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PR gas/15039
[thirdparty/binutils-gdb.git] / bfd / elf32-metag.c
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a3c62988
NC		 1/* Meta support for 32-bit ELF
2 Copyright (C) 2013 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
37static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73/* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93#define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95static reloc_howto_type elf_metag_howto_table[] =
96{
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681};
682
683#define BRANCH_BITS 19
684
685/* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694#define GOT_REG_OFFSET 0x2000
695
696struct metag_reloc_map
697{
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700};
701
702static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746enum elf_metag_stub_type
747{
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751};
752
753struct elf_metag_stub_hash_entry
754{
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780};
781
782struct elf_metag_link_hash_entry
783{
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811};
812
813struct elf_metag_link_hash_table
814{
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sgot;
847 asection *sgotplt;
848 asection *srelgot;
849 asection *splt;
850 asection *srelplt;
851 asection *sdynbss;
852 asection *srelbss;
853
854 /* Small local sym cache. */
855 struct sym_cache sym_cache;
856
857 /* Data for LDM relocations. */
858 union
859 {
860 bfd_signed_vma refcount;
861 bfd_vma offset;
862 } tls_ldm_got;
863};
864
865/* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
867 segment p_vaddr. */
868static bfd_vma
869dtpoff_base (struct bfd_link_info *info)
870{
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info)->tls_sec == NULL)
873 return 0;
874 return elf_hash_table (info)->tls_sec->vma;
875}
876
877/* Return the relocation value for R_METAG_TLS_IE */
878static bfd_vma
879tpoff (struct bfd_link_info *info, bfd_vma address)
880{
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info)->tls_sec == NULL)
883 return 0;
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address - elf_hash_table (info)->tls_sec->vma
887 + align_power ((bfd_vma) 8,
888 elf_hash_table (info)->tls_sec->alignment_power));
889}
890
891static void
892metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
893 arelent *cache_ptr,
894 Elf_Internal_Rela *dst)
895{
896 unsigned int r_type;
897
898 r_type = ELF32_R_TYPE (dst->r_info);
899 BFD_ASSERT (r_type < (unsigned int) R_METAG_MAX);
900 cache_ptr->howto = & elf_metag_howto_table [r_type];
901}
902
903static reloc_howto_type *
904metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
905 bfd_reloc_code_real_type code)
906{
907 unsigned int i;
908
909 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
910 if (metag_reloc_map [i].bfd_reloc_val == code)
911 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
912
913 return NULL;
914}
915
916static reloc_howto_type *
917metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
918 const char *r_name)
919{
920 unsigned int i;
921
922 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
923 if (elf_metag_howto_table[i].name != NULL
924 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
925 return &elf_metag_howto_table[i];
926
927 return NULL;
928}
929
930/* Various hash macros and functions. */
931#define metag_link_hash_table(p) \
932 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
933 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
934
935#define metag_elf_hash_entry(ent) \
936 ((struct elf_metag_link_hash_entry *)(ent))
937
938#define metag_stub_hash_entry(ent) \
939 ((struct elf_metag_stub_hash_entry *)(ent))
940
941#define metag_stub_hash_lookup(table, string, create, copy) \
942 ((struct elf_metag_stub_hash_entry *) \
943 bfd_hash_lookup ((table), (string), (create), (copy)))
944
945#define metag_elf_local_got_tls_type(abfd) \
946 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
947
948/* Assorted hash table functions. */
949
950/* Initialize an entry in the stub hash table. */
951
952static struct bfd_hash_entry *
953stub_hash_newfunc (struct bfd_hash_entry *entry,
954 struct bfd_hash_table *table,
955 const char *string)
956{
957 /* Allocate the structure if it has not already been allocated by a
958 subclass. */
959 if (entry == NULL)
960 {
961 entry = bfd_hash_allocate (table,
962 sizeof (struct elf_metag_stub_hash_entry));
963 if (entry == NULL)
964 return entry;
965 }
966
967 /* Call the allocation method of the superclass. */
968 entry = bfd_hash_newfunc (entry, table, string);
969 if (entry != NULL)
970 {
971 struct elf_metag_stub_hash_entry *hsh;
972
973 /* Initialize the local fields. */
974 hsh = (struct elf_metag_stub_hash_entry *) entry;
975 hsh->stub_sec = NULL;
976 hsh->stub_offset = 0;
977 hsh->target_value = 0;
978 hsh->target_section = NULL;
979 hsh->stub_type = metag_stub_long_branch;
980 hsh->hh = NULL;
981 hsh->id_sec = NULL;
982 }
983
984 return entry;
985}
986
987/* Initialize an entry in the link hash table. */
988
989static struct bfd_hash_entry *
990metag_link_hash_newfunc (struct bfd_hash_entry *entry,
991 struct bfd_hash_table *table,
992 const char *string)
993{
994 /* Allocate the structure if it has not already been allocated by a
995 subclass. */
996 if (entry == NULL)
997 {
998 entry = bfd_hash_allocate (table,
999 sizeof (struct elf_metag_link_hash_entry));
1000 if (entry == NULL)
1001 return entry;
1002 }
1003
1004 /* Call the allocation method of the superclass. */
1005 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1006 if (entry != NULL)
1007 {
1008 struct elf_metag_link_hash_entry *hh;
1009
1010 /* Initialize the local fields. */
1011 hh = (struct elf_metag_link_hash_entry *) entry;
1012 hh->hsh_cache = NULL;
1013 hh->dyn_relocs = NULL;
1014 hh->tls_type = GOT_UNKNOWN;
1015 }
1016
1017 return entry;
1018}
1019
1020/* Create the derived linker hash table. The Meta ELF port uses the derived
1021 hash table to keep information specific to the Meta ELF linker (without
1022 using static variables). */
1023
1024static struct bfd_link_hash_table *
1025elf_metag_link_hash_table_create (bfd *abfd)
1026{
1027 struct elf_metag_link_hash_table *htab;
1028 bfd_size_type amt = sizeof (*htab);
1029
1030 htab = bfd_malloc (amt);
1031 if (htab == NULL)
1032 return NULL;
1033
1034 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1035 metag_link_hash_newfunc,
1036 sizeof (struct elf_metag_link_hash_entry),
1037 METAG_ELF_DATA))
1038 {
1039 free (htab);
1040 return NULL;
1041 }
1042
1043 /* Init the stub hash table too. */
1044 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1045 sizeof (struct elf_metag_stub_hash_entry)))
1046 return NULL;
1047
1048 htab->stub_bfd = NULL;
1049 htab->add_stub_section = NULL;
1050 htab->layout_sections_again = NULL;
1051 htab->stub_group = NULL;
1052 htab->sgot = NULL;
1053 htab->sgotplt = NULL;
1054 htab->srelgot = NULL;
1055 htab->splt = NULL;
1056 htab->srelplt = NULL;
1057 htab->sdynbss = NULL;
1058 htab->srelbss = NULL;
1059 htab->sym_cache.abfd = NULL;
1060 htab->tls_ldm_got.refcount = 0;
1061
1062 return &htab->etab.root;
1063}
1064
1065/* Free the derived linker hash table. */
1066
1067static void
1068elf_metag_link_hash_table_free (struct bfd_link_hash_table *btab)
1069{
1070 struct elf_metag_link_hash_table *htab
1071 = (struct elf_metag_link_hash_table *) btab;
1072
1073 bfd_hash_table_free (&htab->bstab);
1074 _bfd_generic_link_hash_table_free (btab);
1075}
1076
1077/* Section name for stubs is the associated section name plus this
1078 string. */
1079#define STUB_SUFFIX ".stub"
1080
1081/* Build a name for an entry in the stub hash table. */
1082
1083static char *
1084metag_stub_name (const asection *input_section,
1085 const asection *sym_sec,
1086 const struct elf_metag_link_hash_entry *hh,
1087 const Elf_Internal_Rela *rel)
1088{
1089 char *stub_name;
1090 bfd_size_type len;
1091
1092 if (hh)
1093 {
1094 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1095 stub_name = bfd_malloc (len);
1096 if (stub_name != NULL)
1097 {
1098 sprintf (stub_name, "%08x_%s+%x",
1099 input_section->id & 0xffffffff,
1100 hh->eh.root.root.string,
1101 (int) rel->r_addend & 0xffffffff);
1102 }
1103 }
1104 else
1105 {
1106 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1107 stub_name = bfd_malloc (len);
1108 if (stub_name != NULL)
1109 {
1110 sprintf (stub_name, "%08x_%x:%x+%x",
1111 input_section->id & 0xffffffff,
1112 sym_sec->id & 0xffffffff,
1113 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1114 (int) rel->r_addend & 0xffffffff);
1115 }
1116 }
1117 return stub_name;
1118}
1119
1120/* Look up an entry in the stub hash. Stub entries are cached because
1121 creating the stub name takes a bit of time. */
1122
1123static struct elf_metag_stub_hash_entry *
1124metag_get_stub_entry (const asection *input_section,
1125 const asection *sym_sec,
1126 struct elf_metag_link_hash_entry *hh,
1127 const Elf_Internal_Rela *rel,
1128 struct elf_metag_link_hash_table *htab)
1129{
1130 struct elf_metag_stub_hash_entry *hsh;
1131 const asection *id_sec;
1132
1133 /* If this input section is part of a group of sections sharing one
1134 stub section, then use the id of the first section in the group.
1135 Stub names need to include a section id, as there may well be
1136 more than one stub used to reach say, printf, and we need to
1137 distinguish between them. */
1138 id_sec = htab->stub_group[input_section->id].link_sec;
1139
1140 if (hh != NULL && hh->hsh_cache != NULL
1141 && hh->hsh_cache->hh == hh
1142 && hh->hsh_cache->id_sec == id_sec)
1143 {
1144 hsh = hh->hsh_cache;
1145 }
1146 else
1147 {
1148 char *stub_name;
1149
1150 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1151 if (stub_name == NULL)
1152 return NULL;
1153
1154 hsh = metag_stub_hash_lookup (&htab->bstab,
1155 stub_name, FALSE, FALSE);
1156
1157 if (hh != NULL)
1158 hh->hsh_cache = hsh;
1159
1160 free (stub_name);
1161 }
1162
1163 return hsh;
1164}
1165
1166/* Add a new stub entry to the stub hash. Not all fields of the new
1167 stub entry are initialised. */
1168
1169static struct elf_metag_stub_hash_entry *
1170metag_add_stub (const char *stub_name,
1171 asection *section,
1172 struct elf_metag_link_hash_table *htab)
1173{
1174 asection *link_sec;
1175 asection *stub_sec;
1176 struct elf_metag_stub_hash_entry *hsh;
1177
1178 link_sec = htab->stub_group[section->id].link_sec;
1179 stub_sec = htab->stub_group[section->id].stub_sec;
1180 if (stub_sec == NULL)
1181 {
1182 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1183 if (stub_sec == NULL)
1184 {
1185 size_t namelen;
1186 bfd_size_type len;
1187 char *s_name;
1188
1189 namelen = strlen (link_sec->name);
1190 len = namelen + sizeof (STUB_SUFFIX);
1191 s_name = bfd_alloc (htab->stub_bfd, len);
1192 if (s_name == NULL)
1193 return NULL;
1194
1195 memcpy (s_name, link_sec->name, namelen);
1196 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1197
1198 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1199 if (stub_sec == NULL)
1200 return NULL;
1201 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1202 }
1203 htab->stub_group[section->id].stub_sec = stub_sec;
1204 }
1205
1206 /* Enter this entry into the linker stub hash table. */
1207 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1208 TRUE, FALSE);
1209 if (hsh == NULL)
1210 {
1211 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
1212 section->owner,
1213 stub_name);
1214 return NULL;
1215 }
1216
1217 hsh->stub_sec = stub_sec;
1218 hsh->stub_offset = 0;
1219 hsh->id_sec = link_sec;
1220 return hsh;
1221}
1222
1223/* Check a signed integer value can be represented in the given number
1224 of bits. */
1225
1226static bfd_boolean
1227within_signed_range (int value, unsigned int bits)
1228{
1229 int min_val = -(1 << (bits - 1));
1230 int max_val = (1 << (bits - 1)) - 1;
1231 return (value <= max_val) && (value >= min_val);
1232}
1233
1234/* Perform a relocation as part of a final link. */
1235
1236static bfd_reloc_status_type
1237metag_final_link_relocate (reloc_howto_type *howto,
1238 bfd *input_bfd,
1239 asection *input_section,
1240 bfd_byte *contents,
1241 Elf_Internal_Rela *rel,
1242 bfd_vma relocation,
1243 struct elf_metag_link_hash_entry *hh,
1244 struct elf_metag_link_hash_table *htab,
1245 asection *sym_sec)
1246{
1247 bfd_reloc_status_type r = bfd_reloc_ok;
1248 bfd_byte *hit_data = contents + rel->r_offset;
1249 int opcode, op_shift, op_extended, l1, l2;
1250 bfd_signed_vma srel, addend = rel->r_addend;
1251 struct elf_metag_stub_hash_entry *hsh = NULL;
1252 bfd_vma location;
1253
1254 /* Find out where we are and where we're going. */
1255 location = (rel->r_offset +
1256 input_section->output_offset +
1257 input_section->output_section->vma);
1258
1259 switch (howto->type)
1260 {
1261 case R_METAG_RELBRANCH:
1262 case R_METAG_RELBRANCH_PLT:
1263 /* Make it a pc relative offset. */
1264 relocation -= location;
1265 break;
1266 case R_METAG_TLS_GD:
1267 case R_METAG_TLS_IE:
1268 relocation -= elf_gp (input_section->output_section->owner);
1269 break;
1270 default:
1271 break;
1272 }
1273
1274 switch (howto->type)
1275 {
1276 case R_METAG_RELBRANCH_PLT:
1277 case R_METAG_RELBRANCH:
1278 opcode = bfd_get_32 (input_bfd, hit_data);
1279
1280 srel = (bfd_signed_vma) relocation;
1281 srel += addend;
1282
1283 /* If the branch is out of reach, then redirect the
1284 call to the local stub for this function. */
1285 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1286 (srel < - (1 << (BRANCH_BITS + 1))))
1287 {
1288 if (sym_sec == NULL)
1289 break;
1290
1291 hsh = metag_get_stub_entry (input_section, sym_sec,
1292 hh, rel, htab);
1293 if (hsh == NULL)
1294 return bfd_reloc_undefined;
1295
1296 /* Munge up the value and addend so that we call the stub
1297 rather than the procedure directly. */
1298 srel = (hsh->stub_offset
1299 + hsh->stub_sec->output_offset
1300 + hsh->stub_sec->output_section->vma);
1301 srel -= location;
1302 }
1303
1304 srel = srel >> 2;
1305
1306 if (!within_signed_range (srel, BRANCH_BITS))
1307 {
1308 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1309 srel = 0;
1310 else
1311 return bfd_reloc_overflow;
1312 }
1313
1314 opcode &= ~(0x7ffff << 5);
1315 opcode |= ((srel & 0x7ffff) << 5);
1316
1317 bfd_put_32 (input_bfd, opcode, hit_data);
1318 break;
1319 case R_METAG_GETSETOFF:
1320 case R_METAG_GETSET_GOT:
1321 case R_METAG_GETSET_GOTOFF:
1322 opcode = bfd_get_32 (input_bfd, hit_data);
1323
1324 srel = (bfd_signed_vma) relocation;
1325 srel += addend;
1326
1327 /* Is this a standard or extended GET/SET? */
1328 if ((opcode & 0xf0000000) == 0xa0000000)
1329 {
1330 /* Extended GET/SET. */
1331 l1 = opcode & 0x2;
1332 l2 = opcode & 0x4;
1333 op_extended = 1;
1334 }
1335 else
1336 {
1337 /* Standard GET/SET. */
1338 l1 = opcode & 0x01000000;
1339 l2 = opcode & 0x04000000;
1340 op_extended = 0;
1341 }
1342
1343 /* Calculate the width of the GET/SET and how much we need to
1344 shift the result by. */
1345 if (l2)
1346 if (l1)
1347 op_shift = 3;
1348 else
1349 op_shift = 2;
1350 else
1351 if (l1)
1352 op_shift = 1;
1353 else
1354 op_shift = 0;
1355
1356 /* GET/SET offsets are scaled by the width of the transfer. */
1357 srel = srel >> op_shift;
1358
1359 /* Extended GET/SET has signed 12 bits of offset, standard has
1360 signed 6 bits. */
1361 if (op_extended)
1362 {
1363 if (!within_signed_range (srel, 12))
1364 {
1365 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1366 srel = 0;
1367 else
1368 return bfd_reloc_overflow;
1369 }
1370 opcode &= ~(0xfff << 7);
1371 opcode |= ((srel & 0xfff) << 7);
1372 }
1373 else
1374 {
1375 if (!within_signed_range (srel, 5))
1376 {
1377 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1378 srel = 0;
1379 else
1380 return bfd_reloc_overflow;
1381 }
1382 opcode &= ~(0x3f << 8);
1383 opcode |= ((srel & 0x3f) << 8);
1384 }
1385
1386 bfd_put_32 (input_bfd, opcode, hit_data);
1387 break;
1388 case R_METAG_TLS_GD:
1389 case R_METAG_TLS_LDM:
1390 opcode = bfd_get_32 (input_bfd, hit_data);
1391
1392 if ((bfd_signed_vma)relocation < 0)
1393 {
1394 /* sign extend immediate */
1395 if ((opcode & 0xf2000001) == 0x02000000)
1396 {
1397 /* ADD De.e,Dx.r,#I16 */
1398 /* set SE bit */
1399 opcode |= (1 << 1);
1400 } else
1401 return bfd_reloc_overflow;
1402 }
1403
1404 bfd_put_32 (input_bfd, opcode, hit_data);
1405
1406 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1407 contents, rel->r_offset,
1408 relocation, rel->r_addend);
1409 break;
1410 default:
1411 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1412 contents, rel->r_offset,
1413 relocation, rel->r_addend);
1414 }
1415
1416 return r;
1417}
1418
1419/* This is defined because R_METAG_NONE != 0...
1420 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1421#define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1422 rel, relend, howto, contents) \
1423 { \
1424 _bfd_clear_contents (howto, input_bfd, input_section, \
1425 contents + rel->r_offset); \
1426 \
1427 if (info->relocatable \
1428 && (input_section->flags & SEC_DEBUGGING)) \
1429 { \
1430 /* Only remove relocations in debug sections since other \
1431 sections may require relocations. */ \
1432 Elf_Internal_Shdr *rel_hdr; \
1433 \
1434 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1435 \
1436 /* Avoid empty output section. */ \
1437 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1438 { \
1439 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1440 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1441 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1442 \
1443 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1444 \
1445 input_section->reloc_count--; \
1446 relend--; \
1447 rel--; \
1448 continue; \
1449 } \
1450 } \
1451 \
1452 rel->r_info = R_METAG_NONE; \
1453 rel->r_addend = 0; \
1454 continue; \
1455 }
1456
1457/* Relocate a META ELF section.
1458
1459The RELOCATE_SECTION function is called by the new ELF backend linker
1460to handle the relocations for a section.
1461
1462The relocs are always passed as Rela structures; if the section
1463actually uses Rel structures, the r_addend field will always be
1464zero.
1465
1466This function is responsible for adjusting the section contents as
1467necessary, and (if using Rela relocs and generating a relocatable
1468output file) adjusting the reloc addend as necessary.
1469
1470This function does not have to worry about setting the reloc
1471address or the reloc symbol index.
1472
1473LOCAL_SYMS is a pointer to the swapped in local symbols.
1474
1475LOCAL_SECTIONS is an array giving the section in the input file
1476corresponding to the st_shndx field of each local symbol.
1477
1478The global hash table entry for the global symbols can be found
1479via elf_sym_hashes (input_bfd).
1480
1481When generating relocatable output, this function must handle
1482STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1483going to be the section symbol corresponding to the output
1484section, which means that the addend must be adjusted
1485accordingly. */
1486
1487static bfd_boolean
1488elf_metag_relocate_section (bfd *output_bfd,
1489 struct bfd_link_info *info,
1490 bfd *input_bfd,
1491 asection *input_section,
1492 bfd_byte *contents,
1493 Elf_Internal_Rela *relocs,
1494 Elf_Internal_Sym *local_syms,
1495 asection **local_sections)
1496{
1497 bfd_vma *local_got_offsets;
1498 Elf_Internal_Shdr *symtab_hdr;
1499 struct elf_link_hash_entry **eh_syms;
1500 struct elf_metag_link_hash_table *htab;
1501 Elf_Internal_Rela *rel;
1502 Elf_Internal_Rela *relend;
1503 asection *sreloc;
1504
1505 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1506 eh_syms = elf_sym_hashes (input_bfd);
1507 relend = relocs + input_section->reloc_count;
1508
1509 htab = metag_link_hash_table (info);
1510 local_got_offsets = elf_local_got_offsets (input_bfd);
1511
1512 sreloc = NULL;
1513
1514 for (rel = relocs; rel < relend; rel ++)
1515 {
1516 reloc_howto_type *howto;
1517 unsigned long r_symndx;
1518 Elf_Internal_Sym *sym;
1519 asection *sec;
1520 struct elf_metag_link_hash_entry *hh;
1521 bfd_vma relocation;
1522 bfd_reloc_status_type r;
1523 const char *name;
1524 int r_type;
1525
1526 r_type = ELF32_R_TYPE (rel->r_info);
1527
1528 if (r_type == R_METAG_GNU_VTINHERIT
1529 || r_type == R_METAG_GNU_VTENTRY
1530 || r_type == R_METAG_NONE)
1531 continue;
1532
1533 r_symndx = ELF32_R_SYM (rel->r_info);
1534
1535 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1536 hh = NULL;
1537 sym = NULL;
1538 sec = NULL;
1539
1540 if (r_symndx < symtab_hdr->sh_info)
1541 {
1542 sym = local_syms + r_symndx;
1543 sec = local_sections [r_symndx];
1544 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1545
1546 name = bfd_elf_string_from_elf_section
1547 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1548 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1549 }
1550 else
1551 {
1552 struct elf_link_hash_entry *eh;
1553 bfd_boolean unresolved_reloc, warned;
1554
1555 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1556 r_symndx, symtab_hdr, eh_syms,
1557 eh, sec, relocation,
1558 unresolved_reloc, warned);
1559
1560 name = eh->root.root.string;
1561 hh = (struct elf_metag_link_hash_entry *) eh;
1562 }
1563
1564 if (sec != NULL && discarded_section (sec))
1565 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1566 rel, relend, howto, contents);
1567
1568 if (info->relocatable)
1569 continue;
1570
1571 switch (r_type)
1572 {
1573 case R_METAG_ADDR32:
1574 case R_METAG_RELBRANCH:
1575 if ((input_section->flags & SEC_ALLOC) == 0)
1576 break;
1577
1578 if ((info->shared
1579 && r_symndx != STN_UNDEF
1580 && (input_section->flags & SEC_ALLOC) != 0
1581 && (r_type != R_METAG_RELBRANCH
1582 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1583 || (!info->shared
1584 && hh != NULL
1585 && hh->eh.dynindx != -1
1586 && !hh->eh.non_got_ref
1587 && ((hh->eh.def_dynamic
1588 && !hh->eh.def_regular)
1589 || hh->eh.root.type == bfd_link_hash_undefweak
1590 || hh->eh.root.type == bfd_link_hash_undefined)))
1591 {
1592 Elf_Internal_Rela outrel;
1593 bfd_boolean skip, relocate;
1594 bfd_byte *loc;
1595
1596 /* When generating a shared object, these relocations
1597 are copied into the output file to be resolved at run
1598 time. */
1599
1600 sreloc = elf_section_data (input_section)->sreloc;
1601 BFD_ASSERT (sreloc != NULL);
1602
1603 skip = FALSE;
1604 relocate = FALSE;
1605
1606 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1607 info,
1608 input_section,
1609 rel->r_offset);
1610 if (outrel.r_offset == (bfd_vma) -1)
1611 skip = TRUE;
1612 else if (outrel.r_offset == (bfd_vma) -2)
1613 skip = TRUE, relocate = TRUE;
1614 outrel.r_offset += (input_section->output_section->vma
1615 + input_section->output_offset);
1616
1617 if (skip)
1618 {
1619 memset (&outrel, 0, sizeof outrel);
1620 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1621 }
1622 else if (r_type == R_METAG_RELBRANCH)
1623 {
1624 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1625 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1626 outrel.r_addend = rel->r_addend;
1627 }
1628 else
1629 {
1630 /* h->dynindx may be -1 if this symbol was marked to
1631 become local. */
1632 if (hh == NULL
1633 || ((info->symbolic || hh->eh.dynindx == -1)
1634 && hh->eh.def_regular))
1635 {
1636 relocate = TRUE;
1637 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1638 outrel.r_addend = relocation + rel->r_addend;
1639 }
1640 else
1641 {
1642 BFD_ASSERT (hh->eh.dynindx != -1);
1643 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1644 outrel.r_addend = rel->r_addend;
1645 }
1646 }
1647
1648 loc = sreloc->contents;
1649 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1650 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1651 ++sreloc->reloc_count;
1652
1653 /* If this reloc is against an external symbol, we do
1654 not want to fiddle with the addend. Otherwise, we
1655 need to include the symbol value so that it becomes
1656 an addend for the dynamic reloc. */
1657 if (! relocate)
1658 continue;
1659 }
1660 break;
1661
1662 case R_METAG_RELBRANCH_PLT:
1663 /* Relocation is to the entry for this symbol in the
1664 procedure linkage table. */
1665
1666 if (hh == NULL)
1667 break;
1668
1669 if (hh->eh.forced_local)
1670 break;
1671
1672 if (hh->eh.plt.offset == (bfd_vma) -1 ||
1673 htab->splt == NULL)
1674 {
1675 /* We didn't make a PLT entry for this symbol. This
1676 happens when statically linking PIC code, or when
1677 using -Bsymbolic. */
1678 break;
1679 }
1680
1681 relocation = (htab->splt->output_section->vma
1682 + htab->splt->output_offset
1683 + hh->eh.plt.offset);
1684 break;
1685 case R_METAG_HI16_GOTPC:
1686 case R_METAG_LO16_GOTPC:
1687 BFD_ASSERT (htab->sgot != NULL);
1688
1689 relocation = (htab->sgot->output_section->vma +
1690 htab->sgot->output_offset);
1691 relocation += GOT_REG_OFFSET;
1692 relocation -= (input_section->output_section->vma
1693 + input_section->output_offset
1694 + rel->r_offset);
1695 break;
1696 case R_METAG_HI16_GOTOFF:
1697 case R_METAG_LO16_GOTOFF:
1698 case R_METAG_GETSET_GOTOFF:
1699 BFD_ASSERT (htab->sgot != NULL);
1700
1701 relocation -= (htab->sgot->output_section->vma +
1702 htab->sgot->output_offset);
1703 relocation -= GOT_REG_OFFSET;
1704 break;
1705 case R_METAG_GETSET_GOT:
1706 {
1707 bfd_vma off;
1708 bfd_boolean do_got = 0;
1709
1710 /* Relocation is to the entry for this symbol in the
1711 global offset table. */
1712 if (hh != NULL)
1713 {
1714 bfd_boolean dyn;
1715
1716 off = hh->eh.got.offset;
1717 dyn = htab->etab.dynamic_sections_created;
1718 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
1719 &hh->eh))
1720 {
1721 /* If we aren't going to call finish_dynamic_symbol,
1722 then we need to handle initialisation of the .got
1723 entry and create needed relocs here. Since the
1724 offset must always be a multiple of 4, we use the
1725 least significant bit to record whether we have
1726 initialised it already. */
1727 if ((off & 1) != 0)
1728 off &= ~1;
1729 else
1730 {
1731 hh->eh.got.offset |= 1;
1732 do_got = 1;
1733 }
1734 }
1735 }
1736 else
1737 {
1738 /* Local symbol case. */
1739 if (local_got_offsets == NULL)
1740 abort ();
1741
1742 off = local_got_offsets[r_symndx];
1743
1744 /* The offset must always be a multiple of 4. We use
1745 the least significant bit to record whether we have
1746 already generated the necessary reloc. */
1747 if ((off & 1) != 0)
1748 off &= ~1;
1749 else
1750 {
1751 local_got_offsets[r_symndx] |= 1;
1752 do_got = 1;
1753 }
1754 }
1755
1756 if (do_got)
1757 {
1758 if (info->shared)
1759 {
1760 /* Output a dynamic relocation for this GOT entry.
1761 In this case it is relative to the base of the
1762 object because the symbol index is zero. */
1763 Elf_Internal_Rela outrel;
1764 bfd_byte *loc;
1765 asection *s = htab->srelgot;
1766
1767 outrel.r_offset = (off
1768 + htab->sgot->output_offset
1769 + htab->sgot->output_section->vma);
1770 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1771 outrel.r_addend = relocation;
1772 loc = s->contents;
1773 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1774 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1775 }
1776 else
1777 bfd_put_32 (output_bfd, relocation,
1778 htab->sgot->contents + off);
1779 }
1780
1781 if (off >= (bfd_vma) -2)
1782 abort ();
1783
1784 relocation = off - GOT_REG_OFFSET;
1785 }
1786 break;
1787 case R_METAG_TLS_GD:
1788 case R_METAG_TLS_IE:
1789 {
1790 /* XXXMJF There is room here for optimisations. For example
1791 converting from GD->IE, etc. */
1792 bfd_vma off;
1793 int indx;
1794 char tls_type;
1795
1796 if (htab->sgot == NULL)
1797 abort();
1798
1799 indx = 0;
1800 if (hh != NULL)
1801 {
1802 bfd_boolean dyn;
1803 dyn = htab->etab.dynamic_sections_created;
1804
1805 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, &hh->eh)
1806 && (!info->shared
1807 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1808 {
1809 indx = hh->eh.dynindx;
1810 }
1811 off = hh->eh.got.offset;
1812 tls_type = hh->tls_type;
1813 }
1814 else
1815 {
1816 /* Local symbol case. */
1817 if (local_got_offsets == NULL)
1818 abort ();
1819
1820 off = local_got_offsets[r_symndx];
1821 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1822 }
1823
1824 if (tls_type == GOT_UNKNOWN)
1825 abort();
1826
1827 if ((off & 1) != 0)
1828 off &= ~1;
1829 else
1830 {
1831 bfd_boolean need_relocs = FALSE;
1832 Elf_Internal_Rela outrel;
1833 bfd_byte *loc = NULL;
1834 int cur_off = off;
1835
1836 /* The GOT entries have not been initialized yet. Do it
1837 now, and emit any relocations. If both an IE GOT and a
1838 GD GOT are necessary, we emit the GD first. */
1839
1840 if ((info->shared || indx != 0)
1841 && (hh == NULL
1842 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1843 || hh->eh.root.type != bfd_link_hash_undefweak))
1844 {
1845 need_relocs = TRUE;
1846 loc = htab->srelgot->contents;
1847 /* FIXME (CAO): Should this be reloc_count++ ? */
1848 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
1849 }
1850
1851 if (tls_type & GOT_TLS_GD)
1852 {
1853 if (need_relocs)
1854 {
1855 outrel.r_offset = (cur_off
1856 + htab->sgot->output_section->vma
1857 + htab->sgot->output_offset);
1858 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1859 outrel.r_addend = 0;
1860 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
1861
1862 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1863 htab->srelgot->reloc_count++;
1864 loc += sizeof (Elf32_External_Rela);
1865
1866 if (indx == 0)
1867 bfd_put_32 (output_bfd, 0,
1868 htab->sgot->contents + cur_off + 4);
1869 else
1870 {
1871 bfd_put_32 (output_bfd, 0,
1872 htab->sgot->contents + cur_off + 4);
1873 outrel.r_info = ELF32_R_INFO (indx,
1874 R_METAG_TLS_DTPOFF);
1875 outrel.r_offset += 4;
1876 bfd_elf32_swap_reloca_out (output_bfd,
1877 &outrel, loc);
1878 htab->srelgot->reloc_count++;
1879 loc += sizeof (Elf32_External_Rela);
1880 }
1881 }
1882 else
1883 {
1884 /* We don't support changing the TLS model. */
1885 abort ();
1886 }
1887
1888 cur_off += 8;
1889 }
1890
1891 if (tls_type & GOT_TLS_IE)
1892 {
1893 if (need_relocs)
1894 {
1895 outrel.r_offset = (cur_off
1896 + htab->sgot->output_section->vma
1897 + htab->sgot->output_offset);
1898 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1899
1900 if (indx == 0)
1901 outrel.r_addend = relocation - dtpoff_base (info);
1902 else
1903 outrel.r_addend = 0;
1904
1905 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1906 htab->srelgot->reloc_count++;
1907 loc += sizeof (Elf32_External_Rela);
1908 }
1909 else
1910 bfd_put_32 (output_bfd, tpoff (info, relocation),
1911 htab->sgot->contents + cur_off);
1912
1913 cur_off += 4;
1914 }
1915
1916 if (hh != NULL)
1917 hh->eh.got.offset |= 1;
1918 else
1919 local_got_offsets[r_symndx] |= 1;
1920 }
1921
1922 /* Add the base of the GOT to the relocation value. */
1923 relocation = off - GOT_REG_OFFSET;
1924
1925 break;
1926 }
1927
1928 case R_METAG_TLS_IENONPIC_HI16:
1929 case R_METAG_TLS_IENONPIC_LO16:
1930 case R_METAG_TLS_LE_HI16:
1931 case R_METAG_TLS_LE_LO16:
1932 if (info->shared)
1933 {
1934 (*_bfd_error_handler)
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 (! info->shared)
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->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->sgot->output_section->vma
1966 + htab->sgot->output_offset);
1967
1968 outrel.r_addend = 0;
1969 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1970 loc = htab->srelgot->contents;
1971 loc += htab->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 r = 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 r = info->callbacks->undefined_symbol
2001 (info, name, input_bfd, input_section, rel->r_offset,
2002 TRUE);
2003 break;
2004
2005 case bfd_reloc_outofrange:
2006 msg = _("internal error: out of range error");
2007 break;
2008
2009 case bfd_reloc_notsupported:
2010 msg = _("internal error: unsupported relocation error");
2011 break;
2012
2013 case bfd_reloc_dangerous:
2014 msg = _("internal error: dangerous relocation");
2015 break;
2016
2017 default:
2018 msg = _("internal error: unknown error");
2019 break;
2020 }
2021
2022 if (msg)
2023 r = info->callbacks->warning
2024 (info, msg, name, input_bfd, input_section, rel->r_offset);
2025
2026 if (! r)
2027 return FALSE;
2028 }
2029 }
2030
2031 return TRUE;
2032}
2033
2034/* Create the .plt and .got sections, and set up our hash table
2035 short-cuts to various dynamic sections. */
2036
2037static bfd_boolean
2038elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2039{
2040 struct elf_metag_link_hash_table *htab;
2041 struct elf_link_hash_entry *eh;
2042 struct bfd_link_hash_entry *bh;
2043 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2044
2045 /* Don't try to create the .plt and .got twice. */
2046 htab = metag_link_hash_table (info);
2047 if (htab->splt != NULL)
2048 return TRUE;
2049
2050 /* Call the generic code to do most of the work. */
2051 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2052 return FALSE;
2053
2054 htab->sgot = bfd_get_section_by_name (abfd, ".got");
2055 if (! htab->sgot)
2056 return FALSE;
2057
2058 htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt",
2059 (SEC_ALLOC | SEC_LOAD |
2060 SEC_HAS_CONTENTS |
2061 SEC_IN_MEMORY |
2062 SEC_LINKER_CREATED));
2063 if (htab->sgotplt == NULL
2064 || !bfd_set_section_alignment (abfd, htab->sgotplt, 2))
2065 return FALSE;
2066
2067 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2068 section. We don't do this in the linker script because we don't want
2069 to define the symbol if we are not creating a global offset table. */
2070 bh = NULL;
2071 if (!(_bfd_generic_link_add_one_symbol
2072 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot,
2073 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2074 return FALSE;
2075 eh = (struct elf_link_hash_entry *) bh;
2076 eh->def_regular = 1;
2077 eh->type = STT_OBJECT;
2078 eh->other = STV_HIDDEN;
2079
2080 if (! info->executable
2081 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2082 return FALSE;
2083
2084 elf_hash_table (info)->hgot = eh;
2085
2086 htab->splt = bfd_get_section_by_name (abfd, ".plt");
2087 htab->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
2088
2089 htab->srelgot = bfd_get_section_by_name (abfd, ".rela.got");
2090
2091 htab->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
2092 htab->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
2093
2094 return TRUE;
2095}
2096
2097/* Look through the relocs for a section during the first phase, and
2098 calculate needed space in the global offset table, procedure linkage
2099 table, and dynamic reloc sections. At this point we haven't
2100 necessarily read all the input files. */
2101
2102static bfd_boolean
2103elf_metag_check_relocs (bfd *abfd,
2104 struct bfd_link_info *info,
2105 asection *sec,
2106 const Elf_Internal_Rela *relocs)
2107{
2108 Elf_Internal_Shdr *symtab_hdr;
2109 struct elf_link_hash_entry **eh_syms;
2110 const Elf_Internal_Rela *rel;
2111 const Elf_Internal_Rela *rel_end;
2112 struct elf_metag_link_hash_table *htab;
2113 asection *sreloc;
2114 bfd *dynobj;
2115 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2116
2117 if (info->relocatable)
2118 return TRUE;
2119
2120 htab = metag_link_hash_table (info);
2121 dynobj = htab->etab.dynobj;
2122 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2123 eh_syms = elf_sym_hashes (abfd);
2124 sreloc = NULL;
2125
2126 if (htab == NULL)
2127 return FALSE;
2128
2129 rel_end = relocs + sec->reloc_count;
2130 for (rel = relocs; rel < rel_end; rel++)
2131 {
2132 int r_type;
2133 struct elf_metag_link_hash_entry *hh;
2134 unsigned long r_symndx;
2135
2136 r_symndx = ELF32_R_SYM (rel->r_info);
2137 r_type = ELF32_R_TYPE (rel->r_info);
2138 if (r_symndx < symtab_hdr->sh_info)
2139 hh = NULL;
2140 else
2141 {
2142 hh = (struct elf_metag_link_hash_entry *)
2143 eh_syms[r_symndx - symtab_hdr->sh_info];
2144 while (hh->eh.root.type == bfd_link_hash_indirect
2145 || hh->eh.root.type == bfd_link_hash_warning)
2146 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2147 }
2148
2149 /* Some relocs require a global offset table. */
2150 if (htab->sgot == NULL)
2151 {
2152 switch (r_type)
2153 {
2154 case R_METAG_TLS_GD:
2155 case R_METAG_TLS_LDM:
2156 case R_METAG_TLS_IE:
2157 if (info->shared)
2158 info->flags |= DF_STATIC_TLS;
2159 /* Fall through. */
2160
2161 case R_METAG_HI16_GOTOFF:
2162 case R_METAG_LO16_GOTOFF:
2163 case R_METAG_GETSET_GOTOFF:
2164 case R_METAG_GETSET_GOT:
2165 case R_METAG_HI16_GOTPC:
2166 case R_METAG_LO16_GOTPC:
2167 if (dynobj == NULL)
2168 htab->etab.dynobj = dynobj = abfd;
2169 if (!elf_metag_create_dynamic_sections (dynobj, info))
2170 return FALSE;
2171 break;
2172
2173 default:
2174 break;
2175 }
2176 }
2177
2178 switch (r_type)
2179 {
2180 case R_METAG_TLS_IE:
2181 case R_METAG_TLS_GD:
2182 case R_METAG_GETSET_GOT:
2183 switch (r_type)
2184 {
2185 default:
2186 tls_type = GOT_NORMAL;
2187 break;
2188 case R_METAG_TLS_IE:
2189 tls_type = GOT_TLS_IE;
2190 break;
2191 case R_METAG_TLS_GD:
2192 tls_type = GOT_TLS_GD;
2193 break;
2194 }
2195
2196 if (hh != NULL)
2197 {
2198 hh->eh.got.refcount += 1;
2199 old_tls_type = hh->tls_type;
2200 }
2201 else
2202 {
2203 bfd_signed_vma *local_got_refcounts;
2204
2205 /* This is a global offset table entry for a local
2206 symbol. */
2207 local_got_refcounts = elf_local_got_refcounts (abfd);
2208 if (local_got_refcounts == NULL)
2209 {
2210 bfd_size_type size;
2211
2212 size = symtab_hdr->sh_info;
2213 size *= sizeof (bfd_signed_vma);
2214 /* Add in space to store the local GOT TLS types. */
2215 size += symtab_hdr->sh_info;
2216 local_got_refcounts = ((bfd_signed_vma *)
2217 bfd_zalloc (abfd, size));
2218 if (local_got_refcounts == NULL)
2219 return FALSE;
2220 elf_local_got_refcounts (abfd) = local_got_refcounts;
2221 memset (metag_elf_local_got_tls_type (abfd),
2222 GOT_UNKNOWN, symtab_hdr->sh_info);
2223 }
2224 local_got_refcounts[r_symndx] += 1;
2225 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2226 }
2227
2228 if (old_tls_type != tls_type)
2229 {
2230 if (hh != NULL)
2231 {
2232 hh->tls_type = tls_type;
2233 }
2234 else
2235 {
2236 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2237 }
2238 }
2239
2240 break;
2241
2242 case R_METAG_TLS_LDM:
2243 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2244 break;
2245
2246 case R_METAG_RELBRANCH_PLT:
2247 /* This symbol requires a procedure linkage table entry. We
2248 actually build the entry in adjust_dynamic_symbol,
2249 because this might be a case of linking PIC code without
2250 linking in any dynamic objects, in which case we don't
2251 need to generate a procedure linkage table after all. */
2252
2253 /* If this is a local symbol, we resolve it directly without
2254 creating a procedure linkage table entry. */
2255 if (hh == NULL)
2256 continue;
2257
2258 if (hh->eh.forced_local)
2259 break;
2260
2261 hh->eh.needs_plt = 1;
2262 hh->eh.plt.refcount += 1;
2263 break;
2264
2265 case R_METAG_ADDR32:
2266 case R_METAG_HIADDR16:
2267 case R_METAG_LOADDR16:
2268 case R_METAG_RELBRANCH:
2269 case R_METAG_GETSETOFF:
2270 if (hh != NULL && !info->shared)
2271 {
2272 hh->eh.non_got_ref = 1;
2273 hh->eh.plt.refcount += 1;
2274 }
2275
2276 /* If we are creating a shared library, and this is a reloc
2277 against a global symbol, or a non PC relative reloc
2278 against a local symbol, then we need to copy the reloc
2279 into the shared library. However, if we are linking with
2280 -Bsymbolic, we do not need to copy a reloc against a
2281 global symbol which is defined in an object we are
2282 including in the link (i.e., DEF_REGULAR is set). At
2283 this point we have not seen all the input files, so it is
2284 possible that DEF_REGULAR is not set now but will be set
2285 later (it is never cleared). We account for that
2286 possibility below by storing information in the
2287 dyn_relocs field of the hash table entry. A similar
2288 situation occurs when creating shared libraries and symbol
2289 visibility changes render the symbol local.
2290
2291 If on the other hand, we are creating an executable, we
2292 may need to keep relocations for symbols satisfied by a
2293 dynamic library if we manage to avoid copy relocs for the
2294 symbol. */
2295 if ((info->shared
2296 && (sec->flags & SEC_ALLOC) != 0
2297 && (r_type != R_METAG_RELBRANCH
2298 || (hh != NULL
2299 && (! info->symbolic
2300 || hh->eh.root.type == bfd_link_hash_defweak
2301 || !hh->eh.def_regular))))
2302 || (!info->shared
2303 && (sec->flags & SEC_ALLOC) != 0
2304 && hh != NULL
2305 && (hh->eh.root.type == bfd_link_hash_defweak
2306 || !hh->eh.def_regular)))
2307 {
2308 struct elf_metag_dyn_reloc_entry *hdh_p;
2309 struct elf_metag_dyn_reloc_entry **hdh_head;
2310
2311 if (dynobj == NULL)
2312 htab->etab.dynobj = dynobj = abfd;
2313
2314 /* When creating a shared object, we must copy these
2315 relocs into the output file. We create a reloc
2316 section in dynobj and make room for the reloc. */
2317 if (sreloc == NULL)
2318 {
2319 sreloc = _bfd_elf_make_dynamic_reloc_section
2320 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2321
2322 if (sreloc == NULL)
2323 {
2324 bfd_set_error (bfd_error_bad_value);
2325 return FALSE;
2326 }
2327
2328 elf_section_data (sec)->sreloc = sreloc;
2329 }
2330
2331 /* If this is a global symbol, we count the number of
2332 relocations we need for this symbol. */
2333 if (hh != NULL)
2334 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2335 else
2336 {
2337 /* Track dynamic relocs needed for local syms too. */
2338 asection *sr;
2339 void *vpp;
2340 Elf_Internal_Sym *isym;
2341
2342 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2343 abfd, r_symndx);
2344 if (isym == NULL)
2345 return FALSE;
2346
2347 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2348 if (sr == NULL)
2349 sr = sec;
2350
2351 vpp = &elf_section_data (sr)->local_dynrel;
2352 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2353 }
2354
2355 hdh_p = *hdh_head;
2356 if (hdh_p == NULL || hdh_p->sec != sec)
2357 {
2358 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2359 bfd_alloc (dynobj, sizeof *hdh_p));
2360 if (hdh_p == NULL)
2361 return FALSE;
2362 hdh_p->hdh_next = *hdh_head;
2363 *hdh_head = hdh_p;
2364 hdh_p->sec = sec;
2365 hdh_p->count = 0;
2366 hdh_p->relative_count = 0;
2367 }
2368
2369 hdh_p->count += 1;
2370 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2371 hdh_p->relative_count += 1;
2372 }
2373 break;
2374
2375 /* This relocation describes the C++ object vtable hierarchy.
2376 Reconstruct it for later use during GC. */
2377 case R_METAG_GNU_VTINHERIT:
2378 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2379 rel->r_offset))
2380 return FALSE;
2381 break;
2382
2383 /* This relocation describes which C++ vtable entries are actually
2384 used. Record for later use during GC. */
2385 case R_METAG_GNU_VTENTRY:
2386 BFD_ASSERT (hh != NULL);
2387 if (hh != NULL
2388 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2389 return FALSE;
2390 break;
2391 }
2392 }
2393
2394 return TRUE;
2395}
2396
2397/* Copy the extra info we tack onto an elf_link_hash_entry. */
2398
2399static void
2400elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2401 struct elf_link_hash_entry *eh_dir,
2402 struct elf_link_hash_entry *eh_ind)
2403{
2404 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2405
2406 hh_dir = metag_elf_hash_entry (eh_dir);
2407 hh_ind = metag_elf_hash_entry (eh_ind);
2408
2409 if (hh_ind->dyn_relocs != NULL)
2410 {
2411 if (hh_dir->dyn_relocs != NULL)
2412 {
2413 struct elf_metag_dyn_reloc_entry **hdh_pp;
2414 struct elf_metag_dyn_reloc_entry *hdh_p;
2415
2416 if (eh_ind->root.type == bfd_link_hash_indirect)
2417 abort ();
2418
2419 /* Add reloc counts against the weak sym to the strong sym
2420 list. Merge any entries against the same section. */
2421 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2422 {
2423 struct elf_metag_dyn_reloc_entry *hdh_q;
2424
2425 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2426 hdh_q = hdh_q->hdh_next)
2427 if (hdh_q->sec == hdh_p->sec)
2428 {
2429 hdh_q->relative_count += hdh_p->relative_count;
2430 hdh_q->count += hdh_p->count;
2431 *hdh_pp = hdh_p->hdh_next;
2432 break;
2433 }
2434 if (hdh_q == NULL)
2435 hdh_pp = &hdh_p->hdh_next;
2436 }
2437 *hdh_pp = hh_dir->dyn_relocs;
2438 }
2439
2440 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2441 hh_ind->dyn_relocs = NULL;
2442 }
2443
2444 if (eh_ind->root.type == bfd_link_hash_indirect
2445 && eh_dir->got.refcount <= 0)
2446 {
2447 hh_dir->tls_type = hh_ind->tls_type;
2448 hh_ind->tls_type = GOT_UNKNOWN;
2449 }
2450
2451 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2452}
2453
2454/* Adjust a symbol defined by a dynamic object and referenced by a
2455 regular object. The current definition is in some section of the
2456 dynamic object, but we're not including those sections. We have to
2457 change the definition to something the rest of the link can
2458 understand. */
2459
2460static bfd_boolean
2461elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2462 struct elf_link_hash_entry *eh)
2463{
2464 struct elf_metag_link_hash_table *htab;
2465 struct elf_metag_link_hash_entry *hh;
2466 struct elf_metag_dyn_reloc_entry *hdh_p;
2467 asection *s;
2468
2469 /* If this is a function, put it in the procedure linkage table. We
2470 will fill in the contents of the procedure linkage table later,
2471 when we know the address of the .got section. */
2472 if (eh->type == STT_FUNC
2473 || eh->needs_plt)
2474 {
2475 if (eh->plt.refcount <= 0
2476 || SYMBOL_CALLS_LOCAL (info, eh)
2477 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2478 && eh->root.type == bfd_link_hash_undefweak))
2479 {
2480 /* This case can occur if we saw a PLT reloc in an input
2481 file, but the symbol was never referred to by a dynamic
2482 object. In such a case, we don't actually need to build
2483 a procedure linkage table, and we can just do a PCREL
2484 reloc instead. */
2485 eh->plt.offset = (bfd_vma) -1;
2486 eh->needs_plt = 0;
2487 }
2488
2489 return TRUE;
2490 }
2491 else
2492 eh->plt.offset = (bfd_vma) -1;
2493
2494 /* If this is a weak symbol, and there is a real definition, the
2495 processor independent code will have arranged for us to see the
2496 real definition first, and we can just use the same value. */
2497 if (eh->u.weakdef != NULL)
2498 {
2499 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2500 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2501 abort ();
2502 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2503 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2504 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2505 return TRUE;
2506 }
2507
2508 /* This is a reference to a symbol defined by a dynamic object which
2509 is not a function. */
2510
2511 /* If we are creating a shared library, we must presume that the
2512 only references to the symbol are via the global offset table.
2513 For such cases we need not do anything here; the relocations will
2514 be handled correctly by relocate_section. */
2515 if (info->shared)
2516 return TRUE;
2517
2518 /* If there are no references to this symbol that do not use the
2519 GOT, we don't need to generate a copy reloc. */
2520 if (!eh->non_got_ref)
2521 return TRUE;
2522
2523 /* If -z nocopyreloc was given, we won't generate them either. */
2524 if (info->nocopyreloc)
2525 {
2526 eh->non_got_ref = 0;
2527 return TRUE;
2528 }
2529
2530 hh = (struct elf_metag_link_hash_entry *) eh;
2531 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2532 {
2533 s = hdh_p->sec->output_section;
2534 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2535 break;
2536 }
2537
2538 /* If we didn't find any dynamic relocs in read-only sections, then
2539 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2540 if (hdh_p == NULL)
2541 {
2542 eh->non_got_ref = 0;
2543 return TRUE;
2544 }
2545
2546 if (eh->size == 0)
2547 {
2548 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2549 hh->eh.root.root.string);
2550 return TRUE;
2551 }
2552
2553 /* We must allocate the symbol in our .dynbss section, which will
2554 become part of the .bss section of the executable. There will be
2555 an entry for this symbol in the .dynsym section. The dynamic
2556 object will contain position independent code, so all references
2557 from the dynamic object to this symbol will go through the global
2558 offset table. The dynamic linker will use the .dynsym entry to
2559 determine the address it must put in the global offset table, so
2560 both the dynamic object and the regular object will refer to the
2561 same memory location for the variable. */
2562
2563 htab = metag_link_hash_table (info);
2564
2565 /* We must generate a COPY reloc to tell the dynamic linker to
2566 copy the initial value out of the dynamic object and into the
2567 runtime process image. */
2568 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0)
2569 {
2570 htab->srelbss->size += sizeof (Elf32_External_Rela);
2571 eh->needs_copy = 1;
2572 }
2573
2574 s = htab->sdynbss;
2575
2576 return _bfd_elf_adjust_dynamic_copy (eh, s);
2577}
2578
2579/* Allocate space in .plt, .got and associated reloc sections for
2580 global syms. */
2581
2582static bfd_boolean
2583allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2584{
2585 struct bfd_link_info *info;
2586 struct elf_metag_link_hash_table *htab;
2587 struct elf_metag_link_hash_entry *hh;
2588 struct elf_metag_dyn_reloc_entry *hdh_p;
2589
2590 if (eh->root.type == bfd_link_hash_indirect)
2591 return TRUE;
2592
2593 if (eh->root.type == bfd_link_hash_warning)
2594 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2595
2596 info = inf;
2597 htab = metag_link_hash_table (info);
2598
2599 if (htab->etab.dynamic_sections_created
2600 && eh->plt.refcount > 0)
2601 {
2602 /* Make sure this symbol is output as a dynamic symbol.
2603 Undefined weak syms won't yet be marked as dynamic. */
2604 if (eh->dynindx == -1
2605 && !eh->forced_local)
2606 {
2607 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2608 return FALSE;
2609 }
2610
2611 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, eh))
2612 {
2613 asection *s = htab->splt;
2614
2615 /* If this is the first .plt entry, make room for the special
2616 first entry. */
2617 if (s->size == 0)
2618 s->size += PLT_ENTRY_SIZE;
2619
2620 eh->plt.offset = s->size;
2621
2622 /* If this symbol is not defined in a regular file, and we are
2623 not generating a shared library, then set the symbol to this
2624 location in the .plt. This is required to make function
2625 pointers compare as equal between the normal executable and
2626 the shared library. */
2627 if (! info->shared
2628 && !eh->def_regular)
2629 {
2630 eh->root.u.def.section = s;
2631 eh->root.u.def.value = eh->plt.offset;
2632 }
2633
2634 /* Make room for this entry. */
2635 s->size += PLT_ENTRY_SIZE;
2636
2637 /* We also need to make an entry in the .got.plt section, which
2638 will be placed in the .got section by the linker script. */
2639 htab->sgotplt->size += 4;
2640
2641 /* We also need to make an entry in the .rel.plt section. */
2642 htab->srelplt->size += sizeof (Elf32_External_Rela);
2643 }
2644 else
2645 {
2646 eh->plt.offset = (bfd_vma) -1;
2647 eh->needs_plt = 0;
2648 }
2649 }
2650 else
2651 {
2652 eh->plt.offset = (bfd_vma) -1;
2653 eh->needs_plt = 0;
2654 }
2655
2656 if (eh->got.refcount > 0)
2657 {
2658 asection *s;
2659 bfd_boolean dyn;
2660 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2661
2662 /* Make sure this symbol is output as a dynamic symbol.
2663 Undefined weak syms won't yet be marked as dynamic. */
2664 if (eh->dynindx == -1
2665 && !eh->forced_local)
2666 {
2667 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2668 return FALSE;
2669 }
2670
2671 s = htab->sgot;
2672
2673 eh->got.offset = s->size;
2674 s->size += 4;
2675 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2676 if (tls_type == GOT_TLS_GD)
2677 s->size += 4;
2678 dyn = htab->etab.dynamic_sections_created;
2679 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2680 R_METAG_TLS_GD needs one if local symbol and two if global. */
2681 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2682 || (tls_type == GOT_TLS_IE && dyn))
2683 htab->srelgot->size += sizeof (Elf32_External_Rela);
2684 else if (tls_type == GOT_TLS_GD)
2685 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2686 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, eh))
2687 htab->srelgot->size += sizeof (Elf32_External_Rela);
2688 }
2689 else
2690 eh->got.offset = (bfd_vma) -1;
2691
2692 hh = (struct elf_metag_link_hash_entry *) eh;
2693 if (hh->dyn_relocs == NULL)
2694 return TRUE;
2695
2696 /* If this is a -Bsymbolic shared link, then we need to discard all
2697 space allocated for dynamic pc-relative relocs against symbols
2698 defined in a regular object. For the normal shared case, discard
2699 space for relocs that have become local due to symbol visibility
2700 changes. */
2701 if (info->shared)
2702 {
2703 if (SYMBOL_CALLS_LOCAL (info, eh))
2704 {
2705 struct elf_metag_dyn_reloc_entry **hdh_pp;
2706
2707 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2708 {
2709 hdh_p->count -= hdh_p->relative_count;
2710 hdh_p->relative_count = 0;
2711 if (hdh_p->count == 0)
2712 *hdh_pp = hdh_p->hdh_next;
2713 else
2714 hdh_pp = &hdh_p->hdh_next;
2715 }
2716 }
2717
2718 /* Also discard relocs on undefined weak syms with non-default
2719 visibility. */
2720 if (hh->dyn_relocs != NULL
2721 && eh->root.type == bfd_link_hash_undefweak)
2722 {
2723 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2724 hh->dyn_relocs = NULL;
2725
2726 /* Make sure undefined weak symbols are output as a dynamic
2727 symbol in PIEs. */
2728 else if (eh->dynindx == -1
2729 && !eh->forced_local)
2730 {
2731 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2732 return FALSE;
2733 }
2734 }
2735 }
2736 else
2737 {
2738 /* For the non-shared case, discard space for relocs against
2739 symbols which turn out to need copy relocs or are not
2740 dynamic. */
2741 if (!eh->non_got_ref
2742 && ((eh->def_dynamic
2743 && !eh->def_regular)
2744 || (htab->etab.dynamic_sections_created
2745 && (eh->root.type == bfd_link_hash_undefweak
2746 || eh->root.type == bfd_link_hash_undefined))))
2747 {
2748 /* Make sure this symbol is output as a dynamic symbol.
2749 Undefined weak syms won't yet be marked as dynamic. */
2750 if (eh->dynindx == -1
2751 && !eh->forced_local)
2752 {
2753 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2754 return FALSE;
2755 }
2756
2757 /* If that succeeded, we know we'll be keeping all the
2758 relocs. */
2759 if (eh->dynindx != -1)
2760 goto keep;
2761 }
2762
2763 hh->dyn_relocs = NULL;
2764 return TRUE;
2765
2766 keep: ;
2767 }
2768
2769 /* Finally, allocate space. */
2770 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2771 {
2772 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2773 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2774 }
2775
2776 return TRUE;
2777}
2778
2779/* Find any dynamic relocs that apply to read-only sections. */
2780
2781static bfd_boolean
2782readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2783{
2784 struct elf_metag_link_hash_entry *hh;
2785 struct elf_metag_dyn_reloc_entry *hdh_p;
2786
2787 if (eh->root.type == bfd_link_hash_warning)
2788 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2789
2790 hh = (struct elf_metag_link_hash_entry *) eh;
2791 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2792 {
2793 asection *s = hdh_p->sec->output_section;
2794
2795 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2796 {
2797 struct bfd_link_info *info = inf;
2798
2799 info->flags |= DF_TEXTREL;
2800
2801 /* Not an error, just cut short the traversal. */
2802 return FALSE;
2803 }
2804 }
2805 return TRUE;
2806}
2807
2808/* Set the sizes of the dynamic sections. */
2809
2810static bfd_boolean
2811elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2812 struct bfd_link_info *info)
2813{
2814 struct elf_metag_link_hash_table *htab;
2815 bfd *dynobj;
2816 bfd *ibfd;
2817 asection *s;
2818 bfd_boolean relocs;
2819
2820 htab = metag_link_hash_table (info);
2821 dynobj = htab->etab.dynobj;
2822 if (dynobj == NULL)
2823 abort ();
2824
2825 if (htab->etab.dynamic_sections_created)
2826 {
2827 /* Set the contents of the .interp section to the interpreter. */
2828 if (info->executable)
2829 {
2830 s = bfd_get_section_by_name (dynobj, ".interp");
2831 if (s == NULL)
2832 abort ();
2833 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2834 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2835 }
2836 }
2837
2838 /* Set up .got offsets for local syms, and space for local dynamic
2839 relocs. */
2840 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2841 {
2842 bfd_signed_vma *local_got;
2843 bfd_signed_vma *end_local_got;
2844 bfd_size_type locsymcount;
2845 Elf_Internal_Shdr *symtab_hdr;
2846 asection *srel;
2847 char *local_tls_type;
2848
2849 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2850 continue;
2851
2852 for (s = ibfd->sections; s != NULL; s = s->next)
2853 {
2854 struct elf_metag_dyn_reloc_entry *hdh_p;
2855
2856 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2857 elf_section_data (s)->local_dynrel);
2858 hdh_p != NULL;
2859 hdh_p = hdh_p->hdh_next)
2860 {
2861 if (!bfd_is_abs_section (hdh_p->sec)
2862 && bfd_is_abs_section (hdh_p->sec->output_section))
2863 {
2864 /* Input section has been discarded, either because
2865 it is a copy of a linkonce section or due to
2866 linker script /DISCARD/, so we'll be discarding
2867 the relocs too. */
2868 }
2869 else if (hdh_p->count != 0)
2870 {
2871 srel = elf_section_data (hdh_p->sec)->sreloc;
2872 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2873 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2874 info->flags |= DF_TEXTREL;
2875 }
2876 }
2877 }
2878
2879 local_got = elf_local_got_refcounts (ibfd);
2880 if (!local_got)
2881 continue;
2882
2883 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2884 locsymcount = symtab_hdr->sh_info;
2885 end_local_got = local_got + locsymcount;
2886 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2887 s = htab->sgot;
2888 srel = htab->srelgot;
2889 for (; local_got < end_local_got; ++local_got)
2890 {
2891 if (*local_got > 0)
2892 {
2893 *local_got = s->size;
2894 s->size += GOT_ENTRY_SIZE;
2895 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2896 if (*local_tls_type == GOT_TLS_GD)
2897 s->size += 4;
2898 if (info->shared)
2899 srel->size += sizeof (Elf32_External_Rela);
2900 }
2901 else
2902 *local_got = (bfd_vma) -1;
2903 ++local_tls_type;
2904 }
2905 }
2906
2907 if (htab->tls_ldm_got.refcount > 0)
2908 {
2909 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2910 reloc. */
2911 htab->tls_ldm_got.offset = htab->sgot->size;
2912 htab->sgot->size += 8;
2913 htab->srelgot->size += sizeof (Elf32_External_Rela);
2914 }
2915 else
2916 htab->tls_ldm_got.offset = -1;
2917
2918 /* Allocate global sym .plt and .got entries, and space for global
2919 sym dynamic relocs. */
2920 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2921
2922 /* We now have determined the sizes of the various dynamic sections.
2923 Allocate memory for them. */
2924 relocs = FALSE;
2925 for (s = dynobj->sections; s != NULL; s = s->next)
2926 {
2927 bfd_boolean reloc_section = FALSE;
2928
2929 if ((s->flags & SEC_LINKER_CREATED) == 0)
2930 continue;
2931
2932 if (s == htab->splt
2933 || s == htab->sgot
2934 || s == htab->sgotplt
2935 || s == htab->sdynbss)
2936 {
2937 /* Strip this section if we don't need it; see the
2938 comment below. */
2939 }
2940 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2941 {
2942 if (s->size != 0 && s != htab->srelplt)
2943 relocs = TRUE;
2944
2945 /* We use the reloc_count field as a counter if we need
2946 to copy relocs into the output file. */
2947 s->reloc_count = 0;
2948 reloc_section = TRUE;
2949 }
2950 else
2951 {
2952 /* It's not one of our sections, so don't allocate space. */
2953 continue;
2954 }
2955
2956 if (s->size == 0)
2957 {
2958 /* If we don't need this section, strip it from the
2959 output file. This is mostly to handle .rela.bss and
2960 .rela.plt. We must create both sections in
2961 create_dynamic_sections, because they must be created
2962 before the linker maps input sections to output
2963 sections. The linker does that before
2964 adjust_dynamic_symbol is called, and it is that
2965 function which decides whether anything needs to go
2966 into these sections. */
2967 s->flags |= SEC_EXCLUDE;
2968 continue;
2969 }
2970
2971 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2972 continue;
2973
2974 /* Allocate memory for the section contents. */
2975 s->contents = bfd_zalloc (dynobj, s->size);
2976 if (s->contents == NULL)
2977 return FALSE;
2978 else if (reloc_section)
2979 {
2980 unsigned char *contents = s->contents;
2981 Elf32_External_Rela reloc;
2982
2983 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2984 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2985 reloc.r_info[0] = R_METAG_NONE;
2986 for (; contents < (s->contents + s->size);
2987 contents += sizeof(Elf32_External_Rela))
2988 {
2989 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
2990 }
2991 }
2992 }
2993
2994 if (htab->etab.dynamic_sections_created)
2995 {
2996 /* Add some entries to the .dynamic section. We fill in the
2997 values later, in elf_metag_finish_dynamic_sections, but we
2998 must add the entries now so that we get the correct size for
2999 the .dynamic section. The DT_DEBUG entry is filled in by the
3000 dynamic linker and used by the debugger. */
3001#define add_dynamic_entry(TAG, VAL) \
3002 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3003
3004 if (!add_dynamic_entry (DT_PLTGOT, 0))
3005 return FALSE;
3006
3007 if (info->executable)
3008 {
3009 if (!add_dynamic_entry (DT_DEBUG, 0))
3010 return FALSE;
3011 }
3012
3013 if (htab->srelplt->size != 0)
3014 {
3015 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3016 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3017 || !add_dynamic_entry (DT_JMPREL, 0))
3018 return FALSE;
3019 }
3020
3021 if (relocs)
3022 {
3023 if (!add_dynamic_entry (DT_RELA, 0)
3024 || !add_dynamic_entry (DT_RELASZ, 0)
3025 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3026 return FALSE;
3027
3028 /* If any dynamic relocs apply to a read-only section,
3029 then we need a DT_TEXTREL entry. */
3030 if ((info->flags & DF_TEXTREL) == 0)
3031 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3032
3033 if ((info->flags & DF_TEXTREL) != 0)
3034 {
3035 if (!add_dynamic_entry (DT_TEXTREL, 0))
3036 return FALSE;
3037 }
3038 }
3039 }
3040#undef add_dynamic_entry
3041
3042 return TRUE;
3043}
3044
3045/* Finish up dynamic symbol handling. We set the contents of various
3046 dynamic sections here. */
3047
3048static bfd_boolean
3049elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3050 struct bfd_link_info *info,
3051 struct elf_link_hash_entry *eh,
3052 Elf_Internal_Sym *sym)
3053{
3054 struct elf_metag_link_hash_table *htab;
3055 Elf_Internal_Rela rel;
3056 bfd_byte *loc;
3057
3058 htab = metag_link_hash_table (info);
3059
3060 if (eh->plt.offset != (bfd_vma) -1)
3061 {
3062 asection *splt;
3063 asection *sgot;
3064 asection *srela;
3065
3066 bfd_vma plt_index;
3067 bfd_vma got_offset;
3068 bfd_vma got_entry;
3069
3070 if (eh->plt.offset & 1)
3071 abort ();
3072
3073 BFD_ASSERT (eh->dynindx != -1);
3074
3075 splt = htab->splt;
3076 sgot = htab->sgotplt;
3077 srela = htab->srelplt;
3078 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3079
3080 /* Get the index in the procedure linkage table which
3081 corresponds to this symbol. This is the index of this symbol
3082 in all the symbols for which we are making plt entries. The
3083 first entry in the procedure linkage table is reserved. */
3084 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3085
3086 /* Get the offset into the .got.plt table of the entry that
3087 corresponds to this function. */
3088 got_offset = plt_index * GOT_ENTRY_SIZE;
3089
3090 BFD_ASSERT (got_offset < (1 << 16));
3091
3092 got_entry = sgot->output_section->vma
3093 + sgot->output_offset
3094 + got_offset;
3095
3096 BFD_ASSERT (plt_index < (1 << 16));
3097
3098 /* Fill in the entry in the procedure linkage table. */
3099 if (! info->shared)
3100 {
3101 bfd_put_32 (output_bfd,
3102 (plt_entry[0]
3103 | (((got_entry >> 16) & 0xffff) << 3)),
3104 splt->contents + eh->plt.offset);
3105 bfd_put_32 (output_bfd,
3106 (plt_entry[1]
3107 | ((got_entry & 0xffff) << 3)),
3108 splt->contents + eh->plt.offset + 4);
3109 bfd_put_32 (output_bfd, plt_entry[2],
3110 splt->contents + eh->plt.offset + 8);
3111 bfd_put_32 (output_bfd,
3112 (plt_entry[3] | (plt_index << 3)),
3113 splt->contents + eh->plt.offset + 12);
3114 bfd_put_32 (output_bfd,
3115 (plt_entry[4]
3116 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3117 splt->contents + eh->plt.offset + 16);
3118 }
3119 else
3120 {
3121 bfd_vma addr = got_entry - (splt->output_section->vma +
3122 splt->output_offset + eh->plt.offset);
3123
3124 bfd_put_32 (output_bfd,
3125 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3126 splt->contents + eh->plt.offset);
3127 bfd_put_32 (output_bfd,
3128 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3129 splt->contents + eh->plt.offset + 4);
3130 bfd_put_32 (output_bfd, plt_pic_entry[2],
3131 splt->contents + eh->plt.offset + 8);
3132 bfd_put_32 (output_bfd,
3133 (plt_pic_entry[3] | (plt_index << 3)),
3134 splt->contents + eh->plt.offset + 12);
3135 bfd_put_32 (output_bfd,
3136 (plt_pic_entry[4]
3137 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3138 splt->contents + eh->plt.offset + 16);
3139 }
3140
3141 /* Fill in the entry in the global offset table. */
3142 bfd_put_32 (output_bfd,
3143 (splt->output_section->vma
3144 + splt->output_offset
3145 + eh->plt.offset
3146 + 12), /* offset within PLT entry */
3147 sgot->contents + got_offset);
3148
3149 /* Fill in the entry in the .rela.plt section. */
3150 rel.r_offset = (sgot->output_section->vma
3151 + sgot->output_offset
3152 + got_offset);
3153 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3154 rel.r_addend = 0;
3155 loc = htab->srelplt->contents;
3156 loc += plt_index * sizeof(Elf32_External_Rela);
3157 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3158
3159 if (!eh->def_regular)
3160 {
3161 /* Mark the symbol as undefined, rather than as defined in
3162 the .plt section. Leave the value alone. */
3163 sym->st_shndx = SHN_UNDEF;
3164 }
3165 }
3166
3167 if (eh->got.offset != (bfd_vma) -1
3168 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3169 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3170 {
3171 /* This symbol has an entry in the global offset table. Set it
3172 up. */
3173
3174 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3175 + htab->sgot->output_offset
3176 + htab->sgot->output_section->vma);
3177
3178 /* If this is a -Bsymbolic link and the symbol is defined
3179 locally or was forced to be local because of a version file,
3180 we just want to emit a RELATIVE reloc. The entry in the
3181 global offset table will already have been initialized in the
3182 relocate_section function. */
3183 if (info->shared
3184 && (info->symbolic || eh->dynindx == -1)
3185 && eh->def_regular)
3186 {
3187 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3188 rel.r_addend = (eh->root.u.def.value
3189 + eh->root.u.def.section->output_offset
3190 + eh->root.u.def.section->output_section->vma);
3191 }
3192 else
3193 {
3194 if ((eh->got.offset & 1) != 0)
3195 abort ();
3196 bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset);
3197 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3198 rel.r_addend = 0;
3199 }
3200
3201 loc = htab->srelgot->contents;
3202 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3203 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3204 }
3205
3206 if (eh->needs_copy)
3207 {
3208 asection *s;
3209
3210 /* This symbol needs a copy reloc. Set it up. */
3211
3212 if (! (eh->dynindx != -1
3213 && (eh->root.type == bfd_link_hash_defined
3214 || eh->root.type == bfd_link_hash_defweak)))
3215 abort ();
3216
3217 s = htab->srelbss;
3218
3219 rel.r_offset = (eh->root.u.def.value
3220 + eh->root.u.def.section->output_offset
3221 + eh->root.u.def.section->output_section->vma);
3222 rel.r_addend = 0;
3223 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3224 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3225 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3226 }
3227
3228 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3229 if (eh->root.root.string[0] == '_'
3230 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3231 || eh == htab->etab.hgot))
3232 {
3233 sym->st_shndx = SHN_ABS;
3234 }
3235
3236 return TRUE;
3237}
3238
3239/* Set the Meta ELF ABI version. */
3240
3241static void
3242elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
3243{
3244 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3245
3246 i_ehdrp = elf_elfheader (abfd);
3247 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3248}
3249
3250/* Used to decide how to sort relocs in an optimal manner for the
3251 dynamic linker, before writing them out. */
3252
3253static enum elf_reloc_type_class
3254elf_metag_reloc_type_class (const Elf_Internal_Rela *rela)
3255{
3256 switch ((int) ELF32_R_TYPE (rela->r_info))
3257 {
3258 case R_METAG_RELATIVE:
3259 return reloc_class_relative;
3260 case R_METAG_JMP_SLOT:
3261 return reloc_class_plt;
3262 case R_METAG_COPY:
3263 return reloc_class_copy;
3264 default:
3265 return reloc_class_normal;
3266 }
3267}
3268
3269/* Finish up the dynamic sections. */
3270
3271static bfd_boolean
3272elf_metag_finish_dynamic_sections (bfd *output_bfd,
3273 struct bfd_link_info *info)
3274{
3275 bfd *dynobj;
3276 struct elf_metag_link_hash_table *htab;
3277 asection *sdyn;
3278
3279 htab = metag_link_hash_table (info);
3280 dynobj = htab->etab.dynobj;
3281
3282 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3283
3284 if (htab->etab.dynamic_sections_created)
3285 {
3286 asection *splt;
3287 Elf32_External_Dyn *dyncon, *dynconend;
3288
3289 if (sdyn == NULL)
3290 abort ();
3291
3292 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3293 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3294 for (; dyncon < dynconend; dyncon++)
3295 {
3296 Elf_Internal_Dyn dyn;
3297 asection *s;
3298
3299 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3300
3301 switch (dyn.d_tag)
3302 {
3303 default:
3304 continue;
3305
3306 case DT_PLTGOT:
3307 s = htab->sgot->output_section;
3308 BFD_ASSERT (s != NULL);
3309 dyn.d_un.d_ptr = s->vma + htab->sgot->output_offset;
3310 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3311 break;
3312
3313 case DT_JMPREL:
3314 s = htab->srelplt->output_section;
3315 BFD_ASSERT (s != NULL);
3316 dyn.d_un.d_ptr = s->vma;
3317 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3318 break;
3319
3320 case DT_PLTRELSZ:
3321 s = htab->srelplt;
3322 dyn.d_un.d_val = s->size;
3323 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3324 break;
3325
3326 case DT_RELASZ:
3327 /* Don't count procedure linkage table relocs in the
3328 overall reloc count. */
3329 if (htab->srelplt) {
3330 s = htab->srelplt;
3331 dyn.d_un.d_val -= s->size;
3332 }
3333 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3334 break;
3335
3336 case DT_RELA:
3337 /* We may not be using the standard ELF linker script.
3338 If .rela.plt is the first .rela section, we adjust
3339 DT_RELA to not include it. */
3340 if (htab->srelplt) {
3341 s = htab->srelplt;
3342 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3343 dyn.d_un.d_ptr += s->size;
3344 }
3345 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3346 break;
3347 }
3348
3349 }
3350
3351 /* Fill in the first entry in the procedure linkage table. */
3352 splt = htab->splt;
3353 if (splt && splt->size > 0)
3354 {
3355 unsigned long addr;
3356 /* addr = .got + 4 */
3357 addr = htab->sgot->output_section->vma +
3358 htab->sgot->output_offset + 4;
3359 if (info->shared)
3360 {
3361 addr -= splt->output_section->vma + splt->output_offset;
3362 bfd_put_32 (output_bfd,
3363 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3364 splt->contents);
3365 bfd_put_32 (output_bfd,
3366 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3367 splt->contents + 4);
3368 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3369 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3370 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3371 }
3372 else
3373 {
3374 bfd_put_32 (output_bfd,
3375 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3376 splt->contents);
3377 bfd_put_32 (output_bfd,
3378 plt0_entry[1] | ((addr & 0xffff) << 3),
3379 splt->contents + 4);
3380 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3381 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3382 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3383 }
3384
3385 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3386 PLT_ENTRY_SIZE;
3387 }
3388 }
3389
3390 if (htab->sgot != NULL && htab->sgot->size != 0)
3391 {
3392 /* Fill in the first entry in the global offset table.
3393 We use it to point to our dynamic section, if we have one. */
3394 bfd_put_32 (output_bfd,
3395 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3396 htab->sgot->contents);
3397
3398 /* The second entry is reserved for use by the dynamic linker. */
3399 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3400
3401 /* Set .got entry size. */
3402 elf_section_data (htab->sgot->output_section)
3403 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3404 }
3405
3406 return TRUE;
3407}
3408
3409/* Return the section that should be marked against GC for a given
3410 relocation. */
3411
3412static asection *
3413elf_metag_gc_mark_hook (asection *sec,
3414 struct bfd_link_info *info,
3415 Elf_Internal_Rela *rela,
3416 struct elf_link_hash_entry *hh,
3417 Elf_Internal_Sym *sym)
3418{
3419 if (hh != NULL)
3420 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3421 {
3422 case R_METAG_GNU_VTINHERIT:
3423 case R_METAG_GNU_VTENTRY:
3424 return NULL;
3425 }
3426
3427 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3428}
3429
3430/* Update the got and plt entry reference counts for the section being
3431 removed. */
3432
3433static bfd_boolean
3434elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3435 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3436 asection *sec ATTRIBUTE_UNUSED,
3437 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3438{
3439 Elf_Internal_Shdr *symtab_hdr;
3440 struct elf_link_hash_entry **eh_syms;
3441 bfd_signed_vma *local_got_refcounts;
3442 bfd_signed_vma *local_plt_refcounts;
3443 const Elf_Internal_Rela *rel, *relend;
3444
3445 if (info->relocatable)
3446 return TRUE;
3447
3448 elf_section_data (sec)->local_dynrel = NULL;
3449
3450 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3451 eh_syms = elf_sym_hashes (abfd);
3452 local_got_refcounts = elf_local_got_refcounts (abfd);
3453 local_plt_refcounts = local_got_refcounts;
3454 if (local_plt_refcounts != NULL)
3455 local_plt_refcounts += symtab_hdr->sh_info;
3456
3457 relend = relocs + sec->reloc_count;
3458 for (rel = relocs; rel < relend; rel++)
3459 {
3460 unsigned long r_symndx;
3461 unsigned int r_type;
3462 struct elf_link_hash_entry *eh = NULL;
3463
3464 r_symndx = ELF32_R_SYM (rel->r_info);
3465 if (r_symndx >= symtab_hdr->sh_info)
3466 {
3467 struct elf_metag_link_hash_entry *hh;
3468 struct elf_metag_dyn_reloc_entry **hdh_pp;
3469 struct elf_metag_dyn_reloc_entry *hdh_p;
3470
3471 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3472 while (eh->root.type == bfd_link_hash_indirect
3473 || eh->root.type == bfd_link_hash_warning)
3474 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3475 hh = (struct elf_metag_link_hash_entry *) eh;
3476
3477 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3478 hdh_pp = &hdh_p->hdh_next)
3479 if (hdh_p->sec == sec)
3480 {
3481 /* Everything must go for SEC. */
3482 *hdh_pp = hdh_p->hdh_next;
3483 break;
3484 }
3485 }
3486
3487 r_type = ELF32_R_TYPE (rel->r_info);
3488 switch (r_type)
3489 {
3490 case R_METAG_TLS_LDM:
3491 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3492 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3493 break;
3494 case R_METAG_TLS_IE:
3495 case R_METAG_TLS_GD:
3496 case R_METAG_GETSET_GOT:
3497 if (eh != NULL)
3498 {
3499 if (eh->got.refcount > 0)
3500 eh->got.refcount -= 1;
3501 }
3502 else if (local_got_refcounts != NULL)
3503 {
3504 if (local_got_refcounts[r_symndx] > 0)
3505 local_got_refcounts[r_symndx] -= 1;
3506 }
3507 break;
3508
3509 case R_METAG_RELBRANCH_PLT:
3510 if (eh != NULL)
3511 {
3512 if (eh->plt.refcount > 0)
3513 eh->plt.refcount -= 1;
3514 }
3515 break;
3516
3517 case R_METAG_ADDR32:
3518 case R_METAG_HIADDR16:
3519 case R_METAG_LOADDR16:
3520 case R_METAG_GETSETOFF:
3521 case R_METAG_RELBRANCH:
3522 if (eh != NULL)
3523 {
3524 struct elf_metag_link_hash_entry *hh;
3525 struct elf_metag_dyn_reloc_entry **hdh_pp;
3526 struct elf_metag_dyn_reloc_entry *hdh_p;
3527
3528 if (!info->shared && eh->plt.refcount > 0)
3529 eh->plt.refcount -= 1;
3530
3531 hh = (struct elf_metag_link_hash_entry *) eh;
3532
3533 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3534 hdh_pp = &hdh_p->hdh_next)
3535 if (hdh_p->sec == sec)
3536 {
3537 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3538 hdh_p->relative_count -= 1;
3539 hdh_p->count -= 1;
3540 if (hdh_p->count == 0)
3541 *hdh_pp = hdh_p->hdh_next;
3542 break;
3543 }
3544 }
3545 break;
3546
3547 default:
3548 break;
3549 }
3550 }
3551
3552 return TRUE;
3553}
3554
3555/* Determine the type of stub needed, if any, for a call. */
3556
3557static enum elf_metag_stub_type
3558metag_type_of_stub (asection *input_sec,
3559 const Elf_Internal_Rela *rel,
3560 struct elf_metag_link_hash_entry *hh,
3561 bfd_vma destination,
3562 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3563{
3564 bfd_vma location;
3565 bfd_vma branch_offset;
3566 bfd_vma max_branch_offset;
3567
3568 if (hh != NULL &&
3569 !(hh->eh.root.type == bfd_link_hash_defined
3570 || hh->eh.root.type == bfd_link_hash_defweak))
3571 return metag_stub_none;
3572
3573 /* Determine where the call point is. */
3574 location = (input_sec->output_offset
3575 + input_sec->output_section->vma
3576 + rel->r_offset);
3577
3578 branch_offset = destination - location;
3579
3580 /* Determine if a long branch stub is needed. Meta branch offsets
3581 are signed 19 bits 4 byte aligned. */
3582 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3583
3584 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3585 {
3586 if (info->shared)
3587 return metag_stub_long_branch_shared;
3588 else
3589 return metag_stub_long_branch;
3590 }
3591
3592 return metag_stub_none;
3593}
3594
3595#define MOVT_A0_3 0x82180005
3596#define JUMP_A0_3 0xac180003
3597
3598#define MOVT_A1LBP 0x83080005
3599#define ADD_A1LBP 0x83080000
3600
3601#define ADDT_A0_3_CPC 0x82980001
3602#define ADD_A0_3_A0_3 0x82180000
3603#define MOV_PC_A0_3 0xa3180ca0
3604
3605static bfd_boolean
3606metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3607{
3608 struct elf_metag_stub_hash_entry *hsh;
3609 asection *stub_sec;
3610 bfd *stub_bfd;
3611 bfd_byte *loc;
3612 bfd_vma sym_value;
3613 int size;
3614
3615 /* Massage our args to the form they really have. */
3616 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3617
3618 stub_sec = hsh->stub_sec;
3619
3620 /* Make a note of the offset within the stubs for this entry. */
3621 hsh->stub_offset = stub_sec->size;
3622 loc = stub_sec->contents + hsh->stub_offset;
3623
3624 stub_bfd = stub_sec->owner;
3625
3626 switch (hsh->stub_type)
3627 {
3628 case metag_stub_long_branch_shared:
3629 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3630 calculate the jump target using A0.3 as a temporary. Then a MOV
3631 to PC carries out the jump. */
3632 sym_value = (hsh->target_value
3633 + hsh->target_section->output_offset
3634 + hsh->target_section->output_section->vma
3635 + hsh->addend);
3636
3637 sym_value -= (hsh->stub_offset
3638 + stub_sec->output_offset
3639 + stub_sec->output_section->vma);
3640
3641 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3642 loc);
3643
3644 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3645 loc + 4);
3646
3647 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3648
3649 size = 12;
3650 break;
3651 case metag_stub_long_branch:
3652 /* A standard long branch stub is a MOVT instruction followed by a
3653 JUMP instruction using the A0.3 register as a temporary. This is
3654 the same method used by the LDLK linker (patch.c). */
3655 sym_value = (hsh->target_value
3656 + hsh->target_section->output_offset
3657 + hsh->target_section->output_section->vma
3658 + hsh->addend);
3659
3660 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3661 loc);
3662
3663 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3664
3665 size = 8;
3666 break;
3667 default:
3668 BFD_FAIL ();
3669 return FALSE;
3670 }
3671
3672 stub_sec->size += size;
3673 return TRUE;
3674}
3675
3676/* As above, but don't actually build the stub. Just bump offset so
3677 we know stub section sizes. */
3678
3679static bfd_boolean
3680metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3681{
3682 struct elf_metag_stub_hash_entry *hsh;
3683 int size = 0;
3684
3685 /* Massage our args to the form they really have. */
3686 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3687
3688 if (hsh->stub_type == metag_stub_long_branch)
3689 size = 8;
3690 else if (hsh->stub_type == metag_stub_long_branch_shared)
3691 size = 12;
3692
3693 hsh->stub_sec->size += size;
3694 return TRUE;
3695}
3696
3697/* Set up various things so that we can make a list of input sections
3698 for each output section included in the link. Returns -1 on error,
3699 0 when no stubs will be needed, and 1 on success. */
3700
3701int
3702elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3703{
3704 bfd *input_bfd;
3705 unsigned int bfd_count;
3706 int top_id, top_index;
3707 asection *section;
3708 asection **input_list, **list;
3709 bfd_size_type amt;
3710 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3711
3712 /* Count the number of input BFDs and find the top input section id. */
3713 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3714 input_bfd != NULL;
3715 input_bfd = input_bfd->link_next)
3716 {
3717 bfd_count += 1;
3718 for (section = input_bfd->sections;
3719 section != NULL;
3720 section = section->next)
3721 {
3722 if (top_id < section->id)
3723 top_id = section->id;
3724 }
3725 }
3726
3727 htab->bfd_count = bfd_count;
3728
3729 amt = sizeof (struct map_stub) * (top_id + 1);
3730 htab->stub_group = bfd_zmalloc (amt);
3731 if (htab->stub_group == NULL)
3732 return -1;
3733
3734 /* We can't use output_bfd->section_count here to find the top output
3735 section index as some sections may have been removed, and
3736 strip_excluded_output_sections doesn't renumber the indices. */
3737 for (section = output_bfd->sections, top_index = 0;
3738 section != NULL;
3739 section = section->next)
3740 {
3741 if (top_index < section->index)
3742 top_index = section->index;
3743 }
3744
3745 htab->top_index = top_index;
3746 amt = sizeof (asection *) * (top_index + 1);
3747 input_list = bfd_malloc (amt);
3748 htab->input_list = input_list;
3749 if (input_list == NULL)
3750 return -1;
3751
3752 /* For sections we aren't interested in, mark their entries with a
3753 value we can check later. */
3754 list = input_list + top_index;
3755 do
3756 *list = bfd_abs_section_ptr;
3757 while (list-- != input_list);
3758
3759 for (section = output_bfd->sections;
3760 section != NULL;
3761 section = section->next)
3762 {
3763 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3764 * have PC relative relocs in them but no code flag set. */
3765 if (((section->flags & SEC_CODE) != 0) ||
3766 strcmp(".ctors", section->name) ||
3767 strcmp(".dtors", section->name))
3768 input_list[section->index] = NULL;
3769 }
3770
3771 return 1;
3772}
3773
3774/* The linker repeatedly calls this function for each input section,
3775 in the order that input sections are linked into output sections.
3776 Build lists of input sections to determine groupings between which
3777 we may insert linker stubs. */
3778
3779void
3780elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3781{
3782 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3783
3784 if (isec->output_section->index <= htab->top_index)
3785 {
3786 asection **list = htab->input_list + isec->output_section->index;
3787 if (*list != bfd_abs_section_ptr)
3788 {
3789 /* Steal the link_sec pointer for our list. */
3790#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3791 /* This happens to make the list in reverse order,
3792 which is what we want. */
3793 PREV_SEC (isec) = *list;
3794 *list = isec;
3795 }
3796 }
3797}
3798
3799/* See whether we can group stub sections together. Grouping stub
3800 sections may result in fewer stubs. More importantly, we need to
3801 put all .init* and .fini* stubs at the beginning of the .init or
3802 .fini output sections respectively, because glibc splits the
3803 _init and _fini functions into multiple parts. Putting a stub in
3804 the middle of a function is not a good idea. */
3805
3806static void
3807group_sections (struct elf_metag_link_hash_table *htab,
3808 bfd_size_type stub_group_size,
3809 bfd_boolean stubs_always_before_branch)
3810{
3811 asection **list = htab->input_list + htab->top_index;
3812 do
3813 {
3814 asection *tail = *list;
3815 if (tail == bfd_abs_section_ptr)
3816 continue;
3817 while (tail != NULL)
3818 {
3819 asection *curr;
3820 asection *prev;
3821 bfd_size_type total;
3822 bfd_boolean big_sec;
3823
3824 curr = tail;
3825 total = tail->size;
3826 big_sec = total >= stub_group_size;
3827
3828 while ((prev = PREV_SEC (curr)) != NULL
3829 && ((total += curr->output_offset - prev->output_offset)
3830 < stub_group_size))
3831 curr = prev;
3832
3833 /* OK, the size from the start of CURR to the end is less
3834 than stub_group_size bytes and thus can be handled by one stub
3835 section. (or the tail section is itself larger than
3836 stub_group_size bytes, in which case we may be toast.)
3837 We should really be keeping track of the total size of
3838 stubs added here, as stubs contribute to the final output
3839 section size. */
3840 do
3841 {
3842 prev = PREV_SEC (tail);
3843 /* Set up this stub group. */
3844 htab->stub_group[tail->id].link_sec = curr;
3845 }
3846 while (tail != curr && (tail = prev) != NULL);
3847
3848 /* But wait, there's more! Input sections up to stub_group_size
3849 bytes before the stub section can be handled by it too.
3850 Don't do this if we have a really large section after the
3851 stubs, as adding more stubs increases the chance that
3852 branches may not reach into the stub section. */
3853 if (!stubs_always_before_branch && !big_sec)
3854 {
3855 total = 0;
3856 while (prev != NULL
3857 && ((total += tail->output_offset - prev->output_offset)
3858 < stub_group_size))
3859 {
3860 tail = prev;
3861 prev = PREV_SEC (tail);
3862 htab->stub_group[tail->id].link_sec = curr;
3863 }
3864 }
3865 tail = prev;
3866 }
3867 }
3868 while (list-- != htab->input_list);
3869 free (htab->input_list);
3870#undef PREV_SEC
3871}
3872
3873/* Read in all local syms for all input bfds.
3874 Returns -1 on error, 0 otherwise. */
3875
3876static int
3877get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3878 struct bfd_link_info *info)
3879{
3880 unsigned int bfd_indx;
3881 Elf_Internal_Sym *local_syms, **all_local_syms;
3882 int stub_changed = 0;
3883 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3884
3885 /* We want to read in symbol extension records only once. To do this
3886 we need to read in the local symbols in parallel and save them for
3887 later use; so hold pointers to the local symbols in an array. */
3888 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3889 all_local_syms = bfd_zmalloc (amt);
3890 htab->all_local_syms = all_local_syms;
3891 if (all_local_syms == NULL)
3892 return -1;
3893
3894 /* Walk over all the input BFDs, swapping in local symbols. */
3895 for (bfd_indx = 0;
3896 input_bfd != NULL;
3897 input_bfd = input_bfd->link_next, bfd_indx++)
3898 {
3899 Elf_Internal_Shdr *symtab_hdr;
3900
3901 /* We'll need the symbol table in a second. */
3902 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3903 if (symtab_hdr->sh_info == 0)
3904 continue;
3905
3906 /* We need an array of the local symbols attached to the input bfd. */
3907 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3908 if (local_syms == NULL)
3909 {
3910 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3911 symtab_hdr->sh_info, 0,
3912 NULL, NULL, NULL);
3913 /* Cache them for elf_link_input_bfd. */
3914 symtab_hdr->contents = (unsigned char *) local_syms;
3915 }
3916 if (local_syms == NULL)
3917 return -1;
3918
3919 all_local_syms[bfd_indx] = local_syms;
3920 }
3921
3922 return stub_changed;
3923}
3924
3925/* Determine and set the size of the stub section for a final link.
3926
3927The basic idea here is to examine all the relocations looking for
3928PC-relative calls to a target that is unreachable with a "CALLR"
3929instruction. */
3930
3931/* See elf32-hppa.c and elf64-ppc.c. */
3932
3933bfd_boolean
3934elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3935 struct bfd_link_info *info,
3936 bfd_signed_vma group_size,
3937 asection * (*add_stub_section) (const char *, asection *),
3938 void (*layout_sections_again) (void))
3939{
3940 bfd_size_type stub_group_size;
3941 bfd_boolean stubs_always_before_branch;
3942 bfd_boolean stub_changed;
3943 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3944
3945 /* Stash our params away. */
3946 htab->stub_bfd = stub_bfd;
3947 htab->add_stub_section = add_stub_section;
3948 htab->layout_sections_again = layout_sections_again;
3949 stubs_always_before_branch = group_size < 0;
3950 if (group_size < 0)
3951 stub_group_size = -group_size;
3952 else
3953 stub_group_size = group_size;
3954 if (stub_group_size == 1)
3955 {
3956 /* Default values. */
3957 /* FIXME: not sure what these values should be */
3958 if (stubs_always_before_branch)
3959 {
3960 stub_group_size = (1 << BRANCH_BITS);
3961 }
3962 else
3963 {
3964 stub_group_size = (1 << BRANCH_BITS);
3965 }
3966 }
3967
3968 group_sections (htab, stub_group_size, stubs_always_before_branch);
3969
3970 switch (get_local_syms (output_bfd, info->input_bfds, info))
3971 {
3972 default:
3973 if (htab->all_local_syms)
3974 goto error_ret_free_local;
3975 return FALSE;
3976
3977 case 0:
3978 stub_changed = FALSE;
3979 break;
3980
3981 case 1:
3982 stub_changed = TRUE;
3983 break;
3984 }
3985
3986 while (1)
3987 {
3988 bfd *input_bfd;
3989 unsigned int bfd_indx;
3990 asection *stub_sec;
3991
3992 for (input_bfd = info->input_bfds, bfd_indx = 0;
3993 input_bfd != NULL;
3994 input_bfd = input_bfd->link_next, bfd_indx++)
3995 {
3996 Elf_Internal_Shdr *symtab_hdr;
3997 asection *section;
3998 Elf_Internal_Sym *local_syms;
3999
4000 /* We'll need the symbol table in a second. */
4001 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4002 if (symtab_hdr->sh_info == 0)
4003 continue;
4004
4005 local_syms = htab->all_local_syms[bfd_indx];
4006
4007 /* Walk over each section attached to the input bfd. */
4008 for (section = input_bfd->sections;
4009 section != NULL;
4010 section = section->next)
4011 {
4012 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4013
4014 /* If there aren't any relocs, then there's nothing more
4015 to do. */
4016 if ((section->flags & SEC_RELOC) == 0
4017 || section->reloc_count == 0)
4018 continue;
4019
4020 /* If this section is a link-once section that will be
4021 discarded, then don't create any stubs. */
4022 if (section->output_section == NULL
4023 || section->output_section->owner != output_bfd)
4024 continue;
4025
4026 /* Get the relocs. */
4027 internal_relocs
4028 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4029 info->keep_memory);
4030 if (internal_relocs == NULL)
4031 goto error_ret_free_local;
4032
4033 /* Now examine each relocation. */
4034 irela = internal_relocs;
4035 irelaend = irela + section->reloc_count;
4036 for (; irela < irelaend; irela++)
4037 {
4038 unsigned int r_type, r_indx;
4039 enum elf_metag_stub_type stub_type;
4040 struct elf_metag_stub_hash_entry *hsh;
4041 asection *sym_sec;
4042 bfd_vma sym_value;
4043 bfd_vma destination;
4044 struct elf_metag_link_hash_entry *hh;
4045 char *stub_name;
4046 const asection *id_sec;
4047
4048 r_type = ELF32_R_TYPE (irela->r_info);
4049 r_indx = ELF32_R_SYM (irela->r_info);
4050
4051 if (r_type >= (unsigned int) R_METAG_MAX)
4052 {
4053 bfd_set_error (bfd_error_bad_value);
4054 error_ret_free_internal:
4055 if (elf_section_data (section)->relocs == NULL)
4056 free (internal_relocs);
4057 goto error_ret_free_local;
4058 }
4059
4060 /* Only look for stubs on CALLR and B instructions. */
4061 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4062 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4063 continue;
4064
4065 /* Now determine the call target, its name, value,
4066 section. */
4067 sym_sec = NULL;
4068 sym_value = 0;
4069 destination = 0;
4070 hh = NULL;
4071 if (r_indx < symtab_hdr->sh_info)
4072 {
4073 /* It's a local symbol. */
4074 Elf_Internal_Sym *sym;
4075 Elf_Internal_Shdr *hdr;
4076 unsigned int shndx;
4077
4078 sym = local_syms + r_indx;
4079 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4080 sym_value = sym->st_value;
4081 shndx = sym->st_shndx;
4082 if (shndx < elf_numsections (input_bfd))
4083 {
4084 hdr = elf_elfsections (input_bfd)[shndx];
4085 sym_sec = hdr->bfd_section;
4086 destination = (sym_value + irela->r_addend
4087 + sym_sec->output_offset
4088 + sym_sec->output_section->vma);
4089 }
4090 }
4091 else
4092 {
4093 /* It's an external symbol. */
4094 int e_indx;
4095
4096 e_indx = r_indx - symtab_hdr->sh_info;
4097 hh = ((struct elf_metag_link_hash_entry *)
4098 elf_sym_hashes (input_bfd)[e_indx]);
4099
4100 while (hh->eh.root.type == bfd_link_hash_indirect
4101 || hh->eh.root.type == bfd_link_hash_warning)
4102 hh = ((struct elf_metag_link_hash_entry *)
4103 hh->eh.root.u.i.link);
4104
4105 if (hh->eh.root.type == bfd_link_hash_defined
4106 || hh->eh.root.type == bfd_link_hash_defweak)
4107 {
4108 sym_sec = hh->eh.root.u.def.section;
4109 sym_value = hh->eh.root.u.def.value;
4110 if (hh->eh.plt.offset != (bfd_vma) -1
4111 && hh->eh.dynindx != -1
4112 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4113 {
4114 sym_sec = htab->splt;
4115 sym_value = hh->eh.plt.offset;
4116 }
4117
4118 if (sym_sec->output_section != NULL)
4119 destination = (sym_value + irela->r_addend
4120 + sym_sec->output_offset
4121 + sym_sec->output_section->vma);
4122 else
4123 continue;
4124 }
4125 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4126 {
4127 if (! info->shared)
4128 continue;
4129 }
4130 else if (hh->eh.root.type == bfd_link_hash_undefined)
4131 {
4132 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4133 && (ELF_ST_VISIBILITY (hh->eh.other)
4134 == STV_DEFAULT)))
4135 continue;
4136 }
4137 else
4138 {
4139 bfd_set_error (bfd_error_bad_value);
4140 goto error_ret_free_internal;
4141 }
4142 }
4143
4144 /* Determine what (if any) linker stub is needed. */
4145 stub_type = metag_type_of_stub (section, irela, hh,
4146 destination, info);
4147 if (stub_type == metag_stub_none)
4148 continue;
4149
4150 /* Support for grouping stub sections. */
4151 id_sec = htab->stub_group[section->id].link_sec;
4152
4153 /* Get the name of this stub. */
4154 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4155 if (!stub_name)
4156 goto error_ret_free_internal;
4157
4158 hsh = metag_stub_hash_lookup (&htab->bstab,
4159 stub_name,
4160 FALSE, FALSE);
4161 if (hsh != NULL)
4162 {
4163 /* The proper stub has already been created. */
4164 free (stub_name);
4165 continue;
4166 }
4167
4168 hsh = metag_add_stub (stub_name, section, htab);
4169 if (hsh == NULL)
4170 {
4171 free (stub_name);
4172 goto error_ret_free_internal;
4173 }
4174 hsh->target_value = sym_value;
4175 hsh->target_section = sym_sec;
4176 hsh->stub_type = stub_type;
4177 hsh->hh = hh;
4178 hsh->addend = irela->r_addend;
4179 stub_changed = TRUE;
4180 }
4181
4182 /* We're done with the internal relocs, free them. */
4183 if (elf_section_data (section)->relocs == NULL)
4184 free (internal_relocs);
4185 }
4186 }
4187
4188 if (!stub_changed)
4189 break;
4190
4191 /* OK, we've added some stubs. Find out the new size of the
4192 stub sections. */
4193 for (stub_sec = htab->stub_bfd->sections;
4194 stub_sec != NULL;
4195 stub_sec = stub_sec->next)
4196 stub_sec->size = 0;
4197
4198 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4199
4200 /* Ask the linker to do its stuff. */
4201 (*htab->layout_sections_again) ();
4202 stub_changed = FALSE;
4203 }
4204
4205 free (htab->all_local_syms);
4206 return TRUE;
4207
4208 error_ret_free_local:
4209 free (htab->all_local_syms);
4210 return FALSE;
4211}
4212
4213/* Build all the stubs associated with the current output file. The
4214 stubs are kept in a hash table attached to the main linker hash
4215 table. This function is called via metagelf_finish in the linker. */
4216
4217bfd_boolean
4218elf_metag_build_stubs (struct bfd_link_info *info)
4219{
4220 asection *stub_sec;
4221 struct bfd_hash_table *table;
4222 struct elf_metag_link_hash_table *htab;
4223
4224 htab = metag_link_hash_table (info);
4225
4226 for (stub_sec = htab->stub_bfd->sections;
4227 stub_sec != NULL;
4228 stub_sec = stub_sec->next)
4229 {
4230 bfd_size_type size;
4231
4232 /* Allocate memory to hold the linker stubs. */
4233 size = stub_sec->size;
4234 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4235 if (stub_sec->contents == NULL && size != 0)
4236 return FALSE;
4237 stub_sec->size = 0;
4238 }
4239
4240 /* Build the stubs as directed by the stub hash table. */
4241 table = &htab->bstab;
4242 bfd_hash_traverse (table, metag_build_one_stub, info);
4243
4244 return TRUE;
4245}
4246
4247/* Return TRUE if SYM represents a local label symbol. */
4248
4249static bfd_boolean
4250elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4251{
4252 if (name[0] == '$' && name[1] == 'L')
4253 return 1;
4254 return _bfd_elf_is_local_label_name (abfd, name);
4255}
4256
4257/* Return address for Ith PLT stub in section PLT, for relocation REL
4258 or (bfd_vma) -1 if it should not be included. */
4259
4260static bfd_vma
4261elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4262 const arelent *rel ATTRIBUTE_UNUSED)
4263{
4264 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4265}
4266
4267#define ELF_ARCH bfd_arch_metag
4268#define ELF_TARGET_ID METAG_ELF_DATA
4269#define ELF_MACHINE_CODE EM_METAG
4270#define ELF_MINPAGESIZE 0x1000
4271#define ELF_MAXPAGESIZE 0x4000
4272#define ELF_COMMONPAGESIZE 0x1000
4273
4274#define TARGET_LITTLE_SYM bfd_elf32_metag_vec
4275#define TARGET_LITTLE_NAME "elf32-metag"
4276
4277#define elf_symbol_leading_char '_'
4278
4279#define elf_info_to_howto_rel NULL
4280#define elf_info_to_howto metag_info_to_howto_rela
4281
4282#define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4283#define bfd_elf32_bfd_link_hash_table_create \
4284 elf_metag_link_hash_table_create
4285#define bfd_elf32_bfd_link_hash_table_free elf_metag_link_hash_table_free
4286#define elf_backend_relocate_section elf_metag_relocate_section
4287#define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4288#define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4289#define elf_backend_check_relocs elf_metag_check_relocs
4290#define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4291#define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4292#define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4293#define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4294#define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4295#define elf_backend_omit_section_dynsym \
4296 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4297#define elf_backend_post_process_headers elf_metag_post_process_headers
4298#define elf_backend_reloc_type_class elf_metag_reloc_type_class
4299#define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4300#define elf_backend_plt_sym_val elf_metag_plt_sym_val
4301
4302#define elf_backend_can_gc_sections 1
4303#define elf_backend_can_refcount 1
4304#define elf_backend_got_header_size 12
4305#define elf_backend_rela_normal 1
4306#define elf_backend_want_got_sym 0
4307#define elf_backend_want_plt_sym 0
4308#define elf_backend_plt_readonly 1
4309
4310#define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4311#define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4312
4313#include "elf32-target.h"
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