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Add c-format tags to translatable strings with more than one argument-using formattin...
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2016 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
28
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32 /* ABI version:
33 0 - original
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
36
37 static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46 static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55 static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64 static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95 static reloc_howto_type elf_metag_howto_table[] =
96 {
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 };
682
683 #define BRANCH_BITS 19
684
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
695
696 struct metag_reloc_map
697 {
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700 };
701
702 static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746 enum elf_metag_stub_type
747 {
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751 };
752
753 struct elf_metag_stub_hash_entry
754 {
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780 };
781
782 struct elf_metag_link_hash_entry
783 {
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811 };
812
813 struct elf_metag_link_hash_table
814 {
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 unsigned int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sgot;
847 asection *sgotplt;
848 asection *srelgot;
849 asection *splt;
850 asection *srelplt;
851 asection *sdynbss;
852 asection *srelbss;
853
854 /* Small local sym cache. */
855 struct sym_cache sym_cache;
856
857 /* Data for LDM relocations. */
858 union
859 {
860 bfd_signed_vma refcount;
861 bfd_vma offset;
862 } tls_ldm_got;
863 };
864
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
867 segment p_vaddr. */
868 static bfd_vma
869 dtpoff_base (struct bfd_link_info *info)
870 {
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info)->tls_sec == NULL)
873 return 0;
874 return elf_hash_table (info)->tls_sec->vma;
875 }
876
877 /* Return the relocation value for R_METAG_TLS_IE */
878 static bfd_vma
879 tpoff (struct bfd_link_info *info, bfd_vma address)
880 {
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info)->tls_sec == NULL)
883 return 0;
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address - elf_hash_table (info)->tls_sec->vma
887 + align_power ((bfd_vma) 8,
888 elf_hash_table (info)->tls_sec->alignment_power));
889 }
890
891 static void
892 metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
893 arelent *cache_ptr,
894 Elf_Internal_Rela *dst)
895 {
896 unsigned int r_type;
897
898 r_type = ELF32_R_TYPE (dst->r_info);
899 if (r_type >= (unsigned int) R_METAG_MAX)
900 {
901 /* xgettext:c-format */
902 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
903 r_type = 0;
904 }
905 cache_ptr->howto = & elf_metag_howto_table [r_type];
906 }
907
908 static reloc_howto_type *
909 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
910 bfd_reloc_code_real_type code)
911 {
912 unsigned int i;
913
914 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
915 if (metag_reloc_map [i].bfd_reloc_val == code)
916 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
917
918 return NULL;
919 }
920
921 static reloc_howto_type *
922 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
923 const char *r_name)
924 {
925 unsigned int i;
926
927 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
928 if (elf_metag_howto_table[i].name != NULL
929 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
930 return &elf_metag_howto_table[i];
931
932 return NULL;
933 }
934
935 /* Various hash macros and functions. */
936 #define metag_link_hash_table(p) \
937 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
938 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
939
940 #define metag_elf_hash_entry(ent) \
941 ((struct elf_metag_link_hash_entry *)(ent))
942
943 #define metag_stub_hash_entry(ent) \
944 ((struct elf_metag_stub_hash_entry *)(ent))
945
946 #define metag_stub_hash_lookup(table, string, create, copy) \
947 ((struct elf_metag_stub_hash_entry *) \
948 bfd_hash_lookup ((table), (string), (create), (copy)))
949
950 #define metag_elf_local_got_tls_type(abfd) \
951 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
952
953 /* Assorted hash table functions. */
954
955 /* Initialize an entry in the stub hash table. */
956
957 static struct bfd_hash_entry *
958 stub_hash_newfunc (struct bfd_hash_entry *entry,
959 struct bfd_hash_table *table,
960 const char *string)
961 {
962 /* Allocate the structure if it has not already been allocated by a
963 subclass. */
964 if (entry == NULL)
965 {
966 entry = bfd_hash_allocate (table,
967 sizeof (struct elf_metag_stub_hash_entry));
968 if (entry == NULL)
969 return entry;
970 }
971
972 /* Call the allocation method of the superclass. */
973 entry = bfd_hash_newfunc (entry, table, string);
974 if (entry != NULL)
975 {
976 struct elf_metag_stub_hash_entry *hsh;
977
978 /* Initialize the local fields. */
979 hsh = (struct elf_metag_stub_hash_entry *) entry;
980 hsh->stub_sec = NULL;
981 hsh->stub_offset = 0;
982 hsh->target_value = 0;
983 hsh->target_section = NULL;
984 hsh->stub_type = metag_stub_long_branch;
985 hsh->hh = NULL;
986 hsh->id_sec = NULL;
987 }
988
989 return entry;
990 }
991
992 /* Initialize an entry in the link hash table. */
993
994 static struct bfd_hash_entry *
995 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
996 struct bfd_hash_table *table,
997 const char *string)
998 {
999 /* Allocate the structure if it has not already been allocated by a
1000 subclass. */
1001 if (entry == NULL)
1002 {
1003 entry = bfd_hash_allocate (table,
1004 sizeof (struct elf_metag_link_hash_entry));
1005 if (entry == NULL)
1006 return entry;
1007 }
1008
1009 /* Call the allocation method of the superclass. */
1010 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1011 if (entry != NULL)
1012 {
1013 struct elf_metag_link_hash_entry *hh;
1014
1015 /* Initialize the local fields. */
1016 hh = (struct elf_metag_link_hash_entry *) entry;
1017 hh->hsh_cache = NULL;
1018 hh->dyn_relocs = NULL;
1019 hh->tls_type = GOT_UNKNOWN;
1020 }
1021
1022 return entry;
1023 }
1024
1025 /* Free the derived linker hash table. */
1026
1027 static void
1028 elf_metag_link_hash_table_free (bfd *obfd)
1029 {
1030 struct elf_metag_link_hash_table *htab
1031 = (struct elf_metag_link_hash_table *) obfd->link.hash;
1032
1033 bfd_hash_table_free (&htab->bstab);
1034 _bfd_elf_link_hash_table_free (obfd);
1035 }
1036
1037 /* Create the derived linker hash table. The Meta ELF port uses the derived
1038 hash table to keep information specific to the Meta ELF linker (without
1039 using static variables). */
1040
1041 static struct bfd_link_hash_table *
1042 elf_metag_link_hash_table_create (bfd *abfd)
1043 {
1044 struct elf_metag_link_hash_table *htab;
1045 bfd_size_type amt = sizeof (*htab);
1046
1047 htab = bfd_zmalloc (amt);
1048 if (htab == NULL)
1049 return NULL;
1050
1051 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1052 metag_link_hash_newfunc,
1053 sizeof (struct elf_metag_link_hash_entry),
1054 METAG_ELF_DATA))
1055 {
1056 free (htab);
1057 return NULL;
1058 }
1059
1060 /* Init the stub hash table too. */
1061 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1062 sizeof (struct elf_metag_stub_hash_entry)))
1063 {
1064 _bfd_elf_link_hash_table_free (abfd);
1065 return NULL;
1066 }
1067 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
1068
1069 return &htab->etab.root;
1070 }
1071
1072 /* Section name for stubs is the associated section name plus this
1073 string. */
1074 #define STUB_SUFFIX ".stub"
1075
1076 /* Build a name for an entry in the stub hash table. */
1077
1078 static char *
1079 metag_stub_name (const asection *input_section,
1080 const asection *sym_sec,
1081 const struct elf_metag_link_hash_entry *hh,
1082 const Elf_Internal_Rela *rel)
1083 {
1084 char *stub_name;
1085 bfd_size_type len;
1086
1087 if (hh)
1088 {
1089 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1090 stub_name = bfd_malloc (len);
1091 if (stub_name != NULL)
1092 {
1093 sprintf (stub_name, "%08x_%s+%x",
1094 input_section->id & 0xffffffff,
1095 hh->eh.root.root.string,
1096 (int) rel->r_addend & 0xffffffff);
1097 }
1098 }
1099 else
1100 {
1101 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1102 stub_name = bfd_malloc (len);
1103 if (stub_name != NULL)
1104 {
1105 sprintf (stub_name, "%08x_%x:%x+%x",
1106 input_section->id & 0xffffffff,
1107 sym_sec->id & 0xffffffff,
1108 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1109 (int) rel->r_addend & 0xffffffff);
1110 }
1111 }
1112 return stub_name;
1113 }
1114
1115 /* Look up an entry in the stub hash. Stub entries are cached because
1116 creating the stub name takes a bit of time. */
1117
1118 static struct elf_metag_stub_hash_entry *
1119 metag_get_stub_entry (const asection *input_section,
1120 const asection *sym_sec,
1121 struct elf_metag_link_hash_entry *hh,
1122 const Elf_Internal_Rela *rel,
1123 struct elf_metag_link_hash_table *htab)
1124 {
1125 struct elf_metag_stub_hash_entry *hsh;
1126 const asection *id_sec;
1127
1128 /* If this input section is part of a group of sections sharing one
1129 stub section, then use the id of the first section in the group.
1130 Stub names need to include a section id, as there may well be
1131 more than one stub used to reach say, printf, and we need to
1132 distinguish between them. */
1133 id_sec = htab->stub_group[input_section->id].link_sec;
1134
1135 if (hh != NULL && hh->hsh_cache != NULL
1136 && hh->hsh_cache->hh == hh
1137 && hh->hsh_cache->id_sec == id_sec)
1138 {
1139 hsh = hh->hsh_cache;
1140 }
1141 else
1142 {
1143 char *stub_name;
1144
1145 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1146 if (stub_name == NULL)
1147 return NULL;
1148
1149 hsh = metag_stub_hash_lookup (&htab->bstab,
1150 stub_name, FALSE, FALSE);
1151
1152 if (hh != NULL)
1153 hh->hsh_cache = hsh;
1154
1155 free (stub_name);
1156 }
1157
1158 return hsh;
1159 }
1160
1161 /* Add a new stub entry to the stub hash. Not all fields of the new
1162 stub entry are initialised. */
1163
1164 static struct elf_metag_stub_hash_entry *
1165 metag_add_stub (const char *stub_name,
1166 asection *section,
1167 struct elf_metag_link_hash_table *htab)
1168 {
1169 asection *link_sec;
1170 asection *stub_sec;
1171 struct elf_metag_stub_hash_entry *hsh;
1172
1173 link_sec = htab->stub_group[section->id].link_sec;
1174 stub_sec = htab->stub_group[section->id].stub_sec;
1175 if (stub_sec == NULL)
1176 {
1177 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1178 if (stub_sec == NULL)
1179 {
1180 size_t namelen;
1181 bfd_size_type len;
1182 char *s_name;
1183
1184 namelen = strlen (link_sec->name);
1185 len = namelen + sizeof (STUB_SUFFIX);
1186 s_name = bfd_alloc (htab->stub_bfd, len);
1187 if (s_name == NULL)
1188 return NULL;
1189
1190 memcpy (s_name, link_sec->name, namelen);
1191 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1192
1193 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1194 if (stub_sec == NULL)
1195 return NULL;
1196 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1197 }
1198 htab->stub_group[section->id].stub_sec = stub_sec;
1199 }
1200
1201 /* Enter this entry into the linker stub hash table. */
1202 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1203 TRUE, FALSE);
1204 if (hsh == NULL)
1205 {
1206 /* xgettext:c-format */
1207 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1208 section->owner, stub_name);
1209 return NULL;
1210 }
1211
1212 hsh->stub_sec = stub_sec;
1213 hsh->stub_offset = 0;
1214 hsh->id_sec = link_sec;
1215 return hsh;
1216 }
1217
1218 /* Check a signed integer value can be represented in the given number
1219 of bits. */
1220
1221 static bfd_boolean
1222 within_signed_range (int value, unsigned int bits)
1223 {
1224 int min_val = -(1 << (bits - 1));
1225 int max_val = (1 << (bits - 1)) - 1;
1226 return (value <= max_val) && (value >= min_val);
1227 }
1228
1229 /* Perform a relocation as part of a final link. */
1230
1231 static bfd_reloc_status_type
1232 metag_final_link_relocate (reloc_howto_type *howto,
1233 bfd *input_bfd,
1234 asection *input_section,
1235 bfd_byte *contents,
1236 Elf_Internal_Rela *rel,
1237 bfd_vma relocation,
1238 struct elf_metag_link_hash_entry *hh,
1239 struct elf_metag_link_hash_table *htab,
1240 asection *sym_sec)
1241 {
1242 bfd_reloc_status_type r = bfd_reloc_ok;
1243 bfd_byte *hit_data = contents + rel->r_offset;
1244 int opcode, op_shift, op_extended, l1, l2;
1245 bfd_signed_vma srel, addend = rel->r_addend;
1246 struct elf_metag_stub_hash_entry *hsh = NULL;
1247 bfd_vma location;
1248
1249 /* Find out where we are and where we're going. */
1250 location = (rel->r_offset +
1251 input_section->output_offset +
1252 input_section->output_section->vma);
1253
1254 switch (howto->type)
1255 {
1256 case R_METAG_RELBRANCH:
1257 case R_METAG_RELBRANCH_PLT:
1258 /* Make it a pc relative offset. */
1259 relocation -= location;
1260 break;
1261 case R_METAG_TLS_GD:
1262 case R_METAG_TLS_IE:
1263 relocation -= elf_gp (input_section->output_section->owner);
1264 break;
1265 default:
1266 break;
1267 }
1268
1269 switch (howto->type)
1270 {
1271 case R_METAG_RELBRANCH_PLT:
1272 case R_METAG_RELBRANCH:
1273 opcode = bfd_get_32 (input_bfd, hit_data);
1274
1275 srel = (bfd_signed_vma) relocation;
1276 srel += addend;
1277
1278 /* If the branch is out of reach, then redirect the
1279 call to the local stub for this function. */
1280 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1281 (srel < - (1 << (BRANCH_BITS + 1))))
1282 {
1283 if (sym_sec == NULL)
1284 break;
1285
1286 hsh = metag_get_stub_entry (input_section, sym_sec,
1287 hh, rel, htab);
1288 if (hsh == NULL)
1289 return bfd_reloc_undefined;
1290
1291 /* Munge up the value and addend so that we call the stub
1292 rather than the procedure directly. */
1293 srel = (hsh->stub_offset
1294 + hsh->stub_sec->output_offset
1295 + hsh->stub_sec->output_section->vma);
1296 srel -= location;
1297 }
1298
1299 srel = srel >> 2;
1300
1301 if (!within_signed_range (srel, BRANCH_BITS))
1302 {
1303 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1304 srel = 0;
1305 else
1306 return bfd_reloc_overflow;
1307 }
1308
1309 opcode &= ~(0x7ffff << 5);
1310 opcode |= ((srel & 0x7ffff) << 5);
1311
1312 bfd_put_32 (input_bfd, opcode, hit_data);
1313 break;
1314 case R_METAG_GETSETOFF:
1315 case R_METAG_GETSET_GOT:
1316 case R_METAG_GETSET_GOTOFF:
1317 opcode = bfd_get_32 (input_bfd, hit_data);
1318
1319 srel = (bfd_signed_vma) relocation;
1320 srel += addend;
1321
1322 /* Is this a standard or extended GET/SET? */
1323 if ((opcode & 0xf0000000) == 0xa0000000)
1324 {
1325 /* Extended GET/SET. */
1326 l1 = opcode & 0x2;
1327 l2 = opcode & 0x4;
1328 op_extended = 1;
1329 }
1330 else
1331 {
1332 /* Standard GET/SET. */
1333 l1 = opcode & 0x01000000;
1334 l2 = opcode & 0x04000000;
1335 op_extended = 0;
1336 }
1337
1338 /* Calculate the width of the GET/SET and how much we need to
1339 shift the result by. */
1340 if (l2)
1341 if (l1)
1342 op_shift = 3;
1343 else
1344 op_shift = 2;
1345 else
1346 if (l1)
1347 op_shift = 1;
1348 else
1349 op_shift = 0;
1350
1351 /* GET/SET offsets are scaled by the width of the transfer. */
1352 srel = srel >> op_shift;
1353
1354 /* Extended GET/SET has signed 12 bits of offset, standard has
1355 signed 6 bits. */
1356 if (op_extended)
1357 {
1358 if (!within_signed_range (srel, 12))
1359 {
1360 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1361 srel = 0;
1362 else
1363 return bfd_reloc_overflow;
1364 }
1365 opcode &= ~(0xfff << 7);
1366 opcode |= ((srel & 0xfff) << 7);
1367 }
1368 else
1369 {
1370 if (!within_signed_range (srel, 5))
1371 {
1372 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1373 srel = 0;
1374 else
1375 return bfd_reloc_overflow;
1376 }
1377 opcode &= ~(0x3f << 8);
1378 opcode |= ((srel & 0x3f) << 8);
1379 }
1380
1381 bfd_put_32 (input_bfd, opcode, hit_data);
1382 break;
1383 case R_METAG_TLS_GD:
1384 case R_METAG_TLS_LDM:
1385 opcode = bfd_get_32 (input_bfd, hit_data);
1386
1387 if ((bfd_signed_vma)relocation < 0)
1388 {
1389 /* sign extend immediate */
1390 if ((opcode & 0xf2000001) == 0x02000000)
1391 {
1392 /* ADD De.e,Dx.r,#I16 */
1393 /* set SE bit */
1394 opcode |= (1 << 1);
1395 } else
1396 return bfd_reloc_overflow;
1397 }
1398
1399 bfd_put_32 (input_bfd, opcode, hit_data);
1400
1401 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1402 contents, rel->r_offset,
1403 relocation, rel->r_addend);
1404 break;
1405 default:
1406 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1407 contents, rel->r_offset,
1408 relocation, rel->r_addend);
1409 }
1410
1411 return r;
1412 }
1413
1414 /* This is defined because R_METAG_NONE != 0...
1415 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1416 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1417 rel, relend, howto, contents) \
1418 { \
1419 _bfd_clear_contents (howto, input_bfd, input_section, \
1420 contents + rel->r_offset); \
1421 \
1422 if (bfd_link_relocatable (info) \
1423 && (input_section->flags & SEC_DEBUGGING)) \
1424 { \
1425 /* Only remove relocations in debug sections since other \
1426 sections may require relocations. */ \
1427 Elf_Internal_Shdr *rel_hdr; \
1428 \
1429 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1430 \
1431 /* Avoid empty output section. */ \
1432 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1433 { \
1434 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1435 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1436 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1437 \
1438 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1439 \
1440 input_section->reloc_count--; \
1441 relend--; \
1442 rel--; \
1443 continue; \
1444 } \
1445 } \
1446 \
1447 rel->r_info = R_METAG_NONE; \
1448 rel->r_addend = 0; \
1449 continue; \
1450 }
1451
1452 /* Relocate a META ELF section.
1453
1454 The RELOCATE_SECTION function is called by the new ELF backend linker
1455 to handle the relocations for a section.
1456
1457 The relocs are always passed as Rela structures; if the section
1458 actually uses Rel structures, the r_addend field will always be
1459 zero.
1460
1461 This function is responsible for adjusting the section contents as
1462 necessary, and (if using Rela relocs and generating a relocatable
1463 output file) adjusting the reloc addend as necessary.
1464
1465 This function does not have to worry about setting the reloc
1466 address or the reloc symbol index.
1467
1468 LOCAL_SYMS is a pointer to the swapped in local symbols.
1469
1470 LOCAL_SECTIONS is an array giving the section in the input file
1471 corresponding to the st_shndx field of each local symbol.
1472
1473 The global hash table entry for the global symbols can be found
1474 via elf_sym_hashes (input_bfd).
1475
1476 When generating relocatable output, this function must handle
1477 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1478 going to be the section symbol corresponding to the output
1479 section, which means that the addend must be adjusted
1480 accordingly. */
1481
1482 static bfd_boolean
1483 elf_metag_relocate_section (bfd *output_bfd,
1484 struct bfd_link_info *info,
1485 bfd *input_bfd,
1486 asection *input_section,
1487 bfd_byte *contents,
1488 Elf_Internal_Rela *relocs,
1489 Elf_Internal_Sym *local_syms,
1490 asection **local_sections)
1491 {
1492 bfd_vma *local_got_offsets;
1493 Elf_Internal_Shdr *symtab_hdr;
1494 struct elf_link_hash_entry **eh_syms;
1495 struct elf_metag_link_hash_table *htab;
1496 Elf_Internal_Rela *rel;
1497 Elf_Internal_Rela *relend;
1498 asection *sreloc;
1499
1500 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1501 eh_syms = elf_sym_hashes (input_bfd);
1502 relend = relocs + input_section->reloc_count;
1503
1504 htab = metag_link_hash_table (info);
1505 local_got_offsets = elf_local_got_offsets (input_bfd);
1506
1507 sreloc = NULL;
1508
1509 for (rel = relocs; rel < relend; rel ++)
1510 {
1511 reloc_howto_type *howto;
1512 unsigned long r_symndx;
1513 Elf_Internal_Sym *sym;
1514 asection *sec;
1515 struct elf_metag_link_hash_entry *hh;
1516 bfd_vma relocation;
1517 bfd_reloc_status_type r;
1518 const char *name;
1519 int r_type;
1520
1521 r_type = ELF32_R_TYPE (rel->r_info);
1522
1523 if (r_type == R_METAG_GNU_VTINHERIT
1524 || r_type == R_METAG_GNU_VTENTRY
1525 || r_type == R_METAG_NONE)
1526 continue;
1527
1528 r_symndx = ELF32_R_SYM (rel->r_info);
1529
1530 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1531 hh = NULL;
1532 sym = NULL;
1533 sec = NULL;
1534
1535 if (r_symndx < symtab_hdr->sh_info)
1536 {
1537 sym = local_syms + r_symndx;
1538 sec = local_sections [r_symndx];
1539 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1540
1541 name = bfd_elf_string_from_elf_section
1542 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1543 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1544 }
1545 else
1546 {
1547 struct elf_link_hash_entry *eh;
1548 bfd_boolean unresolved_reloc, warned, ignored;
1549
1550 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1551 r_symndx, symtab_hdr, eh_syms,
1552 eh, sec, relocation,
1553 unresolved_reloc, warned, ignored);
1554
1555 name = eh->root.root.string;
1556 hh = (struct elf_metag_link_hash_entry *) eh;
1557 }
1558
1559 if (sec != NULL && discarded_section (sec))
1560 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1561 rel, relend, howto, contents);
1562
1563 if (bfd_link_relocatable (info))
1564 continue;
1565
1566 switch (r_type)
1567 {
1568 case R_METAG_ADDR32:
1569 case R_METAG_RELBRANCH:
1570 if ((input_section->flags & SEC_ALLOC) == 0)
1571 break;
1572
1573 if ((bfd_link_pic (info)
1574 && r_symndx != STN_UNDEF
1575 && (input_section->flags & SEC_ALLOC) != 0
1576 && (r_type != R_METAG_RELBRANCH
1577 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1578 || (!bfd_link_pic (info)
1579 && hh != NULL
1580 && hh->eh.dynindx != -1
1581 && !hh->eh.non_got_ref
1582 && ((hh->eh.def_dynamic
1583 && !hh->eh.def_regular)
1584 || hh->eh.root.type == bfd_link_hash_undefweak
1585 || hh->eh.root.type == bfd_link_hash_undefined)))
1586 {
1587 Elf_Internal_Rela outrel;
1588 bfd_boolean skip, relocate;
1589 bfd_byte *loc;
1590
1591 /* When generating a shared object, these relocations
1592 are copied into the output file to be resolved at run
1593 time. */
1594
1595 sreloc = elf_section_data (input_section)->sreloc;
1596 BFD_ASSERT (sreloc != NULL);
1597
1598 skip = FALSE;
1599 relocate = FALSE;
1600
1601 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1602 info,
1603 input_section,
1604 rel->r_offset);
1605 if (outrel.r_offset == (bfd_vma) -1)
1606 skip = TRUE;
1607 else if (outrel.r_offset == (bfd_vma) -2)
1608 skip = TRUE, relocate = TRUE;
1609 outrel.r_offset += (input_section->output_section->vma
1610 + input_section->output_offset);
1611
1612 if (skip)
1613 {
1614 memset (&outrel, 0, sizeof outrel);
1615 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1616 }
1617 else if (r_type == R_METAG_RELBRANCH)
1618 {
1619 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1620 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1621 outrel.r_addend = rel->r_addend;
1622 }
1623 else
1624 {
1625 /* h->dynindx may be -1 if this symbol was marked to
1626 become local. */
1627 if (hh == NULL
1628 || ((info->symbolic || hh->eh.dynindx == -1)
1629 && hh->eh.def_regular))
1630 {
1631 relocate = TRUE;
1632 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1633 outrel.r_addend = relocation + rel->r_addend;
1634 }
1635 else
1636 {
1637 BFD_ASSERT (hh->eh.dynindx != -1);
1638 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1639 outrel.r_addend = rel->r_addend;
1640 }
1641 }
1642
1643 loc = sreloc->contents;
1644 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1645 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1646 ++sreloc->reloc_count;
1647
1648 /* If this reloc is against an external symbol, we do
1649 not want to fiddle with the addend. Otherwise, we
1650 need to include the symbol value so that it becomes
1651 an addend for the dynamic reloc. */
1652 if (! relocate)
1653 continue;
1654 }
1655 break;
1656
1657 case R_METAG_RELBRANCH_PLT:
1658 /* Relocation is to the entry for this symbol in the
1659 procedure linkage table. */
1660
1661 if (hh == NULL)
1662 break;
1663
1664 if (hh->eh.forced_local)
1665 break;
1666
1667 if (hh->eh.plt.offset == (bfd_vma) -1 ||
1668 htab->splt == NULL)
1669 {
1670 /* We didn't make a PLT entry for this symbol. This
1671 happens when statically linking PIC code, or when
1672 using -Bsymbolic. */
1673 break;
1674 }
1675
1676 relocation = (htab->splt->output_section->vma
1677 + htab->splt->output_offset
1678 + hh->eh.plt.offset);
1679 break;
1680 case R_METAG_HI16_GOTPC:
1681 case R_METAG_LO16_GOTPC:
1682 BFD_ASSERT (htab->sgot != NULL);
1683
1684 relocation = (htab->sgot->output_section->vma +
1685 htab->sgot->output_offset);
1686 relocation += GOT_REG_OFFSET;
1687 relocation -= (input_section->output_section->vma
1688 + input_section->output_offset
1689 + rel->r_offset);
1690 break;
1691 case R_METAG_HI16_GOTOFF:
1692 case R_METAG_LO16_GOTOFF:
1693 case R_METAG_GETSET_GOTOFF:
1694 BFD_ASSERT (htab->sgot != NULL);
1695
1696 relocation -= (htab->sgot->output_section->vma +
1697 htab->sgot->output_offset);
1698 relocation -= GOT_REG_OFFSET;
1699 break;
1700 case R_METAG_GETSET_GOT:
1701 {
1702 bfd_vma off;
1703 bfd_boolean do_got = 0;
1704
1705 /* Relocation is to the entry for this symbol in the
1706 global offset table. */
1707 if (hh != NULL)
1708 {
1709 bfd_boolean dyn;
1710
1711 off = hh->eh.got.offset;
1712 dyn = htab->etab.dynamic_sections_created;
1713 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1714 bfd_link_pic (info),
1715 &hh->eh))
1716 {
1717 /* If we aren't going to call finish_dynamic_symbol,
1718 then we need to handle initialisation of the .got
1719 entry and create needed relocs here. Since the
1720 offset must always be a multiple of 4, we use the
1721 least significant bit to record whether we have
1722 initialised it already. */
1723 if ((off & 1) != 0)
1724 off &= ~1;
1725 else
1726 {
1727 hh->eh.got.offset |= 1;
1728 do_got = 1;
1729 }
1730 }
1731 }
1732 else
1733 {
1734 /* Local symbol case. */
1735 if (local_got_offsets == NULL)
1736 abort ();
1737
1738 off = local_got_offsets[r_symndx];
1739
1740 /* The offset must always be a multiple of 4. We use
1741 the least significant bit to record whether we have
1742 already generated the necessary reloc. */
1743 if ((off & 1) != 0)
1744 off &= ~1;
1745 else
1746 {
1747 local_got_offsets[r_symndx] |= 1;
1748 do_got = 1;
1749 }
1750 }
1751
1752 if (do_got)
1753 {
1754 if (bfd_link_pic (info))
1755 {
1756 /* Output a dynamic relocation for this GOT entry.
1757 In this case it is relative to the base of the
1758 object because the symbol index is zero. */
1759 Elf_Internal_Rela outrel;
1760 bfd_byte *loc;
1761 asection *s = htab->srelgot;
1762
1763 outrel.r_offset = (off
1764 + htab->sgot->output_offset
1765 + htab->sgot->output_section->vma);
1766 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1767 outrel.r_addend = relocation;
1768 loc = s->contents;
1769 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1770 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1771 }
1772 else
1773 bfd_put_32 (output_bfd, relocation,
1774 htab->sgot->contents + off);
1775 }
1776
1777 if (off >= (bfd_vma) -2)
1778 abort ();
1779
1780 relocation = off - GOT_REG_OFFSET;
1781 }
1782 break;
1783 case R_METAG_TLS_GD:
1784 case R_METAG_TLS_IE:
1785 {
1786 /* XXXMJF There is room here for optimisations. For example
1787 converting from GD->IE, etc. */
1788 bfd_vma off;
1789 int indx;
1790 char tls_type;
1791
1792 if (htab->sgot == NULL)
1793 abort();
1794
1795 indx = 0;
1796 if (hh != NULL)
1797 {
1798 bfd_boolean dyn;
1799 dyn = htab->etab.dynamic_sections_created;
1800
1801 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1802 bfd_link_pic (info),
1803 &hh->eh)
1804 && (!bfd_link_pic (info)
1805 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1806 {
1807 indx = hh->eh.dynindx;
1808 }
1809 off = hh->eh.got.offset;
1810 tls_type = hh->tls_type;
1811 }
1812 else
1813 {
1814 /* Local symbol case. */
1815 if (local_got_offsets == NULL)
1816 abort ();
1817
1818 off = local_got_offsets[r_symndx];
1819 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1820 }
1821
1822 if (tls_type == GOT_UNKNOWN)
1823 abort();
1824
1825 if ((off & 1) != 0)
1826 off &= ~1;
1827 else
1828 {
1829 bfd_boolean need_relocs = FALSE;
1830 Elf_Internal_Rela outrel;
1831 bfd_byte *loc = NULL;
1832 int cur_off = off;
1833
1834 /* The GOT entries have not been initialized yet. Do it
1835 now, and emit any relocations. If both an IE GOT and a
1836 GD GOT are necessary, we emit the GD first. */
1837
1838 if ((bfd_link_pic (info) || indx != 0)
1839 && (hh == NULL
1840 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1841 || hh->eh.root.type != bfd_link_hash_undefweak))
1842 {
1843 need_relocs = TRUE;
1844 loc = htab->srelgot->contents;
1845 /* FIXME (CAO): Should this be reloc_count++ ? */
1846 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
1847 }
1848
1849 if (tls_type & GOT_TLS_GD)
1850 {
1851 if (need_relocs)
1852 {
1853 outrel.r_offset = (cur_off
1854 + htab->sgot->output_section->vma
1855 + htab->sgot->output_offset);
1856 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1857 outrel.r_addend = 0;
1858 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
1859
1860 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1861 htab->srelgot->reloc_count++;
1862 loc += sizeof (Elf32_External_Rela);
1863
1864 if (indx == 0)
1865 bfd_put_32 (output_bfd, 0,
1866 htab->sgot->contents + cur_off + 4);
1867 else
1868 {
1869 bfd_put_32 (output_bfd, 0,
1870 htab->sgot->contents + cur_off + 4);
1871 outrel.r_info = ELF32_R_INFO (indx,
1872 R_METAG_TLS_DTPOFF);
1873 outrel.r_offset += 4;
1874 bfd_elf32_swap_reloca_out (output_bfd,
1875 &outrel, loc);
1876 htab->srelgot->reloc_count++;
1877 loc += sizeof (Elf32_External_Rela);
1878 }
1879 }
1880 else
1881 {
1882 /* We don't support changing the TLS model. */
1883 abort ();
1884 }
1885
1886 cur_off += 8;
1887 }
1888
1889 if (tls_type & GOT_TLS_IE)
1890 {
1891 if (need_relocs)
1892 {
1893 outrel.r_offset = (cur_off
1894 + htab->sgot->output_section->vma
1895 + htab->sgot->output_offset);
1896 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1897
1898 if (indx == 0)
1899 outrel.r_addend = relocation - dtpoff_base (info);
1900 else
1901 outrel.r_addend = 0;
1902
1903 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1904 htab->srelgot->reloc_count++;
1905 loc += sizeof (Elf32_External_Rela);
1906 }
1907 else
1908 bfd_put_32 (output_bfd, tpoff (info, relocation),
1909 htab->sgot->contents + cur_off);
1910
1911 cur_off += 4;
1912 }
1913
1914 if (hh != NULL)
1915 hh->eh.got.offset |= 1;
1916 else
1917 local_got_offsets[r_symndx] |= 1;
1918 }
1919
1920 /* Add the base of the GOT to the relocation value. */
1921 relocation = off - GOT_REG_OFFSET;
1922
1923 break;
1924 }
1925
1926 case R_METAG_TLS_IENONPIC_HI16:
1927 case R_METAG_TLS_IENONPIC_LO16:
1928 case R_METAG_TLS_LE_HI16:
1929 case R_METAG_TLS_LE_LO16:
1930 if (bfd_link_pic (info))
1931 {
1932 _bfd_error_handler
1933 /* xgettext:c-format */
1934 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1935 input_bfd, input_section,
1936 (long) rel->r_offset, howto->name);
1937 return FALSE;
1938 }
1939 else
1940 relocation = tpoff (info, relocation);
1941 break;
1942 case R_METAG_TLS_LDO_HI16:
1943 case R_METAG_TLS_LDO_LO16:
1944 if (! bfd_link_pic (info))
1945 relocation = tpoff (info, relocation);
1946 else
1947 relocation -= dtpoff_base (info);
1948 break;
1949 case R_METAG_TLS_LDM:
1950 {
1951 bfd_vma off;
1952
1953 if (htab->sgot == NULL)
1954 abort();
1955 off = htab->tls_ldm_got.offset;
1956 if (off & 1)
1957 off &= ~1;
1958 else
1959 {
1960 Elf_Internal_Rela outrel;
1961 bfd_byte *loc;
1962
1963 outrel.r_offset = (off
1964 + htab->sgot->output_section->vma
1965 + htab->sgot->output_offset);
1966
1967 outrel.r_addend = 0;
1968 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1969 loc = htab->srelgot->contents;
1970 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1971 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1972 htab->tls_ldm_got.offset |= 1;
1973 }
1974
1975 relocation = off - GOT_REG_OFFSET;
1976 break;
1977 }
1978 default:
1979 break;
1980 }
1981
1982 r = metag_final_link_relocate (howto, input_bfd, input_section,
1983 contents, rel, relocation, hh, htab,
1984 sec);
1985
1986 if (r != bfd_reloc_ok)
1987 {
1988 const char * msg = (const char *) NULL;
1989
1990 switch (r)
1991 {
1992 case bfd_reloc_overflow:
1993 (*info->callbacks->reloc_overflow)
1994 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1995 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1996 break;
1997
1998 case bfd_reloc_undefined:
1999 (*info->callbacks->undefined_symbol)
2000 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
2001 break;
2002
2003 case bfd_reloc_outofrange:
2004 msg = _("internal error: out of range error");
2005 break;
2006
2007 case bfd_reloc_notsupported:
2008 msg = _("internal error: unsupported relocation error");
2009 break;
2010
2011 case bfd_reloc_dangerous:
2012 msg = _("internal error: dangerous relocation");
2013 break;
2014
2015 default:
2016 msg = _("internal error: unknown error");
2017 break;
2018 }
2019
2020 if (msg)
2021 (*info->callbacks->warning) (info, msg, name, input_bfd,
2022 input_section, rel->r_offset);
2023 }
2024 }
2025
2026 return TRUE;
2027 }
2028
2029 /* Create the .plt and .got sections, and set up our hash table
2030 short-cuts to various dynamic sections. */
2031
2032 static bfd_boolean
2033 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2034 {
2035 struct elf_metag_link_hash_table *htab;
2036 struct elf_link_hash_entry *eh;
2037 struct bfd_link_hash_entry *bh;
2038 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2039
2040 /* Don't try to create the .plt and .got twice. */
2041 htab = metag_link_hash_table (info);
2042 if (htab->splt != NULL)
2043 return TRUE;
2044
2045 /* Call the generic code to do most of the work. */
2046 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2047 return FALSE;
2048
2049 htab->sgot = bfd_get_linker_section (abfd, ".got");
2050 if (! htab->sgot)
2051 return FALSE;
2052
2053 htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt",
2054 (SEC_ALLOC | SEC_LOAD |
2055 SEC_HAS_CONTENTS |
2056 SEC_IN_MEMORY |
2057 SEC_LINKER_CREATED));
2058 if (htab->sgotplt == NULL
2059 || !bfd_set_section_alignment (abfd, htab->sgotplt, 2))
2060 return FALSE;
2061
2062 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2063 section. We don't do this in the linker script because we don't want
2064 to define the symbol if we are not creating a global offset table. */
2065 bh = NULL;
2066 if (!(_bfd_generic_link_add_one_symbol
2067 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot,
2068 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2069 return FALSE;
2070 eh = (struct elf_link_hash_entry *) bh;
2071 eh->def_regular = 1;
2072 eh->type = STT_OBJECT;
2073 eh->other = STV_HIDDEN;
2074
2075 if (! bfd_link_executable (info)
2076 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2077 return FALSE;
2078
2079 elf_hash_table (info)->hgot = eh;
2080
2081 htab->splt = bfd_get_linker_section (abfd, ".plt");
2082 htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt");
2083
2084 htab->srelgot = bfd_get_linker_section (abfd, ".rela.got");
2085
2086 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
2087 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
2088
2089 return TRUE;
2090 }
2091
2092 /* Look through the relocs for a section during the first phase, and
2093 calculate needed space in the global offset table, procedure linkage
2094 table, and dynamic reloc sections. At this point we haven't
2095 necessarily read all the input files. */
2096
2097 static bfd_boolean
2098 elf_metag_check_relocs (bfd *abfd,
2099 struct bfd_link_info *info,
2100 asection *sec,
2101 const Elf_Internal_Rela *relocs)
2102 {
2103 Elf_Internal_Shdr *symtab_hdr;
2104 struct elf_link_hash_entry **eh_syms;
2105 const Elf_Internal_Rela *rel;
2106 const Elf_Internal_Rela *rel_end;
2107 struct elf_metag_link_hash_table *htab;
2108 asection *sreloc;
2109 bfd *dynobj;
2110 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2111
2112 if (bfd_link_relocatable (info))
2113 return TRUE;
2114
2115 htab = metag_link_hash_table (info);
2116 dynobj = htab->etab.dynobj;
2117 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2118 eh_syms = elf_sym_hashes (abfd);
2119 sreloc = NULL;
2120
2121 if (htab == NULL)
2122 return FALSE;
2123
2124 rel_end = relocs + sec->reloc_count;
2125 for (rel = relocs; rel < rel_end; rel++)
2126 {
2127 int r_type;
2128 struct elf_metag_link_hash_entry *hh;
2129 Elf_Internal_Sym *isym;
2130 unsigned long r_symndx;
2131
2132 r_symndx = ELF32_R_SYM (rel->r_info);
2133 r_type = ELF32_R_TYPE (rel->r_info);
2134 if (r_symndx < symtab_hdr->sh_info)
2135 {
2136 /* A local symbol. */
2137 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2138 abfd, r_symndx);
2139 if (isym == NULL)
2140 return FALSE;
2141
2142 hh = NULL;
2143 }
2144 else
2145 {
2146 isym = NULL;
2147
2148 hh = (struct elf_metag_link_hash_entry *)
2149 eh_syms[r_symndx - symtab_hdr->sh_info];
2150 while (hh->eh.root.type == bfd_link_hash_indirect
2151 || hh->eh.root.type == bfd_link_hash_warning)
2152 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2153
2154 /* PR15323, ref flags aren't set for references in the same
2155 object. */
2156 hh->eh.root.non_ir_ref = 1;
2157 }
2158
2159 /* Some relocs require a global offset table. */
2160 if (htab->sgot == NULL)
2161 {
2162 switch (r_type)
2163 {
2164 case R_METAG_TLS_GD:
2165 case R_METAG_TLS_LDM:
2166 case R_METAG_TLS_IE:
2167 if (bfd_link_pic (info))
2168 info->flags |= DF_STATIC_TLS;
2169 /* Fall through. */
2170
2171 case R_METAG_HI16_GOTOFF:
2172 case R_METAG_LO16_GOTOFF:
2173 case R_METAG_GETSET_GOTOFF:
2174 case R_METAG_GETSET_GOT:
2175 case R_METAG_HI16_GOTPC:
2176 case R_METAG_LO16_GOTPC:
2177 if (dynobj == NULL)
2178 htab->etab.dynobj = dynobj = abfd;
2179 if (!elf_metag_create_dynamic_sections (dynobj, info))
2180 return FALSE;
2181 break;
2182
2183 default:
2184 break;
2185 }
2186 }
2187
2188 switch (r_type)
2189 {
2190 case R_METAG_TLS_IE:
2191 case R_METAG_TLS_GD:
2192 case R_METAG_GETSET_GOT:
2193 switch (r_type)
2194 {
2195 default:
2196 tls_type = GOT_NORMAL;
2197 break;
2198 case R_METAG_TLS_IE:
2199 tls_type = GOT_TLS_IE;
2200 break;
2201 case R_METAG_TLS_GD:
2202 tls_type = GOT_TLS_GD;
2203 break;
2204 }
2205
2206 if (hh != NULL)
2207 {
2208 hh->eh.got.refcount += 1;
2209 old_tls_type = hh->tls_type;
2210 }
2211 else
2212 {
2213 bfd_signed_vma *local_got_refcounts;
2214
2215 /* This is a global offset table entry for a local
2216 symbol. */
2217 local_got_refcounts = elf_local_got_refcounts (abfd);
2218 if (local_got_refcounts == NULL)
2219 {
2220 bfd_size_type size;
2221
2222 size = symtab_hdr->sh_info;
2223 size *= sizeof (bfd_signed_vma);
2224 /* Add in space to store the local GOT TLS types. */
2225 size += symtab_hdr->sh_info;
2226 local_got_refcounts = ((bfd_signed_vma *)
2227 bfd_zalloc (abfd, size));
2228 if (local_got_refcounts == NULL)
2229 return FALSE;
2230 elf_local_got_refcounts (abfd) = local_got_refcounts;
2231 memset (metag_elf_local_got_tls_type (abfd),
2232 GOT_UNKNOWN, symtab_hdr->sh_info);
2233 }
2234 local_got_refcounts[r_symndx] += 1;
2235 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2236 }
2237
2238 if (old_tls_type != tls_type)
2239 {
2240 if (hh != NULL)
2241 {
2242 hh->tls_type = tls_type;
2243 }
2244 else
2245 {
2246 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2247 }
2248 }
2249
2250 break;
2251
2252 case R_METAG_TLS_LDM:
2253 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2254 break;
2255
2256 case R_METAG_RELBRANCH_PLT:
2257 /* This symbol requires a procedure linkage table entry. We
2258 actually build the entry in adjust_dynamic_symbol,
2259 because this might be a case of linking PIC code without
2260 linking in any dynamic objects, in which case we don't
2261 need to generate a procedure linkage table after all. */
2262
2263 /* If this is a local symbol, we resolve it directly without
2264 creating a procedure linkage table entry. */
2265 if (hh == NULL)
2266 continue;
2267
2268 if (hh->eh.forced_local)
2269 break;
2270
2271 hh->eh.needs_plt = 1;
2272 hh->eh.plt.refcount += 1;
2273 break;
2274
2275 case R_METAG_HIADDR16:
2276 case R_METAG_LOADDR16:
2277 /* Let's help debug shared library creation. These relocs
2278 cannot be used in shared libs. Don't error out for
2279 sections we don't care about, such as debug sections or
2280 non-constant sections. */
2281 if (bfd_link_pic (info)
2282 && (sec->flags & SEC_ALLOC) != 0
2283 && (sec->flags & SEC_READONLY) != 0)
2284 {
2285 const char *name;
2286
2287 if (hh)
2288 name = hh->eh.root.root.string;
2289 else
2290 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2291 _bfd_error_handler
2292 /* xgettext:c-format */
2293 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2294 abfd, elf_metag_howto_table[r_type].name, name);
2295 bfd_set_error (bfd_error_bad_value);
2296 return FALSE;
2297 }
2298
2299 /* Fall through. */
2300 case R_METAG_ADDR32:
2301 case R_METAG_RELBRANCH:
2302 case R_METAG_GETSETOFF:
2303 if (hh != NULL && !bfd_link_pic (info))
2304 {
2305 hh->eh.non_got_ref = 1;
2306 hh->eh.plt.refcount += 1;
2307 }
2308
2309 /* If we are creating a shared library, and this is a reloc
2310 against a global symbol, or a non PC relative reloc
2311 against a local symbol, then we need to copy the reloc
2312 into the shared library. However, if we are linking with
2313 -Bsymbolic, we do not need to copy a reloc against a
2314 global symbol which is defined in an object we are
2315 including in the link (i.e., DEF_REGULAR is set). At
2316 this point we have not seen all the input files, so it is
2317 possible that DEF_REGULAR is not set now but will be set
2318 later (it is never cleared). We account for that
2319 possibility below by storing information in the
2320 dyn_relocs field of the hash table entry. A similar
2321 situation occurs when creating shared libraries and symbol
2322 visibility changes render the symbol local.
2323
2324 If on the other hand, we are creating an executable, we
2325 may need to keep relocations for symbols satisfied by a
2326 dynamic library if we manage to avoid copy relocs for the
2327 symbol. */
2328 if ((bfd_link_pic (info)
2329 && (sec->flags & SEC_ALLOC) != 0
2330 && (r_type != R_METAG_RELBRANCH
2331 || (hh != NULL
2332 && (! info->symbolic
2333 || hh->eh.root.type == bfd_link_hash_defweak
2334 || !hh->eh.def_regular))))
2335 || (!bfd_link_pic (info)
2336 && (sec->flags & SEC_ALLOC) != 0
2337 && hh != NULL
2338 && (hh->eh.root.type == bfd_link_hash_defweak
2339 || !hh->eh.def_regular)))
2340 {
2341 struct elf_metag_dyn_reloc_entry *hdh_p;
2342 struct elf_metag_dyn_reloc_entry **hdh_head;
2343
2344 if (dynobj == NULL)
2345 htab->etab.dynobj = dynobj = abfd;
2346
2347 /* When creating a shared object, we must copy these
2348 relocs into the output file. We create a reloc
2349 section in dynobj and make room for the reloc. */
2350 if (sreloc == NULL)
2351 {
2352 sreloc = _bfd_elf_make_dynamic_reloc_section
2353 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2354
2355 if (sreloc == NULL)
2356 {
2357 bfd_set_error (bfd_error_bad_value);
2358 return FALSE;
2359 }
2360
2361 elf_section_data (sec)->sreloc = sreloc;
2362 }
2363
2364 /* If this is a global symbol, we count the number of
2365 relocations we need for this symbol. */
2366 if (hh != NULL)
2367 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2368 else
2369 {
2370 /* Track dynamic relocs needed for local syms too. */
2371 asection *sr;
2372 void *vpp;
2373
2374 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2375 if (sr == NULL)
2376 sr = sec;
2377
2378 vpp = &elf_section_data (sr)->local_dynrel;
2379 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2380 }
2381
2382 hdh_p = *hdh_head;
2383 if (hdh_p == NULL || hdh_p->sec != sec)
2384 {
2385 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2386 bfd_alloc (dynobj, sizeof *hdh_p));
2387 if (hdh_p == NULL)
2388 return FALSE;
2389 hdh_p->hdh_next = *hdh_head;
2390 *hdh_head = hdh_p;
2391 hdh_p->sec = sec;
2392 hdh_p->count = 0;
2393 hdh_p->relative_count = 0;
2394 }
2395
2396 hdh_p->count += 1;
2397 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2398 hdh_p->relative_count += 1;
2399 }
2400 break;
2401
2402 /* This relocation describes the C++ object vtable hierarchy.
2403 Reconstruct it for later use during GC. */
2404 case R_METAG_GNU_VTINHERIT:
2405 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2406 rel->r_offset))
2407 return FALSE;
2408 break;
2409
2410 /* This relocation describes which C++ vtable entries are actually
2411 used. Record for later use during GC. */
2412 case R_METAG_GNU_VTENTRY:
2413 BFD_ASSERT (hh != NULL);
2414 if (hh != NULL
2415 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2416 return FALSE;
2417 break;
2418 }
2419 }
2420
2421 return TRUE;
2422 }
2423
2424 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2425
2426 static void
2427 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2428 struct elf_link_hash_entry *eh_dir,
2429 struct elf_link_hash_entry *eh_ind)
2430 {
2431 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2432
2433 hh_dir = metag_elf_hash_entry (eh_dir);
2434 hh_ind = metag_elf_hash_entry (eh_ind);
2435
2436 if (hh_ind->dyn_relocs != NULL)
2437 {
2438 if (hh_dir->dyn_relocs != NULL)
2439 {
2440 struct elf_metag_dyn_reloc_entry **hdh_pp;
2441 struct elf_metag_dyn_reloc_entry *hdh_p;
2442
2443 if (eh_ind->root.type == bfd_link_hash_indirect)
2444 abort ();
2445
2446 /* Add reloc counts against the weak sym to the strong sym
2447 list. Merge any entries against the same section. */
2448 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2449 {
2450 struct elf_metag_dyn_reloc_entry *hdh_q;
2451
2452 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2453 hdh_q = hdh_q->hdh_next)
2454 if (hdh_q->sec == hdh_p->sec)
2455 {
2456 hdh_q->relative_count += hdh_p->relative_count;
2457 hdh_q->count += hdh_p->count;
2458 *hdh_pp = hdh_p->hdh_next;
2459 break;
2460 }
2461 if (hdh_q == NULL)
2462 hdh_pp = &hdh_p->hdh_next;
2463 }
2464 *hdh_pp = hh_dir->dyn_relocs;
2465 }
2466
2467 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2468 hh_ind->dyn_relocs = NULL;
2469 }
2470
2471 if (eh_ind->root.type == bfd_link_hash_indirect
2472 && eh_dir->got.refcount <= 0)
2473 {
2474 hh_dir->tls_type = hh_ind->tls_type;
2475 hh_ind->tls_type = GOT_UNKNOWN;
2476 }
2477
2478 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2479 }
2480
2481 /* Adjust a symbol defined by a dynamic object and referenced by a
2482 regular object. The current definition is in some section of the
2483 dynamic object, but we're not including those sections. We have to
2484 change the definition to something the rest of the link can
2485 understand. */
2486
2487 static bfd_boolean
2488 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2489 struct elf_link_hash_entry *eh)
2490 {
2491 struct elf_metag_link_hash_table *htab;
2492 struct elf_metag_link_hash_entry *hh;
2493 struct elf_metag_dyn_reloc_entry *hdh_p;
2494 asection *s;
2495
2496 /* If this is a function, put it in the procedure linkage table. We
2497 will fill in the contents of the procedure linkage table later,
2498 when we know the address of the .got section. */
2499 if (eh->type == STT_FUNC
2500 || eh->needs_plt)
2501 {
2502 if (eh->plt.refcount <= 0
2503 || SYMBOL_CALLS_LOCAL (info, eh)
2504 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2505 && eh->root.type == bfd_link_hash_undefweak))
2506 {
2507 /* This case can occur if we saw a PLT reloc in an input
2508 file, but the symbol was never referred to by a dynamic
2509 object. In such a case, we don't actually need to build
2510 a procedure linkage table, and we can just do a PCREL
2511 reloc instead. */
2512 eh->plt.offset = (bfd_vma) -1;
2513 eh->needs_plt = 0;
2514 }
2515
2516 return TRUE;
2517 }
2518 else
2519 eh->plt.offset = (bfd_vma) -1;
2520
2521 /* If this is a weak symbol, and there is a real definition, the
2522 processor independent code will have arranged for us to see the
2523 real definition first, and we can just use the same value. */
2524 if (eh->u.weakdef != NULL)
2525 {
2526 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2527 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2528 abort ();
2529 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2530 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2531 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2532 return TRUE;
2533 }
2534
2535 /* This is a reference to a symbol defined by a dynamic object which
2536 is not a function. */
2537
2538 /* If we are creating a shared library, we must presume that the
2539 only references to the symbol are via the global offset table.
2540 For such cases we need not do anything here; the relocations will
2541 be handled correctly by relocate_section. */
2542 if (bfd_link_pic (info))
2543 return TRUE;
2544
2545 /* If there are no references to this symbol that do not use the
2546 GOT, we don't need to generate a copy reloc. */
2547 if (!eh->non_got_ref)
2548 return TRUE;
2549
2550 /* If -z nocopyreloc was given, we won't generate them either. */
2551 if (info->nocopyreloc)
2552 {
2553 eh->non_got_ref = 0;
2554 return TRUE;
2555 }
2556
2557 hh = (struct elf_metag_link_hash_entry *) eh;
2558 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2559 {
2560 s = hdh_p->sec->output_section;
2561 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2562 break;
2563 }
2564
2565 /* If we didn't find any dynamic relocs in read-only sections, then
2566 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2567 if (hdh_p == NULL)
2568 {
2569 eh->non_got_ref = 0;
2570 return TRUE;
2571 }
2572
2573 /* We must allocate the symbol in our .dynbss section, which will
2574 become part of the .bss section of the executable. There will be
2575 an entry for this symbol in the .dynsym section. The dynamic
2576 object will contain position independent code, so all references
2577 from the dynamic object to this symbol will go through the global
2578 offset table. The dynamic linker will use the .dynsym entry to
2579 determine the address it must put in the global offset table, so
2580 both the dynamic object and the regular object will refer to the
2581 same memory location for the variable. */
2582
2583 htab = metag_link_hash_table (info);
2584
2585 /* We must generate a COPY reloc to tell the dynamic linker to
2586 copy the initial value out of the dynamic object and into the
2587 runtime process image. */
2588 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2589 {
2590 htab->srelbss->size += sizeof (Elf32_External_Rela);
2591 eh->needs_copy = 1;
2592 }
2593
2594 s = htab->sdynbss;
2595
2596 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
2597 }
2598
2599 /* Allocate space in .plt, .got and associated reloc sections for
2600 global syms. */
2601
2602 static bfd_boolean
2603 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2604 {
2605 struct bfd_link_info *info;
2606 struct elf_metag_link_hash_table *htab;
2607 struct elf_metag_link_hash_entry *hh;
2608 struct elf_metag_dyn_reloc_entry *hdh_p;
2609
2610 if (eh->root.type == bfd_link_hash_indirect)
2611 return TRUE;
2612
2613 if (eh->root.type == bfd_link_hash_warning)
2614 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2615
2616 info = inf;
2617 htab = metag_link_hash_table (info);
2618
2619 if (htab->etab.dynamic_sections_created
2620 && eh->plt.refcount > 0)
2621 {
2622 /* Make sure this symbol is output as a dynamic symbol.
2623 Undefined weak syms won't yet be marked as dynamic. */
2624 if (eh->dynindx == -1
2625 && !eh->forced_local)
2626 {
2627 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2628 return FALSE;
2629 }
2630
2631 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
2632 {
2633 asection *s = htab->splt;
2634
2635 /* If this is the first .plt entry, make room for the special
2636 first entry. */
2637 if (s->size == 0)
2638 s->size += PLT_ENTRY_SIZE;
2639
2640 eh->plt.offset = s->size;
2641
2642 /* If this symbol is not defined in a regular file, and we are
2643 not generating a shared library, then set the symbol to this
2644 location in the .plt. This is required to make function
2645 pointers compare as equal between the normal executable and
2646 the shared library. */
2647 if (! bfd_link_pic (info)
2648 && !eh->def_regular)
2649 {
2650 eh->root.u.def.section = s;
2651 eh->root.u.def.value = eh->plt.offset;
2652 }
2653
2654 /* Make room for this entry. */
2655 s->size += PLT_ENTRY_SIZE;
2656
2657 /* We also need to make an entry in the .got.plt section, which
2658 will be placed in the .got section by the linker script. */
2659 htab->sgotplt->size += 4;
2660
2661 /* We also need to make an entry in the .rel.plt section. */
2662 htab->srelplt->size += sizeof (Elf32_External_Rela);
2663 }
2664 else
2665 {
2666 eh->plt.offset = (bfd_vma) -1;
2667 eh->needs_plt = 0;
2668 }
2669 }
2670 else
2671 {
2672 eh->plt.offset = (bfd_vma) -1;
2673 eh->needs_plt = 0;
2674 }
2675
2676 if (eh->got.refcount > 0)
2677 {
2678 asection *s;
2679 bfd_boolean dyn;
2680 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2681
2682 /* Make sure this symbol is output as a dynamic symbol.
2683 Undefined weak syms won't yet be marked as dynamic. */
2684 if (eh->dynindx == -1
2685 && !eh->forced_local)
2686 {
2687 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2688 return FALSE;
2689 }
2690
2691 s = htab->sgot;
2692
2693 eh->got.offset = s->size;
2694 s->size += 4;
2695 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2696 if (tls_type == GOT_TLS_GD)
2697 s->size += 4;
2698 dyn = htab->etab.dynamic_sections_created;
2699 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2700 R_METAG_TLS_GD needs one if local symbol and two if global. */
2701 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2702 || (tls_type == GOT_TLS_IE && dyn))
2703 htab->srelgot->size += sizeof (Elf32_External_Rela);
2704 else if (tls_type == GOT_TLS_GD)
2705 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2706 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2707 bfd_link_pic (info),
2708 eh))
2709 htab->srelgot->size += sizeof (Elf32_External_Rela);
2710 }
2711 else
2712 eh->got.offset = (bfd_vma) -1;
2713
2714 hh = (struct elf_metag_link_hash_entry *) eh;
2715 if (hh->dyn_relocs == NULL)
2716 return TRUE;
2717
2718 /* If this is a -Bsymbolic shared link, then we need to discard all
2719 space allocated for dynamic pc-relative relocs against symbols
2720 defined in a regular object. For the normal shared case, discard
2721 space for relocs that have become local due to symbol visibility
2722 changes. */
2723 if (bfd_link_pic (info))
2724 {
2725 if (SYMBOL_CALLS_LOCAL (info, eh))
2726 {
2727 struct elf_metag_dyn_reloc_entry **hdh_pp;
2728
2729 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2730 {
2731 hdh_p->count -= hdh_p->relative_count;
2732 hdh_p->relative_count = 0;
2733 if (hdh_p->count == 0)
2734 *hdh_pp = hdh_p->hdh_next;
2735 else
2736 hdh_pp = &hdh_p->hdh_next;
2737 }
2738 }
2739
2740 /* Also discard relocs on undefined weak syms with non-default
2741 visibility. */
2742 if (hh->dyn_relocs != NULL
2743 && eh->root.type == bfd_link_hash_undefweak)
2744 {
2745 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2746 hh->dyn_relocs = NULL;
2747
2748 /* Make sure undefined weak symbols are output as a dynamic
2749 symbol in PIEs. */
2750 else if (eh->dynindx == -1
2751 && !eh->forced_local)
2752 {
2753 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2754 return FALSE;
2755 }
2756 }
2757 }
2758 else
2759 {
2760 /* For the non-shared case, discard space for relocs against
2761 symbols which turn out to need copy relocs or are not
2762 dynamic. */
2763 if (!eh->non_got_ref
2764 && ((eh->def_dynamic
2765 && !eh->def_regular)
2766 || (htab->etab.dynamic_sections_created
2767 && (eh->root.type == bfd_link_hash_undefweak
2768 || eh->root.type == bfd_link_hash_undefined))))
2769 {
2770 /* Make sure this symbol is output as a dynamic symbol.
2771 Undefined weak syms won't yet be marked as dynamic. */
2772 if (eh->dynindx == -1
2773 && !eh->forced_local)
2774 {
2775 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2776 return FALSE;
2777 }
2778
2779 /* If that succeeded, we know we'll be keeping all the
2780 relocs. */
2781 if (eh->dynindx != -1)
2782 goto keep;
2783 }
2784
2785 hh->dyn_relocs = NULL;
2786 return TRUE;
2787
2788 keep: ;
2789 }
2790
2791 /* Finally, allocate space. */
2792 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2793 {
2794 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2795 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2796 }
2797
2798 return TRUE;
2799 }
2800
2801 /* Find any dynamic relocs that apply to read-only sections. */
2802
2803 static bfd_boolean
2804 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2805 {
2806 struct elf_metag_link_hash_entry *hh;
2807 struct elf_metag_dyn_reloc_entry *hdh_p;
2808
2809 if (eh->root.type == bfd_link_hash_warning)
2810 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2811
2812 hh = (struct elf_metag_link_hash_entry *) eh;
2813 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2814 {
2815 asection *s = hdh_p->sec->output_section;
2816
2817 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2818 {
2819 struct bfd_link_info *info = inf;
2820
2821 info->flags |= DF_TEXTREL;
2822
2823 /* Not an error, just cut short the traversal. */
2824 return FALSE;
2825 }
2826 }
2827 return TRUE;
2828 }
2829
2830 /* Set the sizes of the dynamic sections. */
2831
2832 static bfd_boolean
2833 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2834 struct bfd_link_info *info)
2835 {
2836 struct elf_metag_link_hash_table *htab;
2837 bfd *dynobj;
2838 bfd *ibfd;
2839 asection *s;
2840 bfd_boolean relocs;
2841
2842 htab = metag_link_hash_table (info);
2843 dynobj = htab->etab.dynobj;
2844 if (dynobj == NULL)
2845 abort ();
2846
2847 if (htab->etab.dynamic_sections_created)
2848 {
2849 /* Set the contents of the .interp section to the interpreter. */
2850 if (bfd_link_executable (info) && !info->nointerp)
2851 {
2852 s = bfd_get_linker_section (dynobj, ".interp");
2853 if (s == NULL)
2854 abort ();
2855 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2856 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2857 }
2858 }
2859
2860 /* Set up .got offsets for local syms, and space for local dynamic
2861 relocs. */
2862 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2863 {
2864 bfd_signed_vma *local_got;
2865 bfd_signed_vma *end_local_got;
2866 bfd_size_type locsymcount;
2867 Elf_Internal_Shdr *symtab_hdr;
2868 asection *srel;
2869 char *local_tls_type;
2870
2871 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2872 continue;
2873
2874 for (s = ibfd->sections; s != NULL; s = s->next)
2875 {
2876 struct elf_metag_dyn_reloc_entry *hdh_p;
2877
2878 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2879 elf_section_data (s)->local_dynrel);
2880 hdh_p != NULL;
2881 hdh_p = hdh_p->hdh_next)
2882 {
2883 if (!bfd_is_abs_section (hdh_p->sec)
2884 && bfd_is_abs_section (hdh_p->sec->output_section))
2885 {
2886 /* Input section has been discarded, either because
2887 it is a copy of a linkonce section or due to
2888 linker script /DISCARD/, so we'll be discarding
2889 the relocs too. */
2890 }
2891 else if (hdh_p->count != 0)
2892 {
2893 srel = elf_section_data (hdh_p->sec)->sreloc;
2894 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2895 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2896 info->flags |= DF_TEXTREL;
2897 }
2898 }
2899 }
2900
2901 local_got = elf_local_got_refcounts (ibfd);
2902 if (!local_got)
2903 continue;
2904
2905 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2906 locsymcount = symtab_hdr->sh_info;
2907 end_local_got = local_got + locsymcount;
2908 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2909 s = htab->sgot;
2910 srel = htab->srelgot;
2911 for (; local_got < end_local_got; ++local_got)
2912 {
2913 if (*local_got > 0)
2914 {
2915 *local_got = s->size;
2916 s->size += GOT_ENTRY_SIZE;
2917 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2918 if (*local_tls_type == GOT_TLS_GD)
2919 s->size += 4;
2920 if (bfd_link_pic (info))
2921 srel->size += sizeof (Elf32_External_Rela);
2922 }
2923 else
2924 *local_got = (bfd_vma) -1;
2925 ++local_tls_type;
2926 }
2927 }
2928
2929 if (htab->tls_ldm_got.refcount > 0)
2930 {
2931 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2932 reloc. */
2933 htab->tls_ldm_got.offset = htab->sgot->size;
2934 htab->sgot->size += 8;
2935 htab->srelgot->size += sizeof (Elf32_External_Rela);
2936 }
2937 else
2938 htab->tls_ldm_got.offset = -1;
2939
2940 /* Allocate global sym .plt and .got entries, and space for global
2941 sym dynamic relocs. */
2942 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2943
2944 /* We now have determined the sizes of the various dynamic sections.
2945 Allocate memory for them. */
2946 relocs = FALSE;
2947 for (s = dynobj->sections; s != NULL; s = s->next)
2948 {
2949 bfd_boolean reloc_section = FALSE;
2950
2951 if ((s->flags & SEC_LINKER_CREATED) == 0)
2952 continue;
2953
2954 if (s == htab->splt
2955 || s == htab->sgot
2956 || s == htab->sgotplt
2957 || s == htab->sdynbss)
2958 {
2959 /* Strip this section if we don't need it; see the
2960 comment below. */
2961 }
2962 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2963 {
2964 if (s->size != 0 && s != htab->srelplt)
2965 relocs = TRUE;
2966
2967 /* We use the reloc_count field as a counter if we need
2968 to copy relocs into the output file. */
2969 s->reloc_count = 0;
2970 reloc_section = TRUE;
2971 }
2972 else
2973 {
2974 /* It's not one of our sections, so don't allocate space. */
2975 continue;
2976 }
2977
2978 if (s->size == 0)
2979 {
2980 /* If we don't need this section, strip it from the
2981 output file. This is mostly to handle .rela.bss and
2982 .rela.plt. We must create both sections in
2983 create_dynamic_sections, because they must be created
2984 before the linker maps input sections to output
2985 sections. The linker does that before
2986 adjust_dynamic_symbol is called, and it is that
2987 function which decides whether anything needs to go
2988 into these sections. */
2989 s->flags |= SEC_EXCLUDE;
2990 continue;
2991 }
2992
2993 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2994 continue;
2995
2996 /* Allocate memory for the section contents. */
2997 s->contents = bfd_zalloc (dynobj, s->size);
2998 if (s->contents == NULL)
2999 return FALSE;
3000 else if (reloc_section)
3001 {
3002 unsigned char *contents = s->contents;
3003 Elf32_External_Rela reloc;
3004
3005 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3006 memset(&reloc, 0, sizeof(Elf32_External_Rela));
3007 reloc.r_info[0] = R_METAG_NONE;
3008 for (; contents < (s->contents + s->size);
3009 contents += sizeof(Elf32_External_Rela))
3010 {
3011 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3012 }
3013 }
3014 }
3015
3016 if (htab->etab.dynamic_sections_created)
3017 {
3018 /* Add some entries to the .dynamic section. We fill in the
3019 values later, in elf_metag_finish_dynamic_sections, but we
3020 must add the entries now so that we get the correct size for
3021 the .dynamic section. The DT_DEBUG entry is filled in by the
3022 dynamic linker and used by the debugger. */
3023 #define add_dynamic_entry(TAG, VAL) \
3024 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3025
3026 if (!add_dynamic_entry (DT_PLTGOT, 0))
3027 return FALSE;
3028
3029 if (bfd_link_executable (info))
3030 {
3031 if (!add_dynamic_entry (DT_DEBUG, 0))
3032 return FALSE;
3033 }
3034
3035 if (htab->srelplt->size != 0)
3036 {
3037 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3038 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3039 || !add_dynamic_entry (DT_JMPREL, 0))
3040 return FALSE;
3041 }
3042
3043 if (relocs)
3044 {
3045 if (!add_dynamic_entry (DT_RELA, 0)
3046 || !add_dynamic_entry (DT_RELASZ, 0)
3047 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3048 return FALSE;
3049
3050 /* If any dynamic relocs apply to a read-only section,
3051 then we need a DT_TEXTREL entry. */
3052 if ((info->flags & DF_TEXTREL) == 0)
3053 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3054
3055 if ((info->flags & DF_TEXTREL) != 0)
3056 {
3057 if (!add_dynamic_entry (DT_TEXTREL, 0))
3058 return FALSE;
3059 }
3060 }
3061 }
3062 #undef add_dynamic_entry
3063
3064 return TRUE;
3065 }
3066
3067 /* Finish up dynamic symbol handling. We set the contents of various
3068 dynamic sections here. */
3069
3070 static bfd_boolean
3071 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3072 struct bfd_link_info *info,
3073 struct elf_link_hash_entry *eh,
3074 Elf_Internal_Sym *sym)
3075 {
3076 struct elf_metag_link_hash_table *htab;
3077 Elf_Internal_Rela rel;
3078 bfd_byte *loc;
3079
3080 htab = metag_link_hash_table (info);
3081
3082 if (eh->plt.offset != (bfd_vma) -1)
3083 {
3084 asection *splt;
3085 asection *sgot;
3086 asection *srela;
3087
3088 bfd_vma plt_index;
3089 bfd_vma got_offset;
3090 bfd_vma got_entry;
3091
3092 if (eh->plt.offset & 1)
3093 abort ();
3094
3095 BFD_ASSERT (eh->dynindx != -1);
3096
3097 splt = htab->splt;
3098 sgot = htab->sgotplt;
3099 srela = htab->srelplt;
3100 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3101
3102 /* Get the index in the procedure linkage table which
3103 corresponds to this symbol. This is the index of this symbol
3104 in all the symbols for which we are making plt entries. The
3105 first entry in the procedure linkage table is reserved. */
3106 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3107
3108 /* Get the offset into the .got.plt table of the entry that
3109 corresponds to this function. */
3110 got_offset = plt_index * GOT_ENTRY_SIZE;
3111
3112 BFD_ASSERT (got_offset < (1 << 16));
3113
3114 got_entry = sgot->output_section->vma
3115 + sgot->output_offset
3116 + got_offset;
3117
3118 BFD_ASSERT (plt_index < (1 << 16));
3119
3120 /* Fill in the entry in the procedure linkage table. */
3121 if (! bfd_link_pic (info))
3122 {
3123 bfd_put_32 (output_bfd,
3124 (plt_entry[0]
3125 | (((got_entry >> 16) & 0xffff) << 3)),
3126 splt->contents + eh->plt.offset);
3127 bfd_put_32 (output_bfd,
3128 (plt_entry[1]
3129 | ((got_entry & 0xffff) << 3)),
3130 splt->contents + eh->plt.offset + 4);
3131 bfd_put_32 (output_bfd, plt_entry[2],
3132 splt->contents + eh->plt.offset + 8);
3133 bfd_put_32 (output_bfd,
3134 (plt_entry[3] | (plt_index << 3)),
3135 splt->contents + eh->plt.offset + 12);
3136 bfd_put_32 (output_bfd,
3137 (plt_entry[4]
3138 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3139 splt->contents + eh->plt.offset + 16);
3140 }
3141 else
3142 {
3143 bfd_vma addr = got_entry - (splt->output_section->vma +
3144 splt->output_offset + eh->plt.offset);
3145
3146 bfd_put_32 (output_bfd,
3147 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3148 splt->contents + eh->plt.offset);
3149 bfd_put_32 (output_bfd,
3150 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3151 splt->contents + eh->plt.offset + 4);
3152 bfd_put_32 (output_bfd, plt_pic_entry[2],
3153 splt->contents + eh->plt.offset + 8);
3154 bfd_put_32 (output_bfd,
3155 (plt_pic_entry[3] | (plt_index << 3)),
3156 splt->contents + eh->plt.offset + 12);
3157 bfd_put_32 (output_bfd,
3158 (plt_pic_entry[4]
3159 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3160 splt->contents + eh->plt.offset + 16);
3161 }
3162
3163 /* Fill in the entry in the global offset table. */
3164 bfd_put_32 (output_bfd,
3165 (splt->output_section->vma
3166 + splt->output_offset
3167 + eh->plt.offset
3168 + 12), /* offset within PLT entry */
3169 sgot->contents + got_offset);
3170
3171 /* Fill in the entry in the .rela.plt section. */
3172 rel.r_offset = (sgot->output_section->vma
3173 + sgot->output_offset
3174 + got_offset);
3175 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3176 rel.r_addend = 0;
3177 loc = htab->srelplt->contents;
3178 loc += plt_index * sizeof(Elf32_External_Rela);
3179 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3180
3181 if (!eh->def_regular)
3182 {
3183 /* Mark the symbol as undefined, rather than as defined in
3184 the .plt section. Leave the value alone. */
3185 sym->st_shndx = SHN_UNDEF;
3186 }
3187 }
3188
3189 if (eh->got.offset != (bfd_vma) -1
3190 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3191 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3192 {
3193 /* This symbol has an entry in the global offset table. Set it
3194 up. */
3195
3196 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3197 + htab->sgot->output_offset
3198 + htab->sgot->output_section->vma);
3199
3200 /* If this is a -Bsymbolic link and the symbol is defined
3201 locally or was forced to be local because of a version file,
3202 we just want to emit a RELATIVE reloc. The entry in the
3203 global offset table will already have been initialized in the
3204 relocate_section function. */
3205 if (bfd_link_pic (info)
3206 && (info->symbolic || eh->dynindx == -1)
3207 && eh->def_regular)
3208 {
3209 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3210 rel.r_addend = (eh->root.u.def.value
3211 + eh->root.u.def.section->output_offset
3212 + eh->root.u.def.section->output_section->vma);
3213 }
3214 else
3215 {
3216 if ((eh->got.offset & 1) != 0)
3217 abort ();
3218 bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset);
3219 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3220 rel.r_addend = 0;
3221 }
3222
3223 loc = htab->srelgot->contents;
3224 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3225 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3226 }
3227
3228 if (eh->needs_copy)
3229 {
3230 asection *s;
3231
3232 /* This symbol needs a copy reloc. Set it up. */
3233
3234 if (! (eh->dynindx != -1
3235 && (eh->root.type == bfd_link_hash_defined
3236 || eh->root.type == bfd_link_hash_defweak)))
3237 abort ();
3238
3239 s = htab->srelbss;
3240
3241 rel.r_offset = (eh->root.u.def.value
3242 + eh->root.u.def.section->output_offset
3243 + eh->root.u.def.section->output_section->vma);
3244 rel.r_addend = 0;
3245 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3246 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3247 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3248 }
3249
3250 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3251 if (eh->root.root.string[0] == '_'
3252 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3253 || eh == htab->etab.hgot))
3254 {
3255 sym->st_shndx = SHN_ABS;
3256 }
3257
3258 return TRUE;
3259 }
3260
3261 /* Set the Meta ELF ABI version. */
3262
3263 static void
3264 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
3265 {
3266 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3267
3268 _bfd_elf_post_process_headers (abfd, link_info);
3269 i_ehdrp = elf_elfheader (abfd);
3270 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3271 }
3272
3273 /* Used to decide how to sort relocs in an optimal manner for the
3274 dynamic linker, before writing them out. */
3275
3276 static enum elf_reloc_type_class
3277 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3278 const asection *rel_sec ATTRIBUTE_UNUSED,
3279 const Elf_Internal_Rela *rela)
3280 {
3281 switch ((int) ELF32_R_TYPE (rela->r_info))
3282 {
3283 case R_METAG_RELATIVE:
3284 return reloc_class_relative;
3285 case R_METAG_JMP_SLOT:
3286 return reloc_class_plt;
3287 case R_METAG_COPY:
3288 return reloc_class_copy;
3289 default:
3290 return reloc_class_normal;
3291 }
3292 }
3293
3294 /* Finish up the dynamic sections. */
3295
3296 static bfd_boolean
3297 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3298 struct bfd_link_info *info)
3299 {
3300 bfd *dynobj;
3301 struct elf_metag_link_hash_table *htab;
3302 asection *sdyn;
3303
3304 htab = metag_link_hash_table (info);
3305 dynobj = htab->etab.dynobj;
3306
3307 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3308
3309 if (htab->etab.dynamic_sections_created)
3310 {
3311 asection *splt;
3312 Elf32_External_Dyn *dyncon, *dynconend;
3313
3314 if (sdyn == NULL)
3315 abort ();
3316
3317 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3318 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3319 for (; dyncon < dynconend; dyncon++)
3320 {
3321 Elf_Internal_Dyn dyn;
3322 asection *s;
3323
3324 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3325
3326 switch (dyn.d_tag)
3327 {
3328 default:
3329 continue;
3330
3331 case DT_PLTGOT:
3332 s = htab->sgot;
3333 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3334 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3335 break;
3336
3337 case DT_JMPREL:
3338 s = htab->srelplt;
3339 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3340 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3341 break;
3342
3343 case DT_PLTRELSZ:
3344 s = htab->srelplt;
3345 dyn.d_un.d_val = s->size;
3346 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3347 break;
3348
3349 case DT_RELASZ:
3350 /* Don't count procedure linkage table relocs in the
3351 overall reloc count. */
3352 if (htab->srelplt) {
3353 s = htab->srelplt;
3354 dyn.d_un.d_val -= s->size;
3355 }
3356 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3357 break;
3358
3359 case DT_RELA:
3360 /* We may not be using the standard ELF linker script.
3361 If .rela.plt is the first .rela section, we adjust
3362 DT_RELA to not include it. */
3363 if (htab->srelplt) {
3364 s = htab->srelplt;
3365 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3366 dyn.d_un.d_ptr += s->size;
3367 }
3368 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3369 break;
3370 }
3371
3372 }
3373
3374 /* Fill in the first entry in the procedure linkage table. */
3375 splt = htab->splt;
3376 if (splt && splt->size > 0)
3377 {
3378 unsigned long addr;
3379 /* addr = .got + 4 */
3380 addr = htab->sgot->output_section->vma +
3381 htab->sgot->output_offset + 4;
3382 if (bfd_link_pic (info))
3383 {
3384 addr -= splt->output_section->vma + splt->output_offset;
3385 bfd_put_32 (output_bfd,
3386 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3387 splt->contents);
3388 bfd_put_32 (output_bfd,
3389 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3390 splt->contents + 4);
3391 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3392 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3393 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3394 }
3395 else
3396 {
3397 bfd_put_32 (output_bfd,
3398 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3399 splt->contents);
3400 bfd_put_32 (output_bfd,
3401 plt0_entry[1] | ((addr & 0xffff) << 3),
3402 splt->contents + 4);
3403 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3404 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3405 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3406 }
3407
3408 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3409 PLT_ENTRY_SIZE;
3410 }
3411 }
3412
3413 if (htab->sgot != NULL && htab->sgot->size != 0)
3414 {
3415 /* Fill in the first entry in the global offset table.
3416 We use it to point to our dynamic section, if we have one. */
3417 bfd_put_32 (output_bfd,
3418 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3419 htab->sgot->contents);
3420
3421 /* The second entry is reserved for use by the dynamic linker. */
3422 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3423
3424 /* Set .got entry size. */
3425 elf_section_data (htab->sgot->output_section)
3426 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3427 }
3428
3429 return TRUE;
3430 }
3431
3432 /* Return the section that should be marked against GC for a given
3433 relocation. */
3434
3435 static asection *
3436 elf_metag_gc_mark_hook (asection *sec,
3437 struct bfd_link_info *info,
3438 Elf_Internal_Rela *rela,
3439 struct elf_link_hash_entry *hh,
3440 Elf_Internal_Sym *sym)
3441 {
3442 if (hh != NULL)
3443 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3444 {
3445 case R_METAG_GNU_VTINHERIT:
3446 case R_METAG_GNU_VTENTRY:
3447 return NULL;
3448 }
3449
3450 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3451 }
3452
3453 /* Update the got and plt entry reference counts for the section being
3454 removed. */
3455
3456 static bfd_boolean
3457 elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3458 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3459 asection *sec ATTRIBUTE_UNUSED,
3460 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3461 {
3462 Elf_Internal_Shdr *symtab_hdr;
3463 struct elf_link_hash_entry **eh_syms;
3464 bfd_signed_vma *local_got_refcounts;
3465 bfd_signed_vma *local_plt_refcounts;
3466 const Elf_Internal_Rela *rel, *relend;
3467
3468 if (bfd_link_relocatable (info))
3469 return TRUE;
3470
3471 elf_section_data (sec)->local_dynrel = NULL;
3472
3473 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3474 eh_syms = elf_sym_hashes (abfd);
3475 local_got_refcounts = elf_local_got_refcounts (abfd);
3476 local_plt_refcounts = local_got_refcounts;
3477 if (local_plt_refcounts != NULL)
3478 local_plt_refcounts += symtab_hdr->sh_info;
3479
3480 relend = relocs + sec->reloc_count;
3481 for (rel = relocs; rel < relend; rel++)
3482 {
3483 unsigned long r_symndx;
3484 unsigned int r_type;
3485 struct elf_link_hash_entry *eh = NULL;
3486
3487 r_symndx = ELF32_R_SYM (rel->r_info);
3488 if (r_symndx >= symtab_hdr->sh_info)
3489 {
3490 struct elf_metag_link_hash_entry *hh;
3491 struct elf_metag_dyn_reloc_entry **hdh_pp;
3492 struct elf_metag_dyn_reloc_entry *hdh_p;
3493
3494 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3495 while (eh->root.type == bfd_link_hash_indirect
3496 || eh->root.type == bfd_link_hash_warning)
3497 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3498 hh = (struct elf_metag_link_hash_entry *) eh;
3499
3500 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3501 hdh_pp = &hdh_p->hdh_next)
3502 if (hdh_p->sec == sec)
3503 {
3504 /* Everything must go for SEC. */
3505 *hdh_pp = hdh_p->hdh_next;
3506 break;
3507 }
3508 }
3509
3510 r_type = ELF32_R_TYPE (rel->r_info);
3511 switch (r_type)
3512 {
3513 case R_METAG_TLS_LDM:
3514 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3515 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3516 break;
3517 case R_METAG_TLS_IE:
3518 case R_METAG_TLS_GD:
3519 case R_METAG_GETSET_GOT:
3520 if (eh != NULL)
3521 {
3522 if (eh->got.refcount > 0)
3523 eh->got.refcount -= 1;
3524 }
3525 else if (local_got_refcounts != NULL)
3526 {
3527 if (local_got_refcounts[r_symndx] > 0)
3528 local_got_refcounts[r_symndx] -= 1;
3529 }
3530 break;
3531
3532 case R_METAG_RELBRANCH_PLT:
3533 if (eh != NULL)
3534 {
3535 if (eh->plt.refcount > 0)
3536 eh->plt.refcount -= 1;
3537 }
3538 break;
3539
3540 case R_METAG_ADDR32:
3541 case R_METAG_HIADDR16:
3542 case R_METAG_LOADDR16:
3543 case R_METAG_GETSETOFF:
3544 case R_METAG_RELBRANCH:
3545 if (eh != NULL)
3546 {
3547 struct elf_metag_link_hash_entry *hh;
3548 struct elf_metag_dyn_reloc_entry **hdh_pp;
3549 struct elf_metag_dyn_reloc_entry *hdh_p;
3550
3551 if (!bfd_link_pic (info) && eh->plt.refcount > 0)
3552 eh->plt.refcount -= 1;
3553
3554 hh = (struct elf_metag_link_hash_entry *) eh;
3555
3556 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3557 hdh_pp = &hdh_p->hdh_next)
3558 if (hdh_p->sec == sec)
3559 {
3560 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3561 hdh_p->relative_count -= 1;
3562 hdh_p->count -= 1;
3563 if (hdh_p->count == 0)
3564 *hdh_pp = hdh_p->hdh_next;
3565 break;
3566 }
3567 }
3568 break;
3569
3570 default:
3571 break;
3572 }
3573 }
3574
3575 return TRUE;
3576 }
3577
3578 /* Determine the type of stub needed, if any, for a call. */
3579
3580 static enum elf_metag_stub_type
3581 metag_type_of_stub (asection *input_sec,
3582 const Elf_Internal_Rela *rel,
3583 struct elf_metag_link_hash_entry *hh,
3584 bfd_vma destination,
3585 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3586 {
3587 bfd_vma location;
3588 bfd_vma branch_offset;
3589 bfd_vma max_branch_offset;
3590
3591 if (hh != NULL &&
3592 !(hh->eh.root.type == bfd_link_hash_defined
3593 || hh->eh.root.type == bfd_link_hash_defweak))
3594 return metag_stub_none;
3595
3596 /* Determine where the call point is. */
3597 location = (input_sec->output_offset
3598 + input_sec->output_section->vma
3599 + rel->r_offset);
3600
3601 branch_offset = destination - location;
3602
3603 /* Determine if a long branch stub is needed. Meta branch offsets
3604 are signed 19 bits 4 byte aligned. */
3605 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3606
3607 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3608 {
3609 if (bfd_link_pic (info))
3610 return metag_stub_long_branch_shared;
3611 else
3612 return metag_stub_long_branch;
3613 }
3614
3615 return metag_stub_none;
3616 }
3617
3618 #define MOVT_A0_3 0x82180005
3619 #define JUMP_A0_3 0xac180003
3620
3621 #define MOVT_A1LBP 0x83080005
3622 #define ADD_A1LBP 0x83080000
3623
3624 #define ADDT_A0_3_CPC 0x82980001
3625 #define ADD_A0_3_A0_3 0x82180000
3626 #define MOV_PC_A0_3 0xa3180ca0
3627
3628 static bfd_boolean
3629 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3630 {
3631 struct elf_metag_stub_hash_entry *hsh;
3632 asection *stub_sec;
3633 bfd *stub_bfd;
3634 bfd_byte *loc;
3635 bfd_vma sym_value;
3636 int size;
3637
3638 /* Massage our args to the form they really have. */
3639 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3640
3641 stub_sec = hsh->stub_sec;
3642
3643 /* Make a note of the offset within the stubs for this entry. */
3644 hsh->stub_offset = stub_sec->size;
3645 loc = stub_sec->contents + hsh->stub_offset;
3646
3647 stub_bfd = stub_sec->owner;
3648
3649 switch (hsh->stub_type)
3650 {
3651 case metag_stub_long_branch_shared:
3652 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3653 calculate the jump target using A0.3 as a temporary. Then a MOV
3654 to PC carries out the jump. */
3655 sym_value = (hsh->target_value
3656 + hsh->target_section->output_offset
3657 + hsh->target_section->output_section->vma
3658 + hsh->addend);
3659
3660 sym_value -= (hsh->stub_offset
3661 + stub_sec->output_offset
3662 + stub_sec->output_section->vma);
3663
3664 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3665 loc);
3666
3667 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3668 loc + 4);
3669
3670 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3671
3672 size = 12;
3673 break;
3674 case metag_stub_long_branch:
3675 /* A standard long branch stub is a MOVT instruction followed by a
3676 JUMP instruction using the A0.3 register as a temporary. This is
3677 the same method used by the LDLK linker (patch.c). */
3678 sym_value = (hsh->target_value
3679 + hsh->target_section->output_offset
3680 + hsh->target_section->output_section->vma
3681 + hsh->addend);
3682
3683 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3684 loc);
3685
3686 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3687
3688 size = 8;
3689 break;
3690 default:
3691 BFD_FAIL ();
3692 return FALSE;
3693 }
3694
3695 stub_sec->size += size;
3696 return TRUE;
3697 }
3698
3699 /* As above, but don't actually build the stub. Just bump offset so
3700 we know stub section sizes. */
3701
3702 static bfd_boolean
3703 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3704 {
3705 struct elf_metag_stub_hash_entry *hsh;
3706 int size = 0;
3707
3708 /* Massage our args to the form they really have. */
3709 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3710
3711 if (hsh->stub_type == metag_stub_long_branch)
3712 size = 8;
3713 else if (hsh->stub_type == metag_stub_long_branch_shared)
3714 size = 12;
3715
3716 hsh->stub_sec->size += size;
3717 return TRUE;
3718 }
3719
3720 /* Set up various things so that we can make a list of input sections
3721 for each output section included in the link. Returns -1 on error,
3722 0 when no stubs will be needed, and 1 on success. */
3723
3724 int
3725 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3726 {
3727 bfd *input_bfd;
3728 unsigned int bfd_count;
3729 unsigned int top_id, top_index;
3730 asection *section;
3731 asection **input_list, **list;
3732 bfd_size_type amt;
3733 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3734
3735 /* Count the number of input BFDs and find the top input section id. */
3736 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3737 input_bfd != NULL;
3738 input_bfd = input_bfd->link.next)
3739 {
3740 bfd_count += 1;
3741 for (section = input_bfd->sections;
3742 section != NULL;
3743 section = section->next)
3744 {
3745 if (top_id < section->id)
3746 top_id = section->id;
3747 }
3748 }
3749
3750 htab->bfd_count = bfd_count;
3751
3752 amt = sizeof (struct map_stub) * (top_id + 1);
3753 htab->stub_group = bfd_zmalloc (amt);
3754 if (htab->stub_group == NULL)
3755 return -1;
3756
3757 /* We can't use output_bfd->section_count here to find the top output
3758 section index as some sections may have been removed, and
3759 strip_excluded_output_sections doesn't renumber the indices. */
3760 for (section = output_bfd->sections, top_index = 0;
3761 section != NULL;
3762 section = section->next)
3763 {
3764 if (top_index < section->index)
3765 top_index = section->index;
3766 }
3767
3768 htab->top_index = top_index;
3769 amt = sizeof (asection *) * (top_index + 1);
3770 input_list = bfd_malloc (amt);
3771 htab->input_list = input_list;
3772 if (input_list == NULL)
3773 return -1;
3774
3775 /* For sections we aren't interested in, mark their entries with a
3776 value we can check later. */
3777 list = input_list + top_index;
3778 do
3779 *list = bfd_abs_section_ptr;
3780 while (list-- != input_list);
3781
3782 for (section = output_bfd->sections;
3783 section != NULL;
3784 section = section->next)
3785 {
3786 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3787 * have PC relative relocs in them but no code flag set. */
3788 if (((section->flags & SEC_CODE) != 0) ||
3789 strcmp(".ctors", section->name) ||
3790 strcmp(".dtors", section->name))
3791 input_list[section->index] = NULL;
3792 }
3793
3794 return 1;
3795 }
3796
3797 /* The linker repeatedly calls this function for each input section,
3798 in the order that input sections are linked into output sections.
3799 Build lists of input sections to determine groupings between which
3800 we may insert linker stubs. */
3801
3802 void
3803 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3804 {
3805 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3806
3807 if (isec->output_section->index <= htab->top_index)
3808 {
3809 asection **list = htab->input_list + isec->output_section->index;
3810 if (*list != bfd_abs_section_ptr)
3811 {
3812 /* Steal the link_sec pointer for our list. */
3813 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3814 /* This happens to make the list in reverse order,
3815 which is what we want. */
3816 PREV_SEC (isec) = *list;
3817 *list = isec;
3818 }
3819 }
3820 }
3821
3822 /* See whether we can group stub sections together. Grouping stub
3823 sections may result in fewer stubs. More importantly, we need to
3824 put all .init* and .fini* stubs at the beginning of the .init or
3825 .fini output sections respectively, because glibc splits the
3826 _init and _fini functions into multiple parts. Putting a stub in
3827 the middle of a function is not a good idea. */
3828
3829 static void
3830 group_sections (struct elf_metag_link_hash_table *htab,
3831 bfd_size_type stub_group_size,
3832 bfd_boolean stubs_always_before_branch)
3833 {
3834 asection **list = htab->input_list + htab->top_index;
3835 do
3836 {
3837 asection *tail = *list;
3838 if (tail == bfd_abs_section_ptr)
3839 continue;
3840 while (tail != NULL)
3841 {
3842 asection *curr;
3843 asection *prev;
3844 bfd_size_type total;
3845 bfd_boolean big_sec;
3846
3847 curr = tail;
3848 total = tail->size;
3849 big_sec = total >= stub_group_size;
3850
3851 while ((prev = PREV_SEC (curr)) != NULL
3852 && ((total += curr->output_offset - prev->output_offset)
3853 < stub_group_size))
3854 curr = prev;
3855
3856 /* OK, the size from the start of CURR to the end is less
3857 than stub_group_size bytes and thus can be handled by one stub
3858 section. (or the tail section is itself larger than
3859 stub_group_size bytes, in which case we may be toast.)
3860 We should really be keeping track of the total size of
3861 stubs added here, as stubs contribute to the final output
3862 section size. */
3863 do
3864 {
3865 prev = PREV_SEC (tail);
3866 /* Set up this stub group. */
3867 htab->stub_group[tail->id].link_sec = curr;
3868 }
3869 while (tail != curr && (tail = prev) != NULL);
3870
3871 /* But wait, there's more! Input sections up to stub_group_size
3872 bytes before the stub section can be handled by it too.
3873 Don't do this if we have a really large section after the
3874 stubs, as adding more stubs increases the chance that
3875 branches may not reach into the stub section. */
3876 if (!stubs_always_before_branch && !big_sec)
3877 {
3878 total = 0;
3879 while (prev != NULL
3880 && ((total += tail->output_offset - prev->output_offset)
3881 < stub_group_size))
3882 {
3883 tail = prev;
3884 prev = PREV_SEC (tail);
3885 htab->stub_group[tail->id].link_sec = curr;
3886 }
3887 }
3888 tail = prev;
3889 }
3890 }
3891 while (list-- != htab->input_list);
3892 free (htab->input_list);
3893 #undef PREV_SEC
3894 }
3895
3896 /* Read in all local syms for all input bfds.
3897 Returns -1 on error, 0 otherwise. */
3898
3899 static int
3900 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3901 struct bfd_link_info *info)
3902 {
3903 unsigned int bfd_indx;
3904 Elf_Internal_Sym *local_syms, **all_local_syms;
3905 int stub_changed = 0;
3906 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3907
3908 /* We want to read in symbol extension records only once. To do this
3909 we need to read in the local symbols in parallel and save them for
3910 later use; so hold pointers to the local symbols in an array. */
3911 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3912 all_local_syms = bfd_zmalloc (amt);
3913 htab->all_local_syms = all_local_syms;
3914 if (all_local_syms == NULL)
3915 return -1;
3916
3917 /* Walk over all the input BFDs, swapping in local symbols. */
3918 for (bfd_indx = 0;
3919 input_bfd != NULL;
3920 input_bfd = input_bfd->link.next, bfd_indx++)
3921 {
3922 Elf_Internal_Shdr *symtab_hdr;
3923
3924 /* We'll need the symbol table in a second. */
3925 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3926 if (symtab_hdr->sh_info == 0)
3927 continue;
3928
3929 /* We need an array of the local symbols attached to the input bfd. */
3930 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3931 if (local_syms == NULL)
3932 {
3933 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3934 symtab_hdr->sh_info, 0,
3935 NULL, NULL, NULL);
3936 /* Cache them for elf_link_input_bfd. */
3937 symtab_hdr->contents = (unsigned char *) local_syms;
3938 }
3939 if (local_syms == NULL)
3940 return -1;
3941
3942 all_local_syms[bfd_indx] = local_syms;
3943 }
3944
3945 return stub_changed;
3946 }
3947
3948 /* Determine and set the size of the stub section for a final link.
3949
3950 The basic idea here is to examine all the relocations looking for
3951 PC-relative calls to a target that is unreachable with a "CALLR"
3952 instruction. */
3953
3954 /* See elf32-hppa.c and elf64-ppc.c. */
3955
3956 bfd_boolean
3957 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3958 struct bfd_link_info *info,
3959 bfd_signed_vma group_size,
3960 asection * (*add_stub_section) (const char *, asection *),
3961 void (*layout_sections_again) (void))
3962 {
3963 bfd_size_type stub_group_size;
3964 bfd_boolean stubs_always_before_branch;
3965 bfd_boolean stub_changed;
3966 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3967
3968 /* Stash our params away. */
3969 htab->stub_bfd = stub_bfd;
3970 htab->add_stub_section = add_stub_section;
3971 htab->layout_sections_again = layout_sections_again;
3972 stubs_always_before_branch = group_size < 0;
3973 if (group_size < 0)
3974 stub_group_size = -group_size;
3975 else
3976 stub_group_size = group_size;
3977 if (stub_group_size == 1)
3978 {
3979 /* Default values. */
3980 /* FIXME: not sure what these values should be */
3981 if (stubs_always_before_branch)
3982 {
3983 stub_group_size = (1 << BRANCH_BITS);
3984 }
3985 else
3986 {
3987 stub_group_size = (1 << BRANCH_BITS);
3988 }
3989 }
3990
3991 group_sections (htab, stub_group_size, stubs_always_before_branch);
3992
3993 switch (get_local_syms (output_bfd, info->input_bfds, info))
3994 {
3995 default:
3996 if (htab->all_local_syms)
3997 goto error_ret_free_local;
3998 return FALSE;
3999
4000 case 0:
4001 stub_changed = FALSE;
4002 break;
4003
4004 case 1:
4005 stub_changed = TRUE;
4006 break;
4007 }
4008
4009 while (1)
4010 {
4011 bfd *input_bfd;
4012 unsigned int bfd_indx;
4013 asection *stub_sec;
4014
4015 for (input_bfd = info->input_bfds, bfd_indx = 0;
4016 input_bfd != NULL;
4017 input_bfd = input_bfd->link.next, bfd_indx++)
4018 {
4019 Elf_Internal_Shdr *symtab_hdr;
4020 asection *section;
4021 Elf_Internal_Sym *local_syms;
4022
4023 /* We'll need the symbol table in a second. */
4024 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4025 if (symtab_hdr->sh_info == 0)
4026 continue;
4027
4028 local_syms = htab->all_local_syms[bfd_indx];
4029
4030 /* Walk over each section attached to the input bfd. */
4031 for (section = input_bfd->sections;
4032 section != NULL;
4033 section = section->next)
4034 {
4035 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4036
4037 /* If there aren't any relocs, then there's nothing more
4038 to do. */
4039 if ((section->flags & SEC_RELOC) == 0
4040 || section->reloc_count == 0)
4041 continue;
4042
4043 /* If this section is a link-once section that will be
4044 discarded, then don't create any stubs. */
4045 if (section->output_section == NULL
4046 || section->output_section->owner != output_bfd)
4047 continue;
4048
4049 /* Get the relocs. */
4050 internal_relocs
4051 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4052 info->keep_memory);
4053 if (internal_relocs == NULL)
4054 goto error_ret_free_local;
4055
4056 /* Now examine each relocation. */
4057 irela = internal_relocs;
4058 irelaend = irela + section->reloc_count;
4059 for (; irela < irelaend; irela++)
4060 {
4061 unsigned int r_type, r_indx;
4062 enum elf_metag_stub_type stub_type;
4063 struct elf_metag_stub_hash_entry *hsh;
4064 asection *sym_sec;
4065 bfd_vma sym_value;
4066 bfd_vma destination;
4067 struct elf_metag_link_hash_entry *hh;
4068 char *stub_name;
4069 const asection *id_sec;
4070
4071 r_type = ELF32_R_TYPE (irela->r_info);
4072 r_indx = ELF32_R_SYM (irela->r_info);
4073
4074 if (r_type >= (unsigned int) R_METAG_MAX)
4075 {
4076 bfd_set_error (bfd_error_bad_value);
4077 error_ret_free_internal:
4078 if (elf_section_data (section)->relocs == NULL)
4079 free (internal_relocs);
4080 goto error_ret_free_local;
4081 }
4082
4083 /* Only look for stubs on CALLR and B instructions. */
4084 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4085 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4086 continue;
4087
4088 /* Now determine the call target, its name, value,
4089 section. */
4090 sym_sec = NULL;
4091 sym_value = 0;
4092 destination = 0;
4093 hh = NULL;
4094 if (r_indx < symtab_hdr->sh_info)
4095 {
4096 /* It's a local symbol. */
4097 Elf_Internal_Sym *sym;
4098 Elf_Internal_Shdr *hdr;
4099 unsigned int shndx;
4100
4101 sym = local_syms + r_indx;
4102 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4103 sym_value = sym->st_value;
4104 shndx = sym->st_shndx;
4105 if (shndx < elf_numsections (input_bfd))
4106 {
4107 hdr = elf_elfsections (input_bfd)[shndx];
4108 sym_sec = hdr->bfd_section;
4109 destination = (sym_value + irela->r_addend
4110 + sym_sec->output_offset
4111 + sym_sec->output_section->vma);
4112 }
4113 }
4114 else
4115 {
4116 /* It's an external symbol. */
4117 int e_indx;
4118
4119 e_indx = r_indx - symtab_hdr->sh_info;
4120 hh = ((struct elf_metag_link_hash_entry *)
4121 elf_sym_hashes (input_bfd)[e_indx]);
4122
4123 while (hh->eh.root.type == bfd_link_hash_indirect
4124 || hh->eh.root.type == bfd_link_hash_warning)
4125 hh = ((struct elf_metag_link_hash_entry *)
4126 hh->eh.root.u.i.link);
4127
4128 if (hh->eh.root.type == bfd_link_hash_defined
4129 || hh->eh.root.type == bfd_link_hash_defweak)
4130 {
4131 sym_sec = hh->eh.root.u.def.section;
4132 sym_value = hh->eh.root.u.def.value;
4133 if (hh->eh.plt.offset != (bfd_vma) -1
4134 && hh->eh.dynindx != -1
4135 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4136 {
4137 sym_sec = htab->splt;
4138 sym_value = hh->eh.plt.offset;
4139 }
4140
4141 if (sym_sec->output_section != NULL)
4142 destination = (sym_value + irela->r_addend
4143 + sym_sec->output_offset
4144 + sym_sec->output_section->vma);
4145 else
4146 continue;
4147 }
4148 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4149 {
4150 if (! bfd_link_pic (info))
4151 continue;
4152 }
4153 else if (hh->eh.root.type == bfd_link_hash_undefined)
4154 {
4155 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4156 && (ELF_ST_VISIBILITY (hh->eh.other)
4157 == STV_DEFAULT)))
4158 continue;
4159 }
4160 else
4161 {
4162 bfd_set_error (bfd_error_bad_value);
4163 goto error_ret_free_internal;
4164 }
4165 }
4166
4167 /* Determine what (if any) linker stub is needed. */
4168 stub_type = metag_type_of_stub (section, irela, hh,
4169 destination, info);
4170 if (stub_type == metag_stub_none)
4171 continue;
4172
4173 /* Support for grouping stub sections. */
4174 id_sec = htab->stub_group[section->id].link_sec;
4175
4176 /* Get the name of this stub. */
4177 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4178 if (!stub_name)
4179 goto error_ret_free_internal;
4180
4181 hsh = metag_stub_hash_lookup (&htab->bstab,
4182 stub_name,
4183 FALSE, FALSE);
4184 if (hsh != NULL)
4185 {
4186 /* The proper stub has already been created. */
4187 free (stub_name);
4188 continue;
4189 }
4190
4191 hsh = metag_add_stub (stub_name, section, htab);
4192 if (hsh == NULL)
4193 {
4194 free (stub_name);
4195 goto error_ret_free_internal;
4196 }
4197 hsh->target_value = sym_value;
4198 hsh->target_section = sym_sec;
4199 hsh->stub_type = stub_type;
4200 hsh->hh = hh;
4201 hsh->addend = irela->r_addend;
4202 stub_changed = TRUE;
4203 }
4204
4205 /* We're done with the internal relocs, free them. */
4206 if (elf_section_data (section)->relocs == NULL)
4207 free (internal_relocs);
4208 }
4209 }
4210
4211 if (!stub_changed)
4212 break;
4213
4214 /* OK, we've added some stubs. Find out the new size of the
4215 stub sections. */
4216 for (stub_sec = htab->stub_bfd->sections;
4217 stub_sec != NULL;
4218 stub_sec = stub_sec->next)
4219 stub_sec->size = 0;
4220
4221 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4222
4223 /* Ask the linker to do its stuff. */
4224 (*htab->layout_sections_again) ();
4225 stub_changed = FALSE;
4226 }
4227
4228 free (htab->all_local_syms);
4229 return TRUE;
4230
4231 error_ret_free_local:
4232 free (htab->all_local_syms);
4233 return FALSE;
4234 }
4235
4236 /* Build all the stubs associated with the current output file. The
4237 stubs are kept in a hash table attached to the main linker hash
4238 table. This function is called via metagelf_finish in the linker. */
4239
4240 bfd_boolean
4241 elf_metag_build_stubs (struct bfd_link_info *info)
4242 {
4243 asection *stub_sec;
4244 struct bfd_hash_table *table;
4245 struct elf_metag_link_hash_table *htab;
4246
4247 htab = metag_link_hash_table (info);
4248
4249 for (stub_sec = htab->stub_bfd->sections;
4250 stub_sec != NULL;
4251 stub_sec = stub_sec->next)
4252 {
4253 bfd_size_type size;
4254
4255 /* Allocate memory to hold the linker stubs. */
4256 size = stub_sec->size;
4257 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4258 if (stub_sec->contents == NULL && size != 0)
4259 return FALSE;
4260 stub_sec->size = 0;
4261 }
4262
4263 /* Build the stubs as directed by the stub hash table. */
4264 table = &htab->bstab;
4265 bfd_hash_traverse (table, metag_build_one_stub, info);
4266
4267 return TRUE;
4268 }
4269
4270 /* Return TRUE if SYM represents a local label symbol. */
4271
4272 static bfd_boolean
4273 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4274 {
4275 if (name[0] == '$' && name[1] == 'L')
4276 return 1;
4277 return _bfd_elf_is_local_label_name (abfd, name);
4278 }
4279
4280 /* Return address for Ith PLT stub in section PLT, for relocation REL
4281 or (bfd_vma) -1 if it should not be included. */
4282
4283 static bfd_vma
4284 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4285 const arelent *rel ATTRIBUTE_UNUSED)
4286 {
4287 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4288 }
4289
4290 #define ELF_ARCH bfd_arch_metag
4291 #define ELF_TARGET_ID METAG_ELF_DATA
4292 #define ELF_MACHINE_CODE EM_METAG
4293 #define ELF_MINPAGESIZE 0x1000
4294 #define ELF_MAXPAGESIZE 0x4000
4295 #define ELF_COMMONPAGESIZE 0x1000
4296
4297 #define TARGET_LITTLE_SYM metag_elf32_vec
4298 #define TARGET_LITTLE_NAME "elf32-metag"
4299
4300 #define elf_symbol_leading_char '_'
4301
4302 #define elf_info_to_howto_rel NULL
4303 #define elf_info_to_howto metag_info_to_howto_rela
4304
4305 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4306 #define bfd_elf32_bfd_link_hash_table_create \
4307 elf_metag_link_hash_table_create
4308 #define elf_backend_relocate_section elf_metag_relocate_section
4309 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4310 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4311 #define elf_backend_check_relocs elf_metag_check_relocs
4312 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4313 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4314 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4315 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4316 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4317 #define elf_backend_omit_section_dynsym \
4318 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4319 #define elf_backend_post_process_headers elf_metag_post_process_headers
4320 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4321 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4322 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4323
4324 #define elf_backend_can_gc_sections 1
4325 #define elf_backend_can_refcount 1
4326 #define elf_backend_got_header_size 12
4327 #define elf_backend_rela_normal 1
4328 #define elf_backend_want_got_sym 0
4329 #define elf_backend_want_plt_sym 0
4330 #define elf_backend_plt_readonly 1
4331
4332 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4333 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4334
4335 #include "elf32-target.h"
GDB Binutils - Deliverables
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