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opcodes: handle mach-o for thumb/arm disambiguation.
[binutils-gdb.git] / bfd / elf32-or1k.c
blob556a9ac606f2d4d388091d319bd6b587ed16f9de
1 /* Or1k-specific support for 32-bit ELF.
2 Copyright (C) 2001-2015 Free Software Foundation, Inc.
3 Contributed for OR32 by Johan Rydberg, jrydberg@opencores.org
4
5 PIC parts added by Stefan Kristiansson, stefan.kristiansson@saunalahti.fi,
6 largely based on elf32-m32r.c and elf32-microblaze.c.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, see <http://www.gnu.org/licenses/>. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/or1k.h"
28 #include "libiberty.h"
29
30 #define PLT_ENTRY_SIZE 20
31
32 #define PLT0_ENTRY_WORD0 0x19800000 /* l.movhi r12, 0 <- hi(.got+4) */
33 #define PLT0_ENTRY_WORD1 0xa98c0000 /* l.ori r12, r12, 0 <- lo(.got+4) */
34 #define PLT0_ENTRY_WORD2 0x85ec0004 /* l.lwz r15, 4(r12) <- *(.got+8)*/
35 #define PLT0_ENTRY_WORD3 0x44007800 /* l.jr r15 */
36 #define PLT0_ENTRY_WORD4 0x858c0000 /* l.lwz r12, 0(r12) */
37
38 #define PLT0_PIC_ENTRY_WORD0 0x85900004 /* l.lwz r12, 4(r16) */
39 #define PLT0_PIC_ENTRY_WORD1 0x85f00008 /* l.lwz r15, 8(r16) */
40 #define PLT0_PIC_ENTRY_WORD2 0x44007800 /* l.jr r15 */
41 #define PLT0_PIC_ENTRY_WORD3 0x15000000 /* l.nop */
42 #define PLT0_PIC_ENTRY_WORD4 0x15000000 /* l.nop */
43
44 #define PLT_ENTRY_WORD0 0x19800000 /* l.movhi r12, 0 <- hi(got idx addr) */
45 #define PLT_ENTRY_WORD1 0xa98c0000 /* l.ori r12, r12, 0 <- lo(got idx addr) */
46 #define PLT_ENTRY_WORD2 0x858c0000 /* l.lwz r12, 0(r12) */
47 #define PLT_ENTRY_WORD3 0x44006000 /* l.jr r12 */
48 #define PLT_ENTRY_WORD4 0xa9600000 /* l.ori r11, r0, 0 <- reloc offset */
49
50 #define PLT_PIC_ENTRY_WORD0 0x85900000 /* l.lwz r12, 0(r16) <- index in got */
51 #define PLT_PIC_ENTRY_WORD1 0xa9600000 /* l.ori r11, r0, 0 <- reloc offset */
52 #define PLT_PIC_ENTRY_WORD2 0x44006000 /* l.jr r12 */
53 #define PLT_PIC_ENTRY_WORD3 0x15000000 /* l.nop */
54 #define PLT_PIC_ENTRY_WORD4 0x15000000 /* l.nop */
55
56 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
57
58 static reloc_howto_type or1k_elf_howto_table[] =
59 {
60 /* This reloc does nothing. */
61 HOWTO (R_OR1K_NONE, /* type */
62 0, /* rightshift */
63 3, /* size (0 = byte, 1 = short, 2 = long) */
64 0, /* bitsize */
65 FALSE, /* pc_relative */
66 0, /* bitpos */
67 complain_overflow_dont, /* complain_on_overflow */
68 bfd_elf_generic_reloc, /* special_function */
69 "R_OR1K_NONE", /* name */
70 FALSE, /* partial_inplace */
71 0, /* src_mask */
72 0, /* dst_mask */
73 FALSE), /* pcrel_offset */
74
75 HOWTO (R_OR1K_32,
76 0, /* rightshift */
77 2, /* size (0 = byte, 1 = short, 2 = long) */
78 32, /* bitsize */
79 FALSE, /* pc_relative */
80 0, /* bitpos */
81 complain_overflow_unsigned, /* complain_on_overflow */
82 bfd_elf_generic_reloc, /* special_function */
83 "R_OR1K_32", /* name */
84 FALSE, /* partial_inplace */
85 0, /* src_mask */
86 0xffffffff, /* dst_mask */
87 FALSE), /* pcrel_offset */
88
89 HOWTO (R_OR1K_16,
90 0, /* rightshift */
91 1, /* size (0 = byte, 1 = short, 2 = long) */
92 16, /* bitsize */
93 FALSE, /* pc_relative */
94 0, /* bitpos */
95 complain_overflow_unsigned, /* complain_on_overflow */
96 bfd_elf_generic_reloc, /* special_function */
97 "R_OR1K_16", /* name */
98 FALSE, /* partial_inplace */
99 0, /* src_mask */
100 0xffff, /* dst_mask */
101 FALSE), /* pcrel_offset */
102
103 HOWTO (R_OR1K_8,
104 0, /* rightshift */
105 0, /* size (0 = byte, 1 = short, 2 = long) */
106 8, /* bitsize */
107 FALSE, /* pc_relative */
108 0, /* bitpos */
109 complain_overflow_unsigned, /* complain_on_overflow */
110 bfd_elf_generic_reloc, /* special_function */
111 "R_OR1K_8", /* name */
112 FALSE, /* partial_inplace */
113 0, /* src_mask */
114 0xff, /* dst_mask */
115 FALSE), /* pcrel_offset */
116
117 HOWTO (R_OR1K_LO_16_IN_INSN, /* type */
118 0, /* rightshift */
119 2, /* size (0 = byte, 1 = short, 2 = long) */
120 16, /* bitsize */
121 FALSE, /* pc_relative */
122 0, /* bitpos */
123 complain_overflow_dont, /* complain_on_overflow */
124 bfd_elf_generic_reloc, /* special_function */
125 "R_OR1K_LO_16_IN_INSN", /* name */
126 FALSE, /* partial_inplace */
127 0, /* src_mask */
128 0x0000ffff, /* dst_mask */
129 FALSE), /* pcrel_offset */
130
131 HOWTO (R_OR1K_HI_16_IN_INSN, /* type */
132 16, /* rightshift */
133 2, /* size (0 = byte, 1 = short, 2 = long) */
134 16, /* bitsize */
135 FALSE, /* pc_relative */
136 0, /* bitpos */
137 complain_overflow_dont, /* complain_on_overflow */
138 bfd_elf_generic_reloc, /* special_function */
139 "R_OR1K_HI_16_IN_INSN", /* name */
140 FALSE, /* partial_inplace */
141 0, /* src_mask */
142 0x0000ffff, /* dst_mask */
143 FALSE), /* pcrel_offset */
144
145 /* A PC relative 26 bit relocation, right shifted by 2. */
146 HOWTO (R_OR1K_INSN_REL_26, /* type */
147 2, /* rightshift */
148 2, /* size (0 = byte, 1 = short, 2 = long) */
149 26, /* bitsize */
150 TRUE, /* pc_relative */
151 0, /* bitpos */
152 complain_overflow_signed, /* complain_on_overflow */
153 bfd_elf_generic_reloc, /* special_function */
154 "R_OR1K_INSN_REL_26", /* name */
155 FALSE, /* partial_inplace */
156 0, /* src_mask */
157 0x03ffffff, /* dst_mask */
158 TRUE), /* pcrel_offset */
159
160 /* GNU extension to record C++ vtable hierarchy. */
161 HOWTO (R_OR1K_GNU_VTINHERIT, /* type */
162 0, /* rightshift */
163 2, /* size (0 = byte, 1 = short, 2 = long) */
164 0, /* bitsize */
165 FALSE, /* pc_relative */
166 0, /* bitpos */
167 complain_overflow_dont, /* complain_on_overflow */
168 NULL, /* special_function */
169 "R_OR1K_GNU_VTINHERIT", /* name */
170 FALSE, /* partial_inplace */
171 0, /* src_mask */
172 0, /* dst_mask */
173 FALSE), /* pcrel_offset */
174
175 /* GNU extension to record C++ vtable member usage. */
176 HOWTO (R_OR1K_GNU_VTENTRY, /* type */
177 0, /* rightshift */
178 2, /* size (0 = byte, 1 = short, 2 = long) */
179 0, /* bitsize */
180 FALSE, /* pc_relative */
181 0, /* bitpos */
182 complain_overflow_dont, /* complain_on_overflow */
183 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
184 "R_OR1K_GNU_VTENTRY", /* name */
185 FALSE, /* partial_inplace */
186 0, /* src_mask */
187 0, /* dst_mask */
188 FALSE), /* pcrel_offset */
189
190 HOWTO (R_OR1K_32_PCREL,
191 0, /* rightshift */
192 2, /* size (0 = byte, 1 = short, 2 = long) */
193 32, /* bitsize */
194 TRUE, /* pc_relative */
195 0, /* bitpos */
196 complain_overflow_signed, /* complain_on_overflow */
197 bfd_elf_generic_reloc, /* special_function */
198 "R_OR1K_32_PCREL", /* name */
199 FALSE, /* partial_inplace */
200 0, /* src_mask */
201 0xffffffff, /* dst_mask */
202 TRUE), /* pcrel_offset */
203
204 HOWTO (R_OR1K_16_PCREL,
205 0, /* rightshift */
206 1, /* size (0 = byte, 1 = short, 2 = long) */
207 16, /* bitsize */
208 TRUE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_signed, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_OR1K_16_PCREL", /* name */
213 FALSE, /* partial_inplace */
214 0, /* src_mask */
215 0xffff, /* dst_mask */
216 TRUE), /* pcrel_offset */
217
218 HOWTO (R_OR1K_8_PCREL,
219 0, /* rightshift */
220 0, /* size (0 = byte, 1 = short, 2 = long) */
221 8, /* bitsize */
222 TRUE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_signed, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_OR1K_8_PCREL", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0xff, /* dst_mask */
230 TRUE), /* pcrel_offset */
231
232 HOWTO (R_OR1K_GOTPC_HI16, /* Type. */
233 16, /* Rightshift. */
234 2, /* Size (0 = byte, 1 = short, 2 = long). */
235 16, /* Bitsize. */
236 TRUE, /* PC_relative. */
237 0, /* Bitpos. */
238 complain_overflow_dont, /* Complain on overflow. */
239 bfd_elf_generic_reloc, /* Special Function. */
240 "R_OR1K_GOTPC_HI16", /* Name. */
241 FALSE, /* Partial Inplace. */
242 0, /* Source Mask. */
243 0xffff, /* Dest Mask. */
244 TRUE), /* PC relative offset? */
245
246 HOWTO (R_OR1K_GOTPC_LO16, /* Type. */
247 0, /* Rightshift. */
248 2, /* Size (0 = byte, 1 = short, 2 = long). */
249 16, /* Bitsize. */
250 TRUE, /* PC_relative. */
251 0, /* Bitpos. */
252 complain_overflow_dont, /* Complain on overflow. */
253 bfd_elf_generic_reloc, /* Special Function. */
254 "R_OR1K_GOTPC_LO16", /* Name. */
255 FALSE, /* Partial Inplace. */
256 0, /* Source Mask. */
257 0xffff, /* Dest Mask. */
258 TRUE), /* PC relative offset? */
259
260 HOWTO (R_OR1K_GOT16, /* type */
261 0, /* rightshift */
262 2, /* size (0 = byte, 1 = short, 2 = long) */
263 16, /* bitsize */
264 FALSE, /* pc_relative */
265 0, /* bitpos */
266 complain_overflow_signed, /* complain_on_overflow */
267 bfd_elf_generic_reloc, /* special_function */
268 "R_OR1K_GOT16", /* name */
269 FALSE, /* partial_inplace */
270 0, /* src_mask */
271 0xffff, /* dst_mask */
272 FALSE), /* pcrel_offset */
273
274 /* A 26 bit PLT relocation. Shifted by 2. */
275 HOWTO (R_OR1K_PLT26, /* Type. */
276 2, /* Rightshift. */
277 2, /* Size (0 = byte, 1 = short, 2 = long). */
278 26, /* Bitsize. */
279 TRUE, /* PC_relative. */
280 0, /* Bitpos. */
281 complain_overflow_dont, /* Complain on overflow. */
282 bfd_elf_generic_reloc,/* Special Function. */
283 "R_OR1K_PLT26", /* Name. */
284 FALSE, /* Partial Inplace. */
285 0, /* Source Mask. */
286 0x03ffffff, /* Dest Mask. */
287 TRUE), /* PC relative offset? */
288
289 HOWTO (R_OR1K_GOTOFF_HI16, /* type */
290 16, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 16, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_dont, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_OR1K_GOTOFF_HI16", /* name */
298 FALSE, /* partial_inplace */
299 0x0, /* src_mask */
300 0xffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 HOWTO (R_OR1K_GOTOFF_LO16, /* type */
304 0, /* rightshift */
305 2, /* size (0 = byte, 1 = short, 2 = long) */
306 16, /* bitsize */
307 FALSE, /* pc_relative */
308 0, /* bitpos */
309 complain_overflow_dont, /* complain_on_overflow */
310 bfd_elf_generic_reloc, /* special_function */
311 "R_OR1K_GOTOFF_LO16", /* name */
312 FALSE, /* partial_inplace */
313 0x0, /* src_mask */
314 0xffff, /* dst_mask */
315 FALSE), /* pcrel_offset */
316
317 HOWTO (R_OR1K_COPY, /* type */
318 0, /* rightshift */
319 2, /* size (0 = byte, 1 = short, 2 = long) */
320 32, /* bitsize */
321 FALSE, /* pc_relative */
322 0, /* bitpos */
323 complain_overflow_bitfield, /* complain_on_overflow */
324 bfd_elf_generic_reloc, /* special_function */
325 "R_OR1K_COPY", /* name */
326 FALSE, /* partial_inplace */
327 0xffffffff, /* src_mask */
328 0xffffffff, /* dst_mask */
329 FALSE), /* pcrel_offset */
330
331 HOWTO (R_OR1K_GLOB_DAT, /* type */
332 0, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 32, /* bitsize */
335 FALSE, /* pc_relative */
336 0, /* bitpos */
337 complain_overflow_bitfield, /* complain_on_overflow */
338 bfd_elf_generic_reloc, /* special_function */
339 "R_OR1K_GLOB_DAT", /* name */
340 FALSE, /* partial_inplace */
341 0xffffffff, /* src_mask */
342 0xffffffff, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 HOWTO (R_OR1K_JMP_SLOT, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 32, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_bitfield, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_OR1K_JMP_SLOT", /* name */
354 FALSE, /* partial_inplace */
355 0xffffffff, /* src_mask */
356 0xffffffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 HOWTO (R_OR1K_RELATIVE, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 32, /* bitsize */
363 FALSE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_bitfield, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_OR1K_RELATIVE", /* name */
368 FALSE, /* partial_inplace */
369 0xffffffff, /* src_mask */
370 0xffffffff, /* dst_mask */
371 FALSE), /* pcrel_offset */
372
373 HOWTO (R_OR1K_TLS_GD_HI16, /* type */
374 16, /* rightshift */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
376 16, /* bitsize */
377 FALSE, /* pc_relative */
378 0, /* bitpos */
379 complain_overflow_dont, /* complain_on_overflow */
380 bfd_elf_generic_reloc, /* special_function */
381 "R_OR1K_TLS_GD_HI16", /* name */
382 FALSE, /* partial_inplace */
383 0x0, /* src_mask */
384 0xffff, /* dst_mask */
385 FALSE), /* pcrel_offset */
386
387 HOWTO (R_OR1K_TLS_GD_LO16, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_dont, /* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_OR1K_TLS_GD_LO16", /* name */
396 FALSE, /* partial_inplace */
397 0x0, /* src_mask */
398 0xffff, /* dst_mask */
399 FALSE), /* pcrel_offset */
400
401 HOWTO (R_OR1K_TLS_LDM_HI16, /* type */
402 16, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_OR1K_TLS_LDM_HI16", /* name */
410 FALSE, /* partial_inplace */
411 0x0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 HOWTO (R_OR1K_TLS_LDM_LO16, /* type */
416 0, /* rightshift */
417 2, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_dont, /* complain_on_overflow */
422 bfd_elf_generic_reloc, /* special_function */
423 "R_OR1K_TLS_LDM_LO16", /* name */
424 FALSE, /* partial_inplace */
425 0x0, /* src_mask */
426 0xffff, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 HOWTO (R_OR1K_TLS_LDO_HI16, /* type */
430 16, /* rightshift */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_dont, /* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_OR1K_TLS_LDO_HI16", /* name */
438 FALSE, /* partial_inplace */
439 0x0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 HOWTO (R_OR1K_TLS_LDO_LO16, /* type */
444 0, /* rightshift */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 bfd_elf_generic_reloc, /* special_function */
451 "R_OR1K_TLS_LDO_LO16", /* name */
452 FALSE, /* partial_inplace */
453 0x0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 HOWTO (R_OR1K_TLS_IE_HI16, /* type */
458 16, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_OR1K_TLS_IE_HI16", /* name */
466 FALSE, /* partial_inplace */
467 0x0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 HOWTO (R_OR1K_TLS_IE_LO16, /* type */
472 0, /* rightshift */
473 2, /* size (0 = byte, 1 = short, 2 = long) */
474 16, /* bitsize */
475 FALSE, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_dont, /* complain_on_overflow */
478 bfd_elf_generic_reloc, /* special_function */
479 "R_OR1K_TLS_IE_LO16", /* name */
480 FALSE, /* partial_inplace */
481 0x0, /* src_mask */
482 0xffff, /* dst_mask */
483 FALSE), /* pcrel_offset */
484
485 HOWTO (R_OR1K_TLS_LE_HI16, /* type */
486 16, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 16, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_dont, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_OR1K_TLS_LE_HI16", /* name */
494 FALSE, /* partial_inplace */
495 0x0, /* src_mask */
496 0xffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 HOWTO (R_OR1K_TLS_LE_LO16, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 16, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_OR1K_TLS_LE_LO16", /* name */
508 FALSE, /* partial_inplace */
509 0x0, /* src_mask */
510 0xffff, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 };
514
515 /* Map BFD reloc types to Or1k ELF reloc types. */
516
517 struct or1k_reloc_map
518 {
519 bfd_reloc_code_real_type bfd_reloc_val;
520 unsigned int or1k_reloc_val;
521 };
522
523 static const struct or1k_reloc_map or1k_reloc_map[] =
524 {
525 { BFD_RELOC_NONE, R_OR1K_NONE },
526 { BFD_RELOC_32, R_OR1K_32 },
527 { BFD_RELOC_16, R_OR1K_16 },
528 { BFD_RELOC_8, R_OR1K_8 },
529 { BFD_RELOC_LO16, R_OR1K_LO_16_IN_INSN },
530 { BFD_RELOC_HI16, R_OR1K_HI_16_IN_INSN },
531 { BFD_RELOC_OR1K_REL_26, R_OR1K_INSN_REL_26 },
532 { BFD_RELOC_VTABLE_ENTRY, R_OR1K_GNU_VTENTRY },
533 { BFD_RELOC_VTABLE_INHERIT, R_OR1K_GNU_VTINHERIT },
534 { BFD_RELOC_32_PCREL, R_OR1K_32_PCREL },
535 { BFD_RELOC_16_PCREL, R_OR1K_16_PCREL },
536 { BFD_RELOC_8_PCREL, R_OR1K_8_PCREL },
537 { BFD_RELOC_OR1K_GOTPC_HI16, R_OR1K_GOTPC_HI16 },
538 { BFD_RELOC_OR1K_GOTPC_LO16, R_OR1K_GOTPC_LO16 },
539 { BFD_RELOC_OR1K_GOT16, R_OR1K_GOT16 },
540 { BFD_RELOC_OR1K_PLT26, R_OR1K_PLT26 },
541 { BFD_RELOC_OR1K_GOTOFF_HI16, R_OR1K_GOTOFF_HI16 },
542 { BFD_RELOC_OR1K_GOTOFF_LO16, R_OR1K_GOTOFF_LO16 },
543 { BFD_RELOC_OR1K_GLOB_DAT, R_OR1K_GLOB_DAT },
544 { BFD_RELOC_OR1K_COPY, R_OR1K_COPY },
545 { BFD_RELOC_OR1K_JMP_SLOT, R_OR1K_JMP_SLOT },
546 { BFD_RELOC_OR1K_RELATIVE, R_OR1K_RELATIVE },
547 { BFD_RELOC_OR1K_TLS_GD_HI16, R_OR1K_TLS_GD_HI16 },
548 { BFD_RELOC_OR1K_TLS_GD_LO16, R_OR1K_TLS_GD_LO16 },
549 { BFD_RELOC_OR1K_TLS_LDM_HI16, R_OR1K_TLS_LDM_HI16 },
550 { BFD_RELOC_OR1K_TLS_LDM_LO16, R_OR1K_TLS_LDM_LO16 },
551 { BFD_RELOC_OR1K_TLS_LDO_HI16, R_OR1K_TLS_LDO_HI16 },
552 { BFD_RELOC_OR1K_TLS_LDO_LO16, R_OR1K_TLS_LDO_LO16 },
553 { BFD_RELOC_OR1K_TLS_IE_HI16, R_OR1K_TLS_IE_HI16 },
554 { BFD_RELOC_OR1K_TLS_IE_LO16, R_OR1K_TLS_IE_LO16 },
555 { BFD_RELOC_OR1K_TLS_LE_HI16, R_OR1K_TLS_LE_HI16 },
556 { BFD_RELOC_OR1K_TLS_LE_LO16, R_OR1K_TLS_LE_LO16 },
557 };
558
559 /* The linker needs to keep track of the number of relocs that it
560 decides to copy as dynamic relocs in check_relocs for each symbol.
561 This is so that it can later discard them if they are found to be
562 unnecessary. We store the information in a field extending the
563 regular ELF linker hash table. */
564
565 struct elf_or1k_dyn_relocs
566 {
567 struct elf_or1k_dyn_relocs *next;
568
569 /* The input section of the reloc. */
570 asection *sec;
571
572 /* Total number of relocs copied for the input section. */
573 bfd_size_type count;
574
575 /* Number of pc-relative relocs copied for the input section. */
576 bfd_size_type pc_count;
577 };
578
579 #define TLS_UNKNOWN 0
580 #define TLS_NONE 1
581 #define TLS_GD 2
582 #define TLS_LD 3
583 #define TLS_IE 4
584 #define TLS_LE 5
585
586 /* ELF linker hash entry. */
587 struct elf_or1k_link_hash_entry
588 {
589 struct elf_link_hash_entry root;
590
591 /* Track dynamic relocs copied for this symbol. */
592 struct elf_or1k_dyn_relocs *dyn_relocs;
593
594 /* Track type of TLS access. */
595 unsigned char tls_type;
596 };
597
598 /* ELF object data. */
599 struct elf_or1k_obj_tdata
600 {
601 struct elf_obj_tdata root;
602
603 /* tls_type for each local got entry. */
604 unsigned char *local_tls_type;
605 };
606
607 #define elf_or1k_tdata(abfd) \
608 ((struct elf_or1k_obj_tdata *) (abfd)->tdata.any)
609
610 #define elf_or1k_local_tls_type(abfd) \
611 (elf_or1k_tdata (abfd)->local_tls_type)
612
613 /* ELF linker hash table. */
614 struct elf_or1k_link_hash_table
615 {
616 struct elf_link_hash_table root;
617
618 /* Short-cuts to get to dynamic linker sections. */
619 asection *sgot;
620 asection *sgotplt;
621 asection *srelgot;
622 asection *splt;
623 asection *srelplt;
624 asection *sdynbss;
625 asection *srelbss;
626
627 /* Small local sym to section mapping cache. */
628 struct sym_cache sym_sec;
629 };
630
631 /* Get the ELF linker hash table from a link_info structure. */
632 #define or1k_elf_hash_table(p) \
633 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
634 == OR1K_ELF_DATA ? ((struct elf_or1k_link_hash_table *) ((p)->hash)) : NULL)
635
636 static bfd_boolean
637 elf_or1k_mkobject (bfd *abfd)
638 {
639 return bfd_elf_allocate_object (abfd, sizeof (struct elf_or1k_obj_tdata),
640 OR1K_ELF_DATA);
641 }
642
643 /* Create an entry in an or1k ELF linker hash table. */
644
645 static struct bfd_hash_entry *
646 or1k_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
647 struct bfd_hash_table *table,
648 const char *string)
649 {
650 struct elf_or1k_link_hash_entry *ret =
651 (struct elf_or1k_link_hash_entry *) entry;
652
653 /* Allocate the structure if it has not already been allocated by a
654 subclass. */
655 if (ret == NULL)
656 ret = bfd_hash_allocate (table,
657 sizeof (struct elf_or1k_link_hash_entry));
658 if (ret == NULL)
659 return NULL;
660
661 /* Call the allocation method of the superclass. */
662 ret = ((struct elf_or1k_link_hash_entry *)
663 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
664 table, string));
665 if (ret != NULL)
666 {
667 struct elf_or1k_link_hash_entry *eh;
668
669 eh = (struct elf_or1k_link_hash_entry *) ret;
670 eh->dyn_relocs = NULL;
671 eh->tls_type = TLS_UNKNOWN;
672 }
673
674 return (struct bfd_hash_entry *) ret;
675 }
676
677 /* Create an or1k ELF linker hash table. */
678
679 static struct bfd_link_hash_table *
680 or1k_elf_link_hash_table_create (bfd *abfd)
681 {
682 struct elf_or1k_link_hash_table *ret;
683 bfd_size_type amt = sizeof (struct elf_or1k_link_hash_table);
684
685 ret = bfd_zmalloc (amt);
686 if (ret == NULL)
687 return NULL;
688
689 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
690 or1k_elf_link_hash_newfunc,
691 sizeof (struct elf_or1k_link_hash_entry),
692 OR1K_ELF_DATA))
693 {
694 free (ret);
695 return NULL;
696 }
697
698 return &ret->root.root;
699 }
700
701 static reloc_howto_type *
702 or1k_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
703 bfd_reloc_code_real_type code)
704 {
705 unsigned int i;
706
707 for (i = ARRAY_SIZE (or1k_reloc_map); i--;)
708 if (or1k_reloc_map[i].bfd_reloc_val == code)
709 return & or1k_elf_howto_table[or1k_reloc_map[i].or1k_reloc_val];
710
711 return NULL;
712 }
713
714 static reloc_howto_type *
715 or1k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
716 const char *r_name)
717 {
718 unsigned int i;
719
720 for (i = 0;
721 i < (sizeof (or1k_elf_howto_table)
722 / sizeof (or1k_elf_howto_table[0]));
723 i++)
724 if (or1k_elf_howto_table[i].name != NULL
725 && strcasecmp (or1k_elf_howto_table[i].name, r_name) == 0)
726 return &or1k_elf_howto_table[i];
727
728 return NULL;
729 }
730
731 /* Set the howto pointer for an Or1k ELF reloc. */
732
733 static void
734 or1k_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
735 arelent * cache_ptr,
736 Elf_Internal_Rela * dst)
737 {
738 unsigned int r_type;
739
740 r_type = ELF32_R_TYPE (dst->r_info);
741 if (r_type >= (unsigned int) R_OR1K_max)
742 {
743 _bfd_error_handler (_("%B: invalid OR1K reloc number: %d"), abfd, r_type);
744 r_type = 0;
745 }
746 cache_ptr->howto = & or1k_elf_howto_table[r_type];
747 }
748
749
750 /* Return the relocation value for @tpoff relocations.. */
751 static bfd_vma
752 tpoff (struct bfd_link_info *info, bfd_vma address)
753 {
754 /* If tls_sec is NULL, we should have signalled an error already. */
755 if (elf_hash_table (info)->tls_sec == NULL)
756 return 0;
757
758 /* The thread pointer on or1k stores the address after the TCB where
759 the data is, just compute the difference. No need to compensate
760 for the size of TCB. */
761 return (address - elf_hash_table (info)->tls_sec->vma);
762 }
763
764 /* Relocate an Or1k ELF section.
765
766 The RELOCATE_SECTION function is called by the new ELF backend linker
767 to handle the relocations for a section.
768
769 The relocs are always passed as Rela structures; if the section
770 actually uses Rel structures, the r_addend field will always be
771 zero.
772
773 This function is responsible for adjusting the section contents as
774 necessary, and (if using Rela relocs and generating a relocatable
775 output file) adjusting the reloc addend as necessary.
776
777 This function does not have to worry about setting the reloc
778 address or the reloc symbol index.
779
780 LOCAL_SYMS is a pointer to the swapped in local symbols.
781
782 LOCAL_SECTIONS is an array giving the section in the input file
783 corresponding to the st_shndx field of each local symbol.
784
785 The global hash table entry for the global symbols can be found
786 via elf_sym_hashes (input_bfd).
787
788 When generating relocatable output, this function must handle
789 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
790 going to be the section symbol corresponding to the output
791 section, which means that the addend must be adjusted
792 accordingly. */
793
794 static bfd_boolean
795 or1k_elf_relocate_section (bfd *output_bfd,
796 struct bfd_link_info *info,
797 bfd *input_bfd,
798 asection *input_section,
799 bfd_byte *contents,
800 Elf_Internal_Rela *relocs,
801 Elf_Internal_Sym *local_syms,
802 asection **local_sections)
803 {
804 Elf_Internal_Shdr *symtab_hdr;
805 struct elf_link_hash_entry **sym_hashes;
806 Elf_Internal_Rela *rel;
807 Elf_Internal_Rela *relend;
808 struct elf_or1k_link_hash_table *htab = or1k_elf_hash_table (info);
809 bfd *dynobj;
810 asection *sreloc;
811 bfd_vma *local_got_offsets;
812 asection *sgot;
813
814 if (htab == NULL)
815 return FALSE;
816
817 dynobj = htab->root.dynobj;
818 local_got_offsets = elf_local_got_offsets (input_bfd);
819
820 sreloc = elf_section_data (input_section)->sreloc;
821
822 sgot = htab->sgot;
823
824 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
825 sym_hashes = elf_sym_hashes (input_bfd);
826 relend = relocs + input_section->reloc_count;
827
828 for (rel = relocs; rel < relend; rel++)
829 {
830 reloc_howto_type *howto;
831 unsigned long r_symndx;
832 Elf_Internal_Sym *sym;
833 asection *sec;
834 struct elf_link_hash_entry *h;
835 bfd_vma relocation;
836 bfd_reloc_status_type r;
837 const char *name = NULL;
838 int r_type;
839
840 r_type = ELF32_R_TYPE (rel->r_info);
841 r_symndx = ELF32_R_SYM (rel->r_info);
842
843 if (r_type == R_OR1K_GNU_VTINHERIT
844 || r_type == R_OR1K_GNU_VTENTRY)
845 continue;
846
847 if (r_type < 0 || r_type >= (int) R_OR1K_max)
848 {
849 bfd_set_error (bfd_error_bad_value);
850 return FALSE;
851 }
852
853 howto = or1k_elf_howto_table + ELF32_R_TYPE (rel->r_info);
854 h = NULL;
855 sym = NULL;
856 sec = NULL;
857
858 if (r_symndx < symtab_hdr->sh_info)
859 {
860 sym = local_syms + r_symndx;
861 sec = local_sections[r_symndx];
862 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
863
864 name = bfd_elf_string_from_elf_section
865 (input_bfd, symtab_hdr->sh_link, sym->st_name);
866 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
867 }
868 else
869 {
870 bfd_boolean unresolved_reloc, warned, ignored;
871
872 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
873 r_symndx, symtab_hdr, sym_hashes,
874 h, sec, relocation,
875 unresolved_reloc, warned, ignored);
876 }
877
878 if (sec != NULL && discarded_section (sec))
879 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
880 rel, 1, relend, howto, 0, contents);
881
882 if (bfd_link_relocatable (info))
883 continue;
884
885 switch (howto->type)
886 {
887 case R_OR1K_PLT26:
888 {
889 if (htab->splt != NULL && h != NULL
890 && h->plt.offset != (bfd_vma) -1)
891 {
892 relocation = (htab->splt->output_section->vma
893 + htab->splt->output_offset
894 + h->plt.offset);
895 }
896 break;
897 }
898
899 case R_OR1K_GOT16:
900 /* Relocation is to the entry for this symbol in the global
901 offset table. */
902 BFD_ASSERT (sgot != NULL);
903 if (h != NULL)
904 {
905 bfd_boolean dyn;
906 bfd_vma off;
907
908 off = h->got.offset;
909 BFD_ASSERT (off != (bfd_vma) -1);
910
911 dyn = htab->root.dynamic_sections_created;
912 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
913 bfd_link_pic (info),
914 h)
915 || (bfd_link_pic (info)
916 && SYMBOL_REFERENCES_LOCAL (info, h)))
917 {
918 /* This is actually a static link, or it is a
919 -Bsymbolic link and the symbol is defined
920 locally, or the symbol was forced to be local
921 because of a version file. We must initialize
922 this entry in the global offset table. Since the
923 offset must always be a multiple of 4, we use the
924 least significant bit to record whether we have
925 initialized it already.
926
927 When doing a dynamic link, we create a .rela.got
928 relocation entry to initialize the value. This
929 is done in the finish_dynamic_symbol routine. */
930 if ((off & 1) != 0)
931 off &= ~1;
932 else
933 {
934 /* Write entry in GOT. */
935 bfd_put_32 (output_bfd, relocation,
936 sgot->contents + off);
937 /* Mark GOT entry as having been written. */
938 h->got.offset |= 1;
939 }
940 }
941
942 relocation = sgot->output_offset + off;
943 }
944 else
945 {
946 bfd_vma off;
947 bfd_byte *loc;
948
949 BFD_ASSERT (local_got_offsets != NULL
950 && local_got_offsets[r_symndx] != (bfd_vma) -1);
951
952 /* Get offset into GOT table. */
953 off = local_got_offsets[r_symndx];
954
955 /* The offset must always be a multiple of 4. We use
956 the least significant bit to record whether we have
957 already processed this entry. */
958 if ((off & 1) != 0)
959 off &= ~1;
960 else
961 {
962 /* Write entry in GOT. */
963 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
964 if (bfd_link_pic (info))
965 {
966 asection *srelgot;
967 Elf_Internal_Rela outrel;
968
969 /* We need to generate a R_OR1K_RELATIVE reloc
970 for the dynamic linker. */
971 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
972 BFD_ASSERT (srelgot != NULL);
973
974 outrel.r_offset = (sgot->output_section->vma
975 + sgot->output_offset
976 + off);
977 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
978 outrel.r_addend = relocation;
979 loc = srelgot->contents;
980 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
981 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
982 ++srelgot->reloc_count;
983 }
984
985 local_got_offsets[r_symndx] |= 1;
986 }
987 relocation = sgot->output_offset + off;
988 }
989
990 /* Addend should be zero. */
991 if (rel->r_addend != 0)
992 (*_bfd_error_handler)
993 (_("internal error: addend should be zero for R_OR1K_GOT16"));
994
995 break;
996
997 case R_OR1K_GOTOFF_LO16:
998 case R_OR1K_GOTOFF_HI16:
999 /* Relocation is offset from GOT. */
1000 BFD_ASSERT (sgot != NULL);
1001 relocation -= sgot->output_section->vma;
1002 break;
1003
1004 case R_OR1K_INSN_REL_26:
1005 case R_OR1K_HI_16_IN_INSN:
1006 case R_OR1K_LO_16_IN_INSN:
1007 case R_OR1K_32:
1008 /* R_OR1K_16? */
1009 {
1010 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1011 from removed linkonce sections, or sections discarded by
1012 a linker script. */
1013 if (r_symndx == STN_UNDEF
1014 || (input_section->flags & SEC_ALLOC) == 0)
1015 break;
1016
1017 if ((bfd_link_pic (info)
1018 && (h == NULL
1019 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1020 || h->root.type != bfd_link_hash_undefweak)
1021 && (howto->type != R_OR1K_INSN_REL_26
1022 || !SYMBOL_CALLS_LOCAL (info, h)))
1023 || (!bfd_link_pic (info)
1024 && h != NULL
1025 && h->dynindx != -1
1026 && !h->non_got_ref
1027 && ((h->def_dynamic
1028 && !h->def_regular)
1029 || h->root.type == bfd_link_hash_undefweak
1030 || h->root.type == bfd_link_hash_undefined)))
1031 {
1032 Elf_Internal_Rela outrel;
1033 bfd_byte *loc;
1034 bfd_boolean skip;
1035
1036 /* When generating a shared object, these relocations
1037 are copied into the output file to be resolved at run
1038 time. */
1039
1040 BFD_ASSERT (sreloc != NULL);
1041
1042 skip = FALSE;
1043
1044 outrel.r_offset =
1045 _bfd_elf_section_offset (output_bfd, info, input_section,
1046 rel->r_offset);
1047 if (outrel.r_offset == (bfd_vma) -1)
1048 skip = TRUE;
1049 else if (outrel.r_offset == (bfd_vma) -2)
1050 skip = TRUE;
1051 outrel.r_offset += (input_section->output_section->vma
1052 + input_section->output_offset);
1053
1054 if (skip)
1055 memset (&outrel, 0, sizeof outrel);
1056 /* h->dynindx may be -1 if the symbol was marked to
1057 become local. */
1058 else if (h != NULL
1059 && ((! info->symbolic && h->dynindx != -1)
1060 || !h->def_regular))
1061 {
1062 BFD_ASSERT (h->dynindx != -1);
1063 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1064 outrel.r_addend = rel->r_addend;
1065 }
1066 else
1067 {
1068 if (r_type == R_OR1K_32)
1069 {
1070 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
1071 outrel.r_addend = relocation + rel->r_addend;
1072 }
1073 else
1074 {
1075 BFD_FAIL ();
1076 (*_bfd_error_handler)
1077 (_("%B: probably compiled without -fPIC?"),
1078 input_bfd);
1079 bfd_set_error (bfd_error_bad_value);
1080 return FALSE;
1081 }
1082 }
1083
1084 loc = sreloc->contents;
1085 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1086 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1087 break;
1088 }
1089 break;
1090 }
1091
1092 case R_OR1K_TLS_LDM_HI16:
1093 case R_OR1K_TLS_LDM_LO16:
1094 case R_OR1K_TLS_LDO_HI16:
1095 case R_OR1K_TLS_LDO_LO16:
1096 /* TODO: implement support for local dynamic. */
1097 BFD_FAIL ();
1098 (*_bfd_error_handler)
1099 (_("%B: support for local dynamic not implemented"),
1100 input_bfd);
1101 bfd_set_error (bfd_error_bad_value);
1102 return FALSE;
1103
1104
1105 case R_OR1K_TLS_GD_HI16:
1106 case R_OR1K_TLS_GD_LO16:
1107 case R_OR1K_TLS_IE_HI16:
1108 case R_OR1K_TLS_IE_LO16:
1109 {
1110 bfd_vma gotoff;
1111 Elf_Internal_Rela rela;
1112 bfd_byte *loc;
1113 int dynamic;
1114
1115 sreloc = bfd_get_section_by_name (dynobj, ".rela.got");
1116
1117 /* Mark as TLS related GOT entry by setting
1118 bit 2 as well as bit 1. */
1119 if (h != NULL)
1120 {
1121 gotoff = h->got.offset;
1122 h->got.offset |= 3;
1123 }
1124 else
1125 {
1126 gotoff = local_got_offsets[r_symndx];
1127 local_got_offsets[r_symndx] |= 3;
1128 }
1129
1130 /* Only process the relocation once. */
1131 if (gotoff & 1)
1132 {
1133 relocation = sgot->output_offset + (gotoff & ~3);
1134 break;
1135 }
1136
1137 BFD_ASSERT (elf_hash_table (info)->hgot == NULL
1138 || elf_hash_table (info)->hgot->root.u.def.value == 0);
1139
1140 /* Dynamic entries will require relocations. if we do not need
1141 them we will just use the default R_OR1K_NONE and
1142 not set anything. */
1143 dynamic = bfd_link_pic (info)
1144 || (sec && (sec->flags & SEC_ALLOC) != 0
1145 && h != NULL
1146 && (h->root.type == bfd_link_hash_defweak || !h->def_regular));
1147
1148 /* Shared GD. */
1149 if (dynamic && (howto->type == R_OR1K_TLS_GD_HI16
1150 || howto->type == R_OR1K_TLS_GD_LO16))
1151 {
1152 int i;
1153
1154 /* Add DTPMOD and DTPOFF GOT and rela entries. */
1155 for (i = 0; i < 2; ++i)
1156 {
1157 rela.r_offset = sgot->output_section->vma +
1158 sgot->output_offset + gotoff + i*4;
1159 if (h != NULL && h->dynindx != -1)
1160 {
1161 rela.r_info = ELF32_R_INFO (h->dynindx,
1162 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF));
1163 rela.r_addend = 0;
1164 }
1165 else
1166 {
1167 rela.r_info = ELF32_R_INFO (0,
1168 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF));
1169 rela.r_addend = tpoff (info, relocation);
1170 }
1171
1172 loc = sreloc->contents;
1173 loc += sreloc->reloc_count++ *
1174 sizeof (Elf32_External_Rela);
1175
1176 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1177 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff + i*4);
1178 }
1179 }
1180 /* Static GD. */
1181 else if (howto->type == R_OR1K_TLS_GD_HI16
1182 || howto->type == R_OR1K_TLS_GD_LO16)
1183 {
1184 bfd_put_32 (output_bfd, 1, sgot->contents + gotoff);
1185 bfd_put_32 (output_bfd, tpoff (info, relocation),
1186 sgot->contents + gotoff + 4);
1187 }
1188 /* Shared IE. */
1189 else if (dynamic)
1190 {
1191 /* Add TPOFF GOT and rela entries. */
1192 rela.r_offset = sgot->output_section->vma +
1193 sgot->output_offset + gotoff;
1194 if (h != NULL && h->dynindx != -1)
1195 {
1196 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_TLS_TPOFF);
1197 rela.r_addend = 0;
1198 }
1199 else
1200 {
1201 rela.r_info = ELF32_R_INFO (0, R_OR1K_TLS_TPOFF);
1202 rela.r_addend = tpoff (info, relocation);
1203 }
1204
1205 loc = sreloc->contents;
1206 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1207
1208 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1209 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff);
1210 }
1211 /* Static IE. */
1212 else
1213 {
1214 bfd_put_32 (output_bfd, tpoff (info, relocation),
1215 sgot->contents + gotoff);
1216 }
1217 relocation = sgot->output_offset + gotoff;
1218 break;
1219 }
1220 case R_OR1K_TLS_LE_HI16:
1221 case R_OR1K_TLS_LE_LO16:
1222
1223 /* Relocation is offset from TP. */
1224 relocation = tpoff (info, relocation);
1225 break;
1226
1227 case R_OR1K_TLS_DTPMOD:
1228 case R_OR1K_TLS_DTPOFF:
1229 case R_OR1K_TLS_TPOFF:
1230 /* These are resolved dynamically on load and shouldn't
1231 be used as linker input. */
1232 BFD_FAIL ();
1233 (*_bfd_error_handler)
1234 (_("%B: will not resolve runtime TLS relocation"),
1235 input_bfd);
1236 bfd_set_error (bfd_error_bad_value);
1237 return FALSE;
1238
1239 default:
1240 break;
1241 }
1242 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1243 rel->r_offset, relocation, rel->r_addend);
1244
1245 if (r != bfd_reloc_ok)
1246 {
1247 const char *msg = NULL;
1248
1249 switch (r)
1250 {
1251 case bfd_reloc_overflow:
1252 r = info->callbacks->reloc_overflow
1253 (info, (h ? &h->root : NULL), name, howto->name,
1254 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1255 break;
1256
1257 case bfd_reloc_undefined:
1258 r = info->callbacks->undefined_symbol
1259 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1260 break;
1261
1262 case bfd_reloc_outofrange:
1263 msg = _("internal error: out of range error");
1264 break;
1265
1266 case bfd_reloc_notsupported:
1267 msg = _("internal error: unsupported relocation error");
1268 break;
1269
1270 case bfd_reloc_dangerous:
1271 msg = _("internal error: dangerous relocation");
1272 break;
1273
1274 default:
1275 msg = _("internal error: unknown error");
1276 break;
1277 }
1278
1279 if (msg)
1280 r = info->callbacks->warning
1281 (info, msg, name, input_bfd, input_section, rel->r_offset);
1282
1283 if (!r)
1284 return FALSE;
1285 }
1286 }
1287
1288 return TRUE;
1289 }
1290
1291 /* Return the section that should be marked against GC for a given
1292 relocation. */
1293
1294 static asection *
1295 or1k_elf_gc_mark_hook (asection *sec,
1296 struct bfd_link_info *info,
1297 Elf_Internal_Rela *rel,
1298 struct elf_link_hash_entry *h,
1299 Elf_Internal_Sym *sym)
1300 {
1301 if (h != NULL)
1302 switch (ELF32_R_TYPE (rel->r_info))
1303 {
1304 case R_OR1K_GNU_VTINHERIT:
1305 case R_OR1K_GNU_VTENTRY:
1306 return NULL;
1307 }
1308
1309 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1310 }
1311
1312 static bfd_boolean
1313 or1k_elf_gc_sweep_hook (bfd *abfd,
1314 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1315 asection *sec,
1316 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
1317 {
1318 /* Update the got entry reference counts for the section being removed. */
1319 Elf_Internal_Shdr *symtab_hdr;
1320 struct elf_link_hash_entry **sym_hashes;
1321 bfd_signed_vma *local_got_refcounts;
1322 const Elf_Internal_Rela *rel, *relend;
1323
1324 elf_section_data (sec)->local_dynrel = NULL;
1325
1326 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1327 sym_hashes = elf_sym_hashes (abfd);
1328 local_got_refcounts = elf_local_got_refcounts (abfd);
1329
1330 relend = relocs + sec->reloc_count;
1331 for (rel = relocs; rel < relend; rel++)
1332 {
1333 unsigned long r_symndx;
1334 struct elf_link_hash_entry *h = NULL;
1335
1336 r_symndx = ELF32_R_SYM (rel->r_info);
1337 if (r_symndx >= symtab_hdr->sh_info)
1338 {
1339 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1340 while (h->root.type == bfd_link_hash_indirect
1341 || h->root.type == bfd_link_hash_warning)
1342 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1343 }
1344
1345 switch (ELF32_R_TYPE (rel->r_info))
1346 {
1347 case R_OR1K_GOT16:
1348 if (h != NULL)
1349 {
1350 if (h->got.refcount > 0)
1351 h->got.refcount--;
1352 }
1353 else
1354 {
1355 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0)
1356 local_got_refcounts[r_symndx]--;
1357 }
1358 break;
1359
1360 default:
1361 break;
1362 }
1363 }
1364 return TRUE;
1365 }
1366
1367 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
1368 shortcuts to them in our hash table. */
1369
1370 static bfd_boolean
1371 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1372 {
1373 struct elf_or1k_link_hash_table *htab;
1374 asection *s;
1375
1376 /* This function may be called more than once. */
1377 s = bfd_get_section_by_name (dynobj, ".got");
1378 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
1379 return TRUE;
1380
1381 htab = or1k_elf_hash_table (info);
1382 if (htab == NULL)
1383 return FALSE;
1384
1385 if (! _bfd_elf_create_got_section (dynobj, info))
1386 return FALSE;
1387
1388 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1389 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1390 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1391
1392 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot)
1393 abort ();
1394
1395 if (! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
1396 | SEC_LOAD
1397 | SEC_HAS_CONTENTS
1398 | SEC_IN_MEMORY
1399 | SEC_LINKER_CREATED
1400 | SEC_READONLY)
1401 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1402 return FALSE;
1403
1404 return TRUE;
1405 }
1406
1407 /* Look through the relocs for a section during the first phase. */
1408
1409 static bfd_boolean
1410 or1k_elf_check_relocs (bfd *abfd,
1411 struct bfd_link_info *info,
1412 asection *sec,
1413 const Elf_Internal_Rela *relocs)
1414 {
1415 Elf_Internal_Shdr *symtab_hdr;
1416 struct elf_link_hash_entry **sym_hashes;
1417 const Elf_Internal_Rela *rel;
1418
1419 const Elf_Internal_Rela *rel_end;
1420 struct elf_or1k_link_hash_table *htab;
1421 bfd *dynobj;
1422 asection *sreloc = NULL;
1423
1424 if (bfd_link_relocatable (info))
1425 return TRUE;
1426
1427 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1428 sym_hashes = elf_sym_hashes (abfd);
1429
1430 htab = or1k_elf_hash_table (info);
1431 if (htab == NULL)
1432 return FALSE;
1433
1434 dynobj = htab->root.dynobj;
1435
1436 rel_end = relocs + sec->reloc_count;
1437 for (rel = relocs; rel < rel_end; rel++)
1438 {
1439 struct elf_link_hash_entry *h;
1440 unsigned long r_symndx;
1441 unsigned char tls_type;
1442
1443 r_symndx = ELF32_R_SYM (rel->r_info);
1444 if (r_symndx < symtab_hdr->sh_info)
1445 h = NULL;
1446 else
1447 {
1448 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1449 while (h->root.type == bfd_link_hash_indirect
1450 || h->root.type == bfd_link_hash_warning)
1451 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1452
1453 /* PR15323, ref flags aren't set for references in the same
1454 object. */
1455 h->root.non_ir_ref = 1;
1456 }
1457
1458 switch (ELF32_R_TYPE (rel->r_info))
1459 {
1460 case R_OR1K_TLS_GD_HI16:
1461 case R_OR1K_TLS_GD_LO16:
1462 tls_type = TLS_GD;
1463 break;
1464 case R_OR1K_TLS_LDM_HI16:
1465 case R_OR1K_TLS_LDM_LO16:
1466 case R_OR1K_TLS_LDO_HI16:
1467 case R_OR1K_TLS_LDO_LO16:
1468 tls_type = TLS_LD;
1469 break;
1470 case R_OR1K_TLS_IE_HI16:
1471 case R_OR1K_TLS_IE_LO16:
1472 tls_type = TLS_IE;
1473 break;
1474 case R_OR1K_TLS_LE_HI16:
1475 case R_OR1K_TLS_LE_LO16:
1476 tls_type = TLS_LE;
1477 break;
1478 default:
1479 tls_type = TLS_NONE;
1480 }
1481
1482 /* Record TLS type. */
1483 if (h != NULL)
1484 ((struct elf_or1k_link_hash_entry *) h)->tls_type = tls_type;
1485 else
1486 {
1487 unsigned char *local_tls_type;
1488
1489 /* This is a TLS type record for a local symbol. */
1490 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (abfd);
1491 if (local_tls_type == NULL)
1492 {
1493 bfd_size_type size;
1494
1495 size = symtab_hdr->sh_info;
1496 local_tls_type = bfd_zalloc (abfd, size);
1497 if (local_tls_type == NULL)
1498 return FALSE;
1499 elf_or1k_local_tls_type (abfd) = local_tls_type;
1500 }
1501 local_tls_type[r_symndx] = tls_type;
1502 }
1503
1504 switch (ELF32_R_TYPE (rel->r_info))
1505 {
1506 /* This relocation describes the C++ object vtable hierarchy.
1507 Reconstruct it for later use during GC. */
1508 case R_OR1K_GNU_VTINHERIT:
1509 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1510 return FALSE;
1511 break;
1512
1513 /* This relocation describes which C++ vtable entries are actually
1514 used. Record for later use during GC. */
1515 case R_OR1K_GNU_VTENTRY:
1516 BFD_ASSERT (h != NULL);
1517 if (h != NULL
1518 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1519 return FALSE;
1520 break;
1521
1522 /* This relocation requires .plt entry. */
1523 case R_OR1K_PLT26:
1524 if (h != NULL)
1525 {
1526 h->needs_plt = 1;
1527 h->plt.refcount += 1;
1528 }
1529 break;
1530
1531 case R_OR1K_GOT16:
1532 case R_OR1K_GOTOFF_HI16:
1533 case R_OR1K_GOTOFF_LO16:
1534 case R_OR1K_TLS_GD_HI16:
1535 case R_OR1K_TLS_GD_LO16:
1536 case R_OR1K_TLS_IE_HI16:
1537 case R_OR1K_TLS_IE_LO16:
1538 if (htab->sgot == NULL)
1539 {
1540 if (dynobj == NULL)
1541 htab->root.dynobj = dynobj = abfd;
1542 if (! create_got_section (dynobj, info))
1543 return FALSE;
1544 }
1545
1546 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_HI16 &&
1547 ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_LO16)
1548 {
1549 if (h != NULL)
1550 h->got.refcount += 1;
1551 else
1552 {
1553 bfd_signed_vma *local_got_refcounts;
1554
1555 /* This is a global offset table entry for a local symbol. */
1556 local_got_refcounts = elf_local_got_refcounts (abfd);
1557 if (local_got_refcounts == NULL)
1558 {
1559 bfd_size_type size;
1560
1561 size = symtab_hdr->sh_info;
1562 size *= sizeof (bfd_signed_vma);
1563 local_got_refcounts = bfd_zalloc (abfd, size);
1564 if (local_got_refcounts == NULL)
1565 return FALSE;
1566 elf_local_got_refcounts (abfd) = local_got_refcounts;
1567 }
1568 local_got_refcounts[r_symndx] += 1;
1569 }
1570 }
1571 break;
1572
1573 case R_OR1K_INSN_REL_26:
1574 case R_OR1K_HI_16_IN_INSN:
1575 case R_OR1K_LO_16_IN_INSN:
1576 case R_OR1K_32:
1577 /* R_OR1K_16? */
1578 {
1579 if (h != NULL && !bfd_link_pic (info))
1580 {
1581 /* We may need a copy reloc. */
1582 h->non_got_ref = 1;
1583
1584 /* We may also need a .plt entry. */
1585 h->plt.refcount += 1;
1586 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26)
1587 h->pointer_equality_needed = 1;
1588 }
1589
1590 /* If we are creating a shared library, and this is a reloc
1591 against a global symbol, or a non PC relative reloc
1592 against a local symbol, then we need to copy the reloc
1593 into the shared library. However, if we are linking with
1594 -Bsymbolic, we do not need to copy a reloc against a
1595 global symbol which is defined in an object we are
1596 including in the link (i.e., DEF_REGULAR is set). At
1597 this point we have not seen all the input files, so it is
1598 possible that DEF_REGULAR is not set now but will be set
1599 later (it is never cleared). In case of a weak definition,
1600 DEF_REGULAR may be cleared later by a strong definition in
1601 a shared library. We account for that possibility below by
1602 storing information in the relocs_copied field of the hash
1603 table entry. A similar situation occurs when creating
1604 shared libraries and symbol visibility changes render the
1605 symbol local.
1606
1607 If on the other hand, we are creating an executable, we
1608 may need to keep relocations for symbols satisfied by a
1609 dynamic library if we manage to avoid copy relocs for the
1610 symbol. */
1611
1612 if ((bfd_link_pic (info)
1613 && (sec->flags & SEC_ALLOC) != 0
1614 && (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26
1615 || (h != NULL
1616 && (!SYMBOLIC_BIND (info, h)
1617 || h->root.type == bfd_link_hash_defweak
1618 || !h->def_regular))))
1619 || (!bfd_link_pic (info)
1620 && (sec->flags & SEC_ALLOC) != 0
1621 && h != NULL
1622 && (h->root.type == bfd_link_hash_defweak
1623 || !h->def_regular)))
1624 {
1625 struct elf_or1k_dyn_relocs *p;
1626 struct elf_or1k_dyn_relocs **head;
1627
1628 /* When creating a shared object, we must copy these
1629 relocs into the output file. We create a reloc
1630 section in dynobj and make room for the reloc. */
1631 if (sreloc == NULL)
1632 {
1633 const char *name;
1634 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1635 unsigned int shnam = _bfd_elf_single_rel_hdr (sec)->sh_name;
1636
1637 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1638 if (name == NULL)
1639 return FALSE;
1640
1641 if (strncmp (name, ".rela", 5) != 0
1642 || strcmp (bfd_get_section_name (abfd, sec),
1643 name + 5) != 0)
1644 {
1645 (*_bfd_error_handler)
1646 (_("%B: bad relocation section name `%s\'"),
1647 abfd, name);
1648 }
1649
1650 if (htab->root.dynobj == NULL)
1651 htab->root.dynobj = abfd;
1652 dynobj = htab->root.dynobj;
1653
1654 sreloc = bfd_get_section_by_name (dynobj, name);
1655 if (sreloc == NULL)
1656 {
1657 sreloc = _bfd_elf_make_dynamic_reloc_section
1658 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
1659
1660 if (sreloc == NULL)
1661 return FALSE;
1662 }
1663 elf_section_data (sec)->sreloc = sreloc;
1664 }
1665
1666 /* If this is a global symbol, we count the number of
1667 relocations we need for this symbol. */
1668 if (h != NULL)
1669 head = &((struct elf_or1k_link_hash_entry *) h)->dyn_relocs;
1670 else
1671 {
1672 /* Track dynamic relocs needed for local syms too.
1673 We really need local syms available to do this
1674 easily. Oh well. */
1675
1676 asection *s;
1677 Elf_Internal_Sym *isym;
1678 void *vpp;
1679
1680 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
1681 abfd, r_symndx);
1682 if (isym == NULL)
1683 return FALSE;
1684
1685 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1686 if (s == NULL)
1687 return FALSE;
1688
1689 vpp = &elf_section_data (s)->local_dynrel;
1690 head = (struct elf_or1k_dyn_relocs **) vpp;
1691 }
1692
1693 p = *head;
1694 if (p == NULL || p->sec != sec)
1695 {
1696 bfd_size_type amt = sizeof *p;
1697 p = ((struct elf_or1k_dyn_relocs *)
1698 bfd_alloc (htab->root.dynobj, amt));
1699 if (p == NULL)
1700 return FALSE;
1701 p->next = *head;
1702 *head = p;
1703 p->sec = sec;
1704 p->count = 0;
1705 p->pc_count = 0;
1706 }
1707
1708 p->count += 1;
1709 if (ELF32_R_TYPE (rel->r_info) == R_OR1K_INSN_REL_26)
1710 p->pc_count += 1;
1711 }
1712 }
1713 break;
1714 }
1715 }
1716
1717 return TRUE;
1718 }
1719
1720 /* Finish up the dynamic sections. */
1721
1722 static bfd_boolean
1723 or1k_elf_finish_dynamic_sections (bfd *output_bfd,
1724 struct bfd_link_info *info)
1725 {
1726 bfd *dynobj;
1727 asection *sdyn, *sgot;
1728 struct elf_or1k_link_hash_table *htab;
1729
1730 htab = or1k_elf_hash_table (info);
1731 if (htab == NULL)
1732 return FALSE;
1733
1734 dynobj = htab->root.dynobj;
1735
1736 sgot = htab->sgotplt;
1737 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1738
1739 if (htab->root.dynamic_sections_created)
1740 {
1741 asection *splt;
1742 Elf32_External_Dyn *dyncon, *dynconend;
1743
1744 BFD_ASSERT (sgot != NULL && sdyn != NULL);
1745
1746 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1747 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1748
1749 for (; dyncon < dynconend; dyncon++)
1750 {
1751 Elf_Internal_Dyn dyn;
1752 asection *s;
1753
1754 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1755
1756 switch (dyn.d_tag)
1757 {
1758 default:
1759 continue;
1760
1761 case DT_PLTGOT:
1762 s = htab->sgot->output_section;
1763 BFD_ASSERT (s != NULL);
1764 dyn.d_un.d_ptr = s->vma;
1765 break;
1766
1767 case DT_JMPREL:
1768 s = htab->srelplt->output_section;
1769 BFD_ASSERT (s != NULL);
1770 dyn.d_un.d_ptr = s->vma;
1771 break;
1772
1773 case DT_PLTRELSZ:
1774 s = htab->srelplt->output_section;
1775 BFD_ASSERT (s != NULL);
1776 dyn.d_un.d_val = s->size;
1777 break;
1778
1779 case DT_RELASZ:
1780 /* My reading of the SVR4 ABI indicates that the
1781 procedure linkage table relocs (DT_JMPREL) should be
1782 included in the overall relocs (DT_RELA). This is
1783 what Solaris does. However, UnixWare can not handle
1784 that case. Therefore, we override the DT_RELASZ entry
1785 here to make it not include the JMPREL relocs. Since
1786 the linker script arranges for .rela.plt to follow all
1787 other relocation sections, we don't have to worry
1788 about changing the DT_RELA entry. */
1789 if (htab->srelplt != NULL)
1790 {
1791 /* FIXME: this calculation sometimes produces
1792 wrong result, the problem is that the dyn.d_un.d_val
1793 is not always correct, needs investigation why
1794 that happens. In the meantime, reading the
1795 ".rela.dyn" section by name seems to yield
1796 correct result.
1797
1798 s = htab->srelplt->output_section;
1799 dyn.d_un.d_val -= s->size;
1800 */
1801
1802 s = bfd_get_section_by_name (output_bfd, ".rela.dyn");
1803 dyn.d_un.d_val = s ? s->size : 0;
1804 }
1805 break;
1806 }
1807 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1808 }
1809
1810
1811 /* Fill in the first entry in the procedure linkage table. */
1812 splt = htab->splt;
1813 if (splt && splt->size > 0)
1814 {
1815 if (bfd_link_pic (info))
1816 {
1817 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0,
1818 splt->contents);
1819 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1,
1820 splt->contents + 4);
1821 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2,
1822 splt->contents + 8);
1823 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3,
1824 splt->contents + 12);
1825 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4,
1826 splt->contents + 16);
1827 }
1828 else
1829 {
1830 unsigned long addr;
1831 /* addr = .got + 4 */
1832 addr = sgot->output_section->vma + sgot->output_offset + 4;
1833 bfd_put_32 (output_bfd,
1834 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
1835 splt->contents);
1836 bfd_put_32 (output_bfd,
1837 PLT0_ENTRY_WORD1 | (addr & 0xffff),
1838 splt->contents + 4);
1839 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
1840 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
1841 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
1842 }
1843
1844 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
1845 }
1846 }
1847
1848 /* Set the first entry in the global offset table to the address of
1849 the dynamic section. */
1850 if (sgot && sgot->size > 0)
1851 {
1852 if (sdyn == NULL)
1853 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1854 else
1855 bfd_put_32 (output_bfd,
1856 sdyn->output_section->vma + sdyn->output_offset,
1857 sgot->contents);
1858 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1859 }
1860
1861 if (htab->sgot && htab->sgot->size > 0)
1862 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
1863
1864 return TRUE;
1865 }
1866
1867 /* Finish up dynamic symbol handling. We set the contents of various
1868 dynamic sections here. */
1869
1870 static bfd_boolean
1871 or1k_elf_finish_dynamic_symbol (bfd *output_bfd,
1872 struct bfd_link_info *info,
1873 struct elf_link_hash_entry *h,
1874 Elf_Internal_Sym *sym)
1875 {
1876 struct elf_or1k_link_hash_table *htab;
1877 bfd_byte *loc;
1878
1879 htab = or1k_elf_hash_table (info);
1880 if (htab == NULL)
1881 return FALSE;
1882
1883 if (h->plt.offset != (bfd_vma) -1)
1884 {
1885 asection *splt;
1886 asection *sgot;
1887 asection *srela;
1888
1889 bfd_vma plt_index;
1890 bfd_vma got_offset;
1891 bfd_vma got_addr;
1892 Elf_Internal_Rela rela;
1893
1894 /* This symbol has an entry in the procedure linkage table. Set
1895 it up. */
1896 BFD_ASSERT (h->dynindx != -1);
1897
1898 splt = htab->splt;
1899 sgot = htab->sgotplt;
1900 srela = htab->srelplt;
1901 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1902
1903 /* Get the index in the procedure linkage table which
1904 corresponds to this symbol. This is the index of this symbol
1905 in all the symbols for which we are making plt entries. The
1906 first entry in the procedure linkage table is reserved. */
1907 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1908
1909 /* Get the offset into the .got table of the entry that
1910 corresponds to this function. Each .got entry is 4 bytes.
1911 The first three are reserved. */
1912 got_offset = (plt_index + 3) * 4;
1913 got_addr = got_offset;
1914
1915 /* Fill in the entry in the procedure linkage table. */
1916 if (! bfd_link_pic (info))
1917 {
1918 got_addr += htab->sgotplt->output_section->vma
1919 + htab->sgotplt->output_offset;
1920 bfd_put_32 (output_bfd, PLT_ENTRY_WORD0 | ((got_addr >> 16) & 0xffff),
1921 splt->contents + h->plt.offset);
1922 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1 | (got_addr & 0xffff),
1923 splt->contents + h->plt.offset + 4);
1924 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
1925 splt->contents + h->plt.offset + 8);
1926 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
1927 splt->contents + h->plt.offset + 12);
1928 bfd_put_32 (output_bfd, PLT_ENTRY_WORD4
1929 | plt_index * sizeof (Elf32_External_Rela),
1930 splt->contents + h->plt.offset + 16);
1931 }
1932 else
1933 {
1934 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0 | (got_addr & 0xffff),
1935 splt->contents + h->plt.offset);
1936 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1
1937 | plt_index * sizeof (Elf32_External_Rela),
1938 splt->contents + h->plt.offset + 4);
1939 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
1940 splt->contents + h->plt.offset + 8);
1941 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
1942 splt->contents + h->plt.offset + 12);
1943 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
1944 splt->contents + h->plt.offset + 16);
1945 }
1946
1947 /* Fill in the entry in the global offset table. */
1948 bfd_put_32 (output_bfd,
1949 (splt->output_section->vma
1950 + splt->output_offset), /* Same offset. */
1951 sgot->contents + got_offset);
1952
1953 /* Fill in the entry in the .rela.plt section. */
1954 rela.r_offset = (sgot->output_section->vma
1955 + sgot->output_offset
1956 + got_offset);
1957 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_JMP_SLOT);
1958 rela.r_addend = 0;
1959 loc = srela->contents;
1960 loc += plt_index * sizeof (Elf32_External_Rela);
1961 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1962
1963 if (!h->def_regular)
1964 {
1965 /* Mark the symbol as undefined, rather than as defined in
1966 the .plt section. Leave the value alone. */
1967 sym->st_shndx = SHN_UNDEF;
1968 }
1969
1970 }
1971
1972 if (h->got.offset != (bfd_vma) -1
1973 && (h->got.offset & 2) == 0) /* Homemade TLS check. */
1974 {
1975 asection *sgot;
1976 asection *srela;
1977 Elf_Internal_Rela rela;
1978
1979 /* This symbol has an entry in the global offset table. Set it
1980 up. */
1981 sgot = htab->sgot;
1982 srela = htab->srelgot;
1983 BFD_ASSERT (sgot != NULL && srela != NULL);
1984
1985 rela.r_offset = (sgot->output_section->vma
1986 + sgot->output_offset
1987 + (h->got.offset &~ 1));
1988
1989 /* If this is a -Bsymbolic link, and the symbol is defined
1990 locally, we just want to emit a RELATIVE reloc. Likewise if
1991 the symbol was forced to be local because of a version file.
1992 The entry in the global offset table will already have been
1993 initialized in the relocate_section function. */
1994 if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
1995 {
1996 rela.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
1997 rela.r_addend = (h->root.u.def.value
1998 + h->root.u.def.section->output_section->vma
1999 + h->root.u.def.section->output_offset);
2000 }
2001 else
2002 {
2003 BFD_ASSERT ((h->got.offset & 1) == 0);
2004 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2005 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_GLOB_DAT);
2006 rela.r_addend = 0;
2007 }
2008
2009 loc = srela->contents;
2010 loc += srela->reloc_count * sizeof (Elf32_External_Rela);
2011 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2012 ++srela->reloc_count;
2013 }
2014
2015 if (h->needs_copy)
2016 {
2017 asection *s;
2018 Elf_Internal_Rela rela;
2019
2020 /* This symbols needs a copy reloc. Set it up. */
2021 BFD_ASSERT (h->dynindx != -1
2022 && (h->root.type == bfd_link_hash_defined
2023 || h->root.type == bfd_link_hash_defweak));
2024
2025 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2026 ".rela.bss");
2027 BFD_ASSERT (s != NULL);
2028
2029 rela.r_offset = (h->root.u.def.value
2030 + h->root.u.def.section->output_section->vma
2031 + h->root.u.def.section->output_offset);
2032 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_COPY);
2033 rela.r_addend = 0;
2034 loc = s->contents;
2035 loc += s->reloc_count * sizeof (Elf32_External_Rela);
2036 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2037 ++s->reloc_count;
2038 }
2039
2040 /* Mark some specially defined symbols as absolute. */
2041 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2042 || h == htab->root.hgot)
2043 sym->st_shndx = SHN_ABS;
2044
2045 return TRUE;
2046 }
2047
2048 static enum elf_reloc_type_class
2049 or1k_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2050 const asection *rel_sec ATTRIBUTE_UNUSED,
2051 const Elf_Internal_Rela *rela)
2052 {
2053 switch ((int) ELF32_R_TYPE (rela->r_info))
2054 {
2055 case R_OR1K_RELATIVE: return reloc_class_relative;
2056 case R_OR1K_JMP_SLOT: return reloc_class_plt;
2057 case R_OR1K_COPY: return reloc_class_copy;
2058 default: return reloc_class_normal;
2059 }
2060 }
2061
2062 /* Adjust a symbol defined by a dynamic object and referenced by a
2063 regular object. The current definition is in some section of the
2064 dynamic object, but we're not including those sections. We have to
2065 change the definition to something the rest of the link can
2066 understand. */
2067
2068 static bfd_boolean
2069 or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2070 struct elf_link_hash_entry *h)
2071 {
2072 struct elf_or1k_link_hash_table *htab;
2073 struct elf_or1k_link_hash_entry *eh;
2074 struct elf_or1k_dyn_relocs *p;
2075 bfd *dynobj;
2076 asection *s;
2077
2078 dynobj = elf_hash_table (info)->dynobj;
2079
2080 /* Make sure we know what is going on here. */
2081 BFD_ASSERT (dynobj != NULL
2082 && (h->needs_plt
2083 || h->u.weakdef != NULL
2084 || (h->def_dynamic
2085 && h->ref_regular
2086 && !h->def_regular)));
2087
2088 /* If this is a function, put it in the procedure linkage table. We
2089 will fill in the contents of the procedure linkage table later,
2090 when we know the address of the .got section. */
2091 if (h->type == STT_FUNC
2092 || h->needs_plt)
2093 {
2094 if (! bfd_link_pic (info)
2095 && !h->def_dynamic
2096 && !h->ref_dynamic
2097 && h->root.type != bfd_link_hash_undefweak
2098 && h->root.type != bfd_link_hash_undefined)
2099 {
2100 /* This case can occur if we saw a PLT reloc in an input
2101 file, but the symbol was never referred to by a dynamic
2102 object. In such a case, we don't actually need to build
2103 a procedure linkage table, and we can just do a PCREL
2104 reloc instead. */
2105 h->plt.offset = (bfd_vma) -1;
2106 h->needs_plt = 0;
2107 }
2108
2109 return TRUE;
2110 }
2111 else
2112 h->plt.offset = (bfd_vma) -1;
2113
2114 /* If this is a weak symbol, and there is a real definition, the
2115 processor independent code will have arranged for us to see the
2116 real definition first, and we can just use the same value. */
2117 if (h->u.weakdef != NULL)
2118 {
2119 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2120 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2121 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2122 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2123 return TRUE;
2124 }
2125
2126 /* This is a reference to a symbol defined by a dynamic object which
2127 is not a function. */
2128
2129 /* If we are creating a shared library, we must presume that the
2130 only references to the symbol are via the global offset table.
2131 For such cases we need not do anything here; the relocations will
2132 be handled correctly by relocate_section. */
2133 if (bfd_link_pic (info))
2134 return TRUE;
2135
2136 /* If there are no references to this symbol that do not use the
2137 GOT, we don't need to generate a copy reloc. */
2138 if (!h->non_got_ref)
2139 return TRUE;
2140
2141 /* If -z nocopyreloc was given, we won't generate them either. */
2142 if (info->nocopyreloc)
2143 {
2144 h->non_got_ref = 0;
2145 return TRUE;
2146 }
2147
2148 eh = (struct elf_or1k_link_hash_entry *) h;
2149 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2150 {
2151 s = p->sec->output_section;
2152 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
2153 break;
2154 }
2155
2156 /* If we didn't find any dynamic relocs in sections which needs the
2157 copy reloc, then we'll be keeping the dynamic relocs and avoiding
2158 the copy reloc. */
2159 if (p == NULL)
2160 {
2161 h->non_got_ref = 0;
2162 return TRUE;
2163 }
2164
2165 /* We must allocate the symbol in our .dynbss section, which will
2166 become part of the .bss section of the executable. There will be
2167 an entry for this symbol in the .dynsym section. The dynamic
2168 object will contain position independent code, so all references
2169 from the dynamic object to this symbol will go through the global
2170 offset table. The dynamic linker will use the .dynsym entry to
2171 determine the address it must put in the global offset table, so
2172 both the dynamic object and the regular object will refer to the
2173 same memory location for the variable. */
2174
2175 htab = or1k_elf_hash_table (info);
2176 if (htab == NULL)
2177 return FALSE;
2178
2179 s = htab->sdynbss;
2180 BFD_ASSERT (s != NULL);
2181
2182 /* We must generate a R_OR1K_COPY reloc to tell the dynamic linker
2183 to copy the initial value out of the dynamic object and into the
2184 runtime process image. We need to remember the offset into the
2185 .rela.bss section we are going to use. */
2186 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2187 {
2188 asection *srel;
2189
2190 srel = htab->srelbss;
2191 BFD_ASSERT (srel != NULL);
2192 srel->size += sizeof (Elf32_External_Rela);
2193 h->needs_copy = 1;
2194 }
2195
2196 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2197 }
2198
2199 /* Allocate space in .plt, .got and associated reloc sections for
2200 dynamic relocs. */
2201
2202 static bfd_boolean
2203 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2204 {
2205 struct bfd_link_info *info;
2206 struct elf_or1k_link_hash_table *htab;
2207 struct elf_or1k_link_hash_entry *eh;
2208 struct elf_or1k_dyn_relocs *p;
2209
2210 if (h->root.type == bfd_link_hash_indirect)
2211 return TRUE;
2212
2213 info = (struct bfd_link_info *) inf;
2214 htab = or1k_elf_hash_table (info);
2215 if (htab == NULL)
2216 return FALSE;
2217
2218 eh = (struct elf_or1k_link_hash_entry *) h;
2219
2220 if (htab->root.dynamic_sections_created
2221 && h->plt.refcount > 0)
2222 {
2223 /* Make sure this symbol is output as a dynamic symbol.
2224 Undefined weak syms won't yet be marked as dynamic. */
2225 if (h->dynindx == -1
2226 && !h->forced_local)
2227 {
2228 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2229 return FALSE;
2230 }
2231
2232 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
2233 {
2234 asection *s = htab->splt;
2235
2236 /* If this is the first .plt entry, make room for the special
2237 first entry. */
2238 if (s->size == 0)
2239 s->size = PLT_ENTRY_SIZE;
2240
2241 h->plt.offset = s->size;
2242
2243 /* If this symbol is not defined in a regular file, and we are
2244 not generating a shared library, then set the symbol to this
2245 location in the .plt. This is required to make function
2246 pointers compare as equal between the normal executable and
2247 the shared library. */
2248 if (! bfd_link_pic (info)
2249 && !h->def_regular)
2250 {
2251 h->root.u.def.section = s;
2252 h->root.u.def.value = h->plt.offset;
2253 }
2254
2255 /* Make room for this entry. */
2256 s->size += PLT_ENTRY_SIZE;
2257
2258 /* We also need to make an entry in the .got.plt section, which
2259 will be placed in the .got section by the linker script. */
2260 htab->sgotplt->size += 4;
2261
2262 /* We also need to make an entry in the .rel.plt section. */
2263 htab->srelplt->size += sizeof (Elf32_External_Rela);
2264 }
2265 else
2266 {
2267 h->plt.offset = (bfd_vma) -1;
2268 h->needs_plt = 0;
2269 }
2270 }
2271 else
2272 {
2273 h->plt.offset = (bfd_vma) -1;
2274 h->needs_plt = 0;
2275 }
2276
2277 if (h->got.refcount > 0)
2278 {
2279 asection *s;
2280 bfd_boolean dyn;
2281 unsigned char tls_type;
2282
2283 /* Make sure this symbol is output as a dynamic symbol.
2284 Undefined weak syms won't yet be marked as dynamic. */
2285 if (h->dynindx == -1
2286 && !h->forced_local)
2287 {
2288 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2289 return FALSE;
2290 }
2291
2292 s = htab->sgot;
2293
2294 h->got.offset = s->size;
2295
2296 tls_type = ((struct elf_or1k_link_hash_entry *) h)->tls_type;
2297
2298 /* TLS GD requires two GOT and two relocs. */
2299 if (tls_type == TLS_GD)
2300 s->size += 8;
2301 else
2302 s->size += 4;
2303 dyn = htab->root.dynamic_sections_created;
2304 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h))
2305 {
2306 if (tls_type == TLS_GD)
2307 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2308 else
2309 htab->srelgot->size += sizeof (Elf32_External_Rela);
2310 }
2311 }
2312 else
2313 h->got.offset = (bfd_vma) -1;
2314
2315 if (eh->dyn_relocs == NULL)
2316 return TRUE;
2317
2318 /* In the shared -Bsymbolic case, discard space allocated for
2319 dynamic pc-relative relocs against symbols which turn out to be
2320 defined in regular objects. For the normal shared case, discard
2321 space for pc-relative relocs that have become local due to symbol
2322 visibility changes. */
2323
2324 if (bfd_link_pic (info))
2325 {
2326 if (SYMBOL_CALLS_LOCAL (info, h))
2327 {
2328 struct elf_or1k_dyn_relocs **pp;
2329
2330 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
2331 {
2332 p->count -= p->pc_count;
2333 p->pc_count = 0;
2334 if (p->count == 0)
2335 *pp = p->next;
2336 else
2337 pp = &p->next;
2338 }
2339 }
2340
2341 /* Also discard relocs on undefined weak syms with non-default
2342 visibility. */
2343 if (eh->dyn_relocs != NULL
2344 && h->root.type == bfd_link_hash_undefweak)
2345 {
2346 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2347 eh->dyn_relocs = NULL;
2348
2349 /* Make sure undefined weak symbols are output as a dynamic
2350 symbol in PIEs. */
2351 else if (h->dynindx == -1
2352 && !h->forced_local)
2353 {
2354 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2355 return FALSE;
2356 }
2357 }
2358 }
2359 else
2360 {
2361 /* For the non-shared case, discard space for relocs against
2362 symbols which turn out to need copy relocs or are not
2363 dynamic. */
2364
2365 if (!h->non_got_ref
2366 && ((h->def_dynamic
2367 && !h->def_regular)
2368 || (htab->root.dynamic_sections_created
2369 && (h->root.type == bfd_link_hash_undefweak
2370 || h->root.type == bfd_link_hash_undefined))))
2371 {
2372 /* Make sure this symbol is output as a dynamic symbol.
2373 Undefined weak syms won't yet be marked as dynamic. */
2374 if (h->dynindx == -1
2375 && !h->forced_local)
2376 {
2377 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2378 return FALSE;
2379 }
2380
2381 /* If that succeeded, we know we'll be keeping all the
2382 relocs. */
2383 if (h->dynindx != -1)
2384 goto keep;
2385 }
2386
2387 eh->dyn_relocs = NULL;
2388
2389 keep: ;
2390 }
2391
2392 /* Finally, allocate space. */
2393 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2394 {
2395 asection *sreloc = elf_section_data (p->sec)->sreloc;
2396 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2397 }
2398
2399 return TRUE;
2400 }
2401
2402 /* Find any dynamic relocs that apply to read-only sections. */
2403
2404 static bfd_boolean
2405 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2406 {
2407 struct elf_or1k_link_hash_entry *eh;
2408 struct elf_or1k_dyn_relocs *p;
2409
2410 eh = (struct elf_or1k_link_hash_entry *) h;
2411 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2412 {
2413 asection *s = p->sec->output_section;
2414
2415 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2416 {
2417 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2418
2419 info->flags |= DF_TEXTREL;
2420
2421 /* Not an error, just cut short the traversal. */
2422 return FALSE;
2423 }
2424 }
2425 return TRUE;
2426 }
2427
2428 /* Set the sizes of the dynamic sections. */
2429
2430 static bfd_boolean
2431 or1k_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2432 struct bfd_link_info *info)
2433 {
2434 struct elf_or1k_link_hash_table *htab;
2435 bfd *dynobj;
2436 asection *s;
2437 bfd_boolean relocs;
2438 bfd *ibfd;
2439
2440 htab = or1k_elf_hash_table (info);
2441 if (htab == NULL)
2442 return FALSE;
2443
2444 dynobj = htab->root.dynobj;
2445 BFD_ASSERT (dynobj != NULL);
2446
2447 if (htab->root.dynamic_sections_created)
2448 {
2449 /* Set the contents of the .interp section to the interpreter. */
2450 if (bfd_link_executable (info) && !info->nointerp)
2451 {
2452 s = bfd_get_section_by_name (dynobj, ".interp");
2453 BFD_ASSERT (s != NULL);
2454 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2455 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2456 }
2457 }
2458
2459 /* Set up .got offsets for local syms, and space for local dynamic
2460 relocs. */
2461 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2462 {
2463 bfd_signed_vma *local_got;
2464 bfd_signed_vma *end_local_got;
2465 bfd_size_type locsymcount;
2466 Elf_Internal_Shdr *symtab_hdr;
2467 unsigned char *local_tls_type;
2468 asection *srel;
2469
2470 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2471 continue;
2472
2473 for (s = ibfd->sections; s != NULL; s = s->next)
2474 {
2475 struct elf_or1k_dyn_relocs *p;
2476
2477 for (p = ((struct elf_or1k_dyn_relocs *)
2478 elf_section_data (s)->local_dynrel);
2479 p != NULL;
2480 p = p->next)
2481 {
2482 if (! bfd_is_abs_section (p->sec)
2483 && bfd_is_abs_section (p->sec->output_section))
2484 {
2485 /* Input section has been discarded, either because
2486 it is a copy of a linkonce section or due to
2487 linker script /DISCARD/, so we'll be discarding
2488 the relocs too. */
2489 }
2490 else if (p->count != 0)
2491 {
2492 srel = elf_section_data (p->sec)->sreloc;
2493 srel->size += p->count * sizeof (Elf32_External_Rela);
2494 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2495 info->flags |= DF_TEXTREL;
2496 }
2497 }
2498 }
2499
2500 local_got = elf_local_got_refcounts (ibfd);
2501 if (!local_got)
2502 continue;
2503
2504 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2505 locsymcount = symtab_hdr->sh_info;
2506 end_local_got = local_got + locsymcount;
2507 s = htab->sgot;
2508 srel = htab->srelgot;
2509 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (ibfd);
2510 for (; local_got < end_local_got; ++local_got)
2511 {
2512 if (*local_got > 0)
2513 {
2514 *local_got = s->size;
2515
2516 /* TLS GD requires two GOT and two relocs. */
2517 if (local_tls_type != NULL && *local_tls_type == TLS_GD)
2518 s->size += 8;
2519 else
2520 s->size += 4;
2521 if (bfd_link_pic (info))
2522 {
2523 if (local_tls_type != NULL && *local_tls_type == TLS_GD)
2524 srel->size += 2 * sizeof (Elf32_External_Rela);
2525 else
2526 srel->size += sizeof (Elf32_External_Rela);
2527 }
2528 }
2529 else
2530
2531 *local_got = (bfd_vma) -1;
2532
2533 if (local_tls_type)
2534 ++local_tls_type;
2535 }
2536 }
2537
2538 /* Allocate global sym .plt and .got entries, and space for global
2539 sym dynamic relocs. */
2540 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
2541
2542 /* We now have determined the sizes of the various dynamic sections.
2543 Allocate memory for them. */
2544 relocs = FALSE;
2545 for (s = dynobj->sections; s != NULL; s = s->next)
2546 {
2547 if ((s->flags & SEC_LINKER_CREATED) == 0)
2548 continue;
2549
2550 if (s == htab->splt
2551 || s == htab->sgot
2552 || s == htab->sgotplt
2553 || s == htab->sdynbss)
2554 {
2555 /* Strip this section if we don't need it; see the
2556 comment below. */
2557 }
2558 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2559 {
2560 if (s->size != 0 && s != htab->srelplt)
2561 relocs = TRUE;
2562
2563 /* We use the reloc_count field as a counter if we need
2564 to copy relocs into the output file. */
2565 s->reloc_count = 0;
2566 }
2567 else
2568 /* It's not one of our sections, so don't allocate space. */
2569 continue;
2570
2571 if (s->size == 0)
2572 {
2573 /* If we don't need this section, strip it from the
2574 output file. This is mostly to handle .rela.bss and
2575 .rela.plt. We must create both sections in
2576 create_dynamic_sections, because they must be created
2577 before the linker maps input sections to output
2578 sections. The linker does that before
2579 adjust_dynamic_symbol is called, and it is that
2580 function which decides whether anything needs to go
2581 into these sections. */
2582 s->flags |= SEC_EXCLUDE;
2583 continue;
2584 }
2585
2586 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2587 continue;
2588
2589 /* Allocate memory for the section contents. We use bfd_zalloc
2590 here in case unused entries are not reclaimed before the
2591 section's contents are written out. This should not happen,
2592 but this way if it does, we get a R_OR1K_NONE reloc instead
2593 of garbage. */
2594 s->contents = bfd_zalloc (dynobj, s->size);
2595
2596 if (s->contents == NULL)
2597 return FALSE;
2598 }
2599
2600 if (htab->root.dynamic_sections_created)
2601 {
2602 /* Add some entries to the .dynamic section. We fill in the
2603 values later, in or1k_elf_finish_dynamic_sections, but we
2604 must add the entries now so that we get the correct size for
2605 the .dynamic section. The DT_DEBUG entry is filled in by the
2606 dynamic linker and used by the debugger. */
2607 #define add_dynamic_entry(TAG, VAL) \
2608 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2609
2610 if (bfd_link_executable (info))
2611 {
2612 if (! add_dynamic_entry (DT_DEBUG, 0))
2613 return FALSE;
2614 }
2615
2616 if (htab->splt->size != 0)
2617 {
2618 if (! add_dynamic_entry (DT_PLTGOT, 0)
2619 || ! add_dynamic_entry (DT_PLTRELSZ, 0)
2620 || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
2621 || ! add_dynamic_entry (DT_JMPREL, 0))
2622 return FALSE;
2623 }
2624
2625 if (relocs)
2626 {
2627 if (! add_dynamic_entry (DT_RELA, 0)
2628 || ! add_dynamic_entry (DT_RELASZ, 0)
2629 || ! add_dynamic_entry (DT_RELAENT,
2630 sizeof (Elf32_External_Rela)))
2631 return FALSE;
2632
2633 /* If any dynamic relocs apply to a read-only section,
2634 then we need a DT_TEXTREL entry. */
2635 if ((info->flags & DF_TEXTREL) == 0)
2636 elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
2637 info);
2638
2639 if ((info->flags & DF_TEXTREL) != 0)
2640 {
2641 if (! add_dynamic_entry (DT_TEXTREL, 0))
2642 return FALSE;
2643 }
2644 }
2645 }
2646
2647 #undef add_dynamic_entry
2648 return TRUE;
2649 }
2650
2651 /* Create dynamic sections when linking against a dynamic object. */
2652
2653 static bfd_boolean
2654 or1k_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2655 {
2656 struct elf_or1k_link_hash_table *htab;
2657
2658 htab = or1k_elf_hash_table (info);
2659 if (htab == NULL)
2660 return FALSE;
2661
2662 if (!htab->sgot && !create_got_section (dynobj, info))
2663 return FALSE;
2664
2665 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2666 return FALSE;
2667
2668 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2669 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
2670 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2671 if (!bfd_link_pic (info))
2672 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
2673
2674 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2675 || (!bfd_link_pic (info) && !htab->srelbss))
2676 abort ();
2677
2678 return TRUE;
2679 }
2680
2681 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2682
2683 static void
2684 or1k_elf_copy_indirect_symbol (struct bfd_link_info *info,
2685 struct elf_link_hash_entry *dir,
2686 struct elf_link_hash_entry *ind)
2687 {
2688 struct elf_or1k_link_hash_entry * edir;
2689 struct elf_or1k_link_hash_entry * eind;
2690
2691 edir = (struct elf_or1k_link_hash_entry *) dir;
2692 eind = (struct elf_or1k_link_hash_entry *) ind;
2693
2694 if (eind->dyn_relocs != NULL)
2695 {
2696 if (edir->dyn_relocs != NULL)
2697 {
2698 struct elf_or1k_dyn_relocs **pp;
2699 struct elf_or1k_dyn_relocs *p;
2700
2701 /* Add reloc counts against the indirect sym to the direct sym
2702 list. Merge any entries against the same section. */
2703 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2704 {
2705 struct elf_or1k_dyn_relocs *q;
2706
2707 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2708 if (q->sec == p->sec)
2709 {
2710 q->pc_count += p->pc_count;
2711 q->count += p->count;
2712 *pp = p->next;
2713 break;
2714 }
2715 if (q == NULL)
2716 pp = &p->next;
2717 }
2718 *pp = edir->dyn_relocs;
2719 }
2720
2721 edir->dyn_relocs = eind->dyn_relocs;
2722 eind->dyn_relocs = NULL;
2723 }
2724
2725 if (ind->root.type == bfd_link_hash_indirect)
2726 {
2727 if (dir->got.refcount <= 0)
2728 {
2729 edir->tls_type = eind->tls_type;
2730 eind->tls_type = TLS_UNKNOWN;
2731 }
2732 }
2733
2734 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2735 }
2736
2737 /* Set the right machine number. */
2738
2739 static bfd_boolean
2740 or1k_elf_object_p (bfd *abfd)
2741 {
2742 unsigned long mach = bfd_mach_or1k;
2743
2744 if (elf_elfheader (abfd)->e_flags & EF_OR1K_NODELAY)
2745 mach = bfd_mach_or1knd;
2746
2747 return bfd_default_set_arch_mach (abfd, bfd_arch_or1k, mach);
2748 }
2749
2750 /* Store the machine number in the flags field. */
2751
2752 static void
2753 or1k_elf_final_write_processing (bfd *abfd,
2754 bfd_boolean linker ATTRIBUTE_UNUSED)
2755 {
2756 switch (bfd_get_mach (abfd))
2757 {
2758 default:
2759 case bfd_mach_or1k:
2760 break;
2761 case bfd_mach_or1knd:
2762 elf_elfheader (abfd)->e_flags |= EF_OR1K_NODELAY;
2763 break;
2764 }
2765 }
2766
2767 static bfd_boolean
2768 or1k_elf_set_private_flags (bfd *abfd, flagword flags)
2769 {
2770 BFD_ASSERT (!elf_flags_init (abfd)
2771 || elf_elfheader (abfd)->e_flags == flags);
2772
2773 elf_elfheader (abfd)->e_flags = flags;
2774 elf_flags_init (abfd) = TRUE;
2775 return TRUE;
2776 }
2777
2778 /* Make sure all input files are consistent with respect to
2779 EF_OR1K_NODELAY flag setting. */
2780
2781 static bfd_boolean
2782 elf32_or1k_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2783 {
2784 flagword out_flags;
2785 flagword in_flags;
2786
2787 in_flags = elf_elfheader (ibfd)->e_flags;
2788 out_flags = elf_elfheader (obfd)->e_flags;
2789
2790 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2791 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2792 return TRUE;
2793
2794 if (!elf_flags_init (obfd))
2795 {
2796 elf_flags_init (obfd) = TRUE;
2797 elf_elfheader (obfd)->e_flags = in_flags;
2798
2799 return TRUE;
2800 }
2801
2802 if (in_flags == out_flags)
2803 return TRUE;
2804
2805 if ((in_flags & EF_OR1K_NODELAY) != (out_flags & EF_OR1K_NODELAY))
2806 {
2807 (*_bfd_error_handler)
2808 (_("%B: EF_OR1K_NODELAY flag mismatch with previous modules"), ibfd);
2809
2810 bfd_set_error (bfd_error_bad_value);
2811 return FALSE;
2812 }
2813
2814 return TRUE;
2815
2816 }
2817
2818 #define ELF_ARCH bfd_arch_or1k
2819 #define ELF_MACHINE_CODE EM_OR1K
2820 #define ELF_TARGET_ID OR1K_ELF_DATA
2821 #define ELF_MAXPAGESIZE 0x2000
2822
2823 #define TARGET_BIG_SYM or1k_elf32_vec
2824 #define TARGET_BIG_NAME "elf32-or1k"
2825
2826 #define elf_info_to_howto_rel NULL
2827 #define elf_info_to_howto or1k_info_to_howto_rela
2828 #define elf_backend_relocate_section or1k_elf_relocate_section
2829 #define elf_backend_gc_mark_hook or1k_elf_gc_mark_hook
2830 #define elf_backend_gc_sweep_hook or1k_elf_gc_sweep_hook
2831 #define elf_backend_check_relocs or1k_elf_check_relocs
2832 #define elf_backend_reloc_type_class or1k_elf_reloc_type_class
2833 #define elf_backend_can_gc_sections 1
2834 #define elf_backend_rela_normal 1
2835
2836 #define bfd_elf32_mkobject elf_or1k_mkobject
2837
2838 #define bfd_elf32_bfd_merge_private_bfd_data elf32_or1k_merge_private_bfd_data
2839 #define bfd_elf32_bfd_set_private_flags or1k_elf_set_private_flags
2840 #define bfd_elf32_bfd_reloc_type_lookup or1k_reloc_type_lookup
2841 #define bfd_elf32_bfd_reloc_name_lookup or1k_reloc_name_lookup
2842
2843 #define elf_backend_object_p or1k_elf_object_p
2844 #define elf_backend_final_write_processing or1k_elf_final_write_processing
2845 #define elf_backend_can_refcount 1
2846
2847 #define elf_backend_plt_readonly 1
2848 #define elf_backend_want_got_plt 1
2849 #define elf_backend_want_plt_sym 0
2850 #define elf_backend_got_header_size 12
2851 #define bfd_elf32_bfd_link_hash_table_create or1k_elf_link_hash_table_create
2852 #define elf_backend_copy_indirect_symbol or1k_elf_copy_indirect_symbol
2853 #define elf_backend_create_dynamic_sections or1k_elf_create_dynamic_sections
2854 #define elf_backend_finish_dynamic_sections or1k_elf_finish_dynamic_sections
2855 #define elf_backend_size_dynamic_sections or1k_elf_size_dynamic_sections
2856 #define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol
2857 #define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol
2858
2859 #include "elf32-target.h"
The GNU Binutils are a collection of binary tools.