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Rename u.weakdef and make it a circular list
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2017 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
28
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32 /* ABI version:
33 0 - original
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
36
37 static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46 static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55 static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64 static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95 static reloc_howto_type elf_metag_howto_table[] =
96 {
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 };
682
683 #define BRANCH_BITS 19
684
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
695
696 struct metag_reloc_map
697 {
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700 };
701
702 static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746 enum elf_metag_stub_type
747 {
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751 };
752
753 struct elf_metag_stub_hash_entry
754 {
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780 };
781
782 struct elf_metag_link_hash_entry
783 {
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811 };
812
813 struct elf_metag_link_hash_table
814 {
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 unsigned int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Small local sym cache. */
846 struct sym_cache sym_cache;
847
848 /* Data for LDM relocations. */
849 union
850 {
851 bfd_signed_vma refcount;
852 bfd_vma offset;
853 } tls_ldm_got;
854 };
855
856 /* Return the base vma address which should be subtracted from the
857 real address when resolving a dtpoff relocation. This is PT_TLS
858 segment p_vaddr. */
859 static bfd_vma
860 dtpoff_base (struct bfd_link_info *info)
861 {
862 /* If tls_sec is NULL, we should have signalled an error already. */
863 if (elf_hash_table (info)->tls_sec == NULL)
864 return 0;
865 return elf_hash_table (info)->tls_sec->vma;
866 }
867
868 /* Return the relocation value for R_METAG_TLS_IE */
869 static bfd_vma
870 tpoff (struct bfd_link_info *info, bfd_vma address)
871 {
872 /* If tls_sec is NULL, we should have signalled an error already. */
873 if (elf_hash_table (info)->tls_sec == NULL)
874 return 0;
875 /* METAG TLS ABI is variant I and static TLS blocks start just after
876 tcbhead structure which has 2 pointer fields. */
877 return (address - elf_hash_table (info)->tls_sec->vma
878 + align_power ((bfd_vma) 8,
879 elf_hash_table (info)->tls_sec->alignment_power));
880 }
881
882 static void
883 metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
884 arelent *cache_ptr,
885 Elf_Internal_Rela *dst)
886 {
887 unsigned int r_type;
888
889 r_type = ELF32_R_TYPE (dst->r_info);
890 if (r_type >= (unsigned int) R_METAG_MAX)
891 {
892 /* xgettext:c-format */
893 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
894 r_type = 0;
895 }
896 cache_ptr->howto = & elf_metag_howto_table [r_type];
897 }
898
899 static reloc_howto_type *
900 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
901 bfd_reloc_code_real_type code)
902 {
903 unsigned int i;
904
905 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
906 if (metag_reloc_map [i].bfd_reloc_val == code)
907 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
908
909 return NULL;
910 }
911
912 static reloc_howto_type *
913 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
914 const char *r_name)
915 {
916 unsigned int i;
917
918 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
919 if (elf_metag_howto_table[i].name != NULL
920 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
921 return &elf_metag_howto_table[i];
922
923 return NULL;
924 }
925
926 /* Various hash macros and functions. */
927 #define metag_link_hash_table(p) \
928 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
929 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
930
931 #define metag_elf_hash_entry(ent) \
932 ((struct elf_metag_link_hash_entry *)(ent))
933
934 #define metag_stub_hash_entry(ent) \
935 ((struct elf_metag_stub_hash_entry *)(ent))
936
937 #define metag_stub_hash_lookup(table, string, create, copy) \
938 ((struct elf_metag_stub_hash_entry *) \
939 bfd_hash_lookup ((table), (string), (create), (copy)))
940
941 #define metag_elf_local_got_tls_type(abfd) \
942 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
943
944 /* Assorted hash table functions. */
945
946 /* Initialize an entry in the stub hash table. */
947
948 static struct bfd_hash_entry *
949 stub_hash_newfunc (struct bfd_hash_entry *entry,
950 struct bfd_hash_table *table,
951 const char *string)
952 {
953 /* Allocate the structure if it has not already been allocated by a
954 subclass. */
955 if (entry == NULL)
956 {
957 entry = bfd_hash_allocate (table,
958 sizeof (struct elf_metag_stub_hash_entry));
959 if (entry == NULL)
960 return entry;
961 }
962
963 /* Call the allocation method of the superclass. */
964 entry = bfd_hash_newfunc (entry, table, string);
965 if (entry != NULL)
966 {
967 struct elf_metag_stub_hash_entry *hsh;
968
969 /* Initialize the local fields. */
970 hsh = (struct elf_metag_stub_hash_entry *) entry;
971 hsh->stub_sec = NULL;
972 hsh->stub_offset = 0;
973 hsh->target_value = 0;
974 hsh->target_section = NULL;
975 hsh->stub_type = metag_stub_long_branch;
976 hsh->hh = NULL;
977 hsh->id_sec = NULL;
978 }
979
980 return entry;
981 }
982
983 /* Initialize an entry in the link hash table. */
984
985 static struct bfd_hash_entry *
986 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
987 struct bfd_hash_table *table,
988 const char *string)
989 {
990 /* Allocate the structure if it has not already been allocated by a
991 subclass. */
992 if (entry == NULL)
993 {
994 entry = bfd_hash_allocate (table,
995 sizeof (struct elf_metag_link_hash_entry));
996 if (entry == NULL)
997 return entry;
998 }
999
1000 /* Call the allocation method of the superclass. */
1001 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1002 if (entry != NULL)
1003 {
1004 struct elf_metag_link_hash_entry *hh;
1005
1006 /* Initialize the local fields. */
1007 hh = (struct elf_metag_link_hash_entry *) entry;
1008 hh->hsh_cache = NULL;
1009 hh->dyn_relocs = NULL;
1010 hh->tls_type = GOT_UNKNOWN;
1011 }
1012
1013 return entry;
1014 }
1015
1016 /* Free the derived linker hash table. */
1017
1018 static void
1019 elf_metag_link_hash_table_free (bfd *obfd)
1020 {
1021 struct elf_metag_link_hash_table *htab
1022 = (struct elf_metag_link_hash_table *) obfd->link.hash;
1023
1024 bfd_hash_table_free (&htab->bstab);
1025 _bfd_elf_link_hash_table_free (obfd);
1026 }
1027
1028 /* Create the derived linker hash table. The Meta ELF port uses the derived
1029 hash table to keep information specific to the Meta ELF linker (without
1030 using static variables). */
1031
1032 static struct bfd_link_hash_table *
1033 elf_metag_link_hash_table_create (bfd *abfd)
1034 {
1035 struct elf_metag_link_hash_table *htab;
1036 bfd_size_type amt = sizeof (*htab);
1037
1038 htab = bfd_zmalloc (amt);
1039 if (htab == NULL)
1040 return NULL;
1041
1042 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1043 metag_link_hash_newfunc,
1044 sizeof (struct elf_metag_link_hash_entry),
1045 METAG_ELF_DATA))
1046 {
1047 free (htab);
1048 return NULL;
1049 }
1050
1051 /* Init the stub hash table too. */
1052 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1053 sizeof (struct elf_metag_stub_hash_entry)))
1054 {
1055 _bfd_elf_link_hash_table_free (abfd);
1056 return NULL;
1057 }
1058 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
1059
1060 return &htab->etab.root;
1061 }
1062
1063 /* Section name for stubs is the associated section name plus this
1064 string. */
1065 #define STUB_SUFFIX ".stub"
1066
1067 /* Build a name for an entry in the stub hash table. */
1068
1069 static char *
1070 metag_stub_name (const asection *input_section,
1071 const asection *sym_sec,
1072 const struct elf_metag_link_hash_entry *hh,
1073 const Elf_Internal_Rela *rel)
1074 {
1075 char *stub_name;
1076 bfd_size_type len;
1077
1078 if (hh)
1079 {
1080 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1081 stub_name = bfd_malloc (len);
1082 if (stub_name != NULL)
1083 {
1084 sprintf (stub_name, "%08x_%s+%x",
1085 input_section->id & 0xffffffff,
1086 hh->eh.root.root.string,
1087 (int) rel->r_addend & 0xffffffff);
1088 }
1089 }
1090 else
1091 {
1092 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1093 stub_name = bfd_malloc (len);
1094 if (stub_name != NULL)
1095 {
1096 sprintf (stub_name, "%08x_%x:%x+%x",
1097 input_section->id & 0xffffffff,
1098 sym_sec->id & 0xffffffff,
1099 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1100 (int) rel->r_addend & 0xffffffff);
1101 }
1102 }
1103 return stub_name;
1104 }
1105
1106 /* Look up an entry in the stub hash. Stub entries are cached because
1107 creating the stub name takes a bit of time. */
1108
1109 static struct elf_metag_stub_hash_entry *
1110 metag_get_stub_entry (const asection *input_section,
1111 const asection *sym_sec,
1112 struct elf_metag_link_hash_entry *hh,
1113 const Elf_Internal_Rela *rel,
1114 struct elf_metag_link_hash_table *htab)
1115 {
1116 struct elf_metag_stub_hash_entry *hsh;
1117 const asection *id_sec;
1118
1119 /* If this input section is part of a group of sections sharing one
1120 stub section, then use the id of the first section in the group.
1121 Stub names need to include a section id, as there may well be
1122 more than one stub used to reach say, printf, and we need to
1123 distinguish between them. */
1124 id_sec = htab->stub_group[input_section->id].link_sec;
1125
1126 if (hh != NULL && hh->hsh_cache != NULL
1127 && hh->hsh_cache->hh == hh
1128 && hh->hsh_cache->id_sec == id_sec)
1129 {
1130 hsh = hh->hsh_cache;
1131 }
1132 else
1133 {
1134 char *stub_name;
1135
1136 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1137 if (stub_name == NULL)
1138 return NULL;
1139
1140 hsh = metag_stub_hash_lookup (&htab->bstab,
1141 stub_name, FALSE, FALSE);
1142
1143 if (hh != NULL)
1144 hh->hsh_cache = hsh;
1145
1146 free (stub_name);
1147 }
1148
1149 return hsh;
1150 }
1151
1152 /* Add a new stub entry to the stub hash. Not all fields of the new
1153 stub entry are initialised. */
1154
1155 static struct elf_metag_stub_hash_entry *
1156 metag_add_stub (const char *stub_name,
1157 asection *section,
1158 struct elf_metag_link_hash_table *htab)
1159 {
1160 asection *link_sec;
1161 asection *stub_sec;
1162 struct elf_metag_stub_hash_entry *hsh;
1163
1164 link_sec = htab->stub_group[section->id].link_sec;
1165 stub_sec = htab->stub_group[section->id].stub_sec;
1166 if (stub_sec == NULL)
1167 {
1168 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1169 if (stub_sec == NULL)
1170 {
1171 size_t namelen;
1172 bfd_size_type len;
1173 char *s_name;
1174
1175 namelen = strlen (link_sec->name);
1176 len = namelen + sizeof (STUB_SUFFIX);
1177 s_name = bfd_alloc (htab->stub_bfd, len);
1178 if (s_name == NULL)
1179 return NULL;
1180
1181 memcpy (s_name, link_sec->name, namelen);
1182 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1183
1184 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1185 if (stub_sec == NULL)
1186 return NULL;
1187 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1188 }
1189 htab->stub_group[section->id].stub_sec = stub_sec;
1190 }
1191
1192 /* Enter this entry into the linker stub hash table. */
1193 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1194 TRUE, FALSE);
1195 if (hsh == NULL)
1196 {
1197 /* xgettext:c-format */
1198 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1199 section->owner, stub_name);
1200 return NULL;
1201 }
1202
1203 hsh->stub_sec = stub_sec;
1204 hsh->stub_offset = 0;
1205 hsh->id_sec = link_sec;
1206 return hsh;
1207 }
1208
1209 /* Check a signed integer value can be represented in the given number
1210 of bits. */
1211
1212 static bfd_boolean
1213 within_signed_range (int value, unsigned int bits)
1214 {
1215 int min_val = -(1 << (bits - 1));
1216 int max_val = (1 << (bits - 1)) - 1;
1217 return (value <= max_val) && (value >= min_val);
1218 }
1219
1220 /* Perform a relocation as part of a final link. */
1221
1222 static bfd_reloc_status_type
1223 metag_final_link_relocate (reloc_howto_type *howto,
1224 bfd *input_bfd,
1225 asection *input_section,
1226 bfd_byte *contents,
1227 Elf_Internal_Rela *rel,
1228 bfd_vma relocation,
1229 struct elf_metag_link_hash_entry *hh,
1230 struct elf_metag_link_hash_table *htab,
1231 asection *sym_sec)
1232 {
1233 bfd_reloc_status_type r = bfd_reloc_ok;
1234 bfd_byte *hit_data = contents + rel->r_offset;
1235 int opcode, op_shift, op_extended, l1, l2;
1236 bfd_signed_vma srel, addend = rel->r_addend;
1237 struct elf_metag_stub_hash_entry *hsh = NULL;
1238 bfd_vma location;
1239
1240 /* Find out where we are and where we're going. */
1241 location = (rel->r_offset +
1242 input_section->output_offset +
1243 input_section->output_section->vma);
1244
1245 switch (howto->type)
1246 {
1247 case R_METAG_RELBRANCH:
1248 case R_METAG_RELBRANCH_PLT:
1249 /* Make it a pc relative offset. */
1250 relocation -= location;
1251 break;
1252 case R_METAG_TLS_GD:
1253 case R_METAG_TLS_IE:
1254 relocation -= elf_gp (input_section->output_section->owner);
1255 break;
1256 default:
1257 break;
1258 }
1259
1260 switch (howto->type)
1261 {
1262 case R_METAG_RELBRANCH_PLT:
1263 case R_METAG_RELBRANCH:
1264 opcode = bfd_get_32 (input_bfd, hit_data);
1265
1266 srel = (bfd_signed_vma) relocation;
1267 srel += addend;
1268
1269 /* If the branch is out of reach, then redirect the
1270 call to the local stub for this function. */
1271 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1272 (srel < - (1 << (BRANCH_BITS + 1))))
1273 {
1274 if (sym_sec == NULL)
1275 break;
1276
1277 hsh = metag_get_stub_entry (input_section, sym_sec,
1278 hh, rel, htab);
1279 if (hsh == NULL)
1280 return bfd_reloc_undefined;
1281
1282 /* Munge up the value and addend so that we call the stub
1283 rather than the procedure directly. */
1284 srel = (hsh->stub_offset
1285 + hsh->stub_sec->output_offset
1286 + hsh->stub_sec->output_section->vma);
1287 srel -= location;
1288 }
1289
1290 srel = srel >> 2;
1291
1292 if (!within_signed_range (srel, BRANCH_BITS))
1293 {
1294 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1295 srel = 0;
1296 else
1297 return bfd_reloc_overflow;
1298 }
1299
1300 opcode &= ~(0x7ffff << 5);
1301 opcode |= ((srel & 0x7ffff) << 5);
1302
1303 bfd_put_32 (input_bfd, opcode, hit_data);
1304 break;
1305 case R_METAG_GETSETOFF:
1306 case R_METAG_GETSET_GOT:
1307 case R_METAG_GETSET_GOTOFF:
1308 opcode = bfd_get_32 (input_bfd, hit_data);
1309
1310 srel = (bfd_signed_vma) relocation;
1311 srel += addend;
1312
1313 /* Is this a standard or extended GET/SET? */
1314 if ((opcode & 0xf0000000) == 0xa0000000)
1315 {
1316 /* Extended GET/SET. */
1317 l1 = opcode & 0x2;
1318 l2 = opcode & 0x4;
1319 op_extended = 1;
1320 }
1321 else
1322 {
1323 /* Standard GET/SET. */
1324 l1 = opcode & 0x01000000;
1325 l2 = opcode & 0x04000000;
1326 op_extended = 0;
1327 }
1328
1329 /* Calculate the width of the GET/SET and how much we need to
1330 shift the result by. */
1331 if (l2)
1332 if (l1)
1333 op_shift = 3;
1334 else
1335 op_shift = 2;
1336 else
1337 if (l1)
1338 op_shift = 1;
1339 else
1340 op_shift = 0;
1341
1342 /* GET/SET offsets are scaled by the width of the transfer. */
1343 srel = srel >> op_shift;
1344
1345 /* Extended GET/SET has signed 12 bits of offset, standard has
1346 signed 6 bits. */
1347 if (op_extended)
1348 {
1349 if (!within_signed_range (srel, 12))
1350 {
1351 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1352 srel = 0;
1353 else
1354 return bfd_reloc_overflow;
1355 }
1356 opcode &= ~(0xfff << 7);
1357 opcode |= ((srel & 0xfff) << 7);
1358 }
1359 else
1360 {
1361 if (!within_signed_range (srel, 5))
1362 {
1363 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1364 srel = 0;
1365 else
1366 return bfd_reloc_overflow;
1367 }
1368 opcode &= ~(0x3f << 8);
1369 opcode |= ((srel & 0x3f) << 8);
1370 }
1371
1372 bfd_put_32 (input_bfd, opcode, hit_data);
1373 break;
1374 case R_METAG_TLS_GD:
1375 case R_METAG_TLS_LDM:
1376 opcode = bfd_get_32 (input_bfd, hit_data);
1377
1378 if ((bfd_signed_vma)relocation < 0)
1379 {
1380 /* sign extend immediate */
1381 if ((opcode & 0xf2000001) == 0x02000000)
1382 {
1383 /* ADD De.e,Dx.r,#I16 */
1384 /* set SE bit */
1385 opcode |= (1 << 1);
1386 } else
1387 return bfd_reloc_overflow;
1388 }
1389
1390 bfd_put_32 (input_bfd, opcode, hit_data);
1391
1392 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1393 contents, rel->r_offset,
1394 relocation, rel->r_addend);
1395 break;
1396 default:
1397 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1398 contents, rel->r_offset,
1399 relocation, rel->r_addend);
1400 }
1401
1402 return r;
1403 }
1404
1405 /* This is defined because R_METAG_NONE != 0...
1406 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1407 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1408 rel, relend, howto, contents) \
1409 { \
1410 _bfd_clear_contents (howto, input_bfd, input_section, \
1411 contents + rel->r_offset); \
1412 \
1413 if (bfd_link_relocatable (info) \
1414 && (input_section->flags & SEC_DEBUGGING)) \
1415 { \
1416 /* Only remove relocations in debug sections since other \
1417 sections may require relocations. */ \
1418 Elf_Internal_Shdr *rel_hdr; \
1419 \
1420 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1421 \
1422 /* Avoid empty output section. */ \
1423 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1424 { \
1425 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1426 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1427 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1428 \
1429 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1430 \
1431 input_section->reloc_count--; \
1432 relend--; \
1433 rel--; \
1434 continue; \
1435 } \
1436 } \
1437 \
1438 rel->r_info = R_METAG_NONE; \
1439 rel->r_addend = 0; \
1440 continue; \
1441 }
1442
1443 /* Relocate a META ELF section.
1444
1445 The RELOCATE_SECTION function is called by the new ELF backend linker
1446 to handle the relocations for a section.
1447
1448 The relocs are always passed as Rela structures; if the section
1449 actually uses Rel structures, the r_addend field will always be
1450 zero.
1451
1452 This function is responsible for adjusting the section contents as
1453 necessary, and (if using Rela relocs and generating a relocatable
1454 output file) adjusting the reloc addend as necessary.
1455
1456 This function does not have to worry about setting the reloc
1457 address or the reloc symbol index.
1458
1459 LOCAL_SYMS is a pointer to the swapped in local symbols.
1460
1461 LOCAL_SECTIONS is an array giving the section in the input file
1462 corresponding to the st_shndx field of each local symbol.
1463
1464 The global hash table entry for the global symbols can be found
1465 via elf_sym_hashes (input_bfd).
1466
1467 When generating relocatable output, this function must handle
1468 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1469 going to be the section symbol corresponding to the output
1470 section, which means that the addend must be adjusted
1471 accordingly. */
1472
1473 static bfd_boolean
1474 elf_metag_relocate_section (bfd *output_bfd,
1475 struct bfd_link_info *info,
1476 bfd *input_bfd,
1477 asection *input_section,
1478 bfd_byte *contents,
1479 Elf_Internal_Rela *relocs,
1480 Elf_Internal_Sym *local_syms,
1481 asection **local_sections)
1482 {
1483 bfd_vma *local_got_offsets;
1484 Elf_Internal_Shdr *symtab_hdr;
1485 struct elf_link_hash_entry **eh_syms;
1486 struct elf_metag_link_hash_table *htab;
1487 Elf_Internal_Rela *rel;
1488 Elf_Internal_Rela *relend;
1489 asection *sreloc;
1490
1491 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1492 eh_syms = elf_sym_hashes (input_bfd);
1493 relend = relocs + input_section->reloc_count;
1494
1495 htab = metag_link_hash_table (info);
1496 local_got_offsets = elf_local_got_offsets (input_bfd);
1497
1498 sreloc = NULL;
1499
1500 for (rel = relocs; rel < relend; rel ++)
1501 {
1502 reloc_howto_type *howto;
1503 unsigned long r_symndx;
1504 Elf_Internal_Sym *sym;
1505 asection *sec;
1506 struct elf_metag_link_hash_entry *hh;
1507 bfd_vma relocation;
1508 bfd_reloc_status_type r;
1509 const char *name;
1510 int r_type;
1511
1512 r_type = ELF32_R_TYPE (rel->r_info);
1513
1514 if (r_type == R_METAG_GNU_VTINHERIT
1515 || r_type == R_METAG_GNU_VTENTRY
1516 || r_type == R_METAG_NONE)
1517 continue;
1518
1519 r_symndx = ELF32_R_SYM (rel->r_info);
1520
1521 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1522 hh = NULL;
1523 sym = NULL;
1524 sec = NULL;
1525
1526 if (r_symndx < symtab_hdr->sh_info)
1527 {
1528 sym = local_syms + r_symndx;
1529 sec = local_sections [r_symndx];
1530 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1531
1532 name = bfd_elf_string_from_elf_section
1533 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1534 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1535 }
1536 else
1537 {
1538 struct elf_link_hash_entry *eh;
1539 bfd_boolean unresolved_reloc, warned, ignored;
1540
1541 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1542 r_symndx, symtab_hdr, eh_syms,
1543 eh, sec, relocation,
1544 unresolved_reloc, warned, ignored);
1545
1546 name = eh->root.root.string;
1547 hh = (struct elf_metag_link_hash_entry *) eh;
1548 }
1549
1550 if (sec != NULL && discarded_section (sec))
1551 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1552 rel, relend, howto, contents);
1553
1554 if (bfd_link_relocatable (info))
1555 continue;
1556
1557 switch (r_type)
1558 {
1559 case R_METAG_ADDR32:
1560 case R_METAG_RELBRANCH:
1561 if ((input_section->flags & SEC_ALLOC) == 0)
1562 break;
1563
1564 if ((bfd_link_pic (info)
1565 && r_symndx != STN_UNDEF
1566 && (input_section->flags & SEC_ALLOC) != 0
1567 && (r_type != R_METAG_RELBRANCH
1568 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1569 || (!bfd_link_pic (info)
1570 && hh != NULL
1571 && hh->eh.dynindx != -1
1572 && !hh->eh.non_got_ref
1573 && ((hh->eh.def_dynamic
1574 && !hh->eh.def_regular)
1575 || hh->eh.root.type == bfd_link_hash_undefweak
1576 || hh->eh.root.type == bfd_link_hash_undefined)))
1577 {
1578 Elf_Internal_Rela outrel;
1579 bfd_boolean skip, relocate;
1580 bfd_byte *loc;
1581
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1584 time. */
1585
1586 sreloc = elf_section_data (input_section)->sreloc;
1587 BFD_ASSERT (sreloc != NULL);
1588
1589 skip = FALSE;
1590 relocate = FALSE;
1591
1592 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1593 info,
1594 input_section,
1595 rel->r_offset);
1596 if (outrel.r_offset == (bfd_vma) -1)
1597 skip = TRUE;
1598 else if (outrel.r_offset == (bfd_vma) -2)
1599 skip = TRUE, relocate = TRUE;
1600 outrel.r_offset += (input_section->output_section->vma
1601 + input_section->output_offset);
1602
1603 if (skip)
1604 {
1605 memset (&outrel, 0, sizeof outrel);
1606 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1607 }
1608 else if (r_type == R_METAG_RELBRANCH)
1609 {
1610 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1611 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1612 outrel.r_addend = rel->r_addend;
1613 }
1614 else
1615 {
1616 /* h->dynindx may be -1 if this symbol was marked to
1617 become local. */
1618 if (hh == NULL
1619 || ((info->symbolic || hh->eh.dynindx == -1)
1620 && hh->eh.def_regular))
1621 {
1622 relocate = TRUE;
1623 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1624 outrel.r_addend = relocation + rel->r_addend;
1625 }
1626 else
1627 {
1628 BFD_ASSERT (hh->eh.dynindx != -1);
1629 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1630 outrel.r_addend = rel->r_addend;
1631 }
1632 }
1633
1634 loc = sreloc->contents;
1635 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1636 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1637 ++sreloc->reloc_count;
1638
1639 /* If this reloc is against an external symbol, we do
1640 not want to fiddle with the addend. Otherwise, we
1641 need to include the symbol value so that it becomes
1642 an addend for the dynamic reloc. */
1643 if (! relocate)
1644 continue;
1645 }
1646 break;
1647
1648 case R_METAG_RELBRANCH_PLT:
1649 /* Relocation is to the entry for this symbol in the
1650 procedure linkage table. */
1651
1652 if (hh == NULL)
1653 break;
1654
1655 if (hh->eh.forced_local)
1656 break;
1657
1658 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
1659 {
1660 /* We didn't make a PLT entry for this symbol. This
1661 happens when statically linking PIC code, or when
1662 using -Bsymbolic. */
1663 break;
1664 }
1665
1666 relocation = (htab->etab.splt->output_section->vma
1667 + htab->etab.splt->output_offset
1668 + hh->eh.plt.offset);
1669 break;
1670 case R_METAG_HI16_GOTPC:
1671 case R_METAG_LO16_GOTPC:
1672 BFD_ASSERT (htab->etab.sgot != NULL);
1673
1674 relocation = (htab->etab.sgot->output_section->vma +
1675 htab->etab.sgot->output_offset);
1676 relocation += GOT_REG_OFFSET;
1677 relocation -= (input_section->output_section->vma
1678 + input_section->output_offset
1679 + rel->r_offset);
1680 break;
1681 case R_METAG_HI16_GOTOFF:
1682 case R_METAG_LO16_GOTOFF:
1683 case R_METAG_GETSET_GOTOFF:
1684 BFD_ASSERT (htab->etab.sgot != NULL);
1685
1686 relocation -= (htab->etab.sgot->output_section->vma +
1687 htab->etab.sgot->output_offset);
1688 relocation -= GOT_REG_OFFSET;
1689 break;
1690 case R_METAG_GETSET_GOT:
1691 {
1692 bfd_vma off;
1693 bfd_boolean do_got = 0;
1694
1695 /* Relocation is to the entry for this symbol in the
1696 global offset table. */
1697 if (hh != NULL)
1698 {
1699 bfd_boolean dyn;
1700
1701 off = hh->eh.got.offset;
1702 dyn = htab->etab.dynamic_sections_created;
1703 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1704 bfd_link_pic (info),
1705 &hh->eh))
1706 {
1707 /* If we aren't going to call finish_dynamic_symbol,
1708 then we need to handle initialisation of the .got
1709 entry and create needed relocs here. Since the
1710 offset must always be a multiple of 4, we use the
1711 least significant bit to record whether we have
1712 initialised it already. */
1713 if ((off & 1) != 0)
1714 off &= ~1;
1715 else
1716 {
1717 hh->eh.got.offset |= 1;
1718 do_got = 1;
1719 }
1720 }
1721 }
1722 else
1723 {
1724 /* Local symbol case. */
1725 if (local_got_offsets == NULL)
1726 abort ();
1727
1728 off = local_got_offsets[r_symndx];
1729
1730 /* The offset must always be a multiple of 4. We use
1731 the least significant bit to record whether we have
1732 already generated the necessary reloc. */
1733 if ((off & 1) != 0)
1734 off &= ~1;
1735 else
1736 {
1737 local_got_offsets[r_symndx] |= 1;
1738 do_got = 1;
1739 }
1740 }
1741
1742 if (do_got)
1743 {
1744 if (bfd_link_pic (info))
1745 {
1746 /* Output a dynamic relocation for this GOT entry.
1747 In this case it is relative to the base of the
1748 object because the symbol index is zero. */
1749 Elf_Internal_Rela outrel;
1750 bfd_byte *loc;
1751 asection *s = htab->etab.srelgot;
1752
1753 outrel.r_offset = (off
1754 + htab->etab.sgot->output_offset
1755 + htab->etab.sgot->output_section->vma);
1756 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1757 outrel.r_addend = relocation;
1758 loc = s->contents;
1759 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1760 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1761 }
1762 else
1763 bfd_put_32 (output_bfd, relocation,
1764 htab->etab.sgot->contents + off);
1765 }
1766
1767 if (off >= (bfd_vma) -2)
1768 abort ();
1769
1770 relocation = off - GOT_REG_OFFSET;
1771 }
1772 break;
1773 case R_METAG_TLS_GD:
1774 case R_METAG_TLS_IE:
1775 {
1776 /* XXXMJF There is room here for optimisations. For example
1777 converting from GD->IE, etc. */
1778 bfd_vma off;
1779 int indx;
1780 char tls_type;
1781
1782 if (htab->etab.sgot == NULL)
1783 abort();
1784
1785 indx = 0;
1786 if (hh != NULL)
1787 {
1788 bfd_boolean dyn;
1789 dyn = htab->etab.dynamic_sections_created;
1790
1791 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1792 bfd_link_pic (info),
1793 &hh->eh)
1794 && (!bfd_link_pic (info)
1795 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1796 {
1797 indx = hh->eh.dynindx;
1798 }
1799 off = hh->eh.got.offset;
1800 tls_type = hh->tls_type;
1801 }
1802 else
1803 {
1804 /* Local symbol case. */
1805 if (local_got_offsets == NULL)
1806 abort ();
1807
1808 off = local_got_offsets[r_symndx];
1809 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1810 }
1811
1812 if (tls_type == GOT_UNKNOWN)
1813 abort ();
1814
1815 if ((off & 1) != 0)
1816 off &= ~1;
1817 else
1818 {
1819 bfd_boolean need_relocs = FALSE;
1820 Elf_Internal_Rela outrel;
1821 bfd_byte *loc = NULL;
1822 int cur_off = off;
1823
1824 /* The GOT entries have not been initialized yet. Do it
1825 now, and emit any relocations. If both an IE GOT and a
1826 GD GOT are necessary, we emit the GD first. */
1827
1828 if ((bfd_link_pic (info) || indx != 0)
1829 && (hh == NULL
1830 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1831 || hh->eh.root.type != bfd_link_hash_undefweak))
1832 {
1833 need_relocs = TRUE;
1834 loc = htab->etab.srelgot->contents;
1835 /* FIXME (CAO): Should this be reloc_count++ ? */
1836 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
1837 }
1838
1839 if (tls_type & GOT_TLS_GD)
1840 {
1841 if (need_relocs)
1842 {
1843 outrel.r_offset = (cur_off
1844 + htab->etab.sgot->output_section->vma
1845 + htab->etab.sgot->output_offset);
1846 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1847 outrel.r_addend = 0;
1848 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
1849
1850 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1851 htab->etab.srelgot->reloc_count++;
1852 loc += sizeof (Elf32_External_Rela);
1853
1854 if (indx == 0)
1855 bfd_put_32 (output_bfd, 0,
1856 htab->etab.sgot->contents + cur_off + 4);
1857 else
1858 {
1859 bfd_put_32 (output_bfd, 0,
1860 htab->etab.sgot->contents + cur_off + 4);
1861 outrel.r_info = ELF32_R_INFO (indx,
1862 R_METAG_TLS_DTPOFF);
1863 outrel.r_offset += 4;
1864 bfd_elf32_swap_reloca_out (output_bfd,
1865 &outrel, loc);
1866 htab->etab.srelgot->reloc_count++;
1867 loc += sizeof (Elf32_External_Rela);
1868 }
1869 }
1870 else
1871 {
1872 /* We don't support changing the TLS model. */
1873 /* PR 20675 */
1874 if (bfd_link_pic (info))
1875 _bfd_error_handler (_("%B(%A): multiple TLS models are not supported"),
1876 input_bfd, input_section);
1877 else
1878 _bfd_error_handler (_("%B(%A): shared library symbol %s encountered whilst performing a static link"),
1879 input_bfd, input_section, name);
1880 return FALSE;
1881 }
1882
1883 cur_off += 8;
1884 }
1885
1886 if (tls_type & GOT_TLS_IE)
1887 {
1888 if (need_relocs)
1889 {
1890 outrel.r_offset = (cur_off
1891 + htab->etab.sgot->output_section->vma
1892 + htab->etab.sgot->output_offset);
1893 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1894
1895 if (indx == 0)
1896 outrel.r_addend = relocation - dtpoff_base (info);
1897 else
1898 outrel.r_addend = 0;
1899
1900 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1901 htab->etab.srelgot->reloc_count++;
1902 loc += sizeof (Elf32_External_Rela);
1903 }
1904 else
1905 bfd_put_32 (output_bfd, tpoff (info, relocation),
1906 htab->etab.sgot->contents + cur_off);
1907
1908 cur_off += 4;
1909 }
1910
1911 if (hh != NULL)
1912 hh->eh.got.offset |= 1;
1913 else
1914 local_got_offsets[r_symndx] |= 1;
1915 }
1916
1917 /* Add the base of the GOT to the relocation value. */
1918 relocation = off - GOT_REG_OFFSET;
1919
1920 break;
1921 }
1922
1923 case R_METAG_TLS_IENONPIC_HI16:
1924 case R_METAG_TLS_IENONPIC_LO16:
1925 case R_METAG_TLS_LE_HI16:
1926 case R_METAG_TLS_LE_LO16:
1927 if (bfd_link_pic (info))
1928 {
1929 _bfd_error_handler
1930 /* xgettext:c-format */
1931 (_("%B(%A+%#Lx): %s relocation not permitted in shared object"),
1932 input_bfd, input_section, rel->r_offset, howto->name);
1933 return FALSE;
1934 }
1935 else
1936 relocation = tpoff (info, relocation);
1937 break;
1938 case R_METAG_TLS_LDO_HI16:
1939 case R_METAG_TLS_LDO_LO16:
1940 if (! bfd_link_pic (info))
1941 relocation = tpoff (info, relocation);
1942 else
1943 relocation -= dtpoff_base (info);
1944 break;
1945 case R_METAG_TLS_LDM:
1946 {
1947 bfd_vma off;
1948
1949 if (htab->etab.sgot == NULL)
1950 abort();
1951 off = htab->tls_ldm_got.offset;
1952 if (off & 1)
1953 off &= ~1;
1954 else
1955 {
1956 Elf_Internal_Rela outrel;
1957 bfd_byte *loc;
1958
1959 outrel.r_offset = (off
1960 + htab->etab.sgot->output_section->vma
1961 + htab->etab.sgot->output_offset);
1962
1963 outrel.r_addend = 0;
1964 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1965 loc = htab->etab.srelgot->contents;
1966 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1967 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1968 htab->tls_ldm_got.offset |= 1;
1969 }
1970
1971 relocation = off - GOT_REG_OFFSET;
1972 break;
1973 }
1974 default:
1975 break;
1976 }
1977
1978 r = metag_final_link_relocate (howto, input_bfd, input_section,
1979 contents, rel, relocation, hh, htab,
1980 sec);
1981
1982 if (r != bfd_reloc_ok)
1983 {
1984 const char * msg = (const char *) NULL;
1985
1986 switch (r)
1987 {
1988 case bfd_reloc_overflow:
1989 (*info->callbacks->reloc_overflow)
1990 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1991 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1992 break;
1993
1994 case bfd_reloc_undefined:
1995 (*info->callbacks->undefined_symbol)
1996 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1997 break;
1998
1999 case bfd_reloc_outofrange:
2000 msg = _("internal error: out of range error");
2001 break;
2002
2003 case bfd_reloc_notsupported:
2004 msg = _("internal error: unsupported relocation error");
2005 break;
2006
2007 case bfd_reloc_dangerous:
2008 msg = _("internal error: dangerous relocation");
2009 break;
2010
2011 default:
2012 msg = _("internal error: unknown error");
2013 break;
2014 }
2015
2016 if (msg)
2017 (*info->callbacks->warning) (info, msg, name, input_bfd,
2018 input_section, rel->r_offset);
2019 }
2020 }
2021
2022 return TRUE;
2023 }
2024
2025 /* Create the .plt and .got sections, and set up our hash table
2026 short-cuts to various dynamic sections. */
2027
2028 static bfd_boolean
2029 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2030 {
2031 struct elf_metag_link_hash_table *htab;
2032 struct elf_link_hash_entry *eh;
2033 struct bfd_link_hash_entry *bh;
2034 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2035
2036 /* Don't try to create the .plt and .got twice. */
2037 htab = metag_link_hash_table (info);
2038 if (htab->etab.splt != NULL)
2039 return TRUE;
2040
2041 /* Call the generic code to do most of the work. */
2042 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2043 return FALSE;
2044
2045 /* The header goes at the start of the dynamic .got section, which
2046 is placed after the dynamic .got.plt section. ie. The header is
2047 not necessarily at the start of the output .got section. */
2048 htab->etab.sgot->size += 12;
2049
2050 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
2051 bh = NULL;
2052 if (!(_bfd_generic_link_add_one_symbol
2053 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot,
2054 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2055 return FALSE;
2056 eh = (struct elf_link_hash_entry *) bh;
2057 eh->def_regular = 1;
2058 eh->type = STT_OBJECT;
2059 eh->other = STV_HIDDEN;
2060
2061 if (! bfd_link_executable (info)
2062 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2063 return FALSE;
2064
2065 htab->etab.hgot = eh;
2066
2067 return TRUE;
2068 }
2069
2070 /* Look through the relocs for a section during the first phase, and
2071 calculate needed space in the global offset table, procedure linkage
2072 table, and dynamic reloc sections. At this point we haven't
2073 necessarily read all the input files. */
2074
2075 static bfd_boolean
2076 elf_metag_check_relocs (bfd *abfd,
2077 struct bfd_link_info *info,
2078 asection *sec,
2079 const Elf_Internal_Rela *relocs)
2080 {
2081 Elf_Internal_Shdr *symtab_hdr;
2082 struct elf_link_hash_entry **eh_syms;
2083 const Elf_Internal_Rela *rel;
2084 const Elf_Internal_Rela *rel_end;
2085 struct elf_metag_link_hash_table *htab;
2086 asection *sreloc;
2087 bfd *dynobj;
2088 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2089
2090 if (bfd_link_relocatable (info))
2091 return TRUE;
2092
2093 htab = metag_link_hash_table (info);
2094 dynobj = htab->etab.dynobj;
2095 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2096 eh_syms = elf_sym_hashes (abfd);
2097 sreloc = NULL;
2098
2099 if (htab == NULL)
2100 return FALSE;
2101
2102 rel_end = relocs + sec->reloc_count;
2103 for (rel = relocs; rel < rel_end; rel++)
2104 {
2105 int r_type;
2106 struct elf_metag_link_hash_entry *hh;
2107 Elf_Internal_Sym *isym;
2108 unsigned long r_symndx;
2109
2110 r_symndx = ELF32_R_SYM (rel->r_info);
2111 r_type = ELF32_R_TYPE (rel->r_info);
2112 if (r_symndx < symtab_hdr->sh_info)
2113 {
2114 /* A local symbol. */
2115 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2116 abfd, r_symndx);
2117 if (isym == NULL)
2118 return FALSE;
2119
2120 hh = NULL;
2121 }
2122 else
2123 {
2124 isym = NULL;
2125
2126 hh = (struct elf_metag_link_hash_entry *)
2127 eh_syms[r_symndx - symtab_hdr->sh_info];
2128 while (hh->eh.root.type == bfd_link_hash_indirect
2129 || hh->eh.root.type == bfd_link_hash_warning)
2130 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2131
2132 /* PR15323, ref flags aren't set for references in the same
2133 object. */
2134 hh->eh.root.non_ir_ref_regular = 1;
2135 }
2136
2137 /* Some relocs require a global offset table. */
2138 if (htab->etab.sgot == NULL)
2139 {
2140 switch (r_type)
2141 {
2142 case R_METAG_TLS_GD:
2143 case R_METAG_TLS_LDM:
2144 case R_METAG_TLS_IE:
2145 if (bfd_link_pic (info))
2146 info->flags |= DF_STATIC_TLS;
2147 /* Fall through. */
2148
2149 case R_METAG_HI16_GOTOFF:
2150 case R_METAG_LO16_GOTOFF:
2151 case R_METAG_GETSET_GOTOFF:
2152 case R_METAG_GETSET_GOT:
2153 case R_METAG_HI16_GOTPC:
2154 case R_METAG_LO16_GOTPC:
2155 if (dynobj == NULL)
2156 htab->etab.dynobj = dynobj = abfd;
2157 if (!elf_metag_create_dynamic_sections (dynobj, info))
2158 return FALSE;
2159 break;
2160
2161 default:
2162 break;
2163 }
2164 }
2165
2166 switch (r_type)
2167 {
2168 case R_METAG_TLS_IE:
2169 case R_METAG_TLS_GD:
2170 case R_METAG_GETSET_GOT:
2171 switch (r_type)
2172 {
2173 default:
2174 tls_type = GOT_NORMAL;
2175 break;
2176 case R_METAG_TLS_IE:
2177 tls_type = GOT_TLS_IE;
2178 break;
2179 case R_METAG_TLS_GD:
2180 tls_type = GOT_TLS_GD;
2181 break;
2182 }
2183
2184 if (hh != NULL)
2185 {
2186 hh->eh.got.refcount += 1;
2187 old_tls_type = hh->tls_type;
2188 }
2189 else
2190 {
2191 bfd_signed_vma *local_got_refcounts;
2192
2193 /* This is a global offset table entry for a local
2194 symbol. */
2195 local_got_refcounts = elf_local_got_refcounts (abfd);
2196 if (local_got_refcounts == NULL)
2197 {
2198 bfd_size_type size;
2199
2200 size = symtab_hdr->sh_info;
2201 size *= sizeof (bfd_signed_vma);
2202 /* Add in space to store the local GOT TLS types. */
2203 size += symtab_hdr->sh_info;
2204 local_got_refcounts = ((bfd_signed_vma *)
2205 bfd_zalloc (abfd, size));
2206 if (local_got_refcounts == NULL)
2207 return FALSE;
2208 elf_local_got_refcounts (abfd) = local_got_refcounts;
2209 memset (metag_elf_local_got_tls_type (abfd),
2210 GOT_UNKNOWN, symtab_hdr->sh_info);
2211 }
2212 local_got_refcounts[r_symndx] += 1;
2213 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2214 }
2215
2216 if (old_tls_type != tls_type)
2217 {
2218 if (hh != NULL)
2219 {
2220 hh->tls_type = tls_type;
2221 }
2222 else
2223 {
2224 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2225 }
2226 }
2227
2228 break;
2229
2230 case R_METAG_TLS_LDM:
2231 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2232 break;
2233
2234 case R_METAG_RELBRANCH_PLT:
2235 /* This symbol requires a procedure linkage table entry. We
2236 actually build the entry in adjust_dynamic_symbol,
2237 because this might be a case of linking PIC code without
2238 linking in any dynamic objects, in which case we don't
2239 need to generate a procedure linkage table after all. */
2240
2241 /* If this is a local symbol, we resolve it directly without
2242 creating a procedure linkage table entry. */
2243 if (hh == NULL)
2244 continue;
2245
2246 if (hh->eh.forced_local)
2247 break;
2248
2249 hh->eh.needs_plt = 1;
2250 hh->eh.plt.refcount += 1;
2251 break;
2252
2253 case R_METAG_HIADDR16:
2254 case R_METAG_LOADDR16:
2255 /* Let's help debug shared library creation. These relocs
2256 cannot be used in shared libs. Don't error out for
2257 sections we don't care about, such as debug sections or
2258 non-constant sections. */
2259 if (bfd_link_pic (info)
2260 && (sec->flags & SEC_ALLOC) != 0
2261 && (sec->flags & SEC_READONLY) != 0)
2262 {
2263 const char *name;
2264
2265 if (hh)
2266 name = hh->eh.root.root.string;
2267 else
2268 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2269 _bfd_error_handler
2270 /* xgettext:c-format */
2271 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2272 abfd, elf_metag_howto_table[r_type].name, name);
2273 bfd_set_error (bfd_error_bad_value);
2274 return FALSE;
2275 }
2276
2277 /* Fall through. */
2278 case R_METAG_ADDR32:
2279 case R_METAG_RELBRANCH:
2280 case R_METAG_GETSETOFF:
2281 if (hh != NULL && !bfd_link_pic (info))
2282 {
2283 hh->eh.non_got_ref = 1;
2284 hh->eh.plt.refcount += 1;
2285 }
2286
2287 /* If we are creating a shared library, and this is a reloc
2288 against a global symbol, or a non PC relative reloc
2289 against a local symbol, then we need to copy the reloc
2290 into the shared library. However, if we are linking with
2291 -Bsymbolic, we do not need to copy a reloc against a
2292 global symbol which is defined in an object we are
2293 including in the link (i.e., DEF_REGULAR is set). At
2294 this point we have not seen all the input files, so it is
2295 possible that DEF_REGULAR is not set now but will be set
2296 later (it is never cleared). We account for that
2297 possibility below by storing information in the
2298 dyn_relocs field of the hash table entry. A similar
2299 situation occurs when creating shared libraries and symbol
2300 visibility changes render the symbol local.
2301
2302 If on the other hand, we are creating an executable, we
2303 may need to keep relocations for symbols satisfied by a
2304 dynamic library if we manage to avoid copy relocs for the
2305 symbol. */
2306 if ((bfd_link_pic (info)
2307 && (sec->flags & SEC_ALLOC) != 0
2308 && (r_type != R_METAG_RELBRANCH
2309 || (hh != NULL
2310 && (! info->symbolic
2311 || hh->eh.root.type == bfd_link_hash_defweak
2312 || !hh->eh.def_regular))))
2313 || (!bfd_link_pic (info)
2314 && (sec->flags & SEC_ALLOC) != 0
2315 && hh != NULL
2316 && (hh->eh.root.type == bfd_link_hash_defweak
2317 || !hh->eh.def_regular)))
2318 {
2319 struct elf_metag_dyn_reloc_entry *hdh_p;
2320 struct elf_metag_dyn_reloc_entry **hdh_head;
2321
2322 if (dynobj == NULL)
2323 htab->etab.dynobj = dynobj = abfd;
2324
2325 /* When creating a shared object, we must copy these
2326 relocs into the output file. We create a reloc
2327 section in dynobj and make room for the reloc. */
2328 if (sreloc == NULL)
2329 {
2330 sreloc = _bfd_elf_make_dynamic_reloc_section
2331 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2332
2333 if (sreloc == NULL)
2334 {
2335 bfd_set_error (bfd_error_bad_value);
2336 return FALSE;
2337 }
2338
2339 elf_section_data (sec)->sreloc = sreloc;
2340 }
2341
2342 /* If this is a global symbol, we count the number of
2343 relocations we need for this symbol. */
2344 if (hh != NULL)
2345 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2346 else
2347 {
2348 /* Track dynamic relocs needed for local syms too. */
2349 asection *sr;
2350 void *vpp;
2351
2352 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2353 if (sr == NULL)
2354 sr = sec;
2355
2356 vpp = &elf_section_data (sr)->local_dynrel;
2357 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2358 }
2359
2360 hdh_p = *hdh_head;
2361 if (hdh_p == NULL || hdh_p->sec != sec)
2362 {
2363 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2364 bfd_alloc (dynobj, sizeof *hdh_p));
2365 if (hdh_p == NULL)
2366 return FALSE;
2367 hdh_p->hdh_next = *hdh_head;
2368 *hdh_head = hdh_p;
2369 hdh_p->sec = sec;
2370 hdh_p->count = 0;
2371 hdh_p->relative_count = 0;
2372 }
2373
2374 hdh_p->count += 1;
2375 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2376 hdh_p->relative_count += 1;
2377 }
2378 break;
2379
2380 /* This relocation describes the C++ object vtable hierarchy.
2381 Reconstruct it for later use during GC. */
2382 case R_METAG_GNU_VTINHERIT:
2383 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2384 rel->r_offset))
2385 return FALSE;
2386 break;
2387
2388 /* This relocation describes which C++ vtable entries are actually
2389 used. Record for later use during GC. */
2390 case R_METAG_GNU_VTENTRY:
2391 BFD_ASSERT (hh != NULL);
2392 if (hh != NULL
2393 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2394 return FALSE;
2395 break;
2396 }
2397 }
2398
2399 return TRUE;
2400 }
2401
2402 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2403
2404 static void
2405 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2406 struct elf_link_hash_entry *eh_dir,
2407 struct elf_link_hash_entry *eh_ind)
2408 {
2409 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2410
2411 hh_dir = metag_elf_hash_entry (eh_dir);
2412 hh_ind = metag_elf_hash_entry (eh_ind);
2413
2414 if (hh_ind->dyn_relocs != NULL)
2415 {
2416 if (hh_dir->dyn_relocs != NULL)
2417 {
2418 struct elf_metag_dyn_reloc_entry **hdh_pp;
2419 struct elf_metag_dyn_reloc_entry *hdh_p;
2420
2421 if (eh_ind->root.type == bfd_link_hash_indirect)
2422 abort ();
2423
2424 /* Add reloc counts against the weak sym to the strong sym
2425 list. Merge any entries against the same section. */
2426 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2427 {
2428 struct elf_metag_dyn_reloc_entry *hdh_q;
2429
2430 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2431 hdh_q = hdh_q->hdh_next)
2432 if (hdh_q->sec == hdh_p->sec)
2433 {
2434 hdh_q->relative_count += hdh_p->relative_count;
2435 hdh_q->count += hdh_p->count;
2436 *hdh_pp = hdh_p->hdh_next;
2437 break;
2438 }
2439 if (hdh_q == NULL)
2440 hdh_pp = &hdh_p->hdh_next;
2441 }
2442 *hdh_pp = hh_dir->dyn_relocs;
2443 }
2444
2445 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2446 hh_ind->dyn_relocs = NULL;
2447 }
2448
2449 if (eh_ind->root.type == bfd_link_hash_indirect
2450 && eh_dir->got.refcount <= 0)
2451 {
2452 hh_dir->tls_type = hh_ind->tls_type;
2453 hh_ind->tls_type = GOT_UNKNOWN;
2454 }
2455
2456 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2457 }
2458
2459 /* Adjust a symbol defined by a dynamic object and referenced by a
2460 regular object. The current definition is in some section of the
2461 dynamic object, but we're not including those sections. We have to
2462 change the definition to something the rest of the link can
2463 understand. */
2464
2465 static bfd_boolean
2466 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2467 struct elf_link_hash_entry *eh)
2468 {
2469 struct elf_metag_link_hash_table *htab;
2470 struct elf_metag_link_hash_entry *hh;
2471 struct elf_metag_dyn_reloc_entry *hdh_p;
2472 asection *s, *srel;
2473
2474 /* If this is a function, put it in the procedure linkage table. We
2475 will fill in the contents of the procedure linkage table later,
2476 when we know the address of the .got section. */
2477 if (eh->type == STT_FUNC
2478 || eh->needs_plt)
2479 {
2480 if (eh->plt.refcount <= 0
2481 || SYMBOL_CALLS_LOCAL (info, eh)
2482 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2483 && eh->root.type == bfd_link_hash_undefweak))
2484 {
2485 /* This case can occur if we saw a PLT reloc in an input
2486 file, but the symbol was never referred to by a dynamic
2487 object. In such a case, we don't actually need to build
2488 a procedure linkage table, and we can just do a PCREL
2489 reloc instead. */
2490 eh->plt.offset = (bfd_vma) -1;
2491 eh->needs_plt = 0;
2492 }
2493
2494 return TRUE;
2495 }
2496 else
2497 eh->plt.offset = (bfd_vma) -1;
2498
2499 /* If this is a weak symbol, and there is a real definition, the
2500 processor independent code will have arranged for us to see the
2501 real definition first, and we can just use the same value. */
2502 if (eh->is_weakalias)
2503 {
2504 struct elf_link_hash_entry *def = weakdef (eh);
2505 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2506 eh->root.u.def.section = def->root.u.def.section;
2507 eh->root.u.def.value = def->root.u.def.value;
2508 eh->non_got_ref = def->non_got_ref;
2509 return TRUE;
2510 }
2511
2512 /* This is a reference to a symbol defined by a dynamic object which
2513 is not a function. */
2514
2515 /* If we are creating a shared library, we must presume that the
2516 only references to the symbol are via the global offset table.
2517 For such cases we need not do anything here; the relocations will
2518 be handled correctly by relocate_section. */
2519 if (bfd_link_pic (info))
2520 return TRUE;
2521
2522 /* If there are no references to this symbol that do not use the
2523 GOT, we don't need to generate a copy reloc. */
2524 if (!eh->non_got_ref)
2525 return TRUE;
2526
2527 /* If -z nocopyreloc was given, we won't generate them either. */
2528 if (info->nocopyreloc)
2529 {
2530 eh->non_got_ref = 0;
2531 return TRUE;
2532 }
2533
2534 hh = (struct elf_metag_link_hash_entry *) eh;
2535 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2536 {
2537 s = hdh_p->sec->output_section;
2538 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2539 break;
2540 }
2541
2542 /* If we didn't find any dynamic relocs in read-only sections, then
2543 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2544 if (hdh_p == NULL)
2545 {
2546 eh->non_got_ref = 0;
2547 return TRUE;
2548 }
2549
2550 /* We must allocate the symbol in our .dynbss section, which will
2551 become part of the .bss section of the executable. There will be
2552 an entry for this symbol in the .dynsym section. The dynamic
2553 object will contain position independent code, so all references
2554 from the dynamic object to this symbol will go through the global
2555 offset table. The dynamic linker will use the .dynsym entry to
2556 determine the address it must put in the global offset table, so
2557 both the dynamic object and the regular object will refer to the
2558 same memory location for the variable. */
2559
2560 htab = metag_link_hash_table (info);
2561
2562 /* We must generate a COPY reloc to tell the dynamic linker to
2563 copy the initial value out of the dynamic object and into the
2564 runtime process image. */
2565 if ((eh->root.u.def.section->flags & SEC_READONLY) != 0)
2566 {
2567 s = htab->etab.sdynrelro;
2568 srel = htab->etab.sreldynrelro;
2569 }
2570 else
2571 {
2572 s = htab->etab.sdynbss;
2573 srel = htab->etab.srelbss;
2574 }
2575 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2576 {
2577 srel->size += sizeof (Elf32_External_Rela);
2578 eh->needs_copy = 1;
2579 }
2580
2581 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
2582 }
2583
2584 /* Allocate space in .plt, .got and associated reloc sections for
2585 global syms. */
2586
2587 static bfd_boolean
2588 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2589 {
2590 struct bfd_link_info *info;
2591 struct elf_metag_link_hash_table *htab;
2592 struct elf_metag_link_hash_entry *hh;
2593 struct elf_metag_dyn_reloc_entry *hdh_p;
2594
2595 if (eh->root.type == bfd_link_hash_indirect)
2596 return TRUE;
2597
2598 if (eh->root.type == bfd_link_hash_warning)
2599 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2600
2601 info = inf;
2602 htab = metag_link_hash_table (info);
2603
2604 if (htab->etab.dynamic_sections_created
2605 && eh->plt.refcount > 0)
2606 {
2607 /* Make sure this symbol is output as a dynamic symbol.
2608 Undefined weak syms won't yet be marked as dynamic. */
2609 if (eh->dynindx == -1
2610 && !eh->forced_local)
2611 {
2612 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2613 return FALSE;
2614 }
2615
2616 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
2617 {
2618 asection *s = htab->etab.splt;
2619
2620 /* If this is the first .plt entry, make room for the special
2621 first entry. */
2622 if (s->size == 0)
2623 s->size += PLT_ENTRY_SIZE;
2624
2625 eh->plt.offset = s->size;
2626
2627 /* If this symbol is not defined in a regular file, and we are
2628 not generating a shared library, then set the symbol to this
2629 location in the .plt. This is required to make function
2630 pointers compare as equal between the normal executable and
2631 the shared library. */
2632 if (! bfd_link_pic (info)
2633 && !eh->def_regular)
2634 {
2635 eh->root.u.def.section = s;
2636 eh->root.u.def.value = eh->plt.offset;
2637 }
2638
2639 /* Make room for this entry. */
2640 s->size += PLT_ENTRY_SIZE;
2641
2642 /* We also need to make an entry in the .got.plt section, which
2643 will be placed in the .got section by the linker script. */
2644 htab->etab.sgotplt->size += 4;
2645
2646 /* We also need to make an entry in the .rel.plt section. */
2647 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
2648 }
2649 else
2650 {
2651 eh->plt.offset = (bfd_vma) -1;
2652 eh->needs_plt = 0;
2653 }
2654 }
2655 else
2656 {
2657 eh->plt.offset = (bfd_vma) -1;
2658 eh->needs_plt = 0;
2659 }
2660
2661 if (eh->got.refcount > 0)
2662 {
2663 asection *s;
2664 bfd_boolean dyn;
2665 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2666
2667 /* Make sure this symbol is output as a dynamic symbol.
2668 Undefined weak syms won't yet be marked as dynamic. */
2669 if (eh->dynindx == -1
2670 && !eh->forced_local)
2671 {
2672 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2673 return FALSE;
2674 }
2675
2676 s = htab->etab.sgot;
2677
2678 eh->got.offset = s->size;
2679 s->size += 4;
2680 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2681 if (tls_type == GOT_TLS_GD)
2682 s->size += 4;
2683 dyn = htab->etab.dynamic_sections_created;
2684 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2685 R_METAG_TLS_GD needs one if local symbol and two if global. */
2686 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2687 || (tls_type == GOT_TLS_IE && dyn))
2688 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2689 else if (tls_type == GOT_TLS_GD)
2690 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
2691 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2692 bfd_link_pic (info),
2693 eh))
2694 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2695 }
2696 else
2697 eh->got.offset = (bfd_vma) -1;
2698
2699 hh = (struct elf_metag_link_hash_entry *) eh;
2700 if (hh->dyn_relocs == NULL)
2701 return TRUE;
2702
2703 /* If this is a -Bsymbolic shared link, then we need to discard all
2704 space allocated for dynamic pc-relative relocs against symbols
2705 defined in a regular object. For the normal shared case, discard
2706 space for relocs that have become local due to symbol visibility
2707 changes. */
2708 if (bfd_link_pic (info))
2709 {
2710 if (SYMBOL_CALLS_LOCAL (info, eh))
2711 {
2712 struct elf_metag_dyn_reloc_entry **hdh_pp;
2713
2714 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2715 {
2716 hdh_p->count -= hdh_p->relative_count;
2717 hdh_p->relative_count = 0;
2718 if (hdh_p->count == 0)
2719 *hdh_pp = hdh_p->hdh_next;
2720 else
2721 hdh_pp = &hdh_p->hdh_next;
2722 }
2723 }
2724
2725 /* Also discard relocs on undefined weak syms with non-default
2726 visibility. */
2727 if (hh->dyn_relocs != NULL
2728 && eh->root.type == bfd_link_hash_undefweak)
2729 {
2730 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2731 hh->dyn_relocs = NULL;
2732
2733 /* Make sure undefined weak symbols are output as a dynamic
2734 symbol in PIEs. */
2735 else if (eh->dynindx == -1
2736 && !eh->forced_local)
2737 {
2738 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2739 return FALSE;
2740 }
2741 }
2742 }
2743 else
2744 {
2745 /* For the non-shared case, discard space for relocs against
2746 symbols which turn out to need copy relocs or are not
2747 dynamic. */
2748 if (!eh->non_got_ref
2749 && ((eh->def_dynamic
2750 && !eh->def_regular)
2751 || (htab->etab.dynamic_sections_created
2752 && (eh->root.type == bfd_link_hash_undefweak
2753 || eh->root.type == bfd_link_hash_undefined))))
2754 {
2755 /* Make sure this symbol is output as a dynamic symbol.
2756 Undefined weak syms won't yet be marked as dynamic. */
2757 if (eh->dynindx == -1
2758 && !eh->forced_local)
2759 {
2760 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2761 return FALSE;
2762 }
2763
2764 /* If that succeeded, we know we'll be keeping all the
2765 relocs. */
2766 if (eh->dynindx != -1)
2767 goto keep;
2768 }
2769
2770 hh->dyn_relocs = NULL;
2771 return TRUE;
2772
2773 keep: ;
2774 }
2775
2776 /* Finally, allocate space. */
2777 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2778 {
2779 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2780 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2781 }
2782
2783 return TRUE;
2784 }
2785
2786 /* Find any dynamic relocs that apply to read-only sections. */
2787
2788 static bfd_boolean
2789 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2790 {
2791 struct elf_metag_link_hash_entry *hh;
2792 struct elf_metag_dyn_reloc_entry *hdh_p;
2793
2794 if (eh->root.type == bfd_link_hash_warning)
2795 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2796
2797 hh = (struct elf_metag_link_hash_entry *) eh;
2798 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2799 {
2800 asection *s = hdh_p->sec->output_section;
2801
2802 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2803 {
2804 struct bfd_link_info *info = inf;
2805
2806 info->flags |= DF_TEXTREL;
2807
2808 /* Not an error, just cut short the traversal. */
2809 return FALSE;
2810 }
2811 }
2812 return TRUE;
2813 }
2814
2815 /* Set the sizes of the dynamic sections. */
2816
2817 static bfd_boolean
2818 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2819 struct bfd_link_info *info)
2820 {
2821 struct elf_metag_link_hash_table *htab;
2822 bfd *dynobj;
2823 bfd *ibfd;
2824 asection *s;
2825 bfd_boolean relocs;
2826
2827 htab = metag_link_hash_table (info);
2828 dynobj = htab->etab.dynobj;
2829 if (dynobj == NULL)
2830 abort ();
2831
2832 if (htab->etab.dynamic_sections_created)
2833 {
2834 /* Set the contents of the .interp section to the interpreter. */
2835 if (bfd_link_executable (info) && !info->nointerp)
2836 {
2837 s = bfd_get_linker_section (dynobj, ".interp");
2838 if (s == NULL)
2839 abort ();
2840 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2841 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2842 }
2843 }
2844
2845 /* Set up .got offsets for local syms, and space for local dynamic
2846 relocs. */
2847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2848 {
2849 bfd_signed_vma *local_got;
2850 bfd_signed_vma *end_local_got;
2851 bfd_size_type locsymcount;
2852 Elf_Internal_Shdr *symtab_hdr;
2853 asection *srel;
2854 char *local_tls_type;
2855
2856 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2857 continue;
2858
2859 for (s = ibfd->sections; s != NULL; s = s->next)
2860 {
2861 struct elf_metag_dyn_reloc_entry *hdh_p;
2862
2863 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2864 elf_section_data (s)->local_dynrel);
2865 hdh_p != NULL;
2866 hdh_p = hdh_p->hdh_next)
2867 {
2868 if (!bfd_is_abs_section (hdh_p->sec)
2869 && bfd_is_abs_section (hdh_p->sec->output_section))
2870 {
2871 /* Input section has been discarded, either because
2872 it is a copy of a linkonce section or due to
2873 linker script /DISCARD/, so we'll be discarding
2874 the relocs too. */
2875 }
2876 else if (hdh_p->count != 0)
2877 {
2878 srel = elf_section_data (hdh_p->sec)->sreloc;
2879 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2880 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2881 info->flags |= DF_TEXTREL;
2882 }
2883 }
2884 }
2885
2886 local_got = elf_local_got_refcounts (ibfd);
2887 if (!local_got)
2888 continue;
2889
2890 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2891 locsymcount = symtab_hdr->sh_info;
2892 end_local_got = local_got + locsymcount;
2893 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2894 s = htab->etab.sgot;
2895 srel = htab->etab.srelgot;
2896 for (; local_got < end_local_got; ++local_got)
2897 {
2898 if (*local_got > 0)
2899 {
2900 *local_got = s->size;
2901 s->size += GOT_ENTRY_SIZE;
2902 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2903 if (*local_tls_type == GOT_TLS_GD)
2904 s->size += 4;
2905 if (bfd_link_pic (info))
2906 srel->size += sizeof (Elf32_External_Rela);
2907 }
2908 else
2909 *local_got = (bfd_vma) -1;
2910 ++local_tls_type;
2911 }
2912 }
2913
2914 if (htab->tls_ldm_got.refcount > 0)
2915 {
2916 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2917 reloc. */
2918 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2919 htab->etab.sgot->size += 8;
2920 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2921 }
2922 else
2923 htab->tls_ldm_got.offset = -1;
2924
2925 /* Allocate global sym .plt and .got entries, and space for global
2926 sym dynamic relocs. */
2927 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2928
2929 /* We now have determined the sizes of the various dynamic sections.
2930 Allocate memory for them. */
2931 relocs = FALSE;
2932 for (s = dynobj->sections; s != NULL; s = s->next)
2933 {
2934 bfd_boolean reloc_section = FALSE;
2935
2936 if ((s->flags & SEC_LINKER_CREATED) == 0)
2937 continue;
2938
2939 if (s == htab->etab.splt
2940 || s == htab->etab.sgot
2941 || s == htab->etab.sgotplt
2942 || s == htab->etab.sdynbss
2943 || s == htab->etab.sdynrelro)
2944 {
2945 /* Strip this section if we don't need it; see the
2946 comment below. */
2947 }
2948 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2949 {
2950 if (s->size != 0 && s != htab->etab.srelplt)
2951 relocs = TRUE;
2952
2953 /* We use the reloc_count field as a counter if we need
2954 to copy relocs into the output file. */
2955 s->reloc_count = 0;
2956 reloc_section = TRUE;
2957 }
2958 else
2959 {
2960 /* It's not one of our sections, so don't allocate space. */
2961 continue;
2962 }
2963
2964 if (s->size == 0)
2965 {
2966 /* If we don't need this section, strip it from the
2967 output file. This is mostly to handle .rela.bss and
2968 .rela.plt. We must create both sections in
2969 create_dynamic_sections, because they must be created
2970 before the linker maps input sections to output
2971 sections. The linker does that before
2972 adjust_dynamic_symbol is called, and it is that
2973 function which decides whether anything needs to go
2974 into these sections. */
2975 s->flags |= SEC_EXCLUDE;
2976 continue;
2977 }
2978
2979 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2980 continue;
2981
2982 /* Allocate memory for the section contents. */
2983 s->contents = bfd_zalloc (dynobj, s->size);
2984 if (s->contents == NULL)
2985 return FALSE;
2986 else if (reloc_section)
2987 {
2988 unsigned char *contents = s->contents;
2989 Elf32_External_Rela reloc;
2990
2991 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2992 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2993 reloc.r_info[0] = R_METAG_NONE;
2994 for (; contents < (s->contents + s->size);
2995 contents += sizeof(Elf32_External_Rela))
2996 {
2997 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
2998 }
2999 }
3000 }
3001
3002 if (htab->etab.dynamic_sections_created)
3003 {
3004 /* Add some entries to the .dynamic section. We fill in the
3005 values later, in elf_metag_finish_dynamic_sections, but we
3006 must add the entries now so that we get the correct size for
3007 the .dynamic section. The DT_DEBUG entry is filled in by the
3008 dynamic linker and used by the debugger. */
3009 #define add_dynamic_entry(TAG, VAL) \
3010 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3011
3012 if (!add_dynamic_entry (DT_PLTGOT, 0))
3013 return FALSE;
3014
3015 if (bfd_link_executable (info))
3016 {
3017 if (!add_dynamic_entry (DT_DEBUG, 0))
3018 return FALSE;
3019 }
3020
3021 if (htab->etab.srelplt->size != 0)
3022 {
3023 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3024 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3025 || !add_dynamic_entry (DT_JMPREL, 0))
3026 return FALSE;
3027 }
3028
3029 if (relocs)
3030 {
3031 if (!add_dynamic_entry (DT_RELA, 0)
3032 || !add_dynamic_entry (DT_RELASZ, 0)
3033 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3034 return FALSE;
3035
3036 /* If any dynamic relocs apply to a read-only section,
3037 then we need a DT_TEXTREL entry. */
3038 if ((info->flags & DF_TEXTREL) == 0)
3039 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3040
3041 if ((info->flags & DF_TEXTREL) != 0)
3042 {
3043 if (!add_dynamic_entry (DT_TEXTREL, 0))
3044 return FALSE;
3045 }
3046 }
3047 }
3048 #undef add_dynamic_entry
3049
3050 return TRUE;
3051 }
3052
3053 /* Finish up dynamic symbol handling. We set the contents of various
3054 dynamic sections here. */
3055
3056 static bfd_boolean
3057 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3058 struct bfd_link_info *info,
3059 struct elf_link_hash_entry *eh,
3060 Elf_Internal_Sym *sym)
3061 {
3062 struct elf_metag_link_hash_table *htab;
3063 Elf_Internal_Rela rel;
3064 bfd_byte *loc;
3065
3066 htab = metag_link_hash_table (info);
3067
3068 if (eh->plt.offset != (bfd_vma) -1)
3069 {
3070 asection *splt;
3071 asection *sgot;
3072 asection *srela;
3073
3074 bfd_vma plt_index;
3075 bfd_vma got_offset;
3076 bfd_vma got_entry;
3077
3078 if (eh->plt.offset & 1)
3079 abort ();
3080
3081 BFD_ASSERT (eh->dynindx != -1);
3082
3083 splt = htab->etab.splt;
3084 sgot = htab->etab.sgotplt;
3085 srela = htab->etab.srelplt;
3086 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3087
3088 /* Get the index in the procedure linkage table which
3089 corresponds to this symbol. This is the index of this symbol
3090 in all the symbols for which we are making plt entries. The
3091 first entry in the procedure linkage table is reserved. */
3092 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3093
3094 /* Get the offset into the .got.plt table of the entry that
3095 corresponds to this function. */
3096 got_offset = plt_index * GOT_ENTRY_SIZE;
3097
3098 BFD_ASSERT (got_offset < (1 << 16));
3099
3100 got_entry = sgot->output_section->vma
3101 + sgot->output_offset
3102 + got_offset;
3103
3104 BFD_ASSERT (plt_index < (1 << 16));
3105
3106 /* Fill in the entry in the procedure linkage table. */
3107 if (! bfd_link_pic (info))
3108 {
3109 bfd_put_32 (output_bfd,
3110 (plt_entry[0]
3111 | (((got_entry >> 16) & 0xffff) << 3)),
3112 splt->contents + eh->plt.offset);
3113 bfd_put_32 (output_bfd,
3114 (plt_entry[1]
3115 | ((got_entry & 0xffff) << 3)),
3116 splt->contents + eh->plt.offset + 4);
3117 bfd_put_32 (output_bfd, plt_entry[2],
3118 splt->contents + eh->plt.offset + 8);
3119 bfd_put_32 (output_bfd,
3120 (plt_entry[3] | (plt_index << 3)),
3121 splt->contents + eh->plt.offset + 12);
3122 bfd_put_32 (output_bfd,
3123 (plt_entry[4]
3124 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3125 splt->contents + eh->plt.offset + 16);
3126 }
3127 else
3128 {
3129 bfd_vma addr = got_entry - (splt->output_section->vma +
3130 splt->output_offset + eh->plt.offset);
3131
3132 bfd_put_32 (output_bfd,
3133 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3134 splt->contents + eh->plt.offset);
3135 bfd_put_32 (output_bfd,
3136 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3137 splt->contents + eh->plt.offset + 4);
3138 bfd_put_32 (output_bfd, plt_pic_entry[2],
3139 splt->contents + eh->plt.offset + 8);
3140 bfd_put_32 (output_bfd,
3141 (plt_pic_entry[3] | (plt_index << 3)),
3142 splt->contents + eh->plt.offset + 12);
3143 bfd_put_32 (output_bfd,
3144 (plt_pic_entry[4]
3145 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3146 splt->contents + eh->plt.offset + 16);
3147 }
3148
3149 /* Fill in the entry in the global offset table. */
3150 bfd_put_32 (output_bfd,
3151 (splt->output_section->vma
3152 + splt->output_offset
3153 + eh->plt.offset
3154 + 12), /* offset within PLT entry */
3155 sgot->contents + got_offset);
3156
3157 /* Fill in the entry in the .rela.plt section. */
3158 rel.r_offset = (sgot->output_section->vma
3159 + sgot->output_offset
3160 + got_offset);
3161 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3162 rel.r_addend = 0;
3163 loc = htab->etab.srelplt->contents;
3164 loc += plt_index * sizeof(Elf32_External_Rela);
3165 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3166
3167 if (!eh->def_regular)
3168 {
3169 /* Mark the symbol as undefined, rather than as defined in
3170 the .plt section. Leave the value alone. */
3171 sym->st_shndx = SHN_UNDEF;
3172 }
3173 }
3174
3175 if (eh->got.offset != (bfd_vma) -1
3176 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3177 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3178 {
3179 /* This symbol has an entry in the global offset table. Set it
3180 up. */
3181
3182 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3183 + htab->etab.sgot->output_offset
3184 + htab->etab.sgot->output_section->vma);
3185
3186 /* If this is a -Bsymbolic link and the symbol is defined
3187 locally or was forced to be local because of a version file,
3188 we just want to emit a RELATIVE reloc. The entry in the
3189 global offset table will already have been initialized in the
3190 relocate_section function. */
3191 if (bfd_link_pic (info)
3192 && (info->symbolic || eh->dynindx == -1)
3193 && eh->def_regular)
3194 {
3195 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3196 rel.r_addend = (eh->root.u.def.value
3197 + eh->root.u.def.section->output_offset
3198 + eh->root.u.def.section->output_section->vma);
3199 }
3200 else
3201 {
3202 if ((eh->got.offset & 1) != 0)
3203 abort ();
3204 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset);
3205 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3206 rel.r_addend = 0;
3207 }
3208
3209 loc = htab->etab.srelgot->contents;
3210 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3211 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3212 }
3213
3214 if (eh->needs_copy)
3215 {
3216 asection *s;
3217
3218 /* This symbol needs a copy reloc. Set it up. */
3219
3220 if (! (eh->dynindx != -1
3221 && (eh->root.type == bfd_link_hash_defined
3222 || eh->root.type == bfd_link_hash_defweak)))
3223 abort ();
3224
3225 rel.r_offset = (eh->root.u.def.value
3226 + eh->root.u.def.section->output_offset
3227 + eh->root.u.def.section->output_section->vma);
3228 rel.r_addend = 0;
3229 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3230 if (eh->root.u.def.section == htab->etab.sdynrelro)
3231 s = htab->etab.sreldynrelro;
3232 else
3233 s = htab->etab.srelbss;
3234 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3235 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3236 }
3237
3238 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3239 if (eh->root.root.string[0] == '_'
3240 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3241 || eh == htab->etab.hgot))
3242 {
3243 sym->st_shndx = SHN_ABS;
3244 }
3245
3246 return TRUE;
3247 }
3248
3249 /* Set the Meta ELF ABI version. */
3250
3251 static void
3252 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
3253 {
3254 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3255
3256 _bfd_elf_post_process_headers (abfd, link_info);
3257 i_ehdrp = elf_elfheader (abfd);
3258 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3259 }
3260
3261 /* Used to decide how to sort relocs in an optimal manner for the
3262 dynamic linker, before writing them out. */
3263
3264 static enum elf_reloc_type_class
3265 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3266 const asection *rel_sec ATTRIBUTE_UNUSED,
3267 const Elf_Internal_Rela *rela)
3268 {
3269 switch ((int) ELF32_R_TYPE (rela->r_info))
3270 {
3271 case R_METAG_RELATIVE:
3272 return reloc_class_relative;
3273 case R_METAG_JMP_SLOT:
3274 return reloc_class_plt;
3275 case R_METAG_COPY:
3276 return reloc_class_copy;
3277 default:
3278 return reloc_class_normal;
3279 }
3280 }
3281
3282 /* Finish up the dynamic sections. */
3283
3284 static bfd_boolean
3285 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3286 struct bfd_link_info *info)
3287 {
3288 bfd *dynobj;
3289 struct elf_metag_link_hash_table *htab;
3290 asection *sdyn;
3291
3292 htab = metag_link_hash_table (info);
3293 dynobj = htab->etab.dynobj;
3294
3295 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3296
3297 if (htab->etab.dynamic_sections_created)
3298 {
3299 asection *splt;
3300 Elf32_External_Dyn *dyncon, *dynconend;
3301
3302 if (sdyn == NULL)
3303 abort ();
3304
3305 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3306 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3307 for (; dyncon < dynconend; dyncon++)
3308 {
3309 Elf_Internal_Dyn dyn;
3310 asection *s;
3311
3312 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3313
3314 switch (dyn.d_tag)
3315 {
3316 default:
3317 continue;
3318
3319 case DT_PLTGOT:
3320 s = htab->etab.sgot;
3321 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3322 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3323 break;
3324
3325 case DT_JMPREL:
3326 s = htab->etab.srelplt;
3327 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3328 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3329 break;
3330
3331 case DT_PLTRELSZ:
3332 s = htab->etab.srelplt;
3333 dyn.d_un.d_val = s->size;
3334 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3335 break;
3336 }
3337
3338 }
3339
3340 /* Fill in the first entry in the procedure linkage table. */
3341 splt = htab->etab.splt;
3342 if (splt && splt->size > 0)
3343 {
3344 unsigned long addr;
3345 /* addr = .got + 4 */
3346 addr = (htab->etab.sgot->output_section->vma
3347 + htab->etab.sgot->output_offset + 4);
3348 if (bfd_link_pic (info))
3349 {
3350 addr -= splt->output_section->vma + splt->output_offset;
3351 bfd_put_32 (output_bfd,
3352 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3353 splt->contents);
3354 bfd_put_32 (output_bfd,
3355 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3356 splt->contents + 4);
3357 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3358 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3359 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3360 }
3361 else
3362 {
3363 bfd_put_32 (output_bfd,
3364 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3365 splt->contents);
3366 bfd_put_32 (output_bfd,
3367 plt0_entry[1] | ((addr & 0xffff) << 3),
3368 splt->contents + 4);
3369 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3370 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3371 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3372 }
3373
3374 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3375 PLT_ENTRY_SIZE;
3376 }
3377 }
3378
3379 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
3380 {
3381 /* Fill in the first entry in the global offset table.
3382 We use it to point to our dynamic section, if we have one. */
3383 bfd_put_32 (output_bfd,
3384 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3385 htab->etab.sgot->contents);
3386
3387 /* The second entry is reserved for use by the dynamic linker. */
3388 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3389
3390 /* Set .got entry size. */
3391 elf_section_data (htab->etab.sgot->output_section)
3392 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3393 }
3394
3395 return TRUE;
3396 }
3397
3398 /* Return the section that should be marked against GC for a given
3399 relocation. */
3400
3401 static asection *
3402 elf_metag_gc_mark_hook (asection *sec,
3403 struct bfd_link_info *info,
3404 Elf_Internal_Rela *rela,
3405 struct elf_link_hash_entry *hh,
3406 Elf_Internal_Sym *sym)
3407 {
3408 if (hh != NULL)
3409 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3410 {
3411 case R_METAG_GNU_VTINHERIT:
3412 case R_METAG_GNU_VTENTRY:
3413 return NULL;
3414 }
3415
3416 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3417 }
3418
3419 /* Determine the type of stub needed, if any, for a call. */
3420
3421 static enum elf_metag_stub_type
3422 metag_type_of_stub (asection *input_sec,
3423 const Elf_Internal_Rela *rel,
3424 struct elf_metag_link_hash_entry *hh,
3425 bfd_vma destination,
3426 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3427 {
3428 bfd_vma location;
3429 bfd_vma branch_offset;
3430 bfd_vma max_branch_offset;
3431
3432 if (hh != NULL &&
3433 !(hh->eh.root.type == bfd_link_hash_defined
3434 || hh->eh.root.type == bfd_link_hash_defweak))
3435 return metag_stub_none;
3436
3437 /* Determine where the call point is. */
3438 location = (input_sec->output_offset
3439 + input_sec->output_section->vma
3440 + rel->r_offset);
3441
3442 branch_offset = destination - location;
3443
3444 /* Determine if a long branch stub is needed. Meta branch offsets
3445 are signed 19 bits 4 byte aligned. */
3446 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3447
3448 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3449 {
3450 if (bfd_link_pic (info))
3451 return metag_stub_long_branch_shared;
3452 else
3453 return metag_stub_long_branch;
3454 }
3455
3456 return metag_stub_none;
3457 }
3458
3459 #define MOVT_A0_3 0x82180005
3460 #define JUMP_A0_3 0xac180003
3461
3462 #define MOVT_A1LBP 0x83080005
3463 #define ADD_A1LBP 0x83080000
3464
3465 #define ADDT_A0_3_CPC 0x82980001
3466 #define ADD_A0_3_A0_3 0x82180000
3467 #define MOV_PC_A0_3 0xa3180ca0
3468
3469 static bfd_boolean
3470 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3471 {
3472 struct elf_metag_stub_hash_entry *hsh;
3473 asection *stub_sec;
3474 bfd *stub_bfd;
3475 bfd_byte *loc;
3476 bfd_vma sym_value;
3477 int size;
3478
3479 /* Massage our args to the form they really have. */
3480 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3481
3482 stub_sec = hsh->stub_sec;
3483
3484 /* Make a note of the offset within the stubs for this entry. */
3485 hsh->stub_offset = stub_sec->size;
3486 loc = stub_sec->contents + hsh->stub_offset;
3487
3488 stub_bfd = stub_sec->owner;
3489
3490 switch (hsh->stub_type)
3491 {
3492 case metag_stub_long_branch_shared:
3493 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3494 calculate the jump target using A0.3 as a temporary. Then a MOV
3495 to PC carries out the jump. */
3496 sym_value = (hsh->target_value
3497 + hsh->target_section->output_offset
3498 + hsh->target_section->output_section->vma
3499 + hsh->addend);
3500
3501 sym_value -= (hsh->stub_offset
3502 + stub_sec->output_offset
3503 + stub_sec->output_section->vma);
3504
3505 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3506 loc);
3507
3508 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3509 loc + 4);
3510
3511 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3512
3513 size = 12;
3514 break;
3515 case metag_stub_long_branch:
3516 /* A standard long branch stub is a MOVT instruction followed by a
3517 JUMP instruction using the A0.3 register as a temporary. This is
3518 the same method used by the LDLK linker (patch.c). */
3519 sym_value = (hsh->target_value
3520 + hsh->target_section->output_offset
3521 + hsh->target_section->output_section->vma
3522 + hsh->addend);
3523
3524 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3525 loc);
3526
3527 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3528
3529 size = 8;
3530 break;
3531 default:
3532 BFD_FAIL ();
3533 return FALSE;
3534 }
3535
3536 stub_sec->size += size;
3537 return TRUE;
3538 }
3539
3540 /* As above, but don't actually build the stub. Just bump offset so
3541 we know stub section sizes. */
3542
3543 static bfd_boolean
3544 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3545 {
3546 struct elf_metag_stub_hash_entry *hsh;
3547 int size = 0;
3548
3549 /* Massage our args to the form they really have. */
3550 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3551
3552 if (hsh->stub_type == metag_stub_long_branch)
3553 size = 8;
3554 else if (hsh->stub_type == metag_stub_long_branch_shared)
3555 size = 12;
3556
3557 hsh->stub_sec->size += size;
3558 return TRUE;
3559 }
3560
3561 /* Set up various things so that we can make a list of input sections
3562 for each output section included in the link. Returns -1 on error,
3563 0 when no stubs will be needed, and 1 on success. */
3564
3565 int
3566 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3567 {
3568 bfd *input_bfd;
3569 unsigned int bfd_count;
3570 unsigned int top_id, top_index;
3571 asection *section;
3572 asection **input_list, **list;
3573 bfd_size_type amt;
3574 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3575
3576 /* Count the number of input BFDs and find the top input section id. */
3577 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3578 input_bfd != NULL;
3579 input_bfd = input_bfd->link.next)
3580 {
3581 bfd_count += 1;
3582 for (section = input_bfd->sections;
3583 section != NULL;
3584 section = section->next)
3585 {
3586 if (top_id < section->id)
3587 top_id = section->id;
3588 }
3589 }
3590
3591 htab->bfd_count = bfd_count;
3592
3593 amt = sizeof (struct map_stub) * (top_id + 1);
3594 htab->stub_group = bfd_zmalloc (amt);
3595 if (htab->stub_group == NULL)
3596 return -1;
3597
3598 /* We can't use output_bfd->section_count here to find the top output
3599 section index as some sections may have been removed, and
3600 strip_excluded_output_sections doesn't renumber the indices. */
3601 for (section = output_bfd->sections, top_index = 0;
3602 section != NULL;
3603 section = section->next)
3604 {
3605 if (top_index < section->index)
3606 top_index = section->index;
3607 }
3608
3609 htab->top_index = top_index;
3610 amt = sizeof (asection *) * (top_index + 1);
3611 input_list = bfd_malloc (amt);
3612 htab->input_list = input_list;
3613 if (input_list == NULL)
3614 return -1;
3615
3616 /* For sections we aren't interested in, mark their entries with a
3617 value we can check later. */
3618 list = input_list + top_index;
3619 do
3620 *list = bfd_abs_section_ptr;
3621 while (list-- != input_list);
3622
3623 for (section = output_bfd->sections;
3624 section != NULL;
3625 section = section->next)
3626 {
3627 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3628 * have PC relative relocs in them but no code flag set. */
3629 if (((section->flags & SEC_CODE) != 0) ||
3630 strcmp(".ctors", section->name) ||
3631 strcmp(".dtors", section->name))
3632 input_list[section->index] = NULL;
3633 }
3634
3635 return 1;
3636 }
3637
3638 /* The linker repeatedly calls this function for each input section,
3639 in the order that input sections are linked into output sections.
3640 Build lists of input sections to determine groupings between which
3641 we may insert linker stubs. */
3642
3643 void
3644 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3645 {
3646 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3647
3648 if (isec->output_section->index <= htab->top_index)
3649 {
3650 asection **list = htab->input_list + isec->output_section->index;
3651 if (*list != bfd_abs_section_ptr)
3652 {
3653 /* Steal the link_sec pointer for our list. */
3654 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3655 /* This happens to make the list in reverse order,
3656 which is what we want. */
3657 PREV_SEC (isec) = *list;
3658 *list = isec;
3659 }
3660 }
3661 }
3662
3663 /* See whether we can group stub sections together. Grouping stub
3664 sections may result in fewer stubs. More importantly, we need to
3665 put all .init* and .fini* stubs at the beginning of the .init or
3666 .fini output sections respectively, because glibc splits the
3667 _init and _fini functions into multiple parts. Putting a stub in
3668 the middle of a function is not a good idea. */
3669
3670 static void
3671 group_sections (struct elf_metag_link_hash_table *htab,
3672 bfd_size_type stub_group_size,
3673 bfd_boolean stubs_always_before_branch)
3674 {
3675 asection **list = htab->input_list + htab->top_index;
3676 do
3677 {
3678 asection *tail = *list;
3679 if (tail == bfd_abs_section_ptr)
3680 continue;
3681 while (tail != NULL)
3682 {
3683 asection *curr;
3684 asection *prev;
3685 bfd_size_type total;
3686 bfd_boolean big_sec;
3687
3688 curr = tail;
3689 total = tail->size;
3690 big_sec = total >= stub_group_size;
3691
3692 while ((prev = PREV_SEC (curr)) != NULL
3693 && ((total += curr->output_offset - prev->output_offset)
3694 < stub_group_size))
3695 curr = prev;
3696
3697 /* OK, the size from the start of CURR to the end is less
3698 than stub_group_size bytes and thus can be handled by one stub
3699 section. (or the tail section is itself larger than
3700 stub_group_size bytes, in which case we may be toast.)
3701 We should really be keeping track of the total size of
3702 stubs added here, as stubs contribute to the final output
3703 section size. */
3704 do
3705 {
3706 prev = PREV_SEC (tail);
3707 /* Set up this stub group. */
3708 htab->stub_group[tail->id].link_sec = curr;
3709 }
3710 while (tail != curr && (tail = prev) != NULL);
3711
3712 /* But wait, there's more! Input sections up to stub_group_size
3713 bytes before the stub section can be handled by it too.
3714 Don't do this if we have a really large section after the
3715 stubs, as adding more stubs increases the chance that
3716 branches may not reach into the stub section. */
3717 if (!stubs_always_before_branch && !big_sec)
3718 {
3719 total = 0;
3720 while (prev != NULL
3721 && ((total += tail->output_offset - prev->output_offset)
3722 < stub_group_size))
3723 {
3724 tail = prev;
3725 prev = PREV_SEC (tail);
3726 htab->stub_group[tail->id].link_sec = curr;
3727 }
3728 }
3729 tail = prev;
3730 }
3731 }
3732 while (list-- != htab->input_list);
3733 free (htab->input_list);
3734 #undef PREV_SEC
3735 }
3736
3737 /* Read in all local syms for all input bfds.
3738 Returns -1 on error, 0 otherwise. */
3739
3740 static int
3741 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3742 struct bfd_link_info *info)
3743 {
3744 unsigned int bfd_indx;
3745 Elf_Internal_Sym *local_syms, **all_local_syms;
3746 int stub_changed = 0;
3747 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3748
3749 /* We want to read in symbol extension records only once. To do this
3750 we need to read in the local symbols in parallel and save them for
3751 later use; so hold pointers to the local symbols in an array. */
3752 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3753 all_local_syms = bfd_zmalloc (amt);
3754 htab->all_local_syms = all_local_syms;
3755 if (all_local_syms == NULL)
3756 return -1;
3757
3758 /* Walk over all the input BFDs, swapping in local symbols. */
3759 for (bfd_indx = 0;
3760 input_bfd != NULL;
3761 input_bfd = input_bfd->link.next, bfd_indx++)
3762 {
3763 Elf_Internal_Shdr *symtab_hdr;
3764
3765 /* We'll need the symbol table in a second. */
3766 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3767 if (symtab_hdr->sh_info == 0)
3768 continue;
3769
3770 /* We need an array of the local symbols attached to the input bfd. */
3771 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3772 if (local_syms == NULL)
3773 {
3774 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3775 symtab_hdr->sh_info, 0,
3776 NULL, NULL, NULL);
3777 /* Cache them for elf_link_input_bfd. */
3778 symtab_hdr->contents = (unsigned char *) local_syms;
3779 }
3780 if (local_syms == NULL)
3781 return -1;
3782
3783 all_local_syms[bfd_indx] = local_syms;
3784 }
3785
3786 return stub_changed;
3787 }
3788
3789 /* Determine and set the size of the stub section for a final link.
3790
3791 The basic idea here is to examine all the relocations looking for
3792 PC-relative calls to a target that is unreachable with a "CALLR"
3793 instruction. */
3794
3795 /* See elf32-hppa.c and elf64-ppc.c. */
3796
3797 bfd_boolean
3798 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3799 struct bfd_link_info *info,
3800 bfd_signed_vma group_size,
3801 asection * (*add_stub_section) (const char *, asection *),
3802 void (*layout_sections_again) (void))
3803 {
3804 bfd_size_type stub_group_size;
3805 bfd_boolean stubs_always_before_branch;
3806 bfd_boolean stub_changed;
3807 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3808
3809 /* Stash our params away. */
3810 htab->stub_bfd = stub_bfd;
3811 htab->add_stub_section = add_stub_section;
3812 htab->layout_sections_again = layout_sections_again;
3813 stubs_always_before_branch = group_size < 0;
3814 if (group_size < 0)
3815 stub_group_size = -group_size;
3816 else
3817 stub_group_size = group_size;
3818 if (stub_group_size == 1)
3819 {
3820 /* Default values. */
3821 /* FIXME: not sure what these values should be */
3822 if (stubs_always_before_branch)
3823 {
3824 stub_group_size = (1 << BRANCH_BITS);
3825 }
3826 else
3827 {
3828 stub_group_size = (1 << BRANCH_BITS);
3829 }
3830 }
3831
3832 group_sections (htab, stub_group_size, stubs_always_before_branch);
3833
3834 switch (get_local_syms (output_bfd, info->input_bfds, info))
3835 {
3836 default:
3837 if (htab->all_local_syms)
3838 goto error_ret_free_local;
3839 return FALSE;
3840
3841 case 0:
3842 stub_changed = FALSE;
3843 break;
3844
3845 case 1:
3846 stub_changed = TRUE;
3847 break;
3848 }
3849
3850 while (1)
3851 {
3852 bfd *input_bfd;
3853 unsigned int bfd_indx;
3854 asection *stub_sec;
3855
3856 for (input_bfd = info->input_bfds, bfd_indx = 0;
3857 input_bfd != NULL;
3858 input_bfd = input_bfd->link.next, bfd_indx++)
3859 {
3860 Elf_Internal_Shdr *symtab_hdr;
3861 asection *section;
3862 Elf_Internal_Sym *local_syms;
3863
3864 /* We'll need the symbol table in a second. */
3865 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3866 if (symtab_hdr->sh_info == 0)
3867 continue;
3868
3869 local_syms = htab->all_local_syms[bfd_indx];
3870
3871 /* Walk over each section attached to the input bfd. */
3872 for (section = input_bfd->sections;
3873 section != NULL;
3874 section = section->next)
3875 {
3876 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3877
3878 /* If there aren't any relocs, then there's nothing more
3879 to do. */
3880 if ((section->flags & SEC_RELOC) == 0
3881 || section->reloc_count == 0)
3882 continue;
3883
3884 /* If this section is a link-once section that will be
3885 discarded, then don't create any stubs. */
3886 if (section->output_section == NULL
3887 || section->output_section->owner != output_bfd)
3888 continue;
3889
3890 /* Get the relocs. */
3891 internal_relocs
3892 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
3893 info->keep_memory);
3894 if (internal_relocs == NULL)
3895 goto error_ret_free_local;
3896
3897 /* Now examine each relocation. */
3898 irela = internal_relocs;
3899 irelaend = irela + section->reloc_count;
3900 for (; irela < irelaend; irela++)
3901 {
3902 unsigned int r_type, r_indx;
3903 enum elf_metag_stub_type stub_type;
3904 struct elf_metag_stub_hash_entry *hsh;
3905 asection *sym_sec;
3906 bfd_vma sym_value;
3907 bfd_vma destination;
3908 struct elf_metag_link_hash_entry *hh;
3909 char *stub_name;
3910 const asection *id_sec;
3911
3912 r_type = ELF32_R_TYPE (irela->r_info);
3913 r_indx = ELF32_R_SYM (irela->r_info);
3914
3915 if (r_type >= (unsigned int) R_METAG_MAX)
3916 {
3917 bfd_set_error (bfd_error_bad_value);
3918 error_ret_free_internal:
3919 if (elf_section_data (section)->relocs == NULL)
3920 free (internal_relocs);
3921 goto error_ret_free_local;
3922 }
3923
3924 /* Only look for stubs on CALLR and B instructions. */
3925 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
3926 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
3927 continue;
3928
3929 /* Now determine the call target, its name, value,
3930 section. */
3931 sym_sec = NULL;
3932 sym_value = 0;
3933 destination = 0;
3934 hh = NULL;
3935 if (r_indx < symtab_hdr->sh_info)
3936 {
3937 /* It's a local symbol. */
3938 Elf_Internal_Sym *sym;
3939 Elf_Internal_Shdr *hdr;
3940 unsigned int shndx;
3941
3942 sym = local_syms + r_indx;
3943 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3944 sym_value = sym->st_value;
3945 shndx = sym->st_shndx;
3946 if (shndx < elf_numsections (input_bfd))
3947 {
3948 hdr = elf_elfsections (input_bfd)[shndx];
3949 sym_sec = hdr->bfd_section;
3950 destination = (sym_value + irela->r_addend
3951 + sym_sec->output_offset
3952 + sym_sec->output_section->vma);
3953 }
3954 }
3955 else
3956 {
3957 /* It's an external symbol. */
3958 int e_indx;
3959
3960 e_indx = r_indx - symtab_hdr->sh_info;
3961 hh = ((struct elf_metag_link_hash_entry *)
3962 elf_sym_hashes (input_bfd)[e_indx]);
3963
3964 while (hh->eh.root.type == bfd_link_hash_indirect
3965 || hh->eh.root.type == bfd_link_hash_warning)
3966 hh = ((struct elf_metag_link_hash_entry *)
3967 hh->eh.root.u.i.link);
3968
3969 if (hh->eh.root.type == bfd_link_hash_defined
3970 || hh->eh.root.type == bfd_link_hash_defweak)
3971 {
3972 sym_sec = hh->eh.root.u.def.section;
3973 sym_value = hh->eh.root.u.def.value;
3974 if (hh->eh.plt.offset != (bfd_vma) -1
3975 && hh->eh.dynindx != -1
3976 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
3977 {
3978 sym_sec = htab->etab.splt;
3979 sym_value = hh->eh.plt.offset;
3980 }
3981
3982 if (sym_sec->output_section != NULL)
3983 destination = (sym_value + irela->r_addend
3984 + sym_sec->output_offset
3985 + sym_sec->output_section->vma);
3986 else
3987 continue;
3988 }
3989 else if (hh->eh.root.type == bfd_link_hash_undefweak)
3990 {
3991 if (! bfd_link_pic (info))
3992 continue;
3993 }
3994 else if (hh->eh.root.type == bfd_link_hash_undefined)
3995 {
3996 if (! (info->unresolved_syms_in_objects == RM_IGNORE
3997 && (ELF_ST_VISIBILITY (hh->eh.other)
3998 == STV_DEFAULT)))
3999 continue;
4000 }
4001 else
4002 {
4003 bfd_set_error (bfd_error_bad_value);
4004 goto error_ret_free_internal;
4005 }
4006 }
4007
4008 /* Determine what (if any) linker stub is needed. */
4009 stub_type = metag_type_of_stub (section, irela, hh,
4010 destination, info);
4011 if (stub_type == metag_stub_none)
4012 continue;
4013
4014 /* Support for grouping stub sections. */
4015 id_sec = htab->stub_group[section->id].link_sec;
4016
4017 /* Get the name of this stub. */
4018 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4019 if (!stub_name)
4020 goto error_ret_free_internal;
4021
4022 hsh = metag_stub_hash_lookup (&htab->bstab,
4023 stub_name,
4024 FALSE, FALSE);
4025 if (hsh != NULL)
4026 {
4027 /* The proper stub has already been created. */
4028 free (stub_name);
4029 continue;
4030 }
4031
4032 hsh = metag_add_stub (stub_name, section, htab);
4033 if (hsh == NULL)
4034 {
4035 free (stub_name);
4036 goto error_ret_free_internal;
4037 }
4038 hsh->target_value = sym_value;
4039 hsh->target_section = sym_sec;
4040 hsh->stub_type = stub_type;
4041 hsh->hh = hh;
4042 hsh->addend = irela->r_addend;
4043 stub_changed = TRUE;
4044 }
4045
4046 /* We're done with the internal relocs, free them. */
4047 if (elf_section_data (section)->relocs == NULL)
4048 free (internal_relocs);
4049 }
4050 }
4051
4052 if (!stub_changed)
4053 break;
4054
4055 /* OK, we've added some stubs. Find out the new size of the
4056 stub sections. */
4057 for (stub_sec = htab->stub_bfd->sections;
4058 stub_sec != NULL;
4059 stub_sec = stub_sec->next)
4060 stub_sec->size = 0;
4061
4062 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4063
4064 /* Ask the linker to do its stuff. */
4065 (*htab->layout_sections_again) ();
4066 stub_changed = FALSE;
4067 }
4068
4069 free (htab->all_local_syms);
4070 return TRUE;
4071
4072 error_ret_free_local:
4073 free (htab->all_local_syms);
4074 return FALSE;
4075 }
4076
4077 /* Build all the stubs associated with the current output file. The
4078 stubs are kept in a hash table attached to the main linker hash
4079 table. This function is called via metagelf_finish in the linker. */
4080
4081 bfd_boolean
4082 elf_metag_build_stubs (struct bfd_link_info *info)
4083 {
4084 asection *stub_sec;
4085 struct bfd_hash_table *table;
4086 struct elf_metag_link_hash_table *htab;
4087
4088 htab = metag_link_hash_table (info);
4089
4090 for (stub_sec = htab->stub_bfd->sections;
4091 stub_sec != NULL;
4092 stub_sec = stub_sec->next)
4093 {
4094 bfd_size_type size;
4095
4096 /* Allocate memory to hold the linker stubs. */
4097 size = stub_sec->size;
4098 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4099 if (stub_sec->contents == NULL && size != 0)
4100 return FALSE;
4101 stub_sec->size = 0;
4102 }
4103
4104 /* Build the stubs as directed by the stub hash table. */
4105 table = &htab->bstab;
4106 bfd_hash_traverse (table, metag_build_one_stub, info);
4107
4108 return TRUE;
4109 }
4110
4111 /* Return TRUE if SYM represents a local label symbol. */
4112
4113 static bfd_boolean
4114 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4115 {
4116 if (name[0] == '$' && name[1] == 'L')
4117 return 1;
4118 return _bfd_elf_is_local_label_name (abfd, name);
4119 }
4120
4121 /* Return address for Ith PLT stub in section PLT, for relocation REL
4122 or (bfd_vma) -1 if it should not be included. */
4123
4124 static bfd_vma
4125 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4126 const arelent *rel ATTRIBUTE_UNUSED)
4127 {
4128 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4129 }
4130
4131 #define ELF_ARCH bfd_arch_metag
4132 #define ELF_TARGET_ID METAG_ELF_DATA
4133 #define ELF_MACHINE_CODE EM_METAG
4134 #define ELF_MINPAGESIZE 0x1000
4135 #define ELF_MAXPAGESIZE 0x4000
4136 #define ELF_COMMONPAGESIZE 0x1000
4137
4138 #define TARGET_LITTLE_SYM metag_elf32_vec
4139 #define TARGET_LITTLE_NAME "elf32-metag"
4140
4141 #define elf_symbol_leading_char '_'
4142
4143 #define elf_info_to_howto_rel NULL
4144 #define elf_info_to_howto metag_info_to_howto_rela
4145
4146 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4147 #define bfd_elf32_bfd_link_hash_table_create \
4148 elf_metag_link_hash_table_create
4149 #define elf_backend_relocate_section elf_metag_relocate_section
4150 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4151 #define elf_backend_check_relocs elf_metag_check_relocs
4152 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4153 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4154 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4155 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4156 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4157 #define elf_backend_omit_section_dynsym \
4158 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4159 #define elf_backend_post_process_headers elf_metag_post_process_headers
4160 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4161 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4162 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4163
4164 #define elf_backend_can_gc_sections 1
4165 #define elf_backend_can_refcount 1
4166 #define elf_backend_rela_normal 1
4167 #define elf_backend_want_got_plt 1
4168 #define elf_backend_want_got_sym 0
4169 #define elf_backend_want_plt_sym 0
4170 #define elf_backend_plt_readonly 1
4171 #define elf_backend_dtrel_excludes_plt 1
4172 #define elf_backend_want_dynrelro 1
4173
4174 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4175 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4176
4177 #include "elf32-target.h"
GDB Binutils - Deliverables
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