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Enable support for the AArch64 dot-prod instruction in the Cortex A55 and A75 cpus.
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
CommitLineData
a3c62988 1/* Meta support for 32-bit ELF
2571583a 2 Copyright (C) 2013-2017 Free Software Foundation, Inc.
a3c62988
NC		 3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22#include "sysdep.h"
23#include "bfd.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
26#include "elf32-metag.h"
27#include "elf/metag.h"
28
29#define GOT_ENTRY_SIZE 4
30#define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32/* ABI version:
33 0 - original
34 1 - with GOT offset */
35#define METAG_ELF_ABI_VERSION 1
36
37static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73/* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93#define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95static reloc_howto_type elf_metag_howto_table[] =
96{
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
6346d5ca 145 3, /* size (0 = byte, 1 = short, 2 = long) */
a3c62988
NC		 146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681};
682
683#define BRANCH_BITS 19
684
685/* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694#define GOT_REG_OFFSET 0x2000
695
696struct metag_reloc_map
697{
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700};
701
702static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746enum elf_metag_stub_type
747{
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751};
752
753struct elf_metag_stub_hash_entry
754{
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780};
781
782struct elf_metag_link_hash_entry
783{
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811};
812
813struct elf_metag_link_hash_table
814{
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
7292b3ac 841 unsigned int top_index;
a3c62988
NC		 842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
a3c62988
NC		 845 /* Small local sym cache. */
846 struct sym_cache sym_cache;
847
848 /* Data for LDM relocations. */
849 union
850 {
851 bfd_signed_vma refcount;
852 bfd_vma offset;
853 } tls_ldm_got;
854};
855
856/* Return the base vma address which should be subtracted from the
857 real address when resolving a dtpoff relocation. This is PT_TLS
858 segment p_vaddr. */
859static bfd_vma
860dtpoff_base (struct bfd_link_info *info)
861{
862 /* If tls_sec is NULL, we should have signalled an error already. */
863 if (elf_hash_table (info)->tls_sec == NULL)
864 return 0;
865 return elf_hash_table (info)->tls_sec->vma;
866}
867
868/* Return the relocation value for R_METAG_TLS_IE */
869static bfd_vma
870tpoff (struct bfd_link_info *info, bfd_vma address)
871{
872 /* If tls_sec is NULL, we should have signalled an error already. */
873 if (elf_hash_table (info)->tls_sec == NULL)
874 return 0;
875 /* METAG TLS ABI is variant I and static TLS blocks start just after
876 tcbhead structure which has 2 pointer fields. */
877 return (address - elf_hash_table (info)->tls_sec->vma
878 + align_power ((bfd_vma) 8,
879 elf_hash_table (info)->tls_sec->alignment_power));
880}
881
882static void
883metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
884 arelent *cache_ptr,
885 Elf_Internal_Rela *dst)
886{
887 unsigned int r_type;
888
889 r_type = ELF32_R_TYPE (dst->r_info);
5860e3f8
NC		 890 if (r_type >= (unsigned int) R_METAG_MAX)
891 {
695344c0 892 /* xgettext:c-format */
64d29018 893 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
5860e3f8
NC		 894 r_type = 0;
895 }
a3c62988
NC		 896 cache_ptr->howto = & elf_metag_howto_table [r_type];
897}
898
899static reloc_howto_type *
900metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
901 bfd_reloc_code_real_type code)
902{
903 unsigned int i;
904
905 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
906 if (metag_reloc_map [i].bfd_reloc_val == code)
907 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
908
909 return NULL;
910}
911
912static reloc_howto_type *
913metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
914 const char *r_name)
915{
916 unsigned int i;
917
918 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
919 if (elf_metag_howto_table[i].name != NULL
920 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
921 return &elf_metag_howto_table[i];
922
923 return NULL;
924}
925
926/* Various hash macros and functions. */
927#define metag_link_hash_table(p) \
928 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
929 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
930
931#define metag_elf_hash_entry(ent) \
932 ((struct elf_metag_link_hash_entry *)(ent))
933
934#define metag_stub_hash_entry(ent) \
935 ((struct elf_metag_stub_hash_entry *)(ent))
936
937#define metag_stub_hash_lookup(table, string, create, copy) \
938 ((struct elf_metag_stub_hash_entry *) \
939 bfd_hash_lookup ((table), (string), (create), (copy)))
940
941#define metag_elf_local_got_tls_type(abfd) \
942 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
943
944/* Assorted hash table functions. */
945
946/* Initialize an entry in the stub hash table. */
947
948static struct bfd_hash_entry *
949stub_hash_newfunc (struct bfd_hash_entry *entry,
950 struct bfd_hash_table *table,
951 const char *string)
952{
953 /* Allocate the structure if it has not already been allocated by a
954 subclass. */
955 if (entry == NULL)
956 {
957 entry = bfd_hash_allocate (table,
958 sizeof (struct elf_metag_stub_hash_entry));
959 if (entry == NULL)
960 return entry;
961 }
962
963 /* Call the allocation method of the superclass. */
964 entry = bfd_hash_newfunc (entry, table, string);
965 if (entry != NULL)
966 {
967 struct elf_metag_stub_hash_entry *hsh;
968
969 /* Initialize the local fields. */
970 hsh = (struct elf_metag_stub_hash_entry *) entry;
971 hsh->stub_sec = NULL;
972 hsh->stub_offset = 0;
973 hsh->target_value = 0;
974 hsh->target_section = NULL;
975 hsh->stub_type = metag_stub_long_branch;
976 hsh->hh = NULL;
977 hsh->id_sec = NULL;
978 }
979
980 return entry;
981}
982
983/* Initialize an entry in the link hash table. */
984
985static struct bfd_hash_entry *
986metag_link_hash_newfunc (struct bfd_hash_entry *entry,
987 struct bfd_hash_table *table,
988 const char *string)
989{
990 /* Allocate the structure if it has not already been allocated by a
991 subclass. */
992 if (entry == NULL)
993 {
994 entry = bfd_hash_allocate (table,
995 sizeof (struct elf_metag_link_hash_entry));
996 if (entry == NULL)
997 return entry;
998 }
999
1000 /* Call the allocation method of the superclass. */
1001 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1002 if (entry != NULL)
1003 {
1004 struct elf_metag_link_hash_entry *hh;
1005
1006 /* Initialize the local fields. */
1007 hh = (struct elf_metag_link_hash_entry *) entry;
1008 hh->hsh_cache = NULL;
1009 hh->dyn_relocs = NULL;
1010 hh->tls_type = GOT_UNKNOWN;
1011 }
1012
1013 return entry;
1014}
1015
68faa637
AM		 1016/* Free the derived linker hash table. */
1017
1018static void
d495ab0d 1019elf_metag_link_hash_table_free (bfd *obfd)
68faa637
AM		 1020{
1021 struct elf_metag_link_hash_table *htab
d495ab0d 1022 = (struct elf_metag_link_hash_table *) obfd->link.hash;
68faa637
AM		 1023
1024 bfd_hash_table_free (&htab->bstab);
d495ab0d 1025 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1026}
1027
a3c62988
NC		 1028/* Create the derived linker hash table. The Meta ELF port uses the derived
1029 hash table to keep information specific to the Meta ELF linker (without
1030 using static variables). */
1031
1032static struct bfd_link_hash_table *
1033elf_metag_link_hash_table_create (bfd *abfd)
1034{
1035 struct elf_metag_link_hash_table *htab;
1036 bfd_size_type amt = sizeof (*htab);
1037
7bf52ea2 1038 htab = bfd_zmalloc (amt);
a3c62988
NC		 1039 if (htab == NULL)
1040 return NULL;
1041
1042 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1043 metag_link_hash_newfunc,
1044 sizeof (struct elf_metag_link_hash_entry),
1045 METAG_ELF_DATA))
1046 {
1047 free (htab);
1048 return NULL;
1049 }
1050
1051 /* Init the stub hash table too. */
1052 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1053 sizeof (struct elf_metag_stub_hash_entry)))
d495ab0d
AM		 1054 {
1055 _bfd_elf_link_hash_table_free (abfd);
1056 return NULL;
1057 }
1058 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
a3c62988 1059
a3c62988
NC		 1060 return &htab->etab.root;
1061}
1062
a3c62988
NC		 1063/* Section name for stubs is the associated section name plus this
1064 string. */
1065#define STUB_SUFFIX ".stub"
1066
1067/* Build a name for an entry in the stub hash table. */
1068
1069static char *
1070metag_stub_name (const asection *input_section,
1071 const asection *sym_sec,
1072 const struct elf_metag_link_hash_entry *hh,
1073 const Elf_Internal_Rela *rel)
1074{
1075 char *stub_name;
1076 bfd_size_type len;
1077
1078 if (hh)
1079 {
1080 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1081 stub_name = bfd_malloc (len);
1082 if (stub_name != NULL)
1083 {
1084 sprintf (stub_name, "%08x_%s+%x",
1085 input_section->id & 0xffffffff,
1086 hh->eh.root.root.string,
1087 (int) rel->r_addend & 0xffffffff);
1088 }
1089 }
1090 else
1091 {
1092 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1093 stub_name = bfd_malloc (len);
1094 if (stub_name != NULL)
1095 {
1096 sprintf (stub_name, "%08x_%x:%x+%x",
1097 input_section->id & 0xffffffff,
1098 sym_sec->id & 0xffffffff,
1099 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1100 (int) rel->r_addend & 0xffffffff);
1101 }
1102 }
1103 return stub_name;
1104}
1105
1106/* Look up an entry in the stub hash. Stub entries are cached because
1107 creating the stub name takes a bit of time. */
1108
1109static struct elf_metag_stub_hash_entry *
1110metag_get_stub_entry (const asection *input_section,
1111 const asection *sym_sec,
1112 struct elf_metag_link_hash_entry *hh,
1113 const Elf_Internal_Rela *rel,
1114 struct elf_metag_link_hash_table *htab)
1115{
1116 struct elf_metag_stub_hash_entry *hsh;
1117 const asection *id_sec;
1118
1119 /* If this input section is part of a group of sections sharing one
1120 stub section, then use the id of the first section in the group.
1121 Stub names need to include a section id, as there may well be
1122 more than one stub used to reach say, printf, and we need to
1123 distinguish between them. */
1124 id_sec = htab->stub_group[input_section->id].link_sec;
1125
1126 if (hh != NULL && hh->hsh_cache != NULL
1127 && hh->hsh_cache->hh == hh
1128 && hh->hsh_cache->id_sec == id_sec)
1129 {
1130 hsh = hh->hsh_cache;
1131 }
1132 else
1133 {
1134 char *stub_name;
1135
1136 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1137 if (stub_name == NULL)
1138 return NULL;
1139
1140 hsh = metag_stub_hash_lookup (&htab->bstab,
1141 stub_name, FALSE, FALSE);
1142
1143 if (hh != NULL)
1144 hh->hsh_cache = hsh;
1145
1146 free (stub_name);
1147 }
1148
1149 return hsh;
1150}
1151
1152/* Add a new stub entry to the stub hash. Not all fields of the new
1153 stub entry are initialised. */
1154
1155static struct elf_metag_stub_hash_entry *
1156metag_add_stub (const char *stub_name,
1157 asection *section,
1158 struct elf_metag_link_hash_table *htab)
1159{
1160 asection *link_sec;
1161 asection *stub_sec;
1162 struct elf_metag_stub_hash_entry *hsh;
1163
1164 link_sec = htab->stub_group[section->id].link_sec;
1165 stub_sec = htab->stub_group[section->id].stub_sec;
1166 if (stub_sec == NULL)
1167 {
1168 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1169 if (stub_sec == NULL)
1170 {
1171 size_t namelen;
1172 bfd_size_type len;
1173 char *s_name;
1174
1175 namelen = strlen (link_sec->name);
1176 len = namelen + sizeof (STUB_SUFFIX);
1177 s_name = bfd_alloc (htab->stub_bfd, len);
1178 if (s_name == NULL)
1179 return NULL;
1180
1181 memcpy (s_name, link_sec->name, namelen);
1182 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1183
1184 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1185 if (stub_sec == NULL)
1186 return NULL;
1187 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1188 }
1189 htab->stub_group[section->id].stub_sec = stub_sec;
1190 }
1191
1192 /* Enter this entry into the linker stub hash table. */
1193 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1194 TRUE, FALSE);
1195 if (hsh == NULL)
1196 {
695344c0 1197 /* xgettext:c-format */
4eca0228
AM		 1198 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1199 section->owner, stub_name);
a3c62988
NC		 1200 return NULL;
1201 }
1202
1203 hsh->stub_sec = stub_sec;
1204 hsh->stub_offset = 0;
1205 hsh->id_sec = link_sec;
1206 return hsh;
1207}
1208
1209/* Check a signed integer value can be represented in the given number
1210 of bits. */
1211
1212static bfd_boolean
1213within_signed_range (int value, unsigned int bits)
1214{
1215 int min_val = -(1 << (bits - 1));
1216 int max_val = (1 << (bits - 1)) - 1;
1217 return (value <= max_val) && (value >= min_val);
1218}
1219
1220/* Perform a relocation as part of a final link. */
1221
1222static bfd_reloc_status_type
1223metag_final_link_relocate (reloc_howto_type *howto,
1224 bfd *input_bfd,
1225 asection *input_section,
1226 bfd_byte *contents,
1227 Elf_Internal_Rela *rel,
1228 bfd_vma relocation,
1229 struct elf_metag_link_hash_entry *hh,
1230 struct elf_metag_link_hash_table *htab,
1231 asection *sym_sec)
1232{
1233 bfd_reloc_status_type r = bfd_reloc_ok;
1234 bfd_byte *hit_data = contents + rel->r_offset;
1235 int opcode, op_shift, op_extended, l1, l2;
1236 bfd_signed_vma srel, addend = rel->r_addend;
1237 struct elf_metag_stub_hash_entry *hsh = NULL;
1238 bfd_vma location;
1239
1240 /* Find out where we are and where we're going. */
1241 location = (rel->r_offset +
1242 input_section->output_offset +
1243 input_section->output_section->vma);
1244
1245 switch (howto->type)
1246 {
1247 case R_METAG_RELBRANCH:
1248 case R_METAG_RELBRANCH_PLT:
1249 /* Make it a pc relative offset. */
1250 relocation -= location;
1251 break;
1252 case R_METAG_TLS_GD:
1253 case R_METAG_TLS_IE:
1254 relocation -= elf_gp (input_section->output_section->owner);
1255 break;
1256 default:
1257 break;
1258 }
1259
1260 switch (howto->type)
1261 {
1262 case R_METAG_RELBRANCH_PLT:
1263 case R_METAG_RELBRANCH:
1264 opcode = bfd_get_32 (input_bfd, hit_data);
1265
1266 srel = (bfd_signed_vma) relocation;
1267 srel += addend;
1268
1269 /* If the branch is out of reach, then redirect the
1270 call to the local stub for this function. */
1271 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1272 (srel < - (1 << (BRANCH_BITS + 1))))
1273 {
1274 if (sym_sec == NULL)
1275 break;
1276
1277 hsh = metag_get_stub_entry (input_section, sym_sec,
1278 hh, rel, htab);
1279 if (hsh == NULL)
1280 return bfd_reloc_undefined;
1281
1282 /* Munge up the value and addend so that we call the stub
1283 rather than the procedure directly. */
1284 srel = (hsh->stub_offset
1285 + hsh->stub_sec->output_offset
1286 + hsh->stub_sec->output_section->vma);
1287 srel -= location;
1288 }
1289
1290 srel = srel >> 2;
1291
1292 if (!within_signed_range (srel, BRANCH_BITS))
1293 {
1294 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1295 srel = 0;
1296 else
1297 return bfd_reloc_overflow;
1298 }
1299
1300 opcode &= ~(0x7ffff << 5);
1301 opcode |= ((srel & 0x7ffff) << 5);
1302
1303 bfd_put_32 (input_bfd, opcode, hit_data);
1304 break;
1305 case R_METAG_GETSETOFF:
1306 case R_METAG_GETSET_GOT:
1307 case R_METAG_GETSET_GOTOFF:
1308 opcode = bfd_get_32 (input_bfd, hit_data);
1309
1310 srel = (bfd_signed_vma) relocation;
1311 srel += addend;
1312
1313 /* Is this a standard or extended GET/SET? */
1314 if ((opcode & 0xf0000000) == 0xa0000000)
1315 {
1316 /* Extended GET/SET. */
1317 l1 = opcode & 0x2;
1318 l2 = opcode & 0x4;
1319 op_extended = 1;
1320 }
1321 else
1322 {
1323 /* Standard GET/SET. */
1324 l1 = opcode & 0x01000000;
1325 l2 = opcode & 0x04000000;
1326 op_extended = 0;
1327 }
1328
1329 /* Calculate the width of the GET/SET and how much we need to
1330 shift the result by. */
1331 if (l2)
1332 if (l1)
1333 op_shift = 3;
1334 else
1335 op_shift = 2;
1336 else
1337 if (l1)
1338 op_shift = 1;
1339 else
1340 op_shift = 0;
1341
1342 /* GET/SET offsets are scaled by the width of the transfer. */
1343 srel = srel >> op_shift;
1344
1345 /* Extended GET/SET has signed 12 bits of offset, standard has
1346 signed 6 bits. */
1347 if (op_extended)
1348 {
1349 if (!within_signed_range (srel, 12))
1350 {
1351 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1352 srel = 0;
1353 else
1354 return bfd_reloc_overflow;
1355 }
1356 opcode &= ~(0xfff << 7);
1357 opcode |= ((srel & 0xfff) << 7);
1358 }
1359 else
1360 {
1361 if (!within_signed_range (srel, 5))
1362 {
1363 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1364 srel = 0;
1365 else
1366 return bfd_reloc_overflow;
1367 }
1368 opcode &= ~(0x3f << 8);
1369 opcode |= ((srel & 0x3f) << 8);
1370 }
1371
1372 bfd_put_32 (input_bfd, opcode, hit_data);
1373 break;
1374 case R_METAG_TLS_GD:
1375 case R_METAG_TLS_LDM:
1376 opcode = bfd_get_32 (input_bfd, hit_data);
1377
1378 if ((bfd_signed_vma)relocation < 0)
1379 {
1380 /* sign extend immediate */
1381 if ((opcode & 0xf2000001) == 0x02000000)
1382 {
1383 /* ADD De.e,Dx.r,#I16 */
1384 /* set SE bit */
1385 opcode |= (1 << 1);
1386 } else
1387 return bfd_reloc_overflow;
1388 }
1389
1390 bfd_put_32 (input_bfd, opcode, hit_data);
1391
1392 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1393 contents, rel->r_offset,
1394 relocation, rel->r_addend);
1395 break;
1396 default:
1397 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1398 contents, rel->r_offset,
1399 relocation, rel->r_addend);
1400 }
1401
1402 return r;
1403}
1404
1405/* This is defined because R_METAG_NONE != 0...
1406 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1407#define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1408 rel, relend, howto, contents) \
1409 { \
1410 _bfd_clear_contents (howto, input_bfd, input_section, \
1411 contents + rel->r_offset); \
1412 \
0e1862bb 1413 if (bfd_link_relocatable (info) \
a3c62988
NC		 1414 && (input_section->flags & SEC_DEBUGGING)) \
1415 { \
1416 /* Only remove relocations in debug sections since other \
1417 sections may require relocations. */ \
1418 Elf_Internal_Shdr *rel_hdr; \
1419 \
1420 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1421 \
1422 /* Avoid empty output section. */ \
1423 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1424 { \
1425 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1426 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1427 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1428 \
1429 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1430 \
1431 input_section->reloc_count--; \
1432 relend--; \
1433 rel--; \
1434 continue; \
1435 } \
1436 } \
1437 \
1438 rel->r_info = R_METAG_NONE; \
1439 rel->r_addend = 0; \
1440 continue; \
1441 }
1442
1443/* Relocate a META ELF section.
1444
1445The RELOCATE_SECTION function is called by the new ELF backend linker
1446to handle the relocations for a section.
1447
1448The relocs are always passed as Rela structures; if the section
1449actually uses Rel structures, the r_addend field will always be
1450zero.
1451
1452This function is responsible for adjusting the section contents as
1453necessary, and (if using Rela relocs and generating a relocatable
1454output file) adjusting the reloc addend as necessary.
1455
1456This function does not have to worry about setting the reloc
1457address or the reloc symbol index.
1458
1459LOCAL_SYMS is a pointer to the swapped in local symbols.
1460
1461LOCAL_SECTIONS is an array giving the section in the input file
1462corresponding to the st_shndx field of each local symbol.
1463
1464The global hash table entry for the global symbols can be found
1465via elf_sym_hashes (input_bfd).
1466
1467When generating relocatable output, this function must handle
1468STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1469going to be the section symbol corresponding to the output
1470section, which means that the addend must be adjusted
1471accordingly. */
1472
1473static bfd_boolean
1474elf_metag_relocate_section (bfd *output_bfd,
1475 struct bfd_link_info *info,
1476 bfd *input_bfd,
1477 asection *input_section,
1478 bfd_byte *contents,
1479 Elf_Internal_Rela *relocs,
1480 Elf_Internal_Sym *local_syms,
1481 asection **local_sections)
1482{
1483 bfd_vma *local_got_offsets;
1484 Elf_Internal_Shdr *symtab_hdr;
1485 struct elf_link_hash_entry **eh_syms;
1486 struct elf_metag_link_hash_table *htab;
1487 Elf_Internal_Rela *rel;
1488 Elf_Internal_Rela *relend;
1489 asection *sreloc;
1490
1491 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1492 eh_syms = elf_sym_hashes (input_bfd);
1493 relend = relocs + input_section->reloc_count;
1494
1495 htab = metag_link_hash_table (info);
1496 local_got_offsets = elf_local_got_offsets (input_bfd);
1497
1498 sreloc = NULL;
1499
1500 for (rel = relocs; rel < relend; rel ++)
1501 {
1502 reloc_howto_type *howto;
1503 unsigned long r_symndx;
1504 Elf_Internal_Sym *sym;
1505 asection *sec;
1506 struct elf_metag_link_hash_entry *hh;
1507 bfd_vma relocation;
1508 bfd_reloc_status_type r;
1509 const char *name;
1510 int r_type;
1511
1512 r_type = ELF32_R_TYPE (rel->r_info);
1513
1514 if (r_type == R_METAG_GNU_VTINHERIT
1515 || r_type == R_METAG_GNU_VTENTRY
1516 || r_type == R_METAG_NONE)
1517 continue;
1518
1519 r_symndx = ELF32_R_SYM (rel->r_info);
1520
1521 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1522 hh = NULL;
1523 sym = NULL;
1524 sec = NULL;
1525
1526 if (r_symndx < symtab_hdr->sh_info)
1527 {
1528 sym = local_syms + r_symndx;
1529 sec = local_sections [r_symndx];
1530 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1531
1532 name = bfd_elf_string_from_elf_section
1533 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1534 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1535 }
1536 else
1537 {
1538 struct elf_link_hash_entry *eh;
62d887d4 1539 bfd_boolean unresolved_reloc, warned, ignored;
a3c62988
NC		 1540
1541 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1542 r_symndx, symtab_hdr, eh_syms,
1543 eh, sec, relocation,
62d887d4 1544 unresolved_reloc, warned, ignored);
a3c62988
NC		 1545
1546 name = eh->root.root.string;
1547 hh = (struct elf_metag_link_hash_entry *) eh;
1548 }
1549
1550 if (sec != NULL && discarded_section (sec))
1551 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1552 rel, relend, howto, contents);
1553
0e1862bb 1554 if (bfd_link_relocatable (info))
a3c62988
NC		 1555 continue;
1556
1557 switch (r_type)
1558 {
1559 case R_METAG_ADDR32:
1560 case R_METAG_RELBRANCH:
1561 if ((input_section->flags & SEC_ALLOC) == 0)
1562 break;
1563
0e1862bb 1564 if ((bfd_link_pic (info)
a3c62988
NC		 1565 && r_symndx != STN_UNDEF
1566 && (input_section->flags & SEC_ALLOC) != 0
1567 && (r_type != R_METAG_RELBRANCH
1568 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
0e1862bb 1569 || (!bfd_link_pic (info)
a3c62988
NC		 1570 && hh != NULL
1571 && hh->eh.dynindx != -1
1572 && !hh->eh.non_got_ref
1573 && ((hh->eh.def_dynamic
1574 && !hh->eh.def_regular)
1575 || hh->eh.root.type == bfd_link_hash_undefweak
1576 || hh->eh.root.type == bfd_link_hash_undefined)))
1577 {
1578 Elf_Internal_Rela outrel;
1579 bfd_boolean skip, relocate;
1580 bfd_byte *loc;
1581
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1584 time. */
1585
1586 sreloc = elf_section_data (input_section)->sreloc;
1587 BFD_ASSERT (sreloc != NULL);
1588
1589 skip = FALSE;
1590 relocate = FALSE;
1591
1592 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1593 info,
1594 input_section,
1595 rel->r_offset);
1596 if (outrel.r_offset == (bfd_vma) -1)
1597 skip = TRUE;
1598 else if (outrel.r_offset == (bfd_vma) -2)
1599 skip = TRUE, relocate = TRUE;
1600 outrel.r_offset += (input_section->output_section->vma
1601 + input_section->output_offset);
1602
1603 if (skip)
1604 {
1605 memset (&outrel, 0, sizeof outrel);
1606 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1607 }
1608 else if (r_type == R_METAG_RELBRANCH)
1609 {
1610 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1611 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1612 outrel.r_addend = rel->r_addend;
1613 }
1614 else
1615 {
1616 /* h->dynindx may be -1 if this symbol was marked to
1617 become local. */
1618 if (hh == NULL
1619 || ((info->symbolic || hh->eh.dynindx == -1)
1620 && hh->eh.def_regular))
1621 {
1622 relocate = TRUE;
1623 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1624 outrel.r_addend = relocation + rel->r_addend;
1625 }
1626 else
1627 {
1628 BFD_ASSERT (hh->eh.dynindx != -1);
1629 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1630 outrel.r_addend = rel->r_addend;
1631 }
1632 }
1633
1634 loc = sreloc->contents;
1635 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1636 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1637 ++sreloc->reloc_count;
1638
1639 /* If this reloc is against an external symbol, we do
1640 not want to fiddle with the addend. Otherwise, we
1641 need to include the symbol value so that it becomes
1642 an addend for the dynamic reloc. */
1643 if (! relocate)
1644 continue;
1645 }
1646 break;
1647
1648 case R_METAG_RELBRANCH_PLT:
1649 /* Relocation is to the entry for this symbol in the
1650 procedure linkage table. */
1651
1652 if (hh == NULL)
1653 break;
1654
1655 if (hh->eh.forced_local)
1656 break;
1657
ce558b89 1658 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
a3c62988
NC		 1659 {
1660 /* We didn't make a PLT entry for this symbol. This
1661 happens when statically linking PIC code, or when
1662 using -Bsymbolic. */
1663 break;
1664 }
1665
ce558b89
AM		 1666 relocation = (htab->etab.splt->output_section->vma
1667 + htab->etab.splt->output_offset
a3c62988
NC		 1668 + hh->eh.plt.offset);
1669 break;
1670 case R_METAG_HI16_GOTPC:
1671 case R_METAG_LO16_GOTPC:
ce558b89 1672 BFD_ASSERT (htab->etab.sgot != NULL);
a3c62988 1673
ce558b89
AM		 1674 relocation = (htab->etab.sgot->output_section->vma +
1675 htab->etab.sgot->output_offset);
a3c62988
NC		 1676 relocation += GOT_REG_OFFSET;
1677 relocation -= (input_section->output_section->vma
1678 + input_section->output_offset
1679 + rel->r_offset);
1680 break;
1681 case R_METAG_HI16_GOTOFF:
1682 case R_METAG_LO16_GOTOFF:
1683 case R_METAG_GETSET_GOTOFF:
ce558b89 1684 BFD_ASSERT (htab->etab.sgot != NULL);
a3c62988 1685
ce558b89
AM		 1686 relocation -= (htab->etab.sgot->output_section->vma +
1687 htab->etab.sgot->output_offset);
a3c62988
NC		 1688 relocation -= GOT_REG_OFFSET;
1689 break;
1690 case R_METAG_GETSET_GOT:
1691 {
1692 bfd_vma off;
1693 bfd_boolean do_got = 0;
1694
1695 /* Relocation is to the entry for this symbol in the
1696 global offset table. */
1697 if (hh != NULL)
1698 {
1699 bfd_boolean dyn;
1700
1701 off = hh->eh.got.offset;
1702 dyn = htab->etab.dynamic_sections_created;
0e1862bb
L		 1703 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1704 bfd_link_pic (info),
a3c62988
NC		 1705 &hh->eh))
1706 {
1707 /* If we aren't going to call finish_dynamic_symbol,
1708 then we need to handle initialisation of the .got
1709 entry and create needed relocs here. Since the
1710 offset must always be a multiple of 4, we use the
1711 least significant bit to record whether we have
1712 initialised it already. */
1713 if ((off & 1) != 0)
1714 off &= ~1;
1715 else
1716 {
1717 hh->eh.got.offset |= 1;
1718 do_got = 1;
1719 }
1720 }
1721 }
1722 else
1723 {
1724 /* Local symbol case. */
1725 if (local_got_offsets == NULL)
1726 abort ();
1727
1728 off = local_got_offsets[r_symndx];
1729
1730 /* The offset must always be a multiple of 4. We use
1731 the least significant bit to record whether we have
1732 already generated the necessary reloc. */
1733 if ((off & 1) != 0)
1734 off &= ~1;
1735 else
1736 {
1737 local_got_offsets[r_symndx] |= 1;
1738 do_got = 1;
1739 }
1740 }
1741
1742 if (do_got)
1743 {
0e1862bb 1744 if (bfd_link_pic (info))
a3c62988
NC		 1745 {
1746 /* Output a dynamic relocation for this GOT entry.
1747 In this case it is relative to the base of the
1748 object because the symbol index is zero. */
1749 Elf_Internal_Rela outrel;
1750 bfd_byte *loc;
ce558b89 1751 asection *s = htab->etab.srelgot;
a3c62988
NC		 1752
1753 outrel.r_offset = (off
ce558b89
AM		 1754 + htab->etab.sgot->output_offset
1755 + htab->etab.sgot->output_section->vma);
a3c62988
NC		 1756 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1757 outrel.r_addend = relocation;
1758 loc = s->contents;
1759 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1760 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1761 }
1762 else
1763 bfd_put_32 (output_bfd, relocation,
ce558b89 1764 htab->etab.sgot->contents + off);
a3c62988
NC		 1765 }
1766
1767 if (off >= (bfd_vma) -2)
1768 abort ();
1769
1770 relocation = off - GOT_REG_OFFSET;
1771 }
1772 break;
1773 case R_METAG_TLS_GD:
1774 case R_METAG_TLS_IE:
1775 {
1776 /* XXXMJF There is room here for optimisations. For example
1777 converting from GD->IE, etc. */
1778 bfd_vma off;
1779 int indx;
1780 char tls_type;
1781
ce558b89 1782 if (htab->etab.sgot == NULL)
a3c62988
NC		 1783 abort();
1784
1785 indx = 0;
1786 if (hh != NULL)
1787 {
1788 bfd_boolean dyn;
1789 dyn = htab->etab.dynamic_sections_created;
1790
0e1862bb
L		 1791 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1792 bfd_link_pic (info),
1793 &hh->eh)
1794 && (!bfd_link_pic (info)
a3c62988
NC		 1795 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1796 {
1797 indx = hh->eh.dynindx;
1798 }
1799 off = hh->eh.got.offset;
1800 tls_type = hh->tls_type;
1801 }
1802 else
1803 {
1804 /* Local symbol case. */
1805 if (local_got_offsets == NULL)
1806 abort ();
1807
1808 off = local_got_offsets[r_symndx];
1809 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1810 }
1811
1812 if (tls_type == GOT_UNKNOWN)
6ec49e7c 1813 abort ();
a3c62988
NC		 1814
1815 if ((off & 1) != 0)
1816 off &= ~1;
1817 else
1818 {
1819 bfd_boolean need_relocs = FALSE;
1820 Elf_Internal_Rela outrel;
1821 bfd_byte *loc = NULL;
1822 int cur_off = off;
1823
1824 /* The GOT entries have not been initialized yet. Do it
1825 now, and emit any relocations. If both an IE GOT and a
1826 GD GOT are necessary, we emit the GD first. */
1827
0e1862bb 1828 if ((bfd_link_pic (info) || indx != 0)
a3c62988
NC		 1829 && (hh == NULL
1830 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1831 || hh->eh.root.type != bfd_link_hash_undefweak))
1832 {
1833 need_relocs = TRUE;
ce558b89 1834 loc = htab->etab.srelgot->contents;
a3c62988 1835 /* FIXME (CAO): Should this be reloc_count++ ? */
ce558b89 1836 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
a3c62988
NC		 1837 }
1838
1839 if (tls_type & GOT_TLS_GD)
1840 {
1841 if (need_relocs)
1842 {
1843 outrel.r_offset = (cur_off
ce558b89
AM		 1844 + htab->etab.sgot->output_section->vma
1845 + htab->etab.sgot->output_offset);
a3c62988
NC		 1846 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1847 outrel.r_addend = 0;
ce558b89 1848 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
a3c62988
NC		 1849
1850 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ce558b89 1851 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1852 loc += sizeof (Elf32_External_Rela);
1853
1854 if (indx == 0)
1855 bfd_put_32 (output_bfd, 0,
ce558b89 1856 htab->etab.sgot->contents + cur_off + 4);
a3c62988
NC		 1857 else
1858 {
1859 bfd_put_32 (output_bfd, 0,
ce558b89 1860 htab->etab.sgot->contents + cur_off + 4);
a3c62988
NC		 1861 outrel.r_info = ELF32_R_INFO (indx,
1862 R_METAG_TLS_DTPOFF);
1863 outrel.r_offset += 4;
1864 bfd_elf32_swap_reloca_out (output_bfd,
1865 &outrel, loc);
ce558b89 1866 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1867 loc += sizeof (Elf32_External_Rela);
1868 }
1869 }
1870 else
1871 {
1872 /* We don't support changing the TLS model. */
6ec49e7c
NC		 1873 /* PR 20675 */
1874 if (bfd_link_pic (info))
1875 _bfd_error_handler (_("%B(%A): multiple TLS models are not supported"),
d42c267e 1876 input_bfd, input_section);
6ec49e7c
NC		 1877 else
1878 _bfd_error_handler (_("%B(%A): shared library symbol %s encountered whilst performing a static link"),
1879 input_bfd, input_section, name);
1880 return FALSE;
a3c62988
NC		 1881 }
1882
1883 cur_off += 8;
1884 }
1885
1886 if (tls_type & GOT_TLS_IE)
1887 {
1888 if (need_relocs)
1889 {
1890 outrel.r_offset = (cur_off
ce558b89
AM		 1891 + htab->etab.sgot->output_section->vma
1892 + htab->etab.sgot->output_offset);
a3c62988
NC		 1893 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1894
1895 if (indx == 0)
1896 outrel.r_addend = relocation - dtpoff_base (info);
1897 else
1898 outrel.r_addend = 0;
1899
1900 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ce558b89 1901 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1902 loc += sizeof (Elf32_External_Rela);
1903 }
1904 else
1905 bfd_put_32 (output_bfd, tpoff (info, relocation),
ce558b89 1906 htab->etab.sgot->contents + cur_off);
a3c62988
NC		 1907
1908 cur_off += 4;
1909 }
1910
1911 if (hh != NULL)
1912 hh->eh.got.offset |= 1;
1913 else
1914 local_got_offsets[r_symndx] |= 1;
1915 }
1916
1917 /* Add the base of the GOT to the relocation value. */
1918 relocation = off - GOT_REG_OFFSET;
1919
1920 break;
1921 }
1922
1923 case R_METAG_TLS_IENONPIC_HI16:
1924 case R_METAG_TLS_IENONPIC_LO16:
1925 case R_METAG_TLS_LE_HI16:
1926 case R_METAG_TLS_LE_LO16:
0e1862bb 1927 if (bfd_link_pic (info))
a3c62988 1928 {
4eca0228 1929 _bfd_error_handler
695344c0 1930 /* xgettext:c-format */
d42c267e
AM		 1931 (_("%B(%A+%#Lx): %s relocation not permitted in shared object"),
1932 input_bfd, input_section, rel->r_offset, howto->name);
a3c62988
NC		 1933 return FALSE;
1934 }
1935 else
1936 relocation = tpoff (info, relocation);
1937 break;
1938 case R_METAG_TLS_LDO_HI16:
1939 case R_METAG_TLS_LDO_LO16:
0e1862bb 1940 if (! bfd_link_pic (info))
a3c62988
NC		 1941 relocation = tpoff (info, relocation);
1942 else
1943 relocation -= dtpoff_base (info);
1944 break;
1945 case R_METAG_TLS_LDM:
1946 {
1947 bfd_vma off;
1948
ce558b89 1949 if (htab->etab.sgot == NULL)
a3c62988
NC		 1950 abort();
1951 off = htab->tls_ldm_got.offset;
1952 if (off & 1)
1953 off &= ~1;
1954 else
1955 {
1956 Elf_Internal_Rela outrel;
1957 bfd_byte *loc;
1958
1959 outrel.r_offset = (off
ce558b89
AM		 1960 + htab->etab.sgot->output_section->vma
1961 + htab->etab.sgot->output_offset);
a3c62988
NC		 1962
1963 outrel.r_addend = 0;
1964 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
ce558b89
AM		 1965 loc = htab->etab.srelgot->contents;
1966 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
a3c62988
NC		 1967 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1968 htab->tls_ldm_got.offset |= 1;
1969 }
1970
1971 relocation = off - GOT_REG_OFFSET;
1972 break;
1973 }
1974 default:
1975 break;
1976 }
1977
1978 r = metag_final_link_relocate (howto, input_bfd, input_section,
1979 contents, rel, relocation, hh, htab,
1980 sec);
1981
1982 if (r != bfd_reloc_ok)
1983 {
1984 const char * msg = (const char *) NULL;
1985
1986 switch (r)
1987 {
1988 case bfd_reloc_overflow:
1a72702b 1989 (*info->callbacks->reloc_overflow)
a3c62988
NC		 1990 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1991 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1992 break;
1993
1994 case bfd_reloc_undefined:
1a72702b
AM		 1995 (*info->callbacks->undefined_symbol)
1996 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
a3c62988
NC		 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)
1a72702b
AM		 2017 (*info->callbacks->warning) (info, msg, name, input_bfd,
2018 input_section, rel->r_offset);
a3c62988
NC		 2019 }
2020 }
2021
2022 return TRUE;
2023}
2024
2025/* Create the .plt and .got sections, and set up our hash table
2026 short-cuts to various dynamic sections. */
2027
2028static bfd_boolean
2029elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2030{
2031 struct elf_metag_link_hash_table *htab;
2032 struct elf_link_hash_entry *eh;
2033 struct bfd_link_hash_entry *bh;
2034 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2035
2036 /* Don't try to create the .plt and .got twice. */
2037 htab = metag_link_hash_table (info);
ce558b89 2038 if (htab->etab.splt != NULL)
a3c62988
NC		 2039 return TRUE;
2040
2041 /* Call the generic code to do most of the work. */
2042 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2043 return FALSE;
2044
ce558b89
AM		 2045 /* The header goes at the start of the dynamic .got section, which
2046 is placed after the dynamic .got.plt section. ie. The header is
2047 not necessarily at the start of the output .got section. */
2048 htab->etab.sgot->size += 12;
a3c62988 2049
ce558b89 2050 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
a3c62988
NC		 2051 bh = NULL;
2052 if (!(_bfd_generic_link_add_one_symbol
ce558b89 2053 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot,
a3c62988
NC		 2054 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2055 return FALSE;
2056 eh = (struct elf_link_hash_entry *) bh;
2057 eh->def_regular = 1;
2058 eh->type = STT_OBJECT;
2059 eh->other = STV_HIDDEN;
2060
0e1862bb 2061 if (! bfd_link_executable (info)
a3c62988
NC		 2062 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2063 return FALSE;
2064
ce558b89 2065 htab->etab.hgot = eh;
a3c62988 2066
a3c62988
NC		 2067 return TRUE;
2068}
2069
2070/* Look through the relocs for a section during the first phase, and
2071 calculate needed space in the global offset table, procedure linkage
2072 table, and dynamic reloc sections. At this point we haven't
2073 necessarily read all the input files. */
2074
2075static bfd_boolean
2076elf_metag_check_relocs (bfd *abfd,
2077 struct bfd_link_info *info,
2078 asection *sec,
2079 const Elf_Internal_Rela *relocs)
2080{
2081 Elf_Internal_Shdr *symtab_hdr;
2082 struct elf_link_hash_entry **eh_syms;
2083 const Elf_Internal_Rela *rel;
2084 const Elf_Internal_Rela *rel_end;
2085 struct elf_metag_link_hash_table *htab;
2086 asection *sreloc;
2087 bfd *dynobj;
2088 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2089
0e1862bb 2090 if (bfd_link_relocatable (info))
a3c62988
NC		 2091 return TRUE;
2092
2093 htab = metag_link_hash_table (info);
2094 dynobj = htab->etab.dynobj;
2095 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2096 eh_syms = elf_sym_hashes (abfd);
2097 sreloc = NULL;
2098
2099 if (htab == NULL)
2100 return FALSE;
2101
2102 rel_end = relocs + sec->reloc_count;
2103 for (rel = relocs; rel < rel_end; rel++)
2104 {
2105 int r_type;
2106 struct elf_metag_link_hash_entry *hh;
1a18f0ae 2107 Elf_Internal_Sym *isym;
a3c62988
NC		 2108 unsigned long r_symndx;
2109
2110 r_symndx = ELF32_R_SYM (rel->r_info);
2111 r_type = ELF32_R_TYPE (rel->r_info);
2112 if (r_symndx < symtab_hdr->sh_info)
1a18f0ae
NC		 2113 {
2114 /* A local symbol. */
2115 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2116 abfd, r_symndx);
2117 if (isym == NULL)
2118 return FALSE;
2119
2120 hh = NULL;
2121 }
a3c62988
NC		 2122 else
2123 {
1a18f0ae
NC		 2124 isym = NULL;
2125
a3c62988
NC		 2126 hh = (struct elf_metag_link_hash_entry *)
2127 eh_syms[r_symndx - symtab_hdr->sh_info];
2128 while (hh->eh.root.type == bfd_link_hash_indirect
2129 || hh->eh.root.type == bfd_link_hash_warning)
2130 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
81fbe831
AM		 2131
2132 /* PR15323, ref flags aren't set for references in the same
2133 object. */
bc4e12de 2134 hh->eh.root.non_ir_ref_regular = 1;
a3c62988
NC		 2135 }
2136
2137 /* Some relocs require a global offset table. */
ce558b89 2138 if (htab->etab.sgot == NULL)
a3c62988
NC		 2139 {
2140 switch (r_type)
2141 {
2142 case R_METAG_TLS_GD:
2143 case R_METAG_TLS_LDM:
2144 case R_METAG_TLS_IE:
0e1862bb 2145 if (bfd_link_pic (info))
a3c62988
NC		 2146 info->flags |= DF_STATIC_TLS;
2147 /* Fall through. */
2148
2149 case R_METAG_HI16_GOTOFF:
2150 case R_METAG_LO16_GOTOFF:
2151 case R_METAG_GETSET_GOTOFF:
2152 case R_METAG_GETSET_GOT:
2153 case R_METAG_HI16_GOTPC:
2154 case R_METAG_LO16_GOTPC:
2155 if (dynobj == NULL)
2156 htab->etab.dynobj = dynobj = abfd;
2157 if (!elf_metag_create_dynamic_sections (dynobj, info))
2158 return FALSE;
2159 break;
2160
2161 default:
2162 break;
2163 }
2164 }
2165
2166 switch (r_type)
2167 {
2168 case R_METAG_TLS_IE:
2169 case R_METAG_TLS_GD:
2170 case R_METAG_GETSET_GOT:
2171 switch (r_type)
2172 {
2173 default:
2174 tls_type = GOT_NORMAL;
2175 break;
2176 case R_METAG_TLS_IE:
2177 tls_type = GOT_TLS_IE;
2178 break;
2179 case R_METAG_TLS_GD:
2180 tls_type = GOT_TLS_GD;
2181 break;
2182 }
2183
2184 if (hh != NULL)
2185 {
2186 hh->eh.got.refcount += 1;
2187 old_tls_type = hh->tls_type;
2188 }
2189 else
2190 {
2191 bfd_signed_vma *local_got_refcounts;
2192
2193 /* This is a global offset table entry for a local
2194 symbol. */
2195 local_got_refcounts = elf_local_got_refcounts (abfd);
2196 if (local_got_refcounts == NULL)
2197 {
2198 bfd_size_type size;
2199
2200 size = symtab_hdr->sh_info;
2201 size *= sizeof (bfd_signed_vma);
2202 /* Add in space to store the local GOT TLS types. */
2203 size += symtab_hdr->sh_info;
2204 local_got_refcounts = ((bfd_signed_vma *)
2205 bfd_zalloc (abfd, size));
2206 if (local_got_refcounts == NULL)
2207 return FALSE;
2208 elf_local_got_refcounts (abfd) = local_got_refcounts;
2209 memset (metag_elf_local_got_tls_type (abfd),
2210 GOT_UNKNOWN, symtab_hdr->sh_info);
2211 }
2212 local_got_refcounts[r_symndx] += 1;
2213 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2214 }
2215
2216 if (old_tls_type != tls_type)
2217 {
2218 if (hh != NULL)
2219 {
2220 hh->tls_type = tls_type;
2221 }
2222 else
2223 {
2224 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2225 }
2226 }
2227
2228 break;
2229
2230 case R_METAG_TLS_LDM:
2231 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2232 break;
2233
2234 case R_METAG_RELBRANCH_PLT:
2235 /* This symbol requires a procedure linkage table entry. We
2236 actually build the entry in adjust_dynamic_symbol,
2237 because this might be a case of linking PIC code without
2238 linking in any dynamic objects, in which case we don't
2239 need to generate a procedure linkage table after all. */
2240
2241 /* If this is a local symbol, we resolve it directly without
2242 creating a procedure linkage table entry. */
2243 if (hh == NULL)
2244 continue;
2245
2246 if (hh->eh.forced_local)
2247 break;
2248
2249 hh->eh.needs_plt = 1;
2250 hh->eh.plt.refcount += 1;
2251 break;
2252
a3c62988
NC		 2253 case R_METAG_HIADDR16:
2254 case R_METAG_LOADDR16:
1a18f0ae
NC		 2255 /* Let's help debug shared library creation. These relocs
2256 cannot be used in shared libs. Don't error out for
2257 sections we don't care about, such as debug sections or
2258 non-constant sections. */
0e1862bb 2259 if (bfd_link_pic (info)
1a18f0ae
NC		 2260 && (sec->flags & SEC_ALLOC) != 0
2261 && (sec->flags & SEC_READONLY) != 0)
2262 {
2263 const char *name;
2264
2265 if (hh)
2266 name = hh->eh.root.root.string;
2267 else
2268 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
4eca0228 2269 _bfd_error_handler
695344c0 2270 /* xgettext:c-format */
1a18f0ae
NC		 2271 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2272 abfd, elf_metag_howto_table[r_type].name, name);
2273 bfd_set_error (bfd_error_bad_value);
2274 return FALSE;
2275 }
2276
2277 /* Fall through. */
2278 case R_METAG_ADDR32:
a3c62988
NC		 2279 case R_METAG_RELBRANCH:
2280 case R_METAG_GETSETOFF:
0e1862bb 2281 if (hh != NULL && !bfd_link_pic (info))
a3c62988
NC		 2282 {
2283 hh->eh.non_got_ref = 1;
2284 hh->eh.plt.refcount += 1;
2285 }
2286
2287 /* If we are creating a shared library, and this is a reloc
2288 against a global symbol, or a non PC relative reloc
2289 against a local symbol, then we need to copy the reloc
2290 into the shared library. However, if we are linking with
2291 -Bsymbolic, we do not need to copy a reloc against a
2292 global symbol which is defined in an object we are
2293 including in the link (i.e., DEF_REGULAR is set). At
2294 this point we have not seen all the input files, so it is
2295 possible that DEF_REGULAR is not set now but will be set
2296 later (it is never cleared). We account for that
2297 possibility below by storing information in the
2298 dyn_relocs field of the hash table entry. A similar
2299 situation occurs when creating shared libraries and symbol
2300 visibility changes render the symbol local.
2301
2302 If on the other hand, we are creating an executable, we
2303 may need to keep relocations for symbols satisfied by a
2304 dynamic library if we manage to avoid copy relocs for the
2305 symbol. */
0e1862bb 2306 if ((bfd_link_pic (info)
a3c62988
NC		 2307 && (sec->flags & SEC_ALLOC) != 0
2308 && (r_type != R_METAG_RELBRANCH
2309 || (hh != NULL
2310 && (! info->symbolic
2311 || hh->eh.root.type == bfd_link_hash_defweak
2312 || !hh->eh.def_regular))))
0e1862bb 2313 || (!bfd_link_pic (info)
a3c62988
NC		 2314 && (sec->flags & SEC_ALLOC) != 0
2315 && hh != NULL
2316 && (hh->eh.root.type == bfd_link_hash_defweak
2317 || !hh->eh.def_regular)))
2318 {
2319 struct elf_metag_dyn_reloc_entry *hdh_p;
2320 struct elf_metag_dyn_reloc_entry **hdh_head;
2321
2322 if (dynobj == NULL)
2323 htab->etab.dynobj = dynobj = abfd;
2324
2325 /* When creating a shared object, we must copy these
2326 relocs into the output file. We create a reloc
2327 section in dynobj and make room for the reloc. */
2328 if (sreloc == NULL)
2329 {
2330 sreloc = _bfd_elf_make_dynamic_reloc_section
2331 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2332
2333 if (sreloc == NULL)
2334 {
2335 bfd_set_error (bfd_error_bad_value);
2336 return FALSE;
2337 }
2338
2339 elf_section_data (sec)->sreloc = sreloc;
2340 }
2341
2342 /* If this is a global symbol, we count the number of
2343 relocations we need for this symbol. */
2344 if (hh != NULL)
2345 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2346 else
2347 {
2348 /* Track dynamic relocs needed for local syms too. */
2349 asection *sr;
2350 void *vpp;
a3c62988
NC		 2351
2352 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2353 if (sr == NULL)
2354 sr = sec;
2355
2356 vpp = &elf_section_data (sr)->local_dynrel;
2357 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2358 }
2359
2360 hdh_p = *hdh_head;
2361 if (hdh_p == NULL || hdh_p->sec != sec)
2362 {
2363 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2364 bfd_alloc (dynobj, sizeof *hdh_p));
2365 if (hdh_p == NULL)
2366 return FALSE;
2367 hdh_p->hdh_next = *hdh_head;
2368 *hdh_head = hdh_p;
2369 hdh_p->sec = sec;
2370 hdh_p->count = 0;
2371 hdh_p->relative_count = 0;
2372 }
2373
2374 hdh_p->count += 1;
2375 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2376 hdh_p->relative_count += 1;
2377 }
2378 break;
2379
2380 /* This relocation describes the C++ object vtable hierarchy.
2381 Reconstruct it for later use during GC. */
2382 case R_METAG_GNU_VTINHERIT:
2383 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2384 rel->r_offset))
2385 return FALSE;
2386 break;
2387
2388 /* This relocation describes which C++ vtable entries are actually
2389 used. Record for later use during GC. */
2390 case R_METAG_GNU_VTENTRY:
2391 BFD_ASSERT (hh != NULL);
2392 if (hh != NULL
2393 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2394 return FALSE;
2395 break;
2396 }
2397 }
2398
2399 return TRUE;
2400}
2401
2402/* Copy the extra info we tack onto an elf_link_hash_entry. */
2403
2404static void
2405elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2406 struct elf_link_hash_entry *eh_dir,
2407 struct elf_link_hash_entry *eh_ind)
2408{
2409 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2410
2411 hh_dir = metag_elf_hash_entry (eh_dir);
2412 hh_ind = metag_elf_hash_entry (eh_ind);
2413
2414 if (hh_ind->dyn_relocs != NULL)
2415 {
2416 if (hh_dir->dyn_relocs != NULL)
2417 {
2418 struct elf_metag_dyn_reloc_entry **hdh_pp;
2419 struct elf_metag_dyn_reloc_entry *hdh_p;
2420
2421 if (eh_ind->root.type == bfd_link_hash_indirect)
2422 abort ();
2423
2424 /* Add reloc counts against the weak sym to the strong sym
2425 list. Merge any entries against the same section. */
2426 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2427 {
2428 struct elf_metag_dyn_reloc_entry *hdh_q;
2429
2430 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2431 hdh_q = hdh_q->hdh_next)
2432 if (hdh_q->sec == hdh_p->sec)
2433 {
2434 hdh_q->relative_count += hdh_p->relative_count;
2435 hdh_q->count += hdh_p->count;
2436 *hdh_pp = hdh_p->hdh_next;
2437 break;
2438 }
2439 if (hdh_q == NULL)
2440 hdh_pp = &hdh_p->hdh_next;
2441 }
2442 *hdh_pp = hh_dir->dyn_relocs;
2443 }
2444
2445 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2446 hh_ind->dyn_relocs = NULL;
2447 }
2448
2449 if (eh_ind->root.type == bfd_link_hash_indirect
2450 && eh_dir->got.refcount <= 0)
2451 {
2452 hh_dir->tls_type = hh_ind->tls_type;
2453 hh_ind->tls_type = GOT_UNKNOWN;
2454 }
2455
2456 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2457}
2458
2459/* Adjust a symbol defined by a dynamic object and referenced by a
2460 regular object. The current definition is in some section of the
2461 dynamic object, but we're not including those sections. We have to
2462 change the definition to something the rest of the link can
2463 understand. */
2464
2465static bfd_boolean
2466elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2467 struct elf_link_hash_entry *eh)
2468{
2469 struct elf_metag_link_hash_table *htab;
2470 struct elf_metag_link_hash_entry *hh;
2471 struct elf_metag_dyn_reloc_entry *hdh_p;
5474d94f 2472 asection *s, *srel;
a3c62988
NC		 2473
2474 /* If this is a function, put it in the procedure linkage table. We
2475 will fill in the contents of the procedure linkage table later,
2476 when we know the address of the .got section. */
2477 if (eh->type == STT_FUNC
2478 || eh->needs_plt)
2479 {
2480 if (eh->plt.refcount <= 0
2481 || SYMBOL_CALLS_LOCAL (info, eh)
2482 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2483 && eh->root.type == bfd_link_hash_undefweak))
2484 {
2485 /* This case can occur if we saw a PLT reloc in an input
2486 file, but the symbol was never referred to by a dynamic
2487 object. In such a case, we don't actually need to build
2488 a procedure linkage table, and we can just do a PCREL
2489 reloc instead. */
2490 eh->plt.offset = (bfd_vma) -1;
2491 eh->needs_plt = 0;
2492 }
2493
2494 return TRUE;
2495 }
2496 else
2497 eh->plt.offset = (bfd_vma) -1;
2498
2499 /* If this is a weak symbol, and there is a real definition, the
2500 processor independent code will have arranged for us to see the
2501 real definition first, and we can just use the same value. */
2502 if (eh->u.weakdef != NULL)
2503 {
2504 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2505 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2506 abort ();
2507 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2508 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2509 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2510 return TRUE;
2511 }
2512
2513 /* This is a reference to a symbol defined by a dynamic object which
2514 is not a function. */
2515
2516 /* If we are creating a shared library, we must presume that the
2517 only references to the symbol are via the global offset table.
2518 For such cases we need not do anything here; the relocations will
2519 be handled correctly by relocate_section. */
0e1862bb 2520 if (bfd_link_pic (info))
a3c62988
NC		 2521 return TRUE;
2522
2523 /* If there are no references to this symbol that do not use the
2524 GOT, we don't need to generate a copy reloc. */
2525 if (!eh->non_got_ref)
2526 return TRUE;
2527
2528 /* If -z nocopyreloc was given, we won't generate them either. */
2529 if (info->nocopyreloc)
2530 {
2531 eh->non_got_ref = 0;
2532 return TRUE;
2533 }
2534
2535 hh = (struct elf_metag_link_hash_entry *) eh;
2536 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2537 {
2538 s = hdh_p->sec->output_section;
2539 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2540 break;
2541 }
2542
2543 /* If we didn't find any dynamic relocs in read-only sections, then
2544 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2545 if (hdh_p == NULL)
2546 {
2547 eh->non_got_ref = 0;
2548 return TRUE;
2549 }
2550
a3c62988
NC		 2551 /* We must allocate the symbol in our .dynbss section, which will
2552 become part of the .bss section of the executable. There will be
2553 an entry for this symbol in the .dynsym section. The dynamic
2554 object will contain position independent code, so all references
2555 from the dynamic object to this symbol will go through the global
2556 offset table. The dynamic linker will use the .dynsym entry to
2557 determine the address it must put in the global offset table, so
2558 both the dynamic object and the regular object will refer to the
2559 same memory location for the variable. */
2560
2561 htab = metag_link_hash_table (info);
2562
2563 /* We must generate a COPY reloc to tell the dynamic linker to
2564 copy the initial value out of the dynamic object and into the
2565 runtime process image. */
5474d94f
AM		 2566 if ((eh->root.u.def.section->flags & SEC_READONLY) != 0)
2567 {
2568 s = htab->etab.sdynrelro;
2569 srel = htab->etab.sreldynrelro;
2570 }
2571 else
2572 {
2573 s = htab->etab.sdynbss;
2574 srel = htab->etab.srelbss;
2575 }
34c67f14 2576 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
a3c62988 2577 {
5474d94f 2578 srel->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2579 eh->needs_copy = 1;
2580 }
2581
6cabe1ea 2582 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
a3c62988
NC		 2583}
2584
2585/* Allocate space in .plt, .got and associated reloc sections for
2586 global syms. */
2587
2588static bfd_boolean
2589allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2590{
2591 struct bfd_link_info *info;
2592 struct elf_metag_link_hash_table *htab;
2593 struct elf_metag_link_hash_entry *hh;
2594 struct elf_metag_dyn_reloc_entry *hdh_p;
2595
2596 if (eh->root.type == bfd_link_hash_indirect)
2597 return TRUE;
2598
2599 if (eh->root.type == bfd_link_hash_warning)
2600 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2601
2602 info = inf;
2603 htab = metag_link_hash_table (info);
2604
2605 if (htab->etab.dynamic_sections_created
2606 && eh->plt.refcount > 0)
2607 {
2608 /* Make sure this symbol is output as a dynamic symbol.
2609 Undefined weak syms won't yet be marked as dynamic. */
2610 if (eh->dynindx == -1
2611 && !eh->forced_local)
2612 {
2613 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2614 return FALSE;
2615 }
2616
0e1862bb 2617 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
a3c62988 2618 {
ce558b89 2619 asection *s = htab->etab.splt;
a3c62988
NC		 2620
2621 /* If this is the first .plt entry, make room for the special
2622 first entry. */
2623 if (s->size == 0)
2624 s->size += PLT_ENTRY_SIZE;
2625
2626 eh->plt.offset = s->size;
2627
2628 /* If this symbol is not defined in a regular file, and we are
2629 not generating a shared library, then set the symbol to this
2630 location in the .plt. This is required to make function
2631 pointers compare as equal between the normal executable and
2632 the shared library. */
0e1862bb 2633 if (! bfd_link_pic (info)
a3c62988
NC		 2634 && !eh->def_regular)
2635 {
2636 eh->root.u.def.section = s;
2637 eh->root.u.def.value = eh->plt.offset;
2638 }
2639
2640 /* Make room for this entry. */
2641 s->size += PLT_ENTRY_SIZE;
2642
2643 /* We also need to make an entry in the .got.plt section, which
2644 will be placed in the .got section by the linker script. */
ce558b89 2645 htab->etab.sgotplt->size += 4;
a3c62988
NC		 2646
2647 /* We also need to make an entry in the .rel.plt section. */
ce558b89 2648 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2649 }
2650 else
2651 {
2652 eh->plt.offset = (bfd_vma) -1;
2653 eh->needs_plt = 0;
2654 }
2655 }
2656 else
2657 {
2658 eh->plt.offset = (bfd_vma) -1;
2659 eh->needs_plt = 0;
2660 }
2661
2662 if (eh->got.refcount > 0)
2663 {
2664 asection *s;
2665 bfd_boolean dyn;
2666 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2667
2668 /* Make sure this symbol is output as a dynamic symbol.
2669 Undefined weak syms won't yet be marked as dynamic. */
2670 if (eh->dynindx == -1
2671 && !eh->forced_local)
2672 {
2673 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2674 return FALSE;
2675 }
2676
ce558b89 2677 s = htab->etab.sgot;
a3c62988
NC		 2678
2679 eh->got.offset = s->size;
2680 s->size += 4;
2681 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2682 if (tls_type == GOT_TLS_GD)
2683 s->size += 4;
2684 dyn = htab->etab.dynamic_sections_created;
2685 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2686 R_METAG_TLS_GD needs one if local symbol and two if global. */
2687 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2688 || (tls_type == GOT_TLS_IE && dyn))
ce558b89 2689 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988 2690 else if (tls_type == GOT_TLS_GD)
ce558b89 2691 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
0e1862bb
L		 2692 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2693 bfd_link_pic (info),
2694 eh))
ce558b89 2695 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2696 }
2697 else
2698 eh->got.offset = (bfd_vma) -1;
2699
2700 hh = (struct elf_metag_link_hash_entry *) eh;
2701 if (hh->dyn_relocs == NULL)
2702 return TRUE;
2703
2704 /* If this is a -Bsymbolic shared link, then we need to discard all
2705 space allocated for dynamic pc-relative relocs against symbols
2706 defined in a regular object. For the normal shared case, discard
2707 space for relocs that have become local due to symbol visibility
2708 changes. */
0e1862bb 2709 if (bfd_link_pic (info))
a3c62988
NC		 2710 {
2711 if (SYMBOL_CALLS_LOCAL (info, eh))
2712 {
2713 struct elf_metag_dyn_reloc_entry **hdh_pp;
2714
2715 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2716 {
2717 hdh_p->count -= hdh_p->relative_count;
2718 hdh_p->relative_count = 0;
2719 if (hdh_p->count == 0)
2720 *hdh_pp = hdh_p->hdh_next;
2721 else
2722 hdh_pp = &hdh_p->hdh_next;
2723 }
2724 }
2725
2726 /* Also discard relocs on undefined weak syms with non-default
2727 visibility. */
2728 if (hh->dyn_relocs != NULL
2729 && eh->root.type == bfd_link_hash_undefweak)
2730 {
2731 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2732 hh->dyn_relocs = NULL;
2733
2734 /* Make sure undefined weak symbols are output as a dynamic
2735 symbol in PIEs. */
2736 else if (eh->dynindx == -1
2737 && !eh->forced_local)
2738 {
2739 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2740 return FALSE;
2741 }
2742 }
2743 }
2744 else
2745 {
2746 /* For the non-shared case, discard space for relocs against
2747 symbols which turn out to need copy relocs or are not
2748 dynamic. */
2749 if (!eh->non_got_ref
2750 && ((eh->def_dynamic
2751 && !eh->def_regular)
2752 || (htab->etab.dynamic_sections_created
2753 && (eh->root.type == bfd_link_hash_undefweak
2754 || eh->root.type == bfd_link_hash_undefined))))
2755 {
2756 /* Make sure this symbol is output as a dynamic symbol.
2757 Undefined weak syms won't yet be marked as dynamic. */
2758 if (eh->dynindx == -1
2759 && !eh->forced_local)
2760 {
2761 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2762 return FALSE;
2763 }
2764
2765 /* If that succeeded, we know we'll be keeping all the
2766 relocs. */
2767 if (eh->dynindx != -1)
2768 goto keep;
2769 }
2770
2771 hh->dyn_relocs = NULL;
2772 return TRUE;
2773
2774 keep: ;
2775 }
2776
2777 /* Finally, allocate space. */
2778 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2779 {
2780 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2781 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2782 }
2783
2784 return TRUE;
2785}
2786
2787/* Find any dynamic relocs that apply to read-only sections. */
2788
2789static bfd_boolean
2790readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2791{
2792 struct elf_metag_link_hash_entry *hh;
2793 struct elf_metag_dyn_reloc_entry *hdh_p;
2794
2795 if (eh->root.type == bfd_link_hash_warning)
2796 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2797
2798 hh = (struct elf_metag_link_hash_entry *) eh;
2799 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2800 {
2801 asection *s = hdh_p->sec->output_section;
2802
2803 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2804 {
2805 struct bfd_link_info *info = inf;
2806
2807 info->flags |= DF_TEXTREL;
2808
2809 /* Not an error, just cut short the traversal. */
2810 return FALSE;
2811 }
2812 }
2813 return TRUE;
2814}
2815
2816/* Set the sizes of the dynamic sections. */
2817
2818static bfd_boolean
2819elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2820 struct bfd_link_info *info)
2821{
2822 struct elf_metag_link_hash_table *htab;
2823 bfd *dynobj;
2824 bfd *ibfd;
2825 asection *s;
2826 bfd_boolean relocs;
2827
2828 htab = metag_link_hash_table (info);
2829 dynobj = htab->etab.dynobj;
2830 if (dynobj == NULL)
2831 abort ();
2832
2833 if (htab->etab.dynamic_sections_created)
2834 {
2835 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 2836 if (bfd_link_executable (info) && !info->nointerp)
a3c62988 2837 {
ad1fc92a 2838 s = bfd_get_linker_section (dynobj, ".interp");
a3c62988
NC		 2839 if (s == NULL)
2840 abort ();
2841 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2842 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2843 }
2844 }
2845
2846 /* Set up .got offsets for local syms, and space for local dynamic
2847 relocs. */
c72f2fb2 2848 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
a3c62988
NC		 2849 {
2850 bfd_signed_vma *local_got;
2851 bfd_signed_vma *end_local_got;
2852 bfd_size_type locsymcount;
2853 Elf_Internal_Shdr *symtab_hdr;
2854 asection *srel;
2855 char *local_tls_type;
2856
2857 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2858 continue;
2859
2860 for (s = ibfd->sections; s != NULL; s = s->next)
2861 {
2862 struct elf_metag_dyn_reloc_entry *hdh_p;
2863
2864 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2865 elf_section_data (s)->local_dynrel);
2866 hdh_p != NULL;
2867 hdh_p = hdh_p->hdh_next)
2868 {
2869 if (!bfd_is_abs_section (hdh_p->sec)
2870 && bfd_is_abs_section (hdh_p->sec->output_section))
2871 {
2872 /* Input section has been discarded, either because
2873 it is a copy of a linkonce section or due to
2874 linker script /DISCARD/, so we'll be discarding
2875 the relocs too. */
2876 }
2877 else if (hdh_p->count != 0)
2878 {
2879 srel = elf_section_data (hdh_p->sec)->sreloc;
2880 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2881 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2882 info->flags |= DF_TEXTREL;
2883 }
2884 }
2885 }
2886
2887 local_got = elf_local_got_refcounts (ibfd);
2888 if (!local_got)
2889 continue;
2890
2891 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2892 locsymcount = symtab_hdr->sh_info;
2893 end_local_got = local_got + locsymcount;
2894 local_tls_type = metag_elf_local_got_tls_type (ibfd);
ce558b89
AM		 2895 s = htab->etab.sgot;
2896 srel = htab->etab.srelgot;
a3c62988
NC		 2897 for (; local_got < end_local_got; ++local_got)
2898 {
2899 if (*local_got > 0)
2900 {
2901 *local_got = s->size;
2902 s->size += GOT_ENTRY_SIZE;
2903 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2904 if (*local_tls_type == GOT_TLS_GD)
2905 s->size += 4;
0e1862bb 2906 if (bfd_link_pic (info))
a3c62988
NC		 2907 srel->size += sizeof (Elf32_External_Rela);
2908 }
2909 else
2910 *local_got = (bfd_vma) -1;
2911 ++local_tls_type;
2912 }
2913 }
2914
2915 if (htab->tls_ldm_got.refcount > 0)
2916 {
2917 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2918 reloc. */
ce558b89
AM		 2919 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2920 htab->etab.sgot->size += 8;
2921 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2922 }
2923 else
2924 htab->tls_ldm_got.offset = -1;
2925
2926 /* Allocate global sym .plt and .got entries, and space for global
2927 sym dynamic relocs. */
2928 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2929
2930 /* We now have determined the sizes of the various dynamic sections.
2931 Allocate memory for them. */
2932 relocs = FALSE;
2933 for (s = dynobj->sections; s != NULL; s = s->next)
2934 {
2935 bfd_boolean reloc_section = FALSE;
2936
2937 if ((s->flags & SEC_LINKER_CREATED) == 0)
2938 continue;
2939
ce558b89
AM		 2940 if (s == htab->etab.splt
2941 || s == htab->etab.sgot
2942 || s == htab->etab.sgotplt
5474d94f
AM		 2943 || s == htab->etab.sdynbss
2944 || s == htab->etab.sdynrelro)
a3c62988
NC		 2945 {
2946 /* Strip this section if we don't need it; see the
2947 comment below. */
2948 }
2949 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2950 {
ce558b89 2951 if (s->size != 0 && s != htab->etab.srelplt)
a3c62988
NC		 2952 relocs = TRUE;
2953
2954 /* We use the reloc_count field as a counter if we need
2955 to copy relocs into the output file. */
2956 s->reloc_count = 0;
2957 reloc_section = TRUE;
2958 }
2959 else
2960 {
2961 /* It's not one of our sections, so don't allocate space. */
2962 continue;
2963 }
2964
2965 if (s->size == 0)
2966 {
2967 /* If we don't need this section, strip it from the
2968 output file. This is mostly to handle .rela.bss and
2969 .rela.plt. We must create both sections in
2970 create_dynamic_sections, because they must be created
2971 before the linker maps input sections to output
2972 sections. The linker does that before
2973 adjust_dynamic_symbol is called, and it is that
2974 function which decides whether anything needs to go
2975 into these sections. */
2976 s->flags |= SEC_EXCLUDE;
2977 continue;
2978 }
2979
2980 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2981 continue;
2982
2983 /* Allocate memory for the section contents. */
2984 s->contents = bfd_zalloc (dynobj, s->size);
2985 if (s->contents == NULL)
2986 return FALSE;
2987 else if (reloc_section)
2988 {
2989 unsigned char *contents = s->contents;
2990 Elf32_External_Rela reloc;
2991
2992 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2993 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2994 reloc.r_info[0] = R_METAG_NONE;
2995 for (; contents < (s->contents + s->size);
2996 contents += sizeof(Elf32_External_Rela))
2997 {
2998 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
2999 }
3000 }
3001 }
3002
3003 if (htab->etab.dynamic_sections_created)
3004 {
3005 /* Add some entries to the .dynamic section. We fill in the
3006 values later, in elf_metag_finish_dynamic_sections, but we
3007 must add the entries now so that we get the correct size for
3008 the .dynamic section. The DT_DEBUG entry is filled in by the
3009 dynamic linker and used by the debugger. */
3010#define add_dynamic_entry(TAG, VAL) \
3011 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3012
3013 if (!add_dynamic_entry (DT_PLTGOT, 0))
3014 return FALSE;
3015
0e1862bb 3016 if (bfd_link_executable (info))
a3c62988
NC		 3017 {
3018 if (!add_dynamic_entry (DT_DEBUG, 0))
3019 return FALSE;
3020 }
3021
ce558b89 3022 if (htab->etab.srelplt->size != 0)
a3c62988
NC		 3023 {
3024 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3025 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3026 || !add_dynamic_entry (DT_JMPREL, 0))
3027 return FALSE;
3028 }
3029
3030 if (relocs)
3031 {
3032 if (!add_dynamic_entry (DT_RELA, 0)
3033 || !add_dynamic_entry (DT_RELASZ, 0)
3034 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3035 return FALSE;
3036
3037 /* If any dynamic relocs apply to a read-only section,
3038 then we need a DT_TEXTREL entry. */
3039 if ((info->flags & DF_TEXTREL) == 0)
3040 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3041
3042 if ((info->flags & DF_TEXTREL) != 0)
3043 {
3044 if (!add_dynamic_entry (DT_TEXTREL, 0))
3045 return FALSE;
3046 }
3047 }
3048 }
3049#undef add_dynamic_entry
3050
3051 return TRUE;
3052}
3053
3054/* Finish up dynamic symbol handling. We set the contents of various
3055 dynamic sections here. */
3056
3057static bfd_boolean
3058elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3059 struct bfd_link_info *info,
3060 struct elf_link_hash_entry *eh,
3061 Elf_Internal_Sym *sym)
3062{
3063 struct elf_metag_link_hash_table *htab;
3064 Elf_Internal_Rela rel;
3065 bfd_byte *loc;
3066
3067 htab = metag_link_hash_table (info);
3068
3069 if (eh->plt.offset != (bfd_vma) -1)
3070 {
3071 asection *splt;
3072 asection *sgot;
3073 asection *srela;
3074
3075 bfd_vma plt_index;
3076 bfd_vma got_offset;
3077 bfd_vma got_entry;
3078
3079 if (eh->plt.offset & 1)
3080 abort ();
3081
3082 BFD_ASSERT (eh->dynindx != -1);
3083
ce558b89
AM		 3084 splt = htab->etab.splt;
3085 sgot = htab->etab.sgotplt;
3086 srela = htab->etab.srelplt;
a3c62988
NC		 3087 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3088
3089 /* Get the index in the procedure linkage table which
3090 corresponds to this symbol. This is the index of this symbol
3091 in all the symbols for which we are making plt entries. The
3092 first entry in the procedure linkage table is reserved. */
3093 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3094
3095 /* Get the offset into the .got.plt table of the entry that
3096 corresponds to this function. */
3097 got_offset = plt_index * GOT_ENTRY_SIZE;
3098
3099 BFD_ASSERT (got_offset < (1 << 16));
3100
3101 got_entry = sgot->output_section->vma
3102 + sgot->output_offset
3103 + got_offset;
3104
3105 BFD_ASSERT (plt_index < (1 << 16));
3106
3107 /* Fill in the entry in the procedure linkage table. */
0e1862bb 3108 if (! bfd_link_pic (info))
a3c62988
NC		 3109 {
3110 bfd_put_32 (output_bfd,
3111 (plt_entry[0]
3112 | (((got_entry >> 16) & 0xffff) << 3)),
3113 splt->contents + eh->plt.offset);
3114 bfd_put_32 (output_bfd,
3115 (plt_entry[1]
3116 | ((got_entry & 0xffff) << 3)),
3117 splt->contents + eh->plt.offset + 4);
3118 bfd_put_32 (output_bfd, plt_entry[2],
3119 splt->contents + eh->plt.offset + 8);
3120 bfd_put_32 (output_bfd,
3121 (plt_entry[3] | (plt_index << 3)),
3122 splt->contents + eh->plt.offset + 12);
3123 bfd_put_32 (output_bfd,
3124 (plt_entry[4]
3125 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3126 splt->contents + eh->plt.offset + 16);
3127 }
3128 else
3129 {
3130 bfd_vma addr = got_entry - (splt->output_section->vma +
3131 splt->output_offset + eh->plt.offset);
3132
3133 bfd_put_32 (output_bfd,
3134 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3135 splt->contents + eh->plt.offset);
3136 bfd_put_32 (output_bfd,
3137 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3138 splt->contents + eh->plt.offset + 4);
3139 bfd_put_32 (output_bfd, plt_pic_entry[2],
3140 splt->contents + eh->plt.offset + 8);
3141 bfd_put_32 (output_bfd,
3142 (plt_pic_entry[3] | (plt_index << 3)),
3143 splt->contents + eh->plt.offset + 12);
3144 bfd_put_32 (output_bfd,
3145 (plt_pic_entry[4]
3146 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3147 splt->contents + eh->plt.offset + 16);
3148 }
3149
3150 /* Fill in the entry in the global offset table. */
3151 bfd_put_32 (output_bfd,
3152 (splt->output_section->vma
3153 + splt->output_offset
3154 + eh->plt.offset
3155 + 12), /* offset within PLT entry */
3156 sgot->contents + got_offset);
3157
3158 /* Fill in the entry in the .rela.plt section. */
3159 rel.r_offset = (sgot->output_section->vma
3160 + sgot->output_offset
3161 + got_offset);
3162 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3163 rel.r_addend = 0;
ce558b89 3164 loc = htab->etab.srelplt->contents;
a3c62988
NC		 3165 loc += plt_index * sizeof(Elf32_External_Rela);
3166 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3167
3168 if (!eh->def_regular)
3169 {
3170 /* Mark the symbol as undefined, rather than as defined in
3171 the .plt section. Leave the value alone. */
3172 sym->st_shndx = SHN_UNDEF;
3173 }
3174 }
3175
3176 if (eh->got.offset != (bfd_vma) -1
3177 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3178 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3179 {
3180 /* This symbol has an entry in the global offset table. Set it
3181 up. */
3182
3183 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
ce558b89
AM		 3184 + htab->etab.sgot->output_offset
3185 + htab->etab.sgot->output_section->vma);
a3c62988
NC		 3186
3187 /* If this is a -Bsymbolic link and the symbol is defined
3188 locally or was forced to be local because of a version file,
3189 we just want to emit a RELATIVE reloc. The entry in the
3190 global offset table will already have been initialized in the
3191 relocate_section function. */
0e1862bb 3192 if (bfd_link_pic (info)
a3c62988
NC		 3193 && (info->symbolic || eh->dynindx == -1)
3194 && eh->def_regular)
3195 {
3196 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3197 rel.r_addend = (eh->root.u.def.value
3198 + eh->root.u.def.section->output_offset
3199 + eh->root.u.def.section->output_section->vma);
3200 }
3201 else
3202 {
3203 if ((eh->got.offset & 1) != 0)
3204 abort ();
ce558b89 3205 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset);
a3c62988
NC		 3206 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3207 rel.r_addend = 0;
3208 }
3209
ce558b89
AM		 3210 loc = htab->etab.srelgot->contents;
3211 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
a3c62988
NC		 3212 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3213 }
3214
3215 if (eh->needs_copy)
3216 {
3217 asection *s;
3218
3219 /* This symbol needs a copy reloc. Set it up. */
3220
3221 if (! (eh->dynindx != -1
3222 && (eh->root.type == bfd_link_hash_defined
3223 || eh->root.type == bfd_link_hash_defweak)))
3224 abort ();
3225
a3c62988
NC		 3226 rel.r_offset = (eh->root.u.def.value
3227 + eh->root.u.def.section->output_offset
3228 + eh->root.u.def.section->output_section->vma);
3229 rel.r_addend = 0;
3230 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
afbf7e8e 3231 if (eh->root.u.def.section == htab->etab.sdynrelro)
5474d94f
AM		 3232 s = htab->etab.sreldynrelro;
3233 else
3234 s = htab->etab.srelbss;
a3c62988
NC		 3235 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3236 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3237 }
3238
3239 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3240 if (eh->root.root.string[0] == '_'
3241 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3242 || eh == htab->etab.hgot))
3243 {
3244 sym->st_shndx = SHN_ABS;
3245 }
3246
3247 return TRUE;
3248}
3249
3250/* Set the Meta ELF ABI version. */
3251
3252static void
df3ce959 3253elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
a3c62988
NC		 3254{
3255 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3256
df3ce959 3257 _bfd_elf_post_process_headers (abfd, link_info);
a3c62988
NC		 3258 i_ehdrp = elf_elfheader (abfd);
3259 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3260}
3261
3262/* Used to decide how to sort relocs in an optimal manner for the
3263 dynamic linker, before writing them out. */
3264
3265static enum elf_reloc_type_class
7e612e98
AM		 3266elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3267 const asection *rel_sec ATTRIBUTE_UNUSED,
3268 const Elf_Internal_Rela *rela)
a3c62988
NC		 3269{
3270 switch ((int) ELF32_R_TYPE (rela->r_info))
3271 {
3272 case R_METAG_RELATIVE:
3273 return reloc_class_relative;
3274 case R_METAG_JMP_SLOT:
3275 return reloc_class_plt;
3276 case R_METAG_COPY:
3277 return reloc_class_copy;
3278 default:
3279 return reloc_class_normal;
3280 }
3281}
3282
3283/* Finish up the dynamic sections. */
3284
3285static bfd_boolean
3286elf_metag_finish_dynamic_sections (bfd *output_bfd,
3287 struct bfd_link_info *info)
3288{
3289 bfd *dynobj;
3290 struct elf_metag_link_hash_table *htab;
3291 asection *sdyn;
3292
3293 htab = metag_link_hash_table (info);
3294 dynobj = htab->etab.dynobj;
3295
ad1fc92a 3296 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
a3c62988
NC		 3297
3298 if (htab->etab.dynamic_sections_created)
3299 {
3300 asection *splt;
3301 Elf32_External_Dyn *dyncon, *dynconend;
3302
3303 if (sdyn == NULL)
3304 abort ();
3305
3306 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3307 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3308 for (; dyncon < dynconend; dyncon++)
3309 {
3310 Elf_Internal_Dyn dyn;
3311 asection *s;
3312
3313 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3314
3315 switch (dyn.d_tag)
3316 {
3317 default:
3318 continue;
3319
3320 case DT_PLTGOT:
ce558b89 3321 s = htab->etab.sgot;
4ade44b7 3322 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a3c62988
NC		 3323 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3324 break;
3325
3326 case DT_JMPREL:
ce558b89 3327 s = htab->etab.srelplt;
4ade44b7 3328 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a3c62988
NC		 3329 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3330 break;
3331
3332 case DT_PLTRELSZ:
ce558b89 3333 s = htab->etab.srelplt;
a3c62988
NC		 3334 dyn.d_un.d_val = s->size;
3335 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3336 break;
a3c62988
NC		 3337 }
3338
3339 }
3340
3341 /* Fill in the first entry in the procedure linkage table. */
ce558b89 3342 splt = htab->etab.splt;
a3c62988
NC		 3343 if (splt && splt->size > 0)
3344 {
3345 unsigned long addr;
3346 /* addr = .got + 4 */
ce558b89
AM		 3347 addr = (htab->etab.sgot->output_section->vma
3348 + htab->etab.sgot->output_offset + 4);
0e1862bb 3349 if (bfd_link_pic (info))
a3c62988
NC		 3350 {
3351 addr -= splt->output_section->vma + splt->output_offset;
3352 bfd_put_32 (output_bfd,
3353 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3354 splt->contents);
3355 bfd_put_32 (output_bfd,
3356 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3357 splt->contents + 4);
3358 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3359 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3360 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3361 }
3362 else
3363 {
3364 bfd_put_32 (output_bfd,
3365 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3366 splt->contents);
3367 bfd_put_32 (output_bfd,
3368 plt0_entry[1] | ((addr & 0xffff) << 3),
3369 splt->contents + 4);
3370 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3371 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3372 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3373 }
3374
3375 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3376 PLT_ENTRY_SIZE;
3377 }
3378 }
3379
ce558b89 3380 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
a3c62988
NC		 3381 {
3382 /* Fill in the first entry in the global offset table.
3383 We use it to point to our dynamic section, if we have one. */
3384 bfd_put_32 (output_bfd,
3385 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
ce558b89 3386 htab->etab.sgot->contents);
a3c62988
NC		 3387
3388 /* The second entry is reserved for use by the dynamic linker. */
ce558b89 3389 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
a3c62988
NC		 3390
3391 /* Set .got entry size. */
ce558b89 3392 elf_section_data (htab->etab.sgot->output_section)
a3c62988
NC		 3393 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3394 }
3395
3396 return TRUE;
3397}
3398
3399/* Return the section that should be marked against GC for a given
3400 relocation. */
3401
3402static asection *
3403elf_metag_gc_mark_hook (asection *sec,
3404 struct bfd_link_info *info,
3405 Elf_Internal_Rela *rela,
3406 struct elf_link_hash_entry *hh,
3407 Elf_Internal_Sym *sym)
3408{
3409 if (hh != NULL)
3410 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3411 {
3412 case R_METAG_GNU_VTINHERIT:
3413 case R_METAG_GNU_VTENTRY:
3414 return NULL;
3415 }
3416
3417 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3418}
3419
3420/* Update the got and plt entry reference counts for the section being
3421 removed. */
3422
3423static bfd_boolean
3424elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3425 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3426 asection *sec ATTRIBUTE_UNUSED,
3427 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3428{
3429 Elf_Internal_Shdr *symtab_hdr;
3430 struct elf_link_hash_entry **eh_syms;
3431 bfd_signed_vma *local_got_refcounts;
3432 bfd_signed_vma *local_plt_refcounts;
3433 const Elf_Internal_Rela *rel, *relend;
3434
0e1862bb 3435 if (bfd_link_relocatable (info))
a3c62988
NC		 3436 return TRUE;
3437
3438 elf_section_data (sec)->local_dynrel = NULL;
3439
3440 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3441 eh_syms = elf_sym_hashes (abfd);
3442 local_got_refcounts = elf_local_got_refcounts (abfd);
3443 local_plt_refcounts = local_got_refcounts;
3444 if (local_plt_refcounts != NULL)
3445 local_plt_refcounts += symtab_hdr->sh_info;
3446
3447 relend = relocs + sec->reloc_count;
3448 for (rel = relocs; rel < relend; rel++)
3449 {
3450 unsigned long r_symndx;
3451 unsigned int r_type;
3452 struct elf_link_hash_entry *eh = NULL;
3453
3454 r_symndx = ELF32_R_SYM (rel->r_info);
3455 if (r_symndx >= symtab_hdr->sh_info)
3456 {
3457 struct elf_metag_link_hash_entry *hh;
3458 struct elf_metag_dyn_reloc_entry **hdh_pp;
3459 struct elf_metag_dyn_reloc_entry *hdh_p;
3460
3461 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3462 while (eh->root.type == bfd_link_hash_indirect
3463 || eh->root.type == bfd_link_hash_warning)
3464 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3465 hh = (struct elf_metag_link_hash_entry *) eh;
3466
3467 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3468 hdh_pp = &hdh_p->hdh_next)
3469 if (hdh_p->sec == sec)
3470 {
3471 /* Everything must go for SEC. */
3472 *hdh_pp = hdh_p->hdh_next;
3473 break;
3474 }
3475 }
3476
3477 r_type = ELF32_R_TYPE (rel->r_info);
3478 switch (r_type)
3479 {
3480 case R_METAG_TLS_LDM:
3481 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3482 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3483 break;
3484 case R_METAG_TLS_IE:
3485 case R_METAG_TLS_GD:
3486 case R_METAG_GETSET_GOT:
3487 if (eh != NULL)
3488 {
3489 if (eh->got.refcount > 0)
3490 eh->got.refcount -= 1;
3491 }
3492 else if (local_got_refcounts != NULL)
3493 {
3494 if (local_got_refcounts[r_symndx] > 0)
3495 local_got_refcounts[r_symndx] -= 1;
3496 }
3497 break;
3498
3499 case R_METAG_RELBRANCH_PLT:
3500 if (eh != NULL)
3501 {
3502 if (eh->plt.refcount > 0)
3503 eh->plt.refcount -= 1;
3504 }
3505 break;
3506
3507 case R_METAG_ADDR32:
3508 case R_METAG_HIADDR16:
3509 case R_METAG_LOADDR16:
3510 case R_METAG_GETSETOFF:
3511 case R_METAG_RELBRANCH:
3512 if (eh != NULL)
3513 {
3514 struct elf_metag_link_hash_entry *hh;
3515 struct elf_metag_dyn_reloc_entry **hdh_pp;
3516 struct elf_metag_dyn_reloc_entry *hdh_p;
3517
0e1862bb 3518 if (!bfd_link_pic (info) && eh->plt.refcount > 0)
a3c62988
NC		 3519 eh->plt.refcount -= 1;
3520
3521 hh = (struct elf_metag_link_hash_entry *) eh;
3522
3523 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3524 hdh_pp = &hdh_p->hdh_next)
3525 if (hdh_p->sec == sec)
3526 {
3527 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3528 hdh_p->relative_count -= 1;
3529 hdh_p->count -= 1;
3530 if (hdh_p->count == 0)
3531 *hdh_pp = hdh_p->hdh_next;
3532 break;
3533 }
3534 }
3535 break;
3536
3537 default:
3538 break;
3539 }
3540 }
3541
3542 return TRUE;
3543}
3544
3545/* Determine the type of stub needed, if any, for a call. */
3546
3547static enum elf_metag_stub_type
3548metag_type_of_stub (asection *input_sec,
3549 const Elf_Internal_Rela *rel,
3550 struct elf_metag_link_hash_entry *hh,
3551 bfd_vma destination,
3552 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3553{
3554 bfd_vma location;
3555 bfd_vma branch_offset;
3556 bfd_vma max_branch_offset;
3557
3558 if (hh != NULL &&
3559 !(hh->eh.root.type == bfd_link_hash_defined
3560 || hh->eh.root.type == bfd_link_hash_defweak))
3561 return metag_stub_none;
3562
3563 /* Determine where the call point is. */
3564 location = (input_sec->output_offset
3565 + input_sec->output_section->vma
3566 + rel->r_offset);
3567
3568 branch_offset = destination - location;
3569
3570 /* Determine if a long branch stub is needed. Meta branch offsets
3571 are signed 19 bits 4 byte aligned. */
3572 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3573
3574 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3575 {
0e1862bb 3576 if (bfd_link_pic (info))
a3c62988
NC		 3577 return metag_stub_long_branch_shared;
3578 else
3579 return metag_stub_long_branch;
3580 }
3581
3582 return metag_stub_none;
3583}
3584
3585#define MOVT_A0_3 0x82180005
3586#define JUMP_A0_3 0xac180003
3587
3588#define MOVT_A1LBP 0x83080005
3589#define ADD_A1LBP 0x83080000
3590
3591#define ADDT_A0_3_CPC 0x82980001
3592#define ADD_A0_3_A0_3 0x82180000
3593#define MOV_PC_A0_3 0xa3180ca0
3594
3595static bfd_boolean
3596metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3597{
3598 struct elf_metag_stub_hash_entry *hsh;
3599 asection *stub_sec;
3600 bfd *stub_bfd;
3601 bfd_byte *loc;
3602 bfd_vma sym_value;
3603 int size;
3604
3605 /* Massage our args to the form they really have. */
3606 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3607
3608 stub_sec = hsh->stub_sec;
3609
3610 /* Make a note of the offset within the stubs for this entry. */
3611 hsh->stub_offset = stub_sec->size;
3612 loc = stub_sec->contents + hsh->stub_offset;
3613
3614 stub_bfd = stub_sec->owner;
3615
3616 switch (hsh->stub_type)
3617 {
3618 case metag_stub_long_branch_shared:
3619 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3620 calculate the jump target using A0.3 as a temporary. Then a MOV
3621 to PC carries out the jump. */
3622 sym_value = (hsh->target_value
3623 + hsh->target_section->output_offset
3624 + hsh->target_section->output_section->vma
3625 + hsh->addend);
3626
3627 sym_value -= (hsh->stub_offset
3628 + stub_sec->output_offset
3629 + stub_sec->output_section->vma);
3630
3631 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3632 loc);
3633
3634 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3635 loc + 4);
3636
3637 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3638
3639 size = 12;
3640 break;
3641 case metag_stub_long_branch:
3642 /* A standard long branch stub is a MOVT instruction followed by a
3643 JUMP instruction using the A0.3 register as a temporary. This is
3644 the same method used by the LDLK linker (patch.c). */
3645 sym_value = (hsh->target_value
3646 + hsh->target_section->output_offset
3647 + hsh->target_section->output_section->vma
3648 + hsh->addend);
3649
3650 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3651 loc);
3652
3653 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3654
3655 size = 8;
3656 break;
3657 default:
3658 BFD_FAIL ();
3659 return FALSE;
3660 }
3661
3662 stub_sec->size += size;
3663 return TRUE;
3664}
3665
3666/* As above, but don't actually build the stub. Just bump offset so
3667 we know stub section sizes. */
3668
3669static bfd_boolean
3670metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3671{
3672 struct elf_metag_stub_hash_entry *hsh;
3673 int size = 0;
3674
3675 /* Massage our args to the form they really have. */
3676 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3677
3678 if (hsh->stub_type == metag_stub_long_branch)
3679 size = 8;
3680 else if (hsh->stub_type == metag_stub_long_branch_shared)
3681 size = 12;
3682
3683 hsh->stub_sec->size += size;
3684 return TRUE;
3685}
3686
3687/* Set up various things so that we can make a list of input sections
3688 for each output section included in the link. Returns -1 on error,
3689 0 when no stubs will be needed, and 1 on success. */
3690
3691int
3692elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3693{
3694 bfd *input_bfd;
3695 unsigned int bfd_count;
7292b3ac 3696 unsigned int top_id, top_index;
a3c62988
NC		 3697 asection *section;
3698 asection **input_list, **list;
3699 bfd_size_type amt;
3700 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3701
3702 /* Count the number of input BFDs and find the top input section id. */
3703 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3704 input_bfd != NULL;
c72f2fb2 3705 input_bfd = input_bfd->link.next)
a3c62988
NC		 3706 {
3707 bfd_count += 1;
3708 for (section = input_bfd->sections;
3709 section != NULL;
3710 section = section->next)
3711 {
3712 if (top_id < section->id)
3713 top_id = section->id;
3714 }
3715 }
3716
3717 htab->bfd_count = bfd_count;
3718
3719 amt = sizeof (struct map_stub) * (top_id + 1);
3720 htab->stub_group = bfd_zmalloc (amt);
3721 if (htab->stub_group == NULL)
3722 return -1;
3723
3724 /* We can't use output_bfd->section_count here to find the top output
3725 section index as some sections may have been removed, and
3726 strip_excluded_output_sections doesn't renumber the indices. */
3727 for (section = output_bfd->sections, top_index = 0;
3728 section != NULL;
3729 section = section->next)
3730 {
3731 if (top_index < section->index)
3732 top_index = section->index;
3733 }
3734
3735 htab->top_index = top_index;
3736 amt = sizeof (asection *) * (top_index + 1);
3737 input_list = bfd_malloc (amt);
3738 htab->input_list = input_list;
3739 if (input_list == NULL)
3740 return -1;
3741
3742 /* For sections we aren't interested in, mark their entries with a
3743 value we can check later. */
3744 list = input_list + top_index;
3745 do
3746 *list = bfd_abs_section_ptr;
3747 while (list-- != input_list);
3748
3749 for (section = output_bfd->sections;
3750 section != NULL;
3751 section = section->next)
3752 {
3753 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3754 * have PC relative relocs in them but no code flag set. */
3755 if (((section->flags & SEC_CODE) != 0) ||
3756 strcmp(".ctors", section->name) ||
3757 strcmp(".dtors", section->name))
3758 input_list[section->index] = NULL;
3759 }
3760
3761 return 1;
3762}
3763
3764/* The linker repeatedly calls this function for each input section,
3765 in the order that input sections are linked into output sections.
3766 Build lists of input sections to determine groupings between which
3767 we may insert linker stubs. */
3768
3769void
3770elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3771{
3772 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3773
3774 if (isec->output_section->index <= htab->top_index)
3775 {
3776 asection **list = htab->input_list + isec->output_section->index;
3777 if (*list != bfd_abs_section_ptr)
3778 {
3779 /* Steal the link_sec pointer for our list. */
3780#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3781 /* This happens to make the list in reverse order,
3782 which is what we want. */
3783 PREV_SEC (isec) = *list;
3784 *list = isec;
3785 }
3786 }
3787}
3788
3789/* See whether we can group stub sections together. Grouping stub
3790 sections may result in fewer stubs. More importantly, we need to
3791 put all .init* and .fini* stubs at the beginning of the .init or
3792 .fini output sections respectively, because glibc splits the
3793 _init and _fini functions into multiple parts. Putting a stub in
3794 the middle of a function is not a good idea. */
3795
3796static void
3797group_sections (struct elf_metag_link_hash_table *htab,
3798 bfd_size_type stub_group_size,
3799 bfd_boolean stubs_always_before_branch)
3800{
3801 asection **list = htab->input_list + htab->top_index;
3802 do
3803 {
3804 asection *tail = *list;
3805 if (tail == bfd_abs_section_ptr)
3806 continue;
3807 while (tail != NULL)
3808 {
3809 asection *curr;
3810 asection *prev;
3811 bfd_size_type total;
3812 bfd_boolean big_sec;
3813
3814 curr = tail;
3815 total = tail->size;
3816 big_sec = total >= stub_group_size;
3817
3818 while ((prev = PREV_SEC (curr)) != NULL
3819 && ((total += curr->output_offset - prev->output_offset)
3820 < stub_group_size))
3821 curr = prev;
3822
3823 /* OK, the size from the start of CURR to the end is less
3824 than stub_group_size bytes and thus can be handled by one stub
3825 section. (or the tail section is itself larger than
3826 stub_group_size bytes, in which case we may be toast.)
3827 We should really be keeping track of the total size of
3828 stubs added here, as stubs contribute to the final output
3829 section size. */
3830 do
3831 {
3832 prev = PREV_SEC (tail);
3833 /* Set up this stub group. */
3834 htab->stub_group[tail->id].link_sec = curr;
3835 }
3836 while (tail != curr && (tail = prev) != NULL);
3837
3838 /* But wait, there's more! Input sections up to stub_group_size
3839 bytes before the stub section can be handled by it too.
3840 Don't do this if we have a really large section after the
3841 stubs, as adding more stubs increases the chance that
3842 branches may not reach into the stub section. */
3843 if (!stubs_always_before_branch && !big_sec)
3844 {
3845 total = 0;
3846 while (prev != NULL
3847 && ((total += tail->output_offset - prev->output_offset)
3848 < stub_group_size))
3849 {
3850 tail = prev;
3851 prev = PREV_SEC (tail);
3852 htab->stub_group[tail->id].link_sec = curr;
3853 }
3854 }
3855 tail = prev;
3856 }
3857 }
3858 while (list-- != htab->input_list);
3859 free (htab->input_list);
3860#undef PREV_SEC
3861}
3862
3863/* Read in all local syms for all input bfds.
3864 Returns -1 on error, 0 otherwise. */
3865
3866static int
3867get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3868 struct bfd_link_info *info)
3869{
3870 unsigned int bfd_indx;
3871 Elf_Internal_Sym *local_syms, **all_local_syms;
3872 int stub_changed = 0;
3873 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3874
3875 /* We want to read in symbol extension records only once. To do this
3876 we need to read in the local symbols in parallel and save them for
3877 later use; so hold pointers to the local symbols in an array. */
3878 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3879 all_local_syms = bfd_zmalloc (amt);
3880 htab->all_local_syms = all_local_syms;
3881 if (all_local_syms == NULL)
3882 return -1;
3883
3884 /* Walk over all the input BFDs, swapping in local symbols. */
3885 for (bfd_indx = 0;
3886 input_bfd != NULL;
c72f2fb2 3887 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3888 {
3889 Elf_Internal_Shdr *symtab_hdr;
3890
3891 /* We'll need the symbol table in a second. */
3892 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3893 if (symtab_hdr->sh_info == 0)
3894 continue;
3895
3896 /* We need an array of the local symbols attached to the input bfd. */
3897 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3898 if (local_syms == NULL)
3899 {
3900 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3901 symtab_hdr->sh_info, 0,
3902 NULL, NULL, NULL);
3903 /* Cache them for elf_link_input_bfd. */
3904 symtab_hdr->contents = (unsigned char *) local_syms;
3905 }
3906 if (local_syms == NULL)
3907 return -1;
3908
3909 all_local_syms[bfd_indx] = local_syms;
3910 }
3911
3912 return stub_changed;
3913}
3914
3915/* Determine and set the size of the stub section for a final link.
3916
3917The basic idea here is to examine all the relocations looking for
3918PC-relative calls to a target that is unreachable with a "CALLR"
3919instruction. */
3920
3921/* See elf32-hppa.c and elf64-ppc.c. */
3922
3923bfd_boolean
3924elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3925 struct bfd_link_info *info,
3926 bfd_signed_vma group_size,
3927 asection * (*add_stub_section) (const char *, asection *),
3928 void (*layout_sections_again) (void))
3929{
3930 bfd_size_type stub_group_size;
3931 bfd_boolean stubs_always_before_branch;
3932 bfd_boolean stub_changed;
3933 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3934
3935 /* Stash our params away. */
3936 htab->stub_bfd = stub_bfd;
3937 htab->add_stub_section = add_stub_section;
3938 htab->layout_sections_again = layout_sections_again;
3939 stubs_always_before_branch = group_size < 0;
3940 if (group_size < 0)
3941 stub_group_size = -group_size;
3942 else
3943 stub_group_size = group_size;
3944 if (stub_group_size == 1)
3945 {
3946 /* Default values. */
3947 /* FIXME: not sure what these values should be */
3948 if (stubs_always_before_branch)
3949 {
3950 stub_group_size = (1 << BRANCH_BITS);
3951 }
3952 else
3953 {
3954 stub_group_size = (1 << BRANCH_BITS);
3955 }
3956 }
3957
3958 group_sections (htab, stub_group_size, stubs_always_before_branch);
3959
3960 switch (get_local_syms (output_bfd, info->input_bfds, info))
3961 {
3962 default:
3963 if (htab->all_local_syms)
3964 goto error_ret_free_local;
3965 return FALSE;
3966
3967 case 0:
3968 stub_changed = FALSE;
3969 break;
3970
3971 case 1:
3972 stub_changed = TRUE;
3973 break;
3974 }
3975
3976 while (1)
3977 {
3978 bfd *input_bfd;
3979 unsigned int bfd_indx;
3980 asection *stub_sec;
3981
3982 for (input_bfd = info->input_bfds, bfd_indx = 0;
3983 input_bfd != NULL;
c72f2fb2 3984 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3985 {
3986 Elf_Internal_Shdr *symtab_hdr;
3987 asection *section;
3988 Elf_Internal_Sym *local_syms;
3989
3990 /* We'll need the symbol table in a second. */
3991 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3992 if (symtab_hdr->sh_info == 0)
3993 continue;
3994
3995 local_syms = htab->all_local_syms[bfd_indx];
3996
3997 /* Walk over each section attached to the input bfd. */
3998 for (section = input_bfd->sections;
3999 section != NULL;
4000 section = section->next)
4001 {
4002 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4003
4004 /* If there aren't any relocs, then there's nothing more
4005 to do. */
4006 if ((section->flags & SEC_RELOC) == 0
4007 || section->reloc_count == 0)
4008 continue;
4009
4010 /* If this section is a link-once section that will be
4011 discarded, then don't create any stubs. */
4012 if (section->output_section == NULL
4013 || section->output_section->owner != output_bfd)
4014 continue;
4015
4016 /* Get the relocs. */
4017 internal_relocs
4018 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4019 info->keep_memory);
4020 if (internal_relocs == NULL)
4021 goto error_ret_free_local;
4022
4023 /* Now examine each relocation. */
4024 irela = internal_relocs;
4025 irelaend = irela + section->reloc_count;
4026 for (; irela < irelaend; irela++)
4027 {
4028 unsigned int r_type, r_indx;
4029 enum elf_metag_stub_type stub_type;
4030 struct elf_metag_stub_hash_entry *hsh;
4031 asection *sym_sec;
4032 bfd_vma sym_value;
4033 bfd_vma destination;
4034 struct elf_metag_link_hash_entry *hh;
4035 char *stub_name;
4036 const asection *id_sec;
4037
4038 r_type = ELF32_R_TYPE (irela->r_info);
4039 r_indx = ELF32_R_SYM (irela->r_info);
4040
4041 if (r_type >= (unsigned int) R_METAG_MAX)
4042 {
4043 bfd_set_error (bfd_error_bad_value);
4044 error_ret_free_internal:
4045 if (elf_section_data (section)->relocs == NULL)
4046 free (internal_relocs);
4047 goto error_ret_free_local;
4048 }
4049
4050 /* Only look for stubs on CALLR and B instructions. */
4051 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4052 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4053 continue;
4054
4055 /* Now determine the call target, its name, value,
4056 section. */
4057 sym_sec = NULL;
4058 sym_value = 0;
4059 destination = 0;
4060 hh = NULL;
4061 if (r_indx < symtab_hdr->sh_info)
4062 {
4063 /* It's a local symbol. */
4064 Elf_Internal_Sym *sym;
4065 Elf_Internal_Shdr *hdr;
4066 unsigned int shndx;
4067
4068 sym = local_syms + r_indx;
4069 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4070 sym_value = sym->st_value;
4071 shndx = sym->st_shndx;
4072 if (shndx < elf_numsections (input_bfd))
4073 {
4074 hdr = elf_elfsections (input_bfd)[shndx];
4075 sym_sec = hdr->bfd_section;
4076 destination = (sym_value + irela->r_addend
4077 + sym_sec->output_offset
4078 + sym_sec->output_section->vma);
4079 }
4080 }
4081 else
4082 {
4083 /* It's an external symbol. */
4084 int e_indx;
4085
4086 e_indx = r_indx - symtab_hdr->sh_info;
4087 hh = ((struct elf_metag_link_hash_entry *)
4088 elf_sym_hashes (input_bfd)[e_indx]);
4089
4090 while (hh->eh.root.type == bfd_link_hash_indirect
4091 || hh->eh.root.type == bfd_link_hash_warning)
4092 hh = ((struct elf_metag_link_hash_entry *)
4093 hh->eh.root.u.i.link);
4094
4095 if (hh->eh.root.type == bfd_link_hash_defined
4096 || hh->eh.root.type == bfd_link_hash_defweak)
4097 {
4098 sym_sec = hh->eh.root.u.def.section;
4099 sym_value = hh->eh.root.u.def.value;
4100 if (hh->eh.plt.offset != (bfd_vma) -1
4101 && hh->eh.dynindx != -1
4102 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4103 {
ce558b89 4104 sym_sec = htab->etab.splt;
a3c62988
NC		 4105 sym_value = hh->eh.plt.offset;
4106 }
4107
4108 if (sym_sec->output_section != NULL)
4109 destination = (sym_value + irela->r_addend
4110 + sym_sec->output_offset
4111 + sym_sec->output_section->vma);
4112 else
4113 continue;
4114 }
4115 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4116 {
0e1862bb 4117 if (! bfd_link_pic (info))
a3c62988
NC		 4118 continue;
4119 }
4120 else if (hh->eh.root.type == bfd_link_hash_undefined)
4121 {
4122 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4123 && (ELF_ST_VISIBILITY (hh->eh.other)
4124 == STV_DEFAULT)))
4125 continue;
4126 }
4127 else
4128 {
4129 bfd_set_error (bfd_error_bad_value);
4130 goto error_ret_free_internal;
4131 }
4132 }
4133
4134 /* Determine what (if any) linker stub is needed. */
4135 stub_type = metag_type_of_stub (section, irela, hh,
4136 destination, info);
4137 if (stub_type == metag_stub_none)
4138 continue;
4139
4140 /* Support for grouping stub sections. */
4141 id_sec = htab->stub_group[section->id].link_sec;
4142
4143 /* Get the name of this stub. */
4144 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4145 if (!stub_name)
4146 goto error_ret_free_internal;
4147
4148 hsh = metag_stub_hash_lookup (&htab->bstab,
4149 stub_name,
4150 FALSE, FALSE);
4151 if (hsh != NULL)
4152 {
4153 /* The proper stub has already been created. */
4154 free (stub_name);
4155 continue;
4156 }
4157
4158 hsh = metag_add_stub (stub_name, section, htab);
4159 if (hsh == NULL)
4160 {
4161 free (stub_name);
4162 goto error_ret_free_internal;
4163 }
4164 hsh->target_value = sym_value;
4165 hsh->target_section = sym_sec;
4166 hsh->stub_type = stub_type;
4167 hsh->hh = hh;
4168 hsh->addend = irela->r_addend;
4169 stub_changed = TRUE;
4170 }
4171
4172 /* We're done with the internal relocs, free them. */
4173 if (elf_section_data (section)->relocs == NULL)
4174 free (internal_relocs);
4175 }
4176 }
4177
4178 if (!stub_changed)
4179 break;
4180
4181 /* OK, we've added some stubs. Find out the new size of the
4182 stub sections. */
4183 for (stub_sec = htab->stub_bfd->sections;
4184 stub_sec != NULL;
4185 stub_sec = stub_sec->next)
4186 stub_sec->size = 0;
4187
4188 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4189
4190 /* Ask the linker to do its stuff. */
4191 (*htab->layout_sections_again) ();
4192 stub_changed = FALSE;
4193 }
4194
4195 free (htab->all_local_syms);
4196 return TRUE;
4197
4198 error_ret_free_local:
4199 free (htab->all_local_syms);
4200 return FALSE;
4201}
4202
4203/* Build all the stubs associated with the current output file. The
4204 stubs are kept in a hash table attached to the main linker hash
4205 table. This function is called via metagelf_finish in the linker. */
4206
4207bfd_boolean
4208elf_metag_build_stubs (struct bfd_link_info *info)
4209{
4210 asection *stub_sec;
4211 struct bfd_hash_table *table;
4212 struct elf_metag_link_hash_table *htab;
4213
4214 htab = metag_link_hash_table (info);
4215
4216 for (stub_sec = htab->stub_bfd->sections;
4217 stub_sec != NULL;
4218 stub_sec = stub_sec->next)
4219 {
4220 bfd_size_type size;
4221
4222 /* Allocate memory to hold the linker stubs. */
4223 size = stub_sec->size;
4224 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4225 if (stub_sec->contents == NULL && size != 0)
4226 return FALSE;
4227 stub_sec->size = 0;
4228 }
4229
4230 /* Build the stubs as directed by the stub hash table. */
4231 table = &htab->bstab;
4232 bfd_hash_traverse (table, metag_build_one_stub, info);
4233
4234 return TRUE;
4235}
4236
4237/* Return TRUE if SYM represents a local label symbol. */
4238
4239static bfd_boolean
4240elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4241{
4242 if (name[0] == '$' && name[1] == 'L')
4243 return 1;
4244 return _bfd_elf_is_local_label_name (abfd, name);
4245}
4246
4247/* Return address for Ith PLT stub in section PLT, for relocation REL
4248 or (bfd_vma) -1 if it should not be included. */
4249
4250static bfd_vma
4251elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4252 const arelent *rel ATTRIBUTE_UNUSED)
4253{
4254 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4255}
4256
4257#define ELF_ARCH bfd_arch_metag
4258#define ELF_TARGET_ID METAG_ELF_DATA
4259#define ELF_MACHINE_CODE EM_METAG
4260#define ELF_MINPAGESIZE 0x1000
4261#define ELF_MAXPAGESIZE 0x4000
4262#define ELF_COMMONPAGESIZE 0x1000
4263
6d00b590 4264#define TARGET_LITTLE_SYM metag_elf32_vec
a3c62988
NC		 4265#define TARGET_LITTLE_NAME "elf32-metag"
4266
4267#define elf_symbol_leading_char '_'
4268
4269#define elf_info_to_howto_rel NULL
4270#define elf_info_to_howto metag_info_to_howto_rela
4271
4272#define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4273#define bfd_elf32_bfd_link_hash_table_create \
4274 elf_metag_link_hash_table_create
a3c62988
NC		 4275#define elf_backend_relocate_section elf_metag_relocate_section
4276#define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4277#define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4278#define elf_backend_check_relocs elf_metag_check_relocs
4279#define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4280#define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4281#define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4282#define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4283#define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4284#define elf_backend_omit_section_dynsym \
4285 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4286#define elf_backend_post_process_headers elf_metag_post_process_headers
4287#define elf_backend_reloc_type_class elf_metag_reloc_type_class
4288#define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4289#define elf_backend_plt_sym_val elf_metag_plt_sym_val
4290
4291#define elf_backend_can_gc_sections 1
4292#define elf_backend_can_refcount 1
ce558b89
AM		 4293#define elf_backend_rela_normal 1
4294#define elf_backend_want_got_plt 1
a3c62988
NC		 4295#define elf_backend_want_got_sym 0
4296#define elf_backend_want_plt_sym 0
4297#define elf_backend_plt_readonly 1
64f52338 4298#define elf_backend_dtrel_excludes_plt 1
5474d94f 4299#define elf_backend_want_dynrelro 1
a3c62988
NC		 4300
4301#define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4302#define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4303
4304#include "elf32-target.h"
GDB Binutils - Deliverables
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