1 /* Visium-specific support for 32-bit ELF.
2
3 Copyright (C) 2003-2021 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 #include "libiberty.h"
29
30 static bfd_reloc_status_type visium_elf_howto_parity_reloc
31 (bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **);
32
33 static reloc_howto_type visium_elf_howto_table[] = {
34 /* This reloc does nothing. */
35 HOWTO (R_VISIUM_NONE, /* type */
36 0, /* rightshift */
37 3, /* size (0 = byte, 1 = short, 2 = long) */
38 0, /* bitsize */
39 false, /* pc_relative */
40 0, /* bitpos */
41 complain_overflow_dont, /* complain_on_overflow */
42 bfd_elf_generic_reloc, /* special_function */
43 "R_VISIUM_NONE", /* name */
44 false, /* partial_inplace */
45 0, /* src_mask */
46 0, /* dst_mask */
47 false), /* pcrel_offset */
48
49 /* A 8 bit absolute relocation. */
50 HOWTO (R_VISIUM_8, /* type */
51 0, /* rightshift */
52 0, /* size (0 = byte, 1 = short, 2 = long) */
53 8, /* bitsize */
54 false, /* pc_relative */
55 0, /* bitpos */
56 complain_overflow_bitfield, /* complain_on_overflow */
57 bfd_elf_generic_reloc, /* special_function */
58 "R_VISIUM_8", /* name */
59 false, /* partial_inplace */
60 0x00, /* src_mask */
61 0xff, /* dst_mask */
62 false), /* pcrel_offset */
63
64 /* A 16 bit absolute relocation. */
65 HOWTO (R_VISIUM_16, /* type */
66 0, /* rightshift */
67 1, /* size (0 = byte, 1 = short, 2 = long) */
68 16, /* bitsize */
69 false, /* pc_relative */
70 0, /* bitpos */
71 complain_overflow_bitfield, /* complain_on_overflow */
72 bfd_elf_generic_reloc, /* special_function */
73 "R_VISIUM_16", /* name */
74 false, /* partial_inplace */
75 0x0000, /* src_mask */
76 0xffff, /* dst_mask */
77 false), /* pcrel_offset */
78
79 /* A 32 bit absolute relocation. */
80 HOWTO (R_VISIUM_32, /* type */
81 0, /* rightshift */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
83 32, /* bitsize */
84 false, /* pc_relative */
85 0, /* bitpos */
86 complain_overflow_bitfield, /* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_VISIUM_32", /* name */
89 false, /* partial_inplace */
90 0x00000000, /* src_mask */
91 0xffffffff, /* dst_mask */
92 false), /* pcrel_offset */
93
94
95 /* A 8 bit PC relative relocation. */
96 HOWTO (R_VISIUM_8_PCREL, /* type */
97 0, /* rightshift */
98 0, /* size (0 = byte, 1 = short, 2 = long) */
99 8, /* bitsize */
100 true, /* pc_relative */
101 0, /* bitpos */
102 complain_overflow_bitfield, /* complain_on_overflow */
103 bfd_elf_generic_reloc, /* special_function */
104 "R_VISIUM_8_PCREL", /* name */
105 false, /* partial_inplace */
106 0x00, /* src_mask */
107 0xff, /* dst_mask */
108 true), /* pcrel_offset */
109
110 /* A 16 bit PC relative relocation. */
111 HOWTO (R_VISIUM_16_PCREL, /* type */
112 0, /* rightshift */
113 1, /* size (0 = byte, 1 = short, 2 = long) */
114 16, /* bitsize */
115 true, /* pc_relative */
116 0, /* bitpos */
117 complain_overflow_bitfield, /* complain_on_overflow */
118 bfd_elf_generic_reloc, /* special_function */
119 "R_VISIUM_16_PCREL", /* name */
120 false, /* partial inplace */
121 0x0000, /* src_mask */
122 0xffff, /* dst_mask */
123 true), /* pcrel_offset */
124
125 /* A 32-bit PC relative relocation. */
126 HOWTO (R_VISIUM_32_PCREL, /* type */
127 0, /* rightshift */
128 2, /* size (0 = byte, 1 = short, 2 = long) */
129 32, /* bitsize */
130 true, /* pc_relative */
131 0, /* bitpos */
132 complain_overflow_bitfield, /* complain_on_overflow */
133 bfd_elf_generic_reloc, /* special_function */
134 "R_VISIUM_32_PCREL", /* name */
135 false, /* partial_inplace */
136 0, /* src_mask */
137 0xffffffff, /* dst_mask */
138 true), /* pcrel_offset */
139
140 /* A 16-bit PC word relative offset, relative to start of instruction
141 and always in the second half of the instruction. */
142 HOWTO (R_VISIUM_PC16, /* type */
143 2, /* rightshift */
144 2, /* size (0 = byte, 1 = short, 2 = long) */
145 16, /* bitsize */
146 true, /* pc_relative */
147 0, /* bitpos */
148 complain_overflow_signed, /* complain_on_overflow */
149 visium_elf_howto_parity_reloc, /* special_function */
150 "R_VISIUM_PC16", /* name */
151 false, /* partial_inplace */
152 0x00000000, /* src_mask */
153 0x0000ffff, /* dst_mask */
154 true), /* pcrel_offset */
155
156 /* The high 16 bits of symbol value. */
157 HOWTO (R_VISIUM_HI16, /* type */
158 16, /* rightshift */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
160 16, /* bitsize */
161 false, /* pc_relative */
162 0, /* bitpos */
163 complain_overflow_dont, /* complain_on_overflow */
164 visium_elf_howto_parity_reloc, /* special_function */
165 "R_VISIUM_HI16", /* name */
166 false, /* partial_inplace */
167 0x00000000, /* src_mask */
168 0x0000ffff, /* dst_mask */
169 false), /* pcrel_offset */
170
171 /* The low 16 bits of symbol value. */
172 HOWTO (R_VISIUM_LO16, /* type */
173 0, /* rightshift */
174 2, /* size (0 = byte, 1 = short, 2 = long) */
175 16, /* bitsize */
176 false, /* pc_relative */
177 0, /* bitpos */
178 complain_overflow_dont, /* complain_on_overflow */
179 visium_elf_howto_parity_reloc, /* special_function */
180 "R_VISIUM_LO16", /* name */
181 false, /* partial_inplace */
182 0x00000000, /* src_mask */
183 0x0000ffff, /* dst_mask */
184 false), /* pcrel_offset */
185
186 /* A 16 bit immediate value. */
187 HOWTO (R_VISIUM_IM16, /* type */
188 0, /* rightshift */
189 2, /* size (0 = byte, 1 = short, 2 = long) */
190 16, /* bitsize */
191 false, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_unsigned, /* complain_on_overflow */
194 visium_elf_howto_parity_reloc, /* special_function */
195 "R_VISIUM_IM16", /* name */
196 false, /* partial_inplace */
197 0x0000000, /* src_mask */
198 0x000ffff, /* dst_mask */
199 false), /* pcrel_offset */
200
201 /* The high 16 bits of symbol value, pc relative. */
202 HOWTO (R_VISIUM_HI16_PCREL, /* type */
203 16, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 16, /* bitsize */
206 true, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_dont, /* complain_on_overflow */
209 visium_elf_howto_parity_reloc, /* special_function */
210 "R_VISIUM_HI16_PCREL", /* name */
211 false, /* partial_inplace */
212 0x00000000, /* src_mask */
213 0x0000ffff, /* dst_mask */
214 true), /* pcrel_offset */
215
216 /* The low 16 bits of symbol value, pc relative. */
217 HOWTO (R_VISIUM_LO16_PCREL, /* type */
218 0, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 16, /* bitsize */
221 true, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_dont, /* complain_on_overflow */
224 visium_elf_howto_parity_reloc, /* special_function */
225 "R_VISIUM_LO16_PCREL", /* name */
226 false, /* partial_inplace */
227 0x00000000, /* src_mask */
228 0x0000ffff, /* dst_mask */
229 true), /* pcrel_offset */
230
231 /* A 16 bit immediate value, pc relative. */
232 HOWTO (R_VISIUM_IM16_PCREL, /* type */
233 0, /* rightshift */
234 2, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 true, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_unsigned, /* complain_on_overflow */
239 visium_elf_howto_parity_reloc, /* special_function */
240 "R_VISIUM_IM16_PCREL", /* name */
241 false, /* partial_inplace */
242 0x0000000, /* src_mask */
243 0x000ffff, /* dst_mask */
244 true), /* pcrel_offset */
245
246 };
247
248 /* GNU extension to record C++ vtable hierarchy. */
249 static reloc_howto_type visium_elf_vtinherit_howto =
250 HOWTO (R_VISIUM_GNU_VTINHERIT, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 0, /* bitsize */
254 false, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_dont, /* complain_on_overflow */
257 NULL, /* special_function */
258 "R_VISIUM_GNU_VTINHERIT", /* name */
259 false, /* partial_inplace */
260 0, /* src_mask */
261 0, /* dst_mask */
262 false); /* pcrel_offset */
263
264 /* GNU extension to record C++ vtable member usage. */
265 static reloc_howto_type visium_elf_vtentry_howto =
266 HOWTO (R_VISIUM_GNU_VTENTRY, /* type */
267 0, /* rightshift */
268 2, /* size (0 = byte, 1 = short, 2 = long) */
269 0, /* bitsize */
270 false, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont, /* complain_on_overflow */
273 NULL, /* special_function */
274 "R_VISIUM_GNU_VTENTRY", /* name */
275 false, /* partial_inplace */
276 0, /* src_mask */
277 0, /* dst_mask */
278 false); /* pcrel_offset */
279
280 /* Return the parity bit for INSN shifted to its final position. */
281
282 static bfd_vma
visium_parity_bit(bfd_vma insn)283 visium_parity_bit (bfd_vma insn)
284 {
285 bfd_vma p = 0;
286 int i;
287
288 for (i = 0; i < 31; i++)
289 {
290 p ^= (insn & 1);
291 insn >>= 1;
292 }
293
294 return p << 31;
295 }
296
297 /* This "special function" will only be used when the input and
298 output files have different formats ie. when generating S-records
299 directly using "--oformat srec". Otherwise we use
300 _bfd_final_link_relocate which uses a howto structure, but does
301 not use the special_function field.
302
303 It sets instruction parity to even. This cannot be done by a howto. */
304
305 static bfd_reloc_status_type
visium_elf_howto_parity_reloc(bfd * input_bfd,arelent * reloc_entry,asymbol * symbol,PTR data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)306 visium_elf_howto_parity_reloc (bfd * input_bfd, arelent *reloc_entry,
307 asymbol *symbol, PTR data,
308 asection *input_section, bfd *output_bfd,
309 char **error_message ATTRIBUTE_UNUSED)
310 {
311 bfd_reloc_status_type ret;
312 bfd_vma relocation;
313 bfd_byte *inplace_address;
314 bfd_vma insn;
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 relocation -= input_section->output_offset;
355 relocation -= reloc_entry->address;
356 }
357
358 switch (reloc_entry->howto->type)
359 {
360 case R_VISIUM_PC16:
361 if (ret == bfd_reloc_ok
362 && ((bfd_signed_vma) relocation < -0x20000
363 || (bfd_signed_vma) relocation > 0x1ffff))
364 ret = bfd_reloc_overflow;
365 relocation = (relocation >> 2) & 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 *
visium_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)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 *
visium_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)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 bool
visium_info_to_howto_rela(bfd * abfd,arelent * cache_ptr,Elf_Internal_Rela * dst)462 visium_info_to_howto_rela (bfd *abfd, 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 >= ARRAY_SIZE (visium_elf_howto_table))
479 {
480 /* xgettext:c-format */
481 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
482 abfd, r_type);
483 bfd_set_error (bfd_error_bad_value);
484 return false;
485 }
486 cache_ptr->howto = &visium_elf_howto_table[r_type];
487 break;
488 }
489 return true;
490 }
491
492 /* Look through the relocs for a section during the first phase.
493 Since we don't do .gots or .plts, we just need to consider the
494 virtual table relocs for gc. */
495
496 static bool
visium_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)497 visium_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
498 asection *sec, const Elf_Internal_Rela *relocs)
499 {
500 Elf_Internal_Shdr *symtab_hdr;
501 struct elf_link_hash_entry **sym_hashes;
502 const Elf_Internal_Rela *rel;
503 const Elf_Internal_Rela *rel_end;
504
505 if (bfd_link_relocatable (info))
506 return true;
507
508 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
509 sym_hashes = elf_sym_hashes (abfd);
510
511 rel_end = relocs + sec->reloc_count;
512 for (rel = relocs; rel < rel_end; rel++)
513 {
514 struct elf_link_hash_entry *h;
515 unsigned long r_symndx;
516
517 r_symndx = ELF32_R_SYM (rel->r_info);
518 if (r_symndx < symtab_hdr->sh_info)
519 h = NULL;
520 else
521 {
522 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
523 while (h->root.type == bfd_link_hash_indirect
524 || h->root.type == bfd_link_hash_warning)
525 h = (struct elf_link_hash_entry *) h->root.u.i.link;
526 }
527
528 switch (ELF32_R_TYPE (rel->r_info))
529 {
530 /* This relocation describes the C++ object vtable hierarchy.
531 Reconstruct it for later use during GC. */
532 case R_VISIUM_GNU_VTINHERIT:
533 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
534 return false;
535 break;
536
537 /* This relocation describes which C++ vtable entries are actually
538 used. Record for later use during GC. */
539 case R_VISIUM_GNU_VTENTRY:
540 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
541 return false;
542 break;
543 }
544 }
545
546 return true;
547 }
548
549 /* Relocate a VISIUM ELF section. */
550
551 static int
visium_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)552 visium_elf_relocate_section (bfd *output_bfd,
553 struct bfd_link_info *info, bfd *input_bfd,
554 asection *input_section, bfd_byte *contents,
555 Elf_Internal_Rela *relocs,
556 Elf_Internal_Sym *local_syms,
557 asection **local_sections)
558 {
559 Elf_Internal_Shdr *symtab_hdr;
560 struct elf_link_hash_entry **sym_hashes;
561 Elf_Internal_Rela *rel;
562 Elf_Internal_Rela *relend;
563
564 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
565 sym_hashes = elf_sym_hashes (input_bfd);
566 relend = relocs + input_section->reloc_count;
567
568 for (rel = relocs; rel < relend; rel++)
569 {
570 reloc_howto_type *howto;
571 unsigned long r_symndx;
572 Elf_Internal_Sym *sym;
573 asection *sec;
574 struct elf_link_hash_entry *h;
575 bfd_vma relocation;
576 bfd_reloc_status_type r;
577 const char *name = NULL;
578 int r_type;
579 bfd_vma insn;
580
581 r_type = ELF32_R_TYPE (rel->r_info);
582
583 if (r_type == R_VISIUM_GNU_VTINHERIT || r_type == R_VISIUM_GNU_VTENTRY)
584 continue;
585
586 r_symndx = ELF32_R_SYM (rel->r_info);
587
588 howto = visium_elf_howto_table + ELF32_R_TYPE (rel->r_info);
589 h = NULL;
590 sym = NULL;
591 sec = NULL;
592
593 if (r_symndx < symtab_hdr->sh_info)
594 {
595 /* This is a local symbol. */
596 sym = local_syms + r_symndx;
597 sec = local_sections[r_symndx];
598 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
599
600 name = bfd_elf_string_from_elf_section
601 (input_bfd, symtab_hdr->sh_link, sym->st_name);
602 name = name == NULL ? bfd_section_name (sec) : name;
603 }
604 else
605 {
606 bool unresolved_reloc;
607 bool warned, ignored;
608
609 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
610 r_symndx, symtab_hdr, sym_hashes,
611 h, sec, relocation,
612 unresolved_reloc, warned, ignored);
613
614 name = h->root.root.string;
615 }
616
617 if (sec != NULL && discarded_section (sec))
618 {
619 /* For relocs against symbols from removed linkonce sections,
620 or sections discarded by a linker script, we just want the
621 section contents zeroed. Avoid any special processing. */
622 _bfd_clear_contents (howto, input_bfd, input_section,
623 contents, rel->r_offset);
624
625 rel->r_info = 0;
626 rel->r_addend = 0;
627 continue;
628 }
629
630 if (bfd_link_relocatable (info))
631 continue;
632
633 switch (r_type)
634 {
635 case R_VISIUM_PC16:
636 case R_VISIUM_HI16:
637 case R_VISIUM_LO16:
638 case R_VISIUM_IM16:
639 case R_VISIUM_HI16_PCREL:
640 case R_VISIUM_LO16_PCREL:
641 case R_VISIUM_IM16_PCREL:
642 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
643 contents, rel->r_offset,
644 relocation, rel->r_addend);
645
646 /* For instruction relocations, the parity needs correcting. */
647 if (r == bfd_reloc_ok)
648 {
649 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
650 insn = (insn & 0x7fffffff) | visium_parity_bit (insn);
651 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
652 }
653 break;
654
655 default:
656 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
657 contents, rel->r_offset,
658 relocation, rel->r_addend);
659 break;
660 }
661
662 if (r != bfd_reloc_ok)
663 {
664 const char *msg = (const char *) NULL;
665
666 switch (r)
667 {
668 case bfd_reloc_overflow:
669 (*info->callbacks->reloc_overflow)
670 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
671 input_bfd, input_section, rel->r_offset);
672 break;
673
674 case bfd_reloc_undefined:
675 (*info->callbacks->undefined_symbol)
676 (info, name, input_bfd, input_section, rel->r_offset, true);
677 break;
678
679 case bfd_reloc_outofrange:
680 msg = _("internal error: out of range error");
681 break;
682
683 case bfd_reloc_notsupported:
684 msg = _("internal error: unsupported relocation error");
685 break;
686
687 case bfd_reloc_dangerous:
688 msg = _("internal error: dangerous relocation");
689 break;
690
691 default:
692 msg = _("internal error: unknown error");
693 break;
694 }
695
696 if (msg)
697 (*info->callbacks->warning) (info, msg, name, input_bfd,
698 input_section, rel->r_offset);
699 }
700 }
701
702 return true;
703 }
704
705 /* This function is called during section gc to discover the section a
706 to which a particular relocation refers. Return the section that
707 should be marked against GC for a given relocation. */
708
709 static asection *
visium_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)710 visium_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info,
711 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h,
712 Elf_Internal_Sym *sym)
713 {
714 if (h != NULL)
715 switch (ELF32_R_TYPE (rel->r_info))
716 {
717 case R_VISIUM_GNU_VTINHERIT:
718 case R_VISIUM_GNU_VTENTRY:
719 return NULL;
720 }
721
722 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
723 }
724
725 static bool
visium_elf_init_file_header(bfd * abfd,struct bfd_link_info * info)726 visium_elf_init_file_header (bfd *abfd, struct bfd_link_info *info)
727 {
728 Elf_Internal_Ehdr *i_ehdrp;
729
730 if (!_bfd_elf_init_file_header (abfd, info))
731 return false;
732
733 i_ehdrp = elf_elfheader (abfd);
734 i_ehdrp->e_ident[EI_ABIVERSION] = 1;
735 return true;
736 }
737
738 /* Function to set the ELF flag bits. */
739
740 static bool
visium_elf_set_private_flags(bfd * abfd,flagword flags)741 visium_elf_set_private_flags (bfd *abfd, flagword flags)
742 {
743 elf_elfheader (abfd)->e_flags = flags;
744 elf_flags_init (abfd) = true;
745 return true;
746 }
747
748 /* Copy backend specific data from one object module to another. */
749
750 static bool
visium_elf_copy_private_bfd_data(bfd * ibfd,bfd * obfd)751 visium_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
752 {
753 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
754 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
755 return true;
756
757 BFD_ASSERT (!elf_flags_init (obfd)
758 || elf_elfheader (obfd)->e_flags ==
759 elf_elfheader (ibfd)->e_flags);
760
761 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
762 elf_flags_init (obfd) = true;
763
764 /* Copy object attributes. */
765 _bfd_elf_copy_obj_attributes (ibfd, obfd);
766
767 return true;
768 }
769
770 /* Merge backend specific data from an object
771 file to the output object file when linking. */
772
773 static bool
visium_elf_merge_private_bfd_data(bfd * ibfd,struct bfd_link_info * info)774 visium_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
775 {
776 bfd *obfd = info->output_bfd;
777 flagword old_flags;
778 flagword new_flags;
779 flagword mismatch;
780 const char *opt_arch = NULL;
781 const char *new_opt_with = NULL;
782 const char *old_opt_with = NULL;
783 const char *with = "with";
784 const char *without = "without";
785 const char *mcm = "mcm";
786 const char *mcm24 = "mcm24";
787 const char *gr6 = "gr6";
788
789 new_flags = elf_elfheader (ibfd)->e_flags;
790 old_flags = elf_elfheader (obfd)->e_flags;
791
792 if (!elf_flags_init (obfd))
793 {
794 /* First call, no flags set. */
795 elf_flags_init (obfd) = true;
796 elf_elfheader (obfd)->e_flags = new_flags;
797 }
798 else
799 {
800 mismatch = (new_flags ^ old_flags)
801 & (EF_VISIUM_ARCH_MCM | EF_VISIUM_ARCH_MCM24 | EF_VISIUM_ARCH_GR6);
802 if (mismatch & EF_VISIUM_ARCH_GR6)
803 {
804 opt_arch = gr6;
805 new_opt_with = new_flags & EF_VISIUM_ARCH_GR6 ? with : without;
806 old_opt_with = old_flags & EF_VISIUM_ARCH_GR6 ? with : without;
807 }
808 else if (mismatch & EF_VISIUM_ARCH_MCM)
809 {
810 opt_arch = mcm;
811 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM ? with : without;
812 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM ? with : without;
813 }
814 else if (mismatch & EF_VISIUM_ARCH_MCM24)
815 {
816 opt_arch = mcm24;
817 new_opt_with = new_flags & EF_VISIUM_ARCH_MCM24 ? with : without;
818 old_opt_with = old_flags & EF_VISIUM_ARCH_MCM24 ? with : without;
819 }
820
821 if (mismatch)
822 _bfd_error_handler
823 /* xgettext:c-format */
824 (_("%pB: compiled %s -mtune=%s and linked with modules"
825 " compiled %s -mtune=%s"),
826 ibfd, new_opt_with, opt_arch, old_opt_with, opt_arch);
827 }
828
829 return true;
830 }
831
832 static bool
visium_elf_print_private_bfd_data(bfd * abfd,void * ptr)833 visium_elf_print_private_bfd_data (bfd *abfd, void *ptr)
834 {
835 FILE *file = (FILE *) ptr;
836 flagword flags;
837
838 BFD_ASSERT (abfd != NULL && ptr != NULL);
839
840 /* Print normal ELF private data. */
841 _bfd_elf_print_private_bfd_data (abfd, ptr);
842
843 flags = elf_elfheader (abfd)->e_flags;
844 fprintf (file, _("private flags = 0x%lx:"), (long) flags);
845
846 if (flags & EF_VISIUM_ARCH_GR6)
847 fprintf (file, " -mtune=gr6");
848 else if (flags & EF_VISIUM_ARCH_MCM)
849 fprintf (file, " -mtune=mcm");
850 else if (flags & EF_VISIUM_ARCH_MCM24)
851 fprintf (file, " -mtune=mcm24");
852
853 fputc ('\n', file);
854 return true;
855 }
856
857 #define ELF_ARCH bfd_arch_visium
858 #define ELF_MACHINE_CODE EM_VISIUM
859 #define ELF_OSABI ELFOSABI_STANDALONE
860 #define ELF_MAXPAGESIZE 1
861
862 #define TARGET_BIG_SYM visium_elf32_vec
863 #define TARGET_BIG_NAME "elf32-visium"
864
865 #define elf_info_to_howto_rel NULL
866 #define elf_info_to_howto visium_info_to_howto_rela
867 #define elf_backend_relocate_section visium_elf_relocate_section
868 #define elf_backend_gc_mark_hook visium_elf_gc_mark_hook
869 #define elf_backend_check_relocs visium_elf_check_relocs
870 #define elf_backend_rela_normal 1
871
872 #define elf_backend_can_gc_sections 1
873
874 #define bfd_elf32_bfd_reloc_type_lookup visium_reloc_type_lookup
875 #define bfd_elf32_bfd_reloc_name_lookup visium_reloc_name_lookup
876
877 #define bfd_elf32_bfd_set_private_flags visium_elf_set_private_flags
878 #define bfd_elf32_bfd_copy_private_bfd_data visium_elf_copy_private_bfd_data
879 #define bfd_elf32_bfd_merge_private_bfd_data visium_elf_merge_private_bfd_data
880 #define bfd_elf32_bfd_print_private_bfd_data visium_elf_print_private_bfd_data
881 #define elf_backend_init_file_header visium_elf_init_file_header
882
883 #include "elf32-target.h"
884