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merge from gcc
[gdb/gnu.git] / bfd / elf32-microblaze.c
blob4a5e80dd86debb87c64ad1670105a3684b6eff7c
1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
2
3 Copyright 2009, 2010, 2011, 2012 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 2, /* Size (0 = byte, 1 = short, 2 = long). */
48 32, /* Bitsize. */
49 FALSE, /* PC_relative. */
50 0, /* Bitpos. */
51 complain_overflow_bitfield, /* 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 2, /* Size (0 = byte, 1 = short, 2 = long). */
183 32, /* Bitsize. */
184 TRUE, /* PC_relative. */
185 0, /* Bitpos. */
186 complain_overflow_bitfield, /* 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 if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
647 /* Initialize howto table if needed. */
648 microblaze_elf_howto_init ();
649
650 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MICROBLAZE_max);
651
652 cache_ptr->howto = microblaze_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
653 }
654
655 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
656
657 static bfd_boolean
658 microblaze_elf_is_local_label_name (bfd *abfd, const char *name)
659 {
660 if (name[0] == 'L' && name[1] == '.')
661 return TRUE;
662
663 if (name[0] == '$' && name[1] == 'L')
664 return TRUE;
665
666 /* With gcc, the labels go back to starting with '.', so we accept
667 the generic ELF local label syntax as well. */
668 return _bfd_elf_is_local_label_name (abfd, name);
669 }
670
671 /* The microblaze linker (like many others) needs to keep track of
672 the number of relocs that it decides to copy as dynamic relocs in
673 check_relocs for each symbol. This is so that it can later discard
674 them if they are found to be unnecessary. We store the information
675 in a field extending the regular ELF linker hash table. */
676
677 struct elf32_mb_dyn_relocs
678 {
679 struct elf32_mb_dyn_relocs *next;
680
681 /* The input section of the reloc. */
682 asection *sec;
683
684 /* Total number of relocs copied for the input section. */
685 bfd_size_type count;
686
687 /* Number of pc-relative relocs copied for the input section. */
688 bfd_size_type pc_count;
689 };
690
691 /* ELF linker hash entry. */
692
693 struct elf32_mb_link_hash_entry
694 {
695 struct elf_link_hash_entry elf;
696
697 /* Track dynamic relocs copied for this symbol. */
698 struct elf32_mb_dyn_relocs *dyn_relocs;
699
700 /* TLS Reference Types for the symbol; Updated by check_relocs */
701 #define TLS_GD 1 /* GD reloc. */
702 #define TLS_LD 2 /* LD reloc. */
703 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
704 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
705 #define TLS_TLS 16 /* Any TLS reloc. */
706 unsigned char tls_mask;
707
708 };
709
710 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD))
711 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD))
712 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL))
713 #define IS_TLS_NONE(x) (x == 0)
714
715 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
716
717 /* ELF linker hash table. */
718
719 struct elf32_mb_link_hash_table
720 {
721 struct elf_link_hash_table elf;
722
723 /* Short-cuts to get to dynamic linker sections. */
724 asection *sgot;
725 asection *sgotplt;
726 asection *srelgot;
727 asection *splt;
728 asection *srelplt;
729 asection *sdynbss;
730 asection *srelbss;
731
732 /* Small local sym to section mapping cache. */
733 struct sym_cache sym_sec;
734
735 /* TLS Local Dynamic GOT Entry */
736 union {
737 bfd_signed_vma refcount;
738 bfd_vma offset;
739 } tlsld_got;
740 };
741
742 /* Nonzero if this section has TLS related relocations. */
743 #define has_tls_reloc sec_flg0
744
745 /* Get the ELF linker hash table from a link_info structure. */
746
747 #define elf32_mb_hash_table(p) \
748 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
749 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL)
750
751 /* Create an entry in a microblaze ELF linker hash table. */
752
753 static struct bfd_hash_entry *
754 link_hash_newfunc (struct bfd_hash_entry *entry,
755 struct bfd_hash_table *table,
756 const char *string)
757 {
758 /* Allocate the structure if it has not already been allocated by a
759 subclass. */
760 if (entry == NULL)
761 {
762 entry = bfd_hash_allocate (table,
763 sizeof (struct elf32_mb_link_hash_entry));
764 if (entry == NULL)
765 return entry;
766 }
767
768 /* Call the allocation method of the superclass. */
769 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
770 if (entry != NULL)
771 {
772 struct elf32_mb_link_hash_entry *eh;
773
774 eh = (struct elf32_mb_link_hash_entry *) entry;
775 eh->dyn_relocs = NULL;
776 eh->tls_mask = 0;
777 }
778
779 return entry;
780 }
781
782 /* Create a mb ELF linker hash table. */
783
784 static struct bfd_link_hash_table *
785 microblaze_elf_link_hash_table_create (bfd *abfd)
786 {
787 struct elf32_mb_link_hash_table *ret;
788 bfd_size_type amt = sizeof (struct elf32_mb_link_hash_table);
789
790 ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt);
791 if (ret == NULL)
792 return NULL;
793
794 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
795 sizeof (struct elf32_mb_link_hash_entry),
796 MICROBLAZE_ELF_DATA))
797 {
798 free (ret);
799 return NULL;
800 }
801
802 return &ret->elf.root;
803 }
804 \f
805 /* Set the values of the small data pointers. */
806
807 static void
808 microblaze_elf_final_sdp (struct bfd_link_info *info)
809 {
810 struct bfd_link_hash_entry *h;
811
812 h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
813 if (h != (struct bfd_link_hash_entry *) NULL
814 && h->type == bfd_link_hash_defined)
815 ro_small_data_pointer = (h->u.def.value
816 + h->u.def.section->output_section->vma
817 + h->u.def.section->output_offset);
818
819 h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
820 if (h != (struct bfd_link_hash_entry *) NULL
821 && h->type == bfd_link_hash_defined)
822 rw_small_data_pointer = (h->u.def.value
823 + h->u.def.section->output_section->vma
824 + h->u.def.section->output_offset);
825 }
826
827 static bfd_vma
828 dtprel_base (struct bfd_link_info *info)
829 {
830 /* If tls_sec is NULL, we should have signalled an error already. */
831 if (elf_hash_table (info)->tls_sec == NULL)
832 return 0;
833 return elf_hash_table (info)->tls_sec->vma;
834 }
835
836 /* The size of the thread control block. */
837 #define TCB_SIZE 8
838
839 /* Output a simple dynamic relocation into SRELOC. */
840
841 static void
842 microblaze_elf_output_dynamic_relocation (bfd *output_bfd,
843 asection *sreloc,
844 unsigned long reloc_index,
845 unsigned long indx,
846 int r_type,
847 bfd_vma offset,
848 bfd_vma addend)
849 {
850
851 Elf_Internal_Rela rel;
852
853 rel.r_info = ELF32_R_INFO (indx, r_type);
854 rel.r_offset = offset;
855 rel.r_addend = addend;
856
857 bfd_elf32_swap_reloca_out (output_bfd, &rel,
858 (sreloc->contents + reloc_index * sizeof (Elf32_External_Rela)));
859 }
860
861 /* This code is taken from elf32-m32r.c
862 There is some attempt to make this function usable for many architectures,
863 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
864 if only to serve as a learning tool.
865
866 The RELOCATE_SECTION function is called by the new ELF backend linker
867 to handle the relocations for a section.
868
869 The relocs are always passed as Rela structures; if the section
870 actually uses Rel structures, the r_addend field will always be
871 zero.
872
873 This function is responsible for adjust the section contents as
874 necessary, and (if using Rela relocs and generating a
875 relocatable output file) adjusting the reloc addend as
876 necessary.
877
878 This function does not have to worry about setting the reloc
879 address or the reloc symbol index.
880
881 LOCAL_SYMS is a pointer to the swapped in local symbols.
882
883 LOCAL_SECTIONS is an array giving the section in the input file
884 corresponding to the st_shndx field of each local symbol.
885
886 The global hash table entry for the global symbols can be found
887 via elf_sym_hashes (input_bfd).
888
889 When generating relocatable output, this function must handle
890 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
891 going to be the section symbol corresponding to the output
892 section, which means that the addend must be adjusted
893 accordingly. */
894
895 static bfd_boolean
896 microblaze_elf_relocate_section (bfd *output_bfd,
897 struct bfd_link_info *info,
898 bfd *input_bfd,
899 asection *input_section,
900 bfd_byte *contents,
901 Elf_Internal_Rela *relocs,
902 Elf_Internal_Sym *local_syms,
903 asection **local_sections)
904 {
905 struct elf32_mb_link_hash_table *htab;
906 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
907 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
908 Elf_Internal_Rela *rel, *relend;
909 int endian = (bfd_little_endian (output_bfd)) ? 0 : 2;
910 /* Assume success. */
911 bfd_boolean ret = TRUE;
912 asection *sreloc;
913 bfd_vma *local_got_offsets;
914 unsigned int tls_type;
915
916 if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1])
917 microblaze_elf_howto_init ();
918
919 htab = elf32_mb_hash_table (info);
920 if (htab == NULL)
921 return FALSE;
922
923 local_got_offsets = elf_local_got_offsets (input_bfd);
924
925 sreloc = elf_section_data (input_section)->sreloc;
926
927 rel = relocs;
928 relend = relocs + input_section->reloc_count;
929 for (; rel < relend; rel++)
930 {
931 int r_type;
932 reloc_howto_type *howto;
933 unsigned long r_symndx;
934 bfd_vma addend = rel->r_addend;
935 bfd_vma offset = rel->r_offset;
936 struct elf_link_hash_entry *h;
937 Elf_Internal_Sym *sym;
938 asection *sec;
939 const char *sym_name;
940 bfd_reloc_status_type r = bfd_reloc_ok;
941 const char *errmsg = NULL;
942 bfd_boolean unresolved_reloc = FALSE;
943
944 h = NULL;
945 r_type = ELF32_R_TYPE (rel->r_info);
946 tls_type = 0;
947
948 if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max)
949 {
950 (*_bfd_error_handler) (_("%s: unknown relocation type %d"),
951 bfd_get_filename (input_bfd), (int) r_type);
952 bfd_set_error (bfd_error_bad_value);
953 ret = FALSE;
954 continue;
955 }
956
957 howto = microblaze_elf_howto_table[r_type];
958 r_symndx = ELF32_R_SYM (rel->r_info);
959
960 if (info->relocatable)
961 {
962 /* This is a relocatable link. We don't have to change
963 anything, unless the reloc is against a section symbol,
964 in which case we have to adjust according to where the
965 section symbol winds up in the output section. */
966 sec = NULL;
967 if (r_symndx >= symtab_hdr->sh_info)
968 /* External symbol. */
969 continue;
970
971 /* Local symbol. */
972 sym = local_syms + r_symndx;
973 sym_name = "<local symbol>";
974 /* STT_SECTION: symbol is associated with a section. */
975 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
976 /* Symbol isn't associated with a section. Nothing to do. */
977 continue;
978
979 sec = local_sections[r_symndx];
980 addend += sec->output_offset + sym->st_value;
981 #ifndef USE_REL
982 /* This can't be done for USE_REL because it doesn't mean anything
983 and elf_link_input_bfd asserts this stays zero. */
984 /* rel->r_addend = addend; */
985 #endif
986
987 #ifndef USE_REL
988 /* Addends are stored with relocs. We're done. */
989 continue;
990 #else /* USE_REL */
991 /* If partial_inplace, we need to store any additional addend
992 back in the section. */
993 if (!howto->partial_inplace)
994 continue;
995 /* ??? Here is a nice place to call a special_function like handler. */
996 r = _bfd_relocate_contents (howto, input_bfd, addend,
997 contents + offset);
998 #endif /* USE_REL */
999 }
1000 else
1001 {
1002 bfd_vma relocation;
1003
1004 /* This is a final link. */
1005 sym = NULL;
1006 sec = NULL;
1007 unresolved_reloc = FALSE;
1008
1009 if (r_symndx < symtab_hdr->sh_info)
1010 {
1011 /* Local symbol. */
1012 sym = local_syms + r_symndx;
1013 sec = local_sections[r_symndx];
1014 if (sec == 0)
1015 continue;
1016 sym_name = "<local symbol>";
1017 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1018 /* r_addend may have changed if the reference section was
1019 a merge section. */
1020 addend = rel->r_addend;
1021 }
1022 else
1023 {
1024 /* External symbol. */
1025 bfd_boolean warned ATTRIBUTE_UNUSED;
1026
1027 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1028 r_symndx, symtab_hdr, sym_hashes,
1029 h, sec, relocation,
1030 unresolved_reloc, warned);
1031 sym_name = h->root.root.string;
1032 }
1033
1034 /* Sanity check the address. */
1035 if (offset > bfd_get_section_limit (input_bfd, input_section))
1036 {
1037 r = bfd_reloc_outofrange;
1038 goto check_reloc;
1039 }
1040
1041 switch ((int) r_type)
1042 {
1043 case (int) R_MICROBLAZE_SRO32 :
1044 {
1045 const char *name;
1046
1047 /* Only relocate if the symbol is defined. */
1048 if (sec)
1049 {
1050 name = bfd_get_section_name (sec->owner, sec);
1051
1052 if (strcmp (name, ".sdata2") == 0
1053 || strcmp (name, ".sbss2") == 0)
1054 {
1055 if (ro_small_data_pointer == 0)
1056 microblaze_elf_final_sdp (info);
1057 if (ro_small_data_pointer == 0)
1058 {
1059 ret = FALSE;
1060 r = bfd_reloc_undefined;
1061 goto check_reloc;
1062 }
1063
1064 /* At this point `relocation' contains the object's
1065 address. */
1066 relocation -= ro_small_data_pointer;
1067 /* Now it contains the offset from _SDA2_BASE_. */
1068 r = _bfd_final_link_relocate (howto, input_bfd,
1069 input_section,
1070 contents, offset,
1071 relocation, addend);
1072 }
1073 else
1074 {
1075 (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
1076 bfd_get_filename (input_bfd),
1077 sym_name,
1078 microblaze_elf_howto_table[(int) r_type]->name,
1079 bfd_get_section_name (sec->owner, sec));
1080 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1081 ret = FALSE;
1082 continue;
1083 }
1084 }
1085 }
1086 break;
1087
1088 case (int) R_MICROBLAZE_SRW32 :
1089 {
1090 const char *name;
1091
1092 /* Only relocate if the symbol is defined. */
1093 if (sec)
1094 {
1095 name = bfd_get_section_name (sec->owner, sec);
1096
1097 if (strcmp (name, ".sdata") == 0
1098 || strcmp (name, ".sbss") == 0)
1099 {
1100 if (rw_small_data_pointer == 0)
1101 microblaze_elf_final_sdp (info);
1102 if (rw_small_data_pointer == 0)
1103 {
1104 ret = FALSE;
1105 r = bfd_reloc_undefined;
1106 goto check_reloc;
1107 }
1108
1109 /* At this point `relocation' contains the object's
1110 address. */
1111 relocation -= rw_small_data_pointer;
1112 /* Now it contains the offset from _SDA_BASE_. */
1113 r = _bfd_final_link_relocate (howto, input_bfd,
1114 input_section,
1115 contents, offset,
1116 relocation, addend);
1117 }
1118 else
1119 {
1120 (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
1121 bfd_get_filename (input_bfd),
1122 sym_name,
1123 microblaze_elf_howto_table[(int) r_type]->name,
1124 bfd_get_section_name (sec->owner, sec));
1125 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1126 ret = FALSE;
1127 continue;
1128 }
1129 }
1130 }
1131 break;
1132
1133 case (int) R_MICROBLAZE_32_SYM_OP_SYM:
1134 break; /* Do nothing. */
1135
1136 case (int) R_MICROBLAZE_GOTPC_64:
1137 relocation = htab->sgotplt->output_section->vma
1138 + htab->sgotplt->output_offset;
1139 relocation -= (input_section->output_section->vma
1140 + input_section->output_offset
1141 + offset + INST_WORD_SIZE);
1142 relocation += addend;
1143 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1144 contents + offset + endian);
1145 bfd_put_16 (input_bfd, relocation & 0xffff,
1146 contents + offset + endian + INST_WORD_SIZE);
1147 break;
1148
1149 case (int) R_MICROBLAZE_PLT_64:
1150 {
1151 bfd_vma immediate;
1152 if (htab->splt != NULL && h != NULL
1153 && h->plt.offset != (bfd_vma) -1)
1154 {
1155 relocation = (htab->splt->output_section->vma
1156 + htab->splt->output_offset
1157 + h->plt.offset);
1158 unresolved_reloc = FALSE;
1159 immediate = relocation - (input_section->output_section->vma
1160 + input_section->output_offset
1161 + offset + INST_WORD_SIZE);
1162 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1163 contents + offset + endian);
1164 bfd_put_16 (input_bfd, immediate & 0xffff,
1165 contents + offset + endian + INST_WORD_SIZE);
1166 }
1167 else
1168 {
1169 relocation -= (input_section->output_section->vma
1170 + input_section->output_offset
1171 + offset + INST_WORD_SIZE);
1172 immediate = relocation;
1173 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1174 contents + offset + endian);
1175 bfd_put_16 (input_bfd, immediate & 0xffff,
1176 contents + offset + endian + INST_WORD_SIZE);
1177 }
1178 break;
1179 }
1180
1181 case (int) R_MICROBLAZE_TLSGD:
1182 tls_type = (TLS_TLS | TLS_GD);
1183 goto dogot;
1184 case (int) R_MICROBLAZE_TLSLD:
1185 tls_type = (TLS_TLS | TLS_LD);
1186 dogot:
1187 case (int) R_MICROBLAZE_GOT_64:
1188 {
1189 bfd_vma *offp;
1190 bfd_vma off, off2;
1191 unsigned long indx;
1192 bfd_vma static_value;
1193
1194 bfd_boolean need_relocs = FALSE;
1195 if (htab->sgot == NULL)
1196 abort ();
1197
1198 indx = 0;
1199 offp = NULL;
1200
1201 /* 1. Identify GOT Offset;
1202 2. Compute Static Values
1203 3. Process Module Id, Process Offset
1204 4. Fixup Relocation with GOT offset value. */
1205
1206 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1207 if (IS_TLS_LD (tls_type))
1208 offp = &htab->tlsld_got.offset;
1209 else if (h != NULL)
1210 {
1211 if (htab->sgotplt != NULL && h->got.offset != (bfd_vma) -1)
1212 offp = &h->got.offset;
1213 else
1214 abort ();
1215 }
1216 else
1217 {
1218 if (local_got_offsets == NULL)
1219 abort ();
1220 offp = &local_got_offsets[r_symndx];
1221 }
1222
1223 if (!offp)
1224 abort ();
1225
1226 off = (*offp) & ~1;
1227 off2 = off;
1228
1229 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type))
1230 off2 = off + 4;
1231
1232 /* Symbol index to use for relocs */
1233 if (h != NULL)
1234 {
1235 bfd_boolean dyn =
1236 elf_hash_table (info)->dynamic_sections_created;
1237
1238 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1239 && (!info->shared || !SYMBOL_REFERENCES_LOCAL (info, h)))
1240 indx = h->dynindx;
1241 }
1242
1243 /* Need to generate relocs ? */
1244 if ((info->shared || indx != 0)
1245 && (h == NULL
1246 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1247 || h->root.type != bfd_link_hash_undefweak))
1248 need_relocs = TRUE;
1249
1250 /* 2. Compute/Emit Static value of r-expression */
1251 static_value = relocation + addend;
1252
1253 /* 3. Process module-id and offset */
1254 if (! ((*offp) & 1) )
1255 {
1256 bfd_vma got_offset;
1257
1258 got_offset = (htab->sgot->output_section->vma
1259 + htab->sgot->output_offset
1260 + off);
1261
1262 /* Process module-id */
1263 if (IS_TLS_LD(tls_type))
1264 {
1265 if (! info->shared)
1266 {
1267 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1268 }
1269 else
1270 {
1271 microblaze_elf_output_dynamic_relocation (output_bfd,
1272 htab->srelgot, htab->srelgot->reloc_count++,
1273 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32,
1274 got_offset, 0);
1275 }
1276 }
1277 else if (IS_TLS_GD(tls_type))
1278 {
1279 if (! need_relocs)
1280 {
1281 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1282 }
1283 else
1284 {
1285 microblaze_elf_output_dynamic_relocation (output_bfd,
1286 htab->srelgot,
1287 htab->srelgot->reloc_count++,
1288 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32,
1289 got_offset, indx ? 0 : static_value);
1290 }
1291 }
1292
1293 /* Process Offset */
1294 if (htab->srelgot == NULL)
1295 abort ();
1296
1297 got_offset = (htab->sgot->output_section->vma
1298 + htab->sgot->output_offset
1299 + off2);
1300 if (IS_TLS_LD(tls_type))
1301 {
1302 /* For LD, offset should be 0 */
1303 *offp |= 1;
1304 bfd_put_32 (output_bfd, 0, htab->sgot->contents + off2);
1305 }
1306 else if (IS_TLS_GD(tls_type))
1307 {
1308 *offp |= 1;
1309 static_value -= dtprel_base(info);
1310 if (need_relocs)
1311 {
1312 microblaze_elf_output_dynamic_relocation (output_bfd,
1313 htab->srelgot, htab->srelgot->reloc_count++,
1314 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32,
1315 got_offset, indx ? 0 : static_value);
1316 }
1317 else
1318 {
1319 bfd_put_32 (output_bfd, static_value,
1320 htab->sgot->contents + off2);
1321 }
1322 }
1323 else
1324 {
1325 bfd_put_32 (output_bfd, static_value,
1326 htab->sgot->contents + off2);
1327
1328 /* Relocs for dyn symbols generated by
1329 finish_dynamic_symbols */
1330 if (info->shared && h == NULL)
1331 {
1332 *offp |= 1;
1333 microblaze_elf_output_dynamic_relocation (output_bfd,
1334 htab->srelgot, htab->srelgot->reloc_count++,
1335 /* symindex= */ indx, R_MICROBLAZE_REL,
1336 got_offset, static_value);
1337 }
1338 }
1339 }
1340
1341 /* 4. Fixup Relocation with GOT offset value
1342 Compute relative address of GOT entry for applying
1343 the current relocation */
1344 relocation = htab->sgot->output_section->vma
1345 + htab->sgot->output_offset
1346 + off
1347 - htab->sgotplt->output_section->vma
1348 - htab->sgotplt->output_offset;
1349
1350 /* Apply Current Relocation */
1351 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1352 contents + offset + endian);
1353 bfd_put_16 (input_bfd, relocation & 0xffff,
1354 contents + offset + endian + INST_WORD_SIZE);
1355
1356 unresolved_reloc = FALSE;
1357 break;
1358 }
1359
1360 case (int) R_MICROBLAZE_GOTOFF_64:
1361 {
1362 bfd_vma immediate;
1363 unsigned short lo, high;
1364 relocation += addend;
1365 relocation -= htab->sgotplt->output_section->vma
1366 + htab->sgotplt->output_offset;
1367 /* Write this value into correct location. */
1368 immediate = relocation;
1369 lo = immediate & 0x0000ffff;
1370 high = (immediate >> 16) & 0x0000ffff;
1371 bfd_put_16 (input_bfd, high, contents + offset + endian);
1372 bfd_put_16 (input_bfd, lo, contents + offset + INST_WORD_SIZE + endian);
1373 break;
1374 }
1375
1376 case (int) R_MICROBLAZE_GOTOFF_32:
1377 {
1378 relocation += addend;
1379 relocation -= htab->sgotplt->output_section->vma
1380 + htab->sgotplt->output_offset;
1381 /* Write this value into correct location. */
1382 bfd_put_32 (input_bfd, relocation, contents + offset);
1383 break;
1384 }
1385
1386 case (int) R_MICROBLAZE_TLSDTPREL64:
1387 relocation += addend;
1388 relocation -= dtprel_base(info);
1389 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1390 contents + offset + 2);
1391 bfd_put_16 (input_bfd, relocation & 0xffff,
1392 contents + offset + 2 + INST_WORD_SIZE);
1393 break;
1394 case (int) R_MICROBLAZE_64_PCREL :
1395 case (int) R_MICROBLAZE_64:
1396 case (int) R_MICROBLAZE_32:
1397 {
1398 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1399 from removed linkonce sections, or sections discarded by
1400 a linker script. */
1401 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0)
1402 {
1403 relocation += addend;
1404 if (r_type == R_MICROBLAZE_32)
1405 bfd_put_32 (input_bfd, relocation, contents + offset);
1406 else
1407 {
1408 if (r_type == R_MICROBLAZE_64_PCREL)
1409 relocation -= (input_section->output_section->vma
1410 + input_section->output_offset
1411 + offset + INST_WORD_SIZE);
1412 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1413 contents + offset + endian);
1414 bfd_put_16 (input_bfd, relocation & 0xffff,
1415 contents + offset + endian + INST_WORD_SIZE);
1416 }
1417 break;
1418 }
1419
1420 if ((info->shared
1421 && (h == NULL
1422 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1423 || h->root.type != bfd_link_hash_undefweak)
1424 && (!howto->pc_relative
1425 || (h != NULL
1426 && h->dynindx != -1
1427 && (!info->symbolic
1428 || !h->def_regular))))
1429 || (!info->shared
1430 && h != NULL
1431 && h->dynindx != -1
1432 && !h->non_got_ref
1433 && ((h->def_dynamic
1434 && !h->def_regular)
1435 || h->root.type == bfd_link_hash_undefweak
1436 || h->root.type == bfd_link_hash_undefined)))
1437 {
1438 Elf_Internal_Rela outrel;
1439 bfd_byte *loc;
1440 bfd_boolean skip;
1441
1442 /* When generating a shared object, these relocations
1443 are copied into the output file to be resolved at run
1444 time. */
1445
1446 BFD_ASSERT (sreloc != NULL);
1447
1448 skip = FALSE;
1449
1450 outrel.r_offset =
1451 _bfd_elf_section_offset (output_bfd, info, input_section,
1452 rel->r_offset);
1453 if (outrel.r_offset == (bfd_vma) -1)
1454 skip = TRUE;
1455 else if (outrel.r_offset == (bfd_vma) -2)
1456 skip = TRUE;
1457 outrel.r_offset += (input_section->output_section->vma
1458 + input_section->output_offset);
1459
1460 if (skip)
1461 memset (&outrel, 0, sizeof outrel);
1462 /* h->dynindx may be -1 if the symbol was marked to
1463 become local. */
1464 else if (h != NULL
1465 && ((! info->symbolic && h->dynindx != -1)
1466 || !h->def_regular))
1467 {
1468 BFD_ASSERT (h->dynindx != -1);
1469 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1470 outrel.r_addend = addend;
1471 }
1472 else
1473 {
1474 if (r_type == R_MICROBLAZE_32)
1475 {
1476 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
1477 outrel.r_addend = relocation + addend;
1478 }
1479 else
1480 {
1481 BFD_FAIL ();
1482 (*_bfd_error_handler)
1483 (_("%B: probably compiled without -fPIC?"),
1484 input_bfd);
1485 bfd_set_error (bfd_error_bad_value);
1486 return FALSE;
1487 }
1488 }
1489
1490 loc = sreloc->contents;
1491 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1492 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1493 break;
1494 }
1495 else
1496 {
1497 relocation += addend;
1498 if (r_type == R_MICROBLAZE_32)
1499 bfd_put_32 (input_bfd, relocation, contents + offset);
1500 else
1501 {
1502 if (r_type == R_MICROBLAZE_64_PCREL)
1503 relocation -= (input_section->output_section->vma
1504 + input_section->output_offset
1505 + offset + INST_WORD_SIZE);
1506 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1507 contents + offset + endian);
1508 bfd_put_16 (input_bfd, relocation & 0xffff,
1509 contents + offset + endian + INST_WORD_SIZE);
1510 }
1511 break;
1512 }
1513 }
1514
1515 default :
1516 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1517 contents, offset,
1518 relocation, addend);
1519 break;
1520 }
1521 }
1522
1523 check_reloc:
1524
1525 if (r != bfd_reloc_ok)
1526 {
1527 /* FIXME: This should be generic enough to go in a utility. */
1528 const char *name;
1529
1530 if (h != NULL)
1531 name = h->root.root.string;
1532 else
1533 {
1534 name = (bfd_elf_string_from_elf_section
1535 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1536 if (name == NULL || *name == '\0')
1537 name = bfd_section_name (input_bfd, sec);
1538 }
1539
1540 if (errmsg != NULL)
1541 goto common_error;
1542
1543 switch (r)
1544 {
1545 case bfd_reloc_overflow:
1546 if (!((*info->callbacks->reloc_overflow)
1547 (info, (h ? &h->root : NULL), name, howto->name,
1548 (bfd_vma) 0, input_bfd, input_section, offset)))
1549 return FALSE;
1550 break;
1551
1552 case bfd_reloc_undefined:
1553 if (!((*info->callbacks->undefined_symbol)
1554 (info, name, input_bfd, input_section, offset, TRUE)))
1555 return FALSE;
1556 break;
1557
1558 case bfd_reloc_outofrange:
1559 errmsg = _("internal error: out of range error");
1560 goto common_error;
1561
1562 case bfd_reloc_notsupported:
1563 errmsg = _("internal error: unsupported relocation error");
1564 goto common_error;
1565
1566 case bfd_reloc_dangerous:
1567 errmsg = _("internal error: dangerous error");
1568 goto common_error;
1569
1570 default:
1571 errmsg = _("internal error: unknown error");
1572 /* Fall through. */
1573 common_error:
1574 if (!((*info->callbacks->warning)
1575 (info, errmsg, name, input_bfd, input_section, offset)))
1576 return FALSE;
1577 break;
1578 }
1579 }
1580 }
1581
1582 return ret;
1583 }
1584
1585 /* Merge backend specific data from an object file to the output
1586 object file when linking.
1587
1588 Note: We only use this hook to catch endian mismatches. */
1589 static bfd_boolean
1590 microblaze_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
1591 {
1592 /* Check if we have the same endianess. */
1593 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
1594 return FALSE;
1595
1596 return TRUE;
1597 }
1598
1599 \f
1600 /* Calculate fixup value for reference. */
1601
1602 static int
1603 calc_fixup (bfd_vma start, bfd_vma size, asection *sec)
1604 {
1605 bfd_vma end = start + size;
1606 int i, fixup = 0;
1607
1608 if (sec == NULL || sec->relax == NULL)
1609 return 0;
1610
1611 /* Look for addr in relax table, total fixup value. */
1612 for (i = 0; i < sec->relax_count; i++)
1613 {
1614 if (end <= sec->relax[i].addr)
1615 break;
1616 if ((end != start) && (start > sec->relax[i].addr))
1617 continue;
1618 fixup += sec->relax[i].size;
1619 }
1620 return fixup;
1621 }
1622
1623 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1624 a 32-bit instruction. */
1625 static void
1626 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1627 {
1628 unsigned long instr = bfd_get_32 (abfd, bfd_addr);
1629 instr &= ~0x0000ffff;
1630 instr |= (val & 0x0000ffff);
1631 bfd_put_32 (abfd, instr, bfd_addr);
1632 }
1633
1634 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1635 two consecutive 32-bit instructions. */
1636 static void
1637 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1638 {
1639 unsigned long instr_hi;
1640 unsigned long instr_lo;
1641
1642 instr_hi = bfd_get_32 (abfd, bfd_addr);
1643 instr_hi &= ~0x0000ffff;
1644 instr_hi |= ((val >> 16) & 0x0000ffff);
1645 bfd_put_32 (abfd, instr_hi, bfd_addr);
1646
1647 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE);
1648 instr_lo &= ~0x0000ffff;
1649 instr_lo |= (val & 0x0000ffff);
1650 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE);
1651 }
1652
1653 static bfd_boolean
1654 microblaze_elf_relax_section (bfd *abfd,
1655 asection *sec,
1656 struct bfd_link_info *link_info,
1657 bfd_boolean *again)
1658 {
1659 Elf_Internal_Shdr *symtab_hdr;
1660 Elf_Internal_Rela *internal_relocs;
1661 Elf_Internal_Rela *free_relocs = NULL;
1662 Elf_Internal_Rela *irel, *irelend;
1663 bfd_byte *contents = NULL;
1664 bfd_byte *free_contents = NULL;
1665 int rel_count;
1666 unsigned int shndx;
1667 int i, sym_index;
1668 asection *o;
1669 struct elf_link_hash_entry *sym_hash;
1670 Elf_Internal_Sym *isymbuf, *isymend;
1671 Elf_Internal_Sym *isym;
1672 int symcount;
1673 int offset;
1674 bfd_vma src, dest;
1675
1676 /* We only do this once per section. We may be able to delete some code
1677 by running multiple passes, but it is not worth it. */
1678 *again = FALSE;
1679
1680 /* Only do this for a text section. */
1681 if (link_info->relocatable
1682 || (sec->flags & SEC_RELOC) == 0
1683 || (sec->reloc_count == 0)
1684 || (sec->flags & SEC_CODE) == 0)
1685 return TRUE;
1686
1687 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
1688
1689 /* If this is the first time we have been called for this section,
1690 initialize the cooked size. */
1691 if (sec->size == 0)
1692 sec->size = sec->rawsize;
1693
1694 /* Get symbols for this section. */
1695 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1696 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1697 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
1698 if (isymbuf == NULL)
1699 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
1700 0, NULL, NULL, NULL);
1701 BFD_ASSERT (isymbuf != NULL);
1702
1703 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1704 if (internal_relocs == NULL)
1705 goto error_return;
1706 if (! link_info->keep_memory)
1707 free_relocs = internal_relocs;
1708
1709 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
1710 * sizeof (struct relax_table));
1711 if (sec->relax == NULL)
1712 goto error_return;
1713 sec->relax_count = 0;
1714
1715 irelend = internal_relocs + sec->reloc_count;
1716 rel_count = 0;
1717 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1718 {
1719 bfd_vma symval;
1720 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
1721 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 ))
1722 continue; /* Can't delete this reloc. */
1723
1724 /* Get the section contents. */
1725 if (contents == NULL)
1726 {
1727 if (elf_section_data (sec)->this_hdr.contents != NULL)
1728 contents = elf_section_data (sec)->this_hdr.contents;
1729 else
1730 {
1731 contents = (bfd_byte *) bfd_malloc (sec->size);
1732 if (contents == NULL)
1733 goto error_return;
1734 free_contents = contents;
1735
1736 if (!bfd_get_section_contents (abfd, sec, contents,
1737 (file_ptr) 0, sec->size))
1738 goto error_return;
1739 elf_section_data (sec)->this_hdr.contents = contents;
1740 }
1741 }
1742
1743 /* Get the value of the symbol referred to by the reloc. */
1744 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1745 {
1746 /* A local symbol. */
1747 asection *sym_sec;
1748
1749 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1750 if (isym->st_shndx == SHN_UNDEF)
1751 sym_sec = bfd_und_section_ptr;
1752 else if (isym->st_shndx == SHN_ABS)
1753 sym_sec = bfd_abs_section_ptr;
1754 else if (isym->st_shndx == SHN_COMMON)
1755 sym_sec = bfd_com_section_ptr;
1756 else
1757 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1758
1759 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
1760 }
1761 else
1762 {
1763 unsigned long indx;
1764 struct elf_link_hash_entry *h;
1765
1766 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1767 h = elf_sym_hashes (abfd)[indx];
1768 BFD_ASSERT (h != NULL);
1769
1770 if (h->root.type != bfd_link_hash_defined
1771 && h->root.type != bfd_link_hash_defweak)
1772 /* This appears to be a reference to an undefined
1773 symbol. Just ignore it--it will be caught by the
1774 regular reloc processing. */
1775 continue;
1776
1777 symval = (h->root.u.def.value
1778 + h->root.u.def.section->output_section->vma
1779 + h->root.u.def.section->output_offset);
1780 }
1781
1782 /* If this is a PC-relative reloc, subtract the instr offset from
1783 the symbol value. */
1784 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
1785 {
1786 symval = symval + irel->r_addend
1787 - (irel->r_offset
1788 + sec->output_section->vma
1789 + sec->output_offset);
1790 }
1791 else
1792 symval += irel->r_addend;
1793
1794 if ((symval & 0xffff8000) == 0
1795 || (symval & 0xffff8000) == 0xffff8000)
1796 {
1797 /* We can delete this instruction. */
1798 sec->relax[sec->relax_count].addr = irel->r_offset;
1799 sec->relax[sec->relax_count].size = INST_WORD_SIZE;
1800 sec->relax_count++;
1801
1802 /* Rewrite relocation type. */
1803 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1804 {
1805 case R_MICROBLAZE_64_PCREL:
1806 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1807 (int) R_MICROBLAZE_32_PCREL_LO);
1808 break;
1809 case R_MICROBLAZE_64:
1810 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1811 (int) R_MICROBLAZE_32_LO);
1812 break;
1813 default:
1814 /* Cannot happen. */
1815 BFD_ASSERT (FALSE);
1816 }
1817 }
1818 } /* Loop through all relocations. */
1819
1820 /* Loop through the relocs again, and see if anything needs to change. */
1821 if (sec->relax_count > 0)
1822 {
1823 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1824 rel_count = 0;
1825 sec->relax[sec->relax_count].addr = sec->size;
1826
1827 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1828 {
1829 bfd_vma nraddr;
1830
1831 /* Get the new reloc address. */
1832 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec);
1833 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1834 {
1835 default:
1836 break;
1837 case R_MICROBLAZE_64_PCREL:
1838 break;
1839 case R_MICROBLAZE_64:
1840 case R_MICROBLAZE_32_LO:
1841 /* If this reloc is against a symbol defined in this
1842 section, we must check the addend to see it will put the value in
1843 range to be adjusted, and hence must be changed. */
1844 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1845 {
1846 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1847 /* Only handle relocs against .text. */
1848 if (isym->st_shndx == shndx
1849 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
1850 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec);
1851 }
1852 break;
1853 case R_MICROBLAZE_NONE:
1854 {
1855 /* This was a PC-relative instruction that was
1856 completely resolved. */
1857 int sfix, efix;
1858 bfd_vma target_address;
1859 target_address = irel->r_addend + irel->r_offset;
1860 sfix = calc_fixup (irel->r_offset, 0, sec);
1861 efix = calc_fixup (target_address, 0, sec);
1862 irel->r_addend -= (efix - sfix);
1863 /* Should use HOWTO. */
1864 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset,
1865 irel->r_addend);
1866 }
1867 break;
1868 case R_MICROBLAZE_64_NONE:
1869 {
1870 /* This was a PC-relative 64-bit instruction that was
1871 completely resolved. */
1872 int sfix, efix;
1873 bfd_vma target_address;
1874 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
1875 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec);
1876 efix = calc_fixup (target_address, 0, sec);
1877 irel->r_addend -= (efix - sfix);
1878 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset
1879 + INST_WORD_SIZE, irel->r_addend);
1880 }
1881 break;
1882 }
1883 irel->r_offset = nraddr;
1884 } /* Change all relocs in this section. */
1885
1886 /* Look through all other sections. */
1887 for (o = abfd->sections; o != NULL; o = o->next)
1888 {
1889 Elf_Internal_Rela *irelocs;
1890 Elf_Internal_Rela *irelscan, *irelscanend;
1891 bfd_byte *ocontents;
1892
1893 if (o == sec
1894 || (o->flags & SEC_RELOC) == 0
1895 || o->reloc_count == 0)
1896 continue;
1897
1898 /* We always cache the relocs. Perhaps, if info->keep_memory is
1899 FALSE, we should free them, if we are permitted to. */
1900
1901 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
1902 if (irelocs == NULL)
1903 goto error_return;
1904
1905 ocontents = NULL;
1906 irelscanend = irelocs + o->reloc_count;
1907 for (irelscan = irelocs; irelscan < irelscanend; irelscan++)
1908 {
1909 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
1910 {
1911 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1912
1913 /* Look at the reloc only if the value has been resolved. */
1914 if (isym->st_shndx == shndx
1915 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1916 {
1917 if (ocontents == NULL)
1918 {
1919 if (elf_section_data (o)->this_hdr.contents != NULL)
1920 ocontents = elf_section_data (o)->this_hdr.contents;
1921 else
1922 {
1923 /* We always cache the section contents.
1924 Perhaps, if info->keep_memory is FALSE, we
1925 should free them, if we are permitted to. */
1926 if (o->rawsize == 0)
1927 o->rawsize = o->size;
1928 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1929 if (ocontents == NULL)
1930 goto error_return;
1931 if (!bfd_get_section_contents (abfd, o, ocontents,
1932 (file_ptr) 0,
1933 o->rawsize))
1934 goto error_return;
1935 elf_section_data (o)->this_hdr.contents = ocontents;
1936 }
1937
1938 }
1939 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec);
1940 }
1941 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
1942 {
1943 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1944
1945 /* Look at the reloc only if the value has been resolved. */
1946 if (ocontents == NULL)
1947 {
1948 if (elf_section_data (o)->this_hdr.contents != NULL)
1949 ocontents = elf_section_data (o)->this_hdr.contents;
1950 else
1951 {
1952 /* We always cache the section contents.
1953 Perhaps, if info->keep_memory is FALSE, we
1954 should free them, if we are permitted to. */
1955
1956 if (o->rawsize == 0)
1957 o->rawsize = o->size;
1958 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1959 if (ocontents == NULL)
1960 goto error_return;
1961 if (!bfd_get_section_contents (abfd, o, ocontents,
1962 (file_ptr) 0,
1963 o->rawsize))
1964 goto error_return;
1965 elf_section_data (o)->this_hdr.contents = ocontents;
1966 }
1967 }
1968 irelscan->r_addend -= calc_fixup (irel->r_addend
1969 + isym->st_value,
1970 0,
1971 sec);
1972 }
1973 }
1974 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
1975 || (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO))
1976 {
1977 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1978
1979 /* Look at the reloc only if the value has been resolved. */
1980 if (isym->st_shndx == shndx
1981 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1982 {
1983 bfd_vma immediate;
1984 bfd_vma target_address;
1985
1986 if (ocontents == NULL)
1987 {
1988 if (elf_section_data (o)->this_hdr.contents != NULL)
1989 ocontents = elf_section_data (o)->this_hdr.contents;
1990 else
1991 {
1992 /* We always cache the section contents.
1993 Perhaps, if info->keep_memory is FALSE, we
1994 should free them, if we are permitted to. */
1995 if (o->rawsize == 0)
1996 o->rawsize = o->size;
1997 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1998 if (ocontents == NULL)
1999 goto error_return;
2000 if (!bfd_get_section_contents (abfd, o, ocontents,
2001 (file_ptr) 0,
2002 o->rawsize))
2003 goto error_return;
2004 elf_section_data (o)->this_hdr.contents = ocontents;
2005 }
2006 }
2007
2008 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
2009 immediate = instr & 0x0000ffff;
2010 target_address = immediate;
2011 offset = calc_fixup (target_address, 0, sec);
2012 immediate -= offset;
2013 irelscan->r_addend -= offset;
2014 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset,
2015 irelscan->r_addend);
2016 }
2017 }
2018
2019 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64)
2020 {
2021 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2022
2023 /* Look at the reloc only if the value has been resolved. */
2024 if (isym->st_shndx == shndx
2025 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2026 {
2027 bfd_vma immediate;
2028
2029 if (ocontents == NULL)
2030 {
2031 if (elf_section_data (o)->this_hdr.contents != NULL)
2032 ocontents = elf_section_data (o)->this_hdr.contents;
2033 else
2034 {
2035 /* We always cache the section contents.
2036 Perhaps, if info->keep_memory is FALSE, we
2037 should free them, if we are permitted to. */
2038
2039 if (o->rawsize == 0)
2040 o->rawsize = o->size;
2041 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2042 if (ocontents == NULL)
2043 goto error_return;
2044 if (!bfd_get_section_contents (abfd, o, ocontents,
2045 (file_ptr) 0,
2046 o->rawsize))
2047 goto error_return;
2048 elf_section_data (o)->this_hdr.contents = ocontents;
2049 }
2050 }
2051 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2052 + irelscan->r_offset);
2053 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2054 + irelscan->r_offset
2055 + INST_WORD_SIZE);
2056 immediate = (instr_hi & 0x0000ffff) << 16;
2057 immediate |= (instr_lo & 0x0000ffff);
2058 offset = calc_fixup (irelscan->r_addend, 0, sec);
2059 immediate -= offset;
2060 irelscan->r_addend -= offset;
2061 }
2062 }
2063 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
2064 {
2065 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2066
2067 /* Look at the reloc only if the value has been resolved. */
2068 if (isym->st_shndx == shndx
2069 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2070 {
2071 bfd_vma immediate;
2072 bfd_vma target_address;
2073
2074 if (ocontents == NULL)
2075 {
2076 if (elf_section_data (o)->this_hdr.contents != NULL)
2077 ocontents = elf_section_data (o)->this_hdr.contents;
2078 else
2079 {
2080 /* We always cache the section contents.
2081 Perhaps, if info->keep_memory is FALSE, we
2082 should free them, if we are permitted to. */
2083 if (o->rawsize == 0)
2084 o->rawsize = o->size;
2085 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2086 if (ocontents == NULL)
2087 goto error_return;
2088 if (!bfd_get_section_contents (abfd, o, ocontents,
2089 (file_ptr) 0,
2090 o->rawsize))
2091 goto error_return;
2092 elf_section_data (o)->this_hdr.contents = ocontents;
2093 }
2094 }
2095 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2096 + irelscan->r_offset);
2097 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2098 + irelscan->r_offset
2099 + INST_WORD_SIZE);
2100 immediate = (instr_hi & 0x0000ffff) << 16;
2101 immediate |= (instr_lo & 0x0000ffff);
2102 target_address = immediate;
2103 offset = calc_fixup (target_address, 0, sec);
2104 immediate -= offset;
2105 irelscan->r_addend -= offset;
2106 microblaze_bfd_write_imm_value_64 (abfd, ocontents
2107 + irelscan->r_offset, immediate);
2108 }
2109 }
2110 }
2111 }
2112
2113 /* Adjust the local symbols defined in this section. */
2114 isymend = isymbuf + symtab_hdr->sh_info;
2115 for (isym = isymbuf; isym < isymend; isym++)
2116 {
2117 if (isym->st_shndx == shndx)
2118 {
2119 isym->st_value -= calc_fixup (isym->st_value, 0, sec);
2120 if (isym->st_size)
2121 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec);
2122 }
2123 }
2124
2125 /* Now adjust the global symbols defined in this section. */
2126 isym = isymbuf + symtab_hdr->sh_info;
2127 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info;
2128 for (sym_index = 0; sym_index < symcount; sym_index++)
2129 {
2130 sym_hash = elf_sym_hashes (abfd)[sym_index];
2131 if ((sym_hash->root.type == bfd_link_hash_defined
2132 || sym_hash->root.type == bfd_link_hash_defweak)
2133 && sym_hash->root.u.def.section == sec)
2134 {
2135 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
2136 0, sec);
2137 if (sym_hash->size)
2138 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value,
2139 sym_hash->size, sec);
2140 }
2141 }
2142
2143 /* Physically move the code and change the cooked size. */
2144 dest = sec->relax[0].addr;
2145 for (i = 0; i < sec->relax_count; i++)
2146 {
2147 int len;
2148 src = sec->relax[i].addr + sec->relax[i].size;
2149 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
2150
2151 memmove (contents + dest, contents + src, len);
2152 sec->size -= sec->relax[i].size;
2153 dest += len;
2154 }
2155
2156 elf_section_data (sec)->relocs = internal_relocs;
2157 free_relocs = NULL;
2158
2159 elf_section_data (sec)->this_hdr.contents = contents;
2160 free_contents = NULL;
2161
2162 symtab_hdr->contents = (bfd_byte *) isymbuf;
2163 }
2164
2165 if (free_relocs != NULL)
2166 {
2167 free (free_relocs);
2168 free_relocs = NULL;
2169 }
2170
2171 if (free_contents != NULL)
2172 {
2173 if (!link_info->keep_memory)
2174 free (free_contents);
2175 else
2176 /* Cache the section contents for elf_link_input_bfd. */
2177 elf_section_data (sec)->this_hdr.contents = contents;
2178 free_contents = NULL;
2179 }
2180
2181 if (sec->relax_count == 0)
2182 {
2183 *again = FALSE;
2184 free (sec->relax);
2185 sec->relax = NULL;
2186 }
2187 else
2188 *again = TRUE;
2189 return TRUE;
2190
2191 error_return:
2192 if (free_relocs != NULL)
2193 free (free_relocs);
2194 if (free_contents != NULL)
2195 free (free_contents);
2196 if (sec->relax != NULL)
2197 {
2198 free (sec->relax);
2199 sec->relax = NULL;
2200 sec->relax_count = 0;
2201 }
2202 return FALSE;
2203 }
2204
2205 /* Return the section that should be marked against GC for a given
2206 relocation. */
2207
2208 static asection *
2209 microblaze_elf_gc_mark_hook (asection *sec,
2210 struct bfd_link_info * info,
2211 Elf_Internal_Rela * rel,
2212 struct elf_link_hash_entry * h,
2213 Elf_Internal_Sym * sym)
2214 {
2215 if (h != NULL)
2216 switch (ELF32_R_TYPE (rel->r_info))
2217 {
2218 case R_MICROBLAZE_GNU_VTINHERIT:
2219 case R_MICROBLAZE_GNU_VTENTRY:
2220 return NULL;
2221 }
2222
2223 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2224 }
2225
2226 /* Update the got entry reference counts for the section being removed. */
2227
2228 static bfd_boolean
2229 microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
2230 struct bfd_link_info * info ATTRIBUTE_UNUSED,
2231 asection * sec ATTRIBUTE_UNUSED,
2232 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
2233 {
2234 return TRUE;
2235 }
2236
2237 /* PIC support. */
2238
2239 #define PLT_ENTRY_SIZE 16
2240
2241 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2242 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2243 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2244 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2245 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2246
2247 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
2248 shortcuts to them in our hash table. */
2249
2250 static bfd_boolean
2251 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2252 {
2253 struct elf32_mb_link_hash_table *htab;
2254
2255 if (! _bfd_elf_create_got_section (dynobj, info))
2256 return FALSE;
2257 htab = elf32_mb_hash_table (info);
2258 if (htab == NULL)
2259 return FALSE;
2260
2261 htab->sgot = bfd_get_linker_section (dynobj, ".got");
2262 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2263 if (!htab->sgot || !htab->sgotplt)
2264 return FALSE;
2265
2266 if ((htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got")) == NULL)
2267 htab->srelgot = bfd_make_section_anyway (dynobj, ".rela.got");
2268 if (htab->srelgot == NULL
2269 || ! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
2270 | SEC_LOAD
2271 | SEC_HAS_CONTENTS
2272 | SEC_IN_MEMORY
2273 | SEC_LINKER_CREATED
2274 | SEC_READONLY)
2275 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2276 return FALSE;
2277 return TRUE;
2278 }
2279
2280 static bfd_boolean
2281 update_local_sym_info (bfd *abfd,
2282 Elf_Internal_Shdr *symtab_hdr,
2283 unsigned long r_symndx,
2284 unsigned int tls_type)
2285 {
2286 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2287 unsigned char *local_got_tls_masks;
2288
2289 if (local_got_refcounts == NULL)
2290 {
2291 bfd_size_type size = symtab_hdr->sh_info;
2292
2293 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks));
2294 local_got_refcounts = bfd_zalloc (abfd, size);
2295 if (local_got_refcounts == NULL)
2296 return FALSE;
2297 elf_local_got_refcounts (abfd) = local_got_refcounts;
2298 }
2299
2300 local_got_tls_masks =
2301 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info);
2302 local_got_tls_masks[r_symndx] |= tls_type;
2303 local_got_refcounts[r_symndx] += 1;
2304
2305 return TRUE;
2306 }
2307 /* Look through the relocs for a section during the first phase. */
2308
2309 static bfd_boolean
2310 microblaze_elf_check_relocs (bfd * abfd,
2311 struct bfd_link_info * info,
2312 asection * sec,
2313 const Elf_Internal_Rela * relocs)
2314 {
2315 Elf_Internal_Shdr * symtab_hdr;
2316 struct elf_link_hash_entry ** sym_hashes;
2317 struct elf_link_hash_entry ** sym_hashes_end;
2318 const Elf_Internal_Rela * rel;
2319 const Elf_Internal_Rela * rel_end;
2320 struct elf32_mb_link_hash_table *htab;
2321 asection *sreloc = NULL;
2322
2323 if (info->relocatable)
2324 return TRUE;
2325
2326 htab = elf32_mb_hash_table (info);
2327 if (htab == NULL)
2328 return FALSE;
2329
2330 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2331 sym_hashes = elf_sym_hashes (abfd);
2332 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2333 if (!elf_bad_symtab (abfd))
2334 sym_hashes_end -= symtab_hdr->sh_info;
2335
2336 rel_end = relocs + sec->reloc_count;
2337
2338 for (rel = relocs; rel < rel_end; rel++)
2339 {
2340 unsigned int r_type;
2341 struct elf_link_hash_entry * h;
2342 unsigned long r_symndx;
2343 unsigned char tls_type = 0;
2344
2345 r_symndx = ELF32_R_SYM (rel->r_info);
2346 r_type = ELF32_R_TYPE (rel->r_info);
2347
2348 if (r_symndx < symtab_hdr->sh_info)
2349 h = NULL;
2350 else
2351 {
2352 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2353
2354 /* PR15323, ref flags aren't set for references in the same
2355 object. */
2356 h->root.non_ir_ref = 1;
2357 }
2358
2359 switch (r_type)
2360 {
2361 /* This relocation describes the C++ object vtable hierarchy.
2362 Reconstruct it for later use during GC. */
2363 case R_MICROBLAZE_GNU_VTINHERIT:
2364 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2365 return FALSE;
2366 break;
2367
2368 /* This relocation describes which C++ vtable entries are actually
2369 used. Record for later use during GC. */
2370 case R_MICROBLAZE_GNU_VTENTRY:
2371 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2372 return FALSE;
2373 break;
2374
2375 /* This relocation requires .plt entry. */
2376 case R_MICROBLAZE_PLT_64:
2377 if (h != NULL)
2378 {
2379 h->needs_plt = 1;
2380 h->plt.refcount += 1;
2381 }
2382 break;
2383
2384 /* This relocation requires .got entry. */
2385 case R_MICROBLAZE_TLSGD:
2386 tls_type |= (TLS_TLS | TLS_GD);
2387 goto dogottls;
2388 case R_MICROBLAZE_TLSLD:
2389 tls_type |= (TLS_TLS | TLS_LD);
2390 dogottls:
2391 sec->has_tls_reloc = 1;
2392 case R_MICROBLAZE_GOT_64:
2393 if (htab->sgot == NULL)
2394 {
2395 if (htab->elf.dynobj == NULL)
2396 htab->elf.dynobj = abfd;
2397 if (!create_got_section (htab->elf.dynobj, info))
2398 return FALSE;
2399 }
2400 if (h != NULL)
2401 {
2402 h->got.refcount += 1;
2403 elf32_mb_hash_entry (h)->tls_mask |= tls_type;
2404 }
2405 else
2406 {
2407 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) )
2408 return FALSE;
2409 }
2410 break;
2411
2412 case R_MICROBLAZE_64:
2413 case R_MICROBLAZE_64_PCREL:
2414 case R_MICROBLAZE_32:
2415 {
2416 if (h != NULL && !info->shared)
2417 {
2418 /* we may need a copy reloc. */
2419 h->non_got_ref = 1;
2420
2421 /* we may also need a .plt entry. */
2422 h->plt.refcount += 1;
2423 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
2424 h->pointer_equality_needed = 1;
2425 }
2426
2427
2428 /* If we are creating a shared library, and this is a reloc
2429 against a global symbol, or a non PC relative reloc
2430 against a local symbol, then we need to copy the reloc
2431 into the shared library. However, if we are linking with
2432 -Bsymbolic, we do not need to copy a reloc against a
2433 global symbol which is defined in an object we are
2434 including in the link (i.e., DEF_REGULAR is set). At
2435 this point we have not seen all the input files, so it is
2436 possible that DEF_REGULAR is not set now but will be set
2437 later (it is never cleared). In case of a weak definition,
2438 DEF_REGULAR may be cleared later by a strong definition in
2439 a shared library. We account for that possibility below by
2440 storing information in the relocs_copied field of the hash
2441 table entry. A similar situation occurs when creating
2442 shared libraries and symbol visibility changes render the
2443 symbol local.
2444
2445 If on the other hand, we are creating an executable, we
2446 may need to keep relocations for symbols satisfied by a
2447 dynamic library if we manage to avoid copy relocs for the
2448 symbol. */
2449
2450 if ((info->shared
2451 && (sec->flags & SEC_ALLOC) != 0
2452 && (r_type != R_MICROBLAZE_64_PCREL
2453 || (h != NULL
2454 && (! info->symbolic
2455 || h->root.type == bfd_link_hash_defweak
2456 || !h->def_regular))))
2457 || (!info->shared
2458 && (sec->flags & SEC_ALLOC) != 0
2459 && h != NULL
2460 && (h->root.type == bfd_link_hash_defweak
2461 || !h->def_regular)))
2462 {
2463 struct elf32_mb_dyn_relocs *p;
2464 struct elf32_mb_dyn_relocs **head;
2465
2466 /* When creating a shared object, we must copy these
2467 relocs into the output file. We create a reloc
2468 section in dynobj and make room for the reloc. */
2469
2470 if (sreloc == NULL)
2471 {
2472 bfd *dynobj;
2473
2474 if (htab->elf.dynobj == NULL)
2475 htab->elf.dynobj = abfd;
2476 dynobj = htab->elf.dynobj;
2477
2478 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj,
2479 2, abfd, 1);
2480 if (sreloc == NULL)
2481 return FALSE;
2482 }
2483
2484 /* If this is a global symbol, we count the number of
2485 relocations we need for this symbol. */
2486 if (h != NULL)
2487 head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs;
2488 else
2489 {
2490 /* Track dynamic relocs needed for local syms too.
2491 We really need local syms available to do this
2492 easily. Oh well. */
2493
2494 asection *s;
2495 Elf_Internal_Sym *isym;
2496 void *vpp;
2497
2498 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
2499 abfd, r_symndx);
2500 if (isym == NULL)
2501 return FALSE;
2502
2503 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2504 if (s == NULL)
2505 return FALSE;
2506
2507 vpp = &elf_section_data (s)->local_dynrel;
2508 head = (struct elf32_mb_dyn_relocs **) vpp;
2509 }
2510
2511 p = *head;
2512 if (p == NULL || p->sec != sec)
2513 {
2514 bfd_size_type amt = sizeof *p;
2515 p = ((struct elf32_mb_dyn_relocs *)
2516 bfd_alloc (htab->elf.dynobj, amt));
2517 if (p == NULL)
2518 return FALSE;
2519 p->next = *head;
2520 *head = p;
2521 p->sec = sec;
2522 p->count = 0;
2523 p->pc_count = 0;
2524 }
2525
2526 p->count += 1;
2527 if (r_type == R_MICROBLAZE_64_PCREL)
2528 p->pc_count += 1;
2529 }
2530 }
2531 break;
2532 }
2533 }
2534
2535 return TRUE;
2536 }
2537
2538 static bfd_boolean
2539 microblaze_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2540 {
2541 struct elf32_mb_link_hash_table *htab;
2542
2543 htab = elf32_mb_hash_table (info);
2544 if (htab == NULL)
2545 return FALSE;
2546
2547 if (!htab->sgot && !create_got_section (dynobj, info))
2548 return FALSE;
2549
2550 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2551 return FALSE;
2552
2553 htab->splt = bfd_get_linker_section (dynobj, ".plt");
2554 htab->srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
2555 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
2556 if (!info->shared)
2557 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
2558
2559 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2560 || (!info->shared && !htab->srelbss))
2561 abort ();
2562
2563 return TRUE;
2564 }
2565
2566 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2567
2568 static void
2569 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
2570 struct elf_link_hash_entry *dir,
2571 struct elf_link_hash_entry *ind)
2572 {
2573 struct elf32_mb_link_hash_entry *edir, *eind;
2574
2575 edir = (struct elf32_mb_link_hash_entry *) dir;
2576 eind = (struct elf32_mb_link_hash_entry *) ind;
2577
2578 if (eind->dyn_relocs != NULL)
2579 {
2580 if (edir->dyn_relocs != NULL)
2581 {
2582 struct elf32_mb_dyn_relocs **pp;
2583 struct elf32_mb_dyn_relocs *p;
2584
2585 if (ind->root.type == bfd_link_hash_indirect)
2586 abort ();
2587
2588 /* Add reloc counts against the weak sym to the strong sym
2589 list. Merge any entries against the same section. */
2590 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2591 {
2592 struct elf32_mb_dyn_relocs *q;
2593
2594 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2595 if (q->sec == p->sec)
2596 {
2597 q->pc_count += p->pc_count;
2598 q->count += p->count;
2599 *pp = p->next;
2600 break;
2601 }
2602 if (q == NULL)
2603 pp = &p->next;
2604 }
2605 *pp = edir->dyn_relocs;
2606 }
2607
2608 edir->dyn_relocs = eind->dyn_relocs;
2609 eind->dyn_relocs = NULL;
2610 }
2611
2612 edir->tls_mask |= eind->tls_mask;
2613
2614 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2615 }
2616
2617 static bfd_boolean
2618 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2619 struct elf_link_hash_entry *h)
2620 {
2621 struct elf32_mb_link_hash_table *htab;
2622 struct elf32_mb_link_hash_entry * eh;
2623 struct elf32_mb_dyn_relocs *p;
2624 asection *sdynbss, *s;
2625 unsigned int power_of_two;
2626 bfd *dynobj;
2627
2628 htab = elf32_mb_hash_table (info);
2629 if (htab == NULL)
2630 return FALSE;
2631
2632 /* If this is a function, put it in the procedure linkage table. We
2633 will fill in the contents of the procedure linkage table later,
2634 when we know the address of the .got section. */
2635 if (h->type == STT_FUNC
2636 || h->needs_plt)
2637 {
2638 if (h->plt.refcount <= 0
2639 || SYMBOL_CALLS_LOCAL (info, h)
2640 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2641 && h->root.type == bfd_link_hash_undefweak))
2642 {
2643 /* This case can occur if we saw a PLT reloc in an input
2644 file, but the symbol was never referred to by a dynamic
2645 object, or if all references were garbage collected. In
2646 such a case, we don't actually need to build a procedure
2647 linkage table, and we can just do a PC32 reloc instead. */
2648 h->plt.offset = (bfd_vma) -1;
2649 h->needs_plt = 0;
2650 }
2651
2652 return TRUE;
2653 }
2654 else
2655 /* It's possible that we incorrectly decided a .plt reloc was
2656 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2657 check_relocs. We can't decide accurately between function and
2658 non-function syms in check-relocs; Objects loaded later in
2659 the link may change h->type. So fix it now. */
2660 h->plt.offset = (bfd_vma) -1;
2661
2662 /* If this is a weak symbol, and there is a real definition, the
2663 processor independent code will have arranged for us to see the
2664 real definition first, and we can just use the same value. */
2665 if (h->u.weakdef != NULL)
2666 {
2667 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2668 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2669 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2670 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2671 return TRUE;
2672 }
2673
2674 /* This is a reference to a symbol defined by a dynamic object which
2675 is not a function. */
2676
2677 /* If we are creating a shared library, we must presume that the
2678 only references to the symbol are via the global offset table.
2679 For such cases we need not do anything here; the relocations will
2680 be handled correctly by relocate_section. */
2681 if (info->shared)
2682 return TRUE;
2683
2684 /* If there are no references to this symbol that do not use the
2685 GOT, we don't need to generate a copy reloc. */
2686 if (!h->non_got_ref)
2687 return TRUE;
2688
2689 /* If -z nocopyreloc was given, we won't generate them either. */
2690 if (info->nocopyreloc)
2691 {
2692 h->non_got_ref = 0;
2693 return TRUE;
2694 }
2695
2696 eh = (struct elf32_mb_link_hash_entry *) h;
2697 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2698 {
2699 s = p->sec->output_section;
2700 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2701 break;
2702 }
2703
2704 /* If we didn't find any dynamic relocs in read-only sections, then
2705 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2706 if (p == NULL)
2707 {
2708 h->non_got_ref = 0;
2709 return TRUE;
2710 }
2711
2712 /* We must allocate the symbol in our .dynbss section, which will
2713 become part of the .bss section of the executable. There will be
2714 an entry for this symbol in the .dynsym section. The dynamic
2715 object will contain position independent code, so all references
2716 from the dynamic object to this symbol will go through the global
2717 offset table. The dynamic linker will use the .dynsym entry to
2718 determine the address it must put in the global offset table, so
2719 both the dynamic object and the regular object will refer to the
2720 same memory location for the variable. */
2721
2722 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2723 to copy the initial value out of the dynamic object and into the
2724 runtime process image. */
2725 dynobj = elf_hash_table (info)->dynobj;
2726 BFD_ASSERT (dynobj != NULL);
2727 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2728 {
2729 htab->srelbss->size += sizeof (Elf32_External_Rela);
2730 h->needs_copy = 1;
2731 }
2732
2733 /* We need to figure out the alignment required for this symbol. I
2734 have no idea how ELF linkers handle this. */
2735 power_of_two = bfd_log2 (h->size);
2736 if (power_of_two > 3)
2737 power_of_two = 3;
2738
2739 sdynbss = htab->sdynbss;
2740 /* Apply the required alignment. */
2741 sdynbss->size = BFD_ALIGN (sdynbss->size, (bfd_size_type) (1 << power_of_two));
2742 if (power_of_two > bfd_get_section_alignment (dynobj, sdynbss))
2743 {
2744 if (! bfd_set_section_alignment (dynobj, sdynbss, power_of_two))
2745 return FALSE;
2746 }
2747
2748 /* Define the symbol as being at this point in the section. */
2749 h->root.u.def.section = sdynbss;
2750 h->root.u.def.value = sdynbss->size;
2751
2752 /* Increment the section size to make room for the symbol. */
2753 sdynbss->size += h->size;
2754 return TRUE;
2755 }
2756
2757 /* Allocate space in .plt, .got and associated reloc sections for
2758 dynamic relocs. */
2759
2760 static bfd_boolean
2761 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
2762 {
2763 struct bfd_link_info *info;
2764 struct elf32_mb_link_hash_table *htab;
2765 struct elf32_mb_link_hash_entry *eh;
2766 struct elf32_mb_dyn_relocs *p;
2767
2768 if (h->root.type == bfd_link_hash_indirect)
2769 return TRUE;
2770
2771 info = (struct bfd_link_info *) dat;
2772 htab = elf32_mb_hash_table (info);
2773 if (htab == NULL)
2774 return FALSE;
2775
2776 if (htab->elf.dynamic_sections_created
2777 && h->plt.refcount > 0)
2778 {
2779 /* Make sure this symbol is output as a dynamic symbol.
2780 Undefined weak syms won't yet be marked as dynamic. */
2781 if (h->dynindx == -1
2782 && !h->forced_local)
2783 {
2784 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2785 return FALSE;
2786 }
2787
2788 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
2789 {
2790 asection *s = htab->splt;
2791
2792 /* The first entry in .plt is reserved. */
2793 if (s->size == 0)
2794 s->size = PLT_ENTRY_SIZE;
2795
2796 h->plt.offset = s->size;
2797
2798 /* If this symbol is not defined in a regular file, and we are
2799 not generating a shared library, then set the symbol to this
2800 location in the .plt. This is required to make function
2801 pointers compare as equal between the normal executable and
2802 the shared library. */
2803 if (! info->shared
2804 && !h->def_regular)
2805 {
2806 h->root.u.def.section = s;
2807 h->root.u.def.value = h->plt.offset;
2808 }
2809
2810 /* Make room for this entry. */
2811 s->size += PLT_ENTRY_SIZE;
2812
2813 /* We also need to make an entry in the .got.plt section, which
2814 will be placed in the .got section by the linker script. */
2815 htab->sgotplt->size += 4;
2816
2817 /* We also need to make an entry in the .rel.plt section. */
2818 htab->srelplt->size += sizeof (Elf32_External_Rela);
2819 }
2820 else
2821 {
2822 h->plt.offset = (bfd_vma) -1;
2823 h->needs_plt = 0;
2824 }
2825 }
2826 else
2827 {
2828 h->plt.offset = (bfd_vma) -1;
2829 h->needs_plt = 0;
2830 }
2831
2832 eh = (struct elf32_mb_link_hash_entry *) h;
2833 if (h->got.refcount > 0)
2834 {
2835 unsigned int need;
2836 asection *s;
2837
2838 /* Make sure this symbol is output as a dynamic symbol.
2839 Undefined weak syms won't yet be marked as dynamic. */
2840 if (h->dynindx == -1
2841 && !h->forced_local)
2842 {
2843 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2844 return FALSE;
2845 }
2846
2847 need = 0;
2848 if ((eh->tls_mask & TLS_TLS) != 0)
2849 {
2850 /* Handle TLS Symbol */
2851 if ((eh->tls_mask & TLS_LD) != 0)
2852 {
2853 if (!eh->elf.def_dynamic)
2854 /* We'll just use htab->tlsld_got.offset. This should
2855 always be the case. It's a little odd if we have
2856 a local dynamic reloc against a non-local symbol. */
2857 htab->tlsld_got.refcount += 1;
2858 else
2859 need += 8;
2860 }
2861 if ((eh->tls_mask & TLS_GD) != 0)
2862 need += 8;
2863 }
2864 else
2865 {
2866 /* Regular (non-TLS) symbol */
2867 need += 4;
2868 }
2869 if (need == 0)
2870 {
2871 h->got.offset = (bfd_vma) -1;
2872 }
2873 else
2874 {
2875 s = htab->sgot;
2876 h->got.offset = s->size;
2877 s->size += need;
2878 htab->srelgot->size += need * (sizeof (Elf32_External_Rela) / 4);
2879 }
2880 }
2881 else
2882 h->got.offset = (bfd_vma) -1;
2883
2884 if (eh->dyn_relocs == NULL)
2885 return TRUE;
2886
2887 /* In the shared -Bsymbolic case, discard space allocated for
2888 dynamic pc-relative relocs against symbols which turn out to be
2889 defined in regular objects. For the normal shared case, discard
2890 space for pc-relative relocs that have become local due to symbol
2891 visibility changes. */
2892
2893 if (info->shared)
2894 {
2895 if (h->def_regular
2896 && (h->forced_local
2897 || info->symbolic))
2898 {
2899 struct elf32_mb_dyn_relocs **pp;
2900
2901 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2902 {
2903 p->count -= p->pc_count;
2904 p->pc_count = 0;
2905 if (p->count == 0)
2906 *pp = p->next;
2907 else
2908 pp = &p->next;
2909 }
2910 }
2911 }
2912 else
2913 {
2914 /* For the non-shared case, discard space for relocs against
2915 symbols which turn out to need copy relocs or are not
2916 dynamic. */
2917
2918 if (!h->non_got_ref
2919 && ((h->def_dynamic
2920 && !h->def_regular)
2921 || (htab->elf.dynamic_sections_created
2922 && (h->root.type == bfd_link_hash_undefweak
2923 || h->root.type == bfd_link_hash_undefined))))
2924 {
2925 /* Make sure this symbol is output as a dynamic symbol.
2926 Undefined weak syms won't yet be marked as dynamic. */
2927 if (h->dynindx == -1
2928 && !h->forced_local)
2929 {
2930 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2931 return FALSE;
2932 }
2933
2934 /* If that succeeded, we know we'll be keeping all the
2935 relocs. */
2936 if (h->dynindx != -1)
2937 goto keep;
2938 }
2939
2940 eh->dyn_relocs = NULL;
2941
2942 keep: ;
2943 }
2944
2945 /* Finally, allocate space. */
2946 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2947 {
2948 asection *sreloc = elf_section_data (p->sec)->sreloc;
2949 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2950 }
2951
2952 return TRUE;
2953 }
2954
2955 /* Set the sizes of the dynamic sections. */
2956
2957 static bfd_boolean
2958 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2959 struct bfd_link_info *info)
2960 {
2961 struct elf32_mb_link_hash_table *htab;
2962 bfd *dynobj;
2963 asection *s;
2964 bfd *ibfd;
2965
2966 htab = elf32_mb_hash_table (info);
2967 if (htab == NULL)
2968 return FALSE;
2969
2970 dynobj = htab->elf.dynobj;
2971 BFD_ASSERT (dynobj != NULL);
2972
2973 /* Set up .got offsets for local syms, and space for local dynamic
2974 relocs. */
2975 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2976 {
2977 bfd_signed_vma *local_got;
2978 bfd_signed_vma *end_local_got;
2979 bfd_size_type locsymcount;
2980 Elf_Internal_Shdr *symtab_hdr;
2981 unsigned char *lgot_masks;
2982 asection *srel;
2983
2984 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2985 continue;
2986
2987 for (s = ibfd->sections; s != NULL; s = s->next)
2988 {
2989 struct elf32_mb_dyn_relocs *p;
2990
2991 for (p = ((struct elf32_mb_dyn_relocs *)
2992 elf_section_data (s)->local_dynrel);
2993 p != NULL;
2994 p = p->next)
2995 {
2996 if (!bfd_is_abs_section (p->sec)
2997 && bfd_is_abs_section (p->sec->output_section))
2998 {
2999 /* Input section has been discarded, either because
3000 it is a copy of a linkonce section or due to
3001 linker script /DISCARD/, so we'll be discarding
3002 the relocs too. */
3003 }
3004 else if (p->count != 0)
3005 {
3006 srel = elf_section_data (p->sec)->sreloc;
3007 srel->size += p->count * sizeof (Elf32_External_Rela);
3008 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
3009 info->flags |= DF_TEXTREL;
3010 }
3011 }
3012 }
3013
3014 local_got = elf_local_got_refcounts (ibfd);
3015 if (!local_got)
3016 continue;
3017
3018 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3019 locsymcount = symtab_hdr->sh_info;
3020 end_local_got = local_got + locsymcount;
3021 lgot_masks = (unsigned char *) end_local_got;
3022 s = htab->sgot;
3023 srel = htab->srelgot;
3024
3025 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3026 {
3027 if (*local_got > 0)
3028 {
3029 unsigned int need = 0;
3030 if ((*lgot_masks & TLS_TLS) != 0)
3031 {
3032 if ((*lgot_masks & TLS_GD) != 0)
3033 need += 8;
3034 if ((*lgot_masks & TLS_LD) != 0)
3035 htab->tlsld_got.refcount += 1;
3036 }
3037 else
3038 need += 4;
3039
3040 if (need == 0)
3041 {
3042 *local_got = (bfd_vma) -1;
3043 }
3044 else
3045 {
3046 *local_got = s->size;
3047 s->size += need;
3048 if (info->shared)
3049 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
3050 }
3051 }
3052 else
3053 *local_got = (bfd_vma) -1;
3054 }
3055 }
3056
3057 /* Allocate global sym .plt and .got entries, and space for global
3058 sym dynamic relocs. */
3059 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3060
3061 if (htab->tlsld_got.refcount > 0)
3062 {
3063 htab->tlsld_got.offset = htab->sgot->size;
3064 htab->sgot->size += 8;
3065 if (info->shared)
3066 htab->srelgot->size += sizeof (Elf32_External_Rela);
3067 }
3068 else
3069 htab->tlsld_got.offset = (bfd_vma) -1;
3070
3071 if (elf_hash_table (info)->dynamic_sections_created)
3072 {
3073 /* Make space for the trailing nop in .plt. */
3074 if (htab->splt->size > 0)
3075 htab->splt->size += 4;
3076 }
3077
3078 /* The check_relocs and adjust_dynamic_symbol entry points have
3079 determined the sizes of the various dynamic sections. Allocate
3080 memory for them. */
3081 for (s = dynobj->sections; s != NULL; s = s->next)
3082 {
3083 const char *name;
3084 bfd_boolean strip = FALSE;
3085
3086 if ((s->flags & SEC_LINKER_CREATED) == 0)
3087 continue;
3088
3089 /* It's OK to base decisions on the section name, because none
3090 of the dynobj section names depend upon the input files. */
3091 name = bfd_get_section_name (dynobj, s);
3092
3093 if (strncmp (name, ".rela", 5) == 0)
3094 {
3095 if (s->size == 0)
3096 {
3097 /* If we don't need this section, strip it from the
3098 output file. This is to handle .rela.bss and
3099 .rela.plt. We must create it in
3100 create_dynamic_sections, because it must be created
3101 before the linker maps input sections to output
3102 sections. The linker does that before
3103 adjust_dynamic_symbol is called, and it is that
3104 function which decides whether anything needs to go
3105 into these sections. */
3106 strip = TRUE;
3107 }
3108 else
3109 {
3110 /* We use the reloc_count field as a counter if we need
3111 to copy relocs into the output file. */
3112 s->reloc_count = 0;
3113 }
3114 }
3115 else if (s != htab->splt && s != htab->sgot && s != htab->sgotplt)
3116 {
3117 /* It's not one of our sections, so don't allocate space. */
3118 continue;
3119 }
3120
3121 if (strip)
3122 {
3123 s->flags |= SEC_EXCLUDE;
3124 continue;
3125 }
3126
3127 /* Allocate memory for the section contents. */
3128 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3129 Unused entries should be reclaimed before the section's contents
3130 are written out, but at the moment this does not happen. Thus in
3131 order to prevent writing out garbage, we initialise the section's
3132 contents to zero. */
3133 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3134 if (s->contents == NULL && s->size != 0)
3135 return FALSE;
3136 }
3137
3138 if (elf_hash_table (info)->dynamic_sections_created)
3139 {
3140 /* Add some entries to the .dynamic section. We fill in the
3141 values later, in microblaze_elf_finish_dynamic_sections, but we
3142 must add the entries now so that we get the correct size for
3143 the .dynamic section. The DT_DEBUG entry is filled in by the
3144 dynamic linker and used by the debugger. */
3145 #define add_dynamic_entry(TAG, VAL) \
3146 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3147
3148 if (info->executable)
3149 {
3150 if (!add_dynamic_entry (DT_DEBUG, 0))
3151 return FALSE;
3152 }
3153
3154 if (!add_dynamic_entry (DT_RELA, 0)
3155 || !add_dynamic_entry (DT_RELASZ, 0)
3156 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3157 return FALSE;
3158
3159 if (htab->splt->size != 0)
3160 {
3161 if (!add_dynamic_entry (DT_PLTGOT, 0)
3162 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3163 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3164 || !add_dynamic_entry (DT_JMPREL, 0)
3165 || !add_dynamic_entry (DT_BIND_NOW, 1))
3166 return FALSE;
3167 }
3168
3169 if (info->flags & DF_TEXTREL)
3170 {
3171 if (!add_dynamic_entry (DT_TEXTREL, 0))
3172 return FALSE;
3173 }
3174 }
3175 #undef add_dynamic_entry
3176 return TRUE;
3177 }
3178
3179 /* Finish up dynamic symbol handling. We set the contents of various
3180 dynamic sections here. */
3181
3182 static bfd_boolean
3183 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
3184 struct bfd_link_info *info,
3185 struct elf_link_hash_entry *h,
3186 Elf_Internal_Sym *sym)
3187 {
3188 struct elf32_mb_link_hash_table *htab;
3189 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h);
3190
3191 htab = elf32_mb_hash_table (info);
3192 if (htab == NULL)
3193 return FALSE;
3194
3195 if (h->plt.offset != (bfd_vma) -1)
3196 {
3197 asection *splt;
3198 asection *srela;
3199 asection *sgotplt;
3200 Elf_Internal_Rela rela;
3201 bfd_byte *loc;
3202 bfd_vma plt_index;
3203 bfd_vma got_offset;
3204 bfd_vma got_addr;
3205
3206 /* This symbol has an entry in the procedure linkage table. Set
3207 it up. */
3208 BFD_ASSERT (h->dynindx != -1);
3209
3210 splt = htab->splt;
3211 srela = htab->srelplt;
3212 sgotplt = htab->sgotplt;
3213 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
3214
3215 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
3216 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
3217 got_addr = got_offset;
3218
3219 /* For non-PIC objects we need absolute address of the GOT entry. */
3220 if (!info->shared)
3221 got_addr += htab->sgotplt->output_section->vma + sgotplt->output_offset;
3222
3223 /* Fill in the entry in the procedure linkage table. */
3224 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
3225 splt->contents + h->plt.offset);
3226 if (info->shared)
3227 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
3228 splt->contents + h->plt.offset + 4);
3229 else
3230 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
3231 splt->contents + h->plt.offset + 4);
3232 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
3233 splt->contents + h->plt.offset + 8);
3234 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
3235 splt->contents + h->plt.offset + 12);
3236
3237 /* Any additions to the .got section??? */
3238 /* bfd_put_32 (output_bfd,
3239 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3240 sgotplt->contents + got_offset); */
3241
3242 /* Fill in the entry in the .rela.plt section. */
3243 rela.r_offset = (sgotplt->output_section->vma
3244 + sgotplt->output_offset
3245 + got_offset);
3246 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
3247 rela.r_addend = 0;
3248 loc = srela->contents;
3249 loc += plt_index * sizeof (Elf32_External_Rela);
3250 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3251
3252 if (!h->def_regular)
3253 {
3254 /* Mark the symbol as undefined, rather than as defined in
3255 the .plt section. Zero the value. */
3256 sym->st_shndx = SHN_UNDEF;
3257 sym->st_value = 0;
3258 }
3259 }
3260
3261 /* h->got.refcount to be checked ? */
3262 if (h->got.offset != (bfd_vma) -1 &&
3263 ! ((h->got.offset & 1) ||
3264 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask)))
3265 {
3266 asection *sgot;
3267 asection *srela;
3268 bfd_vma offset;
3269
3270 /* This symbol has an entry in the global offset table. Set it
3271 up. */
3272
3273 sgot = htab->sgot;
3274 srela = htab->srelgot;
3275 BFD_ASSERT (sgot != NULL && srela != NULL);
3276
3277 offset = (sgot->output_section->vma + sgot->output_offset
3278 + (h->got.offset &~ (bfd_vma) 1));
3279
3280 /* If this is a -Bsymbolic link, and the symbol is defined
3281 locally, we just want to emit a RELATIVE reloc. Likewise if
3282 the symbol was forced to be local because of a version file.
3283 The entry in the global offset table will already have been
3284 initialized in the relocate_section function. */
3285 if (info->shared
3286 && (info->symbolic || h->dynindx == -1)
3287 && h->def_regular)
3288 {
3289 asection *sec = h->root.u.def.section;
3290 microblaze_elf_output_dynamic_relocation (output_bfd,
3291 srela, srela->reloc_count++,
3292 /* symindex= */ 0,
3293 R_MICROBLAZE_REL, offset,
3294 h->root.u.def.value
3295 + sec->output_section->vma
3296 + sec->output_offset);
3297 }
3298 else
3299 {
3300 microblaze_elf_output_dynamic_relocation (output_bfd,
3301 srela, srela->reloc_count++,
3302 h->dynindx,
3303 R_MICROBLAZE_GLOB_DAT,
3304 offset, 0);
3305 }
3306
3307 bfd_put_32 (output_bfd, (bfd_vma) 0,
3308 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
3309 }
3310
3311 if (h->needs_copy)
3312 {
3313 asection *s;
3314 Elf_Internal_Rela rela;
3315 bfd_byte *loc;
3316
3317 /* This symbols needs a copy reloc. Set it up. */
3318
3319 BFD_ASSERT (h->dynindx != -1);
3320
3321 s = bfd_get_linker_section (htab->elf.dynobj, ".rela.bss");
3322 BFD_ASSERT (s != NULL);
3323
3324 rela.r_offset = (h->root.u.def.value
3325 + h->root.u.def.section->output_section->vma
3326 + h->root.u.def.section->output_offset);
3327 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
3328 rela.r_addend = 0;
3329 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3330 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3331 }
3332
3333 /* Mark some specially defined symbols as absolute. */
3334 if (h == htab->elf.hdynamic
3335 || h == htab->elf.hgot
3336 || h == htab->elf.hplt)
3337 sym->st_shndx = SHN_ABS;
3338
3339 return TRUE;
3340 }
3341
3342
3343 /* Finish up the dynamic sections. */
3344
3345 static bfd_boolean
3346 microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
3347 struct bfd_link_info *info)
3348 {
3349 bfd *dynobj;
3350 asection *sdyn, *sgot;
3351 struct elf32_mb_link_hash_table *htab;
3352
3353 htab = elf32_mb_hash_table (info);
3354 if (htab == NULL)
3355 return FALSE;
3356
3357 dynobj = htab->elf.dynobj;
3358
3359 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3360
3361 if (htab->elf.dynamic_sections_created)
3362 {
3363 asection *splt;
3364 Elf32_External_Dyn *dyncon, *dynconend;
3365
3366 splt = bfd_get_linker_section (dynobj, ".plt");
3367 BFD_ASSERT (splt != NULL && sdyn != NULL);
3368
3369 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3370 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3371 for (; dyncon < dynconend; dyncon++)
3372 {
3373 Elf_Internal_Dyn dyn;
3374 const char *name;
3375 bfd_boolean size;
3376
3377 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3378
3379 switch (dyn.d_tag)
3380 {
3381 case DT_PLTGOT: name = ".got.plt"; size = FALSE; break;
3382 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
3383 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
3384 case DT_RELA: name = ".rela.dyn"; size = FALSE; break;
3385 case DT_RELASZ: name = ".rela.dyn"; size = TRUE; break;
3386 default: name = NULL; size = FALSE; break;
3387 }
3388
3389 if (name != NULL)
3390 {
3391 asection *s;
3392
3393 s = bfd_get_section_by_name (output_bfd, name);
3394 if (s == NULL)
3395 dyn.d_un.d_val = 0;
3396 else
3397 {
3398 if (! size)
3399 dyn.d_un.d_ptr = s->vma;
3400 else
3401 dyn.d_un.d_val = s->size;
3402 }
3403 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3404 }
3405 }
3406
3407 /* Clear the first entry in the procedure linkage table,
3408 and put a nop in the last four bytes. */
3409 if (splt->size > 0)
3410 {
3411 memset (splt->contents, 0, PLT_ENTRY_SIZE);
3412 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
3413 splt->contents + splt->size - 4);
3414 }
3415
3416 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3417 }
3418
3419 /* Set the first entry in the global offset table to the address of
3420 the dynamic section. */
3421 sgot = bfd_get_linker_section (dynobj, ".got.plt");
3422 if (sgot && sgot->size > 0)
3423 {
3424 if (sdyn == NULL)
3425 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3426 else
3427 bfd_put_32 (output_bfd,
3428 sdyn->output_section->vma + sdyn->output_offset,
3429 sgot->contents);
3430 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3431 }
3432
3433 if (htab->sgot && htab->sgot->size > 0)
3434 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3435
3436 return TRUE;
3437 }
3438
3439 /* Hook called by the linker routine which adds symbols from an object
3440 file. We use it to put .comm items in .sbss, and not .bss. */
3441
3442 static bfd_boolean
3443 microblaze_elf_add_symbol_hook (bfd *abfd,
3444 struct bfd_link_info *info,
3445 Elf_Internal_Sym *sym,
3446 const char **namep ATTRIBUTE_UNUSED,
3447 flagword *flagsp ATTRIBUTE_UNUSED,
3448 asection **secp,
3449 bfd_vma *valp)
3450 {
3451 if (sym->st_shndx == SHN_COMMON
3452 && !info->relocatable
3453 && sym->st_size <= elf_gp_size (abfd))
3454 {
3455 /* Common symbols less than or equal to -G nn bytes are automatically
3456 put into .sbss. */
3457 *secp = bfd_make_section_old_way (abfd, ".sbss");
3458 if (*secp == NULL
3459 || ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON))
3460 return FALSE;
3461
3462 *valp = sym->st_size;
3463 }
3464
3465 return TRUE;
3466 }
3467
3468 #define TARGET_LITTLE_SYM bfd_elf32_microblazeel_vec
3469 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3470
3471 #define TARGET_BIG_SYM bfd_elf32_microblaze_vec
3472 #define TARGET_BIG_NAME "elf32-microblaze"
3473
3474 #define ELF_ARCH bfd_arch_microblaze
3475 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3476 #define ELF_MACHINE_CODE EM_MICROBLAZE
3477 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3478 #define ELF_MAXPAGESIZE 0x1000
3479 #define elf_info_to_howto microblaze_elf_info_to_howto
3480 #define elf_info_to_howto_rel NULL
3481
3482 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3483 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3484 #define elf_backend_relocate_section microblaze_elf_relocate_section
3485 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3486 #define bfd_elf32_bfd_merge_private_bfd_data microblaze_elf_merge_private_bfd_data
3487 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3488
3489 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3490 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3491 #define elf_backend_check_relocs microblaze_elf_check_relocs
3492 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3493 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3494 #define elf_backend_can_gc_sections 1
3495 #define elf_backend_can_refcount 1
3496 #define elf_backend_want_got_plt 1
3497 #define elf_backend_plt_readonly 1
3498 #define elf_backend_got_header_size 12
3499 #define elf_backend_rela_normal 1
3500
3501 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3502 #define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
3503 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3504 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3505 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3506 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3507
3508 #include "elf32-target.h"
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