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