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gdb: add target_ops::supports_displaced_step
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2020 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 enum
789 {
790 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
791 } tls_type;
792 };
793
794 struct elf_metag_link_hash_table
795 {
796 /* The main hash table. */
797 struct elf_link_hash_table etab;
798
799 /* The stub hash table. */
800 struct bfd_hash_table bstab;
801
802 /* Linker stub bfd. */
803 bfd *stub_bfd;
804
805 /* Linker call-backs. */
806 asection * (*add_stub_section) (const char *, asection *);
807 void (*layout_sections_again) (void);
808
809 /* Array to keep track of which stub sections have been created, and
810 information on stub grouping. */
811 struct map_stub
812 {
813 /* This is the section to which stubs in the group will be
814 attached. */
815 asection *link_sec;
816 /* The stub section. */
817 asection *stub_sec;
818 } *stub_group;
819
820 /* Assorted information used by elf_metag_size_stubs. */
821 unsigned int bfd_count;
822 unsigned int top_index;
823 asection **input_list;
824 Elf_Internal_Sym **all_local_syms;
825
826 /* Small local sym cache. */
827 struct sym_cache sym_cache;
828
829 /* Data for LDM relocations. */
830 union
831 {
832 bfd_signed_vma refcount;
833 bfd_vma offset;
834 } tls_ldm_got;
835 };
836
837 /* Return the base vma address which should be subtracted from the
838 real address when resolving a dtpoff relocation. This is PT_TLS
839 segment p_vaddr. */
840 static bfd_vma
841 dtpoff_base (struct bfd_link_info *info)
842 {
843 /* If tls_sec is NULL, we should have signalled an error already. */
844 if (elf_hash_table (info)->tls_sec == NULL)
845 return 0;
846 return elf_hash_table (info)->tls_sec->vma;
847 }
848
849 /* Return the relocation value for R_METAG_TLS_IE */
850 static bfd_vma
851 tpoff (struct bfd_link_info *info, bfd_vma address)
852 {
853 /* If tls_sec is NULL, we should have signalled an error already. */
854 if (elf_hash_table (info)->tls_sec == NULL)
855 return 0;
856 /* METAG TLS ABI is variant I and static TLS blocks start just after
857 tcbhead structure which has 2 pointer fields. */
858 return (address - elf_hash_table (info)->tls_sec->vma
859 + align_power ((bfd_vma) 8,
860 elf_hash_table (info)->tls_sec->alignment_power));
861 }
862
863 static bfd_boolean
864 metag_info_to_howto_rela (bfd *abfd,
865 arelent *cache_ptr,
866 Elf_Internal_Rela *dst)
867 {
868 unsigned int r_type;
869
870 r_type = ELF32_R_TYPE (dst->r_info);
871 if (r_type >= (unsigned int) R_METAG_MAX)
872 {
873 /* xgettext:c-format */
874 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
875 abfd, r_type);
876 bfd_set_error (bfd_error_bad_value);
877 return FALSE;
878 }
879 cache_ptr->howto = & elf_metag_howto_table [r_type];
880 return TRUE;
881 }
882
883 static reloc_howto_type *
884 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
885 bfd_reloc_code_real_type code)
886 {
887 unsigned int i;
888
889 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
890 if (metag_reloc_map [i].bfd_reloc_val == code)
891 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
892
893 return NULL;
894 }
895
896 static reloc_howto_type *
897 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
898 const char *r_name)
899 {
900 unsigned int i;
901
902 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
903 if (elf_metag_howto_table[i].name != NULL
904 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
905 return &elf_metag_howto_table[i];
906
907 return NULL;
908 }
909
910 /* Various hash macros and functions. */
911 #define metag_link_hash_table(p) \
912 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
913 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
914
915 #define metag_elf_hash_entry(ent) \
916 ((struct elf_metag_link_hash_entry *)(ent))
917
918 #define metag_stub_hash_entry(ent) \
919 ((struct elf_metag_stub_hash_entry *)(ent))
920
921 #define metag_stub_hash_lookup(table, string, create, copy) \
922 ((struct elf_metag_stub_hash_entry *) \
923 bfd_hash_lookup ((table), (string), (create), (copy)))
924
925 #define metag_elf_local_got_tls_type(abfd) \
926 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
927
928 /* Assorted hash table functions. */
929
930 /* Initialize an entry in the stub hash table. */
931
932 static struct bfd_hash_entry *
933 stub_hash_newfunc (struct bfd_hash_entry *entry,
934 struct bfd_hash_table *table,
935 const char *string)
936 {
937 /* Allocate the structure if it has not already been allocated by a
938 subclass. */
939 if (entry == NULL)
940 {
941 entry = bfd_hash_allocate (table,
942 sizeof (struct elf_metag_stub_hash_entry));
943 if (entry == NULL)
944 return entry;
945 }
946
947 /* Call the allocation method of the superclass. */
948 entry = bfd_hash_newfunc (entry, table, string);
949 if (entry != NULL)
950 {
951 struct elf_metag_stub_hash_entry *hsh;
952
953 /* Initialize the local fields. */
954 hsh = (struct elf_metag_stub_hash_entry *) entry;
955 hsh->stub_sec = NULL;
956 hsh->stub_offset = 0;
957 hsh->target_value = 0;
958 hsh->target_section = NULL;
959 hsh->stub_type = metag_stub_long_branch;
960 hsh->hh = NULL;
961 hsh->id_sec = NULL;
962 }
963
964 return entry;
965 }
966
967 /* Initialize an entry in the link hash table. */
968
969 static struct bfd_hash_entry *
970 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
971 struct bfd_hash_table *table,
972 const char *string)
973 {
974 /* Allocate the structure if it has not already been allocated by a
975 subclass. */
976 if (entry == NULL)
977 {
978 entry = bfd_hash_allocate (table,
979 sizeof (struct elf_metag_link_hash_entry));
980 if (entry == NULL)
981 return entry;
982 }
983
984 /* Call the allocation method of the superclass. */
985 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
986 if (entry != NULL)
987 {
988 struct elf_metag_link_hash_entry *hh;
989
990 /* Initialize the local fields. */
991 hh = (struct elf_metag_link_hash_entry *) entry;
992 hh->hsh_cache = NULL;
993 hh->tls_type = GOT_UNKNOWN;
994 }
995
996 return entry;
997 }
998
999 /* Free the derived linker hash table. */
1000
1001 static void
1002 elf_metag_link_hash_table_free (bfd *obfd)
1003 {
1004 struct elf_metag_link_hash_table *htab
1005 = (struct elf_metag_link_hash_table *) obfd->link.hash;
1006
1007 bfd_hash_table_free (&htab->bstab);
1008 _bfd_elf_link_hash_table_free (obfd);
1009 }
1010
1011 /* Create the derived linker hash table. The Meta ELF port uses the derived
1012 hash table to keep information specific to the Meta ELF linker (without
1013 using static variables). */
1014
1015 static struct bfd_link_hash_table *
1016 elf_metag_link_hash_table_create (bfd *abfd)
1017 {
1018 struct elf_metag_link_hash_table *htab;
1019 size_t amt = sizeof (*htab);
1020
1021 htab = bfd_zmalloc (amt);
1022 if (htab == NULL)
1023 return NULL;
1024
1025 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1026 metag_link_hash_newfunc,
1027 sizeof (struct elf_metag_link_hash_entry),
1028 METAG_ELF_DATA))
1029 {
1030 free (htab);
1031 return NULL;
1032 }
1033
1034 /* Init the stub hash table too. */
1035 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1036 sizeof (struct elf_metag_stub_hash_entry)))
1037 {
1038 _bfd_elf_link_hash_table_free (abfd);
1039 return NULL;
1040 }
1041 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
1042
1043 return &htab->etab.root;
1044 }
1045
1046 /* Section name for stubs is the associated section name plus this
1047 string. */
1048 #define STUB_SUFFIX ".stub"
1049
1050 /* Build a name for an entry in the stub hash table. */
1051
1052 static char *
1053 metag_stub_name (const asection *input_section,
1054 const asection *sym_sec,
1055 const struct elf_metag_link_hash_entry *hh,
1056 const Elf_Internal_Rela *rel)
1057 {
1058 char *stub_name;
1059 bfd_size_type len;
1060
1061 if (hh)
1062 {
1063 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1064 stub_name = bfd_malloc (len);
1065 if (stub_name != NULL)
1066 {
1067 sprintf (stub_name, "%08x_%s+%x",
1068 input_section->id & 0xffffffff,
1069 hh->eh.root.root.string,
1070 (int) rel->r_addend & 0xffffffff);
1071 }
1072 }
1073 else
1074 {
1075 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1076 stub_name = bfd_malloc (len);
1077 if (stub_name != NULL)
1078 {
1079 sprintf (stub_name, "%08x_%x:%x+%x",
1080 input_section->id & 0xffffffff,
1081 sym_sec->id & 0xffffffff,
1082 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1083 (int) rel->r_addend & 0xffffffff);
1084 }
1085 }
1086 return stub_name;
1087 }
1088
1089 /* Look up an entry in the stub hash. Stub entries are cached because
1090 creating the stub name takes a bit of time. */
1091
1092 static struct elf_metag_stub_hash_entry *
1093 metag_get_stub_entry (const asection *input_section,
1094 const asection *sym_sec,
1095 struct elf_metag_link_hash_entry *hh,
1096 const Elf_Internal_Rela *rel,
1097 struct elf_metag_link_hash_table *htab)
1098 {
1099 struct elf_metag_stub_hash_entry *hsh;
1100 const asection *id_sec;
1101
1102 /* If this input section is part of a group of sections sharing one
1103 stub section, then use the id of the first section in the group.
1104 Stub names need to include a section id, as there may well be
1105 more than one stub used to reach say, printf, and we need to
1106 distinguish between them. */
1107 id_sec = htab->stub_group[input_section->id].link_sec;
1108
1109 if (hh != NULL && hh->hsh_cache != NULL
1110 && hh->hsh_cache->hh == hh
1111 && hh->hsh_cache->id_sec == id_sec)
1112 {
1113 hsh = hh->hsh_cache;
1114 }
1115 else
1116 {
1117 char *stub_name;
1118
1119 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1120 if (stub_name == NULL)
1121 return NULL;
1122
1123 hsh = metag_stub_hash_lookup (&htab->bstab,
1124 stub_name, FALSE, FALSE);
1125
1126 if (hh != NULL)
1127 hh->hsh_cache = hsh;
1128
1129 free (stub_name);
1130 }
1131
1132 return hsh;
1133 }
1134
1135 /* Add a new stub entry to the stub hash. Not all fields of the new
1136 stub entry are initialised. */
1137
1138 static struct elf_metag_stub_hash_entry *
1139 metag_add_stub (const char *stub_name,
1140 asection *section,
1141 struct elf_metag_link_hash_table *htab)
1142 {
1143 asection *link_sec;
1144 asection *stub_sec;
1145 struct elf_metag_stub_hash_entry *hsh;
1146
1147 link_sec = htab->stub_group[section->id].link_sec;
1148 stub_sec = htab->stub_group[section->id].stub_sec;
1149 if (stub_sec == NULL)
1150 {
1151 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1152 if (stub_sec == NULL)
1153 {
1154 size_t namelen;
1155 bfd_size_type len;
1156 char *s_name;
1157
1158 namelen = strlen (link_sec->name);
1159 len = namelen + sizeof (STUB_SUFFIX);
1160 s_name = bfd_alloc (htab->stub_bfd, len);
1161 if (s_name == NULL)
1162 return NULL;
1163
1164 memcpy (s_name, link_sec->name, namelen);
1165 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1166
1167 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1168 if (stub_sec == NULL)
1169 return NULL;
1170 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1171 }
1172 htab->stub_group[section->id].stub_sec = stub_sec;
1173 }
1174
1175 /* Enter this entry into the linker stub hash table. */
1176 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1177 TRUE, FALSE);
1178 if (hsh == NULL)
1179 {
1180 /* xgettext:c-format */
1181 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
1182 section->owner, stub_name);
1183 return NULL;
1184 }
1185
1186 hsh->stub_sec = stub_sec;
1187 hsh->stub_offset = 0;
1188 hsh->id_sec = link_sec;
1189 return hsh;
1190 }
1191
1192 /* Check a signed integer value can be represented in the given number
1193 of bits. */
1194
1195 static bfd_boolean
1196 within_signed_range (int value, unsigned int bits)
1197 {
1198 int min_val = -(1 << (bits - 1));
1199 int max_val = (1 << (bits - 1)) - 1;
1200 return (value <= max_val) && (value >= min_val);
1201 }
1202
1203 /* Perform a relocation as part of a final link. */
1204
1205 static bfd_reloc_status_type
1206 metag_final_link_relocate (reloc_howto_type *howto,
1207 bfd *input_bfd,
1208 asection *input_section,
1209 bfd_byte *contents,
1210 Elf_Internal_Rela *rel,
1211 bfd_vma relocation,
1212 struct elf_metag_link_hash_entry *hh,
1213 struct elf_metag_link_hash_table *htab,
1214 asection *sym_sec)
1215 {
1216 bfd_reloc_status_type r = bfd_reloc_ok;
1217 bfd_byte *hit_data = contents + rel->r_offset;
1218 int opcode, op_shift, op_extended, l1, l2;
1219 bfd_signed_vma srel, addend = rel->r_addend;
1220 struct elf_metag_stub_hash_entry *hsh = NULL;
1221 bfd_vma location;
1222
1223 /* Find out where we are and where we're going. */
1224 location = (rel->r_offset +
1225 input_section->output_offset +
1226 input_section->output_section->vma);
1227
1228 switch (howto->type)
1229 {
1230 case R_METAG_RELBRANCH:
1231 case R_METAG_RELBRANCH_PLT:
1232 /* Make it a pc relative offset. */
1233 relocation -= location;
1234 break;
1235 case R_METAG_TLS_GD:
1236 case R_METAG_TLS_IE:
1237 relocation -= elf_gp (input_section->output_section->owner);
1238 break;
1239 default:
1240 break;
1241 }
1242
1243 switch (howto->type)
1244 {
1245 case R_METAG_RELBRANCH_PLT:
1246 case R_METAG_RELBRANCH:
1247 opcode = bfd_get_32 (input_bfd, hit_data);
1248
1249 srel = (bfd_signed_vma) relocation;
1250 srel += addend;
1251
1252 /* If the branch is out of reach, then redirect the
1253 call to the local stub for this function. */
1254 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1255 (srel < - (1 << (BRANCH_BITS + 1))))
1256 {
1257 if (sym_sec == NULL)
1258 break;
1259
1260 hsh = metag_get_stub_entry (input_section, sym_sec,
1261 hh, rel, htab);
1262 if (hsh == NULL)
1263 return bfd_reloc_undefined;
1264
1265 /* Munge up the value and addend so that we call the stub
1266 rather than the procedure directly. */
1267 srel = (hsh->stub_offset
1268 + hsh->stub_sec->output_offset
1269 + hsh->stub_sec->output_section->vma);
1270 srel -= location;
1271 }
1272
1273 srel = srel >> 2;
1274
1275 if (!within_signed_range (srel, BRANCH_BITS))
1276 {
1277 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1278 srel = 0;
1279 else
1280 return bfd_reloc_overflow;
1281 }
1282
1283 opcode &= ~(0x7ffff << 5);
1284 opcode |= ((srel & 0x7ffff) << 5);
1285
1286 bfd_put_32 (input_bfd, opcode, hit_data);
1287 break;
1288 case R_METAG_GETSETOFF:
1289 case R_METAG_GETSET_GOT:
1290 case R_METAG_GETSET_GOTOFF:
1291 opcode = bfd_get_32 (input_bfd, hit_data);
1292
1293 srel = (bfd_signed_vma) relocation;
1294 srel += addend;
1295
1296 /* Is this a standard or extended GET/SET? */
1297 if ((opcode & 0xf0000000) == 0xa0000000)
1298 {
1299 /* Extended GET/SET. */
1300 l1 = opcode & 0x2;
1301 l2 = opcode & 0x4;
1302 op_extended = 1;
1303 }
1304 else
1305 {
1306 /* Standard GET/SET. */
1307 l1 = opcode & 0x01000000;
1308 l2 = opcode & 0x04000000;
1309 op_extended = 0;
1310 }
1311
1312 /* Calculate the width of the GET/SET and how much we need to
1313 shift the result by. */
1314 if (l2)
1315 if (l1)
1316 op_shift = 3;
1317 else
1318 op_shift = 2;
1319 else
1320 if (l1)
1321 op_shift = 1;
1322 else
1323 op_shift = 0;
1324
1325 /* GET/SET offsets are scaled by the width of the transfer. */
1326 srel = srel >> op_shift;
1327
1328 /* Extended GET/SET has signed 12 bits of offset, standard has
1329 signed 6 bits. */
1330 if (op_extended)
1331 {
1332 if (!within_signed_range (srel, 12))
1333 {
1334 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1335 srel = 0;
1336 else
1337 return bfd_reloc_overflow;
1338 }
1339 opcode &= ~(0xfff << 7);
1340 opcode |= ((srel & 0xfff) << 7);
1341 }
1342 else
1343 {
1344 if (!within_signed_range (srel, 5))
1345 {
1346 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1347 srel = 0;
1348 else
1349 return bfd_reloc_overflow;
1350 }
1351 opcode &= ~(0x3f << 8);
1352 opcode |= ((srel & 0x3f) << 8);
1353 }
1354
1355 bfd_put_32 (input_bfd, opcode, hit_data);
1356 break;
1357 case R_METAG_TLS_GD:
1358 case R_METAG_TLS_LDM:
1359 opcode = bfd_get_32 (input_bfd, hit_data);
1360
1361 if ((bfd_signed_vma)relocation < 0)
1362 {
1363 /* sign extend immediate */
1364 if ((opcode & 0xf2000001) == 0x02000000)
1365 {
1366 /* ADD De.e,Dx.r,#I16 */
1367 /* set SE bit */
1368 opcode |= (1 << 1);
1369 } else
1370 return bfd_reloc_overflow;
1371 }
1372
1373 bfd_put_32 (input_bfd, opcode, hit_data);
1374
1375 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1376 contents, rel->r_offset,
1377 relocation, rel->r_addend);
1378 break;
1379 default:
1380 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1381 contents, rel->r_offset,
1382 relocation, rel->r_addend);
1383 }
1384
1385 return r;
1386 }
1387
1388 /* This is defined because R_METAG_NONE != 0...
1389 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1390 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1391 rel, relend, howto, contents) \
1392 { \
1393 _bfd_clear_contents (howto, input_bfd, input_section, \
1394 contents, rel->r_offset); \
1395 \
1396 if (bfd_link_relocatable (info) \
1397 && (input_section->flags & SEC_DEBUGGING)) \
1398 { \
1399 /* Only remove relocations in debug sections since other \
1400 sections may require relocations. */ \
1401 Elf_Internal_Shdr *rel_hdr; \
1402 \
1403 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1404 \
1405 /* Avoid empty output section. */ \
1406 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1407 { \
1408 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1409 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1410 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1411 \
1412 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1413 \
1414 input_section->reloc_count--; \
1415 relend--; \
1416 rel--; \
1417 continue; \
1418 } \
1419 } \
1420 \
1421 rel->r_info = R_METAG_NONE; \
1422 rel->r_addend = 0; \
1423 continue; \
1424 }
1425
1426 /* Relocate a META ELF section.
1427
1428 The RELOCATE_SECTION function is called by the new ELF backend linker
1429 to handle the relocations for a section.
1430
1431 The relocs are always passed as Rela structures; if the section
1432 actually uses Rel structures, the r_addend field will always be
1433 zero.
1434
1435 This function is responsible for adjusting the section contents as
1436 necessary, and (if using Rela relocs and generating a relocatable
1437 output file) adjusting the reloc addend as necessary.
1438
1439 This function does not have to worry about setting the reloc
1440 address or the reloc symbol index.
1441
1442 LOCAL_SYMS is a pointer to the swapped in local symbols.
1443
1444 LOCAL_SECTIONS is an array giving the section in the input file
1445 corresponding to the st_shndx field of each local symbol.
1446
1447 The global hash table entry for the global symbols can be found
1448 via elf_sym_hashes (input_bfd).
1449
1450 When generating relocatable output, this function must handle
1451 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1452 going to be the section symbol corresponding to the output
1453 section, which means that the addend must be adjusted
1454 accordingly. */
1455
1456 static bfd_boolean
1457 elf_metag_relocate_section (bfd *output_bfd,
1458 struct bfd_link_info *info,
1459 bfd *input_bfd,
1460 asection *input_section,
1461 bfd_byte *contents,
1462 Elf_Internal_Rela *relocs,
1463 Elf_Internal_Sym *local_syms,
1464 asection **local_sections)
1465 {
1466 bfd_vma *local_got_offsets;
1467 Elf_Internal_Shdr *symtab_hdr;
1468 struct elf_link_hash_entry **eh_syms;
1469 struct elf_metag_link_hash_table *htab;
1470 Elf_Internal_Rela *rel;
1471 Elf_Internal_Rela *relend;
1472 asection *sreloc;
1473
1474 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1475 eh_syms = elf_sym_hashes (input_bfd);
1476 relend = relocs + input_section->reloc_count;
1477
1478 htab = metag_link_hash_table (info);
1479 local_got_offsets = elf_local_got_offsets (input_bfd);
1480
1481 sreloc = NULL;
1482
1483 for (rel = relocs; rel < relend; rel ++)
1484 {
1485 reloc_howto_type *howto;
1486 unsigned long r_symndx;
1487 Elf_Internal_Sym *sym;
1488 asection *sec;
1489 struct elf_metag_link_hash_entry *hh;
1490 bfd_vma relocation;
1491 bfd_reloc_status_type r;
1492 const char *name;
1493 int r_type;
1494
1495 r_type = ELF32_R_TYPE (rel->r_info);
1496
1497 if (r_type == R_METAG_GNU_VTINHERIT
1498 || r_type == R_METAG_GNU_VTENTRY
1499 || r_type == R_METAG_NONE)
1500 continue;
1501
1502 r_symndx = ELF32_R_SYM (rel->r_info);
1503
1504 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1505 hh = NULL;
1506 sym = NULL;
1507 sec = NULL;
1508
1509 if (r_symndx < symtab_hdr->sh_info)
1510 {
1511 sym = local_syms + r_symndx;
1512 sec = local_sections [r_symndx];
1513 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1514
1515 name = bfd_elf_string_from_elf_section
1516 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1517 name = name == NULL ? bfd_section_name (sec) : name;
1518 }
1519 else
1520 {
1521 struct elf_link_hash_entry *eh;
1522 bfd_boolean unresolved_reloc, warned, ignored;
1523
1524 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1525 r_symndx, symtab_hdr, eh_syms,
1526 eh, sec, relocation,
1527 unresolved_reloc, warned, ignored);
1528
1529 name = eh->root.root.string;
1530 hh = (struct elf_metag_link_hash_entry *) eh;
1531 }
1532
1533 if (sec != NULL && discarded_section (sec))
1534 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1535 rel, relend, howto, contents);
1536
1537 if (bfd_link_relocatable (info))
1538 continue;
1539
1540 switch (r_type)
1541 {
1542 case R_METAG_ADDR32:
1543 case R_METAG_RELBRANCH:
1544 if ((input_section->flags & SEC_ALLOC) == 0)
1545 break;
1546
1547 if ((bfd_link_pic (info)
1548 && r_symndx != STN_UNDEF
1549 && (input_section->flags & SEC_ALLOC) != 0
1550 && (r_type != R_METAG_RELBRANCH
1551 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1552 || (!bfd_link_pic (info)
1553 && hh != NULL
1554 && hh->eh.dynindx != -1
1555 && !hh->eh.non_got_ref
1556 && ((hh->eh.def_dynamic
1557 && !hh->eh.def_regular)
1558 || hh->eh.root.type == bfd_link_hash_undefweak
1559 || hh->eh.root.type == bfd_link_hash_undefined)))
1560 {
1561 Elf_Internal_Rela outrel;
1562 bfd_boolean skip, relocate;
1563 bfd_byte *loc;
1564
1565 /* When generating a shared object, these relocations
1566 are copied into the output file to be resolved at run
1567 time. */
1568
1569 sreloc = elf_section_data (input_section)->sreloc;
1570 BFD_ASSERT (sreloc != NULL);
1571
1572 skip = FALSE;
1573 relocate = FALSE;
1574
1575 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1576 info,
1577 input_section,
1578 rel->r_offset);
1579 if (outrel.r_offset == (bfd_vma) -1)
1580 skip = TRUE;
1581 else if (outrel.r_offset == (bfd_vma) -2)
1582 skip = TRUE, relocate = TRUE;
1583 outrel.r_offset += (input_section->output_section->vma
1584 + input_section->output_offset);
1585
1586 if (skip)
1587 {
1588 memset (&outrel, 0, sizeof outrel);
1589 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1590 }
1591 else if (r_type == R_METAG_RELBRANCH)
1592 {
1593 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1594 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1595 outrel.r_addend = rel->r_addend;
1596 }
1597 else
1598 {
1599 /* h->dynindx may be -1 if this symbol was marked to
1600 become local. */
1601 if (hh == NULL
1602 || ((info->symbolic || hh->eh.dynindx == -1)
1603 && hh->eh.def_regular))
1604 {
1605 relocate = TRUE;
1606 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1607 outrel.r_addend = relocation + rel->r_addend;
1608 }
1609 else
1610 {
1611 BFD_ASSERT (hh->eh.dynindx != -1);
1612 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1613 outrel.r_addend = rel->r_addend;
1614 }
1615 }
1616
1617 loc = sreloc->contents;
1618 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1619 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1620 ++sreloc->reloc_count;
1621
1622 /* If this reloc is against an external symbol, we do
1623 not want to fiddle with the addend. Otherwise, we
1624 need to include the symbol value so that it becomes
1625 an addend for the dynamic reloc. */
1626 if (! relocate)
1627 continue;
1628 }
1629 break;
1630
1631 case R_METAG_RELBRANCH_PLT:
1632 /* Relocation is to the entry for this symbol in the
1633 procedure linkage table. */
1634
1635 if (hh == NULL)
1636 break;
1637
1638 if (hh->eh.forced_local)
1639 break;
1640
1641 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
1642 {
1643 /* We didn't make a PLT entry for this symbol. This
1644 happens when statically linking PIC code, or when
1645 using -Bsymbolic. */
1646 break;
1647 }
1648
1649 relocation = (htab->etab.splt->output_section->vma
1650 + htab->etab.splt->output_offset
1651 + hh->eh.plt.offset);
1652 break;
1653 case R_METAG_HI16_GOTPC:
1654 case R_METAG_LO16_GOTPC:
1655 BFD_ASSERT (htab->etab.sgot != NULL);
1656
1657 relocation = (htab->etab.sgot->output_section->vma +
1658 htab->etab.sgot->output_offset);
1659 relocation += GOT_REG_OFFSET;
1660 relocation -= (input_section->output_section->vma
1661 + input_section->output_offset
1662 + rel->r_offset);
1663 break;
1664 case R_METAG_HI16_GOTOFF:
1665 case R_METAG_LO16_GOTOFF:
1666 case R_METAG_GETSET_GOTOFF:
1667 BFD_ASSERT (htab->etab.sgot != NULL);
1668
1669 relocation -= (htab->etab.sgot->output_section->vma +
1670 htab->etab.sgot->output_offset);
1671 relocation -= GOT_REG_OFFSET;
1672 break;
1673 case R_METAG_GETSET_GOT:
1674 {
1675 bfd_vma off;
1676 bfd_boolean do_got = 0;
1677
1678 /* Relocation is to the entry for this symbol in the
1679 global offset table. */
1680 if (hh != NULL)
1681 {
1682 bfd_boolean dyn;
1683
1684 off = hh->eh.got.offset;
1685 dyn = htab->etab.dynamic_sections_created;
1686 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1687 bfd_link_pic (info),
1688 &hh->eh))
1689 {
1690 /* If we aren't going to call finish_dynamic_symbol,
1691 then we need to handle initialisation of the .got
1692 entry and create needed relocs here. Since the
1693 offset must always be a multiple of 4, we use the
1694 least significant bit to record whether we have
1695 initialised it already. */
1696 if ((off & 1) != 0)
1697 off &= ~1;
1698 else
1699 {
1700 hh->eh.got.offset |= 1;
1701 do_got = 1;
1702 }
1703 }
1704 }
1705 else
1706 {
1707 /* Local symbol case. */
1708 if (local_got_offsets == NULL)
1709 abort ();
1710
1711 off = local_got_offsets[r_symndx];
1712
1713 /* The offset must always be a multiple of 4. We use
1714 the least significant bit to record whether we have
1715 already generated the necessary reloc. */
1716 if ((off & 1) != 0)
1717 off &= ~1;
1718 else
1719 {
1720 local_got_offsets[r_symndx] |= 1;
1721 do_got = 1;
1722 }
1723 }
1724
1725 if (do_got)
1726 {
1727 if (bfd_link_pic (info))
1728 {
1729 /* Output a dynamic relocation for this GOT entry.
1730 In this case it is relative to the base of the
1731 object because the symbol index is zero. */
1732 Elf_Internal_Rela outrel;
1733 bfd_byte *loc;
1734 asection *s = htab->etab.srelgot;
1735
1736 outrel.r_offset = (off
1737 + htab->etab.sgot->output_offset
1738 + htab->etab.sgot->output_section->vma);
1739 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1740 outrel.r_addend = relocation;
1741 loc = s->contents;
1742 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1743 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1744 }
1745 else
1746 bfd_put_32 (output_bfd, relocation,
1747 htab->etab.sgot->contents + off);
1748 }
1749
1750 if (off >= (bfd_vma) -2)
1751 abort ();
1752
1753 relocation = off - GOT_REG_OFFSET;
1754 }
1755 break;
1756 case R_METAG_TLS_GD:
1757 case R_METAG_TLS_IE:
1758 {
1759 /* XXXMJF There is room here for optimisations. For example
1760 converting from GD->IE, etc. */
1761 bfd_vma off;
1762 int indx;
1763 char tls_type;
1764
1765 if (htab->etab.sgot == NULL)
1766 abort();
1767
1768 indx = 0;
1769 if (hh != NULL)
1770 {
1771 bfd_boolean dyn;
1772 dyn = htab->etab.dynamic_sections_created;
1773
1774 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1775 bfd_link_pic (info),
1776 &hh->eh)
1777 && (!bfd_link_pic (info)
1778 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1779 {
1780 indx = hh->eh.dynindx;
1781 }
1782 off = hh->eh.got.offset;
1783 tls_type = hh->tls_type;
1784 }
1785 else
1786 {
1787 /* Local symbol case. */
1788 if (local_got_offsets == NULL)
1789 abort ();
1790
1791 off = local_got_offsets[r_symndx];
1792 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1793 }
1794
1795 if (tls_type == GOT_UNKNOWN)
1796 abort ();
1797
1798 if ((off & 1) != 0)
1799 off &= ~1;
1800 else
1801 {
1802 bfd_boolean need_relocs = FALSE;
1803 Elf_Internal_Rela outrel;
1804 bfd_byte *loc = NULL;
1805 int cur_off = off;
1806
1807 /* The GOT entries have not been initialized yet. Do it
1808 now, and emit any relocations. If both an IE GOT and a
1809 GD GOT are necessary, we emit the GD first. */
1810
1811 if ((bfd_link_pic (info) || indx != 0)
1812 && (hh == NULL
1813 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1814 || hh->eh.root.type != bfd_link_hash_undefweak))
1815 {
1816 need_relocs = TRUE;
1817 loc = htab->etab.srelgot->contents;
1818 /* FIXME (CAO): Should this be reloc_count++ ? */
1819 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
1820 }
1821
1822 if (tls_type & GOT_TLS_GD)
1823 {
1824 if (need_relocs)
1825 {
1826 outrel.r_offset = (cur_off
1827 + htab->etab.sgot->output_section->vma
1828 + htab->etab.sgot->output_offset);
1829 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1830 outrel.r_addend = 0;
1831 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
1832
1833 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1834 htab->etab.srelgot->reloc_count++;
1835 loc += sizeof (Elf32_External_Rela);
1836
1837 if (indx == 0)
1838 bfd_put_32 (output_bfd, 0,
1839 htab->etab.sgot->contents + cur_off + 4);
1840 else
1841 {
1842 bfd_put_32 (output_bfd, 0,
1843 htab->etab.sgot->contents + cur_off + 4);
1844 outrel.r_info = ELF32_R_INFO (indx,
1845 R_METAG_TLS_DTPOFF);
1846 outrel.r_offset += 4;
1847 bfd_elf32_swap_reloca_out (output_bfd,
1848 &outrel, loc);
1849 htab->etab.srelgot->reloc_count++;
1850 loc += sizeof (Elf32_External_Rela);
1851 }
1852 }
1853 else
1854 {
1855 /* We don't support changing the TLS model. */
1856 /* PR 20675 */
1857 if (bfd_link_pic (info))
1858 _bfd_error_handler (_("%pB(%pA): multiple TLS models are not supported"),
1859 input_bfd, input_section);
1860 else
1861 _bfd_error_handler (_("%pB(%pA): shared library symbol %s encountered whilst performing a static link"),
1862 input_bfd, input_section, name);
1863 return FALSE;
1864 }
1865
1866 cur_off += 8;
1867 }
1868
1869 if (tls_type & GOT_TLS_IE)
1870 {
1871 if (need_relocs)
1872 {
1873 outrel.r_offset = (cur_off
1874 + htab->etab.sgot->output_section->vma
1875 + htab->etab.sgot->output_offset);
1876 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1877
1878 if (indx == 0)
1879 outrel.r_addend = relocation - dtpoff_base (info);
1880 else
1881 outrel.r_addend = 0;
1882
1883 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1884 htab->etab.srelgot->reloc_count++;
1885 loc += sizeof (Elf32_External_Rela);
1886 }
1887 else
1888 bfd_put_32 (output_bfd, tpoff (info, relocation),
1889 htab->etab.sgot->contents + cur_off);
1890
1891 cur_off += 4;
1892 }
1893
1894 if (hh != NULL)
1895 hh->eh.got.offset |= 1;
1896 else
1897 local_got_offsets[r_symndx] |= 1;
1898 }
1899
1900 /* Add the base of the GOT to the relocation value. */
1901 relocation = off - GOT_REG_OFFSET;
1902
1903 break;
1904 }
1905
1906 case R_METAG_TLS_IENONPIC_HI16:
1907 case R_METAG_TLS_IENONPIC_LO16:
1908 case R_METAG_TLS_LE_HI16:
1909 case R_METAG_TLS_LE_LO16:
1910 if (bfd_link_pic (info))
1911 {
1912 _bfd_error_handler
1913 /* xgettext:c-format */
1914 (_("%pB(%pA+%#" PRIx64 "): "
1915 "%s relocation not permitted in shared object"),
1916 input_bfd, input_section, (uint64_t) rel->r_offset,
1917 howto->name);
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 = &hh->eh.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 if (!bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2373 return FALSE;
2374 break;
2375 }
2376 }
2377
2378 return TRUE;
2379 }
2380
2381 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2382
2383 static void
2384 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2385 struct elf_link_hash_entry *eh_dir,
2386 struct elf_link_hash_entry *eh_ind)
2387 {
2388 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2389
2390 hh_dir = metag_elf_hash_entry (eh_dir);
2391 hh_ind = metag_elf_hash_entry (eh_ind);
2392
2393 if (eh_ind->root.type == bfd_link_hash_indirect
2394 && eh_dir->got.refcount <= 0)
2395 {
2396 hh_dir->tls_type = hh_ind->tls_type;
2397 hh_ind->tls_type = GOT_UNKNOWN;
2398 }
2399
2400 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2401 }
2402
2403 /* Adjust a symbol defined by a dynamic object and referenced by a
2404 regular object. The current definition is in some section of the
2405 dynamic object, but we're not including those sections. We have to
2406 change the definition to something the rest of the link can
2407 understand. */
2408
2409 static bfd_boolean
2410 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2411 struct elf_link_hash_entry *eh)
2412 {
2413 struct elf_metag_link_hash_table *htab;
2414 asection *s, *srel;
2415
2416 /* If this is a function, put it in the procedure linkage table. We
2417 will fill in the contents of the procedure linkage table later,
2418 when we know the address of the .got section. */
2419 if (eh->type == STT_FUNC
2420 || eh->needs_plt)
2421 {
2422 if (eh->plt.refcount <= 0
2423 || SYMBOL_CALLS_LOCAL (info, eh)
2424 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2425 && eh->root.type == bfd_link_hash_undefweak))
2426 {
2427 /* This case can occur if we saw a PLT reloc in an input
2428 file, but the symbol was never referred to by a dynamic
2429 object. In such a case, we don't actually need to build
2430 a procedure linkage table, and we can just do a PCREL
2431 reloc instead. */
2432 eh->plt.offset = (bfd_vma) -1;
2433 eh->needs_plt = 0;
2434 }
2435
2436 return TRUE;
2437 }
2438 else
2439 eh->plt.offset = (bfd_vma) -1;
2440
2441 /* If this is a weak symbol, and there is a real definition, the
2442 processor independent code will have arranged for us to see the
2443 real definition first, and we can just use the same value. */
2444 if (eh->is_weakalias)
2445 {
2446 struct elf_link_hash_entry *def = weakdef (eh);
2447 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2448 eh->root.u.def.section = def->root.u.def.section;
2449 eh->root.u.def.value = def->root.u.def.value;
2450 eh->non_got_ref = def->non_got_ref;
2451 return TRUE;
2452 }
2453
2454 /* This is a reference to a symbol defined by a dynamic object which
2455 is not a function. */
2456
2457 /* If we are creating a shared library, we must presume that the
2458 only references to the symbol are via the global offset table.
2459 For such cases we need not do anything here; the relocations will
2460 be handled correctly by relocate_section. */
2461 if (bfd_link_pic (info))
2462 return TRUE;
2463
2464 /* If there are no references to this symbol that do not use the
2465 GOT, we don't need to generate a copy reloc. */
2466 if (!eh->non_got_ref)
2467 return TRUE;
2468
2469 /* If -z nocopyreloc was given, we won't generate them either. */
2470 if (info->nocopyreloc)
2471 {
2472 eh->non_got_ref = 0;
2473 return TRUE;
2474 }
2475
2476 /* If we don't find any dynamic relocs in read-only sections, then
2477 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2478 if (!_bfd_elf_readonly_dynrelocs (eh))
2479 {
2480 eh->non_got_ref = 0;
2481 return TRUE;
2482 }
2483
2484 /* We must allocate the symbol in our .dynbss section, which will
2485 become part of the .bss section of the executable. There will be
2486 an entry for this symbol in the .dynsym section. The dynamic
2487 object will contain position independent code, so all references
2488 from the dynamic object to this symbol will go through the global
2489 offset table. The dynamic linker will use the .dynsym entry to
2490 determine the address it must put in the global offset table, so
2491 both the dynamic object and the regular object will refer to the
2492 same memory location for the variable. */
2493
2494 htab = metag_link_hash_table (info);
2495
2496 /* We must generate a COPY reloc to tell the dynamic linker to
2497 copy the initial value out of the dynamic object and into the
2498 runtime process image. */
2499 if ((eh->root.u.def.section->flags & SEC_READONLY) != 0)
2500 {
2501 s = htab->etab.sdynrelro;
2502 srel = htab->etab.sreldynrelro;
2503 }
2504 else
2505 {
2506 s = htab->etab.sdynbss;
2507 srel = htab->etab.srelbss;
2508 }
2509 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2510 {
2511 srel->size += sizeof (Elf32_External_Rela);
2512 eh->needs_copy = 1;
2513 }
2514
2515 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
2516 }
2517
2518 /* Allocate space in .plt, .got and associated reloc sections for
2519 global syms. */
2520
2521 static bfd_boolean
2522 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2523 {
2524 struct bfd_link_info *info;
2525 struct elf_metag_link_hash_table *htab;
2526 struct elf_dyn_relocs *hdh_p;
2527
2528 if (eh->root.type == bfd_link_hash_indirect)
2529 return TRUE;
2530
2531 if (eh->root.type == bfd_link_hash_warning)
2532 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2533
2534 info = inf;
2535 htab = metag_link_hash_table (info);
2536
2537 if (htab->etab.dynamic_sections_created
2538 && eh->plt.refcount > 0)
2539 {
2540 /* Make sure this symbol is output as a dynamic symbol.
2541 Undefined weak syms won't yet be marked as dynamic. */
2542 if (eh->dynindx == -1
2543 && !eh->forced_local)
2544 {
2545 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2546 return FALSE;
2547 }
2548
2549 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
2550 {
2551 asection *s = htab->etab.splt;
2552
2553 /* If this is the first .plt entry, make room for the special
2554 first entry. */
2555 if (s->size == 0)
2556 s->size += PLT_ENTRY_SIZE;
2557
2558 eh->plt.offset = s->size;
2559
2560 /* If this symbol is not defined in a regular file, and we are
2561 not generating a shared library, then set the symbol to this
2562 location in the .plt. This is required to make function
2563 pointers compare as equal between the normal executable and
2564 the shared library. */
2565 if (! bfd_link_pic (info)
2566 && !eh->def_regular)
2567 {
2568 eh->root.u.def.section = s;
2569 eh->root.u.def.value = eh->plt.offset;
2570 }
2571
2572 /* Make room for this entry. */
2573 s->size += PLT_ENTRY_SIZE;
2574
2575 /* We also need to make an entry in the .got.plt section, which
2576 will be placed in the .got section by the linker script. */
2577 htab->etab.sgotplt->size += 4;
2578
2579 /* We also need to make an entry in the .rel.plt section. */
2580 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
2581 }
2582 else
2583 {
2584 eh->plt.offset = (bfd_vma) -1;
2585 eh->needs_plt = 0;
2586 }
2587 }
2588 else
2589 {
2590 eh->plt.offset = (bfd_vma) -1;
2591 eh->needs_plt = 0;
2592 }
2593
2594 if (eh->got.refcount > 0)
2595 {
2596 asection *s;
2597 bfd_boolean dyn;
2598 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2599
2600 /* Make sure this symbol is output as a dynamic symbol.
2601 Undefined weak syms won't yet be marked as dynamic. */
2602 if (eh->dynindx == -1
2603 && !eh->forced_local)
2604 {
2605 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2606 return FALSE;
2607 }
2608
2609 s = htab->etab.sgot;
2610
2611 eh->got.offset = s->size;
2612 s->size += 4;
2613 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2614 if (tls_type == GOT_TLS_GD)
2615 s->size += 4;
2616 dyn = htab->etab.dynamic_sections_created;
2617 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2618 R_METAG_TLS_GD needs one if local symbol and two if global. */
2619 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2620 || (tls_type == GOT_TLS_IE && dyn))
2621 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2622 else if (tls_type == GOT_TLS_GD)
2623 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
2624 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2625 bfd_link_pic (info),
2626 eh))
2627 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2628 }
2629 else
2630 eh->got.offset = (bfd_vma) -1;
2631
2632 if (eh->dyn_relocs == NULL)
2633 return TRUE;
2634
2635 /* If this is a -Bsymbolic shared link, then we need to discard all
2636 space allocated for dynamic pc-relative relocs against symbols
2637 defined in a regular object. For the normal shared case, discard
2638 space for relocs that have become local due to symbol visibility
2639 changes. */
2640 if (bfd_link_pic (info))
2641 {
2642 if (SYMBOL_CALLS_LOCAL (info, eh))
2643 {
2644 struct elf_dyn_relocs **hdh_pp;
2645
2646 for (hdh_pp = &eh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2647 {
2648 hdh_p->count -= hdh_p->pc_count;
2649 hdh_p->pc_count = 0;
2650 if (hdh_p->count == 0)
2651 *hdh_pp = hdh_p->next;
2652 else
2653 hdh_pp = &hdh_p->next;
2654 }
2655 }
2656
2657 /* Also discard relocs on undefined weak syms with non-default
2658 visibility. */
2659 if (eh->dyn_relocs != NULL
2660 && eh->root.type == bfd_link_hash_undefweak)
2661 {
2662 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2663 eh->dyn_relocs = NULL;
2664
2665 /* Make sure undefined weak symbols are output as a dynamic
2666 symbol in PIEs. */
2667 else if (eh->dynindx == -1
2668 && !eh->forced_local)
2669 {
2670 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2671 return FALSE;
2672 }
2673 }
2674 }
2675 else
2676 {
2677 /* For the non-shared case, discard space for relocs against
2678 symbols which turn out to need copy relocs or are not
2679 dynamic. */
2680 if (!eh->non_got_ref
2681 && ((eh->def_dynamic
2682 && !eh->def_regular)
2683 || (htab->etab.dynamic_sections_created
2684 && (eh->root.type == bfd_link_hash_undefweak
2685 || eh->root.type == bfd_link_hash_undefined))))
2686 {
2687 /* Make sure this symbol is output as a dynamic symbol.
2688 Undefined weak syms won't yet be marked as dynamic. */
2689 if (eh->dynindx == -1
2690 && !eh->forced_local)
2691 {
2692 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2693 return FALSE;
2694 }
2695
2696 /* If that succeeded, we know we'll be keeping all the
2697 relocs. */
2698 if (eh->dynindx != -1)
2699 goto keep;
2700 }
2701
2702 eh->dyn_relocs = NULL;
2703 return TRUE;
2704
2705 keep: ;
2706 }
2707
2708 /* Finally, allocate space. */
2709 for (hdh_p = eh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->next)
2710 {
2711 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2712 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2713 }
2714
2715 return TRUE;
2716 }
2717
2718 /* Set the sizes of the dynamic sections. */
2719
2720 static bfd_boolean
2721 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2722 struct bfd_link_info *info)
2723 {
2724 struct elf_metag_link_hash_table *htab;
2725 bfd *dynobj;
2726 bfd *ibfd;
2727 asection *s;
2728 bfd_boolean relocs;
2729
2730 htab = metag_link_hash_table (info);
2731 dynobj = htab->etab.dynobj;
2732 if (dynobj == NULL)
2733 abort ();
2734
2735 if (htab->etab.dynamic_sections_created)
2736 {
2737 /* Set the contents of the .interp section to the interpreter. */
2738 if (bfd_link_executable (info) && !info->nointerp)
2739 {
2740 s = bfd_get_linker_section (dynobj, ".interp");
2741 if (s == NULL)
2742 abort ();
2743 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2744 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2745 }
2746 }
2747
2748 /* Set up .got offsets for local syms, and space for local dynamic
2749 relocs. */
2750 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2751 {
2752 bfd_signed_vma *local_got;
2753 bfd_signed_vma *end_local_got;
2754 bfd_size_type locsymcount;
2755 Elf_Internal_Shdr *symtab_hdr;
2756 asection *srel;
2757 char *local_tls_type;
2758
2759 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2760 continue;
2761
2762 for (s = ibfd->sections; s != NULL; s = s->next)
2763 {
2764 struct elf_dyn_relocs *hdh_p;
2765
2766 for (hdh_p = ((struct elf_dyn_relocs *)
2767 elf_section_data (s)->local_dynrel);
2768 hdh_p != NULL;
2769 hdh_p = hdh_p->next)
2770 {
2771 if (!bfd_is_abs_section (hdh_p->sec)
2772 && bfd_is_abs_section (hdh_p->sec->output_section))
2773 {
2774 /* Input section has been discarded, either because
2775 it is a copy of a linkonce section or due to
2776 linker script /DISCARD/, so we'll be discarding
2777 the relocs too. */
2778 }
2779 else if (hdh_p->count != 0)
2780 {
2781 srel = elf_section_data (hdh_p->sec)->sreloc;
2782 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2783 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2784 info->flags |= DF_TEXTREL;
2785 }
2786 }
2787 }
2788
2789 local_got = elf_local_got_refcounts (ibfd);
2790 if (!local_got)
2791 continue;
2792
2793 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2794 locsymcount = symtab_hdr->sh_info;
2795 end_local_got = local_got + locsymcount;
2796 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2797 s = htab->etab.sgot;
2798 srel = htab->etab.srelgot;
2799 for (; local_got < end_local_got; ++local_got)
2800 {
2801 if (*local_got > 0)
2802 {
2803 *local_got = s->size;
2804 s->size += GOT_ENTRY_SIZE;
2805 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2806 if (*local_tls_type == GOT_TLS_GD)
2807 s->size += 4;
2808 if (bfd_link_pic (info))
2809 srel->size += sizeof (Elf32_External_Rela);
2810 }
2811 else
2812 *local_got = (bfd_vma) -1;
2813 ++local_tls_type;
2814 }
2815 }
2816
2817 if (htab->tls_ldm_got.refcount > 0)
2818 {
2819 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2820 reloc. */
2821 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2822 htab->etab.sgot->size += 8;
2823 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2824 }
2825 else
2826 htab->tls_ldm_got.offset = -1;
2827
2828 /* Allocate global sym .plt and .got entries, and space for global
2829 sym dynamic relocs. */
2830 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2831
2832 /* We now have determined the sizes of the various dynamic sections.
2833 Allocate memory for them. */
2834 relocs = FALSE;
2835 for (s = dynobj->sections; s != NULL; s = s->next)
2836 {
2837 bfd_boolean reloc_section = FALSE;
2838
2839 if ((s->flags & SEC_LINKER_CREATED) == 0)
2840 continue;
2841
2842 if (s == htab->etab.splt
2843 || s == htab->etab.sgot
2844 || s == htab->etab.sgotplt
2845 || s == htab->etab.sdynbss
2846 || s == htab->etab.sdynrelro)
2847 {
2848 /* Strip this section if we don't need it; see the
2849 comment below. */
2850 }
2851 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
2852 {
2853 if (s->size != 0 && s != htab->etab.srelplt)
2854 relocs = TRUE;
2855
2856 /* We use the reloc_count field as a counter if we need
2857 to copy relocs into the output file. */
2858 s->reloc_count = 0;
2859 reloc_section = TRUE;
2860 }
2861 else
2862 {
2863 /* It's not one of our sections, so don't allocate space. */
2864 continue;
2865 }
2866
2867 if (s->size == 0)
2868 {
2869 /* If we don't need this section, strip it from the
2870 output file. This is mostly to handle .rela.bss and
2871 .rela.plt. We must create both sections in
2872 create_dynamic_sections, because they must be created
2873 before the linker maps input sections to output
2874 sections. The linker does that before
2875 adjust_dynamic_symbol is called, and it is that
2876 function which decides whether anything needs to go
2877 into these sections. */
2878 s->flags |= SEC_EXCLUDE;
2879 continue;
2880 }
2881
2882 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2883 continue;
2884
2885 /* Allocate memory for the section contents. */
2886 s->contents = bfd_zalloc (dynobj, s->size);
2887 if (s->contents == NULL)
2888 return FALSE;
2889 else if (reloc_section)
2890 {
2891 unsigned char *contents = s->contents;
2892 Elf32_External_Rela reloc;
2893
2894 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2895 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2896 reloc.r_info[0] = R_METAG_NONE;
2897 for (; contents < (s->contents + s->size);
2898 contents += sizeof(Elf32_External_Rela))
2899 {
2900 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
2901 }
2902 }
2903 }
2904
2905 if (htab->etab.dynamic_sections_created)
2906 {
2907 /* Add some entries to the .dynamic section. We fill in the
2908 values later, in elf_metag_finish_dynamic_sections, but we
2909 must add the entries now so that we get the correct size for
2910 the .dynamic section. The DT_DEBUG entry is filled in by the
2911 dynamic linker and used by the debugger. */
2912 #define add_dynamic_entry(TAG, VAL) \
2913 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2914
2915 if (!add_dynamic_entry (DT_PLTGOT, 0))
2916 return FALSE;
2917
2918 if (bfd_link_executable (info))
2919 {
2920 if (!add_dynamic_entry (DT_DEBUG, 0))
2921 return FALSE;
2922 }
2923
2924 if (htab->etab.srelplt->size != 0)
2925 {
2926 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2927 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2928 || !add_dynamic_entry (DT_JMPREL, 0))
2929 return FALSE;
2930 }
2931
2932 if (relocs)
2933 {
2934 if (!add_dynamic_entry (DT_RELA, 0)
2935 || !add_dynamic_entry (DT_RELASZ, 0)
2936 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2937 return FALSE;
2938
2939 /* If any dynamic relocs apply to a read-only section,
2940 then we need a DT_TEXTREL entry. */
2941 if ((info->flags & DF_TEXTREL) == 0)
2942 elf_link_hash_traverse (&htab->etab,
2943 _bfd_elf_maybe_set_textrel, info);
2944
2945 if ((info->flags & DF_TEXTREL) != 0)
2946 {
2947 if (!add_dynamic_entry (DT_TEXTREL, 0))
2948 return FALSE;
2949 }
2950 }
2951 }
2952 #undef add_dynamic_entry
2953
2954 return TRUE;
2955 }
2956
2957 /* Finish up dynamic symbol handling. We set the contents of various
2958 dynamic sections here. */
2959
2960 static bfd_boolean
2961 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
2962 struct bfd_link_info *info,
2963 struct elf_link_hash_entry *eh,
2964 Elf_Internal_Sym *sym)
2965 {
2966 struct elf_metag_link_hash_table *htab;
2967 Elf_Internal_Rela rel;
2968 bfd_byte *loc;
2969
2970 htab = metag_link_hash_table (info);
2971
2972 if (eh->plt.offset != (bfd_vma) -1)
2973 {
2974 asection *splt;
2975 asection *sgot;
2976 asection *srela;
2977
2978 bfd_vma plt_index;
2979 bfd_vma got_offset;
2980 bfd_vma got_entry;
2981
2982 if (eh->plt.offset & 1)
2983 abort ();
2984
2985 BFD_ASSERT (eh->dynindx != -1);
2986
2987 splt = htab->etab.splt;
2988 sgot = htab->etab.sgotplt;
2989 srela = htab->etab.srelplt;
2990 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
2991
2992 /* Get the index in the procedure linkage table which
2993 corresponds to this symbol. This is the index of this symbol
2994 in all the symbols for which we are making plt entries. The
2995 first entry in the procedure linkage table is reserved. */
2996 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
2997
2998 /* Get the offset into the .got.plt table of the entry that
2999 corresponds to this function. */
3000 got_offset = plt_index * GOT_ENTRY_SIZE;
3001
3002 BFD_ASSERT (got_offset < (1 << 16));
3003
3004 got_entry = sgot->output_section->vma
3005 + sgot->output_offset
3006 + got_offset;
3007
3008 BFD_ASSERT (plt_index < (1 << 16));
3009
3010 /* Fill in the entry in the procedure linkage table. */
3011 if (! bfd_link_pic (info))
3012 {
3013 bfd_put_32 (output_bfd,
3014 (plt_entry[0]
3015 | (((got_entry >> 16) & 0xffff) << 3)),
3016 splt->contents + eh->plt.offset);
3017 bfd_put_32 (output_bfd,
3018 (plt_entry[1]
3019 | ((got_entry & 0xffff) << 3)),
3020 splt->contents + eh->plt.offset + 4);
3021 bfd_put_32 (output_bfd, plt_entry[2],
3022 splt->contents + eh->plt.offset + 8);
3023 bfd_put_32 (output_bfd,
3024 (plt_entry[3] | (plt_index << 3)),
3025 splt->contents + eh->plt.offset + 12);
3026 bfd_put_32 (output_bfd,
3027 (plt_entry[4]
3028 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3029 splt->contents + eh->plt.offset + 16);
3030 }
3031 else
3032 {
3033 bfd_vma addr = got_entry - (splt->output_section->vma +
3034 splt->output_offset + eh->plt.offset);
3035
3036 bfd_put_32 (output_bfd,
3037 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3038 splt->contents + eh->plt.offset);
3039 bfd_put_32 (output_bfd,
3040 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3041 splt->contents + eh->plt.offset + 4);
3042 bfd_put_32 (output_bfd, plt_pic_entry[2],
3043 splt->contents + eh->plt.offset + 8);
3044 bfd_put_32 (output_bfd,
3045 (plt_pic_entry[3] | (plt_index << 3)),
3046 splt->contents + eh->plt.offset + 12);
3047 bfd_put_32 (output_bfd,
3048 (plt_pic_entry[4]
3049 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3050 splt->contents + eh->plt.offset + 16);
3051 }
3052
3053 /* Fill in the entry in the global offset table. */
3054 bfd_put_32 (output_bfd,
3055 (splt->output_section->vma
3056 + splt->output_offset
3057 + eh->plt.offset
3058 + 12), /* offset within PLT entry */
3059 sgot->contents + got_offset);
3060
3061 /* Fill in the entry in the .rela.plt section. */
3062 rel.r_offset = (sgot->output_section->vma
3063 + sgot->output_offset
3064 + got_offset);
3065 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3066 rel.r_addend = 0;
3067 loc = htab->etab.srelplt->contents;
3068 loc += plt_index * sizeof(Elf32_External_Rela);
3069 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3070
3071 if (!eh->def_regular)
3072 {
3073 /* Mark the symbol as undefined, rather than as defined in
3074 the .plt section. Leave the value alone. */
3075 sym->st_shndx = SHN_UNDEF;
3076 }
3077 }
3078
3079 if (eh->got.offset != (bfd_vma) -1
3080 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3081 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3082 {
3083 /* This symbol has an entry in the global offset table. Set it
3084 up. */
3085
3086 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3087 + htab->etab.sgot->output_offset
3088 + htab->etab.sgot->output_section->vma);
3089
3090 /* If this is a -Bsymbolic link and the symbol is defined
3091 locally or was forced to be local because of a version file,
3092 we just want to emit a RELATIVE reloc. The entry in the
3093 global offset table will already have been initialized in the
3094 relocate_section function. */
3095 if (bfd_link_pic (info)
3096 && (info->symbolic || eh->dynindx == -1)
3097 && eh->def_regular)
3098 {
3099 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3100 rel.r_addend = (eh->root.u.def.value
3101 + eh->root.u.def.section->output_offset
3102 + eh->root.u.def.section->output_section->vma);
3103 }
3104 else
3105 {
3106 if ((eh->got.offset & 1) != 0)
3107 abort ();
3108 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset);
3109 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3110 rel.r_addend = 0;
3111 }
3112
3113 loc = htab->etab.srelgot->contents;
3114 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3115 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3116 }
3117
3118 if (eh->needs_copy)
3119 {
3120 asection *s;
3121
3122 /* This symbol needs a copy reloc. Set it up. */
3123
3124 if (! (eh->dynindx != -1
3125 && (eh->root.type == bfd_link_hash_defined
3126 || eh->root.type == bfd_link_hash_defweak)))
3127 abort ();
3128
3129 rel.r_offset = (eh->root.u.def.value
3130 + eh->root.u.def.section->output_offset
3131 + eh->root.u.def.section->output_section->vma);
3132 rel.r_addend = 0;
3133 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3134 if (eh->root.u.def.section == htab->etab.sdynrelro)
3135 s = htab->etab.sreldynrelro;
3136 else
3137 s = htab->etab.srelbss;
3138 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3139 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3140 }
3141
3142 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3143 if (eh->root.root.string[0] == '_'
3144 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3145 || eh == htab->etab.hgot))
3146 {
3147 sym->st_shndx = SHN_ABS;
3148 }
3149
3150 return TRUE;
3151 }
3152
3153 /* Set the Meta ELF ABI version. */
3154
3155 static bfd_boolean
3156 elf_metag_init_file_header (bfd *abfd, struct bfd_link_info *link_info)
3157 {
3158 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3159
3160 if (!_bfd_elf_init_file_header (abfd, link_info))
3161 return FALSE;
3162
3163 i_ehdrp = elf_elfheader (abfd);
3164 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3165 return TRUE;
3166 }
3167
3168 /* Used to decide how to sort relocs in an optimal manner for the
3169 dynamic linker, before writing them out. */
3170
3171 static enum elf_reloc_type_class
3172 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3173 const asection *rel_sec ATTRIBUTE_UNUSED,
3174 const Elf_Internal_Rela *rela)
3175 {
3176 switch ((int) ELF32_R_TYPE (rela->r_info))
3177 {
3178 case R_METAG_RELATIVE:
3179 return reloc_class_relative;
3180 case R_METAG_JMP_SLOT:
3181 return reloc_class_plt;
3182 case R_METAG_COPY:
3183 return reloc_class_copy;
3184 default:
3185 return reloc_class_normal;
3186 }
3187 }
3188
3189 /* Finish up the dynamic sections. */
3190
3191 static bfd_boolean
3192 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3193 struct bfd_link_info *info)
3194 {
3195 bfd *dynobj;
3196 struct elf_metag_link_hash_table *htab;
3197 asection *sdyn;
3198
3199 htab = metag_link_hash_table (info);
3200 dynobj = htab->etab.dynobj;
3201
3202 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3203
3204 if (htab->etab.dynamic_sections_created)
3205 {
3206 asection *splt;
3207 Elf32_External_Dyn *dyncon, *dynconend;
3208
3209 if (sdyn == NULL)
3210 abort ();
3211
3212 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3213 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3214 for (; dyncon < dynconend; dyncon++)
3215 {
3216 Elf_Internal_Dyn dyn;
3217 asection *s;
3218
3219 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3220
3221 switch (dyn.d_tag)
3222 {
3223 default:
3224 continue;
3225
3226 case DT_PLTGOT:
3227 s = htab->etab.sgot;
3228 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3229 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3230 break;
3231
3232 case DT_JMPREL:
3233 s = htab->etab.srelplt;
3234 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3235 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3236 break;
3237
3238 case DT_PLTRELSZ:
3239 s = htab->etab.srelplt;
3240 dyn.d_un.d_val = s->size;
3241 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3242 break;
3243 }
3244
3245 }
3246
3247 /* Fill in the first entry in the procedure linkage table. */
3248 splt = htab->etab.splt;
3249 if (splt && splt->size > 0)
3250 {
3251 unsigned long addr;
3252 /* addr = .got + 4 */
3253 addr = (htab->etab.sgot->output_section->vma
3254 + htab->etab.sgot->output_offset + 4);
3255 if (bfd_link_pic (info))
3256 {
3257 addr -= splt->output_section->vma + splt->output_offset;
3258 bfd_put_32 (output_bfd,
3259 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3260 splt->contents);
3261 bfd_put_32 (output_bfd,
3262 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3263 splt->contents + 4);
3264 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3265 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3266 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3267 }
3268 else
3269 {
3270 bfd_put_32 (output_bfd,
3271 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3272 splt->contents);
3273 bfd_put_32 (output_bfd,
3274 plt0_entry[1] | ((addr & 0xffff) << 3),
3275 splt->contents + 4);
3276 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3277 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3278 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3279 }
3280
3281 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3282 PLT_ENTRY_SIZE;
3283 }
3284 }
3285
3286 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
3287 {
3288 /* Fill in the first entry in the global offset table.
3289 We use it to point to our dynamic section, if we have one. */
3290 bfd_put_32 (output_bfd,
3291 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3292 htab->etab.sgot->contents);
3293
3294 /* The second entry is reserved for use by the dynamic linker. */
3295 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3296
3297 /* Set .got entry size. */
3298 elf_section_data (htab->etab.sgot->output_section)
3299 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3300 }
3301
3302 return TRUE;
3303 }
3304
3305 /* Return the section that should be marked against GC for a given
3306 relocation. */
3307
3308 static asection *
3309 elf_metag_gc_mark_hook (asection *sec,
3310 struct bfd_link_info *info,
3311 Elf_Internal_Rela *rela,
3312 struct elf_link_hash_entry *hh,
3313 Elf_Internal_Sym *sym)
3314 {
3315 if (hh != NULL)
3316 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3317 {
3318 case R_METAG_GNU_VTINHERIT:
3319 case R_METAG_GNU_VTENTRY:
3320 return NULL;
3321 }
3322
3323 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3324 }
3325
3326 /* Determine the type of stub needed, if any, for a call. */
3327
3328 static enum elf_metag_stub_type
3329 metag_type_of_stub (asection *input_sec,
3330 const Elf_Internal_Rela *rel,
3331 struct elf_metag_link_hash_entry *hh,
3332 bfd_vma destination,
3333 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3334 {
3335 bfd_vma location;
3336 bfd_vma branch_offset;
3337 bfd_vma max_branch_offset;
3338
3339 if (hh != NULL &&
3340 !(hh->eh.root.type == bfd_link_hash_defined
3341 || hh->eh.root.type == bfd_link_hash_defweak))
3342 return metag_stub_none;
3343
3344 /* Determine where the call point is. */
3345 location = (input_sec->output_offset
3346 + input_sec->output_section->vma
3347 + rel->r_offset);
3348
3349 branch_offset = destination - location;
3350
3351 /* Determine if a long branch stub is needed. Meta branch offsets
3352 are signed 19 bits 4 byte aligned. */
3353 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3354
3355 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3356 {
3357 if (bfd_link_pic (info))
3358 return metag_stub_long_branch_shared;
3359 else
3360 return metag_stub_long_branch;
3361 }
3362
3363 return metag_stub_none;
3364 }
3365
3366 #define MOVT_A0_3 0x82180005
3367 #define JUMP_A0_3 0xac180003
3368
3369 #define MOVT_A1LBP 0x83080005
3370 #define ADD_A1LBP 0x83080000
3371
3372 #define ADDT_A0_3_CPC 0x82980001
3373 #define ADD_A0_3_A0_3 0x82180000
3374 #define MOV_PC_A0_3 0xa3180ca0
3375
3376 static bfd_boolean
3377 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
3378 {
3379 struct elf_metag_stub_hash_entry *hsh;
3380 asection *stub_sec;
3381 bfd *stub_bfd;
3382 bfd_byte *loc;
3383 bfd_vma sym_value;
3384 int size;
3385 struct bfd_link_info *info;
3386
3387 /* Massage our args to the form they really have. */
3388 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3389 info = (struct bfd_link_info *) in_arg;
3390
3391 /* Fail if the target section could not be assigned to an output
3392 section. The user should fix his linker script. */
3393 if (hsh->target_section->output_section == NULL
3394 && info->non_contiguous_regions)
3395 info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. "
3396 "Retry without --enable-non-contiguous-regions.\n"),
3397 hsh->target_section);
3398
3399 stub_sec = hsh->stub_sec;
3400
3401 /* Make a note of the offset within the stubs for this entry. */
3402 hsh->stub_offset = stub_sec->size;
3403 loc = stub_sec->contents + hsh->stub_offset;
3404
3405 stub_bfd = stub_sec->owner;
3406
3407 switch (hsh->stub_type)
3408 {
3409 case metag_stub_long_branch_shared:
3410 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3411 calculate the jump target using A0.3 as a temporary. Then a MOV
3412 to PC carries out the jump. */
3413 sym_value = (hsh->target_value
3414 + hsh->target_section->output_offset
3415 + hsh->target_section->output_section->vma
3416 + hsh->addend);
3417
3418 sym_value -= (hsh->stub_offset
3419 + stub_sec->output_offset
3420 + stub_sec->output_section->vma);
3421
3422 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3423 loc);
3424
3425 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3426 loc + 4);
3427
3428 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3429
3430 size = 12;
3431 break;
3432 case metag_stub_long_branch:
3433 /* A standard long branch stub is a MOVT instruction followed by a
3434 JUMP instruction using the A0.3 register as a temporary. This is
3435 the same method used by the LDLK linker (patch.c). */
3436 sym_value = (hsh->target_value
3437 + hsh->target_section->output_offset
3438 + hsh->target_section->output_section->vma
3439 + hsh->addend);
3440
3441 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3442 loc);
3443
3444 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3445
3446 size = 8;
3447 break;
3448 default:
3449 BFD_FAIL ();
3450 return FALSE;
3451 }
3452
3453 stub_sec->size += size;
3454 return TRUE;
3455 }
3456
3457 /* As above, but don't actually build the stub. Just bump offset so
3458 we know stub section sizes. */
3459
3460 static bfd_boolean
3461 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3462 {
3463 struct elf_metag_stub_hash_entry *hsh;
3464 int size = 0;
3465
3466 /* Massage our args to the form they really have. */
3467 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3468
3469 if (hsh->stub_type == metag_stub_long_branch)
3470 size = 8;
3471 else if (hsh->stub_type == metag_stub_long_branch_shared)
3472 size = 12;
3473
3474 hsh->stub_sec->size += size;
3475 return TRUE;
3476 }
3477
3478 /* Set up various things so that we can make a list of input sections
3479 for each output section included in the link. Returns -1 on error,
3480 0 when no stubs will be needed, and 1 on success. */
3481
3482 int
3483 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3484 {
3485 bfd *input_bfd;
3486 unsigned int bfd_count;
3487 unsigned int top_id, top_index;
3488 asection *section;
3489 asection **input_list, **list;
3490 size_t amt;
3491 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3492
3493 /* Count the number of input BFDs and find the top input section id. */
3494 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3495 input_bfd != NULL;
3496 input_bfd = input_bfd->link.next)
3497 {
3498 bfd_count += 1;
3499 for (section = input_bfd->sections;
3500 section != NULL;
3501 section = section->next)
3502 {
3503 if (top_id < section->id)
3504 top_id = section->id;
3505 }
3506 }
3507
3508 htab->bfd_count = bfd_count;
3509
3510 amt = sizeof (struct map_stub) * (top_id + 1);
3511 htab->stub_group = bfd_zmalloc (amt);
3512 if (htab->stub_group == NULL)
3513 return -1;
3514
3515 /* We can't use output_bfd->section_count here to find the top output
3516 section index as some sections may have been removed, and
3517 strip_excluded_output_sections doesn't renumber the indices. */
3518 for (section = output_bfd->sections, top_index = 0;
3519 section != NULL;
3520 section = section->next)
3521 {
3522 if (top_index < section->index)
3523 top_index = section->index;
3524 }
3525
3526 htab->top_index = top_index;
3527 amt = sizeof (asection *) * (top_index + 1);
3528 input_list = bfd_malloc (amt);
3529 htab->input_list = input_list;
3530 if (input_list == NULL)
3531 return -1;
3532
3533 /* For sections we aren't interested in, mark their entries with a
3534 value we can check later. */
3535 list = input_list + top_index;
3536 do
3537 *list = bfd_abs_section_ptr;
3538 while (list-- != input_list);
3539
3540 for (section = output_bfd->sections;
3541 section != NULL;
3542 section = section->next)
3543 {
3544 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3545 * have PC relative relocs in them but no code flag set. */
3546 if (((section->flags & SEC_CODE) != 0) ||
3547 strcmp(".ctors", section->name) ||
3548 strcmp(".dtors", section->name))
3549 input_list[section->index] = NULL;
3550 }
3551
3552 return 1;
3553 }
3554
3555 /* The linker repeatedly calls this function for each input section,
3556 in the order that input sections are linked into output sections.
3557 Build lists of input sections to determine groupings between which
3558 we may insert linker stubs. */
3559
3560 void
3561 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3562 {
3563 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3564
3565 if (isec->output_section->index <= htab->top_index)
3566 {
3567 asection **list = htab->input_list + isec->output_section->index;
3568 if (*list != bfd_abs_section_ptr)
3569 {
3570 /* Steal the link_sec pointer for our list. */
3571 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3572 /* This happens to make the list in reverse order,
3573 which is what we want. */
3574 PREV_SEC (isec) = *list;
3575 *list = isec;
3576 }
3577 }
3578 }
3579
3580 /* See whether we can group stub sections together. Grouping stub
3581 sections may result in fewer stubs. More importantly, we need to
3582 put all .init* and .fini* stubs at the beginning of the .init or
3583 .fini output sections respectively, because glibc splits the
3584 _init and _fini functions into multiple parts. Putting a stub in
3585 the middle of a function is not a good idea. */
3586
3587 static void
3588 group_sections (struct elf_metag_link_hash_table *htab,
3589 bfd_size_type stub_group_size,
3590 bfd_boolean stubs_always_before_branch)
3591 {
3592 asection **list = htab->input_list + htab->top_index;
3593 do
3594 {
3595 asection *tail = *list;
3596 if (tail == bfd_abs_section_ptr)
3597 continue;
3598 while (tail != NULL)
3599 {
3600 asection *curr;
3601 asection *prev;
3602 bfd_size_type total;
3603 bfd_boolean big_sec;
3604
3605 curr = tail;
3606 total = tail->size;
3607 big_sec = total >= stub_group_size;
3608
3609 while ((prev = PREV_SEC (curr)) != NULL
3610 && ((total += curr->output_offset - prev->output_offset)
3611 < stub_group_size))
3612 curr = prev;
3613
3614 /* OK, the size from the start of CURR to the end is less
3615 than stub_group_size bytes and thus can be handled by one stub
3616 section. (or the tail section is itself larger than
3617 stub_group_size bytes, in which case we may be toast.)
3618 We should really be keeping track of the total size of
3619 stubs added here, as stubs contribute to the final output
3620 section size. */
3621 do
3622 {
3623 prev = PREV_SEC (tail);
3624 /* Set up this stub group. */
3625 htab->stub_group[tail->id].link_sec = curr;
3626 }
3627 while (tail != curr && (tail = prev) != NULL);
3628
3629 /* But wait, there's more! Input sections up to stub_group_size
3630 bytes before the stub section can be handled by it too.
3631 Don't do this if we have a really large section after the
3632 stubs, as adding more stubs increases the chance that
3633 branches may not reach into the stub section. */
3634 if (!stubs_always_before_branch && !big_sec)
3635 {
3636 total = 0;
3637 while (prev != NULL
3638 && ((total += tail->output_offset - prev->output_offset)
3639 < stub_group_size))
3640 {
3641 tail = prev;
3642 prev = PREV_SEC (tail);
3643 htab->stub_group[tail->id].link_sec = curr;
3644 }
3645 }
3646 tail = prev;
3647 }
3648 }
3649 while (list-- != htab->input_list);
3650 free (htab->input_list);
3651 #undef PREV_SEC
3652 }
3653
3654 /* Read in all local syms for all input bfds.
3655 Returns -1 on error, 0 otherwise. */
3656
3657 static int
3658 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3659 struct bfd_link_info *info)
3660 {
3661 unsigned int bfd_indx;
3662 Elf_Internal_Sym *local_syms, **all_local_syms;
3663 int stub_changed = 0;
3664 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3665
3666 /* We want to read in symbol extension records only once. To do this
3667 we need to read in the local symbols in parallel and save them for
3668 later use; so hold pointers to the local symbols in an array. */
3669 size_t amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3670 all_local_syms = bfd_zmalloc (amt);
3671 htab->all_local_syms = all_local_syms;
3672 if (all_local_syms == NULL)
3673 return -1;
3674
3675 /* Walk over all the input BFDs, swapping in local symbols. */
3676 for (bfd_indx = 0;
3677 input_bfd != NULL;
3678 input_bfd = input_bfd->link.next, bfd_indx++)
3679 {
3680 Elf_Internal_Shdr *symtab_hdr;
3681
3682 /* We'll need the symbol table in a second. */
3683 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3684 if (symtab_hdr->sh_info == 0)
3685 continue;
3686
3687 /* We need an array of the local symbols attached to the input bfd. */
3688 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3689 if (local_syms == NULL)
3690 {
3691 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3692 symtab_hdr->sh_info, 0,
3693 NULL, NULL, NULL);
3694 /* Cache them for elf_link_input_bfd. */
3695 symtab_hdr->contents = (unsigned char *) local_syms;
3696 }
3697 if (local_syms == NULL)
3698 return -1;
3699
3700 all_local_syms[bfd_indx] = local_syms;
3701 }
3702
3703 return stub_changed;
3704 }
3705
3706 /* Determine and set the size of the stub section for a final link.
3707
3708 The basic idea here is to examine all the relocations looking for
3709 PC-relative calls to a target that is unreachable with a "CALLR"
3710 instruction. */
3711
3712 /* See elf32-hppa.c and elf64-ppc.c. */
3713
3714 bfd_boolean
3715 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3716 struct bfd_link_info *info,
3717 bfd_signed_vma group_size,
3718 asection * (*add_stub_section) (const char *, asection *),
3719 void (*layout_sections_again) (void))
3720 {
3721 bfd_size_type stub_group_size;
3722 bfd_boolean stubs_always_before_branch;
3723 bfd_boolean stub_changed;
3724 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3725
3726 /* Stash our params away. */
3727 htab->stub_bfd = stub_bfd;
3728 htab->add_stub_section = add_stub_section;
3729 htab->layout_sections_again = layout_sections_again;
3730 stubs_always_before_branch = group_size < 0;
3731 if (group_size < 0)
3732 stub_group_size = -group_size;
3733 else
3734 stub_group_size = group_size;
3735 if (stub_group_size == 1)
3736 {
3737 /* Default values. */
3738 /* FIXME: not sure what these values should be */
3739 if (stubs_always_before_branch)
3740 {
3741 stub_group_size = (1 << BRANCH_BITS);
3742 }
3743 else
3744 {
3745 stub_group_size = (1 << BRANCH_BITS);
3746 }
3747 }
3748
3749 group_sections (htab, stub_group_size, stubs_always_before_branch);
3750
3751 switch (get_local_syms (output_bfd, info->input_bfds, info))
3752 {
3753 default:
3754 if (htab->all_local_syms)
3755 goto error_ret_free_local;
3756 return FALSE;
3757
3758 case 0:
3759 stub_changed = FALSE;
3760 break;
3761
3762 case 1:
3763 stub_changed = TRUE;
3764 break;
3765 }
3766
3767 while (1)
3768 {
3769 bfd *input_bfd;
3770 unsigned int bfd_indx;
3771 asection *stub_sec;
3772
3773 for (input_bfd = info->input_bfds, bfd_indx = 0;
3774 input_bfd != NULL;
3775 input_bfd = input_bfd->link.next, bfd_indx++)
3776 {
3777 Elf_Internal_Shdr *symtab_hdr;
3778 asection *section;
3779 Elf_Internal_Sym *local_syms;
3780
3781 /* We'll need the symbol table in a second. */
3782 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3783 if (symtab_hdr->sh_info == 0)
3784 continue;
3785
3786 local_syms = htab->all_local_syms[bfd_indx];
3787
3788 /* Walk over each section attached to the input bfd. */
3789 for (section = input_bfd->sections;
3790 section != NULL;
3791 section = section->next)
3792 {
3793 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3794
3795 /* If there aren't any relocs, then there's nothing more
3796 to do. */
3797 if ((section->flags & SEC_RELOC) == 0
3798 || section->reloc_count == 0)
3799 continue;
3800
3801 /* If this section is a link-once section that will be
3802 discarded, then don't create any stubs. */
3803 if (section->output_section == NULL
3804 || section->output_section->owner != output_bfd)
3805 continue;
3806
3807 /* Get the relocs. */
3808 internal_relocs
3809 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
3810 info->keep_memory);
3811 if (internal_relocs == NULL)
3812 goto error_ret_free_local;
3813
3814 /* Now examine each relocation. */
3815 irela = internal_relocs;
3816 irelaend = irela + section->reloc_count;
3817 for (; irela < irelaend; irela++)
3818 {
3819 unsigned int r_type, r_indx;
3820 enum elf_metag_stub_type stub_type;
3821 struct elf_metag_stub_hash_entry *hsh;
3822 asection *sym_sec;
3823 bfd_vma sym_value;
3824 bfd_vma destination;
3825 struct elf_metag_link_hash_entry *hh;
3826 char *stub_name;
3827 const asection *id_sec;
3828
3829 r_type = ELF32_R_TYPE (irela->r_info);
3830 r_indx = ELF32_R_SYM (irela->r_info);
3831
3832 if (r_type >= (unsigned int) R_METAG_MAX)
3833 {
3834 bfd_set_error (bfd_error_bad_value);
3835 error_ret_free_internal:
3836 if (elf_section_data (section)->relocs == NULL)
3837 free (internal_relocs);
3838 goto error_ret_free_local;
3839 }
3840
3841 /* Only look for stubs on CALLR and B instructions. */
3842 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
3843 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
3844 continue;
3845
3846 /* Now determine the call target, its name, value,
3847 section. */
3848 sym_sec = NULL;
3849 sym_value = 0;
3850 destination = 0;
3851 hh = NULL;
3852 if (r_indx < symtab_hdr->sh_info)
3853 {
3854 /* It's a local symbol. */
3855 Elf_Internal_Sym *sym;
3856 Elf_Internal_Shdr *hdr;
3857 unsigned int shndx;
3858
3859 sym = local_syms + r_indx;
3860 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3861 sym_value = sym->st_value;
3862 shndx = sym->st_shndx;
3863 if (shndx < elf_numsections (input_bfd))
3864 {
3865 hdr = elf_elfsections (input_bfd)[shndx];
3866 sym_sec = hdr->bfd_section;
3867 destination = (sym_value + irela->r_addend
3868 + sym_sec->output_offset
3869 + sym_sec->output_section->vma);
3870 }
3871 }
3872 else
3873 {
3874 /* It's an external symbol. */
3875 int e_indx;
3876
3877 e_indx = r_indx - symtab_hdr->sh_info;
3878 hh = ((struct elf_metag_link_hash_entry *)
3879 elf_sym_hashes (input_bfd)[e_indx]);
3880
3881 while (hh->eh.root.type == bfd_link_hash_indirect
3882 || hh->eh.root.type == bfd_link_hash_warning)
3883 hh = ((struct elf_metag_link_hash_entry *)
3884 hh->eh.root.u.i.link);
3885
3886 if (hh->eh.root.type == bfd_link_hash_defined
3887 || hh->eh.root.type == bfd_link_hash_defweak)
3888 {
3889 sym_sec = hh->eh.root.u.def.section;
3890 sym_value = hh->eh.root.u.def.value;
3891 if (hh->eh.plt.offset != (bfd_vma) -1
3892 && hh->eh.dynindx != -1
3893 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
3894 {
3895 sym_sec = htab->etab.splt;
3896 sym_value = hh->eh.plt.offset;
3897 }
3898
3899 if (sym_sec->output_section != NULL)
3900 destination = (sym_value + irela->r_addend
3901 + sym_sec->output_offset
3902 + sym_sec->output_section->vma);
3903 else
3904 continue;
3905 }
3906 else if (hh->eh.root.type == bfd_link_hash_undefweak)
3907 {
3908 if (! bfd_link_pic (info))
3909 continue;
3910 }
3911 else if (hh->eh.root.type == bfd_link_hash_undefined)
3912 {
3913 if (! (info->unresolved_syms_in_objects == RM_IGNORE
3914 && (ELF_ST_VISIBILITY (hh->eh.other)
3915 == STV_DEFAULT)))
3916 continue;
3917 }
3918 else
3919 {
3920 bfd_set_error (bfd_error_bad_value);
3921 goto error_ret_free_internal;
3922 }
3923 }
3924
3925 /* Determine what (if any) linker stub is needed. */
3926 stub_type = metag_type_of_stub (section, irela, hh,
3927 destination, info);
3928 if (stub_type == metag_stub_none)
3929 continue;
3930
3931 /* Support for grouping stub sections. */
3932 id_sec = htab->stub_group[section->id].link_sec;
3933
3934 /* Get the name of this stub. */
3935 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
3936 if (!stub_name)
3937 goto error_ret_free_internal;
3938
3939 hsh = metag_stub_hash_lookup (&htab->bstab,
3940 stub_name,
3941 FALSE, FALSE);
3942 if (hsh != NULL)
3943 {
3944 /* The proper stub has already been created. */
3945 free (stub_name);
3946 continue;
3947 }
3948
3949 hsh = metag_add_stub (stub_name, section, htab);
3950 if (hsh == NULL)
3951 {
3952 free (stub_name);
3953 goto error_ret_free_internal;
3954 }
3955 hsh->target_value = sym_value;
3956 hsh->target_section = sym_sec;
3957 hsh->stub_type = stub_type;
3958 hsh->hh = hh;
3959 hsh->addend = irela->r_addend;
3960 stub_changed = TRUE;
3961 }
3962
3963 /* We're done with the internal relocs, free them. */
3964 if (elf_section_data (section)->relocs == NULL)
3965 free (internal_relocs);
3966 }
3967 }
3968
3969 if (!stub_changed)
3970 break;
3971
3972 /* OK, we've added some stubs. Find out the new size of the
3973 stub sections. */
3974 for (stub_sec = htab->stub_bfd->sections;
3975 stub_sec != NULL;
3976 stub_sec = stub_sec->next)
3977 stub_sec->size = 0;
3978
3979 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
3980
3981 /* Ask the linker to do its stuff. */
3982 (*htab->layout_sections_again) ();
3983 stub_changed = FALSE;
3984 }
3985
3986 free (htab->all_local_syms);
3987 return TRUE;
3988
3989 error_ret_free_local:
3990 free (htab->all_local_syms);
3991 return FALSE;
3992 }
3993
3994 /* Build all the stubs associated with the current output file. The
3995 stubs are kept in a hash table attached to the main linker hash
3996 table. This function is called via metagelf_finish in the linker. */
3997
3998 bfd_boolean
3999 elf_metag_build_stubs (struct bfd_link_info *info)
4000 {
4001 asection *stub_sec;
4002 struct bfd_hash_table *table;
4003 struct elf_metag_link_hash_table *htab;
4004
4005 htab = metag_link_hash_table (info);
4006
4007 for (stub_sec = htab->stub_bfd->sections;
4008 stub_sec != NULL;
4009 stub_sec = stub_sec->next)
4010 {
4011 bfd_size_type size;
4012
4013 /* Allocate memory to hold the linker stubs. */
4014 size = stub_sec->size;
4015 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4016 if (stub_sec->contents == NULL && size != 0)
4017 return FALSE;
4018 stub_sec->size = 0;
4019 }
4020
4021 /* Build the stubs as directed by the stub hash table. */
4022 table = &htab->bstab;
4023 bfd_hash_traverse (table, metag_build_one_stub, info);
4024
4025 return TRUE;
4026 }
4027
4028 /* Return TRUE if SYM represents a local label symbol. */
4029
4030 static bfd_boolean
4031 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4032 {
4033 if (name[0] == '$' && name[1] == 'L')
4034 return 1;
4035 return _bfd_elf_is_local_label_name (abfd, name);
4036 }
4037
4038 /* Return address for Ith PLT stub in section PLT, for relocation REL
4039 or (bfd_vma) -1 if it should not be included. */
4040
4041 static bfd_vma
4042 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4043 const arelent *rel ATTRIBUTE_UNUSED)
4044 {
4045 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4046 }
4047
4048 #define ELF_ARCH bfd_arch_metag
4049 #define ELF_TARGET_ID METAG_ELF_DATA
4050 #define ELF_MACHINE_CODE EM_METAG
4051 #define ELF_MINPAGESIZE 0x1000
4052 #define ELF_MAXPAGESIZE 0x4000
4053 #define ELF_COMMONPAGESIZE 0x1000
4054
4055 #define TARGET_LITTLE_SYM metag_elf32_vec
4056 #define TARGET_LITTLE_NAME "elf32-metag"
4057
4058 #define elf_symbol_leading_char '_'
4059
4060 #define elf_info_to_howto_rel NULL
4061 #define elf_info_to_howto metag_info_to_howto_rela
4062
4063 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4064 #define bfd_elf32_bfd_link_hash_table_create \
4065 elf_metag_link_hash_table_create
4066 #define elf_backend_relocate_section elf_metag_relocate_section
4067 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4068 #define elf_backend_check_relocs elf_metag_check_relocs
4069 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4070 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4071 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4072 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4073 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4074 #define elf_backend_omit_section_dynsym \
4075 _bfd_elf_omit_section_dynsym_all
4076 #define elf_backend_init_file_header elf_metag_init_file_header
4077 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4078 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4079 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4080
4081 #define elf_backend_can_gc_sections 1
4082 #define elf_backend_can_refcount 1
4083 #define elf_backend_rela_normal 1
4084 #define elf_backend_want_got_plt 1
4085 #define elf_backend_want_got_sym 0
4086 #define elf_backend_want_plt_sym 0
4087 #define elf_backend_plt_readonly 1
4088 #define elf_backend_dtrel_excludes_plt 1
4089 #define elf_backend_want_dynrelro 1
4090
4091 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4092 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4093
4094 #include "elf32-target.h"
GDB Binutils - Deliverables
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