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PR21017, microblaze missing _GLOBAL_OFFSET_TABLE_ symbol
[deliverable/binutils-gdb.git] / bfd / elf32-microblaze.c
1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
2
3 Copyright (C) 2009-2017 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 int dbg = 0;
24
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "bfdlink.h"
28 #include "libbfd.h"
29 #include "elf-bfd.h"
30 #include "elf/microblaze.h"
31 #include <assert.h>
32
33 #define USE_RELA /* Only USE_REL is actually significant, but this is
34 here are a reminder... */
35 #define INST_WORD_SIZE 4
36
37 static int ro_small_data_pointer = 0;
38 static int rw_small_data_pointer = 0;
39
40 static reloc_howto_type * microblaze_elf_howto_table [(int) R_MICROBLAZE_max];
41
42 static reloc_howto_type microblaze_elf_howto_raw[] =
43 {
44 /* This reloc does nothing. */
45 HOWTO (R_MICROBLAZE_NONE, /* Type. */
46 0, /* Rightshift. */
47 3, /* Size (0 = byte, 1 = short, 2 = long). */
48 0, /* Bitsize. */
49 FALSE, /* PC_relative. */
50 0, /* Bitpos. */
51 complain_overflow_dont, /* Complain on overflow. */
52 NULL, /* Special Function. */
53 "R_MICROBLAZE_NONE", /* Name. */
54 FALSE, /* Partial Inplace. */
55 0, /* Source Mask. */
56 0, /* Dest Mask. */
57 FALSE), /* PC relative offset? */
58
59 /* A standard 32 bit relocation. */
60 HOWTO (R_MICROBLAZE_32, /* Type. */
61 0, /* Rightshift. */
62 2, /* Size (0 = byte, 1 = short, 2 = long). */
63 32, /* Bitsize. */
64 FALSE, /* PC_relative. */
65 0, /* Bitpos. */
66 complain_overflow_bitfield, /* Complain on overflow. */
67 bfd_elf_generic_reloc,/* Special Function. */
68 "R_MICROBLAZE_32", /* Name. */
69 FALSE, /* Partial Inplace. */
70 0, /* Source Mask. */
71 0xffffffff, /* Dest Mask. */
72 FALSE), /* PC relative offset? */
73
74 /* A standard PCREL 32 bit relocation. */
75 HOWTO (R_MICROBLAZE_32_PCREL,/* Type. */
76 0, /* Rightshift. */
77 2, /* Size (0 = byte, 1 = short, 2 = long). */
78 32, /* Bitsize. */
79 TRUE, /* PC_relative. */
80 0, /* Bitpos. */
81 complain_overflow_bitfield, /* Complain on overflow. */
82 bfd_elf_generic_reloc,/* Special Function. */
83 "R_MICROBLAZE_32_PCREL", /* Name. */
84 TRUE, /* Partial Inplace. */
85 0, /* Source Mask. */
86 0xffffffff, /* Dest Mask. */
87 TRUE), /* PC relative offset? */
88
89 /* A 64 bit PCREL relocation. Table-entry not really used. */
90 HOWTO (R_MICROBLAZE_64_PCREL,/* Type. */
91 0, /* Rightshift. */
92 2, /* Size (0 = byte, 1 = short, 2 = long). */
93 16, /* Bitsize. */
94 TRUE, /* PC_relative. */
95 0, /* Bitpos. */
96 complain_overflow_dont, /* Complain on overflow. */
97 bfd_elf_generic_reloc,/* Special Function. */
98 "R_MICROBLAZE_64_PCREL", /* Name. */
99 FALSE, /* Partial Inplace. */
100 0, /* Source Mask. */
101 0x0000ffff, /* Dest Mask. */
102 TRUE), /* PC relative offset? */
103
104 /* The low half of a PCREL 32 bit relocation. */
105 HOWTO (R_MICROBLAZE_32_PCREL_LO, /* Type. */
106 0, /* Rightshift. */
107 2, /* Size (0 = byte, 1 = short, 2 = long). */
108 16, /* Bitsize. */
109 TRUE, /* PC_relative. */
110 0, /* Bitpos. */
111 complain_overflow_signed, /* Complain on overflow. */
112 bfd_elf_generic_reloc, /* Special Function. */
113 "R_MICROBLAZE_32_PCREL_LO", /* Name. */
114 FALSE, /* Partial Inplace. */
115 0, /* Source Mask. */
116 0x0000ffff, /* Dest Mask. */
117 TRUE), /* PC relative offset? */
118
119 /* A 64 bit relocation. Table entry not really used. */
120 HOWTO (R_MICROBLAZE_64, /* Type. */
121 0, /* Rightshift. */
122 2, /* Size (0 = byte, 1 = short, 2 = long). */
123 16, /* Bitsize. */
124 FALSE, /* PC_relative. */
125 0, /* Bitpos. */
126 complain_overflow_dont, /* Complain on overflow. */
127 bfd_elf_generic_reloc,/* Special Function. */
128 "R_MICROBLAZE_64", /* Name. */
129 FALSE, /* Partial Inplace. */
130 0, /* Source Mask. */
131 0x0000ffff, /* Dest Mask. */
132 FALSE), /* PC relative offset? */
133
134 /* The low half of a 32 bit relocation. */
135 HOWTO (R_MICROBLAZE_32_LO, /* Type. */
136 0, /* Rightshift. */
137 2, /* Size (0 = byte, 1 = short, 2 = long). */
138 16, /* Bitsize. */
139 FALSE, /* PC_relative. */
140 0, /* Bitpos. */
141 complain_overflow_signed, /* Complain on overflow. */
142 bfd_elf_generic_reloc,/* Special Function. */
143 "R_MICROBLAZE_32_LO", /* Name. */
144 FALSE, /* Partial Inplace. */
145 0, /* Source Mask. */
146 0x0000ffff, /* Dest Mask. */
147 FALSE), /* PC relative offset? */
148
149 /* Read-only small data section relocation. */
150 HOWTO (R_MICROBLAZE_SRO32, /* Type. */
151 0, /* Rightshift. */
152 2, /* Size (0 = byte, 1 = short, 2 = long). */
153 16, /* Bitsize. */
154 FALSE, /* PC_relative. */
155 0, /* Bitpos. */
156 complain_overflow_bitfield, /* Complain on overflow. */
157 bfd_elf_generic_reloc,/* Special Function. */
158 "R_MICROBLAZE_SRO32", /* Name. */
159 FALSE, /* Partial Inplace. */
160 0, /* Source Mask. */
161 0x0000ffff, /* Dest Mask. */
162 FALSE), /* PC relative offset? */
163
164 /* Read-write small data area relocation. */
165 HOWTO (R_MICROBLAZE_SRW32, /* Type. */
166 0, /* Rightshift. */
167 2, /* Size (0 = byte, 1 = short, 2 = long). */
168 16, /* Bitsize. */
169 FALSE, /* PC_relative. */
170 0, /* Bitpos. */
171 complain_overflow_bitfield, /* Complain on overflow. */
172 bfd_elf_generic_reloc,/* Special Function. */
173 "R_MICROBLAZE_SRW32", /* Name. */
174 FALSE, /* Partial Inplace. */
175 0, /* Source Mask. */
176 0x0000ffff, /* Dest Mask. */
177 FALSE), /* PC relative offset? */
178
179 /* This reloc does nothing. Used for relaxation. */
180 HOWTO (R_MICROBLAZE_64_NONE, /* Type. */
181 0, /* Rightshift. */
182 3, /* Size (0 = byte, 1 = short, 2 = long). */
183 0, /* Bitsize. */
184 TRUE, /* PC_relative. */
185 0, /* Bitpos. */
186 complain_overflow_dont, /* Complain on overflow. */
187 NULL, /* Special Function. */
188 "R_MICROBLAZE_64_NONE",/* Name. */
189 FALSE, /* Partial Inplace. */
190 0, /* Source Mask. */
191 0, /* Dest Mask. */
192 FALSE), /* PC relative offset? */
193
194 /* Symbol Op Symbol relocation. */
195 HOWTO (R_MICROBLAZE_32_SYM_OP_SYM, /* Type. */
196 0, /* Rightshift. */
197 2, /* Size (0 = byte, 1 = short, 2 = long). */
198 32, /* Bitsize. */
199 FALSE, /* PC_relative. */
200 0, /* Bitpos. */
201 complain_overflow_bitfield, /* Complain on overflow. */
202 bfd_elf_generic_reloc,/* Special Function. */
203 "R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */
204 FALSE, /* Partial Inplace. */
205 0, /* Source Mask. */
206 0xffffffff, /* Dest Mask. */
207 FALSE), /* PC relative offset? */
208
209 /* GNU extension to record C++ vtable hierarchy. */
210 HOWTO (R_MICROBLAZE_GNU_VTINHERIT, /* Type. */
211 0, /* Rightshift. */
212 2, /* Size (0 = byte, 1 = short, 2 = long). */
213 0, /* Bitsize. */
214 FALSE, /* PC_relative. */
215 0, /* Bitpos. */
216 complain_overflow_dont,/* Complain on overflow. */
217 NULL, /* Special Function. */
218 "R_MICROBLAZE_GNU_VTINHERIT", /* Name. */
219 FALSE, /* Partial Inplace. */
220 0, /* Source Mask. */
221 0, /* Dest Mask. */
222 FALSE), /* PC relative offset? */
223
224 /* GNU extension to record C++ vtable member usage. */
225 HOWTO (R_MICROBLAZE_GNU_VTENTRY, /* Type. */
226 0, /* Rightshift. */
227 2, /* Size (0 = byte, 1 = short, 2 = long). */
228 0, /* Bitsize. */
229 FALSE, /* PC_relative. */
230 0, /* Bitpos. */
231 complain_overflow_dont,/* Complain on overflow. */
232 _bfd_elf_rel_vtable_reloc_fn, /* Special Function. */
233 "R_MICROBLAZE_GNU_VTENTRY", /* Name. */
234 FALSE, /* Partial Inplace. */
235 0, /* Source Mask. */
236 0, /* Dest Mask. */
237 FALSE), /* PC relative offset? */
238
239 /* A 64 bit GOTPC relocation. Table-entry not really used. */
240 HOWTO (R_MICROBLAZE_GOTPC_64, /* Type. */
241 0, /* Rightshift. */
242 2, /* Size (0 = byte, 1 = short, 2 = long). */
243 16, /* Bitsize. */
244 TRUE, /* PC_relative. */
245 0, /* Bitpos. */
246 complain_overflow_dont, /* Complain on overflow. */
247 bfd_elf_generic_reloc, /* Special Function. */
248 "R_MICROBLAZE_GOTPC_64", /* Name. */
249 FALSE, /* Partial Inplace. */
250 0, /* Source Mask. */
251 0x0000ffff, /* Dest Mask. */
252 TRUE), /* PC relative offset? */
253
254 /* A 64 bit GOT relocation. Table-entry not really used. */
255 HOWTO (R_MICROBLAZE_GOT_64, /* Type. */
256 0, /* Rightshift. */
257 2, /* Size (0 = byte, 1 = short, 2 = long). */
258 16, /* Bitsize. */
259 FALSE, /* PC_relative. */
260 0, /* Bitpos. */
261 complain_overflow_dont, /* Complain on overflow. */
262 bfd_elf_generic_reloc,/* Special Function. */
263 "R_MICROBLAZE_GOT_64",/* Name. */
264 FALSE, /* Partial Inplace. */
265 0, /* Source Mask. */
266 0x0000ffff, /* Dest Mask. */
267 FALSE), /* PC relative offset? */
268
269 /* A 64 bit PLT relocation. Table-entry not really used. */
270 HOWTO (R_MICROBLAZE_PLT_64, /* Type. */
271 0, /* Rightshift. */
272 2, /* Size (0 = byte, 1 = short, 2 = long). */
273 16, /* Bitsize. */
274 TRUE, /* PC_relative. */
275 0, /* Bitpos. */
276 complain_overflow_dont, /* Complain on overflow. */
277 bfd_elf_generic_reloc,/* Special Function. */
278 "R_MICROBLAZE_PLT_64",/* Name. */
279 FALSE, /* Partial Inplace. */
280 0, /* Source Mask. */
281 0x0000ffff, /* Dest Mask. */
282 TRUE), /* PC relative offset? */
283
284 /* Table-entry not really used. */
285 HOWTO (R_MICROBLAZE_REL, /* Type. */
286 0, /* Rightshift. */
287 2, /* Size (0 = byte, 1 = short, 2 = long). */
288 16, /* Bitsize. */
289 TRUE, /* PC_relative. */
290 0, /* Bitpos. */
291 complain_overflow_dont, /* Complain on overflow. */
292 bfd_elf_generic_reloc,/* Special Function. */
293 "R_MICROBLAZE_REL", /* Name. */
294 FALSE, /* Partial Inplace. */
295 0, /* Source Mask. */
296 0x0000ffff, /* Dest Mask. */
297 TRUE), /* PC relative offset? */
298
299 /* Table-entry not really used. */
300 HOWTO (R_MICROBLAZE_JUMP_SLOT,/* Type. */
301 0, /* Rightshift. */
302 2, /* Size (0 = byte, 1 = short, 2 = long). */
303 16, /* Bitsize. */
304 TRUE, /* PC_relative. */
305 0, /* Bitpos. */
306 complain_overflow_dont, /* Complain on overflow. */
307 bfd_elf_generic_reloc,/* Special Function. */
308 "R_MICROBLAZE_JUMP_SLOT", /* Name. */
309 FALSE, /* Partial Inplace. */
310 0, /* Source Mask. */
311 0x0000ffff, /* Dest Mask. */
312 TRUE), /* PC relative offset? */
313
314 /* Table-entry not really used. */
315 HOWTO (R_MICROBLAZE_GLOB_DAT,/* Type. */
316 0, /* Rightshift. */
317 2, /* Size (0 = byte, 1 = short, 2 = long). */
318 16, /* Bitsize. */
319 TRUE, /* PC_relative. */
320 0, /* Bitpos. */
321 complain_overflow_dont, /* Complain on overflow. */
322 bfd_elf_generic_reloc,/* Special Function. */
323 "R_MICROBLAZE_GLOB_DAT", /* Name. */
324 FALSE, /* Partial Inplace. */
325 0, /* Source Mask. */
326 0x0000ffff, /* Dest Mask. */
327 TRUE), /* PC relative offset? */
328
329 /* A 64 bit GOT relative relocation. Table-entry not really used. */
330 HOWTO (R_MICROBLAZE_GOTOFF_64, /* Type. */
331 0, /* Rightshift. */
332 2, /* Size (0 = byte, 1 = short, 2 = long). */
333 16, /* Bitsize. */
334 FALSE, /* PC_relative. */
335 0, /* Bitpos. */
336 complain_overflow_dont, /* Complain on overflow. */
337 bfd_elf_generic_reloc,/* Special Function. */
338 "R_MICROBLAZE_GOTOFF_64", /* Name. */
339 FALSE, /* Partial Inplace. */
340 0, /* Source Mask. */
341 0x0000ffff, /* Dest Mask. */
342 FALSE), /* PC relative offset? */
343
344 /* A 32 bit GOT relative relocation. Table-entry not really used. */
345 HOWTO (R_MICROBLAZE_GOTOFF_32, /* Type. */
346 0, /* Rightshift. */
347 2, /* Size (0 = byte, 1 = short, 2 = long). */
348 16, /* Bitsize. */
349 FALSE, /* PC_relative. */
350 0, /* Bitpos. */
351 complain_overflow_dont, /* Complain on overflow. */
352 bfd_elf_generic_reloc, /* Special Function. */
353 "R_MICROBLAZE_GOTOFF_32", /* Name. */
354 FALSE, /* Partial Inplace. */
355 0, /* Source Mask. */
356 0x0000ffff, /* Dest Mask. */
357 FALSE), /* PC relative offset? */
358
359 /* COPY relocation. Table-entry not really used. */
360 HOWTO (R_MICROBLAZE_COPY, /* Type. */
361 0, /* Rightshift. */
362 2, /* Size (0 = byte, 1 = short, 2 = long). */
363 16, /* Bitsize. */
364 FALSE, /* PC_relative. */
365 0, /* Bitpos. */
366 complain_overflow_dont, /* Complain on overflow. */
367 bfd_elf_generic_reloc,/* Special Function. */
368 "R_MICROBLAZE_COPY", /* Name. */
369 FALSE, /* Partial Inplace. */
370 0, /* Source Mask. */
371 0x0000ffff, /* Dest Mask. */
372 FALSE), /* PC relative offset? */
373
374 /* Marker relocs for TLS. */
375 HOWTO (R_MICROBLAZE_TLS,
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_dont, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_MICROBLAZE_TLS", /* name */
384 FALSE, /* partial_inplace */
385 0, /* src_mask */
386 0x0000ffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 HOWTO (R_MICROBLAZE_TLSGD,
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_dont, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_MICROBLAZE_TLSGD", /* name */
398 FALSE, /* partial_inplace */
399 0, /* src_mask */
400 0x0000ffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 HOWTO (R_MICROBLAZE_TLSLD,
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 32, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 "R_MICROBLAZE_TLSLD", /* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0x0000ffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* Computes the load module index of the load module that contains the
418 definition of its TLS sym. */
419 HOWTO (R_MICROBLAZE_TLSDTPMOD32,
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 32, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_dont, /* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_MICROBLAZE_TLSDTPMOD32", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000ffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 /* Computes a dtv-relative displacement, the difference between the value
434 of sym+add and the base address of the thread-local storage block that
435 contains the definition of sym, minus 0x8000. Used for initializing GOT */
436 HOWTO (R_MICROBLAZE_TLSDTPREL32,
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 32, /* bitsize */
440 FALSE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_dont, /* complain_on_overflow */
443 bfd_elf_generic_reloc, /* special_function */
444 "R_MICROBLAZE_TLSDTPREL32", /* name */
445 FALSE, /* partial_inplace */
446 0, /* src_mask */
447 0x0000ffff, /* dst_mask */
448 FALSE), /* pcrel_offset */
449
450 /* Computes a dtv-relative displacement, the difference between the value
451 of sym+add and the base address of the thread-local storage block that
452 contains the definition of sym, minus 0x8000. */
453 HOWTO (R_MICROBLAZE_TLSDTPREL64,
454 0, /* rightshift */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
456 32, /* bitsize */
457 FALSE, /* pc_relative */
458 0, /* bitpos */
459 complain_overflow_dont, /* complain_on_overflow */
460 bfd_elf_generic_reloc, /* special_function */
461 "R_MICROBLAZE_TLSDTPREL64", /* name */
462 FALSE, /* partial_inplace */
463 0, /* src_mask */
464 0x0000ffff, /* dst_mask */
465 FALSE), /* pcrel_offset */
466
467 /* Computes a tp-relative displacement, the difference between the value of
468 sym+add and the value of the thread pointer (r13). */
469 HOWTO (R_MICROBLAZE_TLSGOTTPREL32,
470 0, /* rightshift */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
472 32, /* bitsize */
473 FALSE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_dont, /* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_MICROBLAZE_TLSGOTTPREL32", /* name */
478 FALSE, /* partial_inplace */
479 0, /* src_mask */
480 0x0000ffff, /* dst_mask */
481 FALSE), /* pcrel_offset */
482
483 /* Computes a tp-relative displacement, the difference between the value of
484 sym+add and the value of the thread pointer (r13). */
485 HOWTO (R_MICROBLAZE_TLSTPREL32,
486 0, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 32, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_dont, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_MICROBLAZE_TLSTPREL32", /* name */
494 FALSE, /* partial_inplace */
495 0, /* src_mask */
496 0x0000ffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 };
500
501 #ifndef NUM_ELEM
502 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
503 #endif
504 \f
505 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
506
507 static void
508 microblaze_elf_howto_init (void)
509 {
510 unsigned int i;
511
512 for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;)
513 {
514 unsigned int type;
515
516 type = microblaze_elf_howto_raw[i].type;
517
518 BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table));
519
520 microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i];
521 }
522 }
523 \f
524 static reloc_howto_type *
525 microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
526 bfd_reloc_code_real_type code)
527 {
528 enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE;
529
530 switch (code)
531 {
532 case BFD_RELOC_NONE:
533 microblaze_reloc = R_MICROBLAZE_NONE;
534 break;
535 case BFD_RELOC_MICROBLAZE_64_NONE:
536 microblaze_reloc = R_MICROBLAZE_64_NONE;
537 break;
538 case BFD_RELOC_32:
539 microblaze_reloc = R_MICROBLAZE_32;
540 break;
541 /* RVA is treated the same as 32 */
542 case BFD_RELOC_RVA:
543 microblaze_reloc = R_MICROBLAZE_32;
544 break;
545 case BFD_RELOC_32_PCREL:
546 microblaze_reloc = R_MICROBLAZE_32_PCREL;
547 break;
548 case BFD_RELOC_64_PCREL:
549 microblaze_reloc = R_MICROBLAZE_64_PCREL;
550 break;
551 case BFD_RELOC_MICROBLAZE_32_LO_PCREL:
552 microblaze_reloc = R_MICROBLAZE_32_PCREL_LO;
553 break;
554 case BFD_RELOC_64:
555 microblaze_reloc = R_MICROBLAZE_64;
556 break;
557 case BFD_RELOC_MICROBLAZE_32_LO:
558 microblaze_reloc = R_MICROBLAZE_32_LO;
559 break;
560 case BFD_RELOC_MICROBLAZE_32_ROSDA:
561 microblaze_reloc = R_MICROBLAZE_SRO32;
562 break;
563 case BFD_RELOC_MICROBLAZE_32_RWSDA:
564 microblaze_reloc = R_MICROBLAZE_SRW32;
565 break;
566 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM:
567 microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM;
568 break;
569 case BFD_RELOC_VTABLE_INHERIT:
570 microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT;
571 break;
572 case BFD_RELOC_VTABLE_ENTRY:
573 microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY;
574 break;
575 case BFD_RELOC_MICROBLAZE_64_GOTPC:
576 microblaze_reloc = R_MICROBLAZE_GOTPC_64;
577 break;
578 case BFD_RELOC_MICROBLAZE_64_GOT:
579 microblaze_reloc = R_MICROBLAZE_GOT_64;
580 break;
581 case BFD_RELOC_MICROBLAZE_64_PLT:
582 microblaze_reloc = R_MICROBLAZE_PLT_64;
583 break;
584 case BFD_RELOC_MICROBLAZE_64_GOTOFF:
585 microblaze_reloc = R_MICROBLAZE_GOTOFF_64;
586 break;
587 case BFD_RELOC_MICROBLAZE_32_GOTOFF:
588 microblaze_reloc = R_MICROBLAZE_GOTOFF_32;
589 break;
590 case BFD_RELOC_MICROBLAZE_64_TLSGD:
591 microblaze_reloc = R_MICROBLAZE_TLSGD;
592 break;
593 case BFD_RELOC_MICROBLAZE_64_TLSLD:
594 microblaze_reloc = R_MICROBLAZE_TLSLD;
595 break;
596 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL:
597 microblaze_reloc = R_MICROBLAZE_TLSDTPREL32;
598 break;
599 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL:
600 microblaze_reloc = R_MICROBLAZE_TLSDTPREL64;
601 break;
602 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD:
603 microblaze_reloc = R_MICROBLAZE_TLSDTPMOD32;
604 break;
605 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL:
606 microblaze_reloc = R_MICROBLAZE_TLSGOTTPREL32;
607 break;
608 case BFD_RELOC_MICROBLAZE_64_TLSTPREL:
609 microblaze_reloc = R_MICROBLAZE_TLSTPREL32;
610 break;
611 case BFD_RELOC_MICROBLAZE_COPY:
612 microblaze_reloc = R_MICROBLAZE_COPY;
613 break;
614 default:
615 return (reloc_howto_type *) NULL;
616 }
617
618 if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
619 /* Initialize howto table if needed. */
620 microblaze_elf_howto_init ();
621
622 return microblaze_elf_howto_table [(int) microblaze_reloc];
623 };
624
625 static reloc_howto_type *
626 microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
627 const char *r_name)
628 {
629 unsigned int i;
630
631 for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++)
632 if (microblaze_elf_howto_raw[i].name != NULL
633 && strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0)
634 return &microblaze_elf_howto_raw[i];
635
636 return NULL;
637 }
638
639 /* Set the howto pointer for a RCE ELF reloc. */
640
641 static void
642 microblaze_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
643 arelent * cache_ptr,
644 Elf_Internal_Rela * dst)
645 {
646 unsigned int r_type;
647
648 if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
649 /* Initialize howto table if needed. */
650 microblaze_elf_howto_init ();
651
652 r_type = ELF32_R_TYPE (dst->r_info);
653 if (r_type >= R_MICROBLAZE_max)
654 {
655 /* xgettext:c-format */
656 _bfd_error_handler (_("%B: unrecognised MicroBlaze reloc number: %d"),
657 abfd, r_type);
658 bfd_set_error (bfd_error_bad_value);
659 r_type = R_MICROBLAZE_NONE;
660 }
661
662 cache_ptr->howto = microblaze_elf_howto_table [r_type];
663 }
664
665 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
666
667 static bfd_boolean
668 microblaze_elf_is_local_label_name (bfd *abfd, const char *name)
669 {
670 if (name[0] == 'L' && name[1] == '.')
671 return TRUE;
672
673 if (name[0] == '$' && name[1] == 'L')
674 return TRUE;
675
676 /* With gcc, the labels go back to starting with '.', so we accept
677 the generic ELF local label syntax as well. */
678 return _bfd_elf_is_local_label_name (abfd, name);
679 }
680
681 /* The microblaze linker (like many others) needs to keep track of
682 the number of relocs that it decides to copy as dynamic relocs in
683 check_relocs for each symbol. This is so that it can later discard
684 them if they are found to be unnecessary. We store the information
685 in a field extending the regular ELF linker hash table. */
686
687 struct elf32_mb_dyn_relocs
688 {
689 struct elf32_mb_dyn_relocs *next;
690
691 /* The input section of the reloc. */
692 asection *sec;
693
694 /* Total number of relocs copied for the input section. */
695 bfd_size_type count;
696
697 /* Number of pc-relative relocs copied for the input section. */
698 bfd_size_type pc_count;
699 };
700
701 /* ELF linker hash entry. */
702
703 struct elf32_mb_link_hash_entry
704 {
705 struct elf_link_hash_entry elf;
706
707 /* Track dynamic relocs copied for this symbol. */
708 struct elf32_mb_dyn_relocs *dyn_relocs;
709
710 /* TLS Reference Types for the symbol; Updated by check_relocs */
711 #define TLS_GD 1 /* GD reloc. */
712 #define TLS_LD 2 /* LD reloc. */
713 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
714 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
715 #define TLS_TLS 16 /* Any TLS reloc. */
716 unsigned char tls_mask;
717
718 };
719
720 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD))
721 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD))
722 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL))
723 #define IS_TLS_NONE(x) (x == 0)
724
725 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
726
727 /* ELF linker hash table. */
728
729 struct elf32_mb_link_hash_table
730 {
731 struct elf_link_hash_table elf;
732
733 /* Small local sym to section mapping cache. */
734 struct sym_cache sym_sec;
735
736 /* TLS Local Dynamic GOT Entry */
737 union {
738 bfd_signed_vma refcount;
739 bfd_vma offset;
740 } tlsld_got;
741 };
742
743 /* Nonzero if this section has TLS related relocations. */
744 #define has_tls_reloc sec_flg0
745
746 /* Get the ELF linker hash table from a link_info structure. */
747
748 #define elf32_mb_hash_table(p) \
749 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
750 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL)
751
752 /* Create an entry in a microblaze ELF linker hash table. */
753
754 static struct bfd_hash_entry *
755 link_hash_newfunc (struct bfd_hash_entry *entry,
756 struct bfd_hash_table *table,
757 const char *string)
758 {
759 /* Allocate the structure if it has not already been allocated by a
760 subclass. */
761 if (entry == NULL)
762 {
763 entry = bfd_hash_allocate (table,
764 sizeof (struct elf32_mb_link_hash_entry));
765 if (entry == NULL)
766 return entry;
767 }
768
769 /* Call the allocation method of the superclass. */
770 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
771 if (entry != NULL)
772 {
773 struct elf32_mb_link_hash_entry *eh;
774
775 eh = (struct elf32_mb_link_hash_entry *) entry;
776 eh->dyn_relocs = NULL;
777 eh->tls_mask = 0;
778 }
779
780 return entry;
781 }
782
783 /* Create a mb ELF linker hash table. */
784
785 static struct bfd_link_hash_table *
786 microblaze_elf_link_hash_table_create (bfd *abfd)
787 {
788 struct elf32_mb_link_hash_table *ret;
789 bfd_size_type amt = sizeof (struct elf32_mb_link_hash_table);
790
791 ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt);
792 if (ret == NULL)
793 return NULL;
794
795 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
796 sizeof (struct elf32_mb_link_hash_entry),
797 MICROBLAZE_ELF_DATA))
798 {
799 free (ret);
800 return NULL;
801 }
802
803 return &ret->elf.root;
804 }
805 \f
806 /* Set the values of the small data pointers. */
807
808 static void
809 microblaze_elf_final_sdp (struct bfd_link_info *info)
810 {
811 struct bfd_link_hash_entry *h;
812
813 h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
814 if (h != (struct bfd_link_hash_entry *) NULL
815 && h->type == bfd_link_hash_defined)
816 ro_small_data_pointer = (h->u.def.value
817 + h->u.def.section->output_section->vma
818 + h->u.def.section->output_offset);
819
820 h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
821 if (h != (struct bfd_link_hash_entry *) NULL
822 && h->type == bfd_link_hash_defined)
823 rw_small_data_pointer = (h->u.def.value
824 + h->u.def.section->output_section->vma
825 + h->u.def.section->output_offset);
826 }
827
828 static bfd_vma
829 dtprel_base (struct bfd_link_info *info)
830 {
831 /* If tls_sec is NULL, we should have signalled an error already. */
832 if (elf_hash_table (info)->tls_sec == NULL)
833 return 0;
834 return elf_hash_table (info)->tls_sec->vma;
835 }
836
837 /* The size of the thread control block. */
838 #define TCB_SIZE 8
839
840 /* Output a simple dynamic relocation into SRELOC. */
841
842 static void
843 microblaze_elf_output_dynamic_relocation (bfd *output_bfd,
844 asection *sreloc,
845 unsigned long reloc_index,
846 unsigned long indx,
847 int r_type,
848 bfd_vma offset,
849 bfd_vma addend)
850 {
851
852 Elf_Internal_Rela rel;
853
854 rel.r_info = ELF32_R_INFO (indx, r_type);
855 rel.r_offset = offset;
856 rel.r_addend = addend;
857
858 bfd_elf32_swap_reloca_out (output_bfd, &rel,
859 (sreloc->contents + reloc_index * sizeof (Elf32_External_Rela)));
860 }
861
862 /* This code is taken from elf32-m32r.c
863 There is some attempt to make this function usable for many architectures,
864 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
865 if only to serve as a learning tool.
866
867 The RELOCATE_SECTION function is called by the new ELF backend linker
868 to handle the relocations for a section.
869
870 The relocs are always passed as Rela structures; if the section
871 actually uses Rel structures, the r_addend field will always be
872 zero.
873
874 This function is responsible for adjust the section contents as
875 necessary, and (if using Rela relocs and generating a
876 relocatable output file) adjusting the reloc addend as
877 necessary.
878
879 This function does not have to worry about setting the reloc
880 address or the reloc symbol index.
881
882 LOCAL_SYMS is a pointer to the swapped in local symbols.
883
884 LOCAL_SECTIONS is an array giving the section in the input file
885 corresponding to the st_shndx field of each local symbol.
886
887 The global hash table entry for the global symbols can be found
888 via elf_sym_hashes (input_bfd).
889
890 When generating relocatable output, this function must handle
891 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
892 going to be the section symbol corresponding to the output
893 section, which means that the addend must be adjusted
894 accordingly. */
895
896 static bfd_boolean
897 microblaze_elf_relocate_section (bfd *output_bfd,
898 struct bfd_link_info *info,
899 bfd *input_bfd,
900 asection *input_section,
901 bfd_byte *contents,
902 Elf_Internal_Rela *relocs,
903 Elf_Internal_Sym *local_syms,
904 asection **local_sections)
905 {
906 struct elf32_mb_link_hash_table *htab;
907 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
908 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
909 Elf_Internal_Rela *rel, *relend;
910 int endian = (bfd_little_endian (output_bfd)) ? 0 : 2;
911 /* Assume success. */
912 bfd_boolean ret = TRUE;
913 asection *sreloc;
914 bfd_vma *local_got_offsets;
915 unsigned int tls_type;
916
917 if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1])
918 microblaze_elf_howto_init ();
919
920 htab = elf32_mb_hash_table (info);
921 if (htab == NULL)
922 return FALSE;
923
924 local_got_offsets = elf_local_got_offsets (input_bfd);
925
926 sreloc = elf_section_data (input_section)->sreloc;
927
928 rel = relocs;
929 relend = relocs + input_section->reloc_count;
930 for (; rel < relend; rel++)
931 {
932 int r_type;
933 reloc_howto_type *howto;
934 unsigned long r_symndx;
935 bfd_vma addend = rel->r_addend;
936 bfd_vma offset = rel->r_offset;
937 struct elf_link_hash_entry *h;
938 Elf_Internal_Sym *sym;
939 asection *sec;
940 const char *sym_name;
941 bfd_reloc_status_type r = bfd_reloc_ok;
942 const char *errmsg = NULL;
943 bfd_boolean unresolved_reloc = FALSE;
944
945 h = NULL;
946 r_type = ELF32_R_TYPE (rel->r_info);
947 tls_type = 0;
948
949 if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max)
950 {
951 /* xgettext:c-format */
952 _bfd_error_handler (_("%B: unknown relocation type %d"),
953 input_bfd, (int) r_type);
954 bfd_set_error (bfd_error_bad_value);
955 ret = FALSE;
956 continue;
957 }
958
959 howto = microblaze_elf_howto_table[r_type];
960 r_symndx = ELF32_R_SYM (rel->r_info);
961
962 if (bfd_link_relocatable (info))
963 {
964 /* This is a relocatable link. We don't have to change
965 anything, unless the reloc is against a section symbol,
966 in which case we have to adjust according to where the
967 section symbol winds up in the output section. */
968 sec = NULL;
969 if (r_symndx >= symtab_hdr->sh_info)
970 /* External symbol. */
971 continue;
972
973 /* Local symbol. */
974 sym = local_syms + r_symndx;
975 sym_name = "<local symbol>";
976 /* STT_SECTION: symbol is associated with a section. */
977 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
978 /* Symbol isn't associated with a section. Nothing to do. */
979 continue;
980
981 sec = local_sections[r_symndx];
982 addend += sec->output_offset + sym->st_value;
983 #ifndef USE_REL
984 /* This can't be done for USE_REL because it doesn't mean anything
985 and elf_link_input_bfd asserts this stays zero. */
986 /* rel->r_addend = addend; */
987 #endif
988
989 #ifndef USE_REL
990 /* Addends are stored with relocs. We're done. */
991 continue;
992 #else /* USE_REL */
993 /* If partial_inplace, we need to store any additional addend
994 back in the section. */
995 if (!howto->partial_inplace)
996 continue;
997 /* ??? Here is a nice place to call a special_function like handler. */
998 r = _bfd_relocate_contents (howto, input_bfd, addend,
999 contents + offset);
1000 #endif /* USE_REL */
1001 }
1002 else
1003 {
1004 bfd_vma relocation;
1005
1006 /* This is a final link. */
1007 sym = NULL;
1008 sec = NULL;
1009 unresolved_reloc = FALSE;
1010
1011 if (r_symndx < symtab_hdr->sh_info)
1012 {
1013 /* Local symbol. */
1014 sym = local_syms + r_symndx;
1015 sec = local_sections[r_symndx];
1016 if (sec == 0)
1017 continue;
1018 sym_name = "<local symbol>";
1019 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1020 /* r_addend may have changed if the reference section was
1021 a merge section. */
1022 addend = rel->r_addend;
1023 }
1024 else
1025 {
1026 /* External symbol. */
1027 bfd_boolean warned ATTRIBUTE_UNUSED;
1028 bfd_boolean ignored ATTRIBUTE_UNUSED;
1029
1030 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1031 r_symndx, symtab_hdr, sym_hashes,
1032 h, sec, relocation,
1033 unresolved_reloc, warned, ignored);
1034 sym_name = h->root.root.string;
1035 }
1036
1037 /* Sanity check the address. */
1038 if (offset > bfd_get_section_limit (input_bfd, input_section))
1039 {
1040 r = bfd_reloc_outofrange;
1041 goto check_reloc;
1042 }
1043
1044 switch ((int) r_type)
1045 {
1046 case (int) R_MICROBLAZE_SRO32 :
1047 {
1048 const char *name;
1049
1050 /* Only relocate if the symbol is defined. */
1051 if (sec)
1052 {
1053 name = bfd_get_section_name (sec->owner, sec);
1054
1055 if (strcmp (name, ".sdata2") == 0
1056 || strcmp (name, ".sbss2") == 0)
1057 {
1058 if (ro_small_data_pointer == 0)
1059 microblaze_elf_final_sdp (info);
1060 if (ro_small_data_pointer == 0)
1061 {
1062 ret = FALSE;
1063 r = bfd_reloc_undefined;
1064 goto check_reloc;
1065 }
1066
1067 /* At this point `relocation' contains the object's
1068 address. */
1069 relocation -= ro_small_data_pointer;
1070 /* Now it contains the offset from _SDA2_BASE_. */
1071 r = _bfd_final_link_relocate (howto, input_bfd,
1072 input_section,
1073 contents, offset,
1074 relocation, addend);
1075 }
1076 else
1077 {
1078 _bfd_error_handler
1079 /* xgettext:c-format */
1080 (_("%B: The target (%s) of an %s relocation"
1081 " is in the wrong section (%A)"),
1082 input_bfd,
1083 sym_name,
1084 microblaze_elf_howto_table[(int) r_type]->name,
1085 sec);
1086 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1087 ret = FALSE;
1088 continue;
1089 }
1090 }
1091 }
1092 break;
1093
1094 case (int) R_MICROBLAZE_SRW32 :
1095 {
1096 const char *name;
1097
1098 /* Only relocate if the symbol is defined. */
1099 if (sec)
1100 {
1101 name = bfd_get_section_name (sec->owner, sec);
1102
1103 if (strcmp (name, ".sdata") == 0
1104 || strcmp (name, ".sbss") == 0)
1105 {
1106 if (rw_small_data_pointer == 0)
1107 microblaze_elf_final_sdp (info);
1108 if (rw_small_data_pointer == 0)
1109 {
1110 ret = FALSE;
1111 r = bfd_reloc_undefined;
1112 goto check_reloc;
1113 }
1114
1115 /* At this point `relocation' contains the object's
1116 address. */
1117 relocation -= rw_small_data_pointer;
1118 /* Now it contains the offset from _SDA_BASE_. */
1119 r = _bfd_final_link_relocate (howto, input_bfd,
1120 input_section,
1121 contents, offset,
1122 relocation, addend);
1123 }
1124 else
1125 {
1126 _bfd_error_handler
1127 /* xgettext:c-format */
1128 (_("%B: The target (%s) of an %s relocation"
1129 " is in the wrong section (%A)"),
1130 input_bfd,
1131 sym_name,
1132 microblaze_elf_howto_table[(int) r_type]->name,
1133 sec);
1134 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1135 ret = FALSE;
1136 continue;
1137 }
1138 }
1139 }
1140 break;
1141
1142 case (int) R_MICROBLAZE_32_SYM_OP_SYM:
1143 break; /* Do nothing. */
1144
1145 case (int) R_MICROBLAZE_GOTPC_64:
1146 relocation = (htab->elf.sgotplt->output_section->vma
1147 + htab->elf.sgotplt->output_offset);
1148 relocation -= (input_section->output_section->vma
1149 + input_section->output_offset
1150 + offset + INST_WORD_SIZE);
1151 relocation += addend;
1152 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1153 contents + offset + endian);
1154 bfd_put_16 (input_bfd, relocation & 0xffff,
1155 contents + offset + endian + INST_WORD_SIZE);
1156 break;
1157
1158 case (int) R_MICROBLAZE_PLT_64:
1159 {
1160 bfd_vma immediate;
1161 if (htab->elf.splt != NULL && h != NULL
1162 && h->plt.offset != (bfd_vma) -1)
1163 {
1164 relocation = (htab->elf.splt->output_section->vma
1165 + htab->elf.splt->output_offset
1166 + h->plt.offset);
1167 unresolved_reloc = FALSE;
1168 immediate = relocation - (input_section->output_section->vma
1169 + input_section->output_offset
1170 + offset + INST_WORD_SIZE);
1171 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1172 contents + offset + endian);
1173 bfd_put_16 (input_bfd, immediate & 0xffff,
1174 contents + offset + endian + INST_WORD_SIZE);
1175 }
1176 else
1177 {
1178 relocation -= (input_section->output_section->vma
1179 + input_section->output_offset
1180 + offset + INST_WORD_SIZE);
1181 immediate = relocation;
1182 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1183 contents + offset + endian);
1184 bfd_put_16 (input_bfd, immediate & 0xffff,
1185 contents + offset + endian + INST_WORD_SIZE);
1186 }
1187 break;
1188 }
1189
1190 case (int) R_MICROBLAZE_TLSGD:
1191 tls_type = (TLS_TLS | TLS_GD);
1192 goto dogot;
1193 case (int) R_MICROBLAZE_TLSLD:
1194 tls_type = (TLS_TLS | TLS_LD);
1195 /* Fall through. */
1196 dogot:
1197 case (int) R_MICROBLAZE_GOT_64:
1198 {
1199 bfd_vma *offp;
1200 bfd_vma off, off2;
1201 unsigned long indx;
1202 bfd_vma static_value;
1203
1204 bfd_boolean need_relocs = FALSE;
1205 if (htab->elf.sgot == NULL)
1206 abort ();
1207
1208 indx = 0;
1209 offp = NULL;
1210
1211 /* 1. Identify GOT Offset;
1212 2. Compute Static Values
1213 3. Process Module Id, Process Offset
1214 4. Fixup Relocation with GOT offset value. */
1215
1216 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1217 if (IS_TLS_LD (tls_type))
1218 offp = &htab->tlsld_got.offset;
1219 else if (h != NULL)
1220 {
1221 if (htab->elf.sgotplt != NULL
1222 && h->got.offset != (bfd_vma) -1)
1223 offp = &h->got.offset;
1224 else
1225 abort ();
1226 }
1227 else
1228 {
1229 if (local_got_offsets == NULL)
1230 abort ();
1231 offp = &local_got_offsets[r_symndx];
1232 }
1233
1234 if (!offp)
1235 abort ();
1236
1237 off = (*offp) & ~1;
1238 off2 = off;
1239
1240 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type))
1241 off2 = off + 4;
1242
1243 /* Symbol index to use for relocs */
1244 if (h != NULL)
1245 {
1246 bfd_boolean dyn =
1247 elf_hash_table (info)->dynamic_sections_created;
1248
1249 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1250 bfd_link_pic (info),
1251 h)
1252 && (!bfd_link_pic (info)
1253 || !SYMBOL_REFERENCES_LOCAL (info, h)))
1254 indx = h->dynindx;
1255 }
1256
1257 /* Need to generate relocs ? */
1258 if ((bfd_link_pic (info) || indx != 0)
1259 && (h == NULL
1260 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1261 || h->root.type != bfd_link_hash_undefweak))
1262 need_relocs = TRUE;
1263
1264 /* 2. Compute/Emit Static value of r-expression */
1265 static_value = relocation + addend;
1266
1267 /* 3. Process module-id and offset */
1268 if (! ((*offp) & 1) )
1269 {
1270 bfd_vma got_offset;
1271
1272 got_offset = (htab->elf.sgot->output_section->vma
1273 + htab->elf.sgot->output_offset
1274 + off);
1275
1276 /* Process module-id */
1277 if (IS_TLS_LD(tls_type))
1278 {
1279 if (! bfd_link_pic (info))
1280 bfd_put_32 (output_bfd, 1,
1281 htab->elf.sgot->contents + off);
1282 else
1283 microblaze_elf_output_dynamic_relocation
1284 (output_bfd,
1285 htab->elf.srelgot,
1286 htab->elf.srelgot->reloc_count++,
1287 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32,
1288 got_offset, 0);
1289 }
1290 else if (IS_TLS_GD(tls_type))
1291 {
1292 if (! need_relocs)
1293 bfd_put_32 (output_bfd, 1,
1294 htab->elf.sgot->contents + off);
1295 else
1296 microblaze_elf_output_dynamic_relocation
1297 (output_bfd,
1298 htab->elf.srelgot,
1299 htab->elf.srelgot->reloc_count++,
1300 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32,
1301 got_offset, indx ? 0 : static_value);
1302 }
1303
1304 /* Process Offset */
1305 if (htab->elf.srelgot == NULL)
1306 abort ();
1307
1308 got_offset = (htab->elf.sgot->output_section->vma
1309 + htab->elf.sgot->output_offset
1310 + off2);
1311 if (IS_TLS_LD(tls_type))
1312 {
1313 /* For LD, offset should be 0 */
1314 *offp |= 1;
1315 bfd_put_32 (output_bfd, 0,
1316 htab->elf.sgot->contents + off2);
1317 }
1318 else if (IS_TLS_GD(tls_type))
1319 {
1320 *offp |= 1;
1321 static_value -= dtprel_base(info);
1322 if (need_relocs)
1323 microblaze_elf_output_dynamic_relocation
1324 (output_bfd,
1325 htab->elf.srelgot,
1326 htab->elf.srelgot->reloc_count++,
1327 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32,
1328 got_offset, indx ? 0 : static_value);
1329 else
1330 bfd_put_32 (output_bfd, static_value,
1331 htab->elf.sgot->contents + off2);
1332 }
1333 else
1334 {
1335 bfd_put_32 (output_bfd, static_value,
1336 htab->elf.sgot->contents + off2);
1337
1338 /* Relocs for dyn symbols generated by
1339 finish_dynamic_symbols */
1340 if (bfd_link_pic (info) && h == NULL)
1341 {
1342 *offp |= 1;
1343 microblaze_elf_output_dynamic_relocation
1344 (output_bfd,
1345 htab->elf.srelgot,
1346 htab->elf.srelgot->reloc_count++,
1347 /* symindex= */ indx, R_MICROBLAZE_REL,
1348 got_offset, static_value);
1349 }
1350 }
1351 }
1352
1353 /* 4. Fixup Relocation with GOT offset value
1354 Compute relative address of GOT entry for applying
1355 the current relocation */
1356 relocation = htab->elf.sgot->output_section->vma
1357 + htab->elf.sgot->output_offset
1358 + off
1359 - htab->elf.sgotplt->output_section->vma
1360 - htab->elf.sgotplt->output_offset;
1361
1362 /* Apply Current Relocation */
1363 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1364 contents + offset + endian);
1365 bfd_put_16 (input_bfd, relocation & 0xffff,
1366 contents + offset + endian + INST_WORD_SIZE);
1367
1368 unresolved_reloc = FALSE;
1369 break;
1370 }
1371
1372 case (int) R_MICROBLAZE_GOTOFF_64:
1373 {
1374 bfd_vma immediate;
1375 unsigned short lo, high;
1376 relocation += addend;
1377 relocation -= (htab->elf.sgotplt->output_section->vma
1378 + htab->elf.sgotplt->output_offset);
1379 /* Write this value into correct location. */
1380 immediate = relocation;
1381 lo = immediate & 0x0000ffff;
1382 high = (immediate >> 16) & 0x0000ffff;
1383 bfd_put_16 (input_bfd, high, contents + offset + endian);
1384 bfd_put_16 (input_bfd, lo,
1385 contents + offset + INST_WORD_SIZE + endian);
1386 break;
1387 }
1388
1389 case (int) R_MICROBLAZE_GOTOFF_32:
1390 {
1391 relocation += addend;
1392 relocation -= (htab->elf.sgotplt->output_section->vma
1393 + htab->elf.sgotplt->output_offset);
1394 /* Write this value into correct location. */
1395 bfd_put_32 (input_bfd, relocation, contents + offset);
1396 break;
1397 }
1398
1399 case (int) R_MICROBLAZE_TLSDTPREL64:
1400 relocation += addend;
1401 relocation -= dtprel_base(info);
1402 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1403 contents + offset + 2);
1404 bfd_put_16 (input_bfd, relocation & 0xffff,
1405 contents + offset + 2 + INST_WORD_SIZE);
1406 break;
1407 case (int) R_MICROBLAZE_64_PCREL :
1408 case (int) R_MICROBLAZE_64:
1409 case (int) R_MICROBLAZE_32:
1410 {
1411 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1412 from removed linkonce sections, or sections discarded by
1413 a linker script. */
1414 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0)
1415 {
1416 relocation += addend;
1417 if (r_type == R_MICROBLAZE_32)
1418 bfd_put_32 (input_bfd, relocation, contents + offset);
1419 else
1420 {
1421 if (r_type == R_MICROBLAZE_64_PCREL)
1422 relocation -= (input_section->output_section->vma
1423 + input_section->output_offset
1424 + offset + INST_WORD_SIZE);
1425 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1426 contents + offset + endian);
1427 bfd_put_16 (input_bfd, relocation & 0xffff,
1428 contents + offset + endian + INST_WORD_SIZE);
1429 }
1430 break;
1431 }
1432
1433 if ((bfd_link_pic (info)
1434 && (h == NULL
1435 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1436 || h->root.type != bfd_link_hash_undefweak)
1437 && (!howto->pc_relative
1438 || (h != NULL
1439 && h->dynindx != -1
1440 && (!info->symbolic
1441 || !h->def_regular))))
1442 || (!bfd_link_pic (info)
1443 && h != NULL
1444 && h->dynindx != -1
1445 && !h->non_got_ref
1446 && ((h->def_dynamic
1447 && !h->def_regular)
1448 || h->root.type == bfd_link_hash_undefweak
1449 || h->root.type == bfd_link_hash_undefined)))
1450 {
1451 Elf_Internal_Rela outrel;
1452 bfd_byte *loc;
1453 bfd_boolean skip;
1454
1455 /* When generating a shared object, these relocations
1456 are copied into the output file to be resolved at run
1457 time. */
1458
1459 BFD_ASSERT (sreloc != NULL);
1460
1461 skip = FALSE;
1462
1463 outrel.r_offset =
1464 _bfd_elf_section_offset (output_bfd, info, input_section,
1465 rel->r_offset);
1466 if (outrel.r_offset == (bfd_vma) -1)
1467 skip = TRUE;
1468 else if (outrel.r_offset == (bfd_vma) -2)
1469 skip = TRUE;
1470 outrel.r_offset += (input_section->output_section->vma
1471 + input_section->output_offset);
1472
1473 if (skip)
1474 memset (&outrel, 0, sizeof outrel);
1475 /* h->dynindx may be -1 if the symbol was marked to
1476 become local. */
1477 else if (h != NULL
1478 && ((! info->symbolic && h->dynindx != -1)
1479 || !h->def_regular))
1480 {
1481 BFD_ASSERT (h->dynindx != -1);
1482 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1483 outrel.r_addend = addend;
1484 }
1485 else
1486 {
1487 if (r_type == R_MICROBLAZE_32)
1488 {
1489 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
1490 outrel.r_addend = relocation + addend;
1491 }
1492 else
1493 {
1494 BFD_FAIL ();
1495 _bfd_error_handler
1496 (_("%B: probably compiled without -fPIC?"),
1497 input_bfd);
1498 bfd_set_error (bfd_error_bad_value);
1499 return FALSE;
1500 }
1501 }
1502
1503 loc = sreloc->contents;
1504 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1505 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1506 break;
1507 }
1508 else
1509 {
1510 relocation += addend;
1511 if (r_type == R_MICROBLAZE_32)
1512 bfd_put_32 (input_bfd, relocation, contents + offset);
1513 else
1514 {
1515 if (r_type == R_MICROBLAZE_64_PCREL)
1516 relocation -= (input_section->output_section->vma
1517 + input_section->output_offset
1518 + offset + INST_WORD_SIZE);
1519 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1520 contents + offset + endian);
1521 bfd_put_16 (input_bfd, relocation & 0xffff,
1522 contents + offset + endian + INST_WORD_SIZE);
1523 }
1524 break;
1525 }
1526 }
1527
1528 default :
1529 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1530 contents, offset,
1531 relocation, addend);
1532 break;
1533 }
1534 }
1535
1536 check_reloc:
1537
1538 if (r != bfd_reloc_ok)
1539 {
1540 /* FIXME: This should be generic enough to go in a utility. */
1541 const char *name;
1542
1543 if (h != NULL)
1544 name = h->root.root.string;
1545 else
1546 {
1547 name = (bfd_elf_string_from_elf_section
1548 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1549 if (name == NULL || *name == '\0')
1550 name = bfd_section_name (input_bfd, sec);
1551 }
1552
1553 if (errmsg != NULL)
1554 goto common_error;
1555
1556 switch (r)
1557 {
1558 case bfd_reloc_overflow:
1559 (*info->callbacks->reloc_overflow)
1560 (info, (h ? &h->root : NULL), name, howto->name,
1561 (bfd_vma) 0, input_bfd, input_section, offset);
1562 break;
1563
1564 case bfd_reloc_undefined:
1565 (*info->callbacks->undefined_symbol)
1566 (info, name, input_bfd, input_section, offset, TRUE);
1567 break;
1568
1569 case bfd_reloc_outofrange:
1570 errmsg = _("internal error: out of range error");
1571 goto common_error;
1572
1573 case bfd_reloc_notsupported:
1574 errmsg = _("internal error: unsupported relocation error");
1575 goto common_error;
1576
1577 case bfd_reloc_dangerous:
1578 errmsg = _("internal error: dangerous error");
1579 goto common_error;
1580
1581 default:
1582 errmsg = _("internal error: unknown error");
1583 /* Fall through. */
1584 common_error:
1585 (*info->callbacks->warning) (info, errmsg, name, input_bfd,
1586 input_section, offset);
1587 break;
1588 }
1589 }
1590 }
1591
1592 return ret;
1593 }
1594 \f
1595 /* Calculate fixup value for reference. */
1596
1597 static int
1598 calc_fixup (bfd_vma start, bfd_vma size, asection *sec)
1599 {
1600 bfd_vma end = start + size;
1601 int i, fixup = 0;
1602
1603 if (sec == NULL || sec->relax == NULL)
1604 return 0;
1605
1606 /* Look for addr in relax table, total fixup value. */
1607 for (i = 0; i < sec->relax_count; i++)
1608 {
1609 if (end <= sec->relax[i].addr)
1610 break;
1611 if ((end != start) && (start > sec->relax[i].addr))
1612 continue;
1613 fixup += sec->relax[i].size;
1614 }
1615 return fixup;
1616 }
1617
1618 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1619 a 32-bit instruction. */
1620 static void
1621 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1622 {
1623 unsigned long instr = bfd_get_32 (abfd, bfd_addr);
1624 instr &= ~0x0000ffff;
1625 instr |= (val & 0x0000ffff);
1626 bfd_put_32 (abfd, instr, bfd_addr);
1627 }
1628
1629 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1630 two consecutive 32-bit instructions. */
1631 static void
1632 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1633 {
1634 unsigned long instr_hi;
1635 unsigned long instr_lo;
1636
1637 instr_hi = bfd_get_32 (abfd, bfd_addr);
1638 instr_hi &= ~0x0000ffff;
1639 instr_hi |= ((val >> 16) & 0x0000ffff);
1640 bfd_put_32 (abfd, instr_hi, bfd_addr);
1641
1642 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE);
1643 instr_lo &= ~0x0000ffff;
1644 instr_lo |= (val & 0x0000ffff);
1645 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE);
1646 }
1647
1648 static bfd_boolean
1649 microblaze_elf_relax_section (bfd *abfd,
1650 asection *sec,
1651 struct bfd_link_info *link_info,
1652 bfd_boolean *again)
1653 {
1654 Elf_Internal_Shdr *symtab_hdr;
1655 Elf_Internal_Rela *internal_relocs;
1656 Elf_Internal_Rela *free_relocs = NULL;
1657 Elf_Internal_Rela *irel, *irelend;
1658 bfd_byte *contents = NULL;
1659 bfd_byte *free_contents = NULL;
1660 int rel_count;
1661 unsigned int shndx;
1662 int i, sym_index;
1663 asection *o;
1664 struct elf_link_hash_entry *sym_hash;
1665 Elf_Internal_Sym *isymbuf, *isymend;
1666 Elf_Internal_Sym *isym;
1667 int symcount;
1668 int offset;
1669 bfd_vma src, dest;
1670
1671 /* We only do this once per section. We may be able to delete some code
1672 by running multiple passes, but it is not worth it. */
1673 *again = FALSE;
1674
1675 /* Only do this for a text section. */
1676 if (bfd_link_relocatable (link_info)
1677 || (sec->flags & SEC_RELOC) == 0
1678 || (sec->reloc_count == 0)
1679 || (sec->flags & SEC_CODE) == 0)
1680 return TRUE;
1681
1682 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
1683
1684 /* If this is the first time we have been called for this section,
1685 initialize the cooked size. */
1686 if (sec->size == 0)
1687 sec->size = sec->rawsize;
1688
1689 /* Get symbols for this section. */
1690 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1691 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1692 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
1693 if (isymbuf == NULL)
1694 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
1695 0, NULL, NULL, NULL);
1696 BFD_ASSERT (isymbuf != NULL);
1697
1698 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1699 if (internal_relocs == NULL)
1700 goto error_return;
1701 if (! link_info->keep_memory)
1702 free_relocs = internal_relocs;
1703
1704 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
1705 * sizeof (struct relax_table));
1706 if (sec->relax == NULL)
1707 goto error_return;
1708 sec->relax_count = 0;
1709
1710 irelend = internal_relocs + sec->reloc_count;
1711 rel_count = 0;
1712 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1713 {
1714 bfd_vma symval;
1715 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
1716 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 ))
1717 continue; /* Can't delete this reloc. */
1718
1719 /* Get the section contents. */
1720 if (contents == NULL)
1721 {
1722 if (elf_section_data (sec)->this_hdr.contents != NULL)
1723 contents = elf_section_data (sec)->this_hdr.contents;
1724 else
1725 {
1726 contents = (bfd_byte *) bfd_malloc (sec->size);
1727 if (contents == NULL)
1728 goto error_return;
1729 free_contents = contents;
1730
1731 if (!bfd_get_section_contents (abfd, sec, contents,
1732 (file_ptr) 0, sec->size))
1733 goto error_return;
1734 elf_section_data (sec)->this_hdr.contents = contents;
1735 }
1736 }
1737
1738 /* Get the value of the symbol referred to by the reloc. */
1739 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1740 {
1741 /* A local symbol. */
1742 asection *sym_sec;
1743
1744 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1745 if (isym->st_shndx == SHN_UNDEF)
1746 sym_sec = bfd_und_section_ptr;
1747 else if (isym->st_shndx == SHN_ABS)
1748 sym_sec = bfd_abs_section_ptr;
1749 else if (isym->st_shndx == SHN_COMMON)
1750 sym_sec = bfd_com_section_ptr;
1751 else
1752 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1753
1754 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
1755 }
1756 else
1757 {
1758 unsigned long indx;
1759 struct elf_link_hash_entry *h;
1760
1761 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1762 h = elf_sym_hashes (abfd)[indx];
1763 BFD_ASSERT (h != NULL);
1764
1765 if (h->root.type != bfd_link_hash_defined
1766 && h->root.type != bfd_link_hash_defweak)
1767 /* This appears to be a reference to an undefined
1768 symbol. Just ignore it--it will be caught by the
1769 regular reloc processing. */
1770 continue;
1771
1772 symval = (h->root.u.def.value
1773 + h->root.u.def.section->output_section->vma
1774 + h->root.u.def.section->output_offset);
1775 }
1776
1777 /* If this is a PC-relative reloc, subtract the instr offset from
1778 the symbol value. */
1779 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
1780 {
1781 symval = symval + irel->r_addend
1782 - (irel->r_offset
1783 + sec->output_section->vma
1784 + sec->output_offset);
1785 }
1786 else
1787 symval += irel->r_addend;
1788
1789 if ((symval & 0xffff8000) == 0
1790 || (symval & 0xffff8000) == 0xffff8000)
1791 {
1792 /* We can delete this instruction. */
1793 sec->relax[sec->relax_count].addr = irel->r_offset;
1794 sec->relax[sec->relax_count].size = INST_WORD_SIZE;
1795 sec->relax_count++;
1796
1797 /* Rewrite relocation type. */
1798 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1799 {
1800 case R_MICROBLAZE_64_PCREL:
1801 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1802 (int) R_MICROBLAZE_32_PCREL_LO);
1803 break;
1804 case R_MICROBLAZE_64:
1805 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1806 (int) R_MICROBLAZE_32_LO);
1807 break;
1808 default:
1809 /* Cannot happen. */
1810 BFD_ASSERT (FALSE);
1811 }
1812 }
1813 } /* Loop through all relocations. */
1814
1815 /* Loop through the relocs again, and see if anything needs to change. */
1816 if (sec->relax_count > 0)
1817 {
1818 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1819 rel_count = 0;
1820 sec->relax[sec->relax_count].addr = sec->size;
1821
1822 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1823 {
1824 bfd_vma nraddr;
1825
1826 /* Get the new reloc address. */
1827 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec);
1828 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1829 {
1830 default:
1831 break;
1832 case R_MICROBLAZE_64_PCREL:
1833 break;
1834 case R_MICROBLAZE_64:
1835 case R_MICROBLAZE_32_LO:
1836 /* If this reloc is against a symbol defined in this
1837 section, we must check the addend to see it will put the value in
1838 range to be adjusted, and hence must be changed. */
1839 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1840 {
1841 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1842 /* Only handle relocs against .text. */
1843 if (isym->st_shndx == shndx
1844 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
1845 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec);
1846 }
1847 break;
1848 case R_MICROBLAZE_NONE:
1849 {
1850 /* This was a PC-relative instruction that was
1851 completely resolved. */
1852 int sfix, efix;
1853 bfd_vma target_address;
1854 target_address = irel->r_addend + irel->r_offset;
1855 sfix = calc_fixup (irel->r_offset, 0, sec);
1856 efix = calc_fixup (target_address, 0, sec);
1857 irel->r_addend -= (efix - sfix);
1858 /* Should use HOWTO. */
1859 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset,
1860 irel->r_addend);
1861 }
1862 break;
1863 case R_MICROBLAZE_64_NONE:
1864 {
1865 /* This was a PC-relative 64-bit instruction that was
1866 completely resolved. */
1867 int sfix, efix;
1868 bfd_vma target_address;
1869 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
1870 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec);
1871 efix = calc_fixup (target_address, 0, sec);
1872 irel->r_addend -= (efix - sfix);
1873 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset
1874 + INST_WORD_SIZE, irel->r_addend);
1875 }
1876 break;
1877 }
1878 irel->r_offset = nraddr;
1879 } /* Change all relocs in this section. */
1880
1881 /* Look through all other sections. */
1882 for (o = abfd->sections; o != NULL; o = o->next)
1883 {
1884 Elf_Internal_Rela *irelocs;
1885 Elf_Internal_Rela *irelscan, *irelscanend;
1886 bfd_byte *ocontents;
1887
1888 if (o == sec
1889 || (o->flags & SEC_RELOC) == 0
1890 || o->reloc_count == 0)
1891 continue;
1892
1893 /* We always cache the relocs. Perhaps, if info->keep_memory is
1894 FALSE, we should free them, if we are permitted to. */
1895
1896 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
1897 if (irelocs == NULL)
1898 goto error_return;
1899
1900 ocontents = NULL;
1901 irelscanend = irelocs + o->reloc_count;
1902 for (irelscan = irelocs; irelscan < irelscanend; irelscan++)
1903 {
1904 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
1905 {
1906 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1907
1908 /* Look at the reloc only if the value has been resolved. */
1909 if (isym->st_shndx == shndx
1910 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1911 {
1912 if (ocontents == NULL)
1913 {
1914 if (elf_section_data (o)->this_hdr.contents != NULL)
1915 ocontents = elf_section_data (o)->this_hdr.contents;
1916 else
1917 {
1918 /* We always cache the section contents.
1919 Perhaps, if info->keep_memory is FALSE, we
1920 should free them, if we are permitted to. */
1921 if (o->rawsize == 0)
1922 o->rawsize = o->size;
1923 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1924 if (ocontents == NULL)
1925 goto error_return;
1926 if (!bfd_get_section_contents (abfd, o, ocontents,
1927 (file_ptr) 0,
1928 o->rawsize))
1929 goto error_return;
1930 elf_section_data (o)->this_hdr.contents = ocontents;
1931 }
1932
1933 }
1934 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec);
1935 }
1936 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
1937 {
1938 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1939
1940 /* Look at the reloc only if the value has been resolved. */
1941 if (ocontents == NULL)
1942 {
1943 if (elf_section_data (o)->this_hdr.contents != NULL)
1944 ocontents = elf_section_data (o)->this_hdr.contents;
1945 else
1946 {
1947 /* We always cache the section contents.
1948 Perhaps, if info->keep_memory is FALSE, we
1949 should free them, if we are permitted to. */
1950
1951 if (o->rawsize == 0)
1952 o->rawsize = o->size;
1953 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1954 if (ocontents == NULL)
1955 goto error_return;
1956 if (!bfd_get_section_contents (abfd, o, ocontents,
1957 (file_ptr) 0,
1958 o->rawsize))
1959 goto error_return;
1960 elf_section_data (o)->this_hdr.contents = ocontents;
1961 }
1962 }
1963 irelscan->r_addend -= calc_fixup (irel->r_addend
1964 + isym->st_value,
1965 0,
1966 sec);
1967 }
1968 }
1969 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
1970 || (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO))
1971 {
1972 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1973
1974 /* Look at the reloc only if the value has been resolved. */
1975 if (isym->st_shndx == shndx
1976 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1977 {
1978 bfd_vma immediate;
1979 bfd_vma target_address;
1980
1981 if (ocontents == NULL)
1982 {
1983 if (elf_section_data (o)->this_hdr.contents != NULL)
1984 ocontents = elf_section_data (o)->this_hdr.contents;
1985 else
1986 {
1987 /* We always cache the section contents.
1988 Perhaps, if info->keep_memory is FALSE, we
1989 should free them, if we are permitted to. */
1990 if (o->rawsize == 0)
1991 o->rawsize = o->size;
1992 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1993 if (ocontents == NULL)
1994 goto error_return;
1995 if (!bfd_get_section_contents (abfd, o, ocontents,
1996 (file_ptr) 0,
1997 o->rawsize))
1998 goto error_return;
1999 elf_section_data (o)->this_hdr.contents = ocontents;
2000 }
2001 }
2002
2003 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
2004 immediate = instr & 0x0000ffff;
2005 target_address = immediate;
2006 offset = calc_fixup (target_address, 0, sec);
2007 immediate -= offset;
2008 irelscan->r_addend -= offset;
2009 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset,
2010 irelscan->r_addend);
2011 }
2012 }
2013
2014 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64)
2015 {
2016 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2017
2018 /* Look at the reloc only if the value has been resolved. */
2019 if (isym->st_shndx == shndx
2020 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2021 {
2022 bfd_vma immediate;
2023
2024 if (ocontents == NULL)
2025 {
2026 if (elf_section_data (o)->this_hdr.contents != NULL)
2027 ocontents = elf_section_data (o)->this_hdr.contents;
2028 else
2029 {
2030 /* We always cache the section contents.
2031 Perhaps, if info->keep_memory is FALSE, we
2032 should free them, if we are permitted to. */
2033
2034 if (o->rawsize == 0)
2035 o->rawsize = o->size;
2036 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2037 if (ocontents == NULL)
2038 goto error_return;
2039 if (!bfd_get_section_contents (abfd, o, ocontents,
2040 (file_ptr) 0,
2041 o->rawsize))
2042 goto error_return;
2043 elf_section_data (o)->this_hdr.contents = ocontents;
2044 }
2045 }
2046 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2047 + irelscan->r_offset);
2048 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2049 + irelscan->r_offset
2050 + INST_WORD_SIZE);
2051 immediate = (instr_hi & 0x0000ffff) << 16;
2052 immediate |= (instr_lo & 0x0000ffff);
2053 offset = calc_fixup (irelscan->r_addend, 0, sec);
2054 immediate -= offset;
2055 irelscan->r_addend -= offset;
2056 }
2057 }
2058 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
2059 {
2060 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2061
2062 /* Look at the reloc only if the value has been resolved. */
2063 if (isym->st_shndx == shndx
2064 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2065 {
2066 bfd_vma immediate;
2067 bfd_vma target_address;
2068
2069 if (ocontents == NULL)
2070 {
2071 if (elf_section_data (o)->this_hdr.contents != NULL)
2072 ocontents = elf_section_data (o)->this_hdr.contents;
2073 else
2074 {
2075 /* We always cache the section contents.
2076 Perhaps, if info->keep_memory is FALSE, we
2077 should free them, if we are permitted to. */
2078 if (o->rawsize == 0)
2079 o->rawsize = o->size;
2080 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2081 if (ocontents == NULL)
2082 goto error_return;
2083 if (!bfd_get_section_contents (abfd, o, ocontents,
2084 (file_ptr) 0,
2085 o->rawsize))
2086 goto error_return;
2087 elf_section_data (o)->this_hdr.contents = ocontents;
2088 }
2089 }
2090 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2091 + irelscan->r_offset);
2092 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2093 + irelscan->r_offset
2094 + INST_WORD_SIZE);
2095 immediate = (instr_hi & 0x0000ffff) << 16;
2096 immediate |= (instr_lo & 0x0000ffff);
2097 target_address = immediate;
2098 offset = calc_fixup (target_address, 0, sec);
2099 immediate -= offset;
2100 irelscan->r_addend -= offset;
2101 microblaze_bfd_write_imm_value_64 (abfd, ocontents
2102 + irelscan->r_offset, immediate);
2103 }
2104 }
2105 }
2106 }
2107
2108 /* Adjust the local symbols defined in this section. */
2109 isymend = isymbuf + symtab_hdr->sh_info;
2110 for (isym = isymbuf; isym < isymend; isym++)
2111 {
2112 if (isym->st_shndx == shndx)
2113 {
2114 isym->st_value -= calc_fixup (isym->st_value, 0, sec);
2115 if (isym->st_size)
2116 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec);
2117 }
2118 }
2119
2120 /* Now adjust the global symbols defined in this section. */
2121 isym = isymbuf + symtab_hdr->sh_info;
2122 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info;
2123 for (sym_index = 0; sym_index < symcount; sym_index++)
2124 {
2125 sym_hash = elf_sym_hashes (abfd)[sym_index];
2126 if ((sym_hash->root.type == bfd_link_hash_defined
2127 || sym_hash->root.type == bfd_link_hash_defweak)
2128 && sym_hash->root.u.def.section == sec)
2129 {
2130 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
2131 0, sec);
2132 if (sym_hash->size)
2133 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value,
2134 sym_hash->size, sec);
2135 }
2136 }
2137
2138 /* Physically move the code and change the cooked size. */
2139 dest = sec->relax[0].addr;
2140 for (i = 0; i < sec->relax_count; i++)
2141 {
2142 int len;
2143 src = sec->relax[i].addr + sec->relax[i].size;
2144 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
2145
2146 memmove (contents + dest, contents + src, len);
2147 sec->size -= sec->relax[i].size;
2148 dest += len;
2149 }
2150
2151 elf_section_data (sec)->relocs = internal_relocs;
2152 free_relocs = NULL;
2153
2154 elf_section_data (sec)->this_hdr.contents = contents;
2155 free_contents = NULL;
2156
2157 symtab_hdr->contents = (bfd_byte *) isymbuf;
2158 }
2159
2160 if (free_relocs != NULL)
2161 {
2162 free (free_relocs);
2163 free_relocs = NULL;
2164 }
2165
2166 if (free_contents != NULL)
2167 {
2168 if (!link_info->keep_memory)
2169 free (free_contents);
2170 else
2171 /* Cache the section contents for elf_link_input_bfd. */
2172 elf_section_data (sec)->this_hdr.contents = contents;
2173 free_contents = NULL;
2174 }
2175
2176 if (sec->relax_count == 0)
2177 {
2178 *again = FALSE;
2179 free (sec->relax);
2180 sec->relax = NULL;
2181 }
2182 else
2183 *again = TRUE;
2184 return TRUE;
2185
2186 error_return:
2187 if (free_relocs != NULL)
2188 free (free_relocs);
2189 if (free_contents != NULL)
2190 free (free_contents);
2191 if (sec->relax != NULL)
2192 {
2193 free (sec->relax);
2194 sec->relax = NULL;
2195 sec->relax_count = 0;
2196 }
2197 return FALSE;
2198 }
2199
2200 /* Return the section that should be marked against GC for a given
2201 relocation. */
2202
2203 static asection *
2204 microblaze_elf_gc_mark_hook (asection *sec,
2205 struct bfd_link_info * info,
2206 Elf_Internal_Rela * rel,
2207 struct elf_link_hash_entry * h,
2208 Elf_Internal_Sym * sym)
2209 {
2210 if (h != NULL)
2211 switch (ELF32_R_TYPE (rel->r_info))
2212 {
2213 case R_MICROBLAZE_GNU_VTINHERIT:
2214 case R_MICROBLAZE_GNU_VTENTRY:
2215 return NULL;
2216 }
2217
2218 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2219 }
2220
2221 /* Update the got entry reference counts for the section being removed. */
2222
2223 static bfd_boolean
2224 microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
2225 struct bfd_link_info * info ATTRIBUTE_UNUSED,
2226 asection * sec ATTRIBUTE_UNUSED,
2227 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
2228 {
2229 return TRUE;
2230 }
2231
2232 /* PIC support. */
2233
2234 #define PLT_ENTRY_SIZE 16
2235
2236 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2237 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2238 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2239 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2240 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2241
2242 static bfd_boolean
2243 update_local_sym_info (bfd *abfd,
2244 Elf_Internal_Shdr *symtab_hdr,
2245 unsigned long r_symndx,
2246 unsigned int tls_type)
2247 {
2248 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2249 unsigned char *local_got_tls_masks;
2250
2251 if (local_got_refcounts == NULL)
2252 {
2253 bfd_size_type size = symtab_hdr->sh_info;
2254
2255 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks));
2256 local_got_refcounts = bfd_zalloc (abfd, size);
2257 if (local_got_refcounts == NULL)
2258 return FALSE;
2259 elf_local_got_refcounts (abfd) = local_got_refcounts;
2260 }
2261
2262 local_got_tls_masks =
2263 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info);
2264 local_got_tls_masks[r_symndx] |= tls_type;
2265 local_got_refcounts[r_symndx] += 1;
2266
2267 return TRUE;
2268 }
2269 /* Look through the relocs for a section during the first phase. */
2270
2271 static bfd_boolean
2272 microblaze_elf_check_relocs (bfd * abfd,
2273 struct bfd_link_info * info,
2274 asection * sec,
2275 const Elf_Internal_Rela * relocs)
2276 {
2277 Elf_Internal_Shdr * symtab_hdr;
2278 struct elf_link_hash_entry ** sym_hashes;
2279 struct elf_link_hash_entry ** sym_hashes_end;
2280 const Elf_Internal_Rela * rel;
2281 const Elf_Internal_Rela * rel_end;
2282 struct elf32_mb_link_hash_table *htab;
2283 asection *sreloc = NULL;
2284
2285 if (bfd_link_relocatable (info))
2286 return TRUE;
2287
2288 htab = elf32_mb_hash_table (info);
2289 if (htab == NULL)
2290 return FALSE;
2291
2292 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2293 sym_hashes = elf_sym_hashes (abfd);
2294 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2295 if (!elf_bad_symtab (abfd))
2296 sym_hashes_end -= symtab_hdr->sh_info;
2297
2298 rel_end = relocs + sec->reloc_count;
2299
2300 for (rel = relocs; rel < rel_end; rel++)
2301 {
2302 unsigned int r_type;
2303 struct elf_link_hash_entry * h;
2304 unsigned long r_symndx;
2305 unsigned char tls_type = 0;
2306
2307 r_symndx = ELF32_R_SYM (rel->r_info);
2308 r_type = ELF32_R_TYPE (rel->r_info);
2309
2310 if (r_symndx < symtab_hdr->sh_info)
2311 h = NULL;
2312 else
2313 {
2314 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2315
2316 /* PR15323, ref flags aren't set for references in the same
2317 object. */
2318 h->root.non_ir_ref_regular = 1;
2319 }
2320
2321 switch (r_type)
2322 {
2323 /* This relocation describes the C++ object vtable hierarchy.
2324 Reconstruct it for later use during GC. */
2325 case R_MICROBLAZE_GNU_VTINHERIT:
2326 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2327 return FALSE;
2328 break;
2329
2330 /* This relocation describes which C++ vtable entries are actually
2331 used. Record for later use during GC. */
2332 case R_MICROBLAZE_GNU_VTENTRY:
2333 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2334 return FALSE;
2335 break;
2336
2337 /* This relocation requires .plt entry. */
2338 case R_MICROBLAZE_PLT_64:
2339 if (h != NULL)
2340 {
2341 h->needs_plt = 1;
2342 h->plt.refcount += 1;
2343 }
2344 break;
2345
2346 /* This relocation requires .got entry. */
2347 case R_MICROBLAZE_TLSGD:
2348 tls_type |= (TLS_TLS | TLS_GD);
2349 goto dogottls;
2350 case R_MICROBLAZE_TLSLD:
2351 tls_type |= (TLS_TLS | TLS_LD);
2352 /* Fall through. */
2353 dogottls:
2354 sec->has_tls_reloc = 1;
2355 /* Fall through. */
2356 case R_MICROBLAZE_GOT_64:
2357 if (htab->elf.sgot == NULL)
2358 {
2359 if (htab->elf.dynobj == NULL)
2360 htab->elf.dynobj = abfd;
2361 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
2362 return FALSE;
2363 }
2364 if (h != NULL)
2365 {
2366 h->got.refcount += 1;
2367 elf32_mb_hash_entry (h)->tls_mask |= tls_type;
2368 }
2369 else
2370 {
2371 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) )
2372 return FALSE;
2373 }
2374 break;
2375
2376 case R_MICROBLAZE_GOTOFF_64:
2377 case R_MICROBLAZE_GOTOFF_32:
2378 if (htab->elf.sgot == NULL)
2379 {
2380 if (htab->elf.dynobj == NULL)
2381 htab->elf.dynobj = abfd;
2382 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
2383 return FALSE;
2384 }
2385 break;
2386
2387 case R_MICROBLAZE_64:
2388 case R_MICROBLAZE_64_PCREL:
2389 case R_MICROBLAZE_32:
2390 {
2391 if (h != NULL && !bfd_link_pic (info))
2392 {
2393 /* we may need a copy reloc. */
2394 h->non_got_ref = 1;
2395
2396 /* we may also need a .plt entry. */
2397 h->plt.refcount += 1;
2398 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
2399 h->pointer_equality_needed = 1;
2400 }
2401
2402
2403 /* If we are creating a shared library, and this is a reloc
2404 against a global symbol, or a non PC relative reloc
2405 against a local symbol, then we need to copy the reloc
2406 into the shared library. However, if we are linking with
2407 -Bsymbolic, we do not need to copy a reloc against a
2408 global symbol which is defined in an object we are
2409 including in the link (i.e., DEF_REGULAR is set). At
2410 this point we have not seen all the input files, so it is
2411 possible that DEF_REGULAR is not set now but will be set
2412 later (it is never cleared). In case of a weak definition,
2413 DEF_REGULAR may be cleared later by a strong definition in
2414 a shared library. We account for that possibility below by
2415 storing information in the relocs_copied field of the hash
2416 table entry. A similar situation occurs when creating
2417 shared libraries and symbol visibility changes render the
2418 symbol local.
2419
2420 If on the other hand, we are creating an executable, we
2421 may need to keep relocations for symbols satisfied by a
2422 dynamic library if we manage to avoid copy relocs for the
2423 symbol. */
2424
2425 if ((bfd_link_pic (info)
2426 && (sec->flags & SEC_ALLOC) != 0
2427 && (r_type != R_MICROBLAZE_64_PCREL
2428 || (h != NULL
2429 && (! info->symbolic
2430 || h->root.type == bfd_link_hash_defweak
2431 || !h->def_regular))))
2432 || (!bfd_link_pic (info)
2433 && (sec->flags & SEC_ALLOC) != 0
2434 && h != NULL
2435 && (h->root.type == bfd_link_hash_defweak
2436 || !h->def_regular)))
2437 {
2438 struct elf32_mb_dyn_relocs *p;
2439 struct elf32_mb_dyn_relocs **head;
2440
2441 /* When creating a shared object, we must copy these
2442 relocs into the output file. We create a reloc
2443 section in dynobj and make room for the reloc. */
2444
2445 if (sreloc == NULL)
2446 {
2447 bfd *dynobj;
2448
2449 if (htab->elf.dynobj == NULL)
2450 htab->elf.dynobj = abfd;
2451 dynobj = htab->elf.dynobj;
2452
2453 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj,
2454 2, abfd, 1);
2455 if (sreloc == NULL)
2456 return FALSE;
2457 }
2458
2459 /* If this is a global symbol, we count the number of
2460 relocations we need for this symbol. */
2461 if (h != NULL)
2462 head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs;
2463 else
2464 {
2465 /* Track dynamic relocs needed for local syms too.
2466 We really need local syms available to do this
2467 easily. Oh well. */
2468
2469 asection *s;
2470 Elf_Internal_Sym *isym;
2471 void *vpp;
2472
2473 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
2474 abfd, r_symndx);
2475 if (isym == NULL)
2476 return FALSE;
2477
2478 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2479 if (s == NULL)
2480 return FALSE;
2481
2482 vpp = &elf_section_data (s)->local_dynrel;
2483 head = (struct elf32_mb_dyn_relocs **) vpp;
2484 }
2485
2486 p = *head;
2487 if (p == NULL || p->sec != sec)
2488 {
2489 bfd_size_type amt = sizeof *p;
2490 p = ((struct elf32_mb_dyn_relocs *)
2491 bfd_alloc (htab->elf.dynobj, amt));
2492 if (p == NULL)
2493 return FALSE;
2494 p->next = *head;
2495 *head = p;
2496 p->sec = sec;
2497 p->count = 0;
2498 p->pc_count = 0;
2499 }
2500
2501 p->count += 1;
2502 if (r_type == R_MICROBLAZE_64_PCREL)
2503 p->pc_count += 1;
2504 }
2505 }
2506 break;
2507 }
2508 }
2509
2510 return TRUE;
2511 }
2512
2513 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2514
2515 static void
2516 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
2517 struct elf_link_hash_entry *dir,
2518 struct elf_link_hash_entry *ind)
2519 {
2520 struct elf32_mb_link_hash_entry *edir, *eind;
2521
2522 edir = (struct elf32_mb_link_hash_entry *) dir;
2523 eind = (struct elf32_mb_link_hash_entry *) ind;
2524
2525 if (eind->dyn_relocs != NULL)
2526 {
2527 if (edir->dyn_relocs != NULL)
2528 {
2529 struct elf32_mb_dyn_relocs **pp;
2530 struct elf32_mb_dyn_relocs *p;
2531
2532 if (ind->root.type == bfd_link_hash_indirect)
2533 abort ();
2534
2535 /* Add reloc counts against the weak sym to the strong sym
2536 list. Merge any entries against the same section. */
2537 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2538 {
2539 struct elf32_mb_dyn_relocs *q;
2540
2541 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2542 if (q->sec == p->sec)
2543 {
2544 q->pc_count += p->pc_count;
2545 q->count += p->count;
2546 *pp = p->next;
2547 break;
2548 }
2549 if (q == NULL)
2550 pp = &p->next;
2551 }
2552 *pp = edir->dyn_relocs;
2553 }
2554
2555 edir->dyn_relocs = eind->dyn_relocs;
2556 eind->dyn_relocs = NULL;
2557 }
2558
2559 edir->tls_mask |= eind->tls_mask;
2560
2561 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2562 }
2563
2564 static bfd_boolean
2565 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2566 struct elf_link_hash_entry *h)
2567 {
2568 struct elf32_mb_link_hash_table *htab;
2569 struct elf32_mb_link_hash_entry * eh;
2570 struct elf32_mb_dyn_relocs *p;
2571 asection *s, *srel;
2572 unsigned int power_of_two;
2573
2574 htab = elf32_mb_hash_table (info);
2575 if (htab == NULL)
2576 return FALSE;
2577
2578 /* If this is a function, put it in the procedure linkage table. We
2579 will fill in the contents of the procedure linkage table later,
2580 when we know the address of the .got section. */
2581 if (h->type == STT_FUNC
2582 || h->needs_plt)
2583 {
2584 if (h->plt.refcount <= 0
2585 || SYMBOL_CALLS_LOCAL (info, h)
2586 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2587 && h->root.type == bfd_link_hash_undefweak))
2588 {
2589 /* This case can occur if we saw a PLT reloc in an input
2590 file, but the symbol was never referred to by a dynamic
2591 object, or if all references were garbage collected. In
2592 such a case, we don't actually need to build a procedure
2593 linkage table, and we can just do a PC32 reloc instead. */
2594 h->plt.offset = (bfd_vma) -1;
2595 h->needs_plt = 0;
2596 }
2597
2598 return TRUE;
2599 }
2600 else
2601 /* It's possible that we incorrectly decided a .plt reloc was
2602 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2603 check_relocs. We can't decide accurately between function and
2604 non-function syms in check-relocs; Objects loaded later in
2605 the link may change h->type. So fix it now. */
2606 h->plt.offset = (bfd_vma) -1;
2607
2608 /* If this is a weak symbol, and there is a real definition, the
2609 processor independent code will have arranged for us to see the
2610 real definition first, and we can just use the same value. */
2611 if (h->u.weakdef != NULL)
2612 {
2613 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2614 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2615 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2616 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2617 return TRUE;
2618 }
2619
2620 /* This is a reference to a symbol defined by a dynamic object which
2621 is not a function. */
2622
2623 /* If we are creating a shared library, we must presume that the
2624 only references to the symbol are via the global offset table.
2625 For such cases we need not do anything here; the relocations will
2626 be handled correctly by relocate_section. */
2627 if (bfd_link_pic (info))
2628 return TRUE;
2629
2630 /* If there are no references to this symbol that do not use the
2631 GOT, we don't need to generate a copy reloc. */
2632 if (!h->non_got_ref)
2633 return TRUE;
2634
2635 /* If -z nocopyreloc was given, we won't generate them either. */
2636 if (info->nocopyreloc)
2637 {
2638 h->non_got_ref = 0;
2639 return TRUE;
2640 }
2641
2642 eh = (struct elf32_mb_link_hash_entry *) h;
2643 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2644 {
2645 s = p->sec->output_section;
2646 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2647 break;
2648 }
2649
2650 /* If we didn't find any dynamic relocs in read-only sections, then
2651 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2652 if (p == NULL)
2653 {
2654 h->non_got_ref = 0;
2655 return TRUE;
2656 }
2657
2658 /* We must allocate the symbol in our .dynbss section, which will
2659 become part of the .bss section of the executable. There will be
2660 an entry for this symbol in the .dynsym section. The dynamic
2661 object will contain position independent code, so all references
2662 from the dynamic object to this symbol will go through the global
2663 offset table. The dynamic linker will use the .dynsym entry to
2664 determine the address it must put in the global offset table, so
2665 both the dynamic object and the regular object will refer to the
2666 same memory location for the variable. */
2667
2668 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2669 to copy the initial value out of the dynamic object and into the
2670 runtime process image. */
2671 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2672 {
2673 s = htab->elf.sdynrelro;
2674 srel = htab->elf.sreldynrelro;
2675 }
2676 else
2677 {
2678 s = htab->elf.sdynbss;
2679 srel = htab->elf.srelbss;
2680 }
2681 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2682 {
2683 srel->size += sizeof (Elf32_External_Rela);
2684 h->needs_copy = 1;
2685 }
2686
2687 /* We need to figure out the alignment required for this symbol. I
2688 have no idea how ELF linkers handle this. */
2689 power_of_two = bfd_log2 (h->size);
2690 if (power_of_two > 3)
2691 power_of_two = 3;
2692
2693 /* Apply the required alignment. */
2694 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2695 if (power_of_two > s->alignment_power)
2696 {
2697 if (!bfd_set_section_alignment (s->owner, s, power_of_two))
2698 return FALSE;
2699 }
2700
2701 /* Define the symbol as being at this point in the section. */
2702 h->root.u.def.section = s;
2703 h->root.u.def.value = s->size;
2704
2705 /* Increment the section size to make room for the symbol. */
2706 s->size += h->size;
2707 return TRUE;
2708 }
2709
2710 /* Allocate space in .plt, .got and associated reloc sections for
2711 dynamic relocs. */
2712
2713 static bfd_boolean
2714 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
2715 {
2716 struct bfd_link_info *info;
2717 struct elf32_mb_link_hash_table *htab;
2718 struct elf32_mb_link_hash_entry *eh;
2719 struct elf32_mb_dyn_relocs *p;
2720
2721 if (h->root.type == bfd_link_hash_indirect)
2722 return TRUE;
2723
2724 info = (struct bfd_link_info *) dat;
2725 htab = elf32_mb_hash_table (info);
2726 if (htab == NULL)
2727 return FALSE;
2728
2729 if (htab->elf.dynamic_sections_created
2730 && h->plt.refcount > 0)
2731 {
2732 /* Make sure this symbol is output as a dynamic symbol.
2733 Undefined weak syms won't yet be marked as dynamic. */
2734 if (h->dynindx == -1
2735 && !h->forced_local)
2736 {
2737 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2738 return FALSE;
2739 }
2740
2741 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
2742 {
2743 asection *s = htab->elf.splt;
2744
2745 /* The first entry in .plt is reserved. */
2746 if (s->size == 0)
2747 s->size = PLT_ENTRY_SIZE;
2748
2749 h->plt.offset = s->size;
2750
2751 /* If this symbol is not defined in a regular file, and we are
2752 not generating a shared library, then set the symbol to this
2753 location in the .plt. This is required to make function
2754 pointers compare as equal between the normal executable and
2755 the shared library. */
2756 if (! bfd_link_pic (info)
2757 && !h->def_regular)
2758 {
2759 h->root.u.def.section = s;
2760 h->root.u.def.value = h->plt.offset;
2761 }
2762
2763 /* Make room for this entry. */
2764 s->size += PLT_ENTRY_SIZE;
2765
2766 /* We also need to make an entry in the .got.plt section, which
2767 will be placed in the .got section by the linker script. */
2768 htab->elf.sgotplt->size += 4;
2769
2770 /* We also need to make an entry in the .rel.plt section. */
2771 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
2772 }
2773 else
2774 {
2775 h->plt.offset = (bfd_vma) -1;
2776 h->needs_plt = 0;
2777 }
2778 }
2779 else
2780 {
2781 h->plt.offset = (bfd_vma) -1;
2782 h->needs_plt = 0;
2783 }
2784
2785 eh = (struct elf32_mb_link_hash_entry *) h;
2786 if (h->got.refcount > 0)
2787 {
2788 unsigned int need;
2789 asection *s;
2790
2791 /* Make sure this symbol is output as a dynamic symbol.
2792 Undefined weak syms won't yet be marked as dynamic. */
2793 if (h->dynindx == -1
2794 && !h->forced_local)
2795 {
2796 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2797 return FALSE;
2798 }
2799
2800 need = 0;
2801 if ((eh->tls_mask & TLS_TLS) != 0)
2802 {
2803 /* Handle TLS Symbol */
2804 if ((eh->tls_mask & TLS_LD) != 0)
2805 {
2806 if (!eh->elf.def_dynamic)
2807 /* We'll just use htab->tlsld_got.offset. This should
2808 always be the case. It's a little odd if we have
2809 a local dynamic reloc against a non-local symbol. */
2810 htab->tlsld_got.refcount += 1;
2811 else
2812 need += 8;
2813 }
2814 if ((eh->tls_mask & TLS_GD) != 0)
2815 need += 8;
2816 }
2817 else
2818 {
2819 /* Regular (non-TLS) symbol */
2820 need += 4;
2821 }
2822 if (need == 0)
2823 {
2824 h->got.offset = (bfd_vma) -1;
2825 }
2826 else
2827 {
2828 s = htab->elf.sgot;
2829 h->got.offset = s->size;
2830 s->size += need;
2831 htab->elf.srelgot->size += need * (sizeof (Elf32_External_Rela) / 4);
2832 }
2833 }
2834 else
2835 h->got.offset = (bfd_vma) -1;
2836
2837 if (eh->dyn_relocs == NULL)
2838 return TRUE;
2839
2840 /* In the shared -Bsymbolic case, discard space allocated for
2841 dynamic pc-relative relocs against symbols which turn out to be
2842 defined in regular objects. For the normal shared case, discard
2843 space for pc-relative relocs that have become local due to symbol
2844 visibility changes. */
2845
2846 if (bfd_link_pic (info))
2847 {
2848 if (h->def_regular
2849 && (h->forced_local
2850 || info->symbolic))
2851 {
2852 struct elf32_mb_dyn_relocs **pp;
2853
2854 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2855 {
2856 p->count -= p->pc_count;
2857 p->pc_count = 0;
2858 if (p->count == 0)
2859 *pp = p->next;
2860 else
2861 pp = &p->next;
2862 }
2863 }
2864 }
2865 else
2866 {
2867 /* For the non-shared case, discard space for relocs against
2868 symbols which turn out to need copy relocs or are not
2869 dynamic. */
2870
2871 if (!h->non_got_ref
2872 && ((h->def_dynamic
2873 && !h->def_regular)
2874 || (htab->elf.dynamic_sections_created
2875 && (h->root.type == bfd_link_hash_undefweak
2876 || h->root.type == bfd_link_hash_undefined))))
2877 {
2878 /* Make sure this symbol is output as a dynamic symbol.
2879 Undefined weak syms won't yet be marked as dynamic. */
2880 if (h->dynindx == -1
2881 && !h->forced_local)
2882 {
2883 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2884 return FALSE;
2885 }
2886
2887 /* If that succeeded, we know we'll be keeping all the
2888 relocs. */
2889 if (h->dynindx != -1)
2890 goto keep;
2891 }
2892
2893 eh->dyn_relocs = NULL;
2894
2895 keep: ;
2896 }
2897
2898 /* Finally, allocate space. */
2899 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2900 {
2901 asection *sreloc = elf_section_data (p->sec)->sreloc;
2902 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2903 }
2904
2905 return TRUE;
2906 }
2907
2908 /* Set the sizes of the dynamic sections. */
2909
2910 static bfd_boolean
2911 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2912 struct bfd_link_info *info)
2913 {
2914 struct elf32_mb_link_hash_table *htab;
2915 bfd *dynobj;
2916 asection *s;
2917 bfd *ibfd;
2918
2919 htab = elf32_mb_hash_table (info);
2920 if (htab == NULL)
2921 return FALSE;
2922
2923 dynobj = htab->elf.dynobj;
2924 BFD_ASSERT (dynobj != NULL);
2925
2926 /* Set up .got offsets for local syms, and space for local dynamic
2927 relocs. */
2928 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2929 {
2930 bfd_signed_vma *local_got;
2931 bfd_signed_vma *end_local_got;
2932 bfd_size_type locsymcount;
2933 Elf_Internal_Shdr *symtab_hdr;
2934 unsigned char *lgot_masks;
2935 asection *srel;
2936
2937 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2938 continue;
2939
2940 for (s = ibfd->sections; s != NULL; s = s->next)
2941 {
2942 struct elf32_mb_dyn_relocs *p;
2943
2944 for (p = ((struct elf32_mb_dyn_relocs *)
2945 elf_section_data (s)->local_dynrel);
2946 p != NULL;
2947 p = p->next)
2948 {
2949 if (!bfd_is_abs_section (p->sec)
2950 && bfd_is_abs_section (p->sec->output_section))
2951 {
2952 /* Input section has been discarded, either because
2953 it is a copy of a linkonce section or due to
2954 linker script /DISCARD/, so we'll be discarding
2955 the relocs too. */
2956 }
2957 else if (p->count != 0)
2958 {
2959 srel = elf_section_data (p->sec)->sreloc;
2960 srel->size += p->count * sizeof (Elf32_External_Rela);
2961 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2962 info->flags |= DF_TEXTREL;
2963 }
2964 }
2965 }
2966
2967 local_got = elf_local_got_refcounts (ibfd);
2968 if (!local_got)
2969 continue;
2970
2971 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2972 locsymcount = symtab_hdr->sh_info;
2973 end_local_got = local_got + locsymcount;
2974 lgot_masks = (unsigned char *) end_local_got;
2975 s = htab->elf.sgot;
2976 srel = htab->elf.srelgot;
2977
2978 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
2979 {
2980 if (*local_got > 0)
2981 {
2982 unsigned int need = 0;
2983 if ((*lgot_masks & TLS_TLS) != 0)
2984 {
2985 if ((*lgot_masks & TLS_GD) != 0)
2986 need += 8;
2987 if ((*lgot_masks & TLS_LD) != 0)
2988 htab->tlsld_got.refcount += 1;
2989 }
2990 else
2991 need += 4;
2992
2993 if (need == 0)
2994 {
2995 *local_got = (bfd_vma) -1;
2996 }
2997 else
2998 {
2999 *local_got = s->size;
3000 s->size += need;
3001 if (bfd_link_pic (info))
3002 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
3003 }
3004 }
3005 else
3006 *local_got = (bfd_vma) -1;
3007 }
3008 }
3009
3010 /* Allocate global sym .plt and .got entries, and space for global
3011 sym dynamic relocs. */
3012 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3013
3014 if (htab->tlsld_got.refcount > 0)
3015 {
3016 htab->tlsld_got.offset = htab->elf.sgot->size;
3017 htab->elf.sgot->size += 8;
3018 if (bfd_link_pic (info))
3019 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
3020 }
3021 else
3022 htab->tlsld_got.offset = (bfd_vma) -1;
3023
3024 if (elf_hash_table (info)->dynamic_sections_created)
3025 {
3026 /* Make space for the trailing nop in .plt. */
3027 if (htab->elf.splt->size > 0)
3028 htab->elf.splt->size += 4;
3029 }
3030
3031 /* The check_relocs and adjust_dynamic_symbol entry points have
3032 determined the sizes of the various dynamic sections. Allocate
3033 memory for them. */
3034 for (s = dynobj->sections; s != NULL; s = s->next)
3035 {
3036 const char *name;
3037 bfd_boolean strip = FALSE;
3038
3039 if ((s->flags & SEC_LINKER_CREATED) == 0)
3040 continue;
3041
3042 /* It's OK to base decisions on the section name, because none
3043 of the dynobj section names depend upon the input files. */
3044 name = bfd_get_section_name (dynobj, s);
3045
3046 if (strncmp (name, ".rela", 5) == 0)
3047 {
3048 if (s->size == 0)
3049 {
3050 /* If we don't need this section, strip it from the
3051 output file. This is to handle .rela.bss and
3052 .rela.plt. We must create it in
3053 create_dynamic_sections, because it must be created
3054 before the linker maps input sections to output
3055 sections. The linker does that before
3056 adjust_dynamic_symbol is called, and it is that
3057 function which decides whether anything needs to go
3058 into these sections. */
3059 strip = TRUE;
3060 }
3061 else
3062 {
3063 /* We use the reloc_count field as a counter if we need
3064 to copy relocs into the output file. */
3065 s->reloc_count = 0;
3066 }
3067 }
3068 else if (s != htab->elf.splt
3069 && s != htab->elf.sgot
3070 && s != htab->elf.sgotplt
3071 && s != htab->elf.sdynbss
3072 && s != htab->elf.sdynrelro)
3073 {
3074 /* It's not one of our sections, so don't allocate space. */
3075 continue;
3076 }
3077
3078 if (strip)
3079 {
3080 s->flags |= SEC_EXCLUDE;
3081 continue;
3082 }
3083
3084 /* Allocate memory for the section contents. */
3085 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3086 Unused entries should be reclaimed before the section's contents
3087 are written out, but at the moment this does not happen. Thus in
3088 order to prevent writing out garbage, we initialise the section's
3089 contents to zero. */
3090 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3091 if (s->contents == NULL && s->size != 0)
3092 return FALSE;
3093 }
3094
3095 if (elf_hash_table (info)->dynamic_sections_created)
3096 {
3097 /* Add some entries to the .dynamic section. We fill in the
3098 values later, in microblaze_elf_finish_dynamic_sections, but we
3099 must add the entries now so that we get the correct size for
3100 the .dynamic section. The DT_DEBUG entry is filled in by the
3101 dynamic linker and used by the debugger. */
3102 #define add_dynamic_entry(TAG, VAL) \
3103 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3104
3105 if (bfd_link_executable (info))
3106 {
3107 if (!add_dynamic_entry (DT_DEBUG, 0))
3108 return FALSE;
3109 }
3110
3111 if (!add_dynamic_entry (DT_RELA, 0)
3112 || !add_dynamic_entry (DT_RELASZ, 0)
3113 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3114 return FALSE;
3115
3116 if (htab->elf.splt->size != 0)
3117 {
3118 if (!add_dynamic_entry (DT_PLTGOT, 0)
3119 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3120 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3121 || !add_dynamic_entry (DT_JMPREL, 0)
3122 || !add_dynamic_entry (DT_BIND_NOW, 1))
3123 return FALSE;
3124 }
3125
3126 if (info->flags & DF_TEXTREL)
3127 {
3128 if (!add_dynamic_entry (DT_TEXTREL, 0))
3129 return FALSE;
3130 }
3131 }
3132 #undef add_dynamic_entry
3133 return TRUE;
3134 }
3135
3136 /* Finish up dynamic symbol handling. We set the contents of various
3137 dynamic sections here. */
3138
3139 static bfd_boolean
3140 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
3141 struct bfd_link_info *info,
3142 struct elf_link_hash_entry *h,
3143 Elf_Internal_Sym *sym)
3144 {
3145 struct elf32_mb_link_hash_table *htab;
3146 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h);
3147
3148 htab = elf32_mb_hash_table (info);
3149 if (htab == NULL)
3150 return FALSE;
3151
3152 if (h->plt.offset != (bfd_vma) -1)
3153 {
3154 asection *splt;
3155 asection *srela;
3156 asection *sgotplt;
3157 Elf_Internal_Rela rela;
3158 bfd_byte *loc;
3159 bfd_vma plt_index;
3160 bfd_vma got_offset;
3161 bfd_vma got_addr;
3162
3163 /* This symbol has an entry in the procedure linkage table. Set
3164 it up. */
3165 BFD_ASSERT (h->dynindx != -1);
3166
3167 splt = htab->elf.splt;
3168 srela = htab->elf.srelplt;
3169 sgotplt = htab->elf.sgotplt;
3170 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
3171
3172 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
3173 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
3174 got_addr = got_offset;
3175
3176 /* For non-PIC objects we need absolute address of the GOT entry. */
3177 if (!bfd_link_pic (info))
3178 got_addr += sgotplt->output_section->vma + sgotplt->output_offset;
3179
3180 /* Fill in the entry in the procedure linkage table. */
3181 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
3182 splt->contents + h->plt.offset);
3183 if (bfd_link_pic (info))
3184 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
3185 splt->contents + h->plt.offset + 4);
3186 else
3187 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
3188 splt->contents + h->plt.offset + 4);
3189 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
3190 splt->contents + h->plt.offset + 8);
3191 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
3192 splt->contents + h->plt.offset + 12);
3193
3194 /* Any additions to the .got section??? */
3195 /* bfd_put_32 (output_bfd,
3196 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3197 sgotplt->contents + got_offset); */
3198
3199 /* Fill in the entry in the .rela.plt section. */
3200 rela.r_offset = (sgotplt->output_section->vma
3201 + sgotplt->output_offset
3202 + got_offset);
3203 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
3204 rela.r_addend = 0;
3205 loc = srela->contents;
3206 loc += plt_index * sizeof (Elf32_External_Rela);
3207 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3208
3209 if (!h->def_regular)
3210 {
3211 /* Mark the symbol as undefined, rather than as defined in
3212 the .plt section. Zero the value. */
3213 sym->st_shndx = SHN_UNDEF;
3214 sym->st_value = 0;
3215 }
3216 }
3217
3218 /* h->got.refcount to be checked ? */
3219 if (h->got.offset != (bfd_vma) -1 &&
3220 ! ((h->got.offset & 1) ||
3221 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask)))
3222 {
3223 asection *sgot;
3224 asection *srela;
3225 bfd_vma offset;
3226
3227 /* This symbol has an entry in the global offset table. Set it
3228 up. */
3229
3230 sgot = htab->elf.sgot;
3231 srela = htab->elf.srelgot;
3232 BFD_ASSERT (sgot != NULL && srela != NULL);
3233
3234 offset = (sgot->output_section->vma + sgot->output_offset
3235 + (h->got.offset &~ (bfd_vma) 1));
3236
3237 /* If this is a -Bsymbolic link, and the symbol is defined
3238 locally, we just want to emit a RELATIVE reloc. Likewise if
3239 the symbol was forced to be local because of a version file.
3240 The entry in the global offset table will already have been
3241 initialized in the relocate_section function. */
3242 if (bfd_link_pic (info)
3243 && ((info->symbolic && h->def_regular)
3244 || h->dynindx == -1))
3245 {
3246 asection *sec = h->root.u.def.section;
3247 bfd_vma value;
3248
3249 value = h->root.u.def.value;
3250 if (sec->output_section != NULL)
3251 /* PR 21180: If the output section is NULL, then the symbol is no
3252 longer needed, and in theory the GOT entry is redundant. But
3253 it is too late to change our minds now... */
3254 value += sec->output_section->vma + sec->output_offset;
3255
3256 microblaze_elf_output_dynamic_relocation (output_bfd,
3257 srela, srela->reloc_count++,
3258 /* symindex= */ 0,
3259 R_MICROBLAZE_REL, offset,
3260 value);
3261 }
3262 else
3263 {
3264 microblaze_elf_output_dynamic_relocation (output_bfd,
3265 srela, srela->reloc_count++,
3266 h->dynindx,
3267 R_MICROBLAZE_GLOB_DAT,
3268 offset, 0);
3269 }
3270
3271 bfd_put_32 (output_bfd, (bfd_vma) 0,
3272 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
3273 }
3274
3275 if (h->needs_copy)
3276 {
3277 asection *s;
3278 Elf_Internal_Rela rela;
3279 bfd_byte *loc;
3280
3281 /* This symbols needs a copy reloc. Set it up. */
3282
3283 BFD_ASSERT (h->dynindx != -1);
3284
3285 rela.r_offset = (h->root.u.def.value
3286 + h->root.u.def.section->output_section->vma
3287 + h->root.u.def.section->output_offset);
3288 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
3289 rela.r_addend = 0;
3290 if (h->root.u.def.section == htab->elf.sdynrelro)
3291 s = htab->elf.sreldynrelro;
3292 else
3293 s = htab->elf.srelbss;
3294 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3295 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3296 }
3297
3298 /* Mark some specially defined symbols as absolute. */
3299 if (h == htab->elf.hdynamic
3300 || h == htab->elf.hgot
3301 || h == htab->elf.hplt)
3302 sym->st_shndx = SHN_ABS;
3303
3304 return TRUE;
3305 }
3306
3307
3308 /* Finish up the dynamic sections. */
3309
3310 static bfd_boolean
3311 microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
3312 struct bfd_link_info *info)
3313 {
3314 bfd *dynobj;
3315 asection *sdyn, *sgot;
3316 struct elf32_mb_link_hash_table *htab;
3317
3318 htab = elf32_mb_hash_table (info);
3319 if (htab == NULL)
3320 return FALSE;
3321
3322 dynobj = htab->elf.dynobj;
3323
3324 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3325
3326 if (htab->elf.dynamic_sections_created)
3327 {
3328 asection *splt;
3329 Elf32_External_Dyn *dyncon, *dynconend;
3330
3331 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3332 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3333 for (; dyncon < dynconend; dyncon++)
3334 {
3335 Elf_Internal_Dyn dyn;
3336 asection *s;
3337 bfd_boolean size;
3338
3339 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3340
3341 switch (dyn.d_tag)
3342 {
3343 case DT_PLTGOT:
3344 s = htab->elf.sgotplt;
3345 size = FALSE;
3346 break;
3347
3348 case DT_PLTRELSZ:
3349 s = htab->elf.srelplt;
3350 size = TRUE;
3351 break;
3352
3353 case DT_JMPREL:
3354 s = htab->elf.srelplt;
3355 size = FALSE;
3356 break;
3357
3358 default:
3359 continue;
3360 }
3361
3362 if (s == NULL)
3363 dyn.d_un.d_val = 0;
3364 else
3365 {
3366 if (!size)
3367 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3368 else
3369 dyn.d_un.d_val = s->size;
3370 }
3371 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3372 }
3373
3374 splt = htab->elf.splt;
3375 BFD_ASSERT (splt != NULL && sdyn != NULL);
3376
3377 /* Clear the first entry in the procedure linkage table,
3378 and put a nop in the last four bytes. */
3379 if (splt->size > 0)
3380 {
3381 memset (splt->contents, 0, PLT_ENTRY_SIZE);
3382 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
3383 splt->contents + splt->size - 4);
3384 }
3385
3386 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3387 }
3388
3389 /* Set the first entry in the global offset table to the address of
3390 the dynamic section. */
3391 sgot = htab->elf.sgotplt;
3392 if (sgot && sgot->size > 0)
3393 {
3394 if (sdyn == NULL)
3395 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3396 else
3397 bfd_put_32 (output_bfd,
3398 sdyn->output_section->vma + sdyn->output_offset,
3399 sgot->contents);
3400 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3401 }
3402
3403 if (htab->elf.sgot && htab->elf.sgot->size > 0)
3404 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
3405
3406 return TRUE;
3407 }
3408
3409 /* Hook called by the linker routine which adds symbols from an object
3410 file. We use it to put .comm items in .sbss, and not .bss. */
3411
3412 static bfd_boolean
3413 microblaze_elf_add_symbol_hook (bfd *abfd,
3414 struct bfd_link_info *info,
3415 Elf_Internal_Sym *sym,
3416 const char **namep ATTRIBUTE_UNUSED,
3417 flagword *flagsp ATTRIBUTE_UNUSED,
3418 asection **secp,
3419 bfd_vma *valp)
3420 {
3421 if (sym->st_shndx == SHN_COMMON
3422 && !bfd_link_relocatable (info)
3423 && sym->st_size <= elf_gp_size (abfd))
3424 {
3425 /* Common symbols less than or equal to -G nn bytes are automatically
3426 put into .sbss. */
3427 *secp = bfd_make_section_old_way (abfd, ".sbss");
3428 if (*secp == NULL
3429 || ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON))
3430 return FALSE;
3431
3432 *valp = sym->st_size;
3433 }
3434
3435 return TRUE;
3436 }
3437
3438 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3439 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3440
3441 #define TARGET_BIG_SYM microblaze_elf32_vec
3442 #define TARGET_BIG_NAME "elf32-microblaze"
3443
3444 #define ELF_ARCH bfd_arch_microblaze
3445 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3446 #define ELF_MACHINE_CODE EM_MICROBLAZE
3447 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3448 #define ELF_MAXPAGESIZE 0x1000
3449 #define elf_info_to_howto microblaze_elf_info_to_howto
3450 #define elf_info_to_howto_rel NULL
3451
3452 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3453 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3454 #define elf_backend_relocate_section microblaze_elf_relocate_section
3455 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3456 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
3457 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3458
3459 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3460 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3461 #define elf_backend_check_relocs microblaze_elf_check_relocs
3462 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3463 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3464 #define elf_backend_can_gc_sections 1
3465 #define elf_backend_can_refcount 1
3466 #define elf_backend_want_got_plt 1
3467 #define elf_backend_plt_readonly 1
3468 #define elf_backend_got_header_size 12
3469 #define elf_backend_want_dynrelro 1
3470 #define elf_backend_rela_normal 1
3471 #define elf_backend_dtrel_excludes_plt 1
3472
3473 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3474 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3475 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3476 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3477 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3478 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3479
3480 #include "elf32-target.h"
GDB Binutils - Deliverables
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