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Add Visium support to bfd
[deliverable/binutils-gdb.git] / bfd / elf32-visium.c
1 /* Visium-specific support for 32-bit ELF.
2
3 Copyright (C) 2003-2014 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 2, /* size (0 = byte, 1 = short, 2 = long) */
37 32, /* bitsize */
38 FALSE, /* pc_relative */
39 0, /* bitpos */
40 complain_overflow_bitfield, /* 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 /* Map BFD reloc types to VISIUM ELF reloc types. */
280 struct visium_reloc_map
281 {
282 bfd_reloc_code_real_type bfd_reloc_val;
283 unsigned int visium_reloc_val;
284 };
285
286 static const struct visium_reloc_map visium_reloc_map[] = {
287 {BFD_RELOC_NONE, R_VISIUM_NONE},
288 {BFD_RELOC_8, R_VISIUM_8},
289 {BFD_RELOC_16, R_VISIUM_16},
290 {BFD_RELOC_32, R_VISIUM_32},
291 {BFD_RELOC_8_PCREL, R_VISIUM_8_PCREL},
292 {BFD_RELOC_16_PCREL, R_VISIUM_16_PCREL},
293 {BFD_RELOC_32_PCREL, R_VISIUM_32_PCREL},
294 {BFD_RELOC_VISIUM_REL16, R_VISIUM_PC16},
295 {BFD_RELOC_VISIUM_HI16, R_VISIUM_HI16},
296 {BFD_RELOC_VISIUM_LO16, R_VISIUM_LO16},
297 {BFD_RELOC_VISIUM_IM16, R_VISIUM_IM16},
298 {BFD_RELOC_VISIUM_HI16_PCREL, R_VISIUM_HI16_PCREL},
299 {BFD_RELOC_VISIUM_LO16_PCREL, R_VISIUM_LO16_PCREL},
300 {BFD_RELOC_VISIUM_IM16_PCREL, R_VISIUM_IM16_PCREL},
301 {BFD_RELOC_VTABLE_INHERIT, R_VISIUM_GNU_VTINHERIT},
302 {BFD_RELOC_VTABLE_ENTRY, R_VISIUM_GNU_VTENTRY},
303 };
304
305 /* Return the parity bit for INSN shifted to its final position. */
306
307 static bfd_vma
308 visium_parity_bit (bfd_vma insn)
309 {
310 bfd_vma p = 0;
311 int i;
312
313 for (i = 0; i < 31; i++)
314 {
315 p ^= (insn & 1);
316 insn >>= 1;
317 }
318
319 return p << 31;
320 }
321
322 /* This "special function" will only be used when the input and
323 output files have different formats ie. when generating S-records
324 directly using "--oformat srec". Otherwise we use
325 _bfd_final_link_relocate which uses a howto structure, but does
326 not use the special_function field.
327
328 It sets instruction parity to even. This cannot be done by a howto. */
329
330 static bfd_reloc_status_type
331 visium_elf_howto_parity_reloc (bfd * input_bfd, arelent *reloc_entry,
332 asymbol *symbol, PTR data,
333 asection *input_section, bfd *output_bfd,
334 char **error_message ATTRIBUTE_UNUSED)
335 {
336 bfd_reloc_status_type ret;
337 bfd_vma relocation;
338 bfd_byte *inplace_address;
339 bfd_vma insn;
340 const bfd_vma signmask = 0xffff8000;
341
342 /* This part is from bfd_elf_generic_reloc.
343 If we're relocating, and this an external symbol, we don't want
344 to change anything. */
345 if (output_bfd != (bfd *) NULL && (symbol->flags & BSF_SECTION_SYM) == 0)
346 {
347 reloc_entry->address += input_section->output_offset;
348 return bfd_reloc_ok;
349 }
350
351 /* Now do the reloc in the usual way. */
352
353 /* Sanity check the address (offset in section). */
354 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section))
355 return bfd_reloc_outofrange;
356
357 ret = bfd_reloc_ok;
358 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL)
359 ret = bfd_reloc_undefined;
360
361 if (bfd_is_com_section (symbol->section) || output_bfd != (bfd *) NULL)
362 relocation = 0;
363 else
364 relocation = symbol->value;
365
366 /* Only do this for a final link. */
367 if (output_bfd == (bfd *) NULL)
368 {
369 relocation += symbol->section->output_section->vma;
370 relocation += symbol->section->output_offset;
371 }
372
373 relocation += reloc_entry->addend;
374 inplace_address = (bfd_byte *) data + reloc_entry->address;
375 insn = bfd_get_32 (input_bfd, inplace_address);
376
377 if (reloc_entry->howto->pc_relative)
378 {
379 relocation -= input_section->output_section->vma
380 + input_section->output_offset;
381 relocation -= reloc_entry->address;
382 }
383
384 switch (reloc_entry->howto->type)
385 {
386 case R_VISIUM_PC16:
387 relocation >>= 2;
388 if (ret == bfd_reloc_ok && (relocation & signmask) != 0
389 && (relocation & signmask) != signmask)
390 ret = bfd_reloc_overflow;
391 relocation &= 0xffff;
392 break;
393 case R_VISIUM_HI16:
394 case R_VISIUM_HI16_PCREL:
395 relocation = (relocation >> 16) & 0xffff;
396 break;
397 case R_VISIUM_LO16:
398 case R_VISIUM_LO16_PCREL:
399 relocation &= 0xffff;
400 break;
401 case R_VISIUM_IM16:
402 case R_VISIUM_IM16_PCREL:
403 if (ret == bfd_reloc_ok && (relocation & 0xffff0000) != 0)
404 ret = bfd_reloc_overflow;
405 relocation &= 0xffff;
406 break;
407 }
408 insn = (insn & 0x7fff0000) | relocation;
409 insn |= visium_parity_bit (insn);
410 bfd_put_32 (input_bfd, insn, inplace_address);
411
412 if (output_bfd != (bfd *) NULL)
413 reloc_entry->address += input_section->output_offset;
414
415 return ret;
416 }
417
418 static reloc_howto_type *
419 visium_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
420 bfd_reloc_code_real_type code)
421 {
422 /* Note that the visium_elf_howto_table is indexed by the R_
423 constants. Thus, the order that the howto records appear in the
424 table *must* match the order of the relocation types defined in
425 include/elf/visium.h. */
426 switch (code)
427 {
428 case BFD_RELOC_NONE:
429 return &visium_elf_howto_table[(int) R_VISIUM_NONE];
430 case BFD_RELOC_8:
431 return &visium_elf_howto_table[(int) R_VISIUM_8];
432 case BFD_RELOC_16:
433 return &visium_elf_howto_table[(int) R_VISIUM_16];
434 case BFD_RELOC_32:
435 return &visium_elf_howto_table[(int) R_VISIUM_32];
436 case BFD_RELOC_8_PCREL:
437 return &visium_elf_howto_table[(int) R_VISIUM_8_PCREL];
438 case BFD_RELOC_16_PCREL:
439 return &visium_elf_howto_table[(int) R_VISIUM_16_PCREL];
440 case BFD_RELOC_32_PCREL:
441 return &visium_elf_howto_table[(int) R_VISIUM_32_PCREL];
442 case BFD_RELOC_VISIUM_REL16:
443 return &visium_elf_howto_table[(int) R_VISIUM_PC16];
444 case BFD_RELOC_VISIUM_HI16:
445 return &visium_elf_howto_table[(int) R_VISIUM_HI16];
446 case BFD_RELOC_VISIUM_LO16:
447 return &visium_elf_howto_table[(int) R_VISIUM_LO16];
448 case BFD_RELOC_VISIUM_IM16:
449 return &visium_elf_howto_table[(int) R_VISIUM_IM16];
450 case BFD_RELOC_VISIUM_HI16_PCREL:
451 return &visium_elf_howto_table[(int) R_VISIUM_HI16_PCREL];
452 case BFD_RELOC_VISIUM_LO16_PCREL:
453 return &visium_elf_howto_table[(int) R_VISIUM_LO16_PCREL];
454 case BFD_RELOC_VISIUM_IM16_PCREL:
455 return &visium_elf_howto_table[(int) R_VISIUM_IM16_PCREL];
456 case BFD_RELOC_VTABLE_INHERIT:
457 return &visium_elf_vtinherit_howto;
458 case BFD_RELOC_VTABLE_ENTRY:
459 return &visium_elf_vtentry_howto;
460 default:
461 return NULL;
462 }
463 }
464
465 static reloc_howto_type *
466 visium_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
467 {
468 unsigned int i;
469
470 for (i = 0;
471 i < (sizeof (visium_elf_howto_table)
472 / sizeof (visium_elf_howto_table[0])); i++)
473 if (visium_elf_howto_table[i].name != NULL
474 && strcasecmp (visium_elf_howto_table[i].name, r_name) == 0)
475 return &visium_elf_howto_table[i];
476
477 if (strcasecmp (visium_elf_vtinherit_howto.name, r_name) == 0)
478 return &visium_elf_vtinherit_howto;
479 if (strcasecmp (visium_elf_vtentry_howto.name, r_name) == 0)
480 return &visium_elf_vtentry_howto;
481
482 return NULL;
483 }
484
485 /* Set the howto pointer for a VISIUM ELF reloc. */
486
487 static void
488 visium_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
489 Elf_Internal_Rela *dst)
490 {
491 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
492
493 switch (r_type)
494 {
495 case R_VISIUM_GNU_VTINHERIT:
496 cache_ptr->howto = &visium_elf_vtinherit_howto;
497 break;
498
499 case R_VISIUM_GNU_VTENTRY:
500 cache_ptr->howto = &visium_elf_vtentry_howto;
501 break;
502
503 default:
504 cache_ptr->howto = &visium_elf_howto_table[r_type];
505 break;
506 }
507 }
508
509 /* Look through the relocs for a section during the first phase.
510 Since we don't do .gots or .plts, we just need to consider the
511 virtual table relocs for gc. */
512
513 static bfd_boolean
514 visium_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
515 asection *sec, const Elf_Internal_Rela *relocs)
516 {
517 Elf_Internal_Shdr *symtab_hdr;
518 struct elf_link_hash_entry **sym_hashes;
519 const Elf_Internal_Rela *rel;
520 const Elf_Internal_Rela *rel_end;
521
522 if (info->relocatable)
523 return TRUE;
524
525 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
526 sym_hashes = elf_sym_hashes (abfd);
527
528 rel_end = relocs + sec->reloc_count;
529 for (rel = relocs; rel < rel_end; rel++)
530 {
531 struct elf_link_hash_entry *h;
532 unsigned long r_symndx;
533
534 r_symndx = ELF32_R_SYM (rel->r_info);
535 if (r_symndx < symtab_hdr->sh_info)
536 h = NULL;
537 else
538 {
539 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
540 while (h->root.type == bfd_link_hash_indirect
541 || h->root.type == bfd_link_hash_warning)
542 h = (struct elf_link_hash_entry *) h->root.u.i.link;
543 }
544
545 switch (ELF32_R_TYPE (rel->r_info))
546 {
547 /* This relocation describes the C++ object vtable hierarchy.
548 Reconstruct it for later use during GC. */
549 case R_VISIUM_GNU_VTINHERIT:
550 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
551 return FALSE;
552 break;
553
554 /* This relocation describes which C++ vtable entries are actually
555 used. Record for later use during GC. */
556 case R_VISIUM_GNU_VTENTRY:
557 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
558 return FALSE;
559 break;
560 }
561 }
562
563 return TRUE;
564 }
565
566 /* Relocate a VISIUM ELF section. */
567
568 static bfd_boolean
569 visium_elf_relocate_section (bfd *output_bfd,
570 struct bfd_link_info *info, bfd *input_bfd,
571 asection *input_section, bfd_byte *contents,
572 Elf_Internal_Rela *relocs,
573 Elf_Internal_Sym *local_syms,
574 asection **local_sections)
575 {
576 Elf_Internal_Shdr *symtab_hdr;
577 struct elf_link_hash_entry **sym_hashes;
578 Elf_Internal_Rela *rel;
579 Elf_Internal_Rela *relend;
580
581 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
582 sym_hashes = elf_sym_hashes (input_bfd);
583 relend = relocs + input_section->reloc_count;
584
585 for (rel = relocs; rel < relend; rel++)
586 {
587 reloc_howto_type *howto;
588 unsigned long r_symndx;
589 Elf_Internal_Sym *sym;
590 asection *sec;
591 struct elf_link_hash_entry *h;
592 bfd_vma relocation;
593 bfd_reloc_status_type r;
594 const char *name = NULL;
595 int r_type;
596 bfd_vma insn;
597
598 r_type = ELF32_R_TYPE (rel->r_info);
599
600 if (r_type == R_VISIUM_GNU_VTINHERIT || r_type == R_VISIUM_GNU_VTENTRY)
601 continue;
602
603 r_symndx = ELF32_R_SYM (rel->r_info);
604
605 howto = visium_elf_howto_table + ELF32_R_TYPE (rel->r_info);
606 h = NULL;
607 sym = NULL;
608 sec = NULL;
609
610 if (r_symndx < symtab_hdr->sh_info)
611 {
612 /* This is a local symbol. */
613 sym = local_syms + r_symndx;
614 sec = local_sections[r_symndx];
615 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
616
617 name = bfd_elf_string_from_elf_section
618 (input_bfd, symtab_hdr->sh_link, sym->st_name);
619 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
620 }
621 else
622 {
623 bfd_boolean unresolved_reloc;
624 bfd_boolean warned, ignored;
625
626 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
627 r_symndx, symtab_hdr, sym_hashes,
628 h, sec, relocation,
629 unresolved_reloc, warned, ignored);
630
631 name = h->root.root.string;
632 }
633
634 if (sec != NULL && discarded_section (sec))
635 {
636 /* For relocs against symbols from removed linkonce sections,
637 or sections discarded by a linker script, we just want the
638 section contents zeroed. Avoid any special processing. */
639 _bfd_clear_contents (howto, input_bfd, input_section,
640 contents + rel->r_offset);
641
642 rel->r_info = 0;
643 rel->r_addend = 0;
644 continue;
645 }
646
647 if (info->relocatable)
648 continue;
649
650 switch (r_type)
651 {
652 case R_VISIUM_PC16:
653 case R_VISIUM_HI16:
654 case R_VISIUM_LO16:
655 case R_VISIUM_IM16:
656 case R_VISIUM_HI16_PCREL:
657 case R_VISIUM_LO16_PCREL:
658 case R_VISIUM_IM16_PCREL:
659 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
660 contents, rel->r_offset,
661 relocation, rel->r_addend);
662
663 /* For instruction relocations, the parity needs correcting. */
664 if (r == bfd_reloc_ok)
665 {
666 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
667 insn = (insn & 0x7fffffff) | visium_parity_bit (insn);
668 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
669 }
670 break;
671
672 default:
673 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
674 contents, rel->r_offset,
675 relocation, rel->r_addend);
676 break;
677 }
678
679 if (r != bfd_reloc_ok)
680 {
681 const char *msg = (const char *) NULL;
682
683 switch (r)
684 {
685 case bfd_reloc_overflow:
686 r = info->callbacks->reloc_overflow
687 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
688 input_bfd, input_section, rel->r_offset);
689 break;
690
691 case bfd_reloc_undefined:
692 r = info->callbacks->undefined_symbol
693 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
694 break;
695
696 case bfd_reloc_outofrange:
697 msg = _("internal error: out of range error");
698 break;
699
700 case bfd_reloc_notsupported:
701 msg = _("internal error: unsupported relocation error");
702 break;
703
704 case bfd_reloc_dangerous:
705 msg = _("internal error: dangerous relocation");
706 break;
707
708 default:
709 msg = _("internal error: unknown error");
710 break;
711 }
712
713 if (msg)
714 r = info->callbacks->warning
715 (info, msg, name, input_bfd, input_section, rel->r_offset);
716
717 if (!r)
718 return FALSE;
719 }
720 }
721
722 return TRUE;
723 }
724
725 /* This function is called during section gc to discover the section a
726 to which a particular relocation refers. Return the section that
727 should be marked against GC for a given relocation. */
728
729 static asection *
730 visium_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info,
731 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h,
732 Elf_Internal_Sym *sym)
733 {
734 if (h != NULL)
735 switch (ELF32_R_TYPE (rel->r_info))
736 {
737 case R_VISIUM_GNU_VTINHERIT:
738 case R_VISIUM_GNU_VTENTRY:
739 return NULL;
740 }
741
742 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
743 }
744
745 static void
746 visium_elf_post_process_headers (bfd *abfd,
747 struct bfd_link_info *info ATTRIBUTE_UNUSED)
748 {
749 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
750 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_STANDALONE;
751 i_ehdrp->e_ident[EI_ABIVERSION] = 1;
752 }
753
754 /* Function to set the ELF flag bits. */
755
756 static bfd_boolean
757 visium_elf_set_private_flags (bfd *abfd, flagword flags)
758 {
759 elf_elfheader (abfd)->e_flags = flags;
760 elf_flags_init (abfd) = TRUE;
761 return TRUE;
762 }
763
764 /* Copy backend specific data from one object module to another. */
765
766 static bfd_boolean
767 visium_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
768 {
769 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
770 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
771 return TRUE;
772
773 BFD_ASSERT (!elf_flags_init (obfd)
774 || elf_elfheader (obfd)->e_flags ==
775 elf_elfheader (ibfd)->e_flags);
776
777 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
778 elf_flags_init (obfd) = TRUE;
779
780 /* Copy object attributes. */
781 _bfd_elf_copy_obj_attributes (ibfd, obfd);
782
783 return TRUE;
784 }
785
786 /* Merge backend specific data from an object
787 file to the output object file when linking. */
788
789 static bfd_boolean
790 visium_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
791 {
792 flagword old_flags;
793 flagword new_flags;
794 flagword mismatch;
795 const char *opt_arch = NULL;
796 const char *new_opt_with = NULL;
797 const char *old_opt_with = NULL;
798 const char *with = "with";
799 const char *without = "without";
800 const char *mcm = "mcm";
801 const char *mcm24 = "mcm24";
802 const char *gr6 = "gr6";
803
804 new_flags = elf_elfheader (ibfd)->e_flags;
805 old_flags = elf_elfheader (obfd)->e_flags;
806
807 if (!elf_flags_init (obfd))
808 {
809 /* First call, no flags set. */
810 elf_flags_init (obfd) = TRUE;
811 elf_elfheader (obfd)->e_flags = new_flags;
812 }
813 else
814 {
815 mismatch = (new_flags ^ old_flags)
816 & (EF_VISIUM_ARCH_MCM | EF_VISIUM_ARCH_MCM24 | EF_VISIUM_ARCH_GR6);
817 if (mismatch & EF_VISIUM_ARCH_GR6)
818 {
819 opt_arch = gr6;
820 new_opt_with = new_flags & EF_VISIUM_ARCH_GR6 ? with : without;
821 old_opt_with = old_flags & EF_VISIUM_ARCH_GR6 ? with : without;
822 }
823 else if (mismatch & EF_VISIUM_ARCH_MCM)
824 {
825 opt_arch = mcm;
826 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM ? with : without;
827 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM ? with : without;
828 }
829 else if (mismatch & EF_VISIUM_ARCH_MCM24)
830 {
831 opt_arch = mcm24;
832 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM24 ? with : without;
833 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM24 ? with : without;
834 }
835
836 if (mismatch)
837 _bfd_error_handler
838 (_
839 ("%s: compiled %s -mtune=%s and linked with modules"
840 " compiled %s -mtune=%s"),
841 bfd_get_filename (ibfd), new_opt_with, opt_arch, old_opt_with,
842 opt_arch);
843 }
844
845 return TRUE;
846 }
847
848 static bfd_boolean
849 visium_elf_print_private_bfd_data (bfd *abfd, void *ptr)
850 {
851 FILE *file = (FILE *) ptr;
852 flagword flags;
853
854 BFD_ASSERT (abfd != NULL && ptr != NULL);
855
856 /* Print normal ELF private data. */
857 _bfd_elf_print_private_bfd_data (abfd, ptr);
858
859 flags = elf_elfheader (abfd)->e_flags;
860 fprintf (file, _("private flags = 0x%lx:"), (long) flags);
861
862 if (flags & EF_VISIUM_ARCH_GR6)
863 fprintf (file, " -mtune=gr6");
864 else if (flags & EF_VISIUM_ARCH_MCM)
865 fprintf (file, " -mtune=mcm");
866 else if (flags & EF_VISIUM_ARCH_MCM24)
867 fprintf (file, " -mtune=mcm24");
868
869 fputc ('\n', file);
870 return TRUE;
871 }
872
873 #define ELF_ARCH bfd_arch_visium
874 #define ELF_MACHINE_CODE EM_VISIUM
875 #define ELF_MAXPAGESIZE 1
876
877 #define TARGET_BIG_SYM visium_elf32_vec
878 #define TARGET_BIG_NAME "elf32-visium"
879
880 #define elf_info_to_howto_rel NULL
881 #define elf_info_to_howto visium_info_to_howto_rela
882 #define elf_backend_relocate_section visium_elf_relocate_section
883 #define elf_backend_gc_mark_hook visium_elf_gc_mark_hook
884 #define elf_backend_check_relocs visium_elf_check_relocs
885 #define elf_backend_rela_normal 1
886
887 #define elf_backend_can_gc_sections 1
888
889 #define bfd_elf32_bfd_reloc_type_lookup visium_reloc_type_lookup
890 #define bfd_elf32_bfd_reloc_name_lookup visium_reloc_name_lookup
891
892 #define bfd_elf32_bfd_set_private_flags visium_elf_set_private_flags
893 #define bfd_elf32_bfd_copy_private_bfd_data visium_elf_copy_private_bfd_data
894 #define bfd_elf32_bfd_merge_private_bfd_data visium_elf_merge_private_bfd_data
895 #define bfd_elf32_bfd_print_private_bfd_data visium_elf_print_private_bfd_data
896 #define elf_backend_post_process_headers visium_elf_post_process_headers
897
898 #include "elf32-target.h"
GDB Binutils - Deliverables
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