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Fix encoding or OpenRisk1000 PC relative relocations.
[deliverable/binutils-gdb.git] / bfd / elf32-or1k.c
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 (info->relocatable)
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, info->shared, h)
913 || (info->shared
914 && SYMBOL_REFERENCES_LOCAL (info, h)))
915 {
916 /* This is actually a static link, or it is a
917 -Bsymbolic link and the symbol is defined
918 locally, or the symbol was forced to be local
919 because of a version file. We must initialize
920 this entry in the global offset table. Since the
921 offset must always be a multiple of 4, we use the
922 least significant bit to record whether we have
923 initialized it already.
924
925 When doing a dynamic link, we create a .rela.got
926 relocation entry to initialize the value. This
927 is done in the finish_dynamic_symbol routine. */
928 if ((off & 1) != 0)
929 off &= ~1;
930 else
931 {
932 /* Write entry in GOT. */
933 bfd_put_32 (output_bfd, relocation,
934 sgot->contents + off);
935 /* Mark GOT entry as having been written. */
936 h->got.offset |= 1;
937 }
938 }
939
940 relocation = sgot->output_offset + off;
941 }
942 else
943 {
944 bfd_vma off;
945 bfd_byte *loc;
946
947 BFD_ASSERT (local_got_offsets != NULL
948 && local_got_offsets[r_symndx] != (bfd_vma) -1);
949
950 /* Get offset into GOT table. */
951 off = local_got_offsets[r_symndx];
952
953 /* The offset must always be a multiple of 4. We use
954 the least significant bit to record whether we have
955 already processed this entry. */
956 if ((off & 1) != 0)
957 off &= ~1;
958 else
959 {
960 /* Write entry in GOT. */
961 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
962 if (info->shared)
963 {
964 asection *srelgot;
965 Elf_Internal_Rela outrel;
966
967 /* We need to generate a R_OR1K_RELATIVE reloc
968 for the dynamic linker. */
969 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
970 BFD_ASSERT (srelgot != NULL);
971
972 outrel.r_offset = (sgot->output_section->vma
973 + sgot->output_offset
974 + off);
975 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
976 outrel.r_addend = relocation;
977 loc = srelgot->contents;
978 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
979 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
980 ++srelgot->reloc_count;
981 }
982
983 local_got_offsets[r_symndx] |= 1;
984 }
985 relocation = sgot->output_offset + off;
986 }
987
988 /* Addend should be zero. */
989 if (rel->r_addend != 0)
990 (*_bfd_error_handler)
991 (_("internal error: addend should be zero for R_OR1K_GOT16"));
992
993 break;
994
995 case R_OR1K_GOTOFF_LO16:
996 case R_OR1K_GOTOFF_HI16:
997 /* Relocation is offset from GOT. */
998 BFD_ASSERT (sgot != NULL);
999 relocation -= sgot->output_section->vma;
1000 break;
1001
1002 case R_OR1K_INSN_REL_26:
1003 case R_OR1K_HI_16_IN_INSN:
1004 case R_OR1K_LO_16_IN_INSN:
1005 case R_OR1K_32:
1006 /* R_OR1K_16? */
1007 {
1008 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1009 from removed linkonce sections, or sections discarded by
1010 a linker script. */
1011 if (r_symndx == STN_UNDEF
1012 || (input_section->flags & SEC_ALLOC) == 0)
1013 break;
1014
1015 if ((info->shared
1016 && (h == NULL
1017 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1018 || h->root.type != bfd_link_hash_undefweak)
1019 && (howto->type != R_OR1K_INSN_REL_26
1020 || !SYMBOL_CALLS_LOCAL (info, h)))
1021 || (!info->shared
1022 && h != NULL
1023 && h->dynindx != -1
1024 && !h->non_got_ref
1025 && ((h->def_dynamic
1026 && !h->def_regular)
1027 || h->root.type == bfd_link_hash_undefweak
1028 || h->root.type == bfd_link_hash_undefined)))
1029 {
1030 Elf_Internal_Rela outrel;
1031 bfd_byte *loc;
1032 bfd_boolean skip;
1033
1034 /* When generating a shared object, these relocations
1035 are copied into the output file to be resolved at run
1036 time. */
1037
1038 BFD_ASSERT (sreloc != NULL);
1039
1040 skip = FALSE;
1041
1042 outrel.r_offset =
1043 _bfd_elf_section_offset (output_bfd, info, input_section,
1044 rel->r_offset);
1045 if (outrel.r_offset == (bfd_vma) -1)
1046 skip = TRUE;
1047 else if (outrel.r_offset == (bfd_vma) -2)
1048 skip = TRUE;
1049 outrel.r_offset += (input_section->output_section->vma
1050 + input_section->output_offset);
1051
1052 if (skip)
1053 memset (&outrel, 0, sizeof outrel);
1054 /* h->dynindx may be -1 if the symbol was marked to
1055 become local. */
1056 else if (h != NULL
1057 && ((! info->symbolic && h->dynindx != -1)
1058 || !h->def_regular))
1059 {
1060 BFD_ASSERT (h->dynindx != -1);
1061 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1062 outrel.r_addend = rel->r_addend;
1063 }
1064 else
1065 {
1066 if (r_type == R_OR1K_32)
1067 {
1068 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
1069 outrel.r_addend = relocation + rel->r_addend;
1070 }
1071 else
1072 {
1073 BFD_FAIL ();
1074 (*_bfd_error_handler)
1075 (_("%B: probably compiled without -fPIC?"),
1076 input_bfd);
1077 bfd_set_error (bfd_error_bad_value);
1078 return FALSE;
1079 }
1080 }
1081
1082 loc = sreloc->contents;
1083 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1084 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1085 break;
1086 }
1087 break;
1088 }
1089
1090 case R_OR1K_TLS_LDM_HI16:
1091 case R_OR1K_TLS_LDM_LO16:
1092 case R_OR1K_TLS_LDO_HI16:
1093 case R_OR1K_TLS_LDO_LO16:
1094 /* TODO: implement support for local dynamic. */
1095 BFD_FAIL ();
1096 (*_bfd_error_handler)
1097 (_("%B: support for local dynamic not implemented"),
1098 input_bfd);
1099 bfd_set_error (bfd_error_bad_value);
1100 return FALSE;
1101
1102
1103 case R_OR1K_TLS_GD_HI16:
1104 case R_OR1K_TLS_GD_LO16:
1105 case R_OR1K_TLS_IE_HI16:
1106 case R_OR1K_TLS_IE_LO16:
1107 {
1108 bfd_vma gotoff;
1109 Elf_Internal_Rela rela;
1110 bfd_byte *loc;
1111 int dynamic;
1112
1113 sreloc = bfd_get_section_by_name (dynobj, ".rela.got");
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 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_HI16 &&
1545 ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_LO16)
1546 {
1547 if (h != NULL)
1548 h->got.refcount += 1;
1549 else
1550 {
1551 bfd_signed_vma *local_got_refcounts;
1552
1553 /* This is a global offset table entry for a local symbol. */
1554 local_got_refcounts = elf_local_got_refcounts (abfd);
1555 if (local_got_refcounts == NULL)
1556 {
1557 bfd_size_type size;
1558
1559 size = symtab_hdr->sh_info;
1560 size *= sizeof (bfd_signed_vma);
1561 local_got_refcounts = bfd_zalloc (abfd, size);
1562 if (local_got_refcounts == NULL)
1563 return FALSE;
1564 elf_local_got_refcounts (abfd) = local_got_refcounts;
1565 }
1566 local_got_refcounts[r_symndx] += 1;
1567 }
1568 }
1569 break;
1570
1571 case R_OR1K_INSN_REL_26:
1572 case R_OR1K_HI_16_IN_INSN:
1573 case R_OR1K_LO_16_IN_INSN:
1574 case R_OR1K_32:
1575 /* R_OR1K_16? */
1576 {
1577 if (h != NULL && !info->shared)
1578 {
1579 /* We may need a copy reloc. */
1580 h->non_got_ref = 1;
1581
1582 /* We may also need a .plt entry. */
1583 h->plt.refcount += 1;
1584 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26)
1585 h->pointer_equality_needed = 1;
1586 }
1587
1588 /* If we are creating a shared library, and this is a reloc
1589 against a global symbol, or a non PC relative reloc
1590 against a local symbol, then we need to copy the reloc
1591 into the shared library. However, if we are linking with
1592 -Bsymbolic, we do not need to copy a reloc against a
1593 global symbol which is defined in an object we are
1594 including in the link (i.e., DEF_REGULAR is set). At
1595 this point we have not seen all the input files, so it is
1596 possible that DEF_REGULAR is not set now but will be set
1597 later (it is never cleared). In case of a weak definition,
1598 DEF_REGULAR may be cleared later by a strong definition in
1599 a shared library. We account for that possibility below by
1600 storing information in the relocs_copied field of the hash
1601 table entry. A similar situation occurs when creating
1602 shared libraries and symbol visibility changes render the
1603 symbol local.
1604
1605 If on the other hand, we are creating an executable, we
1606 may need to keep relocations for symbols satisfied by a
1607 dynamic library if we manage to avoid copy relocs for the
1608 symbol. */
1609
1610 if ((info->shared
1611 && (sec->flags & SEC_ALLOC) != 0
1612 && (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26
1613 || (h != NULL
1614 && (!SYMBOLIC_BIND (info, h)
1615 || h->root.type == bfd_link_hash_defweak
1616 || !h->def_regular))))
1617 || (!info->shared
1618 && (sec->flags & SEC_ALLOC) != 0
1619 && h != NULL
1620 && (h->root.type == bfd_link_hash_defweak
1621 || !h->def_regular)))
1622 {
1623 struct elf_or1k_dyn_relocs *p;
1624 struct elf_or1k_dyn_relocs **head;
1625
1626 /* When creating a shared object, we must copy these
1627 relocs into the output file. We create a reloc
1628 section in dynobj and make room for the reloc. */
1629 if (sreloc == NULL)
1630 {
1631 const char *name;
1632 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1633 unsigned int shnam = _bfd_elf_single_rel_hdr (sec)->sh_name;
1634
1635 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1636 if (name == NULL)
1637 return FALSE;
1638
1639 if (strncmp (name, ".rela", 5) != 0
1640 || strcmp (bfd_get_section_name (abfd, sec),
1641 name + 5) != 0)
1642 {
1643 (*_bfd_error_handler)
1644 (_("%B: bad relocation section name `%s\'"),
1645 abfd, name);
1646 }
1647
1648 if (htab->root.dynobj == NULL)
1649 htab->root.dynobj = abfd;
1650 dynobj = htab->root.dynobj;
1651
1652 sreloc = bfd_get_section_by_name (dynobj, name);
1653 if (sreloc == NULL)
1654 {
1655 sreloc = _bfd_elf_make_dynamic_reloc_section
1656 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
1657
1658 if (sreloc == NULL)
1659 return FALSE;
1660 }
1661 elf_section_data (sec)->sreloc = sreloc;
1662 }
1663
1664 /* If this is a global symbol, we count the number of
1665 relocations we need for this symbol. */
1666 if (h != NULL)
1667 head = &((struct elf_or1k_link_hash_entry *) h)->dyn_relocs;
1668 else
1669 {
1670 /* Track dynamic relocs needed for local syms too.
1671 We really need local syms available to do this
1672 easily. Oh well. */
1673
1674 asection *s;
1675 Elf_Internal_Sym *isym;
1676 void *vpp;
1677
1678 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
1679 abfd, r_symndx);
1680 if (isym == NULL)
1681 return FALSE;
1682
1683 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1684 if (s == NULL)
1685 return FALSE;
1686
1687 vpp = &elf_section_data (s)->local_dynrel;
1688 head = (struct elf_or1k_dyn_relocs **) vpp;
1689 }
1690
1691 p = *head;
1692 if (p == NULL || p->sec != sec)
1693 {
1694 bfd_size_type amt = sizeof *p;
1695 p = ((struct elf_or1k_dyn_relocs *)
1696 bfd_alloc (htab->root.dynobj, amt));
1697 if (p == NULL)
1698 return FALSE;
1699 p->next = *head;
1700 *head = p;
1701 p->sec = sec;
1702 p->count = 0;
1703 p->pc_count = 0;
1704 }
1705
1706 p->count += 1;
1707 if (ELF32_R_TYPE (rel->r_info) == R_OR1K_INSN_REL_26)
1708 p->pc_count += 1;
1709 }
1710 }
1711 break;
1712 }
1713 }
1714
1715 return TRUE;
1716 }
1717
1718 /* Finish up the dynamic sections. */
1719
1720 static bfd_boolean
1721 or1k_elf_finish_dynamic_sections (bfd *output_bfd,
1722 struct bfd_link_info *info)
1723 {
1724 bfd *dynobj;
1725 asection *sdyn, *sgot;
1726 struct elf_or1k_link_hash_table *htab;
1727
1728 htab = or1k_elf_hash_table (info);
1729 if (htab == NULL)
1730 return FALSE;
1731
1732 dynobj = htab->root.dynobj;
1733
1734 sgot = htab->sgotplt;
1735 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1736
1737 if (htab->root.dynamic_sections_created)
1738 {
1739 asection *splt;
1740 Elf32_External_Dyn *dyncon, *dynconend;
1741
1742 BFD_ASSERT (sgot != NULL && sdyn != NULL);
1743
1744 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1745 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1746
1747 for (; dyncon < dynconend; dyncon++)
1748 {
1749 Elf_Internal_Dyn dyn;
1750 asection *s;
1751
1752 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1753
1754 switch (dyn.d_tag)
1755 {
1756 default:
1757 continue;
1758
1759 case DT_PLTGOT:
1760 s = htab->sgot->output_section;
1761 BFD_ASSERT (s != NULL);
1762 dyn.d_un.d_ptr = s->vma;
1763 break;
1764
1765 case DT_JMPREL:
1766 s = htab->srelplt->output_section;
1767 BFD_ASSERT (s != NULL);
1768 dyn.d_un.d_ptr = s->vma;
1769 break;
1770
1771 case DT_PLTRELSZ:
1772 s = htab->srelplt->output_section;
1773 BFD_ASSERT (s != NULL);
1774 dyn.d_un.d_val = s->size;
1775 break;
1776
1777 case DT_RELASZ:
1778 /* My reading of the SVR4 ABI indicates that the
1779 procedure linkage table relocs (DT_JMPREL) should be
1780 included in the overall relocs (DT_RELA). This is
1781 what Solaris does. However, UnixWare can not handle
1782 that case. Therefore, we override the DT_RELASZ entry
1783 here to make it not include the JMPREL relocs. Since
1784 the linker script arranges for .rela.plt to follow all
1785 other relocation sections, we don't have to worry
1786 about changing the DT_RELA entry. */
1787 if (htab->srelplt != NULL)
1788 {
1789 /* FIXME: this calculation sometimes produces
1790 wrong result, the problem is that the dyn.d_un.d_val
1791 is not always correct, needs investigation why
1792 that happens. In the meantime, reading the
1793 ".rela.dyn" section by name seems to yield
1794 correct result.
1795
1796 s = htab->srelplt->output_section;
1797 dyn.d_un.d_val -= s->size;
1798 */
1799
1800 s = bfd_get_section_by_name (output_bfd, ".rela.dyn");
1801 dyn.d_un.d_val = s ? s->size : 0;
1802 }
1803 break;
1804 }
1805 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1806 }
1807
1808
1809 /* Fill in the first entry in the procedure linkage table. */
1810 splt = htab->splt;
1811 if (splt && splt->size > 0)
1812 {
1813 if (info->shared)
1814 {
1815 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0,
1816 splt->contents);
1817 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1,
1818 splt->contents + 4);
1819 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2,
1820 splt->contents + 8);
1821 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3,
1822 splt->contents + 12);
1823 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4,
1824 splt->contents + 16);
1825 }
1826 else
1827 {
1828 unsigned long addr;
1829 /* addr = .got + 4 */
1830 addr = sgot->output_section->vma + sgot->output_offset + 4;
1831 bfd_put_32 (output_bfd,
1832 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
1833 splt->contents);
1834 bfd_put_32 (output_bfd,
1835 PLT0_ENTRY_WORD1 | (addr & 0xffff),
1836 splt->contents + 4);
1837 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
1838 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
1839 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
1840 }
1841
1842 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
1843 }
1844 }
1845
1846 /* Set the first entry in the global offset table to the address of
1847 the dynamic section. */
1848 if (sgot && sgot->size > 0)
1849 {
1850 if (sdyn == NULL)
1851 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1852 else
1853 bfd_put_32 (output_bfd,
1854 sdyn->output_section->vma + sdyn->output_offset,
1855 sgot->contents);
1856 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1857 }
1858
1859 if (htab->sgot && htab->sgot->size > 0)
1860 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
1861
1862 return TRUE;
1863 }
1864
1865 /* Finish up dynamic symbol handling. We set the contents of various
1866 dynamic sections here. */
1867
1868 static bfd_boolean
1869 or1k_elf_finish_dynamic_symbol (bfd *output_bfd,
1870 struct bfd_link_info *info,
1871 struct elf_link_hash_entry *h,
1872 Elf_Internal_Sym *sym)
1873 {
1874 struct elf_or1k_link_hash_table *htab;
1875 bfd_byte *loc;
1876
1877 htab = or1k_elf_hash_table (info);
1878 if (htab == NULL)
1879 return FALSE;
1880
1881 if (h->plt.offset != (bfd_vma) -1)
1882 {
1883 asection *splt;
1884 asection *sgot;
1885 asection *srela;
1886
1887 bfd_vma plt_index;
1888 bfd_vma got_offset;
1889 bfd_vma got_addr;
1890 Elf_Internal_Rela rela;
1891
1892 /* This symbol has an entry in the procedure linkage table. Set
1893 it up. */
1894 BFD_ASSERT (h->dynindx != -1);
1895
1896 splt = htab->splt;
1897 sgot = htab->sgotplt;
1898 srela = htab->srelplt;
1899 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1900
1901 /* Get the index in the procedure linkage table which
1902 corresponds to this symbol. This is the index of this symbol
1903 in all the symbols for which we are making plt entries. The
1904 first entry in the procedure linkage table is reserved. */
1905 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1906
1907 /* Get the offset into the .got table of the entry that
1908 corresponds to this function. Each .got entry is 4 bytes.
1909 The first three are reserved. */
1910 got_offset = (plt_index + 3) * 4;
1911 got_addr = got_offset;
1912
1913 /* Fill in the entry in the procedure linkage table. */
1914 if (! info->shared)
1915 {
1916 got_addr += htab->sgotplt->output_section->vma
1917 + htab->sgotplt->output_offset;
1918 bfd_put_32 (output_bfd, PLT_ENTRY_WORD0 | ((got_addr >> 16) & 0xffff),
1919 splt->contents + h->plt.offset);
1920 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1 | (got_addr & 0xffff),
1921 splt->contents + h->plt.offset + 4);
1922 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
1923 splt->contents + h->plt.offset + 8);
1924 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
1925 splt->contents + h->plt.offset + 12);
1926 bfd_put_32 (output_bfd, PLT_ENTRY_WORD4
1927 | plt_index * sizeof (Elf32_External_Rela),
1928 splt->contents + h->plt.offset + 16);
1929 }
1930 else
1931 {
1932 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0 | (got_addr & 0xffff),
1933 splt->contents + h->plt.offset);
1934 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1
1935 | plt_index * sizeof (Elf32_External_Rela),
1936 splt->contents + h->plt.offset + 4);
1937 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
1938 splt->contents + h->plt.offset + 8);
1939 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
1940 splt->contents + h->plt.offset + 12);
1941 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
1942 splt->contents + h->plt.offset + 16);
1943 }
1944
1945 /* Fill in the entry in the global offset table. */
1946 bfd_put_32 (output_bfd,
1947 (splt->output_section->vma
1948 + splt->output_offset), /* Same offset. */
1949 sgot->contents + got_offset);
1950
1951 /* Fill in the entry in the .rela.plt section. */
1952 rela.r_offset = (sgot->output_section->vma
1953 + sgot->output_offset
1954 + got_offset);
1955 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_JMP_SLOT);
1956 rela.r_addend = 0;
1957 loc = srela->contents;
1958 loc += plt_index * sizeof (Elf32_External_Rela);
1959 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1960
1961 if (!h->def_regular)
1962 {
1963 /* Mark the symbol as undefined, rather than as defined in
1964 the .plt section. Leave the value alone. */
1965 sym->st_shndx = SHN_UNDEF;
1966 }
1967
1968 }
1969
1970 if (h->got.offset != (bfd_vma) -1
1971 && (h->got.offset & 2) == 0) /* Homemade TLS check. */
1972 {
1973 asection *sgot;
1974 asection *srela;
1975 Elf_Internal_Rela rela;
1976
1977 /* This symbol has an entry in the global offset table. Set it
1978 up. */
1979 sgot = htab->sgot;
1980 srela = htab->srelgot;
1981 BFD_ASSERT (sgot != NULL && srela != NULL);
1982
1983 rela.r_offset = (sgot->output_section->vma
1984 + sgot->output_offset
1985 + (h->got.offset &~ 1));
1986
1987 /* If this is a -Bsymbolic link, and the symbol is defined
1988 locally, we just want to emit a RELATIVE reloc. Likewise if
1989 the symbol was forced to be local because of a version file.
1990 The entry in the global offset table will already have been
1991 initialized in the relocate_section function. */
1992 if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
1993 {
1994 rela.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE);
1995 rela.r_addend = (h->root.u.def.value
1996 + h->root.u.def.section->output_section->vma
1997 + h->root.u.def.section->output_offset);
1998 }
1999 else
2000 {
2001 BFD_ASSERT ((h->got.offset & 1) == 0);
2002 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2003 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_GLOB_DAT);
2004 rela.r_addend = 0;
2005 }
2006
2007 loc = srela->contents;
2008 loc += srela->reloc_count * sizeof (Elf32_External_Rela);
2009 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2010 ++srela->reloc_count;
2011 }
2012
2013 if (h->needs_copy)
2014 {
2015 asection *s;
2016 Elf_Internal_Rela rela;
2017
2018 /* This symbols needs a copy reloc. Set it up. */
2019 BFD_ASSERT (h->dynindx != -1
2020 && (h->root.type == bfd_link_hash_defined
2021 || h->root.type == bfd_link_hash_defweak));
2022
2023 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2024 ".rela.bss");
2025 BFD_ASSERT (s != NULL);
2026
2027 rela.r_offset = (h->root.u.def.value
2028 + h->root.u.def.section->output_section->vma
2029 + h->root.u.def.section->output_offset);
2030 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_COPY);
2031 rela.r_addend = 0;
2032 loc = s->contents;
2033 loc += s->reloc_count * sizeof (Elf32_External_Rela);
2034 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2035 ++s->reloc_count;
2036 }
2037
2038 /* Mark some specially defined symbols as absolute. */
2039 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2040 || h == htab->root.hgot)
2041 sym->st_shndx = SHN_ABS;
2042
2043 return TRUE;
2044 }
2045
2046 static enum elf_reloc_type_class
2047 or1k_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2048 const asection *rel_sec ATTRIBUTE_UNUSED,
2049 const Elf_Internal_Rela *rela)
2050 {
2051 switch ((int) ELF32_R_TYPE (rela->r_info))
2052 {
2053 case R_OR1K_RELATIVE: return reloc_class_relative;
2054 case R_OR1K_JMP_SLOT: return reloc_class_plt;
2055 case R_OR1K_COPY: return reloc_class_copy;
2056 default: return reloc_class_normal;
2057 }
2058 }
2059
2060 /* Adjust a symbol defined by a dynamic object and referenced by a
2061 regular object. The current definition is in some section of the
2062 dynamic object, but we're not including those sections. We have to
2063 change the definition to something the rest of the link can
2064 understand. */
2065
2066 static bfd_boolean
2067 or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2068 struct elf_link_hash_entry *h)
2069 {
2070 struct elf_or1k_link_hash_table *htab;
2071 struct elf_or1k_link_hash_entry *eh;
2072 struct elf_or1k_dyn_relocs *p;
2073 bfd *dynobj;
2074 asection *s;
2075
2076 dynobj = elf_hash_table (info)->dynobj;
2077
2078 /* Make sure we know what is going on here. */
2079 BFD_ASSERT (dynobj != NULL
2080 && (h->needs_plt
2081 || h->u.weakdef != NULL
2082 || (h->def_dynamic
2083 && h->ref_regular
2084 && !h->def_regular)));
2085
2086 /* If this is a function, put it in the procedure linkage table. We
2087 will fill in the contents of the procedure linkage table later,
2088 when we know the address of the .got section. */
2089 if (h->type == STT_FUNC
2090 || h->needs_plt)
2091 {
2092 if (! info->shared
2093 && !h->def_dynamic
2094 && !h->ref_dynamic
2095 && h->root.type != bfd_link_hash_undefweak
2096 && h->root.type != bfd_link_hash_undefined)
2097 {
2098 /* This case can occur if we saw a PLT reloc in an input
2099 file, but the symbol was never referred to by a dynamic
2100 object. In such a case, we don't actually need to build
2101 a procedure linkage table, and we can just do a PCREL
2102 reloc instead. */
2103 h->plt.offset = (bfd_vma) -1;
2104 h->needs_plt = 0;
2105 }
2106
2107 return TRUE;
2108 }
2109 else
2110 h->plt.offset = (bfd_vma) -1;
2111
2112 /* If this is a weak symbol, and there is a real definition, the
2113 processor independent code will have arranged for us to see the
2114 real definition first, and we can just use the same value. */
2115 if (h->u.weakdef != NULL)
2116 {
2117 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2118 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2119 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2120 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2121 return TRUE;
2122 }
2123
2124 /* This is a reference to a symbol defined by a dynamic object which
2125 is not a function. */
2126
2127 /* If we are creating a shared library, we must presume that the
2128 only references to the symbol are via the global offset table.
2129 For such cases we need not do anything here; the relocations will
2130 be handled correctly by relocate_section. */
2131 if (info->shared)
2132 return TRUE;
2133
2134 /* If there are no references to this symbol that do not use the
2135 GOT, we don't need to generate a copy reloc. */
2136 if (!h->non_got_ref)
2137 return TRUE;
2138
2139 /* If -z nocopyreloc was given, we won't generate them either. */
2140 if (info->nocopyreloc)
2141 {
2142 h->non_got_ref = 0;
2143 return TRUE;
2144 }
2145
2146 eh = (struct elf_or1k_link_hash_entry *) h;
2147 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2148 {
2149 s = p->sec->output_section;
2150 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
2151 break;
2152 }
2153
2154 /* If we didn't find any dynamic relocs in sections which needs the
2155 copy reloc, then we'll be keeping the dynamic relocs and avoiding
2156 the copy reloc. */
2157 if (p == NULL)
2158 {
2159 h->non_got_ref = 0;
2160 return TRUE;
2161 }
2162
2163 /* We must allocate the symbol in our .dynbss section, which will
2164 become part of the .bss section of the executable. There will be
2165 an entry for this symbol in the .dynsym section. The dynamic
2166 object will contain position independent code, so all references
2167 from the dynamic object to this symbol will go through the global
2168 offset table. The dynamic linker will use the .dynsym entry to
2169 determine the address it must put in the global offset table, so
2170 both the dynamic object and the regular object will refer to the
2171 same memory location for the variable. */
2172
2173 htab = or1k_elf_hash_table (info);
2174 if (htab == NULL)
2175 return FALSE;
2176
2177 s = htab->sdynbss;
2178 BFD_ASSERT (s != NULL);
2179
2180 /* We must generate a R_OR1K_COPY reloc to tell the dynamic linker
2181 to copy the initial value out of the dynamic object and into the
2182 runtime process image. We need to remember the offset into the
2183 .rela.bss section we are going to use. */
2184 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2185 {
2186 asection *srel;
2187
2188 srel = htab->srelbss;
2189 BFD_ASSERT (srel != NULL);
2190 srel->size += sizeof (Elf32_External_Rela);
2191 h->needs_copy = 1;
2192 }
2193
2194 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2195 }
2196
2197 /* Allocate space in .plt, .got and associated reloc sections for
2198 dynamic relocs. */
2199
2200 static bfd_boolean
2201 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2202 {
2203 struct bfd_link_info *info;
2204 struct elf_or1k_link_hash_table *htab;
2205 struct elf_or1k_link_hash_entry *eh;
2206 struct elf_or1k_dyn_relocs *p;
2207
2208 if (h->root.type == bfd_link_hash_indirect)
2209 return TRUE;
2210
2211 info = (struct bfd_link_info *) inf;
2212 htab = or1k_elf_hash_table (info);
2213 if (htab == NULL)
2214 return FALSE;
2215
2216 eh = (struct elf_or1k_link_hash_entry *) h;
2217
2218 if (htab->root.dynamic_sections_created
2219 && h->plt.refcount > 0)
2220 {
2221 /* Make sure this symbol is output as a dynamic symbol.
2222 Undefined weak syms won't yet be marked as dynamic. */
2223 if (h->dynindx == -1
2224 && !h->forced_local)
2225 {
2226 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2227 return FALSE;
2228 }
2229
2230 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
2231 {
2232 asection *s = htab->splt;
2233
2234 /* If this is the first .plt entry, make room for the special
2235 first entry. */
2236 if (s->size == 0)
2237 s->size = PLT_ENTRY_SIZE;
2238
2239 h->plt.offset = s->size;
2240
2241 /* If this symbol is not defined in a regular file, and we are
2242 not generating a shared library, then set the symbol to this
2243 location in the .plt. This is required to make function
2244 pointers compare as equal between the normal executable and
2245 the shared library. */
2246 if (! info->shared
2247 && !h->def_regular)
2248 {
2249 h->root.u.def.section = s;
2250 h->root.u.def.value = h->plt.offset;
2251 }
2252
2253 /* Make room for this entry. */
2254 s->size += PLT_ENTRY_SIZE;
2255
2256 /* We also need to make an entry in the .got.plt section, which
2257 will be placed in the .got section by the linker script. */
2258 htab->sgotplt->size += 4;
2259
2260 /* We also need to make an entry in the .rel.plt section. */
2261 htab->srelplt->size += sizeof (Elf32_External_Rela);
2262 }
2263 else
2264 {
2265 h->plt.offset = (bfd_vma) -1;
2266 h->needs_plt = 0;
2267 }
2268 }
2269 else
2270 {
2271 h->plt.offset = (bfd_vma) -1;
2272 h->needs_plt = 0;
2273 }
2274
2275 if (h->got.refcount > 0)
2276 {
2277 asection *s;
2278 bfd_boolean dyn;
2279 unsigned char tls_type;
2280
2281 /* Make sure this symbol is output as a dynamic symbol.
2282 Undefined weak syms won't yet be marked as dynamic. */
2283 if (h->dynindx == -1
2284 && !h->forced_local)
2285 {
2286 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2287 return FALSE;
2288 }
2289
2290 s = htab->sgot;
2291
2292 h->got.offset = s->size;
2293
2294 tls_type = ((struct elf_or1k_link_hash_entry *) h)->tls_type;
2295
2296 /* TLS GD requires two GOT and two relocs. */
2297 if (tls_type == TLS_GD)
2298 s->size += 8;
2299 else
2300 s->size += 4;
2301 dyn = htab->root.dynamic_sections_created;
2302 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h))
2303 {
2304 if (tls_type == TLS_GD)
2305 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
2306 else
2307 htab->srelgot->size += sizeof (Elf32_External_Rela);
2308 }
2309 }
2310 else
2311 h->got.offset = (bfd_vma) -1;
2312
2313 if (eh->dyn_relocs == NULL)
2314 return TRUE;
2315
2316 /* In the shared -Bsymbolic case, discard space allocated for
2317 dynamic pc-relative relocs against symbols which turn out to be
2318 defined in regular objects. For the normal shared case, discard
2319 space for pc-relative relocs that have become local due to symbol
2320 visibility changes. */
2321
2322 if (info->shared)
2323 {
2324 if (SYMBOL_CALLS_LOCAL (info, h))
2325 {
2326 struct elf_or1k_dyn_relocs **pp;
2327
2328 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
2329 {
2330 p->count -= p->pc_count;
2331 p->pc_count = 0;
2332 if (p->count == 0)
2333 *pp = p->next;
2334 else
2335 pp = &p->next;
2336 }
2337 }
2338
2339 /* Also discard relocs on undefined weak syms with non-default
2340 visibility. */
2341 if (eh->dyn_relocs != NULL
2342 && h->root.type == bfd_link_hash_undefweak)
2343 {
2344 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2345 eh->dyn_relocs = NULL;
2346
2347 /* Make sure undefined weak symbols are output as a dynamic
2348 symbol in PIEs. */
2349 else if (h->dynindx == -1
2350 && !h->forced_local)
2351 {
2352 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2353 return FALSE;
2354 }
2355 }
2356 }
2357 else
2358 {
2359 /* For the non-shared case, discard space for relocs against
2360 symbols which turn out to need copy relocs or are not
2361 dynamic. */
2362
2363 if (!h->non_got_ref
2364 && ((h->def_dynamic
2365 && !h->def_regular)
2366 || (htab->root.dynamic_sections_created
2367 && (h->root.type == bfd_link_hash_undefweak
2368 || h->root.type == bfd_link_hash_undefined))))
2369 {
2370 /* Make sure this symbol is output as a dynamic symbol.
2371 Undefined weak syms won't yet be marked as dynamic. */
2372 if (h->dynindx == -1
2373 && !h->forced_local)
2374 {
2375 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2376 return FALSE;
2377 }
2378
2379 /* If that succeeded, we know we'll be keeping all the
2380 relocs. */
2381 if (h->dynindx != -1)
2382 goto keep;
2383 }
2384
2385 eh->dyn_relocs = NULL;
2386
2387 keep: ;
2388 }
2389
2390 /* Finally, allocate space. */
2391 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2392 {
2393 asection *sreloc = elf_section_data (p->sec)->sreloc;
2394 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2395 }
2396
2397 return TRUE;
2398 }
2399
2400 /* Find any dynamic relocs that apply to read-only sections. */
2401
2402 static bfd_boolean
2403 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2404 {
2405 struct elf_or1k_link_hash_entry *eh;
2406 struct elf_or1k_dyn_relocs *p;
2407
2408 eh = (struct elf_or1k_link_hash_entry *) h;
2409 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2410 {
2411 asection *s = p->sec->output_section;
2412
2413 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2414 {
2415 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2416
2417 info->flags |= DF_TEXTREL;
2418
2419 /* Not an error, just cut short the traversal. */
2420 return FALSE;
2421 }
2422 }
2423 return TRUE;
2424 }
2425
2426 /* Set the sizes of the dynamic sections. */
2427
2428 static bfd_boolean
2429 or1k_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2430 struct bfd_link_info *info)
2431 {
2432 struct elf_or1k_link_hash_table *htab;
2433 bfd *dynobj;
2434 asection *s;
2435 bfd_boolean relocs;
2436 bfd *ibfd;
2437
2438 htab = or1k_elf_hash_table (info);
2439 if (htab == NULL)
2440 return FALSE;
2441
2442 dynobj = htab->root.dynobj;
2443 BFD_ASSERT (dynobj != NULL);
2444
2445 if (htab->root.dynamic_sections_created)
2446 {
2447 /* Set the contents of the .interp section to the interpreter. */
2448 if (info->executable)
2449 {
2450 s = bfd_get_section_by_name (dynobj, ".interp");
2451 BFD_ASSERT (s != NULL);
2452 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2453 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2454 }
2455 }
2456
2457 /* Set up .got offsets for local syms, and space for local dynamic
2458 relocs. */
2459 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2460 {
2461 bfd_signed_vma *local_got;
2462 bfd_signed_vma *end_local_got;
2463 bfd_size_type locsymcount;
2464 Elf_Internal_Shdr *symtab_hdr;
2465 unsigned char *local_tls_type;
2466 asection *srel;
2467
2468 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2469 continue;
2470
2471 for (s = ibfd->sections; s != NULL; s = s->next)
2472 {
2473 struct elf_or1k_dyn_relocs *p;
2474
2475 for (p = ((struct elf_or1k_dyn_relocs *)
2476 elf_section_data (s)->local_dynrel);
2477 p != NULL;
2478 p = p->next)
2479 {
2480 if (! bfd_is_abs_section (p->sec)
2481 && bfd_is_abs_section (p->sec->output_section))
2482 {
2483 /* Input section has been discarded, either because
2484 it is a copy of a linkonce section or due to
2485 linker script /DISCARD/, so we'll be discarding
2486 the relocs too. */
2487 }
2488 else if (p->count != 0)
2489 {
2490 srel = elf_section_data (p->sec)->sreloc;
2491 srel->size += p->count * sizeof (Elf32_External_Rela);
2492 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2493 info->flags |= DF_TEXTREL;
2494 }
2495 }
2496 }
2497
2498 local_got = elf_local_got_refcounts (ibfd);
2499 if (!local_got)
2500 continue;
2501
2502 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2503 locsymcount = symtab_hdr->sh_info;
2504 end_local_got = local_got + locsymcount;
2505 s = htab->sgot;
2506 srel = htab->srelgot;
2507 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (ibfd);
2508 for (; local_got < end_local_got; ++local_got)
2509 {
2510 if (*local_got > 0)
2511 {
2512 *local_got = s->size;
2513
2514 /* TLS GD requires two GOT and two relocs. */
2515 if (local_tls_type != NULL && *local_tls_type == TLS_GD)
2516 s->size += 8;
2517 else
2518 s->size += 4;
2519 if (info->shared)
2520 {
2521 if (local_tls_type != NULL && *local_tls_type == TLS_GD)
2522 srel->size += 2 * sizeof (Elf32_External_Rela);
2523 else
2524 srel->size += sizeof (Elf32_External_Rela);
2525 }
2526 }
2527 else
2528
2529 *local_got = (bfd_vma) -1;
2530
2531 if (local_tls_type)
2532 ++local_tls_type;
2533 }
2534 }
2535
2536 /* Allocate global sym .plt and .got entries, and space for global
2537 sym dynamic relocs. */
2538 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
2539
2540 /* We now have determined the sizes of the various dynamic sections.
2541 Allocate memory for them. */
2542 relocs = FALSE;
2543 for (s = dynobj->sections; s != NULL; s = s->next)
2544 {
2545 if ((s->flags & SEC_LINKER_CREATED) == 0)
2546 continue;
2547
2548 if (s == htab->splt
2549 || s == htab->sgot
2550 || s == htab->sgotplt
2551 || s == htab->sdynbss)
2552 {
2553 /* Strip this section if we don't need it; see the
2554 comment below. */
2555 }
2556 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2557 {
2558 if (s->size != 0 && s != htab->srelplt)
2559 relocs = TRUE;
2560
2561 /* We use the reloc_count field as a counter if we need
2562 to copy relocs into the output file. */
2563 s->reloc_count = 0;
2564 }
2565 else
2566 /* It's not one of our sections, so don't allocate space. */
2567 continue;
2568
2569 if (s->size == 0)
2570 {
2571 /* If we don't need this section, strip it from the
2572 output file. This is mostly to handle .rela.bss and
2573 .rela.plt. We must create both sections in
2574 create_dynamic_sections, because they must be created
2575 before the linker maps input sections to output
2576 sections. The linker does that before
2577 adjust_dynamic_symbol is called, and it is that
2578 function which decides whether anything needs to go
2579 into these sections. */
2580 s->flags |= SEC_EXCLUDE;
2581 continue;
2582 }
2583
2584 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2585 continue;
2586
2587 /* Allocate memory for the section contents. We use bfd_zalloc
2588 here in case unused entries are not reclaimed before the
2589 section's contents are written out. This should not happen,
2590 but this way if it does, we get a R_OR1K_NONE reloc instead
2591 of garbage. */
2592 s->contents = bfd_zalloc (dynobj, s->size);
2593
2594 if (s->contents == NULL)
2595 return FALSE;
2596 }
2597
2598 if (htab->root.dynamic_sections_created)
2599 {
2600 /* Add some entries to the .dynamic section. We fill in the
2601 values later, in or1k_elf_finish_dynamic_sections, but we
2602 must add the entries now so that we get the correct size for
2603 the .dynamic section. The DT_DEBUG entry is filled in by the
2604 dynamic linker and used by the debugger. */
2605 #define add_dynamic_entry(TAG, VAL) \
2606 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2607
2608 if (info->executable)
2609 {
2610 if (! add_dynamic_entry (DT_DEBUG, 0))
2611 return FALSE;
2612 }
2613
2614 if (htab->splt->size != 0)
2615 {
2616 if (! add_dynamic_entry (DT_PLTGOT, 0)
2617 || ! add_dynamic_entry (DT_PLTRELSZ, 0)
2618 || ! add_dynamic_entry (DT_PLTREL, DT_RELA)
2619 || ! add_dynamic_entry (DT_JMPREL, 0))
2620 return FALSE;
2621 }
2622
2623 if (relocs)
2624 {
2625 if (! add_dynamic_entry (DT_RELA, 0)
2626 || ! add_dynamic_entry (DT_RELASZ, 0)
2627 || ! add_dynamic_entry (DT_RELAENT,
2628 sizeof (Elf32_External_Rela)))
2629 return FALSE;
2630
2631 /* If any dynamic relocs apply to a read-only section,
2632 then we need a DT_TEXTREL entry. */
2633 if ((info->flags & DF_TEXTREL) == 0)
2634 elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
2635 info);
2636
2637 if ((info->flags & DF_TEXTREL) != 0)
2638 {
2639 if (! add_dynamic_entry (DT_TEXTREL, 0))
2640 return FALSE;
2641 }
2642 }
2643 }
2644
2645 #undef add_dynamic_entry
2646 return TRUE;
2647 }
2648
2649 /* Create dynamic sections when linking against a dynamic object. */
2650
2651 static bfd_boolean
2652 or1k_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2653 {
2654 struct elf_or1k_link_hash_table *htab;
2655
2656 htab = or1k_elf_hash_table (info);
2657 if (htab == NULL)
2658 return FALSE;
2659
2660 if (!htab->sgot && !create_got_section (dynobj, info))
2661 return FALSE;
2662
2663 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2664 return FALSE;
2665
2666 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2667 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
2668 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2669 if (!info->shared)
2670 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
2671
2672 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2673 || (!info->shared && !htab->srelbss))
2674 abort ();
2675
2676 return TRUE;
2677 }
2678
2679 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2680
2681 static void
2682 or1k_elf_copy_indirect_symbol (struct bfd_link_info *info,
2683 struct elf_link_hash_entry *dir,
2684 struct elf_link_hash_entry *ind)
2685 {
2686 struct elf_or1k_link_hash_entry * edir;
2687 struct elf_or1k_link_hash_entry * eind;
2688
2689 edir = (struct elf_or1k_link_hash_entry *) dir;
2690 eind = (struct elf_or1k_link_hash_entry *) ind;
2691
2692 if (eind->dyn_relocs != NULL)
2693 {
2694 if (edir->dyn_relocs != NULL)
2695 {
2696 struct elf_or1k_dyn_relocs **pp;
2697 struct elf_or1k_dyn_relocs *p;
2698
2699 /* Add reloc counts against the indirect sym to the direct sym
2700 list. Merge any entries against the same section. */
2701 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2702 {
2703 struct elf_or1k_dyn_relocs *q;
2704
2705 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2706 if (q->sec == p->sec)
2707 {
2708 q->pc_count += p->pc_count;
2709 q->count += p->count;
2710 *pp = p->next;
2711 break;
2712 }
2713 if (q == NULL)
2714 pp = &p->next;
2715 }
2716 *pp = edir->dyn_relocs;
2717 }
2718
2719 edir->dyn_relocs = eind->dyn_relocs;
2720 eind->dyn_relocs = NULL;
2721 }
2722
2723 if (ind->root.type == bfd_link_hash_indirect)
2724 {
2725 if (dir->got.refcount <= 0)
2726 {
2727 edir->tls_type = eind->tls_type;
2728 eind->tls_type = TLS_UNKNOWN;
2729 }
2730 }
2731
2732 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2733 }
2734
2735 /* Set the right machine number. */
2736
2737 static bfd_boolean
2738 or1k_elf_object_p (bfd *abfd)
2739 {
2740 unsigned long mach = bfd_mach_or1k;
2741
2742 if (elf_elfheader (abfd)->e_flags & EF_OR1K_NODELAY)
2743 mach = bfd_mach_or1knd;
2744
2745 return bfd_default_set_arch_mach (abfd, bfd_arch_or1k, mach);
2746 }
2747
2748 /* Store the machine number in the flags field. */
2749
2750 static void
2751 or1k_elf_final_write_processing (bfd *abfd,
2752 bfd_boolean linker ATTRIBUTE_UNUSED)
2753 {
2754 switch (bfd_get_mach (abfd))
2755 {
2756 default:
2757 case bfd_mach_or1k:
2758 break;
2759 case bfd_mach_or1knd:
2760 elf_elfheader (abfd)->e_flags |= EF_OR1K_NODELAY;
2761 break;
2762 }
2763 }
2764
2765 static bfd_boolean
2766 or1k_elf_set_private_flags (bfd *abfd, flagword flags)
2767 {
2768 BFD_ASSERT (!elf_flags_init (abfd)
2769 || elf_elfheader (abfd)->e_flags == flags);
2770
2771 elf_elfheader (abfd)->e_flags = flags;
2772 elf_flags_init (abfd) = TRUE;
2773 return TRUE;
2774 }
2775
2776 /* Make sure all input files are consistent with respect to
2777 EF_OR1K_NODELAY flag setting. */
2778
2779 static bfd_boolean
2780 elf32_or1k_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2781 {
2782 flagword out_flags;
2783 flagword in_flags;
2784
2785 in_flags = elf_elfheader (ibfd)->e_flags;
2786 out_flags = elf_elfheader (obfd)->e_flags;
2787
2788 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2789 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2790 return TRUE;
2791
2792 if (!elf_flags_init (obfd))
2793 {
2794 elf_flags_init (obfd) = TRUE;
2795 elf_elfheader (obfd)->e_flags = in_flags;
2796
2797 return TRUE;
2798 }
2799
2800 if (in_flags == out_flags)
2801 return TRUE;
2802
2803 if ((in_flags & EF_OR1K_NODELAY) != (out_flags & EF_OR1K_NODELAY))
2804 {
2805 (*_bfd_error_handler)
2806 (_("%B: EF_OR1K_NODELAY flag mismatch with previous modules"), ibfd);
2807
2808 bfd_set_error (bfd_error_bad_value);
2809 return FALSE;
2810 }
2811
2812 return TRUE;
2813
2814 }
2815
2816 #define ELF_ARCH bfd_arch_or1k
2817 #define ELF_MACHINE_CODE EM_OR1K
2818 #define ELF_TARGET_ID OR1K_ELF_DATA
2819 #define ELF_MAXPAGESIZE 0x2000
2820
2821 #define TARGET_BIG_SYM or1k_elf32_vec
2822 #define TARGET_BIG_NAME "elf32-or1k"
2823
2824 #define elf_info_to_howto_rel NULL
2825 #define elf_info_to_howto or1k_info_to_howto_rela
2826 #define elf_backend_relocate_section or1k_elf_relocate_section
2827 #define elf_backend_gc_mark_hook or1k_elf_gc_mark_hook
2828 #define elf_backend_gc_sweep_hook or1k_elf_gc_sweep_hook
2829 #define elf_backend_check_relocs or1k_elf_check_relocs
2830 #define elf_backend_reloc_type_class or1k_elf_reloc_type_class
2831 #define elf_backend_can_gc_sections 1
2832 #define elf_backend_rela_normal 1
2833
2834 #define bfd_elf32_mkobject elf_or1k_mkobject
2835
2836 #define bfd_elf32_bfd_merge_private_bfd_data elf32_or1k_merge_private_bfd_data
2837 #define bfd_elf32_bfd_set_private_flags or1k_elf_set_private_flags
2838 #define bfd_elf32_bfd_reloc_type_lookup or1k_reloc_type_lookup
2839 #define bfd_elf32_bfd_reloc_name_lookup or1k_reloc_name_lookup
2840
2841 #define elf_backend_object_p or1k_elf_object_p
2842 #define elf_backend_final_write_processing or1k_elf_final_write_processing
2843 #define elf_backend_can_refcount 1
2844
2845 #define elf_backend_plt_readonly 1
2846 #define elf_backend_want_got_plt 1
2847 #define elf_backend_want_plt_sym 0
2848 #define elf_backend_got_header_size 12
2849 #define bfd_elf32_bfd_link_hash_table_create or1k_elf_link_hash_table_create
2850 #define elf_backend_copy_indirect_symbol or1k_elf_copy_indirect_symbol
2851 #define elf_backend_create_dynamic_sections or1k_elf_create_dynamic_sections
2852 #define elf_backend_finish_dynamic_sections or1k_elf_finish_dynamic_sections
2853 #define elf_backend_size_dynamic_sections or1k_elf_size_dynamic_sections
2854 #define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol
2855 #define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol
2856
2857 #include "elf32-target.h"
GDB Binutils - Deliverables
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