second. */
3876 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3877 if (symtab_hdr->sh_info == 0)
3878 continue;
3879
3880 local_syms = htab->all_local_syms[bfd_indx];
3881
3882 /* Walk over each section attached to the input bfd. */
3883 for (section = input_bfd->sections;
3884 section != NULL;
3885 section = section->next)
3886 {
3887 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3888
3889 /* If there aren't any relocs, then there's nothing more
3890 to do. */
3891 if ((section->flags & SEC_RELOC) == 0
3892 || section->reloc_count == 0)
3893 continue;
3894
3895 /* If this section is a link-once section that will be
3896 discarded, then don't create any stubs. */
3897 if (section->output_section == NULL
3898 || section->output_section->owner != output_bfd)
3899 continue;
3900
3901 /* Get the relocs. */
3902 internal_relocs
3903 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
3904 info->keep_memory);
3905 if (internal_relocs == NULL)
3906 goto error_ret_free_local;
3907
3908 /* Now examine each relocation. */
3909 irela = internal_relocs;
3910 irelaend = irela + section->reloc_count;
3911 for (; irela < irelaend; irela++)
3912 {
3913 unsigned int r_type, r_indx;
3914 enum elf_metag_stub_type stub_type;
3915 struct elf_metag_stub_hash_entry *hsh;
3916 asection *sym_sec;
3917 bfd_vma sym_value;
3918 bfd_vma destination;
3919 struct elf_metag_link_hash_entry *hh;
3920 char *stub_name;
3921 const asection *id_sec;
3922
3923 r_type = ELF32_R_TYPE (irela->r_info);
3924 r_indx = ELF32_R_SYM (irela->r_info);
3925
3926 if (r_type >= (unsigned int) R_METAG_MAX)
3927 {
3928 bfd_set_error (bfd_error_bad_value);
3929 error_ret_free_internal:
3930 if (elf_section_data (section)->relocs == NULL)
3931 free (internal_relocs);
3932 goto error_ret_free_local;
3933 }
3934
3935 /* Only look for stubs on CALLR and B instructions. */
3936 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
3937 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
3938 continue;
3939
3940 /* Now determine the call target, its name, value,
3941 section. */
3942 sym_sec = NULL;
3943 sym_value = 0;
3944 destination = 0;
3945 hh = NULL;
3946 if (r_indx < symtab_hdr->sh_info)
3947 {
3948 /* It's a local symbol. */
3949 Elf_Internal_Sym *sym;
3950 Elf_Internal_Shdr *hdr;
3951 unsigned int shndx;
3952
3953 sym = local_syms + r_indx;
3954 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3955 sym_value = sym->st_value;
3956 shndx = sym->st_shndx;
3957 if (shndx < elf_numsections (input_bfd))
3958 {
3959 hdr = elf_elfsections (input_bfd)[shndx];
3960 sym_sec = hdr->bfd_section;
3961 destination = (sym_value + irela->r_addend
3962 + sym_sec->output_offset
3963 + sym_sec->output_section->vma);
3964 }
3965 }
3966 else
3967 {
3968 /* It's an external symbol. */
3969 int e_indx;
3970
3971 e_indx = r_indx - symtab_hdr->sh_info;
3972 hh = ((struct elf_metag_link_hash_entry *)
3973 elf_sym_hashes (input_bfd)[e_indx]);
3974
3975 while (hh->eh.root.type == bfd_link_hash_indirect
3976 || hh->eh.root.type == bfd_link_hash_warning)
3977 hh = ((struct elf_metag_link_hash_entry *)
3978 hh->eh.root.u.i.link);
3979
3980 if (hh->eh.root.type == bfd_link_hash_defined
3981 || hh->eh.root.type == bfd_link_hash_defweak)
3982 {
3983 sym_sec = hh->eh.root.u.def.section;
3984 sym_value = hh->eh.root.u.def.value;
3985 if (hh->eh.plt.offset != (bfd_vma) -1
3986 && hh->eh.dynindx != -1
3987 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
3988 {
3989 sym_sec = htab->etab.splt;
3990 sym_value = hh->eh.plt.offset;
3991 }
3992
3993 if (sym_sec->output_section != NULL)
3994 destination = (sym_value + irela->r_addend
3995 + sym_sec->output_offset
3996 + sym_sec->output_section->vma);
3997 else
3998 continue;
3999 }
4000 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4001 {
4002 if (! bfd_link_pic (info))
4003 continue;
4004 }
4005 else if (hh->eh.root.type == bfd_link_hash_undefined)
4006 {
4007 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4008 && (ELF_ST_VISIBILITY (hh->eh.other)
4009 == STV_DEFAULT)))
4010 continue;
4011 }
4012 else
4013 {
4014 bfd_set_error (bfd_error_bad_value);
4015 goto error_ret_free_internal;
4016 }
4017 }
4018
4019 /* Determine what (if any) linker stub is needed. */
4020 stub_type = metag_type_of_stub (section, irela, hh,
4021 destination, info);
4022 if (stub_type == metag_stub_none)
4023 continue;
4024
4025 /* Support for grouping stub sections. */
4026 id_sec = htab->stub_group[section->id].link_sec;
4027
4028 /* Get the name of this stub. */
4029 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4030 if (!stub_name)
4031 goto error_ret_free_internal;
4032
4033 hsh = metag_stub_hash_lookup (&htab->bstab,
4034 stub_name,
4035 FALSE, FALSE);
4036 if (hsh != NULL)
4037 {
4038 /* The proper stub has already been created. */
4039 free (stub_name);
4040 continue;
4041 }
4042
4043 hsh = metag_add_stub (stub_name, section, htab);
4044 if (hsh == NULL)
4045 {
4046 free (stub_name);
4047 goto error_ret_free_internal;
4048 }
4049 hsh->target_value = sym_value;
4050 hsh->target_section = sym_sec;
4051 hsh->stub_type = stub_type;
4052 hsh->hh = hh;
4053 hsh->addend = irela->r_addend;
4054 stub_changed = TRUE;
4055 }
4056
4057 /* We're done with the internal relocs, free them. */
4058 if (elf_section_data (section)->relocs == NULL)
4059 free (internal_relocs);
4060 }
4061 }
4062
4063 if (!stub_changed)
4064 break;
4065
4066 /* OK, we've added some stubs. Find out the new size of the
4067 stub sections. */
4068 for (stub_sec = htab->stub_bfd->sections;
4069 stub_sec != NULL;
4070 stub_sec = stub_sec->next)
4071 stub_sec->size = 0;
4072
4073 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4074
4075 /* Ask the linker to do its stuff. */
4076 (*htab->layout_sections_again) ();
4077 stub_changed = FALSE;
4078 }
4079
4080 free (htab->all_local_syms);
4081 return TRUE;
4082
4083 error_ret_free_local:
4084 free (htab->all_local_syms);
4085 return FALSE;
4086 }
4087
4088 /* Build all the stubs associated with the current output file. The
4089 stubs are kept in a hash table attached to the main linker hash
4090 table. This function is called via metagelf_finish in the linker. */
4091
4092 bfd_boolean
4093 elf_metag_build_stubs (struct bfd_link_info *info)
4094 {
4095 asection *stub_sec;
4096 struct bfd_hash_table *table;
4097 struct elf_metag_link_hash_table *htab;
4098
4099 htab = metag_link_hash_table (info);
4100
4101 for (stub_sec = htab->stub_bfd->sections;
4102 stub_sec != NULL;
4103 stub_sec = stub_sec->next)
4104 {
4105 bfd_size_type size;
4106
4107 /* Allocate memory to hold the linker stubs. */
4108 size = stub_sec->size;
4109 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4110 if (stub_sec->contents == NULL && size != 0)
4111 return FALSE;
4112 stub_sec->size = 0;
4113 }
4114
4115 /* Build the stubs as directed by the stub hash table. */
4116 table = &htab->bstab;
4117 bfd_hash_traverse (table, metag_build_one_stub, info);
4118
4119 return TRUE;
4120 }
4121
4122 /* Return TRUE if SYM represents a local label symbol. */
4123
4124 static bfd_boolean
4125 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4126 {
4127 if (name[0] == '$' && name[1] == 'L')
4128 return 1;
4129 return _bfd_elf_is_local_label_name (abfd, name);
4130 }
4131
4132 /* Return address for Ith PLT stub in section PLT, for relocation REL
4133 or (bfd_vma) -1 if it should not be included. */
4134
4135 static bfd_vma
4136 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4137 const arelent *rel ATTRIBUTE_UNUSED)
4138 {
4139 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4140 }
4141
4142 #define ELF_ARCH bfd_arch_metag
4143 #define ELF_TARGET_ID METAG_ELF_DATA
4144 #define ELF_MACHINE_CODE EM_METAG
4145 #define ELF_MINPAGESIZE 0x1000
4146 #define ELF_MAXPAGESIZE 0x4000
4147 #define ELF_COMMONPAGESIZE 0x1000
4148
4149 #define TARGET_LITTLE_SYM metag_elf32_vec
4150 #define TARGET_LITTLE_NAME "elf32-metag"
4151
4152 #define elf_symbol_leading_char '_'
4153
4154 #define elf_info_to_howto_rel NULL
4155 #define elf_info_to_howto metag_info_to_howto_rela
4156
4157 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4158 #define bfd_elf32_bfd_link_hash_table_create \
4159 elf_metag_link_hash_table_create
4160 #define elf_backend_relocate_section elf_metag_relocate_section
4161 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4162 #define elf_backend_check_relocs elf_metag_check_relocs
4163 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4164 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4165 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4166 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4167 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4168 #define elf_backend_omit_section_dynsym \
4169 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4170 #define elf_backend_post_process_headers elf_metag_post_process_headers
4171 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4172 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4173 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4174
4175 #define elf_backend_can_gc_sections 1
4176 #define elf_backend_can_refcount 1
4177 #define elf_backend_rela_normal 1
4178 #define elf_backend_want_got_plt 1
4179 #define elf_backend_want_got_sym 0
4180 #define elf_backend_want_plt_sym 0
4181 #define elf_backend_plt_readonly 1
4182 #define elf_backend_dtrel_excludes_plt 1
4183 #define elf_backend_want_dynrelro 1
4184
4185 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4186 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4187
4188 #include "elf32-target.h"
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