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[binutils.git] / bfd / elf32-metag.c
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a3c62988 1/* Meta support for 32-bit ELF
b90efa5b 2 Copyright (C) 2013-2015 Free Software Foundation, Inc.
a3c62988
NC		 3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22#include "sysdep.h"
23#include "bfd.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
26#include "elf32-metag.h"
27#include "elf/metag.h"
28
29#define GOT_ENTRY_SIZE 4
30#define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32/* ABI version:
33 0 - original
34 1 - with GOT offset */
35#define METAG_ELF_ABI_VERSION 1
36
37static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73/* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93#define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95static reloc_howto_type elf_metag_howto_table[] =
96{
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
6346d5ca 145 3, /* size (0 = byte, 1 = short, 2 = long) */
a3c62988
NC		 146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681};
682
683#define BRANCH_BITS 19
684
685/* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694#define GOT_REG_OFFSET 0x2000
695
696struct metag_reloc_map
697{
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700};
701
702static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746enum elf_metag_stub_type
747{
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751};
752
753struct elf_metag_stub_hash_entry
754{
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780};
781
782struct elf_metag_link_hash_entry
783{
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811};
812
813struct elf_metag_link_hash_table
814{
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sgot;
847 asection *sgotplt;
848 asection *srelgot;
849 asection *splt;
850 asection *srelplt;
851 asection *sdynbss;
852 asection *srelbss;
853
854 /* Small local sym cache. */
855 struct sym_cache sym_cache;
856
857 /* Data for LDM relocations. */
858 union
859 {
860 bfd_signed_vma refcount;
861 bfd_vma offset;
862 } tls_ldm_got;
863};
864
865/* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
867 segment p_vaddr. */
868static bfd_vma
869dtpoff_base (struct bfd_link_info *info)
870{
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info)->tls_sec == NULL)
873 return 0;
874 return elf_hash_table (info)->tls_sec->vma;
875}
876
877/* Return the relocation value for R_METAG_TLS_IE */
878static bfd_vma
879tpoff (struct bfd_link_info *info, bfd_vma address)
880{
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info)->tls_sec == NULL)
883 return 0;
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address - elf_hash_table (info)->tls_sec->vma
887 + align_power ((bfd_vma) 8,
888 elf_hash_table (info)->tls_sec->alignment_power));
889}
890
891static void
892metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
893 arelent *cache_ptr,
894 Elf_Internal_Rela *dst)
895{
896 unsigned int r_type;
897
898 r_type = ELF32_R_TYPE (dst->r_info);
5860e3f8
NC		 899 if (r_type >= (unsigned int) R_METAG_MAX)
900 {
64d29018 901 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
5860e3f8
NC		 902 r_type = 0;
903 }
a3c62988
NC		 904 cache_ptr->howto = & elf_metag_howto_table [r_type];
905}
906
907static reloc_howto_type *
908metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
909 bfd_reloc_code_real_type code)
910{
911 unsigned int i;
912
913 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
914 if (metag_reloc_map [i].bfd_reloc_val == code)
915 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
916
917 return NULL;
918}
919
920static reloc_howto_type *
921metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
922 const char *r_name)
923{
924 unsigned int i;
925
926 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
927 if (elf_metag_howto_table[i].name != NULL
928 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
929 return &elf_metag_howto_table[i];
930
931 return NULL;
932}
933
934/* Various hash macros and functions. */
935#define metag_link_hash_table(p) \
936 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
937 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
938
939#define metag_elf_hash_entry(ent) \
940 ((struct elf_metag_link_hash_entry *)(ent))
941
942#define metag_stub_hash_entry(ent) \
943 ((struct elf_metag_stub_hash_entry *)(ent))
944
945#define metag_stub_hash_lookup(table, string, create, copy) \
946 ((struct elf_metag_stub_hash_entry *) \
947 bfd_hash_lookup ((table), (string), (create), (copy)))
948
949#define metag_elf_local_got_tls_type(abfd) \
950 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
951
952/* Assorted hash table functions. */
953
954/* Initialize an entry in the stub hash table. */
955
956static struct bfd_hash_entry *
957stub_hash_newfunc (struct bfd_hash_entry *entry,
958 struct bfd_hash_table *table,
959 const char *string)
960{
961 /* Allocate the structure if it has not already been allocated by a
962 subclass. */
963 if (entry == NULL)
964 {
965 entry = bfd_hash_allocate (table,
966 sizeof (struct elf_metag_stub_hash_entry));
967 if (entry == NULL)
968 return entry;
969 }
970
971 /* Call the allocation method of the superclass. */
972 entry = bfd_hash_newfunc (entry, table, string);
973 if (entry != NULL)
974 {
975 struct elf_metag_stub_hash_entry *hsh;
976
977 /* Initialize the local fields. */
978 hsh = (struct elf_metag_stub_hash_entry *) entry;
979 hsh->stub_sec = NULL;
980 hsh->stub_offset = 0;
981 hsh->target_value = 0;
982 hsh->target_section = NULL;
983 hsh->stub_type = metag_stub_long_branch;
984 hsh->hh = NULL;
985 hsh->id_sec = NULL;
986 }
987
988 return entry;
989}
990
991/* Initialize an entry in the link hash table. */
992
993static struct bfd_hash_entry *
994metag_link_hash_newfunc (struct bfd_hash_entry *entry,
995 struct bfd_hash_table *table,
996 const char *string)
997{
998 /* Allocate the structure if it has not already been allocated by a
999 subclass. */
1000 if (entry == NULL)
1001 {
1002 entry = bfd_hash_allocate (table,
1003 sizeof (struct elf_metag_link_hash_entry));
1004 if (entry == NULL)
1005 return entry;
1006 }
1007
1008 /* Call the allocation method of the superclass. */
1009 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1010 if (entry != NULL)
1011 {
1012 struct elf_metag_link_hash_entry *hh;
1013
1014 /* Initialize the local fields. */
1015 hh = (struct elf_metag_link_hash_entry *) entry;
1016 hh->hsh_cache = NULL;
1017 hh->dyn_relocs = NULL;
1018 hh->tls_type = GOT_UNKNOWN;
1019 }
1020
1021 return entry;
1022}
1023
68faa637
AM		 1024/* Free the derived linker hash table. */
1025
1026static void
d495ab0d 1027elf_metag_link_hash_table_free (bfd *obfd)
68faa637
AM		 1028{
1029 struct elf_metag_link_hash_table *htab
d495ab0d 1030 = (struct elf_metag_link_hash_table *) obfd->link.hash;
68faa637
AM		 1031
1032 bfd_hash_table_free (&htab->bstab);
d495ab0d 1033 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1034}
1035
a3c62988
NC		 1036/* Create the derived linker hash table. The Meta ELF port uses the derived
1037 hash table to keep information specific to the Meta ELF linker (without
1038 using static variables). */
1039
1040static struct bfd_link_hash_table *
1041elf_metag_link_hash_table_create (bfd *abfd)
1042{
1043 struct elf_metag_link_hash_table *htab;
1044 bfd_size_type amt = sizeof (*htab);
1045
7bf52ea2 1046 htab = bfd_zmalloc (amt);
a3c62988
NC		 1047 if (htab == NULL)
1048 return NULL;
1049
1050 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1051 metag_link_hash_newfunc,
1052 sizeof (struct elf_metag_link_hash_entry),
1053 METAG_ELF_DATA))
1054 {
1055 free (htab);
1056 return NULL;
1057 }
1058
1059 /* Init the stub hash table too. */
1060 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1061 sizeof (struct elf_metag_stub_hash_entry)))
d495ab0d
AM		 1062 {
1063 _bfd_elf_link_hash_table_free (abfd);
1064 return NULL;
1065 }
1066 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
a3c62988 1067
a3c62988
NC		 1068 return &htab->etab.root;
1069}
1070
a3c62988
NC		 1071/* Section name for stubs is the associated section name plus this
1072 string. */
1073#define STUB_SUFFIX ".stub"
1074
1075/* Build a name for an entry in the stub hash table. */
1076
1077static char *
1078metag_stub_name (const asection *input_section,
1079 const asection *sym_sec,
1080 const struct elf_metag_link_hash_entry *hh,
1081 const Elf_Internal_Rela *rel)
1082{
1083 char *stub_name;
1084 bfd_size_type len;
1085
1086 if (hh)
1087 {
1088 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1089 stub_name = bfd_malloc (len);
1090 if (stub_name != NULL)
1091 {
1092 sprintf (stub_name, "%08x_%s+%x",
1093 input_section->id & 0xffffffff,
1094 hh->eh.root.root.string,
1095 (int) rel->r_addend & 0xffffffff);
1096 }
1097 }
1098 else
1099 {
1100 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1101 stub_name = bfd_malloc (len);
1102 if (stub_name != NULL)
1103 {
1104 sprintf (stub_name, "%08x_%x:%x+%x",
1105 input_section->id & 0xffffffff,
1106 sym_sec->id & 0xffffffff,
1107 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1108 (int) rel->r_addend & 0xffffffff);
1109 }
1110 }
1111 return stub_name;
1112}
1113
1114/* Look up an entry in the stub hash. Stub entries are cached because
1115 creating the stub name takes a bit of time. */
1116
1117static struct elf_metag_stub_hash_entry *
1118metag_get_stub_entry (const asection *input_section,
1119 const asection *sym_sec,
1120 struct elf_metag_link_hash_entry *hh,
1121 const Elf_Internal_Rela *rel,
1122 struct elf_metag_link_hash_table *htab)
1123{
1124 struct elf_metag_stub_hash_entry *hsh;
1125 const asection *id_sec;
1126
1127 /* If this input section is part of a group of sections sharing one
1128 stub section, then use the id of the first section in the group.
1129 Stub names need to include a section id, as there may well be
1130 more than one stub used to reach say, printf, and we need to
1131 distinguish between them. */
1132 id_sec = htab->stub_group[input_section->id].link_sec;
1133
1134 if (hh != NULL && hh->hsh_cache != NULL
1135 && hh->hsh_cache->hh == hh
1136 && hh->hsh_cache->id_sec == id_sec)
1137 {
1138 hsh = hh->hsh_cache;
1139 }
1140 else
1141 {
1142 char *stub_name;
1143
1144 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1145 if (stub_name == NULL)
1146 return NULL;
1147
1148 hsh = metag_stub_hash_lookup (&htab->bstab,
1149 stub_name, FALSE, FALSE);
1150
1151 if (hh != NULL)
1152 hh->hsh_cache = hsh;
1153
1154 free (stub_name);
1155 }
1156
1157 return hsh;
1158}
1159
1160/* Add a new stub entry to the stub hash. Not all fields of the new
1161 stub entry are initialised. */
1162
1163static struct elf_metag_stub_hash_entry *
1164metag_add_stub (const char *stub_name,
1165 asection *section,
1166 struct elf_metag_link_hash_table *htab)
1167{
1168 asection *link_sec;
1169 asection *stub_sec;
1170 struct elf_metag_stub_hash_entry *hsh;
1171
1172 link_sec = htab->stub_group[section->id].link_sec;
1173 stub_sec = htab->stub_group[section->id].stub_sec;
1174 if (stub_sec == NULL)
1175 {
1176 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1177 if (stub_sec == NULL)
1178 {
1179 size_t namelen;
1180 bfd_size_type len;
1181 char *s_name;
1182
1183 namelen = strlen (link_sec->name);
1184 len = namelen + sizeof (STUB_SUFFIX);
1185 s_name = bfd_alloc (htab->stub_bfd, len);
1186 if (s_name == NULL)
1187 return NULL;
1188
1189 memcpy (s_name, link_sec->name, namelen);
1190 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1191
1192 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1193 if (stub_sec == NULL)
1194 return NULL;
1195 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1196 }
1197 htab->stub_group[section->id].stub_sec = stub_sec;
1198 }
1199
1200 /* Enter this entry into the linker stub hash table. */
1201 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1202 TRUE, FALSE);
1203 if (hsh == NULL)
1204 {
1205 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
1206 section->owner,
1207 stub_name);
1208 return NULL;
1209 }
1210
1211 hsh->stub_sec = stub_sec;
1212 hsh->stub_offset = 0;
1213 hsh->id_sec = link_sec;
1214 return hsh;
1215}
1216
1217/* Check a signed integer value can be represented in the given number
1218 of bits. */
1219
1220static bfd_boolean
1221within_signed_range (int value, unsigned int bits)
1222{
1223 int min_val = -(1 << (bits - 1));
1224 int max_val = (1 << (bits - 1)) - 1;
1225 return (value <= max_val) && (value >= min_val);
1226}
1227
1228/* Perform a relocation as part of a final link. */
1229
1230static bfd_reloc_status_type
1231metag_final_link_relocate (reloc_howto_type *howto,
1232 bfd *input_bfd,
1233 asection *input_section,
1234 bfd_byte *contents,
1235 Elf_Internal_Rela *rel,
1236 bfd_vma relocation,
1237 struct elf_metag_link_hash_entry *hh,
1238 struct elf_metag_link_hash_table *htab,
1239 asection *sym_sec)
1240{
1241 bfd_reloc_status_type r = bfd_reloc_ok;
1242 bfd_byte *hit_data = contents + rel->r_offset;
1243 int opcode, op_shift, op_extended, l1, l2;
1244 bfd_signed_vma srel, addend = rel->r_addend;
1245 struct elf_metag_stub_hash_entry *hsh = NULL;
1246 bfd_vma location;
1247
1248 /* Find out where we are and where we're going. */
1249 location = (rel->r_offset +
1250 input_section->output_offset +
1251 input_section->output_section->vma);
1252
1253 switch (howto->type)
1254 {
1255 case R_METAG_RELBRANCH:
1256 case R_METAG_RELBRANCH_PLT:
1257 /* Make it a pc relative offset. */
1258 relocation -= location;
1259 break;
1260 case R_METAG_TLS_GD:
1261 case R_METAG_TLS_IE:
1262 relocation -= elf_gp (input_section->output_section->owner);
1263 break;
1264 default:
1265 break;
1266 }
1267
1268 switch (howto->type)
1269 {
1270 case R_METAG_RELBRANCH_PLT:
1271 case R_METAG_RELBRANCH:
1272 opcode = bfd_get_32 (input_bfd, hit_data);
1273
1274 srel = (bfd_signed_vma) relocation;
1275 srel += addend;
1276
1277 /* If the branch is out of reach, then redirect the
1278 call to the local stub for this function. */
1279 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1280 (srel < - (1 << (BRANCH_BITS + 1))))
1281 {
1282 if (sym_sec == NULL)
1283 break;
1284
1285 hsh = metag_get_stub_entry (input_section, sym_sec,
1286 hh, rel, htab);
1287 if (hsh == NULL)
1288 return bfd_reloc_undefined;
1289
1290 /* Munge up the value and addend so that we call the stub
1291 rather than the procedure directly. */
1292 srel = (hsh->stub_offset
1293 + hsh->stub_sec->output_offset
1294 + hsh->stub_sec->output_section->vma);
1295 srel -= location;
1296 }
1297
1298 srel = srel >> 2;
1299
1300 if (!within_signed_range (srel, BRANCH_BITS))
1301 {
1302 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1303 srel = 0;
1304 else
1305 return bfd_reloc_overflow;
1306 }
1307
1308 opcode &= ~(0x7ffff << 5);
1309 opcode |= ((srel & 0x7ffff) << 5);
1310
1311 bfd_put_32 (input_bfd, opcode, hit_data);
1312 break;
1313 case R_METAG_GETSETOFF:
1314 case R_METAG_GETSET_GOT:
1315 case R_METAG_GETSET_GOTOFF:
1316 opcode = bfd_get_32 (input_bfd, hit_data);
1317
1318 srel = (bfd_signed_vma) relocation;
1319 srel += addend;
1320
1321 /* Is this a standard or extended GET/SET? */
1322 if ((opcode & 0xf0000000) == 0xa0000000)
1323 {
1324 /* Extended GET/SET. */
1325 l1 = opcode & 0x2;
1326 l2 = opcode & 0x4;
1327 op_extended = 1;
1328 }
1329 else
1330 {
1331 /* Standard GET/SET. */
1332 l1 = opcode & 0x01000000;
1333 l2 = opcode & 0x04000000;
1334 op_extended = 0;
1335 }
1336
1337 /* Calculate the width of the GET/SET and how much we need to
1338 shift the result by. */
1339 if (l2)
1340 if (l1)
1341 op_shift = 3;
1342 else
1343 op_shift = 2;
1344 else
1345 if (l1)
1346 op_shift = 1;
1347 else
1348 op_shift = 0;
1349
1350 /* GET/SET offsets are scaled by the width of the transfer. */
1351 srel = srel >> op_shift;
1352
1353 /* Extended GET/SET has signed 12 bits of offset, standard has
1354 signed 6 bits. */
1355 if (op_extended)
1356 {
1357 if (!within_signed_range (srel, 12))
1358 {
1359 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1360 srel = 0;
1361 else
1362 return bfd_reloc_overflow;
1363 }
1364 opcode &= ~(0xfff << 7);
1365 opcode |= ((srel & 0xfff) << 7);
1366 }
1367 else
1368 {
1369 if (!within_signed_range (srel, 5))
1370 {
1371 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1372 srel = 0;
1373 else
1374 return bfd_reloc_overflow;
1375 }
1376 opcode &= ~(0x3f << 8);
1377 opcode |= ((srel & 0x3f) << 8);
1378 }
1379
1380 bfd_put_32 (input_bfd, opcode, hit_data);
1381 break;
1382 case R_METAG_TLS_GD:
1383 case R_METAG_TLS_LDM:
1384 opcode = bfd_get_32 (input_bfd, hit_data);
1385
1386 if ((bfd_signed_vma)relocation < 0)
1387 {
1388 /* sign extend immediate */
1389 if ((opcode & 0xf2000001) == 0x02000000)
1390 {
1391 /* ADD De.e,Dx.r,#I16 */
1392 /* set SE bit */
1393 opcode |= (1 << 1);
1394 } else
1395 return bfd_reloc_overflow;
1396 }
1397
1398 bfd_put_32 (input_bfd, opcode, hit_data);
1399
1400 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1401 contents, rel->r_offset,
1402 relocation, rel->r_addend);
1403 break;
1404 default:
1405 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1406 contents, rel->r_offset,
1407 relocation, rel->r_addend);
1408 }
1409
1410 return r;
1411}
1412
1413/* This is defined because R_METAG_NONE != 0...
1414 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1415#define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1416 rel, relend, howto, contents) \
1417 { \
1418 _bfd_clear_contents (howto, input_bfd, input_section, \
1419 contents + rel->r_offset); \
1420 \
1421 if (info->relocatable \
1422 && (input_section->flags & SEC_DEBUGGING)) \
1423 { \
1424 /* Only remove relocations in debug sections since other \
1425 sections may require relocations. */ \
1426 Elf_Internal_Shdr *rel_hdr; \
1427 \
1428 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1429 \
1430 /* Avoid empty output section. */ \
1431 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1432 { \
1433 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1434 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1435 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1436 \
1437 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1438 \
1439 input_section->reloc_count--; \
1440 relend--; \
1441 rel--; \
1442 continue; \
1443 } \
1444 } \
1445 \
1446 rel->r_info = R_METAG_NONE; \
1447 rel->r_addend = 0; \
1448 continue; \
1449 }
1450
1451/* Relocate a META ELF section.
1452
1453The RELOCATE_SECTION function is called by the new ELF backend linker
1454to handle the relocations for a section.
1455
1456The relocs are always passed as Rela structures; if the section
1457actually uses Rel structures, the r_addend field will always be
1458zero.
1459
1460This function is responsible for adjusting the section contents as
1461necessary, and (if using Rela relocs and generating a relocatable
1462output file) adjusting the reloc addend as necessary.
1463
1464This function does not have to worry about setting the reloc
1465address or the reloc symbol index.
1466
1467LOCAL_SYMS is a pointer to the swapped in local symbols.
1468
1469LOCAL_SECTIONS is an array giving the section in the input file
1470corresponding to the st_shndx field of each local symbol.
1471
1472The global hash table entry for the global symbols can be found
1473via elf_sym_hashes (input_bfd).
1474
1475When generating relocatable output, this function must handle
1476STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1477going to be the section symbol corresponding to the output
1478section, which means that the addend must be adjusted
1479accordingly. */
1480
1481static bfd_boolean
1482elf_metag_relocate_section (bfd *output_bfd,
1483 struct bfd_link_info *info,
1484 bfd *input_bfd,
1485 asection *input_section,
1486 bfd_byte *contents,
1487 Elf_Internal_Rela *relocs,
1488 Elf_Internal_Sym *local_syms,
1489 asection **local_sections)
1490{
1491 bfd_vma *local_got_offsets;
1492 Elf_Internal_Shdr *symtab_hdr;
1493 struct elf_link_hash_entry **eh_syms;
1494 struct elf_metag_link_hash_table *htab;
1495 Elf_Internal_Rela *rel;
1496 Elf_Internal_Rela *relend;
1497 asection *sreloc;
1498
1499 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1500 eh_syms = elf_sym_hashes (input_bfd);
1501 relend = relocs + input_section->reloc_count;
1502
1503 htab = metag_link_hash_table (info);
1504 local_got_offsets = elf_local_got_offsets (input_bfd);
1505
1506 sreloc = NULL;
1507
1508 for (rel = relocs; rel < relend; rel ++)
1509 {
1510 reloc_howto_type *howto;
1511 unsigned long r_symndx;
1512 Elf_Internal_Sym *sym;
1513 asection *sec;
1514 struct elf_metag_link_hash_entry *hh;
1515 bfd_vma relocation;
1516 bfd_reloc_status_type r;
1517 const char *name;
1518 int r_type;
1519
1520 r_type = ELF32_R_TYPE (rel->r_info);
1521
1522 if (r_type == R_METAG_GNU_VTINHERIT
1523 || r_type == R_METAG_GNU_VTENTRY
1524 || r_type == R_METAG_NONE)
1525 continue;
1526
1527 r_symndx = ELF32_R_SYM (rel->r_info);
1528
1529 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1530 hh = NULL;
1531 sym = NULL;
1532 sec = NULL;
1533
1534 if (r_symndx < symtab_hdr->sh_info)
1535 {
1536 sym = local_syms + r_symndx;
1537 sec = local_sections [r_symndx];
1538 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1539
1540 name = bfd_elf_string_from_elf_section
1541 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1542 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1543 }
1544 else
1545 {
1546 struct elf_link_hash_entry *eh;
62d887d4 1547 bfd_boolean unresolved_reloc, warned, ignored;
a3c62988
NC		 1548
1549 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1550 r_symndx, symtab_hdr, eh_syms,
1551 eh, sec, relocation,
62d887d4 1552 unresolved_reloc, warned, ignored);
a3c62988
NC		 1553
1554 name = eh->root.root.string;
1555 hh = (struct elf_metag_link_hash_entry *) eh;
1556 }
1557
1558 if (sec != NULL && discarded_section (sec))
1559 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1560 rel, relend, howto, contents);
1561
1562 if (info->relocatable)
1563 continue;
1564
1565 switch (r_type)
1566 {
1567 case R_METAG_ADDR32:
1568 case R_METAG_RELBRANCH:
1569 if ((input_section->flags & SEC_ALLOC) == 0)
1570 break;
1571
1572 if ((info->shared
1573 && r_symndx != STN_UNDEF
1574 && (input_section->flags & SEC_ALLOC) != 0
1575 && (r_type != R_METAG_RELBRANCH
1576 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1577 || (!info->shared
1578 && hh != NULL
1579 && hh->eh.dynindx != -1
1580 && !hh->eh.non_got_ref
1581 && ((hh->eh.def_dynamic
1582 && !hh->eh.def_regular)
1583 || hh->eh.root.type == bfd_link_hash_undefweak
1584 || hh->eh.root.type == bfd_link_hash_undefined)))
1585 {
1586 Elf_Internal_Rela outrel;
1587 bfd_boolean skip, relocate;
1588 bfd_byte *loc;
1589
1590 /* When generating a shared object, these relocations
1591 are copied into the output file to be resolved at run
1592 time. */
1593
1594 sreloc = elf_section_data (input_section)->sreloc;
1595 BFD_ASSERT (sreloc != NULL);
1596
1597 skip = FALSE;
1598 relocate = FALSE;
1599
1600 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1601 info,
1602 input_section,
1603 rel->r_offset);
1604 if (outrel.r_offset == (bfd_vma) -1)
1605 skip = TRUE;
1606 else if (outrel.r_offset == (bfd_vma) -2)
1607 skip = TRUE, relocate = TRUE;
1608 outrel.r_offset += (input_section->output_section->vma
1609 + input_section->output_offset);
1610
1611 if (skip)
1612 {
1613 memset (&outrel, 0, sizeof outrel);
1614 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1615 }
1616 else if (r_type == R_METAG_RELBRANCH)
1617 {
1618 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1619 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1620 outrel.r_addend = rel->r_addend;
1621 }
1622 else
1623 {
1624 /* h->dynindx may be -1 if this symbol was marked to
1625 become local. */
1626 if (hh == NULL
1627 || ((info->symbolic || hh->eh.dynindx == -1)
1628 && hh->eh.def_regular))
1629 {
1630 relocate = TRUE;
1631 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1632 outrel.r_addend = relocation + rel->r_addend;
1633 }
1634 else
1635 {
1636 BFD_ASSERT (hh->eh.dynindx != -1);
1637 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1638 outrel.r_addend = rel->r_addend;
1639 }
1640 }
1641
1642 loc = sreloc->contents;
1643 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1644 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1645 ++sreloc->reloc_count;
1646
1647 /* If this reloc is against an external symbol, we do
1648 not want to fiddle with the addend. Otherwise, we
1649 need to include the symbol value so that it becomes
1650 an addend for the dynamic reloc. */
1651 if (! relocate)
1652 continue;
1653 }
1654 break;
1655
1656 case R_METAG_RELBRANCH_PLT:
1657 /* Relocation is to the entry for this symbol in the
1658 procedure linkage table. */
1659
1660 if (hh == NULL)
1661 break;
1662
1663 if (hh->eh.forced_local)
1664 break;
1665
1666 if (hh->eh.plt.offset == (bfd_vma) -1 ||
1667 htab->splt == NULL)
1668 {
1669 /* We didn't make a PLT entry for this symbol. This
1670 happens when statically linking PIC code, or when
1671 using -Bsymbolic. */
1672 break;
1673 }
1674
1675 relocation = (htab->splt->output_section->vma
1676 + htab->splt->output_offset
1677 + hh->eh.plt.offset);
1678 break;
1679 case R_METAG_HI16_GOTPC:
1680 case R_METAG_LO16_GOTPC:
1681 BFD_ASSERT (htab->sgot != NULL);
1682
1683 relocation = (htab->sgot->output_section->vma +
1684 htab->sgot->output_offset);
1685 relocation += GOT_REG_OFFSET;
1686 relocation -= (input_section->output_section->vma
1687 + input_section->output_offset
1688 + rel->r_offset);
1689 break;
1690 case R_METAG_HI16_GOTOFF:
1691 case R_METAG_LO16_GOTOFF:
1692 case R_METAG_GETSET_GOTOFF:
1693 BFD_ASSERT (htab->sgot != NULL);
1694
1695 relocation -= (htab->sgot->output_section->vma +
1696 htab->sgot->output_offset);
1697 relocation -= GOT_REG_OFFSET;
1698 break;
1699 case R_METAG_GETSET_GOT:
1700 {
1701 bfd_vma off;
1702 bfd_boolean do_got = 0;
1703
1704 /* Relocation is to the entry for this symbol in the
1705 global offset table. */
1706 if (hh != NULL)
1707 {
1708 bfd_boolean dyn;
1709
1710 off = hh->eh.got.offset;
1711 dyn = htab->etab.dynamic_sections_created;
1712 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
1713 &hh->eh))
1714 {
1715 /* If we aren't going to call finish_dynamic_symbol,
1716 then we need to handle initialisation of the .got
1717 entry and create needed relocs here. Since the
1718 offset must always be a multiple of 4, we use the
1719 least significant bit to record whether we have
1720 initialised it already. */
1721 if ((off & 1) != 0)
1722 off &= ~1;
1723 else
1724 {
1725 hh->eh.got.offset |= 1;
1726 do_got = 1;
1727 }
1728 }
1729 }
1730 else
1731 {
1732 /* Local symbol case. */
1733 if (local_got_offsets == NULL)
1734 abort ();
1735
1736 off = local_got_offsets[r_symndx];
1737
1738 /* The offset must always be a multiple of 4. We use
1739 the least significant bit to record whether we have
1740 already generated the necessary reloc. */
1741 if ((off & 1) != 0)
1742 off &= ~1;
1743 else
1744 {
1745 local_got_offsets[r_symndx] |= 1;
1746 do_got = 1;
1747 }
1748 }
1749
1750 if (do_got)
1751 {
1752 if (info->shared)
1753 {
1754 /* Output a dynamic relocation for this GOT entry.
1755 In this case it is relative to the base of the
1756 object because the symbol index is zero. */
1757 Elf_Internal_Rela outrel;
1758 bfd_byte *loc;
1759 asection *s = htab->srelgot;
1760
1761 outrel.r_offset = (off
1762 + htab->sgot->output_offset
1763 + htab->sgot->output_section->vma);
1764 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1765 outrel.r_addend = relocation;
1766 loc = s->contents;
1767 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1768 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1769 }
1770 else
1771 bfd_put_32 (output_bfd, relocation,
1772 htab->sgot->contents + off);
1773 }
1774
1775 if (off >= (bfd_vma) -2)
1776 abort ();
1777
1778 relocation = off - GOT_REG_OFFSET;
1779 }
1780 break;
1781 case R_METAG_TLS_GD:
1782 case R_METAG_TLS_IE:
1783 {
1784 /* XXXMJF There is room here for optimisations. For example
1785 converting from GD->IE, etc. */
1786 bfd_vma off;
1787 int indx;
1788 char tls_type;
1789
1790 if (htab->sgot == NULL)
1791 abort();
1792
1793 indx = 0;
1794 if (hh != NULL)
1795 {
1796 bfd_boolean dyn;
1797 dyn = htab->etab.dynamic_sections_created;
1798
1799 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, &hh->eh)
1800 && (!info->shared
1801 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1802 {
1803 indx = hh->eh.dynindx;
1804 }
1805 off = hh->eh.got.offset;
1806 tls_type = hh->tls_type;
1807 }
1808 else
1809 {
1810 /* Local symbol case. */
1811 if (local_got_offsets == NULL)
1812 abort ();
1813
1814 off = local_got_offsets[r_symndx];
1815 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1816 }
1817
1818 if (tls_type == GOT_UNKNOWN)
1819 abort();
1820
1821 if ((off & 1) != 0)
1822 off &= ~1;
1823 else
1824 {
1825 bfd_boolean need_relocs = FALSE;
1826 Elf_Internal_Rela outrel;
1827 bfd_byte *loc = NULL;
1828 int cur_off = off;
1829
1830 /* The GOT entries have not been initialized yet. Do it
1831 now, and emit any relocations. If both an IE GOT and a
1832 GD GOT are necessary, we emit the GD first. */
1833
1834 if ((info->shared || indx != 0)
1835 && (hh == NULL
1836 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1837 || hh->eh.root.type != bfd_link_hash_undefweak))
1838 {
1839 need_relocs = TRUE;
1840 loc = htab->srelgot->contents;
1841 /* FIXME (CAO): Should this be reloc_count++ ? */
1842 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
1843 }
1844
1845 if (tls_type & GOT_TLS_GD)
1846 {
1847 if (need_relocs)
1848 {
1849 outrel.r_offset = (cur_off
1850 + htab->sgot->output_section->vma
1851 + htab->sgot->output_offset);
1852 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1853 outrel.r_addend = 0;
1854 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
1855
1856 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1857 htab->srelgot->reloc_count++;
1858 loc += sizeof (Elf32_External_Rela);
1859
1860 if (indx == 0)
1861 bfd_put_32 (output_bfd, 0,
1862 htab->sgot->contents + cur_off + 4);
1863 else
1864 {
1865 bfd_put_32 (output_bfd, 0,
1866 htab->sgot->contents + cur_off + 4);
1867 outrel.r_info = ELF32_R_INFO (indx,
1868 R_METAG_TLS_DTPOFF);
1869 outrel.r_offset += 4;
1870 bfd_elf32_swap_reloca_out (output_bfd,
1871 &outrel, loc);
1872 htab->srelgot->reloc_count++;
1873 loc += sizeof (Elf32_External_Rela);
1874 }
1875 }
1876 else
1877 {
1878 /* We don't support changing the TLS model. */
1879 abort ();
1880 }
1881
1882 cur_off += 8;
1883 }
1884
1885 if (tls_type & GOT_TLS_IE)
1886 {
1887 if (need_relocs)
1888 {
1889 outrel.r_offset = (cur_off
1890 + htab->sgot->output_section->vma
1891 + htab->sgot->output_offset);
1892 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1893
1894 if (indx == 0)
1895 outrel.r_addend = relocation - dtpoff_base (info);
1896 else
1897 outrel.r_addend = 0;
1898
1899 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1900 htab->srelgot->reloc_count++;
1901 loc += sizeof (Elf32_External_Rela);
1902 }
1903 else
1904 bfd_put_32 (output_bfd, tpoff (info, relocation),
1905 htab->sgot->contents + cur_off);
1906
1907 cur_off += 4;
1908 }
1909
1910 if (hh != NULL)
1911 hh->eh.got.offset |= 1;
1912 else
1913 local_got_offsets[r_symndx] |= 1;
1914 }
1915
1916 /* Add the base of the GOT to the relocation value. */
1917 relocation = off - GOT_REG_OFFSET;
1918
1919 break;
1920 }
1921
1922 case R_METAG_TLS_IENONPIC_HI16:
1923 case R_METAG_TLS_IENONPIC_LO16:
1924 case R_METAG_TLS_LE_HI16:
1925 case R_METAG_TLS_LE_LO16:
1926 if (info->shared)
1927 {
1928 (*_bfd_error_handler)
1929 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1930 input_bfd, input_section,
1931 (long) rel->r_offset, howto->name);
1932 return FALSE;
1933 }
1934 else
1935 relocation = tpoff (info, relocation);
1936 break;
1937 case R_METAG_TLS_LDO_HI16:
1938 case R_METAG_TLS_LDO_LO16:
1939 if (! info->shared)
1940 relocation = tpoff (info, relocation);
1941 else
1942 relocation -= dtpoff_base (info);
1943 break;
1944 case R_METAG_TLS_LDM:
1945 {
1946 bfd_vma off;
1947
1948 if (htab->sgot == NULL)
1949 abort();
1950 off = htab->tls_ldm_got.offset;
1951 if (off & 1)
1952 off &= ~1;
1953 else
1954 {
1955 Elf_Internal_Rela outrel;
1956 bfd_byte *loc;
1957
1958 outrel.r_offset = (off
1959 + htab->sgot->output_section->vma
1960 + htab->sgot->output_offset);
1961
1962 outrel.r_addend = 0;
1963 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1964 loc = htab->srelgot->contents;
1965 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1966 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1967 htab->tls_ldm_got.offset |= 1;
1968 }
1969
1970 relocation = off - GOT_REG_OFFSET;
1971 break;
1972 }
1973 default:
1974 break;
1975 }
1976
1977 r = metag_final_link_relocate (howto, input_bfd, input_section,
1978 contents, rel, relocation, hh, htab,
1979 sec);
1980
1981 if (r != bfd_reloc_ok)
1982 {
1983 const char * msg = (const char *) NULL;
1984
1985 switch (r)
1986 {
1987 case bfd_reloc_overflow:
1988 r = info->callbacks->reloc_overflow
1989 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1990 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1991 break;
1992
1993 case bfd_reloc_undefined:
1994 r = info->callbacks->undefined_symbol
1995 (info, name, input_bfd, input_section, rel->r_offset,
1996 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 r = info->callbacks->warning
2018 (info, msg, name, input_bfd, input_section, rel->r_offset);
2019
2020 if (! r)
2021 return FALSE;
2022 }
2023 }
2024
2025 return TRUE;
2026}
2027
2028/* Create the .plt and .got sections, and set up our hash table
2029 short-cuts to various dynamic sections. */
2030
2031static bfd_boolean
2032elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2033{
2034 struct elf_metag_link_hash_table *htab;
2035 struct elf_link_hash_entry *eh;
2036 struct bfd_link_hash_entry *bh;
2037 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2038
2039 /* Don't try to create the .plt and .got twice. */
2040 htab = metag_link_hash_table (info);
2041 if (htab->splt != NULL)
2042 return TRUE;
2043
2044 /* Call the generic code to do most of the work. */
2045 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2046 return FALSE;
2047
ad1fc92a 2048 htab->sgot = bfd_get_linker_section (abfd, ".got");
a3c62988
NC		 2049 if (! htab->sgot)
2050 return FALSE;
2051
2052 htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt",
2053 (SEC_ALLOC | SEC_LOAD |
2054 SEC_HAS_CONTENTS |
2055 SEC_IN_MEMORY |
2056 SEC_LINKER_CREATED));
2057 if (htab->sgotplt == NULL
2058 || !bfd_set_section_alignment (abfd, htab->sgotplt, 2))
2059 return FALSE;
2060
2061 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2062 section. We don't do this in the linker script because we don't want
2063 to define the symbol if we are not creating a global offset table. */
2064 bh = NULL;
2065 if (!(_bfd_generic_link_add_one_symbol
2066 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot,
2067 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2068 return FALSE;
2069 eh = (struct elf_link_hash_entry *) bh;
2070 eh->def_regular = 1;
2071 eh->type = STT_OBJECT;
2072 eh->other = STV_HIDDEN;
2073
2074 if (! info->executable
2075 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2076 return FALSE;
2077
2078 elf_hash_table (info)->hgot = eh;
2079
ad1fc92a
NC		 2080 htab->splt = bfd_get_linker_section (abfd, ".plt");
2081 htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt");
a3c62988 2082
ad1fc92a 2083 htab->srelgot = bfd_get_linker_section (abfd, ".rela.got");
a3c62988 2084
ad1fc92a
NC		 2085 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
2086 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
a3c62988
NC		 2087
2088 return TRUE;
2089}
2090
2091/* Look through the relocs for a section during the first phase, and
2092 calculate needed space in the global offset table, procedure linkage
2093 table, and dynamic reloc sections. At this point we haven't
2094 necessarily read all the input files. */
2095
2096static bfd_boolean
2097elf_metag_check_relocs (bfd *abfd,
2098 struct bfd_link_info *info,
2099 asection *sec,
2100 const Elf_Internal_Rela *relocs)
2101{
2102 Elf_Internal_Shdr *symtab_hdr;
2103 struct elf_link_hash_entry **eh_syms;
2104 const Elf_Internal_Rela *rel;
2105 const Elf_Internal_Rela *rel_end;
2106 struct elf_metag_link_hash_table *htab;
2107 asection *sreloc;
2108 bfd *dynobj;
2109 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2110
2111 if (info->relocatable)
2112 return TRUE;
2113
2114 htab = metag_link_hash_table (info);
2115 dynobj = htab->etab.dynobj;
2116 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2117 eh_syms = elf_sym_hashes (abfd);
2118 sreloc = NULL;
2119
2120 if (htab == NULL)
2121 return FALSE;
2122
2123 rel_end = relocs + sec->reloc_count;
2124 for (rel = relocs; rel < rel_end; rel++)
2125 {
2126 int r_type;
2127 struct elf_metag_link_hash_entry *hh;
1a18f0ae 2128 Elf_Internal_Sym *isym;
a3c62988
NC		 2129 unsigned long r_symndx;
2130
2131 r_symndx = ELF32_R_SYM (rel->r_info);
2132 r_type = ELF32_R_TYPE (rel->r_info);
2133 if (r_symndx < symtab_hdr->sh_info)
1a18f0ae
NC		 2134 {
2135 /* A local symbol. */
2136 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2137 abfd, r_symndx);
2138 if (isym == NULL)
2139 return FALSE;
2140
2141 hh = NULL;
2142 }
a3c62988
NC		 2143 else
2144 {
1a18f0ae
NC		 2145 isym = NULL;
2146
a3c62988
NC		 2147 hh = (struct elf_metag_link_hash_entry *)
2148 eh_syms[r_symndx - symtab_hdr->sh_info];
2149 while (hh->eh.root.type == bfd_link_hash_indirect
2150 || hh->eh.root.type == bfd_link_hash_warning)
2151 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
81fbe831
AM		 2152
2153 /* PR15323, ref flags aren't set for references in the same
2154 object. */
2155 hh->eh.root.non_ir_ref = 1;
a3c62988
NC		 2156 }
2157
2158 /* Some relocs require a global offset table. */
2159 if (htab->sgot == NULL)
2160 {
2161 switch (r_type)
2162 {
2163 case R_METAG_TLS_GD:
2164 case R_METAG_TLS_LDM:
2165 case R_METAG_TLS_IE:
2166 if (info->shared)
2167 info->flags |= DF_STATIC_TLS;
2168 /* Fall through. */
2169
2170 case R_METAG_HI16_GOTOFF:
2171 case R_METAG_LO16_GOTOFF:
2172 case R_METAG_GETSET_GOTOFF:
2173 case R_METAG_GETSET_GOT:
2174 case R_METAG_HI16_GOTPC:
2175 case R_METAG_LO16_GOTPC:
2176 if (dynobj == NULL)
2177 htab->etab.dynobj = dynobj = abfd;
2178 if (!elf_metag_create_dynamic_sections (dynobj, info))
2179 return FALSE;
2180 break;
2181
2182 default:
2183 break;
2184 }
2185 }
2186
2187 switch (r_type)
2188 {
2189 case R_METAG_TLS_IE:
2190 case R_METAG_TLS_GD:
2191 case R_METAG_GETSET_GOT:
2192 switch (r_type)
2193 {
2194 default:
2195 tls_type = GOT_NORMAL;
2196 break;
2197 case R_METAG_TLS_IE:
2198 tls_type = GOT_TLS_IE;
2199 break;
2200 case R_METAG_TLS_GD:
2201 tls_type = GOT_TLS_GD;
2202 break;
2203 }
2204
2205 if (hh != NULL)
2206 {
2207 hh->eh.got.refcount += 1;
2208 old_tls_type = hh->tls_type;
2209 }
2210 else
2211 {
2212 bfd_signed_vma *local_got_refcounts;
2213
2214 /* This is a global offset table entry for a local
2215 symbol. */
2216 local_got_refcounts = elf_local_got_refcounts (abfd);
2217 if (local_got_refcounts == NULL)
2218 {
2219 bfd_size_type size;
2220
2221 size = symtab_hdr->sh_info;
2222 size *= sizeof (bfd_signed_vma);
2223 /* Add in space to store the local GOT TLS types. */
2224 size += symtab_hdr->sh_info;
2225 local_got_refcounts = ((bfd_signed_vma *)
2226 bfd_zalloc (abfd, size));
2227 if (local_got_refcounts == NULL)
2228 return FALSE;
2229 elf_local_got_refcounts (abfd) = local_got_refcounts;
2230 memset (metag_elf_local_got_tls_type (abfd),
2231 GOT_UNKNOWN, symtab_hdr->sh_info);
2232 }
2233 local_got_refcounts[r_symndx] += 1;
2234 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2235 }
2236
2237 if (old_tls_type != tls_type)
2238 {
2239 if (hh != NULL)
2240 {
2241 hh->tls_type = tls_type;
2242 }
2243 else
2244 {
2245 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2246 }
2247 }
2248
2249 break;
2250
2251 case R_METAG_TLS_LDM:
2252 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2253 break;
2254
2255 case R_METAG_RELBRANCH_PLT:
2256 /* This symbol requires a procedure linkage table entry. We
2257 actually build the entry in adjust_dynamic_symbol,
2258 because this might be a case of linking PIC code without
2259 linking in any dynamic objects, in which case we don't
2260 need to generate a procedure linkage table after all. */
2261
2262 /* If this is a local symbol, we resolve it directly without
2263 creating a procedure linkage table entry. */
2264 if (hh == NULL)
2265 continue;
2266
2267 if (hh->eh.forced_local)
2268 break;
2269
2270 hh->eh.needs_plt = 1;
2271 hh->eh.plt.refcount += 1;
2272 break;
2273
a3c62988
NC		 2274 case R_METAG_HIADDR16:
2275 case R_METAG_LOADDR16:
1a18f0ae
NC		 2276 /* Let's help debug shared library creation. These relocs
2277 cannot be used in shared libs. Don't error out for
2278 sections we don't care about, such as debug sections or
2279 non-constant sections. */
2280 if (info->shared
2281 && (sec->flags & SEC_ALLOC) != 0
2282 && (sec->flags & SEC_READONLY) != 0)
2283 {
2284 const char *name;
2285
2286 if (hh)
2287 name = hh->eh.root.root.string;
2288 else
2289 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2290 (*_bfd_error_handler)
2291 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2292 abfd, elf_metag_howto_table[r_type].name, name);
2293 bfd_set_error (bfd_error_bad_value);
2294 return FALSE;
2295 }
2296
2297 /* Fall through. */
2298 case R_METAG_ADDR32:
a3c62988
NC		 2299 case R_METAG_RELBRANCH:
2300 case R_METAG_GETSETOFF:
2301 if (hh != NULL && !info->shared)
2302 {
2303 hh->eh.non_got_ref = 1;
2304 hh->eh.plt.refcount += 1;
2305 }
2306
2307 /* If we are creating a shared library, and this is a reloc
2308 against a global symbol, or a non PC relative reloc
2309 against a local symbol, then we need to copy the reloc
2310 into the shared library. However, if we are linking with
2311 -Bsymbolic, we do not need to copy a reloc against a
2312 global symbol which is defined in an object we are
2313 including in the link (i.e., DEF_REGULAR is set). At
2314 this point we have not seen all the input files, so it is
2315 possible that DEF_REGULAR is not set now but will be set
2316 later (it is never cleared). We account for that
2317 possibility below by storing information in the
2318 dyn_relocs field of the hash table entry. A similar
2319 situation occurs when creating shared libraries and symbol
2320 visibility changes render the symbol local.
2321
2322 If on the other hand, we are creating an executable, we
2323 may need to keep relocations for symbols satisfied by a
2324 dynamic library if we manage to avoid copy relocs for the
2325 symbol. */
2326 if ((info->shared
2327 && (sec->flags & SEC_ALLOC) != 0
2328 && (r_type != R_METAG_RELBRANCH
2329 || (hh != NULL
2330 && (! info->symbolic
2331 || hh->eh.root.type == bfd_link_hash_defweak
2332 || !hh->eh.def_regular))))
2333 || (!info->shared
2334 && (sec->flags & SEC_ALLOC) != 0
2335 && hh != NULL
2336 && (hh->eh.root.type == bfd_link_hash_defweak
2337 || !hh->eh.def_regular)))
2338 {
2339 struct elf_metag_dyn_reloc_entry *hdh_p;
2340 struct elf_metag_dyn_reloc_entry **hdh_head;
2341
2342 if (dynobj == NULL)
2343 htab->etab.dynobj = dynobj = abfd;
2344
2345 /* When creating a shared object, we must copy these
2346 relocs into the output file. We create a reloc
2347 section in dynobj and make room for the reloc. */
2348 if (sreloc == NULL)
2349 {
2350 sreloc = _bfd_elf_make_dynamic_reloc_section
2351 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2352
2353 if (sreloc == NULL)
2354 {
2355 bfd_set_error (bfd_error_bad_value);
2356 return FALSE;
2357 }
2358
2359 elf_section_data (sec)->sreloc = sreloc;
2360 }
2361
2362 /* If this is a global symbol, we count the number of
2363 relocations we need for this symbol. */
2364 if (hh != NULL)
2365 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2366 else
2367 {
2368 /* Track dynamic relocs needed for local syms too. */
2369 asection *sr;
2370 void *vpp;
a3c62988
NC		 2371
2372 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2373 if (sr == NULL)
2374 sr = sec;
2375
2376 vpp = &elf_section_data (sr)->local_dynrel;
2377 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2378 }
2379
2380 hdh_p = *hdh_head;
2381 if (hdh_p == NULL || hdh_p->sec != sec)
2382 {
2383 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2384 bfd_alloc (dynobj, sizeof *hdh_p));
2385 if (hdh_p == NULL)
2386 return FALSE;
2387 hdh_p->hdh_next = *hdh_head;
2388 *hdh_head = hdh_p;
2389 hdh_p->sec = sec;
2390 hdh_p->count = 0;
2391 hdh_p->relative_count = 0;
2392 }
2393
2394 hdh_p->count += 1;
2395 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2396 hdh_p->relative_count += 1;
2397 }
2398 break;
2399
2400 /* This relocation describes the C++ object vtable hierarchy.
2401 Reconstruct it for later use during GC. */
2402 case R_METAG_GNU_VTINHERIT:
2403 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2404 rel->r_offset))
2405 return FALSE;
2406 break;
2407
2408 /* This relocation describes which C++ vtable entries are actually
2409 used. Record for later use during GC. */
2410 case R_METAG_GNU_VTENTRY:
2411 BFD_ASSERT (hh != NULL);
2412 if (hh != NULL
2413 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2414 return FALSE;
2415 break;
2416 }
2417 }
2418
2419 return TRUE;
2420}
2421
2422/* Copy the extra info we tack onto an elf_link_hash_entry. */
2423
2424static void
2425elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2426 struct elf_link_hash_entry *eh_dir,
2427 struct elf_link_hash_entry *eh_ind)
2428{
2429 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2430
2431 hh_dir = metag_elf_hash_entry (eh_dir);
2432 hh_ind = metag_elf_hash_entry (eh_ind);
2433
2434 if (hh_ind->dyn_relocs != NULL)
2435 {
2436 if (hh_dir->dyn_relocs != NULL)
2437 {
2438 struct elf_metag_dyn_reloc_entry **hdh_pp;
2439 struct elf_metag_dyn_reloc_entry *hdh_p;
2440
2441 if (eh_ind->root.type == bfd_link_hash_indirect)
2442 abort ();
2443
2444 /* Add reloc counts against the weak sym to the strong sym
2445 list. Merge any entries against the same section. */
2446 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2447 {
2448 struct elf_metag_dyn_reloc_entry *hdh_q;
2449
2450 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2451 hdh_q = hdh_q->hdh_next)
2452 if (hdh_q->sec == hdh_p->sec)
2453 {
2454 hdh_q->relative_count += hdh_p->relative_count;
2455 hdh_q->count += hdh_p->count;
2456 *hdh_pp = hdh_p->hdh_next;
2457 break;
2458 }
2459 if (hdh_q == NULL)
2460 hdh_pp = &hdh_p->hdh_next;
2461 }
2462 *hdh_pp = hh_dir->dyn_relocs;
2463 }
2464
2465 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2466 hh_ind->dyn_relocs = NULL;
2467 }
2468
2469 if (eh_ind->root.type == bfd_link_hash_indirect
2470 && eh_dir->got.refcount <= 0)
2471 {
2472 hh_dir->tls_type = hh_ind->tls_type;
2473 hh_ind->tls_type = GOT_UNKNOWN;
2474 }
2475
2476 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2477}
2478
2479/* Adjust a symbol defined by a dynamic object and referenced by a
2480 regular object. The current definition is in some section of the
2481 dynamic object, but we're not including those sections. We have to
2482 change the definition to something the rest of the link can
2483 understand. */
2484
2485static bfd_boolean
2486elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2487 struct elf_link_hash_entry *eh)
2488{
2489 struct elf_metag_link_hash_table *htab;
2490 struct elf_metag_link_hash_entry *hh;
2491 struct elf_metag_dyn_reloc_entry *hdh_p;
2492 asection *s;
2493
2494 /* If this is a function, put it in the procedure linkage table. We
2495 will fill in the contents of the procedure linkage table later,
2496 when we know the address of the .got section. */
2497 if (eh->type == STT_FUNC
2498 || eh->needs_plt)
2499 {
2500 if (eh->plt.refcount <= 0
2501 || SYMBOL_CALLS_LOCAL (info, eh)
2502 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2503 && eh->root.type == bfd_link_hash_undefweak))
2504 {
2505 /* This case can occur if we saw a PLT reloc in an input
2506 file, but the symbol was never referred to by a dynamic
2507 object. In such a case, we don't actually need to build
2508 a procedure linkage table, and we can just do a PCREL
2509 reloc instead. */
2510 eh->plt.offset = (bfd_vma) -1;
2511 eh->needs_plt = 0;
2512 }
2513
2514 return TRUE;
2515 }
2516 else
2517 eh->plt.offset = (bfd_vma) -1;
2518
2519 /* If this is a weak symbol, and there is a real definition, the
2520 processor independent code will have arranged for us to see the
2521 real definition first, and we can just use the same value. */
2522 if (eh->u.weakdef != NULL)
2523 {
2524 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2525 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2526 abort ();
2527 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2528 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2529 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2530 return TRUE;
2531 }
2532
2533 /* This is a reference to a symbol defined by a dynamic object which
2534 is not a function. */
2535
2536 /* If we are creating a shared library, we must presume that the
2537 only references to the symbol are via the global offset table.
2538 For such cases we need not do anything here; the relocations will
2539 be handled correctly by relocate_section. */
2540 if (info->shared)
2541 return TRUE;
2542
2543 /* If there are no references to this symbol that do not use the
2544 GOT, we don't need to generate a copy reloc. */
2545 if (!eh->non_got_ref)
2546 return TRUE;
2547
2548 /* If -z nocopyreloc was given, we won't generate them either. */
2549 if (info->nocopyreloc)
2550 {
2551 eh->non_got_ref = 0;
2552 return TRUE;
2553 }
2554
2555 hh = (struct elf_metag_link_hash_entry *) eh;
2556 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2557 {
2558 s = hdh_p->sec->output_section;
2559 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2560 break;
2561 }
2562
2563 /* If we didn't find any dynamic relocs in read-only sections, then
2564 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2565 if (hdh_p == NULL)
2566 {
2567 eh->non_got_ref = 0;
2568 return TRUE;
2569 }
2570
a3c62988
NC		 2571 /* We must allocate the symbol in our .dynbss section, which will
2572 become part of the .bss section of the executable. There will be
2573 an entry for this symbol in the .dynsym section. The dynamic
2574 object will contain position independent code, so all references
2575 from the dynamic object to this symbol will go through the global
2576 offset table. The dynamic linker will use the .dynsym entry to
2577 determine the address it must put in the global offset table, so
2578 both the dynamic object and the regular object will refer to the
2579 same memory location for the variable. */
2580
2581 htab = metag_link_hash_table (info);
2582
2583 /* We must generate a COPY reloc to tell the dynamic linker to
2584 copy the initial value out of the dynamic object and into the
2585 runtime process image. */
34c67f14 2586 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
a3c62988
NC		 2587 {
2588 htab->srelbss->size += sizeof (Elf32_External_Rela);
2589 eh->needs_copy = 1;
2590 }
2591
2592 s = htab->sdynbss;
2593
6cabe1ea 2594 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
a3c62988
NC		 2595}
2596
2597/* Allocate space in .plt, .got and associated reloc sections for
2598 global syms. */
2599
2600static bfd_boolean
2601allocate_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, info->shared, eh))
2630 {
2631 asection *s = htab->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 (! info->shared
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->sgotplt->size += 4;
2658
2659 /* We also need to make an entry in the .rel.plt section. */
2660 htab->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->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->srelgot->size += sizeof (Elf32_External_Rela);
2702 else if (tls_type == GOT_TLS_GD)
2703 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2704 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, eh))
2705 htab->srelgot->size += sizeof (Elf32_External_Rela);
2706 }
2707 else
2708 eh->got.offset = (bfd_vma) -1;
2709
2710 hh = (struct elf_metag_link_hash_entry *) eh;
2711 if (hh->dyn_relocs == NULL)
2712 return TRUE;
2713
2714 /* If this is a -Bsymbolic shared link, then we need to discard all
2715 space allocated for dynamic pc-relative relocs against symbols
2716 defined in a regular object. For the normal shared case, discard
2717 space for relocs that have become local due to symbol visibility
2718 changes. */
2719 if (info->shared)
2720 {
2721 if (SYMBOL_CALLS_LOCAL (info, eh))
2722 {
2723 struct elf_metag_dyn_reloc_entry **hdh_pp;
2724
2725 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2726 {
2727 hdh_p->count -= hdh_p->relative_count;
2728 hdh_p->relative_count = 0;
2729 if (hdh_p->count == 0)
2730 *hdh_pp = hdh_p->hdh_next;
2731 else
2732 hdh_pp = &hdh_p->hdh_next;
2733 }
2734 }
2735
2736 /* Also discard relocs on undefined weak syms with non-default
2737 visibility. */
2738 if (hh->dyn_relocs != NULL
2739 && eh->root.type == bfd_link_hash_undefweak)
2740 {
2741 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2742 hh->dyn_relocs = NULL;
2743
2744 /* Make sure undefined weak symbols are output as a dynamic
2745 symbol in PIEs. */
2746 else if (eh->dynindx == -1
2747 && !eh->forced_local)
2748 {
2749 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2750 return FALSE;
2751 }
2752 }
2753 }
2754 else
2755 {
2756 /* For the non-shared case, discard space for relocs against
2757 symbols which turn out to need copy relocs or are not
2758 dynamic. */
2759 if (!eh->non_got_ref
2760 && ((eh->def_dynamic
2761 && !eh->def_regular)
2762 || (htab->etab.dynamic_sections_created
2763 && (eh->root.type == bfd_link_hash_undefweak
2764 || eh->root.type == bfd_link_hash_undefined))))
2765 {
2766 /* Make sure this symbol is output as a dynamic symbol.
2767 Undefined weak syms won't yet be marked as dynamic. */
2768 if (eh->dynindx == -1
2769 && !eh->forced_local)
2770 {
2771 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2772 return FALSE;
2773 }
2774
2775 /* If that succeeded, we know we'll be keeping all the
2776 relocs. */
2777 if (eh->dynindx != -1)
2778 goto keep;
2779 }
2780
2781 hh->dyn_relocs = NULL;
2782 return TRUE;
2783
2784 keep: ;
2785 }
2786
2787 /* Finally, allocate space. */
2788 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2789 {
2790 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2791 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2792 }
2793
2794 return TRUE;
2795}
2796
2797/* Find any dynamic relocs that apply to read-only sections. */
2798
2799static bfd_boolean
2800readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2801{
2802 struct elf_metag_link_hash_entry *hh;
2803 struct elf_metag_dyn_reloc_entry *hdh_p;
2804
2805 if (eh->root.type == bfd_link_hash_warning)
2806 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2807
2808 hh = (struct elf_metag_link_hash_entry *) eh;
2809 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2810 {
2811 asection *s = hdh_p->sec->output_section;
2812
2813 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2814 {
2815 struct bfd_link_info *info = inf;
2816
2817 info->flags |= DF_TEXTREL;
2818
2819 /* Not an error, just cut short the traversal. */
2820 return FALSE;
2821 }
2822 }
2823 return TRUE;
2824}
2825
2826/* Set the sizes of the dynamic sections. */
2827
2828static bfd_boolean
2829elf_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 (info->executable)
2847 {
ad1fc92a 2848 s = bfd_get_linker_section (dynobj, ".interp");
a3c62988
NC		 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. */
c72f2fb2 2858 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
a3c62988
NC		 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->sgot;
2906 srel = htab->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 (info->shared)
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->sgot->size;
2930 htab->sgot->size += 8;
2931 htab->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->splt
2951 || s == htab->sgot
2952 || s == htab->sgotplt
2953 || s == htab->sdynbss)
2954 {
2955 /* Strip this section if we don't need it; see the
2956 comment below. */
2957 }
2958 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2959 {
2960 if (s->size != 0 && s != htab->srelplt)
2961 relocs = TRUE;
2962
2963 /* We use the reloc_count field as a counter if we need
2964 to copy relocs into the output file. */
2965 s->reloc_count = 0;
2966 reloc_section = TRUE;
2967 }
2968 else
2969 {
2970 /* It's not one of our sections, so don't allocate space. */
2971 continue;
2972 }
2973
2974 if (s->size == 0)
2975 {
2976 /* If we don't need this section, strip it from the
2977 output file. This is mostly to handle .rela.bss and
2978 .rela.plt. We must create both sections in
2979 create_dynamic_sections, because they must be created
2980 before the linker maps input sections to output
2981 sections. The linker does that before
2982 adjust_dynamic_symbol is called, and it is that
2983 function which decides whether anything needs to go
2984 into these sections. */
2985 s->flags |= SEC_EXCLUDE;
2986 continue;
2987 }
2988
2989 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2990 continue;
2991
2992 /* Allocate memory for the section contents. */
2993 s->contents = bfd_zalloc (dynobj, s->size);
2994 if (s->contents == NULL)
2995 return FALSE;
2996 else if (reloc_section)
2997 {
2998 unsigned char *contents = s->contents;
2999 Elf32_External_Rela reloc;
3000
3001 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3002 memset(&reloc, 0, sizeof(Elf32_External_Rela));
3003 reloc.r_info[0] = R_METAG_NONE;
3004 for (; contents < (s->contents + s->size);
3005 contents += sizeof(Elf32_External_Rela))
3006 {
3007 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3008 }
3009 }
3010 }
3011
3012 if (htab->etab.dynamic_sections_created)
3013 {
3014 /* Add some entries to the .dynamic section. We fill in the
3015 values later, in elf_metag_finish_dynamic_sections, but we
3016 must add the entries now so that we get the correct size for
3017 the .dynamic section. The DT_DEBUG entry is filled in by the
3018 dynamic linker and used by the debugger. */
3019#define add_dynamic_entry(TAG, VAL) \
3020 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3021
3022 if (!add_dynamic_entry (DT_PLTGOT, 0))
3023 return FALSE;
3024
3025 if (info->executable)
3026 {
3027 if (!add_dynamic_entry (DT_DEBUG, 0))
3028 return FALSE;
3029 }
3030
3031 if (htab->srelplt->size != 0)
3032 {
3033 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3034 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3035 || !add_dynamic_entry (DT_JMPREL, 0))
3036 return FALSE;
3037 }
3038
3039 if (relocs)
3040 {
3041 if (!add_dynamic_entry (DT_RELA, 0)
3042 || !add_dynamic_entry (DT_RELASZ, 0)
3043 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3044 return FALSE;
3045
3046 /* If any dynamic relocs apply to a read-only section,
3047 then we need a DT_TEXTREL entry. */
3048 if ((info->flags & DF_TEXTREL) == 0)
3049 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3050
3051 if ((info->flags & DF_TEXTREL) != 0)
3052 {
3053 if (!add_dynamic_entry (DT_TEXTREL, 0))
3054 return FALSE;
3055 }
3056 }
3057 }
3058#undef add_dynamic_entry
3059
3060 return TRUE;
3061}
3062
3063/* Finish up dynamic symbol handling. We set the contents of various
3064 dynamic sections here. */
3065
3066static bfd_boolean
3067elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3068 struct bfd_link_info *info,
3069 struct elf_link_hash_entry *eh,
3070 Elf_Internal_Sym *sym)
3071{
3072 struct elf_metag_link_hash_table *htab;
3073 Elf_Internal_Rela rel;
3074 bfd_byte *loc;
3075
3076 htab = metag_link_hash_table (info);
3077
3078 if (eh->plt.offset != (bfd_vma) -1)
3079 {
3080 asection *splt;
3081 asection *sgot;
3082 asection *srela;
3083
3084 bfd_vma plt_index;
3085 bfd_vma got_offset;
3086 bfd_vma got_entry;
3087
3088 if (eh->plt.offset & 1)
3089 abort ();
3090
3091 BFD_ASSERT (eh->dynindx != -1);
3092
3093 splt = htab->splt;
3094 sgot = htab->sgotplt;
3095 srela = htab->srelplt;
3096 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3097
3098 /* Get the index in the procedure linkage table which
3099 corresponds to this symbol. This is the index of this symbol
3100 in all the symbols for which we are making plt entries. The
3101 first entry in the procedure linkage table is reserved. */
3102 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3103
3104 /* Get the offset into the .got.plt table of the entry that
3105 corresponds to this function. */
3106 got_offset = plt_index * GOT_ENTRY_SIZE;
3107
3108 BFD_ASSERT (got_offset < (1 << 16));
3109
3110 got_entry = sgot->output_section->vma
3111 + sgot->output_offset
3112 + got_offset;
3113
3114 BFD_ASSERT (plt_index < (1 << 16));
3115
3116 /* Fill in the entry in the procedure linkage table. */
3117 if (! info->shared)
3118 {
3119 bfd_put_32 (output_bfd,
3120 (plt_entry[0]
3121 | (((got_entry >> 16) & 0xffff) << 3)),
3122 splt->contents + eh->plt.offset);
3123 bfd_put_32 (output_bfd,
3124 (plt_entry[1]
3125 | ((got_entry & 0xffff) << 3)),
3126 splt->contents + eh->plt.offset + 4);
3127 bfd_put_32 (output_bfd, plt_entry[2],
3128 splt->contents + eh->plt.offset + 8);
3129 bfd_put_32 (output_bfd,
3130 (plt_entry[3] | (plt_index << 3)),
3131 splt->contents + eh->plt.offset + 12);
3132 bfd_put_32 (output_bfd,
3133 (plt_entry[4]
3134 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3135 splt->contents + eh->plt.offset + 16);
3136 }
3137 else
3138 {
3139 bfd_vma addr = got_entry - (splt->output_section->vma +
3140 splt->output_offset + eh->plt.offset);
3141
3142 bfd_put_32 (output_bfd,
3143 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3144 splt->contents + eh->plt.offset);
3145 bfd_put_32 (output_bfd,
3146 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3147 splt->contents + eh->plt.offset + 4);
3148 bfd_put_32 (output_bfd, plt_pic_entry[2],
3149 splt->contents + eh->plt.offset + 8);
3150 bfd_put_32 (output_bfd,
3151 (plt_pic_entry[3] | (plt_index << 3)),
3152 splt->contents + eh->plt.offset + 12);
3153 bfd_put_32 (output_bfd,
3154 (plt_pic_entry[4]
3155 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3156 splt->contents + eh->plt.offset + 16);
3157 }
3158
3159 /* Fill in the entry in the global offset table. */
3160 bfd_put_32 (output_bfd,
3161 (splt->output_section->vma
3162 + splt->output_offset
3163 + eh->plt.offset
3164 + 12), /* offset within PLT entry */
3165 sgot->contents + got_offset);
3166
3167 /* Fill in the entry in the .rela.plt section. */
3168 rel.r_offset = (sgot->output_section->vma
3169 + sgot->output_offset
3170 + got_offset);
3171 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3172 rel.r_addend = 0;
3173 loc = htab->srelplt->contents;
3174 loc += plt_index * sizeof(Elf32_External_Rela);
3175 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3176
3177 if (!eh->def_regular)
3178 {
3179 /* Mark the symbol as undefined, rather than as defined in
3180 the .plt section. Leave the value alone. */
3181 sym->st_shndx = SHN_UNDEF;
3182 }
3183 }
3184
3185 if (eh->got.offset != (bfd_vma) -1
3186 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3187 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3188 {
3189 /* This symbol has an entry in the global offset table. Set it
3190 up. */
3191
3192 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3193 + htab->sgot->output_offset
3194 + htab->sgot->output_section->vma);
3195
3196 /* If this is a -Bsymbolic link and the symbol is defined
3197 locally or was forced to be local because of a version file,
3198 we just want to emit a RELATIVE reloc. The entry in the
3199 global offset table will already have been initialized in the
3200 relocate_section function. */
3201 if (info->shared
3202 && (info->symbolic || eh->dynindx == -1)
3203 && eh->def_regular)
3204 {
3205 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3206 rel.r_addend = (eh->root.u.def.value
3207 + eh->root.u.def.section->output_offset
3208 + eh->root.u.def.section->output_section->vma);
3209 }
3210 else
3211 {
3212 if ((eh->got.offset & 1) != 0)
3213 abort ();
3214 bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset);
3215 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3216 rel.r_addend = 0;
3217 }
3218
3219 loc = htab->srelgot->contents;
3220 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3221 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3222 }
3223
3224 if (eh->needs_copy)
3225 {
3226 asection *s;
3227
3228 /* This symbol needs a copy reloc. Set it up. */
3229
3230 if (! (eh->dynindx != -1
3231 && (eh->root.type == bfd_link_hash_defined
3232 || eh->root.type == bfd_link_hash_defweak)))
3233 abort ();
3234
3235 s = htab->srelbss;
3236
3237 rel.r_offset = (eh->root.u.def.value
3238 + eh->root.u.def.section->output_offset
3239 + eh->root.u.def.section->output_section->vma);
3240 rel.r_addend = 0;
3241 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3242 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3243 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3244 }
3245
3246 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3247 if (eh->root.root.string[0] == '_'
3248 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3249 || eh == htab->etab.hgot))
3250 {
3251 sym->st_shndx = SHN_ABS;
3252 }
3253
3254 return TRUE;
3255}
3256
3257/* Set the Meta ELF ABI version. */
3258
3259static void
df3ce959 3260elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
a3c62988
NC		 3261{
3262 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3263
df3ce959 3264 _bfd_elf_post_process_headers (abfd, link_info);
a3c62988
NC		 3265 i_ehdrp = elf_elfheader (abfd);
3266 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3267}
3268
3269/* Used to decide how to sort relocs in an optimal manner for the
3270 dynamic linker, before writing them out. */
3271
3272static enum elf_reloc_type_class
7e612e98
AM		 3273elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3274 const asection *rel_sec ATTRIBUTE_UNUSED,
3275 const Elf_Internal_Rela *rela)
a3c62988
NC		 3276{
3277 switch ((int) ELF32_R_TYPE (rela->r_info))
3278 {
3279 case R_METAG_RELATIVE:
3280 return reloc_class_relative;
3281 case R_METAG_JMP_SLOT:
3282 return reloc_class_plt;
3283 case R_METAG_COPY:
3284 return reloc_class_copy;
3285 default:
3286 return reloc_class_normal;
3287 }
3288}
3289
3290/* Finish up the dynamic sections. */
3291
3292static bfd_boolean
3293elf_metag_finish_dynamic_sections (bfd *output_bfd,
3294 struct bfd_link_info *info)
3295{
3296 bfd *dynobj;
3297 struct elf_metag_link_hash_table *htab;
3298 asection *sdyn;
3299
3300 htab = metag_link_hash_table (info);
3301 dynobj = htab->etab.dynobj;
3302
ad1fc92a 3303 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
a3c62988
NC		 3304
3305 if (htab->etab.dynamic_sections_created)
3306 {
3307 asection *splt;
3308 Elf32_External_Dyn *dyncon, *dynconend;
3309
3310 if (sdyn == NULL)
3311 abort ();
3312
3313 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3314 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3315 for (; dyncon < dynconend; dyncon++)
3316 {
3317 Elf_Internal_Dyn dyn;
3318 asection *s;
3319
3320 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3321
3322 switch (dyn.d_tag)
3323 {
3324 default:
3325 continue;
3326
3327 case DT_PLTGOT:
3328 s = htab->sgot->output_section;
3329 BFD_ASSERT (s != NULL);
3330 dyn.d_un.d_ptr = s->vma + htab->sgot->output_offset;
3331 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3332 break;
3333
3334 case DT_JMPREL:
3335 s = htab->srelplt->output_section;
3336 BFD_ASSERT (s != NULL);
3337 dyn.d_un.d_ptr = s->vma;
3338 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3339 break;
3340
3341 case DT_PLTRELSZ:
3342 s = htab->srelplt;
3343 dyn.d_un.d_val = s->size;
3344 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3345 break;
3346
3347 case DT_RELASZ:
3348 /* Don't count procedure linkage table relocs in the
3349 overall reloc count. */
3350 if (htab->srelplt) {
3351 s = htab->srelplt;
3352 dyn.d_un.d_val -= s->size;
3353 }
3354 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3355 break;
3356
3357 case DT_RELA:
3358 /* We may not be using the standard ELF linker script.
3359 If .rela.plt is the first .rela section, we adjust
3360 DT_RELA to not include it. */
3361 if (htab->srelplt) {
3362 s = htab->srelplt;
3363 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3364 dyn.d_un.d_ptr += s->size;
3365 }
3366 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3367 break;
3368 }
3369
3370 }
3371
3372 /* Fill in the first entry in the procedure linkage table. */
3373 splt = htab->splt;
3374 if (splt && splt->size > 0)
3375 {
3376 unsigned long addr;
3377 /* addr = .got + 4 */
3378 addr = htab->sgot->output_section->vma +
3379 htab->sgot->output_offset + 4;
3380 if (info->shared)
3381 {
3382 addr -= splt->output_section->vma + splt->output_offset;
3383 bfd_put_32 (output_bfd,
3384 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3385 splt->contents);
3386 bfd_put_32 (output_bfd,
3387 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3388 splt->contents + 4);
3389 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3390 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3391 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3392 }
3393 else
3394 {
3395 bfd_put_32 (output_bfd,
3396 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3397 splt->contents);
3398 bfd_put_32 (output_bfd,
3399 plt0_entry[1] | ((addr & 0xffff) << 3),
3400 splt->contents + 4);
3401 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3402 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3403 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3404 }
3405
3406 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3407 PLT_ENTRY_SIZE;
3408 }
3409 }
3410
3411 if (htab->sgot != NULL && htab->sgot->size != 0)
3412 {
3413 /* Fill in the first entry in the global offset table.
3414 We use it to point to our dynamic section, if we have one. */
3415 bfd_put_32 (output_bfd,
3416 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3417 htab->sgot->contents);
3418
3419 /* The second entry is reserved for use by the dynamic linker. */
3420 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3421
3422 /* Set .got entry size. */
3423 elf_section_data (htab->sgot->output_section)
3424 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3425 }
3426
3427 return TRUE;
3428}
3429
3430/* Return the section that should be marked against GC for a given
3431 relocation. */
3432
3433static asection *
3434elf_metag_gc_mark_hook (asection *sec,
3435 struct bfd_link_info *info,
3436 Elf_Internal_Rela *rela,
3437 struct elf_link_hash_entry *hh,
3438 Elf_Internal_Sym *sym)
3439{
3440 if (hh != NULL)
3441 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3442 {
3443 case R_METAG_GNU_VTINHERIT:
3444 case R_METAG_GNU_VTENTRY:
3445 return NULL;
3446 }
3447
3448 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3449}
3450
3451/* Update the got and plt entry reference counts for the section being
3452 removed. */
3453
3454static bfd_boolean
3455elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3456 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3457 asection *sec ATTRIBUTE_UNUSED,
3458 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3459{
3460 Elf_Internal_Shdr *symtab_hdr;
3461 struct elf_link_hash_entry **eh_syms;
3462 bfd_signed_vma *local_got_refcounts;
3463 bfd_signed_vma *local_plt_refcounts;
3464 const Elf_Internal_Rela *rel, *relend;
3465
3466 if (info->relocatable)
3467 return TRUE;
3468
3469 elf_section_data (sec)->local_dynrel = NULL;
3470
3471 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3472 eh_syms = elf_sym_hashes (abfd);
3473 local_got_refcounts = elf_local_got_refcounts (abfd);
3474 local_plt_refcounts = local_got_refcounts;
3475 if (local_plt_refcounts != NULL)
3476 local_plt_refcounts += symtab_hdr->sh_info;
3477
3478 relend = relocs + sec->reloc_count;
3479 for (rel = relocs; rel < relend; rel++)
3480 {
3481 unsigned long r_symndx;
3482 unsigned int r_type;
3483 struct elf_link_hash_entry *eh = NULL;
3484
3485 r_symndx = ELF32_R_SYM (rel->r_info);
3486 if (r_symndx >= symtab_hdr->sh_info)
3487 {
3488 struct elf_metag_link_hash_entry *hh;
3489 struct elf_metag_dyn_reloc_entry **hdh_pp;
3490 struct elf_metag_dyn_reloc_entry *hdh_p;
3491
3492 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3493 while (eh->root.type == bfd_link_hash_indirect
3494 || eh->root.type == bfd_link_hash_warning)
3495 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3496 hh = (struct elf_metag_link_hash_entry *) eh;
3497
3498 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3499 hdh_pp = &hdh_p->hdh_next)
3500 if (hdh_p->sec == sec)
3501 {
3502 /* Everything must go for SEC. */
3503 *hdh_pp = hdh_p->hdh_next;
3504 break;
3505 }
3506 }
3507
3508 r_type = ELF32_R_TYPE (rel->r_info);
3509 switch (r_type)
3510 {
3511 case R_METAG_TLS_LDM:
3512 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3513 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3514 break;
3515 case R_METAG_TLS_IE:
3516 case R_METAG_TLS_GD:
3517 case R_METAG_GETSET_GOT:
3518 if (eh != NULL)
3519 {
3520 if (eh->got.refcount > 0)
3521 eh->got.refcount -= 1;
3522 }
3523 else if (local_got_refcounts != NULL)
3524 {
3525 if (local_got_refcounts[r_symndx] > 0)
3526 local_got_refcounts[r_symndx] -= 1;
3527 }
3528 break;
3529
3530 case R_METAG_RELBRANCH_PLT:
3531 if (eh != NULL)
3532 {
3533 if (eh->plt.refcount > 0)
3534 eh->plt.refcount -= 1;
3535 }
3536 break;
3537
3538 case R_METAG_ADDR32:
3539 case R_METAG_HIADDR16:
3540 case R_METAG_LOADDR16:
3541 case R_METAG_GETSETOFF:
3542 case R_METAG_RELBRANCH:
3543 if (eh != NULL)
3544 {
3545 struct elf_metag_link_hash_entry *hh;
3546 struct elf_metag_dyn_reloc_entry **hdh_pp;
3547 struct elf_metag_dyn_reloc_entry *hdh_p;
3548
3549 if (!info->shared && eh->plt.refcount > 0)
3550 eh->plt.refcount -= 1;
3551
3552 hh = (struct elf_metag_link_hash_entry *) eh;
3553
3554 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3555 hdh_pp = &hdh_p->hdh_next)
3556 if (hdh_p->sec == sec)
3557 {
3558 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3559 hdh_p->relative_count -= 1;
3560 hdh_p->count -= 1;
3561 if (hdh_p->count == 0)
3562 *hdh_pp = hdh_p->hdh_next;
3563 break;
3564 }
3565 }
3566 break;
3567
3568 default:
3569 break;
3570 }
3571 }
3572
3573 return TRUE;
3574}
3575
3576/* Determine the type of stub needed, if any, for a call. */
3577
3578static enum elf_metag_stub_type
3579metag_type_of_stub (asection *input_sec,
3580 const Elf_Internal_Rela *rel,
3581 struct elf_metag_link_hash_entry *hh,
3582 bfd_vma destination,
3583 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3584{
3585 bfd_vma location;
3586 bfd_vma branch_offset;
3587 bfd_vma max_branch_offset;
3588
3589 if (hh != NULL &&
3590 !(hh->eh.root.type == bfd_link_hash_defined
3591 || hh->eh.root.type == bfd_link_hash_defweak))
3592 return metag_stub_none;
3593
3594 /* Determine where the call point is. */
3595 location = (input_sec->output_offset
3596 + input_sec->output_section->vma
3597 + rel->r_offset);
3598
3599 branch_offset = destination - location;
3600
3601 /* Determine if a long branch stub is needed. Meta branch offsets
3602 are signed 19 bits 4 byte aligned. */
3603 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3604
3605 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3606 {
3607 if (info->shared)
3608 return metag_stub_long_branch_shared;
3609 else
3610 return metag_stub_long_branch;
3611 }
3612
3613 return metag_stub_none;
3614}
3615
3616#define MOVT_A0_3 0x82180005
3617#define JUMP_A0_3 0xac180003
3618
3619#define MOVT_A1LBP 0x83080005
3620#define ADD_A1LBP 0x83080000
3621
3622#define ADDT_A0_3_CPC 0x82980001
3623#define ADD_A0_3_A0_3 0x82180000
3624#define MOV_PC_A0_3 0xa3180ca0
3625
3626static bfd_boolean
3627metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3628{
3629 struct elf_metag_stub_hash_entry *hsh;
3630 asection *stub_sec;
3631 bfd *stub_bfd;
3632 bfd_byte *loc;
3633 bfd_vma sym_value;
3634 int size;
3635
3636 /* Massage our args to the form they really have. */
3637 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3638
3639 stub_sec = hsh->stub_sec;
3640
3641 /* Make a note of the offset within the stubs for this entry. */
3642 hsh->stub_offset = stub_sec->size;
3643 loc = stub_sec->contents + hsh->stub_offset;
3644
3645 stub_bfd = stub_sec->owner;
3646
3647 switch (hsh->stub_type)
3648 {
3649 case metag_stub_long_branch_shared:
3650 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3651 calculate the jump target using A0.3 as a temporary. Then a MOV
3652 to PC carries out the jump. */
3653 sym_value = (hsh->target_value
3654 + hsh->target_section->output_offset
3655 + hsh->target_section->output_section->vma
3656 + hsh->addend);
3657
3658 sym_value -= (hsh->stub_offset
3659 + stub_sec->output_offset
3660 + stub_sec->output_section->vma);
3661
3662 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3663 loc);
3664
3665 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3666 loc + 4);
3667
3668 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3669
3670 size = 12;
3671 break;
3672 case metag_stub_long_branch:
3673 /* A standard long branch stub is a MOVT instruction followed by a
3674 JUMP instruction using the A0.3 register as a temporary. This is
3675 the same method used by the LDLK linker (patch.c). */
3676 sym_value = (hsh->target_value
3677 + hsh->target_section->output_offset
3678 + hsh->target_section->output_section->vma
3679 + hsh->addend);
3680
3681 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3682 loc);
3683
3684 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3685
3686 size = 8;
3687 break;
3688 default:
3689 BFD_FAIL ();
3690 return FALSE;
3691 }
3692
3693 stub_sec->size += size;
3694 return TRUE;
3695}
3696
3697/* As above, but don't actually build the stub. Just bump offset so
3698 we know stub section sizes. */
3699
3700static bfd_boolean
3701metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3702{
3703 struct elf_metag_stub_hash_entry *hsh;
3704 int size = 0;
3705
3706 /* Massage our args to the form they really have. */
3707 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3708
3709 if (hsh->stub_type == metag_stub_long_branch)
3710 size = 8;
3711 else if (hsh->stub_type == metag_stub_long_branch_shared)
3712 size = 12;
3713
3714 hsh->stub_sec->size += size;
3715 return TRUE;
3716}
3717
3718/* Set up various things so that we can make a list of input sections
3719 for each output section included in the link. Returns -1 on error,
3720 0 when no stubs will be needed, and 1 on success. */
3721
3722int
3723elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3724{
3725 bfd *input_bfd;
3726 unsigned int bfd_count;
3727 int top_id, top_index;
3728 asection *section;
3729 asection **input_list, **list;
3730 bfd_size_type amt;
3731 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3732
3733 /* Count the number of input BFDs and find the top input section id. */
3734 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3735 input_bfd != NULL;
c72f2fb2 3736 input_bfd = input_bfd->link.next)
a3c62988
NC		 3737 {
3738 bfd_count += 1;
3739 for (section = input_bfd->sections;
3740 section != NULL;
3741 section = section->next)
3742 {
3743 if (top_id < section->id)
3744 top_id = section->id;
3745 }
3746 }
3747
3748 htab->bfd_count = bfd_count;
3749
3750 amt = sizeof (struct map_stub) * (top_id + 1);
3751 htab->stub_group = bfd_zmalloc (amt);
3752 if (htab->stub_group == NULL)
3753 return -1;
3754
3755 /* We can't use output_bfd->section_count here to find the top output
3756 section index as some sections may have been removed, and
3757 strip_excluded_output_sections doesn't renumber the indices. */
3758 for (section = output_bfd->sections, top_index = 0;
3759 section != NULL;
3760 section = section->next)
3761 {
3762 if (top_index < section->index)
3763 top_index = section->index;
3764 }
3765
3766 htab->top_index = top_index;
3767 amt = sizeof (asection *) * (top_index + 1);
3768 input_list = bfd_malloc (amt);
3769 htab->input_list = input_list;
3770 if (input_list == NULL)
3771 return -1;
3772
3773 /* For sections we aren't interested in, mark their entries with a
3774 value we can check later. */
3775 list = input_list + top_index;
3776 do
3777 *list = bfd_abs_section_ptr;
3778 while (list-- != input_list);
3779
3780 for (section = output_bfd->sections;
3781 section != NULL;
3782 section = section->next)
3783 {
3784 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3785 * have PC relative relocs in them but no code flag set. */
3786 if (((section->flags & SEC_CODE) != 0) ||
3787 strcmp(".ctors", section->name) ||
3788 strcmp(".dtors", section->name))
3789 input_list[section->index] = NULL;
3790 }
3791
3792 return 1;
3793}
3794
3795/* The linker repeatedly calls this function for each input section,
3796 in the order that input sections are linked into output sections.
3797 Build lists of input sections to determine groupings between which
3798 we may insert linker stubs. */
3799
3800void
3801elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3802{
3803 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3804
3805 if (isec->output_section->index <= htab->top_index)
3806 {
3807 asection **list = htab->input_list + isec->output_section->index;
3808 if (*list != bfd_abs_section_ptr)
3809 {
3810 /* Steal the link_sec pointer for our list. */
3811#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3812 /* This happens to make the list in reverse order,
3813 which is what we want. */
3814 PREV_SEC (isec) = *list;
3815 *list = isec;
3816 }
3817 }
3818}
3819
3820/* See whether we can group stub sections together. Grouping stub
3821 sections may result in fewer stubs. More importantly, we need to
3822 put all .init* and .fini* stubs at the beginning of the .init or
3823 .fini output sections respectively, because glibc splits the
3824 _init and _fini functions into multiple parts. Putting a stub in
3825 the middle of a function is not a good idea. */
3826
3827static void
3828group_sections (struct elf_metag_link_hash_table *htab,
3829 bfd_size_type stub_group_size,
3830 bfd_boolean stubs_always_before_branch)
3831{
3832 asection **list = htab->input_list + htab->top_index;
3833 do
3834 {
3835 asection *tail = *list;
3836 if (tail == bfd_abs_section_ptr)
3837 continue;
3838 while (tail != NULL)
3839 {
3840 asection *curr;
3841 asection *prev;
3842 bfd_size_type total;
3843 bfd_boolean big_sec;
3844
3845 curr = tail;
3846 total = tail->size;
3847 big_sec = total >= stub_group_size;
3848
3849 while ((prev = PREV_SEC (curr)) != NULL
3850 && ((total += curr->output_offset - prev->output_offset)
3851 < stub_group_size))
3852 curr = prev;
3853
3854 /* OK, the size from the start of CURR to the end is less
3855 than stub_group_size bytes and thus can be handled by one stub
3856 section. (or the tail section is itself larger than
3857 stub_group_size bytes, in which case we may be toast.)
3858 We should really be keeping track of the total size of
3859 stubs added here, as stubs contribute to the final output
3860 section size. */
3861 do
3862 {
3863 prev = PREV_SEC (tail);
3864 /* Set up this stub group. */
3865 htab->stub_group[tail->id].link_sec = curr;
3866 }
3867 while (tail != curr && (tail = prev) != NULL);
3868
3869 /* But wait, there's more! Input sections up to stub_group_size
3870 bytes before the stub section can be handled by it too.
3871 Don't do this if we have a really large section after the
3872 stubs, as adding more stubs increases the chance that
3873 branches may not reach into the stub section. */
3874 if (!stubs_always_before_branch && !big_sec)
3875 {
3876 total = 0;
3877 while (prev != NULL
3878 && ((total += tail->output_offset - prev->output_offset)
3879 < stub_group_size))
3880 {
3881 tail = prev;
3882 prev = PREV_SEC (tail);
3883 htab->stub_group[tail->id].link_sec = curr;
3884 }
3885 }
3886 tail = prev;
3887 }
3888 }
3889 while (list-- != htab->input_list);
3890 free (htab->input_list);
3891#undef PREV_SEC
3892}
3893
3894/* Read in all local syms for all input bfds.
3895 Returns -1 on error, 0 otherwise. */
3896
3897static int
3898get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3899 struct bfd_link_info *info)
3900{
3901 unsigned int bfd_indx;
3902 Elf_Internal_Sym *local_syms, **all_local_syms;
3903 int stub_changed = 0;
3904 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3905
3906 /* We want to read in symbol extension records only once. To do this
3907 we need to read in the local symbols in parallel and save them for
3908 later use; so hold pointers to the local symbols in an array. */
3909 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3910 all_local_syms = bfd_zmalloc (amt);
3911 htab->all_local_syms = all_local_syms;
3912 if (all_local_syms == NULL)
3913 return -1;
3914
3915 /* Walk over all the input BFDs, swapping in local symbols. */
3916 for (bfd_indx = 0;
3917 input_bfd != NULL;
c72f2fb2 3918 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3919 {
3920 Elf_Internal_Shdr *symtab_hdr;
3921
3922 /* We'll need the symbol table in a second. */
3923 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3924 if (symtab_hdr->sh_info == 0)
3925 continue;
3926
3927 /* We need an array of the local symbols attached to the input bfd. */
3928 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3929 if (local_syms == NULL)
3930 {
3931 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3932 symtab_hdr->sh_info, 0,
3933 NULL, NULL, NULL);
3934 /* Cache them for elf_link_input_bfd. */
3935 symtab_hdr->contents = (unsigned char *) local_syms;
3936 }
3937 if (local_syms == NULL)
3938 return -1;
3939
3940 all_local_syms[bfd_indx] = local_syms;
3941 }
3942
3943 return stub_changed;
3944}
3945
3946/* Determine and set the size of the stub section for a final link.
3947
3948The basic idea here is to examine all the relocations looking for
3949PC-relative calls to a target that is unreachable with a "CALLR"
3950instruction. */
3951
3952/* See elf32-hppa.c and elf64-ppc.c. */
3953
3954bfd_boolean
3955elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3956 struct bfd_link_info *info,
3957 bfd_signed_vma group_size,
3958 asection * (*add_stub_section) (const char *, asection *),
3959 void (*layout_sections_again) (void))
3960{
3961 bfd_size_type stub_group_size;
3962 bfd_boolean stubs_always_before_branch;
3963 bfd_boolean stub_changed;
3964 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3965
3966 /* Stash our params away. */
3967 htab->stub_bfd = stub_bfd;
3968 htab->add_stub_section = add_stub_section;
3969 htab->layout_sections_again = layout_sections_again;
3970 stubs_always_before_branch = group_size < 0;
3971 if (group_size < 0)
3972 stub_group_size = -group_size;
3973 else
3974 stub_group_size = group_size;
3975 if (stub_group_size == 1)
3976 {
3977 /* Default values. */
3978 /* FIXME: not sure what these values should be */
3979 if (stubs_always_before_branch)
3980 {
3981 stub_group_size = (1 << BRANCH_BITS);
3982 }
3983 else
3984 {
3985 stub_group_size = (1 << BRANCH_BITS);
3986 }
3987 }
3988
3989 group_sections (htab, stub_group_size, stubs_always_before_branch);
3990
3991 switch (get_local_syms (output_bfd, info->input_bfds, info))
3992 {
3993 default:
3994 if (htab->all_local_syms)
3995 goto error_ret_free_local;
3996 return FALSE;
3997
3998 case 0:
3999 stub_changed = FALSE;
4000 break;
4001
4002 case 1:
4003 stub_changed = TRUE;
4004 break;
4005 }
4006
4007 while (1)
4008 {
4009 bfd *input_bfd;
4010 unsigned int bfd_indx;
4011 asection *stub_sec;
4012
4013 for (input_bfd = info->input_bfds, bfd_indx = 0;
4014 input_bfd != NULL;
c72f2fb2 4015 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 4016 {
4017 Elf_Internal_Shdr *symtab_hdr;
4018 asection *section;
4019 Elf_Internal_Sym *local_syms;
4020
4021 /* We'll need the symbol table in a second. */
4022 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4023 if (symtab_hdr->sh_info == 0)
4024 continue;
4025
4026 local_syms = htab->all_local_syms[bfd_indx];
4027
4028 /* Walk over each section attached to the input bfd. */
4029 for (section = input_bfd->sections;
4030 section != NULL;
4031 section = section->next)
4032 {
4033 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4034
4035 /* If there aren't any relocs, then there's nothing more
4036 to do. */
4037 if ((section->flags & SEC_RELOC) == 0
4038 || section->reloc_count == 0)
4039 continue;
4040
4041 /* If this section is a link-once section that will be
4042 discarded, then don't create any stubs. */
4043 if (section->output_section == NULL
4044 || section->output_section->owner != output_bfd)
4045 continue;
4046
4047 /* Get the relocs. */
4048 internal_relocs
4049 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4050 info->keep_memory);
4051 if (internal_relocs == NULL)
4052 goto error_ret_free_local;
4053
4054 /* Now examine each relocation. */
4055 irela = internal_relocs;
4056 irelaend = irela + section->reloc_count;
4057 for (; irela < irelaend; irela++)
4058 {
4059 unsigned int r_type, r_indx;
4060 enum elf_metag_stub_type stub_type;
4061 struct elf_metag_stub_hash_entry *hsh;
4062 asection *sym_sec;
4063 bfd_vma sym_value;
4064 bfd_vma destination;
4065 struct elf_metag_link_hash_entry *hh;
4066 char *stub_name;
4067 const asection *id_sec;
4068
4069 r_type = ELF32_R_TYPE (irela->r_info);
4070 r_indx = ELF32_R_SYM (irela->r_info);
4071
4072 if (r_type >= (unsigned int) R_METAG_MAX)
4073 {
4074 bfd_set_error (bfd_error_bad_value);
4075 error_ret_free_internal:
4076 if (elf_section_data (section)->relocs == NULL)
4077 free (internal_relocs);
4078 goto error_ret_free_local;
4079 }
4080
4081 /* Only look for stubs on CALLR and B instructions. */
4082 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4083 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4084 continue;
4085
4086 /* Now determine the call target, its name, value,
4087 section. */
4088 sym_sec = NULL;
4089 sym_value = 0;
4090 destination = 0;
4091 hh = NULL;
4092 if (r_indx < symtab_hdr->sh_info)
4093 {
4094 /* It's a local symbol. */
4095 Elf_Internal_Sym *sym;
4096 Elf_Internal_Shdr *hdr;
4097 unsigned int shndx;
4098
4099 sym = local_syms + r_indx;
4100 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4101 sym_value = sym->st_value;
4102 shndx = sym->st_shndx;
4103 if (shndx < elf_numsections (input_bfd))
4104 {
4105 hdr = elf_elfsections (input_bfd)[shndx];
4106 sym_sec = hdr->bfd_section;
4107 destination = (sym_value + irela->r_addend
4108 + sym_sec->output_offset
4109 + sym_sec->output_section->vma);
4110 }
4111 }
4112 else
4113 {
4114 /* It's an external symbol. */
4115 int e_indx;
4116
4117 e_indx = r_indx - symtab_hdr->sh_info;
4118 hh = ((struct elf_metag_link_hash_entry *)
4119 elf_sym_hashes (input_bfd)[e_indx]);
4120
4121 while (hh->eh.root.type == bfd_link_hash_indirect
4122 || hh->eh.root.type == bfd_link_hash_warning)
4123 hh = ((struct elf_metag_link_hash_entry *)
4124 hh->eh.root.u.i.link);
4125
4126 if (hh->eh.root.type == bfd_link_hash_defined
4127 || hh->eh.root.type == bfd_link_hash_defweak)
4128 {
4129 sym_sec = hh->eh.root.u.def.section;
4130 sym_value = hh->eh.root.u.def.value;
4131 if (hh->eh.plt.offset != (bfd_vma) -1
4132 && hh->eh.dynindx != -1
4133 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4134 {
4135 sym_sec = htab->splt;
4136 sym_value = hh->eh.plt.offset;
4137 }
4138
4139 if (sym_sec->output_section != NULL)
4140 destination = (sym_value + irela->r_addend
4141 + sym_sec->output_offset
4142 + sym_sec->output_section->vma);
4143 else
4144 continue;
4145 }
4146 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4147 {
4148 if (! info->shared)
4149 continue;
4150 }
4151 else if (hh->eh.root.type == bfd_link_hash_undefined)
4152 {
4153 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4154 && (ELF_ST_VISIBILITY (hh->eh.other)
4155 == STV_DEFAULT)))
4156 continue;
4157 }
4158 else
4159 {
4160 bfd_set_error (bfd_error_bad_value);
4161 goto error_ret_free_internal;
4162 }
4163 }
4164
4165 /* Determine what (if any) linker stub is needed. */
4166 stub_type = metag_type_of_stub (section, irela, hh,
4167 destination, info);
4168 if (stub_type == metag_stub_none)
4169 continue;
4170
4171 /* Support for grouping stub sections. */
4172 id_sec = htab->stub_group[section->id].link_sec;
4173
4174 /* Get the name of this stub. */
4175 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4176 if (!stub_name)
4177 goto error_ret_free_internal;
4178
4179 hsh = metag_stub_hash_lookup (&htab->bstab,
4180 stub_name,
4181 FALSE, FALSE);
4182 if (hsh != NULL)
4183 {
4184 /* The proper stub has already been created. */
4185 free (stub_name);
4186 continue;
4187 }
4188
4189 hsh = metag_add_stub (stub_name, section, htab);
4190 if (hsh == NULL)
4191 {
4192 free (stub_name);
4193 goto error_ret_free_internal;
4194 }
4195 hsh->target_value = sym_value;
4196 hsh->target_section = sym_sec;
4197 hsh->stub_type = stub_type;
4198 hsh->hh = hh;
4199 hsh->addend = irela->r_addend;
4200 stub_changed = TRUE;
4201 }
4202
4203 /* We're done with the internal relocs, free them. */
4204 if (elf_section_data (section)->relocs == NULL)
4205 free (internal_relocs);
4206 }
4207 }
4208
4209 if (!stub_changed)
4210 break;
4211
4212 /* OK, we've added some stubs. Find out the new size of the
4213 stub sections. */
4214 for (stub_sec = htab->stub_bfd->sections;
4215 stub_sec != NULL;
4216 stub_sec = stub_sec->next)
4217 stub_sec->size = 0;
4218
4219 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4220
4221 /* Ask the linker to do its stuff. */
4222 (*htab->layout_sections_again) ();
4223 stub_changed = FALSE;
4224 }
4225
4226 free (htab->all_local_syms);
4227 return TRUE;
4228
4229 error_ret_free_local:
4230 free (htab->all_local_syms);
4231 return FALSE;
4232}
4233
4234/* Build all the stubs associated with the current output file. The
4235 stubs are kept in a hash table attached to the main linker hash
4236 table. This function is called via metagelf_finish in the linker. */
4237
4238bfd_boolean
4239elf_metag_build_stubs (struct bfd_link_info *info)
4240{
4241 asection *stub_sec;
4242 struct bfd_hash_table *table;
4243 struct elf_metag_link_hash_table *htab;
4244
4245 htab = metag_link_hash_table (info);
4246
4247 for (stub_sec = htab->stub_bfd->sections;
4248 stub_sec != NULL;
4249 stub_sec = stub_sec->next)
4250 {
4251 bfd_size_type size;
4252
4253 /* Allocate memory to hold the linker stubs. */
4254 size = stub_sec->size;
4255 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4256 if (stub_sec->contents == NULL && size != 0)
4257 return FALSE;
4258 stub_sec->size = 0;
4259 }
4260
4261 /* Build the stubs as directed by the stub hash table. */
4262 table = &htab->bstab;
4263 bfd_hash_traverse (table, metag_build_one_stub, info);
4264
4265 return TRUE;
4266}
4267
4268/* Return TRUE if SYM represents a local label symbol. */
4269
4270static bfd_boolean
4271elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4272{
4273 if (name[0] == '$' && name[1] == 'L')
4274 return 1;
4275 return _bfd_elf_is_local_label_name (abfd, name);
4276}
4277
4278/* Return address for Ith PLT stub in section PLT, for relocation REL
4279 or (bfd_vma) -1 if it should not be included. */
4280
4281static bfd_vma
4282elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4283 const arelent *rel ATTRIBUTE_UNUSED)
4284{
4285 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4286}
4287
4288#define ELF_ARCH bfd_arch_metag
4289#define ELF_TARGET_ID METAG_ELF_DATA
4290#define ELF_MACHINE_CODE EM_METAG
4291#define ELF_MINPAGESIZE 0x1000
4292#define ELF_MAXPAGESIZE 0x4000
4293#define ELF_COMMONPAGESIZE 0x1000
4294
6d00b590 4295#define TARGET_LITTLE_SYM metag_elf32_vec
a3c62988
NC		 4296#define TARGET_LITTLE_NAME "elf32-metag"
4297
4298#define elf_symbol_leading_char '_'
4299
4300#define elf_info_to_howto_rel NULL
4301#define elf_info_to_howto metag_info_to_howto_rela
4302
4303#define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4304#define bfd_elf32_bfd_link_hash_table_create \
4305 elf_metag_link_hash_table_create
a3c62988
NC		 4306#define elf_backend_relocate_section elf_metag_relocate_section
4307#define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4308#define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4309#define elf_backend_check_relocs elf_metag_check_relocs
4310#define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4311#define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4312#define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4313#define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4314#define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4315#define elf_backend_omit_section_dynsym \
4316 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4317#define elf_backend_post_process_headers elf_metag_post_process_headers
4318#define elf_backend_reloc_type_class elf_metag_reloc_type_class
4319#define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4320#define elf_backend_plt_sym_val elf_metag_plt_sym_val
4321
4322#define elf_backend_can_gc_sections 1
4323#define elf_backend_can_refcount 1
4324#define elf_backend_got_header_size 12
4325#define elf_backend_rela_normal 1
4326#define elf_backend_want_got_sym 0
4327#define elf_backend_want_plt_sym 0
4328#define elf_backend_plt_readonly 1
4329
4330#define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4331#define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4332
4333#include "elf32-target.h"
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