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[deliverable/binutils-gdb.git] / bfd / elf32-i860.c
1 /* Intel i860 specific support for 32-bit ELF.
2 Copyright (C) 1993-2016 Free Software Foundation, Inc.
3
4 Full i860 support contributed by Jason Eckhardt <jle@cygnus.com>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/i860.h"
28
29 /* special_function for R_860_PC26 relocation. */
30 static bfd_reloc_status_type
31 i860_howto_pc26_reloc (bfd *abfd ATTRIBUTE_UNUSED,
32 arelent *reloc_entry,
33 asymbol *symbol,
34 void *data ATTRIBUTE_UNUSED,
35 asection *input_section,
36 bfd *output_bfd,
37 char **error_message ATTRIBUTE_UNUSED)
38 {
39 bfd_vma insn;
40 bfd_vma relocation;
41 bfd_byte *addr;
42
43 if (output_bfd != NULL
44 && (symbol->flags & BSF_SECTION_SYM) == 0
45 && (! reloc_entry->howto->partial_inplace
46 || reloc_entry->addend == 0))
47 {
48 reloc_entry->address += input_section->output_offset;
49 return bfd_reloc_ok;
50 }
51
52 /* Used elf32-mips.c as an example. */
53 if (bfd_is_und_section (symbol->section)
54 && output_bfd == (bfd *) NULL)
55 return bfd_reloc_undefined;
56
57 if (bfd_is_com_section (symbol->section))
58 relocation = 0;
59 else
60 relocation = symbol->value;
61
62 relocation += symbol->section->output_section->vma;
63 relocation += symbol->section->output_offset;
64 relocation += reloc_entry->addend;
65
66 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
67 return bfd_reloc_outofrange;
68
69 /* Adjust for PC-relative relocation. */
70 relocation -= (input_section->output_section->vma
71 + input_section->output_offset
72 + reloc_entry->address
73 + 4);
74
75 /* Check for target out of range. */
76 if ((bfd_signed_vma)relocation > (0x3ffffff << 2)
77 || (bfd_signed_vma)relocation < (-0x4000000 * 4))
78 return bfd_reloc_outofrange;
79
80 addr = (bfd_byte *) data + reloc_entry->address;
81 insn = bfd_get_32 (abfd, addr);
82
83 relocation >>= reloc_entry->howto->rightshift;
84 insn = (insn & ~reloc_entry->howto->dst_mask)
85 | (relocation & reloc_entry->howto->dst_mask);
86
87 bfd_put_32 (abfd, (bfd_vma) insn, addr);
88
89 return bfd_reloc_ok;
90 }
91
92 /* special_function for R_860_PC16 relocation. */
93 static bfd_reloc_status_type
94 i860_howto_pc16_reloc (bfd *abfd,
95 arelent *reloc_entry,
96 asymbol *symbol,
97 void *data,
98 asection *input_section,
99 bfd *output_bfd,
100 char **error_message ATTRIBUTE_UNUSED)
101 {
102 bfd_vma insn;
103 bfd_vma relocation;
104 bfd_byte *addr;
105
106 if (output_bfd != NULL
107 && (symbol->flags & BSF_SECTION_SYM) == 0
108 && (! reloc_entry->howto->partial_inplace
109 || reloc_entry->addend == 0))
110 {
111 reloc_entry->address += input_section->output_offset;
112 return bfd_reloc_ok;
113 }
114
115 /* Used elf32-mips.c as an example. */
116 if (bfd_is_und_section (symbol->section)
117 && output_bfd == (bfd *) NULL)
118 return bfd_reloc_undefined;
119
120 if (bfd_is_com_section (symbol->section))
121 relocation = 0;
122 else
123 relocation = symbol->value;
124
125 relocation += symbol->section->output_section->vma;
126 relocation += symbol->section->output_offset;
127 relocation += reloc_entry->addend;
128
129 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
130 return bfd_reloc_outofrange;
131
132 /* Adjust for PC-relative relocation. */
133 relocation -= (input_section->output_section->vma
134 + input_section->output_offset
135 + reloc_entry->address
136 + 4);
137
138 /* Check for target out of range. */
139 if ((bfd_signed_vma)relocation > (0x7fff << 2)
140 || (bfd_signed_vma)relocation < (-0x8000 * 4))
141 return bfd_reloc_outofrange;
142
143 addr = (bfd_byte *) data + reloc_entry->address;
144 insn = bfd_get_32 (abfd, addr);
145
146 relocation >>= reloc_entry->howto->rightshift;
147 relocation = (((relocation & 0xf800) << 5) | (relocation & 0x7ff))
148 & reloc_entry->howto->dst_mask;
149 insn = (insn & ~reloc_entry->howto->dst_mask) | relocation;
150
151 bfd_put_32 (abfd, (bfd_vma) insn, addr);
152
153 return bfd_reloc_ok;
154 }
155
156 /* special_function for R_860_HIGHADJ relocation. */
157 static bfd_reloc_status_type
158 i860_howto_highadj_reloc (bfd *abfd,
159 arelent *reloc_entry,
160 asymbol *symbol,
161 void *data,
162 asection *input_section,
163 bfd *output_bfd,
164 char **error_message ATTRIBUTE_UNUSED)
165 {
166 bfd_vma insn;
167 bfd_vma relocation;
168 bfd_byte *addr;
169
170 if (output_bfd != NULL
171 && (symbol->flags & BSF_SECTION_SYM) == 0
172 && (! reloc_entry->howto->partial_inplace
173 || reloc_entry->addend == 0))
174 {
175 reloc_entry->address += input_section->output_offset;
176 return bfd_reloc_ok;
177 }
178
179 /* Used elf32-mips.c as an example. */
180 if (bfd_is_und_section (symbol->section)
181 && output_bfd == (bfd *) NULL)
182 return bfd_reloc_undefined;
183
184 if (bfd_is_com_section (symbol->section))
185 relocation = 0;
186 else
187 relocation = symbol->value;
188
189 relocation += symbol->section->output_section->vma;
190 relocation += symbol->section->output_offset;
191 relocation += reloc_entry->addend;
192 relocation += 0x8000;
193
194 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
195 return bfd_reloc_outofrange;
196
197 addr = (bfd_byte *) data + reloc_entry->address;
198 insn = bfd_get_32 (abfd, addr);
199
200 relocation = ((relocation >> 16) & 0xffff);
201
202 insn = (insn & 0xffff0000) | relocation;
203
204 bfd_put_32 (abfd, (bfd_vma) insn, addr);
205
206 return bfd_reloc_ok;
207 }
208
209 /* special_function for R_860_SPLITn relocations. */
210 static bfd_reloc_status_type
211 i860_howto_splitn_reloc (bfd *abfd,
212 arelent *reloc_entry,
213 asymbol *symbol,
214 void *data,
215 asection *input_section,
216 bfd *output_bfd,
217 char **error_message ATTRIBUTE_UNUSED)
218 {
219 bfd_vma insn;
220 bfd_vma relocation;
221 bfd_byte *addr;
222
223 if (output_bfd != NULL
224 && (symbol->flags & BSF_SECTION_SYM) == 0
225 && (! reloc_entry->howto->partial_inplace
226 || reloc_entry->addend == 0))
227 {
228 reloc_entry->address += input_section->output_offset;
229 return bfd_reloc_ok;
230 }
231
232 /* Used elf32-mips.c as an example. */
233 if (bfd_is_und_section (symbol->section)
234 && output_bfd == (bfd *) NULL)
235 return bfd_reloc_undefined;
236
237 if (bfd_is_com_section (symbol->section))
238 relocation = 0;
239 else
240 relocation = symbol->value;
241
242 relocation += symbol->section->output_section->vma;
243 relocation += symbol->section->output_offset;
244 relocation += reloc_entry->addend;
245
246 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
247 return bfd_reloc_outofrange;
248
249 addr = (bfd_byte *) data + reloc_entry->address;
250 insn = bfd_get_32 (abfd, addr);
251
252 relocation = (((relocation & 0xf800) << 5) | (relocation & 0x7ff))
253 & reloc_entry->howto->dst_mask;
254 insn = (insn & ~reloc_entry->howto->dst_mask) | relocation;
255
256 bfd_put_32 (abfd, (bfd_vma) insn, addr);
257
258 return bfd_reloc_ok;
259 }
260
261 /* This howto table is preliminary. */
262 static reloc_howto_type elf32_i860_howto_table [] =
263 {
264 /* This relocation does nothing. */
265 HOWTO (R_860_NONE, /* type */
266 0, /* rightshift */
267 3, /* size (0 = byte, 1 = short, 2 = long) */
268 0, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_dont, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_860_NONE", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 32-bit absolute relocation. */
280 HOWTO (R_860_32, /* type */
281 0, /* rightshift */
282 2, /* size (0 = byte, 1 = short, 2 = long) */
283 32, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_bitfield, /* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_860_32", /* name */
289 FALSE, /* partial_inplace */
290 0xffffffff, /* src_mask */
291 0xffffffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 HOWTO (R_860_COPY, /* type */
295 0, /* rightshift */
296 2, /* size (0 = byte, 1 = short, 2 = long) */
297 32, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_bitfield, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_860_COPY", /* name */
303 TRUE, /* partial_inplace */
304 0xffffffff, /* src_mask */
305 0xffffffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 HOWTO (R_860_GLOB_DAT, /* type */
309 0, /* rightshift */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
311 32, /* bitsize */
312 FALSE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_bitfield, /* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_860_GLOB_DAT", /* name */
317 TRUE, /* partial_inplace */
318 0xffffffff, /* src_mask */
319 0xffffffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
321
322 HOWTO (R_860_JUMP_SLOT, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 32, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_860_JUMP_SLOT", /* name */
331 TRUE, /* partial_inplace */
332 0xffffffff, /* src_mask */
333 0xffffffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 HOWTO (R_860_RELATIVE, /* type */
337 0, /* rightshift */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
339 32, /* bitsize */
340 FALSE, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_bitfield, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_860_RELATIVE", /* name */
345 TRUE, /* partial_inplace */
346 0xffffffff, /* src_mask */
347 0xffffffff, /* dst_mask */
348 FALSE), /* pcrel_offset */
349
350 /* A 26-bit PC-relative relocation. */
351 HOWTO (R_860_PC26, /* type */
352 2, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 26, /* bitsize */
355 TRUE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_bitfield, /* complain_on_overflow */
358 i860_howto_pc26_reloc, /* special_function */
359 "R_860_PC26", /* name */
360 FALSE, /* partial_inplace */
361 0x3ffffff, /* src_mask */
362 0x3ffffff, /* dst_mask */
363 TRUE), /* pcrel_offset */
364
365 HOWTO (R_860_PLT26, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 26, /* bitsize */
369 TRUE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_bitfield, /* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_860_PLT26", /* name */
374 TRUE, /* partial_inplace */
375 0xffffffff, /* src_mask */
376 0xffffffff, /* dst_mask */
377 TRUE), /* pcrel_offset */
378
379 /* A 16-bit PC-relative relocation. */
380 HOWTO (R_860_PC16, /* type */
381 2, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 TRUE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_bitfield, /* complain_on_overflow */
387 i860_howto_pc16_reloc, /* special_function */
388 "R_860_PC16", /* name */
389 FALSE, /* partial_inplace */
390 0x1f07ff, /* src_mask */
391 0x1f07ff, /* dst_mask */
392 TRUE), /* pcrel_offset */
393
394 HOWTO (R_860_LOW0, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_dont, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_860_LOW0", /* name */
403 FALSE, /* partial_inplace */
404 0xffff, /* src_mask */
405 0xffff, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 HOWTO (R_860_SPLIT0, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_dont, /* complain_on_overflow */
415 i860_howto_splitn_reloc, /* special_function */
416 "R_860_SPLIT0", /* name */
417 FALSE, /* partial_inplace */
418 0x1f07ff, /* src_mask */
419 0x1f07ff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 HOWTO (R_860_LOW1, /* type */
423 0, /* rightshift */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
425 16, /* bitsize */
426 FALSE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_dont, /* complain_on_overflow */
429 bfd_elf_generic_reloc, /* special_function */
430 "R_860_LOW1", /* name */
431 FALSE, /* partial_inplace */
432 0xfffe, /* src_mask */
433 0xfffe, /* dst_mask */
434 FALSE), /* pcrel_offset */
435
436 HOWTO (R_860_SPLIT1, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 16, /* bitsize */
440 FALSE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_dont, /* complain_on_overflow */
443 i860_howto_splitn_reloc, /* special_function */
444 "R_860_SPLIT1", /* name */
445 FALSE, /* partial_inplace */
446 0x1f07fe, /* src_mask */
447 0x1f07fe, /* dst_mask */
448 FALSE), /* pcrel_offset */
449
450 HOWTO (R_860_LOW2, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_dont, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* special_function */
458 "R_860_LOW2", /* name */
459 FALSE, /* partial_inplace */
460 0xfffc, /* src_mask */
461 0xfffc, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 HOWTO (R_860_SPLIT2, /* type */
465 0, /* rightshift */
466 2, /* size (0 = byte, 1 = short, 2 = long) */
467 16, /* bitsize */
468 FALSE, /* pc_relative */
469 0, /* bitpos */
470 complain_overflow_dont, /* complain_on_overflow */
471 i860_howto_splitn_reloc, /* special_function */
472 "R_860_SPLIT2", /* name */
473 FALSE, /* partial_inplace */
474 0x1f07fc, /* src_mask */
475 0x1f07fc, /* dst_mask */
476 FALSE), /* pcrel_offset */
477
478 HOWTO (R_860_LOW3, /* type */
479 0, /* rightshift */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
481 16, /* bitsize */
482 FALSE, /* pc_relative */
483 0, /* bitpos */
484 complain_overflow_dont, /* complain_on_overflow */
485 bfd_elf_generic_reloc, /* special_function */
486 "R_860_LOW3", /* name */
487 FALSE, /* partial_inplace */
488 0xfff8, /* src_mask */
489 0xfff8, /* dst_mask */
490 FALSE), /* pcrel_offset */
491
492 HOWTO (R_860_LOGOT0, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 16, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_860_LOGOT0", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffff, /* dst_mask */
504 TRUE), /* pcrel_offset */
505
506 HOWTO (R_860_SPGOT0, /* type */
507 0, /* rightshift */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
509 16, /* bitsize */
510 FALSE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_dont, /* complain_on_overflow */
513 bfd_elf_generic_reloc, /* special_function */
514 "R_860_SPGOT0", /* name */
515 FALSE, /* partial_inplace */
516 0, /* src_mask */
517 0xffff, /* dst_mask */
518 TRUE), /* pcrel_offset */
519
520 HOWTO (R_860_LOGOT1, /* type */
521 0, /* rightshift */
522 2, /* size (0 = byte, 1 = short, 2 = long) */
523 16, /* bitsize */
524 FALSE, /* pc_relative */
525 0, /* bitpos */
526 complain_overflow_dont, /* complain_on_overflow */
527 bfd_elf_generic_reloc, /* special_function */
528 "R_860_LOGOT1", /* name */
529 FALSE, /* partial_inplace */
530 0, /* src_mask */
531 0xffff, /* dst_mask */
532 TRUE), /* pcrel_offset */
533
534 HOWTO (R_860_SPGOT1, /* type */
535 0, /* rightshift */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
537 16, /* bitsize */
538 FALSE, /* pc_relative */
539 0, /* bitpos */
540 complain_overflow_dont, /* complain_on_overflow */
541 bfd_elf_generic_reloc, /* special_function */
542 "R_860_SPGOT1", /* name */
543 FALSE, /* partial_inplace */
544 0, /* src_mask */
545 0xffff, /* dst_mask */
546 TRUE), /* pcrel_offset */
547
548 HOWTO (R_860_LOGOTOFF0, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_dont, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_860_LOGOTOFF0", /* name */
557 TRUE, /* partial_inplace */
558 0xffffffff, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 HOWTO (R_860_SPGOTOFF0, /* type */
563 0, /* rightshift */
564 2, /* size (0 = byte, 1 = short, 2 = long) */
565 32, /* bitsize */
566 FALSE, /* pc_relative */
567 0, /* bitpos */
568 complain_overflow_dont, /* complain_on_overflow */
569 bfd_elf_generic_reloc, /* special_function */
570 "R_860_SPGOTOFF0", /* name */
571 TRUE, /* partial_inplace */
572 0xffffffff, /* src_mask */
573 0xffffffff, /* dst_mask */
574 FALSE), /* pcrel_offset */
575
576 HOWTO (R_860_LOGOTOFF1, /* type */
577 0, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 32, /* bitsize */
580 FALSE, /* pc_relative */
581 0, /* bitpos */
582 complain_overflow_dont, /* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 "R_860_LOGOTOFF1", /* name */
585 TRUE, /* partial_inplace */
586 0xffffffff, /* src_mask */
587 0xffffffff, /* dst_mask */
588 FALSE), /* pcrel_offset */
589
590 HOWTO (R_860_SPGOTOFF1, /* type */
591 0, /* rightshift */
592 2, /* size (0 = byte, 1 = short, 2 = long) */
593 32, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_860_SPGOTOFF1", /* name */
599 TRUE, /* partial_inplace */
600 0xffffffff, /* src_mask */
601 0xffffffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 HOWTO (R_860_LOGOTOFF2, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_dont, /* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_860_LOGOTOFF2", /* name */
613 TRUE, /* partial_inplace */
614 0xffffffff, /* src_mask */
615 0xffffffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 HOWTO (R_860_LOGOTOFF3, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_860_LOGOTOFF3", /* name */
627 TRUE, /* partial_inplace */
628 0xffffffff, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 HOWTO (R_860_LOPC, /* type */
633 0, /* rightshift */
634 2, /* size (0 = byte, 1 = short, 2 = long) */
635 16, /* bitsize */
636 TRUE, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_bitfield, /* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_860_LOPC", /* name */
641 FALSE, /* partial_inplace */
642 0xffff, /* src_mask */
643 0xffff, /* dst_mask */
644 TRUE), /* pcrel_offset */
645
646 HOWTO (R_860_HIGHADJ, /* type */
647 0, /* rightshift */
648 2, /* size (0 = byte, 1 = short, 2 = long) */
649 16, /* bitsize */
650 FALSE, /* pc_relative */
651 0, /* bitpos */
652 complain_overflow_dont, /* complain_on_overflow */
653 i860_howto_highadj_reloc, /* special_function */
654 "R_860_HIGHADJ", /* name */
655 FALSE, /* partial_inplace */
656 0xffff, /* src_mask */
657 0xffff, /* dst_mask */
658 FALSE), /* pcrel_offset */
659
660 HOWTO (R_860_HAGOT, /* type */
661 0, /* rightshift */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
663 16, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_dont, /* complain_on_overflow */
667 bfd_elf_generic_reloc, /* special_function */
668 "R_860_HAGOT", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffff, /* dst_mask */
672 TRUE), /* pcrel_offset */
673
674 HOWTO (R_860_HAGOTOFF, /* type */
675 0, /* rightshift */
676 2, /* size (0 = byte, 1 = short, 2 = long) */
677 32, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_dont, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_860_HAGOTOFF", /* name */
683 TRUE, /* partial_inplace */
684 0xffffffff, /* src_mask */
685 0xffffffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 HOWTO (R_860_HAPC, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_bitfield, /* complain_on_overflow */
695 bfd_elf_generic_reloc, /* special_function */
696 "R_860_HAPC", /* name */
697 FALSE, /* partial_inplace */
698 0xffff, /* src_mask */
699 0xffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 HOWTO (R_860_HIGH, /* type */
703 16, /* rightshift */
704 2, /* size (0 = byte, 1 = short, 2 = long) */
705 16, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_dont, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_860_HIGH", /* name */
711 FALSE, /* partial_inplace */
712 0xffff, /* src_mask */
713 0xffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 HOWTO (R_860_HIGOT, /* type */
717 0, /* rightshift */
718 2, /* size (0 = byte, 1 = short, 2 = long) */
719 16, /* bitsize */
720 FALSE, /* pc_relative */
721 0, /* bitpos */
722 complain_overflow_dont, /* complain_on_overflow */
723 bfd_elf_generic_reloc, /* special_function */
724 "R_860_HIGOT", /* name */
725 FALSE, /* partial_inplace */
726 0, /* src_mask */
727 0xffff, /* dst_mask */
728 TRUE), /* pcrel_offset */
729
730 HOWTO (R_860_HIGOTOFF, /* type */
731 0, /* rightshift */
732 2, /* size (0 = byte, 1 = short, 2 = long) */
733 32, /* bitsize */
734 FALSE, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_dont, /* complain_on_overflow */
737 bfd_elf_generic_reloc, /* special_function */
738 "R_860_HIGOTOFF", /* name */
739 TRUE, /* partial_inplace */
740 0xffffffff, /* src_mask */
741 0xffffffff, /* dst_mask */
742 FALSE), /* pcrel_offset */
743 };
744 \f
745 static unsigned char elf_code_to_howto_index[R_860_max + 1];
746
747 static reloc_howto_type *
748 lookup_howto (unsigned int rtype)
749 {
750 static int initialized = 0;
751 int i;
752 int howto_tbl_size = (int) (sizeof (elf32_i860_howto_table)
753 / sizeof (elf32_i860_howto_table[0]));
754
755 if (! initialized)
756 {
757 initialized = 1;
758 memset (elf_code_to_howto_index, 0xff,
759 sizeof (elf_code_to_howto_index));
760 for (i = 0; i < howto_tbl_size; i++)
761 elf_code_to_howto_index[elf32_i860_howto_table[i].type] = i;
762 }
763
764 BFD_ASSERT (rtype <= R_860_max);
765 i = elf_code_to_howto_index[rtype];
766 if (i >= howto_tbl_size)
767 return 0;
768 return elf32_i860_howto_table + i;
769 }
770
771 /* Given a BFD reloc, return the matching HOWTO structure. */
772 static reloc_howto_type *
773 elf32_i860_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
774 bfd_reloc_code_real_type code)
775 {
776 unsigned int rtype;
777
778 switch (code)
779 {
780 case BFD_RELOC_NONE:
781 rtype = R_860_NONE;
782 break;
783 case BFD_RELOC_32:
784 rtype = R_860_32;
785 break;
786 case BFD_RELOC_860_COPY:
787 rtype = R_860_COPY;
788 break;
789 case BFD_RELOC_860_GLOB_DAT:
790 rtype = R_860_GLOB_DAT;
791 break;
792 case BFD_RELOC_860_JUMP_SLOT:
793 rtype = R_860_JUMP_SLOT;
794 break;
795 case BFD_RELOC_860_RELATIVE:
796 rtype = R_860_RELATIVE;
797 break;
798 case BFD_RELOC_860_PC26:
799 rtype = R_860_PC26;
800 break;
801 case BFD_RELOC_860_PLT26:
802 rtype = R_860_PLT26;
803 break;
804 case BFD_RELOC_860_PC16:
805 rtype = R_860_PC16;
806 break;
807 case BFD_RELOC_860_LOW0:
808 rtype = R_860_LOW0;
809 break;
810 case BFD_RELOC_860_SPLIT0:
811 rtype = R_860_SPLIT0;
812 break;
813 case BFD_RELOC_860_LOW1:
814 rtype = R_860_LOW1;
815 break;
816 case BFD_RELOC_860_SPLIT1:
817 rtype = R_860_SPLIT1;
818 break;
819 case BFD_RELOC_860_LOW2:
820 rtype = R_860_LOW2;
821 break;
822 case BFD_RELOC_860_SPLIT2:
823 rtype = R_860_SPLIT2;
824 break;
825 case BFD_RELOC_860_LOW3:
826 rtype = R_860_LOW3;
827 break;
828 case BFD_RELOC_860_LOGOT0:
829 rtype = R_860_LOGOT0;
830 break;
831 case BFD_RELOC_860_SPGOT0:
832 rtype = R_860_SPGOT0;
833 break;
834 case BFD_RELOC_860_LOGOT1:
835 rtype = R_860_LOGOT1;
836 break;
837 case BFD_RELOC_860_SPGOT1:
838 rtype = R_860_SPGOT1;
839 break;
840 case BFD_RELOC_860_LOGOTOFF0:
841 rtype = R_860_LOGOTOFF0;
842 break;
843 case BFD_RELOC_860_SPGOTOFF0:
844 rtype = R_860_SPGOTOFF0;
845 break;
846 case BFD_RELOC_860_LOGOTOFF1:
847 rtype = R_860_LOGOTOFF1;
848 break;
849 case BFD_RELOC_860_SPGOTOFF1:
850 rtype = R_860_SPGOTOFF1;
851 break;
852 case BFD_RELOC_860_LOGOTOFF2:
853 rtype = R_860_LOGOTOFF2;
854 break;
855 case BFD_RELOC_860_LOGOTOFF3:
856 rtype = R_860_LOGOTOFF3;
857 break;
858 case BFD_RELOC_860_LOPC:
859 rtype = R_860_LOPC;
860 break;
861 case BFD_RELOC_860_HIGHADJ:
862 rtype = R_860_HIGHADJ;
863 break;
864 case BFD_RELOC_860_HAGOT:
865 rtype = R_860_HAGOT;
866 break;
867 case BFD_RELOC_860_HAGOTOFF:
868 rtype = R_860_HAGOTOFF;
869 break;
870 case BFD_RELOC_860_HAPC:
871 rtype = R_860_HAPC;
872 break;
873 case BFD_RELOC_860_HIGH:
874 rtype = R_860_HIGH;
875 break;
876 case BFD_RELOC_860_HIGOT:
877 rtype = R_860_HIGOT;
878 break;
879 case BFD_RELOC_860_HIGOTOFF:
880 rtype = R_860_HIGOTOFF;
881 break;
882 default:
883 rtype = 0;
884 break;
885 }
886 return lookup_howto (rtype);
887 }
888
889 static reloc_howto_type *
890 elf32_i860_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
891 const char *r_name)
892 {
893 unsigned int i;
894
895 for (i = 0;
896 i < (sizeof (elf32_i860_howto_table)
897 / sizeof (elf32_i860_howto_table[0]));
898 i++)
899 if (elf32_i860_howto_table[i].name != NULL
900 && strcasecmp (elf32_i860_howto_table[i].name, r_name) == 0)
901 return &elf32_i860_howto_table[i];
902
903 return NULL;
904 }
905
906 /* Given a ELF reloc, return the matching HOWTO structure. */
907 static void
908 elf32_i860_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
909 arelent *bfd_reloc,
910 Elf_Internal_Rela *elf_reloc)
911 {
912 bfd_reloc->howto
913 = lookup_howto ((unsigned) ELF32_R_TYPE (elf_reloc->r_info));
914 }
915 \f
916 /* Specialized relocation handler for R_860_SPLITn. These relocations
917 involves a 16-bit field that is split into two contiguous parts. */
918 static bfd_reloc_status_type
919 elf32_i860_relocate_splitn (bfd *input_bfd,
920 Elf_Internal_Rela *rello,
921 bfd_byte *contents,
922 bfd_vma value)
923 {
924 bfd_vma insn;
925 reloc_howto_type *howto;
926 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rello->r_info));
927 insn = bfd_get_32 (input_bfd, contents + rello->r_offset);
928
929 /* Relocate. */
930 value += rello->r_addend;
931
932 /* Separate the fields and insert. */
933 value = (((value & 0xf800) << 5) | (value & 0x7ff)) & howto->dst_mask;
934 insn = (insn & ~howto->dst_mask) | value;
935
936 bfd_put_32 (input_bfd, insn, contents + rello->r_offset);
937 return bfd_reloc_ok;
938 }
939
940 /* Specialized relocation handler for R_860_PC16. This relocation
941 involves a 16-bit, PC-relative field that is split into two contiguous
942 parts. */
943 static bfd_reloc_status_type
944 elf32_i860_relocate_pc16 (bfd *input_bfd,
945 asection *input_section,
946 Elf_Internal_Rela *rello,
947 bfd_byte *contents,
948 bfd_vma value)
949 {
950 bfd_vma insn;
951 reloc_howto_type *howto;
952 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rello->r_info));
953 insn = bfd_get_32 (input_bfd, contents + rello->r_offset);
954
955 /* Adjust for PC-relative relocation. */
956 value -= (input_section->output_section->vma
957 + input_section->output_offset);
958 value -= rello->r_offset;
959
960 /* Relocate. */
961 value += rello->r_addend;
962
963 /* Adjust the value by 4, then separate the fields and insert. */
964 value = (value - 4) >> howto->rightshift;
965 value = (((value & 0xf800) << 5) | (value & 0x7ff)) & howto->dst_mask;
966 insn = (insn & ~howto->dst_mask) | value;
967
968 bfd_put_32 (input_bfd, insn, contents + rello->r_offset);
969 return bfd_reloc_ok;
970
971 }
972
973 /* Specialized relocation handler for R_860_PC26. This relocation
974 involves a 26-bit, PC-relative field which must be adjusted by 4. */
975 static bfd_reloc_status_type
976 elf32_i860_relocate_pc26 (bfd *input_bfd,
977 asection *input_section,
978 Elf_Internal_Rela *rello,
979 bfd_byte *contents,
980 bfd_vma value)
981 {
982 bfd_vma insn;
983 reloc_howto_type *howto;
984 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rello->r_info));
985 insn = bfd_get_32 (input_bfd, contents + rello->r_offset);
986
987 /* Adjust for PC-relative relocation. */
988 value -= (input_section->output_section->vma
989 + input_section->output_offset);
990 value -= rello->r_offset;
991
992 /* Relocate. */
993 value += rello->r_addend;
994
995 /* Adjust value by 4 and insert the field. */
996 value = ((value - 4) >> howto->rightshift) & howto->dst_mask;
997 insn = (insn & ~howto->dst_mask) | value;
998
999 bfd_put_32 (input_bfd, insn, contents + rello->r_offset);
1000 return bfd_reloc_ok;
1001
1002 }
1003
1004 /* Specialized relocation handler for R_860_HIGHADJ. */
1005 static bfd_reloc_status_type
1006 elf32_i860_relocate_highadj (bfd *input_bfd,
1007 Elf_Internal_Rela *rel,
1008 bfd_byte *contents,
1009 bfd_vma value)
1010 {
1011 bfd_vma insn;
1012
1013 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
1014
1015 value += rel->r_addend;
1016 value += 0x8000;
1017 value = ((value >> 16) & 0xffff);
1018
1019 insn = (insn & 0xffff0000) | value;
1020
1021 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
1022 return bfd_reloc_ok;
1023 }
1024
1025 /* Perform a single relocation. By default we use the standard BFD
1026 routines. However, we handle some specially. */
1027 static bfd_reloc_status_type
1028 i860_final_link_relocate (reloc_howto_type *howto,
1029 bfd *input_bfd,
1030 asection *input_section,
1031 bfd_byte *contents,
1032 Elf_Internal_Rela *rel,
1033 bfd_vma relocation)
1034 {
1035 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1036 contents, rel->r_offset, relocation,
1037 rel->r_addend);
1038 }
1039
1040 /* Relocate an i860 ELF section.
1041
1042 This is boiler-plate code copied from fr30.
1043
1044 The RELOCATE_SECTION function is called by the new ELF backend linker
1045 to handle the relocations for a section.
1046
1047 The relocs are always passed as Rela structures; if the section
1048 actually uses Rel structures, the r_addend field will always be
1049 zero.
1050
1051 This function is responsible for adjusting the section contents as
1052 necessary, and (if using Rela relocs and generating a relocatable
1053 output file) adjusting the reloc addend as necessary.
1054
1055 This function does not have to worry about setting the reloc
1056 address or the reloc symbol index.
1057
1058 LOCAL_SYMS is a pointer to the swapped in local symbols.
1059
1060 LOCAL_SECTIONS is an array giving the section in the input file
1061 corresponding to the st_shndx field of each local symbol.
1062
1063 The global hash table entry for the global symbols can be found
1064 via elf_sym_hashes (input_bfd).
1065
1066 When generating relocatable output, this function must handle
1067 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1068 going to be the section symbol corresponding to the output
1069 section, which means that the addend must be adjusted
1070 accordingly. */
1071 static bfd_boolean
1072 elf32_i860_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
1073 struct bfd_link_info *info,
1074 bfd *input_bfd,
1075 asection *input_section,
1076 bfd_byte *contents,
1077 Elf_Internal_Rela *relocs,
1078 Elf_Internal_Sym *local_syms,
1079 asection **local_sections)
1080 {
1081 Elf_Internal_Shdr *symtab_hdr;
1082 struct elf_link_hash_entry **sym_hashes;
1083 Elf_Internal_Rela *rel;
1084 Elf_Internal_Rela *relend;
1085
1086 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1087 sym_hashes = elf_sym_hashes (input_bfd);
1088 relend = relocs + input_section->reloc_count;
1089
1090 for (rel = relocs; rel < relend; rel ++)
1091 {
1092 reloc_howto_type * howto;
1093 unsigned long r_symndx;
1094 Elf_Internal_Sym * sym;
1095 asection * sec;
1096 struct elf_link_hash_entry * h;
1097 bfd_vma relocation;
1098 bfd_reloc_status_type r;
1099 const char * name = NULL;
1100 int r_type;
1101
1102 r_type = ELF32_R_TYPE (rel->r_info);
1103 r_symndx = ELF32_R_SYM (rel->r_info);
1104
1105 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info));
1106 h = NULL;
1107 sym = NULL;
1108 sec = NULL;
1109
1110 if (r_symndx < symtab_hdr->sh_info)
1111 {
1112 sym = local_syms + r_symndx;
1113 sec = local_sections [r_symndx];
1114 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1115
1116 name = bfd_elf_string_from_elf_section
1117 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1118 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1119 }
1120 else
1121 {
1122 bfd_boolean unresolved_reloc, warned, ignored;
1123
1124 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1125 r_symndx, symtab_hdr, sym_hashes,
1126 h, sec, relocation,
1127 unresolved_reloc, warned, ignored);
1128 }
1129
1130 if (sec != NULL && discarded_section (sec))
1131 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1132 rel, 1, relend, howto, 0, contents);
1133
1134 if (bfd_link_relocatable (info))
1135 continue;
1136
1137 switch (r_type)
1138 {
1139 default:
1140 r = i860_final_link_relocate (howto, input_bfd, input_section,
1141 contents, rel, relocation);
1142 break;
1143
1144 case R_860_HIGHADJ:
1145 r = elf32_i860_relocate_highadj (input_bfd, rel, contents,
1146 relocation);
1147 break;
1148
1149 case R_860_PC16:
1150 r = elf32_i860_relocate_pc16 (input_bfd, input_section, rel,
1151 contents, relocation);
1152 break;
1153
1154 case R_860_PC26:
1155 r = elf32_i860_relocate_pc26 (input_bfd, input_section, rel,
1156 contents, relocation);
1157 break;
1158
1159 case R_860_SPLIT0:
1160 case R_860_SPLIT1:
1161 case R_860_SPLIT2:
1162 r = elf32_i860_relocate_splitn (input_bfd, rel, contents,
1163 relocation);
1164 break;
1165
1166 /* We do not yet handle GOT/PLT/Dynamic relocations. */
1167 case R_860_COPY:
1168 case R_860_GLOB_DAT:
1169 case R_860_JUMP_SLOT:
1170 case R_860_RELATIVE:
1171 case R_860_PLT26:
1172 case R_860_LOGOT0:
1173 case R_860_SPGOT0:
1174 case R_860_LOGOT1:
1175 case R_860_SPGOT1:
1176 case R_860_LOGOTOFF0:
1177 case R_860_SPGOTOFF0:
1178 case R_860_LOGOTOFF1:
1179 case R_860_SPGOTOFF1:
1180 case R_860_LOGOTOFF2:
1181 case R_860_LOGOTOFF3:
1182 case R_860_LOPC:
1183 case R_860_HAGOT:
1184 case R_860_HAGOTOFF:
1185 case R_860_HAPC:
1186 case R_860_HIGOT:
1187 case R_860_HIGOTOFF:
1188 r = bfd_reloc_notsupported;
1189 break;
1190 }
1191
1192 if (r != bfd_reloc_ok)
1193 {
1194 const char * msg = (const char *) NULL;
1195
1196 switch (r)
1197 {
1198 case bfd_reloc_overflow:
1199 (*info->callbacks->reloc_overflow)
1200 (info, (h ? &h->root : NULL), name, howto->name,
1201 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1202 break;
1203
1204 case bfd_reloc_undefined:
1205 (*info->callbacks->undefined_symbol)
1206 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1207 break;
1208
1209 case bfd_reloc_outofrange:
1210 msg = _("internal error: out of range error");
1211 break;
1212
1213 case bfd_reloc_notsupported:
1214 msg = _("internal error: unsupported relocation error");
1215 break;
1216
1217 case bfd_reloc_dangerous:
1218 msg = _("internal error: dangerous relocation");
1219 break;
1220
1221 default:
1222 msg = _("internal error: unknown error");
1223 break;
1224 }
1225
1226 if (msg)
1227 (*info->callbacks->warning) (info, msg, name, input_bfd,
1228 input_section, rel->r_offset);
1229 }
1230 }
1231
1232 return TRUE;
1233 }
1234
1235 /* Return whether a symbol name implies a local label. SVR4/860 compilers
1236 generate labels of the form ".ep.function_name" to denote the end of a
1237 function prolog. These should be local.
1238 ??? Do any other SVR4 compilers have this convention? If so, this should
1239 be added to the generic routine. */
1240 static bfd_boolean
1241 elf32_i860_is_local_label_name (bfd *abfd, const char *name)
1242 {
1243 if (name[0] == '.' && name[1] == 'e' && name[2] == 'p' && name[3] == '.')
1244 return TRUE;
1245
1246 return _bfd_elf_is_local_label_name (abfd, name);
1247 }
1248 \f
1249 #define TARGET_BIG_SYM i860_elf32_vec
1250 #define TARGET_BIG_NAME "elf32-i860"
1251 #define TARGET_LITTLE_SYM i860_elf32_le_vec
1252 #define TARGET_LITTLE_NAME "elf32-i860-little"
1253 #define ELF_ARCH bfd_arch_i860
1254 #define ELF_MACHINE_CODE EM_860
1255 #define ELF_MAXPAGESIZE 4096
1256
1257 #define elf_backend_rela_normal 1
1258 #define elf_info_to_howto_rel NULL
1259 #define elf_info_to_howto elf32_i860_info_to_howto_rela
1260 #define elf_backend_relocate_section elf32_i860_relocate_section
1261 #define bfd_elf32_bfd_reloc_type_lookup elf32_i860_reloc_type_lookup
1262 #define bfd_elf32_bfd_reloc_name_lookup elf32_i860_reloc_name_lookup
1263 #define bfd_elf32_bfd_is_local_label_name elf32_i860_is_local_label_name
1264
1265 #include "elf32-target.h"
GDB Binutils - Deliverables
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