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* elf32-metag.c: Error on HIADDR16/LOADDR16 in shared link.
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013 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 0, /* 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 int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sgot;
847 asection *sgotplt;
848 asection *srelgot;
849 asection *splt;
850 asection *srelplt;
851 asection *sdynbss;
852 asection *srelbss;
853
854 /* Small local sym cache. */
855 struct sym_cache sym_cache;
856
857 /* Data for LDM relocations. */
858 union
859 {
860 bfd_signed_vma refcount;
861 bfd_vma offset;
862 } tls_ldm_got;
863 };
864
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
867 segment p_vaddr. */
868 static bfd_vma
869 dtpoff_base (struct bfd_link_info *info)
870 {
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info)->tls_sec == NULL)
873 return 0;
874 return elf_hash_table (info)->tls_sec->vma;
875 }
876
877 /* Return the relocation value for R_METAG_TLS_IE */
878 static bfd_vma
879 tpoff (struct bfd_link_info *info, bfd_vma address)
880 {
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info)->tls_sec == NULL)
883 return 0;
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address - elf_hash_table (info)->tls_sec->vma
887 + align_power ((bfd_vma) 8,
888 elf_hash_table (info)->tls_sec->alignment_power));
889 }
890
891 static void
892 metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
893 arelent *cache_ptr,
894 Elf_Internal_Rela *dst)
895 {
896 unsigned int r_type;
897
898 r_type = ELF32_R_TYPE (dst->r_info);
899 BFD_ASSERT (r_type < (unsigned int) R_METAG_MAX);
900 cache_ptr->howto = & elf_metag_howto_table [r_type];
901 }
902
903 static reloc_howto_type *
904 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
905 bfd_reloc_code_real_type code)
906 {
907 unsigned int i;
908
909 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
910 if (metag_reloc_map [i].bfd_reloc_val == code)
911 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
912
913 return NULL;
914 }
915
916 static reloc_howto_type *
917 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
918 const char *r_name)
919 {
920 unsigned int i;
921
922 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
923 if (elf_metag_howto_table[i].name != NULL
924 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
925 return &elf_metag_howto_table[i];
926
927 return NULL;
928 }
929
930 /* Various hash macros and functions. */
931 #define metag_link_hash_table(p) \
932 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
933 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
934
935 #define metag_elf_hash_entry(ent) \
936 ((struct elf_metag_link_hash_entry *)(ent))
937
938 #define metag_stub_hash_entry(ent) \
939 ((struct elf_metag_stub_hash_entry *)(ent))
940
941 #define metag_stub_hash_lookup(table, string, create, copy) \
942 ((struct elf_metag_stub_hash_entry *) \
943 bfd_hash_lookup ((table), (string), (create), (copy)))
944
945 #define metag_elf_local_got_tls_type(abfd) \
946 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
947
948 /* Assorted hash table functions. */
949
950 /* Initialize an entry in the stub hash table. */
951
952 static struct bfd_hash_entry *
953 stub_hash_newfunc (struct bfd_hash_entry *entry,
954 struct bfd_hash_table *table,
955 const char *string)
956 {
957 /* Allocate the structure if it has not already been allocated by a
958 subclass. */
959 if (entry == NULL)
960 {
961 entry = bfd_hash_allocate (table,
962 sizeof (struct elf_metag_stub_hash_entry));
963 if (entry == NULL)
964 return entry;
965 }
966
967 /* Call the allocation method of the superclass. */
968 entry = bfd_hash_newfunc (entry, table, string);
969 if (entry != NULL)
970 {
971 struct elf_metag_stub_hash_entry *hsh;
972
973 /* Initialize the local fields. */
974 hsh = (struct elf_metag_stub_hash_entry *) entry;
975 hsh->stub_sec = NULL;
976 hsh->stub_offset = 0;
977 hsh->target_value = 0;
978 hsh->target_section = NULL;
979 hsh->stub_type = metag_stub_long_branch;
980 hsh->hh = NULL;
981 hsh->id_sec = NULL;
982 }
983
984 return entry;
985 }
986
987 /* Initialize an entry in the link hash table. */
988
989 static struct bfd_hash_entry *
990 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
991 struct bfd_hash_table *table,
992 const char *string)
993 {
994 /* Allocate the structure if it has not already been allocated by a
995 subclass. */
996 if (entry == NULL)
997 {
998 entry = bfd_hash_allocate (table,
999 sizeof (struct elf_metag_link_hash_entry));
1000 if (entry == NULL)
1001 return entry;
1002 }
1003
1004 /* Call the allocation method of the superclass. */
1005 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1006 if (entry != NULL)
1007 {
1008 struct elf_metag_link_hash_entry *hh;
1009
1010 /* Initialize the local fields. */
1011 hh = (struct elf_metag_link_hash_entry *) entry;
1012 hh->hsh_cache = NULL;
1013 hh->dyn_relocs = NULL;
1014 hh->tls_type = GOT_UNKNOWN;
1015 }
1016
1017 return entry;
1018 }
1019
1020 /* Create the derived linker hash table. The Meta ELF port uses the derived
1021 hash table to keep information specific to the Meta ELF linker (without
1022 using static variables). */
1023
1024 static struct bfd_link_hash_table *
1025 elf_metag_link_hash_table_create (bfd *abfd)
1026 {
1027 struct elf_metag_link_hash_table *htab;
1028 bfd_size_type amt = sizeof (*htab);
1029
1030 htab = bfd_malloc (amt);
1031 if (htab == NULL)
1032 return NULL;
1033
1034 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1035 metag_link_hash_newfunc,
1036 sizeof (struct elf_metag_link_hash_entry),
1037 METAG_ELF_DATA))
1038 {
1039 free (htab);
1040 return NULL;
1041 }
1042
1043 /* Init the stub hash table too. */
1044 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1045 sizeof (struct elf_metag_stub_hash_entry)))
1046 return NULL;
1047
1048 htab->stub_bfd = NULL;
1049 htab->add_stub_section = NULL;
1050 htab->layout_sections_again = NULL;
1051 htab->stub_group = NULL;
1052 htab->sgot = NULL;
1053 htab->sgotplt = NULL;
1054 htab->srelgot = NULL;
1055 htab->splt = NULL;
1056 htab->srelplt = NULL;
1057 htab->sdynbss = NULL;
1058 htab->srelbss = NULL;
1059 htab->sym_cache.abfd = NULL;
1060 htab->tls_ldm_got.refcount = 0;
1061
1062 return &htab->etab.root;
1063 }
1064
1065 /* Free the derived linker hash table. */
1066
1067 static void
1068 elf_metag_link_hash_table_free (struct bfd_link_hash_table *btab)
1069 {
1070 struct elf_metag_link_hash_table *htab
1071 = (struct elf_metag_link_hash_table *) btab;
1072
1073 bfd_hash_table_free (&htab->bstab);
1074 _bfd_generic_link_hash_table_free (btab);
1075 }
1076
1077 /* Section name for stubs is the associated section name plus this
1078 string. */
1079 #define STUB_SUFFIX ".stub"
1080
1081 /* Build a name for an entry in the stub hash table. */
1082
1083 static char *
1084 metag_stub_name (const asection *input_section,
1085 const asection *sym_sec,
1086 const struct elf_metag_link_hash_entry *hh,
1087 const Elf_Internal_Rela *rel)
1088 {
1089 char *stub_name;
1090 bfd_size_type len;
1091
1092 if (hh)
1093 {
1094 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1095 stub_name = bfd_malloc (len);
1096 if (stub_name != NULL)
1097 {
1098 sprintf (stub_name, "%08x_%s+%x",
1099 input_section->id & 0xffffffff,
1100 hh->eh.root.root.string,
1101 (int) rel->r_addend & 0xffffffff);
1102 }
1103 }
1104 else
1105 {
1106 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1107 stub_name = bfd_malloc (len);
1108 if (stub_name != NULL)
1109 {
1110 sprintf (stub_name, "%08x_%x:%x+%x",
1111 input_section->id & 0xffffffff,
1112 sym_sec->id & 0xffffffff,
1113 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1114 (int) rel->r_addend & 0xffffffff);
1115 }
1116 }
1117 return stub_name;
1118 }
1119
1120 /* Look up an entry in the stub hash. Stub entries are cached because
1121 creating the stub name takes a bit of time. */
1122
1123 static struct elf_metag_stub_hash_entry *
1124 metag_get_stub_entry (const asection *input_section,
1125 const asection *sym_sec,
1126 struct elf_metag_link_hash_entry *hh,
1127 const Elf_Internal_Rela *rel,
1128 struct elf_metag_link_hash_table *htab)
1129 {
1130 struct elf_metag_stub_hash_entry *hsh;
1131 const asection *id_sec;
1132
1133 /* If this input section is part of a group of sections sharing one
1134 stub section, then use the id of the first section in the group.
1135 Stub names need to include a section id, as there may well be
1136 more than one stub used to reach say, printf, and we need to
1137 distinguish between them. */
1138 id_sec = htab->stub_group[input_section->id].link_sec;
1139
1140 if (hh != NULL && hh->hsh_cache != NULL
1141 && hh->hsh_cache->hh == hh
1142 && hh->hsh_cache->id_sec == id_sec)
1143 {
1144 hsh = hh->hsh_cache;
1145 }
1146 else
1147 {
1148 char *stub_name;
1149
1150 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1151 if (stub_name == NULL)
1152 return NULL;
1153
1154 hsh = metag_stub_hash_lookup (&htab->bstab,
1155 stub_name, FALSE, FALSE);
1156
1157 if (hh != NULL)
1158 hh->hsh_cache = hsh;
1159
1160 free (stub_name);
1161 }
1162
1163 return hsh;
1164 }
1165
1166 /* Add a new stub entry to the stub hash. Not all fields of the new
1167 stub entry are initialised. */
1168
1169 static struct elf_metag_stub_hash_entry *
1170 metag_add_stub (const char *stub_name,
1171 asection *section,
1172 struct elf_metag_link_hash_table *htab)
1173 {
1174 asection *link_sec;
1175 asection *stub_sec;
1176 struct elf_metag_stub_hash_entry *hsh;
1177
1178 link_sec = htab->stub_group[section->id].link_sec;
1179 stub_sec = htab->stub_group[section->id].stub_sec;
1180 if (stub_sec == NULL)
1181 {
1182 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1183 if (stub_sec == NULL)
1184 {
1185 size_t namelen;
1186 bfd_size_type len;
1187 char *s_name;
1188
1189 namelen = strlen (link_sec->name);
1190 len = namelen + sizeof (STUB_SUFFIX);
1191 s_name = bfd_alloc (htab->stub_bfd, len);
1192 if (s_name == NULL)
1193 return NULL;
1194
1195 memcpy (s_name, link_sec->name, namelen);
1196 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1197
1198 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1199 if (stub_sec == NULL)
1200 return NULL;
1201 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1202 }
1203 htab->stub_group[section->id].stub_sec = stub_sec;
1204 }
1205
1206 /* Enter this entry into the linker stub hash table. */
1207 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1208 TRUE, FALSE);
1209 if (hsh == NULL)
1210 {
1211 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
1212 section->owner,
1213 stub_name);
1214 return NULL;
1215 }
1216
1217 hsh->stub_sec = stub_sec;
1218 hsh->stub_offset = 0;
1219 hsh->id_sec = link_sec;
1220 return hsh;
1221 }
1222
1223 /* Check a signed integer value can be represented in the given number
1224 of bits. */
1225
1226 static bfd_boolean
1227 within_signed_range (int value, unsigned int bits)
1228 {
1229 int min_val = -(1 << (bits - 1));
1230 int max_val = (1 << (bits - 1)) - 1;
1231 return (value <= max_val) && (value >= min_val);
1232 }
1233
1234 /* Perform a relocation as part of a final link. */
1235
1236 static bfd_reloc_status_type
1237 metag_final_link_relocate (reloc_howto_type *howto,
1238 bfd *input_bfd,
1239 asection *input_section,
1240 bfd_byte *contents,
1241 Elf_Internal_Rela *rel,
1242 bfd_vma relocation,
1243 struct elf_metag_link_hash_entry *hh,
1244 struct elf_metag_link_hash_table *htab,
1245 asection *sym_sec)
1246 {
1247 bfd_reloc_status_type r = bfd_reloc_ok;
1248 bfd_byte *hit_data = contents + rel->r_offset;
1249 int opcode, op_shift, op_extended, l1, l2;
1250 bfd_signed_vma srel, addend = rel->r_addend;
1251 struct elf_metag_stub_hash_entry *hsh = NULL;
1252 bfd_vma location;
1253
1254 /* Find out where we are and where we're going. */
1255 location = (rel->r_offset +
1256 input_section->output_offset +
1257 input_section->output_section->vma);
1258
1259 switch (howto->type)
1260 {
1261 case R_METAG_RELBRANCH:
1262 case R_METAG_RELBRANCH_PLT:
1263 /* Make it a pc relative offset. */
1264 relocation -= location;
1265 break;
1266 case R_METAG_TLS_GD:
1267 case R_METAG_TLS_IE:
1268 relocation -= elf_gp (input_section->output_section->owner);
1269 break;
1270 default:
1271 break;
1272 }
1273
1274 switch (howto->type)
1275 {
1276 case R_METAG_RELBRANCH_PLT:
1277 case R_METAG_RELBRANCH:
1278 opcode = bfd_get_32 (input_bfd, hit_data);
1279
1280 srel = (bfd_signed_vma) relocation;
1281 srel += addend;
1282
1283 /* If the branch is out of reach, then redirect the
1284 call to the local stub for this function. */
1285 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1286 (srel < - (1 << (BRANCH_BITS + 1))))
1287 {
1288 if (sym_sec == NULL)
1289 break;
1290
1291 hsh = metag_get_stub_entry (input_section, sym_sec,
1292 hh, rel, htab);
1293 if (hsh == NULL)
1294 return bfd_reloc_undefined;
1295
1296 /* Munge up the value and addend so that we call the stub
1297 rather than the procedure directly. */
1298 srel = (hsh->stub_offset
1299 + hsh->stub_sec->output_offset
1300 + hsh->stub_sec->output_section->vma);
1301 srel -= location;
1302 }
1303
1304 srel = srel >> 2;
1305
1306 if (!within_signed_range (srel, BRANCH_BITS))
1307 {
1308 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1309 srel = 0;
1310 else
1311 return bfd_reloc_overflow;
1312 }
1313
1314 opcode &= ~(0x7ffff << 5);
1315 opcode |= ((srel & 0x7ffff) << 5);
1316
1317 bfd_put_32 (input_bfd, opcode, hit_data);
1318 break;
1319 case R_METAG_GETSETOFF:
1320 case R_METAG_GETSET_GOT:
1321 case R_METAG_GETSET_GOTOFF:
1322 opcode = bfd_get_32 (input_bfd, hit_data);
1323
1324 srel = (bfd_signed_vma) relocation;
1325 srel += addend;
1326
1327 /* Is this a standard or extended GET/SET? */
1328 if ((opcode & 0xf0000000) == 0xa0000000)
1329 {
1330 /* Extended GET/SET. */
1331 l1 = opcode & 0x2;
1332 l2 = opcode & 0x4;
1333 op_extended = 1;
1334 }
1335 else
1336 {
1337 /* Standard GET/SET. */
1338 l1 = opcode & 0x01000000;
1339 l2 = opcode & 0x04000000;
1340 op_extended = 0;
1341 }
1342
1343 /* Calculate the width of the GET/SET and how much we need to
1344 shift the result by. */
1345 if (l2)
1346 if (l1)
1347 op_shift = 3;
1348 else
1349 op_shift = 2;
1350 else
1351 if (l1)
1352 op_shift = 1;
1353 else
1354 op_shift = 0;
1355
1356 /* GET/SET offsets are scaled by the width of the transfer. */
1357 srel = srel >> op_shift;
1358
1359 /* Extended GET/SET has signed 12 bits of offset, standard has
1360 signed 6 bits. */
1361 if (op_extended)
1362 {
1363 if (!within_signed_range (srel, 12))
1364 {
1365 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1366 srel = 0;
1367 else
1368 return bfd_reloc_overflow;
1369 }
1370 opcode &= ~(0xfff << 7);
1371 opcode |= ((srel & 0xfff) << 7);
1372 }
1373 else
1374 {
1375 if (!within_signed_range (srel, 5))
1376 {
1377 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1378 srel = 0;
1379 else
1380 return bfd_reloc_overflow;
1381 }
1382 opcode &= ~(0x3f << 8);
1383 opcode |= ((srel & 0x3f) << 8);
1384 }
1385
1386 bfd_put_32 (input_bfd, opcode, hit_data);
1387 break;
1388 case R_METAG_TLS_GD:
1389 case R_METAG_TLS_LDM:
1390 opcode = bfd_get_32 (input_bfd, hit_data);
1391
1392 if ((bfd_signed_vma)relocation < 0)
1393 {
1394 /* sign extend immediate */
1395 if ((opcode & 0xf2000001) == 0x02000000)
1396 {
1397 /* ADD De.e,Dx.r,#I16 */
1398 /* set SE bit */
1399 opcode |= (1 << 1);
1400 } else
1401 return bfd_reloc_overflow;
1402 }
1403
1404 bfd_put_32 (input_bfd, opcode, hit_data);
1405
1406 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1407 contents, rel->r_offset,
1408 relocation, rel->r_addend);
1409 break;
1410 default:
1411 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1412 contents, rel->r_offset,
1413 relocation, rel->r_addend);
1414 }
1415
1416 return r;
1417 }
1418
1419 /* This is defined because R_METAG_NONE != 0...
1420 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1421 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1422 rel, relend, howto, contents) \
1423 { \
1424 _bfd_clear_contents (howto, input_bfd, input_section, \
1425 contents + rel->r_offset); \
1426 \
1427 if (info->relocatable \
1428 && (input_section->flags & SEC_DEBUGGING)) \
1429 { \
1430 /* Only remove relocations in debug sections since other \
1431 sections may require relocations. */ \
1432 Elf_Internal_Shdr *rel_hdr; \
1433 \
1434 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1435 \
1436 /* Avoid empty output section. */ \
1437 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1438 { \
1439 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1440 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1441 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1442 \
1443 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1444 \
1445 input_section->reloc_count--; \
1446 relend--; \
1447 rel--; \
1448 continue; \
1449 } \
1450 } \
1451 \
1452 rel->r_info = R_METAG_NONE; \
1453 rel->r_addend = 0; \
1454 continue; \
1455 }
1456
1457 /* Relocate a META ELF section.
1458
1459 The RELOCATE_SECTION function is called by the new ELF backend linker
1460 to handle the relocations for a section.
1461
1462 The relocs are always passed as Rela structures; if the section
1463 actually uses Rel structures, the r_addend field will always be
1464 zero.
1465
1466 This function is responsible for adjusting the section contents as
1467 necessary, and (if using Rela relocs and generating a relocatable
1468 output file) adjusting the reloc addend as necessary.
1469
1470 This function does not have to worry about setting the reloc
1471 address or the reloc symbol index.
1472
1473 LOCAL_SYMS is a pointer to the swapped in local symbols.
1474
1475 LOCAL_SECTIONS is an array giving the section in the input file
1476 corresponding to the st_shndx field of each local symbol.
1477
1478 The global hash table entry for the global symbols can be found
1479 via elf_sym_hashes (input_bfd).
1480
1481 When generating relocatable output, this function must handle
1482 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1483 going to be the section symbol corresponding to the output
1484 section, which means that the addend must be adjusted
1485 accordingly. */
1486
1487 static bfd_boolean
1488 elf_metag_relocate_section (bfd *output_bfd,
1489 struct bfd_link_info *info,
1490 bfd *input_bfd,
1491 asection *input_section,
1492 bfd_byte *contents,
1493 Elf_Internal_Rela *relocs,
1494 Elf_Internal_Sym *local_syms,
1495 asection **local_sections)
1496 {
1497 bfd_vma *local_got_offsets;
1498 Elf_Internal_Shdr *symtab_hdr;
1499 struct elf_link_hash_entry **eh_syms;
1500 struct elf_metag_link_hash_table *htab;
1501 Elf_Internal_Rela *rel;
1502 Elf_Internal_Rela *relend;
1503 asection *sreloc;
1504
1505 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1506 eh_syms = elf_sym_hashes (input_bfd);
1507 relend = relocs + input_section->reloc_count;
1508
1509 htab = metag_link_hash_table (info);
1510 local_got_offsets = elf_local_got_offsets (input_bfd);
1511
1512 sreloc = NULL;
1513
1514 for (rel = relocs; rel < relend; rel ++)
1515 {
1516 reloc_howto_type *howto;
1517 unsigned long r_symndx;
1518 Elf_Internal_Sym *sym;
1519 asection *sec;
1520 struct elf_metag_link_hash_entry *hh;
1521 bfd_vma relocation;
1522 bfd_reloc_status_type r;
1523 const char *name;
1524 int r_type;
1525
1526 r_type = ELF32_R_TYPE (rel->r_info);
1527
1528 if (r_type == R_METAG_GNU_VTINHERIT
1529 || r_type == R_METAG_GNU_VTENTRY
1530 || r_type == R_METAG_NONE)
1531 continue;
1532
1533 r_symndx = ELF32_R_SYM (rel->r_info);
1534
1535 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1536 hh = NULL;
1537 sym = NULL;
1538 sec = NULL;
1539
1540 if (r_symndx < symtab_hdr->sh_info)
1541 {
1542 sym = local_syms + r_symndx;
1543 sec = local_sections [r_symndx];
1544 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1545
1546 name = bfd_elf_string_from_elf_section
1547 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1548 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1549 }
1550 else
1551 {
1552 struct elf_link_hash_entry *eh;
1553 bfd_boolean unresolved_reloc, warned;
1554
1555 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1556 r_symndx, symtab_hdr, eh_syms,
1557 eh, sec, relocation,
1558 unresolved_reloc, warned);
1559
1560 name = eh->root.root.string;
1561 hh = (struct elf_metag_link_hash_entry *) eh;
1562 }
1563
1564 if (sec != NULL && discarded_section (sec))
1565 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1566 rel, relend, howto, contents);
1567
1568 if (info->relocatable)
1569 continue;
1570
1571 switch (r_type)
1572 {
1573 case R_METAG_ADDR32:
1574 case R_METAG_RELBRANCH:
1575 if ((input_section->flags & SEC_ALLOC) == 0)
1576 break;
1577
1578 if ((info->shared
1579 && r_symndx != STN_UNDEF
1580 && (input_section->flags & SEC_ALLOC) != 0
1581 && (r_type != R_METAG_RELBRANCH
1582 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1583 || (!info->shared
1584 && hh != NULL
1585 && hh->eh.dynindx != -1
1586 && !hh->eh.non_got_ref
1587 && ((hh->eh.def_dynamic
1588 && !hh->eh.def_regular)
1589 || hh->eh.root.type == bfd_link_hash_undefweak
1590 || hh->eh.root.type == bfd_link_hash_undefined)))
1591 {
1592 Elf_Internal_Rela outrel;
1593 bfd_boolean skip, relocate;
1594 bfd_byte *loc;
1595
1596 /* When generating a shared object, these relocations
1597 are copied into the output file to be resolved at run
1598 time. */
1599
1600 sreloc = elf_section_data (input_section)->sreloc;
1601 BFD_ASSERT (sreloc != NULL);
1602
1603 skip = FALSE;
1604 relocate = FALSE;
1605
1606 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1607 info,
1608 input_section,
1609 rel->r_offset);
1610 if (outrel.r_offset == (bfd_vma) -1)
1611 skip = TRUE;
1612 else if (outrel.r_offset == (bfd_vma) -2)
1613 skip = TRUE, relocate = TRUE;
1614 outrel.r_offset += (input_section->output_section->vma
1615 + input_section->output_offset);
1616
1617 if (skip)
1618 {
1619 memset (&outrel, 0, sizeof outrel);
1620 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1621 }
1622 else if (r_type == R_METAG_RELBRANCH)
1623 {
1624 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1625 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1626 outrel.r_addend = rel->r_addend;
1627 }
1628 else
1629 {
1630 /* h->dynindx may be -1 if this symbol was marked to
1631 become local. */
1632 if (hh == NULL
1633 || ((info->symbolic || hh->eh.dynindx == -1)
1634 && hh->eh.def_regular))
1635 {
1636 relocate = TRUE;
1637 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1638 outrel.r_addend = relocation + rel->r_addend;
1639 }
1640 else
1641 {
1642 BFD_ASSERT (hh->eh.dynindx != -1);
1643 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1644 outrel.r_addend = rel->r_addend;
1645 }
1646 }
1647
1648 loc = sreloc->contents;
1649 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1650 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1651 ++sreloc->reloc_count;
1652
1653 /* If this reloc is against an external symbol, we do
1654 not want to fiddle with the addend. Otherwise, we
1655 need to include the symbol value so that it becomes
1656 an addend for the dynamic reloc. */
1657 if (! relocate)
1658 continue;
1659 }
1660 break;
1661
1662 case R_METAG_RELBRANCH_PLT:
1663 /* Relocation is to the entry for this symbol in the
1664 procedure linkage table. */
1665
1666 if (hh == NULL)
1667 break;
1668
1669 if (hh->eh.forced_local)
1670 break;
1671
1672 if (hh->eh.plt.offset == (bfd_vma) -1 ||
1673 htab->splt == NULL)
1674 {
1675 /* We didn't make a PLT entry for this symbol. This
1676 happens when statically linking PIC code, or when
1677 using -Bsymbolic. */
1678 break;
1679 }
1680
1681 relocation = (htab->splt->output_section->vma
1682 + htab->splt->output_offset
1683 + hh->eh.plt.offset);
1684 break;
1685 case R_METAG_HI16_GOTPC:
1686 case R_METAG_LO16_GOTPC:
1687 BFD_ASSERT (htab->sgot != NULL);
1688
1689 relocation = (htab->sgot->output_section->vma +
1690 htab->sgot->output_offset);
1691 relocation += GOT_REG_OFFSET;
1692 relocation -= (input_section->output_section->vma
1693 + input_section->output_offset
1694 + rel->r_offset);
1695 break;
1696 case R_METAG_HI16_GOTOFF:
1697 case R_METAG_LO16_GOTOFF:
1698 case R_METAG_GETSET_GOTOFF:
1699 BFD_ASSERT (htab->sgot != NULL);
1700
1701 relocation -= (htab->sgot->output_section->vma +
1702 htab->sgot->output_offset);
1703 relocation -= GOT_REG_OFFSET;
1704 break;
1705 case R_METAG_GETSET_GOT:
1706 {
1707 bfd_vma off;
1708 bfd_boolean do_got = 0;
1709
1710 /* Relocation is to the entry for this symbol in the
1711 global offset table. */
1712 if (hh != NULL)
1713 {
1714 bfd_boolean dyn;
1715
1716 off = hh->eh.got.offset;
1717 dyn = htab->etab.dynamic_sections_created;
1718 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
1719 &hh->eh))
1720 {
1721 /* If we aren't going to call finish_dynamic_symbol,
1722 then we need to handle initialisation of the .got
1723 entry and create needed relocs here. Since the
1724 offset must always be a multiple of 4, we use the
1725 least significant bit to record whether we have
1726 initialised it already. */
1727 if ((off & 1) != 0)
1728 off &= ~1;
1729 else
1730 {
1731 hh->eh.got.offset |= 1;
1732 do_got = 1;
1733 }
1734 }
1735 }
1736 else
1737 {
1738 /* Local symbol case. */
1739 if (local_got_offsets == NULL)
1740 abort ();
1741
1742 off = local_got_offsets[r_symndx];
1743
1744 /* The offset must always be a multiple of 4. We use
1745 the least significant bit to record whether we have
1746 already generated the necessary reloc. */
1747 if ((off & 1) != 0)
1748 off &= ~1;
1749 else
1750 {
1751 local_got_offsets[r_symndx] |= 1;
1752 do_got = 1;
1753 }
1754 }
1755
1756 if (do_got)
1757 {
1758 if (info->shared)
1759 {
1760 /* Output a dynamic relocation for this GOT entry.
1761 In this case it is relative to the base of the
1762 object because the symbol index is zero. */
1763 Elf_Internal_Rela outrel;
1764 bfd_byte *loc;
1765 asection *s = htab->srelgot;
1766
1767 outrel.r_offset = (off
1768 + htab->sgot->output_offset
1769 + htab->sgot->output_section->vma);
1770 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1771 outrel.r_addend = relocation;
1772 loc = s->contents;
1773 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1774 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1775 }
1776 else
1777 bfd_put_32 (output_bfd, relocation,
1778 htab->sgot->contents + off);
1779 }
1780
1781 if (off >= (bfd_vma) -2)
1782 abort ();
1783
1784 relocation = off - GOT_REG_OFFSET;
1785 }
1786 break;
1787 case R_METAG_TLS_GD:
1788 case R_METAG_TLS_IE:
1789 {
1790 /* XXXMJF There is room here for optimisations. For example
1791 converting from GD->IE, etc. */
1792 bfd_vma off;
1793 int indx;
1794 char tls_type;
1795
1796 if (htab->sgot == NULL)
1797 abort();
1798
1799 indx = 0;
1800 if (hh != NULL)
1801 {
1802 bfd_boolean dyn;
1803 dyn = htab->etab.dynamic_sections_created;
1804
1805 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, &hh->eh)
1806 && (!info->shared
1807 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1808 {
1809 indx = hh->eh.dynindx;
1810 }
1811 off = hh->eh.got.offset;
1812 tls_type = hh->tls_type;
1813 }
1814 else
1815 {
1816 /* Local symbol case. */
1817 if (local_got_offsets == NULL)
1818 abort ();
1819
1820 off = local_got_offsets[r_symndx];
1821 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1822 }
1823
1824 if (tls_type == GOT_UNKNOWN)
1825 abort();
1826
1827 if ((off & 1) != 0)
1828 off &= ~1;
1829 else
1830 {
1831 bfd_boolean need_relocs = FALSE;
1832 Elf_Internal_Rela outrel;
1833 bfd_byte *loc = NULL;
1834 int cur_off = off;
1835
1836 /* The GOT entries have not been initialized yet. Do it
1837 now, and emit any relocations. If both an IE GOT and a
1838 GD GOT are necessary, we emit the GD first. */
1839
1840 if ((info->shared || indx != 0)
1841 && (hh == NULL
1842 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1843 || hh->eh.root.type != bfd_link_hash_undefweak))
1844 {
1845 need_relocs = TRUE;
1846 loc = htab->srelgot->contents;
1847 /* FIXME (CAO): Should this be reloc_count++ ? */
1848 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
1849 }
1850
1851 if (tls_type & GOT_TLS_GD)
1852 {
1853 if (need_relocs)
1854 {
1855 outrel.r_offset = (cur_off
1856 + htab->sgot->output_section->vma
1857 + htab->sgot->output_offset);
1858 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1859 outrel.r_addend = 0;
1860 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
1861
1862 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1863 htab->srelgot->reloc_count++;
1864 loc += sizeof (Elf32_External_Rela);
1865
1866 if (indx == 0)
1867 bfd_put_32 (output_bfd, 0,
1868 htab->sgot->contents + cur_off + 4);
1869 else
1870 {
1871 bfd_put_32 (output_bfd, 0,
1872 htab->sgot->contents + cur_off + 4);
1873 outrel.r_info = ELF32_R_INFO (indx,
1874 R_METAG_TLS_DTPOFF);
1875 outrel.r_offset += 4;
1876 bfd_elf32_swap_reloca_out (output_bfd,
1877 &outrel, loc);
1878 htab->srelgot->reloc_count++;
1879 loc += sizeof (Elf32_External_Rela);
1880 }
1881 }
1882 else
1883 {
1884 /* We don't support changing the TLS model. */
1885 abort ();
1886 }
1887
1888 cur_off += 8;
1889 }
1890
1891 if (tls_type & GOT_TLS_IE)
1892 {
1893 if (need_relocs)
1894 {
1895 outrel.r_offset = (cur_off
1896 + htab->sgot->output_section->vma
1897 + htab->sgot->output_offset);
1898 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1899
1900 if (indx == 0)
1901 outrel.r_addend = relocation - dtpoff_base (info);
1902 else
1903 outrel.r_addend = 0;
1904
1905 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1906 htab->srelgot->reloc_count++;
1907 loc += sizeof (Elf32_External_Rela);
1908 }
1909 else
1910 bfd_put_32 (output_bfd, tpoff (info, relocation),
1911 htab->sgot->contents + cur_off);
1912
1913 cur_off += 4;
1914 }
1915
1916 if (hh != NULL)
1917 hh->eh.got.offset |= 1;
1918 else
1919 local_got_offsets[r_symndx] |= 1;
1920 }
1921
1922 /* Add the base of the GOT to the relocation value. */
1923 relocation = off - GOT_REG_OFFSET;
1924
1925 break;
1926 }
1927
1928 case R_METAG_TLS_IENONPIC_HI16:
1929 case R_METAG_TLS_IENONPIC_LO16:
1930 case R_METAG_TLS_LE_HI16:
1931 case R_METAG_TLS_LE_LO16:
1932 if (info->shared)
1933 {
1934 (*_bfd_error_handler)
1935 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1936 input_bfd, input_section,
1937 (long) rel->r_offset, howto->name);
1938 return FALSE;
1939 }
1940 else
1941 relocation = tpoff (info, relocation);
1942 break;
1943 case R_METAG_TLS_LDO_HI16:
1944 case R_METAG_TLS_LDO_LO16:
1945 if (! info->shared)
1946 relocation = tpoff (info, relocation);
1947 else
1948 relocation -= dtpoff_base (info);
1949 break;
1950 case R_METAG_TLS_LDM:
1951 {
1952 bfd_vma off;
1953
1954 if (htab->sgot == NULL)
1955 abort();
1956 off = htab->tls_ldm_got.offset;
1957 if (off & 1)
1958 off &= ~1;
1959 else
1960 {
1961 Elf_Internal_Rela outrel;
1962 bfd_byte *loc;
1963
1964 outrel.r_offset = (off
1965 + htab->sgot->output_section->vma
1966 + htab->sgot->output_offset);
1967
1968 outrel.r_addend = 0;
1969 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1970 loc = htab->srelgot->contents;
1971 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1972 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1973 htab->tls_ldm_got.offset |= 1;
1974 }
1975
1976 relocation = off - GOT_REG_OFFSET;
1977 break;
1978 }
1979 default:
1980 break;
1981 }
1982
1983 r = metag_final_link_relocate (howto, input_bfd, input_section,
1984 contents, rel, relocation, hh, htab,
1985 sec);
1986
1987 if (r != bfd_reloc_ok)
1988 {
1989 const char * msg = (const char *) NULL;
1990
1991 switch (r)
1992 {
1993 case bfd_reloc_overflow:
1994 r = info->callbacks->reloc_overflow
1995 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1996 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1997 break;
1998
1999 case bfd_reloc_undefined:
2000 r = info->callbacks->undefined_symbol
2001 (info, name, input_bfd, input_section, rel->r_offset,
2002 TRUE);
2003 break;
2004
2005 case bfd_reloc_outofrange:
2006 msg = _("internal error: out of range error");
2007 break;
2008
2009 case bfd_reloc_notsupported:
2010 msg = _("internal error: unsupported relocation error");
2011 break;
2012
2013 case bfd_reloc_dangerous:
2014 msg = _("internal error: dangerous relocation");
2015 break;
2016
2017 default:
2018 msg = _("internal error: unknown error");
2019 break;
2020 }
2021
2022 if (msg)
2023 r = info->callbacks->warning
2024 (info, msg, name, input_bfd, input_section, rel->r_offset);
2025
2026 if (! r)
2027 return FALSE;
2028 }
2029 }
2030
2031 return TRUE;
2032 }
2033
2034 /* Create the .plt and .got sections, and set up our hash table
2035 short-cuts to various dynamic sections. */
2036
2037 static bfd_boolean
2038 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2039 {
2040 struct elf_metag_link_hash_table *htab;
2041 struct elf_link_hash_entry *eh;
2042 struct bfd_link_hash_entry *bh;
2043 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2044
2045 /* Don't try to create the .plt and .got twice. */
2046 htab = metag_link_hash_table (info);
2047 if (htab->splt != NULL)
2048 return TRUE;
2049
2050 /* Call the generic code to do most of the work. */
2051 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2052 return FALSE;
2053
2054 htab->sgot = bfd_get_section_by_name (abfd, ".got");
2055 if (! htab->sgot)
2056 return FALSE;
2057
2058 htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt",
2059 (SEC_ALLOC | SEC_LOAD |
2060 SEC_HAS_CONTENTS |
2061 SEC_IN_MEMORY |
2062 SEC_LINKER_CREATED));
2063 if (htab->sgotplt == NULL
2064 || !bfd_set_section_alignment (abfd, htab->sgotplt, 2))
2065 return FALSE;
2066
2067 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2068 section. We don't do this in the linker script because we don't want
2069 to define the symbol if we are not creating a global offset table. */
2070 bh = NULL;
2071 if (!(_bfd_generic_link_add_one_symbol
2072 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot,
2073 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2074 return FALSE;
2075 eh = (struct elf_link_hash_entry *) bh;
2076 eh->def_regular = 1;
2077 eh->type = STT_OBJECT;
2078 eh->other = STV_HIDDEN;
2079
2080 if (! info->executable
2081 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2082 return FALSE;
2083
2084 elf_hash_table (info)->hgot = eh;
2085
2086 htab->splt = bfd_get_section_by_name (abfd, ".plt");
2087 htab->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
2088
2089 htab->srelgot = bfd_get_section_by_name (abfd, ".rela.got");
2090
2091 htab->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
2092 htab->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
2093
2094 return TRUE;
2095 }
2096
2097 /* Look through the relocs for a section during the first phase, and
2098 calculate needed space in the global offset table, procedure linkage
2099 table, and dynamic reloc sections. At this point we haven't
2100 necessarily read all the input files. */
2101
2102 static bfd_boolean
2103 elf_metag_check_relocs (bfd *abfd,
2104 struct bfd_link_info *info,
2105 asection *sec,
2106 const Elf_Internal_Rela *relocs)
2107 {
2108 Elf_Internal_Shdr *symtab_hdr;
2109 struct elf_link_hash_entry **eh_syms;
2110 const Elf_Internal_Rela *rel;
2111 const Elf_Internal_Rela *rel_end;
2112 struct elf_metag_link_hash_table *htab;
2113 asection *sreloc;
2114 bfd *dynobj;
2115 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2116
2117 if (info->relocatable)
2118 return TRUE;
2119
2120 htab = metag_link_hash_table (info);
2121 dynobj = htab->etab.dynobj;
2122 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2123 eh_syms = elf_sym_hashes (abfd);
2124 sreloc = NULL;
2125
2126 if (htab == NULL)
2127 return FALSE;
2128
2129 rel_end = relocs + sec->reloc_count;
2130 for (rel = relocs; rel < rel_end; rel++)
2131 {
2132 int r_type;
2133 struct elf_metag_link_hash_entry *hh;
2134 Elf_Internal_Sym *isym;
2135 unsigned long r_symndx;
2136
2137 r_symndx = ELF32_R_SYM (rel->r_info);
2138 r_type = ELF32_R_TYPE (rel->r_info);
2139 if (r_symndx < symtab_hdr->sh_info)
2140 {
2141 /* A local symbol. */
2142 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2143 abfd, r_symndx);
2144 if (isym == NULL)
2145 return FALSE;
2146
2147 hh = NULL;
2148 }
2149 else
2150 {
2151 isym = NULL;
2152
2153 hh = (struct elf_metag_link_hash_entry *)
2154 eh_syms[r_symndx - symtab_hdr->sh_info];
2155 while (hh->eh.root.type == bfd_link_hash_indirect
2156 || hh->eh.root.type == bfd_link_hash_warning)
2157 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2158 }
2159
2160 /* Some relocs require a global offset table. */
2161 if (htab->sgot == NULL)
2162 {
2163 switch (r_type)
2164 {
2165 case R_METAG_TLS_GD:
2166 case R_METAG_TLS_LDM:
2167 case R_METAG_TLS_IE:
2168 if (info->shared)
2169 info->flags |= DF_STATIC_TLS;
2170 /* Fall through. */
2171
2172 case R_METAG_HI16_GOTOFF:
2173 case R_METAG_LO16_GOTOFF:
2174 case R_METAG_GETSET_GOTOFF:
2175 case R_METAG_GETSET_GOT:
2176 case R_METAG_HI16_GOTPC:
2177 case R_METAG_LO16_GOTPC:
2178 if (dynobj == NULL)
2179 htab->etab.dynobj = dynobj = abfd;
2180 if (!elf_metag_create_dynamic_sections (dynobj, info))
2181 return FALSE;
2182 break;
2183
2184 default:
2185 break;
2186 }
2187 }
2188
2189 switch (r_type)
2190 {
2191 case R_METAG_TLS_IE:
2192 case R_METAG_TLS_GD:
2193 case R_METAG_GETSET_GOT:
2194 switch (r_type)
2195 {
2196 default:
2197 tls_type = GOT_NORMAL;
2198 break;
2199 case R_METAG_TLS_IE:
2200 tls_type = GOT_TLS_IE;
2201 break;
2202 case R_METAG_TLS_GD:
2203 tls_type = GOT_TLS_GD;
2204 break;
2205 }
2206
2207 if (hh != NULL)
2208 {
2209 hh->eh.got.refcount += 1;
2210 old_tls_type = hh->tls_type;
2211 }
2212 else
2213 {
2214 bfd_signed_vma *local_got_refcounts;
2215
2216 /* This is a global offset table entry for a local
2217 symbol. */
2218 local_got_refcounts = elf_local_got_refcounts (abfd);
2219 if (local_got_refcounts == NULL)
2220 {
2221 bfd_size_type size;
2222
2223 size = symtab_hdr->sh_info;
2224 size *= sizeof (bfd_signed_vma);
2225 /* Add in space to store the local GOT TLS types. */
2226 size += symtab_hdr->sh_info;
2227 local_got_refcounts = ((bfd_signed_vma *)
2228 bfd_zalloc (abfd, size));
2229 if (local_got_refcounts == NULL)
2230 return FALSE;
2231 elf_local_got_refcounts (abfd) = local_got_refcounts;
2232 memset (metag_elf_local_got_tls_type (abfd),
2233 GOT_UNKNOWN, symtab_hdr->sh_info);
2234 }
2235 local_got_refcounts[r_symndx] += 1;
2236 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2237 }
2238
2239 if (old_tls_type != tls_type)
2240 {
2241 if (hh != NULL)
2242 {
2243 hh->tls_type = tls_type;
2244 }
2245 else
2246 {
2247 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2248 }
2249 }
2250
2251 break;
2252
2253 case R_METAG_TLS_LDM:
2254 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2255 break;
2256
2257 case R_METAG_RELBRANCH_PLT:
2258 /* This symbol requires a procedure linkage table entry. We
2259 actually build the entry in adjust_dynamic_symbol,
2260 because this might be a case of linking PIC code without
2261 linking in any dynamic objects, in which case we don't
2262 need to generate a procedure linkage table after all. */
2263
2264 /* If this is a local symbol, we resolve it directly without
2265 creating a procedure linkage table entry. */
2266 if (hh == NULL)
2267 continue;
2268
2269 if (hh->eh.forced_local)
2270 break;
2271
2272 hh->eh.needs_plt = 1;
2273 hh->eh.plt.refcount += 1;
2274 break;
2275
2276 case R_METAG_HIADDR16:
2277 case R_METAG_LOADDR16:
2278 /* Let's help debug shared library creation. These relocs
2279 cannot be used in shared libs. Don't error out for
2280 sections we don't care about, such as debug sections or
2281 non-constant sections. */
2282 if (info->shared
2283 && (sec->flags & SEC_ALLOC) != 0
2284 && (sec->flags & SEC_READONLY) != 0)
2285 {
2286 const char *name;
2287
2288 if (hh)
2289 name = hh->eh.root.root.string;
2290 else
2291 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2292 (*_bfd_error_handler)
2293 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2294 abfd, elf_metag_howto_table[r_type].name, name);
2295 bfd_set_error (bfd_error_bad_value);
2296 return FALSE;
2297 }
2298
2299 /* Fall through. */
2300 case R_METAG_ADDR32:
2301 case R_METAG_RELBRANCH:
2302 case R_METAG_GETSETOFF:
2303 if (hh != NULL && !info->shared)
2304 {
2305 hh->eh.non_got_ref = 1;
2306 hh->eh.plt.refcount += 1;
2307 }
2308
2309 /* If we are creating a shared library, and this is a reloc
2310 against a global symbol, or a non PC relative reloc
2311 against a local symbol, then we need to copy the reloc
2312 into the shared library. However, if we are linking with
2313 -Bsymbolic, we do not need to copy a reloc against a
2314 global symbol which is defined in an object we are
2315 including in the link (i.e., DEF_REGULAR is set). At
2316 this point we have not seen all the input files, so it is
2317 possible that DEF_REGULAR is not set now but will be set
2318 later (it is never cleared). We account for that
2319 possibility below by storing information in the
2320 dyn_relocs field of the hash table entry. A similar
2321 situation occurs when creating shared libraries and symbol
2322 visibility changes render the symbol local.
2323
2324 If on the other hand, we are creating an executable, we
2325 may need to keep relocations for symbols satisfied by a
2326 dynamic library if we manage to avoid copy relocs for the
2327 symbol. */
2328 if ((info->shared
2329 && (sec->flags & SEC_ALLOC) != 0
2330 && (r_type != R_METAG_RELBRANCH
2331 || (hh != NULL
2332 && (! info->symbolic
2333 || hh->eh.root.type == bfd_link_hash_defweak
2334 || !hh->eh.def_regular))))
2335 || (!info->shared
2336 && (sec->flags & SEC_ALLOC) != 0
2337 && hh != NULL
2338 && (hh->eh.root.type == bfd_link_hash_defweak
2339 || !hh->eh.def_regular)))
2340 {
2341 struct elf_metag_dyn_reloc_entry *hdh_p;
2342 struct elf_metag_dyn_reloc_entry **hdh_head;
2343
2344 if (dynobj == NULL)
2345 htab->etab.dynobj = dynobj = abfd;
2346
2347 /* When creating a shared object, we must copy these
2348 relocs into the output file. We create a reloc
2349 section in dynobj and make room for the reloc. */
2350 if (sreloc == NULL)
2351 {
2352 sreloc = _bfd_elf_make_dynamic_reloc_section
2353 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2354
2355 if (sreloc == NULL)
2356 {
2357 bfd_set_error (bfd_error_bad_value);
2358 return FALSE;
2359 }
2360
2361 elf_section_data (sec)->sreloc = sreloc;
2362 }
2363
2364 /* If this is a global symbol, we count the number of
2365 relocations we need for this symbol. */
2366 if (hh != NULL)
2367 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2368 else
2369 {
2370 /* Track dynamic relocs needed for local syms too. */
2371 asection *sr;
2372 void *vpp;
2373
2374 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2375 if (sr == NULL)
2376 sr = sec;
2377
2378 vpp = &elf_section_data (sr)->local_dynrel;
2379 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2380 }
2381
2382 hdh_p = *hdh_head;
2383 if (hdh_p == NULL || hdh_p->sec != sec)
2384 {
2385 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2386 bfd_alloc (dynobj, sizeof *hdh_p));
2387 if (hdh_p == NULL)
2388 return FALSE;
2389 hdh_p->hdh_next = *hdh_head;
2390 *hdh_head = hdh_p;
2391 hdh_p->sec = sec;
2392 hdh_p->count = 0;
2393 hdh_p->relative_count = 0;
2394 }
2395
2396 hdh_p->count += 1;
2397 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2398 hdh_p->relative_count += 1;
2399 }
2400 break;
2401
2402 /* This relocation describes the C++ object vtable hierarchy.
2403 Reconstruct it for later use during GC. */
2404 case R_METAG_GNU_VTINHERIT:
2405 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2406 rel->r_offset))
2407 return FALSE;
2408 break;
2409
2410 /* This relocation describes which C++ vtable entries are actually
2411 used. Record for later use during GC. */
2412 case R_METAG_GNU_VTENTRY:
2413 BFD_ASSERT (hh != NULL);
2414 if (hh != NULL
2415 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2416 return FALSE;
2417 break;
2418 }
2419 }
2420
2421 return TRUE;
2422 }
2423
2424 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2425
2426 static void
2427 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2428 struct elf_link_hash_entry *eh_dir,
2429 struct elf_link_hash_entry *eh_ind)
2430 {
2431 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2432
2433 hh_dir = metag_elf_hash_entry (eh_dir);
2434 hh_ind = metag_elf_hash_entry (eh_ind);
2435
2436 if (hh_ind->dyn_relocs != NULL)
2437 {
2438 if (hh_dir->dyn_relocs != NULL)
2439 {
2440 struct elf_metag_dyn_reloc_entry **hdh_pp;
2441 struct elf_metag_dyn_reloc_entry *hdh_p;
2442
2443 if (eh_ind->root.type == bfd_link_hash_indirect)
2444 abort ();
2445
2446 /* Add reloc counts against the weak sym to the strong sym
2447 list. Merge any entries against the same section. */
2448 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2449 {
2450 struct elf_metag_dyn_reloc_entry *hdh_q;
2451
2452 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2453 hdh_q = hdh_q->hdh_next)
2454 if (hdh_q->sec == hdh_p->sec)
2455 {
2456 hdh_q->relative_count += hdh_p->relative_count;
2457 hdh_q->count += hdh_p->count;
2458 *hdh_pp = hdh_p->hdh_next;
2459 break;
2460 }
2461 if (hdh_q == NULL)
2462 hdh_pp = &hdh_p->hdh_next;
2463 }
2464 *hdh_pp = hh_dir->dyn_relocs;
2465 }
2466
2467 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2468 hh_ind->dyn_relocs = NULL;
2469 }
2470
2471 if (eh_ind->root.type == bfd_link_hash_indirect
2472 && eh_dir->got.refcount <= 0)
2473 {
2474 hh_dir->tls_type = hh_ind->tls_type;
2475 hh_ind->tls_type = GOT_UNKNOWN;
2476 }
2477
2478 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2479 }
2480
2481 /* Adjust a symbol defined by a dynamic object and referenced by a
2482 regular object. The current definition is in some section of the
2483 dynamic object, but we're not including those sections. We have to
2484 change the definition to something the rest of the link can
2485 understand. */
2486
2487 static bfd_boolean
2488 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2489 struct elf_link_hash_entry *eh)
2490 {
2491 struct elf_metag_link_hash_table *htab;
2492 struct elf_metag_link_hash_entry *hh;
2493 struct elf_metag_dyn_reloc_entry *hdh_p;
2494 asection *s;
2495
2496 /* If this is a function, put it in the procedure linkage table. We
2497 will fill in the contents of the procedure linkage table later,
2498 when we know the address of the .got section. */
2499 if (eh->type == STT_FUNC
2500 || eh->needs_plt)
2501 {
2502 if (eh->plt.refcount <= 0
2503 || SYMBOL_CALLS_LOCAL (info, eh)
2504 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2505 && eh->root.type == bfd_link_hash_undefweak))
2506 {
2507 /* This case can occur if we saw a PLT reloc in an input
2508 file, but the symbol was never referred to by a dynamic
2509 object. In such a case, we don't actually need to build
2510 a procedure linkage table, and we can just do a PCREL
2511 reloc instead. */
2512 eh->plt.offset = (bfd_vma) -1;
2513 eh->needs_plt = 0;
2514 }
2515
2516 return TRUE;
2517 }
2518 else
2519 eh->plt.offset = (bfd_vma) -1;
2520
2521 /* If this is a weak symbol, and there is a real definition, the
2522 processor independent code will have arranged for us to see the
2523 real definition first, and we can just use the same value. */
2524 if (eh->u.weakdef != NULL)
2525 {
2526 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2527 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2528 abort ();
2529 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2530 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2531 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2532 return TRUE;
2533 }
2534
2535 /* This is a reference to a symbol defined by a dynamic object which
2536 is not a function. */
2537
2538 /* If we are creating a shared library, we must presume that the
2539 only references to the symbol are via the global offset table.
2540 For such cases we need not do anything here; the relocations will
2541 be handled correctly by relocate_section. */
2542 if (info->shared)
2543 return TRUE;
2544
2545 /* If there are no references to this symbol that do not use the
2546 GOT, we don't need to generate a copy reloc. */
2547 if (!eh->non_got_ref)
2548 return TRUE;
2549
2550 /* If -z nocopyreloc was given, we won't generate them either. */
2551 if (info->nocopyreloc)
2552 {
2553 eh->non_got_ref = 0;
2554 return TRUE;
2555 }
2556
2557 hh = (struct elf_metag_link_hash_entry *) eh;
2558 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2559 {
2560 s = hdh_p->sec->output_section;
2561 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2562 break;
2563 }
2564
2565 /* If we didn't find any dynamic relocs in read-only sections, then
2566 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2567 if (hdh_p == NULL)
2568 {
2569 eh->non_got_ref = 0;
2570 return TRUE;
2571 }
2572
2573 if (eh->size == 0)
2574 {
2575 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2576 hh->eh.root.root.string);
2577 return TRUE;
2578 }
2579
2580 /* We must allocate the symbol in our .dynbss section, which will
2581 become part of the .bss section of the executable. There will be
2582 an entry for this symbol in the .dynsym section. The dynamic
2583 object will contain position independent code, so all references
2584 from the dynamic object to this symbol will go through the global
2585 offset table. The dynamic linker will use the .dynsym entry to
2586 determine the address it must put in the global offset table, so
2587 both the dynamic object and the regular object will refer to the
2588 same memory location for the variable. */
2589
2590 htab = metag_link_hash_table (info);
2591
2592 /* We must generate a COPY reloc to tell the dynamic linker to
2593 copy the initial value out of the dynamic object and into the
2594 runtime process image. */
2595 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0)
2596 {
2597 htab->srelbss->size += sizeof (Elf32_External_Rela);
2598 eh->needs_copy = 1;
2599 }
2600
2601 s = htab->sdynbss;
2602
2603 return _bfd_elf_adjust_dynamic_copy (eh, s);
2604 }
2605
2606 /* Allocate space in .plt, .got and associated reloc sections for
2607 global syms. */
2608
2609 static bfd_boolean
2610 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2611 {
2612 struct bfd_link_info *info;
2613 struct elf_metag_link_hash_table *htab;
2614 struct elf_metag_link_hash_entry *hh;
2615 struct elf_metag_dyn_reloc_entry *hdh_p;
2616
2617 if (eh->root.type == bfd_link_hash_indirect)
2618 return TRUE;
2619
2620 if (eh->root.type == bfd_link_hash_warning)
2621 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2622
2623 info = inf;
2624 htab = metag_link_hash_table (info);
2625
2626 if (htab->etab.dynamic_sections_created
2627 && eh->plt.refcount > 0)
2628 {
2629 /* Make sure this symbol is output as a dynamic symbol.
2630 Undefined weak syms won't yet be marked as dynamic. */
2631 if (eh->dynindx == -1
2632 && !eh->forced_local)
2633 {
2634 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2635 return FALSE;
2636 }
2637
2638 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, eh))
2639 {
2640 asection *s = htab->splt;
2641
2642 /* If this is the first .plt entry, make room for the special
2643 first entry. */
2644 if (s->size == 0)
2645 s->size += PLT_ENTRY_SIZE;
2646
2647 eh->plt.offset = s->size;
2648
2649 /* If this symbol is not defined in a regular file, and we are
2650 not generating a shared library, then set the symbol to this
2651 location in the .plt. This is required to make function
2652 pointers compare as equal between the normal executable and
2653 the shared library. */
2654 if (! info->shared
2655 && !eh->def_regular)
2656 {
2657 eh->root.u.def.section = s;
2658 eh->root.u.def.value = eh->plt.offset;
2659 }
2660
2661 /* Make room for this entry. */
2662 s->size += PLT_ENTRY_SIZE;
2663
2664 /* We also need to make an entry in the .got.plt section, which
2665 will be placed in the .got section by the linker script. */
2666 htab->sgotplt->size += 4;
2667
2668 /* We also need to make an entry in the .rel.plt section. */
2669 htab->srelplt->size += sizeof (Elf32_External_Rela);
2670 }
2671 else
2672 {
2673 eh->plt.offset = (bfd_vma) -1;
2674 eh->needs_plt = 0;
2675 }
2676 }
2677 else
2678 {
2679 eh->plt.offset = (bfd_vma) -1;
2680 eh->needs_plt = 0;
2681 }
2682
2683 if (eh->got.refcount > 0)
2684 {
2685 asection *s;
2686 bfd_boolean dyn;
2687 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2688
2689 /* Make sure this symbol is output as a dynamic symbol.
2690 Undefined weak syms won't yet be marked as dynamic. */
2691 if (eh->dynindx == -1
2692 && !eh->forced_local)
2693 {
2694 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2695 return FALSE;
2696 }
2697
2698 s = htab->sgot;
2699
2700 eh->got.offset = s->size;
2701 s->size += 4;
2702 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2703 if (tls_type == GOT_TLS_GD)
2704 s->size += 4;
2705 dyn = htab->etab.dynamic_sections_created;
2706 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2707 R_METAG_TLS_GD needs one if local symbol and two if global. */
2708 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2709 || (tls_type == GOT_TLS_IE && dyn))
2710 htab->srelgot->size += sizeof (Elf32_External_Rela);
2711 else if (tls_type == GOT_TLS_GD)
2712 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2713 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, eh))
2714 htab->srelgot->size += sizeof (Elf32_External_Rela);
2715 }
2716 else
2717 eh->got.offset = (bfd_vma) -1;
2718
2719 hh = (struct elf_metag_link_hash_entry *) eh;
2720 if (hh->dyn_relocs == NULL)
2721 return TRUE;
2722
2723 /* If this is a -Bsymbolic shared link, then we need to discard all
2724 space allocated for dynamic pc-relative relocs against symbols
2725 defined in a regular object. For the normal shared case, discard
2726 space for relocs that have become local due to symbol visibility
2727 changes. */
2728 if (info->shared)
2729 {
2730 if (SYMBOL_CALLS_LOCAL (info, eh))
2731 {
2732 struct elf_metag_dyn_reloc_entry **hdh_pp;
2733
2734 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2735 {
2736 hdh_p->count -= hdh_p->relative_count;
2737 hdh_p->relative_count = 0;
2738 if (hdh_p->count == 0)
2739 *hdh_pp = hdh_p->hdh_next;
2740 else
2741 hdh_pp = &hdh_p->hdh_next;
2742 }
2743 }
2744
2745 /* Also discard relocs on undefined weak syms with non-default
2746 visibility. */
2747 if (hh->dyn_relocs != NULL
2748 && eh->root.type == bfd_link_hash_undefweak)
2749 {
2750 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2751 hh->dyn_relocs = NULL;
2752
2753 /* Make sure undefined weak symbols are output as a dynamic
2754 symbol in PIEs. */
2755 else if (eh->dynindx == -1
2756 && !eh->forced_local)
2757 {
2758 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2759 return FALSE;
2760 }
2761 }
2762 }
2763 else
2764 {
2765 /* For the non-shared case, discard space for relocs against
2766 symbols which turn out to need copy relocs or are not
2767 dynamic. */
2768 if (!eh->non_got_ref
2769 && ((eh->def_dynamic
2770 && !eh->def_regular)
2771 || (htab->etab.dynamic_sections_created
2772 && (eh->root.type == bfd_link_hash_undefweak
2773 || eh->root.type == bfd_link_hash_undefined))))
2774 {
2775 /* Make sure this symbol is output as a dynamic symbol.
2776 Undefined weak syms won't yet be marked as dynamic. */
2777 if (eh->dynindx == -1
2778 && !eh->forced_local)
2779 {
2780 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2781 return FALSE;
2782 }
2783
2784 /* If that succeeded, we know we'll be keeping all the
2785 relocs. */
2786 if (eh->dynindx != -1)
2787 goto keep;
2788 }
2789
2790 hh->dyn_relocs = NULL;
2791 return TRUE;
2792
2793 keep: ;
2794 }
2795
2796 /* Finally, allocate space. */
2797 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2798 {
2799 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2800 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2801 }
2802
2803 return TRUE;
2804 }
2805
2806 /* Find any dynamic relocs that apply to read-only sections. */
2807
2808 static bfd_boolean
2809 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2810 {
2811 struct elf_metag_link_hash_entry *hh;
2812 struct elf_metag_dyn_reloc_entry *hdh_p;
2813
2814 if (eh->root.type == bfd_link_hash_warning)
2815 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2816
2817 hh = (struct elf_metag_link_hash_entry *) eh;
2818 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2819 {
2820 asection *s = hdh_p->sec->output_section;
2821
2822 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2823 {
2824 struct bfd_link_info *info = inf;
2825
2826 info->flags |= DF_TEXTREL;
2827
2828 /* Not an error, just cut short the traversal. */
2829 return FALSE;
2830 }
2831 }
2832 return TRUE;
2833 }
2834
2835 /* Set the sizes of the dynamic sections. */
2836
2837 static bfd_boolean
2838 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2839 struct bfd_link_info *info)
2840 {
2841 struct elf_metag_link_hash_table *htab;
2842 bfd *dynobj;
2843 bfd *ibfd;
2844 asection *s;
2845 bfd_boolean relocs;
2846
2847 htab = metag_link_hash_table (info);
2848 dynobj = htab->etab.dynobj;
2849 if (dynobj == NULL)
2850 abort ();
2851
2852 if (htab->etab.dynamic_sections_created)
2853 {
2854 /* Set the contents of the .interp section to the interpreter. */
2855 if (info->executable)
2856 {
2857 s = bfd_get_section_by_name (dynobj, ".interp");
2858 if (s == NULL)
2859 abort ();
2860 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2861 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2862 }
2863 }
2864
2865 /* Set up .got offsets for local syms, and space for local dynamic
2866 relocs. */
2867 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2868 {
2869 bfd_signed_vma *local_got;
2870 bfd_signed_vma *end_local_got;
2871 bfd_size_type locsymcount;
2872 Elf_Internal_Shdr *symtab_hdr;
2873 asection *srel;
2874 char *local_tls_type;
2875
2876 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2877 continue;
2878
2879 for (s = ibfd->sections; s != NULL; s = s->next)
2880 {
2881 struct elf_metag_dyn_reloc_entry *hdh_p;
2882
2883 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2884 elf_section_data (s)->local_dynrel);
2885 hdh_p != NULL;
2886 hdh_p = hdh_p->hdh_next)
2887 {
2888 if (!bfd_is_abs_section (hdh_p->sec)
2889 && bfd_is_abs_section (hdh_p->sec->output_section))
2890 {
2891 /* Input section has been discarded, either because
2892 it is a copy of a linkonce section or due to
2893 linker script /DISCARD/, so we'll be discarding
2894 the relocs too. */
2895 }
2896 else if (hdh_p->count != 0)
2897 {
2898 srel = elf_section_data (hdh_p->sec)->sreloc;
2899 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2900 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2901 info->flags |= DF_TEXTREL;
2902 }
2903 }
2904 }
2905
2906 local_got = elf_local_got_refcounts (ibfd);
2907 if (!local_got)
2908 continue;
2909
2910 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2911 locsymcount = symtab_hdr->sh_info;
2912 end_local_got = local_got + locsymcount;
2913 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2914 s = htab->sgot;
2915 srel = htab->srelgot;
2916 for (; local_got < end_local_got; ++local_got)
2917 {
2918 if (*local_got > 0)
2919 {
2920 *local_got = s->size;
2921 s->size += GOT_ENTRY_SIZE;
2922 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2923 if (*local_tls_type == GOT_TLS_GD)
2924 s->size += 4;
2925 if (info->shared)
2926 srel->size += sizeof (Elf32_External_Rela);
2927 }
2928 else
2929 *local_got = (bfd_vma) -1;
2930 ++local_tls_type;
2931 }
2932 }
2933
2934 if (htab->tls_ldm_got.refcount > 0)
2935 {
2936 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2937 reloc. */
2938 htab->tls_ldm_got.offset = htab->sgot->size;
2939 htab->sgot->size += 8;
2940 htab->srelgot->size += sizeof (Elf32_External_Rela);
2941 }
2942 else
2943 htab->tls_ldm_got.offset = -1;
2944
2945 /* Allocate global sym .plt and .got entries, and space for global
2946 sym dynamic relocs. */
2947 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2948
2949 /* We now have determined the sizes of the various dynamic sections.
2950 Allocate memory for them. */
2951 relocs = FALSE;
2952 for (s = dynobj->sections; s != NULL; s = s->next)
2953 {
2954 bfd_boolean reloc_section = FALSE;
2955
2956 if ((s->flags & SEC_LINKER_CREATED) == 0)
2957 continue;
2958
2959 if (s == htab->splt
2960 || s == htab->sgot
2961 || s == htab->sgotplt
2962 || s == htab->sdynbss)
2963 {
2964 /* Strip this section if we don't need it; see the
2965 comment below. */
2966 }
2967 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2968 {
2969 if (s->size != 0 && s != htab->srelplt)
2970 relocs = TRUE;
2971
2972 /* We use the reloc_count field as a counter if we need
2973 to copy relocs into the output file. */
2974 s->reloc_count = 0;
2975 reloc_section = TRUE;
2976 }
2977 else
2978 {
2979 /* It's not one of our sections, so don't allocate space. */
2980 continue;
2981 }
2982
2983 if (s->size == 0)
2984 {
2985 /* If we don't need this section, strip it from the
2986 output file. This is mostly to handle .rela.bss and
2987 .rela.plt. We must create both sections in
2988 create_dynamic_sections, because they must be created
2989 before the linker maps input sections to output
2990 sections. The linker does that before
2991 adjust_dynamic_symbol is called, and it is that
2992 function which decides whether anything needs to go
2993 into these sections. */
2994 s->flags |= SEC_EXCLUDE;
2995 continue;
2996 }
2997
2998 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2999 continue;
3000
3001 /* Allocate memory for the section contents. */
3002 s->contents = bfd_zalloc (dynobj, s->size);
3003 if (s->contents == NULL)
3004 return FALSE;
3005 else if (reloc_section)
3006 {
3007 unsigned char *contents = s->contents;
3008 Elf32_External_Rela reloc;
3009
3010 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3011 memset(&reloc, 0, sizeof(Elf32_External_Rela));
3012 reloc.r_info[0] = R_METAG_NONE;
3013 for (; contents < (s->contents + s->size);
3014 contents += sizeof(Elf32_External_Rela))
3015 {
3016 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3017 }
3018 }
3019 }
3020
3021 if (htab->etab.dynamic_sections_created)
3022 {
3023 /* Add some entries to the .dynamic section. We fill in the
3024 values later, in elf_metag_finish_dynamic_sections, but we
3025 must add the entries now so that we get the correct size for
3026 the .dynamic section. The DT_DEBUG entry is filled in by the
3027 dynamic linker and used by the debugger. */
3028 #define add_dynamic_entry(TAG, VAL) \
3029 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3030
3031 if (!add_dynamic_entry (DT_PLTGOT, 0))
3032 return FALSE;
3033
3034 if (info->executable)
3035 {
3036 if (!add_dynamic_entry (DT_DEBUG, 0))
3037 return FALSE;
3038 }
3039
3040 if (htab->srelplt->size != 0)
3041 {
3042 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3043 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3044 || !add_dynamic_entry (DT_JMPREL, 0))
3045 return FALSE;
3046 }
3047
3048 if (relocs)
3049 {
3050 if (!add_dynamic_entry (DT_RELA, 0)
3051 || !add_dynamic_entry (DT_RELASZ, 0)
3052 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3053 return FALSE;
3054
3055 /* If any dynamic relocs apply to a read-only section,
3056 then we need a DT_TEXTREL entry. */
3057 if ((info->flags & DF_TEXTREL) == 0)
3058 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3059
3060 if ((info->flags & DF_TEXTREL) != 0)
3061 {
3062 if (!add_dynamic_entry (DT_TEXTREL, 0))
3063 return FALSE;
3064 }
3065 }
3066 }
3067 #undef add_dynamic_entry
3068
3069 return TRUE;
3070 }
3071
3072 /* Finish up dynamic symbol handling. We set the contents of various
3073 dynamic sections here. */
3074
3075 static bfd_boolean
3076 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3077 struct bfd_link_info *info,
3078 struct elf_link_hash_entry *eh,
3079 Elf_Internal_Sym *sym)
3080 {
3081 struct elf_metag_link_hash_table *htab;
3082 Elf_Internal_Rela rel;
3083 bfd_byte *loc;
3084
3085 htab = metag_link_hash_table (info);
3086
3087 if (eh->plt.offset != (bfd_vma) -1)
3088 {
3089 asection *splt;
3090 asection *sgot;
3091 asection *srela;
3092
3093 bfd_vma plt_index;
3094 bfd_vma got_offset;
3095 bfd_vma got_entry;
3096
3097 if (eh->plt.offset & 1)
3098 abort ();
3099
3100 BFD_ASSERT (eh->dynindx != -1);
3101
3102 splt = htab->splt;
3103 sgot = htab->sgotplt;
3104 srela = htab->srelplt;
3105 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3106
3107 /* Get the index in the procedure linkage table which
3108 corresponds to this symbol. This is the index of this symbol
3109 in all the symbols for which we are making plt entries. The
3110 first entry in the procedure linkage table is reserved. */
3111 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3112
3113 /* Get the offset into the .got.plt table of the entry that
3114 corresponds to this function. */
3115 got_offset = plt_index * GOT_ENTRY_SIZE;
3116
3117 BFD_ASSERT (got_offset < (1 << 16));
3118
3119 got_entry = sgot->output_section->vma
3120 + sgot->output_offset
3121 + got_offset;
3122
3123 BFD_ASSERT (plt_index < (1 << 16));
3124
3125 /* Fill in the entry in the procedure linkage table. */
3126 if (! info->shared)
3127 {
3128 bfd_put_32 (output_bfd,
3129 (plt_entry[0]
3130 | (((got_entry >> 16) & 0xffff) << 3)),
3131 splt->contents + eh->plt.offset);
3132 bfd_put_32 (output_bfd,
3133 (plt_entry[1]
3134 | ((got_entry & 0xffff) << 3)),
3135 splt->contents + eh->plt.offset + 4);
3136 bfd_put_32 (output_bfd, plt_entry[2],
3137 splt->contents + eh->plt.offset + 8);
3138 bfd_put_32 (output_bfd,
3139 (plt_entry[3] | (plt_index << 3)),
3140 splt->contents + eh->plt.offset + 12);
3141 bfd_put_32 (output_bfd,
3142 (plt_entry[4]
3143 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3144 splt->contents + eh->plt.offset + 16);
3145 }
3146 else
3147 {
3148 bfd_vma addr = got_entry - (splt->output_section->vma +
3149 splt->output_offset + eh->plt.offset);
3150
3151 bfd_put_32 (output_bfd,
3152 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3153 splt->contents + eh->plt.offset);
3154 bfd_put_32 (output_bfd,
3155 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3156 splt->contents + eh->plt.offset + 4);
3157 bfd_put_32 (output_bfd, plt_pic_entry[2],
3158 splt->contents + eh->plt.offset + 8);
3159 bfd_put_32 (output_bfd,
3160 (plt_pic_entry[3] | (plt_index << 3)),
3161 splt->contents + eh->plt.offset + 12);
3162 bfd_put_32 (output_bfd,
3163 (plt_pic_entry[4]
3164 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3165 splt->contents + eh->plt.offset + 16);
3166 }
3167
3168 /* Fill in the entry in the global offset table. */
3169 bfd_put_32 (output_bfd,
3170 (splt->output_section->vma
3171 + splt->output_offset
3172 + eh->plt.offset
3173 + 12), /* offset within PLT entry */
3174 sgot->contents + got_offset);
3175
3176 /* Fill in the entry in the .rela.plt section. */
3177 rel.r_offset = (sgot->output_section->vma
3178 + sgot->output_offset
3179 + got_offset);
3180 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3181 rel.r_addend = 0;
3182 loc = htab->srelplt->contents;
3183 loc += plt_index * sizeof(Elf32_External_Rela);
3184 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3185
3186 if (!eh->def_regular)
3187 {
3188 /* Mark the symbol as undefined, rather than as defined in
3189 the .plt section. Leave the value alone. */
3190 sym->st_shndx = SHN_UNDEF;
3191 }
3192 }
3193
3194 if (eh->got.offset != (bfd_vma) -1
3195 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3196 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3197 {
3198 /* This symbol has an entry in the global offset table. Set it
3199 up. */
3200
3201 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3202 + htab->sgot->output_offset
3203 + htab->sgot->output_section->vma);
3204
3205 /* If this is a -Bsymbolic link and the symbol is defined
3206 locally or was forced to be local because of a version file,
3207 we just want to emit a RELATIVE reloc. The entry in the
3208 global offset table will already have been initialized in the
3209 relocate_section function. */
3210 if (info->shared
3211 && (info->symbolic || eh->dynindx == -1)
3212 && eh->def_regular)
3213 {
3214 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3215 rel.r_addend = (eh->root.u.def.value
3216 + eh->root.u.def.section->output_offset
3217 + eh->root.u.def.section->output_section->vma);
3218 }
3219 else
3220 {
3221 if ((eh->got.offset & 1) != 0)
3222 abort ();
3223 bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset);
3224 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3225 rel.r_addend = 0;
3226 }
3227
3228 loc = htab->srelgot->contents;
3229 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3230 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3231 }
3232
3233 if (eh->needs_copy)
3234 {
3235 asection *s;
3236
3237 /* This symbol needs a copy reloc. Set it up. */
3238
3239 if (! (eh->dynindx != -1
3240 && (eh->root.type == bfd_link_hash_defined
3241 || eh->root.type == bfd_link_hash_defweak)))
3242 abort ();
3243
3244 s = htab->srelbss;
3245
3246 rel.r_offset = (eh->root.u.def.value
3247 + eh->root.u.def.section->output_offset
3248 + eh->root.u.def.section->output_section->vma);
3249 rel.r_addend = 0;
3250 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3251 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3252 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3253 }
3254
3255 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3256 if (eh->root.root.string[0] == '_'
3257 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3258 || eh == htab->etab.hgot))
3259 {
3260 sym->st_shndx = SHN_ABS;
3261 }
3262
3263 return TRUE;
3264 }
3265
3266 /* Set the Meta ELF ABI version. */
3267
3268 static void
3269 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
3270 {
3271 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3272
3273 i_ehdrp = elf_elfheader (abfd);
3274 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3275 }
3276
3277 /* Used to decide how to sort relocs in an optimal manner for the
3278 dynamic linker, before writing them out. */
3279
3280 static enum elf_reloc_type_class
3281 elf_metag_reloc_type_class (const Elf_Internal_Rela *rela)
3282 {
3283 switch ((int) ELF32_R_TYPE (rela->r_info))
3284 {
3285 case R_METAG_RELATIVE:
3286 return reloc_class_relative;
3287 case R_METAG_JMP_SLOT:
3288 return reloc_class_plt;
3289 case R_METAG_COPY:
3290 return reloc_class_copy;
3291 default:
3292 return reloc_class_normal;
3293 }
3294 }
3295
3296 /* Finish up the dynamic sections. */
3297
3298 static bfd_boolean
3299 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3300 struct bfd_link_info *info)
3301 {
3302 bfd *dynobj;
3303 struct elf_metag_link_hash_table *htab;
3304 asection *sdyn;
3305
3306 htab = metag_link_hash_table (info);
3307 dynobj = htab->etab.dynobj;
3308
3309 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3310
3311 if (htab->etab.dynamic_sections_created)
3312 {
3313 asection *splt;
3314 Elf32_External_Dyn *dyncon, *dynconend;
3315
3316 if (sdyn == NULL)
3317 abort ();
3318
3319 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3320 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3321 for (; dyncon < dynconend; dyncon++)
3322 {
3323 Elf_Internal_Dyn dyn;
3324 asection *s;
3325
3326 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3327
3328 switch (dyn.d_tag)
3329 {
3330 default:
3331 continue;
3332
3333 case DT_PLTGOT:
3334 s = htab->sgot->output_section;
3335 BFD_ASSERT (s != NULL);
3336 dyn.d_un.d_ptr = s->vma + htab->sgot->output_offset;
3337 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3338 break;
3339
3340 case DT_JMPREL:
3341 s = htab->srelplt->output_section;
3342 BFD_ASSERT (s != NULL);
3343 dyn.d_un.d_ptr = s->vma;
3344 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3345 break;
3346
3347 case DT_PLTRELSZ:
3348 s = htab->srelplt;
3349 dyn.d_un.d_val = s->size;
3350 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3351 break;
3352
3353 case DT_RELASZ:
3354 /* Don't count procedure linkage table relocs in the
3355 overall reloc count. */
3356 if (htab->srelplt) {
3357 s = htab->srelplt;
3358 dyn.d_un.d_val -= s->size;
3359 }
3360 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3361 break;
3362
3363 case DT_RELA:
3364 /* We may not be using the standard ELF linker script.
3365 If .rela.plt is the first .rela section, we adjust
3366 DT_RELA to not include it. */
3367 if (htab->srelplt) {
3368 s = htab->srelplt;
3369 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3370 dyn.d_un.d_ptr += s->size;
3371 }
3372 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3373 break;
3374 }
3375
3376 }
3377
3378 /* Fill in the first entry in the procedure linkage table. */
3379 splt = htab->splt;
3380 if (splt && splt->size > 0)
3381 {
3382 unsigned long addr;
3383 /* addr = .got + 4 */
3384 addr = htab->sgot->output_section->vma +
3385 htab->sgot->output_offset + 4;
3386 if (info->shared)
3387 {
3388 addr -= splt->output_section->vma + splt->output_offset;
3389 bfd_put_32 (output_bfd,
3390 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3391 splt->contents);
3392 bfd_put_32 (output_bfd,
3393 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3394 splt->contents + 4);
3395 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3396 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3397 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3398 }
3399 else
3400 {
3401 bfd_put_32 (output_bfd,
3402 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3403 splt->contents);
3404 bfd_put_32 (output_bfd,
3405 plt0_entry[1] | ((addr & 0xffff) << 3),
3406 splt->contents + 4);
3407 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3408 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3409 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3410 }
3411
3412 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3413 PLT_ENTRY_SIZE;
3414 }
3415 }
3416
3417 if (htab->sgot != NULL && htab->sgot->size != 0)
3418 {
3419 /* Fill in the first entry in the global offset table.
3420 We use it to point to our dynamic section, if we have one. */
3421 bfd_put_32 (output_bfd,
3422 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3423 htab->sgot->contents);
3424
3425 /* The second entry is reserved for use by the dynamic linker. */
3426 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3427
3428 /* Set .got entry size. */
3429 elf_section_data (htab->sgot->output_section)
3430 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3431 }
3432
3433 return TRUE;
3434 }
3435
3436 /* Return the section that should be marked against GC for a given
3437 relocation. */
3438
3439 static asection *
3440 elf_metag_gc_mark_hook (asection *sec,
3441 struct bfd_link_info *info,
3442 Elf_Internal_Rela *rela,
3443 struct elf_link_hash_entry *hh,
3444 Elf_Internal_Sym *sym)
3445 {
3446 if (hh != NULL)
3447 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3448 {
3449 case R_METAG_GNU_VTINHERIT:
3450 case R_METAG_GNU_VTENTRY:
3451 return NULL;
3452 }
3453
3454 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3455 }
3456
3457 /* Update the got and plt entry reference counts for the section being
3458 removed. */
3459
3460 static bfd_boolean
3461 elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3462 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3463 asection *sec ATTRIBUTE_UNUSED,
3464 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3465 {
3466 Elf_Internal_Shdr *symtab_hdr;
3467 struct elf_link_hash_entry **eh_syms;
3468 bfd_signed_vma *local_got_refcounts;
3469 bfd_signed_vma *local_plt_refcounts;
3470 const Elf_Internal_Rela *rel, *relend;
3471
3472 if (info->relocatable)
3473 return TRUE;
3474
3475 elf_section_data (sec)->local_dynrel = NULL;
3476
3477 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3478 eh_syms = elf_sym_hashes (abfd);
3479 local_got_refcounts = elf_local_got_refcounts (abfd);
3480 local_plt_refcounts = local_got_refcounts;
3481 if (local_plt_refcounts != NULL)
3482 local_plt_refcounts += symtab_hdr->sh_info;
3483
3484 relend = relocs + sec->reloc_count;
3485 for (rel = relocs; rel < relend; rel++)
3486 {
3487 unsigned long r_symndx;
3488 unsigned int r_type;
3489 struct elf_link_hash_entry *eh = NULL;
3490
3491 r_symndx = ELF32_R_SYM (rel->r_info);
3492 if (r_symndx >= symtab_hdr->sh_info)
3493 {
3494 struct elf_metag_link_hash_entry *hh;
3495 struct elf_metag_dyn_reloc_entry **hdh_pp;
3496 struct elf_metag_dyn_reloc_entry *hdh_p;
3497
3498 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3499 while (eh->root.type == bfd_link_hash_indirect
3500 || eh->root.type == bfd_link_hash_warning)
3501 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3502 hh = (struct elf_metag_link_hash_entry *) eh;
3503
3504 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3505 hdh_pp = &hdh_p->hdh_next)
3506 if (hdh_p->sec == sec)
3507 {
3508 /* Everything must go for SEC. */
3509 *hdh_pp = hdh_p->hdh_next;
3510 break;
3511 }
3512 }
3513
3514 r_type = ELF32_R_TYPE (rel->r_info);
3515 switch (r_type)
3516 {
3517 case R_METAG_TLS_LDM:
3518 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3519 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3520 break;
3521 case R_METAG_TLS_IE:
3522 case R_METAG_TLS_GD:
3523 case R_METAG_GETSET_GOT:
3524 if (eh != NULL)
3525 {
3526 if (eh->got.refcount > 0)
3527 eh->got.refcount -= 1;
3528 }
3529 else if (local_got_refcounts != NULL)
3530 {
3531 if (local_got_refcounts[r_symndx] > 0)
3532 local_got_refcounts[r_symndx] -= 1;
3533 }
3534 break;
3535
3536 case R_METAG_RELBRANCH_PLT:
3537 if (eh != NULL)
3538 {
3539 if (eh->plt.refcount > 0)
3540 eh->plt.refcount -= 1;
3541 }
3542 break;
3543
3544 case R_METAG_ADDR32:
3545 case R_METAG_HIADDR16:
3546 case R_METAG_LOADDR16:
3547 case R_METAG_GETSETOFF:
3548 case R_METAG_RELBRANCH:
3549 if (eh != NULL)
3550 {
3551 struct elf_metag_link_hash_entry *hh;
3552 struct elf_metag_dyn_reloc_entry **hdh_pp;
3553 struct elf_metag_dyn_reloc_entry *hdh_p;
3554
3555 if (!info->shared && eh->plt.refcount > 0)
3556 eh->plt.refcount -= 1;
3557
3558 hh = (struct elf_metag_link_hash_entry *) eh;
3559
3560 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3561 hdh_pp = &hdh_p->hdh_next)
3562 if (hdh_p->sec == sec)
3563 {
3564 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3565 hdh_p->relative_count -= 1;
3566 hdh_p->count -= 1;
3567 if (hdh_p->count == 0)
3568 *hdh_pp = hdh_p->hdh_next;
3569 break;
3570 }
3571 }
3572 break;
3573
3574 default:
3575 break;
3576 }
3577 }
3578
3579 return TRUE;
3580 }
3581
3582 /* Determine the type of stub needed, if any, for a call. */
3583
3584 static enum elf_metag_stub_type
3585 metag_type_of_stub (asection *input_sec,
3586 const Elf_Internal_Rela *rel,
3587 struct elf_metag_link_hash_entry *hh,
3588 bfd_vma destination,
3589 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3590 {
3591 bfd_vma location;
3592 bfd_vma branch_offset;
3593 bfd_vma max_branch_offset;
3594
3595 if (hh != NULL &&
3596 !(hh->eh.root.type == bfd_link_hash_defined
3597 || hh->eh.root.type == bfd_link_hash_defweak))
3598 return metag_stub_none;
3599
3600 /* Determine where the call point is. */
3601 location = (input_sec->output_offset
3602 + input_sec->output_section->vma
3603 + rel->r_offset);
3604
3605 branch_offset = destination - location;
3606
3607 /* Determine if a long branch stub is needed. Meta branch offsets
3608 are signed 19 bits 4 byte aligned. */
3609 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3610
3611 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3612 {
3613 if (info->shared)
3614 return metag_stub_long_branch_shared;
3615 else
3616 return metag_stub_long_branch;
3617 }
3618
3619 return metag_stub_none;
3620 }
3621
3622 #define MOVT_A0_3 0x82180005
3623 #define JUMP_A0_3 0xac180003
3624
3625 #define MOVT_A1LBP 0x83080005
3626 #define ADD_A1LBP 0x83080000
3627
3628 #define ADDT_A0_3_CPC 0x82980001
3629 #define ADD_A0_3_A0_3 0x82180000
3630 #define MOV_PC_A0_3 0xa3180ca0
3631
3632 static bfd_boolean
3633 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3634 {
3635 struct elf_metag_stub_hash_entry *hsh;
3636 asection *stub_sec;
3637 bfd *stub_bfd;
3638 bfd_byte *loc;
3639 bfd_vma sym_value;
3640 int size;
3641
3642 /* Massage our args to the form they really have. */
3643 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3644
3645 stub_sec = hsh->stub_sec;
3646
3647 /* Make a note of the offset within the stubs for this entry. */
3648 hsh->stub_offset = stub_sec->size;
3649 loc = stub_sec->contents + hsh->stub_offset;
3650
3651 stub_bfd = stub_sec->owner;
3652
3653 switch (hsh->stub_type)
3654 {
3655 case metag_stub_long_branch_shared:
3656 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3657 calculate the jump target using A0.3 as a temporary. Then a MOV
3658 to PC carries out the jump. */
3659 sym_value = (hsh->target_value
3660 + hsh->target_section->output_offset
3661 + hsh->target_section->output_section->vma
3662 + hsh->addend);
3663
3664 sym_value -= (hsh->stub_offset
3665 + stub_sec->output_offset
3666 + stub_sec->output_section->vma);
3667
3668 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3669 loc);
3670
3671 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3672 loc + 4);
3673
3674 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3675
3676 size = 12;
3677 break;
3678 case metag_stub_long_branch:
3679 /* A standard long branch stub is a MOVT instruction followed by a
3680 JUMP instruction using the A0.3 register as a temporary. This is
3681 the same method used by the LDLK linker (patch.c). */
3682 sym_value = (hsh->target_value
3683 + hsh->target_section->output_offset
3684 + hsh->target_section->output_section->vma
3685 + hsh->addend);
3686
3687 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3688 loc);
3689
3690 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3691
3692 size = 8;
3693 break;
3694 default:
3695 BFD_FAIL ();
3696 return FALSE;
3697 }
3698
3699 stub_sec->size += size;
3700 return TRUE;
3701 }
3702
3703 /* As above, but don't actually build the stub. Just bump offset so
3704 we know stub section sizes. */
3705
3706 static bfd_boolean
3707 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3708 {
3709 struct elf_metag_stub_hash_entry *hsh;
3710 int size = 0;
3711
3712 /* Massage our args to the form they really have. */
3713 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3714
3715 if (hsh->stub_type == metag_stub_long_branch)
3716 size = 8;
3717 else if (hsh->stub_type == metag_stub_long_branch_shared)
3718 size = 12;
3719
3720 hsh->stub_sec->size += size;
3721 return TRUE;
3722 }
3723
3724 /* Set up various things so that we can make a list of input sections
3725 for each output section included in the link. Returns -1 on error,
3726 0 when no stubs will be needed, and 1 on success. */
3727
3728 int
3729 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3730 {
3731 bfd *input_bfd;
3732 unsigned int bfd_count;
3733 int top_id, top_index;
3734 asection *section;
3735 asection **input_list, **list;
3736 bfd_size_type amt;
3737 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3738
3739 /* Count the number of input BFDs and find the top input section id. */
3740 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3741 input_bfd != NULL;
3742 input_bfd = input_bfd->link_next)
3743 {
3744 bfd_count += 1;
3745 for (section = input_bfd->sections;
3746 section != NULL;
3747 section = section->next)
3748 {
3749 if (top_id < section->id)
3750 top_id = section->id;
3751 }
3752 }
3753
3754 htab->bfd_count = bfd_count;
3755
3756 amt = sizeof (struct map_stub) * (top_id + 1);
3757 htab->stub_group = bfd_zmalloc (amt);
3758 if (htab->stub_group == NULL)
3759 return -1;
3760
3761 /* We can't use output_bfd->section_count here to find the top output
3762 section index as some sections may have been removed, and
3763 strip_excluded_output_sections doesn't renumber the indices. */
3764 for (section = output_bfd->sections, top_index = 0;
3765 section != NULL;
3766 section = section->next)
3767 {
3768 if (top_index < section->index)
3769 top_index = section->index;
3770 }
3771
3772 htab->top_index = top_index;
3773 amt = sizeof (asection *) * (top_index + 1);
3774 input_list = bfd_malloc (amt);
3775 htab->input_list = input_list;
3776 if (input_list == NULL)
3777 return -1;
3778
3779 /* For sections we aren't interested in, mark their entries with a
3780 value we can check later. */
3781 list = input_list + top_index;
3782 do
3783 *list = bfd_abs_section_ptr;
3784 while (list-- != input_list);
3785
3786 for (section = output_bfd->sections;
3787 section != NULL;
3788 section = section->next)
3789 {
3790 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3791 * have PC relative relocs in them but no code flag set. */
3792 if (((section->flags & SEC_CODE) != 0) ||
3793 strcmp(".ctors", section->name) ||
3794 strcmp(".dtors", section->name))
3795 input_list[section->index] = NULL;
3796 }
3797
3798 return 1;
3799 }
3800
3801 /* The linker repeatedly calls this function for each input section,
3802 in the order that input sections are linked into output sections.
3803 Build lists of input sections to determine groupings between which
3804 we may insert linker stubs. */
3805
3806 void
3807 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3808 {
3809 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3810
3811 if (isec->output_section->index <= htab->top_index)
3812 {
3813 asection **list = htab->input_list + isec->output_section->index;
3814 if (*list != bfd_abs_section_ptr)
3815 {
3816 /* Steal the link_sec pointer for our list. */
3817 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3818 /* This happens to make the list in reverse order,
3819 which is what we want. */
3820 PREV_SEC (isec) = *list;
3821 *list = isec;
3822 }
3823 }
3824 }
3825
3826 /* See whether we can group stub sections together. Grouping stub
3827 sections may result in fewer stubs. More importantly, we need to
3828 put all .init* and .fini* stubs at the beginning of the .init or
3829 .fini output sections respectively, because glibc splits the
3830 _init and _fini functions into multiple parts. Putting a stub in
3831 the middle of a function is not a good idea. */
3832
3833 static void
3834 group_sections (struct elf_metag_link_hash_table *htab,
3835 bfd_size_type stub_group_size,
3836 bfd_boolean stubs_always_before_branch)
3837 {
3838 asection **list = htab->input_list + htab->top_index;
3839 do
3840 {
3841 asection *tail = *list;
3842 if (tail == bfd_abs_section_ptr)
3843 continue;
3844 while (tail != NULL)
3845 {
3846 asection *curr;
3847 asection *prev;
3848 bfd_size_type total;
3849 bfd_boolean big_sec;
3850
3851 curr = tail;
3852 total = tail->size;
3853 big_sec = total >= stub_group_size;
3854
3855 while ((prev = PREV_SEC (curr)) != NULL
3856 && ((total += curr->output_offset - prev->output_offset)
3857 < stub_group_size))
3858 curr = prev;
3859
3860 /* OK, the size from the start of CURR to the end is less
3861 than stub_group_size bytes and thus can be handled by one stub
3862 section. (or the tail section is itself larger than
3863 stub_group_size bytes, in which case we may be toast.)
3864 We should really be keeping track of the total size of
3865 stubs added here, as stubs contribute to the final output
3866 section size. */
3867 do
3868 {
3869 prev = PREV_SEC (tail);
3870 /* Set up this stub group. */
3871 htab->stub_group[tail->id].link_sec = curr;
3872 }
3873 while (tail != curr && (tail = prev) != NULL);
3874
3875 /* But wait, there's more! Input sections up to stub_group_size
3876 bytes before the stub section can be handled by it too.
3877 Don't do this if we have a really large section after the
3878 stubs, as adding more stubs increases the chance that
3879 branches may not reach into the stub section. */
3880 if (!stubs_always_before_branch && !big_sec)
3881 {
3882 total = 0;
3883 while (prev != NULL
3884 && ((total += tail->output_offset - prev->output_offset)
3885 < stub_group_size))
3886 {
3887 tail = prev;
3888 prev = PREV_SEC (tail);
3889 htab->stub_group[tail->id].link_sec = curr;
3890 }
3891 }
3892 tail = prev;
3893 }
3894 }
3895 while (list-- != htab->input_list);
3896 free (htab->input_list);
3897 #undef PREV_SEC
3898 }
3899
3900 /* Read in all local syms for all input bfds.
3901 Returns -1 on error, 0 otherwise. */
3902
3903 static int
3904 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3905 struct bfd_link_info *info)
3906 {
3907 unsigned int bfd_indx;
3908 Elf_Internal_Sym *local_syms, **all_local_syms;
3909 int stub_changed = 0;
3910 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3911
3912 /* We want to read in symbol extension records only once. To do this
3913 we need to read in the local symbols in parallel and save them for
3914 later use; so hold pointers to the local symbols in an array. */
3915 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3916 all_local_syms = bfd_zmalloc (amt);
3917 htab->all_local_syms = all_local_syms;
3918 if (all_local_syms == NULL)
3919 return -1;
3920
3921 /* Walk over all the input BFDs, swapping in local symbols. */
3922 for (bfd_indx = 0;
3923 input_bfd != NULL;
3924 input_bfd = input_bfd->link_next, bfd_indx++)
3925 {
3926 Elf_Internal_Shdr *symtab_hdr;
3927
3928 /* We'll need the symbol table in a second. */
3929 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3930 if (symtab_hdr->sh_info == 0)
3931 continue;
3932
3933 /* We need an array of the local symbols attached to the input bfd. */
3934 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3935 if (local_syms == NULL)
3936 {
3937 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3938 symtab_hdr->sh_info, 0,
3939 NULL, NULL, NULL);
3940 /* Cache them for elf_link_input_bfd. */
3941 symtab_hdr->contents = (unsigned char *) local_syms;
3942 }
3943 if (local_syms == NULL)
3944 return -1;
3945
3946 all_local_syms[bfd_indx] = local_syms;
3947 }
3948
3949 return stub_changed;
3950 }
3951
3952 /* Determine and set the size of the stub section for a final link.
3953
3954 The basic idea here is to examine all the relocations looking for
3955 PC-relative calls to a target that is unreachable with a "CALLR"
3956 instruction. */
3957
3958 /* See elf32-hppa.c and elf64-ppc.c. */
3959
3960 bfd_boolean
3961 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3962 struct bfd_link_info *info,
3963 bfd_signed_vma group_size,
3964 asection * (*add_stub_section) (const char *, asection *),
3965 void (*layout_sections_again) (void))
3966 {
3967 bfd_size_type stub_group_size;
3968 bfd_boolean stubs_always_before_branch;
3969 bfd_boolean stub_changed;
3970 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3971
3972 /* Stash our params away. */
3973 htab->stub_bfd = stub_bfd;
3974 htab->add_stub_section = add_stub_section;
3975 htab->layout_sections_again = layout_sections_again;
3976 stubs_always_before_branch = group_size < 0;
3977 if (group_size < 0)
3978 stub_group_size = -group_size;
3979 else
3980 stub_group_size = group_size;
3981 if (stub_group_size == 1)
3982 {
3983 /* Default values. */
3984 /* FIXME: not sure what these values should be */
3985 if (stubs_always_before_branch)
3986 {
3987 stub_group_size = (1 << BRANCH_BITS);
3988 }
3989 else
3990 {
3991 stub_group_size = (1 << BRANCH_BITS);
3992 }
3993 }
3994
3995 group_sections (htab, stub_group_size, stubs_always_before_branch);
3996
3997 switch (get_local_syms (output_bfd, info->input_bfds, info))
3998 {
3999 default:
4000 if (htab->all_local_syms)
4001 goto error_ret_free_local;
4002 return FALSE;
4003
4004 case 0:
4005 stub_changed = FALSE;
4006 break;
4007
4008 case 1:
4009 stub_changed = TRUE;
4010 break;
4011 }
4012
4013 while (1)
4014 {
4015 bfd *input_bfd;
4016 unsigned int bfd_indx;
4017 asection *stub_sec;
4018
4019 for (input_bfd = info->input_bfds, bfd_indx = 0;
4020 input_bfd != NULL;
4021 input_bfd = input_bfd->link_next, bfd_indx++)
4022 {
4023 Elf_Internal_Shdr *symtab_hdr;
4024 asection *section;
4025 Elf_Internal_Sym *local_syms;
4026
4027 /* We'll need the symbol table in a second. */
4028 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4029 if (symtab_hdr->sh_info == 0)
4030 continue;
4031
4032 local_syms = htab->all_local_syms[bfd_indx];
4033
4034 /* Walk over each section attached to the input bfd. */
4035 for (section = input_bfd->sections;
4036 section != NULL;
4037 section = section->next)
4038 {
4039 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4040
4041 /* If there aren't any relocs, then there's nothing more
4042 to do. */
4043 if ((section->flags & SEC_RELOC) == 0
4044 || section->reloc_count == 0)
4045 continue;
4046
4047 /* If this section is a link-once section that will be
4048 discarded, then don't create any stubs. */
4049 if (section->output_section == NULL
4050 || section->output_section->owner != output_bfd)
4051 continue;
4052
4053 /* Get the relocs. */
4054 internal_relocs
4055 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4056 info->keep_memory);
4057 if (internal_relocs == NULL)
4058 goto error_ret_free_local;
4059
4060 /* Now examine each relocation. */
4061 irela = internal_relocs;
4062 irelaend = irela + section->reloc_count;
4063 for (; irela < irelaend; irela++)
4064 {
4065 unsigned int r_type, r_indx;
4066 enum elf_metag_stub_type stub_type;
4067 struct elf_metag_stub_hash_entry *hsh;
4068 asection *sym_sec;
4069 bfd_vma sym_value;
4070 bfd_vma destination;
4071 struct elf_metag_link_hash_entry *hh;
4072 char *stub_name;
4073 const asection *id_sec;
4074
4075 r_type = ELF32_R_TYPE (irela->r_info);
4076 r_indx = ELF32_R_SYM (irela->r_info);
4077
4078 if (r_type >= (unsigned int) R_METAG_MAX)
4079 {
4080 bfd_set_error (bfd_error_bad_value);
4081 error_ret_free_internal:
4082 if (elf_section_data (section)->relocs == NULL)
4083 free (internal_relocs);
4084 goto error_ret_free_local;
4085 }
4086
4087 /* Only look for stubs on CALLR and B instructions. */
4088 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4089 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4090 continue;
4091
4092 /* Now determine the call target, its name, value,
4093 section. */
4094 sym_sec = NULL;
4095 sym_value = 0;
4096 destination = 0;
4097 hh = NULL;
4098 if (r_indx < symtab_hdr->sh_info)
4099 {
4100 /* It's a local symbol. */
4101 Elf_Internal_Sym *sym;
4102 Elf_Internal_Shdr *hdr;
4103 unsigned int shndx;
4104
4105 sym = local_syms + r_indx;
4106 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4107 sym_value = sym->st_value;
4108 shndx = sym->st_shndx;
4109 if (shndx < elf_numsections (input_bfd))
4110 {
4111 hdr = elf_elfsections (input_bfd)[shndx];
4112 sym_sec = hdr->bfd_section;
4113 destination = (sym_value + irela->r_addend
4114 + sym_sec->output_offset
4115 + sym_sec->output_section->vma);
4116 }
4117 }
4118 else
4119 {
4120 /* It's an external symbol. */
4121 int e_indx;
4122
4123 e_indx = r_indx - symtab_hdr->sh_info;
4124 hh = ((struct elf_metag_link_hash_entry *)
4125 elf_sym_hashes (input_bfd)[e_indx]);
4126
4127 while (hh->eh.root.type == bfd_link_hash_indirect
4128 || hh->eh.root.type == bfd_link_hash_warning)
4129 hh = ((struct elf_metag_link_hash_entry *)
4130 hh->eh.root.u.i.link);
4131
4132 if (hh->eh.root.type == bfd_link_hash_defined
4133 || hh->eh.root.type == bfd_link_hash_defweak)
4134 {
4135 sym_sec = hh->eh.root.u.def.section;
4136 sym_value = hh->eh.root.u.def.value;
4137 if (hh->eh.plt.offset != (bfd_vma) -1
4138 && hh->eh.dynindx != -1
4139 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4140 {
4141 sym_sec = htab->splt;
4142 sym_value = hh->eh.plt.offset;
4143 }
4144
4145 if (sym_sec->output_section != NULL)
4146 destination = (sym_value + irela->r_addend
4147 + sym_sec->output_offset
4148 + sym_sec->output_section->vma);
4149 else
4150 continue;
4151 }
4152 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4153 {
4154 if (! info->shared)
4155 continue;
4156 }
4157 else if (hh->eh.root.type == bfd_link_hash_undefined)
4158 {
4159 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4160 && (ELF_ST_VISIBILITY (hh->eh.other)
4161 == STV_DEFAULT)))
4162 continue;
4163 }
4164 else
4165 {
4166 bfd_set_error (bfd_error_bad_value);
4167 goto error_ret_free_internal;
4168 }
4169 }
4170
4171 /* Determine what (if any) linker stub is needed. */
4172 stub_type = metag_type_of_stub (section, irela, hh,
4173 destination, info);
4174 if (stub_type == metag_stub_none)
4175 continue;
4176
4177 /* Support for grouping stub sections. */
4178 id_sec = htab->stub_group[section->id].link_sec;
4179
4180 /* Get the name of this stub. */
4181 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4182 if (!stub_name)
4183 goto error_ret_free_internal;
4184
4185 hsh = metag_stub_hash_lookup (&htab->bstab,
4186 stub_name,
4187 FALSE, FALSE);
4188 if (hsh != NULL)
4189 {
4190 /* The proper stub has already been created. */
4191 free (stub_name);
4192 continue;
4193 }
4194
4195 hsh = metag_add_stub (stub_name, section, htab);
4196 if (hsh == NULL)
4197 {
4198 free (stub_name);
4199 goto error_ret_free_internal;
4200 }
4201 hsh->target_value = sym_value;
4202 hsh->target_section = sym_sec;
4203 hsh->stub_type = stub_type;
4204 hsh->hh = hh;
4205 hsh->addend = irela->r_addend;
4206 stub_changed = TRUE;
4207 }
4208
4209 /* We're done with the internal relocs, free them. */
4210 if (elf_section_data (section)->relocs == NULL)
4211 free (internal_relocs);
4212 }
4213 }
4214
4215 if (!stub_changed)
4216 break;
4217
4218 /* OK, we've added some stubs. Find out the new size of the
4219 stub sections. */
4220 for (stub_sec = htab->stub_bfd->sections;
4221 stub_sec != NULL;
4222 stub_sec = stub_sec->next)
4223 stub_sec->size = 0;
4224
4225 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4226
4227 /* Ask the linker to do its stuff. */
4228 (*htab->layout_sections_again) ();
4229 stub_changed = FALSE;
4230 }
4231
4232 free (htab->all_local_syms);
4233 return TRUE;
4234
4235 error_ret_free_local:
4236 free (htab->all_local_syms);
4237 return FALSE;
4238 }
4239
4240 /* Build all the stubs associated with the current output file. The
4241 stubs are kept in a hash table attached to the main linker hash
4242 table. This function is called via metagelf_finish in the linker. */
4243
4244 bfd_boolean
4245 elf_metag_build_stubs (struct bfd_link_info *info)
4246 {
4247 asection *stub_sec;
4248 struct bfd_hash_table *table;
4249 struct elf_metag_link_hash_table *htab;
4250
4251 htab = metag_link_hash_table (info);
4252
4253 for (stub_sec = htab->stub_bfd->sections;
4254 stub_sec != NULL;
4255 stub_sec = stub_sec->next)
4256 {
4257 bfd_size_type size;
4258
4259 /* Allocate memory to hold the linker stubs. */
4260 size = stub_sec->size;
4261 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4262 if (stub_sec->contents == NULL && size != 0)
4263 return FALSE;
4264 stub_sec->size = 0;
4265 }
4266
4267 /* Build the stubs as directed by the stub hash table. */
4268 table = &htab->bstab;
4269 bfd_hash_traverse (table, metag_build_one_stub, info);
4270
4271 return TRUE;
4272 }
4273
4274 /* Return TRUE if SYM represents a local label symbol. */
4275
4276 static bfd_boolean
4277 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4278 {
4279 if (name[0] == '$' && name[1] == 'L')
4280 return 1;
4281 return _bfd_elf_is_local_label_name (abfd, name);
4282 }
4283
4284 /* Return address for Ith PLT stub in section PLT, for relocation REL
4285 or (bfd_vma) -1 if it should not be included. */
4286
4287 static bfd_vma
4288 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4289 const arelent *rel ATTRIBUTE_UNUSED)
4290 {
4291 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4292 }
4293
4294 #define ELF_ARCH bfd_arch_metag
4295 #define ELF_TARGET_ID METAG_ELF_DATA
4296 #define ELF_MACHINE_CODE EM_METAG
4297 #define ELF_MINPAGESIZE 0x1000
4298 #define ELF_MAXPAGESIZE 0x4000
4299 #define ELF_COMMONPAGESIZE 0x1000
4300
4301 #define TARGET_LITTLE_SYM bfd_elf32_metag_vec
4302 #define TARGET_LITTLE_NAME "elf32-metag"
4303
4304 #define elf_symbol_leading_char '_'
4305
4306 #define elf_info_to_howto_rel NULL
4307 #define elf_info_to_howto metag_info_to_howto_rela
4308
4309 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4310 #define bfd_elf32_bfd_link_hash_table_create \
4311 elf_metag_link_hash_table_create
4312 #define bfd_elf32_bfd_link_hash_table_free elf_metag_link_hash_table_free
4313 #define elf_backend_relocate_section elf_metag_relocate_section
4314 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4315 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4316 #define elf_backend_check_relocs elf_metag_check_relocs
4317 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4318 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4319 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4320 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4321 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4322 #define elf_backend_omit_section_dynsym \
4323 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4324 #define elf_backend_post_process_headers elf_metag_post_process_headers
4325 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4326 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4327 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4328
4329 #define elf_backend_can_gc_sections 1
4330 #define elf_backend_can_refcount 1
4331 #define elf_backend_got_header_size 12
4332 #define elf_backend_rela_normal 1
4333 #define elf_backend_want_got_sym 0
4334 #define elf_backend_want_plt_sym 0
4335 #define elf_backend_plt_readonly 1
4336
4337 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4338 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4339
4340 #include "elf32-target.h"
GDB Binutils - Deliverables
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