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Copy relocations against protected symbols
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
CommitLineData
a3c62988 1/* Meta support for 32-bit ELF
4b95cf5c 2 Copyright (C) 2013-2014 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 */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681};
682
683#define BRANCH_BITS 19
684
685/* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694#define GOT_REG_OFFSET 0x2000
695
696struct metag_reloc_map
697{
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700};
701
702static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746enum elf_metag_stub_type
747{
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751};
752
753struct elf_metag_stub_hash_entry
754{
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780};
781
782struct elf_metag_link_hash_entry
783{
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811};
812
813struct elf_metag_link_hash_table
814{
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sgot;
847 asection *sgotplt;
848 asection *srelgot;
849 asection *splt;
850 asection *srelplt;
851 asection *sdynbss;
852 asection *srelbss;
853
854 /* Small local sym cache. */
855 struct sym_cache sym_cache;
856
857 /* Data for LDM relocations. */
858 union
859 {
860 bfd_signed_vma refcount;
861 bfd_vma offset;
862 } tls_ldm_got;
863};
864
865/* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
867 segment p_vaddr. */
868static bfd_vma
869dtpoff_base (struct bfd_link_info *info)
870{
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info)->tls_sec == NULL)
873 return 0;
874 return elf_hash_table (info)->tls_sec->vma;
875}
876
877/* Return the relocation value for R_METAG_TLS_IE */
878static bfd_vma
879tpoff (struct bfd_link_info *info, bfd_vma address)
880{
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info)->tls_sec == NULL)
883 return 0;
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address - elf_hash_table (info)->tls_sec->vma
887 + align_power ((bfd_vma) 8,
888 elf_hash_table (info)->tls_sec->alignment_power));
889}
890
891static void
892metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
893 arelent *cache_ptr,
894 Elf_Internal_Rela *dst)
895{
896 unsigned int r_type;
897
898 r_type = ELF32_R_TYPE (dst->r_info);
899 BFD_ASSERT (r_type < (unsigned int) R_METAG_MAX);
900 cache_ptr->howto = & elf_metag_howto_table [r_type];
901}
902
903static reloc_howto_type *
904metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
905 bfd_reloc_code_real_type code)
906{
907 unsigned int i;
908
909 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
910 if (metag_reloc_map [i].bfd_reloc_val == code)
911 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
912
913 return NULL;
914}
915
916static reloc_howto_type *
917metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
918 const char *r_name)
919{
920 unsigned int i;
921
922 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
923 if (elf_metag_howto_table[i].name != NULL
924 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
925 return &elf_metag_howto_table[i];
926
927 return NULL;
928}
929
930/* Various hash macros and functions. */
931#define metag_link_hash_table(p) \
932 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
933 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
934
935#define metag_elf_hash_entry(ent) \
936 ((struct elf_metag_link_hash_entry *)(ent))
937
938#define metag_stub_hash_entry(ent) \
939 ((struct elf_metag_stub_hash_entry *)(ent))
940
941#define metag_stub_hash_lookup(table, string, create, copy) \
942 ((struct elf_metag_stub_hash_entry *) \
943 bfd_hash_lookup ((table), (string), (create), (copy)))
944
945#define metag_elf_local_got_tls_type(abfd) \
946 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
947
948/* Assorted hash table functions. */
949
950/* Initialize an entry in the stub hash table. */
951
952static struct bfd_hash_entry *
953stub_hash_newfunc (struct bfd_hash_entry *entry,
954 struct bfd_hash_table *table,
955 const char *string)
956{
957 /* Allocate the structure if it has not already been allocated by a
958 subclass. */
959 if (entry == NULL)
960 {
961 entry = bfd_hash_allocate (table,
962 sizeof (struct elf_metag_stub_hash_entry));
963 if (entry == NULL)
964 return entry;
965 }
966
967 /* Call the allocation method of the superclass. */
968 entry = bfd_hash_newfunc (entry, table, string);
969 if (entry != NULL)
970 {
971 struct elf_metag_stub_hash_entry *hsh;
972
973 /* Initialize the local fields. */
974 hsh = (struct elf_metag_stub_hash_entry *) entry;
975 hsh->stub_sec = NULL;
976 hsh->stub_offset = 0;
977 hsh->target_value = 0;
978 hsh->target_section = NULL;
979 hsh->stub_type = metag_stub_long_branch;
980 hsh->hh = NULL;
981 hsh->id_sec = NULL;
982 }
983
984 return entry;
985}
986
987/* Initialize an entry in the link hash table. */
988
989static struct bfd_hash_entry *
990metag_link_hash_newfunc (struct bfd_hash_entry *entry,
991 struct bfd_hash_table *table,
992 const char *string)
993{
994 /* Allocate the structure if it has not already been allocated by a
995 subclass. */
996 if (entry == NULL)
997 {
998 entry = bfd_hash_allocate (table,
999 sizeof (struct elf_metag_link_hash_entry));
1000 if (entry == NULL)
1001 return entry;
1002 }
1003
1004 /* Call the allocation method of the superclass. */
1005 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1006 if (entry != NULL)
1007 {
1008 struct elf_metag_link_hash_entry *hh;
1009
1010 /* Initialize the local fields. */
1011 hh = (struct elf_metag_link_hash_entry *) entry;
1012 hh->hsh_cache = NULL;
1013 hh->dyn_relocs = NULL;
1014 hh->tls_type = GOT_UNKNOWN;
1015 }
1016
1017 return entry;
1018}
1019
68faa637
AM		 1020/* Free the derived linker hash table. */
1021
1022static void
d495ab0d 1023elf_metag_link_hash_table_free (bfd *obfd)
68faa637
AM		 1024{
1025 struct elf_metag_link_hash_table *htab
d495ab0d 1026 = (struct elf_metag_link_hash_table *) obfd->link.hash;
68faa637
AM		 1027
1028 bfd_hash_table_free (&htab->bstab);
d495ab0d 1029 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1030}
1031
a3c62988
NC		 1032/* Create the derived linker hash table. The Meta ELF port uses the derived
1033 hash table to keep information specific to the Meta ELF linker (without
1034 using static variables). */
1035
1036static struct bfd_link_hash_table *
1037elf_metag_link_hash_table_create (bfd *abfd)
1038{
1039 struct elf_metag_link_hash_table *htab;
1040 bfd_size_type amt = sizeof (*htab);
1041
7bf52ea2 1042 htab = bfd_zmalloc (amt);
a3c62988
NC		 1043 if (htab == NULL)
1044 return NULL;
1045
1046 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1047 metag_link_hash_newfunc,
1048 sizeof (struct elf_metag_link_hash_entry),
1049 METAG_ELF_DATA))
1050 {
1051 free (htab);
1052 return NULL;
1053 }
1054
1055 /* Init the stub hash table too. */
1056 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1057 sizeof (struct elf_metag_stub_hash_entry)))
d495ab0d
AM		 1058 {
1059 _bfd_elf_link_hash_table_free (abfd);
1060 return NULL;
1061 }
1062 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
a3c62988 1063
a3c62988
NC		 1064 return &htab->etab.root;
1065}
1066
a3c62988
NC		 1067/* Section name for stubs is the associated section name plus this
1068 string. */
1069#define STUB_SUFFIX ".stub"
1070
1071/* Build a name for an entry in the stub hash table. */
1072
1073static char *
1074metag_stub_name (const asection *input_section,
1075 const asection *sym_sec,
1076 const struct elf_metag_link_hash_entry *hh,
1077 const Elf_Internal_Rela *rel)
1078{
1079 char *stub_name;
1080 bfd_size_type len;
1081
1082 if (hh)
1083 {
1084 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1085 stub_name = bfd_malloc (len);
1086 if (stub_name != NULL)
1087 {
1088 sprintf (stub_name, "%08x_%s+%x",
1089 input_section->id & 0xffffffff,
1090 hh->eh.root.root.string,
1091 (int) rel->r_addend & 0xffffffff);
1092 }
1093 }
1094 else
1095 {
1096 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1097 stub_name = bfd_malloc (len);
1098 if (stub_name != NULL)
1099 {
1100 sprintf (stub_name, "%08x_%x:%x+%x",
1101 input_section->id & 0xffffffff,
1102 sym_sec->id & 0xffffffff,
1103 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1104 (int) rel->r_addend & 0xffffffff);
1105 }
1106 }
1107 return stub_name;
1108}
1109
1110/* Look up an entry in the stub hash. Stub entries are cached because
1111 creating the stub name takes a bit of time. */
1112
1113static struct elf_metag_stub_hash_entry *
1114metag_get_stub_entry (const asection *input_section,
1115 const asection *sym_sec,
1116 struct elf_metag_link_hash_entry *hh,
1117 const Elf_Internal_Rela *rel,
1118 struct elf_metag_link_hash_table *htab)
1119{
1120 struct elf_metag_stub_hash_entry *hsh;
1121 const asection *id_sec;
1122
1123 /* If this input section is part of a group of sections sharing one
1124 stub section, then use the id of the first section in the group.
1125 Stub names need to include a section id, as there may well be
1126 more than one stub used to reach say, printf, and we need to
1127 distinguish between them. */
1128 id_sec = htab->stub_group[input_section->id].link_sec;
1129
1130 if (hh != NULL && hh->hsh_cache != NULL
1131 && hh->hsh_cache->hh == hh
1132 && hh->hsh_cache->id_sec == id_sec)
1133 {
1134 hsh = hh->hsh_cache;
1135 }
1136 else
1137 {
1138 char *stub_name;
1139
1140 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1141 if (stub_name == NULL)
1142 return NULL;
1143
1144 hsh = metag_stub_hash_lookup (&htab->bstab,
1145 stub_name, FALSE, FALSE);
1146
1147 if (hh != NULL)
1148 hh->hsh_cache = hsh;
1149
1150 free (stub_name);
1151 }
1152
1153 return hsh;
1154}
1155
1156/* Add a new stub entry to the stub hash. Not all fields of the new
1157 stub entry are initialised. */
1158
1159static struct elf_metag_stub_hash_entry *
1160metag_add_stub (const char *stub_name,
1161 asection *section,
1162 struct elf_metag_link_hash_table *htab)
1163{
1164 asection *link_sec;
1165 asection *stub_sec;
1166 struct elf_metag_stub_hash_entry *hsh;
1167
1168 link_sec = htab->stub_group[section->id].link_sec;
1169 stub_sec = htab->stub_group[section->id].stub_sec;
1170 if (stub_sec == NULL)
1171 {
1172 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1173 if (stub_sec == NULL)
1174 {
1175 size_t namelen;
1176 bfd_size_type len;
1177 char *s_name;
1178
1179 namelen = strlen (link_sec->name);
1180 len = namelen + sizeof (STUB_SUFFIX);
1181 s_name = bfd_alloc (htab->stub_bfd, len);
1182 if (s_name == NULL)
1183 return NULL;
1184
1185 memcpy (s_name, link_sec->name, namelen);
1186 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1187
1188 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1189 if (stub_sec == NULL)
1190 return NULL;
1191 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1192 }
1193 htab->stub_group[section->id].stub_sec = stub_sec;
1194 }
1195
1196 /* Enter this entry into the linker stub hash table. */
1197 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1198 TRUE, FALSE);
1199 if (hsh == NULL)
1200 {
1201 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
1202 section->owner,
1203 stub_name);
1204 return NULL;
1205 }
1206
1207 hsh->stub_sec = stub_sec;
1208 hsh->stub_offset = 0;
1209 hsh->id_sec = link_sec;
1210 return hsh;
1211}
1212
1213/* Check a signed integer value can be represented in the given number
1214 of bits. */
1215
1216static bfd_boolean
1217within_signed_range (int value, unsigned int bits)
1218{
1219 int min_val = -(1 << (bits - 1));
1220 int max_val = (1 << (bits - 1)) - 1;
1221 return (value <= max_val) && (value >= min_val);
1222}
1223
1224/* Perform a relocation as part of a final link. */
1225
1226static bfd_reloc_status_type
1227metag_final_link_relocate (reloc_howto_type *howto,
1228 bfd *input_bfd,
1229 asection *input_section,
1230 bfd_byte *contents,
1231 Elf_Internal_Rela *rel,
1232 bfd_vma relocation,
1233 struct elf_metag_link_hash_entry *hh,
1234 struct elf_metag_link_hash_table *htab,
1235 asection *sym_sec)
1236{
1237 bfd_reloc_status_type r = bfd_reloc_ok;
1238 bfd_byte *hit_data = contents + rel->r_offset;
1239 int opcode, op_shift, op_extended, l1, l2;
1240 bfd_signed_vma srel, addend = rel->r_addend;
1241 struct elf_metag_stub_hash_entry *hsh = NULL;
1242 bfd_vma location;
1243
1244 /* Find out where we are and where we're going. */
1245 location = (rel->r_offset +
1246 input_section->output_offset +
1247 input_section->output_section->vma);
1248
1249 switch (howto->type)
1250 {
1251 case R_METAG_RELBRANCH:
1252 case R_METAG_RELBRANCH_PLT:
1253 /* Make it a pc relative offset. */
1254 relocation -= location;
1255 break;
1256 case R_METAG_TLS_GD:
1257 case R_METAG_TLS_IE:
1258 relocation -= elf_gp (input_section->output_section->owner);
1259 break;
1260 default:
1261 break;
1262 }
1263
1264 switch (howto->type)
1265 {
1266 case R_METAG_RELBRANCH_PLT:
1267 case R_METAG_RELBRANCH:
1268 opcode = bfd_get_32 (input_bfd, hit_data);
1269
1270 srel = (bfd_signed_vma) relocation;
1271 srel += addend;
1272
1273 /* If the branch is out of reach, then redirect the
1274 call to the local stub for this function. */
1275 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1276 (srel < - (1 << (BRANCH_BITS + 1))))
1277 {
1278 if (sym_sec == NULL)
1279 break;
1280
1281 hsh = metag_get_stub_entry (input_section, sym_sec,
1282 hh, rel, htab);
1283 if (hsh == NULL)
1284 return bfd_reloc_undefined;
1285
1286 /* Munge up the value and addend so that we call the stub
1287 rather than the procedure directly. */
1288 srel = (hsh->stub_offset
1289 + hsh->stub_sec->output_offset
1290 + hsh->stub_sec->output_section->vma);
1291 srel -= location;
1292 }
1293
1294 srel = srel >> 2;
1295
1296 if (!within_signed_range (srel, BRANCH_BITS))
1297 {
1298 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1299 srel = 0;
1300 else
1301 return bfd_reloc_overflow;
1302 }
1303
1304 opcode &= ~(0x7ffff << 5);
1305 opcode |= ((srel & 0x7ffff) << 5);
1306
1307 bfd_put_32 (input_bfd, opcode, hit_data);
1308 break;
1309 case R_METAG_GETSETOFF:
1310 case R_METAG_GETSET_GOT:
1311 case R_METAG_GETSET_GOTOFF:
1312 opcode = bfd_get_32 (input_bfd, hit_data);
1313
1314 srel = (bfd_signed_vma) relocation;
1315 srel += addend;
1316
1317 /* Is this a standard or extended GET/SET? */
1318 if ((opcode & 0xf0000000) == 0xa0000000)
1319 {
1320 /* Extended GET/SET. */
1321 l1 = opcode & 0x2;
1322 l2 = opcode & 0x4;
1323 op_extended = 1;
1324 }
1325 else
1326 {
1327 /* Standard GET/SET. */
1328 l1 = opcode & 0x01000000;
1329 l2 = opcode & 0x04000000;
1330 op_extended = 0;
1331 }
1332
1333 /* Calculate the width of the GET/SET and how much we need to
1334 shift the result by. */
1335 if (l2)
1336 if (l1)
1337 op_shift = 3;
1338 else
1339 op_shift = 2;
1340 else
1341 if (l1)
1342 op_shift = 1;
1343 else
1344 op_shift = 0;
1345
1346 /* GET/SET offsets are scaled by the width of the transfer. */
1347 srel = srel >> op_shift;
1348
1349 /* Extended GET/SET has signed 12 bits of offset, standard has
1350 signed 6 bits. */
1351 if (op_extended)
1352 {
1353 if (!within_signed_range (srel, 12))
1354 {
1355 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1356 srel = 0;
1357 else
1358 return bfd_reloc_overflow;
1359 }
1360 opcode &= ~(0xfff << 7);
1361 opcode |= ((srel & 0xfff) << 7);
1362 }
1363 else
1364 {
1365 if (!within_signed_range (srel, 5))
1366 {
1367 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1368 srel = 0;
1369 else
1370 return bfd_reloc_overflow;
1371 }
1372 opcode &= ~(0x3f << 8);
1373 opcode |= ((srel & 0x3f) << 8);
1374 }
1375
1376 bfd_put_32 (input_bfd, opcode, hit_data);
1377 break;
1378 case R_METAG_TLS_GD:
1379 case R_METAG_TLS_LDM:
1380 opcode = bfd_get_32 (input_bfd, hit_data);
1381
1382 if ((bfd_signed_vma)relocation < 0)
1383 {
1384 /* sign extend immediate */
1385 if ((opcode & 0xf2000001) == 0x02000000)
1386 {
1387 /* ADD De.e,Dx.r,#I16 */
1388 /* set SE bit */
1389 opcode |= (1 << 1);
1390 } else
1391 return bfd_reloc_overflow;
1392 }
1393
1394 bfd_put_32 (input_bfd, opcode, hit_data);
1395
1396 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1397 contents, rel->r_offset,
1398 relocation, rel->r_addend);
1399 break;
1400 default:
1401 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1402 contents, rel->r_offset,
1403 relocation, rel->r_addend);
1404 }
1405
1406 return r;
1407}
1408
1409/* This is defined because R_METAG_NONE != 0...
1410 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1411#define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1412 rel, relend, howto, contents) \
1413 { \
1414 _bfd_clear_contents (howto, input_bfd, input_section, \
1415 contents + rel->r_offset); \
1416 \
1417 if (info->relocatable \
1418 && (input_section->flags & SEC_DEBUGGING)) \
1419 { \
1420 /* Only remove relocations in debug sections since other \
1421 sections may require relocations. */ \
1422 Elf_Internal_Shdr *rel_hdr; \
1423 \
1424 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1425 \
1426 /* Avoid empty output section. */ \
1427 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1428 { \
1429 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1430 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1431 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1432 \
1433 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1434 \
1435 input_section->reloc_count--; \
1436 relend--; \
1437 rel--; \
1438 continue; \
1439 } \
1440 } \
1441 \
1442 rel->r_info = R_METAG_NONE; \
1443 rel->r_addend = 0; \
1444 continue; \
1445 }
1446
1447/* Relocate a META ELF section.
1448
1449The RELOCATE_SECTION function is called by the new ELF backend linker
1450to handle the relocations for a section.
1451
1452The relocs are always passed as Rela structures; if the section
1453actually uses Rel structures, the r_addend field will always be
1454zero.
1455
1456This function is responsible for adjusting the section contents as
1457necessary, and (if using Rela relocs and generating a relocatable
1458output file) adjusting the reloc addend as necessary.
1459
1460This function does not have to worry about setting the reloc
1461address or the reloc symbol index.
1462
1463LOCAL_SYMS is a pointer to the swapped in local symbols.
1464
1465LOCAL_SECTIONS is an array giving the section in the input file
1466corresponding to the st_shndx field of each local symbol.
1467
1468The global hash table entry for the global symbols can be found
1469via elf_sym_hashes (input_bfd).
1470
1471When generating relocatable output, this function must handle
1472STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1473going to be the section symbol corresponding to the output
1474section, which means that the addend must be adjusted
1475accordingly. */
1476
1477static bfd_boolean
1478elf_metag_relocate_section (bfd *output_bfd,
1479 struct bfd_link_info *info,
1480 bfd *input_bfd,
1481 asection *input_section,
1482 bfd_byte *contents,
1483 Elf_Internal_Rela *relocs,
1484 Elf_Internal_Sym *local_syms,
1485 asection **local_sections)
1486{
1487 bfd_vma *local_got_offsets;
1488 Elf_Internal_Shdr *symtab_hdr;
1489 struct elf_link_hash_entry **eh_syms;
1490 struct elf_metag_link_hash_table *htab;
1491 Elf_Internal_Rela *rel;
1492 Elf_Internal_Rela *relend;
1493 asection *sreloc;
1494
1495 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1496 eh_syms = elf_sym_hashes (input_bfd);
1497 relend = relocs + input_section->reloc_count;
1498
1499 htab = metag_link_hash_table (info);
1500 local_got_offsets = elf_local_got_offsets (input_bfd);
1501
1502 sreloc = NULL;
1503
1504 for (rel = relocs; rel < relend; rel ++)
1505 {
1506 reloc_howto_type *howto;
1507 unsigned long r_symndx;
1508 Elf_Internal_Sym *sym;
1509 asection *sec;
1510 struct elf_metag_link_hash_entry *hh;
1511 bfd_vma relocation;
1512 bfd_reloc_status_type r;
1513 const char *name;
1514 int r_type;
1515
1516 r_type = ELF32_R_TYPE (rel->r_info);
1517
1518 if (r_type == R_METAG_GNU_VTINHERIT
1519 || r_type == R_METAG_GNU_VTENTRY
1520 || r_type == R_METAG_NONE)
1521 continue;
1522
1523 r_symndx = ELF32_R_SYM (rel->r_info);
1524
1525 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1526 hh = NULL;
1527 sym = NULL;
1528 sec = NULL;
1529
1530 if (r_symndx < symtab_hdr->sh_info)
1531 {
1532 sym = local_syms + r_symndx;
1533 sec = local_sections [r_symndx];
1534 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1535
1536 name = bfd_elf_string_from_elf_section
1537 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1538 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1539 }
1540 else
1541 {
1542 struct elf_link_hash_entry *eh;
62d887d4 1543 bfd_boolean unresolved_reloc, warned, ignored;
a3c62988
NC		 1544
1545 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1546 r_symndx, symtab_hdr, eh_syms,
1547 eh, sec, relocation,
62d887d4 1548 unresolved_reloc, warned, ignored);
a3c62988
NC		 1549
1550 name = eh->root.root.string;
1551 hh = (struct elf_metag_link_hash_entry *) eh;
1552 }
1553
1554 if (sec != NULL && discarded_section (sec))
1555 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1556 rel, relend, howto, contents);
1557
1558 if (info->relocatable)
1559 continue;
1560
1561 switch (r_type)
1562 {
1563 case R_METAG_ADDR32:
1564 case R_METAG_RELBRANCH:
1565 if ((input_section->flags & SEC_ALLOC) == 0)
1566 break;
1567
1568 if ((info->shared
1569 && r_symndx != STN_UNDEF
1570 && (input_section->flags & SEC_ALLOC) != 0
1571 && (r_type != R_METAG_RELBRANCH
1572 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1573 || (!info->shared
1574 && hh != NULL
1575 && hh->eh.dynindx != -1
1576 && !hh->eh.non_got_ref
1577 && ((hh->eh.def_dynamic
1578 && !hh->eh.def_regular)
1579 || hh->eh.root.type == bfd_link_hash_undefweak
1580 || hh->eh.root.type == bfd_link_hash_undefined)))
1581 {
1582 Elf_Internal_Rela outrel;
1583 bfd_boolean skip, relocate;
1584 bfd_byte *loc;
1585
1586 /* When generating a shared object, these relocations
1587 are copied into the output file to be resolved at run
1588 time. */
1589
1590 sreloc = elf_section_data (input_section)->sreloc;
1591 BFD_ASSERT (sreloc != NULL);
1592
1593 skip = FALSE;
1594 relocate = FALSE;
1595
1596 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1597 info,
1598 input_section,
1599 rel->r_offset);
1600 if (outrel.r_offset == (bfd_vma) -1)
1601 skip = TRUE;
1602 else if (outrel.r_offset == (bfd_vma) -2)
1603 skip = TRUE, relocate = TRUE;
1604 outrel.r_offset += (input_section->output_section->vma
1605 + input_section->output_offset);
1606
1607 if (skip)
1608 {
1609 memset (&outrel, 0, sizeof outrel);
1610 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1611 }
1612 else if (r_type == R_METAG_RELBRANCH)
1613 {
1614 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1615 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1616 outrel.r_addend = rel->r_addend;
1617 }
1618 else
1619 {
1620 /* h->dynindx may be -1 if this symbol was marked to
1621 become local. */
1622 if (hh == NULL
1623 || ((info->symbolic || hh->eh.dynindx == -1)
1624 && hh->eh.def_regular))
1625 {
1626 relocate = TRUE;
1627 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1628 outrel.r_addend = relocation + rel->r_addend;
1629 }
1630 else
1631 {
1632 BFD_ASSERT (hh->eh.dynindx != -1);
1633 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1634 outrel.r_addend = rel->r_addend;
1635 }
1636 }
1637
1638 loc = sreloc->contents;
1639 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1640 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1641 ++sreloc->reloc_count;
1642
1643 /* If this reloc is against an external symbol, we do
1644 not want to fiddle with the addend. Otherwise, we
1645 need to include the symbol value so that it becomes
1646 an addend for the dynamic reloc. */
1647 if (! relocate)
1648 continue;
1649 }
1650 break;
1651
1652 case R_METAG_RELBRANCH_PLT:
1653 /* Relocation is to the entry for this symbol in the
1654 procedure linkage table. */
1655
1656 if (hh == NULL)
1657 break;
1658
1659 if (hh->eh.forced_local)
1660 break;
1661
1662 if (hh->eh.plt.offset == (bfd_vma) -1 ||
1663 htab->splt == NULL)
1664 {
1665 /* We didn't make a PLT entry for this symbol. This
1666 happens when statically linking PIC code, or when
1667 using -Bsymbolic. */
1668 break;
1669 }
1670
1671 relocation = (htab->splt->output_section->vma
1672 + htab->splt->output_offset
1673 + hh->eh.plt.offset);
1674 break;
1675 case R_METAG_HI16_GOTPC:
1676 case R_METAG_LO16_GOTPC:
1677 BFD_ASSERT (htab->sgot != NULL);
1678
1679 relocation = (htab->sgot->output_section->vma +
1680 htab->sgot->output_offset);
1681 relocation += GOT_REG_OFFSET;
1682 relocation -= (input_section->output_section->vma
1683 + input_section->output_offset
1684 + rel->r_offset);
1685 break;
1686 case R_METAG_HI16_GOTOFF:
1687 case R_METAG_LO16_GOTOFF:
1688 case R_METAG_GETSET_GOTOFF:
1689 BFD_ASSERT (htab->sgot != NULL);
1690
1691 relocation -= (htab->sgot->output_section->vma +
1692 htab->sgot->output_offset);
1693 relocation -= GOT_REG_OFFSET;
1694 break;
1695 case R_METAG_GETSET_GOT:
1696 {
1697 bfd_vma off;
1698 bfd_boolean do_got = 0;
1699
1700 /* Relocation is to the entry for this symbol in the
1701 global offset table. */
1702 if (hh != NULL)
1703 {
1704 bfd_boolean dyn;
1705
1706 off = hh->eh.got.offset;
1707 dyn = htab->etab.dynamic_sections_created;
1708 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
1709 &hh->eh))
1710 {
1711 /* If we aren't going to call finish_dynamic_symbol,
1712 then we need to handle initialisation of the .got
1713 entry and create needed relocs here. Since the
1714 offset must always be a multiple of 4, we use the
1715 least significant bit to record whether we have
1716 initialised it already. */
1717 if ((off & 1) != 0)
1718 off &= ~1;
1719 else
1720 {
1721 hh->eh.got.offset |= 1;
1722 do_got = 1;
1723 }
1724 }
1725 }
1726 else
1727 {
1728 /* Local symbol case. */
1729 if (local_got_offsets == NULL)
1730 abort ();
1731
1732 off = local_got_offsets[r_symndx];
1733
1734 /* The offset must always be a multiple of 4. We use
1735 the least significant bit to record whether we have
1736 already generated the necessary reloc. */
1737 if ((off & 1) != 0)
1738 off &= ~1;
1739 else
1740 {
1741 local_got_offsets[r_symndx] |= 1;
1742 do_got = 1;
1743 }
1744 }
1745
1746 if (do_got)
1747 {
1748 if (info->shared)
1749 {
1750 /* Output a dynamic relocation for this GOT entry.
1751 In this case it is relative to the base of the
1752 object because the symbol index is zero. */
1753 Elf_Internal_Rela outrel;
1754 bfd_byte *loc;
1755 asection *s = htab->srelgot;
1756
1757 outrel.r_offset = (off
1758 + htab->sgot->output_offset
1759 + htab->sgot->output_section->vma);
1760 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1761 outrel.r_addend = relocation;
1762 loc = s->contents;
1763 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1764 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1765 }
1766 else
1767 bfd_put_32 (output_bfd, relocation,
1768 htab->sgot->contents + off);
1769 }
1770
1771 if (off >= (bfd_vma) -2)
1772 abort ();
1773
1774 relocation = off - GOT_REG_OFFSET;
1775 }
1776 break;
1777 case R_METAG_TLS_GD:
1778 case R_METAG_TLS_IE:
1779 {
1780 /* XXXMJF There is room here for optimisations. For example
1781 converting from GD->IE, etc. */
1782 bfd_vma off;
1783 int indx;
1784 char tls_type;
1785
1786 if (htab->sgot == NULL)
1787 abort();
1788
1789 indx = 0;
1790 if (hh != NULL)
1791 {
1792 bfd_boolean dyn;
1793 dyn = htab->etab.dynamic_sections_created;
1794
1795 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, &hh->eh)
1796 && (!info->shared
1797 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1798 {
1799 indx = hh->eh.dynindx;
1800 }
1801 off = hh->eh.got.offset;
1802 tls_type = hh->tls_type;
1803 }
1804 else
1805 {
1806 /* Local symbol case. */
1807 if (local_got_offsets == NULL)
1808 abort ();
1809
1810 off = local_got_offsets[r_symndx];
1811 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1812 }
1813
1814 if (tls_type == GOT_UNKNOWN)
1815 abort();
1816
1817 if ((off & 1) != 0)
1818 off &= ~1;
1819 else
1820 {
1821 bfd_boolean need_relocs = FALSE;
1822 Elf_Internal_Rela outrel;
1823 bfd_byte *loc = NULL;
1824 int cur_off = off;
1825
1826 /* The GOT entries have not been initialized yet. Do it
1827 now, and emit any relocations. If both an IE GOT and a
1828 GD GOT are necessary, we emit the GD first. */
1829
1830 if ((info->shared || indx != 0)
1831 && (hh == NULL
1832 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1833 || hh->eh.root.type != bfd_link_hash_undefweak))
1834 {
1835 need_relocs = TRUE;
1836 loc = htab->srelgot->contents;
1837 /* FIXME (CAO): Should this be reloc_count++ ? */
1838 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
1839 }
1840
1841 if (tls_type & GOT_TLS_GD)
1842 {
1843 if (need_relocs)
1844 {
1845 outrel.r_offset = (cur_off
1846 + htab->sgot->output_section->vma
1847 + htab->sgot->output_offset);
1848 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1849 outrel.r_addend = 0;
1850 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
1851
1852 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1853 htab->srelgot->reloc_count++;
1854 loc += sizeof (Elf32_External_Rela);
1855
1856 if (indx == 0)
1857 bfd_put_32 (output_bfd, 0,
1858 htab->sgot->contents + cur_off + 4);
1859 else
1860 {
1861 bfd_put_32 (output_bfd, 0,
1862 htab->sgot->contents + cur_off + 4);
1863 outrel.r_info = ELF32_R_INFO (indx,
1864 R_METAG_TLS_DTPOFF);
1865 outrel.r_offset += 4;
1866 bfd_elf32_swap_reloca_out (output_bfd,
1867 &outrel, loc);
1868 htab->srelgot->reloc_count++;
1869 loc += sizeof (Elf32_External_Rela);
1870 }
1871 }
1872 else
1873 {
1874 /* We don't support changing the TLS model. */
1875 abort ();
1876 }
1877
1878 cur_off += 8;
1879 }
1880
1881 if (tls_type & GOT_TLS_IE)
1882 {
1883 if (need_relocs)
1884 {
1885 outrel.r_offset = (cur_off
1886 + htab->sgot->output_section->vma
1887 + htab->sgot->output_offset);
1888 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1889
1890 if (indx == 0)
1891 outrel.r_addend = relocation - dtpoff_base (info);
1892 else
1893 outrel.r_addend = 0;
1894
1895 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1896 htab->srelgot->reloc_count++;
1897 loc += sizeof (Elf32_External_Rela);
1898 }
1899 else
1900 bfd_put_32 (output_bfd, tpoff (info, relocation),
1901 htab->sgot->contents + cur_off);
1902
1903 cur_off += 4;
1904 }
1905
1906 if (hh != NULL)
1907 hh->eh.got.offset |= 1;
1908 else
1909 local_got_offsets[r_symndx] |= 1;
1910 }
1911
1912 /* Add the base of the GOT to the relocation value. */
1913 relocation = off - GOT_REG_OFFSET;
1914
1915 break;
1916 }
1917
1918 case R_METAG_TLS_IENONPIC_HI16:
1919 case R_METAG_TLS_IENONPIC_LO16:
1920 case R_METAG_TLS_LE_HI16:
1921 case R_METAG_TLS_LE_LO16:
1922 if (info->shared)
1923 {
1924 (*_bfd_error_handler)
1925 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1926 input_bfd, input_section,
1927 (long) rel->r_offset, howto->name);
1928 return FALSE;
1929 }
1930 else
1931 relocation = tpoff (info, relocation);
1932 break;
1933 case R_METAG_TLS_LDO_HI16:
1934 case R_METAG_TLS_LDO_LO16:
1935 if (! info->shared)
1936 relocation = tpoff (info, relocation);
1937 else
1938 relocation -= dtpoff_base (info);
1939 break;
1940 case R_METAG_TLS_LDM:
1941 {
1942 bfd_vma off;
1943
1944 if (htab->sgot == NULL)
1945 abort();
1946 off = htab->tls_ldm_got.offset;
1947 if (off & 1)
1948 off &= ~1;
1949 else
1950 {
1951 Elf_Internal_Rela outrel;
1952 bfd_byte *loc;
1953
1954 outrel.r_offset = (off
1955 + htab->sgot->output_section->vma
1956 + htab->sgot->output_offset);
1957
1958 outrel.r_addend = 0;
1959 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1960 loc = htab->srelgot->contents;
1961 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1962 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1963 htab->tls_ldm_got.offset |= 1;
1964 }
1965
1966 relocation = off - GOT_REG_OFFSET;
1967 break;
1968 }
1969 default:
1970 break;
1971 }
1972
1973 r = metag_final_link_relocate (howto, input_bfd, input_section,
1974 contents, rel, relocation, hh, htab,
1975 sec);
1976
1977 if (r != bfd_reloc_ok)
1978 {
1979 const char * msg = (const char *) NULL;
1980
1981 switch (r)
1982 {
1983 case bfd_reloc_overflow:
1984 r = info->callbacks->reloc_overflow
1985 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1986 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1987 break;
1988
1989 case bfd_reloc_undefined:
1990 r = info->callbacks->undefined_symbol
1991 (info, name, input_bfd, input_section, rel->r_offset,
1992 TRUE);
1993 break;
1994
1995 case bfd_reloc_outofrange:
1996 msg = _("internal error: out of range error");
1997 break;
1998
1999 case bfd_reloc_notsupported:
2000 msg = _("internal error: unsupported relocation error");
2001 break;
2002
2003 case bfd_reloc_dangerous:
2004 msg = _("internal error: dangerous relocation");
2005 break;
2006
2007 default:
2008 msg = _("internal error: unknown error");
2009 break;
2010 }
2011
2012 if (msg)
2013 r = info->callbacks->warning
2014 (info, msg, name, input_bfd, input_section, rel->r_offset);
2015
2016 if (! r)
2017 return FALSE;
2018 }
2019 }
2020
2021 return TRUE;
2022}
2023
2024/* Create the .plt and .got sections, and set up our hash table
2025 short-cuts to various dynamic sections. */
2026
2027static bfd_boolean
2028elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2029{
2030 struct elf_metag_link_hash_table *htab;
2031 struct elf_link_hash_entry *eh;
2032 struct bfd_link_hash_entry *bh;
2033 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2034
2035 /* Don't try to create the .plt and .got twice. */
2036 htab = metag_link_hash_table (info);
2037 if (htab->splt != NULL)
2038 return TRUE;
2039
2040 /* Call the generic code to do most of the work. */
2041 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2042 return FALSE;
2043
ad1fc92a 2044 htab->sgot = bfd_get_linker_section (abfd, ".got");
a3c62988
NC		 2045 if (! htab->sgot)
2046 return FALSE;
2047
2048 htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt",
2049 (SEC_ALLOC | SEC_LOAD |
2050 SEC_HAS_CONTENTS |
2051 SEC_IN_MEMORY |
2052 SEC_LINKER_CREATED));
2053 if (htab->sgotplt == NULL
2054 || !bfd_set_section_alignment (abfd, htab->sgotplt, 2))
2055 return FALSE;
2056
2057 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2058 section. We don't do this in the linker script because we don't want
2059 to define the symbol if we are not creating a global offset table. */
2060 bh = NULL;
2061 if (!(_bfd_generic_link_add_one_symbol
2062 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot,
2063 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2064 return FALSE;
2065 eh = (struct elf_link_hash_entry *) bh;
2066 eh->def_regular = 1;
2067 eh->type = STT_OBJECT;
2068 eh->other = STV_HIDDEN;
2069
2070 if (! info->executable
2071 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2072 return FALSE;
2073
2074 elf_hash_table (info)->hgot = eh;
2075
ad1fc92a
NC		 2076 htab->splt = bfd_get_linker_section (abfd, ".plt");
2077 htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt");
a3c62988 2078
ad1fc92a 2079 htab->srelgot = bfd_get_linker_section (abfd, ".rela.got");
a3c62988 2080
ad1fc92a
NC		 2081 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
2082 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
a3c62988
NC		 2083
2084 return TRUE;
2085}
2086
2087/* Look through the relocs for a section during the first phase, and
2088 calculate needed space in the global offset table, procedure linkage
2089 table, and dynamic reloc sections. At this point we haven't
2090 necessarily read all the input files. */
2091
2092static bfd_boolean
2093elf_metag_check_relocs (bfd *abfd,
2094 struct bfd_link_info *info,
2095 asection *sec,
2096 const Elf_Internal_Rela *relocs)
2097{
2098 Elf_Internal_Shdr *symtab_hdr;
2099 struct elf_link_hash_entry **eh_syms;
2100 const Elf_Internal_Rela *rel;
2101 const Elf_Internal_Rela *rel_end;
2102 struct elf_metag_link_hash_table *htab;
2103 asection *sreloc;
2104 bfd *dynobj;
2105 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2106
2107 if (info->relocatable)
2108 return TRUE;
2109
2110 htab = metag_link_hash_table (info);
2111 dynobj = htab->etab.dynobj;
2112 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2113 eh_syms = elf_sym_hashes (abfd);
2114 sreloc = NULL;
2115
2116 if (htab == NULL)
2117 return FALSE;
2118
2119 rel_end = relocs + sec->reloc_count;
2120 for (rel = relocs; rel < rel_end; rel++)
2121 {
2122 int r_type;
2123 struct elf_metag_link_hash_entry *hh;
1a18f0ae 2124 Elf_Internal_Sym *isym;
a3c62988
NC		 2125 unsigned long r_symndx;
2126
2127 r_symndx = ELF32_R_SYM (rel->r_info);
2128 r_type = ELF32_R_TYPE (rel->r_info);
2129 if (r_symndx < symtab_hdr->sh_info)
1a18f0ae
NC		 2130 {
2131 /* A local symbol. */
2132 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2133 abfd, r_symndx);
2134 if (isym == NULL)
2135 return FALSE;
2136
2137 hh = NULL;
2138 }
a3c62988
NC		 2139 else
2140 {
1a18f0ae
NC		 2141 isym = NULL;
2142
a3c62988
NC		 2143 hh = (struct elf_metag_link_hash_entry *)
2144 eh_syms[r_symndx - symtab_hdr->sh_info];
2145 while (hh->eh.root.type == bfd_link_hash_indirect
2146 || hh->eh.root.type == bfd_link_hash_warning)
2147 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
81fbe831
AM		 2148
2149 /* PR15323, ref flags aren't set for references in the same
2150 object. */
2151 hh->eh.root.non_ir_ref = 1;
a3c62988
NC		 2152 }
2153
2154 /* Some relocs require a global offset table. */
2155 if (htab->sgot == NULL)
2156 {
2157 switch (r_type)
2158 {
2159 case R_METAG_TLS_GD:
2160 case R_METAG_TLS_LDM:
2161 case R_METAG_TLS_IE:
2162 if (info->shared)
2163 info->flags |= DF_STATIC_TLS;
2164 /* Fall through. */
2165
2166 case R_METAG_HI16_GOTOFF:
2167 case R_METAG_LO16_GOTOFF:
2168 case R_METAG_GETSET_GOTOFF:
2169 case R_METAG_GETSET_GOT:
2170 case R_METAG_HI16_GOTPC:
2171 case R_METAG_LO16_GOTPC:
2172 if (dynobj == NULL)
2173 htab->etab.dynobj = dynobj = abfd;
2174 if (!elf_metag_create_dynamic_sections (dynobj, info))
2175 return FALSE;
2176 break;
2177
2178 default:
2179 break;
2180 }
2181 }
2182
2183 switch (r_type)
2184 {
2185 case R_METAG_TLS_IE:
2186 case R_METAG_TLS_GD:
2187 case R_METAG_GETSET_GOT:
2188 switch (r_type)
2189 {
2190 default:
2191 tls_type = GOT_NORMAL;
2192 break;
2193 case R_METAG_TLS_IE:
2194 tls_type = GOT_TLS_IE;
2195 break;
2196 case R_METAG_TLS_GD:
2197 tls_type = GOT_TLS_GD;
2198 break;
2199 }
2200
2201 if (hh != NULL)
2202 {
2203 hh->eh.got.refcount += 1;
2204 old_tls_type = hh->tls_type;
2205 }
2206 else
2207 {
2208 bfd_signed_vma *local_got_refcounts;
2209
2210 /* This is a global offset table entry for a local
2211 symbol. */
2212 local_got_refcounts = elf_local_got_refcounts (abfd);
2213 if (local_got_refcounts == NULL)
2214 {
2215 bfd_size_type size;
2216
2217 size = symtab_hdr->sh_info;
2218 size *= sizeof (bfd_signed_vma);
2219 /* Add in space to store the local GOT TLS types. */
2220 size += symtab_hdr->sh_info;
2221 local_got_refcounts = ((bfd_signed_vma *)
2222 bfd_zalloc (abfd, size));
2223 if (local_got_refcounts == NULL)
2224 return FALSE;
2225 elf_local_got_refcounts (abfd) = local_got_refcounts;
2226 memset (metag_elf_local_got_tls_type (abfd),
2227 GOT_UNKNOWN, symtab_hdr->sh_info);
2228 }
2229 local_got_refcounts[r_symndx] += 1;
2230 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2231 }
2232
2233 if (old_tls_type != tls_type)
2234 {
2235 if (hh != NULL)
2236 {
2237 hh->tls_type = tls_type;
2238 }
2239 else
2240 {
2241 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2242 }
2243 }
2244
2245 break;
2246
2247 case R_METAG_TLS_LDM:
2248 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2249 break;
2250
2251 case R_METAG_RELBRANCH_PLT:
2252 /* This symbol requires a procedure linkage table entry. We
2253 actually build the entry in adjust_dynamic_symbol,
2254 because this might be a case of linking PIC code without
2255 linking in any dynamic objects, in which case we don't
2256 need to generate a procedure linkage table after all. */
2257
2258 /* If this is a local symbol, we resolve it directly without
2259 creating a procedure linkage table entry. */
2260 if (hh == NULL)
2261 continue;
2262
2263 if (hh->eh.forced_local)
2264 break;
2265
2266 hh->eh.needs_plt = 1;
2267 hh->eh.plt.refcount += 1;
2268 break;
2269
a3c62988
NC		 2270 case R_METAG_HIADDR16:
2271 case R_METAG_LOADDR16:
1a18f0ae
NC		 2272 /* Let's help debug shared library creation. These relocs
2273 cannot be used in shared libs. Don't error out for
2274 sections we don't care about, such as debug sections or
2275 non-constant sections. */
2276 if (info->shared
2277 && (sec->flags & SEC_ALLOC) != 0
2278 && (sec->flags & SEC_READONLY) != 0)
2279 {
2280 const char *name;
2281
2282 if (hh)
2283 name = hh->eh.root.root.string;
2284 else
2285 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2286 (*_bfd_error_handler)
2287 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2288 abfd, elf_metag_howto_table[r_type].name, name);
2289 bfd_set_error (bfd_error_bad_value);
2290 return FALSE;
2291 }
2292
2293 /* Fall through. */
2294 case R_METAG_ADDR32:
a3c62988
NC		 2295 case R_METAG_RELBRANCH:
2296 case R_METAG_GETSETOFF:
2297 if (hh != NULL && !info->shared)
2298 {
2299 hh->eh.non_got_ref = 1;
2300 hh->eh.plt.refcount += 1;
2301 }
2302
2303 /* If we are creating a shared library, and this is a reloc
2304 against a global symbol, or a non PC relative reloc
2305 against a local symbol, then we need to copy the reloc
2306 into the shared library. However, if we are linking with
2307 -Bsymbolic, we do not need to copy a reloc against a
2308 global symbol which is defined in an object we are
2309 including in the link (i.e., DEF_REGULAR is set). At
2310 this point we have not seen all the input files, so it is
2311 possible that DEF_REGULAR is not set now but will be set
2312 later (it is never cleared). We account for that
2313 possibility below by storing information in the
2314 dyn_relocs field of the hash table entry. A similar
2315 situation occurs when creating shared libraries and symbol
2316 visibility changes render the symbol local.
2317
2318 If on the other hand, we are creating an executable, we
2319 may need to keep relocations for symbols satisfied by a
2320 dynamic library if we manage to avoid copy relocs for the
2321 symbol. */
2322 if ((info->shared
2323 && (sec->flags & SEC_ALLOC) != 0
2324 && (r_type != R_METAG_RELBRANCH
2325 || (hh != NULL
2326 && (! info->symbolic
2327 || hh->eh.root.type == bfd_link_hash_defweak
2328 || !hh->eh.def_regular))))
2329 || (!info->shared
2330 && (sec->flags & SEC_ALLOC) != 0
2331 && hh != NULL
2332 && (hh->eh.root.type == bfd_link_hash_defweak
2333 || !hh->eh.def_regular)))
2334 {
2335 struct elf_metag_dyn_reloc_entry *hdh_p;
2336 struct elf_metag_dyn_reloc_entry **hdh_head;
2337
2338 if (dynobj == NULL)
2339 htab->etab.dynobj = dynobj = abfd;
2340
2341 /* When creating a shared object, we must copy these
2342 relocs into the output file. We create a reloc
2343 section in dynobj and make room for the reloc. */
2344 if (sreloc == NULL)
2345 {
2346 sreloc = _bfd_elf_make_dynamic_reloc_section
2347 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2348
2349 if (sreloc == NULL)
2350 {
2351 bfd_set_error (bfd_error_bad_value);
2352 return FALSE;
2353 }
2354
2355 elf_section_data (sec)->sreloc = sreloc;
2356 }
2357
2358 /* If this is a global symbol, we count the number of
2359 relocations we need for this symbol. */
2360 if (hh != NULL)
2361 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2362 else
2363 {
2364 /* Track dynamic relocs needed for local syms too. */
2365 asection *sr;
2366 void *vpp;
a3c62988
NC		 2367
2368 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2369 if (sr == NULL)
2370 sr = sec;
2371
2372 vpp = &elf_section_data (sr)->local_dynrel;
2373 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2374 }
2375
2376 hdh_p = *hdh_head;
2377 if (hdh_p == NULL || hdh_p->sec != sec)
2378 {
2379 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2380 bfd_alloc (dynobj, sizeof *hdh_p));
2381 if (hdh_p == NULL)
2382 return FALSE;
2383 hdh_p->hdh_next = *hdh_head;
2384 *hdh_head = hdh_p;
2385 hdh_p->sec = sec;
2386 hdh_p->count = 0;
2387 hdh_p->relative_count = 0;
2388 }
2389
2390 hdh_p->count += 1;
2391 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2392 hdh_p->relative_count += 1;
2393 }
2394 break;
2395
2396 /* This relocation describes the C++ object vtable hierarchy.
2397 Reconstruct it for later use during GC. */
2398 case R_METAG_GNU_VTINHERIT:
2399 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2400 rel->r_offset))
2401 return FALSE;
2402 break;
2403
2404 /* This relocation describes which C++ vtable entries are actually
2405 used. Record for later use during GC. */
2406 case R_METAG_GNU_VTENTRY:
2407 BFD_ASSERT (hh != NULL);
2408 if (hh != NULL
2409 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2410 return FALSE;
2411 break;
2412 }
2413 }
2414
2415 return TRUE;
2416}
2417
2418/* Copy the extra info we tack onto an elf_link_hash_entry. */
2419
2420static void
2421elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2422 struct elf_link_hash_entry *eh_dir,
2423 struct elf_link_hash_entry *eh_ind)
2424{
2425 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2426
2427 hh_dir = metag_elf_hash_entry (eh_dir);
2428 hh_ind = metag_elf_hash_entry (eh_ind);
2429
2430 if (hh_ind->dyn_relocs != NULL)
2431 {
2432 if (hh_dir->dyn_relocs != NULL)
2433 {
2434 struct elf_metag_dyn_reloc_entry **hdh_pp;
2435 struct elf_metag_dyn_reloc_entry *hdh_p;
2436
2437 if (eh_ind->root.type == bfd_link_hash_indirect)
2438 abort ();
2439
2440 /* Add reloc counts against the weak sym to the strong sym
2441 list. Merge any entries against the same section. */
2442 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2443 {
2444 struct elf_metag_dyn_reloc_entry *hdh_q;
2445
2446 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2447 hdh_q = hdh_q->hdh_next)
2448 if (hdh_q->sec == hdh_p->sec)
2449 {
2450 hdh_q->relative_count += hdh_p->relative_count;
2451 hdh_q->count += hdh_p->count;
2452 *hdh_pp = hdh_p->hdh_next;
2453 break;
2454 }
2455 if (hdh_q == NULL)
2456 hdh_pp = &hdh_p->hdh_next;
2457 }
2458 *hdh_pp = hh_dir->dyn_relocs;
2459 }
2460
2461 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2462 hh_ind->dyn_relocs = NULL;
2463 }
2464
2465 if (eh_ind->root.type == bfd_link_hash_indirect
2466 && eh_dir->got.refcount <= 0)
2467 {
2468 hh_dir->tls_type = hh_ind->tls_type;
2469 hh_ind->tls_type = GOT_UNKNOWN;
2470 }
2471
2472 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2473}
2474
2475/* Adjust a symbol defined by a dynamic object and referenced by a
2476 regular object. The current definition is in some section of the
2477 dynamic object, but we're not including those sections. We have to
2478 change the definition to something the rest of the link can
2479 understand. */
2480
2481static bfd_boolean
2482elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2483 struct elf_link_hash_entry *eh)
2484{
2485 struct elf_metag_link_hash_table *htab;
2486 struct elf_metag_link_hash_entry *hh;
2487 struct elf_metag_dyn_reloc_entry *hdh_p;
2488 asection *s;
2489
2490 /* If this is a function, put it in the procedure linkage table. We
2491 will fill in the contents of the procedure linkage table later,
2492 when we know the address of the .got section. */
2493 if (eh->type == STT_FUNC
2494 || eh->needs_plt)
2495 {
2496 if (eh->plt.refcount <= 0
2497 || SYMBOL_CALLS_LOCAL (info, eh)
2498 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2499 && eh->root.type == bfd_link_hash_undefweak))
2500 {
2501 /* This case can occur if we saw a PLT reloc in an input
2502 file, but the symbol was never referred to by a dynamic
2503 object. In such a case, we don't actually need to build
2504 a procedure linkage table, and we can just do a PCREL
2505 reloc instead. */
2506 eh->plt.offset = (bfd_vma) -1;
2507 eh->needs_plt = 0;
2508 }
2509
2510 return TRUE;
2511 }
2512 else
2513 eh->plt.offset = (bfd_vma) -1;
2514
2515 /* If this is a weak symbol, and there is a real definition, the
2516 processor independent code will have arranged for us to see the
2517 real definition first, and we can just use the same value. */
2518 if (eh->u.weakdef != NULL)
2519 {
2520 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2521 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2522 abort ();
2523 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2524 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2525 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2526 return TRUE;
2527 }
2528
2529 /* This is a reference to a symbol defined by a dynamic object which
2530 is not a function. */
2531
2532 /* If we are creating a shared library, we must presume that the
2533 only references to the symbol are via the global offset table.
2534 For such cases we need not do anything here; the relocations will
2535 be handled correctly by relocate_section. */
2536 if (info->shared)
2537 return TRUE;
2538
2539 /* If there are no references to this symbol that do not use the
2540 GOT, we don't need to generate a copy reloc. */
2541 if (!eh->non_got_ref)
2542 return TRUE;
2543
2544 /* If -z nocopyreloc was given, we won't generate them either. */
2545 if (info->nocopyreloc)
2546 {
2547 eh->non_got_ref = 0;
2548 return TRUE;
2549 }
2550
2551 hh = (struct elf_metag_link_hash_entry *) eh;
2552 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2553 {
2554 s = hdh_p->sec->output_section;
2555 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2556 break;
2557 }
2558
2559 /* If we didn't find any dynamic relocs in read-only sections, then
2560 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2561 if (hdh_p == NULL)
2562 {
2563 eh->non_got_ref = 0;
2564 return TRUE;
2565 }
2566
a3c62988
NC		 2567 /* We must allocate the symbol in our .dynbss section, which will
2568 become part of the .bss section of the executable. There will be
2569 an entry for this symbol in the .dynsym section. The dynamic
2570 object will contain position independent code, so all references
2571 from the dynamic object to this symbol will go through the global
2572 offset table. The dynamic linker will use the .dynsym entry to
2573 determine the address it must put in the global offset table, so
2574 both the dynamic object and the regular object will refer to the
2575 same memory location for the variable. */
2576
2577 htab = metag_link_hash_table (info);
2578
2579 /* We must generate a COPY reloc to tell the dynamic linker to
2580 copy the initial value out of the dynamic object and into the
2581 runtime process image. */
34c67f14 2582 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
a3c62988
NC		 2583 {
2584 htab->srelbss->size += sizeof (Elf32_External_Rela);
2585 eh->needs_copy = 1;
2586 }
2587
2588 s = htab->sdynbss;
2589
6cabe1ea 2590 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
a3c62988
NC		 2591}
2592
2593/* Allocate space in .plt, .got and associated reloc sections for
2594 global syms. */
2595
2596static bfd_boolean
2597allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2598{
2599 struct bfd_link_info *info;
2600 struct elf_metag_link_hash_table *htab;
2601 struct elf_metag_link_hash_entry *hh;
2602 struct elf_metag_dyn_reloc_entry *hdh_p;
2603
2604 if (eh->root.type == bfd_link_hash_indirect)
2605 return TRUE;
2606
2607 if (eh->root.type == bfd_link_hash_warning)
2608 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2609
2610 info = inf;
2611 htab = metag_link_hash_table (info);
2612
2613 if (htab->etab.dynamic_sections_created
2614 && eh->plt.refcount > 0)
2615 {
2616 /* Make sure this symbol is output as a dynamic symbol.
2617 Undefined weak syms won't yet be marked as dynamic. */
2618 if (eh->dynindx == -1
2619 && !eh->forced_local)
2620 {
2621 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2622 return FALSE;
2623 }
2624
2625 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, eh))
2626 {
2627 asection *s = htab->splt;
2628
2629 /* If this is the first .plt entry, make room for the special
2630 first entry. */
2631 if (s->size == 0)
2632 s->size += PLT_ENTRY_SIZE;
2633
2634 eh->plt.offset = s->size;
2635
2636 /* If this symbol is not defined in a regular file, and we are
2637 not generating a shared library, then set the symbol to this
2638 location in the .plt. This is required to make function
2639 pointers compare as equal between the normal executable and
2640 the shared library. */
2641 if (! info->shared
2642 && !eh->def_regular)
2643 {
2644 eh->root.u.def.section = s;
2645 eh->root.u.def.value = eh->plt.offset;
2646 }
2647
2648 /* Make room for this entry. */
2649 s->size += PLT_ENTRY_SIZE;
2650
2651 /* We also need to make an entry in the .got.plt section, which
2652 will be placed in the .got section by the linker script. */
2653 htab->sgotplt->size += 4;
2654
2655 /* We also need to make an entry in the .rel.plt section. */
2656 htab->srelplt->size += sizeof (Elf32_External_Rela);
2657 }
2658 else
2659 {
2660 eh->plt.offset = (bfd_vma) -1;
2661 eh->needs_plt = 0;
2662 }
2663 }
2664 else
2665 {
2666 eh->plt.offset = (bfd_vma) -1;
2667 eh->needs_plt = 0;
2668 }
2669
2670 if (eh->got.refcount > 0)
2671 {
2672 asection *s;
2673 bfd_boolean dyn;
2674 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2675
2676 /* Make sure this symbol is output as a dynamic symbol.
2677 Undefined weak syms won't yet be marked as dynamic. */
2678 if (eh->dynindx == -1
2679 && !eh->forced_local)
2680 {
2681 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2682 return FALSE;
2683 }
2684
2685 s = htab->sgot;
2686
2687 eh->got.offset = s->size;
2688 s->size += 4;
2689 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2690 if (tls_type == GOT_TLS_GD)
2691 s->size += 4;
2692 dyn = htab->etab.dynamic_sections_created;
2693 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2694 R_METAG_TLS_GD needs one if local symbol and two if global. */
2695 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2696 || (tls_type == GOT_TLS_IE && dyn))
2697 htab->srelgot->size += sizeof (Elf32_External_Rela);
2698 else if (tls_type == GOT_TLS_GD)
2699 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2700 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, eh))
2701 htab->srelgot->size += sizeof (Elf32_External_Rela);
2702 }
2703 else
2704 eh->got.offset = (bfd_vma) -1;
2705
2706 hh = (struct elf_metag_link_hash_entry *) eh;
2707 if (hh->dyn_relocs == NULL)
2708 return TRUE;
2709
2710 /* If this is a -Bsymbolic shared link, then we need to discard all
2711 space allocated for dynamic pc-relative relocs against symbols
2712 defined in a regular object. For the normal shared case, discard
2713 space for relocs that have become local due to symbol visibility
2714 changes. */
2715 if (info->shared)
2716 {
2717 if (SYMBOL_CALLS_LOCAL (info, eh))
2718 {
2719 struct elf_metag_dyn_reloc_entry **hdh_pp;
2720
2721 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2722 {
2723 hdh_p->count -= hdh_p->relative_count;
2724 hdh_p->relative_count = 0;
2725 if (hdh_p->count == 0)
2726 *hdh_pp = hdh_p->hdh_next;
2727 else
2728 hdh_pp = &hdh_p->hdh_next;
2729 }
2730 }
2731
2732 /* Also discard relocs on undefined weak syms with non-default
2733 visibility. */
2734 if (hh->dyn_relocs != NULL
2735 && eh->root.type == bfd_link_hash_undefweak)
2736 {
2737 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2738 hh->dyn_relocs = NULL;
2739
2740 /* Make sure undefined weak symbols are output as a dynamic
2741 symbol in PIEs. */
2742 else if (eh->dynindx == -1
2743 && !eh->forced_local)
2744 {
2745 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2746 return FALSE;
2747 }
2748 }
2749 }
2750 else
2751 {
2752 /* For the non-shared case, discard space for relocs against
2753 symbols which turn out to need copy relocs or are not
2754 dynamic. */
2755 if (!eh->non_got_ref
2756 && ((eh->def_dynamic
2757 && !eh->def_regular)
2758 || (htab->etab.dynamic_sections_created
2759 && (eh->root.type == bfd_link_hash_undefweak
2760 || eh->root.type == bfd_link_hash_undefined))))
2761 {
2762 /* Make sure this symbol is output as a dynamic symbol.
2763 Undefined weak syms won't yet be marked as dynamic. */
2764 if (eh->dynindx == -1
2765 && !eh->forced_local)
2766 {
2767 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2768 return FALSE;
2769 }
2770
2771 /* If that succeeded, we know we'll be keeping all the
2772 relocs. */
2773 if (eh->dynindx != -1)
2774 goto keep;
2775 }
2776
2777 hh->dyn_relocs = NULL;
2778 return TRUE;
2779
2780 keep: ;
2781 }
2782
2783 /* Finally, allocate space. */
2784 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2785 {
2786 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2787 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2788 }
2789
2790 return TRUE;
2791}
2792
2793/* Find any dynamic relocs that apply to read-only sections. */
2794
2795static bfd_boolean
2796readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2797{
2798 struct elf_metag_link_hash_entry *hh;
2799 struct elf_metag_dyn_reloc_entry *hdh_p;
2800
2801 if (eh->root.type == bfd_link_hash_warning)
2802 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2803
2804 hh = (struct elf_metag_link_hash_entry *) eh;
2805 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2806 {
2807 asection *s = hdh_p->sec->output_section;
2808
2809 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2810 {
2811 struct bfd_link_info *info = inf;
2812
2813 info->flags |= DF_TEXTREL;
2814
2815 /* Not an error, just cut short the traversal. */
2816 return FALSE;
2817 }
2818 }
2819 return TRUE;
2820}
2821
2822/* Set the sizes of the dynamic sections. */
2823
2824static bfd_boolean
2825elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2826 struct bfd_link_info *info)
2827{
2828 struct elf_metag_link_hash_table *htab;
2829 bfd *dynobj;
2830 bfd *ibfd;
2831 asection *s;
2832 bfd_boolean relocs;
2833
2834 htab = metag_link_hash_table (info);
2835 dynobj = htab->etab.dynobj;
2836 if (dynobj == NULL)
2837 abort ();
2838
2839 if (htab->etab.dynamic_sections_created)
2840 {
2841 /* Set the contents of the .interp section to the interpreter. */
2842 if (info->executable)
2843 {
ad1fc92a 2844 s = bfd_get_linker_section (dynobj, ".interp");
a3c62988
NC		 2845 if (s == NULL)
2846 abort ();
2847 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2848 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2849 }
2850 }
2851
2852 /* Set up .got offsets for local syms, and space for local dynamic
2853 relocs. */
c72f2fb2 2854 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
a3c62988
NC		 2855 {
2856 bfd_signed_vma *local_got;
2857 bfd_signed_vma *end_local_got;
2858 bfd_size_type locsymcount;
2859 Elf_Internal_Shdr *symtab_hdr;
2860 asection *srel;
2861 char *local_tls_type;
2862
2863 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2864 continue;
2865
2866 for (s = ibfd->sections; s != NULL; s = s->next)
2867 {
2868 struct elf_metag_dyn_reloc_entry *hdh_p;
2869
2870 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2871 elf_section_data (s)->local_dynrel);
2872 hdh_p != NULL;
2873 hdh_p = hdh_p->hdh_next)
2874 {
2875 if (!bfd_is_abs_section (hdh_p->sec)
2876 && bfd_is_abs_section (hdh_p->sec->output_section))
2877 {
2878 /* Input section has been discarded, either because
2879 it is a copy of a linkonce section or due to
2880 linker script /DISCARD/, so we'll be discarding
2881 the relocs too. */
2882 }
2883 else if (hdh_p->count != 0)
2884 {
2885 srel = elf_section_data (hdh_p->sec)->sreloc;
2886 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2887 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2888 info->flags |= DF_TEXTREL;
2889 }
2890 }
2891 }
2892
2893 local_got = elf_local_got_refcounts (ibfd);
2894 if (!local_got)
2895 continue;
2896
2897 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2898 locsymcount = symtab_hdr->sh_info;
2899 end_local_got = local_got + locsymcount;
2900 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2901 s = htab->sgot;
2902 srel = htab->srelgot;
2903 for (; local_got < end_local_got; ++local_got)
2904 {
2905 if (*local_got > 0)
2906 {
2907 *local_got = s->size;
2908 s->size += GOT_ENTRY_SIZE;
2909 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2910 if (*local_tls_type == GOT_TLS_GD)
2911 s->size += 4;
2912 if (info->shared)
2913 srel->size += sizeof (Elf32_External_Rela);
2914 }
2915 else
2916 *local_got = (bfd_vma) -1;
2917 ++local_tls_type;
2918 }
2919 }
2920
2921 if (htab->tls_ldm_got.refcount > 0)
2922 {
2923 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2924 reloc. */
2925 htab->tls_ldm_got.offset = htab->sgot->size;
2926 htab->sgot->size += 8;
2927 htab->srelgot->size += sizeof (Elf32_External_Rela);
2928 }
2929 else
2930 htab->tls_ldm_got.offset = -1;
2931
2932 /* Allocate global sym .plt and .got entries, and space for global
2933 sym dynamic relocs. */
2934 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2935
2936 /* We now have determined the sizes of the various dynamic sections.
2937 Allocate memory for them. */
2938 relocs = FALSE;
2939 for (s = dynobj->sections; s != NULL; s = s->next)
2940 {
2941 bfd_boolean reloc_section = FALSE;
2942
2943 if ((s->flags & SEC_LINKER_CREATED) == 0)
2944 continue;
2945
2946 if (s == htab->splt
2947 || s == htab->sgot
2948 || s == htab->sgotplt
2949 || s == htab->sdynbss)
2950 {
2951 /* Strip this section if we don't need it; see the
2952 comment below. */
2953 }
2954 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2955 {
2956 if (s->size != 0 && s != htab->srelplt)
2957 relocs = TRUE;
2958
2959 /* We use the reloc_count field as a counter if we need
2960 to copy relocs into the output file. */
2961 s->reloc_count = 0;
2962 reloc_section = TRUE;
2963 }
2964 else
2965 {
2966 /* It's not one of our sections, so don't allocate space. */
2967 continue;
2968 }
2969
2970 if (s->size == 0)
2971 {
2972 /* If we don't need this section, strip it from the
2973 output file. This is mostly to handle .rela.bss and
2974 .rela.plt. We must create both sections in
2975 create_dynamic_sections, because they must be created
2976 before the linker maps input sections to output
2977 sections. The linker does that before
2978 adjust_dynamic_symbol is called, and it is that
2979 function which decides whether anything needs to go
2980 into these sections. */
2981 s->flags |= SEC_EXCLUDE;
2982 continue;
2983 }
2984
2985 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2986 continue;
2987
2988 /* Allocate memory for the section contents. */
2989 s->contents = bfd_zalloc (dynobj, s->size);
2990 if (s->contents == NULL)
2991 return FALSE;
2992 else if (reloc_section)
2993 {
2994 unsigned char *contents = s->contents;
2995 Elf32_External_Rela reloc;
2996
2997 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2998 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2999 reloc.r_info[0] = R_METAG_NONE;
3000 for (; contents < (s->contents + s->size);
3001 contents += sizeof(Elf32_External_Rela))
3002 {
3003 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3004 }
3005 }
3006 }
3007
3008 if (htab->etab.dynamic_sections_created)
3009 {
3010 /* Add some entries to the .dynamic section. We fill in the
3011 values later, in elf_metag_finish_dynamic_sections, but we
3012 must add the entries now so that we get the correct size for
3013 the .dynamic section. The DT_DEBUG entry is filled in by the
3014 dynamic linker and used by the debugger. */
3015#define add_dynamic_entry(TAG, VAL) \
3016 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3017
3018 if (!add_dynamic_entry (DT_PLTGOT, 0))
3019 return FALSE;
3020
3021 if (info->executable)
3022 {
3023 if (!add_dynamic_entry (DT_DEBUG, 0))
3024 return FALSE;
3025 }
3026
3027 if (htab->srelplt->size != 0)
3028 {
3029 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3030 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3031 || !add_dynamic_entry (DT_JMPREL, 0))
3032 return FALSE;
3033 }
3034
3035 if (relocs)
3036 {
3037 if (!add_dynamic_entry (DT_RELA, 0)
3038 || !add_dynamic_entry (DT_RELASZ, 0)
3039 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3040 return FALSE;
3041
3042 /* If any dynamic relocs apply to a read-only section,
3043 then we need a DT_TEXTREL entry. */
3044 if ((info->flags & DF_TEXTREL) == 0)
3045 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3046
3047 if ((info->flags & DF_TEXTREL) != 0)
3048 {
3049 if (!add_dynamic_entry (DT_TEXTREL, 0))
3050 return FALSE;
3051 }
3052 }
3053 }
3054#undef add_dynamic_entry
3055
3056 return TRUE;
3057}
3058
3059/* Finish up dynamic symbol handling. We set the contents of various
3060 dynamic sections here. */
3061
3062static bfd_boolean
3063elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3064 struct bfd_link_info *info,
3065 struct elf_link_hash_entry *eh,
3066 Elf_Internal_Sym *sym)
3067{
3068 struct elf_metag_link_hash_table *htab;
3069 Elf_Internal_Rela rel;
3070 bfd_byte *loc;
3071
3072 htab = metag_link_hash_table (info);
3073
3074 if (eh->plt.offset != (bfd_vma) -1)
3075 {
3076 asection *splt;
3077 asection *sgot;
3078 asection *srela;
3079
3080 bfd_vma plt_index;
3081 bfd_vma got_offset;
3082 bfd_vma got_entry;
3083
3084 if (eh->plt.offset & 1)
3085 abort ();
3086
3087 BFD_ASSERT (eh->dynindx != -1);
3088
3089 splt = htab->splt;
3090 sgot = htab->sgotplt;
3091 srela = htab->srelplt;
3092 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3093
3094 /* Get the index in the procedure linkage table which
3095 corresponds to this symbol. This is the index of this symbol
3096 in all the symbols for which we are making plt entries. The
3097 first entry in the procedure linkage table is reserved. */
3098 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3099
3100 /* Get the offset into the .got.plt table of the entry that
3101 corresponds to this function. */
3102 got_offset = plt_index * GOT_ENTRY_SIZE;
3103
3104 BFD_ASSERT (got_offset < (1 << 16));
3105
3106 got_entry = sgot->output_section->vma
3107 + sgot->output_offset
3108 + got_offset;
3109
3110 BFD_ASSERT (plt_index < (1 << 16));
3111
3112 /* Fill in the entry in the procedure linkage table. */
3113 if (! info->shared)
3114 {
3115 bfd_put_32 (output_bfd,
3116 (plt_entry[0]
3117 | (((got_entry >> 16) & 0xffff) << 3)),
3118 splt->contents + eh->plt.offset);
3119 bfd_put_32 (output_bfd,
3120 (plt_entry[1]
3121 | ((got_entry & 0xffff) << 3)),
3122 splt->contents + eh->plt.offset + 4);
3123 bfd_put_32 (output_bfd, plt_entry[2],
3124 splt->contents + eh->plt.offset + 8);
3125 bfd_put_32 (output_bfd,
3126 (plt_entry[3] | (plt_index << 3)),
3127 splt->contents + eh->plt.offset + 12);
3128 bfd_put_32 (output_bfd,
3129 (plt_entry[4]
3130 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3131 splt->contents + eh->plt.offset + 16);
3132 }
3133 else
3134 {
3135 bfd_vma addr = got_entry - (splt->output_section->vma +
3136 splt->output_offset + eh->plt.offset);
3137
3138 bfd_put_32 (output_bfd,
3139 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3140 splt->contents + eh->plt.offset);
3141 bfd_put_32 (output_bfd,
3142 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3143 splt->contents + eh->plt.offset + 4);
3144 bfd_put_32 (output_bfd, plt_pic_entry[2],
3145 splt->contents + eh->plt.offset + 8);
3146 bfd_put_32 (output_bfd,
3147 (plt_pic_entry[3] | (plt_index << 3)),
3148 splt->contents + eh->plt.offset + 12);
3149 bfd_put_32 (output_bfd,
3150 (plt_pic_entry[4]
3151 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3152 splt->contents + eh->plt.offset + 16);
3153 }
3154
3155 /* Fill in the entry in the global offset table. */
3156 bfd_put_32 (output_bfd,
3157 (splt->output_section->vma
3158 + splt->output_offset
3159 + eh->plt.offset
3160 + 12), /* offset within PLT entry */
3161 sgot->contents + got_offset);
3162
3163 /* Fill in the entry in the .rela.plt section. */
3164 rel.r_offset = (sgot->output_section->vma
3165 + sgot->output_offset
3166 + got_offset);
3167 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3168 rel.r_addend = 0;
3169 loc = htab->srelplt->contents;
3170 loc += plt_index * sizeof(Elf32_External_Rela);
3171 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3172
3173 if (!eh->def_regular)
3174 {
3175 /* Mark the symbol as undefined, rather than as defined in
3176 the .plt section. Leave the value alone. */
3177 sym->st_shndx = SHN_UNDEF;
3178 }
3179 }
3180
3181 if (eh->got.offset != (bfd_vma) -1
3182 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3183 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3184 {
3185 /* This symbol has an entry in the global offset table. Set it
3186 up. */
3187
3188 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3189 + htab->sgot->output_offset
3190 + htab->sgot->output_section->vma);
3191
3192 /* If this is a -Bsymbolic link and the symbol is defined
3193 locally or was forced to be local because of a version file,
3194 we just want to emit a RELATIVE reloc. The entry in the
3195 global offset table will already have been initialized in the
3196 relocate_section function. */
3197 if (info->shared
3198 && (info->symbolic || eh->dynindx == -1)
3199 && eh->def_regular)
3200 {
3201 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3202 rel.r_addend = (eh->root.u.def.value
3203 + eh->root.u.def.section->output_offset
3204 + eh->root.u.def.section->output_section->vma);
3205 }
3206 else
3207 {
3208 if ((eh->got.offset & 1) != 0)
3209 abort ();
3210 bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset);
3211 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3212 rel.r_addend = 0;
3213 }
3214
3215 loc = htab->srelgot->contents;
3216 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3217 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3218 }
3219
3220 if (eh->needs_copy)
3221 {
3222 asection *s;
3223
3224 /* This symbol needs a copy reloc. Set it up. */
3225
3226 if (! (eh->dynindx != -1
3227 && (eh->root.type == bfd_link_hash_defined
3228 || eh->root.type == bfd_link_hash_defweak)))
3229 abort ();
3230
3231 s = htab->srelbss;
3232
3233 rel.r_offset = (eh->root.u.def.value
3234 + eh->root.u.def.section->output_offset
3235 + eh->root.u.def.section->output_section->vma);
3236 rel.r_addend = 0;
3237 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3238 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3239 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3240 }
3241
3242 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3243 if (eh->root.root.string[0] == '_'
3244 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3245 || eh == htab->etab.hgot))
3246 {
3247 sym->st_shndx = SHN_ABS;
3248 }
3249
3250 return TRUE;
3251}
3252
3253/* Set the Meta ELF ABI version. */
3254
3255static void
df3ce959 3256elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
a3c62988
NC		 3257{
3258 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3259
df3ce959 3260 _bfd_elf_post_process_headers (abfd, link_info);
a3c62988
NC		 3261 i_ehdrp = elf_elfheader (abfd);
3262 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3263}
3264
3265/* Used to decide how to sort relocs in an optimal manner for the
3266 dynamic linker, before writing them out. */
3267
3268static enum elf_reloc_type_class
7e612e98
AM		 3269elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3270 const asection *rel_sec ATTRIBUTE_UNUSED,
3271 const Elf_Internal_Rela *rela)
a3c62988
NC		 3272{
3273 switch ((int) ELF32_R_TYPE (rela->r_info))
3274 {
3275 case R_METAG_RELATIVE:
3276 return reloc_class_relative;
3277 case R_METAG_JMP_SLOT:
3278 return reloc_class_plt;
3279 case R_METAG_COPY:
3280 return reloc_class_copy;
3281 default:
3282 return reloc_class_normal;
3283 }
3284}
3285
3286/* Finish up the dynamic sections. */
3287
3288static bfd_boolean
3289elf_metag_finish_dynamic_sections (bfd *output_bfd,
3290 struct bfd_link_info *info)
3291{
3292 bfd *dynobj;
3293 struct elf_metag_link_hash_table *htab;
3294 asection *sdyn;
3295
3296 htab = metag_link_hash_table (info);
3297 dynobj = htab->etab.dynobj;
3298
ad1fc92a 3299 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
a3c62988
NC		 3300
3301 if (htab->etab.dynamic_sections_created)
3302 {
3303 asection *splt;
3304 Elf32_External_Dyn *dyncon, *dynconend;
3305
3306 if (sdyn == NULL)
3307 abort ();
3308
3309 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3310 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3311 for (; dyncon < dynconend; dyncon++)
3312 {
3313 Elf_Internal_Dyn dyn;
3314 asection *s;
3315
3316 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3317
3318 switch (dyn.d_tag)
3319 {
3320 default:
3321 continue;
3322
3323 case DT_PLTGOT:
3324 s = htab->sgot->output_section;
3325 BFD_ASSERT (s != NULL);
3326 dyn.d_un.d_ptr = s->vma + htab->sgot->output_offset;
3327 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3328 break;
3329
3330 case DT_JMPREL:
3331 s = htab->srelplt->output_section;
3332 BFD_ASSERT (s != NULL);
3333 dyn.d_un.d_ptr = s->vma;
3334 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3335 break;
3336
3337 case DT_PLTRELSZ:
3338 s = htab->srelplt;
3339 dyn.d_un.d_val = s->size;
3340 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3341 break;
3342
3343 case DT_RELASZ:
3344 /* Don't count procedure linkage table relocs in the
3345 overall reloc count. */
3346 if (htab->srelplt) {
3347 s = htab->srelplt;
3348 dyn.d_un.d_val -= s->size;
3349 }
3350 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3351 break;
3352
3353 case DT_RELA:
3354 /* We may not be using the standard ELF linker script.
3355 If .rela.plt is the first .rela section, we adjust
3356 DT_RELA to not include it. */
3357 if (htab->srelplt) {
3358 s = htab->srelplt;
3359 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3360 dyn.d_un.d_ptr += s->size;
3361 }
3362 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3363 break;
3364 }
3365
3366 }
3367
3368 /* Fill in the first entry in the procedure linkage table. */
3369 splt = htab->splt;
3370 if (splt && splt->size > 0)
3371 {
3372 unsigned long addr;
3373 /* addr = .got + 4 */
3374 addr = htab->sgot->output_section->vma +
3375 htab->sgot->output_offset + 4;
3376 if (info->shared)
3377 {
3378 addr -= splt->output_section->vma + splt->output_offset;
3379 bfd_put_32 (output_bfd,
3380 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3381 splt->contents);
3382 bfd_put_32 (output_bfd,
3383 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3384 splt->contents + 4);
3385 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3386 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3387 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3388 }
3389 else
3390 {
3391 bfd_put_32 (output_bfd,
3392 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3393 splt->contents);
3394 bfd_put_32 (output_bfd,
3395 plt0_entry[1] | ((addr & 0xffff) << 3),
3396 splt->contents + 4);
3397 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3398 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3399 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3400 }
3401
3402 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3403 PLT_ENTRY_SIZE;
3404 }
3405 }
3406
3407 if (htab->sgot != NULL && htab->sgot->size != 0)
3408 {
3409 /* Fill in the first entry in the global offset table.
3410 We use it to point to our dynamic section, if we have one. */
3411 bfd_put_32 (output_bfd,
3412 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3413 htab->sgot->contents);
3414
3415 /* The second entry is reserved for use by the dynamic linker. */
3416 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3417
3418 /* Set .got entry size. */
3419 elf_section_data (htab->sgot->output_section)
3420 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3421 }
3422
3423 return TRUE;
3424}
3425
3426/* Return the section that should be marked against GC for a given
3427 relocation. */
3428
3429static asection *
3430elf_metag_gc_mark_hook (asection *sec,
3431 struct bfd_link_info *info,
3432 Elf_Internal_Rela *rela,
3433 struct elf_link_hash_entry *hh,
3434 Elf_Internal_Sym *sym)
3435{
3436 if (hh != NULL)
3437 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3438 {
3439 case R_METAG_GNU_VTINHERIT:
3440 case R_METAG_GNU_VTENTRY:
3441 return NULL;
3442 }
3443
3444 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3445}
3446
3447/* Update the got and plt entry reference counts for the section being
3448 removed. */
3449
3450static bfd_boolean
3451elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3452 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3453 asection *sec ATTRIBUTE_UNUSED,
3454 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3455{
3456 Elf_Internal_Shdr *symtab_hdr;
3457 struct elf_link_hash_entry **eh_syms;
3458 bfd_signed_vma *local_got_refcounts;
3459 bfd_signed_vma *local_plt_refcounts;
3460 const Elf_Internal_Rela *rel, *relend;
3461
3462 if (info->relocatable)
3463 return TRUE;
3464
3465 elf_section_data (sec)->local_dynrel = NULL;
3466
3467 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3468 eh_syms = elf_sym_hashes (abfd);
3469 local_got_refcounts = elf_local_got_refcounts (abfd);
3470 local_plt_refcounts = local_got_refcounts;
3471 if (local_plt_refcounts != NULL)
3472 local_plt_refcounts += symtab_hdr->sh_info;
3473
3474 relend = relocs + sec->reloc_count;
3475 for (rel = relocs; rel < relend; rel++)
3476 {
3477 unsigned long r_symndx;
3478 unsigned int r_type;
3479 struct elf_link_hash_entry *eh = NULL;
3480
3481 r_symndx = ELF32_R_SYM (rel->r_info);
3482 if (r_symndx >= symtab_hdr->sh_info)
3483 {
3484 struct elf_metag_link_hash_entry *hh;
3485 struct elf_metag_dyn_reloc_entry **hdh_pp;
3486 struct elf_metag_dyn_reloc_entry *hdh_p;
3487
3488 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3489 while (eh->root.type == bfd_link_hash_indirect
3490 || eh->root.type == bfd_link_hash_warning)
3491 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3492 hh = (struct elf_metag_link_hash_entry *) eh;
3493
3494 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3495 hdh_pp = &hdh_p->hdh_next)
3496 if (hdh_p->sec == sec)
3497 {
3498 /* Everything must go for SEC. */
3499 *hdh_pp = hdh_p->hdh_next;
3500 break;
3501 }
3502 }
3503
3504 r_type = ELF32_R_TYPE (rel->r_info);
3505 switch (r_type)
3506 {
3507 case R_METAG_TLS_LDM:
3508 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3509 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3510 break;
3511 case R_METAG_TLS_IE:
3512 case R_METAG_TLS_GD:
3513 case R_METAG_GETSET_GOT:
3514 if (eh != NULL)
3515 {
3516 if (eh->got.refcount > 0)
3517 eh->got.refcount -= 1;
3518 }
3519 else if (local_got_refcounts != NULL)
3520 {
3521 if (local_got_refcounts[r_symndx] > 0)
3522 local_got_refcounts[r_symndx] -= 1;
3523 }
3524 break;
3525
3526 case R_METAG_RELBRANCH_PLT:
3527 if (eh != NULL)
3528 {
3529 if (eh->plt.refcount > 0)
3530 eh->plt.refcount -= 1;
3531 }
3532 break;
3533
3534 case R_METAG_ADDR32:
3535 case R_METAG_HIADDR16:
3536 case R_METAG_LOADDR16:
3537 case R_METAG_GETSETOFF:
3538 case R_METAG_RELBRANCH:
3539 if (eh != NULL)
3540 {
3541 struct elf_metag_link_hash_entry *hh;
3542 struct elf_metag_dyn_reloc_entry **hdh_pp;
3543 struct elf_metag_dyn_reloc_entry *hdh_p;
3544
3545 if (!info->shared && eh->plt.refcount > 0)
3546 eh->plt.refcount -= 1;
3547
3548 hh = (struct elf_metag_link_hash_entry *) eh;
3549
3550 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3551 hdh_pp = &hdh_p->hdh_next)
3552 if (hdh_p->sec == sec)
3553 {
3554 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3555 hdh_p->relative_count -= 1;
3556 hdh_p->count -= 1;
3557 if (hdh_p->count == 0)
3558 *hdh_pp = hdh_p->hdh_next;
3559 break;
3560 }
3561 }
3562 break;
3563
3564 default:
3565 break;
3566 }
3567 }
3568
3569 return TRUE;
3570}
3571
3572/* Determine the type of stub needed, if any, for a call. */
3573
3574static enum elf_metag_stub_type
3575metag_type_of_stub (asection *input_sec,
3576 const Elf_Internal_Rela *rel,
3577 struct elf_metag_link_hash_entry *hh,
3578 bfd_vma destination,
3579 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3580{
3581 bfd_vma location;
3582 bfd_vma branch_offset;
3583 bfd_vma max_branch_offset;
3584
3585 if (hh != NULL &&
3586 !(hh->eh.root.type == bfd_link_hash_defined
3587 || hh->eh.root.type == bfd_link_hash_defweak))
3588 return metag_stub_none;
3589
3590 /* Determine where the call point is. */
3591 location = (input_sec->output_offset
3592 + input_sec->output_section->vma
3593 + rel->r_offset);
3594
3595 branch_offset = destination - location;
3596
3597 /* Determine if a long branch stub is needed. Meta branch offsets
3598 are signed 19 bits 4 byte aligned. */
3599 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3600
3601 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3602 {
3603 if (info->shared)
3604 return metag_stub_long_branch_shared;
3605 else
3606 return metag_stub_long_branch;
3607 }
3608
3609 return metag_stub_none;
3610}
3611
3612#define MOVT_A0_3 0x82180005
3613#define JUMP_A0_3 0xac180003
3614
3615#define MOVT_A1LBP 0x83080005
3616#define ADD_A1LBP 0x83080000
3617
3618#define ADDT_A0_3_CPC 0x82980001
3619#define ADD_A0_3_A0_3 0x82180000
3620#define MOV_PC_A0_3 0xa3180ca0
3621
3622static bfd_boolean
3623metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3624{
3625 struct elf_metag_stub_hash_entry *hsh;
3626 asection *stub_sec;
3627 bfd *stub_bfd;
3628 bfd_byte *loc;
3629 bfd_vma sym_value;
3630 int size;
3631
3632 /* Massage our args to the form they really have. */
3633 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3634
3635 stub_sec = hsh->stub_sec;
3636
3637 /* Make a note of the offset within the stubs for this entry. */
3638 hsh->stub_offset = stub_sec->size;
3639 loc = stub_sec->contents + hsh->stub_offset;
3640
3641 stub_bfd = stub_sec->owner;
3642
3643 switch (hsh->stub_type)
3644 {
3645 case metag_stub_long_branch_shared:
3646 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3647 calculate the jump target using A0.3 as a temporary. Then a MOV
3648 to PC carries out the jump. */
3649 sym_value = (hsh->target_value
3650 + hsh->target_section->output_offset
3651 + hsh->target_section->output_section->vma
3652 + hsh->addend);
3653
3654 sym_value -= (hsh->stub_offset
3655 + stub_sec->output_offset
3656 + stub_sec->output_section->vma);
3657
3658 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3659 loc);
3660
3661 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3662 loc + 4);
3663
3664 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3665
3666 size = 12;
3667 break;
3668 case metag_stub_long_branch:
3669 /* A standard long branch stub is a MOVT instruction followed by a
3670 JUMP instruction using the A0.3 register as a temporary. This is
3671 the same method used by the LDLK linker (patch.c). */
3672 sym_value = (hsh->target_value
3673 + hsh->target_section->output_offset
3674 + hsh->target_section->output_section->vma
3675 + hsh->addend);
3676
3677 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3678 loc);
3679
3680 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3681
3682 size = 8;
3683 break;
3684 default:
3685 BFD_FAIL ();
3686 return FALSE;
3687 }
3688
3689 stub_sec->size += size;
3690 return TRUE;
3691}
3692
3693/* As above, but don't actually build the stub. Just bump offset so
3694 we know stub section sizes. */
3695
3696static bfd_boolean
3697metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3698{
3699 struct elf_metag_stub_hash_entry *hsh;
3700 int size = 0;
3701
3702 /* Massage our args to the form they really have. */
3703 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3704
3705 if (hsh->stub_type == metag_stub_long_branch)
3706 size = 8;
3707 else if (hsh->stub_type == metag_stub_long_branch_shared)
3708 size = 12;
3709
3710 hsh->stub_sec->size += size;
3711 return TRUE;
3712}
3713
3714/* Set up various things so that we can make a list of input sections
3715 for each output section included in the link. Returns -1 on error,
3716 0 when no stubs will be needed, and 1 on success. */
3717
3718int
3719elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3720{
3721 bfd *input_bfd;
3722 unsigned int bfd_count;
3723 int top_id, top_index;
3724 asection *section;
3725 asection **input_list, **list;
3726 bfd_size_type amt;
3727 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3728
3729 /* Count the number of input BFDs and find the top input section id. */
3730 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3731 input_bfd != NULL;
c72f2fb2 3732 input_bfd = input_bfd->link.next)
a3c62988
NC		 3733 {
3734 bfd_count += 1;
3735 for (section = input_bfd->sections;
3736 section != NULL;
3737 section = section->next)
3738 {
3739 if (top_id < section->id)
3740 top_id = section->id;
3741 }
3742 }
3743
3744 htab->bfd_count = bfd_count;
3745
3746 amt = sizeof (struct map_stub) * (top_id + 1);
3747 htab->stub_group = bfd_zmalloc (amt);
3748 if (htab->stub_group == NULL)
3749 return -1;
3750
3751 /* We can't use output_bfd->section_count here to find the top output
3752 section index as some sections may have been removed, and
3753 strip_excluded_output_sections doesn't renumber the indices. */
3754 for (section = output_bfd->sections, top_index = 0;
3755 section != NULL;
3756 section = section->next)
3757 {
3758 if (top_index < section->index)
3759 top_index = section->index;
3760 }
3761
3762 htab->top_index = top_index;
3763 amt = sizeof (asection *) * (top_index + 1);
3764 input_list = bfd_malloc (amt);
3765 htab->input_list = input_list;
3766 if (input_list == NULL)
3767 return -1;
3768
3769 /* For sections we aren't interested in, mark their entries with a
3770 value we can check later. */
3771 list = input_list + top_index;
3772 do
3773 *list = bfd_abs_section_ptr;
3774 while (list-- != input_list);
3775
3776 for (section = output_bfd->sections;
3777 section != NULL;
3778 section = section->next)
3779 {
3780 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3781 * have PC relative relocs in them but no code flag set. */
3782 if (((section->flags & SEC_CODE) != 0) ||
3783 strcmp(".ctors", section->name) ||
3784 strcmp(".dtors", section->name))
3785 input_list[section->index] = NULL;
3786 }
3787
3788 return 1;
3789}
3790
3791/* The linker repeatedly calls this function for each input section,
3792 in the order that input sections are linked into output sections.
3793 Build lists of input sections to determine groupings between which
3794 we may insert linker stubs. */
3795
3796void
3797elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3798{
3799 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3800
3801 if (isec->output_section->index <= htab->top_index)
3802 {
3803 asection **list = htab->input_list + isec->output_section->index;
3804 if (*list != bfd_abs_section_ptr)
3805 {
3806 /* Steal the link_sec pointer for our list. */
3807#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3808 /* This happens to make the list in reverse order,
3809 which is what we want. */
3810 PREV_SEC (isec) = *list;
3811 *list = isec;
3812 }
3813 }
3814}
3815
3816/* See whether we can group stub sections together. Grouping stub
3817 sections may result in fewer stubs. More importantly, we need to
3818 put all .init* and .fini* stubs at the beginning of the .init or
3819 .fini output sections respectively, because glibc splits the
3820 _init and _fini functions into multiple parts. Putting a stub in
3821 the middle of a function is not a good idea. */
3822
3823static void
3824group_sections (struct elf_metag_link_hash_table *htab,
3825 bfd_size_type stub_group_size,
3826 bfd_boolean stubs_always_before_branch)
3827{
3828 asection **list = htab->input_list + htab->top_index;
3829 do
3830 {
3831 asection *tail = *list;
3832 if (tail == bfd_abs_section_ptr)
3833 continue;
3834 while (tail != NULL)
3835 {
3836 asection *curr;
3837 asection *prev;
3838 bfd_size_type total;
3839 bfd_boolean big_sec;
3840
3841 curr = tail;
3842 total = tail->size;
3843 big_sec = total >= stub_group_size;
3844
3845 while ((prev = PREV_SEC (curr)) != NULL
3846 && ((total += curr->output_offset - prev->output_offset)
3847 < stub_group_size))
3848 curr = prev;
3849
3850 /* OK, the size from the start of CURR to the end is less
3851 than stub_group_size bytes and thus can be handled by one stub
3852 section. (or the tail section is itself larger than
3853 stub_group_size bytes, in which case we may be toast.)
3854 We should really be keeping track of the total size of
3855 stubs added here, as stubs contribute to the final output
3856 section size. */
3857 do
3858 {
3859 prev = PREV_SEC (tail);
3860 /* Set up this stub group. */
3861 htab->stub_group[tail->id].link_sec = curr;
3862 }
3863 while (tail != curr && (tail = prev) != NULL);
3864
3865 /* But wait, there's more! Input sections up to stub_group_size
3866 bytes before the stub section can be handled by it too.
3867 Don't do this if we have a really large section after the
3868 stubs, as adding more stubs increases the chance that
3869 branches may not reach into the stub section. */
3870 if (!stubs_always_before_branch && !big_sec)
3871 {
3872 total = 0;
3873 while (prev != NULL
3874 && ((total += tail->output_offset - prev->output_offset)
3875 < stub_group_size))
3876 {
3877 tail = prev;
3878 prev = PREV_SEC (tail);
3879 htab->stub_group[tail->id].link_sec = curr;
3880 }
3881 }
3882 tail = prev;
3883 }
3884 }
3885 while (list-- != htab->input_list);
3886 free (htab->input_list);
3887#undef PREV_SEC
3888}
3889
3890/* Read in all local syms for all input bfds.
3891 Returns -1 on error, 0 otherwise. */
3892
3893static int
3894get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3895 struct bfd_link_info *info)
3896{
3897 unsigned int bfd_indx;
3898 Elf_Internal_Sym *local_syms, **all_local_syms;
3899 int stub_changed = 0;
3900 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3901
3902 /* We want to read in symbol extension records only once. To do this
3903 we need to read in the local symbols in parallel and save them for
3904 later use; so hold pointers to the local symbols in an array. */
3905 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3906 all_local_syms = bfd_zmalloc (amt);
3907 htab->all_local_syms = all_local_syms;
3908 if (all_local_syms == NULL)
3909 return -1;
3910
3911 /* Walk over all the input BFDs, swapping in local symbols. */
3912 for (bfd_indx = 0;
3913 input_bfd != NULL;
c72f2fb2 3914 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3915 {
3916 Elf_Internal_Shdr *symtab_hdr;
3917
3918 /* We'll need the symbol table in a second. */
3919 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3920 if (symtab_hdr->sh_info == 0)
3921 continue;
3922
3923 /* We need an array of the local symbols attached to the input bfd. */
3924 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3925 if (local_syms == NULL)
3926 {
3927 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3928 symtab_hdr->sh_info, 0,
3929 NULL, NULL, NULL);
3930 /* Cache them for elf_link_input_bfd. */
3931 symtab_hdr->contents = (unsigned char *) local_syms;
3932 }
3933 if (local_syms == NULL)
3934 return -1;
3935
3936 all_local_syms[bfd_indx] = local_syms;
3937 }
3938
3939 return stub_changed;
3940}
3941
3942/* Determine and set the size of the stub section for a final link.
3943
3944The basic idea here is to examine all the relocations looking for
3945PC-relative calls to a target that is unreachable with a "CALLR"
3946instruction. */
3947
3948/* See elf32-hppa.c and elf64-ppc.c. */
3949
3950bfd_boolean
3951elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3952 struct bfd_link_info *info,
3953 bfd_signed_vma group_size,
3954 asection * (*add_stub_section) (const char *, asection *),
3955 void (*layout_sections_again) (void))
3956{
3957 bfd_size_type stub_group_size;
3958 bfd_boolean stubs_always_before_branch;
3959 bfd_boolean stub_changed;
3960 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3961
3962 /* Stash our params away. */
3963 htab->stub_bfd = stub_bfd;
3964 htab->add_stub_section = add_stub_section;
3965 htab->layout_sections_again = layout_sections_again;
3966 stubs_always_before_branch = group_size < 0;
3967 if (group_size < 0)
3968 stub_group_size = -group_size;
3969 else
3970 stub_group_size = group_size;
3971 if (stub_group_size == 1)
3972 {
3973 /* Default values. */
3974 /* FIXME: not sure what these values should be */
3975 if (stubs_always_before_branch)
3976 {
3977 stub_group_size = (1 << BRANCH_BITS);
3978 }
3979 else
3980 {
3981 stub_group_size = (1 << BRANCH_BITS);
3982 }
3983 }
3984
3985 group_sections (htab, stub_group_size, stubs_always_before_branch);
3986
3987 switch (get_local_syms (output_bfd, info->input_bfds, info))
3988 {
3989 default:
3990 if (htab->all_local_syms)
3991 goto error_ret_free_local;
3992 return FALSE;
3993
3994 case 0:
3995 stub_changed = FALSE;
3996 break;
3997
3998 case 1:
3999 stub_changed = TRUE;
4000 break;
4001 }
4002
4003 while (1)
4004 {
4005 bfd *input_bfd;
4006 unsigned int bfd_indx;
4007 asection *stub_sec;
4008
4009 for (input_bfd = info->input_bfds, bfd_indx = 0;
4010 input_bfd != NULL;
c72f2fb2 4011 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 4012 {
4013 Elf_Internal_Shdr *symtab_hdr;
4014 asection *section;
4015 Elf_Internal_Sym *local_syms;
4016
4017 /* We'll need the symbol table in a second. */
4018 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4019 if (symtab_hdr->sh_info == 0)
4020 continue;
4021
4022 local_syms = htab->all_local_syms[bfd_indx];
4023
4024 /* Walk over each section attached to the input bfd. */
4025 for (section = input_bfd->sections;
4026 section != NULL;
4027 section = section->next)
4028 {
4029 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4030
4031 /* If there aren't any relocs, then there's nothing more
4032 to do. */
4033 if ((section->flags & SEC_RELOC) == 0
4034 || section->reloc_count == 0)
4035 continue;
4036
4037 /* If this section is a link-once section that will be
4038 discarded, then don't create any stubs. */
4039 if (section->output_section == NULL
4040 || section->output_section->owner != output_bfd)
4041 continue;
4042
4043 /* Get the relocs. */
4044 internal_relocs
4045 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4046 info->keep_memory);
4047 if (internal_relocs == NULL)
4048 goto error_ret_free_local;
4049
4050 /* Now examine each relocation. */
4051 irela = internal_relocs;
4052 irelaend = irela + section->reloc_count;
4053 for (; irela < irelaend; irela++)
4054 {
4055 unsigned int r_type, r_indx;
4056 enum elf_metag_stub_type stub_type;
4057 struct elf_metag_stub_hash_entry *hsh;
4058 asection *sym_sec;
4059 bfd_vma sym_value;
4060 bfd_vma destination;
4061 struct elf_metag_link_hash_entry *hh;
4062 char *stub_name;
4063 const asection *id_sec;
4064
4065 r_type = ELF32_R_TYPE (irela->r_info);
4066 r_indx = ELF32_R_SYM (irela->r_info);
4067
4068 if (r_type >= (unsigned int) R_METAG_MAX)
4069 {
4070 bfd_set_error (bfd_error_bad_value);
4071 error_ret_free_internal:
4072 if (elf_section_data (section)->relocs == NULL)
4073 free (internal_relocs);
4074 goto error_ret_free_local;
4075 }
4076
4077 /* Only look for stubs on CALLR and B instructions. */
4078 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4079 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4080 continue;
4081
4082 /* Now determine the call target, its name, value,
4083 section. */
4084 sym_sec = NULL;
4085 sym_value = 0;
4086 destination = 0;
4087 hh = NULL;
4088 if (r_indx < symtab_hdr->sh_info)
4089 {
4090 /* It's a local symbol. */
4091 Elf_Internal_Sym *sym;
4092 Elf_Internal_Shdr *hdr;
4093 unsigned int shndx;
4094
4095 sym = local_syms + r_indx;
4096 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4097 sym_value = sym->st_value;
4098 shndx = sym->st_shndx;
4099 if (shndx < elf_numsections (input_bfd))
4100 {
4101 hdr = elf_elfsections (input_bfd)[shndx];
4102 sym_sec = hdr->bfd_section;
4103 destination = (sym_value + irela->r_addend
4104 + sym_sec->output_offset
4105 + sym_sec->output_section->vma);
4106 }
4107 }
4108 else
4109 {
4110 /* It's an external symbol. */
4111 int e_indx;
4112
4113 e_indx = r_indx - symtab_hdr->sh_info;
4114 hh = ((struct elf_metag_link_hash_entry *)
4115 elf_sym_hashes (input_bfd)[e_indx]);
4116
4117 while (hh->eh.root.type == bfd_link_hash_indirect
4118 || hh->eh.root.type == bfd_link_hash_warning)
4119 hh = ((struct elf_metag_link_hash_entry *)
4120 hh->eh.root.u.i.link);
4121
4122 if (hh->eh.root.type == bfd_link_hash_defined
4123 || hh->eh.root.type == bfd_link_hash_defweak)
4124 {
4125 sym_sec = hh->eh.root.u.def.section;
4126 sym_value = hh->eh.root.u.def.value;
4127 if (hh->eh.plt.offset != (bfd_vma) -1
4128 && hh->eh.dynindx != -1
4129 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4130 {
4131 sym_sec = htab->splt;
4132 sym_value = hh->eh.plt.offset;
4133 }
4134
4135 if (sym_sec->output_section != NULL)
4136 destination = (sym_value + irela->r_addend
4137 + sym_sec->output_offset
4138 + sym_sec->output_section->vma);
4139 else
4140 continue;
4141 }
4142 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4143 {
4144 if (! info->shared)
4145 continue;
4146 }
4147 else if (hh->eh.root.type == bfd_link_hash_undefined)
4148 {
4149 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4150 && (ELF_ST_VISIBILITY (hh->eh.other)
4151 == STV_DEFAULT)))
4152 continue;
4153 }
4154 else
4155 {
4156 bfd_set_error (bfd_error_bad_value);
4157 goto error_ret_free_internal;
4158 }
4159 }
4160
4161 /* Determine what (if any) linker stub is needed. */
4162 stub_type = metag_type_of_stub (section, irela, hh,
4163 destination, info);
4164 if (stub_type == metag_stub_none)
4165 continue;
4166
4167 /* Support for grouping stub sections. */
4168 id_sec = htab->stub_group[section->id].link_sec;
4169
4170 /* Get the name of this stub. */
4171 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4172 if (!stub_name)
4173 goto error_ret_free_internal;
4174
4175 hsh = metag_stub_hash_lookup (&htab->bstab,
4176 stub_name,
4177 FALSE, FALSE);
4178 if (hsh != NULL)
4179 {
4180 /* The proper stub has already been created. */
4181 free (stub_name);
4182 continue;
4183 }
4184
4185 hsh = metag_add_stub (stub_name, section, htab);
4186 if (hsh == NULL)
4187 {
4188 free (stub_name);
4189 goto error_ret_free_internal;
4190 }
4191 hsh->target_value = sym_value;
4192 hsh->target_section = sym_sec;
4193 hsh->stub_type = stub_type;
4194 hsh->hh = hh;
4195 hsh->addend = irela->r_addend;
4196 stub_changed = TRUE;
4197 }
4198
4199 /* We're done with the internal relocs, free them. */
4200 if (elf_section_data (section)->relocs == NULL)
4201 free (internal_relocs);
4202 }
4203 }
4204
4205 if (!stub_changed)
4206 break;
4207
4208 /* OK, we've added some stubs. Find out the new size of the
4209 stub sections. */
4210 for (stub_sec = htab->stub_bfd->sections;
4211 stub_sec != NULL;
4212 stub_sec = stub_sec->next)
4213 stub_sec->size = 0;
4214
4215 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4216
4217 /* Ask the linker to do its stuff. */
4218 (*htab->layout_sections_again) ();
4219 stub_changed = FALSE;
4220 }
4221
4222 free (htab->all_local_syms);
4223 return TRUE;
4224
4225 error_ret_free_local:
4226 free (htab->all_local_syms);
4227 return FALSE;
4228}
4229
4230/* Build all the stubs associated with the current output file. The
4231 stubs are kept in a hash table attached to the main linker hash
4232 table. This function is called via metagelf_finish in the linker. */
4233
4234bfd_boolean
4235elf_metag_build_stubs (struct bfd_link_info *info)
4236{
4237 asection *stub_sec;
4238 struct bfd_hash_table *table;
4239 struct elf_metag_link_hash_table *htab;
4240
4241 htab = metag_link_hash_table (info);
4242
4243 for (stub_sec = htab->stub_bfd->sections;
4244 stub_sec != NULL;
4245 stub_sec = stub_sec->next)
4246 {
4247 bfd_size_type size;
4248
4249 /* Allocate memory to hold the linker stubs. */
4250 size = stub_sec->size;
4251 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4252 if (stub_sec->contents == NULL && size != 0)
4253 return FALSE;
4254 stub_sec->size = 0;
4255 }
4256
4257 /* Build the stubs as directed by the stub hash table. */
4258 table = &htab->bstab;
4259 bfd_hash_traverse (table, metag_build_one_stub, info);
4260
4261 return TRUE;
4262}
4263
4264/* Return TRUE if SYM represents a local label symbol. */
4265
4266static bfd_boolean
4267elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4268{
4269 if (name[0] == '$' && name[1] == 'L')
4270 return 1;
4271 return _bfd_elf_is_local_label_name (abfd, name);
4272}
4273
4274/* Return address for Ith PLT stub in section PLT, for relocation REL
4275 or (bfd_vma) -1 if it should not be included. */
4276
4277static bfd_vma
4278elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4279 const arelent *rel ATTRIBUTE_UNUSED)
4280{
4281 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4282}
4283
4284#define ELF_ARCH bfd_arch_metag
4285#define ELF_TARGET_ID METAG_ELF_DATA
4286#define ELF_MACHINE_CODE EM_METAG
4287#define ELF_MINPAGESIZE 0x1000
4288#define ELF_MAXPAGESIZE 0x4000
4289#define ELF_COMMONPAGESIZE 0x1000
4290
6d00b590 4291#define TARGET_LITTLE_SYM metag_elf32_vec
a3c62988
NC		 4292#define TARGET_LITTLE_NAME "elf32-metag"
4293
4294#define elf_symbol_leading_char '_'
4295
4296#define elf_info_to_howto_rel NULL
4297#define elf_info_to_howto metag_info_to_howto_rela
4298
4299#define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4300#define bfd_elf32_bfd_link_hash_table_create \
4301 elf_metag_link_hash_table_create
a3c62988
NC		 4302#define elf_backend_relocate_section elf_metag_relocate_section
4303#define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4304#define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4305#define elf_backend_check_relocs elf_metag_check_relocs
4306#define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4307#define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4308#define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4309#define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4310#define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4311#define elf_backend_omit_section_dynsym \
4312 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4313#define elf_backend_post_process_headers elf_metag_post_process_headers
4314#define elf_backend_reloc_type_class elf_metag_reloc_type_class
4315#define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4316#define elf_backend_plt_sym_val elf_metag_plt_sym_val
4317
4318#define elf_backend_can_gc_sections 1
4319#define elf_backend_can_refcount 1
4320#define elf_backend_got_header_size 12
4321#define elf_backend_rela_normal 1
4322#define elf_backend_want_got_sym 0
4323#define elf_backend_want_plt_sym 0
4324#define elf_backend_plt_readonly 1
4325
4326#define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4327#define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4328
4329#include "elf32-target.h"
GDB Binutils - Deliverables
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