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Mach-O: add objdump -P function_starts to display function starts.
[binutils-gdb.git] / bfd / elf32-metag.c
blobe9c529013b708e197c364df757d0378ffba96877
1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2014 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
28
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
31
32 /* ABI version:
33 0 - original
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
36
37 static const unsigned int plt0_entry[] =
38 {
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
43 0xa0fffffe /* NOP */
44 };
45
46 static const unsigned int plt0_pic_entry[] =
47 {
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
53 };
54
55 static const unsigned int plt_entry[] =
56 {
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
62 };
63
64 static const unsigned int plt_pic_entry[] =
65 {
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
71 };
72
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
75
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
79
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
82
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
85
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
88
89 elf_metag_dyn_reloc_entry "hdh"
90
91 Always remember to use GNU Coding Style. */
92
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
94
95 static reloc_howto_type elf_metag_howto_table[] =
96 {
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16, /* type */
99 16, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 FALSE, /* pc_relative */
103 3, /* bitpos */
104 complain_overflow_dont, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x0007fff8, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 16, /* bitsize */
117 FALSE, /* pc_relative */
118 3, /* bitpos */
119 complain_overflow_dont,/* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0x0007fff8, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 32, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_bitfield, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* No relocation. */
143 HOWTO (R_METAG_NONE, /* type */
144 0, /* rightshift */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
146 0, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 19, /* bitsize */
162 TRUE, /* pc_relative */
163 5, /* bitpos */
164 complain_overflow_signed, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE, /* partial_inplace */
168 0, /* src_mask */
169 0x00ffffe0, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* GET/SET offset */
173 HOWTO (R_METAG_GETSETOFF, /* type */
174 0, /* rightshift */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
176 12, /* bitsize */
177 FALSE, /* pc_relative */
178 7, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 EMPTY_HOWTO (6),
188 EMPTY_HOWTO (7),
189 EMPTY_HOWTO (8),
190 EMPTY_HOWTO (9),
191 EMPTY_HOWTO (10),
192 EMPTY_HOWTO (11),
193 EMPTY_HOWTO (12),
194 EMPTY_HOWTO (13),
195 EMPTY_HOWTO (14),
196 EMPTY_HOWTO (15),
197 EMPTY_HOWTO (16),
198 EMPTY_HOWTO (17),
199 EMPTY_HOWTO (18),
200 EMPTY_HOWTO (19),
201 EMPTY_HOWTO (20),
202 EMPTY_HOWTO (21),
203 EMPTY_HOWTO (22),
204 EMPTY_HOWTO (23),
205 EMPTY_HOWTO (24),
206 EMPTY_HOWTO (25),
207 EMPTY_HOWTO (26),
208 EMPTY_HOWTO (27),
209 EMPTY_HOWTO (28),
210 EMPTY_HOWTO (29),
211
212 HOWTO (R_METAG_GNU_VTINHERIT, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 0, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_METAG_GNU_VTENTRY, /* type */
227 0, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 0, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF, /* type */
242 16, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 3, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0x0007fff8, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF, /* type */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 3, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0x0007fff8, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF, /* type */
272 0, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 12, /* bitsize */
275 FALSE, /* pc_relative */
276 7, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT, /* type */
287 0, /* rightshift */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
289 12, /* bitsize */
290 FALSE, /* pc_relative */
291 7, /* bitpos */
292 complain_overflow_dont, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE, /* partial_inplace */
296 0, /* src_mask */
297 0, /* dst_mask */
298 FALSE), /* pcrel_offset */
299
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC, /* type */
302 16, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 3, /* bitpos */
307 complain_overflow_dont, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0x0007fff8, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 3, /* bitpos */
322 complain_overflow_dont, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0007fff8, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT, /* type */
332 16, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 3, /* bitpos */
337 complain_overflow_dont, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0007fff8, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 3, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffffffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 HOWTO (R_METAG_RELBRANCH_PLT, /* type */
361 2, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 19, /* bitsize */
364 TRUE, /* pc_relative */
365 5, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x00ffffe0, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_METAG_PLT, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
439 addend. */
440 HOWTO (R_METAG_RELATIVE, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_METAG_GLOB_DAT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_METAG_TLS_GD, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 3, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0x0007fff8, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_METAG_TLS_LDM, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 3, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0x0007fff8, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_METAG_TLS_LDO_HI16, /* type */
497 16, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 3, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0x0007fff8, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_METAG_TLS_LDO_LO16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 3, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0x0007fff8, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 3, /* bitpos */
531 complain_overflow_bitfield, /* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0x0007fff8, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 HOWTO (R_METAG_TLS_IE, /* type */
540 2, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 FALSE, /* pc_relative */
544 7, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0x0007ff80, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 3, /* bitpos */
560 complain_overflow_dont, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0x0007fff8, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */
569 16, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 16, /* bitsize */
572 FALSE, /* pc_relative */
573 3, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0x0007fff8, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 16, /* bitsize */
586 FALSE, /* pc_relative */
587 3, /* bitpos */
588 complain_overflow_dont, /* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE, /* partial_inplace */
592 0, /* src_mask */
593 0x0007fff8, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_METAG_TLS_TPOFF, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_METAG_TLS_DTPMOD, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0xffffffff, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_METAG_TLS_DTPOFF, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_bitfield, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_bitfield, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE, /* partial_inplace */
649 0, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_METAG_TLS_LE_HI16, /* type */
654 16, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 3, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0x0007fff8, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_METAG_TLS_LE_LO16, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 3, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0x0007fff8, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 };
682
683 #define BRANCH_BITS 19
684
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
695
696 struct metag_reloc_map
697 {
698 bfd_reloc_code_real_type bfd_reloc_val;
699 unsigned int metag_reloc_val;
700 };
701
702 static const struct metag_reloc_map metag_reloc_map [] =
703 {
704 { BFD_RELOC_NONE, R_METAG_NONE },
705 { BFD_RELOC_32, R_METAG_ADDR32 },
706 { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 },
707 { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 },
708 { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH },
709 { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF },
710 { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT },
711 { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY },
712 { BFD_RELOC_METAG_REL8, R_METAG_REL8 },
713 { BFD_RELOC_METAG_REL16, R_METAG_REL16 },
714 { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF },
715 { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF },
716 { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF },
717 { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT },
718 { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC },
719 { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC },
720 { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT },
721 { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT },
722 { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT },
723 { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF },
724 { BFD_RELOC_METAG_PLT, R_METAG_PLT },
725 { BFD_RELOC_METAG_COPY, R_METAG_COPY },
726 { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT },
727 { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE },
728 { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT },
729 { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD },
730 { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM },
731 { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 },
732 { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 },
733 { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO },
734 { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE },
735 { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC },
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 },
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 },
738 { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF },
739 { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD },
740 { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF },
741 { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE },
742 { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 },
743 { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 },
744 };
745
746 enum elf_metag_stub_type
747 {
748 metag_stub_long_branch,
749 metag_stub_long_branch_shared,
750 metag_stub_none
751 };
752
753 struct elf_metag_stub_hash_entry
754 {
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root;
757
758 /* The stub section. */
759 asection *stub_sec;
760
761 /* Offset within stub_sec of the beginning of this stub. */
762 bfd_vma stub_offset;
763
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value;
767 asection *target_section;
768
769 enum elf_metag_stub_type stub_type;
770
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry *hh;
773
774 /* And the reloc addend that this was derived from. */
775 bfd_vma addend;
776
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
779 asection *id_sec;
780 };
781
782 struct elf_metag_link_hash_entry
783 {
784 struct elf_link_hash_entry eh;
785
786 /* A pointer to the most recently used stub hash entry against this
787 symbol. */
788 struct elf_metag_stub_hash_entry *hsh_cache;
789
790 /* Used to count relocations for delayed sizing of relocation
791 sections. */
792 struct elf_metag_dyn_reloc_entry {
793
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry *hdh_next;
796
797 /* The input section of the reloc. */
798 asection *sec;
799
800 /* Number of relocs copied in this section. */
801 bfd_size_type count;
802
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count;
805 } *dyn_relocs;
806
807 enum
808 {
809 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8
810 } tls_type;
811 };
812
813 struct elf_metag_link_hash_table
814 {
815 /* The main hash table. */
816 struct elf_link_hash_table etab;
817
818 /* The stub hash table. */
819 struct bfd_hash_table bstab;
820
821 /* Linker stub bfd. */
822 bfd *stub_bfd;
823
824 /* Linker call-backs. */
825 asection * (*add_stub_section) (const char *, asection *);
826 void (*layout_sections_again) (void);
827
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
830 struct map_stub
831 {
832 /* This is the section to which stubs in the group will be
833 attached. */
834 asection *link_sec;
835 /* The stub section. */
836 asection *stub_sec;
837 } *stub_group;
838
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count;
841 int top_index;
842 asection **input_list;
843 Elf_Internal_Sym **all_local_syms;
844
845 /* Short-cuts to get to dynamic linker sections. */
846 asection *sgot;
847 asection *sgotplt;
848 asection *srelgot;
849 asection *splt;
850 asection *srelplt;
851 asection *sdynbss;
852 asection *srelbss;
853
854 /* Small local sym cache. */
855 struct sym_cache sym_cache;
856
857 /* Data for LDM relocations. */
858 union
859 {
860 bfd_signed_vma refcount;
861 bfd_vma offset;
862 } tls_ldm_got;
863 };
864
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
867 segment p_vaddr. */
868 static bfd_vma
869 dtpoff_base (struct bfd_link_info *info)
870 {
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info)->tls_sec == NULL)
873 return 0;
874 return elf_hash_table (info)->tls_sec->vma;
875 }
876
877 /* Return the relocation value for R_METAG_TLS_IE */
878 static bfd_vma
879 tpoff (struct bfd_link_info *info, bfd_vma address)
880 {
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info)->tls_sec == NULL)
883 return 0;
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address - elf_hash_table (info)->tls_sec->vma
887 + align_power ((bfd_vma) 8,
888 elf_hash_table (info)->tls_sec->alignment_power));
889 }
890
891 static void
892 metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
893 arelent *cache_ptr,
894 Elf_Internal_Rela *dst)
895 {
896 unsigned int r_type;
897
898 r_type = ELF32_R_TYPE (dst->r_info);
899 BFD_ASSERT (r_type < (unsigned int) R_METAG_MAX);
900 cache_ptr->howto = & elf_metag_howto_table [r_type];
901 }
902
903 static reloc_howto_type *
904 metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
905 bfd_reloc_code_real_type code)
906 {
907 unsigned int i;
908
909 for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++)
910 if (metag_reloc_map [i].bfd_reloc_val == code)
911 return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val];
912
913 return NULL;
914 }
915
916 static reloc_howto_type *
917 metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
918 const char *r_name)
919 {
920 unsigned int i;
921
922 for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++)
923 if (elf_metag_howto_table[i].name != NULL
924 && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0)
925 return &elf_metag_howto_table[i];
926
927 return NULL;
928 }
929
930 /* Various hash macros and functions. */
931 #define metag_link_hash_table(p) \
932 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
933 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
934
935 #define metag_elf_hash_entry(ent) \
936 ((struct elf_metag_link_hash_entry *)(ent))
937
938 #define metag_stub_hash_entry(ent) \
939 ((struct elf_metag_stub_hash_entry *)(ent))
940
941 #define metag_stub_hash_lookup(table, string, create, copy) \
942 ((struct elf_metag_stub_hash_entry *) \
943 bfd_hash_lookup ((table), (string), (create), (copy)))
944
945 #define metag_elf_local_got_tls_type(abfd) \
946 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
947
948 /* Assorted hash table functions. */
949
950 /* Initialize an entry in the stub hash table. */
951
952 static struct bfd_hash_entry *
953 stub_hash_newfunc (struct bfd_hash_entry *entry,
954 struct bfd_hash_table *table,
955 const char *string)
956 {
957 /* Allocate the structure if it has not already been allocated by a
958 subclass. */
959 if (entry == NULL)
960 {
961 entry = bfd_hash_allocate (table,
962 sizeof (struct elf_metag_stub_hash_entry));
963 if (entry == NULL)
964 return entry;
965 }
966
967 /* Call the allocation method of the superclass. */
968 entry = bfd_hash_newfunc (entry, table, string);
969 if (entry != NULL)
970 {
971 struct elf_metag_stub_hash_entry *hsh;
972
973 /* Initialize the local fields. */
974 hsh = (struct elf_metag_stub_hash_entry *) entry;
975 hsh->stub_sec = NULL;
976 hsh->stub_offset = 0;
977 hsh->target_value = 0;
978 hsh->target_section = NULL;
979 hsh->stub_type = metag_stub_long_branch;
980 hsh->hh = NULL;
981 hsh->id_sec = NULL;
982 }
983
984 return entry;
985 }
986
987 /* Initialize an entry in the link hash table. */
988
989 static struct bfd_hash_entry *
990 metag_link_hash_newfunc (struct bfd_hash_entry *entry,
991 struct bfd_hash_table *table,
992 const char *string)
993 {
994 /* Allocate the structure if it has not already been allocated by a
995 subclass. */
996 if (entry == NULL)
997 {
998 entry = bfd_hash_allocate (table,
999 sizeof (struct elf_metag_link_hash_entry));
1000 if (entry == NULL)
1001 return entry;
1002 }
1003
1004 /* Call the allocation method of the superclass. */
1005 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1006 if (entry != NULL)
1007 {
1008 struct elf_metag_link_hash_entry *hh;
1009
1010 /* Initialize the local fields. */
1011 hh = (struct elf_metag_link_hash_entry *) entry;
1012 hh->hsh_cache = NULL;
1013 hh->dyn_relocs = NULL;
1014 hh->tls_type = GOT_UNKNOWN;
1015 }
1016
1017 return entry;
1018 }
1019
1020 /* Create the derived linker hash table. The Meta ELF port uses the derived
1021 hash table to keep information specific to the Meta ELF linker (without
1022 using static variables). */
1023
1024 static struct bfd_link_hash_table *
1025 elf_metag_link_hash_table_create (bfd *abfd)
1026 {
1027 struct elf_metag_link_hash_table *htab;
1028 bfd_size_type amt = sizeof (*htab);
1029
1030 htab = bfd_zmalloc (amt);
1031 if (htab == NULL)
1032 return NULL;
1033
1034 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd,
1035 metag_link_hash_newfunc,
1036 sizeof (struct elf_metag_link_hash_entry),
1037 METAG_ELF_DATA))
1038 {
1039 free (htab);
1040 return NULL;
1041 }
1042
1043 /* Init the stub hash table too. */
1044 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc,
1045 sizeof (struct elf_metag_stub_hash_entry)))
1046 return NULL;
1047
1048 return &htab->etab.root;
1049 }
1050
1051 /* Free the derived linker hash table. */
1052
1053 static void
1054 elf_metag_link_hash_table_free (struct bfd_link_hash_table *btab)
1055 {
1056 struct elf_metag_link_hash_table *htab
1057 = (struct elf_metag_link_hash_table *) btab;
1058
1059 bfd_hash_table_free (&htab->bstab);
1060 _bfd_elf_link_hash_table_free (btab);
1061 }
1062
1063 /* Section name for stubs is the associated section name plus this
1064 string. */
1065 #define STUB_SUFFIX ".stub"
1066
1067 /* Build a name for an entry in the stub hash table. */
1068
1069 static char *
1070 metag_stub_name (const asection *input_section,
1071 const asection *sym_sec,
1072 const struct elf_metag_link_hash_entry *hh,
1073 const Elf_Internal_Rela *rel)
1074 {
1075 char *stub_name;
1076 bfd_size_type len;
1077
1078 if (hh)
1079 {
1080 len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1;
1081 stub_name = bfd_malloc (len);
1082 if (stub_name != NULL)
1083 {
1084 sprintf (stub_name, "%08x_%s+%x",
1085 input_section->id & 0xffffffff,
1086 hh->eh.root.root.string,
1087 (int) rel->r_addend & 0xffffffff);
1088 }
1089 }
1090 else
1091 {
1092 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1093 stub_name = bfd_malloc (len);
1094 if (stub_name != NULL)
1095 {
1096 sprintf (stub_name, "%08x_%x:%x+%x",
1097 input_section->id & 0xffffffff,
1098 sym_sec->id & 0xffffffff,
1099 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
1100 (int) rel->r_addend & 0xffffffff);
1101 }
1102 }
1103 return stub_name;
1104 }
1105
1106 /* Look up an entry in the stub hash. Stub entries are cached because
1107 creating the stub name takes a bit of time. */
1108
1109 static struct elf_metag_stub_hash_entry *
1110 metag_get_stub_entry (const asection *input_section,
1111 const asection *sym_sec,
1112 struct elf_metag_link_hash_entry *hh,
1113 const Elf_Internal_Rela *rel,
1114 struct elf_metag_link_hash_table *htab)
1115 {
1116 struct elf_metag_stub_hash_entry *hsh;
1117 const asection *id_sec;
1118
1119 /* If this input section is part of a group of sections sharing one
1120 stub section, then use the id of the first section in the group.
1121 Stub names need to include a section id, as there may well be
1122 more than one stub used to reach say, printf, and we need to
1123 distinguish between them. */
1124 id_sec = htab->stub_group[input_section->id].link_sec;
1125
1126 if (hh != NULL && hh->hsh_cache != NULL
1127 && hh->hsh_cache->hh == hh
1128 && hh->hsh_cache->id_sec == id_sec)
1129 {
1130 hsh = hh->hsh_cache;
1131 }
1132 else
1133 {
1134 char *stub_name;
1135
1136 stub_name = metag_stub_name (id_sec, sym_sec, hh, rel);
1137 if (stub_name == NULL)
1138 return NULL;
1139
1140 hsh = metag_stub_hash_lookup (&htab->bstab,
1141 stub_name, FALSE, FALSE);
1142
1143 if (hh != NULL)
1144 hh->hsh_cache = hsh;
1145
1146 free (stub_name);
1147 }
1148
1149 return hsh;
1150 }
1151
1152 /* Add a new stub entry to the stub hash. Not all fields of the new
1153 stub entry are initialised. */
1154
1155 static struct elf_metag_stub_hash_entry *
1156 metag_add_stub (const char *stub_name,
1157 asection *section,
1158 struct elf_metag_link_hash_table *htab)
1159 {
1160 asection *link_sec;
1161 asection *stub_sec;
1162 struct elf_metag_stub_hash_entry *hsh;
1163
1164 link_sec = htab->stub_group[section->id].link_sec;
1165 stub_sec = htab->stub_group[section->id].stub_sec;
1166 if (stub_sec == NULL)
1167 {
1168 stub_sec = htab->stub_group[link_sec->id].stub_sec;
1169 if (stub_sec == NULL)
1170 {
1171 size_t namelen;
1172 bfd_size_type len;
1173 char *s_name;
1174
1175 namelen = strlen (link_sec->name);
1176 len = namelen + sizeof (STUB_SUFFIX);
1177 s_name = bfd_alloc (htab->stub_bfd, len);
1178 if (s_name == NULL)
1179 return NULL;
1180
1181 memcpy (s_name, link_sec->name, namelen);
1182 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
1183
1184 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
1185 if (stub_sec == NULL)
1186 return NULL;
1187 htab->stub_group[link_sec->id].stub_sec = stub_sec;
1188 }
1189 htab->stub_group[section->id].stub_sec = stub_sec;
1190 }
1191
1192 /* Enter this entry into the linker stub hash table. */
1193 hsh = metag_stub_hash_lookup (&htab->bstab, stub_name,
1194 TRUE, FALSE);
1195 if (hsh == NULL)
1196 {
1197 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
1198 section->owner,
1199 stub_name);
1200 return NULL;
1201 }
1202
1203 hsh->stub_sec = stub_sec;
1204 hsh->stub_offset = 0;
1205 hsh->id_sec = link_sec;
1206 return hsh;
1207 }
1208
1209 /* Check a signed integer value can be represented in the given number
1210 of bits. */
1211
1212 static bfd_boolean
1213 within_signed_range (int value, unsigned int bits)
1214 {
1215 int min_val = -(1 << (bits - 1));
1216 int max_val = (1 << (bits - 1)) - 1;
1217 return (value <= max_val) && (value >= min_val);
1218 }
1219
1220 /* Perform a relocation as part of a final link. */
1221
1222 static bfd_reloc_status_type
1223 metag_final_link_relocate (reloc_howto_type *howto,
1224 bfd *input_bfd,
1225 asection *input_section,
1226 bfd_byte *contents,
1227 Elf_Internal_Rela *rel,
1228 bfd_vma relocation,
1229 struct elf_metag_link_hash_entry *hh,
1230 struct elf_metag_link_hash_table *htab,
1231 asection *sym_sec)
1232 {
1233 bfd_reloc_status_type r = bfd_reloc_ok;
1234 bfd_byte *hit_data = contents + rel->r_offset;
1235 int opcode, op_shift, op_extended, l1, l2;
1236 bfd_signed_vma srel, addend = rel->r_addend;
1237 struct elf_metag_stub_hash_entry *hsh = NULL;
1238 bfd_vma location;
1239
1240 /* Find out where we are and where we're going. */
1241 location = (rel->r_offset +
1242 input_section->output_offset +
1243 input_section->output_section->vma);
1244
1245 switch (howto->type)
1246 {
1247 case R_METAG_RELBRANCH:
1248 case R_METAG_RELBRANCH_PLT:
1249 /* Make it a pc relative offset. */
1250 relocation -= location;
1251 break;
1252 case R_METAG_TLS_GD:
1253 case R_METAG_TLS_IE:
1254 relocation -= elf_gp (input_section->output_section->owner);
1255 break;
1256 default:
1257 break;
1258 }
1259
1260 switch (howto->type)
1261 {
1262 case R_METAG_RELBRANCH_PLT:
1263 case R_METAG_RELBRANCH:
1264 opcode = bfd_get_32 (input_bfd, hit_data);
1265
1266 srel = (bfd_signed_vma) relocation;
1267 srel += addend;
1268
1269 /* If the branch is out of reach, then redirect the
1270 call to the local stub for this function. */
1271 if (srel > ((1 << (BRANCH_BITS + 1)) - 1) ||
1272 (srel < - (1 << (BRANCH_BITS + 1))))
1273 {
1274 if (sym_sec == NULL)
1275 break;
1276
1277 hsh = metag_get_stub_entry (input_section, sym_sec,
1278 hh, rel, htab);
1279 if (hsh == NULL)
1280 return bfd_reloc_undefined;
1281
1282 /* Munge up the value and addend so that we call the stub
1283 rather than the procedure directly. */
1284 srel = (hsh->stub_offset
1285 + hsh->stub_sec->output_offset
1286 + hsh->stub_sec->output_section->vma);
1287 srel -= location;
1288 }
1289
1290 srel = srel >> 2;
1291
1292 if (!within_signed_range (srel, BRANCH_BITS))
1293 {
1294 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1295 srel = 0;
1296 else
1297 return bfd_reloc_overflow;
1298 }
1299
1300 opcode &= ~(0x7ffff << 5);
1301 opcode |= ((srel & 0x7ffff) << 5);
1302
1303 bfd_put_32 (input_bfd, opcode, hit_data);
1304 break;
1305 case R_METAG_GETSETOFF:
1306 case R_METAG_GETSET_GOT:
1307 case R_METAG_GETSET_GOTOFF:
1308 opcode = bfd_get_32 (input_bfd, hit_data);
1309
1310 srel = (bfd_signed_vma) relocation;
1311 srel += addend;
1312
1313 /* Is this a standard or extended GET/SET? */
1314 if ((opcode & 0xf0000000) == 0xa0000000)
1315 {
1316 /* Extended GET/SET. */
1317 l1 = opcode & 0x2;
1318 l2 = opcode & 0x4;
1319 op_extended = 1;
1320 }
1321 else
1322 {
1323 /* Standard GET/SET. */
1324 l1 = opcode & 0x01000000;
1325 l2 = opcode & 0x04000000;
1326 op_extended = 0;
1327 }
1328
1329 /* Calculate the width of the GET/SET and how much we need to
1330 shift the result by. */
1331 if (l2)
1332 if (l1)
1333 op_shift = 3;
1334 else
1335 op_shift = 2;
1336 else
1337 if (l1)
1338 op_shift = 1;
1339 else
1340 op_shift = 0;
1341
1342 /* GET/SET offsets are scaled by the width of the transfer. */
1343 srel = srel >> op_shift;
1344
1345 /* Extended GET/SET has signed 12 bits of offset, standard has
1346 signed 6 bits. */
1347 if (op_extended)
1348 {
1349 if (!within_signed_range (srel, 12))
1350 {
1351 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1352 srel = 0;
1353 else
1354 return bfd_reloc_overflow;
1355 }
1356 opcode &= ~(0xfff << 7);
1357 opcode |= ((srel & 0xfff) << 7);
1358 }
1359 else
1360 {
1361 if (!within_signed_range (srel, 5))
1362 {
1363 if (hh && hh->eh.root.type == bfd_link_hash_undefweak)
1364 srel = 0;
1365 else
1366 return bfd_reloc_overflow;
1367 }
1368 opcode &= ~(0x3f << 8);
1369 opcode |= ((srel & 0x3f) << 8);
1370 }
1371
1372 bfd_put_32 (input_bfd, opcode, hit_data);
1373 break;
1374 case R_METAG_TLS_GD:
1375 case R_METAG_TLS_LDM:
1376 opcode = bfd_get_32 (input_bfd, hit_data);
1377
1378 if ((bfd_signed_vma)relocation < 0)
1379 {
1380 /* sign extend immediate */
1381 if ((opcode & 0xf2000001) == 0x02000000)
1382 {
1383 /* ADD De.e,Dx.r,#I16 */
1384 /* set SE bit */
1385 opcode |= (1 << 1);
1386 } else
1387 return bfd_reloc_overflow;
1388 }
1389
1390 bfd_put_32 (input_bfd, opcode, hit_data);
1391
1392 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1393 contents, rel->r_offset,
1394 relocation, rel->r_addend);
1395 break;
1396 default:
1397 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1398 contents, rel->r_offset,
1399 relocation, rel->r_addend);
1400 }
1401
1402 return r;
1403 }
1404
1405 /* This is defined because R_METAG_NONE != 0...
1406 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1407 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1408 rel, relend, howto, contents) \
1409 { \
1410 _bfd_clear_contents (howto, input_bfd, input_section, \
1411 contents + rel->r_offset); \
1412 \
1413 if (info->relocatable \
1414 && (input_section->flags & SEC_DEBUGGING)) \
1415 { \
1416 /* Only remove relocations in debug sections since other \
1417 sections may require relocations. */ \
1418 Elf_Internal_Shdr *rel_hdr; \
1419 \
1420 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1421 \
1422 /* Avoid empty output section. */ \
1423 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1424 { \
1425 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1426 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1427 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1428 \
1429 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1430 \
1431 input_section->reloc_count--; \
1432 relend--; \
1433 rel--; \
1434 continue; \
1435 } \
1436 } \
1437 \
1438 rel->r_info = R_METAG_NONE; \
1439 rel->r_addend = 0; \
1440 continue; \
1441 }
1442
1443 /* Relocate a META ELF section.
1444
1445 The RELOCATE_SECTION function is called by the new ELF backend linker
1446 to handle the relocations for a section.
1447
1448 The relocs are always passed as Rela structures; if the section
1449 actually uses Rel structures, the r_addend field will always be
1450 zero.
1451
1452 This function is responsible for adjusting the section contents as
1453 necessary, and (if using Rela relocs and generating a relocatable
1454 output file) adjusting the reloc addend as necessary.
1455
1456 This function does not have to worry about setting the reloc
1457 address or the reloc symbol index.
1458
1459 LOCAL_SYMS is a pointer to the swapped in local symbols.
1460
1461 LOCAL_SECTIONS is an array giving the section in the input file
1462 corresponding to the st_shndx field of each local symbol.
1463
1464 The global hash table entry for the global symbols can be found
1465 via elf_sym_hashes (input_bfd).
1466
1467 When generating relocatable output, this function must handle
1468 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1469 going to be the section symbol corresponding to the output
1470 section, which means that the addend must be adjusted
1471 accordingly. */
1472
1473 static bfd_boolean
1474 elf_metag_relocate_section (bfd *output_bfd,
1475 struct bfd_link_info *info,
1476 bfd *input_bfd,
1477 asection *input_section,
1478 bfd_byte *contents,
1479 Elf_Internal_Rela *relocs,
1480 Elf_Internal_Sym *local_syms,
1481 asection **local_sections)
1482 {
1483 bfd_vma *local_got_offsets;
1484 Elf_Internal_Shdr *symtab_hdr;
1485 struct elf_link_hash_entry **eh_syms;
1486 struct elf_metag_link_hash_table *htab;
1487 Elf_Internal_Rela *rel;
1488 Elf_Internal_Rela *relend;
1489 asection *sreloc;
1490
1491 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1492 eh_syms = elf_sym_hashes (input_bfd);
1493 relend = relocs + input_section->reloc_count;
1494
1495 htab = metag_link_hash_table (info);
1496 local_got_offsets = elf_local_got_offsets (input_bfd);
1497
1498 sreloc = NULL;
1499
1500 for (rel = relocs; rel < relend; rel ++)
1501 {
1502 reloc_howto_type *howto;
1503 unsigned long r_symndx;
1504 Elf_Internal_Sym *sym;
1505 asection *sec;
1506 struct elf_metag_link_hash_entry *hh;
1507 bfd_vma relocation;
1508 bfd_reloc_status_type r;
1509 const char *name;
1510 int r_type;
1511
1512 r_type = ELF32_R_TYPE (rel->r_info);
1513
1514 if (r_type == R_METAG_GNU_VTINHERIT
1515 || r_type == R_METAG_GNU_VTENTRY
1516 || r_type == R_METAG_NONE)
1517 continue;
1518
1519 r_symndx = ELF32_R_SYM (rel->r_info);
1520
1521 howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info);
1522 hh = NULL;
1523 sym = NULL;
1524 sec = NULL;
1525
1526 if (r_symndx < symtab_hdr->sh_info)
1527 {
1528 sym = local_syms + r_symndx;
1529 sec = local_sections [r_symndx];
1530 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1531
1532 name = bfd_elf_string_from_elf_section
1533 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1534 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1535 }
1536 else
1537 {
1538 struct elf_link_hash_entry *eh;
1539 bfd_boolean unresolved_reloc, warned, ignored;
1540
1541 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1542 r_symndx, symtab_hdr, eh_syms,
1543 eh, sec, relocation,
1544 unresolved_reloc, warned, ignored);
1545
1546 name = eh->root.root.string;
1547 hh = (struct elf_metag_link_hash_entry *) eh;
1548 }
1549
1550 if (sec != NULL && discarded_section (sec))
1551 METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1552 rel, relend, howto, contents);
1553
1554 if (info->relocatable)
1555 continue;
1556
1557 switch (r_type)
1558 {
1559 case R_METAG_ADDR32:
1560 case R_METAG_RELBRANCH:
1561 if ((input_section->flags & SEC_ALLOC) == 0)
1562 break;
1563
1564 if ((info->shared
1565 && r_symndx != STN_UNDEF
1566 && (input_section->flags & SEC_ALLOC) != 0
1567 && (r_type != R_METAG_RELBRANCH
1568 || !SYMBOL_CALLS_LOCAL (info, &hh->eh)))
1569 || (!info->shared
1570 && hh != NULL
1571 && hh->eh.dynindx != -1
1572 && !hh->eh.non_got_ref
1573 && ((hh->eh.def_dynamic
1574 && !hh->eh.def_regular)
1575 || hh->eh.root.type == bfd_link_hash_undefweak
1576 || hh->eh.root.type == bfd_link_hash_undefined)))
1577 {
1578 Elf_Internal_Rela outrel;
1579 bfd_boolean skip, relocate;
1580 bfd_byte *loc;
1581
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1584 time. */
1585
1586 sreloc = elf_section_data (input_section)->sreloc;
1587 BFD_ASSERT (sreloc != NULL);
1588
1589 skip = FALSE;
1590 relocate = FALSE;
1591
1592 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1593 info,
1594 input_section,
1595 rel->r_offset);
1596 if (outrel.r_offset == (bfd_vma) -1)
1597 skip = TRUE;
1598 else if (outrel.r_offset == (bfd_vma) -2)
1599 skip = TRUE, relocate = TRUE;
1600 outrel.r_offset += (input_section->output_section->vma
1601 + input_section->output_offset);
1602
1603 if (skip)
1604 {
1605 memset (&outrel, 0, sizeof outrel);
1606 outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE);
1607 }
1608 else if (r_type == R_METAG_RELBRANCH)
1609 {
1610 BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1);
1611 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1612 outrel.r_addend = rel->r_addend;
1613 }
1614 else
1615 {
1616 /* h->dynindx may be -1 if this symbol was marked to
1617 become local. */
1618 if (hh == NULL
1619 || ((info->symbolic || hh->eh.dynindx == -1)
1620 && hh->eh.def_regular))
1621 {
1622 relocate = TRUE;
1623 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1624 outrel.r_addend = relocation + rel->r_addend;
1625 }
1626 else
1627 {
1628 BFD_ASSERT (hh->eh.dynindx != -1);
1629 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type);
1630 outrel.r_addend = rel->r_addend;
1631 }
1632 }
1633
1634 loc = sreloc->contents;
1635 loc += sreloc->reloc_count * sizeof(Elf32_External_Rela);
1636 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
1637 ++sreloc->reloc_count;
1638
1639 /* If this reloc is against an external symbol, we do
1640 not want to fiddle with the addend. Otherwise, we
1641 need to include the symbol value so that it becomes
1642 an addend for the dynamic reloc. */
1643 if (! relocate)
1644 continue;
1645 }
1646 break;
1647
1648 case R_METAG_RELBRANCH_PLT:
1649 /* Relocation is to the entry for this symbol in the
1650 procedure linkage table. */
1651
1652 if (hh == NULL)
1653 break;
1654
1655 if (hh->eh.forced_local)
1656 break;
1657
1658 if (hh->eh.plt.offset == (bfd_vma) -1 ||
1659 htab->splt == NULL)
1660 {
1661 /* We didn't make a PLT entry for this symbol. This
1662 happens when statically linking PIC code, or when
1663 using -Bsymbolic. */
1664 break;
1665 }
1666
1667 relocation = (htab->splt->output_section->vma
1668 + htab->splt->output_offset
1669 + hh->eh.plt.offset);
1670 break;
1671 case R_METAG_HI16_GOTPC:
1672 case R_METAG_LO16_GOTPC:
1673 BFD_ASSERT (htab->sgot != NULL);
1674
1675 relocation = (htab->sgot->output_section->vma +
1676 htab->sgot->output_offset);
1677 relocation += GOT_REG_OFFSET;
1678 relocation -= (input_section->output_section->vma
1679 + input_section->output_offset
1680 + rel->r_offset);
1681 break;
1682 case R_METAG_HI16_GOTOFF:
1683 case R_METAG_LO16_GOTOFF:
1684 case R_METAG_GETSET_GOTOFF:
1685 BFD_ASSERT (htab->sgot != NULL);
1686
1687 relocation -= (htab->sgot->output_section->vma +
1688 htab->sgot->output_offset);
1689 relocation -= GOT_REG_OFFSET;
1690 break;
1691 case R_METAG_GETSET_GOT:
1692 {
1693 bfd_vma off;
1694 bfd_boolean do_got = 0;
1695
1696 /* Relocation is to the entry for this symbol in the
1697 global offset table. */
1698 if (hh != NULL)
1699 {
1700 bfd_boolean dyn;
1701
1702 off = hh->eh.got.offset;
1703 dyn = htab->etab.dynamic_sections_created;
1704 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
1705 &hh->eh))
1706 {
1707 /* If we aren't going to call finish_dynamic_symbol,
1708 then we need to handle initialisation of the .got
1709 entry and create needed relocs here. Since the
1710 offset must always be a multiple of 4, we use the
1711 least significant bit to record whether we have
1712 initialised it already. */
1713 if ((off & 1) != 0)
1714 off &= ~1;
1715 else
1716 {
1717 hh->eh.got.offset |= 1;
1718 do_got = 1;
1719 }
1720 }
1721 }
1722 else
1723 {
1724 /* Local symbol case. */
1725 if (local_got_offsets == NULL)
1726 abort ();
1727
1728 off = local_got_offsets[r_symndx];
1729
1730 /* The offset must always be a multiple of 4. We use
1731 the least significant bit to record whether we have
1732 already generated the necessary reloc. */
1733 if ((off & 1) != 0)
1734 off &= ~1;
1735 else
1736 {
1737 local_got_offsets[r_symndx] |= 1;
1738 do_got = 1;
1739 }
1740 }
1741
1742 if (do_got)
1743 {
1744 if (info->shared)
1745 {
1746 /* Output a dynamic relocation for this GOT entry.
1747 In this case it is relative to the base of the
1748 object because the symbol index is zero. */
1749 Elf_Internal_Rela outrel;
1750 bfd_byte *loc;
1751 asection *s = htab->srelgot;
1752
1753 outrel.r_offset = (off
1754 + htab->sgot->output_offset
1755 + htab->sgot->output_section->vma);
1756 outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
1757 outrel.r_addend = relocation;
1758 loc = s->contents;
1759 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1760 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1761 }
1762 else
1763 bfd_put_32 (output_bfd, relocation,
1764 htab->sgot->contents + off);
1765 }
1766
1767 if (off >= (bfd_vma) -2)
1768 abort ();
1769
1770 relocation = off - GOT_REG_OFFSET;
1771 }
1772 break;
1773 case R_METAG_TLS_GD:
1774 case R_METAG_TLS_IE:
1775 {
1776 /* XXXMJF There is room here for optimisations. For example
1777 converting from GD->IE, etc. */
1778 bfd_vma off;
1779 int indx;
1780 char tls_type;
1781
1782 if (htab->sgot == NULL)
1783 abort();
1784
1785 indx = 0;
1786 if (hh != NULL)
1787 {
1788 bfd_boolean dyn;
1789 dyn = htab->etab.dynamic_sections_created;
1790
1791 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, &hh->eh)
1792 && (!info->shared
1793 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))
1794 {
1795 indx = hh->eh.dynindx;
1796 }
1797 off = hh->eh.got.offset;
1798 tls_type = hh->tls_type;
1799 }
1800 else
1801 {
1802 /* Local symbol case. */
1803 if (local_got_offsets == NULL)
1804 abort ();
1805
1806 off = local_got_offsets[r_symndx];
1807 tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx];
1808 }
1809
1810 if (tls_type == GOT_UNKNOWN)
1811 abort();
1812
1813 if ((off & 1) != 0)
1814 off &= ~1;
1815 else
1816 {
1817 bfd_boolean need_relocs = FALSE;
1818 Elf_Internal_Rela outrel;
1819 bfd_byte *loc = NULL;
1820 int cur_off = off;
1821
1822 /* The GOT entries have not been initialized yet. Do it
1823 now, and emit any relocations. If both an IE GOT and a
1824 GD GOT are necessary, we emit the GD first. */
1825
1826 if ((info->shared || indx != 0)
1827 && (hh == NULL
1828 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT
1829 || hh->eh.root.type != bfd_link_hash_undefweak))
1830 {
1831 need_relocs = TRUE;
1832 loc = htab->srelgot->contents;
1833 /* FIXME (CAO): Should this be reloc_count++ ? */
1834 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela);
1835 }
1836
1837 if (tls_type & GOT_TLS_GD)
1838 {
1839 if (need_relocs)
1840 {
1841 outrel.r_offset = (cur_off
1842 + htab->sgot->output_section->vma
1843 + htab->sgot->output_offset);
1844 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD);
1845 outrel.r_addend = 0;
1846 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off);
1847
1848 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1849 htab->srelgot->reloc_count++;
1850 loc += sizeof (Elf32_External_Rela);
1851
1852 if (indx == 0)
1853 bfd_put_32 (output_bfd, 0,
1854 htab->sgot->contents + cur_off + 4);
1855 else
1856 {
1857 bfd_put_32 (output_bfd, 0,
1858 htab->sgot->contents + cur_off + 4);
1859 outrel.r_info = ELF32_R_INFO (indx,
1860 R_METAG_TLS_DTPOFF);
1861 outrel.r_offset += 4;
1862 bfd_elf32_swap_reloca_out (output_bfd,
1863 &outrel, loc);
1864 htab->srelgot->reloc_count++;
1865 loc += sizeof (Elf32_External_Rela);
1866 }
1867 }
1868 else
1869 {
1870 /* We don't support changing the TLS model. */
1871 abort ();
1872 }
1873
1874 cur_off += 8;
1875 }
1876
1877 if (tls_type & GOT_TLS_IE)
1878 {
1879 if (need_relocs)
1880 {
1881 outrel.r_offset = (cur_off
1882 + htab->sgot->output_section->vma
1883 + htab->sgot->output_offset);
1884 outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF);
1885
1886 if (indx == 0)
1887 outrel.r_addend = relocation - dtpoff_base (info);
1888 else
1889 outrel.r_addend = 0;
1890
1891 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1892 htab->srelgot->reloc_count++;
1893 loc += sizeof (Elf32_External_Rela);
1894 }
1895 else
1896 bfd_put_32 (output_bfd, tpoff (info, relocation),
1897 htab->sgot->contents + cur_off);
1898
1899 cur_off += 4;
1900 }
1901
1902 if (hh != NULL)
1903 hh->eh.got.offset |= 1;
1904 else
1905 local_got_offsets[r_symndx] |= 1;
1906 }
1907
1908 /* Add the base of the GOT to the relocation value. */
1909 relocation = off - GOT_REG_OFFSET;
1910
1911 break;
1912 }
1913
1914 case R_METAG_TLS_IENONPIC_HI16:
1915 case R_METAG_TLS_IENONPIC_LO16:
1916 case R_METAG_TLS_LE_HI16:
1917 case R_METAG_TLS_LE_LO16:
1918 if (info->shared)
1919 {
1920 (*_bfd_error_handler)
1921 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1922 input_bfd, input_section,
1923 (long) rel->r_offset, howto->name);
1924 return FALSE;
1925 }
1926 else
1927 relocation = tpoff (info, relocation);
1928 break;
1929 case R_METAG_TLS_LDO_HI16:
1930 case R_METAG_TLS_LDO_LO16:
1931 if (! info->shared)
1932 relocation = tpoff (info, relocation);
1933 else
1934 relocation -= dtpoff_base (info);
1935 break;
1936 case R_METAG_TLS_LDM:
1937 {
1938 bfd_vma off;
1939
1940 if (htab->sgot == NULL)
1941 abort();
1942 off = htab->tls_ldm_got.offset;
1943 if (off & 1)
1944 off &= ~1;
1945 else
1946 {
1947 Elf_Internal_Rela outrel;
1948 bfd_byte *loc;
1949
1950 outrel.r_offset = (off
1951 + htab->sgot->output_section->vma
1952 + htab->sgot->output_offset);
1953
1954 outrel.r_addend = 0;
1955 outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD);
1956 loc = htab->srelgot->contents;
1957 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1958 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1959 htab->tls_ldm_got.offset |= 1;
1960 }
1961
1962 relocation = off - GOT_REG_OFFSET;
1963 break;
1964 }
1965 default:
1966 break;
1967 }
1968
1969 r = metag_final_link_relocate (howto, input_bfd, input_section,
1970 contents, rel, relocation, hh, htab,
1971 sec);
1972
1973 if (r != bfd_reloc_ok)
1974 {
1975 const char * msg = (const char *) NULL;
1976
1977 switch (r)
1978 {
1979 case bfd_reloc_overflow:
1980 r = info->callbacks->reloc_overflow
1981 (info, (hh ? &hh->eh.root : NULL), name, howto->name,
1982 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1983 break;
1984
1985 case bfd_reloc_undefined:
1986 r = info->callbacks->undefined_symbol
1987 (info, name, input_bfd, input_section, rel->r_offset,
1988 TRUE);
1989 break;
1990
1991 case bfd_reloc_outofrange:
1992 msg = _("internal error: out of range error");
1993 break;
1994
1995 case bfd_reloc_notsupported:
1996 msg = _("internal error: unsupported relocation error");
1997 break;
1998
1999 case bfd_reloc_dangerous:
2000 msg = _("internal error: dangerous relocation");
2001 break;
2002
2003 default:
2004 msg = _("internal error: unknown error");
2005 break;
2006 }
2007
2008 if (msg)
2009 r = info->callbacks->warning
2010 (info, msg, name, input_bfd, input_section, rel->r_offset);
2011
2012 if (! r)
2013 return FALSE;
2014 }
2015 }
2016
2017 return TRUE;
2018 }
2019
2020 /* Create the .plt and .got sections, and set up our hash table
2021 short-cuts to various dynamic sections. */
2022
2023 static bfd_boolean
2024 elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2025 {
2026 struct elf_metag_link_hash_table *htab;
2027 struct elf_link_hash_entry *eh;
2028 struct bfd_link_hash_entry *bh;
2029 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2030
2031 /* Don't try to create the .plt and .got twice. */
2032 htab = metag_link_hash_table (info);
2033 if (htab->splt != NULL)
2034 return TRUE;
2035
2036 /* Call the generic code to do most of the work. */
2037 if (! _bfd_elf_create_dynamic_sections (abfd, info))
2038 return FALSE;
2039
2040 htab->sgot = bfd_get_linker_section (abfd, ".got");
2041 if (! htab->sgot)
2042 return FALSE;
2043
2044 htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt",
2045 (SEC_ALLOC | SEC_LOAD |
2046 SEC_HAS_CONTENTS |
2047 SEC_IN_MEMORY |
2048 SEC_LINKER_CREATED));
2049 if (htab->sgotplt == NULL
2050 || !bfd_set_section_alignment (abfd, htab->sgotplt, 2))
2051 return FALSE;
2052
2053 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2054 section. We don't do this in the linker script because we don't want
2055 to define the symbol if we are not creating a global offset table. */
2056 bh = NULL;
2057 if (!(_bfd_generic_link_add_one_symbol
2058 (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot,
2059 (bfd_vma) 0, NULL, FALSE, bed->collect, &bh)))
2060 return FALSE;
2061 eh = (struct elf_link_hash_entry *) bh;
2062 eh->def_regular = 1;
2063 eh->type = STT_OBJECT;
2064 eh->other = STV_HIDDEN;
2065
2066 if (! info->executable
2067 && ! bfd_elf_link_record_dynamic_symbol (info, eh))
2068 return FALSE;
2069
2070 elf_hash_table (info)->hgot = eh;
2071
2072 htab->splt = bfd_get_linker_section (abfd, ".plt");
2073 htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt");
2074
2075 htab->srelgot = bfd_get_linker_section (abfd, ".rela.got");
2076
2077 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss");
2078 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss");
2079
2080 return TRUE;
2081 }
2082
2083 /* Look through the relocs for a section during the first phase, and
2084 calculate needed space in the global offset table, procedure linkage
2085 table, and dynamic reloc sections. At this point we haven't
2086 necessarily read all the input files. */
2087
2088 static bfd_boolean
2089 elf_metag_check_relocs (bfd *abfd,
2090 struct bfd_link_info *info,
2091 asection *sec,
2092 const Elf_Internal_Rela *relocs)
2093 {
2094 Elf_Internal_Shdr *symtab_hdr;
2095 struct elf_link_hash_entry **eh_syms;
2096 const Elf_Internal_Rela *rel;
2097 const Elf_Internal_Rela *rel_end;
2098 struct elf_metag_link_hash_table *htab;
2099 asection *sreloc;
2100 bfd *dynobj;
2101 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN;
2102
2103 if (info->relocatable)
2104 return TRUE;
2105
2106 htab = metag_link_hash_table (info);
2107 dynobj = htab->etab.dynobj;
2108 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2109 eh_syms = elf_sym_hashes (abfd);
2110 sreloc = NULL;
2111
2112 if (htab == NULL)
2113 return FALSE;
2114
2115 rel_end = relocs + sec->reloc_count;
2116 for (rel = relocs; rel < rel_end; rel++)
2117 {
2118 int r_type;
2119 struct elf_metag_link_hash_entry *hh;
2120 Elf_Internal_Sym *isym;
2121 unsigned long r_symndx;
2122
2123 r_symndx = ELF32_R_SYM (rel->r_info);
2124 r_type = ELF32_R_TYPE (rel->r_info);
2125 if (r_symndx < symtab_hdr->sh_info)
2126 {
2127 /* A local symbol. */
2128 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2129 abfd, r_symndx);
2130 if (isym == NULL)
2131 return FALSE;
2132
2133 hh = NULL;
2134 }
2135 else
2136 {
2137 isym = NULL;
2138
2139 hh = (struct elf_metag_link_hash_entry *)
2140 eh_syms[r_symndx - symtab_hdr->sh_info];
2141 while (hh->eh.root.type == bfd_link_hash_indirect
2142 || hh->eh.root.type == bfd_link_hash_warning)
2143 hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link;
2144
2145 /* PR15323, ref flags aren't set for references in the same
2146 object. */
2147 hh->eh.root.non_ir_ref = 1;
2148 }
2149
2150 /* Some relocs require a global offset table. */
2151 if (htab->sgot == NULL)
2152 {
2153 switch (r_type)
2154 {
2155 case R_METAG_TLS_GD:
2156 case R_METAG_TLS_LDM:
2157 case R_METAG_TLS_IE:
2158 if (info->shared)
2159 info->flags |= DF_STATIC_TLS;
2160 /* Fall through. */
2161
2162 case R_METAG_HI16_GOTOFF:
2163 case R_METAG_LO16_GOTOFF:
2164 case R_METAG_GETSET_GOTOFF:
2165 case R_METAG_GETSET_GOT:
2166 case R_METAG_HI16_GOTPC:
2167 case R_METAG_LO16_GOTPC:
2168 if (dynobj == NULL)
2169 htab->etab.dynobj = dynobj = abfd;
2170 if (!elf_metag_create_dynamic_sections (dynobj, info))
2171 return FALSE;
2172 break;
2173
2174 default:
2175 break;
2176 }
2177 }
2178
2179 switch (r_type)
2180 {
2181 case R_METAG_TLS_IE:
2182 case R_METAG_TLS_GD:
2183 case R_METAG_GETSET_GOT:
2184 switch (r_type)
2185 {
2186 default:
2187 tls_type = GOT_NORMAL;
2188 break;
2189 case R_METAG_TLS_IE:
2190 tls_type = GOT_TLS_IE;
2191 break;
2192 case R_METAG_TLS_GD:
2193 tls_type = GOT_TLS_GD;
2194 break;
2195 }
2196
2197 if (hh != NULL)
2198 {
2199 hh->eh.got.refcount += 1;
2200 old_tls_type = hh->tls_type;
2201 }
2202 else
2203 {
2204 bfd_signed_vma *local_got_refcounts;
2205
2206 /* This is a global offset table entry for a local
2207 symbol. */
2208 local_got_refcounts = elf_local_got_refcounts (abfd);
2209 if (local_got_refcounts == NULL)
2210 {
2211 bfd_size_type size;
2212
2213 size = symtab_hdr->sh_info;
2214 size *= sizeof (bfd_signed_vma);
2215 /* Add in space to store the local GOT TLS types. */
2216 size += symtab_hdr->sh_info;
2217 local_got_refcounts = ((bfd_signed_vma *)
2218 bfd_zalloc (abfd, size));
2219 if (local_got_refcounts == NULL)
2220 return FALSE;
2221 elf_local_got_refcounts (abfd) = local_got_refcounts;
2222 memset (metag_elf_local_got_tls_type (abfd),
2223 GOT_UNKNOWN, symtab_hdr->sh_info);
2224 }
2225 local_got_refcounts[r_symndx] += 1;
2226 old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx];
2227 }
2228
2229 if (old_tls_type != tls_type)
2230 {
2231 if (hh != NULL)
2232 {
2233 hh->tls_type = tls_type;
2234 }
2235 else
2236 {
2237 metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
2238 }
2239 }
2240
2241 break;
2242
2243 case R_METAG_TLS_LDM:
2244 metag_link_hash_table (info)->tls_ldm_got.refcount += 1;
2245 break;
2246
2247 case R_METAG_RELBRANCH_PLT:
2248 /* This symbol requires a procedure linkage table entry. We
2249 actually build the entry in adjust_dynamic_symbol,
2250 because this might be a case of linking PIC code without
2251 linking in any dynamic objects, in which case we don't
2252 need to generate a procedure linkage table after all. */
2253
2254 /* If this is a local symbol, we resolve it directly without
2255 creating a procedure linkage table entry. */
2256 if (hh == NULL)
2257 continue;
2258
2259 if (hh->eh.forced_local)
2260 break;
2261
2262 hh->eh.needs_plt = 1;
2263 hh->eh.plt.refcount += 1;
2264 break;
2265
2266 case R_METAG_HIADDR16:
2267 case R_METAG_LOADDR16:
2268 /* Let's help debug shared library creation. These relocs
2269 cannot be used in shared libs. Don't error out for
2270 sections we don't care about, such as debug sections or
2271 non-constant sections. */
2272 if (info->shared
2273 && (sec->flags & SEC_ALLOC) != 0
2274 && (sec->flags & SEC_READONLY) != 0)
2275 {
2276 const char *name;
2277
2278 if (hh)
2279 name = hh->eh.root.root.string;
2280 else
2281 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2282 (*_bfd_error_handler)
2283 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2284 abfd, elf_metag_howto_table[r_type].name, name);
2285 bfd_set_error (bfd_error_bad_value);
2286 return FALSE;
2287 }
2288
2289 /* Fall through. */
2290 case R_METAG_ADDR32:
2291 case R_METAG_RELBRANCH:
2292 case R_METAG_GETSETOFF:
2293 if (hh != NULL && !info->shared)
2294 {
2295 hh->eh.non_got_ref = 1;
2296 hh->eh.plt.refcount += 1;
2297 }
2298
2299 /* If we are creating a shared library, and this is a reloc
2300 against a global symbol, or a non PC relative reloc
2301 against a local symbol, then we need to copy the reloc
2302 into the shared library. However, if we are linking with
2303 -Bsymbolic, we do not need to copy a reloc against a
2304 global symbol which is defined in an object we are
2305 including in the link (i.e., DEF_REGULAR is set). At
2306 this point we have not seen all the input files, so it is
2307 possible that DEF_REGULAR is not set now but will be set
2308 later (it is never cleared). We account for that
2309 possibility below by storing information in the
2310 dyn_relocs field of the hash table entry. A similar
2311 situation occurs when creating shared libraries and symbol
2312 visibility changes render the symbol local.
2313
2314 If on the other hand, we are creating an executable, we
2315 may need to keep relocations for symbols satisfied by a
2316 dynamic library if we manage to avoid copy relocs for the
2317 symbol. */
2318 if ((info->shared
2319 && (sec->flags & SEC_ALLOC) != 0
2320 && (r_type != R_METAG_RELBRANCH
2321 || (hh != NULL
2322 && (! info->symbolic
2323 || hh->eh.root.type == bfd_link_hash_defweak
2324 || !hh->eh.def_regular))))
2325 || (!info->shared
2326 && (sec->flags & SEC_ALLOC) != 0
2327 && hh != NULL
2328 && (hh->eh.root.type == bfd_link_hash_defweak
2329 || !hh->eh.def_regular)))
2330 {
2331 struct elf_metag_dyn_reloc_entry *hdh_p;
2332 struct elf_metag_dyn_reloc_entry **hdh_head;
2333
2334 if (dynobj == NULL)
2335 htab->etab.dynobj = dynobj = abfd;
2336
2337 /* When creating a shared object, we must copy these
2338 relocs into the output file. We create a reloc
2339 section in dynobj and make room for the reloc. */
2340 if (sreloc == NULL)
2341 {
2342 sreloc = _bfd_elf_make_dynamic_reloc_section
2343 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE);
2344
2345 if (sreloc == NULL)
2346 {
2347 bfd_set_error (bfd_error_bad_value);
2348 return FALSE;
2349 }
2350
2351 elf_section_data (sec)->sreloc = sreloc;
2352 }
2353
2354 /* If this is a global symbol, we count the number of
2355 relocations we need for this symbol. */
2356 if (hh != NULL)
2357 hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs;
2358 else
2359 {
2360 /* Track dynamic relocs needed for local syms too. */
2361 asection *sr;
2362 void *vpp;
2363
2364 sr = bfd_section_from_elf_index (abfd, isym->st_shndx);
2365 if (sr == NULL)
2366 sr = sec;
2367
2368 vpp = &elf_section_data (sr)->local_dynrel;
2369 hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp;
2370 }
2371
2372 hdh_p = *hdh_head;
2373 if (hdh_p == NULL || hdh_p->sec != sec)
2374 {
2375 hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2376 bfd_alloc (dynobj, sizeof *hdh_p));
2377 if (hdh_p == NULL)
2378 return FALSE;
2379 hdh_p->hdh_next = *hdh_head;
2380 *hdh_head = hdh_p;
2381 hdh_p->sec = sec;
2382 hdh_p->count = 0;
2383 hdh_p->relative_count = 0;
2384 }
2385
2386 hdh_p->count += 1;
2387 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
2388 hdh_p->relative_count += 1;
2389 }
2390 break;
2391
2392 /* This relocation describes the C++ object vtable hierarchy.
2393 Reconstruct it for later use during GC. */
2394 case R_METAG_GNU_VTINHERIT:
2395 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh,
2396 rel->r_offset))
2397 return FALSE;
2398 break;
2399
2400 /* This relocation describes which C++ vtable entries are actually
2401 used. Record for later use during GC. */
2402 case R_METAG_GNU_VTENTRY:
2403 BFD_ASSERT (hh != NULL);
2404 if (hh != NULL
2405 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend))
2406 return FALSE;
2407 break;
2408 }
2409 }
2410
2411 return TRUE;
2412 }
2413
2414 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2415
2416 static void
2417 elf_metag_copy_indirect_symbol (struct bfd_link_info *info,
2418 struct elf_link_hash_entry *eh_dir,
2419 struct elf_link_hash_entry *eh_ind)
2420 {
2421 struct elf_metag_link_hash_entry *hh_dir, *hh_ind;
2422
2423 hh_dir = metag_elf_hash_entry (eh_dir);
2424 hh_ind = metag_elf_hash_entry (eh_ind);
2425
2426 if (hh_ind->dyn_relocs != NULL)
2427 {
2428 if (hh_dir->dyn_relocs != NULL)
2429 {
2430 struct elf_metag_dyn_reloc_entry **hdh_pp;
2431 struct elf_metag_dyn_reloc_entry *hdh_p;
2432
2433 if (eh_ind->root.type == bfd_link_hash_indirect)
2434 abort ();
2435
2436 /* Add reloc counts against the weak sym to the strong sym
2437 list. Merge any entries against the same section. */
2438 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2439 {
2440 struct elf_metag_dyn_reloc_entry *hdh_q;
2441
2442 for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL;
2443 hdh_q = hdh_q->hdh_next)
2444 if (hdh_q->sec == hdh_p->sec)
2445 {
2446 hdh_q->relative_count += hdh_p->relative_count;
2447 hdh_q->count += hdh_p->count;
2448 *hdh_pp = hdh_p->hdh_next;
2449 break;
2450 }
2451 if (hdh_q == NULL)
2452 hdh_pp = &hdh_p->hdh_next;
2453 }
2454 *hdh_pp = hh_dir->dyn_relocs;
2455 }
2456
2457 hh_dir->dyn_relocs = hh_ind->dyn_relocs;
2458 hh_ind->dyn_relocs = NULL;
2459 }
2460
2461 if (eh_ind->root.type == bfd_link_hash_indirect
2462 && eh_dir->got.refcount <= 0)
2463 {
2464 hh_dir->tls_type = hh_ind->tls_type;
2465 hh_ind->tls_type = GOT_UNKNOWN;
2466 }
2467
2468 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
2469 }
2470
2471 /* Adjust a symbol defined by a dynamic object and referenced by a
2472 regular object. The current definition is in some section of the
2473 dynamic object, but we're not including those sections. We have to
2474 change the definition to something the rest of the link can
2475 understand. */
2476
2477 static bfd_boolean
2478 elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info,
2479 struct elf_link_hash_entry *eh)
2480 {
2481 struct elf_metag_link_hash_table *htab;
2482 struct elf_metag_link_hash_entry *hh;
2483 struct elf_metag_dyn_reloc_entry *hdh_p;
2484 asection *s;
2485
2486 /* If this is a function, put it in the procedure linkage table. We
2487 will fill in the contents of the procedure linkage table later,
2488 when we know the address of the .got section. */
2489 if (eh->type == STT_FUNC
2490 || eh->needs_plt)
2491 {
2492 if (eh->plt.refcount <= 0
2493 || SYMBOL_CALLS_LOCAL (info, eh)
2494 || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT
2495 && eh->root.type == bfd_link_hash_undefweak))
2496 {
2497 /* This case can occur if we saw a PLT reloc in an input
2498 file, but the symbol was never referred to by a dynamic
2499 object. In such a case, we don't actually need to build
2500 a procedure linkage table, and we can just do a PCREL
2501 reloc instead. */
2502 eh->plt.offset = (bfd_vma) -1;
2503 eh->needs_plt = 0;
2504 }
2505
2506 return TRUE;
2507 }
2508 else
2509 eh->plt.offset = (bfd_vma) -1;
2510
2511 /* If this is a weak symbol, and there is a real definition, the
2512 processor independent code will have arranged for us to see the
2513 real definition first, and we can just use the same value. */
2514 if (eh->u.weakdef != NULL)
2515 {
2516 if (eh->u.weakdef->root.type != bfd_link_hash_defined
2517 && eh->u.weakdef->root.type != bfd_link_hash_defweak)
2518 abort ();
2519 eh->root.u.def.section = eh->u.weakdef->root.u.def.section;
2520 eh->root.u.def.value = eh->u.weakdef->root.u.def.value;
2521 eh->non_got_ref = eh->u.weakdef->non_got_ref;
2522 return TRUE;
2523 }
2524
2525 /* This is a reference to a symbol defined by a dynamic object which
2526 is not a function. */
2527
2528 /* If we are creating a shared library, we must presume that the
2529 only references to the symbol are via the global offset table.
2530 For such cases we need not do anything here; the relocations will
2531 be handled correctly by relocate_section. */
2532 if (info->shared)
2533 return TRUE;
2534
2535 /* If there are no references to this symbol that do not use the
2536 GOT, we don't need to generate a copy reloc. */
2537 if (!eh->non_got_ref)
2538 return TRUE;
2539
2540 /* If -z nocopyreloc was given, we won't generate them either. */
2541 if (info->nocopyreloc)
2542 {
2543 eh->non_got_ref = 0;
2544 return TRUE;
2545 }
2546
2547 hh = (struct elf_metag_link_hash_entry *) eh;
2548 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2549 {
2550 s = hdh_p->sec->output_section;
2551 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2552 break;
2553 }
2554
2555 /* If we didn't find any dynamic relocs in read-only sections, then
2556 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2557 if (hdh_p == NULL)
2558 {
2559 eh->non_got_ref = 0;
2560 return TRUE;
2561 }
2562
2563 /* We must allocate the symbol in our .dynbss section, which will
2564 become part of the .bss section of the executable. There will be
2565 an entry for this symbol in the .dynsym section. The dynamic
2566 object will contain position independent code, so all references
2567 from the dynamic object to this symbol will go through the global
2568 offset table. The dynamic linker will use the .dynsym entry to
2569 determine the address it must put in the global offset table, so
2570 both the dynamic object and the regular object will refer to the
2571 same memory location for the variable. */
2572
2573 htab = metag_link_hash_table (info);
2574
2575 /* We must generate a COPY reloc to tell the dynamic linker to
2576 copy the initial value out of the dynamic object and into the
2577 runtime process image. */
2578 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0)
2579 {
2580 htab->srelbss->size += sizeof (Elf32_External_Rela);
2581 eh->needs_copy = 1;
2582 }
2583
2584 s = htab->sdynbss;
2585
2586 return _bfd_elf_adjust_dynamic_copy (eh, s);
2587 }
2588
2589 /* Allocate space in .plt, .got and associated reloc sections for
2590 global syms. */
2591
2592 static bfd_boolean
2593 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2594 {
2595 struct bfd_link_info *info;
2596 struct elf_metag_link_hash_table *htab;
2597 struct elf_metag_link_hash_entry *hh;
2598 struct elf_metag_dyn_reloc_entry *hdh_p;
2599
2600 if (eh->root.type == bfd_link_hash_indirect)
2601 return TRUE;
2602
2603 if (eh->root.type == bfd_link_hash_warning)
2604 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2605
2606 info = inf;
2607 htab = metag_link_hash_table (info);
2608
2609 if (htab->etab.dynamic_sections_created
2610 && eh->plt.refcount > 0)
2611 {
2612 /* Make sure this symbol is output as a dynamic symbol.
2613 Undefined weak syms won't yet be marked as dynamic. */
2614 if (eh->dynindx == -1
2615 && !eh->forced_local)
2616 {
2617 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2618 return FALSE;
2619 }
2620
2621 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, eh))
2622 {
2623 asection *s = htab->splt;
2624
2625 /* If this is the first .plt entry, make room for the special
2626 first entry. */
2627 if (s->size == 0)
2628 s->size += PLT_ENTRY_SIZE;
2629
2630 eh->plt.offset = s->size;
2631
2632 /* If this symbol is not defined in a regular file, and we are
2633 not generating a shared library, then set the symbol to this
2634 location in the .plt. This is required to make function
2635 pointers compare as equal between the normal executable and
2636 the shared library. */
2637 if (! info->shared
2638 && !eh->def_regular)
2639 {
2640 eh->root.u.def.section = s;
2641 eh->root.u.def.value = eh->plt.offset;
2642 }
2643
2644 /* Make room for this entry. */
2645 s->size += PLT_ENTRY_SIZE;
2646
2647 /* We also need to make an entry in the .got.plt section, which
2648 will be placed in the .got section by the linker script. */
2649 htab->sgotplt->size += 4;
2650
2651 /* We also need to make an entry in the .rel.plt section. */
2652 htab->srelplt->size += sizeof (Elf32_External_Rela);
2653 }
2654 else
2655 {
2656 eh->plt.offset = (bfd_vma) -1;
2657 eh->needs_plt = 0;
2658 }
2659 }
2660 else
2661 {
2662 eh->plt.offset = (bfd_vma) -1;
2663 eh->needs_plt = 0;
2664 }
2665
2666 if (eh->got.refcount > 0)
2667 {
2668 asection *s;
2669 bfd_boolean dyn;
2670 int tls_type = metag_elf_hash_entry (eh)->tls_type;
2671
2672 /* Make sure this symbol is output as a dynamic symbol.
2673 Undefined weak syms won't yet be marked as dynamic. */
2674 if (eh->dynindx == -1
2675 && !eh->forced_local)
2676 {
2677 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2678 return FALSE;
2679 }
2680
2681 s = htab->sgot;
2682
2683 eh->got.offset = s->size;
2684 s->size += 4;
2685 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2686 if (tls_type == GOT_TLS_GD)
2687 s->size += 4;
2688 dyn = htab->etab.dynamic_sections_created;
2689 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2690 R_METAG_TLS_GD needs one if local symbol and two if global. */
2691 if ((tls_type == GOT_TLS_GD && eh->dynindx == -1)
2692 || (tls_type == GOT_TLS_IE && dyn))
2693 htab->srelgot->size += sizeof (Elf32_External_Rela);
2694 else if (tls_type == GOT_TLS_GD)
2695 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2696 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, eh))
2697 htab->srelgot->size += sizeof (Elf32_External_Rela);
2698 }
2699 else
2700 eh->got.offset = (bfd_vma) -1;
2701
2702 hh = (struct elf_metag_link_hash_entry *) eh;
2703 if (hh->dyn_relocs == NULL)
2704 return TRUE;
2705
2706 /* If this is a -Bsymbolic shared link, then we need to discard all
2707 space allocated for dynamic pc-relative relocs against symbols
2708 defined in a regular object. For the normal shared case, discard
2709 space for relocs that have become local due to symbol visibility
2710 changes. */
2711 if (info->shared)
2712 {
2713 if (SYMBOL_CALLS_LOCAL (info, eh))
2714 {
2715 struct elf_metag_dyn_reloc_entry **hdh_pp;
2716
2717 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; )
2718 {
2719 hdh_p->count -= hdh_p->relative_count;
2720 hdh_p->relative_count = 0;
2721 if (hdh_p->count == 0)
2722 *hdh_pp = hdh_p->hdh_next;
2723 else
2724 hdh_pp = &hdh_p->hdh_next;
2725 }
2726 }
2727
2728 /* Also discard relocs on undefined weak syms with non-default
2729 visibility. */
2730 if (hh->dyn_relocs != NULL
2731 && eh->root.type == bfd_link_hash_undefweak)
2732 {
2733 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT)
2734 hh->dyn_relocs = NULL;
2735
2736 /* Make sure undefined weak symbols are output as a dynamic
2737 symbol in PIEs. */
2738 else if (eh->dynindx == -1
2739 && !eh->forced_local)
2740 {
2741 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2742 return FALSE;
2743 }
2744 }
2745 }
2746 else
2747 {
2748 /* For the non-shared case, discard space for relocs against
2749 symbols which turn out to need copy relocs or are not
2750 dynamic. */
2751 if (!eh->non_got_ref
2752 && ((eh->def_dynamic
2753 && !eh->def_regular)
2754 || (htab->etab.dynamic_sections_created
2755 && (eh->root.type == bfd_link_hash_undefweak
2756 || eh->root.type == bfd_link_hash_undefined))))
2757 {
2758 /* Make sure this symbol is output as a dynamic symbol.
2759 Undefined weak syms won't yet be marked as dynamic. */
2760 if (eh->dynindx == -1
2761 && !eh->forced_local)
2762 {
2763 if (! bfd_elf_link_record_dynamic_symbol (info, eh))
2764 return FALSE;
2765 }
2766
2767 /* If that succeeded, we know we'll be keeping all the
2768 relocs. */
2769 if (eh->dynindx != -1)
2770 goto keep;
2771 }
2772
2773 hh->dyn_relocs = NULL;
2774 return TRUE;
2775
2776 keep: ;
2777 }
2778
2779 /* Finally, allocate space. */
2780 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2781 {
2782 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc;
2783 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela);
2784 }
2785
2786 return TRUE;
2787 }
2788
2789 /* Find any dynamic relocs that apply to read-only sections. */
2790
2791 static bfd_boolean
2792 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf)
2793 {
2794 struct elf_metag_link_hash_entry *hh;
2795 struct elf_metag_dyn_reloc_entry *hdh_p;
2796
2797 if (eh->root.type == bfd_link_hash_warning)
2798 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
2799
2800 hh = (struct elf_metag_link_hash_entry *) eh;
2801 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next)
2802 {
2803 asection *s = hdh_p->sec->output_section;
2804
2805 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2806 {
2807 struct bfd_link_info *info = inf;
2808
2809 info->flags |= DF_TEXTREL;
2810
2811 /* Not an error, just cut short the traversal. */
2812 return FALSE;
2813 }
2814 }
2815 return TRUE;
2816 }
2817
2818 /* Set the sizes of the dynamic sections. */
2819
2820 static bfd_boolean
2821 elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2822 struct bfd_link_info *info)
2823 {
2824 struct elf_metag_link_hash_table *htab;
2825 bfd *dynobj;
2826 bfd *ibfd;
2827 asection *s;
2828 bfd_boolean relocs;
2829
2830 htab = metag_link_hash_table (info);
2831 dynobj = htab->etab.dynobj;
2832 if (dynobj == NULL)
2833 abort ();
2834
2835 if (htab->etab.dynamic_sections_created)
2836 {
2837 /* Set the contents of the .interp section to the interpreter. */
2838 if (info->executable)
2839 {
2840 s = bfd_get_linker_section (dynobj, ".interp");
2841 if (s == NULL)
2842 abort ();
2843 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2844 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2845 }
2846 }
2847
2848 /* Set up .got offsets for local syms, and space for local dynamic
2849 relocs. */
2850 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2851 {
2852 bfd_signed_vma *local_got;
2853 bfd_signed_vma *end_local_got;
2854 bfd_size_type locsymcount;
2855 Elf_Internal_Shdr *symtab_hdr;
2856 asection *srel;
2857 char *local_tls_type;
2858
2859 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2860 continue;
2861
2862 for (s = ibfd->sections; s != NULL; s = s->next)
2863 {
2864 struct elf_metag_dyn_reloc_entry *hdh_p;
2865
2866 for (hdh_p = ((struct elf_metag_dyn_reloc_entry *)
2867 elf_section_data (s)->local_dynrel);
2868 hdh_p != NULL;
2869 hdh_p = hdh_p->hdh_next)
2870 {
2871 if (!bfd_is_abs_section (hdh_p->sec)
2872 && bfd_is_abs_section (hdh_p->sec->output_section))
2873 {
2874 /* Input section has been discarded, either because
2875 it is a copy of a linkonce section or due to
2876 linker script /DISCARD/, so we'll be discarding
2877 the relocs too. */
2878 }
2879 else if (hdh_p->count != 0)
2880 {
2881 srel = elf_section_data (hdh_p->sec)->sreloc;
2882 srel->size += hdh_p->count * sizeof (Elf32_External_Rela);
2883 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
2884 info->flags |= DF_TEXTREL;
2885 }
2886 }
2887 }
2888
2889 local_got = elf_local_got_refcounts (ibfd);
2890 if (!local_got)
2891 continue;
2892
2893 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2894 locsymcount = symtab_hdr->sh_info;
2895 end_local_got = local_got + locsymcount;
2896 local_tls_type = metag_elf_local_got_tls_type (ibfd);
2897 s = htab->sgot;
2898 srel = htab->srelgot;
2899 for (; local_got < end_local_got; ++local_got)
2900 {
2901 if (*local_got > 0)
2902 {
2903 *local_got = s->size;
2904 s->size += GOT_ENTRY_SIZE;
2905 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2906 if (*local_tls_type == GOT_TLS_GD)
2907 s->size += 4;
2908 if (info->shared)
2909 srel->size += sizeof (Elf32_External_Rela);
2910 }
2911 else
2912 *local_got = (bfd_vma) -1;
2913 ++local_tls_type;
2914 }
2915 }
2916
2917 if (htab->tls_ldm_got.refcount > 0)
2918 {
2919 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2920 reloc. */
2921 htab->tls_ldm_got.offset = htab->sgot->size;
2922 htab->sgot->size += 8;
2923 htab->srelgot->size += sizeof (Elf32_External_Rela);
2924 }
2925 else
2926 htab->tls_ldm_got.offset = -1;
2927
2928 /* Allocate global sym .plt and .got entries, and space for global
2929 sym dynamic relocs. */
2930 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info);
2931
2932 /* We now have determined the sizes of the various dynamic sections.
2933 Allocate memory for them. */
2934 relocs = FALSE;
2935 for (s = dynobj->sections; s != NULL; s = s->next)
2936 {
2937 bfd_boolean reloc_section = FALSE;
2938
2939 if ((s->flags & SEC_LINKER_CREATED) == 0)
2940 continue;
2941
2942 if (s == htab->splt
2943 || s == htab->sgot
2944 || s == htab->sgotplt
2945 || s == htab->sdynbss)
2946 {
2947 /* Strip this section if we don't need it; see the
2948 comment below. */
2949 }
2950 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2951 {
2952 if (s->size != 0 && s != htab->srelplt)
2953 relocs = TRUE;
2954
2955 /* We use the reloc_count field as a counter if we need
2956 to copy relocs into the output file. */
2957 s->reloc_count = 0;
2958 reloc_section = TRUE;
2959 }
2960 else
2961 {
2962 /* It's not one of our sections, so don't allocate space. */
2963 continue;
2964 }
2965
2966 if (s->size == 0)
2967 {
2968 /* If we don't need this section, strip it from the
2969 output file. This is mostly to handle .rela.bss and
2970 .rela.plt. We must create both sections in
2971 create_dynamic_sections, because they must be created
2972 before the linker maps input sections to output
2973 sections. The linker does that before
2974 adjust_dynamic_symbol is called, and it is that
2975 function which decides whether anything needs to go
2976 into these sections. */
2977 s->flags |= SEC_EXCLUDE;
2978 continue;
2979 }
2980
2981 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2982 continue;
2983
2984 /* Allocate memory for the section contents. */
2985 s->contents = bfd_zalloc (dynobj, s->size);
2986 if (s->contents == NULL)
2987 return FALSE;
2988 else if (reloc_section)
2989 {
2990 unsigned char *contents = s->contents;
2991 Elf32_External_Rela reloc;
2992
2993 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2994 memset(&reloc, 0, sizeof(Elf32_External_Rela));
2995 reloc.r_info[0] = R_METAG_NONE;
2996 for (; contents < (s->contents + s->size);
2997 contents += sizeof(Elf32_External_Rela))
2998 {
2999 memcpy(contents, &reloc, sizeof(Elf32_External_Rela));
3000 }
3001 }
3002 }
3003
3004 if (htab->etab.dynamic_sections_created)
3005 {
3006 /* Add some entries to the .dynamic section. We fill in the
3007 values later, in elf_metag_finish_dynamic_sections, but we
3008 must add the entries now so that we get the correct size for
3009 the .dynamic section. The DT_DEBUG entry is filled in by the
3010 dynamic linker and used by the debugger. */
3011 #define add_dynamic_entry(TAG, VAL) \
3012 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3013
3014 if (!add_dynamic_entry (DT_PLTGOT, 0))
3015 return FALSE;
3016
3017 if (info->executable)
3018 {
3019 if (!add_dynamic_entry (DT_DEBUG, 0))
3020 return FALSE;
3021 }
3022
3023 if (htab->srelplt->size != 0)
3024 {
3025 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3026 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3027 || !add_dynamic_entry (DT_JMPREL, 0))
3028 return FALSE;
3029 }
3030
3031 if (relocs)
3032 {
3033 if (!add_dynamic_entry (DT_RELA, 0)
3034 || !add_dynamic_entry (DT_RELASZ, 0)
3035 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3036 return FALSE;
3037
3038 /* If any dynamic relocs apply to a read-only section,
3039 then we need a DT_TEXTREL entry. */
3040 if ((info->flags & DF_TEXTREL) == 0)
3041 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info);
3042
3043 if ((info->flags & DF_TEXTREL) != 0)
3044 {
3045 if (!add_dynamic_entry (DT_TEXTREL, 0))
3046 return FALSE;
3047 }
3048 }
3049 }
3050 #undef add_dynamic_entry
3051
3052 return TRUE;
3053 }
3054
3055 /* Finish up dynamic symbol handling. We set the contents of various
3056 dynamic sections here. */
3057
3058 static bfd_boolean
3059 elf_metag_finish_dynamic_symbol (bfd *output_bfd,
3060 struct bfd_link_info *info,
3061 struct elf_link_hash_entry *eh,
3062 Elf_Internal_Sym *sym)
3063 {
3064 struct elf_metag_link_hash_table *htab;
3065 Elf_Internal_Rela rel;
3066 bfd_byte *loc;
3067
3068 htab = metag_link_hash_table (info);
3069
3070 if (eh->plt.offset != (bfd_vma) -1)
3071 {
3072 asection *splt;
3073 asection *sgot;
3074 asection *srela;
3075
3076 bfd_vma plt_index;
3077 bfd_vma got_offset;
3078 bfd_vma got_entry;
3079
3080 if (eh->plt.offset & 1)
3081 abort ();
3082
3083 BFD_ASSERT (eh->dynindx != -1);
3084
3085 splt = htab->splt;
3086 sgot = htab->sgotplt;
3087 srela = htab->srelplt;
3088 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
3089
3090 /* Get the index in the procedure linkage table which
3091 corresponds to this symbol. This is the index of this symbol
3092 in all the symbols for which we are making plt entries. The
3093 first entry in the procedure linkage table is reserved. */
3094 plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1;
3095
3096 /* Get the offset into the .got.plt table of the entry that
3097 corresponds to this function. */
3098 got_offset = plt_index * GOT_ENTRY_SIZE;
3099
3100 BFD_ASSERT (got_offset < (1 << 16));
3101
3102 got_entry = sgot->output_section->vma
3103 + sgot->output_offset
3104 + got_offset;
3105
3106 BFD_ASSERT (plt_index < (1 << 16));
3107
3108 /* Fill in the entry in the procedure linkage table. */
3109 if (! info->shared)
3110 {
3111 bfd_put_32 (output_bfd,
3112 (plt_entry[0]
3113 | (((got_entry >> 16) & 0xffff) << 3)),
3114 splt->contents + eh->plt.offset);
3115 bfd_put_32 (output_bfd,
3116 (plt_entry[1]
3117 | ((got_entry & 0xffff) << 3)),
3118 splt->contents + eh->plt.offset + 4);
3119 bfd_put_32 (output_bfd, plt_entry[2],
3120 splt->contents + eh->plt.offset + 8);
3121 bfd_put_32 (output_bfd,
3122 (plt_entry[3] | (plt_index << 3)),
3123 splt->contents + eh->plt.offset + 12);
3124 bfd_put_32 (output_bfd,
3125 (plt_entry[4]
3126 | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3127 splt->contents + eh->plt.offset + 16);
3128 }
3129 else
3130 {
3131 bfd_vma addr = got_entry - (splt->output_section->vma +
3132 splt->output_offset + eh->plt.offset);
3133
3134 bfd_put_32 (output_bfd,
3135 plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3136 splt->contents + eh->plt.offset);
3137 bfd_put_32 (output_bfd,
3138 plt_pic_entry[1] | ((addr & 0xffff) << 3),
3139 splt->contents + eh->plt.offset + 4);
3140 bfd_put_32 (output_bfd, plt_pic_entry[2],
3141 splt->contents + eh->plt.offset + 8);
3142 bfd_put_32 (output_bfd,
3143 (plt_pic_entry[3] | (plt_index << 3)),
3144 splt->contents + eh->plt.offset + 12);
3145 bfd_put_32 (output_bfd,
3146 (plt_pic_entry[4]
3147 + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)),
3148 splt->contents + eh->plt.offset + 16);
3149 }
3150
3151 /* Fill in the entry in the global offset table. */
3152 bfd_put_32 (output_bfd,
3153 (splt->output_section->vma
3154 + splt->output_offset
3155 + eh->plt.offset
3156 + 12), /* offset within PLT entry */
3157 sgot->contents + got_offset);
3158
3159 /* Fill in the entry in the .rela.plt section. */
3160 rel.r_offset = (sgot->output_section->vma
3161 + sgot->output_offset
3162 + got_offset);
3163 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT);
3164 rel.r_addend = 0;
3165 loc = htab->srelplt->contents;
3166 loc += plt_index * sizeof(Elf32_External_Rela);
3167 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3168
3169 if (!eh->def_regular)
3170 {
3171 /* Mark the symbol as undefined, rather than as defined in
3172 the .plt section. Leave the value alone. */
3173 sym->st_shndx = SHN_UNDEF;
3174 }
3175 }
3176
3177 if (eh->got.offset != (bfd_vma) -1
3178 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0
3179 && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0)
3180 {
3181 /* This symbol has an entry in the global offset table. Set it
3182 up. */
3183
3184 rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1)
3185 + htab->sgot->output_offset
3186 + htab->sgot->output_section->vma);
3187
3188 /* If this is a -Bsymbolic link and the symbol is defined
3189 locally or was forced to be local because of a version file,
3190 we just want to emit a RELATIVE reloc. The entry in the
3191 global offset table will already have been initialized in the
3192 relocate_section function. */
3193 if (info->shared
3194 && (info->symbolic || eh->dynindx == -1)
3195 && eh->def_regular)
3196 {
3197 rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE);
3198 rel.r_addend = (eh->root.u.def.value
3199 + eh->root.u.def.section->output_offset
3200 + eh->root.u.def.section->output_section->vma);
3201 }
3202 else
3203 {
3204 if ((eh->got.offset & 1) != 0)
3205 abort ();
3206 bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset);
3207 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT);
3208 rel.r_addend = 0;
3209 }
3210
3211 loc = htab->srelgot->contents;
3212 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3213 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3214 }
3215
3216 if (eh->needs_copy)
3217 {
3218 asection *s;
3219
3220 /* This symbol needs a copy reloc. Set it up. */
3221
3222 if (! (eh->dynindx != -1
3223 && (eh->root.type == bfd_link_hash_defined
3224 || eh->root.type == bfd_link_hash_defweak)))
3225 abort ();
3226
3227 s = htab->srelbss;
3228
3229 rel.r_offset = (eh->root.u.def.value
3230 + eh->root.u.def.section->output_offset
3231 + eh->root.u.def.section->output_section->vma);
3232 rel.r_addend = 0;
3233 rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY);
3234 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3235 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
3236 }
3237
3238 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3239 if (eh->root.root.string[0] == '_'
3240 && (strcmp (eh->root.root.string, "_DYNAMIC") == 0
3241 || eh == htab->etab.hgot))
3242 {
3243 sym->st_shndx = SHN_ABS;
3244 }
3245
3246 return TRUE;
3247 }
3248
3249 /* Set the Meta ELF ABI version. */
3250
3251 static void
3252 elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info)
3253 {
3254 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
3255
3256 _bfd_elf_post_process_headers (abfd, link_info);
3257 i_ehdrp = elf_elfheader (abfd);
3258 i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION;
3259 }
3260
3261 /* Used to decide how to sort relocs in an optimal manner for the
3262 dynamic linker, before writing them out. */
3263
3264 static enum elf_reloc_type_class
3265 elf_metag_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3266 const asection *rel_sec ATTRIBUTE_UNUSED,
3267 const Elf_Internal_Rela *rela)
3268 {
3269 switch ((int) ELF32_R_TYPE (rela->r_info))
3270 {
3271 case R_METAG_RELATIVE:
3272 return reloc_class_relative;
3273 case R_METAG_JMP_SLOT:
3274 return reloc_class_plt;
3275 case R_METAG_COPY:
3276 return reloc_class_copy;
3277 default:
3278 return reloc_class_normal;
3279 }
3280 }
3281
3282 /* Finish up the dynamic sections. */
3283
3284 static bfd_boolean
3285 elf_metag_finish_dynamic_sections (bfd *output_bfd,
3286 struct bfd_link_info *info)
3287 {
3288 bfd *dynobj;
3289 struct elf_metag_link_hash_table *htab;
3290 asection *sdyn;
3291
3292 htab = metag_link_hash_table (info);
3293 dynobj = htab->etab.dynobj;
3294
3295 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3296
3297 if (htab->etab.dynamic_sections_created)
3298 {
3299 asection *splt;
3300 Elf32_External_Dyn *dyncon, *dynconend;
3301
3302 if (sdyn == NULL)
3303 abort ();
3304
3305 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3306 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3307 for (; dyncon < dynconend; dyncon++)
3308 {
3309 Elf_Internal_Dyn dyn;
3310 asection *s;
3311
3312 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3313
3314 switch (dyn.d_tag)
3315 {
3316 default:
3317 continue;
3318
3319 case DT_PLTGOT:
3320 s = htab->sgot->output_section;
3321 BFD_ASSERT (s != NULL);
3322 dyn.d_un.d_ptr = s->vma + htab->sgot->output_offset;
3323 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3324 break;
3325
3326 case DT_JMPREL:
3327 s = htab->srelplt->output_section;
3328 BFD_ASSERT (s != NULL);
3329 dyn.d_un.d_ptr = s->vma;
3330 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3331 break;
3332
3333 case DT_PLTRELSZ:
3334 s = htab->srelplt;
3335 dyn.d_un.d_val = s->size;
3336 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3337 break;
3338
3339 case DT_RELASZ:
3340 /* Don't count procedure linkage table relocs in the
3341 overall reloc count. */
3342 if (htab->srelplt) {
3343 s = htab->srelplt;
3344 dyn.d_un.d_val -= s->size;
3345 }
3346 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3347 break;
3348
3349 case DT_RELA:
3350 /* We may not be using the standard ELF linker script.
3351 If .rela.plt is the first .rela section, we adjust
3352 DT_RELA to not include it. */
3353 if (htab->srelplt) {
3354 s = htab->srelplt;
3355 if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset)
3356 dyn.d_un.d_ptr += s->size;
3357 }
3358 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3359 break;
3360 }
3361
3362 }
3363
3364 /* Fill in the first entry in the procedure linkage table. */
3365 splt = htab->splt;
3366 if (splt && splt->size > 0)
3367 {
3368 unsigned long addr;
3369 /* addr = .got + 4 */
3370 addr = htab->sgot->output_section->vma +
3371 htab->sgot->output_offset + 4;
3372 if (info->shared)
3373 {
3374 addr -= splt->output_section->vma + splt->output_offset;
3375 bfd_put_32 (output_bfd,
3376 plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3),
3377 splt->contents);
3378 bfd_put_32 (output_bfd,
3379 plt0_pic_entry[1] | ((addr & 0xffff) << 3),
3380 splt->contents + 4);
3381 bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8);
3382 bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12);
3383 bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16);
3384 }
3385 else
3386 {
3387 bfd_put_32 (output_bfd,
3388 plt0_entry[0] | (((addr >> 16) & 0xffff) << 3),
3389 splt->contents);
3390 bfd_put_32 (output_bfd,
3391 plt0_entry[1] | ((addr & 0xffff) << 3),
3392 splt->contents + 4);
3393 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
3394 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
3395 bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16);
3396 }
3397
3398 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3399 PLT_ENTRY_SIZE;
3400 }
3401 }
3402
3403 if (htab->sgot != NULL && htab->sgot->size != 0)
3404 {
3405 /* Fill in the first entry in the global offset table.
3406 We use it to point to our dynamic section, if we have one. */
3407 bfd_put_32 (output_bfd,
3408 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0,
3409 htab->sgot->contents);
3410
3411 /* The second entry is reserved for use by the dynamic linker. */
3412 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
3413
3414 /* Set .got entry size. */
3415 elf_section_data (htab->sgot->output_section)
3416 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
3417 }
3418
3419 return TRUE;
3420 }
3421
3422 /* Return the section that should be marked against GC for a given
3423 relocation. */
3424
3425 static asection *
3426 elf_metag_gc_mark_hook (asection *sec,
3427 struct bfd_link_info *info,
3428 Elf_Internal_Rela *rela,
3429 struct elf_link_hash_entry *hh,
3430 Elf_Internal_Sym *sym)
3431 {
3432 if (hh != NULL)
3433 switch ((unsigned int) ELF32_R_TYPE (rela->r_info))
3434 {
3435 case R_METAG_GNU_VTINHERIT:
3436 case R_METAG_GNU_VTENTRY:
3437 return NULL;
3438 }
3439
3440 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym);
3441 }
3442
3443 /* Update the got and plt entry reference counts for the section being
3444 removed. */
3445
3446 static bfd_boolean
3447 elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3448 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3449 asection *sec ATTRIBUTE_UNUSED,
3450 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3451 {
3452 Elf_Internal_Shdr *symtab_hdr;
3453 struct elf_link_hash_entry **eh_syms;
3454 bfd_signed_vma *local_got_refcounts;
3455 bfd_signed_vma *local_plt_refcounts;
3456 const Elf_Internal_Rela *rel, *relend;
3457
3458 if (info->relocatable)
3459 return TRUE;
3460
3461 elf_section_data (sec)->local_dynrel = NULL;
3462
3463 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3464 eh_syms = elf_sym_hashes (abfd);
3465 local_got_refcounts = elf_local_got_refcounts (abfd);
3466 local_plt_refcounts = local_got_refcounts;
3467 if (local_plt_refcounts != NULL)
3468 local_plt_refcounts += symtab_hdr->sh_info;
3469
3470 relend = relocs + sec->reloc_count;
3471 for (rel = relocs; rel < relend; rel++)
3472 {
3473 unsigned long r_symndx;
3474 unsigned int r_type;
3475 struct elf_link_hash_entry *eh = NULL;
3476
3477 r_symndx = ELF32_R_SYM (rel->r_info);
3478 if (r_symndx >= symtab_hdr->sh_info)
3479 {
3480 struct elf_metag_link_hash_entry *hh;
3481 struct elf_metag_dyn_reloc_entry **hdh_pp;
3482 struct elf_metag_dyn_reloc_entry *hdh_p;
3483
3484 eh = eh_syms[r_symndx - symtab_hdr->sh_info];
3485 while (eh->root.type == bfd_link_hash_indirect
3486 || eh->root.type == bfd_link_hash_warning)
3487 eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
3488 hh = (struct elf_metag_link_hash_entry *) eh;
3489
3490 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3491 hdh_pp = &hdh_p->hdh_next)
3492 if (hdh_p->sec == sec)
3493 {
3494 /* Everything must go for SEC. */
3495 *hdh_pp = hdh_p->hdh_next;
3496 break;
3497 }
3498 }
3499
3500 r_type = ELF32_R_TYPE (rel->r_info);
3501 switch (r_type)
3502 {
3503 case R_METAG_TLS_LDM:
3504 if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0)
3505 metag_link_hash_table (info)->tls_ldm_got.refcount -= 1;
3506 break;
3507 case R_METAG_TLS_IE:
3508 case R_METAG_TLS_GD:
3509 case R_METAG_GETSET_GOT:
3510 if (eh != NULL)
3511 {
3512 if (eh->got.refcount > 0)
3513 eh->got.refcount -= 1;
3514 }
3515 else if (local_got_refcounts != NULL)
3516 {
3517 if (local_got_refcounts[r_symndx] > 0)
3518 local_got_refcounts[r_symndx] -= 1;
3519 }
3520 break;
3521
3522 case R_METAG_RELBRANCH_PLT:
3523 if (eh != NULL)
3524 {
3525 if (eh->plt.refcount > 0)
3526 eh->plt.refcount -= 1;
3527 }
3528 break;
3529
3530 case R_METAG_ADDR32:
3531 case R_METAG_HIADDR16:
3532 case R_METAG_LOADDR16:
3533 case R_METAG_GETSETOFF:
3534 case R_METAG_RELBRANCH:
3535 if (eh != NULL)
3536 {
3537 struct elf_metag_link_hash_entry *hh;
3538 struct elf_metag_dyn_reloc_entry **hdh_pp;
3539 struct elf_metag_dyn_reloc_entry *hdh_p;
3540
3541 if (!info->shared && eh->plt.refcount > 0)
3542 eh->plt.refcount -= 1;
3543
3544 hh = (struct elf_metag_link_hash_entry *) eh;
3545
3546 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL;
3547 hdh_pp = &hdh_p->hdh_next)
3548 if (hdh_p->sec == sec)
3549 {
3550 if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH)
3551 hdh_p->relative_count -= 1;
3552 hdh_p->count -= 1;
3553 if (hdh_p->count == 0)
3554 *hdh_pp = hdh_p->hdh_next;
3555 break;
3556 }
3557 }
3558 break;
3559
3560 default:
3561 break;
3562 }
3563 }
3564
3565 return TRUE;
3566 }
3567
3568 /* Determine the type of stub needed, if any, for a call. */
3569
3570 static enum elf_metag_stub_type
3571 metag_type_of_stub (asection *input_sec,
3572 const Elf_Internal_Rela *rel,
3573 struct elf_metag_link_hash_entry *hh,
3574 bfd_vma destination,
3575 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3576 {
3577 bfd_vma location;
3578 bfd_vma branch_offset;
3579 bfd_vma max_branch_offset;
3580
3581 if (hh != NULL &&
3582 !(hh->eh.root.type == bfd_link_hash_defined
3583 || hh->eh.root.type == bfd_link_hash_defweak))
3584 return metag_stub_none;
3585
3586 /* Determine where the call point is. */
3587 location = (input_sec->output_offset
3588 + input_sec->output_section->vma
3589 + rel->r_offset);
3590
3591 branch_offset = destination - location;
3592
3593 /* Determine if a long branch stub is needed. Meta branch offsets
3594 are signed 19 bits 4 byte aligned. */
3595 max_branch_offset = (1 << (BRANCH_BITS-1)) << 2;
3596
3597 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
3598 {
3599 if (info->shared)
3600 return metag_stub_long_branch_shared;
3601 else
3602 return metag_stub_long_branch;
3603 }
3604
3605 return metag_stub_none;
3606 }
3607
3608 #define MOVT_A0_3 0x82180005
3609 #define JUMP_A0_3 0xac180003
3610
3611 #define MOVT_A1LBP 0x83080005
3612 #define ADD_A1LBP 0x83080000
3613
3614 #define ADDT_A0_3_CPC 0x82980001
3615 #define ADD_A0_3_A0_3 0x82180000
3616 #define MOV_PC_A0_3 0xa3180ca0
3617
3618 static bfd_boolean
3619 metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3620 {
3621 struct elf_metag_stub_hash_entry *hsh;
3622 asection *stub_sec;
3623 bfd *stub_bfd;
3624 bfd_byte *loc;
3625 bfd_vma sym_value;
3626 int size;
3627
3628 /* Massage our args to the form they really have. */
3629 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3630
3631 stub_sec = hsh->stub_sec;
3632
3633 /* Make a note of the offset within the stubs for this entry. */
3634 hsh->stub_offset = stub_sec->size;
3635 loc = stub_sec->contents + hsh->stub_offset;
3636
3637 stub_bfd = stub_sec->owner;
3638
3639 switch (hsh->stub_type)
3640 {
3641 case metag_stub_long_branch_shared:
3642 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3643 calculate the jump target using A0.3 as a temporary. Then a MOV
3644 to PC carries out the jump. */
3645 sym_value = (hsh->target_value
3646 + hsh->target_section->output_offset
3647 + hsh->target_section->output_section->vma
3648 + hsh->addend);
3649
3650 sym_value -= (hsh->stub_offset
3651 + stub_sec->output_offset
3652 + stub_sec->output_section->vma);
3653
3654 bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3),
3655 loc);
3656
3657 bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3),
3658 loc + 4);
3659
3660 bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8);
3661
3662 size = 12;
3663 break;
3664 case metag_stub_long_branch:
3665 /* A standard long branch stub is a MOVT instruction followed by a
3666 JUMP instruction using the A0.3 register as a temporary. This is
3667 the same method used by the LDLK linker (patch.c). */
3668 sym_value = (hsh->target_value
3669 + hsh->target_section->output_offset
3670 + hsh->target_section->output_section->vma
3671 + hsh->addend);
3672
3673 bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3),
3674 loc);
3675
3676 bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4);
3677
3678 size = 8;
3679 break;
3680 default:
3681 BFD_FAIL ();
3682 return FALSE;
3683 }
3684
3685 stub_sec->size += size;
3686 return TRUE;
3687 }
3688
3689 /* As above, but don't actually build the stub. Just bump offset so
3690 we know stub section sizes. */
3691
3692 static bfd_boolean
3693 metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
3694 {
3695 struct elf_metag_stub_hash_entry *hsh;
3696 int size = 0;
3697
3698 /* Massage our args to the form they really have. */
3699 hsh = (struct elf_metag_stub_hash_entry *) gen_entry;
3700
3701 if (hsh->stub_type == metag_stub_long_branch)
3702 size = 8;
3703 else if (hsh->stub_type == metag_stub_long_branch_shared)
3704 size = 12;
3705
3706 hsh->stub_sec->size += size;
3707 return TRUE;
3708 }
3709
3710 /* Set up various things so that we can make a list of input sections
3711 for each output section included in the link. Returns -1 on error,
3712 0 when no stubs will be needed, and 1 on success. */
3713
3714 int
3715 elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
3716 {
3717 bfd *input_bfd;
3718 unsigned int bfd_count;
3719 int top_id, top_index;
3720 asection *section;
3721 asection **input_list, **list;
3722 bfd_size_type amt;
3723 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3724
3725 /* Count the number of input BFDs and find the top input section id. */
3726 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3727 input_bfd != NULL;
3728 input_bfd = input_bfd->link_next)
3729 {
3730 bfd_count += 1;
3731 for (section = input_bfd->sections;
3732 section != NULL;
3733 section = section->next)
3734 {
3735 if (top_id < section->id)
3736 top_id = section->id;
3737 }
3738 }
3739
3740 htab->bfd_count = bfd_count;
3741
3742 amt = sizeof (struct map_stub) * (top_id + 1);
3743 htab->stub_group = bfd_zmalloc (amt);
3744 if (htab->stub_group == NULL)
3745 return -1;
3746
3747 /* We can't use output_bfd->section_count here to find the top output
3748 section index as some sections may have been removed, and
3749 strip_excluded_output_sections doesn't renumber the indices. */
3750 for (section = output_bfd->sections, top_index = 0;
3751 section != NULL;
3752 section = section->next)
3753 {
3754 if (top_index < section->index)
3755 top_index = section->index;
3756 }
3757
3758 htab->top_index = top_index;
3759 amt = sizeof (asection *) * (top_index + 1);
3760 input_list = bfd_malloc (amt);
3761 htab->input_list = input_list;
3762 if (input_list == NULL)
3763 return -1;
3764
3765 /* For sections we aren't interested in, mark their entries with a
3766 value we can check later. */
3767 list = input_list + top_index;
3768 do
3769 *list = bfd_abs_section_ptr;
3770 while (list-- != input_list);
3771
3772 for (section = output_bfd->sections;
3773 section != NULL;
3774 section = section->next)
3775 {
3776 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3777 * have PC relative relocs in them but no code flag set. */
3778 if (((section->flags & SEC_CODE) != 0) ||
3779 strcmp(".ctors", section->name) ||
3780 strcmp(".dtors", section->name))
3781 input_list[section->index] = NULL;
3782 }
3783
3784 return 1;
3785 }
3786
3787 /* The linker repeatedly calls this function for each input section,
3788 in the order that input sections are linked into output sections.
3789 Build lists of input sections to determine groupings between which
3790 we may insert linker stubs. */
3791
3792 void
3793 elf_metag_next_input_section (struct bfd_link_info *info, asection *isec)
3794 {
3795 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3796
3797 if (isec->output_section->index <= htab->top_index)
3798 {
3799 asection **list = htab->input_list + isec->output_section->index;
3800 if (*list != bfd_abs_section_ptr)
3801 {
3802 /* Steal the link_sec pointer for our list. */
3803 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3804 /* This happens to make the list in reverse order,
3805 which is what we want. */
3806 PREV_SEC (isec) = *list;
3807 *list = isec;
3808 }
3809 }
3810 }
3811
3812 /* See whether we can group stub sections together. Grouping stub
3813 sections may result in fewer stubs. More importantly, we need to
3814 put all .init* and .fini* stubs at the beginning of the .init or
3815 .fini output sections respectively, because glibc splits the
3816 _init and _fini functions into multiple parts. Putting a stub in
3817 the middle of a function is not a good idea. */
3818
3819 static void
3820 group_sections (struct elf_metag_link_hash_table *htab,
3821 bfd_size_type stub_group_size,
3822 bfd_boolean stubs_always_before_branch)
3823 {
3824 asection **list = htab->input_list + htab->top_index;
3825 do
3826 {
3827 asection *tail = *list;
3828 if (tail == bfd_abs_section_ptr)
3829 continue;
3830 while (tail != NULL)
3831 {
3832 asection *curr;
3833 asection *prev;
3834 bfd_size_type total;
3835 bfd_boolean big_sec;
3836
3837 curr = tail;
3838 total = tail->size;
3839 big_sec = total >= stub_group_size;
3840
3841 while ((prev = PREV_SEC (curr)) != NULL
3842 && ((total += curr->output_offset - prev->output_offset)
3843 < stub_group_size))
3844 curr = prev;
3845
3846 /* OK, the size from the start of CURR to the end is less
3847 than stub_group_size bytes and thus can be handled by one stub
3848 section. (or the tail section is itself larger than
3849 stub_group_size bytes, in which case we may be toast.)
3850 We should really be keeping track of the total size of
3851 stubs added here, as stubs contribute to the final output
3852 section size. */
3853 do
3854 {
3855 prev = PREV_SEC (tail);
3856 /* Set up this stub group. */
3857 htab->stub_group[tail->id].link_sec = curr;
3858 }
3859 while (tail != curr && (tail = prev) != NULL);
3860
3861 /* But wait, there's more! Input sections up to stub_group_size
3862 bytes before the stub section can be handled by it too.
3863 Don't do this if we have a really large section after the
3864 stubs, as adding more stubs increases the chance that
3865 branches may not reach into the stub section. */
3866 if (!stubs_always_before_branch && !big_sec)
3867 {
3868 total = 0;
3869 while (prev != NULL
3870 && ((total += tail->output_offset - prev->output_offset)
3871 < stub_group_size))
3872 {
3873 tail = prev;
3874 prev = PREV_SEC (tail);
3875 htab->stub_group[tail->id].link_sec = curr;
3876 }
3877 }
3878 tail = prev;
3879 }
3880 }
3881 while (list-- != htab->input_list);
3882 free (htab->input_list);
3883 #undef PREV_SEC
3884 }
3885
3886 /* Read in all local syms for all input bfds.
3887 Returns -1 on error, 0 otherwise. */
3888
3889 static int
3890 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
3891 struct bfd_link_info *info)
3892 {
3893 unsigned int bfd_indx;
3894 Elf_Internal_Sym *local_syms, **all_local_syms;
3895 int stub_changed = 0;
3896 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3897
3898 /* We want to read in symbol extension records only once. To do this
3899 we need to read in the local symbols in parallel and save them for
3900 later use; so hold pointers to the local symbols in an array. */
3901 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
3902 all_local_syms = bfd_zmalloc (amt);
3903 htab->all_local_syms = all_local_syms;
3904 if (all_local_syms == NULL)
3905 return -1;
3906
3907 /* Walk over all the input BFDs, swapping in local symbols. */
3908 for (bfd_indx = 0;
3909 input_bfd != NULL;
3910 input_bfd = input_bfd->link_next, bfd_indx++)
3911 {
3912 Elf_Internal_Shdr *symtab_hdr;
3913
3914 /* We'll need the symbol table in a second. */
3915 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3916 if (symtab_hdr->sh_info == 0)
3917 continue;
3918
3919 /* We need an array of the local symbols attached to the input bfd. */
3920 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
3921 if (local_syms == NULL)
3922 {
3923 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3924 symtab_hdr->sh_info, 0,
3925 NULL, NULL, NULL);
3926 /* Cache them for elf_link_input_bfd. */
3927 symtab_hdr->contents = (unsigned char *) local_syms;
3928 }
3929 if (local_syms == NULL)
3930 return -1;
3931
3932 all_local_syms[bfd_indx] = local_syms;
3933 }
3934
3935 return stub_changed;
3936 }
3937
3938 /* Determine and set the size of the stub section for a final link.
3939
3940 The basic idea here is to examine all the relocations looking for
3941 PC-relative calls to a target that is unreachable with a "CALLR"
3942 instruction. */
3943
3944 /* See elf32-hppa.c and elf64-ppc.c. */
3945
3946 bfd_boolean
3947 elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd,
3948 struct bfd_link_info *info,
3949 bfd_signed_vma group_size,
3950 asection * (*add_stub_section) (const char *, asection *),
3951 void (*layout_sections_again) (void))
3952 {
3953 bfd_size_type stub_group_size;
3954 bfd_boolean stubs_always_before_branch;
3955 bfd_boolean stub_changed;
3956 struct elf_metag_link_hash_table *htab = metag_link_hash_table (info);
3957
3958 /* Stash our params away. */
3959 htab->stub_bfd = stub_bfd;
3960 htab->add_stub_section = add_stub_section;
3961 htab->layout_sections_again = layout_sections_again;
3962 stubs_always_before_branch = group_size < 0;
3963 if (group_size < 0)
3964 stub_group_size = -group_size;
3965 else
3966 stub_group_size = group_size;
3967 if (stub_group_size == 1)
3968 {
3969 /* Default values. */
3970 /* FIXME: not sure what these values should be */
3971 if (stubs_always_before_branch)
3972 {
3973 stub_group_size = (1 << BRANCH_BITS);
3974 }
3975 else
3976 {
3977 stub_group_size = (1 << BRANCH_BITS);
3978 }
3979 }
3980
3981 group_sections (htab, stub_group_size, stubs_always_before_branch);
3982
3983 switch (get_local_syms (output_bfd, info->input_bfds, info))
3984 {
3985 default:
3986 if (htab->all_local_syms)
3987 goto error_ret_free_local;
3988 return FALSE;
3989
3990 case 0:
3991 stub_changed = FALSE;
3992 break;
3993
3994 case 1:
3995 stub_changed = TRUE;
3996 break;
3997 }
3998
3999 while (1)
4000 {
4001 bfd *input_bfd;
4002 unsigned int bfd_indx;
4003 asection *stub_sec;
4004
4005 for (input_bfd = info->input_bfds, bfd_indx = 0;
4006 input_bfd != NULL;
4007 input_bfd = input_bfd->link_next, bfd_indx++)
4008 {
4009 Elf_Internal_Shdr *symtab_hdr;
4010 asection *section;
4011 Elf_Internal_Sym *local_syms;
4012
4013 /* We'll need the symbol table in a second. */
4014 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4015 if (symtab_hdr->sh_info == 0)
4016 continue;
4017
4018 local_syms = htab->all_local_syms[bfd_indx];
4019
4020 /* Walk over each section attached to the input bfd. */
4021 for (section = input_bfd->sections;
4022 section != NULL;
4023 section = section->next)
4024 {
4025 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4026
4027 /* If there aren't any relocs, then there's nothing more
4028 to do. */
4029 if ((section->flags & SEC_RELOC) == 0
4030 || section->reloc_count == 0)
4031 continue;
4032
4033 /* If this section is a link-once section that will be
4034 discarded, then don't create any stubs. */
4035 if (section->output_section == NULL
4036 || section->output_section->owner != output_bfd)
4037 continue;
4038
4039 /* Get the relocs. */
4040 internal_relocs
4041 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
4042 info->keep_memory);
4043 if (internal_relocs == NULL)
4044 goto error_ret_free_local;
4045
4046 /* Now examine each relocation. */
4047 irela = internal_relocs;
4048 irelaend = irela + section->reloc_count;
4049 for (; irela < irelaend; irela++)
4050 {
4051 unsigned int r_type, r_indx;
4052 enum elf_metag_stub_type stub_type;
4053 struct elf_metag_stub_hash_entry *hsh;
4054 asection *sym_sec;
4055 bfd_vma sym_value;
4056 bfd_vma destination;
4057 struct elf_metag_link_hash_entry *hh;
4058 char *stub_name;
4059 const asection *id_sec;
4060
4061 r_type = ELF32_R_TYPE (irela->r_info);
4062 r_indx = ELF32_R_SYM (irela->r_info);
4063
4064 if (r_type >= (unsigned int) R_METAG_MAX)
4065 {
4066 bfd_set_error (bfd_error_bad_value);
4067 error_ret_free_internal:
4068 if (elf_section_data (section)->relocs == NULL)
4069 free (internal_relocs);
4070 goto error_ret_free_local;
4071 }
4072
4073 /* Only look for stubs on CALLR and B instructions. */
4074 if (!(r_type == (unsigned int) R_METAG_RELBRANCH ||
4075 r_type == (unsigned int) R_METAG_RELBRANCH_PLT))
4076 continue;
4077
4078 /* Now determine the call target, its name, value,
4079 section. */
4080 sym_sec = NULL;
4081 sym_value = 0;
4082 destination = 0;
4083 hh = NULL;
4084 if (r_indx < symtab_hdr->sh_info)
4085 {
4086 /* It's a local symbol. */
4087 Elf_Internal_Sym *sym;
4088 Elf_Internal_Shdr *hdr;
4089 unsigned int shndx;
4090
4091 sym = local_syms + r_indx;
4092 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4093 sym_value = sym->st_value;
4094 shndx = sym->st_shndx;
4095 if (shndx < elf_numsections (input_bfd))
4096 {
4097 hdr = elf_elfsections (input_bfd)[shndx];
4098 sym_sec = hdr->bfd_section;
4099 destination = (sym_value + irela->r_addend
4100 + sym_sec->output_offset
4101 + sym_sec->output_section->vma);
4102 }
4103 }
4104 else
4105 {
4106 /* It's an external symbol. */
4107 int e_indx;
4108
4109 e_indx = r_indx - symtab_hdr->sh_info;
4110 hh = ((struct elf_metag_link_hash_entry *)
4111 elf_sym_hashes (input_bfd)[e_indx]);
4112
4113 while (hh->eh.root.type == bfd_link_hash_indirect
4114 || hh->eh.root.type == bfd_link_hash_warning)
4115 hh = ((struct elf_metag_link_hash_entry *)
4116 hh->eh.root.u.i.link);
4117
4118 if (hh->eh.root.type == bfd_link_hash_defined
4119 || hh->eh.root.type == bfd_link_hash_defweak)
4120 {
4121 sym_sec = hh->eh.root.u.def.section;
4122 sym_value = hh->eh.root.u.def.value;
4123 if (hh->eh.plt.offset != (bfd_vma) -1
4124 && hh->eh.dynindx != -1
4125 && r_type == (unsigned int) R_METAG_RELBRANCH_PLT)
4126 {
4127 sym_sec = htab->splt;
4128 sym_value = hh->eh.plt.offset;
4129 }
4130
4131 if (sym_sec->output_section != NULL)
4132 destination = (sym_value + irela->r_addend
4133 + sym_sec->output_offset
4134 + sym_sec->output_section->vma);
4135 else
4136 continue;
4137 }
4138 else if (hh->eh.root.type == bfd_link_hash_undefweak)
4139 {
4140 if (! info->shared)
4141 continue;
4142 }
4143 else if (hh->eh.root.type == bfd_link_hash_undefined)
4144 {
4145 if (! (info->unresolved_syms_in_objects == RM_IGNORE
4146 && (ELF_ST_VISIBILITY (hh->eh.other)
4147 == STV_DEFAULT)))
4148 continue;
4149 }
4150 else
4151 {
4152 bfd_set_error (bfd_error_bad_value);
4153 goto error_ret_free_internal;
4154 }
4155 }
4156
4157 /* Determine what (if any) linker stub is needed. */
4158 stub_type = metag_type_of_stub (section, irela, hh,
4159 destination, info);
4160 if (stub_type == metag_stub_none)
4161 continue;
4162
4163 /* Support for grouping stub sections. */
4164 id_sec = htab->stub_group[section->id].link_sec;
4165
4166 /* Get the name of this stub. */
4167 stub_name = metag_stub_name (id_sec, sym_sec, hh, irela);
4168 if (!stub_name)
4169 goto error_ret_free_internal;
4170
4171 hsh = metag_stub_hash_lookup (&htab->bstab,
4172 stub_name,
4173 FALSE, FALSE);
4174 if (hsh != NULL)
4175 {
4176 /* The proper stub has already been created. */
4177 free (stub_name);
4178 continue;
4179 }
4180
4181 hsh = metag_add_stub (stub_name, section, htab);
4182 if (hsh == NULL)
4183 {
4184 free (stub_name);
4185 goto error_ret_free_internal;
4186 }
4187 hsh->target_value = sym_value;
4188 hsh->target_section = sym_sec;
4189 hsh->stub_type = stub_type;
4190 hsh->hh = hh;
4191 hsh->addend = irela->r_addend;
4192 stub_changed = TRUE;
4193 }
4194
4195 /* We're done with the internal relocs, free them. */
4196 if (elf_section_data (section)->relocs == NULL)
4197 free (internal_relocs);
4198 }
4199 }
4200
4201 if (!stub_changed)
4202 break;
4203
4204 /* OK, we've added some stubs. Find out the new size of the
4205 stub sections. */
4206 for (stub_sec = htab->stub_bfd->sections;
4207 stub_sec != NULL;
4208 stub_sec = stub_sec->next)
4209 stub_sec->size = 0;
4210
4211 bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab);
4212
4213 /* Ask the linker to do its stuff. */
4214 (*htab->layout_sections_again) ();
4215 stub_changed = FALSE;
4216 }
4217
4218 free (htab->all_local_syms);
4219 return TRUE;
4220
4221 error_ret_free_local:
4222 free (htab->all_local_syms);
4223 return FALSE;
4224 }
4225
4226 /* Build all the stubs associated with the current output file. The
4227 stubs are kept in a hash table attached to the main linker hash
4228 table. This function is called via metagelf_finish in the linker. */
4229
4230 bfd_boolean
4231 elf_metag_build_stubs (struct bfd_link_info *info)
4232 {
4233 asection *stub_sec;
4234 struct bfd_hash_table *table;
4235 struct elf_metag_link_hash_table *htab;
4236
4237 htab = metag_link_hash_table (info);
4238
4239 for (stub_sec = htab->stub_bfd->sections;
4240 stub_sec != NULL;
4241 stub_sec = stub_sec->next)
4242 {
4243 bfd_size_type size;
4244
4245 /* Allocate memory to hold the linker stubs. */
4246 size = stub_sec->size;
4247 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4248 if (stub_sec->contents == NULL && size != 0)
4249 return FALSE;
4250 stub_sec->size = 0;
4251 }
4252
4253 /* Build the stubs as directed by the stub hash table. */
4254 table = &htab->bstab;
4255 bfd_hash_traverse (table, metag_build_one_stub, info);
4256
4257 return TRUE;
4258 }
4259
4260 /* Return TRUE if SYM represents a local label symbol. */
4261
4262 static bfd_boolean
4263 elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
4264 {
4265 if (name[0] == '$' && name[1] == 'L')
4266 return 1;
4267 return _bfd_elf_is_local_label_name (abfd, name);
4268 }
4269
4270 /* Return address for Ith PLT stub in section PLT, for relocation REL
4271 or (bfd_vma) -1 if it should not be included. */
4272
4273 static bfd_vma
4274 elf_metag_plt_sym_val (bfd_vma i, const asection *plt,
4275 const arelent *rel ATTRIBUTE_UNUSED)
4276 {
4277 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4278 }
4279
4280 #define ELF_ARCH bfd_arch_metag
4281 #define ELF_TARGET_ID METAG_ELF_DATA
4282 #define ELF_MACHINE_CODE EM_METAG
4283 #define ELF_MINPAGESIZE 0x1000
4284 #define ELF_MAXPAGESIZE 0x4000
4285 #define ELF_COMMONPAGESIZE 0x1000
4286
4287 #define TARGET_LITTLE_SYM bfd_elf32_metag_vec
4288 #define TARGET_LITTLE_NAME "elf32-metag"
4289
4290 #define elf_symbol_leading_char '_'
4291
4292 #define elf_info_to_howto_rel NULL
4293 #define elf_info_to_howto metag_info_to_howto_rela
4294
4295 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4296 #define bfd_elf32_bfd_link_hash_table_create \
4297 elf_metag_link_hash_table_create
4298 #define bfd_elf32_bfd_link_hash_table_free elf_metag_link_hash_table_free
4299 #define elf_backend_relocate_section elf_metag_relocate_section
4300 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4301 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4302 #define elf_backend_check_relocs elf_metag_check_relocs
4303 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4304 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4305 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4306 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4307 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4308 #define elf_backend_omit_section_dynsym \
4309 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4310 #define elf_backend_post_process_headers elf_metag_post_process_headers
4311 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4312 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4313 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4314
4315 #define elf_backend_can_gc_sections 1
4316 #define elf_backend_can_refcount 1
4317 #define elf_backend_got_header_size 12
4318 #define elf_backend_rela_normal 1
4319 #define elf_backend_want_got_sym 0
4320 #define elf_backend_want_plt_sym 0
4321 #define elf_backend_plt_readonly 1
4322
4323 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4324 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4325
4326 #include "elf32-target.h"
The GNU Binutils are a collection of binary tools.