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[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2016 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 /* Short-cuts to get to dynamic linker sections. */
846 asection *sdynbss;
847 asection *srelbss;
848
849 /* Small local sym cache. */
850 struct sym_cache sym_cache;
851
852 /* Data for LDM relocations. */
853 union
854 {
855 bfd_signed_vma refcount;
856 bfd_vma offset;
857 } tls_ldm_got;
858 };
859
860 /* Return the base vma address which should be subtracted from the
861 real address when resolving a dtpoff relocation. This is PT_TLS
862 segment p_vaddr. */
863 static bfd_vma
864 dtpoff_base (struct bfd_link_info *info)
865 {
866 /* If tls_sec is NULL, we should have signalled an error already. */
867 if (elf_hash_table (info)->tls_sec == NULL)
868 return 0;
869 return elf_hash_table (info)->tls_sec->vma;
870 }
871
872 /* Return the relocation value for R_METAG_TLS_IE */
873 static bfd_vma
874 tpoff (struct bfd_link_info *info, bfd_vma address)
875 {
876 /* If tls_sec is NULL, we should have signalled an error already. */
877 if (elf_hash_table (info)->tls_sec == NULL)
878 return 0;
879 /* METAG TLS ABI is variant I and static TLS blocks start just after
880 tcbhead structure which has 2 pointer fields. */
881 return (address - elf_hash_table (info)->tls_sec->vma
882 + align_power ((bfd_vma) 8,
883 elf_hash_table (info)->tls_sec->alignment_power));
884 }
885
886 static void
887 metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
888 arelent *cache_ptr,
889 Elf_Internal_Rela *dst)
890 {
891 unsigned int r_type;
892
893 r_type = ELF32_R_TYPE (dst->r_info);
894 if (r_type >= (unsigned int) R_METAG_MAX)
895 {
896 /* xgettext:c-format */
897 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
898 r_type = 0;
899 }
900 cache_ptr->howto = & elf_metag_howto_table [r_type];
901 }
902
903 static reloc_howto_type *
904 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
905 bfd_reloc_code_real_type code)
906 {
907 unsigned int i;
908
909 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
910 if (metag_reloc_map [i].bfd_reloc_val == code)
911 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
912
913 return NULL;
914 }
915
916 static reloc_howto_type *
917 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
918 const char *r_name)
919 {
920 unsigned int i;
921
922 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
923 if (elf_metag_howto_table[i].name != NULL
924 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
925 return &elf_metag_howto_table[i];
926
927 return NULL;
928 }
929
930 /* Various hash macros and functions. */
931 #define metag_link_hash_table(p) \
932 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
933 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
934
935 #define metag_elf_hash_entry(ent) \
936 ((struct elf_metag_link_hash_entry *)(ent))
937
938 #define metag_stub_hash_entry(ent) \
939 ((struct elf_metag_stub_hash_entry *)(ent))
940
941 #define metag_stub_hash_lookup(table, string, create, copy) \
942 ((struct elf_metag_stub_hash_entry *) \
943 bfd_hash_lookup ((table), (string), (create), (copy)))
944
945 #define metag_elf_local_got_tls_type(abfd) \
946 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
947
948 /* Assorted hash table functions. */
949
950 /* Initialize an entry in the stub hash table. */
951
952 static struct bfd_hash_entry *
953 stub_hash_newfunc (struct bfd_hash_entry *entry,
954 struct bfd_hash_table *table,
955 const char *string)
956 {
957 /* Allocate the structure if it has not already been allocated by a
958 subclass. */
959 if (entry == NULL)
960 {
961 entry = bfd_hash_allocate (table,
962 sizeof (struct elf_metag_stub_hash_entry));
963 if (entry == NULL)
964 return entry;
965 }
966
967 /* Call the allocation method of the superclass. */
968 entry = bfd_hash_newfunc (entry, table, string);
969 if (entry != NULL)
970 {
971 struct elf_metag_stub_hash_entry *hsh;
972
973 /* Initialize the local fields. */
974 hsh = (struct elf_metag_stub_hash_entry *) entry;
975 hsh->stub_sec = NULL;
976 hsh->stub_offset = 0;
977 hsh->target_value = 0;
978 hsh->target_section = NULL;
979 hsh->stub_type = metag_stub_long_branch;
980 hsh->hh = NULL;
981 hsh->id_sec = NULL;
982 }
983
984 return entry;
985 }
986
987 /* Initialize an entry in the link hash table. */
988
989 static struct bfd_hash_entry *
990 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
991 struct bfd_hash_table *table,
992 const char *string)
993 {
994 /* Allocate the structure if it has not already been allocated by a
995 subclass. */
996 if (entry == NULL)
997 {
998 entry = bfd_hash_allocate (table,
999 sizeof (struct elf_metag_link_hash_entry));
1000 if (entry == NULL)
1001 return entry;
1002 }
1003
1004 /* Call the allocation method of the superclass. */
1005 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1006 if (entry != NULL)
1007 {
1008 struct elf_metag_link_hash_entry *hh;
1009
1010 /* Initialize the local fields. */
1011 hh = (struct elf_metag_link_hash_entry *) entry;
1012 hh->hsh_cache = NULL;
1013 hh->dyn_relocs = NULL;
1014 hh->tls_type = GOT_UNKNOWN;
1015 }
1016
1017 return entry;
1018 }
1019
1020 /* Free the derived linker hash table. */
1021
1022 static void
1023 elf_metag_link_hash_table_free (bfd *obfd)
1024 {
1025 struct elf_metag_link_hash_table *htab
1026 = (struct elf_metag_link_hash_table *) obfd->link.hash;
1027
1028 bfd_hash_table_free (&htab->bstab);
1029 _bfd_elf_link_hash_table_free (obfd);
1030 }
1031
1032 /* Create the derived linker hash table. The Meta ELF port uses the derived
1033 hash table to keep information specific to the Meta ELF linker (without
1034 using static variables). */
1035
1036 static struct bfd_link_hash_table *
1037 elf_metag_link_hash_table_create (bfd *abfd)
1038 {
1039 struct elf_metag_link_hash_table *htab;
1040 bfd_size_type amt = sizeof (*htab);
1041
1042 htab = bfd_zmalloc (amt);
1043 if (htab == NULL)
1044 return NULL;
1045
1046 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1047 metag_link_hash_newfunc,
1048 sizeof (struct elf_metag_link_hash_entry),
1049 METAG_ELF_DATA))
1050 {
1051 free (htab);
1052 return NULL;
1053 }
1054
1055 /* Init the stub hash table too. */
1056 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1057 sizeof (struct elf_metag_stub_hash_entry)))
1058 {
1059 _bfd_elf_link_hash_table_free (abfd);
1060 return NULL;
1061 }
1062 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
1063
1064 return &htab->etab.root;
1065 }
1066
1067 /* Section name for stubs is the associated section name plus this
1068 string. */
1069 #define STUB_SUFFIX ".stub"
1070
1071 /* Build a name for an entry in the stub hash table. */
1072
1073 static char *
1074 metag_stub_name (const asection *input_section,
1075 const asection *sym_sec,
1076 const struct elf_metag_link_hash_entry *hh,
1077 const Elf_Internal_Rela *rel)
1078 {
1079 char *stub_name;
1080 bfd_size_type len;
1081
1082 if (hh)
1083 {
1084 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1085 stub_name = bfd_malloc (len);
1086 if (stub_name != NULL)
1087 {
1088 sprintf (stub_name, "%08x_%s+%x",
1089 input_section->id & 0xffffffff,
1090 hh->eh.root.root.string,
1091 (int) rel->r_addend & 0xffffffff);
1092 }
1093 }
1094 else
1095 {
1096 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1097 stub_name = bfd_malloc (len);
1098 if (stub_name != NULL)
1099 {
1100 sprintf (stub_name, "%08x_%x:%x+%x",
1101 input_section->id & 0xffffffff,
1102 sym_sec->id & 0xffffffff,
1103 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1104 (int) rel->r_addend & 0xffffffff);
1105 }
1106 }
1107 return stub_name;
1108 }
1109
1110 /* Look up an entry in the stub hash. Stub entries are cached because
1111 creating the stub name takes a bit of time. */
1112
1113 static struct elf_metag_stub_hash_entry *
1114 metag_get_stub_entry (const asection *input_section,
1115 const asection *sym_sec,
1116 struct elf_metag_link_hash_entry *hh,
1117 const Elf_Internal_Rela *rel,
1118 struct elf_metag_link_hash_table *htab)
1119 {
1120 struct elf_metag_stub_hash_entry *hsh;
1121 const asection *id_sec;
1122
1123 /* If this input section is part of a group of sections sharing one
1124 stub section, then use the id of the first section in the group.
1125 Stub names need to include a section id, as there may well be
1126 more than one stub used to reach say, printf, and we need to
1127 distinguish between them. */
1128 id_sec = htab->stub_group[input_section->id].link_sec;
1129
1130 if (hh != NULL && hh->hsh_cache != NULL
1131 && hh->hsh_cache->hh == hh
1132 && hh->hsh_cache->id_sec == id_sec)
1133 {
1134 hsh = hh->hsh_cache;
1135 }
1136 else
1137 {
1138 char *stub_name;
1139
1140 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1141 if (stub_name == NULL)
1142 return NULL;
1143
1144 hsh = metag_stub_hash_lookup (&htab->bstab,
1145 stub_name, FALSE, FALSE);
1146
1147 if (hh != NULL)
1148 hh->hsh_cache = hsh;
1149
1150 free (stub_name);
1151 }
1152
1153 return hsh;
1154 }
1155
1156 /* Add a new stub entry to the stub hash. Not all fields of the new
1157 stub entry are initialised. */
1158
1159 static struct elf_metag_stub_hash_entry *
1160 metag_add_stub (const char *stub_name,
1161 asection *section,
1162 struct elf_metag_link_hash_table *htab)
1163 {
1164 asection *link_sec;
1165 asection *stub_sec;
1166 struct elf_metag_stub_hash_entry *hsh;
1167
1168 link_sec = htab->stub_group[section->id].link_sec;
1169 stub_sec = htab->stub_group[section->id].stub_sec;
1170 if (stub_sec == NULL)
1171 {
1172 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1173 if (stub_sec == NULL)
1174 {
1175 size_t namelen;
1176 bfd_size_type len;
1177 char *s_name;
1178
1179 namelen = strlen (link_sec->name);
1180 len = namelen + sizeof (STUB_SUFFIX);
1181 s_name = bfd_alloc (htab->stub_bfd, len);
1182 if (s_name == NULL)
1183 return NULL;
1184
1185 memcpy (s_name, link_sec->name, namelen);
1186 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1187
1188 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1189 if (stub_sec == NULL)
1190 return NULL;
1191 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1192 }
1193 htab->stub_group[section->id].stub_sec = stub_sec;
1194 }
1195
1196 /* Enter this entry into the linker stub hash table. */
1197 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1198 TRUE, FALSE);
1199 if (hsh == NULL)
1200 {
1201 /* xgettext:c-format */
1202 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1203 section->owner, stub_name);
1204 return NULL;
1205 }
1206
1207 hsh->stub_sec = stub_sec;
1208 hsh->stub_offset = 0;
1209 hsh->id_sec = link_sec;
1210 return hsh;
1211 }
1212
1213 /* Check a signed integer value can be represented in the given number
1214 of bits. */
1215
1216 static bfd_boolean
1217 within_signed_range (int value, unsigned int bits)
1218 {
1219 int min_val = -(1 << (bits - 1));
1220 int max_val = (1 << (bits - 1)) - 1;
1221 return (value <= max_val) && (value >= min_val);
1222 }
1223
1224 /* Perform a relocation as part of a final link. */
1225
1226 static bfd_reloc_status_type
1227 metag_final_link_relocate (reloc_howto_type *howto,
1228 bfd *input_bfd,
1229 asection *input_section,
1230 bfd_byte *contents,
1231 Elf_Internal_Rela *rel,
1232 bfd_vma relocation,
1233 struct elf_metag_link_hash_entry *hh,
1234 struct elf_metag_link_hash_table *htab,
1235 asection *sym_sec)
1236 {
1237 bfd_reloc_status_type r = bfd_reloc_ok;
1238 bfd_byte *hit_data = contents + rel->r_offset;
1239 int opcode, op_shift, op_extended, l1, l2;
1240 bfd_signed_vma srel, addend = rel->r_addend;
1241 struct elf_metag_stub_hash_entry *hsh = NULL;
1242 bfd_vma location;
1243
1244 /* Find out where we are and where we're going. */
1245 location = (rel->r_offset +
1246 input_section->output_offset +
1247 input_section->output_section->vma);
1248
1249 switch (howto->type)
1250 {
1251 case R_METAG_RELBRANCH:
1252 case R_METAG_RELBRANCH_PLT:
1253 /* Make it a pc relative offset. */
1254 relocation -= location;
1255 break;
1256 case R_METAG_TLS_GD:
1257 case R_METAG_TLS_IE:
1258 relocation -= elf_gp (input_section->output_section->owner);
1259 break;
1260 default:
1261 break;
1262 }
1263
1264 switch (howto->type)
1265 {
1266 case R_METAG_RELBRANCH_PLT:
1267 case R_METAG_RELBRANCH:
1268 opcode = bfd_get_32 (input_bfd, hit_data);
1269
1270 srel = (bfd_signed_vma) relocation;
1271 srel += addend;
1272
1273 /* If the branch is out of reach, then redirect the
1274 call to the local stub for this function. */
1275 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1276 (srel < - (1 << (BRANCH_BITS + 1))))
1277 {
1278 if (sym_sec == NULL)
1279 break;
1280
1281 hsh = metag_get_stub_entry (input_section, sym_sec,
1282 hh, rel, htab);
1283 if (hsh == NULL)
1284 return bfd_reloc_undefined;
1285
1286 /* Munge up the value and addend so that we call the stub
1287 rather than the procedure directly. */
1288 srel = (hsh->stub_offset
1289 + hsh->stub_sec->output_offset
1290 + hsh->stub_sec->output_section->vma);
1291 srel -= location;
1292 }
1293
1294 srel = srel >> 2;
1295
1296 if (!within_signed_range (srel, BRANCH_BITS))
1297 {
1298 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1299 srel = 0;
1300 else
1301 return bfd_reloc_overflow;
1302 }
1303
1304 opcode &= ~(0x7ffff << 5);
1305 opcode |= ((srel & 0x7ffff) << 5);
1306
1307 bfd_put_32 (input_bfd, opcode, hit_data);
1308 break;
1309 case R_METAG_GETSETOFF:
1310 case R_METAG_GETSET_GOT:
1311 case R_METAG_GETSET_GOTOFF:
1312 opcode = bfd_get_32 (input_bfd, hit_data);
1313
1314 srel = (bfd_signed_vma) relocation;
1315 srel += addend;
1316
1317 /* Is this a standard or extended GET/SET? */
1318 if ((opcode & 0xf0000000) == 0xa0000000)
1319 {
1320 /* Extended GET/SET. */
1321 l1 = opcode & 0x2;
1322 l2 = opcode & 0x4;
1323 op_extended = 1;
1324 }
1325 else
1326 {
1327 /* Standard GET/SET. */
1328 l1 = opcode & 0x01000000;
1329 l2 = opcode & 0x04000000;
1330 op_extended = 0;
1331 }
1332
1333 /* Calculate the width of the GET/SET and how much we need to
1334 shift the result by. */
1335 if (l2)
1336 if (l1)
1337 op_shift = 3;
1338 else
1339 op_shift = 2;
1340 else
1341 if (l1)
1342 op_shift = 1;
1343 else
1344 op_shift = 0;
1345
1346 /* GET/SET offsets are scaled by the width of the transfer. */
1347 srel = srel >> op_shift;
1348
1349 /* Extended GET/SET has signed 12 bits of offset, standard has
1350 signed 6 bits. */
1351 if (op_extended)
1352 {
1353 if (!within_signed_range (srel, 12))
1354 {
1355 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1356 srel = 0;
1357 else
1358 return bfd_reloc_overflow;
1359 }
1360 opcode &= ~(0xfff << 7);
1361 opcode |= ((srel & 0xfff) << 7);
1362 }
1363 else
1364 {
1365 if (!within_signed_range (srel, 5))
1366 {
1367 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1368 srel = 0;
1369 else
1370 return bfd_reloc_overflow;
1371 }
1372 opcode &= ~(0x3f << 8);
1373 opcode |= ((srel & 0x3f) << 8);
1374 }
1375
1376 bfd_put_32 (input_bfd, opcode, hit_data);
1377 break;
1378 case R_METAG_TLS_GD:
1379 case R_METAG_TLS_LDM:
1380 opcode = bfd_get_32 (input_bfd, hit_data);
1381
1382 if ((bfd_signed_vma)relocation < 0)
1383 {
1384 /* sign extend immediate */
1385 if ((opcode & 0xf2000001) == 0x02000000)
1386 {
1387 /* ADD De.e,Dx.r,#I16 */
1388 /* set SE bit */
1389 opcode |= (1 << 1);
1390 } else
1391 return bfd_reloc_overflow;
1392 }
1393
1394 bfd_put_32 (input_bfd, opcode, hit_data);
1395
1396 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1397 contents, rel->r_offset,
1398 relocation, rel->r_addend);
1399 break;
1400 default:
1401 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1402 contents, rel->r_offset,
1403 relocation, rel->r_addend);
1404 }
1405
1406 return r;
1407 }
1408
1409 /* This is defined because R_METAG_NONE != 0...
1410 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1411 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1412 rel, relend, howto, contents) \
1413 { \
1414 _bfd_clear_contents (howto, input_bfd, input_section, \
1415 contents + rel->r_offset); \
1416 \
1417 if (bfd_link_relocatable (info) \
1418 && (input_section->flags & SEC_DEBUGGING)) \
1419 { \
1420 /* Only remove relocations in debug sections since other \
1421 sections may require relocations. */ \
1422 Elf_Internal_Shdr *rel_hdr; \
1423 \
1424 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1425 \
1426 /* Avoid empty output section. */ \
1427 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1428 { \
1429 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1430 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1431 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1432 \
1433 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1434 \
1435 input_section->reloc_count--; \
1436 relend--; \
1437 rel--; \
1438 continue; \
1439 } \
1440 } \
1441 \
1442 rel->r_info = R_METAG_NONE; \
1443 rel->r_addend = 0; \
1444 continue; \
1445 }
1446
1447 /* Relocate a META ELF section.
1448
1449 The RELOCATE_SECTION function is called by the new ELF backend linker
1450 to handle the relocations for a section.
1451
1452 The relocs are always passed as Rela structures; if the section
1453 actually uses Rel structures, the r_addend field will always be
1454 zero.
1455
1456 This function is responsible for adjusting the section contents as
1457 necessary, and (if using Rela relocs and generating a relocatable
1458 output file) adjusting the reloc addend as necessary.
1459
1460 This function does not have to worry about setting the reloc
1461 address or the reloc symbol index.
1462
1463 LOCAL_SYMS is a pointer to the swapped in local symbols.
1464
1465 LOCAL_SECTIONS is an array giving the section in the input file
1466 corresponding to the st_shndx field of each local symbol.
1467
1468 The global hash table entry for the global symbols can be found
1469 via elf_sym_hashes (input_bfd).
1470
1471 When generating relocatable output, this function must handle
1472 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1473 going to be the section symbol corresponding to the output
1474 section, which means that the addend must be adjusted
1475 accordingly. */
1476
1477 static bfd_boolean
1478 elf_metag_relocate_section (bfd *output_bfd,
1479 struct bfd_link_info *info,
1480 bfd *input_bfd,
1481 asection *input_section,
1482 bfd_byte *contents,
1483 Elf_Internal_Rela *relocs,
1484 Elf_Internal_Sym *local_syms,
1485 asection **local_sections)
1486 {
1487 bfd_vma *local_got_offsets;
1488 Elf_Internal_Shdr *symtab_hdr;
1489 struct elf_link_hash_entry **eh_syms;
1490 struct elf_metag_link_hash_table *htab;
1491 Elf_Internal_Rela *rel;
1492 Elf_Internal_Rela *relend;
1493 asection *sreloc;
1494
1495 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1496 eh_syms = elf_sym_hashes (input_bfd);
1497 relend = relocs + input_section->reloc_count;
1498
1499 htab = metag_link_hash_table (info);
1500 local_got_offsets = elf_local_got_offsets (input_bfd);
1501
1502 sreloc = NULL;
1503
1504 for (rel = relocs; rel < relend; rel ++)
1505 {
1506 reloc_howto_type *howto;
1507 unsigned long r_symndx;
1508 Elf_Internal_Sym *sym;
1509 asection *sec;
1510 struct elf_metag_link_hash_entry *hh;
1511 bfd_vma relocation;
1512 bfd_reloc_status_type r;
1513 const char *name;
1514 int r_type;
1515
1516 r_type = ELF32_R_TYPE (rel->r_info);
1517
1518 if (r_type == R_METAG_GNU_VTINHERIT
1519 || r_type == R_METAG_GNU_VTENTRY
1520 || r_type == R_METAG_NONE)
1521 continue;
1522
1523 r_symndx = ELF32_R_SYM (rel->r_info);
1524
1525 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1526 hh = NULL;
1527 sym = NULL;
1528 sec = NULL;
1529
1530 if (r_symndx < symtab_hdr->sh_info)
1531 {
1532 sym = local_syms + r_symndx;
1533 sec = local_sections [r_symndx];
1534 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1535
1536 name = bfd_elf_string_from_elf_section
1537 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1538 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1539 }
1540 else
1541 {
1542 struct elf_link_hash_entry *eh;
1543 bfd_boolean unresolved_reloc, warned, ignored;
1544
1545 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1546 r_symndx, symtab_hdr, eh_syms,
1547 eh, sec, relocation,
1548 unresolved_reloc, warned, ignored);
1549
1550 name = eh->root.root.string;
1551 hh = (struct elf_metag_link_hash_entry *) eh;
1552 }
1553
1554 if (sec != NULL && discarded_section (sec))
1555 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1556 rel, relend, howto, contents);
1557
1558 if (bfd_link_relocatable (info))
1559 continue;
1560
1561 switch (r_type)
1562 {
1563 case R_METAG_ADDR32:
1564 case R_METAG_RELBRANCH:
1565 if ((input_section->flags & SEC_ALLOC) == 0)
1566 break;
1567
1568 if ((bfd_link_pic (info)
1569 && r_symndx != STN_UNDEF
1570 && (input_section->flags & SEC_ALLOC) != 0
1571 && (r_type != R_METAG_RELBRANCH
1572 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1573 || (!bfd_link_pic (info)
1574 && hh != NULL
1575 && hh->eh.dynindx != -1
1576 && !hh->eh.non_got_ref
1577 && ((hh->eh.def_dynamic
1578 && !hh->eh.def_regular)
1579 || hh->eh.root.type == bfd_link_hash_undefweak
1580 || hh->eh.root.type == bfd_link_hash_undefined)))
1581 {
1582 Elf_Internal_Rela outrel;
1583 bfd_boolean skip, relocate;
1584 bfd_byte *loc;
1585
1586 /* When generating a shared object, these relocations
1587 are copied into the output file to be resolved at run
1588 time. */
1589
1590 sreloc = elf_section_data (input_section)->sreloc;
1591 BFD_ASSERT (sreloc != NULL);
1592
1593 skip = FALSE;
1594 relocate = FALSE;
1595
1596 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1597 info,
1598 input_section,
1599 rel->r_offset);
1600 if (outrel.r_offset == (bfd_vma) -1)
1601 skip = TRUE;
1602 else if (outrel.r_offset == (bfd_vma) -2)
1603 skip = TRUE, relocate = TRUE;
1604 outrel.r_offset += (input_section->output_section->vma
1605 + input_section->output_offset);
1606
1607 if (skip)
1608 {
1609 memset (&outrel, 0, sizeof outrel);
1610 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1611 }
1612 else if (r_type == R_METAG_RELBRANCH)
1613 {
1614 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1615 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1616 outrel.r_addend = rel->r_addend;
1617 }
1618 else
1619 {
1620 /* h->dynindx may be -1 if this symbol was marked to
1621 become local. */
1622 if (hh == NULL
1623 || ((info->symbolic || hh->eh.dynindx == -1)
1624 && hh->eh.def_regular))
1625 {
1626 relocate = TRUE;
1627 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1628 outrel.r_addend = relocation + rel->r_addend;
1629 }
1630 else
1631 {
1632 BFD_ASSERT (hh->eh.dynindx != -1);
1633 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1634 outrel.r_addend = rel->r_addend;
1635 }
1636 }
1637
1638 loc = sreloc->contents;
1639 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1640 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1641 ++sreloc->reloc_count;
1642
1643 /* If this reloc is against an external symbol, we do
1644 not want to fiddle with the addend. Otherwise, we
1645 need to include the symbol value so that it becomes
1646 an addend for the dynamic reloc. */
1647 if (! relocate)
1648 continue;
1649 }
1650 break;
1651
1652 case R_METAG_RELBRANCH_PLT:
1653 /* Relocation is to the entry for this symbol in the
1654 procedure linkage table. */
1655
1656 if (hh == NULL)
1657 break;
1658
1659 if (hh->eh.forced_local)
1660 break;
1661
1662 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
1663 {
1664 /* We didn't make a PLT entry for this symbol. This
1665 happens when statically linking PIC code, or when
1666 using -Bsymbolic. */
1667 break;
1668 }
1669
1670 relocation = (htab->etab.splt->output_section->vma
1671 + htab->etab.splt->output_offset
1672 + hh->eh.plt.offset);
1673 break;
1674 case R_METAG_HI16_GOTPC:
1675 case R_METAG_LO16_GOTPC:
1676 BFD_ASSERT (htab->etab.sgot != NULL);
1677
1678 relocation = (htab->etab.sgot->output_section->vma +
1679 htab->etab.sgot->output_offset);
1680 relocation += GOT_REG_OFFSET;
1681 relocation -= (input_section->output_section->vma
1682 + input_section->output_offset
1683 + rel->r_offset);
1684 break;
1685 case R_METAG_HI16_GOTOFF:
1686 case R_METAG_LO16_GOTOFF:
1687 case R_METAG_GETSET_GOTOFF:
1688 BFD_ASSERT (htab->etab.sgot != NULL);
1689
1690 relocation -= (htab->etab.sgot->output_section->vma +
1691 htab->etab.sgot->output_offset);
1692 relocation -= GOT_REG_OFFSET;
1693 break;
1694 case R_METAG_GETSET_GOT:
1695 {
1696 bfd_vma off;
1697 bfd_boolean do_got = 0;
1698
1699 /* Relocation is to the entry for this symbol in the
1700 global offset table. */
1701 if (hh != NULL)
1702 {
1703 bfd_boolean dyn;
1704
1705 off = hh->eh.got.offset;
1706 dyn = htab->etab.dynamic_sections_created;
1707 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1708 bfd_link_pic (info),
1709 &hh->eh))
1710 {
1711 /* If we aren't going to call finish_dynamic_symbol,
1712 then we need to handle initialisation of the .got
1713 entry and create needed relocs here. Since the
1714 offset must always be a multiple of 4, we use the
1715 least significant bit to record whether we have
1716 initialised it already. */
1717 if ((off & 1) != 0)
1718 off &= ~1;
1719 else
1720 {
1721 hh->eh.got.offset |= 1;
1722 do_got = 1;
1723 }
1724 }
1725 }
1726 else
1727 {
1728 /* Local symbol case. */
1729 if (local_got_offsets == NULL)
1730 abort ();
1731
1732 off = local_got_offsets[r_symndx];
1733
1734 /* The offset must always be a multiple of 4. We use
1735 the least significant bit to record whether we have
1736 already generated the necessary reloc. */
1737 if ((off & 1) != 0)
1738 off &= ~1;
1739 else
1740 {
1741 local_got_offsets[r_symndx] |= 1;
1742 do_got = 1;
1743 }
1744 }
1745
1746 if (do_got)
1747 {
1748 if (bfd_link_pic (info))
1749 {
1750 /* Output a dynamic relocation for this GOT entry.
1751 In this case it is relative to the base of the
1752 object because the symbol index is zero. */
1753 Elf_Internal_Rela outrel;
1754 bfd_byte *loc;
1755 asection *s = htab->etab.srelgot;
1756
1757 outrel.r_offset = (off
1758 + htab->etab.sgot->output_offset
1759 + htab->etab.sgot->output_section->vma);
1760 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1761 outrel.r_addend = relocation;
1762 loc = s->contents;
1763 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1764 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1765 }
1766 else
1767 bfd_put_32 (output_bfd, relocation,
1768 htab->etab.sgot->contents + off);
1769 }
1770
1771 if (off >= (bfd_vma) -2)
1772 abort ();
1773
1774 relocation = off - GOT_REG_OFFSET;
1775 }
1776 break;
1777 case R_METAG_TLS_GD:
1778 case R_METAG_TLS_IE:
1779 {
1780 /* XXXMJF There is room here for optimisations. For example
1781 converting from GD->IE, etc. */
1782 bfd_vma off;
1783 int indx;
1784 char tls_type;
1785
1786 if (htab->etab.sgot == NULL)
1787 abort();
1788
1789 indx = 0;
1790 if (hh != NULL)
1791 {
1792 bfd_boolean dyn;
1793 dyn = htab->etab.dynamic_sections_created;
1794
1795 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1796 bfd_link_pic (info),
1797 &hh->eh)
1798 && (!bfd_link_pic (info)
1799 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1800 {
1801 indx = hh->eh.dynindx;
1802 }
1803 off = hh->eh.got.offset;
1804 tls_type = hh->tls_type;
1805 }
1806 else
1807 {
1808 /* Local symbol case. */
1809 if (local_got_offsets == NULL)
1810 abort ();
1811
1812 off = local_got_offsets[r_symndx];
1813 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1814 }
1815
1816 if (tls_type == GOT_UNKNOWN)
1817 abort ();
1818
1819 if ((off & 1) != 0)
1820 off &= ~1;
1821 else
1822 {
1823 bfd_boolean need_relocs = FALSE;
1824 Elf_Internal_Rela outrel;
1825 bfd_byte *loc = NULL;
1826 int cur_off = off;
1827
1828 /* The GOT entries have not been initialized yet. Do it
1829 now, and emit any relocations. If both an IE GOT and a
1830 GD GOT are necessary, we emit the GD first. */
1831
1832 if ((bfd_link_pic (info) || indx != 0)
1833 && (hh == NULL
1834 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1835 || hh->eh.root.type != bfd_link_hash_undefweak))
1836 {
1837 need_relocs = TRUE;
1838 loc = htab->etab.srelgot->contents;
1839 /* FIXME (CAO): Should this be reloc_count++ ? */
1840 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
1841 }
1842
1843 if (tls_type & GOT_TLS_GD)
1844 {
1845 if (need_relocs)
1846 {
1847 outrel.r_offset = (cur_off
1848 + htab->etab.sgot->output_section->vma
1849 + htab->etab.sgot->output_offset);
1850 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1851 outrel.r_addend = 0;
1852 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
1853
1854 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1855 htab->etab.srelgot->reloc_count++;
1856 loc += sizeof (Elf32_External_Rela);
1857
1858 if (indx == 0)
1859 bfd_put_32 (output_bfd, 0,
1860 htab->etab.sgot->contents + cur_off + 4);
1861 else
1862 {
1863 bfd_put_32 (output_bfd, 0,
1864 htab->etab.sgot->contents + cur_off + 4);
1865 outrel.r_info = ELF32_R_INFO (indx,
1866 R_METAG_TLS_DTPOFF);
1867 outrel.r_offset += 4;
1868 bfd_elf32_swap_reloca_out (output_bfd,
1869 &outrel, loc);
1870 htab->etab.srelgot->reloc_count++;
1871 loc += sizeof (Elf32_External_Rela);
1872 }
1873 }
1874 else
1875 {
1876 /* We don't support changing the TLS model. */
1877 /* PR 20675 */
1878 if (bfd_link_pic (info))
1879 _bfd_error_handler (_("%B(%A): multiple TLS models are not supported"),
1880 input_bfd, input_section, name);
1881 else
1882 _bfd_error_handler (_("%B(%A): shared library symbol %s encountered whilst performing a static link"),
1883 input_bfd, input_section, name);
1884 return FALSE;
1885 }
1886
1887 cur_off += 8;
1888 }
1889
1890 if (tls_type & GOT_TLS_IE)
1891 {
1892 if (need_relocs)
1893 {
1894 outrel.r_offset = (cur_off
1895 + htab->etab.sgot->output_section->vma
1896 + htab->etab.sgot->output_offset);
1897 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1898
1899 if (indx == 0)
1900 outrel.r_addend = relocation - dtpoff_base (info);
1901 else
1902 outrel.r_addend = 0;
1903
1904 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1905 htab->etab.srelgot->reloc_count++;
1906 loc += sizeof (Elf32_External_Rela);
1907 }
1908 else
1909 bfd_put_32 (output_bfd, tpoff (info, relocation),
1910 htab->etab.sgot->contents + cur_off);
1911
1912 cur_off += 4;
1913 }
1914
1915 if (hh != NULL)
1916 hh->eh.got.offset |= 1;
1917 else
1918 local_got_offsets[r_symndx] |= 1;
1919 }
1920
1921 /* Add the base of the GOT to the relocation value. */
1922 relocation = off - GOT_REG_OFFSET;
1923
1924 break;
1925 }
1926
1927 case R_METAG_TLS_IENONPIC_HI16:
1928 case R_METAG_TLS_IENONPIC_LO16:
1929 case R_METAG_TLS_LE_HI16:
1930 case R_METAG_TLS_LE_LO16:
1931 if (bfd_link_pic (info))
1932 {
1933 _bfd_error_handler
1934 /* xgettext:c-format */
1935 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1936 input_bfd, input_section,
1937 (long) rel->r_offset, howto->name);
1938 return FALSE;
1939 }
1940 else
1941 relocation = tpoff (info, relocation);
1942 break;
1943 case R_METAG_TLS_LDO_HI16:
1944 case R_METAG_TLS_LDO_LO16:
1945 if (! bfd_link_pic (info))
1946 relocation = tpoff (info, relocation);
1947 else
1948 relocation -= dtpoff_base (info);
1949 break;
1950 case R_METAG_TLS_LDM:
1951 {
1952 bfd_vma off;
1953
1954 if (htab->etab.sgot == NULL)
1955 abort();
1956 off = htab->tls_ldm_got.offset;
1957 if (off & 1)
1958 off &= ~1;
1959 else
1960 {
1961 Elf_Internal_Rela outrel;
1962 bfd_byte *loc;
1963
1964 outrel.r_offset = (off
1965 + htab->etab.sgot->output_section->vma
1966 + htab->etab.sgot->output_offset);
1967
1968 outrel.r_addend = 0;
1969 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1970 loc = htab->etab.srelgot->contents;
1971 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1972 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1973 htab->tls_ldm_got.offset |= 1;
1974 }
1975
1976 relocation = off - GOT_REG_OFFSET;
1977 break;
1978 }
1979 default:
1980 break;
1981 }
1982
1983 r = metag_final_link_relocate (howto, input_bfd, input_section,
1984 contents, rel, relocation, hh, htab,
1985 sec);
1986
1987 if (r != bfd_reloc_ok)
1988 {
1989 const char * msg = (const char *) NULL;
1990
1991 switch (r)
1992 {
1993 case bfd_reloc_overflow:
1994 (*info->callbacks->reloc_overflow)
1995 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1996 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1997 break;
1998
1999 case bfd_reloc_undefined:
2000 (*info->callbacks->undefined_symbol)
2001 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
2002 break;
2003
2004 case bfd_reloc_outofrange:
2005 msg = _("internal error: out of range error");
2006 break;
2007
2008 case bfd_reloc_notsupported:
2009 msg = _("internal error: unsupported relocation error");
2010 break;
2011
2012 case bfd_reloc_dangerous:
2013 msg = _("internal error: dangerous relocation");
2014 break;
2015
2016 default:
2017 msg = _("internal error: unknown error");
2018 break;
2019 }
2020
2021 if (msg)
2022 (*info->callbacks->warning) (info, msg, name, input_bfd,
2023 input_section, rel->r_offset);
2024 }
2025 }
2026
2027 return TRUE;
2028 }
2029
2030 /* Create the .plt and .got sections, and set up our hash table
2031 short-cuts to various dynamic sections. */
2032
2033 static bfd_boolean
2034 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2035 {
2036 struct elf_metag_link_hash_table *htab;
2037 struct elf_link_hash_entry *eh;
2038 struct bfd_link_hash_entry *bh;
2039 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2040
2041 /* Don't try to create the .plt and .got twice. */
2042 htab = metag_link_hash_table (info);
2043 if (htab->etab.splt != NULL)
2044 return TRUE;
2045
2046 /* Call the generic code to do most of the work. */
2047 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2048 return FALSE;
2049
2050 /* The header goes at the start of the dynamic .got section, which
2051 is placed after the dynamic .got.plt section. ie. The header is
2052 not necessarily at the start of the output .got section. */
2053 htab->etab.sgot->size += 12;
2054
2055 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
2056 bh = NULL;
2057 if (!(_bfd_generic_link_add_one_symbol
2058 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot,
2059 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2060 return FALSE;
2061 eh = (struct elf_link_hash_entry *) bh;
2062 eh->def_regular = 1;
2063 eh->type = STT_OBJECT;
2064 eh->other = STV_HIDDEN;
2065
2066 if (! bfd_link_executable (info)
2067 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2068 return FALSE;
2069
2070 htab->etab.hgot = eh;
2071
2072 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
2073 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
2074
2075 return TRUE;
2076 }
2077
2078 /* Look through the relocs for a section during the first phase, and
2079 calculate needed space in the global offset table, procedure linkage
2080 table, and dynamic reloc sections. At this point we haven't
2081 necessarily read all the input files. */
2082
2083 static bfd_boolean
2084 elf_metag_check_relocs (bfd *abfd,
2085 struct bfd_link_info *info,
2086 asection *sec,
2087 const Elf_Internal_Rela *relocs)
2088 {
2089 Elf_Internal_Shdr *symtab_hdr;
2090 struct elf_link_hash_entry **eh_syms;
2091 const Elf_Internal_Rela *rel;
2092 const Elf_Internal_Rela *rel_end;
2093 struct elf_metag_link_hash_table *htab;
2094 asection *sreloc;
2095 bfd *dynobj;
2096 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2097
2098 if (bfd_link_relocatable (info))
2099 return TRUE;
2100
2101 htab = metag_link_hash_table (info);
2102 dynobj = htab->etab.dynobj;
2103 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2104 eh_syms = elf_sym_hashes (abfd);
2105 sreloc = NULL;
2106
2107 if (htab == NULL)
2108 return FALSE;
2109
2110 rel_end = relocs + sec->reloc_count;
2111 for (rel = relocs; rel < rel_end; rel++)
2112 {
2113 int r_type;
2114 struct elf_metag_link_hash_entry *hh;
2115 Elf_Internal_Sym *isym;
2116 unsigned long r_symndx;
2117
2118 r_symndx = ELF32_R_SYM (rel->r_info);
2119 r_type = ELF32_R_TYPE (rel->r_info);
2120 if (r_symndx < symtab_hdr->sh_info)
2121 {
2122 /* A local symbol. */
2123 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2124 abfd, r_symndx);
2125 if (isym == NULL)
2126 return FALSE;
2127
2128 hh = NULL;
2129 }
2130 else
2131 {
2132 isym = NULL;
2133
2134 hh = (struct elf_metag_link_hash_entry *)
2135 eh_syms[r_symndx - symtab_hdr->sh_info];
2136 while (hh->eh.root.type == bfd_link_hash_indirect
2137 || hh->eh.root.type == bfd_link_hash_warning)
2138 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2139
2140 /* PR15323, ref flags aren't set for references in the same
2141 object. */
2142 hh->eh.root.non_ir_ref = 1;
2143 }
2144
2145 /* Some relocs require a global offset table. */
2146 if (htab->etab.sgot == NULL)
2147 {
2148 switch (r_type)
2149 {
2150 case R_METAG_TLS_GD:
2151 case R_METAG_TLS_LDM:
2152 case R_METAG_TLS_IE:
2153 if (bfd_link_pic (info))
2154 info->flags |= DF_STATIC_TLS;
2155 /* Fall through. */
2156
2157 case R_METAG_HI16_GOTOFF:
2158 case R_METAG_LO16_GOTOFF:
2159 case R_METAG_GETSET_GOTOFF:
2160 case R_METAG_GETSET_GOT:
2161 case R_METAG_HI16_GOTPC:
2162 case R_METAG_LO16_GOTPC:
2163 if (dynobj == NULL)
2164 htab->etab.dynobj = dynobj = abfd;
2165 if (!elf_metag_create_dynamic_sections (dynobj, info))
2166 return FALSE;
2167 break;
2168
2169 default:
2170 break;
2171 }
2172 }
2173
2174 switch (r_type)
2175 {
2176 case R_METAG_TLS_IE:
2177 case R_METAG_TLS_GD:
2178 case R_METAG_GETSET_GOT:
2179 switch (r_type)
2180 {
2181 default:
2182 tls_type = GOT_NORMAL;
2183 break;
2184 case R_METAG_TLS_IE:
2185 tls_type = GOT_TLS_IE;
2186 break;
2187 case R_METAG_TLS_GD:
2188 tls_type = GOT_TLS_GD;
2189 break;
2190 }
2191
2192 if (hh != NULL)
2193 {
2194 hh->eh.got.refcount += 1;
2195 old_tls_type = hh->tls_type;
2196 }
2197 else
2198 {
2199 bfd_signed_vma *local_got_refcounts;
2200
2201 /* This is a global offset table entry for a local
2202 symbol. */
2203 local_got_refcounts = elf_local_got_refcounts (abfd);
2204 if (local_got_refcounts == NULL)
2205 {
2206 bfd_size_type size;
2207
2208 size = symtab_hdr->sh_info;
2209 size *= sizeof (bfd_signed_vma);
2210 /* Add in space to store the local GOT TLS types. */
2211 size += symtab_hdr->sh_info;
2212 local_got_refcounts = ((bfd_signed_vma *)
2213 bfd_zalloc (abfd, size));
2214 if (local_got_refcounts == NULL)
2215 return FALSE;
2216 elf_local_got_refcounts (abfd) = local_got_refcounts;
2217 memset (metag_elf_local_got_tls_type (abfd),
2218 GOT_UNKNOWN, symtab_hdr->sh_info);
2219 }
2220 local_got_refcounts[r_symndx] += 1;
2221 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2222 }
2223
2224 if (old_tls_type != tls_type)
2225 {
2226 if (hh != NULL)
2227 {
2228 hh->tls_type = tls_type;
2229 }
2230 else
2231 {
2232 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2233 }
2234 }
2235
2236 break;
2237
2238 case R_METAG_TLS_LDM:
2239 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2240 break;
2241
2242 case R_METAG_RELBRANCH_PLT:
2243 /* This symbol requires a procedure linkage table entry. We
2244 actually build the entry in adjust_dynamic_symbol,
2245 because this might be a case of linking PIC code without
2246 linking in any dynamic objects, in which case we don't
2247 need to generate a procedure linkage table after all. */
2248
2249 /* If this is a local symbol, we resolve it directly without
2250 creating a procedure linkage table entry. */
2251 if (hh == NULL)
2252 continue;
2253
2254 if (hh->eh.forced_local)
2255 break;
2256
2257 hh->eh.needs_plt = 1;
2258 hh->eh.plt.refcount += 1;
2259 break;
2260
2261 case R_METAG_HIADDR16:
2262 case R_METAG_LOADDR16:
2263 /* Let's help debug shared library creation. These relocs
2264 cannot be used in shared libs. Don't error out for
2265 sections we don't care about, such as debug sections or
2266 non-constant sections. */
2267 if (bfd_link_pic (info)
2268 && (sec->flags & SEC_ALLOC) != 0
2269 && (sec->flags & SEC_READONLY) != 0)
2270 {
2271 const char *name;
2272
2273 if (hh)
2274 name = hh->eh.root.root.string;
2275 else
2276 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2277 _bfd_error_handler
2278 /* xgettext:c-format */
2279 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2280 abfd, elf_metag_howto_table[r_type].name, name);
2281 bfd_set_error (bfd_error_bad_value);
2282 return FALSE;
2283 }
2284
2285 /* Fall through. */
2286 case R_METAG_ADDR32:
2287 case R_METAG_RELBRANCH:
2288 case R_METAG_GETSETOFF:
2289 if (hh != NULL && !bfd_link_pic (info))
2290 {
2291 hh->eh.non_got_ref = 1;
2292 hh->eh.plt.refcount += 1;
2293 }
2294
2295 /* If we are creating a shared library, and this is a reloc
2296 against a global symbol, or a non PC relative reloc
2297 against a local symbol, then we need to copy the reloc
2298 into the shared library. However, if we are linking with
2299 -Bsymbolic, we do not need to copy a reloc against a
2300 global symbol which is defined in an object we are
2301 including in the link (i.e., DEF_REGULAR is set). At
2302 this point we have not seen all the input files, so it is
2303 possible that DEF_REGULAR is not set now but will be set
2304 later (it is never cleared). We account for that
2305 possibility below by storing information in the
2306 dyn_relocs field of the hash table entry. A similar
2307 situation occurs when creating shared libraries and symbol
2308 visibility changes render the symbol local.
2309
2310 If on the other hand, we are creating an executable, we
2311 may need to keep relocations for symbols satisfied by a
2312 dynamic library if we manage to avoid copy relocs for the
2313 symbol. */
2314 if ((bfd_link_pic (info)
2315 && (sec->flags & SEC_ALLOC) != 0
2316 && (r_type != R_METAG_RELBRANCH
2317 || (hh != NULL
2318 && (! info->symbolic
2319 || hh->eh.root.type == bfd_link_hash_defweak
2320 || !hh->eh.def_regular))))
2321 || (!bfd_link_pic (info)
2322 && (sec->flags & SEC_ALLOC) != 0
2323 && hh != NULL
2324 && (hh->eh.root.type == bfd_link_hash_defweak
2325 || !hh->eh.def_regular)))
2326 {
2327 struct elf_metag_dyn_reloc_entry *hdh_p;
2328 struct elf_metag_dyn_reloc_entry **hdh_head;
2329
2330 if (dynobj == NULL)
2331 htab->etab.dynobj = dynobj = abfd;
2332
2333 /* When creating a shared object, we must copy these
2334 relocs into the output file. We create a reloc
2335 section in dynobj and make room for the reloc. */
2336 if (sreloc == NULL)
2337 {
2338 sreloc = _bfd_elf_make_dynamic_reloc_section
2339 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2340
2341 if (sreloc == NULL)
2342 {
2343 bfd_set_error (bfd_error_bad_value);
2344 return FALSE;
2345 }
2346
2347 elf_section_data (sec)->sreloc = sreloc;
2348 }
2349
2350 /* If this is a global symbol, we count the number of
2351 relocations we need for this symbol. */
2352 if (hh != NULL)
2353 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2354 else
2355 {
2356 /* Track dynamic relocs needed for local syms too. */
2357 asection *sr;
2358 void *vpp;
2359
2360 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2361 if (sr == NULL)
2362 sr = sec;
2363
2364 vpp = &elf_section_data (sr)->local_dynrel;
2365 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2366 }
2367
2368 hdh_p = *hdh_head;
2369 if (hdh_p == NULL || hdh_p->sec != sec)
2370 {
2371 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2372 bfd_alloc (dynobj, sizeof *hdh_p));
2373 if (hdh_p == NULL)
2374 return FALSE;
2375 hdh_p->hdh_next = *hdh_head;
2376 *hdh_head = hdh_p;
2377 hdh_p->sec = sec;
2378 hdh_p->count = 0;
2379 hdh_p->relative_count = 0;
2380 }
2381
2382 hdh_p->count += 1;
2383 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2384 hdh_p->relative_count += 1;
2385 }
2386 break;
2387
2388 /* This relocation describes the C++ object vtable hierarchy.
2389 Reconstruct it for later use during GC. */
2390 case R_METAG_GNU_VTINHERIT:
2391 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2392 rel->r_offset))
2393 return FALSE;
2394 break;
2395
2396 /* This relocation describes which C++ vtable entries are actually
2397 used. Record for later use during GC. */
2398 case R_METAG_GNU_VTENTRY:
2399 BFD_ASSERT (hh != NULL);
2400 if (hh != NULL
2401 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2402 return FALSE;
2403 break;
2404 }
2405 }
2406
2407 return TRUE;
2408 }
2409
2410 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2411
2412 static void
2413 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2414 struct elf_link_hash_entry *eh_dir,
2415 struct elf_link_hash_entry *eh_ind)
2416 {
2417 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2418
2419 hh_dir = metag_elf_hash_entry (eh_dir);
2420 hh_ind = metag_elf_hash_entry (eh_ind);
2421
2422 if (hh_ind->dyn_relocs != NULL)
2423 {
2424 if (hh_dir->dyn_relocs != NULL)
2425 {
2426 struct elf_metag_dyn_reloc_entry **hdh_pp;
2427 struct elf_metag_dyn_reloc_entry *hdh_p;
2428
2429 if (eh_ind->root.type == bfd_link_hash_indirect)
2430 abort ();
2431
2432 /* Add reloc counts against the weak sym to the strong sym
2433 list. Merge any entries against the same section. */
2434 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2435 {
2436 struct elf_metag_dyn_reloc_entry *hdh_q;
2437
2438 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2439 hdh_q = hdh_q->hdh_next)
2440 if (hdh_q->sec == hdh_p->sec)
2441 {
2442 hdh_q->relative_count += hdh_p->relative_count;
2443 hdh_q->count += hdh_p->count;
2444 *hdh_pp = hdh_p->hdh_next;
2445 break;
2446 }
2447 if (hdh_q == NULL)
2448 hdh_pp = &hdh_p->hdh_next;
2449 }
2450 *hdh_pp = hh_dir->dyn_relocs;
2451 }
2452
2453 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2454 hh_ind->dyn_relocs = NULL;
2455 }
2456
2457 if (eh_ind->root.type == bfd_link_hash_indirect
2458 && eh_dir->got.refcount <= 0)
2459 {
2460 hh_dir->tls_type = hh_ind->tls_type;
2461 hh_ind->tls_type = GOT_UNKNOWN;
2462 }
2463
2464 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2465 }
2466
2467 /* Adjust a symbol defined by a dynamic object and referenced by a
2468 regular object. The current definition is in some section of the
2469 dynamic object, but we're not including those sections. We have to
2470 change the definition to something the rest of the link can
2471 understand. */
2472
2473 static bfd_boolean
2474 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2475 struct elf_link_hash_entry *eh)
2476 {
2477 struct elf_metag_link_hash_table *htab;
2478 struct elf_metag_link_hash_entry *hh;
2479 struct elf_metag_dyn_reloc_entry *hdh_p;
2480 asection *s;
2481
2482 /* If this is a function, put it in the procedure linkage table. We
2483 will fill in the contents of the procedure linkage table later,
2484 when we know the address of the .got section. */
2485 if (eh->type == STT_FUNC
2486 || eh->needs_plt)
2487 {
2488 if (eh->plt.refcount <= 0
2489 || SYMBOL_CALLS_LOCAL (info, eh)
2490 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2491 && eh->root.type == bfd_link_hash_undefweak))
2492 {
2493 /* This case can occur if we saw a PLT reloc in an input
2494 file, but the symbol was never referred to by a dynamic
2495 object. In such a case, we don't actually need to build
2496 a procedure linkage table, and we can just do a PCREL
2497 reloc instead. */
2498 eh->plt.offset = (bfd_vma) -1;
2499 eh->needs_plt = 0;
2500 }
2501
2502 return TRUE;
2503 }
2504 else
2505 eh->plt.offset = (bfd_vma) -1;
2506
2507 /* If this is a weak symbol, and there is a real definition, the
2508 processor independent code will have arranged for us to see the
2509 real definition first, and we can just use the same value. */
2510 if (eh->u.weakdef != NULL)
2511 {
2512 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2513 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2514 abort ();
2515 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2516 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2517 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2518 return TRUE;
2519 }
2520
2521 /* This is a reference to a symbol defined by a dynamic object which
2522 is not a function. */
2523
2524 /* If we are creating a shared library, we must presume that the
2525 only references to the symbol are via the global offset table.
2526 For such cases we need not do anything here; the relocations will
2527 be handled correctly by relocate_section. */
2528 if (bfd_link_pic (info))
2529 return TRUE;
2530
2531 /* If there are no references to this symbol that do not use the
2532 GOT, we don't need to generate a copy reloc. */
2533 if (!eh->non_got_ref)
2534 return TRUE;
2535
2536 /* If -z nocopyreloc was given, we won't generate them either. */
2537 if (info->nocopyreloc)
2538 {
2539 eh->non_got_ref = 0;
2540 return TRUE;
2541 }
2542
2543 hh = (struct elf_metag_link_hash_entry *) eh;
2544 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2545 {
2546 s = hdh_p->sec->output_section;
2547 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2548 break;
2549 }
2550
2551 /* If we didn't find any dynamic relocs in read-only sections, then
2552 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2553 if (hdh_p == NULL)
2554 {
2555 eh->non_got_ref = 0;
2556 return TRUE;
2557 }
2558
2559 /* We must allocate the symbol in our .dynbss section, which will
2560 become part of the .bss section of the executable. There will be
2561 an entry for this symbol in the .dynsym section. The dynamic
2562 object will contain position independent code, so all references
2563 from the dynamic object to this symbol will go through the global
2564 offset table. The dynamic linker will use the .dynsym entry to
2565 determine the address it must put in the global offset table, so
2566 both the dynamic object and the regular object will refer to the
2567 same memory location for the variable. */
2568
2569 htab = metag_link_hash_table (info);
2570
2571 /* We must generate a COPY reloc to tell the dynamic linker to
2572 copy the initial value out of the dynamic object and into the
2573 runtime process image. */
2574 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2575 {
2576 htab->srelbss->size += sizeof (Elf32_External_Rela);
2577 eh->needs_copy = 1;
2578 }
2579
2580 s = htab->sdynbss;
2581
2582 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
2583 }
2584
2585 /* Allocate space in .plt, .got and associated reloc sections for
2586 global syms. */
2587
2588 static bfd_boolean
2589 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2590 {
2591 struct bfd_link_info *info;
2592 struct elf_metag_link_hash_table *htab;
2593 struct elf_metag_link_hash_entry *hh;
2594 struct elf_metag_dyn_reloc_entry *hdh_p;
2595
2596 if (eh->root.type == bfd_link_hash_indirect)
2597 return TRUE;
2598
2599 if (eh->root.type == bfd_link_hash_warning)
2600 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2601
2602 info = inf;
2603 htab = metag_link_hash_table (info);
2604
2605 if (htab->etab.dynamic_sections_created
2606 && eh->plt.refcount > 0)
2607 {
2608 /* Make sure this symbol is output as a dynamic symbol.
2609 Undefined weak syms won't yet be marked as dynamic. */
2610 if (eh->dynindx == -1
2611 && !eh->forced_local)
2612 {
2613 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2614 return FALSE;
2615 }
2616
2617 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
2618 {
2619 asection *s = htab->etab.splt;
2620
2621 /* If this is the first .plt entry, make room for the special
2622 first entry. */
2623 if (s->size == 0)
2624 s->size += PLT_ENTRY_SIZE;
2625
2626 eh->plt.offset = s->size;
2627
2628 /* If this symbol is not defined in a regular file, and we are
2629 not generating a shared library, then set the symbol to this
2630 location in the .plt. This is required to make function
2631 pointers compare as equal between the normal executable and
2632 the shared library. */
2633 if (! bfd_link_pic (info)
2634 && !eh->def_regular)
2635 {
2636 eh->root.u.def.section = s;
2637 eh->root.u.def.value = eh->plt.offset;
2638 }
2639
2640 /* Make room for this entry. */
2641 s->size += PLT_ENTRY_SIZE;
2642
2643 /* We also need to make an entry in the .got.plt section, which
2644 will be placed in the .got section by the linker script. */
2645 htab->etab.sgotplt->size += 4;
2646
2647 /* We also need to make an entry in the .rel.plt section. */
2648 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
2649 }
2650 else
2651 {
2652 eh->plt.offset = (bfd_vma) -1;
2653 eh->needs_plt = 0;
2654 }
2655 }
2656 else
2657 {
2658 eh->plt.offset = (bfd_vma) -1;
2659 eh->needs_plt = 0;
2660 }
2661
2662 if (eh->got.refcount > 0)
2663 {
2664 asection *s;
2665 bfd_boolean dyn;
2666 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2667
2668 /* Make sure this symbol is output as a dynamic symbol.
2669 Undefined weak syms won't yet be marked as dynamic. */
2670 if (eh->dynindx == -1
2671 && !eh->forced_local)
2672 {
2673 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2674 return FALSE;
2675 }
2676
2677 s = htab->etab.sgot;
2678
2679 eh->got.offset = s->size;
2680 s->size += 4;
2681 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2682 if (tls_type == GOT_TLS_GD)
2683 s->size += 4;
2684 dyn = htab->etab.dynamic_sections_created;
2685 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2686 R_METAG_TLS_GD needs one if local symbol and two if global. */
2687 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2688 || (tls_type == GOT_TLS_IE && dyn))
2689 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2690 else if (tls_type == GOT_TLS_GD)
2691 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
2692 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2693 bfd_link_pic (info),
2694 eh))
2695 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2696 }
2697 else
2698 eh->got.offset = (bfd_vma) -1;
2699
2700 hh = (struct elf_metag_link_hash_entry *) eh;
2701 if (hh->dyn_relocs == NULL)
2702 return TRUE;
2703
2704 /* If this is a -Bsymbolic shared link, then we need to discard all
2705 space allocated for dynamic pc-relative relocs against symbols
2706 defined in a regular object. For the normal shared case, discard
2707 space for relocs that have become local due to symbol visibility
2708 changes. */
2709 if (bfd_link_pic (info))
2710 {
2711 if (SYMBOL_CALLS_LOCAL (info, eh))
2712 {
2713 struct elf_metag_dyn_reloc_entry **hdh_pp;
2714
2715 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2716 {
2717 hdh_p->count -= hdh_p->relative_count;
2718 hdh_p->relative_count = 0;
2719 if (hdh_p->count == 0)
2720 *hdh_pp = hdh_p->hdh_next;
2721 else
2722 hdh_pp = &hdh_p->hdh_next;
2723 }
2724 }
2725
2726 /* Also discard relocs on undefined weak syms with non-default
2727 visibility. */
2728 if (hh->dyn_relocs != NULL
2729 && eh->root.type == bfd_link_hash_undefweak)
2730 {
2731 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2732 hh->dyn_relocs = NULL;
2733
2734 /* Make sure undefined weak symbols are output as a dynamic
2735 symbol in PIEs. */
2736 else if (eh->dynindx == -1
2737 && !eh->forced_local)
2738 {
2739 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2740 return FALSE;
2741 }
2742 }
2743 }
2744 else
2745 {
2746 /* For the non-shared case, discard space for relocs against
2747 symbols which turn out to need copy relocs or are not
2748 dynamic. */
2749 if (!eh->non_got_ref
2750 && ((eh->def_dynamic
2751 && !eh->def_regular)
2752 || (htab->etab.dynamic_sections_created
2753 && (eh->root.type == bfd_link_hash_undefweak
2754 || eh->root.type == bfd_link_hash_undefined))))
2755 {
2756 /* Make sure this symbol is output as a dynamic symbol.
2757 Undefined weak syms won't yet be marked as dynamic. */
2758 if (eh->dynindx == -1
2759 && !eh->forced_local)
2760 {
2761 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2762 return FALSE;
2763 }
2764
2765 /* If that succeeded, we know we'll be keeping all the
2766 relocs. */
2767 if (eh->dynindx != -1)
2768 goto keep;
2769 }
2770
2771 hh->dyn_relocs = NULL;
2772 return TRUE;
2773
2774 keep: ;
2775 }
2776
2777 /* Finally, allocate space. */
2778 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2779 {
2780 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2781 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2782 }
2783
2784 return TRUE;
2785 }
2786
2787 /* Find any dynamic relocs that apply to read-only sections. */
2788
2789 static bfd_boolean
2790 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2791 {
2792 struct elf_metag_link_hash_entry *hh;
2793 struct elf_metag_dyn_reloc_entry *hdh_p;
2794
2795 if (eh->root.type == bfd_link_hash_warning)
2796 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2797
2798 hh = (struct elf_metag_link_hash_entry *) eh;
2799 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2800 {
2801 asection *s = hdh_p->sec->output_section;
2802
2803 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2804 {
2805 struct bfd_link_info *info = inf;
2806
2807 info->flags |= DF_TEXTREL;
2808
2809 /* Not an error, just cut short the traversal. */
2810 return FALSE;
2811 }
2812 }
2813 return TRUE;
2814 }
2815
2816 /* Set the sizes of the dynamic sections. */
2817
2818 static bfd_boolean
2819 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2820 struct bfd_link_info *info)
2821 {
2822 struct elf_metag_link_hash_table *htab;
2823 bfd *dynobj;
2824 bfd *ibfd;
2825 asection *s;
2826 bfd_boolean relocs;
2827
2828 htab = metag_link_hash_table (info);
2829 dynobj = htab->etab.dynobj;
2830 if (dynobj == NULL)
2831 abort ();
2832
2833 if (htab->etab.dynamic_sections_created)
2834 {
2835 /* Set the contents of the .interp section to the interpreter. */
2836 if (bfd_link_executable (info) && !info->nointerp)
2837 {
2838 s = bfd_get_linker_section (dynobj, ".interp");
2839 if (s == NULL)
2840 abort ();
2841 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2842 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2843 }
2844 }
2845
2846 /* Set up .got offsets for local syms, and space for local dynamic
2847 relocs. */
2848 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2849 {
2850 bfd_signed_vma *local_got;
2851 bfd_signed_vma *end_local_got;
2852 bfd_size_type locsymcount;
2853 Elf_Internal_Shdr *symtab_hdr;
2854 asection *srel;
2855 char *local_tls_type;
2856
2857 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2858 continue;
2859
2860 for (s = ibfd->sections; s != NULL; s = s->next)
2861 {
2862 struct elf_metag_dyn_reloc_entry *hdh_p;
2863
2864 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2865 elf_section_data (s)->local_dynrel);
2866 hdh_p != NULL;
2867 hdh_p = hdh_p->hdh_next)
2868 {
2869 if (!bfd_is_abs_section (hdh_p->sec)
2870 && bfd_is_abs_section (hdh_p->sec->output_section))
2871 {
2872 /* Input section has been discarded, either because
2873 it is a copy of a linkonce section or due to
2874 linker script /DISCARD/, so we'll be discarding
2875 the relocs too. */
2876 }
2877 else if (hdh_p->count != 0)
2878 {
2879 srel = elf_section_data (hdh_p->sec)->sreloc;
2880 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2881 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2882 info->flags |= DF_TEXTREL;
2883 }
2884 }
2885 }
2886
2887 local_got = elf_local_got_refcounts (ibfd);
2888 if (!local_got)
2889 continue;
2890
2891 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2892 locsymcount = symtab_hdr->sh_info;
2893 end_local_got = local_got + locsymcount;
2894 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2895 s = htab->etab.sgot;
2896 srel = htab->etab.srelgot;
2897 for (; local_got < end_local_got; ++local_got)
2898 {
2899 if (*local_got > 0)
2900 {
2901 *local_got = s->size;
2902 s->size += GOT_ENTRY_SIZE;
2903 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2904 if (*local_tls_type == GOT_TLS_GD)
2905 s->size += 4;
2906 if (bfd_link_pic (info))
2907 srel->size += sizeof (Elf32_External_Rela);
2908 }
2909 else
2910 *local_got = (bfd_vma) -1;
2911 ++local_tls_type;
2912 }
2913 }
2914
2915 if (htab->tls_ldm_got.refcount > 0)
2916 {
2917 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2918 reloc. */
2919 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2920 htab->etab.sgot->size += 8;
2921 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2922 }
2923 else
2924 htab->tls_ldm_got.offset = -1;
2925
2926 /* Allocate global sym .plt and .got entries, and space for global
2927 sym dynamic relocs. */
2928 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2929
2930 /* We now have determined the sizes of the various dynamic sections.
2931 Allocate memory for them. */
2932 relocs = FALSE;
2933 for (s = dynobj->sections; s != NULL; s = s->next)
2934 {
2935 bfd_boolean reloc_section = FALSE;
2936
2937 if ((s->flags & SEC_LINKER_CREATED) == 0)
2938 continue;
2939
2940 if (s == htab->etab.splt
2941 || s == htab->etab.sgot
2942 || s == htab->etab.sgotplt
2943 || s == htab->sdynbss)
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 s = htab->srelbss;
3226
3227 rel.r_offset = (eh->root.u.def.value
3228 + eh->root.u.def.section->output_offset
3229 + eh->root.u.def.section->output_section->vma);
3230 rel.r_addend = 0;
3231 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3232 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3233 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3234 }
3235
3236 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3237 if (eh->root.root.string[0] == '_'
3238 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3239 || eh == htab->etab.hgot))
3240 {
3241 sym->st_shndx = SHN_ABS;
3242 }
3243
3244 return TRUE;
3245 }
3246
3247 /* Set the Meta ELF ABI version. */
3248
3249 static void
3250 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
3251 {
3252 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3253
3254 _bfd_elf_post_process_headers (abfd, link_info);
3255 i_ehdrp = elf_elfheader (abfd);
3256 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3257 }
3258
3259 /* Used to decide how to sort relocs in an optimal manner for the
3260 dynamic linker, before writing them out. */
3261
3262 static enum elf_reloc_type_class
3263 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3264 const asection *rel_sec ATTRIBUTE_UNUSED,
3265 const Elf_Internal_Rela *rela)
3266 {
3267 switch ((int) ELF32_R_TYPE (rela->r_info))
3268 {
3269 case R_METAG_RELATIVE:
3270 return reloc_class_relative;
3271 case R_METAG_JMP_SLOT:
3272 return reloc_class_plt;
3273 case R_METAG_COPY:
3274 return reloc_class_copy;
3275 default:
3276 return reloc_class_normal;
3277 }
3278 }
3279
3280 /* Finish up the dynamic sections. */
3281
3282 static bfd_boolean
3283 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3284 struct bfd_link_info *info)
3285 {
3286 bfd *dynobj;
3287 struct elf_metag_link_hash_table *htab;
3288 asection *sdyn;
3289
3290 htab = metag_link_hash_table (info);
3291 dynobj = htab->etab.dynobj;
3292
3293 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3294
3295 if (htab->etab.dynamic_sections_created)
3296 {
3297 asection *splt;
3298 Elf32_External_Dyn *dyncon, *dynconend;
3299
3300 if (sdyn == NULL)
3301 abort ();
3302
3303 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3304 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3305 for (; dyncon < dynconend; dyncon++)
3306 {
3307 Elf_Internal_Dyn dyn;
3308 asection *s;
3309
3310 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3311
3312 switch (dyn.d_tag)
3313 {
3314 default:
3315 continue;
3316
3317 case DT_PLTGOT:
3318 s = htab->etab.sgot;
3319 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3320 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3321 break;
3322
3323 case DT_JMPREL:
3324 s = htab->etab.srelplt;
3325 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3326 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3327 break;
3328
3329 case DT_PLTRELSZ:
3330 s = htab->etab.srelplt;
3331 dyn.d_un.d_val = s->size;
3332 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3333 break;
3334
3335 case DT_RELASZ:
3336 /* Don't count procedure linkage table relocs in the
3337 overall reloc count. */
3338 if (htab->etab.srelplt) {
3339 s = htab->etab.srelplt;
3340 dyn.d_un.d_val -= s->size;
3341 }
3342 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3343 break;
3344
3345 case DT_RELA:
3346 /* We may not be using the standard ELF linker script.
3347 If .rela.plt is the first .rela section, we adjust
3348 DT_RELA to not include it. */
3349 if (htab->etab.srelplt) {
3350 s = htab->etab.srelplt;
3351 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3352 dyn.d_un.d_ptr += s->size;
3353 }
3354 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3355 break;
3356 }
3357
3358 }
3359
3360 /* Fill in the first entry in the procedure linkage table. */
3361 splt = htab->etab.splt;
3362 if (splt && splt->size > 0)
3363 {
3364 unsigned long addr;
3365 /* addr = .got + 4 */
3366 addr = (htab->etab.sgot->output_section->vma
3367 + htab->etab.sgot->output_offset + 4);
3368 if (bfd_link_pic (info))
3369 {
3370 addr -= splt->output_section->vma + splt->output_offset;
3371 bfd_put_32 (output_bfd,
3372 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3373 splt->contents);
3374 bfd_put_32 (output_bfd,
3375 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3376 splt->contents + 4);
3377 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3378 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3379 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3380 }
3381 else
3382 {
3383 bfd_put_32 (output_bfd,
3384 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3385 splt->contents);
3386 bfd_put_32 (output_bfd,
3387 plt0_entry[1] | ((addr & 0xffff) << 3),
3388 splt->contents + 4);
3389 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3390 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3391 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3392 }
3393
3394 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3395 PLT_ENTRY_SIZE;
3396 }
3397 }
3398
3399 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
3400 {
3401 /* Fill in the first entry in the global offset table.
3402 We use it to point to our dynamic section, if we have one. */
3403 bfd_put_32 (output_bfd,
3404 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3405 htab->etab.sgot->contents);
3406
3407 /* The second entry is reserved for use by the dynamic linker. */
3408 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3409
3410 /* Set .got entry size. */
3411 elf_section_data (htab->etab.sgot->output_section)
3412 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3413 }
3414
3415 return TRUE;
3416 }
3417
3418 /* Return the section that should be marked against GC for a given
3419 relocation. */
3420
3421 static asection *
3422 elf_metag_gc_mark_hook (asection *sec,
3423 struct bfd_link_info *info,
3424 Elf_Internal_Rela *rela,
3425 struct elf_link_hash_entry *hh,
3426 Elf_Internal_Sym *sym)
3427 {
3428 if (hh != NULL)
3429 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3430 {
3431 case R_METAG_GNU_VTINHERIT:
3432 case R_METAG_GNU_VTENTRY:
3433 return NULL;
3434 }
3435
3436 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3437 }
3438
3439 /* Update the got and plt entry reference counts for the section being
3440 removed. */
3441
3442 static bfd_boolean
3443 elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3444 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3445 asection *sec ATTRIBUTE_UNUSED,
3446 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3447 {
3448 Elf_Internal_Shdr *symtab_hdr;
3449 struct elf_link_hash_entry **eh_syms;
3450 bfd_signed_vma *local_got_refcounts;
3451 bfd_signed_vma *local_plt_refcounts;
3452 const Elf_Internal_Rela *rel, *relend;
3453
3454 if (bfd_link_relocatable (info))
3455 return TRUE;
3456
3457 elf_section_data (sec)->local_dynrel = NULL;
3458
3459 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3460 eh_syms = elf_sym_hashes (abfd);
3461 local_got_refcounts = elf_local_got_refcounts (abfd);
3462 local_plt_refcounts = local_got_refcounts;
3463 if (local_plt_refcounts != NULL)
3464 local_plt_refcounts += symtab_hdr->sh_info;
3465
3466 relend = relocs + sec->reloc_count;
3467 for (rel = relocs; rel < relend; rel++)
3468 {
3469 unsigned long r_symndx;
3470 unsigned int r_type;
3471 struct elf_link_hash_entry *eh = NULL;
3472
3473 r_symndx = ELF32_R_SYM (rel->r_info);
3474 if (r_symndx >= symtab_hdr->sh_info)
3475 {
3476 struct elf_metag_link_hash_entry *hh;
3477 struct elf_metag_dyn_reloc_entry **hdh_pp;
3478 struct elf_metag_dyn_reloc_entry *hdh_p;
3479
3480 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3481 while (eh->root.type == bfd_link_hash_indirect
3482 || eh->root.type == bfd_link_hash_warning)
3483 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3484 hh = (struct elf_metag_link_hash_entry *) eh;
3485
3486 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3487 hdh_pp = &hdh_p->hdh_next)
3488 if (hdh_p->sec == sec)
3489 {
3490 /* Everything must go for SEC. */
3491 *hdh_pp = hdh_p->hdh_next;
3492 break;
3493 }
3494 }
3495
3496 r_type = ELF32_R_TYPE (rel->r_info);
3497 switch (r_type)
3498 {
3499 case R_METAG_TLS_LDM:
3500 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3501 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3502 break;
3503 case R_METAG_TLS_IE:
3504 case R_METAG_TLS_GD:
3505 case R_METAG_GETSET_GOT:
3506 if (eh != NULL)
3507 {
3508 if (eh->got.refcount > 0)
3509 eh->got.refcount -= 1;
3510 }
3511 else if (local_got_refcounts != NULL)
3512 {
3513 if (local_got_refcounts[r_symndx] > 0)
3514 local_got_refcounts[r_symndx] -= 1;
3515 }
3516 break;
3517
3518 case R_METAG_RELBRANCH_PLT:
3519 if (eh != NULL)
3520 {
3521 if (eh->plt.refcount > 0)
3522 eh->plt.refcount -= 1;
3523 }
3524 break;
3525
3526 case R_METAG_ADDR32:
3527 case R_METAG_HIADDR16:
3528 case R_METAG_LOADDR16:
3529 case R_METAG_GETSETOFF:
3530 case R_METAG_RELBRANCH:
3531 if (eh != NULL)
3532 {
3533 struct elf_metag_link_hash_entry *hh;
3534 struct elf_metag_dyn_reloc_entry **hdh_pp;
3535 struct elf_metag_dyn_reloc_entry *hdh_p;
3536
3537 if (!bfd_link_pic (info) && eh->plt.refcount > 0)
3538 eh->plt.refcount -= 1;
3539
3540 hh = (struct elf_metag_link_hash_entry *) eh;
3541
3542 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3543 hdh_pp = &hdh_p->hdh_next)
3544 if (hdh_p->sec == sec)
3545 {
3546 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3547 hdh_p->relative_count -= 1;
3548 hdh_p->count -= 1;
3549 if (hdh_p->count == 0)
3550 *hdh_pp = hdh_p->hdh_next;
3551 break;
3552 }
3553 }
3554 break;
3555
3556 default:
3557 break;
3558 }
3559 }
3560
3561 return TRUE;
3562 }
3563
3564 /* Determine the type of stub needed, if any, for a call. */
3565
3566 static enum elf_metag_stub_type
3567 metag_type_of_stub (asection *input_sec,
3568 const Elf_Internal_Rela *rel,
3569 struct elf_metag_link_hash_entry *hh,
3570 bfd_vma destination,
3571 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3572 {
3573 bfd_vma location;
3574 bfd_vma branch_offset;
3575 bfd_vma max_branch_offset;
3576
3577 if (hh != NULL &&
3578 !(hh->eh.root.type == bfd_link_hash_defined
3579 || hh->eh.root.type == bfd_link_hash_defweak))
3580 return metag_stub_none;
3581
3582 /* Determine where the call point is. */
3583 location = (input_sec->output_offset
3584 + input_sec->output_section->vma
3585 + rel->r_offset);
3586
3587 branch_offset = destination - location;
3588
3589 /* Determine if a long branch stub is needed. Meta branch offsets
3590 are signed 19 bits 4 byte aligned. */
3591 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3592
3593 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3594 {
3595 if (bfd_link_pic (info))
3596 return metag_stub_long_branch_shared;
3597 else
3598 return metag_stub_long_branch;
3599 }
3600
3601 return metag_stub_none;
3602 }
3603
3604 #define MOVT_A0_3 0x82180005
3605 #define JUMP_A0_3 0xac180003
3606
3607 #define MOVT_A1LBP 0x83080005
3608 #define ADD_A1LBP 0x83080000
3609
3610 #define ADDT_A0_3_CPC 0x82980001
3611 #define ADD_A0_3_A0_3 0x82180000
3612 #define MOV_PC_A0_3 0xa3180ca0
3613
3614 static bfd_boolean
3615 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3616 {
3617 struct elf_metag_stub_hash_entry *hsh;
3618 asection *stub_sec;
3619 bfd *stub_bfd;
3620 bfd_byte *loc;
3621 bfd_vma sym_value;
3622 int size;
3623
3624 /* Massage our args to the form they really have. */
3625 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3626
3627 stub_sec = hsh->stub_sec;
3628
3629 /* Make a note of the offset within the stubs for this entry. */
3630 hsh->stub_offset = stub_sec->size;
3631 loc = stub_sec->contents + hsh->stub_offset;
3632
3633 stub_bfd = stub_sec->owner;
3634
3635 switch (hsh->stub_type)
3636 {
3637 case metag_stub_long_branch_shared:
3638 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3639 calculate the jump target using A0.3 as a temporary. Then a MOV
3640 to PC carries out the jump. */
3641 sym_value = (hsh->target_value
3642 + hsh->target_section->output_offset
3643 + hsh->target_section->output_section->vma
3644 + hsh->addend);
3645
3646 sym_value -= (hsh->stub_offset
3647 + stub_sec->output_offset
3648 + stub_sec->output_section->vma);
3649
3650 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3651 loc);
3652
3653 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3654 loc + 4);
3655
3656 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3657
3658 size = 12;
3659 break;
3660 case metag_stub_long_branch:
3661 /* A standard long branch stub is a MOVT instruction followed by a
3662 JUMP instruction using the A0.3 register as a temporary. This is
3663 the same method used by the LDLK linker (patch.c). */
3664 sym_value = (hsh->target_value
3665 + hsh->target_section->output_offset
3666 + hsh->target_section->output_section->vma
3667 + hsh->addend);
3668
3669 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3670 loc);
3671
3672 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3673
3674 size = 8;
3675 break;
3676 default:
3677 BFD_FAIL ();
3678 return FALSE;
3679 }
3680
3681 stub_sec->size += size;
3682 return TRUE;
3683 }
3684
3685 /* As above, but don't actually build the stub. Just bump offset so
3686 we know stub section sizes. */
3687
3688 static bfd_boolean
3689 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3690 {
3691 struct elf_metag_stub_hash_entry *hsh;
3692 int size = 0;
3693
3694 /* Massage our args to the form they really have. */
3695 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3696
3697 if (hsh->stub_type == metag_stub_long_branch)
3698 size = 8;
3699 else if (hsh->stub_type == metag_stub_long_branch_shared)
3700 size = 12;
3701
3702 hsh->stub_sec->size += size;
3703 return TRUE;
3704 }
3705
3706 /* Set up various things so that we can make a list of input sections
3707 for each output section included in the link. Returns -1 on error,
3708 0 when no stubs will be needed, and 1 on success. */
3709
3710 int
3711 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3712 {
3713 bfd *input_bfd;
3714 unsigned int bfd_count;
3715 unsigned int top_id, top_index;
3716 asection *section;
3717 asection **input_list, **list;
3718 bfd_size_type amt;
3719 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3720
3721 /* Count the number of input BFDs and find the top input section id. */
3722 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3723 input_bfd != NULL;
3724 input_bfd = input_bfd->link.next)
3725 {
3726 bfd_count += 1;
3727 for (section = input_bfd->sections;
3728 section != NULL;
3729 section = section->next)
3730 {
3731 if (top_id < section->id)
3732 top_id = section->id;
3733 }
3734 }
3735
3736 htab->bfd_count = bfd_count;
3737
3738 amt = sizeof (struct map_stub) * (top_id + 1);
3739 htab->stub_group = bfd_zmalloc (amt);
3740 if (htab->stub_group == NULL)
3741 return -1;
3742
3743 /* We can't use output_bfd->section_count here to find the top output
3744 section index as some sections may have been removed, and
3745 strip_excluded_output_sections doesn't renumber the indices. */
3746 for (section = output_bfd->sections, top_index = 0;
3747 section != NULL;
3748 section = section->next)
3749 {
3750 if (top_index < section->index)
3751 top_index = section->index;
3752 }
3753
3754 htab->top_index = top_index;
3755 amt = sizeof (asection *) * (top_index + 1);
3756 input_list = bfd_malloc (amt);
3757 htab->input_list = input_list;
3758 if (input_list == NULL)
3759 return -1;
3760
3761 /* For sections we aren't interested in, mark their entries with a
3762 value we can check later. */
3763 list = input_list + top_index;
3764 do
3765 *list = bfd_abs_section_ptr;
3766 while (list-- != input_list);
3767
3768 for (section = output_bfd->sections;
3769 section != NULL;
3770 section = section->next)
3771 {
3772 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3773 * have PC relative relocs in them but no code flag set. */
3774 if (((section->flags & SEC_CODE) != 0) ||
3775 strcmp(".ctors", section->name) ||
3776 strcmp(".dtors", section->name))
3777 input_list[section->index] = NULL;
3778 }
3779
3780 return 1;
3781 }
3782
3783 /* The linker repeatedly calls this function for each input section,
3784 in the order that input sections are linked into output sections.
3785 Build lists of input sections to determine groupings between which
3786 we may insert linker stubs. */
3787
3788 void
3789 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3790 {
3791 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3792
3793 if (isec->output_section->index <= htab->top_index)
3794 {
3795 asection **list = htab->input_list + isec->output_section->index;
3796 if (*list != bfd_abs_section_ptr)
3797 {
3798 /* Steal the link_sec pointer for our list. */
3799 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3800 /* This happens to make the list in reverse order,
3801 which is what we want. */
3802 PREV_SEC (isec) = *list;
3803 *list = isec;
3804 }
3805 }
3806 }
3807
3808 /* See whether we can group stub sections together. Grouping stub
3809 sections may result in fewer stubs. More importantly, we need to
3810 put all .init* and .fini* stubs at the beginning of the .init or
3811 .fini output sections respectively, because glibc splits the
3812 _init and _fini functions into multiple parts. Putting a stub in
3813 the middle of a function is not a good idea. */
3814
3815 static void
3816 group_sections (struct elf_metag_link_hash_table *htab,
3817 bfd_size_type stub_group_size,
3818 bfd_boolean stubs_always_before_branch)
3819 {
3820 asection **list = htab->input_list + htab->top_index;
3821 do
3822 {
3823 asection *tail = *list;
3824 if (tail == bfd_abs_section_ptr)
3825 continue;
3826 while (tail != NULL)
3827 {
3828 asection *curr;
3829 asection *prev;
3830 bfd_size_type total;
3831 bfd_boolean big_sec;
3832
3833 curr = tail;
3834 total = tail->size;
3835 big_sec = total >= stub_group_size;
3836
3837 while ((prev = PREV_SEC (curr)) != NULL
3838 && ((total += curr->output_offset - prev->output_offset)
3839 < stub_group_size))
3840 curr = prev;
3841
3842 /* OK, the size from the start of CURR to the end is less
3843 than stub_group_size bytes and thus can be handled by one stub
3844 section. (or the tail section is itself larger than
3845 stub_group_size bytes, in which case we may be toast.)
3846 We should really be keeping track of the total size of
3847 stubs added here, as stubs contribute to the final output
3848 section size. */
3849 do
3850 {
3851 prev = PREV_SEC (tail);
3852 /* Set up this stub group. */
3853 htab->stub_group[tail->id].link_sec = curr;
3854 }
3855 while (tail != curr && (tail = prev) != NULL);
3856
3857 /* But wait, there's more! Input sections up to stub_group_size
3858 bytes before the stub section can be handled by it too.
3859 Don't do this if we have a really large section after the
3860 stubs, as adding more stubs increases the chance that
3861 branches may not reach into the stub section. */
3862 if (!stubs_always_before_branch && !big_sec)
3863 {
3864 total = 0;
3865 while (prev != NULL
3866 && ((total += tail->output_offset - prev->output_offset)
3867 < stub_group_size))
3868 {
3869 tail = prev;
3870 prev = PREV_SEC (tail);
3871 htab->stub_group[tail->id].link_sec = curr;
3872 }
3873 }
3874 tail = prev;
3875 }
3876 }
3877 while (list-- != htab->input_list);
3878 free (htab->input_list);
3879 #undef PREV_SEC
3880 }
3881
3882 /* Read in all local syms for all input bfds.
3883 Returns -1 on error, 0 otherwise. */
3884
3885 static int
3886 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3887 struct bfd_link_info *info)
3888 {
3889 unsigned int bfd_indx;
3890 Elf_Internal_Sym *local_syms, **all_local_syms;
3891 int stub_changed = 0;
3892 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3893
3894 /* We want to read in symbol extension records only once. To do this
3895 we need to read in the local symbols in parallel and save them for
3896 later use; so hold pointers to the local symbols in an array. */
3897 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3898 all_local_syms = bfd_zmalloc (amt);
3899 htab->all_local_syms = all_local_syms;
3900 if (all_local_syms == NULL)
3901 return -1;
3902
3903 /* Walk over all the input BFDs, swapping in local symbols. */
3904 for (bfd_indx = 0;
3905 input_bfd != NULL;
3906 input_bfd = input_bfd->link.next, bfd_indx++)
3907 {
3908 Elf_Internal_Shdr *symtab_hdr;
3909
3910 /* We'll need the symbol table in a second. */
3911 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3912 if (symtab_hdr->sh_info == 0)
3913 continue;
3914
3915 /* We need an array of the local symbols attached to the input bfd. */
3916 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3917 if (local_syms == NULL)
3918 {
3919 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3920 symtab_hdr->sh_info, 0,
3921 NULL, NULL, NULL);
3922 /* Cache them for elf_link_input_bfd. */
3923 symtab_hdr->contents = (unsigned char *) local_syms;
3924 }
3925 if (local_syms == NULL)
3926 return -1;
3927
3928 all_local_syms[bfd_indx] = local_syms;
3929 }
3930
3931 return stub_changed;
3932 }
3933
3934 /* Determine and set the size of the stub section for a final link.
3935
3936 The basic idea here is to examine all the relocations looking for
3937 PC-relative calls to a target that is unreachable with a "CALLR"
3938 instruction. */
3939
3940 /* See elf32-hppa.c and elf64-ppc.c. */
3941
3942 bfd_boolean
3943 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3944 struct bfd_link_info *info,
3945 bfd_signed_vma group_size,
3946 asection * (*add_stub_section) (const char *, asection *),
3947 void (*layout_sections_again) (void))
3948 {
3949 bfd_size_type stub_group_size;
3950 bfd_boolean stubs_always_before_branch;
3951 bfd_boolean stub_changed;
3952 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3953
3954 /* Stash our params away. */
3955 htab->stub_bfd = stub_bfd;
3956 htab->add_stub_section = add_stub_section;
3957 htab->layout_sections_again = layout_sections_again;
3958 stubs_always_before_branch = group_size < 0;
3959 if (group_size < 0)
3960 stub_group_size = -group_size;
3961 else
3962 stub_group_size = group_size;
3963 if (stub_group_size == 1)
3964 {
3965 /* Default values. */
3966 /* FIXME: not sure what these values should be */
3967 if (stubs_always_before_branch)
3968 {
3969 stub_group_size = (1 << BRANCH_BITS);
3970 }
3971 else
3972 {
3973 stub_group_size = (1 << BRANCH_BITS);
3974 }
3975 }
3976
3977 group_sections (htab, stub_group_size, stubs_always_before_branch);
3978
3979 switch (get_local_syms (output_bfd, info->input_bfds, info))
3980 {
3981 default:
3982 if (htab->all_local_syms)
3983 goto error_ret_free_local;
3984 return FALSE;
3985
3986 case 0:
3987 stub_changed = FALSE;
3988 break;
3989
3990 case 1:
3991 stub_changed = TRUE;
3992 break;
3993 }
3994
3995 while (1)
3996 {
3997 bfd *input_bfd;
3998 unsigned int bfd_indx;
3999 asection *stub_sec;
4000
4001 for (input_bfd = info->input_bfds, bfd_indx = 0;
4002 input_bfd != NULL;
4003 input_bfd = input_bfd->link.next, bfd_indx++)
4004 {
4005 Elf_Internal_Shdr *symtab_hdr;
4006 asection *section;
4007 Elf_Internal_Sym *local_syms;
4008
4009 /* We'll need the symbol table in a second. */
4010 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4011 if (symtab_hdr->sh_info == 0)
4012 continue;
4013
4014 local_syms = htab->all_local_syms[bfd_indx];
4015
4016 /* Walk over each section attached to the input bfd. */
4017 for (section = input_bfd->sections;
4018 section != NULL;
4019 section = section->next)
4020 {
4021 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4022
4023 /* If there aren't any relocs, then there's nothing more
4024 to do. */
4025 if ((section->flags & SEC_RELOC) == 0
4026 || section->reloc_count == 0)
4027 continue;
4028
4029 /* If this section is a link-once section that will be
4030 discarded, then don't create any stubs. */
4031 if (section->output_section == NULL
4032 || section->output_section->owner != output_bfd)
4033 continue;
4034
4035 /* Get the relocs. */
4036 internal_relocs
4037 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4038 info->keep_memory);
4039 if (internal_relocs == NULL)
4040 goto error_ret_free_local;
4041
4042 /* Now examine each relocation. */
4043 irela = internal_relocs;
4044 irelaend = irela + section->reloc_count;
4045 for (; irela < irelaend; irela++)
4046 {
4047 unsigned int r_type, r_indx;
4048 enum elf_metag_stub_type stub_type;
4049 struct elf_metag_stub_hash_entry *hsh;
4050 asection *sym_sec;
4051 bfd_vma sym_value;
4052 bfd_vma destination;
4053 struct elf_metag_link_hash_entry *hh;
4054 char *stub_name;
4055 const asection *id_sec;
4056
4057 r_type = ELF32_R_TYPE (irela->r_info);
4058 r_indx = ELF32_R_SYM (irela->r_info);
4059
4060 if (r_type >= (unsigned int) R_METAG_MAX)
4061 {
4062 bfd_set_error (bfd_error_bad_value);
4063 error_ret_free_internal:
4064 if (elf_section_data (section)->relocs == NULL)
4065 free (internal_relocs);
4066 goto error_ret_free_local;
4067 }
4068
4069 /* Only look for stubs on CALLR and B instructions. */
4070 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4071 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4072 continue;
4073
4074 /* Now determine the call target, its name, value,
4075 section. */
4076 sym_sec = NULL;
4077 sym_value = 0;
4078 destination = 0;
4079 hh = NULL;
4080 if (r_indx < symtab_hdr->sh_info)
4081 {
4082 /* It's a local symbol. */
4083 Elf_Internal_Sym *sym;
4084 Elf_Internal_Shdr *hdr;
4085 unsigned int shndx;
4086
4087 sym = local_syms + r_indx;
4088 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4089 sym_value = sym->st_value;
4090 shndx = sym->st_shndx;
4091 if (shndx < elf_numsections (input_bfd))
4092 {
4093 hdr = elf_elfsections (input_bfd)[shndx];
4094 sym_sec = hdr->bfd_section;
4095 destination = (sym_value + irela->r_addend
4096 + sym_sec->output_offset
4097 + sym_sec->output_section->vma);
4098 }
4099 }
4100 else
4101 {
4102 /* It's an external symbol. */
4103 int e_indx;
4104
4105 e_indx = r_indx - symtab_hdr->sh_info;
4106 hh = ((struct elf_metag_link_hash_entry *)
4107 elf_sym_hashes (input_bfd)[e_indx]);
4108
4109 while (hh->eh.root.type == bfd_link_hash_indirect
4110 || hh->eh.root.type == bfd_link_hash_warning)
4111 hh = ((struct elf_metag_link_hash_entry *)
4112 hh->eh.root.u.i.link);
4113
4114 if (hh->eh.root.type == bfd_link_hash_defined
4115 || hh->eh.root.type == bfd_link_hash_defweak)
4116 {
4117 sym_sec = hh->eh.root.u.def.section;
4118 sym_value = hh->eh.root.u.def.value;
4119 if (hh->eh.plt.offset != (bfd_vma) -1
4120 && hh->eh.dynindx != -1
4121 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4122 {
4123 sym_sec = htab->etab.splt;
4124 sym_value = hh->eh.plt.offset;
4125 }
4126
4127 if (sym_sec->output_section != NULL)
4128 destination = (sym_value + irela->r_addend
4129 + sym_sec->output_offset
4130 + sym_sec->output_section->vma);
4131 else
4132 continue;
4133 }
4134 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4135 {
4136 if (! bfd_link_pic (info))
4137 continue;
4138 }
4139 else if (hh->eh.root.type == bfd_link_hash_undefined)
4140 {
4141 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4142 && (ELF_ST_VISIBILITY (hh->eh.other)
4143 == STV_DEFAULT)))
4144 continue;
4145 }
4146 else
4147 {
4148 bfd_set_error (bfd_error_bad_value);
4149 goto error_ret_free_internal;
4150 }
4151 }
4152
4153 /* Determine what (if any) linker stub is needed. */
4154 stub_type = metag_type_of_stub (section, irela, hh,
4155 destination, info);
4156 if (stub_type == metag_stub_none)
4157 continue;
4158
4159 /* Support for grouping stub sections. */
4160 id_sec = htab->stub_group[section->id].link_sec;
4161
4162 /* Get the name of this stub. */
4163 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4164 if (!stub_name)
4165 goto error_ret_free_internal;
4166
4167 hsh = metag_stub_hash_lookup (&htab->bstab,
4168 stub_name,
4169 FALSE, FALSE);
4170 if (hsh != NULL)
4171 {
4172 /* The proper stub has already been created. */
4173 free (stub_name);
4174 continue;
4175 }
4176
4177 hsh = metag_add_stub (stub_name, section, htab);
4178 if (hsh == NULL)
4179 {
4180 free (stub_name);
4181 goto error_ret_free_internal;
4182 }
4183 hsh->target_value = sym_value;
4184 hsh->target_section = sym_sec;
4185 hsh->stub_type = stub_type;
4186 hsh->hh = hh;
4187 hsh->addend = irela->r_addend;
4188 stub_changed = TRUE;
4189 }
4190
4191 /* We're done with the internal relocs, free them. */
4192 if (elf_section_data (section)->relocs == NULL)
4193 free (internal_relocs);
4194 }
4195 }
4196
4197 if (!stub_changed)
4198 break;
4199
4200 /* OK, we've added some stubs. Find out the new size of the
4201 stub sections. */
4202 for (stub_sec = htab->stub_bfd->sections;
4203 stub_sec != NULL;
4204 stub_sec = stub_sec->next)
4205 stub_sec->size = 0;
4206
4207 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4208
4209 /* Ask the linker to do its stuff. */
4210 (*htab->layout_sections_again) ();
4211 stub_changed = FALSE;
4212 }
4213
4214 free (htab->all_local_syms);
4215 return TRUE;
4216
4217 error_ret_free_local:
4218 free (htab->all_local_syms);
4219 return FALSE;
4220 }
4221
4222 /* Build all the stubs associated with the current output file. The
4223 stubs are kept in a hash table attached to the main linker hash
4224 table. This function is called via metagelf_finish in the linker. */
4225
4226 bfd_boolean
4227 elf_metag_build_stubs (struct bfd_link_info *info)
4228 {
4229 asection *stub_sec;
4230 struct bfd_hash_table *table;
4231 struct elf_metag_link_hash_table *htab;
4232
4233 htab = metag_link_hash_table (info);
4234
4235 for (stub_sec = htab->stub_bfd->sections;
4236 stub_sec != NULL;
4237 stub_sec = stub_sec->next)
4238 {
4239 bfd_size_type size;
4240
4241 /* Allocate memory to hold the linker stubs. */
4242 size = stub_sec->size;
4243 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4244 if (stub_sec->contents == NULL && size != 0)
4245 return FALSE;
4246 stub_sec->size = 0;
4247 }
4248
4249 /* Build the stubs as directed by the stub hash table. */
4250 table = &htab->bstab;
4251 bfd_hash_traverse (table, metag_build_one_stub, info);
4252
4253 return TRUE;
4254 }
4255
4256 /* Return TRUE if SYM represents a local label symbol. */
4257
4258 static bfd_boolean
4259 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4260 {
4261 if (name[0] == '$' && name[1] == 'L')
4262 return 1;
4263 return _bfd_elf_is_local_label_name (abfd, name);
4264 }
4265
4266 /* Return address for Ith PLT stub in section PLT, for relocation REL
4267 or (bfd_vma) -1 if it should not be included. */
4268
4269 static bfd_vma
4270 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4271 const arelent *rel ATTRIBUTE_UNUSED)
4272 {
4273 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4274 }
4275
4276 #define ELF_ARCH bfd_arch_metag
4277 #define ELF_TARGET_ID METAG_ELF_DATA
4278 #define ELF_MACHINE_CODE EM_METAG
4279 #define ELF_MINPAGESIZE 0x1000
4280 #define ELF_MAXPAGESIZE 0x4000
4281 #define ELF_COMMONPAGESIZE 0x1000
4282
4283 #define TARGET_LITTLE_SYM metag_elf32_vec
4284 #define TARGET_LITTLE_NAME "elf32-metag"
4285
4286 #define elf_symbol_leading_char '_'
4287
4288 #define elf_info_to_howto_rel NULL
4289 #define elf_info_to_howto metag_info_to_howto_rela
4290
4291 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4292 #define bfd_elf32_bfd_link_hash_table_create \
4293 elf_metag_link_hash_table_create
4294 #define elf_backend_relocate_section elf_metag_relocate_section
4295 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4296 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4297 #define elf_backend_check_relocs elf_metag_check_relocs
4298 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4299 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4300 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4301 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4302 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4303 #define elf_backend_omit_section_dynsym \
4304 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4305 #define elf_backend_post_process_headers elf_metag_post_process_headers
4306 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4307 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4308 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4309
4310 #define elf_backend_can_gc_sections 1
4311 #define elf_backend_can_refcount 1
4312 #define elf_backend_rela_normal 1
4313 #define elf_backend_want_got_plt 1
4314 #define elf_backend_want_got_sym 0
4315 #define elf_backend_want_plt_sym 0
4316 #define elf_backend_plt_readonly 1
4317
4318 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4319 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4320
4321 #include "elf32-target.h"
GDB Binutils - Deliverables
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