projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Remove support for the (deprecated) openrisc and or32 configurations and replace
[deliverable/binutils-gdb.git] / bfd / elf32-or1k.c
1 /* Or1k-specific support for 32-bit ELF.
2 Copyright 2001-2014 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 2, /* size (0 = byte, 1 = short, 2 = long) */
64 32, /* 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 FALSE), /* 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 FALSE), /* 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 FALSE), /* 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 BFD_ASSERT (r_type < (unsigned int) R_OR1K_max);
742 cache_ptr->howto = & or1k_elf_howto_table[r_type];
743 }
744
745
746 /* Return the relocation value for @tpoff relocations.. */
747 static bfd_vma
748 tpoff (struct bfd_link_info *info, bfd_vma address)
749 {
750 /* If tls_sec is NULL, we should have signalled an error already. */
751 if (elf_hash_table (info)->tls_sec == NULL)
752 return 0;
753
754 /* The thread pointer on or1k stores the address after the TCB where
755 the data is, just compute the difference. No need to compensate
756 for the size of TCB. */
757 return (address - elf_hash_table (info)->tls_sec->vma);
758 }
759
760 /* Relocate an Or1k ELF section.
761
762 The RELOCATE_SECTION function is called by the new ELF backend linker
763 to handle the relocations for a section.
764
765 The relocs are always passed as Rela structures; if the section
766 actually uses Rel structures, the r_addend field will always be
767 zero.
768
769 This function is responsible for adjusting the section contents as
770 necessary, and (if using Rela relocs and generating a relocatable
771 output file) adjusting the reloc addend as necessary.
772
773 This function does not have to worry about setting the reloc
774 address or the reloc symbol index.
775
776 LOCAL_SYMS is a pointer to the swapped in local symbols.
777
778 LOCAL_SECTIONS is an array giving the section in the input file
779 corresponding to the st_shndx field of each local symbol.
780
781 The global hash table entry for the global symbols can be found
782 via elf_sym_hashes (input_bfd).
783
784 When generating relocatable output, this function must handle
785 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
786 going to be the section symbol corresponding to the output
787 section, which means that the addend must be adjusted
788 accordingly. */
789
790 static bfd_boolean
791 or1k_elf_relocate_section (bfd *output_bfd,
792 struct bfd_link_info *info,
793 bfd *input_bfd,
794 asection *input_section,
795 bfd_byte *contents,
796 Elf_Internal_Rela *relocs,
797 Elf_Internal_Sym *local_syms,
798 asection **local_sections)
799 {
800 Elf_Internal_Shdr *symtab_hdr;
801 struct elf_link_hash_entry **sym_hashes;
802 Elf_Internal_Rela *rel;
803 Elf_Internal_Rela *relend;
804 struct elf_or1k_link_hash_table *htab = or1k_elf_hash_table (info);
805 bfd *dynobj;
806 asection *sreloc;
807 bfd_vma *local_got_offsets;
808 asection *sgot;
809
810 if (htab == NULL)
811 return FALSE;
812
813 dynobj = htab->root.dynobj;
814 local_got_offsets = elf_local_got_offsets (input_bfd);
815
816 sreloc = elf_section_data (input_section)->sreloc;
817
818 sgot = htab->sgot;
819
820 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
821 sym_hashes = elf_sym_hashes (input_bfd);
822 relend = relocs + input_section->reloc_count;
823
824 for (rel = relocs; rel < relend; rel++)
825 {
826 reloc_howto_type *howto;
827 unsigned long r_symndx;
828 Elf_Internal_Sym *sym;
829 asection *sec;
830 struct elf_link_hash_entry *h;
831 bfd_vma relocation;
832 bfd_reloc_status_type r;
833 const char *name = NULL;
834 int r_type;
835
836 r_type = ELF32_R_TYPE (rel->r_info);
837 r_symndx = ELF32_R_SYM (rel->r_info);
838
839 if (r_type == R_OR1K_GNU_VTINHERIT
840 || r_type == R_OR1K_GNU_VTENTRY)
841 continue;
842
843 if (r_type < 0 || r_type >= (int) R_OR1K_max)
844 {
845 bfd_set_error (bfd_error_bad_value);
846 return FALSE;
847 }
848
849 howto = or1k_elf_howto_table + ELF32_R_TYPE (rel->r_info);
850 h = NULL;
851 sym = NULL;
852 sec = NULL;
853
854 if (r_symndx < symtab_hdr->sh_info)
855 {
856 sym = local_syms + r_symndx;
857 sec = local_sections[r_symndx];
858 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
859
860 name = bfd_elf_string_from_elf_section
861 (input_bfd, symtab_hdr->sh_link, sym->st_name);
862 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
863 }
864 else
865 {
866 bfd_boolean unresolved_reloc, warned, ignored;
867
868 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
869 r_symndx, symtab_hdr, sym_hashes,
870 h, sec, relocation,
871 unresolved_reloc, warned, ignored);
872 }
873
874 if (sec != NULL && discarded_section (sec))
875 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
876 rel, 1, relend, howto, 0, contents);
877
878 if (info->relocatable)
879 continue;
880
881 switch (howto->type)
882 {
883 case R_OR1K_PLT26:
884 {
885 if (htab->splt != NULL && h != NULL
886 && h->plt.offset != (bfd_vma) -1)
887 {
888 relocation = (htab->splt->output_section->vma
889 + htab->splt->output_offset
890 + h->plt.offset);
891 }
892 break;
893 }
894
895 case R_OR1K_GOT16:
896 /* Relocation is to the entry for this symbol in the global
897 offset table. */
898 BFD_ASSERT (sgot != NULL);
899 if (h != NULL)
900 {
901 bfd_boolean dyn;
902 bfd_vma off;
903
904 off = h->got.offset;
905 BFD_ASSERT (off != (bfd_vma) -1);
906
907 dyn = htab->root.dynamic_sections_created;
908 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
909 || (info->shared
910 && (info->symbolic
911 || h->dynindx == -1
912 || h->forced_local)
913 && h->def_regular))
914 {
915 /* This is actually a static link, or it is a
916 -Bsymbolic link and the symbol is defined
917 locally, or the symbol was forced to be local
918 because of a version file. We must initialize
919 this entry in the global offset table. Since the
920 offset must always be a multiple of 4, we use the
921 least significant bit to record whether we have
922 initialized it already.
923
924 When doing a dynamic link, we create a .rela.got
925 relocation entry to initialize the value. This
926 is done in the finish_dynamic_symbol routine. */
927 if ((off & 1) != 0)
928 off &= ~1;
929 else
930 {
931 /* Write entry in GOT. */
932 bfd_put_32 (output_bfd, relocation,
933 sgot->contents + off);
934 /* Mark GOT entry as having been written. */
935 h->got.offset |= 1;
936 }
937 }
938
939 relocation = sgot->output_offset + off;
940 }
941 else
942 {
943 bfd_vma off;
944 bfd_byte *loc;
945
946 BFD_ASSERT (local_got_offsets != NULL
947 && local_got_offsets[r_symndx] != (bfd_vma) -1);
948
949 /* Get offset into GOT table. */
950 off = local_got_offsets[r_symndx];
951
952 /* The offset must always be a multiple of 4. We use
953 the least significant bit to record whether we have
954 already processed this entry. */
955 if ((off & 1) != 0)
956 off &= ~1;
957 else
958 {
959 /* Write entry in GOT. */
960 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
961 if (info->shared)
962 {
963 asection *srelgot;
964 Elf_Internal_Rela outrel;
965
966 /* We need to generate a R_OR1K_RELATIVE reloc
967 for the dynamic linker. */
968 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
969 BFD_ASSERT (srelgot != NULL);
970
971 outrel.r_offset = (sgot->output_section->vma
972 + sgot->output_offset
973 + off);
974 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
975 outrel.r_addend = relocation;
976 loc = srelgot->contents;
977 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
978 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
979 ++srelgot->reloc_count;
980 }
981
982 local_got_offsets[r_symndx] |= 1;
983 }
984 relocation = sgot->output_offset + off;
985 }
986
987 /* Addend should be zero. */
988 if (rel->r_addend != 0)
989 (*_bfd_error_handler)
990 (_("internal error: addend should be zero for R_OR1K_GOT16"));
991
992 break;
993
994 case R_OR1K_GOTOFF_LO16:
995 case R_OR1K_GOTOFF_HI16:
996 /* Relocation is offset from GOT. */
997 BFD_ASSERT (sgot != NULL);
998 relocation -= sgot->output_section->vma;
999 break;
1000
1001 case R_OR1K_INSN_REL_26:
1002 case R_OR1K_HI_16_IN_INSN:
1003 case R_OR1K_LO_16_IN_INSN:
1004 case R_OR1K_32:
1005 /* R_OR1K_16? */
1006 {
1007 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1008 from removed linkonce sections, or sections discarded by
1009 a linker script. */
1010 if (r_symndx == STN_UNDEF
1011 || (input_section->flags & SEC_ALLOC) == 0)
1012 break;
1013
1014 if ((info->shared
1015 && (h == NULL
1016 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1017 || h->root.type != bfd_link_hash_undefweak)
1018 && (!howto->pc_relative
1019 || (h != NULL
1020 && h->dynindx != -1
1021 && (!info->symbolic
1022 || !h->def_regular))))
1023 || (!info->shared
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 /* Mark as TLS related GOT entry by setting
1116 bit 2 as well as bit 1. */
1117 if (h != NULL)
1118 {
1119 gotoff = h->got.offset;
1120 h->got.offset |= 3;
1121 }
1122 else
1123 {
1124 gotoff = local_got_offsets[r_symndx];
1125 local_got_offsets[r_symndx] |= 3;
1126 }
1127
1128 /* Only process the relocation once. */
1129 if (gotoff & 1)
1130 {
1131 relocation = sgot->output_offset + (gotoff & ~3);
1132 break;
1133 }
1134
1135 BFD_ASSERT (elf_hash_table (info)->hgot == NULL
1136 || elf_hash_table (info)->hgot->root.u.def.value == 0);
1137
1138 /* Dynamic entries will require relocations. if we do not need
1139 them we will just use the default R_OR1K_NONE and
1140 not set anything. */
1141 dynamic = info->shared
1142 || (sec && (sec->flags & SEC_ALLOC) != 0
1143 && h != NULL
1144 && (h->root.type == bfd_link_hash_defweak || !h->def_regular));
1145
1146 /* Shared GD. */
1147 if (dynamic && (howto->type == R_OR1K_TLS_GD_HI16
1148 || howto->type == R_OR1K_TLS_GD_LO16))
1149 {
1150 int i;
1151
1152 /* Add DTPMOD and DTPOFF GOT and rela entries. */
1153 for (i = 0; i < 2; ++i)
1154 {
1155 rela.r_offset = sgot->output_section->vma +
1156 sgot->output_offset + gotoff + i*4;
1157 if (h != NULL && h->dynindx != -1)
1158 {
1159 rela.r_info = ELF32_R_INFO (h->dynindx,
1160 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF));
1161 rela.r_addend = 0;
1162 }
1163 else
1164 {
1165 rela.r_info = ELF32_R_INFO (0,
1166 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF));
1167 rela.r_addend = tpoff (info, relocation);
1168 }
1169
1170 loc = sreloc->contents;
1171 loc += sreloc->reloc_count++ *
1172 sizeof (Elf32_External_Rela);
1173
1174 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1175 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff + i*4);
1176 }
1177 }
1178 /* Static GD. */
1179 else if (howto->type == R_OR1K_TLS_GD_HI16
1180 || howto->type == R_OR1K_TLS_GD_LO16)
1181 {
1182 bfd_put_32 (output_bfd, 1, sgot->contents + gotoff);
1183 bfd_put_32 (output_bfd, tpoff (info, relocation),
1184 sgot->contents + gotoff + 4);
1185 }
1186 /* Shared IE. */
1187 else if (dynamic)
1188 {
1189 /* Add TPOFF GOT and rela entries. */
1190 rela.r_offset = sgot->output_section->vma +
1191 sgot->output_offset + gotoff;
1192 if (h != NULL && h->dynindx != -1)
1193 {
1194 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_TLS_TPOFF);
1195 rela.r_addend = 0;
1196 }
1197 else
1198 {
1199 rela.r_info = ELF32_R_INFO (0, R_OR1K_TLS_TPOFF);
1200 rela.r_addend = tpoff (info, relocation);
1201 }
1202
1203 loc = sreloc->contents;
1204 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1205
1206 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1207 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff);
1208 }
1209 /* Static IE. */
1210 else
1211 {
1212 bfd_put_32 (output_bfd, tpoff (info, relocation),
1213 sgot->contents + gotoff);
1214 }
1215 relocation = sgot->output_offset + gotoff;
1216 break;
1217 }
1218 case R_OR1K_TLS_LE_HI16:
1219 case R_OR1K_TLS_LE_LO16:
1220
1221 /* Relocation is offset from TP. */
1222 relocation = tpoff (info, relocation);
1223 break;
1224
1225 case R_OR1K_TLS_DTPMOD:
1226 case R_OR1K_TLS_DTPOFF:
1227 case R_OR1K_TLS_TPOFF:
1228 /* These are resolved dynamically on load and shouldn't
1229 be used as linker input. */
1230 BFD_FAIL ();
1231 (*_bfd_error_handler)
1232 (_("%B: will not resolve runtime TLS relocation"),
1233 input_bfd);
1234 bfd_set_error (bfd_error_bad_value);
1235 return FALSE;
1236
1237 default:
1238 break;
1239 }
1240 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1241 rel->r_offset, relocation, rel->r_addend);
1242
1243 if (r != bfd_reloc_ok)
1244 {
1245 const char *msg = NULL;
1246
1247 switch (r)
1248 {
1249 case bfd_reloc_overflow:
1250 r = info->callbacks->reloc_overflow
1251 (info, (h ? &h->root : NULL), name, howto->name,
1252 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1253 break;
1254
1255 case bfd_reloc_undefined:
1256 r = info->callbacks->undefined_symbol
1257 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1258 break;
1259
1260 case bfd_reloc_outofrange:
1261 msg = _("internal error: out of range error");
1262 break;
1263
1264 case bfd_reloc_notsupported:
1265 msg = _("internal error: unsupported relocation error");
1266 break;
1267
1268 case bfd_reloc_dangerous:
1269 msg = _("internal error: dangerous relocation");
1270 break;
1271
1272 default:
1273 msg = _("internal error: unknown error");
1274 break;
1275 }
1276
1277 if (msg)
1278 r = info->callbacks->warning
1279 (info, msg, name, input_bfd, input_section, rel->r_offset);
1280
1281 if (!r)
1282 return FALSE;
1283 }
1284 }
1285
1286 return TRUE;
1287 }
1288
1289 /* Return the section that should be marked against GC for a given
1290 relocation. */
1291
1292 static asection *
1293 or1k_elf_gc_mark_hook (asection *sec,
1294 struct bfd_link_info *info,
1295 Elf_Internal_Rela *rel,
1296 struct elf_link_hash_entry *h,
1297 Elf_Internal_Sym *sym)
1298 {
1299 if (h != NULL)
1300 switch (ELF32_R_TYPE (rel->r_info))
1301 {
1302 case R_OR1K_GNU_VTINHERIT:
1303 case R_OR1K_GNU_VTENTRY:
1304 return NULL;
1305 }
1306
1307 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1308 }
1309
1310 static bfd_boolean
1311 or1k_elf_gc_sweep_hook (bfd *abfd,
1312 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1313 asection *sec,
1314 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
1315 {
1316 /* Update the got entry reference counts for the section being removed. */
1317 Elf_Internal_Shdr *symtab_hdr;
1318 struct elf_link_hash_entry **sym_hashes;
1319 bfd_signed_vma *local_got_refcounts;
1320 const Elf_Internal_Rela *rel, *relend;
1321
1322 elf_section_data (sec)->local_dynrel = NULL;
1323
1324 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1325 sym_hashes = elf_sym_hashes (abfd);
1326 local_got_refcounts = elf_local_got_refcounts (abfd);
1327
1328 relend = relocs + sec->reloc_count;
1329 for (rel = relocs; rel < relend; rel++)
1330 {
1331 unsigned long r_symndx;
1332 struct elf_link_hash_entry *h = NULL;
1333
1334 r_symndx = ELF32_R_SYM (rel->r_info);
1335 if (r_symndx >= symtab_hdr->sh_info)
1336 {
1337 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1338 while (h->root.type == bfd_link_hash_indirect
1339 || h->root.type == bfd_link_hash_warning)
1340 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1341 }
1342
1343 switch (ELF32_R_TYPE (rel->r_info))
1344 {
1345 case R_OR1K_GOT16:
1346 if (h != NULL)
1347 {
1348 if (h->got.refcount > 0)
1349 h->got.refcount--;
1350 }
1351 else
1352 {
1353 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0)
1354 local_got_refcounts[r_symndx]--;
1355 }
1356 break;
1357
1358 default:
1359 break;
1360 }
1361 }
1362 return TRUE;
1363 }
1364
1365 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
1366 shortcuts to them in our hash table. */
1367
1368 static bfd_boolean
1369 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1370 {
1371 struct elf_or1k_link_hash_table *htab;
1372 asection *s;
1373
1374 /* This function may be called more than once. */
1375 s = bfd_get_section_by_name (dynobj, ".got");
1376 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
1377 return TRUE;
1378
1379 htab = or1k_elf_hash_table (info);
1380 if (htab == NULL)
1381 return FALSE;
1382
1383 if (! _bfd_elf_create_got_section (dynobj, info))
1384 return FALSE;
1385
1386 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1387 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1388 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1389
1390 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot)
1391 abort ();
1392
1393 if (! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
1394 | SEC_LOAD
1395 | SEC_HAS_CONTENTS
1396 | SEC_IN_MEMORY
1397 | SEC_LINKER_CREATED
1398 | SEC_READONLY)
1399 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1400 return FALSE;
1401
1402 return TRUE;
1403 }
1404
1405 /* Look through the relocs for a section during the first phase. */
1406
1407 static bfd_boolean
1408 or1k_elf_check_relocs (bfd *abfd,
1409 struct bfd_link_info *info,
1410 asection *sec,
1411 const Elf_Internal_Rela *relocs)
1412 {
1413 Elf_Internal_Shdr *symtab_hdr;
1414 struct elf_link_hash_entry **sym_hashes;
1415 const Elf_Internal_Rela *rel;
1416
1417 const Elf_Internal_Rela *rel_end;
1418 struct elf_or1k_link_hash_table *htab;
1419 bfd *dynobj;
1420 asection *sreloc = NULL;
1421
1422 if (info->relocatable)
1423 return TRUE;
1424
1425 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1426 sym_hashes = elf_sym_hashes (abfd);
1427
1428 htab = or1k_elf_hash_table (info);
1429 if (htab == NULL)
1430 return FALSE;
1431
1432 dynobj = htab->root.dynobj;
1433
1434 rel_end = relocs + sec->reloc_count;
1435 for (rel = relocs; rel < rel_end; rel++)
1436 {
1437 struct elf_link_hash_entry *h;
1438 unsigned long r_symndx;
1439 unsigned char tls_type;
1440
1441 r_symndx = ELF32_R_SYM (rel->r_info);
1442 if (r_symndx < symtab_hdr->sh_info)
1443 h = NULL;
1444 else
1445 {
1446 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1447 while (h->root.type == bfd_link_hash_indirect
1448 || h->root.type == bfd_link_hash_warning)
1449 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1450
1451 /* PR15323, ref flags aren't set for references in the same
1452 object. */
1453 h->root.non_ir_ref = 1;
1454 }
1455
1456 switch (ELF32_R_TYPE (rel->r_info))
1457 {
1458 case R_OR1K_TLS_GD_HI16:
1459 case R_OR1K_TLS_GD_LO16:
1460 tls_type = TLS_GD;
1461 break;
1462 case R_OR1K_TLS_LDM_HI16:
1463 case R_OR1K_TLS_LDM_LO16:
1464 case R_OR1K_TLS_LDO_HI16:
1465 case R_OR1K_TLS_LDO_LO16:
1466 tls_type = TLS_LD;
1467 break;
1468 case R_OR1K_TLS_IE_HI16:
1469 case R_OR1K_TLS_IE_LO16:
1470 tls_type = TLS_IE;
1471 break;
1472 case R_OR1K_TLS_LE_HI16:
1473 case R_OR1K_TLS_LE_LO16:
1474 tls_type = TLS_LE;
1475 break;
1476 default:
1477 tls_type = TLS_NONE;
1478 }
1479
1480 /* Record TLS type. */
1481 if (h != NULL)
1482 ((struct elf_or1k_link_hash_entry *) h)->tls_type = tls_type;
1483 else
1484 {
1485 unsigned char *local_tls_type;
1486
1487 /* This is a TLS type record for a local symbol. */
1488 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (abfd);
1489 if (local_tls_type == NULL)
1490 {
1491 bfd_size_type size;
1492
1493 size = symtab_hdr->sh_info;
1494 local_tls_type = bfd_zalloc (abfd, size);
1495 if (local_tls_type == NULL)
1496 return FALSE;
1497 elf_or1k_local_tls_type (abfd) = local_tls_type;
1498 }
1499 local_tls_type[r_symndx] = tls_type;
1500 }
1501
1502 switch (ELF32_R_TYPE (rel->r_info))
1503 {
1504 /* This relocation describes the C++ object vtable hierarchy.
1505 Reconstruct it for later use during GC. */
1506 case R_OR1K_GNU_VTINHERIT:
1507 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1508 return FALSE;
1509 break;
1510
1511 /* This relocation describes which C++ vtable entries are actually
1512 used. Record for later use during GC. */
1513 case R_OR1K_GNU_VTENTRY:
1514 BFD_ASSERT (h != NULL);
1515 if (h != NULL
1516 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1517 return FALSE;
1518 break;
1519
1520 /* This relocation requires .plt entry. */
1521 case R_OR1K_PLT26:
1522 if (h != NULL)
1523 {
1524 h->needs_plt = 1;
1525 h->plt.refcount += 1;
1526 }
1527 break;
1528
1529 case R_OR1K_GOT16:
1530 case R_OR1K_GOTOFF_HI16:
1531 case R_OR1K_GOTOFF_LO16:
1532 case R_OR1K_TLS_GD_HI16:
1533 case R_OR1K_TLS_GD_LO16:
1534 case R_OR1K_TLS_IE_HI16:
1535 case R_OR1K_TLS_IE_LO16:
1536 if (htab->sgot == NULL)
1537 {
1538 if (dynobj == NULL)
1539 htab->root.dynobj = dynobj = abfd;
1540 if (! create_got_section (dynobj, info))
1541 return FALSE;
1542 }
1543
1544 /* TLS specific. */
1545 if (ELF32_R_TYPE (rel->r_info) >= R_OR1K_TLS_GD_HI16 &&
1546 ELF32_R_TYPE (rel->r_info) <= R_OR1K_TLS_IE_LO16)
1547 {
1548 /* Set which rela section to use. */
1549 elf_section_data (sec)->sreloc =
1550 bfd_get_section_by_name (dynobj, ".rela.got");;
1551 }
1552
1553 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_HI16 &&
1554 ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_LO16)
1555 {
1556 if (h != NULL)
1557 h->got.refcount += 1;
1558 else
1559 {
1560 bfd_signed_vma *local_got_refcounts;
1561
1562 /* This is a global offset table entry for a local symbol. */
1563 local_got_refcounts = elf_local_got_refcounts (abfd);
1564 if (local_got_refcounts == NULL)
1565 {
1566 bfd_size_type size;
1567
1568 size = symtab_hdr->sh_info;
1569 size *= sizeof (bfd_signed_vma);
1570 local_got_refcounts = bfd_zalloc (abfd, size);
1571 if (local_got_refcounts == NULL)
1572 return FALSE;
1573 elf_local_got_refcounts (abfd) = local_got_refcounts;
1574 }
1575 local_got_refcounts[r_symndx] += 1;
1576 }
1577 }
1578 break;
1579
1580 case R_OR1K_INSN_REL_26:
1581 case R_OR1K_HI_16_IN_INSN:
1582 case R_OR1K_LO_16_IN_INSN:
1583 case R_OR1K_32:
1584 /* R_OR1K_16? */
1585 {
1586 if (h != NULL && !info->shared)
1587 {
1588 /* We may need a copy reloc. */
1589 h->non_got_ref = 1;
1590
1591 /* We may also need a .plt entry. */
1592 h->plt.refcount += 1;
1593 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26)
1594 h->pointer_equality_needed = 1;
1595 }
1596
1597 /* If we are creating a shared library, and this is a reloc
1598 against a global symbol, or a non PC relative reloc
1599 against a local symbol, then we need to copy the reloc
1600 into the shared library. However, if we are linking with
1601 -Bsymbolic, we do not need to copy a reloc against a
1602 global symbol which is defined in an object we are
1603 including in the link (i.e., DEF_REGULAR is set). At
1604 this point we have not seen all the input files, so it is
1605 possible that DEF_REGULAR is not set now but will be set
1606 later (it is never cleared). In case of a weak definition,
1607 DEF_REGULAR may be cleared later by a strong definition in
1608 a shared library. We account for that possibility below by
1609 storing information in the relocs_copied field of the hash
1610 table entry. A similar situation occurs when creating
1611 shared libraries and symbol visibility changes render the
1612 symbol local.
1613
1614 If on the other hand, we are creating an executable, we
1615 may need to keep relocations for symbols satisfied by a
1616 dynamic library if we manage to avoid copy relocs for the
1617 symbol. */
1618
1619 if ((info->shared
1620 && (sec->flags & SEC_ALLOC) != 0
1621 && (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26
1622 || (h != NULL
1623 && (! info->symbolic
1624 || h->root.type == bfd_link_hash_defweak
1625 || !h->def_regular))))
1626 || (!info->shared
1627 && (sec->flags & SEC_ALLOC) != 0
1628 && h != NULL
1629 && (h->root.type == bfd_link_hash_defweak
1630 || !h->def_regular)))
1631 {
1632 struct elf_or1k_dyn_relocs *p;
1633 struct elf_or1k_dyn_relocs **head;
1634
1635 /* When creating a shared object, we must copy these
1636 relocs into the output file. We create a reloc
1637 section in dynobj and make room for the reloc. */
1638 if (sreloc == NULL)
1639 {
1640 const char *name;
1641 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1642 unsigned int shnam = _bfd_elf_single_rel_hdr (sec)->sh_name;
1643
1644 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1645 if (name == NULL)
1646 return FALSE;
1647
1648 if (strncmp (name, ".rela", 5) != 0
1649 || strcmp (bfd_get_section_name (abfd, sec),
1650 name + 5) != 0)
1651 {
1652 (*_bfd_error_handler)
1653 (_("%B: bad relocation section name `%s\'"),
1654 abfd, name);
1655 }
1656
1657 if (htab->root.dynobj == NULL)
1658 htab->root.dynobj = abfd;
1659 dynobj = htab->root.dynobj;
1660
1661 sreloc = bfd_get_section_by_name (dynobj, name);
1662 if (sreloc == NULL)
1663 {
1664 sreloc = _bfd_elf_make_dynamic_reloc_section
1665 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
1666
1667 if (sreloc == NULL)
1668 return FALSE;
1669 }
1670 elf_section_data (sec)->sreloc = sreloc;
1671 }
1672
1673 /* If this is a global symbol, we count the number of
1674 relocations we need for this symbol. */
1675 if (h != NULL)
1676 head = &((struct elf_or1k_link_hash_entry *) h)->dyn_relocs;
1677 else
1678 {
1679 /* Track dynamic relocs needed for local syms too.
1680 We really need local syms available to do this
1681 easily. Oh well. */
1682
1683 asection *s;
1684 Elf_Internal_Sym *isym;
1685 void *vpp;
1686
1687 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
1688 abfd, r_symndx);
1689 if (isym == NULL)
1690 return FALSE;
1691
1692 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1693 if (s == NULL)
1694 return FALSE;
1695
1696 vpp = &elf_section_data (s)->local_dynrel;
1697 head = (struct elf_or1k_dyn_relocs **) vpp;
1698 }
1699
1700 p = *head;
1701 if (p == NULL || p->sec != sec)
1702 {
1703 bfd_size_type amt = sizeof *p;
1704 p = ((struct elf_or1k_dyn_relocs *)
1705 bfd_alloc (htab->root.dynobj, amt));
1706 if (p == NULL)
1707 return FALSE;
1708 p->next = *head;
1709 *head = p;
1710 p->sec = sec;
1711 p->count = 0;
1712 p->pc_count = 0;
1713 }
1714
1715 p->count += 1;
1716 if (ELF32_R_TYPE (rel->r_info) == R_OR1K_INSN_REL_26)
1717 p->pc_count += 1;
1718 }
1719 }
1720 break;
1721 }
1722 }
1723
1724 return TRUE;
1725 }
1726
1727 /* Finish up the dynamic sections. */
1728
1729 static bfd_boolean
1730 or1k_elf_finish_dynamic_sections (bfd *output_bfd,
1731 struct bfd_link_info *info)
1732 {
1733 bfd *dynobj;
1734 asection *sdyn, *sgot;
1735 struct elf_or1k_link_hash_table *htab;
1736
1737 htab = or1k_elf_hash_table (info);
1738 if (htab == NULL)
1739 return FALSE;
1740
1741 dynobj = htab->root.dynobj;
1742
1743 sgot = htab->sgotplt;
1744 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1745
1746 if (htab->root.dynamic_sections_created)
1747 {
1748 asection *splt;
1749 Elf32_External_Dyn *dyncon, *dynconend;
1750
1751 BFD_ASSERT (sgot != NULL && sdyn != NULL);
1752
1753 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1754 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1755
1756 for (; dyncon < dynconend; dyncon++)
1757 {
1758 Elf_Internal_Dyn dyn;
1759 asection *s;
1760
1761 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1762
1763 switch (dyn.d_tag)
1764 {
1765 default:
1766 continue;
1767
1768 case DT_PLTGOT:
1769 s = htab->sgot->output_section;
1770 BFD_ASSERT (s != NULL);
1771 dyn.d_un.d_ptr = s->vma;
1772 break;
1773
1774 case DT_JMPREL:
1775 s = htab->srelplt->output_section;
1776 BFD_ASSERT (s != NULL);
1777 dyn.d_un.d_ptr = s->vma;
1778 break;
1779
1780 case DT_PLTRELSZ:
1781 s = htab->srelplt->output_section;
1782 BFD_ASSERT (s != NULL);
1783 dyn.d_un.d_val = s->size;
1784 break;
1785
1786 case DT_RELASZ:
1787 /* My reading of the SVR4 ABI indicates that the
1788 procedure linkage table relocs (DT_JMPREL) should be
1789 included in the overall relocs (DT_RELA). This is
1790 what Solaris does. However, UnixWare can not handle
1791 that case. Therefore, we override the DT_RELASZ entry
1792 here to make it not include the JMPREL relocs. Since
1793 the linker script arranges for .rela.plt to follow all
1794 other relocation sections, we don't have to worry
1795 about changing the DT_RELA entry. */
1796 if (htab->srelplt != NULL)
1797 {
1798 /* FIXME: this calculation sometimes produces
1799 wrong result, the problem is that the dyn.d_un.d_val
1800 is not always correct, needs investigation why
1801 that happens. In the meantime, reading the
1802 ".rela.dyn" section by name seems to yield
1803 correct result.
1804
1805 s = htab->srelplt->output_section;
1806 dyn.d_un.d_val -= s->size;
1807 */
1808
1809 s = bfd_get_section_by_name (output_bfd, ".rela.dyn");
1810 dyn.d_un.d_val = s ? s->size : 0;
1811 }
1812 break;
1813 }
1814 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1815 }
1816
1817
1818 /* Fill in the first entry in the procedure linkage table. */
1819 splt = htab->splt;
1820 if (splt && splt->size > 0)
1821 {
1822 if (info->shared)
1823 {
1824 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0,
1825 splt->contents);
1826 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1,
1827 splt->contents + 4);
1828 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2,
1829 splt->contents + 8);
1830 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3,
1831 splt->contents + 12);
1832 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4,
1833 splt->contents + 16);
1834 }
1835 else
1836 {
1837 unsigned long addr;
1838 /* addr = .got + 4 */
1839 addr = sgot->output_section->vma + sgot->output_offset + 4;
1840 bfd_put_32 (output_bfd,
1841 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
1842 splt->contents);
1843 bfd_put_32 (output_bfd,
1844 PLT0_ENTRY_WORD1 | (addr & 0xffff),
1845 splt->contents + 4);
1846 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
1847 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
1848 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
1849 }
1850
1851 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
1852 }
1853 }
1854
1855 /* Set the first entry in the global offset table to the address of
1856 the dynamic section. */
1857 if (sgot && sgot->size > 0)
1858 {
1859 if (sdyn == NULL)
1860 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1861 else
1862 bfd_put_32 (output_bfd,
1863 sdyn->output_section->vma + sdyn->output_offset,
1864 sgot->contents);
1865 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1866 }
1867
1868 if (htab->sgot && htab->sgot->size > 0)
1869 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
1870
1871 return TRUE;
1872 }
1873
1874 /* Finish up dynamic symbol handling. We set the contents of various
1875 dynamic sections here. */
1876
1877 static bfd_boolean
1878 or1k_elf_finish_dynamic_symbol (bfd *output_bfd,
1879 struct bfd_link_info *info,
1880 struct elf_link_hash_entry *h,
1881 Elf_Internal_Sym *sym)
1882 {
1883 struct elf_or1k_link_hash_table *htab;
1884 bfd_byte *loc;
1885
1886 htab = or1k_elf_hash_table (info);
1887 if (htab == NULL)
1888 return FALSE;
1889
1890 if (h->plt.offset != (bfd_vma) -1)
1891 {
1892 asection *splt;
1893 asection *sgot;
1894 asection *srela;
1895
1896 bfd_vma plt_index;
1897 bfd_vma got_offset;
1898 bfd_vma got_addr;
1899 Elf_Internal_Rela rela;
1900
1901 /* This symbol has an entry in the procedure linkage table. Set
1902 it up. */
1903 BFD_ASSERT (h->dynindx != -1);
1904
1905 splt = htab->splt;
1906 sgot = htab->sgotplt;
1907 srela = htab->srelplt;
1908 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1909
1910 /* Get the index in the procedure linkage table which
1911 corresponds to this symbol. This is the index of this symbol
1912 in all the symbols for which we are making plt entries. The
1913 first entry in the procedure linkage table is reserved. */
1914 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1915
1916 /* Get the offset into the .got table of the entry that
1917 corresponds to this function. Each .got entry is 4 bytes.
1918 The first three are reserved. */
1919 got_offset = (plt_index + 3) * 4;
1920 got_addr = got_offset;
1921
1922 /* Fill in the entry in the procedure linkage table. */
1923 if (! info->shared)
1924 {
1925 got_addr += htab->sgotplt->output_section->vma
1926 + htab->sgotplt->output_offset;
1927 bfd_put_32 (output_bfd, PLT_ENTRY_WORD0 | ((got_addr >> 16) & 0xffff),
1928 splt->contents + h->plt.offset);
1929 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1 | (got_addr & 0xffff),
1930 splt->contents + h->plt.offset + 4);
1931 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
1932 splt->contents + h->plt.offset + 8);
1933 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
1934 splt->contents + h->plt.offset + 12);
1935 bfd_put_32 (output_bfd, PLT_ENTRY_WORD4
1936 | plt_index * sizeof (Elf32_External_Rela),
1937 splt->contents + h->plt.offset + 16);
1938 }
1939 else
1940 {
1941 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0 | (got_addr & 0xffff),
1942 splt->contents + h->plt.offset);
1943 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1
1944 | plt_index * sizeof (Elf32_External_Rela),
1945 splt->contents + h->plt.offset + 4);
1946 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
1947 splt->contents + h->plt.offset + 8);
1948 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
1949 splt->contents + h->plt.offset + 12);
1950 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
1951 splt->contents + h->plt.offset + 16);
1952 }
1953
1954 /* Fill in the entry in the global offset table. */
1955 bfd_put_32 (output_bfd,
1956 (splt->output_section->vma
1957 + splt->output_offset), /* Same offset. */
1958 sgot->contents + got_offset);
1959
1960 /* Fill in the entry in the .rela.plt section. */
1961 rela.r_offset = (sgot->output_section->vma
1962 + sgot->output_offset
1963 + got_offset);
1964 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_JMP_SLOT);
1965 rela.r_addend = 0;
1966 loc = srela->contents;
1967 loc += plt_index * sizeof (Elf32_External_Rela);
1968 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1969
1970 if (!h->def_regular)
1971 {
1972 /* Mark the symbol as undefined, rather than as defined in
1973 the .plt section. Leave the value alone. */
1974 sym->st_shndx = SHN_UNDEF;
1975 }
1976
1977 }
1978
1979 if (h->got.offset != (bfd_vma) -1
1980 && (h->got.offset & 2) == 0) /* Homemade TLS check. */
1981 {
1982 asection *sgot;
1983 asection *srela;
1984 Elf_Internal_Rela rela;
1985
1986 /* This symbol has an entry in the global offset table. Set it
1987 up. */
1988 sgot = htab->sgot;
1989 srela = htab->srelgot;
1990 BFD_ASSERT (sgot != NULL && srela != NULL);
1991
1992 rela.r_offset = (sgot->output_section->vma
1993 + sgot->output_offset
1994 + (h->got.offset &~ 1));
1995
1996 /* If this is a -Bsymbolic link, and the symbol is defined
1997 locally, we just want to emit a RELATIVE reloc. Likewise if
1998 the symbol was forced to be local because of a version file.
1999 The entry in the global offset table will already have been
2000 initialized in the relocate_section function. */
2001 if (info->shared
2002 && (info->symbolic
2003 || h->dynindx == -1
2004 || h->forced_local)
2005 && h->def_regular)
2006 {
2007 rela.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
2008 rela.r_addend = (h->root.u.def.value
2009 + h->root.u.def.section->output_section->vma
2010 + h->root.u.def.section->output_offset);
2011 }
2012 else
2013 {
2014 BFD_ASSERT ((h->got.offset & 1) == 0);
2015 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2016 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_GLOB_DAT);
2017 rela.r_addend = 0;
2018 }
2019
2020 loc = srela->contents;
2021 loc += srela->reloc_count * sizeof (Elf32_External_Rela);
2022 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2023 ++srela->reloc_count;
2024 }
2025
2026 if (h->needs_copy)
2027 {
2028 asection *s;
2029 Elf_Internal_Rela rela;
2030
2031 /* This symbols needs a copy reloc. Set it up. */
2032 BFD_ASSERT (h->dynindx != -1
2033 && (h->root.type == bfd_link_hash_defined
2034 || h->root.type == bfd_link_hash_defweak));
2035
2036 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2037 ".rela.bss");
2038 BFD_ASSERT (s != NULL);
2039
2040 rela.r_offset = (h->root.u.def.value
2041 + h->root.u.def.section->output_section->vma
2042 + h->root.u.def.section->output_offset);
2043 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_COPY);
2044 rela.r_addend = 0;
2045 loc = s->contents;
2046 loc += s->reloc_count * sizeof (Elf32_External_Rela);
2047 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2048 ++s->reloc_count;
2049 }
2050
2051 /* Mark some specially defined symbols as absolute. */
2052 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2053 || h == htab->root.hgot)
2054 sym->st_shndx = SHN_ABS;
2055
2056 return TRUE;
2057 }
2058
2059 static enum elf_reloc_type_class
2060 or1k_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2061 const asection *rel_sec ATTRIBUTE_UNUSED,
2062 const Elf_Internal_Rela *rela)
2063 {
2064 switch ((int) ELF32_R_TYPE (rela->r_info))
2065 {
2066 case R_OR1K_RELATIVE: return reloc_class_relative;
2067 case R_OR1K_JMP_SLOT: return reloc_class_plt;
2068 case R_OR1K_COPY: return reloc_class_copy;
2069 default: return reloc_class_normal;
2070 }
2071 }
2072
2073 /* Adjust a symbol defined by a dynamic object and referenced by a
2074 regular object. The current definition is in some section of the
2075 dynamic object, but we're not including those sections. We have to
2076 change the definition to something the rest of the link can
2077 understand. */
2078
2079 static bfd_boolean
2080 or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2081 struct elf_link_hash_entry *h)
2082 {
2083 struct elf_or1k_link_hash_table *htab;
2084 struct elf_or1k_link_hash_entry *eh;
2085 struct elf_or1k_dyn_relocs *p;
2086 bfd *dynobj;
2087 asection *s;
2088
2089 dynobj = elf_hash_table (info)->dynobj;
2090
2091 /* Make sure we know what is going on here. */
2092 BFD_ASSERT (dynobj != NULL
2093 && (h->needs_plt
2094 || h->u.weakdef != NULL
2095 || (h->def_dynamic
2096 && h->ref_regular
2097 && !h->def_regular)));
2098
2099 /* If this is a function, put it in the procedure linkage table. We
2100 will fill in the contents of the procedure linkage table later,
2101 when we know the address of the .got section. */
2102 if (h->type == STT_FUNC
2103 || h->needs_plt)
2104 {
2105 if (! info->shared
2106 && !h->def_dynamic
2107 && !h->ref_dynamic
2108 && h->root.type != bfd_link_hash_undefweak
2109 && h->root.type != bfd_link_hash_undefined)
2110 {
2111 /* This case can occur if we saw a PLT reloc in an input
2112 file, but the symbol was never referred to by a dynamic
2113 object. In such a case, we don't actually need to build
2114 a procedure linkage table, and we can just do a PCREL
2115 reloc instead. */
2116 h->plt.offset = (bfd_vma) -1;
2117 h->needs_plt = 0;
2118 }
2119
2120 return TRUE;
2121 }
2122 else
2123 h->plt.offset = (bfd_vma) -1;
2124
2125 /* If this is a weak symbol, and there is a real definition, the
2126 processor independent code will have arranged for us to see the
2127 real definition first, and we can just use the same value. */
2128 if (h->u.weakdef != NULL)
2129 {
2130 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2131 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2132 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2133 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2134 return TRUE;
2135 }
2136
2137 /* This is a reference to a symbol defined by a dynamic object which
2138 is not a function. */
2139
2140 /* If we are creating a shared library, we must presume that the
2141 only references to the symbol are via the global offset table.
2142 For such cases we need not do anything here; the relocations will
2143 be handled correctly by relocate_section. */
2144 if (info->shared)
2145 return TRUE;
2146
2147 /* If there are no references to this symbol that do not use the
2148 GOT, we don't need to generate a copy reloc. */
2149 if (!h->non_got_ref)
2150 return TRUE;
2151
2152 /* If -z nocopyreloc was given, we won't generate them either. */
2153 if (info->nocopyreloc)
2154 {
2155 h->non_got_ref = 0;
2156 return TRUE;
2157 }
2158
2159 eh = (struct elf_or1k_link_hash_entry *) h;
2160 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2161 {
2162 s = p->sec->output_section;
2163 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
2164 break;
2165 }
2166
2167 /* If we didn't find any dynamic relocs in sections which needs the
2168 copy reloc, then we'll be keeping the dynamic relocs and avoiding
2169 the copy reloc. */
2170 if (p == NULL)
2171 {
2172 h->non_got_ref = 0;
2173 return TRUE;
2174 }
2175
2176 /* We must allocate the symbol in our .dynbss section, which will
2177 become part of the .bss section of the executable. There will be
2178 an entry for this symbol in the .dynsym section. The dynamic
2179 object will contain position independent code, so all references
2180 from the dynamic object to this symbol will go through the global
2181 offset table. The dynamic linker will use the .dynsym entry to
2182 determine the address it must put in the global offset table, so
2183 both the dynamic object and the regular object will refer to the
2184 same memory location for the variable. */
2185
2186 htab = or1k_elf_hash_table (info);
2187 if (htab == NULL)
2188 return FALSE;
2189
2190 s = htab->sdynbss;
2191 BFD_ASSERT (s != NULL);
2192
2193 /* We must generate a R_OR1K_COPY reloc to tell the dynamic linker
2194 to copy the initial value out of the dynamic object and into the
2195 runtime process image. We need to remember the offset into the
2196 .rela.bss section we are going to use. */
2197 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2198 {
2199 asection *srel;
2200
2201 srel = htab->srelbss;
2202 BFD_ASSERT (srel != NULL);
2203 srel->size += sizeof (Elf32_External_Rela);
2204 h->needs_copy = 1;
2205 }
2206
2207 return _bfd_elf_adjust_dynamic_copy (h, s);
2208 }
2209
2210 /* Allocate space in .plt, .got and associated reloc sections for
2211 dynamic relocs. */
2212
2213 static bfd_boolean
2214 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2215 {
2216 struct bfd_link_info *info;
2217 struct elf_or1k_link_hash_table *htab;
2218 struct elf_or1k_link_hash_entry *eh;
2219 struct elf_or1k_dyn_relocs *p;
2220
2221 if (h->root.type == bfd_link_hash_indirect)
2222 return TRUE;
2223
2224 info = (struct bfd_link_info *) inf;
2225 htab = or1k_elf_hash_table (info);
2226 if (htab == NULL)
2227 return FALSE;
2228
2229 eh = (struct elf_or1k_link_hash_entry *) h;
2230
2231 if (htab->root.dynamic_sections_created
2232 && h->plt.refcount > 0)
2233 {
2234 /* Make sure this symbol is output as a dynamic symbol.
2235 Undefined weak syms won't yet be marked as dynamic. */
2236 if (h->dynindx == -1
2237 && !h->forced_local)
2238 {
2239 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2240 return FALSE;
2241 }
2242
2243 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
2244 {
2245 asection *s = htab->splt;
2246
2247 /* If this is the first .plt entry, make room for the special
2248 first entry. */
2249 if (s->size == 0)
2250 s->size = PLT_ENTRY_SIZE;
2251
2252 h->plt.offset = s->size;
2253
2254 /* If this symbol is not defined in a regular file, and we are
2255 not generating a shared library, then set the symbol to this
2256 location in the .plt. This is required to make function
2257 pointers compare as equal between the normal executable and
2258 the shared library. */
2259 if (! info->shared
2260 && !h->def_regular)
2261 {
2262 h->root.u.def.section = s;
2263 h->root.u.def.value = h->plt.offset;
2264 }
2265
2266 /* Make room for this entry. */
2267 s->size += PLT_ENTRY_SIZE;
2268
2269 /* We also need to make an entry in the .got.plt section, which
2270 will be placed in the .got section by the linker script. */
2271 htab->sgotplt->size += 4;
2272
2273 /* We also need to make an entry in the .rel.plt section. */
2274 htab->srelplt->size += sizeof (Elf32_External_Rela);
2275 }
2276 else
2277 {
2278 h->plt.offset = (bfd_vma) -1;
2279 h->needs_plt = 0;
2280 }
2281 }
2282 else
2283 {
2284 h->plt.offset = (bfd_vma) -1;
2285 h->needs_plt = 0;
2286 }
2287
2288 if (h->got.refcount > 0)
2289 {
2290 asection *s;
2291 bfd_boolean dyn;
2292 unsigned char tls_type;
2293
2294 /* Make sure this symbol is output as a dynamic symbol.
2295 Undefined weak syms won't yet be marked as dynamic. */
2296 if (h->dynindx == -1
2297 && !h->forced_local)
2298 {
2299 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2300 return FALSE;
2301 }
2302
2303 s = htab->sgot;
2304
2305 h->got.offset = s->size;
2306
2307 tls_type = ((struct elf_or1k_link_hash_entry *) h)->tls_type;
2308
2309 /* TLS GD requires two GOT and two relocs. */
2310 if (tls_type == TLS_GD)
2311 s->size += 8;
2312 else
2313 s->size += 4;
2314 dyn = htab->root.dynamic_sections_created;
2315 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h))
2316 {
2317 if (tls_type == TLS_GD)
2318 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2319 else
2320 htab->srelgot->size += sizeof (Elf32_External_Rela);
2321 }
2322 }
2323 else
2324 h->got.offset = (bfd_vma) -1;
2325
2326 if (eh->dyn_relocs == NULL)
2327 return TRUE;
2328
2329 /* In the shared -Bsymbolic case, discard space allocated for
2330 dynamic pc-relative relocs against symbols which turn out to be
2331 defined in regular objects. For the normal shared case, discard
2332 space for pc-relative relocs that have become local due to symbol
2333 visibility changes. */
2334
2335 if (info->shared)
2336 {
2337 if (h->def_regular
2338 && (h->forced_local
2339 || info->symbolic))
2340 {
2341 struct elf_or1k_dyn_relocs **pp;
2342
2343 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
2344 {
2345 p->count -= p->pc_count;
2346 p->pc_count = 0;
2347 if (p->count == 0)
2348 *pp = p->next;
2349 else
2350 pp = &p->next;
2351 }
2352 }
2353
2354 /* Also discard relocs on undefined weak syms with non-default
2355 visibility. */
2356 if (eh->dyn_relocs != NULL
2357 && h->root.type == bfd_link_hash_undefweak)
2358 {
2359 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2360 eh->dyn_relocs = NULL;
2361
2362 /* Make sure undefined weak symbols are output as a dynamic
2363 symbol in PIEs. */
2364 else if (h->dynindx == -1
2365 && !h->forced_local)
2366 {
2367 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2368 return FALSE;
2369 }
2370 }
2371 }
2372 else
2373 {
2374 /* For the non-shared case, discard space for relocs against
2375 symbols which turn out to need copy relocs or are not
2376 dynamic. */
2377
2378 if (!h->non_got_ref
2379 && ((h->def_dynamic
2380 && !h->def_regular)
2381 || (htab->root.dynamic_sections_created
2382 && (h->root.type == bfd_link_hash_undefweak
2383 || h->root.type == bfd_link_hash_undefined))))
2384 {
2385 /* Make sure this symbol is output as a dynamic symbol.
2386 Undefined weak syms won't yet be marked as dynamic. */
2387 if (h->dynindx == -1
2388 && !h->forced_local)
2389 {
2390 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2391 return FALSE;
2392 }
2393
2394 /* If that succeeded, we know we'll be keeping all the
2395 relocs. */
2396 if (h->dynindx != -1)
2397 goto keep;
2398 }
2399
2400 eh->dyn_relocs = NULL;
2401
2402 keep: ;
2403 }
2404
2405 /* Finally, allocate space. */
2406 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2407 {
2408 asection *sreloc = elf_section_data (p->sec)->sreloc;
2409 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2410 }
2411
2412 return TRUE;
2413 }
2414
2415 /* Find any dynamic relocs that apply to read-only sections. */
2416
2417 static bfd_boolean
2418 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2419 {
2420 struct elf_or1k_link_hash_entry *eh;
2421 struct elf_or1k_dyn_relocs *p;
2422
2423 eh = (struct elf_or1k_link_hash_entry *) h;
2424 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2425 {
2426 asection *s = p->sec->output_section;
2427
2428 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2429 {
2430 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2431
2432 info->flags |= DF_TEXTREL;
2433
2434 /* Not an error, just cut short the traversal. */
2435 return FALSE;
2436 }
2437 }
2438 return TRUE;
2439 }
2440
2441 /* Set the sizes of the dynamic sections. */
2442
2443 static bfd_boolean
2444 or1k_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2445 struct bfd_link_info *info)
2446 {
2447 struct elf_or1k_link_hash_table *htab;
2448 bfd *dynobj;
2449 asection *s;
2450 bfd_boolean relocs;
2451 bfd *ibfd;
2452
2453 htab = or1k_elf_hash_table (info);
2454 if (htab == NULL)
2455 return FALSE;
2456
2457 dynobj = htab->root.dynobj;
2458 BFD_ASSERT (dynobj != NULL);
2459
2460 if (htab->root.dynamic_sections_created)
2461 {
2462 /* Set the contents of the .interp section to the interpreter. */
2463 if (info->executable)
2464 {
2465 s = bfd_get_section_by_name (dynobj, ".interp");
2466 BFD_ASSERT (s != NULL);
2467 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2468 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2469 }
2470 }
2471
2472 /* Set up .got offsets for local syms, and space for local dynamic
2473 relocs. */
2474 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2475 {
2476 bfd_signed_vma *local_got;
2477 bfd_signed_vma *end_local_got;
2478 bfd_size_type locsymcount;
2479 Elf_Internal_Shdr *symtab_hdr;
2480 unsigned char *local_tls_type;
2481 asection *srel;
2482
2483 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2484 continue;
2485
2486 for (s = ibfd->sections; s != NULL; s = s->next)
2487 {
2488 struct elf_or1k_dyn_relocs *p;
2489
2490 for (p = ((struct elf_or1k_dyn_relocs *)
2491 elf_section_data (s)->local_dynrel);
2492 p != NULL;
2493 p = p->next)
2494 {
2495 if (! bfd_is_abs_section (p->sec)
2496 && bfd_is_abs_section (p->sec->output_section))
2497 {
2498 /* Input section has been discarded, either because
2499 it is a copy of a linkonce section or due to
2500 linker script /DISCARD/, so we'll be discarding
2501 the relocs too. */
2502 }
2503 else if (p->count != 0)
2504 {
2505 srel = elf_section_data (p->sec)->sreloc;
2506 srel->size += p->count * sizeof (Elf32_External_Rela);
2507 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2508 info->flags |= DF_TEXTREL;
2509 }
2510 }
2511 }
2512
2513 local_got = elf_local_got_refcounts (ibfd);
2514 if (!local_got)
2515 continue;
2516
2517 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2518 locsymcount = symtab_hdr->sh_info;
2519 end_local_got = local_got + locsymcount;
2520 s = htab->sgot;
2521 srel = htab->srelgot;
2522 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (ibfd);
2523 for (; local_got < end_local_got; ++local_got)
2524 {
2525 if (*local_got > 0)
2526 {
2527 *local_got = s->size;
2528
2529 /* TLS GD requires two GOT and two relocs. */
2530 if (local_tls_type != NULL && *local_tls_type == TLS_GD)
2531 s->size += 8;
2532 else
2533 s->size += 4;
2534 if (info->shared)
2535 {
2536 if (local_tls_type != NULL && *local_tls_type == TLS_GD)
2537 srel->size += 2 * sizeof (Elf32_External_Rela);
2538 else
2539 srel->size += sizeof (Elf32_External_Rela);
2540 }
2541 }
2542 else
2543
2544 *local_got = (bfd_vma) -1;
2545
2546 if (local_tls_type)
2547 ++local_tls_type;
2548 }
2549 }
2550
2551 /* Allocate global sym .plt and .got entries, and space for global
2552 sym dynamic relocs. */
2553 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
2554
2555 /* We now have determined the sizes of the various dynamic sections.
2556 Allocate memory for them. */
2557 relocs = FALSE;
2558 for (s = dynobj->sections; s != NULL; s = s->next)
2559 {
2560 if ((s->flags & SEC_LINKER_CREATED) == 0)
2561 continue;
2562
2563 if (s == htab->splt
2564 || s == htab->sgot
2565 || s == htab->sgotplt
2566 || s == htab->sdynbss)
2567 {
2568 /* Strip this section if we don't need it; see the
2569 comment below. */
2570 }
2571 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2572 {
2573 if (s->size != 0 && s != htab->srelplt)
2574 relocs = TRUE;
2575
2576 /* We use the reloc_count field as a counter if we need
2577 to copy relocs into the output file. */
2578 s->reloc_count = 0;
2579 }
2580 else
2581 /* It's not one of our sections, so don't allocate space. */
2582 continue;
2583
2584 if (s->size == 0)
2585 {
2586 /* If we don't need this section, strip it from the
2587 output file. This is mostly to handle .rela.bss and
2588 .rela.plt. We must create both sections in
2589 create_dynamic_sections, because they must be created
2590 before the linker maps input sections to output
2591 sections. The linker does that before
2592 adjust_dynamic_symbol is called, and it is that
2593 function which decides whether anything needs to go
2594 into these sections. */
2595 s->flags |= SEC_EXCLUDE;
2596 continue;
2597 }
2598
2599 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2600 continue;
2601
2602 /* Allocate memory for the section contents. We use bfd_zalloc
2603 here in case unused entries are not reclaimed before the
2604 section's contents are written out. This should not happen,
2605 but this way if it does, we get a R_OR1K_NONE reloc instead
2606 of garbage. */
2607 s->contents = bfd_zalloc (dynobj, s->size);
2608
2609 if (s->contents == NULL)
2610 return FALSE;
2611 }
2612
2613 if (htab->root.dynamic_sections_created)
2614 {
2615 /* Add some entries to the .dynamic section. We fill in the
2616 values later, in or1k_elf_finish_dynamic_sections, but we
2617 must add the entries now so that we get the correct size for
2618 the .dynamic section. The DT_DEBUG entry is filled in by the
2619 dynamic linker and used by the debugger. */
2620 #define add_dynamic_entry(TAG, VAL) \
2621 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2622
2623 if (info->executable)
2624 {
2625 if (! add_dynamic_entry (DT_DEBUG, 0))
2626 return FALSE;
2627 }
2628
2629 if (htab->splt->size != 0)
2630 {
2631 if (! add_dynamic_entry (DT_PLTGOT, 0)
2632 || ! add_dynamic_entry (DT_PLTRELSZ, 0)
2633 || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
2634 || ! add_dynamic_entry (DT_JMPREL, 0))
2635 return FALSE;
2636 }
2637
2638 if (relocs)
2639 {
2640 if (! add_dynamic_entry (DT_RELA, 0)
2641 || ! add_dynamic_entry (DT_RELASZ, 0)
2642 || ! add_dynamic_entry (DT_RELAENT,
2643 sizeof (Elf32_External_Rela)))
2644 return FALSE;
2645
2646 /* If any dynamic relocs apply to a read-only section,
2647 then we need a DT_TEXTREL entry. */
2648 if ((info->flags & DF_TEXTREL) == 0)
2649 elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
2650 info);
2651
2652 if ((info->flags & DF_TEXTREL) != 0)
2653 {
2654 if (! add_dynamic_entry (DT_TEXTREL, 0))
2655 return FALSE;
2656 }
2657 }
2658 }
2659
2660 #undef add_dynamic_entry
2661 return TRUE;
2662 }
2663
2664 /* Create dynamic sections when linking against a dynamic object. */
2665
2666 static bfd_boolean
2667 or1k_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2668 {
2669 struct elf_or1k_link_hash_table *htab;
2670
2671 htab = or1k_elf_hash_table (info);
2672 if (htab == NULL)
2673 return FALSE;
2674
2675 if (!htab->sgot && !create_got_section (dynobj, info))
2676 return FALSE;
2677
2678 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2679 return FALSE;
2680
2681 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2682 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
2683 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2684 if (!info->shared)
2685 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
2686
2687 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2688 || (!info->shared && !htab->srelbss))
2689 abort ();
2690
2691 return TRUE;
2692 }
2693
2694 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2695
2696 static void
2697 or1k_elf_copy_indirect_symbol (struct bfd_link_info *info,
2698 struct elf_link_hash_entry *dir,
2699 struct elf_link_hash_entry *ind)
2700 {
2701 struct elf_or1k_link_hash_entry * edir;
2702 struct elf_or1k_link_hash_entry * eind;
2703
2704 edir = (struct elf_or1k_link_hash_entry *) dir;
2705 eind = (struct elf_or1k_link_hash_entry *) ind;
2706
2707 if (eind->dyn_relocs != NULL)
2708 {
2709 if (edir->dyn_relocs != NULL)
2710 {
2711 struct elf_or1k_dyn_relocs **pp;
2712 struct elf_or1k_dyn_relocs *p;
2713
2714 /* Add reloc counts against the indirect sym to the direct sym
2715 list. Merge any entries against the same section. */
2716 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2717 {
2718 struct elf_or1k_dyn_relocs *q;
2719
2720 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2721 if (q->sec == p->sec)
2722 {
2723 q->pc_count += p->pc_count;
2724 q->count += p->count;
2725 *pp = p->next;
2726 break;
2727 }
2728 if (q == NULL)
2729 pp = &p->next;
2730 }
2731 *pp = edir->dyn_relocs;
2732 }
2733
2734 edir->dyn_relocs = eind->dyn_relocs;
2735 eind->dyn_relocs = NULL;
2736 }
2737
2738 if (ind->root.type == bfd_link_hash_indirect)
2739 {
2740 if (dir->got.refcount <= 0)
2741 {
2742 edir->tls_type = eind->tls_type;
2743 eind->tls_type = TLS_UNKNOWN;
2744 }
2745 }
2746
2747 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2748 }
2749
2750 /* Set the right machine number. */
2751
2752 static bfd_boolean
2753 or1k_elf_object_p (bfd *abfd)
2754 {
2755 unsigned long mach = bfd_mach_or1k;
2756
2757 if (elf_elfheader (abfd)->e_flags & EF_OR1K_NODELAY)
2758 mach = bfd_mach_or1knd;
2759
2760 return bfd_default_set_arch_mach (abfd, bfd_arch_or1k, mach);
2761 }
2762
2763 /* Store the machine number in the flags field. */
2764
2765 static void
2766 or1k_elf_final_write_processing (bfd *abfd,
2767 bfd_boolean linker ATTRIBUTE_UNUSED)
2768 {
2769 switch (bfd_get_mach (abfd))
2770 {
2771 default:
2772 case bfd_mach_or1k:
2773 break;
2774 case bfd_mach_or1knd:
2775 elf_elfheader (abfd)->e_flags |= EF_OR1K_NODELAY;
2776 break;
2777 }
2778 }
2779
2780 static bfd_boolean
2781 or1k_elf_set_private_flags (bfd *abfd, flagword flags)
2782 {
2783 BFD_ASSERT (!elf_flags_init (abfd)
2784 || elf_elfheader (abfd)->e_flags == flags);
2785
2786 elf_elfheader (abfd)->e_flags = flags;
2787 elf_flags_init (abfd) = TRUE;
2788 return TRUE;
2789 }
2790
2791 /* Make sure all input files are consistent with respect to
2792 EF_OR1K_NODELAY flag setting. */
2793
2794 static bfd_boolean
2795 elf32_or1k_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2796 {
2797 flagword out_flags;
2798 flagword in_flags;
2799
2800 in_flags = elf_elfheader (ibfd)->e_flags;
2801 out_flags = elf_elfheader (obfd)->e_flags;
2802
2803 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2804 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2805 return TRUE;
2806
2807 if (!elf_flags_init (obfd))
2808 {
2809 elf_flags_init (obfd) = TRUE;
2810 elf_elfheader (obfd)->e_flags = in_flags;
2811
2812 return TRUE;
2813 }
2814
2815 if (in_flags == out_flags)
2816 return TRUE;
2817
2818 if ((in_flags & EF_OR1K_NODELAY) != (out_flags & EF_OR1K_NODELAY))
2819 {
2820 (*_bfd_error_handler)
2821 (_("%B: EF_OR1K_NODELAY flag mismatch with previous modules"), ibfd);
2822
2823 bfd_set_error (bfd_error_bad_value);
2824 return FALSE;
2825 }
2826
2827 return TRUE;
2828
2829 }
2830
2831 #define ELF_ARCH bfd_arch_or1k
2832 #define ELF_MACHINE_CODE EM_OR1K
2833 #define ELF_TARGET_ID OR1K_ELF_DATA
2834 #define ELF_MAXPAGESIZE 0x2000
2835
2836 #define TARGET_BIG_SYM bfd_elf32_or1k_vec
2837 #define TARGET_BIG_NAME "elf32-or1k"
2838
2839 #define elf_info_to_howto_rel NULL
2840 #define elf_info_to_howto or1k_info_to_howto_rela
2841 #define elf_backend_relocate_section or1k_elf_relocate_section
2842 #define elf_backend_gc_mark_hook or1k_elf_gc_mark_hook
2843 #define elf_backend_gc_sweep_hook or1k_elf_gc_sweep_hook
2844 #define elf_backend_check_relocs or1k_elf_check_relocs
2845 #define elf_backend_reloc_type_class or1k_elf_reloc_type_class
2846 #define elf_backend_can_gc_sections 1
2847 #define elf_backend_rela_normal 1
2848
2849 #define bfd_elf32_mkobject elf_or1k_mkobject
2850
2851 #define bfd_elf32_bfd_merge_private_bfd_data elf32_or1k_merge_private_bfd_data
2852 #define bfd_elf32_bfd_set_private_flags or1k_elf_set_private_flags
2853 #define bfd_elf32_bfd_reloc_type_lookup or1k_reloc_type_lookup
2854 #define bfd_elf32_bfd_reloc_name_lookup or1k_reloc_name_lookup
2855
2856 #define elf_backend_object_p or1k_elf_object_p
2857 #define elf_backend_final_write_processing or1k_elf_final_write_processing
2858 #define elf_backend_can_refcount 1
2859
2860 #define elf_backend_plt_readonly 1
2861 #define elf_backend_want_got_plt 1
2862 #define elf_backend_want_plt_sym 0
2863 #define elf_backend_got_header_size 12
2864 #define bfd_elf32_bfd_link_hash_table_create or1k_elf_link_hash_table_create
2865 #define elf_backend_copy_indirect_symbol or1k_elf_copy_indirect_symbol
2866 #define elf_backend_create_dynamic_sections or1k_elf_create_dynamic_sections
2867 #define elf_backend_finish_dynamic_sections or1k_elf_finish_dynamic_sections
2868 #define elf_backend_size_dynamic_sections or1k_elf_size_dynamic_sections
2869 #define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol
2870 #define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol
2871
2872 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.089701 seconds and 4 git commands to generate.