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ELF: Copy dyn_relocs in _bfd_elf_link_hash_copy_indirect
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
CommitLineData
a3c62988 1/* Meta support for 32-bit ELF
b3adc24a 2 Copyright (C) 2013-2020 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
07d6d2b8
AM		 76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
a3c62988 79
07d6d2b8
AM		 80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
a3c62988 82
07d6d2b8
AM		 83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
a3c62988
NC		 85
86 bfd_hash_table containing stubs "bstab"
07d6d2b8 87 elf_metag_stub_hash_entry "hsh"
a3c62988 88
a3c62988
NC		 89 Always remember to use GNU Coding Style. */
90
91#define PLT_ENTRY_SIZE sizeof(plt_entry)
92
93static reloc_howto_type elf_metag_howto_table[] =
94{
95 /* High order 16 bit absolute. */
96 HOWTO (R_METAG_HIADDR16, /* type */
97 16, /* rightshift */
98 2, /* size (0 = byte, 1 = short, 2 = long) */
99 16, /* bitsize */
100 FALSE, /* pc_relative */
101 3, /* bitpos */
102 complain_overflow_dont, /* complain_on_overflow */
103 bfd_elf_generic_reloc, /* special_function */
104 "R_METAG_HIADDR16", /* name */
105 FALSE, /* partial_inplace */
106 0, /* src_mask */
107 0x0007fff8, /* dst_mask */
108 FALSE), /* pcrel_offset */
109
110 /* Low order 16 bit absolute. */
111 HOWTO (R_METAG_LOADDR16, /* type */
112 0, /* rightshift */
113 2, /* size (0 = byte, 1 = short, 2 = long) */
114 16, /* bitsize */
115 FALSE, /* pc_relative */
116 3, /* bitpos */
117 complain_overflow_dont,/* complain_on_overflow */
118 bfd_elf_generic_reloc, /* special_function */
119 "R_METAG_LOADDR16", /* name */
120 FALSE, /* partial_inplace */
121 0, /* src_mask */
122 0x0007fff8, /* dst_mask */
123 FALSE), /* pcrel_offset */
124
125 /* 32 bit absolute. */
126 HOWTO (R_METAG_ADDR32, /* type */
127 0, /* rightshift */
128 2, /* size (0 = byte, 1 = short, 2 = long) */
129 32, /* bitsize */
130 FALSE, /* pc_relative */
131 0, /* bitpos */
132 complain_overflow_bitfield, /* complain_on_overflow */
133 bfd_elf_generic_reloc, /* special_function */
134 "R_METAG_ADDR32", /* name */
135 FALSE, /* partial_inplace */
136 0x00000000, /* src_mask */
137 0xffffffff, /* dst_mask */
138 FALSE), /* pcrel_offset */
139
140 /* No relocation. */
141 HOWTO (R_METAG_NONE, /* type */
142 0, /* rightshift */
6346d5ca 143 3, /* size (0 = byte, 1 = short, 2 = long) */
a3c62988
NC		 144 0, /* bitsize */
145 FALSE, /* pc_relative */
146 0, /* bitpos */
147 complain_overflow_dont, /* complain_on_overflow */
148 bfd_elf_generic_reloc, /* special_function */
149 "R_METAG_NONE", /* name */
150 FALSE, /* partial_inplace */
151 0, /* src_mask */
152 0, /* dst_mask */
153 FALSE), /* pcrel_offset */
154
155 /* 19 bit pc relative */
156 HOWTO (R_METAG_RELBRANCH, /* type */
157 2, /* rightshift */
158 2, /* size (0 = byte, 1 = short, 2 = long) */
159 19, /* bitsize */
160 TRUE, /* pc_relative */
161 5, /* bitpos */
162 complain_overflow_signed, /* complain_on_overflow */
163 bfd_elf_generic_reloc, /* special_function */
164 "R_METAG_RELBRANCH", /* name */
165 FALSE, /* partial_inplace */
166 0, /* src_mask */
167 0x00ffffe0, /* dst_mask */
168 FALSE), /* pcrel_offset */
169
170 /* GET/SET offset */
171 HOWTO (R_METAG_GETSETOFF, /* type */
172 0, /* rightshift */
173 1, /* size (0 = byte, 1 = short, 2 = long) */
174 12, /* bitsize */
175 FALSE, /* pc_relative */
176 7, /* bitpos */
177 complain_overflow_dont, /* complain_on_overflow */
178 bfd_elf_generic_reloc, /* special_function */
179 "R_METAG_GETSETOFF", /* name */
180 FALSE, /* partial_inplace */
181 0, /* src_mask */
182 0, /* dst_mask */
183 FALSE), /* pcrel_offset */
184
185 EMPTY_HOWTO (6),
186 EMPTY_HOWTO (7),
187 EMPTY_HOWTO (8),
188 EMPTY_HOWTO (9),
189 EMPTY_HOWTO (10),
190 EMPTY_HOWTO (11),
191 EMPTY_HOWTO (12),
192 EMPTY_HOWTO (13),
193 EMPTY_HOWTO (14),
194 EMPTY_HOWTO (15),
195 EMPTY_HOWTO (16),
196 EMPTY_HOWTO (17),
197 EMPTY_HOWTO (18),
198 EMPTY_HOWTO (19),
199 EMPTY_HOWTO (20),
200 EMPTY_HOWTO (21),
201 EMPTY_HOWTO (22),
202 EMPTY_HOWTO (23),
203 EMPTY_HOWTO (24),
204 EMPTY_HOWTO (25),
205 EMPTY_HOWTO (26),
206 EMPTY_HOWTO (27),
207 EMPTY_HOWTO (28),
208 EMPTY_HOWTO (29),
209
210 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 0, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_dont, /* complain_on_overflow */
217 NULL, /* special_function */
218 "R_METAG_GNU_VTINHERIT", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 HOWTO (R_METAG_GNU_VTENTRY, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 0, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont, /* complain_on_overflow */
231 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
232 "R_METAG_GNU_VTENTRY", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* High order 16 bit GOT offset */
239 HOWTO (R_METAG_HI16_GOTOFF, /* type */
240 16, /* rightshift */
241 2, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 3, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_METAG_HI16_GOTOFF", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0x0007fff8, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* Low order 16 bit GOT offset */
254 HOWTO (R_METAG_LO16_GOTOFF, /* type */
255 0, /* rightshift */
256 2, /* size (0 = byte, 1 = short, 2 = long) */
257 16, /* bitsize */
258 FALSE, /* pc_relative */
259 3, /* bitpos */
260 complain_overflow_dont, /* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_METAG_LO16_GOTOFF", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0x0007fff8, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* GET/SET GOT offset */
269 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
270 0, /* rightshift */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
272 12, /* bitsize */
273 FALSE, /* pc_relative */
274 7, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_METAG_GETSET_GOTOFF", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* GET/SET GOT relative */
284 HOWTO (R_METAG_GETSET_GOT, /* type */
285 0, /* rightshift */
286 1, /* size (0 = byte, 1 = short, 2 = long) */
287 12, /* bitsize */
288 FALSE, /* pc_relative */
289 7, /* bitpos */
290 complain_overflow_dont, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_METAG_GETSET_GOT", /* name */
293 FALSE, /* partial_inplace */
294 0, /* src_mask */
295 0, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 /* High order 16 bit GOT reference */
299 HOWTO (R_METAG_HI16_GOTPC, /* type */
300 16, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 3, /* bitpos */
305 complain_overflow_dont, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_METAG_HI16_GOTPC", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0x0007fff8, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* Low order 16 bit GOT reference */
314 HOWTO (R_METAG_LO16_GOTPC, /* type */
315 0, /* rightshift */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 3, /* bitpos */
320 complain_overflow_dont, /* complain_on_overflow */
321 bfd_elf_generic_reloc, /* special_function */
322 "R_METAG_LO16_GOTPC", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0x0007fff8, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* High order 16 bit PLT */
329 HOWTO (R_METAG_HI16_PLT, /* type */
330 16, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 3, /* bitpos */
335 complain_overflow_dont, /* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_METAG_HI16_PLT", /* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0x0007fff8, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* Low order 16 bit PLT */
344 HOWTO (R_METAG_LO16_PLT, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 3, /* bitpos */
350 complain_overflow_dont, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_METAG_LO16_PLT", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0xffffffff, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
359 2, /* rightshift */
360 2, /* size (0 = byte, 1 = short, 2 = long) */
361 19, /* bitsize */
362 TRUE, /* pc_relative */
363 5, /* bitpos */
364 complain_overflow_signed, /* complain_on_overflow */
365 bfd_elf_generic_reloc, /* special_function */
366 "R_METAG_RELBRANCH_PLT", /* name */
367 FALSE, /* partial_inplace */
368 0, /* src_mask */
369 0x00ffffe0, /* dst_mask */
370 FALSE), /* pcrel_offset */
371
372 /* Dummy relocs used by the linker internally. */
373 HOWTO (R_METAG_GOTOFF, /* type */
374 0, /* rightshift */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
376 32, /* bitsize */
377 FALSE, /* pc_relative */
378 0, /* bitpos */
379 complain_overflow_bitfield, /* complain_on_overflow */
380 bfd_elf_generic_reloc, /* special_function */
381 "R_METAG_GOTOFF", /* name */
382 FALSE, /* partial_inplace */
383 0xffffffff, /* src_mask */
384 0xffffffff, /* dst_mask */
385 FALSE), /* pcrel_offset */
386
387 HOWTO (R_METAG_PLT, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 32, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_bitfield, /* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_METAG_GOTOFF", /* name */
396 FALSE, /* partial_inplace */
397 0xffffffff, /* src_mask */
398 0xffffffff, /* dst_mask */
399 FALSE), /* pcrel_offset */
400
401 /* This is used only by the dynamic linker. The symbol should exist
402 both in the object being run and in some shared library. The
403 dynamic linker copies the data addressed by the symbol from the
404 shared library into the object, because the object being
405 run has to have the data at some particular address. */
406 HOWTO (R_METAG_COPY, /* type */
407 0, /* rightshift */
408 2, /* size (0 = byte, 1 = short, 2 = long) */
409 32, /* bitsize */
410 FALSE, /* pc_relative */
411 0, /* bitpos */
412 complain_overflow_bitfield, /* complain_on_overflow */
413 bfd_elf_generic_reloc, /* special_function */
414 "R_METAG_COPY", /* name */
415 FALSE, /* partial_inplace */
416 0xffffffff, /* src_mask */
417 0xffffffff, /* dst_mask */
418 FALSE), /* pcrel_offset */
419
420 /* Marks a procedure linkage table entry for a symbol. */
421 HOWTO (R_METAG_JMP_SLOT, /* type */
422 0, /* rightshift */
423 2, /* size (0 = byte, 1 = short, 2 = long) */
424 32, /* bitsize */
425 FALSE, /* pc_relative */
426 0, /* bitpos */
427 complain_overflow_bitfield, /* complain_on_overflow */
428 bfd_elf_generic_reloc, /* special_function */
429 "R_METAG_JMP_SLOT", /* name */
430 FALSE, /* partial_inplace */
431 0xffffffff, /* src_mask */
432 0xffffffff, /* dst_mask */
433 FALSE), /* pcrel_offset */
434
435 /* Used only by the dynamic linker. When the object is run, this
436 longword is set to the load address of the object, plus the
437 addend. */
438 HOWTO (R_METAG_RELATIVE, /* type */
439 0, /* rightshift */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
441 32, /* bitsize */
442 FALSE, /* pc_relative */
443 0, /* bitpos */
444 complain_overflow_bitfield, /* complain_on_overflow */
445 bfd_elf_generic_reloc, /* special_function */
446 "R_METAG_RELATIVE", /* name */
447 FALSE, /* partial_inplace */
448 0xffffffff, /* src_mask */
449 0xffffffff, /* dst_mask */
450 FALSE), /* pcrel_offset */
451
452 HOWTO (R_METAG_GLOB_DAT, /* type */
453 0, /* rightshift */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
455 32, /* bitsize */
456 FALSE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_bitfield, /* complain_on_overflow */
459 bfd_elf_generic_reloc, /* special_function */
460 "R_METAG_GLOB_DAT", /* name */
461 FALSE, /* partial_inplace */
462 0xffffffff, /* src_mask */
463 0xffffffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
465
466 HOWTO (R_METAG_TLS_GD, /* type */
467 0, /* rightshift */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
469 16, /* bitsize */
470 FALSE, /* pc_relative */
471 3, /* bitpos */
472 complain_overflow_dont, /* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 "R_METAG_TLS_GD", /* name */
475 FALSE, /* partial_inplace */
476 0, /* src_mask */
477 0x0007fff8, /* dst_mask */
478 FALSE), /* pcrel_offset */
479
480 HOWTO (R_METAG_TLS_LDM, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 FALSE, /* pc_relative */
485 3, /* bitpos */
486 complain_overflow_bitfield, /* complain_on_overflow */
487 bfd_elf_generic_reloc, /* special_function */
488 "R_METAG_TLS_LDM", /* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0007fff8, /* dst_mask */
492 FALSE), /* pcrel_offset */
493
494 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
495 16, /* rightshift */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
497 16, /* bitsize */
498 FALSE, /* pc_relative */
499 3, /* bitpos */
500 complain_overflow_bitfield, /* complain_on_overflow */
501 bfd_elf_generic_reloc, /* special_function */
502 "R_METAG_TLS_LDO_HI16", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0x0007fff8, /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
509 0, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 16, /* bitsize */
512 FALSE, /* pc_relative */
513 3, /* bitpos */
514 complain_overflow_bitfield, /* complain_on_overflow */
515 bfd_elf_generic_reloc, /* special_function */
516 "R_METAG_TLS_LDO_LO16", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0x0007fff8, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Dummy reloc used by the linker internally. */
523 HOWTO (R_METAG_TLS_LDO, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 3, /* bitpos */
529 complain_overflow_bitfield, /* complain_on_overflow */
530 bfd_elf_generic_reloc, /* special_function */
531 "R_METAG_TLS_LDO", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0x0007fff8, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 HOWTO (R_METAG_TLS_IE, /* type */
538 2, /* rightshift */
539 2, /* size (0 = byte, 1 = short, 2 = long) */
540 12, /* bitsize */
541 FALSE, /* pc_relative */
542 7, /* bitpos */
543 complain_overflow_dont, /* complain_on_overflow */
544 bfd_elf_generic_reloc, /* special_function */
545 "R_METAG_TLS_IE", /* name */
546 FALSE, /* partial_inplace */
547 0, /* src_mask */
548 0x0007ff80, /* dst_mask */
549 FALSE), /* pcrel_offset */
550
551 /* Dummy reloc used by the linker internally. */
552 HOWTO (R_METAG_TLS_IENONPIC, /* type */
553 0, /* rightshift */
554 2, /* size (0 = byte, 1 = short, 2 = long) */
555 16, /* bitsize */
556 FALSE, /* pc_relative */
557 3, /* bitpos */
558 complain_overflow_dont, /* complain_on_overflow */
559 bfd_elf_generic_reloc, /* special_function */
560 "R_METAG_TLS_IENONPIC", /* name */
561 FALSE, /* partial_inplace */
562 0, /* src_mask */
563 0x0007fff8, /* dst_mask */
564 FALSE), /* pcrel_offset */
565
566 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
567 16, /* rightshift */
568 2, /* size (0 = byte, 1 = short, 2 = long) */
569 16, /* bitsize */
570 FALSE, /* pc_relative */
571 3, /* bitpos */
572 complain_overflow_dont, /* complain_on_overflow */
573 bfd_elf_generic_reloc, /* special_function */
574 "R_METAG_TLS_IENONPIC_HI16", /* name */
575 FALSE, /* partial_inplace */
576 0, /* src_mask */
577 0x0007fff8, /* dst_mask */
578 FALSE), /* pcrel_offset */
579
580 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 FALSE, /* pc_relative */
585 3, /* bitpos */
586 complain_overflow_dont, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_METAG_TLS_IENONPIC_LO16", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0x0007fff8, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 HOWTO (R_METAG_TLS_TPOFF, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_METAG_TLS_TPOFF", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0xffffffff, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 HOWTO (R_METAG_TLS_DTPMOD, /* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 FALSE, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_bitfield, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 "R_METAG_TLS_DTPMOD", /* name */
617 FALSE, /* partial_inplace */
618 0, /* src_mask */
619 0xffffffff, /* dst_mask */
620 FALSE), /* pcrel_offset */
621
622 HOWTO (R_METAG_TLS_DTPOFF, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_METAG_TLS_DTPOFF", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Dummy reloc used by the linker internally. */
637 HOWTO (R_METAG_TLS_LE, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_METAG_TLS_LE", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffffffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 HOWTO (R_METAG_TLS_LE_HI16, /* type */
652 16, /* rightshift */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 3, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_METAG_TLS_LE_HI16", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0x0007fff8, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 HOWTO (R_METAG_TLS_LE_LO16, /* type */
666 0, /* rightshift */
667 2, /* size (0 = byte, 1 = short, 2 = long) */
668 16, /* bitsize */
669 FALSE, /* pc_relative */
670 3, /* bitpos */
671 complain_overflow_dont, /* complain_on_overflow */
672 bfd_elf_generic_reloc, /* special_function */
673 "R_METAG_TLS_LE_LO16", /* name */
674 FALSE, /* partial_inplace */
675 0, /* src_mask */
676 0x0007fff8, /* dst_mask */
677 FALSE), /* pcrel_offset */
678
679};
680
681#define BRANCH_BITS 19
682
683/* The GOT is typically accessed using a [GS]ETD instruction. The size of the
684 immediate offset which can be used in such instructions therefore limits
685 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
686 is pointing to the base of the GOT then the size is limited to the maximum
687 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
688 in a [GS]ETD instruction is signed, so by setting the base address register
689 to an offset of that 0x2000 byte maximum unsigned offset from the base of
690 the GOT we can use negative offsets in addition to positive. This
691 effectively doubles the usable GOT size to 0x4000 bytes. */
692#define GOT_REG_OFFSET 0x2000
693
694struct metag_reloc_map
695{
696 bfd_reloc_code_real_type bfd_reloc_val;
697 unsigned int metag_reloc_val;
698};
699
700static const struct metag_reloc_map metag_reloc_map [] =
701 {
07d6d2b8
AM		 702 { BFD_RELOC_NONE, R_METAG_NONE },
703 { BFD_RELOC_32, R_METAG_ADDR32 },
704 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
705 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
a3c62988
NC		 706 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
707 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
07d6d2b8
AM		 708 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
709 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
710 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
711 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
a3c62988
NC		 712 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
713 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
714 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
715 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
716 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
717 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
07d6d2b8
AM		 718 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
719 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
a3c62988 720 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
07d6d2b8
AM		 721 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
722 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
723 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
724 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
725 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
726 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
727 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
728 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
a3c62988
NC		 729 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
730 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
07d6d2b8
AM		 731 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
732 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
a3c62988
NC		 733 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
734 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
735 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
736 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
737 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
738 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
07d6d2b8 739 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
a3c62988
NC		 740 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
741 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
742 };
743
744enum elf_metag_stub_type
745{
746 metag_stub_long_branch,
747 metag_stub_long_branch_shared,
748 metag_stub_none
749};
750
751struct elf_metag_stub_hash_entry
752{
753 /* Base hash table entry structure. */
754 struct bfd_hash_entry bh_root;
755
756 /* The stub section. */
757 asection *stub_sec;
758
759 /* Offset within stub_sec of the beginning of this stub. */
760 bfd_vma stub_offset;
761
762 /* Given the symbol's value and its section we can determine its final
763 value when building the stubs (so the stub knows where to jump. */
764 bfd_vma target_value;
765 asection *target_section;
766
767 enum elf_metag_stub_type stub_type;
768
769 /* The symbol table entry, if any, that this was derived from. */
770 struct elf_metag_link_hash_entry *hh;
771
772 /* And the reloc addend that this was derived from. */
773 bfd_vma addend;
774
775 /* Where this stub is being called from, or, in the case of combined
776 stub sections, the first input section in the group. */
777 asection *id_sec;
778};
779
780struct elf_metag_link_hash_entry
781{
782 struct elf_link_hash_entry eh;
783
784 /* A pointer to the most recently used stub hash entry against this
785 symbol. */
786 struct elf_metag_stub_hash_entry *hsh_cache;
787
a3c62988
NC		 788 enum
789 {
790 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
791 } tls_type;
792};
793
794struct elf_metag_link_hash_table
795{
796 /* The main hash table. */
797 struct elf_link_hash_table etab;
798
799 /* The stub hash table. */
800 struct bfd_hash_table bstab;
801
802 /* Linker stub bfd. */
803 bfd *stub_bfd;
804
805 /* Linker call-backs. */
806 asection * (*add_stub_section) (const char *, asection *);
807 void (*layout_sections_again) (void);
808
809 /* Array to keep track of which stub sections have been created, and
810 information on stub grouping. */
811 struct map_stub
812 {
813 /* This is the section to which stubs in the group will be
814 attached. */
815 asection *link_sec;
816 /* The stub section. */
817 asection *stub_sec;
818 } *stub_group;
819
820 /* Assorted information used by elf_metag_size_stubs. */
821 unsigned int bfd_count;
7292b3ac 822 unsigned int top_index;
a3c62988
NC		 823 asection **input_list;
824 Elf_Internal_Sym **all_local_syms;
825
a3c62988
NC		 826 /* Small local sym cache. */
827 struct sym_cache sym_cache;
828
829 /* Data for LDM relocations. */
830 union
831 {
832 bfd_signed_vma refcount;
833 bfd_vma offset;
834 } tls_ldm_got;
835};
836
837/* Return the base vma address which should be subtracted from the
838 real address when resolving a dtpoff relocation. This is PT_TLS
839 segment p_vaddr. */
840static bfd_vma
841dtpoff_base (struct bfd_link_info *info)
842{
843 /* If tls_sec is NULL, we should have signalled an error already. */
844 if (elf_hash_table (info)->tls_sec == NULL)
845 return 0;
846 return elf_hash_table (info)->tls_sec->vma;
847}
848
849/* Return the relocation value for R_METAG_TLS_IE */
850static bfd_vma
851tpoff (struct bfd_link_info *info, bfd_vma address)
852{
853 /* If tls_sec is NULL, we should have signalled an error already. */
854 if (elf_hash_table (info)->tls_sec == NULL)
855 return 0;
856 /* METAG TLS ABI is variant I and static TLS blocks start just after
857 tcbhead structure which has 2 pointer fields. */
858 return (address - elf_hash_table (info)->tls_sec->vma
859 + align_power ((bfd_vma) 8,
860 elf_hash_table (info)->tls_sec->alignment_power));
861}
862
f3185997 863static bfd_boolean
0aa13fee 864metag_info_to_howto_rela (bfd *abfd,
a3c62988
NC		 865 arelent *cache_ptr,
866 Elf_Internal_Rela *dst)
867{
868 unsigned int r_type;
869
870 r_type = ELF32_R_TYPE (dst->r_info);
5860e3f8
NC		 871 if (r_type >= (unsigned int) R_METAG_MAX)
872 {
695344c0 873 /* xgettext:c-format */
0aa13fee
AM		 874 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
875 abfd, r_type);
f3185997
NC		 876 bfd_set_error (bfd_error_bad_value);
877 return FALSE;
5860e3f8 878 }
a3c62988 879 cache_ptr->howto = & elf_metag_howto_table [r_type];
f3185997 880 return TRUE;
a3c62988
NC		 881}
882
883static reloc_howto_type *
884metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
885 bfd_reloc_code_real_type code)
886{
887 unsigned int i;
888
889 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
890 if (metag_reloc_map [i].bfd_reloc_val == code)
891 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
892
893 return NULL;
894}
895
896static reloc_howto_type *
897metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
898 const char *r_name)
899{
900 unsigned int i;
901
902 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
903 if (elf_metag_howto_table[i].name != NULL
904 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
905 return &elf_metag_howto_table[i];
906
907 return NULL;
908}
909
910/* Various hash macros and functions. */
911#define metag_link_hash_table(p) \
912 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
913 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
914
915#define metag_elf_hash_entry(ent) \
916 ((struct elf_metag_link_hash_entry *)(ent))
917
918#define metag_stub_hash_entry(ent) \
919 ((struct elf_metag_stub_hash_entry *)(ent))
920
921#define metag_stub_hash_lookup(table, string, create, copy) \
922 ((struct elf_metag_stub_hash_entry *) \
923 bfd_hash_lookup ((table), (string), (create), (copy)))
924
925#define metag_elf_local_got_tls_type(abfd) \
926 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
927
928/* Assorted hash table functions. */
929
930/* Initialize an entry in the stub hash table. */
931
932static struct bfd_hash_entry *
933stub_hash_newfunc (struct bfd_hash_entry *entry,
934 struct bfd_hash_table *table,
935 const char *string)
936{
937 /* Allocate the structure if it has not already been allocated by a
938 subclass. */
939 if (entry == NULL)
940 {
941 entry = bfd_hash_allocate (table,
942 sizeof (struct elf_metag_stub_hash_entry));
943 if (entry == NULL)
944 return entry;
945 }
946
947 /* Call the allocation method of the superclass. */
948 entry = bfd_hash_newfunc (entry, table, string);
949 if (entry != NULL)
950 {
951 struct elf_metag_stub_hash_entry *hsh;
952
953 /* Initialize the local fields. */
954 hsh = (struct elf_metag_stub_hash_entry *) entry;
955 hsh->stub_sec = NULL;
956 hsh->stub_offset = 0;
957 hsh->target_value = 0;
958 hsh->target_section = NULL;
959 hsh->stub_type = metag_stub_long_branch;
960 hsh->hh = NULL;
961 hsh->id_sec = NULL;
962 }
963
964 return entry;
965}
966
967/* Initialize an entry in the link hash table. */
968
969static struct bfd_hash_entry *
970metag_link_hash_newfunc (struct bfd_hash_entry *entry,
971 struct bfd_hash_table *table,
972 const char *string)
973{
974 /* Allocate the structure if it has not already been allocated by a
975 subclass. */
976 if (entry == NULL)
977 {
978 entry = bfd_hash_allocate (table,
979 sizeof (struct elf_metag_link_hash_entry));
980 if (entry == NULL)
981 return entry;
982 }
983
984 /* Call the allocation method of the superclass. */
985 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
986 if (entry != NULL)
987 {
988 struct elf_metag_link_hash_entry *hh;
989
990 /* Initialize the local fields. */
991 hh = (struct elf_metag_link_hash_entry *) entry;
992 hh->hsh_cache = NULL;
a3c62988
NC		 993 hh->tls_type = GOT_UNKNOWN;
994 }
995
996 return entry;
997}
998
68faa637
AM		 999/* Free the derived linker hash table. */
1000
1001static void
d495ab0d 1002elf_metag_link_hash_table_free (bfd *obfd)
68faa637
AM		 1003{
1004 struct elf_metag_link_hash_table *htab
d495ab0d 1005 = (struct elf_metag_link_hash_table *) obfd->link.hash;
68faa637
AM		 1006
1007 bfd_hash_table_free (&htab->bstab);
d495ab0d 1008 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1009}
1010
a3c62988
NC		 1011/* Create the derived linker hash table. The Meta ELF port uses the derived
1012 hash table to keep information specific to the Meta ELF linker (without
1013 using static variables). */
1014
1015static struct bfd_link_hash_table *
1016elf_metag_link_hash_table_create (bfd *abfd)
1017{
1018 struct elf_metag_link_hash_table *htab;
986f0783 1019 size_t amt = sizeof (*htab);
a3c62988 1020
7bf52ea2 1021 htab = bfd_zmalloc (amt);
a3c62988
NC		 1022 if (htab == NULL)
1023 return NULL;
1024
1025 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1026 metag_link_hash_newfunc,
1027 sizeof (struct elf_metag_link_hash_entry),
1028 METAG_ELF_DATA))
1029 {
1030 free (htab);
1031 return NULL;
1032 }
1033
1034 /* Init the stub hash table too. */
1035 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1036 sizeof (struct elf_metag_stub_hash_entry)))
d495ab0d
AM		 1037 {
1038 _bfd_elf_link_hash_table_free (abfd);
1039 return NULL;
1040 }
1041 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
a3c62988 1042
a3c62988
NC		 1043 return &htab->etab.root;
1044}
1045
a3c62988
NC		 1046/* Section name for stubs is the associated section name plus this
1047 string. */
1048#define STUB_SUFFIX ".stub"
1049
1050/* Build a name for an entry in the stub hash table. */
1051
1052static char *
1053metag_stub_name (const asection *input_section,
1054 const asection *sym_sec,
1055 const struct elf_metag_link_hash_entry *hh,
1056 const Elf_Internal_Rela *rel)
1057{
1058 char *stub_name;
1059 bfd_size_type len;
1060
1061 if (hh)
1062 {
1063 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1064 stub_name = bfd_malloc (len);
1065 if (stub_name != NULL)
1066 {
1067 sprintf (stub_name, "%08x_%s+%x",
1068 input_section->id & 0xffffffff,
1069 hh->eh.root.root.string,
1070 (int) rel->r_addend & 0xffffffff);
1071 }
1072 }
1073 else
1074 {
1075 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1076 stub_name = bfd_malloc (len);
1077 if (stub_name != NULL)
1078 {
1079 sprintf (stub_name, "%08x_%x:%x+%x",
1080 input_section->id & 0xffffffff,
1081 sym_sec->id & 0xffffffff,
1082 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1083 (int) rel->r_addend & 0xffffffff);
1084 }
1085 }
1086 return stub_name;
1087}
1088
1089/* Look up an entry in the stub hash. Stub entries are cached because
1090 creating the stub name takes a bit of time. */
1091
1092static struct elf_metag_stub_hash_entry *
1093metag_get_stub_entry (const asection *input_section,
1094 const asection *sym_sec,
1095 struct elf_metag_link_hash_entry *hh,
1096 const Elf_Internal_Rela *rel,
1097 struct elf_metag_link_hash_table *htab)
1098{
1099 struct elf_metag_stub_hash_entry *hsh;
1100 const asection *id_sec;
1101
1102 /* If this input section is part of a group of sections sharing one
1103 stub section, then use the id of the first section in the group.
1104 Stub names need to include a section id, as there may well be
1105 more than one stub used to reach say, printf, and we need to
1106 distinguish between them. */
1107 id_sec = htab->stub_group[input_section->id].link_sec;
1108
1109 if (hh != NULL && hh->hsh_cache != NULL
1110 && hh->hsh_cache->hh == hh
1111 && hh->hsh_cache->id_sec == id_sec)
1112 {
1113 hsh = hh->hsh_cache;
1114 }
1115 else
1116 {
1117 char *stub_name;
1118
1119 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1120 if (stub_name == NULL)
1121 return NULL;
1122
1123 hsh = metag_stub_hash_lookup (&htab->bstab,
1124 stub_name, FALSE, FALSE);
1125
1126 if (hh != NULL)
1127 hh->hsh_cache = hsh;
1128
1129 free (stub_name);
1130 }
1131
1132 return hsh;
1133}
1134
1135/* Add a new stub entry to the stub hash. Not all fields of the new
1136 stub entry are initialised. */
1137
1138static struct elf_metag_stub_hash_entry *
1139metag_add_stub (const char *stub_name,
1140 asection *section,
1141 struct elf_metag_link_hash_table *htab)
1142{
1143 asection *link_sec;
1144 asection *stub_sec;
1145 struct elf_metag_stub_hash_entry *hsh;
1146
1147 link_sec = htab->stub_group[section->id].link_sec;
1148 stub_sec = htab->stub_group[section->id].stub_sec;
1149 if (stub_sec == NULL)
1150 {
1151 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1152 if (stub_sec == NULL)
1153 {
1154 size_t namelen;
1155 bfd_size_type len;
1156 char *s_name;
1157
1158 namelen = strlen (link_sec->name);
1159 len = namelen + sizeof (STUB_SUFFIX);
1160 s_name = bfd_alloc (htab->stub_bfd, len);
1161 if (s_name == NULL)
1162 return NULL;
1163
1164 memcpy (s_name, link_sec->name, namelen);
1165 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1166
1167 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1168 if (stub_sec == NULL)
1169 return NULL;
1170 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1171 }
1172 htab->stub_group[section->id].stub_sec = stub_sec;
1173 }
1174
1175 /* Enter this entry into the linker stub hash table. */
1176 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1177 TRUE, FALSE);
1178 if (hsh == NULL)
1179 {
695344c0 1180 /* xgettext:c-format */
871b3ab2 1181 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4eca0228 1182 section->owner, stub_name);
a3c62988
NC		 1183 return NULL;
1184 }
1185
1186 hsh->stub_sec = stub_sec;
1187 hsh->stub_offset = 0;
1188 hsh->id_sec = link_sec;
1189 return hsh;
1190}
1191
1192/* Check a signed integer value can be represented in the given number
1193 of bits. */
1194
1195static bfd_boolean
1196within_signed_range (int value, unsigned int bits)
1197{
1198 int min_val = -(1 << (bits - 1));
1199 int max_val = (1 << (bits - 1)) - 1;
1200 return (value <= max_val) && (value >= min_val);
1201}
1202
1203/* Perform a relocation as part of a final link. */
1204
1205static bfd_reloc_status_type
1206metag_final_link_relocate (reloc_howto_type *howto,
1207 bfd *input_bfd,
1208 asection *input_section,
1209 bfd_byte *contents,
1210 Elf_Internal_Rela *rel,
1211 bfd_vma relocation,
1212 struct elf_metag_link_hash_entry *hh,
1213 struct elf_metag_link_hash_table *htab,
1214 asection *sym_sec)
1215{
1216 bfd_reloc_status_type r = bfd_reloc_ok;
1217 bfd_byte *hit_data = contents + rel->r_offset;
1218 int opcode, op_shift, op_extended, l1, l2;
1219 bfd_signed_vma srel, addend = rel->r_addend;
1220 struct elf_metag_stub_hash_entry *hsh = NULL;
1221 bfd_vma location;
1222
1223 /* Find out where we are and where we're going. */
1224 location = (rel->r_offset +
1225 input_section->output_offset +
1226 input_section->output_section->vma);
1227
1228 switch (howto->type)
1229 {
1230 case R_METAG_RELBRANCH:
1231 case R_METAG_RELBRANCH_PLT:
1232 /* Make it a pc relative offset. */
1233 relocation -= location;
1234 break;
1235 case R_METAG_TLS_GD:
1236 case R_METAG_TLS_IE:
1237 relocation -= elf_gp (input_section->output_section->owner);
1238 break;
1239 default:
1240 break;
1241 }
1242
1243 switch (howto->type)
1244 {
1245 case R_METAG_RELBRANCH_PLT:
1246 case R_METAG_RELBRANCH:
1247 opcode = bfd_get_32 (input_bfd, hit_data);
1248
1249 srel = (bfd_signed_vma) relocation;
1250 srel += addend;
1251
1252 /* If the branch is out of reach, then redirect the
1253 call to the local stub for this function. */
1254 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1255 (srel < - (1 << (BRANCH_BITS + 1))))
1256 {
1257 if (sym_sec == NULL)
1258 break;
1259
1260 hsh = metag_get_stub_entry (input_section, sym_sec,
1261 hh, rel, htab);
1262 if (hsh == NULL)
1263 return bfd_reloc_undefined;
1264
1265 /* Munge up the value and addend so that we call the stub
1266 rather than the procedure directly. */
1267 srel = (hsh->stub_offset
1268 + hsh->stub_sec->output_offset
1269 + hsh->stub_sec->output_section->vma);
1270 srel -= location;
1271 }
1272
1273 srel = srel >> 2;
1274
1275 if (!within_signed_range (srel, BRANCH_BITS))
1276 {
1277 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1278 srel = 0;
1279 else
1280 return bfd_reloc_overflow;
1281 }
1282
1283 opcode &= ~(0x7ffff << 5);
1284 opcode |= ((srel & 0x7ffff) << 5);
1285
1286 bfd_put_32 (input_bfd, opcode, hit_data);
1287 break;
1288 case R_METAG_GETSETOFF:
1289 case R_METAG_GETSET_GOT:
1290 case R_METAG_GETSET_GOTOFF:
1291 opcode = bfd_get_32 (input_bfd, hit_data);
1292
1293 srel = (bfd_signed_vma) relocation;
1294 srel += addend;
1295
1296 /* Is this a standard or extended GET/SET? */
1297 if ((opcode & 0xf0000000) == 0xa0000000)
1298 {
1299 /* Extended GET/SET. */
1300 l1 = opcode & 0x2;
1301 l2 = opcode & 0x4;
1302 op_extended = 1;
1303 }
1304 else
1305 {
1306 /* Standard GET/SET. */
1307 l1 = opcode & 0x01000000;
1308 l2 = opcode & 0x04000000;
1309 op_extended = 0;
1310 }
1311
1312 /* Calculate the width of the GET/SET and how much we need to
1313 shift the result by. */
1314 if (l2)
1315 if (l1)
1316 op_shift = 3;
1317 else
1318 op_shift = 2;
1319 else
1320 if (l1)
1321 op_shift = 1;
1322 else
1323 op_shift = 0;
1324
1325 /* GET/SET offsets are scaled by the width of the transfer. */
1326 srel = srel >> op_shift;
1327
1328 /* Extended GET/SET has signed 12 bits of offset, standard has
1329 signed 6 bits. */
1330 if (op_extended)
1331 {
1332 if (!within_signed_range (srel, 12))
1333 {
1334 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1335 srel = 0;
1336 else
1337 return bfd_reloc_overflow;
1338 }
1339 opcode &= ~(0xfff << 7);
1340 opcode |= ((srel & 0xfff) << 7);
1341 }
1342 else
1343 {
1344 if (!within_signed_range (srel, 5))
1345 {
1346 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1347 srel = 0;
1348 else
1349 return bfd_reloc_overflow;
1350 }
1351 opcode &= ~(0x3f << 8);
1352 opcode |= ((srel & 0x3f) << 8);
1353 }
1354
1355 bfd_put_32 (input_bfd, opcode, hit_data);
1356 break;
1357 case R_METAG_TLS_GD:
1358 case R_METAG_TLS_LDM:
1359 opcode = bfd_get_32 (input_bfd, hit_data);
1360
1361 if ((bfd_signed_vma)relocation < 0)
1362 {
1363 /* sign extend immediate */
1364 if ((opcode & 0xf2000001) == 0x02000000)
1365 {
1366 /* ADD De.e,Dx.r,#I16 */
1367 /* set SE bit */
1368 opcode |= (1 << 1);
1369 } else
1370 return bfd_reloc_overflow;
1371 }
1372
1373 bfd_put_32 (input_bfd, opcode, hit_data);
1374
1375 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1376 contents, rel->r_offset,
1377 relocation, rel->r_addend);
1378 break;
1379 default:
1380 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1381 contents, rel->r_offset,
1382 relocation, rel->r_addend);
1383 }
1384
1385 return r;
1386}
1387
1388/* This is defined because R_METAG_NONE != 0...
1389 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1390#define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1391 rel, relend, howto, contents) \
1392 { \
1393 _bfd_clear_contents (howto, input_bfd, input_section, \
0930cb30 1394 contents, rel->r_offset); \
a3c62988 1395 \
0e1862bb 1396 if (bfd_link_relocatable (info) \
a3c62988
NC		 1397 && (input_section->flags & SEC_DEBUGGING)) \
1398 { \
1399 /* Only remove relocations in debug sections since other \
1400 sections may require relocations. */ \
1401 Elf_Internal_Shdr *rel_hdr; \
1402 \
1403 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1404 \
1405 /* Avoid empty output section. */ \
1406 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1407 { \
1408 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1409 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1410 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1411 \
1412 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1413 \
1414 input_section->reloc_count--; \
1415 relend--; \
1416 rel--; \
1417 continue; \
1418 } \
1419 } \
1420 \
1421 rel->r_info = R_METAG_NONE; \
1422 rel->r_addend = 0; \
1423 continue; \
1424 }
1425
1426/* Relocate a META ELF section.
1427
1428The RELOCATE_SECTION function is called by the new ELF backend linker
1429to handle the relocations for a section.
1430
1431The relocs are always passed as Rela structures; if the section
1432actually uses Rel structures, the r_addend field will always be
1433zero.
1434
1435This function is responsible for adjusting the section contents as
1436necessary, and (if using Rela relocs and generating a relocatable
1437output file) adjusting the reloc addend as necessary.
1438
1439This function does not have to worry about setting the reloc
1440address or the reloc symbol index.
1441
1442LOCAL_SYMS is a pointer to the swapped in local symbols.
1443
1444LOCAL_SECTIONS is an array giving the section in the input file
1445corresponding to the st_shndx field of each local symbol.
1446
1447The global hash table entry for the global symbols can be found
1448via elf_sym_hashes (input_bfd).
1449
1450When generating relocatable output, this function must handle
1451STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1452going to be the section symbol corresponding to the output
1453section, which means that the addend must be adjusted
1454accordingly. */
1455
1456static bfd_boolean
1457elf_metag_relocate_section (bfd *output_bfd,
1458 struct bfd_link_info *info,
1459 bfd *input_bfd,
1460 asection *input_section,
1461 bfd_byte *contents,
1462 Elf_Internal_Rela *relocs,
1463 Elf_Internal_Sym *local_syms,
1464 asection **local_sections)
1465{
1466 bfd_vma *local_got_offsets;
1467 Elf_Internal_Shdr *symtab_hdr;
1468 struct elf_link_hash_entry **eh_syms;
1469 struct elf_metag_link_hash_table *htab;
1470 Elf_Internal_Rela *rel;
1471 Elf_Internal_Rela *relend;
1472 asection *sreloc;
1473
1474 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1475 eh_syms = elf_sym_hashes (input_bfd);
1476 relend = relocs + input_section->reloc_count;
1477
1478 htab = metag_link_hash_table (info);
1479 local_got_offsets = elf_local_got_offsets (input_bfd);
1480
1481 sreloc = NULL;
1482
1483 for (rel = relocs; rel < relend; rel ++)
1484 {
1485 reloc_howto_type *howto;
1486 unsigned long r_symndx;
1487 Elf_Internal_Sym *sym;
1488 asection *sec;
1489 struct elf_metag_link_hash_entry *hh;
1490 bfd_vma relocation;
1491 bfd_reloc_status_type r;
1492 const char *name;
1493 int r_type;
1494
1495 r_type = ELF32_R_TYPE (rel->r_info);
1496
1497 if (r_type == R_METAG_GNU_VTINHERIT
1498 || r_type == R_METAG_GNU_VTENTRY
1499 || r_type == R_METAG_NONE)
1500 continue;
1501
1502 r_symndx = ELF32_R_SYM (rel->r_info);
1503
1504 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1505 hh = NULL;
1506 sym = NULL;
1507 sec = NULL;
1508
1509 if (r_symndx < symtab_hdr->sh_info)
1510 {
1511 sym = local_syms + r_symndx;
1512 sec = local_sections [r_symndx];
1513 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1514
1515 name = bfd_elf_string_from_elf_section
1516 (input_bfd, symtab_hdr->sh_link, sym->st_name);
fd361982 1517 name = name == NULL ? bfd_section_name (sec) : name;
a3c62988
NC		 1518 }
1519 else
1520 {
1521 struct elf_link_hash_entry *eh;
62d887d4 1522 bfd_boolean unresolved_reloc, warned, ignored;
a3c62988
NC		 1523
1524 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1525 r_symndx, symtab_hdr, eh_syms,
1526 eh, sec, relocation,
62d887d4 1527 unresolved_reloc, warned, ignored);
a3c62988
NC		 1528
1529 name = eh->root.root.string;
1530 hh = (struct elf_metag_link_hash_entry *) eh;
1531 }
1532
1533 if (sec != NULL && discarded_section (sec))
1534 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1535 rel, relend, howto, contents);
1536
0e1862bb 1537 if (bfd_link_relocatable (info))
a3c62988
NC		 1538 continue;
1539
1540 switch (r_type)
1541 {
1542 case R_METAG_ADDR32:
1543 case R_METAG_RELBRANCH:
1544 if ((input_section->flags & SEC_ALLOC) == 0)
1545 break;
1546
0e1862bb 1547 if ((bfd_link_pic (info)
a3c62988
NC		 1548 && r_symndx != STN_UNDEF
1549 && (input_section->flags & SEC_ALLOC) != 0
1550 && (r_type != R_METAG_RELBRANCH
1551 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
0e1862bb 1552 || (!bfd_link_pic (info)
a3c62988
NC		 1553 && hh != NULL
1554 && hh->eh.dynindx != -1
1555 && !hh->eh.non_got_ref
1556 && ((hh->eh.def_dynamic
1557 && !hh->eh.def_regular)
1558 || hh->eh.root.type == bfd_link_hash_undefweak
1559 || hh->eh.root.type == bfd_link_hash_undefined)))
1560 {
1561 Elf_Internal_Rela outrel;
1562 bfd_boolean skip, relocate;
1563 bfd_byte *loc;
1564
1565 /* When generating a shared object, these relocations
1566 are copied into the output file to be resolved at run
1567 time. */
1568
1569 sreloc = elf_section_data (input_section)->sreloc;
1570 BFD_ASSERT (sreloc != NULL);
1571
1572 skip = FALSE;
1573 relocate = FALSE;
1574
1575 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1576 info,
1577 input_section,
1578 rel->r_offset);
1579 if (outrel.r_offset == (bfd_vma) -1)
1580 skip = TRUE;
1581 else if (outrel.r_offset == (bfd_vma) -2)
1582 skip = TRUE, relocate = TRUE;
1583 outrel.r_offset += (input_section->output_section->vma
1584 + input_section->output_offset);
1585
1586 if (skip)
1587 {
1588 memset (&outrel, 0, sizeof outrel);
1589 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1590 }
1591 else if (r_type == R_METAG_RELBRANCH)
1592 {
1593 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1594 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1595 outrel.r_addend = rel->r_addend;
1596 }
1597 else
1598 {
1599 /* h->dynindx may be -1 if this symbol was marked to
1600 become local. */
1601 if (hh == NULL
1602 || ((info->symbolic || hh->eh.dynindx == -1)
1603 && hh->eh.def_regular))
1604 {
1605 relocate = TRUE;
1606 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1607 outrel.r_addend = relocation + rel->r_addend;
1608 }
1609 else
1610 {
1611 BFD_ASSERT (hh->eh.dynindx != -1);
1612 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1613 outrel.r_addend = rel->r_addend;
1614 }
1615 }
1616
1617 loc = sreloc->contents;
1618 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1619 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1620 ++sreloc->reloc_count;
1621
1622 /* If this reloc is against an external symbol, we do
1623 not want to fiddle with the addend. Otherwise, we
1624 need to include the symbol value so that it becomes
1625 an addend for the dynamic reloc. */
1626 if (! relocate)
1627 continue;
1628 }
1629 break;
1630
1631 case R_METAG_RELBRANCH_PLT:
1632 /* Relocation is to the entry for this symbol in the
1633 procedure linkage table. */
1634
1635 if (hh == NULL)
1636 break;
1637
1638 if (hh->eh.forced_local)
1639 break;
1640
ce558b89 1641 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
a3c62988
NC		 1642 {
1643 /* We didn't make a PLT entry for this symbol. This
1644 happens when statically linking PIC code, or when
1645 using -Bsymbolic. */
1646 break;
1647 }
1648
ce558b89
AM		 1649 relocation = (htab->etab.splt->output_section->vma
1650 + htab->etab.splt->output_offset
a3c62988
NC		 1651 + hh->eh.plt.offset);
1652 break;
1653 case R_METAG_HI16_GOTPC:
1654 case R_METAG_LO16_GOTPC:
ce558b89 1655 BFD_ASSERT (htab->etab.sgot != NULL);
a3c62988 1656
ce558b89
AM		 1657 relocation = (htab->etab.sgot->output_section->vma +
1658 htab->etab.sgot->output_offset);
a3c62988
NC		 1659 relocation += GOT_REG_OFFSET;
1660 relocation -= (input_section->output_section->vma
1661 + input_section->output_offset
1662 + rel->r_offset);
1663 break;
1664 case R_METAG_HI16_GOTOFF:
1665 case R_METAG_LO16_GOTOFF:
1666 case R_METAG_GETSET_GOTOFF:
ce558b89 1667 BFD_ASSERT (htab->etab.sgot != NULL);
a3c62988 1668
ce558b89
AM		 1669 relocation -= (htab->etab.sgot->output_section->vma +
1670 htab->etab.sgot->output_offset);
a3c62988
NC		 1671 relocation -= GOT_REG_OFFSET;
1672 break;
1673 case R_METAG_GETSET_GOT:
1674 {
1675 bfd_vma off;
1676 bfd_boolean do_got = 0;
1677
1678 /* Relocation is to the entry for this symbol in the
1679 global offset table. */
1680 if (hh != NULL)
1681 {
1682 bfd_boolean dyn;
1683
1684 off = hh->eh.got.offset;
1685 dyn = htab->etab.dynamic_sections_created;
0e1862bb
L		 1686 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1687 bfd_link_pic (info),
a3c62988
NC		 1688 &hh->eh))
1689 {
1690 /* If we aren't going to call finish_dynamic_symbol,
1691 then we need to handle initialisation of the .got
1692 entry and create needed relocs here. Since the
1693 offset must always be a multiple of 4, we use the
1694 least significant bit to record whether we have
1695 initialised it already. */
1696 if ((off & 1) != 0)
1697 off &= ~1;
1698 else
1699 {
1700 hh->eh.got.offset |= 1;
1701 do_got = 1;
1702 }
1703 }
1704 }
1705 else
1706 {
1707 /* Local symbol case. */
1708 if (local_got_offsets == NULL)
1709 abort ();
1710
1711 off = local_got_offsets[r_symndx];
1712
1713 /* The offset must always be a multiple of 4. We use
1714 the least significant bit to record whether we have
1715 already generated the necessary reloc. */
1716 if ((off & 1) != 0)
1717 off &= ~1;
1718 else
1719 {
1720 local_got_offsets[r_symndx] |= 1;
1721 do_got = 1;
1722 }
1723 }
1724
1725 if (do_got)
1726 {
0e1862bb 1727 if (bfd_link_pic (info))
a3c62988
NC		 1728 {
1729 /* Output a dynamic relocation for this GOT entry.
1730 In this case it is relative to the base of the
1731 object because the symbol index is zero. */
1732 Elf_Internal_Rela outrel;
1733 bfd_byte *loc;
ce558b89 1734 asection *s = htab->etab.srelgot;
a3c62988
NC		 1735
1736 outrel.r_offset = (off
ce558b89
AM		 1737 + htab->etab.sgot->output_offset
1738 + htab->etab.sgot->output_section->vma);
a3c62988
NC		 1739 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1740 outrel.r_addend = relocation;
1741 loc = s->contents;
1742 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1743 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1744 }
1745 else
1746 bfd_put_32 (output_bfd, relocation,
ce558b89 1747 htab->etab.sgot->contents + off);
a3c62988
NC		 1748 }
1749
1750 if (off >= (bfd_vma) -2)
1751 abort ();
1752
1753 relocation = off - GOT_REG_OFFSET;
1754 }
1755 break;
1756 case R_METAG_TLS_GD:
1757 case R_METAG_TLS_IE:
1758 {
1759 /* XXXMJF There is room here for optimisations. For example
1760 converting from GD->IE, etc. */
1761 bfd_vma off;
1762 int indx;
1763 char tls_type;
1764
ce558b89 1765 if (htab->etab.sgot == NULL)
a3c62988
NC		 1766 abort();
1767
1768 indx = 0;
1769 if (hh != NULL)
1770 {
1771 bfd_boolean dyn;
1772 dyn = htab->etab.dynamic_sections_created;
1773
0e1862bb
L		 1774 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1775 bfd_link_pic (info),
1776 &hh->eh)
1777 && (!bfd_link_pic (info)
a3c62988
NC		 1778 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1779 {
1780 indx = hh->eh.dynindx;
1781 }
1782 off = hh->eh.got.offset;
1783 tls_type = hh->tls_type;
1784 }
1785 else
1786 {
1787 /* Local symbol case. */
1788 if (local_got_offsets == NULL)
1789 abort ();
1790
1791 off = local_got_offsets[r_symndx];
1792 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1793 }
1794
1795 if (tls_type == GOT_UNKNOWN)
6ec49e7c 1796 abort ();
a3c62988
NC		 1797
1798 if ((off & 1) != 0)
1799 off &= ~1;
1800 else
1801 {
1802 bfd_boolean need_relocs = FALSE;
1803 Elf_Internal_Rela outrel;
1804 bfd_byte *loc = NULL;
1805 int cur_off = off;
1806
1807 /* The GOT entries have not been initialized yet. Do it
1808 now, and emit any relocations. If both an IE GOT and a
1809 GD GOT are necessary, we emit the GD first. */
1810
0e1862bb 1811 if ((bfd_link_pic (info) || indx != 0)
a3c62988
NC		 1812 && (hh == NULL
1813 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1814 || hh->eh.root.type != bfd_link_hash_undefweak))
1815 {
1816 need_relocs = TRUE;
ce558b89 1817 loc = htab->etab.srelgot->contents;
a3c62988 1818 /* FIXME (CAO): Should this be reloc_count++ ? */
ce558b89 1819 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
a3c62988
NC		 1820 }
1821
1822 if (tls_type & GOT_TLS_GD)
1823 {
1824 if (need_relocs)
1825 {
1826 outrel.r_offset = (cur_off
ce558b89
AM		 1827 + htab->etab.sgot->output_section->vma
1828 + htab->etab.sgot->output_offset);
a3c62988
NC		 1829 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1830 outrel.r_addend = 0;
ce558b89 1831 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
a3c62988
NC		 1832
1833 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ce558b89 1834 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1835 loc += sizeof (Elf32_External_Rela);
1836
1837 if (indx == 0)
1838 bfd_put_32 (output_bfd, 0,
ce558b89 1839 htab->etab.sgot->contents + cur_off + 4);
a3c62988
NC		 1840 else
1841 {
1842 bfd_put_32 (output_bfd, 0,
ce558b89 1843 htab->etab.sgot->contents + cur_off + 4);
a3c62988
NC		 1844 outrel.r_info = ELF32_R_INFO (indx,
1845 R_METAG_TLS_DTPOFF);
1846 outrel.r_offset += 4;
1847 bfd_elf32_swap_reloca_out (output_bfd,
1848 &outrel, loc);
ce558b89 1849 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1850 loc += sizeof (Elf32_External_Rela);
1851 }
1852 }
1853 else
1854 {
1855 /* We don't support changing the TLS model. */
6ec49e7c
NC		 1856 /* PR 20675 */
1857 if (bfd_link_pic (info))
871b3ab2 1858 _bfd_error_handler (_("%pB(%pA): multiple TLS models are not supported"),
d42c267e 1859 input_bfd, input_section);
6ec49e7c 1860 else
871b3ab2 1861 _bfd_error_handler (_("%pB(%pA): shared library symbol %s encountered whilst performing a static link"),
6ec49e7c
NC		 1862 input_bfd, input_section, name);
1863 return FALSE;
a3c62988
NC		 1864 }
1865
1866 cur_off += 8;
1867 }
1868
1869 if (tls_type & GOT_TLS_IE)
1870 {
1871 if (need_relocs)
1872 {
1873 outrel.r_offset = (cur_off
ce558b89
AM		 1874 + htab->etab.sgot->output_section->vma
1875 + htab->etab.sgot->output_offset);
a3c62988
NC		 1876 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1877
1878 if (indx == 0)
1879 outrel.r_addend = relocation - dtpoff_base (info);
1880 else
1881 outrel.r_addend = 0;
1882
1883 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ce558b89 1884 htab->etab.srelgot->reloc_count++;
a3c62988
NC		 1885 loc += sizeof (Elf32_External_Rela);
1886 }
1887 else
1888 bfd_put_32 (output_bfd, tpoff (info, relocation),
ce558b89 1889 htab->etab.sgot->contents + cur_off);
a3c62988
NC		 1890
1891 cur_off += 4;
1892 }
1893
1894 if (hh != NULL)
1895 hh->eh.got.offset |= 1;
1896 else
1897 local_got_offsets[r_symndx] |= 1;
1898 }
1899
1900 /* Add the base of the GOT to the relocation value. */
1901 relocation = off - GOT_REG_OFFSET;
1902
1903 break;
1904 }
1905
1906 case R_METAG_TLS_IENONPIC_HI16:
1907 case R_METAG_TLS_IENONPIC_LO16:
1908 case R_METAG_TLS_LE_HI16:
1909 case R_METAG_TLS_LE_LO16:
0e1862bb 1910 if (bfd_link_pic (info))
a3c62988 1911 {
4eca0228 1912 _bfd_error_handler
695344c0 1913 /* xgettext:c-format */
2dcf00ce
AM		 1914 (_("%pB(%pA+%#" PRIx64 "): "
1915 "%s relocation not permitted in shared object"),
1916 input_bfd, input_section, (uint64_t) rel->r_offset,
1917 howto->name);
a3c62988
NC		 1918 return FALSE;
1919 }
1920 else
1921 relocation = tpoff (info, relocation);
1922 break;
1923 case R_METAG_TLS_LDO_HI16:
1924 case R_METAG_TLS_LDO_LO16:
0e1862bb 1925 if (! bfd_link_pic (info))
a3c62988
NC		 1926 relocation = tpoff (info, relocation);
1927 else
1928 relocation -= dtpoff_base (info);
1929 break;
1930 case R_METAG_TLS_LDM:
1931 {
1932 bfd_vma off;
1933
ce558b89 1934 if (htab->etab.sgot == NULL)
a3c62988
NC		 1935 abort();
1936 off = htab->tls_ldm_got.offset;
1937 if (off & 1)
1938 off &= ~1;
1939 else
1940 {
1941 Elf_Internal_Rela outrel;
1942 bfd_byte *loc;
1943
1944 outrel.r_offset = (off
ce558b89
AM		 1945 + htab->etab.sgot->output_section->vma
1946 + htab->etab.sgot->output_offset);
a3c62988
NC		 1947
1948 outrel.r_addend = 0;
1949 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
ce558b89
AM		 1950 loc = htab->etab.srelgot->contents;
1951 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
a3c62988
NC		 1952 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1953 htab->tls_ldm_got.offset |= 1;
1954 }
1955
1956 relocation = off - GOT_REG_OFFSET;
1957 break;
1958 }
1959 default:
1960 break;
1961 }
1962
1963 r = metag_final_link_relocate (howto, input_bfd, input_section,
1964 contents, rel, relocation, hh, htab,
1965 sec);
1966
1967 if (r != bfd_reloc_ok)
1968 {
1969 const char * msg = (const char *) NULL;
1970
1971 switch (r)
1972 {
1973 case bfd_reloc_overflow:
1a72702b 1974 (*info->callbacks->reloc_overflow)
a3c62988
NC		 1975 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1976 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1977 break;
1978
1979 case bfd_reloc_undefined:
1a72702b
AM		 1980 (*info->callbacks->undefined_symbol)
1981 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
a3c62988
NC		 1982 break;
1983
1984 case bfd_reloc_outofrange:
1985 msg = _("internal error: out of range error");
1986 break;
1987
1988 case bfd_reloc_notsupported:
1989 msg = _("internal error: unsupported relocation error");
1990 break;
1991
1992 case bfd_reloc_dangerous:
1993 msg = _("internal error: dangerous relocation");
1994 break;
1995
1996 default:
1997 msg = _("internal error: unknown error");
1998 break;
1999 }
2000
2001 if (msg)
1a72702b
AM		 2002 (*info->callbacks->warning) (info, msg, name, input_bfd,
2003 input_section, rel->r_offset);
a3c62988
NC		 2004 }
2005 }
2006
2007 return TRUE;
2008}
2009
2010/* Create the .plt and .got sections, and set up our hash table
2011 short-cuts to various dynamic sections. */
2012
2013static bfd_boolean
2014elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2015{
2016 struct elf_metag_link_hash_table *htab;
2017 struct elf_link_hash_entry *eh;
2018 struct bfd_link_hash_entry *bh;
2019 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2020
2021 /* Don't try to create the .plt and .got twice. */
2022 htab = metag_link_hash_table (info);
ce558b89 2023 if (htab->etab.splt != NULL)
a3c62988
NC		 2024 return TRUE;
2025
2026 /* Call the generic code to do most of the work. */
2027 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2028 return FALSE;
2029
ce558b89
AM		 2030 /* The header goes at the start of the dynamic .got section, which
2031 is placed after the dynamic .got.plt section. ie. The header is
2032 not necessarily at the start of the output .got section. */
2033 htab->etab.sgot->size += 12;
a3c62988 2034
ce558b89 2035 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
a3c62988
NC		 2036 bh = NULL;
2037 if (!(_bfd_generic_link_add_one_symbol
ce558b89 2038 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot,
a3c62988
NC		 2039 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2040 return FALSE;
2041 eh = (struct elf_link_hash_entry *) bh;
2042 eh->def_regular = 1;
2043 eh->type = STT_OBJECT;
2044 eh->other = STV_HIDDEN;
2045
0e1862bb 2046 if (! bfd_link_executable (info)
a3c62988
NC		 2047 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2048 return FALSE;
2049
ce558b89 2050 htab->etab.hgot = eh;
a3c62988 2051
a3c62988
NC		 2052 return TRUE;
2053}
2054
2055/* Look through the relocs for a section during the first phase, and
2056 calculate needed space in the global offset table, procedure linkage
2057 table, and dynamic reloc sections. At this point we haven't
2058 necessarily read all the input files. */
2059
2060static bfd_boolean
2061elf_metag_check_relocs (bfd *abfd,
2062 struct bfd_link_info *info,
2063 asection *sec,
2064 const Elf_Internal_Rela *relocs)
2065{
2066 Elf_Internal_Shdr *symtab_hdr;
2067 struct elf_link_hash_entry **eh_syms;
2068 const Elf_Internal_Rela *rel;
2069 const Elf_Internal_Rela *rel_end;
2070 struct elf_metag_link_hash_table *htab;
2071 asection *sreloc;
2072 bfd *dynobj;
2073 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2074
0e1862bb 2075 if (bfd_link_relocatable (info))
a3c62988
NC		 2076 return TRUE;
2077
2078 htab = metag_link_hash_table (info);
2079 dynobj = htab->etab.dynobj;
2080 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2081 eh_syms = elf_sym_hashes (abfd);
2082 sreloc = NULL;
2083
2084 if (htab == NULL)
2085 return FALSE;
2086
2087 rel_end = relocs + sec->reloc_count;
2088 for (rel = relocs; rel < rel_end; rel++)
2089 {
2090 int r_type;
2091 struct elf_metag_link_hash_entry *hh;
1a18f0ae 2092 Elf_Internal_Sym *isym;
a3c62988
NC		 2093 unsigned long r_symndx;
2094
2095 r_symndx = ELF32_R_SYM (rel->r_info);
2096 r_type = ELF32_R_TYPE (rel->r_info);
2097 if (r_symndx < symtab_hdr->sh_info)
1a18f0ae
NC		 2098 {
2099 /* A local symbol. */
2100 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2101 abfd, r_symndx);
2102 if (isym == NULL)
2103 return FALSE;
2104
2105 hh = NULL;
2106 }
a3c62988
NC		 2107 else
2108 {
1a18f0ae
NC		 2109 isym = NULL;
2110
a3c62988
NC		 2111 hh = (struct elf_metag_link_hash_entry *)
2112 eh_syms[r_symndx - symtab_hdr->sh_info];
2113 while (hh->eh.root.type == bfd_link_hash_indirect
2114 || hh->eh.root.type == bfd_link_hash_warning)
2115 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2116 }
2117
2118 /* Some relocs require a global offset table. */
ce558b89 2119 if (htab->etab.sgot == NULL)
a3c62988
NC		 2120 {
2121 switch (r_type)
2122 {
2123 case R_METAG_TLS_GD:
2124 case R_METAG_TLS_LDM:
2125 case R_METAG_TLS_IE:
0e1862bb 2126 if (bfd_link_pic (info))
a3c62988
NC		 2127 info->flags |= DF_STATIC_TLS;
2128 /* Fall through. */
2129
2130 case R_METAG_HI16_GOTOFF:
2131 case R_METAG_LO16_GOTOFF:
2132 case R_METAG_GETSET_GOTOFF:
2133 case R_METAG_GETSET_GOT:
2134 case R_METAG_HI16_GOTPC:
2135 case R_METAG_LO16_GOTPC:
2136 if (dynobj == NULL)
2137 htab->etab.dynobj = dynobj = abfd;
2138 if (!elf_metag_create_dynamic_sections (dynobj, info))
2139 return FALSE;
2140 break;
2141
2142 default:
2143 break;
2144 }
2145 }
2146
2147 switch (r_type)
2148 {
2149 case R_METAG_TLS_IE:
2150 case R_METAG_TLS_GD:
2151 case R_METAG_GETSET_GOT:
2152 switch (r_type)
2153 {
2154 default:
2155 tls_type = GOT_NORMAL;
2156 break;
2157 case R_METAG_TLS_IE:
2158 tls_type = GOT_TLS_IE;
2159 break;
2160 case R_METAG_TLS_GD:
2161 tls_type = GOT_TLS_GD;
2162 break;
2163 }
2164
2165 if (hh != NULL)
2166 {
2167 hh->eh.got.refcount += 1;
2168 old_tls_type = hh->tls_type;
2169 }
2170 else
2171 {
2172 bfd_signed_vma *local_got_refcounts;
2173
2174 /* This is a global offset table entry for a local
2175 symbol. */
2176 local_got_refcounts = elf_local_got_refcounts (abfd);
2177 if (local_got_refcounts == NULL)
2178 {
2179 bfd_size_type size;
2180
2181 size = symtab_hdr->sh_info;
2182 size *= sizeof (bfd_signed_vma);
2183 /* Add in space to store the local GOT TLS types. */
2184 size += symtab_hdr->sh_info;
2185 local_got_refcounts = ((bfd_signed_vma *)
2186 bfd_zalloc (abfd, size));
2187 if (local_got_refcounts == NULL)
2188 return FALSE;
2189 elf_local_got_refcounts (abfd) = local_got_refcounts;
2190 memset (metag_elf_local_got_tls_type (abfd),
2191 GOT_UNKNOWN, symtab_hdr->sh_info);
2192 }
2193 local_got_refcounts[r_symndx] += 1;
2194 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2195 }
2196
2197 if (old_tls_type != tls_type)
2198 {
2199 if (hh != NULL)
2200 {
2201 hh->tls_type = tls_type;
2202 }
2203 else
2204 {
2205 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2206 }
2207 }
2208
2209 break;
2210
2211 case R_METAG_TLS_LDM:
2212 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2213 break;
2214
2215 case R_METAG_RELBRANCH_PLT:
2216 /* This symbol requires a procedure linkage table entry. We
2217 actually build the entry in adjust_dynamic_symbol,
2218 because this might be a case of linking PIC code without
2219 linking in any dynamic objects, in which case we don't
2220 need to generate a procedure linkage table after all. */
2221
2222 /* If this is a local symbol, we resolve it directly without
2223 creating a procedure linkage table entry. */
2224 if (hh == NULL)
2225 continue;
2226
2227 if (hh->eh.forced_local)
2228 break;
2229
2230 hh->eh.needs_plt = 1;
2231 hh->eh.plt.refcount += 1;
2232 break;
2233
a3c62988
NC		 2234 case R_METAG_HIADDR16:
2235 case R_METAG_LOADDR16:
1a18f0ae
NC		 2236 /* Let's help debug shared library creation. These relocs
2237 cannot be used in shared libs. Don't error out for
2238 sections we don't care about, such as debug sections or
2239 non-constant sections. */
0e1862bb 2240 if (bfd_link_pic (info)
1a18f0ae
NC		 2241 && (sec->flags & SEC_ALLOC) != 0
2242 && (sec->flags & SEC_READONLY) != 0)
2243 {
2244 const char *name;
2245
2246 if (hh)
2247 name = hh->eh.root.root.string;
2248 else
2249 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
4eca0228 2250 _bfd_error_handler
695344c0 2251 /* xgettext:c-format */
871b3ab2 2252 (_("%pB: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1a18f0ae
NC		 2253 abfd, elf_metag_howto_table[r_type].name, name);
2254 bfd_set_error (bfd_error_bad_value);
2255 return FALSE;
2256 }
2257
2258 /* Fall through. */
2259 case R_METAG_ADDR32:
a3c62988
NC		 2260 case R_METAG_RELBRANCH:
2261 case R_METAG_GETSETOFF:
0e1862bb 2262 if (hh != NULL && !bfd_link_pic (info))
a3c62988
NC		 2263 {
2264 hh->eh.non_got_ref = 1;
2265 hh->eh.plt.refcount += 1;
2266 }
2267
2268 /* If we are creating a shared library, and this is a reloc
2269 against a global symbol, or a non PC relative reloc
2270 against a local symbol, then we need to copy the reloc
2271 into the shared library. However, if we are linking with
2272 -Bsymbolic, we do not need to copy a reloc against a
2273 global symbol which is defined in an object we are
2274 including in the link (i.e., DEF_REGULAR is set). At
2275 this point we have not seen all the input files, so it is
2276 possible that DEF_REGULAR is not set now but will be set
2277 later (it is never cleared). We account for that
2278 possibility below by storing information in the
2279 dyn_relocs field of the hash table entry. A similar
2280 situation occurs when creating shared libraries and symbol
2281 visibility changes render the symbol local.
2282
2283 If on the other hand, we are creating an executable, we
2284 may need to keep relocations for symbols satisfied by a
2285 dynamic library if we manage to avoid copy relocs for the
2286 symbol. */
0e1862bb 2287 if ((bfd_link_pic (info)
a3c62988
NC		 2288 && (sec->flags & SEC_ALLOC) != 0
2289 && (r_type != R_METAG_RELBRANCH
2290 || (hh != NULL
2291 && (! info->symbolic
2292 || hh->eh.root.type == bfd_link_hash_defweak
2293 || !hh->eh.def_regular))))
0e1862bb 2294 || (!bfd_link_pic (info)
a3c62988
NC		 2295 && (sec->flags & SEC_ALLOC) != 0
2296 && hh != NULL
2297 && (hh->eh.root.type == bfd_link_hash_defweak
2298 || !hh->eh.def_regular)))
2299 {
3bf083ed
AM		 2300 struct elf_dyn_relocs *hdh_p;
2301 struct elf_dyn_relocs **hdh_head;
a3c62988
NC		 2302
2303 if (dynobj == NULL)
2304 htab->etab.dynobj = dynobj = abfd;
2305
2306 /* When creating a shared object, we must copy these
2307 relocs into the output file. We create a reloc
2308 section in dynobj and make room for the reloc. */
2309 if (sreloc == NULL)
2310 {
2311 sreloc = _bfd_elf_make_dynamic_reloc_section
2312 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2313
2314 if (sreloc == NULL)
2315 {
2316 bfd_set_error (bfd_error_bad_value);
2317 return FALSE;
2318 }
2319
2320 elf_section_data (sec)->sreloc = sreloc;
2321 }
2322
2323 /* If this is a global symbol, we count the number of
2324 relocations we need for this symbol. */
2325 if (hh != NULL)
190eb1dd 2326 hdh_head = &hh->eh.dyn_relocs;
a3c62988
NC		 2327 else
2328 {
2329 /* Track dynamic relocs needed for local syms too. */
2330 asection *sr;
2331 void *vpp;
a3c62988
NC		 2332
2333 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2334 if (sr == NULL)
2335 sr = sec;
2336
2337 vpp = &elf_section_data (sr)->local_dynrel;
3bf083ed 2338 hdh_head = (struct elf_dyn_relocs **) vpp;
a3c62988
NC		 2339 }
2340
2341 hdh_p = *hdh_head;
2342 if (hdh_p == NULL || hdh_p->sec != sec)
2343 {
3bf083ed 2344 hdh_p = ((struct elf_dyn_relocs *)
a3c62988
NC		 2345 bfd_alloc (dynobj, sizeof *hdh_p));
2346 if (hdh_p == NULL)
2347 return FALSE;
3bf083ed 2348 hdh_p->next = *hdh_head;
a3c62988
NC		 2349 *hdh_head = hdh_p;
2350 hdh_p->sec = sec;
2351 hdh_p->count = 0;
3bf083ed 2352 hdh_p->pc_count = 0;
a3c62988
NC		 2353 }
2354
2355 hdh_p->count += 1;
2356 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3bf083ed 2357 hdh_p->pc_count += 1;
a3c62988
NC		 2358 }
2359 break;
2360
2361 /* This relocation describes the C++ object vtable hierarchy.
2362 Reconstruct it for later use during GC. */
2363 case R_METAG_GNU_VTINHERIT:
2364 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2365 rel->r_offset))
2366 return FALSE;
2367 break;
2368
2369 /* This relocation describes which C++ vtable entries are actually
2370 used. Record for later use during GC. */
2371 case R_METAG_GNU_VTENTRY:
a0ea3a14 2372 if (!bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
a3c62988
NC		 2373 return FALSE;
2374 break;
2375 }
2376 }
2377
2378 return TRUE;
2379}
2380
2381/* Copy the extra info we tack onto an elf_link_hash_entry. */
2382
2383static void
2384elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2385 struct elf_link_hash_entry *eh_dir,
2386 struct elf_link_hash_entry *eh_ind)
2387{
2388 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2389
2390 hh_dir = metag_elf_hash_entry (eh_dir);
2391 hh_ind = metag_elf_hash_entry (eh_ind);
2392
a3c62988
NC		 2393 if (eh_ind->root.type == bfd_link_hash_indirect
2394 && eh_dir->got.refcount <= 0)
2395 {
2396 hh_dir->tls_type = hh_ind->tls_type;
2397 hh_ind->tls_type = GOT_UNKNOWN;
2398 }
2399
2400 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2401}
2402
2403/* Adjust a symbol defined by a dynamic object and referenced by a
2404 regular object. The current definition is in some section of the
2405 dynamic object, but we're not including those sections. We have to
2406 change the definition to something the rest of the link can
2407 understand. */
2408
2409static bfd_boolean
2410elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2411 struct elf_link_hash_entry *eh)
2412{
2413 struct elf_metag_link_hash_table *htab;
5474d94f 2414 asection *s, *srel;
a3c62988
NC		 2415
2416 /* If this is a function, put it in the procedure linkage table. We
2417 will fill in the contents of the procedure linkage table later,
2418 when we know the address of the .got section. */
2419 if (eh->type == STT_FUNC
2420 || eh->needs_plt)
2421 {
2422 if (eh->plt.refcount <= 0
2423 || SYMBOL_CALLS_LOCAL (info, eh)
2424 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2425 && eh->root.type == bfd_link_hash_undefweak))
2426 {
2427 /* This case can occur if we saw a PLT reloc in an input
2428 file, but the symbol was never referred to by a dynamic
2429 object. In such a case, we don't actually need to build
2430 a procedure linkage table, and we can just do a PCREL
2431 reloc instead. */
2432 eh->plt.offset = (bfd_vma) -1;
2433 eh->needs_plt = 0;
2434 }
2435
2436 return TRUE;
2437 }
2438 else
2439 eh->plt.offset = (bfd_vma) -1;
2440
2441 /* If this is a weak symbol, and there is a real definition, the
2442 processor independent code will have arranged for us to see the
2443 real definition first, and we can just use the same value. */
60d67dc8 2444 if (eh->is_weakalias)
a3c62988 2445 {
60d67dc8
AM		 2446 struct elf_link_hash_entry *def = weakdef (eh);
2447 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2448 eh->root.u.def.section = def->root.u.def.section;
2449 eh->root.u.def.value = def->root.u.def.value;
2450 eh->non_got_ref = def->non_got_ref;
a3c62988
NC		 2451 return TRUE;
2452 }
2453
2454 /* This is a reference to a symbol defined by a dynamic object which
2455 is not a function. */
2456
2457 /* If we are creating a shared library, we must presume that the
2458 only references to the symbol are via the global offset table.
2459 For such cases we need not do anything here; the relocations will
2460 be handled correctly by relocate_section. */
0e1862bb 2461 if (bfd_link_pic (info))
a3c62988
NC		 2462 return TRUE;
2463
2464 /* If there are no references to this symbol that do not use the
2465 GOT, we don't need to generate a copy reloc. */
2466 if (!eh->non_got_ref)
2467 return TRUE;
2468
2469 /* If -z nocopyreloc was given, we won't generate them either. */
2470 if (info->nocopyreloc)
2471 {
2472 eh->non_got_ref = 0;
2473 return TRUE;
2474 }
2475
3bf083ed 2476 /* If we don't find any dynamic relocs in read-only sections, then
a3c62988 2477 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5dbc8b37 2478 if (!_bfd_elf_readonly_dynrelocs (eh))
a3c62988
NC		 2479 {
2480 eh->non_got_ref = 0;
2481 return TRUE;
2482 }
2483
a3c62988
NC		 2484 /* We must allocate the symbol in our .dynbss section, which will
2485 become part of the .bss section of the executable. There will be
2486 an entry for this symbol in the .dynsym section. The dynamic
2487 object will contain position independent code, so all references
2488 from the dynamic object to this symbol will go through the global
2489 offset table. The dynamic linker will use the .dynsym entry to
2490 determine the address it must put in the global offset table, so
2491 both the dynamic object and the regular object will refer to the
2492 same memory location for the variable. */
2493
2494 htab = metag_link_hash_table (info);
2495
2496 /* We must generate a COPY reloc to tell the dynamic linker to
2497 copy the initial value out of the dynamic object and into the
2498 runtime process image. */
5474d94f
AM		 2499 if ((eh->root.u.def.section->flags & SEC_READONLY) != 0)
2500 {
2501 s = htab->etab.sdynrelro;
2502 srel = htab->etab.sreldynrelro;
2503 }
2504 else
2505 {
2506 s = htab->etab.sdynbss;
2507 srel = htab->etab.srelbss;
2508 }
34c67f14 2509 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
a3c62988 2510 {
5474d94f 2511 srel->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2512 eh->needs_copy = 1;
2513 }
2514
6cabe1ea 2515 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
a3c62988
NC		 2516}
2517
2518/* Allocate space in .plt, .got and associated reloc sections for
2519 global syms. */
2520
2521static bfd_boolean
2522allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2523{
2524 struct bfd_link_info *info;
2525 struct elf_metag_link_hash_table *htab;
3bf083ed 2526 struct elf_dyn_relocs *hdh_p;
a3c62988
NC		 2527
2528 if (eh->root.type == bfd_link_hash_indirect)
2529 return TRUE;
2530
2531 if (eh->root.type == bfd_link_hash_warning)
2532 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2533
2534 info = inf;
2535 htab = metag_link_hash_table (info);
2536
2537 if (htab->etab.dynamic_sections_created
2538 && eh->plt.refcount > 0)
2539 {
2540 /* Make sure this symbol is output as a dynamic symbol.
2541 Undefined weak syms won't yet be marked as dynamic. */
2542 if (eh->dynindx == -1
2543 && !eh->forced_local)
2544 {
2545 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2546 return FALSE;
2547 }
2548
0e1862bb 2549 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
a3c62988 2550 {
ce558b89 2551 asection *s = htab->etab.splt;
a3c62988
NC		 2552
2553 /* If this is the first .plt entry, make room for the special
2554 first entry. */
2555 if (s->size == 0)
2556 s->size += PLT_ENTRY_SIZE;
2557
2558 eh->plt.offset = s->size;
2559
2560 /* If this symbol is not defined in a regular file, and we are
2561 not generating a shared library, then set the symbol to this
2562 location in the .plt. This is required to make function
2563 pointers compare as equal between the normal executable and
2564 the shared library. */
0e1862bb 2565 if (! bfd_link_pic (info)
a3c62988
NC		 2566 && !eh->def_regular)
2567 {
2568 eh->root.u.def.section = s;
2569 eh->root.u.def.value = eh->plt.offset;
2570 }
2571
2572 /* Make room for this entry. */
2573 s->size += PLT_ENTRY_SIZE;
2574
2575 /* We also need to make an entry in the .got.plt section, which
2576 will be placed in the .got section by the linker script. */
ce558b89 2577 htab->etab.sgotplt->size += 4;
a3c62988
NC		 2578
2579 /* We also need to make an entry in the .rel.plt section. */
ce558b89 2580 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2581 }
2582 else
2583 {
2584 eh->plt.offset = (bfd_vma) -1;
2585 eh->needs_plt = 0;
2586 }
2587 }
2588 else
2589 {
2590 eh->plt.offset = (bfd_vma) -1;
2591 eh->needs_plt = 0;
2592 }
2593
2594 if (eh->got.refcount > 0)
2595 {
2596 asection *s;
2597 bfd_boolean dyn;
2598 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2599
2600 /* Make sure this symbol is output as a dynamic symbol.
2601 Undefined weak syms won't yet be marked as dynamic. */
2602 if (eh->dynindx == -1
2603 && !eh->forced_local)
2604 {
2605 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2606 return FALSE;
2607 }
2608
ce558b89 2609 s = htab->etab.sgot;
a3c62988
NC		 2610
2611 eh->got.offset = s->size;
2612 s->size += 4;
2613 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2614 if (tls_type == GOT_TLS_GD)
2615 s->size += 4;
2616 dyn = htab->etab.dynamic_sections_created;
2617 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2618 R_METAG_TLS_GD needs one if local symbol and two if global. */
2619 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2620 || (tls_type == GOT_TLS_IE && dyn))
ce558b89 2621 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988 2622 else if (tls_type == GOT_TLS_GD)
ce558b89 2623 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
0e1862bb
L		 2624 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2625 bfd_link_pic (info),
2626 eh))
ce558b89 2627 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2628 }
2629 else
2630 eh->got.offset = (bfd_vma) -1;
2631
190eb1dd 2632 if (eh->dyn_relocs == NULL)
a3c62988
NC		 2633 return TRUE;
2634
2635 /* If this is a -Bsymbolic shared link, then we need to discard all
2636 space allocated for dynamic pc-relative relocs against symbols
2637 defined in a regular object. For the normal shared case, discard
2638 space for relocs that have become local due to symbol visibility
2639 changes. */
0e1862bb 2640 if (bfd_link_pic (info))
a3c62988
NC		 2641 {
2642 if (SYMBOL_CALLS_LOCAL (info, eh))
2643 {
3bf083ed 2644 struct elf_dyn_relocs **hdh_pp;
a3c62988 2645
190eb1dd 2646 for (hdh_pp = &eh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
a3c62988 2647 {
3bf083ed
AM		 2648 hdh_p->count -= hdh_p->pc_count;
2649 hdh_p->pc_count = 0;
a3c62988 2650 if (hdh_p->count == 0)
3bf083ed 2651 *hdh_pp = hdh_p->next;
a3c62988 2652 else
3bf083ed 2653 hdh_pp = &hdh_p->next;
a3c62988
NC		 2654 }
2655 }
2656
2657 /* Also discard relocs on undefined weak syms with non-default
2658 visibility. */
190eb1dd 2659 if (eh->dyn_relocs != NULL
a3c62988
NC		 2660 && eh->root.type == bfd_link_hash_undefweak)
2661 {
2662 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
190eb1dd 2663 eh->dyn_relocs = NULL;
a3c62988
NC		 2664
2665 /* Make sure undefined weak symbols are output as a dynamic
2666 symbol in PIEs. */
2667 else if (eh->dynindx == -1
2668 && !eh->forced_local)
2669 {
2670 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2671 return FALSE;
2672 }
2673 }
2674 }
2675 else
2676 {
2677 /* For the non-shared case, discard space for relocs against
2678 symbols which turn out to need copy relocs or are not
2679 dynamic. */
2680 if (!eh->non_got_ref
2681 && ((eh->def_dynamic
2682 && !eh->def_regular)
2683 || (htab->etab.dynamic_sections_created
2684 && (eh->root.type == bfd_link_hash_undefweak
2685 || eh->root.type == bfd_link_hash_undefined))))
2686 {
2687 /* Make sure this symbol is output as a dynamic symbol.
2688 Undefined weak syms won't yet be marked as dynamic. */
2689 if (eh->dynindx == -1
2690 && !eh->forced_local)
2691 {
2692 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2693 return FALSE;
2694 }
2695
2696 /* If that succeeded, we know we'll be keeping all the
2697 relocs. */
2698 if (eh->dynindx != -1)
2699 goto keep;
2700 }
2701
190eb1dd 2702 eh->dyn_relocs = NULL;
a3c62988
NC		 2703 return TRUE;
2704
2705 keep: ;
2706 }
2707
2708 /* Finally, allocate space. */
190eb1dd 2709 for (hdh_p = eh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->next)
a3c62988
NC		 2710 {
2711 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2712 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2713 }
2714
2715 return TRUE;
2716}
2717
63c1f59d
AM		 2718/* Set DF_TEXTREL if we find any dynamic relocs that apply to
2719 read-only sections. */
a3c62988
NC		 2720
2721static bfd_boolean
63c1f59d 2722maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
a3c62988 2723{
63c1f59d 2724 asection *sec;
a3c62988 2725
63c1f59d
AM		 2726 if (h->root.type == bfd_link_hash_indirect)
2727 return TRUE;
a3c62988 2728
5dbc8b37 2729 sec = _bfd_elf_readonly_dynrelocs (h);
63c1f59d 2730 if (sec != NULL)
a3c62988 2731 {
63c1f59d 2732 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
a3c62988 2733
63c1f59d
AM		 2734 info->flags |= DF_TEXTREL;
2735 info->callbacks->minfo
c1c8c1ef 2736 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
63c1f59d 2737 sec->owner, h->root.root.string, sec);
a3c62988 2738
63c1f59d
AM		 2739 /* Not an error, just cut short the traversal. */
2740 return FALSE;
a3c62988
NC		 2741 }
2742 return TRUE;
2743}
2744
2745/* Set the sizes of the dynamic sections. */
2746
2747static bfd_boolean
2748elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2749 struct bfd_link_info *info)
2750{
2751 struct elf_metag_link_hash_table *htab;
2752 bfd *dynobj;
2753 bfd *ibfd;
2754 asection *s;
2755 bfd_boolean relocs;
2756
2757 htab = metag_link_hash_table (info);
2758 dynobj = htab->etab.dynobj;
2759 if (dynobj == NULL)
2760 abort ();
2761
2762 if (htab->etab.dynamic_sections_created)
2763 {
2764 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 2765 if (bfd_link_executable (info) && !info->nointerp)
a3c62988 2766 {
ad1fc92a 2767 s = bfd_get_linker_section (dynobj, ".interp");
a3c62988
NC		 2768 if (s == NULL)
2769 abort ();
2770 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2771 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2772 }
2773 }
2774
2775 /* Set up .got offsets for local syms, and space for local dynamic
2776 relocs. */
c72f2fb2 2777 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
a3c62988
NC		 2778 {
2779 bfd_signed_vma *local_got;
2780 bfd_signed_vma *end_local_got;
2781 bfd_size_type locsymcount;
2782 Elf_Internal_Shdr *symtab_hdr;
2783 asection *srel;
2784 char *local_tls_type;
2785
2786 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2787 continue;
2788
2789 for (s = ibfd->sections; s != NULL; s = s->next)
2790 {
3bf083ed 2791 struct elf_dyn_relocs *hdh_p;
a3c62988 2792
3bf083ed 2793 for (hdh_p = ((struct elf_dyn_relocs *)
a3c62988
NC		 2794 elf_section_data (s)->local_dynrel);
2795 hdh_p != NULL;
3bf083ed 2796 hdh_p = hdh_p->next)
a3c62988
NC		 2797 {
2798 if (!bfd_is_abs_section (hdh_p->sec)
2799 && bfd_is_abs_section (hdh_p->sec->output_section))
2800 {
2801 /* Input section has been discarded, either because
2802 it is a copy of a linkonce section or due to
2803 linker script /DISCARD/, so we'll be discarding
2804 the relocs too. */
2805 }
2806 else if (hdh_p->count != 0)
2807 {
2808 srel = elf_section_data (hdh_p->sec)->sreloc;
2809 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2810 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2811 info->flags |= DF_TEXTREL;
2812 }
2813 }
2814 }
2815
2816 local_got = elf_local_got_refcounts (ibfd);
2817 if (!local_got)
2818 continue;
2819
2820 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2821 locsymcount = symtab_hdr->sh_info;
2822 end_local_got = local_got + locsymcount;
2823 local_tls_type = metag_elf_local_got_tls_type (ibfd);
ce558b89
AM		 2824 s = htab->etab.sgot;
2825 srel = htab->etab.srelgot;
a3c62988
NC		 2826 for (; local_got < end_local_got; ++local_got)
2827 {
2828 if (*local_got > 0)
2829 {
2830 *local_got = s->size;
2831 s->size += GOT_ENTRY_SIZE;
2832 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2833 if (*local_tls_type == GOT_TLS_GD)
2834 s->size += 4;
0e1862bb 2835 if (bfd_link_pic (info))
a3c62988
NC		 2836 srel->size += sizeof (Elf32_External_Rela);
2837 }
2838 else
2839 *local_got = (bfd_vma) -1;
2840 ++local_tls_type;
2841 }
2842 }
2843
2844 if (htab->tls_ldm_got.refcount > 0)
2845 {
2846 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2847 reloc. */
ce558b89
AM		 2848 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2849 htab->etab.sgot->size += 8;
2850 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
a3c62988
NC		 2851 }
2852 else
2853 htab->tls_ldm_got.offset = -1;
2854
2855 /* Allocate global sym .plt and .got entries, and space for global
2856 sym dynamic relocs. */
2857 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2858
2859 /* We now have determined the sizes of the various dynamic sections.
2860 Allocate memory for them. */
2861 relocs = FALSE;
2862 for (s = dynobj->sections; s != NULL; s = s->next)
2863 {
2864 bfd_boolean reloc_section = FALSE;
2865
2866 if ((s->flags & SEC_LINKER_CREATED) == 0)
2867 continue;
2868
ce558b89
AM		 2869 if (s == htab->etab.splt
2870 || s == htab->etab.sgot
2871 || s == htab->etab.sgotplt
5474d94f
AM		 2872 || s == htab->etab.sdynbss
2873 || s == htab->etab.sdynrelro)
a3c62988
NC		 2874 {
2875 /* Strip this section if we don't need it; see the
2876 comment below. */
2877 }
fd361982 2878 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
a3c62988 2879 {
ce558b89 2880 if (s->size != 0 && s != htab->etab.srelplt)
a3c62988
NC		 2881 relocs = TRUE;
2882
2883 /* We use the reloc_count field as a counter if we need
2884 to copy relocs into the output file. */
2885 s->reloc_count = 0;
2886 reloc_section = TRUE;
2887 }
2888 else
2889 {
2890 /* It's not one of our sections, so don't allocate space. */
2891 continue;
2892 }
2893
2894 if (s->size == 0)
2895 {
2896 /* If we don't need this section, strip it from the
2897 output file. This is mostly to handle .rela.bss and
2898 .rela.plt. We must create both sections in
2899 create_dynamic_sections, because they must be created
2900 before the linker maps input sections to output
2901 sections. The linker does that before
2902 adjust_dynamic_symbol is called, and it is that
2903 function which decides whether anything needs to go
2904 into these sections. */
2905 s->flags |= SEC_EXCLUDE;
2906 continue;
2907 }
2908
2909 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2910 continue;
2911
2912 /* Allocate memory for the section contents. */
2913 s->contents = bfd_zalloc (dynobj, s->size);
2914 if (s->contents == NULL)
2915 return FALSE;
2916 else if (reloc_section)
2917 {
2918 unsigned char *contents = s->contents;
2919 Elf32_External_Rela reloc;
2920
2921 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2922 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2923 reloc.r_info[0] = R_METAG_NONE;
2924 for (; contents < (s->contents + s->size);
2925 contents += sizeof(Elf32_External_Rela))
2926 {
2927 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
2928 }
2929 }
2930 }
2931
2932 if (htab->etab.dynamic_sections_created)
2933 {
2934 /* Add some entries to the .dynamic section. We fill in the
2935 values later, in elf_metag_finish_dynamic_sections, but we
2936 must add the entries now so that we get the correct size for
2937 the .dynamic section. The DT_DEBUG entry is filled in by the
2938 dynamic linker and used by the debugger. */
2939#define add_dynamic_entry(TAG, VAL) \
2940 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2941
2942 if (!add_dynamic_entry (DT_PLTGOT, 0))
2943 return FALSE;
2944
0e1862bb 2945 if (bfd_link_executable (info))
a3c62988
NC		 2946 {
2947 if (!add_dynamic_entry (DT_DEBUG, 0))
2948 return FALSE;
2949 }
2950
ce558b89 2951 if (htab->etab.srelplt->size != 0)
a3c62988
NC		 2952 {
2953 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2954 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2955 || !add_dynamic_entry (DT_JMPREL, 0))
2956 return FALSE;
2957 }
2958
2959 if (relocs)
2960 {
2961 if (!add_dynamic_entry (DT_RELA, 0)
2962 || !add_dynamic_entry (DT_RELASZ, 0)
2963 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2964 return FALSE;
2965
2966 /* If any dynamic relocs apply to a read-only section,
2967 then we need a DT_TEXTREL entry. */
2968 if ((info->flags & DF_TEXTREL) == 0)
63c1f59d 2969 elf_link_hash_traverse (&htab->etab, maybe_set_textrel, info);
a3c62988
NC		 2970
2971 if ((info->flags & DF_TEXTREL) != 0)
2972 {
2973 if (!add_dynamic_entry (DT_TEXTREL, 0))
2974 return FALSE;
2975 }
2976 }
2977 }
2978#undef add_dynamic_entry
2979
2980 return TRUE;
2981}
2982
2983/* Finish up dynamic symbol handling. We set the contents of various
2984 dynamic sections here. */
2985
2986static bfd_boolean
2987elf_metag_finish_dynamic_symbol (bfd *output_bfd,
2988 struct bfd_link_info *info,
2989 struct elf_link_hash_entry *eh,
2990 Elf_Internal_Sym *sym)
2991{
2992 struct elf_metag_link_hash_table *htab;
2993 Elf_Internal_Rela rel;
2994 bfd_byte *loc;
2995
2996 htab = metag_link_hash_table (info);
2997
2998 if (eh->plt.offset != (bfd_vma) -1)
2999 {
3000 asection *splt;
3001 asection *sgot;
3002 asection *srela;
3003
3004 bfd_vma plt_index;
3005 bfd_vma got_offset;
3006 bfd_vma got_entry;
3007
3008 if (eh->plt.offset & 1)
3009 abort ();
3010
3011 BFD_ASSERT (eh->dynindx != -1);
3012
ce558b89
AM		 3013 splt = htab->etab.splt;
3014 sgot = htab->etab.sgotplt;
3015 srela = htab->etab.srelplt;
a3c62988
NC		 3016 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3017
3018 /* Get the index in the procedure linkage table which
3019 corresponds to this symbol. This is the index of this symbol
3020 in all the symbols for which we are making plt entries. The
3021 first entry in the procedure linkage table is reserved. */
3022 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3023
3024 /* Get the offset into the .got.plt table of the entry that
3025 corresponds to this function. */
3026 got_offset = plt_index * GOT_ENTRY_SIZE;
3027
3028 BFD_ASSERT (got_offset < (1 << 16));
3029
3030 got_entry = sgot->output_section->vma
3031 + sgot->output_offset
3032 + got_offset;
3033
3034 BFD_ASSERT (plt_index < (1 << 16));
3035
3036 /* Fill in the entry in the procedure linkage table. */
0e1862bb 3037 if (! bfd_link_pic (info))
a3c62988
NC		 3038 {
3039 bfd_put_32 (output_bfd,
3040 (plt_entry[0]
3041 | (((got_entry >> 16) & 0xffff) << 3)),
3042 splt->contents + eh->plt.offset);
3043 bfd_put_32 (output_bfd,
3044 (plt_entry[1]
3045 | ((got_entry & 0xffff) << 3)),
3046 splt->contents + eh->plt.offset + 4);
3047 bfd_put_32 (output_bfd, plt_entry[2],
3048 splt->contents + eh->plt.offset + 8);
3049 bfd_put_32 (output_bfd,
3050 (plt_entry[3] | (plt_index << 3)),
3051 splt->contents + eh->plt.offset + 12);
3052 bfd_put_32 (output_bfd,
3053 (plt_entry[4]
3054 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3055 splt->contents + eh->plt.offset + 16);
3056 }
3057 else
3058 {
3059 bfd_vma addr = got_entry - (splt->output_section->vma +
3060 splt->output_offset + eh->plt.offset);
3061
3062 bfd_put_32 (output_bfd,
3063 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3064 splt->contents + eh->plt.offset);
3065 bfd_put_32 (output_bfd,
3066 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3067 splt->contents + eh->plt.offset + 4);
3068 bfd_put_32 (output_bfd, plt_pic_entry[2],
3069 splt->contents + eh->plt.offset + 8);
3070 bfd_put_32 (output_bfd,
3071 (plt_pic_entry[3] | (plt_index << 3)),
3072 splt->contents + eh->plt.offset + 12);
3073 bfd_put_32 (output_bfd,
3074 (plt_pic_entry[4]
3075 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3076 splt->contents + eh->plt.offset + 16);
3077 }
3078
3079 /* Fill in the entry in the global offset table. */
3080 bfd_put_32 (output_bfd,
3081 (splt->output_section->vma
3082 + splt->output_offset
3083 + eh->plt.offset
3084 + 12), /* offset within PLT entry */
3085 sgot->contents + got_offset);
3086
3087 /* Fill in the entry in the .rela.plt section. */
3088 rel.r_offset = (sgot->output_section->vma
3089 + sgot->output_offset
3090 + got_offset);
3091 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3092 rel.r_addend = 0;
ce558b89 3093 loc = htab->etab.srelplt->contents;
a3c62988
NC		 3094 loc += plt_index * sizeof(Elf32_External_Rela);
3095 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3096
3097 if (!eh->def_regular)
3098 {
3099 /* Mark the symbol as undefined, rather than as defined in
3100 the .plt section. Leave the value alone. */
3101 sym->st_shndx = SHN_UNDEF;
3102 }
3103 }
3104
3105 if (eh->got.offset != (bfd_vma) -1
3106 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3107 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3108 {
3109 /* This symbol has an entry in the global offset table. Set it
3110 up. */
3111
3112 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
ce558b89
AM		 3113 + htab->etab.sgot->output_offset
3114 + htab->etab.sgot->output_section->vma);
a3c62988
NC		 3115
3116 /* If this is a -Bsymbolic link and the symbol is defined
3117 locally or was forced to be local because of a version file,
3118 we just want to emit a RELATIVE reloc. The entry in the
3119 global offset table will already have been initialized in the
3120 relocate_section function. */
0e1862bb 3121 if (bfd_link_pic (info)
a3c62988
NC		 3122 && (info->symbolic || eh->dynindx == -1)
3123 && eh->def_regular)
3124 {
3125 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3126 rel.r_addend = (eh->root.u.def.value
3127 + eh->root.u.def.section->output_offset
3128 + eh->root.u.def.section->output_section->vma);
3129 }
3130 else
3131 {
3132 if ((eh->got.offset & 1) != 0)
3133 abort ();
ce558b89 3134 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset);
a3c62988
NC		 3135 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3136 rel.r_addend = 0;
3137 }
3138
ce558b89
AM		 3139 loc = htab->etab.srelgot->contents;
3140 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
a3c62988
NC		 3141 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3142 }
3143
3144 if (eh->needs_copy)
3145 {
3146 asection *s;
3147
3148 /* This symbol needs a copy reloc. Set it up. */
3149
3150 if (! (eh->dynindx != -1
3151 && (eh->root.type == bfd_link_hash_defined
3152 || eh->root.type == bfd_link_hash_defweak)))
3153 abort ();
3154
a3c62988
NC		 3155 rel.r_offset = (eh->root.u.def.value
3156 + eh->root.u.def.section->output_offset
3157 + eh->root.u.def.section->output_section->vma);
3158 rel.r_addend = 0;
3159 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
afbf7e8e 3160 if (eh->root.u.def.section == htab->etab.sdynrelro)
5474d94f
AM		 3161 s = htab->etab.sreldynrelro;
3162 else
3163 s = htab->etab.srelbss;
a3c62988
NC		 3164 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3165 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3166 }
3167
3168 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3169 if (eh->root.root.string[0] == '_'
3170 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3171 || eh == htab->etab.hgot))
3172 {
3173 sym->st_shndx = SHN_ABS;
3174 }
3175
3176 return TRUE;
3177}
3178
3179/* Set the Meta ELF ABI version. */
3180
ed7e9d0b
AM		 3181static bfd_boolean
3182elf_metag_init_file_header (bfd *abfd, struct bfd_link_info *link_info)
a3c62988
NC		 3183{
3184 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3185
ed7e9d0b
AM		 3186 if (!_bfd_elf_init_file_header (abfd, link_info))
3187 return FALSE;
3188
a3c62988
NC		 3189 i_ehdrp = elf_elfheader (abfd);
3190 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
ed7e9d0b 3191 return TRUE;
a3c62988
NC		 3192}
3193
3194/* Used to decide how to sort relocs in an optimal manner for the
3195 dynamic linker, before writing them out. */
3196
3197static enum elf_reloc_type_class
7e612e98
AM		 3198elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3199 const asection *rel_sec ATTRIBUTE_UNUSED,
3200 const Elf_Internal_Rela *rela)
a3c62988
NC		 3201{
3202 switch ((int) ELF32_R_TYPE (rela->r_info))
3203 {
3204 case R_METAG_RELATIVE:
3205 return reloc_class_relative;
3206 case R_METAG_JMP_SLOT:
3207 return reloc_class_plt;
3208 case R_METAG_COPY:
3209 return reloc_class_copy;
3210 default:
3211 return reloc_class_normal;
3212 }
3213}
3214
3215/* Finish up the dynamic sections. */
3216
3217static bfd_boolean
3218elf_metag_finish_dynamic_sections (bfd *output_bfd,
3219 struct bfd_link_info *info)
3220{
3221 bfd *dynobj;
3222 struct elf_metag_link_hash_table *htab;
3223 asection *sdyn;
3224
3225 htab = metag_link_hash_table (info);
3226 dynobj = htab->etab.dynobj;
3227
ad1fc92a 3228 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
a3c62988
NC		 3229
3230 if (htab->etab.dynamic_sections_created)
3231 {
3232 asection *splt;
3233 Elf32_External_Dyn *dyncon, *dynconend;
3234
3235 if (sdyn == NULL)
3236 abort ();
3237
3238 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3239 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3240 for (; dyncon < dynconend; dyncon++)
3241 {
3242 Elf_Internal_Dyn dyn;
3243 asection *s;
3244
3245 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3246
3247 switch (dyn.d_tag)
3248 {
3249 default:
3250 continue;
3251
3252 case DT_PLTGOT:
ce558b89 3253 s = htab->etab.sgot;
4ade44b7 3254 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a3c62988
NC		 3255 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3256 break;
3257
3258 case DT_JMPREL:
ce558b89 3259 s = htab->etab.srelplt;
4ade44b7 3260 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a3c62988
NC		 3261 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3262 break;
3263
3264 case DT_PLTRELSZ:
ce558b89 3265 s = htab->etab.srelplt;
a3c62988
NC		 3266 dyn.d_un.d_val = s->size;
3267 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3268 break;
a3c62988
NC		 3269 }
3270
3271 }
3272
3273 /* Fill in the first entry in the procedure linkage table. */
ce558b89 3274 splt = htab->etab.splt;
a3c62988
NC		 3275 if (splt && splt->size > 0)
3276 {
3277 unsigned long addr;
3278 /* addr = .got + 4 */
ce558b89
AM		 3279 addr = (htab->etab.sgot->output_section->vma
3280 + htab->etab.sgot->output_offset + 4);
0e1862bb 3281 if (bfd_link_pic (info))
a3c62988
NC		 3282 {
3283 addr -= splt->output_section->vma + splt->output_offset;
3284 bfd_put_32 (output_bfd,
3285 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3286 splt->contents);
3287 bfd_put_32 (output_bfd,
3288 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3289 splt->contents + 4);
3290 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3291 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3292 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3293 }
3294 else
3295 {
3296 bfd_put_32 (output_bfd,
3297 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3298 splt->contents);
3299 bfd_put_32 (output_bfd,
3300 plt0_entry[1] | ((addr & 0xffff) << 3),
3301 splt->contents + 4);
3302 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3303 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3304 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3305 }
3306
3307 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3308 PLT_ENTRY_SIZE;
3309 }
3310 }
3311
ce558b89 3312 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
a3c62988
NC		 3313 {
3314 /* Fill in the first entry in the global offset table.
3315 We use it to point to our dynamic section, if we have one. */
3316 bfd_put_32 (output_bfd,
3317 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
ce558b89 3318 htab->etab.sgot->contents);
a3c62988
NC		 3319
3320 /* The second entry is reserved for use by the dynamic linker. */
ce558b89 3321 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
a3c62988
NC		 3322
3323 /* Set .got entry size. */
ce558b89 3324 elf_section_data (htab->etab.sgot->output_section)
a3c62988
NC		 3325 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3326 }
3327
3328 return TRUE;
3329}
3330
3331/* Return the section that should be marked against GC for a given
3332 relocation. */
3333
3334static asection *
3335elf_metag_gc_mark_hook (asection *sec,
3336 struct bfd_link_info *info,
3337 Elf_Internal_Rela *rela,
3338 struct elf_link_hash_entry *hh,
3339 Elf_Internal_Sym *sym)
3340{
3341 if (hh != NULL)
3342 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3343 {
3344 case R_METAG_GNU_VTINHERIT:
3345 case R_METAG_GNU_VTENTRY:
3346 return NULL;
3347 }
3348
3349 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3350}
3351
a3c62988
NC		 3352/* Determine the type of stub needed, if any, for a call. */
3353
3354static enum elf_metag_stub_type
3355metag_type_of_stub (asection *input_sec,
3356 const Elf_Internal_Rela *rel,
3357 struct elf_metag_link_hash_entry *hh,
3358 bfd_vma destination,
3359 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3360{
3361 bfd_vma location;
3362 bfd_vma branch_offset;
3363 bfd_vma max_branch_offset;
3364
3365 if (hh != NULL &&
3366 !(hh->eh.root.type == bfd_link_hash_defined
3367 || hh->eh.root.type == bfd_link_hash_defweak))
3368 return metag_stub_none;
3369
3370 /* Determine where the call point is. */
3371 location = (input_sec->output_offset
3372 + input_sec->output_section->vma
3373 + rel->r_offset);
3374
3375 branch_offset = destination - location;
3376
3377 /* Determine if a long branch stub is needed. Meta branch offsets
3378 are signed 19 bits 4 byte aligned. */
3379 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3380
3381 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3382 {
0e1862bb 3383 if (bfd_link_pic (info))
a3c62988
NC		 3384 return metag_stub_long_branch_shared;
3385 else
3386 return metag_stub_long_branch;
3387 }
3388
3389 return metag_stub_none;
3390}
3391
3392#define MOVT_A0_3 0x82180005
3393#define JUMP_A0_3 0xac180003
3394
3395#define MOVT_A1LBP 0x83080005
3396#define ADD_A1LBP 0x83080000
3397
3398#define ADDT_A0_3_CPC 0x82980001
3399#define ADD_A0_3_A0_3 0x82180000
3400#define MOV_PC_A0_3 0xa3180ca0
3401
3402static bfd_boolean
abf874aa 3403metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
a3c62988
NC		 3404{
3405 struct elf_metag_stub_hash_entry *hsh;
3406 asection *stub_sec;
3407 bfd *stub_bfd;
3408 bfd_byte *loc;
3409 bfd_vma sym_value;
3410 int size;
abf874aa 3411 struct bfd_link_info *info;
a3c62988
NC		 3412
3413 /* Massage our args to the form they really have. */
3414 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
abf874aa
CL		 3415 info = (struct bfd_link_info *) in_arg;
3416
3417 /* Fail if the target section could not be assigned to an output
3418 section. The user should fix his linker script. */
3419 if (hsh->target_section->output_section == NULL
3420 && info->non_contiguous_regions)
53215f21
CL		 3421 info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. "
3422 "Retry without --enable-non-contiguous-regions.\n"),
3423 hsh->target_section);
a3c62988
NC		 3424
3425 stub_sec = hsh->stub_sec;
3426
3427 /* Make a note of the offset within the stubs for this entry. */
3428 hsh->stub_offset = stub_sec->size;
3429 loc = stub_sec->contents + hsh->stub_offset;
3430
3431 stub_bfd = stub_sec->owner;
3432
3433 switch (hsh->stub_type)
3434 {
3435 case metag_stub_long_branch_shared:
3436 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3437 calculate the jump target using A0.3 as a temporary. Then a MOV
3438 to PC carries out the jump. */
3439 sym_value = (hsh->target_value
3440 + hsh->target_section->output_offset
3441 + hsh->target_section->output_section->vma
3442 + hsh->addend);
3443
3444 sym_value -= (hsh->stub_offset
3445 + stub_sec->output_offset
3446 + stub_sec->output_section->vma);
3447
3448 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3449 loc);
3450
3451 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3452 loc + 4);
3453
3454 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3455
3456 size = 12;
3457 break;
3458 case metag_stub_long_branch:
3459 /* A standard long branch stub is a MOVT instruction followed by a
3460 JUMP instruction using the A0.3 register as a temporary. This is
3461 the same method used by the LDLK linker (patch.c). */
3462 sym_value = (hsh->target_value
3463 + hsh->target_section->output_offset
3464 + hsh->target_section->output_section->vma
3465 + hsh->addend);
3466
3467 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3468 loc);
3469
3470 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3471
3472 size = 8;
3473 break;
3474 default:
3475 BFD_FAIL ();
3476 return FALSE;
3477 }
3478
3479 stub_sec->size += size;
3480 return TRUE;
3481}
3482
3483/* As above, but don't actually build the stub. Just bump offset so
3484 we know stub section sizes. */
3485
3486static bfd_boolean
3487metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3488{
3489 struct elf_metag_stub_hash_entry *hsh;
3490 int size = 0;
3491
3492 /* Massage our args to the form they really have. */
3493 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3494
3495 if (hsh->stub_type == metag_stub_long_branch)
3496 size = 8;
3497 else if (hsh->stub_type == metag_stub_long_branch_shared)
3498 size = 12;
3499
3500 hsh->stub_sec->size += size;
3501 return TRUE;
3502}
3503
3504/* Set up various things so that we can make a list of input sections
3505 for each output section included in the link. Returns -1 on error,
3506 0 when no stubs will be needed, and 1 on success. */
3507
3508int
3509elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3510{
3511 bfd *input_bfd;
3512 unsigned int bfd_count;
7292b3ac 3513 unsigned int top_id, top_index;
a3c62988
NC		 3514 asection *section;
3515 asection **input_list, **list;
986f0783 3516 size_t amt;
a3c62988
NC		 3517 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3518
3519 /* Count the number of input BFDs and find the top input section id. */
3520 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3521 input_bfd != NULL;
c72f2fb2 3522 input_bfd = input_bfd->link.next)
a3c62988
NC		 3523 {
3524 bfd_count += 1;
3525 for (section = input_bfd->sections;
3526 section != NULL;
3527 section = section->next)
3528 {
3529 if (top_id < section->id)
3530 top_id = section->id;
3531 }
3532 }
3533
3534 htab->bfd_count = bfd_count;
3535
3536 amt = sizeof (struct map_stub) * (top_id + 1);
3537 htab->stub_group = bfd_zmalloc (amt);
3538 if (htab->stub_group == NULL)
3539 return -1;
3540
3541 /* We can't use output_bfd->section_count here to find the top output
3542 section index as some sections may have been removed, and
3543 strip_excluded_output_sections doesn't renumber the indices. */
3544 for (section = output_bfd->sections, top_index = 0;
3545 section != NULL;
3546 section = section->next)
3547 {
3548 if (top_index < section->index)
3549 top_index = section->index;
3550 }
3551
3552 htab->top_index = top_index;
3553 amt = sizeof (asection *) * (top_index + 1);
3554 input_list = bfd_malloc (amt);
3555 htab->input_list = input_list;
3556 if (input_list == NULL)
3557 return -1;
3558
3559 /* For sections we aren't interested in, mark their entries with a
3560 value we can check later. */
3561 list = input_list + top_index;
3562 do
3563 *list = bfd_abs_section_ptr;
3564 while (list-- != input_list);
3565
3566 for (section = output_bfd->sections;
3567 section != NULL;
3568 section = section->next)
3569 {
3570 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3571 * have PC relative relocs in them but no code flag set. */
3572 if (((section->flags & SEC_CODE) != 0) ||
3573 strcmp(".ctors", section->name) ||
3574 strcmp(".dtors", section->name))
3575 input_list[section->index] = NULL;
3576 }
3577
3578 return 1;
3579}
3580
3581/* The linker repeatedly calls this function for each input section,
3582 in the order that input sections are linked into output sections.
3583 Build lists of input sections to determine groupings between which
3584 we may insert linker stubs. */
3585
3586void
3587elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3588{
3589 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3590
3591 if (isec->output_section->index <= htab->top_index)
3592 {
3593 asection **list = htab->input_list + isec->output_section->index;
3594 if (*list != bfd_abs_section_ptr)
3595 {
3596 /* Steal the link_sec pointer for our list. */
3597#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3598 /* This happens to make the list in reverse order,
3599 which is what we want. */
3600 PREV_SEC (isec) = *list;
3601 *list = isec;
3602 }
3603 }
3604}
3605
3606/* See whether we can group stub sections together. Grouping stub
3607 sections may result in fewer stubs. More importantly, we need to
3608 put all .init* and .fini* stubs at the beginning of the .init or
3609 .fini output sections respectively, because glibc splits the
3610 _init and _fini functions into multiple parts. Putting a stub in
3611 the middle of a function is not a good idea. */
3612
3613static void
3614group_sections (struct elf_metag_link_hash_table *htab,
3615 bfd_size_type stub_group_size,
3616 bfd_boolean stubs_always_before_branch)
3617{
3618 asection **list = htab->input_list + htab->top_index;
3619 do
3620 {
3621 asection *tail = *list;
3622 if (tail == bfd_abs_section_ptr)
3623 continue;
3624 while (tail != NULL)
3625 {
3626 asection *curr;
3627 asection *prev;
3628 bfd_size_type total;
3629 bfd_boolean big_sec;
3630
3631 curr = tail;
3632 total = tail->size;
3633 big_sec = total >= stub_group_size;
3634
3635 while ((prev = PREV_SEC (curr)) != NULL
3636 && ((total += curr->output_offset - prev->output_offset)
3637 < stub_group_size))
3638 curr = prev;
3639
3640 /* OK, the size from the start of CURR to the end is less
3641 than stub_group_size bytes and thus can be handled by one stub
3642 section. (or the tail section is itself larger than
3643 stub_group_size bytes, in which case we may be toast.)
3644 We should really be keeping track of the total size of
3645 stubs added here, as stubs contribute to the final output
3646 section size. */
3647 do
3648 {
3649 prev = PREV_SEC (tail);
3650 /* Set up this stub group. */
3651 htab->stub_group[tail->id].link_sec = curr;
3652 }
3653 while (tail != curr && (tail = prev) != NULL);
3654
3655 /* But wait, there's more! Input sections up to stub_group_size
3656 bytes before the stub section can be handled by it too.
3657 Don't do this if we have a really large section after the
3658 stubs, as adding more stubs increases the chance that
3659 branches may not reach into the stub section. */
3660 if (!stubs_always_before_branch && !big_sec)
3661 {
3662 total = 0;
3663 while (prev != NULL
3664 && ((total += tail->output_offset - prev->output_offset)
3665 < stub_group_size))
3666 {
3667 tail = prev;
3668 prev = PREV_SEC (tail);
3669 htab->stub_group[tail->id].link_sec = curr;
3670 }
3671 }
3672 tail = prev;
3673 }
3674 }
3675 while (list-- != htab->input_list);
3676 free (htab->input_list);
3677#undef PREV_SEC
3678}
3679
3680/* Read in all local syms for all input bfds.
3681 Returns -1 on error, 0 otherwise. */
3682
3683static int
3684get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3685 struct bfd_link_info *info)
3686{
3687 unsigned int bfd_indx;
3688 Elf_Internal_Sym *local_syms, **all_local_syms;
3689 int stub_changed = 0;
3690 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3691
3692 /* We want to read in symbol extension records only once. To do this
3693 we need to read in the local symbols in parallel and save them for
3694 later use; so hold pointers to the local symbols in an array. */
986f0783 3695 size_t amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
a3c62988
NC		 3696 all_local_syms = bfd_zmalloc (amt);
3697 htab->all_local_syms = all_local_syms;
3698 if (all_local_syms == NULL)
3699 return -1;
3700
3701 /* Walk over all the input BFDs, swapping in local symbols. */
3702 for (bfd_indx = 0;
3703 input_bfd != NULL;
c72f2fb2 3704 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3705 {
3706 Elf_Internal_Shdr *symtab_hdr;
3707
3708 /* We'll need the symbol table in a second. */
3709 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3710 if (symtab_hdr->sh_info == 0)
3711 continue;
3712
3713 /* We need an array of the local symbols attached to the input bfd. */
3714 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3715 if (local_syms == NULL)
3716 {
3717 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3718 symtab_hdr->sh_info, 0,
3719 NULL, NULL, NULL);
3720 /* Cache them for elf_link_input_bfd. */
3721 symtab_hdr->contents = (unsigned char *) local_syms;
3722 }
3723 if (local_syms == NULL)
3724 return -1;
3725
3726 all_local_syms[bfd_indx] = local_syms;
3727 }
3728
3729 return stub_changed;
3730}
3731
3732/* Determine and set the size of the stub section for a final link.
3733
3734The basic idea here is to examine all the relocations looking for
3735PC-relative calls to a target that is unreachable with a "CALLR"
3736instruction. */
3737
3738/* See elf32-hppa.c and elf64-ppc.c. */
3739
3740bfd_boolean
3741elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3742 struct bfd_link_info *info,
3743 bfd_signed_vma group_size,
3744 asection * (*add_stub_section) (const char *, asection *),
3745 void (*layout_sections_again) (void))
3746{
3747 bfd_size_type stub_group_size;
3748 bfd_boolean stubs_always_before_branch;
3749 bfd_boolean stub_changed;
3750 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3751
3752 /* Stash our params away. */
3753 htab->stub_bfd = stub_bfd;
3754 htab->add_stub_section = add_stub_section;
3755 htab->layout_sections_again = layout_sections_again;
3756 stubs_always_before_branch = group_size < 0;
3757 if (group_size < 0)
3758 stub_group_size = -group_size;
3759 else
3760 stub_group_size = group_size;
3761 if (stub_group_size == 1)
3762 {
3763 /* Default values. */
3764 /* FIXME: not sure what these values should be */
3765 if (stubs_always_before_branch)
3766 {
3767 stub_group_size = (1 << BRANCH_BITS);
3768 }
3769 else
3770 {
3771 stub_group_size = (1 << BRANCH_BITS);
3772 }
3773 }
3774
3775 group_sections (htab, stub_group_size, stubs_always_before_branch);
3776
3777 switch (get_local_syms (output_bfd, info->input_bfds, info))
3778 {
3779 default:
3780 if (htab->all_local_syms)
3781 goto error_ret_free_local;
3782 return FALSE;
3783
3784 case 0:
3785 stub_changed = FALSE;
3786 break;
3787
3788 case 1:
3789 stub_changed = TRUE;
3790 break;
3791 }
3792
3793 while (1)
3794 {
3795 bfd *input_bfd;
3796 unsigned int bfd_indx;
3797 asection *stub_sec;
3798
3799 for (input_bfd = info->input_bfds, bfd_indx = 0;
3800 input_bfd != NULL;
c72f2fb2 3801 input_bfd = input_bfd->link.next, bfd_indx++)
a3c62988
NC		 3802 {
3803 Elf_Internal_Shdr *symtab_hdr;
3804 asection *section;
3805 Elf_Internal_Sym *local_syms;
3806
3807 /* We'll need the symbol table in a second. */
3808 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3809 if (symtab_hdr->sh_info == 0)
3810 continue;
3811
3812 local_syms = htab->all_local_syms[bfd_indx];
3813
3814 /* Walk over each section attached to the input bfd. */
3815 for (section = input_bfd->sections;
3816 section != NULL;
3817 section = section->next)
3818 {
3819 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3820
3821 /* If there aren't any relocs, then there's nothing more
3822 to do. */
3823 if ((section->flags & SEC_RELOC) == 0
3824 || section->reloc_count == 0)
3825 continue;
3826
3827 /* If this section is a link-once section that will be
3828 discarded, then don't create any stubs. */
3829 if (section->output_section == NULL
3830 || section->output_section->owner != output_bfd)
3831 continue;
3832
3833 /* Get the relocs. */
3834 internal_relocs
3835 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
3836 info->keep_memory);
3837 if (internal_relocs == NULL)
3838 goto error_ret_free_local;
3839
3840 /* Now examine each relocation. */
3841 irela = internal_relocs;
3842 irelaend = irela + section->reloc_count;
3843 for (; irela < irelaend; irela++)
3844 {
3845 unsigned int r_type, r_indx;
3846 enum elf_metag_stub_type stub_type;
3847 struct elf_metag_stub_hash_entry *hsh;
3848 asection *sym_sec;
3849 bfd_vma sym_value;
3850 bfd_vma destination;
3851 struct elf_metag_link_hash_entry *hh;
3852 char *stub_name;
3853 const asection *id_sec;
3854
3855 r_type = ELF32_R_TYPE (irela->r_info);
3856 r_indx = ELF32_R_SYM (irela->r_info);
3857
3858 if (r_type >= (unsigned int) R_METAG_MAX)
3859 {
3860 bfd_set_error (bfd_error_bad_value);
3861 error_ret_free_internal:
3862 if (elf_section_data (section)->relocs == NULL)
3863 free (internal_relocs);
3864 goto error_ret_free_local;
3865 }
3866
3867 /* Only look for stubs on CALLR and B instructions. */
3868 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
3869 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
3870 continue;
3871
3872 /* Now determine the call target, its name, value,
3873 section. */
3874 sym_sec = NULL;
3875 sym_value = 0;
3876 destination = 0;
3877 hh = NULL;
3878 if (r_indx < symtab_hdr->sh_info)
3879 {
3880 /* It's a local symbol. */
3881 Elf_Internal_Sym *sym;
3882 Elf_Internal_Shdr *hdr;
3883 unsigned int shndx;
3884
3885 sym = local_syms + r_indx;
3886 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3887 sym_value = sym->st_value;
3888 shndx = sym->st_shndx;
3889 if (shndx < elf_numsections (input_bfd))
3890 {
3891 hdr = elf_elfsections (input_bfd)[shndx];
3892 sym_sec = hdr->bfd_section;
3893 destination = (sym_value + irela->r_addend
3894 + sym_sec->output_offset
3895 + sym_sec->output_section->vma);
3896 }
3897 }
3898 else
3899 {
3900 /* It's an external symbol. */
3901 int e_indx;
3902
3903 e_indx = r_indx - symtab_hdr->sh_info;
3904 hh = ((struct elf_metag_link_hash_entry *)
3905 elf_sym_hashes (input_bfd)[e_indx]);
3906
3907 while (hh->eh.root.type == bfd_link_hash_indirect
3908 || hh->eh.root.type == bfd_link_hash_warning)
3909 hh = ((struct elf_metag_link_hash_entry *)
3910 hh->eh.root.u.i.link);
3911
3912 if (hh->eh.root.type == bfd_link_hash_defined
3913 || hh->eh.root.type == bfd_link_hash_defweak)
3914 {
3915 sym_sec = hh->eh.root.u.def.section;
3916 sym_value = hh->eh.root.u.def.value;
3917 if (hh->eh.plt.offset != (bfd_vma) -1
3918 && hh->eh.dynindx != -1
3919 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
3920 {
ce558b89 3921 sym_sec = htab->etab.splt;
a3c62988
NC		 3922 sym_value = hh->eh.plt.offset;
3923 }
3924
3925 if (sym_sec->output_section != NULL)
3926 destination = (sym_value + irela->r_addend
3927 + sym_sec->output_offset
3928 + sym_sec->output_section->vma);
3929 else
3930 continue;
3931 }
3932 else if (hh->eh.root.type == bfd_link_hash_undefweak)
3933 {
0e1862bb 3934 if (! bfd_link_pic (info))
a3c62988
NC		 3935 continue;
3936 }
3937 else if (hh->eh.root.type == bfd_link_hash_undefined)
3938 {
3939 if (! (info->unresolved_syms_in_objects == RM_IGNORE
3940 && (ELF_ST_VISIBILITY (hh->eh.other)
3941 == STV_DEFAULT)))
3942 continue;
3943 }
3944 else
3945 {
3946 bfd_set_error (bfd_error_bad_value);
3947 goto error_ret_free_internal;
3948 }
3949 }
3950
3951 /* Determine what (if any) linker stub is needed. */
3952 stub_type = metag_type_of_stub (section, irela, hh,
3953 destination, info);
3954 if (stub_type == metag_stub_none)
3955 continue;
3956
3957 /* Support for grouping stub sections. */
3958 id_sec = htab->stub_group[section->id].link_sec;
3959
3960 /* Get the name of this stub. */
3961 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
3962 if (!stub_name)
3963 goto error_ret_free_internal;
3964
3965 hsh = metag_stub_hash_lookup (&htab->bstab,
3966 stub_name,
3967 FALSE, FALSE);
3968 if (hsh != NULL)
3969 {
3970 /* The proper stub has already been created. */
3971 free (stub_name);
3972 continue;
3973 }
3974
3975 hsh = metag_add_stub (stub_name, section, htab);
3976 if (hsh == NULL)
3977 {
3978 free (stub_name);
3979 goto error_ret_free_internal;
3980 }
3981 hsh->target_value = sym_value;
3982 hsh->target_section = sym_sec;
3983 hsh->stub_type = stub_type;
3984 hsh->hh = hh;
3985 hsh->addend = irela->r_addend;
3986 stub_changed = TRUE;
3987 }
3988
3989 /* We're done with the internal relocs, free them. */
3990 if (elf_section_data (section)->relocs == NULL)
3991 free (internal_relocs);
3992 }
3993 }
3994
3995 if (!stub_changed)
3996 break;
3997
3998 /* OK, we've added some stubs. Find out the new size of the
3999 stub sections. */
4000 for (stub_sec = htab->stub_bfd->sections;
4001 stub_sec != NULL;
4002 stub_sec = stub_sec->next)
4003 stub_sec->size = 0;
4004
4005 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4006
4007 /* Ask the linker to do its stuff. */
4008 (*htab->layout_sections_again) ();
4009 stub_changed = FALSE;
4010 }
4011
4012 free (htab->all_local_syms);
4013 return TRUE;
4014
4015 error_ret_free_local:
4016 free (htab->all_local_syms);
4017 return FALSE;
4018}
4019
4020/* Build all the stubs associated with the current output file. The
4021 stubs are kept in a hash table attached to the main linker hash
4022 table. This function is called via metagelf_finish in the linker. */
4023
4024bfd_boolean
4025elf_metag_build_stubs (struct bfd_link_info *info)
4026{
4027 asection *stub_sec;
4028 struct bfd_hash_table *table;
4029 struct elf_metag_link_hash_table *htab;
4030
4031 htab = metag_link_hash_table (info);
4032
4033 for (stub_sec = htab->stub_bfd->sections;
4034 stub_sec != NULL;
4035 stub_sec = stub_sec->next)
4036 {
4037 bfd_size_type size;
4038
4039 /* Allocate memory to hold the linker stubs. */
4040 size = stub_sec->size;
4041 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4042 if (stub_sec->contents == NULL && size != 0)
4043 return FALSE;
4044 stub_sec->size = 0;
4045 }
4046
4047 /* Build the stubs as directed by the stub hash table. */
4048 table = &htab->bstab;
4049 bfd_hash_traverse (table, metag_build_one_stub, info);
4050
4051 return TRUE;
4052}
4053
4054/* Return TRUE if SYM represents a local label symbol. */
4055
4056static bfd_boolean
4057elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4058{
4059 if (name[0] == '$' && name[1] == 'L')
4060 return 1;
4061 return _bfd_elf_is_local_label_name (abfd, name);
4062}
4063
4064/* Return address for Ith PLT stub in section PLT, for relocation REL
4065 or (bfd_vma) -1 if it should not be included. */
4066
4067static bfd_vma
4068elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4069 const arelent *rel ATTRIBUTE_UNUSED)
4070{
4071 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4072}
4073
4074#define ELF_ARCH bfd_arch_metag
4075#define ELF_TARGET_ID METAG_ELF_DATA
4076#define ELF_MACHINE_CODE EM_METAG
4077#define ELF_MINPAGESIZE 0x1000
4078#define ELF_MAXPAGESIZE 0x4000
4079#define ELF_COMMONPAGESIZE 0x1000
4080
6d00b590 4081#define TARGET_LITTLE_SYM metag_elf32_vec
a3c62988
NC		 4082#define TARGET_LITTLE_NAME "elf32-metag"
4083
4084#define elf_symbol_leading_char '_'
4085
4086#define elf_info_to_howto_rel NULL
4087#define elf_info_to_howto metag_info_to_howto_rela
4088
4089#define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4090#define bfd_elf32_bfd_link_hash_table_create \
4091 elf_metag_link_hash_table_create
a3c62988
NC		 4092#define elf_backend_relocate_section elf_metag_relocate_section
4093#define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
a3c62988
NC		 4094#define elf_backend_check_relocs elf_metag_check_relocs
4095#define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4096#define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4097#define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4098#define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4099#define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4100#define elf_backend_omit_section_dynsym \
d00dd7dc 4101 _bfd_elf_omit_section_dynsym_all
ed7e9d0b 4102#define elf_backend_init_file_header elf_metag_init_file_header
a3c62988
NC		 4103#define elf_backend_reloc_type_class elf_metag_reloc_type_class
4104#define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4105#define elf_backend_plt_sym_val elf_metag_plt_sym_val
4106
4107#define elf_backend_can_gc_sections 1
4108#define elf_backend_can_refcount 1
ce558b89
AM		 4109#define elf_backend_rela_normal 1
4110#define elf_backend_want_got_plt 1
a3c62988
NC		 4111#define elf_backend_want_got_sym 0
4112#define elf_backend_want_plt_sym 0
4113#define elf_backend_plt_readonly 1
64f52338 4114#define elf_backend_dtrel_excludes_plt 1
5474d94f 4115#define elf_backend_want_dynrelro 1
a3c62988
NC		 4116
4117#define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4118#define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4119
4120#include "elf32-target.h"
GDB Binutils - Deliverables
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