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gdb: add target_ops::supports_displaced_step
[deliverable/binutils-gdb.git] / bfd / elf32-microblaze.c
1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
2
3 Copyright (C) 2009-2020 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 TEXTPCREL relocation. Table-entry not really used. */
255 HOWTO (R_MICROBLAZE_TEXTPCREL_64, /* Type. */
256 0, /* Rightshift. */
257 2, /* Size (0 = byte, 1 = short, 2 = long). */
258 16, /* Bitsize. */
259 TRUE, /* PC_relative. */
260 0, /* Bitpos. */
261 complain_overflow_dont, /* Complain on overflow. */
262 bfd_elf_generic_reloc, /* Special Function. */
263 "R_MICROBLAZE_TEXTPCREL_64", /* Name. */
264 FALSE, /* Partial Inplace. */
265 0, /* Source Mask. */
266 0x0000ffff, /* Dest Mask. */
267 TRUE), /* PC relative offset? */
268
269 /* A 64 bit GOT relocation. Table-entry not really used. */
270 HOWTO (R_MICROBLAZE_GOT_64, /* Type. */
271 0, /* Rightshift. */
272 2, /* Size (0 = byte, 1 = short, 2 = long). */
273 16, /* Bitsize. */
274 FALSE, /* PC_relative. */
275 0, /* Bitpos. */
276 complain_overflow_dont, /* Complain on overflow. */
277 bfd_elf_generic_reloc,/* Special Function. */
278 "R_MICROBLAZE_GOT_64",/* Name. */
279 FALSE, /* Partial Inplace. */
280 0, /* Source Mask. */
281 0x0000ffff, /* Dest Mask. */
282 FALSE), /* PC relative offset? */
283
284 /* A 64 bit TEXTREL relocation. Table-entry not really used. */
285 HOWTO (R_MICROBLAZE_TEXTREL_64, /* Type. */
286 0, /* Rightshift. */
287 2, /* Size (0 = byte, 1 = short, 2 = long). */
288 16, /* Bitsize. */
289 FALSE, /* PC_relative. */
290 0, /* Bitpos. */
291 complain_overflow_dont, /* Complain on overflow. */
292 bfd_elf_generic_reloc,/* Special Function. */
293 "R_MICROBLAZE_TEXTREL_64",/* Name. */
294 FALSE, /* Partial Inplace. */
295 0, /* Source Mask. */
296 0x0000ffff, /* Dest Mask. */
297 FALSE), /* PC relative offset? */
298
299 /* A 64 bit PLT relocation. Table-entry not really used. */
300 HOWTO (R_MICROBLAZE_PLT_64, /* 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_PLT_64",/* 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_REL, /* 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_REL", /* Name. */
324 FALSE, /* Partial Inplace. */
325 0, /* Source Mask. */
326 0x0000ffff, /* Dest Mask. */
327 TRUE), /* PC relative offset? */
328
329 /* Table-entry not really used. */
330 HOWTO (R_MICROBLAZE_JUMP_SLOT,/* Type. */
331 0, /* Rightshift. */
332 2, /* Size (0 = byte, 1 = short, 2 = long). */
333 16, /* Bitsize. */
334 TRUE, /* PC_relative. */
335 0, /* Bitpos. */
336 complain_overflow_dont, /* Complain on overflow. */
337 bfd_elf_generic_reloc,/* Special Function. */
338 "R_MICROBLAZE_JUMP_SLOT", /* Name. */
339 FALSE, /* Partial Inplace. */
340 0, /* Source Mask. */
341 0x0000ffff, /* Dest Mask. */
342 TRUE), /* PC relative offset? */
343
344 /* Table-entry not really used. */
345 HOWTO (R_MICROBLAZE_GLOB_DAT,/* Type. */
346 0, /* Rightshift. */
347 2, /* Size (0 = byte, 1 = short, 2 = long). */
348 16, /* Bitsize. */
349 TRUE, /* PC_relative. */
350 0, /* Bitpos. */
351 complain_overflow_dont, /* Complain on overflow. */
352 bfd_elf_generic_reloc,/* Special Function. */
353 "R_MICROBLAZE_GLOB_DAT", /* Name. */
354 FALSE, /* Partial Inplace. */
355 0, /* Source Mask. */
356 0x0000ffff, /* Dest Mask. */
357 TRUE), /* PC relative offset? */
358
359 /* A 64 bit GOT relative relocation. Table-entry not really used. */
360 HOWTO (R_MICROBLAZE_GOTOFF_64, /* 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_GOTOFF_64", /* Name. */
369 FALSE, /* Partial Inplace. */
370 0, /* Source Mask. */
371 0x0000ffff, /* Dest Mask. */
372 FALSE), /* PC relative offset? */
373
374 /* A 32 bit GOT relative relocation. Table-entry not really used. */
375 HOWTO (R_MICROBLAZE_GOTOFF_32, /* Type. */
376 0, /* Rightshift. */
377 2, /* Size (0 = byte, 1 = short, 2 = long). */
378 16, /* 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_GOTOFF_32", /* Name. */
384 FALSE, /* Partial Inplace. */
385 0, /* Source Mask. */
386 0x0000ffff, /* Dest Mask. */
387 FALSE), /* PC relative offset? */
388
389 /* COPY relocation. Table-entry not really used. */
390 HOWTO (R_MICROBLAZE_COPY, /* Type. */
391 0, /* Rightshift. */
392 2, /* Size (0 = byte, 1 = short, 2 = long). */
393 16, /* Bitsize. */
394 FALSE, /* PC_relative. */
395 0, /* Bitpos. */
396 complain_overflow_dont, /* Complain on overflow. */
397 bfd_elf_generic_reloc,/* Special Function. */
398 "R_MICROBLAZE_COPY", /* Name. */
399 FALSE, /* Partial Inplace. */
400 0, /* Source Mask. */
401 0x0000ffff, /* Dest Mask. */
402 FALSE), /* PC relative offset? */
403
404 /* Marker relocs for TLS. */
405 HOWTO (R_MICROBLAZE_TLS,
406 0, /* rightshift */
407 2, /* size (0 = byte, 1 = short, 2 = long) */
408 32, /* bitsize */
409 FALSE, /* pc_relative */
410 0, /* bitpos */
411 complain_overflow_dont, /* complain_on_overflow */
412 bfd_elf_generic_reloc, /* special_function */
413 "R_MICROBLAZE_TLS", /* name */
414 FALSE, /* partial_inplace */
415 0, /* src_mask */
416 0x0000ffff, /* dst_mask */
417 FALSE), /* pcrel_offset */
418
419 HOWTO (R_MICROBLAZE_TLSGD,
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_TLSGD", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000ffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 HOWTO (R_MICROBLAZE_TLSLD,
434 0, /* rightshift */
435 2, /* size (0 = byte, 1 = short, 2 = long) */
436 32, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_dont, /* complain_on_overflow */
440 bfd_elf_generic_reloc, /* special_function */
441 "R_MICROBLAZE_TLSLD", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0x0000ffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Computes the load module index of the load module that contains the
448 definition of its TLS sym. */
449 HOWTO (R_MICROBLAZE_TLSDTPMOD32,
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 32, /* bitsize */
453 FALSE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_dont, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_MICROBLAZE_TLSDTPMOD32", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x0000ffff, /* dst_mask */
461 FALSE), /* pcrel_offset */
462
463 /* Computes a dtv-relative displacement, the difference between the value
464 of sym+add and the base address of the thread-local storage block that
465 contains the definition of sym, minus 0x8000. Used for initializing GOT */
466 HOWTO (R_MICROBLAZE_TLSDTPREL32,
467 0, /* rightshift */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
469 32, /* bitsize */
470 FALSE, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_dont, /* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 "R_MICROBLAZE_TLSDTPREL32", /* name */
475 FALSE, /* partial_inplace */
476 0, /* src_mask */
477 0x0000ffff, /* dst_mask */
478 FALSE), /* pcrel_offset */
479
480 /* Computes a dtv-relative displacement, the difference between the value
481 of sym+add and the base address of the thread-local storage block that
482 contains the definition of sym, minus 0x8000. */
483 HOWTO (R_MICROBLAZE_TLSDTPREL64,
484 0, /* rightshift */
485 2, /* size (0 = byte, 1 = short, 2 = long) */
486 32, /* bitsize */
487 FALSE, /* pc_relative */
488 0, /* bitpos */
489 complain_overflow_dont, /* complain_on_overflow */
490 bfd_elf_generic_reloc, /* special_function */
491 "R_MICROBLAZE_TLSDTPREL64", /* name */
492 FALSE, /* partial_inplace */
493 0, /* src_mask */
494 0x0000ffff, /* dst_mask */
495 FALSE), /* pcrel_offset */
496
497 /* Computes a tp-relative displacement, the difference between the value of
498 sym+add and the value of the thread pointer (r13). */
499 HOWTO (R_MICROBLAZE_TLSGOTTPREL32,
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_MICROBLAZE_TLSGOTTPREL32", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0x0000ffff, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Computes a tp-relative displacement, the difference between the value of
514 sym+add and the value of the thread pointer (r13). */
515 HOWTO (R_MICROBLAZE_TLSTPREL32,
516 0, /* rightshift */
517 2, /* size (0 = byte, 1 = short, 2 = long) */
518 32, /* bitsize */
519 FALSE, /* pc_relative */
520 0, /* bitpos */
521 complain_overflow_dont, /* complain_on_overflow */
522 bfd_elf_generic_reloc, /* special_function */
523 "R_MICROBLAZE_TLSTPREL32", /* name */
524 FALSE, /* partial_inplace */
525 0, /* src_mask */
526 0x0000ffff, /* dst_mask */
527 FALSE), /* pcrel_offset */
528
529 };
530
531 #ifndef NUM_ELEM
532 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
533 #endif
534 \f
535 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
536
537 static void
538 microblaze_elf_howto_init (void)
539 {
540 unsigned int i;
541
542 for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;)
543 {
544 unsigned int type;
545
546 type = microblaze_elf_howto_raw[i].type;
547
548 BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table));
549
550 microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i];
551 }
552 }
553 \f
554 static reloc_howto_type *
555 microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
556 bfd_reloc_code_real_type code)
557 {
558 enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE;
559
560 switch (code)
561 {
562 case BFD_RELOC_NONE:
563 microblaze_reloc = R_MICROBLAZE_NONE;
564 break;
565 case BFD_RELOC_MICROBLAZE_64_NONE:
566 microblaze_reloc = R_MICROBLAZE_64_NONE;
567 break;
568 case BFD_RELOC_32:
569 microblaze_reloc = R_MICROBLAZE_32;
570 break;
571 /* RVA is treated the same as 32 */
572 case BFD_RELOC_RVA:
573 microblaze_reloc = R_MICROBLAZE_32;
574 break;
575 case BFD_RELOC_32_PCREL:
576 microblaze_reloc = R_MICROBLAZE_32_PCREL;
577 break;
578 case BFD_RELOC_64_PCREL:
579 microblaze_reloc = R_MICROBLAZE_64_PCREL;
580 break;
581 case BFD_RELOC_MICROBLAZE_32_LO_PCREL:
582 microblaze_reloc = R_MICROBLAZE_32_PCREL_LO;
583 break;
584 case BFD_RELOC_64:
585 microblaze_reloc = R_MICROBLAZE_64;
586 break;
587 case BFD_RELOC_MICROBLAZE_32_LO:
588 microblaze_reloc = R_MICROBLAZE_32_LO;
589 break;
590 case BFD_RELOC_MICROBLAZE_32_ROSDA:
591 microblaze_reloc = R_MICROBLAZE_SRO32;
592 break;
593 case BFD_RELOC_MICROBLAZE_32_RWSDA:
594 microblaze_reloc = R_MICROBLAZE_SRW32;
595 break;
596 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM:
597 microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM;
598 break;
599 case BFD_RELOC_VTABLE_INHERIT:
600 microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT;
601 break;
602 case BFD_RELOC_VTABLE_ENTRY:
603 microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY;
604 break;
605 case BFD_RELOC_MICROBLAZE_64_GOTPC:
606 microblaze_reloc = R_MICROBLAZE_GOTPC_64;
607 break;
608 case BFD_RELOC_MICROBLAZE_64_GOT:
609 microblaze_reloc = R_MICROBLAZE_GOT_64;
610 break;
611 case BFD_RELOC_MICROBLAZE_64_TEXTPCREL:
612 microblaze_reloc = R_MICROBLAZE_TEXTPCREL_64;
613 break;
614 case BFD_RELOC_MICROBLAZE_64_TEXTREL:
615 microblaze_reloc = R_MICROBLAZE_TEXTREL_64;
616 break;
617 case BFD_RELOC_MICROBLAZE_64_PLT:
618 microblaze_reloc = R_MICROBLAZE_PLT_64;
619 break;
620 case BFD_RELOC_MICROBLAZE_64_GOTOFF:
621 microblaze_reloc = R_MICROBLAZE_GOTOFF_64;
622 break;
623 case BFD_RELOC_MICROBLAZE_32_GOTOFF:
624 microblaze_reloc = R_MICROBLAZE_GOTOFF_32;
625 break;
626 case BFD_RELOC_MICROBLAZE_64_TLSGD:
627 microblaze_reloc = R_MICROBLAZE_TLSGD;
628 break;
629 case BFD_RELOC_MICROBLAZE_64_TLSLD:
630 microblaze_reloc = R_MICROBLAZE_TLSLD;
631 break;
632 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL:
633 microblaze_reloc = R_MICROBLAZE_TLSDTPREL32;
634 break;
635 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL:
636 microblaze_reloc = R_MICROBLAZE_TLSDTPREL64;
637 break;
638 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD:
639 microblaze_reloc = R_MICROBLAZE_TLSDTPMOD32;
640 break;
641 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL:
642 microblaze_reloc = R_MICROBLAZE_TLSGOTTPREL32;
643 break;
644 case BFD_RELOC_MICROBLAZE_64_TLSTPREL:
645 microblaze_reloc = R_MICROBLAZE_TLSTPREL32;
646 break;
647 case BFD_RELOC_MICROBLAZE_COPY:
648 microblaze_reloc = R_MICROBLAZE_COPY;
649 break;
650 default:
651 return (reloc_howto_type *) NULL;
652 }
653
654 if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
655 /* Initialize howto table if needed. */
656 microblaze_elf_howto_init ();
657
658 return microblaze_elf_howto_table [(int) microblaze_reloc];
659 };
660
661 static reloc_howto_type *
662 microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
663 const char *r_name)
664 {
665 unsigned int i;
666
667 for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++)
668 if (microblaze_elf_howto_raw[i].name != NULL
669 && strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0)
670 return &microblaze_elf_howto_raw[i];
671
672 return NULL;
673 }
674
675 /* Set the howto pointer for a RCE ELF reloc. */
676
677 static bfd_boolean
678 microblaze_elf_info_to_howto (bfd * abfd,
679 arelent * cache_ptr,
680 Elf_Internal_Rela * dst)
681 {
682 unsigned int r_type;
683
684 if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
685 /* Initialize howto table if needed. */
686 microblaze_elf_howto_init ();
687
688 r_type = ELF32_R_TYPE (dst->r_info);
689 if (r_type >= R_MICROBLAZE_max)
690 {
691 /* xgettext:c-format */
692 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
693 abfd, r_type);
694 bfd_set_error (bfd_error_bad_value);
695 return FALSE;
696 }
697
698 cache_ptr->howto = microblaze_elf_howto_table [r_type];
699 return TRUE;
700 }
701
702 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
703
704 static bfd_boolean
705 microblaze_elf_is_local_label_name (bfd *abfd, const char *name)
706 {
707 if (name[0] == 'L' && name[1] == '.')
708 return TRUE;
709
710 if (name[0] == '$' && name[1] == 'L')
711 return TRUE;
712
713 /* With gcc, the labels go back to starting with '.', so we accept
714 the generic ELF local label syntax as well. */
715 return _bfd_elf_is_local_label_name (abfd, name);
716 }
717
718 /* ELF linker hash entry. */
719
720 struct elf32_mb_link_hash_entry
721 {
722 struct elf_link_hash_entry elf;
723
724 /* TLS Reference Types for the symbol; Updated by check_relocs */
725 #define TLS_GD 1 /* GD reloc. */
726 #define TLS_LD 2 /* LD reloc. */
727 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
728 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
729 #define TLS_TLS 16 /* Any TLS reloc. */
730 unsigned char tls_mask;
731
732 };
733
734 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD))
735 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD))
736 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL))
737 #define IS_TLS_NONE(x) (x == 0)
738
739 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
740
741 /* ELF linker hash table. */
742
743 struct elf32_mb_link_hash_table
744 {
745 struct elf_link_hash_table elf;
746
747 /* Small local sym to section mapping cache. */
748 struct sym_cache sym_sec;
749
750 /* TLS Local Dynamic GOT Entry */
751 union {
752 bfd_signed_vma refcount;
753 bfd_vma offset;
754 } tlsld_got;
755 };
756
757 /* Nonzero if this section has TLS related relocations. */
758 #define has_tls_reloc sec_flg0
759
760 /* Get the ELF linker hash table from a link_info structure. */
761
762 #define elf32_mb_hash_table(p) \
763 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
764 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL)
765
766 /* Create an entry in a microblaze ELF linker hash table. */
767
768 static struct bfd_hash_entry *
769 link_hash_newfunc (struct bfd_hash_entry *entry,
770 struct bfd_hash_table *table,
771 const char *string)
772 {
773 /* Allocate the structure if it has not already been allocated by a
774 subclass. */
775 if (entry == NULL)
776 {
777 entry = bfd_hash_allocate (table,
778 sizeof (struct elf32_mb_link_hash_entry));
779 if (entry == NULL)
780 return entry;
781 }
782
783 /* Call the allocation method of the superclass. */
784 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
785 if (entry != NULL)
786 {
787 struct elf32_mb_link_hash_entry *eh;
788
789 eh = (struct elf32_mb_link_hash_entry *) entry;
790 eh->tls_mask = 0;
791 }
792
793 return entry;
794 }
795
796 /* Create a mb ELF linker hash table. */
797
798 static struct bfd_link_hash_table *
799 microblaze_elf_link_hash_table_create (bfd *abfd)
800 {
801 struct elf32_mb_link_hash_table *ret;
802 size_t amt = sizeof (struct elf32_mb_link_hash_table);
803
804 ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt);
805 if (ret == NULL)
806 return NULL;
807
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf32_mb_link_hash_entry),
810 MICROBLAZE_ELF_DATA))
811 {
812 free (ret);
813 return NULL;
814 }
815
816 return &ret->elf.root;
817 }
818 \f
819 /* Set the values of the small data pointers. */
820
821 static void
822 microblaze_elf_final_sdp (struct bfd_link_info *info)
823 {
824 struct bfd_link_hash_entry *h;
825
826 h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
827 if (h != (struct bfd_link_hash_entry *) NULL
828 && h->type == bfd_link_hash_defined)
829 ro_small_data_pointer = (h->u.def.value
830 + h->u.def.section->output_section->vma
831 + h->u.def.section->output_offset);
832
833 h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
834 if (h != (struct bfd_link_hash_entry *) NULL
835 && h->type == bfd_link_hash_defined)
836 rw_small_data_pointer = (h->u.def.value
837 + h->u.def.section->output_section->vma
838 + h->u.def.section->output_offset);
839 }
840
841 static bfd_vma
842 dtprel_base (struct bfd_link_info *info)
843 {
844 /* If tls_sec is NULL, we should have signalled an error already. */
845 if (elf_hash_table (info)->tls_sec == NULL)
846 return 0;
847 return elf_hash_table (info)->tls_sec->vma;
848 }
849
850 /* The size of the thread control block. */
851 #define TCB_SIZE 8
852
853 /* Output a simple dynamic relocation into SRELOC. */
854
855 static void
856 microblaze_elf_output_dynamic_relocation (bfd *output_bfd,
857 asection *sreloc,
858 unsigned long reloc_index,
859 unsigned long indx,
860 int r_type,
861 bfd_vma offset,
862 bfd_vma addend)
863 {
864
865 Elf_Internal_Rela rel;
866
867 rel.r_info = ELF32_R_INFO (indx, r_type);
868 rel.r_offset = offset;
869 rel.r_addend = addend;
870
871 bfd_elf32_swap_reloca_out (output_bfd, &rel,
872 (sreloc->contents + reloc_index * sizeof (Elf32_External_Rela)));
873 }
874
875 /* This code is taken from elf32-m32r.c
876 There is some attempt to make this function usable for many architectures,
877 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
878 if only to serve as a learning tool.
879
880 The RELOCATE_SECTION function is called by the new ELF backend linker
881 to handle the relocations for a section.
882
883 The relocs are always passed as Rela structures; if the section
884 actually uses Rel structures, the r_addend field will always be
885 zero.
886
887 This function is responsible for adjust the section contents as
888 necessary, and (if using Rela relocs and generating a
889 relocatable output file) adjusting the reloc addend as
890 necessary.
891
892 This function does not have to worry about setting the reloc
893 address or the reloc symbol index.
894
895 LOCAL_SYMS is a pointer to the swapped in local symbols.
896
897 LOCAL_SECTIONS is an array giving the section in the input file
898 corresponding to the st_shndx field of each local symbol.
899
900 The global hash table entry for the global symbols can be found
901 via elf_sym_hashes (input_bfd).
902
903 When generating relocatable output, this function must handle
904 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
905 going to be the section symbol corresponding to the output
906 section, which means that the addend must be adjusted
907 accordingly. */
908
909 static bfd_boolean
910 microblaze_elf_relocate_section (bfd *output_bfd,
911 struct bfd_link_info *info,
912 bfd *input_bfd,
913 asection *input_section,
914 bfd_byte *contents,
915 Elf_Internal_Rela *relocs,
916 Elf_Internal_Sym *local_syms,
917 asection **local_sections)
918 {
919 struct elf32_mb_link_hash_table *htab;
920 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
921 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
922 Elf_Internal_Rela *rel, *relend;
923 int endian = (bfd_little_endian (output_bfd)) ? 0 : 2;
924 /* Assume success. */
925 bfd_boolean ret = TRUE;
926 asection *sreloc;
927 bfd_vma *local_got_offsets;
928 unsigned int tls_type;
929
930 if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1])
931 microblaze_elf_howto_init ();
932
933 htab = elf32_mb_hash_table (info);
934 if (htab == NULL)
935 return FALSE;
936
937 local_got_offsets = elf_local_got_offsets (input_bfd);
938
939 sreloc = elf_section_data (input_section)->sreloc;
940
941 rel = relocs;
942 relend = relocs + input_section->reloc_count;
943 for (; rel < relend; rel++)
944 {
945 int r_type;
946 reloc_howto_type *howto;
947 unsigned long r_symndx;
948 bfd_vma addend = rel->r_addend;
949 bfd_vma offset = rel->r_offset;
950 struct elf_link_hash_entry *h;
951 Elf_Internal_Sym *sym;
952 asection *sec;
953 const char *sym_name;
954 bfd_reloc_status_type r = bfd_reloc_ok;
955 const char *errmsg = NULL;
956 bfd_boolean unresolved_reloc = FALSE;
957
958 h = NULL;
959 r_type = ELF32_R_TYPE (rel->r_info);
960 tls_type = 0;
961
962 if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max)
963 {
964 /* xgettext:c-format */
965 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
966 input_bfd, (int) r_type);
967 bfd_set_error (bfd_error_bad_value);
968 ret = FALSE;
969 continue;
970 }
971
972 howto = microblaze_elf_howto_table[r_type];
973 r_symndx = ELF32_R_SYM (rel->r_info);
974
975 if (bfd_link_relocatable (info))
976 {
977 /* This is a relocatable link. We don't have to change
978 anything, unless the reloc is against a section symbol,
979 in which case we have to adjust according to where the
980 section symbol winds up in the output section. */
981 sec = NULL;
982 if (r_symndx >= symtab_hdr->sh_info)
983 /* External symbol. */
984 continue;
985
986 /* Local symbol. */
987 sym = local_syms + r_symndx;
988 sym_name = "<local symbol>";
989 /* STT_SECTION: symbol is associated with a section. */
990 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
991 /* Symbol isn't associated with a section. Nothing to do. */
992 continue;
993
994 sec = local_sections[r_symndx];
995 addend += sec->output_offset + sym->st_value;
996 #ifndef USE_REL
997 /* This can't be done for USE_REL because it doesn't mean anything
998 and elf_link_input_bfd asserts this stays zero. */
999 /* rel->r_addend = addend; */
1000 #endif
1001
1002 #ifndef USE_REL
1003 /* Addends are stored with relocs. We're done. */
1004 continue;
1005 #else /* USE_REL */
1006 /* If partial_inplace, we need to store any additional addend
1007 back in the section. */
1008 if (!howto->partial_inplace)
1009 continue;
1010 /* ??? Here is a nice place to call a special_function like handler. */
1011 r = _bfd_relocate_contents (howto, input_bfd, addend,
1012 contents + offset);
1013 #endif /* USE_REL */
1014 }
1015 else
1016 {
1017 bfd_vma relocation;
1018 bfd_boolean resolved_to_zero;
1019
1020 /* This is a final link. */
1021 sym = NULL;
1022 sec = NULL;
1023 unresolved_reloc = FALSE;
1024
1025 if (r_symndx < symtab_hdr->sh_info)
1026 {
1027 /* Local symbol. */
1028 sym = local_syms + r_symndx;
1029 sec = local_sections[r_symndx];
1030 if (sec == 0)
1031 continue;
1032 sym_name = "<local symbol>";
1033 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1034 /* r_addend may have changed if the reference section was
1035 a merge section. */
1036 addend = rel->r_addend;
1037 }
1038 else
1039 {
1040 /* External symbol. */
1041 bfd_boolean warned ATTRIBUTE_UNUSED;
1042 bfd_boolean ignored ATTRIBUTE_UNUSED;
1043
1044 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1045 r_symndx, symtab_hdr, sym_hashes,
1046 h, sec, relocation,
1047 unresolved_reloc, warned, ignored);
1048 sym_name = h->root.root.string;
1049 }
1050
1051 /* Sanity check the address. */
1052 if (offset > bfd_get_section_limit (input_bfd, input_section))
1053 {
1054 r = bfd_reloc_outofrange;
1055 goto check_reloc;
1056 }
1057
1058 resolved_to_zero = (h != NULL
1059 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
1060
1061 switch ((int) r_type)
1062 {
1063 case (int) R_MICROBLAZE_SRO32 :
1064 {
1065 const char *name;
1066
1067 /* Only relocate if the symbol is defined. */
1068 if (sec)
1069 {
1070 name = bfd_section_name (sec);
1071
1072 if (strcmp (name, ".sdata2") == 0
1073 || strcmp (name, ".sbss2") == 0)
1074 {
1075 if (ro_small_data_pointer == 0)
1076 microblaze_elf_final_sdp (info);
1077 if (ro_small_data_pointer == 0)
1078 {
1079 ret = FALSE;
1080 r = bfd_reloc_undefined;
1081 goto check_reloc;
1082 }
1083
1084 /* At this point `relocation' contains the object's
1085 address. */
1086 relocation -= ro_small_data_pointer;
1087 /* Now it contains the offset from _SDA2_BASE_. */
1088 r = _bfd_final_link_relocate (howto, input_bfd,
1089 input_section,
1090 contents, offset,
1091 relocation, addend);
1092 }
1093 else
1094 {
1095 _bfd_error_handler
1096 /* xgettext:c-format */
1097 (_("%pB: the target (%s) of an %s relocation"
1098 " is in the wrong section (%pA)"),
1099 input_bfd,
1100 sym_name,
1101 microblaze_elf_howto_table[(int) r_type]->name,
1102 sec);
1103 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1104 ret = FALSE;
1105 continue;
1106 }
1107 }
1108 }
1109 break;
1110
1111 case (int) R_MICROBLAZE_SRW32 :
1112 {
1113 const char *name;
1114
1115 /* Only relocate if the symbol is defined. */
1116 if (sec)
1117 {
1118 name = bfd_section_name (sec);
1119
1120 if (strcmp (name, ".sdata") == 0
1121 || strcmp (name, ".sbss") == 0)
1122 {
1123 if (rw_small_data_pointer == 0)
1124 microblaze_elf_final_sdp (info);
1125 if (rw_small_data_pointer == 0)
1126 {
1127 ret = FALSE;
1128 r = bfd_reloc_undefined;
1129 goto check_reloc;
1130 }
1131
1132 /* At this point `relocation' contains the object's
1133 address. */
1134 relocation -= rw_small_data_pointer;
1135 /* Now it contains the offset from _SDA_BASE_. */
1136 r = _bfd_final_link_relocate (howto, input_bfd,
1137 input_section,
1138 contents, offset,
1139 relocation, addend);
1140 }
1141 else
1142 {
1143 _bfd_error_handler
1144 /* xgettext:c-format */
1145 (_("%pB: the target (%s) of an %s relocation"
1146 " is in the wrong section (%pA)"),
1147 input_bfd,
1148 sym_name,
1149 microblaze_elf_howto_table[(int) r_type]->name,
1150 sec);
1151 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1152 ret = FALSE;
1153 continue;
1154 }
1155 }
1156 }
1157 break;
1158
1159 case (int) R_MICROBLAZE_32_SYM_OP_SYM:
1160 break; /* Do nothing. */
1161
1162 case (int) R_MICROBLAZE_GOTPC_64:
1163 relocation = (htab->elf.sgotplt->output_section->vma
1164 + htab->elf.sgotplt->output_offset);
1165 relocation -= (input_section->output_section->vma
1166 + input_section->output_offset
1167 + offset + INST_WORD_SIZE);
1168 relocation += addend;
1169 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1170 contents + offset + endian);
1171 bfd_put_16 (input_bfd, relocation & 0xffff,
1172 contents + offset + endian + INST_WORD_SIZE);
1173 break;
1174
1175 case (int) R_MICROBLAZE_TEXTPCREL_64:
1176 relocation = input_section->output_section->vma;
1177 relocation -= (input_section->output_section->vma
1178 + input_section->output_offset
1179 + offset + INST_WORD_SIZE);
1180 relocation += addend;
1181 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1182 contents + offset + endian);
1183 bfd_put_16 (input_bfd, relocation & 0xffff,
1184 contents + offset + endian + INST_WORD_SIZE);
1185 break;
1186
1187 case (int) R_MICROBLAZE_PLT_64:
1188 {
1189 bfd_vma immediate;
1190 if (htab->elf.splt != NULL && h != NULL
1191 && h->plt.offset != (bfd_vma) -1)
1192 {
1193 relocation = (htab->elf.splt->output_section->vma
1194 + htab->elf.splt->output_offset
1195 + h->plt.offset);
1196 unresolved_reloc = FALSE;
1197 immediate = relocation - (input_section->output_section->vma
1198 + input_section->output_offset
1199 + offset + INST_WORD_SIZE);
1200 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1201 contents + offset + endian);
1202 bfd_put_16 (input_bfd, immediate & 0xffff,
1203 contents + offset + endian + INST_WORD_SIZE);
1204 }
1205 else
1206 {
1207 relocation -= (input_section->output_section->vma
1208 + input_section->output_offset
1209 + offset + INST_WORD_SIZE);
1210 immediate = relocation;
1211 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1212 contents + offset + endian);
1213 bfd_put_16 (input_bfd, immediate & 0xffff,
1214 contents + offset + endian + INST_WORD_SIZE);
1215 }
1216 break;
1217 }
1218
1219 case (int) R_MICROBLAZE_TLSGD:
1220 tls_type = (TLS_TLS | TLS_GD);
1221 goto dogot;
1222 case (int) R_MICROBLAZE_TLSLD:
1223 tls_type = (TLS_TLS | TLS_LD);
1224 /* Fall through. */
1225 dogot:
1226 case (int) R_MICROBLAZE_GOT_64:
1227 {
1228 bfd_vma *offp;
1229 bfd_vma off, off2;
1230 unsigned long indx;
1231 bfd_vma static_value;
1232
1233 bfd_boolean need_relocs = FALSE;
1234 if (htab->elf.sgot == NULL)
1235 abort ();
1236
1237 indx = 0;
1238 offp = NULL;
1239
1240 /* 1. Identify GOT Offset;
1241 2. Compute Static Values
1242 3. Process Module Id, Process Offset
1243 4. Fixup Relocation with GOT offset value. */
1244
1245 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1246 if (IS_TLS_LD (tls_type))
1247 offp = &htab->tlsld_got.offset;
1248 else if (h != NULL)
1249 {
1250 if (htab->elf.sgotplt != NULL
1251 && h->got.offset != (bfd_vma) -1)
1252 offp = &h->got.offset;
1253 else
1254 abort ();
1255 }
1256 else
1257 {
1258 if (local_got_offsets == NULL)
1259 abort ();
1260 offp = &local_got_offsets[r_symndx];
1261 }
1262
1263 if (!offp)
1264 abort ();
1265
1266 off = (*offp) & ~1;
1267 off2 = off;
1268
1269 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type))
1270 off2 = off + 4;
1271
1272 /* Symbol index to use for relocs */
1273 if (h != NULL)
1274 {
1275 bfd_boolean dyn =
1276 elf_hash_table (info)->dynamic_sections_created;
1277
1278 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1279 bfd_link_pic (info),
1280 h)
1281 && (!bfd_link_pic (info)
1282 || !SYMBOL_REFERENCES_LOCAL (info, h)))
1283 indx = h->dynindx;
1284 }
1285
1286 /* Need to generate relocs ? */
1287 if ((bfd_link_pic (info) || indx != 0)
1288 && (h == NULL
1289 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1290 && !resolved_to_zero)
1291 || h->root.type != bfd_link_hash_undefweak))
1292 need_relocs = TRUE;
1293
1294 /* 2. Compute/Emit Static value of r-expression */
1295 static_value = relocation + addend;
1296
1297 /* 3. Process module-id and offset */
1298 if (! ((*offp) & 1) )
1299 {
1300 bfd_vma got_offset;
1301
1302 got_offset = (htab->elf.sgot->output_section->vma
1303 + htab->elf.sgot->output_offset
1304 + off);
1305
1306 /* Process module-id */
1307 if (IS_TLS_LD(tls_type))
1308 {
1309 if (! bfd_link_pic (info))
1310 bfd_put_32 (output_bfd, 1,
1311 htab->elf.sgot->contents + off);
1312 else
1313 microblaze_elf_output_dynamic_relocation
1314 (output_bfd,
1315 htab->elf.srelgot,
1316 htab->elf.srelgot->reloc_count++,
1317 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32,
1318 got_offset, 0);
1319 }
1320 else if (IS_TLS_GD(tls_type))
1321 {
1322 if (! need_relocs)
1323 bfd_put_32 (output_bfd, 1,
1324 htab->elf.sgot->contents + off);
1325 else
1326 microblaze_elf_output_dynamic_relocation
1327 (output_bfd,
1328 htab->elf.srelgot,
1329 htab->elf.srelgot->reloc_count++,
1330 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32,
1331 got_offset, indx ? 0 : static_value);
1332 }
1333
1334 /* Process Offset */
1335 if (htab->elf.srelgot == NULL)
1336 abort ();
1337
1338 got_offset = (htab->elf.sgot->output_section->vma
1339 + htab->elf.sgot->output_offset
1340 + off2);
1341 if (IS_TLS_LD(tls_type))
1342 {
1343 /* For LD, offset should be 0 */
1344 *offp |= 1;
1345 bfd_put_32 (output_bfd, 0,
1346 htab->elf.sgot->contents + off2);
1347 }
1348 else if (IS_TLS_GD(tls_type))
1349 {
1350 *offp |= 1;
1351 static_value -= dtprel_base(info);
1352 if (need_relocs)
1353 microblaze_elf_output_dynamic_relocation
1354 (output_bfd,
1355 htab->elf.srelgot,
1356 htab->elf.srelgot->reloc_count++,
1357 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32,
1358 got_offset, indx ? 0 : static_value);
1359 else
1360 bfd_put_32 (output_bfd, static_value,
1361 htab->elf.sgot->contents + off2);
1362 }
1363 else
1364 {
1365 bfd_put_32 (output_bfd, static_value,
1366 htab->elf.sgot->contents + off2);
1367
1368 /* Relocs for dyn symbols generated by
1369 finish_dynamic_symbols */
1370 if (bfd_link_pic (info) && h == NULL)
1371 {
1372 *offp |= 1;
1373 microblaze_elf_output_dynamic_relocation
1374 (output_bfd,
1375 htab->elf.srelgot,
1376 htab->elf.srelgot->reloc_count++,
1377 /* symindex= */ indx, R_MICROBLAZE_REL,
1378 got_offset, static_value);
1379 }
1380 }
1381 }
1382
1383 /* 4. Fixup Relocation with GOT offset value
1384 Compute relative address of GOT entry for applying
1385 the current relocation */
1386 relocation = htab->elf.sgot->output_section->vma
1387 + htab->elf.sgot->output_offset
1388 + off
1389 - htab->elf.sgotplt->output_section->vma
1390 - htab->elf.sgotplt->output_offset;
1391
1392 /* Apply Current Relocation */
1393 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1394 contents + offset + endian);
1395 bfd_put_16 (input_bfd, relocation & 0xffff,
1396 contents + offset + endian + INST_WORD_SIZE);
1397
1398 unresolved_reloc = FALSE;
1399 break;
1400 }
1401
1402 case (int) R_MICROBLAZE_GOTOFF_64:
1403 {
1404 bfd_vma immediate;
1405 unsigned short lo, high;
1406 relocation += addend;
1407 relocation -= (htab->elf.sgotplt->output_section->vma
1408 + htab->elf.sgotplt->output_offset);
1409 /* Write this value into correct location. */
1410 immediate = relocation;
1411 lo = immediate & 0x0000ffff;
1412 high = (immediate >> 16) & 0x0000ffff;
1413 bfd_put_16 (input_bfd, high, contents + offset + endian);
1414 bfd_put_16 (input_bfd, lo,
1415 contents + offset + INST_WORD_SIZE + endian);
1416 break;
1417 }
1418
1419 case (int) R_MICROBLAZE_GOTOFF_32:
1420 {
1421 relocation += addend;
1422 relocation -= (htab->elf.sgotplt->output_section->vma
1423 + htab->elf.sgotplt->output_offset);
1424 /* Write this value into correct location. */
1425 bfd_put_32 (input_bfd, relocation, contents + offset);
1426 break;
1427 }
1428
1429 case (int) R_MICROBLAZE_TLSDTPREL64:
1430 relocation += addend;
1431 relocation -= dtprel_base(info);
1432 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1433 contents + offset + 2);
1434 bfd_put_16 (input_bfd, relocation & 0xffff,
1435 contents + offset + 2 + INST_WORD_SIZE);
1436 break;
1437 case (int) R_MICROBLAZE_TEXTREL_64:
1438 case (int) R_MICROBLAZE_TEXTREL_32_LO:
1439 case (int) R_MICROBLAZE_64_PCREL :
1440 case (int) R_MICROBLAZE_64:
1441 case (int) R_MICROBLAZE_32:
1442 {
1443 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1444 from removed linkonce sections, or sections discarded by
1445 a linker script. */
1446 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0)
1447 {
1448 relocation += addend;
1449 if (r_type == R_MICROBLAZE_32)
1450 bfd_put_32 (input_bfd, relocation, contents + offset);
1451 else
1452 {
1453 if (r_type == R_MICROBLAZE_64_PCREL)
1454 relocation -= (input_section->output_section->vma
1455 + input_section->output_offset
1456 + offset + INST_WORD_SIZE);
1457 else if (r_type == R_MICROBLAZE_TEXTREL_64
1458 || r_type == R_MICROBLAZE_TEXTREL_32_LO)
1459 relocation -= input_section->output_section->vma;
1460
1461 if (r_type == R_MICROBLAZE_TEXTREL_32_LO)
1462 bfd_put_16 (input_bfd, relocation & 0xffff,
1463 contents + offset + endian);
1464
1465 else
1466 {
1467 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1468 contents + offset + endian);
1469 bfd_put_16 (input_bfd, relocation & 0xffff,
1470 contents + offset + endian + INST_WORD_SIZE);
1471 }
1472 }
1473 break;
1474 }
1475
1476 if ((bfd_link_pic (info)
1477 && (h == NULL
1478 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1479 && !resolved_to_zero)
1480 || h->root.type != bfd_link_hash_undefweak)
1481 && (!howto->pc_relative
1482 || (h != NULL
1483 && h->dynindx != -1
1484 && (!info->symbolic
1485 || !h->def_regular))))
1486 || (!bfd_link_pic (info)
1487 && h != NULL
1488 && h->dynindx != -1
1489 && !h->non_got_ref
1490 && ((h->def_dynamic
1491 && !h->def_regular)
1492 || h->root.type == bfd_link_hash_undefweak
1493 || h->root.type == bfd_link_hash_undefined)))
1494 {
1495 Elf_Internal_Rela outrel;
1496 bfd_byte *loc;
1497 bfd_boolean skip;
1498
1499 /* When generating a shared object, these relocations
1500 are copied into the output file to be resolved at run
1501 time. */
1502
1503 BFD_ASSERT (sreloc != NULL);
1504
1505 skip = FALSE;
1506
1507 outrel.r_offset =
1508 _bfd_elf_section_offset (output_bfd, info, input_section,
1509 rel->r_offset);
1510 if (outrel.r_offset == (bfd_vma) -1)
1511 skip = TRUE;
1512 else if (outrel.r_offset == (bfd_vma) -2)
1513 skip = TRUE;
1514 outrel.r_offset += (input_section->output_section->vma
1515 + input_section->output_offset);
1516
1517 if (skip)
1518 memset (&outrel, 0, sizeof outrel);
1519 /* h->dynindx may be -1 if the symbol was marked to
1520 become local. */
1521 else if (h != NULL
1522 && ((! info->symbolic && h->dynindx != -1)
1523 || !h->def_regular))
1524 {
1525 BFD_ASSERT (h->dynindx != -1);
1526 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1527 outrel.r_addend = addend;
1528 }
1529 else
1530 {
1531 if (r_type == R_MICROBLAZE_32)
1532 {
1533 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
1534 outrel.r_addend = relocation + addend;
1535 }
1536 else
1537 {
1538 BFD_FAIL ();
1539 _bfd_error_handler
1540 (_("%pB: probably compiled without -fPIC?"),
1541 input_bfd);
1542 bfd_set_error (bfd_error_bad_value);
1543 return FALSE;
1544 }
1545 }
1546
1547 loc = sreloc->contents;
1548 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1549 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1550 break;
1551 }
1552 else
1553 {
1554 relocation += addend;
1555 if (r_type == R_MICROBLAZE_32)
1556 bfd_put_32 (input_bfd, relocation, contents + offset);
1557 else
1558 {
1559 if (r_type == R_MICROBLAZE_64_PCREL)
1560 relocation -= (input_section->output_section->vma
1561 + input_section->output_offset
1562 + offset + INST_WORD_SIZE);
1563 else if (r_type == R_MICROBLAZE_TEXTREL_64
1564 || r_type == R_MICROBLAZE_TEXTREL_32_LO)
1565 relocation -= input_section->output_section->vma;
1566
1567 if (r_type == R_MICROBLAZE_TEXTREL_32_LO)
1568 {
1569 bfd_put_16 (input_bfd, relocation & 0xffff,
1570 contents + offset + endian);
1571 }
1572 else
1573 {
1574 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1575 contents + offset + endian);
1576 bfd_put_16 (input_bfd, relocation & 0xffff,
1577 contents + offset + endian
1578 + INST_WORD_SIZE);
1579 }
1580 }
1581 break;
1582 }
1583 }
1584
1585 default :
1586 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1587 contents, offset,
1588 relocation, addend);
1589 break;
1590 }
1591 }
1592
1593 check_reloc:
1594
1595 if (r != bfd_reloc_ok)
1596 {
1597 /* FIXME: This should be generic enough to go in a utility. */
1598 const char *name;
1599
1600 if (h != NULL)
1601 name = h->root.root.string;
1602 else
1603 {
1604 name = (bfd_elf_string_from_elf_section
1605 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1606 if (name == NULL || *name == '\0')
1607 name = bfd_section_name (sec);
1608 }
1609
1610 if (errmsg != NULL)
1611 goto common_error;
1612
1613 switch (r)
1614 {
1615 case bfd_reloc_overflow:
1616 (*info->callbacks->reloc_overflow)
1617 (info, (h ? &h->root : NULL), name, howto->name,
1618 (bfd_vma) 0, input_bfd, input_section, offset);
1619 break;
1620
1621 case bfd_reloc_undefined:
1622 (*info->callbacks->undefined_symbol)
1623 (info, name, input_bfd, input_section, offset, TRUE);
1624 break;
1625
1626 case bfd_reloc_outofrange:
1627 errmsg = _("internal error: out of range error");
1628 goto common_error;
1629
1630 case bfd_reloc_notsupported:
1631 errmsg = _("internal error: unsupported relocation error");
1632 goto common_error;
1633
1634 case bfd_reloc_dangerous:
1635 errmsg = _("internal error: dangerous error");
1636 goto common_error;
1637
1638 default:
1639 errmsg = _("internal error: unknown error");
1640 /* Fall through. */
1641 common_error:
1642 (*info->callbacks->warning) (info, errmsg, name, input_bfd,
1643 input_section, offset);
1644 break;
1645 }
1646 }
1647 }
1648
1649 return ret;
1650 }
1651 \f
1652 /* Calculate fixup value for reference. */
1653
1654 static int
1655 calc_fixup (bfd_vma start, bfd_vma size, asection *sec)
1656 {
1657 bfd_vma end = start + size;
1658 int i, fixup = 0;
1659
1660 if (sec == NULL || sec->relax == NULL)
1661 return 0;
1662
1663 /* Look for addr in relax table, total fixup value. */
1664 for (i = 0; i < sec->relax_count; i++)
1665 {
1666 if (end <= sec->relax[i].addr)
1667 break;
1668 if ((end != start) && (start > sec->relax[i].addr))
1669 continue;
1670 fixup += sec->relax[i].size;
1671 }
1672 return fixup;
1673 }
1674
1675 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1676 a 32-bit instruction. */
1677 static void
1678 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1679 {
1680 unsigned long instr = bfd_get_32 (abfd, bfd_addr);
1681 instr &= ~0x0000ffff;
1682 instr |= (val & 0x0000ffff);
1683 bfd_put_32 (abfd, instr, bfd_addr);
1684 }
1685
1686 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1687 two consecutive 32-bit instructions. */
1688 static void
1689 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1690 {
1691 unsigned long instr_hi;
1692 unsigned long instr_lo;
1693
1694 instr_hi = bfd_get_32 (abfd, bfd_addr);
1695 instr_hi &= ~0x0000ffff;
1696 instr_hi |= ((val >> 16) & 0x0000ffff);
1697 bfd_put_32 (abfd, instr_hi, bfd_addr);
1698
1699 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE);
1700 instr_lo &= ~0x0000ffff;
1701 instr_lo |= (val & 0x0000ffff);
1702 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE);
1703 }
1704
1705 static bfd_boolean
1706 microblaze_elf_relax_section (bfd *abfd,
1707 asection *sec,
1708 struct bfd_link_info *link_info,
1709 bfd_boolean *again)
1710 {
1711 Elf_Internal_Shdr *symtab_hdr;
1712 Elf_Internal_Rela *internal_relocs;
1713 Elf_Internal_Rela *free_relocs = NULL;
1714 Elf_Internal_Rela *irel, *irelend;
1715 bfd_byte *contents = NULL;
1716 bfd_byte *free_contents = NULL;
1717 int rel_count;
1718 unsigned int shndx;
1719 int i, sym_index;
1720 asection *o;
1721 struct elf_link_hash_entry *sym_hash;
1722 Elf_Internal_Sym *isymbuf, *isymend;
1723 Elf_Internal_Sym *isym;
1724 int symcount;
1725 int offset;
1726 bfd_vma src, dest;
1727
1728 /* We only do this once per section. We may be able to delete some code
1729 by running multiple passes, but it is not worth it. */
1730 *again = FALSE;
1731
1732 /* Only do this for a text section. */
1733 if (bfd_link_relocatable (link_info)
1734 || (sec->flags & SEC_RELOC) == 0
1735 || (sec->reloc_count == 0)
1736 || (sec->flags & SEC_CODE) == 0)
1737 return TRUE;
1738
1739 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
1740
1741 /* If this is the first time we have been called for this section,
1742 initialize the cooked size. */
1743 if (sec->size == 0)
1744 sec->size = sec->rawsize;
1745
1746 /* Get symbols for this section. */
1747 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1748 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1749 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
1750 if (isymbuf == NULL)
1751 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
1752 0, NULL, NULL, NULL);
1753 BFD_ASSERT (isymbuf != NULL);
1754
1755 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1756 if (internal_relocs == NULL)
1757 goto error_return;
1758 if (! link_info->keep_memory)
1759 free_relocs = internal_relocs;
1760
1761 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
1762 * sizeof (struct relax_table));
1763 if (sec->relax == NULL)
1764 goto error_return;
1765 sec->relax_count = 0;
1766
1767 irelend = internal_relocs + sec->reloc_count;
1768 rel_count = 0;
1769 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1770 {
1771 bfd_vma symval;
1772 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
1773 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64)
1774 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_TEXTREL_64))
1775 continue; /* Can't delete this reloc. */
1776
1777 /* Get the section contents. */
1778 if (contents == NULL)
1779 {
1780 if (elf_section_data (sec)->this_hdr.contents != NULL)
1781 contents = elf_section_data (sec)->this_hdr.contents;
1782 else
1783 {
1784 contents = (bfd_byte *) bfd_malloc (sec->size);
1785 if (contents == NULL)
1786 goto error_return;
1787 free_contents = contents;
1788
1789 if (!bfd_get_section_contents (abfd, sec, contents,
1790 (file_ptr) 0, sec->size))
1791 goto error_return;
1792 elf_section_data (sec)->this_hdr.contents = contents;
1793 }
1794 }
1795
1796 /* Get the value of the symbol referred to by the reloc. */
1797 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1798 {
1799 /* A local symbol. */
1800 asection *sym_sec;
1801
1802 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1803 if (isym->st_shndx == SHN_UNDEF)
1804 sym_sec = bfd_und_section_ptr;
1805 else if (isym->st_shndx == SHN_ABS)
1806 sym_sec = bfd_abs_section_ptr;
1807 else if (isym->st_shndx == SHN_COMMON)
1808 sym_sec = bfd_com_section_ptr;
1809 else
1810 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1811
1812 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
1813 }
1814 else
1815 {
1816 unsigned long indx;
1817 struct elf_link_hash_entry *h;
1818
1819 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1820 h = elf_sym_hashes (abfd)[indx];
1821 BFD_ASSERT (h != NULL);
1822
1823 if (h->root.type != bfd_link_hash_defined
1824 && h->root.type != bfd_link_hash_defweak)
1825 /* This appears to be a reference to an undefined
1826 symbol. Just ignore it--it will be caught by the
1827 regular reloc processing. */
1828 continue;
1829
1830 symval = (h->root.u.def.value
1831 + h->root.u.def.section->output_section->vma
1832 + h->root.u.def.section->output_offset);
1833 }
1834
1835 /* If this is a PC-relative reloc, subtract the instr offset from
1836 the symbol value. */
1837 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
1838 {
1839 symval = symval + irel->r_addend
1840 - (irel->r_offset
1841 + sec->output_section->vma
1842 + sec->output_offset);
1843 }
1844 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_TEXTREL_64)
1845 {
1846 symval = symval + irel->r_addend - (sec->output_section->vma);
1847 }
1848 else
1849 symval += irel->r_addend;
1850
1851 if ((symval & 0xffff8000) == 0
1852 || (symval & 0xffff8000) == 0xffff8000)
1853 {
1854 /* We can delete this instruction. */
1855 sec->relax[sec->relax_count].addr = irel->r_offset;
1856 sec->relax[sec->relax_count].size = INST_WORD_SIZE;
1857 sec->relax_count++;
1858
1859 /* Rewrite relocation type. */
1860 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1861 {
1862 case R_MICROBLAZE_64_PCREL:
1863 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1864 (int) R_MICROBLAZE_32_PCREL_LO);
1865 break;
1866 case R_MICROBLAZE_64:
1867 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1868 (int) R_MICROBLAZE_32_LO);
1869 break;
1870 case R_MICROBLAZE_TEXTREL_64:
1871 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1872 (int) R_MICROBLAZE_TEXTREL_32_LO);
1873 break;
1874 default:
1875 /* Cannot happen. */
1876 BFD_ASSERT (FALSE);
1877 }
1878 }
1879 } /* Loop through all relocations. */
1880
1881 /* Loop through the relocs again, and see if anything needs to change. */
1882 if (sec->relax_count > 0)
1883 {
1884 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1885 rel_count = 0;
1886 sec->relax[sec->relax_count].addr = sec->size;
1887
1888 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1889 {
1890 bfd_vma nraddr;
1891
1892 /* Get the new reloc address. */
1893 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec);
1894 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1895 {
1896 default:
1897 break;
1898 case R_MICROBLAZE_64_PCREL:
1899 break;
1900 case R_MICROBLAZE_TEXTREL_64:
1901 case R_MICROBLAZE_TEXTREL_32_LO:
1902 case R_MICROBLAZE_64:
1903 case R_MICROBLAZE_32_LO:
1904 /* If this reloc is against a symbol defined in this
1905 section, we must check the addend to see it will put the value in
1906 range to be adjusted, and hence must be changed. */
1907 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1908 {
1909 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1910 /* Only handle relocs against .text. */
1911 if (isym->st_shndx == shndx
1912 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
1913 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec);
1914 }
1915 break;
1916 case R_MICROBLAZE_NONE:
1917 {
1918 /* This was a PC-relative instruction that was
1919 completely resolved. */
1920 int sfix, efix;
1921 bfd_vma target_address;
1922 target_address = irel->r_addend + irel->r_offset;
1923 sfix = calc_fixup (irel->r_offset, 0, sec);
1924 efix = calc_fixup (target_address, 0, sec);
1925 irel->r_addend -= (efix - sfix);
1926 /* Should use HOWTO. */
1927 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset,
1928 irel->r_addend);
1929 }
1930 break;
1931 case R_MICROBLAZE_64_NONE:
1932 {
1933 /* This was a PC-relative 64-bit instruction that was
1934 completely resolved. */
1935 int sfix, efix;
1936 bfd_vma target_address;
1937 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
1938 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec);
1939 efix = calc_fixup (target_address, 0, sec);
1940 irel->r_addend -= (efix - sfix);
1941 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset
1942 + INST_WORD_SIZE, irel->r_addend);
1943 }
1944 break;
1945 }
1946 irel->r_offset = nraddr;
1947 } /* Change all relocs in this section. */
1948
1949 /* Look through all other sections. */
1950 for (o = abfd->sections; o != NULL; o = o->next)
1951 {
1952 Elf_Internal_Rela *irelocs;
1953 Elf_Internal_Rela *irelscan, *irelscanend;
1954 bfd_byte *ocontents;
1955
1956 if (o == sec
1957 || (o->flags & SEC_RELOC) == 0
1958 || o->reloc_count == 0)
1959 continue;
1960
1961 /* We always cache the relocs. Perhaps, if info->keep_memory is
1962 FALSE, we should free them, if we are permitted to. */
1963
1964 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
1965 if (irelocs == NULL)
1966 goto error_return;
1967
1968 ocontents = NULL;
1969 irelscanend = irelocs + o->reloc_count;
1970 for (irelscan = irelocs; irelscan < irelscanend; irelscan++)
1971 {
1972 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
1973 {
1974 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1975
1976 /* Look at the reloc only if the value has been resolved. */
1977 if (isym->st_shndx == shndx
1978 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1979 {
1980 if (ocontents == NULL)
1981 {
1982 if (elf_section_data (o)->this_hdr.contents != NULL)
1983 ocontents = elf_section_data (o)->this_hdr.contents;
1984 else
1985 {
1986 /* We always cache the section contents.
1987 Perhaps, if info->keep_memory is FALSE, we
1988 should free them, if we are permitted to. */
1989 if (o->rawsize == 0)
1990 o->rawsize = o->size;
1991 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1992 if (ocontents == NULL)
1993 goto error_return;
1994 if (!bfd_get_section_contents (abfd, o, ocontents,
1995 (file_ptr) 0,
1996 o->rawsize))
1997 goto error_return;
1998 elf_section_data (o)->this_hdr.contents = ocontents;
1999 }
2000
2001 }
2002 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec);
2003 }
2004 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
2005 {
2006 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2007
2008 /* Look at the reloc only if the value has been resolved. */
2009 if (ocontents == NULL)
2010 {
2011 if (elf_section_data (o)->this_hdr.contents != NULL)
2012 ocontents = elf_section_data (o)->this_hdr.contents;
2013 else
2014 {
2015 /* We always cache the section contents.
2016 Perhaps, if info->keep_memory is FALSE, we
2017 should free them, if we are permitted to. */
2018
2019 if (o->rawsize == 0)
2020 o->rawsize = o->size;
2021 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2022 if (ocontents == NULL)
2023 goto error_return;
2024 if (!bfd_get_section_contents (abfd, o, ocontents,
2025 (file_ptr) 0,
2026 o->rawsize))
2027 goto error_return;
2028 elf_section_data (o)->this_hdr.contents = ocontents;
2029 }
2030 }
2031 irelscan->r_addend -= calc_fixup (irel->r_addend
2032 + isym->st_value,
2033 0,
2034 sec);
2035 }
2036 }
2037 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
2038 || (ELF32_R_TYPE (irelscan->r_info)
2039 == (int) R_MICROBLAZE_32_LO)
2040 || (ELF32_R_TYPE (irelscan->r_info)
2041 == (int) R_MICROBLAZE_TEXTREL_32_LO))
2042 {
2043 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2044
2045 /* Look at the reloc only if the value has been resolved. */
2046 if (isym->st_shndx == shndx
2047 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2048 {
2049 bfd_vma immediate;
2050 bfd_vma target_address;
2051
2052 if (ocontents == NULL)
2053 {
2054 if (elf_section_data (o)->this_hdr.contents != NULL)
2055 ocontents = elf_section_data (o)->this_hdr.contents;
2056 else
2057 {
2058 /* We always cache the section contents.
2059 Perhaps, if info->keep_memory is FALSE, we
2060 should free them, if we are permitted to. */
2061 if (o->rawsize == 0)
2062 o->rawsize = o->size;
2063 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2064 if (ocontents == NULL)
2065 goto error_return;
2066 if (!bfd_get_section_contents (abfd, o, ocontents,
2067 (file_ptr) 0,
2068 o->rawsize))
2069 goto error_return;
2070 elf_section_data (o)->this_hdr.contents = ocontents;
2071 }
2072 }
2073
2074 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
2075 immediate = instr & 0x0000ffff;
2076 target_address = immediate;
2077 offset = calc_fixup (target_address, 0, sec);
2078 immediate -= offset;
2079 irelscan->r_addend -= offset;
2080 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset,
2081 irelscan->r_addend);
2082 }
2083 }
2084
2085 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64
2086 || (ELF32_R_TYPE (irelscan->r_info)
2087 == (int) R_MICROBLAZE_TEXTREL_64))
2088 {
2089 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2090
2091 /* Look at the reloc only if the value has been resolved. */
2092 if (isym->st_shndx == shndx
2093 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2094 {
2095 bfd_vma immediate;
2096
2097 if (ocontents == NULL)
2098 {
2099 if (elf_section_data (o)->this_hdr.contents != NULL)
2100 ocontents = elf_section_data (o)->this_hdr.contents;
2101 else
2102 {
2103 /* We always cache the section contents.
2104 Perhaps, if info->keep_memory is FALSE, we
2105 should free them, if we are permitted to. */
2106
2107 if (o->rawsize == 0)
2108 o->rawsize = o->size;
2109 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2110 if (ocontents == NULL)
2111 goto error_return;
2112 if (!bfd_get_section_contents (abfd, o, ocontents,
2113 (file_ptr) 0,
2114 o->rawsize))
2115 goto error_return;
2116 elf_section_data (o)->this_hdr.contents = ocontents;
2117 }
2118 }
2119 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2120 + irelscan->r_offset);
2121 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2122 + irelscan->r_offset
2123 + INST_WORD_SIZE);
2124 immediate = (instr_hi & 0x0000ffff) << 16;
2125 immediate |= (instr_lo & 0x0000ffff);
2126 offset = calc_fixup (irelscan->r_addend, 0, sec);
2127 immediate -= offset;
2128 irelscan->r_addend -= offset;
2129 }
2130 }
2131 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
2132 {
2133 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2134
2135 /* Look at the reloc only if the value has been resolved. */
2136 if (isym->st_shndx == shndx
2137 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2138 {
2139 bfd_vma immediate;
2140 bfd_vma target_address;
2141
2142 if (ocontents == NULL)
2143 {
2144 if (elf_section_data (o)->this_hdr.contents != NULL)
2145 ocontents = elf_section_data (o)->this_hdr.contents;
2146 else
2147 {
2148 /* We always cache the section contents.
2149 Perhaps, if info->keep_memory is FALSE, we
2150 should free them, if we are permitted to. */
2151 if (o->rawsize == 0)
2152 o->rawsize = o->size;
2153 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2154 if (ocontents == NULL)
2155 goto error_return;
2156 if (!bfd_get_section_contents (abfd, o, ocontents,
2157 (file_ptr) 0,
2158 o->rawsize))
2159 goto error_return;
2160 elf_section_data (o)->this_hdr.contents = ocontents;
2161 }
2162 }
2163 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2164 + irelscan->r_offset);
2165 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2166 + irelscan->r_offset
2167 + INST_WORD_SIZE);
2168 immediate = (instr_hi & 0x0000ffff) << 16;
2169 immediate |= (instr_lo & 0x0000ffff);
2170 target_address = immediate;
2171 offset = calc_fixup (target_address, 0, sec);
2172 immediate -= offset;
2173 irelscan->r_addend -= offset;
2174 microblaze_bfd_write_imm_value_64 (abfd, ocontents
2175 + irelscan->r_offset, immediate);
2176 }
2177 }
2178 }
2179 }
2180
2181 /* Adjust the local symbols defined in this section. */
2182 isymend = isymbuf + symtab_hdr->sh_info;
2183 for (isym = isymbuf; isym < isymend; isym++)
2184 {
2185 if (isym->st_shndx == shndx)
2186 {
2187 isym->st_value -= calc_fixup (isym->st_value, 0, sec);
2188 if (isym->st_size)
2189 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec);
2190 }
2191 }
2192
2193 /* Now adjust the global symbols defined in this section. */
2194 isym = isymbuf + symtab_hdr->sh_info;
2195 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info;
2196 for (sym_index = 0; sym_index < symcount; sym_index++)
2197 {
2198 sym_hash = elf_sym_hashes (abfd)[sym_index];
2199 if ((sym_hash->root.type == bfd_link_hash_defined
2200 || sym_hash->root.type == bfd_link_hash_defweak)
2201 && sym_hash->root.u.def.section == sec)
2202 {
2203 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
2204 0, sec);
2205 if (sym_hash->size)
2206 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value,
2207 sym_hash->size, sec);
2208 }
2209 }
2210
2211 /* Physically move the code and change the cooked size. */
2212 dest = sec->relax[0].addr;
2213 for (i = 0; i < sec->relax_count; i++)
2214 {
2215 int len;
2216 src = sec->relax[i].addr + sec->relax[i].size;
2217 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
2218
2219 memmove (contents + dest, contents + src, len);
2220 sec->size -= sec->relax[i].size;
2221 dest += len;
2222 }
2223
2224 elf_section_data (sec)->relocs = internal_relocs;
2225 free_relocs = NULL;
2226
2227 elf_section_data (sec)->this_hdr.contents = contents;
2228 free_contents = NULL;
2229
2230 symtab_hdr->contents = (bfd_byte *) isymbuf;
2231 }
2232
2233 free (free_relocs);
2234 free_relocs = NULL;
2235
2236 if (free_contents != NULL)
2237 {
2238 if (!link_info->keep_memory)
2239 free (free_contents);
2240 else
2241 /* Cache the section contents for elf_link_input_bfd. */
2242 elf_section_data (sec)->this_hdr.contents = contents;
2243 free_contents = NULL;
2244 }
2245
2246 if (sec->relax_count == 0)
2247 {
2248 *again = FALSE;
2249 free (sec->relax);
2250 sec->relax = NULL;
2251 }
2252 else
2253 *again = TRUE;
2254 return TRUE;
2255
2256 error_return:
2257 free (free_relocs);
2258 free (free_contents);
2259 free (sec->relax);
2260 sec->relax = NULL;
2261 sec->relax_count = 0;
2262 return FALSE;
2263 }
2264
2265 /* Return the section that should be marked against GC for a given
2266 relocation. */
2267
2268 static asection *
2269 microblaze_elf_gc_mark_hook (asection *sec,
2270 struct bfd_link_info * info,
2271 Elf_Internal_Rela * rel,
2272 struct elf_link_hash_entry * h,
2273 Elf_Internal_Sym * sym)
2274 {
2275 if (h != NULL)
2276 switch (ELF32_R_TYPE (rel->r_info))
2277 {
2278 case R_MICROBLAZE_GNU_VTINHERIT:
2279 case R_MICROBLAZE_GNU_VTENTRY:
2280 return NULL;
2281 }
2282
2283 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2284 }
2285
2286 /* PIC support. */
2287
2288 #define PLT_ENTRY_SIZE 16
2289
2290 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2291 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2292 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2293 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2294 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2295
2296 static bfd_boolean
2297 update_local_sym_info (bfd *abfd,
2298 Elf_Internal_Shdr *symtab_hdr,
2299 unsigned long r_symndx,
2300 unsigned int tls_type)
2301 {
2302 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2303 unsigned char *local_got_tls_masks;
2304
2305 if (local_got_refcounts == NULL)
2306 {
2307 bfd_size_type size = symtab_hdr->sh_info;
2308
2309 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks));
2310 local_got_refcounts = bfd_zalloc (abfd, size);
2311 if (local_got_refcounts == NULL)
2312 return FALSE;
2313 elf_local_got_refcounts (abfd) = local_got_refcounts;
2314 }
2315
2316 local_got_tls_masks =
2317 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info);
2318 local_got_tls_masks[r_symndx] |= tls_type;
2319 local_got_refcounts[r_symndx] += 1;
2320
2321 return TRUE;
2322 }
2323 /* Look through the relocs for a section during the first phase. */
2324
2325 static bfd_boolean
2326 microblaze_elf_check_relocs (bfd * abfd,
2327 struct bfd_link_info * info,
2328 asection * sec,
2329 const Elf_Internal_Rela * relocs)
2330 {
2331 Elf_Internal_Shdr * symtab_hdr;
2332 struct elf_link_hash_entry ** sym_hashes;
2333 struct elf_link_hash_entry ** sym_hashes_end;
2334 const Elf_Internal_Rela * rel;
2335 const Elf_Internal_Rela * rel_end;
2336 struct elf32_mb_link_hash_table *htab;
2337 asection *sreloc = NULL;
2338
2339 if (bfd_link_relocatable (info))
2340 return TRUE;
2341
2342 htab = elf32_mb_hash_table (info);
2343 if (htab == NULL)
2344 return FALSE;
2345
2346 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2347 sym_hashes = elf_sym_hashes (abfd);
2348 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2349 if (!elf_bad_symtab (abfd))
2350 sym_hashes_end -= symtab_hdr->sh_info;
2351
2352 rel_end = relocs + sec->reloc_count;
2353
2354 for (rel = relocs; rel < rel_end; rel++)
2355 {
2356 unsigned int r_type;
2357 struct elf_link_hash_entry * h;
2358 unsigned long r_symndx;
2359 unsigned char tls_type = 0;
2360
2361 r_symndx = ELF32_R_SYM (rel->r_info);
2362 r_type = ELF32_R_TYPE (rel->r_info);
2363
2364 if (r_symndx < symtab_hdr->sh_info)
2365 h = NULL;
2366 else
2367 {
2368 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2369 while (h->root.type == bfd_link_hash_indirect
2370 || h->root.type == bfd_link_hash_warning)
2371 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2372 }
2373
2374 switch (r_type)
2375 {
2376 /* This relocation describes the C++ object vtable hierarchy.
2377 Reconstruct it for later use during GC. */
2378 case R_MICROBLAZE_GNU_VTINHERIT:
2379 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2380 return FALSE;
2381 break;
2382
2383 /* This relocation describes which C++ vtable entries are actually
2384 used. Record for later use during GC. */
2385 case R_MICROBLAZE_GNU_VTENTRY:
2386 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2387 return FALSE;
2388 break;
2389
2390 /* This relocation requires .plt entry. */
2391 case R_MICROBLAZE_PLT_64:
2392 if (h != NULL)
2393 {
2394 h->needs_plt = 1;
2395 h->plt.refcount += 1;
2396 }
2397 break;
2398
2399 /* This relocation requires .got entry. */
2400 case R_MICROBLAZE_TLSGD:
2401 tls_type |= (TLS_TLS | TLS_GD);
2402 goto dogottls;
2403 case R_MICROBLAZE_TLSLD:
2404 tls_type |= (TLS_TLS | TLS_LD);
2405 /* Fall through. */
2406 dogottls:
2407 sec->has_tls_reloc = 1;
2408 /* Fall through. */
2409 case R_MICROBLAZE_GOT_64:
2410 if (htab->elf.sgot == NULL)
2411 {
2412 if (htab->elf.dynobj == NULL)
2413 htab->elf.dynobj = abfd;
2414 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
2415 return FALSE;
2416 }
2417 if (h != NULL)
2418 {
2419 h->got.refcount += 1;
2420 elf32_mb_hash_entry (h)->tls_mask |= tls_type;
2421 }
2422 else
2423 {
2424 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) )
2425 return FALSE;
2426 }
2427 break;
2428
2429 case R_MICROBLAZE_GOTOFF_64:
2430 case R_MICROBLAZE_GOTOFF_32:
2431 if (htab->elf.sgot == NULL)
2432 {
2433 if (htab->elf.dynobj == NULL)
2434 htab->elf.dynobj = abfd;
2435 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
2436 return FALSE;
2437 }
2438 break;
2439
2440 case R_MICROBLAZE_64:
2441 case R_MICROBLAZE_64_PCREL:
2442 case R_MICROBLAZE_32:
2443 {
2444 if (h != NULL && !bfd_link_pic (info))
2445 {
2446 /* we may need a copy reloc. */
2447 h->non_got_ref = 1;
2448
2449 /* we may also need a .plt entry. */
2450 h->plt.refcount += 1;
2451 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
2452 h->pointer_equality_needed = 1;
2453 }
2454
2455
2456 /* If we are creating a shared library, and this is a reloc
2457 against a global symbol, or a non PC relative reloc
2458 against a local symbol, then we need to copy the reloc
2459 into the shared library. However, if we are linking with
2460 -Bsymbolic, we do not need to copy a reloc against a
2461 global symbol which is defined in an object we are
2462 including in the link (i.e., DEF_REGULAR is set). At
2463 this point we have not seen all the input files, so it is
2464 possible that DEF_REGULAR is not set now but will be set
2465 later (it is never cleared). In case of a weak definition,
2466 DEF_REGULAR may be cleared later by a strong definition in
2467 a shared library. We account for that possibility below by
2468 storing information in the relocs_copied field of the hash
2469 table entry. A similar situation occurs when creating
2470 shared libraries and symbol visibility changes render the
2471 symbol local.
2472
2473 If on the other hand, we are creating an executable, we
2474 may need to keep relocations for symbols satisfied by a
2475 dynamic library if we manage to avoid copy relocs for the
2476 symbol. */
2477
2478 if ((bfd_link_pic (info)
2479 && (sec->flags & SEC_ALLOC) != 0
2480 && (r_type != R_MICROBLAZE_64_PCREL
2481 || (h != NULL
2482 && (! info->symbolic
2483 || h->root.type == bfd_link_hash_defweak
2484 || !h->def_regular))))
2485 || (!bfd_link_pic (info)
2486 && (sec->flags & SEC_ALLOC) != 0
2487 && h != NULL
2488 && (h->root.type == bfd_link_hash_defweak
2489 || !h->def_regular)))
2490 {
2491 struct elf_dyn_relocs *p;
2492 struct elf_dyn_relocs **head;
2493
2494 /* When creating a shared object, we must copy these
2495 relocs into the output file. We create a reloc
2496 section in dynobj and make room for the reloc. */
2497
2498 if (sreloc == NULL)
2499 {
2500 bfd *dynobj;
2501
2502 if (htab->elf.dynobj == NULL)
2503 htab->elf.dynobj = abfd;
2504 dynobj = htab->elf.dynobj;
2505
2506 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj,
2507 2, abfd, 1);
2508 if (sreloc == NULL)
2509 return FALSE;
2510 }
2511
2512 /* If this is a global symbol, we count the number of
2513 relocations we need for this symbol. */
2514 if (h != NULL)
2515 head = &h->dyn_relocs;
2516 else
2517 {
2518 /* Track dynamic relocs needed for local syms too.
2519 We really need local syms available to do this
2520 easily. Oh well. */
2521
2522 asection *s;
2523 Elf_Internal_Sym *isym;
2524 void *vpp;
2525
2526 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
2527 abfd, r_symndx);
2528 if (isym == NULL)
2529 return FALSE;
2530
2531 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2532 if (s == NULL)
2533 return FALSE;
2534
2535 vpp = &elf_section_data (s)->local_dynrel;
2536 head = (struct elf_dyn_relocs **) vpp;
2537 }
2538
2539 p = *head;
2540 if (p == NULL || p->sec != sec)
2541 {
2542 size_t amt = sizeof *p;
2543 p = ((struct elf_dyn_relocs *)
2544 bfd_alloc (htab->elf.dynobj, amt));
2545 if (p == NULL)
2546 return FALSE;
2547 p->next = *head;
2548 *head = p;
2549 p->sec = sec;
2550 p->count = 0;
2551 p->pc_count = 0;
2552 }
2553
2554 p->count += 1;
2555 if (r_type == R_MICROBLAZE_64_PCREL)
2556 p->pc_count += 1;
2557 }
2558 }
2559 break;
2560 }
2561 }
2562
2563 return TRUE;
2564 }
2565
2566 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2567
2568 static void
2569 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
2570 struct elf_link_hash_entry *dir,
2571 struct elf_link_hash_entry *ind)
2572 {
2573 struct elf32_mb_link_hash_entry *edir, *eind;
2574
2575 edir = (struct elf32_mb_link_hash_entry *) dir;
2576 eind = (struct elf32_mb_link_hash_entry *) ind;
2577
2578 edir->tls_mask |= eind->tls_mask;
2579
2580 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2581 }
2582
2583 static bfd_boolean
2584 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2585 struct elf_link_hash_entry *h)
2586 {
2587 struct elf32_mb_link_hash_table *htab;
2588 asection *s, *srel;
2589 unsigned int power_of_two;
2590
2591 htab = elf32_mb_hash_table (info);
2592 if (htab == NULL)
2593 return FALSE;
2594
2595 /* If this is a function, put it in the procedure linkage table. We
2596 will fill in the contents of the procedure linkage table later,
2597 when we know the address of the .got section. */
2598 if (h->type == STT_FUNC
2599 || h->needs_plt)
2600 {
2601 if (h->plt.refcount <= 0
2602 || SYMBOL_CALLS_LOCAL (info, h)
2603 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2604 && h->root.type == bfd_link_hash_undefweak))
2605 {
2606 /* This case can occur if we saw a PLT reloc in an input
2607 file, but the symbol was never referred to by a dynamic
2608 object, or if all references were garbage collected. In
2609 such a case, we don't actually need to build a procedure
2610 linkage table, and we can just do a PC32 reloc instead. */
2611 h->plt.offset = (bfd_vma) -1;
2612 h->needs_plt = 0;
2613 }
2614
2615 return TRUE;
2616 }
2617 else
2618 /* It's possible that we incorrectly decided a .plt reloc was
2619 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2620 check_relocs. We can't decide accurately between function and
2621 non-function syms in check-relocs; Objects loaded later in
2622 the link may change h->type. So fix it now. */
2623 h->plt.offset = (bfd_vma) -1;
2624
2625 /* If this is a weak symbol, and there is a real definition, the
2626 processor independent code will have arranged for us to see the
2627 real definition first, and we can just use the same value. */
2628 if (h->is_weakalias)
2629 {
2630 struct elf_link_hash_entry *def = weakdef (h);
2631 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2632 h->root.u.def.section = def->root.u.def.section;
2633 h->root.u.def.value = def->root.u.def.value;
2634 return TRUE;
2635 }
2636
2637 /* This is a reference to a symbol defined by a dynamic object which
2638 is not a function. */
2639
2640 /* If we are creating a shared library, we must presume that the
2641 only references to the symbol are via the global offset table.
2642 For such cases we need not do anything here; the relocations will
2643 be handled correctly by relocate_section. */
2644 if (bfd_link_pic (info))
2645 return TRUE;
2646
2647 /* If there are no references to this symbol that do not use the
2648 GOT, we don't need to generate a copy reloc. */
2649 if (!h->non_got_ref)
2650 return TRUE;
2651
2652 /* If -z nocopyreloc was given, we won't generate them either. */
2653 if (info->nocopyreloc)
2654 {
2655 h->non_got_ref = 0;
2656 return TRUE;
2657 }
2658
2659 /* If we don't find any dynamic relocs in read-only sections, then
2660 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2661 if (!_bfd_elf_readonly_dynrelocs (h))
2662 {
2663 h->non_got_ref = 0;
2664 return TRUE;
2665 }
2666
2667 /* We must allocate the symbol in our .dynbss section, which will
2668 become part of the .bss section of the executable. There will be
2669 an entry for this symbol in the .dynsym section. The dynamic
2670 object will contain position independent code, so all references
2671 from the dynamic object to this symbol will go through the global
2672 offset table. The dynamic linker will use the .dynsym entry to
2673 determine the address it must put in the global offset table, so
2674 both the dynamic object and the regular object will refer to the
2675 same memory location for the variable. */
2676
2677 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2678 to copy the initial value out of the dynamic object and into the
2679 runtime process image. */
2680 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2681 {
2682 s = htab->elf.sdynrelro;
2683 srel = htab->elf.sreldynrelro;
2684 }
2685 else
2686 {
2687 s = htab->elf.sdynbss;
2688 srel = htab->elf.srelbss;
2689 }
2690 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2691 {
2692 srel->size += sizeof (Elf32_External_Rela);
2693 h->needs_copy = 1;
2694 }
2695
2696 /* We need to figure out the alignment required for this symbol. I
2697 have no idea how ELF linkers handle this. */
2698 power_of_two = bfd_log2 (h->size);
2699 if (power_of_two > 3)
2700 power_of_two = 3;
2701
2702 /* Apply the required alignment. */
2703 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2704 if (power_of_two > s->alignment_power)
2705 {
2706 if (!bfd_set_section_alignment (s, power_of_two))
2707 return FALSE;
2708 }
2709
2710 /* Define the symbol as being at this point in the section. */
2711 h->root.u.def.section = s;
2712 h->root.u.def.value = s->size;
2713
2714 /* Increment the section size to make room for the symbol. */
2715 s->size += h->size;
2716 return TRUE;
2717 }
2718
2719 /* Allocate space in .plt, .got and associated reloc sections for
2720 dynamic relocs. */
2721
2722 static bfd_boolean
2723 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
2724 {
2725 struct bfd_link_info *info;
2726 struct elf32_mb_link_hash_table *htab;
2727 struct elf32_mb_link_hash_entry *eh;
2728 struct elf_dyn_relocs *p;
2729
2730 if (h->root.type == bfd_link_hash_indirect)
2731 return TRUE;
2732
2733 info = (struct bfd_link_info *) dat;
2734 htab = elf32_mb_hash_table (info);
2735 if (htab == NULL)
2736 return FALSE;
2737
2738 if (htab->elf.dynamic_sections_created
2739 && h->plt.refcount > 0)
2740 {
2741 /* Make sure this symbol is output as a dynamic symbol.
2742 Undefined weak syms won't yet be marked as dynamic. */
2743 if (h->dynindx == -1
2744 && !h->forced_local)
2745 {
2746 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2747 return FALSE;
2748 }
2749
2750 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
2751 {
2752 asection *s = htab->elf.splt;
2753
2754 /* The first entry in .plt is reserved. */
2755 if (s->size == 0)
2756 s->size = PLT_ENTRY_SIZE;
2757
2758 h->plt.offset = s->size;
2759
2760 /* If this symbol is not defined in a regular file, and we are
2761 not generating a shared library, then set the symbol to this
2762 location in the .plt. This is required to make function
2763 pointers compare as equal between the normal executable and
2764 the shared library. */
2765 if (! bfd_link_pic (info)
2766 && !h->def_regular)
2767 {
2768 h->root.u.def.section = s;
2769 h->root.u.def.value = h->plt.offset;
2770 }
2771
2772 /* Make room for this entry. */
2773 s->size += PLT_ENTRY_SIZE;
2774
2775 /* We also need to make an entry in the .got.plt section, which
2776 will be placed in the .got section by the linker script. */
2777 htab->elf.sgotplt->size += 4;
2778
2779 /* We also need to make an entry in the .rel.plt section. */
2780 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
2781 }
2782 else
2783 {
2784 h->plt.offset = (bfd_vma) -1;
2785 h->needs_plt = 0;
2786 }
2787 }
2788 else
2789 {
2790 h->plt.offset = (bfd_vma) -1;
2791 h->needs_plt = 0;
2792 }
2793
2794 eh = (struct elf32_mb_link_hash_entry *) h;
2795 if (h->got.refcount > 0)
2796 {
2797 unsigned int need;
2798 asection *s;
2799
2800 /* Make sure this symbol is output as a dynamic symbol.
2801 Undefined weak syms won't yet be marked as dynamic. */
2802 if (h->dynindx == -1
2803 && !h->forced_local)
2804 {
2805 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2806 return FALSE;
2807 }
2808
2809 need = 0;
2810 if ((eh->tls_mask & TLS_TLS) != 0)
2811 {
2812 /* Handle TLS Symbol */
2813 if ((eh->tls_mask & TLS_LD) != 0)
2814 {
2815 if (!eh->elf.def_dynamic)
2816 /* We'll just use htab->tlsld_got.offset. This should
2817 always be the case. It's a little odd if we have
2818 a local dynamic reloc against a non-local symbol. */
2819 htab->tlsld_got.refcount += 1;
2820 else
2821 need += 8;
2822 }
2823 if ((eh->tls_mask & TLS_GD) != 0)
2824 need += 8;
2825 }
2826 else
2827 {
2828 /* Regular (non-TLS) symbol */
2829 need += 4;
2830 }
2831 if (need == 0)
2832 {
2833 h->got.offset = (bfd_vma) -1;
2834 }
2835 else
2836 {
2837 s = htab->elf.sgot;
2838 h->got.offset = s->size;
2839 s->size += need;
2840 htab->elf.srelgot->size += need * (sizeof (Elf32_External_Rela) / 4);
2841 }
2842 }
2843 else
2844 h->got.offset = (bfd_vma) -1;
2845
2846 if (h->dyn_relocs == NULL)
2847 return TRUE;
2848
2849 /* In the shared -Bsymbolic case, discard space allocated for
2850 dynamic pc-relative relocs against symbols which turn out to be
2851 defined in regular objects. For the normal shared case, discard
2852 space for pc-relative relocs that have become local due to symbol
2853 visibility changes. */
2854
2855 if (bfd_link_pic (info))
2856 {
2857 if (h->def_regular
2858 && (h->forced_local
2859 || info->symbolic))
2860 {
2861 struct elf_dyn_relocs **pp;
2862
2863 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
2864 {
2865 p->count -= p->pc_count;
2866 p->pc_count = 0;
2867 if (p->count == 0)
2868 *pp = p->next;
2869 else
2870 pp = &p->next;
2871 }
2872 }
2873 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2874 h->dyn_relocs = NULL;
2875 }
2876 else
2877 {
2878 /* For the non-shared case, discard space for relocs against
2879 symbols which turn out to need copy relocs or are not
2880 dynamic. */
2881
2882 if (!h->non_got_ref
2883 && ((h->def_dynamic
2884 && !h->def_regular)
2885 || (htab->elf.dynamic_sections_created
2886 && (h->root.type == bfd_link_hash_undefweak
2887 || h->root.type == bfd_link_hash_undefined))))
2888 {
2889 /* Make sure this symbol is output as a dynamic symbol.
2890 Undefined weak syms won't yet be marked as dynamic. */
2891 if (h->dynindx == -1
2892 && !h->forced_local)
2893 {
2894 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2895 return FALSE;
2896 }
2897
2898 /* If that succeeded, we know we'll be keeping all the
2899 relocs. */
2900 if (h->dynindx != -1)
2901 goto keep;
2902 }
2903
2904 h->dyn_relocs = NULL;
2905
2906 keep: ;
2907 }
2908
2909 /* Finally, allocate space. */
2910 for (p = h->dyn_relocs; p != NULL; p = p->next)
2911 {
2912 asection *sreloc = elf_section_data (p->sec)->sreloc;
2913 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2914 }
2915
2916 return TRUE;
2917 }
2918
2919 /* Set the sizes of the dynamic sections. */
2920
2921 static bfd_boolean
2922 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2923 struct bfd_link_info *info)
2924 {
2925 struct elf32_mb_link_hash_table *htab;
2926 bfd *dynobj;
2927 asection *s;
2928 bfd *ibfd;
2929
2930 htab = elf32_mb_hash_table (info);
2931 if (htab == NULL)
2932 return FALSE;
2933
2934 dynobj = htab->elf.dynobj;
2935 BFD_ASSERT (dynobj != NULL);
2936
2937 /* Set up .got offsets for local syms, and space for local dynamic
2938 relocs. */
2939 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2940 {
2941 bfd_signed_vma *local_got;
2942 bfd_signed_vma *end_local_got;
2943 bfd_size_type locsymcount;
2944 Elf_Internal_Shdr *symtab_hdr;
2945 unsigned char *lgot_masks;
2946 asection *srel;
2947
2948 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2949 continue;
2950
2951 for (s = ibfd->sections; s != NULL; s = s->next)
2952 {
2953 struct elf_dyn_relocs *p;
2954
2955 for (p = ((struct elf_dyn_relocs *)
2956 elf_section_data (s)->local_dynrel);
2957 p != NULL;
2958 p = p->next)
2959 {
2960 if (!bfd_is_abs_section (p->sec)
2961 && bfd_is_abs_section (p->sec->output_section))
2962 {
2963 /* Input section has been discarded, either because
2964 it is a copy of a linkonce section or due to
2965 linker script /DISCARD/, so we'll be discarding
2966 the relocs too. */
2967 }
2968 else if (p->count != 0)
2969 {
2970 srel = elf_section_data (p->sec)->sreloc;
2971 srel->size += p->count * sizeof (Elf32_External_Rela);
2972 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2973 info->flags |= DF_TEXTREL;
2974 }
2975 }
2976 }
2977
2978 local_got = elf_local_got_refcounts (ibfd);
2979 if (!local_got)
2980 continue;
2981
2982 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2983 locsymcount = symtab_hdr->sh_info;
2984 end_local_got = local_got + locsymcount;
2985 lgot_masks = (unsigned char *) end_local_got;
2986 s = htab->elf.sgot;
2987 srel = htab->elf.srelgot;
2988
2989 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
2990 {
2991 if (*local_got > 0)
2992 {
2993 unsigned int need = 0;
2994 if ((*lgot_masks & TLS_TLS) != 0)
2995 {
2996 if ((*lgot_masks & TLS_GD) != 0)
2997 need += 8;
2998 if ((*lgot_masks & TLS_LD) != 0)
2999 htab->tlsld_got.refcount += 1;
3000 }
3001 else
3002 need += 4;
3003
3004 if (need == 0)
3005 {
3006 *local_got = (bfd_vma) -1;
3007 }
3008 else
3009 {
3010 *local_got = s->size;
3011 s->size += need;
3012 if (bfd_link_pic (info))
3013 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
3014 }
3015 }
3016 else
3017 *local_got = (bfd_vma) -1;
3018 }
3019 }
3020
3021 /* Allocate global sym .plt and .got entries, and space for global
3022 sym dynamic relocs. */
3023 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3024
3025 if (htab->tlsld_got.refcount > 0)
3026 {
3027 htab->tlsld_got.offset = htab->elf.sgot->size;
3028 htab->elf.sgot->size += 8;
3029 if (bfd_link_pic (info))
3030 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
3031 }
3032 else
3033 htab->tlsld_got.offset = (bfd_vma) -1;
3034
3035 if (elf_hash_table (info)->dynamic_sections_created)
3036 {
3037 /* Make space for the trailing nop in .plt. */
3038 if (htab->elf.splt->size > 0)
3039 htab->elf.splt->size += 4;
3040 }
3041
3042 /* The check_relocs and adjust_dynamic_symbol entry points have
3043 determined the sizes of the various dynamic sections. Allocate
3044 memory for them. */
3045 for (s = dynobj->sections; s != NULL; s = s->next)
3046 {
3047 const char *name;
3048 bfd_boolean strip = FALSE;
3049
3050 if ((s->flags & SEC_LINKER_CREATED) == 0)
3051 continue;
3052
3053 /* It's OK to base decisions on the section name, because none
3054 of the dynobj section names depend upon the input files. */
3055 name = bfd_section_name (s);
3056
3057 if (strncmp (name, ".rela", 5) == 0)
3058 {
3059 if (s->size == 0)
3060 {
3061 /* If we don't need this section, strip it from the
3062 output file. This is to handle .rela.bss and
3063 .rela.plt. We must create it in
3064 create_dynamic_sections, because it must be created
3065 before the linker maps input sections to output
3066 sections. The linker does that before
3067 adjust_dynamic_symbol is called, and it is that
3068 function which decides whether anything needs to go
3069 into these sections. */
3070 strip = TRUE;
3071 }
3072 else
3073 {
3074 /* We use the reloc_count field as a counter if we need
3075 to copy relocs into the output file. */
3076 s->reloc_count = 0;
3077 }
3078 }
3079 else if (s != htab->elf.splt
3080 && s != htab->elf.sgot
3081 && s != htab->elf.sgotplt
3082 && s != htab->elf.sdynbss
3083 && s != htab->elf.sdynrelro)
3084 {
3085 /* It's not one of our sections, so don't allocate space. */
3086 continue;
3087 }
3088
3089 if (strip)
3090 {
3091 s->flags |= SEC_EXCLUDE;
3092 continue;
3093 }
3094
3095 /* Allocate memory for the section contents. */
3096 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3097 Unused entries should be reclaimed before the section's contents
3098 are written out, but at the moment this does not happen. Thus in
3099 order to prevent writing out garbage, we initialise the section's
3100 contents to zero. */
3101 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3102 if (s->contents == NULL && s->size != 0)
3103 return FALSE;
3104 }
3105
3106 if (elf_hash_table (info)->dynamic_sections_created)
3107 {
3108 /* Add some entries to the .dynamic section. We fill in the
3109 values later, in microblaze_elf_finish_dynamic_sections, but we
3110 must add the entries now so that we get the correct size for
3111 the .dynamic section. The DT_DEBUG entry is filled in by the
3112 dynamic linker and used by the debugger. */
3113 #define add_dynamic_entry(TAG, VAL) \
3114 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3115
3116 if (bfd_link_executable (info))
3117 {
3118 if (!add_dynamic_entry (DT_DEBUG, 0))
3119 return FALSE;
3120 }
3121
3122 if (!add_dynamic_entry (DT_RELA, 0)
3123 || !add_dynamic_entry (DT_RELASZ, 0)
3124 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3125 return FALSE;
3126
3127 if (htab->elf.splt->size != 0)
3128 {
3129 if (!add_dynamic_entry (DT_PLTGOT, 0)
3130 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3131 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3132 || !add_dynamic_entry (DT_JMPREL, 0)
3133 || !add_dynamic_entry (DT_BIND_NOW, 1))
3134 return FALSE;
3135 }
3136
3137 if (info->flags & DF_TEXTREL)
3138 {
3139 if (!add_dynamic_entry (DT_TEXTREL, 0))
3140 return FALSE;
3141 }
3142 }
3143 #undef add_dynamic_entry
3144 return TRUE;
3145 }
3146
3147 /* Finish up dynamic symbol handling. We set the contents of various
3148 dynamic sections here. */
3149
3150 static bfd_boolean
3151 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
3152 struct bfd_link_info *info,
3153 struct elf_link_hash_entry *h,
3154 Elf_Internal_Sym *sym)
3155 {
3156 struct elf32_mb_link_hash_table *htab;
3157 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h);
3158
3159 htab = elf32_mb_hash_table (info);
3160 if (htab == NULL)
3161 return FALSE;
3162
3163 if (h->plt.offset != (bfd_vma) -1)
3164 {
3165 asection *splt;
3166 asection *srela;
3167 asection *sgotplt;
3168 Elf_Internal_Rela rela;
3169 bfd_byte *loc;
3170 bfd_vma plt_index;
3171 bfd_vma got_offset;
3172 bfd_vma got_addr;
3173
3174 /* This symbol has an entry in the procedure linkage table. Set
3175 it up. */
3176 BFD_ASSERT (h->dynindx != -1);
3177
3178 splt = htab->elf.splt;
3179 srela = htab->elf.srelplt;
3180 sgotplt = htab->elf.sgotplt;
3181 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
3182
3183 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
3184 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
3185 got_addr = got_offset;
3186
3187 /* For non-PIC objects we need absolute address of the GOT entry. */
3188 if (!bfd_link_pic (info))
3189 got_addr += sgotplt->output_section->vma + sgotplt->output_offset;
3190
3191 /* Fill in the entry in the procedure linkage table. */
3192 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
3193 splt->contents + h->plt.offset);
3194 if (bfd_link_pic (info))
3195 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
3196 splt->contents + h->plt.offset + 4);
3197 else
3198 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
3199 splt->contents + h->plt.offset + 4);
3200 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
3201 splt->contents + h->plt.offset + 8);
3202 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
3203 splt->contents + h->plt.offset + 12);
3204
3205 /* Any additions to the .got section??? */
3206 /* bfd_put_32 (output_bfd,
3207 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3208 sgotplt->contents + got_offset); */
3209
3210 /* Fill in the entry in the .rela.plt section. */
3211 rela.r_offset = (sgotplt->output_section->vma
3212 + sgotplt->output_offset
3213 + got_offset);
3214 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
3215 rela.r_addend = 0;
3216 loc = srela->contents;
3217 loc += plt_index * sizeof (Elf32_External_Rela);
3218 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3219
3220 if (!h->def_regular)
3221 {
3222 /* Mark the symbol as undefined, rather than as defined in
3223 the .plt section. Zero the value. */
3224 sym->st_shndx = SHN_UNDEF;
3225 sym->st_value = 0;
3226 }
3227 }
3228
3229 /* h->got.refcount to be checked ? */
3230 if (h->got.offset != (bfd_vma) -1 &&
3231 ! ((h->got.offset & 1) ||
3232 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask)))
3233 {
3234 asection *sgot;
3235 asection *srela;
3236 bfd_vma offset;
3237
3238 /* This symbol has an entry in the global offset table. Set it
3239 up. */
3240
3241 sgot = htab->elf.sgot;
3242 srela = htab->elf.srelgot;
3243 BFD_ASSERT (sgot != NULL && srela != NULL);
3244
3245 offset = (sgot->output_section->vma + sgot->output_offset
3246 + (h->got.offset &~ (bfd_vma) 1));
3247
3248 /* If this is a -Bsymbolic link, and the symbol is defined
3249 locally, we just want to emit a RELATIVE reloc. Likewise if
3250 the symbol was forced to be local because of a version file.
3251 The entry in the global offset table will already have been
3252 initialized in the relocate_section function. */
3253 if (bfd_link_pic (info)
3254 && ((info->symbolic && h->def_regular)
3255 || h->dynindx == -1))
3256 {
3257 asection *sec = h->root.u.def.section;
3258 bfd_vma value;
3259
3260 value = h->root.u.def.value;
3261 if (sec->output_section != NULL)
3262 /* PR 21180: If the output section is NULL, then the symbol is no
3263 longer needed, and in theory the GOT entry is redundant. But
3264 it is too late to change our minds now... */
3265 value += sec->output_section->vma + sec->output_offset;
3266
3267 microblaze_elf_output_dynamic_relocation (output_bfd,
3268 srela, srela->reloc_count++,
3269 /* symindex= */ 0,
3270 R_MICROBLAZE_REL, offset,
3271 value);
3272 }
3273 else
3274 {
3275 microblaze_elf_output_dynamic_relocation (output_bfd,
3276 srela, srela->reloc_count++,
3277 h->dynindx,
3278 R_MICROBLAZE_GLOB_DAT,
3279 offset, 0);
3280 }
3281
3282 bfd_put_32 (output_bfd, (bfd_vma) 0,
3283 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
3284 }
3285
3286 if (h->needs_copy)
3287 {
3288 asection *s;
3289 Elf_Internal_Rela rela;
3290 bfd_byte *loc;
3291
3292 /* This symbols needs a copy reloc. Set it up. */
3293
3294 BFD_ASSERT (h->dynindx != -1);
3295
3296 rela.r_offset = (h->root.u.def.value
3297 + h->root.u.def.section->output_section->vma
3298 + h->root.u.def.section->output_offset);
3299 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
3300 rela.r_addend = 0;
3301 if (h->root.u.def.section == htab->elf.sdynrelro)
3302 s = htab->elf.sreldynrelro;
3303 else
3304 s = htab->elf.srelbss;
3305 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3306 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3307 }
3308
3309 /* Mark some specially defined symbols as absolute. */
3310 if (h == htab->elf.hdynamic
3311 || h == htab->elf.hgot
3312 || h == htab->elf.hplt)
3313 sym->st_shndx = SHN_ABS;
3314
3315 return TRUE;
3316 }
3317
3318
3319 /* Finish up the dynamic sections. */
3320
3321 static bfd_boolean
3322 microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
3323 struct bfd_link_info *info)
3324 {
3325 bfd *dynobj;
3326 asection *sdyn, *sgot;
3327 struct elf32_mb_link_hash_table *htab;
3328
3329 htab = elf32_mb_hash_table (info);
3330 if (htab == NULL)
3331 return FALSE;
3332
3333 dynobj = htab->elf.dynobj;
3334
3335 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3336
3337 if (htab->elf.dynamic_sections_created)
3338 {
3339 asection *splt;
3340 Elf32_External_Dyn *dyncon, *dynconend;
3341
3342 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3343 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3344 for (; dyncon < dynconend; dyncon++)
3345 {
3346 Elf_Internal_Dyn dyn;
3347 asection *s;
3348 bfd_boolean size;
3349
3350 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3351
3352 switch (dyn.d_tag)
3353 {
3354 case DT_PLTGOT:
3355 s = htab->elf.sgotplt;
3356 size = FALSE;
3357 break;
3358
3359 case DT_PLTRELSZ:
3360 s = htab->elf.srelplt;
3361 size = TRUE;
3362 break;
3363
3364 case DT_JMPREL:
3365 s = htab->elf.srelplt;
3366 size = FALSE;
3367 break;
3368
3369 default:
3370 continue;
3371 }
3372
3373 if (s == NULL)
3374 dyn.d_un.d_val = 0;
3375 else
3376 {
3377 if (!size)
3378 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3379 else
3380 dyn.d_un.d_val = s->size;
3381 }
3382 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3383 }
3384
3385 splt = htab->elf.splt;
3386 BFD_ASSERT (splt != NULL && sdyn != NULL);
3387
3388 /* Clear the first entry in the procedure linkage table,
3389 and put a nop in the last four bytes. */
3390 if (splt->size > 0)
3391 {
3392 memset (splt->contents, 0, PLT_ENTRY_SIZE);
3393 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
3394 splt->contents + splt->size - 4);
3395
3396 if (splt->output_section != bfd_abs_section_ptr)
3397 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3398 }
3399 }
3400
3401 /* Set the first entry in the global offset table to the address of
3402 the dynamic section. */
3403 sgot = htab->elf.sgotplt;
3404 if (sgot && sgot->size > 0)
3405 {
3406 if (sdyn == NULL)
3407 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3408 else
3409 bfd_put_32 (output_bfd,
3410 sdyn->output_section->vma + sdyn->output_offset,
3411 sgot->contents);
3412 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3413 }
3414
3415 if (htab->elf.sgot && htab->elf.sgot->size > 0)
3416 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
3417
3418 return TRUE;
3419 }
3420
3421 /* Hook called by the linker routine which adds symbols from an object
3422 file. We use it to put .comm items in .sbss, and not .bss. */
3423
3424 static bfd_boolean
3425 microblaze_elf_add_symbol_hook (bfd *abfd,
3426 struct bfd_link_info *info,
3427 Elf_Internal_Sym *sym,
3428 const char **namep ATTRIBUTE_UNUSED,
3429 flagword *flagsp ATTRIBUTE_UNUSED,
3430 asection **secp,
3431 bfd_vma *valp)
3432 {
3433 if (sym->st_shndx == SHN_COMMON
3434 && !bfd_link_relocatable (info)
3435 && sym->st_size <= elf_gp_size (abfd))
3436 {
3437 /* Common symbols less than or equal to -G nn bytes are automatically
3438 put into .sbss. */
3439 *secp = bfd_make_section_old_way (abfd, ".sbss");
3440 if (*secp == NULL
3441 || !bfd_set_section_flags (*secp, SEC_IS_COMMON))
3442 return FALSE;
3443
3444 *valp = sym->st_size;
3445 }
3446
3447 return TRUE;
3448 }
3449
3450 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3451 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3452
3453 #define TARGET_BIG_SYM microblaze_elf32_vec
3454 #define TARGET_BIG_NAME "elf32-microblaze"
3455
3456 #define ELF_ARCH bfd_arch_microblaze
3457 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3458 #define ELF_MACHINE_CODE EM_MICROBLAZE
3459 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3460 #define ELF_MAXPAGESIZE 0x1000
3461 #define elf_info_to_howto microblaze_elf_info_to_howto
3462 #define elf_info_to_howto_rel NULL
3463
3464 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3465 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3466 #define elf_backend_relocate_section microblaze_elf_relocate_section
3467 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3468 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
3469 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3470
3471 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3472 #define elf_backend_check_relocs microblaze_elf_check_relocs
3473 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3474 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3475 #define elf_backend_can_gc_sections 1
3476 #define elf_backend_can_refcount 1
3477 #define elf_backend_want_got_plt 1
3478 #define elf_backend_plt_readonly 1
3479 #define elf_backend_got_header_size 12
3480 #define elf_backend_want_dynrelro 1
3481 #define elf_backend_rela_normal 1
3482 #define elf_backend_dtrel_excludes_plt 1
3483
3484 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3485 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3486 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3487 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3488 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3489 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3490
3491 #include "elf32-target.h"
GDB Binutils - Deliverables
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