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Make asection->id and asection->index unsigned
[deliverable/binutils-gdb.git] / bfd / elf32-metag.c
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2015 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
28
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32 /* ABI version:
33 0 - original
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
36
37 static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46 static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55 static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64 static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95 static reloc_howto_type elf_metag_howto_table[] =
96 {
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 };
682
683 #define BRANCH_BITS 19
684
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
695
696 struct metag_reloc_map
697 {
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700 };
701
702 static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746 enum elf_metag_stub_type
747 {
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751 };
752
753 struct elf_metag_stub_hash_entry
754 {
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780 };
781
782 struct elf_metag_link_hash_entry
783 {
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811 };
812
813 struct elf_metag_link_hash_table
814 {
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 unsigned int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sgot;
847 asection *sgotplt;
848 asection *srelgot;
849 asection *splt;
850 asection *srelplt;
851 asection *sdynbss;
852 asection *srelbss;
853
854 /* Small local sym cache. */
855 struct sym_cache sym_cache;
856
857 /* Data for LDM relocations. */
858 union
859 {
860 bfd_signed_vma refcount;
861 bfd_vma offset;
862 } tls_ldm_got;
863 };
864
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
867 segment p_vaddr. */
868 static bfd_vma
869 dtpoff_base (struct bfd_link_info *info)
870 {
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info)->tls_sec == NULL)
873 return 0;
874 return elf_hash_table (info)->tls_sec->vma;
875 }
876
877 /* Return the relocation value for R_METAG_TLS_IE */
878 static bfd_vma
879 tpoff (struct bfd_link_info *info, bfd_vma address)
880 {
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info)->tls_sec == NULL)
883 return 0;
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address - elf_hash_table (info)->tls_sec->vma
887 + align_power ((bfd_vma) 8,
888 elf_hash_table (info)->tls_sec->alignment_power));
889 }
890
891 static void
892 metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
893 arelent *cache_ptr,
894 Elf_Internal_Rela *dst)
895 {
896 unsigned int r_type;
897
898 r_type = ELF32_R_TYPE (dst->r_info);
899 if (r_type >= (unsigned int) R_METAG_MAX)
900 {
901 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd, r_type);
902 r_type = 0;
903 }
904 cache_ptr->howto = & elf_metag_howto_table [r_type];
905 }
906
907 static reloc_howto_type *
908 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
909 bfd_reloc_code_real_type code)
910 {
911 unsigned int i;
912
913 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
914 if (metag_reloc_map [i].bfd_reloc_val == code)
915 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
916
917 return NULL;
918 }
919
920 static reloc_howto_type *
921 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
922 const char *r_name)
923 {
924 unsigned int i;
925
926 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
927 if (elf_metag_howto_table[i].name != NULL
928 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
929 return &elf_metag_howto_table[i];
930
931 return NULL;
932 }
933
934 /* Various hash macros and functions. */
935 #define metag_link_hash_table(p) \
936 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
937 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
938
939 #define metag_elf_hash_entry(ent) \
940 ((struct elf_metag_link_hash_entry *)(ent))
941
942 #define metag_stub_hash_entry(ent) \
943 ((struct elf_metag_stub_hash_entry *)(ent))
944
945 #define metag_stub_hash_lookup(table, string, create, copy) \
946 ((struct elf_metag_stub_hash_entry *) \
947 bfd_hash_lookup ((table), (string), (create), (copy)))
948
949 #define metag_elf_local_got_tls_type(abfd) \
950 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
951
952 /* Assorted hash table functions. */
953
954 /* Initialize an entry in the stub hash table. */
955
956 static struct bfd_hash_entry *
957 stub_hash_newfunc (struct bfd_hash_entry *entry,
958 struct bfd_hash_table *table,
959 const char *string)
960 {
961 /* Allocate the structure if it has not already been allocated by a
962 subclass. */
963 if (entry == NULL)
964 {
965 entry = bfd_hash_allocate (table,
966 sizeof (struct elf_metag_stub_hash_entry));
967 if (entry == NULL)
968 return entry;
969 }
970
971 /* Call the allocation method of the superclass. */
972 entry = bfd_hash_newfunc (entry, table, string);
973 if (entry != NULL)
974 {
975 struct elf_metag_stub_hash_entry *hsh;
976
977 /* Initialize the local fields. */
978 hsh = (struct elf_metag_stub_hash_entry *) entry;
979 hsh->stub_sec = NULL;
980 hsh->stub_offset = 0;
981 hsh->target_value = 0;
982 hsh->target_section = NULL;
983 hsh->stub_type = metag_stub_long_branch;
984 hsh->hh = NULL;
985 hsh->id_sec = NULL;
986 }
987
988 return entry;
989 }
990
991 /* Initialize an entry in the link hash table. */
992
993 static struct bfd_hash_entry *
994 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
995 struct bfd_hash_table *table,
996 const char *string)
997 {
998 /* Allocate the structure if it has not already been allocated by a
999 subclass. */
1000 if (entry == NULL)
1001 {
1002 entry = bfd_hash_allocate (table,
1003 sizeof (struct elf_metag_link_hash_entry));
1004 if (entry == NULL)
1005 return entry;
1006 }
1007
1008 /* Call the allocation method of the superclass. */
1009 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1010 if (entry != NULL)
1011 {
1012 struct elf_metag_link_hash_entry *hh;
1013
1014 /* Initialize the local fields. */
1015 hh = (struct elf_metag_link_hash_entry *) entry;
1016 hh->hsh_cache = NULL;
1017 hh->dyn_relocs = NULL;
1018 hh->tls_type = GOT_UNKNOWN;
1019 }
1020
1021 return entry;
1022 }
1023
1024 /* Free the derived linker hash table. */
1025
1026 static void
1027 elf_metag_link_hash_table_free (bfd *obfd)
1028 {
1029 struct elf_metag_link_hash_table *htab
1030 = (struct elf_metag_link_hash_table *) obfd->link.hash;
1031
1032 bfd_hash_table_free (&htab->bstab);
1033 _bfd_elf_link_hash_table_free (obfd);
1034 }
1035
1036 /* Create the derived linker hash table. The Meta ELF port uses the derived
1037 hash table to keep information specific to the Meta ELF linker (without
1038 using static variables). */
1039
1040 static struct bfd_link_hash_table *
1041 elf_metag_link_hash_table_create (bfd *abfd)
1042 {
1043 struct elf_metag_link_hash_table *htab;
1044 bfd_size_type amt = sizeof (*htab);
1045
1046 htab = bfd_zmalloc (amt);
1047 if (htab == NULL)
1048 return NULL;
1049
1050 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1051 metag_link_hash_newfunc,
1052 sizeof (struct elf_metag_link_hash_entry),
1053 METAG_ELF_DATA))
1054 {
1055 free (htab);
1056 return NULL;
1057 }
1058
1059 /* Init the stub hash table too. */
1060 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1061 sizeof (struct elf_metag_stub_hash_entry)))
1062 {
1063 _bfd_elf_link_hash_table_free (abfd);
1064 return NULL;
1065 }
1066 htab->etab.root.hash_table_free = elf_metag_link_hash_table_free;
1067
1068 return &htab->etab.root;
1069 }
1070
1071 /* Section name for stubs is the associated section name plus this
1072 string. */
1073 #define STUB_SUFFIX ".stub"
1074
1075 /* Build a name for an entry in the stub hash table. */
1076
1077 static char *
1078 metag_stub_name (const asection *input_section,
1079 const asection *sym_sec,
1080 const struct elf_metag_link_hash_entry *hh,
1081 const Elf_Internal_Rela *rel)
1082 {
1083 char *stub_name;
1084 bfd_size_type len;
1085
1086 if (hh)
1087 {
1088 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1089 stub_name = bfd_malloc (len);
1090 if (stub_name != NULL)
1091 {
1092 sprintf (stub_name, "%08x_%s+%x",
1093 input_section->id & 0xffffffff,
1094 hh->eh.root.root.string,
1095 (int) rel->r_addend & 0xffffffff);
1096 }
1097 }
1098 else
1099 {
1100 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1101 stub_name = bfd_malloc (len);
1102 if (stub_name != NULL)
1103 {
1104 sprintf (stub_name, "%08x_%x:%x+%x",
1105 input_section->id & 0xffffffff,
1106 sym_sec->id & 0xffffffff,
1107 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1108 (int) rel->r_addend & 0xffffffff);
1109 }
1110 }
1111 return stub_name;
1112 }
1113
1114 /* Look up an entry in the stub hash. Stub entries are cached because
1115 creating the stub name takes a bit of time. */
1116
1117 static struct elf_metag_stub_hash_entry *
1118 metag_get_stub_entry (const asection *input_section,
1119 const asection *sym_sec,
1120 struct elf_metag_link_hash_entry *hh,
1121 const Elf_Internal_Rela *rel,
1122 struct elf_metag_link_hash_table *htab)
1123 {
1124 struct elf_metag_stub_hash_entry *hsh;
1125 const asection *id_sec;
1126
1127 /* If this input section is part of a group of sections sharing one
1128 stub section, then use the id of the first section in the group.
1129 Stub names need to include a section id, as there may well be
1130 more than one stub used to reach say, printf, and we need to
1131 distinguish between them. */
1132 id_sec = htab->stub_group[input_section->id].link_sec;
1133
1134 if (hh != NULL && hh->hsh_cache != NULL
1135 && hh->hsh_cache->hh == hh
1136 && hh->hsh_cache->id_sec == id_sec)
1137 {
1138 hsh = hh->hsh_cache;
1139 }
1140 else
1141 {
1142 char *stub_name;
1143
1144 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1145 if (stub_name == NULL)
1146 return NULL;
1147
1148 hsh = metag_stub_hash_lookup (&htab->bstab,
1149 stub_name, FALSE, FALSE);
1150
1151 if (hh != NULL)
1152 hh->hsh_cache = hsh;
1153
1154 free (stub_name);
1155 }
1156
1157 return hsh;
1158 }
1159
1160 /* Add a new stub entry to the stub hash. Not all fields of the new
1161 stub entry are initialised. */
1162
1163 static struct elf_metag_stub_hash_entry *
1164 metag_add_stub (const char *stub_name,
1165 asection *section,
1166 struct elf_metag_link_hash_table *htab)
1167 {
1168 asection *link_sec;
1169 asection *stub_sec;
1170 struct elf_metag_stub_hash_entry *hsh;
1171
1172 link_sec = htab->stub_group[section->id].link_sec;
1173 stub_sec = htab->stub_group[section->id].stub_sec;
1174 if (stub_sec == NULL)
1175 {
1176 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1177 if (stub_sec == NULL)
1178 {
1179 size_t namelen;
1180 bfd_size_type len;
1181 char *s_name;
1182
1183 namelen = strlen (link_sec->name);
1184 len = namelen + sizeof (STUB_SUFFIX);
1185 s_name = bfd_alloc (htab->stub_bfd, len);
1186 if (s_name == NULL)
1187 return NULL;
1188
1189 memcpy (s_name, link_sec->name, namelen);
1190 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1191
1192 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1193 if (stub_sec == NULL)
1194 return NULL;
1195 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1196 }
1197 htab->stub_group[section->id].stub_sec = stub_sec;
1198 }
1199
1200 /* Enter this entry into the linker stub hash table. */
1201 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1202 TRUE, FALSE);
1203 if (hsh == NULL)
1204 {
1205 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
1206 section->owner,
1207 stub_name);
1208 return NULL;
1209 }
1210
1211 hsh->stub_sec = stub_sec;
1212 hsh->stub_offset = 0;
1213 hsh->id_sec = link_sec;
1214 return hsh;
1215 }
1216
1217 /* Check a signed integer value can be represented in the given number
1218 of bits. */
1219
1220 static bfd_boolean
1221 within_signed_range (int value, unsigned int bits)
1222 {
1223 int min_val = -(1 << (bits - 1));
1224 int max_val = (1 << (bits - 1)) - 1;
1225 return (value <= max_val) && (value >= min_val);
1226 }
1227
1228 /* Perform a relocation as part of a final link. */
1229
1230 static bfd_reloc_status_type
1231 metag_final_link_relocate (reloc_howto_type *howto,
1232 bfd *input_bfd,
1233 asection *input_section,
1234 bfd_byte *contents,
1235 Elf_Internal_Rela *rel,
1236 bfd_vma relocation,
1237 struct elf_metag_link_hash_entry *hh,
1238 struct elf_metag_link_hash_table *htab,
1239 asection *sym_sec)
1240 {
1241 bfd_reloc_status_type r = bfd_reloc_ok;
1242 bfd_byte *hit_data = contents + rel->r_offset;
1243 int opcode, op_shift, op_extended, l1, l2;
1244 bfd_signed_vma srel, addend = rel->r_addend;
1245 struct elf_metag_stub_hash_entry *hsh = NULL;
1246 bfd_vma location;
1247
1248 /* Find out where we are and where we're going. */
1249 location = (rel->r_offset +
1250 input_section->output_offset +
1251 input_section->output_section->vma);
1252
1253 switch (howto->type)
1254 {
1255 case R_METAG_RELBRANCH:
1256 case R_METAG_RELBRANCH_PLT:
1257 /* Make it a pc relative offset. */
1258 relocation -= location;
1259 break;
1260 case R_METAG_TLS_GD:
1261 case R_METAG_TLS_IE:
1262 relocation -= elf_gp (input_section->output_section->owner);
1263 break;
1264 default:
1265 break;
1266 }
1267
1268 switch (howto->type)
1269 {
1270 case R_METAG_RELBRANCH_PLT:
1271 case R_METAG_RELBRANCH:
1272 opcode = bfd_get_32 (input_bfd, hit_data);
1273
1274 srel = (bfd_signed_vma) relocation;
1275 srel += addend;
1276
1277 /* If the branch is out of reach, then redirect the
1278 call to the local stub for this function. */
1279 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1280 (srel < - (1 << (BRANCH_BITS + 1))))
1281 {
1282 if (sym_sec == NULL)
1283 break;
1284
1285 hsh = metag_get_stub_entry (input_section, sym_sec,
1286 hh, rel, htab);
1287 if (hsh == NULL)
1288 return bfd_reloc_undefined;
1289
1290 /* Munge up the value and addend so that we call the stub
1291 rather than the procedure directly. */
1292 srel = (hsh->stub_offset
1293 + hsh->stub_sec->output_offset
1294 + hsh->stub_sec->output_section->vma);
1295 srel -= location;
1296 }
1297
1298 srel = srel >> 2;
1299
1300 if (!within_signed_range (srel, BRANCH_BITS))
1301 {
1302 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1303 srel = 0;
1304 else
1305 return bfd_reloc_overflow;
1306 }
1307
1308 opcode &= ~(0x7ffff << 5);
1309 opcode |= ((srel & 0x7ffff) << 5);
1310
1311 bfd_put_32 (input_bfd, opcode, hit_data);
1312 break;
1313 case R_METAG_GETSETOFF:
1314 case R_METAG_GETSET_GOT:
1315 case R_METAG_GETSET_GOTOFF:
1316 opcode = bfd_get_32 (input_bfd, hit_data);
1317
1318 srel = (bfd_signed_vma) relocation;
1319 srel += addend;
1320
1321 /* Is this a standard or extended GET/SET? */
1322 if ((opcode & 0xf0000000) == 0xa0000000)
1323 {
1324 /* Extended GET/SET. */
1325 l1 = opcode & 0x2;
1326 l2 = opcode & 0x4;
1327 op_extended = 1;
1328 }
1329 else
1330 {
1331 /* Standard GET/SET. */
1332 l1 = opcode & 0x01000000;
1333 l2 = opcode & 0x04000000;
1334 op_extended = 0;
1335 }
1336
1337 /* Calculate the width of the GET/SET and how much we need to
1338 shift the result by. */
1339 if (l2)
1340 if (l1)
1341 op_shift = 3;
1342 else
1343 op_shift = 2;
1344 else
1345 if (l1)
1346 op_shift = 1;
1347 else
1348 op_shift = 0;
1349
1350 /* GET/SET offsets are scaled by the width of the transfer. */
1351 srel = srel >> op_shift;
1352
1353 /* Extended GET/SET has signed 12 bits of offset, standard has
1354 signed 6 bits. */
1355 if (op_extended)
1356 {
1357 if (!within_signed_range (srel, 12))
1358 {
1359 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1360 srel = 0;
1361 else
1362 return bfd_reloc_overflow;
1363 }
1364 opcode &= ~(0xfff << 7);
1365 opcode |= ((srel & 0xfff) << 7);
1366 }
1367 else
1368 {
1369 if (!within_signed_range (srel, 5))
1370 {
1371 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1372 srel = 0;
1373 else
1374 return bfd_reloc_overflow;
1375 }
1376 opcode &= ~(0x3f << 8);
1377 opcode |= ((srel & 0x3f) << 8);
1378 }
1379
1380 bfd_put_32 (input_bfd, opcode, hit_data);
1381 break;
1382 case R_METAG_TLS_GD:
1383 case R_METAG_TLS_LDM:
1384 opcode = bfd_get_32 (input_bfd, hit_data);
1385
1386 if ((bfd_signed_vma)relocation < 0)
1387 {
1388 /* sign extend immediate */
1389 if ((opcode & 0xf2000001) == 0x02000000)
1390 {
1391 /* ADD De.e,Dx.r,#I16 */
1392 /* set SE bit */
1393 opcode |= (1 << 1);
1394 } else
1395 return bfd_reloc_overflow;
1396 }
1397
1398 bfd_put_32 (input_bfd, opcode, hit_data);
1399
1400 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1401 contents, rel->r_offset,
1402 relocation, rel->r_addend);
1403 break;
1404 default:
1405 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1406 contents, rel->r_offset,
1407 relocation, rel->r_addend);
1408 }
1409
1410 return r;
1411 }
1412
1413 /* This is defined because R_METAG_NONE != 0...
1414 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1415 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1416 rel, relend, howto, contents) \
1417 { \
1418 _bfd_clear_contents (howto, input_bfd, input_section, \
1419 contents + rel->r_offset); \
1420 \
1421 if (bfd_link_relocatable (info) \
1422 && (input_section->flags & SEC_DEBUGGING)) \
1423 { \
1424 /* Only remove relocations in debug sections since other \
1425 sections may require relocations. */ \
1426 Elf_Internal_Shdr *rel_hdr; \
1427 \
1428 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1429 \
1430 /* Avoid empty output section. */ \
1431 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1432 { \
1433 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1434 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1435 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1436 \
1437 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1438 \
1439 input_section->reloc_count--; \
1440 relend--; \
1441 rel--; \
1442 continue; \
1443 } \
1444 } \
1445 \
1446 rel->r_info = R_METAG_NONE; \
1447 rel->r_addend = 0; \
1448 continue; \
1449 }
1450
1451 /* Relocate a META ELF section.
1452
1453 The RELOCATE_SECTION function is called by the new ELF backend linker
1454 to handle the relocations for a section.
1455
1456 The relocs are always passed as Rela structures; if the section
1457 actually uses Rel structures, the r_addend field will always be
1458 zero.
1459
1460 This function is responsible for adjusting the section contents as
1461 necessary, and (if using Rela relocs and generating a relocatable
1462 output file) adjusting the reloc addend as necessary.
1463
1464 This function does not have to worry about setting the reloc
1465 address or the reloc symbol index.
1466
1467 LOCAL_SYMS is a pointer to the swapped in local symbols.
1468
1469 LOCAL_SECTIONS is an array giving the section in the input file
1470 corresponding to the st_shndx field of each local symbol.
1471
1472 The global hash table entry for the global symbols can be found
1473 via elf_sym_hashes (input_bfd).
1474
1475 When generating relocatable output, this function must handle
1476 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1477 going to be the section symbol corresponding to the output
1478 section, which means that the addend must be adjusted
1479 accordingly. */
1480
1481 static bfd_boolean
1482 elf_metag_relocate_section (bfd *output_bfd,
1483 struct bfd_link_info *info,
1484 bfd *input_bfd,
1485 asection *input_section,
1486 bfd_byte *contents,
1487 Elf_Internal_Rela *relocs,
1488 Elf_Internal_Sym *local_syms,
1489 asection **local_sections)
1490 {
1491 bfd_vma *local_got_offsets;
1492 Elf_Internal_Shdr *symtab_hdr;
1493 struct elf_link_hash_entry **eh_syms;
1494 struct elf_metag_link_hash_table *htab;
1495 Elf_Internal_Rela *rel;
1496 Elf_Internal_Rela *relend;
1497 asection *sreloc;
1498
1499 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1500 eh_syms = elf_sym_hashes (input_bfd);
1501 relend = relocs + input_section->reloc_count;
1502
1503 htab = metag_link_hash_table (info);
1504 local_got_offsets = elf_local_got_offsets (input_bfd);
1505
1506 sreloc = NULL;
1507
1508 for (rel = relocs; rel < relend; rel ++)
1509 {
1510 reloc_howto_type *howto;
1511 unsigned long r_symndx;
1512 Elf_Internal_Sym *sym;
1513 asection *sec;
1514 struct elf_metag_link_hash_entry *hh;
1515 bfd_vma relocation;
1516 bfd_reloc_status_type r;
1517 const char *name;
1518 int r_type;
1519
1520 r_type = ELF32_R_TYPE (rel->r_info);
1521
1522 if (r_type == R_METAG_GNU_VTINHERIT
1523 || r_type == R_METAG_GNU_VTENTRY
1524 || r_type == R_METAG_NONE)
1525 continue;
1526
1527 r_symndx = ELF32_R_SYM (rel->r_info);
1528
1529 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1530 hh = NULL;
1531 sym = NULL;
1532 sec = NULL;
1533
1534 if (r_symndx < symtab_hdr->sh_info)
1535 {
1536 sym = local_syms + r_symndx;
1537 sec = local_sections [r_symndx];
1538 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1539
1540 name = bfd_elf_string_from_elf_section
1541 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1542 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1543 }
1544 else
1545 {
1546 struct elf_link_hash_entry *eh;
1547 bfd_boolean unresolved_reloc, warned, ignored;
1548
1549 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1550 r_symndx, symtab_hdr, eh_syms,
1551 eh, sec, relocation,
1552 unresolved_reloc, warned, ignored);
1553
1554 name = eh->root.root.string;
1555 hh = (struct elf_metag_link_hash_entry *) eh;
1556 }
1557
1558 if (sec != NULL && discarded_section (sec))
1559 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1560 rel, relend, howto, contents);
1561
1562 if (bfd_link_relocatable (info))
1563 continue;
1564
1565 switch (r_type)
1566 {
1567 case R_METAG_ADDR32:
1568 case R_METAG_RELBRANCH:
1569 if ((input_section->flags & SEC_ALLOC) == 0)
1570 break;
1571
1572 if ((bfd_link_pic (info)
1573 && r_symndx != STN_UNDEF
1574 && (input_section->flags & SEC_ALLOC) != 0
1575 && (r_type != R_METAG_RELBRANCH
1576 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1577 || (!bfd_link_pic (info)
1578 && hh != NULL
1579 && hh->eh.dynindx != -1
1580 && !hh->eh.non_got_ref
1581 && ((hh->eh.def_dynamic
1582 && !hh->eh.def_regular)
1583 || hh->eh.root.type == bfd_link_hash_undefweak
1584 || hh->eh.root.type == bfd_link_hash_undefined)))
1585 {
1586 Elf_Internal_Rela outrel;
1587 bfd_boolean skip, relocate;
1588 bfd_byte *loc;
1589
1590 /* When generating a shared object, these relocations
1591 are copied into the output file to be resolved at run
1592 time. */
1593
1594 sreloc = elf_section_data (input_section)->sreloc;
1595 BFD_ASSERT (sreloc != NULL);
1596
1597 skip = FALSE;
1598 relocate = FALSE;
1599
1600 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1601 info,
1602 input_section,
1603 rel->r_offset);
1604 if (outrel.r_offset == (bfd_vma) -1)
1605 skip = TRUE;
1606 else if (outrel.r_offset == (bfd_vma) -2)
1607 skip = TRUE, relocate = TRUE;
1608 outrel.r_offset += (input_section->output_section->vma
1609 + input_section->output_offset);
1610
1611 if (skip)
1612 {
1613 memset (&outrel, 0, sizeof outrel);
1614 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1615 }
1616 else if (r_type == R_METAG_RELBRANCH)
1617 {
1618 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1619 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1620 outrel.r_addend = rel->r_addend;
1621 }
1622 else
1623 {
1624 /* h->dynindx may be -1 if this symbol was marked to
1625 become local. */
1626 if (hh == NULL
1627 || ((info->symbolic || hh->eh.dynindx == -1)
1628 && hh->eh.def_regular))
1629 {
1630 relocate = TRUE;
1631 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1632 outrel.r_addend = relocation + rel->r_addend;
1633 }
1634 else
1635 {
1636 BFD_ASSERT (hh->eh.dynindx != -1);
1637 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1638 outrel.r_addend = rel->r_addend;
1639 }
1640 }
1641
1642 loc = sreloc->contents;
1643 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1644 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1645 ++sreloc->reloc_count;
1646
1647 /* If this reloc is against an external symbol, we do
1648 not want to fiddle with the addend. Otherwise, we
1649 need to include the symbol value so that it becomes
1650 an addend for the dynamic reloc. */
1651 if (! relocate)
1652 continue;
1653 }
1654 break;
1655
1656 case R_METAG_RELBRANCH_PLT:
1657 /* Relocation is to the entry for this symbol in the
1658 procedure linkage table. */
1659
1660 if (hh == NULL)
1661 break;
1662
1663 if (hh->eh.forced_local)
1664 break;
1665
1666 if (hh->eh.plt.offset == (bfd_vma) -1 ||
1667 htab->splt == NULL)
1668 {
1669 /* We didn't make a PLT entry for this symbol. This
1670 happens when statically linking PIC code, or when
1671 using -Bsymbolic. */
1672 break;
1673 }
1674
1675 relocation = (htab->splt->output_section->vma
1676 + htab->splt->output_offset
1677 + hh->eh.plt.offset);
1678 break;
1679 case R_METAG_HI16_GOTPC:
1680 case R_METAG_LO16_GOTPC:
1681 BFD_ASSERT (htab->sgot != NULL);
1682
1683 relocation = (htab->sgot->output_section->vma +
1684 htab->sgot->output_offset);
1685 relocation += GOT_REG_OFFSET;
1686 relocation -= (input_section->output_section->vma
1687 + input_section->output_offset
1688 + rel->r_offset);
1689 break;
1690 case R_METAG_HI16_GOTOFF:
1691 case R_METAG_LO16_GOTOFF:
1692 case R_METAG_GETSET_GOTOFF:
1693 BFD_ASSERT (htab->sgot != NULL);
1694
1695 relocation -= (htab->sgot->output_section->vma +
1696 htab->sgot->output_offset);
1697 relocation -= GOT_REG_OFFSET;
1698 break;
1699 case R_METAG_GETSET_GOT:
1700 {
1701 bfd_vma off;
1702 bfd_boolean do_got = 0;
1703
1704 /* Relocation is to the entry for this symbol in the
1705 global offset table. */
1706 if (hh != NULL)
1707 {
1708 bfd_boolean dyn;
1709
1710 off = hh->eh.got.offset;
1711 dyn = htab->etab.dynamic_sections_created;
1712 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1713 bfd_link_pic (info),
1714 &hh->eh))
1715 {
1716 /* If we aren't going to call finish_dynamic_symbol,
1717 then we need to handle initialisation of the .got
1718 entry and create needed relocs here. Since the
1719 offset must always be a multiple of 4, we use the
1720 least significant bit to record whether we have
1721 initialised it already. */
1722 if ((off & 1) != 0)
1723 off &= ~1;
1724 else
1725 {
1726 hh->eh.got.offset |= 1;
1727 do_got = 1;
1728 }
1729 }
1730 }
1731 else
1732 {
1733 /* Local symbol case. */
1734 if (local_got_offsets == NULL)
1735 abort ();
1736
1737 off = local_got_offsets[r_symndx];
1738
1739 /* The offset must always be a multiple of 4. We use
1740 the least significant bit to record whether we have
1741 already generated the necessary reloc. */
1742 if ((off & 1) != 0)
1743 off &= ~1;
1744 else
1745 {
1746 local_got_offsets[r_symndx] |= 1;
1747 do_got = 1;
1748 }
1749 }
1750
1751 if (do_got)
1752 {
1753 if (bfd_link_pic (info))
1754 {
1755 /* Output a dynamic relocation for this GOT entry.
1756 In this case it is relative to the base of the
1757 object because the symbol index is zero. */
1758 Elf_Internal_Rela outrel;
1759 bfd_byte *loc;
1760 asection *s = htab->srelgot;
1761
1762 outrel.r_offset = (off
1763 + htab->sgot->output_offset
1764 + htab->sgot->output_section->vma);
1765 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1766 outrel.r_addend = relocation;
1767 loc = s->contents;
1768 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1769 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1770 }
1771 else
1772 bfd_put_32 (output_bfd, relocation,
1773 htab->sgot->contents + off);
1774 }
1775
1776 if (off >= (bfd_vma) -2)
1777 abort ();
1778
1779 relocation = off - GOT_REG_OFFSET;
1780 }
1781 break;
1782 case R_METAG_TLS_GD:
1783 case R_METAG_TLS_IE:
1784 {
1785 /* XXXMJF There is room here for optimisations. For example
1786 converting from GD->IE, etc. */
1787 bfd_vma off;
1788 int indx;
1789 char tls_type;
1790
1791 if (htab->sgot == NULL)
1792 abort();
1793
1794 indx = 0;
1795 if (hh != NULL)
1796 {
1797 bfd_boolean dyn;
1798 dyn = htab->etab.dynamic_sections_created;
1799
1800 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1801 bfd_link_pic (info),
1802 &hh->eh)
1803 && (!bfd_link_pic (info)
1804 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1805 {
1806 indx = hh->eh.dynindx;
1807 }
1808 off = hh->eh.got.offset;
1809 tls_type = hh->tls_type;
1810 }
1811 else
1812 {
1813 /* Local symbol case. */
1814 if (local_got_offsets == NULL)
1815 abort ();
1816
1817 off = local_got_offsets[r_symndx];
1818 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1819 }
1820
1821 if (tls_type == GOT_UNKNOWN)
1822 abort();
1823
1824 if ((off & 1) != 0)
1825 off &= ~1;
1826 else
1827 {
1828 bfd_boolean need_relocs = FALSE;
1829 Elf_Internal_Rela outrel;
1830 bfd_byte *loc = NULL;
1831 int cur_off = off;
1832
1833 /* The GOT entries have not been initialized yet. Do it
1834 now, and emit any relocations. If both an IE GOT and a
1835 GD GOT are necessary, we emit the GD first. */
1836
1837 if ((bfd_link_pic (info) || indx != 0)
1838 && (hh == NULL
1839 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1840 || hh->eh.root.type != bfd_link_hash_undefweak))
1841 {
1842 need_relocs = TRUE;
1843 loc = htab->srelgot->contents;
1844 /* FIXME (CAO): Should this be reloc_count++ ? */
1845 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
1846 }
1847
1848 if (tls_type & GOT_TLS_GD)
1849 {
1850 if (need_relocs)
1851 {
1852 outrel.r_offset = (cur_off
1853 + htab->sgot->output_section->vma
1854 + htab->sgot->output_offset);
1855 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1856 outrel.r_addend = 0;
1857 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
1858
1859 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1860 htab->srelgot->reloc_count++;
1861 loc += sizeof (Elf32_External_Rela);
1862
1863 if (indx == 0)
1864 bfd_put_32 (output_bfd, 0,
1865 htab->sgot->contents + cur_off + 4);
1866 else
1867 {
1868 bfd_put_32 (output_bfd, 0,
1869 htab->sgot->contents + cur_off + 4);
1870 outrel.r_info = ELF32_R_INFO (indx,
1871 R_METAG_TLS_DTPOFF);
1872 outrel.r_offset += 4;
1873 bfd_elf32_swap_reloca_out (output_bfd,
1874 &outrel, loc);
1875 htab->srelgot->reloc_count++;
1876 loc += sizeof (Elf32_External_Rela);
1877 }
1878 }
1879 else
1880 {
1881 /* We don't support changing the TLS model. */
1882 abort ();
1883 }
1884
1885 cur_off += 8;
1886 }
1887
1888 if (tls_type & GOT_TLS_IE)
1889 {
1890 if (need_relocs)
1891 {
1892 outrel.r_offset = (cur_off
1893 + htab->sgot->output_section->vma
1894 + htab->sgot->output_offset);
1895 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1896
1897 if (indx == 0)
1898 outrel.r_addend = relocation - dtpoff_base (info);
1899 else
1900 outrel.r_addend = 0;
1901
1902 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1903 htab->srelgot->reloc_count++;
1904 loc += sizeof (Elf32_External_Rela);
1905 }
1906 else
1907 bfd_put_32 (output_bfd, tpoff (info, relocation),
1908 htab->sgot->contents + cur_off);
1909
1910 cur_off += 4;
1911 }
1912
1913 if (hh != NULL)
1914 hh->eh.got.offset |= 1;
1915 else
1916 local_got_offsets[r_symndx] |= 1;
1917 }
1918
1919 /* Add the base of the GOT to the relocation value. */
1920 relocation = off - GOT_REG_OFFSET;
1921
1922 break;
1923 }
1924
1925 case R_METAG_TLS_IENONPIC_HI16:
1926 case R_METAG_TLS_IENONPIC_LO16:
1927 case R_METAG_TLS_LE_HI16:
1928 case R_METAG_TLS_LE_LO16:
1929 if (bfd_link_pic (info))
1930 {
1931 (*_bfd_error_handler)
1932 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1933 input_bfd, input_section,
1934 (long) rel->r_offset, howto->name);
1935 return FALSE;
1936 }
1937 else
1938 relocation = tpoff (info, relocation);
1939 break;
1940 case R_METAG_TLS_LDO_HI16:
1941 case R_METAG_TLS_LDO_LO16:
1942 if (! bfd_link_pic (info))
1943 relocation = tpoff (info, relocation);
1944 else
1945 relocation -= dtpoff_base (info);
1946 break;
1947 case R_METAG_TLS_LDM:
1948 {
1949 bfd_vma off;
1950
1951 if (htab->sgot == NULL)
1952 abort();
1953 off = htab->tls_ldm_got.offset;
1954 if (off & 1)
1955 off &= ~1;
1956 else
1957 {
1958 Elf_Internal_Rela outrel;
1959 bfd_byte *loc;
1960
1961 outrel.r_offset = (off
1962 + htab->sgot->output_section->vma
1963 + htab->sgot->output_offset);
1964
1965 outrel.r_addend = 0;
1966 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1967 loc = htab->srelgot->contents;
1968 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1969 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1970 htab->tls_ldm_got.offset |= 1;
1971 }
1972
1973 relocation = off - GOT_REG_OFFSET;
1974 break;
1975 }
1976 default:
1977 break;
1978 }
1979
1980 r = metag_final_link_relocate (howto, input_bfd, input_section,
1981 contents, rel, relocation, hh, htab,
1982 sec);
1983
1984 if (r != bfd_reloc_ok)
1985 {
1986 const char * msg = (const char *) NULL;
1987
1988 switch (r)
1989 {
1990 case bfd_reloc_overflow:
1991 r = info->callbacks->reloc_overflow
1992 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1993 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1994 break;
1995
1996 case bfd_reloc_undefined:
1997 r = info->callbacks->undefined_symbol
1998 (info, name, input_bfd, input_section, rel->r_offset,
1999 TRUE);
2000 break;
2001
2002 case bfd_reloc_outofrange:
2003 msg = _("internal error: out of range error");
2004 break;
2005
2006 case bfd_reloc_notsupported:
2007 msg = _("internal error: unsupported relocation error");
2008 break;
2009
2010 case bfd_reloc_dangerous:
2011 msg = _("internal error: dangerous relocation");
2012 break;
2013
2014 default:
2015 msg = _("internal error: unknown error");
2016 break;
2017 }
2018
2019 if (msg)
2020 r = info->callbacks->warning
2021 (info, msg, name, input_bfd, input_section, rel->r_offset);
2022
2023 if (! r)
2024 return FALSE;
2025 }
2026 }
2027
2028 return TRUE;
2029 }
2030
2031 /* Create the .plt and .got sections, and set up our hash table
2032 short-cuts to various dynamic sections. */
2033
2034 static bfd_boolean
2035 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2036 {
2037 struct elf_metag_link_hash_table *htab;
2038 struct elf_link_hash_entry *eh;
2039 struct bfd_link_hash_entry *bh;
2040 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2041
2042 /* Don't try to create the .plt and .got twice. */
2043 htab = metag_link_hash_table (info);
2044 if (htab->splt != NULL)
2045 return TRUE;
2046
2047 /* Call the generic code to do most of the work. */
2048 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2049 return FALSE;
2050
2051 htab->sgot = bfd_get_linker_section (abfd, ".got");
2052 if (! htab->sgot)
2053 return FALSE;
2054
2055 htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt",
2056 (SEC_ALLOC | SEC_LOAD |
2057 SEC_HAS_CONTENTS |
2058 SEC_IN_MEMORY |
2059 SEC_LINKER_CREATED));
2060 if (htab->sgotplt == NULL
2061 || !bfd_set_section_alignment (abfd, htab->sgotplt, 2))
2062 return FALSE;
2063
2064 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2065 section. We don't do this in the linker script because we don't want
2066 to define the symbol if we are not creating a global offset table. */
2067 bh = NULL;
2068 if (!(_bfd_generic_link_add_one_symbol
2069 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot,
2070 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2071 return FALSE;
2072 eh = (struct elf_link_hash_entry *) bh;
2073 eh->def_regular = 1;
2074 eh->type = STT_OBJECT;
2075 eh->other = STV_HIDDEN;
2076
2077 if (! bfd_link_executable (info)
2078 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2079 return FALSE;
2080
2081 elf_hash_table (info)->hgot = eh;
2082
2083 htab->splt = bfd_get_linker_section (abfd, ".plt");
2084 htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt");
2085
2086 htab->srelgot = bfd_get_linker_section (abfd, ".rela.got");
2087
2088 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
2089 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
2090
2091 return TRUE;
2092 }
2093
2094 /* Look through the relocs for a section during the first phase, and
2095 calculate needed space in the global offset table, procedure linkage
2096 table, and dynamic reloc sections. At this point we haven't
2097 necessarily read all the input files. */
2098
2099 static bfd_boolean
2100 elf_metag_check_relocs (bfd *abfd,
2101 struct bfd_link_info *info,
2102 asection *sec,
2103 const Elf_Internal_Rela *relocs)
2104 {
2105 Elf_Internal_Shdr *symtab_hdr;
2106 struct elf_link_hash_entry **eh_syms;
2107 const Elf_Internal_Rela *rel;
2108 const Elf_Internal_Rela *rel_end;
2109 struct elf_metag_link_hash_table *htab;
2110 asection *sreloc;
2111 bfd *dynobj;
2112 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2113
2114 if (bfd_link_relocatable (info))
2115 return TRUE;
2116
2117 htab = metag_link_hash_table (info);
2118 dynobj = htab->etab.dynobj;
2119 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2120 eh_syms = elf_sym_hashes (abfd);
2121 sreloc = NULL;
2122
2123 if (htab == NULL)
2124 return FALSE;
2125
2126 rel_end = relocs + sec->reloc_count;
2127 for (rel = relocs; rel < rel_end; rel++)
2128 {
2129 int r_type;
2130 struct elf_metag_link_hash_entry *hh;
2131 Elf_Internal_Sym *isym;
2132 unsigned long r_symndx;
2133
2134 r_symndx = ELF32_R_SYM (rel->r_info);
2135 r_type = ELF32_R_TYPE (rel->r_info);
2136 if (r_symndx < symtab_hdr->sh_info)
2137 {
2138 /* A local symbol. */
2139 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2140 abfd, r_symndx);
2141 if (isym == NULL)
2142 return FALSE;
2143
2144 hh = NULL;
2145 }
2146 else
2147 {
2148 isym = NULL;
2149
2150 hh = (struct elf_metag_link_hash_entry *)
2151 eh_syms[r_symndx - symtab_hdr->sh_info];
2152 while (hh->eh.root.type == bfd_link_hash_indirect
2153 || hh->eh.root.type == bfd_link_hash_warning)
2154 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2155
2156 /* PR15323, ref flags aren't set for references in the same
2157 object. */
2158 hh->eh.root.non_ir_ref = 1;
2159 }
2160
2161 /* Some relocs require a global offset table. */
2162 if (htab->sgot == NULL)
2163 {
2164 switch (r_type)
2165 {
2166 case R_METAG_TLS_GD:
2167 case R_METAG_TLS_LDM:
2168 case R_METAG_TLS_IE:
2169 if (bfd_link_pic (info))
2170 info->flags |= DF_STATIC_TLS;
2171 /* Fall through. */
2172
2173 case R_METAG_HI16_GOTOFF:
2174 case R_METAG_LO16_GOTOFF:
2175 case R_METAG_GETSET_GOTOFF:
2176 case R_METAG_GETSET_GOT:
2177 case R_METAG_HI16_GOTPC:
2178 case R_METAG_LO16_GOTPC:
2179 if (dynobj == NULL)
2180 htab->etab.dynobj = dynobj = abfd;
2181 if (!elf_metag_create_dynamic_sections (dynobj, info))
2182 return FALSE;
2183 break;
2184
2185 default:
2186 break;
2187 }
2188 }
2189
2190 switch (r_type)
2191 {
2192 case R_METAG_TLS_IE:
2193 case R_METAG_TLS_GD:
2194 case R_METAG_GETSET_GOT:
2195 switch (r_type)
2196 {
2197 default:
2198 tls_type = GOT_NORMAL;
2199 break;
2200 case R_METAG_TLS_IE:
2201 tls_type = GOT_TLS_IE;
2202 break;
2203 case R_METAG_TLS_GD:
2204 tls_type = GOT_TLS_GD;
2205 break;
2206 }
2207
2208 if (hh != NULL)
2209 {
2210 hh->eh.got.refcount += 1;
2211 old_tls_type = hh->tls_type;
2212 }
2213 else
2214 {
2215 bfd_signed_vma *local_got_refcounts;
2216
2217 /* This is a global offset table entry for a local
2218 symbol. */
2219 local_got_refcounts = elf_local_got_refcounts (abfd);
2220 if (local_got_refcounts == NULL)
2221 {
2222 bfd_size_type size;
2223
2224 size = symtab_hdr->sh_info;
2225 size *= sizeof (bfd_signed_vma);
2226 /* Add in space to store the local GOT TLS types. */
2227 size += symtab_hdr->sh_info;
2228 local_got_refcounts = ((bfd_signed_vma *)
2229 bfd_zalloc (abfd, size));
2230 if (local_got_refcounts == NULL)
2231 return FALSE;
2232 elf_local_got_refcounts (abfd) = local_got_refcounts;
2233 memset (metag_elf_local_got_tls_type (abfd),
2234 GOT_UNKNOWN, symtab_hdr->sh_info);
2235 }
2236 local_got_refcounts[r_symndx] += 1;
2237 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2238 }
2239
2240 if (old_tls_type != tls_type)
2241 {
2242 if (hh != NULL)
2243 {
2244 hh->tls_type = tls_type;
2245 }
2246 else
2247 {
2248 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2249 }
2250 }
2251
2252 break;
2253
2254 case R_METAG_TLS_LDM:
2255 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2256 break;
2257
2258 case R_METAG_RELBRANCH_PLT:
2259 /* This symbol requires a procedure linkage table entry. We
2260 actually build the entry in adjust_dynamic_symbol,
2261 because this might be a case of linking PIC code without
2262 linking in any dynamic objects, in which case we don't
2263 need to generate a procedure linkage table after all. */
2264
2265 /* If this is a local symbol, we resolve it directly without
2266 creating a procedure linkage table entry. */
2267 if (hh == NULL)
2268 continue;
2269
2270 if (hh->eh.forced_local)
2271 break;
2272
2273 hh->eh.needs_plt = 1;
2274 hh->eh.plt.refcount += 1;
2275 break;
2276
2277 case R_METAG_HIADDR16:
2278 case R_METAG_LOADDR16:
2279 /* Let's help debug shared library creation. These relocs
2280 cannot be used in shared libs. Don't error out for
2281 sections we don't care about, such as debug sections or
2282 non-constant sections. */
2283 if (bfd_link_pic (info)
2284 && (sec->flags & SEC_ALLOC) != 0
2285 && (sec->flags & SEC_READONLY) != 0)
2286 {
2287 const char *name;
2288
2289 if (hh)
2290 name = hh->eh.root.root.string;
2291 else
2292 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2293 (*_bfd_error_handler)
2294 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2295 abfd, elf_metag_howto_table[r_type].name, name);
2296 bfd_set_error (bfd_error_bad_value);
2297 return FALSE;
2298 }
2299
2300 /* Fall through. */
2301 case R_METAG_ADDR32:
2302 case R_METAG_RELBRANCH:
2303 case R_METAG_GETSETOFF:
2304 if (hh != NULL && !bfd_link_pic (info))
2305 {
2306 hh->eh.non_got_ref = 1;
2307 hh->eh.plt.refcount += 1;
2308 }
2309
2310 /* If we are creating a shared library, and this is a reloc
2311 against a global symbol, or a non PC relative reloc
2312 against a local symbol, then we need to copy the reloc
2313 into the shared library. However, if we are linking with
2314 -Bsymbolic, we do not need to copy a reloc against a
2315 global symbol which is defined in an object we are
2316 including in the link (i.e., DEF_REGULAR is set). At
2317 this point we have not seen all the input files, so it is
2318 possible that DEF_REGULAR is not set now but will be set
2319 later (it is never cleared). We account for that
2320 possibility below by storing information in the
2321 dyn_relocs field of the hash table entry. A similar
2322 situation occurs when creating shared libraries and symbol
2323 visibility changes render the symbol local.
2324
2325 If on the other hand, we are creating an executable, we
2326 may need to keep relocations for symbols satisfied by a
2327 dynamic library if we manage to avoid copy relocs for the
2328 symbol. */
2329 if ((bfd_link_pic (info)
2330 && (sec->flags & SEC_ALLOC) != 0
2331 && (r_type != R_METAG_RELBRANCH
2332 || (hh != NULL
2333 && (! info->symbolic
2334 || hh->eh.root.type == bfd_link_hash_defweak
2335 || !hh->eh.def_regular))))
2336 || (!bfd_link_pic (info)
2337 && (sec->flags & SEC_ALLOC) != 0
2338 && hh != NULL
2339 && (hh->eh.root.type == bfd_link_hash_defweak
2340 || !hh->eh.def_regular)))
2341 {
2342 struct elf_metag_dyn_reloc_entry *hdh_p;
2343 struct elf_metag_dyn_reloc_entry **hdh_head;
2344
2345 if (dynobj == NULL)
2346 htab->etab.dynobj = dynobj = abfd;
2347
2348 /* When creating a shared object, we must copy these
2349 relocs into the output file. We create a reloc
2350 section in dynobj and make room for the reloc. */
2351 if (sreloc == NULL)
2352 {
2353 sreloc = _bfd_elf_make_dynamic_reloc_section
2354 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2355
2356 if (sreloc == NULL)
2357 {
2358 bfd_set_error (bfd_error_bad_value);
2359 return FALSE;
2360 }
2361
2362 elf_section_data (sec)->sreloc = sreloc;
2363 }
2364
2365 /* If this is a global symbol, we count the number of
2366 relocations we need for this symbol. */
2367 if (hh != NULL)
2368 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2369 else
2370 {
2371 /* Track dynamic relocs needed for local syms too. */
2372 asection *sr;
2373 void *vpp;
2374
2375 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2376 if (sr == NULL)
2377 sr = sec;
2378
2379 vpp = &elf_section_data (sr)->local_dynrel;
2380 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2381 }
2382
2383 hdh_p = *hdh_head;
2384 if (hdh_p == NULL || hdh_p->sec != sec)
2385 {
2386 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2387 bfd_alloc (dynobj, sizeof *hdh_p));
2388 if (hdh_p == NULL)
2389 return FALSE;
2390 hdh_p->hdh_next = *hdh_head;
2391 *hdh_head = hdh_p;
2392 hdh_p->sec = sec;
2393 hdh_p->count = 0;
2394 hdh_p->relative_count = 0;
2395 }
2396
2397 hdh_p->count += 1;
2398 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2399 hdh_p->relative_count += 1;
2400 }
2401 break;
2402
2403 /* This relocation describes the C++ object vtable hierarchy.
2404 Reconstruct it for later use during GC. */
2405 case R_METAG_GNU_VTINHERIT:
2406 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2407 rel->r_offset))
2408 return FALSE;
2409 break;
2410
2411 /* This relocation describes which C++ vtable entries are actually
2412 used. Record for later use during GC. */
2413 case R_METAG_GNU_VTENTRY:
2414 BFD_ASSERT (hh != NULL);
2415 if (hh != NULL
2416 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2417 return FALSE;
2418 break;
2419 }
2420 }
2421
2422 return TRUE;
2423 }
2424
2425 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2426
2427 static void
2428 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2429 struct elf_link_hash_entry *eh_dir,
2430 struct elf_link_hash_entry *eh_ind)
2431 {
2432 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2433
2434 hh_dir = metag_elf_hash_entry (eh_dir);
2435 hh_ind = metag_elf_hash_entry (eh_ind);
2436
2437 if (hh_ind->dyn_relocs != NULL)
2438 {
2439 if (hh_dir->dyn_relocs != NULL)
2440 {
2441 struct elf_metag_dyn_reloc_entry **hdh_pp;
2442 struct elf_metag_dyn_reloc_entry *hdh_p;
2443
2444 if (eh_ind->root.type == bfd_link_hash_indirect)
2445 abort ();
2446
2447 /* Add reloc counts against the weak sym to the strong sym
2448 list. Merge any entries against the same section. */
2449 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2450 {
2451 struct elf_metag_dyn_reloc_entry *hdh_q;
2452
2453 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2454 hdh_q = hdh_q->hdh_next)
2455 if (hdh_q->sec == hdh_p->sec)
2456 {
2457 hdh_q->relative_count += hdh_p->relative_count;
2458 hdh_q->count += hdh_p->count;
2459 *hdh_pp = hdh_p->hdh_next;
2460 break;
2461 }
2462 if (hdh_q == NULL)
2463 hdh_pp = &hdh_p->hdh_next;
2464 }
2465 *hdh_pp = hh_dir->dyn_relocs;
2466 }
2467
2468 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2469 hh_ind->dyn_relocs = NULL;
2470 }
2471
2472 if (eh_ind->root.type == bfd_link_hash_indirect
2473 && eh_dir->got.refcount <= 0)
2474 {
2475 hh_dir->tls_type = hh_ind->tls_type;
2476 hh_ind->tls_type = GOT_UNKNOWN;
2477 }
2478
2479 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2480 }
2481
2482 /* Adjust a symbol defined by a dynamic object and referenced by a
2483 regular object. The current definition is in some section of the
2484 dynamic object, but we're not including those sections. We have to
2485 change the definition to something the rest of the link can
2486 understand. */
2487
2488 static bfd_boolean
2489 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2490 struct elf_link_hash_entry *eh)
2491 {
2492 struct elf_metag_link_hash_table *htab;
2493 struct elf_metag_link_hash_entry *hh;
2494 struct elf_metag_dyn_reloc_entry *hdh_p;
2495 asection *s;
2496
2497 /* If this is a function, put it in the procedure linkage table. We
2498 will fill in the contents of the procedure linkage table later,
2499 when we know the address of the .got section. */
2500 if (eh->type == STT_FUNC
2501 || eh->needs_plt)
2502 {
2503 if (eh->plt.refcount <= 0
2504 || SYMBOL_CALLS_LOCAL (info, eh)
2505 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2506 && eh->root.type == bfd_link_hash_undefweak))
2507 {
2508 /* This case can occur if we saw a PLT reloc in an input
2509 file, but the symbol was never referred to by a dynamic
2510 object. In such a case, we don't actually need to build
2511 a procedure linkage table, and we can just do a PCREL
2512 reloc instead. */
2513 eh->plt.offset = (bfd_vma) -1;
2514 eh->needs_plt = 0;
2515 }
2516
2517 return TRUE;
2518 }
2519 else
2520 eh->plt.offset = (bfd_vma) -1;
2521
2522 /* If this is a weak symbol, and there is a real definition, the
2523 processor independent code will have arranged for us to see the
2524 real definition first, and we can just use the same value. */
2525 if (eh->u.weakdef != NULL)
2526 {
2527 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2528 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2529 abort ();
2530 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2531 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2532 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2533 return TRUE;
2534 }
2535
2536 /* This is a reference to a symbol defined by a dynamic object which
2537 is not a function. */
2538
2539 /* If we are creating a shared library, we must presume that the
2540 only references to the symbol are via the global offset table.
2541 For such cases we need not do anything here; the relocations will
2542 be handled correctly by relocate_section. */
2543 if (bfd_link_pic (info))
2544 return TRUE;
2545
2546 /* If there are no references to this symbol that do not use the
2547 GOT, we don't need to generate a copy reloc. */
2548 if (!eh->non_got_ref)
2549 return TRUE;
2550
2551 /* If -z nocopyreloc was given, we won't generate them either. */
2552 if (info->nocopyreloc)
2553 {
2554 eh->non_got_ref = 0;
2555 return TRUE;
2556 }
2557
2558 hh = (struct elf_metag_link_hash_entry *) eh;
2559 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2560 {
2561 s = hdh_p->sec->output_section;
2562 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2563 break;
2564 }
2565
2566 /* If we didn't find any dynamic relocs in read-only sections, then
2567 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2568 if (hdh_p == NULL)
2569 {
2570 eh->non_got_ref = 0;
2571 return TRUE;
2572 }
2573
2574 /* We must allocate the symbol in our .dynbss section, which will
2575 become part of the .bss section of the executable. There will be
2576 an entry for this symbol in the .dynsym section. The dynamic
2577 object will contain position independent code, so all references
2578 from the dynamic object to this symbol will go through the global
2579 offset table. The dynamic linker will use the .dynsym entry to
2580 determine the address it must put in the global offset table, so
2581 both the dynamic object and the regular object will refer to the
2582 same memory location for the variable. */
2583
2584 htab = metag_link_hash_table (info);
2585
2586 /* We must generate a COPY reloc to tell the dynamic linker to
2587 copy the initial value out of the dynamic object and into the
2588 runtime process image. */
2589 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2590 {
2591 htab->srelbss->size += sizeof (Elf32_External_Rela);
2592 eh->needs_copy = 1;
2593 }
2594
2595 s = htab->sdynbss;
2596
2597 return _bfd_elf_adjust_dynamic_copy (info, eh, s);
2598 }
2599
2600 /* Allocate space in .plt, .got and associated reloc sections for
2601 global syms. */
2602
2603 static bfd_boolean
2604 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2605 {
2606 struct bfd_link_info *info;
2607 struct elf_metag_link_hash_table *htab;
2608 struct elf_metag_link_hash_entry *hh;
2609 struct elf_metag_dyn_reloc_entry *hdh_p;
2610
2611 if (eh->root.type == bfd_link_hash_indirect)
2612 return TRUE;
2613
2614 if (eh->root.type == bfd_link_hash_warning)
2615 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2616
2617 info = inf;
2618 htab = metag_link_hash_table (info);
2619
2620 if (htab->etab.dynamic_sections_created
2621 && eh->plt.refcount > 0)
2622 {
2623 /* Make sure this symbol is output as a dynamic symbol.
2624 Undefined weak syms won't yet be marked as dynamic. */
2625 if (eh->dynindx == -1
2626 && !eh->forced_local)
2627 {
2628 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2629 return FALSE;
2630 }
2631
2632 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh))
2633 {
2634 asection *s = htab->splt;
2635
2636 /* If this is the first .plt entry, make room for the special
2637 first entry. */
2638 if (s->size == 0)
2639 s->size += PLT_ENTRY_SIZE;
2640
2641 eh->plt.offset = s->size;
2642
2643 /* If this symbol is not defined in a regular file, and we are
2644 not generating a shared library, then set the symbol to this
2645 location in the .plt. This is required to make function
2646 pointers compare as equal between the normal executable and
2647 the shared library. */
2648 if (! bfd_link_pic (info)
2649 && !eh->def_regular)
2650 {
2651 eh->root.u.def.section = s;
2652 eh->root.u.def.value = eh->plt.offset;
2653 }
2654
2655 /* Make room for this entry. */
2656 s->size += PLT_ENTRY_SIZE;
2657
2658 /* We also need to make an entry in the .got.plt section, which
2659 will be placed in the .got section by the linker script. */
2660 htab->sgotplt->size += 4;
2661
2662 /* We also need to make an entry in the .rel.plt section. */
2663 htab->srelplt->size += sizeof (Elf32_External_Rela);
2664 }
2665 else
2666 {
2667 eh->plt.offset = (bfd_vma) -1;
2668 eh->needs_plt = 0;
2669 }
2670 }
2671 else
2672 {
2673 eh->plt.offset = (bfd_vma) -1;
2674 eh->needs_plt = 0;
2675 }
2676
2677 if (eh->got.refcount > 0)
2678 {
2679 asection *s;
2680 bfd_boolean dyn;
2681 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2682
2683 /* Make sure this symbol is output as a dynamic symbol.
2684 Undefined weak syms won't yet be marked as dynamic. */
2685 if (eh->dynindx == -1
2686 && !eh->forced_local)
2687 {
2688 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2689 return FALSE;
2690 }
2691
2692 s = htab->sgot;
2693
2694 eh->got.offset = s->size;
2695 s->size += 4;
2696 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2697 if (tls_type == GOT_TLS_GD)
2698 s->size += 4;
2699 dyn = htab->etab.dynamic_sections_created;
2700 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2701 R_METAG_TLS_GD needs one if local symbol and two if global. */
2702 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2703 || (tls_type == GOT_TLS_IE && dyn))
2704 htab->srelgot->size += sizeof (Elf32_External_Rela);
2705 else if (tls_type == GOT_TLS_GD)
2706 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2707 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2708 bfd_link_pic (info),
2709 eh))
2710 htab->srelgot->size += sizeof (Elf32_External_Rela);
2711 }
2712 else
2713 eh->got.offset = (bfd_vma) -1;
2714
2715 hh = (struct elf_metag_link_hash_entry *) eh;
2716 if (hh->dyn_relocs == NULL)
2717 return TRUE;
2718
2719 /* If this is a -Bsymbolic shared link, then we need to discard all
2720 space allocated for dynamic pc-relative relocs against symbols
2721 defined in a regular object. For the normal shared case, discard
2722 space for relocs that have become local due to symbol visibility
2723 changes. */
2724 if (bfd_link_pic (info))
2725 {
2726 if (SYMBOL_CALLS_LOCAL (info, eh))
2727 {
2728 struct elf_metag_dyn_reloc_entry **hdh_pp;
2729
2730 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2731 {
2732 hdh_p->count -= hdh_p->relative_count;
2733 hdh_p->relative_count = 0;
2734 if (hdh_p->count == 0)
2735 *hdh_pp = hdh_p->hdh_next;
2736 else
2737 hdh_pp = &hdh_p->hdh_next;
2738 }
2739 }
2740
2741 /* Also discard relocs on undefined weak syms with non-default
2742 visibility. */
2743 if (hh->dyn_relocs != NULL
2744 && eh->root.type == bfd_link_hash_undefweak)
2745 {
2746 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2747 hh->dyn_relocs = NULL;
2748
2749 /* Make sure undefined weak symbols are output as a dynamic
2750 symbol in PIEs. */
2751 else if (eh->dynindx == -1
2752 && !eh->forced_local)
2753 {
2754 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2755 return FALSE;
2756 }
2757 }
2758 }
2759 else
2760 {
2761 /* For the non-shared case, discard space for relocs against
2762 symbols which turn out to need copy relocs or are not
2763 dynamic. */
2764 if (!eh->non_got_ref
2765 && ((eh->def_dynamic
2766 && !eh->def_regular)
2767 || (htab->etab.dynamic_sections_created
2768 && (eh->root.type == bfd_link_hash_undefweak
2769 || eh->root.type == bfd_link_hash_undefined))))
2770 {
2771 /* Make sure this symbol is output as a dynamic symbol.
2772 Undefined weak syms won't yet be marked as dynamic. */
2773 if (eh->dynindx == -1
2774 && !eh->forced_local)
2775 {
2776 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2777 return FALSE;
2778 }
2779
2780 /* If that succeeded, we know we'll be keeping all the
2781 relocs. */
2782 if (eh->dynindx != -1)
2783 goto keep;
2784 }
2785
2786 hh->dyn_relocs = NULL;
2787 return TRUE;
2788
2789 keep: ;
2790 }
2791
2792 /* Finally, allocate space. */
2793 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2794 {
2795 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2796 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2797 }
2798
2799 return TRUE;
2800 }
2801
2802 /* Find any dynamic relocs that apply to read-only sections. */
2803
2804 static bfd_boolean
2805 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2806 {
2807 struct elf_metag_link_hash_entry *hh;
2808 struct elf_metag_dyn_reloc_entry *hdh_p;
2809
2810 if (eh->root.type == bfd_link_hash_warning)
2811 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2812
2813 hh = (struct elf_metag_link_hash_entry *) eh;
2814 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2815 {
2816 asection *s = hdh_p->sec->output_section;
2817
2818 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2819 {
2820 struct bfd_link_info *info = inf;
2821
2822 info->flags |= DF_TEXTREL;
2823
2824 /* Not an error, just cut short the traversal. */
2825 return FALSE;
2826 }
2827 }
2828 return TRUE;
2829 }
2830
2831 /* Set the sizes of the dynamic sections. */
2832
2833 static bfd_boolean
2834 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2835 struct bfd_link_info *info)
2836 {
2837 struct elf_metag_link_hash_table *htab;
2838 bfd *dynobj;
2839 bfd *ibfd;
2840 asection *s;
2841 bfd_boolean relocs;
2842
2843 htab = metag_link_hash_table (info);
2844 dynobj = htab->etab.dynobj;
2845 if (dynobj == NULL)
2846 abort ();
2847
2848 if (htab->etab.dynamic_sections_created)
2849 {
2850 /* Set the contents of the .interp section to the interpreter. */
2851 if (bfd_link_executable (info))
2852 {
2853 s = bfd_get_linker_section (dynobj, ".interp");
2854 if (s == NULL)
2855 abort ();
2856 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2857 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2858 }
2859 }
2860
2861 /* Set up .got offsets for local syms, and space for local dynamic
2862 relocs. */
2863 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2864 {
2865 bfd_signed_vma *local_got;
2866 bfd_signed_vma *end_local_got;
2867 bfd_size_type locsymcount;
2868 Elf_Internal_Shdr *symtab_hdr;
2869 asection *srel;
2870 char *local_tls_type;
2871
2872 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2873 continue;
2874
2875 for (s = ibfd->sections; s != NULL; s = s->next)
2876 {
2877 struct elf_metag_dyn_reloc_entry *hdh_p;
2878
2879 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2880 elf_section_data (s)->local_dynrel);
2881 hdh_p != NULL;
2882 hdh_p = hdh_p->hdh_next)
2883 {
2884 if (!bfd_is_abs_section (hdh_p->sec)
2885 && bfd_is_abs_section (hdh_p->sec->output_section))
2886 {
2887 /* Input section has been discarded, either because
2888 it is a copy of a linkonce section or due to
2889 linker script /DISCARD/, so we'll be discarding
2890 the relocs too. */
2891 }
2892 else if (hdh_p->count != 0)
2893 {
2894 srel = elf_section_data (hdh_p->sec)->sreloc;
2895 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2896 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2897 info->flags |= DF_TEXTREL;
2898 }
2899 }
2900 }
2901
2902 local_got = elf_local_got_refcounts (ibfd);
2903 if (!local_got)
2904 continue;
2905
2906 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2907 locsymcount = symtab_hdr->sh_info;
2908 end_local_got = local_got + locsymcount;
2909 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2910 s = htab->sgot;
2911 srel = htab->srelgot;
2912 for (; local_got < end_local_got; ++local_got)
2913 {
2914 if (*local_got > 0)
2915 {
2916 *local_got = s->size;
2917 s->size += GOT_ENTRY_SIZE;
2918 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2919 if (*local_tls_type == GOT_TLS_GD)
2920 s->size += 4;
2921 if (bfd_link_pic (info))
2922 srel->size += sizeof (Elf32_External_Rela);
2923 }
2924 else
2925 *local_got = (bfd_vma) -1;
2926 ++local_tls_type;
2927 }
2928 }
2929
2930 if (htab->tls_ldm_got.refcount > 0)
2931 {
2932 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2933 reloc. */
2934 htab->tls_ldm_got.offset = htab->sgot->size;
2935 htab->sgot->size += 8;
2936 htab->srelgot->size += sizeof (Elf32_External_Rela);
2937 }
2938 else
2939 htab->tls_ldm_got.offset = -1;
2940
2941 /* Allocate global sym .plt and .got entries, and space for global
2942 sym dynamic relocs. */
2943 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2944
2945 /* We now have determined the sizes of the various dynamic sections.
2946 Allocate memory for them. */
2947 relocs = FALSE;
2948 for (s = dynobj->sections; s != NULL; s = s->next)
2949 {
2950 bfd_boolean reloc_section = FALSE;
2951
2952 if ((s->flags & SEC_LINKER_CREATED) == 0)
2953 continue;
2954
2955 if (s == htab->splt
2956 || s == htab->sgot
2957 || s == htab->sgotplt
2958 || s == htab->sdynbss)
2959 {
2960 /* Strip this section if we don't need it; see the
2961 comment below. */
2962 }
2963 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2964 {
2965 if (s->size != 0 && s != htab->srelplt)
2966 relocs = TRUE;
2967
2968 /* We use the reloc_count field as a counter if we need
2969 to copy relocs into the output file. */
2970 s->reloc_count = 0;
2971 reloc_section = TRUE;
2972 }
2973 else
2974 {
2975 /* It's not one of our sections, so don't allocate space. */
2976 continue;
2977 }
2978
2979 if (s->size == 0)
2980 {
2981 /* If we don't need this section, strip it from the
2982 output file. This is mostly to handle .rela.bss and
2983 .rela.plt. We must create both sections in
2984 create_dynamic_sections, because they must be created
2985 before the linker maps input sections to output
2986 sections. The linker does that before
2987 adjust_dynamic_symbol is called, and it is that
2988 function which decides whether anything needs to go
2989 into these sections. */
2990 s->flags |= SEC_EXCLUDE;
2991 continue;
2992 }
2993
2994 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2995 continue;
2996
2997 /* Allocate memory for the section contents. */
2998 s->contents = bfd_zalloc (dynobj, s->size);
2999 if (s->contents == NULL)
3000 return FALSE;
3001 else if (reloc_section)
3002 {
3003 unsigned char *contents = s->contents;
3004 Elf32_External_Rela reloc;
3005
3006 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3007 memset(&reloc, 0, sizeof(Elf32_External_Rela));
3008 reloc.r_info[0] = R_METAG_NONE;
3009 for (; contents < (s->contents + s->size);
3010 contents += sizeof(Elf32_External_Rela))
3011 {
3012 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3013 }
3014 }
3015 }
3016
3017 if (htab->etab.dynamic_sections_created)
3018 {
3019 /* Add some entries to the .dynamic section. We fill in the
3020 values later, in elf_metag_finish_dynamic_sections, but we
3021 must add the entries now so that we get the correct size for
3022 the .dynamic section. The DT_DEBUG entry is filled in by the
3023 dynamic linker and used by the debugger. */
3024 #define add_dynamic_entry(TAG, VAL) \
3025 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3026
3027 if (!add_dynamic_entry (DT_PLTGOT, 0))
3028 return FALSE;
3029
3030 if (bfd_link_executable (info))
3031 {
3032 if (!add_dynamic_entry (DT_DEBUG, 0))
3033 return FALSE;
3034 }
3035
3036 if (htab->srelplt->size != 0)
3037 {
3038 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3039 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3040 || !add_dynamic_entry (DT_JMPREL, 0))
3041 return FALSE;
3042 }
3043
3044 if (relocs)
3045 {
3046 if (!add_dynamic_entry (DT_RELA, 0)
3047 || !add_dynamic_entry (DT_RELASZ, 0)
3048 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3049 return FALSE;
3050
3051 /* If any dynamic relocs apply to a read-only section,
3052 then we need a DT_TEXTREL entry. */
3053 if ((info->flags & DF_TEXTREL) == 0)
3054 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3055
3056 if ((info->flags & DF_TEXTREL) != 0)
3057 {
3058 if (!add_dynamic_entry (DT_TEXTREL, 0))
3059 return FALSE;
3060 }
3061 }
3062 }
3063 #undef add_dynamic_entry
3064
3065 return TRUE;
3066 }
3067
3068 /* Finish up dynamic symbol handling. We set the contents of various
3069 dynamic sections here. */
3070
3071 static bfd_boolean
3072 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3073 struct bfd_link_info *info,
3074 struct elf_link_hash_entry *eh,
3075 Elf_Internal_Sym *sym)
3076 {
3077 struct elf_metag_link_hash_table *htab;
3078 Elf_Internal_Rela rel;
3079 bfd_byte *loc;
3080
3081 htab = metag_link_hash_table (info);
3082
3083 if (eh->plt.offset != (bfd_vma) -1)
3084 {
3085 asection *splt;
3086 asection *sgot;
3087 asection *srela;
3088
3089 bfd_vma plt_index;
3090 bfd_vma got_offset;
3091 bfd_vma got_entry;
3092
3093 if (eh->plt.offset & 1)
3094 abort ();
3095
3096 BFD_ASSERT (eh->dynindx != -1);
3097
3098 splt = htab->splt;
3099 sgot = htab->sgotplt;
3100 srela = htab->srelplt;
3101 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3102
3103 /* Get the index in the procedure linkage table which
3104 corresponds to this symbol. This is the index of this symbol
3105 in all the symbols for which we are making plt entries. The
3106 first entry in the procedure linkage table is reserved. */
3107 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3108
3109 /* Get the offset into the .got.plt table of the entry that
3110 corresponds to this function. */
3111 got_offset = plt_index * GOT_ENTRY_SIZE;
3112
3113 BFD_ASSERT (got_offset < (1 << 16));
3114
3115 got_entry = sgot->output_section->vma
3116 + sgot->output_offset
3117 + got_offset;
3118
3119 BFD_ASSERT (plt_index < (1 << 16));
3120
3121 /* Fill in the entry in the procedure linkage table. */
3122 if (! bfd_link_pic (info))
3123 {
3124 bfd_put_32 (output_bfd,
3125 (plt_entry[0]
3126 | (((got_entry >> 16) & 0xffff) << 3)),
3127 splt->contents + eh->plt.offset);
3128 bfd_put_32 (output_bfd,
3129 (plt_entry[1]
3130 | ((got_entry & 0xffff) << 3)),
3131 splt->contents + eh->plt.offset + 4);
3132 bfd_put_32 (output_bfd, plt_entry[2],
3133 splt->contents + eh->plt.offset + 8);
3134 bfd_put_32 (output_bfd,
3135 (plt_entry[3] | (plt_index << 3)),
3136 splt->contents + eh->plt.offset + 12);
3137 bfd_put_32 (output_bfd,
3138 (plt_entry[4]
3139 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3140 splt->contents + eh->plt.offset + 16);
3141 }
3142 else
3143 {
3144 bfd_vma addr = got_entry - (splt->output_section->vma +
3145 splt->output_offset + eh->plt.offset);
3146
3147 bfd_put_32 (output_bfd,
3148 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3149 splt->contents + eh->plt.offset);
3150 bfd_put_32 (output_bfd,
3151 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3152 splt->contents + eh->plt.offset + 4);
3153 bfd_put_32 (output_bfd, plt_pic_entry[2],
3154 splt->contents + eh->plt.offset + 8);
3155 bfd_put_32 (output_bfd,
3156 (plt_pic_entry[3] | (plt_index << 3)),
3157 splt->contents + eh->plt.offset + 12);
3158 bfd_put_32 (output_bfd,
3159 (plt_pic_entry[4]
3160 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3161 splt->contents + eh->plt.offset + 16);
3162 }
3163
3164 /* Fill in the entry in the global offset table. */
3165 bfd_put_32 (output_bfd,
3166 (splt->output_section->vma
3167 + splt->output_offset
3168 + eh->plt.offset
3169 + 12), /* offset within PLT entry */
3170 sgot->contents + got_offset);
3171
3172 /* Fill in the entry in the .rela.plt section. */
3173 rel.r_offset = (sgot->output_section->vma
3174 + sgot->output_offset
3175 + got_offset);
3176 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3177 rel.r_addend = 0;
3178 loc = htab->srelplt->contents;
3179 loc += plt_index * sizeof(Elf32_External_Rela);
3180 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3181
3182 if (!eh->def_regular)
3183 {
3184 /* Mark the symbol as undefined, rather than as defined in
3185 the .plt section. Leave the value alone. */
3186 sym->st_shndx = SHN_UNDEF;
3187 }
3188 }
3189
3190 if (eh->got.offset != (bfd_vma) -1
3191 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3192 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3193 {
3194 /* This symbol has an entry in the global offset table. Set it
3195 up. */
3196
3197 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3198 + htab->sgot->output_offset
3199 + htab->sgot->output_section->vma);
3200
3201 /* If this is a -Bsymbolic link and the symbol is defined
3202 locally or was forced to be local because of a version file,
3203 we just want to emit a RELATIVE reloc. The entry in the
3204 global offset table will already have been initialized in the
3205 relocate_section function. */
3206 if (bfd_link_pic (info)
3207 && (info->symbolic || eh->dynindx == -1)
3208 && eh->def_regular)
3209 {
3210 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3211 rel.r_addend = (eh->root.u.def.value
3212 + eh->root.u.def.section->output_offset
3213 + eh->root.u.def.section->output_section->vma);
3214 }
3215 else
3216 {
3217 if ((eh->got.offset & 1) != 0)
3218 abort ();
3219 bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset);
3220 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3221 rel.r_addend = 0;
3222 }
3223
3224 loc = htab->srelgot->contents;
3225 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3226 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3227 }
3228
3229 if (eh->needs_copy)
3230 {
3231 asection *s;
3232
3233 /* This symbol needs a copy reloc. Set it up. */
3234
3235 if (! (eh->dynindx != -1
3236 && (eh->root.type == bfd_link_hash_defined
3237 || eh->root.type == bfd_link_hash_defweak)))
3238 abort ();
3239
3240 s = htab->srelbss;
3241
3242 rel.r_offset = (eh->root.u.def.value
3243 + eh->root.u.def.section->output_offset
3244 + eh->root.u.def.section->output_section->vma);
3245 rel.r_addend = 0;
3246 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3247 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3248 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3249 }
3250
3251 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3252 if (eh->root.root.string[0] == '_'
3253 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3254 || eh == htab->etab.hgot))
3255 {
3256 sym->st_shndx = SHN_ABS;
3257 }
3258
3259 return TRUE;
3260 }
3261
3262 /* Set the Meta ELF ABI version. */
3263
3264 static void
3265 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
3266 {
3267 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3268
3269 _bfd_elf_post_process_headers (abfd, link_info);
3270 i_ehdrp = elf_elfheader (abfd);
3271 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3272 }
3273
3274 /* Used to decide how to sort relocs in an optimal manner for the
3275 dynamic linker, before writing them out. */
3276
3277 static enum elf_reloc_type_class
3278 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3279 const asection *rel_sec ATTRIBUTE_UNUSED,
3280 const Elf_Internal_Rela *rela)
3281 {
3282 switch ((int) ELF32_R_TYPE (rela->r_info))
3283 {
3284 case R_METAG_RELATIVE:
3285 return reloc_class_relative;
3286 case R_METAG_JMP_SLOT:
3287 return reloc_class_plt;
3288 case R_METAG_COPY:
3289 return reloc_class_copy;
3290 default:
3291 return reloc_class_normal;
3292 }
3293 }
3294
3295 /* Finish up the dynamic sections. */
3296
3297 static bfd_boolean
3298 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3299 struct bfd_link_info *info)
3300 {
3301 bfd *dynobj;
3302 struct elf_metag_link_hash_table *htab;
3303 asection *sdyn;
3304
3305 htab = metag_link_hash_table (info);
3306 dynobj = htab->etab.dynobj;
3307
3308 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3309
3310 if (htab->etab.dynamic_sections_created)
3311 {
3312 asection *splt;
3313 Elf32_External_Dyn *dyncon, *dynconend;
3314
3315 if (sdyn == NULL)
3316 abort ();
3317
3318 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3319 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3320 for (; dyncon < dynconend; dyncon++)
3321 {
3322 Elf_Internal_Dyn dyn;
3323 asection *s;
3324
3325 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3326
3327 switch (dyn.d_tag)
3328 {
3329 default:
3330 continue;
3331
3332 case DT_PLTGOT:
3333 s = htab->sgot->output_section;
3334 BFD_ASSERT (s != NULL);
3335 dyn.d_un.d_ptr = s->vma + htab->sgot->output_offset;
3336 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3337 break;
3338
3339 case DT_JMPREL:
3340 s = htab->srelplt->output_section;
3341 BFD_ASSERT (s != NULL);
3342 dyn.d_un.d_ptr = s->vma;
3343 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3344 break;
3345
3346 case DT_PLTRELSZ:
3347 s = htab->srelplt;
3348 dyn.d_un.d_val = s->size;
3349 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3350 break;
3351
3352 case DT_RELASZ:
3353 /* Don't count procedure linkage table relocs in the
3354 overall reloc count. */
3355 if (htab->srelplt) {
3356 s = htab->srelplt;
3357 dyn.d_un.d_val -= s->size;
3358 }
3359 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3360 break;
3361
3362 case DT_RELA:
3363 /* We may not be using the standard ELF linker script.
3364 If .rela.plt is the first .rela section, we adjust
3365 DT_RELA to not include it. */
3366 if (htab->srelplt) {
3367 s = htab->srelplt;
3368 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3369 dyn.d_un.d_ptr += s->size;
3370 }
3371 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3372 break;
3373 }
3374
3375 }
3376
3377 /* Fill in the first entry in the procedure linkage table. */
3378 splt = htab->splt;
3379 if (splt && splt->size > 0)
3380 {
3381 unsigned long addr;
3382 /* addr = .got + 4 */
3383 addr = htab->sgot->output_section->vma +
3384 htab->sgot->output_offset + 4;
3385 if (bfd_link_pic (info))
3386 {
3387 addr -= splt->output_section->vma + splt->output_offset;
3388 bfd_put_32 (output_bfd,
3389 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3390 splt->contents);
3391 bfd_put_32 (output_bfd,
3392 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3393 splt->contents + 4);
3394 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3395 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3396 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3397 }
3398 else
3399 {
3400 bfd_put_32 (output_bfd,
3401 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3402 splt->contents);
3403 bfd_put_32 (output_bfd,
3404 plt0_entry[1] | ((addr & 0xffff) << 3),
3405 splt->contents + 4);
3406 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3407 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3408 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3409 }
3410
3411 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3412 PLT_ENTRY_SIZE;
3413 }
3414 }
3415
3416 if (htab->sgot != NULL && htab->sgot->size != 0)
3417 {
3418 /* Fill in the first entry in the global offset table.
3419 We use it to point to our dynamic section, if we have one. */
3420 bfd_put_32 (output_bfd,
3421 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3422 htab->sgot->contents);
3423
3424 /* The second entry is reserved for use by the dynamic linker. */
3425 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3426
3427 /* Set .got entry size. */
3428 elf_section_data (htab->sgot->output_section)
3429 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3430 }
3431
3432 return TRUE;
3433 }
3434
3435 /* Return the section that should be marked against GC for a given
3436 relocation. */
3437
3438 static asection *
3439 elf_metag_gc_mark_hook (asection *sec,
3440 struct bfd_link_info *info,
3441 Elf_Internal_Rela *rela,
3442 struct elf_link_hash_entry *hh,
3443 Elf_Internal_Sym *sym)
3444 {
3445 if (hh != NULL)
3446 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3447 {
3448 case R_METAG_GNU_VTINHERIT:
3449 case R_METAG_GNU_VTENTRY:
3450 return NULL;
3451 }
3452
3453 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3454 }
3455
3456 /* Update the got and plt entry reference counts for the section being
3457 removed. */
3458
3459 static bfd_boolean
3460 elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3461 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3462 asection *sec ATTRIBUTE_UNUSED,
3463 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3464 {
3465 Elf_Internal_Shdr *symtab_hdr;
3466 struct elf_link_hash_entry **eh_syms;
3467 bfd_signed_vma *local_got_refcounts;
3468 bfd_signed_vma *local_plt_refcounts;
3469 const Elf_Internal_Rela *rel, *relend;
3470
3471 if (bfd_link_relocatable (info))
3472 return TRUE;
3473
3474 elf_section_data (sec)->local_dynrel = NULL;
3475
3476 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3477 eh_syms = elf_sym_hashes (abfd);
3478 local_got_refcounts = elf_local_got_refcounts (abfd);
3479 local_plt_refcounts = local_got_refcounts;
3480 if (local_plt_refcounts != NULL)
3481 local_plt_refcounts += symtab_hdr->sh_info;
3482
3483 relend = relocs + sec->reloc_count;
3484 for (rel = relocs; rel < relend; rel++)
3485 {
3486 unsigned long r_symndx;
3487 unsigned int r_type;
3488 struct elf_link_hash_entry *eh = NULL;
3489
3490 r_symndx = ELF32_R_SYM (rel->r_info);
3491 if (r_symndx >= symtab_hdr->sh_info)
3492 {
3493 struct elf_metag_link_hash_entry *hh;
3494 struct elf_metag_dyn_reloc_entry **hdh_pp;
3495 struct elf_metag_dyn_reloc_entry *hdh_p;
3496
3497 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3498 while (eh->root.type == bfd_link_hash_indirect
3499 || eh->root.type == bfd_link_hash_warning)
3500 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3501 hh = (struct elf_metag_link_hash_entry *) eh;
3502
3503 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3504 hdh_pp = &hdh_p->hdh_next)
3505 if (hdh_p->sec == sec)
3506 {
3507 /* Everything must go for SEC. */
3508 *hdh_pp = hdh_p->hdh_next;
3509 break;
3510 }
3511 }
3512
3513 r_type = ELF32_R_TYPE (rel->r_info);
3514 switch (r_type)
3515 {
3516 case R_METAG_TLS_LDM:
3517 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3518 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3519 break;
3520 case R_METAG_TLS_IE:
3521 case R_METAG_TLS_GD:
3522 case R_METAG_GETSET_GOT:
3523 if (eh != NULL)
3524 {
3525 if (eh->got.refcount > 0)
3526 eh->got.refcount -= 1;
3527 }
3528 else if (local_got_refcounts != NULL)
3529 {
3530 if (local_got_refcounts[r_symndx] > 0)
3531 local_got_refcounts[r_symndx] -= 1;
3532 }
3533 break;
3534
3535 case R_METAG_RELBRANCH_PLT:
3536 if (eh != NULL)
3537 {
3538 if (eh->plt.refcount > 0)
3539 eh->plt.refcount -= 1;
3540 }
3541 break;
3542
3543 case R_METAG_ADDR32:
3544 case R_METAG_HIADDR16:
3545 case R_METAG_LOADDR16:
3546 case R_METAG_GETSETOFF:
3547 case R_METAG_RELBRANCH:
3548 if (eh != NULL)
3549 {
3550 struct elf_metag_link_hash_entry *hh;
3551 struct elf_metag_dyn_reloc_entry **hdh_pp;
3552 struct elf_metag_dyn_reloc_entry *hdh_p;
3553
3554 if (!bfd_link_pic (info) && eh->plt.refcount > 0)
3555 eh->plt.refcount -= 1;
3556
3557 hh = (struct elf_metag_link_hash_entry *) eh;
3558
3559 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3560 hdh_pp = &hdh_p->hdh_next)
3561 if (hdh_p->sec == sec)
3562 {
3563 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3564 hdh_p->relative_count -= 1;
3565 hdh_p->count -= 1;
3566 if (hdh_p->count == 0)
3567 *hdh_pp = hdh_p->hdh_next;
3568 break;
3569 }
3570 }
3571 break;
3572
3573 default:
3574 break;
3575 }
3576 }
3577
3578 return TRUE;
3579 }
3580
3581 /* Determine the type of stub needed, if any, for a call. */
3582
3583 static enum elf_metag_stub_type
3584 metag_type_of_stub (asection *input_sec,
3585 const Elf_Internal_Rela *rel,
3586 struct elf_metag_link_hash_entry *hh,
3587 bfd_vma destination,
3588 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3589 {
3590 bfd_vma location;
3591 bfd_vma branch_offset;
3592 bfd_vma max_branch_offset;
3593
3594 if (hh != NULL &&
3595 !(hh->eh.root.type == bfd_link_hash_defined
3596 || hh->eh.root.type == bfd_link_hash_defweak))
3597 return metag_stub_none;
3598
3599 /* Determine where the call point is. */
3600 location = (input_sec->output_offset
3601 + input_sec->output_section->vma
3602 + rel->r_offset);
3603
3604 branch_offset = destination - location;
3605
3606 /* Determine if a long branch stub is needed. Meta branch offsets
3607 are signed 19 bits 4 byte aligned. */
3608 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3609
3610 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3611 {
3612 if (bfd_link_pic (info))
3613 return metag_stub_long_branch_shared;
3614 else
3615 return metag_stub_long_branch;
3616 }
3617
3618 return metag_stub_none;
3619 }
3620
3621 #define MOVT_A0_3 0x82180005
3622 #define JUMP_A0_3 0xac180003
3623
3624 #define MOVT_A1LBP 0x83080005
3625 #define ADD_A1LBP 0x83080000
3626
3627 #define ADDT_A0_3_CPC 0x82980001
3628 #define ADD_A0_3_A0_3 0x82180000
3629 #define MOV_PC_A0_3 0xa3180ca0
3630
3631 static bfd_boolean
3632 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3633 {
3634 struct elf_metag_stub_hash_entry *hsh;
3635 asection *stub_sec;
3636 bfd *stub_bfd;
3637 bfd_byte *loc;
3638 bfd_vma sym_value;
3639 int size;
3640
3641 /* Massage our args to the form they really have. */
3642 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3643
3644 stub_sec = hsh->stub_sec;
3645
3646 /* Make a note of the offset within the stubs for this entry. */
3647 hsh->stub_offset = stub_sec->size;
3648 loc = stub_sec->contents + hsh->stub_offset;
3649
3650 stub_bfd = stub_sec->owner;
3651
3652 switch (hsh->stub_type)
3653 {
3654 case metag_stub_long_branch_shared:
3655 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3656 calculate the jump target using A0.3 as a temporary. Then a MOV
3657 to PC carries out the jump. */
3658 sym_value = (hsh->target_value
3659 + hsh->target_section->output_offset
3660 + hsh->target_section->output_section->vma
3661 + hsh->addend);
3662
3663 sym_value -= (hsh->stub_offset
3664 + stub_sec->output_offset
3665 + stub_sec->output_section->vma);
3666
3667 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3668 loc);
3669
3670 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3671 loc + 4);
3672
3673 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3674
3675 size = 12;
3676 break;
3677 case metag_stub_long_branch:
3678 /* A standard long branch stub is a MOVT instruction followed by a
3679 JUMP instruction using the A0.3 register as a temporary. This is
3680 the same method used by the LDLK linker (patch.c). */
3681 sym_value = (hsh->target_value
3682 + hsh->target_section->output_offset
3683 + hsh->target_section->output_section->vma
3684 + hsh->addend);
3685
3686 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3687 loc);
3688
3689 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3690
3691 size = 8;
3692 break;
3693 default:
3694 BFD_FAIL ();
3695 return FALSE;
3696 }
3697
3698 stub_sec->size += size;
3699 return TRUE;
3700 }
3701
3702 /* As above, but don't actually build the stub. Just bump offset so
3703 we know stub section sizes. */
3704
3705 static bfd_boolean
3706 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3707 {
3708 struct elf_metag_stub_hash_entry *hsh;
3709 int size = 0;
3710
3711 /* Massage our args to the form they really have. */
3712 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3713
3714 if (hsh->stub_type == metag_stub_long_branch)
3715 size = 8;
3716 else if (hsh->stub_type == metag_stub_long_branch_shared)
3717 size = 12;
3718
3719 hsh->stub_sec->size += size;
3720 return TRUE;
3721 }
3722
3723 /* Set up various things so that we can make a list of input sections
3724 for each output section included in the link. Returns -1 on error,
3725 0 when no stubs will be needed, and 1 on success. */
3726
3727 int
3728 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3729 {
3730 bfd *input_bfd;
3731 unsigned int bfd_count;
3732 unsigned int top_id, top_index;
3733 asection *section;
3734 asection **input_list, **list;
3735 bfd_size_type amt;
3736 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3737
3738 /* Count the number of input BFDs and find the top input section id. */
3739 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3740 input_bfd != NULL;
3741 input_bfd = input_bfd->link.next)
3742 {
3743 bfd_count += 1;
3744 for (section = input_bfd->sections;
3745 section != NULL;
3746 section = section->next)
3747 {
3748 if (top_id < section->id)
3749 top_id = section->id;
3750 }
3751 }
3752
3753 htab->bfd_count = bfd_count;
3754
3755 amt = sizeof (struct map_stub) * (top_id + 1);
3756 htab->stub_group = bfd_zmalloc (amt);
3757 if (htab->stub_group == NULL)
3758 return -1;
3759
3760 /* We can't use output_bfd->section_count here to find the top output
3761 section index as some sections may have been removed, and
3762 strip_excluded_output_sections doesn't renumber the indices. */
3763 for (section = output_bfd->sections, top_index = 0;
3764 section != NULL;
3765 section = section->next)
3766 {
3767 if (top_index < section->index)
3768 top_index = section->index;
3769 }
3770
3771 htab->top_index = top_index;
3772 amt = sizeof (asection *) * (top_index + 1);
3773 input_list = bfd_malloc (amt);
3774 htab->input_list = input_list;
3775 if (input_list == NULL)
3776 return -1;
3777
3778 /* For sections we aren't interested in, mark their entries with a
3779 value we can check later. */
3780 list = input_list + top_index;
3781 do
3782 *list = bfd_abs_section_ptr;
3783 while (list-- != input_list);
3784
3785 for (section = output_bfd->sections;
3786 section != NULL;
3787 section = section->next)
3788 {
3789 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3790 * have PC relative relocs in them but no code flag set. */
3791 if (((section->flags & SEC_CODE) != 0) ||
3792 strcmp(".ctors", section->name) ||
3793 strcmp(".dtors", section->name))
3794 input_list[section->index] = NULL;
3795 }
3796
3797 return 1;
3798 }
3799
3800 /* The linker repeatedly calls this function for each input section,
3801 in the order that input sections are linked into output sections.
3802 Build lists of input sections to determine groupings between which
3803 we may insert linker stubs. */
3804
3805 void
3806 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3807 {
3808 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3809
3810 if (isec->output_section->index <= htab->top_index)
3811 {
3812 asection **list = htab->input_list + isec->output_section->index;
3813 if (*list != bfd_abs_section_ptr)
3814 {
3815 /* Steal the link_sec pointer for our list. */
3816 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3817 /* This happens to make the list in reverse order,
3818 which is what we want. */
3819 PREV_SEC (isec) = *list;
3820 *list = isec;
3821 }
3822 }
3823 }
3824
3825 /* See whether we can group stub sections together. Grouping stub
3826 sections may result in fewer stubs. More importantly, we need to
3827 put all .init* and .fini* stubs at the beginning of the .init or
3828 .fini output sections respectively, because glibc splits the
3829 _init and _fini functions into multiple parts. Putting a stub in
3830 the middle of a function is not a good idea. */
3831
3832 static void
3833 group_sections (struct elf_metag_link_hash_table *htab,
3834 bfd_size_type stub_group_size,
3835 bfd_boolean stubs_always_before_branch)
3836 {
3837 asection **list = htab->input_list + htab->top_index;
3838 do
3839 {
3840 asection *tail = *list;
3841 if (tail == bfd_abs_section_ptr)
3842 continue;
3843 while (tail != NULL)
3844 {
3845 asection *curr;
3846 asection *prev;
3847 bfd_size_type total;
3848 bfd_boolean big_sec;
3849
3850 curr = tail;
3851 total = tail->size;
3852 big_sec = total >= stub_group_size;
3853
3854 while ((prev = PREV_SEC (curr)) != NULL
3855 && ((total += curr->output_offset - prev->output_offset)
3856 < stub_group_size))
3857 curr = prev;
3858
3859 /* OK, the size from the start of CURR to the end is less
3860 than stub_group_size bytes and thus can be handled by one stub
3861 section. (or the tail section is itself larger than
3862 stub_group_size bytes, in which case we may be toast.)
3863 We should really be keeping track of the total size of
3864 stubs added here, as stubs contribute to the final output
3865 section size. */
3866 do
3867 {
3868 prev = PREV_SEC (tail);
3869 /* Set up this stub group. */
3870 htab->stub_group[tail->id].link_sec = curr;
3871 }
3872 while (tail != curr && (tail = prev) != NULL);
3873
3874 /* But wait, there's more! Input sections up to stub_group_size
3875 bytes before the stub section can be handled by it too.
3876 Don't do this if we have a really large section after the
3877 stubs, as adding more stubs increases the chance that
3878 branches may not reach into the stub section. */
3879 if (!stubs_always_before_branch && !big_sec)
3880 {
3881 total = 0;
3882 while (prev != NULL
3883 && ((total += tail->output_offset - prev->output_offset)
3884 < stub_group_size))
3885 {
3886 tail = prev;
3887 prev = PREV_SEC (tail);
3888 htab->stub_group[tail->id].link_sec = curr;
3889 }
3890 }
3891 tail = prev;
3892 }
3893 }
3894 while (list-- != htab->input_list);
3895 free (htab->input_list);
3896 #undef PREV_SEC
3897 }
3898
3899 /* Read in all local syms for all input bfds.
3900 Returns -1 on error, 0 otherwise. */
3901
3902 static int
3903 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3904 struct bfd_link_info *info)
3905 {
3906 unsigned int bfd_indx;
3907 Elf_Internal_Sym *local_syms, **all_local_syms;
3908 int stub_changed = 0;
3909 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3910
3911 /* We want to read in symbol extension records only once. To do this
3912 we need to read in the local symbols in parallel and save them for
3913 later use; so hold pointers to the local symbols in an array. */
3914 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3915 all_local_syms = bfd_zmalloc (amt);
3916 htab->all_local_syms = all_local_syms;
3917 if (all_local_syms == NULL)
3918 return -1;
3919
3920 /* Walk over all the input BFDs, swapping in local symbols. */
3921 for (bfd_indx = 0;
3922 input_bfd != NULL;
3923 input_bfd = input_bfd->link.next, bfd_indx++)
3924 {
3925 Elf_Internal_Shdr *symtab_hdr;
3926
3927 /* We'll need the symbol table in a second. */
3928 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3929 if (symtab_hdr->sh_info == 0)
3930 continue;
3931
3932 /* We need an array of the local symbols attached to the input bfd. */
3933 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3934 if (local_syms == NULL)
3935 {
3936 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3937 symtab_hdr->sh_info, 0,
3938 NULL, NULL, NULL);
3939 /* Cache them for elf_link_input_bfd. */
3940 symtab_hdr->contents = (unsigned char *) local_syms;
3941 }
3942 if (local_syms == NULL)
3943 return -1;
3944
3945 all_local_syms[bfd_indx] = local_syms;
3946 }
3947
3948 return stub_changed;
3949 }
3950
3951 /* Determine and set the size of the stub section for a final link.
3952
3953 The basic idea here is to examine all the relocations looking for
3954 PC-relative calls to a target that is unreachable with a "CALLR"
3955 instruction. */
3956
3957 /* See elf32-hppa.c and elf64-ppc.c. */
3958
3959 bfd_boolean
3960 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3961 struct bfd_link_info *info,
3962 bfd_signed_vma group_size,
3963 asection * (*add_stub_section) (const char *, asection *),
3964 void (*layout_sections_again) (void))
3965 {
3966 bfd_size_type stub_group_size;
3967 bfd_boolean stubs_always_before_branch;
3968 bfd_boolean stub_changed;
3969 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3970
3971 /* Stash our params away. */
3972 htab->stub_bfd = stub_bfd;
3973 htab->add_stub_section = add_stub_section;
3974 htab->layout_sections_again = layout_sections_again;
3975 stubs_always_before_branch = group_size < 0;
3976 if (group_size < 0)
3977 stub_group_size = -group_size;
3978 else
3979 stub_group_size = group_size;
3980 if (stub_group_size == 1)
3981 {
3982 /* Default values. */
3983 /* FIXME: not sure what these values should be */
3984 if (stubs_always_before_branch)
3985 {
3986 stub_group_size = (1 << BRANCH_BITS);
3987 }
3988 else
3989 {
3990 stub_group_size = (1 << BRANCH_BITS);
3991 }
3992 }
3993
3994 group_sections (htab, stub_group_size, stubs_always_before_branch);
3995
3996 switch (get_local_syms (output_bfd, info->input_bfds, info))
3997 {
3998 default:
3999 if (htab->all_local_syms)
4000 goto error_ret_free_local;
4001 return FALSE;
4002
4003 case 0:
4004 stub_changed = FALSE;
4005 break;
4006
4007 case 1:
4008 stub_changed = TRUE;
4009 break;
4010 }
4011
4012 while (1)
4013 {
4014 bfd *input_bfd;
4015 unsigned int bfd_indx;
4016 asection *stub_sec;
4017
4018 for (input_bfd = info->input_bfds, bfd_indx = 0;
4019 input_bfd != NULL;
4020 input_bfd = input_bfd->link.next, bfd_indx++)
4021 {
4022 Elf_Internal_Shdr *symtab_hdr;
4023 asection *section;
4024 Elf_Internal_Sym *local_syms;
4025
4026 /* We'll need the symbol table in a second. */
4027 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4028 if (symtab_hdr->sh_info == 0)
4029 continue;
4030
4031 local_syms = htab->all_local_syms[bfd_indx];
4032
4033 /* Walk over each section attached to the input bfd. */
4034 for (section = input_bfd->sections;
4035 section != NULL;
4036 section = section->next)
4037 {
4038 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4039
4040 /* If there aren't any relocs, then there's nothing more
4041 to do. */
4042 if ((section->flags & SEC_RELOC) == 0
4043 || section->reloc_count == 0)
4044 continue;
4045
4046 /* If this section is a link-once section that will be
4047 discarded, then don't create any stubs. */
4048 if (section->output_section == NULL
4049 || section->output_section->owner != output_bfd)
4050 continue;
4051
4052 /* Get the relocs. */
4053 internal_relocs
4054 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4055 info->keep_memory);
4056 if (internal_relocs == NULL)
4057 goto error_ret_free_local;
4058
4059 /* Now examine each relocation. */
4060 irela = internal_relocs;
4061 irelaend = irela + section->reloc_count;
4062 for (; irela < irelaend; irela++)
4063 {
4064 unsigned int r_type, r_indx;
4065 enum elf_metag_stub_type stub_type;
4066 struct elf_metag_stub_hash_entry *hsh;
4067 asection *sym_sec;
4068 bfd_vma sym_value;
4069 bfd_vma destination;
4070 struct elf_metag_link_hash_entry *hh;
4071 char *stub_name;
4072 const asection *id_sec;
4073
4074 r_type = ELF32_R_TYPE (irela->r_info);
4075 r_indx = ELF32_R_SYM (irela->r_info);
4076
4077 if (r_type >= (unsigned int) R_METAG_MAX)
4078 {
4079 bfd_set_error (bfd_error_bad_value);
4080 error_ret_free_internal:
4081 if (elf_section_data (section)->relocs == NULL)
4082 free (internal_relocs);
4083 goto error_ret_free_local;
4084 }
4085
4086 /* Only look for stubs on CALLR and B instructions. */
4087 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4088 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4089 continue;
4090
4091 /* Now determine the call target, its name, value,
4092 section. */
4093 sym_sec = NULL;
4094 sym_value = 0;
4095 destination = 0;
4096 hh = NULL;
4097 if (r_indx < symtab_hdr->sh_info)
4098 {
4099 /* It's a local symbol. */
4100 Elf_Internal_Sym *sym;
4101 Elf_Internal_Shdr *hdr;
4102 unsigned int shndx;
4103
4104 sym = local_syms + r_indx;
4105 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4106 sym_value = sym->st_value;
4107 shndx = sym->st_shndx;
4108 if (shndx < elf_numsections (input_bfd))
4109 {
4110 hdr = elf_elfsections (input_bfd)[shndx];
4111 sym_sec = hdr->bfd_section;
4112 destination = (sym_value + irela->r_addend
4113 + sym_sec->output_offset
4114 + sym_sec->output_section->vma);
4115 }
4116 }
4117 else
4118 {
4119 /* It's an external symbol. */
4120 int e_indx;
4121
4122 e_indx = r_indx - symtab_hdr->sh_info;
4123 hh = ((struct elf_metag_link_hash_entry *)
4124 elf_sym_hashes (input_bfd)[e_indx]);
4125
4126 while (hh->eh.root.type == bfd_link_hash_indirect
4127 || hh->eh.root.type == bfd_link_hash_warning)
4128 hh = ((struct elf_metag_link_hash_entry *)
4129 hh->eh.root.u.i.link);
4130
4131 if (hh->eh.root.type == bfd_link_hash_defined
4132 || hh->eh.root.type == bfd_link_hash_defweak)
4133 {
4134 sym_sec = hh->eh.root.u.def.section;
4135 sym_value = hh->eh.root.u.def.value;
4136 if (hh->eh.plt.offset != (bfd_vma) -1
4137 && hh->eh.dynindx != -1
4138 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4139 {
4140 sym_sec = htab->splt;
4141 sym_value = hh->eh.plt.offset;
4142 }
4143
4144 if (sym_sec->output_section != NULL)
4145 destination = (sym_value + irela->r_addend
4146 + sym_sec->output_offset
4147 + sym_sec->output_section->vma);
4148 else
4149 continue;
4150 }
4151 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4152 {
4153 if (! bfd_link_pic (info))
4154 continue;
4155 }
4156 else if (hh->eh.root.type == bfd_link_hash_undefined)
4157 {
4158 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4159 && (ELF_ST_VISIBILITY (hh->eh.other)
4160 == STV_DEFAULT)))
4161 continue;
4162 }
4163 else
4164 {
4165 bfd_set_error (bfd_error_bad_value);
4166 goto error_ret_free_internal;
4167 }
4168 }
4169
4170 /* Determine what (if any) linker stub is needed. */
4171 stub_type = metag_type_of_stub (section, irela, hh,
4172 destination, info);
4173 if (stub_type == metag_stub_none)
4174 continue;
4175
4176 /* Support for grouping stub sections. */
4177 id_sec = htab->stub_group[section->id].link_sec;
4178
4179 /* Get the name of this stub. */
4180 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4181 if (!stub_name)
4182 goto error_ret_free_internal;
4183
4184 hsh = metag_stub_hash_lookup (&htab->bstab,
4185 stub_name,
4186 FALSE, FALSE);
4187 if (hsh != NULL)
4188 {
4189 /* The proper stub has already been created. */
4190 free (stub_name);
4191 continue;
4192 }
4193
4194 hsh = metag_add_stub (stub_name, section, htab);
4195 if (hsh == NULL)
4196 {
4197 free (stub_name);
4198 goto error_ret_free_internal;
4199 }
4200 hsh->target_value = sym_value;
4201 hsh->target_section = sym_sec;
4202 hsh->stub_type = stub_type;
4203 hsh->hh = hh;
4204 hsh->addend = irela->r_addend;
4205 stub_changed = TRUE;
4206 }
4207
4208 /* We're done with the internal relocs, free them. */
4209 if (elf_section_data (section)->relocs == NULL)
4210 free (internal_relocs);
4211 }
4212 }
4213
4214 if (!stub_changed)
4215 break;
4216
4217 /* OK, we've added some stubs. Find out the new size of the
4218 stub sections. */
4219 for (stub_sec = htab->stub_bfd->sections;
4220 stub_sec != NULL;
4221 stub_sec = stub_sec->next)
4222 stub_sec->size = 0;
4223
4224 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4225
4226 /* Ask the linker to do its stuff. */
4227 (*htab->layout_sections_again) ();
4228 stub_changed = FALSE;
4229 }
4230
4231 free (htab->all_local_syms);
4232 return TRUE;
4233
4234 error_ret_free_local:
4235 free (htab->all_local_syms);
4236 return FALSE;
4237 }
4238
4239 /* Build all the stubs associated with the current output file. The
4240 stubs are kept in a hash table attached to the main linker hash
4241 table. This function is called via metagelf_finish in the linker. */
4242
4243 bfd_boolean
4244 elf_metag_build_stubs (struct bfd_link_info *info)
4245 {
4246 asection *stub_sec;
4247 struct bfd_hash_table *table;
4248 struct elf_metag_link_hash_table *htab;
4249
4250 htab = metag_link_hash_table (info);
4251
4252 for (stub_sec = htab->stub_bfd->sections;
4253 stub_sec != NULL;
4254 stub_sec = stub_sec->next)
4255 {
4256 bfd_size_type size;
4257
4258 /* Allocate memory to hold the linker stubs. */
4259 size = stub_sec->size;
4260 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4261 if (stub_sec->contents == NULL && size != 0)
4262 return FALSE;
4263 stub_sec->size = 0;
4264 }
4265
4266 /* Build the stubs as directed by the stub hash table. */
4267 table = &htab->bstab;
4268 bfd_hash_traverse (table, metag_build_one_stub, info);
4269
4270 return TRUE;
4271 }
4272
4273 /* Return TRUE if SYM represents a local label symbol. */
4274
4275 static bfd_boolean
4276 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4277 {
4278 if (name[0] == '$' && name[1] == 'L')
4279 return 1;
4280 return _bfd_elf_is_local_label_name (abfd, name);
4281 }
4282
4283 /* Return address for Ith PLT stub in section PLT, for relocation REL
4284 or (bfd_vma) -1 if it should not be included. */
4285
4286 static bfd_vma
4287 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4288 const arelent *rel ATTRIBUTE_UNUSED)
4289 {
4290 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4291 }
4292
4293 #define ELF_ARCH bfd_arch_metag
4294 #define ELF_TARGET_ID METAG_ELF_DATA
4295 #define ELF_MACHINE_CODE EM_METAG
4296 #define ELF_MINPAGESIZE 0x1000
4297 #define ELF_MAXPAGESIZE 0x4000
4298 #define ELF_COMMONPAGESIZE 0x1000
4299
4300 #define TARGET_LITTLE_SYM metag_elf32_vec
4301 #define TARGET_LITTLE_NAME "elf32-metag"
4302
4303 #define elf_symbol_leading_char '_'
4304
4305 #define elf_info_to_howto_rel NULL
4306 #define elf_info_to_howto metag_info_to_howto_rela
4307
4308 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4309 #define bfd_elf32_bfd_link_hash_table_create \
4310 elf_metag_link_hash_table_create
4311 #define elf_backend_relocate_section elf_metag_relocate_section
4312 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4313 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4314 #define elf_backend_check_relocs elf_metag_check_relocs
4315 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4316 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4317 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4318 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4319 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4320 #define elf_backend_omit_section_dynsym \
4321 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4322 #define elf_backend_post_process_headers elf_metag_post_process_headers
4323 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4324 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4325 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4326
4327 #define elf_backend_can_gc_sections 1
4328 #define elf_backend_can_refcount 1
4329 #define elf_backend_got_header_size 12
4330 #define elf_backend_rela_normal 1
4331 #define elf_backend_want_got_sym 0
4332 #define elf_backend_want_plt_sym 0
4333 #define elf_backend_plt_readonly 1
4334
4335 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4336 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4337
4338 #include "elf32-target.h"
GDB Binutils - Deliverables
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