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