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