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[deliverable/binutils-gdb.git] / bfd / elf32-visium.c
1 /* Visium-specific support for 32-bit ELF.
2
3 Copyright (C) 2003-2017 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/visium.h"
28
29 static bfd_reloc_status_type visium_elf_howto_parity_reloc
30 (bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **);
31
32 static reloc_howto_type visium_elf_howto_table[] = {
33 /* This reloc does nothing. */
34 HOWTO (R_VISIUM_NONE, /* type */
35 0, /* rightshift */
36 3, /* size (0 = byte, 1 = short, 2 = long) */
37 0, /* bitsize */
38 FALSE, /* pc_relative */
39 0, /* bitpos */
40 complain_overflow_dont, /* complain_on_overflow */
41 bfd_elf_generic_reloc, /* special_function */
42 "R_VISIUM_NONE", /* name */
43 FALSE, /* partial_inplace */
44 0, /* src_mask */
45 0, /* dst_mask */
46 FALSE), /* pcrel_offset */
47
48 /* A 8 bit absolute relocation. */
49 HOWTO (R_VISIUM_8, /* type */
50 0, /* rightshift */
51 0, /* size (0 = byte, 1 = short, 2 = long) */
52 8, /* bitsize */
53 FALSE, /* pc_relative */
54 0, /* bitpos */
55 complain_overflow_bitfield, /* complain_on_overflow */
56 bfd_elf_generic_reloc, /* special_function */
57 "R_VISIUM_8", /* name */
58 FALSE, /* partial_inplace */
59 0x00, /* src_mask */
60 0xff, /* dst_mask */
61 FALSE), /* pcrel_offset */
62
63 /* A 16 bit absolute relocation. */
64 HOWTO (R_VISIUM_16, /* type */
65 0, /* rightshift */
66 1, /* size (0 = byte, 1 = short, 2 = long) */
67 16, /* bitsize */
68 FALSE, /* pc_relative */
69 0, /* bitpos */
70 complain_overflow_bitfield, /* complain_on_overflow */
71 bfd_elf_generic_reloc, /* special_function */
72 "R_VISIUM_16", /* name */
73 FALSE, /* partial_inplace */
74 0x0000, /* src_mask */
75 0xffff, /* dst_mask */
76 FALSE), /* pcrel_offset */
77
78 /* A 32 bit absolute relocation. */
79 HOWTO (R_VISIUM_32, /* type */
80 0, /* rightshift */
81 2, /* size (0 = byte, 1 = short, 2 = long) */
82 32, /* bitsize */
83 FALSE, /* pc_relative */
84 0, /* bitpos */
85 complain_overflow_bitfield, /* complain_on_overflow */
86 bfd_elf_generic_reloc, /* special_function */
87 "R_VISIUM_32", /* name */
88 FALSE, /* partial_inplace */
89 0x00000000, /* src_mask */
90 0xffffffff, /* dst_mask */
91 FALSE), /* pcrel_offset */
92
93
94 /* A 8 bit PC relative relocation. */
95 HOWTO (R_VISIUM_8_PCREL, /* type */
96 0, /* rightshift */
97 0, /* size (0 = byte, 1 = short, 2 = long) */
98 8, /* bitsize */
99 TRUE, /* pc_relative */
100 0, /* bitpos */
101 complain_overflow_bitfield, /* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_VISIUM_8_PCREL", /* name */
104 FALSE, /* partial_inplace */
105 0x00, /* src_mask */
106 0xff, /* dst_mask */
107 TRUE), /* pcrel_offset */
108
109 /* A 16 bit PC relative relocation. */
110 HOWTO (R_VISIUM_16_PCREL, /* type */
111 0, /* rightshift */
112 1, /* size (0 = byte, 1 = short, 2 = long) */
113 16, /* bitsize */
114 TRUE, /* pc_relative */
115 0, /* bitpos */
116 complain_overflow_bitfield, /* complain_on_overflow */
117 bfd_elf_generic_reloc, /* special_function */
118 "R_VISIUM_16_PCREL", /* name */
119 FALSE, /* partial inplace */
120 0x0000, /* src_mask */
121 0xffff, /* dst_mask */
122 TRUE), /* pcrel_offset */
123
124 /* A 32-bit PC relative relocation. */
125 HOWTO (R_VISIUM_32_PCREL, /* type */
126 0, /* rightshift */
127 2, /* size (0 = byte, 1 = short, 2 = long) */
128 32, /* bitsize */
129 TRUE, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_bitfield, /* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_VISIUM_32_PCREL", /* name */
134 FALSE, /* partial_inplace */
135 0, /* src_mask */
136 0xffffffff, /* dst_mask */
137 TRUE), /* pcrel_offset */
138
139 /* A 16-bit PC word relative offset, relative to start of instruction
140 and always in the second half of the instruction. */
141 HOWTO (R_VISIUM_PC16, /* type */
142 2, /* rightshift */
143 2, /* size (0 = byte, 1 = short, 2 = long) */
144 16, /* bitsize */
145 TRUE, /* pc_relative */
146 0, /* bitpos */
147 complain_overflow_signed, /* complain_on_overflow */
148 visium_elf_howto_parity_reloc, /* special_function */
149 "R_VISIUM_PC16", /* name */
150 FALSE, /* partial_inplace */
151 0x00000000, /* src_mask */
152 0x0000ffff, /* dst_mask */
153 TRUE), /* pcrel_offset */
154
155 /* The high 16 bits of symbol value. */
156 HOWTO (R_VISIUM_HI16, /* type */
157 16, /* rightshift */
158 2, /* size (0 = byte, 1 = short, 2 = long) */
159 16, /* bitsize */
160 FALSE, /* pc_relative */
161 0, /* bitpos */
162 complain_overflow_dont, /* complain_on_overflow */
163 visium_elf_howto_parity_reloc, /* special_function */
164 "R_VISIUM_HI16", /* name */
165 FALSE, /* partial_inplace */
166 0x00000000, /* src_mask */
167 0x0000ffff, /* dst_mask */
168 FALSE), /* pcrel_offset */
169
170 /* The low 16 bits of symbol value. */
171 HOWTO (R_VISIUM_LO16, /* type */
172 0, /* rightshift */
173 2, /* size (0 = byte, 1 = short, 2 = long) */
174 16, /* bitsize */
175 FALSE, /* pc_relative */
176 0, /* bitpos */
177 complain_overflow_dont, /* complain_on_overflow */
178 visium_elf_howto_parity_reloc, /* special_function */
179 "R_VISIUM_LO16", /* name */
180 FALSE, /* partial_inplace */
181 0x00000000, /* src_mask */
182 0x0000ffff, /* dst_mask */
183 FALSE), /* pcrel_offset */
184
185 /* A 16 bit immediate value. */
186 HOWTO (R_VISIUM_IM16, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 16, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_unsigned, /* complain_on_overflow */
193 visium_elf_howto_parity_reloc, /* special_function */
194 "R_VISIUM_IM16", /* name */
195 FALSE, /* partial_inplace */
196 0x0000000, /* src_mask */
197 0x000ffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* The high 16 bits of symbol value, pc relative. */
201 HOWTO (R_VISIUM_HI16_PCREL, /* type */
202 16, /* rightshift */
203 2, /* size (0 = byte, 1 = short, 2 = long) */
204 16, /* bitsize */
205 TRUE, /* pc_relative */
206 0, /* bitpos */
207 complain_overflow_dont, /* complain_on_overflow */
208 visium_elf_howto_parity_reloc, /* special_function */
209 "R_VISIUM_HI16_PCREL", /* name */
210 FALSE, /* partial_inplace */
211 0x00000000, /* src_mask */
212 0x0000ffff, /* dst_mask */
213 TRUE), /* pcrel_offset */
214
215 /* The low 16 bits of symbol value, pc relative. */
216 HOWTO (R_VISIUM_LO16_PCREL, /* type */
217 0, /* rightshift */
218 2, /* size (0 = byte, 1 = short, 2 = long) */
219 16, /* bitsize */
220 TRUE, /* pc_relative */
221 0, /* bitpos */
222 complain_overflow_dont, /* complain_on_overflow */
223 visium_elf_howto_parity_reloc, /* special_function */
224 "R_VISIUM_LO16_PCREL", /* name */
225 FALSE, /* partial_inplace */
226 0x00000000, /* src_mask */
227 0x0000ffff, /* dst_mask */
228 TRUE), /* pcrel_offset */
229
230 /* A 16 bit immediate value, pc relative. */
231 HOWTO (R_VISIUM_IM16_PCREL, /* type */
232 0, /* rightshift */
233 2, /* size (0 = byte, 1 = short, 2 = long) */
234 16, /* bitsize */
235 TRUE, /* pc_relative */
236 0, /* bitpos */
237 complain_overflow_unsigned, /* complain_on_overflow */
238 visium_elf_howto_parity_reloc, /* special_function */
239 "R_VISIUM_IM16_PCREL", /* name */
240 FALSE, /* partial_inplace */
241 0x0000000, /* src_mask */
242 0x000ffff, /* dst_mask */
243 TRUE), /* pcrel_offset */
244
245 };
246
247 /* GNU extension to record C++ vtable hierarchy. */
248 static reloc_howto_type visium_elf_vtinherit_howto =
249 HOWTO (R_VISIUM_GNU_VTINHERIT, /* type */
250 0, /* rightshift */
251 2, /* size (0 = byte, 1 = short, 2 = long) */
252 0, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont, /* complain_on_overflow */
256 NULL, /* special_function */
257 "R_VISIUM_GNU_VTINHERIT", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0, /* dst_mask */
261 FALSE); /* pcrel_offset */
262
263 /* GNU extension to record C++ vtable member usage. */
264 static reloc_howto_type visium_elf_vtentry_howto =
265 HOWTO (R_VISIUM_GNU_VTENTRY, /* type */
266 0, /* rightshift */
267 2, /* 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 NULL, /* special_function */
273 "R_VISIUM_GNU_VTENTRY", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0, /* dst_mask */
277 FALSE); /* pcrel_offset */
278
279 /* Return the parity bit for INSN shifted to its final position. */
280
281 static bfd_vma
282 visium_parity_bit (bfd_vma insn)
283 {
284 bfd_vma p = 0;
285 int i;
286
287 for (i = 0; i < 31; i++)
288 {
289 p ^= (insn & 1);
290 insn >>= 1;
291 }
292
293 return p << 31;
294 }
295
296 /* This "special function" will only be used when the input and
297 output files have different formats ie. when generating S-records
298 directly using "--oformat srec". Otherwise we use
299 _bfd_final_link_relocate which uses a howto structure, but does
300 not use the special_function field.
301
302 It sets instruction parity to even. This cannot be done by a howto. */
303
304 static bfd_reloc_status_type
305 visium_elf_howto_parity_reloc (bfd * input_bfd, arelent *reloc_entry,
306 asymbol *symbol, PTR data,
307 asection *input_section, bfd *output_bfd,
308 char **error_message ATTRIBUTE_UNUSED)
309 {
310 bfd_reloc_status_type ret;
311 bfd_vma relocation;
312 bfd_byte *inplace_address;
313 bfd_vma insn;
314 const bfd_vma signmask = 0xffff8000;
315
316 /* This part is from bfd_elf_generic_reloc.
317 If we're relocating, and this an external symbol, we don't want
318 to change anything. */
319 if (output_bfd != (bfd *) NULL && (symbol->flags & BSF_SECTION_SYM) == 0)
320 {
321 reloc_entry->address += input_section->output_offset;
322 return bfd_reloc_ok;
323 }
324
325 /* Now do the reloc in the usual way. */
326
327 /* Sanity check the address (offset in section). */
328 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section))
329 return bfd_reloc_outofrange;
330
331 ret = bfd_reloc_ok;
332 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL)
333 ret = bfd_reloc_undefined;
334
335 if (bfd_is_com_section (symbol->section) || output_bfd != (bfd *) NULL)
336 relocation = 0;
337 else
338 relocation = symbol->value;
339
340 /* Only do this for a final link. */
341 if (output_bfd == (bfd *) NULL)
342 {
343 relocation += symbol->section->output_section->vma;
344 relocation += symbol->section->output_offset;
345 }
346
347 relocation += reloc_entry->addend;
348 inplace_address = (bfd_byte *) data + reloc_entry->address;
349 insn = bfd_get_32 (input_bfd, inplace_address);
350
351 if (reloc_entry->howto->pc_relative)
352 {
353 relocation -= input_section->output_section->vma
354 + input_section->output_offset;
355 relocation -= reloc_entry->address;
356 }
357
358 switch (reloc_entry->howto->type)
359 {
360 case R_VISIUM_PC16:
361 relocation >>= 2;
362 if (ret == bfd_reloc_ok && (relocation & signmask) != 0
363 && (relocation & signmask) != signmask)
364 ret = bfd_reloc_overflow;
365 relocation &= 0xffff;
366 break;
367 case R_VISIUM_HI16:
368 case R_VISIUM_HI16_PCREL:
369 relocation = (relocation >> 16) & 0xffff;
370 break;
371 case R_VISIUM_LO16:
372 case R_VISIUM_LO16_PCREL:
373 relocation &= 0xffff;
374 break;
375 case R_VISIUM_IM16:
376 case R_VISIUM_IM16_PCREL:
377 if (ret == bfd_reloc_ok && (relocation & 0xffff0000) != 0)
378 ret = bfd_reloc_overflow;
379 relocation &= 0xffff;
380 break;
381 }
382 insn = (insn & 0x7fff0000) | relocation;
383 insn |= visium_parity_bit (insn);
384 bfd_put_32 (input_bfd, insn, inplace_address);
385
386 if (output_bfd != (bfd *) NULL)
387 reloc_entry->address += input_section->output_offset;
388
389 return ret;
390 }
391
392 static reloc_howto_type *
393 visium_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
394 bfd_reloc_code_real_type code)
395 {
396 /* Note that the visium_elf_howto_table is indexed by the R_
397 constants. Thus, the order that the howto records appear in the
398 table *must* match the order of the relocation types defined in
399 include/elf/visium.h. */
400 switch (code)
401 {
402 case BFD_RELOC_NONE:
403 return &visium_elf_howto_table[(int) R_VISIUM_NONE];
404 case BFD_RELOC_8:
405 return &visium_elf_howto_table[(int) R_VISIUM_8];
406 case BFD_RELOC_16:
407 return &visium_elf_howto_table[(int) R_VISIUM_16];
408 case BFD_RELOC_32:
409 return &visium_elf_howto_table[(int) R_VISIUM_32];
410 case BFD_RELOC_8_PCREL:
411 return &visium_elf_howto_table[(int) R_VISIUM_8_PCREL];
412 case BFD_RELOC_16_PCREL:
413 return &visium_elf_howto_table[(int) R_VISIUM_16_PCREL];
414 case BFD_RELOC_32_PCREL:
415 return &visium_elf_howto_table[(int) R_VISIUM_32_PCREL];
416 case BFD_RELOC_VISIUM_REL16:
417 return &visium_elf_howto_table[(int) R_VISIUM_PC16];
418 case BFD_RELOC_VISIUM_HI16:
419 return &visium_elf_howto_table[(int) R_VISIUM_HI16];
420 case BFD_RELOC_VISIUM_LO16:
421 return &visium_elf_howto_table[(int) R_VISIUM_LO16];
422 case BFD_RELOC_VISIUM_IM16:
423 return &visium_elf_howto_table[(int) R_VISIUM_IM16];
424 case BFD_RELOC_VISIUM_HI16_PCREL:
425 return &visium_elf_howto_table[(int) R_VISIUM_HI16_PCREL];
426 case BFD_RELOC_VISIUM_LO16_PCREL:
427 return &visium_elf_howto_table[(int) R_VISIUM_LO16_PCREL];
428 case BFD_RELOC_VISIUM_IM16_PCREL:
429 return &visium_elf_howto_table[(int) R_VISIUM_IM16_PCREL];
430 case BFD_RELOC_VTABLE_INHERIT:
431 return &visium_elf_vtinherit_howto;
432 case BFD_RELOC_VTABLE_ENTRY:
433 return &visium_elf_vtentry_howto;
434 default:
435 return NULL;
436 }
437 }
438
439 static reloc_howto_type *
440 visium_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
441 {
442 unsigned int i;
443
444 for (i = 0;
445 i < (sizeof (visium_elf_howto_table)
446 / sizeof (visium_elf_howto_table[0])); i++)
447 if (visium_elf_howto_table[i].name != NULL
448 && strcasecmp (visium_elf_howto_table[i].name, r_name) == 0)
449 return &visium_elf_howto_table[i];
450
451 if (strcasecmp (visium_elf_vtinherit_howto.name, r_name) == 0)
452 return &visium_elf_vtinherit_howto;
453 if (strcasecmp (visium_elf_vtentry_howto.name, r_name) == 0)
454 return &visium_elf_vtentry_howto;
455
456 return NULL;
457 }
458
459 /* Set the howto pointer for a VISIUM ELF reloc. */
460
461 static void
462 visium_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
463 Elf_Internal_Rela *dst)
464 {
465 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
466
467 switch (r_type)
468 {
469 case R_VISIUM_GNU_VTINHERIT:
470 cache_ptr->howto = &visium_elf_vtinherit_howto;
471 break;
472
473 case R_VISIUM_GNU_VTENTRY:
474 cache_ptr->howto = &visium_elf_vtentry_howto;
475 break;
476
477 default:
478 if (r_type >= (unsigned int) R_VISIUM_max)
479 {
480 /* xgettext:c-format */
481 _bfd_error_handler (_("%B: invalid Visium reloc number: %d"), abfd, r_type);
482 r_type = 0;
483 }
484 cache_ptr->howto = &visium_elf_howto_table[r_type];
485 break;
486 }
487 }
488
489 /* Look through the relocs for a section during the first phase.
490 Since we don't do .gots or .plts, we just need to consider the
491 virtual table relocs for gc. */
492
493 static bfd_boolean
494 visium_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
495 asection *sec, const Elf_Internal_Rela *relocs)
496 {
497 Elf_Internal_Shdr *symtab_hdr;
498 struct elf_link_hash_entry **sym_hashes;
499 const Elf_Internal_Rela *rel;
500 const Elf_Internal_Rela *rel_end;
501
502 if (bfd_link_relocatable (info))
503 return TRUE;
504
505 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
506 sym_hashes = elf_sym_hashes (abfd);
507
508 rel_end = relocs + sec->reloc_count;
509 for (rel = relocs; rel < rel_end; rel++)
510 {
511 struct elf_link_hash_entry *h;
512 unsigned long r_symndx;
513
514 r_symndx = ELF32_R_SYM (rel->r_info);
515 if (r_symndx < symtab_hdr->sh_info)
516 h = NULL;
517 else
518 {
519 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
520 while (h->root.type == bfd_link_hash_indirect
521 || h->root.type == bfd_link_hash_warning)
522 h = (struct elf_link_hash_entry *) h->root.u.i.link;
523 }
524
525 switch (ELF32_R_TYPE (rel->r_info))
526 {
527 /* This relocation describes the C++ object vtable hierarchy.
528 Reconstruct it for later use during GC. */
529 case R_VISIUM_GNU_VTINHERIT:
530 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
531 return FALSE;
532 break;
533
534 /* This relocation describes which C++ vtable entries are actually
535 used. Record for later use during GC. */
536 case R_VISIUM_GNU_VTENTRY:
537 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
538 return FALSE;
539 break;
540 }
541 }
542
543 return TRUE;
544 }
545
546 /* Relocate a VISIUM ELF section. */
547
548 static bfd_boolean
549 visium_elf_relocate_section (bfd *output_bfd,
550 struct bfd_link_info *info, bfd *input_bfd,
551 asection *input_section, bfd_byte *contents,
552 Elf_Internal_Rela *relocs,
553 Elf_Internal_Sym *local_syms,
554 asection **local_sections)
555 {
556 Elf_Internal_Shdr *symtab_hdr;
557 struct elf_link_hash_entry **sym_hashes;
558 Elf_Internal_Rela *rel;
559 Elf_Internal_Rela *relend;
560
561 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
562 sym_hashes = elf_sym_hashes (input_bfd);
563 relend = relocs + input_section->reloc_count;
564
565 for (rel = relocs; rel < relend; rel++)
566 {
567 reloc_howto_type *howto;
568 unsigned long r_symndx;
569 Elf_Internal_Sym *sym;
570 asection *sec;
571 struct elf_link_hash_entry *h;
572 bfd_vma relocation;
573 bfd_reloc_status_type r;
574 const char *name = NULL;
575 int r_type;
576 bfd_vma insn;
577
578 r_type = ELF32_R_TYPE (rel->r_info);
579
580 if (r_type == R_VISIUM_GNU_VTINHERIT || r_type == R_VISIUM_GNU_VTENTRY)
581 continue;
582
583 r_symndx = ELF32_R_SYM (rel->r_info);
584
585 howto = visium_elf_howto_table + ELF32_R_TYPE (rel->r_info);
586 h = NULL;
587 sym = NULL;
588 sec = NULL;
589
590 if (r_symndx < symtab_hdr->sh_info)
591 {
592 /* This is a local symbol. */
593 sym = local_syms + r_symndx;
594 sec = local_sections[r_symndx];
595 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
596
597 name = bfd_elf_string_from_elf_section
598 (input_bfd, symtab_hdr->sh_link, sym->st_name);
599 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
600 }
601 else
602 {
603 bfd_boolean unresolved_reloc;
604 bfd_boolean warned, ignored;
605
606 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
607 r_symndx, symtab_hdr, sym_hashes,
608 h, sec, relocation,
609 unresolved_reloc, warned, ignored);
610
611 name = h->root.root.string;
612 }
613
614 if (sec != NULL && discarded_section (sec))
615 {
616 /* For relocs against symbols from removed linkonce sections,
617 or sections discarded by a linker script, we just want the
618 section contents zeroed. Avoid any special processing. */
619 _bfd_clear_contents (howto, input_bfd, input_section,
620 contents + rel->r_offset);
621
622 rel->r_info = 0;
623 rel->r_addend = 0;
624 continue;
625 }
626
627 if (bfd_link_relocatable (info))
628 continue;
629
630 switch (r_type)
631 {
632 case R_VISIUM_PC16:
633 case R_VISIUM_HI16:
634 case R_VISIUM_LO16:
635 case R_VISIUM_IM16:
636 case R_VISIUM_HI16_PCREL:
637 case R_VISIUM_LO16_PCREL:
638 case R_VISIUM_IM16_PCREL:
639 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
640 contents, rel->r_offset,
641 relocation, rel->r_addend);
642
643 /* For instruction relocations, the parity needs correcting. */
644 if (r == bfd_reloc_ok)
645 {
646 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
647 insn = (insn & 0x7fffffff) | visium_parity_bit (insn);
648 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
649 }
650 break;
651
652 default:
653 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
654 contents, rel->r_offset,
655 relocation, rel->r_addend);
656 break;
657 }
658
659 if (r != bfd_reloc_ok)
660 {
661 const char *msg = (const char *) NULL;
662
663 switch (r)
664 {
665 case bfd_reloc_overflow:
666 (*info->callbacks->reloc_overflow)
667 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
668 input_bfd, input_section, rel->r_offset);
669 break;
670
671 case bfd_reloc_undefined:
672 (*info->callbacks->undefined_symbol)
673 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
674 break;
675
676 case bfd_reloc_outofrange:
677 msg = _("internal error: out of range error");
678 break;
679
680 case bfd_reloc_notsupported:
681 msg = _("internal error: unsupported relocation error");
682 break;
683
684 case bfd_reloc_dangerous:
685 msg = _("internal error: dangerous relocation");
686 break;
687
688 default:
689 msg = _("internal error: unknown error");
690 break;
691 }
692
693 if (msg)
694 (*info->callbacks->warning) (info, msg, name, input_bfd,
695 input_section, rel->r_offset);
696 }
697 }
698
699 return TRUE;
700 }
701
702 /* This function is called during section gc to discover the section a
703 to which a particular relocation refers. Return the section that
704 should be marked against GC for a given relocation. */
705
706 static asection *
707 visium_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info,
708 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h,
709 Elf_Internal_Sym *sym)
710 {
711 if (h != NULL)
712 switch (ELF32_R_TYPE (rel->r_info))
713 {
714 case R_VISIUM_GNU_VTINHERIT:
715 case R_VISIUM_GNU_VTENTRY:
716 return NULL;
717 }
718
719 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
720 }
721
722 static void
723 visium_elf_post_process_headers (bfd *abfd,
724 struct bfd_link_info *info ATTRIBUTE_UNUSED)
725 {
726 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
727 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_STANDALONE;
728 i_ehdrp->e_ident[EI_ABIVERSION] = 1;
729 }
730
731 /* Function to set the ELF flag bits. */
732
733 static bfd_boolean
734 visium_elf_set_private_flags (bfd *abfd, flagword flags)
735 {
736 elf_elfheader (abfd)->e_flags = flags;
737 elf_flags_init (abfd) = TRUE;
738 return TRUE;
739 }
740
741 /* Copy backend specific data from one object module to another. */
742
743 static bfd_boolean
744 visium_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
745 {
746 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
747 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
748 return TRUE;
749
750 BFD_ASSERT (!elf_flags_init (obfd)
751 || elf_elfheader (obfd)->e_flags ==
752 elf_elfheader (ibfd)->e_flags);
753
754 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
755 elf_flags_init (obfd) = TRUE;
756
757 /* Copy object attributes. */
758 _bfd_elf_copy_obj_attributes (ibfd, obfd);
759
760 return TRUE;
761 }
762
763 /* Merge backend specific data from an object
764 file to the output object file when linking. */
765
766 static bfd_boolean
767 visium_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
768 {
769 bfd *obfd = info->output_bfd;
770 flagword old_flags;
771 flagword new_flags;
772 flagword mismatch;
773 const char *opt_arch = NULL;
774 const char *new_opt_with = NULL;
775 const char *old_opt_with = NULL;
776 const char *with = "with";
777 const char *without = "without";
778 const char *mcm = "mcm";
779 const char *mcm24 = "mcm24";
780 const char *gr6 = "gr6";
781
782 new_flags = elf_elfheader (ibfd)->e_flags;
783 old_flags = elf_elfheader (obfd)->e_flags;
784
785 if (!elf_flags_init (obfd))
786 {
787 /* First call, no flags set. */
788 elf_flags_init (obfd) = TRUE;
789 elf_elfheader (obfd)->e_flags = new_flags;
790 }
791 else
792 {
793 mismatch = (new_flags ^ old_flags)
794 & (EF_VISIUM_ARCH_MCM | EF_VISIUM_ARCH_MCM24 | EF_VISIUM_ARCH_GR6);
795 if (mismatch & EF_VISIUM_ARCH_GR6)
796 {
797 opt_arch = gr6;
798 new_opt_with = new_flags & EF_VISIUM_ARCH_GR6 ? with : without;
799 old_opt_with = old_flags & EF_VISIUM_ARCH_GR6 ? with : without;
800 }
801 else if (mismatch & EF_VISIUM_ARCH_MCM)
802 {
803 opt_arch = mcm;
804 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM ? with : without;
805 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM ? with : without;
806 }
807 else if (mismatch & EF_VISIUM_ARCH_MCM24)
808 {
809 opt_arch = mcm24;
810 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM24 ? with : without;
811 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM24 ? with : without;
812 }
813
814 if (mismatch)
815 _bfd_error_handler
816 /* xgettext:c-format */
817 (_("%s: compiled %s -mtune=%s and linked with modules"
818 " compiled %s -mtune=%s"),
819 bfd_get_filename (ibfd), new_opt_with, opt_arch, old_opt_with,
820 opt_arch);
821 }
822
823 return TRUE;
824 }
825
826 static bfd_boolean
827 visium_elf_print_private_bfd_data (bfd *abfd, void *ptr)
828 {
829 FILE *file = (FILE *) ptr;
830 flagword flags;
831
832 BFD_ASSERT (abfd != NULL && ptr != NULL);
833
834 /* Print normal ELF private data. */
835 _bfd_elf_print_private_bfd_data (abfd, ptr);
836
837 flags = elf_elfheader (abfd)->e_flags;
838 fprintf (file, _("private flags = 0x%lx:"), (long) flags);
839
840 if (flags & EF_VISIUM_ARCH_GR6)
841 fprintf (file, " -mtune=gr6");
842 else if (flags & EF_VISIUM_ARCH_MCM)
843 fprintf (file, " -mtune=mcm");
844 else if (flags & EF_VISIUM_ARCH_MCM24)
845 fprintf (file, " -mtune=mcm24");
846
847 fputc ('\n', file);
848 return TRUE;
849 }
850
851 #define ELF_ARCH bfd_arch_visium
852 #define ELF_MACHINE_CODE EM_VISIUM
853 #define ELF_MAXPAGESIZE 1
854
855 #define TARGET_BIG_SYM visium_elf32_vec
856 #define TARGET_BIG_NAME "elf32-visium"
857
858 #define elf_info_to_howto_rel NULL
859 #define elf_info_to_howto visium_info_to_howto_rela
860 #define elf_backend_relocate_section visium_elf_relocate_section
861 #define elf_backend_gc_mark_hook visium_elf_gc_mark_hook
862 #define elf_backend_check_relocs visium_elf_check_relocs
863 #define elf_backend_rela_normal 1
864
865 #define elf_backend_can_gc_sections 1
866
867 #define bfd_elf32_bfd_reloc_type_lookup visium_reloc_type_lookup
868 #define bfd_elf32_bfd_reloc_name_lookup visium_reloc_name_lookup
869
870 #define bfd_elf32_bfd_set_private_flags visium_elf_set_private_flags
871 #define bfd_elf32_bfd_copy_private_bfd_data visium_elf_copy_private_bfd_data
872 #define bfd_elf32_bfd_merge_private_bfd_data visium_elf_merge_private_bfd_data
873 #define bfd_elf32_bfd_print_private_bfd_data visium_elf_print_private_bfd_data
874 #define elf_backend_post_process_headers visium_elf_post_process_headers
875
876 #include "elf32-target.h"
GDB Binutils - Deliverables
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