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Fix read-beyond-end-of-buffer error in script parsing.
[thirdparty/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2016 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
28
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32 /* ABI version:
33 0 - original
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
36
37 static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46 static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55 static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64 static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95 static reloc_howto_type elf_metag_howto_table[] =
96 {
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 };
682
683 #define BRANCH_BITS 19
684
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
695
696 struct metag_reloc_map
697 {
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700 };
701
702 static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746 enum elf_metag_stub_type
747 {
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751 };
752
753 struct elf_metag_stub_hash_entry
754 {
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780 };
781
782 struct elf_metag_link_hash_entry
783 {
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811 };
812
813 struct elf_metag_link_hash_table
814 {
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 unsigned int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sdynbss;
847 asection *srelbss;
848
849 /* Small local sym cache. */
850 struct sym_cache sym_cache;
851
852 /* Data for LDM relocations. */
853 union
854 {
855 bfd_signed_vma refcount;
856 bfd_vma offset;
857 } tls_ldm_got;
858 };
859
860 /* Return the base vma address which should be subtracted from the
861 real address when resolving a dtpoff relocation. This is PT_TLS
862 segment p_vaddr. */
863 static bfd_vma
864 dtpoff_base (struct bfd_link_info *info)
865 {
866 /* If tls_sec is NULL, we should have signalled an error already. */
867 if (elf_hash_table (info)->tls_sec == NULL)
868 return 0;
869 return elf_hash_table (info)->tls_sec->vma;
870 }
871
872 /* Return the relocation value for R_METAG_TLS_IE */
873 static bfd_vma
874 tpoff (struct bfd_link_info *info, bfd_vma address)
875 {
876 /* If tls_sec is NULL, we should have signalled an error already. */
877 if (elf_hash_table (info)->tls_sec == NULL)
878 return 0;
879 /* METAG TLS ABI is variant I and static TLS blocks start just after
880 tcbhead structure which has 2 pointer fields. */
881 return (address - elf_hash_table (info)->tls_sec->vma
882 + align_power ((bfd_vma) 8,
883 elf_hash_table (info)->tls_sec->alignment_power));
884 }
885
886 static void
887 metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
888 arelent *cache_ptr,
889 Elf_Internal_Rela *dst)
890 {
891 unsigned int r_type;
892
893 r_type = ELF32_R_TYPE (dst->r_info);
894 if (r_type >= (unsigned int) R_METAG_MAX)
895 {
896 /* xgettext:c-format */
897 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
898 r_type = 0;
899 }
900 cache_ptr->howto = & elf_metag_howto_table [r_type];
901 }
902
903 static reloc_howto_type *
904 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
905 bfd_reloc_code_real_type code)
906 {
907 unsigned int i;
908
909 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
910 if (metag_reloc_map [i].bfd_reloc_val == code)
911 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
912
913 return NULL;
914 }
915
916 static reloc_howto_type *
917 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
918 const char *r_name)
919 {
920 unsigned int i;
921
922 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
923 if (elf_metag_howto_table[i].name != NULL
924 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
925 return &elf_metag_howto_table[i];
926
927 return NULL;
928 }
929
930 /* Various hash macros and functions. */
931 #define metag_link_hash_table(p) \
932 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
933 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
934
935 #define metag_elf_hash_entry(ent) \
936 ((struct elf_metag_link_hash_entry *)(ent))
937
938 #define metag_stub_hash_entry(ent) \
939 ((struct elf_metag_stub_hash_entry *)(ent))
940
941 #define metag_stub_hash_lookup(table, string, create, copy) \
942 ((struct elf_metag_stub_hash_entry *) \
943 bfd_hash_lookup ((table), (string), (create), (copy)))
944
945 #define metag_elf_local_got_tls_type(abfd) \
946 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
947
948 /* Assorted hash table functions. */
949
950 /* Initialize an entry in the stub hash table. */
951
952 static struct bfd_hash_entry *
953 stub_hash_newfunc (struct bfd_hash_entry *entry,
954 struct bfd_hash_table *table,
955 const char *string)
956 {
957 /* Allocate the structure if it has not already been allocated by a
958 subclass. */
959 if (entry == NULL)
960 {
961 entry = bfd_hash_allocate (table,
962 sizeof (struct elf_metag_stub_hash_entry));
963 if (entry == NULL)
964 return entry;
965 }
966
967 /* Call the allocation method of the superclass. */
968 entry = bfd_hash_newfunc (entry, table, string);
969 if (entry != NULL)
970 {
971 struct elf_metag_stub_hash_entry *hsh;
972
973 /* Initialize the local fields. */
974 hsh = (struct elf_metag_stub_hash_entry *) entry;
975 hsh->stub_sec = NULL;
976 hsh->stub_offset = 0;
977 hsh->target_value = 0;
978 hsh->target_section = NULL;
979 hsh->stub_type = metag_stub_long_branch;
980 hsh->hh = NULL;
981 hsh->id_sec = NULL;
982 }
983
984 return entry;
985 }
986
987 /* Initialize an entry in the link hash table. */
988
989 static struct bfd_hash_entry *
990 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
991 struct bfd_hash_table *table,
992 const char *string)
993 {
994 /* Allocate the structure if it has not already been allocated by a
995 subclass. */
996 if (entry == NULL)
997 {
998 entry = bfd_hash_allocate (table,
999 sizeof (struct elf_metag_link_hash_entry));
1000 if (entry == NULL)
1001 return entry;
1002 }
1003
1004 /* Call the allocation method of the superclass. */
1005 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1006 if (entry != NULL)
1007 {
1008 struct elf_metag_link_hash_entry *hh;
1009
1010 /* Initialize the local fields. */
1011 hh = (struct elf_metag_link_hash_entry *) entry;
1012 hh->hsh_cache = NULL;
1013 hh->dyn_relocs = NULL;
1014 hh->tls_type = GOT_UNKNOWN;
1015 }
1016
1017 return entry;
1018 }
1019
1020 /* Free the derived linker hash table. */
1021
1022 static void
1023 elf_metag_link_hash_table_free (bfd *obfd)
1024 {
1025 struct elf_metag_link_hash_table *htab
1026 = (struct elf_metag_link_hash_table *) obfd->link.hash;
1027
1028 bfd_hash_table_free (&htab->bstab);
1029 _bfd_elf_link_hash_table_free (obfd);
1030 }
1031
1032 /* Create the derived linker hash table. The Meta ELF port uses the derived
1033 hash table to keep information specific to the Meta ELF linker (without
1034 using static variables). */
1035
1036 static struct bfd_link_hash_table *
1037 elf_metag_link_hash_table_create (bfd *abfd)
1038 {
1039 struct elf_metag_link_hash_table *htab;
1040 bfd_size_type amt = sizeof (*htab);
1041
1042 htab = bfd_zmalloc (amt);
1043 if (htab == NULL)
1044 return NULL;
1045
1046 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1047 metag_link_hash_newfunc,
1048 sizeof (struct elf_metag_link_hash_entry),
1049 METAG_ELF_DATA))
1050 {
1051 free (htab);
1052 return NULL;
1053 }
1054
1055 /* Init the stub hash table too. */
1056 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1057 sizeof (struct elf_metag_stub_hash_entry)))
1058 {
1059 _bfd_elf_link_hash_table_free (abfd);
1060 return NULL;
1061 }
1062 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
1063
1064 return &htab->etab.root;
1065 }
1066
1067 /* Section name for stubs is the associated section name plus this
1068 string. */
1069 #define STUB_SUFFIX ".stub"
1070
1071 /* Build a name for an entry in the stub hash table. */
1072
1073 static char *
1074 metag_stub_name (const asection *input_section,
1075 const asection *sym_sec,
1076 const struct elf_metag_link_hash_entry *hh,
1077 const Elf_Internal_Rela *rel)
1078 {
1079 char *stub_name;
1080 bfd_size_type len;
1081
1082 if (hh)
1083 {
1084 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1085 stub_name = bfd_malloc (len);
1086 if (stub_name != NULL)
1087 {
1088 sprintf (stub_name, "%08x_%s+%x",
1089 input_section->id & 0xffffffff,
1090 hh->eh.root.root.string,
1091 (int) rel->r_addend & 0xffffffff);
1092 }
1093 }
1094 else
1095 {
1096 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1097 stub_name = bfd_malloc (len);
1098 if (stub_name != NULL)
1099 {
1100 sprintf (stub_name, "%08x_%x:%x+%x",
1101 input_section->id & 0xffffffff,
1102 sym_sec->id & 0xffffffff,
1103 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1104 (int) rel->r_addend & 0xffffffff);
1105 }
1106 }
1107 return stub_name;
1108 }
1109
1110 /* Look up an entry in the stub hash. Stub entries are cached because
1111 creating the stub name takes a bit of time. */
1112
1113 static struct elf_metag_stub_hash_entry *
1114 metag_get_stub_entry (const asection *input_section,
1115 const asection *sym_sec,
1116 struct elf_metag_link_hash_entry *hh,
1117 const Elf_Internal_Rela *rel,
1118 struct elf_metag_link_hash_table *htab)
1119 {
1120 struct elf_metag_stub_hash_entry *hsh;
1121 const asection *id_sec;
1122
1123 /* If this input section is part of a group of sections sharing one
1124 stub section, then use the id of the first section in the group.
1125 Stub names need to include a section id, as there may well be
1126 more than one stub used to reach say, printf, and we need to
1127 distinguish between them. */
1128 id_sec = htab->stub_group[input_section->id].link_sec;
1129
1130 if (hh != NULL && hh->hsh_cache != NULL
1131 && hh->hsh_cache->hh == hh
1132 && hh->hsh_cache->id_sec == id_sec)
1133 {
1134 hsh = hh->hsh_cache;
1135 }
1136 else
1137 {
1138 char *stub_name;
1139
1140 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1141 if (stub_name == NULL)
1142 return NULL;
1143
1144 hsh = metag_stub_hash_lookup (&htab->bstab,
1145 stub_name, FALSE, FALSE);
1146
1147 if (hh != NULL)
1148 hh->hsh_cache = hsh;
1149
1150 free (stub_name);
1151 }
1152
1153 return hsh;
1154 }
1155
1156 /* Add a new stub entry to the stub hash. Not all fields of the new
1157 stub entry are initialised. */
1158
1159 static struct elf_metag_stub_hash_entry *
1160 metag_add_stub (const char *stub_name,
1161 asection *section,
1162 struct elf_metag_link_hash_table *htab)
1163 {
1164 asection *link_sec;
1165 asection *stub_sec;
1166 struct elf_metag_stub_hash_entry *hsh;
1167
1168 link_sec = htab->stub_group[section->id].link_sec;
1169 stub_sec = htab->stub_group[section->id].stub_sec;
1170 if (stub_sec == NULL)
1171 {
1172 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1173 if (stub_sec == NULL)
1174 {
1175 size_t namelen;
1176 bfd_size_type len;
1177 char *s_name;
1178
1179 namelen = strlen (link_sec->name);
1180 len = namelen + sizeof (STUB_SUFFIX);
1181 s_name = bfd_alloc (htab->stub_bfd, len);
1182 if (s_name == NULL)
1183 return NULL;
1184
1185 memcpy (s_name, link_sec->name, namelen);
1186 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1187
1188 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1189 if (stub_sec == NULL)
1190 return NULL;
1191 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1192 }
1193 htab->stub_group[section->id].stub_sec = stub_sec;
1194 }
1195
1196 /* Enter this entry into the linker stub hash table. */
1197 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1198 TRUE, FALSE);
1199 if (hsh == NULL)
1200 {
1201 /* xgettext:c-format */
1202 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1203 section->owner, stub_name);
1204 return NULL;
1205 }
1206
1207 hsh->stub_sec = stub_sec;
1208 hsh->stub_offset = 0;
1209 hsh->id_sec = link_sec;
1210 return hsh;
1211 }
1212
1213 /* Check a signed integer value can be represented in the given number
1214 of bits. */
1215
1216 static bfd_boolean
1217 within_signed_range (int value, unsigned int bits)
1218 {
1219 int min_val = -(1 << (bits - 1));
1220 int max_val = (1 << (bits - 1)) - 1;
1221 return (value <= max_val) && (value >= min_val);
1222 }
1223
1224 /* Perform a relocation as part of a final link. */
1225
1226 static bfd_reloc_status_type
1227 metag_final_link_relocate (reloc_howto_type *howto,
1228 bfd *input_bfd,
1229 asection *input_section,
1230 bfd_byte *contents,
1231 Elf_Internal_Rela *rel,
1232 bfd_vma relocation,
1233 struct elf_metag_link_hash_entry *hh,
1234 struct elf_metag_link_hash_table *htab,
1235 asection *sym_sec)
1236 {
1237 bfd_reloc_status_type r = bfd_reloc_ok;
1238 bfd_byte *hit_data = contents + rel->r_offset;
1239 int opcode, op_shift, op_extended, l1, l2;
1240 bfd_signed_vma srel, addend = rel->r_addend;
1241 struct elf_metag_stub_hash_entry *hsh = NULL;
1242 bfd_vma location;
1243
1244 /* Find out where we are and where we're going. */
1245 location = (rel->r_offset +
1246 input_section->output_offset +
1247 input_section->output_section->vma);
1248
1249 switch (howto->type)
1250 {
1251 case R_METAG_RELBRANCH:
1252 case R_METAG_RELBRANCH_PLT:
1253 /* Make it a pc relative offset. */
1254 relocation -= location;
1255 break;
1256 case R_METAG_TLS_GD:
1257 case R_METAG_TLS_IE:
1258 relocation -= elf_gp (input_section->output_section->owner);
1259 break;
1260 default:
1261 break;
1262 }
1263
1264 switch (howto->type)
1265 {
1266 case R_METAG_RELBRANCH_PLT:
1267 case R_METAG_RELBRANCH:
1268 opcode = bfd_get_32 (input_bfd, hit_data);
1269
1270 srel = (bfd_signed_vma) relocation;
1271 srel += addend;
1272
1273 /* If the branch is out of reach, then redirect the
1274 call to the local stub for this function. */
1275 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1276 (srel < - (1 << (BRANCH_BITS + 1))))
1277 {
1278 if (sym_sec == NULL)
1279 break;
1280
1281 hsh = metag_get_stub_entry (input_section, sym_sec,
1282 hh, rel, htab);
1283 if (hsh == NULL)
1284 return bfd_reloc_undefined;
1285
1286 /* Munge up the value and addend so that we call the stub
1287 rather than the procedure directly. */
1288 srel = (hsh->stub_offset
1289 + hsh->stub_sec->output_offset
1290 + hsh->stub_sec->output_section->vma);
1291 srel -= location;
1292 }
1293
1294 srel = srel >> 2;
1295
1296 if (!within_signed_range (srel, BRANCH_BITS))
1297 {
1298 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1299 srel = 0;
1300 else
1301 return bfd_reloc_overflow;
1302 }
1303
1304 opcode &= ~(0x7ffff << 5);
1305 opcode |= ((srel & 0x7ffff) << 5);
1306
1307 bfd_put_32 (input_bfd, opcode, hit_data);
1308 break;
1309 case R_METAG_GETSETOFF:
1310 case R_METAG_GETSET_GOT:
1311 case R_METAG_GETSET_GOTOFF:
1312 opcode = bfd_get_32 (input_bfd, hit_data);
1313
1314 srel = (bfd_signed_vma) relocation;
1315 srel += addend;
1316
1317 /* Is this a standard or extended GET/SET? */
1318 if ((opcode & 0xf0000000) == 0xa0000000)
1319 {
1320 /* Extended GET/SET. */
1321 l1 = opcode & 0x2;
1322 l2 = opcode & 0x4;
1323 op_extended = 1;
1324 }
1325 else
1326 {
1327 /* Standard GET/SET. */
1328 l1 = opcode & 0x01000000;
1329 l2 = opcode & 0x04000000;
1330 op_extended = 0;
1331 }
1332
1333 /* Calculate the width of the GET/SET and how much we need to
1334 shift the result by. */
1335 if (l2)
1336 if (l1)
1337 op_shift = 3;
1338 else
1339 op_shift = 2;
1340 else
1341 if (l1)
1342 op_shift = 1;
1343 else
1344 op_shift = 0;
1345
1346 /* GET/SET offsets are scaled by the width of the transfer. */
1347 srel = srel >> op_shift;
1348
1349 /* Extended GET/SET has signed 12 bits of offset, standard has
1350 signed 6 bits. */
1351 if (op_extended)
1352 {
1353 if (!within_signed_range (srel, 12))
1354 {
1355 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1356 srel = 0;
1357 else
1358 return bfd_reloc_overflow;
1359 }
1360 opcode &= ~(0xfff << 7);
1361 opcode |= ((srel & 0xfff) << 7);
1362 }
1363 else
1364 {
1365 if (!within_signed_range (srel, 5))
1366 {
1367 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1368 srel = 0;
1369 else
1370 return bfd_reloc_overflow;
1371 }
1372 opcode &= ~(0x3f << 8);
1373 opcode |= ((srel & 0x3f) << 8);
1374 }
1375
1376 bfd_put_32 (input_bfd, opcode, hit_data);
1377 break;
1378 case R_METAG_TLS_GD:
1379 case R_METAG_TLS_LDM:
1380 opcode = bfd_get_32 (input_bfd, hit_data);
1381
1382 if ((bfd_signed_vma)relocation < 0)
1383 {
1384 /* sign extend immediate */
1385 if ((opcode & 0xf2000001) == 0x02000000)
1386 {
1387 /* ADD De.e,Dx.r,#I16 */
1388 /* set SE bit */
1389 opcode |= (1 << 1);
1390 } else
1391 return bfd_reloc_overflow;
1392 }
1393
1394 bfd_put_32 (input_bfd, opcode, hit_data);
1395
1396 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1397 contents, rel->r_offset,
1398 relocation, rel->r_addend);
1399 break;
1400 default:
1401 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1402 contents, rel->r_offset,
1403 relocation, rel->r_addend);
1404 }
1405
1406 return r;
1407 }
1408
1409 /* This is defined because R_METAG_NONE != 0...
1410 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1411 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1412 rel, relend, howto, contents) \
1413 { \
1414 _bfd_clear_contents (howto, input_bfd, input_section, \
1415 contents + rel->r_offset); \
1416 \
1417 if (bfd_link_relocatable (info) \
1418 && (input_section->flags & SEC_DEBUGGING)) \
1419 { \
1420 /* Only remove relocations in debug sections since other \
1421 sections may require relocations. */ \
1422 Elf_Internal_Shdr *rel_hdr; \
1423 \
1424 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1425 \
1426 /* Avoid empty output section. */ \
1427 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1428 { \
1429 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1430 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1431 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1432 \
1433 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1434 \
1435 input_section->reloc_count--; \
1436 relend--; \
1437 rel--; \
1438 continue; \
1439 } \
1440 } \
1441 \
1442 rel->r_info = R_METAG_NONE; \
1443 rel->r_addend = 0; \
1444 continue; \
1445 }
1446
1447 /* Relocate a META ELF section.
1448
1449 The RELOCATE_SECTION function is called by the new ELF backend linker
1450 to handle the relocations for a section.
1451
1452 The relocs are always passed as Rela structures; if the section
1453 actually uses Rel structures, the r_addend field will always be
1454 zero.
1455
1456 This function is responsible for adjusting the section contents as
1457 necessary, and (if using Rela relocs and generating a relocatable
1458 output file) adjusting the reloc addend as necessary.
1459
1460 This function does not have to worry about setting the reloc
1461 address or the reloc symbol index.
1462
1463 LOCAL_SYMS is a pointer to the swapped in local symbols.
1464
1465 LOCAL_SECTIONS is an array giving the section in the input file
1466 corresponding to the st_shndx field of each local symbol.
1467
1468 The global hash table entry for the global symbols can be found
1469 via elf_sym_hashes (input_bfd).
1470
1471 When generating relocatable output, this function must handle
1472 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1473 going to be the section symbol corresponding to the output
1474 section, which means that the addend must be adjusted
1475 accordingly. */
1476
1477 static bfd_boolean
1478 elf_metag_relocate_section (bfd *output_bfd,
1479 struct bfd_link_info *info,
1480 bfd *input_bfd,
1481 asection *input_section,
1482 bfd_byte *contents,
1483 Elf_Internal_Rela *relocs,
1484 Elf_Internal_Sym *local_syms,
1485 asection **local_sections)
1486 {
1487 bfd_vma *local_got_offsets;
1488 Elf_Internal_Shdr *symtab_hdr;
1489 struct elf_link_hash_entry **eh_syms;
1490 struct elf_metag_link_hash_table *htab;
1491 Elf_Internal_Rela *rel;
1492 Elf_Internal_Rela *relend;
1493 asection *sreloc;
1494
1495 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1496 eh_syms = elf_sym_hashes (input_bfd);
1497 relend = relocs + input_section->reloc_count;
1498
1499 htab = metag_link_hash_table (info);
1500 local_got_offsets = elf_local_got_offsets (input_bfd);
1501
1502 sreloc = NULL;
1503
1504 for (rel = relocs; rel < relend; rel ++)
1505 {
1506 reloc_howto_type *howto;
1507 unsigned long r_symndx;
1508 Elf_Internal_Sym *sym;
1509 asection *sec;
1510 struct elf_metag_link_hash_entry *hh;
1511 bfd_vma relocation;
1512 bfd_reloc_status_type r;
1513 const char *name;
1514 int r_type;
1515
1516 r_type = ELF32_R_TYPE (rel->r_info);
1517
1518 if (r_type == R_METAG_GNU_VTINHERIT
1519 || r_type == R_METAG_GNU_VTENTRY
1520 || r_type == R_METAG_NONE)
1521 continue;
1522
1523 r_symndx = ELF32_R_SYM (rel->r_info);
1524
1525 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1526 hh = NULL;
1527 sym = NULL;
1528 sec = NULL;
1529
1530 if (r_symndx < symtab_hdr->sh_info)
1531 {
1532 sym = local_syms + r_symndx;
1533 sec = local_sections [r_symndx];
1534 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1535
1536 name = bfd_elf_string_from_elf_section
1537 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1538 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1539 }
1540 else
1541 {
1542 struct elf_link_hash_entry *eh;
1543 bfd_boolean unresolved_reloc, warned, ignored;
1544
1545 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1546 r_symndx, symtab_hdr, eh_syms,
1547 eh, sec, relocation,
1548 unresolved_reloc, warned, ignored);
1549
1550 name = eh->root.root.string;
1551 hh = (struct elf_metag_link_hash_entry *) eh;
1552 }
1553
1554 if (sec != NULL && discarded_section (sec))
1555 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1556 rel, relend, howto, contents);
1557
1558 if (bfd_link_relocatable (info))
1559 continue;
1560
1561 switch (r_type)
1562 {
1563 case R_METAG_ADDR32:
1564 case R_METAG_RELBRANCH:
1565 if ((input_section->flags & SEC_ALLOC) == 0)
1566 break;
1567
1568 if ((bfd_link_pic (info)
1569 && r_symndx != STN_UNDEF
1570 && (input_section->flags & SEC_ALLOC) != 0
1571 && (r_type != R_METAG_RELBRANCH
1572 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1573 || (!bfd_link_pic (info)
1574 && hh != NULL
1575 && hh->eh.dynindx != -1
1576 && !hh->eh.non_got_ref
1577 && ((hh->eh.def_dynamic
1578 && !hh->eh.def_regular)
1579 || hh->eh.root.type == bfd_link_hash_undefweak
1580 || hh->eh.root.type == bfd_link_hash_undefined)))
1581 {
1582 Elf_Internal_Rela outrel;
1583 bfd_boolean skip, relocate;
1584 bfd_byte *loc;
1585
1586 /* When generating a shared object, these relocations
1587 are copied into the output file to be resolved at run
1588 time. */
1589
1590 sreloc = elf_section_data (input_section)->sreloc;
1591 BFD_ASSERT (sreloc != NULL);
1592
1593 skip = FALSE;
1594 relocate = FALSE;
1595
1596 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1597 info,
1598 input_section,
1599 rel->r_offset);
1600 if (outrel.r_offset == (bfd_vma) -1)
1601 skip = TRUE;
1602 else if (outrel.r_offset == (bfd_vma) -2)
1603 skip = TRUE, relocate = TRUE;
1604 outrel.r_offset += (input_section->output_section->vma
1605 + input_section->output_offset);
1606
1607 if (skip)
1608 {
1609 memset (&outrel, 0, sizeof outrel);
1610 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1611 }
1612 else if (r_type == R_METAG_RELBRANCH)
1613 {
1614 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1615 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1616 outrel.r_addend = rel->r_addend;
1617 }
1618 else
1619 {
1620 /* h->dynindx may be -1 if this symbol was marked to
1621 become local. */
1622 if (hh == NULL
1623 || ((info->symbolic || hh->eh.dynindx == -1)
1624 && hh->eh.def_regular))
1625 {
1626 relocate = TRUE;
1627 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1628 outrel.r_addend = relocation + rel->r_addend;
1629 }
1630 else
1631 {
1632 BFD_ASSERT (hh->eh.dynindx != -1);
1633 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1634 outrel.r_addend = rel->r_addend;
1635 }
1636 }
1637
1638 loc = sreloc->contents;
1639 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1640 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1641 ++sreloc->reloc_count;
1642
1643 /* If this reloc is against an external symbol, we do
1644 not want to fiddle with the addend. Otherwise, we
1645 need to include the symbol value so that it becomes
1646 an addend for the dynamic reloc. */
1647 if (! relocate)
1648 continue;
1649 }
1650 break;
1651
1652 case R_METAG_RELBRANCH_PLT:
1653 /* Relocation is to the entry for this symbol in the
1654 procedure linkage table. */
1655
1656 if (hh == NULL)
1657 break;
1658
1659 if (hh->eh.forced_local)
1660 break;
1661
1662 if (hh->eh.plt.offset == (bfd_vma) -1 || htab->etab.splt == NULL)
1663 {
1664 /* We didn't make a PLT entry for this symbol. This
1665 happens when statically linking PIC code, or when
1666 using -Bsymbolic. */
1667 break;
1668 }
1669
1670 relocation = (htab->etab.splt->output_section->vma
1671 + htab->etab.splt->output_offset
1672 + hh->eh.plt.offset);
1673 break;
1674 case R_METAG_HI16_GOTPC:
1675 case R_METAG_LO16_GOTPC:
1676 BFD_ASSERT (htab->etab.sgot != NULL);
1677
1678 relocation = (htab->etab.sgot->output_section->vma +
1679 htab->etab.sgot->output_offset);
1680 relocation += GOT_REG_OFFSET;
1681 relocation -= (input_section->output_section->vma
1682 + input_section->output_offset
1683 + rel->r_offset);
1684 break;
1685 case R_METAG_HI16_GOTOFF:
1686 case R_METAG_LO16_GOTOFF:
1687 case R_METAG_GETSET_GOTOFF:
1688 BFD_ASSERT (htab->etab.sgot != NULL);
1689
1690 relocation -= (htab->etab.sgot->output_section->vma +
1691 htab->etab.sgot->output_offset);
1692 relocation -= GOT_REG_OFFSET;
1693 break;
1694 case R_METAG_GETSET_GOT:
1695 {
1696 bfd_vma off;
1697 bfd_boolean do_got = 0;
1698
1699 /* Relocation is to the entry for this symbol in the
1700 global offset table. */
1701 if (hh != NULL)
1702 {
1703 bfd_boolean dyn;
1704
1705 off = hh->eh.got.offset;
1706 dyn = htab->etab.dynamic_sections_created;
1707 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1708 bfd_link_pic (info),
1709 &hh->eh))
1710 {
1711 /* If we aren't going to call finish_dynamic_symbol,
1712 then we need to handle initialisation of the .got
1713 entry and create needed relocs here. Since the
1714 offset must always be a multiple of 4, we use the
1715 least significant bit to record whether we have
1716 initialised it already. */
1717 if ((off & 1) != 0)
1718 off &= ~1;
1719 else
1720 {
1721 hh->eh.got.offset |= 1;
1722 do_got = 1;
1723 }
1724 }
1725 }
1726 else
1727 {
1728 /* Local symbol case. */
1729 if (local_got_offsets == NULL)
1730 abort ();
1731
1732 off = local_got_offsets[r_symndx];
1733
1734 /* The offset must always be a multiple of 4. We use
1735 the least significant bit to record whether we have
1736 already generated the necessary reloc. */
1737 if ((off & 1) != 0)
1738 off &= ~1;
1739 else
1740 {
1741 local_got_offsets[r_symndx] |= 1;
1742 do_got = 1;
1743 }
1744 }
1745
1746 if (do_got)
1747 {
1748 if (bfd_link_pic (info))
1749 {
1750 /* Output a dynamic relocation for this GOT entry.
1751 In this case it is relative to the base of the
1752 object because the symbol index is zero. */
1753 Elf_Internal_Rela outrel;
1754 bfd_byte *loc;
1755 asection *s = htab->etab.srelgot;
1756
1757 outrel.r_offset = (off
1758 + htab->etab.sgot->output_offset
1759 + htab->etab.sgot->output_section->vma);
1760 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1761 outrel.r_addend = relocation;
1762 loc = s->contents;
1763 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1764 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1765 }
1766 else
1767 bfd_put_32 (output_bfd, relocation,
1768 htab->etab.sgot->contents + off);
1769 }
1770
1771 if (off >= (bfd_vma) -2)
1772 abort ();
1773
1774 relocation = off - GOT_REG_OFFSET;
1775 }
1776 break;
1777 case R_METAG_TLS_GD:
1778 case R_METAG_TLS_IE:
1779 {
1780 /* XXXMJF There is room here for optimisations. For example
1781 converting from GD->IE, etc. */
1782 bfd_vma off;
1783 int indx;
1784 char tls_type;
1785
1786 if (htab->etab.sgot == NULL)
1787 abort();
1788
1789 indx = 0;
1790 if (hh != NULL)
1791 {
1792 bfd_boolean dyn;
1793 dyn = htab->etab.dynamic_sections_created;
1794
1795 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1796 bfd_link_pic (info),
1797 &hh->eh)
1798 && (!bfd_link_pic (info)
1799 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1800 {
1801 indx = hh->eh.dynindx;
1802 }
1803 off = hh->eh.got.offset;
1804 tls_type = hh->tls_type;
1805 }
1806 else
1807 {
1808 /* Local symbol case. */
1809 if (local_got_offsets == NULL)
1810 abort ();
1811
1812 off = local_got_offsets[r_symndx];
1813 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1814 }
1815
1816 if (tls_type == GOT_UNKNOWN)
1817 abort ();
1818
1819 if ((off & 1) != 0)
1820 off &= ~1;
1821 else
1822 {
1823 bfd_boolean need_relocs = FALSE;
1824 Elf_Internal_Rela outrel;
1825 bfd_byte *loc = NULL;
1826 int cur_off = off;
1827
1828 /* The GOT entries have not been initialized yet. Do it
1829 now, and emit any relocations. If both an IE GOT and a
1830 GD GOT are necessary, we emit the GD first. */
1831
1832 if ((bfd_link_pic (info) || indx != 0)
1833 && (hh == NULL
1834 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1835 || hh->eh.root.type != bfd_link_hash_undefweak))
1836 {
1837 need_relocs = TRUE;
1838 loc = htab->etab.srelgot->contents;
1839 /* FIXME (CAO): Should this be reloc_count++ ? */
1840 loc += htab->etab.srelgot->reloc_count * sizeof (Elf32_External_Rela);
1841 }
1842
1843 if (tls_type & GOT_TLS_GD)
1844 {
1845 if (need_relocs)
1846 {
1847 outrel.r_offset = (cur_off
1848 + htab->etab.sgot->output_section->vma
1849 + htab->etab.sgot->output_offset);
1850 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1851 outrel.r_addend = 0;
1852 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + cur_off);
1853
1854 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1855 htab->etab.srelgot->reloc_count++;
1856 loc += sizeof (Elf32_External_Rela);
1857
1858 if (indx == 0)
1859 bfd_put_32 (output_bfd, 0,
1860 htab->etab.sgot->contents + cur_off + 4);
1861 else
1862 {
1863 bfd_put_32 (output_bfd, 0,
1864 htab->etab.sgot->contents + cur_off + 4);
1865 outrel.r_info = ELF32_R_INFO (indx,
1866 R_METAG_TLS_DTPOFF);
1867 outrel.r_offset += 4;
1868 bfd_elf32_swap_reloca_out (output_bfd,
1869 &outrel, loc);
1870 htab->etab.srelgot->reloc_count++;
1871 loc += sizeof (Elf32_External_Rela);
1872 }
1873 }
1874 else
1875 {
1876 /* We don't support changing the TLS model. */
1877 /* PR 20675 */
1878 if (bfd_link_pic (info))
1879 _bfd_error_handler (_("%B(%A): multiple TLS models are not supported"),
1880 input_bfd, input_section, name);
1881 else
1882 _bfd_error_handler (_("%B(%A): shared library symbol %s encountered whilst performing a static link"),
1883 input_bfd, input_section, name);
1884 return FALSE;
1885 }
1886
1887 cur_off += 8;
1888 }
1889
1890 if (tls_type & GOT_TLS_IE)
1891 {
1892 if (need_relocs)
1893 {
1894 outrel.r_offset = (cur_off
1895 + htab->etab.sgot->output_section->vma
1896 + htab->etab.sgot->output_offset);
1897 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1898
1899 if (indx == 0)
1900 outrel.r_addend = relocation - dtpoff_base (info);
1901 else
1902 outrel.r_addend = 0;
1903
1904 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1905 htab->etab.srelgot->reloc_count++;
1906 loc += sizeof (Elf32_External_Rela);
1907 }
1908 else
1909 bfd_put_32 (output_bfd, tpoff (info, relocation),
1910 htab->etab.sgot->contents + cur_off);
1911
1912 cur_off += 4;
1913 }
1914
1915 if (hh != NULL)
1916 hh->eh.got.offset |= 1;
1917 else
1918 local_got_offsets[r_symndx] |= 1;
1919 }
1920
1921 /* Add the base of the GOT to the relocation value. */
1922 relocation = off - GOT_REG_OFFSET;
1923
1924 break;
1925 }
1926
1927 case R_METAG_TLS_IENONPIC_HI16:
1928 case R_METAG_TLS_IENONPIC_LO16:
1929 case R_METAG_TLS_LE_HI16:
1930 case R_METAG_TLS_LE_LO16:
1931 if (bfd_link_pic (info))
1932 {
1933 _bfd_error_handler
1934 /* xgettext:c-format */
1935 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1936 input_bfd, input_section,
1937 (long) rel->r_offset, howto->name);
1938 return FALSE;
1939 }
1940 else
1941 relocation = tpoff (info, relocation);
1942 break;
1943 case R_METAG_TLS_LDO_HI16:
1944 case R_METAG_TLS_LDO_LO16:
1945 if (! bfd_link_pic (info))
1946 relocation = tpoff (info, relocation);
1947 else
1948 relocation -= dtpoff_base (info);
1949 break;
1950 case R_METAG_TLS_LDM:
1951 {
1952 bfd_vma off;
1953
1954 if (htab->etab.sgot == NULL)
1955 abort();
1956 off = htab->tls_ldm_got.offset;
1957 if (off & 1)
1958 off &= ~1;
1959 else
1960 {
1961 Elf_Internal_Rela outrel;
1962 bfd_byte *loc;
1963
1964 outrel.r_offset = (off
1965 + htab->etab.sgot->output_section->vma
1966 + htab->etab.sgot->output_offset);
1967
1968 outrel.r_addend = 0;
1969 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1970 loc = htab->etab.srelgot->contents;
1971 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1972 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1973 htab->tls_ldm_got.offset |= 1;
1974 }
1975
1976 relocation = off - GOT_REG_OFFSET;
1977 break;
1978 }
1979 default:
1980 break;
1981 }
1982
1983 r = metag_final_link_relocate (howto, input_bfd, input_section,
1984 contents, rel, relocation, hh, htab,
1985 sec);
1986
1987 if (r != bfd_reloc_ok)
1988 {
1989 const char * msg = (const char *) NULL;
1990
1991 switch (r)
1992 {
1993 case bfd_reloc_overflow:
1994 (*info->callbacks->reloc_overflow)
1995 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1996 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1997 break;
1998
1999 case bfd_reloc_undefined:
2000 (*info->callbacks->undefined_symbol)
2001 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
2002 break;
2003
2004 case bfd_reloc_outofrange:
2005 msg = _("internal error: out of range error");
2006 break;
2007
2008 case bfd_reloc_notsupported:
2009 msg = _("internal error: unsupported relocation error");
2010 break;
2011
2012 case bfd_reloc_dangerous:
2013 msg = _("internal error: dangerous relocation");
2014 break;
2015
2016 default:
2017 msg = _("internal error: unknown error");
2018 break;
2019 }
2020
2021 if (msg)
2022 (*info->callbacks->warning) (info, msg, name, input_bfd,
2023 input_section, rel->r_offset);
2024 }
2025 }
2026
2027 return TRUE;
2028 }
2029
2030 /* Create the .plt and .got sections, and set up our hash table
2031 short-cuts to various dynamic sections. */
2032
2033 static bfd_boolean
2034 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2035 {
2036 struct elf_metag_link_hash_table *htab;
2037 struct elf_link_hash_entry *eh;
2038 struct bfd_link_hash_entry *bh;
2039 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2040
2041 /* Don't try to create the .plt and .got twice. */
2042 htab = metag_link_hash_table (info);
2043 if (htab->etab.splt != NULL)
2044 return TRUE;
2045
2046 /* Call the generic code to do most of the work. */
2047 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2048 return FALSE;
2049
2050 /* The header goes at the start of the dynamic .got section, which
2051 is placed after the dynamic .got.plt section. ie. The header is
2052 not necessarily at the start of the output .got section. */
2053 htab->etab.sgot->size += 12;
2054
2055 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
2056 bh = NULL;
2057 if (!(_bfd_generic_link_add_one_symbol
2058 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->etab.sgot,
2059 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2060 return FALSE;
2061 eh = (struct elf_link_hash_entry *) bh;
2062 eh->def_regular = 1;
2063 eh->type = STT_OBJECT;
2064 eh->other = STV_HIDDEN;
2065
2066 if (! bfd_link_executable (info)
2067 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2068 return FALSE;
2069
2070 htab->etab.hgot = eh;
2071
2072 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
2073 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
2074
2075 return TRUE;
2076 }
2077
2078 /* Look through the relocs for a section during the first phase, and
2079 calculate needed space in the global offset table, procedure linkage
2080 table, and dynamic reloc sections. At this point we haven't
2081 necessarily read all the input files. */
2082
2083 static bfd_boolean
2084 elf_metag_check_relocs (bfd *abfd,
2085 struct bfd_link_info *info,
2086 asection *sec,
2087 const Elf_Internal_Rela *relocs)
2088 {
2089 Elf_Internal_Shdr *symtab_hdr;
2090 struct elf_link_hash_entry **eh_syms;
2091 const Elf_Internal_Rela *rel;
2092 const Elf_Internal_Rela *rel_end;
2093 struct elf_metag_link_hash_table *htab;
2094 asection *sreloc;
2095 bfd *dynobj;
2096 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2097
2098 if (bfd_link_relocatable (info))
2099 return TRUE;
2100
2101 htab = metag_link_hash_table (info);
2102 dynobj = htab->etab.dynobj;
2103 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2104 eh_syms = elf_sym_hashes (abfd);
2105 sreloc = NULL;
2106
2107 if (htab == NULL)
2108 return FALSE;
2109
2110 rel_end = relocs + sec->reloc_count;
2111 for (rel = relocs; rel < rel_end; rel++)
2112 {
2113 int r_type;
2114 struct elf_metag_link_hash_entry *hh;
2115 Elf_Internal_Sym *isym;
2116 unsigned long r_symndx;
2117
2118 r_symndx = ELF32_R_SYM (rel->r_info);
2119 r_type = ELF32_R_TYPE (rel->r_info);
2120 if (r_symndx < symtab_hdr->sh_info)
2121 {
2122 /* A local symbol. */
2123 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2124 abfd, r_symndx);
2125 if (isym == NULL)
2126 return FALSE;
2127
2128 hh = NULL;
2129 }
2130 else
2131 {
2132 isym = NULL;
2133
2134 hh = (struct elf_metag_link_hash_entry *)
2135 eh_syms[r_symndx - symtab_hdr->sh_info];
2136 while (hh->eh.root.type == bfd_link_hash_indirect
2137 || hh->eh.root.type == bfd_link_hash_warning)
2138 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2139
2140 /* PR15323, ref flags aren't set for references in the same
2141 object. */
2142 hh->eh.root.non_ir_ref = 1;
2143 }
2144
2145 /* Some relocs require a global offset table. */
2146 if (htab->etab.sgot == NULL)
2147 {
2148 switch (r_type)
2149 {
2150 case R_METAG_TLS_GD:
2151 case R_METAG_TLS_LDM:
2152 case R_METAG_TLS_IE:
2153 if (bfd_link_pic (info))
2154 info->flags |= DF_STATIC_TLS;
2155 /* Fall through. */
2156
2157 case R_METAG_HI16_GOTOFF:
2158 case R_METAG_LO16_GOTOFF:
2159 case R_METAG_GETSET_GOTOFF:
2160 case R_METAG_GETSET_GOT:
2161 case R_METAG_HI16_GOTPC:
2162 case R_METAG_LO16_GOTPC:
2163 if (dynobj == NULL)
2164 htab->etab.dynobj = dynobj = abfd;
2165 if (!elf_metag_create_dynamic_sections (dynobj, info))
2166 return FALSE;
2167 break;
2168
2169 default:
2170 break;
2171 }
2172 }
2173
2174 switch (r_type)
2175 {
2176 case R_METAG_TLS_IE:
2177 case R_METAG_TLS_GD:
2178 case R_METAG_GETSET_GOT:
2179 switch (r_type)
2180 {
2181 default:
2182 tls_type = GOT_NORMAL;
2183 break;
2184 case R_METAG_TLS_IE:
2185 tls_type = GOT_TLS_IE;
2186 break;
2187 case R_METAG_TLS_GD:
2188 tls_type = GOT_TLS_GD;
2189 break;
2190 }
2191
2192 if (hh != NULL)
2193 {
2194 hh->eh.got.refcount += 1;
2195 old_tls_type = hh->tls_type;
2196 }
2197 else
2198 {
2199 bfd_signed_vma *local_got_refcounts;
2200
2201 /* This is a global offset table entry for a local
2202 symbol. */
2203 local_got_refcounts = elf_local_got_refcounts (abfd);
2204 if (local_got_refcounts == NULL)
2205 {
2206 bfd_size_type size;
2207
2208 size = symtab_hdr->sh_info;
2209 size *= sizeof (bfd_signed_vma);
2210 /* Add in space to store the local GOT TLS types. */
2211 size += symtab_hdr->sh_info;
2212 local_got_refcounts = ((bfd_signed_vma *)
2213 bfd_zalloc (abfd, size));
2214 if (local_got_refcounts == NULL)
2215 return FALSE;
2216 elf_local_got_refcounts (abfd) = local_got_refcounts;
2217 memset (metag_elf_local_got_tls_type (abfd),
2218 GOT_UNKNOWN, symtab_hdr->sh_info);
2219 }
2220 local_got_refcounts[r_symndx] += 1;
2221 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2222 }
2223
2224 if (old_tls_type != tls_type)
2225 {
2226 if (hh != NULL)
2227 {
2228 hh->tls_type = tls_type;
2229 }
2230 else
2231 {
2232 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2233 }
2234 }
2235
2236 break;
2237
2238 case R_METAG_TLS_LDM:
2239 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2240 break;
2241
2242 case R_METAG_RELBRANCH_PLT:
2243 /* This symbol requires a procedure linkage table entry. We
2244 actually build the entry in adjust_dynamic_symbol,
2245 because this might be a case of linking PIC code without
2246 linking in any dynamic objects, in which case we don't
2247 need to generate a procedure linkage table after all. */
2248
2249 /* If this is a local symbol, we resolve it directly without
2250 creating a procedure linkage table entry. */
2251 if (hh == NULL)
2252 continue;
2253
2254 if (hh->eh.forced_local)
2255 break;
2256
2257 hh->eh.needs_plt = 1;
2258 hh->eh.plt.refcount += 1;
2259 break;
2260
2261 case R_METAG_HIADDR16:
2262 case R_METAG_LOADDR16:
2263 /* Let's help debug shared library creation. These relocs
2264 cannot be used in shared libs. Don't error out for
2265 sections we don't care about, such as debug sections or
2266 non-constant sections. */
2267 if (bfd_link_pic (info)
2268 && (sec->flags & SEC_ALLOC) != 0
2269 && (sec->flags & SEC_READONLY) != 0)
2270 {
2271 const char *name;
2272
2273 if (hh)
2274 name = hh->eh.root.root.string;
2275 else
2276 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2277 _bfd_error_handler
2278 /* xgettext:c-format */
2279 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2280 abfd, elf_metag_howto_table[r_type].name, name);
2281 bfd_set_error (bfd_error_bad_value);
2282 return FALSE;
2283 }
2284
2285 /* Fall through. */
2286 case R_METAG_ADDR32:
2287 case R_METAG_RELBRANCH:
2288 case R_METAG_GETSETOFF:
2289 if (hh != NULL && !bfd_link_pic (info))
2290 {
2291 hh->eh.non_got_ref = 1;
2292 hh->eh.plt.refcount += 1;
2293 }
2294
2295 /* If we are creating a shared library, and this is a reloc
2296 against a global symbol, or a non PC relative reloc
2297 against a local symbol, then we need to copy the reloc
2298 into the shared library. However, if we are linking with
2299 -Bsymbolic, we do not need to copy a reloc against a
2300 global symbol which is defined in an object we are
2301 including in the link (i.e., DEF_REGULAR is set). At
2302 this point we have not seen all the input files, so it is
2303 possible that DEF_REGULAR is not set now but will be set
2304 later (it is never cleared). We account for that
2305 possibility below by storing information in the
2306 dyn_relocs field of the hash table entry. A similar
2307 situation occurs when creating shared libraries and symbol
2308 visibility changes render the symbol local.
2309
2310 If on the other hand, we are creating an executable, we
2311 may need to keep relocations for symbols satisfied by a
2312 dynamic library if we manage to avoid copy relocs for the
2313 symbol. */
2314 if ((bfd_link_pic (info)
2315 && (sec->flags & SEC_ALLOC) != 0
2316 && (r_type != R_METAG_RELBRANCH
2317 || (hh != NULL
2318 && (! info->symbolic
2319 || hh->eh.root.type == bfd_link_hash_defweak
2320 || !hh->eh.def_regular))))
2321 || (!bfd_link_pic (info)
2322 && (sec->flags & SEC_ALLOC) != 0
2323 && hh != NULL
2324 && (hh->eh.root.type == bfd_link_hash_defweak
2325 || !hh->eh.def_regular)))
2326 {
2327 struct elf_metag_dyn_reloc_entry *hdh_p;
2328 struct elf_metag_dyn_reloc_entry **hdh_head;
2329
2330 if (dynobj == NULL)
2331 htab->etab.dynobj = dynobj = abfd;
2332
2333 /* When creating a shared object, we must copy these
2334 relocs into the output file. We create a reloc
2335 section in dynobj and make room for the reloc. */
2336 if (sreloc == NULL)
2337 {
2338 sreloc = _bfd_elf_make_dynamic_reloc_section
2339 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2340
2341 if (sreloc == NULL)
2342 {
2343 bfd_set_error (bfd_error_bad_value);
2344 return FALSE;
2345 }
2346
2347 elf_section_data (sec)->sreloc = sreloc;
2348 }
2349
2350 /* If this is a global symbol, we count the number of
2351 relocations we need for this symbol. */
2352 if (hh != NULL)
2353 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2354 else
2355 {
2356 /* Track dynamic relocs needed for local syms too. */
2357 asection *sr;
2358 void *vpp;
2359
2360 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2361 if (sr == NULL)
2362 sr = sec;
2363
2364 vpp = &elf_section_data (sr)->local_dynrel;
2365 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2366 }
2367
2368 hdh_p = *hdh_head;
2369 if (hdh_p == NULL || hdh_p->sec != sec)
2370 {
2371 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2372 bfd_alloc (dynobj, sizeof *hdh_p));
2373 if (hdh_p == NULL)
2374 return FALSE;
2375 hdh_p->hdh_next = *hdh_head;
2376 *hdh_head = hdh_p;
2377 hdh_p->sec = sec;
2378 hdh_p->count = 0;
2379 hdh_p->relative_count = 0;
2380 }
2381
2382 hdh_p->count += 1;
2383 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2384 hdh_p->relative_count += 1;
2385 }
2386 break;
2387
2388 /* This relocation describes the C++ object vtable hierarchy.
2389 Reconstruct it for later use during GC. */
2390 case R_METAG_GNU_VTINHERIT:
2391 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2392 rel->r_offset))
2393 return FALSE;
2394 break;
2395
2396 /* This relocation describes which C++ vtable entries are actually
2397 used. Record for later use during GC. */
2398 case R_METAG_GNU_VTENTRY:
2399 BFD_ASSERT (hh != NULL);
2400 if (hh != NULL
2401 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2402 return FALSE;
2403 break;
2404 }
2405 }
2406
2407 return TRUE;
2408 }
2409
2410 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2411
2412 static void
2413 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2414 struct elf_link_hash_entry *eh_dir,
2415 struct elf_link_hash_entry *eh_ind)
2416 {
2417 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2418
2419 hh_dir = metag_elf_hash_entry (eh_dir);
2420 hh_ind = metag_elf_hash_entry (eh_ind);
2421
2422 if (hh_ind->dyn_relocs != NULL)
2423 {
2424 if (hh_dir->dyn_relocs != NULL)
2425 {
2426 struct elf_metag_dyn_reloc_entry **hdh_pp;
2427 struct elf_metag_dyn_reloc_entry *hdh_p;
2428
2429 if (eh_ind->root.type == bfd_link_hash_indirect)
2430 abort ();
2431
2432 /* Add reloc counts against the weak sym to the strong sym
2433 list. Merge any entries against the same section. */
2434 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2435 {
2436 struct elf_metag_dyn_reloc_entry *hdh_q;
2437
2438 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2439 hdh_q = hdh_q->hdh_next)
2440 if (hdh_q->sec == hdh_p->sec)
2441 {
2442 hdh_q->relative_count += hdh_p->relative_count;
2443 hdh_q->count += hdh_p->count;
2444 *hdh_pp = hdh_p->hdh_next;
2445 break;
2446 }
2447 if (hdh_q == NULL)
2448 hdh_pp = &hdh_p->hdh_next;
2449 }
2450 *hdh_pp = hh_dir->dyn_relocs;
2451 }
2452
2453 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2454 hh_ind->dyn_relocs = NULL;
2455 }
2456
2457 if (eh_ind->root.type == bfd_link_hash_indirect
2458 && eh_dir->got.refcount <= 0)
2459 {
2460 hh_dir->tls_type = hh_ind->tls_type;
2461 hh_ind->tls_type = GOT_UNKNOWN;
2462 }
2463
2464 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2465 }
2466
2467 /* Adjust a symbol defined by a dynamic object and referenced by a
2468 regular object. The current definition is in some section of the
2469 dynamic object, but we're not including those sections. We have to
2470 change the definition to something the rest of the link can
2471 understand. */
2472
2473 static bfd_boolean
2474 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2475 struct elf_link_hash_entry *eh)
2476 {
2477 struct elf_metag_link_hash_table *htab;
2478 struct elf_metag_link_hash_entry *hh;
2479 struct elf_metag_dyn_reloc_entry *hdh_p;
2480 asection *s;
2481
2482 /* If this is a function, put it in the procedure linkage table. We
2483 will fill in the contents of the procedure linkage table later,
2484 when we know the address of the .got section. */
2485 if (eh->type == STT_FUNC
2486 || eh->needs_plt)
2487 {
2488 if (eh->plt.refcount <= 0
2489 || SYMBOL_CALLS_LOCAL (info, eh)
2490 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2491 && eh->root.type == bfd_link_hash_undefweak))
2492 {
2493 /* This case can occur if we saw a PLT reloc in an input
2494 file, but the symbol was never referred to by a dynamic
2495 object. In such a case, we don't actually need to build
2496 a procedure linkage table, and we can just do a PCREL
2497 reloc instead. */
2498 eh->plt.offset = (bfd_vma) -1;
2499 eh->needs_plt = 0;
2500 }
2501
2502 return TRUE;
2503 }
2504 else
2505 eh->plt.offset = (bfd_vma) -1;
2506
2507 /* If this is a weak symbol, and there is a real definition, the
2508 processor independent code will have arranged for us to see the
2509 real definition first, and we can just use the same value. */
2510 if (eh->u.weakdef != NULL)
2511 {
2512 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2513 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2514 abort ();
2515 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2516 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2517 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2518 return TRUE;
2519 }
2520
2521 /* This is a reference to a symbol defined by a dynamic object which
2522 is not a function. */
2523
2524 /* If we are creating a shared library, we must presume that the
2525 only references to the symbol are via the global offset table.
2526 For such cases we need not do anything here; the relocations will
2527 be handled correctly by relocate_section. */
2528 if (bfd_link_pic (info))
2529 return TRUE;
2530
2531 /* If there are no references to this symbol that do not use the
2532 GOT, we don't need to generate a copy reloc. */
2533 if (!eh->non_got_ref)
2534 return TRUE;
2535
2536 /* If -z nocopyreloc was given, we won't generate them either. */
2537 if (info->nocopyreloc)
2538 {
2539 eh->non_got_ref = 0;
2540 return TRUE;
2541 }
2542
2543 hh = (struct elf_metag_link_hash_entry *) eh;
2544 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2545 {
2546 s = hdh_p->sec->output_section;
2547 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2548 break;
2549 }
2550
2551 /* If we didn't find any dynamic relocs in read-only sections, then
2552 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2553 if (hdh_p == NULL)
2554 {
2555 eh->non_got_ref = 0;
2556 return TRUE;
2557 }
2558
2559 /* We must allocate the symbol in our .dynbss section, which will
2560 become part of the .bss section of the executable. There will be
2561 an entry for this symbol in the .dynsym section. The dynamic
2562 object will contain position independent code, so all references
2563 from the dynamic object to this symbol will go through the global
2564 offset table. The dynamic linker will use the .dynsym entry to
2565 determine the address it must put in the global offset table, so
2566 both the dynamic object and the regular object will refer to the
2567 same memory location for the variable. */
2568
2569 htab = metag_link_hash_table (info);
2570
2571 /* We must generate a COPY reloc to tell the dynamic linker to
2572 copy the initial value out of the dynamic object and into the
2573 runtime process image. */
2574 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2575 {
2576 htab->srelbss->size += sizeof (Elf32_External_Rela);
2577 eh->needs_copy = 1;
2578 }
2579
2580 s = htab->sdynbss;
2581
2582 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
2583 }
2584
2585 /* Allocate space in .plt, .got and associated reloc sections for
2586 global syms. */
2587
2588 static bfd_boolean
2589 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2590 {
2591 struct bfd_link_info *info;
2592 struct elf_metag_link_hash_table *htab;
2593 struct elf_metag_link_hash_entry *hh;
2594 struct elf_metag_dyn_reloc_entry *hdh_p;
2595
2596 if (eh->root.type == bfd_link_hash_indirect)
2597 return TRUE;
2598
2599 if (eh->root.type == bfd_link_hash_warning)
2600 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2601
2602 info = inf;
2603 htab = metag_link_hash_table (info);
2604
2605 if (htab->etab.dynamic_sections_created
2606 && eh->plt.refcount > 0)
2607 {
2608 /* Make sure this symbol is output as a dynamic symbol.
2609 Undefined weak syms won't yet be marked as dynamic. */
2610 if (eh->dynindx == -1
2611 && !eh->forced_local)
2612 {
2613 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2614 return FALSE;
2615 }
2616
2617 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
2618 {
2619 asection *s = htab->etab.splt;
2620
2621 /* If this is the first .plt entry, make room for the special
2622 first entry. */
2623 if (s->size == 0)
2624 s->size += PLT_ENTRY_SIZE;
2625
2626 eh->plt.offset = s->size;
2627
2628 /* If this symbol is not defined in a regular file, and we are
2629 not generating a shared library, then set the symbol to this
2630 location in the .plt. This is required to make function
2631 pointers compare as equal between the normal executable and
2632 the shared library. */
2633 if (! bfd_link_pic (info)
2634 && !eh->def_regular)
2635 {
2636 eh->root.u.def.section = s;
2637 eh->root.u.def.value = eh->plt.offset;
2638 }
2639
2640 /* Make room for this entry. */
2641 s->size += PLT_ENTRY_SIZE;
2642
2643 /* We also need to make an entry in the .got.plt section, which
2644 will be placed in the .got section by the linker script. */
2645 htab->etab.sgotplt->size += 4;
2646
2647 /* We also need to make an entry in the .rel.plt section. */
2648 htab->etab.srelplt->size += sizeof (Elf32_External_Rela);
2649 }
2650 else
2651 {
2652 eh->plt.offset = (bfd_vma) -1;
2653 eh->needs_plt = 0;
2654 }
2655 }
2656 else
2657 {
2658 eh->plt.offset = (bfd_vma) -1;
2659 eh->needs_plt = 0;
2660 }
2661
2662 if (eh->got.refcount > 0)
2663 {
2664 asection *s;
2665 bfd_boolean dyn;
2666 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2667
2668 /* Make sure this symbol is output as a dynamic symbol.
2669 Undefined weak syms won't yet be marked as dynamic. */
2670 if (eh->dynindx == -1
2671 && !eh->forced_local)
2672 {
2673 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2674 return FALSE;
2675 }
2676
2677 s = htab->etab.sgot;
2678
2679 eh->got.offset = s->size;
2680 s->size += 4;
2681 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2682 if (tls_type == GOT_TLS_GD)
2683 s->size += 4;
2684 dyn = htab->etab.dynamic_sections_created;
2685 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2686 R_METAG_TLS_GD needs one if local symbol and two if global. */
2687 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2688 || (tls_type == GOT_TLS_IE && dyn))
2689 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2690 else if (tls_type == GOT_TLS_GD)
2691 htab->etab.srelgot->size += 2 * sizeof (Elf32_External_Rela);
2692 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2693 bfd_link_pic (info),
2694 eh))
2695 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2696 }
2697 else
2698 eh->got.offset = (bfd_vma) -1;
2699
2700 hh = (struct elf_metag_link_hash_entry *) eh;
2701 if (hh->dyn_relocs == NULL)
2702 return TRUE;
2703
2704 /* If this is a -Bsymbolic shared link, then we need to discard all
2705 space allocated for dynamic pc-relative relocs against symbols
2706 defined in a regular object. For the normal shared case, discard
2707 space for relocs that have become local due to symbol visibility
2708 changes. */
2709 if (bfd_link_pic (info))
2710 {
2711 if (SYMBOL_CALLS_LOCAL (info, eh))
2712 {
2713 struct elf_metag_dyn_reloc_entry **hdh_pp;
2714
2715 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2716 {
2717 hdh_p->count -= hdh_p->relative_count;
2718 hdh_p->relative_count = 0;
2719 if (hdh_p->count == 0)
2720 *hdh_pp = hdh_p->hdh_next;
2721 else
2722 hdh_pp = &hdh_p->hdh_next;
2723 }
2724 }
2725
2726 /* Also discard relocs on undefined weak syms with non-default
2727 visibility. */
2728 if (hh->dyn_relocs != NULL
2729 && eh->root.type == bfd_link_hash_undefweak)
2730 {
2731 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2732 hh->dyn_relocs = NULL;
2733
2734 /* Make sure undefined weak symbols are output as a dynamic
2735 symbol in PIEs. */
2736 else if (eh->dynindx == -1
2737 && !eh->forced_local)
2738 {
2739 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2740 return FALSE;
2741 }
2742 }
2743 }
2744 else
2745 {
2746 /* For the non-shared case, discard space for relocs against
2747 symbols which turn out to need copy relocs or are not
2748 dynamic. */
2749 if (!eh->non_got_ref
2750 && ((eh->def_dynamic
2751 && !eh->def_regular)
2752 || (htab->etab.dynamic_sections_created
2753 && (eh->root.type == bfd_link_hash_undefweak
2754 || eh->root.type == bfd_link_hash_undefined))))
2755 {
2756 /* Make sure this symbol is output as a dynamic symbol.
2757 Undefined weak syms won't yet be marked as dynamic. */
2758 if (eh->dynindx == -1
2759 && !eh->forced_local)
2760 {
2761 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2762 return FALSE;
2763 }
2764
2765 /* If that succeeded, we know we'll be keeping all the
2766 relocs. */
2767 if (eh->dynindx != -1)
2768 goto keep;
2769 }
2770
2771 hh->dyn_relocs = NULL;
2772 return TRUE;
2773
2774 keep: ;
2775 }
2776
2777 /* Finally, allocate space. */
2778 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2779 {
2780 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2781 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2782 }
2783
2784 return TRUE;
2785 }
2786
2787 /* Find any dynamic relocs that apply to read-only sections. */
2788
2789 static bfd_boolean
2790 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2791 {
2792 struct elf_metag_link_hash_entry *hh;
2793 struct elf_metag_dyn_reloc_entry *hdh_p;
2794
2795 if (eh->root.type == bfd_link_hash_warning)
2796 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2797
2798 hh = (struct elf_metag_link_hash_entry *) eh;
2799 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2800 {
2801 asection *s = hdh_p->sec->output_section;
2802
2803 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2804 {
2805 struct bfd_link_info *info = inf;
2806
2807 info->flags |= DF_TEXTREL;
2808
2809 /* Not an error, just cut short the traversal. */
2810 return FALSE;
2811 }
2812 }
2813 return TRUE;
2814 }
2815
2816 /* Set the sizes of the dynamic sections. */
2817
2818 static bfd_boolean
2819 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2820 struct bfd_link_info *info)
2821 {
2822 struct elf_metag_link_hash_table *htab;
2823 bfd *dynobj;
2824 bfd *ibfd;
2825 asection *s;
2826 bfd_boolean relocs;
2827
2828 htab = metag_link_hash_table (info);
2829 dynobj = htab->etab.dynobj;
2830 if (dynobj == NULL)
2831 abort ();
2832
2833 if (htab->etab.dynamic_sections_created)
2834 {
2835 /* Set the contents of the .interp section to the interpreter. */
2836 if (bfd_link_executable (info) && !info->nointerp)
2837 {
2838 s = bfd_get_linker_section (dynobj, ".interp");
2839 if (s == NULL)
2840 abort ();
2841 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2842 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2843 }
2844 }
2845
2846 /* Set up .got offsets for local syms, and space for local dynamic
2847 relocs. */
2848 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2849 {
2850 bfd_signed_vma *local_got;
2851 bfd_signed_vma *end_local_got;
2852 bfd_size_type locsymcount;
2853 Elf_Internal_Shdr *symtab_hdr;
2854 asection *srel;
2855 char *local_tls_type;
2856
2857 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2858 continue;
2859
2860 for (s = ibfd->sections; s != NULL; s = s->next)
2861 {
2862 struct elf_metag_dyn_reloc_entry *hdh_p;
2863
2864 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2865 elf_section_data (s)->local_dynrel);
2866 hdh_p != NULL;
2867 hdh_p = hdh_p->hdh_next)
2868 {
2869 if (!bfd_is_abs_section (hdh_p->sec)
2870 && bfd_is_abs_section (hdh_p->sec->output_section))
2871 {
2872 /* Input section has been discarded, either because
2873 it is a copy of a linkonce section or due to
2874 linker script /DISCARD/, so we'll be discarding
2875 the relocs too. */
2876 }
2877 else if (hdh_p->count != 0)
2878 {
2879 srel = elf_section_data (hdh_p->sec)->sreloc;
2880 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2881 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2882 info->flags |= DF_TEXTREL;
2883 }
2884 }
2885 }
2886
2887 local_got = elf_local_got_refcounts (ibfd);
2888 if (!local_got)
2889 continue;
2890
2891 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2892 locsymcount = symtab_hdr->sh_info;
2893 end_local_got = local_got + locsymcount;
2894 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2895 s = htab->etab.sgot;
2896 srel = htab->etab.srelgot;
2897 for (; local_got < end_local_got; ++local_got)
2898 {
2899 if (*local_got > 0)
2900 {
2901 *local_got = s->size;
2902 s->size += GOT_ENTRY_SIZE;
2903 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2904 if (*local_tls_type == GOT_TLS_GD)
2905 s->size += 4;
2906 if (bfd_link_pic (info))
2907 srel->size += sizeof (Elf32_External_Rela);
2908 }
2909 else
2910 *local_got = (bfd_vma) -1;
2911 ++local_tls_type;
2912 }
2913 }
2914
2915 if (htab->tls_ldm_got.refcount > 0)
2916 {
2917 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2918 reloc. */
2919 htab->tls_ldm_got.offset = htab->etab.sgot->size;
2920 htab->etab.sgot->size += 8;
2921 htab->etab.srelgot->size += sizeof (Elf32_External_Rela);
2922 }
2923 else
2924 htab->tls_ldm_got.offset = -1;
2925
2926 /* Allocate global sym .plt and .got entries, and space for global
2927 sym dynamic relocs. */
2928 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2929
2930 /* We now have determined the sizes of the various dynamic sections.
2931 Allocate memory for them. */
2932 relocs = FALSE;
2933 for (s = dynobj->sections; s != NULL; s = s->next)
2934 {
2935 bfd_boolean reloc_section = FALSE;
2936
2937 if ((s->flags & SEC_LINKER_CREATED) == 0)
2938 continue;
2939
2940 if (s == htab->etab.splt
2941 || s == htab->etab.sgot
2942 || s == htab->etab.sgotplt
2943 || s == htab->sdynbss)
2944 {
2945 /* Strip this section if we don't need it; see the
2946 comment below. */
2947 }
2948 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2949 {
2950 if (s->size != 0 && s != htab->etab.srelplt)
2951 relocs = TRUE;
2952
2953 /* We use the reloc_count field as a counter if we need
2954 to copy relocs into the output file. */
2955 s->reloc_count = 0;
2956 reloc_section = TRUE;
2957 }
2958 else
2959 {
2960 /* It's not one of our sections, so don't allocate space. */
2961 continue;
2962 }
2963
2964 if (s->size == 0)
2965 {
2966 /* If we don't need this section, strip it from the
2967 output file. This is mostly to handle .rela.bss and
2968 .rela.plt. We must create both sections in
2969 create_dynamic_sections, because they must be created
2970 before the linker maps input sections to output
2971 sections. The linker does that before
2972 adjust_dynamic_symbol is called, and it is that
2973 function which decides whether anything needs to go
2974 into these sections. */
2975 s->flags |= SEC_EXCLUDE;
2976 continue;
2977 }
2978
2979 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2980 continue;
2981
2982 /* Allocate memory for the section contents. */
2983 s->contents = bfd_zalloc (dynobj, s->size);
2984 if (s->contents == NULL)
2985 return FALSE;
2986 else if (reloc_section)
2987 {
2988 unsigned char *contents = s->contents;
2989 Elf32_External_Rela reloc;
2990
2991 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2992 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2993 reloc.r_info[0] = R_METAG_NONE;
2994 for (; contents < (s->contents + s->size);
2995 contents += sizeof(Elf32_External_Rela))
2996 {
2997 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
2998 }
2999 }
3000 }
3001
3002 if (htab->etab.dynamic_sections_created)
3003 {
3004 /* Add some entries to the .dynamic section. We fill in the
3005 values later, in elf_metag_finish_dynamic_sections, but we
3006 must add the entries now so that we get the correct size for
3007 the .dynamic section. The DT_DEBUG entry is filled in by the
3008 dynamic linker and used by the debugger. */
3009 #define add_dynamic_entry(TAG, VAL) \
3010 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3011
3012 if (!add_dynamic_entry (DT_PLTGOT, 0))
3013 return FALSE;
3014
3015 if (bfd_link_executable (info))
3016 {
3017 if (!add_dynamic_entry (DT_DEBUG, 0))
3018 return FALSE;
3019 }
3020
3021 if (htab->etab.srelplt->size != 0)
3022 {
3023 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3024 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3025 || !add_dynamic_entry (DT_JMPREL, 0))
3026 return FALSE;
3027 }
3028
3029 if (relocs)
3030 {
3031 if (!add_dynamic_entry (DT_RELA, 0)
3032 || !add_dynamic_entry (DT_RELASZ, 0)
3033 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3034 return FALSE;
3035
3036 /* If any dynamic relocs apply to a read-only section,
3037 then we need a DT_TEXTREL entry. */
3038 if ((info->flags & DF_TEXTREL) == 0)
3039 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3040
3041 if ((info->flags & DF_TEXTREL) != 0)
3042 {
3043 if (!add_dynamic_entry (DT_TEXTREL, 0))
3044 return FALSE;
3045 }
3046 }
3047 }
3048 #undef add_dynamic_entry
3049
3050 return TRUE;
3051 }
3052
3053 /* Finish up dynamic symbol handling. We set the contents of various
3054 dynamic sections here. */
3055
3056 static bfd_boolean
3057 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3058 struct bfd_link_info *info,
3059 struct elf_link_hash_entry *eh,
3060 Elf_Internal_Sym *sym)
3061 {
3062 struct elf_metag_link_hash_table *htab;
3063 Elf_Internal_Rela rel;
3064 bfd_byte *loc;
3065
3066 htab = metag_link_hash_table (info);
3067
3068 if (eh->plt.offset != (bfd_vma) -1)
3069 {
3070 asection *splt;
3071 asection *sgot;
3072 asection *srela;
3073
3074 bfd_vma plt_index;
3075 bfd_vma got_offset;
3076 bfd_vma got_entry;
3077
3078 if (eh->plt.offset & 1)
3079 abort ();
3080
3081 BFD_ASSERT (eh->dynindx != -1);
3082
3083 splt = htab->etab.splt;
3084 sgot = htab->etab.sgotplt;
3085 srela = htab->etab.srelplt;
3086 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3087
3088 /* Get the index in the procedure linkage table which
3089 corresponds to this symbol. This is the index of this symbol
3090 in all the symbols for which we are making plt entries. The
3091 first entry in the procedure linkage table is reserved. */
3092 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3093
3094 /* Get the offset into the .got.plt table of the entry that
3095 corresponds to this function. */
3096 got_offset = plt_index * GOT_ENTRY_SIZE;
3097
3098 BFD_ASSERT (got_offset < (1 << 16));
3099
3100 got_entry = sgot->output_section->vma
3101 + sgot->output_offset
3102 + got_offset;
3103
3104 BFD_ASSERT (plt_index < (1 << 16));
3105
3106 /* Fill in the entry in the procedure linkage table. */
3107 if (! bfd_link_pic (info))
3108 {
3109 bfd_put_32 (output_bfd,
3110 (plt_entry[0]
3111 | (((got_entry >> 16) & 0xffff) << 3)),
3112 splt->contents + eh->plt.offset);
3113 bfd_put_32 (output_bfd,
3114 (plt_entry[1]
3115 | ((got_entry & 0xffff) << 3)),
3116 splt->contents + eh->plt.offset + 4);
3117 bfd_put_32 (output_bfd, plt_entry[2],
3118 splt->contents + eh->plt.offset + 8);
3119 bfd_put_32 (output_bfd,
3120 (plt_entry[3] | (plt_index << 3)),
3121 splt->contents + eh->plt.offset + 12);
3122 bfd_put_32 (output_bfd,
3123 (plt_entry[4]
3124 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3125 splt->contents + eh->plt.offset + 16);
3126 }
3127 else
3128 {
3129 bfd_vma addr = got_entry - (splt->output_section->vma +
3130 splt->output_offset + eh->plt.offset);
3131
3132 bfd_put_32 (output_bfd,
3133 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3134 splt->contents + eh->plt.offset);
3135 bfd_put_32 (output_bfd,
3136 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3137 splt->contents + eh->plt.offset + 4);
3138 bfd_put_32 (output_bfd, plt_pic_entry[2],
3139 splt->contents + eh->plt.offset + 8);
3140 bfd_put_32 (output_bfd,
3141 (plt_pic_entry[3] | (plt_index << 3)),
3142 splt->contents + eh->plt.offset + 12);
3143 bfd_put_32 (output_bfd,
3144 (plt_pic_entry[4]
3145 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3146 splt->contents + eh->plt.offset + 16);
3147 }
3148
3149 /* Fill in the entry in the global offset table. */
3150 bfd_put_32 (output_bfd,
3151 (splt->output_section->vma
3152 + splt->output_offset
3153 + eh->plt.offset
3154 + 12), /* offset within PLT entry */
3155 sgot->contents + got_offset);
3156
3157 /* Fill in the entry in the .rela.plt section. */
3158 rel.r_offset = (sgot->output_section->vma
3159 + sgot->output_offset
3160 + got_offset);
3161 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3162 rel.r_addend = 0;
3163 loc = htab->etab.srelplt->contents;
3164 loc += plt_index * sizeof(Elf32_External_Rela);
3165 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3166
3167 if (!eh->def_regular)
3168 {
3169 /* Mark the symbol as undefined, rather than as defined in
3170 the .plt section. Leave the value alone. */
3171 sym->st_shndx = SHN_UNDEF;
3172 }
3173 }
3174
3175 if (eh->got.offset != (bfd_vma) -1
3176 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3177 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3178 {
3179 /* This symbol has an entry in the global offset table. Set it
3180 up. */
3181
3182 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3183 + htab->etab.sgot->output_offset
3184 + htab->etab.sgot->output_section->vma);
3185
3186 /* If this is a -Bsymbolic link and the symbol is defined
3187 locally or was forced to be local because of a version file,
3188 we just want to emit a RELATIVE reloc. The entry in the
3189 global offset table will already have been initialized in the
3190 relocate_section function. */
3191 if (bfd_link_pic (info)
3192 && (info->symbolic || eh->dynindx == -1)
3193 && eh->def_regular)
3194 {
3195 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3196 rel.r_addend = (eh->root.u.def.value
3197 + eh->root.u.def.section->output_offset
3198 + eh->root.u.def.section->output_section->vma);
3199 }
3200 else
3201 {
3202 if ((eh->got.offset & 1) != 0)
3203 abort ();
3204 bfd_put_32 (output_bfd, 0, htab->etab.sgot->contents + eh->got.offset);
3205 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3206 rel.r_addend = 0;
3207 }
3208
3209 loc = htab->etab.srelgot->contents;
3210 loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3211 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3212 }
3213
3214 if (eh->needs_copy)
3215 {
3216 asection *s;
3217
3218 /* This symbol needs a copy reloc. Set it up. */
3219
3220 if (! (eh->dynindx != -1
3221 && (eh->root.type == bfd_link_hash_defined
3222 || eh->root.type == bfd_link_hash_defweak)))
3223 abort ();
3224
3225 s = htab->srelbss;
3226
3227 rel.r_offset = (eh->root.u.def.value
3228 + eh->root.u.def.section->output_offset
3229 + eh->root.u.def.section->output_section->vma);
3230 rel.r_addend = 0;
3231 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3232 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3233 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3234 }
3235
3236 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3237 if (eh->root.root.string[0] == '_'
3238 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3239 || eh == htab->etab.hgot))
3240 {
3241 sym->st_shndx = SHN_ABS;
3242 }
3243
3244 return TRUE;
3245 }
3246
3247 /* Set the Meta ELF ABI version. */
3248
3249 static void
3250 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
3251 {
3252 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3253
3254 _bfd_elf_post_process_headers (abfd, link_info);
3255 i_ehdrp = elf_elfheader (abfd);
3256 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3257 }
3258
3259 /* Used to decide how to sort relocs in an optimal manner for the
3260 dynamic linker, before writing them out. */
3261
3262 static enum elf_reloc_type_class
3263 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3264 const asection *rel_sec ATTRIBUTE_UNUSED,
3265 const Elf_Internal_Rela *rela)
3266 {
3267 switch ((int) ELF32_R_TYPE (rela->r_info))
3268 {
3269 case R_METAG_RELATIVE:
3270 return reloc_class_relative;
3271 case R_METAG_JMP_SLOT:
3272 return reloc_class_plt;
3273 case R_METAG_COPY:
3274 return reloc_class_copy;
3275 default:
3276 return reloc_class_normal;
3277 }
3278 }
3279
3280 /* Finish up the dynamic sections. */
3281
3282 static bfd_boolean
3283 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3284 struct bfd_link_info *info)
3285 {
3286 bfd *dynobj;
3287 struct elf_metag_link_hash_table *htab;
3288 asection *sdyn;
3289
3290 htab = metag_link_hash_table (info);
3291 dynobj = htab->etab.dynobj;
3292
3293 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3294
3295 if (htab->etab.dynamic_sections_created)
3296 {
3297 asection *splt;
3298 Elf32_External_Dyn *dyncon, *dynconend;
3299
3300 if (sdyn == NULL)
3301 abort ();
3302
3303 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3304 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3305 for (; dyncon < dynconend; dyncon++)
3306 {
3307 Elf_Internal_Dyn dyn;
3308 asection *s;
3309
3310 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3311
3312 switch (dyn.d_tag)
3313 {
3314 default:
3315 continue;
3316
3317 case DT_PLTGOT:
3318 s = htab->etab.sgot;
3319 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3320 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3321 break;
3322
3323 case DT_JMPREL:
3324 s = htab->etab.srelplt;
3325 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3326 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3327 break;
3328
3329 case DT_PLTRELSZ:
3330 s = htab->etab.srelplt;
3331 dyn.d_un.d_val = s->size;
3332 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3333 break;
3334 }
3335
3336 }
3337
3338 /* Fill in the first entry in the procedure linkage table. */
3339 splt = htab->etab.splt;
3340 if (splt && splt->size > 0)
3341 {
3342 unsigned long addr;
3343 /* addr = .got + 4 */
3344 addr = (htab->etab.sgot->output_section->vma
3345 + htab->etab.sgot->output_offset + 4);
3346 if (bfd_link_pic (info))
3347 {
3348 addr -= splt->output_section->vma + splt->output_offset;
3349 bfd_put_32 (output_bfd,
3350 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3351 splt->contents);
3352 bfd_put_32 (output_bfd,
3353 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3354 splt->contents + 4);
3355 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3356 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3357 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3358 }
3359 else
3360 {
3361 bfd_put_32 (output_bfd,
3362 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3363 splt->contents);
3364 bfd_put_32 (output_bfd,
3365 plt0_entry[1] | ((addr & 0xffff) << 3),
3366 splt->contents + 4);
3367 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3368 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3369 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3370 }
3371
3372 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3373 PLT_ENTRY_SIZE;
3374 }
3375 }
3376
3377 if (htab->etab.sgot != NULL && htab->etab.sgot->size != 0)
3378 {
3379 /* Fill in the first entry in the global offset table.
3380 We use it to point to our dynamic section, if we have one. */
3381 bfd_put_32 (output_bfd,
3382 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3383 htab->etab.sgot->contents);
3384
3385 /* The second entry is reserved for use by the dynamic linker. */
3386 memset (htab->etab.sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3387
3388 /* Set .got entry size. */
3389 elf_section_data (htab->etab.sgot->output_section)
3390 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3391 }
3392
3393 return TRUE;
3394 }
3395
3396 /* Return the section that should be marked against GC for a given
3397 relocation. */
3398
3399 static asection *
3400 elf_metag_gc_mark_hook (asection *sec,
3401 struct bfd_link_info *info,
3402 Elf_Internal_Rela *rela,
3403 struct elf_link_hash_entry *hh,
3404 Elf_Internal_Sym *sym)
3405 {
3406 if (hh != NULL)
3407 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3408 {
3409 case R_METAG_GNU_VTINHERIT:
3410 case R_METAG_GNU_VTENTRY:
3411 return NULL;
3412 }
3413
3414 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3415 }
3416
3417 /* Update the got and plt entry reference counts for the section being
3418 removed. */
3419
3420 static bfd_boolean
3421 elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3422 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3423 asection *sec ATTRIBUTE_UNUSED,
3424 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3425 {
3426 Elf_Internal_Shdr *symtab_hdr;
3427 struct elf_link_hash_entry **eh_syms;
3428 bfd_signed_vma *local_got_refcounts;
3429 bfd_signed_vma *local_plt_refcounts;
3430 const Elf_Internal_Rela *rel, *relend;
3431
3432 if (bfd_link_relocatable (info))
3433 return TRUE;
3434
3435 elf_section_data (sec)->local_dynrel = NULL;
3436
3437 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3438 eh_syms = elf_sym_hashes (abfd);
3439 local_got_refcounts = elf_local_got_refcounts (abfd);
3440 local_plt_refcounts = local_got_refcounts;
3441 if (local_plt_refcounts != NULL)
3442 local_plt_refcounts += symtab_hdr->sh_info;
3443
3444 relend = relocs + sec->reloc_count;
3445 for (rel = relocs; rel < relend; rel++)
3446 {
3447 unsigned long r_symndx;
3448 unsigned int r_type;
3449 struct elf_link_hash_entry *eh = NULL;
3450
3451 r_symndx = ELF32_R_SYM (rel->r_info);
3452 if (r_symndx >= symtab_hdr->sh_info)
3453 {
3454 struct elf_metag_link_hash_entry *hh;
3455 struct elf_metag_dyn_reloc_entry **hdh_pp;
3456 struct elf_metag_dyn_reloc_entry *hdh_p;
3457
3458 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3459 while (eh->root.type == bfd_link_hash_indirect
3460 || eh->root.type == bfd_link_hash_warning)
3461 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3462 hh = (struct elf_metag_link_hash_entry *) eh;
3463
3464 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3465 hdh_pp = &hdh_p->hdh_next)
3466 if (hdh_p->sec == sec)
3467 {
3468 /* Everything must go for SEC. */
3469 *hdh_pp = hdh_p->hdh_next;
3470 break;
3471 }
3472 }
3473
3474 r_type = ELF32_R_TYPE (rel->r_info);
3475 switch (r_type)
3476 {
3477 case R_METAG_TLS_LDM:
3478 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3479 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3480 break;
3481 case R_METAG_TLS_IE:
3482 case R_METAG_TLS_GD:
3483 case R_METAG_GETSET_GOT:
3484 if (eh != NULL)
3485 {
3486 if (eh->got.refcount > 0)
3487 eh->got.refcount -= 1;
3488 }
3489 else if (local_got_refcounts != NULL)
3490 {
3491 if (local_got_refcounts[r_symndx] > 0)
3492 local_got_refcounts[r_symndx] -= 1;
3493 }
3494 break;
3495
3496 case R_METAG_RELBRANCH_PLT:
3497 if (eh != NULL)
3498 {
3499 if (eh->plt.refcount > 0)
3500 eh->plt.refcount -= 1;
3501 }
3502 break;
3503
3504 case R_METAG_ADDR32:
3505 case R_METAG_HIADDR16:
3506 case R_METAG_LOADDR16:
3507 case R_METAG_GETSETOFF:
3508 case R_METAG_RELBRANCH:
3509 if (eh != NULL)
3510 {
3511 struct elf_metag_link_hash_entry *hh;
3512 struct elf_metag_dyn_reloc_entry **hdh_pp;
3513 struct elf_metag_dyn_reloc_entry *hdh_p;
3514
3515 if (!bfd_link_pic (info) && eh->plt.refcount > 0)
3516 eh->plt.refcount -= 1;
3517
3518 hh = (struct elf_metag_link_hash_entry *) eh;
3519
3520 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3521 hdh_pp = &hdh_p->hdh_next)
3522 if (hdh_p->sec == sec)
3523 {
3524 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3525 hdh_p->relative_count -= 1;
3526 hdh_p->count -= 1;
3527 if (hdh_p->count == 0)
3528 *hdh_pp = hdh_p->hdh_next;
3529 break;
3530 }
3531 }
3532 break;
3533
3534 default:
3535 break;
3536 }
3537 }
3538
3539 return TRUE;
3540 }
3541
3542 /* Determine the type of stub needed, if any, for a call. */
3543
3544 static enum elf_metag_stub_type
3545 metag_type_of_stub (asection *input_sec,
3546 const Elf_Internal_Rela *rel,
3547 struct elf_metag_link_hash_entry *hh,
3548 bfd_vma destination,
3549 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3550 {
3551 bfd_vma location;
3552 bfd_vma branch_offset;
3553 bfd_vma max_branch_offset;
3554
3555 if (hh != NULL &&
3556 !(hh->eh.root.type == bfd_link_hash_defined
3557 || hh->eh.root.type == bfd_link_hash_defweak))
3558 return metag_stub_none;
3559
3560 /* Determine where the call point is. */
3561 location = (input_sec->output_offset
3562 + input_sec->output_section->vma
3563 + rel->r_offset);
3564
3565 branch_offset = destination - location;
3566
3567 /* Determine if a long branch stub is needed. Meta branch offsets
3568 are signed 19 bits 4 byte aligned. */
3569 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3570
3571 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3572 {
3573 if (bfd_link_pic (info))
3574 return metag_stub_long_branch_shared;
3575 else
3576 return metag_stub_long_branch;
3577 }
3578
3579 return metag_stub_none;
3580 }
3581
3582 #define MOVT_A0_3 0x82180005
3583 #define JUMP_A0_3 0xac180003
3584
3585 #define MOVT_A1LBP 0x83080005
3586 #define ADD_A1LBP 0x83080000
3587
3588 #define ADDT_A0_3_CPC 0x82980001
3589 #define ADD_A0_3_A0_3 0x82180000
3590 #define MOV_PC_A0_3 0xa3180ca0
3591
3592 static bfd_boolean
3593 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3594 {
3595 struct elf_metag_stub_hash_entry *hsh;
3596 asection *stub_sec;
3597 bfd *stub_bfd;
3598 bfd_byte *loc;
3599 bfd_vma sym_value;
3600 int size;
3601
3602 /* Massage our args to the form they really have. */
3603 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3604
3605 stub_sec = hsh->stub_sec;
3606
3607 /* Make a note of the offset within the stubs for this entry. */
3608 hsh->stub_offset = stub_sec->size;
3609 loc = stub_sec->contents + hsh->stub_offset;
3610
3611 stub_bfd = stub_sec->owner;
3612
3613 switch (hsh->stub_type)
3614 {
3615 case metag_stub_long_branch_shared:
3616 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3617 calculate the jump target using A0.3 as a temporary. Then a MOV
3618 to PC carries out the jump. */
3619 sym_value = (hsh->target_value
3620 + hsh->target_section->output_offset
3621 + hsh->target_section->output_section->vma
3622 + hsh->addend);
3623
3624 sym_value -= (hsh->stub_offset
3625 + stub_sec->output_offset
3626 + stub_sec->output_section->vma);
3627
3628 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3629 loc);
3630
3631 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3632 loc + 4);
3633
3634 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3635
3636 size = 12;
3637 break;
3638 case metag_stub_long_branch:
3639 /* A standard long branch stub is a MOVT instruction followed by a
3640 JUMP instruction using the A0.3 register as a temporary. This is
3641 the same method used by the LDLK linker (patch.c). */
3642 sym_value = (hsh->target_value
3643 + hsh->target_section->output_offset
3644 + hsh->target_section->output_section->vma
3645 + hsh->addend);
3646
3647 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3648 loc);
3649
3650 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3651
3652 size = 8;
3653 break;
3654 default:
3655 BFD_FAIL ();
3656 return FALSE;
3657 }
3658
3659 stub_sec->size += size;
3660 return TRUE;
3661 }
3662
3663 /* As above, but don't actually build the stub. Just bump offset so
3664 we know stub section sizes. */
3665
3666 static bfd_boolean
3667 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3668 {
3669 struct elf_metag_stub_hash_entry *hsh;
3670 int size = 0;
3671
3672 /* Massage our args to the form they really have. */
3673 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3674
3675 if (hsh->stub_type == metag_stub_long_branch)
3676 size = 8;
3677 else if (hsh->stub_type == metag_stub_long_branch_shared)
3678 size = 12;
3679
3680 hsh->stub_sec->size += size;
3681 return TRUE;
3682 }
3683
3684 /* Set up various things so that we can make a list of input sections
3685 for each output section included in the link. Returns -1 on error,
3686 0 when no stubs will be needed, and 1 on success. */
3687
3688 int
3689 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3690 {
3691 bfd *input_bfd;
3692 unsigned int bfd_count;
3693 unsigned int top_id, top_index;
3694 asection *section;
3695 asection **input_list, **list;
3696 bfd_size_type amt;
3697 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3698
3699 /* Count the number of input BFDs and find the top input section id. */
3700 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3701 input_bfd != NULL;
3702 input_bfd = input_bfd->link.next)
3703 {
3704 bfd_count += 1;
3705 for (section = input_bfd->sections;
3706 section != NULL;
3707 section = section->next)
3708 {
3709 if (top_id < section->id)
3710 top_id = section->id;
3711 }
3712 }
3713
3714 htab->bfd_count = bfd_count;
3715
3716 amt = sizeof (struct map_stub) * (top_id + 1);
3717 htab->stub_group = bfd_zmalloc (amt);
3718 if (htab->stub_group == NULL)
3719 return -1;
3720
3721 /* We can't use output_bfd->section_count here to find the top output
3722 section index as some sections may have been removed, and
3723 strip_excluded_output_sections doesn't renumber the indices. */
3724 for (section = output_bfd->sections, top_index = 0;
3725 section != NULL;
3726 section = section->next)
3727 {
3728 if (top_index < section->index)
3729 top_index = section->index;
3730 }
3731
3732 htab->top_index = top_index;
3733 amt = sizeof (asection *) * (top_index + 1);
3734 input_list = bfd_malloc (amt);
3735 htab->input_list = input_list;
3736 if (input_list == NULL)
3737 return -1;
3738
3739 /* For sections we aren't interested in, mark their entries with a
3740 value we can check later. */
3741 list = input_list + top_index;
3742 do
3743 *list = bfd_abs_section_ptr;
3744 while (list-- != input_list);
3745
3746 for (section = output_bfd->sections;
3747 section != NULL;
3748 section = section->next)
3749 {
3750 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3751 * have PC relative relocs in them but no code flag set. */
3752 if (((section->flags & SEC_CODE) != 0) ||
3753 strcmp(".ctors", section->name) ||
3754 strcmp(".dtors", section->name))
3755 input_list[section->index] = NULL;
3756 }
3757
3758 return 1;
3759 }
3760
3761 /* The linker repeatedly calls this function for each input section,
3762 in the order that input sections are linked into output sections.
3763 Build lists of input sections to determine groupings between which
3764 we may insert linker stubs. */
3765
3766 void
3767 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3768 {
3769 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3770
3771 if (isec->output_section->index <= htab->top_index)
3772 {
3773 asection **list = htab->input_list + isec->output_section->index;
3774 if (*list != bfd_abs_section_ptr)
3775 {
3776 /* Steal the link_sec pointer for our list. */
3777 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3778 /* This happens to make the list in reverse order,
3779 which is what we want. */
3780 PREV_SEC (isec) = *list;
3781 *list = isec;
3782 }
3783 }
3784 }
3785
3786 /* See whether we can group stub sections together. Grouping stub
3787 sections may result in fewer stubs. More importantly, we need to
3788 put all .init* and .fini* stubs at the beginning of the .init or
3789 .fini output sections respectively, because glibc splits the
3790 _init and _fini functions into multiple parts. Putting a stub in
3791 the middle of a function is not a good idea. */
3792
3793 static void
3794 group_sections (struct elf_metag_link_hash_table *htab,
3795 bfd_size_type stub_group_size,
3796 bfd_boolean stubs_always_before_branch)
3797 {
3798 asection **list = htab->input_list + htab->top_index;
3799 do
3800 {
3801 asection *tail = *list;
3802 if (tail == bfd_abs_section_ptr)
3803 continue;
3804 while (tail != NULL)
3805 {
3806 asection *curr;
3807 asection *prev;
3808 bfd_size_type total;
3809 bfd_boolean big_sec;
3810
3811 curr = tail;
3812 total = tail->size;
3813 big_sec = total >= stub_group_size;
3814
3815 while ((prev = PREV_SEC (curr)) != NULL
3816 && ((total += curr->output_offset - prev->output_offset)
3817 < stub_group_size))
3818 curr = prev;
3819
3820 /* OK, the size from the start of CURR to the end is less
3821 than stub_group_size bytes and thus can be handled by one stub
3822 section. (or the tail section is itself larger than
3823 stub_group_size bytes, in which case we may be toast.)
3824 We should really be keeping track of the total size of
3825 stubs added here, as stubs contribute to the final output
3826 section size. */
3827 do
3828 {
3829 prev = PREV_SEC (tail);
3830 /* Set up this stub group. */
3831 htab->stub_group[tail->id].link_sec = curr;
3832 }
3833 while (tail != curr && (tail = prev) != NULL);
3834
3835 /* But wait, there's more! Input sections up to stub_group_size
3836 bytes before the stub section can be handled by it too.
3837 Don't do this if we have a really large section after the
3838 stubs, as adding more stubs increases the chance that
3839 branches may not reach into the stub section. */
3840 if (!stubs_always_before_branch && !big_sec)
3841 {
3842 total = 0;
3843 while (prev != NULL
3844 && ((total += tail->output_offset - prev->output_offset)
3845 < stub_group_size))
3846 {
3847 tail = prev;
3848 prev = PREV_SEC (tail);
3849 htab->stub_group[tail->id].link_sec = curr;
3850 }
3851 }
3852 tail = prev;
3853 }
3854 }
3855 while (list-- != htab->input_list);
3856 free (htab->input_list);
3857 #undef PREV_SEC
3858 }
3859
3860 /* Read in all local syms for all input bfds.
3861 Returns -1 on error, 0 otherwise. */
3862
3863 static int
3864 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3865 struct bfd_link_info *info)
3866 {
3867 unsigned int bfd_indx;
3868 Elf_Internal_Sym *local_syms, **all_local_syms;
3869 int stub_changed = 0;
3870 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3871
3872 /* We want to read in symbol extension records only once. To do this
3873 we need to read in the local symbols in parallel and save them for
3874 later use; so hold pointers to the local symbols in an array. */
3875 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3876 all_local_syms = bfd_zmalloc (amt);
3877 htab->all_local_syms = all_local_syms;
3878 if (all_local_syms == NULL)
3879 return -1;
3880
3881 /* Walk over all the input BFDs, swapping in local symbols. */
3882 for (bfd_indx = 0;
3883 input_bfd != NULL;
3884 input_bfd = input_bfd->link.next, bfd_indx++)
3885 {
3886 Elf_Internal_Shdr *symtab_hdr;
3887
3888 /* We'll need the symbol table in a second. */
3889 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3890 if (symtab_hdr->sh_info == 0)
3891 continue;
3892
3893 /* We need an array of the local symbols attached to the input bfd. */
3894 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3895 if (local_syms == NULL)
3896 {
3897 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3898 symtab_hdr->sh_info, 0,
3899 NULL, NULL, NULL);
3900 /* Cache them for elf_link_input_bfd. */
3901 symtab_hdr->contents = (unsigned char *) local_syms;
3902 }
3903 if (local_syms == NULL)
3904 return -1;
3905
3906 all_local_syms[bfd_indx] = local_syms;
3907 }
3908
3909 return stub_changed;
3910 }
3911
3912 /* Determine and set the size of the stub section for a final link.
3913
3914 The basic idea here is to examine all the relocations looking for
3915 PC-relative calls to a target that is unreachable with a "CALLR"
3916 instruction. */
3917
3918 /* See elf32-hppa.c and elf64-ppc.c. */
3919
3920 bfd_boolean
3921 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3922 struct bfd_link_info *info,
3923 bfd_signed_vma group_size,
3924 asection * (*add_stub_section) (const char *, asection *),
3925 void (*layout_sections_again) (void))
3926 {
3927 bfd_size_type stub_group_size;
3928 bfd_boolean stubs_always_before_branch;
3929 bfd_boolean stub_changed;
3930 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3931
3932 /* Stash our params away. */
3933 htab->stub_bfd = stub_bfd;
3934 htab->add_stub_section = add_stub_section;
3935 htab->layout_sections_again = layout_sections_again;
3936 stubs_always_before_branch = group_size < 0;
3937 if (group_size < 0)
3938 stub_group_size = -group_size;
3939 else
3940 stub_group_size = group_size;
3941 if (stub_group_size == 1)
3942 {
3943 /* Default values. */
3944 /* FIXME: not sure what these values should be */
3945 if (stubs_always_before_branch)
3946 {
3947 stub_group_size = (1 << BRANCH_BITS);
3948 }
3949 else
3950 {
3951 stub_group_size = (1 << BRANCH_BITS);
3952 }
3953 }
3954
3955 group_sections (htab, stub_group_size, stubs_always_before_branch);
3956
3957 switch (get_local_syms (output_bfd, info->input_bfds, info))
3958 {
3959 default:
3960 if (htab->all_local_syms)
3961 goto error_ret_free_local;
3962 return FALSE;
3963
3964 case 0:
3965 stub_changed = FALSE;
3966 break;
3967
3968 case 1:
3969 stub_changed = TRUE;
3970 break;
3971 }
3972
3973 while (1)
3974 {
3975 bfd *input_bfd;
3976 unsigned int bfd_indx;
3977 asection *stub_sec;
3978
3979 for (input_bfd = info->input_bfds, bfd_indx = 0;
3980 input_bfd != NULL;
3981 input_bfd = input_bfd->link.next, bfd_indx++)
3982 {
3983 Elf_Internal_Shdr *symtab_hdr;
3984 asection *section;
3985 Elf_Internal_Sym *local_syms;
3986
3987 /* We'll need the symbol table in a second. */
3988 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3989 if (symtab_hdr->sh_info == 0)
3990 continue;
3991
3992 local_syms = htab->all_local_syms[bfd_indx];
3993
3994 /* Walk over each section attached to the input bfd. */
3995 for (section = input_bfd->sections;
3996 section != NULL;
3997 section = section->next)
3998 {
3999 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4000
4001 /* If there aren't any relocs, then there's nothing more
4002 to do. */
4003 if ((section->flags & SEC_RELOC) == 0
4004 || section->reloc_count == 0)
4005 continue;
4006
4007 /* If this section is a link-once section that will be
4008 discarded, then don't create any stubs. */
4009 if (section->output_section == NULL
4010 || section->output_section->owner != output_bfd)
4011 continue;
4012
4013 /* Get the relocs. */
4014 internal_relocs
4015 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4016 info->keep_memory);
4017 if (internal_relocs == NULL)
4018 goto error_ret_free_local;
4019
4020 /* Now examine each relocation. */
4021 irela = internal_relocs;
4022 irelaend = irela + section->reloc_count;
4023 for (; irela < irelaend; irela++)
4024 {
4025 unsigned int r_type, r_indx;
4026 enum elf_metag_stub_type stub_type;
4027 struct elf_metag_stub_hash_entry *hsh;
4028 asection *sym_sec;
4029 bfd_vma sym_value;
4030 bfd_vma destination;
4031 struct elf_metag_link_hash_entry *hh;
4032 char *stub_name;
4033 const asection *id_sec;
4034
4035 r_type = ELF32_R_TYPE (irela->r_info);
4036 r_indx = ELF32_R_SYM (irela->r_info);
4037
4038 if (r_type >= (unsigned int) R_METAG_MAX)
4039 {
4040 bfd_set_error (bfd_error_bad_value);
4041 error_ret_free_internal:
4042 if (elf_section_data (section)->relocs == NULL)
4043 free (internal_relocs);
4044 goto error_ret_free_local;
4045 }
4046
4047 /* Only look for stubs on CALLR and B instructions. */
4048 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4049 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4050 continue;
4051
4052 /* Now determine the call target, its name, value,
4053 section. */
4054 sym_sec = NULL;
4055 sym_value = 0;
4056 destination = 0;
4057 hh = NULL;
4058 if (r_indx < symtab_hdr->sh_info)
4059 {
4060 /* It's a local symbol. */
4061 Elf_Internal_Sym *sym;
4062 Elf_Internal_Shdr *hdr;
4063 unsigned int shndx;
4064
4065 sym = local_syms + r_indx;
4066 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4067 sym_value = sym->st_value;
4068 shndx = sym->st_shndx;
4069 if (shndx < elf_numsections (input_bfd))
4070 {
4071 hdr = elf_elfsections (input_bfd)[shndx];
4072 sym_sec = hdr->bfd_section;
4073 destination = (sym_value + irela->r_addend
4074 + sym_sec->output_offset
4075 + sym_sec->output_section->vma);
4076 }
4077 }
4078 else
4079 {
4080 /* It's an external symbol. */
4081 int e_indx;
4082
4083 e_indx = r_indx - symtab_hdr->sh_info;
4084 hh = ((struct elf_metag_link_hash_entry *)
4085 elf_sym_hashes (input_bfd)[e_indx]);
4086
4087 while (hh->eh.root.type == bfd_link_hash_indirect
4088 || hh->eh.root.type == bfd_link_hash_warning)
4089 hh = ((struct elf_metag_link_hash_entry *)
4090 hh->eh.root.u.i.link);
4091
4092 if (hh->eh.root.type == bfd_link_hash_defined
4093 || hh->eh.root.type == bfd_link_hash_defweak)
4094 {
4095 sym_sec = hh->eh.root.u.def.section;
4096 sym_value = hh->eh.root.u.def.value;
4097 if (hh->eh.plt.offset != (bfd_vma) -1
4098 && hh->eh.dynindx != -1
4099 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4100 {
4101 sym_sec = htab->etab.splt;
4102 sym_value = hh->eh.plt.offset;
4103 }
4104
4105 if (sym_sec->output_section != NULL)
4106 destination = (sym_value + irela->r_addend
4107 + sym_sec->output_offset
4108 + sym_sec->output_section->vma);
4109 else
4110 continue;
4111 }
4112 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4113 {
4114 if (! bfd_link_pic (info))
4115 continue;
4116 }
4117 else if (hh->eh.root.type == bfd_link_hash_undefined)
4118 {
4119 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4120 && (ELF_ST_VISIBILITY (hh->eh.other)
4121 == STV_DEFAULT)))
4122 continue;
4123 }
4124 else
4125 {
4126 bfd_set_error (bfd_error_bad_value);
4127 goto error_ret_free_internal;
4128 }
4129 }
4130
4131 /* Determine what (if any) linker stub is needed. */
4132 stub_type = metag_type_of_stub (section, irela, hh,
4133 destination, info);
4134 if (stub_type == metag_stub_none)
4135 continue;
4136
4137 /* Support for grouping stub sections. */
4138 id_sec = htab->stub_group[section->id].link_sec;
4139
4140 /* Get the name of this stub. */
4141 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4142 if (!stub_name)
4143 goto error_ret_free_internal;
4144
4145 hsh = metag_stub_hash_lookup (&htab->bstab,
4146 stub_name,
4147 FALSE, FALSE);
4148 if (hsh != NULL)
4149 {
4150 /* The proper stub has already been created. */
4151 free (stub_name);
4152 continue;
4153 }
4154
4155 hsh = metag_add_stub (stub_name, section, htab);
4156 if (hsh == NULL)
4157 {
4158 free (stub_name);
4159 goto error_ret_free_internal;
4160 }
4161 hsh->target_value = sym_value;
4162 hsh->target_section = sym_sec;
4163 hsh->stub_type = stub_type;
4164 hsh->hh = hh;
4165 hsh->addend = irela->r_addend;
4166 stub_changed = TRUE;
4167 }
4168
4169 /* We're done with the internal relocs, free them. */
4170 if (elf_section_data (section)->relocs == NULL)
4171 free (internal_relocs);
4172 }
4173 }
4174
4175 if (!stub_changed)
4176 break;
4177
4178 /* OK, we've added some stubs. Find out the new size of the
4179 stub sections. */
4180 for (stub_sec = htab->stub_bfd->sections;
4181 stub_sec != NULL;
4182 stub_sec = stub_sec->next)
4183 stub_sec->size = 0;
4184
4185 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4186
4187 /* Ask the linker to do its stuff. */
4188 (*htab->layout_sections_again) ();
4189 stub_changed = FALSE;
4190 }
4191
4192 free (htab->all_local_syms);
4193 return TRUE;
4194
4195 error_ret_free_local:
4196 free (htab->all_local_syms);
4197 return FALSE;
4198 }
4199
4200 /* Build all the stubs associated with the current output file. The
4201 stubs are kept in a hash table attached to the main linker hash
4202 table. This function is called via metagelf_finish in the linker. */
4203
4204 bfd_boolean
4205 elf_metag_build_stubs (struct bfd_link_info *info)
4206 {
4207 asection *stub_sec;
4208 struct bfd_hash_table *table;
4209 struct elf_metag_link_hash_table *htab;
4210
4211 htab = metag_link_hash_table (info);
4212
4213 for (stub_sec = htab->stub_bfd->sections;
4214 stub_sec != NULL;
4215 stub_sec = stub_sec->next)
4216 {
4217 bfd_size_type size;
4218
4219 /* Allocate memory to hold the linker stubs. */
4220 size = stub_sec->size;
4221 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4222 if (stub_sec->contents == NULL && size != 0)
4223 return FALSE;
4224 stub_sec->size = 0;
4225 }
4226
4227 /* Build the stubs as directed by the stub hash table. */
4228 table = &htab->bstab;
4229 bfd_hash_traverse (table, metag_build_one_stub, info);
4230
4231 return TRUE;
4232 }
4233
4234 /* Return TRUE if SYM represents a local label symbol. */
4235
4236 static bfd_boolean
4237 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4238 {
4239 if (name[0] == '$' && name[1] == 'L')
4240 return 1;
4241 return _bfd_elf_is_local_label_name (abfd, name);
4242 }
4243
4244 /* Return address for Ith PLT stub in section PLT, for relocation REL
4245 or (bfd_vma) -1 if it should not be included. */
4246
4247 static bfd_vma
4248 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4249 const arelent *rel ATTRIBUTE_UNUSED)
4250 {
4251 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4252 }
4253
4254 #define ELF_ARCH bfd_arch_metag
4255 #define ELF_TARGET_ID METAG_ELF_DATA
4256 #define ELF_MACHINE_CODE EM_METAG
4257 #define ELF_MINPAGESIZE 0x1000
4258 #define ELF_MAXPAGESIZE 0x4000
4259 #define ELF_COMMONPAGESIZE 0x1000
4260
4261 #define TARGET_LITTLE_SYM metag_elf32_vec
4262 #define TARGET_LITTLE_NAME "elf32-metag"
4263
4264 #define elf_symbol_leading_char '_'
4265
4266 #define elf_info_to_howto_rel NULL
4267 #define elf_info_to_howto metag_info_to_howto_rela
4268
4269 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4270 #define bfd_elf32_bfd_link_hash_table_create \
4271 elf_metag_link_hash_table_create
4272 #define elf_backend_relocate_section elf_metag_relocate_section
4273 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4274 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4275 #define elf_backend_check_relocs elf_metag_check_relocs
4276 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4277 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4278 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4279 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4280 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4281 #define elf_backend_omit_section_dynsym \
4282 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4283 #define elf_backend_post_process_headers elf_metag_post_process_headers
4284 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4285 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4286 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4287
4288 #define elf_backend_can_gc_sections 1
4289 #define elf_backend_can_refcount 1
4290 #define elf_backend_rela_normal 1
4291 #define elf_backend_want_got_plt 1
4292 #define elf_backend_want_got_sym 0
4293 #define elf_backend_want_plt_sym 0
4294 #define elf_backend_plt_readonly 1
4295 #define elf_backend_dtrel_excludes_plt 1
4296
4297 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4298 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4299
4300 #include "elf32-target.h"
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